diff options
Diffstat (limited to 'src/os/bluestore')
34 files changed, 35709 insertions, 0 deletions
diff --git a/src/os/bluestore/Allocator.cc b/src/os/bluestore/Allocator.cc new file mode 100644 index 000000000..f92821f0c --- /dev/null +++ b/src/os/bluestore/Allocator.cc @@ -0,0 +1,212 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#include "Allocator.h" +#include "StupidAllocator.h" +#include "BitmapAllocator.h" +#include "AvlAllocator.h" +#include "HybridAllocator.h" +#ifdef HAVE_LIBZBD +#include "ZonedAllocator.h" +#endif +#include "common/debug.h" +#include "common/admin_socket.h" +#define dout_subsys ceph_subsys_bluestore + +using std::string; +using std::to_string; + +using ceph::bufferlist; +using ceph::Formatter; + +class Allocator::SocketHook : public AdminSocketHook { + Allocator *alloc; + + friend class Allocator; + std::string name; +public: + explicit SocketHook(Allocator *alloc, + const std::string& _name) : + alloc(alloc), name(_name) + { + AdminSocket *admin_socket = g_ceph_context->get_admin_socket(); + if (name.empty()) { + name = to_string((uintptr_t)this); + } + if (admin_socket) { + int r = admin_socket->register_command( + ("bluestore allocator dump " + name).c_str(), + this, + "dump allocator free regions"); + if (r != 0) + alloc = nullptr; //some collision, disable + if (alloc) { + r = admin_socket->register_command( + ("bluestore allocator score " + name).c_str(), + this, + "give score on allocator fragmentation (0-no fragmentation, 1-absolute fragmentation)"); + ceph_assert(r == 0); + r = admin_socket->register_command( + ("bluestore allocator fragmentation " + name).c_str(), + this, + "give allocator fragmentation (0-no fragmentation, 1-absolute fragmentation)"); + ceph_assert(r == 0); + } + } + } + ~SocketHook() + { + AdminSocket *admin_socket = g_ceph_context->get_admin_socket(); + if (admin_socket && alloc) { + admin_socket->unregister_commands(this); + } + } + + int call(std::string_view command, + const cmdmap_t& cmdmap, + Formatter *f, + std::ostream& ss, + bufferlist& out) override { + int r = 0; + if (command == "bluestore allocator dump " + name) { + f->open_object_section("allocator_dump"); + f->dump_unsigned("capacity", alloc->get_capacity()); + f->dump_unsigned("alloc_unit", alloc->get_block_size()); + f->dump_string("alloc_type", alloc->get_type()); + f->dump_string("alloc_name", name); + + f->open_array_section("extents"); + auto iterated_allocation = [&](size_t off, size_t len) { + ceph_assert(len > 0); + f->open_object_section("free"); + char off_hex[30]; + char len_hex[30]; + snprintf(off_hex, sizeof(off_hex) - 1, "0x%lx", off); + snprintf(len_hex, sizeof(len_hex) - 1, "0x%lx", len); + f->dump_string("offset", off_hex); + f->dump_string("length", len_hex); + f->close_section(); + }; + alloc->foreach(iterated_allocation); + f->close_section(); + f->close_section(); + } else if (command == "bluestore allocator score " + name) { + f->open_object_section("fragmentation_score"); + f->dump_float("fragmentation_rating", alloc->get_fragmentation_score()); + f->close_section(); + } else if (command == "bluestore allocator fragmentation " + name) { + f->open_object_section("fragmentation"); + f->dump_float("fragmentation_rating", alloc->get_fragmentation()); + f->close_section(); + } else { + ss << "Invalid command" << std::endl; + r = -ENOSYS; + } + return r; + } + +}; +Allocator::Allocator(const std::string& name, + int64_t _capacity, + int64_t _block_size) + : capacity(_capacity), block_size(_block_size) +{ + asok_hook = new SocketHook(this, name); +} + + +Allocator::~Allocator() +{ + delete asok_hook; +} + +const string& Allocator::get_name() const { + return asok_hook->name; +} + +Allocator *Allocator::create(CephContext* cct, string type, + int64_t size, int64_t block_size, const std::string& name) +{ + Allocator* alloc = nullptr; + if (type == "stupid") { + alloc = new StupidAllocator(cct, name, size, block_size); + } else if (type == "bitmap") { + alloc = new BitmapAllocator(cct, size, block_size, name); + } else if (type == "avl") { + return new AvlAllocator(cct, size, block_size, name); + } else if (type == "hybrid") { + return new HybridAllocator(cct, size, block_size, + cct->_conf.get_val<uint64_t>("bluestore_hybrid_alloc_mem_cap"), + name); +#ifdef HAVE_LIBZBD + } else if (type == "zoned") { + return new ZonedAllocator(cct, size, block_size, name); +#endif + } + if (alloc == nullptr) { + lderr(cct) << "Allocator::" << __func__ << " unknown alloc type " + << type << dendl; + } + return alloc; +} + +void Allocator::release(const PExtentVector& release_vec) +{ + interval_set<uint64_t> release_set; + for (auto e : release_vec) { + release_set.insert(e.offset, e.length); + } + release(release_set); +} + +/** + * Gives fragmentation a numeric value. + * + * Following algorithm applies value to each existing free unallocated block. + * Value of single block is a multiply of size and per-byte-value. + * Per-byte-value is greater for larger blocks. + * Assume block size X has value per-byte p; then block size 2*X will have per-byte value 1.1*p. + * + * This could be expressed in logarithms, but for speed this is interpolated inside ranges. + * [1] [2..3] [4..7] [8..15] ... + * ^ ^ ^ ^ + * 1.1 1.1^2 1.1^3 1.1^4 ... + * + * Final score is obtained by proportion between score that would have been obtained + * in condition of absolute fragmentation and score in no fragmentation at all. + */ +double Allocator::get_fragmentation_score() +{ + // this value represents how much worth is 2X bytes in one chunk then in X + X bytes + static const double double_size_worth = 1.1 ; + std::vector<double> scales{1}; + double score_sum = 0; + size_t sum = 0; + + auto get_score = [&](size_t v) -> double { + size_t sc = sizeof(v) * 8 - clz(v) - 1; //assign to grade depending on log2(len) + while (scales.size() <= sc + 1) { + //unlikely expand scales vector + scales.push_back(scales[scales.size() - 1] * double_size_worth); + } + + size_t sc_shifted = size_t(1) << sc; + double x = double(v - sc_shifted) / sc_shifted; //x is <0,1) in its scale grade + // linear extrapolation in its scale grade + double score = (sc_shifted ) * scales[sc] * (1-x) + + (sc_shifted * 2) * scales[sc+1] * x; + return score; + }; + + auto iterated_allocation = [&](size_t off, size_t len) { + ceph_assert(len > 0); + score_sum += get_score(len); + sum += len; + }; + foreach(iterated_allocation); + + + double ideal = get_score(sum); + double terrible = sum * get_score(1); + return (ideal - score_sum) / (ideal - terrible); +} diff --git a/src/os/bluestore/Allocator.h b/src/os/bluestore/Allocator.h new file mode 100644 index 000000000..38ea4f997 --- /dev/null +++ b/src/os/bluestore/Allocator.h @@ -0,0 +1,98 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab +/* + * Ceph - scalable distributed file system + * + * This is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License version 2.1, as published by the Free Software + * Foundation. See file COPYING. + * + */ +#ifndef CEPH_OS_BLUESTORE_ALLOCATOR_H +#define CEPH_OS_BLUESTORE_ALLOCATOR_H + +#include <functional> +#include <ostream> +#include "include/ceph_assert.h" +#include "bluestore_types.h" +#include "zoned_types.h" + +class Allocator { +public: + explicit Allocator(const std::string& name, + int64_t _capacity, + int64_t _block_size); + virtual ~Allocator(); + + /* + * returns allocator type name as per names in config + */ + virtual const char* get_type() const = 0; + + /* + * Allocate required number of blocks in n number of extents. + * Min and Max number of extents are limited by: + * a. alloc unit + * b. max_alloc_size. + * as no extent can be lesser than block_size and greater than max_alloc size. + * Apart from that extents can vary between these lower and higher limits according + * to free block search algorithm and availability of contiguous space. + */ + virtual int64_t allocate(uint64_t want_size, uint64_t block_size, + uint64_t max_alloc_size, int64_t hint, + PExtentVector *extents) = 0; + + int64_t allocate(uint64_t want_size, uint64_t block_size, + int64_t hint, PExtentVector *extents) { + return allocate(want_size, block_size, want_size, hint, extents); + } + + /* Bulk release. Implementations may override this method to handle the whole + * set at once. This could save e.g. unnecessary mutex dance. */ + virtual void release(const interval_set<uint64_t>& release_set) = 0; + void release(const PExtentVector& release_set); + + virtual void dump() = 0; + virtual void foreach( + std::function<void(uint64_t offset, uint64_t length)> notify) = 0; + + virtual void zoned_set_zone_states(std::vector<zone_state_t> &&_zone_states) {} + virtual bool zoned_get_zones_to_clean(std::deque<uint64_t> *zones_to_clean) { + return false; + } + + virtual void init_add_free(uint64_t offset, uint64_t length) = 0; + virtual void init_rm_free(uint64_t offset, uint64_t length) = 0; + + virtual uint64_t get_free() = 0; + virtual double get_fragmentation() + { + return 0.0; + } + virtual double get_fragmentation_score(); + virtual void shutdown() = 0; + + static Allocator *create(CephContext* cct, std::string type, int64_t size, + int64_t block_size, const std::string& name = ""); + + + const string& get_name() const; + int64_t get_capacity() const + { + return capacity; + } + int64_t get_block_size() const + { + return block_size; + } + +private: + class SocketHook; + SocketHook* asok_hook = nullptr; + + int64_t capacity = 0; + int64_t block_size = 0; +}; + +#endif diff --git a/src/os/bluestore/AvlAllocator.cc b/src/os/bluestore/AvlAllocator.cc new file mode 100644 index 000000000..5f17a3689 --- /dev/null +++ b/src/os/bluestore/AvlAllocator.cc @@ -0,0 +1,474 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#include "AvlAllocator.h" + +#include <limits> + +#include "common/config_proxy.h" +#include "common/debug.h" + +#define dout_context cct +#define dout_subsys ceph_subsys_bluestore +#undef dout_prefix +#define dout_prefix *_dout << "AvlAllocator " + +MEMPOOL_DEFINE_OBJECT_FACTORY(range_seg_t, range_seg_t, bluestore_alloc); + +namespace { + // a light-weight "range_seg_t", which only used as the key when searching in + // range_tree and range_size_tree + struct range_t { + uint64_t start; + uint64_t end; + }; +} + +/* + * This is a helper function that can be used by the allocator to find + * a suitable block to allocate. This will search the specified AVL + * tree looking for a block that matches the specified criteria. + */ +uint64_t AvlAllocator::_pick_block_after(uint64_t *cursor, + uint64_t size, + uint64_t align) +{ + const auto compare = range_tree.key_comp(); + uint32_t search_count = 0; + uint64_t search_bytes = 0; + auto rs_start = range_tree.lower_bound(range_t{*cursor, size}, compare); + for (auto rs = rs_start; rs != range_tree.end(); ++rs) { + uint64_t offset = p2roundup(rs->start, align); + *cursor = offset + size; + if (offset + size <= rs->end) { + return offset; + } + if (max_search_count > 0 && ++search_count > max_search_count) { + return -1ULL; + } + if (search_bytes = rs->start - rs_start->start; + max_search_bytes > 0 && search_bytes > max_search_bytes) { + return -1ULL; + } + } + + if (*cursor == 0) { + // If we already started from beginning, don't bother with searching from beginning + return -1ULL; + } + // If we reached end, start from beginning till cursor. + for (auto rs = range_tree.begin(); rs != rs_start; ++rs) { + uint64_t offset = p2roundup(rs->start, align); + *cursor = offset + size; + if (offset + size <= rs->end) { + return offset; + } + if (max_search_count > 0 && ++search_count > max_search_count) { + return -1ULL; + } + if (max_search_bytes > 0 && search_bytes + rs->start > max_search_bytes) { + return -1ULL; + } + } + return -1ULL; +} + +uint64_t AvlAllocator::_pick_block_fits(uint64_t size, + uint64_t align) +{ + // instead of searching from cursor, just pick the smallest range which fits + // the needs + const auto compare = range_size_tree.key_comp(); + auto rs_start = range_size_tree.lower_bound(range_t{0, size}, compare); + for (auto rs = rs_start; rs != range_size_tree.end(); ++rs) { + uint64_t offset = p2roundup(rs->start, align); + if (offset + size <= rs->end) { + return offset; + } + } + return -1ULL; +} + +void AvlAllocator::_add_to_tree(uint64_t start, uint64_t size) +{ + ceph_assert(size != 0); + + uint64_t end = start + size; + + auto rs_after = range_tree.upper_bound(range_t{start, end}, + range_tree.key_comp()); + + /* Make sure we don't overlap with either of our neighbors */ + auto rs_before = range_tree.end(); + if (rs_after != range_tree.begin()) { + rs_before = std::prev(rs_after); + } + + bool merge_before = (rs_before != range_tree.end() && rs_before->end == start); + bool merge_after = (rs_after != range_tree.end() && rs_after->start == end); + + if (merge_before && merge_after) { + _range_size_tree_rm(*rs_before); + _range_size_tree_rm(*rs_after); + rs_after->start = rs_before->start; + range_tree.erase_and_dispose(rs_before, dispose_rs{}); + _range_size_tree_try_insert(*rs_after); + } else if (merge_before) { + _range_size_tree_rm(*rs_before); + rs_before->end = end; + _range_size_tree_try_insert(*rs_before); + } else if (merge_after) { + _range_size_tree_rm(*rs_after); + rs_after->start = start; + _range_size_tree_try_insert(*rs_after); + } else { + _try_insert_range(start, end, &rs_after); + } +} + +void AvlAllocator::_process_range_removal(uint64_t start, uint64_t end, + AvlAllocator::range_tree_t::iterator& rs) +{ + bool left_over = (rs->start != start); + bool right_over = (rs->end != end); + + _range_size_tree_rm(*rs); + + if (left_over && right_over) { + auto old_right_end = rs->end; + auto insert_pos = rs; + ceph_assert(insert_pos != range_tree.end()); + ++insert_pos; + rs->end = start; + + // Insert tail first to be sure insert_pos hasn't been disposed. + // This woulnd't dispose rs though since it's out of range_size_tree. + // Don't care about a small chance of 'not-the-best-choice-for-removal' case + // which might happen if rs has the lowest size. + _try_insert_range(end, old_right_end, &insert_pos); + _range_size_tree_try_insert(*rs); + + } else if (left_over) { + rs->end = start; + _range_size_tree_try_insert(*rs); + } else if (right_over) { + rs->start = end; + _range_size_tree_try_insert(*rs); + } else { + range_tree.erase_and_dispose(rs, dispose_rs{}); + } +} + +void AvlAllocator::_remove_from_tree(uint64_t start, uint64_t size) +{ + uint64_t end = start + size; + + ceph_assert(size != 0); + ceph_assert(size <= num_free); + + auto rs = range_tree.find(range_t{start, end}, range_tree.key_comp()); + /* Make sure we completely overlap with someone */ + ceph_assert(rs != range_tree.end()); + ceph_assert(rs->start <= start); + ceph_assert(rs->end >= end); + + _process_range_removal(start, end, rs); +} + +void AvlAllocator::_try_remove_from_tree(uint64_t start, uint64_t size, + std::function<void(uint64_t, uint64_t, bool)> cb) +{ + uint64_t end = start + size; + + ceph_assert(size != 0); + + auto rs = range_tree.find(range_t{ start, end }, + range_tree.key_comp()); + + if (rs == range_tree.end() || rs->start >= end) { + cb(start, size, false); + return; + } + + do { + + auto next_rs = rs; + ++next_rs; + + if (start < rs->start) { + cb(start, rs->start - start, false); + start = rs->start; + } + auto range_end = std::min(rs->end, end); + _process_range_removal(start, range_end, rs); + cb(start, range_end - start, true); + start = range_end; + + rs = next_rs; + } while (rs != range_tree.end() && rs->start < end && start < end); + if (start < end) { + cb(start, end - start, false); + } +} + +int64_t AvlAllocator::_allocate( + uint64_t want, + uint64_t unit, + uint64_t max_alloc_size, + int64_t hint, // unused, for now! + PExtentVector* extents) +{ + uint64_t allocated = 0; + while (allocated < want) { + uint64_t offset, length; + int r = _allocate(std::min(max_alloc_size, want - allocated), + unit, &offset, &length); + if (r < 0) { + // Allocation failed. + break; + } + extents->emplace_back(offset, length); + allocated += length; + } + return allocated ? allocated : -ENOSPC; +} + +int AvlAllocator::_allocate( + uint64_t size, + uint64_t unit, + uint64_t *offset, + uint64_t *length) +{ + uint64_t max_size = 0; + if (auto p = range_size_tree.rbegin(); p != range_size_tree.rend()) { + max_size = p->end - p->start; + } + + bool force_range_size_alloc = false; + if (max_size < size) { + if (max_size < unit) { + return -ENOSPC; + } + size = p2align(max_size, unit); + ceph_assert(size > 0); + force_range_size_alloc = true; + } + + const int free_pct = num_free * 100 / num_total; + uint64_t start = 0; + // If we're running low on space, find a range by size by looking up in the size + // sorted tree (best-fit), instead of searching in the area pointed by cursor + if (force_range_size_alloc || + max_size < range_size_alloc_threshold || + free_pct < range_size_alloc_free_pct) { + start = -1ULL; + } else { + /* + * Find the largest power of 2 block size that evenly divides the + * requested size. This is used to try to allocate blocks with similar + * alignment from the same area (i.e. same cursor bucket) but it does + * not guarantee that other allocations sizes may exist in the same + * region. + */ + uint64_t align = size & -size; + ceph_assert(align != 0); + uint64_t* cursor = &lbas[cbits(align) - 1]; + start = _pick_block_after(cursor, size, unit); + dout(20) << __func__ << " first fit=" << start << " size=" << size << dendl; + } + if (start == -1ULL) { + do { + start = _pick_block_fits(size, unit); + dout(20) << __func__ << " best fit=" << start << " size=" << size << dendl; + if (start != uint64_t(-1ULL)) { + break; + } + // try to collect smaller extents as we could fail to retrieve + // that large block due to misaligned extents + size = p2align(size >> 1, unit); + } while (size >= unit); + } + if (start == -1ULL) { + return -ENOSPC; + } + + _remove_from_tree(start, size); + + *offset = start; + *length = size; + return 0; +} + +void AvlAllocator::_release(const interval_set<uint64_t>& release_set) +{ + for (auto p = release_set.begin(); p != release_set.end(); ++p) { + const auto offset = p.get_start(); + const auto length = p.get_len(); + ldout(cct, 10) << __func__ << std::hex + << " offset 0x" << offset + << " length 0x" << length + << std::dec << dendl; + _add_to_tree(offset, length); + } +} + +void AvlAllocator::_release(const PExtentVector& release_set) { + for (auto& e : release_set) { + ldout(cct, 10) << __func__ << std::hex + << " offset 0x" << e.offset + << " length 0x" << e.length + << std::dec << dendl; + _add_to_tree(e.offset, e.length); + } +} + +void AvlAllocator::_shutdown() +{ + range_size_tree.clear(); + range_tree.clear_and_dispose(dispose_rs{}); +} + +AvlAllocator::AvlAllocator(CephContext* cct, + int64_t device_size, + int64_t block_size, + uint64_t max_mem, + const std::string& name) : + Allocator(name, device_size, block_size), + num_total(device_size), + block_size(block_size), + range_size_alloc_threshold( + cct->_conf.get_val<uint64_t>("bluestore_avl_alloc_bf_threshold")), + range_size_alloc_free_pct( + cct->_conf.get_val<uint64_t>("bluestore_avl_alloc_bf_free_pct")), + max_search_count( + cct->_conf.get_val<uint64_t>("bluestore_avl_alloc_ff_max_search_count")), + max_search_bytes( + cct->_conf.get_val<Option::size_t>("bluestore_avl_alloc_ff_max_search_bytes")), + range_count_cap(max_mem / sizeof(range_seg_t)), + cct(cct) +{} + +AvlAllocator::AvlAllocator(CephContext* cct, + int64_t device_size, + int64_t block_size, + const std::string& name) : + AvlAllocator(cct, device_size, block_size, 0 /* max_mem */, name) +{} + +AvlAllocator::~AvlAllocator() +{ + shutdown(); +} + +int64_t AvlAllocator::allocate( + uint64_t want, + uint64_t unit, + uint64_t max_alloc_size, + int64_t hint, // unused, for now! + PExtentVector* extents) +{ + ldout(cct, 10) << __func__ << std::hex + << " want 0x" << want + << " unit 0x" << unit + << " max_alloc_size 0x" << max_alloc_size + << " hint 0x" << hint + << std::dec << dendl; + ceph_assert(isp2(unit)); + ceph_assert(want % unit == 0); + + if (max_alloc_size == 0) { + max_alloc_size = want; + } + if (constexpr auto cap = std::numeric_limits<decltype(bluestore_pextent_t::length)>::max(); + max_alloc_size >= cap) { + max_alloc_size = p2align(uint64_t(cap), (uint64_t)block_size); + } + std::lock_guard l(lock); + return _allocate(want, unit, max_alloc_size, hint, extents); +} + +void AvlAllocator::release(const interval_set<uint64_t>& release_set) { + std::lock_guard l(lock); + _release(release_set); +} + +uint64_t AvlAllocator::get_free() +{ + std::lock_guard l(lock); + return num_free; +} + +double AvlAllocator::get_fragmentation() +{ + std::lock_guard l(lock); + return _get_fragmentation(); +} + +void AvlAllocator::dump() +{ + std::lock_guard l(lock); + _dump(); +} + +void AvlAllocator::_dump() const +{ + ldout(cct, 0) << __func__ << " range_tree: " << dendl; + for (auto& rs : range_tree) { + ldout(cct, 0) << std::hex + << "0x" << rs.start << "~" << rs.end + << std::dec + << dendl; + } + ldout(cct, 0) << __func__ << " range_size_tree: " << dendl; + for (auto& rs : range_size_tree) { + ldout(cct, 0) << std::hex + << "0x" << rs.start << "~" << rs.end + << std::dec + << dendl; + } +} + +void AvlAllocator::foreach( + std::function<void(uint64_t offset, uint64_t length)> notify) +{ + std::lock_guard l(lock); + _foreach(notify); +} + +void AvlAllocator::_foreach( + std::function<void(uint64_t offset, uint64_t length)> notify) const +{ + for (auto& rs : range_tree) { + notify(rs.start, rs.end - rs.start); + } +} + +void AvlAllocator::init_add_free(uint64_t offset, uint64_t length) +{ + if (!length) + return; + std::lock_guard l(lock); + ldout(cct, 10) << __func__ << std::hex + << " offset 0x" << offset + << " length 0x" << length + << std::dec << dendl; + _add_to_tree(offset, length); +} + +void AvlAllocator::init_rm_free(uint64_t offset, uint64_t length) +{ + if (!length) + return; + std::lock_guard l(lock); + ldout(cct, 10) << __func__ << std::hex + << " offset 0x" << offset + << " length 0x" << length + << std::dec << dendl; + _remove_from_tree(offset, length); +} + +void AvlAllocator::shutdown() +{ + std::lock_guard l(lock); + _shutdown(); +} diff --git a/src/os/bluestore/AvlAllocator.h b/src/os/bluestore/AvlAllocator.h new file mode 100644 index 000000000..f47ee5be0 --- /dev/null +++ b/src/os/bluestore/AvlAllocator.h @@ -0,0 +1,280 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#pragma once + +#include <mutex> +#include <boost/intrusive/avl_set.hpp> + +#include "Allocator.h" +#include "os/bluestore/bluestore_types.h" +#include "include/mempool.h" + +struct range_seg_t { + MEMPOOL_CLASS_HELPERS(); ///< memory monitoring + uint64_t start; ///< starting offset of this segment + uint64_t end; ///< ending offset (non-inclusive) + + range_seg_t(uint64_t start, uint64_t end) + : start{start}, + end{end} + {} + // Tree is sorted by offset, greater offsets at the end of the tree. + struct before_t { + template<typename KeyLeft, typename KeyRight> + bool operator()(const KeyLeft& lhs, const KeyRight& rhs) const { + return lhs.end <= rhs.start; + } + }; + boost::intrusive::avl_set_member_hook<> offset_hook; + + // Tree is sorted by size, larger sizes at the end of the tree. + struct shorter_t { + template<typename KeyType> + bool operator()(const range_seg_t& lhs, const KeyType& rhs) const { + auto lhs_size = lhs.end - lhs.start; + auto rhs_size = rhs.end - rhs.start; + if (lhs_size < rhs_size) { + return true; + } else if (lhs_size > rhs_size) { + return false; + } else { + return lhs.start < rhs.start; + } + } + }; + inline uint64_t length() const { + return end - start; + } + boost::intrusive::avl_set_member_hook<> size_hook; +}; + +class AvlAllocator : public Allocator { + struct dispose_rs { + void operator()(range_seg_t* p) + { + delete p; + } + }; + +protected: + /* + * ctor intended for the usage from descendant class(es) which + * provides handling for spilled over entries + * (when entry count >= max_entries) + */ + AvlAllocator(CephContext* cct, int64_t device_size, int64_t block_size, + uint64_t max_mem, + const std::string& name); + +public: + AvlAllocator(CephContext* cct, int64_t device_size, int64_t block_size, + const std::string& name); + ~AvlAllocator(); + const char* get_type() const override + { + return "avl"; + } + int64_t allocate( + uint64_t want, + uint64_t unit, + uint64_t max_alloc_size, + int64_t hint, + PExtentVector *extents) override; + void release(const interval_set<uint64_t>& release_set) override; + int64_t get_capacity() const { + return num_total; + } + + uint64_t get_block_size() const { + return block_size; + } + uint64_t get_free() override; + double get_fragmentation() override; + + void dump() override; + void foreach( + std::function<void(uint64_t offset, uint64_t length)> notify) override; + void init_add_free(uint64_t offset, uint64_t length) override; + void init_rm_free(uint64_t offset, uint64_t length) override; + void shutdown() override; + +private: + // pick a range by search from cursor forward + uint64_t _pick_block_after( + uint64_t *cursor, + uint64_t size, + uint64_t align); + // pick a range with exactly the same size or larger + uint64_t _pick_block_fits( + uint64_t size, + uint64_t align); + int _allocate( + uint64_t size, + uint64_t unit, + uint64_t *offset, + uint64_t *length); + + using range_tree_t = + boost::intrusive::avl_set< + range_seg_t, + boost::intrusive::compare<range_seg_t::before_t>, + boost::intrusive::member_hook< + range_seg_t, + boost::intrusive::avl_set_member_hook<>, + &range_seg_t::offset_hook>>; + range_tree_t range_tree; ///< main range tree + /* + * The range_size_tree should always contain the + * same number of segments as the range_tree. + * The only difference is that the range_size_tree + * is ordered by segment sizes. + */ + using range_size_tree_t = + boost::intrusive::avl_multiset< + range_seg_t, + boost::intrusive::compare<range_seg_t::shorter_t>, + boost::intrusive::member_hook< + range_seg_t, + boost::intrusive::avl_set_member_hook<>, + &range_seg_t::size_hook>, + boost::intrusive::constant_time_size<true>>; + range_size_tree_t range_size_tree; + + const int64_t num_total; ///< device size + const uint64_t block_size; ///< block size + uint64_t num_free = 0; ///< total bytes in freelist + + /* + * This value defines the number of elements in the ms_lbas array. + * The value of 64 was chosen as it covers all power of 2 buckets + * up to UINT64_MAX. + * This is the equivalent of highest-bit of UINT64_MAX. + */ + static constexpr unsigned MAX_LBAS = 64; + uint64_t lbas[MAX_LBAS] = {0}; + + /* + * Minimum size which forces the dynamic allocator to change + * it's allocation strategy. Once the allocator cannot satisfy + * an allocation of this size then it switches to using more + * aggressive strategy (i.e search by size rather than offset). + */ + uint64_t range_size_alloc_threshold = 0; + /* + * The minimum free space, in percent, which must be available + * in allocator to continue allocations in a first-fit fashion. + * Once the allocator's free space drops below this level we dynamically + * switch to using best-fit allocations. + */ + int range_size_alloc_free_pct = 0; + /* + * Maximum number of segments to check in the first-fit mode, without this + * limit, fragmented device can see lots of iterations and _block_picker() + * becomes the performance limiting factor on high-performance storage. + */ + const uint32_t max_search_count; + /* + * Maximum distance to search forward from the last offset, without this + * limit, fragmented device can see lots of iterations and _block_picker() + * becomes the performance limiting factor on high-performance storage. + */ + const uint32_t max_search_bytes; + /* + * Max amount of range entries allowed. 0 - unlimited + */ + uint64_t range_count_cap = 0; + + void _range_size_tree_rm(range_seg_t& r) { + ceph_assert(num_free >= r.length()); + num_free -= r.length(); + range_size_tree.erase(r); + + } + void _range_size_tree_try_insert(range_seg_t& r) { + if (_try_insert_range(r.start, r.end)) { + range_size_tree.insert(r); + num_free += r.length(); + } else { + range_tree.erase_and_dispose(r, dispose_rs{}); + } + } + bool _try_insert_range(uint64_t start, + uint64_t end, + range_tree_t::iterator* insert_pos = nullptr) { + bool res = !range_count_cap || range_size_tree.size() < range_count_cap; + bool remove_lowest = false; + if (!res) { + if (end - start > _lowest_size_available()) { + remove_lowest = true; + res = true; + } + } + if (!res) { + _spillover_range(start, end); + } else { + // NB: we should do insertion before the following removal + // to avoid potential iterator disposal insertion might depend on. + if (insert_pos) { + auto new_rs = new range_seg_t{ start, end }; + range_tree.insert_before(*insert_pos, *new_rs); + range_size_tree.insert(*new_rs); + num_free += new_rs->length(); + } + if (remove_lowest) { + auto r = range_size_tree.begin(); + _range_size_tree_rm(*r); + _spillover_range(r->start, r->end); + range_tree.erase_and_dispose(*r, dispose_rs{}); + } + } + return res; + } + virtual void _spillover_range(uint64_t start, uint64_t end) { + // this should be overriden when range count cap is present, + // i.e. (range_count_cap > 0) + ceph_assert(false); + } +protected: + // called when extent to be released/marked free + virtual void _add_to_tree(uint64_t start, uint64_t size); + +protected: + CephContext* cct; + std::mutex lock; + + double _get_fragmentation() const { + auto free_blocks = p2align(num_free, block_size) / block_size; + if (free_blocks <= 1) { + return .0; + } + return (static_cast<double>(range_tree.size() - 1) / (free_blocks - 1)); + } + void _dump() const; + void _foreach(std::function<void(uint64_t offset, uint64_t length)>) const; + + uint64_t _lowest_size_available() { + auto rs = range_size_tree.begin(); + return rs != range_size_tree.end() ? rs->length() : 0; + } + + int64_t _allocate( + uint64_t want, + uint64_t unit, + uint64_t max_alloc_size, + int64_t hint, + PExtentVector *extents); + + void _release(const interval_set<uint64_t>& release_set); + void _release(const PExtentVector& release_set); + void _shutdown(); + + void _process_range_removal(uint64_t start, uint64_t end, range_tree_t::iterator& rs); + void _remove_from_tree(uint64_t start, uint64_t size); + void _try_remove_from_tree(uint64_t start, uint64_t size, + std::function<void(uint64_t offset, uint64_t length, bool found)> cb); + + uint64_t _get_free() const { + return num_free; + } +}; diff --git a/src/os/bluestore/BitmapAllocator.cc b/src/os/bluestore/BitmapAllocator.cc new file mode 100644 index 000000000..9304cb3f2 --- /dev/null +++ b/src/os/bluestore/BitmapAllocator.cc @@ -0,0 +1,104 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#include "BitmapAllocator.h" + +#define dout_context cct +#define dout_subsys ceph_subsys_bluestore +#undef dout_prefix +#define dout_prefix *_dout << "fbmap_alloc " << this << " " + +BitmapAllocator::BitmapAllocator(CephContext* _cct, + int64_t capacity, + int64_t alloc_unit, + const std::string& name) : + Allocator(name, capacity, alloc_unit), + cct(_cct) +{ + ldout(cct, 10) << __func__ << " 0x" << std::hex << capacity << "/" + << alloc_unit << std::dec << dendl; + _init(capacity, alloc_unit, false); +} + +int64_t BitmapAllocator::allocate( + uint64_t want_size, uint64_t alloc_unit, uint64_t max_alloc_size, + int64_t hint, PExtentVector *extents) +{ + uint64_t allocated = 0; + size_t old_size = extents->size(); + ldout(cct, 10) << __func__ << std::hex << " 0x" << want_size + << "/" << alloc_unit << "," << max_alloc_size << "," << hint + << std::dec << dendl; + + + _allocate_l2(want_size, alloc_unit, max_alloc_size, hint, + &allocated, extents); + if (!allocated) { + return -ENOSPC; + } + for (auto i = old_size; i < extents->size(); ++i) { + auto& e = (*extents)[i]; + ldout(cct, 10) << __func__ + << " extent: 0x" << std::hex << e.offset << "~" << e.length + << "/" << alloc_unit << "," << max_alloc_size << "," << hint + << std::dec << dendl; + } + return int64_t(allocated); +} + +void BitmapAllocator::release( + const interval_set<uint64_t>& release_set) +{ + for (auto r : release_set) { + ldout(cct, 10) << __func__ << " 0x" << std::hex << r.first << "~" << r.second + << std::dec << dendl; + } + _free_l2(release_set); + ldout(cct, 10) << __func__ << " done" << dendl; +} + + +void BitmapAllocator::init_add_free(uint64_t offset, uint64_t length) +{ + ldout(cct, 10) << __func__ << " 0x" << std::hex << offset << "~" << length + << std::dec << dendl; + + auto mas = get_min_alloc_size(); + uint64_t offs = round_up_to(offset, mas); + uint64_t l = p2align(offset + length - offs, mas); + + _mark_free(offs, l); + ldout(cct, 10) << __func__ << " done" << dendl; +} +void BitmapAllocator::init_rm_free(uint64_t offset, uint64_t length) +{ + ldout(cct, 10) << __func__ << " 0x" << std::hex << offset << "~" << length + << std::dec << dendl; + auto mas = get_min_alloc_size(); + uint64_t offs = round_up_to(offset, mas); + uint64_t l = p2align(offset + length - offs, mas); + _mark_allocated(offs, l); + ldout(cct, 10) << __func__ << " done" << dendl; +} + +void BitmapAllocator::shutdown() +{ + ldout(cct, 1) << __func__ << dendl; + _shutdown(); +} + +void BitmapAllocator::dump() +{ + // bin -> interval count + std::map<size_t, size_t> bins_overall; + collect_stats(bins_overall); + auto it = bins_overall.begin(); + while (it != bins_overall.end()) { + ldout(cct, 0) << __func__ + << " bin " << it->first + << "(< " << byte_u_t((1 << (it->first + 1)) * get_min_alloc_size()) << ")" + << " : " << it->second << " extents" + << dendl; + ++it; + } +} diff --git a/src/os/bluestore/BitmapAllocator.h b/src/os/bluestore/BitmapAllocator.h new file mode 100644 index 000000000..bb6fa73a1 --- /dev/null +++ b/src/os/bluestore/BitmapAllocator.h @@ -0,0 +1,60 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#ifndef CEPH_OS_BLUESTORE_BITMAPFASTALLOCATOR_H +#define CEPH_OS_BLUESTORE_BITMAPFASTALLOCATOR_H + +#include <mutex> + +#include "Allocator.h" +#include "os/bluestore/bluestore_types.h" +#include "fastbmap_allocator_impl.h" +#include "include/mempool.h" +#include "common/debug.h" + +class BitmapAllocator : public Allocator, + public AllocatorLevel02<AllocatorLevel01Loose> { + CephContext* cct; + +public: + BitmapAllocator(CephContext* _cct, int64_t capacity, int64_t alloc_unit, const std::string& name); + ~BitmapAllocator() override + { + } + + const char* get_type() const override + { + return "bitmap"; + } + int64_t allocate( + uint64_t want_size, uint64_t alloc_unit, uint64_t max_alloc_size, + int64_t hint, PExtentVector *extents) override; + + void release( + const interval_set<uint64_t>& release_set) override; + + using Allocator::release; + + uint64_t get_free() override + { + return get_available(); + } + + void dump() override; + void foreach( + std::function<void(uint64_t offset, uint64_t length)> notify) override + { + foreach_internal(notify); + } + double get_fragmentation() override + { + return get_fragmentation_internal(); + } + + void init_add_free(uint64_t offset, uint64_t length) override; + void init_rm_free(uint64_t offset, uint64_t length) override; + + void shutdown() override; +}; + +#endif diff --git a/src/os/bluestore/BitmapFreelistManager.cc b/src/os/bluestore/BitmapFreelistManager.cc new file mode 100644 index 000000000..315a6bb8c --- /dev/null +++ b/src/os/bluestore/BitmapFreelistManager.cc @@ -0,0 +1,606 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#include "BitmapFreelistManager.h" +#include "kv/KeyValueDB.h" +#include "os/kv.h" +#include "include/stringify.h" + +#include "common/debug.h" + +#define dout_context cct +#define dout_subsys ceph_subsys_bluestore +#undef dout_prefix +#define dout_prefix *_dout << "freelist " + +using std::string; + +using ceph::bufferlist; +using ceph::bufferptr; +using ceph::decode; +using ceph::encode; + +void make_offset_key(uint64_t offset, std::string *key) +{ + key->reserve(10); + _key_encode_u64(offset, key); +} + +struct XorMergeOperator : public KeyValueDB::MergeOperator { + void merge_nonexistent( + const char *rdata, size_t rlen, std::string *new_value) override { + *new_value = std::string(rdata, rlen); + } + void merge( + const char *ldata, size_t llen, + const char *rdata, size_t rlen, + std::string *new_value) override { + ceph_assert(llen == rlen); + *new_value = std::string(ldata, llen); + for (size_t i = 0; i < rlen; ++i) { + (*new_value)[i] ^= rdata[i]; + } + } + // We use each operator name and each prefix to construct the + // overall RocksDB operator name for consistency check at open time. + const char *name() const override { + return "bitwise_xor"; + } +}; + +void BitmapFreelistManager::setup_merge_operator(KeyValueDB *db, string prefix) +{ + std::shared_ptr<XorMergeOperator> merge_op(new XorMergeOperator); + db->set_merge_operator(prefix, merge_op); +} + +BitmapFreelistManager::BitmapFreelistManager(CephContext* cct, + string meta_prefix, + string bitmap_prefix) + : FreelistManager(cct), + meta_prefix(meta_prefix), + bitmap_prefix(bitmap_prefix), + enumerate_bl_pos(0) +{ +} + +int BitmapFreelistManager::create(uint64_t new_size, uint64_t granularity, + KeyValueDB::Transaction txn) +{ + bytes_per_block = granularity; + ceph_assert(isp2(bytes_per_block)); + size = p2align(new_size, bytes_per_block); + blocks_per_key = cct->_conf->bluestore_freelist_blocks_per_key; + + _init_misc(); + + blocks = size_2_block_count(size); + if (blocks * bytes_per_block > size) { + dout(10) << __func__ << " rounding blocks up from 0x" << std::hex << size + << " to 0x" << (blocks * bytes_per_block) + << " (0x" << blocks << " blocks)" << std::dec << dendl; + // set past-eof blocks as allocated + _xor(size, blocks * bytes_per_block - size, txn); + } + dout(1) << __func__ + << " size 0x" << std::hex << size + << " bytes_per_block 0x" << bytes_per_block + << " blocks 0x" << blocks + << " blocks_per_key 0x" << blocks_per_key + << std::dec << dendl; + { + bufferlist bl; + encode(bytes_per_block, bl); + txn->set(meta_prefix, "bytes_per_block", bl); + } + { + bufferlist bl; + encode(blocks_per_key, bl); + txn->set(meta_prefix, "blocks_per_key", bl); + } + { + bufferlist bl; + encode(blocks, bl); + txn->set(meta_prefix, "blocks", bl); + } + { + bufferlist bl; + encode(size, bl); + txn->set(meta_prefix, "size", bl); + } + return 0; +} + +int BitmapFreelistManager::_expand(uint64_t old_size, KeyValueDB* db) +{ + assert(old_size < size); + ceph_assert(isp2(bytes_per_block)); + + KeyValueDB::Transaction txn; + txn = db->get_transaction(); + + auto blocks0 = size_2_block_count(old_size); + if (blocks0 * bytes_per_block > old_size) { + dout(10) << __func__ << " rounding1 blocks up from 0x" << std::hex + << old_size << " to 0x" << (blocks0 * bytes_per_block) + << " (0x" << blocks0 << " blocks)" << std::dec << dendl; + // reset past-eof blocks to unallocated + _xor(old_size, blocks0 * bytes_per_block - old_size, txn); + } + + size = p2align(size, bytes_per_block); + blocks = size_2_block_count(size); + + if (blocks * bytes_per_block > size) { + dout(10) << __func__ << " rounding2 blocks up from 0x" << std::hex + << size << " to 0x" << (blocks * bytes_per_block) + << " (0x" << blocks << " blocks)" << std::dec << dendl; + // set past-eof blocks as allocated + _xor(size, blocks * bytes_per_block - size, txn); + } + + dout(10) << __func__ + << " size 0x" << std::hex << size + << " bytes_per_block 0x" << bytes_per_block + << " blocks 0x" << blocks + << " blocks_per_key 0x" << blocks_per_key + << std::dec << dendl; + { + bufferlist bl; + encode(blocks, bl); + txn->set(meta_prefix, "blocks", bl); + } + { + bufferlist bl; + encode(size, bl); + txn->set(meta_prefix, "size", bl); + } + db->submit_transaction_sync(txn); + + return 0; +} + +int BitmapFreelistManager::read_size_meta_from_db(KeyValueDB* kvdb, + uint64_t* res) +{ + bufferlist v; + int r = kvdb->get(meta_prefix, "size", &v); + if (r < 0) { + derr << __func__ << " missing size meta in DB" << dendl; + return -ENOENT; + } else { + auto p = v.cbegin(); + decode(*res, p); + r = 0; + } + return r; +} + +void BitmapFreelistManager::_load_from_db(KeyValueDB* kvdb) +{ + KeyValueDB::Iterator it = kvdb->get_iterator(meta_prefix); + it->lower_bound(string()); + + // load meta + while (it->valid()) { + string k = it->key(); + if (k == "bytes_per_block") { + bufferlist bl = it->value(); + auto p = bl.cbegin(); + decode(bytes_per_block, p); + dout(10) << __func__ << " bytes_per_block 0x" << std::hex + << bytes_per_block << std::dec << dendl; + } else if (k == "blocks") { + bufferlist bl = it->value(); + auto p = bl.cbegin(); + decode(blocks, p); + dout(10) << __func__ << " blocks 0x" << std::hex << blocks << std::dec + << dendl; + } else if (k == "size") { + bufferlist bl = it->value(); + auto p = bl.cbegin(); + decode(size, p); + dout(10) << __func__ << " size 0x" << std::hex << size << std::dec + << dendl; + } else if (k == "blocks_per_key") { + bufferlist bl = it->value(); + auto p = bl.cbegin(); + decode(blocks_per_key, p); + dout(10) << __func__ << " blocks_per_key 0x" << std::hex << blocks_per_key + << std::dec << dendl; + } else { + derr << __func__ << " unrecognized meta " << k << dendl; + } + it->next(); + } +} + + +int BitmapFreelistManager::init(KeyValueDB *kvdb, bool db_in_read_only, + std::function<int(const std::string&, std::string*)> cfg_reader) +{ + dout(1) << __func__ << dendl; + int r = _read_cfg(cfg_reader); + if (r != 0) { + dout(1) << __func__ << " fall back to legacy meta repo" << dendl; + _load_from_db(kvdb); + } + _sync(kvdb, db_in_read_only); + + dout(10) << __func__ << std::hex + << " size 0x" << size + << " bytes_per_block 0x" << bytes_per_block + << " blocks 0x" << blocks + << " blocks_per_key 0x" << blocks_per_key + << std::dec << dendl; + _init_misc(); + return 0; +} + +int BitmapFreelistManager::_read_cfg( + std::function<int(const std::string&, std::string*)> cfg_reader) +{ + dout(1) << __func__ << dendl; + + string err; + + const size_t key_count = 4; + string keys[key_count] = { + "bfm_size", + "bfm_blocks", + "bfm_bytes_per_block", + "bfm_blocks_per_key"}; + uint64_t* vals[key_count] = { + &size, + &blocks, + &bytes_per_block, + &blocks_per_key}; + + for (size_t i = 0; i < key_count; i++) { + string val; + int r = cfg_reader(keys[i], &val); + if (r == 0) { + *(vals[i]) = strict_iecstrtoll(val.c_str(), &err); + if (!err.empty()) { + derr << __func__ << " Failed to parse - " + << keys[i] << ":" << val + << ", error: " << err << dendl; + return -EINVAL; + } + } else { + // this is expected for legacy deployed OSDs + dout(0) << __func__ << " " << keys[i] << " not found in bdev meta" << dendl; + return r; + } + } + + return 0; +} + +void BitmapFreelistManager::_init_misc() +{ + bufferptr z(blocks_per_key >> 3); + memset(z.c_str(), 0xff, z.length()); + all_set_bl.clear(); + all_set_bl.append(z); + + block_mask = ~(bytes_per_block - 1); + + bytes_per_key = bytes_per_block * blocks_per_key; + key_mask = ~(bytes_per_key - 1); + dout(10) << __func__ << std::hex << " bytes_per_key 0x" << bytes_per_key + << ", key_mask 0x" << key_mask << std::dec + << dendl; +} + +void BitmapFreelistManager::sync(KeyValueDB* kvdb) +{ + _sync(kvdb, true); +} + +void BitmapFreelistManager::_sync(KeyValueDB* kvdb, bool read_only) +{ + dout(10) << __func__ << " checks if size sync is needed" << dendl; + uint64_t size_db = 0; + int r = read_size_meta_from_db(kvdb, &size_db); + ceph_assert(r >= 0); + if (!read_only && size_db < size) { + dout(1) << __func__ << " committing new size 0x" << std::hex << size + << std::dec << dendl; + r = _expand(size_db, kvdb); + ceph_assert(r == 0); + } else if (size_db > size) { + // this might hapen when OSD passed the following sequence: + // upgrade -> downgrade -> expand -> upgrade + // One needs to run expand once again to syncup + dout(1) << __func__ << " fall back to legacy meta repo" << dendl; + _load_from_db(kvdb); + } +} + +void BitmapFreelistManager::shutdown() +{ + dout(1) << __func__ << dendl; +} + +void BitmapFreelistManager::enumerate_reset() +{ + std::lock_guard l(lock); + enumerate_offset = 0; + enumerate_bl_pos = 0; + enumerate_bl.clear(); + enumerate_p.reset(); +} + +int get_next_clear_bit(bufferlist& bl, int start) +{ + const char *p = bl.c_str(); + int bits = bl.length() << 3; + while (start < bits) { + // byte = start / 8 (or start >> 3) + // bit = start % 8 (or start & 7) + unsigned char byte_mask = 1 << (start & 7); + if ((p[start >> 3] & byte_mask) == 0) { + return start; + } + ++start; + } + return -1; // not found +} + +int get_next_set_bit(bufferlist& bl, int start) +{ + const char *p = bl.c_str(); + int bits = bl.length() << 3; + while (start < bits) { + int which_byte = start / 8; + int which_bit = start % 8; + unsigned char byte_mask = 1 << which_bit; + if (p[which_byte] & byte_mask) { + return start; + } + ++start; + } + return -1; // not found +} + +bool BitmapFreelistManager::enumerate_next(KeyValueDB *kvdb, uint64_t *offset, uint64_t *length) +{ + std::lock_guard l(lock); + + // initial base case is a bit awkward + if (enumerate_offset == 0 && enumerate_bl_pos == 0) { + dout(10) << __func__ << " start" << dendl; + enumerate_p = kvdb->get_iterator(bitmap_prefix); + enumerate_p->lower_bound(string()); + // we assert that the first block is always allocated; it's true, + // and it simplifies our lives a bit. + ceph_assert(enumerate_p->valid()); + string k = enumerate_p->key(); + const char *p = k.c_str(); + _key_decode_u64(p, &enumerate_offset); + enumerate_bl = enumerate_p->value(); + ceph_assert(enumerate_offset == 0); + ceph_assert(get_next_set_bit(enumerate_bl, 0) == 0); + } + + if (enumerate_offset >= size) { + dout(10) << __func__ << " end" << dendl; + return false; + } + + // skip set bits to find offset + while (true) { + enumerate_bl_pos = get_next_clear_bit(enumerate_bl, enumerate_bl_pos); + if (enumerate_bl_pos >= 0) { + *offset = _get_offset(enumerate_offset, enumerate_bl_pos); + dout(30) << __func__ << " found clear bit, key 0x" << std::hex + << enumerate_offset << " bit 0x" << enumerate_bl_pos + << " offset 0x" << *offset + << std::dec << dendl; + break; + } + dout(30) << " no more clear bits in 0x" << std::hex << enumerate_offset + << std::dec << dendl; + enumerate_p->next(); + enumerate_bl.clear(); + if (!enumerate_p->valid()) { + enumerate_offset += bytes_per_key; + enumerate_bl_pos = 0; + *offset = _get_offset(enumerate_offset, enumerate_bl_pos); + break; + } + string k = enumerate_p->key(); + const char *p = k.c_str(); + uint64_t next = enumerate_offset + bytes_per_key; + _key_decode_u64(p, &enumerate_offset); + enumerate_bl = enumerate_p->value(); + enumerate_bl_pos = 0; + if (enumerate_offset > next) { + dout(30) << " no key at 0x" << std::hex << next << ", got 0x" + << enumerate_offset << std::dec << dendl; + *offset = next; + break; + } + } + + // skip clear bits to find the end + uint64_t end = 0; + if (enumerate_p->valid()) { + while (true) { + enumerate_bl_pos = get_next_set_bit(enumerate_bl, enumerate_bl_pos); + if (enumerate_bl_pos >= 0) { + end = _get_offset(enumerate_offset, enumerate_bl_pos); + dout(30) << __func__ << " found set bit, key 0x" << std::hex + << enumerate_offset << " bit 0x" << enumerate_bl_pos + << " offset 0x" << end << std::dec + << dendl; + end = std::min(get_alloc_units() * bytes_per_block, end); + *length = end - *offset; + dout(10) << __func__ << std::hex << " 0x" << *offset << "~" << *length + << std::dec << dendl; + return true; + } + dout(30) << " no more set bits in 0x" << std::hex << enumerate_offset + << std::dec << dendl; + enumerate_p->next(); + enumerate_bl.clear(); + enumerate_bl_pos = 0; + if (!enumerate_p->valid()) { + break; + } + string k = enumerate_p->key(); + const char *p = k.c_str(); + _key_decode_u64(p, &enumerate_offset); + enumerate_bl = enumerate_p->value(); + } + } + + if (enumerate_offset < size) { + end = get_alloc_units() * bytes_per_block; + *length = end - *offset; + dout(10) << __func__ << std::hex << " 0x" << *offset << "~" << *length + << std::dec << dendl; + enumerate_offset = size; + enumerate_bl_pos = blocks_per_key; + return true; + } + + dout(10) << __func__ << " end" << dendl; + return false; +} + +void BitmapFreelistManager::dump(KeyValueDB *kvdb) +{ + enumerate_reset(); + uint64_t offset, length; + while (enumerate_next(kvdb, &offset, &length)) { + dout(20) << __func__ << " 0x" << std::hex << offset << "~" << length + << std::dec << dendl; + } +} + +void BitmapFreelistManager::allocate( + uint64_t offset, uint64_t length, + KeyValueDB::Transaction txn) +{ + dout(10) << __func__ << " 0x" << std::hex << offset << "~" << length + << std::dec << dendl; + _xor(offset, length, txn); +} + +void BitmapFreelistManager::release( + uint64_t offset, uint64_t length, + KeyValueDB::Transaction txn) +{ + dout(10) << __func__ << " 0x" << std::hex << offset << "~" << length + << std::dec << dendl; + _xor(offset, length, txn); +} + +void BitmapFreelistManager::_xor( + uint64_t offset, uint64_t length, + KeyValueDB::Transaction txn) +{ + // must be block aligned + ceph_assert((offset & block_mask) == offset); + ceph_assert((length & block_mask) == length); + + uint64_t first_key = offset & key_mask; + uint64_t last_key = (offset + length - 1) & key_mask; + dout(20) << __func__ << " first_key 0x" << std::hex << first_key + << " last_key 0x" << last_key << std::dec << dendl; + + if (first_key == last_key) { + bufferptr p(blocks_per_key >> 3); + p.zero(); + unsigned s = (offset & ~key_mask) / bytes_per_block; + unsigned e = ((offset + length - 1) & ~key_mask) / bytes_per_block; + for (unsigned i = s; i <= e; ++i) { + p[i >> 3] ^= 1ull << (i & 7); + } + string k; + make_offset_key(first_key, &k); + bufferlist bl; + bl.append(p); + dout(30) << __func__ << " 0x" << std::hex << first_key << std::dec << ": "; + bl.hexdump(*_dout, false); + *_dout << dendl; + txn->merge(bitmap_prefix, k, bl); + } else { + // first key + { + bufferptr p(blocks_per_key >> 3); + p.zero(); + unsigned s = (offset & ~key_mask) / bytes_per_block; + unsigned e = blocks_per_key; + for (unsigned i = s; i < e; ++i) { + p[i >> 3] ^= 1ull << (i & 7); + } + string k; + make_offset_key(first_key, &k); + bufferlist bl; + bl.append(p); + dout(30) << __func__ << " 0x" << std::hex << first_key << std::dec << ": "; + bl.hexdump(*_dout, false); + *_dout << dendl; + txn->merge(bitmap_prefix, k, bl); + first_key += bytes_per_key; + } + // middle keys + while (first_key < last_key) { + string k; + make_offset_key(first_key, &k); + dout(30) << __func__ << " 0x" << std::hex << first_key << std::dec + << ": "; + all_set_bl.hexdump(*_dout, false); + *_dout << dendl; + txn->merge(bitmap_prefix, k, all_set_bl); + first_key += bytes_per_key; + } + ceph_assert(first_key == last_key); + { + bufferptr p(blocks_per_key >> 3); + p.zero(); + unsigned e = ((offset + length - 1) & ~key_mask) / bytes_per_block; + for (unsigned i = 0; i <= e; ++i) { + p[i >> 3] ^= 1ull << (i & 7); + } + string k; + make_offset_key(first_key, &k); + bufferlist bl; + bl.append(p); + dout(30) << __func__ << " 0x" << std::hex << first_key << std::dec << ": "; + bl.hexdump(*_dout, false); + *_dout << dendl; + txn->merge(bitmap_prefix, k, bl); + } + } +} + +uint64_t BitmapFreelistManager::size_2_block_count(uint64_t target_size) const +{ + auto target_blocks = target_size / bytes_per_block; + if (target_blocks / blocks_per_key * blocks_per_key != target_blocks) { + target_blocks = (target_blocks / blocks_per_key + 1) * blocks_per_key; + } + return target_blocks; +} + +void BitmapFreelistManager::get_meta( + uint64_t target_size, + std::vector<std::pair<string, string>>* res) const +{ + if (target_size == 0) { + res->emplace_back("bfm_blocks", stringify(blocks)); + res->emplace_back("bfm_size", stringify(size)); + } else { + target_size = p2align(target_size, bytes_per_block); + auto target_blocks = size_2_block_count(target_size); + + res->emplace_back("bfm_blocks", stringify(target_blocks)); + res->emplace_back("bfm_size", stringify(target_size)); + } + res->emplace_back("bfm_bytes_per_block", stringify(bytes_per_block)); + res->emplace_back("bfm_blocks_per_key", stringify(blocks_per_key)); +} diff --git a/src/os/bluestore/BitmapFreelistManager.h b/src/os/bluestore/BitmapFreelistManager.h new file mode 100644 index 000000000..c6bfe469f --- /dev/null +++ b/src/os/bluestore/BitmapFreelistManager.h @@ -0,0 +1,99 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#ifndef CEPH_OS_BLUESTORE_BITMAPFREELISTMANAGER_H +#define CEPH_OS_BLUESTORE_BITMAPFREELISTMANAGER_H + +#include "FreelistManager.h" + +#include <string> +#include <mutex> + +#include "common/ceph_mutex.h" +#include "include/buffer.h" +#include "kv/KeyValueDB.h" + +class BitmapFreelistManager : public FreelistManager { + std::string meta_prefix, bitmap_prefix; + std::shared_ptr<KeyValueDB::MergeOperator> merge_op; + ceph::mutex lock = ceph::make_mutex("BitmapFreelistManager::lock"); + + uint64_t size; ///< size of device (bytes) + uint64_t bytes_per_block; ///< bytes per block (bdev_block_size) + uint64_t blocks_per_key; ///< blocks (bits) per key/value pair + uint64_t bytes_per_key; ///< bytes per key/value pair + uint64_t blocks; ///< size of device (blocks, size rounded up) + + uint64_t block_mask; ///< mask to convert byte offset to block offset + uint64_t key_mask; ///< mask to convert offset to key offset + + ceph::buffer::list all_set_bl; + + KeyValueDB::Iterator enumerate_p; + uint64_t enumerate_offset; ///< logical offset; position + ceph::buffer::list enumerate_bl; ///< current key at enumerate_offset + int enumerate_bl_pos; ///< bit position in enumerate_bl + + uint64_t _get_offset(uint64_t key_off, int bit) { + return key_off + bit * bytes_per_block; + } + + void _init_misc(); + + void _xor( + uint64_t offset, uint64_t length, + KeyValueDB::Transaction txn); + + int _read_cfg( + std::function<int(const std::string&, std::string*)> cfg_reader); + + int _expand(uint64_t new_size, KeyValueDB* db); + + uint64_t size_2_block_count(uint64_t target_size) const; + + int read_size_meta_from_db(KeyValueDB* kvdb, uint64_t* res); + void _sync(KeyValueDB* kvdb, bool read_only); + + void _load_from_db(KeyValueDB* kvdb); + +public: + BitmapFreelistManager(CephContext* cct, std::string meta_prefix, + std::string bitmap_prefix); + + static void setup_merge_operator(KeyValueDB *db, std::string prefix); + + int create(uint64_t size, uint64_t granularity, + KeyValueDB::Transaction txn) override; + + int init(KeyValueDB *kvdb, bool db_in_read_only, + std::function<int(const std::string&, std::string*)> cfg_reader) override; + + void shutdown() override; + void sync(KeyValueDB* kvdb) override; + + void dump(KeyValueDB *kvdb) override; + + void enumerate_reset() override; + bool enumerate_next(KeyValueDB *kvdb, uint64_t *offset, uint64_t *length) override; + + void allocate( + uint64_t offset, uint64_t length, + KeyValueDB::Transaction txn) override; + void release( + uint64_t offset, uint64_t length, + KeyValueDB::Transaction txn) override; + + inline uint64_t get_size() const override { + return size; + } + inline uint64_t get_alloc_units() const override { + return size / bytes_per_block; + } + inline uint64_t get_alloc_size() const override { + return bytes_per_block; + } + void get_meta(uint64_t target_size, + std::vector<std::pair<string, string>>*) const override; +}; + +#endif diff --git a/src/os/bluestore/BlueFS.cc b/src/os/bluestore/BlueFS.cc new file mode 100644 index 000000000..f462fa886 --- /dev/null +++ b/src/os/bluestore/BlueFS.cc @@ -0,0 +1,3903 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#include "boost/algorithm/string.hpp" +#include "bluestore_common.h" +#include "BlueFS.h" + +#include "common/debug.h" +#include "common/errno.h" +#include "common/perf_counters.h" +#include "Allocator.h" +#include "include/ceph_assert.h" +#include "common/admin_socket.h" + +#define dout_context cct +#define dout_subsys ceph_subsys_bluefs +#undef dout_prefix +#define dout_prefix *_dout << "bluefs " +using TOPNSPC::common::cmd_getval; + +using std::byte; +using std::list; +using std::make_pair; +using std::map; +using std::ostream; +using std::pair; +using std::set; +using std::string; +using std::to_string; +using std::vector; + +using ceph::bufferlist; +using ceph::decode; +using ceph::encode; +using ceph::Formatter; + + +MEMPOOL_DEFINE_OBJECT_FACTORY(BlueFS::File, bluefs_file, bluefs); +MEMPOOL_DEFINE_OBJECT_FACTORY(BlueFS::Dir, bluefs_dir, bluefs); +MEMPOOL_DEFINE_OBJECT_FACTORY(BlueFS::FileWriter, bluefs_file_writer, bluefs_file_writer); +MEMPOOL_DEFINE_OBJECT_FACTORY(BlueFS::FileReaderBuffer, + bluefs_file_reader_buffer, bluefs_file_reader); +MEMPOOL_DEFINE_OBJECT_FACTORY(BlueFS::FileReader, bluefs_file_reader, bluefs_file_reader); +MEMPOOL_DEFINE_OBJECT_FACTORY(BlueFS::FileLock, bluefs_file_lock, bluefs); + +static void wal_discard_cb(void *priv, void* priv2) { + BlueFS *bluefs = static_cast<BlueFS*>(priv); + interval_set<uint64_t> *tmp = static_cast<interval_set<uint64_t>*>(priv2); + bluefs->handle_discard(BlueFS::BDEV_WAL, *tmp); +} + +static void db_discard_cb(void *priv, void* priv2) { + BlueFS *bluefs = static_cast<BlueFS*>(priv); + interval_set<uint64_t> *tmp = static_cast<interval_set<uint64_t>*>(priv2); + bluefs->handle_discard(BlueFS::BDEV_DB, *tmp); +} + +static void slow_discard_cb(void *priv, void* priv2) { + BlueFS *bluefs = static_cast<BlueFS*>(priv); + interval_set<uint64_t> *tmp = static_cast<interval_set<uint64_t>*>(priv2); + bluefs->handle_discard(BlueFS::BDEV_SLOW, *tmp); +} + +class BlueFS::SocketHook : public AdminSocketHook { + BlueFS* bluefs; +public: + static BlueFS::SocketHook* create(BlueFS* bluefs) + { + BlueFS::SocketHook* hook = nullptr; + AdminSocket* admin_socket = bluefs->cct->get_admin_socket(); + if (admin_socket) { + hook = new BlueFS::SocketHook(bluefs); + int r = admin_socket->register_command("bluestore bluefs device info " + "name=alloc_size,type=CephInt,req=false", + hook, + "Shows space report for bluefs devices. " + "This also includes an estimation for space " + "available to bluefs at main device. " + "alloc_size, if set, specifies the custom bluefs " + "allocation unit size for the estimation above."); + if (r != 0) { + ldout(bluefs->cct, 1) << __func__ << " cannot register SocketHook" << dendl; + delete hook; + hook = nullptr; + } else { + r = admin_socket->register_command("bluefs stats", + hook, + "Dump internal statistics for bluefs." + ""); + ceph_assert(r == 0); + r = admin_socket->register_command("bluefs files list", hook, + "print files in bluefs"); + ceph_assert(r == 0); + r = admin_socket->register_command("bluefs debug_inject_read_zeros", hook, + "Injects 8K zeros into next BlueFS read. Debug only."); + ceph_assert(r == 0); + } + } + return hook; + } + + ~SocketHook() { + AdminSocket* admin_socket = bluefs->cct->get_admin_socket(); + admin_socket->unregister_commands(this); + } +private: + SocketHook(BlueFS* bluefs) : + bluefs(bluefs) {} + int call(std::string_view command, const cmdmap_t& cmdmap, + Formatter *f, + std::ostream& errss, + bufferlist& out) override { + if (command == "bluestore bluefs device info") { + int64_t alloc_size = 0; + cmd_getval(cmdmap, "alloc_size", alloc_size); + if ((alloc_size & (alloc_size - 1)) != 0) { + errss << "Invalid allocation size:'" << alloc_size << std::endl; + return -EINVAL; + } + if (alloc_size == 0) + alloc_size = bluefs->cct->_conf->bluefs_shared_alloc_size; + f->open_object_section("bluefs_device_info"); + for (unsigned dev = BDEV_WAL; dev <= BDEV_SLOW; dev++) { + if (bluefs->bdev[dev]) { + f->open_object_section("dev"); + f->dump_string("device", bluefs->get_device_name(dev)); + ceph_assert(bluefs->alloc[dev]); + auto total = bluefs->get_total(dev); + auto free = bluefs->get_free(dev); + auto used = bluefs->get_used(dev); + + f->dump_int("total", total); + f->dump_int("free", free); + f->dump_int("bluefs_used", used); + if (bluefs->is_shared_alloc(dev)) { + size_t avail = bluefs->probe_alloc_avail(dev, alloc_size); + f->dump_int("bluefs max available", avail); + } + f->close_section(); + } + } + + f->close_section(); + } else if (command == "bluefs stats") { + std::stringstream ss; + bluefs->dump_block_extents(ss); + bluefs->dump_volume_selector(ss); + out.append(ss); + } else if (command == "bluefs files list") { + const char* devnames[3] = {"wal","db","slow"}; + std::lock_guard l(bluefs->lock); + f->open_array_section("files"); + for (auto &d : bluefs->dir_map) { + std::string dir = d.first; + for (auto &r : d.second->file_map) { + f->open_object_section("file"); + f->dump_string("name", (dir + "/" + r.first).c_str()); + std::vector<size_t> sizes; + sizes.resize(bluefs->bdev.size()); + for(auto& i : r.second->fnode.extents) { + sizes[i.bdev] += i.length; + } + for (size_t i = 0; i < sizes.size(); i++) { + if (sizes[i]>0) { + if (i < sizeof(devnames) / sizeof(*devnames)) + f->dump_int(devnames[i], sizes[i]); + else + f->dump_int(("dev-"+to_string(i)).c_str(), sizes[i]); + } + } + f->close_section(); + } + } + f->close_section(); + f->flush(out); + } else if (command == "bluefs debug_inject_read_zeros") { + bluefs->inject_read_zeros++; + } else { + errss << "Invalid command" << std::endl; + return -ENOSYS; + } + return 0; + } +}; + +BlueFS::BlueFS(CephContext* cct) + : cct(cct), + bdev(MAX_BDEV), + ioc(MAX_BDEV), + block_reserved(MAX_BDEV), + alloc(MAX_BDEV), + alloc_size(MAX_BDEV, 0), + pending_release(MAX_BDEV) +{ + discard_cb[BDEV_WAL] = wal_discard_cb; + discard_cb[BDEV_DB] = db_discard_cb; + discard_cb[BDEV_SLOW] = slow_discard_cb; + asok_hook = SocketHook::create(this); + +} + +BlueFS::~BlueFS() +{ + delete asok_hook; + for (auto p : ioc) { + if (p) + p->aio_wait(); + } + for (auto p : bdev) { + if (p) { + p->close(); + delete p; + } + } + for (auto p : ioc) { + delete p; + } +} + +void BlueFS::_init_logger() +{ + PerfCountersBuilder b(cct, "bluefs", + l_bluefs_first, l_bluefs_last); + b.add_u64(l_bluefs_db_total_bytes, "db_total_bytes", + "Total bytes (main db device)", + "b", PerfCountersBuilder::PRIO_USEFUL, unit_t(UNIT_BYTES)); + b.add_u64(l_bluefs_db_used_bytes, "db_used_bytes", + "Used bytes (main db device)", + "u", PerfCountersBuilder::PRIO_USEFUL, unit_t(UNIT_BYTES)); + b.add_u64(l_bluefs_wal_total_bytes, "wal_total_bytes", + "Total bytes (wal device)", + "walb", PerfCountersBuilder::PRIO_USEFUL, unit_t(UNIT_BYTES)); + b.add_u64(l_bluefs_wal_used_bytes, "wal_used_bytes", + "Used bytes (wal device)", + "walu", PerfCountersBuilder::PRIO_USEFUL, unit_t(UNIT_BYTES)); + b.add_u64(l_bluefs_slow_total_bytes, "slow_total_bytes", + "Total bytes (slow device)", + "slob", PerfCountersBuilder::PRIO_USEFUL, unit_t(UNIT_BYTES)); + b.add_u64(l_bluefs_slow_used_bytes, "slow_used_bytes", + "Used bytes (slow device)", + "slou", PerfCountersBuilder::PRIO_USEFUL, unit_t(UNIT_BYTES)); + b.add_u64(l_bluefs_num_files, "num_files", "File count", + "f", PerfCountersBuilder::PRIO_USEFUL); + b.add_u64(l_bluefs_log_bytes, "log_bytes", "Size of the metadata log", + "jlen", PerfCountersBuilder::PRIO_INTERESTING, unit_t(UNIT_BYTES)); + b.add_u64_counter(l_bluefs_log_compactions, "log_compactions", + "Compactions of the metadata log"); + b.add_u64_counter(l_bluefs_logged_bytes, "logged_bytes", + "Bytes written to the metadata log", "j", + PerfCountersBuilder::PRIO_CRITICAL, unit_t(UNIT_BYTES)); + b.add_u64_counter(l_bluefs_files_written_wal, "files_written_wal", + "Files written to WAL"); + b.add_u64_counter(l_bluefs_files_written_sst, "files_written_sst", + "Files written to SSTs"); + b.add_u64_counter(l_bluefs_bytes_written_wal, "bytes_written_wal", + "Bytes written to WAL", "wal", + PerfCountersBuilder::PRIO_CRITICAL); + b.add_u64_counter(l_bluefs_bytes_written_sst, "bytes_written_sst", + "Bytes written to SSTs", "sst", + PerfCountersBuilder::PRIO_CRITICAL, unit_t(UNIT_BYTES)); + b.add_u64_counter(l_bluefs_bytes_written_slow, "bytes_written_slow", + "Bytes written to WAL/SSTs at slow device", NULL, + PerfCountersBuilder::PRIO_USEFUL, unit_t(UNIT_BYTES)); + b.add_u64_counter(l_bluefs_max_bytes_wal, "max_bytes_wal", + "Maximum bytes allocated from WAL"); + b.add_u64_counter(l_bluefs_max_bytes_db, "max_bytes_db", + "Maximum bytes allocated from DB"); + b.add_u64_counter(l_bluefs_max_bytes_slow, "max_bytes_slow", + "Maximum bytes allocated from SLOW"); + + b.add_u64_counter(l_bluefs_read_random_count, "read_random_count", + "random read requests processed"); + b.add_u64_counter(l_bluefs_read_random_bytes, "read_random_bytes", + "Bytes requested in random read mode", NULL, + PerfCountersBuilder::PRIO_USEFUL, unit_t(UNIT_BYTES)); + b.add_u64_counter(l_bluefs_read_random_disk_count, "read_random_disk_count", + "random reads requests going to disk"); + b.add_u64_counter(l_bluefs_read_random_disk_bytes, "read_random_disk_bytes", + "Bytes read from disk in random read mode", NULL, + PerfCountersBuilder::PRIO_USEFUL, unit_t(UNIT_BYTES)); + b.add_u64_counter(l_bluefs_read_random_buffer_count, "read_random_buffer_count", + "random read requests processed using prefetch buffer"); + b.add_u64_counter(l_bluefs_read_random_buffer_bytes, "read_random_buffer_bytes", + "Bytes read from prefetch buffer in random read mode", NULL, + PerfCountersBuilder::PRIO_USEFUL, unit_t(UNIT_BYTES)); + + b.add_u64_counter(l_bluefs_read_count, "read_count", + "buffered read requests processed"); + b.add_u64_counter(l_bluefs_read_bytes, "read_bytes", + "Bytes requested in buffered read mode", NULL, + PerfCountersBuilder::PRIO_USEFUL, unit_t(UNIT_BYTES)); + + b.add_u64_counter(l_bluefs_read_prefetch_count, "read_prefetch_count", + "prefetch read requests processed"); + b.add_u64_counter(l_bluefs_read_prefetch_bytes, "read_prefetch_bytes", + "Bytes requested in prefetch read mode", NULL, + PerfCountersBuilder::PRIO_USEFUL, unit_t(UNIT_BYTES)); + b.add_u64(l_bluefs_read_zeros_candidate, "read_zeros_candidate", + "How many times bluefs read found page with all 0s"); + b.add_u64(l_bluefs_read_zeros_errors, "read_zeros_errors", + "How many times bluefs read found transient page with all 0s"); + + logger = b.create_perf_counters(); + cct->get_perfcounters_collection()->add(logger); +} + +void BlueFS::_shutdown_logger() +{ + cct->get_perfcounters_collection()->remove(logger); + delete logger; +} + +void BlueFS::_update_logger_stats() +{ + // we must be holding the lock + logger->set(l_bluefs_num_files, file_map.size()); + logger->set(l_bluefs_log_bytes, log_writer->file->fnode.size); + + if (alloc[BDEV_WAL]) { + logger->set(l_bluefs_wal_total_bytes, _get_total(BDEV_WAL)); + logger->set(l_bluefs_wal_used_bytes, _get_used(BDEV_WAL)); + } + if (alloc[BDEV_DB]) { + logger->set(l_bluefs_db_total_bytes, _get_total(BDEV_DB)); + logger->set(l_bluefs_db_used_bytes, _get_used(BDEV_DB)); + } + if (alloc[BDEV_SLOW]) { + logger->set(l_bluefs_slow_total_bytes, _get_total(BDEV_SLOW)); + logger->set(l_bluefs_slow_used_bytes, _get_used(BDEV_SLOW)); + } +} + +int BlueFS::add_block_device(unsigned id, const string& path, bool trim, + uint64_t reserved, + bluefs_shared_alloc_context_t* _shared_alloc) +{ + dout(10) << __func__ << " bdev " << id << " path " << path << " " + << reserved << dendl; + ceph_assert(id < bdev.size()); + ceph_assert(bdev[id] == NULL); + BlockDevice *b = BlockDevice::create(cct, path, NULL, NULL, + discard_cb[id], static_cast<void*>(this)); + block_reserved[id] = reserved; + if (_shared_alloc) { + b->set_no_exclusive_lock(); + } + int r = b->open(path); + if (r < 0) { + delete b; + return r; + } + if (trim) { + b->discard(0, b->get_size()); + } + + dout(1) << __func__ << " bdev " << id << " path " << path + << " size " << byte_u_t(b->get_size()) << dendl; + bdev[id] = b; + ioc[id] = new IOContext(cct, NULL); + if (_shared_alloc) { + ceph_assert(!shared_alloc); + shared_alloc = _shared_alloc; + alloc[id] = shared_alloc->a; + shared_alloc_id = id; + } + return 0; +} + +bool BlueFS::bdev_support_label(unsigned id) +{ + ceph_assert(id < bdev.size()); + ceph_assert(bdev[id]); + return bdev[id]->supported_bdev_label(); +} + +uint64_t BlueFS::get_block_device_size(unsigned id) const +{ + if (id < bdev.size() && bdev[id]) + return bdev[id]->get_size(); + return 0; +} + +void BlueFS::handle_discard(unsigned id, interval_set<uint64_t>& to_release) +{ + dout(10) << __func__ << " bdev " << id << dendl; + ceph_assert(alloc[id]); + alloc[id]->release(to_release); + if (is_shared_alloc(id)) { + shared_alloc->bluefs_used -= to_release.size(); + } +} + +uint64_t BlueFS::get_used() +{ + std::lock_guard l(lock); + uint64_t used = 0; + for (unsigned id = 0; id < MAX_BDEV; ++id) { + used += _get_used(id); + } + return used; +} + +uint64_t BlueFS::_get_used(unsigned id) const +{ + uint64_t used = 0; + if (!alloc[id]) + return 0; + + if (is_shared_alloc(id)) { + used = shared_alloc->bluefs_used; + } else { + used = _get_total(id) - alloc[id]->get_free(); + } + return used; +} + +uint64_t BlueFS::get_used(unsigned id) +{ + ceph_assert(id < alloc.size()); + ceph_assert(alloc[id]); + std::lock_guard l(lock); + return _get_used(id); +} + +uint64_t BlueFS::_get_total(unsigned id) const +{ + ceph_assert(id < bdev.size()); + ceph_assert(id < block_reserved.size()); + return get_block_device_size(id) - block_reserved[id]; +} + +uint64_t BlueFS::get_total(unsigned id) +{ + std::lock_guard l(lock); + return _get_total(id); +} + +uint64_t BlueFS::get_free(unsigned id) +{ + std::lock_guard l(lock); + ceph_assert(id < alloc.size()); + return alloc[id]->get_free(); +} + +void BlueFS::dump_perf_counters(Formatter *f) +{ + f->open_object_section("bluefs_perf_counters"); + logger->dump_formatted(f,0); + f->close_section(); +} + +void BlueFS::dump_block_extents(ostream& out) +{ + for (unsigned i = 0; i < MAX_BDEV; ++i) { + if (!bdev[i]) { + continue; + } + auto total = get_total(i); + auto free = get_free(i); + + out << i << " : device size 0x" << std::hex << total + << " : using 0x" << total - free + << std::dec << "(" << byte_u_t(total - free) << ")"; + out << "\n"; + } +} + +int BlueFS::get_block_extents(unsigned id, interval_set<uint64_t> *extents) +{ + std::lock_guard l(lock); + dout(10) << __func__ << " bdev " << id << dendl; + ceph_assert(id < alloc.size()); + for (auto& p : file_map) { + for (auto& q : p.second->fnode.extents) { + if (q.bdev == id) { + extents->insert(q.offset, q.length); + } + } + } + return 0; +} + +int BlueFS::mkfs(uuid_d osd_uuid, const bluefs_layout_t& layout) +{ + std::unique_lock l(lock); + dout(1) << __func__ + << " osd_uuid " << osd_uuid + << dendl; + + // set volume selector if not provided before/outside + if (vselector == nullptr) { + vselector.reset( + new OriginalVolumeSelector( + get_block_device_size(BlueFS::BDEV_WAL) * 95 / 100, + get_block_device_size(BlueFS::BDEV_DB) * 95 / 100, + get_block_device_size(BlueFS::BDEV_SLOW) * 95 / 100)); + } + + _init_alloc(); + _init_logger(); + + super.version = 1; + super.block_size = bdev[BDEV_DB]->get_block_size(); + super.osd_uuid = osd_uuid; + super.uuid.generate_random(); + dout(1) << __func__ << " uuid " << super.uuid << dendl; + + // init log + FileRef log_file = ceph::make_ref<File>(); + log_file->fnode.ino = 1; + log_file->vselector_hint = vselector->get_hint_for_log(); + int r = _allocate( + vselector->select_prefer_bdev(log_file->vselector_hint), + cct->_conf->bluefs_max_log_runway, + &log_file->fnode); + vselector->add_usage(log_file->vselector_hint, log_file->fnode); + ceph_assert(r == 0); + log_writer = _create_writer(log_file); + + // initial txn + log_t.op_init(); + _flush_and_sync_log(l); + + // write supers + super.log_fnode = log_file->fnode; + super.memorized_layout = layout; + _write_super(BDEV_DB); + flush_bdev(); + + // clean up + super = bluefs_super_t(); + _close_writer(log_writer); + log_writer = NULL; + vselector.reset(nullptr); + _stop_alloc(); + _shutdown_logger(); + if (shared_alloc) { + ceph_assert(shared_alloc->need_init); + shared_alloc->need_init = false; + } + + dout(10) << __func__ << " success" << dendl; + return 0; +} + +void BlueFS::_init_alloc() +{ + dout(20) << __func__ << dendl; + + if (bdev[BDEV_WAL]) { + alloc_size[BDEV_WAL] = cct->_conf->bluefs_alloc_size; + } + if (bdev[BDEV_SLOW]) { + alloc_size[BDEV_DB] = cct->_conf->bluefs_alloc_size; + alloc_size[BDEV_SLOW] = cct->_conf->bluefs_shared_alloc_size; + } else { + alloc_size[BDEV_DB] = cct->_conf->bluefs_shared_alloc_size; + } + // new wal and db devices are never shared + if (bdev[BDEV_NEWWAL]) { + alloc_size[BDEV_NEWWAL] = cct->_conf->bluefs_alloc_size; + } + if (bdev[BDEV_NEWDB]) { + alloc_size[BDEV_NEWDB] = cct->_conf->bluefs_alloc_size; + } + + for (unsigned id = 0; id < bdev.size(); ++id) { + if (!bdev[id]) { + continue; + } + ceph_assert(bdev[id]->get_size()); + ceph_assert(alloc_size[id]); + if (is_shared_alloc(id)) { + dout(1) << __func__ << " shared, id " << id << std::hex + << ", capacity 0x" << bdev[id]->get_size() + << ", block size 0x" << alloc_size[id] + << std::dec << dendl; + } else { + std::string name = "bluefs-"; + const char* devnames[] = { "wal","db","slow" }; + if (id <= BDEV_SLOW) + name += devnames[id]; + else + name += to_string(uintptr_t(this)); + dout(1) << __func__ << " new, id " << id << std::hex + << ", allocator name " << name + << ", allocator type " << cct->_conf->bluefs_allocator + << ", capacity 0x" << bdev[id]->get_size() + << ", block size 0x" << alloc_size[id] + << std::dec << dendl; + alloc[id] = Allocator::create(cct, cct->_conf->bluefs_allocator, + bdev[id]->get_size(), + alloc_size[id], name); + alloc[id]->init_add_free( + block_reserved[id], + _get_total(id)); + } + } +} + +void BlueFS::_stop_alloc() +{ + dout(20) << __func__ << dendl; + for (auto p : bdev) { + if (p) + p->discard_drain(); + } + + for (size_t i = 0; i < alloc.size(); ++i) { + if (alloc[i] && !is_shared_alloc(i)) { + alloc[i]->shutdown(); + delete alloc[i]; + alloc[i] = nullptr; + } + } +} + +int BlueFS::read(uint8_t ndev, uint64_t off, uint64_t len, + ceph::buffer::list *pbl, IOContext *ioc, bool buffered) +{ + dout(10) << __func__ << " dev " << int(ndev) + << ": 0x" << std::hex << off << "~" << len << std::dec + << (buffered ? " buffered" : "") + << dendl; + int r; + bufferlist bl; + r = bdev[ndev]->read(off, len, &bl, ioc, buffered); + if (r != 0) { + return r; + } + uint64_t block_size = bdev[ndev]->get_block_size(); + if (inject_read_zeros) { + if (len >= block_size * 2) { + derr << __func__ << " injecting error, zeros at " + << int(ndev) << ": 0x" << std::hex << (off + len / 2) + << "~" << (block_size * 2) << std::dec << dendl; + //use beginning, replace 8K in the middle with zeros, use tail + bufferlist temp; + bl.splice(0, len / 2 - block_size, &temp); + temp.append(buffer::create(block_size * 2, 0)); + bl.splice(block_size * 2, len / 2 - block_size, &temp); + bl = temp; + inject_read_zeros--; + } + } + //make a check if there is a block with all 0 + uint64_t to_check_len = len; + uint64_t skip = p2nphase(off, block_size); + if (skip >= to_check_len) { + return r; + } + auto it = bl.begin(skip); + to_check_len -= skip; + bool all_zeros = false; + while (all_zeros == false && to_check_len >= block_size) { + // checking 0s step + unsigned block_left = block_size; + unsigned avail; + const char* data; + all_zeros = true; + while (all_zeros && block_left > 0) { + avail = it.get_ptr_and_advance(block_left, &data); + block_left -= avail; + all_zeros = mem_is_zero(data, avail); + } + // skipping step + while (block_left > 0) { + avail = it.get_ptr_and_advance(block_left, &data); + block_left -= avail; + } + to_check_len -= block_size; + } + if (all_zeros) { + logger->inc(l_bluefs_read_zeros_candidate, 1); + bufferlist bl_reread; + r = bdev[ndev]->read(off, len, &bl_reread, ioc, buffered); + if (r != 0) { + return r; + } + // check if both read gave the same + if (!bl.contents_equal(bl_reread)) { + // report problems to log, but continue, maybe it will be good now... + derr << __func__ << " initial read of " << int(ndev) + << ": 0x" << std::hex << off << "~" << len + << std::dec << ": different then re-read " << dendl; + logger->inc(l_bluefs_read_zeros_errors, 1); + } + // use second read will be better if is different + pbl->append(bl_reread); + } else { + pbl->append(bl); + } + return r; +} + +int BlueFS::read_random(uint8_t ndev, uint64_t off, uint64_t len, char *buf, bool buffered) +{ + dout(10) << __func__ << " dev " << int(ndev) + << ": 0x" << std::hex << off << "~" << len << std::dec + << (buffered ? " buffered" : "") + << dendl; + int r; + r = bdev[ndev]->read_random(off, len, buf, buffered); + if (r != 0) { + return r; + } + uint64_t block_size = bdev[ndev]->get_block_size(); + if (inject_read_zeros) { + if (len >= block_size * 2) { + derr << __func__ << " injecting error, zeros at " + << int(ndev) << ": 0x" << std::hex << (off + len / 2) + << "~" << (block_size * 2) << std::dec << dendl; + //zero middle 8K + memset(buf + len / 2 - block_size, 0, block_size * 2); + inject_read_zeros--; + } + } + //make a check if there is a block with all 0 + uint64_t to_check_len = len; + const char* data = buf; + uint64_t skip = p2nphase(off, block_size); + if (skip >= to_check_len) { + return r; + } + to_check_len -= skip; + data += skip; + + bool all_zeros = false; + while (all_zeros == false && to_check_len >= block_size) { + if (mem_is_zero(data, block_size)) { + // at least one block is all zeros + all_zeros = true; + break; + } + data += block_size; + to_check_len -= block_size; + } + if (all_zeros) { + logger->inc(l_bluefs_read_zeros_candidate, 1); + std::unique_ptr<char[]> data_reread(new char[len]); + r = bdev[ndev]->read_random(off, len, &data_reread[0], buffered); + if (r != 0) { + return r; + } + // check if both read gave the same + if (memcmp(buf, &data_reread[0], len) != 0) { + derr << __func__ << " initial read of " << int(ndev) + << ": 0x" << std::hex << off << "~" << len + << std::dec << ": different then re-read " << dendl; + logger->inc(l_bluefs_read_zeros_errors, 1); + // second read is probably better + memcpy(buf, &data_reread[0], len); + } + } + return r; +} + +int BlueFS::mount() +{ + dout(1) << __func__ << dendl; + + int r = _open_super(); + if (r < 0) { + derr << __func__ << " failed to open super: " << cpp_strerror(r) << dendl; + goto out; + } + + // set volume selector if not provided before/outside + if (vselector == nullptr) { + vselector.reset( + new OriginalVolumeSelector( + get_block_device_size(BlueFS::BDEV_WAL) * 95 / 100, + get_block_device_size(BlueFS::BDEV_DB) * 95 / 100, + get_block_device_size(BlueFS::BDEV_SLOW) * 95 / 100)); + } + + _init_alloc(); + _init_logger(); + + r = _replay(false, false); + if (r < 0) { + derr << __func__ << " failed to replay log: " << cpp_strerror(r) << dendl; + _stop_alloc(); + goto out; + } + + // init freelist + for (auto& p : file_map) { + dout(30) << __func__ << " noting alloc for " << p.second->fnode << dendl; + for (auto& q : p.second->fnode.extents) { + bool is_shared = is_shared_alloc(q.bdev); + ceph_assert(!is_shared || (is_shared && shared_alloc)); + if (is_shared && shared_alloc->need_init && shared_alloc->a) { + shared_alloc->bluefs_used += q.length; + alloc[q.bdev]->init_rm_free(q.offset, q.length); + } else if (!is_shared) { + alloc[q.bdev]->init_rm_free(q.offset, q.length); + } + } + } + if (shared_alloc) { + shared_alloc->need_init = false; + dout(1) << __func__ << " shared_bdev_used = " + << shared_alloc->bluefs_used << dendl; + } else { + dout(1) << __func__ << " shared bdev not used" + << dendl; + } + + // set up the log for future writes + log_writer = _create_writer(_get_file(1)); + ceph_assert(log_writer->file->fnode.ino == 1); + log_writer->pos = log_writer->file->fnode.size; + log_writer->file->fnode.reset_delta(); + dout(10) << __func__ << " log write pos set to 0x" + << std::hex << log_writer->pos << std::dec + << dendl; + + return 0; + + out: + super = bluefs_super_t(); + return r; +} + +int BlueFS::maybe_verify_layout(const bluefs_layout_t& layout) const +{ + if (super.memorized_layout) { + if (layout == *super.memorized_layout) { + dout(10) << __func__ << " bluefs layout verified positively" << dendl; + } else { + derr << __func__ << " memorized layout doesn't fit current one" << dendl; + return -EIO; + } + } else { + dout(10) << __func__ << " no memorized_layout in bluefs superblock" + << dendl; + } + + return 0; +} + +void BlueFS::umount(bool avoid_compact) +{ + dout(1) << __func__ << dendl; + + sync_metadata(avoid_compact); + + _close_writer(log_writer); + log_writer = NULL; + + vselector.reset(nullptr); + _stop_alloc(); + file_map.clear(); + dir_map.clear(); + super = bluefs_super_t(); + log_t.clear(); + _shutdown_logger(); +} + +int BlueFS::prepare_new_device(int id, const bluefs_layout_t& layout) +{ + dout(1) << __func__ << dendl; + + if(id == BDEV_NEWDB) { + int new_log_dev_cur = BDEV_WAL; + int new_log_dev_next = BDEV_WAL; + if (!bdev[BDEV_WAL]) { + new_log_dev_cur = BDEV_NEWDB; + new_log_dev_next = BDEV_DB; + } + _rewrite_log_and_layout_sync(false, + BDEV_NEWDB, + new_log_dev_cur, + new_log_dev_next, + RENAME_DB2SLOW, + layout); + //} + } else if(id == BDEV_NEWWAL) { + _rewrite_log_and_layout_sync(false, + BDEV_DB, + BDEV_NEWWAL, + BDEV_WAL, + REMOVE_WAL, + layout); + } else { + assert(false); + } + return 0; +} + +void BlueFS::collect_metadata(map<string,string> *pm, unsigned skip_bdev_id) +{ + if (skip_bdev_id != BDEV_DB && bdev[BDEV_DB]) + bdev[BDEV_DB]->collect_metadata("bluefs_db_", pm); + if (bdev[BDEV_WAL]) + bdev[BDEV_WAL]->collect_metadata("bluefs_wal_", pm); +} + +void BlueFS::get_devices(set<string> *ls) +{ + for (unsigned i = 0; i < MAX_BDEV; ++i) { + if (bdev[i]) { + bdev[i]->get_devices(ls); + } + } +} + +int BlueFS::fsck() +{ + std::lock_guard l(lock); + dout(1) << __func__ << dendl; + // hrm, i think we check everything on mount... + return 0; +} + +int BlueFS::_write_super(int dev) +{ + // build superblock + bufferlist bl; + encode(super, bl); + uint32_t crc = bl.crc32c(-1); + encode(crc, bl); + dout(10) << __func__ << " super block length(encoded): " << bl.length() << dendl; + dout(10) << __func__ << " superblock " << super.version << dendl; + dout(10) << __func__ << " log_fnode " << super.log_fnode << dendl; + ceph_assert_always(bl.length() <= get_super_length()); + bl.append_zero(get_super_length() - bl.length()); + + bdev[dev]->write(get_super_offset(), bl, false, WRITE_LIFE_SHORT); + dout(20) << __func__ << " v " << super.version + << " crc 0x" << std::hex << crc + << " offset 0x" << get_super_offset() << std::dec + << dendl; + return 0; +} + +int BlueFS::_open_super() +{ + dout(10) << __func__ << dendl; + + bufferlist bl; + uint32_t expected_crc, crc; + int r; + + // always the second block + r = bdev[BDEV_DB]->read(get_super_offset(), get_super_length(), + &bl, ioc[BDEV_DB], false); + if (r < 0) + return r; + + auto p = bl.cbegin(); + decode(super, p); + { + bufferlist t; + t.substr_of(bl, 0, p.get_off()); + crc = t.crc32c(-1); + } + decode(expected_crc, p); + if (crc != expected_crc) { + derr << __func__ << " bad crc on superblock, expected 0x" + << std::hex << expected_crc << " != actual 0x" << crc << std::dec + << dendl; + return -EIO; + } + dout(10) << __func__ << " superblock " << super.version << dendl; + dout(10) << __func__ << " log_fnode " << super.log_fnode << dendl; + return 0; +} + +int BlueFS::_check_allocations(const bluefs_fnode_t& fnode, + boost::dynamic_bitset<uint64_t>* used_blocks, + bool is_alloc, //true when allocating, false when deallocating + const char* op_name) +{ + auto& fnode_extents = fnode.extents; + for (auto e : fnode_extents) { + auto id = e.bdev; + bool fail = false; + ceph_assert(id < MAX_BDEV); + if (int r = _verify_alloc_granularity(id, e.offset, e.length, + op_name); r < 0) { + return r; + } + + apply_for_bitset_range(e.offset, e.length, alloc_size[id], used_blocks[id], + [&](uint64_t pos, boost::dynamic_bitset<uint64_t> &bs) { + if (is_alloc == bs.test(pos)) { + fail = true; + } else { + bs.flip(pos); + } + } + ); + if (fail) { + derr << __func__ << " " << op_name << " invalid extent " << int(e.bdev) + << ": 0x" << std::hex << e.offset << "~" << e.length << std::dec + << (is_alloc == true ? + ": duplicate reference, ino " : ": double free, ino ") + << fnode.ino << dendl; + return -EFAULT; + } + } + return 0; +} + +int BlueFS::_verify_alloc_granularity( + __u8 id, uint64_t offset, uint64_t length, const char *op) +{ + if ((offset & (alloc_size[id] - 1)) || + (length & (alloc_size[id] - 1))) { + derr << __func__ << " " << op << " of " << (int)id + << ":0x" << std::hex << offset << "~" << length << std::dec + << " does not align to alloc_size 0x" + << std::hex << alloc_size[id] << std::dec << dendl; + // be helpful + auto need = alloc_size[id]; + while (need && ((offset & (need - 1)) || + (length & (need - 1)))) { + need >>= 1; + } + if (need) { + const char *which; + if (id == BDEV_SLOW || + (id == BDEV_DB && !bdev[BDEV_SLOW])) { + which = "bluefs_shared_alloc_size"; + } else { + which = "bluefs_alloc_size"; + } + derr << "work-around by setting " << which << " = " << need + << " for this OSD" << dendl; + } + return -EFAULT; + } + return 0; +} + +int BlueFS::_replay(bool noop, bool to_stdout) +{ + dout(10) << __func__ << (noop ? " NO-OP" : "") << dendl; + ino_last = 1; // by the log + log_seq = 0; + + FileRef log_file; + log_file = _get_file(1); + + log_file->fnode = super.log_fnode; + if (!noop) { + log_file->vselector_hint = + vselector->get_hint_for_log(); + } else { + // do not use fnode from superblock in 'noop' mode - log_file's one should + // be fine and up-to-date + ceph_assert(log_file->fnode.ino == 1); + ceph_assert(log_file->fnode.extents.size() != 0); + } + dout(10) << __func__ << " log_fnode " << super.log_fnode << dendl; + if (unlikely(to_stdout)) { + std::cout << " log_fnode " << super.log_fnode << std::endl; + } + + FileReader *log_reader = new FileReader( + log_file, cct->_conf->bluefs_max_prefetch, + false, // !random + true); // ignore eof + + bool seen_recs = false; + + boost::dynamic_bitset<uint64_t> used_blocks[MAX_BDEV]; + + if (!noop) { + if (cct->_conf->bluefs_log_replay_check_allocations) { + for (size_t i = 0; i < MAX_BDEV; ++i) { + if (alloc_size[i] != 0 && bdev[i] != nullptr) { + used_blocks[i].resize(round_up_to(bdev[i]->get_size(), alloc_size[i]) / alloc_size[i]); + } + } + // check initial log layout + int r = _check_allocations(log_file->fnode, + used_blocks, true, "Log from super"); + if (r < 0) { + return r; + } + } + } + + while (true) { + ceph_assert((log_reader->buf.pos & ~super.block_mask()) == 0); + uint64_t pos = log_reader->buf.pos; + uint64_t read_pos = pos; + bufferlist bl; + { + int r = _read(log_reader, read_pos, super.block_size, + &bl, NULL); + if (r != (int)super.block_size && cct->_conf->bluefs_replay_recovery) { + r += do_replay_recovery_read(log_reader, pos, read_pos + r, super.block_size - r, &bl); + } + assert(r == (int)super.block_size); + read_pos += r; + } + uint64_t more = 0; + uint64_t seq; + uuid_d uuid; + { + auto p = bl.cbegin(); + __u8 a, b; + uint32_t len; + decode(a, p); + decode(b, p); + decode(len, p); + decode(uuid, p); + decode(seq, p); + if (len + 6 > bl.length()) { + more = round_up_to(len + 6 - bl.length(), super.block_size); + } + } + if (uuid != super.uuid) { + if (seen_recs) { + dout(10) << __func__ << " 0x" << std::hex << pos << std::dec + << ": stop: uuid " << uuid << " != super.uuid " << super.uuid + << dendl; + } else { + derr << __func__ << " 0x" << std::hex << pos << std::dec + << ": stop: uuid " << uuid << " != super.uuid " << super.uuid + << ", block dump: \n"; + bufferlist t; + t.substr_of(bl, 0, super.block_size); + t.hexdump(*_dout); + *_dout << dendl; + } + break; + } + if (seq != log_seq + 1) { + if (seen_recs) { + dout(10) << __func__ << " 0x" << std::hex << pos << std::dec + << ": stop: seq " << seq << " != expected " << log_seq + 1 + << dendl;; + } else { + derr << __func__ << " 0x" << std::hex << pos << std::dec + << ": stop: seq " << seq << " != expected " << log_seq + 1 + << dendl;; + } + break; + } + if (more) { + dout(20) << __func__ << " need 0x" << std::hex << more << std::dec + << " more bytes" << dendl; + bufferlist t; + int r = _read(log_reader, read_pos, more, &t, NULL); + if (r < (int)more) { + dout(10) << __func__ << " 0x" << std::hex << pos + << ": stop: len is 0x" << bl.length() + more << std::dec + << ", which is past eof" << dendl; + if (cct->_conf->bluefs_replay_recovery) { + //try to search for more data + r += do_replay_recovery_read(log_reader, pos, read_pos + r, more - r, &t); + if (r < (int)more) { + //in normal mode we must read r==more, for recovery it is too strict + break; + } + } + } + ceph_assert(r == (int)more); + bl.claim_append(t); + read_pos += r; + } + bluefs_transaction_t t; + try { + auto p = bl.cbegin(); + decode(t, p); + seen_recs = true; + } + catch (ceph::buffer::error& e) { + // Multi-block transactions might be incomplete due to unexpected + // power off. Hence let's treat that as a regular stop condition. + if (seen_recs && more) { + dout(10) << __func__ << " 0x" << std::hex << pos << std::dec + << ": stop: failed to decode: " << e.what() + << dendl; + } else { + derr << __func__ << " 0x" << std::hex << pos << std::dec + << ": stop: failed to decode: " << e.what() + << dendl; + delete log_reader; + return -EIO; + } + break; + } + ceph_assert(seq == t.seq); + dout(10) << __func__ << " 0x" << std::hex << pos << std::dec + << ": " << t << dendl; + if (unlikely(to_stdout)) { + std::cout << " 0x" << std::hex << pos << std::dec + << ": " << t << std::endl; + } + + auto p = t.op_bl.cbegin(); + while (!p.end()) { + __u8 op; + decode(op, p); + switch (op) { + + case bluefs_transaction_t::OP_INIT: + dout(20) << __func__ << " 0x" << std::hex << pos << std::dec + << ": op_init" << dendl; + if (unlikely(to_stdout)) { + std::cout << " 0x" << std::hex << pos << std::dec + << ": op_init" << std::endl; + } + + ceph_assert(t.seq == 1); + break; + + case bluefs_transaction_t::OP_JUMP: + { + uint64_t next_seq; + uint64_t offset; + decode(next_seq, p); + decode(offset, p); + dout(20) << __func__ << " 0x" << std::hex << pos << std::dec + << ": op_jump seq " << next_seq + << " offset 0x" << std::hex << offset << std::dec << dendl; + if (unlikely(to_stdout)) { + std::cout << " 0x" << std::hex << pos << std::dec + << ": op_jump seq " << next_seq + << " offset 0x" << std::hex << offset << std::dec + << std::endl; + } + + ceph_assert(next_seq >= log_seq); + log_seq = next_seq - 1; // we will increment it below + uint64_t skip = offset - read_pos; + if (skip) { + bufferlist junk; + int r = _read(log_reader, read_pos, skip, &junk, + NULL); + if (r != (int)skip) { + dout(10) << __func__ << " 0x" << std::hex << read_pos + << ": stop: failed to skip to " << offset + << std::dec << dendl; + ceph_abort_msg("problem with op_jump"); + } + } + } + break; + + case bluefs_transaction_t::OP_JUMP_SEQ: + { + uint64_t next_seq; + decode(next_seq, p); + dout(20) << __func__ << " 0x" << std::hex << pos << std::dec + << ": op_jump_seq " << next_seq << dendl; + if (unlikely(to_stdout)) { + std::cout << " 0x" << std::hex << pos << std::dec + << ": op_jump_seq " << next_seq << std::endl; + } + + ceph_assert(next_seq >= log_seq); + log_seq = next_seq - 1; // we will increment it below + } + break; + + case bluefs_transaction_t::OP_ALLOC_ADD: + // LEGACY, do nothing but read params + { + __u8 id; + uint64_t offset, length; + decode(id, p); + decode(offset, p); + decode(length, p); + } + break; + + case bluefs_transaction_t::OP_ALLOC_RM: + // LEGACY, do nothing but read params + { + __u8 id; + uint64_t offset, length; + decode(id, p); + decode(offset, p); + decode(length, p); + } + break; + + case bluefs_transaction_t::OP_DIR_LINK: + { + string dirname, filename; + uint64_t ino; + decode(dirname, p); + decode(filename, p); + decode(ino, p); + dout(20) << __func__ << " 0x" << std::hex << pos << std::dec + << ": op_dir_link " << " " << dirname << "/" << filename + << " to " << ino + << dendl; + if (unlikely(to_stdout)) { + std::cout << " 0x" << std::hex << pos << std::dec + << ": op_dir_link " << " " << dirname << "/" << filename + << " to " << ino + << std::endl; + } + + if (!noop) { + FileRef file = _get_file(ino); + ceph_assert(file->fnode.ino); + map<string,DirRef>::iterator q = dir_map.find(dirname); + ceph_assert(q != dir_map.end()); + map<string,FileRef>::iterator r = q->second->file_map.find(filename); + ceph_assert(r == q->second->file_map.end()); + + vselector->sub_usage(file->vselector_hint, file->fnode); + file->vselector_hint = + vselector->get_hint_by_dir(dirname); + vselector->add_usage(file->vselector_hint, file->fnode); + + q->second->file_map[filename] = file; + ++file->refs; + } + } + break; + + case bluefs_transaction_t::OP_DIR_UNLINK: + { + string dirname, filename; + decode(dirname, p); + decode(filename, p); + dout(20) << __func__ << " 0x" << std::hex << pos << std::dec + << ": op_dir_unlink " << " " << dirname << "/" << filename + << dendl; + if (unlikely(to_stdout)) { + std::cout << " 0x" << std::hex << pos << std::dec + << ": op_dir_unlink " << " " << dirname << "/" << filename + << std::endl; + } + + if (!noop) { + map<string,DirRef>::iterator q = dir_map.find(dirname); + ceph_assert(q != dir_map.end()); + map<string,FileRef>::iterator r = q->second->file_map.find(filename); + ceph_assert(r != q->second->file_map.end()); + ceph_assert(r->second->refs > 0); + --r->second->refs; + q->second->file_map.erase(r); + } + } + break; + + case bluefs_transaction_t::OP_DIR_CREATE: + { + string dirname; + decode(dirname, p); + dout(20) << __func__ << " 0x" << std::hex << pos << std::dec + << ": op_dir_create " << dirname << dendl; + if (unlikely(to_stdout)) { + std::cout << " 0x" << std::hex << pos << std::dec + << ": op_dir_create " << dirname << std::endl; + } + + if (!noop) { + map<string,DirRef>::iterator q = dir_map.find(dirname); + ceph_assert(q == dir_map.end()); + dir_map[dirname] = ceph::make_ref<Dir>(); + } + } + break; + + case bluefs_transaction_t::OP_DIR_REMOVE: + { + string dirname; + decode(dirname, p); + dout(20) << __func__ << " 0x" << std::hex << pos << std::dec + << ": op_dir_remove " << dirname << dendl; + if (unlikely(to_stdout)) { + std::cout << " 0x" << std::hex << pos << std::dec + << ": op_dir_remove " << dirname << std::endl; + } + + if (!noop) { + map<string,DirRef>::iterator q = dir_map.find(dirname); + ceph_assert(q != dir_map.end()); + ceph_assert(q->second->file_map.empty()); + dir_map.erase(q); + } + } + break; + + case bluefs_transaction_t::OP_FILE_UPDATE: + { + bluefs_fnode_t fnode; + decode(fnode, p); + dout(20) << __func__ << " 0x" << std::hex << pos << std::dec + << ": op_file_update " << " " << fnode << " " << dendl; + if (unlikely(to_stdout)) { + std::cout << " 0x" << std::hex << pos << std::dec + << ": op_file_update " << " " << fnode << std::endl; + } + if (!noop) { + FileRef f = _get_file(fnode.ino); + if (cct->_conf->bluefs_log_replay_check_allocations) { + int r = _check_allocations(f->fnode, + used_blocks, false, "OP_FILE_UPDATE"); + if (r < 0) { + return r; + } + } + if (fnode.ino != 1) { + vselector->sub_usage(f->vselector_hint, f->fnode); + } + f->fnode = fnode; + if (fnode.ino != 1) { + vselector->add_usage(f->vselector_hint, f->fnode); + } + + if (fnode.ino > ino_last) { + ino_last = fnode.ino; + } + if (cct->_conf->bluefs_log_replay_check_allocations) { + int r = _check_allocations(f->fnode, + used_blocks, true, "OP_FILE_UPDATE"); + if (r < 0) { + return r; + } + } + } else if (noop && fnode.ino == 1) { + FileRef f = _get_file(fnode.ino); + f->fnode = fnode; + } + } + break; + case bluefs_transaction_t::OP_FILE_UPDATE_INC: + { + bluefs_fnode_delta_t delta; + decode(delta, p); + dout(20) << __func__ << " 0x" << std::hex << pos << std::dec + << ": op_file_update_inc " << " " << delta << " " << dendl; + if (unlikely(to_stdout)) { + std::cout << " 0x" << std::hex << pos << std::dec + << ": op_file_update_inc " << " " << delta << std::endl; + } + if (!noop) { + FileRef f = _get_file(delta.ino); + bluefs_fnode_t& fnode = f->fnode; + if (delta.offset != fnode.allocated) { + derr << __func__ << " invalid op_file_update_inc, new extents miss end of file" + << " fnode=" << fnode + << " delta=" << delta + << dendl; + ceph_assert(delta.offset == fnode.allocated); + } + if (cct->_conf->bluefs_log_replay_check_allocations) { + int r = _check_allocations(fnode, + used_blocks, false, "OP_FILE_UPDATE_INC"); + if (r < 0) { + return r; + } + } + + fnode.ino = delta.ino; + fnode.mtime = delta.mtime; + if (fnode.ino != 1) { + vselector->sub_usage(f->vselector_hint, fnode); + } + fnode.size = delta.size; + fnode.claim_extents(delta.extents); + dout(20) << __func__ << " 0x" << std::hex << pos << std::dec + << ": op_file_update_inc produced " << " " << fnode << " " << dendl; + + if (fnode.ino != 1) { + vselector->add_usage(f->vselector_hint, fnode); + } + + if (fnode.ino > ino_last) { + ino_last = fnode.ino; + } + if (cct->_conf->bluefs_log_replay_check_allocations) { + int r = _check_allocations(f->fnode, + used_blocks, true, "OP_FILE_UPDATE_INC"); + if (r < 0) { + return r; + } + } + } else if (noop && delta.ino == 1) { + // we need to track bluefs log, even in noop mode + FileRef f = _get_file(1); + bluefs_fnode_t& fnode = f->fnode; + fnode.ino = delta.ino; + fnode.mtime = delta.mtime; + fnode.size = delta.size; + fnode.claim_extents(delta.extents); + } + } + break; + + case bluefs_transaction_t::OP_FILE_REMOVE: + { + uint64_t ino; + decode(ino, p); + dout(20) << __func__ << " 0x" << std::hex << pos << std::dec + << ": op_file_remove " << ino << dendl; + if (unlikely(to_stdout)) { + std::cout << " 0x" << std::hex << pos << std::dec + << ": op_file_remove " << ino << std::endl; + } + + if (!noop) { + auto p = file_map.find(ino); + ceph_assert(p != file_map.end()); + vselector->sub_usage(p->second->vselector_hint, p->second->fnode); + if (cct->_conf->bluefs_log_replay_check_allocations) { + int r = _check_allocations(p->second->fnode, + used_blocks, false, "OP_FILE_REMOVE"); + if (r < 0) { + return r; + } + } + file_map.erase(p); + } + } + break; + + default: + derr << __func__ << " 0x" << std::hex << pos << std::dec + << ": stop: unrecognized op " << (int)op << dendl; + delete log_reader; + return -EIO; + } + } + ceph_assert(p.end()); + + // we successfully replayed the transaction; bump the seq and log size + ++log_seq; + log_file->fnode.size = log_reader->buf.pos; + } + if (!noop) { + vselector->add_usage(log_file->vselector_hint, log_file->fnode); + } + + dout(10) << __func__ << " log file size was 0x" + << std::hex << log_file->fnode.size << std::dec << dendl; + if (unlikely(to_stdout)) { + std::cout << " log file size was 0x" + << std::hex << log_file->fnode.size << std::dec << std::endl; + } + + delete log_reader; + + if (!noop) { + // verify file link counts are all >0 + for (auto& p : file_map) { + if (p.second->refs == 0 && + p.second->fnode.ino > 1) { + derr << __func__ << " file with link count 0: " << p.second->fnode + << dendl; + return -EIO; + } + } + } + + dout(10) << __func__ << " done" << dendl; + return 0; +} + +int BlueFS::log_dump() +{ + // only dump log file's content + ceph_assert(log_writer == nullptr && "cannot log_dump on mounted BlueFS"); + int r = _open_super(); + if (r < 0) { + derr << __func__ << " failed to open super: " << cpp_strerror(r) << dendl; + return r; + } + _init_logger(); + r = _replay(true, true); + if (r < 0) { + derr << __func__ << " failed to replay log: " << cpp_strerror(r) << dendl; + } + _shutdown_logger(); + super = bluefs_super_t(); + return r; +} + +int BlueFS::device_migrate_to_existing( + CephContext *cct, + const set<int>& devs_source, + int dev_target, + const bluefs_layout_t& layout) +{ + vector<byte> buf; + bool buffered = cct->_conf->bluefs_buffered_io; + + dout(10) << __func__ << " devs_source " << devs_source + << " dev_target " << dev_target << dendl; + assert(dev_target < (int)MAX_BDEV); + + int flags = 0; + flags |= devs_source.count(BDEV_DB) ? + (REMOVE_DB | RENAME_SLOW2DB) : 0; + flags |= devs_source.count(BDEV_WAL) ? REMOVE_WAL : 0; + int dev_target_new = dev_target; + + // Slow device without separate DB one is addressed via BDEV_DB + // Hence need renaming. + if ((flags & REMOVE_DB) && dev_target == BDEV_SLOW) { + dev_target_new = BDEV_DB; + dout(0) << __func__ << " super to be written to " << dev_target << dendl; + } + + for (auto& [ino, file_ref] : file_map) { + //do not copy log + if (file_ref->fnode.ino == 1) { + continue; + } + dout(10) << __func__ << " " << ino << " " << file_ref->fnode << dendl; + + auto& fnode_extents = file_ref->fnode.extents; + + bool rewrite = std::any_of( + fnode_extents.begin(), + fnode_extents.end(), + [=](auto& ext) { + return ext.bdev != dev_target && devs_source.count(ext.bdev); + }); + if (rewrite) { + dout(10) << __func__ << " migrating" << dendl; + + // read entire file + bufferlist bl; + for (auto old_ext : fnode_extents) { + buf.resize(old_ext.length); + int r = bdev[old_ext.bdev]->read_random( + old_ext.offset, + old_ext.length, + (char*)&buf.at(0), + buffered); + if (r != 0) { + derr << __func__ << " failed to read 0x" << std::hex + << old_ext.offset << "~" << old_ext.length << std::dec + << " from " << (int)dev_target << dendl; + return -EIO; + } + bl.append((char*)&buf[0], old_ext.length); + } + + // write entire file + PExtentVector extents; + auto l = _allocate_without_fallback(dev_target, bl.length(), &extents); + if (l < 0) { + derr << __func__ << " unable to allocate len 0x" << std::hex + << bl.length() << std::dec << " from " << (int)dev_target + << ": " << cpp_strerror(l) << dendl; + return -ENOSPC; + } + + uint64_t off = 0; + for (auto& i : extents) { + bufferlist cur; + uint64_t cur_len = std::min<uint64_t>(i.length, bl.length() - off); + ceph_assert(cur_len > 0); + cur.substr_of(bl, off, cur_len); + int r = bdev[dev_target]->write(i.offset, cur, buffered); + ceph_assert(r == 0); + off += cur_len; + } + + // release old extents + for (auto old_ext : fnode_extents) { + PExtentVector to_release; + to_release.emplace_back(old_ext.offset, old_ext.length); + alloc[old_ext.bdev]->release(to_release); + if (is_shared_alloc(old_ext.bdev)) { + shared_alloc->bluefs_used -= to_release.size(); + } + } + + // update fnode + fnode_extents.clear(); + for (auto& i : extents) { + fnode_extents.emplace_back(dev_target_new, i.offset, i.length); + } + } else { + for (auto& ext : fnode_extents) { + if (dev_target != dev_target_new && ext.bdev == dev_target) { + dout(20) << __func__ << " " << " ... adjusting extent 0x" + << std::hex << ext.offset << std::dec + << " bdev " << dev_target << " -> " << dev_target_new + << dendl; + ext.bdev = dev_target_new; + } + } + } + } + // new logging device in the current naming scheme + int new_log_dev_cur = bdev[BDEV_WAL] ? + BDEV_WAL : + bdev[BDEV_DB] ? BDEV_DB : BDEV_SLOW; + + // new logging device in new naming scheme + int new_log_dev_next = new_log_dev_cur; + + if (devs_source.count(new_log_dev_cur)) { + // SLOW device is addressed via BDEV_DB too hence either WAL or DB + new_log_dev_next = (flags & REMOVE_WAL) || !bdev[BDEV_WAL] ? + BDEV_DB : + BDEV_WAL; + + dout(0) << __func__ << " log moved from " << new_log_dev_cur + << " to " << new_log_dev_next << dendl; + + new_log_dev_cur = + (flags & REMOVE_DB) && new_log_dev_next == BDEV_DB ? + BDEV_SLOW : + new_log_dev_next; + } + + _rewrite_log_and_layout_sync( + false, + (flags & REMOVE_DB) ? BDEV_SLOW : BDEV_DB, + new_log_dev_cur, + new_log_dev_next, + flags, + layout); + return 0; +} + +int BlueFS::device_migrate_to_new( + CephContext *cct, + const set<int>& devs_source, + int dev_target, + const bluefs_layout_t& layout) +{ + vector<byte> buf; + bool buffered = cct->_conf->bluefs_buffered_io; + + dout(10) << __func__ << " devs_source " << devs_source + << " dev_target " << dev_target << dendl; + assert(dev_target == (int)BDEV_NEWDB || (int)BDEV_NEWWAL); + + int flags = 0; + + flags |= devs_source.count(BDEV_DB) ? + (!bdev[BDEV_SLOW] ? RENAME_DB2SLOW: REMOVE_DB) : + 0; + flags |= devs_source.count(BDEV_WAL) ? REMOVE_WAL : 0; + int dev_target_new = dev_target; //FIXME: remove, makes no sense + + for (auto& p : file_map) { + //do not copy log + if (p.second->fnode.ino == 1) { + continue; + } + dout(10) << __func__ << " " << p.first << " " << p.second->fnode << dendl; + + auto& fnode_extents = p.second->fnode.extents; + + bool rewrite = false; + for (auto ext_it = fnode_extents.begin(); + ext_it != p.second->fnode.extents.end(); + ++ext_it) { + if (ext_it->bdev != dev_target && devs_source.count(ext_it->bdev)) { + rewrite = true; + break; + } + } + if (rewrite) { + dout(10) << __func__ << " migrating" << dendl; + + // read entire file + bufferlist bl; + for (auto old_ext : fnode_extents) { + buf.resize(old_ext.length); + int r = bdev[old_ext.bdev]->read_random( + old_ext.offset, + old_ext.length, + (char*)&buf.at(0), + buffered); + if (r != 0) { + derr << __func__ << " failed to read 0x" << std::hex + << old_ext.offset << "~" << old_ext.length << std::dec + << " from " << (int)dev_target << dendl; + return -EIO; + } + bl.append((char*)&buf[0], old_ext.length); + } + + // write entire file + PExtentVector extents; + auto l = _allocate_without_fallback(dev_target, bl.length(), &extents); + if (l < 0) { + derr << __func__ << " unable to allocate len 0x" << std::hex + << bl.length() << std::dec << " from " << (int)dev_target + << ": " << cpp_strerror(l) << dendl; + return -ENOSPC; + } + + uint64_t off = 0; + for (auto& i : extents) { + bufferlist cur; + uint64_t cur_len = std::min<uint64_t>(i.length, bl.length() - off); + ceph_assert(cur_len > 0); + cur.substr_of(bl, off, cur_len); + int r = bdev[dev_target]->write(i.offset, cur, buffered); + ceph_assert(r == 0); + off += cur_len; + } + + // release old extents + for (auto old_ext : fnode_extents) { + PExtentVector to_release; + to_release.emplace_back(old_ext.offset, old_ext.length); + alloc[old_ext.bdev]->release(to_release); + if (is_shared_alloc(old_ext.bdev)) { + shared_alloc->bluefs_used -= to_release.size(); + } + } + + // update fnode + fnode_extents.clear(); + for (auto& i : extents) { + fnode_extents.emplace_back(dev_target_new, i.offset, i.length); + } + } + } + // new logging device in the current naming scheme + int new_log_dev_cur = + bdev[BDEV_NEWWAL] ? + BDEV_NEWWAL : + bdev[BDEV_WAL] && !(flags & REMOVE_WAL) ? + BDEV_WAL : + bdev[BDEV_NEWDB] ? + BDEV_NEWDB : + bdev[BDEV_DB] && !(flags & REMOVE_DB)? + BDEV_DB : + BDEV_SLOW; + + // new logging device in new naming scheme + int new_log_dev_next = + new_log_dev_cur == BDEV_NEWWAL ? + BDEV_WAL : + new_log_dev_cur == BDEV_NEWDB ? + BDEV_DB : + new_log_dev_cur; + + int super_dev = + dev_target == BDEV_NEWDB ? + BDEV_NEWDB : + bdev[BDEV_DB] ? + BDEV_DB : + BDEV_SLOW; + + _rewrite_log_and_layout_sync( + false, + super_dev, + new_log_dev_cur, + new_log_dev_next, + flags, + layout); + return 0; +} + +BlueFS::FileRef BlueFS::_get_file(uint64_t ino) +{ + auto p = file_map.find(ino); + if (p == file_map.end()) { + FileRef f = ceph::make_ref<File>(); + file_map[ino] = f; + dout(30) << __func__ << " ino " << ino << " = " << f + << " (new)" << dendl; + return f; + } else { + dout(30) << __func__ << " ino " << ino << " = " << p->second << dendl; + return p->second; + } +} + +void BlueFS::_drop_link(FileRef file) +{ + dout(20) << __func__ << " had refs " << file->refs + << " on " << file->fnode << dendl; + ceph_assert(file->refs > 0); + --file->refs; + if (file->refs == 0) { + dout(20) << __func__ << " destroying " << file->fnode << dendl; + ceph_assert(file->num_reading.load() == 0); + vselector->sub_usage(file->vselector_hint, file->fnode); + log_t.op_file_remove(file->fnode.ino); + for (auto& r : file->fnode.extents) { + pending_release[r.bdev].insert(r.offset, r.length); + } + file_map.erase(file->fnode.ino); + file->deleted = true; + + if (file->dirty_seq) { + ceph_assert(file->dirty_seq > log_seq_stable); + ceph_assert(dirty_files.count(file->dirty_seq)); + auto it = dirty_files[file->dirty_seq].iterator_to(*file); + dirty_files[file->dirty_seq].erase(it); + file->dirty_seq = 0; + } + } +} + +int64_t BlueFS::_read_random( + FileReader *h, ///< [in] read from here + uint64_t off, ///< [in] offset + uint64_t len, ///< [in] this many bytes + char *out) ///< [out] copy it here +{ + auto* buf = &h->buf; + + int64_t ret = 0; + dout(10) << __func__ << " h " << h + << " 0x" << std::hex << off << "~" << len << std::dec + << " from " << h->file->fnode << dendl; + + ++h->file->num_reading; + + if (!h->ignore_eof && + off + len > h->file->fnode.size) { + if (off > h->file->fnode.size) + len = 0; + else + len = h->file->fnode.size - off; + dout(20) << __func__ << " reaching (or past) eof, len clipped to 0x" + << std::hex << len << std::dec << dendl; + } + logger->inc(l_bluefs_read_random_count, 1); + logger->inc(l_bluefs_read_random_bytes, len); + + std::shared_lock s_lock(h->lock); + buf->bl.reassign_to_mempool(mempool::mempool_bluefs_file_reader); + while (len > 0) { + if (off < buf->bl_off || off >= buf->get_buf_end()) { + s_lock.unlock(); + uint64_t x_off = 0; + auto p = h->file->fnode.seek(off, &x_off); + ceph_assert(p != h->file->fnode.extents.end()); + uint64_t l = std::min(p->length - x_off, len); + //hard cap to 1GB + l = std::min(l, uint64_t(1) << 30); + dout(20) << __func__ << " read random 0x" + << std::hex << x_off << "~" << l << std::dec + << " of " << *p << dendl; + int r; + if (!cct->_conf->bluefs_check_for_zeros) { + r = bdev[p->bdev]->read_random(p->offset + x_off, l, out, + cct->_conf->bluefs_buffered_io); + } else { + r = read_random(p->bdev, p->offset + x_off, l, out, + cct->_conf->bluefs_buffered_io); + } + ceph_assert(r == 0); + off += l; + len -= l; + ret += l; + out += l; + + logger->inc(l_bluefs_read_random_disk_count, 1); + logger->inc(l_bluefs_read_random_disk_bytes, l); + if (len > 0) { + s_lock.lock(); + } + } else { + auto left = buf->get_buf_remaining(off); + int64_t r = std::min(len, left); + logger->inc(l_bluefs_read_random_buffer_count, 1); + logger->inc(l_bluefs_read_random_buffer_bytes, r); + dout(20) << __func__ << " left 0x" << std::hex << left + << " 0x" << off << "~" << len << std::dec + << dendl; + + auto p = buf->bl.begin(); + p.seek(off - buf->bl_off); + p.copy(r, out); + out += r; + + dout(30) << __func__ << " result chunk (0x" + << std::hex << r << std::dec << " bytes):\n"; + bufferlist t; + t.substr_of(buf->bl, off - buf->bl_off, r); + t.hexdump(*_dout); + *_dout << dendl; + + off += r; + len -= r; + ret += r; + buf->pos += r; + } + } + dout(20) << __func__ << " got " << ret << dendl; + --h->file->num_reading; + return ret; +} + +int64_t BlueFS::_read( + FileReader *h, ///< [in] read from here + uint64_t off, ///< [in] offset + size_t len, ///< [in] this many bytes + bufferlist *outbl, ///< [out] optional: reference the result here + char *out) ///< [out] optional: or copy it here +{ + FileReaderBuffer *buf = &(h->buf); + + bool prefetch = !outbl && !out; + dout(10) << __func__ << " h " << h + << " 0x" << std::hex << off << "~" << len << std::dec + << " from " << h->file->fnode + << (prefetch ? " prefetch" : "") + << dendl; + + ++h->file->num_reading; + + if (!h->ignore_eof && + off + len > h->file->fnode.size) { + if (off > h->file->fnode.size) + len = 0; + else + len = h->file->fnode.size - off; + dout(20) << __func__ << " reaching (or past) eof, len clipped to 0x" + << std::hex << len << std::dec << dendl; + } + logger->inc(l_bluefs_read_count, 1); + logger->inc(l_bluefs_read_bytes, len); + if (prefetch) { + logger->inc(l_bluefs_read_prefetch_count, 1); + logger->inc(l_bluefs_read_prefetch_bytes, len); + } + + if (outbl) + outbl->clear(); + + int64_t ret = 0; + std::shared_lock s_lock(h->lock); + while (len > 0) { + size_t left; + if (off < buf->bl_off || off >= buf->get_buf_end()) { + s_lock.unlock(); + std::unique_lock u_lock(h->lock); + buf->bl.reassign_to_mempool(mempool::mempool_bluefs_file_reader); + if (off < buf->bl_off || off >= buf->get_buf_end()) { + // if precondition hasn't changed during locking upgrade. + buf->bl.clear(); + buf->bl_off = off & super.block_mask(); + uint64_t x_off = 0; + auto p = h->file->fnode.seek(buf->bl_off, &x_off); + if (p == h->file->fnode.extents.end()) { + dout(5) << __func__ << " reading less then required " + << ret << "<" << ret + len << dendl; + break; + } + + uint64_t want = round_up_to(len + (off & ~super.block_mask()), + super.block_size); + want = std::max(want, buf->max_prefetch); + uint64_t l = std::min(p->length - x_off, want); + //hard cap to 1GB + l = std::min(l, uint64_t(1) << 30); + uint64_t eof_offset = round_up_to(h->file->fnode.size, super.block_size); + if (!h->ignore_eof && + buf->bl_off + l > eof_offset) { + l = eof_offset - buf->bl_off; + } + dout(20) << __func__ << " fetching 0x" + << std::hex << x_off << "~" << l << std::dec + << " of " << *p << dendl; + int r; + // when reading BlueFS log (only happens on startup) use non-buffered io + // it makes it in sync with logic in _flush_range() + bool use_buffered_io = h->file->fnode.ino == 1 ? false : cct->_conf->bluefs_buffered_io; + if (!cct->_conf->bluefs_check_for_zeros) { + r = bdev[p->bdev]->read(p->offset + x_off, l, &buf->bl, ioc[p->bdev], + use_buffered_io); + } else { + r = read(p->bdev, p->offset + x_off, l, &buf->bl, ioc[p->bdev], + use_buffered_io); + } + ceph_assert(r == 0); + } + u_lock.unlock(); + s_lock.lock(); + // we should recheck if buffer is valid after lock downgrade + continue; + } + left = buf->get_buf_remaining(off); + dout(20) << __func__ << " left 0x" << std::hex << left + << " len 0x" << len << std::dec << dendl; + + int64_t r = std::min(len, left); + if (outbl) { + bufferlist t; + t.substr_of(buf->bl, off - buf->bl_off, r); + outbl->claim_append(t); + } + if (out) { + auto p = buf->bl.begin(); + p.seek(off - buf->bl_off); + p.copy(r, out); + out += r; + } + + dout(30) << __func__ << " result chunk (0x" + << std::hex << r << std::dec << " bytes):\n"; + bufferlist t; + t.substr_of(buf->bl, off - buf->bl_off, r); + t.hexdump(*_dout); + *_dout << dendl; + + off += r; + len -= r; + ret += r; + buf->pos += r; + } + + dout(20) << __func__ << " got " << ret << dendl; + ceph_assert(!outbl || (int)outbl->length() == ret); + --h->file->num_reading; + return ret; +} + +void BlueFS::_invalidate_cache(FileRef f, uint64_t offset, uint64_t length) +{ + dout(10) << __func__ << " file " << f->fnode + << " 0x" << std::hex << offset << "~" << length << std::dec + << dendl; + if (offset & ~super.block_mask()) { + offset &= super.block_mask(); + length = round_up_to(length, super.block_size); + } + uint64_t x_off = 0; + auto p = f->fnode.seek(offset, &x_off); + while (length > 0 && p != f->fnode.extents.end()) { + uint64_t x_len = std::min(p->length - x_off, length); + bdev[p->bdev]->invalidate_cache(p->offset + x_off, x_len); + dout(20) << __func__ << " 0x" << std::hex << x_off << "~" << x_len + << std:: dec << " of " << *p << dendl; + offset += x_len; + length -= x_len; + } +} + +uint64_t BlueFS::_estimate_log_size() +{ + int avg_dir_size = 40; // fixme + int avg_file_size = 12; + uint64_t size = 4096 * 2; + size += file_map.size() * (1 + sizeof(bluefs_fnode_t)); + size += dir_map.size() + (1 + avg_dir_size); + size += file_map.size() * (1 + avg_dir_size + avg_file_size); + return round_up_to(size, super.block_size); +} + +void BlueFS::compact_log() +{ + std::unique_lock<ceph::mutex> l(lock); + if (!cct->_conf->bluefs_replay_recovery_disable_compact) { + if (cct->_conf->bluefs_compact_log_sync) { + _compact_log_sync(); + } else { + _compact_log_async(l); + } + } +} + +bool BlueFS::_should_compact_log() +{ + uint64_t current = log_writer->file->fnode.size; + uint64_t expected = _estimate_log_size(); + float ratio = (float)current / (float)expected; + dout(10) << __func__ << " current 0x" << std::hex << current + << " expected " << expected << std::dec + << " ratio " << ratio + << (new_log ? " (async compaction in progress)" : "") + << dendl; + if (new_log || + current < cct->_conf->bluefs_log_compact_min_size || + ratio < cct->_conf->bluefs_log_compact_min_ratio) { + return false; + } + return true; +} + +void BlueFS::_compact_log_dump_metadata(bluefs_transaction_t *t, + int flags) +{ + t->seq = 1; + t->uuid = super.uuid; + dout(20) << __func__ << " op_init" << dendl; + + t->op_init(); + for (auto& [ino, file_ref] : file_map) { + if (ino == 1) + continue; + ceph_assert(ino > 1); + + for(auto& e : file_ref->fnode.extents) { + auto bdev = e.bdev; + auto bdev_new = bdev; + ceph_assert(!((flags & REMOVE_WAL) && bdev == BDEV_WAL)); + if ((flags & RENAME_SLOW2DB) && bdev == BDEV_SLOW) { + bdev_new = BDEV_DB; + } + if ((flags & RENAME_DB2SLOW) && bdev == BDEV_DB) { + bdev_new = BDEV_SLOW; + } + if (bdev == BDEV_NEWDB) { + // REMOVE_DB xor RENAME_DB + ceph_assert(!(flags & REMOVE_DB) != !(flags & RENAME_DB2SLOW)); + ceph_assert(!(flags & RENAME_SLOW2DB)); + bdev_new = BDEV_DB; + } + if (bdev == BDEV_NEWWAL) { + ceph_assert(flags & REMOVE_WAL); + bdev_new = BDEV_WAL; + } + e.bdev = bdev_new; + } + dout(20) << __func__ << " op_file_update " << file_ref->fnode << dendl; + t->op_file_update(file_ref->fnode); + } + for (auto& [path, dir_ref] : dir_map) { + dout(20) << __func__ << " op_dir_create " << path << dendl; + t->op_dir_create(path); + for (auto& [fname, file_ref] : dir_ref->file_map) { + dout(20) << __func__ << " op_dir_link " << path << "/" << fname + << " to " << file_ref->fnode.ino << dendl; + t->op_dir_link(path, fname, file_ref->fnode.ino); + } + } +} + +void BlueFS::_compact_log_sync() +{ + dout(10) << __func__ << dendl; + auto prefer_bdev = + vselector->select_prefer_bdev(log_writer->file->vselector_hint); + _rewrite_log_and_layout_sync(true, + BDEV_DB, + prefer_bdev, + prefer_bdev, + 0, + super.memorized_layout); + logger->inc(l_bluefs_log_compactions); +} + +void BlueFS::_rewrite_log_and_layout_sync(bool allocate_with_fallback, + int super_dev, + int log_dev, + int log_dev_new, + int flags, + std::optional<bluefs_layout_t> layout) +{ + File *log_file = log_writer->file.get(); + + // clear out log (be careful who calls us!!!) + log_t.clear(); + + dout(20) << __func__ << " super_dev:" << super_dev + << " log_dev:" << log_dev + << " log_dev_new:" << log_dev_new + << " flags:" << flags + << dendl; + bluefs_transaction_t t; + _compact_log_dump_metadata(&t, flags); + + dout(20) << __func__ << " op_jump_seq " << log_seq << dendl; + t.op_jump_seq(log_seq); + + bufferlist bl; + encode(t, bl); + _pad_bl(bl); + + uint64_t need = bl.length() + cct->_conf->bluefs_max_log_runway; + dout(20) << __func__ << " need " << need << dendl; + + bluefs_fnode_t old_fnode; + int r; + log_file->fnode.swap_extents(old_fnode); + if (allocate_with_fallback) { + r = _allocate(log_dev, need, &log_file->fnode); + ceph_assert(r == 0); + } else { + PExtentVector extents; + r = _allocate_without_fallback(log_dev, + need, + &extents); + ceph_assert(r == 0); + for (auto& p : extents) { + log_file->fnode.append_extent( + bluefs_extent_t(log_dev, p.offset, p.length)); + } + } + + _close_writer(log_writer); + + // we will write it to super + log_file->fnode.reset_delta(); + log_file->fnode.size = bl.length(); + vselector->sub_usage(log_file->vselector_hint, old_fnode); + vselector->add_usage(log_file->vselector_hint, log_file->fnode); + + log_writer = _create_writer(log_file); + log_writer->append(bl); + r = _flush(log_writer, true); + ceph_assert(r == 0); +#ifdef HAVE_LIBAIO + if (!cct->_conf->bluefs_sync_write) { + list<aio_t> completed_ios; + _claim_completed_aios(log_writer, &completed_ios); + wait_for_aio(log_writer); + completed_ios.clear(); + } +#endif + flush_bdev(); + + super.memorized_layout = layout; + super.log_fnode = log_file->fnode; + // rename device if needed + if (log_dev != log_dev_new) { + dout(10) << __func__ << " renaming log extents to " << log_dev_new << dendl; + for (auto& p : super.log_fnode.extents) { + p.bdev = log_dev_new; + } + } + dout(10) << __func__ << " writing super, log fnode: " << super.log_fnode << dendl; + + ++super.version; + _write_super(super_dev); + flush_bdev(); + + dout(10) << __func__ << " release old log extents " << old_fnode.extents << dendl; + for (auto& r : old_fnode.extents) { + pending_release[r.bdev].insert(r.offset, r.length); + } +} + +/* + * 1. Allocate a new extent to continue the log, and then log an event + * that jumps the log write position to the new extent. At this point, the + * old extent(s) won't be written to, and reflect everything to compact. + * New events will be written to the new region that we'll keep. + * + * 2. While still holding the lock, encode a bufferlist that dumps all of the + * in-memory fnodes and names. This will become the new beginning of the + * log. The last event will jump to the log continuation extent from #1. + * + * 3. Queue a write to a new extent for the new beginnging of the log. + * + * 4. Drop lock and wait + * + * 5. Retake the lock. + * + * 6. Update the log_fnode to splice in the new beginning. + * + * 7. Write the new superblock. + * + * 8. Release the old log space. Clean up. + */ +void BlueFS::_compact_log_async(std::unique_lock<ceph::mutex>& l) +{ + dout(10) << __func__ << dendl; + File *log_file = log_writer->file.get(); + ceph_assert(!new_log); + ceph_assert(!new_log_writer); + + // create a new log [writer] so that we know compaction is in progress + // (see _should_compact_log) + new_log = ceph::make_ref<File>(); + new_log->fnode.ino = 0; // so that _flush_range won't try to log the fnode + + // 0. wait for any racing flushes to complete. (We do not want to block + // in _flush_sync_log with jump_to set or else a racing thread might flush + // our entries and our jump_to update won't be correct.) + while (log_flushing) { + dout(10) << __func__ << " log is currently flushing, waiting" << dendl; + log_cond.wait(l); + } + + vselector->sub_usage(log_file->vselector_hint, log_file->fnode); + + // 1. allocate new log space and jump to it. + old_log_jump_to = log_file->fnode.get_allocated(); + dout(10) << __func__ << " old_log_jump_to 0x" << std::hex << old_log_jump_to + << " need 0x" << (old_log_jump_to + cct->_conf->bluefs_max_log_runway) << std::dec << dendl; + int r = _allocate(vselector->select_prefer_bdev(log_file->vselector_hint), + cct->_conf->bluefs_max_log_runway, + &log_file->fnode); + ceph_assert(r == 0); + //adjust usage as flush below will need it + vselector->add_usage(log_file->vselector_hint, log_file->fnode); + dout(10) << __func__ << " log extents " << log_file->fnode.extents << dendl; + + // update the log file change and log a jump to the offset where we want to + // write the new entries + log_t.op_file_update(log_file->fnode); + log_t.op_jump(log_seq, old_log_jump_to); + + flush_bdev(); // FIXME? + + _flush_and_sync_log(l, 0, old_log_jump_to); + + // 2. prepare compacted log + bluefs_transaction_t t; + //avoid record two times in log_t and _compact_log_dump_metadata. + log_t.clear(); + _compact_log_dump_metadata(&t, 0); + + uint64_t max_alloc_size = std::max(alloc_size[BDEV_WAL], + std::max(alloc_size[BDEV_DB], + alloc_size[BDEV_SLOW])); + + // conservative estimate for final encoded size + new_log_jump_to = round_up_to(t.op_bl.length() + super.block_size * 2, + max_alloc_size); + t.op_jump(log_seq, new_log_jump_to); + + // allocate + //FIXME: check if we want DB here? + r = _allocate(BlueFS::BDEV_DB, new_log_jump_to, + &new_log->fnode); + ceph_assert(r == 0); + + // we might have some more ops in log_t due to _allocate call + t.claim_ops(log_t); + + bufferlist bl; + encode(t, bl); + _pad_bl(bl); + + dout(10) << __func__ << " new_log_jump_to 0x" << std::hex << new_log_jump_to + << std::dec << dendl; + + new_log_writer = _create_writer(new_log); + new_log_writer->append(bl); + + // 3. flush + r = _flush(new_log_writer, true); + ceph_assert(r == 0); + + // 4. wait + _flush_bdev_safely(new_log_writer); + + // 5. update our log fnode + // discard first old_log_jump_to extents + + dout(10) << __func__ << " remove 0x" << std::hex << old_log_jump_to << std::dec + << " of " << log_file->fnode.extents << dendl; + + vselector->sub_usage(log_file->vselector_hint, log_file->fnode); + + uint64_t discarded = 0; + mempool::bluefs::vector<bluefs_extent_t> old_extents; + while (discarded < old_log_jump_to) { + ceph_assert(!log_file->fnode.extents.empty()); + bluefs_extent_t& e = log_file->fnode.extents.front(); + bluefs_extent_t temp = e; + if (discarded + e.length <= old_log_jump_to) { + dout(10) << __func__ << " remove old log extent " << e << dendl; + discarded += e.length; + log_file->fnode.pop_front_extent(); + } else { + dout(10) << __func__ << " remove front of old log extent " << e << dendl; + uint64_t drop = old_log_jump_to - discarded; + temp.length = drop; + e.offset += drop; + e.length -= drop; + discarded += drop; + dout(10) << __func__ << " kept " << e << " removed " << temp << dendl; + } + old_extents.push_back(temp); + } + auto from = log_file->fnode.extents.begin(); + auto to = log_file->fnode.extents.end(); + while (from != to) { + new_log->fnode.append_extent(*from); + ++from; + } + // we will write it to super + new_log->fnode.reset_delta(); + + // clear the extents from old log file, they are added to new log + log_file->fnode.clear_extents(); + // swap the log files. New log file is the log file now. + new_log->fnode.swap_extents(log_file->fnode); + + log_writer->pos = log_writer->file->fnode.size = + log_writer->pos - old_log_jump_to + new_log_jump_to; + + vselector->add_usage(log_file->vselector_hint, log_file->fnode); + + // 6. write the super block to reflect the changes + dout(10) << __func__ << " writing super" << dendl; + super.log_fnode = log_file->fnode; + ++super.version; + _write_super(BDEV_DB); + + lock.unlock(); + flush_bdev(); + lock.lock(); + + // 7. release old space + dout(10) << __func__ << " release old log extents " << old_extents << dendl; + for (auto& r : old_extents) { + pending_release[r.bdev].insert(r.offset, r.length); + } + + // delete the new log, remove from the dirty files list + _close_writer(new_log_writer); + if (new_log->dirty_seq) { + ceph_assert(dirty_files.count(new_log->dirty_seq)); + auto it = dirty_files[new_log->dirty_seq].iterator_to(*new_log); + dirty_files[new_log->dirty_seq].erase(it); + } + new_log_writer = nullptr; + new_log = nullptr; + log_cond.notify_all(); + + dout(10) << __func__ << " log extents " << log_file->fnode.extents << dendl; + logger->inc(l_bluefs_log_compactions); +} + +void BlueFS::_pad_bl(bufferlist& bl) +{ + uint64_t partial = bl.length() % super.block_size; + if (partial) { + dout(10) << __func__ << " padding with 0x" << std::hex + << super.block_size - partial << " zeros" << std::dec << dendl; + bl.append_zero(super.block_size - partial); + } +} + + +int BlueFS::_flush_and_sync_log(std::unique_lock<ceph::mutex>& l, + uint64_t want_seq, + uint64_t jump_to) +{ + while (log_flushing) { + dout(10) << __func__ << " want_seq " << want_seq + << " log is currently flushing, waiting" << dendl; + ceph_assert(!jump_to); + log_cond.wait(l); + } + if (want_seq && want_seq <= log_seq_stable) { + dout(10) << __func__ << " want_seq " << want_seq << " <= log_seq_stable " + << log_seq_stable << ", done" << dendl; + ceph_assert(!jump_to); + return 0; + } + if (log_t.empty() && dirty_files.empty()) { + dout(10) << __func__ << " want_seq " << want_seq + << " " << log_t << " not dirty, dirty_files empty, no-op" << dendl; + ceph_assert(!jump_to); + return 0; + } + + vector<interval_set<uint64_t>> to_release(pending_release.size()); + to_release.swap(pending_release); + + uint64_t seq = log_t.seq = ++log_seq; + ceph_assert(want_seq == 0 || want_seq <= seq); + log_t.uuid = super.uuid; + + // log dirty files + auto lsi = dirty_files.find(seq); + if (lsi != dirty_files.end()) { + dout(20) << __func__ << " " << lsi->second.size() << " dirty_files" << dendl; + for (auto &f : lsi->second) { + dout(20) << __func__ << " op_file_update_inc " << f.fnode << dendl; + log_t.op_file_update_inc(f.fnode); + } + } + + dout(10) << __func__ << " " << log_t << dendl; + ceph_assert(!log_t.empty()); + + // allocate some more space (before we run out)? + // BTW: this triggers `flush()` in the `page_aligned_appender` of `log_writer`. + int64_t runway = log_writer->file->fnode.get_allocated() - + log_writer->get_effective_write_pos(); + bool just_expanded_log = false; + if (runway < (int64_t)cct->_conf->bluefs_min_log_runway) { + dout(10) << __func__ << " allocating more log runway (0x" + << std::hex << runway << std::dec << " remaining)" << dendl; + while (new_log_writer) { + dout(10) << __func__ << " waiting for async compaction" << dendl; + log_cond.wait(l); + } + vselector->sub_usage(log_writer->file->vselector_hint, log_writer->file->fnode); + int r = _allocate( + vselector->select_prefer_bdev(log_writer->file->vselector_hint), + cct->_conf->bluefs_max_log_runway, + &log_writer->file->fnode); + ceph_assert(r == 0); + vselector->add_usage(log_writer->file->vselector_hint, log_writer->file->fnode); + log_t.op_file_update_inc(log_writer->file->fnode); + just_expanded_log = true; + } + + bufferlist bl; + bl.reserve(super.block_size); + encode(log_t, bl); + // pad to block boundary + size_t realign = super.block_size - (bl.length() % super.block_size); + if (realign && realign != super.block_size) + bl.append_zero(realign); + + logger->inc(l_bluefs_logged_bytes, bl.length()); + + if (just_expanded_log) { + ceph_assert(bl.length() <= runway); // if we write this, we will have an unrecoverable data loss + } + + log_writer->append(bl); + + log_t.clear(); + log_t.seq = 0; // just so debug output is less confusing + log_flushing = true; + + int r = _flush(log_writer, true); + ceph_assert(r == 0); + + if (jump_to) { + dout(10) << __func__ << " jumping log offset from 0x" << std::hex + << log_writer->pos << " -> 0x" << jump_to << std::dec << dendl; + log_writer->pos = jump_to; + vselector->sub_usage(log_writer->file->vselector_hint, log_writer->file->fnode.size); + log_writer->file->fnode.size = jump_to; + vselector->add_usage(log_writer->file->vselector_hint, log_writer->file->fnode.size); + } + + _flush_bdev_safely(log_writer); + + log_flushing = false; + log_cond.notify_all(); + + // clean dirty files + if (seq > log_seq_stable) { + log_seq_stable = seq; + dout(20) << __func__ << " log_seq_stable " << log_seq_stable << dendl; + + auto p = dirty_files.begin(); + while (p != dirty_files.end()) { + if (p->first > log_seq_stable) { + dout(20) << __func__ << " done cleaning up dirty files" << dendl; + break; + } + + auto l = p->second.begin(); + while (l != p->second.end()) { + File *file = &*l; + ceph_assert(file->dirty_seq > 0); + ceph_assert(file->dirty_seq <= log_seq_stable); + dout(20) << __func__ << " cleaned file " << file->fnode << dendl; + file->dirty_seq = 0; + p->second.erase(l++); + } + + ceph_assert(p->second.empty()); + dirty_files.erase(p++); + } + } else { + dout(20) << __func__ << " log_seq_stable " << log_seq_stable + << " already >= out seq " << seq + << ", we lost a race against another log flush, done" << dendl; + } + + for (unsigned i = 0; i < to_release.size(); ++i) { + if (!to_release[i].empty()) { + /* OK, now we have the guarantee alloc[i] won't be null. */ + int r = 0; + if (cct->_conf->bdev_enable_discard && cct->_conf->bdev_async_discard) { + r = bdev[i]->queue_discard(to_release[i]); + if (r == 0) + continue; + } else if (cct->_conf->bdev_enable_discard) { + for (auto p = to_release[i].begin(); p != to_release[i].end(); ++p) { + bdev[i]->discard(p.get_start(), p.get_len()); + } + } + alloc[i]->release(to_release[i]); + if (is_shared_alloc(i)) { + shared_alloc->bluefs_used -= to_release[i].size(); + } + } + } + + _update_logger_stats(); + + return 0; +} + +ceph::bufferlist BlueFS::FileWriter::flush_buffer( + CephContext* const cct, + const bool partial, + const unsigned length, + const bluefs_super_t& super) +{ + ceph::bufferlist bl; + if (partial) { + tail_block.splice(0, tail_block.length(), &bl); + } + const auto remaining_len = length - bl.length(); + buffer.splice(0, remaining_len, &bl); + if (buffer.length()) { + dout(20) << " leaving 0x" << std::hex << buffer.length() << std::dec + << " unflushed" << dendl; + } + if (const unsigned tail = bl.length() & ~super.block_mask(); tail) { + const auto padding_len = super.block_size - tail; + dout(20) << __func__ << " caching tail of 0x" + << std::hex << tail + << " and padding block with 0x" << padding_len + << " buffer.length() " << buffer.length() + << std::dec << dendl; + // We need to go through the `buffer_appender` to get a chance to + // preserve in-memory contiguity and not mess with the alignment. + // Otherwise a costly rebuild could happen in e.g. `KernelDevice`. + buffer_appender.append_zero(padding_len); + buffer.splice(buffer.length() - padding_len, padding_len, &bl); + // Deep copy the tail here. This allows to avoid costlier copy on + // bufferlist rebuild in e.g. `KernelDevice` and minimizes number + // of memory allocations. + // The alternative approach would be to place the entire tail and + // padding on a dedicated, 4 KB long memory chunk. This shouldn't + // trigger the rebuild while still being less expensive. + buffer_appender.substr_of(bl, bl.length() - padding_len - tail, tail); + buffer.splice(buffer.length() - tail, tail, &tail_block); + } else { + tail_block.clear(); + } + return bl; +} + +int BlueFS::_signal_dirty_to_log(FileWriter *h) +{ + if (h->file->deleted) { + dout(10) << __func__ << " deleted, no-op" << dendl; + return 0; + } + + h->file->fnode.mtime = ceph_clock_now(); + ceph_assert(h->file->fnode.ino >= 1); + if (h->file->dirty_seq == 0) { + h->file->dirty_seq = log_seq + 1; + dirty_files[h->file->dirty_seq].push_back(*h->file); + dout(20) << __func__ << " dirty_seq = " << log_seq + 1 + << " (was clean)" << dendl; + } else { + if (h->file->dirty_seq != log_seq + 1) { + // need re-dirty, erase from list first + ceph_assert(dirty_files.count(h->file->dirty_seq)); + auto it = dirty_files[h->file->dirty_seq].iterator_to(*h->file); + dirty_files[h->file->dirty_seq].erase(it); + h->file->dirty_seq = log_seq + 1; + dirty_files[h->file->dirty_seq].push_back(*h->file); + dout(20) << __func__ << " dirty_seq = " << log_seq + 1 + << " (was " << h->file->dirty_seq << ")" << dendl; + } else { + dout(20) << __func__ << " dirty_seq = " << log_seq + 1 + << " (unchanged, do nothing) " << dendl; + } + } + return 0; +} + +int BlueFS::_flush_range(FileWriter *h, uint64_t offset, uint64_t length) +{ + dout(10) << __func__ << " " << h << " pos 0x" << std::hex << h->pos + << " 0x" << offset << "~" << length << std::dec + << " to " << h->file->fnode << dendl; + if (h->file->deleted) { + dout(10) << __func__ << " deleted, no-op" << dendl; + return 0; + } + + ceph_assert(h->file->num_readers.load() == 0); + + bool buffered; + if (h->file->fnode.ino == 1) + buffered = false; + else + buffered = cct->_conf->bluefs_buffered_io; + + if (offset + length <= h->pos) + return 0; + if (offset < h->pos) { + length -= h->pos - offset; + offset = h->pos; + dout(10) << " still need 0x" + << std::hex << offset << "~" << length << std::dec + << dendl; + } + ceph_assert(offset <= h->file->fnode.size); + + uint64_t allocated = h->file->fnode.get_allocated(); + vselector->sub_usage(h->file->vselector_hint, h->file->fnode); + // do not bother to dirty the file if we are overwriting + // previously allocated extents. + + if (allocated < offset + length) { + // we should never run out of log space here; see the min runway check + // in _flush_and_sync_log. + ceph_assert(h->file->fnode.ino != 1); + int r = _allocate(vselector->select_prefer_bdev(h->file->vselector_hint), + offset + length - allocated, + &h->file->fnode); + if (r < 0) { + derr << __func__ << " allocated: 0x" << std::hex << allocated + << " offset: 0x" << offset << " length: 0x" << length << std::dec + << dendl; + vselector->add_usage(h->file->vselector_hint, h->file->fnode); // undo + ceph_abort_msg("bluefs enospc"); + return r; + } + h->file->is_dirty = true; + } + if (h->file->fnode.size < offset + length) { + h->file->fnode.size = offset + length; + if (h->file->fnode.ino > 1) { + // we do not need to dirty the log file (or it's compacting + // replacement) when the file size changes because replay is + // smart enough to discover it on its own. + h->file->is_dirty = true; + } + } + dout(20) << __func__ << " file now, unflushed " << h->file->fnode << dendl; + + uint64_t x_off = 0; + auto p = h->file->fnode.seek(offset, &x_off); + ceph_assert(p != h->file->fnode.extents.end()); + dout(20) << __func__ << " in " << *p << " x_off 0x" + << std::hex << x_off << std::dec << dendl; + + unsigned partial = x_off & ~super.block_mask(); + if (partial) { + dout(20) << __func__ << " using partial tail 0x" + << std::hex << partial << std::dec << dendl; + x_off -= partial; + offset -= partial; + length += partial; + dout(20) << __func__ << " waiting for previous aio to complete" << dendl; + for (auto p : h->iocv) { + if (p) { + p->aio_wait(); + } + } + } + + auto bl = h->flush_buffer(cct, partial, length, super); + ceph_assert(bl.length() >= length); + h->pos = offset + length; + length = bl.length(); + + switch (h->writer_type) { + case WRITER_WAL: + logger->inc(l_bluefs_bytes_written_wal, length); + break; + case WRITER_SST: + logger->inc(l_bluefs_bytes_written_sst, length); + break; + } + + dout(30) << "dump:\n"; + bl.hexdump(*_dout); + *_dout << dendl; + + uint64_t bloff = 0; + uint64_t bytes_written_slow = 0; + while (length > 0) { + uint64_t x_len = std::min(p->length - x_off, length); + bufferlist t; + t.substr_of(bl, bloff, x_len); + if (cct->_conf->bluefs_sync_write) { + bdev[p->bdev]->write(p->offset + x_off, t, buffered, h->write_hint); + } else { + bdev[p->bdev]->aio_write(p->offset + x_off, t, h->iocv[p->bdev], buffered, h->write_hint); + } + h->dirty_devs[p->bdev] = true; + if (p->bdev == BDEV_SLOW) { + bytes_written_slow += t.length(); + } + + bloff += x_len; + length -= x_len; + ++p; + x_off = 0; + } + if (bytes_written_slow) { + logger->inc(l_bluefs_bytes_written_slow, bytes_written_slow); + } + for (unsigned i = 0; i < MAX_BDEV; ++i) { + if (bdev[i]) { + if (h->iocv[i] && h->iocv[i]->has_pending_aios()) { + bdev[i]->aio_submit(h->iocv[i]); + } + } + } + vselector->add_usage(h->file->vselector_hint, h->file->fnode); + dout(20) << __func__ << " h " << h << " pos now 0x" + << std::hex << h->pos << std::dec << dendl; + return 0; +} + +#ifdef HAVE_LIBAIO +// we need to retire old completed aios so they don't stick around in +// memory indefinitely (along with their bufferlist refs). +void BlueFS::_claim_completed_aios(FileWriter *h, list<aio_t> *ls) +{ + for (auto p : h->iocv) { + if (p) { + ls->splice(ls->end(), p->running_aios); + } + } + dout(10) << __func__ << " got " << ls->size() << " aios" << dendl; +} + +void BlueFS::wait_for_aio(FileWriter *h) +{ + // NOTE: this is safe to call without a lock, as long as our reference is + // stable. + utime_t start; + lgeneric_subdout(cct, bluefs, 10) << __func__; + start = ceph_clock_now(); + *_dout << " " << h << dendl; + for (auto p : h->iocv) { + if (p) { + p->aio_wait(); + } + } + dout(10) << __func__ << " " << h << " done in " << (ceph_clock_now() - start) << dendl; +} +#endif + +int BlueFS::_flush(FileWriter *h, bool force, std::unique_lock<ceph::mutex>& l) +{ + bool flushed = false; + int r = _flush(h, force, &flushed); + if (r == 0 && flushed) { + _maybe_compact_log(l); + } + return r; +} + +int BlueFS::_flush(FileWriter *h, bool force, bool *flushed) +{ + uint64_t length = h->get_buffer_length(); + uint64_t offset = h->pos; + if (flushed) { + *flushed = false; + } + if (!force && + length < cct->_conf->bluefs_min_flush_size) { + dout(10) << __func__ << " " << h << " ignoring, length " << length + << " < min_flush_size " << cct->_conf->bluefs_min_flush_size + << dendl; + return 0; + } + if (length == 0) { + dout(10) << __func__ << " " << h << " no dirty data on " + << h->file->fnode << dendl; + return 0; + } + dout(10) << __func__ << " " << h << " 0x" + << std::hex << offset << "~" << length << std::dec + << " to " << h->file->fnode << dendl; + ceph_assert(h->pos <= h->file->fnode.size); + int r = _flush_range(h, offset, length); + if (flushed) { + *flushed = true; + } + return r; +} + +int BlueFS::_truncate(FileWriter *h, uint64_t offset) +{ + dout(10) << __func__ << " 0x" << std::hex << offset << std::dec + << " file " << h->file->fnode << dendl; + if (h->file->deleted) { + dout(10) << __func__ << " deleted, no-op" << dendl; + return 0; + } + + // we never truncate internal log files + ceph_assert(h->file->fnode.ino > 1); + + // truncate off unflushed data? + if (h->pos < offset && + h->pos + h->get_buffer_length() > offset) { + dout(20) << __func__ << " tossing out last " << offset - h->pos + << " unflushed bytes" << dendl; + ceph_abort_msg("actually this shouldn't happen"); + } + if (h->get_buffer_length()) { + int r = _flush(h, true); + if (r < 0) + return r; + } + if (offset == h->file->fnode.size) { + return 0; // no-op! + } + if (offset > h->file->fnode.size) { + ceph_abort_msg("truncate up not supported"); + } + ceph_assert(h->file->fnode.size >= offset); + _flush_bdev_safely(h); + vselector->sub_usage(h->file->vselector_hint, h->file->fnode.size); + h->file->fnode.size = offset; + vselector->add_usage(h->file->vselector_hint, h->file->fnode.size); + + log_t.op_file_update_inc(h->file->fnode); + return 0; +} + +int BlueFS::_fsync(FileWriter *h, std::unique_lock<ceph::mutex>& l) +{ + dout(10) << __func__ << " " << h << " " << h->file->fnode << dendl; + int r = _flush(h, true); + if (r < 0) + return r; + if (h->file->is_dirty) { + _signal_dirty_to_log(h); + h->file->is_dirty = false; + } + uint64_t old_dirty_seq = h->file->dirty_seq; + + _flush_bdev_safely(h); + + if (old_dirty_seq) { + uint64_t s = log_seq; + dout(20) << __func__ << " file metadata was dirty (" << old_dirty_seq + << ") on " << h->file->fnode << ", flushing log" << dendl; + _flush_and_sync_log(l, old_dirty_seq); + ceph_assert(h->file->dirty_seq == 0 || // cleaned + h->file->dirty_seq > s); // or redirtied by someone else + } + return 0; +} + +void BlueFS::_flush_bdev_safely(FileWriter *h) +{ + std::array<bool, MAX_BDEV> flush_devs = h->dirty_devs; + h->dirty_devs.fill(false); +#ifdef HAVE_LIBAIO + if (!cct->_conf->bluefs_sync_write) { + list<aio_t> completed_ios; + _claim_completed_aios(h, &completed_ios); + lock.unlock(); + wait_for_aio(h); + completed_ios.clear(); + flush_bdev(flush_devs); + lock.lock(); + } else +#endif + { + lock.unlock(); + flush_bdev(flush_devs); + lock.lock(); + } +} + +void BlueFS::flush_bdev(std::array<bool, MAX_BDEV>& dirty_bdevs) +{ + // NOTE: this is safe to call without a lock. + dout(20) << __func__ << dendl; + for (unsigned i = 0; i < MAX_BDEV; i++) { + if (dirty_bdevs[i]) + bdev[i]->flush(); + } +} + +void BlueFS::flush_bdev() +{ + // NOTE: this is safe to call without a lock. + dout(20) << __func__ << dendl; + for (unsigned i = 0; i < MAX_BDEV; i++) { + // alloc space from BDEV_SLOW is unexpected. + // So most cases we don't alloc from BDEV_SLOW and so avoiding flush not-used device. + if (bdev[i] && (i != BDEV_SLOW || _get_used(i))) { + bdev[i]->flush(); + } + } +} + +const char* BlueFS::get_device_name(unsigned id) +{ + if (id >= MAX_BDEV) return "BDEV_INV"; + const char* names[] = {"BDEV_WAL", "BDEV_DB", "BDEV_SLOW", "BDEV_NEWWAL", "BDEV_NEWDB"}; + return names[id]; +} + +int BlueFS::_allocate_without_fallback(uint8_t id, uint64_t len, + PExtentVector* extents) +{ + dout(10) << __func__ << " len 0x" << std::hex << len << std::dec + << " from " << (int)id << dendl; + assert(id < alloc.size()); + if (!alloc[id]) { + return -ENOENT; + } + extents->reserve(4); // 4 should be (more than) enough for most allocations + int64_t need = round_up_to(len, alloc_size[id]); + int64_t alloc_len = alloc[id]->allocate(need, alloc_size[id], 0, extents); + if (alloc_len < 0 || alloc_len < need) { + if (alloc_len > 0) { + alloc[id]->release(*extents); + } + derr << __func__ << " unable to allocate 0x" << std::hex << need + << " on bdev " << (int)id + << ", allocator name " << alloc[id]->get_name() + << ", allocator type " << alloc[id]->get_type() + << ", capacity 0x" << alloc[id]->get_capacity() + << ", block size 0x" << alloc[id]->get_block_size() + << ", free 0x" << alloc[id]->get_free() + << ", fragmentation " << alloc[id]->get_fragmentation() + << ", allocated 0x" << (alloc_len > 0 ? alloc_len : 0) + << std::dec << dendl; + alloc[id]->dump(); + return -ENOSPC; + } + if (is_shared_alloc(id)) { + shared_alloc->bluefs_used += alloc_len; + } + + return 0; +} + +int BlueFS::_allocate(uint8_t id, uint64_t len, + bluefs_fnode_t* node) +{ + dout(10) << __func__ << " len 0x" << std::hex << len << std::dec + << " from " << (int)id << dendl; + ceph_assert(id < alloc.size()); + int64_t alloc_len = 0; + PExtentVector extents; + uint64_t hint = 0; + int64_t need = len; + if (alloc[id]) { + need = round_up_to(len, alloc_size[id]); + if (!node->extents.empty() && node->extents.back().bdev == id) { + hint = node->extents.back().end(); + } + extents.reserve(4); // 4 should be (more than) enough for most allocations + alloc_len = alloc[id]->allocate(need, alloc_size[id], hint, &extents); + } + if (alloc_len < 0 || alloc_len < need) { + if (alloc[id]) { + if (alloc_len > 0) { + alloc[id]->release(extents); + } + dout(1) << __func__ << " unable to allocate 0x" << std::hex << need + << " on bdev " << (int)id + << ", allocator name " << alloc[id]->get_name() + << ", allocator type " << alloc[id]->get_type() + << ", capacity 0x" << alloc[id]->get_capacity() + << ", block size 0x" << alloc[id]->get_block_size() + << ", free 0x" << alloc[id]->get_free() + << ", fragmentation " << alloc[id]->get_fragmentation() + << ", allocated 0x" << (alloc_len > 0 ? alloc_len : 0) + << std::dec << dendl; + } + + if (id != BDEV_SLOW) { + dout(20) << __func__ << " fallback to bdev " + << (int)id + 1 + << dendl; + return _allocate(id + 1, len, node); + } else { + derr << __func__ << " allocation failed, needed 0x" << std::hex << need + << dendl; + } + return -ENOSPC; + } else { + uint64_t used = _get_used(id); + if (max_bytes[id] < used) { + logger->set(max_bytes_pcounters[id], used); + max_bytes[id] = used; + } + if (is_shared_alloc(id)) { + shared_alloc->bluefs_used += alloc_len; + } + } + + for (auto& p : extents) { + node->append_extent(bluefs_extent_t(id, p.offset, p.length)); + } + + return 0; +} + +int BlueFS::_preallocate(FileRef f, uint64_t off, uint64_t len) +{ + dout(10) << __func__ << " file " << f->fnode << " 0x" + << std::hex << off << "~" << len << std::dec << dendl; + if (f->deleted) { + dout(10) << __func__ << " deleted, no-op" << dendl; + return 0; + } + ceph_assert(f->fnode.ino > 1); + uint64_t allocated = f->fnode.get_allocated(); + if (off + len > allocated) { + uint64_t want = off + len - allocated; + + vselector->sub_usage(f->vselector_hint, f->fnode); + int r = _allocate(vselector->select_prefer_bdev(f->vselector_hint), + want, + &f->fnode); + vselector->add_usage(f->vselector_hint, f->fnode); + if (r < 0) + return r; + log_t.op_file_update_inc(f->fnode); + } + return 0; +} + +void BlueFS::sync_metadata(bool avoid_compact) +{ + std::unique_lock l(lock); + if (log_t.empty() && dirty_files.empty()) { + dout(10) << __func__ << " - no pending log events" << dendl; + } else { + utime_t start; + lgeneric_subdout(cct, bluefs, 10) << __func__; + start = ceph_clock_now(); + *_dout << dendl; + flush_bdev(); // FIXME? + _flush_and_sync_log(l); + dout(10) << __func__ << " done in " << (ceph_clock_now() - start) << dendl; + } + + if (!avoid_compact) { + _maybe_compact_log(l); + } +} + +void BlueFS::_maybe_compact_log(std::unique_lock<ceph::mutex>& l) +{ + if (!cct->_conf->bluefs_replay_recovery_disable_compact && + _should_compact_log()) { + if (cct->_conf->bluefs_compact_log_sync) { + _compact_log_sync(); + } else { + _compact_log_async(l); + } + } +} + +int BlueFS::open_for_write( + std::string_view dirname, + std::string_view filename, + FileWriter **h, + bool overwrite) +{ + std::lock_guard l(lock); + dout(10) << __func__ << " " << dirname << "/" << filename << dendl; + map<string,DirRef>::iterator p = dir_map.find(dirname); + DirRef dir; + if (p == dir_map.end()) { + // implicitly create the dir + dout(20) << __func__ << " dir " << dirname + << " does not exist" << dendl; + return -ENOENT; + } else { + dir = p->second; + } + + FileRef file; + bool create = false; + bool truncate = false; + map<string,FileRef>::iterator q = dir->file_map.find(filename); + if (q == dir->file_map.end()) { + if (overwrite) { + dout(20) << __func__ << " dir " << dirname << " (" << dir + << ") file " << filename + << " does not exist" << dendl; + return -ENOENT; + } + file = ceph::make_ref<File>(); + file->fnode.ino = ++ino_last; + file_map[ino_last] = file; + dir->file_map[string{filename}] = file; + ++file->refs; + create = true; + } else { + // overwrite existing file? + file = q->second; + if (overwrite) { + dout(20) << __func__ << " dir " << dirname << " (" << dir + << ") file " << filename + << " already exists, overwrite in place" << dendl; + } else { + dout(20) << __func__ << " dir " << dirname << " (" << dir + << ") file " << filename + << " already exists, truncate + overwrite" << dendl; + vselector->sub_usage(file->vselector_hint, file->fnode); + file->fnode.size = 0; + for (auto& p : file->fnode.extents) { + pending_release[p.bdev].insert(p.offset, p.length); + } + truncate = true; + + file->fnode.clear_extents(); + } + } + ceph_assert(file->fnode.ino > 1); + + file->fnode.mtime = ceph_clock_now(); + file->vselector_hint = vselector->get_hint_by_dir(dirname); + if (create || truncate) { + vselector->add_usage(file->vselector_hint, file->fnode); // update file count + } + + dout(20) << __func__ << " mapping " << dirname << "/" << filename + << " vsel_hint " << file->vselector_hint + << dendl; + + log_t.op_file_update(file->fnode); + if (create) + log_t.op_dir_link(dirname, filename, file->fnode.ino); + + *h = _create_writer(file); + + if (boost::algorithm::ends_with(filename, ".log")) { + (*h)->writer_type = BlueFS::WRITER_WAL; + if (logger && !overwrite) { + logger->inc(l_bluefs_files_written_wal); + } + } else if (boost::algorithm::ends_with(filename, ".sst")) { + (*h)->writer_type = BlueFS::WRITER_SST; + if (logger) { + logger->inc(l_bluefs_files_written_sst); + } + } + + dout(10) << __func__ << " h " << *h << " on " << file->fnode << dendl; + return 0; +} + +BlueFS::FileWriter *BlueFS::_create_writer(FileRef f) +{ + FileWriter *w = new FileWriter(f); + for (unsigned i = 0; i < MAX_BDEV; ++i) { + if (bdev[i]) { + w->iocv[i] = new IOContext(cct, NULL); + } + } + return w; +} + +void BlueFS::_close_writer(FileWriter *h) +{ + dout(10) << __func__ << " " << h << " type " << h->writer_type << dendl; + //h->buffer.reassign_to_mempool(mempool::mempool_bluefs_file_writer); + for (unsigned i=0; i<MAX_BDEV; ++i) { + if (bdev[i]) { + if (h->iocv[i]) { + h->iocv[i]->aio_wait(); + bdev[i]->queue_reap_ioc(h->iocv[i]); + } + } + } + // sanity + if (h->file->fnode.size >= (1ull << 30)) { + dout(10) << __func__ << " file is unexpectedly large:" << h->file->fnode << dendl; + } + delete h; +} + +uint64_t BlueFS::debug_get_dirty_seq(FileWriter *h) +{ + std::lock_guard l(lock); + return h->file->dirty_seq; +} + +bool BlueFS::debug_get_is_dev_dirty(FileWriter *h, uint8_t dev) +{ + std::lock_guard l(lock); + return h->dirty_devs[dev]; +} + +int BlueFS::open_for_read( + std::string_view dirname, + std::string_view filename, + FileReader **h, + bool random) +{ + std::lock_guard l(lock); + dout(10) << __func__ << " " << dirname << "/" << filename + << (random ? " (random)":" (sequential)") << dendl; + map<string,DirRef>::iterator p = dir_map.find(dirname); + if (p == dir_map.end()) { + dout(20) << __func__ << " dir " << dirname << " not found" << dendl; + return -ENOENT; + } + DirRef dir = p->second; + + map<string,FileRef>::iterator q = dir->file_map.find(filename); + if (q == dir->file_map.end()) { + dout(20) << __func__ << " dir " << dirname << " (" << dir + << ") file " << filename + << " not found" << dendl; + return -ENOENT; + } + File *file = q->second.get(); + + *h = new FileReader(file, random ? 4096 : cct->_conf->bluefs_max_prefetch, + random, false); + dout(10) << __func__ << " h " << *h << " on " << file->fnode << dendl; + return 0; +} + +int BlueFS::rename( + std::string_view old_dirname, std::string_view old_filename, + std::string_view new_dirname, std::string_view new_filename) +{ + std::lock_guard l(lock); + dout(10) << __func__ << " " << old_dirname << "/" << old_filename + << " -> " << new_dirname << "/" << new_filename << dendl; + map<string,DirRef>::iterator p = dir_map.find(old_dirname); + if (p == dir_map.end()) { + dout(20) << __func__ << " dir " << old_dirname << " not found" << dendl; + return -ENOENT; + } + DirRef old_dir = p->second; + map<string,FileRef>::iterator q = old_dir->file_map.find(old_filename); + if (q == old_dir->file_map.end()) { + dout(20) << __func__ << " dir " << old_dirname << " (" << old_dir + << ") file " << old_filename + << " not found" << dendl; + return -ENOENT; + } + FileRef file = q->second; + + p = dir_map.find(new_dirname); + if (p == dir_map.end()) { + dout(20) << __func__ << " dir " << new_dirname << " not found" << dendl; + return -ENOENT; + } + DirRef new_dir = p->second; + q = new_dir->file_map.find(new_filename); + if (q != new_dir->file_map.end()) { + dout(20) << __func__ << " dir " << new_dirname << " (" << old_dir + << ") file " << new_filename + << " already exists, unlinking" << dendl; + ceph_assert(q->second != file); + log_t.op_dir_unlink(new_dirname, new_filename); + _drop_link(q->second); + } + + dout(10) << __func__ << " " << new_dirname << "/" << new_filename << " " + << " " << file->fnode << dendl; + + new_dir->file_map[string{new_filename}] = file; + old_dir->file_map.erase(string{old_filename}); + + log_t.op_dir_link(new_dirname, new_filename, file->fnode.ino); + log_t.op_dir_unlink(old_dirname, old_filename); + return 0; +} + +int BlueFS::mkdir(std::string_view dirname) +{ + std::lock_guard l(lock); + dout(10) << __func__ << " " << dirname << dendl; + map<string,DirRef>::iterator p = dir_map.find(dirname); + if (p != dir_map.end()) { + dout(20) << __func__ << " dir " << dirname << " exists" << dendl; + return -EEXIST; + } + dir_map[string{dirname}] = ceph::make_ref<Dir>(); + log_t.op_dir_create(dirname); + return 0; +} + +int BlueFS::rmdir(std::string_view dirname) +{ + std::lock_guard l(lock); + dout(10) << __func__ << " " << dirname << dendl; + auto p = dir_map.find(dirname); + if (p == dir_map.end()) { + dout(20) << __func__ << " dir " << dirname << " does not exist" << dendl; + return -ENOENT; + } + DirRef dir = p->second; + if (!dir->file_map.empty()) { + dout(20) << __func__ << " dir " << dirname << " not empty" << dendl; + return -ENOTEMPTY; + } + dir_map.erase(string{dirname}); + log_t.op_dir_remove(dirname); + return 0; +} + +bool BlueFS::dir_exists(std::string_view dirname) +{ + std::lock_guard l(lock); + map<string,DirRef>::iterator p = dir_map.find(dirname); + bool exists = p != dir_map.end(); + dout(10) << __func__ << " " << dirname << " = " << (int)exists << dendl; + return exists; +} + +int BlueFS::stat(std::string_view dirname, std::string_view filename, + uint64_t *size, utime_t *mtime) +{ + std::lock_guard l(lock); + dout(10) << __func__ << " " << dirname << "/" << filename << dendl; + map<string,DirRef>::iterator p = dir_map.find(dirname); + if (p == dir_map.end()) { + dout(20) << __func__ << " dir " << dirname << " not found" << dendl; + return -ENOENT; + } + DirRef dir = p->second; + map<string,FileRef>::iterator q = dir->file_map.find(filename); + if (q == dir->file_map.end()) { + dout(20) << __func__ << " dir " << dirname << " (" << dir + << ") file " << filename + << " not found" << dendl; + return -ENOENT; + } + File *file = q->second.get(); + dout(10) << __func__ << " " << dirname << "/" << filename + << " " << file->fnode << dendl; + if (size) + *size = file->fnode.size; + if (mtime) + *mtime = file->fnode.mtime; + return 0; +} + +int BlueFS::lock_file(std::string_view dirname, std::string_view filename, + FileLock **plock) +{ + std::lock_guard l(lock); + dout(10) << __func__ << " " << dirname << "/" << filename << dendl; + map<string,DirRef>::iterator p = dir_map.find(dirname); + if (p == dir_map.end()) { + dout(20) << __func__ << " dir " << dirname << " not found" << dendl; + return -ENOENT; + } + DirRef dir = p->second; + auto q = dir->file_map.find(filename); + FileRef file; + if (q == dir->file_map.end()) { + dout(20) << __func__ << " dir " << dirname << " (" << dir + << ") file " << filename + << " not found, creating" << dendl; + file = ceph::make_ref<File>(); + file->fnode.ino = ++ino_last; + file->fnode.mtime = ceph_clock_now(); + file_map[ino_last] = file; + dir->file_map[string{filename}] = file; + ++file->refs; + log_t.op_file_update(file->fnode); + log_t.op_dir_link(dirname, filename, file->fnode.ino); + } else { + file = q->second; + if (file->locked) { + dout(10) << __func__ << " already locked" << dendl; + return -ENOLCK; + } + } + file->locked = true; + *plock = new FileLock(file); + dout(10) << __func__ << " locked " << file->fnode + << " with " << *plock << dendl; + return 0; +} + +int BlueFS::unlock_file(FileLock *fl) +{ + std::lock_guard l(lock); + dout(10) << __func__ << " " << fl << " on " << fl->file->fnode << dendl; + ceph_assert(fl->file->locked); + fl->file->locked = false; + delete fl; + return 0; +} + +int BlueFS::readdir(std::string_view dirname, vector<string> *ls) +{ + // dirname may contain a trailing / + if (!dirname.empty() && dirname.back() == '/') { + dirname.remove_suffix(1); + } + std::lock_guard l(lock); + dout(10) << __func__ << " " << dirname << dendl; + if (dirname.empty()) { + // list dirs + ls->reserve(dir_map.size() + 2); + for (auto& q : dir_map) { + ls->push_back(q.first); + } + } else { + // list files in dir + map<string,DirRef>::iterator p = dir_map.find(dirname); + if (p == dir_map.end()) { + dout(20) << __func__ << " dir " << dirname << " not found" << dendl; + return -ENOENT; + } + DirRef dir = p->second; + ls->reserve(dir->file_map.size() + 2); + for (auto& q : dir->file_map) { + ls->push_back(q.first); + } + } + ls->push_back("."); + ls->push_back(".."); + return 0; +} + +int BlueFS::unlink(std::string_view dirname, std::string_view filename) +{ + std::lock_guard l(lock); + dout(10) << __func__ << " " << dirname << "/" << filename << dendl; + map<string,DirRef>::iterator p = dir_map.find(dirname); + if (p == dir_map.end()) { + dout(20) << __func__ << " dir " << dirname << " not found" << dendl; + return -ENOENT; + } + DirRef dir = p->second; + map<string,FileRef>::iterator q = dir->file_map.find(filename); + if (q == dir->file_map.end()) { + dout(20) << __func__ << " file " << dirname << "/" << filename + << " not found" << dendl; + return -ENOENT; + } + FileRef file = q->second; + if (file->locked) { + dout(20) << __func__ << " file " << dirname << "/" << filename + << " is locked" << dendl; + return -EBUSY; + } + dir->file_map.erase(string{filename}); + log_t.op_dir_unlink(dirname, filename); + _drop_link(file); + return 0; +} + +bool BlueFS::wal_is_rotational() +{ + if (bdev[BDEV_WAL]) { + return bdev[BDEV_WAL]->is_rotational(); + } else if (bdev[BDEV_DB]) { + return bdev[BDEV_DB]->is_rotational(); + } + return bdev[BDEV_SLOW]->is_rotational(); +} + +/* + Algorithm. + do_replay_recovery_read is used when bluefs log abruptly ends, but it seems that more data should be there. + Idea is to search disk for definiton of extents that will be accompanied with bluefs log in future, + and try if using it will produce healthy bluefs transaction. + We encode already known bluefs log extents and search disk for these bytes. + When we find it, we decode following bytes as extent. + We read that whole extent and then check if merged with existing log part gives a proper bluefs transaction. + */ +int BlueFS::do_replay_recovery_read(FileReader *log_reader, + size_t replay_pos, + size_t read_offset, + size_t read_len, + bufferlist* bl) { + dout(1) << __func__ << " replay_pos=0x" << std::hex << replay_pos << + " needs 0x" << read_offset << "~" << read_len << std::dec << dendl; + + bluefs_fnode_t& log_fnode = log_reader->file->fnode; + bufferlist bin_extents; + ::encode(log_fnode.extents, bin_extents); + dout(2) << __func__ << " log file encoded extents length = " << bin_extents.length() << dendl; + + // cannot process if too small to effectively search + ceph_assert(bin_extents.length() >= 32); + bufferlist last_32; + last_32.substr_of(bin_extents, bin_extents.length() - 32, 32); + + //read fixed part from replay_pos to end of bluefs_log extents + bufferlist fixed; + uint64_t e_off = 0; + auto e = log_fnode.seek(replay_pos, &e_off); + ceph_assert(e != log_fnode.extents.end()); + int r = bdev[e->bdev]->read(e->offset + e_off, e->length - e_off, &fixed, ioc[e->bdev], + cct->_conf->bluefs_buffered_io); + ceph_assert(r == 0); + //capture dev of last good extent + uint8_t last_e_dev = e->bdev; + uint64_t last_e_off = e->offset; + ++e; + while (e != log_fnode.extents.end()) { + r = bdev[e->bdev]->read(e->offset, e->length, &fixed, ioc[e->bdev], + cct->_conf->bluefs_buffered_io); + ceph_assert(r == 0); + last_e_dev = e->bdev; + ++e; + } + ceph_assert(replay_pos + fixed.length() == read_offset); + + dout(2) << __func__ << " valid data in log = " << fixed.length() << dendl; + + struct compare { + bool operator()(const bluefs_extent_t& a, const bluefs_extent_t& b) const { + if (a.bdev < b.bdev) return true; + if (a.offset < b.offset) return true; + return a.length < b.length; + } + }; + std::set<bluefs_extent_t, compare> extents_rejected; + for (int dcnt = 0; dcnt < 3; dcnt++) { + uint8_t dev = (last_e_dev + dcnt) % MAX_BDEV; + if (bdev[dev] == nullptr) continue; + dout(2) << __func__ << " processing " << get_device_name(dev) << dendl; + interval_set<uint64_t> disk_regions; + disk_regions.insert(0, bdev[dev]->get_size()); + for (auto f : file_map) { + auto& e = f.second->fnode.extents; + for (auto& p : e) { + if (p.bdev == dev) { + disk_regions.erase(p.offset, p.length); + } + } + } + size_t disk_regions_count = disk_regions.num_intervals(); + dout(5) << __func__ << " " << disk_regions_count << " regions to scan on " << get_device_name(dev) << dendl; + + auto reg = disk_regions.lower_bound(last_e_off); + //for all except first, start from beginning + last_e_off = 0; + if (reg == disk_regions.end()) { + reg = disk_regions.begin(); + } + const uint64_t chunk_size = 4 * 1024 * 1024; + const uint64_t page_size = 4096; + const uint64_t max_extent_size = 16; + uint64_t overlay_size = last_32.length() + max_extent_size; + for (size_t i = 0; i < disk_regions_count; reg++, i++) { + if (reg == disk_regions.end()) { + reg = disk_regions.begin(); + } + uint64_t pos = reg.get_start(); + uint64_t len = reg.get_len(); + + std::unique_ptr<char[]> raw_data_p{new char[page_size + chunk_size]}; + char* raw_data = raw_data_p.get(); + memset(raw_data, 0, page_size); + + while (len > last_32.length()) { + uint64_t chunk_len = len > chunk_size ? chunk_size : len; + dout(5) << __func__ << " read " + << get_device_name(dev) << ":0x" << std::hex << pos << "+" << chunk_len << std::dec << dendl; + r = bdev[dev]->read_random(pos, chunk_len, raw_data + page_size, cct->_conf->bluefs_buffered_io); + ceph_assert(r == 0); + + //search for fixed_last_32 + char* chunk_b = raw_data + page_size; + char* chunk_e = chunk_b + chunk_len; + + char* search_b = chunk_b - overlay_size; + char* search_e = chunk_e; + + for (char* sp = search_b; ; sp += last_32.length()) { + sp = (char*)memmem(sp, search_e - sp, last_32.c_str(), last_32.length()); + if (sp == nullptr) { + break; + } + + char* n = sp + last_32.length(); + dout(5) << __func__ << " checking location 0x" << std::hex << pos + (n - chunk_b) << std::dec << dendl; + bufferlist test; + test.append(n, std::min<size_t>(max_extent_size, chunk_e - n)); + bluefs_extent_t ne; + try { + bufferlist::const_iterator p = test.begin(); + ::decode(ne, p); + } catch (buffer::error& e) { + continue; + } + if (extents_rejected.count(ne) != 0) { + dout(5) << __func__ << " extent " << ne << " already refected" <<dendl; + continue; + } + //insert as rejected already. if we succeed, it wouldn't make difference. + extents_rejected.insert(ne); + + if (ne.bdev >= MAX_BDEV || + bdev[ne.bdev] == nullptr || + ne.length > 16 * 1024 * 1024 || + (ne.length & 4095) != 0 || + ne.offset + ne.length > bdev[ne.bdev]->get_size() || + (ne.offset & 4095) != 0) { + dout(5) << __func__ << " refusing extent " << ne << dendl; + continue; + } + dout(5) << __func__ << " checking extent " << ne << dendl; + + //read candidate extent - whole + bufferlist candidate; + candidate.append(fixed); + r = bdev[ne.bdev]->read(ne.offset, ne.length, &candidate, ioc[ne.bdev], + cct->_conf->bluefs_buffered_io); + ceph_assert(r == 0); + + //check if transaction & crc is ok + bluefs_transaction_t t; + try { + bufferlist::const_iterator p = candidate.begin(); + ::decode(t, p); + } + catch (buffer::error& e) { + dout(5) << __func__ << " failed match" << dendl; + continue; + } + + //success, it seems a probable candidate + uint64_t l = std::min<uint64_t>(ne.length, read_len); + //trim to required size + bufferlist requested_read; + requested_read.substr_of(candidate, fixed.length(), l); + bl->append(requested_read); + dout(5) << __func__ << " successful extension of log " << l << "/" << read_len << dendl; + log_fnode.append_extent(ne); + log_fnode.recalc_allocated(); + log_reader->buf.pos += l; + return l; + } + //save overlay for next search + memcpy(search_b, chunk_e - overlay_size, overlay_size); + pos += chunk_len; + len -= chunk_len; + } + } + } + return 0; +} + +size_t BlueFS::probe_alloc_avail(int dev, uint64_t alloc_size) +{ + size_t total = 0; + auto iterated_allocation = [&](size_t off, size_t len) { + //only count in size that is alloc_size aligned + size_t dist_to_alignment; + size_t offset_in_block = off & (alloc_size - 1); + if (offset_in_block == 0) + dist_to_alignment = 0; + else + dist_to_alignment = alloc_size - offset_in_block; + if (dist_to_alignment >= len) + return; + len -= dist_to_alignment; + total += p2align(len, alloc_size); + }; + if (alloc[dev]) { + alloc[dev]->foreach(iterated_allocation); + } + return total; +} +// =============================================== +// OriginalVolumeSelector + +void* OriginalVolumeSelector::get_hint_for_log() const { + return reinterpret_cast<void*>(BlueFS::BDEV_WAL); +} +void* OriginalVolumeSelector::get_hint_by_dir(std::string_view dirname) const { + uint8_t res = BlueFS::BDEV_DB; + if (dirname.length() > 5) { + // the "db.slow" and "db.wal" directory names are hard-coded at + // match up with bluestore. the slow device is always the second + // one (when a dedicated block.db device is present and used at + // bdev 0). the wal device is always last. + if (boost::algorithm::ends_with(dirname, ".slow") && slow_total) { + res = BlueFS::BDEV_SLOW; + } else if (boost::algorithm::ends_with(dirname, ".wal") && wal_total) { + res = BlueFS::BDEV_WAL; + } + } + return reinterpret_cast<void*>(res); +} + +uint8_t OriginalVolumeSelector::select_prefer_bdev(void* hint) +{ + return (uint8_t)(reinterpret_cast<uint64_t>(hint)); +} + +void OriginalVolumeSelector::get_paths(const std::string& base, paths& res) const +{ + res.emplace_back(base, db_total); + res.emplace_back(base + ".slow", + slow_total ? slow_total : db_total); // use fake non-zero value if needed to + // avoid RocksDB complains +} + +#undef dout_prefix +#define dout_prefix *_dout << "OriginalVolumeSelector: " + +void OriginalVolumeSelector::dump(ostream& sout) { + sout<< "wal_total:" << wal_total + << ", db_total:" << db_total + << ", slow_total:" << slow_total + << std::endl; +} + +// =============================================== +// FitToFastVolumeSelector + +void FitToFastVolumeSelector::get_paths(const std::string& base, paths& res) const { + res.emplace_back(base, 1); // size of the last db_path has no effect +} diff --git a/src/os/bluestore/BlueFS.h b/src/os/bluestore/BlueFS.h new file mode 100644 index 000000000..988c7e37f --- /dev/null +++ b/src/os/bluestore/BlueFS.h @@ -0,0 +1,707 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab +#ifndef CEPH_OS_BLUESTORE_BLUEFS_H +#define CEPH_OS_BLUESTORE_BLUEFS_H + +#include <atomic> +#include <mutex> +#include <limits> + +#include "bluefs_types.h" +#include "blk/BlockDevice.h" + +#include "common/RefCountedObj.h" +#include "common/ceph_context.h" +#include "global/global_context.h" +#include "include/common_fwd.h" + +#include "boost/intrusive/list.hpp" +#include "boost/dynamic_bitset.hpp" + +class Allocator; + +enum { + l_bluefs_first = 732600, + l_bluefs_db_total_bytes, + l_bluefs_db_used_bytes, + l_bluefs_wal_total_bytes, + l_bluefs_wal_used_bytes, + l_bluefs_slow_total_bytes, + l_bluefs_slow_used_bytes, + l_bluefs_num_files, + l_bluefs_log_bytes, + l_bluefs_log_compactions, + l_bluefs_logged_bytes, + l_bluefs_files_written_wal, + l_bluefs_files_written_sst, + l_bluefs_bytes_written_wal, + l_bluefs_bytes_written_sst, + l_bluefs_bytes_written_slow, + l_bluefs_max_bytes_wal, + l_bluefs_max_bytes_db, + l_bluefs_max_bytes_slow, + l_bluefs_read_random_count, + l_bluefs_read_random_bytes, + l_bluefs_read_random_disk_count, + l_bluefs_read_random_disk_bytes, + l_bluefs_read_random_buffer_count, + l_bluefs_read_random_buffer_bytes, + l_bluefs_read_count, + l_bluefs_read_bytes, + l_bluefs_read_prefetch_count, + l_bluefs_read_prefetch_bytes, + l_bluefs_read_zeros_candidate, + l_bluefs_read_zeros_errors, + + l_bluefs_last, +}; + +class BlueFSVolumeSelector { +public: + typedef std::vector<std::pair<std::string, uint64_t>> paths; + + virtual ~BlueFSVolumeSelector() { + } + virtual void* get_hint_for_log() const = 0; + virtual void* get_hint_by_dir(std::string_view dirname) const = 0; + + virtual void add_usage(void* file_hint, const bluefs_fnode_t& fnode) = 0; + virtual void sub_usage(void* file_hint, const bluefs_fnode_t& fnode) = 0; + virtual void add_usage(void* file_hint, uint64_t fsize) = 0; + virtual void sub_usage(void* file_hint, uint64_t fsize) = 0; + virtual uint8_t select_prefer_bdev(void* hint) = 0; + virtual void get_paths(const std::string& base, paths& res) const = 0; + virtual void dump(std::ostream& sout) = 0; +}; + +struct bluefs_shared_alloc_context_t { + bool need_init = false; + Allocator* a = nullptr; + + std::atomic<uint64_t> bluefs_used = 0; + + void set(Allocator* _a) { + a = _a; + need_init = true; + bluefs_used = 0; + } + void reset() { + a = nullptr; + } +}; + +class BlueFS { +public: + CephContext* cct; + static constexpr unsigned MAX_BDEV = 5; + static constexpr unsigned BDEV_WAL = 0; + static constexpr unsigned BDEV_DB = 1; + static constexpr unsigned BDEV_SLOW = 2; + static constexpr unsigned BDEV_NEWWAL = 3; + static constexpr unsigned BDEV_NEWDB = 4; + + enum { + WRITER_UNKNOWN, + WRITER_WAL, + WRITER_SST, + }; + + struct File : public RefCountedObject { + MEMPOOL_CLASS_HELPERS(); + + bluefs_fnode_t fnode; + int refs; + uint64_t dirty_seq; + bool locked; + bool deleted; + bool is_dirty; + boost::intrusive::list_member_hook<> dirty_item; + + std::atomic_int num_readers, num_writers; + std::atomic_int num_reading; + + void* vselector_hint = nullptr; + + private: + FRIEND_MAKE_REF(File); + File() + : + refs(0), + dirty_seq(0), + locked(false), + deleted(false), + is_dirty(false), + num_readers(0), + num_writers(0), + num_reading(0), + vselector_hint(nullptr) + {} + ~File() override { + ceph_assert(num_readers.load() == 0); + ceph_assert(num_writers.load() == 0); + ceph_assert(num_reading.load() == 0); + ceph_assert(!locked); + } + }; + using FileRef = ceph::ref_t<File>; + + typedef boost::intrusive::list< + File, + boost::intrusive::member_hook< + File, + boost::intrusive::list_member_hook<>, + &File::dirty_item> > dirty_file_list_t; + + struct Dir : public RefCountedObject { + MEMPOOL_CLASS_HELPERS(); + + mempool::bluefs::map<std::string, FileRef, std::less<>> file_map; + + private: + FRIEND_MAKE_REF(Dir); + Dir() = default; + }; + using DirRef = ceph::ref_t<Dir>; + + struct FileWriter { + MEMPOOL_CLASS_HELPERS(); + + FileRef file; + uint64_t pos = 0; ///< start offset for buffer + private: + ceph::buffer::list buffer; ///< new data to write (at end of file) + ceph::buffer::list tail_block; ///< existing partial block at end of file, if any + public: + unsigned get_buffer_length() const { + return buffer.length(); + } + ceph::bufferlist flush_buffer( + CephContext* cct, + const bool partial, + const unsigned length, + const bluefs_super_t& super); + ceph::buffer::list::page_aligned_appender buffer_appender; //< for const char* only + public: + int writer_type = 0; ///< WRITER_* + int write_hint = WRITE_LIFE_NOT_SET; + + ceph::mutex lock = ceph::make_mutex("BlueFS::FileWriter::lock"); + std::array<IOContext*,MAX_BDEV> iocv; ///< for each bdev + std::array<bool, MAX_BDEV> dirty_devs; + + FileWriter(FileRef f) + : file(std::move(f)), + buffer_appender(buffer.get_page_aligned_appender( + g_conf()->bluefs_alloc_size / CEPH_PAGE_SIZE)) { + ++file->num_writers; + iocv.fill(nullptr); + dirty_devs.fill(false); + if (file->fnode.ino == 1) { + write_hint = WRITE_LIFE_MEDIUM; + } + } + // NOTE: caller must call BlueFS::close_writer() + ~FileWriter() { + --file->num_writers; + } + + // note: BlueRocksEnv uses this append exclusively, so it's safe + // to use buffer_appender exclusively here (e.g., it's notion of + // offset will remain accurate). + void append(const char *buf, size_t len) { + uint64_t l0 = get_buffer_length(); + ceph_assert(l0 + len <= std::numeric_limits<unsigned>::max()); + buffer_appender.append(buf, len); + } + + // note: used internally only, for ino 1 or 0. + void append(ceph::buffer::list& bl) { + uint64_t l0 = get_buffer_length(); + ceph_assert(l0 + bl.length() <= std::numeric_limits<unsigned>::max()); + buffer.claim_append(bl); + } + + void append_zero(size_t len) { + uint64_t l0 = get_buffer_length(); + ceph_assert(l0 + len <= std::numeric_limits<unsigned>::max()); + buffer_appender.append_zero(len); + } + + uint64_t get_effective_write_pos() { + return pos + buffer.length(); + } + }; + + struct FileReaderBuffer { + MEMPOOL_CLASS_HELPERS(); + + uint64_t bl_off = 0; ///< prefetch buffer logical offset + ceph::buffer::list bl; ///< prefetch buffer + uint64_t pos = 0; ///< current logical offset + uint64_t max_prefetch; ///< max allowed prefetch + + explicit FileReaderBuffer(uint64_t mpf) + : max_prefetch(mpf) {} + + uint64_t get_buf_end() const { + return bl_off + bl.length(); + } + uint64_t get_buf_remaining(uint64_t p) const { + if (p >= bl_off && p < bl_off + bl.length()) + return bl_off + bl.length() - p; + return 0; + } + + void skip(size_t n) { + pos += n; + } + + // For the sake of simplicity, we invalidate completed rather than + // for the provided extent + void invalidate_cache(uint64_t offset, uint64_t length) { + if (offset >= bl_off && offset < get_buf_end()) { + bl.clear(); + bl_off = 0; + } + } + }; + + struct FileReader { + MEMPOOL_CLASS_HELPERS(); + + FileRef file; + FileReaderBuffer buf; + bool random; + bool ignore_eof; ///< used when reading our log file + + ceph::shared_mutex lock { + ceph::make_shared_mutex(std::string(), false, false, false) + }; + + + FileReader(FileRef f, uint64_t mpf, bool rand, bool ie) + : file(f), + buf(mpf), + random(rand), + ignore_eof(ie) { + ++file->num_readers; + } + ~FileReader() { + --file->num_readers; + } + }; + + struct FileLock { + MEMPOOL_CLASS_HELPERS(); + + FileRef file; + explicit FileLock(FileRef f) : file(std::move(f)) {} + }; + +private: + ceph::mutex lock = ceph::make_mutex("BlueFS::lock"); + + PerfCounters *logger = nullptr; + + uint64_t max_bytes[MAX_BDEV] = {0}; + uint64_t max_bytes_pcounters[MAX_BDEV] = { + l_bluefs_max_bytes_wal, + l_bluefs_max_bytes_db, + l_bluefs_max_bytes_slow, + }; + + // cache + mempool::bluefs::map<std::string, DirRef, std::less<>> dir_map; ///< dirname -> Dir + mempool::bluefs::unordered_map<uint64_t, FileRef> file_map; ///< ino -> File + + // map of dirty files, files of same dirty_seq are grouped into list. + std::map<uint64_t, dirty_file_list_t> dirty_files; + + bluefs_super_t super; ///< latest superblock (as last written) + uint64_t ino_last = 0; ///< last assigned ino (this one is in use) + uint64_t log_seq = 0; ///< last used log seq (by current pending log_t) + uint64_t log_seq_stable = 0; ///< last stable/synced log seq + FileWriter *log_writer = 0; ///< writer for the log + bluefs_transaction_t log_t; ///< pending, unwritten log transaction + bool log_flushing = false; ///< true while flushing the log + ceph::condition_variable log_cond; + + uint64_t new_log_jump_to = 0; + uint64_t old_log_jump_to = 0; + FileRef new_log = nullptr; + FileWriter *new_log_writer = nullptr; + + /* + * There are up to 3 block devices: + * + * BDEV_DB db/ - the primary db device + * BDEV_WAL db.wal/ - a small, fast device, specifically for the WAL + * BDEV_SLOW db.slow/ - a big, slow device, to spill over to as BDEV_DB fills + */ + std::vector<BlockDevice*> bdev; ///< block devices we can use + std::vector<IOContext*> ioc; ///< IOContexts for bdevs + std::vector<uint64_t> block_reserved; ///< starting reserve extent per device + std::vector<Allocator*> alloc; ///< allocators for bdevs + std::vector<uint64_t> alloc_size; ///< alloc size for each device + std::vector<interval_set<uint64_t>> pending_release; ///< extents to release + //std::vector<interval_set<uint64_t>> block_unused_too_granular; + + BlockDevice::aio_callback_t discard_cb[3]; //discard callbacks for each dev + + std::unique_ptr<BlueFSVolumeSelector> vselector; + + bluefs_shared_alloc_context_t* shared_alloc = nullptr; + unsigned shared_alloc_id = unsigned(-1); + inline bool is_shared_alloc(unsigned id) const { + return id == shared_alloc_id; + } + + class SocketHook; + SocketHook* asok_hook = nullptr; + // used to trigger zeros into read (debug / verify) + std::atomic<uint64_t> inject_read_zeros{0}; + + void _init_logger(); + void _shutdown_logger(); + void _update_logger_stats(); + + void _init_alloc(); + void _stop_alloc(); + + void _pad_bl(ceph::buffer::list& bl); ///< pad ceph::buffer::list to block size w/ zeros + + uint64_t _get_used(unsigned id) const; + uint64_t _get_total(unsigned id) const; + + + FileRef _get_file(uint64_t ino); + void _drop_link(FileRef f); + + unsigned _get_slow_device_id() { + return bdev[BDEV_SLOW] ? BDEV_SLOW : BDEV_DB; + } + const char* get_device_name(unsigned id); + int _allocate(uint8_t bdev, uint64_t len, + bluefs_fnode_t* node); + int _allocate_without_fallback(uint8_t id, uint64_t len, + PExtentVector* extents); + + /* signal replay log to include h->file in nearest log flush */ + int _signal_dirty_to_log(FileWriter *h); + int _flush_range(FileWriter *h, uint64_t offset, uint64_t length); + int _flush(FileWriter *h, bool force, std::unique_lock<ceph::mutex>& l); + int _flush(FileWriter *h, bool force, bool *flushed = nullptr); + int _fsync(FileWriter *h, std::unique_lock<ceph::mutex>& l); + +#ifdef HAVE_LIBAIO + void _claim_completed_aios(FileWriter *h, std::list<aio_t> *ls); + void wait_for_aio(FileWriter *h); // safe to call without a lock +#endif + + int _flush_and_sync_log(std::unique_lock<ceph::mutex>& l, + uint64_t want_seq = 0, + uint64_t jump_to = 0); + uint64_t _estimate_log_size(); + bool _should_compact_log(); + + enum { + REMOVE_DB = 1, + REMOVE_WAL = 2, + RENAME_SLOW2DB = 4, + RENAME_DB2SLOW = 8, + }; + void _compact_log_dump_metadata(bluefs_transaction_t *t, + int flags); + void _compact_log_sync(); + void _compact_log_async(std::unique_lock<ceph::mutex>& l); + + void _rewrite_log_and_layout_sync(bool allocate_with_fallback, + int super_dev, + int log_dev, + int new_log_dev, + int flags, + std::optional<bluefs_layout_t> layout); + + //void _aio_finish(void *priv); + + void _flush_bdev_safely(FileWriter *h); + void flush_bdev(); // this is safe to call without a lock + void flush_bdev(std::array<bool, MAX_BDEV>& dirty_bdevs); // this is safe to call without a lock + + int _preallocate(FileRef f, uint64_t off, uint64_t len); + int _truncate(FileWriter *h, uint64_t off); + + int64_t _read( + FileReader *h, ///< [in] read from here + uint64_t offset, ///< [in] offset + size_t len, ///< [in] this many bytes + ceph::buffer::list *outbl, ///< [out] optional: reference the result here + char *out); ///< [out] optional: or copy it here + int64_t _read_random( + FileReader *h, ///< [in] read from here + uint64_t offset, ///< [in] offset + uint64_t len, ///< [in] this many bytes + char *out); ///< [out] optional: or copy it here + + void _invalidate_cache(FileRef f, uint64_t offset, uint64_t length); + + int _open_super(); + int _write_super(int dev); + int _check_allocations(const bluefs_fnode_t& fnode, + boost::dynamic_bitset<uint64_t>* used_blocks, + bool is_alloc, //true when allocating, false when deallocating + const char* op_name); + int _verify_alloc_granularity( + __u8 id, uint64_t offset, uint64_t length, + const char *op); + int _replay(bool noop, bool to_stdout = false); ///< replay journal + + FileWriter *_create_writer(FileRef f); + void _close_writer(FileWriter *h); + + // always put the super in the second 4k block. FIXME should this be + // block size independent? + unsigned get_super_offset() { + return 4096; + } + unsigned get_super_length() { + return 4096; + } + +public: + BlueFS(CephContext* cct); + ~BlueFS(); + + // the super is always stored on bdev 0 + int mkfs(uuid_d osd_uuid, const bluefs_layout_t& layout); + int mount(); + int maybe_verify_layout(const bluefs_layout_t& layout) const; + void umount(bool avoid_compact = false); + int prepare_new_device(int id, const bluefs_layout_t& layout); + + int log_dump(); + + void collect_metadata(std::map<std::string,std::string> *pm, unsigned skip_bdev_id); + void get_devices(std::set<std::string> *ls); + uint64_t get_alloc_size(int id) { + return alloc_size[id]; + } + int fsck(); + + int device_migrate_to_new( + CephContext *cct, + const std::set<int>& devs_source, + int dev_target, + const bluefs_layout_t& layout); + int device_migrate_to_existing( + CephContext *cct, + const std::set<int>& devs_source, + int dev_target, + const bluefs_layout_t& layout); + + uint64_t get_used(); + uint64_t get_total(unsigned id); + uint64_t get_free(unsigned id); + uint64_t get_used(unsigned id); + void dump_perf_counters(ceph::Formatter *f); + + void dump_block_extents(std::ostream& out); + + /// get current extents that we own for given block device + int get_block_extents(unsigned id, interval_set<uint64_t> *extents); + + int open_for_write( + std::string_view dir, + std::string_view file, + FileWriter **h, + bool overwrite); + + int open_for_read( + std::string_view dir, + std::string_view file, + FileReader **h, + bool random = false); + + void close_writer(FileWriter *h) { + std::lock_guard l(lock); + _close_writer(h); + } + + int rename(std::string_view old_dir, std::string_view old_file, + std::string_view new_dir, std::string_view new_file); + + int readdir(std::string_view dirname, std::vector<std::string> *ls); + + int unlink(std::string_view dirname, std::string_view filename); + int mkdir(std::string_view dirname); + int rmdir(std::string_view dirname); + bool wal_is_rotational(); + + bool dir_exists(std::string_view dirname); + int stat(std::string_view dirname, std::string_view filename, + uint64_t *size, utime_t *mtime); + + int lock_file(std::string_view dirname, std::string_view filename, FileLock **p); + int unlock_file(FileLock *l); + + void compact_log(); + + /// sync any uncommitted state to disk + void sync_metadata(bool avoid_compact); + /// test and compact log, if necessary + void _maybe_compact_log(std::unique_lock<ceph::mutex>& l); + + void set_volume_selector(BlueFSVolumeSelector* s) { + vselector.reset(s); + } + void dump_volume_selector(std::ostream& sout) { + vselector->dump(sout); + } + void get_vselector_paths(const std::string& base, + BlueFSVolumeSelector::paths& res) const { + return vselector->get_paths(base, res); + } + + int add_block_device(unsigned bdev, const std::string& path, bool trim, + uint64_t reserved, + bluefs_shared_alloc_context_t* _shared_alloc = nullptr); + bool bdev_support_label(unsigned id); + uint64_t get_block_device_size(unsigned bdev) const; + + // handler for discard event + void handle_discard(unsigned dev, interval_set<uint64_t>& to_release); + + void flush(FileWriter *h, bool force = false) { + std::unique_lock l(lock); + int r = _flush(h, force, l); + ceph_assert(r == 0); + } + + void append_try_flush(FileWriter *h, const char* buf, size_t len) { + size_t max_size = 1ull << 30; // cap to 1GB + while (len > 0) { + bool need_flush = true; + auto l0 = h->get_buffer_length(); + if (l0 < max_size) { + size_t l = std::min(len, max_size - l0); + h->append(buf, l); + buf += l; + len -= l; + need_flush = h->get_buffer_length() >= cct->_conf->bluefs_min_flush_size; + } + if (need_flush) { + flush(h, true); + // make sure we've made any progress with flush hence the + // loop doesn't iterate forever + ceph_assert(h->get_buffer_length() < max_size); + } + } + } + void flush_range(FileWriter *h, uint64_t offset, uint64_t length) { + std::lock_guard l(lock); + _flush_range(h, offset, length); + } + int fsync(FileWriter *h) { + std::unique_lock l(lock); + int r = _fsync(h, l); + _maybe_compact_log(l); + return r; + } + int64_t read(FileReader *h, uint64_t offset, size_t len, + ceph::buffer::list *outbl, char *out) { + // no need to hold the global lock here; we only touch h and + // h->file, and read vs write or delete is already protected (via + // atomics and asserts). + return _read(h, offset, len, outbl, out); + } + int64_t read_random(FileReader *h, uint64_t offset, size_t len, + char *out) { + // no need to hold the global lock here; we only touch h and + // h->file, and read vs write or delete is already protected (via + // atomics and asserts). + return _read_random(h, offset, len, out); + } + void invalidate_cache(FileRef f, uint64_t offset, uint64_t len) { + std::lock_guard l(lock); + _invalidate_cache(f, offset, len); + } + int preallocate(FileRef f, uint64_t offset, uint64_t len) { + std::lock_guard l(lock); + return _preallocate(f, offset, len); + } + int truncate(FileWriter *h, uint64_t offset) { + std::lock_guard l(lock); + return _truncate(h, offset); + } + int do_replay_recovery_read(FileReader *log, + size_t log_pos, + size_t read_offset, + size_t read_len, + bufferlist* bl); + + size_t probe_alloc_avail(int dev, uint64_t alloc_size); + + /// test purpose methods + const PerfCounters* get_perf_counters() const { + return logger; + } + uint64_t debug_get_dirty_seq(FileWriter *h); + bool debug_get_is_dev_dirty(FileWriter *h, uint8_t dev); + +private: + // Wrappers for BlockDevice::read(...) and BlockDevice::read_random(...) + // They are used for checking if read values are all 0, and reread if so. + int read(uint8_t ndev, uint64_t off, uint64_t len, + ceph::buffer::list *pbl, IOContext *ioc, bool buffered); + int read_random(uint8_t ndev, uint64_t off, uint64_t len, char *buf, bool buffered); +}; + +class OriginalVolumeSelector : public BlueFSVolumeSelector { + uint64_t wal_total; + uint64_t db_total; + uint64_t slow_total; + +public: + OriginalVolumeSelector( + uint64_t _wal_total, + uint64_t _db_total, + uint64_t _slow_total) + : wal_total(_wal_total), db_total(_db_total), slow_total(_slow_total) {} + + void* get_hint_for_log() const override; + void* get_hint_by_dir(std::string_view dirname) const override; + + void add_usage(void* hint, const bluefs_fnode_t& fnode) override { + // do nothing + return; + } + void sub_usage(void* hint, const bluefs_fnode_t& fnode) override { + // do nothing + return; + } + void add_usage(void* hint, uint64_t fsize) override { + // do nothing + return; + } + void sub_usage(void* hint, uint64_t fsize) override { + // do nothing + return; + } + + uint8_t select_prefer_bdev(void* hint) override; + void get_paths(const std::string& base, paths& res) const override; + void dump(std::ostream& sout) override; +}; + +class FitToFastVolumeSelector : public OriginalVolumeSelector { +public: + FitToFastVolumeSelector( + uint64_t _wal_total, + uint64_t _db_total, + uint64_t _slow_total) + : OriginalVolumeSelector(_wal_total, _db_total, _slow_total) {} + + void get_paths(const std::string& base, paths& res) const override; +}; + +#endif diff --git a/src/os/bluestore/BlueRocksEnv.cc b/src/os/bluestore/BlueRocksEnv.cc new file mode 100644 index 000000000..f8a2b7025 --- /dev/null +++ b/src/os/bluestore/BlueRocksEnv.cc @@ -0,0 +1,594 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#include "BlueRocksEnv.h" +#include "BlueFS.h" +#include "include/stringify.h" +#include "kv/RocksDBStore.h" +#include "string.h" + +namespace { + +rocksdb::Status err_to_status(int r) +{ + switch (r) { + case 0: + return rocksdb::Status::OK(); + case -ENOENT: + return rocksdb::Status::NotFound(rocksdb::Status::kNone); + case -EINVAL: + return rocksdb::Status::InvalidArgument(rocksdb::Status::kNone); + case -EIO: + case -EEXIST: + return rocksdb::Status::IOError(rocksdb::Status::kNone); + case -ENOLCK: + return rocksdb::Status::IOError(strerror(r)); + default: + // FIXME :( + ceph_abort_msg("unrecognized error code"); + return rocksdb::Status::NotSupported(rocksdb::Status::kNone); + } +} + +std::pair<std::string_view, std::string_view> +split(const std::string &fn) +{ + size_t slash = fn.rfind('/'); + assert(slash != fn.npos); + size_t file_begin = slash + 1; + while (slash && fn[slash - 1] == '/') + --slash; + return {string_view(fn.data(), slash), + string_view(fn.data() + file_begin, + fn.size() - file_begin)}; +} + +} + +// A file abstraction for reading sequentially through a file +class BlueRocksSequentialFile : public rocksdb::SequentialFile { + BlueFS *fs; + BlueFS::FileReader *h; + public: + BlueRocksSequentialFile(BlueFS *fs, BlueFS::FileReader *h) : fs(fs), h(h) {} + ~BlueRocksSequentialFile() override { + delete h; + } + + // Read up to "n" bytes from the file. "scratch[0..n-1]" may be + // written by this routine. Sets "*result" to the data that was + // read (including if fewer than "n" bytes were successfully read). + // May set "*result" to point at data in "scratch[0..n-1]", so + // "scratch[0..n-1]" must be live when "*result" is used. + // If an error was encountered, returns a non-OK status. + // + // REQUIRES: External synchronization + rocksdb::Status Read(size_t n, rocksdb::Slice* result, char* scratch) override { + int64_t r = fs->read(h, h->buf.pos, n, NULL, scratch); + ceph_assert(r >= 0); + *result = rocksdb::Slice(scratch, r); + return rocksdb::Status::OK(); + } + + // Skip "n" bytes from the file. This is guaranteed to be no + // slower that reading the same data, but may be faster. + // + // If end of file is reached, skipping will stop at the end of the + // file, and Skip will return OK. + // + // REQUIRES: External synchronization + rocksdb::Status Skip(uint64_t n) override { + h->buf.skip(n); + return rocksdb::Status::OK(); + } + + // Remove any kind of caching of data from the offset to offset+length + // of this file. If the length is 0, then it refers to the end of file. + // If the system is not caching the file contents, then this is a noop. + rocksdb::Status InvalidateCache(size_t offset, size_t length) override { + h->buf.invalidate_cache(offset, length); + fs->invalidate_cache(h->file, offset, length); + return rocksdb::Status::OK(); + } +}; + +// A file abstraction for randomly reading the contents of a file. +class BlueRocksRandomAccessFile : public rocksdb::RandomAccessFile { + BlueFS *fs; + BlueFS::FileReader *h; + public: + BlueRocksRandomAccessFile(BlueFS *fs, BlueFS::FileReader *h) : fs(fs), h(h) {} + ~BlueRocksRandomAccessFile() override { + delete h; + } + + // Read up to "n" bytes from the file starting at "offset". + // "scratch[0..n-1]" may be written by this routine. Sets "*result" + // to the data that was read (including if fewer than "n" bytes were + // successfully read). May set "*result" to point at data in + // "scratch[0..n-1]", so "scratch[0..n-1]" must be live when + // "*result" is used. If an error was encountered, returns a non-OK + // status. + // + // Safe for concurrent use by multiple threads. + rocksdb::Status Read(uint64_t offset, size_t n, rocksdb::Slice* result, + char* scratch) const override { + int64_t r = fs->read_random(h, offset, n, scratch); + ceph_assert(r >= 0); + *result = rocksdb::Slice(scratch, r); + return rocksdb::Status::OK(); + } + + // Tries to get an unique ID for this file that will be the same each time + // the file is opened (and will stay the same while the file is open). + // Furthermore, it tries to make this ID at most "max_size" bytes. If such an + // ID can be created this function returns the length of the ID and places it + // in "id"; otherwise, this function returns 0, in which case "id" + // may not have been modified. + // + // This function guarantees, for IDs from a given environment, two unique ids + // cannot be made equal to eachother by adding arbitrary bytes to one of + // them. That is, no unique ID is the prefix of another. + // + // This function guarantees that the returned ID will not be interpretable as + // a single varint. + // + // Note: these IDs are only valid for the duration of the process. + size_t GetUniqueId(char* id, size_t max_size) const override { + return snprintf(id, max_size, "%016llx", + (unsigned long long)h->file->fnode.ino); + }; + + // Readahead the file starting from offset by n bytes for caching. + rocksdb::Status Prefetch(uint64_t offset, size_t n) override { + fs->read(h, offset, n, nullptr, nullptr); + return rocksdb::Status::OK(); + } + + //enum AccessPattern { NORMAL, RANDOM, SEQUENTIAL, WILLNEED, DONTNEED }; + + void Hint(AccessPattern pattern) override { + if (pattern == RANDOM) + h->buf.max_prefetch = 4096; + else if (pattern == SEQUENTIAL) + h->buf.max_prefetch = fs->cct->_conf->bluefs_max_prefetch; + } + + bool use_direct_io() const override { + return !fs->cct->_conf->bluefs_buffered_io; + } + + // Remove any kind of caching of data from the offset to offset+length + // of this file. If the length is 0, then it refers to the end of file. + // If the system is not caching the file contents, then this is a noop. + rocksdb::Status InvalidateCache(size_t offset, size_t length) override { + h->buf.invalidate_cache(offset, length); + fs->invalidate_cache(h->file, offset, length); + return rocksdb::Status::OK(); + } +}; + + +// A file abstraction for sequential writing. The implementation +// must provide buffering since callers may append small fragments +// at a time to the file. +class BlueRocksWritableFile : public rocksdb::WritableFile { + BlueFS *fs; + BlueFS::FileWriter *h; + public: + BlueRocksWritableFile(BlueFS *fs, BlueFS::FileWriter *h) : fs(fs), h(h) {} + ~BlueRocksWritableFile() override { + fs->close_writer(h); + } + + // Indicates if the class makes use of unbuffered I/O + /*bool UseOSBuffer() const { + return true; + }*/ + + // This is needed when you want to allocate + // AlignedBuffer for use with file I/O classes + // Used for unbuffered file I/O when UseOSBuffer() returns false + /*size_t GetRequiredBufferAlignment() const { + return c_DefaultPageSize; + }*/ + + rocksdb::Status Append(const rocksdb::Slice& data) override { + fs->append_try_flush(h, data.data(), data.size()); + return rocksdb::Status::OK(); + } + + // Positioned write for unbuffered access default forward + // to simple append as most of the tests are buffered by default + rocksdb::Status PositionedAppend( + const rocksdb::Slice& /* data */, + uint64_t /* offset */) override { + return rocksdb::Status::NotSupported(); + } + + // Truncate is necessary to trim the file to the correct size + // before closing. It is not always possible to keep track of the file + // size due to whole pages writes. The behavior is undefined if called + // with other writes to follow. + rocksdb::Status Truncate(uint64_t size) override { + // we mirror the posix env, which does nothing here; instead, it + // truncates to the final size on close. whatever! + return rocksdb::Status::OK(); + //int r = fs->truncate(h, size); + // return err_to_status(r); + } + + rocksdb::Status Close() override { + fs->fsync(h); + + // mimic posix env, here. shrug. + size_t block_size; + size_t last_allocated_block; + GetPreallocationStatus(&block_size, &last_allocated_block); + if (last_allocated_block > 0) { + int r = fs->truncate(h, h->pos); + if (r < 0) + return err_to_status(r); + } + + return rocksdb::Status::OK(); + } + + rocksdb::Status Flush() override { + fs->flush(h); + return rocksdb::Status::OK(); + } + + rocksdb::Status Sync() override { // sync data + fs->fsync(h); + return rocksdb::Status::OK(); + } + + // true if Sync() and Fsync() are safe to call concurrently with Append() + // and Flush(). + bool IsSyncThreadSafe() const override { + return true; + } + + // Indicates the upper layers if the current WritableFile implementation + // uses direct IO. + bool UseDirectIO() const { + return false; + } + + void SetWriteLifeTimeHint(rocksdb::Env::WriteLifeTimeHint hint) override { + h->write_hint = (const int)hint; + } + + /* + * Get the size of valid data in the file. + */ + uint64_t GetFileSize() override { + return h->file->fnode.size + h->get_buffer_length();; + } + + // For documentation, refer to RandomAccessFile::GetUniqueId() + size_t GetUniqueId(char* id, size_t max_size) const override { + return snprintf(id, max_size, "%016llx", + (unsigned long long)h->file->fnode.ino); + } + + // Remove any kind of caching of data from the offset to offset+length + // of this file. If the length is 0, then it refers to the end of file. + // If the system is not caching the file contents, then this is a noop. + // This call has no effect on dirty pages in the cache. + rocksdb::Status InvalidateCache(size_t offset, size_t length) override { + fs->fsync(h); + fs->invalidate_cache(h->file, offset, length); + return rocksdb::Status::OK(); + } + + using rocksdb::WritableFile::RangeSync; + // Sync a file range with disk. + // offset is the starting byte of the file range to be synchronized. + // nbytes specifies the length of the range to be synchronized. + // This asks the OS to initiate flushing the cached data to disk, + // without waiting for completion. + // Default implementation does nothing. + rocksdb::Status RangeSync(off_t offset, off_t nbytes) { + // round down to page boundaries + int partial = offset & 4095; + offset -= partial; + nbytes += partial; + nbytes &= ~4095; + if (nbytes) + fs->flush_range(h, offset, nbytes); + return rocksdb::Status::OK(); + } + + protected: + using rocksdb::WritableFile::Allocate; + /* + * Pre-allocate space for a file. + */ + rocksdb::Status Allocate(off_t offset, off_t len) { + int r = fs->preallocate(h->file, offset, len); + return err_to_status(r); + } +}; + + +// Directory object represents collection of files and implements +// filesystem operations that can be executed on directories. +class BlueRocksDirectory : public rocksdb::Directory { + BlueFS *fs; + public: + explicit BlueRocksDirectory(BlueFS *f) : fs(f) {} + + // Fsync directory. Can be called concurrently from multiple threads. + rocksdb::Status Fsync() override { + // it is sufficient to flush the log. + fs->sync_metadata(false); + return rocksdb::Status::OK(); + } +}; + +// Identifies a locked file. +class BlueRocksFileLock : public rocksdb::FileLock { + public: + BlueFS *fs; + BlueFS::FileLock *lock; + BlueRocksFileLock(BlueFS *fs, BlueFS::FileLock *l) : fs(fs), lock(l) { } + ~BlueRocksFileLock() override { + } +}; + + +// -------------------- +// --- BlueRocksEnv --- +// -------------------- + +BlueRocksEnv::BlueRocksEnv(BlueFS *f) + : EnvWrapper(Env::Default()), // forward most of it to POSIX + fs(f) +{ + +} + +rocksdb::Status BlueRocksEnv::NewSequentialFile( + const std::string& fname, + std::unique_ptr<rocksdb::SequentialFile>* result, + const rocksdb::EnvOptions& options) +{ + if (fname[0] == '/') + return target()->NewSequentialFile(fname, result, options); + auto [dir, file] = split(fname); + BlueFS::FileReader *h; + int r = fs->open_for_read(dir, file, &h, false); + if (r < 0) + return err_to_status(r); + result->reset(new BlueRocksSequentialFile(fs, h)); + return rocksdb::Status::OK(); +} + +rocksdb::Status BlueRocksEnv::NewRandomAccessFile( + const std::string& fname, + std::unique_ptr<rocksdb::RandomAccessFile>* result, + const rocksdb::EnvOptions& options) +{ + auto [dir, file] = split(fname); + BlueFS::FileReader *h; + int r = fs->open_for_read(dir, file, &h, true); + if (r < 0) + return err_to_status(r); + result->reset(new BlueRocksRandomAccessFile(fs, h)); + return rocksdb::Status::OK(); +} + +rocksdb::Status BlueRocksEnv::NewWritableFile( + const std::string& fname, + std::unique_ptr<rocksdb::WritableFile>* result, + const rocksdb::EnvOptions& options) +{ + auto [dir, file] = split(fname); + BlueFS::FileWriter *h; + int r = fs->open_for_write(dir, file, &h, false); + if (r < 0) + return err_to_status(r); + result->reset(new BlueRocksWritableFile(fs, h)); + return rocksdb::Status::OK(); +} + +rocksdb::Status BlueRocksEnv::ReuseWritableFile( + const std::string& new_fname, + const std::string& old_fname, + std::unique_ptr<rocksdb::WritableFile>* result, + const rocksdb::EnvOptions& options) +{ + auto [old_dir, old_file] = split(old_fname); + auto [new_dir, new_file] = split(new_fname); + + int r = fs->rename(old_dir, old_file, new_dir, new_file); + if (r < 0) + return err_to_status(r); + + BlueFS::FileWriter *h; + r = fs->open_for_write(new_dir, new_file, &h, true); + if (r < 0) + return err_to_status(r); + result->reset(new BlueRocksWritableFile(fs, h)); + return rocksdb::Status::OK(); +} + +rocksdb::Status BlueRocksEnv::NewDirectory( + const std::string& name, + std::unique_ptr<rocksdb::Directory>* result) +{ + if (!fs->dir_exists(name)) + return rocksdb::Status::NotFound(name, strerror(ENOENT)); + result->reset(new BlueRocksDirectory(fs)); + return rocksdb::Status::OK(); +} + +rocksdb::Status BlueRocksEnv::FileExists(const std::string& fname) +{ + if (fname[0] == '/') + return target()->FileExists(fname); + auto [dir, file] = split(fname); + if (fs->stat(dir, file, NULL, NULL) == 0) + return rocksdb::Status::OK(); + return err_to_status(-ENOENT); +} + +rocksdb::Status BlueRocksEnv::GetChildren( + const std::string& dir, + std::vector<std::string>* result) +{ + result->clear(); + int r = fs->readdir(dir, result); + if (r < 0) + return rocksdb::Status::NotFound(dir, strerror(ENOENT));// return err_to_status(r); + return rocksdb::Status::OK(); +} + +rocksdb::Status BlueRocksEnv::DeleteFile(const std::string& fname) +{ + auto [dir, file] = split(fname); + int r = fs->unlink(dir, file); + if (r < 0) + return err_to_status(r); + return rocksdb::Status::OK(); +} + +rocksdb::Status BlueRocksEnv::CreateDir(const std::string& dirname) +{ + int r = fs->mkdir(dirname); + if (r < 0) + return err_to_status(r); + return rocksdb::Status::OK(); +} + +rocksdb::Status BlueRocksEnv::CreateDirIfMissing(const std::string& dirname) +{ + int r = fs->mkdir(dirname); + if (r < 0 && r != -EEXIST) + return err_to_status(r); + return rocksdb::Status::OK(); +} + +rocksdb::Status BlueRocksEnv::DeleteDir(const std::string& dirname) +{ + int r = fs->rmdir(dirname); + if (r < 0) + return err_to_status(r); + return rocksdb::Status::OK(); +} + +rocksdb::Status BlueRocksEnv::GetFileSize( + const std::string& fname, + uint64_t* file_size) +{ + auto [dir, file] = split(fname); + int r = fs->stat(dir, file, file_size, NULL); + if (r < 0) + return err_to_status(r); + return rocksdb::Status::OK(); +} + +rocksdb::Status BlueRocksEnv::GetFileModificationTime(const std::string& fname, + uint64_t* file_mtime) +{ + auto [dir, file] = split(fname); + utime_t mtime; + int r = fs->stat(dir, file, NULL, &mtime); + if (r < 0) + return err_to_status(r); + *file_mtime = mtime.sec(); + return rocksdb::Status::OK(); +} + +rocksdb::Status BlueRocksEnv::RenameFile( + const std::string& src, + const std::string& target) +{ + auto [old_dir, old_file] = split(src); + auto [new_dir, new_file] = split(target); + + int r = fs->rename(old_dir, old_file, new_dir, new_file); + if (r < 0) + return err_to_status(r); + return rocksdb::Status::OK(); +} + +rocksdb::Status BlueRocksEnv::LinkFile( + const std::string& src, + const std::string& target) +{ + ceph_abort(); +} + +rocksdb::Status BlueRocksEnv::AreFilesSame( + const std::string& first, + const std::string& second, bool* res) +{ + for (auto& path : {first, second}) { + if (fs->dir_exists(path)) { + continue; + } + auto [dir, file] = split(path); + int r = fs->stat(dir, file, nullptr, nullptr); + if (!r) { + continue; + } else if (r == -ENOENT) { + return rocksdb::Status::NotFound("AreFilesSame", path); + } else { + return err_to_status(r); + } + } + *res = (first == second); + return rocksdb::Status::OK(); +} + +rocksdb::Status BlueRocksEnv::LockFile( + const std::string& fname, + rocksdb::FileLock** lock) +{ + auto [dir, file] = split(fname); + BlueFS::FileLock *l = NULL; + int r = fs->lock_file(dir, file, &l); + if (r < 0) + return err_to_status(r); + *lock = new BlueRocksFileLock(fs, l); + return rocksdb::Status::OK(); +} + +rocksdb::Status BlueRocksEnv::UnlockFile(rocksdb::FileLock* lock) +{ + BlueRocksFileLock *l = static_cast<BlueRocksFileLock*>(lock); + int r = fs->unlock_file(l->lock); + if (r < 0) + return err_to_status(r); + delete lock; + lock = nullptr; + return rocksdb::Status::OK(); +} + +rocksdb::Status BlueRocksEnv::GetAbsolutePath( + const std::string& db_path, + std::string* output_path) +{ + // this is a lie... + *output_path = "/" + db_path; + return rocksdb::Status::OK(); +} + +rocksdb::Status BlueRocksEnv::NewLogger( + const std::string& fname, + std::shared_ptr<rocksdb::Logger>* result) +{ + // ignore the filename :) + result->reset(create_rocksdb_ceph_logger()); + return rocksdb::Status::OK(); +} + +rocksdb::Status BlueRocksEnv::GetTestDirectory(std::string* path) +{ + static int foo = 0; + *path = "temp_" + stringify(++foo); + return rocksdb::Status::OK(); +} diff --git a/src/os/bluestore/BlueRocksEnv.h b/src/os/bluestore/BlueRocksEnv.h new file mode 100644 index 000000000..62bcddcf6 --- /dev/null +++ b/src/os/bluestore/BlueRocksEnv.h @@ -0,0 +1,156 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab +#ifndef CEPH_OS_BLUESTORE_BLUEROCKSENV_H +#define CEPH_OS_BLUESTORE_BLUEROCKSENV_H + +#include <memory> +#include <string> + +#include "rocksdb/options.h" +#include "rocksdb/status.h" +#include "rocksdb/utilities/env_mirror.h" + +#include "include/ceph_assert.h" +#include "kv/RocksDBStore.h" + +class BlueFS; + +class BlueRocksEnv : public rocksdb::EnvWrapper { +public: + // Create a brand new sequentially-readable file with the specified name. + // On success, stores a pointer to the new file in *result and returns OK. + // On failure, stores nullptr in *result and returns non-OK. If the file does + // not exist, returns a non-OK status. + // + // The returned file will only be accessed by one thread at a time. + rocksdb::Status NewSequentialFile( + const std::string& fname, + std::unique_ptr<rocksdb::SequentialFile>* result, + const rocksdb::EnvOptions& options) override; + + // Create a brand new random access read-only file with the + // specified name. On success, stores a pointer to the new file in + // *result and returns OK. On failure, stores nullptr in *result and + // returns non-OK. If the file does not exist, returns a non-OK + // status. + // + // The returned file may be concurrently accessed by multiple threads. + rocksdb::Status NewRandomAccessFile( + const std::string& fname, + std::unique_ptr<rocksdb::RandomAccessFile>* result, + const rocksdb::EnvOptions& options) override; + + // Create an object that writes to a new file with the specified + // name. Deletes any existing file with the same name and creates a + // new file. On success, stores a pointer to the new file in + // *result and returns OK. On failure, stores nullptr in *result and + // returns non-OK. + // + // The returned file will only be accessed by one thread at a time. + rocksdb::Status NewWritableFile( + const std::string& fname, + std::unique_ptr<rocksdb::WritableFile>* result, + const rocksdb::EnvOptions& options) override; + + // Reuse an existing file by renaming it and opening it as writable. + rocksdb::Status ReuseWritableFile( + const std::string& fname, + const std::string& old_fname, + std::unique_ptr<rocksdb::WritableFile>* result, + const rocksdb::EnvOptions& options) override; + + // Create an object that represents a directory. Will fail if directory + // doesn't exist. If the directory exists, it will open the directory + // and create a new Directory object. + // + // On success, stores a pointer to the new Directory in + // *result and returns OK. On failure stores nullptr in *result and + // returns non-OK. + rocksdb::Status NewDirectory( + const std::string& name, + std::unique_ptr<rocksdb::Directory>* result) override; + + // Returns OK if the named file exists. + // NotFound if the named file does not exist, + // the calling process does not have permission to determine + // whether this file exists, or if the path is invalid. + // IOError if an IO Error was encountered + rocksdb::Status FileExists(const std::string& fname) override; + + // Store in *result the names of the children of the specified directory. + // The names are relative to "dir". + // Original contents of *results are dropped. + rocksdb::Status GetChildren(const std::string& dir, + std::vector<std::string>* result) override; + + // Delete the named file. + rocksdb::Status DeleteFile(const std::string& fname) override; + + // Create the specified directory. Returns error if directory exists. + rocksdb::Status CreateDir(const std::string& dirname) override; + + // Create directory if missing. Return Ok if it exists, or successful in + // Creating. + rocksdb::Status CreateDirIfMissing(const std::string& dirname) override; + + // Delete the specified directory. + rocksdb::Status DeleteDir(const std::string& dirname) override; + + // Store the size of fname in *file_size. + rocksdb::Status GetFileSize(const std::string& fname, uint64_t* file_size) override; + + // Store the last modification time of fname in *file_mtime. + rocksdb::Status GetFileModificationTime(const std::string& fname, + uint64_t* file_mtime) override; + // Rename file src to target. + rocksdb::Status RenameFile(const std::string& src, + const std::string& target) override; + // Hard Link file src to target. + rocksdb::Status LinkFile(const std::string& src, const std::string& target) override; + + // Tell if two files are identical + rocksdb::Status AreFilesSame(const std::string& first, + const std::string& second, bool* res) override; + + // Lock the specified file. Used to prevent concurrent access to + // the same db by multiple processes. On failure, stores nullptr in + // *lock and returns non-OK. + // + // On success, stores a pointer to the object that represents the + // acquired lock in *lock and returns OK. The caller should call + // UnlockFile(*lock) to release the lock. If the process exits, + // the lock will be automatically released. + // + // If somebody else already holds the lock, finishes immediately + // with a failure. I.e., this call does not wait for existing locks + // to go away. + // + // May create the named file if it does not already exist. + rocksdb::Status LockFile(const std::string& fname, rocksdb::FileLock** lock) override; + + // Release the lock acquired by a previous successful call to LockFile. + // REQUIRES: lock was returned by a successful LockFile() call + // REQUIRES: lock has not already been unlocked. + rocksdb::Status UnlockFile(rocksdb::FileLock* lock) override; + + // *path is set to a temporary directory that can be used for testing. It may + // or may not have just been created. The directory may or may not differ + // between runs of the same process, but subsequent calls will return the + // same directory. + rocksdb::Status GetTestDirectory(std::string* path) override; + + // Create and return a log file for storing informational messages. + rocksdb::Status NewLogger( + const std::string& fname, + std::shared_ptr<rocksdb::Logger>* result) override; + + // Get full directory name for this db. + rocksdb::Status GetAbsolutePath(const std::string& db_path, + std::string* output_path) override; + + explicit BlueRocksEnv(BlueFS *f); +private: + BlueFS *fs; +}; + +#endif diff --git a/src/os/bluestore/BlueStore.cc b/src/os/bluestore/BlueStore.cc new file mode 100644 index 000000000..751d26e1e --- /dev/null +++ b/src/os/bluestore/BlueStore.cc @@ -0,0 +1,16955 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab +/* + * Ceph - scalable distributed file system + * + * Copyright (C) 2014 Red Hat + * + * This is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License version 2.1, as published by the Free Software + * Foundation. See file COPYING. + * + */ + +#include <unistd.h> +#include <stdlib.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <algorithm> + +#include <boost/container/flat_set.hpp> +#include <boost/algorithm/string.hpp> + +#include "include/cpp-btree/btree_set.h" + +#include "BlueStore.h" +#include "bluestore_common.h" +#include "os/kv.h" +#include "include/compat.h" +#include "include/intarith.h" +#include "include/stringify.h" +#include "include/str_map.h" +#include "include/util.h" +#include "common/errno.h" +#include "common/safe_io.h" +#include "common/PriorityCache.h" +#include "common/RWLock.h" +#include "Allocator.h" +#include "FreelistManager.h" +#include "BlueFS.h" +#include "BlueRocksEnv.h" +#include "auth/Crypto.h" +#include "common/EventTrace.h" +#include "perfglue/heap_profiler.h" +#include "common/blkdev.h" +#include "common/numa.h" +#include "common/pretty_binary.h" + +#if defined(WITH_LTTNG) +#define TRACEPOINT_DEFINE +#define TRACEPOINT_PROBE_DYNAMIC_LINKAGE +#include "tracing/bluestore.h" +#undef TRACEPOINT_PROBE_DYNAMIC_LINKAGE +#undef TRACEPOINT_DEFINE +#else +#define tracepoint(...) +#endif + +#define dout_context cct +#define dout_subsys ceph_subsys_bluestore + +using bid_t = decltype(BlueStore::Blob::id); + +// bluestore_cache_onode +MEMPOOL_DEFINE_OBJECT_FACTORY(BlueStore::Onode, bluestore_onode, + bluestore_cache_onode); + +// bluestore_cache_other +MEMPOOL_DEFINE_OBJECT_FACTORY(BlueStore::Buffer, bluestore_buffer, + bluestore_Buffer); +MEMPOOL_DEFINE_OBJECT_FACTORY(BlueStore::Extent, bluestore_extent, + bluestore_Extent); +MEMPOOL_DEFINE_OBJECT_FACTORY(BlueStore::Blob, bluestore_blob, + bluestore_Blob); +MEMPOOL_DEFINE_OBJECT_FACTORY(BlueStore::SharedBlob, bluestore_shared_blob, + bluestore_SharedBlob); + +// bluestore_txc +MEMPOOL_DEFINE_OBJECT_FACTORY(BlueStore::TransContext, bluestore_transcontext, + bluestore_txc); +using std::deque; +using std::min; +using std::make_pair; +using std::numeric_limits; +using std::pair; +using std::list; +using std::map; +using std::max; +using std::ostream; +using std::ostringstream; +using std::set; +using std::string; +using std::stringstream; +using std::vector; + +using ceph::bufferlist; +using ceph::bufferptr; +using ceph::coarse_mono_clock; +using ceph::decode; +using ceph::encode; +using ceph::Formatter; +using ceph::JSONFormatter; +using ceph::make_timespan; +using ceph::mono_clock; +using ceph::mono_time; +using ceph::timespan_str; + +// kv store prefixes +const string PREFIX_SUPER = "S"; // field -> value +const string PREFIX_STAT = "T"; // field -> value(int64 array) +const string PREFIX_COLL = "C"; // collection name -> cnode_t +const string PREFIX_OBJ = "O"; // object name -> onode_t +const string PREFIX_OMAP = "M"; // u64 + keyname -> value +const string PREFIX_PGMETA_OMAP = "P"; // u64 + keyname -> value(for meta coll) +const string PREFIX_PERPOOL_OMAP = "m"; // s64 + u64 + keyname -> value +const string PREFIX_PERPG_OMAP = "p"; // u64(pool) + u32(hash) + u64(id) + keyname -> value +const string PREFIX_DEFERRED = "L"; // id -> deferred_transaction_t +const string PREFIX_ALLOC = "B"; // u64 offset -> u64 length (freelist) +const string PREFIX_ALLOC_BITMAP = "b";// (see BitmapFreelistManager) +const string PREFIX_SHARED_BLOB = "X"; // u64 SB id -> shared_blob_t +const string PREFIX_ZONED_FM_META = "Z"; // (see ZonedFreelistManager) +const string PREFIX_ZONED_FM_INFO = "z"; // (see ZonedFreelistManager) +const string PREFIX_ZONED_CL_INFO = "G"; // (per-zone cleaner metadata) + +const string BLUESTORE_GLOBAL_STATFS_KEY = "bluestore_statfs"; + +// write a label in the first block. always use this size. note that +// bluefs makes a matching assumption about the location of its +// superblock (always the second block of the device). +#define BDEV_LABEL_BLOCK_SIZE 4096 + +// reserve: label (4k) + bluefs super (4k), which means we start at 8k. +#define SUPER_RESERVED 8192 + +#define OBJECT_MAX_SIZE 0xffffffff // 32 bits + + +/* + * extent map blob encoding + * + * we use the low bits of the blobid field to indicate some common scenarios + * and spanning vs local ids. See ExtentMap::{encode,decode}_some(). + */ +#define BLOBID_FLAG_CONTIGUOUS 0x1 // this extent starts at end of previous +#define BLOBID_FLAG_ZEROOFFSET 0x2 // blob_offset is 0 +#define BLOBID_FLAG_SAMELENGTH 0x4 // length matches previous extent +#define BLOBID_FLAG_SPANNING 0x8 // has spanning blob id +#define BLOBID_SHIFT_BITS 4 + +/* + * object name key structure + * + * encoded u8: shard + 2^7 (so that it sorts properly) + * encoded u64: poolid + 2^63 (so that it sorts properly) + * encoded u32: hash (bit reversed) + * + * escaped string: namespace + * + * escaped string: key or object name + * 1 char: '<', '=', or '>'. if =, then object key == object name, and + * we are done. otherwise, we are followed by the object name. + * escaped string: object name (unless '=' above) + * + * encoded u64: snap + * encoded u64: generation + * 'o' + */ +#define ONODE_KEY_SUFFIX 'o' + +/* + * extent shard key + * + * object prefix key + * u32 + * 'x' + */ +#define EXTENT_SHARD_KEY_SUFFIX 'x' + +/* + * string encoding in the key + * + * The key string needs to lexicographically sort the same way that + * ghobject_t does. We do this by escaping anything <= to '#' with # + * plus a 2 digit hex string, and anything >= '~' with ~ plus the two + * hex digits. + * + * We use ! as a terminator for strings; this works because it is < # + * and will get escaped if it is present in the string. + * + * NOTE: There is a bug in this implementation: due to implicit + * character type conversion in comparison it may produce unexpected + * ordering. Unfortunately fixing the bug would mean invalidating the + * keys in existing deployments. Instead we do additional sorting + * where it is needed. + */ +template<typename S> +static void append_escaped(const string &in, S *out) +{ + char hexbyte[in.length() * 3 + 1]; + char* ptr = &hexbyte[0]; + for (string::const_iterator i = in.begin(); i != in.end(); ++i) { + if (*i <= '#') { // bug: unexpected result for *i > 0x7f + *ptr++ = '#'; + *ptr++ = "0123456789abcdef"[(*i >> 4) & 0x0f]; + *ptr++ = "0123456789abcdef"[*i & 0x0f]; + } else if (*i >= '~') { // bug: unexpected result for *i > 0x7f + *ptr++ = '~'; + *ptr++ = "0123456789abcdef"[(*i >> 4) & 0x0f]; + *ptr++ = "0123456789abcdef"[*i & 0x0f]; + } else { + *ptr++ = *i; + } + } + *ptr++ = '!'; + out->append(hexbyte, ptr - &hexbyte[0]); +} + +inline unsigned h2i(char c) +{ + if ((c >= '0') && (c <= '9')) { + return c - 0x30; + } else if ((c >= 'a') && (c <= 'f')) { + return c - 'a' + 10; + } else if ((c >= 'A') && (c <= 'F')) { + return c - 'A' + 10; + } else { + return 256; // make it always larger than 255 + } +} + +static int decode_escaped(const char *p, string *out) +{ + char buff[256]; + char* ptr = &buff[0]; + char* max = &buff[252]; + const char *orig_p = p; + while (*p && *p != '!') { + if (*p == '#' || *p == '~') { + unsigned hex = 0; + p++; + hex = h2i(*p++) << 4; + if (hex > 255) { + return -EINVAL; + } + hex |= h2i(*p++); + if (hex > 255) { + return -EINVAL; + } + *ptr++ = hex; + } else { + *ptr++ = *p++; + } + if (ptr > max) { + out->append(buff, ptr-buff); + ptr = &buff[0]; + } + } + if (ptr != buff) { + out->append(buff, ptr-buff); + } + return p - orig_p; +} + +template<typename T> +static void _key_encode_shard(shard_id_t shard, T *key) +{ + key->push_back((char)((uint8_t)shard.id + (uint8_t)0x80)); +} + +static const char *_key_decode_shard(const char *key, shard_id_t *pshard) +{ + pshard->id = (uint8_t)*key - (uint8_t)0x80; + return key + 1; +} + +static void get_coll_range(const coll_t& cid, int bits, + ghobject_t *temp_start, ghobject_t *temp_end, + ghobject_t *start, ghobject_t *end, bool legacy) +{ + spg_t pgid; + constexpr uint32_t MAX_HASH = std::numeric_limits<uint32_t>::max(); + // use different nspaces due to we use different schemes when encoding + // keys for listing objects + const std::string_view MAX_NSPACE = legacy ? "\x7f" : "\xff"; + if (cid.is_pg(&pgid)) { + start->shard_id = pgid.shard; + *temp_start = *start; + + start->hobj.pool = pgid.pool(); + temp_start->hobj.pool = -2ll - pgid.pool(); + + *end = *start; + *temp_end = *temp_start; + + uint32_t reverse_hash = hobject_t::_reverse_bits(pgid.ps()); + start->hobj.set_bitwise_key_u32(reverse_hash); + temp_start->hobj.set_bitwise_key_u32(reverse_hash); + + uint64_t end_hash = reverse_hash + (1ull << (32 - bits)); + if (end_hash > MAX_HASH) { + // make sure end hobj is even greater than the maximum possible hobj + end->hobj.set_bitwise_key_u32(MAX_HASH); + temp_end->hobj.set_bitwise_key_u32(MAX_HASH); + end->hobj.nspace = MAX_NSPACE; + } else { + end->hobj.set_bitwise_key_u32(end_hash); + temp_end->hobj.set_bitwise_key_u32(end_hash); + } + } else { + start->shard_id = shard_id_t::NO_SHARD; + start->hobj.pool = -1ull; + + *end = *start; + start->hobj.set_bitwise_key_u32(0); + end->hobj.set_bitwise_key_u32(MAX_HASH); + end->hobj.nspace = MAX_NSPACE; + // no separate temp section + *temp_start = *end; + *temp_end = *end; + } + + start->generation = 0; + end->generation = 0; + temp_start->generation = 0; + temp_end->generation = 0; +} + +static void get_shared_blob_key(uint64_t sbid, string *key) +{ + key->clear(); + _key_encode_u64(sbid, key); +} + +static int get_key_shared_blob(const string& key, uint64_t *sbid) +{ + const char *p = key.c_str(); + if (key.length() < sizeof(uint64_t)) + return -1; + _key_decode_u64(p, sbid); + return 0; +} + +template<typename S> +static void _key_encode_prefix(const ghobject_t& oid, S *key) +{ + _key_encode_shard(oid.shard_id, key); + _key_encode_u64(oid.hobj.pool + 0x8000000000000000ull, key); + _key_encode_u32(oid.hobj.get_bitwise_key_u32(), key); +} + +static const char *_key_decode_prefix(const char *p, ghobject_t *oid) +{ + p = _key_decode_shard(p, &oid->shard_id); + + uint64_t pool; + p = _key_decode_u64(p, &pool); + oid->hobj.pool = pool - 0x8000000000000000ull; + + unsigned hash; + p = _key_decode_u32(p, &hash); + + oid->hobj.set_bitwise_key_u32(hash); + + return p; +} + +#define ENCODED_KEY_PREFIX_LEN (1 + 8 + 4) + +template<typename S> +static int get_key_object(const S& key, ghobject_t *oid) +{ + int r; + const char *p = key.c_str(); + + if (key.length() < ENCODED_KEY_PREFIX_LEN) + return -1; + + p = _key_decode_prefix(p, oid); + + if (key.length() == ENCODED_KEY_PREFIX_LEN) + return -2; + + r = decode_escaped(p, &oid->hobj.nspace); + if (r < 0) + return -2; + p += r + 1; + + string k; + r = decode_escaped(p, &k); + if (r < 0) + return -3; + p += r + 1; + if (*p == '=') { + // no key + ++p; + oid->hobj.oid.name = k; + } else if (*p == '<' || *p == '>') { + // key + name + ++p; + r = decode_escaped(p, &oid->hobj.oid.name); + if (r < 0) + return -5; + p += r + 1; + oid->hobj.set_key(k); + } else { + // malformed + return -6; + } + + p = _key_decode_u64(p, &oid->hobj.snap.val); + p = _key_decode_u64(p, &oid->generation); + + if (*p != ONODE_KEY_SUFFIX) { + return -7; + } + p++; + if (*p) { + // if we get something other than a null terminator here, + // something goes wrong. + return -8; + } + + return 0; +} + +template<typename S> +static void get_object_key(CephContext *cct, const ghobject_t& oid, S *key) +{ + key->clear(); + + size_t max_len = ENCODED_KEY_PREFIX_LEN + + (oid.hobj.nspace.length() * 3 + 1) + + (oid.hobj.get_key().length() * 3 + 1) + + 1 + // for '<', '=', or '>' + (oid.hobj.oid.name.length() * 3 + 1) + + 8 + 8 + 1; + key->reserve(max_len); + + _key_encode_prefix(oid, key); + + append_escaped(oid.hobj.nspace, key); + + if (oid.hobj.get_key().length()) { + // is a key... could be < = or >. + append_escaped(oid.hobj.get_key(), key); + // (ASCII chars < = and > sort in that order, yay) + int r = oid.hobj.get_key().compare(oid.hobj.oid.name); + if (r) { + key->append(r > 0 ? ">" : "<"); + append_escaped(oid.hobj.oid.name, key); + } else { + // same as no key + key->append("="); + } + } else { + // no key + append_escaped(oid.hobj.oid.name, key); + key->append("="); + } + + _key_encode_u64(oid.hobj.snap, key); + _key_encode_u64(oid.generation, key); + + key->push_back(ONODE_KEY_SUFFIX); + + // sanity check + if (true) { + ghobject_t t; + int r = get_key_object(*key, &t); + if (r || t != oid) { + derr << " r " << r << dendl; + derr << "key " << pretty_binary_string(*key) << dendl; + derr << "oid " << oid << dendl; + derr << " t " << t << dendl; + ceph_assert(r == 0 && t == oid); + } + } +} + +// extent shard keys are the onode key, plus a u32, plus 'x'. the trailing +// char lets us quickly test whether it is a shard key without decoding any +// of the prefix bytes. +template<typename S> +static void get_extent_shard_key(const S& onode_key, uint32_t offset, + string *key) +{ + key->clear(); + key->reserve(onode_key.length() + 4 + 1); + key->append(onode_key.c_str(), onode_key.size()); + _key_encode_u32(offset, key); + key->push_back(EXTENT_SHARD_KEY_SUFFIX); +} + +static void rewrite_extent_shard_key(uint32_t offset, string *key) +{ + ceph_assert(key->size() > sizeof(uint32_t) + 1); + ceph_assert(*key->rbegin() == EXTENT_SHARD_KEY_SUFFIX); + _key_encode_u32(offset, key->size() - sizeof(uint32_t) - 1, key); +} + +template<typename S> +static void generate_extent_shard_key_and_apply( + const S& onode_key, + uint32_t offset, + string *key, + std::function<void(const string& final_key)> apply) +{ + if (key->empty()) { // make full key + ceph_assert(!onode_key.empty()); + get_extent_shard_key(onode_key, offset, key); + } else { + rewrite_extent_shard_key(offset, key); + } + apply(*key); +} + +int get_key_extent_shard(const string& key, string *onode_key, uint32_t *offset) +{ + ceph_assert(key.size() > sizeof(uint32_t) + 1); + ceph_assert(*key.rbegin() == EXTENT_SHARD_KEY_SUFFIX); + int okey_len = key.size() - sizeof(uint32_t) - 1; + *onode_key = key.substr(0, okey_len); + const char *p = key.data() + okey_len; + _key_decode_u32(p, offset); + return 0; +} + +static bool is_extent_shard_key(const string& key) +{ + return *key.rbegin() == EXTENT_SHARD_KEY_SUFFIX; +} + +static void get_deferred_key(uint64_t seq, string *out) +{ + _key_encode_u64(seq, out); +} + +static void get_pool_stat_key(int64_t pool_id, string *key) +{ + key->clear(); + _key_encode_u64(pool_id, key); +} + +static int get_key_pool_stat(const string& key, uint64_t* pool_id) +{ + const char *p = key.c_str(); + if (key.length() < sizeof(uint64_t)) + return -1; + _key_decode_u64(p, pool_id); + return 0; +} + + +template <int LogLevelV> +void _dump_extent_map(CephContext *cct, const BlueStore::ExtentMap &em) +{ + uint64_t pos = 0; + for (auto& s : em.shards) { + dout(LogLevelV) << __func__ << " shard " << *s.shard_info + << (s.loaded ? " (loaded)" : "") + << (s.dirty ? " (dirty)" : "") + << dendl; + } + for (auto& e : em.extent_map) { + dout(LogLevelV) << __func__ << " " << e << dendl; + ceph_assert(e.logical_offset >= pos); + pos = e.logical_offset + e.length; + const bluestore_blob_t& blob = e.blob->get_blob(); + if (blob.has_csum()) { + vector<uint64_t> v; + unsigned n = blob.get_csum_count(); + for (unsigned i = 0; i < n; ++i) + v.push_back(blob.get_csum_item(i)); + dout(LogLevelV) << __func__ << " csum: " << std::hex << v << std::dec + << dendl; + } + std::lock_guard l(e.blob->shared_blob->get_cache()->lock); + for (auto& i : e.blob->shared_blob->bc.buffer_map) { + dout(LogLevelV) << __func__ << " 0x" << std::hex << i.first + << "~" << i.second->length << std::dec + << " " << *i.second << dendl; + } + } +} + +template <int LogLevelV> +void _dump_onode(CephContext *cct, const BlueStore::Onode& o) +{ + if (!cct->_conf->subsys.should_gather<ceph_subsys_bluestore, LogLevelV>()) + return; + dout(LogLevelV) << __func__ << " " << &o << " " << o.oid + << " nid " << o.onode.nid + << " size 0x" << std::hex << o.onode.size + << " (" << std::dec << o.onode.size << ")" + << " expected_object_size " << o.onode.expected_object_size + << " expected_write_size " << o.onode.expected_write_size + << " in " << o.onode.extent_map_shards.size() << " shards" + << ", " << o.extent_map.spanning_blob_map.size() + << " spanning blobs" + << dendl; + for (auto p = o.onode.attrs.begin(); + p != o.onode.attrs.end(); + ++p) { + dout(LogLevelV) << __func__ << " attr " << p->first + << " len " << p->second.length() << dendl; + } + _dump_extent_map<LogLevelV>(cct, o.extent_map); +} + +template <int LogLevelV> +void _dump_transaction(CephContext *cct, ObjectStore::Transaction *t) +{ + dout(LogLevelV) << __func__ << " transaction dump:\n"; + JSONFormatter f(true); + f.open_object_section("transaction"); + t->dump(&f); + f.close_section(); + f.flush(*_dout); + *_dout << dendl; +} + +// Buffer + +ostream& operator<<(ostream& out, const BlueStore::Buffer& b) +{ + out << "buffer(" << &b << " space " << b.space << " 0x" << std::hex + << b.offset << "~" << b.length << std::dec + << " " << BlueStore::Buffer::get_state_name(b.state); + if (b.flags) + out << " " << BlueStore::Buffer::get_flag_name(b.flags); + return out << ")"; +} + +namespace { + +/* + * Due to a bug in key string encoding (see a comment for append_escaped) + * the KeyValueDB iterator does not lexicographically sort the same + * way that ghobject_t does: objects with the same hash may have wrong order. + * + * This is the iterator wrapper that fixes the keys order. + */ + +class CollectionListIterator { +public: + CollectionListIterator(const KeyValueDB::Iterator &it) + : m_it(it) { + } + virtual ~CollectionListIterator() { + } + + virtual bool valid() const = 0; + virtual const ghobject_t &oid() const = 0; + virtual void lower_bound(const ghobject_t &oid) = 0; + virtual void upper_bound(const ghobject_t &oid) = 0; + virtual void next() = 0; + + virtual int cmp(const ghobject_t &oid) const = 0; + + bool is_ge(const ghobject_t &oid) const { + return cmp(oid) >= 0; + } + + bool is_lt(const ghobject_t &oid) const { + return cmp(oid) < 0; + } + +protected: + KeyValueDB::Iterator m_it; +}; + +class SimpleCollectionListIterator : public CollectionListIterator { +public: + SimpleCollectionListIterator(CephContext *cct, const KeyValueDB::Iterator &it) + : CollectionListIterator(it), m_cct(cct) { + } + + bool valid() const override { + return m_it->valid(); + } + + const ghobject_t &oid() const override { + ceph_assert(valid()); + + return m_oid; + } + + void lower_bound(const ghobject_t &oid) override { + string key; + get_object_key(m_cct, oid, &key); + + m_it->lower_bound(key); + get_oid(); + } + + void upper_bound(const ghobject_t &oid) override { + string key; + get_object_key(m_cct, oid, &key); + + m_it->upper_bound(key); + get_oid(); + } + + void next() override { + ceph_assert(valid()); + + m_it->next(); + get_oid(); + } + + int cmp(const ghobject_t &oid) const override { + ceph_assert(valid()); + + string key; + get_object_key(m_cct, oid, &key); + + return m_it->key().compare(key); + } + +private: + CephContext *m_cct; + ghobject_t m_oid; + + void get_oid() { + m_oid = ghobject_t(); + while (m_it->valid() && is_extent_shard_key(m_it->key())) { + m_it->next(); + } + if (!valid()) { + return; + } + + int r = get_key_object(m_it->key(), &m_oid); + ceph_assert(r == 0); + } +}; + +class SortedCollectionListIterator : public CollectionListIterator { +public: + SortedCollectionListIterator(const KeyValueDB::Iterator &it) + : CollectionListIterator(it), m_chunk_iter(m_chunk.end()) { + } + + bool valid() const override { + return m_chunk_iter != m_chunk.end(); + } + + const ghobject_t &oid() const override { + ceph_assert(valid()); + + return m_chunk_iter->first; + } + + void lower_bound(const ghobject_t &oid) override { + std::string key; + _key_encode_prefix(oid, &key); + + m_it->lower_bound(key); + m_chunk_iter = m_chunk.end(); + if (!get_next_chunk()) { + return; + } + + if (this->oid().shard_id != oid.shard_id || + this->oid().hobj.pool != oid.hobj.pool || + this->oid().hobj.get_bitwise_key_u32() != oid.hobj.get_bitwise_key_u32()) { + return; + } + + m_chunk_iter = m_chunk.lower_bound(oid); + if (m_chunk_iter == m_chunk.end()) { + get_next_chunk(); + } + } + + void upper_bound(const ghobject_t &oid) override { + lower_bound(oid); + + if (valid() && this->oid() == oid) { + next(); + } + } + + void next() override { + ceph_assert(valid()); + + m_chunk_iter++; + if (m_chunk_iter == m_chunk.end()) { + get_next_chunk(); + } + } + + int cmp(const ghobject_t &oid) const override { + ceph_assert(valid()); + + if (this->oid() < oid) { + return -1; + } + if (this->oid() > oid) { + return 1; + } + return 0; + } + +private: + std::map<ghobject_t, std::string> m_chunk; + std::map<ghobject_t, std::string>::iterator m_chunk_iter; + + bool get_next_chunk() { + while (m_it->valid() && is_extent_shard_key(m_it->key())) { + m_it->next(); + } + + if (!m_it->valid()) { + return false; + } + + ghobject_t oid; + int r = get_key_object(m_it->key(), &oid); + ceph_assert(r == 0); + + m_chunk.clear(); + while (true) { + m_chunk.insert({oid, m_it->key()}); + + do { + m_it->next(); + } while (m_it->valid() && is_extent_shard_key(m_it->key())); + + if (!m_it->valid()) { + break; + } + + ghobject_t next; + r = get_key_object(m_it->key(), &next); + ceph_assert(r == 0); + if (next.shard_id != oid.shard_id || + next.hobj.pool != oid.hobj.pool || + next.hobj.get_bitwise_key_u32() != oid.hobj.get_bitwise_key_u32()) { + break; + } + oid = next; + } + + m_chunk_iter = m_chunk.begin(); + return true; + } +}; + +} // anonymous namespace + +// Garbage Collector + +void BlueStore::GarbageCollector::process_protrusive_extents( + const BlueStore::ExtentMap& extent_map, + uint64_t start_offset, + uint64_t end_offset, + uint64_t start_touch_offset, + uint64_t end_touch_offset, + uint64_t min_alloc_size) +{ + ceph_assert(start_offset <= start_touch_offset && end_offset>= end_touch_offset); + + uint64_t lookup_start_offset = p2align(start_offset, min_alloc_size); + uint64_t lookup_end_offset = round_up_to(end_offset, min_alloc_size); + + dout(30) << __func__ << " (hex): [" << std::hex + << lookup_start_offset << ", " << lookup_end_offset + << ")" << std::dec << dendl; + + for (auto it = extent_map.seek_lextent(lookup_start_offset); + it != extent_map.extent_map.end() && + it->logical_offset < lookup_end_offset; + ++it) { + uint64_t alloc_unit_start = it->logical_offset / min_alloc_size; + uint64_t alloc_unit_end = (it->logical_end() - 1) / min_alloc_size; + + dout(30) << __func__ << " " << *it + << "alloc_units: " << alloc_unit_start << ".." << alloc_unit_end + << dendl; + + Blob* b = it->blob.get(); + + if (it->logical_offset >=start_touch_offset && + it->logical_end() <= end_touch_offset) { + // Process extents within the range affected by + // the current write request. + // Need to take into account if existing extents + // can be merged with them (uncompressed case) + if (!b->get_blob().is_compressed()) { + if (blob_info_counted && used_alloc_unit == alloc_unit_start) { + --blob_info_counted->expected_allocations; // don't need to allocate + // new AU for compressed + // data since another + // collocated uncompressed + // blob already exists + dout(30) << __func__ << " --expected:" + << alloc_unit_start << dendl; + } + used_alloc_unit = alloc_unit_end; + blob_info_counted = nullptr; + } + } else if (b->get_blob().is_compressed()) { + + // additionally we take compressed blobs that were not impacted + // by the write into account too + BlobInfo& bi = + affected_blobs.emplace( + b, BlobInfo(b->get_referenced_bytes())).first->second; + + int adjust = + (used_alloc_unit && used_alloc_unit == alloc_unit_start) ? 0 : 1; + bi.expected_allocations += alloc_unit_end - alloc_unit_start + adjust; + dout(30) << __func__ << " expected_allocations=" + << bi.expected_allocations << " end_au:" + << alloc_unit_end << dendl; + + blob_info_counted = &bi; + used_alloc_unit = alloc_unit_end; + + ceph_assert(it->length <= bi.referenced_bytes); + bi.referenced_bytes -= it->length; + dout(30) << __func__ << " affected_blob:" << *b + << " unref 0x" << std::hex << it->length + << " referenced = 0x" << bi.referenced_bytes + << std::dec << dendl; + // NOTE: we can't move specific blob to resulting GC list here + // when reference counter == 0 since subsequent extents might + // decrement its expected_allocation. + // Hence need to enumerate all the extents first. + if (!bi.collect_candidate) { + bi.first_lextent = it; + bi.collect_candidate = true; + } + bi.last_lextent = it; + } else { + if (blob_info_counted && used_alloc_unit == alloc_unit_start) { + // don't need to allocate new AU for compressed data since another + // collocated uncompressed blob already exists + --blob_info_counted->expected_allocations; + dout(30) << __func__ << " --expected_allocations:" + << alloc_unit_start << dendl; + } + used_alloc_unit = alloc_unit_end; + blob_info_counted = nullptr; + } + } + + for (auto b_it = affected_blobs.begin(); + b_it != affected_blobs.end(); + ++b_it) { + Blob* b = b_it->first; + BlobInfo& bi = b_it->second; + if (bi.referenced_bytes == 0) { + uint64_t len_on_disk = b_it->first->get_blob().get_ondisk_length(); + int64_t blob_expected_for_release = + round_up_to(len_on_disk, min_alloc_size) / min_alloc_size; + + dout(30) << __func__ << " " << *(b_it->first) + << " expected4release=" << blob_expected_for_release + << " expected_allocations=" << bi.expected_allocations + << dendl; + int64_t benefit = blob_expected_for_release - bi.expected_allocations; + if (benefit >= g_conf()->bluestore_gc_enable_blob_threshold) { + if (bi.collect_candidate) { + auto it = bi.first_lextent; + bool bExit = false; + do { + if (it->blob.get() == b) { + extents_to_collect.insert(it->logical_offset, it->length); + } + bExit = it == bi.last_lextent; + ++it; + } while (!bExit); + } + expected_for_release += blob_expected_for_release; + expected_allocations += bi.expected_allocations; + } + } + } +} + +int64_t BlueStore::GarbageCollector::estimate( + uint64_t start_offset, + uint64_t length, + const BlueStore::ExtentMap& extent_map, + const BlueStore::old_extent_map_t& old_extents, + uint64_t min_alloc_size) +{ + + affected_blobs.clear(); + extents_to_collect.clear(); + used_alloc_unit = boost::optional<uint64_t >(); + blob_info_counted = nullptr; + + uint64_t gc_start_offset = start_offset; + uint64_t gc_end_offset = start_offset + length; + + uint64_t end_offset = start_offset + length; + + for (auto it = old_extents.begin(); it != old_extents.end(); ++it) { + Blob* b = it->e.blob.get(); + if (b->get_blob().is_compressed()) { + + // update gc_start_offset/gc_end_offset if needed + gc_start_offset = min(gc_start_offset, (uint64_t)it->e.blob_start()); + gc_end_offset = std::max(gc_end_offset, (uint64_t)it->e.blob_end()); + + auto o = it->e.logical_offset; + auto l = it->e.length; + + uint64_t ref_bytes = b->get_referenced_bytes(); + // micro optimization to bypass blobs that have no more references + if (ref_bytes != 0) { + dout(30) << __func__ << " affected_blob:" << *b + << " unref 0x" << std::hex << o << "~" << l + << std::dec << dendl; + affected_blobs.emplace(b, BlobInfo(ref_bytes)); + } + } + } + dout(30) << __func__ << " gc range(hex): [" << std::hex + << gc_start_offset << ", " << gc_end_offset + << ")" << std::dec << dendl; + + // enumerate preceeding extents to check if they reference affected blobs + if (gc_start_offset < start_offset || gc_end_offset > end_offset) { + process_protrusive_extents(extent_map, + gc_start_offset, + gc_end_offset, + start_offset, + end_offset, + min_alloc_size); + } + return expected_for_release - expected_allocations; +} + +// LruOnodeCacheShard +struct LruOnodeCacheShard : public BlueStore::OnodeCacheShard { + typedef boost::intrusive::list< + BlueStore::Onode, + boost::intrusive::member_hook< + BlueStore::Onode, + boost::intrusive::list_member_hook<>, + &BlueStore::Onode::lru_item> > list_t; + + list_t lru; + + explicit LruOnodeCacheShard(CephContext *cct) : BlueStore::OnodeCacheShard(cct) {} + + void _add(BlueStore::Onode* o, int level) override + { + if (o->put_cache()) { + (level > 0) ? lru.push_front(*o) : lru.push_back(*o); + } else { + ++num_pinned; + } + ++num; // we count both pinned and unpinned entries + dout(20) << __func__ << " " << this << " " << o->oid << " added, num=" << num << dendl; + } + void _rm(BlueStore::Onode* o) override + { + if (o->pop_cache()) { + lru.erase(lru.iterator_to(*o)); + } else { + ceph_assert(num_pinned); + --num_pinned; + } + ceph_assert(num); + --num; + dout(20) << __func__ << " " << this << " " << " " << o->oid << " removed, num=" << num << dendl; + } + void _pin(BlueStore::Onode* o) override + { + lru.erase(lru.iterator_to(*o)); + ++num_pinned; + dout(20) << __func__ << this << " " << " " << " " << o->oid << " pinned" << dendl; + } + void _unpin(BlueStore::Onode* o) override + { + lru.push_front(*o); + ceph_assert(num_pinned); + --num_pinned; + dout(20) << __func__ << this << " " << " " << " " << o->oid << " unpinned" << dendl; + } + void _unpin_and_rm(BlueStore::Onode* o) override + { + o->pop_cache(); + ceph_assert(num_pinned); + --num_pinned; + ceph_assert(num); + --num; + } + void _trim_to(uint64_t new_size) override + { + if (new_size >= lru.size()) { + return; // don't even try + } + uint64_t n = lru.size() - new_size; + auto p = lru.end(); + ceph_assert(p != lru.begin()); + --p; + ceph_assert(num >= n); + num -= n; + while (n-- > 0) { + BlueStore::Onode *o = &*p; + dout(20) << __func__ << " rm " << o->oid << " " + << o->nref << " " << o->cached << " " << o->pinned << dendl; + if (p != lru.begin()) { + lru.erase(p--); + } else { + ceph_assert(n == 0); + lru.erase(p); + } + auto pinned = !o->pop_cache(); + ceph_assert(!pinned); + o->c->onode_map._remove(o->oid); + } + } + void move_pinned(OnodeCacheShard *to, BlueStore::Onode *o) override + { + if (to == this) { + return; + } + ceph_assert(o->cached); + ceph_assert(o->pinned); + ceph_assert(num); + ceph_assert(num_pinned); + --num_pinned; + --num; + ++to->num_pinned; + ++to->num; + } + void add_stats(uint64_t *onodes, uint64_t *pinned_onodes) override + { + *onodes += num; + *pinned_onodes += num_pinned; + } +}; + +// OnodeCacheShard +BlueStore::OnodeCacheShard *BlueStore::OnodeCacheShard::create( + CephContext* cct, + string type, + PerfCounters *logger) +{ + BlueStore::OnodeCacheShard *c = nullptr; + // Currently we only implement an LRU cache for onodes + c = new LruOnodeCacheShard(cct); + c->logger = logger; + return c; +} + +// LruBufferCacheShard +struct LruBufferCacheShard : public BlueStore::BufferCacheShard { + typedef boost::intrusive::list< + BlueStore::Buffer, + boost::intrusive::member_hook< + BlueStore::Buffer, + boost::intrusive::list_member_hook<>, + &BlueStore::Buffer::lru_item> > list_t; + list_t lru; + + explicit LruBufferCacheShard(CephContext *cct) : BlueStore::BufferCacheShard(cct) {} + + void _add(BlueStore::Buffer *b, int level, BlueStore::Buffer *near) override { + if (near) { + auto q = lru.iterator_to(*near); + lru.insert(q, *b); + } else if (level > 0) { + lru.push_front(*b); + } else { + lru.push_back(*b); + } + buffer_bytes += b->length; + num = lru.size(); + } + void _rm(BlueStore::Buffer *b) override { + ceph_assert(buffer_bytes >= b->length); + buffer_bytes -= b->length; + auto q = lru.iterator_to(*b); + lru.erase(q); + num = lru.size(); + } + void _move(BlueStore::BufferCacheShard *src, BlueStore::Buffer *b) override { + src->_rm(b); + _add(b, 0, nullptr); + } + void _adjust_size(BlueStore::Buffer *b, int64_t delta) override { + ceph_assert((int64_t)buffer_bytes + delta >= 0); + buffer_bytes += delta; + } + void _touch(BlueStore::Buffer *b) override { + auto p = lru.iterator_to(*b); + lru.erase(p); + lru.push_front(*b); + num = lru.size(); + _audit("_touch_buffer end"); + } + + void _trim_to(uint64_t max) override + { + while (buffer_bytes > max) { + auto i = lru.rbegin(); + if (i == lru.rend()) { + // stop if lru is now empty + break; + } + + BlueStore::Buffer *b = &*i; + ceph_assert(b->is_clean()); + dout(20) << __func__ << " rm " << *b << dendl; + b->space->_rm_buffer(this, b); + } + num = lru.size(); + } + + void add_stats(uint64_t *extents, + uint64_t *blobs, + uint64_t *buffers, + uint64_t *bytes) override { + *extents += num_extents; + *blobs += num_blobs; + *buffers += num; + *bytes += buffer_bytes; + } +#ifdef DEBUG_CACHE + void _audit(const char *s) override + { + dout(10) << __func__ << " " << when << " start" << dendl; + uint64_t s = 0; + for (auto i = lru.begin(); i != lru.end(); ++i) { + s += i->length; + } + if (s != buffer_bytes) { + derr << __func__ << " buffer_size " << buffer_bytes << " actual " << s + << dendl; + for (auto i = lru.begin(); i != lru.end(); ++i) { + derr << __func__ << " " << *i << dendl; + } + ceph_assert(s == buffer_bytes); + } + dout(20) << __func__ << " " << when << " buffer_bytes " << buffer_bytes + << " ok" << dendl; + } +#endif +}; + +// TwoQBufferCacheShard + +struct TwoQBufferCacheShard : public BlueStore::BufferCacheShard { + typedef boost::intrusive::list< + BlueStore::Buffer, + boost::intrusive::member_hook< + BlueStore::Buffer, + boost::intrusive::list_member_hook<>, + &BlueStore::Buffer::lru_item> > list_t; + list_t hot; ///< "Am" hot buffers + list_t warm_in; ///< "A1in" newly warm buffers + list_t warm_out; ///< "A1out" empty buffers we've evicted + + enum { + BUFFER_NEW = 0, + BUFFER_WARM_IN, ///< in warm_in + BUFFER_WARM_OUT, ///< in warm_out + BUFFER_HOT, ///< in hot + BUFFER_TYPE_MAX + }; + + uint64_t list_bytes[BUFFER_TYPE_MAX] = {0}; ///< bytes per type + +public: + explicit TwoQBufferCacheShard(CephContext *cct) : BufferCacheShard(cct) {} + + void _add(BlueStore::Buffer *b, int level, BlueStore::Buffer *near) override + { + dout(20) << __func__ << " level " << level << " near " << near + << " on " << *b + << " which has cache_private " << b->cache_private << dendl; + if (near) { + b->cache_private = near->cache_private; + switch (b->cache_private) { + case BUFFER_WARM_IN: + warm_in.insert(warm_in.iterator_to(*near), *b); + break; + case BUFFER_WARM_OUT: + ceph_assert(b->is_empty()); + warm_out.insert(warm_out.iterator_to(*near), *b); + break; + case BUFFER_HOT: + hot.insert(hot.iterator_to(*near), *b); + break; + default: + ceph_abort_msg("bad cache_private"); + } + } else if (b->cache_private == BUFFER_NEW) { + b->cache_private = BUFFER_WARM_IN; + if (level > 0) { + warm_in.push_front(*b); + } else { + // take caller hint to start at the back of the warm queue + warm_in.push_back(*b); + } + } else { + // we got a hint from discard + switch (b->cache_private) { + case BUFFER_WARM_IN: + // stay in warm_in. move to front, even though 2Q doesn't actually + // do this. + dout(20) << __func__ << " move to front of warm " << *b << dendl; + warm_in.push_front(*b); + break; + case BUFFER_WARM_OUT: + b->cache_private = BUFFER_HOT; + // move to hot. fall-thru + case BUFFER_HOT: + dout(20) << __func__ << " move to front of hot " << *b << dendl; + hot.push_front(*b); + break; + default: + ceph_abort_msg("bad cache_private"); + } + } + if (!b->is_empty()) { + buffer_bytes += b->length; + list_bytes[b->cache_private] += b->length; + } + num = hot.size() + warm_in.size(); + } + + void _rm(BlueStore::Buffer *b) override + { + dout(20) << __func__ << " " << *b << dendl; + if (!b->is_empty()) { + ceph_assert(buffer_bytes >= b->length); + buffer_bytes -= b->length; + ceph_assert(list_bytes[b->cache_private] >= b->length); + list_bytes[b->cache_private] -= b->length; + } + switch (b->cache_private) { + case BUFFER_WARM_IN: + warm_in.erase(warm_in.iterator_to(*b)); + break; + case BUFFER_WARM_OUT: + warm_out.erase(warm_out.iterator_to(*b)); + break; + case BUFFER_HOT: + hot.erase(hot.iterator_to(*b)); + break; + default: + ceph_abort_msg("bad cache_private"); + } + num = hot.size() + warm_in.size(); + } + + void _move(BlueStore::BufferCacheShard *srcc, BlueStore::Buffer *b) override + { + TwoQBufferCacheShard *src = static_cast<TwoQBufferCacheShard*>(srcc); + src->_rm(b); + + // preserve which list we're on (even if we can't preserve the order!) + switch (b->cache_private) { + case BUFFER_WARM_IN: + ceph_assert(!b->is_empty()); + warm_in.push_back(*b); + break; + case BUFFER_WARM_OUT: + ceph_assert(b->is_empty()); + warm_out.push_back(*b); + break; + case BUFFER_HOT: + ceph_assert(!b->is_empty()); + hot.push_back(*b); + break; + default: + ceph_abort_msg("bad cache_private"); + } + if (!b->is_empty()) { + buffer_bytes += b->length; + list_bytes[b->cache_private] += b->length; + } + num = hot.size() + warm_in.size(); + } + + void _adjust_size(BlueStore::Buffer *b, int64_t delta) override + { + dout(20) << __func__ << " delta " << delta << " on " << *b << dendl; + if (!b->is_empty()) { + ceph_assert((int64_t)buffer_bytes + delta >= 0); + buffer_bytes += delta; + ceph_assert((int64_t)list_bytes[b->cache_private] + delta >= 0); + list_bytes[b->cache_private] += delta; + } + } + + void _touch(BlueStore::Buffer *b) override { + switch (b->cache_private) { + case BUFFER_WARM_IN: + // do nothing (somewhat counter-intuitively!) + break; + case BUFFER_WARM_OUT: + // move from warm_out to hot LRU + ceph_abort_msg("this happens via discard hint"); + break; + case BUFFER_HOT: + // move to front of hot LRU + hot.erase(hot.iterator_to(*b)); + hot.push_front(*b); + break; + } + num = hot.size() + warm_in.size(); + _audit("_touch_buffer end"); + } + + void _trim_to(uint64_t max) override + { + if (buffer_bytes > max) { + uint64_t kin = max * cct->_conf->bluestore_2q_cache_kin_ratio; + uint64_t khot = max - kin; + + // pre-calculate kout based on average buffer size too, + // which is typical(the warm_in and hot lists may change later) + uint64_t kout = 0; + uint64_t buffer_num = hot.size() + warm_in.size(); + if (buffer_num) { + uint64_t avg_size = buffer_bytes / buffer_num; + ceph_assert(avg_size); + uint64_t calculated_num = max / avg_size; + kout = calculated_num * cct->_conf->bluestore_2q_cache_kout_ratio; + } + + if (list_bytes[BUFFER_HOT] < khot) { + // hot is small, give slack to warm_in + kin += khot - list_bytes[BUFFER_HOT]; + } else if (list_bytes[BUFFER_WARM_IN] < kin) { + // warm_in is small, give slack to hot + khot += kin - list_bytes[BUFFER_WARM_IN]; + } + + // adjust warm_in list + int64_t to_evict_bytes = list_bytes[BUFFER_WARM_IN] - kin; + uint64_t evicted = 0; + + while (to_evict_bytes > 0) { + auto p = warm_in.rbegin(); + if (p == warm_in.rend()) { + // stop if warm_in list is now empty + break; + } + + BlueStore::Buffer *b = &*p; + ceph_assert(b->is_clean()); + dout(20) << __func__ << " buffer_warm_in -> out " << *b << dendl; + ceph_assert(buffer_bytes >= b->length); + buffer_bytes -= b->length; + ceph_assert(list_bytes[BUFFER_WARM_IN] >= b->length); + list_bytes[BUFFER_WARM_IN] -= b->length; + to_evict_bytes -= b->length; + evicted += b->length; + b->state = BlueStore::Buffer::STATE_EMPTY; + b->data.clear(); + warm_in.erase(warm_in.iterator_to(*b)); + warm_out.push_front(*b); + b->cache_private = BUFFER_WARM_OUT; + } + + if (evicted > 0) { + dout(20) << __func__ << " evicted " << byte_u_t(evicted) + << " from warm_in list, done evicting warm_in buffers" + << dendl; + } + + // adjust hot list + to_evict_bytes = list_bytes[BUFFER_HOT] - khot; + evicted = 0; + + while (to_evict_bytes > 0) { + auto p = hot.rbegin(); + if (p == hot.rend()) { + // stop if hot list is now empty + break; + } + + BlueStore::Buffer *b = &*p; + dout(20) << __func__ << " buffer_hot rm " << *b << dendl; + ceph_assert(b->is_clean()); + // adjust evict size before buffer goes invalid + to_evict_bytes -= b->length; + evicted += b->length; + b->space->_rm_buffer(this, b); + } + + if (evicted > 0) { + dout(20) << __func__ << " evicted " << byte_u_t(evicted) + << " from hot list, done evicting hot buffers" + << dendl; + } + + // adjust warm out list too, if necessary + int64_t n = warm_out.size() - kout; + while (n-- > 0) { + BlueStore::Buffer *b = &*warm_out.rbegin(); + ceph_assert(b->is_empty()); + dout(20) << __func__ << " buffer_warm_out rm " << *b << dendl; + b->space->_rm_buffer(this, b); + } + } + num = hot.size() + warm_in.size(); + } + + void add_stats(uint64_t *extents, + uint64_t *blobs, + uint64_t *buffers, + uint64_t *bytes) override { + *extents += num_extents; + *blobs += num_blobs; + *buffers += num; + *bytes += buffer_bytes; + } + +#ifdef DEBUG_CACHE + void _audit(const char *s) override + { + dout(10) << __func__ << " " << when << " start" << dendl; + uint64_t s = 0; + for (auto i = hot.begin(); i != hot.end(); ++i) { + s += i->length; + } + + uint64_t hot_bytes = s; + if (hot_bytes != list_bytes[BUFFER_HOT]) { + derr << __func__ << " hot_list_bytes " + << list_bytes[BUFFER_HOT] + << " != actual " << hot_bytes + << dendl; + ceph_assert(hot_bytes == list_bytes[BUFFER_HOT]); + } + + for (auto i = warm_in.begin(); i != warm_in.end(); ++i) { + s += i->length; + } + + uint64_t warm_in_bytes = s - hot_bytes; + if (warm_in_bytes != list_bytes[BUFFER_WARM_IN]) { + derr << __func__ << " warm_in_list_bytes " + << list_bytes[BUFFER_WARM_IN] + << " != actual " << warm_in_bytes + << dendl; + ceph_assert(warm_in_bytes == list_bytes[BUFFER_WARM_IN]); + } + + if (s != buffer_bytes) { + derr << __func__ << " buffer_bytes " << buffer_bytes << " actual " << s + << dendl; + ceph_assert(s == buffer_bytes); + } + + dout(20) << __func__ << " " << when << " buffer_bytes " << buffer_bytes + << " ok" << dendl; + } +#endif +}; + +// BuferCacheShard + +BlueStore::BufferCacheShard *BlueStore::BufferCacheShard::create( + CephContext* cct, + string type, + PerfCounters *logger) +{ + BufferCacheShard *c = nullptr; + if (type == "lru") + c = new LruBufferCacheShard(cct); + else if (type == "2q") + c = new TwoQBufferCacheShard(cct); + else + ceph_abort_msg("unrecognized cache type"); + c->logger = logger; + return c; +} + +// BufferSpace + +#undef dout_prefix +#define dout_prefix *_dout << "bluestore.BufferSpace(" << this << " in " << cache << ") " + +void BlueStore::BufferSpace::_clear(BufferCacheShard* cache) +{ + // note: we already hold cache->lock + ldout(cache->cct, 20) << __func__ << dendl; + while (!buffer_map.empty()) { + _rm_buffer(cache, buffer_map.begin()); + } +} + +int BlueStore::BufferSpace::_discard(BufferCacheShard* cache, uint32_t offset, uint32_t length) +{ + // note: we already hold cache->lock + ldout(cache->cct, 20) << __func__ << std::hex << " 0x" << offset << "~" << length + << std::dec << dendl; + int cache_private = 0; + cache->_audit("discard start"); + auto i = _data_lower_bound(offset); + uint32_t end = offset + length; + while (i != buffer_map.end()) { + Buffer *b = i->second.get(); + if (b->offset >= end) { + break; + } + if (b->cache_private > cache_private) { + cache_private = b->cache_private; + } + if (b->offset < offset) { + int64_t front = offset - b->offset; + if (b->end() > end) { + // drop middle (split) + uint32_t tail = b->end() - end; + if (b->data.length()) { + bufferlist bl; + bl.substr_of(b->data, b->length - tail, tail); + Buffer *nb = new Buffer(this, b->state, b->seq, end, bl, b->flags); + nb->maybe_rebuild(); + _add_buffer(cache, nb, 0, b); + } else { + _add_buffer(cache, new Buffer(this, b->state, b->seq, end, tail, + b->flags), + 0, b); + } + if (!b->is_writing()) { + cache->_adjust_size(b, front - (int64_t)b->length); + } + b->truncate(front); + b->maybe_rebuild(); + cache->_audit("discard end 1"); + break; + } else { + // drop tail + if (!b->is_writing()) { + cache->_adjust_size(b, front - (int64_t)b->length); + } + b->truncate(front); + b->maybe_rebuild(); + ++i; + continue; + } + } + if (b->end() <= end) { + // drop entire buffer + _rm_buffer(cache, i++); + continue; + } + // drop front + uint32_t keep = b->end() - end; + if (b->data.length()) { + bufferlist bl; + bl.substr_of(b->data, b->length - keep, keep); + Buffer *nb = new Buffer(this, b->state, b->seq, end, bl, b->flags); + nb->maybe_rebuild(); + _add_buffer(cache, nb, 0, b); + } else { + _add_buffer(cache, new Buffer(this, b->state, b->seq, end, keep, + b->flags), + 0, b); + } + _rm_buffer(cache, i); + cache->_audit("discard end 2"); + break; + } + return cache_private; +} + +void BlueStore::BufferSpace::read( + BufferCacheShard* cache, + uint32_t offset, + uint32_t length, + BlueStore::ready_regions_t& res, + interval_set<uint32_t>& res_intervals, + int flags) +{ + res.clear(); + res_intervals.clear(); + uint32_t want_bytes = length; + uint32_t end = offset + length; + + { + std::lock_guard l(cache->lock); + for (auto i = _data_lower_bound(offset); + i != buffer_map.end() && offset < end && i->first < end; + ++i) { + Buffer *b = i->second.get(); + ceph_assert(b->end() > offset); + + bool val = false; + if (flags & BYPASS_CLEAN_CACHE) + val = b->is_writing(); + else + val = b->is_writing() || b->is_clean(); + if (val) { + if (b->offset < offset) { + uint32_t skip = offset - b->offset; + uint32_t l = min(length, b->length - skip); + res[offset].substr_of(b->data, skip, l); + res_intervals.insert(offset, l); + offset += l; + length -= l; + if (!b->is_writing()) { + cache->_touch(b); + } + continue; + } + if (b->offset > offset) { + uint32_t gap = b->offset - offset; + if (length <= gap) { + break; + } + offset += gap; + length -= gap; + } + if (!b->is_writing()) { + cache->_touch(b); + } + if (b->length > length) { + res[offset].substr_of(b->data, 0, length); + res_intervals.insert(offset, length); + break; + } else { + res[offset].append(b->data); + res_intervals.insert(offset, b->length); + if (b->length == length) + break; + offset += b->length; + length -= b->length; + } + } + } + } + + uint64_t hit_bytes = res_intervals.size(); + ceph_assert(hit_bytes <= want_bytes); + uint64_t miss_bytes = want_bytes - hit_bytes; + cache->logger->inc(l_bluestore_buffer_hit_bytes, hit_bytes); + cache->logger->inc(l_bluestore_buffer_miss_bytes, miss_bytes); +} + +void BlueStore::BufferSpace::_finish_write(BufferCacheShard* cache, uint64_t seq) +{ + auto i = writing.begin(); + while (i != writing.end()) { + if (i->seq > seq) { + break; + } + if (i->seq < seq) { + ++i; + continue; + } + + Buffer *b = &*i; + ceph_assert(b->is_writing()); + + if (b->flags & Buffer::FLAG_NOCACHE) { + writing.erase(i++); + ldout(cache->cct, 20) << __func__ << " discard " << *b << dendl; + buffer_map.erase(b->offset); + } else { + b->state = Buffer::STATE_CLEAN; + writing.erase(i++); + b->maybe_rebuild(); + b->data.reassign_to_mempool(mempool::mempool_bluestore_cache_data); + cache->_add(b, 1, nullptr); + ldout(cache->cct, 20) << __func__ << " added " << *b << dendl; + } + } + cache->_trim(); + cache->_audit("finish_write end"); +} + +void BlueStore::BufferSpace::split(BufferCacheShard* cache, size_t pos, BlueStore::BufferSpace &r) +{ + std::lock_guard lk(cache->lock); + if (buffer_map.empty()) + return; + + auto p = --buffer_map.end(); + while (true) { + if (p->second->end() <= pos) + break; + + if (p->second->offset < pos) { + ldout(cache->cct, 30) << __func__ << " cut " << *p->second << dendl; + size_t left = pos - p->second->offset; + size_t right = p->second->length - left; + if (p->second->data.length()) { + bufferlist bl; + bl.substr_of(p->second->data, left, right); + r._add_buffer(cache, new Buffer(&r, p->second->state, p->second->seq, + 0, bl, p->second->flags), + 0, p->second.get()); + } else { + r._add_buffer(cache, new Buffer(&r, p->second->state, p->second->seq, + 0, right, p->second->flags), + 0, p->second.get()); + } + cache->_adjust_size(p->second.get(), -right); + p->second->truncate(left); + break; + } + + ceph_assert(p->second->end() > pos); + ldout(cache->cct, 30) << __func__ << " move " << *p->second << dendl; + if (p->second->data.length()) { + r._add_buffer(cache, new Buffer(&r, p->second->state, p->second->seq, + p->second->offset - pos, p->second->data, p->second->flags), + 0, p->second.get()); + } else { + r._add_buffer(cache, new Buffer(&r, p->second->state, p->second->seq, + p->second->offset - pos, p->second->length, p->second->flags), + 0, p->second.get()); + } + if (p == buffer_map.begin()) { + _rm_buffer(cache, p); + break; + } else { + _rm_buffer(cache, p--); + } + } + ceph_assert(writing.empty()); + cache->_trim(); +} + +// OnodeSpace + +#undef dout_prefix +#define dout_prefix *_dout << "bluestore.OnodeSpace(" << this << " in " << cache << ") " + +BlueStore::OnodeRef BlueStore::OnodeSpace::add(const ghobject_t& oid, + OnodeRef& o) +{ + std::lock_guard l(cache->lock); + auto p = onode_map.find(oid); + if (p != onode_map.end()) { + ldout(cache->cct, 30) << __func__ << " " << oid << " " << o + << " raced, returning existing " << p->second + << dendl; + return p->second; + } + ldout(cache->cct, 20) << __func__ << " " << oid << " " << o << dendl; + onode_map[oid] = o; + cache->_add(o.get(), 1); + cache->_trim(); + return o; +} + +void BlueStore::OnodeSpace::_remove(const ghobject_t& oid) +{ + ldout(cache->cct, 20) << __func__ << " " << oid << " " << dendl; + onode_map.erase(oid); +} + +BlueStore::OnodeRef BlueStore::OnodeSpace::lookup(const ghobject_t& oid) +{ + ldout(cache->cct, 30) << __func__ << dendl; + OnodeRef o; + bool hit = false; + + { + std::lock_guard l(cache->lock); + ceph::unordered_map<ghobject_t,OnodeRef>::iterator p = onode_map.find(oid); + if (p == onode_map.end()) { + ldout(cache->cct, 30) << __func__ << " " << oid << " miss" << dendl; + } else { + ldout(cache->cct, 30) << __func__ << " " << oid << " hit " << p->second + << " " << p->second->nref + << " " << p->second->cached + << " " << p->second->pinned + << dendl; + // This will pin onode and implicitly touch the cache when Onode + // eventually will become unpinned + o = p->second; + ceph_assert(!o->cached || o->pinned); + + hit = true; + } + } + + if (hit) { + cache->logger->inc(l_bluestore_onode_hits); + } else { + cache->logger->inc(l_bluestore_onode_misses); + } + return o; +} + +void BlueStore::OnodeSpace::clear() +{ + std::lock_guard l(cache->lock); + ldout(cache->cct, 10) << __func__ << " " << onode_map.size()<< dendl; + for (auto &p : onode_map) { + cache->_rm(p.second.get()); + } + onode_map.clear(); +} + +bool BlueStore::OnodeSpace::empty() +{ + std::lock_guard l(cache->lock); + return onode_map.empty(); +} + +void BlueStore::OnodeSpace::rename( + OnodeRef& oldo, + const ghobject_t& old_oid, + const ghobject_t& new_oid, + const mempool::bluestore_cache_meta::string& new_okey) +{ + std::lock_guard l(cache->lock); + ldout(cache->cct, 30) << __func__ << " " << old_oid << " -> " << new_oid + << dendl; + ceph::unordered_map<ghobject_t,OnodeRef>::iterator po, pn; + po = onode_map.find(old_oid); + pn = onode_map.find(new_oid); + ceph_assert(po != pn); + + ceph_assert(po != onode_map.end()); + if (pn != onode_map.end()) { + ldout(cache->cct, 30) << __func__ << " removing target " << pn->second + << dendl; + cache->_rm(pn->second.get()); + onode_map.erase(pn); + } + OnodeRef o = po->second; + + // install a non-existent onode at old location + oldo.reset(new Onode(o->c, old_oid, o->key)); + po->second = oldo; + cache->_add(oldo.get(), 1); + // add at new position and fix oid, key. + // This will pin 'o' and implicitly touch cache + // when it will eventually become unpinned + onode_map.insert(make_pair(new_oid, o)); + ceph_assert(o->pinned); + + o->oid = new_oid; + o->key = new_okey; + cache->_trim(); +} + +bool BlueStore::OnodeSpace::map_any(std::function<bool(Onode*)> f) +{ + std::lock_guard l(cache->lock); + ldout(cache->cct, 20) << __func__ << dendl; + for (auto& i : onode_map) { + if (f(i.second.get())) { + return true; + } + } + return false; +} + +template <int LogLevelV = 30> +void BlueStore::OnodeSpace::dump(CephContext *cct) +{ + for (auto& i : onode_map) { + ldout(cct, LogLevelV) << i.first << " : " << i.second + << " " << i.second->nref + << " " << i.second->cached + << " " << i.second->pinned + << dendl; + } +} + +// SharedBlob + +#undef dout_prefix +#define dout_prefix *_dout << "bluestore.sharedblob(" << this << ") " +#undef dout_context +#define dout_context coll->store->cct + +void BlueStore::SharedBlob::dump(Formatter* f) const +{ + f->dump_bool("loaded", loaded); + if (loaded) { + persistent->dump(f); + } else { + f->dump_unsigned("sbid_unloaded", sbid_unloaded); + } +} + +ostream& operator<<(ostream& out, const BlueStore::SharedBlob& sb) +{ + out << "SharedBlob(" << &sb; + + if (sb.loaded) { + out << " loaded " << *sb.persistent; + } else { + out << " sbid 0x" << std::hex << sb.sbid_unloaded << std::dec; + } + return out << ")"; +} + +BlueStore::SharedBlob::SharedBlob(uint64_t i, Collection *_coll) + : coll(_coll), sbid_unloaded(i) +{ + ceph_assert(sbid_unloaded > 0); + if (get_cache()) { + get_cache()->add_blob(); + } +} + +BlueStore::SharedBlob::~SharedBlob() +{ + if (loaded && persistent) { + delete persistent; + } +} + +void BlueStore::SharedBlob::put() +{ + if (--nref == 0) { + dout(20) << __func__ << " " << this + << " removing self from set " << get_parent() + << dendl; + again: + auto coll_snap = coll; + if (coll_snap) { + std::lock_guard l(coll_snap->cache->lock); + if (coll_snap != coll) { + goto again; + } + if (!coll_snap->shared_blob_set.remove(this, true)) { + // race with lookup + return; + } + bc._clear(coll_snap->cache); + coll_snap->cache->rm_blob(); + } + delete this; + } +} + +void BlueStore::SharedBlob::get_ref(uint64_t offset, uint32_t length) +{ + ceph_assert(persistent); + persistent->ref_map.get(offset, length); +} + +void BlueStore::SharedBlob::put_ref(uint64_t offset, uint32_t length, + PExtentVector *r, + bool *unshare) +{ + ceph_assert(persistent); + persistent->ref_map.put(offset, length, r, + unshare && !*unshare ? unshare : nullptr); +} + +void BlueStore::SharedBlob::finish_write(uint64_t seq) +{ + while (true) { + BufferCacheShard *cache = coll->cache; + std::lock_guard l(cache->lock); + if (coll->cache != cache) { + dout(20) << __func__ + << " raced with sb cache update, was " << cache + << ", now " << coll->cache << ", retrying" + << dendl; + continue; + } + bc._finish_write(cache, seq); + break; + } +} + +// SharedBlobSet + +#undef dout_prefix +#define dout_prefix *_dout << "bluestore.sharedblobset(" << this << ") " + +template <int LogLevelV = 30> +void BlueStore::SharedBlobSet::dump(CephContext *cct) +{ + std::lock_guard l(lock); + for (auto& i : sb_map) { + ldout(cct, LogLevelV) << i.first << " : " << *i.second << dendl; + } +} + +// Blob + +#undef dout_prefix +#define dout_prefix *_dout << "bluestore.blob(" << this << ") " + +void BlueStore::Blob::dump(Formatter* f) const +{ + if (is_spanning()) { + f->dump_unsigned("spanning_id ", id); + } + blob.dump(f); + if (shared_blob) { + f->dump_object("shared", *shared_blob); + } +} + +ostream& operator<<(ostream& out, const BlueStore::Blob& b) +{ + out << "Blob(" << &b; + if (b.is_spanning()) { + out << " spanning " << b.id; + } + out << " " << b.get_blob() << " " << b.get_blob_use_tracker(); + if (b.shared_blob) { + out << " " << *b.shared_blob; + } else { + out << " (shared_blob=NULL)"; + } + out << ")"; + return out; +} + +void BlueStore::Blob::discard_unallocated(Collection *coll) +{ + if (get_blob().is_shared()) { + return; + } + if (get_blob().is_compressed()) { + bool discard = false; + bool all_invalid = true; + for (auto e : get_blob().get_extents()) { + if (!e.is_valid()) { + discard = true; + } else { + all_invalid = false; + } + } + ceph_assert(discard == all_invalid); // in case of compressed blob all + // or none pextents are invalid. + if (discard) { + shared_blob->bc.discard(shared_blob->get_cache(), 0, + get_blob().get_logical_length()); + } + } else { + size_t pos = 0; + for (auto e : get_blob().get_extents()) { + if (!e.is_valid()) { + dout(20) << __func__ << " 0x" << std::hex << pos + << "~" << e.length + << std::dec << dendl; + shared_blob->bc.discard(shared_blob->get_cache(), pos, e.length); + } + pos += e.length; + } + if (get_blob().can_prune_tail()) { + dirty_blob().prune_tail(); + used_in_blob.prune_tail(get_blob().get_ondisk_length()); + dout(20) << __func__ << " pruned tail, now " << get_blob() << dendl; + } + } +} + +void BlueStore::Blob::get_ref( + Collection *coll, + uint32_t offset, + uint32_t length) +{ + // Caller has to initialize Blob's logical length prior to increment + // references. Otherwise one is neither unable to determine required + // amount of counters in case of per-au tracking nor obtain min_release_size + // for single counter mode. + ceph_assert(get_blob().get_logical_length() != 0); + dout(20) << __func__ << " 0x" << std::hex << offset << "~" << length + << std::dec << " " << *this << dendl; + + if (used_in_blob.is_empty()) { + uint32_t min_release_size = + get_blob().get_release_size(coll->store->min_alloc_size); + uint64_t l = get_blob().get_logical_length(); + dout(20) << __func__ << " init 0x" << std::hex << l << ", " + << min_release_size << std::dec << dendl; + used_in_blob.init(l, min_release_size); + } + used_in_blob.get( + offset, + length); +} + +bool BlueStore::Blob::put_ref( + Collection *coll, + uint32_t offset, + uint32_t length, + PExtentVector *r) +{ + PExtentVector logical; + + dout(20) << __func__ << " 0x" << std::hex << offset << "~" << length + << std::dec << " " << *this << dendl; + + bool empty = used_in_blob.put( + offset, + length, + &logical); + r->clear(); + // nothing to release + if (!empty && logical.empty()) { + return false; + } + + bluestore_blob_t& b = dirty_blob(); + return b.release_extents(empty, logical, r); +} + +bool BlueStore::Blob::can_reuse_blob(uint32_t min_alloc_size, + uint32_t target_blob_size, + uint32_t b_offset, + uint32_t *length0) { + ceph_assert(min_alloc_size); + ceph_assert(target_blob_size); + if (!get_blob().is_mutable()) { + return false; + } + + uint32_t length = *length0; + uint32_t end = b_offset + length; + + // Currently for the sake of simplicity we omit blob reuse if data is + // unaligned with csum chunk. Later we can perform padding if needed. + if (get_blob().has_csum() && + ((b_offset % get_blob().get_csum_chunk_size()) != 0 || + (end % get_blob().get_csum_chunk_size()) != 0)) { + return false; + } + + auto blen = get_blob().get_logical_length(); + uint32_t new_blen = blen; + + // make sure target_blob_size isn't less than current blob len + target_blob_size = std::max(blen, target_blob_size); + + if (b_offset >= blen) { + // new data totally stands out of the existing blob + new_blen = end; + } else { + // new data overlaps with the existing blob + new_blen = std::max(blen, end); + + uint32_t overlap = 0; + if (new_blen > blen) { + overlap = blen - b_offset; + } else { + overlap = length; + } + + if (!get_blob().is_unallocated(b_offset, overlap)) { + // abort if any piece of the overlap has already been allocated + return false; + } + } + + if (new_blen > blen) { + int64_t overflow = int64_t(new_blen) - target_blob_size; + // Unable to decrease the provided length to fit into max_blob_size + if (overflow >= length) { + return false; + } + + // FIXME: in some cases we could reduce unused resolution + if (get_blob().has_unused()) { + return false; + } + + if (overflow > 0) { + new_blen -= overflow; + length -= overflow; + *length0 = length; + } + + if (new_blen > blen) { + dirty_blob().add_tail(new_blen); + used_in_blob.add_tail(new_blen, + get_blob().get_release_size(min_alloc_size)); + } + } + return true; +} + +void BlueStore::Blob::split(Collection *coll, uint32_t blob_offset, Blob *r) +{ + dout(10) << __func__ << " 0x" << std::hex << blob_offset << std::dec + << " start " << *this << dendl; + ceph_assert(blob.can_split()); + ceph_assert(used_in_blob.can_split()); + bluestore_blob_t &lb = dirty_blob(); + bluestore_blob_t &rb = r->dirty_blob(); + + used_in_blob.split( + blob_offset, + &(r->used_in_blob)); + + lb.split(blob_offset, rb); + shared_blob->bc.split(shared_blob->get_cache(), blob_offset, r->shared_blob->bc); + + dout(10) << __func__ << " 0x" << std::hex << blob_offset << std::dec + << " finish " << *this << dendl; + dout(10) << __func__ << " 0x" << std::hex << blob_offset << std::dec + << " and " << *r << dendl; +} + +#ifndef CACHE_BLOB_BL +void BlueStore::Blob::decode( + Collection *coll, + bufferptr::const_iterator& p, + uint64_t struct_v, + uint64_t* sbid, + bool include_ref_map) +{ + denc(blob, p, struct_v); + if (blob.is_shared()) { + denc(*sbid, p); + } + if (include_ref_map) { + if (struct_v > 1) { + used_in_blob.decode(p); + } else { + used_in_blob.clear(); + bluestore_extent_ref_map_t legacy_ref_map; + legacy_ref_map.decode(p); + for (auto r : legacy_ref_map.ref_map) { + get_ref( + coll, + r.first, + r.second.refs * r.second.length); + } + } + } +} +#endif + +// Extent + +void BlueStore::Extent::dump(Formatter* f) const +{ + f->dump_unsigned("logical_offset", logical_offset); + f->dump_unsigned("length", length); + f->dump_unsigned("blob_offset", blob_offset); + f->dump_object("blob", *blob); +} + +ostream& operator<<(ostream& out, const BlueStore::Extent& e) +{ + return out << std::hex << "0x" << e.logical_offset << "~" << e.length + << ": 0x" << e.blob_offset << "~" << e.length << std::dec + << " " << *e.blob; +} + +// OldExtent +BlueStore::OldExtent* BlueStore::OldExtent::create(CollectionRef c, + uint32_t lo, + uint32_t o, + uint32_t l, + BlobRef& b) { + OldExtent* oe = new OldExtent(lo, o, l, b); + b->put_ref(c.get(), o, l, &(oe->r)); + oe->blob_empty = !b->is_referenced(); + return oe; +} + +// ExtentMap + +#undef dout_prefix +#define dout_prefix *_dout << "bluestore.extentmap(" << this << ") " +#undef dout_context +#define dout_context onode->c->store->cct + +BlueStore::ExtentMap::ExtentMap(Onode *o) + : onode(o), + inline_bl( + o->c->store->cct->_conf->bluestore_extent_map_inline_shard_prealloc_size) { +} + +void BlueStore::ExtentMap::dump(Formatter* f) const +{ + f->open_array_section("extents"); + + for (auto& e : extent_map) { + f->dump_object("extent", e); + } + f->close_section(); +} + +void BlueStore::ExtentMap::dup(BlueStore* b, TransContext* txc, + CollectionRef& c, OnodeRef& oldo, OnodeRef& newo, uint64_t& srcoff, + uint64_t& length, uint64_t& dstoff) { + + auto cct = onode->c->store->cct; + bool inject_21040 = + cct->_conf->bluestore_debug_inject_bug21040; + vector<BlobRef> id_to_blob(oldo->extent_map.extent_map.size()); + for (auto& e : oldo->extent_map.extent_map) { + e.blob->last_encoded_id = -1; + } + + int n = 0; + uint64_t end = srcoff + length; + uint32_t dirty_range_begin = 0; + uint32_t dirty_range_end = 0; + bool src_dirty = false; + for (auto ep = oldo->extent_map.seek_lextent(srcoff); + ep != oldo->extent_map.extent_map.end(); + ++ep) { + auto& e = *ep; + if (e.logical_offset >= end) { + break; + } + dout(20) << __func__ << " src " << e << dendl; + BlobRef cb; + bool blob_duped = true; + if (e.blob->last_encoded_id >= 0) { + cb = id_to_blob[e.blob->last_encoded_id]; + blob_duped = false; + } else { + // dup the blob + const bluestore_blob_t& blob = e.blob->get_blob(); + // make sure it is shared + if (!blob.is_shared()) { + c->make_blob_shared(b->_assign_blobid(txc), e.blob); + if (!inject_21040 && !src_dirty) { + src_dirty = true; + dirty_range_begin = e.logical_offset; + } else if (inject_21040 && + dirty_range_begin == 0 && dirty_range_end == 0) { + dirty_range_begin = e.logical_offset; + } + ceph_assert(e.logical_end() > 0); + // -1 to exclude next potential shard + dirty_range_end = e.logical_end() - 1; + } else { + c->load_shared_blob(e.blob->shared_blob); + } + cb = new Blob(); + e.blob->last_encoded_id = n; + id_to_blob[n] = cb; + e.blob->dup(*cb); + // bump the extent refs on the copied blob's extents + for (auto p : blob.get_extents()) { + if (p.is_valid()) { + e.blob->shared_blob->get_ref(p.offset, p.length); + } + } + txc->write_shared_blob(e.blob->shared_blob); + dout(20) << __func__ << " new " << *cb << dendl; + } + + int skip_front, skip_back; + if (e.logical_offset < srcoff) { + skip_front = srcoff - e.logical_offset; + } else { + skip_front = 0; + } + if (e.logical_end() > end) { + skip_back = e.logical_end() - end; + } else { + skip_back = 0; + } + + Extent* ne = new Extent(e.logical_offset + skip_front + dstoff - srcoff, + e.blob_offset + skip_front, e.length - skip_front - skip_back, cb); + newo->extent_map.extent_map.insert(*ne); + ne->blob->get_ref(c.get(), ne->blob_offset, ne->length); + // fixme: we may leave parts of new blob unreferenced that could + // be freed (relative to the shared_blob). + txc->statfs_delta.stored() += ne->length; + if (e.blob->get_blob().is_compressed()) { + txc->statfs_delta.compressed_original() += ne->length; + if (blob_duped) { + txc->statfs_delta.compressed() += + cb->get_blob().get_compressed_payload_length(); + } + } + dout(20) << __func__ << " dst " << *ne << dendl; + ++n; + } + if ((!inject_21040 && src_dirty) || + (inject_21040 && dirty_range_end > dirty_range_begin)) { + oldo->extent_map.dirty_range(dirty_range_begin, + dirty_range_end - dirty_range_begin); + txc->write_onode(oldo); + } + txc->write_onode(newo); + + if (dstoff + length > newo->onode.size) { + newo->onode.size = dstoff + length; + } + newo->extent_map.dirty_range(dstoff, length); +} +void BlueStore::ExtentMap::update(KeyValueDB::Transaction t, + bool force) +{ + auto cct = onode->c->store->cct; //used by dout + dout(20) << __func__ << " " << onode->oid << (force ? " force" : "") << dendl; + if (onode->onode.extent_map_shards.empty()) { + if (inline_bl.length() == 0) { + unsigned n; + // we need to encode inline_bl to measure encoded length + bool never_happen = encode_some(0, OBJECT_MAX_SIZE, inline_bl, &n); + inline_bl.reassign_to_mempool(mempool::mempool_bluestore_inline_bl); + ceph_assert(!never_happen); + size_t len = inline_bl.length(); + dout(20) << __func__ << " inline shard " << len << " bytes from " << n + << " extents" << dendl; + if (!force && len > cct->_conf->bluestore_extent_map_shard_max_size) { + request_reshard(0, OBJECT_MAX_SIZE); + return; + } + } + // will persist in the onode key. + } else { + // pending shard update + struct dirty_shard_t { + Shard *shard; + bufferlist bl; + dirty_shard_t(Shard *s) : shard(s) {} + }; + vector<dirty_shard_t> encoded_shards; + // allocate slots for all shards in a single call instead of + // doing multiple allocations - one per each dirty shard + encoded_shards.reserve(shards.size()); + + auto p = shards.begin(); + auto prev_p = p; + while (p != shards.end()) { + ceph_assert(p->shard_info->offset >= prev_p->shard_info->offset); + auto n = p; + ++n; + if (p->dirty) { + uint32_t endoff; + if (n == shards.end()) { + endoff = OBJECT_MAX_SIZE; + } else { + endoff = n->shard_info->offset; + } + encoded_shards.emplace_back(dirty_shard_t(&(*p))); + bufferlist& bl = encoded_shards.back().bl; + if (encode_some(p->shard_info->offset, endoff - p->shard_info->offset, + bl, &p->extents)) { + if (force) { + derr << __func__ << " encode_some needs reshard" << dendl; + ceph_assert(!force); + } + } + size_t len = bl.length(); + + dout(20) << __func__ << " shard 0x" << std::hex + << p->shard_info->offset << std::dec << " is " << len + << " bytes (was " << p->shard_info->bytes << ") from " + << p->extents << " extents" << dendl; + + if (!force) { + if (len > cct->_conf->bluestore_extent_map_shard_max_size) { + // we are big; reshard ourselves + request_reshard(p->shard_info->offset, endoff); + } + // avoid resharding the trailing shard, even if it is small + else if (n != shards.end() && + len < g_conf()->bluestore_extent_map_shard_min_size) { + ceph_assert(endoff != OBJECT_MAX_SIZE); + if (p == shards.begin()) { + // we are the first shard, combine with next shard + request_reshard(p->shard_info->offset, endoff + 1); + } else { + // combine either with the previous shard or the next, + // whichever is smaller + if (prev_p->shard_info->bytes > n->shard_info->bytes) { + request_reshard(p->shard_info->offset, endoff + 1); + } else { + request_reshard(prev_p->shard_info->offset, endoff); + } + } + } + } + } + prev_p = p; + p = n; + } + if (needs_reshard()) { + return; + } + + // schedule DB update for dirty shards + string key; + for (auto& it : encoded_shards) { + it.shard->dirty = false; + it.shard->shard_info->bytes = it.bl.length(); + generate_extent_shard_key_and_apply( + onode->key, + it.shard->shard_info->offset, + &key, + [&](const string& final_key) { + t->set(PREFIX_OBJ, final_key, it.bl); + } + ); + } + } +} + +bid_t BlueStore::ExtentMap::allocate_spanning_blob_id() +{ + if (spanning_blob_map.empty()) + return 0; + bid_t bid = spanning_blob_map.rbegin()->first + 1; + // bid is valid and available. + if (bid >= 0) + return bid; + // Find next unused bid; + bid = rand() % (numeric_limits<bid_t>::max() + 1); + const auto begin_bid = bid; + do { + if (!spanning_blob_map.count(bid)) + return bid; + else { + bid++; + if (bid < 0) bid = 0; + } + } while (bid != begin_bid); + auto cct = onode->c->store->cct; // used by dout + _dump_onode<0>(cct, *onode); + ceph_abort_msg("no available blob id"); +} + +void BlueStore::ExtentMap::reshard( + KeyValueDB *db, + KeyValueDB::Transaction t) +{ + auto cct = onode->c->store->cct; // used by dout + + dout(10) << __func__ << " 0x[" << std::hex << needs_reshard_begin << "," + << needs_reshard_end << ")" << std::dec + << " of " << onode->onode.extent_map_shards.size() + << " shards on " << onode->oid << dendl; + for (auto& p : spanning_blob_map) { + dout(20) << __func__ << " spanning blob " << p.first << " " << *p.second + << dendl; + } + // determine shard index range + unsigned si_begin = 0, si_end = 0; + if (!shards.empty()) { + while (si_begin + 1 < shards.size() && + shards[si_begin + 1].shard_info->offset <= needs_reshard_begin) { + ++si_begin; + } + needs_reshard_begin = shards[si_begin].shard_info->offset; + for (si_end = si_begin; si_end < shards.size(); ++si_end) { + if (shards[si_end].shard_info->offset >= needs_reshard_end) { + needs_reshard_end = shards[si_end].shard_info->offset; + break; + } + } + if (si_end == shards.size()) { + needs_reshard_end = OBJECT_MAX_SIZE; + } + dout(20) << __func__ << " shards [" << si_begin << "," << si_end << ")" + << " over 0x[" << std::hex << needs_reshard_begin << "," + << needs_reshard_end << ")" << std::dec << dendl; + } + + fault_range(db, needs_reshard_begin, (needs_reshard_end - needs_reshard_begin)); + + // we may need to fault in a larger interval later must have all + // referring extents for spanning blobs loaded in order to have + // accurate use_tracker values. + uint32_t spanning_scan_begin = needs_reshard_begin; + uint32_t spanning_scan_end = needs_reshard_end; + + // remove old keys + string key; + for (unsigned i = si_begin; i < si_end; ++i) { + generate_extent_shard_key_and_apply( + onode->key, shards[i].shard_info->offset, &key, + [&](const string& final_key) { + t->rmkey(PREFIX_OBJ, final_key); + } + ); + } + + // calculate average extent size + unsigned bytes = 0; + unsigned extents = 0; + if (onode->onode.extent_map_shards.empty()) { + bytes = inline_bl.length(); + extents = extent_map.size(); + } else { + for (unsigned i = si_begin; i < si_end; ++i) { + bytes += shards[i].shard_info->bytes; + extents += shards[i].extents; + } + } + unsigned target = cct->_conf->bluestore_extent_map_shard_target_size; + unsigned slop = target * + cct->_conf->bluestore_extent_map_shard_target_size_slop; + unsigned extent_avg = bytes / std::max(1u, extents); + dout(20) << __func__ << " extent_avg " << extent_avg << ", target " << target + << ", slop " << slop << dendl; + + // reshard + unsigned estimate = 0; + unsigned offset = needs_reshard_begin; + vector<bluestore_onode_t::shard_info> new_shard_info; + unsigned max_blob_end = 0; + Extent dummy(needs_reshard_begin); + for (auto e = extent_map.lower_bound(dummy); + e != extent_map.end(); + ++e) { + if (e->logical_offset >= needs_reshard_end) { + break; + } + dout(30) << " extent " << *e << dendl; + + // disfavor shard boundaries that span a blob + bool would_span = (e->logical_offset < max_blob_end) || e->blob_offset; + if (estimate && + estimate + extent_avg > target + (would_span ? slop : 0)) { + // new shard + if (offset == needs_reshard_begin) { + new_shard_info.emplace_back(bluestore_onode_t::shard_info()); + new_shard_info.back().offset = offset; + dout(20) << __func__ << " new shard 0x" << std::hex << offset + << std::dec << dendl; + } + offset = e->logical_offset; + new_shard_info.emplace_back(bluestore_onode_t::shard_info()); + new_shard_info.back().offset = offset; + dout(20) << __func__ << " new shard 0x" << std::hex << offset + << std::dec << dendl; + estimate = 0; + } + estimate += extent_avg; + unsigned bs = e->blob_start(); + if (bs < spanning_scan_begin) { + spanning_scan_begin = bs; + } + uint32_t be = e->blob_end(); + if (be > max_blob_end) { + max_blob_end = be; + } + if (be > spanning_scan_end) { + spanning_scan_end = be; + } + } + if (new_shard_info.empty() && (si_begin > 0 || + si_end < shards.size())) { + // we resharded a partial range; we must produce at least one output + // shard + new_shard_info.emplace_back(bluestore_onode_t::shard_info()); + new_shard_info.back().offset = needs_reshard_begin; + dout(20) << __func__ << " new shard 0x" << std::hex << needs_reshard_begin + << std::dec << " (singleton degenerate case)" << dendl; + } + + auto& sv = onode->onode.extent_map_shards; + dout(20) << __func__ << " new " << new_shard_info << dendl; + dout(20) << __func__ << " old " << sv << dendl; + if (sv.empty()) { + // no old shards to keep + sv.swap(new_shard_info); + init_shards(true, true); + } else { + // splice in new shards + sv.erase(sv.begin() + si_begin, sv.begin() + si_end); + shards.erase(shards.begin() + si_begin, shards.begin() + si_end); + sv.insert( + sv.begin() + si_begin, + new_shard_info.begin(), + new_shard_info.end()); + shards.insert(shards.begin() + si_begin, new_shard_info.size(), Shard()); + si_end = si_begin + new_shard_info.size(); + + ceph_assert(sv.size() == shards.size()); + + // note that we need to update every shard_info of shards here, + // as sv might have been totally re-allocated above + for (unsigned i = 0; i < shards.size(); i++) { + shards[i].shard_info = &sv[i]; + } + + // mark newly added shards as dirty + for (unsigned i = si_begin; i < si_end; ++i) { + shards[i].loaded = true; + shards[i].dirty = true; + } + } + dout(20) << __func__ << " fin " << sv << dendl; + inline_bl.clear(); + + if (sv.empty()) { + // no more shards; unspan all previously spanning blobs + auto p = spanning_blob_map.begin(); + while (p != spanning_blob_map.end()) { + p->second->id = -1; + dout(30) << __func__ << " un-spanning " << *p->second << dendl; + p = spanning_blob_map.erase(p); + } + } else { + // identify new spanning blobs + dout(20) << __func__ << " checking spanning blobs 0x[" << std::hex + << spanning_scan_begin << "," << spanning_scan_end << ")" << dendl; + if (spanning_scan_begin < needs_reshard_begin) { + fault_range(db, spanning_scan_begin, + needs_reshard_begin - spanning_scan_begin); + } + if (spanning_scan_end > needs_reshard_end) { + fault_range(db, needs_reshard_end, + spanning_scan_end - needs_reshard_end); + } + auto sp = sv.begin() + si_begin; + auto esp = sv.end(); + unsigned shard_start = sp->offset; + unsigned shard_end; + ++sp; + if (sp == esp) { + shard_end = OBJECT_MAX_SIZE; + } else { + shard_end = sp->offset; + } + Extent dummy(needs_reshard_begin); + + bool was_too_many_blobs_check = false; + auto too_many_blobs_threshold = + g_conf()->bluestore_debug_too_many_blobs_threshold; + auto& dumped_onodes = onode->c->onode_map.cache->dumped_onodes; + decltype(onode->c->onode_map.cache->dumped_onodes)::value_type* oid_slot = nullptr; + decltype(onode->c->onode_map.cache->dumped_onodes)::value_type* oldest_slot = nullptr; + + for (auto e = extent_map.lower_bound(dummy); e != extent_map.end(); ++e) { + if (e->logical_offset >= needs_reshard_end) { + break; + } + dout(30) << " extent " << *e << dendl; + while (e->logical_offset >= shard_end) { + shard_start = shard_end; + ceph_assert(sp != esp); + ++sp; + if (sp == esp) { + shard_end = OBJECT_MAX_SIZE; + } else { + shard_end = sp->offset; + } + dout(30) << __func__ << " shard 0x" << std::hex << shard_start + << " to 0x" << shard_end << std::dec << dendl; + } + + if (e->blob_escapes_range(shard_start, shard_end - shard_start)) { + if (!e->blob->is_spanning()) { + // We have two options: (1) split the blob into pieces at the + // shard boundaries (and adjust extents accordingly), or (2) + // mark it spanning. We prefer to cut the blob if we can. Note that + // we may have to split it multiple times--potentially at every + // shard boundary. + bool must_span = false; + BlobRef b = e->blob; + if (b->can_split()) { + uint32_t bstart = e->blob_start(); + uint32_t bend = e->blob_end(); + for (const auto& sh : shards) { + if (bstart < sh.shard_info->offset && + bend > sh.shard_info->offset) { + uint32_t blob_offset = sh.shard_info->offset - bstart; + if (b->can_split_at(blob_offset)) { + dout(20) << __func__ << " splitting blob, bstart 0x" + << std::hex << bstart << " blob_offset 0x" + << blob_offset << std::dec << " " << *b << dendl; + b = split_blob(b, blob_offset, sh.shard_info->offset); + // switch b to the new right-hand side, in case it + // *also* has to get split. + bstart += blob_offset; + onode->c->store->logger->inc(l_bluestore_blob_split); + } else { + must_span = true; + break; + } + } + } + } else { + must_span = true; + } + if (must_span) { + auto bid = allocate_spanning_blob_id(); + b->id = bid; + spanning_blob_map[b->id] = b; + dout(20) << __func__ << " adding spanning " << *b << dendl; + if (!was_too_many_blobs_check && + too_many_blobs_threshold && + spanning_blob_map.size() >= size_t(too_many_blobs_threshold)) { + + was_too_many_blobs_check = true; + for (size_t i = 0; i < dumped_onodes.size(); ++i) { + if (dumped_onodes[i].first == onode->oid) { + oid_slot = &dumped_onodes[i]; + break; + } + if (!oldest_slot || (oldest_slot && + dumped_onodes[i].second < oldest_slot->second)) { + oldest_slot = &dumped_onodes[i]; + } + } + } + } + } + } else { + if (e->blob->is_spanning()) { + spanning_blob_map.erase(e->blob->id); + e->blob->id = -1; + dout(30) << __func__ << " un-spanning " << *e->blob << dendl; + } + } + } + bool do_dump = (!oid_slot && was_too_many_blobs_check) || + (oid_slot && + (mono_clock::now() - oid_slot->second >= make_timespan(5 * 60))); + if (do_dump) { + dout(0) << __func__ + << " spanning blob count exceeds threshold, " + << spanning_blob_map.size() << " spanning blobs" + << dendl; + _dump_onode<0>(cct, *onode); + if (oid_slot) { + oid_slot->second = mono_clock::now(); + } else { + ceph_assert(oldest_slot); + oldest_slot->first = onode->oid; + oldest_slot->second = mono_clock::now(); + } + } + } + + clear_needs_reshard(); +} + +bool BlueStore::ExtentMap::encode_some( + uint32_t offset, + uint32_t length, + bufferlist& bl, + unsigned *pn) +{ + Extent dummy(offset); + auto start = extent_map.lower_bound(dummy); + uint32_t end = offset + length; + + __u8 struct_v = 2; // Version 2 differs from v1 in blob's ref_map + // serialization only. Hence there is no specific + // handling at ExtentMap level. + + unsigned n = 0; + size_t bound = 0; + bool must_reshard = false; + for (auto p = start; + p != extent_map.end() && p->logical_offset < end; + ++p, ++n) { + ceph_assert(p->logical_offset >= offset); + p->blob->last_encoded_id = -1; + if (!p->blob->is_spanning() && p->blob_escapes_range(offset, length)) { + dout(30) << __func__ << " 0x" << std::hex << offset << "~" << length + << std::dec << " hit new spanning blob " << *p << dendl; + request_reshard(p->blob_start(), p->blob_end()); + must_reshard = true; + } + if (!must_reshard) { + denc_varint(0, bound); // blobid + denc_varint(0, bound); // logical_offset + denc_varint(0, bound); // len + denc_varint(0, bound); // blob_offset + + p->blob->bound_encode( + bound, + struct_v, + p->blob->shared_blob->get_sbid(), + false); + } + } + if (must_reshard) { + return true; + } + + denc(struct_v, bound); + denc_varint(0, bound); // number of extents + + { + auto app = bl.get_contiguous_appender(bound); + denc(struct_v, app); + denc_varint(n, app); + if (pn) { + *pn = n; + } + + n = 0; + uint64_t pos = 0; + uint64_t prev_len = 0; + for (auto p = start; + p != extent_map.end() && p->logical_offset < end; + ++p, ++n) { + unsigned blobid; + bool include_blob = false; + if (p->blob->is_spanning()) { + blobid = p->blob->id << BLOBID_SHIFT_BITS; + blobid |= BLOBID_FLAG_SPANNING; + } else if (p->blob->last_encoded_id < 0) { + p->blob->last_encoded_id = n + 1; // so it is always non-zero + include_blob = true; + blobid = 0; // the decoder will infer the id from n + } else { + blobid = p->blob->last_encoded_id << BLOBID_SHIFT_BITS; + } + if (p->logical_offset == pos) { + blobid |= BLOBID_FLAG_CONTIGUOUS; + } + if (p->blob_offset == 0) { + blobid |= BLOBID_FLAG_ZEROOFFSET; + } + if (p->length == prev_len) { + blobid |= BLOBID_FLAG_SAMELENGTH; + } else { + prev_len = p->length; + } + denc_varint(blobid, app); + if ((blobid & BLOBID_FLAG_CONTIGUOUS) == 0) { + denc_varint_lowz(p->logical_offset - pos, app); + } + if ((blobid & BLOBID_FLAG_ZEROOFFSET) == 0) { + denc_varint_lowz(p->blob_offset, app); + } + if ((blobid & BLOBID_FLAG_SAMELENGTH) == 0) { + denc_varint_lowz(p->length, app); + } + pos = p->logical_end(); + if (include_blob) { + p->blob->encode(app, struct_v, p->blob->shared_blob->get_sbid(), false); + } + } + } + /*derr << __func__ << bl << dendl; + derr << __func__ << ":"; + bl.hexdump(*_dout); + *_dout << dendl; + */ + return false; +} + +unsigned BlueStore::ExtentMap::decode_some(bufferlist& bl) +{ + /* + derr << __func__ << ":"; + bl.hexdump(*_dout); + *_dout << dendl; + */ + + ceph_assert(bl.get_num_buffers() <= 1); + auto p = bl.front().begin_deep(); + __u8 struct_v; + denc(struct_v, p); + // Version 2 differs from v1 in blob's ref_map + // serialization only. Hence there is no specific + // handling at ExtentMap level below. + ceph_assert(struct_v == 1 || struct_v == 2); + + uint32_t num; + denc_varint(num, p); + vector<BlobRef> blobs(num); + uint64_t pos = 0; + uint64_t prev_len = 0; + unsigned n = 0; + + while (!p.end()) { + Extent *le = new Extent(); + uint64_t blobid; + denc_varint(blobid, p); + if ((blobid & BLOBID_FLAG_CONTIGUOUS) == 0) { + uint64_t gap; + denc_varint_lowz(gap, p); + pos += gap; + } + le->logical_offset = pos; + if ((blobid & BLOBID_FLAG_ZEROOFFSET) == 0) { + denc_varint_lowz(le->blob_offset, p); + } else { + le->blob_offset = 0; + } + if ((blobid & BLOBID_FLAG_SAMELENGTH) == 0) { + denc_varint_lowz(prev_len, p); + } + le->length = prev_len; + + if (blobid & BLOBID_FLAG_SPANNING) { + dout(30) << __func__ << " getting spanning blob " + << (blobid >> BLOBID_SHIFT_BITS) << dendl; + le->assign_blob(get_spanning_blob(blobid >> BLOBID_SHIFT_BITS)); + } else { + blobid >>= BLOBID_SHIFT_BITS; + if (blobid) { + le->assign_blob(blobs[blobid - 1]); + ceph_assert(le->blob); + } else { + Blob *b = new Blob(); + uint64_t sbid = 0; + b->decode(onode->c, p, struct_v, &sbid, false); + blobs[n] = b; + onode->c->open_shared_blob(sbid, b); + le->assign_blob(b); + } + // we build ref_map dynamically for non-spanning blobs + le->blob->get_ref( + onode->c, + le->blob_offset, + le->length); + } + pos += prev_len; + ++n; + extent_map.insert(*le); + } + + ceph_assert(n == num); + return num; +} + +void BlueStore::ExtentMap::bound_encode_spanning_blobs(size_t& p) +{ + // Version 2 differs from v1 in blob's ref_map + // serialization only. Hence there is no specific + // handling at ExtentMap level. + __u8 struct_v = 2; + + denc(struct_v, p); + denc_varint((uint32_t)0, p); + size_t key_size = 0; + denc_varint((uint32_t)0, key_size); + p += spanning_blob_map.size() * key_size; + for (const auto& i : spanning_blob_map) { + i.second->bound_encode(p, struct_v, i.second->shared_blob->get_sbid(), true); + } +} + +void BlueStore::ExtentMap::encode_spanning_blobs( + bufferlist::contiguous_appender& p) +{ + // Version 2 differs from v1 in blob's ref_map + // serialization only. Hence there is no specific + // handling at ExtentMap level. + __u8 struct_v = 2; + + denc(struct_v, p); + denc_varint(spanning_blob_map.size(), p); + for (auto& i : spanning_blob_map) { + denc_varint(i.second->id, p); + i.second->encode(p, struct_v, i.second->shared_blob->get_sbid(), true); + } +} + +void BlueStore::ExtentMap::decode_spanning_blobs( + bufferptr::const_iterator& p) +{ + __u8 struct_v; + denc(struct_v, p); + // Version 2 differs from v1 in blob's ref_map + // serialization only. Hence there is no specific + // handling at ExtentMap level. + ceph_assert(struct_v == 1 || struct_v == 2); + + unsigned n; + denc_varint(n, p); + while (n--) { + BlobRef b(new Blob()); + denc_varint(b->id, p); + spanning_blob_map[b->id] = b; + uint64_t sbid = 0; + b->decode(onode->c, p, struct_v, &sbid, true); + onode->c->open_shared_blob(sbid, b); + } +} + +void BlueStore::ExtentMap::init_shards(bool loaded, bool dirty) +{ + shards.resize(onode->onode.extent_map_shards.size()); + unsigned i = 0; + for (auto &s : onode->onode.extent_map_shards) { + shards[i].shard_info = &s; + shards[i].loaded = loaded; + shards[i].dirty = dirty; + ++i; + } +} + +void BlueStore::ExtentMap::fault_range( + KeyValueDB *db, + uint32_t offset, + uint32_t length) +{ + dout(30) << __func__ << " 0x" << std::hex << offset << "~" << length + << std::dec << dendl; + auto start = seek_shard(offset); + auto last = seek_shard(offset + length); + + if (start < 0) + return; + + ceph_assert(last >= start); + string key; + while (start <= last) { + ceph_assert((size_t)start < shards.size()); + auto p = &shards[start]; + if (!p->loaded) { + dout(30) << __func__ << " opening shard 0x" << std::hex + << p->shard_info->offset << std::dec << dendl; + bufferlist v; + generate_extent_shard_key_and_apply( + onode->key, p->shard_info->offset, &key, + [&](const string& final_key) { + int r = db->get(PREFIX_OBJ, final_key, &v); + if (r < 0) { + derr << __func__ << " missing shard 0x" << std::hex + << p->shard_info->offset << std::dec << " for " << onode->oid + << dendl; + ceph_assert(r >= 0); + } + } + ); + p->extents = decode_some(v); + p->loaded = true; + dout(20) << __func__ << " open shard 0x" << std::hex + << p->shard_info->offset + << " for range 0x" << offset << "~" << length << std::dec + << " (" << v.length() << " bytes)" << dendl; + ceph_assert(p->dirty == false); + ceph_assert(v.length() == p->shard_info->bytes); + onode->c->store->logger->inc(l_bluestore_onode_shard_misses); + } else { + onode->c->store->logger->inc(l_bluestore_onode_shard_hits); + } + ++start; + } +} + +void BlueStore::ExtentMap::dirty_range( + uint32_t offset, + uint32_t length) +{ + dout(30) << __func__ << " 0x" << std::hex << offset << "~" << length + << std::dec << dendl; + if (shards.empty()) { + dout(20) << __func__ << " mark inline shard dirty" << dendl; + inline_bl.clear(); + return; + } + auto start = seek_shard(offset); + if (length == 0) { + length = 1; + } + auto last = seek_shard(offset + length - 1); + if (start < 0) + return; + + ceph_assert(last >= start); + while (start <= last) { + ceph_assert((size_t)start < shards.size()); + auto p = &shards[start]; + if (!p->loaded) { + derr << __func__ << "on write 0x" << std::hex << offset + << "~" << length << " shard 0x" << p->shard_info->offset + << std::dec << " is not loaded, can't mark dirty" << dendl; + ceph_abort_msg("can't mark unloaded shard dirty"); + } + if (!p->dirty) { + dout(20) << __func__ << " mark shard 0x" << std::hex + << p->shard_info->offset << std::dec << " dirty" << dendl; + p->dirty = true; + } + ++start; + } +} + +BlueStore::extent_map_t::iterator BlueStore::ExtentMap::find( + uint64_t offset) +{ + Extent dummy(offset); + return extent_map.find(dummy); +} + +BlueStore::extent_map_t::iterator BlueStore::ExtentMap::seek_lextent( + uint64_t offset) +{ + Extent dummy(offset); + auto fp = extent_map.lower_bound(dummy); + if (fp != extent_map.begin()) { + --fp; + if (fp->logical_end() <= offset) { + ++fp; + } + } + return fp; +} + +BlueStore::extent_map_t::const_iterator BlueStore::ExtentMap::seek_lextent( + uint64_t offset) const +{ + Extent dummy(offset); + auto fp = extent_map.lower_bound(dummy); + if (fp != extent_map.begin()) { + --fp; + if (fp->logical_end() <= offset) { + ++fp; + } + } + return fp; +} + +bool BlueStore::ExtentMap::has_any_lextents(uint64_t offset, uint64_t length) +{ + auto fp = seek_lextent(offset); + if (fp == extent_map.end() || fp->logical_offset >= offset + length) { + return false; + } + return true; +} + +int BlueStore::ExtentMap::compress_extent_map( + uint64_t offset, + uint64_t length) +{ + if (extent_map.empty()) + return 0; + int removed = 0; + auto p = seek_lextent(offset); + if (p != extent_map.begin()) { + --p; // start to the left of offset + } + // the caller should have just written to this region + ceph_assert(p != extent_map.end()); + + // identify the *next* shard + auto pshard = shards.begin(); + while (pshard != shards.end() && + p->logical_offset >= pshard->shard_info->offset) { + ++pshard; + } + uint64_t shard_end; + if (pshard != shards.end()) { + shard_end = pshard->shard_info->offset; + } else { + shard_end = OBJECT_MAX_SIZE; + } + + auto n = p; + for (++n; n != extent_map.end(); p = n++) { + if (n->logical_offset > offset + length) { + break; // stop after end + } + while (n != extent_map.end() && + p->logical_end() == n->logical_offset && + p->blob == n->blob && + p->blob_offset + p->length == n->blob_offset && + n->logical_offset < shard_end) { + dout(20) << __func__ << " 0x" << std::hex << offset << "~" << length + << " next shard 0x" << shard_end << std::dec + << " merging " << *p << " and " << *n << dendl; + p->length += n->length; + rm(n++); + ++removed; + } + if (n == extent_map.end()) { + break; + } + if (n->logical_offset >= shard_end) { + ceph_assert(pshard != shards.end()); + ++pshard; + if (pshard != shards.end()) { + shard_end = pshard->shard_info->offset; + } else { + shard_end = OBJECT_MAX_SIZE; + } + } + } + if (removed) { + onode->c->store->logger->inc(l_bluestore_extent_compress, removed); + } + return removed; +} + +void BlueStore::ExtentMap::punch_hole( + CollectionRef &c, + uint64_t offset, + uint64_t length, + old_extent_map_t *old_extents) +{ + auto p = seek_lextent(offset); + uint64_t end = offset + length; + while (p != extent_map.end()) { + if (p->logical_offset >= end) { + break; + } + if (p->logical_offset < offset) { + if (p->logical_end() > end) { + // split and deref middle + uint64_t front = offset - p->logical_offset; + OldExtent* oe = OldExtent::create(c, offset, p->blob_offset + front, + length, p->blob); + old_extents->push_back(*oe); + add(end, + p->blob_offset + front + length, + p->length - front - length, + p->blob); + p->length = front; + break; + } else { + // deref tail + ceph_assert(p->logical_end() > offset); // else seek_lextent bug + uint64_t keep = offset - p->logical_offset; + OldExtent* oe = OldExtent::create(c, offset, p->blob_offset + keep, + p->length - keep, p->blob); + old_extents->push_back(*oe); + p->length = keep; + ++p; + continue; + } + } + if (p->logical_offset + p->length <= end) { + // deref whole lextent + OldExtent* oe = OldExtent::create(c, p->logical_offset, p->blob_offset, + p->length, p->blob); + old_extents->push_back(*oe); + rm(p++); + continue; + } + // deref head + uint64_t keep = p->logical_end() - end; + OldExtent* oe = OldExtent::create(c, p->logical_offset, p->blob_offset, + p->length - keep, p->blob); + old_extents->push_back(*oe); + + add(end, p->blob_offset + p->length - keep, keep, p->blob); + rm(p); + break; + } +} + +BlueStore::Extent *BlueStore::ExtentMap::set_lextent( + CollectionRef &c, + uint64_t logical_offset, + uint64_t blob_offset, uint64_t length, BlobRef b, + old_extent_map_t *old_extents) +{ + // We need to have completely initialized Blob to increment its ref counters. + ceph_assert(b->get_blob().get_logical_length() != 0); + + // Do get_ref prior to punch_hole to prevent from putting reused blob into + // old_extents list if we overwre the blob totally + // This might happen during WAL overwrite. + b->get_ref(onode->c, blob_offset, length); + + if (old_extents) { + punch_hole(c, logical_offset, length, old_extents); + } + + Extent *le = new Extent(logical_offset, blob_offset, length, b); + extent_map.insert(*le); + if (spans_shard(logical_offset, length)) { + request_reshard(logical_offset, logical_offset + length); + } + return le; +} + +BlueStore::BlobRef BlueStore::ExtentMap::split_blob( + BlobRef lb, + uint32_t blob_offset, + uint32_t pos) +{ + uint32_t end_pos = pos + lb->get_blob().get_logical_length() - blob_offset; + dout(20) << __func__ << " 0x" << std::hex << pos << " end 0x" << end_pos + << " blob_offset 0x" << blob_offset << std::dec << " " << *lb + << dendl; + BlobRef rb = onode->c->new_blob(); + lb->split(onode->c, blob_offset, rb.get()); + + for (auto ep = seek_lextent(pos); + ep != extent_map.end() && ep->logical_offset < end_pos; + ++ep) { + if (ep->blob != lb) { + continue; + } + if (ep->logical_offset < pos) { + // split extent + size_t left = pos - ep->logical_offset; + Extent *ne = new Extent(pos, 0, ep->length - left, rb); + extent_map.insert(*ne); + ep->length = left; + dout(30) << __func__ << " split " << *ep << dendl; + dout(30) << __func__ << " to " << *ne << dendl; + } else { + // switch blob + ceph_assert(ep->blob_offset >= blob_offset); + + ep->blob = rb; + ep->blob_offset -= blob_offset; + dout(30) << __func__ << " adjusted " << *ep << dendl; + } + } + return rb; +} + +// Onode + +#undef dout_prefix +#define dout_prefix *_dout << "bluestore.onode(" << this << ")." << __func__ << " " + +void BlueStore::Onode::get() { + if (++nref >= 2 && !pinned) { + OnodeCacheShard* ocs = c->get_onode_cache(); + ocs->lock.lock(); + // It is possible that during waiting split_cache moved us to different OnodeCacheShard. + while (ocs != c->get_onode_cache()) { + ocs->lock.unlock(); + ocs = c->get_onode_cache(); + ocs->lock.lock(); + } + bool was_pinned = pinned; + pinned = nref >= 2; + bool r = !was_pinned && pinned; + if (cached && r) { + ocs->_pin(this); + } + ocs->lock.unlock(); + } +} +void BlueStore::Onode::put() { + ++put_nref; + int n = --nref; + if (n == 1) { + OnodeCacheShard* ocs = c->get_onode_cache(); + ocs->lock.lock(); + // It is possible that during waiting split_cache moved us to different OnodeCacheShard. + while (ocs != c->get_onode_cache()) { + ocs->lock.unlock(); + ocs = c->get_onode_cache(); + ocs->lock.lock(); + } + bool need_unpin = pinned; + pinned = pinned && nref >= 2; + need_unpin = need_unpin && !pinned; + if (cached && need_unpin) { + if (exists) { + ocs->_unpin(this); + } else { + ocs->_unpin_and_rm(this); + // remove will also decrement nref + c->onode_map._remove(oid); + } + } + ocs->lock.unlock(); + } + auto pn = --put_nref; + if (nref == 0 && pn == 0) { + delete this; + } +} + +BlueStore::Onode* BlueStore::Onode::decode( + CollectionRef c, + const ghobject_t& oid, + const string& key, + const bufferlist& v) +{ + Onode* on = new Onode(c.get(), oid, key); + on->exists = true; + auto p = v.front().begin_deep(); + on->onode.decode(p); + for (auto& i : on->onode.attrs) { + i.second.reassign_to_mempool(mempool::mempool_bluestore_cache_meta); + } + + // initialize extent_map + on->extent_map.decode_spanning_blobs(p); + if (on->onode.extent_map_shards.empty()) { + denc(on->extent_map.inline_bl, p); + on->extent_map.decode_some(on->extent_map.inline_bl); + on->extent_map.inline_bl.reassign_to_mempool( + mempool::mempool_bluestore_cache_data); + } + else { + on->extent_map.init_shards(false, false); + } + return on; +} + +void BlueStore::Onode::flush() +{ + if (flushing_count.load()) { + ldout(c->store->cct, 20) << __func__ << " cnt:" << flushing_count << dendl; + waiting_count++; + std::unique_lock l(flush_lock); + while (flushing_count.load()) { + flush_cond.wait(l); + } + waiting_count--; + } + ldout(c->store->cct, 20) << __func__ << " done" << dendl; +} + +void BlueStore::Onode::dump(Formatter* f) const +{ + onode.dump(f); + extent_map.dump(f); +} + +const std::string& BlueStore::Onode::calc_omap_prefix(uint8_t flags) +{ + if (bluestore_onode_t::is_pgmeta_omap(flags)) { + return PREFIX_PGMETA_OMAP; + } + if (bluestore_onode_t::is_perpg_omap(flags)) { + return PREFIX_PERPG_OMAP; + } + if (bluestore_onode_t::is_perpool_omap(flags)) { + return PREFIX_PERPOOL_OMAP; + } + return PREFIX_OMAP; +} + +// '-' < '.' < '~' +void BlueStore::Onode::calc_omap_header( + uint8_t flags, + const Onode* o, + std::string* out) +{ + if (!bluestore_onode_t::is_pgmeta_omap(flags)) { + if (bluestore_onode_t::is_perpg_omap(flags)) { + _key_encode_u64(o->c->pool(), out); + _key_encode_u32(o->oid.hobj.get_bitwise_key_u32(), out); + } else if (bluestore_onode_t::is_perpool_omap(flags)) { + _key_encode_u64(o->c->pool(), out); + } + } + _key_encode_u64(o->onode.nid, out); + out->push_back('-'); +} + +void BlueStore::Onode::calc_omap_key(uint8_t flags, + const Onode* o, + const std::string& key, + std::string* out) +{ + if (!bluestore_onode_t::is_pgmeta_omap(flags)) { + if (bluestore_onode_t::is_perpg_omap(flags)) { + _key_encode_u64(o->c->pool(), out); + _key_encode_u32(o->oid.hobj.get_bitwise_key_u32(), out); + } else if (bluestore_onode_t::is_perpool_omap(flags)) { + _key_encode_u64(o->c->pool(), out); + } + } + _key_encode_u64(o->onode.nid, out); + out->push_back('.'); + out->append(key); +} + +void BlueStore::Onode::rewrite_omap_key(const string& old, string *out) +{ + if (!onode.is_pgmeta_omap()) { + if (onode.is_perpg_omap()) { + _key_encode_u64(c->pool(), out); + _key_encode_u32(oid.hobj.get_bitwise_key_u32(), out); + } else if (onode.is_perpool_omap()) { + _key_encode_u64(c->pool(), out); + } + } + _key_encode_u64(onode.nid, out); + out->append(old.c_str() + out->length(), old.size() - out->length()); +} + +void BlueStore::Onode::calc_omap_tail( + uint8_t flags, + const Onode* o, + std::string* out) +{ + if (!bluestore_onode_t::is_pgmeta_omap(flags)) { + if (bluestore_onode_t::is_perpg_omap(flags)) { + _key_encode_u64(o->c->pool(), out); + _key_encode_u32(o->oid.hobj.get_bitwise_key_u32(), out); + } else if (bluestore_onode_t::is_perpool_omap(flags)) { + _key_encode_u64(o->c->pool(), out); + } + } + _key_encode_u64(o->onode.nid, out); + out->push_back('~'); +} + +void BlueStore::Onode::decode_omap_key(const string& key, string *user_key) +{ + size_t pos = sizeof(uint64_t) + 1; + if (!onode.is_pgmeta_omap()) { + if (onode.is_perpg_omap()) { + pos += sizeof(uint64_t) + sizeof(uint32_t); + } else if (onode.is_perpool_omap()) { + pos += sizeof(uint64_t); + } + } + *user_key = key.substr(pos); +} + +// ======================================================= +// WriteContext + +/// Checks for writes to the same pextent within a blob +bool BlueStore::WriteContext::has_conflict( + BlobRef b, + uint64_t loffs, + uint64_t loffs_end, + uint64_t min_alloc_size) +{ + ceph_assert((loffs % min_alloc_size) == 0); + ceph_assert((loffs_end % min_alloc_size) == 0); + for (auto w : writes) { + if (b == w.b) { + auto loffs2 = p2align(w.logical_offset, min_alloc_size); + auto loffs2_end = p2roundup(w.logical_offset + w.length0, min_alloc_size); + if ((loffs <= loffs2 && loffs_end > loffs2) || + (loffs >= loffs2 && loffs < loffs2_end)) { + return true; + } + } + } + return false; +} + +// ======================================================= + +// DeferredBatch +#undef dout_prefix +#define dout_prefix *_dout << "bluestore.DeferredBatch(" << this << ") " +#undef dout_context +#define dout_context cct + +void BlueStore::DeferredBatch::prepare_write( + CephContext *cct, + uint64_t seq, uint64_t offset, uint64_t length, + bufferlist::const_iterator& blp) +{ + _discard(cct, offset, length); + auto i = iomap.insert(make_pair(offset, deferred_io())); + ceph_assert(i.second); // this should be a new insertion + i.first->second.seq = seq; + blp.copy(length, i.first->second.bl); + i.first->second.bl.reassign_to_mempool( + mempool::mempool_bluestore_writing_deferred); + dout(20) << __func__ << " seq " << seq + << " 0x" << std::hex << offset << "~" << length + << " crc " << i.first->second.bl.crc32c(-1) + << std::dec << dendl; + seq_bytes[seq] += length; +#ifdef DEBUG_DEFERRED + _audit(cct); +#endif +} + +void BlueStore::DeferredBatch::_discard( + CephContext *cct, uint64_t offset, uint64_t length) +{ + generic_dout(20) << __func__ << " 0x" << std::hex << offset << "~" << length + << std::dec << dendl; + auto p = iomap.lower_bound(offset); + if (p != iomap.begin()) { + --p; + auto end = p->first + p->second.bl.length(); + if (end > offset) { + bufferlist head; + head.substr_of(p->second.bl, 0, offset - p->first); + dout(20) << __func__ << " keep head " << p->second.seq + << " 0x" << std::hex << p->first << "~" << p->second.bl.length() + << " -> 0x" << head.length() << std::dec << dendl; + auto i = seq_bytes.find(p->second.seq); + ceph_assert(i != seq_bytes.end()); + if (end > offset + length) { + bufferlist tail; + tail.substr_of(p->second.bl, offset + length - p->first, + end - (offset + length)); + dout(20) << __func__ << " keep tail " << p->second.seq + << " 0x" << std::hex << p->first << "~" << p->second.bl.length() + << " -> 0x" << tail.length() << std::dec << dendl; + auto &n = iomap[offset + length]; + n.bl.swap(tail); + n.seq = p->second.seq; + i->second -= length; + } else { + i->second -= end - offset; + } + ceph_assert(i->second >= 0); + p->second.bl.swap(head); + } + ++p; + } + while (p != iomap.end()) { + if (p->first >= offset + length) { + break; + } + auto i = seq_bytes.find(p->second.seq); + ceph_assert(i != seq_bytes.end()); + auto end = p->first + p->second.bl.length(); + if (end > offset + length) { + unsigned drop_front = offset + length - p->first; + unsigned keep_tail = end - (offset + length); + dout(20) << __func__ << " truncate front " << p->second.seq + << " 0x" << std::hex << p->first << "~" << p->second.bl.length() + << " drop_front 0x" << drop_front << " keep_tail 0x" << keep_tail + << " to 0x" << (offset + length) << "~" << keep_tail + << std::dec << dendl; + auto &s = iomap[offset + length]; + s.seq = p->second.seq; + s.bl.substr_of(p->second.bl, drop_front, keep_tail); + i->second -= drop_front; + } else { + dout(20) << __func__ << " drop " << p->second.seq + << " 0x" << std::hex << p->first << "~" << p->second.bl.length() + << std::dec << dendl; + i->second -= p->second.bl.length(); + } + ceph_assert(i->second >= 0); + p = iomap.erase(p); + } +} + +void BlueStore::DeferredBatch::_audit(CephContext *cct) +{ + map<uint64_t,int> sb; + for (auto p : seq_bytes) { + sb[p.first] = 0; // make sure we have the same set of keys + } + uint64_t pos = 0; + for (auto& p : iomap) { + ceph_assert(p.first >= pos); + sb[p.second.seq] += p.second.bl.length(); + pos = p.first + p.second.bl.length(); + } + ceph_assert(sb == seq_bytes); +} + + +// Collection + +#undef dout_prefix +#define dout_prefix *_dout << "bluestore(" << store->path << ").collection(" << cid << " " << this << ") " + +BlueStore::Collection::Collection(BlueStore *store_, OnodeCacheShard *oc, BufferCacheShard *bc, coll_t cid) + : CollectionImpl(store_->cct, cid), + store(store_), + cache(bc), + exists(true), + onode_map(oc), + commit_queue(nullptr) +{ +} + +bool BlueStore::Collection::flush_commit(Context *c) +{ + return osr->flush_commit(c); +} + +void BlueStore::Collection::flush() +{ + osr->flush(); +} + +void BlueStore::Collection::flush_all_but_last() +{ + osr->flush_all_but_last(); +} + +void BlueStore::Collection::open_shared_blob(uint64_t sbid, BlobRef b) +{ + ceph_assert(!b->shared_blob); + const bluestore_blob_t& blob = b->get_blob(); + if (!blob.is_shared()) { + b->shared_blob = new SharedBlob(this); + return; + } + + b->shared_blob = shared_blob_set.lookup(sbid); + if (b->shared_blob) { + ldout(store->cct, 10) << __func__ << " sbid 0x" << std::hex << sbid + << std::dec << " had " << *b->shared_blob << dendl; + } else { + b->shared_blob = new SharedBlob(sbid, this); + shared_blob_set.add(this, b->shared_blob.get()); + ldout(store->cct, 10) << __func__ << " sbid 0x" << std::hex << sbid + << std::dec << " opened " << *b->shared_blob + << dendl; + } +} + +void BlueStore::Collection::load_shared_blob(SharedBlobRef sb) +{ + if (!sb->is_loaded()) { + + bufferlist v; + string key; + auto sbid = sb->get_sbid(); + get_shared_blob_key(sbid, &key); + int r = store->db->get(PREFIX_SHARED_BLOB, key, &v); + if (r < 0) { + lderr(store->cct) << __func__ << " sbid 0x" << std::hex << sbid + << std::dec << " not found at key " + << pretty_binary_string(key) << dendl; + ceph_abort_msg("uh oh, missing shared_blob"); + } + + sb->loaded = true; + sb->persistent = new bluestore_shared_blob_t(sbid); + auto p = v.cbegin(); + decode(*(sb->persistent), p); + ldout(store->cct, 10) << __func__ << " sbid 0x" << std::hex << sbid + << std::dec << " loaded shared_blob " << *sb << dendl; + } +} + +void BlueStore::Collection::make_blob_shared(uint64_t sbid, BlobRef b) +{ + ldout(store->cct, 10) << __func__ << " " << *b << dendl; + ceph_assert(!b->shared_blob->is_loaded()); + + // update blob + bluestore_blob_t& blob = b->dirty_blob(); + blob.set_flag(bluestore_blob_t::FLAG_SHARED); + + // update shared blob + b->shared_blob->loaded = true; + b->shared_blob->persistent = new bluestore_shared_blob_t(sbid); + shared_blob_set.add(this, b->shared_blob.get()); + for (auto p : blob.get_extents()) { + if (p.is_valid()) { + b->shared_blob->get_ref( + p.offset, + p.length); + } + } + ldout(store->cct, 20) << __func__ << " now " << *b << dendl; +} + +uint64_t BlueStore::Collection::make_blob_unshared(SharedBlob *sb) +{ + ldout(store->cct, 10) << __func__ << " " << *sb << dendl; + ceph_assert(sb->is_loaded()); + + uint64_t sbid = sb->get_sbid(); + shared_blob_set.remove(sb); + sb->loaded = false; + delete sb->persistent; + sb->sbid_unloaded = 0; + ldout(store->cct, 20) << __func__ << " now " << *sb << dendl; + return sbid; +} + +BlueStore::OnodeRef BlueStore::Collection::get_onode( + const ghobject_t& oid, + bool create, + bool is_createop) +{ + ceph_assert(create ? ceph_mutex_is_wlocked(lock) : ceph_mutex_is_locked(lock)); + + spg_t pgid; + if (cid.is_pg(&pgid)) { + if (!oid.match(cnode.bits, pgid.ps())) { + lderr(store->cct) << __func__ << " oid " << oid << " not part of " + << pgid << " bits " << cnode.bits << dendl; + ceph_abort(); + } + } + + OnodeRef o = onode_map.lookup(oid); + if (o) + return o; + + string key; + get_object_key(store->cct, oid, &key); + + ldout(store->cct, 20) << __func__ << " oid " << oid << " key " + << pretty_binary_string(key) << dendl; + + bufferlist v; + int r = -ENOENT; + Onode *on; + if (!is_createop) { + r = store->db->get(PREFIX_OBJ, key.c_str(), key.size(), &v); + ldout(store->cct, 20) << " r " << r << " v.len " << v.length() << dendl; + } + if (v.length() == 0) { + ceph_assert(r == -ENOENT); + if (!create) + return OnodeRef(); + + // new object, new onode + on = new Onode(this, oid, key); + } else { + // loaded + ceph_assert(r >= 0); + on = Onode::decode(this, oid, key, v); + } + o.reset(on); + return onode_map.add(oid, o); +} + +void BlueStore::Collection::split_cache( + Collection *dest) +{ + ldout(store->cct, 10) << __func__ << " to " << dest << dendl; + + auto *ocache = get_onode_cache(); + auto *ocache_dest = dest->get_onode_cache(); + + // lock cache shards + std::lock(ocache->lock, ocache_dest->lock, cache->lock, dest->cache->lock); + std::lock_guard l(ocache->lock, std::adopt_lock); + std::lock_guard l2(ocache_dest->lock, std::adopt_lock); + std::lock_guard l3(cache->lock, std::adopt_lock); + std::lock_guard l4(dest->cache->lock, std::adopt_lock); + + int destbits = dest->cnode.bits; + spg_t destpg; + bool is_pg = dest->cid.is_pg(&destpg); + ceph_assert(is_pg); + + auto p = onode_map.onode_map.begin(); + while (p != onode_map.onode_map.end()) { + OnodeRef o = p->second; + if (!p->second->oid.match(destbits, destpg.pgid.ps())) { + // onode does not belong to this child + ldout(store->cct, 20) << __func__ << " not moving " << o << " " << o->oid + << dendl; + ++p; + } else { + ldout(store->cct, 20) << __func__ << " moving " << o << " " << o->oid + << dendl; + + // ensuring that nref is always >= 2 and hence onode is pinned and + // physically out of cache during the transition + OnodeRef o_pin = o; + ceph_assert(o->pinned); + + p = onode_map.onode_map.erase(p); + dest->onode_map.onode_map[o->oid] = o; + if (o->cached) { + get_onode_cache()->move_pinned(dest->get_onode_cache(), o.get()); + } + o->c = dest; + + // move over shared blobs and buffers. cover shared blobs from + // both extent map and spanning blob map (the full extent map + // may not be faulted in) + vector<SharedBlob*> sbvec; + for (auto& e : o->extent_map.extent_map) { + sbvec.push_back(e.blob->shared_blob.get()); + } + for (auto& b : o->extent_map.spanning_blob_map) { + sbvec.push_back(b.second->shared_blob.get()); + } + for (auto sb : sbvec) { + if (sb->coll == dest) { + ldout(store->cct, 20) << __func__ << " already moved " << *sb + << dendl; + continue; + } + ldout(store->cct, 20) << __func__ << " moving " << *sb << dendl; + if (sb->get_sbid()) { + ldout(store->cct, 20) << __func__ + << " moving registration " << *sb << dendl; + shared_blob_set.remove(sb); + dest->shared_blob_set.add(dest, sb); + } + sb->coll = dest; + if (dest->cache != cache) { + for (auto& i : sb->bc.buffer_map) { + if (!i.second->is_writing()) { + ldout(store->cct, 20) << __func__ << " moving " << *i.second + << dendl; + dest->cache->_move(cache, i.second.get()); + } + } + } + } + } + } + dest->cache->_trim(); +} + +// ======================================================= + +// MempoolThread + +#undef dout_prefix +#define dout_prefix *_dout << "bluestore.MempoolThread(" << this << ") " +#undef dout_context +#define dout_context store->cct + +void *BlueStore::MempoolThread::entry() +{ + std::unique_lock l{lock}; + + uint32_t prev_config_change = store->config_changed.load(); + uint64_t base = store->osd_memory_base; + double fragmentation = store->osd_memory_expected_fragmentation; + uint64_t target = store->osd_memory_target; + uint64_t min = store->osd_memory_cache_min; + uint64_t max = min; + + // When setting the maximum amount of memory to use for cache, first + // assume some base amount of memory for the OSD and then fudge in + // some overhead for fragmentation that scales with cache usage. + uint64_t ltarget = (1.0 - fragmentation) * target; + if (ltarget > base + min) { + max = ltarget - base; + } + + binned_kv_cache = store->db->get_priority_cache(); + binned_kv_onode_cache = store->db->get_priority_cache(PREFIX_OBJ); + if (store->cache_autotune && binned_kv_cache != nullptr) { + pcm = std::make_shared<PriorityCache::Manager>( + store->cct, min, max, target, true, "bluestore-pricache"); + pcm->insert("kv", binned_kv_cache, true); + pcm->insert("meta", meta_cache, true); + pcm->insert("data", data_cache, true); + if (binned_kv_onode_cache != nullptr) { + pcm->insert("kv_onode", binned_kv_onode_cache, true); + } + } + + utime_t next_balance = ceph_clock_now(); + utime_t next_resize = ceph_clock_now(); + utime_t next_deferred_force_submit = ceph_clock_now(); + utime_t alloc_stats_dump_clock = ceph_clock_now(); + + bool interval_stats_trim = false; + while (!stop) { + // Update pcm cache settings if related configuration was changed + uint32_t cur_config_change = store->config_changed.load(); + if (cur_config_change != prev_config_change) { + _update_cache_settings(); + prev_config_change = cur_config_change; + } + + // Before we trim, check and see if it's time to rebalance/resize. + double autotune_interval = store->cache_autotune_interval; + double resize_interval = store->osd_memory_cache_resize_interval; + double max_defer_interval = store->max_defer_interval; + + double alloc_stats_dump_interval = + store->cct->_conf->bluestore_alloc_stats_dump_interval; + + if (alloc_stats_dump_interval > 0 && + alloc_stats_dump_clock + alloc_stats_dump_interval < ceph_clock_now()) { + store->_record_allocation_stats(); + alloc_stats_dump_clock = ceph_clock_now(); + } + if (autotune_interval > 0 && next_balance < ceph_clock_now()) { + _adjust_cache_settings(); + + // Log events at 5 instead of 20 when balance happens. + interval_stats_trim = true; + + if (pcm != nullptr) { + pcm->balance(); + } + + next_balance = ceph_clock_now(); + next_balance += autotune_interval; + } + if (resize_interval > 0 && next_resize < ceph_clock_now()) { + if (ceph_using_tcmalloc() && pcm != nullptr) { + pcm->tune_memory(); + } + next_resize = ceph_clock_now(); + next_resize += resize_interval; + } + + if (max_defer_interval > 0 && + next_deferred_force_submit < ceph_clock_now()) { + if (store->get_deferred_last_submitted() + max_defer_interval < + ceph_clock_now()) { + store->deferred_try_submit(); + } + next_deferred_force_submit = ceph_clock_now(); + next_deferred_force_submit += max_defer_interval/3; + } + + // Now Resize the shards + _resize_shards(interval_stats_trim); + interval_stats_trim = false; + + store->_update_cache_logger(); + auto wait = ceph::make_timespan( + store->cct->_conf->bluestore_cache_trim_interval); + cond.wait_for(l, wait); + } + // do final dump + store->_record_allocation_stats(); + stop = false; + pcm = nullptr; + return NULL; +} + +void BlueStore::MempoolThread::_adjust_cache_settings() +{ + if (binned_kv_cache != nullptr) { + binned_kv_cache->set_cache_ratio(store->cache_kv_ratio); + } + if (binned_kv_onode_cache != nullptr) { + binned_kv_onode_cache->set_cache_ratio(store->cache_kv_onode_ratio); + } + meta_cache->set_cache_ratio(store->cache_meta_ratio); + data_cache->set_cache_ratio(store->cache_data_ratio); +} + +void BlueStore::MempoolThread::_resize_shards(bool interval_stats) +{ + size_t onode_shards = store->onode_cache_shards.size(); + size_t buffer_shards = store->buffer_cache_shards.size(); + int64_t kv_used = store->db->get_cache_usage(); + int64_t kv_onode_used = store->db->get_cache_usage(PREFIX_OBJ); + int64_t meta_used = meta_cache->_get_used_bytes(); + int64_t data_used = data_cache->_get_used_bytes(); + + uint64_t cache_size = store->cache_size; + int64_t kv_alloc = + static_cast<int64_t>(store->cache_kv_ratio * cache_size); + int64_t kv_onode_alloc = + static_cast<int64_t>(store->cache_kv_onode_ratio * cache_size); + int64_t meta_alloc = + static_cast<int64_t>(store->cache_meta_ratio * cache_size); + int64_t data_alloc = + static_cast<int64_t>(store->cache_data_ratio * cache_size); + + if (pcm != nullptr && binned_kv_cache != nullptr) { + cache_size = pcm->get_tuned_mem(); + kv_alloc = binned_kv_cache->get_committed_size(); + meta_alloc = meta_cache->get_committed_size(); + data_alloc = data_cache->get_committed_size(); + if (binned_kv_onode_cache != nullptr) { + kv_onode_alloc = binned_kv_onode_cache->get_committed_size(); + } + } + + if (interval_stats) { + dout(5) << __func__ << " cache_size: " << cache_size + << " kv_alloc: " << kv_alloc + << " kv_used: " << kv_used + << " kv_onode_alloc: " << kv_onode_alloc + << " kv_onode_used: " << kv_onode_used + << " meta_alloc: " << meta_alloc + << " meta_used: " << meta_used + << " data_alloc: " << data_alloc + << " data_used: " << data_used << dendl; + } else { + dout(20) << __func__ << " cache_size: " << cache_size + << " kv_alloc: " << kv_alloc + << " kv_used: " << kv_used + << " kv_onode_alloc: " << kv_onode_alloc + << " kv_onode_used: " << kv_onode_used + << " meta_alloc: " << meta_alloc + << " meta_used: " << meta_used + << " data_alloc: " << data_alloc + << " data_used: " << data_used << dendl; + } + + uint64_t max_shard_onodes = static_cast<uint64_t>( + (meta_alloc / (double) onode_shards) / meta_cache->get_bytes_per_onode()); + uint64_t max_shard_buffer = static_cast<uint64_t>(data_alloc / buffer_shards); + + dout(30) << __func__ << " max_shard_onodes: " << max_shard_onodes + << " max_shard_buffer: " << max_shard_buffer << dendl; + + for (auto i : store->onode_cache_shards) { + i->set_max(max_shard_onodes); + } + for (auto i : store->buffer_cache_shards) { + i->set_max(max_shard_buffer); + } +} + +void BlueStore::MempoolThread::_update_cache_settings() +{ + // Nothing to do if pcm is not used. + if (pcm == nullptr) { + return; + } + + uint64_t target = store->osd_memory_target; + uint64_t base = store->osd_memory_base; + uint64_t min = store->osd_memory_cache_min; + uint64_t max = min; + double fragmentation = store->osd_memory_expected_fragmentation; + + uint64_t ltarget = (1.0 - fragmentation) * target; + if (ltarget > base + min) { + max = ltarget - base; + } + + // set pcm cache levels + pcm->set_target_memory(target); + pcm->set_min_memory(min); + pcm->set_max_memory(max); + + dout(5) << __func__ << " updated pcm target: " << target + << " pcm min: " << min + << " pcm max: " << max + << dendl; +} + +// ======================================================= + +// OmapIteratorImpl + +#undef dout_prefix +#define dout_prefix *_dout << "bluestore.OmapIteratorImpl(" << this << ") " + +BlueStore::OmapIteratorImpl::OmapIteratorImpl( + CollectionRef c, OnodeRef o, KeyValueDB::Iterator it) + : c(c), o(o), it(it) +{ + std::shared_lock l(c->lock); + if (o->onode.has_omap()) { + o->get_omap_key(string(), &head); + o->get_omap_tail(&tail); + it->lower_bound(head); + } +} + +string BlueStore::OmapIteratorImpl::_stringify() const +{ + stringstream s; + s << " omap_iterator(cid = " << c->cid + <<", oid = " << o->oid << ")"; + return s.str(); +} + +int BlueStore::OmapIteratorImpl::seek_to_first() +{ + std::shared_lock l(c->lock); + auto start1 = mono_clock::now(); + if (o->onode.has_omap()) { + it->lower_bound(head); + } else { + it = KeyValueDB::Iterator(); + } + c->store->log_latency( + __func__, + l_bluestore_omap_seek_to_first_lat, + mono_clock::now() - start1, + c->store->cct->_conf->bluestore_log_omap_iterator_age); + + return 0; +} + +int BlueStore::OmapIteratorImpl::upper_bound(const string& after) +{ + std::shared_lock l(c->lock); + auto start1 = mono_clock::now(); + if (o->onode.has_omap()) { + string key; + o->get_omap_key(after, &key); + ldout(c->store->cct,20) << __func__ << " after " << after << " key " + << pretty_binary_string(key) << dendl; + it->upper_bound(key); + } else { + it = KeyValueDB::Iterator(); + } + c->store->log_latency_fn( + __func__, + l_bluestore_omap_upper_bound_lat, + mono_clock::now() - start1, + c->store->cct->_conf->bluestore_log_omap_iterator_age, + [&] (const ceph::timespan& lat) { + return ", after = " + after + + _stringify(); + } + ); + return 0; +} + +int BlueStore::OmapIteratorImpl::lower_bound(const string& to) +{ + std::shared_lock l(c->lock); + auto start1 = mono_clock::now(); + if (o->onode.has_omap()) { + string key; + o->get_omap_key(to, &key); + ldout(c->store->cct,20) << __func__ << " to " << to << " key " + << pretty_binary_string(key) << dendl; + it->lower_bound(key); + } else { + it = KeyValueDB::Iterator(); + } + c->store->log_latency_fn( + __func__, + l_bluestore_omap_lower_bound_lat, + mono_clock::now() - start1, + c->store->cct->_conf->bluestore_log_omap_iterator_age, + [&] (const ceph::timespan& lat) { + return ", to = " + to + + _stringify(); + } + ); + return 0; +} + +bool BlueStore::OmapIteratorImpl::valid() +{ + std::shared_lock l(c->lock); + bool r = o->onode.has_omap() && it && it->valid() && + it->raw_key().second < tail; + if (it && it->valid()) { + ldout(c->store->cct,20) << __func__ << " is at " + << pretty_binary_string(it->raw_key().second) + << dendl; + } + return r; +} + +int BlueStore::OmapIteratorImpl::next() +{ + int r = -1; + std::shared_lock l(c->lock); + auto start1 = mono_clock::now(); + if (o->onode.has_omap()) { + it->next(); + r = 0; + } + c->store->log_latency( + __func__, + l_bluestore_omap_next_lat, + mono_clock::now() - start1, + c->store->cct->_conf->bluestore_log_omap_iterator_age); + + return r; +} + +string BlueStore::OmapIteratorImpl::key() +{ + std::shared_lock l(c->lock); + ceph_assert(it->valid()); + string db_key = it->raw_key().second; + string user_key; + o->decode_omap_key(db_key, &user_key); + + return user_key; +} + +bufferlist BlueStore::OmapIteratorImpl::value() +{ + std::shared_lock l(c->lock); + ceph_assert(it->valid()); + return it->value(); +} + + +// ===================================== + +#undef dout_prefix +#define dout_prefix *_dout << "bluestore(" << path << ") " +#undef dout_context +#define dout_context cct + + +static void aio_cb(void *priv, void *priv2) +{ + BlueStore *store = static_cast<BlueStore*>(priv); + BlueStore::AioContext *c = static_cast<BlueStore::AioContext*>(priv2); + c->aio_finish(store); +} + +static void discard_cb(void *priv, void *priv2) +{ + BlueStore *store = static_cast<BlueStore*>(priv); + interval_set<uint64_t> *tmp = static_cast<interval_set<uint64_t>*>(priv2); + store->handle_discard(*tmp); +} + +void BlueStore::handle_discard(interval_set<uint64_t>& to_release) +{ + dout(10) << __func__ << dendl; + ceph_assert(shared_alloc.a); + shared_alloc.a->release(to_release); +} + +BlueStore::BlueStore(CephContext *cct, const string& path) + : BlueStore(cct, path, 0) {} + +BlueStore::BlueStore(CephContext *cct, + const string& path, + uint64_t _min_alloc_size) + : ObjectStore(cct, path), + throttle(cct), + finisher(cct, "commit_finisher", "cfin"), + kv_sync_thread(this), + kv_finalize_thread(this), + zoned_cleaner_thread(this), + min_alloc_size(_min_alloc_size), + min_alloc_size_order(ctz(_min_alloc_size)), + mempool_thread(this) +{ + _init_logger(); + cct->_conf.add_observer(this); + set_cache_shards(1); +} + +BlueStore::~BlueStore() +{ + cct->_conf.remove_observer(this); + _shutdown_logger(); + ceph_assert(!mounted); + ceph_assert(db == NULL); + ceph_assert(bluefs == NULL); + ceph_assert(fsid_fd < 0); + ceph_assert(path_fd < 0); + for (auto i : onode_cache_shards) { + delete i; + } + for (auto i : buffer_cache_shards) { + delete i; + } + onode_cache_shards.clear(); + buffer_cache_shards.clear(); +} + +const char **BlueStore::get_tracked_conf_keys() const +{ + static const char* KEYS[] = { + "bluestore_csum_type", + "bluestore_compression_mode", + "bluestore_compression_algorithm", + "bluestore_compression_min_blob_size", + "bluestore_compression_min_blob_size_ssd", + "bluestore_compression_min_blob_size_hdd", + "bluestore_compression_max_blob_size", + "bluestore_compression_max_blob_size_ssd", + "bluestore_compression_max_blob_size_hdd", + "bluestore_compression_required_ratio", + "bluestore_max_alloc_size", + "bluestore_prefer_deferred_size", + "bluestore_prefer_deferred_size_hdd", + "bluestore_prefer_deferred_size_ssd", + "bluestore_deferred_batch_ops", + "bluestore_deferred_batch_ops_hdd", + "bluestore_deferred_batch_ops_ssd", + "bluestore_throttle_bytes", + "bluestore_throttle_deferred_bytes", + "bluestore_throttle_cost_per_io_hdd", + "bluestore_throttle_cost_per_io_ssd", + "bluestore_throttle_cost_per_io", + "bluestore_max_blob_size", + "bluestore_max_blob_size_ssd", + "bluestore_max_blob_size_hdd", + "osd_memory_target", + "osd_memory_target_cgroup_limit_ratio", + "osd_memory_base", + "osd_memory_cache_min", + "osd_memory_expected_fragmentation", + "bluestore_cache_autotune", + "bluestore_cache_autotune_interval", + "bluestore_warn_on_legacy_statfs", + "bluestore_warn_on_no_per_pool_omap", + "bluestore_max_defer_interval", + NULL + }; + return KEYS; +} + +void BlueStore::handle_conf_change(const ConfigProxy& conf, + const std::set<std::string> &changed) +{ + if (changed.count("bluestore_warn_on_legacy_statfs")) { + _check_legacy_statfs_alert(); + } + if (changed.count("bluestore_warn_on_no_per_pool_omap") || + changed.count("bluestore_warn_on_no_per_pg_omap")) { + _check_no_per_pg_or_pool_omap_alert(); + } + + if (changed.count("bluestore_csum_type")) { + _set_csum(); + } + if (changed.count("bluestore_compression_mode") || + changed.count("bluestore_compression_algorithm") || + changed.count("bluestore_compression_min_blob_size") || + changed.count("bluestore_compression_max_blob_size")) { + if (bdev) { + _set_compression(); + } + } + if (changed.count("bluestore_max_blob_size") || + changed.count("bluestore_max_blob_size_ssd") || + changed.count("bluestore_max_blob_size_hdd")) { + if (bdev) { + // only after startup + _set_blob_size(); + } + } + if (changed.count("bluestore_prefer_deferred_size") || + changed.count("bluestore_prefer_deferred_size_hdd") || + changed.count("bluestore_prefer_deferred_size_ssd") || + changed.count("bluestore_max_alloc_size") || + changed.count("bluestore_deferred_batch_ops") || + changed.count("bluestore_deferred_batch_ops_hdd") || + changed.count("bluestore_deferred_batch_ops_ssd")) { + if (bdev) { + // only after startup + _set_alloc_sizes(); + } + } + if (changed.count("bluestore_throttle_cost_per_io") || + changed.count("bluestore_throttle_cost_per_io_hdd") || + changed.count("bluestore_throttle_cost_per_io_ssd")) { + if (bdev) { + _set_throttle_params(); + } + } + if (changed.count("bluestore_throttle_bytes") || + changed.count("bluestore_throttle_deferred_bytes") || + changed.count("bluestore_throttle_trace_rate")) { + throttle.reset_throttle(conf); + } + if (changed.count("bluestore_max_defer_interval")) { + if (bdev) { + _set_max_defer_interval(); + } + } + if (changed.count("osd_memory_target") || + changed.count("osd_memory_base") || + changed.count("osd_memory_cache_min") || + changed.count("osd_memory_expected_fragmentation")) { + _update_osd_memory_options(); + } +} + +void BlueStore::_set_compression() +{ + auto m = Compressor::get_comp_mode_type(cct->_conf->bluestore_compression_mode); + if (m) { + _clear_compression_alert(); + comp_mode = *m; + } else { + derr << __func__ << " unrecognized value '" + << cct->_conf->bluestore_compression_mode + << "' for bluestore_compression_mode, reverting to 'none'" + << dendl; + comp_mode = Compressor::COMP_NONE; + string s("unknown mode: "); + s += cct->_conf->bluestore_compression_mode; + _set_compression_alert(true, s.c_str()); + } + + compressor = nullptr; + + if (cct->_conf->bluestore_compression_min_blob_size) { + comp_min_blob_size = cct->_conf->bluestore_compression_min_blob_size; + } else { + ceph_assert(bdev); + if (_use_rotational_settings()) { + comp_min_blob_size = cct->_conf->bluestore_compression_min_blob_size_hdd; + } else { + comp_min_blob_size = cct->_conf->bluestore_compression_min_blob_size_ssd; + } + } + + if (cct->_conf->bluestore_compression_max_blob_size) { + comp_max_blob_size = cct->_conf->bluestore_compression_max_blob_size; + } else { + ceph_assert(bdev); + if (_use_rotational_settings()) { + comp_max_blob_size = cct->_conf->bluestore_compression_max_blob_size_hdd; + } else { + comp_max_blob_size = cct->_conf->bluestore_compression_max_blob_size_ssd; + } + } + + auto& alg_name = cct->_conf->bluestore_compression_algorithm; + if (!alg_name.empty()) { + compressor = Compressor::create(cct, alg_name); + if (!compressor) { + derr << __func__ << " unable to initialize " << alg_name.c_str() << " compressor" + << dendl; + _set_compression_alert(false, alg_name.c_str()); + } + } + + dout(10) << __func__ << " mode " << Compressor::get_comp_mode_name(comp_mode) + << " alg " << (compressor ? compressor->get_type_name() : "(none)") + << " min_blob " << comp_min_blob_size + << " max_blob " << comp_max_blob_size + << dendl; +} + +void BlueStore::_set_csum() +{ + csum_type = Checksummer::CSUM_NONE; + int t = Checksummer::get_csum_string_type(cct->_conf->bluestore_csum_type); + if (t > Checksummer::CSUM_NONE) + csum_type = t; + + dout(10) << __func__ << " csum_type " + << Checksummer::get_csum_type_string(csum_type) + << dendl; +} + +void BlueStore::_set_throttle_params() +{ + if (cct->_conf->bluestore_throttle_cost_per_io) { + throttle_cost_per_io = cct->_conf->bluestore_throttle_cost_per_io; + } else { + ceph_assert(bdev); + if (_use_rotational_settings()) { + throttle_cost_per_io = cct->_conf->bluestore_throttle_cost_per_io_hdd; + } else { + throttle_cost_per_io = cct->_conf->bluestore_throttle_cost_per_io_ssd; + } + } + + dout(10) << __func__ << " throttle_cost_per_io " << throttle_cost_per_io + << dendl; +} +void BlueStore::_set_blob_size() +{ + if (cct->_conf->bluestore_max_blob_size) { + max_blob_size = cct->_conf->bluestore_max_blob_size; + } else { + ceph_assert(bdev); + if (_use_rotational_settings()) { + max_blob_size = cct->_conf->bluestore_max_blob_size_hdd; + } else { + max_blob_size = cct->_conf->bluestore_max_blob_size_ssd; + } + } + dout(10) << __func__ << " max_blob_size 0x" << std::hex << max_blob_size + << std::dec << dendl; +} + +void BlueStore::_update_osd_memory_options() +{ + osd_memory_target = cct->_conf.get_val<Option::size_t>("osd_memory_target"); + osd_memory_base = cct->_conf.get_val<Option::size_t>("osd_memory_base"); + osd_memory_expected_fragmentation = cct->_conf.get_val<double>("osd_memory_expected_fragmentation"); + osd_memory_cache_min = cct->_conf.get_val<Option::size_t>("osd_memory_cache_min"); + config_changed++; + dout(10) << __func__ + << " osd_memory_target " << osd_memory_target + << " osd_memory_base " << osd_memory_base + << " osd_memory_expected_fragmentation " << osd_memory_expected_fragmentation + << " osd_memory_cache_min " << osd_memory_cache_min + << dendl; +} + +int BlueStore::_set_cache_sizes() +{ + ceph_assert(bdev); + cache_autotune = cct->_conf.get_val<bool>("bluestore_cache_autotune"); + cache_autotune_interval = + cct->_conf.get_val<double>("bluestore_cache_autotune_interval"); + osd_memory_target = cct->_conf.get_val<Option::size_t>("osd_memory_target"); + osd_memory_base = cct->_conf.get_val<Option::size_t>("osd_memory_base"); + osd_memory_expected_fragmentation = + cct->_conf.get_val<double>("osd_memory_expected_fragmentation"); + osd_memory_cache_min = cct->_conf.get_val<Option::size_t>("osd_memory_cache_min"); + osd_memory_cache_resize_interval = + cct->_conf.get_val<double>("osd_memory_cache_resize_interval"); + + if (cct->_conf->bluestore_cache_size) { + cache_size = cct->_conf->bluestore_cache_size; + } else { + // choose global cache size based on backend type + if (_use_rotational_settings()) { + cache_size = cct->_conf->bluestore_cache_size_hdd; + } else { + cache_size = cct->_conf->bluestore_cache_size_ssd; + } + } + + cache_meta_ratio = cct->_conf.get_val<double>("bluestore_cache_meta_ratio"); + if (cache_meta_ratio < 0 || cache_meta_ratio > 1.0) { + derr << __func__ << " bluestore_cache_meta_ratio (" << cache_meta_ratio + << ") must be in range [0,1.0]" << dendl; + return -EINVAL; + } + + cache_kv_ratio = cct->_conf.get_val<double>("bluestore_cache_kv_ratio"); + if (cache_kv_ratio < 0 || cache_kv_ratio > 1.0) { + derr << __func__ << " bluestore_cache_kv_ratio (" << cache_kv_ratio + << ") must be in range [0,1.0]" << dendl; + return -EINVAL; + } + + cache_kv_onode_ratio = cct->_conf.get_val<double>("bluestore_cache_kv_onode_ratio"); + if (cache_kv_onode_ratio < 0 || cache_kv_onode_ratio > 1.0) { + derr << __func__ << " bluestore_cache_kv_onode_ratio (" << cache_kv_onode_ratio + << ") must be in range [0,1.0]" << dendl; + return -EINVAL; + } + + if (cache_meta_ratio + cache_kv_ratio > 1.0) { + derr << __func__ << " bluestore_cache_meta_ratio (" << cache_meta_ratio + << ") + bluestore_cache_kv_ratio (" << cache_kv_ratio + << ") = " << cache_meta_ratio + cache_kv_ratio << "; must be <= 1.0" + << dendl; + return -EINVAL; + } + + cache_data_ratio = (double)1.0 - + (double)cache_meta_ratio - + (double)cache_kv_ratio - + (double)cache_kv_onode_ratio; + if (cache_data_ratio < 0) { + // deal with floating point imprecision + cache_data_ratio = 0; + } + + dout(1) << __func__ << " cache_size " << cache_size + << " meta " << cache_meta_ratio + << " kv " << cache_kv_ratio + << " data " << cache_data_ratio + << dendl; + return 0; +} + +int BlueStore::write_meta(const std::string& key, const std::string& value) +{ + bluestore_bdev_label_t label; + string p = path + "/block"; + int r = _read_bdev_label(cct, p, &label); + if (r < 0) { + return ObjectStore::write_meta(key, value); + } + label.meta[key] = value; + r = _write_bdev_label(cct, p, label); + ceph_assert(r == 0); + return ObjectStore::write_meta(key, value); +} + +int BlueStore::read_meta(const std::string& key, std::string *value) +{ + bluestore_bdev_label_t label; + string p = path + "/block"; + int r = _read_bdev_label(cct, p, &label); + if (r < 0) { + return ObjectStore::read_meta(key, value); + } + auto i = label.meta.find(key); + if (i == label.meta.end()) { + return ObjectStore::read_meta(key, value); + } + *value = i->second; + return 0; +} + +void BlueStore::_init_logger() +{ + PerfCountersBuilder b(cct, "bluestore", + l_bluestore_first, l_bluestore_last); + b.add_time_avg(l_bluestore_kv_flush_lat, "kv_flush_lat", + "Average kv_thread flush latency", + "fl_l", PerfCountersBuilder::PRIO_INTERESTING); + b.add_time_avg(l_bluestore_kv_commit_lat, "kv_commit_lat", + "Average kv_thread commit latency"); + b.add_time_avg(l_bluestore_kv_sync_lat, "kv_sync_lat", + "Average kv_sync thread latency", + "ks_l", PerfCountersBuilder::PRIO_INTERESTING); + b.add_time_avg(l_bluestore_kv_final_lat, "kv_final_lat", + "Average kv_finalize thread latency", + "kf_l", PerfCountersBuilder::PRIO_INTERESTING); + b.add_time_avg(l_bluestore_state_prepare_lat, "state_prepare_lat", + "Average prepare state latency"); + b.add_time_avg(l_bluestore_state_aio_wait_lat, "state_aio_wait_lat", + "Average aio_wait state latency", + "io_l", PerfCountersBuilder::PRIO_INTERESTING); + b.add_time_avg(l_bluestore_state_io_done_lat, "state_io_done_lat", + "Average io_done state latency"); + b.add_time_avg(l_bluestore_state_kv_queued_lat, "state_kv_queued_lat", + "Average kv_queued state latency"); + b.add_time_avg(l_bluestore_state_kv_committing_lat, "state_kv_commiting_lat", + "Average kv_commiting state latency"); + b.add_time_avg(l_bluestore_state_kv_done_lat, "state_kv_done_lat", + "Average kv_done state latency"); + b.add_time_avg(l_bluestore_state_deferred_queued_lat, "state_deferred_queued_lat", + "Average deferred_queued state latency"); + b.add_time_avg(l_bluestore_state_deferred_aio_wait_lat, "state_deferred_aio_wait_lat", + "Average aio_wait state latency"); + b.add_time_avg(l_bluestore_state_deferred_cleanup_lat, "state_deferred_cleanup_lat", + "Average cleanup state latency"); + b.add_time_avg(l_bluestore_state_finishing_lat, "state_finishing_lat", + "Average finishing state latency"); + b.add_time_avg(l_bluestore_state_done_lat, "state_done_lat", + "Average done state latency"); + b.add_time_avg(l_bluestore_throttle_lat, "throttle_lat", + "Average submit throttle latency", + "th_l", PerfCountersBuilder::PRIO_CRITICAL); + b.add_time_avg(l_bluestore_submit_lat, "submit_lat", + "Average submit latency", + "s_l", PerfCountersBuilder::PRIO_CRITICAL); + b.add_time_avg(l_bluestore_commit_lat, "commit_lat", + "Average commit latency", + "c_l", PerfCountersBuilder::PRIO_CRITICAL); + b.add_time_avg(l_bluestore_read_lat, "read_lat", + "Average read latency", + "r_l", PerfCountersBuilder::PRIO_CRITICAL); + b.add_time_avg(l_bluestore_read_onode_meta_lat, "read_onode_meta_lat", + "Average read onode metadata latency"); + b.add_time_avg(l_bluestore_read_wait_aio_lat, "read_wait_aio_lat", + "Average read latency"); + b.add_time_avg(l_bluestore_compress_lat, "compress_lat", + "Average compress latency"); + b.add_time_avg(l_bluestore_decompress_lat, "decompress_lat", + "Average decompress latency"); + b.add_time_avg(l_bluestore_csum_lat, "csum_lat", + "Average checksum latency"); + b.add_u64_counter(l_bluestore_compress_success_count, "compress_success_count", + "Sum for beneficial compress ops"); + b.add_u64_counter(l_bluestore_compress_rejected_count, "compress_rejected_count", + "Sum for compress ops rejected due to low net gain of space"); + b.add_u64_counter(l_bluestore_write_pad_bytes, "write_pad_bytes", + "Sum for write-op padded bytes", NULL, 0, unit_t(UNIT_BYTES)); + b.add_u64_counter(l_bluestore_deferred_write_ops, "deferred_write_ops", + "Sum for deferred write op"); + b.add_u64_counter(l_bluestore_deferred_write_bytes, "deferred_write_bytes", + "Sum for deferred write bytes", "def", 0, unit_t(UNIT_BYTES)); + b.add_u64_counter(l_bluestore_write_penalty_read_ops, "write_penalty_read_ops", + "Sum for write penalty read ops"); + b.add_u64(l_bluestore_allocated, "bluestore_allocated", + "Sum for allocated bytes"); + b.add_u64(l_bluestore_stored, "bluestore_stored", + "Sum for stored bytes"); + b.add_u64(l_bluestore_compressed, "bluestore_compressed", + "Sum for stored compressed bytes", + "c", PerfCountersBuilder::PRIO_USEFUL, unit_t(UNIT_BYTES)); + b.add_u64(l_bluestore_compressed_allocated, "bluestore_compressed_allocated", + "Sum for bytes allocated for compressed data", + "c_a", PerfCountersBuilder::PRIO_USEFUL, unit_t(UNIT_BYTES)); + b.add_u64(l_bluestore_compressed_original, "bluestore_compressed_original", + "Sum for original bytes that were compressed", + "c_o", PerfCountersBuilder::PRIO_USEFUL, unit_t(UNIT_BYTES)); + b.add_u64(l_bluestore_onodes, "bluestore_onodes", + "Number of onodes in cache"); + b.add_u64(l_bluestore_pinned_onodes, "bluestore_pinned_onodes", + "Number of pinned onodes in cache"); + b.add_u64_counter(l_bluestore_onode_hits, "onode_hits", + "Count of onode cache lookup hits", + "o_ht", PerfCountersBuilder::PRIO_USEFUL); + b.add_u64_counter(l_bluestore_onode_misses, "onode_misses", + "Count of onode cache lookup misses", + "o_ms", PerfCountersBuilder::PRIO_USEFUL); + b.add_u64_counter(l_bluestore_onode_shard_hits, "onode_shard_hits", + "Sum for onode-shard lookups hit in the cache"); + b.add_u64_counter(l_bluestore_onode_shard_misses, + "bluestore_onode_shard_misses", + "Sum for onode-shard lookups missed in the cache"); + b.add_u64(l_bluestore_extents, "bluestore_extents", + "Number of extents in cache"); + b.add_u64(l_bluestore_blobs, "bluestore_blobs", + "Number of blobs in cache"); + b.add_u64(l_bluestore_buffers, "bluestore_buffers", + "Number of buffers in cache"); + b.add_u64(l_bluestore_buffer_bytes, "bluestore_buffer_bytes", + "Number of buffer bytes in cache", NULL, 0, unit_t(UNIT_BYTES)); + b.add_u64_counter(l_bluestore_buffer_hit_bytes, "bluestore_buffer_hit_bytes", + "Sum for bytes of read hit in the cache", NULL, 0, unit_t(UNIT_BYTES)); + b.add_u64_counter(l_bluestore_buffer_miss_bytes, "bluestore_buffer_miss_bytes", + "Sum for bytes of read missed in the cache", NULL, 0, unit_t(UNIT_BYTES)); + + b.add_u64_counter(l_bluestore_write_big, "bluestore_write_big", + "Large aligned writes into fresh blobs"); + b.add_u64_counter(l_bluestore_write_big_bytes, "bluestore_write_big_bytes", + "Large aligned writes into fresh blobs (bytes)", NULL, 0, unit_t(UNIT_BYTES)); + b.add_u64_counter(l_bluestore_write_big_blobs, "bluestore_write_big_blobs", + "Large aligned writes into fresh blobs (blobs)"); + b.add_u64_counter(l_bluestore_write_big_deferred, + "bluestore_write_big_deferred", + "Big overwrites using deferred"); + b.add_u64_counter(l_bluestore_write_small, "bluestore_write_small", + "Small writes into existing or sparse small blobs"); + b.add_u64_counter(l_bluestore_write_small_bytes, "bluestore_write_small_bytes", + "Small writes into existing or sparse small blobs (bytes)", NULL, 0, unit_t(UNIT_BYTES)); + b.add_u64_counter(l_bluestore_write_small_unused, + "bluestore_write_small_unused", + "Small writes into unused portion of existing blob"); + b.add_u64_counter(l_bluestore_write_deferred, + "bluestore_write_deferred", + "Total deferred writes submitted"); + b.add_u64_counter(l_bluestore_write_deferred_bytes, + "bluestore_write_deferred_bytes", + "Total bytes submitted as deferred writes"); + b.add_u64_counter(l_bluestore_write_small_pre_read, + "bluestore_write_small_pre_read", + "Small writes that required we read some data (possibly " + "cached) to fill out the block"); + b.add_u64_counter(l_bluestore_write_new, "bluestore_write_new", + "Write into new blob"); + + b.add_u64_counter(l_bluestore_txc, "bluestore_txc", "Transactions committed"); + b.add_u64_counter(l_bluestore_onode_reshard, "bluestore_onode_reshard", + "Onode extent map reshard events"); + b.add_u64_counter(l_bluestore_blob_split, "bluestore_blob_split", + "Sum for blob splitting due to resharding"); + b.add_u64_counter(l_bluestore_extent_compress, "bluestore_extent_compress", + "Sum for extents that have been removed due to compression"); + b.add_u64_counter(l_bluestore_gc_merged, "bluestore_gc_merged", + "Sum for extents that have been merged due to garbage " + "collection"); + b.add_u64_counter(l_bluestore_read_eio, "bluestore_read_eio", + "Read EIO errors propagated to high level callers"); + b.add_u64_counter(l_bluestore_reads_with_retries, "bluestore_reads_with_retries", + "Read operations that required at least one retry due to failed checksum validation"); + b.add_u64(l_bluestore_fragmentation, "bluestore_fragmentation_micros", + "How fragmented bluestore free space is (free extents / max possible number of free extents) * 1000"); + b.add_time_avg(l_bluestore_omap_seek_to_first_lat, "omap_seek_to_first_lat", + "Average omap iterator seek_to_first call latency"); + b.add_time_avg(l_bluestore_omap_upper_bound_lat, "omap_upper_bound_lat", + "Average omap iterator upper_bound call latency"); + b.add_time_avg(l_bluestore_omap_lower_bound_lat, "omap_lower_bound_lat", + "Average omap iterator lower_bound call latency"); + b.add_time_avg(l_bluestore_omap_next_lat, "omap_next_lat", + "Average omap iterator next call latency"); + b.add_time_avg(l_bluestore_omap_get_keys_lat, "omap_get_keys_lat", + "Average omap get_keys call latency"); + b.add_time_avg(l_bluestore_omap_get_values_lat, "omap_get_values_lat", + "Average omap get_values call latency"); + b.add_time_avg(l_bluestore_clist_lat, "clist_lat", + "Average collection listing latency"); + b.add_time_avg(l_bluestore_remove_lat, "remove_lat", + "Average removal latency"); + + logger = b.create_perf_counters(); + cct->get_perfcounters_collection()->add(logger); +} + +int BlueStore::_reload_logger() +{ + struct store_statfs_t store_statfs; + int r = statfs(&store_statfs); + if (r >= 0) { + logger->set(l_bluestore_allocated, store_statfs.allocated); + logger->set(l_bluestore_stored, store_statfs.data_stored); + logger->set(l_bluestore_compressed, store_statfs.data_compressed); + logger->set(l_bluestore_compressed_allocated, store_statfs.data_compressed_allocated); + logger->set(l_bluestore_compressed_original, store_statfs.data_compressed_original); + } + return r; +} + +void BlueStore::_shutdown_logger() +{ + cct->get_perfcounters_collection()->remove(logger); + delete logger; +} + +int BlueStore::get_block_device_fsid(CephContext* cct, const string& path, + uuid_d *fsid) +{ + bluestore_bdev_label_t label; + int r = _read_bdev_label(cct, path, &label); + if (r < 0) + return r; + *fsid = label.osd_uuid; + return 0; +} + +int BlueStore::_open_path() +{ + // sanity check(s) + ceph_assert(path_fd < 0); + path_fd = TEMP_FAILURE_RETRY(::open(path.c_str(), O_DIRECTORY|O_CLOEXEC)); + if (path_fd < 0) { + int r = -errno; + derr << __func__ << " unable to open " << path << ": " << cpp_strerror(r) + << dendl; + return r; + } + return 0; +} + +void BlueStore::_close_path() +{ + VOID_TEMP_FAILURE_RETRY(::close(path_fd)); + path_fd = -1; +} + +int BlueStore::_write_bdev_label(CephContext *cct, + string path, bluestore_bdev_label_t label) +{ + dout(10) << __func__ << " path " << path << " label " << label << dendl; + bufferlist bl; + encode(label, bl); + uint32_t crc = bl.crc32c(-1); + encode(crc, bl); + ceph_assert(bl.length() <= BDEV_LABEL_BLOCK_SIZE); + bufferptr z(BDEV_LABEL_BLOCK_SIZE - bl.length()); + z.zero(); + bl.append(std::move(z)); + + int fd = TEMP_FAILURE_RETRY(::open(path.c_str(), O_WRONLY|O_CLOEXEC|O_DIRECT)); + if (fd < 0) { + fd = -errno; + derr << __func__ << " failed to open " << path << ": " << cpp_strerror(fd) + << dendl; + return fd; + } + bl.rebuild_aligned_size_and_memory(BDEV_LABEL_BLOCK_SIZE, BDEV_LABEL_BLOCK_SIZE, IOV_MAX); + int r = bl.write_fd(fd); + if (r < 0) { + derr << __func__ << " failed to write to " << path + << ": " << cpp_strerror(r) << dendl; + goto out; + } + r = ::fsync(fd); + if (r < 0) { + derr << __func__ << " failed to fsync " << path + << ": " << cpp_strerror(r) << dendl; + } +out: + VOID_TEMP_FAILURE_RETRY(::close(fd)); + return r; +} + +int BlueStore::_read_bdev_label(CephContext* cct, string path, + bluestore_bdev_label_t *label) +{ + dout(10) << __func__ << dendl; + int fd = TEMP_FAILURE_RETRY(::open(path.c_str(), O_RDONLY|O_CLOEXEC)); + if (fd < 0) { + fd = -errno; + derr << __func__ << " failed to open " << path << ": " << cpp_strerror(fd) + << dendl; + return fd; + } + bufferlist bl; + int r = bl.read_fd(fd, BDEV_LABEL_BLOCK_SIZE); + VOID_TEMP_FAILURE_RETRY(::close(fd)); + if (r < 0) { + derr << __func__ << " failed to read from " << path + << ": " << cpp_strerror(r) << dendl; + return r; + } + + uint32_t crc, expected_crc; + auto p = bl.cbegin(); + try { + decode(*label, p); + bufferlist t; + t.substr_of(bl, 0, p.get_off()); + crc = t.crc32c(-1); + decode(expected_crc, p); + } + catch (ceph::buffer::error& e) { + dout(2) << __func__ << " unable to decode label at offset " << p.get_off() + << ": " << e.what() + << dendl; + return -ENOENT; + } + if (crc != expected_crc) { + derr << __func__ << " bad crc on label, expected " << expected_crc + << " != actual " << crc << dendl; + return -EIO; + } + dout(10) << __func__ << " got " << *label << dendl; + return 0; +} + +int BlueStore::_check_or_set_bdev_label( + string path, uint64_t size, string desc, bool create) +{ + bluestore_bdev_label_t label; + if (create) { + label.osd_uuid = fsid; + label.size = size; + label.btime = ceph_clock_now(); + label.description = desc; + int r = _write_bdev_label(cct, path, label); + if (r < 0) + return r; + } else { + int r = _read_bdev_label(cct, path, &label); + if (r < 0) + return r; + if (cct->_conf->bluestore_debug_permit_any_bdev_label) { + dout(20) << __func__ << " bdev " << path << " fsid " << label.osd_uuid + << " and fsid " << fsid << " check bypassed" << dendl; + } else if (label.osd_uuid != fsid) { + derr << __func__ << " bdev " << path << " fsid " << label.osd_uuid + << " does not match our fsid " << fsid << dendl; + return -EIO; + } + } + return 0; +} + +void BlueStore::_set_alloc_sizes(void) +{ + max_alloc_size = cct->_conf->bluestore_max_alloc_size; + + if (cct->_conf->bluestore_prefer_deferred_size) { + prefer_deferred_size = cct->_conf->bluestore_prefer_deferred_size; + } else { + ceph_assert(bdev); + if (_use_rotational_settings()) { + prefer_deferred_size = cct->_conf->bluestore_prefer_deferred_size_hdd; + } else { + prefer_deferred_size = cct->_conf->bluestore_prefer_deferred_size_ssd; + } + } + + if (cct->_conf->bluestore_deferred_batch_ops) { + deferred_batch_ops = cct->_conf->bluestore_deferred_batch_ops; + } else { + ceph_assert(bdev); + if (_use_rotational_settings()) { + deferred_batch_ops = cct->_conf->bluestore_deferred_batch_ops_hdd; + } else { + deferred_batch_ops = cct->_conf->bluestore_deferred_batch_ops_ssd; + } + } + + dout(10) << __func__ << " min_alloc_size 0x" << std::hex << min_alloc_size + << std::dec << " order " << (int)min_alloc_size_order + << " max_alloc_size 0x" << std::hex << max_alloc_size + << " prefer_deferred_size 0x" << prefer_deferred_size + << std::dec + << " deferred_batch_ops " << deferred_batch_ops + << dendl; +} + +int BlueStore::_open_bdev(bool create) +{ + ceph_assert(bdev == NULL); + string p = path + "/block"; + bdev = BlockDevice::create(cct, p, aio_cb, static_cast<void*>(this), discard_cb, static_cast<void*>(this)); + int r = bdev->open(p); + if (r < 0) + goto fail; + + if (create && cct->_conf->bdev_enable_discard) { + bdev->discard(0, bdev->get_size()); + } + + if (bdev->supported_bdev_label()) { + r = _check_or_set_bdev_label(p, bdev->get_size(), "main", create); + if (r < 0) + goto fail_close; + } + + // initialize global block parameters + block_size = bdev->get_block_size(); + block_mask = ~(block_size - 1); + block_size_order = ctz(block_size); + ceph_assert(block_size == 1u << block_size_order); + _set_max_defer_interval(); + // and set cache_size based on device type + r = _set_cache_sizes(); + if (r < 0) { + goto fail_close; + } + + if (bdev->is_smr()) { + freelist_type = "zoned"; + } + return 0; + + fail_close: + bdev->close(); + fail: + delete bdev; + bdev = NULL; + return r; +} + +void BlueStore::_validate_bdev() +{ + ceph_assert(bdev); + uint64_t dev_size = bdev->get_size(); + ceph_assert(dev_size > _get_ondisk_reserved()); +} + +void BlueStore::_close_bdev() +{ + ceph_assert(bdev); + bdev->close(); + delete bdev; + bdev = NULL; +} + +int BlueStore::_open_fm(KeyValueDB::Transaction t, bool read_only) +{ + int r; + + ceph_assert(fm == NULL); + fm = FreelistManager::create(cct, freelist_type, PREFIX_ALLOC); + ceph_assert(fm); + if (t) { + // create mode. initialize freespace + dout(20) << __func__ << " initializing freespace" << dendl; + { + bufferlist bl; + bl.append(freelist_type); + t->set(PREFIX_SUPER, "freelist_type", bl); + } + // being able to allocate in units less than bdev block size + // seems to be a bad idea. + ceph_assert( cct->_conf->bdev_block_size <= (int64_t)min_alloc_size); + + uint64_t alloc_size = min_alloc_size; + if (bdev->is_smr()) { + alloc_size = _zoned_piggyback_device_parameters_onto(alloc_size); + } + + fm->create(bdev->get_size(), alloc_size, t); + + // allocate superblock reserved space. note that we do not mark + // bluefs space as allocated in the freelist; we instead rely on + // bluefs doing that itself. + auto reserved = _get_ondisk_reserved(); + fm->allocate(0, reserved, t); + + if (cct->_conf->bluestore_debug_prefill > 0) { + uint64_t end = bdev->get_size() - reserved; + dout(1) << __func__ << " pre-fragmenting freespace, using " + << cct->_conf->bluestore_debug_prefill << " with max free extent " + << cct->_conf->bluestore_debug_prefragment_max << dendl; + uint64_t start = p2roundup(reserved, min_alloc_size); + uint64_t max_b = cct->_conf->bluestore_debug_prefragment_max / min_alloc_size; + float r = cct->_conf->bluestore_debug_prefill; + r /= 1.0 - r; + bool stop = false; + + while (!stop && start < end) { + uint64_t l = (rand() % max_b + 1) * min_alloc_size; + if (start + l > end) { + l = end - start; + l = p2align(l, min_alloc_size); + } + ceph_assert(start + l <= end); + + uint64_t u = 1 + (uint64_t)(r * (double)l); + u = p2roundup(u, min_alloc_size); + if (start + l + u > end) { + u = end - (start + l); + // trim to align so we don't overflow again + u = p2align(u, min_alloc_size); + stop = true; + } + ceph_assert(start + l + u <= end); + + dout(20) << __func__ << " free 0x" << std::hex << start << "~" << l + << " use 0x" << u << std::dec << dendl; + + if (u == 0) { + // break if u has been trimmed to nothing + break; + } + + fm->allocate(start + l, u, t); + start += l + u; + } + } + r = _write_out_fm_meta(0); + ceph_assert(r == 0); + } else { + r = fm->init(db, read_only, + [&](const std::string& key, std::string* result) { + return read_meta(key, result); + }); + if (r < 0) { + derr << __func__ << " freelist init failed: " << cpp_strerror(r) << dendl; + delete fm; + fm = NULL; + return r; + } + } + // if space size tracked by free list manager is that higher than actual + // dev size one can hit out-of-space allocation which will result + // in data loss and/or assertions + // Probably user altered the device size somehow. + // The only fix for now is to redeploy OSD. + if (fm->get_size() >= bdev->get_size() + min_alloc_size) { + ostringstream ss; + ss << "slow device size mismatch detected, " + << " fm size(" << fm->get_size() + << ") > slow device size(" << bdev->get_size() + << "), Please stop using this OSD as it might cause data loss."; + _set_disk_size_mismatch_alert(ss.str()); + } + return 0; +} + +void BlueStore::_close_fm() +{ + dout(10) << __func__ << dendl; + ceph_assert(fm); + fm->shutdown(); + delete fm; + fm = NULL; +} + +int BlueStore::_write_out_fm_meta(uint64_t target_size) +{ + int r = 0; + string p = path + "/block"; + + std::vector<std::pair<string, string>> fm_meta; + fm->get_meta(target_size, &fm_meta); + + for (auto& m : fm_meta) { + r = write_meta(m.first, m.second); + ceph_assert(r == 0); + } + return r; +} + +int BlueStore::_create_alloc() +{ + ceph_assert(shared_alloc.a == NULL); + ceph_assert(bdev->get_size()); + + uint64_t alloc_size = min_alloc_size; + if (bdev->is_smr()) { + int r = _zoned_check_config_settings(); + if (r < 0) + return r; + alloc_size = _zoned_piggyback_device_parameters_onto(alloc_size); + } + + shared_alloc.set(Allocator::create(cct, cct->_conf->bluestore_allocator, + bdev->get_size(), + alloc_size, "block")); + + if (!shared_alloc.a) { + lderr(cct) << __func__ << "Failed to create allocator:: " + << cct->_conf->bluestore_allocator + << dendl; + return -EINVAL; + } + return 0; +} + +int BlueStore::_init_alloc() +{ + int r = _create_alloc(); + if (r < 0) { + return r; + } + ceph_assert(shared_alloc.a != NULL); + + if (bdev->is_smr()) { + shared_alloc.a->zoned_set_zone_states(fm->get_zone_states(db)); + } + + uint64_t num = 0, bytes = 0; + + dout(1) << __func__ << " opening allocation metadata" << dendl; + // initialize from freelist + fm->enumerate_reset(); + uint64_t offset, length; + while (fm->enumerate_next(db, &offset, &length)) { + shared_alloc.a->init_add_free(offset, length); + ++num; + bytes += length; + } + fm->enumerate_reset(); + + dout(1) << __func__ + << " loaded " << byte_u_t(bytes) << " in " << num << " extents" + << std::hex + << ", allocator type " << shared_alloc.a->get_type() + << ", capacity 0x" << shared_alloc.a->get_capacity() + << ", block size 0x" << shared_alloc.a->get_block_size() + << ", free 0x" << shared_alloc.a->get_free() + << ", fragmentation " << shared_alloc.a->get_fragmentation() + << std::dec << dendl; + + return 0; +} + +void BlueStore::_close_alloc() +{ + ceph_assert(bdev); + bdev->discard_drain(); + + ceph_assert(shared_alloc.a); + shared_alloc.a->shutdown(); + delete shared_alloc.a; + shared_alloc.reset(); +} + +int BlueStore::_open_fsid(bool create) +{ + ceph_assert(fsid_fd < 0); + int flags = O_RDWR|O_CLOEXEC; + if (create) + flags |= O_CREAT; + fsid_fd = ::openat(path_fd, "fsid", flags, 0644); + if (fsid_fd < 0) { + int err = -errno; + derr << __func__ << " " << cpp_strerror(err) << dendl; + return err; + } + return 0; +} + +int BlueStore::_read_fsid(uuid_d *uuid) +{ + char fsid_str[40]; + memset(fsid_str, 0, sizeof(fsid_str)); + int ret = safe_read(fsid_fd, fsid_str, sizeof(fsid_str)); + if (ret < 0) { + derr << __func__ << " failed: " << cpp_strerror(ret) << dendl; + return ret; + } + if (ret > 36) + fsid_str[36] = 0; + else + fsid_str[ret] = 0; + if (!uuid->parse(fsid_str)) { + derr << __func__ << " unparsable uuid " << fsid_str << dendl; + return -EINVAL; + } + return 0; +} + +int BlueStore::_write_fsid() +{ + int r = ::ftruncate(fsid_fd, 0); + if (r < 0) { + r = -errno; + derr << __func__ << " fsid truncate failed: " << cpp_strerror(r) << dendl; + return r; + } + string str = stringify(fsid) + "\n"; + r = safe_write(fsid_fd, str.c_str(), str.length()); + if (r < 0) { + derr << __func__ << " fsid write failed: " << cpp_strerror(r) << dendl; + return r; + } + r = ::fsync(fsid_fd); + if (r < 0) { + r = -errno; + derr << __func__ << " fsid fsync failed: " << cpp_strerror(r) << dendl; + return r; + } + return 0; +} + +void BlueStore::_close_fsid() +{ + VOID_TEMP_FAILURE_RETRY(::close(fsid_fd)); + fsid_fd = -1; +} + +int BlueStore::_lock_fsid() +{ + struct flock l; + memset(&l, 0, sizeof(l)); + l.l_type = F_WRLCK; + l.l_whence = SEEK_SET; + int r = ::fcntl(fsid_fd, F_SETLK, &l); + if (r < 0) { + int err = errno; + derr << __func__ << " failed to lock " << path << "/fsid" + << " (is another ceph-osd still running?)" + << cpp_strerror(err) << dendl; + return -err; + } + return 0; +} + +bool BlueStore::is_rotational() +{ + if (bdev) { + return bdev->is_rotational(); + } + + bool rotational = true; + int r = _open_path(); + if (r < 0) + goto out; + r = _open_fsid(false); + if (r < 0) + goto out_path; + r = _read_fsid(&fsid); + if (r < 0) + goto out_fsid; + r = _lock_fsid(); + if (r < 0) + goto out_fsid; + r = _open_bdev(false); + if (r < 0) + goto out_fsid; + rotational = bdev->is_rotational(); + _close_bdev(); + out_fsid: + _close_fsid(); + out_path: + _close_path(); + out: + return rotational; +} + +bool BlueStore::is_journal_rotational() +{ + if (!bluefs) { + dout(5) << __func__ << " bluefs disabled, default to store media type" + << dendl; + return is_rotational(); + } + dout(10) << __func__ << " " << (int)bluefs->wal_is_rotational() << dendl; + return bluefs->wal_is_rotational(); +} + +bool BlueStore::_use_rotational_settings() +{ + if (cct->_conf->bluestore_debug_enforce_settings == "hdd") { + return true; + } + if (cct->_conf->bluestore_debug_enforce_settings == "ssd") { + return false; + } + return bdev->is_rotational(); +} + +bool BlueStore::test_mount_in_use() +{ + // most error conditions mean the mount is not in use (e.g., because + // it doesn't exist). only if we fail to lock do we conclude it is + // in use. + bool ret = false; + int r = _open_path(); + if (r < 0) + return false; + r = _open_fsid(false); + if (r < 0) + goto out_path; + r = _lock_fsid(); + if (r < 0) + ret = true; // if we can't lock, it is in use + _close_fsid(); + out_path: + _close_path(); + return ret; +} + +int BlueStore::_minimal_open_bluefs(bool create) +{ + int r; + bluefs = new BlueFS(cct); + + string bfn; + struct stat st; + + bfn = path + "/block.db"; + if (::stat(bfn.c_str(), &st) == 0) { + r = bluefs->add_block_device( + BlueFS::BDEV_DB, bfn, + create && cct->_conf->bdev_enable_discard, + SUPER_RESERVED); + if (r < 0) { + derr << __func__ << " add block device(" << bfn << ") returned: " + << cpp_strerror(r) << dendl; + goto free_bluefs; + } + + if (bluefs->bdev_support_label(BlueFS::BDEV_DB)) { + r = _check_or_set_bdev_label( + bfn, + bluefs->get_block_device_size(BlueFS::BDEV_DB), + "bluefs db", create); + if (r < 0) { + derr << __func__ + << " check block device(" << bfn << ") label returned: " + << cpp_strerror(r) << dendl; + goto free_bluefs; + } + } + bluefs_layout.shared_bdev = BlueFS::BDEV_SLOW; + bluefs_layout.dedicated_db = true; + } else { + r = -errno; + if (::lstat(bfn.c_str(), &st) == -1) { + r = 0; + bluefs_layout.shared_bdev = BlueFS::BDEV_DB; + } else { + derr << __func__ << " " << bfn << " symlink exists but target unusable: " + << cpp_strerror(r) << dendl; + goto free_bluefs; + } + } + + // shared device + bfn = path + "/block"; + // never trim here + r = bluefs->add_block_device(bluefs_layout.shared_bdev, bfn, false, + 0, // no need to provide valid 'reserved' for shared dev + &shared_alloc); + if (r < 0) { + derr << __func__ << " add block device(" << bfn << ") returned: " + << cpp_strerror(r) << dendl; + goto free_bluefs; + } + + bfn = path + "/block.wal"; + if (::stat(bfn.c_str(), &st) == 0) { + r = bluefs->add_block_device(BlueFS::BDEV_WAL, bfn, + create && cct->_conf->bdev_enable_discard, + BDEV_LABEL_BLOCK_SIZE); + if (r < 0) { + derr << __func__ << " add block device(" << bfn << ") returned: " + << cpp_strerror(r) << dendl; + goto free_bluefs; + } + + if (bluefs->bdev_support_label(BlueFS::BDEV_WAL)) { + r = _check_or_set_bdev_label( + bfn, + bluefs->get_block_device_size(BlueFS::BDEV_WAL), + "bluefs wal", create); + if (r < 0) { + derr << __func__ << " check block device(" << bfn + << ") label returned: " << cpp_strerror(r) << dendl; + goto free_bluefs; + } + } + + bluefs_layout.dedicated_wal = true; + } else { + r = 0; + if (::lstat(bfn.c_str(), &st) != -1) { + r = -errno; + derr << __func__ << " " << bfn << " symlink exists but target unusable: " + << cpp_strerror(r) << dendl; + goto free_bluefs; + } + } + return 0; + +free_bluefs: + ceph_assert(bluefs); + delete bluefs; + bluefs = NULL; + return r; +} + +int BlueStore::_open_bluefs(bool create, bool read_only) +{ + int r = _minimal_open_bluefs(create); + if (r < 0) { + return r; + } + BlueFSVolumeSelector* vselector = nullptr; + if (bluefs_layout.shared_bdev == BlueFS::BDEV_SLOW) { + + string options = cct->_conf->bluestore_rocksdb_options; + string options_annex = cct->_conf->bluestore_rocksdb_options_annex; + if (!options_annex.empty()) { + if (!options.empty() && + *options.rbegin() != ',') { + options += ','; + } + options += options_annex; + } + + rocksdb::Options rocks_opts; + r = RocksDBStore::ParseOptionsFromStringStatic( + cct, + options, + rocks_opts, + nullptr); + if (r < 0) { + return r; + } + if (cct->_conf->bluestore_volume_selection_policy == "fit_to_fast") { + vselector = new FitToFastVolumeSelector( + bluefs->get_block_device_size(BlueFS::BDEV_WAL) * 95 / 100, + bluefs->get_block_device_size(BlueFS::BDEV_DB) * 95 / 100, + bluefs->get_block_device_size(BlueFS::BDEV_SLOW) * 95 / 100); + } else { + double reserved_factor = cct->_conf->bluestore_volume_selection_reserved_factor; + vselector = + new RocksDBBlueFSVolumeSelector( + bluefs->get_block_device_size(BlueFS::BDEV_WAL) * 95 / 100, + bluefs->get_block_device_size(BlueFS::BDEV_DB) * 95 / 100, + bluefs->get_block_device_size(BlueFS::BDEV_SLOW) * 95 / 100, + 1024 * 1024 * 1024, //FIXME: set expected l0 size here + rocks_opts.max_bytes_for_level_base, + rocks_opts.max_bytes_for_level_multiplier, + reserved_factor, + cct->_conf->bluestore_volume_selection_reserved, + cct->_conf->bluestore_volume_selection_policy == "use_some_extra"); + } + } + if (create) { + bluefs->mkfs(fsid, bluefs_layout); + } + bluefs->set_volume_selector(vselector); + r = bluefs->mount(); + if (r < 0) { + derr << __func__ << " failed bluefs mount: " << cpp_strerror(r) << dendl; + } + ceph_assert_always(bluefs->maybe_verify_layout(bluefs_layout) == 0); + return r; +} + +void BlueStore::_close_bluefs(bool cold_close) +{ + bluefs->umount(cold_close); + _minimal_close_bluefs(); +} + +void BlueStore::_minimal_close_bluefs() +{ + delete bluefs; + bluefs = NULL; +} + +int BlueStore::_is_bluefs(bool create, bool* ret) +{ + if (create) { + *ret = cct->_conf->bluestore_bluefs; + } else { + string s; + int r = read_meta("bluefs", &s); + if (r < 0) { + derr << __func__ << " unable to read 'bluefs' meta" << dendl; + return -EIO; + } + if (s == "1") { + *ret = true; + } else if (s == "0") { + *ret = false; + } else { + derr << __func__ << " bluefs = " << s << " : not 0 or 1, aborting" + << dendl; + return -EIO; + } + } + return 0; +} + +/* +* opens both DB and dependant super_meta, FreelistManager and allocator +* in the proper order +*/ +int BlueStore::_open_db_and_around(bool read_only, bool to_repair) +{ + dout(0) << __func__ << " read-only:" << read_only + << " repair:" << to_repair << dendl; + { + string type; + int r = read_meta("type", &type); + if (r < 0) { + derr << __func__ << " failed to load os-type: " << cpp_strerror(r) + << dendl; + return r; + } + + if (type != "bluestore") { + derr << __func__ << " expected bluestore, but type is " << type << dendl; + return -EIO; + } + } + + int r = _open_path(); + if (r < 0) + return r; + r = _open_fsid(false); + if (r < 0) + goto out_path; + + r = _read_fsid(&fsid); + if (r < 0) + goto out_fsid; + + r = _lock_fsid(); + if (r < 0) + goto out_fsid; + + r = _open_bdev(false); + if (r < 0) + goto out_fsid; + + // open in read-only first to read FM list and init allocator + // as they might be needed for some BlueFS procedures + r = _open_db(false, false, true); + if (r < 0) + goto out_bdev; + + r = _open_super_meta(); + if (r < 0) { + goto out_db; + } + + r = _open_fm(nullptr, true); + if (r < 0) + goto out_db; + + r = _init_alloc(); + if (r < 0) + goto out_fm; + + // Re-open in the proper mode(s). + + // Can't simply bypass second open for read-only mode as we need to + // load allocated extents from bluefs into allocator. + // And now it's time to do that + // + _close_db(true); + + r = _open_db(false, to_repair, read_only); + if (r < 0) { + goto out_alloc; + } + return 0; + +out_alloc: + _close_alloc(); +out_fm: + _close_fm(); + out_db: + _close_db(read_only); + out_bdev: + _close_bdev(); + out_fsid: + _close_fsid(); + out_path: + _close_path(); + return r; +} + +void BlueStore::_close_db_and_around(bool read_only) +{ + _close_db(read_only); + _close_fm(); + _close_alloc(); + _close_bdev(); + _close_fsid(); + _close_path(); +} + +int BlueStore::open_db_environment(KeyValueDB **pdb, bool to_repair) +{ + _kv_only = true; + int r = _open_db_and_around(false, to_repair); + if (r == 0) { + *pdb = db; + } else { + *pdb = nullptr; + } + return r; +} + +int BlueStore::close_db_environment() +{ + _close_db_and_around(false); + return 0; +} + +/* gets access to bluefs supporting RocksDB */ +BlueFS* BlueStore::get_bluefs() { + return bluefs; +} + +int BlueStore::_prepare_db_environment(bool create, bool read_only, + std::string* _fn, std::string* _kv_backend) +{ + int r; + ceph_assert(!db); + std::string& fn=*_fn; + std::string& kv_backend=*_kv_backend; + fn = path + "/db"; + std::shared_ptr<Int64ArrayMergeOperator> merge_op(new Int64ArrayMergeOperator); + + if (create) { + kv_backend = cct->_conf->bluestore_kvbackend; + } else { + r = read_meta("kv_backend", &kv_backend); + if (r < 0) { + derr << __func__ << " unable to read 'kv_backend' meta" << dendl; + return -EIO; + } + } + dout(10) << __func__ << " kv_backend = " << kv_backend << dendl; + + bool do_bluefs; + r = _is_bluefs(create, &do_bluefs); + if (r < 0) { + return r; + } + dout(10) << __func__ << " do_bluefs = " << do_bluefs << dendl; + + map<string,string> kv_options; + // force separate wal dir for all new deployments. + kv_options["separate_wal_dir"] = 1; + rocksdb::Env *env = NULL; + if (do_bluefs) { + dout(10) << __func__ << " initializing bluefs" << dendl; + if (kv_backend != "rocksdb") { + derr << " backend must be rocksdb to use bluefs" << dendl; + return -EINVAL; + } + + r = _open_bluefs(create, read_only); + if (r < 0) { + return r; + } + + if (cct->_conf->bluestore_bluefs_env_mirror) { + rocksdb::Env* a = new BlueRocksEnv(bluefs); + rocksdb::Env* b = rocksdb::Env::Default(); + if (create) { + string cmd = "rm -rf " + path + "/db " + + path + "/db.slow " + + path + "/db.wal"; + int r = system(cmd.c_str()); + (void)r; + } + env = new rocksdb::EnvMirror(b, a, false, true); + } else { + env = new BlueRocksEnv(bluefs); + + // simplify the dir names, too, as "seen" by rocksdb + fn = "db"; + } + BlueFSVolumeSelector::paths paths; + bluefs->get_vselector_paths(fn, paths); + + { + ostringstream db_paths; + bool first = true; + for (auto& p : paths) { + if (!first) { + db_paths << " "; + } + first = false; + db_paths << p.first << "," << p.second; + + } + kv_options["db_paths"] = db_paths.str(); + dout(1) << __func__ << " set db_paths to " << db_paths.str() << dendl; + } + + if (create) { + for (auto& p : paths) { + env->CreateDir(p.first); + } + // Selectors don't provide wal path so far hence create explicitly + env->CreateDir(fn + ".wal"); + } else { + std::vector<std::string> res; + // check for dir presence + auto r = env->GetChildren(fn+".wal", &res); + if (r.IsNotFound()) { + kv_options.erase("separate_wal_dir"); + } + } + } else { + string walfn = path + "/db.wal"; + + if (create) { + int r = ::mkdir(fn.c_str(), 0755); + if (r < 0) + r = -errno; + if (r < 0 && r != -EEXIST) { + derr << __func__ << " failed to create " << fn << ": " << cpp_strerror(r) + << dendl; + return r; + } + + // wal_dir, too! + r = ::mkdir(walfn.c_str(), 0755); + if (r < 0) + r = -errno; + if (r < 0 && r != -EEXIST) { + derr << __func__ << " failed to create " << walfn + << ": " << cpp_strerror(r) + << dendl; + return r; + } + } else { + struct stat st; + r = ::stat(walfn.c_str(), &st); + if (r < 0 && errno == ENOENT) { + kv_options.erase("separate_wal_dir"); + } + } + } + + + db = KeyValueDB::create(cct, + kv_backend, + fn, + kv_options, + static_cast<void*>(env)); + if (!db) { + derr << __func__ << " error creating db" << dendl; + if (bluefs) { + _close_bluefs(read_only); + } + // delete env manually here since we can't depend on db to do this + // under this case + delete env; + env = NULL; + return -EIO; + } + + FreelistManager::setup_merge_operators(db, freelist_type); + db->set_merge_operator(PREFIX_STAT, merge_op); + db->set_cache_size(cache_kv_ratio * cache_size); + return 0; +} + +int BlueStore::_open_db(bool create, bool to_repair_db, bool read_only) +{ + int r; + ceph_assert(!(create && read_only)); + string options; + string options_annex; + stringstream err; + string kv_dir_fn; + string kv_backend; + std::string sharding_def; + r = _prepare_db_environment(create, read_only, &kv_dir_fn, &kv_backend); + if (r < 0) { + derr << __func__ << " failed to prepare db environment: " << err.str() << dendl; + return -EIO; + } + if (kv_backend == "rocksdb") { + options = cct->_conf->bluestore_rocksdb_options; + options_annex = cct->_conf->bluestore_rocksdb_options_annex; + if (!options_annex.empty()) { + if (!options.empty() && + *options.rbegin() != ',') { + options += ','; + } + options += options_annex; + } + + if (cct->_conf.get_val<bool>("bluestore_rocksdb_cf")) { + sharding_def = cct->_conf.get_val<std::string>("bluestore_rocksdb_cfs"); + } + } + + db->init(options); + if (to_repair_db) + return 0; + if (create) { + r = db->create_and_open(err, sharding_def); + } else { + // we pass in cf list here, but it is only used if the db already has + // column families created. + r = read_only ? + db->open_read_only(err, sharding_def) : + db->open(err, sharding_def); + } + if (r) { + derr << __func__ << " erroring opening db: " << err.str() << dendl; + _close_db(read_only); + return -EIO; + } + dout(1) << __func__ << " opened " << kv_backend + << " path " << kv_dir_fn << " options " << options << dendl; + return 0; +} + +void BlueStore::_close_db(bool cold_close) +{ + ceph_assert(db); + delete db; + db = NULL; + if (bluefs) { + _close_bluefs(cold_close); + } +} + +void BlueStore::_dump_alloc_on_failure() +{ + auto dump_interval = + cct->_conf->bluestore_bluefs_alloc_failure_dump_interval; + if (dump_interval > 0 && + next_dump_on_bluefs_alloc_failure <= ceph_clock_now()) { + shared_alloc.a->dump(); + next_dump_on_bluefs_alloc_failure = ceph_clock_now(); + next_dump_on_bluefs_alloc_failure += dump_interval; + } +} + +int BlueStore::_open_collections() +{ + dout(10) << __func__ << dendl; + collections_had_errors = false; + ceph_assert(coll_map.empty()); + KeyValueDB::Iterator it = db->get_iterator(PREFIX_COLL); + for (it->upper_bound(string()); + it->valid(); + it->next()) { + coll_t cid; + if (cid.parse(it->key())) { + auto c = ceph::make_ref<Collection>( + this, + onode_cache_shards[cid.hash_to_shard(onode_cache_shards.size())], + buffer_cache_shards[cid.hash_to_shard(buffer_cache_shards.size())], + cid); + bufferlist bl = it->value(); + auto p = bl.cbegin(); + try { + decode(c->cnode, p); + } catch (ceph::buffer::error& e) { + derr << __func__ << " failed to decode cnode, key:" + << pretty_binary_string(it->key()) << dendl; + return -EIO; + } + dout(20) << __func__ << " opened " << cid << " " << c + << " " << c->cnode << dendl; + _osr_attach(c.get()); + coll_map[cid] = c; + + } else { + derr << __func__ << " unrecognized collection " << it->key() << dendl; + collections_had_errors = true; + } + } + return 0; +} + +void BlueStore::_fsck_collections(int64_t* errors) +{ + if (collections_had_errors) { + dout(10) << __func__ << dendl; + KeyValueDB::Iterator it = db->get_iterator(PREFIX_COLL, KeyValueDB::ITERATOR_NOCACHE); + for (it->upper_bound(string()); + it->valid(); + it->next()) { + coll_t cid; + if (!cid.parse(it->key())) { + derr << __func__ << " unrecognized collection " << it->key() << dendl; + if (errors) { + (*errors)++; + } + } + } + } +} + +void BlueStore::_set_per_pool_omap() +{ + per_pool_omap = OMAP_BULK; + bufferlist bl; + db->get(PREFIX_SUPER, "per_pool_omap", &bl); + if (bl.length()) { + auto s = bl.to_str(); + if (s == stringify(OMAP_PER_POOL)) { + per_pool_omap = OMAP_PER_POOL; + } else if (s == stringify(OMAP_PER_PG)) { + per_pool_omap = OMAP_PER_PG; + } else { + ceph_assert(s == stringify(OMAP_BULK)); + } + dout(10) << __func__ << " per_pool_omap = " << per_pool_omap << dendl; + } else { + dout(10) << __func__ << " per_pool_omap not present" << dendl; + } + _check_no_per_pg_or_pool_omap_alert(); +} + +void BlueStore::_open_statfs() +{ + osd_pools.clear(); + vstatfs.reset(); + + bufferlist bl; + int r = db->get(PREFIX_STAT, BLUESTORE_GLOBAL_STATFS_KEY, &bl); + if (r >= 0) { + per_pool_stat_collection = false; + if (size_t(bl.length()) >= sizeof(vstatfs.values)) { + auto it = bl.cbegin(); + vstatfs.decode(it); + dout(10) << __func__ << " store_statfs is found" << dendl; + } else { + dout(10) << __func__ << " store_statfs is corrupt, using empty" << dendl; + } + _check_legacy_statfs_alert(); + } else { + per_pool_stat_collection = true; + dout(10) << __func__ << " per-pool statfs is enabled" << dendl; + KeyValueDB::Iterator it = db->get_iterator(PREFIX_STAT, KeyValueDB::ITERATOR_NOCACHE); + for (it->upper_bound(string()); + it->valid(); + it->next()) { + + uint64_t pool_id; + int r = get_key_pool_stat(it->key(), &pool_id); + ceph_assert(r == 0); + + bufferlist bl; + bl = it->value(); + auto p = bl.cbegin(); + auto& st = osd_pools[pool_id]; + try { + st.decode(p); + vstatfs += st; + + dout(30) << __func__ << " pool " << pool_id + << " statfs " << st << dendl; + } catch (ceph::buffer::error& e) { + derr << __func__ << " failed to decode pool stats, key:" + << pretty_binary_string(it->key()) << dendl; + } + } + } + dout(30) << __func__ << " statfs " << vstatfs << dendl; + +} + +int BlueStore::_setup_block_symlink_or_file( + string name, + string epath, + uint64_t size, + bool create) +{ + dout(20) << __func__ << " name " << name << " path " << epath + << " size " << size << " create=" << (int)create << dendl; + int r = 0; + int flags = O_RDWR|O_CLOEXEC; + if (create) + flags |= O_CREAT; + if (epath.length()) { + r = ::symlinkat(epath.c_str(), path_fd, name.c_str()); + if (r < 0) { + r = -errno; + derr << __func__ << " failed to create " << name << " symlink to " + << epath << ": " << cpp_strerror(r) << dendl; + return r; + } + + if (!epath.compare(0, strlen(SPDK_PREFIX), SPDK_PREFIX)) { + int fd = ::openat(path_fd, epath.c_str(), flags, 0644); + if (fd < 0) { + r = -errno; + derr << __func__ << " failed to open " << epath << " file: " + << cpp_strerror(r) << dendl; + return r; + } + // write the Transport ID of the NVMe device + // a transport id looks like: "trtype:PCIe traddr:0000:02:00.0" + // where "0000:02:00.0" is the selector of a PCI device, see + // the first column of "lspci -mm -n -D" + string trid{"trtype:PCIe "}; + trid += "traddr:"; + trid += epath.substr(strlen(SPDK_PREFIX)); + r = ::write(fd, trid.c_str(), trid.size()); + ceph_assert(r == static_cast<int>(trid.size())); + dout(1) << __func__ << " created " << name << " symlink to " + << epath << dendl; + VOID_TEMP_FAILURE_RETRY(::close(fd)); + } + } + if (size) { + int fd = ::openat(path_fd, name.c_str(), flags, 0644); + if (fd >= 0) { + // block file is present + struct stat st; + int r = ::fstat(fd, &st); + if (r == 0 && + S_ISREG(st.st_mode) && // if it is a regular file + st.st_size == 0) { // and is 0 bytes + r = ::ftruncate(fd, size); + if (r < 0) { + r = -errno; + derr << __func__ << " failed to resize " << name << " file to " + << size << ": " << cpp_strerror(r) << dendl; + VOID_TEMP_FAILURE_RETRY(::close(fd)); + return r; + } + + if (cct->_conf->bluestore_block_preallocate_file) { + r = ::ceph_posix_fallocate(fd, 0, size); + if (r > 0) { + derr << __func__ << " failed to prefallocate " << name << " file to " + << size << ": " << cpp_strerror(r) << dendl; + VOID_TEMP_FAILURE_RETRY(::close(fd)); + return -r; + } + } + dout(1) << __func__ << " resized " << name << " file to " + << byte_u_t(size) << dendl; + } + VOID_TEMP_FAILURE_RETRY(::close(fd)); + } else { + int r = -errno; + if (r != -ENOENT) { + derr << __func__ << " failed to open " << name << " file: " + << cpp_strerror(r) << dendl; + return r; + } + } + } + return 0; +} + +int BlueStore::mkfs() +{ + dout(1) << __func__ << " path " << path << dendl; + int r; + uuid_d old_fsid; + uint64_t reserved; + if (cct->_conf->osd_max_object_size > OBJECT_MAX_SIZE) { + derr << __func__ << " osd_max_object_size " + << cct->_conf->osd_max_object_size << " > bluestore max " + << OBJECT_MAX_SIZE << dendl; + return -EINVAL; + } + + { + string done; + r = read_meta("mkfs_done", &done); + if (r == 0) { + dout(1) << __func__ << " already created" << dendl; + if (cct->_conf->bluestore_fsck_on_mkfs) { + r = fsck(cct->_conf->bluestore_fsck_on_mkfs_deep); + if (r < 0) { + derr << __func__ << " fsck found fatal error: " << cpp_strerror(r) + << dendl; + return r; + } + if (r > 0) { + derr << __func__ << " fsck found " << r << " errors" << dendl; + r = -EIO; + } + } + return r; // idempotent + } + } + + { + string type; + r = read_meta("type", &type); + if (r == 0) { + if (type != "bluestore") { + derr << __func__ << " expected bluestore, but type is " << type << dendl; + return -EIO; + } + } else { + r = write_meta("type", "bluestore"); + if (r < 0) + return r; + } + } + + freelist_type = "bitmap"; + + r = _open_path(); + if (r < 0) + return r; + + r = _open_fsid(true); + if (r < 0) + goto out_path_fd; + + r = _lock_fsid(); + if (r < 0) + goto out_close_fsid; + + r = _read_fsid(&old_fsid); + if (r < 0 || old_fsid.is_zero()) { + if (fsid.is_zero()) { + fsid.generate_random(); + dout(1) << __func__ << " generated fsid " << fsid << dendl; + } else { + dout(1) << __func__ << " using provided fsid " << fsid << dendl; + } + // we'll write it later. + } else { + if (!fsid.is_zero() && fsid != old_fsid) { + derr << __func__ << " on-disk fsid " << old_fsid + << " != provided " << fsid << dendl; + r = -EINVAL; + goto out_close_fsid; + } + fsid = old_fsid; + } + + r = _setup_block_symlink_or_file("block", cct->_conf->bluestore_block_path, + cct->_conf->bluestore_block_size, + cct->_conf->bluestore_block_create); + if (r < 0) + goto out_close_fsid; + if (cct->_conf->bluestore_bluefs) { + r = _setup_block_symlink_or_file("block.wal", cct->_conf->bluestore_block_wal_path, + cct->_conf->bluestore_block_wal_size, + cct->_conf->bluestore_block_wal_create); + if (r < 0) + goto out_close_fsid; + r = _setup_block_symlink_or_file("block.db", cct->_conf->bluestore_block_db_path, + cct->_conf->bluestore_block_db_size, + cct->_conf->bluestore_block_db_create); + if (r < 0) + goto out_close_fsid; + } + + r = _open_bdev(true); + if (r < 0) + goto out_close_fsid; + + // choose min_alloc_size + if (cct->_conf->bluestore_min_alloc_size) { + min_alloc_size = cct->_conf->bluestore_min_alloc_size; + } else { + ceph_assert(bdev); + if (_use_rotational_settings()) { + min_alloc_size = cct->_conf->bluestore_min_alloc_size_hdd; + } else { + min_alloc_size = cct->_conf->bluestore_min_alloc_size_ssd; + } + } + _validate_bdev(); + + // make sure min_alloc_size is power of 2 aligned. + if (!isp2(min_alloc_size)) { + derr << __func__ << " min_alloc_size 0x" + << std::hex << min_alloc_size << std::dec + << " is not power of 2 aligned!" + << dendl; + r = -EINVAL; + goto out_close_bdev; + } + + r = _create_alloc(); + if (r < 0) { + goto out_close_bdev; + } + + reserved = _get_ondisk_reserved(); + shared_alloc.a->init_add_free(reserved, + p2align(bdev->get_size(), min_alloc_size) - reserved); + + r = _open_db(true); + if (r < 0) + goto out_close_alloc; + + { + KeyValueDB::Transaction t = db->get_transaction(); + r = _open_fm(t, true); + if (r < 0) + goto out_close_db; + { + bufferlist bl; + encode((uint64_t)0, bl); + t->set(PREFIX_SUPER, "nid_max", bl); + t->set(PREFIX_SUPER, "blobid_max", bl); + } + + { + bufferlist bl; + encode((uint64_t)min_alloc_size, bl); + t->set(PREFIX_SUPER, "min_alloc_size", bl); + } + { + bufferlist bl; + if (cct->_conf.get_val<bool>("bluestore_debug_legacy_omap")) { + bl.append(stringify(OMAP_BULK)); + } else { + bl.append(stringify(OMAP_PER_PG)); + } + t->set(PREFIX_SUPER, "per_pool_omap", bl); + } + ondisk_format = latest_ondisk_format; + _prepare_ondisk_format_super(t); + db->submit_transaction_sync(t); + } + + r = write_meta("kv_backend", cct->_conf->bluestore_kvbackend); + if (r < 0) + goto out_close_fm; + + r = write_meta("bluefs", stringify(bluefs ? 1 : 0)); + if (r < 0) + goto out_close_fm; + + if (fsid != old_fsid) { + r = _write_fsid(); + if (r < 0) { + derr << __func__ << " error writing fsid: " << cpp_strerror(r) << dendl; + goto out_close_fm; + } + } + + out_close_fm: + _close_fm(); + out_close_db: + _close_db(false); + out_close_alloc: + _close_alloc(); + out_close_bdev: + _close_bdev(); + out_close_fsid: + _close_fsid(); + out_path_fd: + _close_path(); + + if (r == 0 && + cct->_conf->bluestore_fsck_on_mkfs) { + int rc = fsck(cct->_conf->bluestore_fsck_on_mkfs_deep); + if (rc < 0) + return rc; + if (rc > 0) { + derr << __func__ << " fsck found " << rc << " errors" << dendl; + r = -EIO; + } + } + + if (r == 0) { + // indicate success by writing the 'mkfs_done' file + r = write_meta("mkfs_done", "yes"); + } + + if (r < 0) { + derr << __func__ << " failed, " << cpp_strerror(r) << dendl; + } else { + dout(0) << __func__ << " success" << dendl; + } + return r; +} + +int BlueStore::add_new_bluefs_device(int id, const string& dev_path) +{ + dout(10) << __func__ << " path " << dev_path << " id:" << id << dendl; + int r; + ceph_assert(path_fd < 0); + + ceph_assert(id == BlueFS::BDEV_NEWWAL || id == BlueFS::BDEV_NEWDB); + + if (!cct->_conf->bluestore_bluefs) { + derr << __func__ << " bluefs isn't configured, can't add new device " << dendl; + return -EIO; + } + + r = _open_db_and_around(true); + + if (id == BlueFS::BDEV_NEWWAL) { + string p = path + "/block.wal"; + r = _setup_block_symlink_or_file("block.wal", dev_path, + cct->_conf->bluestore_block_wal_size, + true); + ceph_assert(r == 0); + + r = bluefs->add_block_device(BlueFS::BDEV_NEWWAL, p, + cct->_conf->bdev_enable_discard, + BDEV_LABEL_BLOCK_SIZE); + ceph_assert(r == 0); + + if (bluefs->bdev_support_label(BlueFS::BDEV_NEWWAL)) { + r = _check_or_set_bdev_label( + p, + bluefs->get_block_device_size(BlueFS::BDEV_NEWWAL), + "bluefs wal", + true); + ceph_assert(r == 0); + } + + bluefs_layout.dedicated_wal = true; + } else if (id == BlueFS::BDEV_NEWDB) { + string p = path + "/block.db"; + r = _setup_block_symlink_or_file("block.db", dev_path, + cct->_conf->bluestore_block_db_size, + true); + ceph_assert(r == 0); + + r = bluefs->add_block_device(BlueFS::BDEV_NEWDB, p, + cct->_conf->bdev_enable_discard, + SUPER_RESERVED); + ceph_assert(r == 0); + + if (bluefs->bdev_support_label(BlueFS::BDEV_NEWDB)) { + r = _check_or_set_bdev_label( + p, + bluefs->get_block_device_size(BlueFS::BDEV_NEWDB), + "bluefs db", + true); + ceph_assert(r == 0); + } + bluefs_layout.shared_bdev = BlueFS::BDEV_SLOW; + bluefs_layout.dedicated_db = true; + } + + bluefs->umount(); + bluefs->mount(); + + r = bluefs->prepare_new_device(id, bluefs_layout); + ceph_assert(r == 0); + + if (r < 0) { + derr << __func__ << " failed, " << cpp_strerror(r) << dendl; + } else { + dout(0) << __func__ << " success" << dendl; + } + + _close_db_and_around(true); + return r; +} + +int BlueStore::migrate_to_existing_bluefs_device(const set<int>& devs_source, + int id) +{ + dout(10) << __func__ << " id:" << id << dendl; + ceph_assert(path_fd < 0); + + ceph_assert(id == BlueFS::BDEV_SLOW || id == BlueFS::BDEV_DB); + + if (!cct->_conf->bluestore_bluefs) { + derr << __func__ << " bluefs isn't configured, can't add new device " << dendl; + return -EIO; + } + + int r = _open_db_and_around(true); + + uint64_t used_space = 0; + for(auto src_id : devs_source) { + used_space += bluefs->get_used(src_id); + } + uint64_t target_free = bluefs->get_free(id); + if (target_free < used_space) { + derr << __func__ + << " can't migrate, free space at target: " << target_free + << " is less than required space: " << used_space + << dendl; + r = -ENOSPC; + goto shutdown; + } + if (devs_source.count(BlueFS::BDEV_DB)) { + bluefs_layout.shared_bdev = BlueFS::BDEV_DB; + bluefs_layout.dedicated_db = false; + } + if (devs_source.count(BlueFS::BDEV_WAL)) { + bluefs_layout.dedicated_wal = false; + } + r = bluefs->device_migrate_to_existing(cct, devs_source, id, bluefs_layout); + if (r < 0) { + derr << __func__ << " failed during BlueFS migration, " << cpp_strerror(r) << dendl; + goto shutdown; + } + + if (devs_source.count(BlueFS::BDEV_DB)) { + r = unlink(string(path + "/block.db").c_str()); + ceph_assert(r == 0); + } + if (devs_source.count(BlueFS::BDEV_WAL)) { + r = unlink(string(path + "/block.wal").c_str()); + ceph_assert(r == 0); + } + +shutdown: + _close_db_and_around(true); + return r; +} + +int BlueStore::migrate_to_new_bluefs_device(const set<int>& devs_source, + int id, + const string& dev_path) +{ + dout(10) << __func__ << " path " << dev_path << " id:" << id << dendl; + int r; + ceph_assert(path_fd < 0); + + ceph_assert(id == BlueFS::BDEV_NEWWAL || id == BlueFS::BDEV_NEWDB); + + if (!cct->_conf->bluestore_bluefs) { + derr << __func__ << " bluefs isn't configured, can't add new device " << dendl; + return -EIO; + } + + r = _open_db_and_around(true); + + string link_db; + string link_wal; + if (devs_source.count(BlueFS::BDEV_DB) && + bluefs_layout.shared_bdev != BlueFS::BDEV_DB) { + link_db = path + "/block.db"; + bluefs_layout.shared_bdev = BlueFS::BDEV_DB; + bluefs_layout.dedicated_db = false; + } + if (devs_source.count(BlueFS::BDEV_WAL)) { + link_wal = path + "/block.wal"; + bluefs_layout.dedicated_wal = false; + } + + size_t target_size; + string target_name; + if (id == BlueFS::BDEV_NEWWAL) { + target_name = "block.wal"; + target_size = cct->_conf->bluestore_block_wal_size; + bluefs_layout.dedicated_wal = true; + + r = bluefs->add_block_device(BlueFS::BDEV_NEWWAL, dev_path, + cct->_conf->bdev_enable_discard, + BDEV_LABEL_BLOCK_SIZE); + ceph_assert(r == 0); + + if (bluefs->bdev_support_label(BlueFS::BDEV_NEWWAL)) { + r = _check_or_set_bdev_label( + dev_path, + bluefs->get_block_device_size(BlueFS::BDEV_NEWWAL), + "bluefs wal", + true); + ceph_assert(r == 0); + } + } else if (id == BlueFS::BDEV_NEWDB) { + target_name = "block.db"; + target_size = cct->_conf->bluestore_block_db_size; + bluefs_layout.shared_bdev = BlueFS::BDEV_SLOW; + bluefs_layout.dedicated_db = true; + + r = bluefs->add_block_device(BlueFS::BDEV_NEWDB, dev_path, + cct->_conf->bdev_enable_discard, + SUPER_RESERVED); + ceph_assert(r == 0); + + if (bluefs->bdev_support_label(BlueFS::BDEV_NEWDB)) { + r = _check_or_set_bdev_label( + dev_path, + bluefs->get_block_device_size(BlueFS::BDEV_NEWDB), + "bluefs db", + true); + ceph_assert(r == 0); + } + } + + bluefs->umount(); + bluefs->mount(); + + r = bluefs->device_migrate_to_new(cct, devs_source, id, bluefs_layout); + + if (r < 0) { + derr << __func__ << " failed during BlueFS migration, " << cpp_strerror(r) << dendl; + goto shutdown; + } + + if (!link_db.empty()) { + r = unlink(link_db.c_str()); + ceph_assert(r == 0); + } + if (!link_wal.empty()) { + r = unlink(link_wal.c_str()); + ceph_assert(r == 0); + } + r = _setup_block_symlink_or_file( + target_name, + dev_path, + target_size, + true); + ceph_assert(r == 0); + dout(0) << __func__ << " success" << dendl; + +shutdown: + _close_db_and_around(true); + + return r; +} + +string BlueStore::get_device_path(unsigned id) +{ + string res; + if (id < BlueFS::MAX_BDEV) { + switch (id) { + case BlueFS::BDEV_WAL: + res = path + "/block.wal"; + break; + case BlueFS::BDEV_DB: + if (id == bluefs_layout.shared_bdev) { + res = path + "/block"; + } else { + res = path + "/block.db"; + } + break; + case BlueFS::BDEV_SLOW: + res = path + "/block"; + break; + } + } + return res; +} + +int BlueStore::_set_bdev_label_size(const string& path, uint64_t size) +{ + bluestore_bdev_label_t label; + int r = _read_bdev_label(cct, path, &label); + if (r < 0) { + derr << "unable to read label for " << path << ": " + << cpp_strerror(r) << dendl; + } else { + label.size = size; + r = _write_bdev_label(cct, path, label); + if (r < 0) { + derr << "unable to write label for " << path << ": " + << cpp_strerror(r) << dendl; + } + } + return r; +} + +int BlueStore::expand_devices(ostream& out) +{ + int r = _open_db_and_around(true); + ceph_assert(r == 0); + bluefs->dump_block_extents(out); + out << "Expanding DB/WAL..." << std::endl; + for (auto devid : { BlueFS::BDEV_WAL, BlueFS::BDEV_DB}) { + if (devid == bluefs_layout.shared_bdev ) { + continue; + } + uint64_t size = bluefs->get_block_device_size(devid); + if (size == 0) { + // no bdev + continue; + } + + out << devid + <<" : expanding " << " to 0x" << size << std::dec << std::endl; + string p = get_device_path(devid); + const char* path = p.c_str(); + if (path == nullptr) { + derr << devid + <<": can't find device path " << dendl; + continue; + } + if (bluefs->bdev_support_label(devid)) { + if (_set_bdev_label_size(p, size) >= 0) { + out << devid + << " : size label updated to " << size + << std::endl; + } + } + } + uint64_t size0 = fm->get_size(); + uint64_t size = bdev->get_size(); + if (size0 < size) { + out << bluefs_layout.shared_bdev + << " : expanding " << " from 0x" << std::hex + << size0 << " to 0x" << size << std::dec << std::endl; + _write_out_fm_meta(size); + if (bdev->supported_bdev_label()) { + if (_set_bdev_label_size(path, size) >= 0) { + out << bluefs_layout.shared_bdev + << " : size label updated to " << size + << std::endl; + } + } + _close_db_and_around(true); + + // mount in read/write to sync expansion changes + r = _mount(); + ceph_assert(r == 0); + umount(); + } else { + _close_db_and_around(true); + } + return r; +} + +int BlueStore::dump_bluefs_sizes(ostream& out) +{ + int r = _open_db_and_around(true); + ceph_assert(r == 0); + bluefs->dump_block_extents(out); + _close_db_and_around(true); + return r; +} + +void BlueStore::set_cache_shards(unsigned num) +{ + dout(10) << __func__ << " " << num << dendl; + size_t oold = onode_cache_shards.size(); + size_t bold = buffer_cache_shards.size(); + ceph_assert(num >= oold && num >= bold); + onode_cache_shards.resize(num); + buffer_cache_shards.resize(num); + for (unsigned i = oold; i < num; ++i) { + onode_cache_shards[i] = + OnodeCacheShard::create(cct, cct->_conf->bluestore_cache_type, + logger); + } + for (unsigned i = bold; i < num; ++i) { + buffer_cache_shards[i] = + BufferCacheShard::create(cct, cct->_conf->bluestore_cache_type, + logger); + } +} + +int BlueStore::_mount() +{ + dout(1) << __func__ << " path " << path << dendl; + + _kv_only = false; + if (cct->_conf->bluestore_fsck_on_mount) { + int rc = fsck(cct->_conf->bluestore_fsck_on_mount_deep); + if (rc < 0) + return rc; + if (rc > 0) { + derr << __func__ << " fsck found " << rc << " errors" << dendl; + return -EIO; + } + } + + if (cct->_conf->osd_max_object_size > OBJECT_MAX_SIZE) { + derr << __func__ << " osd_max_object_size " + << cct->_conf->osd_max_object_size << " > bluestore max " + << OBJECT_MAX_SIZE << dendl; + return -EINVAL; + } + + int r = _open_db_and_around(false); + if (r < 0) { + return r; + } + + r = _upgrade_super(); + if (r < 0) { + goto out_db; + } + + r = _open_collections(); + if (r < 0) + goto out_db; + + r = _reload_logger(); + if (r < 0) + goto out_coll; + + _kv_start(); + + if (bdev->is_smr()) { + _zoned_cleaner_start(); + } + + r = _deferred_replay(); + if (r < 0) + goto out_stop; + + mempool_thread.init(); + + if ((!per_pool_stat_collection || per_pool_omap != OMAP_PER_PG) && + cct->_conf->bluestore_fsck_quick_fix_on_mount == true) { + + auto was_per_pool_omap = per_pool_omap; + + dout(1) << __func__ << " quick-fix on mount" << dendl; + _fsck_on_open(FSCK_SHALLOW, true); + + //reread statfs + //FIXME minor: replace with actual open/close? + _open_statfs(); + _check_legacy_statfs_alert(); + + //set again as hopefully it has been fixed + if (was_per_pool_omap != OMAP_PER_PG) { + _set_per_pool_omap(); + } + } + + mounted = true; + return 0; + + out_stop: + if (bdev->is_smr()) { + _zoned_cleaner_stop(); + } + _kv_stop(); + out_coll: + _shutdown_cache(); + out_db: + _close_db_and_around(false); + return r; +} + +int BlueStore::umount() +{ + ceph_assert(_kv_only || mounted); + dout(1) << __func__ << dendl; + + _osr_drain_all(); + + mounted = false; + if (!_kv_only) { + mempool_thread.shutdown(); + if (bdev->is_smr()) { + dout(20) << __func__ << " stopping zone cleaner thread" << dendl; + _zoned_cleaner_stop(); + } + dout(20) << __func__ << " stopping kv thread" << dendl; + _kv_stop(); + _shutdown_cache(); + dout(20) << __func__ << " closing" << dendl; + + } + _close_db_and_around(false); + + if (cct->_conf->bluestore_fsck_on_umount) { + int rc = fsck(cct->_conf->bluestore_fsck_on_umount_deep); + if (rc < 0) + return rc; + if (rc > 0) { + derr << __func__ << " fsck found " << rc << " errors" << dendl; + return -EIO; + } + } + return 0; +} + +int BlueStore::cold_open() +{ + return _open_db_and_around(true); +} + +int BlueStore::cold_close() +{ + _close_db_and_around(true); + return 0; +} + +// derr wrapper to limit enormous output and avoid log flooding. +// Of limited use where such output is expected for now +#define fsck_derr(err_cnt, threshold) \ + if (err_cnt <= threshold) { \ + bool need_skip_print = err_cnt == threshold; \ + derr + +#define fsck_dendl \ + dendl; \ + if (need_skip_print) \ + derr << "more error lines skipped..." << dendl; \ + } + +int _fsck_sum_extents( + const PExtentVector& extents, + bool compressed, + store_statfs_t& expected_statfs) +{ + for (auto e : extents) { + if (!e.is_valid()) + continue; + expected_statfs.allocated += e.length; + if (compressed) { + expected_statfs.data_compressed_allocated += e.length; + } + } + return 0; +} + +int BlueStore::_fsck_check_extents( + std::string_view ctx_descr, + const PExtentVector& extents, + bool compressed, + mempool_dynamic_bitset &used_blocks, + uint64_t granularity, + BlueStoreRepairer* repairer, + store_statfs_t& expected_statfs, + FSCKDepth depth) +{ + dout(30) << __func__ << " " << ctx_descr << ", extents " << extents << dendl; + int errors = 0; + for (auto e : extents) { + if (!e.is_valid()) + continue; + expected_statfs.allocated += e.length; + if (compressed) { + expected_statfs.data_compressed_allocated += e.length; + } + if (depth != FSCK_SHALLOW) { + bool already = false; + apply_for_bitset_range( + e.offset, e.length, granularity, used_blocks, + [&](uint64_t pos, mempool_dynamic_bitset &bs) { + if (bs.test(pos)) { + if (repairer) { + repairer->note_misreference( + pos * min_alloc_size, min_alloc_size, !already); + } + if (!already) { + derr << __func__ << "::fsck error: " << ctx_descr << ", extent " << e + << " or a subset is already allocated (misreferenced)" << dendl; + ++errors; + already = true; + } + } + else + bs.set(pos); + }); + + if (e.end() > bdev->get_size()) { + derr << "fsck error: " << ctx_descr << ", extent " << e + << " past end of block device" << dendl; + ++errors; + } + } + } + return errors; +} + +void BlueStore::_fsck_check_pool_statfs( + BlueStore::per_pool_statfs& expected_pool_statfs, + int64_t& errors, + int64_t& warnings, + BlueStoreRepairer* repairer) +{ + auto it = db->get_iterator(PREFIX_STAT, KeyValueDB::ITERATOR_NOCACHE); + if (it) { + for (it->lower_bound(string()); it->valid(); it->next()) { + string key = it->key(); + if (key == BLUESTORE_GLOBAL_STATFS_KEY) { + if (repairer) { + ++errors; + repairer->remove_key(db, PREFIX_STAT, BLUESTORE_GLOBAL_STATFS_KEY); + derr << "fsck error: " << "legacy statfs record found, removing" + << dendl; + } + continue; + } + uint64_t pool_id; + if (get_key_pool_stat(key, &pool_id) < 0) { + derr << "fsck error: bad key " << key + << "in statfs namespece" << dendl; + if (repairer) { + repairer->remove_key(db, PREFIX_STAT, key); + } + ++errors; + continue; + } + + volatile_statfs vstatfs; + bufferlist bl = it->value(); + auto blp = bl.cbegin(); + try { + vstatfs.decode(blp); + } catch (ceph::buffer::error& e) { + derr << "fsck error: failed to decode Pool StatFS record" + << pretty_binary_string(key) << dendl; + if (repairer) { + dout(20) << __func__ << " undecodable Pool StatFS record, key:'" + << pretty_binary_string(key) + << "', removing" << dendl; + repairer->remove_key(db, PREFIX_STAT, key); + } + ++errors; + vstatfs.reset(); + } + auto stat_it = expected_pool_statfs.find(pool_id); + if (stat_it == expected_pool_statfs.end()) { + if (vstatfs.is_empty()) { + // we don't consider that as an error since empty pool statfs + // are left in DB for now + dout(20) << "fsck inf: found empty stray Pool StatFS record for pool id 0x" + << std::hex << pool_id << std::dec << dendl; + if (repairer) { + // but we need to increment error count in case of repair + // to have proper counters at the end + // (as repairer increments recovery counter anyway). + ++errors; + } + } else { + derr << "fsck error: found stray Pool StatFS record for pool id 0x" + << std::hex << pool_id << std::dec << dendl; + ++errors; + } + if (repairer) { + repairer->remove_key(db, PREFIX_STAT, key); + } + continue; + } + store_statfs_t statfs; + vstatfs.publish(&statfs); + if (!(stat_it->second == statfs)) { + derr << "fsck error: actual " << statfs + << " != expected " << stat_it->second + << " for pool " + << std::hex << pool_id << std::dec << dendl; + if (repairer) { + repairer->fix_statfs(db, key, stat_it->second); + } + ++errors; + } + expected_pool_statfs.erase(stat_it); + } + } // if (it) + for (auto& s : expected_pool_statfs) { + if (s.second.is_zero()) { + // we might lack empty statfs recs in DB + continue; + } + derr << "fsck error: missing Pool StatFS record for pool " + << std::hex << s.first << std::dec << dendl; + if (repairer) { + string key; + get_pool_stat_key(s.first, &key); + repairer->fix_statfs(db, key, s.second); + } + ++errors; + } + if (!per_pool_stat_collection && + repairer) { + // by virtue of running this method, we correct the top-level + // error of having global stats + repairer->inc_repaired(); + } +} + +void BlueStore::_fsck_repair_shared_blobs( + BlueStoreRepairer& repairer, + shared_blob_2hash_tracker_t& sb_ref_counts, + sb_info_space_efficient_map_t& sb_info) +{ + auto sb_ref_mismatches = sb_ref_counts.count_non_zero(); + dout(1) << __func__ << " repairing shared_blobs, ref mismatch estimate: " + << sb_ref_mismatches << dendl; + if (!sb_ref_mismatches) // not expected to succeed, just in case + return; + + + auto foreach_shared_blob = [&](std::function< + void (coll_t, + ghobject_t, + uint64_t, + const bluestore_blob_t&)> cb) { + auto it = db->get_iterator(PREFIX_OBJ, KeyValueDB::ITERATOR_NOCACHE); + if (it) { + CollectionRef c; + spg_t pgid; + for (it->lower_bound(string()); it->valid(); it->next()) { + dout(30) << __func__ << " key " + << pretty_binary_string(it->key()) + << dendl; + if (is_extent_shard_key(it->key())) { + continue; + } + + ghobject_t oid; + int r = get_key_object(it->key(), &oid); + if (r < 0) { + continue; + } + + if (!c || + oid.shard_id != pgid.shard || + oid.hobj.get_logical_pool() != (int64_t)pgid.pool() || + !c->contains(oid)) { + c = nullptr; + for (auto& p : coll_map) { + if (p.second->contains(oid)) { + c = p.second; + break; + } + } + if (!c) { + continue; + } + } + dout(20) << __func__ + << " inspecting shared blob refs for col:" << c->cid + << " obj:" << oid + << dendl; + + OnodeRef o; + o.reset(Onode::decode(c, oid, it->key(), it->value())); + o->extent_map.fault_range(db, 0, OBJECT_MAX_SIZE); + + _dump_onode<30>(cct, *o); + + mempool::bluestore_fsck::set<BlobRef> passed_sbs; + for (auto& e : o->extent_map.extent_map) { + auto& b = e.blob->get_blob(); + if (b.is_shared() && passed_sbs.count(e.blob) == 0) { + auto sbid = e.blob->shared_blob->get_sbid(); + cb(c->cid, oid, sbid, b); + passed_sbs.emplace(e.blob); + } + } // for ... extent_map + } // for ... it->valid + } //if (it(PREFIX_OBJ)) + }; //foreach_shared_blob fn declaration + + mempool::bluestore_fsck::map<uint64_t, bluestore_extent_ref_map_t> refs_map; + + // first iteration over objects to identify all the broken sbids + foreach_shared_blob( [&](coll_t cid, + ghobject_t oid, + uint64_t sbid, + const bluestore_blob_t& b) { + auto it = refs_map.lower_bound(sbid); + if(it != refs_map.end() && it->first == sbid) { + return; + } + for (auto& p : b.get_extents()) { + if (p.is_valid() && + !sb_ref_counts.test_all_zero_range(sbid, + p.offset, + p.length)) { + refs_map.emplace_hint(it, sbid, bluestore_extent_ref_map_t()); + dout(20) << __func__ + << " broken shared blob found for col:" << cid + << " obj:" << oid + << " sbid 0x " << std::hex << sbid << std::dec + << dendl; + break; + } + } + }); + + // second iteration over objects to build new ref map for the broken sbids + foreach_shared_blob( [&](coll_t cid, + ghobject_t oid, + uint64_t sbid, + const bluestore_blob_t& b) { + auto it = refs_map.find(sbid); + if(it == refs_map.end()) { + return; + } + for (auto& p : b.get_extents()) { + if (p.is_valid()) { + it->second.get(p.offset, p.length); + break; + } + } + }); + + // update shared blob records + auto ref_it = refs_map.begin(); + while (ref_it != refs_map.end()) { + size_t cnt = 0; + const size_t max_transactions = 4096; + KeyValueDB::Transaction txn = db->get_transaction(); + for (cnt = 0; + cnt < max_transactions && ref_it != refs_map.end(); + ref_it++) { + auto sbid = ref_it->first; + dout(20) << __func__ << " repaired shared_blob 0x" + << std::hex << sbid << std::dec + << ref_it->second << dendl; + repairer.fix_shared_blob(txn, sbid, &ref_it->second, 0); + cnt++; + } + if (cnt) { + db->submit_transaction_sync(txn); + cnt = 0; + } + } + // remove stray shared blob records + size_t cnt = 0; + const size_t max_transactions = 4096; + KeyValueDB::Transaction txn = db->get_transaction(); + sb_info.foreach_stray([&](const sb_info_t& sbi) { + auto sbid = sbi.get_sbid(); + dout(20) << __func__ << " removing stray shared_blob 0x" + << std::hex << sbid << std::dec + << dendl; + repairer.fix_shared_blob(txn, sbid, nullptr, 0); + cnt++; + if (cnt >= max_transactions) {} + db->submit_transaction_sync(txn); + txn = db->get_transaction(); + cnt = 0; + }); + if (cnt > 0) { + db->submit_transaction_sync(txn); + } + + // amount of repairs to report to be equal to previously + // determined error estimation, not the actual number of updated shared blobs + repairer.inc_repaired(sb_ref_mismatches); +} + +BlueStore::OnodeRef BlueStore::fsck_check_objects_shallow( + BlueStore::FSCKDepth depth, + int64_t pool_id, + BlueStore::CollectionRef c, + const ghobject_t& oid, + const string& key, + const bufferlist& value, + mempool::bluestore_fsck::list<string>* expecting_shards, + map<BlobRef, bluestore_blob_t::unused_t>* referenced, + const BlueStore::FSCK_ObjectCtx& ctx) +{ + auto& errors = ctx.errors; + auto& num_objects = ctx.num_objects; + auto& num_extents = ctx.num_extents; + auto& num_blobs = ctx.num_blobs; + auto& num_sharded_objects = ctx.num_sharded_objects; + auto& num_spanning_blobs = ctx.num_spanning_blobs; + auto used_blocks = ctx.used_blocks; + auto sb_info_lock = ctx.sb_info_lock; + auto& sb_info = ctx.sb_info; + auto& sb_ref_counts = ctx.sb_ref_counts; + auto repairer = ctx.repairer; + + store_statfs_t* res_statfs = (per_pool_stat_collection || repairer) ? + &ctx.expected_pool_statfs[pool_id] : + &ctx.expected_store_statfs; + + dout(10) << __func__ << " " << oid << dendl; + OnodeRef o; + o.reset(Onode::decode(c, oid, key, value)); + ++num_objects; + + num_spanning_blobs += o->extent_map.spanning_blob_map.size(); + + o->extent_map.fault_range(db, 0, OBJECT_MAX_SIZE); + _dump_onode<30>(cct, *o); + // shards + if (!o->extent_map.shards.empty()) { + ++num_sharded_objects; + if (depth != FSCK_SHALLOW) { + ceph_assert(expecting_shards); + for (auto& s : o->extent_map.shards) { + dout(20) << __func__ << " shard " << *s.shard_info << dendl; + expecting_shards->push_back(string()); + get_extent_shard_key(o->key, s.shard_info->offset, + &expecting_shards->back()); + if (s.shard_info->offset >= o->onode.size) { + derr << "fsck error: " << oid << " shard 0x" << std::hex + << s.shard_info->offset << " past EOF at 0x" << o->onode.size + << std::dec << dendl; + ++errors; + } + } + } + } + + // lextents + uint64_t pos = 0; + mempool::bluestore_fsck::map<BlobRef, + bluestore_blob_use_tracker_t> ref_map; + for (auto& l : o->extent_map.extent_map) { + dout(20) << __func__ << " " << l << dendl; + if (l.logical_offset < pos) { + derr << "fsck error: " << oid << " lextent at 0x" + << std::hex << l.logical_offset + << " overlaps with the previous, which ends at 0x" << pos + << std::dec << dendl; + ++errors; + } + if (depth != FSCK_SHALLOW && + o->extent_map.spans_shard(l.logical_offset, l.length)) { + derr << "fsck error: " << oid << " lextent at 0x" + << std::hex << l.logical_offset << "~" << l.length + << " spans a shard boundary" + << std::dec << dendl; + ++errors; + } + pos = l.logical_offset + l.length; + res_statfs->data_stored += l.length; + ceph_assert(l.blob); + const bluestore_blob_t& blob = l.blob->get_blob(); + + auto& ref = ref_map[l.blob]; + if (ref.is_empty()) { + uint32_t min_release_size = blob.get_release_size(min_alloc_size); + uint32_t l = blob.get_logical_length(); + ref.init(l, min_release_size); + } + ref.get( + l.blob_offset, + l.length); + ++num_extents; + if (depth != FSCK_SHALLOW && + blob.has_unused()) { + ceph_assert(referenced); + auto p = referenced->find(l.blob); + bluestore_blob_t::unused_t* pu; + if (p == referenced->end()) { + pu = &(*referenced)[l.blob]; + } + else { + pu = &p->second; + } + uint64_t blob_len = blob.get_logical_length(); + ceph_assert((blob_len % (sizeof(*pu) * 8)) == 0); + ceph_assert(l.blob_offset + l.length <= blob_len); + uint64_t chunk_size = blob_len / (sizeof(*pu) * 8); + uint64_t start = l.blob_offset / chunk_size; + uint64_t end = + round_up_to(l.blob_offset + l.length, chunk_size) / chunk_size; + for (auto i = start; i < end; ++i) { + (*pu) |= (1u << i); + } + } + } //for (auto& l : o->extent_map.extent_map) + + for (auto& i : ref_map) { + ++num_blobs; + const bluestore_blob_t& blob = i.first->get_blob(); + bool equal = + depth == FSCK_SHALLOW ? true : + i.first->get_blob_use_tracker().equal(i.second); + if (!equal) { + derr << "fsck error: " << oid << " blob " << *i.first + << " doesn't match expected ref_map " << i.second << dendl; + ++errors; + } + if (blob.is_compressed()) { + res_statfs->data_compressed += blob.get_compressed_payload_length(); + res_statfs->data_compressed_original += + i.first->get_referenced_bytes(); + } + if (depth != FSCK_SHALLOW && repairer) { + for (auto e : blob.get_extents()) { + if (!e.is_valid()) + continue; + repairer->set_space_used(e.offset, e.length, c->cid, oid); + } + } + if (blob.is_shared()) { + if (i.first->shared_blob->get_sbid() > blobid_max) { + derr << "fsck error: " << oid << " blob " << blob + << " sbid " << i.first->shared_blob->get_sbid() << " > blobid_max " + << blobid_max << dendl; + ++errors; + } else if (i.first->shared_blob->get_sbid() == 0) { + derr << "fsck error: " << oid << " blob " << blob + << " marked as shared but has uninitialized sbid" + << dendl; + ++errors; + } + // the below lock is optional and provided in multithreading mode only + if (sb_info_lock) { + sb_info_lock->lock(); + } + auto sbid = i.first->shared_blob->get_sbid(); + sb_info_t& sbi = sb_info.add_or_adopt(i.first->shared_blob->get_sbid()); + ceph_assert(sbi.pool_id == sb_info_t::INVALID_POOL_ID || + sbi.pool_id == oid.hobj.get_logical_pool()); + sbi.pool_id = oid.hobj.get_logical_pool(); + bool compressed = blob.is_compressed(); + for (auto e : blob.get_extents()) { + if (e.is_valid()) { + if (compressed) { + ceph_assert(sbi.allocated_chunks <= 0); + sbi.allocated_chunks -= (e.length >> min_alloc_size_order); + } else { + ceph_assert(sbi.allocated_chunks >= 0); + sbi.allocated_chunks += (e.length >> min_alloc_size_order); + } + sb_ref_counts.inc_range(sbid, e.offset, e.length, 1); + } + } + if (sb_info_lock) { + sb_info_lock->unlock(); + } + } else if (depth != FSCK_SHALLOW) { + ceph_assert(used_blocks); + string ctx_descr = " oid " + stringify(oid); + errors += _fsck_check_extents(ctx_descr, + blob.get_extents(), + blob.is_compressed(), + *used_blocks, + fm->get_alloc_size(), + repairer, + *res_statfs, + depth); + } else { + errors += _fsck_sum_extents( + blob.get_extents(), + blob.is_compressed(), + *res_statfs); + } + } // for (auto& i : ref_map) + + { + auto &sbm = o->extent_map.spanning_blob_map; + size_t broken = 0; + BlobRef first_broken; + for (auto it = sbm.begin(); it != sbm.end();) { + auto it1 = it++; + if (ref_map.count(it1->second) == 0) { + if (!broken) { + first_broken = it1->second; + ++errors; + } + broken++; + if (repairer) { + sbm.erase(it1); + } + } + } + if (broken) { + derr << "fsck error: " << oid << " - " << broken + << " zombie spanning blob(s) found, the first one: " + << *first_broken << dendl; + if(repairer) { + repairer->fix_spanning_blobs( + db, + [&](KeyValueDB::Transaction txn) { + _record_onode(o, txn); + }); + } + } + } + + if (o->onode.has_omap()) { + _fsck_check_object_omap(depth, o, ctx); + } + + return o; +} + +#include "common/WorkQueue.h" + +class ShallowFSCKThreadPool : public ThreadPool +{ +public: + ShallowFSCKThreadPool(CephContext* cct_, std::string nm, std::string tn, int n) : + ThreadPool(cct_, nm, tn, n) { + } + void worker(ThreadPool::WorkThread* wt) override { + int next_wq = 0; + while (!_stop) { + next_wq %= work_queues.size(); + WorkQueue_ *wq = work_queues[next_wq++]; + + void* item = wq->_void_dequeue(); + if (item) { + processing++; + TPHandle tp_handle(cct, nullptr, wq->timeout_interval, wq->suicide_interval); + wq->_void_process(item, tp_handle); + processing--; + } + } + } + template <size_t BatchLen> + struct FSCKWorkQueue : public ThreadPool::WorkQueue_ + { + struct Entry { + int64_t pool_id; + BlueStore::CollectionRef c; + ghobject_t oid; + string key; + bufferlist value; + }; + struct Batch { + std::atomic<size_t> running = { 0 }; + size_t entry_count = 0; + std::array<Entry, BatchLen> entries; + + int64_t errors = 0; + int64_t warnings = 0; + uint64_t num_objects = 0; + uint64_t num_extents = 0; + uint64_t num_blobs = 0; + uint64_t num_sharded_objects = 0; + uint64_t num_spanning_blobs = 0; + store_statfs_t expected_store_statfs; + BlueStore::per_pool_statfs expected_pool_statfs; + }; + + size_t batchCount; + BlueStore* store = nullptr; + + ceph::mutex* sb_info_lock = nullptr; + sb_info_space_efficient_map_t* sb_info = nullptr; + shared_blob_2hash_tracker_t* sb_ref_counts = nullptr; + BlueStoreRepairer* repairer = nullptr; + + Batch* batches = nullptr; + size_t last_batch_pos = 0; + bool batch_acquired = false; + + FSCKWorkQueue(std::string n, + size_t _batchCount, + BlueStore* _store, + ceph::mutex* _sb_info_lock, + sb_info_space_efficient_map_t& _sb_info, + shared_blob_2hash_tracker_t& _sb_ref_counts, + BlueStoreRepairer* _repairer) : + WorkQueue_(n, ceph::timespan::zero(), ceph::timespan::zero()), + batchCount(_batchCount), + store(_store), + sb_info_lock(_sb_info_lock), + sb_info(&_sb_info), + sb_ref_counts(&_sb_ref_counts), + repairer(_repairer) + { + batches = new Batch[batchCount]; + } + ~FSCKWorkQueue() { + delete[] batches; + } + + /// Remove all work items from the queue. + void _clear() override { + //do nothing + } + /// Check whether there is anything to do. + bool _empty() override { + ceph_assert(false); + } + + /// Get the next work item to process. + void* _void_dequeue() override { + size_t pos = rand() % batchCount; + size_t pos0 = pos; + do { + auto& batch = batches[pos]; + if (batch.running.fetch_add(1) == 0) { + if (batch.entry_count) { + return &batch; + } + } + batch.running--; + pos++; + pos %= batchCount; + } while (pos != pos0); + return nullptr; + } + /** @brief Process the work item. + * This function will be called several times in parallel + * and must therefore be thread-safe. */ + void _void_process(void* item, TPHandle& handle) override { + Batch* batch = (Batch*)item; + + BlueStore::FSCK_ObjectCtx ctx( + batch->errors, + batch->warnings, + batch->num_objects, + batch->num_extents, + batch->num_blobs, + batch->num_sharded_objects, + batch->num_spanning_blobs, + nullptr, // used_blocks + nullptr, //used_omap_head + sb_info_lock, + *sb_info, + *sb_ref_counts, + batch->expected_store_statfs, + batch->expected_pool_statfs, + repairer); + + for (size_t i = 0; i < batch->entry_count; i++) { + auto& entry = batch->entries[i]; + + store->fsck_check_objects_shallow( + BlueStore::FSCK_SHALLOW, + entry.pool_id, + entry.c, + entry.oid, + entry.key, + entry.value, + nullptr, // expecting_shards - this will need a protection if passed + nullptr, // referenced + ctx); + } + //std::cout << "processed " << batch << std::endl; + batch->entry_count = 0; + batch->running--; + } + /** @brief Synchronously finish processing a work item. + * This function is called after _void_process with the global thread pool lock held, + * so at most one copy will execute simultaneously for a given thread pool. + * It can be used for non-thread-safe finalization. */ + void _void_process_finish(void*) override { + ceph_assert(false); + } + + bool queue( + int64_t pool_id, + BlueStore::CollectionRef c, + const ghobject_t& oid, + const string& key, + const bufferlist& value) { + bool res = false; + size_t pos0 = last_batch_pos; + if (!batch_acquired) { + do { + auto& batch = batches[last_batch_pos]; + if (batch.running.fetch_add(1) == 0) { + if (batch.entry_count < BatchLen) { + batch_acquired = true; + break; + } + } + batch.running.fetch_sub(1); + last_batch_pos++; + last_batch_pos %= batchCount; + } while (last_batch_pos != pos0); + } + if (batch_acquired) { + auto& batch = batches[last_batch_pos]; + ceph_assert(batch.running); + ceph_assert(batch.entry_count < BatchLen); + + auto& entry = batch.entries[batch.entry_count]; + entry.pool_id = pool_id; + entry.c = c; + entry.oid = oid; + entry.key = key; + entry.value = value; + + ++batch.entry_count; + if (batch.entry_count == BatchLen) { + batch_acquired = false; + batch.running.fetch_sub(1); + last_batch_pos++; + last_batch_pos %= batchCount; + } + res = true; + } + return res; + } + + void finalize(ThreadPool& tp, + BlueStore::FSCK_ObjectCtx& ctx) { + if (batch_acquired) { + auto& batch = batches[last_batch_pos]; + ceph_assert(batch.running); + batch.running.fetch_sub(1); + } + tp.stop(); + + for (size_t i = 0; i < batchCount; i++) { + auto& batch = batches[i]; + + //process leftovers if any + if (batch.entry_count) { + TPHandle tp_handle(store->cct, + nullptr, + timeout_interval, + suicide_interval); + ceph_assert(batch.running == 0); + + batch.running++; // just to be on-par with the regular call + _void_process(&batch, tp_handle); + } + ceph_assert(batch.entry_count == 0); + + ctx.errors += batch.errors; + ctx.warnings += batch.warnings; + ctx.num_objects += batch.num_objects; + ctx.num_extents += batch.num_extents; + ctx.num_blobs += batch.num_blobs; + ctx.num_sharded_objects += batch.num_sharded_objects; + ctx.num_spanning_blobs += batch.num_spanning_blobs; + + ctx.expected_store_statfs.add(batch.expected_store_statfs); + + for (auto it = batch.expected_pool_statfs.begin(); + it != batch.expected_pool_statfs.end(); + it++) { + ctx.expected_pool_statfs[it->first].add(it->second); + } + } + } + }; +}; + +void BlueStore::_fsck_check_object_omap(FSCKDepth depth, + OnodeRef& o, + const BlueStore::FSCK_ObjectCtx& ctx) +{ + auto& errors = ctx.errors; + auto& warnings = ctx.warnings; + auto repairer = ctx.repairer; + + ceph_assert(o->onode.has_omap()); + if (!o->onode.is_perpool_omap() && !o->onode.is_pgmeta_omap()) { + if (per_pool_omap == OMAP_PER_POOL) { + fsck_derr(errors, MAX_FSCK_ERROR_LINES) + << "fsck error: " << o->oid + << " has omap that is not per-pool or pgmeta" + << fsck_dendl; + ++errors; + } else { + const char* w; + int64_t num; + if (cct->_conf->bluestore_fsck_error_on_no_per_pool_omap) { + ++errors; + num = errors; + w = "error"; + } else { + ++warnings; + num = warnings; + w = "warning"; + } + fsck_derr(num, MAX_FSCK_ERROR_LINES) + << "fsck " << w << ": " << o->oid + << " has omap that is not per-pool or pgmeta" + << fsck_dendl; + } + } else if (!o->onode.is_perpg_omap() && !o->onode.is_pgmeta_omap()) { + if (per_pool_omap == OMAP_PER_PG) { + fsck_derr(errors, MAX_FSCK_ERROR_LINES) + << "fsck error: " << o->oid + << " has omap that is not per-pg or pgmeta" + << fsck_dendl; + ++errors; + } else { + const char* w; + int64_t num; + if (cct->_conf->bluestore_fsck_error_on_no_per_pg_omap) { + ++errors; + num = errors; + w = "error"; + } else { + ++warnings; + num = warnings; + w = "warning"; + } + fsck_derr(num, MAX_FSCK_ERROR_LINES) + << "fsck " << w << ": " << o->oid + << " has omap that is not per-pg or pgmeta" + << fsck_dendl; + } + } + if (repairer && + !o->onode.is_perpg_omap() && + !o->onode.is_pgmeta_omap()) { + dout(10) << "fsck converting " << o->oid << " omap to per-pg" << dendl; + bufferlist header; + map<string, bufferlist> kv; + { + KeyValueDB::Transaction txn = db->get_transaction(); + uint64_t txn_cost = 0; + const string& prefix = Onode::calc_omap_prefix(o->onode.flags); + uint8_t new_flags = o->onode.flags | + bluestore_onode_t::FLAG_PERPOOL_OMAP | + bluestore_onode_t::FLAG_PERPG_OMAP; + const string& new_omap_prefix = Onode::calc_omap_prefix(new_flags); + + KeyValueDB::Iterator it = db->get_iterator(prefix); + string head, tail; + o->get_omap_header(&head); + o->get_omap_tail(&tail); + it->lower_bound(head); + // head + if (it->valid() && it->key() == head) { + dout(30) << __func__ << " got header" << dendl; + header = it->value(); + if (header.length()) { + string new_head; + Onode::calc_omap_header(new_flags, o.get(), &new_head); + txn->set(new_omap_prefix, new_head, header); + txn_cost += new_head.length() + header.length(); + } + it->next(); + } + // tail + { + string new_tail; + Onode::calc_omap_tail(new_flags, o.get(), &new_tail); + bufferlist empty; + txn->set(new_omap_prefix, new_tail, empty); + txn_cost += new_tail.length() + new_tail.length(); + } + // values + string final_key; + Onode::calc_omap_key(new_flags, o.get(), string(), &final_key); + size_t base_key_len = final_key.size(); + while (it->valid() && it->key() < tail) { + string user_key; + o->decode_omap_key(it->key(), &user_key); + dout(20) << __func__ << " got " << pretty_binary_string(it->key()) + << " -> " << user_key << dendl; + + final_key.resize(base_key_len); + final_key += user_key; + auto v = it->value(); + txn->set(new_omap_prefix, final_key, v); + txn_cost += final_key.length() + v.length(); + + // submit a portion if cost exceeds 16MB + if (txn_cost >= 16 * (1 << 20) ) { + db->submit_transaction_sync(txn); + txn = db->get_transaction(); + txn_cost = 0; + } + it->next(); + } + if (txn_cost > 0) { + db->submit_transaction_sync(txn); + } + } + // finalize: remove legacy data + { + KeyValueDB::Transaction txn = db->get_transaction(); + // remove old keys + const string& old_omap_prefix = o->get_omap_prefix(); + string old_head, old_tail; + o->get_omap_header(&old_head); + o->get_omap_tail(&old_tail); + txn->rm_range_keys(old_omap_prefix, old_head, old_tail); + txn->rmkey(old_omap_prefix, old_tail); + // set flag + o->onode.set_flag(bluestore_onode_t::FLAG_PERPOOL_OMAP | bluestore_onode_t::FLAG_PERPG_OMAP); + _record_onode(o, txn); + db->submit_transaction_sync(txn); + repairer->inc_repaired(); + repairer->request_compaction(); + } + } +} + +void BlueStore::_fsck_check_objects(FSCKDepth depth, + BlueStore::FSCK_ObjectCtx& ctx) +{ + auto& errors = ctx.errors; + auto sb_info_lock = ctx.sb_info_lock; + auto& sb_info = ctx.sb_info; + auto& sb_ref_counts = ctx.sb_ref_counts; + auto repairer = ctx.repairer; + + uint64_t_btree_t used_nids; + + size_t processed_myself = 0; + + auto it = db->get_iterator(PREFIX_OBJ, KeyValueDB::ITERATOR_NOCACHE); + mempool::bluestore_fsck::list<string> expecting_shards; + if (it) { + const size_t thread_count = cct->_conf->bluestore_fsck_quick_fix_threads; + typedef ShallowFSCKThreadPool::FSCKWorkQueue<256> WQ; + std::unique_ptr<WQ> wq( + new WQ( + "FSCKWorkQueue", + (thread_count ? : 1) * 32, + this, + sb_info_lock, + sb_info, + sb_ref_counts, + repairer)); + + ShallowFSCKThreadPool thread_pool(cct, "ShallowFSCKThreadPool", "ShallowFSCK", thread_count); + + thread_pool.add_work_queue(wq.get()); + if (depth == FSCK_SHALLOW && thread_count > 0) { + //not the best place but let's check anyway + ceph_assert(sb_info_lock); + thread_pool.start(); + } + + //fill global if not overriden below + CollectionRef c; + int64_t pool_id = -1; + spg_t pgid; + for (it->lower_bound(string()); it->valid(); it->next()) { + dout(30) << __func__ << " key " + << pretty_binary_string(it->key()) << dendl; + if (is_extent_shard_key(it->key())) { + if (depth == FSCK_SHALLOW) { + continue; + } + while (!expecting_shards.empty() && + expecting_shards.front() < it->key()) { + derr << "fsck error: missing shard key " + << pretty_binary_string(expecting_shards.front()) + << dendl; + ++errors; + expecting_shards.pop_front(); + } + if (!expecting_shards.empty() && + expecting_shards.front() == it->key()) { + // all good + expecting_shards.pop_front(); + continue; + } + + uint32_t offset; + string okey; + get_key_extent_shard(it->key(), &okey, &offset); + derr << "fsck error: stray shard 0x" << std::hex << offset + << std::dec << dendl; + if (expecting_shards.empty()) { + derr << "fsck error: " << pretty_binary_string(it->key()) + << " is unexpected" << dendl; + ++errors; + continue; + } + while (expecting_shards.front() > it->key()) { + derr << "fsck error: saw " << pretty_binary_string(it->key()) + << dendl; + derr << "fsck error: exp " + << pretty_binary_string(expecting_shards.front()) << dendl; + ++errors; + expecting_shards.pop_front(); + if (expecting_shards.empty()) { + break; + } + } + continue; + } + + ghobject_t oid; + int r = get_key_object(it->key(), &oid); + if (r < 0) { + derr << "fsck error: bad object key " + << pretty_binary_string(it->key()) << dendl; + ++errors; + continue; + } + if (!c || + oid.shard_id != pgid.shard || + oid.hobj.get_logical_pool() != (int64_t)pgid.pool() || + !c->contains(oid)) { + c = nullptr; + for (auto& p : coll_map) { + if (p.second->contains(oid)) { + c = p.second; + break; + } + } + if (!c) { + derr << "fsck error: stray object " << oid + << " not owned by any collection" << dendl; + ++errors; + continue; + } + pool_id = c->cid.is_pg(&pgid) ? pgid.pool() : META_POOL_ID; + dout(20) << __func__ << " collection " << c->cid << " " << c->cnode + << dendl; + } + + if (depth != FSCK_SHALLOW && + !expecting_shards.empty()) { + for (auto& k : expecting_shards) { + derr << "fsck error: missing shard key " + << pretty_binary_string(k) << dendl; + } + ++errors; + expecting_shards.clear(); + } + + bool queued = false; + if (depth == FSCK_SHALLOW && thread_count > 0) { + queued = wq->queue( + pool_id, + c, + oid, + it->key(), + it->value()); + } + OnodeRef o; + map<BlobRef, bluestore_blob_t::unused_t> referenced; + + if (!queued) { + ++processed_myself; + + o = fsck_check_objects_shallow( + depth, + pool_id, + c, + oid, + it->key(), + it->value(), + &expecting_shards, + &referenced, + ctx); + } + + if (depth != FSCK_SHALLOW) { + ceph_assert(o != nullptr); + if (o->onode.nid) { + if (o->onode.nid > nid_max) { + derr << "fsck error: " << oid << " nid " << o->onode.nid + << " > nid_max " << nid_max << dendl; + ++errors; + } + if (used_nids.count(o->onode.nid)) { + derr << "fsck error: " << oid << " nid " << o->onode.nid + << " already in use" << dendl; + ++errors; + continue; // go for next object + } + used_nids.insert(o->onode.nid); + } + for (auto& i : referenced) { + dout(20) << __func__ << " referenced 0x" << std::hex << i.second + << std::dec << " for " << *i.first << dendl; + const bluestore_blob_t& blob = i.first->get_blob(); + if (i.second & blob.unused) { + derr << "fsck error: " << oid << " blob claims unused 0x" + << std::hex << blob.unused + << " but extents reference 0x" << i.second << std::dec + << " on blob " << *i.first << dendl; + ++errors; + } + if (blob.has_csum()) { + uint64_t blob_len = blob.get_logical_length(); + uint64_t unused_chunk_size = blob_len / (sizeof(blob.unused) * 8); + unsigned csum_count = blob.get_csum_count(); + unsigned csum_chunk_size = blob.get_csum_chunk_size(); + for (unsigned p = 0; p < csum_count; ++p) { + unsigned pos = p * csum_chunk_size; + unsigned firstbit = pos / unused_chunk_size; // [firstbit,lastbit] + unsigned lastbit = (pos + csum_chunk_size - 1) / unused_chunk_size; + unsigned mask = 1u << firstbit; + for (unsigned b = firstbit + 1; b <= lastbit; ++b) { + mask |= 1u << b; + } + if ((blob.unused & mask) == mask) { + // this csum chunk region is marked unused + if (blob.get_csum_item(p) != 0) { + derr << "fsck error: " << oid + << " blob claims csum chunk 0x" << std::hex << pos + << "~" << csum_chunk_size + << " is unused (mask 0x" << mask << " of unused 0x" + << blob.unused << ") but csum is non-zero 0x" + << blob.get_csum_item(p) << std::dec << " on blob " + << *i.first << dendl; + ++errors; + } + } + } + } + } + // omap + if (o->onode.has_omap()) { + ceph_assert(ctx.used_omap_head); + if (ctx.used_omap_head->count(o->onode.nid)) { + derr << "fsck error: " << o->oid << " omap_head " << o->onode.nid + << " already in use" << dendl; + ++errors; + } else { + ctx.used_omap_head->insert(o->onode.nid); + } + } // if (o->onode.has_omap()) + if (depth == FSCK_DEEP) { + bufferlist bl; + uint64_t max_read_block = cct->_conf->bluestore_fsck_read_bytes_cap; + uint64_t offset = 0; + do { + uint64_t l = std::min(uint64_t(o->onode.size - offset), max_read_block); + int r = _do_read(c.get(), o, offset, l, bl, + CEPH_OSD_OP_FLAG_FADVISE_NOCACHE); + if (r < 0) { + ++errors; + derr << "fsck error: " << oid << std::hex + << " error during read: " + << " " << offset << "~" << l + << " " << cpp_strerror(r) << std::dec + << dendl; + break; + } + offset += l; + } while (offset < o->onode.size); + } // deep + } //if (depth != FSCK_SHALLOW) + } // for (it->lower_bound(string()); it->valid(); it->next()) + if (depth == FSCK_SHALLOW && thread_count > 0) { + wq->finalize(thread_pool, ctx); + if (processed_myself) { + // may be needs more threads? + dout(0) << __func__ << " partial offload" + << ", done myself " << processed_myself + << " of " << ctx.num_objects + << "objects, threads " << thread_count + << dendl; + } + } + } // if (it) +} +/** +An overview for currently implemented repair logics +performed in fsck in two stages: detection(+preparation) and commit. +Detection stage (in processing order): + (Issue -> Repair action to schedule) + - Detect undecodable keys for Shared Blobs -> Remove + - Detect undecodable records for Shared Blobs -> Remove + (might trigger missed Shared Blob detection below) + - Detect stray records for Shared Blobs -> Remove + - Detect misreferenced pextents -> Fix + Prepare Bloom-like filter to track cid/oid -> pextent + Prepare list of extents that are improperly referenced + Enumerate Onode records that might use 'misreferenced' pextents + (Bloom-like filter applied to reduce computation) + Per each questinable Onode enumerate all blobs and identify broken ones + (i.e. blobs having 'misreferences') + Rewrite each broken blob data by allocating another extents and + copying data there + If blob is shared - unshare it and mark corresponding Shared Blob + for removal + Release previously allocated space + Update Extent Map + - Detect missed Shared Blobs -> Recreate + - Detect undecodable deferred transaction -> Remove + - Detect Freelist Manager's 'false free' entries -> Mark as used + - Detect Freelist Manager's leaked entries -> Mark as free + - Detect statfs inconsistency - Update + Commit stage (separate DB commit per each step): + - Apply leaked FM entries fix + - Apply 'false free' FM entries fix + - Apply 'Remove' actions + - Apply fix for misreference pextents + - Apply Shared Blob recreate + (can be merged with the step above if misreferences were dectected) + - Apply StatFS update +*/ +int BlueStore::_fsck(BlueStore::FSCKDepth depth, bool repair) +{ + dout(1) << __func__ + << (repair ? " repair" : " check") + << (depth == FSCK_DEEP ? " (deep)" : + depth == FSCK_SHALLOW ? " (shallow)" : " (regular)") + << dendl; + + // in deep mode we need R/W write access to be able to replay deferred ops + bool read_only = !(repair || depth == FSCK_DEEP); + + int r = _open_db_and_around(read_only); + if (r < 0) + return r; + + if (!read_only) { + r = _upgrade_super(); + if (r < 0) { + goto out_db; + } + } + + r = _open_collections(); + if (r < 0) + goto out_db; + + mempool_thread.init(); + + // we need finisher and kv_{sync,finalize}_thread *just* for replay + // enable in repair or deep mode modes only + if (!read_only) { + _kv_start(); + r = _deferred_replay(); + _kv_stop(); + } + if (r < 0) + goto out_scan; + + r = _fsck_on_open(depth, repair); + +out_scan: + mempool_thread.shutdown(); + _shutdown_cache(); +out_db: + _close_db_and_around(false); + + return r; +} + +int BlueStore::_fsck_on_open(BlueStore::FSCKDepth depth, bool repair) +{ + uint64_t sb_hash_size = uint64_t( + cct->_conf.get_val<Option::size_t>("osd_memory_target") * + cct->_conf.get_val<double>( + "bluestore_fsck_shared_blob_tracker_size")); + + dout(1) << __func__ + << " <<<START>>>" + << (repair ? " repair" : " check") + << (depth == FSCK_DEEP ? " (deep)" : + depth == FSCK_SHALLOW ? " (shallow)" : " (regular)") + << " start sb_tracker_hash_size:" << sb_hash_size + << dendl; + int64_t errors = 0; + int64_t warnings = 0; + unsigned repaired = 0; + + uint64_t_btree_t used_omap_head; + uint64_t_btree_t used_sbids; + + mempool_dynamic_bitset used_blocks, bluefs_used_blocks; + KeyValueDB::Iterator it; + store_statfs_t expected_store_statfs, actual_statfs; + per_pool_statfs expected_pool_statfs; + + sb_info_space_efficient_map_t sb_info; + shared_blob_2hash_tracker_t sb_ref_counts( + sb_hash_size, + min_alloc_size); + size_t sb_ref_mismatches = 0; + + uint64_t num_objects = 0; + uint64_t num_extents = 0; + uint64_t num_blobs = 0; + uint64_t num_spanning_blobs = 0; + uint64_t num_shared_blobs = 0; + uint64_t num_sharded_objects = 0; + BlueStoreRepairer repairer; + + auto alloc_size = fm->get_alloc_size(); + + utime_t start = ceph_clock_now(); + + _fsck_collections(&errors); + used_blocks.resize(fm->get_alloc_units()); + + if (bluefs) { + interval_set<uint64_t> bluefs_extents; + + int r = bluefs->get_block_extents(bluefs_layout.shared_bdev, &bluefs_extents); + ceph_assert(r == 0); + for (auto [start, len] : bluefs_extents) { + apply_for_bitset_range(start, len, alloc_size, used_blocks, + [&](uint64_t pos, mempool_dynamic_bitset& bs) { + ceph_assert(pos < bs.size()); + bs.set(pos); + } + ); + } + } + + bluefs_used_blocks = used_blocks; + + apply_for_bitset_range( + 0, std::max<uint64_t>(min_alloc_size, SUPER_RESERVED), alloc_size, used_blocks, + [&](uint64_t pos, mempool_dynamic_bitset &bs) { + bs.set(pos); + } + ); + + + if (repair) { + repairer.init_space_usage_tracker( + bdev->get_size(), + min_alloc_size); + } + + if (bluefs) { + int r = bluefs->fsck(); + if (r < 0) { + return r; + } + if (r > 0) + errors += r; + } + + if (!per_pool_stat_collection) { + const char *w; + if (cct->_conf->bluestore_fsck_error_on_no_per_pool_stats) { + w = "error"; + ++errors; + } else { + w = "warning"; + ++warnings; + } + derr << "fsck " << w << ": store not yet converted to per-pool stats" + << dendl; + } + if (per_pool_omap != OMAP_PER_PG) { + const char *w; + if (cct->_conf->bluestore_fsck_error_on_no_per_pool_omap) { + w = "error"; + ++errors; + } else { + w = "warning"; + ++warnings; + } + derr << "fsck " << w << ": store not yet converted to per-pg omap" + << dendl; + } + + // get expected statfs; reset unaffected fields to be able to compare + // structs + statfs(&actual_statfs); + actual_statfs.total = 0; + actual_statfs.internally_reserved = 0; + actual_statfs.available = 0; + actual_statfs.internal_metadata = 0; + actual_statfs.omap_allocated = 0; + + if (g_conf()->bluestore_debug_fsck_abort) { + dout(1) << __func__ << " debug abort" << dendl; + goto out_scan; + } + + dout(1) << __func__ << " checking shared_blobs (phase 1)" << dendl; + it = db->get_iterator(PREFIX_SHARED_BLOB, KeyValueDB::ITERATOR_NOCACHE); + if (it) { + for (it->lower_bound(string()); it->valid(); it->next()) { + string key = it->key(); + uint64_t sbid; + if (get_key_shared_blob(key, &sbid) < 0) { + // Failed to parse the key. + // This gonna to be handled at the second stage + continue; + } + bluestore_shared_blob_t shared_blob(sbid); + bufferlist bl = it->value(); + auto blp = bl.cbegin(); + try { + decode(shared_blob, blp); + } + catch (ceph::buffer::error& e) { + // this gonna to be handled at the second stage + continue; + } + dout(20) << __func__ << " " << shared_blob << dendl; + auto& sbi = sb_info.add_maybe_stray(sbid); + + // primarily to silent the 'unused' warning + ceph_assert(sbi.pool_id == sb_info_t::INVALID_POOL_ID); + + for (auto& r : shared_blob.ref_map.ref_map) { + sb_ref_counts.inc_range( + sbid, + r.first, + r.second.length, + -r.second.refs); + } + } + } // if (it) //checking shared_blobs (phase1) + + // walk PREFIX_OBJ + { + dout(1) << __func__ << " walking object keyspace" << dendl; + ceph::mutex sb_info_lock = ceph::make_mutex("BlueStore::fsck::sbinfo_lock"); + BlueStore::FSCK_ObjectCtx ctx( + errors, + warnings, + num_objects, + num_extents, + num_blobs, + num_sharded_objects, + num_spanning_blobs, + &used_blocks, + &used_omap_head, + //no need for the below lock when in non-shallow mode as + // there is no multithreading in this case + depth == FSCK_SHALLOW ? &sb_info_lock : nullptr, + sb_info, + sb_ref_counts, + expected_store_statfs, + expected_pool_statfs, + repair ? &repairer : nullptr); + + _fsck_check_objects(depth, ctx); + } + + sb_ref_mismatches = sb_ref_counts.count_non_zero(); + if (sb_ref_mismatches != 0) { + derr << "fsck error: shared blob references aren't matching, at least " + << sb_ref_mismatches << " found" << dendl; + errors += sb_ref_mismatches; + } + + if (depth != FSCK_SHALLOW && repair) { + _fsck_repair_shared_blobs(repairer, sb_ref_counts, sb_info); + } + dout(1) << __func__ << " checking shared_blobs (phase 2)" << dendl; + it = db->get_iterator(PREFIX_SHARED_BLOB, KeyValueDB::ITERATOR_NOCACHE); + if (it) { + // FIXME minor: perhaps simplify for shallow mode? + // fill global if not overriden below + auto expected_statfs = &expected_store_statfs; + for (it->lower_bound(string()); it->valid(); it->next()) { + string key = it->key(); + uint64_t sbid; + if (get_key_shared_blob(key, &sbid)) { + derr << "fsck error: bad key '" << key + << "' in shared blob namespace" << dendl; + if (repair) { + repairer.remove_key(db, PREFIX_SHARED_BLOB, key); + } + ++errors; + continue; + } + auto p = sb_info.find(sbid); + if (p == sb_info.end()) { + if (sb_ref_mismatches > 0) { + // highly likely this has been already reported before, ignoring... + dout(5) << __func__ << " found duplicate(?) stray shared blob data for sbid 0x" + << std::hex << sbid << std::dec << dendl; + } else { + derr<< "fsck error: found stray shared blob data for sbid 0x" + << std::hex << sbid << std::dec << dendl; + ++errors; + if (repair) { + repairer.remove_key(db, PREFIX_SHARED_BLOB, key); + } + } + } else { + ++num_shared_blobs; + sb_info_t& sbi = *p; + bluestore_shared_blob_t shared_blob(sbid); + bufferlist bl = it->value(); + auto blp = bl.cbegin(); + try { + decode(shared_blob, blp); + } + catch (ceph::buffer::error& e) { + ++errors; + + derr << "fsck error: failed to decode Shared Blob" + << pretty_binary_string(key) << dendl; + if (repair) { + dout(20) << __func__ << " undecodable Shared Blob, key:'" + << pretty_binary_string(key) + << "', removing" << dendl; + repairer.remove_key(db, PREFIX_SHARED_BLOB, key); + } + continue; + } + dout(20) << __func__ << " " << shared_blob << dendl; + PExtentVector extents; + for (auto& r : shared_blob.ref_map.ref_map) { + extents.emplace_back(bluestore_pextent_t(r.first, r.second.length)); + } + if (sbi.pool_id != sb_info_t::INVALID_POOL_ID && + (per_pool_stat_collection || repair)) { + expected_statfs = &expected_pool_statfs[sbi.pool_id]; + } + std::stringstream ss; + ss << "sbid 0x" << std::hex << sbid << std::dec; + errors += _fsck_check_extents(ss.str(), + extents, + sbi.allocated_chunks < 0, + used_blocks, + fm->get_alloc_size(), + repair ? &repairer : nullptr, + *expected_statfs, + depth); + } + } + } // if (it) /* checking shared_blobs (phase 2)*/ + + if (repair && repairer.preprocess_misreference(db)) { + + dout(1) << __func__ << " sorting out misreferenced extents" << dendl; + auto& misref_extents = repairer.get_misreferences(); + interval_set<uint64_t> to_release; + it = db->get_iterator(PREFIX_OBJ, KeyValueDB::ITERATOR_NOCACHE); + if (it) { + // fill global if not overriden below + auto expected_statfs = &expected_store_statfs; + + CollectionRef c; + spg_t pgid; + KeyValueDB::Transaction txn = repairer.get_fix_misreferences_txn(); + bool bypass_rest = false; + for (it->lower_bound(string()); it->valid() && !bypass_rest; + it->next()) { + dout(30) << __func__ << " key " + << pretty_binary_string(it->key()) << dendl; + if (is_extent_shard_key(it->key())) { + continue; + } + + ghobject_t oid; + int r = get_key_object(it->key(), &oid); + if (r < 0 || !repairer.is_used(oid)) { + continue; + } + + if (!c || + oid.shard_id != pgid.shard || + oid.hobj.get_logical_pool() != (int64_t)pgid.pool() || + !c->contains(oid)) { + c = nullptr; + for (auto& p : coll_map) { + if (p.second->contains(oid)) { + c = p.second; + break; + } + } + if (!c) { + continue; + } + if (per_pool_stat_collection || repair) { + auto pool_id = c->cid.is_pg(&pgid) ? pgid.pool() : META_POOL_ID; + expected_statfs = &expected_pool_statfs[pool_id]; + } + } + if (!repairer.is_used(c->cid)) { + continue; + } + + dout(20) << __func__ << " check misreference for col:" << c->cid + << " obj:" << oid << dendl; + + OnodeRef o; + o.reset(Onode::decode(c, oid, it->key(), it->value())); + o->extent_map.fault_range(db, 0, OBJECT_MAX_SIZE); + mempool::bluestore_fsck::set<BlobRef> blobs; + + for (auto& e : o->extent_map.extent_map) { + blobs.insert(e.blob); + } + bool need_onode_update = false; + bool first_dump = true; + for(auto b : blobs) { + bool broken_blob = false; + auto& pextents = b->dirty_blob().dirty_extents(); + for (auto& e : pextents) { + if (!e.is_valid()) { + continue; + } + // for the sake of simplicity and proper shared blob handling + // always rewrite the whole blob even when it's partially + // misreferenced. + if (misref_extents.intersects(e.offset, e.length)) { + if (first_dump) { + first_dump = false; + _dump_onode<10>(cct, *o); + } + broken_blob = true; + break; + } + } + if (!broken_blob) + continue; + bool compressed = b->get_blob().is_compressed(); + need_onode_update = true; + dout(10) << __func__ + << " fix misreferences in oid:" << oid + << " " << *b << dendl; + uint64_t b_off = 0; + PExtentVector pext_to_release; + pext_to_release.reserve(pextents.size()); + // rewriting all valid pextents + for (auto e = pextents.begin(); e != pextents.end(); + e++) { + auto b_off_cur = b_off; + b_off += e->length; + if (!e->is_valid()) { + continue; + } + PExtentVector exts; + int64_t alloc_len = + shared_alloc.a->allocate(e->length, min_alloc_size, + 0, 0, &exts); + if (alloc_len < 0 || alloc_len < (int64_t)e->length) { + derr << __func__ + << " failed to allocate 0x" << std::hex << e->length + << " allocated 0x " << (alloc_len < 0 ? 0 : alloc_len) + << " min_alloc_size 0x" << min_alloc_size + << " available 0x " << shared_alloc.a->get_free() + << std::dec << dendl; + if (alloc_len > 0) { + shared_alloc.a->release(exts); + } + bypass_rest = true; + break; + } + expected_statfs->allocated += e->length; + if (compressed) { + expected_statfs->data_compressed_allocated += e->length; + } + + bufferlist bl; + IOContext ioc(cct, NULL, true); // allow EIO + r = bdev->read(e->offset, e->length, &bl, &ioc, false); + if (r < 0) { + derr << __func__ << " failed to read from 0x" << std::hex << e->offset + <<"~" << e->length << std::dec << dendl; + ceph_abort_msg("read failed, wtf"); + } + pext_to_release.push_back(*e); + e = pextents.erase(e); + e = pextents.insert(e, exts.begin(), exts.end()); + b->get_blob().map_bl( + b_off_cur, + bl, + [&](uint64_t offset, bufferlist& t) { + int r = bdev->write(offset, t, false); + ceph_assert(r == 0); + }); + e += exts.size() - 1; + for (auto& p : exts) { + fm->allocate(p.offset, p.length, txn); + } + } // for (auto e = pextents.begin(); e != pextents.end(); e++) { + + if (b->get_blob().is_shared()) { + b->dirty_blob().clear_flag(bluestore_blob_t::FLAG_SHARED); + + auto sbid = b->shared_blob->get_sbid(); + auto sb_it = sb_info.find(sbid); + ceph_assert(sb_it != sb_info.end()); + sb_info_t& sbi = *sb_it; + + if (sbi.allocated_chunks < 0) { + // NB: it's crucial to use compressed_allocated_chunks from sb_info_t + // as we originally used that value while accumulating + // expected_statfs + expected_statfs->allocated -= uint64_t(-sbi.allocated_chunks) << min_alloc_size_order; + expected_statfs->data_compressed_allocated -= + uint64_t(-sbi.allocated_chunks) << min_alloc_size_order; + } else { + expected_statfs->allocated -= uint64_t(sbi.allocated_chunks) << min_alloc_size_order; + } + sbi.allocated_chunks = 0; + repairer.fix_shared_blob(txn, sbid, nullptr, 0); + + // relying on blob's pextents to decide what to release. + for (auto& p : pext_to_release) { + to_release.union_insert(p.offset, p.length); + } + } else { + for (auto& p : pext_to_release) { + expected_statfs->allocated -= p.length; + if (compressed) { + expected_statfs->data_compressed_allocated -= p.length; + } + to_release.union_insert(p.offset, p.length); + } + } + if (bypass_rest) { + break; + } + } // for(auto b : blobs) + if (need_onode_update) { + o->extent_map.dirty_range(0, OBJECT_MAX_SIZE); + _record_onode(o, txn); + } + } // for (it->lower_bound(string()); it->valid(); it->next()) + + for (auto it = to_release.begin(); it != to_release.end(); ++it) { + dout(10) << __func__ << " release 0x" << std::hex << it.get_start() + << "~" << it.get_len() << std::dec << dendl; + fm->release(it.get_start(), it.get_len(), txn); + } + shared_alloc.a->release(to_release); + to_release.clear(); + } // if (it) { + } //if (repair && repairer.preprocess_misreference()) { + sb_info.clear(); + sb_ref_counts.reset(); + + // check global stats only if fscking (not repairing) w/o per-pool stats + if (!per_pool_stat_collection && + !repair && + !(actual_statfs == expected_store_statfs)) { + derr << "fsck error: actual " << actual_statfs + << " != expected " << expected_store_statfs << dendl; + if (repair) { + repairer.fix_statfs(db, BLUESTORE_GLOBAL_STATFS_KEY, + expected_store_statfs); + } + ++errors; + } + + dout(1) << __func__ << " checking pool_statfs" << dendl; + _fsck_check_pool_statfs(expected_pool_statfs, + errors, warnings, repair ? &repairer : nullptr); + + if (depth != FSCK_SHALLOW) { + dout(1) << __func__ << " checking for stray omap data " << dendl; + it = db->get_iterator(PREFIX_OMAP, KeyValueDB::ITERATOR_NOCACHE); + if (it) { + uint64_t last_omap_head = 0; + for (it->lower_bound(string()); it->valid(); it->next()) { + uint64_t omap_head; + + _key_decode_u64(it->key().c_str(), &omap_head); + + if (used_omap_head.count(omap_head) == 0 && + omap_head != last_omap_head) { + fsck_derr(errors, MAX_FSCK_ERROR_LINES) + << "fsck error: found stray omap data on omap_head " + << omap_head << " " << last_omap_head << " " << used_omap_head.count(omap_head) << fsck_dendl; + ++errors; + last_omap_head = omap_head; + } + } + } + it = db->get_iterator(PREFIX_PGMETA_OMAP, KeyValueDB::ITERATOR_NOCACHE); + if (it) { + uint64_t last_omap_head = 0; + for (it->lower_bound(string()); it->valid(); it->next()) { + uint64_t omap_head; + _key_decode_u64(it->key().c_str(), &omap_head); + if (used_omap_head.count(omap_head) == 0 && + omap_head != last_omap_head) { + fsck_derr(errors, MAX_FSCK_ERROR_LINES) + << "fsck error: found stray (pgmeta) omap data on omap_head " + << omap_head << " " << last_omap_head << " " << used_omap_head.count(omap_head) << fsck_dendl; + last_omap_head = omap_head; + ++errors; + } + } + } + it = db->get_iterator(PREFIX_PERPOOL_OMAP, KeyValueDB::ITERATOR_NOCACHE); + if (it) { + uint64_t last_omap_head = 0; + for (it->lower_bound(string()); it->valid(); it->next()) { + uint64_t pool; + uint64_t omap_head; + string k = it->key(); + const char *c = k.c_str(); + c = _key_decode_u64(c, &pool); + c = _key_decode_u64(c, &omap_head); + if (used_omap_head.count(omap_head) == 0 && + omap_head != last_omap_head) { + fsck_derr(errors, MAX_FSCK_ERROR_LINES) + << "fsck error: found stray (per-pool) omap data on omap_head " + << omap_head << " " << last_omap_head << " " << used_omap_head.count(omap_head) << fsck_dendl; + ++errors; + last_omap_head = omap_head; + } + } + } + it = db->get_iterator(PREFIX_PERPG_OMAP, KeyValueDB::ITERATOR_NOCACHE); + if (it) { + uint64_t last_omap_head = 0; + for (it->lower_bound(string()); it->valid(); it->next()) { + uint64_t pool; + uint32_t hash; + uint64_t omap_head; + string k = it->key(); + const char* c = k.c_str(); + c = _key_decode_u64(c, &pool); + c = _key_decode_u32(c, &hash); + c = _key_decode_u64(c, &omap_head); + if (used_omap_head.count(omap_head) == 0 && + omap_head != last_omap_head) { + fsck_derr(errors, MAX_FSCK_ERROR_LINES) + << "fsck error: found stray (per-pg) omap data on omap_head " + << omap_head << " " << last_omap_head << " " << used_omap_head.count(omap_head) << fsck_dendl; + ++errors; + last_omap_head = omap_head; + } + } + } + dout(1) << __func__ << " checking deferred events" << dendl; + it = db->get_iterator(PREFIX_DEFERRED, KeyValueDB::ITERATOR_NOCACHE); + if (it) { + for (it->lower_bound(string()); it->valid(); it->next()) { + bufferlist bl = it->value(); + auto p = bl.cbegin(); + bluestore_deferred_transaction_t wt; + try { + decode(wt, p); + } catch (ceph::buffer::error& e) { + derr << "fsck error: failed to decode deferred txn " + << pretty_binary_string(it->key()) << dendl; + if (repair) { + dout(20) << __func__ << " undecodable deferred TXN record, key: '" + << pretty_binary_string(it->key()) + << "', removing" << dendl; + repairer.remove_key(db, PREFIX_DEFERRED, it->key()); + } + continue; + } + dout(20) << __func__ << " deferred " << wt.seq + << " ops " << wt.ops.size() + << " released 0x" << std::hex << wt.released << std::dec << dendl; + for (auto e = wt.released.begin(); e != wt.released.end(); ++e) { + apply_for_bitset_range( + e.get_start(), e.get_len(), alloc_size, used_blocks, + [&](uint64_t pos, mempool_dynamic_bitset &bs) { + bs.set(pos); + } + ); + } + } + } + + dout(1) << __func__ << " checking freelist vs allocated" << dendl; + { + fm->enumerate_reset(); + uint64_t offset, length; + while (fm->enumerate_next(db, &offset, &length)) { + bool intersects = false; + apply_for_bitset_range( + offset, length, alloc_size, used_blocks, + [&](uint64_t pos, mempool_dynamic_bitset &bs) { + ceph_assert(pos < bs.size()); + if (bs.test(pos) && !bluefs_used_blocks.test(pos)) { + if (offset == SUPER_RESERVED && + length == min_alloc_size - SUPER_RESERVED) { + // this is due to the change just after luminous to min_alloc_size + // granularity allocations, and our baked in assumption at the top + // of _fsck that 0~round_up_to(SUPER_RESERVED,min_alloc_size) is used + // (vs luminous's round_up_to(SUPER_RESERVED,block_size)). harmless, + // since we will never allocate this region below min_alloc_size. + dout(10) << __func__ << " ignoring free extent between SUPER_RESERVED" + << " and min_alloc_size, 0x" << std::hex << offset << "~" + << length << std::dec << dendl; + } else { + intersects = true; + if (repair) { + repairer.fix_false_free(db, fm, + pos * min_alloc_size, + min_alloc_size); + } + } + } else { + bs.set(pos); + } + } + ); + if (intersects) { + derr << "fsck error: free extent 0x" << std::hex << offset + << "~" << length << std::dec + << " intersects allocated blocks" << dendl; + ++errors; + } + } + fm->enumerate_reset(); + size_t count = used_blocks.count(); + if (used_blocks.size() != count) { + ceph_assert(used_blocks.size() > count); + used_blocks.flip(); + size_t start = used_blocks.find_first(); + while (start != decltype(used_blocks)::npos) { + size_t cur = start; + while (true) { + size_t next = used_blocks.find_next(cur); + if (next != cur + 1) { + ++errors; + derr << "fsck error: leaked extent 0x" << std::hex + << ((uint64_t)start * fm->get_alloc_size()) << "~" + << ((cur + 1 - start) * fm->get_alloc_size()) << std::dec + << dendl; + if (repair) { + repairer.fix_leaked(db, + fm, + start * min_alloc_size, + (cur + 1 - start) * min_alloc_size); + } + start = next; + break; + } + cur = next; + } + } + used_blocks.flip(); + } + } + } + if (repair) { + if (per_pool_omap != OMAP_PER_PG) { + dout(5) << __func__ << " fixing per_pg_omap" << dendl; + repairer.fix_per_pool_omap(db, OMAP_PER_PG); + } + + dout(5) << __func__ << " applying repair results" << dendl; + repaired = repairer.apply(db); + dout(5) << __func__ << " repair applied" << dendl; + } + +out_scan: + dout(2) << __func__ << " " << num_objects << " objects, " + << num_sharded_objects << " of them sharded. " + << dendl; + dout(2) << __func__ << " " << num_extents << " extents to " + << num_blobs << " blobs, " + << num_spanning_blobs << " spanning, " + << num_shared_blobs << " shared." + << dendl; + + utime_t duration = ceph_clock_now() - start; + dout(1) << __func__ << " <<<FINISH>>> with " << errors << " errors, " + << warnings << " warnings, " + << repaired << " repaired, " + << (errors + warnings - (int)repaired) << " remaining in " + << duration << " seconds" << dendl; + + // In non-repair mode we should return error count only as + // it indicates if store status is OK. + // In repair mode both errors and warnings are taken into account + // since repaired counter relates to them both. + return repair ? errors + warnings - (int)repaired : errors; +} + +/// methods to inject various errors fsck can repair +void BlueStore::inject_broken_shared_blob_key(const string& key, + const bufferlist& bl) +{ + KeyValueDB::Transaction txn; + txn = db->get_transaction(); + txn->set(PREFIX_SHARED_BLOB, key, bl); + db->submit_transaction_sync(txn); +}; + +void BlueStore::inject_no_shared_blob_key() +{ + KeyValueDB::Transaction txn; + txn = db->get_transaction(); + ceph_assert(blobid_last > 0); + // kill the last used sbid, this can be broken due to blobid preallocation + // in rare cases, leaving as-is for the sake of simplicity + uint64_t sbid = blobid_last; + + string key; + dout(5) << __func__<< " " << sbid << dendl; + get_shared_blob_key(sbid, &key); + txn->rmkey(PREFIX_SHARED_BLOB, key); + db->submit_transaction_sync(txn); +}; + +void BlueStore::inject_stray_shared_blob_key(uint64_t sbid) +{ + KeyValueDB::Transaction txn; + txn = db->get_transaction(); + + dout(5) << __func__ << " " << sbid << dendl; + + string key; + get_shared_blob_key(sbid, &key); + bluestore_shared_blob_t persistent(sbid); + persistent.ref_map.get(0xdead0000, 0x1000); + bufferlist bl; + encode(persistent, bl); + dout(20) << __func__ << " sbid " << sbid + << " takes " << bl.length() << " bytes, updating" + << dendl; + + txn->set(PREFIX_SHARED_BLOB, key, bl); + db->submit_transaction_sync(txn); +}; + + +void BlueStore::inject_leaked(uint64_t len) +{ + KeyValueDB::Transaction txn; + txn = db->get_transaction(); + + PExtentVector exts; + int64_t alloc_len = shared_alloc.a->allocate(len, min_alloc_size, + min_alloc_size * 256, 0, &exts); + ceph_assert(alloc_len >= (int64_t)len); + for (auto& p : exts) { + fm->allocate(p.offset, p.length, txn); + } + db->submit_transaction_sync(txn); +} + +void BlueStore::inject_false_free(coll_t cid, ghobject_t oid) +{ + KeyValueDB::Transaction txn; + OnodeRef o; + CollectionRef c = _get_collection(cid); + ceph_assert(c); + { + std::unique_lock l{c->lock}; // just to avoid internal asserts + o = c->get_onode(oid, false); + ceph_assert(o); + o->extent_map.fault_range(db, 0, OBJECT_MAX_SIZE); + } + + bool injected = false; + txn = db->get_transaction(); + auto& em = o->extent_map.extent_map; + std::vector<const PExtentVector*> v; + if (em.size()) { + v.push_back(&em.begin()->blob->get_blob().get_extents()); + } + if (em.size() > 1) { + auto it = em.end(); + --it; + v.push_back(&(it->blob->get_blob().get_extents())); + } + for (auto pext : v) { + if (pext->size()) { + auto p = pext->begin(); + while (p != pext->end()) { + if (p->is_valid()) { + dout(20) << __func__ << " release 0x" << std::hex << p->offset + << "~" << p->length << std::dec << dendl; + fm->release(p->offset, p->length, txn); + injected = true; + break; + } + ++p; + } + } + } + ceph_assert(injected); + db->submit_transaction_sync(txn); +} + +void BlueStore::inject_legacy_omap() +{ + dout(1) << __func__ << dendl; + per_pool_omap = OMAP_BULK; + KeyValueDB::Transaction txn; + txn = db->get_transaction(); + txn->rmkey(PREFIX_SUPER, "per_pool_omap"); + db->submit_transaction_sync(txn); +} + +void BlueStore::inject_legacy_omap(coll_t cid, ghobject_t oid) +{ + dout(1) << __func__ << " " + << cid << " " << oid + <<dendl; + KeyValueDB::Transaction txn; + OnodeRef o; + CollectionRef c = _get_collection(cid); + ceph_assert(c); + { + std::unique_lock l{ c->lock }; // just to avoid internal asserts + o = c->get_onode(oid, false); + ceph_assert(o); + } + o->onode.clear_flag( + bluestore_onode_t::FLAG_PERPG_OMAP | + bluestore_onode_t::FLAG_PERPOOL_OMAP | + bluestore_onode_t::FLAG_PGMETA_OMAP); + txn = db->get_transaction(); + _record_onode(o, txn); + db->submit_transaction_sync(txn); +} + + +void BlueStore::inject_statfs(const string& key, const store_statfs_t& new_statfs) +{ + BlueStoreRepairer repairer; + repairer.fix_statfs(db, key, new_statfs); + repairer.apply(db); +} + +void BlueStore::inject_global_statfs(const store_statfs_t& new_statfs) +{ + KeyValueDB::Transaction t = db->get_transaction(); + volatile_statfs v; + v = new_statfs; + bufferlist bl; + v.encode(bl); + t->set(PREFIX_STAT, BLUESTORE_GLOBAL_STATFS_KEY, bl); + db->submit_transaction_sync(t); +} + +void BlueStore::inject_misreference(coll_t cid1, ghobject_t oid1, + coll_t cid2, ghobject_t oid2, + uint64_t offset) +{ + OnodeRef o1; + CollectionRef c1 = _get_collection(cid1); + ceph_assert(c1); + { + std::unique_lock l{c1->lock}; // just to avoid internal asserts + o1 = c1->get_onode(oid1, false); + ceph_assert(o1); + o1->extent_map.fault_range(db, offset, OBJECT_MAX_SIZE); + } + OnodeRef o2; + CollectionRef c2 = _get_collection(cid2); + ceph_assert(c2); + { + std::unique_lock l{c2->lock}; // just to avoid internal asserts + o2 = c2->get_onode(oid2, false); + ceph_assert(o2); + o2->extent_map.fault_range(db, offset, OBJECT_MAX_SIZE); + } + Extent& e1 = *(o1->extent_map.seek_lextent(offset)); + Extent& e2 = *(o2->extent_map.seek_lextent(offset)); + + // require onode/extent layout to be the same (and simple) + // to make things easier + ceph_assert(o1->onode.extent_map_shards.empty()); + ceph_assert(o2->onode.extent_map_shards.empty()); + ceph_assert(o1->extent_map.spanning_blob_map.size() == 0); + ceph_assert(o2->extent_map.spanning_blob_map.size() == 0); + ceph_assert(e1.logical_offset == e2.logical_offset); + ceph_assert(e1.length == e2.length); + ceph_assert(e1.blob_offset == e2.blob_offset); + + KeyValueDB::Transaction txn; + txn = db->get_transaction(); + + // along with misreference error this will create space leaks errors + e2.blob->dirty_blob() = e1.blob->get_blob(); + o2->extent_map.dirty_range(offset, e2.length); + o2->extent_map.update(txn, false); + + _record_onode(o2, txn); + db->submit_transaction_sync(txn); +} + +void BlueStore::inject_zombie_spanning_blob(coll_t cid, ghobject_t oid, + int16_t blob_id) +{ + OnodeRef o; + CollectionRef c = _get_collection(cid); + ceph_assert(c); + { + std::unique_lock l{ c->lock }; // just to avoid internal asserts + o = c->get_onode(oid, false); + ceph_assert(o); + o->extent_map.fault_range(db, 0, OBJECT_MAX_SIZE); + } + + BlobRef b = c->new_blob(); + b->id = blob_id; + o->extent_map.spanning_blob_map[blob_id] = b; + + KeyValueDB::Transaction txn; + txn = db->get_transaction(); + + _record_onode(o, txn); + db->submit_transaction_sync(txn); +} + +void BlueStore::inject_bluefs_file(std::string_view dir, std::string_view name, size_t new_size) +{ + ceph_assert(bluefs); + + BlueFS::FileWriter* p_handle = nullptr; + auto ret = bluefs->open_for_write(dir, name, &p_handle, false); + ceph_assert(ret == 0); + + std::string s('0', new_size); + bufferlist bl; + bl.append(s); + p_handle->append(bl); + + bluefs->fsync(p_handle); + bluefs->close_writer(p_handle); +} + +void BlueStore::collect_metadata(map<string,string> *pm) +{ + dout(10) << __func__ << dendl; + bdev->collect_metadata("bluestore_bdev_", pm); + if (bluefs) { + (*pm)["bluefs"] = "1"; + // this value is for backward compatibility only + (*pm)["bluefs_single_shared_device"] = \ + stringify((int)bluefs_layout.single_shared_device()); + (*pm)["bluefs_dedicated_db"] = \ + stringify((int)bluefs_layout.dedicated_db); + (*pm)["bluefs_dedicated_wal"] = \ + stringify((int)bluefs_layout.dedicated_wal); + bluefs->collect_metadata(pm, bluefs_layout.shared_bdev); + } else { + (*pm)["bluefs"] = "0"; + } + + // report numa mapping for underlying devices + int node = -1; + set<int> nodes; + set<string> failed; + int r = get_numa_node(&node, &nodes, &failed); + if (r >= 0) { + if (!failed.empty()) { + (*pm)["objectstore_numa_unknown_devices"] = stringify(failed); + } + if (!nodes.empty()) { + dout(1) << __func__ << " devices span numa nodes " << nodes << dendl; + (*pm)["objectstore_numa_nodes"] = stringify(nodes); + } + if (node >= 0) { + (*pm)["objectstore_numa_node"] = stringify(node); + } + } +} + +int BlueStore::get_numa_node( + int *final_node, + set<int> *out_nodes, + set<string> *out_failed) +{ + int node = -1; + set<string> devices; + get_devices(&devices); + set<int> nodes; + set<string> failed; + for (auto& devname : devices) { + int n; + BlkDev bdev(devname); + int r = bdev.get_numa_node(&n); + if (r < 0) { + dout(10) << __func__ << " bdev " << devname << " can't detect numa_node" + << dendl; + failed.insert(devname); + continue; + } + dout(10) << __func__ << " bdev " << devname << " on numa_node " << n + << dendl; + nodes.insert(n); + if (node < 0) { + node = n; + } + } + if (node >= 0 && nodes.size() == 1 && failed.empty()) { + *final_node = node; + } + if (out_nodes) { + *out_nodes = nodes; + } + if (out_failed) { + *out_failed = failed; + } + return 0; +} + +int BlueStore::get_devices(set<string> *ls) +{ + if (bdev) { + bdev->get_devices(ls); + if (bluefs) { + bluefs->get_devices(ls); + } + return 0; + } + + // grumble, we haven't started up yet. + int r = _open_path(); + if (r < 0) + goto out; + r = _open_fsid(false); + if (r < 0) + goto out_path; + r = _read_fsid(&fsid); + if (r < 0) + goto out_fsid; + r = _lock_fsid(); + if (r < 0) + goto out_fsid; + r = _open_bdev(false); + if (r < 0) + goto out_fsid; + r = _minimal_open_bluefs(false); + if (r < 0) + goto out_bdev; + bdev->get_devices(ls); + if (bluefs) { + bluefs->get_devices(ls); + } + r = 0; + _minimal_close_bluefs(); + out_bdev: + _close_bdev(); + out_fsid: + _close_fsid(); + out_path: + _close_path(); + out: + return r; +} + +void BlueStore::_get_statfs_overall(struct store_statfs_t *buf) +{ + buf->reset(); + + auto prefix = per_pool_omap == OMAP_BULK ? + PREFIX_OMAP : + per_pool_omap == OMAP_PER_POOL ? + PREFIX_PERPOOL_OMAP : + PREFIX_PERPG_OMAP; + buf->omap_allocated = + db->estimate_prefix_size(prefix, string()); + + uint64_t bfree = shared_alloc.a->get_free(); + + if (bluefs) { + buf->internally_reserved = 0; + // include dedicated db, too, if that isn't the shared device. + if (bluefs_layout.shared_bdev != BlueFS::BDEV_DB) { + buf->total += bluefs->get_total(BlueFS::BDEV_DB); + } + // call any non-omap bluefs space "internal metadata" + buf->internal_metadata = + bluefs->get_used() + - buf->omap_allocated; + } + + uint64_t thin_total, thin_avail; + if (bdev->get_thin_utilization(&thin_total, &thin_avail)) { + buf->total += thin_total; + + // we are limited by both the size of the virtual device and the + // underlying physical device. + bfree = std::min(bfree, thin_avail); + + buf->allocated = thin_total - thin_avail; + } else { + buf->total += bdev->get_size(); + } + buf->available = bfree; +} + +int BlueStore::statfs(struct store_statfs_t *buf, + osd_alert_list_t* alerts) +{ + if (alerts) { + alerts->clear(); + _log_alerts(*alerts); + } + _get_statfs_overall(buf); + { + std::lock_guard l(vstatfs_lock); + buf->allocated = vstatfs.allocated(); + buf->data_stored = vstatfs.stored(); + buf->data_compressed = vstatfs.compressed(); + buf->data_compressed_original = vstatfs.compressed_original(); + buf->data_compressed_allocated = vstatfs.compressed_allocated(); + } + + dout(20) << __func__ << " " << *buf << dendl; + return 0; +} + +int BlueStore::pool_statfs(uint64_t pool_id, struct store_statfs_t *buf, + bool *out_per_pool_omap) +{ + dout(20) << __func__ << " pool " << pool_id<< dendl; + + if (!per_pool_stat_collection) { + dout(20) << __func__ << " not supported in legacy mode " << dendl; + return -ENOTSUP; + } + buf->reset(); + + { + std::lock_guard l(vstatfs_lock); + osd_pools[pool_id].publish(buf); + } + + string key_prefix; + _key_encode_u64(pool_id, &key_prefix); + *out_per_pool_omap = per_pool_omap != OMAP_BULK; + if (*out_per_pool_omap) { + auto prefix = per_pool_omap == OMAP_PER_POOL ? + PREFIX_PERPOOL_OMAP : + PREFIX_PERPG_OMAP; + buf->omap_allocated = db->estimate_prefix_size(prefix, key_prefix); + } + + dout(10) << __func__ << *buf << dendl; + return 0; +} + +void BlueStore::_check_legacy_statfs_alert() +{ + string s; + if (!per_pool_stat_collection && + cct->_conf->bluestore_warn_on_legacy_statfs) { + s = "legacy statfs reporting detected, " + "suggest to run store repair to get consistent statistic reports"; + } + std::lock_guard l(qlock); + legacy_statfs_alert = s; +} + +void BlueStore::_check_no_per_pg_or_pool_omap_alert() +{ + string per_pg, per_pool; + if (per_pool_omap != OMAP_PER_PG) { + if (cct->_conf->bluestore_warn_on_no_per_pg_omap) { + per_pg = "legacy (not per-pg) omap detected, " + "suggest to run store repair to benefit from faster PG removal"; + } + if (per_pool_omap != OMAP_PER_POOL) { + if (cct->_conf->bluestore_warn_on_no_per_pool_omap) { + per_pool = "legacy (not per-pool) omap detected, " + "suggest to run store repair to benefit from per-pool omap usage statistics"; + } + } + } + std::lock_guard l(qlock); + no_per_pg_omap_alert = per_pg; + no_per_pool_omap_alert = per_pool; +} + +// --------------- +// cache + +BlueStore::CollectionRef BlueStore::_get_collection(const coll_t& cid) +{ + std::shared_lock l(coll_lock); + ceph::unordered_map<coll_t,CollectionRef>::iterator cp = coll_map.find(cid); + if (cp == coll_map.end()) + return CollectionRef(); + return cp->second; +} + +void BlueStore::_queue_reap_collection(CollectionRef& c) +{ + dout(10) << __func__ << " " << c << " " << c->cid << dendl; + // _reap_collections and this in the same thread, + // so no need a lock. + removed_collections.push_back(c); +} + +void BlueStore::_reap_collections() +{ + + list<CollectionRef> removed_colls; + { + // _queue_reap_collection and this in the same thread. + // So no need a lock. + if (!removed_collections.empty()) + removed_colls.swap(removed_collections); + else + return; + } + + list<CollectionRef>::iterator p = removed_colls.begin(); + while (p != removed_colls.end()) { + CollectionRef c = *p; + dout(10) << __func__ << " " << c << " " << c->cid << dendl; + if (c->onode_map.map_any([&](Onode* o) { + ceph_assert(!o->exists); + if (o->flushing_count.load()) { + dout(10) << __func__ << " " << c << " " << c->cid << " " << o->oid + << " flush_txns " << o->flushing_count << dendl; + return true; + } + return false; + })) { + ++p; + continue; + } + c->onode_map.clear(); + p = removed_colls.erase(p); + dout(10) << __func__ << " " << c << " " << c->cid << " done" << dendl; + } + if (removed_colls.empty()) { + dout(10) << __func__ << " all reaped" << dendl; + } else { + removed_collections.splice(removed_collections.begin(), removed_colls); + } +} + +void BlueStore::_update_cache_logger() +{ + uint64_t num_onodes = 0; + uint64_t num_pinned_onodes = 0; + uint64_t num_extents = 0; + uint64_t num_blobs = 0; + uint64_t num_buffers = 0; + uint64_t num_buffer_bytes = 0; + for (auto c : onode_cache_shards) { + c->add_stats(&num_onodes, &num_pinned_onodes); + } + for (auto c : buffer_cache_shards) { + c->add_stats(&num_extents, &num_blobs, + &num_buffers, &num_buffer_bytes); + } + logger->set(l_bluestore_onodes, num_onodes); + logger->set(l_bluestore_pinned_onodes, num_pinned_onodes); + logger->set(l_bluestore_extents, num_extents); + logger->set(l_bluestore_blobs, num_blobs); + logger->set(l_bluestore_buffers, num_buffers); + logger->set(l_bluestore_buffer_bytes, num_buffer_bytes); +} + +// --------------- +// read operations + +ObjectStore::CollectionHandle BlueStore::open_collection(const coll_t& cid) +{ + return _get_collection(cid); +} + +ObjectStore::CollectionHandle BlueStore::create_new_collection( + const coll_t& cid) +{ + std::unique_lock l{coll_lock}; + auto c = ceph::make_ref<Collection>( + this, + onode_cache_shards[cid.hash_to_shard(onode_cache_shards.size())], + buffer_cache_shards[cid.hash_to_shard(buffer_cache_shards.size())], + cid); + new_coll_map[cid] = c; + _osr_attach(c.get()); + return c; +} + +void BlueStore::set_collection_commit_queue( + const coll_t& cid, + ContextQueue *commit_queue) +{ + if (commit_queue) { + std::shared_lock l(coll_lock); + if (coll_map.count(cid)) { + coll_map[cid]->commit_queue = commit_queue; + } else if (new_coll_map.count(cid)) { + new_coll_map[cid]->commit_queue = commit_queue; + } + } +} + + +bool BlueStore::exists(CollectionHandle &c_, const ghobject_t& oid) +{ + Collection *c = static_cast<Collection *>(c_.get()); + dout(10) << __func__ << " " << c->cid << " " << oid << dendl; + if (!c->exists) + return false; + + bool r = true; + + { + std::shared_lock l(c->lock); + OnodeRef o = c->get_onode(oid, false); + if (!o || !o->exists) + r = false; + } + + return r; +} + +int BlueStore::stat( + CollectionHandle &c_, + const ghobject_t& oid, + struct stat *st, + bool allow_eio) +{ + Collection *c = static_cast<Collection *>(c_.get()); + if (!c->exists) + return -ENOENT; + dout(10) << __func__ << " " << c->get_cid() << " " << oid << dendl; + + { + std::shared_lock l(c->lock); + OnodeRef o = c->get_onode(oid, false); + if (!o || !o->exists) + return -ENOENT; + st->st_size = o->onode.size; + st->st_blksize = 4096; + st->st_blocks = (st->st_size + st->st_blksize - 1) / st->st_blksize; + st->st_nlink = 1; + } + + int r = 0; + if (_debug_mdata_eio(oid)) { + r = -EIO; + derr << __func__ << " " << c->cid << " " << oid << " INJECT EIO" << dendl; + } + return r; +} +int BlueStore::set_collection_opts( + CollectionHandle& ch, + const pool_opts_t& opts) +{ + Collection *c = static_cast<Collection *>(ch.get()); + dout(15) << __func__ << " " << ch->cid << " options " << opts << dendl; + if (!c->exists) + return -ENOENT; + std::unique_lock l{c->lock}; + c->pool_opts = opts; + return 0; +} + +int BlueStore::read( + CollectionHandle &c_, + const ghobject_t& oid, + uint64_t offset, + size_t length, + bufferlist& bl, + uint32_t op_flags) +{ + auto start = mono_clock::now(); + Collection *c = static_cast<Collection *>(c_.get()); + const coll_t &cid = c->get_cid(); + dout(15) << __func__ << " " << cid << " " << oid + << " 0x" << std::hex << offset << "~" << length << std::dec + << dendl; + if (!c->exists) + return -ENOENT; + + bl.clear(); + int r; + { + std::shared_lock l(c->lock); + auto start1 = mono_clock::now(); + OnodeRef o = c->get_onode(oid, false); + log_latency("get_onode@read", + l_bluestore_read_onode_meta_lat, + mono_clock::now() - start1, + cct->_conf->bluestore_log_op_age); + if (!o || !o->exists) { + r = -ENOENT; + goto out; + } + + if (offset == length && offset == 0) + length = o->onode.size; + + r = _do_read(c, o, offset, length, bl, op_flags); + if (r == -EIO) { + logger->inc(l_bluestore_read_eio); + } + } + + out: + if (r >= 0 && _debug_data_eio(oid)) { + r = -EIO; + derr << __func__ << " " << c->cid << " " << oid << " INJECT EIO" << dendl; + } else if (oid.hobj.pool > 0 && /* FIXME, see #23029 */ + cct->_conf->bluestore_debug_random_read_err && + (rand() % (int)(cct->_conf->bluestore_debug_random_read_err * + 100.0)) == 0) { + dout(0) << __func__ << ": inject random EIO" << dendl; + r = -EIO; + } + dout(10) << __func__ << " " << cid << " " << oid + << " 0x" << std::hex << offset << "~" << length << std::dec + << " = " << r << dendl; + log_latency(__func__, + l_bluestore_read_lat, + mono_clock::now() - start, + cct->_conf->bluestore_log_op_age); + return r; +} + +void BlueStore::_read_cache( + OnodeRef o, + uint64_t offset, + size_t length, + int read_cache_policy, + ready_regions_t& ready_regions, + blobs2read_t& blobs2read) +{ + // build blob-wise list to of stuff read (that isn't cached) + unsigned left = length; + uint64_t pos = offset; + auto lp = o->extent_map.seek_lextent(offset); + while (left > 0 && lp != o->extent_map.extent_map.end()) { + if (pos < lp->logical_offset) { + unsigned hole = lp->logical_offset - pos; + if (hole >= left) { + break; + } + dout(30) << __func__ << " hole 0x" << std::hex << pos << "~" << hole + << std::dec << dendl; + pos += hole; + left -= hole; + } + BlobRef& bptr = lp->blob; + unsigned l_off = pos - lp->logical_offset; + unsigned b_off = l_off + lp->blob_offset; + unsigned b_len = std::min(left, lp->length - l_off); + + ready_regions_t cache_res; + interval_set<uint32_t> cache_interval; + bptr->shared_blob->bc.read( + bptr->shared_blob->get_cache(), b_off, b_len, cache_res, cache_interval, + read_cache_policy); + dout(20) << __func__ << " blob " << *bptr << std::hex + << " need 0x" << b_off << "~" << b_len + << " cache has 0x" << cache_interval + << std::dec << dendl; + + auto pc = cache_res.begin(); + uint64_t chunk_size = bptr->get_blob().get_chunk_size(block_size); + while (b_len > 0) { + unsigned l; + if (pc != cache_res.end() && + pc->first == b_off) { + l = pc->second.length(); + ready_regions[pos] = std::move(pc->second); + dout(30) << __func__ << " use cache 0x" << std::hex << pos << ": 0x" + << b_off << "~" << l << std::dec << dendl; + ++pc; + } else { + l = b_len; + if (pc != cache_res.end()) { + ceph_assert(pc->first > b_off); + l = pc->first - b_off; + } + dout(30) << __func__ << " will read 0x" << std::hex << pos << ": 0x" + << b_off << "~" << l << std::dec << dendl; + // merge regions + { + uint64_t r_off = b_off; + uint64_t r_len = l; + uint64_t front = r_off % chunk_size; + if (front) { + r_off -= front; + r_len += front; + } + unsigned tail = r_len % chunk_size; + if (tail) { + r_len += chunk_size - tail; + } + bool merged = false; + regions2read_t& r2r = blobs2read[bptr]; + if (r2r.size()) { + read_req_t& pre = r2r.back(); + if (r_off <= (pre.r_off + pre.r_len)) { + front += (r_off - pre.r_off); + pre.r_len += (r_off + r_len - pre.r_off - pre.r_len); + pre.regs.emplace_back(region_t(pos, b_off, l, front)); + merged = true; + } + } + if (!merged) { + read_req_t req(r_off, r_len); + req.regs.emplace_back(region_t(pos, b_off, l, front)); + r2r.emplace_back(std::move(req)); + } + } + } + pos += l; + b_off += l; + left -= l; + b_len -= l; + } + ++lp; + } +} + +int BlueStore::_prepare_read_ioc( + blobs2read_t& blobs2read, + vector<bufferlist>* compressed_blob_bls, + IOContext* ioc) +{ + for (auto& p : blobs2read) { + const BlobRef& bptr = p.first; + regions2read_t& r2r = p.second; + dout(20) << __func__ << " blob " << *bptr << std::hex + << " need " << r2r << std::dec << dendl; + if (bptr->get_blob().is_compressed()) { + // read the whole thing + if (compressed_blob_bls->empty()) { + // ensure we avoid any reallocation on subsequent blobs + compressed_blob_bls->reserve(blobs2read.size()); + } + compressed_blob_bls->push_back(bufferlist()); + bufferlist& bl = compressed_blob_bls->back(); + auto r = bptr->get_blob().map( + 0, bptr->get_blob().get_ondisk_length(), + [&](uint64_t offset, uint64_t length) { + int r = bdev->aio_read(offset, length, &bl, ioc); + if (r < 0) + return r; + return 0; + }); + if (r < 0) { + derr << __func__ << " bdev-read failed: " << cpp_strerror(r) << dendl; + if (r == -EIO) { + // propagate EIO to caller + return r; + } + ceph_assert(r == 0); + } + } else { + // read the pieces + for (auto& req : r2r) { + dout(20) << __func__ << " region 0x" << std::hex + << req.regs.front().logical_offset + << ": 0x" << req.regs.front().blob_xoffset + << " reading 0x" << req.r_off + << "~" << req.r_len << std::dec + << dendl; + + // read it + auto r = bptr->get_blob().map( + req.r_off, req.r_len, + [&](uint64_t offset, uint64_t length) { + int r = bdev->aio_read(offset, length, &req.bl, ioc); + if (r < 0) + return r; + return 0; + }); + if (r < 0) { + derr << __func__ << " bdev-read failed: " << cpp_strerror(r) + << dendl; + if (r == -EIO) { + // propagate EIO to caller + return r; + } + ceph_assert(r == 0); + } + ceph_assert(req.bl.length() == req.r_len); + } + } + } + return 0; +} + +int BlueStore::_generate_read_result_bl( + OnodeRef o, + uint64_t offset, + size_t length, + ready_regions_t& ready_regions, + vector<bufferlist>& compressed_blob_bls, + blobs2read_t& blobs2read, + bool buffered, + bool* csum_error, + bufferlist& bl) +{ + // enumerate and decompress desired blobs + auto p = compressed_blob_bls.begin(); + blobs2read_t::iterator b2r_it = blobs2read.begin(); + while (b2r_it != blobs2read.end()) { + const BlobRef& bptr = b2r_it->first; + regions2read_t& r2r = b2r_it->second; + dout(20) << __func__ << " blob " << *bptr << std::hex + << " need 0x" << r2r << std::dec << dendl; + if (bptr->get_blob().is_compressed()) { + ceph_assert(p != compressed_blob_bls.end()); + bufferlist& compressed_bl = *p++; + if (_verify_csum(o, &bptr->get_blob(), 0, compressed_bl, + r2r.front().regs.front().logical_offset) < 0) { + *csum_error = true; + return -EIO; + } + bufferlist raw_bl; + auto r = _decompress(compressed_bl, &raw_bl); + if (r < 0) + return r; + if (buffered) { + bptr->shared_blob->bc.did_read(bptr->shared_blob->get_cache(), 0, + raw_bl); + } + for (auto& req : r2r) { + for (auto& r : req.regs) { + ready_regions[r.logical_offset].substr_of( + raw_bl, r.blob_xoffset, r.length); + } + } + } else { + for (auto& req : r2r) { + if (_verify_csum(o, &bptr->get_blob(), req.r_off, req.bl, + req.regs.front().logical_offset) < 0) { + *csum_error = true; + return -EIO; + } + if (buffered) { + bptr->shared_blob->bc.did_read(bptr->shared_blob->get_cache(), + req.r_off, req.bl); + } + + // prune and keep result + for (const auto& r : req.regs) { + ready_regions[r.logical_offset].substr_of(req.bl, r.front, r.length); + } + } + } + ++b2r_it; + } + + // generate a resulting buffer + auto pr = ready_regions.begin(); + auto pr_end = ready_regions.end(); + uint64_t pos = 0; + while (pos < length) { + if (pr != pr_end && pr->first == pos + offset) { + dout(30) << __func__ << " assemble 0x" << std::hex << pos + << ": data from 0x" << pr->first << "~" << pr->second.length() + << std::dec << dendl; + pos += pr->second.length(); + bl.claim_append(pr->second); + ++pr; + } else { + uint64_t l = length - pos; + if (pr != pr_end) { + ceph_assert(pr->first > pos + offset); + l = pr->first - (pos + offset); + } + dout(30) << __func__ << " assemble 0x" << std::hex << pos + << ": zeros for 0x" << (pos + offset) << "~" << l + << std::dec << dendl; + bl.append_zero(l); + pos += l; + } + } + ceph_assert(bl.length() == length); + ceph_assert(pos == length); + ceph_assert(pr == pr_end); + return 0; +} + +int BlueStore::_do_read( + Collection *c, + OnodeRef o, + uint64_t offset, + size_t length, + bufferlist& bl, + uint32_t op_flags, + uint64_t retry_count) +{ + FUNCTRACE(cct); + int r = 0; + int read_cache_policy = 0; // do not bypass clean or dirty cache + + dout(20) << __func__ << " 0x" << std::hex << offset << "~" << length + << " size 0x" << o->onode.size << " (" << std::dec + << o->onode.size << ")" << dendl; + bl.clear(); + + if (offset >= o->onode.size) { + return r; + } + + // generally, don't buffer anything, unless the client explicitly requests + // it. + bool buffered = false; + if (op_flags & CEPH_OSD_OP_FLAG_FADVISE_WILLNEED) { + dout(20) << __func__ << " will do buffered read" << dendl; + buffered = true; + } else if (cct->_conf->bluestore_default_buffered_read && + (op_flags & (CEPH_OSD_OP_FLAG_FADVISE_DONTNEED | + CEPH_OSD_OP_FLAG_FADVISE_NOCACHE)) == 0) { + dout(20) << __func__ << " defaulting to buffered read" << dendl; + buffered = true; + } + + if (offset + length > o->onode.size) { + length = o->onode.size - offset; + } + + auto start = mono_clock::now(); + o->extent_map.fault_range(db, offset, length); + log_latency(__func__, + l_bluestore_read_onode_meta_lat, + mono_clock::now() - start, + cct->_conf->bluestore_log_op_age); + _dump_onode<30>(cct, *o); + + // for deep-scrub, we only read dirty cache and bypass clean cache in + // order to read underlying block device in case there are silent disk errors. + if (op_flags & CEPH_OSD_OP_FLAG_BYPASS_CLEAN_CACHE) { + dout(20) << __func__ << " will bypass cache and do direct read" << dendl; + read_cache_policy = BufferSpace::BYPASS_CLEAN_CACHE; + } + + // build blob-wise list to of stuff read (that isn't cached) + ready_regions_t ready_regions; + blobs2read_t blobs2read; + _read_cache(o, offset, length, read_cache_policy, ready_regions, blobs2read); + + + // read raw blob data. + start = mono_clock::now(); // for the sake of simplicity + // measure the whole block below. + // The error isn't that much... + vector<bufferlist> compressed_blob_bls; + IOContext ioc(cct, NULL, true); // allow EIO + r = _prepare_read_ioc(blobs2read, &compressed_blob_bls, &ioc); + // we always issue aio for reading, so errors other than EIO are not allowed + if (r < 0) + return r; + + int64_t num_ios = blobs2read.size(); + if (ioc.has_pending_aios()) { + num_ios = ioc.get_num_ios(); + bdev->aio_submit(&ioc); + dout(20) << __func__ << " waiting for aio" << dendl; + ioc.aio_wait(); + r = ioc.get_return_value(); + if (r < 0) { + ceph_assert(r == -EIO); // no other errors allowed + return -EIO; + } + } + log_latency_fn(__func__, + l_bluestore_read_wait_aio_lat, + mono_clock::now() - start, + cct->_conf->bluestore_log_op_age, + [&](auto lat) { return ", num_ios = " + stringify(num_ios); } + ); + + bool csum_error = false; + r = _generate_read_result_bl(o, offset, length, ready_regions, + compressed_blob_bls, blobs2read, + buffered, &csum_error, bl); + if (csum_error) { + // Handles spurious read errors caused by a kernel bug. + // We sometimes get all-zero pages as a result of the read under + // high memory pressure. Retrying the failing read succeeds in most + // cases. + // See also: http://tracker.ceph.com/issues/22464 + if (retry_count >= cct->_conf->bluestore_retry_disk_reads) { + return -EIO; + } + return _do_read(c, o, offset, length, bl, op_flags, retry_count + 1); + } + r = bl.length(); + if (retry_count) { + logger->inc(l_bluestore_reads_with_retries); + dout(5) << __func__ << " read at 0x" << std::hex << offset << "~" << length + << " failed " << std::dec << retry_count << " times before succeeding" << dendl; + stringstream s; + s << " reads with retries: " << logger->get(l_bluestore_reads_with_retries); + _set_spurious_read_errors_alert(s.str()); + } + return r; +} + +int BlueStore::_verify_csum(OnodeRef& o, + const bluestore_blob_t* blob, uint64_t blob_xoffset, + const bufferlist& bl, + uint64_t logical_offset) const +{ + int bad; + uint64_t bad_csum; + auto start = mono_clock::now(); + int r = blob->verify_csum(blob_xoffset, bl, &bad, &bad_csum); + if (cct->_conf->bluestore_debug_inject_csum_err_probability > 0 && + (rand() % 10000) < cct->_conf->bluestore_debug_inject_csum_err_probability * 10000.0) { + derr << __func__ << " injecting bluestore checksum verifcation error" << dendl; + bad = blob_xoffset; + r = -1; + bad_csum = 0xDEADBEEF; + } + if (r < 0) { + if (r == -1) { + PExtentVector pex; + blob->map( + bad, + blob->get_csum_chunk_size(), + [&](uint64_t offset, uint64_t length) { + pex.emplace_back(bluestore_pextent_t(offset, length)); + return 0; + }); + derr << __func__ << " bad " + << Checksummer::get_csum_type_string(blob->csum_type) + << "/0x" << std::hex << blob->get_csum_chunk_size() + << " checksum at blob offset 0x" << bad + << ", got 0x" << bad_csum << ", expected 0x" + << blob->get_csum_item(bad / blob->get_csum_chunk_size()) << std::dec + << ", device location " << pex + << ", logical extent 0x" << std::hex + << (logical_offset + bad - blob_xoffset) << "~" + << blob->get_csum_chunk_size() << std::dec + << ", object " << o->oid + << dendl; + } else { + derr << __func__ << " failed with exit code: " << cpp_strerror(r) << dendl; + } + } + log_latency(__func__, + l_bluestore_csum_lat, + mono_clock::now() - start, + cct->_conf->bluestore_log_op_age); + if (cct->_conf->bluestore_ignore_data_csum) { + return 0; + } + return r; +} + +int BlueStore::_decompress(bufferlist& source, bufferlist* result) +{ + int r = 0; + auto start = mono_clock::now(); + auto i = source.cbegin(); + bluestore_compression_header_t chdr; + decode(chdr, i); + int alg = int(chdr.type); + CompressorRef cp = compressor; + if (!cp || (int)cp->get_type() != alg) { + cp = Compressor::create(cct, alg); + } + + if (!cp.get()) { + // if compressor isn't available - error, because cannot return + // decompressed data? + + const char* alg_name = Compressor::get_comp_alg_name(alg); + derr << __func__ << " can't load decompressor " << alg_name << dendl; + _set_compression_alert(false, alg_name); + r = -EIO; + } else { + r = cp->decompress(i, chdr.length, *result, chdr.compressor_message); + if (r < 0) { + derr << __func__ << " decompression failed with exit code " << r << dendl; + r = -EIO; + } + } + log_latency(__func__, + l_bluestore_decompress_lat, + mono_clock::now() - start, + cct->_conf->bluestore_log_op_age); + return r; +} + +// this stores fiemap into interval_set, other variations +// use it internally +int BlueStore::_fiemap( + CollectionHandle &c_, + const ghobject_t& oid, + uint64_t offset, + size_t length, + interval_set<uint64_t>& destset) +{ + Collection *c = static_cast<Collection *>(c_.get()); + if (!c->exists) + return -ENOENT; + { + std::shared_lock l(c->lock); + + OnodeRef o = c->get_onode(oid, false); + if (!o || !o->exists) { + return -ENOENT; + } + _dump_onode<30>(cct, *o); + + dout(20) << __func__ << " 0x" << std::hex << offset << "~" << length + << " size 0x" << o->onode.size << std::dec << dendl; + + boost::intrusive::set<Extent>::iterator ep, eend; + if (offset >= o->onode.size) + goto out; + + if (offset + length > o->onode.size) { + length = o->onode.size - offset; + } + + o->extent_map.fault_range(db, offset, length); + eend = o->extent_map.extent_map.end(); + ep = o->extent_map.seek_lextent(offset); + while (length > 0) { + dout(20) << __func__ << " offset " << offset << dendl; + if (ep != eend && ep->logical_offset + ep->length <= offset) { + ++ep; + continue; + } + + uint64_t x_len = length; + if (ep != eend && ep->logical_offset <= offset) { + uint64_t x_off = offset - ep->logical_offset; + x_len = std::min(x_len, ep->length - x_off); + dout(30) << __func__ << " lextent 0x" << std::hex << offset << "~" + << x_len << std::dec << " blob " << ep->blob << dendl; + destset.insert(offset, x_len); + length -= x_len; + offset += x_len; + if (x_off + x_len == ep->length) + ++ep; + continue; + } + if (ep != eend && + ep->logical_offset > offset && + ep->logical_offset - offset < x_len) { + x_len = ep->logical_offset - offset; + } + offset += x_len; + length -= x_len; + } + } + + out: + dout(20) << __func__ << " 0x" << std::hex << offset << "~" << length + << " size = 0x(" << destset << ")" << std::dec << dendl; + return 0; +} + +int BlueStore::fiemap( + CollectionHandle &c_, + const ghobject_t& oid, + uint64_t offset, + size_t length, + bufferlist& bl) +{ + interval_set<uint64_t> m; + int r = _fiemap(c_, oid, offset, length, m); + if (r >= 0) { + encode(m, bl); + } + return r; +} + +int BlueStore::fiemap( + CollectionHandle &c_, + const ghobject_t& oid, + uint64_t offset, + size_t length, + map<uint64_t, uint64_t>& destmap) +{ + interval_set<uint64_t> m; + int r = _fiemap(c_, oid, offset, length, m); + if (r >= 0) { + destmap = std::move(m).detach(); + } + return r; +} + +int BlueStore::readv( + CollectionHandle &c_, + const ghobject_t& oid, + interval_set<uint64_t>& m, + bufferlist& bl, + uint32_t op_flags) +{ + auto start = mono_clock::now(); + Collection *c = static_cast<Collection *>(c_.get()); + const coll_t &cid = c->get_cid(); + dout(15) << __func__ << " " << cid << " " << oid + << " fiemap " << m + << dendl; + if (!c->exists) + return -ENOENT; + + bl.clear(); + int r; + { + std::shared_lock l(c->lock); + auto start1 = mono_clock::now(); + OnodeRef o = c->get_onode(oid, false); + log_latency("get_onode@read", + l_bluestore_read_onode_meta_lat, + mono_clock::now() - start1, + cct->_conf->bluestore_log_op_age); + if (!o || !o->exists) { + r = -ENOENT; + goto out; + } + + if (m.empty()) { + r = 0; + goto out; + } + + r = _do_readv(c, o, m, bl, op_flags); + if (r == -EIO) { + logger->inc(l_bluestore_read_eio); + } + } + + out: + if (r >= 0 && _debug_data_eio(oid)) { + r = -EIO; + derr << __func__ << " " << c->cid << " " << oid << " INJECT EIO" << dendl; + } else if (oid.hobj.pool > 0 && /* FIXME, see #23029 */ + cct->_conf->bluestore_debug_random_read_err && + (rand() % (int)(cct->_conf->bluestore_debug_random_read_err * + 100.0)) == 0) { + dout(0) << __func__ << ": inject random EIO" << dendl; + r = -EIO; + } + dout(10) << __func__ << " " << cid << " " << oid + << " fiemap " << m << std::dec + << " = " << r << dendl; + log_latency(__func__, + l_bluestore_read_lat, + mono_clock::now() - start, + cct->_conf->bluestore_log_op_age); + return r; +} + +int BlueStore::_do_readv( + Collection *c, + OnodeRef o, + const interval_set<uint64_t>& m, + bufferlist& bl, + uint32_t op_flags, + uint64_t retry_count) +{ + FUNCTRACE(cct); + int r = 0; + int read_cache_policy = 0; // do not bypass clean or dirty cache + + dout(20) << __func__ << " fiemap " << m << std::hex + << " size 0x" << o->onode.size << " (" << std::dec + << o->onode.size << ")" << dendl; + + // generally, don't buffer anything, unless the client explicitly requests + // it. + bool buffered = false; + if (op_flags & CEPH_OSD_OP_FLAG_FADVISE_WILLNEED) { + dout(20) << __func__ << " will do buffered read" << dendl; + buffered = true; + } else if (cct->_conf->bluestore_default_buffered_read && + (op_flags & (CEPH_OSD_OP_FLAG_FADVISE_DONTNEED | + CEPH_OSD_OP_FLAG_FADVISE_NOCACHE)) == 0) { + dout(20) << __func__ << " defaulting to buffered read" << dendl; + buffered = true; + } + // this method must be idempotent since we may call it several times + // before we finally read the expected result. + bl.clear(); + + // call fiemap first! + ceph_assert(m.range_start() <= o->onode.size); + ceph_assert(m.range_end() <= o->onode.size); + auto start = mono_clock::now(); + o->extent_map.fault_range(db, m.range_start(), m.range_end() - m.range_start()); + log_latency(__func__, + l_bluestore_read_onode_meta_lat, + mono_clock::now() - start, + cct->_conf->bluestore_log_op_age); + _dump_onode<30>(cct, *o); + + IOContext ioc(cct, NULL, true); // allow EIO + vector<std::tuple<ready_regions_t, vector<bufferlist>, blobs2read_t>> raw_results; + raw_results.reserve(m.num_intervals()); + int i = 0; + for (auto p = m.begin(); p != m.end(); p++, i++) { + raw_results.push_back({}); + _read_cache(o, p.get_start(), p.get_len(), read_cache_policy, + std::get<0>(raw_results[i]), std::get<2>(raw_results[i])); + r = _prepare_read_ioc(std::get<2>(raw_results[i]), &std::get<1>(raw_results[i]), &ioc); + // we always issue aio for reading, so errors other than EIO are not allowed + if (r < 0) + return r; + } + + auto num_ios = m.size(); + if (ioc.has_pending_aios()) { + num_ios = ioc.get_num_ios(); + bdev->aio_submit(&ioc); + dout(20) << __func__ << " waiting for aio" << dendl; + ioc.aio_wait(); + r = ioc.get_return_value(); + if (r < 0) { + ceph_assert(r == -EIO); // no other errors allowed + return -EIO; + } + } + log_latency_fn(__func__, + l_bluestore_read_wait_aio_lat, + mono_clock::now() - start, + cct->_conf->bluestore_log_op_age, + [&](auto lat) { return ", num_ios = " + stringify(num_ios); } + ); + + ceph_assert(raw_results.size() == (size_t)m.num_intervals()); + i = 0; + for (auto p = m.begin(); p != m.end(); p++, i++) { + bool csum_error = false; + bufferlist t; + r = _generate_read_result_bl(o, p.get_start(), p.get_len(), + std::get<0>(raw_results[i]), + std::get<1>(raw_results[i]), + std::get<2>(raw_results[i]), + buffered, &csum_error, t); + if (csum_error) { + // Handles spurious read errors caused by a kernel bug. + // We sometimes get all-zero pages as a result of the read under + // high memory pressure. Retrying the failing read succeeds in most + // cases. + // See also: http://tracker.ceph.com/issues/22464 + if (retry_count >= cct->_conf->bluestore_retry_disk_reads) { + return -EIO; + } + return _do_readv(c, o, m, bl, op_flags, retry_count + 1); + } + bl.claim_append(t); + } + if (retry_count) { + logger->inc(l_bluestore_reads_with_retries); + dout(5) << __func__ << " read fiemap " << m + << " failed " << retry_count << " times before succeeding" + << dendl; + } + return bl.length(); +} + +int BlueStore::dump_onode(CollectionHandle &c_, + const ghobject_t& oid, + const string& section_name, + Formatter *f) +{ + Collection *c = static_cast<Collection *>(c_.get()); + dout(15) << __func__ << " " << c->cid << " " << oid << dendl; + if (!c->exists) + return -ENOENT; + + int r; + { + std::shared_lock l(c->lock); + + OnodeRef o = c->get_onode(oid, false); + if (!o || !o->exists) { + r = -ENOENT; + goto out; + } + // FIXME minor: actually the next line isn't enough to + // load shared blobs. Leaving as is for now.. + // + o->extent_map.fault_range(db, 0, OBJECT_MAX_SIZE); + + _dump_onode<0>(cct, *o); + f->open_object_section(section_name.c_str()); + o->dump(f); + f->close_section(); + r = 0; + } + out: + dout(10) << __func__ << " " << c->cid << " " << oid + << " = " << r << dendl; + return r; +} + +int BlueStore::getattr( + CollectionHandle &c_, + const ghobject_t& oid, + const char *name, + bufferptr& value) +{ + Collection *c = static_cast<Collection *>(c_.get()); + dout(15) << __func__ << " " << c->cid << " " << oid << " " << name << dendl; + if (!c->exists) + return -ENOENT; + + int r; + { + std::shared_lock l(c->lock); + mempool::bluestore_cache_meta::string k(name); + + OnodeRef o = c->get_onode(oid, false); + if (!o || !o->exists) { + r = -ENOENT; + goto out; + } + + if (!o->onode.attrs.count(k)) { + r = -ENODATA; + goto out; + } + value = o->onode.attrs[k]; + r = 0; + } + out: + if (r == 0 && _debug_mdata_eio(oid)) { + r = -EIO; + derr << __func__ << " " << c->cid << " " << oid << " INJECT EIO" << dendl; + } + dout(10) << __func__ << " " << c->cid << " " << oid << " " << name + << " = " << r << dendl; + return r; +} + +int BlueStore::getattrs( + CollectionHandle &c_, + const ghobject_t& oid, + map<string,bufferptr>& aset) +{ + Collection *c = static_cast<Collection *>(c_.get()); + dout(15) << __func__ << " " << c->cid << " " << oid << dendl; + if (!c->exists) + return -ENOENT; + + int r; + { + std::shared_lock l(c->lock); + + OnodeRef o = c->get_onode(oid, false); + if (!o || !o->exists) { + r = -ENOENT; + goto out; + } + for (auto& i : o->onode.attrs) { + aset.emplace(i.first.c_str(), i.second); + } + r = 0; + } + + out: + if (r == 0 && _debug_mdata_eio(oid)) { + r = -EIO; + derr << __func__ << " " << c->cid << " " << oid << " INJECT EIO" << dendl; + } + dout(10) << __func__ << " " << c->cid << " " << oid + << " = " << r << dendl; + return r; +} + +int BlueStore::list_collections(vector<coll_t>& ls) +{ + std::shared_lock l(coll_lock); + ls.reserve(coll_map.size()); + for (ceph::unordered_map<coll_t, CollectionRef>::iterator p = coll_map.begin(); + p != coll_map.end(); + ++p) + ls.push_back(p->first); + return 0; +} + +bool BlueStore::collection_exists(const coll_t& c) +{ + std::shared_lock l(coll_lock); + return coll_map.count(c); +} + +int BlueStore::collection_empty(CollectionHandle& ch, bool *empty) +{ + dout(15) << __func__ << " " << ch->cid << dendl; + vector<ghobject_t> ls; + ghobject_t next; + int r = collection_list(ch, ghobject_t(), ghobject_t::get_max(), 1, + &ls, &next); + if (r < 0) { + derr << __func__ << " collection_list returned: " << cpp_strerror(r) + << dendl; + return r; + } + *empty = ls.empty(); + dout(10) << __func__ << " " << ch->cid << " = " << (int)(*empty) << dendl; + return 0; +} + +int BlueStore::collection_bits(CollectionHandle& ch) +{ + dout(15) << __func__ << " " << ch->cid << dendl; + Collection *c = static_cast<Collection*>(ch.get()); + std::shared_lock l(c->lock); + dout(10) << __func__ << " " << ch->cid << " = " << c->cnode.bits << dendl; + return c->cnode.bits; +} + +int BlueStore::collection_list( + CollectionHandle &c_, const ghobject_t& start, const ghobject_t& end, int max, + vector<ghobject_t> *ls, ghobject_t *pnext) +{ + Collection *c = static_cast<Collection *>(c_.get()); + c->flush(); + dout(15) << __func__ << " " << c->cid + << " start " << start << " end " << end << " max " << max << dendl; + int r; + { + std::shared_lock l(c->lock); + r = _collection_list(c, start, end, max, false, ls, pnext); + } + + dout(10) << __func__ << " " << c->cid + << " start " << start << " end " << end << " max " << max + << " = " << r << ", ls.size() = " << ls->size() + << ", next = " << (pnext ? *pnext : ghobject_t()) << dendl; + return r; +} + +int BlueStore::collection_list_legacy( + CollectionHandle &c_, const ghobject_t& start, const ghobject_t& end, int max, + vector<ghobject_t> *ls, ghobject_t *pnext) +{ + Collection *c = static_cast<Collection *>(c_.get()); + c->flush(); + dout(15) << __func__ << " " << c->cid + << " start " << start << " end " << end << " max " << max << dendl; + int r; + { + std::shared_lock l(c->lock); + r = _collection_list(c, start, end, max, true, ls, pnext); + } + + dout(10) << __func__ << " " << c->cid + << " start " << start << " end " << end << " max " << max + << " = " << r << ", ls.size() = " << ls->size() + << ", next = " << (pnext ? *pnext : ghobject_t()) << dendl; + return r; +} + +int BlueStore::_collection_list( + Collection *c, const ghobject_t& start, const ghobject_t& end, int max, + bool legacy, vector<ghobject_t> *ls, ghobject_t *pnext) +{ + + if (!c->exists) + return -ENOENT; + + ghobject_t static_next; + std::unique_ptr<CollectionListIterator> it; + ghobject_t coll_range_temp_start, coll_range_temp_end; + ghobject_t coll_range_start, coll_range_end; + ghobject_t pend; + bool temp; + + if (!pnext) + pnext = &static_next; + + auto log_latency = make_scope_guard( + [&, start_time = mono_clock::now(), func_name = __func__] { + log_latency_fn( + func_name, + l_bluestore_remove_lat, + mono_clock::now() - start_time, + cct->_conf->bluestore_log_collection_list_age, + [&](const ceph::timespan& lat) { + ostringstream ostr; + ostr << ", lat = " << timespan_str(lat) + << " cid =" << c->cid + << " start " << start << " end " << end + << " max " << max; + return ostr.str(); + }); + }); + + if (start.is_max() || start.hobj.is_max()) { + *pnext = ghobject_t::get_max(); + return 0; + } + get_coll_range(c->cid, c->cnode.bits, &coll_range_temp_start, + &coll_range_temp_end, &coll_range_start, &coll_range_end, legacy); + dout(20) << __func__ + << " range " << coll_range_temp_start + << " to " << coll_range_temp_end + << " and " << coll_range_start + << " to " << coll_range_end + << " start " << start << dendl; + if (legacy) { + it = std::make_unique<SimpleCollectionListIterator>( + cct, db->get_iterator(PREFIX_OBJ)); + } else { + it = std::make_unique<SortedCollectionListIterator>( + db->get_iterator(PREFIX_OBJ)); + } + if (start == ghobject_t() || + start.hobj == hobject_t() || + start == c->cid.get_min_hobj()) { + it->upper_bound(coll_range_temp_start); + temp = true; + } else { + if (start.hobj.is_temp()) { + temp = true; + ceph_assert(start >= coll_range_temp_start && start < coll_range_temp_end); + } else { + temp = false; + ceph_assert(start >= coll_range_start && start < coll_range_end); + } + dout(20) << __func__ << " temp=" << (int)temp << dendl; + it->lower_bound(start); + } + if (end.hobj.is_max()) { + pend = temp ? coll_range_temp_end : coll_range_end; + } else { + if (end.hobj.is_temp()) { + if (temp) { + pend = end; + } else { + *pnext = ghobject_t::get_max(); + return 0; + } + } else { + pend = temp ? coll_range_temp_end : end; + } + } + dout(20) << __func__ << " pend " << pend << dendl; + while (true) { + if (!it->valid() || it->is_ge(pend)) { + if (!it->valid()) + dout(20) << __func__ << " iterator not valid (end of db?)" << dendl; + else + dout(20) << __func__ << " oid " << it->oid() << " >= " << pend << dendl; + if (temp) { + if (end.hobj.is_temp()) { + if (it->valid() && it->is_lt(coll_range_temp_end)) { + *pnext = it->oid(); + return 0; + } + break; + } + dout(30) << __func__ << " switch to non-temp namespace" << dendl; + temp = false; + it->upper_bound(coll_range_start); + if (end.hobj.is_max()) + pend = coll_range_end; + else + pend = end; + dout(30) << __func__ << " pend " << pend << dendl; + continue; + } + if (it->valid() && it->is_lt(coll_range_end)) { + *pnext = it->oid(); + return 0; + } + break; + } + dout(20) << __func__ << " oid " << it->oid() << " end " << end << dendl; + if (ls->size() >= (unsigned)max) { + dout(20) << __func__ << " reached max " << max << dendl; + *pnext = it->oid(); + return 0; + } + ls->push_back(it->oid()); + it->next(); + } + *pnext = ghobject_t::get_max(); + return 0; +} + +int BlueStore::omap_get( + CollectionHandle &c_, ///< [in] Collection containing oid + const ghobject_t &oid, ///< [in] Object containing omap + bufferlist *header, ///< [out] omap header + map<string, bufferlist> *out /// < [out] Key to value map + ) +{ + Collection *c = static_cast<Collection *>(c_.get()); + return _omap_get(c, oid, header, out); +} + +int BlueStore::_omap_get( + Collection *c, ///< [in] Collection containing oid + const ghobject_t &oid, ///< [in] Object containing omap + bufferlist *header, ///< [out] omap header + map<string, bufferlist> *out /// < [out] Key to value map + ) +{ + dout(15) << __func__ << " " << c->get_cid() << " oid " << oid << dendl; + if (!c->exists) + return -ENOENT; + std::shared_lock l(c->lock); + int r = 0; + OnodeRef o = c->get_onode(oid, false); + if (!o || !o->exists) { + r = -ENOENT; + goto out; + } + r = _onode_omap_get(o, header, out); + out: + dout(10) << __func__ << " " << c->get_cid() << " oid " << oid << " = " << r + << dendl; + return r; +} + +int BlueStore::_onode_omap_get( + const OnodeRef &o, ///< [in] Object containing omap + bufferlist *header, ///< [out] omap header + map<string, bufferlist> *out /// < [out] Key to value map +) +{ + int r = 0; + if (!o || !o->exists) { + r = -ENOENT; + goto out; + } + if (!o->onode.has_omap()) + goto out; + o->flush(); + { + const string& prefix = o->get_omap_prefix(); + string head, tail; + o->get_omap_header(&head); + o->get_omap_tail(&tail); + KeyValueDB::Iterator it = db->get_iterator(prefix, 0, KeyValueDB::IteratorBounds{head, tail}); + it->lower_bound(head); + while (it->valid()) { + if (it->key() == head) { + dout(30) << __func__ << " got header" << dendl; + *header = it->value(); + } else if (it->key() >= tail) { + dout(30) << __func__ << " reached tail" << dendl; + break; + } else { + string user_key; + o->decode_omap_key(it->key(), &user_key); + dout(20) << __func__ << " got " << pretty_binary_string(it->key()) + << " -> " << user_key << dendl; + (*out)[user_key] = it->value(); + } + it->next(); + } + } +out: + return r; +} + +int BlueStore::omap_get_header( + CollectionHandle &c_, ///< [in] Collection containing oid + const ghobject_t &oid, ///< [in] Object containing omap + bufferlist *header, ///< [out] omap header + bool allow_eio ///< [in] don't assert on eio + ) +{ + Collection *c = static_cast<Collection *>(c_.get()); + dout(15) << __func__ << " " << c->get_cid() << " oid " << oid << dendl; + if (!c->exists) + return -ENOENT; + std::shared_lock l(c->lock); + int r = 0; + OnodeRef o = c->get_onode(oid, false); + if (!o || !o->exists) { + r = -ENOENT; + goto out; + } + if (!o->onode.has_omap()) + goto out; + o->flush(); + { + string head; + o->get_omap_header(&head); + if (db->get(o->get_omap_prefix(), head, header) >= 0) { + dout(30) << __func__ << " got header" << dendl; + } else { + dout(30) << __func__ << " no header" << dendl; + } + } + out: + dout(10) << __func__ << " " << c->get_cid() << " oid " << oid << " = " << r + << dendl; + return r; +} + +int BlueStore::omap_get_keys( + CollectionHandle &c_, ///< [in] Collection containing oid + const ghobject_t &oid, ///< [in] Object containing omap + set<string> *keys ///< [out] Keys defined on oid + ) +{ + Collection *c = static_cast<Collection *>(c_.get()); + dout(15) << __func__ << " " << c->get_cid() << " oid " << oid << dendl; + if (!c->exists) + return -ENOENT; + auto start1 = mono_clock::now(); + std::shared_lock l(c->lock); + int r = 0; + OnodeRef o = c->get_onode(oid, false); + if (!o || !o->exists) { + r = -ENOENT; + goto out; + } + if (!o->onode.has_omap()) + goto out; + o->flush(); + { + const string& prefix = o->get_omap_prefix(); + string head, tail; + o->get_omap_key(string(), &head); + o->get_omap_tail(&tail); + KeyValueDB::Iterator it = db->get_iterator(prefix, 0, KeyValueDB::IteratorBounds{head, tail}); + it->lower_bound(head); + while (it->valid()) { + if (it->key() >= tail) { + dout(30) << __func__ << " reached tail" << dendl; + break; + } + string user_key; + o->decode_omap_key(it->key(), &user_key); + dout(20) << __func__ << " got " << pretty_binary_string(it->key()) + << " -> " << user_key << dendl; + keys->insert(user_key); + it->next(); + } + } + out: + c->store->log_latency( + __func__, + l_bluestore_omap_get_keys_lat, + mono_clock::now() - start1, + c->store->cct->_conf->bluestore_log_omap_iterator_age); + + dout(10) << __func__ << " " << c->get_cid() << " oid " << oid << " = " << r + << dendl; + return r; +} + +int BlueStore::omap_get_values( + CollectionHandle &c_, ///< [in] Collection containing oid + const ghobject_t &oid, ///< [in] Object containing omap + const set<string> &keys, ///< [in] Keys to get + map<string, bufferlist> *out ///< [out] Returned keys and values + ) +{ + Collection *c = static_cast<Collection *>(c_.get()); + dout(15) << __func__ << " " << c->get_cid() << " oid " << oid << dendl; + if (!c->exists) + return -ENOENT; + std::shared_lock l(c->lock); + auto start1 = mono_clock::now(); + int r = 0; + string final_key; + OnodeRef o = c->get_onode(oid, false); + if (!o || !o->exists) { + r = -ENOENT; + goto out; + } + if (!o->onode.has_omap()) { + goto out; + } + o->flush(); + { + const string& prefix = o->get_omap_prefix(); + o->get_omap_key(string(), &final_key); + size_t base_key_len = final_key.size(); + for (set<string>::const_iterator p = keys.begin(); p != keys.end(); ++p) { + final_key.resize(base_key_len); // keep prefix + final_key += *p; + bufferlist val; + if (db->get(prefix, final_key, &val) >= 0) { + dout(30) << __func__ << " got " << pretty_binary_string(final_key) + << " -> " << *p << dendl; + out->insert(make_pair(*p, val)); + } + } + } + out: + c->store->log_latency( + __func__, + l_bluestore_omap_get_values_lat, + mono_clock::now() - start1, + c->store->cct->_conf->bluestore_log_omap_iterator_age); + + dout(10) << __func__ << " " << c->get_cid() << " oid " << oid << " = " << r + << dendl; + return r; +} + +#ifdef WITH_SEASTAR +int BlueStore::omap_get_values( + CollectionHandle &c_, ///< [in] Collection containing oid + const ghobject_t &oid, ///< [in] Object containing omap + const std::optional<string> &start_after, ///< [in] Keys to get + map<string, bufferlist> *output ///< [out] Returned keys and values + ) +{ + Collection *c = static_cast<Collection *>(c_.get()); + dout(15) << __func__ << " " << c->get_cid() << " oid " << oid << dendl; + if (!c->exists) + return -ENOENT; + std::shared_lock l(c->lock); + int r = 0; + OnodeRef o = c->get_onode(oid, false); + if (!o || !o->exists) { + r = -ENOENT; + goto out; + } + if (!o->onode.has_omap()) { + goto out; + } + o->flush(); + { + ObjectMap::ObjectMapIterator iter = get_omap_iterator(c_, oid); + if (!iter) { + r = -ENOENT; + goto out; + } + iter->upper_bound(*start_after); + for (; iter->valid(); iter->next()) { + output->insert(make_pair(iter->key(), iter->value())); + } + } + +out: + dout(10) << __func__ << " " << c->get_cid() << " oid " << oid << " = " << r + << dendl; + return r; +} +#endif + +int BlueStore::omap_check_keys( + CollectionHandle &c_, ///< [in] Collection containing oid + const ghobject_t &oid, ///< [in] Object containing omap + const set<string> &keys, ///< [in] Keys to check + set<string> *out ///< [out] Subset of keys defined on oid + ) +{ + Collection *c = static_cast<Collection *>(c_.get()); + dout(15) << __func__ << " " << c->get_cid() << " oid " << oid << dendl; + if (!c->exists) + return -ENOENT; + std::shared_lock l(c->lock); + int r = 0; + string final_key; + OnodeRef o = c->get_onode(oid, false); + if (!o || !o->exists) { + r = -ENOENT; + goto out; + } + if (!o->onode.has_omap()) { + goto out; + } + o->flush(); + { + const string& prefix = o->get_omap_prefix(); + o->get_omap_key(string(), &final_key); + size_t base_key_len = final_key.size(); + for (set<string>::const_iterator p = keys.begin(); p != keys.end(); ++p) { + final_key.resize(base_key_len); // keep prefix + final_key += *p; + bufferlist val; + if (db->get(prefix, final_key, &val) >= 0) { + dout(30) << __func__ << " have " << pretty_binary_string(final_key) + << " -> " << *p << dendl; + out->insert(*p); + } else { + dout(30) << __func__ << " miss " << pretty_binary_string(final_key) + << " -> " << *p << dendl; + } + } + } + out: + dout(10) << __func__ << " " << c->get_cid() << " oid " << oid << " = " << r + << dendl; + return r; +} + +ObjectMap::ObjectMapIterator BlueStore::get_omap_iterator( + CollectionHandle &c_, ///< [in] collection + const ghobject_t &oid ///< [in] object + ) +{ + Collection *c = static_cast<Collection *>(c_.get()); + dout(10) << __func__ << " " << c->get_cid() << " " << oid << dendl; + if (!c->exists) { + return ObjectMap::ObjectMapIterator(); + } + std::shared_lock l(c->lock); + OnodeRef o = c->get_onode(oid, false); + if (!o || !o->exists) { + dout(10) << __func__ << " " << oid << "doesn't exist" <<dendl; + return ObjectMap::ObjectMapIterator(); + } + o->flush(); + dout(10) << __func__ << " has_omap = " << (int)o->onode.has_omap() <<dendl; + auto bounds = KeyValueDB::IteratorBounds(); + if (o->onode.has_omap()) { + std::string lower_bound, upper_bound; + o->get_omap_key(string(), &lower_bound); + o->get_omap_tail(&upper_bound); + bounds.lower_bound = std::move(lower_bound); + bounds.upper_bound = std::move(upper_bound); + } + KeyValueDB::Iterator it = db->get_iterator(o->get_omap_prefix(), 0, std::move(bounds)); + return ObjectMap::ObjectMapIterator(new OmapIteratorImpl(c, o, it)); +} + +// ----------------- +// write helpers + +uint64_t BlueStore::_get_ondisk_reserved() const { + ceph_assert(min_alloc_size); + return round_up_to( + std::max<uint64_t>(SUPER_RESERVED, min_alloc_size), min_alloc_size); +} + +void BlueStore::_prepare_ondisk_format_super(KeyValueDB::Transaction& t) +{ + dout(10) << __func__ << " ondisk_format " << ondisk_format + << " min_compat_ondisk_format " << min_compat_ondisk_format + << dendl; + ceph_assert(ondisk_format == latest_ondisk_format); + { + bufferlist bl; + encode(ondisk_format, bl); + t->set(PREFIX_SUPER, "ondisk_format", bl); + } + { + bufferlist bl; + encode(min_compat_ondisk_format, bl); + t->set(PREFIX_SUPER, "min_compat_ondisk_format", bl); + } +} + +int BlueStore::_open_super_meta() +{ + // nid + { + nid_max = 0; + bufferlist bl; + db->get(PREFIX_SUPER, "nid_max", &bl); + auto p = bl.cbegin(); + try { + uint64_t v; + decode(v, p); + nid_max = v; + } catch (ceph::buffer::error& e) { + derr << __func__ << " unable to read nid_max" << dendl; + return -EIO; + } + dout(1) << __func__ << " old nid_max " << nid_max << dendl; + nid_last = nid_max.load(); + } + + // blobid + { + blobid_max = 0; + bufferlist bl; + db->get(PREFIX_SUPER, "blobid_max", &bl); + auto p = bl.cbegin(); + try { + uint64_t v; + decode(v, p); + blobid_max = v; + } catch (ceph::buffer::error& e) { + derr << __func__ << " unable to read blobid_max" << dendl; + return -EIO; + } + dout(1) << __func__ << " old blobid_max " << blobid_max << dendl; + blobid_last = blobid_max.load(); + } + + // freelist + { + bufferlist bl; + db->get(PREFIX_SUPER, "freelist_type", &bl); + if (bl.length()) { + freelist_type = std::string(bl.c_str(), bl.length()); + dout(1) << __func__ << " freelist_type " << freelist_type << dendl; + } else { + ceph_abort_msg("Not Support extent freelist manager"); + } + } + + // ondisk format + int32_t compat_ondisk_format = 0; + { + bufferlist bl; + int r = db->get(PREFIX_SUPER, "ondisk_format", &bl); + if (r < 0) { + // base case: kraken bluestore is v1 and readable by v1 + dout(20) << __func__ << " missing ondisk_format; assuming kraken" + << dendl; + ondisk_format = 1; + compat_ondisk_format = 1; + } else { + auto p = bl.cbegin(); + try { + decode(ondisk_format, p); + } catch (ceph::buffer::error& e) { + derr << __func__ << " unable to read ondisk_format" << dendl; + return -EIO; + } + bl.clear(); + { + r = db->get(PREFIX_SUPER, "min_compat_ondisk_format", &bl); + ceph_assert(!r); + auto p = bl.cbegin(); + try { + decode(compat_ondisk_format, p); + } catch (ceph::buffer::error& e) { + derr << __func__ << " unable to read compat_ondisk_format" << dendl; + return -EIO; + } + } + } + dout(1) << __func__ << " ondisk_format " << ondisk_format + << " compat_ondisk_format " << compat_ondisk_format + << dendl; + } + + if (latest_ondisk_format < compat_ondisk_format) { + derr << __func__ << " compat_ondisk_format is " + << compat_ondisk_format << " but we only understand version " + << latest_ondisk_format << dendl; + return -EPERM; + } + + { + bufferlist bl; + db->get(PREFIX_SUPER, "min_alloc_size", &bl); + auto p = bl.cbegin(); + try { + uint64_t val; + decode(val, p); + min_alloc_size = val; + min_alloc_size_order = ctz(val); + ceph_assert(min_alloc_size == 1u << min_alloc_size_order); + } catch (ceph::buffer::error& e) { + derr << __func__ << " unable to read min_alloc_size" << dendl; + return -EIO; + } + dout(1) << __func__ << " min_alloc_size 0x" << std::hex << min_alloc_size + << std::dec << dendl; + } + + _set_per_pool_omap(); + + _open_statfs(); + _set_alloc_sizes(); + _set_throttle_params(); + + _set_csum(); + _set_compression(); + _set_blob_size(); + + _validate_bdev(); + return 0; +} + +int BlueStore::_upgrade_super() +{ + dout(1) << __func__ << " from " << ondisk_format << ", latest " + << latest_ondisk_format << dendl; + if (ondisk_format < latest_ondisk_format) { + ceph_assert(ondisk_format > 0); + ceph_assert(ondisk_format < latest_ondisk_format); + + KeyValueDB::Transaction t = db->get_transaction(); + if (ondisk_format == 1) { + // changes: + // - super: added ondisk_format + // - super: added min_readable_ondisk_format + // - super: added min_compat_ondisk_format + // - super: added min_alloc_size + // - super: removed min_min_alloc_size + { + bufferlist bl; + db->get(PREFIX_SUPER, "min_min_alloc_size", &bl); + auto p = bl.cbegin(); + try { + uint64_t val; + decode(val, p); + min_alloc_size = val; + } catch (ceph::buffer::error& e) { + derr << __func__ << " failed to read min_min_alloc_size" << dendl; + return -EIO; + } + t->set(PREFIX_SUPER, "min_alloc_size", bl); + t->rmkey(PREFIX_SUPER, "min_min_alloc_size"); + } + ondisk_format = 2; + } + if (ondisk_format == 2) { + // changes: + // - onode has FLAG_PERPOOL_OMAP. Note that we do not know that *all* + // oondes are using the per-pool prefix until a repair is run; at that + // point the per_pool_omap=1 key will be set. + // - super: added per_pool_omap key, which indicates that *all* objects + // are using the new prefix and key format + ondisk_format = 3; + } + if (ondisk_format == 3) { + // changes: + // - FreelistManager keeps meta within bdev label + int r = _write_out_fm_meta(0); + ceph_assert(r == 0); + ondisk_format = 4; + } + // This to be the last operation + _prepare_ondisk_format_super(t); + int r = db->submit_transaction_sync(t); + ceph_assert(r == 0); + } + // done + dout(1) << __func__ << " done" << dendl; + return 0; +} + +void BlueStore::_assign_nid(TransContext *txc, OnodeRef o) +{ + if (o->onode.nid) { + ceph_assert(o->exists); + return; + } + uint64_t nid = ++nid_last; + dout(20) << __func__ << " " << nid << dendl; + o->onode.nid = nid; + txc->last_nid = nid; + o->exists = true; +} + +uint64_t BlueStore::_assign_blobid(TransContext *txc) +{ + uint64_t bid = ++blobid_last; + dout(20) << __func__ << " " << bid << dendl; + txc->last_blobid = bid; + return bid; +} + +void BlueStore::get_db_statistics(Formatter *f) +{ + db->get_statistics(f); +} + +BlueStore::TransContext *BlueStore::_txc_create( + Collection *c, OpSequencer *osr, + list<Context*> *on_commits, + TrackedOpRef osd_op) +{ + TransContext *txc = new TransContext(cct, c, osr, on_commits); + txc->t = db->get_transaction(); + +#ifdef WITH_BLKIN + if (osd_op && osd_op->pg_trace) { + txc->trace.init("TransContext", &trace_endpoint, + &osd_op->pg_trace); + txc->trace.event("txc create"); + txc->trace.keyval("txc seq", txc->seq); + } +#endif + + osr->queue_new(txc); + dout(20) << __func__ << " osr " << osr << " = " << txc + << " seq " << txc->seq << dendl; + return txc; +} + +void BlueStore::_txc_calc_cost(TransContext *txc) +{ + // one "io" for the kv commit + auto ios = 1 + txc->ioc.get_num_ios(); + auto cost = throttle_cost_per_io.load(); + txc->cost = ios * cost + txc->bytes; + txc->ios = ios; + dout(10) << __func__ << " " << txc << " cost " << txc->cost << " (" + << ios << " ios * " << cost << " + " << txc->bytes + << " bytes)" << dendl; +} + +void BlueStore::_txc_update_store_statfs(TransContext *txc) +{ + if (txc->statfs_delta.is_empty()) + return; + + logger->inc(l_bluestore_allocated, txc->statfs_delta.allocated()); + logger->inc(l_bluestore_stored, txc->statfs_delta.stored()); + logger->inc(l_bluestore_compressed, txc->statfs_delta.compressed()); + logger->inc(l_bluestore_compressed_allocated, txc->statfs_delta.compressed_allocated()); + logger->inc(l_bluestore_compressed_original, txc->statfs_delta.compressed_original()); + + bufferlist bl; + txc->statfs_delta.encode(bl); + if (per_pool_stat_collection) { + string key; + get_pool_stat_key(txc->osd_pool_id, &key); + txc->t->merge(PREFIX_STAT, key, bl); + + std::lock_guard l(vstatfs_lock); + auto& stats = osd_pools[txc->osd_pool_id]; + stats += txc->statfs_delta; + + vstatfs += txc->statfs_delta; //non-persistent in this mode + + } else { + txc->t->merge(PREFIX_STAT, BLUESTORE_GLOBAL_STATFS_KEY, bl); + + std::lock_guard l(vstatfs_lock); + vstatfs += txc->statfs_delta; + } + txc->statfs_delta.reset(); +} + +void BlueStore::_txc_state_proc(TransContext *txc) +{ + while (true) { + dout(10) << __func__ << " txc " << txc + << " " << txc->get_state_name() << dendl; + switch (txc->get_state()) { + case TransContext::STATE_PREPARE: + throttle.log_state_latency(*txc, logger, l_bluestore_state_prepare_lat); + if (txc->ioc.has_pending_aios()) { + txc->set_state(TransContext::STATE_AIO_WAIT); +#ifdef WITH_BLKIN + if (txc->trace) { + txc->trace.keyval("pending aios", txc->ioc.num_pending.load()); + } +#endif + txc->had_ios = true; + _txc_aio_submit(txc); + return; + } + // ** fall-thru ** + + case TransContext::STATE_AIO_WAIT: + { + mono_clock::duration lat = throttle.log_state_latency( + *txc, logger, l_bluestore_state_aio_wait_lat); + if (ceph::to_seconds<double>(lat) >= cct->_conf->bluestore_log_op_age) { + dout(0) << __func__ << " slow aio_wait, txc = " << txc + << ", latency = " << lat + << dendl; + } + } + + _txc_finish_io(txc); // may trigger blocked txc's too + return; + + case TransContext::STATE_IO_DONE: + ceph_assert(ceph_mutex_is_locked(txc->osr->qlock)); // see _txc_finish_io + if (txc->had_ios) { + ++txc->osr->txc_with_unstable_io; + } + throttle.log_state_latency(*txc, logger, l_bluestore_state_io_done_lat); + txc->set_state(TransContext::STATE_KV_QUEUED); + if (cct->_conf->bluestore_sync_submit_transaction) { + if (txc->last_nid >= nid_max || + txc->last_blobid >= blobid_max) { + dout(20) << __func__ + << " last_{nid,blobid} exceeds max, submit via kv thread" + << dendl; + } else if (txc->osr->kv_committing_serially) { + dout(20) << __func__ << " prior txc submitted via kv thread, us too" + << dendl; + // note: this is starvation-prone. once we have a txc in a busy + // sequencer that is committing serially it is possible to keep + // submitting new transactions fast enough that we get stuck doing + // so. the alternative is to block here... fixme? + } else if (txc->osr->txc_with_unstable_io) { + dout(20) << __func__ << " prior txc(s) with unstable ios " + << txc->osr->txc_with_unstable_io.load() << dendl; + } else if (cct->_conf->bluestore_debug_randomize_serial_transaction && + rand() % cct->_conf->bluestore_debug_randomize_serial_transaction + == 0) { + dout(20) << __func__ << " DEBUG randomly forcing submit via kv thread" + << dendl; + } else { + _txc_apply_kv(txc, true); + } + } + { + std::lock_guard l(kv_lock); + kv_queue.push_back(txc); + if (!kv_sync_in_progress) { + kv_sync_in_progress = true; + kv_cond.notify_one(); + } + if (txc->get_state() != TransContext::STATE_KV_SUBMITTED) { + kv_queue_unsubmitted.push_back(txc); + ++txc->osr->kv_committing_serially; + } + if (txc->had_ios) + kv_ios++; + kv_throttle_costs += txc->cost; + } + return; + case TransContext::STATE_KV_SUBMITTED: + _txc_committed_kv(txc); + // ** fall-thru ** + + case TransContext::STATE_KV_DONE: + throttle.log_state_latency(*txc, logger, l_bluestore_state_kv_done_lat); + if (txc->deferred_txn) { + txc->set_state(TransContext::STATE_DEFERRED_QUEUED); + _deferred_queue(txc); + return; + } + txc->set_state(TransContext::STATE_FINISHING); + break; + + case TransContext::STATE_DEFERRED_CLEANUP: + throttle.log_state_latency(*txc, logger, l_bluestore_state_deferred_cleanup_lat); + txc->set_state(TransContext::STATE_FINISHING); + // ** fall-thru ** + + case TransContext::STATE_FINISHING: + throttle.log_state_latency(*txc, logger, l_bluestore_state_finishing_lat); + _txc_finish(txc); + return; + + default: + derr << __func__ << " unexpected txc " << txc + << " state " << txc->get_state_name() << dendl; + ceph_abort_msg("unexpected txc state"); + return; + } + } +} + +void BlueStore::_txc_finish_io(TransContext *txc) +{ + dout(20) << __func__ << " " << txc << dendl; + + /* + * we need to preserve the order of kv transactions, + * even though aio will complete in any order. + */ + + OpSequencer *osr = txc->osr.get(); + std::lock_guard l(osr->qlock); + txc->set_state(TransContext::STATE_IO_DONE); + txc->ioc.release_running_aios(); + OpSequencer::q_list_t::iterator p = osr->q.iterator_to(*txc); + while (p != osr->q.begin()) { + --p; + if (p->get_state() < TransContext::STATE_IO_DONE) { + dout(20) << __func__ << " " << txc << " blocked by " << &*p << " " + << p->get_state_name() << dendl; + return; + } + if (p->get_state() > TransContext::STATE_IO_DONE) { + ++p; + break; + } + } + do { + _txc_state_proc(&*p++); + } while (p != osr->q.end() && + p->get_state() == TransContext::STATE_IO_DONE); + + if (osr->kv_submitted_waiters) { + osr->qcond.notify_all(); + } +} + +void BlueStore::_txc_write_nodes(TransContext *txc, KeyValueDB::Transaction t) +{ + dout(20) << __func__ << " txc " << txc + << " onodes " << txc->onodes + << " shared_blobs " << txc->shared_blobs + << dendl; + + // finalize onodes + for (auto o : txc->onodes) { + _record_onode(o, t); + o->flushing_count++; + } + + // objects we modified but didn't affect the onode + auto p = txc->modified_objects.begin(); + while (p != txc->modified_objects.end()) { + if (txc->onodes.count(*p) == 0) { + (*p)->flushing_count++; + ++p; + } else { + // remove dups with onodes list to avoid problems in _txc_finish + p = txc->modified_objects.erase(p); + } + } + + // finalize shared_blobs + for (auto sb : txc->shared_blobs) { + string key; + auto sbid = sb->get_sbid(); + get_shared_blob_key(sbid, &key); + if (sb->persistent->empty()) { + dout(20) << __func__ << " shared_blob 0x" + << std::hex << sbid << std::dec + << " is empty" << dendl; + t->rmkey(PREFIX_SHARED_BLOB, key); + } else { + bufferlist bl; + encode(*(sb->persistent), bl); + dout(20) << __func__ << " shared_blob 0x" + << std::hex << sbid << std::dec + << " is " << bl.length() << " " << *sb << dendl; + t->set(PREFIX_SHARED_BLOB, key, bl); + } + } +} + +void BlueStore::BSPerfTracker::update_from_perfcounters( + PerfCounters &logger) +{ + os_commit_latency_ns.consume_next( + logger.get_tavg_ns( + l_bluestore_commit_lat)); + os_apply_latency_ns.consume_next( + logger.get_tavg_ns( + l_bluestore_commit_lat)); +} + +// For every object we maintain <zone_num+oid, offset> tuple in the key-value +// store. When a new object written to a zone, we insert the corresponding +// tuple to the database. When an object is truncated, we remove the +// corresponding tuple. When an object is overwritten, we remove the old tuple +// and insert a new tuple corresponding to the new location of the object. The +// cleaner can now identify live objects within the zone <zone_num> by +// enumerating all the keys starting with <zone_num> prefix. +void BlueStore::_zoned_update_cleaning_metadata(TransContext *txc) { + for (const auto &[o, offsets] : txc->zoned_onode_to_offset_map) { + std::string key; + get_object_key(cct, o->oid, &key); + for (auto offset : offsets) { + if (offset > 0) { + bufferlist offset_bl; + encode(offset, offset_bl); + txc->t->set(_zoned_get_prefix(offset), key, offset_bl); + } else { + txc->t->rmkey(_zoned_get_prefix(-offset), key); + } + } + } +} + +std::string BlueStore::_zoned_get_prefix(uint64_t offset) { + uint64_t zone_num = offset / bdev->get_zone_size(); + std::string zone_key; + _key_encode_u64(zone_num, &zone_key); + return PREFIX_ZONED_CL_INFO + zone_key; +} + +// For now, to avoid interface changes we piggyback zone_size (in MiB) and the +// first sequential zone number onto min_alloc_size and pass it to functions +// Allocator::create and FreelistManager::create. +uint64_t BlueStore::_zoned_piggyback_device_parameters_onto(uint64_t min_alloc_size) { + uint64_t zone_size = bdev->get_zone_size(); + uint64_t zone_size_mb = zone_size / (1024 * 1024); + uint64_t first_seq_zone = bdev->get_conventional_region_size() / zone_size; + min_alloc_size |= (zone_size_mb << 32); + min_alloc_size |= (first_seq_zone << 48); + return min_alloc_size; +} + +int BlueStore::_zoned_check_config_settings() { + if (cct->_conf->bluestore_allocator != "zoned") { + dout(1) << __func__ << " The drive is HM-SMR but " + << cct->_conf->bluestore_allocator << " allocator is specified. " + << "Only zoned allocator can be used with HM-SMR drive." << dendl; + return -EINVAL; + } + + // At least for now we want to use large min_alloc_size with HM-SMR drives. + // Populating used_blocks bitset on a debug build of ceph-osd takes about 5 + // minutes with a 14 TB HM-SMR drive and 4 KiB min_alloc_size. + if (min_alloc_size < 64 * 1024) { + dout(1) << __func__ << " The drive is HM-SMR but min_alloc_size is " + << min_alloc_size << ". " + << "Please set to at least 64 KiB." << dendl; + return -EINVAL; + } + + // We don't want to defer writes with HM-SMR because it violates sequential + // write requirement. + if (prefer_deferred_size) { + dout(1) << __func__ << " The drive is HM-SMR but prefer_deferred_size is " + << prefer_deferred_size << ". " + << "Please set to 0." << dendl; + return -EINVAL; + } + return 0; +} + +void BlueStore::_txc_finalize_kv(TransContext *txc, KeyValueDB::Transaction t) +{ + dout(20) << __func__ << " txc " << txc << std::hex + << " allocated 0x" << txc->allocated + << " released 0x" << txc->released + << std::dec << dendl; + + // We have to handle the case where we allocate *and* deallocate the + // same region in this transaction. The freelist doesn't like that. + // (Actually, the only thing that cares is the BitmapFreelistManager + // debug check. But that's important.) + interval_set<uint64_t> tmp_allocated, tmp_released; + interval_set<uint64_t> *pallocated = &txc->allocated; + interval_set<uint64_t> *preleased = &txc->released; + if (!txc->allocated.empty() && !txc->released.empty()) { + interval_set<uint64_t> overlap; + overlap.intersection_of(txc->allocated, txc->released); + if (!overlap.empty()) { + tmp_allocated = txc->allocated; + tmp_allocated.subtract(overlap); + tmp_released = txc->released; + tmp_released.subtract(overlap); + dout(20) << __func__ << " overlap 0x" << std::hex << overlap + << ", new allocated 0x" << tmp_allocated + << " released 0x" << tmp_released << std::dec + << dendl; + pallocated = &tmp_allocated; + preleased = &tmp_released; + } + } + + // update freelist with non-overlap sets + for (interval_set<uint64_t>::iterator p = pallocated->begin(); + p != pallocated->end(); + ++p) { + fm->allocate(p.get_start(), p.get_len(), t); + } + for (interval_set<uint64_t>::iterator p = preleased->begin(); + p != preleased->end(); + ++p) { + dout(20) << __func__ << " release 0x" << std::hex << p.get_start() + << "~" << p.get_len() << std::dec << dendl; + fm->release(p.get_start(), p.get_len(), t); + } + + if (bdev->is_smr()) { + _zoned_update_cleaning_metadata(txc); + } + + _txc_update_store_statfs(txc); +} + +void BlueStore::_txc_apply_kv(TransContext *txc, bool sync_submit_transaction) +{ + ceph_assert(txc->get_state() == TransContext::STATE_KV_QUEUED); + { +#if defined(WITH_LTTNG) + auto start = mono_clock::now(); +#endif + +#ifdef WITH_BLKIN + if (txc->trace) { + txc->trace.event("db async submit"); + } +#endif + + int r = cct->_conf->bluestore_debug_omit_kv_commit ? 0 : db->submit_transaction(txc->t); + ceph_assert(r == 0); + txc->set_state(TransContext::STATE_KV_SUBMITTED); + if (txc->osr->kv_submitted_waiters) { + std::lock_guard l(txc->osr->qlock); + txc->osr->qcond.notify_all(); + } + +#if defined(WITH_LTTNG) + if (txc->tracing) { + tracepoint( + bluestore, + transaction_kv_submit_latency, + txc->osr->get_sequencer_id(), + txc->seq, + sync_submit_transaction, + ceph::to_seconds<double>(mono_clock::now() - start)); + } +#endif + } + + for (auto ls : { &txc->onodes, &txc->modified_objects }) { + for (auto& o : *ls) { + dout(20) << __func__ << " onode " << o << " had " << o->flushing_count + << dendl; + if (--o->flushing_count == 0 && o->waiting_count.load()) { + std::lock_guard l(o->flush_lock); + o->flush_cond.notify_all(); + } + } + } +} + +void BlueStore::_txc_committed_kv(TransContext *txc) +{ + dout(20) << __func__ << " txc " << txc << dendl; + throttle.complete_kv(*txc); + { + std::lock_guard l(txc->osr->qlock); + txc->set_state(TransContext::STATE_KV_DONE); + if (txc->ch->commit_queue) { + txc->ch->commit_queue->queue(txc->oncommits); + } else { + finisher.queue(txc->oncommits); + } + } + throttle.log_state_latency(*txc, logger, l_bluestore_state_kv_committing_lat); + log_latency_fn( + __func__, + l_bluestore_commit_lat, + mono_clock::now() - txc->start, + cct->_conf->bluestore_log_op_age, + [&](auto lat) { + return ", txc = " + stringify(txc); + } + ); +} + +void BlueStore::_txc_finish(TransContext *txc) +{ + dout(20) << __func__ << " " << txc << " onodes " << txc->onodes << dendl; + ceph_assert(txc->get_state() == TransContext::STATE_FINISHING); + + for (auto& sb : txc->shared_blobs_written) { + sb->finish_write(txc->seq); + } + txc->shared_blobs_written.clear(); + + while (!txc->removed_collections.empty()) { + _queue_reap_collection(txc->removed_collections.front()); + txc->removed_collections.pop_front(); + } + + OpSequencerRef osr = txc->osr; + bool empty = false; + bool submit_deferred = false; + OpSequencer::q_list_t releasing_txc; + { + std::lock_guard l(osr->qlock); + txc->set_state(TransContext::STATE_DONE); + bool notify = false; + while (!osr->q.empty()) { + TransContext *txc = &osr->q.front(); + dout(20) << __func__ << " txc " << txc << " " << txc->get_state_name() + << dendl; + if (txc->get_state() != TransContext::STATE_DONE) { + if (txc->get_state() == TransContext::STATE_PREPARE && + deferred_aggressive) { + // for _osr_drain_preceding() + notify = true; + } + if (txc->get_state() == TransContext::STATE_DEFERRED_QUEUED && + osr->q.size() > g_conf()->bluestore_max_deferred_txc) { + submit_deferred = true; + } + break; + } + + osr->q.pop_front(); + releasing_txc.push_back(*txc); + } + + if (osr->q.empty()) { + dout(20) << __func__ << " osr " << osr << " q now empty" << dendl; + empty = true; + } + + // only drain()/drain_preceding() need wakeup, + // other cases use kv_submitted_waiters + if (notify || empty) { + osr->qcond.notify_all(); + } + } + + while (!releasing_txc.empty()) { + // release to allocator only after all preceding txc's have also + // finished any deferred writes that potentially land in these + // blocks + auto txc = &releasing_txc.front(); + _txc_release_alloc(txc); + releasing_txc.pop_front(); + throttle.log_state_latency(*txc, logger, l_bluestore_state_done_lat); + throttle.complete(*txc); + delete txc; + } + + if (submit_deferred) { + // we're pinning memory; flush! we could be more fine-grained here but + // i'm not sure it's worth the bother. + deferred_try_submit(); + } + + if (empty && osr->zombie) { + std::lock_guard l(zombie_osr_lock); + if (zombie_osr_set.erase(osr->cid)) { + dout(10) << __func__ << " reaping empty zombie osr " << osr << dendl; + } else { + dout(10) << __func__ << " empty zombie osr " << osr << " already reaped" + << dendl; + } + } +} + +void BlueStore::_txc_release_alloc(TransContext *txc) +{ + // it's expected we're called with lazy_release_lock already taken! + if (likely(!cct->_conf->bluestore_debug_no_reuse_blocks)) { + int r = 0; + if (cct->_conf->bdev_enable_discard && cct->_conf->bdev_async_discard) { + r = bdev->queue_discard(txc->released); + if (r == 0) { + dout(10) << __func__ << "(queued) " << txc << " " << std::hex + << txc->released << std::dec << dendl; + goto out; + } + } else if (cct->_conf->bdev_enable_discard) { + for (auto p = txc->released.begin(); p != txc->released.end(); ++p) { + bdev->discard(p.get_start(), p.get_len()); + } + } + dout(10) << __func__ << "(sync) " << txc << " " << std::hex + << txc->released << std::dec << dendl; + shared_alloc.a->release(txc->released); + } + +out: + txc->allocated.clear(); + txc->released.clear(); +} + +void BlueStore::_osr_attach(Collection *c) +{ + // note: caller has RWLock on coll_map + auto q = coll_map.find(c->cid); + if (q != coll_map.end()) { + c->osr = q->second->osr; + ldout(cct, 10) << __func__ << " " << c->cid + << " reusing osr " << c->osr << " from existing coll " + << q->second << dendl; + } else { + std::lock_guard l(zombie_osr_lock); + auto p = zombie_osr_set.find(c->cid); + if (p == zombie_osr_set.end()) { + c->osr = ceph::make_ref<OpSequencer>(this, next_sequencer_id++, c->cid); + ldout(cct, 10) << __func__ << " " << c->cid + << " fresh osr " << c->osr << dendl; + } else { + c->osr = p->second; + zombie_osr_set.erase(p); + ldout(cct, 10) << __func__ << " " << c->cid + << " resurrecting zombie osr " << c->osr << dendl; + c->osr->zombie = false; + } + } +} + +void BlueStore::_osr_register_zombie(OpSequencer *osr) +{ + std::lock_guard l(zombie_osr_lock); + dout(10) << __func__ << " " << osr << " " << osr->cid << dendl; + osr->zombie = true; + auto i = zombie_osr_set.emplace(osr->cid, osr); + // this is either a new insertion or the same osr is already there + ceph_assert(i.second || i.first->second == osr); +} + +void BlueStore::_osr_drain_preceding(TransContext *txc) +{ + OpSequencer *osr = txc->osr.get(); + dout(10) << __func__ << " " << txc << " osr " << osr << dendl; + ++deferred_aggressive; // FIXME: maybe osr-local aggressive flag? + { + // submit anything pending + osr->deferred_lock.lock(); + if (osr->deferred_pending && !osr->deferred_running) { + _deferred_submit_unlock(osr); + } else { + osr->deferred_lock.unlock(); + } + } + { + // wake up any previously finished deferred events + std::lock_guard l(kv_lock); + if (!kv_sync_in_progress) { + kv_sync_in_progress = true; + kv_cond.notify_one(); + } + } + osr->drain_preceding(txc); + --deferred_aggressive; + dout(10) << __func__ << " " << osr << " done" << dendl; +} + +void BlueStore::_osr_drain(OpSequencer *osr) +{ + dout(10) << __func__ << " " << osr << dendl; + ++deferred_aggressive; // FIXME: maybe osr-local aggressive flag? + { + // submit anything pending + osr->deferred_lock.lock(); + if (osr->deferred_pending && !osr->deferred_running) { + _deferred_submit_unlock(osr); + } else { + osr->deferred_lock.unlock(); + } + } + { + // wake up any previously finished deferred events + std::lock_guard l(kv_lock); + if (!kv_sync_in_progress) { + kv_sync_in_progress = true; + kv_cond.notify_one(); + } + } + osr->drain(); + --deferred_aggressive; + dout(10) << __func__ << " " << osr << " done" << dendl; +} + +void BlueStore::_osr_drain_all() +{ + dout(10) << __func__ << dendl; + + set<OpSequencerRef> s; + vector<OpSequencerRef> zombies; + { + std::shared_lock l(coll_lock); + for (auto& i : coll_map) { + s.insert(i.second->osr); + } + } + { + std::lock_guard l(zombie_osr_lock); + for (auto& i : zombie_osr_set) { + s.insert(i.second); + zombies.push_back(i.second); + } + } + dout(20) << __func__ << " osr_set " << s << dendl; + + ++deferred_aggressive; + { + // submit anything pending + deferred_try_submit(); + } + { + // wake up any previously finished deferred events + std::lock_guard l(kv_lock); + kv_cond.notify_one(); + } + { + std::lock_guard l(kv_finalize_lock); + kv_finalize_cond.notify_one(); + } + for (auto osr : s) { + dout(20) << __func__ << " drain " << osr << dendl; + osr->drain(); + } + --deferred_aggressive; + + { + std::lock_guard l(zombie_osr_lock); + for (auto& osr : zombies) { + if (zombie_osr_set.erase(osr->cid)) { + dout(10) << __func__ << " reaping empty zombie osr " << osr << dendl; + ceph_assert(osr->q.empty()); + } else if (osr->zombie) { + dout(10) << __func__ << " empty zombie osr " << osr + << " already reaped" << dendl; + ceph_assert(osr->q.empty()); + } else { + dout(10) << __func__ << " empty zombie osr " << osr + << " resurrected" << dendl; + } + } + } + + dout(10) << __func__ << " done" << dendl; +} + + +void BlueStore::_kv_start() +{ + dout(10) << __func__ << dendl; + + finisher.start(); + kv_sync_thread.create("bstore_kv_sync"); + kv_finalize_thread.create("bstore_kv_final"); +} + +void BlueStore::_kv_stop() +{ + dout(10) << __func__ << dendl; + { + std::unique_lock l{kv_lock}; + while (!kv_sync_started) { + kv_cond.wait(l); + } + kv_stop = true; + kv_cond.notify_all(); + } + { + std::unique_lock l{kv_finalize_lock}; + while (!kv_finalize_started) { + kv_finalize_cond.wait(l); + } + kv_finalize_stop = true; + kv_finalize_cond.notify_all(); + } + kv_sync_thread.join(); + kv_finalize_thread.join(); + ceph_assert(removed_collections.empty()); + { + std::lock_guard l(kv_lock); + kv_stop = false; + } + { + std::lock_guard l(kv_finalize_lock); + kv_finalize_stop = false; + } + dout(10) << __func__ << " stopping finishers" << dendl; + finisher.wait_for_empty(); + finisher.stop(); + dout(10) << __func__ << " stopped" << dendl; +} + +void BlueStore::_kv_sync_thread() +{ + dout(10) << __func__ << " start" << dendl; + deque<DeferredBatch*> deferred_stable_queue; ///< deferred ios done + stable + std::unique_lock l{kv_lock}; + ceph_assert(!kv_sync_started); + kv_sync_started = true; + kv_cond.notify_all(); + + auto t0 = mono_clock::now(); + timespan twait = ceph::make_timespan(0); + size_t kv_submitted = 0; + + while (true) { + auto period = cct->_conf->bluestore_kv_sync_util_logging_s; + auto observation_period = + ceph::make_timespan(period); + auto elapsed = mono_clock::now() - t0; + if (period && elapsed >= observation_period) { + dout(5) << __func__ << " utilization: idle " + << twait << " of " << elapsed + << ", submitted: " << kv_submitted + <<dendl; + t0 = mono_clock::now(); + twait = ceph::make_timespan(0); + kv_submitted = 0; + } + ceph_assert(kv_committing.empty()); + if (kv_queue.empty() && + ((deferred_done_queue.empty() && deferred_stable_queue.empty()) || + !deferred_aggressive)) { + if (kv_stop) + break; + dout(20) << __func__ << " sleep" << dendl; + auto t = mono_clock::now(); + kv_sync_in_progress = false; + kv_cond.wait(l); + twait += mono_clock::now() - t; + + dout(20) << __func__ << " wake" << dendl; + } else { + deque<TransContext*> kv_submitting; + deque<DeferredBatch*> deferred_done, deferred_stable; + uint64_t aios = 0, costs = 0; + + dout(20) << __func__ << " committing " << kv_queue.size() + << " submitting " << kv_queue_unsubmitted.size() + << " deferred done " << deferred_done_queue.size() + << " stable " << deferred_stable_queue.size() + << dendl; + kv_committing.swap(kv_queue); + kv_submitting.swap(kv_queue_unsubmitted); + deferred_done.swap(deferred_done_queue); + deferred_stable.swap(deferred_stable_queue); + aios = kv_ios; + costs = kv_throttle_costs; + kv_ios = 0; + kv_throttle_costs = 0; + l.unlock(); + + dout(30) << __func__ << " committing " << kv_committing << dendl; + dout(30) << __func__ << " submitting " << kv_submitting << dendl; + dout(30) << __func__ << " deferred_done " << deferred_done << dendl; + dout(30) << __func__ << " deferred_stable " << deferred_stable << dendl; + + auto start = mono_clock::now(); + + bool force_flush = false; + // if bluefs is sharing the same device as data (only), then we + // can rely on the bluefs commit to flush the device and make + // deferred aios stable. that means that if we do have done deferred + // txcs AND we are not on a single device, we need to force a flush. + if (bluefs && bluefs_layout.single_shared_device()) { + if (aios) { + force_flush = true; + } else if (kv_committing.empty() && deferred_stable.empty()) { + force_flush = true; // there's nothing else to commit! + } else if (deferred_aggressive) { + force_flush = true; + } + } else { + if (aios || !deferred_done.empty()) { + force_flush = true; + } else { + dout(20) << __func__ << " skipping flush (no aios, no deferred_done)" << dendl; + } + } + + if (force_flush) { + dout(20) << __func__ << " num_aios=" << aios + << " force_flush=" << (int)force_flush + << ", flushing, deferred done->stable" << dendl; + // flush/barrier on block device + bdev->flush(); + + // if we flush then deferred done are now deferred stable + deferred_stable.insert(deferred_stable.end(), deferred_done.begin(), + deferred_done.end()); + deferred_done.clear(); + } + auto after_flush = mono_clock::now(); + + // we will use one final transaction to force a sync + KeyValueDB::Transaction synct = db->get_transaction(); + + // increase {nid,blobid}_max? note that this covers both the + // case where we are approaching the max and the case we passed + // it. in either case, we increase the max in the earlier txn + // we submit. + uint64_t new_nid_max = 0, new_blobid_max = 0; + if (nid_last + cct->_conf->bluestore_nid_prealloc/2 > nid_max) { + KeyValueDB::Transaction t = + kv_submitting.empty() ? synct : kv_submitting.front()->t; + new_nid_max = nid_last + cct->_conf->bluestore_nid_prealloc; + bufferlist bl; + encode(new_nid_max, bl); + t->set(PREFIX_SUPER, "nid_max", bl); + dout(10) << __func__ << " new_nid_max " << new_nid_max << dendl; + } + if (blobid_last + cct->_conf->bluestore_blobid_prealloc/2 > blobid_max) { + KeyValueDB::Transaction t = + kv_submitting.empty() ? synct : kv_submitting.front()->t; + new_blobid_max = blobid_last + cct->_conf->bluestore_blobid_prealloc; + bufferlist bl; + encode(new_blobid_max, bl); + t->set(PREFIX_SUPER, "blobid_max", bl); + dout(10) << __func__ << " new_blobid_max " << new_blobid_max << dendl; + } + + for (auto txc : kv_committing) { + throttle.log_state_latency(*txc, logger, l_bluestore_state_kv_queued_lat); + if (txc->get_state() == TransContext::STATE_KV_QUEUED) { + ++kv_submitted; + _txc_apply_kv(txc, false); + --txc->osr->kv_committing_serially; + } else { + ceph_assert(txc->get_state() == TransContext::STATE_KV_SUBMITTED); + } + if (txc->had_ios) { + --txc->osr->txc_with_unstable_io; + } + } + + // release throttle *before* we commit. this allows new ops + // to be prepared and enter pipeline while we are waiting on + // the kv commit sync/flush. then hopefully on the next + // iteration there will already be ops awake. otherwise, we + // end up going to sleep, and then wake up when the very first + // transaction is ready for commit. + throttle.release_kv_throttle(costs); + + // cleanup sync deferred keys + for (auto b : deferred_stable) { + for (auto& txc : b->txcs) { + bluestore_deferred_transaction_t& wt = *txc.deferred_txn; + ceph_assert(wt.released.empty()); // only kraken did this + string key; + get_deferred_key(wt.seq, &key); + synct->rm_single_key(PREFIX_DEFERRED, key); + } + } + +#if defined(WITH_LTTNG) + auto sync_start = mono_clock::now(); +#endif + // submit synct synchronously (block and wait for it to commit) + int r = cct->_conf->bluestore_debug_omit_kv_commit ? 0 : db->submit_transaction_sync(synct); + ceph_assert(r == 0); + +#ifdef WITH_BLKIN + for (auto txc : kv_committing) { + if (txc->trace) { + txc->trace.event("db sync submit"); + txc->trace.keyval("kv_committing size", kv_committing.size()); + } + } +#endif + + int committing_size = kv_committing.size(); + int deferred_size = deferred_stable.size(); + +#if defined(WITH_LTTNG) + double sync_latency = ceph::to_seconds<double>(mono_clock::now() - sync_start); + for (auto txc: kv_committing) { + if (txc->tracing) { + tracepoint( + bluestore, + transaction_kv_sync_latency, + txc->osr->get_sequencer_id(), + txc->seq, + kv_committing.size(), + deferred_done.size(), + deferred_stable.size(), + sync_latency); + } + } +#endif + + { + std::unique_lock m{kv_finalize_lock}; + if (kv_committing_to_finalize.empty()) { + kv_committing_to_finalize.swap(kv_committing); + } else { + kv_committing_to_finalize.insert( + kv_committing_to_finalize.end(), + kv_committing.begin(), + kv_committing.end()); + kv_committing.clear(); + } + if (deferred_stable_to_finalize.empty()) { + deferred_stable_to_finalize.swap(deferred_stable); + } else { + deferred_stable_to_finalize.insert( + deferred_stable_to_finalize.end(), + deferred_stable.begin(), + deferred_stable.end()); + deferred_stable.clear(); + } + if (!kv_finalize_in_progress) { + kv_finalize_in_progress = true; + kv_finalize_cond.notify_one(); + } + } + + if (new_nid_max) { + nid_max = new_nid_max; + dout(10) << __func__ << " nid_max now " << nid_max << dendl; + } + if (new_blobid_max) { + blobid_max = new_blobid_max; + dout(10) << __func__ << " blobid_max now " << blobid_max << dendl; + } + + { + auto finish = mono_clock::now(); + ceph::timespan dur_flush = after_flush - start; + ceph::timespan dur_kv = finish - after_flush; + ceph::timespan dur = finish - start; + dout(20) << __func__ << " committed " << committing_size + << " cleaned " << deferred_size + << " in " << dur + << " (" << dur_flush << " flush + " << dur_kv << " kv commit)" + << dendl; + log_latency("kv_flush", + l_bluestore_kv_flush_lat, + dur_flush, + cct->_conf->bluestore_log_op_age); + log_latency("kv_commit", + l_bluestore_kv_commit_lat, + dur_kv, + cct->_conf->bluestore_log_op_age); + log_latency("kv_sync", + l_bluestore_kv_sync_lat, + dur, + cct->_conf->bluestore_log_op_age); + } + + l.lock(); + // previously deferred "done" are now "stable" by virtue of this + // commit cycle. + deferred_stable_queue.swap(deferred_done); + } + } + dout(10) << __func__ << " finish" << dendl; + kv_sync_started = false; +} + +void BlueStore::_kv_finalize_thread() +{ + deque<TransContext*> kv_committed; + deque<DeferredBatch*> deferred_stable; + dout(10) << __func__ << " start" << dendl; + std::unique_lock l(kv_finalize_lock); + ceph_assert(!kv_finalize_started); + kv_finalize_started = true; + kv_finalize_cond.notify_all(); + while (true) { + ceph_assert(kv_committed.empty()); + ceph_assert(deferred_stable.empty()); + if (kv_committing_to_finalize.empty() && + deferred_stable_to_finalize.empty()) { + if (kv_finalize_stop) + break; + dout(20) << __func__ << " sleep" << dendl; + kv_finalize_in_progress = false; + kv_finalize_cond.wait(l); + dout(20) << __func__ << " wake" << dendl; + } else { + kv_committed.swap(kv_committing_to_finalize); + deferred_stable.swap(deferred_stable_to_finalize); + l.unlock(); + dout(20) << __func__ << " kv_committed " << kv_committed << dendl; + dout(20) << __func__ << " deferred_stable " << deferred_stable << dendl; + + auto start = mono_clock::now(); + + while (!kv_committed.empty()) { + TransContext *txc = kv_committed.front(); + ceph_assert(txc->get_state() == TransContext::STATE_KV_SUBMITTED); + _txc_state_proc(txc); + kv_committed.pop_front(); + } + + for (auto b : deferred_stable) { + auto p = b->txcs.begin(); + while (p != b->txcs.end()) { + TransContext *txc = &*p; + p = b->txcs.erase(p); // unlink here because + _txc_state_proc(txc); // this may destroy txc + } + delete b; + } + deferred_stable.clear(); + + if (!deferred_aggressive) { + if (deferred_queue_size >= deferred_batch_ops.load() || + throttle.should_submit_deferred()) { + deferred_try_submit(); + } + } + + // this is as good a place as any ... + _reap_collections(); + + logger->set(l_bluestore_fragmentation, + (uint64_t)(shared_alloc.a->get_fragmentation() * 1000)); + + log_latency("kv_final", + l_bluestore_kv_final_lat, + mono_clock::now() - start, + cct->_conf->bluestore_log_op_age); + + l.lock(); + } + } + dout(10) << __func__ << " finish" << dendl; + kv_finalize_started = false; +} + +void BlueStore::_zoned_cleaner_start() { + dout(10) << __func__ << dendl; + + zoned_cleaner_thread.create("bstore_zcleaner"); +} + +void BlueStore::_zoned_cleaner_stop() { + dout(10) << __func__ << dendl; + { + std::unique_lock l{zoned_cleaner_lock}; + while (!zoned_cleaner_started) { + zoned_cleaner_cond.wait(l); + } + zoned_cleaner_stop = true; + zoned_cleaner_cond.notify_all(); + } + zoned_cleaner_thread.join(); + { + std::lock_guard l{zoned_cleaner_lock}; + zoned_cleaner_stop = false; + } + dout(10) << __func__ << " done" << dendl; +} + +void BlueStore::_zoned_cleaner_thread() { + dout(10) << __func__ << " start" << dendl; + std::unique_lock l{zoned_cleaner_lock}; + ceph_assert(!zoned_cleaner_started); + zoned_cleaner_started = true; + zoned_cleaner_cond.notify_all(); + std::deque<uint64_t> zones_to_clean; + while (true) { + if (zoned_cleaner_queue.empty()) { + if (zoned_cleaner_stop) { + break; + } + dout(20) << __func__ << " sleep" << dendl; + zoned_cleaner_cond.wait(l); + dout(20) << __func__ << " wake" << dendl; + } else { + zones_to_clean.swap(zoned_cleaner_queue); + l.unlock(); + while (!zones_to_clean.empty()) { + _zoned_clean_zone(zones_to_clean.front()); + zones_to_clean.pop_front(); + } + l.lock(); + } + } + dout(10) << __func__ << " finish" << dendl; + zoned_cleaner_started = false; +} + +void BlueStore::_zoned_clean_zone(uint64_t zone_num) { + dout(10) << __func__ << " cleaning zone " << zone_num << dendl; +} + +bluestore_deferred_op_t *BlueStore::_get_deferred_op( + TransContext *txc, uint64_t len) +{ + if (!txc->deferred_txn) { + txc->deferred_txn = new bluestore_deferred_transaction_t; + } + txc->deferred_txn->ops.push_back(bluestore_deferred_op_t()); + logger->inc(l_bluestore_write_deferred); + logger->inc(l_bluestore_write_deferred_bytes, len); + return &txc->deferred_txn->ops.back(); +} + +void BlueStore::_deferred_queue(TransContext *txc) +{ + dout(20) << __func__ << " txc " << txc << " osr " << txc->osr << dendl; + + DeferredBatch *tmp; + txc->osr->deferred_lock.lock(); + { + if (!txc->osr->deferred_pending) { + tmp = new DeferredBatch(cct, txc->osr.get()); + } else { + tmp = txc->osr->deferred_pending; + } + } + + tmp->txcs.push_back(*txc); + bluestore_deferred_transaction_t& wt = *txc->deferred_txn; + for (auto opi = wt.ops.begin(); opi != wt.ops.end(); ++opi) { + const auto& op = *opi; + ceph_assert(op.op == bluestore_deferred_op_t::OP_WRITE); + bufferlist::const_iterator p = op.data.begin(); + for (auto e : op.extents) { + tmp->prepare_write(cct, wt.seq, e.offset, e.length, p); + } + } + + { + ++deferred_queue_size; + txc->osr->deferred_pending = tmp; + // condition "tmp->txcs.size() == 1" mean deferred_pending was originally empty. + // So we should add osr into deferred_queue. + if (!txc->osr->deferred_running && (tmp->txcs.size() == 1)) { + deferred_lock.lock(); + deferred_queue.push_back(*txc->osr); + deferred_lock.unlock(); + } + + if (deferred_aggressive && + !txc->osr->deferred_running) { + _deferred_submit_unlock(txc->osr.get()); + } else { + txc->osr->deferred_lock.unlock(); + } + } + } + +void BlueStore::deferred_try_submit() +{ + dout(20) << __func__ << " " << deferred_queue.size() << " osrs, " + << deferred_queue_size << " txcs" << dendl; + vector<OpSequencerRef> osrs; + + { + std::lock_guard l(deferred_lock); + osrs.reserve(deferred_queue.size()); + for (auto& osr : deferred_queue) { + osrs.push_back(&osr); + } + } + + for (auto& osr : osrs) { + osr->deferred_lock.lock(); + if (osr->deferred_pending) { + if (!osr->deferred_running) { + _deferred_submit_unlock(osr.get()); + } else { + osr->deferred_lock.unlock(); + dout(20) << __func__ << " osr " << osr << " already has running" + << dendl; + } + } else { + osr->deferred_lock.unlock(); + dout(20) << __func__ << " osr " << osr << " has no pending" << dendl; + } + } + + { + std::lock_guard l(deferred_lock); + deferred_last_submitted = ceph_clock_now(); + } +} + +void BlueStore::_deferred_submit_unlock(OpSequencer *osr) +{ + dout(10) << __func__ << " osr " << osr + << " " << osr->deferred_pending->iomap.size() << " ios pending " + << dendl; + ceph_assert(osr->deferred_pending); + ceph_assert(!osr->deferred_running); + + auto b = osr->deferred_pending; + deferred_queue_size -= b->seq_bytes.size(); + ceph_assert(deferred_queue_size >= 0); + + osr->deferred_running = osr->deferred_pending; + osr->deferred_pending = nullptr; + + osr->deferred_lock.unlock(); + + for (auto& txc : b->txcs) { + throttle.log_state_latency(txc, logger, l_bluestore_state_deferred_queued_lat); + } + uint64_t start = 0, pos = 0; + bufferlist bl; + auto i = b->iomap.begin(); + while (true) { + if (i == b->iomap.end() || i->first != pos) { + if (bl.length()) { + dout(20) << __func__ << " write 0x" << std::hex + << start << "~" << bl.length() + << " crc " << bl.crc32c(-1) << std::dec << dendl; + if (!g_conf()->bluestore_debug_omit_block_device_write) { + logger->inc(l_bluestore_deferred_write_ops); + logger->inc(l_bluestore_deferred_write_bytes, bl.length()); + int r = bdev->aio_write(start, bl, &b->ioc, false); + ceph_assert(r == 0); + } + } + if (i == b->iomap.end()) { + break; + } + start = 0; + pos = i->first; + bl.clear(); + } + dout(20) << __func__ << " seq " << i->second.seq << " 0x" + << std::hex << pos << "~" << i->second.bl.length() << std::dec + << dendl; + if (!bl.length()) { + start = pos; + } + pos += i->second.bl.length(); + bl.claim_append(i->second.bl); + ++i; + } + + bdev->aio_submit(&b->ioc); +} + +struct C_DeferredTrySubmit : public Context { + BlueStore *store; + C_DeferredTrySubmit(BlueStore *s) : store(s) {} + void finish(int r) { + store->deferred_try_submit(); + } +}; + +void BlueStore::_deferred_aio_finish(OpSequencer *osr) +{ + dout(10) << __func__ << " osr " << osr << dendl; + ceph_assert(osr->deferred_running); + DeferredBatch *b = osr->deferred_running; + + { + osr->deferred_lock.lock(); + ceph_assert(osr->deferred_running == b); + osr->deferred_running = nullptr; + if (!osr->deferred_pending) { + dout(20) << __func__ << " dequeueing" << dendl; + { + deferred_lock.lock(); + auto q = deferred_queue.iterator_to(*osr); + deferred_queue.erase(q); + deferred_lock.unlock(); + } + osr->deferred_lock.unlock(); + } else { + osr->deferred_lock.unlock(); + if (deferred_aggressive) { + dout(20) << __func__ << " queuing async deferred_try_submit" << dendl; + finisher.queue(new C_DeferredTrySubmit(this)); + } else { + dout(20) << __func__ << " leaving queued, more pending" << dendl; + } + } + } + + { + uint64_t costs = 0; + { + for (auto& i : b->txcs) { + TransContext *txc = &i; + throttle.log_state_latency(*txc, logger, l_bluestore_state_deferred_aio_wait_lat); + txc->set_state(TransContext::STATE_DEFERRED_CLEANUP); + costs += txc->cost; + } + } + throttle.release_deferred_throttle(costs); + } + + { + std::lock_guard l(kv_lock); + deferred_done_queue.emplace_back(b); + + // in the normal case, do not bother waking up the kv thread; it will + // catch us on the next commit anyway. + if (deferred_aggressive && !kv_sync_in_progress) { + kv_sync_in_progress = true; + kv_cond.notify_one(); + } + } +} + +int BlueStore::_deferred_replay() +{ + dout(10) << __func__ << " start" << dendl; + int count = 0; + int r = 0; + interval_set<uint64_t> bluefs_extents; + if (bluefs) { + bluefs->get_block_extents(bluefs_layout.shared_bdev, &bluefs_extents); + } + CollectionRef ch = _get_collection(coll_t::meta()); + bool fake_ch = false; + if (!ch) { + // hmm, replaying initial mkfs? + ch = static_cast<Collection*>(create_new_collection(coll_t::meta()).get()); + fake_ch = true; + } + OpSequencer *osr = static_cast<OpSequencer*>(ch->osr.get()); + KeyValueDB::Iterator it = db->get_iterator(PREFIX_DEFERRED); + for (it->lower_bound(string()); it->valid(); it->next(), ++count) { + dout(20) << __func__ << " replay " << pretty_binary_string(it->key()) + << dendl; + bluestore_deferred_transaction_t *deferred_txn = + new bluestore_deferred_transaction_t; + bufferlist bl = it->value(); + auto p = bl.cbegin(); + try { + decode(*deferred_txn, p); + } catch (ceph::buffer::error& e) { + derr << __func__ << " failed to decode deferred txn " + << pretty_binary_string(it->key()) << dendl; + delete deferred_txn; + r = -EIO; + goto out; + } + bool has_some = _eliminate_outdated_deferred(deferred_txn, bluefs_extents); + if (has_some) { + TransContext *txc = _txc_create(ch.get(), osr, nullptr); + txc->deferred_txn = deferred_txn; + txc->set_state(TransContext::STATE_KV_DONE); + _txc_state_proc(txc); + } else { + delete deferred_txn; + } + } + out: + dout(20) << __func__ << " draining osr" << dendl; + _osr_register_zombie(osr); + _osr_drain_all(); + if (fake_ch) { + new_coll_map.clear(); + } + dout(10) << __func__ << " completed " << count << " events" << dendl; + return r; +} + +bool BlueStore::_eliminate_outdated_deferred(bluestore_deferred_transaction_t* deferred_txn, + interval_set<uint64_t>& bluefs_extents) +{ + bool has_some = false; + dout(30) << __func__ << " bluefs_extents: " << std::hex << bluefs_extents << std::dec << dendl; + auto it = deferred_txn->ops.begin(); + while (it != deferred_txn->ops.end()) { + // We process a pair of _data_/_extents_ (here: it->data/it->extents) + // by eliminating _extents_ that belong to bluefs, removing relevant parts of _data_ + // example: + // +------------+---------------+---------------+---------------+ + // | data | aaaaaaaabbbbb | bbbbcccccdddd | ddddeeeeeefff | + // | extent | 40000 - 44000 | 50000 - 58000 | 58000 - 60000 | + // | in bluefs? | no | yes | no | + // +------------+---------------+---------------+---------------+ + // result: + // +------------+---------------+---------------+ + // | data | aaaaaaaabbbbb | ddddeeeeeefff | + // | extent | 40000 - 44000 | 58000 - 60000 | + // +------------+---------------+---------------+ + PExtentVector new_extents; + ceph::buffer::list new_data; + uint32_t data_offset = 0; // this tracks location of extent 'e' inside it->data + dout(30) << __func__ << " input extents: " << it->extents << dendl; + for (auto& e: it->extents) { + interval_set<uint64_t> region; + region.insert(e.offset, e.length); + + auto mi = bluefs_extents.lower_bound(e.offset); + if (mi != bluefs_extents.begin()) { + --mi; + if (mi.get_end() <= e.offset) { + ++mi; + } + } + while (mi != bluefs_extents.end() && mi.get_start() < e.offset + e.length) { + // The interval_set does not like (asserts) when we erase interval that does not exist. + // Hence we do we implement (region-mi) by ((region+mi)-mi). + region.union_insert(mi.get_start(), mi.get_len()); + region.erase(mi.get_start(), mi.get_len()); + ++mi; + } + // 'region' is now a subset of e, without parts used by bluefs + // we trim coresponding parts from it->data (actally constructing new_data / new_extents) + for (auto ki = region.begin(); ki != region.end(); ki++) { + ceph::buffer::list chunk; + // A chunk from it->data; data_offset is a an offset where 'e' was located; + // 'ki.get_start() - e.offset' is an offset of ki inside 'e'. + chunk.substr_of(it->data, data_offset + (ki.get_start() - e.offset), ki.get_len()); + new_data.claim_append(chunk); + new_extents.emplace_back(bluestore_pextent_t(ki.get_start(), ki.get_len())); + } + data_offset += e.length; + } + dout(30) << __func__ << " output extents: " << new_extents << dendl; + if (it->data.length() != new_data.length()) { + dout(10) << __func__ << " trimmed deferred extents: " << it->extents << "->" << new_extents << dendl; + } + if (new_extents.size() == 0) { + it = deferred_txn->ops.erase(it); + } else { + has_some = true; + std::swap(it->extents, new_extents); + std::swap(it->data, new_data); + ++it; + } + } + return has_some; +} + +// --------------------------- +// transactions + +int BlueStore::queue_transactions( + CollectionHandle& ch, + vector<Transaction>& tls, + TrackedOpRef op, + ThreadPool::TPHandle *handle) +{ + FUNCTRACE(cct); + list<Context *> on_applied, on_commit, on_applied_sync; + ObjectStore::Transaction::collect_contexts( + tls, &on_applied, &on_commit, &on_applied_sync); + + auto start = mono_clock::now(); + + Collection *c = static_cast<Collection*>(ch.get()); + OpSequencer *osr = c->osr.get(); + dout(10) << __func__ << " ch " << c << " " << c->cid << dendl; + + // prepare + TransContext *txc = _txc_create(static_cast<Collection*>(ch.get()), osr, + &on_commit, op); + + // With HM-SMR drives (and ZNS SSDs) we want the I/O allocation and I/O + // submission to happen atomically because if I/O submission happens in a + // different order than I/O allocation, we end up issuing non-sequential + // writes to the drive. This is a temporary solution until ZONE APPEND + // support matures in the kernel. For more information please see: + // https://www.usenix.org/conference/vault20/presentation/bjorling + if (bdev->is_smr()) { + atomic_alloc_and_submit_lock.lock(); + } + for (vector<Transaction>::iterator p = tls.begin(); p != tls.end(); ++p) { + txc->bytes += (*p).get_num_bytes(); + _txc_add_transaction(txc, &(*p)); + } + _txc_calc_cost(txc); + + _txc_write_nodes(txc, txc->t); + + // journal deferred items + if (txc->deferred_txn) { + txc->deferred_txn->seq = ++deferred_seq; + bufferlist bl; + encode(*txc->deferred_txn, bl); + string key; + get_deferred_key(txc->deferred_txn->seq, &key); + txc->t->set(PREFIX_DEFERRED, key, bl); + } + + _txc_finalize_kv(txc, txc->t); + +#ifdef WITH_BLKIN + if (txc->trace) { + txc->trace.event("txc encode finished"); + } +#endif + + if (handle) + handle->suspend_tp_timeout(); + + auto tstart = mono_clock::now(); + + if (!throttle.try_start_transaction( + *db, + *txc, + tstart)) { + // ensure we do not block here because of deferred writes + dout(10) << __func__ << " failed get throttle_deferred_bytes, aggressive" + << dendl; + ++deferred_aggressive; + deferred_try_submit(); + { + // wake up any previously finished deferred events + std::lock_guard l(kv_lock); + if (!kv_sync_in_progress) { + kv_sync_in_progress = true; + kv_cond.notify_one(); + } + } + throttle.finish_start_transaction(*db, *txc, tstart); + --deferred_aggressive; + } + auto tend = mono_clock::now(); + + if (handle) + handle->reset_tp_timeout(); + + logger->inc(l_bluestore_txc); + + // execute (start) + _txc_state_proc(txc); + + if (bdev->is_smr()) { + atomic_alloc_and_submit_lock.unlock(); + } + + // we're immediately readable (unlike FileStore) + for (auto c : on_applied_sync) { + c->complete(0); + } + if (!on_applied.empty()) { + if (c->commit_queue) { + c->commit_queue->queue(on_applied); + } else { + finisher.queue(on_applied); + } + } + +#ifdef WITH_BLKIN + if (txc->trace) { + txc->trace.event("txc applied"); + } +#endif + + log_latency("submit_transact", + l_bluestore_submit_lat, + mono_clock::now() - start, + cct->_conf->bluestore_log_op_age); + log_latency("throttle_transact", + l_bluestore_throttle_lat, + tend - tstart, + cct->_conf->bluestore_log_op_age); + return 0; +} + +void BlueStore::_txc_aio_submit(TransContext *txc) +{ + dout(10) << __func__ << " txc " << txc << dendl; + bdev->aio_submit(&txc->ioc); +} + +void BlueStore::_txc_add_transaction(TransContext *txc, Transaction *t) +{ + Transaction::iterator i = t->begin(); + + _dump_transaction<30>(cct, t); + + vector<CollectionRef> cvec(i.colls.size()); + unsigned j = 0; + for (vector<coll_t>::iterator p = i.colls.begin(); p != i.colls.end(); + ++p, ++j) { + cvec[j] = _get_collection(*p); + } + + vector<OnodeRef> ovec(i.objects.size()); + + for (int pos = 0; i.have_op(); ++pos) { + Transaction::Op *op = i.decode_op(); + int r = 0; + + // no coll or obj + if (op->op == Transaction::OP_NOP) + continue; + + + // collection operations + CollectionRef &c = cvec[op->cid]; + + // initialize osd_pool_id and do a smoke test that all collections belong + // to the same pool + spg_t pgid; + if (!!c ? c->cid.is_pg(&pgid) : false) { + ceph_assert(txc->osd_pool_id == META_POOL_ID || + txc->osd_pool_id == pgid.pool()); + txc->osd_pool_id = pgid.pool(); + } + + switch (op->op) { + case Transaction::OP_RMCOLL: + { + const coll_t &cid = i.get_cid(op->cid); + r = _remove_collection(txc, cid, &c); + if (!r) + continue; + } + break; + + case Transaction::OP_MKCOLL: + { + ceph_assert(!c); + const coll_t &cid = i.get_cid(op->cid); + r = _create_collection(txc, cid, op->split_bits, &c); + if (!r) + continue; + } + break; + + case Transaction::OP_SPLIT_COLLECTION: + ceph_abort_msg("deprecated"); + break; + + case Transaction::OP_SPLIT_COLLECTION2: + { + uint32_t bits = op->split_bits; + uint32_t rem = op->split_rem; + r = _split_collection(txc, c, cvec[op->dest_cid], bits, rem); + if (!r) + continue; + } + break; + + case Transaction::OP_MERGE_COLLECTION: + { + uint32_t bits = op->split_bits; + r = _merge_collection(txc, &c, cvec[op->dest_cid], bits); + if (!r) + continue; + } + break; + + case Transaction::OP_COLL_HINT: + { + uint32_t type = op->hint; + bufferlist hint; + i.decode_bl(hint); + auto hiter = hint.cbegin(); + if (type == Transaction::COLL_HINT_EXPECTED_NUM_OBJECTS) { + uint32_t pg_num; + uint64_t num_objs; + decode(pg_num, hiter); + decode(num_objs, hiter); + dout(10) << __func__ << " collection hint objects is a no-op, " + << " pg_num " << pg_num << " num_objects " << num_objs + << dendl; + } else { + // Ignore the hint + dout(10) << __func__ << " unknown collection hint " << type << dendl; + } + continue; + } + break; + + case Transaction::OP_COLL_SETATTR: + r = -EOPNOTSUPP; + break; + + case Transaction::OP_COLL_RMATTR: + r = -EOPNOTSUPP; + break; + + case Transaction::OP_COLL_RENAME: + ceph_abort_msg("not implemented"); + break; + } + if (r < 0) { + derr << __func__ << " error " << cpp_strerror(r) + << " not handled on operation " << op->op + << " (op " << pos << ", counting from 0)" << dendl; + _dump_transaction<0>(cct, t); + ceph_abort_msg("unexpected error"); + } + + // these operations implicity create the object + bool create = false; + if (op->op == Transaction::OP_TOUCH || + op->op == Transaction::OP_CREATE || + op->op == Transaction::OP_WRITE || + op->op == Transaction::OP_ZERO) { + create = true; + } + + // object operations + std::unique_lock l(c->lock); + OnodeRef &o = ovec[op->oid]; + if (!o) { + ghobject_t oid = i.get_oid(op->oid); + o = c->get_onode(oid, create, op->op == Transaction::OP_CREATE); + } + if (!create && (!o || !o->exists)) { + dout(10) << __func__ << " op " << op->op << " got ENOENT on " + << i.get_oid(op->oid) << dendl; + r = -ENOENT; + goto endop; + } + + switch (op->op) { + case Transaction::OP_CREATE: + case Transaction::OP_TOUCH: + r = _touch(txc, c, o); + break; + + case Transaction::OP_WRITE: + { + uint64_t off = op->off; + uint64_t len = op->len; + uint32_t fadvise_flags = i.get_fadvise_flags(); + bufferlist bl; + i.decode_bl(bl); + r = _write(txc, c, o, off, len, bl, fadvise_flags); + } + break; + + case Transaction::OP_ZERO: + { + uint64_t off = op->off; + uint64_t len = op->len; + r = _zero(txc, c, o, off, len); + } + break; + + case Transaction::OP_TRIMCACHE: + { + // deprecated, no-op + } + break; + + case Transaction::OP_TRUNCATE: + { + uint64_t off = op->off; + r = _truncate(txc, c, o, off); + } + break; + + case Transaction::OP_REMOVE: + { + r = _remove(txc, c, o); + } + break; + + case Transaction::OP_SETATTR: + { + string name = i.decode_string(); + bufferptr bp; + i.decode_bp(bp); + r = _setattr(txc, c, o, name, bp); + } + break; + + case Transaction::OP_SETATTRS: + { + map<string, bufferptr> aset; + i.decode_attrset(aset); + r = _setattrs(txc, c, o, aset); + } + break; + + case Transaction::OP_RMATTR: + { + string name = i.decode_string(); + r = _rmattr(txc, c, o, name); + } + break; + + case Transaction::OP_RMATTRS: + { + r = _rmattrs(txc, c, o); + } + break; + + case Transaction::OP_CLONE: + { + OnodeRef& no = ovec[op->dest_oid]; + if (!no) { + const ghobject_t& noid = i.get_oid(op->dest_oid); + no = c->get_onode(noid, true); + } + r = _clone(txc, c, o, no); + } + break; + + case Transaction::OP_CLONERANGE: + ceph_abort_msg("deprecated"); + break; + + case Transaction::OP_CLONERANGE2: + { + OnodeRef& no = ovec[op->dest_oid]; + if (!no) { + const ghobject_t& noid = i.get_oid(op->dest_oid); + no = c->get_onode(noid, true); + } + uint64_t srcoff = op->off; + uint64_t len = op->len; + uint64_t dstoff = op->dest_off; + r = _clone_range(txc, c, o, no, srcoff, len, dstoff); + } + break; + + case Transaction::OP_COLL_ADD: + ceph_abort_msg("not implemented"); + break; + + case Transaction::OP_COLL_REMOVE: + ceph_abort_msg("not implemented"); + break; + + case Transaction::OP_COLL_MOVE: + ceph_abort_msg("deprecated"); + break; + + case Transaction::OP_COLL_MOVE_RENAME: + case Transaction::OP_TRY_RENAME: + { + ceph_assert(op->cid == op->dest_cid); + const ghobject_t& noid = i.get_oid(op->dest_oid); + OnodeRef& no = ovec[op->dest_oid]; + if (!no) { + no = c->get_onode(noid, false); + } + r = _rename(txc, c, o, no, noid); + } + break; + + case Transaction::OP_OMAP_CLEAR: + { + r = _omap_clear(txc, c, o); + } + break; + case Transaction::OP_OMAP_SETKEYS: + { + bufferlist aset_bl; + i.decode_attrset_bl(&aset_bl); + r = _omap_setkeys(txc, c, o, aset_bl); + } + break; + case Transaction::OP_OMAP_RMKEYS: + { + bufferlist keys_bl; + i.decode_keyset_bl(&keys_bl); + r = _omap_rmkeys(txc, c, o, keys_bl); + } + break; + case Transaction::OP_OMAP_RMKEYRANGE: + { + string first, last; + first = i.decode_string(); + last = i.decode_string(); + r = _omap_rmkey_range(txc, c, o, first, last); + } + break; + case Transaction::OP_OMAP_SETHEADER: + { + bufferlist bl; + i.decode_bl(bl); + r = _omap_setheader(txc, c, o, bl); + } + break; + + case Transaction::OP_SETALLOCHINT: + { + r = _set_alloc_hint(txc, c, o, + op->expected_object_size, + op->expected_write_size, + op->hint); + } + break; + + default: + derr << __func__ << " bad op " << op->op << dendl; + ceph_abort(); + } + + endop: + if (r < 0) { + bool ok = false; + + if (r == -ENOENT && !(op->op == Transaction::OP_CLONERANGE || + op->op == Transaction::OP_CLONE || + op->op == Transaction::OP_CLONERANGE2 || + op->op == Transaction::OP_COLL_ADD || + op->op == Transaction::OP_SETATTR || + op->op == Transaction::OP_SETATTRS || + op->op == Transaction::OP_RMATTR || + op->op == Transaction::OP_OMAP_SETKEYS || + op->op == Transaction::OP_OMAP_RMKEYS || + op->op == Transaction::OP_OMAP_RMKEYRANGE || + op->op == Transaction::OP_OMAP_SETHEADER)) + // -ENOENT is usually okay + ok = true; + if (r == -ENODATA) + ok = true; + + if (!ok) { + const char *msg = "unexpected error code"; + + if (r == -ENOENT && (op->op == Transaction::OP_CLONERANGE || + op->op == Transaction::OP_CLONE || + op->op == Transaction::OP_CLONERANGE2)) + msg = "ENOENT on clone suggests osd bug"; + + if (r == -ENOSPC) + // For now, if we hit _any_ ENOSPC, crash, before we do any damage + // by partially applying transactions. + msg = "ENOSPC from bluestore, misconfigured cluster"; + + if (r == -ENOTEMPTY) { + msg = "ENOTEMPTY suggests garbage data in osd data dir"; + } + + derr << __func__ << " error " << cpp_strerror(r) + << " not handled on operation " << op->op + << " (op " << pos << ", counting from 0)" + << dendl; + derr << msg << dendl; + _dump_transaction<0>(cct, t); + ceph_abort_msg("unexpected error"); + } + } + } +} + + + +// ----------------- +// write operations + +int BlueStore::_touch(TransContext *txc, + CollectionRef& c, + OnodeRef &o) +{ + dout(15) << __func__ << " " << c->cid << " " << o->oid << dendl; + int r = 0; + _assign_nid(txc, o); + txc->write_onode(o); + dout(10) << __func__ << " " << c->cid << " " << o->oid << " = " << r << dendl; + return r; +} + +void BlueStore::_pad_zeros( + bufferlist *bl, uint64_t *offset, + uint64_t chunk_size) +{ + auto length = bl->length(); + dout(30) << __func__ << " 0x" << std::hex << *offset << "~" << length + << " chunk_size 0x" << chunk_size << std::dec << dendl; + dout(40) << "before:\n"; + bl->hexdump(*_dout); + *_dout << dendl; + // front + size_t front_pad = *offset % chunk_size; + size_t back_pad = 0; + size_t pad_count = 0; + if (front_pad) { + size_t front_copy = std::min<uint64_t>(chunk_size - front_pad, length); + bufferptr z = ceph::buffer::create_small_page_aligned(chunk_size); + z.zero(0, front_pad, false); + pad_count += front_pad; + bl->begin().copy(front_copy, z.c_str() + front_pad); + if (front_copy + front_pad < chunk_size) { + back_pad = chunk_size - (length + front_pad); + z.zero(front_pad + length, back_pad, false); + pad_count += back_pad; + } + bufferlist old, t; + old.swap(*bl); + t.substr_of(old, front_copy, length - front_copy); + bl->append(z); + bl->claim_append(t); + *offset -= front_pad; + length += pad_count; + } + + // back + uint64_t end = *offset + length; + unsigned back_copy = end % chunk_size; + if (back_copy) { + ceph_assert(back_pad == 0); + back_pad = chunk_size - back_copy; + ceph_assert(back_copy <= length); + bufferptr tail(chunk_size); + bl->begin(length - back_copy).copy(back_copy, tail.c_str()); + tail.zero(back_copy, back_pad, false); + bufferlist old; + old.swap(*bl); + bl->substr_of(old, 0, length - back_copy); + bl->append(tail); + length += back_pad; + pad_count += back_pad; + } + dout(20) << __func__ << " pad 0x" << std::hex << front_pad << " + 0x" + << back_pad << " on front/back, now 0x" << *offset << "~" + << length << std::dec << dendl; + dout(40) << "after:\n"; + bl->hexdump(*_dout); + *_dout << dendl; + if (pad_count) + logger->inc(l_bluestore_write_pad_bytes, pad_count); + ceph_assert(bl->length() == length); +} + +void BlueStore::_do_write_small( + TransContext *txc, + CollectionRef &c, + OnodeRef o, + uint64_t offset, uint64_t length, + bufferlist::iterator& blp, + WriteContext *wctx) +{ + dout(10) << __func__ << " 0x" << std::hex << offset << "~" << length + << std::dec << dendl; + ceph_assert(length < min_alloc_size); + + uint64_t end_offs = offset + length; + + logger->inc(l_bluestore_write_small); + logger->inc(l_bluestore_write_small_bytes, length); + + bufferlist bl; + blp.copy(length, bl); + + auto max_bsize = std::max(wctx->target_blob_size, min_alloc_size); + auto min_off = offset >= max_bsize ? offset - max_bsize : 0; + uint32_t alloc_len = min_alloc_size; + auto offset0 = p2align<uint64_t>(offset, alloc_len); + + bool any_change; + + // search suitable extent in both forward and reverse direction in + // [offset - target_max_blob_size, offset + target_max_blob_size] range + // then check if blob can be reused via can_reuse_blob func or apply + // direct/deferred write (the latter for extents including or higher + // than 'offset' only). + o->extent_map.fault_range(db, min_off, offset + max_bsize - min_off); + + // On zoned devices, the first goal is to support non-overwrite workloads, + // such as RGW, with large, aligned objects. Therefore, for user writes + // _do_write_small should not trigger. OSDs, however, write and update a tiny + // amount of metadata, such as OSD maps, to disk. For those cases, we + // temporarily just pad them to min_alloc_size and write them to a new place + // on every update. + if (bdev->is_smr()) { + BlobRef b = c->new_blob(); + uint64_t b_off = p2phase<uint64_t>(offset, alloc_len); + uint64_t b_off0 = b_off; + _pad_zeros(&bl, &b_off0, min_alloc_size); + o->extent_map.punch_hole(c, offset, length, &wctx->old_extents); + wctx->write(offset, b, alloc_len, b_off0, bl, b_off, length, false, true); + return; + } + + // Look for an existing mutable blob we can use. + auto begin = o->extent_map.extent_map.begin(); + auto end = o->extent_map.extent_map.end(); + auto ep = o->extent_map.seek_lextent(offset); + if (ep != begin) { + --ep; + if (ep->blob_end() <= offset) { + ++ep; + } + } + auto prev_ep = end; + if (ep != begin) { + prev_ep = ep; + --prev_ep; + } + + boost::container::flat_set<const bluestore_blob_t*> inspected_blobs; + // We don't want to have more blobs than min alloc units fit + // into 2 max blobs + size_t blob_threshold = max_blob_size / min_alloc_size * 2 + 1; + bool above_blob_threshold = false; + + inspected_blobs.reserve(blob_threshold); + + uint64_t max_off = 0; + auto start_ep = ep; + auto end_ep = ep; // exclusively + do { + any_change = false; + + if (ep != end && ep->logical_offset < offset + max_bsize) { + BlobRef b = ep->blob; + if (!above_blob_threshold) { + inspected_blobs.insert(&b->get_blob()); + above_blob_threshold = inspected_blobs.size() >= blob_threshold; + } + max_off = ep->logical_end(); + auto bstart = ep->blob_start(); + + dout(20) << __func__ << " considering " << *b + << " bstart 0x" << std::hex << bstart << std::dec << dendl; + if (bstart >= end_offs) { + dout(20) << __func__ << " ignoring distant " << *b << dendl; + } else if (!b->get_blob().is_mutable()) { + dout(20) << __func__ << " ignoring immutable " << *b << dendl; + } else if (ep->logical_offset % min_alloc_size != + ep->blob_offset % min_alloc_size) { + dout(20) << __func__ << " ignoring offset-skewed " << *b << dendl; + } else { + uint64_t chunk_size = b->get_blob().get_chunk_size(block_size); + // can we pad our head/tail out with zeros? + uint64_t head_pad, tail_pad; + head_pad = p2phase(offset, chunk_size); + tail_pad = p2nphase(end_offs, chunk_size); + if (head_pad || tail_pad) { + o->extent_map.fault_range(db, offset - head_pad, + end_offs - offset + head_pad + tail_pad); + } + if (head_pad && + o->extent_map.has_any_lextents(offset - head_pad, head_pad)) { + head_pad = 0; + } + if (tail_pad && o->extent_map.has_any_lextents(end_offs, tail_pad)) { + tail_pad = 0; + } + + uint64_t b_off = offset - head_pad - bstart; + uint64_t b_len = length + head_pad + tail_pad; + + // direct write into unused blocks of an existing mutable blob? + if ((b_off % chunk_size == 0 && b_len % chunk_size == 0) && + b->get_blob().get_ondisk_length() >= b_off + b_len && + b->get_blob().is_unused(b_off, b_len) && + b->get_blob().is_allocated(b_off, b_len)) { + _apply_padding(head_pad, tail_pad, bl); + + dout(20) << __func__ << " write to unused 0x" << std::hex + << b_off << "~" << b_len + << " pad 0x" << head_pad << " + 0x" << tail_pad + << std::dec << " of mutable " << *b << dendl; + _buffer_cache_write(txc, b, b_off, bl, + wctx->buffered ? 0 : Buffer::FLAG_NOCACHE); + + if (!g_conf()->bluestore_debug_omit_block_device_write) { + if (b_len < prefer_deferred_size) { + dout(20) << __func__ << " deferring small 0x" << std::hex + << b_len << std::dec << " unused write via deferred" << dendl; + bluestore_deferred_op_t *op = _get_deferred_op(txc, bl.length()); + op->op = bluestore_deferred_op_t::OP_WRITE; + b->get_blob().map( + b_off, b_len, + [&](uint64_t offset, uint64_t length) { + op->extents.emplace_back(bluestore_pextent_t(offset, length)); + return 0; + }); + op->data = bl; + } else { + b->get_blob().map_bl( + b_off, bl, + [&](uint64_t offset, bufferlist& t) { + bdev->aio_write(offset, t, + &txc->ioc, wctx->buffered); + }); + } + } + b->dirty_blob().calc_csum(b_off, bl); + dout(20) << __func__ << " lex old " << *ep << dendl; + Extent *le = o->extent_map.set_lextent(c, offset, b_off + head_pad, length, + b, + &wctx->old_extents); + b->dirty_blob().mark_used(le->blob_offset, le->length); + + txc->statfs_delta.stored() += le->length; + dout(20) << __func__ << " lex " << *le << dendl; + logger->inc(l_bluestore_write_small_unused); + return; + } + // read some data to fill out the chunk? + uint64_t head_read = p2phase(b_off, chunk_size); + uint64_t tail_read = p2nphase(b_off + b_len, chunk_size); + if ((head_read || tail_read) && + (b->get_blob().get_ondisk_length() >= b_off + b_len + tail_read) && + head_read + tail_read < min_alloc_size) { + b_off -= head_read; + b_len += head_read + tail_read; + + } else { + head_read = tail_read = 0; + } + + // chunk-aligned deferred overwrite? + if (b->get_blob().get_ondisk_length() >= b_off + b_len && + b_off % chunk_size == 0 && + b_len % chunk_size == 0 && + b->get_blob().is_allocated(b_off, b_len)) { + + _apply_padding(head_pad, tail_pad, bl); + + dout(20) << __func__ << " reading head 0x" << std::hex << head_read + << " and tail 0x" << tail_read << std::dec << dendl; + if (head_read) { + bufferlist head_bl; + int r = _do_read(c.get(), o, offset - head_pad - head_read, head_read, + head_bl, 0); + ceph_assert(r >= 0 && r <= (int)head_read); + size_t zlen = head_read - r; + if (zlen) { + head_bl.append_zero(zlen); + logger->inc(l_bluestore_write_pad_bytes, zlen); + } + head_bl.claim_append(bl); + bl.swap(head_bl); + logger->inc(l_bluestore_write_penalty_read_ops); + } + if (tail_read) { + bufferlist tail_bl; + int r = _do_read(c.get(), o, offset + length + tail_pad, tail_read, + tail_bl, 0); + ceph_assert(r >= 0 && r <= (int)tail_read); + size_t zlen = tail_read - r; + if (zlen) { + tail_bl.append_zero(zlen); + logger->inc(l_bluestore_write_pad_bytes, zlen); + } + bl.claim_append(tail_bl); + logger->inc(l_bluestore_write_penalty_read_ops); + } + logger->inc(l_bluestore_write_small_pre_read); + + _buffer_cache_write(txc, b, b_off, bl, + wctx->buffered ? 0 : Buffer::FLAG_NOCACHE); + + b->dirty_blob().calc_csum(b_off, bl); + + if (!g_conf()->bluestore_debug_omit_block_device_write) { + bluestore_deferred_op_t *op = _get_deferred_op(txc, bl.length()); + op->op = bluestore_deferred_op_t::OP_WRITE; + int r = b->get_blob().map( + b_off, b_len, + [&](uint64_t offset, uint64_t length) { + op->extents.emplace_back(bluestore_pextent_t(offset, length)); + return 0; + }); + ceph_assert(r == 0); + op->data = std::move(bl); + dout(20) << __func__ << " deferred write 0x" << std::hex << b_off << "~" + << b_len << std::dec << " of mutable " << *b + << " at " << op->extents << dendl; + } + + Extent *le = o->extent_map.set_lextent(c, offset, offset - bstart, length, + b, &wctx->old_extents); + b->dirty_blob().mark_used(le->blob_offset, le->length); + txc->statfs_delta.stored() += le->length; + dout(20) << __func__ << " lex " << *le << dendl; + return; + } + // try to reuse blob if we can + if (b->can_reuse_blob(min_alloc_size, + max_bsize, + offset0 - bstart, + &alloc_len)) { + ceph_assert(alloc_len == min_alloc_size); // expecting data always + // fit into reused blob + // Need to check for pending writes desiring to + // reuse the same pextent. The rationale is that during GC two chunks + // from garbage blobs(compressed?) can share logical space within the same + // AU. That's in turn might be caused by unaligned len in clone_range2. + // Hence the second write will fail in an attempt to reuse blob at + // do_alloc_write(). + if (!wctx->has_conflict(b, + offset0, + offset0 + alloc_len, + min_alloc_size)) { + + // we can't reuse pad_head/pad_tail since they might be truncated + // due to existent extents + uint64_t b_off = offset - bstart; + uint64_t b_off0 = b_off; + _pad_zeros(&bl, &b_off0, chunk_size); + + dout(20) << __func__ << " reuse blob " << *b << std::hex + << " (0x" << b_off0 << "~" << bl.length() << ")" + << " (0x" << b_off << "~" << length << ")" + << std::dec << dendl; + + o->extent_map.punch_hole(c, offset, length, &wctx->old_extents); + wctx->write(offset, b, alloc_len, b_off0, bl, b_off, length, + false, false); + logger->inc(l_bluestore_write_small_unused); + return; + } + } + } + ++ep; + end_ep = ep; + any_change = true; + } // if (ep != end && ep->logical_offset < offset + max_bsize) + + // check extent for reuse in reverse order + if (prev_ep != end && prev_ep->logical_offset >= min_off) { + BlobRef b = prev_ep->blob; + if (!above_blob_threshold) { + inspected_blobs.insert(&b->get_blob()); + above_blob_threshold = inspected_blobs.size() >= blob_threshold; + } + start_ep = prev_ep; + auto bstart = prev_ep->blob_start(); + dout(20) << __func__ << " considering " << *b + << " bstart 0x" << std::hex << bstart << std::dec << dendl; + if (b->can_reuse_blob(min_alloc_size, + max_bsize, + offset0 - bstart, + &alloc_len)) { + ceph_assert(alloc_len == min_alloc_size); // expecting data always + // fit into reused blob + // Need to check for pending writes desiring to + // reuse the same pextent. The rationale is that during GC two chunks + // from garbage blobs(compressed?) can share logical space within the same + // AU. That's in turn might be caused by unaligned len in clone_range2. + // Hence the second write will fail in an attempt to reuse blob at + // do_alloc_write(). + if (!wctx->has_conflict(b, + offset0, + offset0 + alloc_len, + min_alloc_size)) { + + uint64_t chunk_size = b->get_blob().get_chunk_size(block_size); + uint64_t b_off = offset - bstart; + uint64_t b_off0 = b_off; + _pad_zeros(&bl, &b_off0, chunk_size); + + dout(20) << __func__ << " reuse blob " << *b << std::hex + << " (0x" << b_off0 << "~" << bl.length() << ")" + << " (0x" << b_off << "~" << length << ")" + << std::dec << dendl; + + o->extent_map.punch_hole(c, offset, length, &wctx->old_extents); + wctx->write(offset, b, alloc_len, b_off0, bl, b_off, length, + false, false); + logger->inc(l_bluestore_write_small_unused); + return; + } + } + if (prev_ep != begin) { + --prev_ep; + any_change = true; + } else { + prev_ep = end; // to avoid useless first extent re-check + } + } // if (prev_ep != end && prev_ep->logical_offset >= min_off) + } while (any_change); + + if (above_blob_threshold) { + dout(10) << __func__ << " request GC, blobs >= " << inspected_blobs.size() + << " " << std::hex << min_off << "~" << max_off << std::dec + << dendl; + ceph_assert(start_ep != end_ep); + for (auto ep = start_ep; ep != end_ep; ++ep) { + dout(20) << __func__ << " inserting for GC " + << std::hex << ep->logical_offset << "~" << ep->length + << std::dec << dendl; + + wctx->extents_to_gc.union_insert(ep->logical_offset, ep->length); + } + // insert newly written extent to GC + wctx->extents_to_gc.union_insert(offset, length); + dout(20) << __func__ << " inserting (last) for GC " + << std::hex << offset << "~" << length + << std::dec << dendl; + } + // new blob. + BlobRef b = c->new_blob(); + uint64_t b_off = p2phase<uint64_t>(offset, alloc_len); + uint64_t b_off0 = b_off; + _pad_zeros(&bl, &b_off0, block_size); + o->extent_map.punch_hole(c, offset, length, &wctx->old_extents); + wctx->write(offset, b, alloc_len, b_off0, bl, b_off, length, + min_alloc_size != block_size, // use 'unused' bitmap when alloc granularity + // doesn't match disk one only + true); + + return; +} + +bool BlueStore::BigDeferredWriteContext::can_defer( + BlueStore::extent_map_t::iterator ep, + uint64_t prefer_deferred_size, + uint64_t block_size, + uint64_t offset, + uint64_t l) +{ + bool res = false; + auto& blob = ep->blob->get_blob(); + if (offset >= ep->blob_start() && + blob.is_mutable()) { + off = offset; + b_off = offset - ep->blob_start(); + uint64_t chunk_size = blob.get_chunk_size(block_size); + uint64_t ondisk = blob.get_ondisk_length(); + used = std::min(l, ondisk - b_off); + + // will read some data to fill out the chunk? + head_read = p2phase<uint64_t>(b_off, chunk_size); + tail_read = p2nphase<uint64_t>(b_off + used, chunk_size); + b_off -= head_read; + + ceph_assert(b_off % chunk_size == 0); + ceph_assert(blob_aligned_len() % chunk_size == 0); + + res = blob_aligned_len() < prefer_deferred_size && + blob_aligned_len() <= ondisk && + blob.is_allocated(b_off, blob_aligned_len()); + if (res) { + blob_ref = ep->blob; + blob_start = ep->blob_start(); + } + } + return res; +} + +bool BlueStore::BigDeferredWriteContext::apply_defer() +{ + int r = blob_ref->get_blob().map( + b_off, blob_aligned_len(), + [&](const bluestore_pextent_t& pext, + uint64_t offset, + uint64_t length) { + // apply deferred if overwrite breaks blob continuity only. + // if it totally overlaps some pextent - fallback to regular write + if (pext.offset < offset || + pext.end() > offset + length) { + res_extents.emplace_back(bluestore_pextent_t(offset, length)); + return 0; + } + return -1; + }); + return r >= 0; +} + +void BlueStore::_do_write_big_apply_deferred( + TransContext* txc, + CollectionRef& c, + OnodeRef o, + BlueStore::BigDeferredWriteContext& dctx, + bufferlist::iterator& blp, + WriteContext* wctx) +{ + bufferlist bl; + dout(20) << __func__ << " reading head 0x" << std::hex << dctx.head_read + << " and tail 0x" << dctx.tail_read << std::dec << dendl; + if (dctx.head_read) { + int r = _do_read(c.get(), o, + dctx.off - dctx.head_read, + dctx.head_read, + bl, + 0); + ceph_assert(r >= 0 && r <= (int)dctx.head_read); + size_t zlen = dctx.head_read - r; + if (zlen) { + bl.append_zero(zlen); + logger->inc(l_bluestore_write_pad_bytes, zlen); + } + logger->inc(l_bluestore_write_penalty_read_ops); + } + blp.copy(dctx.used, bl); + + if (dctx.tail_read) { + bufferlist tail_bl; + int r = _do_read(c.get(), o, + dctx.off + dctx.used, dctx.tail_read, + tail_bl, 0); + ceph_assert(r >= 0 && r <= (int)dctx.tail_read); + size_t zlen = dctx.tail_read - r; + if (zlen) { + tail_bl.append_zero(zlen); + logger->inc(l_bluestore_write_pad_bytes, zlen); + } + bl.claim_append(tail_bl); + logger->inc(l_bluestore_write_penalty_read_ops); + } + auto& b0 = dctx.blob_ref; + _buffer_cache_write(txc, b0, dctx.b_off, bl, + wctx->buffered ? 0 : Buffer::FLAG_NOCACHE); + + b0->dirty_blob().calc_csum(dctx.b_off, bl); + + Extent* le = o->extent_map.set_lextent(c, dctx.off, + dctx.off - dctx.blob_start, dctx.used, b0, &wctx->old_extents); + + // in fact this is a no-op for big writes but left here to maintain + // uniformity and avoid missing after some refactor. + b0->dirty_blob().mark_used(le->blob_offset, le->length); + txc->statfs_delta.stored() += le->length; + + if (!g_conf()->bluestore_debug_omit_block_device_write) { + bluestore_deferred_op_t* op = _get_deferred_op(txc, bl.length()); + op->op = bluestore_deferred_op_t::OP_WRITE; + op->extents.swap(dctx.res_extents); + op->data = std::move(bl); + } +} + +void BlueStore::_do_write_big( + TransContext *txc, + CollectionRef &c, + OnodeRef o, + uint64_t offset, uint64_t length, + bufferlist::iterator& blp, + WriteContext *wctx) +{ + dout(10) << __func__ << " 0x" << std::hex << offset << "~" << length + << " target_blob_size 0x" << wctx->target_blob_size << std::dec + << " compress " << (int)wctx->compress + << dendl; + logger->inc(l_bluestore_write_big); + logger->inc(l_bluestore_write_big_bytes, length); + auto max_bsize = std::max(wctx->target_blob_size, min_alloc_size); + uint64_t prefer_deferred_size_snapshot = prefer_deferred_size.load(); + while (length > 0) { + bool new_blob = false; + BlobRef b; + uint32_t b_off = 0; + uint32_t l = 0; + + //attempting to reuse existing blob + if (!wctx->compress) { + // enforce target blob alignment with max_bsize + l = max_bsize - p2phase(offset, max_bsize); + l = std::min(uint64_t(l), length); + + auto end = o->extent_map.extent_map.end(); + + dout(20) << __func__ << " may be defer: 0x" << std::hex + << offset << "~" << l + << std::dec << dendl; + + if (prefer_deferred_size_snapshot && + l <= prefer_deferred_size_snapshot * 2) { + // Single write that spans two adjusted existing blobs can result + // in up to two deferred blocks of 'prefer_deferred_size' + // So we're trying to minimize the amount of resulting blobs + // and preserve 2 blobs rather than inserting one more in between + // E.g. write 0x10000~20000 over existing blobs + // (0x0~20000 and 0x20000~20000) is better (from subsequent reading + // performance point of view) to result in two deferred writes to + // existing blobs than having 3 blobs: 0x0~10000, 0x10000~20000, 0x30000~10000 + + // look for an existing mutable blob we can write into + auto ep = o->extent_map.seek_lextent(offset); + auto ep_next = end; + BigDeferredWriteContext head_info, tail_info; + + bool will_defer = ep != end ? + head_info.can_defer(ep, + prefer_deferred_size_snapshot, + block_size, + offset, + l) : + false; + auto offset_next = offset + head_info.used; + auto remaining = l - head_info.used; + if (will_defer && remaining) { + will_defer = false; + if (remaining <= prefer_deferred_size_snapshot) { + ep_next = o->extent_map.seek_lextent(offset_next); + // check if we can defer remaining totally + will_defer = ep_next == end ? + false : + tail_info.can_defer(ep_next, + prefer_deferred_size_snapshot, + block_size, + offset_next, + remaining); + will_defer = will_defer && remaining == tail_info.used; + } + } + if (will_defer) { + dout(20) << __func__ << " " << *(head_info.blob_ref) + << " deferring big " << std::hex + << " (0x" << head_info.b_off << "~" << head_info.blob_aligned_len() << ")" + << std::dec << " write via deferred" + << dendl; + if (remaining) { + dout(20) << __func__ << " " << *(tail_info.blob_ref) + << " deferring big " << std::hex + << " (0x" << tail_info.b_off << "~" << tail_info.blob_aligned_len() << ")" + << std::dec << " write via deferred" + << dendl; + } + + will_defer = head_info.apply_defer(); + if (!will_defer) { + dout(20) << __func__ + << " deferring big fell back, head isn't continuous" + << dendl; + } else if (remaining) { + will_defer = tail_info.apply_defer(); + if (!will_defer) { + dout(20) << __func__ + << " deferring big fell back, tail isn't continuous" + << dendl; + } + } + } + if (will_defer) { + _do_write_big_apply_deferred(txc, c, o, head_info, blp, wctx); + if (remaining) { + _do_write_big_apply_deferred(txc, c, o, tail_info, + blp, wctx); + } + dout(20) << __func__ << " defer big: 0x" << std::hex + << offset << "~" << l + << std::dec << dendl; + offset += l; + length -= l; + logger->inc(l_bluestore_write_big_blobs, remaining ? 2 : 1); + logger->inc(l_bluestore_write_big_deferred, remaining ? 2 : 1); + continue; + } + } + dout(20) << __func__ << " lookup for blocks to reuse..." << dendl; + + o->extent_map.punch_hole(c, offset, l, &wctx->old_extents); + + // seek again as punch_hole could invalidate ep + auto ep = o->extent_map.seek_lextent(offset); + auto begin = o->extent_map.extent_map.begin(); + auto prev_ep = end; + if (ep != begin) { + prev_ep = ep; + --prev_ep; + } + + auto min_off = offset >= max_bsize ? offset - max_bsize : 0; + // search suitable extent in both forward and reverse direction in + // [offset - target_max_blob_size, offset + target_max_blob_size] range + // then check if blob can be reused via can_reuse_blob func. + bool any_change; + do { + any_change = false; + if (ep != end && ep->logical_offset < offset + max_bsize) { + dout(20) << __func__ << " considering " << *ep + << " bstart 0x" << std::hex << ep->blob_start() << std::dec << dendl; + + if (offset >= ep->blob_start() && + ep->blob->can_reuse_blob(min_alloc_size, max_bsize, + offset - ep->blob_start(), + &l)) { + b = ep->blob; + b_off = offset - ep->blob_start(); + prev_ep = end; // to avoid check below + dout(20) << __func__ << " reuse blob " << *b << std::hex + << " (0x" << b_off << "~" << l << ")" << std::dec << dendl; + } else { + ++ep; + any_change = true; + } + } + + if (prev_ep != end && prev_ep->logical_offset >= min_off) { + dout(20) << __func__ << " considering rev " << *prev_ep + << " bstart 0x" << std::hex << prev_ep->blob_start() << std::dec << dendl; + if (prev_ep->blob->can_reuse_blob(min_alloc_size, max_bsize, + offset - prev_ep->blob_start(), + &l)) { + b = prev_ep->blob; + b_off = offset - prev_ep->blob_start(); + dout(20) << __func__ << " reuse blob " << *b << std::hex + << " (0x" << b_off << "~" << l << ")" << std::dec << dendl; + } else if (prev_ep != begin) { + --prev_ep; + any_change = true; + } else { + prev_ep = end; // to avoid useless first extent re-check + } + } + } while (b == nullptr && any_change); + } else { + // trying to utilize as longer chunk as permitted in case of compression. + l = std::min(max_bsize, length); + o->extent_map.punch_hole(c, offset, l, &wctx->old_extents); + } // if (!wctx->compress) + + if (b == nullptr) { + b = c->new_blob(); + b_off = 0; + new_blob = true; + } + bufferlist t; + blp.copy(l, t); + wctx->write(offset, b, l, b_off, t, b_off, l, false, new_blob); + dout(20) << __func__ << " schedule write big: 0x" + << std::hex << offset << "~" << l << std::dec + << (new_blob ? " new " : " reuse ") + << *b << dendl; + offset += l; + length -= l; + logger->inc(l_bluestore_write_big_blobs); + } +} + +int BlueStore::_do_alloc_write( + TransContext *txc, + CollectionRef coll, + OnodeRef o, + WriteContext *wctx) +{ + dout(20) << __func__ << " txc " << txc + << " " << wctx->writes.size() << " blobs" + << dendl; + if (wctx->writes.empty()) { + return 0; + } + + CompressorRef c; + double crr = 0; + if (wctx->compress) { + c = select_option( + "compression_algorithm", + compressor, + [&]() { + string val; + if (coll->pool_opts.get(pool_opts_t::COMPRESSION_ALGORITHM, &val)) { + CompressorRef cp = compressor; + if (!cp || cp->get_type_name() != val) { + cp = Compressor::create(cct, val); + if (!cp) { + if (_set_compression_alert(false, val.c_str())) { + derr << __func__ << " unable to initialize " << val.c_str() + << " compressor" << dendl; + } + } + } + return boost::optional<CompressorRef>(cp); + } + return boost::optional<CompressorRef>(); + } + ); + + crr = select_option( + "compression_required_ratio", + cct->_conf->bluestore_compression_required_ratio, + [&]() { + double val; + if (coll->pool_opts.get(pool_opts_t::COMPRESSION_REQUIRED_RATIO, &val)) { + return boost::optional<double>(val); + } + return boost::optional<double>(); + } + ); + } + + // checksum + int64_t csum = csum_type.load(); + csum = select_option( + "csum_type", + csum, + [&]() { + int64_t val; + if (coll->pool_opts.get(pool_opts_t::CSUM_TYPE, &val)) { + return boost::optional<int64_t>(val); + } + return boost::optional<int64_t>(); + } + ); + + // compress (as needed) and calc needed space + uint64_t need = 0; + uint64_t data_size = 0; + // 'need' is amount of space that must be provided by allocator. + // 'data_size' is a size of data that will be transferred to disk. + // Note that data_size is always <= need. This comes from: + // - write to blob was unaligned, and there is free space + // - data has been compressed + // + // We make one decision and apply it to all blobs. + // All blobs will be deferred or none will. + // We assume that allocator does its best to provide contiguous space, + // and the condition is : (data_size < deferred). + + auto max_bsize = std::max(wctx->target_blob_size, min_alloc_size); + for (auto& wi : wctx->writes) { + if (c && wi.blob_length > min_alloc_size) { + auto start = mono_clock::now(); + + // compress + ceph_assert(wi.b_off == 0); + ceph_assert(wi.blob_length == wi.bl.length()); + + // FIXME: memory alignment here is bad + bufferlist t; + boost::optional<int32_t> compressor_message; + int r = c->compress(wi.bl, t, compressor_message); + uint64_t want_len_raw = wi.blob_length * crr; + uint64_t want_len = p2roundup(want_len_raw, min_alloc_size); + bool rejected = false; + uint64_t compressed_len = t.length(); + // do an approximate (fast) estimation for resulting blob size + // that doesn't take header overhead into account + uint64_t result_len = p2roundup(compressed_len, min_alloc_size); + if (r == 0 && result_len <= want_len && result_len < wi.blob_length) { + bluestore_compression_header_t chdr; + chdr.type = c->get_type(); + chdr.length = t.length(); + chdr.compressor_message = compressor_message; + encode(chdr, wi.compressed_bl); + wi.compressed_bl.claim_append(t); + + compressed_len = wi.compressed_bl.length(); + result_len = p2roundup(compressed_len, min_alloc_size); + if (result_len <= want_len && result_len < wi.blob_length) { + // Cool. We compressed at least as much as we were hoping to. + // pad out to min_alloc_size + wi.compressed_bl.append_zero(result_len - compressed_len); + wi.compressed_len = compressed_len; + wi.compressed = true; + logger->inc(l_bluestore_write_pad_bytes, result_len - compressed_len); + dout(20) << __func__ << std::hex << " compressed 0x" << wi.blob_length + << " -> 0x" << compressed_len << " => 0x" << result_len + << " with " << c->get_type() + << std::dec << dendl; + txc->statfs_delta.compressed() += compressed_len; + txc->statfs_delta.compressed_original() += wi.blob_length; + txc->statfs_delta.compressed_allocated() += result_len; + logger->inc(l_bluestore_compress_success_count); + need += result_len; + data_size += result_len; + } else { + rejected = true; + } + } else if (r != 0) { + dout(5) << __func__ << std::hex << " 0x" << wi.blob_length + << " bytes compressed using " << c->get_type_name() + << std::dec + << " failed with errcode = " << r + << ", leaving uncompressed" + << dendl; + logger->inc(l_bluestore_compress_rejected_count); + need += wi.blob_length; + data_size += wi.bl.length(); + } else { + rejected = true; + } + + if (rejected) { + dout(20) << __func__ << std::hex << " 0x" << wi.blob_length + << " compressed to 0x" << compressed_len << " -> 0x" << result_len + << " with " << c->get_type() + << ", which is more than required 0x" << want_len_raw + << " -> 0x" << want_len + << ", leaving uncompressed" + << std::dec << dendl; + logger->inc(l_bluestore_compress_rejected_count); + need += wi.blob_length; + data_size += wi.bl.length(); + } + log_latency("compress@_do_alloc_write", + l_bluestore_compress_lat, + mono_clock::now() - start, + cct->_conf->bluestore_log_op_age ); + } else { + need += wi.blob_length; + data_size += wi.bl.length(); + } + } + PExtentVector prealloc; + prealloc.reserve(2 * wctx->writes.size()); + int64_t prealloc_left = 0; + prealloc_left = shared_alloc.a->allocate( + need, min_alloc_size, need, + 0, &prealloc); + if (prealloc_left < 0 || prealloc_left < (int64_t)need) { + derr << __func__ << " failed to allocate 0x" << std::hex << need + << " allocated 0x " << (prealloc_left < 0 ? 0 : prealloc_left) + << " min_alloc_size 0x" << min_alloc_size + << " available 0x " << shared_alloc.a->get_free() + << std::dec << dendl; + if (prealloc.size()) { + shared_alloc.a->release(prealloc); + } + return -ENOSPC; + } + _collect_allocation_stats(need, min_alloc_size, prealloc.size()); + + if (bdev->is_smr()) { + std::deque<uint64_t> zones_to_clean; + if (shared_alloc.a->zoned_get_zones_to_clean(&zones_to_clean)) { + std::lock_guard l{zoned_cleaner_lock}; + zoned_cleaner_queue.swap(zones_to_clean); + zoned_cleaner_cond.notify_one(); + } + } + + dout(20) << __func__ << std::hex << " need=0x" << need << " data=0x" << data_size + << " prealloc " << prealloc << dendl; + auto prealloc_pos = prealloc.begin(); + ceph_assert(prealloc_pos != prealloc.end()); + + for (auto& wi : wctx->writes) { + bluestore_blob_t& dblob = wi.b->dirty_blob(); + uint64_t b_off = wi.b_off; + bufferlist *l = &wi.bl; + uint64_t final_length = wi.blob_length; + uint64_t csum_length = wi.blob_length; + if (wi.compressed) { + final_length = wi.compressed_bl.length(); + csum_length = final_length; + unsigned csum_order = ctz(csum_length); + l = &wi.compressed_bl; + dblob.set_compressed(wi.blob_length, wi.compressed_len); + if (csum != Checksummer::CSUM_NONE) { + dout(20) << __func__ + << " initialize csum setting for compressed blob " << *wi.b + << " csum_type " << Checksummer::get_csum_type_string(csum) + << " csum_order " << csum_order + << " csum_length 0x" << std::hex << csum_length + << " blob_length 0x" << wi.blob_length + << " compressed_length 0x" << wi.compressed_len << std::dec + << dendl; + dblob.init_csum(csum, csum_order, csum_length); + } + } else if (wi.new_blob) { + unsigned csum_order; + // initialize newly created blob only + ceph_assert(dblob.is_mutable()); + if (l->length() != wi.blob_length) { + // hrm, maybe we could do better here, but let's not bother. + dout(20) << __func__ << " forcing csum_order to block_size_order " + << block_size_order << dendl; + csum_order = block_size_order; + } else { + csum_order = std::min(wctx->csum_order, ctz(l->length())); + } + // try to align blob with max_blob_size to improve + // its reuse ratio, e.g. in case of reverse write + uint32_t suggested_boff = + (wi.logical_offset - (wi.b_off0 - wi.b_off)) % max_bsize; + if ((suggested_boff % (1 << csum_order)) == 0 && + suggested_boff + final_length <= max_bsize && + suggested_boff > b_off) { + dout(20) << __func__ << " forcing blob_offset to 0x" + << std::hex << suggested_boff << std::dec << dendl; + ceph_assert(suggested_boff >= b_off); + csum_length += suggested_boff - b_off; + b_off = suggested_boff; + } + if (csum != Checksummer::CSUM_NONE) { + dout(20) << __func__ + << " initialize csum setting for new blob " << *wi.b + << " csum_type " << Checksummer::get_csum_type_string(csum) + << " csum_order " << csum_order + << " csum_length 0x" << std::hex << csum_length << std::dec + << dendl; + dblob.init_csum(csum, csum_order, csum_length); + } + } + + PExtentVector extents; + int64_t left = final_length; + auto prefer_deferred_size_snapshot = prefer_deferred_size.load(); + while (left > 0) { + ceph_assert(prealloc_left > 0); + if (prealloc_pos->length <= left) { + prealloc_left -= prealloc_pos->length; + left -= prealloc_pos->length; + txc->statfs_delta.allocated() += prealloc_pos->length; + extents.push_back(*prealloc_pos); + ++prealloc_pos; + } else { + extents.emplace_back(prealloc_pos->offset, left); + prealloc_pos->offset += left; + prealloc_pos->length -= left; + prealloc_left -= left; + txc->statfs_delta.allocated() += left; + left = 0; + break; + } + } + for (auto& p : extents) { + txc->allocated.insert(p.offset, p.length); + } + dblob.allocated(p2align(b_off, min_alloc_size), final_length, extents); + + dout(20) << __func__ << " blob " << *wi.b << dendl; + if (dblob.has_csum()) { + dblob.calc_csum(b_off, *l); + } + + if (wi.mark_unused) { + ceph_assert(!dblob.is_compressed()); + auto b_end = b_off + wi.bl.length(); + if (b_off) { + dblob.add_unused(0, b_off); + } + uint64_t llen = dblob.get_logical_length(); + if (b_end < llen) { + dblob.add_unused(b_end, llen - b_end); + } + } + + Extent *le = o->extent_map.set_lextent(coll, wi.logical_offset, + b_off + (wi.b_off0 - wi.b_off), + wi.length0, + wi.b, + nullptr); + wi.b->dirty_blob().mark_used(le->blob_offset, le->length); + txc->statfs_delta.stored() += le->length; + dout(20) << __func__ << " lex " << *le << dendl; + _buffer_cache_write(txc, wi.b, b_off, wi.bl, + wctx->buffered ? 0 : Buffer::FLAG_NOCACHE); + + // queue io + if (!g_conf()->bluestore_debug_omit_block_device_write) { + if (data_size < prefer_deferred_size_snapshot) { + dout(20) << __func__ << " deferring 0x" << std::hex + << l->length() << std::dec << " write via deferred" << dendl; + bluestore_deferred_op_t *op = _get_deferred_op(txc, l->length()); + op->op = bluestore_deferred_op_t::OP_WRITE; + int r = wi.b->get_blob().map( + b_off, l->length(), + [&](uint64_t offset, uint64_t length) { + op->extents.emplace_back(bluestore_pextent_t(offset, length)); + return 0; + }); + ceph_assert(r == 0); + op->data = *l; + } else { + wi.b->get_blob().map_bl( + b_off, *l, + [&](uint64_t offset, bufferlist& t) { + bdev->aio_write(offset, t, &txc->ioc, false); + }); + logger->inc(l_bluestore_write_new); + } + } + } + ceph_assert(prealloc_pos == prealloc.end()); + ceph_assert(prealloc_left == 0); + return 0; +} + +void BlueStore::_wctx_finish( + TransContext *txc, + CollectionRef& c, + OnodeRef o, + WriteContext *wctx, + set<SharedBlob*> *maybe_unshared_blobs) +{ + auto oep = wctx->old_extents.begin(); + while (oep != wctx->old_extents.end()) { + auto &lo = *oep; + oep = wctx->old_extents.erase(oep); + dout(20) << __func__ << " lex_old " << lo.e << dendl; + BlobRef b = lo.e.blob; + const bluestore_blob_t& blob = b->get_blob(); + if (blob.is_compressed()) { + if (lo.blob_empty) { + txc->statfs_delta.compressed() -= blob.get_compressed_payload_length(); + } + txc->statfs_delta.compressed_original() -= lo.e.length; + } + auto& r = lo.r; + txc->statfs_delta.stored() -= lo.e.length; + if (!r.empty()) { + dout(20) << __func__ << " blob " << *b << " release " << r << dendl; + if (blob.is_shared()) { + PExtentVector final; + c->load_shared_blob(b->shared_blob); + bool unshare = false; + bool* unshare_ptr = + !maybe_unshared_blobs || b->is_referenced() ? nullptr : &unshare; + for (auto e : r) { + b->shared_blob->put_ref( + e.offset, e.length, &final, + unshare_ptr); + } + if (unshare) { + ceph_assert(maybe_unshared_blobs); + maybe_unshared_blobs->insert(b->shared_blob.get()); + } + dout(20) << __func__ << " shared_blob release " << final + << " from " << *b->shared_blob << dendl; + txc->write_shared_blob(b->shared_blob); + r.clear(); + r.swap(final); + } + } + // we can't invalidate our logical extents as we drop them because + // other lextents (either in our onode or others) may still + // reference them. but we can throw out anything that is no + // longer allocated. Note that this will leave behind edge bits + // that are no longer referenced but not deallocated (until they + // age out of the cache naturally). + b->discard_unallocated(c.get()); + for (auto e : r) { + dout(20) << __func__ << " release " << e << dendl; + txc->released.insert(e.offset, e.length); + txc->statfs_delta.allocated() -= e.length; + if (blob.is_compressed()) { + txc->statfs_delta.compressed_allocated() -= e.length; + } + } + + if (b->is_spanning() && !b->is_referenced() && lo.blob_empty) { + dout(20) << __func__ << " spanning_blob_map removing empty " << *b + << dendl; + o->extent_map.spanning_blob_map.erase(b->id); + } + delete &lo; + } +} + +void BlueStore::_do_write_data( + TransContext *txc, + CollectionRef& c, + OnodeRef o, + uint64_t offset, + uint64_t length, + bufferlist& bl, + WriteContext *wctx) +{ + uint64_t end = offset + length; + bufferlist::iterator p = bl.begin(); + + if (offset / min_alloc_size == (end - 1) / min_alloc_size && + (length != min_alloc_size)) { + // we fall within the same block + _do_write_small(txc, c, o, offset, length, p, wctx); + } else { + uint64_t head_offset, head_length; + uint64_t middle_offset, middle_length; + uint64_t tail_offset, tail_length; + + head_offset = offset; + head_length = p2nphase(offset, min_alloc_size); + + tail_offset = p2align(end, min_alloc_size); + tail_length = p2phase(end, min_alloc_size); + + middle_offset = head_offset + head_length; + middle_length = length - head_length - tail_length; + + if (head_length) { + _do_write_small(txc, c, o, head_offset, head_length, p, wctx); + } + + _do_write_big(txc, c, o, middle_offset, middle_length, p, wctx); + + if (tail_length) { + _do_write_small(txc, c, o, tail_offset, tail_length, p, wctx); + } + } +} + +void BlueStore::_choose_write_options( + CollectionRef& c, + OnodeRef o, + uint32_t fadvise_flags, + WriteContext *wctx) +{ + if (fadvise_flags & CEPH_OSD_OP_FLAG_FADVISE_WILLNEED) { + dout(20) << __func__ << " will do buffered write" << dendl; + wctx->buffered = true; + } else if (cct->_conf->bluestore_default_buffered_write && + (fadvise_flags & (CEPH_OSD_OP_FLAG_FADVISE_DONTNEED | + CEPH_OSD_OP_FLAG_FADVISE_NOCACHE)) == 0) { + dout(20) << __func__ << " defaulting to buffered write" << dendl; + wctx->buffered = true; + } + + // apply basic csum block size + wctx->csum_order = block_size_order; + + // compression parameters + unsigned alloc_hints = o->onode.alloc_hint_flags; + auto cm = select_option( + "compression_mode", + comp_mode.load(), + [&]() { + string val; + if (c->pool_opts.get(pool_opts_t::COMPRESSION_MODE, &val)) { + return boost::optional<Compressor::CompressionMode>( + Compressor::get_comp_mode_type(val)); + } + return boost::optional<Compressor::CompressionMode>(); + } + ); + + wctx->compress = (cm != Compressor::COMP_NONE) && + ((cm == Compressor::COMP_FORCE) || + (cm == Compressor::COMP_AGGRESSIVE && + (alloc_hints & CEPH_OSD_ALLOC_HINT_FLAG_INCOMPRESSIBLE) == 0) || + (cm == Compressor::COMP_PASSIVE && + (alloc_hints & CEPH_OSD_ALLOC_HINT_FLAG_COMPRESSIBLE))); + + if ((alloc_hints & CEPH_OSD_ALLOC_HINT_FLAG_SEQUENTIAL_READ) && + (alloc_hints & CEPH_OSD_ALLOC_HINT_FLAG_RANDOM_READ) == 0 && + (alloc_hints & (CEPH_OSD_ALLOC_HINT_FLAG_IMMUTABLE | + CEPH_OSD_ALLOC_HINT_FLAG_APPEND_ONLY)) && + (alloc_hints & CEPH_OSD_ALLOC_HINT_FLAG_RANDOM_WRITE) == 0) { + + dout(20) << __func__ << " will prefer large blob and csum sizes" << dendl; + + if (o->onode.expected_write_size) { + wctx->csum_order = std::max(min_alloc_size_order, + (uint8_t)ctz(o->onode.expected_write_size)); + } else { + wctx->csum_order = min_alloc_size_order; + } + + if (wctx->compress) { + wctx->target_blob_size = select_option( + "compression_max_blob_size", + comp_max_blob_size.load(), + [&]() { + int64_t val; + if (c->pool_opts.get(pool_opts_t::COMPRESSION_MAX_BLOB_SIZE, &val)) { + return boost::optional<uint64_t>((uint64_t)val); + } + return boost::optional<uint64_t>(); + } + ); + } + } else { + if (wctx->compress) { + wctx->target_blob_size = select_option( + "compression_min_blob_size", + comp_min_blob_size.load(), + [&]() { + int64_t val; + if (c->pool_opts.get(pool_opts_t::COMPRESSION_MIN_BLOB_SIZE, &val)) { + return boost::optional<uint64_t>((uint64_t)val); + } + return boost::optional<uint64_t>(); + } + ); + } + } + + uint64_t max_bsize = max_blob_size.load(); + if (wctx->target_blob_size == 0 || wctx->target_blob_size > max_bsize) { + wctx->target_blob_size = max_bsize; + } + + // set the min blob size floor at 2x the min_alloc_size, or else we + // won't be able to allocate a smaller extent for the compressed + // data. + if (wctx->compress && + wctx->target_blob_size < min_alloc_size * 2) { + wctx->target_blob_size = min_alloc_size * 2; + } + + dout(20) << __func__ << " prefer csum_order " << wctx->csum_order + << " target_blob_size 0x" << std::hex << wctx->target_blob_size + << " compress=" << (int)wctx->compress + << " buffered=" << (int)wctx->buffered + << std::dec << dendl; +} + +int BlueStore::_do_gc( + TransContext *txc, + CollectionRef& c, + OnodeRef o, + const WriteContext& wctx, + uint64_t *dirty_start, + uint64_t *dirty_end) +{ + + bool dirty_range_updated = false; + WriteContext wctx_gc; + wctx_gc.fork(wctx); // make a clone for garbage collection + + auto & extents_to_collect = wctx.extents_to_gc; + for (auto it = extents_to_collect.begin(); + it != extents_to_collect.end(); + ++it) { + bufferlist bl; + auto offset = (*it).first; + auto length = (*it).second; + dout(20) << __func__ << " processing " << std::hex + << offset << "~" << length << std::dec + << dendl; + int r = _do_read(c.get(), o, offset, length, bl, 0); + ceph_assert(r == (int)length); + + _do_write_data(txc, c, o, offset, length, bl, &wctx_gc); + logger->inc(l_bluestore_gc_merged, length); + + if (*dirty_start > offset) { + *dirty_start = offset; + dirty_range_updated = true; + } + + if (*dirty_end < offset + length) { + *dirty_end = offset + length; + dirty_range_updated = true; + } + } + if (dirty_range_updated) { + o->extent_map.fault_range(db, *dirty_start, *dirty_end); + } + + dout(30) << __func__ << " alloc write" << dendl; + int r = _do_alloc_write(txc, c, o, &wctx_gc); + if (r < 0) { + derr << __func__ << " _do_alloc_write failed with " << cpp_strerror(r) + << dendl; + return r; + } + + _wctx_finish(txc, c, o, &wctx_gc); + return 0; +} + +int BlueStore::_do_write( + TransContext *txc, + CollectionRef& c, + OnodeRef o, + uint64_t offset, + uint64_t length, + bufferlist& bl, + uint32_t fadvise_flags) +{ + int r = 0; + + dout(20) << __func__ + << " " << o->oid + << " 0x" << std::hex << offset << "~" << length + << " - have 0x" << o->onode.size + << " (" << std::dec << o->onode.size << ")" + << " bytes" << std::hex + << " fadvise_flags 0x" << fadvise_flags + << " alloc_hint 0x" << o->onode.alloc_hint_flags + << " expected_object_size " << o->onode.expected_object_size + << " expected_write_size " << o->onode.expected_write_size + << std::dec + << dendl; + _dump_onode<30>(cct, *o); + + if (length == 0) { + return 0; + } + + uint64_t end = offset + length; + + GarbageCollector gc(c->store->cct); + int64_t benefit = 0; + auto dirty_start = offset; + auto dirty_end = end; + + WriteContext wctx; + _choose_write_options(c, o, fadvise_flags, &wctx); + o->extent_map.fault_range(db, offset, length); + _do_write_data(txc, c, o, offset, length, bl, &wctx); + r = _do_alloc_write(txc, c, o, &wctx); + if (r < 0) { + derr << __func__ << " _do_alloc_write failed with " << cpp_strerror(r) + << dendl; + goto out; + } + + if (wctx.extents_to_gc.empty() || + wctx.extents_to_gc.range_start() > offset || + wctx.extents_to_gc.range_end() < offset + length) { + benefit = gc.estimate(offset, + length, + o->extent_map, + wctx.old_extents, + min_alloc_size); + } + + if (bdev->is_smr()) { + if (wctx.old_extents.empty()) { + txc->zoned_note_new_object(o); + } else { + int64_t old_ondisk_offset = wctx.old_extents.begin()->r.begin()->offset; + txc->zoned_note_updated_object(o, old_ondisk_offset); + } + } + + // NB: _wctx_finish() will empty old_extents + // so we must do gc estimation before that + _wctx_finish(txc, c, o, &wctx); + if (end > o->onode.size) { + dout(20) << __func__ << " extending size to 0x" << std::hex << end + << std::dec << dendl; + o->onode.size = end; + } + + if (benefit >= g_conf()->bluestore_gc_enable_total_threshold) { + wctx.extents_to_gc.union_of(gc.get_extents_to_collect()); + dout(20) << __func__ + << " perform garbage collection for compressed extents, " + << "expected benefit = " << benefit << " AUs" << dendl; + } + if (!wctx.extents_to_gc.empty()) { + dout(20) << __func__ << " perform garbage collection" << dendl; + + r = _do_gc(txc, c, o, + wctx, + &dirty_start, &dirty_end); + if (r < 0) { + derr << __func__ << " _do_gc failed with " << cpp_strerror(r) + << dendl; + goto out; + } + dout(20)<<__func__<<" gc range is " << std::hex << dirty_start + << "~" << dirty_end - dirty_start << std::dec << dendl; + } + o->extent_map.compress_extent_map(dirty_start, dirty_end - dirty_start); + o->extent_map.dirty_range(dirty_start, dirty_end - dirty_start); + + r = 0; + + out: + return r; +} + +int BlueStore::_write(TransContext *txc, + CollectionRef& c, + OnodeRef& o, + uint64_t offset, size_t length, + bufferlist& bl, + uint32_t fadvise_flags) +{ + dout(15) << __func__ << " " << c->cid << " " << o->oid + << " 0x" << std::hex << offset << "~" << length << std::dec + << dendl; + int r = 0; + if (offset + length >= OBJECT_MAX_SIZE) { + r = -E2BIG; + } else { + _assign_nid(txc, o); + r = _do_write(txc, c, o, offset, length, bl, fadvise_flags); + txc->write_onode(o); + } + dout(10) << __func__ << " " << c->cid << " " << o->oid + << " 0x" << std::hex << offset << "~" << length << std::dec + << " = " << r << dendl; + return r; +} + +int BlueStore::_zero(TransContext *txc, + CollectionRef& c, + OnodeRef& o, + uint64_t offset, size_t length) +{ + dout(15) << __func__ << " " << c->cid << " " << o->oid + << " 0x" << std::hex << offset << "~" << length << std::dec + << dendl; + int r = 0; + if (offset + length >= OBJECT_MAX_SIZE) { + r = -E2BIG; + } else { + _assign_nid(txc, o); + r = _do_zero(txc, c, o, offset, length); + } + dout(10) << __func__ << " " << c->cid << " " << o->oid + << " 0x" << std::hex << offset << "~" << length << std::dec + << " = " << r << dendl; + return r; +} + +int BlueStore::_do_zero(TransContext *txc, + CollectionRef& c, + OnodeRef& o, + uint64_t offset, size_t length) +{ + dout(15) << __func__ << " " << c->cid << " " << o->oid + << " 0x" << std::hex << offset << "~" << length << std::dec + << dendl; + int r = 0; + + _dump_onode<30>(cct, *o); + + WriteContext wctx; + o->extent_map.fault_range(db, offset, length); + o->extent_map.punch_hole(c, offset, length, &wctx.old_extents); + o->extent_map.dirty_range(offset, length); + _wctx_finish(txc, c, o, &wctx); + + if (length > 0 && offset + length > o->onode.size) { + o->onode.size = offset + length; + dout(20) << __func__ << " extending size to " << offset + length + << dendl; + } + txc->write_onode(o); + + dout(10) << __func__ << " " << c->cid << " " << o->oid + << " 0x" << std::hex << offset << "~" << length << std::dec + << " = " << r << dendl; + return r; +} + +void BlueStore::_do_truncate( + TransContext *txc, CollectionRef& c, OnodeRef o, uint64_t offset, + set<SharedBlob*> *maybe_unshared_blobs) +{ + dout(15) << __func__ << " " << c->cid << " " << o->oid + << " 0x" << std::hex << offset << std::dec << dendl; + + _dump_onode<30>(cct, *o); + + if (offset == o->onode.size) + return; + + WriteContext wctx; + if (offset < o->onode.size) { + uint64_t length = o->onode.size - offset; + o->extent_map.fault_range(db, offset, length); + o->extent_map.punch_hole(c, offset, length, &wctx.old_extents); + o->extent_map.dirty_range(offset, length); + _wctx_finish(txc, c, o, &wctx, maybe_unshared_blobs); + + // if we have shards past EOF, ask for a reshard + if (!o->onode.extent_map_shards.empty() && + o->onode.extent_map_shards.back().offset >= offset) { + dout(10) << __func__ << " request reshard past EOF" << dendl; + if (offset) { + o->extent_map.request_reshard(offset - 1, offset + length); + } else { + o->extent_map.request_reshard(0, length); + } + } + } + + o->onode.size = offset; + + if (bdev->is_smr()) { + // On zoned devices, we currently support only removing an object or + // truncating it to zero size, both of which fall through this code path. + ceph_assert(offset == 0 && !wctx.old_extents.empty()); + int64_t ondisk_offset = wctx.old_extents.begin()->r.begin()->offset; + txc->zoned_note_truncated_object(o, ondisk_offset); + } + + txc->write_onode(o); +} + +int BlueStore::_truncate(TransContext *txc, + CollectionRef& c, + OnodeRef& o, + uint64_t offset) +{ + dout(15) << __func__ << " " << c->cid << " " << o->oid + << " 0x" << std::hex << offset << std::dec + << dendl; + int r = 0; + if (offset >= OBJECT_MAX_SIZE) { + r = -E2BIG; + } else { + _do_truncate(txc, c, o, offset); + } + dout(10) << __func__ << " " << c->cid << " " << o->oid + << " 0x" << std::hex << offset << std::dec + << " = " << r << dendl; + return r; +} + +int BlueStore::_do_remove( + TransContext *txc, + CollectionRef& c, + OnodeRef o) +{ + set<SharedBlob*> maybe_unshared_blobs; + bool is_gen = !o->oid.is_no_gen(); + _do_truncate(txc, c, o, 0, is_gen ? &maybe_unshared_blobs : nullptr); + if (o->onode.has_omap()) { + o->flush(); + _do_omap_clear(txc, o); + } + o->exists = false; + string key; + for (auto &s : o->extent_map.shards) { + dout(20) << __func__ << " removing shard 0x" << std::hex + << s.shard_info->offset << std::dec << dendl; + generate_extent_shard_key_and_apply(o->key, s.shard_info->offset, &key, + [&](const string& final_key) { + txc->t->rmkey(PREFIX_OBJ, final_key); + } + ); + } + txc->t->rmkey(PREFIX_OBJ, o->key.c_str(), o->key.size()); + txc->note_removed_object(o); + o->extent_map.clear(); + o->onode = bluestore_onode_t(); + _debug_obj_on_delete(o->oid); + + if (!is_gen || maybe_unshared_blobs.empty()) { + return 0; + } + + // see if we can unshare blobs still referenced by the head + dout(10) << __func__ << " gen and maybe_unshared_blobs " + << maybe_unshared_blobs << dendl; + ghobject_t nogen = o->oid; + nogen.generation = ghobject_t::NO_GEN; + OnodeRef h = c->get_onode(nogen, false); + + if (!h || !h->exists) { + return 0; + } + + dout(20) << __func__ << " checking for unshareable blobs on " << h + << " " << h->oid << dendl; + map<SharedBlob*,bluestore_extent_ref_map_t> expect; + for (auto& e : h->extent_map.extent_map) { + const bluestore_blob_t& b = e.blob->get_blob(); + SharedBlob *sb = e.blob->shared_blob.get(); + if (b.is_shared() && + sb->loaded && + maybe_unshared_blobs.count(sb)) { + if (b.is_compressed()) { + expect[sb].get(0, b.get_ondisk_length()); + } else { + b.map(e.blob_offset, e.length, [&](uint64_t off, uint64_t len) { + expect[sb].get(off, len); + return 0; + }); + } + } + } + + vector<SharedBlob*> unshared_blobs; + unshared_blobs.reserve(maybe_unshared_blobs.size()); + for (auto& p : expect) { + dout(20) << " ? " << *p.first << " vs " << p.second << dendl; + if (p.first->persistent->ref_map == p.second) { + SharedBlob *sb = p.first; + dout(20) << __func__ << " unsharing " << *sb << dendl; + unshared_blobs.push_back(sb); + txc->unshare_blob(sb); + uint64_t sbid = c->make_blob_unshared(sb); + string key; + get_shared_blob_key(sbid, &key); + txc->t->rmkey(PREFIX_SHARED_BLOB, key); + } + } + + if (unshared_blobs.empty()) { + return 0; + } + + for (auto& e : h->extent_map.extent_map) { + const bluestore_blob_t& b = e.blob->get_blob(); + SharedBlob *sb = e.blob->shared_blob.get(); + if (b.is_shared() && + std::find(unshared_blobs.begin(), unshared_blobs.end(), + sb) != unshared_blobs.end()) { + dout(20) << __func__ << " unsharing " << e << dendl; + bluestore_blob_t& blob = e.blob->dirty_blob(); + blob.clear_flag(bluestore_blob_t::FLAG_SHARED); + h->extent_map.dirty_range(e.logical_offset, 1); + } + } + txc->write_onode(h); + + return 0; +} + +int BlueStore::_remove(TransContext *txc, + CollectionRef& c, + OnodeRef &o) +{ + dout(15) << __func__ << " " << c->cid << " " << o->oid + << " onode " << o.get() + << " txc "<< txc << dendl; + + auto start_time = mono_clock::now(); + int r = _do_remove(txc, c, o); + log_latency_fn( + __func__, + l_bluestore_remove_lat, + mono_clock::now() - start_time, + cct->_conf->bluestore_log_op_age, + [&](const ceph::timespan& lat) { + ostringstream ostr; + ostr << ", lat = " << timespan_str(lat) + << " cid =" << c->cid + << " oid =" << o->oid; + return ostr.str(); + } + ); + + dout(10) << __func__ << " " << c->cid << " " << o->oid << " = " << r << dendl; + return r; +} + +int BlueStore::_setattr(TransContext *txc, + CollectionRef& c, + OnodeRef& o, + const string& name, + bufferptr& val) +{ + dout(15) << __func__ << " " << c->cid << " " << o->oid + << " " << name << " (" << val.length() << " bytes)" + << dendl; + int r = 0; + if (val.is_partial()) { + auto& b = o->onode.attrs[name.c_str()] = bufferptr(val.c_str(), + val.length()); + b.reassign_to_mempool(mempool::mempool_bluestore_cache_meta); + } else { + auto& b = o->onode.attrs[name.c_str()] = val; + b.reassign_to_mempool(mempool::mempool_bluestore_cache_meta); + } + txc->write_onode(o); + dout(10) << __func__ << " " << c->cid << " " << o->oid + << " " << name << " (" << val.length() << " bytes)" + << " = " << r << dendl; + return r; +} + +int BlueStore::_setattrs(TransContext *txc, + CollectionRef& c, + OnodeRef& o, + const map<string,bufferptr>& aset) +{ + dout(15) << __func__ << " " << c->cid << " " << o->oid + << " " << aset.size() << " keys" + << dendl; + int r = 0; + for (map<string,bufferptr>::const_iterator p = aset.begin(); + p != aset.end(); ++p) { + if (p->second.is_partial()) { + auto& b = o->onode.attrs[p->first.c_str()] = + bufferptr(p->second.c_str(), p->second.length()); + b.reassign_to_mempool(mempool::mempool_bluestore_cache_meta); + } else { + auto& b = o->onode.attrs[p->first.c_str()] = p->second; + b.reassign_to_mempool(mempool::mempool_bluestore_cache_meta); + } + } + txc->write_onode(o); + dout(10) << __func__ << " " << c->cid << " " << o->oid + << " " << aset.size() << " keys" + << " = " << r << dendl; + return r; +} + + +int BlueStore::_rmattr(TransContext *txc, + CollectionRef& c, + OnodeRef& o, + const string& name) +{ + dout(15) << __func__ << " " << c->cid << " " << o->oid + << " " << name << dendl; + int r = 0; + auto it = o->onode.attrs.find(name.c_str()); + if (it == o->onode.attrs.end()) + goto out; + + o->onode.attrs.erase(it); + txc->write_onode(o); + + out: + dout(10) << __func__ << " " << c->cid << " " << o->oid + << " " << name << " = " << r << dendl; + return r; +} + +int BlueStore::_rmattrs(TransContext *txc, + CollectionRef& c, + OnodeRef& o) +{ + dout(15) << __func__ << " " << c->cid << " " << o->oid << dendl; + int r = 0; + + if (o->onode.attrs.empty()) + goto out; + + o->onode.attrs.clear(); + txc->write_onode(o); + + out: + dout(10) << __func__ << " " << c->cid << " " << o->oid << " = " << r << dendl; + return r; +} + +void BlueStore::_do_omap_clear(TransContext *txc, OnodeRef& o) +{ + const string& omap_prefix = o->get_omap_prefix(); + string prefix, tail; + o->get_omap_header(&prefix); + o->get_omap_tail(&tail); + txc->t->rm_range_keys(omap_prefix, prefix, tail); + txc->t->rmkey(omap_prefix, tail); + dout(20) << __func__ << " remove range start: " + << pretty_binary_string(prefix) << " end: " + << pretty_binary_string(tail) << dendl; +} + +int BlueStore::_omap_clear(TransContext *txc, + CollectionRef& c, + OnodeRef& o) +{ + dout(15) << __func__ << " " << c->cid << " " << o->oid << dendl; + int r = 0; + if (o->onode.has_omap()) { + o->flush(); + _do_omap_clear(txc, o); + o->onode.clear_omap_flag(); + txc->write_onode(o); + } + dout(10) << __func__ << " " << c->cid << " " << o->oid << " = " << r << dendl; + return r; +} + +int BlueStore::_omap_setkeys(TransContext *txc, + CollectionRef& c, + OnodeRef& o, + bufferlist &bl) +{ + dout(15) << __func__ << " " << c->cid << " " << o->oid << dendl; + int r; + auto p = bl.cbegin(); + __u32 num; + if (!o->onode.has_omap()) { + if (o->oid.is_pgmeta()) { + o->onode.set_omap_flags_pgmeta(); + } else { + o->onode.set_omap_flags(per_pool_omap == OMAP_BULK); + } + txc->write_onode(o); + + const string& prefix = o->get_omap_prefix(); + string key_tail; + bufferlist tail; + o->get_omap_tail(&key_tail); + txc->t->set(prefix, key_tail, tail); + } else { + txc->note_modified_object(o); + } + const string& prefix = o->get_omap_prefix(); + string final_key; + o->get_omap_key(string(), &final_key); + size_t base_key_len = final_key.size(); + decode(num, p); + while (num--) { + string key; + bufferlist value; + decode(key, p); + decode(value, p); + final_key.resize(base_key_len); // keep prefix + final_key += key; + dout(20) << __func__ << " " << pretty_binary_string(final_key) + << " <- " << key << dendl; + txc->t->set(prefix, final_key, value); + } + r = 0; + dout(10) << __func__ << " " << c->cid << " " << o->oid << " = " << r << dendl; + return r; +} + +int BlueStore::_omap_setheader(TransContext *txc, + CollectionRef& c, + OnodeRef &o, + bufferlist& bl) +{ + dout(15) << __func__ << " " << c->cid << " " << o->oid << dendl; + int r; + string key; + if (!o->onode.has_omap()) { + if (o->oid.is_pgmeta()) { + o->onode.set_omap_flags_pgmeta(); + } else { + o->onode.set_omap_flags(per_pool_omap == OMAP_BULK); + } + txc->write_onode(o); + + const string& prefix = o->get_omap_prefix(); + string key_tail; + bufferlist tail; + o->get_omap_tail(&key_tail); + txc->t->set(prefix, key_tail, tail); + } else { + txc->note_modified_object(o); + } + const string& prefix = o->get_omap_prefix(); + o->get_omap_header(&key); + txc->t->set(prefix, key, bl); + r = 0; + dout(10) << __func__ << " " << c->cid << " " << o->oid << " = " << r << dendl; + return r; +} + +int BlueStore::_omap_rmkeys(TransContext *txc, + CollectionRef& c, + OnodeRef& o, + bufferlist& bl) +{ + dout(15) << __func__ << " " << c->cid << " " << o->oid << dendl; + int r = 0; + auto p = bl.cbegin(); + __u32 num; + string final_key; + + if (!o->onode.has_omap()) { + goto out; + } + { + const string& prefix = o->get_omap_prefix(); + o->get_omap_key(string(), &final_key); + size_t base_key_len = final_key.size(); + decode(num, p); + while (num--) { + string key; + decode(key, p); + final_key.resize(base_key_len); // keep prefix + final_key += key; + dout(20) << __func__ << " rm " << pretty_binary_string(final_key) + << " <- " << key << dendl; + txc->t->rmkey(prefix, final_key); + } + } + txc->note_modified_object(o); + + out: + dout(10) << __func__ << " " << c->cid << " " << o->oid << " = " << r << dendl; + return r; +} + +int BlueStore::_omap_rmkey_range(TransContext *txc, + CollectionRef& c, + OnodeRef& o, + const string& first, const string& last) +{ + dout(15) << __func__ << " " << c->cid << " " << o->oid << dendl; + string key_first, key_last; + int r = 0; + if (!o->onode.has_omap()) { + goto out; + } + { + const string& prefix = o->get_omap_prefix(); + o->flush(); + o->get_omap_key(first, &key_first); + o->get_omap_key(last, &key_last); + txc->t->rm_range_keys(prefix, key_first, key_last); + dout(20) << __func__ << " remove range start: " + << pretty_binary_string(key_first) << " end: " + << pretty_binary_string(key_last) << dendl; + } + txc->note_modified_object(o); + + out: + dout(10) << __func__ << " " << c->cid << " " << o->oid << " = " << r << dendl; + return r; +} + +int BlueStore::_set_alloc_hint( + TransContext *txc, + CollectionRef& c, + OnodeRef& o, + uint64_t expected_object_size, + uint64_t expected_write_size, + uint32_t flags) +{ + dout(15) << __func__ << " " << c->cid << " " << o->oid + << " object_size " << expected_object_size + << " write_size " << expected_write_size + << " flags " << ceph_osd_alloc_hint_flag_string(flags) + << dendl; + int r = 0; + o->onode.expected_object_size = expected_object_size; + o->onode.expected_write_size = expected_write_size; + o->onode.alloc_hint_flags = flags; + txc->write_onode(o); + dout(10) << __func__ << " " << c->cid << " " << o->oid + << " object_size " << expected_object_size + << " write_size " << expected_write_size + << " flags " << ceph_osd_alloc_hint_flag_string(flags) + << " = " << r << dendl; + return r; +} + +int BlueStore::_clone(TransContext *txc, + CollectionRef& c, + OnodeRef& oldo, + OnodeRef& newo) +{ + dout(15) << __func__ << " " << c->cid << " " << oldo->oid << " -> " + << newo->oid << dendl; + int r = 0; + if (oldo->oid.hobj.get_hash() != newo->oid.hobj.get_hash()) { + derr << __func__ << " mismatched hash on " << oldo->oid + << " and " << newo->oid << dendl; + return -EINVAL; + } + + _assign_nid(txc, newo); + + // clone data + oldo->flush(); + _do_truncate(txc, c, newo, 0); + if (cct->_conf->bluestore_clone_cow) { + _do_clone_range(txc, c, oldo, newo, 0, oldo->onode.size, 0); + } else { + bufferlist bl; + r = _do_read(c.get(), oldo, 0, oldo->onode.size, bl, 0); + if (r < 0) + goto out; + r = _do_write(txc, c, newo, 0, oldo->onode.size, bl, 0); + if (r < 0) + goto out; + } + + // clone attrs + newo->onode.attrs = oldo->onode.attrs; + + // clone omap + if (newo->onode.has_omap()) { + dout(20) << __func__ << " clearing old omap data" << dendl; + newo->flush(); + _do_omap_clear(txc, newo); + newo->onode.clear_omap_flag(); + } + if (oldo->onode.has_omap()) { + dout(20) << __func__ << " copying omap data" << dendl; + if (newo->oid.is_pgmeta()) { + newo->onode.set_omap_flags_pgmeta(); + } else { + newo->onode.set_omap_flags(per_pool_omap == OMAP_BULK); + } + const string& prefix = newo->get_omap_prefix(); + string head, tail; + oldo->get_omap_header(&head); + oldo->get_omap_tail(&tail); + KeyValueDB::Iterator it = db->get_iterator(prefix, 0, KeyValueDB::IteratorBounds{head, tail}); + it->lower_bound(head); + while (it->valid()) { + if (it->key() >= tail) { + dout(30) << __func__ << " reached tail" << dendl; + break; + } else { + dout(30) << __func__ << " got header/data " + << pretty_binary_string(it->key()) << dendl; + string key; + newo->rewrite_omap_key(it->key(), &key); + txc->t->set(prefix, key, it->value()); + } + it->next(); + } + string new_tail; + bufferlist new_tail_value; + newo->get_omap_tail(&new_tail); + txc->t->set(prefix, new_tail, new_tail_value); + } + + txc->write_onode(newo); + r = 0; + + out: + dout(10) << __func__ << " " << c->cid << " " << oldo->oid << " -> " + << newo->oid << " = " << r << dendl; + return r; +} + +int BlueStore::_do_clone_range( + TransContext *txc, + CollectionRef& c, + OnodeRef& oldo, + OnodeRef& newo, + uint64_t srcoff, + uint64_t length, + uint64_t dstoff) +{ + dout(15) << __func__ << " " << c->cid << " " << oldo->oid << " -> " + << newo->oid + << " 0x" << std::hex << srcoff << "~" << length << " -> " + << " 0x" << dstoff << "~" << length << std::dec << dendl; + oldo->extent_map.fault_range(db, srcoff, length); + newo->extent_map.fault_range(db, dstoff, length); + _dump_onode<30>(cct, *oldo); + _dump_onode<30>(cct, *newo); + + oldo->extent_map.dup(this, txc, c, oldo, newo, srcoff, length, dstoff); + _dump_onode<30>(cct, *oldo); + _dump_onode<30>(cct, *newo); + return 0; +} + +int BlueStore::_clone_range(TransContext *txc, + CollectionRef& c, + OnodeRef& oldo, + OnodeRef& newo, + uint64_t srcoff, uint64_t length, uint64_t dstoff) +{ + dout(15) << __func__ << " " << c->cid << " " << oldo->oid << " -> " + << newo->oid << " from 0x" << std::hex << srcoff << "~" << length + << " to offset 0x" << dstoff << std::dec << dendl; + int r = 0; + + if (srcoff + length >= OBJECT_MAX_SIZE || + dstoff + length >= OBJECT_MAX_SIZE) { + r = -E2BIG; + goto out; + } + if (srcoff + length > oldo->onode.size) { + r = -EINVAL; + goto out; + } + + _assign_nid(txc, newo); + + if (length > 0) { + if (cct->_conf->bluestore_clone_cow) { + _do_zero(txc, c, newo, dstoff, length); + _do_clone_range(txc, c, oldo, newo, srcoff, length, dstoff); + } else { + bufferlist bl; + r = _do_read(c.get(), oldo, srcoff, length, bl, 0); + if (r < 0) + goto out; + r = _do_write(txc, c, newo, dstoff, bl.length(), bl, 0); + if (r < 0) + goto out; + } + } + + txc->write_onode(newo); + r = 0; + + out: + dout(10) << __func__ << " " << c->cid << " " << oldo->oid << " -> " + << newo->oid << " from 0x" << std::hex << srcoff << "~" << length + << " to offset 0x" << dstoff << std::dec + << " = " << r << dendl; + return r; +} + +int BlueStore::_rename(TransContext *txc, + CollectionRef& c, + OnodeRef& oldo, + OnodeRef& newo, + const ghobject_t& new_oid) +{ + dout(15) << __func__ << " " << c->cid << " " << oldo->oid << " -> " + << new_oid << dendl; + int r; + ghobject_t old_oid = oldo->oid; + mempool::bluestore_cache_meta::string new_okey; + + if (newo) { + if (newo->exists) { + r = -EEXIST; + goto out; + } + ceph_assert(txc->onodes.count(newo) == 0); + } + + txc->t->rmkey(PREFIX_OBJ, oldo->key.c_str(), oldo->key.size()); + + // rewrite shards + { + oldo->extent_map.fault_range(db, 0, oldo->onode.size); + get_object_key(cct, new_oid, &new_okey); + string key; + for (auto &s : oldo->extent_map.shards) { + generate_extent_shard_key_and_apply(oldo->key, s.shard_info->offset, &key, + [&](const string& final_key) { + txc->t->rmkey(PREFIX_OBJ, final_key); + } + ); + s.dirty = true; + } + } + + newo = oldo; + txc->write_onode(newo); + + // this adjusts oldo->{oid,key}, and reset oldo to a fresh empty + // Onode in the old slot + c->onode_map.rename(oldo, old_oid, new_oid, new_okey); + r = 0; + + // hold a ref to new Onode in old name position, to ensure we don't drop + // it from the cache before this txc commits (or else someone may come along + // and read newo's metadata via the old name). + txc->note_modified_object(oldo); + + out: + dout(10) << __func__ << " " << c->cid << " " << old_oid << " -> " + << new_oid << " = " << r << dendl; + return r; +} + +// collections + +int BlueStore::_create_collection( + TransContext *txc, + const coll_t &cid, + unsigned bits, + CollectionRef *c) +{ + dout(15) << __func__ << " " << cid << " bits " << bits << dendl; + int r; + bufferlist bl; + + { + std::unique_lock l(coll_lock); + if (*c) { + r = -EEXIST; + goto out; + } + auto p = new_coll_map.find(cid); + ceph_assert(p != new_coll_map.end()); + *c = p->second; + (*c)->cnode.bits = bits; + coll_map[cid] = *c; + new_coll_map.erase(p); + } + encode((*c)->cnode, bl); + txc->t->set(PREFIX_COLL, stringify(cid), bl); + r = 0; + + out: + dout(10) << __func__ << " " << cid << " bits " << bits << " = " << r << dendl; + return r; +} + +int BlueStore::_remove_collection(TransContext *txc, const coll_t &cid, + CollectionRef *c) +{ + dout(15) << __func__ << " " << cid << dendl; + int r; + + (*c)->flush_all_but_last(); + { + std::unique_lock l(coll_lock); + if (!*c) { + r = -ENOENT; + goto out; + } + size_t nonexistent_count = 0; + ceph_assert((*c)->exists); + if ((*c)->onode_map.map_any([&](Onode* o) { + if (o->exists) { + dout(1) << __func__ << " " << o->oid << " " << o + << " exists in onode_map" << dendl; + return true; + } + ++nonexistent_count; + return false; + })) { + r = -ENOTEMPTY; + goto out; + } + vector<ghobject_t> ls; + ghobject_t next; + // Enumerate onodes in db, up to nonexistent_count + 1 + // then check if all of them are marked as non-existent. + // Bypass the check if (next != ghobject_t::get_max()) + r = _collection_list(c->get(), ghobject_t(), ghobject_t::get_max(), + nonexistent_count + 1, false, &ls, &next); + if (r >= 0) { + // If true mean collecton has more objects than nonexistent_count, + // so bypass check. + bool exists = (!next.is_max()); + for (auto it = ls.begin(); !exists && it < ls.end(); ++it) { + dout(10) << __func__ << " oid " << *it << dendl; + auto onode = (*c)->onode_map.lookup(*it); + exists = !onode || onode->exists; + if (exists) { + dout(1) << __func__ << " " << *it + << " exists in db, " + << (!onode ? "not present in ram" : "present in ram") + << dendl; + } + } + if (!exists) { + _do_remove_collection(txc, c); + r = 0; + } else { + dout(10) << __func__ << " " << cid + << " is non-empty" << dendl; + r = -ENOTEMPTY; + } + } + } +out: + dout(10) << __func__ << " " << cid << " = " << r << dendl; + return r; +} + +void BlueStore::_do_remove_collection(TransContext *txc, + CollectionRef *c) +{ + coll_map.erase((*c)->cid); + txc->removed_collections.push_back(*c); + (*c)->exists = false; + _osr_register_zombie((*c)->osr.get()); + txc->t->rmkey(PREFIX_COLL, stringify((*c)->cid)); + c->reset(); +} + +int BlueStore::_split_collection(TransContext *txc, + CollectionRef& c, + CollectionRef& d, + unsigned bits, int rem) +{ + dout(15) << __func__ << " " << c->cid << " to " << d->cid << " " + << " bits " << bits << dendl; + std::unique_lock l(c->lock); + std::unique_lock l2(d->lock); + int r; + + // flush all previous deferred writes on this sequencer. this is a bit + // heavyweight, but we need to make sure all deferred writes complete + // before we split as the new collection's sequencer may need to order + // this after those writes, and we don't bother with the complexity of + // moving those TransContexts over to the new osr. + _osr_drain_preceding(txc); + + // move any cached items (onodes and referenced shared blobs) that will + // belong to the child collection post-split. leave everything else behind. + // this may include things that don't strictly belong to the now-smaller + // parent split, but the OSD will always send us a split for every new + // child. + + spg_t pgid, dest_pgid; + bool is_pg = c->cid.is_pg(&pgid); + ceph_assert(is_pg); + is_pg = d->cid.is_pg(&dest_pgid); + ceph_assert(is_pg); + + // the destination should initially be empty. + ceph_assert(d->onode_map.empty()); + ceph_assert(d->shared_blob_set.empty()); + ceph_assert(d->cnode.bits == bits); + + c->split_cache(d.get()); + + // adjust bits. note that this will be redundant for all but the first + // split call for this parent (first child). + c->cnode.bits = bits; + ceph_assert(d->cnode.bits == bits); + r = 0; + + bufferlist bl; + encode(c->cnode, bl); + txc->t->set(PREFIX_COLL, stringify(c->cid), bl); + + dout(10) << __func__ << " " << c->cid << " to " << d->cid << " " + << " bits " << bits << " = " << r << dendl; + return r; +} + +int BlueStore::_merge_collection( + TransContext *txc, + CollectionRef *c, + CollectionRef& d, + unsigned bits) +{ + dout(15) << __func__ << " " << (*c)->cid << " to " << d->cid + << " bits " << bits << dendl; + std::unique_lock l((*c)->lock); + std::unique_lock l2(d->lock); + int r; + + coll_t cid = (*c)->cid; + + // flush all previous deferred writes on the source collection to ensure + // that all deferred writes complete before we merge as the target collection's + // sequencer may need to order new ops after those writes. + + _osr_drain((*c)->osr.get()); + + // move any cached items (onodes and referenced shared blobs) that will + // belong to the child collection post-split. leave everything else behind. + // this may include things that don't strictly belong to the now-smaller + // parent split, but the OSD will always send us a split for every new + // child. + + spg_t pgid, dest_pgid; + bool is_pg = cid.is_pg(&pgid); + ceph_assert(is_pg); + is_pg = d->cid.is_pg(&dest_pgid); + ceph_assert(is_pg); + + // adjust bits. note that this will be redundant for all but the first + // merge call for the parent/target. + d->cnode.bits = bits; + + // behavior depends on target (d) bits, so this after that is updated. + (*c)->split_cache(d.get()); + + // remove source collection + { + std::unique_lock l3(coll_lock); + _do_remove_collection(txc, c); + } + + r = 0; + + bufferlist bl; + encode(d->cnode, bl); + txc->t->set(PREFIX_COLL, stringify(d->cid), bl); + + dout(10) << __func__ << " " << cid << " to " << d->cid << " " + << " bits " << bits << " = " << r << dendl; + return r; +} + +void BlueStore::log_latency( + const char* name, + int idx, + const ceph::timespan& l, + double lat_threshold, + const char* info) const +{ + logger->tinc(idx, l); + if (lat_threshold > 0.0 && + l >= make_timespan(lat_threshold)) { + dout(0) << __func__ << " slow operation observed for " << name + << ", latency = " << l + << info + << dendl; + } +} + +void BlueStore::log_latency_fn( + const char* name, + int idx, + const ceph::timespan& l, + double lat_threshold, + std::function<string (const ceph::timespan& lat)> fn) const +{ + logger->tinc(idx, l); + if (lat_threshold > 0.0 && + l >= make_timespan(lat_threshold)) { + dout(0) << __func__ << " slow operation observed for " << name + << ", latency = " << l + << fn(l) + << dendl; + } +} + +#if defined(WITH_LTTNG) +void BlueStore::BlueStoreThrottle::emit_initial_tracepoint( + KeyValueDB &db, + TransContext &txc, + mono_clock::time_point start_throttle_acquire) +{ + pending_kv_ios += txc.ios; + if (txc.deferred_txn) { + pending_deferred_ios += txc.ios; + } + + uint64_t started = 0; + uint64_t completed = 0; + if (should_trace(&started, &completed)) { + txc.tracing = true; + uint64_t rocksdb_base_level, + rocksdb_estimate_pending_compaction_bytes, + rocksdb_cur_size_all_mem_tables, + rocksdb_compaction_pending, + rocksdb_mem_table_flush_pending, + rocksdb_num_running_compactions, + rocksdb_num_running_flushes, + rocksdb_actual_delayed_write_rate; + db.get_property( + "rocksdb.base-level", + &rocksdb_base_level); + db.get_property( + "rocksdb.estimate-pending-compaction-bytes", + &rocksdb_estimate_pending_compaction_bytes); + db.get_property( + "rocksdb.cur-size-all-mem-tables", + &rocksdb_cur_size_all_mem_tables); + db.get_property( + "rocksdb.compaction-pending", + &rocksdb_compaction_pending); + db.get_property( + "rocksdb.mem-table-flush-pending", + &rocksdb_mem_table_flush_pending); + db.get_property( + "rocksdb.num-running-compactions", + &rocksdb_num_running_compactions); + db.get_property( + "rocksdb.num-running-flushes", + &rocksdb_num_running_flushes); + db.get_property( + "rocksdb.actual-delayed-write-rate", + &rocksdb_actual_delayed_write_rate); + + + tracepoint( + bluestore, + transaction_initial_state, + txc.osr->get_sequencer_id(), + txc.seq, + throttle_bytes.get_current(), + throttle_deferred_bytes.get_current(), + pending_kv_ios, + pending_deferred_ios, + started, + completed, + ceph::to_seconds<double>(mono_clock::now() - start_throttle_acquire)); + + tracepoint( + bluestore, + transaction_initial_state_rocksdb, + txc.osr->get_sequencer_id(), + txc.seq, + rocksdb_base_level, + rocksdb_estimate_pending_compaction_bytes, + rocksdb_cur_size_all_mem_tables, + rocksdb_compaction_pending, + rocksdb_mem_table_flush_pending, + rocksdb_num_running_compactions, + rocksdb_num_running_flushes, + rocksdb_actual_delayed_write_rate); + } +} +#endif + +mono_clock::duration BlueStore::BlueStoreThrottle::log_state_latency( + TransContext &txc, PerfCounters *logger, int state) +{ + mono_clock::time_point now = mono_clock::now(); + mono_clock::duration lat = now - txc.last_stamp; + logger->tinc(state, lat); +#if defined(WITH_LTTNG) + if (txc.tracing && + state >= l_bluestore_state_prepare_lat && + state <= l_bluestore_state_done_lat) { + OID_ELAPSED("", lat.to_nsec() / 1000.0, txc.get_state_latency_name(state)); + tracepoint( + bluestore, + transaction_state_duration, + txc.osr->get_sequencer_id(), + txc.seq, + state, + ceph::to_seconds<double>(lat)); + } +#endif + txc.last_stamp = now; + return lat; +} + +bool BlueStore::BlueStoreThrottle::try_start_transaction( + KeyValueDB &db, + TransContext &txc, + mono_clock::time_point start_throttle_acquire) +{ + throttle_bytes.get(txc.cost); + + if (!txc.deferred_txn || throttle_deferred_bytes.get_or_fail(txc.cost)) { + emit_initial_tracepoint(db, txc, start_throttle_acquire); + return true; + } else { + return false; + } +} + +void BlueStore::BlueStoreThrottle::finish_start_transaction( + KeyValueDB &db, + TransContext &txc, + mono_clock::time_point start_throttle_acquire) +{ + ceph_assert(txc.deferred_txn); + throttle_deferred_bytes.get(txc.cost); + emit_initial_tracepoint(db, txc, start_throttle_acquire); +} + +#if defined(WITH_LTTNG) +void BlueStore::BlueStoreThrottle::complete_kv(TransContext &txc) +{ + pending_kv_ios -= 1; + ios_completed_since_last_traced++; + if (txc.tracing) { + tracepoint( + bluestore, + transaction_commit_latency, + txc.osr->get_sequencer_id(), + txc.seq, + ceph::to_seconds<double>(mono_clock::now() - txc.start)); + } +} +#endif + +#if defined(WITH_LTTNG) +void BlueStore::BlueStoreThrottle::complete(TransContext &txc) +{ + if (txc.deferred_txn) { + pending_deferred_ios -= 1; + } + if (txc.tracing) { + mono_clock::time_point now = mono_clock::now(); + mono_clock::duration lat = now - txc.start; + tracepoint( + bluestore, + transaction_total_duration, + txc.osr->get_sequencer_id(), + txc.seq, + ceph::to_seconds<double>(lat)); + } +} +#endif + +// DB key value Histogram +#define KEY_SLAB 32 +#define VALUE_SLAB 64 + +const string prefix_onode = "o"; +const string prefix_onode_shard = "x"; +const string prefix_other = "Z"; + +int BlueStore::DBHistogram::get_key_slab(size_t sz) +{ + return (sz/KEY_SLAB); +} + +string BlueStore::DBHistogram::get_key_slab_to_range(int slab) +{ + int lower_bound = slab * KEY_SLAB; + int upper_bound = (slab + 1) * KEY_SLAB; + string ret = "[" + stringify(lower_bound) + "," + stringify(upper_bound) + ")"; + return ret; +} + +int BlueStore::DBHistogram::get_value_slab(size_t sz) +{ + return (sz/VALUE_SLAB); +} + +string BlueStore::DBHistogram::get_value_slab_to_range(int slab) +{ + int lower_bound = slab * VALUE_SLAB; + int upper_bound = (slab + 1) * VALUE_SLAB; + string ret = "[" + stringify(lower_bound) + "," + stringify(upper_bound) + ")"; + return ret; +} + +void BlueStore::DBHistogram::update_hist_entry(map<string, map<int, struct key_dist> > &key_hist, + const string &prefix, size_t key_size, size_t value_size) +{ + uint32_t key_slab = get_key_slab(key_size); + uint32_t value_slab = get_value_slab(value_size); + key_hist[prefix][key_slab].count++; + key_hist[prefix][key_slab].max_len = + std::max<size_t>(key_size, key_hist[prefix][key_slab].max_len); + key_hist[prefix][key_slab].val_map[value_slab].count++; + key_hist[prefix][key_slab].val_map[value_slab].max_len = + std::max<size_t>(value_size, + key_hist[prefix][key_slab].val_map[value_slab].max_len); +} + +void BlueStore::DBHistogram::dump(Formatter *f) +{ + f->open_object_section("rocksdb_value_distribution"); + for (auto i : value_hist) { + f->dump_unsigned(get_value_slab_to_range(i.first).data(), i.second); + } + f->close_section(); + + f->open_object_section("rocksdb_key_value_histogram"); + for (auto i : key_hist) { + f->dump_string("prefix", i.first); + f->open_object_section("key_hist"); + for ( auto k : i.second) { + f->dump_unsigned(get_key_slab_to_range(k.first).data(), k.second.count); + f->dump_unsigned("max_len", k.second.max_len); + f->open_object_section("value_hist"); + for ( auto j : k.second.val_map) { + f->dump_unsigned(get_value_slab_to_range(j.first).data(), j.second.count); + f->dump_unsigned("max_len", j.second.max_len); + } + f->close_section(); + } + f->close_section(); + } + f->close_section(); +} + +//Itrerates through the db and collects the stats +void BlueStore::generate_db_histogram(Formatter *f) +{ + //globals + uint64_t num_onodes = 0; + uint64_t num_shards = 0; + uint64_t num_super = 0; + uint64_t num_coll = 0; + uint64_t num_omap = 0; + uint64_t num_pgmeta_omap = 0; + uint64_t num_deferred = 0; + uint64_t num_alloc = 0; + uint64_t num_stat = 0; + uint64_t num_others = 0; + uint64_t num_shared_shards = 0; + size_t max_key_size =0, max_value_size = 0; + uint64_t total_key_size = 0, total_value_size = 0; + size_t key_size = 0, value_size = 0; + DBHistogram hist; + + auto start = coarse_mono_clock::now(); + + KeyValueDB::WholeSpaceIterator iter = db->get_wholespace_iterator(); + iter->seek_to_first(); + while (iter->valid()) { + dout(30) << __func__ << " Key: " << iter->key() << dendl; + key_size = iter->key_size(); + value_size = iter->value_size(); + hist.value_hist[hist.get_value_slab(value_size)]++; + max_key_size = std::max(max_key_size, key_size); + max_value_size = std::max(max_value_size, value_size); + total_key_size += key_size; + total_value_size += value_size; + + pair<string,string> key(iter->raw_key()); + + if (key.first == PREFIX_SUPER) { + hist.update_hist_entry(hist.key_hist, PREFIX_SUPER, key_size, value_size); + num_super++; + } else if (key.first == PREFIX_STAT) { + hist.update_hist_entry(hist.key_hist, PREFIX_STAT, key_size, value_size); + num_stat++; + } else if (key.first == PREFIX_COLL) { + hist.update_hist_entry(hist.key_hist, PREFIX_COLL, key_size, value_size); + num_coll++; + } else if (key.first == PREFIX_OBJ) { + if (key.second.back() == ONODE_KEY_SUFFIX) { + hist.update_hist_entry(hist.key_hist, prefix_onode, key_size, value_size); + num_onodes++; + } else { + hist.update_hist_entry(hist.key_hist, prefix_onode_shard, key_size, value_size); + num_shards++; + } + } else if (key.first == PREFIX_OMAP) { + hist.update_hist_entry(hist.key_hist, PREFIX_OMAP, key_size, value_size); + num_omap++; + } else if (key.first == PREFIX_PERPOOL_OMAP) { + hist.update_hist_entry(hist.key_hist, PREFIX_PERPOOL_OMAP, key_size, value_size); + num_omap++; + } else if (key.first == PREFIX_PERPG_OMAP) { + hist.update_hist_entry(hist.key_hist, PREFIX_PERPG_OMAP, key_size, value_size); + num_omap++; + } else if (key.first == PREFIX_PGMETA_OMAP) { + hist.update_hist_entry(hist.key_hist, PREFIX_PGMETA_OMAP, key_size, value_size); + num_pgmeta_omap++; + } else if (key.first == PREFIX_DEFERRED) { + hist.update_hist_entry(hist.key_hist, PREFIX_DEFERRED, key_size, value_size); + num_deferred++; + } else if (key.first == PREFIX_ALLOC || key.first == PREFIX_ALLOC_BITMAP) { + hist.update_hist_entry(hist.key_hist, PREFIX_ALLOC, key_size, value_size); + num_alloc++; + } else if (key.first == PREFIX_SHARED_BLOB) { + hist.update_hist_entry(hist.key_hist, PREFIX_SHARED_BLOB, key_size, value_size); + num_shared_shards++; + } else { + hist.update_hist_entry(hist.key_hist, prefix_other, key_size, value_size); + num_others++; + } + iter->next(); + } + + ceph::timespan duration = coarse_mono_clock::now() - start; + f->open_object_section("rocksdb_key_value_stats"); + f->dump_unsigned("num_onodes", num_onodes); + f->dump_unsigned("num_shards", num_shards); + f->dump_unsigned("num_super", num_super); + f->dump_unsigned("num_coll", num_coll); + f->dump_unsigned("num_omap", num_omap); + f->dump_unsigned("num_pgmeta_omap", num_pgmeta_omap); + f->dump_unsigned("num_deferred", num_deferred); + f->dump_unsigned("num_alloc", num_alloc); + f->dump_unsigned("num_stat", num_stat); + f->dump_unsigned("num_shared_shards", num_shared_shards); + f->dump_unsigned("num_others", num_others); + f->dump_unsigned("max_key_size", max_key_size); + f->dump_unsigned("max_value_size", max_value_size); + f->dump_unsigned("total_key_size", total_key_size); + f->dump_unsigned("total_value_size", total_value_size); + f->close_section(); + + hist.dump(f); + + dout(20) << __func__ << " finished in " << duration << " seconds" << dendl; + +} + +void BlueStore::_shutdown_cache() +{ + dout(10) << __func__ << dendl; + for (auto i : buffer_cache_shards) { + i->flush(); + ceph_assert(i->empty()); + } + for (auto& p : coll_map) { + p.second->onode_map.clear(); + if (!p.second->shared_blob_set.empty()) { + derr << __func__ << " stray shared blobs on " << p.first << dendl; + p.second->shared_blob_set.dump<0>(cct); + } + ceph_assert(p.second->onode_map.empty()); + ceph_assert(p.second->shared_blob_set.empty()); + } + coll_map.clear(); + for (auto i : onode_cache_shards) { + ceph_assert(i->empty()); + } +} + +// For external caller. +// We use a best-effort policy instead, e.g., +// we don't care if there are still some pinned onodes/data in the cache +// after this command is completed. +int BlueStore::flush_cache(ostream *os) +{ + dout(10) << __func__ << dendl; + for (auto i : onode_cache_shards) { + i->flush(); + } + for (auto i : buffer_cache_shards) { + i->flush(); + } + + return 0; +} + +void BlueStore::_apply_padding(uint64_t head_pad, + uint64_t tail_pad, + bufferlist& padded) +{ + if (head_pad) { + padded.prepend_zero(head_pad); + } + if (tail_pad) { + padded.append_zero(tail_pad); + } + if (head_pad || tail_pad) { + dout(20) << __func__ << " can pad head 0x" << std::hex << head_pad + << " tail 0x" << tail_pad << std::dec << dendl; + logger->inc(l_bluestore_write_pad_bytes, head_pad + tail_pad); + } +} + +void BlueStore::_record_onode(OnodeRef &o, KeyValueDB::Transaction &txn) +{ + // finalize extent_map shards + o->extent_map.update(txn, false); + if (o->extent_map.needs_reshard()) { + o->extent_map.reshard(db, txn); + o->extent_map.update(txn, true); + if (o->extent_map.needs_reshard()) { + dout(20) << __func__ << " warning: still wants reshard, check options?" + << dendl; + o->extent_map.clear_needs_reshard(); + } + logger->inc(l_bluestore_onode_reshard); + } + + // bound encode + size_t bound = 0; + denc(o->onode, bound); + o->extent_map.bound_encode_spanning_blobs(bound); + if (o->onode.extent_map_shards.empty()) { + denc(o->extent_map.inline_bl, bound); + } + + // encode + bufferlist bl; + unsigned onode_part, blob_part, extent_part; + { + auto p = bl.get_contiguous_appender(bound, true); + denc(o->onode, p); + onode_part = p.get_logical_offset(); + o->extent_map.encode_spanning_blobs(p); + blob_part = p.get_logical_offset() - onode_part; + if (o->onode.extent_map_shards.empty()) { + denc(o->extent_map.inline_bl, p); + } + extent_part = p.get_logical_offset() - onode_part - blob_part; + } + + dout(20) << __func__ << " onode " << o->oid << " is " << bl.length() + << " (" << onode_part << " bytes onode + " + << blob_part << " bytes spanning blobs + " + << extent_part << " bytes inline extents)" + << dendl; + + + txn->set(PREFIX_OBJ, o->key.c_str(), o->key.size(), bl); +} + +void BlueStore::_log_alerts(osd_alert_list_t& alerts) +{ + std::lock_guard l(qlock); + + if (!spurious_read_errors_alert.empty() && + cct->_conf->bluestore_warn_on_spurious_read_errors) { + alerts.emplace( + "BLUESTORE_SPURIOUS_READ_ERRORS", + spurious_read_errors_alert); + } + if (!disk_size_mismatch_alert.empty()) { + alerts.emplace( + "BLUESTORE_DISK_SIZE_MISMATCH", + disk_size_mismatch_alert); + } + if (!legacy_statfs_alert.empty()) { + alerts.emplace( + "BLUESTORE_LEGACY_STATFS", + legacy_statfs_alert); + } + if (!spillover_alert.empty() && + cct->_conf->bluestore_warn_on_bluefs_spillover) { + alerts.emplace( + "BLUEFS_SPILLOVER", + spillover_alert); + } + if (!no_per_pg_omap_alert.empty()) { + alerts.emplace( + "BLUESTORE_NO_PER_PG_OMAP", + no_per_pg_omap_alert); + } + if (!no_per_pool_omap_alert.empty()) { + alerts.emplace( + "BLUESTORE_NO_PER_POOL_OMAP", + no_per_pool_omap_alert); + } + string s0(failed_cmode); + + if (!failed_compressors.empty()) { + if (!s0.empty()) { + s0 += ", "; + } + s0 += "unable to load:"; + bool first = true; + for (auto& s : failed_compressors) { + if (first) { + first = false; + } else { + s0 += ", "; + } + s0 += s; + } + alerts.emplace( + "BLUESTORE_NO_COMPRESSION", + s0); + } +} + +void BlueStore::_collect_allocation_stats(uint64_t need, uint32_t alloc_size, + size_t extents) +{ + alloc_stats_count++; + alloc_stats_fragments += extents; + alloc_stats_size += need; +} + +void BlueStore::_record_allocation_stats() +{ + // don't care about data consistency, + // fields can be partially modified while making the tuple + auto t0 = std::make_tuple( + alloc_stats_count.exchange(0), + alloc_stats_fragments.exchange(0), + alloc_stats_size.exchange(0)); + + dout(0) << " allocation stats probe " + << probe_count << ":" + << " cnt: " << std::get<0>(t0) + << " frags: " << std::get<1>(t0) + << " size: " << std::get<2>(t0) + << dendl; + + + // + // Keep the history for probes from the power-of-two sequence: + // -1, -2, -4, -8, -16 + // + size_t base = 1; + for (auto& t : alloc_stats_history) { + dout(0) << " probe -" + << base + (probe_count % base) << ": " + << std::get<0>(t) + << ", " << std::get<1>(t) + << ", " << std::get<2>(t) + << dendl; + base <<= 1; + } + dout(0) << "------------" << dendl; + + ++ probe_count; + + for (ssize_t i = alloc_stats_history.size() - 1 ; i > 0 ; --i) { + if ((probe_count % (1 << i)) == 0) { + alloc_stats_history[i] = alloc_stats_history[i - 1]; + } + } + alloc_stats_history[0].swap(t0); +} + +// =========================================== +// BlueStoreRepairer + +size_t BlueStoreRepairer::StoreSpaceTracker::filter_out( + const interval_set<uint64_t>& extents) +{ + ceph_assert(granularity); // initialized + // can't call for the second time + ceph_assert(!was_filtered_out); + ceph_assert(collections_bfs.size() == objects_bfs.size()); + + uint64_t prev_pos = 0; + uint64_t npos = collections_bfs.size(); + + bloom_vector collections_reduced; + bloom_vector objects_reduced; + + for (auto e : extents) { + if (e.second == 0) { + continue; + } + uint64_t pos = max(e.first / granularity, prev_pos); + uint64_t end_pos = 1 + (e.first + e.second - 1) / granularity; + while (pos != npos && pos < end_pos) { + ceph_assert( collections_bfs[pos].element_count() == + objects_bfs[pos].element_count()); + if (collections_bfs[pos].element_count()) { + collections_reduced.push_back(std::move(collections_bfs[pos])); + objects_reduced.push_back(std::move(objects_bfs[pos])); + } + ++pos; + } + prev_pos = end_pos; + } + collections_reduced.swap(collections_bfs); + objects_reduced.swap(objects_bfs); + was_filtered_out = true; + return collections_bfs.size(); +} + +bool BlueStoreRepairer::remove_key(KeyValueDB *db, + const string& prefix, + const string& key) +{ + std::lock_guard l(lock); + if (!remove_key_txn) { + remove_key_txn = db->get_transaction(); + } + ++to_repair_cnt; + remove_key_txn->rmkey(prefix, key); + + return true; +} + +void BlueStoreRepairer::fix_per_pool_omap(KeyValueDB *db, int val) +{ + std::lock_guard l(lock); // possibly redundant + ceph_assert(fix_per_pool_omap_txn == nullptr); + fix_per_pool_omap_txn = db->get_transaction(); + ++to_repair_cnt; + bufferlist bl; + bl.append(stringify(val)); + fix_per_pool_omap_txn->set(PREFIX_SUPER, "per_pool_omap", bl); +} + +bool BlueStoreRepairer::fix_shared_blob( + KeyValueDB::Transaction txn, + uint64_t sbid, + bluestore_extent_ref_map_t* ref_map, + size_t repaired) +{ + string key; + get_shared_blob_key(sbid, &key); + if (ref_map) { + bluestore_shared_blob_t persistent(sbid, std::move(*ref_map)); + bufferlist bl; + encode(persistent, bl); + txn->set(PREFIX_SHARED_BLOB, key, bl); + } else { + txn->rmkey(PREFIX_SHARED_BLOB, key); + } + to_repair_cnt += repaired; + return true; +} + +bool BlueStoreRepairer::fix_statfs(KeyValueDB *db, + const string& key, + const store_statfs_t& new_statfs) +{ + std::lock_guard l(lock); + if (!fix_statfs_txn) { + fix_statfs_txn = db->get_transaction(); + } + BlueStore::volatile_statfs vstatfs; + vstatfs = new_statfs; + bufferlist bl; + vstatfs.encode(bl); + ++to_repair_cnt; + fix_statfs_txn->set(PREFIX_STAT, key, bl); + return true; +} + +bool BlueStoreRepairer::fix_leaked(KeyValueDB *db, + FreelistManager* fm, + uint64_t offset, uint64_t len) +{ + std::lock_guard l(lock); + if (!fix_fm_leaked_txn) { + fix_fm_leaked_txn = db->get_transaction(); + } + ++to_repair_cnt; + fm->release(offset, len, fix_fm_leaked_txn); + return true; +} +bool BlueStoreRepairer::fix_false_free(KeyValueDB *db, + FreelistManager* fm, + uint64_t offset, uint64_t len) +{ + std::lock_guard l(lock); + if (!fix_fm_false_free_txn) { + fix_fm_false_free_txn = db->get_transaction(); + } + ++to_repair_cnt; + fm->allocate(offset, len, fix_fm_false_free_txn); + return true; +} + +bool BlueStoreRepairer::fix_spanning_blobs( + KeyValueDB* db, + std::function<void(KeyValueDB::Transaction)> f) +{ + std::lock_guard l(lock); + if (!fix_onode_txn) { + fix_onode_txn = db->get_transaction(); + } + f(fix_onode_txn); + ++to_repair_cnt; + return true; +} + +bool BlueStoreRepairer::preprocess_misreference(KeyValueDB *db) +{ + //NB: not for use in multithreading mode!!! + if (misreferenced_extents.size()) { + size_t n = space_usage_tracker.filter_out(misreferenced_extents); + ceph_assert(n > 0); + if (!fix_misreferences_txn) { + fix_misreferences_txn = db->get_transaction(); + } + return true; + } + return false; +} + +unsigned BlueStoreRepairer::apply(KeyValueDB* db) +{ + //NB: not for use in multithreading mode!!! + if (fix_per_pool_omap_txn) { + db->submit_transaction_sync(fix_per_pool_omap_txn); + fix_per_pool_omap_txn = nullptr; + } + if (fix_fm_leaked_txn) { + db->submit_transaction_sync(fix_fm_leaked_txn); + fix_fm_leaked_txn = nullptr; + } + if (fix_fm_false_free_txn) { + db->submit_transaction_sync(fix_fm_false_free_txn); + fix_fm_false_free_txn = nullptr; + } + if (remove_key_txn) { + db->submit_transaction_sync(remove_key_txn); + remove_key_txn = nullptr; + } + if (fix_misreferences_txn) { + db->submit_transaction_sync(fix_misreferences_txn); + fix_misreferences_txn = nullptr; + } + if (fix_onode_txn) { + db->submit_transaction_sync(fix_onode_txn); + fix_onode_txn = nullptr; + } + if (fix_shared_blob_txn) { + db->submit_transaction_sync(fix_shared_blob_txn); + fix_shared_blob_txn = nullptr; + } + + if (fix_statfs_txn) { + db->submit_transaction_sync(fix_statfs_txn); + fix_statfs_txn = nullptr; + } + if (need_compact) { + db->compact(); + need_compact = false; + } + unsigned repaired = to_repair_cnt; + to_repair_cnt = 0; + return repaired; +} + +// ======================================================= +// RocksDBBlueFSVolumeSelector + +uint8_t RocksDBBlueFSVolumeSelector::select_prefer_bdev(void* h) { + ceph_assert(h != nullptr); + uint64_t hint = reinterpret_cast<uint64_t>(h); + uint8_t res; + switch (hint) { + case LEVEL_SLOW: + res = BlueFS::BDEV_SLOW; + if (db_avail4slow > 0) { + // considering statically available db space vs. + // - observed maximums on DB dev for DB/WAL/UNSORTED data + // - observed maximum spillovers + uint64_t max_db_use = 0; // max db usage we potentially observed + max_db_use += per_level_per_dev_max.at(BlueFS::BDEV_DB, LEVEL_LOG - LEVEL_FIRST); + max_db_use += per_level_per_dev_max.at(BlueFS::BDEV_DB, LEVEL_WAL - LEVEL_FIRST); + max_db_use += per_level_per_dev_max.at(BlueFS::BDEV_DB, LEVEL_DB - LEVEL_FIRST); + // this could go to db hence using it in the estimation + max_db_use += per_level_per_dev_max.at(BlueFS::BDEV_SLOW, LEVEL_DB - LEVEL_FIRST); + + auto db_total = l_totals[LEVEL_DB - LEVEL_FIRST]; + uint64_t avail = min( + db_avail4slow, + max_db_use < db_total ? db_total - max_db_use : 0); + + // considering current DB dev usage for SLOW data + if (avail > per_level_per_dev_usage.at(BlueFS::BDEV_DB, LEVEL_SLOW - LEVEL_FIRST)) { + res = BlueFS::BDEV_DB; + } + } + break; + case LEVEL_LOG: + case LEVEL_WAL: + res = BlueFS::BDEV_WAL; + break; + case LEVEL_DB: + default: + res = BlueFS::BDEV_DB; + break; + } + return res; +} + +void RocksDBBlueFSVolumeSelector::get_paths(const std::string& base, paths& res) const +{ + auto db_size = l_totals[LEVEL_DB - LEVEL_FIRST]; + res.emplace_back(base, db_size); + auto slow_size = l_totals[LEVEL_SLOW - LEVEL_FIRST]; + if (slow_size == 0) { + slow_size = db_size; + } + res.emplace_back(base + ".slow", slow_size); +} + +void* RocksDBBlueFSVolumeSelector::get_hint_by_dir(std::string_view dirname) const { + uint8_t res = LEVEL_DB; + if (dirname.length() > 5) { + // the "db.slow" and "db.wal" directory names are hard-coded at + // match up with bluestore. the slow device is always the second + // one (when a dedicated block.db device is present and used at + // bdev 0). the wal device is always last. + if (boost::algorithm::ends_with(dirname, ".slow")) { + res = LEVEL_SLOW; + } + else if (boost::algorithm::ends_with(dirname, ".wal")) { + res = LEVEL_WAL; + } + } + return reinterpret_cast<void*>(res); +} + +void RocksDBBlueFSVolumeSelector::dump(ostream& sout) { + auto max_x = per_level_per_dev_usage.get_max_x(); + auto max_y = per_level_per_dev_usage.get_max_y(); + sout << "RocksDBBlueFSVolumeSelector: wal_total:" << l_totals[LEVEL_WAL - LEVEL_FIRST] + << ", db_total:" << l_totals[LEVEL_DB - LEVEL_FIRST] + << ", slow_total:" << l_totals[LEVEL_SLOW - LEVEL_FIRST] + << ", db_avail:" << db_avail4slow << std::endl + << "Usage matrix:" << std::endl; + constexpr std::array<const char*, 8> names{ { + "DEV/LEV", + "WAL", + "DB", + "SLOW", + "*", + "*", + "REAL", + "FILES", + } }; + const size_t width = 12; + for (size_t i = 0; i < names.size(); ++i) { + sout.setf(std::ios::left, std::ios::adjustfield); + sout.width(width); + sout << names[i]; + } + sout << std::endl; + for (size_t l = 0; l < max_y; l++) { + sout.setf(std::ios::left, std::ios::adjustfield); + sout.width(width); + switch (l + LEVEL_FIRST) { + case LEVEL_LOG: + sout << "LOG"; break; + case LEVEL_WAL: + sout << "WAL"; break; + case LEVEL_DB: + sout << "DB"; break; + case LEVEL_SLOW: + sout << "SLOW"; break; + case LEVEL_MAX: + sout << "TOTALS"; break; + } + for (size_t d = 0; d < max_x; d++) { + sout.setf(std::ios::left, std::ios::adjustfield); + sout.width(width); + sout << stringify(byte_u_t(per_level_per_dev_usage.at(d, l))); + } + sout.setf(std::ios::left, std::ios::adjustfield); + sout.width(width); + sout << stringify(per_level_files[l]) << std::endl; + } + ceph_assert(max_x == per_level_per_dev_max.get_max_x()); + ceph_assert(max_y == per_level_per_dev_max.get_max_y()); + sout << "MAXIMUMS:" << std::endl; + for (size_t l = 0; l < max_y; l++) { + sout.setf(std::ios::left, std::ios::adjustfield); + sout.width(width); + switch (l + LEVEL_FIRST) { + case LEVEL_LOG: + sout << "LOG"; break; + case LEVEL_WAL: + sout << "WAL"; break; + case LEVEL_DB: + sout << "DB"; break; + case LEVEL_SLOW: + sout << "SLOW"; break; + case LEVEL_MAX: + sout << "TOTALS"; break; + } + for (size_t d = 0; d < max_x - 1; d++) { + sout.setf(std::ios::left, std::ios::adjustfield); + sout.width(width); + sout << stringify(byte_u_t(per_level_per_dev_max.at(d, l))); + } + sout.setf(std::ios::left, std::ios::adjustfield); + sout.width(width); + sout << stringify(byte_u_t(per_level_per_dev_max.at(max_x - 1, l))); + if (l < max_y - 1) { + sout << std::endl; + } + } +} + +// ======================================================= +// ======================================================= diff --git a/src/os/bluestore/BlueStore.h b/src/os/bluestore/BlueStore.h new file mode 100644 index 000000000..58a718da8 --- /dev/null +++ b/src/os/bluestore/BlueStore.h @@ -0,0 +1,3932 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab +/* + * Ceph - scalable distributed file system + * + * Copyright (C) 2014 Red Hat + * + * This is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License version 2.1, as published by the Free Software + * Foundation. See file COPYING. + * + */ + +#ifndef CEPH_OSD_BLUESTORE_H +#define CEPH_OSD_BLUESTORE_H + +#include "acconfig.h" + +#include <unistd.h> + +#include <atomic> +#include <chrono> +#include <ratio> +#include <mutex> +#include <condition_variable> + +#include <boost/intrusive/list.hpp> +#include <boost/intrusive/unordered_set.hpp> +#include <boost/intrusive/set.hpp> +#include <boost/functional/hash.hpp> +#include <boost/dynamic_bitset.hpp> +#include <boost/circular_buffer.hpp> + +#include "include/cpp-btree/btree_set.h" + +#include "include/ceph_assert.h" +#include "include/interval_set.h" +#include "include/unordered_map.h" +#include "include/mempool.h" +#include "include/hash.h" +#include "common/bloom_filter.hpp" +#include "common/Finisher.h" +#include "common/ceph_mutex.h" +#include "common/Throttle.h" +#include "common/perf_counters.h" +#include "common/PriorityCache.h" +#include "compressor/Compressor.h" +#include "os/ObjectStore.h" + +#include "bluestore_types.h" +#include "BlueFS.h" +#include "common/EventTrace.h" + +#ifdef WITH_BLKIN +#include "common/zipkin_trace.h" +#endif + +class Allocator; +class FreelistManager; +class BlueStoreRepairer; + +//#define DEBUG_CACHE +//#define DEBUG_DEFERRED + + + +// constants for Buffer::optimize() +#define MAX_BUFFER_SLOP_RATIO_DEN 8 // so actually 1/N + + +enum { + l_bluestore_first = 732430, + l_bluestore_kv_flush_lat, + l_bluestore_kv_commit_lat, + l_bluestore_kv_sync_lat, + l_bluestore_kv_final_lat, + l_bluestore_state_prepare_lat, + l_bluestore_state_aio_wait_lat, + l_bluestore_state_io_done_lat, + l_bluestore_state_kv_queued_lat, + l_bluestore_state_kv_committing_lat, + l_bluestore_state_kv_done_lat, + l_bluestore_state_deferred_queued_lat, + l_bluestore_state_deferred_aio_wait_lat, + l_bluestore_state_deferred_cleanup_lat, + l_bluestore_state_finishing_lat, + l_bluestore_state_done_lat, + l_bluestore_throttle_lat, + l_bluestore_submit_lat, + l_bluestore_commit_lat, + l_bluestore_read_lat, + l_bluestore_read_onode_meta_lat, + l_bluestore_read_wait_aio_lat, + l_bluestore_compress_lat, + l_bluestore_decompress_lat, + l_bluestore_csum_lat, + l_bluestore_compress_success_count, + l_bluestore_compress_rejected_count, + l_bluestore_write_pad_bytes, + l_bluestore_deferred_write_ops, + l_bluestore_deferred_write_bytes, + l_bluestore_write_penalty_read_ops, + l_bluestore_allocated, + l_bluestore_stored, + l_bluestore_compressed, + l_bluestore_compressed_allocated, + l_bluestore_compressed_original, + l_bluestore_onodes, + l_bluestore_pinned_onodes, + l_bluestore_onode_hits, + l_bluestore_onode_misses, + l_bluestore_onode_shard_hits, + l_bluestore_onode_shard_misses, + l_bluestore_extents, + l_bluestore_blobs, + l_bluestore_buffers, + l_bluestore_buffer_bytes, + l_bluestore_buffer_hit_bytes, + l_bluestore_buffer_miss_bytes, + l_bluestore_write_big, + l_bluestore_write_big_bytes, + l_bluestore_write_big_blobs, + l_bluestore_write_big_deferred, + l_bluestore_write_small, + l_bluestore_write_small_bytes, + l_bluestore_write_small_unused, + l_bluestore_write_deferred, + l_bluestore_write_deferred_bytes, + l_bluestore_write_small_pre_read, + l_bluestore_write_new, + l_bluestore_txc, + l_bluestore_onode_reshard, + l_bluestore_blob_split, + l_bluestore_extent_compress, + l_bluestore_gc_merged, + l_bluestore_read_eio, + l_bluestore_reads_with_retries, + l_bluestore_fragmentation, + l_bluestore_omap_seek_to_first_lat, + l_bluestore_omap_upper_bound_lat, + l_bluestore_omap_lower_bound_lat, + l_bluestore_omap_next_lat, + l_bluestore_omap_get_keys_lat, + l_bluestore_omap_get_values_lat, + l_bluestore_clist_lat, + l_bluestore_remove_lat, + l_bluestore_last +}; + +#define META_POOL_ID ((uint64_t)-1ull) + +class BlueStore : public ObjectStore, + public md_config_obs_t { + // ----------------------------------------------------- + // types +public: + // config observer + const char** get_tracked_conf_keys() const override; + void handle_conf_change(const ConfigProxy& conf, + const std::set<std::string> &changed) override; + + //handler for discard event + void handle_discard(interval_set<uint64_t>& to_release); + + void _set_csum(); + void _set_compression(); + void _set_throttle_params(); + int _set_cache_sizes(); + void _set_max_defer_interval() { + max_defer_interval = + cct->_conf.get_val<double>("bluestore_max_defer_interval"); + } + + struct TransContext; + + typedef std::map<uint64_t, ceph::buffer::list> ready_regions_t; + + + struct BufferSpace; + struct Collection; + typedef boost::intrusive_ptr<Collection> CollectionRef; + + struct AioContext { + virtual void aio_finish(BlueStore *store) = 0; + virtual ~AioContext() {} + }; + + /// cached buffer + struct Buffer { + MEMPOOL_CLASS_HELPERS(); + + enum { + STATE_EMPTY, ///< empty buffer -- used for cache history + STATE_CLEAN, ///< clean data that is up to date + STATE_WRITING, ///< data that is being written (io not yet complete) + }; + static const char *get_state_name(int s) { + switch (s) { + case STATE_EMPTY: return "empty"; + case STATE_CLEAN: return "clean"; + case STATE_WRITING: return "writing"; + default: return "???"; + } + } + enum { + FLAG_NOCACHE = 1, ///< trim when done WRITING (do not become CLEAN) + // NOTE: fix operator<< when you define a second flag + }; + static const char *get_flag_name(int s) { + switch (s) { + case FLAG_NOCACHE: return "nocache"; + default: return "???"; + } + } + + BufferSpace *space; + uint16_t state; ///< STATE_* + uint16_t cache_private = 0; ///< opaque (to us) value used by Cache impl + uint32_t flags; ///< FLAG_* + uint64_t seq; + uint32_t offset, length; + ceph::buffer::list data; + + boost::intrusive::list_member_hook<> lru_item; + boost::intrusive::list_member_hook<> state_item; + + Buffer(BufferSpace *space, unsigned s, uint64_t q, uint32_t o, uint32_t l, + unsigned f = 0) + : space(space), state(s), flags(f), seq(q), offset(o), length(l) {} + Buffer(BufferSpace *space, unsigned s, uint64_t q, uint32_t o, ceph::buffer::list& b, + unsigned f = 0) + : space(space), state(s), flags(f), seq(q), offset(o), + length(b.length()), data(b) {} + + bool is_empty() const { + return state == STATE_EMPTY; + } + bool is_clean() const { + return state == STATE_CLEAN; + } + bool is_writing() const { + return state == STATE_WRITING; + } + + uint32_t end() const { + return offset + length; + } + + void truncate(uint32_t newlen) { + ceph_assert(newlen < length); + if (data.length()) { + ceph::buffer::list t; + t.substr_of(data, 0, newlen); + data = std::move(t); + } + length = newlen; + } + void maybe_rebuild() { + if (data.length() && + (data.get_num_buffers() > 1 || + data.front().wasted() > data.length() / MAX_BUFFER_SLOP_RATIO_DEN)) { + data.rebuild(); + } + } + + void dump(ceph::Formatter *f) const { + f->dump_string("state", get_state_name(state)); + f->dump_unsigned("seq", seq); + f->dump_unsigned("offset", offset); + f->dump_unsigned("length", length); + f->dump_unsigned("data_length", data.length()); + } + }; + + struct BufferCacheShard; + + /// map logical extent range (object) onto buffers + struct BufferSpace { + enum { + BYPASS_CLEAN_CACHE = 0x1, // bypass clean cache + }; + + typedef boost::intrusive::list< + Buffer, + boost::intrusive::member_hook< + Buffer, + boost::intrusive::list_member_hook<>, + &Buffer::state_item> > state_list_t; + + mempool::bluestore_cache_meta::map<uint32_t, std::unique_ptr<Buffer>> + buffer_map; + + // we use a bare intrusive list here instead of std::map because + // it uses less memory and we expect this to be very small (very + // few IOs in flight to the same Blob at the same time). + state_list_t writing; ///< writing buffers, sorted by seq, ascending + + ~BufferSpace() { + ceph_assert(buffer_map.empty()); + ceph_assert(writing.empty()); + } + + void _add_buffer(BufferCacheShard* cache, Buffer* b, int level, Buffer* near) { + cache->_audit("_add_buffer start"); + buffer_map[b->offset].reset(b); + if (b->is_writing()) { + // we might get already cached data for which resetting mempool is inppropriate + // hence calling try_assign_to_mempool + b->data.try_assign_to_mempool(mempool::mempool_bluestore_writing); + if (writing.empty() || writing.rbegin()->seq <= b->seq) { + writing.push_back(*b); + } else { + auto it = writing.begin(); + while (it->seq < b->seq) { + ++it; + } + + ceph_assert(it->seq >= b->seq); + // note that this will insert b before it + // hence the order is maintained + writing.insert(it, *b); + } + } else { + b->data.reassign_to_mempool(mempool::mempool_bluestore_cache_data); + cache->_add(b, level, near); + } + cache->_audit("_add_buffer end"); + } + void _rm_buffer(BufferCacheShard* cache, Buffer *b) { + _rm_buffer(cache, buffer_map.find(b->offset)); + } + void _rm_buffer(BufferCacheShard* cache, + std::map<uint32_t, std::unique_ptr<Buffer>>::iterator p) { + ceph_assert(p != buffer_map.end()); + cache->_audit("_rm_buffer start"); + if (p->second->is_writing()) { + writing.erase(writing.iterator_to(*p->second)); + } else { + cache->_rm(p->second.get()); + } + buffer_map.erase(p); + cache->_audit("_rm_buffer end"); + } + + std::map<uint32_t,std::unique_ptr<Buffer>>::iterator _data_lower_bound( + uint32_t offset) { + auto i = buffer_map.lower_bound(offset); + if (i != buffer_map.begin()) { + --i; + if (i->first + i->second->length <= offset) + ++i; + } + return i; + } + + // must be called under protection of the Cache lock + void _clear(BufferCacheShard* cache); + + // return value is the highest cache_private of a trimmed buffer, or 0. + int discard(BufferCacheShard* cache, uint32_t offset, uint32_t length) { + std::lock_guard l(cache->lock); + int ret = _discard(cache, offset, length); + cache->_trim(); + return ret; + } + int _discard(BufferCacheShard* cache, uint32_t offset, uint32_t length); + + void write(BufferCacheShard* cache, uint64_t seq, uint32_t offset, ceph::buffer::list& bl, + unsigned flags) { + std::lock_guard l(cache->lock); + Buffer *b = new Buffer(this, Buffer::STATE_WRITING, seq, offset, bl, + flags); + b->cache_private = _discard(cache, offset, bl.length()); + _add_buffer(cache, b, (flags & Buffer::FLAG_NOCACHE) ? 0 : 1, nullptr); + cache->_trim(); + } + void _finish_write(BufferCacheShard* cache, uint64_t seq); + void did_read(BufferCacheShard* cache, uint32_t offset, ceph::buffer::list& bl) { + std::lock_guard l(cache->lock); + Buffer *b = new Buffer(this, Buffer::STATE_CLEAN, 0, offset, bl); + b->cache_private = _discard(cache, offset, bl.length()); + _add_buffer(cache, b, 1, nullptr); + cache->_trim(); + } + + void read(BufferCacheShard* cache, uint32_t offset, uint32_t length, + BlueStore::ready_regions_t& res, + interval_set<uint32_t>& res_intervals, + int flags = 0); + + void truncate(BufferCacheShard* cache, uint32_t offset) { + discard(cache, offset, (uint32_t)-1 - offset); + } + + void split(BufferCacheShard* cache, size_t pos, BufferSpace &r); + + void dump(BufferCacheShard* cache, ceph::Formatter *f) const { + std::lock_guard l(cache->lock); + f->open_array_section("buffers"); + for (auto& i : buffer_map) { + f->open_object_section("buffer"); + ceph_assert(i.first == i.second->offset); + i.second->dump(f); + f->close_section(); + } + f->close_section(); + } + }; + + struct SharedBlobSet; + + /// in-memory shared blob state (incl cached buffers) + struct SharedBlob { + MEMPOOL_CLASS_HELPERS(); + + std::atomic_int nref = {0}; ///< reference count + bool loaded = false; + + CollectionRef coll; + union { + uint64_t sbid_unloaded; ///< sbid if persistent isn't loaded + bluestore_shared_blob_t *persistent; ///< persistent part of the shared blob if any + }; + BufferSpace bc; ///< buffer cache + + SharedBlob(Collection *_coll) : coll(_coll), sbid_unloaded(0) { + if (get_cache()) { + get_cache()->add_blob(); + } + } + SharedBlob(uint64_t i, Collection *_coll); + ~SharedBlob(); + + uint64_t get_sbid() const { + return loaded ? persistent->sbid : sbid_unloaded; + } + + friend void intrusive_ptr_add_ref(SharedBlob *b) { b->get(); } + friend void intrusive_ptr_release(SharedBlob *b) { b->put(); } + + void dump(ceph::Formatter* f) const; + friend std::ostream& operator<<(std::ostream& out, const SharedBlob& sb); + + void get() { + ++nref; + } + void put(); + + /// get logical references + void get_ref(uint64_t offset, uint32_t length); + + /// put logical references, and get back any released extents + void put_ref(uint64_t offset, uint32_t length, + PExtentVector *r, bool *unshare); + + void finish_write(uint64_t seq); + + friend bool operator==(const SharedBlob &l, const SharedBlob &r) { + return l.get_sbid() == r.get_sbid(); + } + inline BufferCacheShard* get_cache() { + return coll ? coll->cache : nullptr; + } + inline SharedBlobSet* get_parent() { + return coll ? &(coll->shared_blob_set) : nullptr; + } + inline bool is_loaded() const { + return loaded; + } + + }; + typedef boost::intrusive_ptr<SharedBlob> SharedBlobRef; + + /// a lookup table of SharedBlobs + struct SharedBlobSet { + /// protect lookup, insertion, removal + ceph::mutex lock = ceph::make_mutex("BlueStore::SharedBlobSet::lock"); + + // we use a bare pointer because we don't want to affect the ref + // count + mempool::bluestore_cache_meta::unordered_map<uint64_t,SharedBlob*> sb_map; + + SharedBlobRef lookup(uint64_t sbid) { + std::lock_guard l(lock); + auto p = sb_map.find(sbid); + if (p == sb_map.end() || + p->second->nref == 0) { + return nullptr; + } + return p->second; + } + + void add(Collection* coll, SharedBlob *sb) { + std::lock_guard l(lock); + sb_map[sb->get_sbid()] = sb; + sb->coll = coll; + } + + bool remove(SharedBlob *sb, bool verify_nref_is_zero=false) { + std::lock_guard l(lock); + ceph_assert(sb->get_parent() == this); + if (verify_nref_is_zero && sb->nref != 0) { + return false; + } + // only remove if it still points to us + auto p = sb_map.find(sb->get_sbid()); + if (p != sb_map.end() && + p->second == sb) { + sb_map.erase(p); + } + return true; + } + + bool empty() { + std::lock_guard l(lock); + return sb_map.empty(); + } + + template <int LogLevelV> + void dump(CephContext *cct); + }; + +//#define CACHE_BLOB_BL // not sure if this is a win yet or not... :/ + + /// in-memory blob metadata and associated cached buffers (if any) + struct Blob { + MEMPOOL_CLASS_HELPERS(); + + std::atomic_int nref = {0}; ///< reference count + int16_t id = -1; ///< id, for spanning blobs only, >= 0 + int16_t last_encoded_id = -1; ///< (ephemeral) used during encoding only + SharedBlobRef shared_blob; ///< shared blob state (if any) + + private: + mutable bluestore_blob_t blob; ///< decoded blob metadata +#ifdef CACHE_BLOB_BL + mutable ceph::buffer::list blob_bl; ///< cached encoded blob, blob is dirty if empty +#endif + /// refs from this shard. ephemeral if id<0, persisted if spanning. + bluestore_blob_use_tracker_t used_in_blob; + + public: + + friend void intrusive_ptr_add_ref(Blob *b) { b->get(); } + friend void intrusive_ptr_release(Blob *b) { b->put(); } + + void dump(ceph::Formatter* f) const; + friend std::ostream& operator<<(std::ostream& out, const Blob &b); + + const bluestore_blob_use_tracker_t& get_blob_use_tracker() const { + return used_in_blob; + } + bool is_referenced() const { + return used_in_blob.is_not_empty(); + } + uint32_t get_referenced_bytes() const { + return used_in_blob.get_referenced_bytes(); + } + + bool is_spanning() const { + return id >= 0; + } + + bool can_split() const { + std::lock_guard l(shared_blob->get_cache()->lock); + // splitting a BufferSpace writing list is too hard; don't try. + return shared_blob->bc.writing.empty() && + used_in_blob.can_split() && + get_blob().can_split(); + } + + bool can_split_at(uint32_t blob_offset) const { + return used_in_blob.can_split_at(blob_offset) && + get_blob().can_split_at(blob_offset); + } + + bool can_reuse_blob(uint32_t min_alloc_size, + uint32_t target_blob_size, + uint32_t b_offset, + uint32_t *length0); + + void dup(Blob& o) { + o.shared_blob = shared_blob; + o.blob = blob; +#ifdef CACHE_BLOB_BL + o.blob_bl = blob_bl; +#endif + } + + inline const bluestore_blob_t& get_blob() const { + return blob; + } + inline bluestore_blob_t& dirty_blob() { +#ifdef CACHE_BLOB_BL + blob_bl.clear(); +#endif + return blob; + } + + /// discard buffers for unallocated regions + void discard_unallocated(Collection *coll); + + /// get logical references + void get_ref(Collection *coll, uint32_t offset, uint32_t length); + /// put logical references, and get back any released extents + bool put_ref(Collection *coll, uint32_t offset, uint32_t length, + PExtentVector *r); + + /// split the blob + void split(Collection *coll, uint32_t blob_offset, Blob *o); + + void get() { + ++nref; + } + void put() { + if (--nref == 0) + delete this; + } + + +#ifdef CACHE_BLOB_BL + void _encode() const { + if (blob_bl.length() == 0 ) { + encode(blob, blob_bl); + } else { + ceph_assert(blob_bl.length()); + } + } + void bound_encode( + size_t& p, + bool include_ref_map) const { + _encode(); + p += blob_bl.length(); + if (include_ref_map) { + used_in_blob.bound_encode(p); + } + } + void encode( + ceph::buffer::list::contiguous_appender& p, + bool include_ref_map) const { + _encode(); + p.append(blob_bl); + if (include_ref_map) { + used_in_blob.encode(p); + } + } + void decode( + Collection */*coll*/, + ceph::buffer::ptr::const_iterator& p, + bool include_ref_map) { + const char *start = p.get_pos(); + denc(blob, p); + const char *end = p.get_pos(); + blob_bl.clear(); + blob_bl.append(start, end - start); + if (include_ref_map) { + used_in_blob.decode(p); + } + } +#else + void bound_encode( + size_t& p, + uint64_t struct_v, + uint64_t sbid, + bool include_ref_map) const { + denc(blob, p, struct_v); + if (blob.is_shared()) { + denc(sbid, p); + } + if (include_ref_map) { + used_in_blob.bound_encode(p); + } + } + void encode( + ceph::buffer::list::contiguous_appender& p, + uint64_t struct_v, + uint64_t sbid, + bool include_ref_map) const { + denc(blob, p, struct_v); + if (blob.is_shared()) { + denc(sbid, p); + } + if (include_ref_map) { + used_in_blob.encode(p); + } + } + void decode( + Collection *coll, + ceph::buffer::ptr::const_iterator& p, + uint64_t struct_v, + uint64_t* sbid, + bool include_ref_map); +#endif + }; + typedef boost::intrusive_ptr<Blob> BlobRef; + typedef mempool::bluestore_cache_meta::map<int,BlobRef> blob_map_t; + + /// a logical extent, pointing to (some portion of) a blob + typedef boost::intrusive::set_base_hook<boost::intrusive::optimize_size<true> > ExtentBase; //making an alias to avoid build warnings + struct Extent : public ExtentBase { + MEMPOOL_CLASS_HELPERS(); + + uint32_t logical_offset = 0; ///< logical offset + uint32_t blob_offset = 0; ///< blob offset + uint32_t length = 0; ///< length + BlobRef blob; ///< the blob with our data + + /// ctor for lookup only + explicit Extent(uint32_t lo) : ExtentBase(), logical_offset(lo) { } + /// ctor for delayed initialization (see decode_some()) + explicit Extent() : ExtentBase() { + } + /// ctor for general usage + Extent(uint32_t lo, uint32_t o, uint32_t l, BlobRef& b) + : ExtentBase(), + logical_offset(lo), blob_offset(o), length(l) { + assign_blob(b); + } + ~Extent() { + if (blob) { + blob->shared_blob->get_cache()->rm_extent(); + } + } + + void dump(ceph::Formatter* f) const; + + void assign_blob(const BlobRef& b) { + ceph_assert(!blob); + blob = b; + blob->shared_blob->get_cache()->add_extent(); + } + + // comparators for intrusive_set + friend bool operator<(const Extent &a, const Extent &b) { + return a.logical_offset < b.logical_offset; + } + friend bool operator>(const Extent &a, const Extent &b) { + return a.logical_offset > b.logical_offset; + } + friend bool operator==(const Extent &a, const Extent &b) { + return a.logical_offset == b.logical_offset; + } + + uint32_t blob_start() const { + return logical_offset - blob_offset; + } + + uint32_t blob_end() const { + return blob_start() + blob->get_blob().get_logical_length(); + } + + uint32_t logical_end() const { + return logical_offset + length; + } + + // return true if any piece of the blob is out of + // the given range [o, o + l]. + bool blob_escapes_range(uint32_t o, uint32_t l) const { + return blob_start() < o || blob_end() > o + l; + } + }; + typedef boost::intrusive::set<Extent> extent_map_t; + + + friend std::ostream& operator<<(std::ostream& out, const Extent& e); + + struct OldExtent { + boost::intrusive::list_member_hook<> old_extent_item; + Extent e; + PExtentVector r; + bool blob_empty; // flag to track the last removed extent that makes blob + // empty - required to update compression stat properly + OldExtent(uint32_t lo, uint32_t o, uint32_t l, BlobRef& b) + : e(lo, o, l, b), blob_empty(false) { + } + static OldExtent* create(CollectionRef c, + uint32_t lo, + uint32_t o, + uint32_t l, + BlobRef& b); + }; + typedef boost::intrusive::list< + OldExtent, + boost::intrusive::member_hook< + OldExtent, + boost::intrusive::list_member_hook<>, + &OldExtent::old_extent_item> > old_extent_map_t; + + struct Onode; + + /// a sharded extent map, mapping offsets to lextents to blobs + struct ExtentMap { + Onode *onode; + extent_map_t extent_map; ///< map of Extents to Blobs + blob_map_t spanning_blob_map; ///< blobs that span shards + typedef boost::intrusive_ptr<Onode> OnodeRef; + + struct Shard { + bluestore_onode_t::shard_info *shard_info = nullptr; + unsigned extents = 0; ///< count extents in this shard + bool loaded = false; ///< true if shard is loaded + bool dirty = false; ///< true if shard is dirty and needs reencoding + }; + mempool::bluestore_cache_meta::vector<Shard> shards; ///< shards + + ceph::buffer::list inline_bl; ///< cached encoded map, if unsharded; empty=>dirty + + uint32_t needs_reshard_begin = 0; + uint32_t needs_reshard_end = 0; + + void dup(BlueStore* b, TransContext*, CollectionRef&, OnodeRef&, OnodeRef&, + uint64_t&, uint64_t&, uint64_t&); + + bool needs_reshard() const { + return needs_reshard_end > needs_reshard_begin; + } + void clear_needs_reshard() { + needs_reshard_begin = needs_reshard_end = 0; + } + void request_reshard(uint32_t begin, uint32_t end) { + if (begin < needs_reshard_begin) { + needs_reshard_begin = begin; + } + if (end > needs_reshard_end) { + needs_reshard_end = end; + } + } + + struct DeleteDisposer { + void operator()(Extent *e) { delete e; } + }; + + ExtentMap(Onode *o); + ~ExtentMap() { + extent_map.clear_and_dispose(DeleteDisposer()); + } + + void clear() { + extent_map.clear_and_dispose(DeleteDisposer()); + shards.clear(); + inline_bl.clear(); + clear_needs_reshard(); + } + + void dump(ceph::Formatter* f) const; + + bool encode_some(uint32_t offset, uint32_t length, ceph::buffer::list& bl, + unsigned *pn); + unsigned decode_some(ceph::buffer::list& bl); + + void bound_encode_spanning_blobs(size_t& p); + void encode_spanning_blobs(ceph::buffer::list::contiguous_appender& p); + void decode_spanning_blobs(ceph::buffer::ptr::const_iterator& p); + + BlobRef get_spanning_blob(int id) { + auto p = spanning_blob_map.find(id); + ceph_assert(p != spanning_blob_map.end()); + return p->second; + } + + void update(KeyValueDB::Transaction t, bool force); + decltype(BlueStore::Blob::id) allocate_spanning_blob_id(); + void reshard( + KeyValueDB *db, + KeyValueDB::Transaction t); + + /// initialize Shards from the onode + void init_shards(bool loaded, bool dirty); + + /// return index of shard containing offset + /// or -1 if not found + int seek_shard(uint32_t offset) { + size_t end = shards.size(); + size_t mid, left = 0; + size_t right = end; // one passed the right end + + while (left < right) { + mid = left + (right - left) / 2; + if (offset >= shards[mid].shard_info->offset) { + size_t next = mid + 1; + if (next >= end || offset < shards[next].shard_info->offset) + return mid; + //continue to search forwards + left = next; + } else { + //continue to search backwards + right = mid; + } + } + + return -1; // not found + } + + /// check if a range spans a shard + bool spans_shard(uint32_t offset, uint32_t length) { + if (shards.empty()) { + return false; + } + int s = seek_shard(offset); + ceph_assert(s >= 0); + if (s == (int)shards.size() - 1) { + return false; // last shard + } + if (offset + length <= shards[s+1].shard_info->offset) { + return false; + } + return true; + } + + /// ensure that a range of the map is loaded + void fault_range(KeyValueDB *db, + uint32_t offset, uint32_t length); + + /// ensure a range of the map is marked dirty + void dirty_range(uint32_t offset, uint32_t length); + + /// for seek_lextent test + extent_map_t::iterator find(uint64_t offset); + + /// seek to the first lextent including or after offset + extent_map_t::iterator seek_lextent(uint64_t offset); + extent_map_t::const_iterator seek_lextent(uint64_t offset) const; + + /// add a new Extent + void add(uint32_t lo, uint32_t o, uint32_t l, BlobRef& b) { + extent_map.insert(*new Extent(lo, o, l, b)); + } + + /// remove (and delete) an Extent + void rm(extent_map_t::iterator p) { + extent_map.erase_and_dispose(p, DeleteDisposer()); + } + + bool has_any_lextents(uint64_t offset, uint64_t length); + + /// consolidate adjacent lextents in extent_map + int compress_extent_map(uint64_t offset, uint64_t length); + + /// punch a logical hole. add lextents to deref to target list. + void punch_hole(CollectionRef &c, + uint64_t offset, uint64_t length, + old_extent_map_t *old_extents); + + /// put new lextent into lextent_map overwriting existing ones if + /// any and update references accordingly + Extent *set_lextent(CollectionRef &c, + uint64_t logical_offset, + uint64_t offset, uint64_t length, + BlobRef b, + old_extent_map_t *old_extents); + + /// split a blob (and referring extents) + BlobRef split_blob(BlobRef lb, uint32_t blob_offset, uint32_t pos); + }; + + /// Compressed Blob Garbage collector + /* + The primary idea of the collector is to estimate a difference between + allocation units(AU) currently present for compressed blobs and new AUs + required to store that data uncompressed. + Estimation is performed for protrusive extents within a logical range + determined by a concatenation of old_extents collection and specific(current) + write request. + The root cause for old_extents use is the need to handle blob ref counts + properly. Old extents still hold blob refs and hence we need to traverse + the collection to determine if blob to be released. + Protrusive extents are extents that fit into the blob std::set in action + (ones that are below the logical range from above) but not removed totally + due to the current write. + E.g. for + extent1 <loffs = 100, boffs = 100, len = 100> -> + blob1<compressed, len_on_disk=4096, logical_len=8192> + extent2 <loffs = 200, boffs = 200, len = 100> -> + blob2<raw, len_on_disk=4096, llen=4096> + extent3 <loffs = 300, boffs = 300, len = 100> -> + blob1<compressed, len_on_disk=4096, llen=8192> + extent4 <loffs = 4096, boffs = 0, len = 100> -> + blob3<raw, len_on_disk=4096, llen=4096> + write(300~100) + protrusive extents are within the following ranges <0~300, 400~8192-400> + In this case existing AUs that might be removed due to GC (i.e. blob1) + use 2x4K bytes. + And new AUs expected after GC = 0 since extent1 to be merged into blob2. + Hence we should do a collect. + */ + class GarbageCollector + { + public: + /// return amount of allocation units that might be saved due to GC + int64_t estimate( + uint64_t offset, + uint64_t length, + const ExtentMap& extent_map, + const old_extent_map_t& old_extents, + uint64_t min_alloc_size); + + /// return a collection of extents to perform GC on + const interval_set<uint64_t>& get_extents_to_collect() const { + return extents_to_collect; + } + GarbageCollector(CephContext* _cct) : cct(_cct) {} + + private: + struct BlobInfo { + uint64_t referenced_bytes = 0; ///< amount of bytes referenced in blob + int64_t expected_allocations = 0; ///< new alloc units required + ///< in case of gc fulfilled + bool collect_candidate = false; ///< indicate if blob has any extents + ///< eligible for GC. + extent_map_t::const_iterator first_lextent; ///< points to the first + ///< lextent referring to + ///< the blob if any. + ///< collect_candidate flag + ///< determines the validity + extent_map_t::const_iterator last_lextent; ///< points to the last + ///< lextent referring to + ///< the blob if any. + + BlobInfo(uint64_t ref_bytes) : + referenced_bytes(ref_bytes) { + } + }; + CephContext* cct; + std::map<Blob*, BlobInfo> affected_blobs; ///< compressed blobs and their ref_map + ///< copies that are affected by the + ///< specific write + + ///< protrusive extents that should be collected if GC takes place + interval_set<uint64_t> extents_to_collect; + + boost::optional<uint64_t > used_alloc_unit; ///< last processed allocation + ///< unit when traversing + ///< protrusive extents. + ///< Other extents mapped to + ///< this AU to be ignored + ///< (except the case where + ///< uncompressed extent follows + ///< compressed one - see below). + BlobInfo* blob_info_counted = nullptr; ///< std::set if previous allocation unit + ///< caused expected_allocations + ///< counter increment at this blob. + ///< if uncompressed extent follows + ///< a decrement for the + ///< expected_allocations counter + ///< is needed + int64_t expected_allocations = 0; ///< new alloc units required in case + ///< of gc fulfilled + int64_t expected_for_release = 0; ///< alloc units currently used by + ///< compressed blobs that might + ///< gone after GC + + protected: + void process_protrusive_extents(const BlueStore::ExtentMap& extent_map, + uint64_t start_offset, + uint64_t end_offset, + uint64_t start_touch_offset, + uint64_t end_touch_offset, + uint64_t min_alloc_size); + }; + + struct OnodeSpace; + /// an in-memory object + struct Onode { + MEMPOOL_CLASS_HELPERS(); + + std::atomic_int nref; ///< reference count + std::atomic_int put_nref = {0}; + Collection *c; + ghobject_t oid; + + /// key under PREFIX_OBJ where we are stored + mempool::bluestore_cache_meta::string key; + + boost::intrusive::list_member_hook<> lru_item; + + bluestore_onode_t onode; ///< metadata stored as value in kv store + bool exists; ///< true if object logically exists + bool cached; ///< Onode is logically in the cache + /// (it can be pinned and hence physically out + /// of it at the moment though) + std::atomic_bool pinned; ///< Onode is pinned + /// (or should be pinned when cached) + ExtentMap extent_map; + + // track txc's that have not been committed to kv store (and whose + // effects cannot be read via the kvdb read methods) + std::atomic<int> flushing_count = {0}; + std::atomic<int> waiting_count = {0}; + /// protect flush_txns + ceph::mutex flush_lock = ceph::make_mutex("BlueStore::Onode::flush_lock"); + ceph::condition_variable flush_cond; ///< wait here for uncommitted txns + + Onode(Collection *c, const ghobject_t& o, + const mempool::bluestore_cache_meta::string& k) + : nref(0), + c(c), + oid(o), + key(k), + exists(false), + cached(false), + pinned(false), + extent_map(this) { + } + Onode(Collection* c, const ghobject_t& o, + const std::string& k) + : nref(0), + c(c), + oid(o), + key(k), + exists(false), + cached(false), + pinned(false), + extent_map(this) { + } + Onode(Collection* c, const ghobject_t& o, + const char* k) + : nref(0), + c(c), + oid(o), + key(k), + exists(false), + cached(false), + pinned(false), + extent_map(this) { + } + + static Onode* decode( + CollectionRef c, + const ghobject_t& oid, + const std::string& key, + const ceph::buffer::list& v); + + void dump(ceph::Formatter* f) const; + + void flush(); + void get(); + void put(); + + inline bool put_cache() { + ceph_assert(!cached); + cached = true; + return !pinned; + } + inline bool pop_cache() { + ceph_assert(cached); + cached = false; + return !pinned; + } + + static const std::string& calc_omap_prefix(uint8_t flags); + static void calc_omap_header(uint8_t flags, const Onode* o, + std::string* out); + static void calc_omap_key(uint8_t flags, const Onode* o, + const std::string& key, std::string* out); + static void calc_omap_tail(uint8_t flags, const Onode* o, + std::string* out); + + const std::string& get_omap_prefix() { + return calc_omap_prefix(onode.flags); + } + void get_omap_header(std::string* out) { + calc_omap_header(onode.flags, this, out); + } + void get_omap_key(const std::string& key, std::string* out) { + calc_omap_key(onode.flags, this, key, out); + } + void get_omap_tail(std::string* out) { + calc_omap_tail(onode.flags, this, out); + } + + void rewrite_omap_key(const std::string& old, std::string *out); + void decode_omap_key(const std::string& key, std::string *user_key); + + // Return the offset of an object on disk. This function is intended *only* + // for use with zoned storage devices because in these devices, the objects + // are laid out contiguously on disk, which is not the case in general. + // Also, it should always be called after calling extent_map.fault_range(), + // so that the extent map is loaded. + int64_t zoned_get_ondisk_starting_offset() const { + return extent_map.extent_map.begin()->blob-> + get_blob().calc_offset(0, nullptr); + } + }; + typedef boost::intrusive_ptr<Onode> OnodeRef; + + /// A generic Cache Shard + struct CacheShard { + CephContext *cct; + PerfCounters *logger; + + /// protect lru and other structures + ceph::recursive_mutex lock = { + ceph::make_recursive_mutex("BlueStore::CacheShard::lock") }; + + std::atomic<uint64_t> max = {0}; + std::atomic<uint64_t> num = {0}; + + CacheShard(CephContext* cct) : cct(cct), logger(nullptr) {} + virtual ~CacheShard() {} + + void set_max(uint64_t max_) { + max = max_; + } + + uint64_t _get_num() { + return num; + } + + virtual void _trim_to(uint64_t new_size) = 0; + void _trim() { + if (cct->_conf->objectstore_blackhole) { + // do not trim if we are throwing away IOs a layer down + return; + } + _trim_to(max); + } + + void trim() { + std::lock_guard l(lock); + _trim(); + } + void flush() { + std::lock_guard l(lock); + // we should not be shutting down after the blackhole is enabled + assert(!cct->_conf->objectstore_blackhole); + _trim_to(0); + } + +#ifdef DEBUG_CACHE + virtual void _audit(const char *s) = 0; +#else + void _audit(const char *s) { /* no-op */ } +#endif + }; + + /// A Generic onode Cache Shard + struct OnodeCacheShard : public CacheShard { + std::atomic<uint64_t> num_pinned = {0}; + + std::array<std::pair<ghobject_t, ceph::mono_clock::time_point>, 64> dumped_onodes; + + virtual void _pin(Onode* o) = 0; + virtual void _unpin(Onode* o) = 0; + + public: + OnodeCacheShard(CephContext* cct) : CacheShard(cct) {} + static OnodeCacheShard *create(CephContext* cct, std::string type, + PerfCounters *logger); + virtual void _add(Onode* o, int level) = 0; + virtual void _rm(Onode* o) = 0; + virtual void _unpin_and_rm(Onode* o) = 0; + + virtual void move_pinned(OnodeCacheShard *to, Onode *o) = 0; + virtual void add_stats(uint64_t *onodes, uint64_t *pinned_onodes) = 0; + bool empty() { + return _get_num() == 0; + } + }; + + /// A Generic buffer Cache Shard + struct BufferCacheShard : public CacheShard { + std::atomic<uint64_t> num_extents = {0}; + std::atomic<uint64_t> num_blobs = {0}; + uint64_t buffer_bytes = 0; + + public: + BufferCacheShard(CephContext* cct) : CacheShard(cct) {} + static BufferCacheShard *create(CephContext* cct, std::string type, + PerfCounters *logger); + virtual void _add(Buffer *b, int level, Buffer *near) = 0; + virtual void _rm(Buffer *b) = 0; + virtual void _move(BufferCacheShard *src, Buffer *b) = 0; + virtual void _touch(Buffer *b) = 0; + virtual void _adjust_size(Buffer *b, int64_t delta) = 0; + + uint64_t _get_bytes() { + return buffer_bytes; + } + + void add_extent() { + ++num_extents; + } + void rm_extent() { + --num_extents; + } + + void add_blob() { + ++num_blobs; + } + void rm_blob() { + --num_blobs; + } + + virtual void add_stats(uint64_t *extents, + uint64_t *blobs, + uint64_t *buffers, + uint64_t *bytes) = 0; + + bool empty() { + std::lock_guard l(lock); + return _get_bytes() == 0; + } + }; + + struct OnodeSpace { + OnodeCacheShard *cache; + + private: + /// forward lookups + mempool::bluestore_cache_meta::unordered_map<ghobject_t,OnodeRef> onode_map; + + friend struct Collection; // for split_cache() + friend struct Onode; // for put() + friend struct LruOnodeCacheShard; + void _remove(const ghobject_t& oid); + public: + OnodeSpace(OnodeCacheShard *c) : cache(c) {} + ~OnodeSpace() { + clear(); + } + + OnodeRef add(const ghobject_t& oid, OnodeRef& o); + OnodeRef lookup(const ghobject_t& o); + void rename(OnodeRef& o, const ghobject_t& old_oid, + const ghobject_t& new_oid, + const mempool::bluestore_cache_meta::string& new_okey); + void clear(); + bool empty(); + + template <int LogLevelV> + void dump(CephContext *cct); + + /// return true if f true for any item + bool map_any(std::function<bool(Onode*)> f); + }; + + class OpSequencer; + using OpSequencerRef = ceph::ref_t<OpSequencer>; + + struct Collection : public CollectionImpl { + BlueStore *store; + OpSequencerRef osr; + BufferCacheShard *cache; ///< our cache shard + bluestore_cnode_t cnode; + ceph::shared_mutex lock = + ceph::make_shared_mutex("BlueStore::Collection::lock", true, false); + + bool exists; + + SharedBlobSet shared_blob_set; ///< open SharedBlobs + + // cache onodes on a per-collection basis to avoid lock + // contention. + OnodeSpace onode_map; + + //pool options + pool_opts_t pool_opts; + ContextQueue *commit_queue; + + OnodeCacheShard* get_onode_cache() const { + return onode_map.cache; + } + OnodeRef get_onode(const ghobject_t& oid, bool create, bool is_createop=false); + + // the terminology is confusing here, sorry! + // + // blob_t shared_blob_t + // !shared unused -> open + // shared !loaded -> open + shared + // shared loaded -> open + shared + loaded + // + // i.e., + // open = SharedBlob is instantiated + // shared = blob_t shared flag is std::set; SharedBlob is hashed. + // loaded = SharedBlob::shared_blob_t is loaded from kv store + void open_shared_blob(uint64_t sbid, BlobRef b); + void load_shared_blob(SharedBlobRef sb); + void make_blob_shared(uint64_t sbid, BlobRef b); + uint64_t make_blob_unshared(SharedBlob *sb); + + BlobRef new_blob() { + BlobRef b = new Blob(); + b->shared_blob = new SharedBlob(this); + return b; + } + + bool contains(const ghobject_t& oid) { + if (cid.is_meta()) + return oid.hobj.pool == -1; + spg_t spgid; + if (cid.is_pg(&spgid)) + return + spgid.pgid.contains(cnode.bits, oid) && + oid.shard_id == spgid.shard; + return false; + } + + int64_t pool() const { + return cid.pool(); + } + + void split_cache(Collection *dest); + + bool flush_commit(Context *c) override; + void flush() override; + void flush_all_but_last(); + + Collection(BlueStore *ns, OnodeCacheShard *oc, BufferCacheShard *bc, coll_t c); + }; + + class OmapIteratorImpl : public ObjectMap::ObjectMapIteratorImpl { + CollectionRef c; + OnodeRef o; + KeyValueDB::Iterator it; + std::string head, tail; + + std::string _stringify() const; + + public: + OmapIteratorImpl(CollectionRef c, OnodeRef o, KeyValueDB::Iterator it); + int seek_to_first() override; + int upper_bound(const std::string &after) override; + int lower_bound(const std::string &to) override; + bool valid() override; + int next() override; + std::string key() override; + ceph::buffer::list value() override; + std::string tail_key() override { + return tail; + } + + int status() override { + return 0; + } + }; + + struct volatile_statfs{ + enum { + STATFS_ALLOCATED = 0, + STATFS_STORED, + STATFS_COMPRESSED_ORIGINAL, + STATFS_COMPRESSED, + STATFS_COMPRESSED_ALLOCATED, + STATFS_LAST + }; + int64_t values[STATFS_LAST]; + volatile_statfs() { + memset(this, 0, sizeof(volatile_statfs)); + } + void reset() { + *this = volatile_statfs(); + } + void publish(store_statfs_t* buf) const { + buf->allocated = allocated(); + buf->data_stored = stored(); + buf->data_compressed = compressed(); + buf->data_compressed_original = compressed_original(); + buf->data_compressed_allocated = compressed_allocated(); + } + + volatile_statfs& operator+=(const volatile_statfs& other) { + for (size_t i = 0; i < STATFS_LAST; ++i) { + values[i] += other.values[i]; + } + return *this; + } + int64_t& allocated() { + return values[STATFS_ALLOCATED]; + } + int64_t& stored() { + return values[STATFS_STORED]; + } + int64_t& compressed_original() { + return values[STATFS_COMPRESSED_ORIGINAL]; + } + int64_t& compressed() { + return values[STATFS_COMPRESSED]; + } + int64_t& compressed_allocated() { + return values[STATFS_COMPRESSED_ALLOCATED]; + } + int64_t allocated() const { + return values[STATFS_ALLOCATED]; + } + int64_t stored() const { + return values[STATFS_STORED]; + } + int64_t compressed_original() const { + return values[STATFS_COMPRESSED_ORIGINAL]; + } + int64_t compressed() const { + return values[STATFS_COMPRESSED]; + } + int64_t compressed_allocated() const { + return values[STATFS_COMPRESSED_ALLOCATED]; + } + volatile_statfs& operator=(const store_statfs_t& st) { + values[STATFS_ALLOCATED] = st.allocated; + values[STATFS_STORED] = st.data_stored; + values[STATFS_COMPRESSED_ORIGINAL] = st.data_compressed_original; + values[STATFS_COMPRESSED] = st.data_compressed; + values[STATFS_COMPRESSED_ALLOCATED] = st.data_compressed_allocated; + return *this; + } + bool is_empty() { + return values[STATFS_ALLOCATED] == 0 && + values[STATFS_STORED] == 0 && + values[STATFS_COMPRESSED] == 0 && + values[STATFS_COMPRESSED_ORIGINAL] == 0 && + values[STATFS_COMPRESSED_ALLOCATED] == 0; + } + void decode(ceph::buffer::list::const_iterator& it) { + using ceph::decode; + for (size_t i = 0; i < STATFS_LAST; i++) { + decode(values[i], it); + } + } + + void encode(ceph::buffer::list& bl) { + using ceph::encode; + for (size_t i = 0; i < STATFS_LAST; i++) { + encode(values[i], bl); + } + } + }; + + struct TransContext final : public AioContext { + MEMPOOL_CLASS_HELPERS(); + + typedef enum { + STATE_PREPARE, + STATE_AIO_WAIT, + STATE_IO_DONE, + STATE_KV_QUEUED, // queued for kv_sync_thread submission + STATE_KV_SUBMITTED, // submitted to kv; not yet synced + STATE_KV_DONE, + STATE_DEFERRED_QUEUED, // in deferred_queue (pending or running) + STATE_DEFERRED_CLEANUP, // remove deferred kv record + STATE_DEFERRED_DONE, + STATE_FINISHING, + STATE_DONE, + } state_t; + + const char *get_state_name() { + switch (state) { + case STATE_PREPARE: return "prepare"; + case STATE_AIO_WAIT: return "aio_wait"; + case STATE_IO_DONE: return "io_done"; + case STATE_KV_QUEUED: return "kv_queued"; + case STATE_KV_SUBMITTED: return "kv_submitted"; + case STATE_KV_DONE: return "kv_done"; + case STATE_DEFERRED_QUEUED: return "deferred_queued"; + case STATE_DEFERRED_CLEANUP: return "deferred_cleanup"; + case STATE_DEFERRED_DONE: return "deferred_done"; + case STATE_FINISHING: return "finishing"; + case STATE_DONE: return "done"; + } + return "???"; + } + +#if defined(WITH_LTTNG) + const char *get_state_latency_name(int state) { + switch (state) { + case l_bluestore_state_prepare_lat: return "prepare"; + case l_bluestore_state_aio_wait_lat: return "aio_wait"; + case l_bluestore_state_io_done_lat: return "io_done"; + case l_bluestore_state_kv_queued_lat: return "kv_queued"; + case l_bluestore_state_kv_committing_lat: return "kv_committing"; + case l_bluestore_state_kv_done_lat: return "kv_done"; + case l_bluestore_state_deferred_queued_lat: return "deferred_queued"; + case l_bluestore_state_deferred_cleanup_lat: return "deferred_cleanup"; + case l_bluestore_state_finishing_lat: return "finishing"; + case l_bluestore_state_done_lat: return "done"; + } + return "???"; + } +#endif + + inline void set_state(state_t s) { + state = s; +#ifdef WITH_BLKIN + if (trace) { + trace.event(get_state_name()); + } +#endif + } + inline state_t get_state() { + return state; + } + + CollectionRef ch; + OpSequencerRef osr; // this should be ch->osr + boost::intrusive::list_member_hook<> sequencer_item; + + uint64_t bytes = 0, ios = 0, cost = 0; + + std::set<OnodeRef> onodes; ///< these need to be updated/written + std::set<OnodeRef> modified_objects; ///< objects we modified (and need a ref) + + // A map from onode to a vector of object offset. For new objects created + // in the transaction we append the new offset to the vector, for + // overwritten objects we append the negative of the previous ondisk offset + // followed by the new offset, and for truncated objects we append the + // negative of the previous ondisk offset. We need to maintain a vector of + // offsets because *within the same transaction* an object may be truncated + // and then written again, or an object may be overwritten multiple times to + // different zones. See update_cleaning_metadata function for how this map + // is used. + std::map<OnodeRef, std::vector<int64_t>> zoned_onode_to_offset_map; + + std::set<SharedBlobRef> shared_blobs; ///< these need to be updated/written + std::set<SharedBlobRef> shared_blobs_written; ///< update these on io completion + + KeyValueDB::Transaction t; ///< then we will commit this + std::list<Context*> oncommits; ///< more commit completions + std::list<CollectionRef> removed_collections; ///< colls we removed + + boost::intrusive::list_member_hook<> deferred_queue_item; + bluestore_deferred_transaction_t *deferred_txn = nullptr; ///< if any + + interval_set<uint64_t> allocated, released; + volatile_statfs statfs_delta; ///< overall store statistics delta + uint64_t osd_pool_id = META_POOL_ID; ///< osd pool id we're operating on + + IOContext ioc; + bool had_ios = false; ///< true if we submitted IOs before our kv txn + + uint64_t seq = 0; + ceph::mono_clock::time_point start; + ceph::mono_clock::time_point last_stamp; + + uint64_t last_nid = 0; ///< if non-zero, highest new nid we allocated + uint64_t last_blobid = 0; ///< if non-zero, highest new blobid we allocated + +#if defined(WITH_LTTNG) + bool tracing = false; +#endif + +#ifdef WITH_BLKIN + ZTracer::Trace trace; +#endif + + explicit TransContext(CephContext* cct, Collection *c, OpSequencer *o, + std::list<Context*> *on_commits) + : ch(c), + osr(o), + ioc(cct, this), + start(ceph::mono_clock::now()) { + last_stamp = start; + if (on_commits) { + oncommits.swap(*on_commits); + } + } + ~TransContext() { +#ifdef WITH_BLKIN + if (trace) { + trace.event("txc destruct"); + } +#endif + delete deferred_txn; + } + + void write_onode(OnodeRef &o) { + onodes.insert(o); + } + void write_shared_blob(SharedBlobRef &sb) { + shared_blobs.insert(sb); + } + void unshare_blob(SharedBlob *sb) { + shared_blobs.erase(sb); + } + + /// note we logically modified object (when onode itself is unmodified) + void note_modified_object(OnodeRef &o) { + // onode itself isn't written, though + modified_objects.insert(o); + } + void note_removed_object(OnodeRef& o) { + modified_objects.insert(o); + onodes.erase(o); + } + + void zoned_note_new_object(OnodeRef &o) { + auto [_, ok] = zoned_onode_to_offset_map.emplace( + std::pair<OnodeRef, std::vector<int64_t>>(o, {o->zoned_get_ondisk_starting_offset()})); + ceph_assert(ok); + } + + void zoned_note_updated_object(OnodeRef &o, int64_t prev_offset) { + int64_t new_offset = o->zoned_get_ondisk_starting_offset(); + auto [it, ok] = zoned_onode_to_offset_map.emplace( + std::pair<OnodeRef, std::vector<int64_t>>(o, {-prev_offset, new_offset})); + if (!ok) { + it->second.push_back(-prev_offset); + it->second.push_back(new_offset); + } + } + + void zoned_note_truncated_object(OnodeRef &o, int64_t offset) { + auto [it, ok] = zoned_onode_to_offset_map.emplace( + std::pair<OnodeRef, std::vector<int64_t>>(o, {-offset})); + if (!ok) { + it->second.push_back(-offset); + } + } + + void aio_finish(BlueStore *store) override { + store->txc_aio_finish(this); + } + private: + state_t state = STATE_PREPARE; + }; + + class BlueStoreThrottle { +#if defined(WITH_LTTNG) + const std::chrono::time_point<ceph::mono_clock> time_base = ceph::mono_clock::now(); + + // Time of last chosen io (microseconds) + std::atomic<uint64_t> previous_emitted_tp_time_mono_mcs = {0}; + std::atomic<uint64_t> ios_started_since_last_traced = {0}; + std::atomic<uint64_t> ios_completed_since_last_traced = {0}; + + std::atomic_uint pending_kv_ios = {0}; + std::atomic_uint pending_deferred_ios = {0}; + + // Min period between trace points (microseconds) + std::atomic<uint64_t> trace_period_mcs = {0}; + + bool should_trace( + uint64_t *started, + uint64_t *completed) { + uint64_t min_period_mcs = trace_period_mcs.load( + std::memory_order_relaxed); + + if (min_period_mcs == 0) { + *started = 1; + *completed = ios_completed_since_last_traced.exchange(0); + return true; + } else { + ios_started_since_last_traced++; + auto now_mcs = ceph::to_microseconds<uint64_t>( + ceph::mono_clock::now() - time_base); + uint64_t previous_mcs = previous_emitted_tp_time_mono_mcs; + uint64_t period_mcs = now_mcs - previous_mcs; + if (period_mcs > min_period_mcs) { + if (previous_emitted_tp_time_mono_mcs.compare_exchange_strong( + previous_mcs, now_mcs)) { + // This would be racy at a sufficiently extreme trace rate, but isn't + // worth the overhead of doing it more carefully. + *started = ios_started_since_last_traced.exchange(0); + *completed = ios_completed_since_last_traced.exchange(0); + return true; + } + } + return false; + } + } +#endif + +#if defined(WITH_LTTNG) + void emit_initial_tracepoint( + KeyValueDB &db, + TransContext &txc, + ceph::mono_clock::time_point); +#else + void emit_initial_tracepoint( + KeyValueDB &db, + TransContext &txc, + ceph::mono_clock::time_point) {} +#endif + + Throttle throttle_bytes; ///< submit to commit + Throttle throttle_deferred_bytes; ///< submit to deferred complete + + public: + BlueStoreThrottle(CephContext *cct) : + throttle_bytes(cct, "bluestore_throttle_bytes", 0), + throttle_deferred_bytes(cct, "bluestore_throttle_deferred_bytes", 0) + { + reset_throttle(cct->_conf); + } + +#if defined(WITH_LTTNG) + void complete_kv(TransContext &txc); + void complete(TransContext &txc); +#else + void complete_kv(TransContext &txc) {} + void complete(TransContext &txc) {} +#endif + + ceph::mono_clock::duration log_state_latency( + TransContext &txc, PerfCounters *logger, int state); + bool try_start_transaction( + KeyValueDB &db, + TransContext &txc, + ceph::mono_clock::time_point); + void finish_start_transaction( + KeyValueDB &db, + TransContext &txc, + ceph::mono_clock::time_point); + void release_kv_throttle(uint64_t cost) { + throttle_bytes.put(cost); + } + void release_deferred_throttle(uint64_t cost) { + throttle_deferred_bytes.put(cost); + } + bool should_submit_deferred() { + return throttle_deferred_bytes.past_midpoint(); + } + void reset_throttle(const ConfigProxy &conf) { + throttle_bytes.reset_max(conf->bluestore_throttle_bytes); + throttle_deferred_bytes.reset_max( + conf->bluestore_throttle_bytes + + conf->bluestore_throttle_deferred_bytes); +#if defined(WITH_LTTNG) + double rate = conf.get_val<double>("bluestore_throttle_trace_rate"); + trace_period_mcs = rate > 0 ? floor((1/rate) * 1000000.0) : 0; +#endif + } + } throttle; + + typedef boost::intrusive::list< + TransContext, + boost::intrusive::member_hook< + TransContext, + boost::intrusive::list_member_hook<>, + &TransContext::deferred_queue_item> > deferred_queue_t; + + struct DeferredBatch final : public AioContext { + OpSequencer *osr; + struct deferred_io { + ceph::buffer::list bl; ///< data + uint64_t seq; ///< deferred transaction seq + }; + std::map<uint64_t,deferred_io> iomap; ///< map of ios in this batch + deferred_queue_t txcs; ///< txcs in this batch + IOContext ioc; ///< our aios + /// bytes of pending io for each deferred seq (may be 0) + std::map<uint64_t,int> seq_bytes; + + void _discard(CephContext *cct, uint64_t offset, uint64_t length); + void _audit(CephContext *cct); + + DeferredBatch(CephContext *cct, OpSequencer *osr) + : osr(osr), ioc(cct, this) {} + + /// prepare a write + void prepare_write(CephContext *cct, + uint64_t seq, uint64_t offset, uint64_t length, + ceph::buffer::list::const_iterator& p); + + void aio_finish(BlueStore *store) override { + store->_deferred_aio_finish(osr); + } + }; + + class OpSequencer : public RefCountedObject { + public: + ceph::mutex qlock = ceph::make_mutex("BlueStore::OpSequencer::qlock"); + ceph::condition_variable qcond; + typedef boost::intrusive::list< + TransContext, + boost::intrusive::member_hook< + TransContext, + boost::intrusive::list_member_hook<>, + &TransContext::sequencer_item> > q_list_t; + q_list_t q; ///< transactions + + boost::intrusive::list_member_hook<> deferred_osr_queue_item; + + DeferredBatch *deferred_running = nullptr; + DeferredBatch *deferred_pending = nullptr; + + ceph::mutex deferred_lock = ceph::make_mutex("BlueStore::OpSequencer::deferred_lock"); + + BlueStore *store; + coll_t cid; + + uint64_t last_seq = 0; + + std::atomic_int txc_with_unstable_io = {0}; ///< num txcs with unstable io + + std::atomic_int kv_committing_serially = {0}; + + std::atomic_int kv_submitted_waiters = {0}; + + std::atomic_bool zombie = {false}; ///< in zombie_osr std::set (collection going away) + + const uint32_t sequencer_id; + + uint32_t get_sequencer_id() const { + return sequencer_id; + } + + void queue_new(TransContext *txc) { + std::lock_guard l(qlock); + txc->seq = ++last_seq; + q.push_back(*txc); + } + + void drain() { + std::unique_lock l(qlock); + while (!q.empty()) + qcond.wait(l); + } + + void drain_preceding(TransContext *txc) { + std::unique_lock l(qlock); + while (&q.front() != txc) + qcond.wait(l); + } + + bool _is_all_kv_submitted() { + // caller must hold qlock & q.empty() must not empty + ceph_assert(!q.empty()); + TransContext *txc = &q.back(); + if (txc->get_state() >= TransContext::STATE_KV_SUBMITTED) { + return true; + } + return false; + } + + void flush() { + std::unique_lock l(qlock); + while (true) { + // std::set flag before the check because the condition + // may become true outside qlock, and we need to make + // sure those threads see waiters and signal qcond. + ++kv_submitted_waiters; + if (q.empty() || _is_all_kv_submitted()) { + --kv_submitted_waiters; + return; + } + qcond.wait(l); + --kv_submitted_waiters; + } + } + + void flush_all_but_last() { + std::unique_lock l(qlock); + assert (q.size() >= 1); + while (true) { + // std::set flag before the check because the condition + // may become true outside qlock, and we need to make + // sure those threads see waiters and signal qcond. + ++kv_submitted_waiters; + if (q.size() <= 1) { + --kv_submitted_waiters; + return; + } else { + auto it = q.rbegin(); + it++; + if (it->get_state() >= TransContext::STATE_KV_SUBMITTED) { + --kv_submitted_waiters; + return; + } + } + qcond.wait(l); + --kv_submitted_waiters; + } + } + + bool flush_commit(Context *c) { + std::lock_guard l(qlock); + if (q.empty()) { + return true; + } + TransContext *txc = &q.back(); + if (txc->get_state() >= TransContext::STATE_KV_DONE) { + return true; + } + txc->oncommits.push_back(c); + return false; + } + private: + FRIEND_MAKE_REF(OpSequencer); + OpSequencer(BlueStore *store, uint32_t sequencer_id, const coll_t& c) + : RefCountedObject(store->cct), + store(store), cid(c), sequencer_id(sequencer_id) { + } + ~OpSequencer() { + ceph_assert(q.empty()); + } + }; + + typedef boost::intrusive::list< + OpSequencer, + boost::intrusive::member_hook< + OpSequencer, + boost::intrusive::list_member_hook<>, + &OpSequencer::deferred_osr_queue_item> > deferred_osr_queue_t; + + struct KVSyncThread : public Thread { + BlueStore *store; + explicit KVSyncThread(BlueStore *s) : store(s) {} + void *entry() override { + store->_kv_sync_thread(); + return NULL; + } + }; + struct KVFinalizeThread : public Thread { + BlueStore *store; + explicit KVFinalizeThread(BlueStore *s) : store(s) {} + void *entry() override { + store->_kv_finalize_thread(); + return NULL; + } + }; + struct ZonedCleanerThread : public Thread { + BlueStore *store; + explicit ZonedCleanerThread(BlueStore *s) : store(s) {} + void *entry() override { + store->_zoned_cleaner_thread(); + return nullptr; + } + }; + + struct DBHistogram { + struct value_dist { + uint64_t count; + uint32_t max_len; + }; + + struct key_dist { + uint64_t count; + uint32_t max_len; + std::map<int, struct value_dist> val_map; ///< slab id to count, max length of value and key + }; + + std::map<std::string, std::map<int, struct key_dist> > key_hist; + std::map<int, uint64_t> value_hist; + int get_key_slab(size_t sz); + std::string get_key_slab_to_range(int slab); + int get_value_slab(size_t sz); + std::string get_value_slab_to_range(int slab); + void update_hist_entry(std::map<std::string, std::map<int, struct key_dist> > &key_hist, + const std::string &prefix, size_t key_size, size_t value_size); + void dump(ceph::Formatter *f); + }; + + struct BigDeferredWriteContext { + uint64_t off = 0; // original logical offset + uint32_t b_off = 0; // blob relative offset + uint32_t used = 0; + uint64_t head_read = 0; + uint64_t tail_read = 0; + BlobRef blob_ref; + uint64_t blob_start = 0; + PExtentVector res_extents; + + inline uint64_t blob_aligned_len() const { + return used + head_read + tail_read; + } + + bool can_defer(BlueStore::extent_map_t::iterator ep, + uint64_t prefer_deferred_size, + uint64_t block_size, + uint64_t offset, + uint64_t l); + bool apply_defer(); + }; + + // -------------------------------------------------------- + // members +private: + BlueFS *bluefs = nullptr; + bluefs_layout_t bluefs_layout; + utime_t next_dump_on_bluefs_alloc_failure; + + KeyValueDB *db = nullptr; + BlockDevice *bdev = nullptr; + std::string freelist_type; + FreelistManager *fm = nullptr; + + bluefs_shared_alloc_context_t shared_alloc; + + uuid_d fsid; + int path_fd = -1; ///< open handle to $path + int fsid_fd = -1; ///< open handle (locked) to $path/fsid + bool mounted = false; + + ceph::shared_mutex coll_lock = ceph::make_shared_mutex("BlueStore::coll_lock"); ///< rwlock to protect coll_map + mempool::bluestore_cache_other::unordered_map<coll_t, CollectionRef> coll_map; + bool collections_had_errors = false; + std::map<coll_t,CollectionRef> new_coll_map; + + std::vector<OnodeCacheShard*> onode_cache_shards; + std::vector<BufferCacheShard*> buffer_cache_shards; + + /// protect zombie_osr_set + ceph::mutex zombie_osr_lock = ceph::make_mutex("BlueStore::zombie_osr_lock"); + uint32_t next_sequencer_id = 0; + std::map<coll_t,OpSequencerRef> zombie_osr_set; ///< std::set of OpSequencers for deleted collections + + std::atomic<uint64_t> nid_last = {0}; + std::atomic<uint64_t> nid_max = {0}; + std::atomic<uint64_t> blobid_last = {0}; + std::atomic<uint64_t> blobid_max = {0}; + + ceph::mutex deferred_lock = ceph::make_mutex("BlueStore::deferred_lock"); + ceph::mutex atomic_alloc_and_submit_lock = + ceph::make_mutex("BlueStore::atomic_alloc_and_submit_lock"); + std::atomic<uint64_t> deferred_seq = {0}; + deferred_osr_queue_t deferred_queue; ///< osr's with deferred io pending + std::atomic_int deferred_queue_size = {0}; ///< num txc's queued across all osrs + std::atomic_int deferred_aggressive = {0}; ///< aggressive wakeup of kv thread + Finisher finisher; + utime_t deferred_last_submitted = utime_t(); + + KVSyncThread kv_sync_thread; + ceph::mutex kv_lock = ceph::make_mutex("BlueStore::kv_lock"); + ceph::condition_variable kv_cond; + bool _kv_only = false; + bool kv_sync_started = false; + bool kv_stop = false; + bool kv_finalize_started = false; + bool kv_finalize_stop = false; + std::deque<TransContext*> kv_queue; ///< ready, already submitted + std::deque<TransContext*> kv_queue_unsubmitted; ///< ready, need submit by kv thread + std::deque<TransContext*> kv_committing; ///< currently syncing + std::deque<DeferredBatch*> deferred_done_queue; ///< deferred ios done + bool kv_sync_in_progress = false; + + KVFinalizeThread kv_finalize_thread; + ceph::mutex kv_finalize_lock = ceph::make_mutex("BlueStore::kv_finalize_lock"); + ceph::condition_variable kv_finalize_cond; + std::deque<TransContext*> kv_committing_to_finalize; ///< pending finalization + std::deque<DeferredBatch*> deferred_stable_to_finalize; ///< pending finalization + bool kv_finalize_in_progress = false; + + ZonedCleanerThread zoned_cleaner_thread; + ceph::mutex zoned_cleaner_lock = ceph::make_mutex("BlueStore::zoned_cleaner_lock"); + ceph::condition_variable zoned_cleaner_cond; + bool zoned_cleaner_started = false; + bool zoned_cleaner_stop = false; + std::deque<uint64_t> zoned_cleaner_queue; + + PerfCounters *logger = nullptr; + + std::list<CollectionRef> removed_collections; + + ceph::shared_mutex debug_read_error_lock = + ceph::make_shared_mutex("BlueStore::debug_read_error_lock"); + std::set<ghobject_t> debug_data_error_objects; + std::set<ghobject_t> debug_mdata_error_objects; + + std::atomic<int> csum_type = {Checksummer::CSUM_CRC32C}; + + uint64_t block_size = 0; ///< block size of block device (power of 2) + uint64_t block_mask = 0; ///< mask to get just the block offset + size_t block_size_order = 0; ///< bits to shift to get block size + + uint64_t min_alloc_size; ///< minimum allocation unit (power of 2) + ///< bits for min_alloc_size + uint8_t min_alloc_size_order = 0; + static_assert(std::numeric_limits<uint8_t>::max() > + std::numeric_limits<decltype(min_alloc_size)>::digits, + "not enough bits for min_alloc_size"); + + enum { + // Please preserve the order since it's DB persistent + OMAP_BULK = 0, + OMAP_PER_POOL = 1, + OMAP_PER_PG = 2, + } per_pool_omap = OMAP_BULK; + + ///< maximum allocation unit (power of 2) + std::atomic<uint64_t> max_alloc_size = {0}; + + ///< number threshold for forced deferred writes + std::atomic<int> deferred_batch_ops = {0}; + + ///< size threshold for forced deferred writes + std::atomic<uint64_t> prefer_deferred_size = {0}; + + ///< approx cost per io, in bytes + std::atomic<uint64_t> throttle_cost_per_io = {0}; + + std::atomic<Compressor::CompressionMode> comp_mode = + {Compressor::COMP_NONE}; ///< compression mode + CompressorRef compressor; + std::atomic<uint64_t> comp_min_blob_size = {0}; + std::atomic<uint64_t> comp_max_blob_size = {0}; + + std::atomic<uint64_t> max_blob_size = {0}; ///< maximum blob size + + uint64_t kv_ios = 0; + uint64_t kv_throttle_costs = 0; + + // cache trim control + uint64_t cache_size = 0; ///< total cache size + double cache_meta_ratio = 0; ///< cache ratio dedicated to metadata + double cache_kv_ratio = 0; ///< cache ratio dedicated to kv (e.g., rocksdb) + double cache_kv_onode_ratio = 0; ///< cache ratio dedicated to kv onodes (e.g., rocksdb onode CF) + double cache_data_ratio = 0; ///< cache ratio dedicated to object data + bool cache_autotune = false; ///< cache autotune setting + double cache_autotune_interval = 0; ///< time to wait between cache rebalancing + uint64_t osd_memory_target = 0; ///< OSD memory target when autotuning cache + uint64_t osd_memory_base = 0; ///< OSD base memory when autotuning cache + double osd_memory_expected_fragmentation = 0; ///< expected memory fragmentation + uint64_t osd_memory_cache_min = 0; ///< Min memory to assign when autotuning cache + double osd_memory_cache_resize_interval = 0; ///< Time to wait between cache resizing + double max_defer_interval = 0; ///< Time to wait between last deferred submit + std::atomic<uint32_t> config_changed = {0}; ///< Counter to determine if there is a configuration change. + + typedef std::map<uint64_t, volatile_statfs> osd_pools_map; + + ceph::mutex vstatfs_lock = ceph::make_mutex("BlueStore::vstatfs_lock"); + volatile_statfs vstatfs; + osd_pools_map osd_pools; // protected by vstatfs_lock as well + + bool per_pool_stat_collection = true; + + struct MempoolThread : public Thread { + public: + BlueStore *store; + + ceph::condition_variable cond; + ceph::mutex lock = ceph::make_mutex("BlueStore::MempoolThread::lock"); + bool stop = false; + std::shared_ptr<PriorityCache::PriCache> binned_kv_cache = nullptr; + std::shared_ptr<PriorityCache::PriCache> binned_kv_onode_cache = nullptr; + std::shared_ptr<PriorityCache::Manager> pcm = nullptr; + + struct MempoolCache : public PriorityCache::PriCache { + BlueStore *store; + int64_t cache_bytes[PriorityCache::Priority::LAST+1] = {0}; + int64_t committed_bytes = 0; + double cache_ratio = 0; + + MempoolCache(BlueStore *s) : store(s) {}; + + virtual uint64_t _get_used_bytes() const = 0; + + virtual int64_t request_cache_bytes( + PriorityCache::Priority pri, uint64_t total_cache) const { + int64_t assigned = get_cache_bytes(pri); + + switch (pri) { + // All cache items are currently shoved into the PRI1 priority + case PriorityCache::Priority::PRI1: + { + int64_t request = _get_used_bytes(); + return(request > assigned) ? request - assigned : 0; + } + default: + break; + } + return -EOPNOTSUPP; + } + + virtual int64_t get_cache_bytes(PriorityCache::Priority pri) const { + return cache_bytes[pri]; + } + virtual int64_t get_cache_bytes() const { + int64_t total = 0; + + for (int i = 0; i < PriorityCache::Priority::LAST + 1; i++) { + PriorityCache::Priority pri = static_cast<PriorityCache::Priority>(i); + total += get_cache_bytes(pri); + } + return total; + } + virtual void set_cache_bytes(PriorityCache::Priority pri, int64_t bytes) { + cache_bytes[pri] = bytes; + } + virtual void add_cache_bytes(PriorityCache::Priority pri, int64_t bytes) { + cache_bytes[pri] += bytes; + } + virtual int64_t commit_cache_size(uint64_t total_cache) { + committed_bytes = PriorityCache::get_chunk( + get_cache_bytes(), total_cache); + return committed_bytes; + } + virtual int64_t get_committed_size() const { + return committed_bytes; + } + virtual double get_cache_ratio() const { + return cache_ratio; + } + virtual void set_cache_ratio(double ratio) { + cache_ratio = ratio; + } + virtual std::string get_cache_name() const = 0; + }; + + struct MetaCache : public MempoolCache { + MetaCache(BlueStore *s) : MempoolCache(s) {}; + + virtual uint64_t _get_used_bytes() const { + return mempool::bluestore_Buffer::allocated_bytes() + + mempool::bluestore_Blob::allocated_bytes() + + mempool::bluestore_Extent::allocated_bytes() + + mempool::bluestore_cache_meta::allocated_bytes() + + mempool::bluestore_cache_other::allocated_bytes() + + mempool::bluestore_cache_onode::allocated_bytes() + + mempool::bluestore_SharedBlob::allocated_bytes() + + mempool::bluestore_inline_bl::allocated_bytes(); + } + + virtual std::string get_cache_name() const { + return "BlueStore Meta Cache"; + } + + uint64_t _get_num_onodes() const { + uint64_t onode_num = + mempool::bluestore_cache_onode::allocated_items(); + return (2 > onode_num) ? 2 : onode_num; + } + + double get_bytes_per_onode() const { + return (double)_get_used_bytes() / (double)_get_num_onodes(); + } + }; + std::shared_ptr<MetaCache> meta_cache; + + struct DataCache : public MempoolCache { + DataCache(BlueStore *s) : MempoolCache(s) {}; + + virtual uint64_t _get_used_bytes() const { + uint64_t bytes = 0; + for (auto i : store->buffer_cache_shards) { + bytes += i->_get_bytes(); + } + return bytes; + } + virtual std::string get_cache_name() const { + return "BlueStore Data Cache"; + } + }; + std::shared_ptr<DataCache> data_cache; + + public: + explicit MempoolThread(BlueStore *s) + : store(s), + meta_cache(new MetaCache(s)), + data_cache(new DataCache(s)) {} + + void *entry() override; + void init() { + ceph_assert(stop == false); + create("bstore_mempool"); + } + void shutdown() { + lock.lock(); + stop = true; + cond.notify_all(); + lock.unlock(); + join(); + } + + private: + void _adjust_cache_settings(); + void _update_cache_settings(); + void _resize_shards(bool interval_stats); + } mempool_thread; + +#ifdef WITH_BLKIN + ZTracer::Endpoint trace_endpoint {"0.0.0.0", 0, "BlueStore"}; +#endif + + // -------------------------------------------------------- + // private methods + + void _init_logger(); + void _shutdown_logger(); + int _reload_logger(); + + int _open_path(); + void _close_path(); + int _open_fsid(bool create); + int _lock_fsid(); + int _read_fsid(uuid_d *f); + int _write_fsid(); + void _close_fsid(); + void _set_alloc_sizes(); + void _set_blob_size(); + void _set_finisher_num(); + void _set_per_pool_omap(); + void _update_osd_memory_options(); + + int _open_bdev(bool create); + // Verifies if disk space is enough for reserved + min bluefs + // and alters the latter if needed. + // Depends on min_alloc_size hence should be called after + // its initialization (and outside of _open_bdev) + void _validate_bdev(); + void _close_bdev(); + + int _minimal_open_bluefs(bool create); + void _minimal_close_bluefs(); + int _open_bluefs(bool create, bool read_only); + void _close_bluefs(bool cold_close); + + int _is_bluefs(bool create, bool* ret); + /* + * opens both DB and dependant super_meta, FreelistManager and allocator + * in the proper order + */ + int _open_db_and_around(bool read_only, bool to_repair = false); + void _close_db_and_around(bool read_only); + + int _prepare_db_environment(bool create, bool read_only, + std::string* kv_dir, std::string* kv_backend); + + /* + * @warning to_repair_db means that we open this db to repair it, will not + * hold the rocksdb's file lock. + */ + int _open_db(bool create, + bool to_repair_db=false, + bool read_only = false); + void _close_db(bool read_only); + int _open_fm(KeyValueDB::Transaction t, bool read_only); + void _close_fm(); + int _write_out_fm_meta(uint64_t target_size); + int _create_alloc(); + int _init_alloc(); + void _close_alloc(); + int _open_collections(); + void _fsck_collections(int64_t* errors); + void _close_collections(); + + int _setup_block_symlink_or_file(std::string name, std::string path, uint64_t size, + bool create); + + // Functions related to zoned storage. + uint64_t _zoned_piggyback_device_parameters_onto(uint64_t min_alloc_size); + int _zoned_check_config_settings(); + void _zoned_update_cleaning_metadata(TransContext *txc); + std::string _zoned_get_prefix(uint64_t offset); + +public: + utime_t get_deferred_last_submitted() { + std::lock_guard l(deferred_lock); + return deferred_last_submitted; + } + + static int _write_bdev_label(CephContext* cct, + std::string path, bluestore_bdev_label_t label); + static int _read_bdev_label(CephContext* cct, std::string path, + bluestore_bdev_label_t *label); +private: + int _check_or_set_bdev_label(std::string path, uint64_t size, std::string desc, + bool create); + int _set_bdev_label_size(const string& path, uint64_t size); + + int _open_super_meta(); + + void _open_statfs(); + void _get_statfs_overall(struct store_statfs_t *buf); + + void _dump_alloc_on_failure(); + + CollectionRef _get_collection(const coll_t& cid); + void _queue_reap_collection(CollectionRef& c); + void _reap_collections(); + void _update_cache_logger(); + + void _assign_nid(TransContext *txc, OnodeRef o); + uint64_t _assign_blobid(TransContext *txc); + + template <int LogLevelV> + friend void _dump_onode(CephContext *cct, const Onode& o); + template <int LogLevelV> + friend void _dump_extent_map(CephContext *cct, const ExtentMap& em); + template <int LogLevelV> + friend void _dump_transaction(CephContext *cct, Transaction *t); + + TransContext *_txc_create(Collection *c, OpSequencer *osr, + std::list<Context*> *on_commits, + TrackedOpRef osd_op=TrackedOpRef()); + void _txc_update_store_statfs(TransContext *txc); + void _txc_add_transaction(TransContext *txc, Transaction *t); + void _txc_calc_cost(TransContext *txc); + void _txc_write_nodes(TransContext *txc, KeyValueDB::Transaction t); + void _txc_state_proc(TransContext *txc); + void _txc_aio_submit(TransContext *txc); +public: + void txc_aio_finish(void *p) { + _txc_state_proc(static_cast<TransContext*>(p)); + } +private: + void _txc_finish_io(TransContext *txc); + void _txc_finalize_kv(TransContext *txc, KeyValueDB::Transaction t); + void _txc_apply_kv(TransContext *txc, bool sync_submit_transaction); + void _txc_committed_kv(TransContext *txc); + void _txc_finish(TransContext *txc); + void _txc_release_alloc(TransContext *txc); + + void _osr_attach(Collection *c); + void _osr_register_zombie(OpSequencer *osr); + void _osr_drain(OpSequencer *osr); + void _osr_drain_preceding(TransContext *txc); + void _osr_drain_all(); + + void _kv_start(); + void _kv_stop(); + void _kv_sync_thread(); + void _kv_finalize_thread(); + + void _zoned_cleaner_start(); + void _zoned_cleaner_stop(); + void _zoned_cleaner_thread(); + void _zoned_clean_zone(uint64_t zone_num); + + bluestore_deferred_op_t *_get_deferred_op(TransContext *txc, uint64_t len); + void _deferred_queue(TransContext *txc); +public: + void deferred_try_submit(); +private: + void _deferred_submit_unlock(OpSequencer *osr); + void _deferred_aio_finish(OpSequencer *osr); + int _deferred_replay(); + bool _eliminate_outdated_deferred(bluestore_deferred_transaction_t* deferred_txn, + interval_set<uint64_t>& bluefs_extents); + +public: + using mempool_dynamic_bitset = + boost::dynamic_bitset<uint64_t, + mempool::bluestore_fsck::pool_allocator<uint64_t>>; + using per_pool_statfs = + mempool::bluestore_fsck::map<uint64_t, store_statfs_t>; + + enum FSCKDepth { + FSCK_REGULAR, + FSCK_DEEP, + FSCK_SHALLOW + }; + enum { + MAX_FSCK_ERROR_LINES = 100, + }; + +private: + int _fsck_check_extents( + std::string_view ctx_descr, + const PExtentVector& extents, + bool compressed, + mempool_dynamic_bitset &used_blocks, + uint64_t granularity, + BlueStoreRepairer* repairer, + store_statfs_t& expected_statfs, + FSCKDepth depth); + + void _fsck_check_pool_statfs( + per_pool_statfs& expected_pool_statfs, + int64_t& errors, + int64_t &warnings, + BlueStoreRepairer* repairer); + void _fsck_repair_shared_blobs( + BlueStoreRepairer& repairer, + shared_blob_2hash_tracker_t& sb_ref_counts, + sb_info_space_efficient_map_t& sb_info); + + int _fsck(FSCKDepth depth, bool repair); + int _fsck_on_open(BlueStore::FSCKDepth depth, bool repair); + + void _buffer_cache_write( + TransContext *txc, + BlobRef b, + uint64_t offset, + ceph::buffer::list& bl, + unsigned flags) { + b->shared_blob->bc.write(b->shared_blob->get_cache(), txc->seq, offset, bl, + flags); + txc->shared_blobs_written.insert(b->shared_blob); + } + + int _collection_list( + Collection *c, const ghobject_t& start, const ghobject_t& end, + int max, bool legacy, std::vector<ghobject_t> *ls, ghobject_t *next); + + template <typename T, typename F> + T select_option(const std::string& opt_name, T val1, F f) { + //NB: opt_name reserved for future use + boost::optional<T> val2 = f(); + if (val2) { + return *val2; + } + return val1; + } + + void _apply_padding(uint64_t head_pad, + uint64_t tail_pad, + ceph::buffer::list& padded); + + void _record_onode(OnodeRef &o, KeyValueDB::Transaction &txn); + + // -- ondisk version --- +public: + const int32_t latest_ondisk_format = 4; ///< our version + const int32_t min_readable_ondisk_format = 1; ///< what we can read + const int32_t min_compat_ondisk_format = 3; ///< who can read us + +private: + int32_t ondisk_format = 0; ///< value detected on mount + + int _upgrade_super(); ///< upgrade (called during open_super) + uint64_t _get_ondisk_reserved() const; + void _prepare_ondisk_format_super(KeyValueDB::Transaction& t); + + // --- public interface --- +public: + BlueStore(CephContext *cct, const std::string& path); + BlueStore(CephContext *cct, const std::string& path, uint64_t min_alloc_size); // Ctor for UT only + ~BlueStore() override; + + std::string get_type() override { + return "bluestore"; + } + + bool needs_journal() override { return false; }; + bool wants_journal() override { return false; }; + bool allows_journal() override { return false; }; + + uint64_t get_min_alloc_size() const override { + return min_alloc_size; + } + + int get_devices(std::set<std::string> *ls) override; + + bool is_rotational() override; + bool is_journal_rotational() override; + + std::string get_default_device_class() override { + std::string device_class; + std::map<std::string, std::string> metadata; + collect_metadata(&metadata); + auto it = metadata.find("bluestore_bdev_type"); + if (it != metadata.end()) { + device_class = it->second; + } + return device_class; + } + + int get_numa_node( + int *numa_node, + std::set<int> *nodes, + std::set<std::string> *failed) override; + + static int get_block_device_fsid(CephContext* cct, const std::string& path, + uuid_d *fsid); + + bool test_mount_in_use() override; + +private: + int _mount(); +public: + int mount() override { + return _mount(); + } + int umount() override; + + int open_db_environment(KeyValueDB **pdb, bool to_repair); + int close_db_environment(); + BlueFS* get_bluefs(); + + int write_meta(const std::string& key, const std::string& value) override; + int read_meta(const std::string& key, std::string *value) override; + + // open in read-only and limited mode + int cold_open(); + int cold_close(); + + int fsck(bool deep) override { + return _fsck(deep ? FSCK_DEEP : FSCK_REGULAR, false); + } + int repair(bool deep) override { + return _fsck(deep ? FSCK_DEEP : FSCK_REGULAR, true); + } + int quick_fix() override { + return _fsck(FSCK_SHALLOW, true); + } + + void set_cache_shards(unsigned num) override; + void dump_cache_stats(ceph::Formatter *f) override { + int onode_count = 0, buffers_bytes = 0; + for (auto i: onode_cache_shards) { + onode_count += i->_get_num(); + } + for (auto i: buffer_cache_shards) { + buffers_bytes += i->_get_bytes(); + } + f->dump_int("bluestore_onode", onode_count); + f->dump_int("bluestore_buffers", buffers_bytes); + } + void dump_cache_stats(std::ostream& ss) override { + int onode_count = 0, buffers_bytes = 0; + for (auto i: onode_cache_shards) { + onode_count += i->_get_num(); + } + for (auto i: buffer_cache_shards) { + buffers_bytes += i->_get_bytes(); + } + ss << "bluestore_onode: " << onode_count; + ss << "bluestore_buffers: " << buffers_bytes; + } + + int validate_hobject_key(const hobject_t &obj) const override { + return 0; + } + unsigned get_max_attr_name_length() override { + return 256; // arbitrary; there is no real limit internally + } + + int mkfs() override; + int mkjournal() override { + return 0; + } + + void get_db_statistics(ceph::Formatter *f) override; + void generate_db_histogram(ceph::Formatter *f) override; + void _shutdown_cache(); + int flush_cache(std::ostream *os = NULL) override; + void dump_perf_counters(ceph::Formatter *f) override { + f->open_object_section("perf_counters"); + logger->dump_formatted(f, false); + f->close_section(); + } + + int add_new_bluefs_device(int id, const std::string& path); + int migrate_to_existing_bluefs_device(const std::set<int>& devs_source, + int id); + int migrate_to_new_bluefs_device(const std::set<int>& devs_source, + int id, + const std::string& path); + int expand_devices(std::ostream& out); + std::string get_device_path(unsigned id); + + int dump_bluefs_sizes(ostream& out); + +public: + int statfs(struct store_statfs_t *buf, + osd_alert_list_t* alerts = nullptr) override; + int pool_statfs(uint64_t pool_id, struct store_statfs_t *buf, + bool *per_pool_omap) override; + + void collect_metadata(std::map<std::string,std::string> *pm) override; + + bool exists(CollectionHandle &c, const ghobject_t& oid) override; + int set_collection_opts( + CollectionHandle& c, + const pool_opts_t& opts) override; + int stat( + CollectionHandle &c, + const ghobject_t& oid, + struct stat *st, + bool allow_eio = false) override; + int read( + CollectionHandle &c, + const ghobject_t& oid, + uint64_t offset, + size_t len, + ceph::buffer::list& bl, + uint32_t op_flags = 0) override; + +private: + + // -------------------------------------------------------- + // intermediate data structures used while reading + struct region_t { + uint64_t logical_offset; + uint64_t blob_xoffset; //region offset within the blob + uint64_t length; + + // used later in read process + uint64_t front = 0; + + region_t(uint64_t offset, uint64_t b_offs, uint64_t len, uint64_t front = 0) + : logical_offset(offset), + blob_xoffset(b_offs), + length(len), + front(front){} + region_t(const region_t& from) + : logical_offset(from.logical_offset), + blob_xoffset(from.blob_xoffset), + length(from.length), + front(from.front){} + + friend std::ostream& operator<<(std::ostream& out, const region_t& r) { + return out << "0x" << std::hex << r.logical_offset << ":" + << r.blob_xoffset << "~" << r.length << std::dec; + } + }; + + // merged blob read request + struct read_req_t { + uint64_t r_off = 0; + uint64_t r_len = 0; + ceph::buffer::list bl; + std::list<region_t> regs; // original read regions + + read_req_t(uint64_t off, uint64_t len) : r_off(off), r_len(len) {} + + friend std::ostream& operator<<(std::ostream& out, const read_req_t& r) { + out << "{<0x" << std::hex << r.r_off << ", 0x" << r.r_len << "> : ["; + for (const auto& reg : r.regs) + out << reg; + return out << "]}" << std::dec; + } + }; + + typedef std::list<read_req_t> regions2read_t; + typedef std::map<BlueStore::BlobRef, regions2read_t> blobs2read_t; + + void _read_cache( + OnodeRef o, + uint64_t offset, + size_t length, + int read_cache_policy, + ready_regions_t& ready_regions, + blobs2read_t& blobs2read); + + + int _prepare_read_ioc( + blobs2read_t& blobs2read, + std::vector<ceph::buffer::list>* compressed_blob_bls, + IOContext* ioc); + + int _generate_read_result_bl( + OnodeRef o, + uint64_t offset, + size_t length, + ready_regions_t& ready_regions, + std::vector<ceph::buffer::list>& compressed_blob_bls, + blobs2read_t& blobs2read, + bool buffered, + bool* csum_error, + ceph::buffer::list& bl); + + int _do_read( + Collection *c, + OnodeRef o, + uint64_t offset, + size_t len, + ceph::buffer::list& bl, + uint32_t op_flags = 0, + uint64_t retry_count = 0); + + int _do_readv( + Collection *c, + OnodeRef o, + const interval_set<uint64_t>& m, + ceph::buffer::list& bl, + uint32_t op_flags = 0, + uint64_t retry_count = 0); + + int _fiemap(CollectionHandle &c_, const ghobject_t& oid, + uint64_t offset, size_t len, interval_set<uint64_t>& destset); +public: + int fiemap(CollectionHandle &c, const ghobject_t& oid, + uint64_t offset, size_t len, ceph::buffer::list& bl) override; + int fiemap(CollectionHandle &c, const ghobject_t& oid, + uint64_t offset, size_t len, std::map<uint64_t, uint64_t>& destmap) override; + + int readv( + CollectionHandle &c_, + const ghobject_t& oid, + interval_set<uint64_t>& m, + ceph::buffer::list& bl, + uint32_t op_flags) override; + + int dump_onode(CollectionHandle &c, const ghobject_t& oid, + const std::string& section_name, ceph::Formatter *f) override; + + int getattr(CollectionHandle &c, const ghobject_t& oid, const char *name, + ceph::buffer::ptr& value) override; + + int getattrs(CollectionHandle &c, const ghobject_t& oid, + std::map<std::string,ceph::buffer::ptr>& aset) override; + + int list_collections(std::vector<coll_t>& ls) override; + + CollectionHandle open_collection(const coll_t &c) override; + CollectionHandle create_new_collection(const coll_t& cid) override; + void set_collection_commit_queue(const coll_t& cid, + ContextQueue *commit_queue) override; + + bool collection_exists(const coll_t& c) override; + int collection_empty(CollectionHandle& c, bool *empty) override; + int collection_bits(CollectionHandle& c) override; + + int collection_list(CollectionHandle &c, + const ghobject_t& start, + const ghobject_t& end, + int max, + std::vector<ghobject_t> *ls, ghobject_t *next) override; + + int collection_list_legacy(CollectionHandle &c, + const ghobject_t& start, + const ghobject_t& end, + int max, + std::vector<ghobject_t> *ls, + ghobject_t *next) override; + + int omap_get( + CollectionHandle &c, ///< [in] Collection containing oid + const ghobject_t &oid, ///< [in] Object containing omap + ceph::buffer::list *header, ///< [out] omap header + std::map<std::string, ceph::buffer::list> *out /// < [out] Key to value map + ) override; + int _omap_get( + Collection *c, ///< [in] Collection containing oid + const ghobject_t &oid, ///< [in] Object containing omap + ceph::buffer::list *header, ///< [out] omap header + std::map<std::string, ceph::buffer::list> *out /// < [out] Key to value map + ); + int _onode_omap_get( + const OnodeRef &o, ///< [in] Object containing omap + ceph::buffer::list *header, ///< [out] omap header + std::map<std::string, ceph::buffer::list> *out /// < [out] Key to value map + ); + + + /// Get omap header + int omap_get_header( + CollectionHandle &c, ///< [in] Collection containing oid + const ghobject_t &oid, ///< [in] Object containing omap + ceph::buffer::list *header, ///< [out] omap header + bool allow_eio = false ///< [in] don't assert on eio + ) override; + + /// Get keys defined on oid + int omap_get_keys( + CollectionHandle &c, ///< [in] Collection containing oid + const ghobject_t &oid, ///< [in] Object containing omap + std::set<std::string> *keys ///< [out] Keys defined on oid + ) override; + + /// Get key values + int omap_get_values( + CollectionHandle &c, ///< [in] Collection containing oid + const ghobject_t &oid, ///< [in] Object containing omap + const std::set<std::string> &keys, ///< [in] Keys to get + std::map<std::string, ceph::buffer::list> *out ///< [out] Returned keys and values + ) override; + +#ifdef WITH_SEASTAR + int omap_get_values( + CollectionHandle &c, ///< [in] Collection containing oid + const ghobject_t &oid, ///< [in] Object containing omap + const std::optional<std::string> &start_after, ///< [in] Keys to get + std::map<std::string, ceph::buffer::list> *out ///< [out] Returned keys and values + ) override; +#endif + + /// Filters keys into out which are defined on oid + int omap_check_keys( + CollectionHandle &c, ///< [in] Collection containing oid + const ghobject_t &oid, ///< [in] Object containing omap + const std::set<std::string> &keys, ///< [in] Keys to check + std::set<std::string> *out ///< [out] Subset of keys defined on oid + ) override; + + ObjectMap::ObjectMapIterator get_omap_iterator( + CollectionHandle &c, ///< [in] collection + const ghobject_t &oid ///< [in] object + ) override; + + void set_fsid(uuid_d u) override { + fsid = u; + } + uuid_d get_fsid() override { + return fsid; + } + + uint64_t estimate_objects_overhead(uint64_t num_objects) override { + return num_objects * 300; //assuming per-object overhead is 300 bytes + } + + struct BSPerfTracker { + PerfCounters::avg_tracker<uint64_t> os_commit_latency_ns; + PerfCounters::avg_tracker<uint64_t> os_apply_latency_ns; + + objectstore_perf_stat_t get_cur_stats() const { + objectstore_perf_stat_t ret; + ret.os_commit_latency_ns = os_commit_latency_ns.current_avg(); + ret.os_apply_latency_ns = os_apply_latency_ns.current_avg(); + return ret; + } + + void update_from_perfcounters(PerfCounters &logger); + } perf_tracker; + + objectstore_perf_stat_t get_cur_stats() override { + perf_tracker.update_from_perfcounters(*logger); + return perf_tracker.get_cur_stats(); + } + const PerfCounters* get_perf_counters() const override { + return logger; + } + const PerfCounters* get_bluefs_perf_counters() const { + return bluefs->get_perf_counters(); + } + KeyValueDB* get_kv() { + return db; + } + + int queue_transactions( + CollectionHandle& ch, + std::vector<Transaction>& tls, + TrackedOpRef op = TrackedOpRef(), + ThreadPool::TPHandle *handle = NULL) override; + + // error injection + void inject_data_error(const ghobject_t& o) override { + std::unique_lock l(debug_read_error_lock); + debug_data_error_objects.insert(o); + } + void inject_mdata_error(const ghobject_t& o) override { + std::unique_lock l(debug_read_error_lock); + debug_mdata_error_objects.insert(o); + } + + /// methods to inject various errors fsck can repair + void inject_broken_shared_blob_key(const std::string& key, + const ceph::buffer::list& bl); + void inject_no_shared_blob_key(); + void inject_stray_shared_blob_key(uint64_t sbid); + + void inject_leaked(uint64_t len); + void inject_false_free(coll_t cid, ghobject_t oid); + void inject_statfs(const std::string& key, const store_statfs_t& new_statfs); + void inject_global_statfs(const store_statfs_t& new_statfs); + void inject_misreference(coll_t cid1, ghobject_t oid1, + coll_t cid2, ghobject_t oid2, + uint64_t offset); + void inject_zombie_spanning_blob(coll_t cid, ghobject_t oid, int16_t blob_id); + // resets global per_pool_omap in DB + void inject_legacy_omap(); + // resets per_pool_omap | pgmeta_omap for onode + void inject_legacy_omap(coll_t cid, ghobject_t oid); + + void inject_bluefs_file(std::string_view dir, + std::string_view name, + size_t new_size); + + void compact() override { + ceph_assert(db); + db->compact(); + } + bool has_builtin_csum() const override { + return true; + } + + inline void log_latency(const char* name, + int idx, + const ceph::timespan& lat, + double lat_threshold, + const char* info = "") const; + + inline void log_latency_fn(const char* name, + int idx, + const ceph::timespan& lat, + double lat_threshold, + std::function<std::string (const ceph::timespan& lat)> fn) const; + +private: + bool _debug_data_eio(const ghobject_t& o) { + if (!cct->_conf->bluestore_debug_inject_read_err) { + return false; + } + std::shared_lock l(debug_read_error_lock); + return debug_data_error_objects.count(o); + } + bool _debug_mdata_eio(const ghobject_t& o) { + if (!cct->_conf->bluestore_debug_inject_read_err) { + return false; + } + std::shared_lock l(debug_read_error_lock); + return debug_mdata_error_objects.count(o); + } + void _debug_obj_on_delete(const ghobject_t& o) { + if (cct->_conf->bluestore_debug_inject_read_err) { + std::unique_lock l(debug_read_error_lock); + debug_data_error_objects.erase(o); + debug_mdata_error_objects.erase(o); + } + } +private: + ceph::mutex qlock = ceph::make_mutex("BlueStore::Alerts::qlock"); + std::string failed_cmode; + std::set<std::string> failed_compressors; + std::string spillover_alert; + std::string legacy_statfs_alert; + std::string no_per_pool_omap_alert; + std::string no_per_pg_omap_alert; + std::string disk_size_mismatch_alert; + std::string spurious_read_errors_alert; + + void _log_alerts(osd_alert_list_t& alerts); + bool _set_compression_alert(bool cmode, const char* s) { + std::lock_guard l(qlock); + if (cmode) { + bool ret = failed_cmode.empty(); + failed_cmode = s; + return ret; + } + return failed_compressors.emplace(s).second; + } + void _clear_compression_alert() { + std::lock_guard l(qlock); + failed_compressors.clear(); + failed_cmode.clear(); + } + + void _set_spillover_alert(const std::string& s) { + std::lock_guard l(qlock); + spillover_alert = s; + } + void _clear_spillover_alert() { + std::lock_guard l(qlock); + spillover_alert.clear(); + } + + void _check_legacy_statfs_alert(); + void _check_no_per_pg_or_pool_omap_alert(); + void _set_disk_size_mismatch_alert(const std::string& s) { + std::lock_guard l(qlock); + disk_size_mismatch_alert = s; + } + void _set_spurious_read_errors_alert(const string& s) { + std::lock_guard l(qlock); + spurious_read_errors_alert = s; + } + +private: + + // -------------------------------------------------------- + // read processing internal methods + int _verify_csum( + OnodeRef& o, + const bluestore_blob_t* blob, + uint64_t blob_xoffset, + const ceph::buffer::list& bl, + uint64_t logical_offset) const; + int _decompress(ceph::buffer::list& source, ceph::buffer::list* result); + + + // -------------------------------------------------------- + // write ops + + struct WriteContext { + bool buffered = false; ///< buffered write + bool compress = false; ///< compressed write + uint64_t target_blob_size = 0; ///< target (max) blob size + unsigned csum_order = 0; ///< target checksum chunk order + + old_extent_map_t old_extents; ///< must deref these blobs + interval_set<uint64_t> extents_to_gc; ///< extents for garbage collection + + struct write_item { + uint64_t logical_offset; ///< write logical offset + BlobRef b; + uint64_t blob_length; + uint64_t b_off; + ceph::buffer::list bl; + uint64_t b_off0; ///< original offset in a blob prior to padding + uint64_t length0; ///< original data length prior to padding + + bool mark_unused; + bool new_blob; ///< whether new blob was created + + bool compressed = false; + ceph::buffer::list compressed_bl; + size_t compressed_len = 0; + + write_item( + uint64_t logical_offs, + BlobRef b, + uint64_t blob_len, + uint64_t o, + ceph::buffer::list& bl, + uint64_t o0, + uint64_t l0, + bool _mark_unused, + bool _new_blob) + : + logical_offset(logical_offs), + b(b), + blob_length(blob_len), + b_off(o), + bl(bl), + b_off0(o0), + length0(l0), + mark_unused(_mark_unused), + new_blob(_new_blob) {} + }; + std::vector<write_item> writes; ///< blobs we're writing + + /// partial clone of the context + void fork(const WriteContext& other) { + buffered = other.buffered; + compress = other.compress; + target_blob_size = other.target_blob_size; + csum_order = other.csum_order; + } + void write( + uint64_t loffs, + BlobRef b, + uint64_t blob_len, + uint64_t o, + ceph::buffer::list& bl, + uint64_t o0, + uint64_t len0, + bool _mark_unused, + bool _new_blob) { + writes.emplace_back(loffs, + b, + blob_len, + o, + bl, + o0, + len0, + _mark_unused, + _new_blob); + } + /// Checks for writes to the same pextent within a blob + bool has_conflict( + BlobRef b, + uint64_t loffs, + uint64_t loffs_end, + uint64_t min_alloc_size); + }; + + void _do_write_small( + TransContext *txc, + CollectionRef &c, + OnodeRef o, + uint64_t offset, uint64_t length, + ceph::buffer::list::iterator& blp, + WriteContext *wctx); + void _do_write_big_apply_deferred( + TransContext* txc, + CollectionRef& c, + OnodeRef o, + BigDeferredWriteContext& dctx, + bufferlist::iterator& blp, + WriteContext* wctx); + void _do_write_big( + TransContext *txc, + CollectionRef &c, + OnodeRef o, + uint64_t offset, uint64_t length, + ceph::buffer::list::iterator& blp, + WriteContext *wctx); + int _do_alloc_write( + TransContext *txc, + CollectionRef c, + OnodeRef o, + WriteContext *wctx); + void _wctx_finish( + TransContext *txc, + CollectionRef& c, + OnodeRef o, + WriteContext *wctx, + std::set<SharedBlob*> *maybe_unshared_blobs=0); + + int _write(TransContext *txc, + CollectionRef& c, + OnodeRef& o, + uint64_t offset, size_t len, + ceph::buffer::list& bl, + uint32_t fadvise_flags); + void _pad_zeros(ceph::buffer::list *bl, uint64_t *offset, + uint64_t chunk_size); + + void _choose_write_options(CollectionRef& c, + OnodeRef o, + uint32_t fadvise_flags, + WriteContext *wctx); + + int _do_gc(TransContext *txc, + CollectionRef& c, + OnodeRef o, + const WriteContext& wctx, + uint64_t *dirty_start, + uint64_t *dirty_end); + + int _do_write(TransContext *txc, + CollectionRef &c, + OnodeRef o, + uint64_t offset, uint64_t length, + ceph::buffer::list& bl, + uint32_t fadvise_flags); + void _do_write_data(TransContext *txc, + CollectionRef& c, + OnodeRef o, + uint64_t offset, + uint64_t length, + ceph::buffer::list& bl, + WriteContext *wctx); + + int _touch(TransContext *txc, + CollectionRef& c, + OnodeRef& o); + int _do_zero(TransContext *txc, + CollectionRef& c, + OnodeRef& o, + uint64_t offset, size_t len); + int _zero(TransContext *txc, + CollectionRef& c, + OnodeRef& o, + uint64_t offset, size_t len); + void _do_truncate(TransContext *txc, + CollectionRef& c, + OnodeRef o, + uint64_t offset, + std::set<SharedBlob*> *maybe_unshared_blobs=0); + int _truncate(TransContext *txc, + CollectionRef& c, + OnodeRef& o, + uint64_t offset); + int _remove(TransContext *txc, + CollectionRef& c, + OnodeRef& o); + int _do_remove(TransContext *txc, + CollectionRef& c, + OnodeRef o); + int _setattr(TransContext *txc, + CollectionRef& c, + OnodeRef& o, + const std::string& name, + ceph::buffer::ptr& val); + int _setattrs(TransContext *txc, + CollectionRef& c, + OnodeRef& o, + const std::map<std::string,ceph::buffer::ptr>& aset); + int _rmattr(TransContext *txc, + CollectionRef& c, + OnodeRef& o, + const std::string& name); + int _rmattrs(TransContext *txc, + CollectionRef& c, + OnodeRef& o); + void _do_omap_clear(TransContext *txc, OnodeRef &o); + int _omap_clear(TransContext *txc, + CollectionRef& c, + OnodeRef& o); + int _omap_setkeys(TransContext *txc, + CollectionRef& c, + OnodeRef& o, + ceph::buffer::list& bl); + int _omap_setheader(TransContext *txc, + CollectionRef& c, + OnodeRef& o, + ceph::buffer::list& header); + int _omap_rmkeys(TransContext *txc, + CollectionRef& c, + OnodeRef& o, + ceph::buffer::list& bl); + int _omap_rmkey_range(TransContext *txc, + CollectionRef& c, + OnodeRef& o, + const std::string& first, const std::string& last); + int _set_alloc_hint( + TransContext *txc, + CollectionRef& c, + OnodeRef& o, + uint64_t expected_object_size, + uint64_t expected_write_size, + uint32_t flags); + int _do_clone_range(TransContext *txc, + CollectionRef& c, + OnodeRef& oldo, + OnodeRef& newo, + uint64_t srcoff, uint64_t length, uint64_t dstoff); + int _clone(TransContext *txc, + CollectionRef& c, + OnodeRef& oldo, + OnodeRef& newo); + int _clone_range(TransContext *txc, + CollectionRef& c, + OnodeRef& oldo, + OnodeRef& newo, + uint64_t srcoff, uint64_t length, uint64_t dstoff); + int _rename(TransContext *txc, + CollectionRef& c, + OnodeRef& oldo, + OnodeRef& newo, + const ghobject_t& new_oid); + int _create_collection(TransContext *txc, const coll_t &cid, + unsigned bits, CollectionRef *c); + int _remove_collection(TransContext *txc, const coll_t &cid, + CollectionRef *c); + void _do_remove_collection(TransContext *txc, CollectionRef *c); + int _split_collection(TransContext *txc, + CollectionRef& c, + CollectionRef& d, + unsigned bits, int rem); + int _merge_collection(TransContext *txc, + CollectionRef *c, + CollectionRef& d, + unsigned bits); + + void _collect_allocation_stats(uint64_t need, uint32_t alloc_size, + size_t extents); + void _record_allocation_stats(); +private: + uint64_t probe_count = 0; + std::atomic<uint64_t> alloc_stats_count = {0}; + std::atomic<uint64_t> alloc_stats_fragments = { 0 }; + std::atomic<uint64_t> alloc_stats_size = { 0 }; + // + std::array<std::tuple<uint64_t, uint64_t, uint64_t>, 5> alloc_stats_history = + { std::make_tuple(0ul, 0ul, 0ul) }; + + inline bool _use_rotational_settings(); + +public: + typedef btree::btree_set< + uint64_t, std::less<uint64_t>, + mempool::bluestore_fsck::pool_allocator<uint64_t>> uint64_t_btree_t; + + struct FSCK_ObjectCtx { + int64_t& errors; + int64_t& warnings; + uint64_t& num_objects; + uint64_t& num_extents; + uint64_t& num_blobs; + uint64_t& num_sharded_objects; + uint64_t& num_spanning_blobs; + + mempool_dynamic_bitset* used_blocks; + uint64_t_btree_t* used_omap_head; + + ceph::mutex* sb_info_lock; + sb_info_space_efficient_map_t& sb_info; + // approximate amount of references per <shared blob, chunk> + shared_blob_2hash_tracker_t& sb_ref_counts; + + store_statfs_t& expected_store_statfs; + per_pool_statfs& expected_pool_statfs; + BlueStoreRepairer* repairer; + + FSCK_ObjectCtx(int64_t& e, + int64_t& w, + uint64_t& _num_objects, + uint64_t& _num_extents, + uint64_t& _num_blobs, + uint64_t& _num_sharded_objects, + uint64_t& _num_spanning_blobs, + mempool_dynamic_bitset* _ub, + uint64_t_btree_t* _used_omap_head, + + ceph::mutex* _sb_info_lock, + sb_info_space_efficient_map_t& _sb_info, + shared_blob_2hash_tracker_t& _sb_ref_counts, + store_statfs_t& _store_statfs, + per_pool_statfs& _pool_statfs, + BlueStoreRepairer* _repairer) : + errors(e), + warnings(w), + num_objects(_num_objects), + num_extents(_num_extents), + num_blobs(_num_blobs), + num_sharded_objects(_num_sharded_objects), + num_spanning_blobs(_num_spanning_blobs), + used_blocks(_ub), + used_omap_head(_used_omap_head), + sb_info_lock(_sb_info_lock), + sb_info(_sb_info), + sb_ref_counts(_sb_ref_counts), + expected_store_statfs(_store_statfs), + expected_pool_statfs(_pool_statfs), + repairer(_repairer) { + } + }; + + OnodeRef fsck_check_objects_shallow( + FSCKDepth depth, + int64_t pool_id, + CollectionRef c, + const ghobject_t& oid, + const std::string& key, + const ceph::buffer::list& value, + mempool::bluestore_fsck::list<std::string>* expecting_shards, + std::map<BlobRef, bluestore_blob_t::unused_t>* referenced, + const BlueStore::FSCK_ObjectCtx& ctx); + +private: + void _fsck_check_object_omap(FSCKDepth depth, + OnodeRef& o, + const BlueStore::FSCK_ObjectCtx& ctx); + + void _fsck_check_objects(FSCKDepth depth, + FSCK_ObjectCtx& ctx); +}; + +inline std::ostream& operator<<(std::ostream& out, const BlueStore::volatile_statfs& s) { + return out + << " allocated:" + << s.values[BlueStore::volatile_statfs::STATFS_ALLOCATED] + << " stored:" + << s.values[BlueStore::volatile_statfs::STATFS_STORED] + << " compressed:" + << s.values[BlueStore::volatile_statfs::STATFS_COMPRESSED] + << " compressed_orig:" + << s.values[BlueStore::volatile_statfs::STATFS_COMPRESSED_ORIGINAL] + << " compressed_alloc:" + << s.values[BlueStore::volatile_statfs::STATFS_COMPRESSED_ALLOCATED]; +} + +static inline void intrusive_ptr_add_ref(BlueStore::Onode *o) { + o->get(); +} +static inline void intrusive_ptr_release(BlueStore::Onode *o) { + o->put(); +} + +static inline void intrusive_ptr_add_ref(BlueStore::OpSequencer *o) { + o->get(); +} +static inline void intrusive_ptr_release(BlueStore::OpSequencer *o) { + o->put(); +} + +class BlueStoreRepairer +{ + ceph::mutex lock = ceph::make_mutex("BlueStore::BlueStoreRepairer::lock"); + +public: + // to simplify future potential migration to mempools + using fsck_interval = interval_set<uint64_t>; + + // Structure to track what pextents are used for specific cid/oid. + // Similar to Bloom filter positive and false-positive matches are + // possible only. + // Maintains two lists of bloom filters for both cids and oids + // where each list entry is a BF for specific disk pextent + // The length of the extent per filter is measured on init. + // Allows to filter out 'uninteresting' pextents to speadup subsequent + // 'is_used' access. + struct StoreSpaceTracker { + const uint64_t BLOOM_FILTER_SALT_COUNT = 2; + const uint64_t BLOOM_FILTER_TABLE_SIZE = 32; // bytes per single filter + const uint64_t BLOOM_FILTER_EXPECTED_COUNT = 16; // arbitrary selected + static const uint64_t DEF_MEM_CAP = 128 * 1024 * 1024; + + typedef mempool::bluestore_fsck::vector<bloom_filter> bloom_vector; + bloom_vector collections_bfs; + bloom_vector objects_bfs; + + bool was_filtered_out = false; + uint64_t granularity = 0; // extent length for a single filter + + StoreSpaceTracker() { + } + StoreSpaceTracker(const StoreSpaceTracker& from) : + collections_bfs(from.collections_bfs), + objects_bfs(from.objects_bfs), + granularity(from.granularity) { + } + + void init(uint64_t total, + uint64_t min_alloc_size, + uint64_t mem_cap = DEF_MEM_CAP) { + ceph_assert(!granularity); // not initialized yet + ceph_assert(min_alloc_size && isp2(min_alloc_size)); + ceph_assert(mem_cap); + + total = round_up_to(total, min_alloc_size); + granularity = total * BLOOM_FILTER_TABLE_SIZE * 2 / mem_cap; + + if (!granularity) { + granularity = min_alloc_size; + } else { + granularity = round_up_to(granularity, min_alloc_size); + } + + uint64_t entries = round_up_to(total, granularity) / granularity; + collections_bfs.resize(entries, + bloom_filter(BLOOM_FILTER_SALT_COUNT, + BLOOM_FILTER_TABLE_SIZE, + 0, + BLOOM_FILTER_EXPECTED_COUNT)); + objects_bfs.resize(entries, + bloom_filter(BLOOM_FILTER_SALT_COUNT, + BLOOM_FILTER_TABLE_SIZE, + 0, + BLOOM_FILTER_EXPECTED_COUNT)); + } + inline uint32_t get_hash(const coll_t& cid) const { + return cid.hash_to_shard(1); + } + inline void set_used(uint64_t offset, uint64_t len, + const coll_t& cid, const ghobject_t& oid) { + ceph_assert(granularity); // initialized + + // can't call this func after filter_out has been applied + ceph_assert(!was_filtered_out); + if (!len) { + return; + } + auto pos = offset / granularity; + auto end_pos = (offset + len - 1) / granularity; + while (pos <= end_pos) { + collections_bfs[pos].insert(get_hash(cid)); + objects_bfs[pos].insert(oid.hobj.get_hash()); + ++pos; + } + } + // filter-out entries unrelated to the specified(broken) extents. + // 'is_used' calls are permitted after that only + size_t filter_out(const fsck_interval& extents); + + // determines if collection's present after filtering-out + inline bool is_used(const coll_t& cid) const { + ceph_assert(was_filtered_out); + for(auto& bf : collections_bfs) { + if (bf.contains(get_hash(cid))) { + return true; + } + } + return false; + } + // determines if object's present after filtering-out + inline bool is_used(const ghobject_t& oid) const { + ceph_assert(was_filtered_out); + for(auto& bf : objects_bfs) { + if (bf.contains(oid.hobj.get_hash())) { + return true; + } + } + return false; + } + // determines if collection's present before filtering-out + inline bool is_used(const coll_t& cid, uint64_t offs) const { + ceph_assert(granularity); // initialized + ceph_assert(!was_filtered_out); + auto &bf = collections_bfs[offs / granularity]; + if (bf.contains(get_hash(cid))) { + return true; + } + return false; + } + // determines if object's present before filtering-out + inline bool is_used(const ghobject_t& oid, uint64_t offs) const { + ceph_assert(granularity); // initialized + ceph_assert(!was_filtered_out); + auto &bf = objects_bfs[offs / granularity]; + if (bf.contains(oid.hobj.get_hash())) { + return true; + } + return false; + } + }; +public: + void fix_per_pool_omap(KeyValueDB *db, int); + bool remove_key(KeyValueDB *db, const std::string& prefix, const std::string& key); + bool fix_shared_blob(KeyValueDB::Transaction txn, + uint64_t sbid, + bluestore_extent_ref_map_t* ref_map, + size_t repaired = 1); + bool fix_statfs(KeyValueDB *db, const std::string& key, + const store_statfs_t& new_statfs); + + bool fix_leaked(KeyValueDB *db, + FreelistManager* fm, + uint64_t offset, uint64_t len); + bool fix_false_free(KeyValueDB *db, + FreelistManager* fm, + uint64_t offset, uint64_t len); + bool fix_spanning_blobs( + KeyValueDB* db, + std::function<void(KeyValueDB::Transaction)> f); + + bool preprocess_misreference(KeyValueDB *db); + + unsigned apply(KeyValueDB* db); + + void note_misreference(uint64_t offs, uint64_t len, bool inc_error) { + std::lock_guard l(lock); + misreferenced_extents.union_insert(offs, len); + if (inc_error) { + ++to_repair_cnt; + } + } + ////////////////////// + //In fact two methods below are the only ones in this class which are thread-safe!! + void inc_repaired(size_t n = 1) { + to_repair_cnt += n; + } + void request_compaction() { + need_compact = true; + } + ////////////////////// + + void init_space_usage_tracker( + uint64_t total_space, uint64_t lres_tracking_unit_size) + { + //NB: not for use in multithreading mode!!! + space_usage_tracker.init(total_space, lres_tracking_unit_size); + } + void set_space_used(uint64_t offset, uint64_t len, + const coll_t& cid, const ghobject_t& oid) { + std::lock_guard l(lock); + space_usage_tracker.set_used(offset, len, cid, oid); + } + inline bool is_used(const coll_t& cid) const { + //NB: not for use in multithreading mode!!! + return space_usage_tracker.is_used(cid); + } + inline bool is_used(const ghobject_t& oid) const { + //NB: not for use in multithreading mode!!! + return space_usage_tracker.is_used(oid); + } + + const fsck_interval& get_misreferences() const { + //NB: not for use in multithreading mode!!! + return misreferenced_extents; + } + KeyValueDB::Transaction get_fix_misreferences_txn() { + //NB: not for use in multithreading mode!!! + return fix_misreferences_txn; + } + +private: + std::atomic<unsigned> to_repair_cnt = { 0 }; + std::atomic<bool> need_compact = { false }; + KeyValueDB::Transaction fix_per_pool_omap_txn; + KeyValueDB::Transaction fix_fm_leaked_txn; + KeyValueDB::Transaction fix_fm_false_free_txn; + KeyValueDB::Transaction remove_key_txn; + KeyValueDB::Transaction fix_statfs_txn; + KeyValueDB::Transaction fix_shared_blob_txn; + + KeyValueDB::Transaction fix_misreferences_txn; + KeyValueDB::Transaction fix_onode_txn; + + StoreSpaceTracker space_usage_tracker; + + // non-shared extents with multiple references + fsck_interval misreferenced_extents; + +}; + +class RocksDBBlueFSVolumeSelector : public BlueFSVolumeSelector +{ + template <class T, size_t MaxX, size_t MaxY> + class matrix_2d { + T values[MaxX][MaxY]; + public: + matrix_2d() { + clear(); + } + T& at(size_t x, size_t y) { + ceph_assert(x < MaxX); + ceph_assert(y < MaxY); + + return values[x][y]; + } + size_t get_max_x() const { + return MaxX; + } + size_t get_max_y() const { + return MaxY; + } + void clear() { + memset(values, 0, sizeof(values)); + } + }; + + enum { + // use 0/nullptr as unset indication + LEVEL_FIRST = 1, + LEVEL_LOG = LEVEL_FIRST, // BlueFS log + LEVEL_WAL, + LEVEL_DB, + LEVEL_SLOW, + LEVEL_MAX + }; + // add +1 row for corresponding per-device totals + // add +1 column for per-level actual (taken from file size) total + typedef matrix_2d<uint64_t, BlueFS::MAX_BDEV + 1, LEVEL_MAX - LEVEL_FIRST + 1> per_level_per_dev_usage_t; + + per_level_per_dev_usage_t per_level_per_dev_usage; + // file count per level, add +1 to keep total file count + uint64_t per_level_files[LEVEL_MAX - LEVEL_FIRST + 1] = { 0 }; + + // Note: maximum per-device totals below might be smaller than corresponding + // perf counters by up to a single alloc unit (1M) due to superblock extent. + // The later is not accounted here. + per_level_per_dev_usage_t per_level_per_dev_max; + + uint64_t l_totals[LEVEL_MAX - LEVEL_FIRST]; + uint64_t db_avail4slow = 0; + enum { + OLD_POLICY, + USE_SOME_EXTRA + }; + +public: + RocksDBBlueFSVolumeSelector( + uint64_t _wal_total, + uint64_t _db_total, + uint64_t _slow_total, + uint64_t _level0_size, + uint64_t _level_base, + uint64_t _level_multiplier, + double reserved_factor, + uint64_t reserved, + bool new_pol) + { + l_totals[LEVEL_LOG - LEVEL_FIRST] = 0; // not used at the moment + l_totals[LEVEL_WAL - LEVEL_FIRST] = _wal_total; + l_totals[LEVEL_DB - LEVEL_FIRST] = _db_total; + l_totals[LEVEL_SLOW - LEVEL_FIRST] = _slow_total; + + if (!new_pol) { + return; + } + + // Calculating how much extra space is available at DB volume. + // Depending on the presence of explicit reserved size specification it might be either + // * DB volume size - reserved + // or + // * DB volume size - sum_max_level_size(0, L-1) - max_level_size(L) * reserved_factor + if (!reserved) { + uint64_t prev_levels = _level0_size; + uint64_t cur_level = _level_base; + uint64_t cur_threshold = 0; + do { + uint64_t next_level = cur_level * _level_multiplier; + uint64_t next_threshold = prev_levels + cur_level + next_level * reserved_factor; + if (_db_total <= next_threshold) { + db_avail4slow = cur_threshold ? _db_total - cur_threshold : 0; + break; + } else { + prev_levels += cur_level; + cur_level = next_level; + cur_threshold = next_threshold; + } + } while (true); + } else { + db_avail4slow = _db_total - reserved; + } + } + + void* get_hint_for_log() const override { + return reinterpret_cast<void*>(LEVEL_LOG); + } + void* get_hint_by_dir(std::string_view dirname) const override; + + void add_usage(void* hint, const bluefs_fnode_t& fnode) override { + if (hint == nullptr) + return; + size_t pos = (size_t)hint - LEVEL_FIRST; + for (auto& p : fnode.extents) { + auto& cur = per_level_per_dev_usage.at(p.bdev, pos); + auto& max = per_level_per_dev_max.at(p.bdev, pos); + cur += p.length; + if (cur > max) { + max = cur; + } + { + //update per-device totals + auto& cur = per_level_per_dev_usage.at(p.bdev, LEVEL_MAX - LEVEL_FIRST); + auto& max = per_level_per_dev_max.at(p.bdev, LEVEL_MAX - LEVEL_FIRST); + cur += p.length; + if (cur > max) { + max = cur; + } + } + } + { + //update per-level actual totals + auto& cur = per_level_per_dev_usage.at(BlueFS::MAX_BDEV, pos); + auto& max = per_level_per_dev_max.at(BlueFS::MAX_BDEV, pos); + cur += fnode.size; + if (cur > max) { + max = cur; + } + } + ++per_level_files[pos]; + ++per_level_files[LEVEL_MAX - LEVEL_FIRST]; + } + void sub_usage(void* hint, const bluefs_fnode_t& fnode) override { + if (hint == nullptr) + return; + size_t pos = (size_t)hint - LEVEL_FIRST; + for (auto& p : fnode.extents) { + auto& cur = per_level_per_dev_usage.at(p.bdev, pos); + ceph_assert(cur >= p.length); + cur -= p.length; + + //update per-device totals + auto& cur2 = per_level_per_dev_usage.at(p.bdev, LEVEL_MAX - LEVEL_FIRST); + ceph_assert(cur2 >= p.length); + cur2 -= p.length; + } + //update per-level actual totals + auto& cur = per_level_per_dev_usage.at(BlueFS::MAX_BDEV, pos); + ceph_assert(cur >= fnode.size); + cur -= fnode.size; + ceph_assert(per_level_files[pos] > 0); + --per_level_files[pos]; + ceph_assert(per_level_files[LEVEL_MAX - LEVEL_FIRST] > 0); + --per_level_files[LEVEL_MAX - LEVEL_FIRST]; + } + void add_usage(void* hint, uint64_t fsize) override { + if (hint == nullptr) + return; + size_t pos = (size_t)hint - LEVEL_FIRST; + //update per-level actual totals + auto& cur = per_level_per_dev_usage.at(BlueFS::MAX_BDEV, pos); + auto& max = per_level_per_dev_max.at(BlueFS::MAX_BDEV, pos); + cur += fsize; + if (cur > max) { + max = cur; + } + } + void sub_usage(void* hint, uint64_t fsize) override { + if (hint == nullptr) + return; + size_t pos = (size_t)hint - LEVEL_FIRST; + //update per-level actual totals + auto& cur = per_level_per_dev_usage.at(BlueFS::MAX_BDEV, pos); + ceph_assert(cur >= fsize); + per_level_per_dev_usage.at(BlueFS::MAX_BDEV, pos) -= fsize; + } + + uint8_t select_prefer_bdev(void* h) override; + void get_paths( + const std::string& base, + BlueFSVolumeSelector::paths& res) const override; + + void dump(std::ostream& sout) override; +}; + +#endif diff --git a/src/os/bluestore/FreelistManager.cc b/src/os/bluestore/FreelistManager.cc new file mode 100644 index 000000000..5907df443 --- /dev/null +++ b/src/os/bluestore/FreelistManager.cc @@ -0,0 +1,46 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#include "FreelistManager.h" +#include "BitmapFreelistManager.h" +#ifdef HAVE_LIBZBD +#include "ZonedFreelistManager.h" +#endif + +FreelistManager *FreelistManager::create( + CephContext* cct, + std::string type, + std::string prefix) +{ + // a bit of a hack... we hard-code the prefixes here. we need to + // put the freelistmanagers in different prefixes because the merge + // op is per prefix, has to done pre-db-open, and we don't know the + // freelist type until after we open the db. + ceph_assert(prefix == "B"); + if (type == "bitmap") + return new BitmapFreelistManager(cct, "B", "b"); + +#ifdef HAVE_LIBZBD + // With zoned drives there is only one FreelistManager implementation that we + // can use, and we also know if a drive is zoned right after opening it + // (BlueStore::_open_bdev). Hence, we set freelist_type to "zoned" whenever + // we open the device and it turns out to be is zoned. We ignore |prefix| + // passed to create and use the prefixes defined for zoned devices at the top + // of BlueStore.cc. + if (type == "zoned") + return new ZonedFreelistManager(cct, "Z", "z"); +#endif + + return NULL; +} + +void FreelistManager::setup_merge_operators(KeyValueDB *db, + const std::string& type) +{ +#ifdef HAVE_LIBZBD + if (type == "zoned") + ZonedFreelistManager::setup_merge_operator(db, "z"); + else +#endif + BitmapFreelistManager::setup_merge_operator(db, "b"); +} diff --git a/src/os/bluestore/FreelistManager.h b/src/os/bluestore/FreelistManager.h new file mode 100644 index 000000000..1aaff89ea --- /dev/null +++ b/src/os/bluestore/FreelistManager.h @@ -0,0 +1,61 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#ifndef CEPH_OS_BLUESTORE_FREELISTMANAGER_H +#define CEPH_OS_BLUESTORE_FREELISTMANAGER_H + +#include <string> +#include <vector> +#include <mutex> +#include <ostream> +#include "kv/KeyValueDB.h" +#include "bluestore_types.h" +#include "zoned_types.h" + +class FreelistManager { +public: + CephContext* cct; + FreelistManager(CephContext* cct) : cct(cct) {} + virtual ~FreelistManager() {} + + static FreelistManager *create( + CephContext* cct, + std::string type, + std::string prefix); + + static void setup_merge_operators(KeyValueDB *db, const std::string &type); + + virtual int create(uint64_t size, uint64_t granularity, + KeyValueDB::Transaction txn) = 0; + + virtual int init(KeyValueDB *kvdb, bool db_in_read_only, + std::function<int(const std::string&, std::string*)> cfg_reader) = 0; + virtual void sync(KeyValueDB* kvdb) = 0; + virtual void shutdown() = 0; + + virtual void dump(KeyValueDB *kvdb) = 0; + + virtual void enumerate_reset() = 0; + virtual bool enumerate_next(KeyValueDB *kvdb, uint64_t *offset, uint64_t *length) = 0; + + virtual void allocate( + uint64_t offset, uint64_t length, + KeyValueDB::Transaction txn) = 0; + virtual void release( + uint64_t offset, uint64_t length, + KeyValueDB::Transaction txn) = 0; + + virtual uint64_t get_size() const = 0; + virtual uint64_t get_alloc_units() const = 0; + virtual uint64_t get_alloc_size() const = 0; + + virtual void get_meta(uint64_t target_size, + std::vector<std::pair<string, string>>*) const = 0; + + virtual std::vector<zone_state_t> get_zone_states(KeyValueDB *kvdb) const { + return {}; + } +}; + + +#endif diff --git a/src/os/bluestore/HybridAllocator.cc b/src/os/bluestore/HybridAllocator.cc new file mode 100644 index 000000000..b78a99ffe --- /dev/null +++ b/src/os/bluestore/HybridAllocator.cc @@ -0,0 +1,226 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#include "HybridAllocator.h" + +#include <limits> + +#include "common/config_proxy.h" +#include "common/debug.h" + +#define dout_context cct +#define dout_subsys ceph_subsys_bluestore +#undef dout_prefix +#define dout_prefix *_dout << "HybridAllocator " + + +int64_t HybridAllocator::allocate( + uint64_t want, + uint64_t unit, + uint64_t max_alloc_size, + int64_t hint, + PExtentVector* extents) +{ + ldout(cct, 10) << __func__ << std::hex + << " want 0x" << want + << " unit 0x" << unit + << " max_alloc_size 0x" << max_alloc_size + << " hint 0x" << hint + << std::dec << dendl; + ceph_assert(isp2(unit)); + ceph_assert(want % unit == 0); + + if (max_alloc_size == 0) { + max_alloc_size = want; + } + if (constexpr auto cap = std::numeric_limits<decltype(bluestore_pextent_t::length)>::max(); + max_alloc_size >= cap) { + max_alloc_size = p2align(uint64_t(cap), (uint64_t)get_block_size()); + } + + std::lock_guard l(lock); + + int64_t res; + PExtentVector local_extents; + + // preserve original 'extents' vector state + auto orig_size = extents->size(); + auto orig_pos = extents->end(); + if (orig_size) { + --orig_pos; + } + + // try bitmap first to avoid unneeded contiguous extents split if + // desired amount is less than shortes range in AVL + if (bmap_alloc && bmap_alloc->get_free() && + want < _lowest_size_available()) { + res = bmap_alloc->allocate(want, unit, max_alloc_size, hint, extents); + if (res < 0) { + // got a failure, release already allocated and + // start over allocation from avl + if (orig_size) { + local_extents.insert( + local_extents.end(), ++orig_pos, extents->end()); + extents->resize(orig_size); + } else { + extents->swap(local_extents); + } + bmap_alloc->release(local_extents); + res = 0; + } + if ((uint64_t)res < want) { + auto res2 = _allocate(want - res, unit, max_alloc_size, hint, extents); + if (res2 < 0) { + res = res2; // caller to do the release + } else { + res += res2; + } + } + } else { + res = _allocate(want, unit, max_alloc_size, hint, extents); + if (res < 0) { + // got a failure, release already allocated and + // start over allocation from bitmap + if (orig_size) { + local_extents.insert( + local_extents.end(), ++orig_pos, extents->end()); + extents->resize(orig_size); + } else { + extents->swap(local_extents); + } + _release(local_extents); + res = 0; + } + if ((uint64_t)res < want ) { + auto res2 = bmap_alloc ? + bmap_alloc->allocate(want - res, unit, max_alloc_size, hint, extents) : + 0; + if (res2 < 0 ) { + res = res2; // caller to do the release + } else { + res += res2; + } + } + } + return res ? res : -ENOSPC; +} + +void HybridAllocator::release(const interval_set<uint64_t>& release_set) { + std::lock_guard l(lock); + // this will attempt to put free ranges into AvlAllocator first and + // fallback to bitmap one via _try_insert_range call + _release(release_set); +} + +uint64_t HybridAllocator::get_free() +{ + std::lock_guard l(lock); + return (bmap_alloc ? bmap_alloc->get_free() : 0) + _get_free(); +} + +double HybridAllocator::get_fragmentation() +{ + std::lock_guard l(lock); + auto f = AvlAllocator::_get_fragmentation(); + auto bmap_free = bmap_alloc ? bmap_alloc->get_free() : 0; + if (bmap_free) { + auto _free = _get_free() + bmap_free; + auto bf = bmap_alloc->get_fragmentation(); + + f = f * _get_free() / _free + bf * bmap_free / _free; + } + return f; +} + +void HybridAllocator::dump() +{ + std::lock_guard l(lock); + AvlAllocator::_dump(); + if (bmap_alloc) { + bmap_alloc->dump(); + } + ldout(cct, 0) << __func__ + << " avl_free: " << _get_free() + << " bmap_free: " << (bmap_alloc ? bmap_alloc->get_free() : 0) + << dendl; +} + +void HybridAllocator::foreach( + std::function<void(uint64_t offset, uint64_t length)> notify) +{ + std::lock_guard l(lock); + AvlAllocator::_foreach(notify); + if (bmap_alloc) { + bmap_alloc->foreach(notify); + } +} + +void HybridAllocator::init_rm_free(uint64_t offset, uint64_t length) +{ + if (!length) + return; + std::lock_guard l(lock); + ldout(cct, 10) << __func__ << std::hex + << " offset 0x" << offset + << " length 0x" << length + << std::dec << dendl; + _try_remove_from_tree(offset, length, + [&](uint64_t o, uint64_t l, bool found) { + if (!found) { + if (bmap_alloc) { + bmap_alloc->init_rm_free(o, l); + } else { + lderr(cct) << "init_rm_free lambda" << std::hex + << "Uexpected extent: " + << " 0x" << o << "~" << l + << std::dec << dendl; + ceph_assert(false); + } + } + }); +} + +void HybridAllocator::shutdown() +{ + std::lock_guard l(lock); + _shutdown(); + if (bmap_alloc) { + bmap_alloc->shutdown(); + delete bmap_alloc; + bmap_alloc = nullptr; + } +} + +void HybridAllocator::_spillover_range(uint64_t start, uint64_t end) +{ + auto size = end - start; + dout(20) << __func__ + << std::hex << " " + << start << "~" << size + << std::dec + << dendl; + ceph_assert(size); + if (!bmap_alloc) { + dout(1) << __func__ + << std::hex + << " constructing fallback allocator" + << dendl; + bmap_alloc = new BitmapAllocator(cct, + get_capacity(), + get_block_size(), + get_name() + ".fallback"); + } + bmap_alloc->init_add_free(start, size); +} + +void HybridAllocator::_add_to_tree(uint64_t start, uint64_t size) +{ + if (bmap_alloc) { + uint64_t head = bmap_alloc->claim_free_to_left(start); + uint64_t tail = bmap_alloc->claim_free_to_right(start + size); + ceph_assert(head <= start); + start -= head; + size += head + tail; + } + AvlAllocator::_add_to_tree(start, size); +} diff --git a/src/os/bluestore/HybridAllocator.h b/src/os/bluestore/HybridAllocator.h new file mode 100644 index 000000000..d60fc1a31 --- /dev/null +++ b/src/os/bluestore/HybridAllocator.h @@ -0,0 +1,53 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#pragma once + +#include <mutex> + +#include "AvlAllocator.h" +#include "BitmapAllocator.h" + +class HybridAllocator : public AvlAllocator { + BitmapAllocator* bmap_alloc = nullptr; +public: + HybridAllocator(CephContext* cct, int64_t device_size, int64_t _block_size, + uint64_t max_mem, + const std::string& name) : + AvlAllocator(cct, device_size, _block_size, max_mem, name) { + } + const char* get_type() const override + { + return "hybrid"; + } + int64_t allocate( + uint64_t want, + uint64_t unit, + uint64_t max_alloc_size, + int64_t hint, + PExtentVector *extents) override; + void release(const interval_set<uint64_t>& release_set) override; + uint64_t get_free() override; + double get_fragmentation() override; + + void dump() override; + void foreach( + std::function<void(uint64_t offset, uint64_t length)> notify) override; + void init_rm_free(uint64_t offset, uint64_t length) override; + void shutdown() override; + +protected: + // intended primarily for UT + BitmapAllocator* get_bmap() { + return bmap_alloc; + } + const BitmapAllocator* get_bmap() const { + return bmap_alloc; + } +private: + + void _spillover_range(uint64_t start, uint64_t end) override; + + // called when extent to be released/marked free + void _add_to_tree(uint64_t start, uint64_t size) override; +}; diff --git a/src/os/bluestore/StupidAllocator.cc b/src/os/bluestore/StupidAllocator.cc new file mode 100644 index 000000000..805a51fb0 --- /dev/null +++ b/src/os/bluestore/StupidAllocator.cc @@ -0,0 +1,371 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#include "StupidAllocator.h" +#include "bluestore_types.h" +#include "common/debug.h" + +#define dout_context cct +#define dout_subsys ceph_subsys_bluestore +#undef dout_prefix +#define dout_prefix *_dout << "stupidalloc 0x" << this << " " + +StupidAllocator::StupidAllocator(CephContext* cct, + const std::string& name, + int64_t _size, + int64_t _block_size) + : Allocator(name, _size, _block_size), cct(cct), num_free(0), + free(10) +{ + ceph_assert(cct != nullptr); + bdev_block_size = cct->_conf->bdev_block_size; +} + +StupidAllocator::~StupidAllocator() +{ +} + +unsigned StupidAllocator::_choose_bin(uint64_t orig_len) +{ + ceph_assert(bdev_block_size > 0); + uint64_t len = orig_len / bdev_block_size; + int bin = std::min((int)cbits(len), (int)free.size() - 1); + ldout(cct, 30) << __func__ << " len 0x" << std::hex << orig_len + << std::dec << " -> " << bin << dendl; + return bin; +} + +void StupidAllocator::_insert_free(uint64_t off, uint64_t len) +{ + unsigned bin = _choose_bin(len); + ldout(cct, 30) << __func__ << " 0x" << std::hex << off << "~" << len + << std::dec << " in bin " << bin << dendl; + while (true) { + free[bin].insert(off, len, &off, &len); + unsigned newbin = _choose_bin(len); + if (newbin == bin) + break; + ldout(cct, 30) << __func__ << " promoting 0x" << std::hex << off << "~" << len + << std::dec << " to bin " << newbin << dendl; + free[bin].erase(off, len); + bin = newbin; + } +} + +/// return the effective length of the extent if we align to alloc_unit +uint64_t StupidAllocator::_aligned_len( + StupidAllocator::interval_set_t::iterator p, + uint64_t alloc_unit) +{ + uint64_t skew = p.get_start() % alloc_unit; + if (skew) + skew = alloc_unit - skew; + if (skew > p.get_len()) + return 0; + else + return p.get_len() - skew; +} + +int64_t StupidAllocator::allocate_int( + uint64_t want_size, uint64_t alloc_unit, int64_t hint, + uint64_t *offset, uint32_t *length) +{ + std::lock_guard l(lock); + ldout(cct, 10) << __func__ << " want_size 0x" << std::hex << want_size + << " alloc_unit 0x" << alloc_unit + << " hint 0x" << hint << std::dec + << dendl; + uint64_t want = std::max(alloc_unit, want_size); + int bin = _choose_bin(want); + int orig_bin = bin; + + auto p = free[0].begin(); + + if (!hint) + hint = last_alloc; + + // search up (from hint) + if (hint) { + for (bin = orig_bin; bin < (int)free.size(); ++bin) { + p = free[bin].lower_bound(hint); + while (p != free[bin].end()) { + if (_aligned_len(p, alloc_unit) >= want_size) { + goto found; + } + ++p; + } + } + } + + // search up (from origin, and skip searched extents by hint) + for (bin = orig_bin; bin < (int)free.size(); ++bin) { + p = free[bin].begin(); + auto end = hint ? free[bin].lower_bound(hint) : free[bin].end(); + while (p != end) { + if (_aligned_len(p, alloc_unit) >= want_size) { + goto found; + } + ++p; + } + } + + // search down (hint) + if (hint) { + for (bin = orig_bin; bin >= 0; --bin) { + p = free[bin].lower_bound(hint); + while (p != free[bin].end()) { + if (_aligned_len(p, alloc_unit) >= alloc_unit) { + goto found; + } + ++p; + } + } + } + + // search down (from origin, and skip searched extents by hint) + for (bin = orig_bin; bin >= 0; --bin) { + p = free[bin].begin(); + auto end = hint ? free[bin].lower_bound(hint) : free[bin].end(); + while (p != end) { + if (_aligned_len(p, alloc_unit) >= alloc_unit) { + goto found; + } + ++p; + } + } + + return -ENOSPC; + + found: + uint64_t skew = p.get_start() % alloc_unit; + if (skew) + skew = alloc_unit - skew; + *offset = p.get_start() + skew; + *length = std::min(std::max(alloc_unit, want_size), p2align((p.get_len() - skew), alloc_unit)); + if (cct->_conf->bluestore_debug_small_allocations) { + uint64_t max = + alloc_unit * (rand() % cct->_conf->bluestore_debug_small_allocations); + if (max && *length > max) { + ldout(cct, 10) << __func__ << " shortening allocation of 0x" << std::hex + << *length << " -> 0x" + << max << " due to debug_small_allocations" << std::dec + << dendl; + *length = max; + } + } + ldout(cct, 30) << __func__ << " got 0x" << std::hex << *offset << "~" << *length + << " from bin " << std::dec << bin << dendl; + + free[bin].erase(*offset, *length); + uint64_t off, len; + if (*offset && free[bin].contains(*offset - skew - 1, &off, &len)) { + int newbin = _choose_bin(len); + if (newbin != bin) { + ldout(cct, 30) << __func__ << " demoting 0x" << std::hex << off << "~" << len + << std::dec << " to bin " << newbin << dendl; + free[bin].erase(off, len); + _insert_free(off, len); + } + } + if (free[bin].contains(*offset + *length, &off, &len)) { + int newbin = _choose_bin(len); + if (newbin != bin) { + ldout(cct, 30) << __func__ << " demoting 0x" << std::hex << off << "~" << len + << std::dec << " to bin " << newbin << dendl; + free[bin].erase(off, len); + _insert_free(off, len); + } + } + + num_free -= *length; + ceph_assert(num_free >= 0); + last_alloc = *offset + *length; + return 0; +} + +int64_t StupidAllocator::allocate( + uint64_t want_size, + uint64_t alloc_unit, + uint64_t max_alloc_size, + int64_t hint, + PExtentVector *extents) +{ + uint64_t allocated_size = 0; + uint64_t offset = 0; + uint32_t length = 0; + int res = 0; + + if (max_alloc_size == 0) { + max_alloc_size = want_size; + } + // cap with 32-bit val + max_alloc_size = std::min(max_alloc_size, 0x10000000 - alloc_unit); + + while (allocated_size < want_size) { + res = allocate_int(std::min(max_alloc_size, (want_size - allocated_size)), + alloc_unit, hint, &offset, &length); + if (res != 0) { + /* + * Allocation failed. + */ + break; + } + bool can_append = true; + if (!extents->empty()) { + bluestore_pextent_t &last_extent = extents->back(); + if (last_extent.end() == offset) { + uint64_t l64 = last_extent.length; + l64 += length; + if (l64 < 0x100000000 && l64 <= max_alloc_size) { + can_append = false; + last_extent.length += length; + } + } + } + if (can_append) { + extents->emplace_back(bluestore_pextent_t(offset, length)); + } + + allocated_size += length; + hint = offset + length; + } + + if (allocated_size == 0) { + return -ENOSPC; + } + return allocated_size; +} + +void StupidAllocator::release( + const interval_set<uint64_t>& release_set) +{ + std::lock_guard l(lock); + for (interval_set<uint64_t>::const_iterator p = release_set.begin(); + p != release_set.end(); + ++p) { + const auto offset = p.get_start(); + const auto length = p.get_len(); + ldout(cct, 10) << __func__ << " 0x" << std::hex << offset << "~" << length + << std::dec << dendl; + _insert_free(offset, length); + num_free += length; + } +} + +uint64_t StupidAllocator::get_free() +{ + std::lock_guard l(lock); + return num_free; +} + +double StupidAllocator::get_fragmentation() +{ + ceph_assert(get_block_size()); + double res; + uint64_t max_intervals = 0; + uint64_t intervals = 0; + { + std::lock_guard l(lock); + max_intervals = p2roundup<uint64_t>(num_free, + get_block_size()) / get_block_size(); + for (unsigned bin = 0; bin < free.size(); ++bin) { + intervals += free[bin].num_intervals(); + } + } + ldout(cct, 30) << __func__ << " " << intervals << "/" << max_intervals + << dendl; + ceph_assert(intervals <= max_intervals); + if (!intervals || max_intervals <= 1) { + return 0.0; + } + intervals--; + max_intervals--; + res = (double)intervals / max_intervals; + return res; +} + +void StupidAllocator::dump() +{ + std::lock_guard l(lock); + for (unsigned bin = 0; bin < free.size(); ++bin) { + ldout(cct, 0) << __func__ << " free bin " << bin << ": " + << free[bin].num_intervals() << " extents" << dendl; + for (auto p = free[bin].begin(); + p != free[bin].end(); + ++p) { + ldout(cct, 0) << __func__ << " 0x" << std::hex << p.get_start() << "~" + << p.get_len() << std::dec << dendl; + } + } +} + +void StupidAllocator::foreach(std::function<void(uint64_t offset, uint64_t length)> notify) +{ + std::lock_guard l(lock); + for (unsigned bin = 0; bin < free.size(); ++bin) { + for (auto p = free[bin].begin(); p != free[bin].end(); ++p) { + notify(p.get_start(), p.get_len()); + } + } +} + +void StupidAllocator::init_add_free(uint64_t offset, uint64_t length) +{ + if (!length) + return; + std::lock_guard l(lock); + ldout(cct, 10) << __func__ << " 0x" << std::hex << offset << "~" << length + << std::dec << dendl; + _insert_free(offset, length); + num_free += length; +} + +void StupidAllocator::init_rm_free(uint64_t offset, uint64_t length) +{ + if (!length) + return; + std::lock_guard l(lock); + ldout(cct, 10) << __func__ << " 0x" << std::hex << offset << "~" << length + << std::dec << dendl; + interval_set_t rm; + rm.insert(offset, length); + for (unsigned i = 0; i < free.size() && !rm.empty(); ++i) { + interval_set_t overlap; + overlap.intersection_of(rm, free[i]); + if (!overlap.empty()) { + ldout(cct, 20) << __func__ << " bin " << i << " rm 0x" << std::hex << overlap + << std::dec << dendl; + auto it = overlap.begin(); + auto it_end = overlap.end(); + while (it != it_end) { + auto o = it.get_start(); + auto l = it.get_len(); + + free[i].erase(o, l, + [&](uint64_t off, uint64_t len) { + unsigned newbin = _choose_bin(len); + if (newbin != i) { + ldout(cct, 30) << __func__ << " demoting1 0x" << std::hex << off << "~" << len + << std::dec << " to bin " << newbin << dendl; + _insert_free(off, len); + return true; + } + return false; + }); + ++it; + } + + rm.subtract(overlap); + } + } + ceph_assert(rm.empty()); + num_free -= length; + ceph_assert(num_free >= 0); +} + + +void StupidAllocator::shutdown() +{ + ldout(cct, 1) << __func__ << dendl; +} + diff --git a/src/os/bluestore/StupidAllocator.h b/src/os/bluestore/StupidAllocator.h new file mode 100644 index 000000000..e1fc101e0 --- /dev/null +++ b/src/os/bluestore/StupidAllocator.h @@ -0,0 +1,73 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#ifndef CEPH_OS_BLUESTORE_STUPIDALLOCATOR_H +#define CEPH_OS_BLUESTORE_STUPIDALLOCATOR_H + +#include <mutex> + +#include "Allocator.h" +#include "include/btree_map.h" +#include "include/interval_set.h" +#include "os/bluestore/bluestore_types.h" +#include "include/mempool.h" +#include "common/ceph_mutex.h" + +class StupidAllocator : public Allocator { + CephContext* cct; + ceph::mutex lock = ceph::make_mutex("StupidAllocator::lock"); + + int64_t num_free; ///< total bytes in freelist + uint64_t bdev_block_size; + + template <typename K, typename V> using allocator_t = + mempool::bluestore_alloc::pool_allocator<std::pair<const K, V>>; + template <typename K, typename V> using btree_map_t = + btree::btree_map<K, V, std::less<K>, allocator_t<K, V>>; + using interval_set_t = interval_set<uint64_t, btree_map_t>; + std::vector<interval_set_t> free; ///< leading-edge copy + + uint64_t last_alloc = 0; + + unsigned _choose_bin(uint64_t len); + void _insert_free(uint64_t offset, uint64_t len); + + uint64_t _aligned_len( + interval_set_t::iterator p, + uint64_t alloc_unit); + +public: + StupidAllocator(CephContext* cct, + const std::string& name, + int64_t size, + int64_t block_size); + ~StupidAllocator() override; + const char* get_type() const override + { + return "stupid"; + } + + int64_t allocate( + uint64_t want_size, uint64_t alloc_unit, uint64_t max_alloc_size, + int64_t hint, PExtentVector *extents) override; + + int64_t allocate_int( + uint64_t want_size, uint64_t alloc_unit, int64_t hint, + uint64_t *offset, uint32_t *length); + + void release( + const interval_set<uint64_t>& release_set) override; + + uint64_t get_free() override; + double get_fragmentation() override; + + void dump() override; + void foreach(std::function<void(uint64_t offset, uint64_t length)> notify) override; + + void init_add_free(uint64_t offset, uint64_t length) override; + void init_rm_free(uint64_t offset, uint64_t length) override; + + void shutdown() override; +}; + +#endif diff --git a/src/os/bluestore/ZonedAllocator.cc b/src/os/bluestore/ZonedAllocator.cc new file mode 100644 index 000000000..71f0e6e89 --- /dev/null +++ b/src/os/bluestore/ZonedAllocator.cc @@ -0,0 +1,176 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +// +// A simple allocator that just hands out space from the next empty zone. This +// is temporary, just to get the simplest append-only write workload to work. +// +// Copyright (C) 2020 Abutalib Aghayev +// + +#include "ZonedAllocator.h" +#include "bluestore_types.h" +#include "zoned_types.h" +#include "common/debug.h" + +#define dout_context cct +#define dout_subsys ceph_subsys_bluestore +#undef dout_prefix +#define dout_prefix *_dout << "ZonedAllocator " << this << " " + +ZonedAllocator::ZonedAllocator(CephContext* cct, + int64_t size, + int64_t block_size, + const std::string& name) + : Allocator(name, size, block_size), + cct(cct), + num_free(0), + size(size), + // To avoid interface changes, we piggyback zone size and the first + // sequential zone number onto the first 32 bits of 64-bit |block_size|. + // The last 32 bits of |block_size| is holding the actual block size. + block_size((block_size & 0x00000000ffffffff)), + zone_size(((block_size & 0x0000ffff00000000) >> 32) * 1024 * 1024), + starting_zone_num((block_size & 0xffff000000000000) >> 48), + num_zones(size / zone_size) { + ldout(cct, 10) << __func__ << " size 0x" << std::hex << size + << " zone size 0x" << zone_size << std::dec + << " number of zones " << num_zones + << " first sequential zone " << starting_zone_num + << dendl; + ceph_assert(size % zone_size == 0); +} + +ZonedAllocator::~ZonedAllocator() {} + +int64_t ZonedAllocator::allocate( + uint64_t want_size, + uint64_t alloc_unit, + uint64_t max_alloc_size, + int64_t hint, + PExtentVector *extents) { + std::lock_guard l(lock); + + ceph_assert(want_size % 4096 == 0); + + ldout(cct, 10) << __func__ << " trying to allocate " + << std::hex << want_size << dendl; + + uint64_t zone_num = starting_zone_num; + for ( ; zone_num < num_zones; ++zone_num) { + if (fits(want_size, zone_num)) { + break; + } + ldout(cct, 10) << __func__ << " skipping zone " << zone_num + << " because there is not enough space: " + << " want_size = " << want_size + << " available = " << get_remaining_space(zone_num) + << dendl; + } + + if (zone_num == num_zones) { + ldout(cct, 10) << __func__ << " failed to allocate" << dendl; + return -ENOSPC; + } + + uint64_t offset = get_offset(zone_num); + + ldout(cct, 10) << __func__ << " advancing zone " << std::hex + << zone_num << " write pointer from " << offset + << " to " << offset + want_size << dendl; + + advance_write_pointer(zone_num, want_size); + if (get_remaining_space(zone_num) == 0) { + starting_zone_num = zone_num + 1; + } + + ldout(cct, 10) << __func__ << std::hex << " zone " << zone_num + << " offset is now " << get_write_pointer(zone_num) << dendl; + + ldout(cct, 10) << __func__ << " allocated " << std::hex << want_size + << " bytes at offset " << offset + << " located at zone " << zone_num + << " and zone offset " << offset % zone_size << dendl; + + extents->emplace_back(bluestore_pextent_t(offset, want_size)); + return want_size; +} + +void ZonedAllocator::release(const interval_set<uint64_t>& release_set) { + std::lock_guard l(lock); +} + +uint64_t ZonedAllocator::get_free() { + return num_free; +} + +void ZonedAllocator::dump() { + std::lock_guard l(lock); +} + +void ZonedAllocator::foreach( + std::function<void(uint64_t offset, uint64_t length)> notify) +{ + std::lock_guard l(lock); +} + +// This just increments |num_free|. The actual free space is added by +// set_zone_states, as it updates the write pointer for each zone. +void ZonedAllocator::init_add_free(uint64_t offset, uint64_t length) { + ldout(cct, 40) << __func__ << " " << std::hex + << offset << "~" << length << dendl; + + num_free += length; +} + +void ZonedAllocator::init_rm_free(uint64_t offset, uint64_t length) { + std::lock_guard l(lock); + ldout(cct, 40) << __func__ << " 0x" << std::hex + << offset << "~" << length << dendl; + + num_free -= length; + ceph_assert(num_free >= 0); + + uint64_t zone_num = offset / zone_size; + uint64_t write_pointer = offset % zone_size; + uint64_t remaining_space = get_remaining_space(zone_num); + + ceph_assert(get_write_pointer(zone_num) == write_pointer); + ceph_assert(remaining_space <= length); + advance_write_pointer(zone_num, remaining_space); + + ldout(cct, 40) << __func__ << " set zone 0x" << std::hex + << zone_num << " write pointer to 0x" << zone_size << dendl; + + length -= remaining_space; + ceph_assert(length % zone_size == 0); + + for ( ; length; length -= zone_size) { + advance_write_pointer(++zone_num, zone_size); + ldout(cct, 40) << __func__ << " set zone 0x" << std::hex + << zone_num << " write pointer to 0x" << zone_size << dendl; + } +} + +bool ZonedAllocator::zoned_get_zones_to_clean(std::deque<uint64_t> *zones_to_clean) { + // TODO: make 0.25 tunable + if (static_cast<double>(num_free) / size > 0.25) { + return false; + } + { + std::lock_guard l(lock); + // TODO: populate |zones_to_clean| with the numbers of zones that should be + // cleaned. + } + return true; +} + +void ZonedAllocator::zoned_set_zone_states(std::vector<zone_state_t> &&_zone_states) { + std::lock_guard l(lock); + ldout(cct, 10) << __func__ << dendl; + zone_states = std::move(_zone_states); +} + +void ZonedAllocator::shutdown() { + ldout(cct, 1) << __func__ << dendl; +} diff --git a/src/os/bluestore/ZonedAllocator.h b/src/os/bluestore/ZonedAllocator.h new file mode 100644 index 000000000..47cb46be7 --- /dev/null +++ b/src/os/bluestore/ZonedAllocator.h @@ -0,0 +1,91 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +// +// A simple allocator that just hands out space from the next empty zone. This +// is temporary, just to get the simplest append-only write workload to work. +// +// Copyright (C) 2020 Abutalib Aghayev +// + +#ifndef CEPH_OS_BLUESTORE_ZONEDALLOCATOR_H +#define CEPH_OS_BLUESTORE_ZONEDALLOCATOR_H + +#include <mutex> + +#include "Allocator.h" +#include "common/ceph_mutex.h" +#include "include/btree_map.h" +#include "include/interval_set.h" +#include "include/mempool.h" +#include "bluestore_types.h" +#include "zoned_types.h" + +class ZonedAllocator : public Allocator { + CephContext* cct; + + // Currently only one thread at a time calls into ZonedAllocator due to + // atomic_alloc_and_submit_lock in BlueStore.cc, but we do locking anyway + // because eventually ZONE_APPEND support will land and + // atomic_alloc_and_submit_lock will be removed. + ceph::mutex lock = ceph::make_mutex("ZonedAllocator::lock"); + + std::atomic<int64_t> num_free; ///< total bytes in freelist + uint64_t size; + uint64_t block_size; + uint64_t zone_size; + uint64_t starting_zone_num; + uint64_t num_zones; + std::vector<zone_state_t> zone_states; + + inline uint64_t get_offset(uint64_t zone_num) const { + return zone_num * zone_size + get_write_pointer(zone_num); + } + + inline uint64_t get_write_pointer(uint64_t zone_num) const { + return zone_states[zone_num].get_write_pointer(); + } + + inline uint64_t get_remaining_space(uint64_t zone_num) const { + return zone_size - get_write_pointer(zone_num); + } + + inline void advance_write_pointer(uint64_t zone_num, uint64_t want_size) { + zone_states[zone_num].increment_write_pointer(want_size); + } + + inline bool fits(uint64_t want_size, uint64_t zone_num) const { + return want_size <= get_remaining_space(zone_num); + } + +public: + ZonedAllocator(CephContext* cct, int64_t size, int64_t block_size, + const std::string& name); + ~ZonedAllocator() override; + + const char *get_type() const override { + return "zoned"; + } + + int64_t allocate( + uint64_t want_size, uint64_t alloc_unit, uint64_t max_alloc_size, + int64_t hint, PExtentVector *extents) override; + + void release(const interval_set<uint64_t>& release_set) override; + + uint64_t get_free() override; + + void dump() override; + void foreach( + std::function<void(uint64_t offset, uint64_t length)> notify) override; + + void zoned_set_zone_states(std::vector<zone_state_t> &&_zone_states) override; + bool zoned_get_zones_to_clean(std::deque<uint64_t> *zones_to_clean) override; + + void init_add_free(uint64_t offset, uint64_t length) override; + void init_rm_free(uint64_t offset, uint64_t length) override; + + void shutdown() override; +}; + +#endif diff --git a/src/os/bluestore/ZonedFreelistManager.cc b/src/os/bluestore/ZonedFreelistManager.cc new file mode 100644 index 000000000..b135ee524 --- /dev/null +++ b/src/os/bluestore/ZonedFreelistManager.cc @@ -0,0 +1,315 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +// +// A freelist manager for zoned devices. This iteration just keeps the write +// pointer per zone. Following iterations will add enough information to enable +// cleaning of zones. +// +// Copyright (C) 2020 Abutalib Aghayev +// + +#include "ZonedFreelistManager.h" +#include "bluestore_common.h" +#include "include/stringify.h" +#include "kv/KeyValueDB.h" +#include "os/kv.h" +#include "zoned_types.h" + +#include "common/debug.h" + +#define dout_context cct +#define dout_subsys ceph_subsys_bluestore +#undef dout_prefix +#define dout_prefix *_dout << "zoned freelist " + +using std::string; + +using ceph::bufferlist; +using ceph::bufferptr; +using ceph::decode; +using ceph::encode; + +void ZonedFreelistManager::write_zone_state_to_db( + uint64_t zone_num, + const zone_state_t &zone_state, + KeyValueDB::Transaction txn) { + string key; + _key_encode_u64(zone_num, &key); + bufferlist bl; + zone_state.encode(bl); + txn->merge(info_prefix, key, bl); +} + +void ZonedFreelistManager::load_zone_state_from_db( + uint64_t zone_num, + zone_state_t &zone_state, + KeyValueDB::Iterator& it) const { + string k = it->key(); + uint64_t zone_num_from_db; + _key_decode_u64(k.c_str(), &zone_num_from_db); + ceph_assert(zone_num_from_db == zone_num); + + bufferlist bl = it->value(); + auto p = bl.cbegin(); + zone_state.decode(p); +} + +void ZonedFreelistManager::init_zone_states(KeyValueDB::Transaction txn) { + dout(10) << __func__ << dendl; + for (uint64_t zone_num = 0; zone_num < num_zones; ++zone_num) { + zone_state_t zone_state; + write_zone_state_to_db(zone_num, zone_state, txn); + } +} + +void ZonedFreelistManager::setup_merge_operator(KeyValueDB *db, string prefix) { + std::shared_ptr<Int64ArrayMergeOperator> merge_op( + new Int64ArrayMergeOperator); + db->set_merge_operator(prefix, merge_op); +} + +ZonedFreelistManager::ZonedFreelistManager( + CephContext* cct, + string meta_prefix, + string info_prefix) + : FreelistManager(cct), + meta_prefix(meta_prefix), + info_prefix(info_prefix), + enumerate_zone_num(~0UL) {} + +int ZonedFreelistManager::create( + uint64_t new_size, + uint64_t granularity, + KeyValueDB::Transaction txn) { + // To avoid interface changes, we piggyback zone size and the first sequential + // zone number onto the first 32 bits of 64-bit |granularity|. The last 32 + // bits of |granularity| is holding the actual allocation granularity, which + // is bytes_per_block. + size = new_size; + bytes_per_block = granularity & 0x00000000ffffffff; + zone_size = ((granularity & 0x0000ffff00000000) >> 32) * 1024 * 1024; + num_zones = size / zone_size; + starting_zone_num = (granularity & 0xffff000000000000) >> 48; + enumerate_zone_num = ~0UL; + + ceph_assert(size % zone_size == 0); + + dout(1) << __func__ << std::hex + << " size 0x" << size + << " bytes_per_block 0x" << bytes_per_block + << " zone size 0x " << zone_size + << " num_zones 0x" << num_zones + << " starting_zone 0x" << starting_zone_num << dendl; + { + bufferlist bl; + encode(size, bl); + txn->set(meta_prefix, "size", bl); + } + { + bufferlist bl; + encode(bytes_per_block, bl); + txn->set(meta_prefix, "bytes_per_block", bl); + } + { + bufferlist bl; + encode(zone_size, bl); + txn->set(meta_prefix, "zone_size", bl); + } + { + bufferlist bl; + encode(num_zones, bl); + txn->set(meta_prefix, "num_zones", bl); + } + { + bufferlist bl; + encode(starting_zone_num, bl); + txn->set(meta_prefix, "starting_zone_num", bl); + } + + init_zone_states(txn); + + return 0; +} + +int ZonedFreelistManager::init( + KeyValueDB *kvdb, + bool db_in_read_only, + cfg_reader_t cfg_reader) { + dout(1) << __func__ << dendl; + int r = _read_cfg(cfg_reader); + if (r != 0) { + return r; + } + + ceph_assert(num_zones == size / zone_size); + + dout(10) << __func__ << std::hex + << " size 0x" << size + << " bytes_per_block 0x" << bytes_per_block + << " zone size 0x" << zone_size + << " num_zones 0x" << num_zones + << " starting_zone 0x" << starting_zone_num + << std::dec << dendl; + return 0; +} + +void ZonedFreelistManager::sync(KeyValueDB* kvdb) {} + +void ZonedFreelistManager::shutdown() { + dout(1) << __func__ << dendl; +} + +void ZonedFreelistManager::enumerate_reset() { + std::lock_guard l(lock); + + dout(1) << __func__ << dendl; + + enumerate_p.reset(); + enumerate_zone_num = ~0UL; +} + +// Currently, this just iterates over the list of zones and sets |offset| and +// |length| to the write pointer and the number of remaining free bytes in a +// given zone. Hence, it can set |length| to 0 if a zone is full, and it can +// also return two contiguous empty zones in two calls. This does not violate +// current semantics of the call and appears to work fine with the clients of +// this call. +bool ZonedFreelistManager::enumerate_next( + KeyValueDB *kvdb, + uint64_t *offset, + uint64_t *length) { + std::lock_guard l(lock); + + // starting case + if (enumerate_zone_num == ~0UL) { + dout(30) << __func__ << " start" << dendl; + enumerate_p = kvdb->get_iterator(info_prefix); + enumerate_p->lower_bound(string()); + ceph_assert(enumerate_p->valid()); + enumerate_zone_num = 0; + } else { + enumerate_p->next(); + if (!enumerate_p->valid()) { + dout(30) << __func__ << " end" << dendl; + return false; + } + ++enumerate_zone_num; + } + + zone_state_t zone_state; + load_zone_state_from_db(enumerate_zone_num, zone_state, enumerate_p); + + *offset = enumerate_zone_num * zone_size + zone_state.get_write_pointer(); + *length = zone_size - zone_state.get_write_pointer(); + + dout(30) << __func__ << std::hex << " 0x" << *offset << "~" << *length + << std::dec << dendl; + + return true; +} + +void ZonedFreelistManager::dump(KeyValueDB *kvdb) { + enumerate_reset(); + uint64_t offset, length; + while (enumerate_next(kvdb, &offset, &length)) { + dout(20) << __func__ << " 0x" << std::hex << offset << "~" << length + << std::dec << dendl; + } +} + +// Advances the write pointer and writes the updated write pointer to database. +void ZonedFreelistManager::allocate( + uint64_t offset, + uint64_t length, + KeyValueDB::Transaction txn) { + dout(10) << __func__ << " 0x" << std::hex << offset << "~" << length << dendl; + uint64_t zone_num = offset / zone_size; + zone_state_t zone_state; + zone_state.increment_write_pointer(length); + write_zone_state_to_db(zone_num, zone_state, txn); +} + +// Increments the number of dead bytes in a zone and writes the updated value to +// database. The dead bytes in the zone are not usable. The cleaner will later +// copy live objects from the zone to another zone an make the zone writable +// again. The number of dead bytes in a zone is used by the cleaner to select +// which zones to clean -- the ones with most dead bytes are good candidates +// since they require less I/O. +void ZonedFreelistManager::release( + uint64_t offset, + uint64_t length, + KeyValueDB::Transaction txn) { + dout(10) << __func__ << " 0x" << std::hex << offset << "~" << length << dendl; + uint64_t zone_num = offset / zone_size; + zone_state_t zone_state; + zone_state.increment_num_dead_bytes(length); + write_zone_state_to_db(zone_num, zone_state, txn); +} + +void ZonedFreelistManager::get_meta( + uint64_t target_size, + std::vector<std::pair<string, string>>* res) const { + // We do not support expanding devices for now. + ceph_assert(target_size == 0); + res->emplace_back("zfm_size", stringify(size)); + res->emplace_back("zfm_bytes_per_block", stringify(bytes_per_block)); + res->emplace_back("zfm_zone_size", stringify(zone_size)); + res->emplace_back("zfm_num_zones", stringify(num_zones)); + res->emplace_back("zfm_starting_zone_num", stringify(starting_zone_num)); +} + +std::vector<zone_state_t> ZonedFreelistManager::get_zone_states( + KeyValueDB *kvdb) const { + std::vector<zone_state_t> zone_states; + auto p = kvdb->get_iterator(info_prefix); + uint64_t zone_num = 0; + for (p->lower_bound(string()); p->valid(); p->next(), ++zone_num) { + zone_state_t zone_state; + load_zone_state_from_db(zone_num, zone_state, p); + zone_states.emplace_back(zone_state); + } + return zone_states; +} + +// TODO: The following function is copied almost verbatim from +// BitmapFreelistManager. Eliminate duplication. +int ZonedFreelistManager::_read_cfg(cfg_reader_t cfg_reader) { + dout(1) << __func__ << dendl; + + string err; + + const size_t key_count = 5; + string keys[key_count] = { + "zfm_size", + "zfm_bytes_per_block", + "zfm_zone_size", + "zfm_num_zones", + "zfm_starting_zone_num" + }; + uint64_t* vals[key_count] = { + &size, + &bytes_per_block, + &zone_size, + &num_zones, + &starting_zone_num}; + + for (size_t i = 0; i < key_count; i++) { + string val; + int r = cfg_reader(keys[i], &val); + if (r == 0) { + *(vals[i]) = strict_iecstrtoll(val.c_str(), &err); + if (!err.empty()) { + derr << __func__ << " Failed to parse - " + << keys[i] << ":" << val + << ", error: " << err << dendl; + return -EINVAL; + } + } else { + // this is expected for legacy deployed OSDs + dout(0) << __func__ << " " << keys[i] << " not found in bdev meta" << dendl; + return r; + } + } + return 0; +} diff --git a/src/os/bluestore/ZonedFreelistManager.h b/src/os/bluestore/ZonedFreelistManager.h new file mode 100644 index 000000000..ec08f3113 --- /dev/null +++ b/src/os/bluestore/ZonedFreelistManager.h @@ -0,0 +1,106 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +// +// A freelist manager for zoned devices. This iteration just keeps the write +// pointer per zone. Following iterations will add enough information to enable +// cleaning of zones. +// +// Copyright (C) 2020 Abutalib Aghayev +// + +#ifndef CEPH_OS_BLUESTORE_ZONEDFREELISTMANAGER_H +#define CEPH_OS_BLUESTORE_ZONEDFREELISTMANAGER_H + +#include "FreelistManager.h" + +#include <string> +#include <mutex> + +#include "common/ceph_mutex.h" +#include "include/buffer.h" +#include "kv/KeyValueDB.h" + +using cfg_reader_t = std::function<int(const std::string&, std::string*)>; + +class ZonedFreelistManager : public FreelistManager { + std::string meta_prefix; ///< device size, zone size, etc. + std::string info_prefix; ///< per zone write pointer, dead bytes + mutable ceph::mutex lock = ceph::make_mutex("ZonedFreelistManager::lock"); + + uint64_t size; ///< size of sequential region (bytes) + uint64_t bytes_per_block; ///< bytes per allocation unit (bytes) + uint64_t zone_size; ///< size of a single zone (bytes) + uint64_t num_zones; ///< number of sequential zones + uint64_t starting_zone_num; ///< the first sequential zone number + + KeyValueDB::Iterator enumerate_p; + uint64_t enumerate_zone_num; + + void write_zone_state_to_db(uint64_t zone_num, + const zone_state_t &zone_state, + KeyValueDB::Transaction txn); + void load_zone_state_from_db(uint64_t zone_num, + zone_state_t &zone_state, + KeyValueDB::Iterator &it) const; + + void init_zone_states(KeyValueDB::Transaction txn); + + void increment_write_pointer( + uint64_t zone, uint64_t length, KeyValueDB::Transaction txn); + void increment_num_dead_bytes( + uint64_t zone, uint64_t num_bytes, KeyValueDB::Transaction txn); + + int _read_cfg(cfg_reader_t cfg_reader); + +public: + ZonedFreelistManager(CephContext* cct, + std::string meta_prefix, + std::string info_prefix); + + static void setup_merge_operator(KeyValueDB *db, std::string prefix); + + int create(uint64_t size, + uint64_t granularity, + KeyValueDB::Transaction txn) override; + + int init(KeyValueDB *kvdb, + bool db_in_read_only, + cfg_reader_t cfg_reader) override; + + void shutdown() override; + void sync(KeyValueDB* kvdb) override; + void dump(KeyValueDB *kvdb) override; + + void enumerate_reset() override; + bool enumerate_next(KeyValueDB *kvdb, + uint64_t *offset, + uint64_t *length) override; + + void allocate(uint64_t offset, + uint64_t length, + KeyValueDB::Transaction txn) override; + + void release(uint64_t offset, + uint64_t length, + KeyValueDB::Transaction txn) override; + + inline uint64_t get_size() const override { + return size; + } + + inline uint64_t get_alloc_units() const override { + return size / bytes_per_block; + } + + inline uint64_t get_alloc_size() const override { + return bytes_per_block; + } + + void get_meta(uint64_t target_size, + std::vector<std::pair<string, string>>*) const override; + + std::vector<zone_state_t> get_zone_states(KeyValueDB *kvdb) const override; +}; + +#endif diff --git a/src/os/bluestore/bluefs_types.cc b/src/os/bluestore/bluefs_types.cc new file mode 100644 index 000000000..3a812cf5f --- /dev/null +++ b/src/os/bluestore/bluefs_types.cc @@ -0,0 +1,285 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#include <algorithm> +#include "bluefs_types.h" +#include "common/Formatter.h" +#include "include/uuid.h" +#include "include/stringify.h" + +using std::list; +using std::ostream; + +using ceph::bufferlist; +using ceph::Formatter; + +// bluefs_extent_t +void bluefs_extent_t::dump(Formatter *f) const +{ + f->dump_unsigned("offset", offset); + f->dump_unsigned("length", length); + f->dump_unsigned("bdev", bdev); +} + +void bluefs_extent_t::generate_test_instances(list<bluefs_extent_t*>& ls) +{ + ls.push_back(new bluefs_extent_t); + ls.push_back(new bluefs_extent_t); + ls.back()->offset = 1; + ls.back()->length = 2; + ls.back()->bdev = 1; +} + +ostream& operator<<(ostream& out, const bluefs_extent_t& e) +{ + return out << (int)e.bdev << ":0x" << std::hex << e.offset << "~" << e.length + << std::dec; +} + +// bluefs_layout_t + +void bluefs_layout_t::encode(bufferlist& bl) const +{ + ENCODE_START(1, 1, bl); + encode(shared_bdev, bl); + encode(dedicated_db, bl); + encode(dedicated_wal, bl); + ENCODE_FINISH(bl); +} + +void bluefs_layout_t::decode(bufferlist::const_iterator& p) +{ + DECODE_START(1, p); + decode(shared_bdev, p); + decode(dedicated_db, p); + decode(dedicated_wal, p); + DECODE_FINISH(p); +} + +void bluefs_layout_t::dump(Formatter *f) const +{ + f->dump_stream("shared_bdev") << shared_bdev; + f->dump_stream("dedicated_db") << dedicated_db; + f->dump_stream("dedicated_wal") << dedicated_wal; +} + +// bluefs_super_t + +void bluefs_super_t::encode(bufferlist& bl) const +{ + ENCODE_START(2, 1, bl); + encode(uuid, bl); + encode(osd_uuid, bl); + encode(version, bl); + encode(block_size, bl); + encode(log_fnode, bl); + encode(memorized_layout, bl); + ENCODE_FINISH(bl); +} + +void bluefs_super_t::decode(bufferlist::const_iterator& p) +{ + DECODE_START(2, p); + decode(uuid, p); + decode(osd_uuid, p); + decode(version, p); + decode(block_size, p); + decode(log_fnode, p); + if (struct_v >= 2) { + decode(memorized_layout, p); + } + DECODE_FINISH(p); +} + +void bluefs_super_t::dump(Formatter *f) const +{ + f->dump_stream("uuid") << uuid; + f->dump_stream("osd_uuid") << osd_uuid; + f->dump_unsigned("version", version); + f->dump_unsigned("block_size", block_size); + f->dump_object("log_fnode", log_fnode); +} + +void bluefs_super_t::generate_test_instances(list<bluefs_super_t*>& ls) +{ + ls.push_back(new bluefs_super_t); + ls.push_back(new bluefs_super_t); + ls.back()->version = 1; + ls.back()->block_size = 4096; +} + +ostream& operator<<(ostream& out, const bluefs_super_t& s) +{ + return out << "super(uuid " << s.uuid + << " osd " << s.osd_uuid + << " v " << s.version + << " block_size 0x" << std::hex << s.block_size + << " log_fnode 0x" << s.log_fnode + << std::dec << ")"; +} + +// bluefs_fnode_t + +mempool::bluefs::vector<bluefs_extent_t>::iterator bluefs_fnode_t::seek( + uint64_t offset, uint64_t *x_off) +{ + auto p = extents.begin(); + + if (extents_index.size() > 4) { + auto it = std::upper_bound(extents_index.begin(), extents_index.end(), + offset); + assert(it != extents_index.begin()); + --it; + assert(offset >= *it); + p += it - extents_index.begin(); + offset -= *it; + } + + while (p != extents.end()) { + if ((int64_t) offset >= p->length) { + offset -= p->length; + ++p; + } else { + break; + } + } + *x_off = offset; + return p; +} + +bluefs_fnode_delta_t* bluefs_fnode_t::make_delta(bluefs_fnode_delta_t* delta) { + ceph_assert(delta); + delta->ino = ino; + delta->size = size; + delta->mtime = mtime; + delta->offset = allocated_commited; + delta->extents.clear(); + if (allocated_commited < allocated) { + uint64_t x_off = 0; + auto p = seek(allocated_commited, &x_off); + ceph_assert(p != extents.end()); + if (x_off > 0) { + ceph_assert(x_off < p->length); + delta->extents.emplace_back(p->bdev, p->offset + x_off, p->length - x_off); + ++p; + } + while (p != extents.end()) { + delta->extents.push_back(*p); + ++p; + } + reset_delta(); + } + return delta; +} + +void bluefs_fnode_t::dump(Formatter *f) const +{ + f->dump_unsigned("ino", ino); + f->dump_unsigned("size", size); + f->dump_stream("mtime") << mtime; + f->open_array_section("extents"); + for (auto& p : extents) + f->dump_object("extent", p); + f->close_section(); +} + +void bluefs_fnode_t::generate_test_instances(list<bluefs_fnode_t*>& ls) +{ + ls.push_back(new bluefs_fnode_t); + ls.push_back(new bluefs_fnode_t); + ls.back()->ino = 123; + ls.back()->size = 1048576; + ls.back()->mtime = utime_t(123,45); + ls.back()->extents.push_back(bluefs_extent_t(0, 1048576, 4096)); + ls.back()->__unused__ = 1; +} + +ostream& operator<<(ostream& out, const bluefs_fnode_t& file) +{ + return out << "file(ino " << file.ino + << " size 0x" << std::hex << file.size << std::dec + << " mtime " << file.mtime + << " allocated " << std::hex << file.allocated << std::dec + << " alloc_commit " << std::hex << file.allocated_commited << std::dec + << " extents " << file.extents + << ")"; +} + +// bluefs_fnode_delta_t + +std::ostream& operator<<(std::ostream& out, const bluefs_fnode_delta_t& delta) +{ + return out << "delta(ino " << delta.ino + << " size 0x" << std::hex << delta.size << std::dec + << " mtime " << delta.mtime + << " offset " << std::hex << delta.offset << std::dec + << " extents " << delta.extents + << ")"; +} + +// bluefs_transaction_t + +void bluefs_transaction_t::encode(bufferlist& bl) const +{ + uint32_t crc = op_bl.crc32c(-1); + ENCODE_START(1, 1, bl); + encode(uuid, bl); + encode(seq, bl); + // not using bufferlist encode method, as it merely copies the bufferptr and not + // contents, meaning we're left with fragmented target bl + __u32 len = op_bl.length(); + encode(len, bl); + for (auto& it : op_bl.buffers()) { + bl.append(it.c_str(), it.length()); + } + encode(crc, bl); + ENCODE_FINISH(bl); +} + +void bluefs_transaction_t::decode(bufferlist::const_iterator& p) +{ + uint32_t crc; + DECODE_START(1, p); + decode(uuid, p); + decode(seq, p); + decode(op_bl, p); + decode(crc, p); + DECODE_FINISH(p); + uint32_t actual = op_bl.crc32c(-1); + if (actual != crc) + throw ceph::buffer::malformed_input("bad crc " + stringify(actual) + + " expected " + stringify(crc)); +} + +void bluefs_transaction_t::dump(Formatter *f) const +{ + f->dump_stream("uuid") << uuid; + f->dump_unsigned("seq", seq); + f->dump_unsigned("op_bl_length", op_bl.length()); + f->dump_unsigned("crc", op_bl.crc32c(-1)); +} + +void bluefs_transaction_t::generate_test_instances( + list<bluefs_transaction_t*>& ls) +{ + ls.push_back(new bluefs_transaction_t); + ls.push_back(new bluefs_transaction_t); + ls.back()->op_init(); + ls.back()->op_dir_create("dir"); + ls.back()->op_dir_create("dir2"); + bluefs_fnode_t fnode; + fnode.ino = 2; + ls.back()->op_file_update(fnode); + ls.back()->op_dir_link("dir", "file1", 2); + ls.back()->op_dir_unlink("dir", "file1"); + ls.back()->op_file_remove(2); + ls.back()->op_dir_remove("dir2"); +} + +ostream& operator<<(ostream& out, const bluefs_transaction_t& t) +{ + return out << "txn(seq " << t.seq + << " len 0x" << std::hex << t.op_bl.length() + << " crc 0x" << t.op_bl.crc32c(-1) + << std::dec << ")"; +} diff --git a/src/os/bluestore/bluefs_types.h b/src/os/bluestore/bluefs_types.h new file mode 100644 index 000000000..b53000188 --- /dev/null +++ b/src/os/bluestore/bluefs_types.h @@ -0,0 +1,320 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab +#ifndef CEPH_OS_BLUESTORE_BLUEFS_TYPES_H +#define CEPH_OS_BLUESTORE_BLUEFS_TYPES_H + +#include <optional> + +#include "bluestore_types.h" +#include "include/utime.h" +#include "include/encoding.h" +#include "include/denc.h" + +class bluefs_extent_t { +public: + uint64_t offset = 0; + uint32_t length = 0; + uint8_t bdev; + + bluefs_extent_t(uint8_t b = 0, uint64_t o = 0, uint32_t l = 0) + : offset(o), length(l), bdev(b) {} + + uint64_t end() const { return offset + length; } + DENC(bluefs_extent_t, v, p) { + DENC_START(1, 1, p); + denc_lba(v.offset, p); + denc_varint_lowz(v.length, p); + denc(v.bdev, p); + DENC_FINISH(p); + } + + void dump(ceph::Formatter *f) const; + static void generate_test_instances(std::list<bluefs_extent_t*>&); +}; +WRITE_CLASS_DENC(bluefs_extent_t) + +std::ostream& operator<<(std::ostream& out, const bluefs_extent_t& e); + +struct bluefs_fnode_delta_t { + uint64_t ino; + uint64_t size; + utime_t mtime; + uint64_t offset; // Contains offset in file of extents. + // Equal to 'allocated' when created. + // Used for consistency checking. + mempool::bluefs::vector<bluefs_extent_t> extents; + + DENC(bluefs_fnode_delta_t, v, p) { + DENC_START(1, 1, p); + denc_varint(v.ino, p); + denc_varint(v.size, p); + denc(v.mtime, p); + denc(v.offset, p); + denc(v.extents, p); + DENC_FINISH(p); + } +}; +WRITE_CLASS_DENC(bluefs_fnode_delta_t) + +std::ostream& operator<<(std::ostream& out, const bluefs_fnode_delta_t& delta); + +struct bluefs_fnode_t { + uint64_t ino; + uint64_t size; + utime_t mtime; + uint8_t __unused__; // was prefer_bdev + mempool::bluefs::vector<bluefs_extent_t> extents; + + // precalculated logical offsets for extents vector entries + // allows fast lookup for extent index by the offset value via upper_bound() + mempool::bluefs::vector<uint64_t> extents_index; + + uint64_t allocated; + uint64_t allocated_commited; + + bluefs_fnode_t() : ino(0), size(0), __unused__(0), allocated(0), allocated_commited(0) {} + + uint64_t get_allocated() const { + return allocated; + } + + void recalc_allocated() { + allocated = 0; + extents_index.reserve(extents.size()); + for (auto& p : extents) { + extents_index.emplace_back(allocated); + allocated += p.length; + } + allocated_commited = allocated; + } + + DENC_HELPERS + void bound_encode(size_t& p) const { + _denc_friend(*this, p); + } + void encode(ceph::buffer::list::contiguous_appender& p) const { + DENC_DUMP_PRE(bluefs_fnode_t); + _denc_friend(*this, p); + } + void decode(ceph::buffer::ptr::const_iterator& p) { + _denc_friend(*this, p); + recalc_allocated(); + } + template<typename T, typename P> + friend std::enable_if_t<std::is_same_v<bluefs_fnode_t, std::remove_const_t<T>>> + _denc_friend(T& v, P& p) { + DENC_START(1, 1, p); + denc_varint(v.ino, p); + denc_varint(v.size, p); + denc(v.mtime, p); + denc(v.__unused__, p); + denc(v.extents, p); + DENC_FINISH(p); + } + + void reset_delta() { + allocated_commited = allocated; + } + void claim_extents(mempool::bluefs::vector<bluefs_extent_t>& extents) { + for (const auto& p : extents) { + append_extent(p); + } + extents.clear(); + } + void append_extent(const bluefs_extent_t& ext) { + if (!extents.empty() && + extents.back().end() == ext.offset && + extents.back().bdev == ext.bdev && + (uint64_t)extents.back().length + (uint64_t)ext.length < 0xffffffff) { + extents.back().length += ext.length; + } else { + extents_index.emplace_back(allocated); + extents.push_back(ext); + } + allocated += ext.length; + } + + void pop_front_extent() { + auto it = extents.begin(); + allocated -= it->length; + extents_index.erase(extents_index.begin()); + for (auto& i: extents_index) { + i -= it->length; + } + extents.erase(it); + } + + void swap_extents(bluefs_fnode_t& other) { + other.extents.swap(extents); + other.extents_index.swap(extents_index); + std::swap(allocated, other.allocated); + std::swap(allocated_commited, other.allocated_commited); + } + void clear_extents() { + extents_index.clear(); + extents.clear(); + allocated = 0; + allocated_commited = 0; + } + + mempool::bluefs::vector<bluefs_extent_t>::iterator seek( + uint64_t off, uint64_t *x_off); + bluefs_fnode_delta_t* make_delta(bluefs_fnode_delta_t* delta); + + void dump(ceph::Formatter *f) const; + static void generate_test_instances(std::list<bluefs_fnode_t*>& ls); + +}; +WRITE_CLASS_DENC(bluefs_fnode_t) + +std::ostream& operator<<(std::ostream& out, const bluefs_fnode_t& file); + +struct bluefs_layout_t { + unsigned shared_bdev = 0; ///< which bluefs bdev we are sharing + bool dedicated_db = false; ///< whether block.db is present + bool dedicated_wal = false; ///< whether block.wal is present + + bool single_shared_device() const { + return !dedicated_db && !dedicated_wal; + } + + bool operator==(const bluefs_layout_t& other) const { + return shared_bdev == other.shared_bdev && + dedicated_db == other.dedicated_db && + dedicated_wal == other.dedicated_wal; + } + + void encode(ceph::buffer::list& bl) const; + void decode(ceph::buffer::list::const_iterator& p); + void dump(ceph::Formatter *f) const; +}; +WRITE_CLASS_ENCODER(bluefs_layout_t) + +struct bluefs_super_t { + uuid_d uuid; ///< unique to this bluefs instance + uuid_d osd_uuid; ///< matches the osd that owns us + uint64_t version; + uint32_t block_size; + + bluefs_fnode_t log_fnode; + + std::optional<bluefs_layout_t> memorized_layout; + + bluefs_super_t() + : version(0), + block_size(4096) { } + + uint64_t block_mask() const { + return ~((uint64_t)block_size - 1); + } + + void encode(ceph::buffer::list& bl) const; + void decode(ceph::buffer::list::const_iterator& p); + void dump(ceph::Formatter *f) const; + static void generate_test_instances(std::list<bluefs_super_t*>& ls); +}; +WRITE_CLASS_ENCODER(bluefs_super_t) + +std::ostream& operator<<(std::ostream&, const bluefs_super_t& s); + + +struct bluefs_transaction_t { + typedef enum { + OP_NONE = 0, + OP_INIT, ///< initial (empty) file system marker + OP_ALLOC_ADD, ///< OBSOLETE: add extent to available block storage (extent) + OP_ALLOC_RM, ///< OBSOLETE: remove extent from available block storage (extent) + OP_DIR_LINK, ///< (re)set a dir entry (dirname, filename, ino) + OP_DIR_UNLINK, ///< remove a dir entry (dirname, filename) + OP_DIR_CREATE, ///< create a dir (dirname) + OP_DIR_REMOVE, ///< remove a dir (dirname) + OP_FILE_UPDATE, ///< set/update file metadata (file) + OP_FILE_REMOVE, ///< remove file (ino) + OP_JUMP, ///< jump the seq # and offset + OP_JUMP_SEQ, ///< jump the seq # + OP_FILE_UPDATE_INC, ///< incremental update file metadata (file) + } op_t; + + uuid_d uuid; ///< fs uuid + uint64_t seq; ///< sequence number + ceph::buffer::list op_bl; ///< encoded transaction ops + + bluefs_transaction_t() : seq(0) {} + + void clear() { + *this = bluefs_transaction_t(); + } + bool empty() const { + return op_bl.length() == 0; + } + + void op_init() { + using ceph::encode; + encode((__u8)OP_INIT, op_bl); + } + void op_dir_create(std::string_view dir) { + using ceph::encode; + encode((__u8)OP_DIR_CREATE, op_bl); + encode(dir, op_bl); + } + void op_dir_remove(std::string_view dir) { + using ceph::encode; + encode((__u8)OP_DIR_REMOVE, op_bl); + encode(dir, op_bl); + } + void op_dir_link(std::string_view dir, std::string_view file, uint64_t ino) { + using ceph::encode; + encode((__u8)OP_DIR_LINK, op_bl); + encode(dir, op_bl); + encode(file, op_bl); + encode(ino, op_bl); + } + void op_dir_unlink(std::string_view dir, std::string_view file) { + using ceph::encode; + encode((__u8)OP_DIR_UNLINK, op_bl); + encode(dir, op_bl); + encode(file, op_bl); + } + void op_file_update(bluefs_fnode_t& file) { + using ceph::encode; + encode((__u8)OP_FILE_UPDATE, op_bl); + encode(file, op_bl); + file.reset_delta(); + } + /* streams update to bufferlist and clears update state */ + void op_file_update_inc(bluefs_fnode_t& file) { + using ceph::encode; + bluefs_fnode_delta_t delta; + file.make_delta(&delta); //also resets delta to zero + encode((__u8)OP_FILE_UPDATE_INC, op_bl); + encode(delta, op_bl); + } + void op_file_remove(uint64_t ino) { + using ceph::encode; + encode((__u8)OP_FILE_REMOVE, op_bl); + encode(ino, op_bl); + } + void op_jump(uint64_t next_seq, uint64_t offset) { + using ceph::encode; + encode((__u8)OP_JUMP, op_bl); + encode(next_seq, op_bl); + encode(offset, op_bl); + } + void op_jump_seq(uint64_t next_seq) { + using ceph::encode; + encode((__u8)OP_JUMP_SEQ, op_bl); + encode(next_seq, op_bl); + } + void claim_ops(bluefs_transaction_t& from) { + op_bl.claim_append(from.op_bl); + } + + void encode(ceph::buffer::list& bl) const; + void decode(ceph::buffer::list::const_iterator& p); + void dump(ceph::Formatter *f) const; + static void generate_test_instances(std::list<bluefs_transaction_t*>& ls); +}; +WRITE_CLASS_ENCODER(bluefs_transaction_t) + +std::ostream& operator<<(std::ostream& out, const bluefs_transaction_t& t); +#endif diff --git a/src/os/bluestore/bluestore_common.h b/src/os/bluestore/bluestore_common.h new file mode 100755 index 000000000..f61a5dcfd --- /dev/null +++ b/src/os/bluestore/bluestore_common.h @@ -0,0 +1,65 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab +/* + * Ceph - scalable distributed file system + * + * Copyright (C) 2014 Red Hat + * + * This is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License version 2.1, as published by the Free Software + * Foundation. See file COPYING. + * + */ + +#ifndef CEPH_OSD_BLUESTORE_COMMON_H +#define CEPH_OSD_BLUESTORE_COMMON_H + +#include "include/intarith.h" +#include "include/ceph_assert.h" +#include "kv/KeyValueDB.h" + +template <class Bitset, class Func> +void apply_for_bitset_range(uint64_t off, + uint64_t len, + uint64_t granularity, + Bitset &bitset, + Func f) { + auto end = round_up_to(off + len, granularity) / granularity; + ceph_assert(end <= bitset.size()); + uint64_t pos = off / granularity; + while (pos < end) { + f(pos, bitset); + pos++; + } +} + +// merge operators + +struct Int64ArrayMergeOperator : public KeyValueDB::MergeOperator { + void merge_nonexistent( + const char *rdata, size_t rlen, std::string *new_value) override { + *new_value = std::string(rdata, rlen); + } + void merge( + const char *ldata, size_t llen, + const char *rdata, size_t rlen, + std::string *new_value) override { + ceph_assert(llen == rlen); + ceph_assert((rlen % 8) == 0); + new_value->resize(rlen); + const ceph_le64* lv = (const ceph_le64*)ldata; + const ceph_le64* rv = (const ceph_le64*)rdata; + ceph_le64* nv = &(ceph_le64&)new_value->at(0); + for (size_t i = 0; i < rlen >> 3; ++i) { + nv[i] = lv[i] + rv[i]; + } + } + // We use each operator name and each prefix to construct the + // overall RocksDB operator name for consistency check at open time. + const char *name() const override { + return "int64_array"; + } +}; + +#endif diff --git a/src/os/bluestore/bluestore_tool.cc b/src/os/bluestore/bluestore_tool.cc new file mode 100644 index 000000000..1d0bdb391 --- /dev/null +++ b/src/os/bluestore/bluestore_tool.cc @@ -0,0 +1,1064 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#include <boost/program_options/variables_map.hpp> +#include <boost/program_options/parsers.hpp> + +#include <stdio.h> +#include <string.h> +#if __has_include(<filesystem>) +#include <filesystem> +namespace fs = std::filesystem; +#elif __has_include(<experimental/filesystem>) +#include <experimental/filesystem> +namespace fs = std::experimental::filesystem; +#endif +#include <iostream> +#include <fstream> +#include <time.h> +#include <fcntl.h> +#include <unistd.h> +#include "global/global_init.h" +#include "common/ceph_argparse.h" +#include "include/stringify.h" +#include "common/errno.h" +#include "common/safe_io.h" + +#include "os/bluestore/BlueFS.h" +#include "os/bluestore/BlueStore.h" +#include "common/admin_socket.h" +#include "kv/RocksDBStore.h" + +namespace po = boost::program_options; + +void usage(po::options_description &desc) +{ + cout << desc << std::endl; +} + +void validate_path(CephContext *cct, const string& path, bool bluefs) +{ + BlueStore bluestore(cct, path); + string type; + int r = bluestore.read_meta("type", &type); + if (r < 0) { + cerr << "failed to load os-type: " << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + if (type != "bluestore") { + cerr << "expected bluestore, but type is " << type << std::endl; + exit(EXIT_FAILURE); + } + if (!bluefs) { + return; + } + + string kv_backend; + r = bluestore.read_meta("kv_backend", &kv_backend); + if (r < 0) { + cerr << "failed to load kv_backend: " << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + if (kv_backend != "rocksdb") { + cerr << "expect kv_backend to be rocksdb, but is " << kv_backend + << std::endl; + exit(EXIT_FAILURE); + } + string bluefs_enabled; + r = bluestore.read_meta("bluefs", &bluefs_enabled); + if (r < 0) { + cerr << "failed to load do_bluefs: " << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + if (bluefs_enabled != "1") { + cerr << "bluefs not enabled for rocksdb" << std::endl; + exit(EXIT_FAILURE); + } +} + +const char* find_device_path( + int id, + CephContext *cct, + const vector<string>& devs) +{ + for (auto& i : devs) { + bluestore_bdev_label_t label; + int r = BlueStore::_read_bdev_label(cct, i, &label); + if (r < 0) { + cerr << "unable to read label for " << i << ": " + << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + if ((id == BlueFS::BDEV_SLOW && label.description == "main") || + (id == BlueFS::BDEV_DB && label.description == "bluefs db") || + (id == BlueFS::BDEV_WAL && label.description == "bluefs wal")) { + return i.c_str(); + } + } + return nullptr; +} + +void parse_devices( + CephContext *cct, + const vector<string>& devs, + map<string, int>* got, + bool* has_db, + bool* has_wal) +{ + string main; + bool was_db = false; + if (has_wal) { + *has_wal = false; + } + if (has_db) { + *has_db = false; + } + for (auto& d : devs) { + bluestore_bdev_label_t label; + int r = BlueStore::_read_bdev_label(cct, d, &label); + if (r < 0) { + cerr << "unable to read label for " << d << ": " + << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + int id = -1; + if (label.description == "main") + main = d; + else if (label.description == "bluefs db") { + id = BlueFS::BDEV_DB; + was_db = true; + if (has_db) { + *has_db = true; + } + } + else if (label.description == "bluefs wal") { + id = BlueFS::BDEV_WAL; + if (has_wal) { + *has_wal = true; + } + } + if (id >= 0) { + got->emplace(d, id); + } + } + if (main.length()) { + int id = was_db ? BlueFS::BDEV_SLOW : BlueFS::BDEV_DB; + got->emplace(main, id); + } +} + +void add_devices( + BlueFS *fs, + CephContext *cct, + const vector<string>& devs) +{ + map<string, int> got; + parse_devices(cct, devs, &got, nullptr, nullptr); + for(auto e : got) { + char target_path[PATH_MAX] = ""; + if(!e.first.empty()) { + if (realpath(e.first.c_str(), target_path) == nullptr) { + cerr << "failed to retrieve absolute path for " << e.first + << ": " << cpp_strerror(errno) + << std::endl; + } + } + + cout << " slot " << e.second << " " << e.first; + if (target_path[0]) { + cout << " -> " << target_path; + } + cout << std::endl; + + // We provide no shared allocator which prevents bluefs to operate in R/W mode. + // Read-only mode isn't strictly enforced though + int r = fs->add_block_device(e.second, e.first, false, 0); // 'reserved' is fake + if (r < 0) { + cerr << "unable to open " << e.first << ": " << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + } +} + +BlueFS *open_bluefs_readonly( + CephContext *cct, + const string& path, + const vector<string>& devs) +{ + validate_path(cct, path, true); + BlueFS *fs = new BlueFS(cct); + + add_devices(fs, cct, devs); + + int r = fs->mount(); + if (r < 0) { + cerr << "unable to mount bluefs: " << cpp_strerror(r) + << std::endl; + exit(EXIT_FAILURE); + } + return fs; +} + +void log_dump( + CephContext *cct, + const string& path, + const vector<string>& devs) +{ + validate_path(cct, path, true); + BlueFS *fs = new BlueFS(cct); + + add_devices(fs, cct, devs); + int r = fs->log_dump(); + if (r < 0) { + cerr << "log_dump failed" << ": " + << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + + delete fs; +} + +void inferring_bluefs_devices(vector<string>& devs, std::string& path) +{ + cout << "inferring bluefs devices from bluestore path" << std::endl; + for (auto fn : {"block", "block.wal", "block.db"}) { + string p = path + "/" + fn; + struct stat st; + if (::stat(p.c_str(), &st) == 0) { + devs.push_back(p); + } + } +} + +static void bluefs_import( + const string& input_file, + const string& dest_file, + CephContext *cct, + const string& path, + const vector<string>& devs) +{ + int r; + std::ifstream f(input_file.c_str(), std::ifstream::binary); + if (!f) { + r = -errno; + cerr << "open " << input_file.c_str() << " failed: " << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + BlueStore bluestore(cct, path); + KeyValueDB *db_ptr; + r = bluestore.open_db_environment(&db_ptr, false); + if (r < 0) { + cerr << "error preparing db environment: " << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + BlueFS* bs = bluestore.get_bluefs(); + + BlueFS::FileWriter *h; + fs::path file_path(dest_file); + const string dir = file_path.parent_path(); + const string file_name = file_path.filename(); + bs->open_for_write(dir, file_name, &h, false); + uint64_t max_block = 4096; + char buf[max_block]; + uint64_t left = fs::file_size(input_file.c_str()); + uint64_t size = 0; + while (left) { + size = std::min(max_block, left); + f.read(buf, size); + h->append(buf, size); + left -= size; + } + f.close(); + bs->fsync(h); + bs->close_writer(h); + bluestore.close_db_environment(); + return; +} + +int main(int argc, char **argv) +{ + string out_dir; + vector<string> devs; + vector<string> devs_source; + string dev_target; + string path; + string action; + string log_file; + string input_file; + string dest_file; + string key, value; + vector<string> allocs_name; + string empty_sharding(1, '\0'); + string new_sharding = empty_sharding; + string resharding_ctrl; + int log_level = 30; + bool fsck_deep = false; + po::options_description po_options("Options"); + po_options.add_options() + ("help,h", "produce help message") + ("path", po::value<string>(&path), "bluestore path") + ("out-dir", po::value<string>(&out_dir), "output directory") + ("input-file", po::value<string>(&input_file), "import file") + ("dest-file", po::value<string>(&dest_file), "destination file") + ("log-file,l", po::value<string>(&log_file), "log file") + ("log-level", po::value<int>(&log_level), "log level (30=most, 20=lots, 10=some, 1=little)") + ("dev", po::value<vector<string>>(&devs), "device(s)") + ("devs-source", po::value<vector<string>>(&devs_source), "bluefs-dev-migrate source device(s)") + ("dev-target", po::value<string>(&dev_target), "target/resulting device") + ("deep", po::value<bool>(&fsck_deep), "deep fsck (read all data)") + ("key,k", po::value<string>(&key), "label metadata key name") + ("value,v", po::value<string>(&value), "label metadata value") + ("allocator", po::value<vector<string>>(&allocs_name), "allocator to inspect: 'block'/'bluefs-wal'/'bluefs-db'/'bluefs-slow'") + ("sharding", po::value<string>(&new_sharding), "new sharding to apply") + ("resharding-ctrl", po::value<string>(&resharding_ctrl), "gives control over resharding procedure details") + ; + po::options_description po_positional("Positional options"); + po_positional.add_options() + ("command", po::value<string>(&action), + "fsck, " + "repair, " + "quick-fix, " + "bluefs-export, " + "bluefs-import, " + "bluefs-bdev-sizes, " + "bluefs-bdev-expand, " + "bluefs-bdev-new-db, " + "bluefs-bdev-new-wal, " + "bluefs-bdev-migrate, " + "show-label, " + "set-label-key, " + "rm-label-key, " + "prime-osd-dir, " + "bluefs-log-dump, " + "free-dump, " + "free-score, " + "bluefs-stats, " + "reshard, " + "show-sharding") + ; + po::options_description po_all("All options"); + po_all.add(po_options).add(po_positional); + po::positional_options_description pd; + pd.add("command", 1); + + vector<string> ceph_option_strings; + po::variables_map vm; + try { + po::parsed_options parsed = + po::command_line_parser(argc, argv).options(po_all).allow_unregistered().positional(pd).run(); + po::store( parsed, vm); + po::notify(vm); + ceph_option_strings = po::collect_unrecognized(parsed.options, + po::include_positional); + } catch(po::error &e) { + std::cerr << e.what() << std::endl; + exit(EXIT_FAILURE); + } + // normalize path (remove ending '/' if any) + if (path.size() > 1 && *(path.end() - 1) == '/') { + path.resize(path.size() - 1); + } + if (vm.count("help")) { + usage(po_all); + exit(EXIT_SUCCESS); + } + if (action.empty()) { + cerr << "must specify an action; --help for help" << std::endl; + exit(EXIT_FAILURE); + } + + if (action == "fsck" || action == "repair" || action == "quick-fix") { + if (path.empty()) { + cerr << "must specify bluestore path" << std::endl; + exit(EXIT_FAILURE); + } + } + if (action == "prime-osd-dir") { + if (devs.size() != 1) { + cerr << "must specify the main bluestore device" << std::endl; + exit(EXIT_FAILURE); + } + if (path.empty()) { + cerr << "must specify osd dir to prime" << std::endl; + exit(EXIT_FAILURE); + } + } + if (action == "set-label-key" || + action == "rm-label-key") { + if (devs.size() != 1) { + cerr << "must specify the main bluestore device" << std::endl; + exit(EXIT_FAILURE); + } + if (key.size() == 0) { + cerr << "must specify a key name with -k" << std::endl; + exit(EXIT_FAILURE); + } + if (action == "set-label-key" && value.size() == 0) { + cerr << "must specify a value with -v" << std::endl; + exit(EXIT_FAILURE); + } + } + if (action == "show-label") { + if (devs.empty() && path.empty()) { + cerr << "must specify bluestore path *or* raw device(s)" << std::endl; + exit(EXIT_FAILURE); + } + if (devs.empty()) + inferring_bluefs_devices(devs, path); + } + if (action == "bluefs-export" || + action == "bluefs-import" || + action == "bluefs-log-dump") { + if (path.empty()) { + cerr << "must specify bluestore path" << std::endl; + exit(EXIT_FAILURE); + } + if ((action == "bluefs-export") && out_dir.empty()) { + cerr << "must specify out-dir to export bluefs" << std::endl; + exit(EXIT_FAILURE); + } + if (action == "bluefs-import" && input_file.empty()) { + cerr << "must specify input_file to import bluefs" << std::endl; + exit(EXIT_FAILURE); + } + if (action == "bluefs-import" && dest_file.empty()) { + cerr << "must specify dest_file to import bluefs" << std::endl; + exit(EXIT_FAILURE); + } + inferring_bluefs_devices(devs, path); + } + if (action == "bluefs-bdev-sizes" || action == "bluefs-bdev-expand") { + if (path.empty()) { + cerr << "must specify bluestore path" << std::endl; + exit(EXIT_FAILURE); + } + inferring_bluefs_devices(devs, path); + } + if (action == "bluefs-bdev-new-db" || action == "bluefs-bdev-new-wal") { + if (path.empty()) { + cerr << "must specify bluestore path" << std::endl; + exit(EXIT_FAILURE); + } + if (dev_target.empty()) { + cout << "NOTICE: --dev-target option omitted, will allocate as a file" << std::endl; + } + inferring_bluefs_devices(devs, path); + } + if (action == "bluefs-bdev-migrate") { + if (path.empty()) { + cerr << "must specify bluestore path" << std::endl; + exit(EXIT_FAILURE); + } + inferring_bluefs_devices(devs, path); + if (devs_source.size() == 0) { + cerr << "must specify source devices with --devs-source" << std::endl; + exit(EXIT_FAILURE); + } + if (dev_target.empty()) { + cerr << "must specify target device with --dev-target" << std::endl; + exit(EXIT_FAILURE); + } + } + if (action == "free-score" || action == "free-dump") { + if (path.empty()) { + cerr << "must specify bluestore path" << std::endl; + exit(EXIT_FAILURE); + } + for (auto name : allocs_name) { + if (!name.empty() && + name != "block" && + name != "bluefs-db" && + name != "bluefs-wal" && + name != "bluefs-slow") { + cerr << "unknown allocator '" << name << "'" << std::endl; + exit(EXIT_FAILURE); + } + } + if (allocs_name.empty()) + allocs_name = vector<string>{"block", "bluefs-db", "bluefs-wal", "bluefs-slow"}; + } + if (action == "reshard") { + if (path.empty()) { + cerr << "must specify bluestore path" << std::endl; + exit(EXIT_FAILURE); + } + if (new_sharding == empty_sharding) { + cerr << "must provide reshard specification" << std::endl; + exit(EXIT_FAILURE); + } + } + vector<const char*> args; + if (log_file.size()) { + args.push_back("--log-file"); + args.push_back(log_file.c_str()); + static char ll[10]; + snprintf(ll, sizeof(ll), "%d", log_level); + args.push_back("--debug-bluestore"); + args.push_back(ll); + args.push_back("--debug-bluefs"); + args.push_back(ll); + args.push_back("--debug-rocksdb"); + args.push_back(ll); + } + args.push_back("--no-log-to-stderr"); + args.push_back("--err-to-stderr"); + + for (auto& i : ceph_option_strings) { + args.push_back(i.c_str()); + } + auto cct = global_init(NULL, args, CEPH_ENTITY_TYPE_CLIENT, + CODE_ENVIRONMENT_UTILITY, + CINIT_FLAG_NO_DEFAULT_CONFIG_FILE); + + common_init_finish(cct.get()); + + if (action == "fsck" || + action == "repair" || + action == "quick-fix") { + validate_path(cct.get(), path, false); + BlueStore bluestore(cct.get(), path); + int r; + if (action == "fsck") { + r = bluestore.fsck(fsck_deep); + } else if (action == "repair") { + r = bluestore.repair(fsck_deep); + } else { + r = bluestore.quick_fix(); + } + if (r < 0) { + cerr << action << " failed: " << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } else if (r > 0) { + cerr << action << " status: remaining " << r << " error(s) and warning(s)" << std::endl; + exit(EXIT_FAILURE); + } else { + cout << action << " success" << std::endl; + } + } + else if (action == "prime-osd-dir") { + bluestore_bdev_label_t label; + int r = BlueStore::_read_bdev_label(cct.get(), devs.front(), &label); + if (r < 0) { + cerr << "failed to read label for " << devs.front() << ": " + << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + + // kludge some things into the map that we want to populate into + // target dir + label.meta["path_block"] = devs.front(); + label.meta["type"] = "bluestore"; + label.meta["fsid"] = stringify(label.osd_uuid); + + for (auto kk : { + "whoami", + "osd_key", + "ceph_fsid", + "fsid", + "type", + "ready" }) { + string k = kk; + auto i = label.meta.find(k); + if (i == label.meta.end()) { + continue; + } + string p = path + "/" + k; + string v = i->second; + if (k == "osd_key") { + p = path + "/keyring"; + v = "[osd."; + v += label.meta["whoami"]; + v += "]\nkey = " + i->second; + } + v += "\n"; + int fd = ::open(p.c_str(), O_CREAT|O_TRUNC|O_WRONLY|O_CLOEXEC, 0600); + if (fd < 0) { + cerr << "error writing " << p << ": " << cpp_strerror(errno) + << std::endl; + exit(EXIT_FAILURE); + } + int r = safe_write(fd, v.c_str(), v.size()); + if (r < 0) { + cerr << "error writing to " << p << ": " << cpp_strerror(errno) + << std::endl; + exit(EXIT_FAILURE); + } + ::close(fd); + } + } + else if (action == "show-label") { + JSONFormatter jf(true); + jf.open_object_section("devices"); + for (auto& i : devs) { + bluestore_bdev_label_t label; + int r = BlueStore::_read_bdev_label(cct.get(), i, &label); + if (r < 0) { + cerr << "unable to read label for " << i << ": " + << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + jf.open_object_section(i.c_str()); + label.dump(&jf); + jf.close_section(); + } + jf.close_section(); + jf.flush(cout); + } + else if (action == "set-label-key") { + bluestore_bdev_label_t label; + int r = BlueStore::_read_bdev_label(cct.get(), devs.front(), &label); + if (r < 0) { + cerr << "unable to read label for " << devs.front() << ": " + << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + if (key == "size") { + label.size = strtoull(value.c_str(), nullptr, 10); + } else if (key =="osd_uuid") { + label.osd_uuid.parse(value.c_str()); + } else if (key =="btime") { + uint64_t epoch; + uint64_t nsec; + int r = utime_t::parse_date(value.c_str(), &epoch, &nsec); + if (r == 0) { + label.btime = utime_t(epoch, nsec); + } + } else if (key =="description") { + label.description = value; + } else { + label.meta[key] = value; + } + r = BlueStore::_write_bdev_label(cct.get(), devs.front(), label); + if (r < 0) { + cerr << "unable to write label for " << devs.front() << ": " + << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + } + else if (action == "rm-label-key") { + bluestore_bdev_label_t label; + int r = BlueStore::_read_bdev_label(cct.get(), devs.front(), &label); + if (r < 0) { + cerr << "unable to read label for " << devs.front() << ": " + << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + if (!label.meta.count(key)) { + cerr << "key '" << key << "' not present" << std::endl; + exit(EXIT_FAILURE); + } + label.meta.erase(key); + r = BlueStore::_write_bdev_label(cct.get(), devs.front(), label); + if (r < 0) { + cerr << "unable to write label for " << devs.front() << ": " + << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + } + else if (action == "bluefs-bdev-sizes") { + BlueStore bluestore(cct.get(), path); + bluestore.dump_bluefs_sizes(cout); + } + else if (action == "bluefs-bdev-expand") { + BlueStore bluestore(cct.get(), path); + auto r = bluestore.expand_devices(cout); + if (r <0) { + cerr << "failed to expand bluestore devices: " + << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + } + else if (action == "bluefs-import") { + bluefs_import(input_file, dest_file, cct.get(), path, devs); + } + else if (action == "bluefs-export") { + BlueFS *fs = open_bluefs_readonly(cct.get(), path, devs); + + vector<string> dirs; + int r = fs->readdir("", &dirs); + if (r < 0) { + cerr << "readdir in root failed: " << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + + if (::access(out_dir.c_str(), F_OK)) { + r = ::mkdir(out_dir.c_str(), 0755); + if (r < 0) { + r = -errno; + cerr << "mkdir " << out_dir << " failed: " << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + } + + for (auto& dir : dirs) { + if (dir[0] == '.') + continue; + cout << dir << "/" << std::endl; + vector<string> ls; + r = fs->readdir(dir, &ls); + if (r < 0) { + cerr << "readdir " << dir << " failed: " << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + string full = out_dir + "/" + dir; + if (::access(full.c_str(), F_OK)) { + r = ::mkdir(full.c_str(), 0755); + if (r < 0) { + r = -errno; + cerr << "mkdir " << full << " failed: " << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + } + for (auto& file : ls) { + if (file[0] == '.') + continue; + cout << dir << "/" << file << std::endl; + uint64_t size; + utime_t mtime; + r = fs->stat(dir, file, &size, &mtime); + if (r < 0) { + cerr << "stat " << file << " failed: " << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + string path = out_dir + "/" + dir + "/" + file; + int fd = ::open(path.c_str(), O_CREAT|O_WRONLY|O_TRUNC|O_CLOEXEC, 0644); + if (fd < 0) { + r = -errno; + cerr << "open " << path << " failed: " << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + if (size > 0) { + BlueFS::FileReader *h; + r = fs->open_for_read(dir, file, &h, false); + if (r < 0) { + cerr << "open_for_read " << dir << "/" << file << " failed: " + << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + int pos = 0; + int left = size; + while (left) { + bufferlist bl; + r = fs->read(h, pos, left, &bl, NULL); + if (r <= 0) { + cerr << "read " << dir << "/" << file << " from " << pos + << " failed: " << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + int rc = bl.write_fd(fd); + if (rc < 0) { + cerr << "write to " << path << " failed: " + << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + pos += r; + left -= r; + } + delete h; + } + ::close(fd); + } + } + fs->umount(); + delete fs; + } else if (action == "bluefs-log-dump") { + log_dump(cct.get(), path, devs); + } else if (action == "bluefs-bdev-new-db" || action == "bluefs-bdev-new-wal") { + map<string, int> cur_devs_map; + bool need_db = action == "bluefs-bdev-new-db"; + + bool has_wal = false; + bool has_db = false; + char target_path[PATH_MAX] = ""; + + parse_devices(cct.get(), devs, &cur_devs_map, &has_db, &has_wal); + + const char* rlpath = nullptr; + if (has_db && has_wal) { + cerr << "can't allocate new device, both WAL and DB exist" + << std::endl; + exit(EXIT_FAILURE); + } else if (need_db && has_db) { + cerr << "can't allocate new DB device, already exists" + << std::endl; + exit(EXIT_FAILURE); + } else if (!need_db && has_wal) { + cerr << "can't allocate new WAL device, already exists" + << std::endl; + exit(EXIT_FAILURE); + } else if(!dev_target.empty() && + (rlpath = realpath(dev_target.c_str(), target_path)) == nullptr) { + cerr << "failed to retrieve absolute path for " << dev_target + << ": " << cpp_strerror(errno) + << std::endl; + exit(EXIT_FAILURE); + } + + // Attach either DB or WAL volume, create if needed + struct stat st; + int r = -1; + if (rlpath != nullptr) { + r = ::stat(rlpath, &st); + } + // check if we need additional size specification + if (r == -1 || (r == 0 && S_ISREG(st.st_mode) && st.st_size == 0)) { + r = 0; + if (need_db && cct->_conf->bluestore_block_db_size == 0) { + cerr << "Might need DB size specification, " + "please set Ceph bluestore-block-db-size config parameter " + << std::endl; + r = EXIT_FAILURE; + } else if (!need_db && cct->_conf->bluestore_block_wal_size == 0) { + cerr << "Might need WAL size specification, " + "please set Ceph bluestore-block-wal-size config parameter " + << std::endl; + r = EXIT_FAILURE; + } + } + if (r == 0) { + BlueStore bluestore(cct.get(), path); + r = bluestore.add_new_bluefs_device( + need_db ? BlueFS::BDEV_NEWDB : BlueFS::BDEV_NEWWAL, + target_path); + if (r == 0) { + cout << (need_db ? "DB" : "WAL") << " device added " << target_path + << std::endl; + } else { + cerr << "failed to add " << (need_db ? "DB" : "WAL") << " device:" + << cpp_strerror(r) + << std::endl; + } + } + return r; + } else if (action == "bluefs-bdev-migrate") { + map<string, int> cur_devs_map; + set<int> src_dev_ids; + map<string, int> src_devs; + + parse_devices(cct.get(), devs, &cur_devs_map, nullptr, nullptr); + for (auto& s : devs_source) { + auto i = cur_devs_map.find(s); + if (i != cur_devs_map.end()) { + if (s == dev_target) { + cerr << "Device " << dev_target + << " is present in both source and target lists, omitted." + << std::endl; + } else { + src_devs.emplace(*i); + src_dev_ids.emplace(i->second); + } + } else { + cerr << "can't migrate " << s << ", not a valid bluefs volume " + << std::endl; + exit(EXIT_FAILURE); + } + } + + auto i = cur_devs_map.find(dev_target); + + if (i != cur_devs_map.end()) { + // Migrate to an existing BlueFS volume + + auto dev_target_id = i->second; + if (dev_target_id == BlueFS::BDEV_WAL) { + // currently we're unable to migrate to WAL device since there is no space + // reserved for superblock + cerr << "Migrate to WAL device isn't supported." << std::endl; + exit(EXIT_FAILURE); + } + + BlueStore bluestore(cct.get(), path); + int r = bluestore.migrate_to_existing_bluefs_device( + src_dev_ids, + dev_target_id); + if (r == 0) { + for(auto src : src_devs) { + if (src.second != BlueFS::BDEV_SLOW) { + cout << " device removed:" << src.second << " " << src.first + << std::endl; + } + } + } else { + bool need_db = dev_target_id == BlueFS::BDEV_DB; + cerr << "failed to migrate to existing BlueFS device: " + << (need_db ? BlueFS::BDEV_DB : BlueFS::BDEV_WAL) + << " " << dev_target + << cpp_strerror(r) + << std::endl; + } + return r; + } else { + // Migrate to a new BlueFS volume + // via creating either DB or WAL volume + char target_path[PATH_MAX] = ""; + int dev_target_id; + if (src_dev_ids.count(BlueFS::BDEV_DB)) { + // if we have DB device in the source list - we create DB device + // (and may be remove WAL). + dev_target_id = BlueFS::BDEV_NEWDB; + } else if (src_dev_ids.count(BlueFS::BDEV_WAL)) { + dev_target_id = BlueFS::BDEV_NEWWAL; + } else { + cerr << "Unable to migrate Slow volume to new location, " + "please allocate new DB or WAL with " + "--bluefs-bdev-new-db(wal) command" + << std::endl; + exit(EXIT_FAILURE); + } + if(!dev_target.empty() && + realpath(dev_target.c_str(), target_path) == nullptr) { + cerr << "failed to retrieve absolute path for " << dev_target + << ": " << cpp_strerror(errno) + << std::endl; + exit(EXIT_FAILURE); + } + + BlueStore bluestore(cct.get(), path); + + bool need_db = dev_target_id == BlueFS::BDEV_NEWDB; + int r = bluestore.migrate_to_new_bluefs_device( + src_dev_ids, + dev_target_id, + target_path); + if (r == 0) { + for(auto src : src_devs) { + if (src.second != BlueFS::BDEV_SLOW) { + cout << " device removed:" << src.second << " " << src.first + << std::endl; + } + } + cout << " device added: " + << (need_db ? BlueFS::BDEV_DB : BlueFS::BDEV_DB) + << " " << target_path + << std::endl; + } else { + cerr << "failed to migrate to new BlueFS device: " + << (need_db ? BlueFS::BDEV_DB : BlueFS::BDEV_DB) + << " " << target_path + << cpp_strerror(r) + << std::endl; + } + return r; + } + } else if (action == "free-dump" || action == "free-score") { + AdminSocket *admin_socket = g_ceph_context->get_admin_socket(); + ceph_assert(admin_socket); + std::string action_name = action == "free-dump" ? "dump" : "score"; + validate_path(cct.get(), path, false); + BlueStore bluestore(cct.get(), path); + int r = bluestore.cold_open(); + if (r < 0) { + cerr << "error from cold_open: " << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + + for (auto alloc_name : allocs_name) { + ceph::bufferlist in, out; + ostringstream err; + int r = admin_socket->execute_command( + {"{\"prefix\": \"bluestore allocator " + action_name + " " + alloc_name + "\"}"}, + in, err, &out); + if (r != 0) { + cerr << "failure querying '" << alloc_name << "'" << std::endl; + exit(EXIT_FAILURE); + } + cout << alloc_name << ":" << std::endl; + cout << std::string(out.c_str(),out.length()) << std::endl; + } + + bluestore.cold_close(); + } else if (action == "bluefs-stats") { + AdminSocket* admin_socket = g_ceph_context->get_admin_socket(); + ceph_assert(admin_socket); + validate_path(cct.get(), path, false); + BlueStore bluestore(cct.get(), path); + int r = bluestore.cold_open(); + if (r < 0) { + cerr << "error from cold_open: " << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + + ceph::bufferlist in, out; + ostringstream err; + r = admin_socket->execute_command( + { "{\"prefix\": \"bluefs stats\"}" }, + in, err, &out); + if (r != 0) { + cerr << "failure querying bluefs stats: " << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + cout << std::string(out.c_str(), out.length()) << std::endl; + bluestore.cold_close(); + } else if (action == "reshard") { + auto get_ctrl = [&](size_t& val) { + if (!resharding_ctrl.empty()) { + size_t pos; + std::string token; + pos = resharding_ctrl.find('/'); + token = resharding_ctrl.substr(0, pos); + if (pos != std::string::npos) + resharding_ctrl.erase(0, pos + 1); + else + resharding_ctrl.erase(); + char* endptr; + val = strtoll(token.c_str(), &endptr, 0); + if (*endptr != '\0') { + cerr << "invalid --resharding-ctrl. '" << token << "' is not a number" << std::endl; + exit(EXIT_FAILURE); + } + } + }; + BlueStore bluestore(cct.get(), path); + KeyValueDB *db_ptr; + RocksDBStore::resharding_ctrl ctrl; + if (!resharding_ctrl.empty()) { + get_ctrl(ctrl.bytes_per_iterator); + get_ctrl(ctrl.keys_per_iterator); + get_ctrl(ctrl.bytes_per_batch); + get_ctrl(ctrl.keys_per_batch); + if (!resharding_ctrl.empty()) { + cerr << "extra chars in --resharding-ctrl" << std::endl; + exit(EXIT_FAILURE); + } + } + int r = bluestore.open_db_environment(&db_ptr, true); + if (r < 0) { + cerr << "error preparing db environment: " << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + ceph_assert(db_ptr); + RocksDBStore* rocks_db = dynamic_cast<RocksDBStore*>(db_ptr); + ceph_assert(rocks_db); + r = rocks_db->reshard(new_sharding, &ctrl); + if (r < 0) { + cerr << "error resharding: " << cpp_strerror(r) << std::endl; + } else { + cout << "reshard success" << std::endl; + } + bluestore.close_db_environment(); + } else if (action == "show-sharding") { + BlueStore bluestore(cct.get(), path); + KeyValueDB *db_ptr; + int r = bluestore.open_db_environment(&db_ptr, false); + if (r < 0) { + cerr << "error preparing db environment: " << cpp_strerror(r) << std::endl; + exit(EXIT_FAILURE); + } + ceph_assert(db_ptr); + RocksDBStore* rocks_db = dynamic_cast<RocksDBStore*>(db_ptr); + ceph_assert(rocks_db); + std::string sharding; + bool res = rocks_db->get_sharding(sharding); + bluestore.close_db_environment(); + if (!res) { + cerr << "failed to retrieve sharding def" << std::endl; + exit(EXIT_FAILURE); + } + cout << sharding << std::endl; + } else { + cerr << "unrecognized action " << action << std::endl; + return 1; + } + + return 0; +} diff --git a/src/os/bluestore/bluestore_types.cc b/src/os/bluestore/bluestore_types.cc new file mode 100644 index 000000000..b62f6e2a3 --- /dev/null +++ b/src/os/bluestore/bluestore_types.cc @@ -0,0 +1,1279 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab +/* + * Ceph - scalable distributed file system + * + * Copyright (C) 2014 Red Hat + * + * This is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License version 2.1, as published by the Free Software + * Foundation. See file COPYING. + * + */ + +#include "bluestore_types.h" +#include "common/Formatter.h" +#include "common/Checksummer.h" +#include "include/stringify.h" + +using std::list; +using std::map; +using std::make_pair; +using std::ostream; +using std::string; + +using ceph::bufferlist; +using ceph::bufferptr; +using ceph::Formatter; + +// bluestore_bdev_label_t + +void bluestore_bdev_label_t::encode(bufferlist& bl) const +{ + // be slightly friendly to someone who looks at the device + bl.append("bluestore block device\n"); + bl.append(stringify(osd_uuid)); + bl.append("\n"); + ENCODE_START(2, 1, bl); + encode(osd_uuid, bl); + encode(size, bl); + encode(btime, bl); + encode(description, bl); + encode(meta, bl); + ENCODE_FINISH(bl); +} + +void bluestore_bdev_label_t::decode(bufferlist::const_iterator& p) +{ + p += 60u; // see above + DECODE_START(2, p); + decode(osd_uuid, p); + decode(size, p); + decode(btime, p); + decode(description, p); + if (struct_v >= 2) { + decode(meta, p); + } + DECODE_FINISH(p); +} + +void bluestore_bdev_label_t::dump(Formatter *f) const +{ + f->dump_stream("osd_uuid") << osd_uuid; + f->dump_unsigned("size", size); + f->dump_stream("btime") << btime; + f->dump_string("description", description); + for (auto& i : meta) { + f->dump_string(i.first.c_str(), i.second); + } +} + +void bluestore_bdev_label_t::generate_test_instances( + list<bluestore_bdev_label_t*>& o) +{ + o.push_back(new bluestore_bdev_label_t); + o.push_back(new bluestore_bdev_label_t); + o.back()->size = 123; + o.back()->btime = utime_t(4, 5); + o.back()->description = "fakey"; + o.back()->meta["foo"] = "bar"; +} + +ostream& operator<<(ostream& out, const bluestore_bdev_label_t& l) +{ + return out << "bdev(osd_uuid " << l.osd_uuid + << ", size 0x" << std::hex << l.size << std::dec + << ", btime " << l.btime + << ", desc " << l.description + << ", " << l.meta.size() << " meta" + << ")"; +} + +// cnode_t + +void bluestore_cnode_t::dump(Formatter *f) const +{ + f->dump_unsigned("bits", bits); +} + +void bluestore_cnode_t::generate_test_instances(list<bluestore_cnode_t*>& o) +{ + o.push_back(new bluestore_cnode_t()); + o.push_back(new bluestore_cnode_t(0)); + o.push_back(new bluestore_cnode_t(123)); +} + +ostream& operator<<(ostream& out, const bluestore_cnode_t& l) +{ + return out << "cnode(bits " << l.bits << ")"; +} + +// bluestore_extent_ref_map_t + +void bluestore_extent_ref_map_t::_check() const +{ + uint64_t pos = 0; + unsigned refs = 0; + for (const auto &p : ref_map) { + if (p.first < pos) + ceph_abort_msg("overlap"); + if (p.first == pos && p.second.refs == refs) + ceph_abort_msg("unmerged"); + pos = p.first + p.second.length; + refs = p.second.refs; + } +} + +void bluestore_extent_ref_map_t::_maybe_merge_left( + map<uint64_t,record_t>::iterator& p) +{ + if (p == ref_map.begin()) + return; + auto q = p; + --q; + if (q->second.refs == p->second.refs && + q->first + q->second.length == p->first) { + q->second.length += p->second.length; + ref_map.erase(p); + p = q; + } +} + +void bluestore_extent_ref_map_t::get(uint64_t offset, uint32_t length) +{ + auto p = ref_map.lower_bound(offset); + if (p != ref_map.begin()) { + --p; + if (p->first + p->second.length <= offset) { + ++p; + } + } + while (length > 0) { + if (p == ref_map.end()) { + // nothing after offset; add the whole thing. + p = ref_map.insert( + map<uint64_t,record_t>::value_type(offset, record_t(length, 1))).first; + break; + } + if (p->first > offset) { + // gap + uint64_t newlen = std::min<uint64_t>(p->first - offset, length); + p = ref_map.insert( + map<uint64_t,record_t>::value_type(offset, + record_t(newlen, 1))).first; + offset += newlen; + length -= newlen; + _maybe_merge_left(p); + ++p; + continue; + } + if (p->first < offset) { + // split off the portion before offset + ceph_assert(p->first + p->second.length > offset); + uint64_t left = p->first + p->second.length - offset; + p->second.length = offset - p->first; + p = ref_map.insert(map<uint64_t,record_t>::value_type( + offset, record_t(left, p->second.refs))).first; + // continue below + } + ceph_assert(p->first == offset); + if (length < p->second.length) { + ref_map.insert(make_pair(offset + length, + record_t(p->second.length - length, + p->second.refs))); + p->second.length = length; + ++p->second.refs; + break; + } + ++p->second.refs; + offset += p->second.length; + length -= p->second.length; + _maybe_merge_left(p); + ++p; + } + if (p != ref_map.end()) + _maybe_merge_left(p); + //_check(); +} + +void bluestore_extent_ref_map_t::put( + uint64_t offset, uint32_t length, + PExtentVector *release, + bool *maybe_unshared) +{ + //NB: existing entries in 'release' container must be preserved! + bool unshared = true; + auto p = ref_map.lower_bound(offset); + if (p == ref_map.end() || p->first > offset) { + if (p == ref_map.begin()) { + ceph_abort_msg("put on missing extent (nothing before)"); + } + --p; + if (p->first + p->second.length <= offset) { + ceph_abort_msg("put on missing extent (gap)"); + } + } + if (p->first < offset) { + uint64_t left = p->first + p->second.length - offset; + p->second.length = offset - p->first; + if (p->second.refs != 1) { + unshared = false; + } + p = ref_map.insert(map<uint64_t,record_t>::value_type( + offset, record_t(left, p->second.refs))).first; + } + while (length > 0) { + ceph_assert(p->first == offset); + if (length < p->second.length) { + if (p->second.refs != 1) { + unshared = false; + } + ref_map.insert(make_pair(offset + length, + record_t(p->second.length - length, + p->second.refs))); + if (p->second.refs > 1) { + p->second.length = length; + --p->second.refs; + if (p->second.refs != 1) { + unshared = false; + } + _maybe_merge_left(p); + } else { + if (release) + release->push_back(bluestore_pextent_t(p->first, length)); + ref_map.erase(p); + } + goto out; + } + offset += p->second.length; + length -= p->second.length; + if (p->second.refs > 1) { + --p->second.refs; + if (p->second.refs != 1) { + unshared = false; + } + _maybe_merge_left(p); + ++p; + } else { + if (release) + release->push_back(bluestore_pextent_t(p->first, p->second.length)); + ref_map.erase(p++); + } + } + if (p != ref_map.end()) + _maybe_merge_left(p); + //_check(); +out: + if (maybe_unshared) { + if (unshared) { + // we haven't seen a ref != 1 yet; check the whole map. + for (auto& p : ref_map) { + if (p.second.refs != 1) { + unshared = false; + break; + } + } + } + *maybe_unshared = unshared; + } +} + +bool bluestore_extent_ref_map_t::contains(uint64_t offset, uint32_t length) const +{ + auto p = ref_map.lower_bound(offset); + if (p == ref_map.end() || p->first > offset) { + if (p == ref_map.begin()) { + return false; // nothing before + } + --p; + if (p->first + p->second.length <= offset) { + return false; // gap + } + } + while (length > 0) { + if (p == ref_map.end()) + return false; + if (p->first > offset) + return false; + if (p->first + p->second.length >= offset + length) + return true; + uint64_t overlap = p->first + p->second.length - offset; + offset += overlap; + length -= overlap; + ++p; + } + return true; +} + +bool bluestore_extent_ref_map_t::intersects( + uint64_t offset, + uint32_t length) const +{ + auto p = ref_map.lower_bound(offset); + if (p != ref_map.begin()) { + --p; + if (p->first + p->second.length <= offset) { + ++p; + } + } + if (p == ref_map.end()) + return false; + if (p->first >= offset + length) + return false; + return true; // intersects p! +} + +void bluestore_extent_ref_map_t::dump(Formatter *f) const +{ + f->open_array_section("ref_map"); + for (auto& p : ref_map) { + f->open_object_section("ref"); + f->dump_unsigned("offset", p.first); + f->dump_unsigned("length", p.second.length); + f->dump_unsigned("refs", p.second.refs); + f->close_section(); + } + f->close_section(); +} + +void bluestore_extent_ref_map_t::generate_test_instances( + list<bluestore_extent_ref_map_t*>& o) +{ + o.push_back(new bluestore_extent_ref_map_t); + o.push_back(new bluestore_extent_ref_map_t); + o.back()->get(10, 10); + o.back()->get(18, 22); + o.back()->get(20, 20); + o.back()->get(10, 25); + o.back()->get(15, 20); +} + +ostream& operator<<(ostream& out, const bluestore_extent_ref_map_t& m) +{ + out << "ref_map("; + for (auto p = m.ref_map.begin(); p != m.ref_map.end(); ++p) { + if (p != m.ref_map.begin()) + out << ","; + out << std::hex << "0x" << p->first << "~" << p->second.length << std::dec + << "=" << p->second.refs; + } + out << ")"; + return out; +} + +// bluestore_blob_use_tracker_t +bluestore_blob_use_tracker_t::bluestore_blob_use_tracker_t( + const bluestore_blob_use_tracker_t& tracker) + : au_size{tracker.au_size}, + num_au(0), + alloc_au(0), + bytes_per_au{nullptr} +{ + if (tracker.num_au > 0) { + allocate(tracker.num_au); + std::copy(tracker.bytes_per_au, tracker.bytes_per_au + num_au, bytes_per_au); + } else { + total_bytes = tracker.total_bytes; + } +} + +bluestore_blob_use_tracker_t& +bluestore_blob_use_tracker_t::operator=(const bluestore_blob_use_tracker_t& rhs) +{ + if (this == &rhs) { + return *this; + } + clear(); + au_size = rhs.au_size; + if (rhs.num_au > 0) { + allocate( rhs.num_au); + std::copy(rhs.bytes_per_au, rhs.bytes_per_au + num_au, bytes_per_au); + } else { + total_bytes = rhs.total_bytes; + } + return *this; +} + +void bluestore_blob_use_tracker_t::allocate(uint32_t au_count) +{ + ceph_assert(au_count != 0); + ceph_assert(num_au == 0); + ceph_assert(alloc_au == 0); + num_au = alloc_au = au_count; + bytes_per_au = new uint32_t[alloc_au]; + mempool::get_pool( + mempool::pool_index_t(mempool::mempool_bluestore_cache_other)). + adjust_count(alloc_au, sizeof(uint32_t) * alloc_au); + + for (uint32_t i = 0; i < num_au; ++i) { + bytes_per_au[i] = 0; + } +} + +void bluestore_blob_use_tracker_t::release(uint32_t au_count, uint32_t* ptr) { + if (au_count) { + delete[] ptr; + mempool::get_pool( + mempool::pool_index_t(mempool::mempool_bluestore_cache_other)). + adjust_count(-(int32_t)au_count, -(int32_t)(sizeof(uint32_t) * au_count)); + } +} + +void bluestore_blob_use_tracker_t::init( + uint32_t full_length, uint32_t _au_size) { + ceph_assert(!au_size || is_empty()); + ceph_assert(_au_size > 0); + ceph_assert(full_length > 0); + clear(); + uint32_t _num_au = round_up_to(full_length, _au_size) / _au_size; + au_size = _au_size; + if ( _num_au > 1 ) { + allocate(_num_au); + } +} + +void bluestore_blob_use_tracker_t::get( + uint32_t offset, uint32_t length) +{ + ceph_assert(au_size); + if (!num_au) { + total_bytes += length; + } else { + auto end = offset + length; + + while (offset < end) { + auto phase = offset % au_size; + bytes_per_au[offset / au_size] += + std::min(au_size - phase, end - offset); + offset += (phase ? au_size - phase : au_size); + } + } +} + +bool bluestore_blob_use_tracker_t::put( + uint32_t offset, uint32_t length, + PExtentVector *release_units) +{ + ceph_assert(au_size); + if (release_units) { + release_units->clear(); + } + bool maybe_empty = true; + if (!num_au) { + ceph_assert(total_bytes >= length); + total_bytes -= length; + } else { + auto end = offset + length; + uint64_t next_offs = 0; + while (offset < end) { + auto phase = offset % au_size; + size_t pos = offset / au_size; + auto diff = std::min(au_size - phase, end - offset); + ceph_assert(diff <= bytes_per_au[pos]); + bytes_per_au[pos] -= diff; + offset += (phase ? au_size - phase : au_size); + if (bytes_per_au[pos] == 0) { + if (release_units) { + if (release_units->empty() || next_offs != pos * au_size) { + release_units->emplace_back(pos * au_size, au_size); + next_offs = pos * au_size; + } else { + release_units->back().length += au_size; + } + next_offs += au_size; + } + } else { + maybe_empty = false; // micro optimization detecting we aren't empty + // even in the affected extent + } + } + } + bool empty = maybe_empty ? !is_not_empty() : false; + if (empty && release_units) { + release_units->clear(); + } + return empty; +} + +bool bluestore_blob_use_tracker_t::can_split() const +{ + return num_au > 0; +} + +bool bluestore_blob_use_tracker_t::can_split_at(uint32_t blob_offset) const +{ + ceph_assert(au_size); + return (blob_offset % au_size) == 0 && + blob_offset < num_au * au_size; +} + +void bluestore_blob_use_tracker_t::split( + uint32_t blob_offset, + bluestore_blob_use_tracker_t* r) +{ + ceph_assert(au_size); + ceph_assert(can_split()); + ceph_assert(can_split_at(blob_offset)); + ceph_assert(r->is_empty()); + + uint32_t new_num_au = blob_offset / au_size; + r->init( (num_au - new_num_au) * au_size, au_size); + + for (auto i = new_num_au; i < num_au; i++) { + r->get((i - new_num_au) * au_size, bytes_per_au[i]); + bytes_per_au[i] = 0; + } + if (new_num_au == 0) { + clear(); + } else if (new_num_au == 1) { + uint32_t tmp = bytes_per_au[0]; + uint32_t _au_size = au_size; + clear(); + au_size = _au_size; + total_bytes = tmp; + } else { + num_au = new_num_au; + } +} + +bool bluestore_blob_use_tracker_t::equal( + const bluestore_blob_use_tracker_t& other) const +{ + if (!num_au && !other.num_au) { + return total_bytes == other.total_bytes && au_size == other.au_size; + } else if (num_au && other.num_au) { + if (num_au != other.num_au || au_size != other.au_size) { + return false; + } + for (size_t i = 0; i < num_au; i++) { + if (bytes_per_au[i] != other.bytes_per_au[i]) { + return false; + } + } + return true; + } + + uint32_t n = num_au ? num_au : other.num_au; + uint32_t referenced = + num_au ? other.get_referenced_bytes() : get_referenced_bytes(); + auto bytes_per_au_tmp = num_au ? bytes_per_au : other.bytes_per_au; + uint32_t my_referenced = 0; + for (size_t i = 0; i < n; i++) { + my_referenced += bytes_per_au_tmp[i]; + if (my_referenced > referenced) { + return false; + } + } + return my_referenced == referenced; +} + +void bluestore_blob_use_tracker_t::dump(Formatter *f) const +{ + f->dump_unsigned("num_au", num_au); + f->dump_unsigned("au_size", au_size); + if (!num_au) { + f->dump_unsigned("total_bytes", total_bytes); + } else { + f->open_array_section("bytes_per_au"); + for (size_t i = 0; i < num_au; ++i) { + f->dump_unsigned("", bytes_per_au[i]); + } + f->close_section(); + } +} + +void bluestore_blob_use_tracker_t::generate_test_instances( + list<bluestore_blob_use_tracker_t*>& o) +{ + o.push_back(new bluestore_blob_use_tracker_t()); + o.back()->init(16, 16); + o.back()->get(10, 10); + o.back()->get(10, 5); + o.push_back(new bluestore_blob_use_tracker_t()); + o.back()->init(60, 16); + o.back()->get(18, 22); + o.back()->get(20, 20); + o.back()->get(15, 20); +} + +ostream& operator<<(ostream& out, const bluestore_blob_use_tracker_t& m) +{ + out << "use_tracker(" << std::hex; + if (!m.num_au) { + out << "0x" << m.au_size + << " " + << "0x" << m.total_bytes; + } else { + out << "0x" << m.num_au + << "*0x" << m.au_size + << " 0x["; + for (size_t i = 0; i < m.num_au; ++i) { + if (i != 0) + out << ","; + out << m.bytes_per_au[i]; + } + out << "]"; + } + out << std::dec << ")"; + return out; +} + +// bluestore_pextent_t + +void bluestore_pextent_t::dump(Formatter *f) const +{ + f->dump_unsigned("offset", offset); + f->dump_unsigned("length", length); +} + +ostream& operator<<(ostream& out, const bluestore_pextent_t& o) { + if (o.is_valid()) + return out << "0x" << std::hex << o.offset << "~" << o.length << std::dec; + else + return out << "!~" << std::hex << o.length << std::dec; +} + +void bluestore_pextent_t::generate_test_instances(list<bluestore_pextent_t*>& ls) +{ + ls.push_back(new bluestore_pextent_t); + ls.push_back(new bluestore_pextent_t(1, 2)); +} + +// bluestore_blob_t + +string bluestore_blob_t::get_flags_string(unsigned flags) +{ + string s; + if (flags & FLAG_COMPRESSED) { + if (s.length()) + s += '+'; + s += "compressed"; + } + if (flags & FLAG_CSUM) { + if (s.length()) + s += '+'; + s += "csum"; + } + if (flags & FLAG_HAS_UNUSED) { + if (s.length()) + s += '+'; + s += "has_unused"; + } + if (flags & FLAG_SHARED) { + if (s.length()) + s += '+'; + s += "shared"; + } + + return s; +} + +size_t bluestore_blob_t::get_csum_value_size() const +{ + return Checksummer::get_csum_value_size(csum_type); +} + +void bluestore_blob_t::dump(Formatter *f) const +{ + f->open_array_section("extents"); + for (auto& p : extents) { + f->dump_object("extent", p); + } + f->close_section(); + f->dump_unsigned("logical_length", logical_length); + f->dump_unsigned("compressed_length", compressed_length); + f->dump_unsigned("flags", flags); + f->dump_unsigned("csum_type", csum_type); + f->dump_unsigned("csum_chunk_order", csum_chunk_order); + f->open_array_section("csum_data"); + size_t n = get_csum_count(); + for (unsigned i = 0; i < n; ++i) + f->dump_unsigned("csum", get_csum_item(i)); + f->close_section(); + f->dump_unsigned("unused", unused); +} + +void bluestore_blob_t::generate_test_instances(list<bluestore_blob_t*>& ls) +{ + ls.push_back(new bluestore_blob_t); + ls.push_back(new bluestore_blob_t(0)); + ls.push_back(new bluestore_blob_t); + ls.back()->allocated_test(bluestore_pextent_t(111, 222)); + ls.push_back(new bluestore_blob_t); + ls.back()->init_csum(Checksummer::CSUM_XXHASH32, 16, 65536); + ls.back()->csum_data = ceph::buffer::claim_malloc(4, strdup("abcd")); + ls.back()->add_unused(0, 3); + ls.back()->add_unused(8, 8); + ls.back()->allocated_test(bluestore_pextent_t(0x40100000, 0x10000)); + ls.back()->allocated_test( + bluestore_pextent_t(bluestore_pextent_t::INVALID_OFFSET, 0x1000)); + ls.back()->allocated_test(bluestore_pextent_t(0x40120000, 0x10000)); +} + +ostream& operator<<(ostream& out, const bluestore_blob_t& o) +{ + out << "blob(" << o.get_extents(); + if (o.is_compressed()) { + out << " clen 0x" << std::hex + << o.get_logical_length() + << " -> 0x" + << o.get_compressed_payload_length() + << std::dec; + } + if (o.flags) { + out << " " << o.get_flags_string(); + } + if (o.has_csum()) { + out << " " << Checksummer::get_csum_type_string(o.csum_type) + << "/0x" << std::hex << (1ull << o.csum_chunk_order) << std::dec; + } + if (o.has_unused()) + out << " unused=0x" << std::hex << o.unused << std::dec; + out << ")"; + return out; +} + +void bluestore_blob_t::calc_csum(uint64_t b_off, const bufferlist& bl) +{ + switch (csum_type) { + case Checksummer::CSUM_XXHASH32: + Checksummer::calculate<Checksummer::xxhash32>( + get_csum_chunk_size(), b_off, bl.length(), bl, &csum_data); + break; + case Checksummer::CSUM_XXHASH64: + Checksummer::calculate<Checksummer::xxhash64>( + get_csum_chunk_size(), b_off, bl.length(), bl, &csum_data); + break;; + case Checksummer::CSUM_CRC32C: + Checksummer::calculate<Checksummer::crc32c>( + get_csum_chunk_size(), b_off, bl.length(), bl, &csum_data); + break; + case Checksummer::CSUM_CRC32C_16: + Checksummer::calculate<Checksummer::crc32c_16>( + get_csum_chunk_size(), b_off, bl.length(), bl, &csum_data); + break; + case Checksummer::CSUM_CRC32C_8: + Checksummer::calculate<Checksummer::crc32c_8>( + get_csum_chunk_size(), b_off, bl.length(), bl, &csum_data); + break; + } +} + +int bluestore_blob_t::verify_csum(uint64_t b_off, const bufferlist& bl, + int* b_bad_off, uint64_t *bad_csum) const +{ + int r = 0; + + *b_bad_off = -1; + switch (csum_type) { + case Checksummer::CSUM_NONE: + break; + case Checksummer::CSUM_XXHASH32: + *b_bad_off = Checksummer::verify<Checksummer::xxhash32>( + get_csum_chunk_size(), b_off, bl.length(), bl, csum_data, bad_csum); + break; + case Checksummer::CSUM_XXHASH64: + *b_bad_off = Checksummer::verify<Checksummer::xxhash64>( + get_csum_chunk_size(), b_off, bl.length(), bl, csum_data, bad_csum); + break; + case Checksummer::CSUM_CRC32C: + *b_bad_off = Checksummer::verify<Checksummer::crc32c>( + get_csum_chunk_size(), b_off, bl.length(), bl, csum_data, bad_csum); + break; + case Checksummer::CSUM_CRC32C_16: + *b_bad_off = Checksummer::verify<Checksummer::crc32c_16>( + get_csum_chunk_size(), b_off, bl.length(), bl, csum_data, bad_csum); + break; + case Checksummer::CSUM_CRC32C_8: + *b_bad_off = Checksummer::verify<Checksummer::crc32c_8>( + get_csum_chunk_size(), b_off, bl.length(), bl, csum_data, bad_csum); + break; + default: + r = -EOPNOTSUPP; + break; + } + + if (r < 0) + return r; + else if (*b_bad_off >= 0) + return -1; // bad checksum + else + return 0; +} + +void bluestore_blob_t::allocated(uint32_t b_off, uint32_t length, const PExtentVector& allocs) +{ + if (extents.size() == 0) { + // if blob is compressed then logical length to be already configured + // otherwise - to be unset. + ceph_assert((is_compressed() && logical_length != 0) || + (!is_compressed() && logical_length == 0)); + + extents.reserve(allocs.size() + (b_off ? 1 : 0)); + if (b_off) { + extents.emplace_back( + bluestore_pextent_t(bluestore_pextent_t::INVALID_OFFSET, b_off)); + + } + uint32_t new_len = b_off; + for (auto& a : allocs) { + extents.emplace_back(a.offset, a.length); + new_len += a.length; + } + if (!is_compressed()) { + logical_length = new_len; + } + } else { + ceph_assert(!is_compressed()); // partial allocations are forbidden when + // compressed + ceph_assert(b_off < logical_length); + uint32_t cur_offs = 0; + auto start_it = extents.begin(); + size_t pos = 0; + while (true) { + ceph_assert(start_it != extents.end()); + if (cur_offs + start_it->length > b_off) { + break; + } + cur_offs += start_it->length; + ++start_it; + ++pos; + } + uint32_t head = b_off - cur_offs; + uint32_t end_off = b_off + length; + auto end_it = start_it; + + while (true) { + ceph_assert(end_it != extents.end()); + ceph_assert(!end_it->is_valid()); + if (cur_offs + end_it->length >= end_off) { + break; + } + cur_offs += end_it->length; + ++end_it; + } + ceph_assert(cur_offs + end_it->length >= end_off); + uint32_t tail = cur_offs + end_it->length - end_off; + + start_it = extents.erase(start_it, end_it + 1); + size_t count = allocs.size(); + count += head ? 1 : 0; + count += tail ? 1 : 0; + extents.insert(start_it, + count, + bluestore_pextent_t( + bluestore_pextent_t::INVALID_OFFSET, 0)); + + // Workaround to resolve lack of proper iterator return in vector::insert + // Looks like some gcc/stl implementations still lack it despite c++11 + // support claim + start_it = extents.begin() + pos; + + if (head) { + start_it->length = head; + ++start_it; + } + for(auto& e : allocs) { + *start_it = e; + ++start_it; + } + if (tail) { + start_it->length = tail; + } + } +} + +// cut it out of extents +struct vecbuilder { + PExtentVector v; + uint64_t invalid = 0; + + void add_invalid(uint64_t length) { + invalid += length; + } + void flush() { + if (invalid) { + v.emplace_back(bluestore_pextent_t(bluestore_pextent_t::INVALID_OFFSET, + invalid)); + + invalid = 0; + } + } + void add(uint64_t offset, uint64_t length) { + if (offset == bluestore_pextent_t::INVALID_OFFSET) { + add_invalid(length); + } + else { + flush(); + v.emplace_back(offset, length); + } + } +}; + +void bluestore_blob_t::allocated_test(const bluestore_pextent_t& alloc) +{ + extents.emplace_back(alloc); + if (!is_compressed()) { + logical_length += alloc.length; + } +} + +bool bluestore_blob_t::release_extents(bool all, + const PExtentVector& logical, + PExtentVector* r) +{ + // common case: all of it? + if (all) { + uint64_t pos = 0; + for (auto& e : extents) { + if (e.is_valid()) { + r->push_back(e); + } + pos += e.length; + } + ceph_assert(is_compressed() || get_logical_length() == pos); + extents.resize(1); + extents[0].offset = bluestore_pextent_t::INVALID_OFFSET; + extents[0].length = pos; + return true; + } + // remove from pextents according to logical release list + vecbuilder vb; + auto loffs_it = logical.begin(); + auto lend = logical.end(); + uint32_t pext_loffs_start = 0; //starting loffset of the current pextent + uint32_t pext_loffs = 0; //current loffset + auto pext_it = extents.begin(); + auto pext_end = extents.end(); + while (pext_it != pext_end) { + if (loffs_it == lend || + pext_loffs_start + pext_it->length <= loffs_it->offset) { + int delta0 = pext_loffs - pext_loffs_start; + ceph_assert(delta0 >= 0); + if ((uint32_t)delta0 < pext_it->length) { + vb.add(pext_it->offset + delta0, pext_it->length - delta0); + } + pext_loffs_start += pext_it->length; + pext_loffs = pext_loffs_start; + ++pext_it; + } + else { + //assert(pext_loffs == pext_loffs_start); + int delta0 = pext_loffs - pext_loffs_start; + ceph_assert(delta0 >= 0); + + int delta = loffs_it->offset - pext_loffs; + ceph_assert(delta >= 0); + if (delta > 0) { + vb.add(pext_it->offset + delta0, delta); + pext_loffs += delta; + } + + PExtentVector::iterator last_r = r->end(); + if (r->begin() != last_r) { + --last_r; + } + uint32_t to_release = loffs_it->length; + do { + uint32_t to_release_part = + std::min(pext_it->length - delta0 - delta, to_release); + auto o = pext_it->offset + delta0 + delta; + if (last_r != r->end() && last_r->offset + last_r->length == o) { + last_r->length += to_release_part; + } + else { + last_r = r->emplace(r->end(), o, to_release_part); + } + to_release -= to_release_part; + pext_loffs += to_release_part; + if (pext_loffs == pext_loffs_start + pext_it->length) { + pext_loffs_start += pext_it->length; + pext_loffs = pext_loffs_start; + pext_it++; + delta0 = delta = 0; + } + } while (to_release > 0 && pext_it != pext_end); + vb.add_invalid(loffs_it->length - to_release); + ++loffs_it; + } + } + vb.flush(); + extents.swap(vb.v); + return false; +} + +void bluestore_blob_t::split(uint32_t blob_offset, bluestore_blob_t& rb) +{ + size_t left = blob_offset; + uint32_t llen_lb = 0; + uint32_t llen_rb = 0; + unsigned i = 0; + for (auto p = extents.begin(); p != extents.end(); ++p, ++i) { + if (p->length <= left) { + left -= p->length; + llen_lb += p->length; + continue; + } + if (left) { + if (p->is_valid()) { + rb.extents.emplace_back(bluestore_pextent_t(p->offset + left, + p->length - left)); + } + else { + rb.extents.emplace_back(bluestore_pextent_t( + bluestore_pextent_t::INVALID_OFFSET, + p->length - left)); + } + llen_rb += p->length - left; + llen_lb += left; + p->length = left; + ++i; + ++p; + } + while (p != extents.end()) { + llen_rb += p->length; + rb.extents.push_back(*p++); + } + extents.resize(i); + logical_length = llen_lb; + rb.logical_length = llen_rb; + break; + } + rb.flags = flags; + + if (has_csum()) { + rb.csum_type = csum_type; + rb.csum_chunk_order = csum_chunk_order; + size_t csum_order = get_csum_chunk_size(); + ceph_assert(blob_offset % csum_order == 0); + size_t pos = (blob_offset / csum_order) * get_csum_value_size(); + // deep copy csum data + bufferptr old; + old.swap(csum_data); + rb.csum_data = bufferptr(old.c_str() + pos, old.length() - pos); + csum_data = bufferptr(old.c_str(), pos); + } +} + +// bluestore_shared_blob_t +MEMPOOL_DEFINE_OBJECT_FACTORY(bluestore_shared_blob_t, bluestore_shared_blob_t, + bluestore_cache_other); + +void bluestore_shared_blob_t::dump(Formatter *f) const +{ + f->dump_int("sbid", sbid); + f->dump_object("ref_map", ref_map); +} + +void bluestore_shared_blob_t::generate_test_instances( + list<bluestore_shared_blob_t*>& ls) +{ + ls.push_back(new bluestore_shared_blob_t(1)); +} + +ostream& operator<<(ostream& out, const bluestore_shared_blob_t& sb) +{ + out << "(sbid 0x" << std::hex << sb.sbid << std::dec; + out << " " << sb.ref_map << ")"; + return out; +} + +// bluestore_onode_t + +void bluestore_onode_t::shard_info::dump(Formatter *f) const +{ + f->dump_unsigned("offset", offset); + f->dump_unsigned("bytes", bytes); +} + +ostream& operator<<(ostream& out, const bluestore_onode_t::shard_info& si) +{ + return out << std::hex << "0x" << si.offset << "(0x" << si.bytes << " bytes" + << std::dec << ")"; +} + +void bluestore_onode_t::dump(Formatter *f) const +{ + f->dump_unsigned("nid", nid); + f->dump_unsigned("size", size); + f->open_object_section("attrs"); + for (auto p = attrs.begin(); p != attrs.end(); ++p) { + f->open_object_section("attr"); + f->dump_string("name", p->first.c_str()); // it's not quite std::string + f->dump_unsigned("len", p->second.length()); + f->close_section(); + } + f->close_section(); + f->dump_string("flags", get_flags_string()); + f->open_array_section("extent_map_shards"); + for (auto si : extent_map_shards) { + f->dump_object("shard", si); + } + f->close_section(); + f->dump_unsigned("expected_object_size", expected_object_size); + f->dump_unsigned("expected_write_size", expected_write_size); + f->dump_unsigned("alloc_hint_flags", alloc_hint_flags); +} + +void bluestore_onode_t::generate_test_instances(list<bluestore_onode_t*>& o) +{ + o.push_back(new bluestore_onode_t()); + // FIXME +} + +// bluestore_deferred_op_t + +void bluestore_deferred_op_t::dump(Formatter *f) const +{ + f->dump_unsigned("op", (int)op); + f->dump_unsigned("data_len", data.length()); + f->open_array_section("extents"); + for (auto& e : extents) { + f->dump_object("extent", e); + } + f->close_section(); +} + +void bluestore_deferred_op_t::generate_test_instances(list<bluestore_deferred_op_t*>& o) +{ + o.push_back(new bluestore_deferred_op_t); + o.push_back(new bluestore_deferred_op_t); + o.back()->op = OP_WRITE; + o.back()->extents.push_back(bluestore_pextent_t(1, 2)); + o.back()->extents.push_back(bluestore_pextent_t(100, 5)); + o.back()->data.append("my data"); +} + +void bluestore_deferred_transaction_t::dump(Formatter *f) const +{ + f->dump_unsigned("seq", seq); + f->open_array_section("ops"); + for (list<bluestore_deferred_op_t>::const_iterator p = ops.begin(); p != ops.end(); ++p) { + f->dump_object("op", *p); + } + f->close_section(); + + f->open_array_section("released extents"); + for (interval_set<uint64_t>::const_iterator p = released.begin(); p != released.end(); ++p) { + f->open_object_section("extent"); + f->dump_unsigned("offset", p.get_start()); + f->dump_unsigned("length", p.get_len()); + f->close_section(); + } + f->close_section(); +} + +void bluestore_deferred_transaction_t::generate_test_instances(list<bluestore_deferred_transaction_t*>& o) +{ + o.push_back(new bluestore_deferred_transaction_t()); + o.push_back(new bluestore_deferred_transaction_t()); + o.back()->seq = 123; + o.back()->ops.push_back(bluestore_deferred_op_t()); + o.back()->ops.push_back(bluestore_deferred_op_t()); + o.back()->ops.back().op = bluestore_deferred_op_t::OP_WRITE; + o.back()->ops.back().extents.push_back(bluestore_pextent_t(1,7)); + o.back()->ops.back().data.append("foodata"); +} + +void bluestore_compression_header_t::dump(Formatter *f) const +{ + f->dump_unsigned("type", type); + f->dump_unsigned("length", length); + if (compressor_message) { + f->dump_int("compressor_message", *compressor_message); + } +} + +void bluestore_compression_header_t::generate_test_instances( + list<bluestore_compression_header_t*>& o) +{ + o.push_back(new bluestore_compression_header_t); + o.push_back(new bluestore_compression_header_t(1)); + o.back()->length = 1234; +} + +// adds more salt to build a hash func input +shared_blob_2hash_tracker_t::hash_input_t + shared_blob_2hash_tracker_t::build_hash_input( + uint64_t sbid, + uint64_t offset) const +{ + hash_input_t res = { + sbid, + offset >> au_void_bits, + ((sbid & 0xffffffff) << 32) + ~(uint32_t((offset >> au_void_bits) & 0xffffffff)) + }; + return res; +} + +void shared_blob_2hash_tracker_t::inc( + uint64_t sbid, + uint64_t offset, + int n) +{ + auto hash_input = build_hash_input(sbid, offset); + ref_counter_2hash_tracker_t::inc( + (char*)hash_input.data(), + get_hash_input_size(), + n); +} + +void shared_blob_2hash_tracker_t::inc_range( + uint64_t sbid, + uint64_t offset, + uint32_t len, + int n) +{ + uint32_t alloc_unit = 1 << au_void_bits; + int64_t l = len; + while (l > 0) { + // don't care about ofset alignment as inc() trims it anyway + inc(sbid, offset, n); + offset += alloc_unit; + l -= alloc_unit; + } +} + +bool shared_blob_2hash_tracker_t::test_hash_conflict( + uint64_t sbid1, + uint64_t offset1, + uint64_t sbid2, + uint64_t offset2) const +{ + auto hash_input1 = build_hash_input(sbid1, offset1); + auto hash_input2 = build_hash_input(sbid2, offset2); + return ref_counter_2hash_tracker_t::test_hash_conflict( + (char*)hash_input1.data(), + (char*)hash_input2.data(), + get_hash_input_size()); +} + +bool shared_blob_2hash_tracker_t::test_all_zero( + uint64_t sbid, + uint64_t offset) const +{ + auto hash_input = build_hash_input(sbid, offset); + return + ref_counter_2hash_tracker_t::test_all_zero( + (char*)hash_input.data(), + get_hash_input_size()); +} + +bool shared_blob_2hash_tracker_t::test_all_zero_range( + uint64_t sbid, + uint64_t offset, + uint32_t len) const +{ + uint32_t alloc_unit = 1 << au_void_bits; + int64_t l = len; + while (l > 0) { + // don't care about ofset alignment as inc() trims it anyway + if (!test_all_zero(sbid, offset)) { + return false; + } + offset += alloc_unit; + l -= alloc_unit; + } + return true; +} diff --git a/src/os/bluestore/bluestore_types.h b/src/os/bluestore/bluestore_types.h new file mode 100644 index 000000000..b21531bfe --- /dev/null +++ b/src/os/bluestore/bluestore_types.h @@ -0,0 +1,1368 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab +/* + * Ceph - scalable distributed file system + * + * Copyright (C) 2014 Red Hat + * + * This is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License version 2.1, as published by the Free Software + * Foundation. See file COPYING. + * + */ + +#ifndef CEPH_OSD_BLUESTORE_BLUESTORE_TYPES_H +#define CEPH_OSD_BLUESTORE_BLUESTORE_TYPES_H + +#include <ostream> +#include <type_traits> +#include <vector> +#include <array> +#include "include/mempool.h" +#include "include/types.h" +#include "include/interval_set.h" +#include "include/utime.h" +#include "common/hobject.h" +#include "compressor/Compressor.h" +#include "common/Checksummer.h" +#include "include/mempool.h" +#include "include/ceph_hash.h" + +namespace ceph { + class Formatter; +} + +/// label for block device +struct bluestore_bdev_label_t { + uuid_d osd_uuid; ///< osd uuid + uint64_t size = 0; ///< device size + utime_t btime; ///< birth time + std::string description; ///< device description + + std::map<std::string,std::string> meta; ///< {read,write}_meta() content from ObjectStore + + void encode(ceph::buffer::list& bl) const; + void decode(ceph::buffer::list::const_iterator& p); + void dump(ceph::Formatter *f) const; + static void generate_test_instances(std::list<bluestore_bdev_label_t*>& o); +}; +WRITE_CLASS_ENCODER(bluestore_bdev_label_t) + +std::ostream& operator<<(std::ostream& out, const bluestore_bdev_label_t& l); + +/// collection metadata +struct bluestore_cnode_t { + uint32_t bits; ///< how many bits of coll pgid are significant + + explicit bluestore_cnode_t(int b=0) : bits(b) {} + + DENC(bluestore_cnode_t, v, p) { + DENC_START(1, 1, p); + denc(v.bits, p); + DENC_FINISH(p); + } + void dump(ceph::Formatter *f) const; + static void generate_test_instances(std::list<bluestore_cnode_t*>& o); +}; +WRITE_CLASS_DENC(bluestore_cnode_t) + +std::ostream& operator<<(std::ostream& out, const bluestore_cnode_t& l); + +template <typename OFFS_TYPE, typename LEN_TYPE> +struct bluestore_interval_t +{ + static const uint64_t INVALID_OFFSET = ~0ull; + + OFFS_TYPE offset = 0; + LEN_TYPE length = 0; + + bluestore_interval_t(){} + bluestore_interval_t(uint64_t o, uint64_t l) : offset(o), length(l) {} + + bool is_valid() const { + return offset != INVALID_OFFSET; + } + uint64_t end() const { + return offset != INVALID_OFFSET ? offset + length : INVALID_OFFSET; + } + + bool operator==(const bluestore_interval_t& other) const { + return offset == other.offset && length == other.length; + } + +}; + +/// pextent: physical extent +struct bluestore_pextent_t : public bluestore_interval_t<uint64_t, uint32_t> +{ + bluestore_pextent_t() {} + bluestore_pextent_t(uint64_t o, uint64_t l) : bluestore_interval_t(o, l) {} + bluestore_pextent_t(const bluestore_interval_t &ext) : + bluestore_interval_t(ext.offset, ext.length) {} + + DENC(bluestore_pextent_t, v, p) { + denc_lba(v.offset, p); + denc_varint_lowz(v.length, p); + } + + void dump(ceph::Formatter *f) const; + static void generate_test_instances(std::list<bluestore_pextent_t*>& ls); +}; +WRITE_CLASS_DENC(bluestore_pextent_t) + +std::ostream& operator<<(std::ostream& out, const bluestore_pextent_t& o); + +typedef mempool::bluestore_cache_other::vector<bluestore_pextent_t> PExtentVector; + +template<> +struct denc_traits<PExtentVector> { + static constexpr bool supported = true; + static constexpr bool bounded = false; + static constexpr bool featured = false; + static constexpr bool need_contiguous = true; + static void bound_encode(const PExtentVector& v, size_t& p) { + p += sizeof(uint32_t); + const auto size = v.size(); + if (size) { + size_t per = 0; + denc(v.front(), per); + p += per * size; + } + } + static void encode(const PExtentVector& v, + ceph::buffer::list::contiguous_appender& p) { + denc_varint(v.size(), p); + for (auto& i : v) { + denc(i, p); + } + } + static void decode(PExtentVector& v, ceph::buffer::ptr::const_iterator& p) { + unsigned num; + denc_varint(num, p); + v.clear(); + v.resize(num); + for (unsigned i=0; i<num; ++i) { + denc(v[i], p); + } + } +}; + +/// extent_map: a std::map of reference counted extents +struct bluestore_extent_ref_map_t { + struct record_t { + uint32_t length; + uint32_t refs; + record_t(uint32_t l=0, uint32_t r=0) : length(l), refs(r) {} + DENC(bluestore_extent_ref_map_t::record_t, v, p) { + denc_varint_lowz(v.length, p); + denc_varint(v.refs, p); + } + }; + + typedef mempool::bluestore_cache_other::map<uint64_t,record_t> map_t; + map_t ref_map; + + void _check() const; + void _maybe_merge_left(map_t::iterator& p); + + void clear() { + ref_map.clear(); + } + bool empty() const { + return ref_map.empty(); + } + + void get(uint64_t offset, uint32_t len); + void put(uint64_t offset, uint32_t len, PExtentVector *release, + bool *maybe_unshared); + + bool contains(uint64_t offset, uint32_t len) const; + bool intersects(uint64_t offset, uint32_t len) const; + + void bound_encode(size_t& p) const { + denc_varint((uint32_t)0, p); + if (!ref_map.empty()) { + size_t elem_size = 0; + denc_varint_lowz((uint64_t)0, elem_size); + ref_map.begin()->second.bound_encode(elem_size); + p += elem_size * ref_map.size(); + } + } + void encode(ceph::buffer::list::contiguous_appender& p) const { + const uint32_t n = ref_map.size(); + denc_varint(n, p); + if (n) { + auto i = ref_map.begin(); + denc_varint_lowz(i->first, p); + i->second.encode(p); + int64_t pos = i->first; + while (++i != ref_map.end()) { + denc_varint_lowz((int64_t)i->first - pos, p); + i->second.encode(p); + pos = i->first; + } + } + } + void decode(ceph::buffer::ptr::const_iterator& p) { + uint32_t n; + denc_varint(n, p); + if (n) { + int64_t pos; + denc_varint_lowz(pos, p); + ref_map[pos].decode(p); + while (--n) { + int64_t delta; + denc_varint_lowz(delta, p); + pos += delta; + ref_map[pos].decode(p); + } + } + } + + void dump(ceph::Formatter *f) const; + static void generate_test_instances(std::list<bluestore_extent_ref_map_t*>& o); +}; +WRITE_CLASS_DENC(bluestore_extent_ref_map_t) + + +std::ostream& operator<<(std::ostream& out, const bluestore_extent_ref_map_t& rm); +static inline bool operator==(const bluestore_extent_ref_map_t::record_t& l, + const bluestore_extent_ref_map_t::record_t& r) { + return l.length == r.length && l.refs == r.refs; +} +static inline bool operator==(const bluestore_extent_ref_map_t& l, + const bluestore_extent_ref_map_t& r) { + return l.ref_map == r.ref_map; +} +static inline bool operator!=(const bluestore_extent_ref_map_t& l, + const bluestore_extent_ref_map_t& r) { + return !(l == r); +} + +/// blob_use_tracker: a set of per-alloc unit ref buckets to track blob usage +struct bluestore_blob_use_tracker_t { + // N.B.: There is no need to minimize au_size/num_au + // as much as possible (e.g. have just a single byte for au_size) since: + // 1) Struct isn't packed hence it's padded. And even if it's packed see 2) + // 2) Mem manager has its own granularity, most probably >= 8 bytes + // + uint32_t au_size; // Allocation (=tracking) unit size, + // == 0 if uninitialized + uint32_t num_au; // Amount of allocation units tracked + // == 0 if single unit or the whole blob is tracked + uint32_t alloc_au; // Amount of allocation units allocated + + union { + uint32_t* bytes_per_au; + uint32_t total_bytes; + }; + + bluestore_blob_use_tracker_t() + : au_size(0), num_au(0), alloc_au(0), bytes_per_au(nullptr) { + } + bluestore_blob_use_tracker_t(const bluestore_blob_use_tracker_t& tracker); + bluestore_blob_use_tracker_t& operator=(const bluestore_blob_use_tracker_t& rhs); + ~bluestore_blob_use_tracker_t() { + clear(); + } + + void clear() { + release(alloc_au, bytes_per_au); + num_au = 0; + alloc_au = 0; + bytes_per_au = 0; + au_size = 0; + } + + uint32_t get_referenced_bytes() const { + uint32_t total = 0; + if (!num_au) { + total = total_bytes; + } else { + for (size_t i = 0; i < num_au; ++i) { + total += bytes_per_au[i]; + } + } + return total; + } + bool is_not_empty() const { + if (!num_au) { + return total_bytes != 0; + } else { + for (size_t i = 0; i < num_au; ++i) { + if (bytes_per_au[i]) { + return true; + } + } + } + return false; + } + bool is_empty() const { + return !is_not_empty(); + } + void prune_tail(uint32_t new_len) { + if (num_au) { + new_len = round_up_to(new_len, au_size); + uint32_t _num_au = new_len / au_size; + ceph_assert(_num_au <= num_au); + if (_num_au) { + num_au = _num_au; // bytes_per_au array is left unmodified + } else { + clear(); + } + } + } + void add_tail(uint32_t new_len, uint32_t _au_size) { + auto full_size = au_size * (num_au ? num_au : 1); + ceph_assert(new_len >= full_size); + if (new_len == full_size) { + return; + } + if (!num_au) { + uint32_t old_total = total_bytes; + total_bytes = 0; + init(new_len, _au_size); + ceph_assert(num_au); + bytes_per_au[0] = old_total; + } else { + ceph_assert(_au_size == au_size); + new_len = round_up_to(new_len, au_size); + uint32_t _num_au = new_len / au_size; + ceph_assert(_num_au >= num_au); + if (_num_au > num_au) { + auto old_bytes = bytes_per_au; + auto old_num_au = num_au; + auto old_alloc_au = alloc_au; + alloc_au = num_au = 0; // to bypass an assertion in allocate() + bytes_per_au = nullptr; + allocate(_num_au); + for (size_t i = 0; i < old_num_au; i++) { + bytes_per_au[i] = old_bytes[i]; + } + for (size_t i = old_num_au; i < num_au; i++) { + bytes_per_au[i] = 0; + } + release(old_alloc_au, old_bytes); + } + } + } + + void init( + uint32_t full_length, + uint32_t _au_size); + + void get( + uint32_t offset, + uint32_t len); + + /// put: return true if the blob has no references any more after the call, + /// no release_units is filled for the sake of performance. + /// return false if there are some references to the blob, + /// in this case release_units contains pextents + /// (identified by their offsets relative to the blob start) + /// that are not used any more and can be safely deallocated. + bool put( + uint32_t offset, + uint32_t len, + PExtentVector *release); + + bool can_split() const; + bool can_split_at(uint32_t blob_offset) const; + void split( + uint32_t blob_offset, + bluestore_blob_use_tracker_t* r); + + bool equal( + const bluestore_blob_use_tracker_t& other) const; + + void bound_encode(size_t& p) const { + denc_varint(au_size, p); + if (au_size) { + denc_varint(num_au, p); + if (!num_au) { + denc_varint(total_bytes, p); + } else { + size_t elem_size = 0; + denc_varint((uint32_t)0, elem_size); + p += elem_size * num_au; + } + } + } + void encode(ceph::buffer::list::contiguous_appender& p) const { + denc_varint(au_size, p); + if (au_size) { + denc_varint(num_au, p); + if (!num_au) { + denc_varint(total_bytes, p); + } else { + size_t elem_size = 0; + denc_varint((uint32_t)0, elem_size); + for (size_t i = 0; i < num_au; ++i) { + denc_varint(bytes_per_au[i], p); + } + } + } + } + void decode(ceph::buffer::ptr::const_iterator& p) { + clear(); + denc_varint(au_size, p); + if (au_size) { + uint32_t _num_au; + denc_varint(_num_au, p); + if (!_num_au) { + num_au = 0; + denc_varint(total_bytes, p); + } else { + allocate(_num_au); + for (size_t i = 0; i < _num_au; ++i) { + denc_varint(bytes_per_au[i], p); + } + } + } + } + + void dump(ceph::Formatter *f) const; + static void generate_test_instances(std::list<bluestore_blob_use_tracker_t*>& o); +private: + void allocate(uint32_t _num_au); + void release(uint32_t _num_au, uint32_t* ptr); +}; +WRITE_CLASS_DENC(bluestore_blob_use_tracker_t) +std::ostream& operator<<(std::ostream& out, const bluestore_blob_use_tracker_t& rm); + +/// blob: a piece of data on disk +struct bluestore_blob_t { +private: + PExtentVector extents; ///< raw data position on device + uint32_t logical_length = 0; ///< original length of data stored in the blob + uint32_t compressed_length = 0; ///< compressed length if any + +public: + enum { + LEGACY_FLAG_MUTABLE = 1, ///< [legacy] blob can be overwritten or split + FLAG_COMPRESSED = 2, ///< blob is compressed + FLAG_CSUM = 4, ///< blob has checksums + FLAG_HAS_UNUSED = 8, ///< blob has unused std::map + FLAG_SHARED = 16, ///< blob is shared; see external SharedBlob + }; + static std::string get_flags_string(unsigned flags); + + uint32_t flags = 0; ///< FLAG_* + + typedef uint16_t unused_t; + unused_t unused = 0; ///< portion that has never been written to (bitmap) + + uint8_t csum_type = Checksummer::CSUM_NONE; ///< CSUM_* + uint8_t csum_chunk_order = 0; ///< csum block size is 1<<block_order bytes + + ceph::buffer::ptr csum_data; ///< opaque std::vector of csum data + + bluestore_blob_t(uint32_t f = 0) : flags(f) {} + + const PExtentVector& get_extents() const { + return extents; + } + PExtentVector& dirty_extents() { + return extents; + } + + DENC_HELPERS; + void bound_encode(size_t& p, uint64_t struct_v) const { + ceph_assert(struct_v == 1 || struct_v == 2); + denc(extents, p); + denc_varint(flags, p); + denc_varint_lowz(logical_length, p); + denc_varint_lowz(compressed_length, p); + denc(csum_type, p); + denc(csum_chunk_order, p); + denc_varint(csum_data.length(), p); + p += csum_data.length(); + p += sizeof(unused_t); + } + + void encode(ceph::buffer::list::contiguous_appender& p, uint64_t struct_v) const { + ceph_assert(struct_v == 1 || struct_v == 2); + denc(extents, p); + denc_varint(flags, p); + if (is_compressed()) { + denc_varint_lowz(logical_length, p); + denc_varint_lowz(compressed_length, p); + } + if (has_csum()) { + denc(csum_type, p); + denc(csum_chunk_order, p); + denc_varint(csum_data.length(), p); + memcpy(p.get_pos_add(csum_data.length()), csum_data.c_str(), + csum_data.length()); + } + if (has_unused()) { + denc(unused, p); + } + } + + void decode(ceph::buffer::ptr::const_iterator& p, uint64_t struct_v) { + ceph_assert(struct_v == 1 || struct_v == 2); + denc(extents, p); + denc_varint(flags, p); + if (is_compressed()) { + denc_varint_lowz(logical_length, p); + denc_varint_lowz(compressed_length, p); + } else { + logical_length = get_ondisk_length(); + } + if (has_csum()) { + denc(csum_type, p); + denc(csum_chunk_order, p); + int len; + denc_varint(len, p); + csum_data = p.get_ptr(len); + csum_data.reassign_to_mempool(mempool::mempool_bluestore_cache_other); + } + if (has_unused()) { + denc(unused, p); + } + } + + bool can_split() const { + return + !has_flag(FLAG_SHARED) && + !has_flag(FLAG_COMPRESSED) && + !has_flag(FLAG_HAS_UNUSED); // splitting unused set is complex + } + bool can_split_at(uint32_t blob_offset) const { + return !has_csum() || blob_offset % get_csum_chunk_size() == 0; + } + + void dump(ceph::Formatter *f) const; + static void generate_test_instances(std::list<bluestore_blob_t*>& ls); + + bool has_flag(unsigned f) const { + return flags & f; + } + void set_flag(unsigned f) { + flags |= f; + } + void clear_flag(unsigned f) { + flags &= ~f; + } + std::string get_flags_string() const { + return get_flags_string(flags); + } + + void set_compressed(uint64_t clen_orig, uint64_t clen) { + set_flag(FLAG_COMPRESSED); + logical_length = clen_orig; + compressed_length = clen; + } + bool is_mutable() const { + return !is_compressed() && !is_shared(); + } + bool is_compressed() const { + return has_flag(FLAG_COMPRESSED); + } + bool has_csum() const { + return has_flag(FLAG_CSUM); + } + bool has_unused() const { + return has_flag(FLAG_HAS_UNUSED); + } + bool is_shared() const { + return has_flag(FLAG_SHARED); + } + + /// return chunk (i.e. min readable block) size for the blob + uint64_t get_chunk_size(uint64_t dev_block_size) const { + return has_csum() ? + std::max<uint64_t>(dev_block_size, get_csum_chunk_size()) : dev_block_size; + } + uint32_t get_csum_chunk_size() const { + return 1 << csum_chunk_order; + } + uint32_t get_compressed_payload_length() const { + return is_compressed() ? compressed_length : 0; + } + uint64_t calc_offset(uint64_t x_off, uint64_t *plen) const { + auto p = extents.begin(); + ceph_assert(p != extents.end()); + while (x_off >= p->length) { + x_off -= p->length; + ++p; + ceph_assert(p != extents.end()); + } + if (plen) + *plen = p->length - x_off; + return p->offset + x_off; + } + + // validate whether or not the status of pextents within the given range + // meets the requirement(allocated or unallocated). + bool _validate_range(uint64_t b_off, uint64_t b_len, + bool require_allocated) const { + auto p = extents.begin(); + ceph_assert(p != extents.end()); + while (b_off >= p->length) { + b_off -= p->length; + if (++p == extents.end()) + return false; + } + b_len += b_off; + while (b_len) { + if (require_allocated != p->is_valid()) { + return false; + } + if (p->length >= b_len) { + return true; + } + b_len -= p->length; + if (++p == extents.end()) + return false; + } + ceph_abort_msg("we should not get here"); + return false; + } + + /// return true if the entire range is allocated + /// (mapped to extents on disk) + bool is_allocated(uint64_t b_off, uint64_t b_len) const { + return _validate_range(b_off, b_len, true); + } + + /// return true if the entire range is unallocated + /// (not mapped to extents on disk) + bool is_unallocated(uint64_t b_off, uint64_t b_len) const { + return _validate_range(b_off, b_len, false); + } + + /// return true if the logical range has never been used + bool is_unused(uint64_t offset, uint64_t length) const { + if (!has_unused()) { + return false; + } + ceph_assert(!is_compressed()); + uint64_t blob_len = get_logical_length(); + ceph_assert((blob_len % (sizeof(unused)*8)) == 0); + ceph_assert(offset + length <= blob_len); + uint64_t chunk_size = blob_len / (sizeof(unused)*8); + uint64_t start = offset / chunk_size; + uint64_t end = round_up_to(offset + length, chunk_size) / chunk_size; + auto i = start; + while (i < end && (unused & (1u << i))) { + i++; + } + return i >= end; + } + + /// mark a range that has never been used + void add_unused(uint64_t offset, uint64_t length) { + ceph_assert(!is_compressed()); + uint64_t blob_len = get_logical_length(); + ceph_assert((blob_len % (sizeof(unused)*8)) == 0); + ceph_assert(offset + length <= blob_len); + uint64_t chunk_size = blob_len / (sizeof(unused)*8); + uint64_t start = round_up_to(offset, chunk_size) / chunk_size; + uint64_t end = (offset + length) / chunk_size; + for (auto i = start; i < end; ++i) { + unused |= (1u << i); + } + if (start != end) { + set_flag(FLAG_HAS_UNUSED); + } + } + + /// indicate that a range has (now) been used. + void mark_used(uint64_t offset, uint64_t length) { + if (has_unused()) { + ceph_assert(!is_compressed()); + uint64_t blob_len = get_logical_length(); + ceph_assert((blob_len % (sizeof(unused)*8)) == 0); + ceph_assert(offset + length <= blob_len); + uint64_t chunk_size = blob_len / (sizeof(unused)*8); + uint64_t start = offset / chunk_size; + uint64_t end = round_up_to(offset + length, chunk_size) / chunk_size; + for (auto i = start; i < end; ++i) { + unused &= ~(1u << i); + } + if (unused == 0) { + clear_flag(FLAG_HAS_UNUSED); + } + } + } + + // map_f_invoke templates intended to mask parameters which are not expected + // by the provided callback + template<class F, typename std::enable_if<std::is_invocable_r_v< + int, + F, + uint64_t, + uint64_t>>::type* = nullptr> + int map_f_invoke(uint64_t lo, + const bluestore_pextent_t& p, + uint64_t o, + uint64_t l, F&& f) const{ + return f(o, l); + } + + template<class F, typename std::enable_if<std::is_invocable_r_v< + int, + F, + uint64_t, + uint64_t, + uint64_t>>::type * = nullptr> + int map_f_invoke(uint64_t lo, + const bluestore_pextent_t& p, + uint64_t o, + uint64_t l, F&& f) const { + return f(lo, o, l); + } + + template<class F, typename std::enable_if<std::is_invocable_r_v< + int, + F, + const bluestore_pextent_t&, + uint64_t, + uint64_t>>::type * = nullptr> + int map_f_invoke(uint64_t lo, + const bluestore_pextent_t& p, + uint64_t o, + uint64_t l, F&& f) const { + return f(p, o, l); + } + + template<class F> + int map(uint64_t x_off, uint64_t x_len, F&& f) const { + auto x_off0 = x_off; + auto p = extents.begin(); + ceph_assert(p != extents.end()); + while (x_off >= p->length) { + x_off -= p->length; + ++p; + ceph_assert(p != extents.end()); + } + while (x_len > 0 && p != extents.end()) { + uint64_t l = std::min(p->length - x_off, x_len); + int r = map_f_invoke(x_off0, *p, p->offset + x_off, l, f); + if (r < 0) + return r; + x_off = 0; + x_len -= l; + x_off0 += l; + ++p; + } + return 0; + } + + template<class F> + void map_bl(uint64_t x_off, + ceph::buffer::list& bl, + F&& f) const { + static_assert(std::is_invocable_v<F, uint64_t, ceph::buffer::list&>); + + auto p = extents.begin(); + ceph_assert(p != extents.end()); + while (x_off >= p->length) { + x_off -= p->length; + ++p; + ceph_assert(p != extents.end()); + } + ceph::buffer::list::iterator it = bl.begin(); + uint64_t x_len = bl.length(); + while (x_len > 0) { + ceph_assert(p != extents.end()); + uint64_t l = std::min(p->length - x_off, x_len); + ceph::buffer::list t; + it.copy(l, t); + f(p->offset + x_off, t); + x_off = 0; + x_len -= l; + ++p; + } + } + + uint32_t get_ondisk_length() const { + uint32_t len = 0; + for (auto &p : extents) { + len += p.length; + } + return len; + } + + uint32_t get_logical_length() const { + return logical_length; + } + size_t get_csum_value_size() const; + + size_t get_csum_count() const { + size_t vs = get_csum_value_size(); + if (!vs) + return 0; + return csum_data.length() / vs; + } + uint64_t get_csum_item(unsigned i) const { + size_t cs = get_csum_value_size(); + const char *p = csum_data.c_str(); + switch (cs) { + case 0: + ceph_abort_msg("no csum data, bad index"); + case 1: + return reinterpret_cast<const uint8_t*>(p)[i]; + case 2: + return reinterpret_cast<const ceph_le16*>(p)[i]; + case 4: + return reinterpret_cast<const ceph_le32*>(p)[i]; + case 8: + return reinterpret_cast<const ceph_le64*>(p)[i]; + default: + ceph_abort_msg("unrecognized csum word size"); + } + } + const char *get_csum_item_ptr(unsigned i) const { + size_t cs = get_csum_value_size(); + return csum_data.c_str() + (cs * i); + } + char *get_csum_item_ptr(unsigned i) { + size_t cs = get_csum_value_size(); + return csum_data.c_str() + (cs * i); + } + + void init_csum(unsigned type, unsigned order, unsigned len) { + flags |= FLAG_CSUM; + csum_type = type; + csum_chunk_order = order; + csum_data = ceph::buffer::create(get_csum_value_size() * len / get_csum_chunk_size()); + csum_data.zero(); + csum_data.reassign_to_mempool(mempool::mempool_bluestore_cache_other); + } + + /// calculate csum for the buffer at the given b_off + void calc_csum(uint64_t b_off, const ceph::buffer::list& bl); + + /// verify csum: return -EOPNOTSUPP for unsupported checksum type; + /// return -1 and valid(nonnegative) b_bad_off for checksum error; + /// return 0 if all is well. + int verify_csum(uint64_t b_off, const ceph::buffer::list& bl, int* b_bad_off, + uint64_t *bad_csum) const; + + bool can_prune_tail() const { + return + extents.size() > 1 && // if it's all invalid it's not pruning. + !extents.back().is_valid() && + !has_unused(); + } + void prune_tail() { + const auto &p = extents.back(); + logical_length -= p.length; + extents.pop_back(); + if (has_csum()) { + ceph::buffer::ptr t; + t.swap(csum_data); + csum_data = ceph::buffer::ptr(t.c_str(), + get_logical_length() / get_csum_chunk_size() * + get_csum_value_size()); + } + } + void add_tail(uint32_t new_len) { + ceph_assert(is_mutable()); + ceph_assert(!has_unused()); + ceph_assert(new_len > logical_length); + extents.emplace_back( + bluestore_pextent_t( + bluestore_pextent_t::INVALID_OFFSET, + new_len - logical_length)); + logical_length = new_len; + if (has_csum()) { + ceph::buffer::ptr t; + t.swap(csum_data); + csum_data = ceph::buffer::create( + get_csum_value_size() * logical_length / get_csum_chunk_size()); + csum_data.copy_in(0, t.length(), t.c_str()); + csum_data.zero(t.length(), csum_data.length() - t.length()); + } + } + uint32_t get_release_size(uint32_t min_alloc_size) const { + if (is_compressed()) { + return get_logical_length(); + } + uint32_t res = get_csum_chunk_size(); + if (!has_csum() || res < min_alloc_size) { + res = min_alloc_size; + } + return res; + } + + void split(uint32_t blob_offset, bluestore_blob_t& rb); + void allocated(uint32_t b_off, uint32_t length, const PExtentVector& allocs); + void allocated_test(const bluestore_pextent_t& alloc); // intended for UT only + + /// updates blob's pextents container and return unused pextents eligible + /// for release. + /// all - indicates that the whole blob to be released. + /// logical - specifies set of logical extents within blob's + /// to be released + /// Returns true if blob has no more valid pextents + bool release_extents( + bool all, + const PExtentVector& logical, + PExtentVector* r); +}; +WRITE_CLASS_DENC_FEATURED(bluestore_blob_t) + +std::ostream& operator<<(std::ostream& out, const bluestore_blob_t& o); + + +/// shared blob state +struct bluestore_shared_blob_t { + MEMPOOL_CLASS_HELPERS(); + uint64_t sbid; ///> shared blob id + bluestore_extent_ref_map_t ref_map; ///< shared blob extents + + bluestore_shared_blob_t(uint64_t _sbid) : sbid(_sbid) {} + bluestore_shared_blob_t(uint64_t _sbid, + bluestore_extent_ref_map_t&& _ref_map ) + : sbid(_sbid), ref_map(std::move(_ref_map)) {} + + DENC(bluestore_shared_blob_t, v, p) { + DENC_START(1, 1, p); + denc(v.ref_map, p); + DENC_FINISH(p); + } + + + void dump(ceph::Formatter *f) const; + static void generate_test_instances(std::list<bluestore_shared_blob_t*>& ls); + + bool empty() const { + return ref_map.empty(); + } +}; +WRITE_CLASS_DENC(bluestore_shared_blob_t) + +std::ostream& operator<<(std::ostream& out, const bluestore_shared_blob_t& o); + +/// onode: per-object metadata +struct bluestore_onode_t { + uint64_t nid = 0; ///< numeric id (locally unique) + uint64_t size = 0; ///< object size + // mempool to be assigned to buffer::ptr manually + std::map<mempool::bluestore_cache_meta::string, ceph::buffer::ptr> attrs; + + struct shard_info { + uint32_t offset = 0; ///< logical offset for start of shard + uint32_t bytes = 0; ///< encoded bytes + DENC(shard_info, v, p) { + denc_varint(v.offset, p); + denc_varint(v.bytes, p); + } + void dump(ceph::Formatter *f) const; + }; + std::vector<shard_info> extent_map_shards; ///< extent std::map shards (if any) + + uint32_t expected_object_size = 0; + uint32_t expected_write_size = 0; + uint32_t alloc_hint_flags = 0; + + uint8_t flags = 0; + + enum { + FLAG_OMAP = 1, ///< object may have omap data + FLAG_PGMETA_OMAP = 2, ///< omap data is in meta omap prefix + FLAG_PERPOOL_OMAP = 4, ///< omap data is in per-pool prefix; per-pool keys + FLAG_PERPG_OMAP = 8, ///< omap data is in per-pg prefix; per-pg keys + }; + + std::string get_flags_string() const { + std::string s; + if (flags & FLAG_OMAP) { + s = "omap"; + } + if (flags & FLAG_PGMETA_OMAP) { + s += "+pgmeta_omap"; + } + if (flags & FLAG_PERPOOL_OMAP) { + s += "+per_pool_omap"; + } + if (flags & FLAG_PERPG_OMAP) { + s += "+per_pg_omap"; + } + return s; + } + + bool has_flag(unsigned f) const { + return flags & f; + } + + void set_flag(unsigned f) { + flags |= f; + } + + void clear_flag(unsigned f) { + flags &= ~f; + } + + bool has_omap() const { + return has_flag(FLAG_OMAP); + } + + static bool is_pgmeta_omap(uint8_t flags) { + return flags & FLAG_PGMETA_OMAP; + } + static bool is_perpool_omap(uint8_t flags) { + return flags & FLAG_PERPOOL_OMAP; + } + static bool is_perpg_omap(uint8_t flags) { + return flags & FLAG_PERPG_OMAP; + } + bool is_pgmeta_omap() const { + return has_flag(FLAG_PGMETA_OMAP); + } + bool is_perpool_omap() const { + return has_flag(FLAG_PERPOOL_OMAP); + } + bool is_perpg_omap() const { + return has_flag(FLAG_PERPG_OMAP); + } + + void set_omap_flags(bool legacy) { + set_flag(FLAG_OMAP | (legacy ? 0 : (FLAG_PERPOOL_OMAP | FLAG_PERPG_OMAP))); + } + void set_omap_flags_pgmeta() { + set_flag(FLAG_OMAP | FLAG_PGMETA_OMAP); + } + + void clear_omap_flag() { + clear_flag(FLAG_OMAP); + } + + DENC(bluestore_onode_t, v, p) { + DENC_START(1, 1, p); + denc_varint(v.nid, p); + denc_varint(v.size, p); + denc(v.attrs, p); + denc(v.flags, p); + denc(v.extent_map_shards, p); + denc_varint(v.expected_object_size, p); + denc_varint(v.expected_write_size, p); + denc_varint(v.alloc_hint_flags, p); + DENC_FINISH(p); + } + void dump(ceph::Formatter *f) const; + static void generate_test_instances(std::list<bluestore_onode_t*>& o); +}; +WRITE_CLASS_DENC(bluestore_onode_t::shard_info) +WRITE_CLASS_DENC(bluestore_onode_t) + +std::ostream& operator<<(std::ostream& out, const bluestore_onode_t::shard_info& si); + +/// writeahead-logged op +struct bluestore_deferred_op_t { + typedef enum { + OP_WRITE = 1, + } type_t; + __u8 op = 0; + + PExtentVector extents; + ceph::buffer::list data; + + DENC(bluestore_deferred_op_t, v, p) { + DENC_START(1, 1, p); + denc(v.op, p); + denc(v.extents, p); + denc(v.data, p); + DENC_FINISH(p); + } + void dump(ceph::Formatter *f) const; + static void generate_test_instances(std::list<bluestore_deferred_op_t*>& o); +}; +WRITE_CLASS_DENC(bluestore_deferred_op_t) + + +/// writeahead-logged transaction +struct bluestore_deferred_transaction_t { + uint64_t seq = 0; + std::list<bluestore_deferred_op_t> ops; + interval_set<uint64_t> released; ///< allocations to release after tx + + bluestore_deferred_transaction_t() : seq(0) {} + + DENC(bluestore_deferred_transaction_t, v, p) { + DENC_START(1, 1, p); + denc(v.seq, p); + denc(v.ops, p); + denc(v.released, p); + DENC_FINISH(p); + } + void dump(ceph::Formatter *f) const; + static void generate_test_instances(std::list<bluestore_deferred_transaction_t*>& o); +}; +WRITE_CLASS_DENC(bluestore_deferred_transaction_t) + +struct bluestore_compression_header_t { + uint8_t type = Compressor::COMP_ALG_NONE; + uint32_t length = 0; + boost::optional<int32_t> compressor_message; + + bluestore_compression_header_t() {} + bluestore_compression_header_t(uint8_t _type) + : type(_type) {} + + DENC(bluestore_compression_header_t, v, p) { + DENC_START(2, 1, p); + denc(v.type, p); + denc(v.length, p); + if (struct_v >= 2) { + denc(v.compressor_message, p); + } + DENC_FINISH(p); + } + void dump(ceph::Formatter *f) const; + static void generate_test_instances(std::list<bluestore_compression_header_t*>& o); +}; +WRITE_CLASS_DENC(bluestore_compression_header_t) + +template <template <typename> typename V, class COUNTER_TYPE = int32_t> +class ref_counter_2hash_tracker_t { + size_t num_non_zero = 0; + size_t num_buckets = 0; + V<COUNTER_TYPE> buckets1; + V<COUNTER_TYPE> buckets2; + +public: + ref_counter_2hash_tracker_t(uint64_t mem_cap) { + num_buckets = mem_cap / sizeof(COUNTER_TYPE) / 2; + ceph_assert(num_buckets); + buckets1.resize(num_buckets); + buckets2.resize(num_buckets); + reset(); + } + + size_t get_num_buckets() const { + return num_buckets; + } + + void inc(const char* hash_val, size_t hash_val_len, int n) { + auto h = ceph_str_hash_rjenkins((const char*)hash_val, hash_val_len) % + num_buckets; + if (buckets1[h] == 0 && n) { + ++num_non_zero; + } else if (buckets1[h] == -n) { + --num_non_zero; + } + buckets1[h] += n; + h = ceph_str_hash_linux((const char*)hash_val, hash_val_len) % num_buckets; + if (buckets2[h] == 0 && n) { + ++num_non_zero; + } else if (buckets2[h] == -n) { + --num_non_zero; + } + buckets2[h] += n; + } + + bool test_hash_conflict( + const char* hash_val1, + const char* hash_val2, + size_t hash_val_len) const { + + auto h1 = ceph_str_hash_rjenkins((const char*)hash_val1, hash_val_len); + auto h2 = ceph_str_hash_rjenkins((const char*)hash_val2, hash_val_len); + auto h3 = ceph_str_hash_linux((const char*)hash_val1, hash_val_len); + auto h4 = ceph_str_hash_linux((const char*)hash_val2, hash_val_len); + return ((h1 % num_buckets) == (h2 % num_buckets)) && + ((h3 % num_buckets) == (h4 % num_buckets)); + } + + bool test_all_zero(const char* hash_val, size_t hash_val_len) const { + auto h = ceph_str_hash_rjenkins((const char*)hash_val, hash_val_len); + if (buckets1[h % num_buckets] != 0) { + return false; + } + h = ceph_str_hash_linux((const char*)hash_val, hash_val_len); + return buckets2[h % num_buckets] == 0; + } + + // returns number of mismatching buckets + size_t count_non_zero() const { + return num_non_zero; + } + void reset() { + for (size_t i = 0; i < num_buckets; i++) { + buckets1[i] = 0; + buckets2[i] = 0; + } + num_non_zero = 0; + } +}; + +class shared_blob_2hash_tracker_t + : public ref_counter_2hash_tracker_t<mempool::bluestore_fsck::vector> { + + static const size_t hash_input_len = 3; + + typedef std::array<uint64_t, hash_input_len> hash_input_t; + + static size_t get_hash_input_size() { + return hash_input_len * sizeof(hash_input_t::value_type); + } + + inline hash_input_t build_hash_input(uint64_t sbid, uint64_t offset) const; + + size_t au_void_bits = 0; + + +public: + shared_blob_2hash_tracker_t(uint64_t mem_cap, size_t alloc_unit) + : ref_counter_2hash_tracker_t(mem_cap) { + ceph_assert(alloc_unit); + ceph_assert(isp2(alloc_unit)); + au_void_bits = ctz(alloc_unit); + } + void inc(uint64_t sbid, uint64_t offset, int n); + void inc_range(uint64_t sbid, uint64_t offset, uint32_t len, int n); + + bool test_hash_conflict( + uint64_t sbid, + uint64_t offset, + uint64_t sbid2, + uint64_t offset2) const; + bool test_all_zero( + uint64_t sbid, + uint64_t offset) const; + bool test_all_zero_range( + uint64_t sbid, + uint64_t offset, + uint32_t len) const; +}; + +class sb_info_t { + // subzero value indicates (potentially) stray blob, + // i.e. blob that has got no real references from onodes + int64_t sbid = 0; + +public: + enum { + INVALID_POOL_ID = INT64_MIN + }; + + int64_t pool_id = INVALID_POOL_ID; + // subzero value indicates compressed_allocated as well + int32_t allocated_chunks = 0; + + sb_info_t(int64_t _sbid = 0) : sbid(_sbid) + { + } + bool operator< (const sb_info_t& other) const { + return std::abs(sbid) < std::abs(other.sbid); + } + bool operator< (const uint64_t& other_sbid) const { + return uint64_t(std::abs(sbid)) < other_sbid; + } + bool is_stray() const { + return sbid < 0; + } + uint64_t get_sbid() const { + return uint64_t(std::abs(sbid)); + } + void adopt() { + sbid = std::abs(sbid); + } +} __attribute__((packed)); + +// Space-efficient container to keep a set of sb_info structures +// given that the majority of entries are appended in a proper id-sorted +// order. Hence one can keep them in a regular vector and apply binary search +// whenever specific entry to be found. +// For the rare occasions when out-of-order append takes place - an auxilliary +// regular map is used. +struct sb_info_space_efficient_map_t { + // large array sorted by the user + mempool::bluestore_fsck::vector<sb_info_t> items; + // small additional set of items we maintain sorting ourselves + // this would never keep an entry with id > items.back().id + mempool::bluestore_fsck::vector<sb_info_t> aux_items; + + sb_info_t& add_maybe_stray(uint64_t sbid) { + return _add(-int64_t(sbid)); + } + sb_info_t& add_or_adopt(uint64_t sbid) { + auto& r = _add(sbid); + r.adopt(); + return r; + } + auto find(uint64_t id) { + if (items.size() != 0) { + auto it = std::lower_bound( + items.begin(), + items.end() - 1, + id, + [](const sb_info_t& a, const uint64_t& b) { + return a < b; + }); + if (it->get_sbid() == id) { + return it; + } + if (aux_items.size() != 0) { + auto it = std::lower_bound( + aux_items.begin(), + aux_items.end(), + id, + [](const sb_info_t& a, const uint64_t& b) { + return a < b; + }); + if (it->get_sbid() == id) { + return it; + } + } + } + return items.end(); + } + // enumerates strays, order isn't guaranteed. + void foreach_stray(std::function<void(const sb_info_t&)> cb) { + for (auto& sbi : items) { + if (sbi.is_stray()) { + cb(sbi); + } + } + for (auto& sbi : aux_items) { + if (sbi.is_stray()) { + cb(sbi); + } + } + } + auto end() { + return items.end(); + } + + void shrink() { + items.shrink_to_fit(); + aux_items.shrink_to_fit(); + } + void clear() { + items.clear(); + aux_items.clear(); + shrink(); + } +private: + sb_info_t& _add(int64_t id) { + uint64_t n_id = uint64_t(std::abs(id)); + if (items.size() == 0 || n_id > items.back().get_sbid()) { + return items.emplace_back(id); + } + auto it = find(n_id); + if (it != items.end()) { + return *it; + } + if (aux_items.size() == 0 || n_id > aux_items.back().get_sbid()) { + return aux_items.emplace_back(id); + } + // do sorted insertion, may be expensive! + it = std::upper_bound( + aux_items.begin(), + aux_items.end(), + n_id, + [](const uint64_t& a, const sb_info_t& b) { + return a < b.get_sbid(); + }); + return *aux_items.emplace(it, id); + } +}; + +#endif diff --git a/src/os/bluestore/fastbmap_allocator_impl.cc b/src/os/bluestore/fastbmap_allocator_impl.cc new file mode 100644 index 000000000..595b12485 --- /dev/null +++ b/src/os/bluestore/fastbmap_allocator_impl.cc @@ -0,0 +1,717 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab +/* + * Bitmap based in-memory allocator implementation. + * Author: Igor Fedotov, ifedotov@suse.com + * + */ + +#include "fastbmap_allocator_impl.h" + +uint64_t AllocatorLevel::l0_dives = 0; +uint64_t AllocatorLevel::l0_iterations = 0; +uint64_t AllocatorLevel::l0_inner_iterations = 0; +uint64_t AllocatorLevel::alloc_fragments = 0; +uint64_t AllocatorLevel::alloc_fragments_fast = 0; +uint64_t AllocatorLevel::l2_allocs = 0; + +inline interval_t _align2units(uint64_t offset, uint64_t len, uint64_t min_length) +{ + interval_t res; + if (len >= min_length) { + res.offset = p2roundup(offset, min_length); + auto delta_off = res.offset - offset; + if (len > delta_off) { + res.length = len - delta_off; + res.length = p2align<uint64_t>(res.length, min_length); + if (res.length) { + return res; + } + } + } + return interval_t(); +} + +interval_t AllocatorLevel01Loose::_get_longest_from_l0(uint64_t pos0, + uint64_t pos1, uint64_t min_length, interval_t* tail) const +{ + interval_t res; + if (pos0 >= pos1) { + return res; + } + auto pos = pos0; + + interval_t res_candidate; + if (tail->length != 0) { + ceph_assert((tail->offset % l0_granularity) == 0); + ceph_assert((tail->length % l0_granularity) == 0); + res_candidate.offset = tail->offset / l0_granularity; + res_candidate.length = tail->length / l0_granularity; + } + *tail = interval_t(); + + auto d = bits_per_slot; + slot_t bits = l0[pos / d]; + bits >>= pos % d; + bool end_loop = false; + auto min_granules = min_length / l0_granularity; + + do { + if ((pos % d) == 0) { + bits = l0[pos / d]; + if (pos1 - pos >= d) { + switch(bits) { + case all_slot_set: + // slot is totally free + if (!res_candidate.length) { + res_candidate.offset = pos; + } + res_candidate.length += d; + pos += d; + end_loop = pos >= pos1; + if (end_loop) { + *tail = res_candidate; + res_candidate = _align2units(res_candidate.offset, + res_candidate.length, min_granules); + if(res.length < res_candidate.length) { + res = res_candidate; + } + } + continue; + case all_slot_clear: + // slot is totally allocated + res_candidate = _align2units(res_candidate.offset, + res_candidate.length, min_granules); + if (res.length < res_candidate.length) { + res = res_candidate; + } + res_candidate = interval_t(); + pos += d; + end_loop = pos >= pos1; + continue; + } + } + } //if ((pos % d) == 0) + + end_loop = ++pos >= pos1; + if (bits & 1) { + // item is free + if (!res_candidate.length) { + res_candidate.offset = pos - 1; + } + ++res_candidate.length; + if (end_loop) { + *tail = res_candidate; + res_candidate = _align2units(res_candidate.offset, + res_candidate.length, min_granules); + if (res.length < res_candidate.length) { + res = res_candidate; + } + } + } else { + res_candidate = _align2units(res_candidate.offset, + res_candidate.length, min_granules); + if (res.length < res_candidate.length) { + res = res_candidate; + } + res_candidate = interval_t(); + } + bits >>= 1; + } while (!end_loop); + res.offset *= l0_granularity; + res.length *= l0_granularity; + tail->offset *= l0_granularity; + tail->length *= l0_granularity; + return res; +} + +void AllocatorLevel01Loose::_analyze_partials(uint64_t pos_start, + uint64_t pos_end, uint64_t length, uint64_t min_length, int mode, + search_ctx_t* ctx) +{ + auto d = L1_ENTRIES_PER_SLOT; + ceph_assert((pos_start % d) == 0); + ceph_assert((pos_end % d) == 0); + + uint64_t l0_w = slots_per_slotset * L0_ENTRIES_PER_SLOT; + + uint64_t l1_pos = pos_start; + const interval_t empty_tail; + interval_t prev_tail; + + uint64_t next_free_l1_pos = 0; + for (auto pos = pos_start / d; pos < pos_end / d; ++pos) { + slot_t slot_val = l1[pos]; + // FIXME minor: code below can be optimized to check slot_val against + // all_slot_set(_clear) value + + for (auto c = 0; c < d; c++) { + switch (slot_val & L1_ENTRY_MASK) { + case L1_ENTRY_FREE: + prev_tail = empty_tail; + if (!ctx->free_count) { + ctx->free_l1_pos = l1_pos; + } else if (l1_pos != next_free_l1_pos){ + auto o = ctx->free_l1_pos * l1_granularity; + auto l = ctx->free_count * l1_granularity; + // check if already found extent fits min_length after alignment + if (_align2units(o, l, min_length).length >= min_length) { + break; + } + // if not - proceed with the next one + ctx->free_l1_pos = l1_pos; + ctx->free_count = 0; + } + next_free_l1_pos = l1_pos + 1; + ++ctx->free_count; + if (mode == STOP_ON_EMPTY) { + return; + } + break; + case L1_ENTRY_FULL: + prev_tail = empty_tail; + break; + case L1_ENTRY_PARTIAL: + interval_t longest; + ++ctx->partial_count; + + longest = _get_longest_from_l0(l1_pos * l0_w, (l1_pos + 1) * l0_w, min_length, &prev_tail); + + if (longest.length >= length) { + if ((ctx->affordable_len == 0) || + ((ctx->affordable_len != 0) && + (longest.length < ctx->affordable_len))) { + ctx->affordable_len = longest.length; + ctx->affordable_offs = longest.offset; + } + } + if (longest.length >= min_length && + (ctx->min_affordable_len == 0 || + (longest.length < ctx->min_affordable_len))) { + + ctx->min_affordable_len = p2align<uint64_t>(longest.length, min_length); + ctx->min_affordable_offs = longest.offset; + } + if (mode == STOP_ON_PARTIAL) { + return; + } + break; + } + slot_val >>= L1_ENTRY_WIDTH; + ++l1_pos; + } + } + ctx->fully_processed = true; +} + +void AllocatorLevel01Loose::_mark_l1_on_l0(int64_t l0_pos, int64_t l0_pos_end) +{ + if (l0_pos == l0_pos_end) { + return; + } + auto d0 = bits_per_slotset; + uint64_t l1_w = L1_ENTRIES_PER_SLOT; + // this should be aligned with slotset boundaries + ceph_assert(0 == (l0_pos % d0)); + ceph_assert(0 == (l0_pos_end % d0)); + + int64_t idx = l0_pos / bits_per_slot; + int64_t idx_end = l0_pos_end / bits_per_slot; + slot_t mask_to_apply = L1_ENTRY_NOT_USED; + + auto l1_pos = l0_pos / d0; + + while (idx < idx_end) { + if (l0[idx] == all_slot_clear) { + // if not all prev slots are allocated then no need to check the + // current slot set, it's partial + ++idx; + if (mask_to_apply == L1_ENTRY_NOT_USED) { + mask_to_apply = L1_ENTRY_FULL; + } else if (mask_to_apply != L1_ENTRY_FULL) { + idx = p2roundup(idx, int64_t(slots_per_slotset)); + mask_to_apply = L1_ENTRY_PARTIAL; + } + } else if (l0[idx] == all_slot_set) { + // if not all prev slots are free then no need to check the + // current slot set, it's partial + ++idx; + if (mask_to_apply == L1_ENTRY_NOT_USED) { + mask_to_apply = L1_ENTRY_FREE; + } else if (mask_to_apply != L1_ENTRY_FREE) { + idx = p2roundup(idx, int64_t(slots_per_slotset)); + mask_to_apply = L1_ENTRY_PARTIAL; + } + } else { + // no need to check the current slot set, it's partial + mask_to_apply = L1_ENTRY_PARTIAL; + ++idx; + idx = p2roundup(idx, int64_t(slots_per_slotset)); + } + if ((idx % slots_per_slotset) == 0) { + ceph_assert(mask_to_apply != L1_ENTRY_NOT_USED); + uint64_t shift = (l1_pos % l1_w) * L1_ENTRY_WIDTH; + slot_t& slot_val = l1[l1_pos / l1_w]; + auto mask = slot_t(L1_ENTRY_MASK) << shift; + + slot_t old_mask = (slot_val & mask) >> shift; + switch(old_mask) { + case L1_ENTRY_FREE: + unalloc_l1_count--; + break; + case L1_ENTRY_PARTIAL: + partial_l1_count--; + break; + } + slot_val &= ~mask; + slot_val |= slot_t(mask_to_apply) << shift; + switch(mask_to_apply) { + case L1_ENTRY_FREE: + unalloc_l1_count++; + break; + case L1_ENTRY_PARTIAL: + partial_l1_count++; + break; + } + mask_to_apply = L1_ENTRY_NOT_USED; + ++l1_pos; + } + } +} + +void AllocatorLevel01Loose::_mark_alloc_l0(int64_t l0_pos_start, + int64_t l0_pos_end) +{ + auto d0 = L0_ENTRIES_PER_SLOT; + + int64_t pos = l0_pos_start; + slot_t bits = (slot_t)1 << (l0_pos_start % d0); + slot_t* val_s = l0.data() + (pos / d0); + int64_t pos_e = std::min(l0_pos_end, p2roundup<int64_t>(l0_pos_start + 1, d0)); + while (pos < pos_e) { + (*val_s) &= ~bits; + bits <<= 1; + pos++; + } + pos_e = std::min(l0_pos_end, p2align<int64_t>(l0_pos_end, d0)); + while (pos < pos_e) { + *(++val_s) = all_slot_clear; + pos += d0; + } + bits = 1; + ++val_s; + while (pos < l0_pos_end) { + (*val_s) &= ~bits; + bits <<= 1; + pos++; + } +} + +interval_t AllocatorLevel01Loose::_allocate_l1_contiguous(uint64_t length, + uint64_t min_length, uint64_t max_length, + uint64_t pos_start, uint64_t pos_end) +{ + interval_t res = { 0, 0 }; + uint64_t l0_w = slots_per_slotset * L0_ENTRIES_PER_SLOT; + + if (unlikely(length <= l0_granularity)) { + search_ctx_t ctx; + _analyze_partials(pos_start, pos_end, l0_granularity, l0_granularity, + STOP_ON_PARTIAL, &ctx); + + // check partially free slot sets first (including neighboring), + // full length match required. + if (ctx.affordable_len) { + // allocate as specified + ceph_assert(ctx.affordable_len >= length); + auto pos = ctx.affordable_offs / l0_granularity; + _mark_alloc_l1_l0(pos, pos + 1); + res = interval_t(ctx.affordable_offs, length); + return res; + } + + // allocate from free slot sets + if (ctx.free_count) { + auto l = std::min(length, ctx.free_count * l1_granularity); + ceph_assert((l % l0_granularity) == 0); + auto pos_end = ctx.free_l1_pos * l0_w + l / l0_granularity; + + _mark_alloc_l1_l0(ctx.free_l1_pos * l0_w, pos_end); + res = interval_t(ctx.free_l1_pos * l1_granularity, l); + return res; + } + } else if (unlikely(length == l1_granularity)) { + search_ctx_t ctx; + _analyze_partials(pos_start, pos_end, length, min_length, STOP_ON_EMPTY, &ctx); + + // allocate using contiguous extent found at l1 if any + if (ctx.free_count) { + + auto l = std::min(length, ctx.free_count * l1_granularity); + ceph_assert((l % l0_granularity) == 0); + auto pos_end = ctx.free_l1_pos * l0_w + l / l0_granularity; + + _mark_alloc_l1_l0(ctx.free_l1_pos * l0_w, pos_end); + res = interval_t(ctx.free_l1_pos * l1_granularity, l); + + return res; + } + + // we can terminate earlier on free entry only + ceph_assert(ctx.fully_processed); + + // check partially free slot sets first (including neighboring), + // full length match required. + if (ctx.affordable_len) { + ceph_assert(ctx.affordable_len >= length); + ceph_assert((length % l0_granularity) == 0); + auto pos_start = ctx.affordable_offs / l0_granularity; + auto pos_end = (ctx.affordable_offs + length) / l0_granularity; + _mark_alloc_l1_l0(pos_start, pos_end); + res = interval_t(ctx.affordable_offs, length); + return res; + } + if (ctx.min_affordable_len) { + auto pos_start = ctx.min_affordable_offs / l0_granularity; + auto pos_end = (ctx.min_affordable_offs + ctx.min_affordable_len) / l0_granularity; + _mark_alloc_l1_l0(pos_start, pos_end); + return interval_t(ctx.min_affordable_offs, ctx.min_affordable_len); + } + } else { + search_ctx_t ctx; + _analyze_partials(pos_start, pos_end, length, min_length, NO_STOP, &ctx); + ceph_assert(ctx.fully_processed); + // check partially free slot sets first (including neighboring), + // full length match required. + if (ctx.affordable_len) { + ceph_assert(ctx.affordable_len >= length); + ceph_assert((length % l0_granularity) == 0); + auto pos_start = ctx.affordable_offs / l0_granularity; + auto pos_end = (ctx.affordable_offs + length) / l0_granularity; + _mark_alloc_l1_l0(pos_start, pos_end); + res = interval_t(ctx.affordable_offs, length); + return res; + } + // allocate using contiguous extent found at l1 if affordable + // align allocated extent with min_length + if (ctx.free_count) { + auto o = ctx.free_l1_pos * l1_granularity; + auto l = ctx.free_count * l1_granularity; + interval_t aligned_extent = _align2units(o, l, min_length); + if (aligned_extent.length > 0) { + aligned_extent.length = std::min(length, + uint64_t(aligned_extent.length)); + ceph_assert((aligned_extent.offset % l0_granularity) == 0); + ceph_assert((aligned_extent.length % l0_granularity) == 0); + + auto pos_start = aligned_extent.offset / l0_granularity; + auto pos_end = (aligned_extent.offset + aligned_extent.length) / l0_granularity; + + _mark_alloc_l1_l0(pos_start, pos_end); + return aligned_extent; + } + } + if (ctx.min_affordable_len) { + auto pos_start = ctx.min_affordable_offs / l0_granularity; + auto pos_end = (ctx.min_affordable_offs + ctx.min_affordable_len) / l0_granularity; + _mark_alloc_l1_l0(pos_start, pos_end); + return interval_t(ctx.min_affordable_offs, ctx.min_affordable_len); + } + } + return res; +} + +bool AllocatorLevel01Loose::_allocate_l1(uint64_t length, + uint64_t min_length, uint64_t max_length, + uint64_t l1_pos_start, uint64_t l1_pos_end, + uint64_t* allocated, + interval_vector_t* res) +{ + uint64_t d0 = L0_ENTRIES_PER_SLOT; + uint64_t d1 = L1_ENTRIES_PER_SLOT; + + ceph_assert(0 == (l1_pos_start % (slots_per_slotset * d1))); + ceph_assert(0 == (l1_pos_end % (slots_per_slotset * d1))); + if (min_length != l0_granularity) { + // probably not the most effecient way but + // don't care much about that at the moment + bool has_space = true; + while (length > *allocated && has_space) { + interval_t i = + _allocate_l1_contiguous(length - *allocated, min_length, max_length, + l1_pos_start, l1_pos_end); + if (i.length == 0) { + has_space = false; + } else { + _fragment_and_emplace(max_length, i.offset, i.length, res); + *allocated += i.length; + } + } + } else { + uint64_t l0_w = slots_per_slotset * d0; + + for (auto idx = l1_pos_start / d1; + idx < l1_pos_end / d1 && length > *allocated; + ++idx) { + slot_t& slot_val = l1[idx]; + if (slot_val == all_slot_clear) { + continue; + } else if (slot_val == all_slot_set) { + uint64_t to_alloc = std::min(length - *allocated, + l1_granularity * d1); + *allocated += to_alloc; + ++alloc_fragments_fast; + _fragment_and_emplace(max_length, idx * d1 * l1_granularity, to_alloc, + res); + _mark_alloc_l1_l0(idx * d1 * bits_per_slotset, + idx * d1 * bits_per_slotset + to_alloc / l0_granularity); + continue; + } + auto free_pos = find_next_set_bit(slot_val, 0); + ceph_assert(free_pos < bits_per_slot); + do { + ceph_assert(length > *allocated); + + bool empty; + empty = _allocate_l0(length, max_length, + (idx * d1 + free_pos / L1_ENTRY_WIDTH) * l0_w, + (idx * d1 + free_pos / L1_ENTRY_WIDTH + 1) * l0_w, + allocated, + res); + + auto mask = slot_t(L1_ENTRY_MASK) << free_pos; + + slot_t old_mask = (slot_val & mask) >> free_pos; + switch(old_mask) { + case L1_ENTRY_FREE: + unalloc_l1_count--; + break; + case L1_ENTRY_PARTIAL: + partial_l1_count--; + break; + } + slot_val &= ~mask; + if (empty) { + // the next line is no op with the current L1_ENTRY_FULL but left + // as-is for the sake of uniformity and to avoid potential errors + // in future + slot_val |= slot_t(L1_ENTRY_FULL) << free_pos; + } else { + slot_val |= slot_t(L1_ENTRY_PARTIAL) << free_pos; + partial_l1_count++; + } + if (length <= *allocated || slot_val == all_slot_clear) { + break; + } + free_pos = find_next_set_bit(slot_val, free_pos + L1_ENTRY_WIDTH); + } while (free_pos < bits_per_slot); + } + } + return _is_empty_l1(l1_pos_start, l1_pos_end); +} + +void AllocatorLevel01Loose::collect_stats( + std::map<size_t, size_t>& bins_overall) +{ + size_t free_seq_cnt = 0; + for (auto slot : l0) { + if (slot == all_slot_set) { + free_seq_cnt += L0_ENTRIES_PER_SLOT; + } else if(slot != all_slot_clear) { + size_t pos = 0; + do { + auto pos1 = find_next_set_bit(slot, pos); + if (pos1 == pos) { + free_seq_cnt++; + pos = pos1 + 1; + } else { + if (free_seq_cnt) { + bins_overall[cbits(free_seq_cnt) - 1]++; + free_seq_cnt = 0; + } + if (pos1 < bits_per_slot) { + free_seq_cnt = 1; + } + pos = pos1 + 1; + } + } while (pos < bits_per_slot); + } else if (free_seq_cnt) { + bins_overall[cbits(free_seq_cnt) - 1]++; + free_seq_cnt = 0; + } + } + if (free_seq_cnt) { + bins_overall[cbits(free_seq_cnt) - 1]++; + } +} + +inline ssize_t AllocatorLevel01Loose::count_0s(slot_t slot_val, size_t start_pos) + { + #ifdef __GNUC__ + size_t pos = __builtin_ffsll(slot_val >> start_pos); + if (pos == 0) + return sizeof(slot_t)*8 - start_pos; + return pos - 1; + #else + size_t pos = start_pos; + slot_t mask = slot_t(1) << pos; + while (pos < bits_per_slot && (slot_val & mask) == 0) { + mask <<= 1; + pos++; + } + return pos - start_pos; + #endif + } + + inline ssize_t AllocatorLevel01Loose::count_1s(slot_t slot_val, size_t start_pos) + { + return count_0s(~slot_val, start_pos); + } +void AllocatorLevel01Loose::foreach_internal( + std::function<void(uint64_t offset, uint64_t length)> notify) +{ + size_t len = 0; + size_t off = 0; + for (size_t i = 0; i < l1.size(); i++) + { + for (size_t j = 0; j < L1_ENTRIES_PER_SLOT * L1_ENTRY_WIDTH; j += L1_ENTRY_WIDTH) + { + size_t w = (l1[i] >> j) & L1_ENTRY_MASK; + switch (w) { + case L1_ENTRY_FULL: + if (len > 0) { + notify(off, len); + len = 0; + } + break; + case L1_ENTRY_FREE: + if (len == 0) + off = ( ( bits_per_slot * i + j ) / L1_ENTRY_WIDTH ) * slots_per_slotset * bits_per_slot; + len += bits_per_slotset; + break; + case L1_ENTRY_PARTIAL: + size_t pos = ( ( bits_per_slot * i + j ) / L1_ENTRY_WIDTH ) * slots_per_slotset; + for (size_t t = 0; t < slots_per_slotset; t++) { + size_t p = 0; + slot_t allocation_pattern = l0[pos + t]; + while (p < bits_per_slot) { + if (len == 0) { + //continue to skip allocated space, meaning bits set to 0 + ssize_t alloc_count = count_0s(allocation_pattern, p); + p += alloc_count; + //now we are switched to expecting free space + if (p < bits_per_slot) { + //now @p are 1s + ssize_t free_count = count_1s(allocation_pattern, p); + assert(free_count > 0); + len = free_count; + off = (pos + t) * bits_per_slot + p; + p += free_count; + } + } else { + //continue free region + ssize_t free_count = count_1s(allocation_pattern, p); + if (free_count == 0) { + notify(off, len); + len = 0; + } else { + p += free_count; + len += free_count; + } + } + } + } + break; + } + } + } + if (len > 0) + notify(off, len); +} + +uint64_t AllocatorLevel01Loose::_claim_free_to_left_l0(int64_t l0_pos_start) +{ + int64_t d0 = L0_ENTRIES_PER_SLOT; + + int64_t pos = l0_pos_start - 1; + slot_t bits = (slot_t)1 << (pos % d0); + int64_t idx = pos / d0; + slot_t* val_s = l0.data() + idx; + + int64_t pos_e = p2align<int64_t>(pos, d0); + + while (pos >= pos_e) { + if (0 == ((*val_s) & bits)) + return pos + 1; + (*val_s) &= ~bits; + bits >>= 1; + --pos; + } + --idx; + val_s = l0.data() + idx; + while (idx >= 0 && (*val_s) == all_slot_set) { + *val_s = all_slot_clear; + --idx; + pos -= d0; + val_s = l0.data() + idx; + } + + if (idx >= 0 && + (*val_s) != all_slot_set && (*val_s) != all_slot_clear) { + int64_t pos_e = p2align<int64_t>(pos, d0); + slot_t bits = (slot_t)1 << (pos % d0); + while (pos >= pos_e) { + if (0 == ((*val_s) & bits)) + return pos + 1; + (*val_s) &= ~bits; + bits >>= 1; + --pos; + } + } + return pos + 1; +} + +uint64_t AllocatorLevel01Loose::_claim_free_to_right_l0(int64_t l0_pos_start) +{ + auto d0 = L0_ENTRIES_PER_SLOT; + + int64_t pos = l0_pos_start; + slot_t bits = (slot_t)1 << (pos % d0); + size_t idx = pos / d0; + if (idx >= l0.size()) { + return pos; + } + slot_t* val_s = l0.data() + idx; + + int64_t pos_e = p2roundup<int64_t>(pos + 1, d0); + + while (pos < pos_e) { + if (0 == ((*val_s) & bits)) + return pos; + (*val_s) &= ~bits; + bits <<= 1; + ++pos; + } + ++idx; + val_s = l0.data() + idx; + while (idx < l0.size() && (*val_s) == all_slot_set) { + *val_s = all_slot_clear; + ++idx; + pos += d0; + val_s = l0.data() + idx; + } + + if (idx < l0.size() && + (*val_s) != all_slot_set && (*val_s) != all_slot_clear) { + int64_t pos_e = p2roundup<int64_t>(pos + 1, d0); + slot_t bits = (slot_t)1 << (pos % d0); + while (pos < pos_e) { + if (0 == ((*val_s) & bits)) + return pos; + (*val_s) &= ~bits; + bits <<= 1; + ++pos; + } + } + return pos; +} diff --git a/src/os/bluestore/fastbmap_allocator_impl.h b/src/os/bluestore/fastbmap_allocator_impl.h new file mode 100644 index 000000000..e44fc76d7 --- /dev/null +++ b/src/os/bluestore/fastbmap_allocator_impl.h @@ -0,0 +1,845 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab +/* + * Bitmap based in-memory allocator implementation. + * Author: Igor Fedotov, ifedotov@suse.com + * + */ + +#ifndef __FAST_BITMAP_ALLOCATOR_IMPL_H +#define __FAST_BITMAP_ALLOCATOR_IMPL_H +#include "include/intarith.h" + +#include <vector> +#include <algorithm> +#include <mutex> + +typedef uint64_t slot_t; + +#ifdef NON_CEPH_BUILD +#include <assert.h> +struct interval_t +{ + uint64_t offset = 0; + uint64_t length = 0; + + interval_t() {} + interval_t(uint64_t o, uint64_t l) : offset(o), length(l) {} + interval_t(const interval_t &ext) : + offset(ext.offset), length(ext.length) {} +}; +typedef std::vector<interval_t> interval_vector_t; +typedef std::vector<slot_t> slot_vector_t; +#else +#include "include/ceph_assert.h" +#include "common/likely.h" +#include "os/bluestore/bluestore_types.h" +#include "include/mempool.h" +#include "common/ceph_mutex.h" + +typedef bluestore_interval_t<uint64_t, uint64_t> interval_t; +typedef PExtentVector interval_vector_t; + +typedef mempool::bluestore_alloc::vector<slot_t> slot_vector_t; + +#endif + +// fitting into cache line on x86_64 +static const size_t slots_per_slotset = 8; // 8 slots per set +static const size_t slotset_bytes = sizeof(slot_t) * slots_per_slotset; +static const size_t bits_per_slot = sizeof(slot_t) * 8; +static const size_t bits_per_slotset = slotset_bytes * 8; +static const slot_t all_slot_set = 0xffffffffffffffff; +static const slot_t all_slot_clear = 0; + +inline size_t find_next_set_bit(slot_t slot_val, size_t start_pos) +{ +#ifdef __GNUC__ + if (start_pos == 0) { + start_pos = __builtin_ffsll(slot_val); + return start_pos ? start_pos - 1 : bits_per_slot; + } +#endif + slot_t mask = slot_t(1) << start_pos; + while (start_pos < bits_per_slot && !(slot_val & mask)) { + mask <<= 1; + ++start_pos; + } + return start_pos; +} + + +class AllocatorLevel +{ +protected: + + virtual uint64_t _children_per_slot() const = 0; + virtual uint64_t _level_granularity() const = 0; + +public: + static uint64_t l0_dives; + static uint64_t l0_iterations; + static uint64_t l0_inner_iterations; + static uint64_t alloc_fragments; + static uint64_t alloc_fragments_fast; + static uint64_t l2_allocs; + + virtual ~AllocatorLevel() + {} + + virtual void collect_stats( + std::map<size_t, size_t>& bins_overall) = 0; + +}; + +class AllocatorLevel01 : public AllocatorLevel +{ +protected: + slot_vector_t l0; // set bit means free entry + slot_vector_t l1; + uint64_t l0_granularity = 0; // space per entry + uint64_t l1_granularity = 0; // space per entry + + size_t partial_l1_count = 0; + size_t unalloc_l1_count = 0; + + double get_fragmentation() const { + double res = 0.0; + auto total = unalloc_l1_count + partial_l1_count; + if (total) { + res = double(partial_l1_count) / double(total); + } + return res; + } + + uint64_t _level_granularity() const override + { + return l1_granularity; + } + + inline bool _is_slot_fully_allocated(uint64_t idx) const { + return l1[idx] == all_slot_clear; + } +public: + inline uint64_t get_min_alloc_size() const + { + return l0_granularity; + } + +}; + +template <class T> +class AllocatorLevel02; + +class AllocatorLevel01Loose : public AllocatorLevel01 +{ + enum { + L1_ENTRY_WIDTH = 2, + L1_ENTRY_MASK = (1 << L1_ENTRY_WIDTH) - 1, + L1_ENTRY_FULL = 0x00, + L1_ENTRY_PARTIAL = 0x01, + L1_ENTRY_NOT_USED = 0x02, + L1_ENTRY_FREE = 0x03, + L1_ENTRIES_PER_SLOT = bits_per_slot / L1_ENTRY_WIDTH, //32 + L0_ENTRIES_PER_SLOT = bits_per_slot, // 64 + }; + uint64_t _children_per_slot() const override + { + return L1_ENTRIES_PER_SLOT; + } + + interval_t _get_longest_from_l0(uint64_t pos0, uint64_t pos1, + uint64_t min_length, interval_t* tail) const; + + inline void _fragment_and_emplace(uint64_t max_length, uint64_t offset, + uint64_t len, + interval_vector_t* res) + { + auto it = res->rbegin(); + if (max_length) { + if (it != res->rend() && it->offset + it->length == offset) { + auto l = max_length - it->length; + if (l >= len) { + it->length += len; + return; + } else { + offset += l; + len -= l; + it->length += l; + } + } + + while (len > max_length) { + res->emplace_back(offset, max_length); + offset += max_length; + len -= max_length; + } + res->emplace_back(offset, len); + return; + } + + if (it != res->rend() && it->offset + it->length == offset) { + it->length += len; + } else { + res->emplace_back(offset, len); + } + } + + bool _allocate_l0(uint64_t length, + uint64_t max_length, + uint64_t l0_pos0, uint64_t l0_pos1, + uint64_t* allocated, + interval_vector_t* res) + { + uint64_t d0 = L0_ENTRIES_PER_SLOT; + + ++l0_dives; + + ceph_assert(l0_pos0 < l0_pos1); + ceph_assert(length > *allocated); + ceph_assert(0 == (l0_pos0 % (slots_per_slotset * d0))); + ceph_assert(0 == (l0_pos1 % (slots_per_slotset * d0))); + ceph_assert(((length - *allocated) % l0_granularity) == 0); + + uint64_t need_entries = (length - *allocated) / l0_granularity; + + for (auto idx = l0_pos0 / d0; (idx < l0_pos1 / d0) && (length > *allocated); + ++idx) { + ++l0_iterations; + slot_t& slot_val = l0[idx]; + auto base = idx * d0; + if (slot_val == all_slot_clear) { + continue; + } else if (slot_val == all_slot_set) { + uint64_t to_alloc = std::min(need_entries, d0); + *allocated += to_alloc * l0_granularity; + ++alloc_fragments; + need_entries -= to_alloc; + + _fragment_and_emplace(max_length, base * l0_granularity, + to_alloc * l0_granularity, res); + + if (to_alloc == d0) { + slot_val = all_slot_clear; + } else { + _mark_alloc_l0(base, base + to_alloc); + } + continue; + } + + auto free_pos = find_next_set_bit(slot_val, 0); + ceph_assert(free_pos < bits_per_slot); + auto next_pos = free_pos + 1; + while (next_pos < bits_per_slot && + (next_pos - free_pos) < need_entries) { + ++l0_inner_iterations; + + if (0 == (slot_val & (slot_t(1) << next_pos))) { + auto to_alloc = (next_pos - free_pos); + *allocated += to_alloc * l0_granularity; + ++alloc_fragments; + need_entries -= to_alloc; + _fragment_and_emplace(max_length, (base + free_pos) * l0_granularity, + to_alloc * l0_granularity, res); + _mark_alloc_l0(base + free_pos, base + next_pos); + free_pos = find_next_set_bit(slot_val, next_pos + 1); + next_pos = free_pos + 1; + } else { + ++next_pos; + } + } + if (need_entries && free_pos < bits_per_slot) { + auto to_alloc = std::min(need_entries, d0 - free_pos); + *allocated += to_alloc * l0_granularity; + ++alloc_fragments; + need_entries -= to_alloc; + _fragment_and_emplace(max_length, (base + free_pos) * l0_granularity, + to_alloc * l0_granularity, res); + _mark_alloc_l0(base + free_pos, base + free_pos + to_alloc); + } + } + return _is_empty_l0(l0_pos0, l0_pos1); + } + +protected: + + friend class AllocatorLevel02<AllocatorLevel01Loose>; + + void _init(uint64_t capacity, uint64_t _alloc_unit, bool mark_as_free = true) + { + l0_granularity = _alloc_unit; + // 512 bits at L0 mapped to L1 entry + l1_granularity = l0_granularity * bits_per_slotset; + + // capacity to have slot alignment at l1 + auto aligned_capacity = + p2roundup((int64_t)capacity, + int64_t(l1_granularity * slots_per_slotset * _children_per_slot())); + size_t slot_count = + aligned_capacity / l1_granularity / _children_per_slot(); + // we use set bit(s) as a marker for (partially) free entry + l1.resize(slot_count, mark_as_free ? all_slot_set : all_slot_clear); + + // l0 slot count + size_t slot_count_l0 = aligned_capacity / _alloc_unit / bits_per_slot; + // we use set bit(s) as a marker for (partially) free entry + l0.resize(slot_count_l0, mark_as_free ? all_slot_set : all_slot_clear); + + partial_l1_count = unalloc_l1_count = 0; + if (mark_as_free) { + unalloc_l1_count = slot_count * _children_per_slot(); + auto l0_pos_no_use = p2roundup((int64_t)capacity, (int64_t)l0_granularity) / l0_granularity; + _mark_alloc_l1_l0(l0_pos_no_use, aligned_capacity / l0_granularity); + } + } + + struct search_ctx_t + { + size_t partial_count = 0; + size_t free_count = 0; + uint64_t free_l1_pos = 0; + + uint64_t min_affordable_len = 0; + uint64_t min_affordable_offs = 0; + uint64_t affordable_len = 0; + uint64_t affordable_offs = 0; + + bool fully_processed = false; + + void reset() + { + *this = search_ctx_t(); + } + }; + enum { + NO_STOP, + STOP_ON_EMPTY, + STOP_ON_PARTIAL, + }; + void _analyze_partials(uint64_t pos_start, uint64_t pos_end, + uint64_t length, uint64_t min_length, int mode, + search_ctx_t* ctx); + + void _mark_l1_on_l0(int64_t l0_pos, int64_t l0_pos_end); + void _mark_alloc_l0(int64_t l0_pos_start, int64_t l0_pos_end); + uint64_t _claim_free_to_left_l0(int64_t l0_pos_start); + uint64_t _claim_free_to_right_l0(int64_t l0_pos_start); + + + void _mark_alloc_l1_l0(int64_t l0_pos_start, int64_t l0_pos_end) + { + _mark_alloc_l0(l0_pos_start, l0_pos_end); + l0_pos_start = p2align(l0_pos_start, int64_t(bits_per_slotset)); + l0_pos_end = p2roundup(l0_pos_end, int64_t(bits_per_slotset)); + _mark_l1_on_l0(l0_pos_start, l0_pos_end); + } + + void _mark_free_l0(int64_t l0_pos_start, int64_t l0_pos_end) + { + auto d0 = L0_ENTRIES_PER_SLOT; + + auto pos = l0_pos_start; + slot_t bits = (slot_t)1 << (l0_pos_start % d0); + slot_t* val_s = &l0[pos / d0]; + int64_t pos_e = std::min(l0_pos_end, + p2roundup<int64_t>(l0_pos_start + 1, d0)); + while (pos < pos_e) { + *val_s |= bits; + bits <<= 1; + pos++; + } + pos_e = std::min(l0_pos_end, p2align<int64_t>(l0_pos_end, d0)); + while (pos < pos_e) { + *(++val_s) = all_slot_set; + pos += d0; + } + bits = 1; + ++val_s; + while (pos < l0_pos_end) { + *val_s |= bits; + bits <<= 1; + pos++; + } + } + + void _mark_free_l1_l0(int64_t l0_pos_start, int64_t l0_pos_end) + { + _mark_free_l0(l0_pos_start, l0_pos_end); + l0_pos_start = p2align(l0_pos_start, int64_t(bits_per_slotset)); + l0_pos_end = p2roundup(l0_pos_end, int64_t(bits_per_slotset)); + _mark_l1_on_l0(l0_pos_start, l0_pos_end); + } + + bool _is_empty_l0(uint64_t l0_pos, uint64_t l0_pos_end) + { + bool no_free = true; + uint64_t d = slots_per_slotset * L0_ENTRIES_PER_SLOT; + ceph_assert(0 == (l0_pos % d)); + ceph_assert(0 == (l0_pos_end % d)); + + auto idx = l0_pos / L0_ENTRIES_PER_SLOT; + auto idx_end = l0_pos_end / L0_ENTRIES_PER_SLOT; + while (idx < idx_end && no_free) { + no_free = l0[idx] == all_slot_clear; + ++idx; + } + return no_free; + } + bool _is_empty_l1(uint64_t l1_pos, uint64_t l1_pos_end) + { + bool no_free = true; + uint64_t d = slots_per_slotset * _children_per_slot(); + ceph_assert(0 == (l1_pos % d)); + ceph_assert(0 == (l1_pos_end % d)); + + auto idx = l1_pos / L1_ENTRIES_PER_SLOT; + auto idx_end = l1_pos_end / L1_ENTRIES_PER_SLOT; + while (idx < idx_end && no_free) { + no_free = _is_slot_fully_allocated(idx); + ++idx; + } + return no_free; + } + + interval_t _allocate_l1_contiguous(uint64_t length, + uint64_t min_length, uint64_t max_length, + uint64_t pos_start, uint64_t pos_end); + + bool _allocate_l1(uint64_t length, + uint64_t min_length, uint64_t max_length, + uint64_t l1_pos_start, uint64_t l1_pos_end, + uint64_t* allocated, + interval_vector_t* res); + + uint64_t _mark_alloc_l1(uint64_t offset, uint64_t length) + { + uint64_t l0_pos_start = offset / l0_granularity; + uint64_t l0_pos_end = p2roundup(offset + length, l0_granularity) / l0_granularity; + _mark_alloc_l1_l0(l0_pos_start, l0_pos_end); + return l0_granularity * (l0_pos_end - l0_pos_start); + } + + uint64_t _free_l1(uint64_t offs, uint64_t len) + { + uint64_t l0_pos_start = offs / l0_granularity; + uint64_t l0_pos_end = p2roundup(offs + len, l0_granularity) / l0_granularity; + _mark_free_l1_l0(l0_pos_start, l0_pos_end); + return l0_granularity * (l0_pos_end - l0_pos_start); + } + + uint64_t claim_free_to_left_l1(uint64_t offs) + { + uint64_t l0_pos_end = offs / l0_granularity; + uint64_t l0_pos_start = _claim_free_to_left_l0(l0_pos_end); + if (l0_pos_start < l0_pos_end) { + _mark_l1_on_l0( + p2align(l0_pos_start, uint64_t(bits_per_slotset)), + p2roundup(l0_pos_end, uint64_t(bits_per_slotset))); + return l0_granularity * (l0_pos_end - l0_pos_start); + } + return 0; + } + + uint64_t claim_free_to_right_l1(uint64_t offs) + { + uint64_t l0_pos_start = offs / l0_granularity; + uint64_t l0_pos_end = _claim_free_to_right_l0(l0_pos_start); + + if (l0_pos_start < l0_pos_end) { + _mark_l1_on_l0( + p2align(l0_pos_start, uint64_t(bits_per_slotset)), + p2roundup(l0_pos_end, uint64_t(bits_per_slotset))); + return l0_granularity * (l0_pos_end - l0_pos_start); + } + return 0; + } + + +public: + uint64_t debug_get_allocated(uint64_t pos0 = 0, uint64_t pos1 = 0) + { + if (pos1 == 0) { + pos1 = l1.size() * L1_ENTRIES_PER_SLOT; + } + auto avail = debug_get_free(pos0, pos1); + return (pos1 - pos0) * l1_granularity - avail; + } + + uint64_t debug_get_free(uint64_t l1_pos0 = 0, uint64_t l1_pos1 = 0) + { + ceph_assert(0 == (l1_pos0 % L1_ENTRIES_PER_SLOT)); + ceph_assert(0 == (l1_pos1 % L1_ENTRIES_PER_SLOT)); + + auto idx0 = l1_pos0 * slots_per_slotset; + auto idx1 = l1_pos1 * slots_per_slotset; + + if (idx1 == 0) { + idx1 = l0.size(); + } + + uint64_t res = 0; + for (uint64_t i = idx0; i < idx1; ++i) { + auto v = l0[i]; + if (v == all_slot_set) { + res += L0_ENTRIES_PER_SLOT; + } else if (v != all_slot_clear) { + size_t cnt = 0; +#ifdef __GNUC__ + cnt = __builtin_popcountll(v); +#else + // Kernighan's Alg to count set bits + while (v) { + v &= (v - 1); + cnt++; + } +#endif + res += cnt; + } + } + return res * l0_granularity; + } + void collect_stats( + std::map<size_t, size_t>& bins_overall) override; + + static inline ssize_t count_0s(slot_t slot_val, size_t start_pos); + static inline ssize_t count_1s(slot_t slot_val, size_t start_pos); + void foreach_internal(std::function<void(uint64_t offset, uint64_t length)> notify); +}; + + +class AllocatorLevel01Compact : public AllocatorLevel01 +{ + uint64_t _children_per_slot() const override + { + return 8; + } +public: + void collect_stats( + std::map<size_t, size_t>& bins_overall) override + { + // not implemented + } +}; + +template <class L1> +class AllocatorLevel02 : public AllocatorLevel +{ +public: + uint64_t debug_get_free(uint64_t pos0 = 0, uint64_t pos1 = 0) + { + std::lock_guard l(lock); + return l1.debug_get_free(pos0 * l1._children_per_slot() * bits_per_slot, + pos1 * l1._children_per_slot() * bits_per_slot); + } + uint64_t debug_get_allocated(uint64_t pos0 = 0, uint64_t pos1 = 0) + { + std::lock_guard l(lock); + return l1.debug_get_allocated(pos0 * l1._children_per_slot() * bits_per_slot, + pos1 * l1._children_per_slot() * bits_per_slot); + } + + uint64_t get_available() + { + std::lock_guard l(lock); + return available; + } + inline uint64_t get_min_alloc_size() const + { + return l1.get_min_alloc_size(); + } + void collect_stats( + std::map<size_t, size_t>& bins_overall) override { + + std::lock_guard l(lock); + l1.collect_stats(bins_overall); + } + uint64_t claim_free_to_left(uint64_t offset) { + std::lock_guard l(lock); + auto allocated = l1.claim_free_to_left_l1(offset); + ceph_assert(available >= allocated); + available -= allocated; + + uint64_t l2_pos = (offset - allocated) / l2_granularity; + uint64_t l2_pos_end = + p2roundup(int64_t(offset), int64_t(l2_granularity)) / l2_granularity; + _mark_l2_on_l1(l2_pos, l2_pos_end); + return allocated; + } + + uint64_t claim_free_to_right(uint64_t offset) { + std::lock_guard l(lock); + auto allocated = l1.claim_free_to_right_l1(offset); + ceph_assert(available >= allocated); + available -= allocated; + + uint64_t l2_pos = (offset) / l2_granularity; + int64_t end = offset + allocated; + uint64_t l2_pos_end = p2roundup(end, int64_t(l2_granularity)) / l2_granularity; + _mark_l2_on_l1(l2_pos, l2_pos_end); + return allocated; + } + + void foreach_internal( + std::function<void(uint64_t offset, uint64_t length)> notify) + { + size_t alloc_size = get_min_alloc_size(); + auto multiply_by_alloc_size = [alloc_size, notify](size_t off, size_t len) { + notify(off * alloc_size, len * alloc_size); + }; + std::lock_guard l(lock); + l1.foreach_internal(multiply_by_alloc_size); + } + double get_fragmentation_internal() { + std::lock_guard l(lock); + return l1.get_fragmentation(); + } + +protected: + ceph::mutex lock = ceph::make_mutex("AllocatorLevel02::lock"); + L1 l1; + slot_vector_t l2; + uint64_t l2_granularity = 0; // space per entry + uint64_t available = 0; + uint64_t last_pos = 0; + + enum { + L1_ENTRIES_PER_SLOT = bits_per_slot, // 64 + }; + + uint64_t _children_per_slot() const override + { + return L1_ENTRIES_PER_SLOT; + } + uint64_t _level_granularity() const override + { + return l2_granularity; + } + + void _init(uint64_t capacity, uint64_t _alloc_unit, bool mark_as_free = true) + { + ceph_assert(isp2(_alloc_unit)); + l1._init(capacity, _alloc_unit, mark_as_free); + + l2_granularity = + l1._level_granularity() * l1._children_per_slot() * slots_per_slotset; + + // capacity to have slot alignment at l2 + auto aligned_capacity = + p2roundup((int64_t)capacity, (int64_t)l2_granularity * L1_ENTRIES_PER_SLOT); + size_t elem_count = aligned_capacity / l2_granularity / L1_ENTRIES_PER_SLOT; + // we use set bit(s) as a marker for (partially) free entry + l2.resize(elem_count, mark_as_free ? all_slot_set : all_slot_clear); + + if (mark_as_free) { + // capacity to have slotset alignment at l1 + auto l2_pos_no_use = + p2roundup((int64_t)capacity, (int64_t)l2_granularity) / l2_granularity; + _mark_l2_allocated(l2_pos_no_use, aligned_capacity / l2_granularity); + available = p2align(capacity, _alloc_unit); + } else { + available = 0; + } + } + + void _mark_l2_allocated(int64_t l2_pos, int64_t l2_pos_end) + { + auto d = L1_ENTRIES_PER_SLOT; + ceph_assert(0 <= l2_pos_end); + ceph_assert((int64_t)l2.size() >= (l2_pos_end / d)); + + while (l2_pos < l2_pos_end) { + l2[l2_pos / d] &= ~(slot_t(1) << (l2_pos % d)); + ++l2_pos; + } + } + + void _mark_l2_free(int64_t l2_pos, int64_t l2_pos_end) + { + auto d = L1_ENTRIES_PER_SLOT; + ceph_assert(0 <= l2_pos_end); + ceph_assert((int64_t)l2.size() >= (l2_pos_end / d)); + + while (l2_pos < l2_pos_end) { + l2[l2_pos / d] |= (slot_t(1) << (l2_pos % d)); + ++l2_pos; + } + } + + void _mark_l2_on_l1(int64_t l2_pos, int64_t l2_pos_end) + { + auto d = L1_ENTRIES_PER_SLOT; + ceph_assert(0 <= l2_pos_end); + ceph_assert((int64_t)l2.size() >= (l2_pos_end / d)); + + auto idx = l2_pos * slots_per_slotset; + auto idx_end = l2_pos_end * slots_per_slotset; + bool all_allocated = true; + while (idx < idx_end) { + if (!l1._is_slot_fully_allocated(idx)) { + all_allocated = false; + idx = p2roundup(int64_t(++idx), int64_t(slots_per_slotset)); + } + else { + ++idx; + } + if ((idx % slots_per_slotset) == 0) { + if (all_allocated) { + l2[l2_pos / d] &= ~(slot_t(1) << (l2_pos % d)); + } + else { + l2[l2_pos / d] |= (slot_t(1) << (l2_pos % d)); + } + all_allocated = true; + ++l2_pos; + } + } + } + + void _allocate_l2(uint64_t length, + uint64_t min_length, + uint64_t max_length, + uint64_t hint, + + uint64_t* allocated, + interval_vector_t* res) + { + uint64_t prev_allocated = *allocated; + uint64_t d = L1_ENTRIES_PER_SLOT; + ceph_assert(min_length <= l2_granularity); + ceph_assert(max_length == 0 || max_length >= min_length); + ceph_assert(max_length == 0 || (max_length % min_length) == 0); + ceph_assert(length >= min_length); + ceph_assert((length % min_length) == 0); + + uint64_t cap = 1ull << 31; + if (max_length == 0 || max_length >= cap) { + max_length = cap; + } + + uint64_t l1_w = slots_per_slotset * l1._children_per_slot(); + + std::lock_guard l(lock); + + if (available < min_length) { + return; + } + if (hint != 0) { + last_pos = (hint / (d * l2_granularity)) < l2.size() ? p2align(hint / l2_granularity, d) : 0; + } + auto l2_pos = last_pos; + auto last_pos0 = last_pos; + auto pos = last_pos / d; + auto pos_end = l2.size(); + // outer loop below is intended to optimize the performance by + // avoiding 'modulo' operations inside the internal loop. + // Looks like they have negative impact on the performance + for (auto i = 0; i < 2; ++i) { + for(; length > *allocated && pos < pos_end; ++pos) { + slot_t& slot_val = l2[pos]; + size_t free_pos = 0; + bool all_set = false; + if (slot_val == all_slot_clear) { + l2_pos += d; + last_pos = l2_pos; + continue; + } else if (slot_val == all_slot_set) { + free_pos = 0; + all_set = true; + } else { + free_pos = find_next_set_bit(slot_val, 0); + ceph_assert(free_pos < bits_per_slot); + } + do { + ceph_assert(length > *allocated); + bool empty = l1._allocate_l1(length, + min_length, + max_length, + (l2_pos + free_pos) * l1_w, + (l2_pos + free_pos + 1) * l1_w, + allocated, + res); + if (empty) { + slot_val &= ~(slot_t(1) << free_pos); + } + if (length <= *allocated || slot_val == all_slot_clear) { + break; + } + ++free_pos; + if (!all_set) { + free_pos = find_next_set_bit(slot_val, free_pos); + } + } while (free_pos < bits_per_slot); + last_pos = l2_pos; + l2_pos += d; + } + l2_pos = 0; + pos = 0; + pos_end = last_pos0 / d; + } + + ++l2_allocs; + auto allocated_here = *allocated - prev_allocated; + ceph_assert(available >= allocated_here); + available -= allocated_here; + } + +#ifndef NON_CEPH_BUILD + // to provide compatibility with BlueStore's allocator interface + void _free_l2(const interval_set<uint64_t> & rr) + { + uint64_t released = 0; + std::lock_guard l(lock); + for (auto r : rr) { + released += l1._free_l1(r.first, r.second); + uint64_t l2_pos = r.first / l2_granularity; + uint64_t l2_pos_end = p2roundup(int64_t(r.first + r.second), int64_t(l2_granularity)) / l2_granularity; + + _mark_l2_free(l2_pos, l2_pos_end); + } + available += released; + } +#endif + + template <typename T> + void _free_l2(const T& rr) + { + uint64_t released = 0; + std::lock_guard l(lock); + for (auto r : rr) { + released += l1._free_l1(r.offset, r.length); + uint64_t l2_pos = r.offset / l2_granularity; + uint64_t l2_pos_end = p2roundup(int64_t(r.offset + r.length), int64_t(l2_granularity)) / l2_granularity; + + _mark_l2_free(l2_pos, l2_pos_end); + } + available += released; + } + + void _mark_allocated(uint64_t o, uint64_t len) + { + uint64_t l2_pos = o / l2_granularity; + uint64_t l2_pos_end = p2roundup(int64_t(o + len), int64_t(l2_granularity)) / l2_granularity; + + std::lock_guard l(lock); + auto allocated = l1._mark_alloc_l1(o, len); + ceph_assert(available >= allocated); + available -= allocated; + _mark_l2_on_l1(l2_pos, l2_pos_end); + } + + void _mark_free(uint64_t o, uint64_t len) + { + uint64_t l2_pos = o / l2_granularity; + uint64_t l2_pos_end = p2roundup(int64_t(o + len), int64_t(l2_granularity)) / l2_granularity; + + std::lock_guard l(lock); + available += l1._free_l1(o, len); + _mark_l2_free(l2_pos, l2_pos_end); + } + void _shutdown() + { + last_pos = 0; + } +}; + +#endif diff --git a/src/os/bluestore/zoned_types.cc b/src/os/bluestore/zoned_types.cc new file mode 100644 index 000000000..f33bd89e3 --- /dev/null +++ b/src/os/bluestore/zoned_types.cc @@ -0,0 +1,24 @@ +#include "zoned_types.h" + +using ceph::decode; +using ceph::encode; + +std::ostream& operator<<(std::ostream& out, + const zone_state_t& zone_state) { + return out << " zone: 0x" << std::hex + << " dead bytes: 0x" << zone_state.get_num_dead_bytes() + << " write pointer: 0x" << zone_state.get_write_pointer() + << " " << std::dec; +} + +void zone_state_t::encode(ceph::buffer::list &bl) const { + uint64_t v = static_cast<uint64_t>(num_dead_bytes) << 32 | write_pointer; + ::encode(v, bl); +} + +void zone_state_t::decode(ceph::buffer::list::const_iterator &p) { + uint64_t v; + ::decode(v, p); + num_dead_bytes = v >> 32; + write_pointer = v; // discard left-most 32 bits +} diff --git a/src/os/bluestore/zoned_types.h b/src/os/bluestore/zoned_types.h new file mode 100644 index 000000000..6ff5d5f31 --- /dev/null +++ b/src/os/bluestore/zoned_types.h @@ -0,0 +1,44 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab +#ifndef CEPH_OS_BLUESTORE_ZONED_TYPES_H +#define CEPH_OS_BLUESTORE_ZONED_TYPES_H + +#include "include/types.h" +#include "kv/KeyValueDB.h" +#include "os/kv.h" + +// Tracks two bits of information about the state of a zone: (1) number of dead +// bytes in a zone and (2) the write pointer. We assume that for now 32 bits is +// enough for the zone capacity and represent these as uint32_t, and we store +// them as a single 64-bit value in RocksDB so that we can use the existing +// Int64ArrayMergeOperator for merge and avoid the cost of point queries. +// +// We use the same struct for an on-disk and in-memory representation of the +// state. +struct zone_state_t { + uint32_t num_dead_bytes = 0; + uint32_t write_pointer = 0; + + void encode(ceph::buffer::list &bl) const; + void decode(ceph::buffer::list::const_iterator &p); + + uint64_t get_num_dead_bytes() const { + return num_dead_bytes; + } + + uint64_t get_write_pointer() const { + return write_pointer; + } + + void increment_num_dead_bytes(uint64_t num_bytes) { + num_dead_bytes += num_bytes; + } + + void increment_write_pointer(uint64_t num_bytes) { + write_pointer += num_bytes; + } +}; + +std::ostream& operator<<(std::ostream& out, const zone_state_t& zone_state); + +#endif |