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Diffstat (limited to '')
| -rw-r--r-- | src/os/bluestore/BlueStore.cc | 15265 |
1 files changed, 15265 insertions, 0 deletions
diff --git a/src/os/bluestore/BlueStore.cc b/src/os/bluestore/BlueStore.cc new file mode 100644 index 00000000..d701ef4d --- /dev/null +++ b/src/os/bluestore/BlueStore.cc @@ -0,0 +1,15265 @@ +// -*- 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 <boost/container/flat_set.hpp> +#include "boost/algorithm/string.hpp" + +#include "include/cpp-btree/btree_set.h" + +#include "BlueStore.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 "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" + +#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); + + +// 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_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 offset -> shared_blob_t + +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; +} + +// some things we encode in binary (as le32 or le64); print the +// resulting key strings nicely +template<typename S> +static string pretty_binary_string(const S& in) +{ + char buf[10]; + string out; + out.reserve(in.length() * 3); + enum { NONE, HEX, STRING } mode = NONE; + unsigned from = 0, i; + for (i=0; i < in.length(); ++i) { + if ((in[i] < 32 || (unsigned char)in[i] > 126) || + (mode == HEX && in.length() - i >= 4 && + ((in[i] < 32 || (unsigned char)in[i] > 126) || + (in[i+1] < 32 || (unsigned char)in[i+1] > 126) || + (in[i+2] < 32 || (unsigned char)in[i+2] > 126) || + (in[i+3] < 32 || (unsigned char)in[i+3] > 126)))) { + if (mode == STRING) { + out.append(in.c_str() + from, i - from); + out.push_back('\''); + } + if (mode != HEX) { + out.append("0x"); + mode = HEX; + } + if (in.length() - i >= 4) { + // print a whole u32 at once + snprintf(buf, sizeof(buf), "%08x", + (uint32_t)(((unsigned char)in[i] << 24) | + ((unsigned char)in[i+1] << 16) | + ((unsigned char)in[i+2] << 8) | + ((unsigned char)in[i+3] << 0))); + i += 3; + } else { + snprintf(buf, sizeof(buf), "%02x", (int)(unsigned char)in[i]); + } + out.append(buf); + } else { + if (mode != STRING) { + out.push_back('\''); + mode = STRING; + from = i; + } + } + } + if (mode == STRING) { + out.append(in.c_str() + from, i - from); + out.push_back('\''); + } + return out; +} + +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) +{ + spg_t pgid; + 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 > 0xffffffffull) + end_hash = 0xffffffffull; + + 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(0xffffffff); + + // 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_omap_header(uint64_t id, string *out) +{ + _key_encode_u64(id, out); + out->push_back('-'); +} + +// hmm, I don't think there's any need to escape the user key since we +// have a clean prefix. +static void get_omap_key(uint64_t id, const string& key, string *out) +{ + _key_encode_u64(id, out); + out->push_back('.'); + out->append(key); +} + +static void rewrite_omap_key(uint64_t id, string old, string *out) +{ + _key_encode_u64(id, out); + out->append(old.c_str() + out->length(), old.size() - out->length()); +} + +static void decode_omap_key(const string& key, string *user_key) +{ + *user_key = key.substr(sizeof(uint64_t) + 1); +} + +static void get_omap_tail(uint64_t id, string *out) +{ + _key_encode_u64(id, out); + out->push_back('~'); +} + +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; +} + +// 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"; + } +}; + + +// 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() { + if (!valid()) { + return; + } + + if (is_extent_shard_key(m_it->key())) { + next(); + return; + } + + m_oid = ghobject_t(); + 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; +} + +// Cache + +BlueStore::Cache *BlueStore::Cache::create(CephContext* cct, string type, + PerfCounters *logger) +{ + Cache *c = nullptr; + + if (type == "lru") + c = new LRUCache(cct); + else if (type == "2q") + c = new TwoQCache(cct); + else + ceph_abort_msg("unrecognized cache type"); + + c->logger = logger; + return c; +} + +void BlueStore::Cache::trim(uint64_t onode_max, uint64_t buffer_max) +{ + std::lock_guard l(lock); + if (cct->_conf->objectstore_blackhole) { + // do not trim if we are throwing away IOs a layer down + return; + } + _trim(onode_max, buffer_max); +} + +void BlueStore::Cache::trim_all() +{ + std::lock_guard l(lock); + // we should not be shutting down after the blackhole is enabled + assert(!cct->_conf->objectstore_blackhole); + _trim(0, 0); +} + +// LRUCache +#undef dout_prefix +#define dout_prefix *_dout << "bluestore.LRUCache(" << this << ") " + +void BlueStore::LRUCache::_touch_onode(OnodeRef& o) +{ + auto p = onode_lru.iterator_to(*o); + onode_lru.erase(p); + onode_lru.push_front(*o); +} + +void BlueStore::LRUCache::_trim(uint64_t onode_max, uint64_t buffer_max) +{ + dout(20) << __func__ << " onodes " << onode_lru.size() << " / " << onode_max + << " buffers " << buffer_size << " / " << buffer_max + << dendl; + + _audit("trim start"); + + // buffers + while (buffer_size > buffer_max) { + auto i = buffer_lru.rbegin(); + if (i == buffer_lru.rend()) { + // stop if buffer_lru is now empty + break; + } + + Buffer *b = &*i; + ceph_assert(b->is_clean()); + dout(20) << __func__ << " rm " << *b << dendl; + b->space->_rm_buffer(this, b); + } + + // onodes + if (onode_max >= onode_lru.size() || + last_pinned == onode_lru.begin()) { + return; // don't even try + } + uint64_t num = onode_lru.size() - onode_max; + + auto p = last_pinned; + last_pinned = onode_lru.end(); + ceph_assert(p != onode_lru.begin()); + --p; + int skipped = 0; + int max_skipped = g_conf()->bluestore_cache_trim_max_skip_pinned; + while (num > 0) { + Onode *o = &*p; + int refs = o->nref.load(); + if (refs > 1) { + dout(20) << __func__ << " " << o->oid << " has " << refs + << " refs, skipping" << dendl; + if (++skipped >= max_skipped) { + dout(15) << __func__ << " maximum skip pinned reached; stopping with " + << num << " left to trim" << dendl; + last_pinned = p; + break; + } + + if (p == onode_lru.begin()) { + break; + } else { + p--; + num--; + continue; + } + } + dout(30) << __func__ << " rm " << o->oid << dendl; + if (p != onode_lru.begin()) { + _onode_lru_erase(p--); + } else { + _onode_lru_erase(p); + num = 1; // fake num to end the loop + // in we might still have some pinned onodes + } + o->get(); // paranoia + o->c->onode_map.remove(o->oid); + o->put(); + --num; + } +} + +#ifdef DEBUG_CACHE +void BlueStore::LRUCache::_audit(const char *when) +{ + dout(10) << __func__ << " " << when << " start" << dendl; + uint64_t s = 0; + for (auto i = buffer_lru.begin(); i != buffer_lru.end(); ++i) { + s += i->length; + } + if (s != buffer_size) { + derr << __func__ << " buffer_size " << buffer_size << " actual " << s + << dendl; + for (auto i = buffer_lru.begin(); i != buffer_lru.end(); ++i) { + derr << __func__ << " " << *i << dendl; + } + ceph_assert(s == buffer_size); + } + dout(20) << __func__ << " " << when << " buffer_size " << buffer_size + << " ok" << dendl; +} +#endif + +// TwoQCache +#undef dout_prefix +#define dout_prefix *_dout << "bluestore.2QCache(" << this << ") " + + +void BlueStore::TwoQCache::_touch_onode(OnodeRef& o) +{ + auto p = onode_lru.iterator_to(*o); + _onode_lru_erase(p); + onode_lru.push_front(*o); +} + +void BlueStore::TwoQCache::_add_buffer(Buffer *b, int level, Buffer *near) +{ + 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: + buffer_warm_in.insert(buffer_warm_in.iterator_to(*near), *b); + break; + case BUFFER_WARM_OUT: + ceph_assert(b->is_empty()); + buffer_warm_out.insert(buffer_warm_out.iterator_to(*near), *b); + break; + case BUFFER_HOT: + buffer_hot.insert(buffer_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) { + buffer_warm_in.push_front(*b); + } else { + // take caller hint to start at the back of the warm queue + buffer_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; + buffer_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; + buffer_hot.push_front(*b); + break; + default: + ceph_abort_msg("bad cache_private"); + } + } + if (!b->is_empty()) { + buffer_bytes += b->length; + buffer_list_bytes[b->cache_private] += b->length; + } +} + +void BlueStore::TwoQCache::_rm_buffer(Buffer *b) +{ + dout(20) << __func__ << " " << *b << dendl; + if (!b->is_empty()) { + ceph_assert(buffer_bytes >= b->length); + buffer_bytes -= b->length; + ceph_assert(buffer_list_bytes[b->cache_private] >= b->length); + buffer_list_bytes[b->cache_private] -= b->length; + } + switch (b->cache_private) { + case BUFFER_WARM_IN: + buffer_warm_in.erase(buffer_warm_in.iterator_to(*b)); + break; + case BUFFER_WARM_OUT: + buffer_warm_out.erase(buffer_warm_out.iterator_to(*b)); + break; + case BUFFER_HOT: + buffer_hot.erase(buffer_hot.iterator_to(*b)); + break; + default: + ceph_abort_msg("bad cache_private"); + } +} + +void BlueStore::TwoQCache::_move_buffer(Cache *srcc, Buffer *b) +{ + TwoQCache *src = static_cast<TwoQCache*>(srcc); + src->_rm_buffer(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()); + buffer_warm_in.push_back(*b); + break; + case BUFFER_WARM_OUT: + ceph_assert(b->is_empty()); + buffer_warm_out.push_back(*b); + break; + case BUFFER_HOT: + ceph_assert(!b->is_empty()); + buffer_hot.push_back(*b); + break; + default: + ceph_abort_msg("bad cache_private"); + } + if (!b->is_empty()) { + buffer_bytes += b->length; + buffer_list_bytes[b->cache_private] += b->length; + } +} + +void BlueStore::TwoQCache::_adjust_buffer_size(Buffer *b, int64_t delta) +{ + 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)buffer_list_bytes[b->cache_private] + delta >= 0); + buffer_list_bytes[b->cache_private] += delta; + } +} + +void BlueStore::TwoQCache::_trim(uint64_t onode_max, uint64_t buffer_max) +{ + dout(20) << __func__ << " onodes " << onode_lru.size() << " / " << onode_max + << " buffers " << buffer_bytes << " / " << buffer_max + << dendl; + + _audit("trim start"); + + // buffers + if (buffer_bytes > buffer_max) { + uint64_t kin = buffer_max * cct->_conf->bluestore_2q_cache_kin_ratio; + uint64_t khot = buffer_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 = buffer_hot.size() + buffer_warm_in.size(); + if (buffer_num) { + uint64_t buffer_avg_size = buffer_bytes / buffer_num; + ceph_assert(buffer_avg_size); + uint64_t calculated_buffer_num = buffer_max / buffer_avg_size; + kout = calculated_buffer_num * cct->_conf->bluestore_2q_cache_kout_ratio; + } + + if (buffer_list_bytes[BUFFER_HOT] < khot) { + // hot is small, give slack to warm_in + kin += khot - buffer_list_bytes[BUFFER_HOT]; + } else if (buffer_list_bytes[BUFFER_WARM_IN] < kin) { + // warm_in is small, give slack to hot + khot += kin - buffer_list_bytes[BUFFER_WARM_IN]; + } + + // adjust warm_in list + int64_t to_evict_bytes = buffer_list_bytes[BUFFER_WARM_IN] - kin; + uint64_t evicted = 0; + + while (to_evict_bytes > 0) { + auto p = buffer_warm_in.rbegin(); + if (p == buffer_warm_in.rend()) { + // stop if warm_in list is now empty + break; + } + + 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(buffer_list_bytes[BUFFER_WARM_IN] >= b->length); + buffer_list_bytes[BUFFER_WARM_IN] -= b->length; + to_evict_bytes -= b->length; + evicted += b->length; + b->state = Buffer::STATE_EMPTY; + b->data.clear(); + buffer_warm_in.erase(buffer_warm_in.iterator_to(*b)); + buffer_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 = buffer_list_bytes[BUFFER_HOT] - khot; + evicted = 0; + + while (to_evict_bytes > 0) { + auto p = buffer_hot.rbegin(); + if (p == buffer_hot.rend()) { + // stop if hot list is now empty + break; + } + + 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 num = buffer_warm_out.size() - kout; + while (num-- > 0) { + Buffer *b = &*buffer_warm_out.rbegin(); + ceph_assert(b->is_empty()); + dout(20) << __func__ << " buffer_warm_out rm " << *b << dendl; + b->space->_rm_buffer(this, b); + } + } + + // onodes + if (onode_max >= onode_lru.size() || + last_pinned == onode_lru.begin()) { + return; // don't even try + } + uint64_t num = onode_lru.size() - onode_max; + + auto p = last_pinned; + last_pinned = onode_lru.end(); + ceph_assert(p != onode_lru.begin()); + --p; + int skipped = 0; + int max_skipped = g_conf()->bluestore_cache_trim_max_skip_pinned; + while (num > 0) { + Onode *o = &*p; + dout(20) << __func__ << " considering " << o << dendl; + int refs = o->nref.load(); + if (refs > 1) { + dout(20) << __func__ << " " << o->oid << " has " << refs + << " refs; skipping" << dendl; + if (++skipped >= max_skipped) { + dout(15) << __func__ << " maximum skip pinned reached; stopping with " + << num << " left to trim" << dendl; + last_pinned = p; + break; + } + + if (p == onode_lru.begin()) { + break; + } else { + p--; + num--; + continue; + } + } + dout(30) << __func__ << " " << o->oid << " num=" << num <<" lru size="<<onode_lru.size()<< dendl; + if (p != onode_lru.begin()) { + _onode_lru_erase(p--); + } else { + _onode_lru_erase(p); + num = 1; // fake num to end the loop + // in we might still have some pinned onodes + } + o->get(); // paranoia + o->c->onode_map.remove(o->oid); + o->put(); + --num; + } +} + +#ifdef DEBUG_CACHE +void BlueStore::TwoQCache::_audit(const char *when) +{ + dout(10) << __func__ << " " << when << " start" << dendl; + uint64_t s = 0; + for (auto i = buffer_hot.begin(); i != buffer_hot.end(); ++i) { + s += i->length; + } + + uint64_t hot_bytes = s; + if (hot_bytes != buffer_list_bytes[BUFFER_HOT]) { + derr << __func__ << " hot_list_bytes " + << buffer_list_bytes[BUFFER_HOT] + << " != actual " << hot_bytes + << dendl; + ceph_assert(hot_bytes == buffer_list_bytes[BUFFER_HOT]); + } + + for (auto i = buffer_warm_in.begin(); i != buffer_warm_in.end(); ++i) { + s += i->length; + } + + uint64_t warm_in_bytes = s - hot_bytes; + if (warm_in_bytes != buffer_list_bytes[BUFFER_WARM_IN]) { + derr << __func__ << " warm_in_list_bytes " + << buffer_list_bytes[BUFFER_WARM_IN] + << " != actual " << warm_in_bytes + << dendl; + ceph_assert(warm_in_bytes == buffer_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 + + +// BufferSpace + +#undef dout_prefix +#define dout_prefix *_dout << "bluestore.BufferSpace(" << this << " in " << cache << ") " + +void BlueStore::BufferSpace::_clear(Cache* 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(Cache* 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); + nb->maybe_rebuild(); + _add_buffer(cache, nb, 0, b); + } else { + _add_buffer(cache, new Buffer(this, b->state, b->seq, end, tail), + 0, b); + } + if (!b->is_writing()) { + cache->_adjust_buffer_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_buffer_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); + nb->maybe_rebuild(); + _add_buffer(cache, nb, 0, b); + } else { + _add_buffer(cache, new Buffer(this, b->state, b->seq, end, keep), 0, b); + } + _rm_buffer(cache, i); + cache->_audit("discard end 2"); + break; + } + return cache_private; +} + +void BlueStore::BufferSpace::read( + Cache* 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_buffer(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_buffer(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(Cache* 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_buffer(b, 1, nullptr); + ldout(cache->cct, 20) << __func__ << " added " << *b << dendl; + } + } + + cache->_audit("finish_write end"); +} + +void BlueStore::BufferSpace::split(Cache* 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), + 0, p->second.get()); + } else { + r._add_buffer(cache, new Buffer(&r, p->second->state, p->second->seq, 0, right), + 0, p->second.get()); + } + cache->_adjust_buffer_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), + 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), + 0, p->second.get()); + } + if (p == buffer_map.begin()) { + _rm_buffer(cache, p); + break; + } else { + _rm_buffer(cache, p--); + } + } + ceph_assert(writing.empty()); +} + +// 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, 30) << __func__ << " " << oid << " " << o << dendl; + onode_map[oid] = o; + cache->_add_onode(o, 1); + return o; +} + +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 + << dendl; + cache->_touch_onode(p->second); + hit = true; + o = p->second; + } + } + + 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__ << dendl; + for (auto &p : onode_map) { + cache->_rm_onode(p.second); + } + 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_onode(pn->second); + 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_onode(po->second, 1); + + // add at new position and fix oid, key + onode_map.insert(make_pair(new_oid, o)); + cache->_touch_onode(o); + o->oid = new_oid; + o->key = new_okey; +} + +bool BlueStore::OnodeSpace::map_any(std::function<bool(OnodeRef)> f) +{ + std::lock_guard l(cache->lock); + ldout(cache->cct, 20) << __func__ << dendl; + for (auto& i : onode_map) { + if (f(i.second)) { + 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 << dendl; + } +} + +// SharedBlob + +#undef dout_prefix +#define dout_prefix *_dout << "bluestore.sharedblob(" << this << ") " + +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) { + ldout(coll->store->cct, 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) { + Cache *cache = coll->cache; + std::lock_guard l(cache->lock); + if (coll->cache != cache) { + ldout(coll->store->cct, 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 << ") " + +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()) { + ldout(coll->store->cct, 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()); + auto cct = coll->store->cct; //used by dout + 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); + auto cct = coll->store->cct; + 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; + + auto cct = coll->store->cct; + 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) +{ + auto cct = coll->store->cct; //used by dout + 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 + +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 << ") " + +BlueStore::ExtentMap::ExtentMap(Onode *o) + : onode(o), + inline_bl( + o->c->store->cct->_conf->bluestore_extent_map_inline_shard_prealloc_size) { +} + +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->cache->dumped_onodes; + decltype(onode->c->cache->dumped_onodes)::value_type* oid_slot = nullptr; + decltype(onode->c->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) +{ + auto cct = onode->c->store->cct; //used by dout + 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) +{ + auto cct = onode->c->store->cct; //used by dout + /* + 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) +{ + auto cct = onode->c->store->cct; //used by dout + 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) +{ + auto cct = onode->c->store->cct; //used by dout + 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) +{ + auto cct = onode->c->store->cct; //used by dout + 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) +{ + auto cct = onode->c->store->cct; //used by dout + + 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__ << " " + +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; + std::unique_lock l(flush_lock); + while (flushing_count.load()) { + flush_cond.wait(l); + } + } + ldout(c->store->cct, 20) << __func__ << " done" << dendl; +} + +// ======================================================= +// 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 << ") " + +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_, Cache *c, coll_t cid) + : CollectionImpl(cid), + store(store_), + cache(c), + lock("BlueStore::Collection::lock", true, false), + exists(true), + onode_map(c), + 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) +{ + ceph_assert(create ? lock.is_wlocked() : lock.is_locked()); + + 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 = store->db->get(PREFIX_OBJ, key.c_str(), key.size(), &v); + ldout(store->cct, 20) << " r " << r << " v.len " << v.length() << dendl; + Onode *on; + if (v.length() == 0) { + ceph_assert(r == -ENOENT); + if (!store->cct->_conf->bluestore_debug_misc && + !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; + + // lock (one or both) cache shards + std::lock(cache->lock, dest->cache->lock); + std::lock_guard l(cache->lock, std::adopt_lock); + std::lock_guard l2(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; + + cache->_rm_onode(p->second); + p = onode_map.onode_map.erase(p); + + o->c = dest; + dest->cache->_add_onode(o, 1); + dest->onode_map.onode_map[o->oid] = o; + dest->onode_map.cache = dest->cache; + + // 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_buffer(cache, i.second.get()); + } + } + } + } + } + } +} + +// ======================================================= + +// MempoolThread + +#undef dout_prefix +#define dout_prefix *_dout << "bluestore.MempoolThread(" << this << ") " + +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(); + if (store->cache_autotune && binned_kv_cache != nullptr) { + pcm = std::make_shared<PriorityCache::Manager>( + store->cct, min, max, target, true); + pcm->insert("kv", binned_kv_cache, true); + pcm->insert("meta", meta_cache, true); + pcm->insert("data", data_cache, true); + } + + utime_t next_balance = ceph_clock_now(); + utime_t next_resize = 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; + + 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; + } + + // Now Trim + _trim_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); + } + stop = false; + return NULL; +} + +void BlueStore::MempoolThread::_adjust_cache_settings() +{ + if (binned_kv_cache != nullptr) { + binned_kv_cache->set_cache_ratio(store->cache_kv_ratio); + } + meta_cache->set_cache_ratio(store->cache_meta_ratio); + data_cache->set_cache_ratio(store->cache_data_ratio); +} + +void BlueStore::MempoolThread::_trim_shards(bool interval_stats) +{ + auto cct = store->cct; + size_t num_shards = store->cache_shards.size(); + + int64_t kv_used = store->db->get_cache_usage(); + 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 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 (interval_stats) { + ldout(cct, 5) << __func__ << " cache_size: " << cache_size + << " kv_alloc: " << kv_alloc + << " kv_used: " << kv_used + << " meta_alloc: " << meta_alloc + << " meta_used: " << meta_used + << " data_alloc: " << data_alloc + << " data_used: " << data_used << dendl; + } else { + ldout(cct, 20) << __func__ << " cache_size: " << cache_size + << " kv_alloc: " << kv_alloc + << " kv_used: " << kv_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) num_shards) / meta_cache->get_bytes_per_onode()); + uint64_t max_shard_buffer = static_cast<uint64_t>(data_alloc / num_shards); + + auto debug_max_onodes = g_conf()->bluestore_debug_max_cached_onodes; + if (debug_max_onodes) { + max_shard_onodes = debug_max_onodes; + } + ldout(cct, 30) << __func__ << " max_shard_onodes: " << max_shard_onodes + << " max_shard_buffer: " << max_shard_buffer << dendl; + + for (auto i : store->cache_shards) { + i->trim(max_shard_onodes, max_shard_buffer); + } +} + +void BlueStore::MempoolThread::_update_cache_settings() +{ + // Nothing to do if pcm is not used. + if (pcm == nullptr) { + return; + } + + auto cct = store->cct; + 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); + + ldout(cct, 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) +{ + RWLock::RLocker l(c->lock); + if (o->onode.has_omap()) { + get_omap_key(o->onode.nid, string(), &head); + get_omap_tail(o->onode.nid, &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() +{ + RWLock::RLocker 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) +{ + RWLock::RLocker l(c->lock); + auto start1 = mono_clock::now(); + if (o->onode.has_omap()) { + string key; + get_omap_key(o->onode.nid, 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) +{ + RWLock::RLocker l(c->lock); + auto start1 = mono_clock::now(); + if (o->onode.has_omap()) { + string key; + get_omap_key(o->onode.nid, 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() +{ + RWLock::RLocker 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; + RWLock::RLocker 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() +{ + RWLock::RLocker l(c->lock); + ceph_assert(it->valid()); + string db_key = it->raw_key().second; + string user_key; + decode_omap_key(db_key, &user_key); + + return user_key; +} + +bufferlist BlueStore::OmapIteratorImpl::value() +{ + RWLock::RLocker l(c->lock); + ceph_assert(it->valid()); + return it->value(); +} + + +// ===================================== + +#undef dout_prefix +#define dout_prefix *_dout << "bluestore(" << path << ") " + + +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(alloc); + alloc->release(to_release); +} + +BlueStore::BlueStore(CephContext *cct, const string& path) + : ObjectStore(cct, path), + throttle_bytes(cct, "bluestore_throttle_bytes", + cct->_conf->bluestore_throttle_bytes), + throttle_deferred_bytes(cct, "bluestore_throttle_deferred_bytes", + cct->_conf->bluestore_throttle_bytes + + cct->_conf->bluestore_throttle_deferred_bytes), + deferred_finisher(cct, "defered_finisher", "dfin"), + finisher(cct, "commit_finisher", "cfin"), + kv_sync_thread(this), + kv_finalize_thread(this), + mempool_thread(this) +{ + _init_logger(); + cct->_conf.add_observer(this); + set_cache_shards(1); +} + +BlueStore::BlueStore(CephContext *cct, + const string& path, + uint64_t _min_alloc_size) + : ObjectStore(cct, path), + throttle_bytes(cct, "bluestore_throttle_bytes", + cct->_conf->bluestore_throttle_bytes), + throttle_deferred_bytes(cct, "bluestore_throttle_deferred_bytes", + cct->_conf->bluestore_throttle_bytes + + cct->_conf->bluestore_throttle_deferred_bytes), + deferred_finisher(cct, "defered_finisher", "dfin"), + finisher(cct, "commit_finisher", "cfin"), + kv_sync_thread(this), + kv_finalize_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 : cache_shards) { + delete i; + } + 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", + 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_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")) { + throttle_bytes.reset_max(conf->bluestore_throttle_bytes); + throttle_deferred_bytes.reset_max( + conf->bluestore_throttle_bytes + conf->bluestore_throttle_deferred_bytes); + } + if (changed.count("bluestore_throttle_deferred_bytes")) { + throttle_deferred_bytes.reset_max( + conf->bluestore_throttle_bytes + conf->bluestore_throttle_deferred_bytes); + } + 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 (bdev->is_rotational()) { + 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 (bdev->is_rotational()) { + 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 (bdev->is_rotational()) { + 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 (bdev->is_rotational()) { + 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 (bdev->is_rotational()) { + cache_size = cct->_conf->bluestore_cache_size_hdd; + } else { + cache_size = cct->_conf->bluestore_cache_size_ssd; + } + } + + cache_meta_ratio = cct->_conf->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->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; + } + + 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; + 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_counter(l_bluestore_onode_hits, "bluestore_onode_hits", + "Sum for onode-lookups hit in the cache"); + b.add_u64_counter(l_bluestore_onode_misses, "bluestore_onode_misses", + "Sum for onode-lookups missed in the cache"); + b.add_u64_counter(l_bluestore_onode_shard_hits, "bluestore_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_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_small_deferred, + "bluestore_write_small_deferred", + "Small overwrites using deferred"); + 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_small_new, "bluestore_write_small_new", + "Small write into new (sparse) 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) + auto osd_max_object_size = + cct->_conf.get_val<Option::size_t>("osd_max_object_size"); + if (osd_max_object_size >= (size_t)OBJECT_MAX_SIZE) { + derr << __func__ << " osd_max_object_size >= 0x" << std::hex << OBJECT_MAX_SIZE + << "; BlueStore has hard limit of 0x" << OBJECT_MAX_SIZE << "." << std::dec << dendl; + return -EINVAL; + } + 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)); + if (fd < 0) { + fd = -errno; + derr << __func__ << " failed to open " << path << ": " << cpp_strerror(fd) + << dendl; + return fd; + } + 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 (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 (bdev->is_rotational()) { + 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 (bdev->is_rotational()) { + 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); + // and set cache_size based on device type + r = _set_cache_sizes(); + if (r < 0) { + goto fail_close; + } + return 0; + + fail_close: + bdev->close(); + fail: + delete bdev; + bdev = NULL; + return r; +} + +void BlueStore::_validate_bdev() +{ + ceph_assert(bdev); + ceph_assert(min_alloc_size); // _get_odisk_reserved depends on that + uint64_t dev_size = bdev->get_size(); + if (dev_size < + _get_ondisk_reserved() + cct->_conf->bluestore_bluefs_min) { + dout(1) << __func__ << " main device size " << byte_u_t(dev_size) + << " is too small, disable bluestore_bluefs_min for now" + << dendl; + ceph_assert(dev_size >= _get_ondisk_reserved()); + + int r = cct->_conf.set_val("bluestore_bluefs_min", "0"); + ceph_assert(r == 0); + } +} + +void BlueStore::_close_bdev() +{ + ceph_assert(bdev); + bdev->close(); + delete bdev; + bdev = NULL; +} + +int BlueStore::_open_fm(KeyValueDB::Transaction t) +{ + 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); + fm->create(bdev->get_size(), (int64_t)min_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_extents. + auto reserved = _get_ondisk_reserved(); + fm->allocate(0, reserved, t); + + if (cct->_conf->bluestore_bluefs) { + ceph_assert(bluefs_extents.num_intervals() == 1); + interval_set<uint64_t>::iterator p = bluefs_extents.begin(); + reserved = round_up_to(p.get_start() + p.get_len(), min_alloc_size); + dout(20) << __func__ << " reserved 0x" << std::hex << reserved << std::dec + << " for bluefs" << dendl; + } + + 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; + } + } + } + + int r = fm->init(db); + 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::_open_alloc() +{ + ceph_assert(alloc == NULL); + ceph_assert(bdev->get_size()); + + if (bluefs) { + bluefs_extents.clear(); + auto r = bluefs->get_block_extents(bluefs_shared_bdev, &bluefs_extents); + if (r < 0) { + lderr(cct) << __func__ << " failed to retrieve bluefs_extents: " + << cpp_strerror(r) << dendl; + + return r; + } + dout(10) << __func__ << " bluefs extents 0x" + << std::hex << bluefs_extents << std::dec + << dendl; + } + + alloc = Allocator::create(cct, cct->_conf->bluestore_allocator, + bdev->get_size(), + min_alloc_size, "block"); + if (!alloc) { + lderr(cct) << __func__ << " Allocator::unknown alloc type " + << cct->_conf->bluestore_allocator + << dendl; + return -EINVAL; + } + + 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)) { + alloc->init_add_free(offset, length); + ++num; + bytes += length; + } + fm->enumerate_reset(); + + // also mark bluefs space as allocated + for (auto e = bluefs_extents.begin(); e != bluefs_extents.end(); ++e) { + alloc->init_rm_free(e.get_start(), e.get_len()); + } + + dout(1) << __func__ << " loaded " << byte_u_t(bytes) + << " in " << num << " extents" + << " available " << byte_u_t(alloc->get_free()) + << dendl; + + return 0; +} + +void BlueStore::_close_alloc() +{ + ceph_assert(bdev); + bdev->discard_drain(); + + ceph_assert(alloc); + alloc->shutdown(); + delete alloc; + alloc = NULL; + bluefs_extents.clear(); +} + +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::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); + 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; + } + } + if (create) { + bluefs->add_block_extent( + BlueFS::BDEV_DB, + SUPER_RESERVED, + bluefs->get_block_device_size(BlueFS::BDEV_DB) - SUPER_RESERVED); + } + bluefs_shared_bdev = BlueFS::BDEV_SLOW; + bluefs_single_shared_device = false; + } else { + r = -errno; + if (::lstat(bfn.c_str(), &st) == -1) { + r = 0; + bluefs_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_shared_bdev, bfn, false, + true /* shared with bluestore */); + if (r < 0) { + derr << __func__ << " add block device(" << bfn << ") returned: " + << cpp_strerror(r) << dendl; + goto free_bluefs; + } + if (create) { + // note: we always leave the first SUPER_RESERVED (8k) of the device unused + uint64_t initial = + bdev->get_size() * (cct->_conf->bluestore_bluefs_min_ratio + + cct->_conf->bluestore_bluefs_gift_ratio); + initial = std::max(initial, cct->_conf->bluestore_bluefs_min); + uint64_t alloc_size = cct->_conf->bluefs_shared_alloc_size; + if (alloc_size % min_alloc_size) { + derr << __func__ << " bluefs_shared_alloc_size 0x" << std::hex + << alloc_size << " is not a multiple of " + << "min_alloc_size 0x" << min_alloc_size << std::dec << dendl; + r = -EINVAL; + goto free_bluefs; + } + // align to bluefs's alloc_size + initial = p2roundup(initial, alloc_size); + // put bluefs in the middle of the device in case it is an HDD + uint64_t start = p2align((bdev->get_size() - initial) / 2, alloc_size); + //avoiding superblock overwrite + start = std::max(alloc_size, start); + ceph_assert(start >=_get_ondisk_reserved()); + + bluefs->add_block_extent(bluefs_shared_bdev, start, initial); + bluefs_extents.insert(start, initial); + ++out_of_sync_fm; + } + + 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); + 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; + } + } + + if (create) { + bluefs->add_block_extent( + BlueFS::BDEV_WAL, BDEV_LABEL_BLOCK_SIZE, + bluefs->get_block_device_size(BlueFS::BDEV_WAL) - + BDEV_LABEL_BLOCK_SIZE); + } + bluefs_single_shared_device = false; + } 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) +{ + int r = _minimal_open_bluefs(create); + if (r < 0) { + return r; + } + RocksDBBlueFSVolumeSelector* vselector = nullptr; + if (bluefs_shared_bdev == BlueFS::BDEV_SLOW) { + + string options = cct->_conf->bluestore_rocksdb_options; + + rocksdb::Options rocks_opts; + int r = RocksDBStore::ParseOptionsFromStringStatic( + cct, + options, + rocks_opts, + nullptr); + if (r < 0) { + return r; + } + + 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 != "rocksdb_original"); + } + if (create) { + bluefs->mkfs(fsid); + } + bluefs->set_volume_selector(vselector); + r = bluefs->mount(); + if (r < 0) { + derr << __func__ << " failed bluefs mount: " << cpp_strerror(r) << dendl; + } + 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) +{ + int r; + bool do_bluefs = false; + _is_bluefs(false, &do_bluefs); // ignore err code + if (do_bluefs) { + // 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) + return r; + + r = _open_super_meta(); + if (r < 0) { + goto out_db; + } + + r = _open_fm(nullptr); + if (r < 0) + goto out_db; + + r = _open_alloc(); + if (r < 0) + goto out_fm; + + // now open in R/W mode + if (!read_only) { + _close_db(true); + + r = _open_db(false, false, false); + if (r < 0) { + _close_alloc(); + _close_fm(); + return r; + } + } + } else { + r = _open_db(false, false); + if (r < 0) { + return r; + } + r = _open_super_meta(); + if (r < 0) { + goto out_db; + } + + r = _open_fm(nullptr); + if (r < 0) + goto out_db; + + r = _open_alloc(); + if (r < 0) + goto out_fm; + } + return 0; + + out_fm: + _close_fm(); + out_db: + _close_db(read_only); + return r; +} + +void BlueStore::_close_db_and_around(bool read_only) +{ + if (bluefs) { + if (!read_only && out_of_sync_fm.fetch_and(0)) { + _sync_bluefs_and_fm(); + } + _close_db(read_only); + while(!read_only && out_of_sync_fm.fetch_and(0)) { + // if seen some allocations during close - repeat open_db, sync fm, close + dout(0) << __func__ << " syncing FreelistManager" << dendl; + int r = _open_db(false, false, false); + if (r < 0) { + derr << __func__ + << " unable to open db, FreelistManager is probably out of sync" + << dendl; + break; + } + _sync_bluefs_and_fm(); + _close_db(false); + } + if (!_kv_only) { + _close_alloc(); + _close_fm(); + } + } else { + _close_alloc(); + _close_fm(); + _close_db(read_only); + } +} + +// updates legacy bluefs related recs in DB to a state valid for +// downgrades from nautilus. +void BlueStore::_sync_bluefs_and_fm() +{ + if (cct->_conf->bluestore_bluefs_db_compatibility) { + bufferlist bl; + encode(bluefs_extents, bl); + dout(20) << __func__ << " bluefs_extents at KV is now 0x" + << std::hex << bluefs_extents << std::dec + << dendl; + KeyValueDB::Transaction synct = db->get_transaction(); + synct->set(PREFIX_SUPER, "bluefs_extents", bl); + synct->set(PREFIX_SUPER, "bluefs_extents_back", bl); + + // Nice thing is that we don't need to update FreelistManager here. + // It always has corresponding bits set to 'Free' for both Nautilus+ and + // pre-Nautilis releases. + // So once we get an extent to bluefs_extents this means it's + // been free in allocator and hence it's free in FM too. + + db->submit_transaction_sync(synct); + } +} + +int BlueStore::_open_db(bool create, bool to_repair_db, bool read_only) +{ + int r; + ceph_assert(!db); + ceph_assert(!(create && read_only)); + string fn = path + "/db"; + string options; + stringstream err; + std::shared_ptr<Int64ArrayMergeOperator> merge_op(new Int64ArrayMergeOperator); + + string kv_backend; + std::vector<KeyValueDB::ColumnFamily> cfs; + + 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); + 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"; + } + bluefs->set_slow_device_expander(this); + BlueFSVolumeSelector::paths paths; + bluefs->get_vselector_paths(fn, paths); + + if (bluefs_shared_bdev == BlueFS::BDEV_SLOW) { + // we have both block.db and block; tell rocksdb! + // note: the second (last) size value doesn't really matter + 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); + db->set_merge_operator(PREFIX_STAT, merge_op); + db->set_cache_size(cache_kv_ratio * cache_size); + + if (kv_backend == "rocksdb") { + options = cct->_conf->bluestore_rocksdb_options; + + map<string,string> cf_map; + cct->_conf.with_val<string>("bluestore_rocksdb_cfs", + get_str_map, + &cf_map, + " \t"); + for (auto& i : cf_map) { + dout(10) << "column family " << i.first << ": " << i.second << dendl; + cfs.push_back(KeyValueDB::ColumnFamily(i.first, i.second)); + } + } + + db->init(options); + if (to_repair_db) + return 0; + if (create) { + if (cct->_conf.get_val<bool>("bluestore_rocksdb_cf")) { + r = db->create_and_open(err, cfs); + } else { + r = db->create_and_open(err); + } + } 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, cfs) : + db->open(err, cfs); + } + if (r) { + derr << __func__ << " erroring opening db: " << err.str() << dendl; + _close_db(read_only); + return -EIO; + } + dout(1) << __func__ << " opened " << kv_backend + << " path " << 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()) { + alloc->dump(); + next_dump_on_bluefs_alloc_failure = ceph_clock_now(); + next_dump_on_bluefs_alloc_failure += dump_interval; + } +} + + +int BlueStore::allocate_bluefs_freespace( + uint64_t min_size, + uint64_t size, + PExtentVector* extents_out) +{ + ceph_assert(min_size <= size); + if (size) { + // round up to alloc size + uint64_t alloc_size = bluefs->get_alloc_size(bluefs_shared_bdev); + min_size = p2roundup(min_size, alloc_size); + size = p2roundup(size, alloc_size); + + PExtentVector extents_local; + PExtentVector* extents = extents_out ? extents_out : &extents_local; + + + uint64_t gift; + uint64_t allocated = 0; + int64_t alloc_len; + do { + // hard cap to fit into 32 bits + gift = std::min<uint64_t>(size, 1ull << 31); + dout(10) << __func__ << " gifting " << gift + << " (" << byte_u_t(gift) << ")" << dendl; + + alloc_len = alloc->allocate(gift, alloc_size, 0, 0, extents); + if (alloc_len > 0) { + allocated += alloc_len; + size -= alloc_len; + } + + if (alloc_len < 0 || + (alloc_len < (int64_t)gift && (min_size > allocated))) { + derr << __func__ + << " failed to allocate on 0x" << std::hex << gift + << " min_size 0x" << min_size + << " > allocated total 0x" << allocated + << " bluefs_shared_alloc_size 0x" << alloc_size + << " allocated 0x" << (alloc_len < 0 ? 0 : alloc_len) + << " available 0x " << alloc->get_free() + << std::dec << dendl; + + _dump_alloc_on_failure(); + alloc->release(*extents); + extents->clear(); + return -ENOSPC; + } + } while (size && alloc_len > 0); + for (auto& e : *extents) { + dout(5) << __func__ << " gifting " << e << " to bluefs" << dendl; + bluefs_extents.insert(e.offset, e.length); + ++out_of_sync_fm; + // apply to bluefs if not requested from outside + if (!extents_out) { + bluefs->add_block_extent(bluefs_shared_bdev, e.offset, e.length); + } + } + } + return 0; +} + +size_t BlueStore::available_freespace(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); + }; + alloc->dump(iterated_allocation); + return total; +} + +int64_t BlueStore::_get_bluefs_size_delta(uint64_t bluefs_free, uint64_t bluefs_total) +{ + float bluefs_free_ratio = (float)bluefs_free / (float)bluefs_total; + + uint64_t my_free = alloc->get_free(); + uint64_t total = bdev->get_size(); + float my_free_ratio = (float)my_free / (float)total; + + uint64_t total_free = bluefs_free + my_free; + + float bluefs_ratio = (float)bluefs_free / (float)total_free; + + dout(10) << __func__ + << " bluefs " << byte_u_t(bluefs_free) + << " free (" << bluefs_free_ratio + << ") bluestore " << byte_u_t(my_free) + << " free (" << my_free_ratio + << "), bluefs_ratio " << bluefs_ratio + << dendl; + + uint64_t gift = 0; + uint64_t reclaim = 0; + if (bluefs_ratio < cct->_conf->bluestore_bluefs_min_ratio) { + gift = cct->_conf->bluestore_bluefs_gift_ratio * total_free; + dout(10) << __func__ << " bluefs_ratio " << bluefs_ratio + << " < min_ratio " << cct->_conf->bluestore_bluefs_min_ratio + << ", should gift " << byte_u_t(gift) << dendl; + } else if (bluefs_ratio > cct->_conf->bluestore_bluefs_max_ratio) { + reclaim = cct->_conf->bluestore_bluefs_reclaim_ratio * total_free; + if (bluefs_total - reclaim < cct->_conf->bluestore_bluefs_min) + reclaim = bluefs_total - cct->_conf->bluestore_bluefs_min; + dout(10) << __func__ << " bluefs_ratio " << bluefs_ratio + << " > max_ratio " << cct->_conf->bluestore_bluefs_max_ratio + << ", should reclaim " << byte_u_t(reclaim) << dendl; + } + + // don't take over too much of the freespace + uint64_t free_cap = cct->_conf->bluestore_bluefs_max_ratio * total_free; + if (bluefs_total < cct->_conf->bluestore_bluefs_min && + cct->_conf->bluestore_bluefs_min < free_cap) { + uint64_t g = cct->_conf->bluestore_bluefs_min - bluefs_total; + dout(10) << __func__ << " bluefs_total " << bluefs_total + << " < min " << cct->_conf->bluestore_bluefs_min + << ", should gift " << byte_u_t(g) << dendl; + if (g > gift) + gift = g; + reclaim = 0; + } + uint64_t min_free = cct->_conf.get_val<Option::size_t>("bluestore_bluefs_min_free"); + if (bluefs_free < min_free && + min_free < free_cap) { + uint64_t g = min_free - bluefs_free; + dout(10) << __func__ << " bluefs_free " << bluefs_free + << " < min " << min_free + << ", should gift " << byte_u_t(g) << dendl; + if (g > gift) + gift = g; + reclaim = 0; + } + ceph_assert((int64_t)gift >= 0); + ceph_assert((int64_t)reclaim >= 0); + return gift > 0 ? (int64_t)gift : -(int64_t)reclaim; +} + +int BlueStore::_balance_bluefs_freespace() +{ + int ret = 0; + ceph_assert(bluefs); + + vector<pair<uint64_t,uint64_t>> bluefs_usage; // <free, total> ... + bluefs->get_usage(&bluefs_usage); + ceph_assert(bluefs_usage.size() > bluefs_shared_bdev); + + bool clear_alert = true; + if (bluefs_shared_bdev == BlueFS::BDEV_SLOW) { + auto& p = bluefs_usage[bluefs_shared_bdev]; + if (p.first != p.second) { + auto& db = bluefs_usage[BlueFS::BDEV_DB]; + ostringstream ss; + ss << "spilled over " << byte_u_t(p.second - p.first) + << " metadata from 'db' device (" << byte_u_t(db.second - db.first) + << " used of " << byte_u_t(db.second) << ") to slow device"; + _set_spillover_alert(ss.str()); + clear_alert = false; + } + } + if (clear_alert) { + _clear_spillover_alert(); + } + + // fixme: look at primary bdev only for now + int64_t delta = _get_bluefs_size_delta( + bluefs_usage[bluefs_shared_bdev].first, + bluefs_usage[bluefs_shared_bdev].second); + + // reclaim from bluefs? + if (delta < 0) { + // round up to alloc size + uint64_t alloc_size = bluefs->get_alloc_size(bluefs_shared_bdev); + auto reclaim = p2roundup(uint64_t(-delta), alloc_size); + + // hard cap to fit into 32 bits + reclaim = std::min<uint64_t>(reclaim, 1ull << 31); + dout(10) << __func__ << " reclaiming " << reclaim + << " (" << byte_u_t(reclaim) << ")" << dendl; + + while (reclaim > 0) { + // NOTE: this will block and do IO. + PExtentVector extents; + int r = bluefs->reclaim_blocks(bluefs_shared_bdev, reclaim, + &extents); + if (r < 0) { + derr << __func__ << " failed to reclaim space from bluefs" + << dendl; + break; + } + for (auto e : extents) { + ++out_of_sync_fm; + bluefs_extents.erase(e.offset, e.length); + bluefs_extents_reclaiming.insert(e.offset, e.length); + reclaim -= e.length; + } + } + + ret = 1; + } + + return ret; +} + +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())) { + CollectionRef c( + new Collection( + this, + cache_shards[cid.hash_to_shard(cache_shards.size())], + cid)); + bufferlist bl = it->value(); + auto p = bl.cbegin(); + try { + decode(c->cnode, p); + } catch (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); + 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::_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); + 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 (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; + + 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 (bdev->is_rotational()) { + 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 = _open_db(true); + if (r < 0) + goto out_close_bdev; + + { + KeyValueDB::Transaction t = db->get_transaction(); + r = _open_fm(t); + 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); + } + + 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; + } + } + + if (out_of_sync_fm.fetch_and(0)) { + _sync_bluefs_and_fm(); + } + + out_close_fm: + _close_fm(); + out_close_db: + _close_db(false); + 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::_mount_for_bluefs() +{ + int r = _open_path(); + ceph_assert(r == 0); + r = _open_fsid(false); + ceph_assert(r == 0); + r = _read_fsid(&fsid); + ceph_assert(r == 0); + r = _lock_fsid(); + ceph_assert(r == 0); + r = _open_bluefs(false); + ceph_assert(r == 0); + return r; +} + +void BlueStore::_umount_for_bluefs() +{ + _close_bluefs(false); + _close_fsid(); + _close_path(); +} + +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 = _mount_for_bluefs(); + + int reserved = 0; + 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); + 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); + } + + reserved = BDEV_LABEL_BLOCK_SIZE; + } 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); + 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); + } + reserved = SUPER_RESERVED; + } + + bluefs->umount(); + bluefs->mount(); + + bluefs->add_block_extent( + id, + reserved, + bluefs->get_block_device_size(id) - reserved, true); + + r = bluefs->prepare_new_device(id); + ceph_assert(r == 0); + + if (r < 0) { + derr << __func__ << " failed, " << cpp_strerror(r) << dendl; + } else { + dout(0) << __func__ << " success" << dendl; + } + + _umount_for_bluefs(); + 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 = _mount_for_bluefs(); + + // require bluestore_bluefs_min_free to be free at target device! + uint64_t used_space = cct->_conf.get_val<Option::size_t>("bluestore_bluefs_min_free"); + for(auto src_id : devs_source) { + used_space += bluefs->get_total(src_id) - bluefs->get_free(src_id); + } + uint64_t target_free = bluefs->get_free(id); + if (id == BlueFS::BDEV_SLOW && target_free < used_space) { + // will need to remount full BlueStore instance to allocate more space + _umount_for_bluefs(); + + r = mount(); + ceph_assert(r == 0); + dout(1) << __func__ + << " Allocating more space at slow device for BlueFS: +" + << used_space - target_free << " bytes" << dendl; + r = allocate_bluefs_freespace( + used_space - target_free, + used_space - target_free, + nullptr); + + umount(); + if (r != 0) { + derr << __func__ + << " can't migrate, unable to allocate extra space: " + << used_space - target_free << " at target:" << id + << dendl; + return -ENOSPC; + } + + r = _mount_for_bluefs(); + ceph_assert(r == 0); + } else if (target_free < used_space) { + derr << __func__ + << " can't migrate, free space at target: " << target_free + << " is less than required space: " << used_space + << dendl; + return -ENOSPC; + } + r = bluefs->device_migrate_to_existing(cct, devs_source, id); + 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: + _umount_for_bluefs(); + 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 = _mount_for_bluefs(); + + int reserved = 0; + string link_db; + string link_wal; + if (devs_source.count(BlueFS::BDEV_DB) && + bluefs_shared_bdev != BlueFS::BDEV_DB) { + link_db = path + "/block.db"; + } + if (devs_source.count(BlueFS::BDEV_WAL)) { + link_wal = path + "/block.wal"; + } + + size_t target_size; + string target_name; + if (id == BlueFS::BDEV_NEWWAL) { + target_name = "block.wal"; + target_size = cct->_conf->bluestore_block_wal_size; + + r = bluefs->add_block_device(BlueFS::BDEV_NEWWAL, dev_path, + cct->_conf->bdev_enable_discard); + 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); + } + reserved = BDEV_LABEL_BLOCK_SIZE; + } else if (id == BlueFS::BDEV_NEWDB) { + target_name = "block.db"; + target_size = cct->_conf->bluestore_block_db_size; + + r = bluefs->add_block_device(BlueFS::BDEV_NEWDB, dev_path, + cct->_conf->bdev_enable_discard); + 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); + } + reserved = SUPER_RESERVED; + } + + bluefs->umount(); + bluefs->mount(); + + bluefs->add_block_extent( + id, reserved, bluefs->get_block_device_size(id) - reserved); + + r = bluefs->device_migrate_to_new(cct, devs_source, id); + + 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: + _umount_for_bluefs(); + 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_shared_bdev) { + res = path + "/block"; + } else { + res = path + "/block.db"; + } + break; + case BlueFS::BDEV_SLOW: + res = path + "/block"; + break; + } + } + return res; +} + +int BlueStore::expand_devices(ostream& out) +{ + int r = cold_open(); + 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_shared_bdev ) { + continue; + } + uint64_t size = bluefs->get_block_device_size(devid); + if (size == 0) { + // no bdev + continue; + } + + interval_set<uint64_t> before; + bluefs->get_block_extents(devid, &before); + ceph_assert(!before.empty()); + uint64_t end = before.range_end(); + if (end < size) { + out << devid + <<" : expanding " << " from 0x" << std::hex + << end << " to 0x" << size << std::dec << std::endl; + bluefs->add_block_extent(devid, end, size-end); + string p = get_device_path(devid); + const char* path = p.c_str(); + if (path == nullptr) { + derr << devid + <<": can't find device path " << dendl; + continue; + } + 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; + continue; + } + label.size = size; + r = _write_bdev_label(cct, path, label); + if (r < 0) { + derr << "unable to write label for " << path << ": " + << cpp_strerror(r) << dendl; + continue; + } + out << devid + <<" : size label updated to " << size + << std::endl; + } + } + uint64_t size0 = fm->get_size(); + uint64_t size = bdev->get_size(); + cold_close(); + if (size0 < size) { + out << "Expanding Main..." << std::endl; + int r = _mount(false); + ceph_assert(r == 0); + + out << bluefs_shared_bdev + <<" : expanding " << " from 0x" << std::hex + << size0 << " to 0x" << size << std::dec << std::endl; + KeyValueDB::Transaction txn; + txn = db->get_transaction(); + r = fm->expand(size, txn); + ceph_assert(r == 0); + db->submit_transaction_sync(txn); + + // always reference to slow device here + string p = get_device_path(BlueFS::BDEV_SLOW); + ceph_assert(!p.empty()); + const char* path = p.c_str(); + bluestore_bdev_label_t label; + 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; + } else { + out << bluefs_shared_bdev + <<" : size label updated to " << size + << std::endl; + } + } + umount(); + } + return r; +} + +int BlueStore::dump_bluefs_sizes(ostream& out) +{ + int r = cold_open(); + ceph_assert(r == 0); + bluefs->dump_block_extents(out); + cold_close(); + return r; +} + +void BlueStore::set_cache_shards(unsigned num) +{ + dout(10) << __func__ << " " << num << dendl; + size_t old = cache_shards.size(); + ceph_assert(num >= old); + cache_shards.resize(num); + for (unsigned i = old; i < num; ++i) { + cache_shards[i] = Cache::create(cct, cct->_conf->bluestore_cache_type, + logger); + } +} + +int BlueStore::_mount(bool kv_only, bool open_db) +{ + dout(1) << __func__ << " path " << path << dendl; + + _kv_only = kv_only; + + { + 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; + } + } + + 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_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; + + if (open_db) { + r = _open_db_and_around(false); + } else { + // we can bypass db open exclusively in case of kv_only mode + ceph_assert(kv_only); + r = _open_db(false, true); + if (r < 0) + goto out_bdev; + } + + if (kv_only) + return 0; + + 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(); + + r = _deferred_replay(); + if (r < 0) + goto out_stop; + + mempool_thread.init(); + + if (!per_pool_stat_collection && + cct->_conf->bluestore_fsck_quick_fix_on_mount == true) { + 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(); + } + + mounted = true; + return 0; + + out_stop: + _kv_stop(); + out_coll: + _flush_cache(); + out_db: + _close_db_and_around(false); + out_bdev: + _close_bdev(); + out_fsid: + _close_fsid(); + out_path: + _close_path(); + 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(); + dout(20) << __func__ << " stopping kv thread" << dendl; + _kv_stop(); + _flush_cache(); + dout(20) << __func__ << " closing" << dendl; + + } + _close_db_and_around(false); + _close_bdev(); + _close_fsid(); + _close_path(); + + 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() +{ + 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; + r = _open_db_and_around(true); + if (r < 0) { + goto out_bdev; + } + return 0; + out_bdev: + _close_bdev(); + out_fsid: + _close_fsid(); + out_path: + _close_path(); + return r; +} +int BlueStore::cold_close() +{ + _close_db_and_around(true); + _close_bdev(); + _close_fsid(); + _close_path(); + return 0; +} + +static void apply(uint64_t off, + uint64_t len, + uint64_t granularity, + BlueStore::mempool_dynamic_bitset &bitset, + std::function<void(uint64_t, + BlueStore::mempool_dynamic_bitset &)> f) { + auto end = round_up_to(off + len, granularity); + while (off < end) { + uint64_t pos = off / granularity; + f(pos, bitset); + off += granularity; + } +} + +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( + const coll_t& cid, + const ghobject_t& oid, + 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__ << " oid " << oid << " 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( + e.offset, e.length, granularity, used_blocks, + [&](uint64_t pos, mempool_dynamic_bitset &bs) { + ceph_assert(pos < bs.size()); + if (bs.test(pos)) { + if (repairer) { + repairer->note_misreference( + pos * min_alloc_size, min_alloc_size, !already); + } + if (!already) { + derr << "fsck error: " << oid << " extent " << e + << " or a subset is already allocated (misreferenced)" << dendl; + ++errors; + already = true; + } + } + else + bs.set(pos); + }); + if (repairer) { + repairer->get_space_usage_tracker().set_used( e.offset, e.length, cid, oid); + } + + if (e.end() > bdev->get_size()) { + derr << "fsck error: " << oid << " 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); + 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 (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_SHARED_BLOB, 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 && + cct->_conf->bluestore_fsck_error_on_no_per_pool_stats && + repairer) { + // by virtue of running this method, we correct the top-level + // error of having global stats + repairer->inc_repaired(); + } +} + +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 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) { + 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 (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(); + } + sb_info_t& sbi = sb_info[i.first->shared_blob->get_sbid()]; + ceph_assert(sbi.cid == coll_t() || sbi.cid == c->cid); + ceph_assert(sbi.pool_id == INT64_MIN || + sbi.pool_id == oid.hobj.get_logical_pool()); + sbi.cid = c->cid; + sbi.pool_id = oid.hobj.get_logical_pool(); + sbi.sb = i.first->shared_blob; + sbi.oids.push_back(oid); + sbi.compressed = blob.is_compressed(); + for (auto e : blob.get_extents()) { + if (e.is_valid()) { + sbi.ref_map.get(e.offset, e.length); + } + } + if (sb_info_lock) { + sb_info_lock->unlock(); + } + } else if (depth != FSCK_SHALLOW) { + ceph_assert(used_blocks); + errors += _fsck_check_extents(c->cid, oid, 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) { + auto txn = repairer->fix_spanning_blobs(db); + _record_onode(o, txn); + } + } + } + + 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; + + mempool::bluestore_fsck::list<string>* expecting_shards = nullptr; + ceph::mutex* sb_info_lock = nullptr; + BlueStore::sb_info_map_t* sb_info = 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, + mempool::bluestore_fsck::list<string>& _expecting_shards, + ceph::mutex* _sb_info_lock, + BlueStore::sb_info_map_t& _sb_info, + BlueStoreRepairer* _repairer) : + WorkQueue_(n, time_t(), time_t()), + batchCount(_batchCount), + store(_store), + expecting_shards(&_expecting_shards), + sb_info_lock(_sb_info_lock), + sb_info(&_sb_info), + 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; + nullptr, // used_per_pool_omap_head; + nullptr, // used_pgmeta_omap_head; + sb_info_lock, + *sb_info, + 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, + *expecting_shards, + 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_objects(FSCKDepth depth, + BlueStore::FSCK_ObjectCtx& ctx) +{ + //no need for the below lock when in non-shallow mode as + // there is no multithreading in this case + if (depth != FSCK_SHALLOW) { + ctx.sb_info_lock = nullptr; + } + + auto& errors = ctx.errors; + auto used_omap_head = ctx.used_omap_head; + auto used_pgmeta_omap_head = ctx.used_pgmeta_omap_head; + auto sb_info_lock = ctx.sb_info_lock; + auto& sb_info = ctx.sb_info; + auto repairer = ctx.repairer; + + uint64_t_btree_t used_nids; + + size_t processed_myself = 0; + + auto it = db->get_iterator(PREFIX_OBJ); + 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, + expecting_shards, + sb_info_lock, + sb_info, + 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(used_omap_head); + ceph_assert(used_pgmeta_omap_head); + auto m = + o->onode.is_pgmeta_omap() ? used_pgmeta_omap_head : used_omap_head; + if (m->count(o->onode.nid)) { + derr << "fsck error: " << oid << " omap_head " << o->onode.nid + << " already in use" << dendl; + ++errors; + } else { + m->insert(o->onode.nid); + } + } + 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_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; + + r = _open_db_and_around(read_only); + if (r < 0) + goto out_bdev; + + 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(); + _flush_cache(); +out_db: + _close_db_and_around(false); +out_bdev: + _close_bdev(); +out_fsid: + _close_fsid(); +out_path: + _close_path(); + + return r; +} + +int BlueStore::_fsck_on_open(BlueStore::FSCKDepth depth, bool repair) +{ + dout(1) << __func__ + << " <<<START>>>" + << (repair ? " repair" : " check") + << (depth == FSCK_DEEP ? " (deep)" : + depth == FSCK_SHALLOW ? " (shallow)" : " (regular)") + << " start" << dendl; + int64_t errors = 0; + int64_t warnings = 0; + unsigned repaired = 0; + + uint64_t_btree_t used_omap_head; + uint64_t_btree_t used_per_pool_omap_head; + uint64_t_btree_t used_pgmeta_omap_head; + uint64_t_btree_t used_sbids; + + mempool_dynamic_bitset used_blocks; + KeyValueDB::Iterator it; + store_statfs_t expected_store_statfs, actual_statfs; + per_pool_statfs expected_pool_statfs; + + sb_info_map_t sb_info; + + 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; + + utime_t start = ceph_clock_now(); + + _fsck_collections(&errors); + used_blocks.resize(fm->get_alloc_units()); + apply( + 0, std::max<uint64_t>(min_alloc_size, SUPER_RESERVED), fm->get_alloc_size(), used_blocks, + [&](uint64_t pos, mempool_dynamic_bitset &bs) { + ceph_assert(pos < bs.size()); + bs.set(pos); + } + ); + if (repair) { + repairer.get_space_usage_tracker().init( + bdev->get_size(), + min_alloc_size); + } + + if (bluefs) { + if( cct->_conf->bluestore_bluefs_db_compatibility) { + interval_set<uint64_t> bluefs_extents_db; + bufferlist bl; + db->get(PREFIX_SUPER, "bluefs_extents", &bl); + auto p = bl.cbegin(); + auto prev_errors = errors; + try { + decode(bluefs_extents_db, p); + bluefs_extents_db.union_of(bluefs_extents); + bluefs_extents_db.subtract(bluefs_extents); + if (!bluefs_extents_db.empty()) { + derr << "fsck error: bluefs_extents inconsistency, " + << "downgrade to previous releases might be broken." + << dendl; + ++errors; + } + } + catch (buffer::error& e) { + derr << "fsck error: failed to retrieve bluefs_extents from kv" << dendl; + ++errors; + } + if (errors != prev_errors && repair) { + repairer.fix_bluefs_extents(out_of_sync_fm); + } + } + + for (auto e = bluefs_extents.begin(); e != bluefs_extents.end(); ++e) { + apply( + e.get_start(), e.get_len(), fm->get_alloc_size(), used_blocks, + [&](uint64_t pos, mempool_dynamic_bitset &bs) { + ceph_assert(pos < bs.size()); + bs.set(pos); + }); + } + 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; + } + // 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; + } + // 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, + nullptr, + &used_pgmeta_omap_head, + &sb_info_lock, + sb_info, + expected_store_statfs, + expected_pool_statfs, + repair ? &repairer : nullptr); + _fsck_check_objects(depth, + ctx); + } + + dout(1) << __func__ << " checking shared_blobs" << dendl; + it = db->get_iterator(PREFIX_SHARED_BLOB); + 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()) { + derr << "fsck error: found stray shared blob data for sbid 0x" + << std::hex << sbid << std::dec << dendl; + if (repair) { + repairer.remove_key(db, PREFIX_SHARED_BLOB, key); + } + ++errors; + } else { + ++num_shared_blobs; + sb_info_t& sbi = p->second; + bluestore_shared_blob_t shared_blob(sbid); + bufferlist bl = it->value(); + auto blp = bl.cbegin(); + try { + decode(shared_blob, blp); + } catch (buffer::error& e) { + ++errors; + // Force update and don't report as missing + sbi.updated = sbi.passed = true; + + derr << "fsck error: failed to decode Shared Blob" + << pretty_binary_string(it->key()) << dendl; + if (repair) { + dout(20) << __func__ << " undecodable Shared Blob, key:'" + << pretty_binary_string(it->key()) + << "', removing" << dendl; + repairer.remove_key(db, PREFIX_DEFERRED, it->key()); + } + continue; + } + dout(20) << __func__ << " " << *sbi.sb << " " << shared_blob << dendl; + if (shared_blob.ref_map != sbi.ref_map) { + derr << "fsck error: shared blob 0x" << std::hex << sbid + << std::dec << " ref_map " << shared_blob.ref_map + << " != expected " << sbi.ref_map << dendl; + sbi.updated = true; // will update later in repair mode only! + ++errors; + } + PExtentVector extents; + for (auto &r : shared_blob.ref_map.ref_map) { + extents.emplace_back(bluestore_pextent_t(r.first, r.second.length)); + } + if (per_pool_stat_collection || repair) { + expected_statfs = &expected_pool_statfs[sbi.pool_id]; + } + errors += _fsck_check_extents(sbi.cid, + p->second.oids.front(), + extents, + p->second.compressed, + used_blocks, + fm->get_alloc_size(), + repair ? &repairer : nullptr, + *expected_statfs, + depth); + sbi.passed = true; + } + } + } // if (it) + + if (repair && repairer.preprocess_misreference(db)) { + + dout(1) << __func__ << " sorting out misreferenced extents" << dendl; + auto& space_tracker = repairer.get_space_usage_tracker(); + auto& misref_extents = repairer.get_misreferences(); + interval_set<uint64_t> to_release; + it = db->get_iterator(PREFIX_OBJ); + 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 || !space_tracker.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 (!space_tracker.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(); + b_off += e->length, e++) { + if (!e->is_valid()) { + continue; + } + PExtentVector exts; + int64_t alloc_len = alloc->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 " << alloc->get_free() + << std::dec << dendl; + if (alloc_len > 0) { + alloc->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, 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 sb_it = sb_info.find(b->shared_blob->get_sbid()); + ceph_assert(sb_it != sb_info.end()); + sb_info_t& sbi = sb_it->second; + + for (auto& r : sbi.ref_map.ref_map) { + expected_statfs->allocated -= r.second.length; + if (sbi.compressed) { + // NB: it's crucial to use compressed flag from sb_info_t + // as we originally used that value while accumulating + // expected_statfs + expected_statfs->data_compressed_allocated -= r.second.length; + } + } + sbi.updated = sbi.passed = true; + sbi.ref_map.clear(); + + // 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); + } + alloc->release(to_release); + to_release.clear(); + } // if (it) { + } //if (repair && repairer.preprocess_misreference()) { + + if (depth != FSCK_SHALLOW) { + for (auto &p : sb_info) { + sb_info_t& sbi = p.second; + if (!sbi.passed) { + derr << "fsck error: missing " << *sbi.sb << dendl; + ++errors; + } + if (repair && (!sbi.passed || sbi.updated)) { + auto sbid = p.first; + if (sbi.ref_map.empty()) { + ceph_assert(sbi.passed); + dout(20) << __func__ << " " << *sbi.sb + << " is empty, removing" << dendl; + repairer.fix_shared_blob(db, sbid, nullptr); + } else { + bufferlist bl; + bluestore_shared_blob_t persistent(sbid, std::move(sbi.ref_map)); + encode(persistent, bl); + dout(20) << __func__ << " " << *sbi.sb + << " is " << bl.length() << " bytes, updating" << dendl; + + repairer.fix_shared_blob(db, sbid, &bl); + } + } + } + } + sb_info.clear(); + + // 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); + if (it) { + 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) { + derr << "fsck error: found stray omap data on omap_head " + << omap_head << dendl; + ++errors; + } + } + } + it = db->get_iterator(PREFIX_PGMETA_OMAP); + if (it) { + for (it->lower_bound(string()); it->valid(); it->next()) { + uint64_t omap_head; + _key_decode_u64(it->key().c_str(), &omap_head); + if (used_pgmeta_omap_head.count(omap_head) == 0) { + derr << "fsck error: found stray (pgmeta) omap data on omap_head " + << omap_head << dendl; + ++errors; + } + } + } + dout(1) << __func__ << " checking deferred events" << dendl; + it = db->get_iterator(PREFIX_DEFERRED); + 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 (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( + e.get_start(), e.get_len(), fm->get_alloc_size(), used_blocks, + [&](uint64_t pos, mempool_dynamic_bitset &bs) { + ceph_assert(pos < bs.size()); + bs.set(pos); + } + ); + } + } + } + + dout(1) << __func__ << " checking freelist vs allocated" << dendl; + { + // remove bluefs_extents from used set since the freelist doesn't + // know they are allocated. + for (auto e = bluefs_extents.begin(); e != bluefs_extents.end(); ++e) { + apply( + e.get_start(), e.get_len(), fm->get_alloc_size(), used_blocks, + [&](uint64_t pos, mempool_dynamic_bitset &bs) { + ceph_assert(pos < bs.size()); + bs.reset(pos); + } + ); + } + fm->enumerate_reset(); + uint64_t offset, length; + while (fm->enumerate_next(db, &offset, &length)) { + bool intersects = false; + apply( + offset, length, fm->get_alloc_size(), used_blocks, + [&](uint64_t pos, mempool_dynamic_bitset &bs) { + ceph_assert(pos < bs.size()); + if (bs.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) { + 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, " << repaired + << " repaired, " << (errors - (int)repaired) << " remaining in " + << duration << " seconds" << dendl; + return errors - (int)repaired; +} + +/// 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_leaked(uint64_t len) +{ + KeyValueDB::Transaction txn; + txn = db->get_transaction(); + + PExtentVector exts; + int64_t alloc_len = alloc->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); + { + RWLock::WLocker 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_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); + { + RWLock::WLocker 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); + { + RWLock::WLocker 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); + { + RWLock::WLocker 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::collect_metadata(map<string,string> *pm) +{ + dout(10) << __func__ << dendl; + bdev->collect_metadata("bluestore_bdev_", pm); + if (bluefs) { + (*pm)["bluefs"] = "1"; + (*pm)["bluefs_single_shared_device"] = stringify((int)bluefs_single_shared_device); + bluefs->collect_metadata(pm, bluefs_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(); + + buf->omap_allocated = db->estimate_prefix_size(PREFIX_OMAP); + + uint64_t bfree = alloc->get_free(); + + if (bluefs) { + int64_t bluefs_total = bluefs->get_total(bluefs_shared_bdev); + int64_t bluefs_free = bluefs->get_free(bluefs_shared_bdev); + // part of our shared device is "free" according to BlueFS, but we + // can't touch bluestore_bluefs_min of it. + int64_t shared_available = std::min( + bluefs_free, + int64_t(bluefs_total - cct->_conf->bluestore_bluefs_min)); + buf->internally_reserved = bluefs_total - shared_available; + if (shared_available > 0) { + bfree += shared_available; + } + // include dedicated db, too, if that isn't the shared device. + if (bluefs_shared_bdev != BlueFS::BDEV_DB) { + buf->total += bluefs->get_total(BlueFS::BDEV_DB); + } + // call any non-omap bluefs space "internal metadata" + buf->internal_metadata = + std::max(bluefs->get_used(), (uint64_t)cct->_conf->bluestore_bluefs_min) + - 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) +{ + 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); + } + 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; +} + +// --------------- +// cache + +BlueStore::CollectionRef BlueStore::_get_collection(const coll_t& cid) +{ + RWLock::RLocker 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([&](OnodeRef 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_extents = 0; + uint64_t num_blobs = 0; + uint64_t num_buffers = 0; + uint64_t num_buffer_bytes = 0; + for (auto c : cache_shards) { + c->add_stats(&num_onodes, &num_extents, &num_blobs, + &num_buffers, &num_buffer_bytes); + } + logger->set(l_bluestore_onodes, num_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) +{ + RWLock::WLocker l(coll_lock); + Collection *c = new Collection( + this, + cache_shards[cid.hash_to_shard(cache_shards.size())], + cid); + new_coll_map[cid] = c; + _osr_attach(c); + return c; +} + +void BlueStore::set_collection_commit_queue( + const coll_t& cid, + ContextQueue *commit_queue) +{ + if (commit_queue) { + RWLock::RLocker 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; + + { + RWLock::RLocker 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; + + { + RWLock::RLocker 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; + RWLock::WLocker 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; + { + RWLock::RLocker 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; +} + +// -------------------------------------------------------- +// 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 ostream& operator<<(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; + bufferlist 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 ostream& operator<<(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 list<read_req_t> regions2read_t; +typedef map<BlueStore::BlobRef, regions2read_t> blobs2read_t; + +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); + + ready_regions_t ready_regions; + + // 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) + blobs2read_t blobs2read; + unsigned left = length; + uint64_t pos = offset; + unsigned num_regions = 0; + 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].claim(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)); + } + } + ++num_regions; + } + pos += l; + b_off += l; + left -= l; + b_len -= l; + } + ++lp; + } + + // read raw blob data. use aio if we have >1 blobs to read. + 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 + 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(); + r = bptr->get_blob().map( + 0, bptr->get_blob().get_ondisk_length(), + [&](uint64_t offset, uint64_t length) { + int r; + // use aio if there are more regions to read than those in this blob + if (num_regions > r2r.size()) { + r = bdev->aio_read(offset, length, &bl, &ioc); + } else { + r = bdev->read(offset, length, &bl, &ioc, false); + } + 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 + r = bptr->get_blob().map( + req.r_off, req.r_len, + [&](uint64_t offset, uint64_t length) { + int r; + // use aio if there is more than one region to read + if (num_regions > 1) { + r = bdev->aio_read(offset, length, &req.bl, &ioc); + } else { + r = bdev->read(offset, length, &req.bl, &ioc, false); + } + 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); + } + } + } + + int64_t num_ios = length; + 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); } + ); + + // 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) { + // 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); + } + bufferlist raw_bl; + 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) { + // 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); + } + 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(); + 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); + 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; + } + 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); + 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; + { + RWLock::RLocker 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) { + m.move_into(destmap); + } + 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; + { + RWLock::RLocker 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; + { + RWLock::RLocker 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) +{ + RWLock::RLocker 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) +{ + RWLock::RLocker 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()); + RWLock::RLocker 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; + { + RWLock::RLocker 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; + { + RWLock::RLocker 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; + + auto start_time = mono_clock::now(); + int r = 0; + 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; + bool set_next = false; + ghobject_t pend; + bool temp; + + if (!pnext) + pnext = &static_next; + + if (start.is_max() || start.hobj.is_max()) { + goto out; + } + get_coll_range(c->cid, c->cnode.bits, &coll_range_temp_start, + &coll_range_temp_end, &coll_range_start, &coll_range_end); + 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 + goto out; + } 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(); + set_next = true; + } + 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(); + set_next = true; + } + 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(); + set_next = true; + break; + } + ls->push_back(it->oid()); + it->next(); + } +out: + if (!set_next) { + *pnext = ghobject_t::get_max(); + } + log_latency_fn( + __func__, + l_bluestore_clist_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(); + } + ); + return r; +} + +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()); + dout(15) << __func__ << " " << c->get_cid() << " oid " << oid << dendl; + if (!c->exists) + return -ENOENT; + RWLock::RLocker 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->onode.is_pgmeta_omap() ? PREFIX_PGMETA_OMAP : PREFIX_OMAP; + KeyValueDB::Iterator it = db->get_iterator(prefix); + string head, tail; + get_omap_header(o->onode.nid, &head); + get_omap_tail(o->onode.nid, &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; + 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: + dout(10) << __func__ << " " << c->get_cid() << " oid " << oid << " = " << r + << dendl; + 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; + RWLock::RLocker 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; + get_omap_header(o->onode.nid, &head); + if (db->get(o->onode.is_pgmeta_omap() ? PREFIX_PGMETA_OMAP : PREFIX_OMAP, + 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(); + RWLock::RLocker 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->onode.is_pgmeta_omap() ? PREFIX_PGMETA_OMAP : PREFIX_OMAP; + KeyValueDB::Iterator it = db->get_iterator(prefix); + string head, tail; + get_omap_key(o->onode.nid, string(), &head); + get_omap_tail(o->onode.nid, &tail); + it->lower_bound(head); + while (it->valid()) { + if (it->key() >= tail) { + dout(30) << __func__ << " reached tail" << dendl; + break; + } + string user_key; + 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; + RWLock::RLocker 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; + { + const string& prefix = + o->onode.is_pgmeta_omap() ? PREFIX_PGMETA_OMAP : PREFIX_OMAP; + o->flush(); + _key_encode_u64(o->onode.nid, &final_key); + final_key.push_back('.'); + for (set<string>::const_iterator p = keys.begin(); p != keys.end(); ++p) { + final_key.resize(9); // 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; +} + +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; + RWLock::RLocker 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; + { + const string& prefix = + o->onode.is_pgmeta_omap() ? PREFIX_PGMETA_OMAP : PREFIX_OMAP; + o->flush(); + _key_encode_u64(o->onode.nid, &final_key); + final_key.push_back('.'); + for (set<string>::const_iterator p = keys.begin(); p != keys.end(); ++p) { + final_key.resize(9); // 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(); + } + RWLock::RLocker 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; + KeyValueDB::Iterator it = db->get_iterator( + o->onode.is_pgmeta_omap() ? PREFIX_PGMETA_OMAP : PREFIX_OMAP); + return ObjectMap::ObjectMapIterator(new OmapIteratorImpl(c, o, it)); +} + +// ----------------- +// write helpers + +uint64_t BlueStore::_get_ondisk_reserved() const { + 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 (buffer::error& e) { + derr << __func__ << " unable to read nid_max" << dendl; + return -EIO; + } + dout(10) << __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 (buffer::error& e) { + derr << __func__ << " unable to read blobid_max" << dendl; + return -EIO; + } + dout(10) << __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(10) << __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 (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 (buffer::error& e) { + derr << __func__ << " unable to read compat_ondisk_format" << dendl; + return -EIO; + } + } + } + dout(10) << __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 (buffer::error& e) { + derr << __func__ << " unable to read min_alloc_size" << dendl; + return -EIO; + } + dout(10) << __func__ << " min_alloc_size 0x" << std::hex << min_alloc_size + << std::dec << dendl; + } + _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); + + 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 + KeyValueDB::Transaction t = db->get_transaction(); + { + 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 (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; + _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) +{ + TransContext *txc = new TransContext(cct, c, osr, on_commits); + txc->t = db->get_transaction(); + 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; + 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->state) { + case TransContext::STATE_PREPARE: + txc->log_state_latency(logger, l_bluestore_state_prepare_lat); + if (txc->ioc.has_pending_aios()) { + txc->state = TransContext::STATE_AIO_WAIT; + txc->had_ios = true; + _txc_aio_submit(txc); + return; + } + // ** fall-thru ** + + case TransContext::STATE_AIO_WAIT: + { + utime_t lat = txc->log_state_latency(logger, l_bluestore_state_aio_wait_lat); + if (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; + } + txc->log_state_latency(logger, l_bluestore_state_io_done_lat); + txc->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 { + int r = cct->_conf->bluestore_debug_omit_kv_commit ? 0 : db->submit_transaction(txc->t); + ceph_assert(r == 0); + txc->state = TransContext::STATE_KV_SUBMITTED; + _txc_applied_kv(txc); + } + } + { + std::lock_guard l(kv_lock); + kv_queue.push_back(txc); + kv_cond.notify_one(); + if (txc->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: + txc->log_state_latency(logger, l_bluestore_state_kv_done_lat); + if (txc->deferred_txn) { + txc->state = TransContext::STATE_DEFERRED_QUEUED; + _deferred_queue(txc); + return; + } + txc->state = TransContext::STATE_FINISHING; + break; + + case TransContext::STATE_DEFERRED_CLEANUP: + txc->log_state_latency(logger, l_bluestore_state_deferred_cleanup_lat); + txc->state = TransContext::STATE_FINISHING; + // ** fall-thru ** + + case TransContext::STATE_FINISHING: + txc->log_state_latency(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->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->state < TransContext::STATE_IO_DONE) { + dout(20) << __func__ << " " << txc << " blocked by " << &*p << " " + << p->get_state_name() << dendl; + return; + } + if (p->state > TransContext::STATE_IO_DONE) { + ++p; + break; + } + } + do { + _txc_state_proc(&*p++); + } while (p != osr->q.end() && + p->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)); +} + +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); + } + + _txc_update_store_statfs(txc); +} + +void BlueStore::_txc_applied_kv(TransContext *txc) +{ + 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) { + 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; + { + std::lock_guard l(txc->osr->qlock); + txc->state = TransContext::STATE_KV_DONE; + if (txc->ch->commit_queue) { + txc->ch->commit_queue->queue(txc->oncommits); + } else { + finisher.queue(txc->oncommits); + } + } + txc->log_state_latency(logger, l_bluestore_state_kv_committing_lat); + log_latency_fn( + __func__, + l_bluestore_commit_lat, + ceph::make_timespan(ceph_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->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->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->state != TransContext::STATE_DONE) { + if (txc->state == TransContext::STATE_PREPARE && + deferred_aggressive) { + // for _osr_drain_preceding() + notify = true; + } + if (txc->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); + notify = true; + } + if (notify) { + osr->qcond.notify_all(); + } + if (osr->q.empty()) { + dout(20) << __func__ << " osr " << osr << " q now empty" << dendl; + empty = true; + } + } + 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(); + txc->log_state_latency(logger, l_bluestore_state_done_lat); + 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; + alloc->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 = new OpSequencer(this, 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 + deferred_lock.lock(); + if (osr->deferred_pending && !osr->deferred_running) { + _deferred_submit_unlock(osr); + } else { + deferred_lock.unlock(); + } + } + { + // wake up any previously finished deferred events + std::lock_guard l(kv_lock); + 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 + deferred_lock.lock(); + if (osr->deferred_pending && !osr->deferred_running) { + _deferred_submit_unlock(osr); + } else { + deferred_lock.unlock(); + } + } + { + // wake up any previously finished deferred events + std::lock_guard l(kv_lock); + 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; + { + RWLock::RLocker 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; + + deferred_finisher.start(); + 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; + deferred_finisher.wait_for_empty(); + deferred_finisher.stop(); + 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_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_single_shared_device && bluefs) { + 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) { + if (txc->state == TransContext::STATE_KV_QUEUED) { + txc->log_state_latency(logger, l_bluestore_state_kv_queued_lat); + int r = cct->_conf->bluestore_debug_omit_kv_commit ? 0 : db->submit_transaction(txc->t); + ceph_assert(r == 0); + ++kv_submitted; + txc->state = TransContext::STATE_KV_SUBMITTED; + _txc_applied_kv(txc); + --txc->osr->kv_committing_serially; + if (txc->osr->kv_submitted_waiters) { + std::lock_guard l(txc->osr->qlock); + txc->osr->qcond.notify_all(); + } + + } else { + ceph_assert(txc->state == TransContext::STATE_KV_SUBMITTED); + txc->log_state_latency(logger, l_bluestore_state_kv_queued_lat); + } + 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_bytes.put(costs); + + if (bluefs && + after_flush - bluefs_last_balance > + ceph::make_timespan(cct->_conf->bluestore_bluefs_balance_interval)) { + bluefs_last_balance = after_flush; + int r = _balance_bluefs_freespace(); + ceph_assert(r >= 0); + } + + // 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); + } + } + + // 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); + + { + 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(); + } + 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 " << kv_committing.size() + << " cleaned " << deferred_stable.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); + } + + if (bluefs) { + if (!bluefs_extents_reclaiming.empty()) { + dout(0) << __func__ << " releasing old bluefs 0x" << std::hex + << bluefs_extents_reclaiming << std::dec << dendl; + int r = 0; + if (cct->_conf->bdev_enable_discard && cct->_conf->bdev_async_discard) { + r = bdev->queue_discard(bluefs_extents_reclaiming); + if (r == 0) { + goto clear; + } + } else if (cct->_conf->bdev_enable_discard) { + for (auto p = bluefs_extents_reclaiming.begin(); p != bluefs_extents_reclaiming.end(); ++p) { + bdev->discard(p.get_start(), p.get_len()); + } + } + + alloc->release(bluefs_extents_reclaiming); +clear: + bluefs_extents_reclaiming.clear(); + } + } + + 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_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->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_deferred_bytes.past_midpoint()) { + deferred_try_submit(); + } + } + + // this is as good a place as any ... + _reap_collections(); + + logger->set(l_bluestore_fragmentation, + (uint64_t)(alloc->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; +} + +bluestore_deferred_op_t *BlueStore::_get_deferred_op( + TransContext *txc, OnodeRef o) +{ + if (!txc->deferred_txn) { + txc->deferred_txn = new bluestore_deferred_transaction_t; + } + txc->deferred_txn->ops.push_back(bluestore_deferred_op_t()); + return &txc->deferred_txn->ops.back(); +} + +void BlueStore::_deferred_queue(TransContext *txc) +{ + dout(20) << __func__ << " txc " << txc << " osr " << txc->osr << dendl; + deferred_lock.lock(); + if (!txc->osr->deferred_pending && + !txc->osr->deferred_running) { + deferred_queue.push_back(*txc->osr); + } + if (!txc->osr->deferred_pending) { + txc->osr->deferred_pending = new DeferredBatch(cct, txc->osr.get()); + } + ++deferred_queue_size; + txc->osr->deferred_pending->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) { + txc->osr->deferred_pending->prepare_write( + cct, wt.seq, e.offset, e.length, p); + } + } + if (deferred_aggressive && + !txc->osr->deferred_running) { + _deferred_submit_unlock(txc->osr.get()); + } else { + deferred_lock.unlock(); + } +} + +void BlueStore::deferred_try_submit() +{ + dout(20) << __func__ << " " << deferred_queue.size() << " osrs, " + << deferred_queue_size << " txcs" << dendl; + std::lock_guard l(deferred_lock); + vector<OpSequencerRef> osrs; + osrs.reserve(deferred_queue.size()); + for (auto& osr : deferred_queue) { + osrs.push_back(&osr); + } + for (auto& osr : osrs) { + if (osr->deferred_pending) { + if (!osr->deferred_running) { + _deferred_submit_unlock(osr.get()); + deferred_lock.lock(); + } else { + dout(20) << __func__ << " osr " << osr << " already has running" + << dendl; + } + } else { + dout(20) << __func__ << " osr " << osr << " has no pending" << dendl; + } + } +} + +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; + + deferred_lock.unlock(); + + for (auto& txc : b->txcs) { + txc.log_state_latency(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; + + { + std::lock_guard l(deferred_lock); + ceph_assert(osr->deferred_running == b); + osr->deferred_running = nullptr; + if (!osr->deferred_pending) { + dout(20) << __func__ << " dequeueing" << dendl; + auto q = deferred_queue.iterator_to(*osr); + deferred_queue.erase(q); + } else if (deferred_aggressive) { + dout(20) << __func__ << " queuing async deferred_try_submit" << dendl; + deferred_finisher.queue(new C_DeferredTrySubmit(this)); + } else { + dout(20) << __func__ << " leaving queued, more pending" << dendl; + } + } + + { + uint64_t costs = 0; + { + std::lock_guard l2(osr->qlock); + for (auto& i : b->txcs) { + TransContext *txc = &i; + txc->log_state_latency(logger, l_bluestore_state_deferred_aio_wait_lat); + txc->state = TransContext::STATE_DEFERRED_CLEANUP; + costs += txc->cost; + } + } + throttle_deferred_bytes.put(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) { + std::lock_guard l(kv_lock); + kv_cond.notify_one(); + } +} + +int BlueStore::_deferred_replay() +{ + dout(10) << __func__ << " start" << dendl; + int count = 0; + int r = 0; + 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 (buffer::error& e) { + derr << __func__ << " failed to decode deferred txn " + << pretty_binary_string(it->key()) << dendl; + delete deferred_txn; + r = -EIO; + goto out; + } + TransContext *txc = _txc_create(ch.get(), osr, nullptr); + txc->deferred_txn = deferred_txn; + txc->state = TransContext::STATE_KV_DONE; + _txc_state_proc(txc); + } + 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; +} + +// --------------------------- +// 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); + + 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); + if (handle) + handle->suspend_tp_timeout(); + + auto tstart = mono_clock::now(); + throttle_bytes.get(txc->cost); + if (txc->deferred_txn) { + // ensure we do not block here because of deferred writes + if (!throttle_deferred_bytes.get_or_fail(txc->cost)) { + 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); + kv_cond.notify_one(); + } + throttle_deferred_bytes.get(txc->cost); + --deferred_aggressive; + } + } + auto tend = mono_clock::now(); + + if (handle) + handle->reset_tp_timeout(); + + logger->inc(l_bluestore_txc); + + // execute (start) + _txc_state_proc(txc); + + // 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); + } + } + + 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_type; + 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_WRITE || + op->op == Transaction::OP_ZERO) { + create = true; + } + + // object operations + RWLock::WLocker l(c->lock); + OnodeRef &o = ovec[op->oid]; + if (!o) { + ghobject_t oid = i.get_oid(op->oid); + o = c->get_onode(oid, 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_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->alloc_hint_flags); + } + 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 = buffer::create_small_page_aligned(chunk_size); + z.zero(0, front_pad, false); + pad_count += front_pad; + bl->copy(0, 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->copy(length - back_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); + + // 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 = ep; + if (prev_ep != begin) { + --prev_ep; + } else { + prev_ep = end; // to avoid this extent check as it's a duplicate + } + + 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, chunk_size)) { + 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, o); + 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); + + if (b->get_blob().csum_type) { + 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, o); + 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.claim(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; + logger->inc(l_bluestore_write_small_deferred); + 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; +} + +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); + o->extent_map.punch_hole(c, offset, length, &wctx->old_extents); + auto max_bsize = std::max(wctx->target_blob_size, min_alloc_size); + while (length > 0) { + bool new_blob = false; + uint32_t l = std::min(max_bsize, length); + BlobRef b; + uint32_t b_off = 0; + + //attempting to reuse existing blob + if (!wctx->compress) { + // look for an existing mutable blob we can reuse + auto begin = o->extent_map.extent_map.begin(); + auto end = o->extent_map.extent_map.end(); + auto ep = o->extent_map.seek_lextent(offset); + auto prev_ep = ep; + if (prev_ep != begin) { + --prev_ep; + } else { + prev_ep = end; // to avoid this extent check as it's a duplicate + } + 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) { + 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) { + 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); + } + 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); + 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; + 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; + int r = c->compress(wi.bl, t); + 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(); + 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; + } 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; + } 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; + } + 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; + } + } + PExtentVector prealloc; + prealloc.reserve(2 * wctx->writes.size());; + int64_t prealloc_left = 0; + prealloc_left = alloc->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 " << alloc->get_free() + << std::dec << dendl; + if (prealloc.size()) { + alloc->release(prealloc); + } + return -ENOSPC; + } + + dout(20) << __func__ << " prealloc " << prealloc << dendl; + auto prealloc_pos = prealloc.begin(); + + for (auto& wi : wctx->writes) { + BlobRef b = wi.b; + bluestore_blob_t& dblob = 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 " << *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 " << *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; + 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 " << *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 (l->length() <= prefer_deferred_size.load()) { + dout(20) << __func__ << " deferring small 0x" << std::hex + << l->length() << std::dec << " write via deferred" << dendl; + bluestore_deferred_op_t *op = _get_deferred_op(txc, o); + op->op = bluestore_deferred_op_t::OP_WRITE; + int r = 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; + logger->inc(l_bluestore_write_small_deferred); + } else { + 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_small_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 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; + } + } + delete &lo; + if (b->is_spanning() && !b->is_referenced()) { + dout(20) << __func__ << " spanning_blob_map removing empty " << *b + << dendl; + o->extent_map.spanning_blob_map.erase(b->id); + } + } +} + +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); + } + + if (middle_length) { + _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" + << " fadvise_flags 0x" << std::hex << fadvise_flags << 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); + } + + // 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; + + if (offset < o->onode.size) { + WriteContext wctx; + 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; + + 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->onode.is_pgmeta_omap() ? PREFIX_PGMETA_OMAP : PREFIX_OMAP, + o->onode.nid); + } + 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->onode_map.lookup(nogen); + + 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, const string& omap_prefix, + uint64_t id) +{ + string prefix, tail; + get_omap_header(id, &prefix); + get_omap_tail(id, &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->onode.is_pgmeta_omap() ? PREFIX_PGMETA_OMAP : PREFIX_OMAP, + o->onode.nid); + 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()) { + o->onode.set_omap_flag(); + if (o->oid.is_pgmeta()) { + o->onode.flags |= bluestore_onode_t::FLAG_PGMETA_OMAP; + } + txc->write_onode(o); + + const string& prefix = + o->onode.is_pgmeta_omap() ? PREFIX_PGMETA_OMAP : PREFIX_OMAP; + string key_tail; + bufferlist tail; + get_omap_tail(o->onode.nid, &key_tail); + txc->t->set(prefix, key_tail, tail); + } else { + txc->note_modified_object(o); + } + const string& prefix = + o->onode.is_pgmeta_omap() ? PREFIX_PGMETA_OMAP : PREFIX_OMAP; + string final_key; + _key_encode_u64(o->onode.nid, &final_key); + final_key.push_back('.'); + decode(num, p); + while (num--) { + string key; + bufferlist value; + decode(key, p); + decode(value, p); + final_key.resize(9); // 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()) { + o->onode.set_omap_flag(); + if (o->oid.is_pgmeta()) { + o->onode.flags |= bluestore_onode_t::FLAG_PGMETA_OMAP; + } + txc->write_onode(o); + + const string& prefix = + o->onode.is_pgmeta_omap() ? PREFIX_PGMETA_OMAP : PREFIX_OMAP; + string key_tail; + bufferlist tail; + get_omap_tail(o->onode.nid, &key_tail); + txc->t->set(prefix, key_tail, tail); + } else { + txc->note_modified_object(o); + } + const string& prefix = + o->onode.is_pgmeta_omap() ? PREFIX_PGMETA_OMAP : PREFIX_OMAP; + get_omap_header(o->onode.nid, &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->onode.is_pgmeta_omap() ? PREFIX_PGMETA_OMAP : PREFIX_OMAP; + _key_encode_u64(o->onode.nid, &final_key); + final_key.push_back('.'); + decode(num, p); + while (num--) { + string key; + decode(key, p); + final_key.resize(9); // 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->onode.is_pgmeta_omap() ? PREFIX_PGMETA_OMAP : PREFIX_OMAP; + o->flush(); + get_omap_key(o->onode.nid, first, &key_first); + get_omap_key(o->onode.nid, 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->onode.is_pgmeta_omap() ? PREFIX_PGMETA_OMAP + : PREFIX_OMAP, + newo->onode.nid); + newo->onode.clear_omap_flag(); + } + if (oldo->onode.has_omap()) { + dout(20) << __func__ << " copying omap data" << dendl; + newo->onode.set_omap_flag(); + if (newo->oid.is_pgmeta()) { + newo->onode.flags |= bluestore_onode_t::FLAG_PGMETA_OMAP; + } + const string& prefix = + newo->onode.is_pgmeta_omap() ? PREFIX_PGMETA_OMAP : PREFIX_OMAP; + KeyValueDB::Iterator it = db->get_iterator(prefix); + string head, tail; + get_omap_header(oldo->onode.nid, &head); + get_omap_tail(oldo->onode.nid, &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; + rewrite_omap_key(newo->onode.nid, it->key(), &key); + txc->t->set(prefix, key, it->value()); + } + it->next(); + } + string new_tail; + bufferlist new_tail_value; + get_omap_tail(newo->onode.nid, &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; + + { + RWLock::WLocker 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(); + { + RWLock::WLocker l(coll_lock); + if (!*c) { + r = -ENOENT; + goto out; + } + size_t nonexistent_count = 0; + ceph_assert((*c)->exists); + if ((*c)->onode_map.map_any([&](OnodeRef 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; + RWLock::WLocker l(c->lock); + RWLock::WLocker 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; + RWLock::WLocker l((*c)->lock); + RWLock::WLocker 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 + { + RWLock::WLocker 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; + } +} + + +// 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_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::_flush_cache() +{ + dout(10) << __func__ << dendl; + for (auto i : cache_shards) { + i->trim_all(); + ceph_assert(i->empty()); + } + for (auto& p : coll_map) { + if (!p.second->onode_map.empty()) { + derr << __func__ << " stray onodes on " << p.first << dendl; + p.second->onode_map.dump<0>(cct); + } + 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 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 : cache_shards) { + i->trim_all(); + } + + 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 (!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); + } + 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); + } +} + +// =========================================== +// 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) +{ + if (!remove_key_txn) { + remove_key_txn = db->get_transaction(); + } + ++to_repair_cnt; + remove_key_txn->rmkey(prefix, key); + + return true; +} + +bool BlueStoreRepairer::fix_shared_blob( + KeyValueDB *db, + uint64_t sbid, + const bufferlist* bl) +{ + KeyValueDB::Transaction txn; + if (fix_misreferences_txn) { // reuse this txn + txn = fix_misreferences_txn; + } else { + if (!fix_shared_blob_txn) { + fix_shared_blob_txn = db->get_transaction(); + } + txn = fix_shared_blob_txn; + } + string key; + get_shared_blob_key(sbid, &key); + + ++to_repair_cnt; + if (bl) { + txn->set(PREFIX_SHARED_BLOB, key, *bl); + } else { + txn->rmkey(PREFIX_SHARED_BLOB, key); + } + return true; +} + +bool BlueStoreRepairer::fix_statfs(KeyValueDB *db, + const string& key, + const store_statfs_t& new_statfs) +{ + 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) +{ + 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) +{ + 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_bluefs_extents(std::atomic<uint64_t>& out_of_sync_flag) +{ + // this is just a stub to count num of repairs properly, + // actual repair happens in BlueStore::_close_db_and_around() + // while doing _sync_bluefs_and_fm + ++out_of_sync_flag; + ++to_repair_cnt; + return true; +} +KeyValueDB::Transaction BlueStoreRepairer::fix_spanning_blobs(KeyValueDB* db) +{ + if (!fix_onode_txn) { + fix_onode_txn = db->get_transaction(); + } + ++to_repair_cnt; + return fix_onode_txn; +} + +bool BlueStoreRepairer::preprocess_misreference(KeyValueDB *db) +{ + 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) +{ + 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; + } + 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_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_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 +{ + res.emplace_back(base, l_totals[LEVEL_DB - LEVEL_FIRST]); + res.emplace_back(base + ".slow", l_totals[LEVEL_SLOW - LEVEL_FIRST]); +} + +void* RocksDBBlueFSVolumeSelector::get_hint_by_dir(const string& 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*, 7> names{ { + "DEV/LEV", + "WAL", + "DB", + "SLOW", + "*", + "*", + "REAL" + } }; + 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_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_usage.at(d, l))); + } + sout.setf(std::ios::left, std::ios::adjustfield); + sout.width(width); + sout << stringify(byte_u_t(per_level_per_dev_usage.at(max_x - 1, 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_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; + } + } +} + +// ======================================================= |