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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
commit | 19fcec84d8d7d21e796c7624e521b60d28ee21ed (patch) | |
tree | 42d26aa27d1e3f7c0b8bd3fd14e7d7082f5008dc /src/crimson/os/seastore/segment_manager/block.h | |
parent | Initial commit. (diff) | |
download | ceph-upstream.tar.xz ceph-upstream.zip |
Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/crimson/os/seastore/segment_manager/block.h | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/src/crimson/os/seastore/segment_manager/block.h b/src/crimson/os/seastore/segment_manager/block.h new file mode 100644 index 000000000..927b13e4e --- /dev/null +++ b/src/crimson/os/seastore/segment_manager/block.h @@ -0,0 +1,222 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#pragma once + +#include <boost/intrusive_ptr.hpp> +#include <boost/smart_ptr/intrusive_ref_counter.hpp> + +#include <seastar/core/file.hh> +#include <seastar/core/future.hh> +#include <seastar/core/reactor.hh> + +#include "crimson/common/layout.h" + +#include "crimson/os/seastore/segment_manager.h" + +namespace crimson::os::seastore::segment_manager::block { + +struct block_sm_superblock_t { + size_t size = 0; + size_t segment_size = 0; + size_t block_size = 0; + + size_t segments = 0; + uint64_t tracker_offset = 0; + uint64_t first_segment_offset = 0; + + seastore_meta_t meta; + + DENC(block_sm_superblock_t, v, p) { + DENC_START(1, 1, p); + denc(v.size, p); + denc(v.segment_size, p); + denc(v.block_size, p); + denc(v.segments, p); + denc(v.tracker_offset, p); + denc(v.first_segment_offset, p); + denc(v.meta, p); + DENC_FINISH(p); + } +}; + +using write_ertr = crimson::errorator< + crimson::ct_error::input_output_error>; +using read_ertr = crimson::errorator< + crimson::ct_error::input_output_error>; + +/** + * SegmentStateTracker + * + * Tracks lifecycle state of each segment using space at the beginning + * of the drive. + */ +class SegmentStateTracker { + using segment_state_t = Segment::segment_state_t; + + bufferptr bptr; + + using L = absl::container_internal::Layout<uint8_t>; + const L layout; + +public: + static size_t get_raw_size(size_t segments, size_t block_size) { + return p2roundup(segments, block_size); + } + + SegmentStateTracker(size_t segments, size_t block_size) + : bptr(ceph::buffer::create_page_aligned( + get_raw_size(segments, block_size))), + layout(bptr.length()) + { + ::memset( + bptr.c_str(), + static_cast<char>(segment_state_t::EMPTY), + bptr.length()); + } + + size_t get_size() const { + return bptr.length(); + } + + size_t get_capacity() const { + return bptr.length(); + } + + segment_state_t get(segment_id_t offset) const { + assert(offset < get_capacity()); + return static_cast<segment_state_t>( + layout.template Pointer<0>( + bptr.c_str())[offset]); + } + + void set(segment_id_t offset, segment_state_t state) { + assert(offset < get_capacity()); + layout.template Pointer<0>(bptr.c_str())[offset] = + static_cast<uint8_t>(state); + } + + write_ertr::future<> write_out( + seastar::file &device, + uint64_t offset); + + read_ertr::future<> read_in( + seastar::file &device, + uint64_t offset); +}; + +class BlockSegmentManager; +class BlockSegment final : public Segment { + friend class BlockSegmentManager; + BlockSegmentManager &manager; + const segment_id_t id; + segment_off_t write_pointer = 0; +public: + BlockSegment(BlockSegmentManager &manager, segment_id_t id); + + segment_id_t get_segment_id() const final { return id; } + segment_off_t get_write_capacity() const final; + segment_off_t get_write_ptr() const final { return write_pointer; } + close_ertr::future<> close() final; + write_ertr::future<> write(segment_off_t offset, ceph::bufferlist bl) final; + + ~BlockSegment() {} +}; + +/** + * BlockSegmentManager + * + * Implements SegmentManager on a conventional block device. + * SegmentStateTracker uses space at the start of the device to store + * state analagous to that of the segments of a zns device. + */ +class BlockSegmentManager final : public SegmentManager { +public: + using access_ertr = crimson::errorator< + crimson::ct_error::input_output_error, + crimson::ct_error::permission_denied, + crimson::ct_error::enoent>; + + + struct mount_config_t { + std::string path; + }; + using mount_ertr = access_ertr; + using mount_ret = access_ertr::future<>; + mount_ret mount(mount_config_t); + + struct mkfs_config_t { + std::string path; + size_t segment_size = 0; + size_t total_size = 0; + seastore_meta_t meta; + }; + using mkfs_ertr = access_ertr; + using mkfs_ret = mkfs_ertr::future<>; + static mkfs_ret mkfs(mkfs_config_t); + + using close_ertr = crimson::errorator< + crimson::ct_error::input_output_error + >; + close_ertr::future<> close(); + + BlockSegmentManager() = default; + ~BlockSegmentManager(); + + open_ertr::future<SegmentRef> open(segment_id_t id) final; + + release_ertr::future<> release(segment_id_t id) final; + + read_ertr::future<> read( + paddr_t addr, + size_t len, + ceph::bufferptr &out) final; + + size_t get_size() const final { + return superblock.size; + } + segment_off_t get_block_size() const { + return superblock.block_size; + } + segment_off_t get_segment_size() const { + return superblock.segment_size; + } + + // public so tests can bypass segment interface when simpler + Segment::write_ertr::future<> segment_write( + paddr_t addr, + ceph::bufferlist bl, + bool ignore_check=false); + +private: + friend class BlockSegment; + using segment_state_t = Segment::segment_state_t; + + + std::unique_ptr<SegmentStateTracker> tracker; + block_sm_superblock_t superblock; + seastar::file device; + + size_t get_offset(paddr_t addr) { + return superblock.first_segment_offset + + (addr.segment * superblock.segment_size) + + addr.offset; + } + + const seastore_meta_t &get_meta() const { + return superblock.meta; + } + + std::vector<segment_state_t> segment_state; + + char *buffer = nullptr; + + Segment::close_ertr::future<> segment_close(segment_id_t id); +}; + +} + +WRITE_CLASS_DENC_BOUNDED( + crimson::os::seastore::segment_manager::block::block_sm_superblock_t +) + |