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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:54:28 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:54:28 +0000 |
commit | e6918187568dbd01842d8d1d2c808ce16a894239 (patch) | |
tree | 64f88b554b444a49f656b6c656111a145cbbaa28 /src/rocksdb/db/blob/blob_file_reader.h | |
parent | Initial commit. (diff) | |
download | ceph-upstream/18.2.2.tar.xz ceph-upstream/18.2.2.zip |
Adding upstream version 18.2.2.upstream/18.2.2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/rocksdb/db/blob/blob_file_reader.h | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/src/rocksdb/db/blob/blob_file_reader.h b/src/rocksdb/db/blob/blob_file_reader.h new file mode 100644 index 000000000..75b756da1 --- /dev/null +++ b/src/rocksdb/db/blob/blob_file_reader.h @@ -0,0 +1,108 @@ +// Copyright (c) 2011-present, Facebook, Inc. All rights reserved. +// This source code is licensed under both the GPLv2 (found in the +// COPYING file in the root directory) and Apache 2.0 License +// (found in the LICENSE.Apache file in the root directory). + +#pragma once + +#include <cinttypes> +#include <memory> + +#include "db/blob/blob_read_request.h" +#include "file/random_access_file_reader.h" +#include "rocksdb/compression_type.h" +#include "rocksdb/rocksdb_namespace.h" +#include "util/autovector.h" + +namespace ROCKSDB_NAMESPACE { + +class Status; +struct ImmutableOptions; +struct FileOptions; +class HistogramImpl; +struct ReadOptions; +class Slice; +class FilePrefetchBuffer; +class BlobContents; +class Statistics; + +class BlobFileReader { + public: + static Status Create(const ImmutableOptions& immutable_options, + const FileOptions& file_options, + uint32_t column_family_id, + HistogramImpl* blob_file_read_hist, + uint64_t blob_file_number, + const std::shared_ptr<IOTracer>& io_tracer, + std::unique_ptr<BlobFileReader>* reader); + + BlobFileReader(const BlobFileReader&) = delete; + BlobFileReader& operator=(const BlobFileReader&) = delete; + + ~BlobFileReader(); + + Status GetBlob(const ReadOptions& read_options, const Slice& user_key, + uint64_t offset, uint64_t value_size, + CompressionType compression_type, + FilePrefetchBuffer* prefetch_buffer, + MemoryAllocator* allocator, + std::unique_ptr<BlobContents>* result, + uint64_t* bytes_read) const; + + // offsets must be sorted in ascending order by caller. + void MultiGetBlob( + const ReadOptions& read_options, MemoryAllocator* allocator, + autovector<std::pair<BlobReadRequest*, std::unique_ptr<BlobContents>>>& + blob_reqs, + uint64_t* bytes_read) const; + + CompressionType GetCompressionType() const { return compression_type_; } + + uint64_t GetFileSize() const { return file_size_; } + + private: + BlobFileReader(std::unique_ptr<RandomAccessFileReader>&& file_reader, + uint64_t file_size, CompressionType compression_type, + SystemClock* clock, Statistics* statistics); + + static Status OpenFile(const ImmutableOptions& immutable_options, + const FileOptions& file_opts, + HistogramImpl* blob_file_read_hist, + uint64_t blob_file_number, + const std::shared_ptr<IOTracer>& io_tracer, + uint64_t* file_size, + std::unique_ptr<RandomAccessFileReader>* file_reader); + + static Status ReadHeader(const RandomAccessFileReader* file_reader, + uint32_t column_family_id, Statistics* statistics, + CompressionType* compression_type); + + static Status ReadFooter(const RandomAccessFileReader* file_reader, + uint64_t file_size, Statistics* statistics); + + using Buffer = std::unique_ptr<char[]>; + + static Status ReadFromFile(const RandomAccessFileReader* file_reader, + uint64_t read_offset, size_t read_size, + Statistics* statistics, Slice* slice, Buffer* buf, + AlignedBuf* aligned_buf, + Env::IOPriority rate_limiter_priority); + + static Status VerifyBlob(const Slice& record_slice, const Slice& user_key, + uint64_t value_size); + + static Status UncompressBlobIfNeeded(const Slice& value_slice, + CompressionType compression_type, + MemoryAllocator* allocator, + SystemClock* clock, + Statistics* statistics, + std::unique_ptr<BlobContents>* result); + + std::unique_ptr<RandomAccessFileReader> file_reader_; + uint64_t file_size_; + CompressionType compression_type_; + SystemClock* clock_; + Statistics* statistics_; +}; + +} // namespace ROCKSDB_NAMESPACE |