mirror of https://github.com/facebook/rocksdb.git
65 lines
2.3 KiB
C++
65 lines
2.3 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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//
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// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file. See the AUTHORS file for names of contributors.
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#include "table/block_based/reader_common.h"
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#include "monitoring/perf_context_imp.h"
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#include "util/coding.h"
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#include "util/crc32c.h"
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#include "util/hash.h"
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#include "util/string_util.h"
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#include "util/xxhash.h"
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namespace ROCKSDB_NAMESPACE {
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void ForceReleaseCachedEntry(void* arg, void* h) {
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Cache* cache = reinterpret_cast<Cache*>(arg);
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Cache::Handle* handle = reinterpret_cast<Cache::Handle*>(h);
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cache->Release(handle, true /* force_erase */);
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}
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Status VerifyBlockChecksum(ChecksumType type, const char* data,
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size_t block_size, const std::string& file_name,
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uint64_t offset) {
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PERF_TIMER_GUARD(block_checksum_time);
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// After block_size bytes is compression type (1 byte), which is part of
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// the checksummed section.
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size_t len = block_size + 1;
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// And then the stored checksum value (4 bytes).
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uint32_t stored = DecodeFixed32(data + len);
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Status s;
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uint32_t computed = 0;
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switch (type) {
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case kNoChecksum:
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break;
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case kCRC32c:
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stored = crc32c::Unmask(stored);
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computed = crc32c::Value(data, len);
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break;
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case kxxHash:
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computed = XXH32(data, len, 0);
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break;
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case kxxHash64:
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computed = Lower32of64(XXH64(data, len, 0));
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break;
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default:
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s = Status::Corruption(
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"unknown checksum type " + ToString(type) + " from footer of " +
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file_name + ", while checking block at offset " + ToString(offset) +
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" size " + ToString(block_size));
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}
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if (s.ok() && stored != computed) {
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s = Status::Corruption(
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"block checksum mismatch: stored = " + ToString(stored) +
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", computed = " + ToString(computed) + " in " + file_name +
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" offset " + ToString(offset) + " size " + ToString(block_size));
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}
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return s;
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}
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} // namespace ROCKSDB_NAMESPACE
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