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rust-rocksdb/db_stress_tool/db_stress_env_wrapper.h

78 lines
3.2 KiB

// 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).
//
// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file. See the AUTHORS file for names of contributors.
#ifdef GFLAGS
#pragma once
#include "db_stress_tool/db_stress_common.h"
#include "monitoring/thread_status_util.h"
namespace ROCKSDB_NAMESPACE {
class DbStressRandomAccessFileWrapper : public FSRandomAccessFileOwnerWrapper {
public:
explicit DbStressRandomAccessFileWrapper(
std::unique_ptr<FSRandomAccessFile>&& target)
: FSRandomAccessFileOwnerWrapper(std::move(target)) {}
IOStatus Read(uint64_t offset, size_t n, const IOOptions& options,
Slice* result, char* scratch,
IODebugContext* dbg) const override {
#ifndef NDEBUG
const ThreadStatus::OperationType thread_op =
ThreadStatusUtil::GetThreadOperation();
Env::IOActivity io_activity =
ThreadStatusUtil::TEST_GetExpectedIOActivity(thread_op);
assert(io_activity == Env::IOActivity::kUnknown ||
io_activity == options.io_activity);
#endif
return target()->Read(offset, n, options, result, scratch, dbg);
}
};
class DbStressFSWrapper : public FileSystemWrapper {
public:
explicit DbStressFSWrapper(const std::shared_ptr<FileSystem>& t)
: FileSystemWrapper(t) {}
static const char* kClassName() { return "DbStressFS"; }
const char* Name() const override { return kClassName(); }
IOStatus NewRandomAccessFile(const std::string& f,
const FileOptions& file_opts,
std::unique_ptr<FSRandomAccessFile>* r,
IODebugContext* dbg) override {
std::unique_ptr<FSRandomAccessFile> file;
IOStatus s = target()->NewRandomAccessFile(f, file_opts, &file, dbg);
if (s.ok()) {
r->reset(new DbStressRandomAccessFileWrapper(std::move(file)));
}
return s;
}
IOStatus DeleteFile(const std::string& f, const IOOptions& opts,
IODebugContext* dbg) override {
// We determine whether it is a manifest file by searching a strong,
// so that there will be false positive if the directory path contains the
// keyword but it is unlikely.
// Checkpoint, backup, and restore directories needs to be exempted.
if (!if_preserve_all_manifests ||
f.find("MANIFEST-") == std::string::npos ||
f.find("checkpoint") != std::string::npos ||
f.find(".backup") != std::string::npos ||
f.find(".restore") != std::string::npos) {
return target()->DeleteFile(f, opts, dbg);
}
// Rename the file instead of deletion to keep the history, and
// at the same time it is not visible to RocksDB.
return target()->RenameFile(f, f + "_renamed_", opts, dbg);
}
// If true, all manifest files will not be delted in DeleteFile().
bool if_preserve_all_manifests = true;
};
} // namespace ROCKSDB_NAMESPACE
#endif // GFLAGS