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rocksdb/env/composite_env_wrapper.h

1117 lines
40 KiB

// Copyright (c) 2019-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 "rocksdb/env.h"
#include "rocksdb/file_system.h"
namespace ROCKSDB_NAMESPACE {
// The CompositeEnvWrapper class provides an interface that is compatible
// with the old monolithic Env API, and an implementation that wraps around
// the new Env that provides threading and other OS related functionality, and
// the new FileSystem API that provides storage functionality. By
// providing the old Env interface, it allows the rest of RocksDB code to
// be agnostic of whether the underlying Env implementation is a monolithic
// Env or an Env + FileSystem. In the former case, the user will specify
// Options::env only, whereas in the latter case, the user will specify
// Options::env and Options::file_system.
inline IOStatus status_to_io_status(Status&& status) {
if (status.ok()) {
// Fast path
return IOStatus::OK();
} else {
const char* state = status.getState();
if (state) {
return IOStatus(status.code(), status.subcode(),
Slice(state, strlen(status.getState()) + 1),
Slice());
} else {
return IOStatus(status.code(), status.subcode());
}
}
}
class CompositeSequentialFileWrapper : public SequentialFile {
public:
explicit CompositeSequentialFileWrapper(
std::unique_ptr<FSSequentialFile>& target)
: target_(std::move(target)) {}
Status Read(size_t n, Slice* result, char* scratch) override {
IOOptions io_opts;
IODebugContext dbg;
return target_->Read(n, io_opts, result, scratch, &dbg);
}
Status Skip(uint64_t n) override { return target_->Skip(n); }
bool use_direct_io() const override { return target_->use_direct_io(); }
size_t GetRequiredBufferAlignment() const override {
return target_->GetRequiredBufferAlignment();
}
Status InvalidateCache(size_t offset, size_t length) override {
return target_->InvalidateCache(offset, length);
}
Status PositionedRead(uint64_t offset, size_t n, Slice* result,
char* scratch) override {
IOOptions io_opts;
IODebugContext dbg;
return target_->PositionedRead(offset, n, io_opts, result, scratch, &dbg);
}
private:
std::unique_ptr<FSSequentialFile> target_;
};
class CompositeRandomAccessFileWrapper : public RandomAccessFile {
public:
explicit CompositeRandomAccessFileWrapper(
std::unique_ptr<FSRandomAccessFile>& target)
: target_(std::move(target)) {}
Status Read(uint64_t offset, size_t n, Slice* result,
char* scratch) const override {
IOOptions io_opts;
IODebugContext dbg;
return target_->Read(offset, n, io_opts, result, scratch, &dbg);
}
Status MultiRead(ReadRequest* reqs, size_t num_reqs) override {
IOOptions io_opts;
IODebugContext dbg;
std::vector<FSReadRequest> fs_reqs;
Status status;
fs_reqs.resize(num_reqs);
for (size_t i = 0; i < num_reqs; ++i) {
fs_reqs[i].offset = reqs[i].offset;
fs_reqs[i].len = reqs[i].len;
fs_reqs[i].scratch = reqs[i].scratch;
fs_reqs[i].status = IOStatus::OK();
}
status = target_->MultiRead(fs_reqs.data(), num_reqs, io_opts, &dbg);
for (size_t i = 0; i < num_reqs; ++i) {
reqs[i].result = fs_reqs[i].result;
reqs[i].status = fs_reqs[i].status;
}
return status;
}
Status Prefetch(uint64_t offset, size_t n) override {
IOOptions io_opts;
IODebugContext dbg;
return target_->Prefetch(offset, n, io_opts, &dbg);
}
size_t GetUniqueId(char* id, size_t max_size) const override {
return target_->GetUniqueId(id, max_size);
};
void Hint(AccessPattern pattern) override {
target_->Hint((FSRandomAccessFile::AccessPattern)pattern);
}
bool use_direct_io() const override { return target_->use_direct_io(); }
size_t GetRequiredBufferAlignment() const override {
return target_->GetRequiredBufferAlignment();
}
Status InvalidateCache(size_t offset, size_t length) override {
return target_->InvalidateCache(offset, length);
}
private:
std::unique_ptr<FSRandomAccessFile> target_;
};
class CompositeWritableFileWrapper : public WritableFile {
public:
explicit CompositeWritableFileWrapper(std::unique_ptr<FSWritableFile>& t)
: target_(std::move(t)) {}
Status Append(const Slice& data) override {
IOOptions io_opts;
IODebugContext dbg;
return target_->Append(data, io_opts, &dbg);
}
Status PositionedAppend(const Slice& data, uint64_t offset) override {
IOOptions io_opts;
IODebugContext dbg;
return target_->PositionedAppend(data, offset, io_opts, &dbg);
}
Status Truncate(uint64_t size) override {
IOOptions io_opts;
IODebugContext dbg;
return target_->Truncate(size, io_opts, &dbg);
}
Status Close() override {
IOOptions io_opts;
IODebugContext dbg;
return target_->Close(io_opts, &dbg);
}
Status Flush() override {
IOOptions io_opts;
IODebugContext dbg;
return target_->Flush(io_opts, &dbg);
}
Status Sync() override {
IOOptions io_opts;
IODebugContext dbg;
return target_->Sync(io_opts, &dbg);
}
Status Fsync() override {
IOOptions io_opts;
IODebugContext dbg;
return target_->Fsync(io_opts, &dbg);
}
bool IsSyncThreadSafe() const override { return target_->IsSyncThreadSafe(); }
bool use_direct_io() const override { return target_->use_direct_io(); }
size_t GetRequiredBufferAlignment() const override {
return target_->GetRequiredBufferAlignment();
}
void SetWriteLifeTimeHint(Env::WriteLifeTimeHint hint) override {
target_->SetWriteLifeTimeHint(hint);
}
Env::WriteLifeTimeHint GetWriteLifeTimeHint() override {
return target_->GetWriteLifeTimeHint();
}
uint64_t GetFileSize() override {
IOOptions io_opts;
IODebugContext dbg;
return target_->GetFileSize(io_opts, &dbg);
}
void SetPreallocationBlockSize(size_t size) override {
target_->SetPreallocationBlockSize(size);
}
void GetPreallocationStatus(size_t* block_size,
size_t* last_allocated_block) override {
target_->GetPreallocationStatus(block_size, last_allocated_block);
}
size_t GetUniqueId(char* id, size_t max_size) const override {
return target_->GetUniqueId(id, max_size);
}
Status InvalidateCache(size_t offset, size_t length) override {
return target_->InvalidateCache(offset, length);
}
Status RangeSync(uint64_t offset, uint64_t nbytes) override {
IOOptions io_opts;
IODebugContext dbg;
return target_->RangeSync(offset, nbytes, io_opts, &dbg);
}
void PrepareWrite(size_t offset, size_t len) override {
IOOptions io_opts;
IODebugContext dbg;
target_->PrepareWrite(offset, len, io_opts, &dbg);
}
Status Allocate(uint64_t offset, uint64_t len) override {
IOOptions io_opts;
IODebugContext dbg;
return target_->Allocate(offset, len, io_opts, &dbg);
}
std::unique_ptr<FSWritableFile>* target() { return &target_; }
private:
std::unique_ptr<FSWritableFile> target_;
};
class CompositeRandomRWFileWrapper : public RandomRWFile {
public:
explicit CompositeRandomRWFileWrapper(std::unique_ptr<FSRandomRWFile>& target)
: target_(std::move(target)) {}
bool use_direct_io() const override { return target_->use_direct_io(); }
size_t GetRequiredBufferAlignment() const override {
return target_->GetRequiredBufferAlignment();
}
Status Write(uint64_t offset, const Slice& data) override {
IOOptions io_opts;
IODebugContext dbg;
return target_->Write(offset, data, io_opts, &dbg);
}
Status Read(uint64_t offset, size_t n, Slice* result,
char* scratch) const override {
IOOptions io_opts;
IODebugContext dbg;
return target_->Read(offset, n, io_opts, result, scratch, &dbg);
}
Status Flush() override {
IOOptions io_opts;
IODebugContext dbg;
return target_->Flush(io_opts, &dbg);
}
Status Sync() override {
IOOptions io_opts;
IODebugContext dbg;
return target_->Sync(io_opts, &dbg);
}
Status Fsync() override {
IOOptions io_opts;
IODebugContext dbg;
return target_->Fsync(io_opts, &dbg);
}
Status Close() override {
IOOptions io_opts;
IODebugContext dbg;
return target_->Close(io_opts, &dbg);
}
private:
std::unique_ptr<FSRandomRWFile> target_;
};
class CompositeDirectoryWrapper : public Directory {
public:
explicit CompositeDirectoryWrapper(std::unique_ptr<FSDirectory>& target)
: target_(std::move(target)) {}
Status Fsync() override {
IOOptions io_opts;
IODebugContext dbg;
return target_->Fsync(io_opts, &dbg);
}
size_t GetUniqueId(char* id, size_t max_size) const override {
return target_->GetUniqueId(id, max_size);
}
private:
std::unique_ptr<FSDirectory> target_;
};
class CompositeEnvWrapper : public Env {
public:
// Initialize a CompositeEnvWrapper that delegates all thread/time related
// calls to env, and all file operations to fs
explicit CompositeEnvWrapper(Env* env, FileSystem* fs)
: env_target_(env), fs_env_target_(fs) {}
~CompositeEnvWrapper() {}
// Return the target to which this Env forwards all calls
Env* env_target() const { return env_target_; }
FileSystem* fs_env_target() const { return fs_env_target_; }
// The following text is boilerplate that forwards all methods to target()
Status NewSequentialFile(const std::string& f,
std::unique_ptr<SequentialFile>* r,
const EnvOptions& options) override {
IODebugContext dbg;
std::unique_ptr<FSSequentialFile> file;
Status status;
status =
fs_env_target_->NewSequentialFile(f, FileOptions(options), &file, &dbg);
if (status.ok()) {
r->reset(new CompositeSequentialFileWrapper(file));
}
return status;
}
Status NewRandomAccessFile(const std::string& f,
std::unique_ptr<RandomAccessFile>* r,
const EnvOptions& options) override {
IODebugContext dbg;
std::unique_ptr<FSRandomAccessFile> file;
Status status;
status = fs_env_target_->NewRandomAccessFile(f, FileOptions(options), &file,
&dbg);
if (status.ok()) {
r->reset(new CompositeRandomAccessFileWrapper(file));
}
return status;
}
Status NewWritableFile(const std::string& f, std::unique_ptr<WritableFile>* r,
const EnvOptions& options) override {
IODebugContext dbg;
std::unique_ptr<FSWritableFile> file;
Status status;
status =
fs_env_target_->NewWritableFile(f, FileOptions(options), &file, &dbg);
if (status.ok()) {
r->reset(new CompositeWritableFileWrapper(file));
}
return status;
}
Status ReopenWritableFile(const std::string& fname,
std::unique_ptr<WritableFile>* result,
const EnvOptions& options) override {
IODebugContext dbg;
Status status;
std::unique_ptr<FSWritableFile> file;
status = fs_env_target_->ReopenWritableFile(fname, FileOptions(options),
&file, &dbg);
if (status.ok()) {
result->reset(new CompositeWritableFileWrapper(file));
}
return status;
}
Status ReuseWritableFile(const std::string& fname,
const std::string& old_fname,
std::unique_ptr<WritableFile>* r,
const EnvOptions& options) override {
IODebugContext dbg;
Status status;
std::unique_ptr<FSWritableFile> file;
status = fs_env_target_->ReuseWritableFile(
fname, old_fname, FileOptions(options), &file, &dbg);
if (status.ok()) {
r->reset(new CompositeWritableFileWrapper(file));
}
return status;
}
Status NewRandomRWFile(const std::string& fname,
std::unique_ptr<RandomRWFile>* result,
const EnvOptions& options) override {
IODebugContext dbg;
std::unique_ptr<FSRandomRWFile> file;
Status status;
status = fs_env_target_->NewRandomRWFile(fname, FileOptions(options), &file,
&dbg);
if (status.ok()) {
result->reset(new CompositeRandomRWFileWrapper(file));
}
return status;
}
Status NewMemoryMappedFileBuffer(
const std::string& fname,
std::unique_ptr<MemoryMappedFileBuffer>* result) override {
return fs_env_target_->NewMemoryMappedFileBuffer(fname, result);
}
Status NewDirectory(const std::string& name,
std::unique_ptr<Directory>* result) override {
IOOptions io_opts;
IODebugContext dbg;
std::unique_ptr<FSDirectory> dir;
Status status;
status = fs_env_target_->NewDirectory(name, io_opts, &dir, &dbg);
if (status.ok()) {
result->reset(new CompositeDirectoryWrapper(dir));
}
return status;
}
Status FileExists(const std::string& f) override {
IOOptions io_opts;
IODebugContext dbg;
return fs_env_target_->FileExists(f, io_opts, &dbg);
}
Status GetChildren(const std::string& dir,
std::vector<std::string>* r) override {
IOOptions io_opts;
IODebugContext dbg;
return fs_env_target_->GetChildren(dir, io_opts, r, &dbg);
}
Status GetChildrenFileAttributes(
const std::string& dir, std::vector<FileAttributes>* result) override {
IOOptions io_opts;
IODebugContext dbg;
return fs_env_target_->GetChildrenFileAttributes(dir, io_opts, result,
&dbg);
}
Status DeleteFile(const std::string& f) override {
IOOptions io_opts;
IODebugContext dbg;
return fs_env_target_->DeleteFile(f, io_opts, &dbg);
}
Status Truncate(const std::string& fname, size_t size) override {
IOOptions io_opts;
IODebugContext dbg;
return fs_env_target_->Truncate(fname, size, io_opts, &dbg);
}
Status CreateDir(const std::string& d) override {
IOOptions io_opts;
IODebugContext dbg;
return fs_env_target_->CreateDir(d, io_opts, &dbg);
}
Status CreateDirIfMissing(const std::string& d) override {
IOOptions io_opts;
IODebugContext dbg;
return fs_env_target_->CreateDirIfMissing(d, io_opts, &dbg);
}
Status DeleteDir(const std::string& d) override {
IOOptions io_opts;
IODebugContext dbg;
return fs_env_target_->DeleteDir(d, io_opts, &dbg);
}
Status GetFileSize(const std::string& f, uint64_t* s) override {
IOOptions io_opts;
IODebugContext dbg;
return fs_env_target_->GetFileSize(f, io_opts, s, &dbg);
}
Status GetFileModificationTime(const std::string& fname,
uint64_t* file_mtime) override {
IOOptions io_opts;
IODebugContext dbg;
return fs_env_target_->GetFileModificationTime(fname, io_opts, file_mtime,
&dbg);
}
Status RenameFile(const std::string& s, const std::string& t) override {
IOOptions io_opts;
IODebugContext dbg;
return fs_env_target_->RenameFile(s, t, io_opts, &dbg);
}
Status LinkFile(const std::string& s, const std::string& t) override {
IOOptions io_opts;
IODebugContext dbg;
return fs_env_target_->LinkFile(s, t, io_opts, &dbg);
}
Status NumFileLinks(const std::string& fname, uint64_t* count) override {
IOOptions io_opts;
IODebugContext dbg;
return fs_env_target_->NumFileLinks(fname, io_opts, count, &dbg);
}
Status AreFilesSame(const std::string& first, const std::string& second,
bool* res) override {
IOOptions io_opts;
IODebugContext dbg;
return fs_env_target_->AreFilesSame(first, second, io_opts, res, &dbg);
}
Status LockFile(const std::string& f, FileLock** l) override {
IOOptions io_opts;
IODebugContext dbg;
return fs_env_target_->LockFile(f, io_opts, l, &dbg);
}
Status UnlockFile(FileLock* l) override {
IOOptions io_opts;
IODebugContext dbg;
return fs_env_target_->UnlockFile(l, io_opts, &dbg);
}
Status GetAbsolutePath(const std::string& db_path,
std::string* output_path) override {
IOOptions io_opts;
IODebugContext dbg;
return fs_env_target_->GetAbsolutePath(db_path, io_opts, output_path, &dbg);
}
#if !defined(OS_WIN) && !defined(ROCKSDB_NO_DYNAMIC_EXTENSION)
Status LoadLibrary(const std::string& lib_name,
const std::string& search_path,
std::shared_ptr<DynamicLibrary>* result) override {
return env_target_->LoadLibrary(lib_name, search_path, result);
}
#endif
void Schedule(void (*f)(void* arg), void* a, Priority pri,
void* tag = nullptr, void (*u)(void* arg) = nullptr) override {
return env_target_->Schedule(f, a, pri, tag, u);
}
int UnSchedule(void* tag, Priority pri) override {
return env_target_->UnSchedule(tag, pri);
}
void StartThread(void (*f)(void*), void* a) override {
return env_target_->StartThread(f, a);
}
void WaitForJoin() override { return env_target_->WaitForJoin(); }
unsigned int GetThreadPoolQueueLen(Priority pri = LOW) const override {
return env_target_->GetThreadPoolQueueLen(pri);
}
Status GetTestDirectory(std::string* path) override {
return env_target_->GetTestDirectory(path);
}
Status NewLogger(const std::string& fname,
std::shared_ptr<Logger>* result) override {
return env_target_->NewLogger(fname, result);
}
uint64_t NowMicros() override { return env_target_->NowMicros(); }
uint64_t NowNanos() override { return env_target_->NowNanos(); }
uint64_t NowCPUNanos() override { return env_target_->NowCPUNanos(); }
void SleepForMicroseconds(int micros) override {
env_target_->SleepForMicroseconds(micros);
}
Status GetHostName(char* name, uint64_t len) override {
return env_target_->GetHostName(name, len);
}
Status GetCurrentTime(int64_t* unix_time) override {
return env_target_->GetCurrentTime(unix_time);
}
void SetBackgroundThreads(int num, Priority pri) override {
return env_target_->SetBackgroundThreads(num, pri);
}
int GetBackgroundThreads(Priority pri) override {
return env_target_->GetBackgroundThreads(pri);
}
Status SetAllowNonOwnerAccess(bool allow_non_owner_access) override {
return env_target_->SetAllowNonOwnerAccess(allow_non_owner_access);
}
void IncBackgroundThreadsIfNeeded(int num, Priority pri) override {
return env_target_->IncBackgroundThreadsIfNeeded(num, pri);
}
void LowerThreadPoolIOPriority(Priority pool = LOW) override {
env_target_->LowerThreadPoolIOPriority(pool);
}
void LowerThreadPoolCPUPriority(Priority pool = LOW) override {
env_target_->LowerThreadPoolCPUPriority(pool);
}
std::string TimeToString(uint64_t time) override {
return env_target_->TimeToString(time);
}
Status GetThreadList(std::vector<ThreadStatus>* thread_list) override {
return env_target_->GetThreadList(thread_list);
}
ThreadStatusUpdater* GetThreadStatusUpdater() const override {
return env_target_->GetThreadStatusUpdater();
}
uint64_t GetThreadID() const override { return env_target_->GetThreadID(); }
std::string GenerateUniqueId() override {
return env_target_->GenerateUniqueId();
}
EnvOptions OptimizeForLogRead(const EnvOptions& env_options) const override {
return fs_env_target_->OptimizeForLogRead(FileOptions(env_options));
}
EnvOptions OptimizeForManifestRead(
const EnvOptions& env_options) const override {
return fs_env_target_->OptimizeForManifestRead(
FileOptions(env_options));
}
EnvOptions OptimizeForLogWrite(const EnvOptions& env_options,
const DBOptions& db_options) const override {
return fs_env_target_->OptimizeForLogWrite(FileOptions(env_options),
db_options);
}
EnvOptions OptimizeForManifestWrite(
const EnvOptions& env_options) const override {
return fs_env_target_->OptimizeForManifestWrite(
FileOptions(env_options));
}
EnvOptions OptimizeForCompactionTableWrite(
const EnvOptions& env_options,
const ImmutableDBOptions& immutable_ops) const override {
return fs_env_target_->OptimizeForCompactionTableWrite(
FileOptions(env_options),
immutable_ops);
}
EnvOptions OptimizeForCompactionTableRead(
const EnvOptions& env_options,
const ImmutableDBOptions& db_options) const override {
return fs_env_target_->OptimizeForCompactionTableRead(
FileOptions(env_options),
db_options);
}
Status GetFreeSpace(const std::string& path, uint64_t* diskfree) override {
IOOptions io_opts;
IODebugContext dbg;
return fs_env_target_->GetFreeSpace(path, io_opts, diskfree, &dbg);
}
private:
Env* env_target_;
FileSystem* fs_env_target_;
};
class LegacySequentialFileWrapper : public FSSequentialFile {
public:
explicit LegacySequentialFileWrapper(
std::unique_ptr<SequentialFile>&& _target)
: target_(std::move(_target)) {}
IOStatus Read(size_t n, const IOOptions& /*options*/, Slice* result,
char* scratch, IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->Read(n, result, scratch));
}
IOStatus Skip(uint64_t n) override {
return status_to_io_status(target_->Skip(n));
}
bool use_direct_io() const override { return target_->use_direct_io(); }
size_t GetRequiredBufferAlignment() const override {
return target_->GetRequiredBufferAlignment();
}
IOStatus InvalidateCache(size_t offset, size_t length) override {
return status_to_io_status(target_->InvalidateCache(offset, length));
}
IOStatus PositionedRead(uint64_t offset, size_t n,
const IOOptions& /*options*/, Slice* result,
char* scratch, IODebugContext* /*dbg*/) override {
return status_to_io_status(
target_->PositionedRead(offset, n, result, scratch));
}
SequentialFile* target() { return target_.get(); }
private:
std::unique_ptr<SequentialFile> target_;
};
class LegacyRandomAccessFileWrapper : public FSRandomAccessFile {
public:
explicit LegacyRandomAccessFileWrapper(
std::unique_ptr<RandomAccessFile>&& target)
: target_(std::move(target)) {}
IOStatus Read(uint64_t offset, size_t n, const IOOptions& /*options*/,
Slice* result, char* scratch,
IODebugContext* /*dbg*/) const override {
return status_to_io_status(target_->Read(offset, n, result, scratch));
}
IOStatus MultiRead(FSReadRequest* fs_reqs, size_t num_reqs,
const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
std::vector<ReadRequest> reqs;
Status status;
reqs.reserve(num_reqs);
for (size_t i = 0; i < num_reqs; ++i) {
ReadRequest req;
req.offset = fs_reqs[i].offset;
req.len = fs_reqs[i].len;
req.scratch = fs_reqs[i].scratch;
req.status = Status::OK();
reqs.emplace_back(req);
}
status = target_->MultiRead(reqs.data(), num_reqs);
for (size_t i = 0; i < num_reqs; ++i) {
fs_reqs[i].result = reqs[i].result;
fs_reqs[i].status = status_to_io_status(std::move(reqs[i].status));
}
return status_to_io_status(std::move(status));
;
}
IOStatus Prefetch(uint64_t offset, size_t n, const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->Prefetch(offset, n));
}
size_t GetUniqueId(char* id, size_t max_size) const override {
return target_->GetUniqueId(id, max_size);
};
void Hint(AccessPattern pattern) override {
target_->Hint((RandomAccessFile::AccessPattern)pattern);
}
bool use_direct_io() const override { return target_->use_direct_io(); }
size_t GetRequiredBufferAlignment() const override {
return target_->GetRequiredBufferAlignment();
}
IOStatus InvalidateCache(size_t offset, size_t length) override {
return status_to_io_status(target_->InvalidateCache(offset, length));
}
private:
std::unique_ptr<RandomAccessFile> target_;
};
class LegacyWritableFileWrapper : public FSWritableFile {
public:
explicit LegacyWritableFileWrapper(std::unique_ptr<WritableFile>&& _target)
: target_(std::move(_target)) {}
IOStatus Append(const Slice& data, const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->Append(data));
}
IOStatus PositionedAppend(const Slice& data, uint64_t offset,
const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->PositionedAppend(data, offset));
}
IOStatus Truncate(uint64_t size, const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->Truncate(size));
}
IOStatus Close(const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->Close());
}
IOStatus Flush(const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->Flush());
}
IOStatus Sync(const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->Sync());
}
IOStatus Fsync(const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->Fsync());
}
bool IsSyncThreadSafe() const override { return target_->IsSyncThreadSafe(); }
bool use_direct_io() const override { return target_->use_direct_io(); }
size_t GetRequiredBufferAlignment() const override {
return target_->GetRequiredBufferAlignment();
}
void SetWriteLifeTimeHint(Env::WriteLifeTimeHint hint) override {
target_->SetWriteLifeTimeHint(hint);
}
Env::WriteLifeTimeHint GetWriteLifeTimeHint() override {
return target_->GetWriteLifeTimeHint();
}
uint64_t GetFileSize(const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
return target_->GetFileSize();
}
void SetPreallocationBlockSize(size_t size) override {
target_->SetPreallocationBlockSize(size);
}
void GetPreallocationStatus(size_t* block_size,
size_t* last_allocated_block) override {
target_->GetPreallocationStatus(block_size, last_allocated_block);
}
size_t GetUniqueId(char* id, size_t max_size) const override {
return target_->GetUniqueId(id, max_size);
}
IOStatus InvalidateCache(size_t offset, size_t length) override {
return status_to_io_status(target_->InvalidateCache(offset, length));
}
IOStatus RangeSync(uint64_t offset, uint64_t nbytes,
const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->RangeSync(offset, nbytes));
}
void PrepareWrite(size_t offset, size_t len, const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
target_->PrepareWrite(offset, len);
}
IOStatus Allocate(uint64_t offset, uint64_t len, const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->Allocate(offset, len));
}
WritableFile* target() { return target_.get(); }
private:
std::unique_ptr<WritableFile> target_;
};
class LegacyRandomRWFileWrapper : public FSRandomRWFile {
public:
explicit LegacyRandomRWFileWrapper(std::unique_ptr<RandomRWFile>&& target)
: target_(std::move(target)) {}
bool use_direct_io() const override { return target_->use_direct_io(); }
size_t GetRequiredBufferAlignment() const override {
return target_->GetRequiredBufferAlignment();
}
IOStatus Write(uint64_t offset, const Slice& data,
const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->Write(offset, data));
}
IOStatus Read(uint64_t offset, size_t n, const IOOptions& /*options*/,
Slice* result, char* scratch,
IODebugContext* /*dbg*/) const override {
return status_to_io_status(target_->Read(offset, n, result, scratch));
}
IOStatus Flush(const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->Flush());
}
IOStatus Sync(const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->Sync());
}
IOStatus Fsync(const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->Fsync());
}
IOStatus Close(const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->Close());
}
private:
std::unique_ptr<RandomRWFile> target_;
};
class LegacyDirectoryWrapper : public FSDirectory {
public:
explicit LegacyDirectoryWrapper(std::unique_ptr<Directory>&& target)
: target_(std::move(target)) {}
IOStatus Fsync(const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->Fsync());
}
size_t GetUniqueId(char* id, size_t max_size) const override {
return target_->GetUniqueId(id, max_size);
}
private:
std::unique_ptr<Directory> target_;
};
class LegacyFileSystemWrapper : public FileSystem {
public:
// Initialize an EnvWrapper that delegates all calls to *t
explicit LegacyFileSystemWrapper(Env* t) : target_(t) {}
~LegacyFileSystemWrapper() override {}
const char* Name() const override { return "Legacy File System"; }
// Return the target to which this Env forwards all calls
Env* target() const { return target_; }
// The following text is boilerplate that forwards all methods to target()
IOStatus NewSequentialFile(const std::string& f,
const FileOptions& file_opts,
std::unique_ptr<FSSequentialFile>* r,
IODebugContext* /*dbg*/) override {
std::unique_ptr<SequentialFile> file;
Status s = target_->NewSequentialFile(f, &file, file_opts);
if (s.ok()) {
r->reset(new LegacySequentialFileWrapper(std::move(file)));
}
return status_to_io_status(std::move(s));
}
IOStatus NewRandomAccessFile(const std::string& f,
const FileOptions& file_opts,
std::unique_ptr<FSRandomAccessFile>* r,
IODebugContext* /*dbg*/) override {
std::unique_ptr<RandomAccessFile> file;
Status s = target_->NewRandomAccessFile(f, &file, file_opts);
if (s.ok()) {
r->reset(new LegacyRandomAccessFileWrapper(std::move(file)));
}
return status_to_io_status(std::move(s));
}
IOStatus NewWritableFile(const std::string& f, const FileOptions& file_opts,
std::unique_ptr<FSWritableFile>* r,
IODebugContext* /*dbg*/) override {
std::unique_ptr<WritableFile> file;
Status s = target_->NewWritableFile(f, &file, file_opts);
if (s.ok()) {
r->reset(new LegacyWritableFileWrapper(std::move(file)));
}
return status_to_io_status(std::move(s));
}
IOStatus ReopenWritableFile(const std::string& fname,
const FileOptions& file_opts,
std::unique_ptr<FSWritableFile>* result,
IODebugContext* /*dbg*/) override {
std::unique_ptr<WritableFile> file;
Status s = target_->ReopenWritableFile(fname, &file, file_opts);
if (s.ok()) {
result->reset(new LegacyWritableFileWrapper(std::move(file)));
}
return status_to_io_status(std::move(s));
}
IOStatus ReuseWritableFile(const std::string& fname,
const std::string& old_fname,
const FileOptions& file_opts,
std::unique_ptr<FSWritableFile>* r,
IODebugContext* /*dbg*/) override {
std::unique_ptr<WritableFile> file;
Status s = target_->ReuseWritableFile(fname, old_fname, &file, file_opts);
if (s.ok()) {
r->reset(new LegacyWritableFileWrapper(std::move(file)));
}
return status_to_io_status(std::move(s));
}
IOStatus NewRandomRWFile(const std::string& fname,
const FileOptions& file_opts,
std::unique_ptr<FSRandomRWFile>* result,
IODebugContext* /*dbg*/) override {
std::unique_ptr<RandomRWFile> file;
Status s = target_->NewRandomRWFile(fname, &file, file_opts);
if (s.ok()) {
result->reset(new LegacyRandomRWFileWrapper(std::move(file)));
}
return status_to_io_status(std::move(s));
}
IOStatus NewMemoryMappedFileBuffer(
const std::string& fname,
std::unique_ptr<MemoryMappedFileBuffer>* result) override {
return status_to_io_status(
target_->NewMemoryMappedFileBuffer(fname, result));
}
IOStatus NewDirectory(const std::string& name, const IOOptions& /*io_opts*/,
std::unique_ptr<FSDirectory>* result,
IODebugContext* /*dbg*/) override {
std::unique_ptr<Directory> dir;
Status s = target_->NewDirectory(name, &dir);
if (s.ok()) {
result->reset(new LegacyDirectoryWrapper(std::move(dir)));
}
return status_to_io_status(std::move(s));
}
IOStatus FileExists(const std::string& f, const IOOptions& /*io_opts*/,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->FileExists(f));
}
IOStatus GetChildren(const std::string& dir, const IOOptions& /*io_opts*/,
std::vector<std::string>* r,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->GetChildren(dir, r));
}
IOStatus GetChildrenFileAttributes(const std::string& dir,
const IOOptions& /*options*/,
std::vector<FileAttributes>* result,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->GetChildrenFileAttributes(dir, result));
}
IOStatus DeleteFile(const std::string& f, const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->DeleteFile(f));
}
IOStatus Truncate(const std::string& fname, size_t size,
const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->Truncate(fname, size));
}
IOStatus CreateDir(const std::string& d, const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->CreateDir(d));
}
IOStatus CreateDirIfMissing(const std::string& d,
const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->CreateDirIfMissing(d));
}
IOStatus DeleteDir(const std::string& d, const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->DeleteDir(d));
}
IOStatus GetFileSize(const std::string& f, const IOOptions& /*options*/,
uint64_t* s, IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->GetFileSize(f, s));
}
IOStatus GetFileModificationTime(const std::string& fname,
const IOOptions& /*options*/,
uint64_t* file_mtime,
IODebugContext* /*dbg*/) override {
return status_to_io_status(
target_->GetFileModificationTime(fname, file_mtime));
}
IOStatus GetAbsolutePath(const std::string& db_path,
const IOOptions& /*options*/,
std::string* output_path,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->GetAbsolutePath(db_path, output_path));
}
IOStatus RenameFile(const std::string& s, const std::string& t,
const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->RenameFile(s, t));
}
IOStatus LinkFile(const std::string& s, const std::string& t,
const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->LinkFile(s, t));
}
IOStatus NumFileLinks(const std::string& fname, const IOOptions& /*options*/,
uint64_t* count, IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->NumFileLinks(fname, count));
}
IOStatus AreFilesSame(const std::string& first, const std::string& second,
const IOOptions& /*options*/, bool* res,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->AreFilesSame(first, second, res));
}
IOStatus LockFile(const std::string& f, const IOOptions& /*options*/,
FileLock** l, IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->LockFile(f, l));
}
IOStatus UnlockFile(FileLock* l, const IOOptions& /*options*/,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->UnlockFile(l));
}
IOStatus GetTestDirectory(const IOOptions& /*options*/, std::string* path,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->GetTestDirectory(path));
}
IOStatus NewLogger(const std::string& fname, const IOOptions& /*options*/,
std::shared_ptr<Logger>* result,
IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->NewLogger(fname, result));
}
FileOptions OptimizeForLogRead(
const FileOptions& file_options) const override {
return target_->OptimizeForLogRead(file_options);
}
FileOptions OptimizeForManifestRead(
const FileOptions& file_options) const override {
return target_->OptimizeForManifestRead(file_options);
}
FileOptions OptimizeForLogWrite(const FileOptions& file_options,
const DBOptions& db_options) const override {
return target_->OptimizeForLogWrite(file_options, db_options);
}
FileOptions OptimizeForManifestWrite(
const FileOptions& file_options) const override {
return target_->OptimizeForManifestWrite(file_options);
}
FileOptions OptimizeForCompactionTableWrite(
const FileOptions& file_options,
const ImmutableDBOptions& immutable_ops) const override {
return target_->OptimizeForCompactionTableWrite(file_options,
immutable_ops);
}
FileOptions OptimizeForCompactionTableRead(
const FileOptions& file_options,
const ImmutableDBOptions& db_options) const override {
return target_->OptimizeForCompactionTableRead(file_options, db_options);
}
IOStatus GetFreeSpace(const std::string& path, const IOOptions& /*options*/,
uint64_t* diskfree, IODebugContext* /*dbg*/) override {
return status_to_io_status(target_->GetFreeSpace(path, diskfree));
}
private:
Env* target_;
};
inline std::unique_ptr<FSSequentialFile> NewLegacySequentialFileWrapper(
std::unique_ptr<SequentialFile>& file) {
return std::unique_ptr<FSSequentialFile>(
new LegacySequentialFileWrapper(std::move(file)));
}
inline std::unique_ptr<FSRandomAccessFile> NewLegacyRandomAccessFileWrapper(
std::unique_ptr<RandomAccessFile>& file) {
return std::unique_ptr<FSRandomAccessFile>(
new LegacyRandomAccessFileWrapper(std::move(file)));
}
inline std::unique_ptr<FSWritableFile> NewLegacyWritableFileWrapper(
std::unique_ptr<WritableFile>&& file) {
return std::unique_ptr<FSWritableFile>(
new LegacyWritableFileWrapper(std::move(file)));
}
} // namespace ROCKSDB_NAMESPACE