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rust-rocksdb/env/fs_remap.cc

341 lines
14 KiB

// Copyright (c) Facebook, Inc. and its affiliates. 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).
#include "env/fs_remap.h"
namespace ROCKSDB_NAMESPACE {
RemapFileSystem::RemapFileSystem(const std::shared_ptr<FileSystem>& base)
: FileSystemWrapper(base) {}
std::pair<IOStatus, std::string> RemapFileSystem::EncodePathWithNewBasename(
const std::string& path) {
// No difference by default
return EncodePath(path);
}
Status RemapFileSystem::RegisterDbPaths(const std::vector<std::string>& paths) {
std::vector<std::string> encoded_paths;
encoded_paths.reserve(paths.size());
for (auto& path : paths) {
auto status_and_enc_path = EncodePathWithNewBasename(path);
if (!status_and_enc_path.first.ok()) {
return status_and_enc_path.first;
}
encoded_paths.emplace_back(status_and_enc_path.second);
}
return FileSystemWrapper::RegisterDbPaths(encoded_paths);
}
Status RemapFileSystem::UnregisterDbPaths(
const std::vector<std::string>& paths) {
std::vector<std::string> encoded_paths;
encoded_paths.reserve(paths.size());
for (auto& path : paths) {
auto status_and_enc_path = EncodePathWithNewBasename(path);
if (!status_and_enc_path.first.ok()) {
return status_and_enc_path.first;
}
encoded_paths.emplace_back(status_and_enc_path.second);
}
return FileSystemWrapper::UnregisterDbPaths(encoded_paths);
}
IOStatus RemapFileSystem::NewSequentialFile(
const std::string& fname, const FileOptions& options,
std::unique_ptr<FSSequentialFile>* result, IODebugContext* dbg) {
auto status_and_enc_path = EncodePathWithNewBasename(fname);
if (!status_and_enc_path.first.ok()) {
return status_and_enc_path.first;
}
return FileSystemWrapper::NewSequentialFile(status_and_enc_path.second,
options, result, dbg);
}
IOStatus RemapFileSystem::NewRandomAccessFile(
const std::string& fname, const FileOptions& options,
std::unique_ptr<FSRandomAccessFile>* result, IODebugContext* dbg) {
auto status_and_enc_path = EncodePathWithNewBasename(fname);
if (!status_and_enc_path.first.ok()) {
return status_and_enc_path.first;
}
return FileSystemWrapper::NewRandomAccessFile(status_and_enc_path.second,
options, result, dbg);
}
IOStatus RemapFileSystem::NewWritableFile(
const std::string& fname, const FileOptions& options,
std::unique_ptr<FSWritableFile>* result, IODebugContext* dbg) {
auto status_and_enc_path = EncodePathWithNewBasename(fname);
if (!status_and_enc_path.first.ok()) {
return status_and_enc_path.first;
}
return FileSystemWrapper::NewWritableFile(status_and_enc_path.second, options,
result, dbg);
}
IOStatus RemapFileSystem::ReuseWritableFile(
const std::string& fname, const std::string& old_fname,
const FileOptions& options, std::unique_ptr<FSWritableFile>* result,
IODebugContext* dbg) {
auto status_and_enc_path = EncodePathWithNewBasename(fname);
if (!status_and_enc_path.first.ok()) {
return status_and_enc_path.first;
}
auto status_and_old_enc_path = EncodePath(old_fname);
if (!status_and_old_enc_path.first.ok()) {
return status_and_old_enc_path.first;
}
return FileSystemWrapper::ReuseWritableFile(status_and_old_enc_path.second,
status_and_old_enc_path.second,
options, result, dbg);
}
IOStatus RemapFileSystem::NewRandomRWFile(
const std::string& fname, const FileOptions& options,
std::unique_ptr<FSRandomRWFile>* result, IODebugContext* dbg) {
auto status_and_enc_path = EncodePathWithNewBasename(fname);
if (!status_and_enc_path.first.ok()) {
return status_and_enc_path.first;
}
return FileSystemWrapper::NewRandomRWFile(status_and_enc_path.second, options,
result, dbg);
}
IOStatus RemapFileSystem::NewDirectory(const std::string& dir,
const IOOptions& options,
std::unique_ptr<FSDirectory>* result,
IODebugContext* dbg) {
// A hassle to remap DirFsyncOptions::renamed_new_name
class RemapFSDirectory : public FSDirectoryWrapper {
public:
RemapFSDirectory(RemapFileSystem* fs, std::unique_ptr<FSDirectory>&& t)
: FSDirectoryWrapper(std::move(t)), fs_(fs) {}
IOStatus FsyncWithDirOptions(
const IOOptions& options, IODebugContext* dbg,
const DirFsyncOptions& dir_fsync_options) override {
if (dir_fsync_options.renamed_new_name.empty()) {
return FSDirectoryWrapper::FsyncWithDirOptions(options, dbg,
dir_fsync_options);
} else {
auto status_and_enc_path =
fs_->EncodePath(dir_fsync_options.renamed_new_name);
if (status_and_enc_path.first.ok()) {
DirFsyncOptions mapped_options = dir_fsync_options;
mapped_options.renamed_new_name = status_and_enc_path.second;
return FSDirectoryWrapper::FsyncWithDirOptions(options, dbg,
mapped_options);
} else {
return status_and_enc_path.first;
}
}
}
private:
RemapFileSystem* const fs_;
};
auto status_and_enc_path = EncodePathWithNewBasename(dir);
if (!status_and_enc_path.first.ok()) {
return status_and_enc_path.first;
}
IOStatus ios = FileSystemWrapper::NewDirectory(status_and_enc_path.second,
options, result, dbg);
if (ios.ok()) {
*result = std::make_unique<RemapFSDirectory>(this, std::move(*result));
}
return ios;
}
IOStatus RemapFileSystem::FileExists(const std::string& fname,
const IOOptions& options,
IODebugContext* dbg) {
auto status_and_enc_path = EncodePathWithNewBasename(fname);
if (!status_and_enc_path.first.ok()) {
return status_and_enc_path.first;
}
return FileSystemWrapper::FileExists(status_and_enc_path.second, options,
dbg);
}
IOStatus RemapFileSystem::GetChildren(const std::string& dir,
const IOOptions& options,
std::vector<std::string>* result,
IODebugContext* dbg) {
auto status_and_enc_path = EncodePath(dir);
if (!status_and_enc_path.first.ok()) {
return status_and_enc_path.first;
}
return FileSystemWrapper::GetChildren(status_and_enc_path.second, options,
result, dbg);
}
IOStatus RemapFileSystem::GetChildrenFileAttributes(
const std::string& dir, const IOOptions& options,
std::vector<FileAttributes>* result, IODebugContext* dbg) {
auto status_and_enc_path = EncodePath(dir);
if (!status_and_enc_path.first.ok()) {
return status_and_enc_path.first;
}
return FileSystemWrapper::GetChildrenFileAttributes(
status_and_enc_path.second, options, result, dbg);
}
IOStatus RemapFileSystem::DeleteFile(const std::string& fname,
const IOOptions& options,
IODebugContext* dbg) {
auto status_and_enc_path = EncodePath(fname);
if (!status_and_enc_path.first.ok()) {
return status_and_enc_path.first;
}
return FileSystemWrapper::DeleteFile(status_and_enc_path.second, options,
dbg);
}
IOStatus RemapFileSystem::CreateDir(const std::string& dirname,
const IOOptions& options,
IODebugContext* dbg) {
auto status_and_enc_path = EncodePathWithNewBasename(dirname);
if (!status_and_enc_path.first.ok()) {
return status_and_enc_path.first;
}
return FileSystemWrapper::CreateDir(status_and_enc_path.second, options, dbg);
}
IOStatus RemapFileSystem::CreateDirIfMissing(const std::string& dirname,
const IOOptions& options,
IODebugContext* dbg) {
auto status_and_enc_path = EncodePathWithNewBasename(dirname);
if (!status_and_enc_path.first.ok()) {
return status_and_enc_path.first;
}
return FileSystemWrapper::CreateDirIfMissing(status_and_enc_path.second,
options, dbg);
}
IOStatus RemapFileSystem::DeleteDir(const std::string& dirname,
const IOOptions& options,
IODebugContext* dbg) {
auto status_and_enc_path = EncodePath(dirname);
if (!status_and_enc_path.first.ok()) {
return status_and_enc_path.first;
}
return FileSystemWrapper::DeleteDir(status_and_enc_path.second, options, dbg);
}
IOStatus RemapFileSystem::GetFileSize(const std::string& fname,
const IOOptions& options,
uint64_t* file_size,
IODebugContext* dbg) {
auto status_and_enc_path = EncodePath(fname);
if (!status_and_enc_path.first.ok()) {
return status_and_enc_path.first;
}
return FileSystemWrapper::GetFileSize(status_and_enc_path.second, options,
file_size, dbg);
}
IOStatus RemapFileSystem::GetFileModificationTime(const std::string& fname,
const IOOptions& options,
uint64_t* file_mtime,
IODebugContext* dbg) {
auto status_and_enc_path = EncodePath(fname);
if (!status_and_enc_path.first.ok()) {
return status_and_enc_path.first;
}
return FileSystemWrapper::GetFileModificationTime(status_and_enc_path.second,
options, file_mtime, dbg);
}
IOStatus RemapFileSystem::IsDirectory(const std::string& path,
const IOOptions& options, bool* is_dir,
IODebugContext* dbg) {
auto status_and_enc_path = EncodePath(path);
if (!status_and_enc_path.first.ok()) {
return status_and_enc_path.first;
}
return FileSystemWrapper::IsDirectory(status_and_enc_path.second, options,
is_dir, dbg);
}
IOStatus RemapFileSystem::RenameFile(const std::string& src,
const std::string& dest,
const IOOptions& options,
IODebugContext* dbg) {
auto status_and_src_enc_path = EncodePath(src);
if (!status_and_src_enc_path.first.ok()) {
if (status_and_src_enc_path.first.IsNotFound()) {
const IOStatus& s = status_and_src_enc_path.first;
status_and_src_enc_path.first = IOStatus::PathNotFound(s.ToString());
}
return status_and_src_enc_path.first;
}
auto status_and_dest_enc_path = EncodePathWithNewBasename(dest);
if (!status_and_dest_enc_path.first.ok()) {
return status_and_dest_enc_path.first;
}
return FileSystemWrapper::RenameFile(status_and_src_enc_path.second,
status_and_dest_enc_path.second, options,
dbg);
}
IOStatus RemapFileSystem::LinkFile(const std::string& src,
const std::string& dest,
const IOOptions& options,
IODebugContext* dbg) {
auto status_and_src_enc_path = EncodePath(src);
if (!status_and_src_enc_path.first.ok()) {
return status_and_src_enc_path.first;
}
auto status_and_dest_enc_path = EncodePathWithNewBasename(dest);
if (!status_and_dest_enc_path.first.ok()) {
return status_and_dest_enc_path.first;
}
return FileSystemWrapper::LinkFile(status_and_src_enc_path.second,
status_and_dest_enc_path.second, options,
dbg);
}
IOStatus RemapFileSystem::LockFile(const std::string& fname,
const IOOptions& options, FileLock** lock,
IODebugContext* dbg) {
auto status_and_enc_path = EncodePathWithNewBasename(fname);
if (!status_and_enc_path.first.ok()) {
return status_and_enc_path.first;
}
// FileLock subclasses may store path (e.g., PosixFileLock stores it). We
// can skip stripping the chroot directory from this path because callers
// shouldn't use it.
return FileSystemWrapper::LockFile(status_and_enc_path.second, options, lock,
dbg);
}
IOStatus RemapFileSystem::NewLogger(const std::string& fname,
const IOOptions& options,
std::shared_ptr<Logger>* result,
IODebugContext* dbg) {
auto status_and_enc_path = EncodePathWithNewBasename(fname);
if (!status_and_enc_path.first.ok()) {
return status_and_enc_path.first;
}
return FileSystemWrapper::NewLogger(status_and_enc_path.second, options,
result, dbg);
}
IOStatus RemapFileSystem::GetAbsolutePath(const std::string& db_path,
const IOOptions& options,
std::string* output_path,
IODebugContext* dbg) {
auto status_and_enc_path = EncodePathWithNewBasename(db_path);
if (!status_and_enc_path.first.ok()) {
return status_and_enc_path.first;
}
return FileSystemWrapper::GetAbsolutePath(status_and_enc_path.second, options,
output_path, dbg);
}
} // namespace ROCKSDB_NAMESPACE