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https://github.com/facebook/rocksdb.git
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35af0433cf
Summary: Forgot to re-test crash test after adding read-only filesystem enforcement to https://github.com/facebook/rocksdb/issues/8142. The problem is ReadOnlyFileSystem would reject CreateDirIfMissing whenever DBOptions::create_if_missing=true. The fix that is better for users is to allow CreateDirIfMissing in ReadOnlyFileSystem if the directory exists, so that they don't cause a failure on using create_if_missing with opening backups as read-only DBs. Added this option test to the unit test (in addition to being in the crash test). Also fixed a couple of lints. And some better messaging from 'make format' so that when you run it with uncommitted changes, it's clear that it's only checking the uncommitted changes. Pull Request resolved: https://github.com/facebook/rocksdb/pull/8161 Test Plan: local blackbox_crash_test with amplified backup_one_in Reviewed By: ajkr Differential Revision: D27614409 Pulled By: pdillinger fbshipit-source-id: 63ccb626c7e34c200d61c6bca2a8f60da9015179
132 lines
5.4 KiB
C++
132 lines
5.4 KiB
C++
// Copyright (c) Facebook, Inc. and its affiliates. 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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#pragma once
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#ifndef ROCKSDB_LITE
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#include <utility>
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#include "rocksdb/file_system.h"
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namespace ROCKSDB_NAMESPACE {
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// An abstract FileSystem wrapper that creates a view of an existing
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// FileSystem by remapping names in some way.
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//
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// This class has not been fully analyzed for providing strong security
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// guarantees.
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class RemapFileSystem : public FileSystemWrapper {
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public:
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explicit RemapFileSystem(const std::shared_ptr<FileSystem>& base);
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protected:
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// Returns status and mapped-to path in the wrapped filesystem.
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// If it returns non-OK status, the returned path should not be used.
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virtual std::pair<IOStatus, std::string> EncodePath(
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const std::string& path) = 0;
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// Similar to EncodePath() except used in cases in which it is OK for
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// no file or directory on 'path' to already exist, such as if the
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// operation would create one. However, the parent of 'path' is expected
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// to exist for the operation to succeed.
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// Default implementation: call EncodePath
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virtual std::pair<IOStatus, std::string> EncodePathWithNewBasename(
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const std::string& path);
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public:
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// Left abstract:
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// const char* Name() const override { ... }
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Status RegisterDbPaths(const std::vector<std::string>& paths) override;
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Status UnregisterDbPaths(const std::vector<std::string>& paths) override;
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IOStatus NewSequentialFile(const std::string& fname,
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const FileOptions& options,
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std::unique_ptr<FSSequentialFile>* result,
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IODebugContext* dbg) override;
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IOStatus NewRandomAccessFile(const std::string& fname,
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const FileOptions& options,
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std::unique_ptr<FSRandomAccessFile>* result,
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IODebugContext* dbg) override;
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IOStatus NewWritableFile(const std::string& fname, const FileOptions& options,
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std::unique_ptr<FSWritableFile>* result,
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IODebugContext* dbg) override;
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IOStatus ReuseWritableFile(const std::string& fname,
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const std::string& old_fname,
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const FileOptions& options,
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std::unique_ptr<FSWritableFile>* result,
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IODebugContext* dbg) override;
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IOStatus NewRandomRWFile(const std::string& fname, const FileOptions& options,
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std::unique_ptr<FSRandomRWFile>* result,
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IODebugContext* dbg) override;
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IOStatus NewDirectory(const std::string& dir, const IOOptions& options,
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std::unique_ptr<FSDirectory>* result,
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IODebugContext* dbg) override;
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IOStatus FileExists(const std::string& fname, const IOOptions& options,
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IODebugContext* dbg) override;
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IOStatus GetChildren(const std::string& dir, const IOOptions& options,
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std::vector<std::string>* result,
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IODebugContext* dbg) override;
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IOStatus GetChildrenFileAttributes(const std::string& dir,
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const IOOptions& options,
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std::vector<FileAttributes>* result,
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IODebugContext* dbg) override;
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IOStatus DeleteFile(const std::string& fname, const IOOptions& options,
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IODebugContext* dbg) override;
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IOStatus CreateDir(const std::string& dirname, const IOOptions& options,
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IODebugContext* dbg) override;
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IOStatus CreateDirIfMissing(const std::string& dirname,
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const IOOptions& options,
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IODebugContext* dbg) override;
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IOStatus DeleteDir(const std::string& dirname, const IOOptions& options,
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IODebugContext* dbg) override;
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IOStatus GetFileSize(const std::string& fname, const IOOptions& options,
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uint64_t* file_size, IODebugContext* dbg) override;
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IOStatus GetFileModificationTime(const std::string& fname,
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const IOOptions& options,
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uint64_t* file_mtime,
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IODebugContext* dbg) override;
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IOStatus IsDirectory(const std::string& path, const IOOptions& options,
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bool* is_dir, IODebugContext* dbg) override;
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IOStatus RenameFile(const std::string& src, const std::string& dest,
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const IOOptions& options, IODebugContext* dbg) override;
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IOStatus LinkFile(const std::string& src, const std::string& dest,
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const IOOptions& options, IODebugContext* dbg) override;
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IOStatus LockFile(const std::string& fname, const IOOptions& options,
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FileLock** lock, IODebugContext* dbg) override;
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IOStatus NewLogger(const std::string& fname, const IOOptions& options,
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std::shared_ptr<Logger>* result,
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IODebugContext* dbg) override;
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IOStatus GetAbsolutePath(const std::string& db_path, const IOOptions& options,
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std::string* output_path,
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IODebugContext* dbg) override;
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};
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} // namespace ROCKSDB_NAMESPACE
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#endif // ROCKSDB_LITE
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