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Diffstat (limited to '')
-rw-r--r-- | src/rocksdb/util/filename.h | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/src/rocksdb/util/filename.h b/src/rocksdb/util/filename.h new file mode 100644 index 00000000..eea6b1b0 --- /dev/null +++ b/src/rocksdb/util/filename.h @@ -0,0 +1,172 @@ +// 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. +// +// File names used by DB code + +#pragma once +#include <stdint.h> +#include <unordered_map> +#include <string> +#include <vector> + +#include "options/db_options.h" +#include "port/port.h" +#include "rocksdb/options.h" +#include "rocksdb/slice.h" +#include "rocksdb/status.h" +#include "rocksdb/transaction_log.h" + +namespace rocksdb { + +class Env; +class Directory; +class WritableFileWriter; + +enum FileType { + kLogFile, + kDBLockFile, + kTableFile, + kDescriptorFile, + kCurrentFile, + kTempFile, + kInfoLogFile, // Either the current one, or an old one + kMetaDatabase, + kIdentityFile, + kOptionsFile, + kBlobFile +}; + +// Return the name of the log file with the specified number +// in the db named by "dbname". The result will be prefixed with +// "dbname". +extern std::string LogFileName(const std::string& dbname, uint64_t number); + +extern std::string BlobFileName(const std::string& bdirname, uint64_t number); + +extern std::string BlobFileName(const std::string& dbname, + const std::string& blob_dir, uint64_t number); + +static const std::string ARCHIVAL_DIR = "archive"; + +extern std::string ArchivalDirectory(const std::string& dbname); + +// Return the name of the archived log file with the specified number +// in the db named by "dbname". The result will be prefixed with "dbname". +extern std::string ArchivedLogFileName(const std::string& dbname, + uint64_t num); + +extern std::string MakeTableFileName(const std::string& name, uint64_t number); + +// Return the name of sstable with LevelDB suffix +// created from RocksDB sstable suffixed name +extern std::string Rocks2LevelTableFileName(const std::string& fullname); + +// the reverse function of MakeTableFileName +// TODO(yhchiang): could merge this function with ParseFileName() +extern uint64_t TableFileNameToNumber(const std::string& name); + +// Return the name of the sstable with the specified number +// in the db named by "dbname". The result will be prefixed with +// "dbname". +extern std::string TableFileName(const std::vector<DbPath>& db_paths, + uint64_t number, uint32_t path_id); + +// Sufficient buffer size for FormatFileNumber. +const size_t kFormatFileNumberBufSize = 38; + +extern void FormatFileNumber(uint64_t number, uint32_t path_id, char* out_buf, + size_t out_buf_size); + +// Return the name of the descriptor file for the db named by +// "dbname" and the specified incarnation number. The result will be +// prefixed with "dbname". +extern std::string DescriptorFileName(const std::string& dbname, + uint64_t number); + +// Return the name of the current file. This file contains the name +// of the current manifest file. The result will be prefixed with +// "dbname". +extern std::string CurrentFileName(const std::string& dbname); + +// Return the name of the lock file for the db named by +// "dbname". The result will be prefixed with "dbname". +extern std::string LockFileName(const std::string& dbname); + +// Return the name of a temporary file owned by the db named "dbname". +// The result will be prefixed with "dbname". +extern std::string TempFileName(const std::string& dbname, uint64_t number); + +// A helper structure for prefix of info log names. +struct InfoLogPrefix { + char buf[260]; + Slice prefix; + // Prefix with DB absolute path encoded + explicit InfoLogPrefix(bool has_log_dir, const std::string& db_absolute_path); + // Default Prefix + explicit InfoLogPrefix(); +}; + +// Return the name of the info log file for "dbname". +extern std::string InfoLogFileName(const std::string& dbname, + const std::string& db_path = "", + const std::string& log_dir = ""); + +// Return the name of the old info log file for "dbname". +extern std::string OldInfoLogFileName(const std::string& dbname, uint64_t ts, + const std::string& db_path = "", + const std::string& log_dir = ""); + +static const std::string kOptionsFileNamePrefix = "OPTIONS-"; +static const std::string kTempFileNameSuffix = "dbtmp"; + +// Return a options file name given the "dbname" and file number. +// Format: OPTIONS-[number].dbtmp +extern std::string OptionsFileName(const std::string& dbname, + uint64_t file_num); + +// Return a temp options file name given the "dbname" and file number. +// Format: OPTIONS-[number] +extern std::string TempOptionsFileName(const std::string& dbname, + uint64_t file_num); + +// Return the name to use for a metadatabase. The result will be prefixed with +// "dbname". +extern std::string MetaDatabaseName(const std::string& dbname, + uint64_t number); + +// Return the name of the Identity file which stores a unique number for the db +// that will get regenerated if the db loses all its data and is recreated fresh +// either from a backup-image or empty +extern std::string IdentityFileName(const std::string& dbname); + +// If filename is a rocksdb file, store the type of the file in *type. +// The number encoded in the filename is stored in *number. If the +// filename was successfully parsed, returns true. Else return false. +// info_log_name_prefix is the path of info logs. +extern bool ParseFileName(const std::string& filename, uint64_t* number, + const Slice& info_log_name_prefix, FileType* type, + WalFileType* log_type = nullptr); +// Same as previous function, but skip info log files. +extern bool ParseFileName(const std::string& filename, uint64_t* number, + FileType* type, WalFileType* log_type = nullptr); + +// Make the CURRENT file point to the descriptor file with the +// specified number. +extern Status SetCurrentFile(Env* env, const std::string& dbname, + uint64_t descriptor_number, + Directory* directory_to_fsync); + +// Make the IDENTITY file for the db +extern Status SetIdentityFile(Env* env, const std::string& dbname); + +// Sync manifest file `file`. +extern Status SyncManifest(Env* env, const ImmutableDBOptions* db_options, + WritableFileWriter* file); + +} // namespace rocksdb |