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// 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.
//
// Repairer does best effort recovery to recover as much data as possible after
// a disaster without compromising consistency. It does not guarantee bringing
// the database to a time consistent state.
//
// Repair process is broken into 4 phases:
// (a) Find files
// (b) Convert logs to tables
// (c) Extract metadata
// (d) Write Descriptor
//
// (a) Find files
//
// The repairer goes through all the files in the directory, and classifies them
// based on their file name. Any file that cannot be identified by name will be
// ignored.
//
// (b) Convert logs to table
//
// Every log file that is active is replayed. All sections of the file where the
// checksum does not match is skipped over. We intentionally give preference to
// data consistency.
//
// (c) Extract metadata
//
// We scan every table to compute
// (1) smallest/largest for the table
// (2) largest sequence number in the table
// (3) oldest blob file referred to by the table (if applicable)
//
// If we are unable to scan the file, then we ignore the table.
//
// (d) Write Descriptor
//
// We generate descriptor contents:
// - log number is set to zero
// - next-file-number is set to 1 + largest file number we found
// - last-sequence-number is set to largest sequence# found across
// all tables (see 2c)
// - compaction pointers are cleared
// - every table file is added at level 0
//
// Possible optimization 1:
// (a) Compute total size and use to pick appropriate max-level M
// (b) Sort tables by largest sequence# in the table
// (c) For each table: if it overlaps earlier table, place in level-0,
// else place in level-M.
// (d) We can provide options for time consistent recovery and unsafe recovery
// (ignore checksum failure when applicable)
// Possible optimization 2:
// Store per-table metadata (smallest, largest, largest-seq#, ...)
// in the table's meta section to speed up ScanTable.
#include "db/version_builder.h"
#include <cinttypes>
#include "db/builder.h"
#include "db/db_impl/db_impl.h"
#include "db/dbformat.h"
#include "db/log_reader.h"
#include "db/log_writer.h"
#include "db/memtable.h"
#include "db/table_cache.h"
#include "db/version_edit.h"
#include "db/write_batch_internal.h"
#include "file/filename.h"
#include "file/writable_file_writer.h"
#include "logging/logging.h"
#include "options/cf_options.h"
#include "rocksdb/comparator.h"
#include "rocksdb/db.h"
#include "rocksdb/env.h"
#include "rocksdb/options.h"
#include "rocksdb/write_buffer_manager.h"
#include "table/scoped_arena_iterator.h"
#include "table/unique_id_impl.h"
#include "util/string_util.h"
namespace ROCKSDB_NAMESPACE {
namespace {
class Repairer {
public:
Repairer(const std::string& dbname, const DBOptions& db_options,
const std::vector<ColumnFamilyDescriptor>& column_families,
const ColumnFamilyOptions& default_cf_opts,
const ColumnFamilyOptions& unknown_cf_opts, bool create_unknown_cfs)
: dbname_(dbname),
db_session_id_(DBImpl::GenerateDbSessionId(db_options.env)),
env_(db_options.env),
file_options_(),
db_options_(SanitizeOptions(dbname_, db_options)),
immutable_db_options_(ImmutableDBOptions(db_options_)),
icmp_(default_cf_opts.comparator),
default_cf_opts_(
SanitizeOptions(immutable_db_options_, default_cf_opts)),
default_iopts_(
ImmutableOptions(immutable_db_options_, default_cf_opts_)),
unknown_cf_opts_(
SanitizeOptions(immutable_db_options_, unknown_cf_opts)),
create_unknown_cfs_(create_unknown_cfs),
raw_table_cache_(
// TableCache can be small since we expect each table to be opened
// once.
NewLRUCache(10, db_options_.table_cache_numshardbits)),
table_cache_(new TableCache(default_iopts_, &file_options_,
raw_table_cache_.get(),
/*block_cache_tracer=*/nullptr,
/*io_tracer=*/nullptr, db_session_id_)),
wb_(db_options_.db_write_buffer_size),
wc_(db_options_.delayed_write_rate),
vset_(dbname_, &immutable_db_options_, file_options_,
raw_table_cache_.get(), &wb_, &wc_,
/*block_cache_tracer=*/nullptr, /*io_tracer=*/nullptr,
/*db_id=*/"", db_session_id_),
next_file_number_(1),
db_lock_(nullptr),
closed_(false) {
for (const auto& cfd : column_families) {
cf_name_to_opts_[cfd.name] = cfd.options;
}
}
const ColumnFamilyOptions* GetColumnFamilyOptions(
const std::string& cf_name) {
if (cf_name_to_opts_.find(cf_name) == cf_name_to_opts_.end()) {
if (create_unknown_cfs_) {
return &unknown_cf_opts_;
}
return nullptr;
}
return &cf_name_to_opts_[cf_name];
}
// Adds a column family to the VersionSet with cf_options_ and updates
// manifest.
Status AddColumnFamily(const std::string& cf_name, uint32_t cf_id) {
// TODO: plumb Env::IOActivity;
const ReadOptions read_options;
const auto* cf_opts = GetColumnFamilyOptions(cf_name);
if (cf_opts == nullptr) {
return Status::Corruption("Encountered unknown column family with name=" +
cf_name + ", id=" + std::to_string(cf_id));
}
Options opts(db_options_, *cf_opts);
MutableCFOptions mut_cf_opts(opts);
VersionEdit edit;
edit.SetComparatorName(opts.comparator->Name());
edit.SetPersistUserDefinedTimestamps(opts.persist_user_defined_timestamps);
edit.SetLogNumber(0);
edit.SetColumnFamily(cf_id);
ColumnFamilyData* cfd;
cfd = nullptr;
edit.AddColumnFamily(cf_name);
mutex_.Lock();
std::unique_ptr<FSDirectory> db_dir;
Status status = env_->GetFileSystem()->NewDirectory(dbname_, IOOptions(),
&db_dir, nullptr);
if (status.ok()) {
status = vset_.LogAndApply(cfd, mut_cf_opts, read_options, &edit, &mutex_,
db_dir.get(), false /* new_descriptor_log */,
cf_opts);
}
mutex_.Unlock();
return status;
}
Status Close() {
Status s = Status::OK();
if (!closed_) {
if (db_lock_ != nullptr) {
s = env_->UnlockFile(db_lock_);
db_lock_ = nullptr;
}
closed_ = true;
}
return s;
}
~Repairer() { Close().PermitUncheckedError(); }
Status Run() {
Status status = env_->LockFile(LockFileName(dbname_), &db_lock_);
if (!status.ok()) {
return status;
}
status = FindFiles();
DBImpl* db_impl = nullptr;
if (status.ok()) {
// Discard older manifests and start a fresh one
for (size_t i = 0; i < manifests_.size(); i++) {
ArchiveFile(dbname_ + "/" + manifests_[i]);
}
// Just create a DBImpl temporarily so we can reuse NewDB()
db_impl = new DBImpl(db_options_, dbname_);
status = db_impl->NewDB(/*new_filenames=*/nullptr);
}
delete db_impl;
if (status.ok()) {
// Recover using the fresh manifest created by NewDB()
status =
vset_.Recover({{kDefaultColumnFamilyName, default_cf_opts_}}, false);
}
if (status.ok()) {
// Need to scan existing SST files first so the column families are
// created before we process WAL files
ExtractMetaData();
// ExtractMetaData() uses table_fds_ to know which SST files' metadata to
// extract -- we need to clear it here since metadata for existing SST
// files has been extracted already
table_fds_.clear();
ConvertLogFilesToTables();
ExtractMetaData();
status = AddTables();
}
if (status.ok()) {
uint64_t bytes = 0;
for (size_t i = 0; i < tables_.size(); i++) {
bytes += tables_[i].meta.fd.GetFileSize();
}
ROCKS_LOG_WARN(db_options_.info_log,
"**** Repaired rocksdb %s; "
"recovered %" ROCKSDB_PRIszt " files; %" PRIu64
" bytes. "
"Some data may have been lost. "
"****",
dbname_.c_str(), tables_.size(), bytes);
}
return status;
}
private:
struct TableInfo {
FileMetaData meta;
uint32_t column_family_id;
std::string column_family_name;
};
std::string const dbname_;
std::string db_session_id_;
Env* const env_;
const FileOptions file_options_;
const DBOptions db_options_;
const ImmutableDBOptions immutable_db_options_;
const InternalKeyComparator icmp_;
const ColumnFamilyOptions default_cf_opts_;
const ImmutableOptions default_iopts_; // table_cache_ holds reference
const ColumnFamilyOptions unknown_cf_opts_;
const bool create_unknown_cfs_;
std::shared_ptr<Cache> raw_table_cache_;
std::unique_ptr<TableCache> table_cache_;
WriteBufferManager wb_;
WriteController wc_;
VersionSet vset_;
std::unordered_map<std::string, ColumnFamilyOptions> cf_name_to_opts_;
InstrumentedMutex mutex_;
std::vector<std::string> manifests_;
std::vector<FileDescriptor> table_fds_;
std::vector<uint64_t> logs_;
std::vector<TableInfo> tables_;
uint64_t next_file_number_;
// Lock over the persistent DB state. Non-nullptr iff successfully
// acquired.
FileLock* db_lock_;
bool closed_;
Status FindFiles() {
std::vector<std::string> filenames;
bool found_file = false;
std::vector<std::string> to_search_paths;
for (size_t path_id = 0; path_id < db_options_.db_paths.size(); path_id++) {
to_search_paths.push_back(db_options_.db_paths[path_id].path);
}
// search wal_dir if user uses a customize wal_dir
bool same = immutable_db_options_.IsWalDirSameAsDBPath(dbname_);
if (!same) {
to_search_paths.push_back(immutable_db_options_.wal_dir);
}
for (size_t path_id = 0; path_id < to_search_paths.size(); path_id++) {
ROCKS_LOG_INFO(db_options_.info_log, "Searching path %s\n",
to_search_paths[path_id].c_str());
Status status = env_->GetChildren(to_search_paths[path_id], &filenames);
if (!status.ok()) {
return status;
}
if (!filenames.empty()) {
found_file = true;
}
uint64_t number;
FileType type;
for (size_t i = 0; i < filenames.size(); i++) {
if (ParseFileName(filenames[i], &number, &type)) {
if (type == kDescriptorFile) {
manifests_.push_back(filenames[i]);
} else {
if (number + 1 > next_file_number_) {
next_file_number_ = number + 1;
}
if (type == kWalFile) {
logs_.push_back(number);
} else if (type == kTableFile) {
table_fds_.emplace_back(number, static_cast<uint32_t>(path_id),
0);
} else {
// Ignore other files
}
}
}
}
}
if (!found_file) {
return Status::Corruption(dbname_, "repair found no files");
}
return Status::OK();
}
void ConvertLogFilesToTables() {
const auto& wal_dir = immutable_db_options_.GetWalDir();
for (size_t i = 0; i < logs_.size(); i++) {
// we should use LogFileName(wal_dir, logs_[i]) here. user might uses
// wal_dir option.
std::string logname = LogFileName(wal_dir, logs_[i]);
Status status = ConvertLogToTable(wal_dir, logs_[i]);
if (!status.ok()) {
ROCKS_LOG_WARN(db_options_.info_log,
"Log #%" PRIu64 ": ignoring conversion error: %s",
logs_[i], status.ToString().c_str());
}
ArchiveFile(logname);
}
}
Status ConvertLogToTable(const std::string& wal_dir, uint64_t log) {
struct LogReporter : public log::Reader::Reporter {
Env* env;
std::shared_ptr<Logger> info_log;
uint64_t lognum;
void Corruption(size_t bytes, const Status& s) override {
// We print error messages for corruption, but continue repairing.
ROCKS_LOG_ERROR(info_log, "Log #%" PRIu64 ": dropping %d bytes; %s",
lognum, static_cast<int>(bytes), s.ToString().c_str());
}
};
// TODO: plumb Env::IOActivity
const ReadOptions read_options;
// Open the log file
std::string logname = LogFileName(wal_dir, log);
const auto& fs = env_->GetFileSystem();
std::unique_ptr<SequentialFileReader> lfile_reader;
Status status = SequentialFileReader::Create(
fs, logname, fs->OptimizeForLogRead(file_options_), &lfile_reader,
nullptr /* dbg */, nullptr /* rate limiter */);
if (!status.ok()) {
return status;
}
// Create the log reader.
LogReporter reporter;
reporter.env = env_;
reporter.info_log = db_options_.info_log;
reporter.lognum = log;
// We intentionally make log::Reader do checksumming so that
// corruptions cause entire commits to be skipped instead of
// propagating bad information (like overly large sequence
// numbers).
log::Reader reader(db_options_.info_log, std::move(lfile_reader), &reporter,
true /*enable checksum*/, log);
// Initialize per-column family memtables
for (auto* cfd : *vset_.GetColumnFamilySet()) {
cfd->CreateNewMemtable(*cfd->GetLatestMutableCFOptions(),
kMaxSequenceNumber);
}
auto cf_mems = new ColumnFamilyMemTablesImpl(vset_.GetColumnFamilySet());
// Read all the records and add to a memtable
const UnorderedMap<uint32_t, size_t>& running_ts_sz =
vset_.GetRunningColumnFamiliesTimestampSize();
std::string scratch;
Slice record;
WriteBatch batch;
int counter = 0;
while (reader.ReadRecord(&record, &scratch)) {
if (record.size() < WriteBatchInternal::kHeader) {
reporter.Corruption(record.size(),
Status::Corruption("log record too small"));
continue;
}
Status record_status = WriteBatchInternal::SetContents(&batch, record);
if (record_status.ok()) {
const UnorderedMap<uint32_t, size_t>& record_ts_sz =
reader.GetRecordedTimestampSize();
record_status = HandleWriteBatchTimestampSizeDifference(
&batch, running_ts_sz, record_ts_sz,
TimestampSizeConsistencyMode::kVerifyConsistency);
if (record_status.ok()) {
record_status =
WriteBatchInternal::InsertInto(&batch, cf_mems, nullptr, nullptr);
}
}
if (record_status.ok()) {
counter += WriteBatchInternal::Count(&batch);
} else {
ROCKS_LOG_WARN(db_options_.info_log, "Log #%" PRIu64 ": ignoring %s",
log, record_status.ToString().c_str());
}
}
// Dump a table for each column family with entries in this log file.
for (auto* cfd : *vset_.GetColumnFamilySet()) {
// Do not record a version edit for this conversion to a Table
// since ExtractMetaData() will also generate edits.
MemTable* mem = cfd->mem();
if (mem->IsEmpty()) {
continue;
}
FileMetaData meta;
meta.fd = FileDescriptor(next_file_number_++, 0, 0);
// TODO: plumb Env::IOActivity
ReadOptions ro;
ro.total_order_seek = true;
Arena arena;
ScopedArenaIterator iter(mem->NewIterator(ro, &arena));
int64_t _current_time = 0;
immutable_db_options_.clock->GetCurrentTime(&_current_time)
.PermitUncheckedError(); // ignore error
const uint64_t current_time = static_cast<uint64_t>(_current_time);
meta.file_creation_time = current_time;
SnapshotChecker* snapshot_checker = DisableGCSnapshotChecker::Instance();
auto write_hint = cfd->CalculateSSTWriteHint(0);
std::vector<std::unique_ptr<FragmentedRangeTombstoneIterator>>
range_del_iters;
auto range_del_iter = mem->NewRangeTombstoneIterator(
ro, kMaxSequenceNumber, false /* immutable_memtable */);
if (range_del_iter != nullptr) {
range_del_iters.emplace_back(range_del_iter);
}
IOStatus io_s;
CompressionOptions default_compression;
TableBuilderOptions tboptions(
*cfd->ioptions(), *cfd->GetLatestMutableCFOptions(),
cfd->internal_comparator(), cfd->int_tbl_prop_collector_factories(),
kNoCompression, default_compression, cfd->GetID(), cfd->GetName(),
-1 /* level */, false /* is_bottommost */,
TableFileCreationReason::kRecovery, 0 /* oldest_key_time */,
0 /* file_creation_time */, "DB Repairer" /* db_id */, db_session_id_,
0 /*target_file_size*/, meta.fd.GetNumber());
SeqnoToTimeMapping empty_seqno_time_mapping;
status = BuildTable(
dbname_, /* versions */ nullptr, immutable_db_options_, tboptions,
file_options_, read_options, table_cache_.get(), iter.get(),
std::move(range_del_iters), &meta, nullptr /* blob_file_additions */,
{}, kMaxSequenceNumber, kMaxSequenceNumber, snapshot_checker,
false /* paranoid_file_checks*/, nullptr /* internal_stats */, &io_s,
nullptr /*IOTracer*/, BlobFileCreationReason::kRecovery,
empty_seqno_time_mapping, nullptr /* event_logger */, 0 /* job_id */,
Env::IO_HIGH, nullptr /* table_properties */, write_hint);
ROCKS_LOG_INFO(db_options_.info_log,
"Log #%" PRIu64 ": %d ops saved to Table #%" PRIu64 " %s",
log, counter, meta.fd.GetNumber(),
status.ToString().c_str());
if (status.ok()) {
if (meta.fd.GetFileSize() > 0) {
table_fds_.push_back(meta.fd);
}
} else {
break;
}
}
delete cf_mems;
return status;
}
void ExtractMetaData() {
for (size_t i = 0; i < table_fds_.size(); i++) {
TableInfo t;
t.meta.fd = table_fds_[i];
Status status = ScanTable(&t);
if (!status.ok()) {
std::string fname = TableFileName(
db_options_.db_paths, t.meta.fd.GetNumber(), t.meta.fd.GetPathId());
char file_num_buf[kFormatFileNumberBufSize];
FormatFileNumber(t.meta.fd.GetNumber(), t.meta.fd.GetPathId(),
file_num_buf, sizeof(file_num_buf));
ROCKS_LOG_WARN(db_options_.info_log, "Table #%s: ignoring %s",
file_num_buf, status.ToString().c_str());
ArchiveFile(fname);
} else {
tables_.push_back(t);
}
}
}
Status ScanTable(TableInfo* t) {
std::string fname = TableFileName(
db_options_.db_paths, t->meta.fd.GetNumber(), t->meta.fd.GetPathId());
int counter = 0;
uint64_t file_size;
Status status = env_->GetFileSize(fname, &file_size);
t->meta.fd = FileDescriptor(t->meta.fd.GetNumber(), t->meta.fd.GetPathId(),
file_size);
std::shared_ptr<const TableProperties> props;
if (status.ok()) {
// TODO: plumb Env::IOActivity
const ReadOptions read_options;
status = table_cache_->GetTableProperties(
file_options_, read_options, icmp_, t->meta, &props,
0 /* block_protection_bytes_per_key */);
}
if (status.ok()) {
auto s =
GetSstInternalUniqueId(props->db_id, props->db_session_id,
props->orig_file_number, &t->meta.unique_id);
if (!s.ok()) {
ROCKS_LOG_WARN(db_options_.info_log,
"Table #%" PRIu64
": unable to get unique id, default to Unknown.",
t->meta.fd.GetNumber());
}
t->column_family_id = static_cast<uint32_t>(props->column_family_id);
if (t->column_family_id ==
TablePropertiesCollectorFactory::Context::kUnknownColumnFamily) {
ROCKS_LOG_WARN(
db_options_.info_log,
"Table #%" PRIu64
": column family unknown (probably due to legacy format); "
"adding to default column family id 0.",
t->meta.fd.GetNumber());
t->column_family_id = 0;
}
if (vset_.GetColumnFamilySet()->GetColumnFamily(t->column_family_id) ==
nullptr) {
status =
AddColumnFamily(props->column_family_name, t->column_family_id);
}
t->meta.oldest_ancester_time = props->creation_time;
t->meta.user_defined_timestamps_persisted =
static_cast<bool>(props->user_defined_timestamps_persisted);
}
if (status.ok()) {
uint64_t tail_size = 0;
bool contain_no_data_blocks =
props->num_entries > 0 &&
(props->num_entries == props->num_range_deletions);
if (props->tail_start_offset > 0 || contain_no_data_blocks) {
assert(props->tail_start_offset <= file_size);
tail_size = file_size - props->tail_start_offset;
}
t->meta.tail_size = tail_size;
}
ColumnFamilyData* cfd = nullptr;
if (status.ok()) {
cfd = vset_.GetColumnFamilySet()->GetColumnFamily(t->column_family_id);
if (cfd->GetName() != props->column_family_name) {
ROCKS_LOG_ERROR(
db_options_.info_log,
"Table #%" PRIu64
": inconsistent column family name '%s'; expected '%s' for column "
"family id %" PRIu32 ".",
t->meta.fd.GetNumber(), props->column_family_name.c_str(),
cfd->GetName().c_str(), t->column_family_id);
status = Status::Corruption(dbname_, "inconsistent column family name");
}
}
if (status.ok()) {
// TODO: plumb Env::IOActivity
ReadOptions ropts;
ropts.total_order_seek = true;
InternalIterator* iter = table_cache_->NewIterator(
ropts, file_options_, cfd->internal_comparator(), t->meta,
nullptr /* range_del_agg */,
cfd->GetLatestMutableCFOptions()->prefix_extractor,
/*table_reader_ptr=*/nullptr, /*file_read_hist=*/nullptr,
TableReaderCaller::kRepair, /*arena=*/nullptr, /*skip_filters=*/false,
/*level=*/-1, /*max_file_size_for_l0_meta_pin=*/0,
/*smallest_compaction_key=*/nullptr,
/*largest_compaction_key=*/nullptr,
/*allow_unprepared_value=*/false,
cfd->GetLatestMutableCFOptions()->block_protection_bytes_per_key);
ParsedInternalKey parsed;
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
Slice key = iter->key();
Status pik_status =
ParseInternalKey(key, &parsed, db_options_.allow_data_in_errors);
if (!pik_status.ok()) {
ROCKS_LOG_ERROR(db_options_.info_log,
"Table #%" PRIu64 ": unparsable key - %s",
t->meta.fd.GetNumber(), pik_status.getState());
continue;
}
counter++;
status = t->meta.UpdateBoundaries(key, iter->value(), parsed.sequence,
parsed.type);
if (!status.ok()) {
break;
}
}
if (status.ok() && !iter->status().ok()) {
status = iter->status();
}
delete iter;
ROCKS_LOG_INFO(db_options_.info_log, "Table #%" PRIu64 ": %d entries %s",
t->meta.fd.GetNumber(), counter,
status.ToString().c_str());
}
if (status.ok()) {
// XXX/FIXME: This is just basic, naive handling of range tombstones,
// like call to UpdateBoundariesForRange in builder.cc where we assume
// an SST file is a full sorted run. This probably needs the extra logic
// from compaction_job.cc around call to UpdateBoundariesForRange (to
// handle range tombstones extendingg beyond range of other entries).
// TODO: plumb Env::IOActivity
ReadOptions ropts;
std::unique_ptr<FragmentedRangeTombstoneIterator> r_iter;
status = table_cache_->GetRangeTombstoneIterator(
ropts, cfd->internal_comparator(), t->meta,
cfd->GetLatestMutableCFOptions()->block_protection_bytes_per_key,
&r_iter);
if (r_iter) {
r_iter->SeekToFirst();
while (r_iter->Valid()) {
auto tombstone = r_iter->Tombstone();
auto kv = tombstone.Serialize();
t->meta.UpdateBoundariesForRange(
kv.first, tombstone.SerializeEndKey(), tombstone.seq_,
cfd->internal_comparator());
r_iter->Next();
}
}
}
return status;
}
Status AddTables() {
// TODO: plumb Env::IOActivity;
const ReadOptions read_options;
std::unordered_map<uint32_t, std::vector<const TableInfo*>> cf_id_to_tables;
SequenceNumber max_sequence = 0;
for (size_t i = 0; i < tables_.size(); i++) {
cf_id_to_tables[tables_[i].column_family_id].push_back(&tables_[i]);
if (max_sequence < tables_[i].meta.fd.largest_seqno) {
max_sequence = tables_[i].meta.fd.largest_seqno;
}
}
vset_.SetLastAllocatedSequence(max_sequence);
vset_.SetLastPublishedSequence(max_sequence);
vset_.SetLastSequence(max_sequence);
for (const auto& cf_id_and_tables : cf_id_to_tables) {
auto* cfd =
vset_.GetColumnFamilySet()->GetColumnFamily(cf_id_and_tables.first);
// Recover files' epoch number using dummy VersionStorageInfo
VersionBuilder dummy_version_builder(
cfd->current()->version_set()->file_options(), cfd->ioptions(),
cfd->table_cache(), cfd->current()->storage_info(),
cfd->current()->version_set(),
cfd->GetFileMetadataCacheReservationManager());
VersionStorageInfo dummy_vstorage(
&cfd->internal_comparator(), cfd->user_comparator(),
cfd->NumberLevels(), cfd->ioptions()->compaction_style,
nullptr /* src_vstorage */, cfd->ioptions()->force_consistency_checks,
EpochNumberRequirement::kMightMissing, cfd->ioptions()->clock,
/*bottommost_file_compaction_delay=*/0);
Status s;
VersionEdit dummy_edit;
for (const auto* table : cf_id_and_tables.second) {
// TODO(opt): separate out into multiple levels
dummy_edit.AddFile(
0, table->meta.fd.GetNumber(), table->meta.fd.GetPathId(),
table->meta.fd.GetFileSize(), table->meta.smallest,
table->meta.largest, table->meta.fd.smallest_seqno,
table->meta.fd.largest_seqno, table->meta.marked_for_compaction,
table->meta.temperature, table->meta.oldest_blob_file_number,
table->meta.oldest_ancester_time, table->meta.file_creation_time,
table->meta.epoch_number, table->meta.file_checksum,
table->meta.file_checksum_func_name, table->meta.unique_id,
table->meta.compensated_range_deletion_size, table->meta.tail_size,
table->meta.user_defined_timestamps_persisted);
}
s = dummy_version_builder.Apply(&dummy_edit);
if (s.ok()) {
s = dummy_version_builder.SaveTo(&dummy_vstorage);
}
if (s.ok()) {
dummy_vstorage.RecoverEpochNumbers(cfd);
}
if (s.ok()) {
// Record changes from this repair in VersionEdit, including files with
// recovered epoch numbers
VersionEdit edit;
edit.SetComparatorName(cfd->user_comparator()->Name());
edit.SetPersistUserDefinedTimestamps(
cfd->ioptions()->persist_user_defined_timestamps);
edit.SetLogNumber(0);
edit.SetNextFile(next_file_number_);
edit.SetColumnFamily(cfd->GetID());
for (int level = 0; level < dummy_vstorage.num_levels(); ++level) {
for (FileMetaData* file_meta : dummy_vstorage.LevelFiles(level)) {
edit.AddFile(level, *file_meta);
}
}
// Release resources occupied by the dummy VersionStorageInfo
for (int level = 0; level < dummy_vstorage.num_levels(); ++level) {
for (FileMetaData* file_meta : dummy_vstorage.LevelFiles(level)) {
file_meta->refs--;
if (file_meta->refs <= 0) {
delete file_meta;
}
}
}
// Persist record of changes
assert(next_file_number_ > 0);
vset_.MarkFileNumberUsed(next_file_number_ - 1);
mutex_.Lock();
std::unique_ptr<FSDirectory> db_dir;
s = env_->GetFileSystem()->NewDirectory(dbname_, IOOptions(), &db_dir,
nullptr);
if (s.ok()) {
s = vset_.LogAndApply(cfd, *cfd->GetLatestMutableCFOptions(),
read_options, &edit, &mutex_, db_dir.get(),
false /* new_descriptor_log */);
}
mutex_.Unlock();
}
if (!s.ok()) {
return s;
}
}
return Status::OK();
}
void ArchiveFile(const std::string& fname) {
// Move into another directory. E.g., for
// dir/foo
// rename to
// dir/lost/foo
const char* slash = strrchr(fname.c_str(), '/');
std::string new_dir;
if (slash != nullptr) {
new_dir.assign(fname.data(), slash - fname.data());
}
new_dir.append("/lost");
env_->CreateDir(new_dir).PermitUncheckedError(); // Ignore error
std::string new_file = new_dir;
new_file.append("/");
new_file.append((slash == nullptr) ? fname.c_str() : slash + 1);
Status s = env_->RenameFile(fname, new_file);
ROCKS_LOG_INFO(db_options_.info_log, "Archiving %s: %s\n", fname.c_str(),
s.ToString().c_str());
}
};
Status GetDefaultCFOptions(
const std::vector<ColumnFamilyDescriptor>& column_families,
ColumnFamilyOptions* res) {
assert(res != nullptr);
auto iter = std::find_if(column_families.begin(), column_families.end(),
[](const ColumnFamilyDescriptor& cfd) {
return cfd.name == kDefaultColumnFamilyName;
});
if (iter == column_families.end()) {
return Status::InvalidArgument(
"column_families", "Must contain entry for default column family");
}
*res = iter->options;
return Status::OK();
}
} // anonymous namespace
Status RepairDB(const std::string& dbname, const DBOptions& db_options,
const std::vector<ColumnFamilyDescriptor>& column_families) {
ColumnFamilyOptions default_cf_opts;
Status status = GetDefaultCFOptions(column_families, &default_cf_opts);
if (!status.ok()) {
return status;
}
Repairer repairer(dbname, db_options, column_families, default_cf_opts,
ColumnFamilyOptions() /* unknown_cf_opts */,
false /* create_unknown_cfs */);
status = repairer.Run();
if (status.ok()) {
status = repairer.Close();
}
return status;
}
Status RepairDB(const std::string& dbname, const DBOptions& db_options,
const std::vector<ColumnFamilyDescriptor>& column_families,
const ColumnFamilyOptions& unknown_cf_opts) {
ColumnFamilyOptions default_cf_opts;
Status status = GetDefaultCFOptions(column_families, &default_cf_opts);
if (!status.ok()) {
return status;
}
Repairer repairer(dbname, db_options, column_families, default_cf_opts,
unknown_cf_opts, true /* create_unknown_cfs */);
status = repairer.Run();
if (status.ok()) {
status = repairer.Close();
}
return status;
}
Status RepairDB(const std::string& dbname, const Options& options) {
Options opts(options);
DBOptions db_options(opts);
ColumnFamilyOptions cf_options(opts);
Repairer repairer(dbname, db_options, {}, cf_options /* default_cf_opts */,
cf_options /* unknown_cf_opts */,
true /* create_unknown_cfs */);
Status status = repairer.Run();
if (status.ok()) {
status = repairer.Close();
}
return status;
}
} // namespace ROCKSDB_NAMESPACE
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