mirror of https://github.com/facebook/rocksdb.git
577 lines
23 KiB
C++
577 lines
23 KiB
C++
// 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).
|
|
#include "table/meta_blocks.h"
|
|
|
|
#include <map>
|
|
#include <string>
|
|
|
|
#include "block_fetcher.h"
|
|
#include "db/table_properties_collector.h"
|
|
#include "file/random_access_file_reader.h"
|
|
#include "logging/logging.h"
|
|
#include "rocksdb/options.h"
|
|
#include "rocksdb/table.h"
|
|
#include "rocksdb/table_properties.h"
|
|
#include "table/block_based/block.h"
|
|
#include "table/block_based/reader_common.h"
|
|
#include "table/format.h"
|
|
#include "table/internal_iterator.h"
|
|
#include "table/persistent_cache_helper.h"
|
|
#include "table/sst_file_writer_collectors.h"
|
|
#include "table/table_properties_internal.h"
|
|
#include "test_util/sync_point.h"
|
|
#include "util/coding.h"
|
|
|
|
namespace ROCKSDB_NAMESPACE {
|
|
|
|
const std::string kPropertiesBlockName = "rocksdb.properties";
|
|
// NB: only used with format_version >= 6
|
|
const std::string kIndexBlockName = "rocksdb.index";
|
|
// Old property block name for backward compatibility
|
|
const std::string kPropertiesBlockOldName = "rocksdb.stats";
|
|
const std::string kCompressionDictBlockName = "rocksdb.compression_dict";
|
|
const std::string kRangeDelBlockName = "rocksdb.range_del";
|
|
|
|
MetaIndexBuilder::MetaIndexBuilder()
|
|
: meta_index_block_(new BlockBuilder(1 /* restart interval */)) {}
|
|
|
|
void MetaIndexBuilder::Add(const std::string& key, const BlockHandle& handle) {
|
|
std::string handle_encoding;
|
|
handle.EncodeTo(&handle_encoding);
|
|
meta_block_handles_.insert({key, handle_encoding});
|
|
}
|
|
|
|
Slice MetaIndexBuilder::Finish() {
|
|
for (const auto& metablock : meta_block_handles_) {
|
|
meta_index_block_->Add(metablock.first, metablock.second);
|
|
}
|
|
return meta_index_block_->Finish();
|
|
}
|
|
|
|
// Property block will be read sequentially and cached in a heap located
|
|
// object, so there's no need for restart points. Thus we set the restart
|
|
// interval to infinity to save space.
|
|
PropertyBlockBuilder::PropertyBlockBuilder()
|
|
: properties_block_(new BlockBuilder(
|
|
std::numeric_limits<int32_t>::max() /* restart interval */)) {}
|
|
|
|
void PropertyBlockBuilder::Add(const std::string& name,
|
|
const std::string& val) {
|
|
props_.insert({name, val});
|
|
}
|
|
|
|
void PropertyBlockBuilder::Add(const std::string& name, uint64_t val) {
|
|
assert(props_.find(name) == props_.end());
|
|
|
|
std::string dst;
|
|
PutVarint64(&dst, val);
|
|
|
|
Add(name, dst);
|
|
}
|
|
|
|
void PropertyBlockBuilder::Add(
|
|
const UserCollectedProperties& user_collected_properties) {
|
|
for (const auto& prop : user_collected_properties) {
|
|
Add(prop.first, prop.second);
|
|
}
|
|
}
|
|
|
|
void PropertyBlockBuilder::AddTableProperty(const TableProperties& props) {
|
|
TEST_SYNC_POINT_CALLBACK("PropertyBlockBuilder::AddTableProperty:Start",
|
|
const_cast<TableProperties*>(&props));
|
|
|
|
Add(TablePropertiesNames::kOriginalFileNumber, props.orig_file_number);
|
|
Add(TablePropertiesNames::kRawKeySize, props.raw_key_size);
|
|
Add(TablePropertiesNames::kRawValueSize, props.raw_value_size);
|
|
Add(TablePropertiesNames::kDataSize, props.data_size);
|
|
Add(TablePropertiesNames::kIndexSize, props.index_size);
|
|
if (props.index_partitions != 0) {
|
|
Add(TablePropertiesNames::kIndexPartitions, props.index_partitions);
|
|
Add(TablePropertiesNames::kTopLevelIndexSize, props.top_level_index_size);
|
|
}
|
|
Add(TablePropertiesNames::kIndexKeyIsUserKey, props.index_key_is_user_key);
|
|
Add(TablePropertiesNames::kIndexValueIsDeltaEncoded,
|
|
props.index_value_is_delta_encoded);
|
|
Add(TablePropertiesNames::kNumEntries, props.num_entries);
|
|
Add(TablePropertiesNames::kNumFilterEntries, props.num_filter_entries);
|
|
Add(TablePropertiesNames::kDeletedKeys, props.num_deletions);
|
|
Add(TablePropertiesNames::kMergeOperands, props.num_merge_operands);
|
|
Add(TablePropertiesNames::kNumRangeDeletions, props.num_range_deletions);
|
|
Add(TablePropertiesNames::kNumDataBlocks, props.num_data_blocks);
|
|
Add(TablePropertiesNames::kFilterSize, props.filter_size);
|
|
Add(TablePropertiesNames::kFormatVersion, props.format_version);
|
|
Add(TablePropertiesNames::kFixedKeyLen, props.fixed_key_len);
|
|
Add(TablePropertiesNames::kColumnFamilyId, props.column_family_id);
|
|
Add(TablePropertiesNames::kCreationTime, props.creation_time);
|
|
Add(TablePropertiesNames::kOldestKeyTime, props.oldest_key_time);
|
|
if (props.file_creation_time > 0) {
|
|
Add(TablePropertiesNames::kFileCreationTime, props.file_creation_time);
|
|
}
|
|
if (props.slow_compression_estimated_data_size > 0) {
|
|
Add(TablePropertiesNames::kSlowCompressionEstimatedDataSize,
|
|
props.slow_compression_estimated_data_size);
|
|
}
|
|
if (props.fast_compression_estimated_data_size > 0) {
|
|
Add(TablePropertiesNames::kFastCompressionEstimatedDataSize,
|
|
props.fast_compression_estimated_data_size);
|
|
}
|
|
Add(TablePropertiesNames::kTailStartOffset, props.tail_start_offset);
|
|
if (props.user_defined_timestamps_persisted == 0) {
|
|
Add(TablePropertiesNames::kUserDefinedTimestampsPersisted,
|
|
props.user_defined_timestamps_persisted);
|
|
}
|
|
if (!props.db_id.empty()) {
|
|
Add(TablePropertiesNames::kDbId, props.db_id);
|
|
}
|
|
if (!props.db_session_id.empty()) {
|
|
Add(TablePropertiesNames::kDbSessionId, props.db_session_id);
|
|
}
|
|
if (!props.db_host_id.empty()) {
|
|
Add(TablePropertiesNames::kDbHostId, props.db_host_id);
|
|
}
|
|
|
|
if (!props.filter_policy_name.empty()) {
|
|
Add(TablePropertiesNames::kFilterPolicy, props.filter_policy_name);
|
|
}
|
|
if (!props.comparator_name.empty()) {
|
|
Add(TablePropertiesNames::kComparator, props.comparator_name);
|
|
}
|
|
|
|
if (!props.merge_operator_name.empty()) {
|
|
Add(TablePropertiesNames::kMergeOperator, props.merge_operator_name);
|
|
}
|
|
if (!props.prefix_extractor_name.empty()) {
|
|
Add(TablePropertiesNames::kPrefixExtractorName,
|
|
props.prefix_extractor_name);
|
|
}
|
|
if (!props.property_collectors_names.empty()) {
|
|
Add(TablePropertiesNames::kPropertyCollectors,
|
|
props.property_collectors_names);
|
|
}
|
|
if (!props.column_family_name.empty()) {
|
|
Add(TablePropertiesNames::kColumnFamilyName, props.column_family_name);
|
|
}
|
|
|
|
if (!props.compression_name.empty()) {
|
|
Add(TablePropertiesNames::kCompression, props.compression_name);
|
|
}
|
|
if (!props.compression_options.empty()) {
|
|
Add(TablePropertiesNames::kCompressionOptions, props.compression_options);
|
|
}
|
|
if (!props.seqno_to_time_mapping.empty()) {
|
|
Add(TablePropertiesNames::kSequenceNumberTimeMapping,
|
|
props.seqno_to_time_mapping);
|
|
}
|
|
}
|
|
|
|
Slice PropertyBlockBuilder::Finish() {
|
|
for (const auto& prop : props_) {
|
|
properties_block_->Add(prop.first, prop.second);
|
|
}
|
|
|
|
return properties_block_->Finish();
|
|
}
|
|
|
|
void LogPropertiesCollectionError(Logger* info_log, const std::string& method,
|
|
const std::string& name) {
|
|
assert(method == "Add" || method == "Finish");
|
|
|
|
std::string msg =
|
|
"Encountered error when calling TablePropertiesCollector::" + method +
|
|
"() with collector name: " + name;
|
|
ROCKS_LOG_ERROR(info_log, "%s", msg.c_str());
|
|
}
|
|
|
|
bool NotifyCollectTableCollectorsOnAdd(
|
|
const Slice& key, const Slice& value, uint64_t file_size,
|
|
const std::vector<std::unique_ptr<IntTblPropCollector>>& collectors,
|
|
Logger* info_log) {
|
|
bool all_succeeded = true;
|
|
for (auto& collector : collectors) {
|
|
Status s = collector->InternalAdd(key, value, file_size);
|
|
all_succeeded = all_succeeded && s.ok();
|
|
if (!s.ok()) {
|
|
LogPropertiesCollectionError(info_log, "Add" /* method */,
|
|
collector->Name());
|
|
}
|
|
}
|
|
return all_succeeded;
|
|
}
|
|
|
|
void NotifyCollectTableCollectorsOnBlockAdd(
|
|
const std::vector<std::unique_ptr<IntTblPropCollector>>& collectors,
|
|
const uint64_t block_uncomp_bytes,
|
|
const uint64_t block_compressed_bytes_fast,
|
|
const uint64_t block_compressed_bytes_slow) {
|
|
for (auto& collector : collectors) {
|
|
collector->BlockAdd(block_uncomp_bytes, block_compressed_bytes_fast,
|
|
block_compressed_bytes_slow);
|
|
}
|
|
}
|
|
|
|
bool NotifyCollectTableCollectorsOnFinish(
|
|
const std::vector<std::unique_ptr<IntTblPropCollector>>& collectors,
|
|
Logger* info_log, PropertyBlockBuilder* builder,
|
|
UserCollectedProperties& user_collected_properties,
|
|
UserCollectedProperties& readable_properties) {
|
|
bool all_succeeded = true;
|
|
for (auto& collector : collectors) {
|
|
Status s = collector->Finish(&user_collected_properties);
|
|
if (s.ok()) {
|
|
for (const auto& prop : collector->GetReadableProperties()) {
|
|
readable_properties.insert(prop);
|
|
}
|
|
builder->Add(user_collected_properties);
|
|
} else {
|
|
LogPropertiesCollectionError(info_log, "Finish" /* method */,
|
|
collector->Name());
|
|
if (all_succeeded) {
|
|
all_succeeded = false;
|
|
}
|
|
}
|
|
}
|
|
return all_succeeded;
|
|
}
|
|
|
|
// FIXME: should be a parameter for reading table properties to use persistent
|
|
// cache?
|
|
Status ReadTablePropertiesHelper(
|
|
const ReadOptions& ro, const BlockHandle& handle,
|
|
RandomAccessFileReader* file, FilePrefetchBuffer* prefetch_buffer,
|
|
const Footer& footer, const ImmutableOptions& ioptions,
|
|
std::unique_ptr<TableProperties>* table_properties,
|
|
MemoryAllocator* memory_allocator) {
|
|
assert(table_properties);
|
|
|
|
// If this is an external SST file ingested with write_global_seqno set to
|
|
// true, then we expect the checksum mismatch because checksum was written
|
|
// by SstFileWriter, but its global seqno in the properties block may have
|
|
// been changed during ingestion. For this reason, we initially read
|
|
// and process without checksum verification, then later try checksum
|
|
// verification so that if it fails, we can copy to a temporary buffer with
|
|
// global seqno set to its original value, i.e. 0, and attempt checksum
|
|
// verification again.
|
|
ReadOptions modified_ro = ro;
|
|
modified_ro.verify_checksums = false;
|
|
BlockContents block_contents;
|
|
BlockFetcher block_fetcher(file, prefetch_buffer, footer, modified_ro, handle,
|
|
&block_contents, ioptions, false /* decompress */,
|
|
false /*maybe_compressed*/, BlockType::kProperties,
|
|
UncompressionDict::GetEmptyDict(),
|
|
PersistentCacheOptions::kEmpty, memory_allocator);
|
|
Status s = block_fetcher.ReadBlockContents();
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
|
|
// Unfortunately, Block::size() might not equal block_contents.data.size(),
|
|
// and Block hides block_contents
|
|
uint64_t block_size = block_contents.data.size();
|
|
Block properties_block(std::move(block_contents));
|
|
std::unique_ptr<MetaBlockIter> iter(properties_block.NewMetaIterator());
|
|
|
|
std::unique_ptr<TableProperties> new_table_properties{new TableProperties};
|
|
// All pre-defined properties of type uint64_t
|
|
std::unordered_map<std::string, uint64_t*> predefined_uint64_properties = {
|
|
{TablePropertiesNames::kOriginalFileNumber,
|
|
&new_table_properties->orig_file_number},
|
|
{TablePropertiesNames::kDataSize, &new_table_properties->data_size},
|
|
{TablePropertiesNames::kIndexSize, &new_table_properties->index_size},
|
|
{TablePropertiesNames::kIndexPartitions,
|
|
&new_table_properties->index_partitions},
|
|
{TablePropertiesNames::kTopLevelIndexSize,
|
|
&new_table_properties->top_level_index_size},
|
|
{TablePropertiesNames::kIndexKeyIsUserKey,
|
|
&new_table_properties->index_key_is_user_key},
|
|
{TablePropertiesNames::kIndexValueIsDeltaEncoded,
|
|
&new_table_properties->index_value_is_delta_encoded},
|
|
{TablePropertiesNames::kFilterSize, &new_table_properties->filter_size},
|
|
{TablePropertiesNames::kRawKeySize, &new_table_properties->raw_key_size},
|
|
{TablePropertiesNames::kRawValueSize,
|
|
&new_table_properties->raw_value_size},
|
|
{TablePropertiesNames::kNumDataBlocks,
|
|
&new_table_properties->num_data_blocks},
|
|
{TablePropertiesNames::kNumEntries, &new_table_properties->num_entries},
|
|
{TablePropertiesNames::kNumFilterEntries,
|
|
&new_table_properties->num_filter_entries},
|
|
{TablePropertiesNames::kDeletedKeys,
|
|
&new_table_properties->num_deletions},
|
|
{TablePropertiesNames::kMergeOperands,
|
|
&new_table_properties->num_merge_operands},
|
|
{TablePropertiesNames::kNumRangeDeletions,
|
|
&new_table_properties->num_range_deletions},
|
|
{TablePropertiesNames::kFormatVersion,
|
|
&new_table_properties->format_version},
|
|
{TablePropertiesNames::kFixedKeyLen,
|
|
&new_table_properties->fixed_key_len},
|
|
{TablePropertiesNames::kColumnFamilyId,
|
|
&new_table_properties->column_family_id},
|
|
{TablePropertiesNames::kCreationTime,
|
|
&new_table_properties->creation_time},
|
|
{TablePropertiesNames::kOldestKeyTime,
|
|
&new_table_properties->oldest_key_time},
|
|
{TablePropertiesNames::kFileCreationTime,
|
|
&new_table_properties->file_creation_time},
|
|
{TablePropertiesNames::kSlowCompressionEstimatedDataSize,
|
|
&new_table_properties->slow_compression_estimated_data_size},
|
|
{TablePropertiesNames::kFastCompressionEstimatedDataSize,
|
|
&new_table_properties->fast_compression_estimated_data_size},
|
|
{TablePropertiesNames::kTailStartOffset,
|
|
&new_table_properties->tail_start_offset},
|
|
{TablePropertiesNames::kUserDefinedTimestampsPersisted,
|
|
&new_table_properties->user_defined_timestamps_persisted},
|
|
};
|
|
|
|
std::string last_key;
|
|
for (iter->SeekToFirst(); iter->Valid(); iter->Next()) {
|
|
s = iter->status();
|
|
if (!s.ok()) {
|
|
break;
|
|
}
|
|
|
|
auto key = iter->key().ToString();
|
|
// properties block should be strictly sorted with no duplicate key.
|
|
if (!last_key.empty() &&
|
|
BytewiseComparator()->Compare(key, last_key) <= 0) {
|
|
s = Status::Corruption("properties unsorted");
|
|
break;
|
|
}
|
|
last_key = key;
|
|
|
|
auto raw_val = iter->value();
|
|
auto pos = predefined_uint64_properties.find(key);
|
|
|
|
if (key == ExternalSstFilePropertyNames::kGlobalSeqno) {
|
|
new_table_properties->external_sst_file_global_seqno_offset =
|
|
handle.offset() + iter->ValueOffset();
|
|
}
|
|
|
|
if (pos != predefined_uint64_properties.end()) {
|
|
if (key == TablePropertiesNames::kDeletedKeys ||
|
|
key == TablePropertiesNames::kMergeOperands) {
|
|
// Insert in user-collected properties for API backwards compatibility
|
|
new_table_properties->user_collected_properties.insert(
|
|
{key, raw_val.ToString()});
|
|
}
|
|
// handle predefined rocksdb properties
|
|
uint64_t val;
|
|
if (!GetVarint64(&raw_val, &val)) {
|
|
// skip malformed value
|
|
auto error_msg =
|
|
"Detect malformed value in properties meta-block:"
|
|
"\tkey: " +
|
|
key + "\tval: " + raw_val.ToString();
|
|
ROCKS_LOG_ERROR(ioptions.logger, "%s", error_msg.c_str());
|
|
continue;
|
|
}
|
|
*(pos->second) = val;
|
|
} else if (key == TablePropertiesNames::kDbId) {
|
|
new_table_properties->db_id = raw_val.ToString();
|
|
} else if (key == TablePropertiesNames::kDbSessionId) {
|
|
new_table_properties->db_session_id = raw_val.ToString();
|
|
} else if (key == TablePropertiesNames::kDbHostId) {
|
|
new_table_properties->db_host_id = raw_val.ToString();
|
|
} else if (key == TablePropertiesNames::kFilterPolicy) {
|
|
new_table_properties->filter_policy_name = raw_val.ToString();
|
|
} else if (key == TablePropertiesNames::kColumnFamilyName) {
|
|
new_table_properties->column_family_name = raw_val.ToString();
|
|
} else if (key == TablePropertiesNames::kComparator) {
|
|
new_table_properties->comparator_name = raw_val.ToString();
|
|
} else if (key == TablePropertiesNames::kMergeOperator) {
|
|
new_table_properties->merge_operator_name = raw_val.ToString();
|
|
} else if (key == TablePropertiesNames::kPrefixExtractorName) {
|
|
new_table_properties->prefix_extractor_name = raw_val.ToString();
|
|
} else if (key == TablePropertiesNames::kPropertyCollectors) {
|
|
new_table_properties->property_collectors_names = raw_val.ToString();
|
|
} else if (key == TablePropertiesNames::kCompression) {
|
|
new_table_properties->compression_name = raw_val.ToString();
|
|
} else if (key == TablePropertiesNames::kCompressionOptions) {
|
|
new_table_properties->compression_options = raw_val.ToString();
|
|
} else if (key == TablePropertiesNames::kSequenceNumberTimeMapping) {
|
|
new_table_properties->seqno_to_time_mapping = raw_val.ToString();
|
|
} else {
|
|
// handle user-collected properties
|
|
new_table_properties->user_collected_properties.insert(
|
|
{key, raw_val.ToString()});
|
|
}
|
|
}
|
|
|
|
// Modified version of BlockFetcher checksum verification
|
|
// (See write_global_seqno comment above)
|
|
if (s.ok() && footer.GetBlockTrailerSize() > 0) {
|
|
s = VerifyBlockChecksum(footer, properties_block.data(), block_size,
|
|
file->file_name(), handle.offset());
|
|
if (s.IsCorruption()) {
|
|
if (new_table_properties->external_sst_file_global_seqno_offset != 0) {
|
|
std::string tmp_buf(properties_block.data(),
|
|
block_fetcher.GetBlockSizeWithTrailer());
|
|
uint64_t global_seqno_offset =
|
|
new_table_properties->external_sst_file_global_seqno_offset -
|
|
handle.offset();
|
|
EncodeFixed64(&tmp_buf[static_cast<size_t>(global_seqno_offset)], 0);
|
|
s = VerifyBlockChecksum(footer, tmp_buf.data(), block_size,
|
|
file->file_name(), handle.offset());
|
|
}
|
|
}
|
|
}
|
|
|
|
if (s.ok()) {
|
|
*table_properties = std::move(new_table_properties);
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
Status ReadTableProperties(RandomAccessFileReader* file, uint64_t file_size,
|
|
uint64_t table_magic_number,
|
|
const ImmutableOptions& ioptions,
|
|
const ReadOptions& read_options,
|
|
std::unique_ptr<TableProperties>* properties,
|
|
MemoryAllocator* memory_allocator,
|
|
FilePrefetchBuffer* prefetch_buffer) {
|
|
BlockHandle block_handle;
|
|
Footer footer;
|
|
Status s =
|
|
FindMetaBlockInFile(file, file_size, table_magic_number, ioptions,
|
|
read_options, kPropertiesBlockName, &block_handle,
|
|
memory_allocator, prefetch_buffer, &footer);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
|
|
if (!block_handle.IsNull()) {
|
|
s = ReadTablePropertiesHelper(read_options, block_handle, file,
|
|
prefetch_buffer, footer, ioptions, properties,
|
|
memory_allocator);
|
|
} else {
|
|
s = Status::NotFound();
|
|
}
|
|
return s;
|
|
}
|
|
|
|
Status FindOptionalMetaBlock(InternalIterator* meta_index_iter,
|
|
const std::string& meta_block_name,
|
|
BlockHandle* block_handle) {
|
|
assert(block_handle != nullptr);
|
|
meta_index_iter->Seek(meta_block_name);
|
|
if (meta_index_iter->status().ok()) {
|
|
if (meta_index_iter->Valid() && meta_index_iter->key() == meta_block_name) {
|
|
Slice v = meta_index_iter->value();
|
|
return block_handle->DecodeFrom(&v);
|
|
} else if (meta_block_name == kPropertiesBlockName) {
|
|
// Have to try old name for compatibility
|
|
meta_index_iter->Seek(kPropertiesBlockOldName);
|
|
if (meta_index_iter->status().ok() && meta_index_iter->Valid() &&
|
|
meta_index_iter->key() == kPropertiesBlockOldName) {
|
|
Slice v = meta_index_iter->value();
|
|
return block_handle->DecodeFrom(&v);
|
|
}
|
|
}
|
|
}
|
|
// else
|
|
*block_handle = BlockHandle::NullBlockHandle();
|
|
return meta_index_iter->status();
|
|
}
|
|
|
|
Status FindMetaBlock(InternalIterator* meta_index_iter,
|
|
const std::string& meta_block_name,
|
|
BlockHandle* block_handle) {
|
|
Status s =
|
|
FindOptionalMetaBlock(meta_index_iter, meta_block_name, block_handle);
|
|
if (s.ok() && block_handle->IsNull()) {
|
|
return Status::Corruption("Cannot find the meta block", meta_block_name);
|
|
} else {
|
|
return s;
|
|
}
|
|
}
|
|
|
|
Status ReadMetaIndexBlockInFile(RandomAccessFileReader* file,
|
|
uint64_t file_size, uint64_t table_magic_number,
|
|
const ImmutableOptions& ioptions,
|
|
const ReadOptions& read_options,
|
|
BlockContents* metaindex_contents,
|
|
MemoryAllocator* memory_allocator,
|
|
FilePrefetchBuffer* prefetch_buffer,
|
|
Footer* footer_out) {
|
|
Footer footer;
|
|
IOOptions opts;
|
|
Status s;
|
|
s = file->PrepareIOOptions(read_options, opts);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
s = ReadFooterFromFile(opts, file, *ioptions.fs, prefetch_buffer, file_size,
|
|
&footer, table_magic_number);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
if (footer_out) {
|
|
*footer_out = footer;
|
|
}
|
|
|
|
auto metaindex_handle = footer.metaindex_handle();
|
|
return BlockFetcher(file, prefetch_buffer, footer, read_options,
|
|
metaindex_handle, metaindex_contents, ioptions,
|
|
false /* do decompression */, false /*maybe_compressed*/,
|
|
BlockType::kMetaIndex, UncompressionDict::GetEmptyDict(),
|
|
PersistentCacheOptions::kEmpty, memory_allocator)
|
|
.ReadBlockContents();
|
|
}
|
|
|
|
Status FindMetaBlockInFile(
|
|
RandomAccessFileReader* file, uint64_t file_size,
|
|
uint64_t table_magic_number, const ImmutableOptions& ioptions,
|
|
const ReadOptions& read_options, const std::string& meta_block_name,
|
|
BlockHandle* block_handle, MemoryAllocator* memory_allocator,
|
|
FilePrefetchBuffer* prefetch_buffer, Footer* footer_out) {
|
|
BlockContents metaindex_contents;
|
|
auto s = ReadMetaIndexBlockInFile(
|
|
file, file_size, table_magic_number, ioptions, read_options,
|
|
&metaindex_contents, memory_allocator, prefetch_buffer, footer_out);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
// meta blocks are never compressed. Need to add uncompress logic if we are to
|
|
// compress it.
|
|
Block metaindex_block(std::move(metaindex_contents));
|
|
|
|
std::unique_ptr<InternalIterator> meta_iter;
|
|
meta_iter.reset(metaindex_block.NewMetaIterator());
|
|
|
|
return FindMetaBlock(meta_iter.get(), meta_block_name, block_handle);
|
|
}
|
|
|
|
Status ReadMetaBlock(RandomAccessFileReader* file,
|
|
FilePrefetchBuffer* prefetch_buffer, uint64_t file_size,
|
|
uint64_t table_magic_number,
|
|
const ImmutableOptions& ioptions,
|
|
const ReadOptions& read_options,
|
|
const std::string& meta_block_name, BlockType block_type,
|
|
BlockContents* contents,
|
|
MemoryAllocator* memory_allocator) {
|
|
// TableProperties requires special handling because of checksum issues.
|
|
// Call ReadTableProperties instead for that case.
|
|
assert(block_type != BlockType::kProperties);
|
|
|
|
BlockHandle block_handle;
|
|
Footer footer;
|
|
Status status =
|
|
FindMetaBlockInFile(file, file_size, table_magic_number, ioptions,
|
|
read_options, meta_block_name, &block_handle,
|
|
memory_allocator, prefetch_buffer, &footer);
|
|
if (!status.ok()) {
|
|
return status;
|
|
}
|
|
|
|
return BlockFetcher(file, prefetch_buffer, footer, read_options, block_handle,
|
|
contents, ioptions, false /* decompress */,
|
|
false /*maybe_compressed*/, block_type,
|
|
UncompressionDict::GetEmptyDict(),
|
|
PersistentCacheOptions::kEmpty, memory_allocator)
|
|
.ReadBlockContents();
|
|
}
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|