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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.
#include "util/file_checksum_helper.h"
#include <unordered_set>
#include "db/log_reader.h"
#include "db/version_edit.h"
#include "db/version_edit_handler.h"
#include "file/sequence_file_reader.h"
#include "rocksdb/utilities/customizable_util.h"
namespace ROCKSDB_NAMESPACE {
void FileChecksumListImpl::reset() { checksum_map_.clear(); }
size_t FileChecksumListImpl::size() const { return checksum_map_.size(); }
Status FileChecksumListImpl::GetAllFileChecksums(
std::vector<uint64_t>* file_numbers, std::vector<std::string>* checksums,
std::vector<std::string>* checksum_func_names) {
if (file_numbers == nullptr || checksums == nullptr ||
checksum_func_names == nullptr) {
return Status::InvalidArgument("Pointer has not been initiated");
}
for (auto i : checksum_map_) {
file_numbers->push_back(i.first);
checksums->push_back(i.second.first);
checksum_func_names->push_back(i.second.second);
}
return Status::OK();
}
Status FileChecksumListImpl::SearchOneFileChecksum(
uint64_t file_number, std::string* checksum,
std::string* checksum_func_name) {
if (checksum == nullptr || checksum_func_name == nullptr) {
return Status::InvalidArgument("Pointer has not been initiated");
}
auto it = checksum_map_.find(file_number);
if (it == checksum_map_.end()) {
return Status::NotFound();
} else {
*checksum = it->second.first;
*checksum_func_name = it->second.second;
}
return Status::OK();
}
Status FileChecksumListImpl::InsertOneFileChecksum(
uint64_t file_number, const std::string& checksum,
const std::string& checksum_func_name) {
auto it = checksum_map_.find(file_number);
if (it == checksum_map_.end()) {
checksum_map_.insert(std::make_pair(
file_number, std::make_pair(checksum, checksum_func_name)));
} else {
it->second.first = checksum;
it->second.second = checksum_func_name;
}
return Status::OK();
}
Status FileChecksumListImpl::RemoveOneFileChecksum(uint64_t file_number) {
auto it = checksum_map_.find(file_number);
if (it == checksum_map_.end()) {
return Status::NotFound();
} else {
checksum_map_.erase(it);
}
return Status::OK();
}
FileChecksumList* NewFileChecksumList() {
FileChecksumListImpl* checksum_list = new FileChecksumListImpl();
return checksum_list;
}
std::shared_ptr<FileChecksumGenFactory> GetFileChecksumGenCrc32cFactory() {
static std::shared_ptr<FileChecksumGenFactory> default_crc32c_gen_factory(
new FileChecksumGenCrc32cFactory());
return default_crc32c_gen_factory;
}
Status GetFileChecksumsFromManifest(Env* src_env, const std::string& abs_path,
uint64_t manifest_file_size,
FileChecksumList* checksum_list) {
if (checksum_list == nullptr) {
return Status::InvalidArgument("checksum_list is nullptr");
}
assert(checksum_list);
checksum_list->reset();
Status s;
std::unique_ptr<SequentialFileReader> file_reader;
{
std::unique_ptr<FSSequentialFile> file;
const std::shared_ptr<FileSystem>& fs = src_env->GetFileSystem();
s = fs->NewSequentialFile(abs_path,
fs->OptimizeForManifestRead(FileOptions()), &file,
nullptr /* dbg */);
if (!s.ok()) {
return s;
}
file_reader.reset(new SequentialFileReader(std::move(file), abs_path));
}
struct LogReporter : public log::Reader::Reporter {
Status* status_ptr;
virtual void Corruption(size_t /*bytes*/, const Status& st) override {
if (status_ptr->ok()) {
*status_ptr = st;
}
}
} reporter;
reporter.status_ptr = &s;
log::Reader reader(nullptr, std::move(file_reader), &reporter,
true /* checksum */, 0 /* log_number */);
FileChecksumRetriever retriever(manifest_file_size, *checksum_list);
retriever.Iterate(reader, &s);
assert(!retriever.status().ok() ||
manifest_file_size == std::numeric_limits<uint64_t>::max() ||
reader.LastRecordEnd() == manifest_file_size);
return retriever.status();
}
#ifndef ROCKSDB_LITE
namespace {
static int RegisterFileChecksumGenFactories(ObjectLibrary& library,
const std::string& /*arg*/) {
library.AddFactory<FileChecksumGenFactory>(
FileChecksumGenCrc32cFactory::kClassName(),
[](const std::string& /*uri*/,
std::unique_ptr<FileChecksumGenFactory>* guard,
std::string* /* errmsg */) {
guard->reset(new FileChecksumGenCrc32cFactory());
return guard->get();
});
return 1;
}
} // namespace
#endif // !ROCKSDB_LITE
Status FileChecksumGenFactory::CreateFromString(
const ConfigOptions& options, const std::string& value,
std::shared_ptr<FileChecksumGenFactory>* result) {
#ifndef ROCKSDB_LITE
static std::once_flag once;
std::call_once(once, [&]() {
RegisterFileChecksumGenFactories(*(ObjectLibrary::Default().get()), "");
});
#endif // ROCKSDB_LITE
if (value == FileChecksumGenCrc32cFactory::kClassName()) {
*result = GetFileChecksumGenCrc32cFactory();
return Status::OK();
} else {
Status s = LoadSharedObject<FileChecksumGenFactory>(options, value, nullptr,
result);
return s;
}
}
} // namespace ROCKSDB_NAMESPACE
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