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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kStorage
#include "mongo/platform/basic.h"
#include "mongo/db/storage/remove_saver.h"
#include <boost/filesystem/operations.hpp>
#include <fstream>
#include <ios>
#include "mongo/db/service_context.h"
#include "mongo/db/storage/encryption_hooks.h"
#include "mongo/db/storage/storage_options.h"
#include "mongo/logv2/log.h"
#include "mongo/util/errno_util.h"
using std::ios_base;
using std::ofstream;
using std::string;
using std::stringstream;
namespace mongo {
RemoveSaver::RemoveSaver(const string& a,
const string& b,
const string& why,
std::unique_ptr<Storage> storage)
: _storage(std::move(storage)) {
static int NUM = 0;
_root = storageGlobalParams.dbpath;
if (a.size())
_root /= a;
if (b.size())
_root /= b;
verify(a.size() || b.size());
_file = _root;
stringstream ss;
ss << why << "." << terseCurrentTimeForFilename() << "." << NUM++ << ".bson";
_file /= ss.str();
auto encryptionHooks = EncryptionHooks::get(getGlobalServiceContext());
if (encryptionHooks->enabled()) {
_protector = encryptionHooks->getDataProtector();
_file += encryptionHooks->getProtectedPathSuffix();
}
}
RemoveSaver::~RemoveSaver() {
if (_protector && _out) {
auto encryptionHooks = EncryptionHooks::get(getGlobalServiceContext());
invariant(encryptionHooks->enabled());
size_t protectedSizeMax = encryptionHooks->additionalBytesForProtectedBuffer();
std::unique_ptr<uint8_t[]> protectedBuffer(new uint8_t[protectedSizeMax]);
size_t resultLen;
Status status = _protector->finalize(protectedBuffer.get(), protectedSizeMax, &resultLen);
if (!status.isOK()) {
LOGV2_FATAL(34350,
"Unable to finalize DataProtector while closing RemoveSaver: {error}",
"Unable to finalize DataProtector while closing RemoveSaver",
"error"_attr = redact(status));
}
_out->write(reinterpret_cast<const char*>(protectedBuffer.get()), resultLen);
if (_out->fail()) {
auto ec = lastSystemError();
LOGV2_FATAL(34351,
"Couldn't write finalized DataProtector data to: {file} for remove "
"saving: {error}",
"Couldn't write finalized DataProtector for remove saving",
"file"_attr = _file.generic_string(),
"error"_attr = redact(errorMessage(ec)));
}
protectedBuffer.reset(new uint8_t[protectedSizeMax]);
status = _protector->finalizeTag(protectedBuffer.get(), protectedSizeMax, &resultLen);
if (!status.isOK()) {
LOGV2_FATAL(
34352,
"Unable to get finalizeTag from DataProtector while closing RemoveSaver: {error}",
"Unable to get finalizeTag from DataProtector while closing RemoveSaver",
"error"_attr = redact(status));
}
if (resultLen != _protector->getNumberOfBytesReservedForTag()) {
LOGV2_FATAL(34353,
"Attempted to write tag of size {sizeBytes} when DataProtector only "
"reserved {reservedBytes} bytes",
"Attempted to write tag of larger size than DataProtector reserved size",
"sizeBytes"_attr = resultLen,
"reservedBytes"_attr = _protector->getNumberOfBytesReservedForTag());
}
_out->seekp(0);
_out->write(reinterpret_cast<const char*>(protectedBuffer.get()), resultLen);
if (_out->fail()) {
auto ec = lastSystemError();
LOGV2_FATAL(34354,
"Couldn't write finalizeTag from DataProtector to: {file} for "
"remove saving: {error}",
"Couldn't write finalizeTag from DataProtector for remove saving",
"file"_attr = _file.generic_string(),
"error"_attr = redact(errorMessage(ec)));
}
_storage->dumpBuffer();
}
}
Status RemoveSaver::goingToDelete(const BSONObj& o) {
if (!_out) {
_out = _storage->makeOstream(_file, _root);
if (_out->fail()) {
auto ec = lastSystemError();
string msg = str::stream() << "couldn't create file: " << _file.string()
<< " for remove saving: " << redact(errorMessage(ec));
LOGV2_ERROR(23734,
"Failed to create file for remove saving",
"file"_attr = _file.generic_string(),
"error"_attr = redact(errorMessage(ec)));
_out.reset();
_out = nullptr;
return Status(ErrorCodes::FileNotOpen, msg);
}
}
const uint8_t* data = reinterpret_cast<const uint8_t*>(o.objdata());
size_t dataSize = o.objsize();
std::unique_ptr<uint8_t[]> protectedBuffer;
if (_protector) {
auto encryptionHooks = EncryptionHooks::get(getGlobalServiceContext());
invariant(encryptionHooks->enabled());
size_t protectedSizeMax = dataSize + encryptionHooks->additionalBytesForProtectedBuffer();
protectedBuffer.reset(new uint8_t[protectedSizeMax]);
size_t resultLen;
Status status = _protector->protect(
data, dataSize, protectedBuffer.get(), protectedSizeMax, &resultLen);
if (!status.isOK()) {
return status;
}
data = protectedBuffer.get();
dataSize = resultLen;
}
_out->write(reinterpret_cast<const char*>(data), dataSize);
if (_out->fail()) {
auto errorStr = redact(errorMessage(lastSystemError()));
string msg = str::stream() << "couldn't write document to file: " << _file.string()
<< " for remove saving: " << errorStr;
LOGV2_ERROR(23735,
"Couldn't write document to file for remove saving",
"file"_attr = _file.generic_string(),
"error"_attr = errorStr);
return Status(ErrorCodes::OperationFailed, msg);
}
return Status::OK();
}
std::unique_ptr<std::ostream> RemoveSaver::Storage::makeOstream(
const boost::filesystem::path& file, const boost::filesystem::path& root) {
// We don't expect to ever pass "" to create_directories below, but catch
// this anyway as per SERVER-26412.
invariant(!root.empty());
boost::filesystem::create_directories(root);
return std::make_unique<std::ofstream>(file.string().c_str(),
std::ios_base::out | std::ios_base::binary);
}
} // namespace mongo
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