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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "storage/browser/file_system/quota/quota_backend_impl.h"
#include <stdint.h>
#include <algorithm>
#include <string>
#include <utility>
#include "base/check_op.h"
#include "base/files/file_error_or.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/numerics/safe_conversions.h"
#include "base/task/sequenced_task_runner.h"
#include "base/types/expected_macros.h"
#include "storage/browser/file_system/file_system_usage_cache.h"
#include "storage/browser/quota/quota_client_type.h"
#include "storage/browser/quota/quota_manager_proxy.h"
#include "storage/common/file_system/file_system_util.h"
#include "third_party/blink/public/common/storage_key/storage_key.h"
#include "url/origin.h"
namespace storage {
QuotaBackendImpl::QuotaBackendImpl(
scoped_refptr<base::SequencedTaskRunner> file_task_runner,
ObfuscatedFileUtil* obfuscated_file_util,
FileSystemUsageCache* file_system_usage_cache,
scoped_refptr<QuotaManagerProxy> quota_manager_proxy)
: file_task_runner_(std::move(file_task_runner)),
obfuscated_file_util_(obfuscated_file_util),
file_system_usage_cache_(file_system_usage_cache),
quota_manager_proxy_(std::move(quota_manager_proxy)) {}
QuotaBackendImpl::~QuotaBackendImpl() = default;
void QuotaBackendImpl::ReserveQuota(const url::Origin& origin,
FileSystemType type,
int64_t delta,
ReserveQuotaCallback callback) {
DCHECK(file_task_runner_->RunsTasksInCurrentSequence());
DCHECK(!origin.opaque());
if (!delta) {
std::move(callback).Run(base::File::FILE_OK, 0);
return;
}
DCHECK(quota_manager_proxy_.get());
quota_manager_proxy_->GetUsageAndQuota(
blink::StorageKey::CreateFirstParty(origin), file_task_runner_,
base::BindOnce(&QuotaBackendImpl::DidGetUsageAndQuotaForReserveQuota,
weak_ptr_factory_.GetWeakPtr(),
QuotaReservationInfo(origin, type, delta),
std::move(callback)));
}
void QuotaBackendImpl::ReleaseReservedQuota(const url::Origin& origin,
FileSystemType type,
int64_t size) {
DCHECK(file_task_runner_->RunsTasksInCurrentSequence());
DCHECK(!origin.opaque());
DCHECK_LE(0, size);
if (!size)
return;
ReserveQuotaInternal(QuotaReservationInfo(origin, type, -size));
}
void QuotaBackendImpl::CommitQuotaUsage(const url::Origin& origin,
FileSystemType type,
int64_t delta) {
DCHECK(file_task_runner_->RunsTasksInCurrentSequence());
DCHECK(!origin.opaque());
if (!delta)
return;
ReserveQuotaInternal(QuotaReservationInfo(origin, type, delta));
ASSIGN_OR_RETURN(base::FilePath path, GetUsageCachePath(origin, type),
[](auto) {});
bool result = file_system_usage_cache_->AtomicUpdateUsageByDelta(
std::move(path), delta);
DCHECK(result);
}
void QuotaBackendImpl::IncrementDirtyCount(const url::Origin& origin,
FileSystemType type) {
DCHECK(file_task_runner_->RunsTasksInCurrentSequence());
DCHECK(!origin.opaque());
ASSIGN_OR_RETURN(base::FilePath path, GetUsageCachePath(origin, type),
[](auto) {});
DCHECK(file_system_usage_cache_);
file_system_usage_cache_->IncrementDirty(std::move(path));
}
void QuotaBackendImpl::DecrementDirtyCount(const url::Origin& origin,
FileSystemType type) {
DCHECK(file_task_runner_->RunsTasksInCurrentSequence());
DCHECK(!origin.opaque());
ASSIGN_OR_RETURN(base::FilePath path, GetUsageCachePath(origin, type),
[](auto) {});
DCHECK(file_system_usage_cache_);
file_system_usage_cache_->DecrementDirty(std::move(path));
}
void QuotaBackendImpl::DidGetUsageAndQuotaForReserveQuota(
const QuotaReservationInfo& info,
ReserveQuotaCallback callback,
blink::mojom::QuotaStatusCode status,
int64_t usage,
int64_t quota) {
DCHECK(file_task_runner_->RunsTasksInCurrentSequence());
DCHECK(!info.origin.opaque());
DCHECK_LE(0, usage);
DCHECK_LE(0, quota);
if (status != blink::mojom::QuotaStatusCode::kOk) {
std::move(callback).Run(base::File::FILE_ERROR_FAILED, 0);
return;
}
QuotaReservationInfo normalized_info = info;
if (info.delta > 0) {
int64_t new_usage = base::saturated_cast<int64_t>(
usage + static_cast<uint64_t>(info.delta));
if (quota < new_usage)
new_usage = quota;
normalized_info.delta =
std::max(static_cast<int64_t>(0), new_usage - usage);
}
ReserveQuotaInternal(normalized_info);
if (std::move(callback).Run(base::File::FILE_OK, normalized_info.delta))
return;
// The requester could not accept the reserved quota. Revert it.
ReserveQuotaInternal(QuotaReservationInfo(
normalized_info.origin, normalized_info.type, -normalized_info.delta));
}
void QuotaBackendImpl::ReserveQuotaInternal(const QuotaReservationInfo& info) {
DCHECK(file_task_runner_->RunsTasksInCurrentSequence());
DCHECK(!info.origin.opaque());
DCHECK(quota_manager_proxy_.get());
auto bucket = BucketLocator::ForDefaultBucket(
blink::StorageKey::CreateFirstParty(info.origin));
quota_manager_proxy_->NotifyBucketModified(
QuotaClientType::kFileSystem, bucket, info.delta, base::Time::Now(),
base::SequencedTaskRunner::GetCurrentDefault(), base::DoNothing());
}
base::FileErrorOr<base::FilePath> QuotaBackendImpl::GetUsageCachePath(
const url::Origin& origin,
FileSystemType type) {
DCHECK(file_task_runner_->RunsTasksInCurrentSequence());
DCHECK(!origin.opaque());
return SandboxFileSystemBackendDelegate::
GetUsageCachePathForStorageKeyAndType(
obfuscated_file_util_, blink::StorageKey::CreateFirstParty(origin),
type);
}
QuotaBackendImpl::QuotaReservationInfo::QuotaReservationInfo(
const url::Origin& origin,
FileSystemType type,
int64_t delta)
: origin(origin), type(type), delta(delta) {}
QuotaBackendImpl::QuotaReservationInfo::~QuotaReservationInfo() = default;
} // namespace storage
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