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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/open_file_handle_context.h"
#include <stdint.h>
#include <optional>
#include "base/files/file_util.h"
#include "storage/browser/file_system/quota/quota_reservation_buffer.h"
namespace storage {
OpenFileHandleContext::OpenFileHandleContext(
const base::FilePath& platform_path,
QuotaReservationBuffer* reservation_buffer)
: initial_file_size_(0),
maximum_written_offset_(0),
append_mode_write_amount_(0),
platform_path_(platform_path),
reservation_buffer_(reservation_buffer) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
initial_file_size_ = base::GetFileSize(platform_path).value_or(0);
maximum_written_offset_ = initial_file_size_;
}
int64_t OpenFileHandleContext::UpdateMaxWrittenOffset(int64_t offset) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
if (offset <= maximum_written_offset_)
return 0;
int64_t growth = offset - maximum_written_offset_;
maximum_written_offset_ = offset;
return growth;
}
void OpenFileHandleContext::AddAppendModeWriteAmount(int64_t amount) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
append_mode_write_amount_ += amount;
}
int64_t OpenFileHandleContext::GetEstimatedFileSize() const {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
return maximum_written_offset_ + append_mode_write_amount_;
}
int64_t OpenFileHandleContext::GetMaxWrittenOffset() const {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
return maximum_written_offset_;
}
OpenFileHandleContext::~OpenFileHandleContext() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
// TODO(tzik): Optimize this for single operation.
int64_t file_size = base::GetFileSize(platform_path_).value_or(0);
int64_t usage_delta = file_size - initial_file_size_;
// |reserved_quota_consumption| may be greater than the recorded file growth
// when a plugin crashed before reporting its consumption.
// In this case, the reserved quota for the plugin should be handled as
// consumed quota.
int64_t reserved_quota_consumption =
std::max(GetEstimatedFileSize(), file_size) - initial_file_size_;
reservation_buffer_->CommitFileGrowth(reserved_quota_consumption,
usage_delta);
reservation_buffer_->DetachOpenFileHandleContext(this);
}
} // namespace storage
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