blob: 88053938726f88bbeb7fe748e7dd0c413f14c5c3 [file] [log] [blame]
// Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <string>
#include <vector>
#include "base/basictypes.h"
#include "update_engine/update_metadata.pb.h"
namespace chromeos_update_engine {
namespace extent_mapper {
// Uses the FIBMAP ioctl to get all blocks used by a file and return them
// as extents. Blocks are relative to the start of the filesystem. If
// there is a sparse "hole" in the file, the blocks for that will be
// represented by an extent whose start block is kSpareseHole.
// The resulting extents are stored in 'out'. Keep in mind that while
// the blocksize of a filesystem is often 4096 bytes, that is not always
// the case, so one should consult GetFilesystemBlockSize(), too.
// Returns true on success.
bool ExtentsForFileFibmap(const std::string& path, std::vector<Extent>* out);
// Puts the blocksize of the filesystem, as used by the FIBMAP ioctl, into
// out_blocksize by using the FIGETBSZ ioctl. Returns true on success.
bool GetFilesystemBlockSize(const std::string& path, uint32_t* out_blocksize);
} // namespace extent_mapper
} // namespace chromeos_update_engine