2N/A * mft.h - Exports for MFT record handling. Part of the Linux-NTFS project. 2N/A * Copyright (c) 2000-2002 Anton Altaparmakov 2N/A * Copyright (c) 2004-2005 Richard Russon 2N/A * modify it under the terms of the GNU General Public License as published 2N/A * by the Free Software Foundation; either version 2 of the License, or 2N/A * (at your option) any later version. 2N/A * useful, but WITHOUT ANY WARRANTY; without even the implied warranty 2N/A * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 2N/A * GNU General Public License for more details. 2N/A * You should have received a copy of the GNU General Public License 2N/A * along with this program (in the main directory of the Linux-NTFS 2N/A * distribution in the file COPYING); if not, write to the Free Software 2N/A * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 2N/A * ntfs_mft_record_read - read a record from the mft 2N/A * @vol: volume to read from 2N/A * @mref: mft record number to read 2N/A * @b: output data buffer 2N/A * Read the mft record specified by @mref from volume @vol into buffer @b. 2N/A * Return 0 on success or -1 on error, with errno set to the error code. 2N/A * The read mft record is mst deprotected and is hence ready to use. The caller 2N/A * should check the record with is_baad_record() in case mst deprotection 2N/A * NOTE: @b has to be at least of size vol->mft_record_size. 2N/A * ntfs_mft_record_write - write an mft record to disk 2N/A * @vol: volume to write to 2N/A * @mref: mft record number to write 2N/A * @b: data buffer containing the mft record to write 2N/A * Write the mft record specified by @mref from buffer @b to volume @vol. 2N/A * Return 0 on success or -1 on error, with errno set to the error code. 2N/A * Before the mft record is written, it is mst protected. After the write, it 2N/A * is deprotected again, thus resulting in an increase in the update sequence 2N/A * number inside the buffer @b. 2N/A * NOTE: @b has to be at least of size vol->mft_record_size. 2N/A * ntfs_mft_record_get_data_size - return number of bytes used in mft record @b 2N/A * @m: mft record to get the data size of 2N/A * Takes the mft record @m and returns the number of bytes used in the record 2N/A * or 0 on error (i.e. @m is not a valid mft record). Zero is not a valid size 2N/A * for an mft record as it at least has to have the MFT_RECORD itself and a 2N/A * zero length attribute of type AT_END, thus making the minimum size 56 bytes. 2N/A * Aside: The size is independent of NTFS versions 1.x/3.x because the 8-byte 2N/A * alignment of the first attribute mask the difference in MFT_RECORD size 2N/A * between NTFS 1.x and 3.x. Also, you would expect every mft record to 2N/A * contain an update sequence array as well but that could in theory be 2N/A * non-existent (don't know if Windows' NTFS driver/chkdsk wouldn't view this 2N/A * as corruption in itself though). 2N/A /* Get the number of used bytes and return it. */ 2N/A#
endif /* defined _NTFS_MFT_H */