Release 4.18 fs/udf/lowlevel.c

/*
 * lowlevel.c
 *
 * PURPOSE
 *  Low Level Device Routines for the UDF filesystem
 *
 * COPYRIGHT
 *      This file is distributed under the terms of the GNU General Public
 *      License (GPL). Copies of the GPL can be obtained from:
 *              ftp://prep.ai.mit.edu/pub/gnu/GPL
 *      Each contributing author retains all rights to their own work.
 *
 *  (C) 1999-2001 Ben Fennema
 *
 * HISTORY
 *
 *  03/26/99 blf  Created.
 */

#include "udfdecl.h"

#include <linux/blkdev.h>
#include <linux/cdrom.h>
#include <linux/uaccess.h>

#include "udf_sb.h"



unsigned int udf_get_last_session(struct super_block *sb)
{
	struct cdrom_multisession ms_info;
	unsigned int vol_desc_start;
	struct block_device *bdev = sb->s_bdev;
	int i;

	vol_desc_start = 0;
	ms_info.addr_format = CDROM_LBA;
	i = ioctl_by_bdev(bdev, CDROMMULTISESSION, (unsigned long)&ms_info);

	if (i == 0) {
		udf_debug("XA disk: %s, vol_desc_start=%d\n",
			  ms_info.xa_flag ? "yes" : "no", ms_info.addr.lba);
		if (ms_info.xa_flag) /* necessary for a valid ms_info.addr */
			vol_desc_start = ms_info.addr.lba;
	} else {
		udf_debug("CDROMMULTISESSION not supported: rc=%d\n", i);
	}
	return vol_desc_start;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
112
100.00%
2
100.00%
Total
112
100.00%
2
100.00%



unsigned long udf_get_last_block(struct super_block *sb)
{
	struct block_device *bdev = sb->s_bdev;
	unsigned long lblock = 0;

	/*
         * ioctl failed or returned obviously bogus value?
         * Try using the device size...
         */
	if (ioctl_by_bdev(bdev, CDROM_LAST_WRITTEN, (unsigned long) &lblock) ||
	    lblock == 0)
		lblock = i_size_read(bdev->bd_inode) >> sb->s_blocksize_bits;

	if (lblock)
		return lblock - 1;
	else
		return 0;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
57
78.08%
6
50.00%
Jan Kara
5
6.85%
1
8.33%
Al Viro
3
4.11%
1
8.33%
Fabian Frederick
3
4.11%
1
8.33%
Linus Torvalds
3
4.11%
2
16.67%
Ben Fennema
2
2.74%
1
8.33%
Total
73
100.00%
12
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
183
91.04%
6
42.86%
Jan Kara
5
2.49%
1
7.14%
Fabian Frederick
4
1.99%
2
14.29%
Linus Torvalds
3
1.49%
2
14.29%
Al Viro
3
1.49%
1
7.14%
Ben Fennema
2
1.00%
1
7.14%
Adrian Bunk
1
0.50%
1
7.14%
Cyrill V. Gorcunov
0.00%
0
0.00%
Total
201
100.00%
14
100.00%
Directory: fs/udf

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