/*
 * 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;
}

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 = bdev->bd_inode->i_size >> sb->s_blocksize_bits;

	if (lblock)
		return lblock - 1;
	else
		return 0;
}
xt.git/refs/?id=0d5415b489f68b58e1983a53793d25d53098ed4b'>refs</a><a class='active' href='/cgit.cgi/linux/net-next.git/log/drivers/usb/host/fhci-hcd.c'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/host/fhci-hcd.c?id=0d5415b489f68b58e1983a53793d25d53098ed4b'>tree</a><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/host/fhci-hcd.c?id=0d5415b489f68b58e1983a53793d25d53098ed4b'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/host/fhci-hcd.c?id=0d5415b489f68b58e1983a53793d25d53098ed4b'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/drivers/usb/host/fhci-hcd.c'>
<input type='hidden' name='id' value='0d5415b489f68b58e1983a53793d25d53098ed4b'/><select name='qt'>
<option value='grep'>log msg</option>
<option value='author'>author</option>
<option value='committer'>committer</option>
<option value='range'>range</option>
</select>
<input class='txt' type='search' size='10' name='q' value=''/>
<input type='submit' value='search'/>
</form>
</td></tr></table>
<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?id=0d5415b489f68b58e1983a53793d25d53098ed4b'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/drivers?id=0d5415b489f68b58e1983a53793d25d53098ed4b'>drivers</a>/<a href='/cgit.cgi/linux/net-next.git/log/drivers/usb?id=0d5415b489f68b58e1983a53793d25d53098ed4b'>usb</a>/<a href='/cgit.cgi/linux/net-next.git/log/drivers/usb/host?id=0d5415b489f68b58e1983a53793d25d53098ed4b'>host</a>/<a href='/cgit.cgi/linux/net-next.git/log/drivers/usb/host/fhci-hcd.c?id=0d5415b489f68b58e1983a53793d25d53098ed4b'>fhci-hcd.c</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/drivers/usb/host/fhci-hcd.c?id=0d5415b489f68b58e1983a53793d25d53098ed4b&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>