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xfsprogs update - Andi's mkfs log size default change and enabling large
sector support being the two big ticket items, several other small fixes
too.
no longer warns on devices with the clean flag not set.

/*
 * Copyright (c) 2000-2003 Silicon Graphics, Inc.  All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * Further, this software is distributed without any warranty that it is
 * free of the rightful claim of any third person regarding infringement
 * or the like.  Any license provided herein, whether implied or
 * otherwise, applies only to this software file.  Patent licenses, if
 * any, provided herein do not apply to combinations of this program with
 * other software, or any other product whatsoever.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write the Free Software Foundation, Inc., 59
 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
 *
 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
 * Mountain View, CA  94043, or:
 *
 * http://www.sgi.com
 *
 * For further information regarding this notice, see:
 *
 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
 */

#include "drivers.h"
#include "md.h"

int
mnt_is_md_subvol(dev_t dev)
{
	if (major(dev) == MD_MAJOR)
		return 1;
	if (major(dev) == get_driver_block_major("md"))
		return 1;
	return 0;
}

int
md_get_subvol_stripe(
	char		*dfile,
	sv_type_t	type,
	int		*sunit,
	int		*swidth,
	struct stat64	*sb)
{
	if (mnt_is_md_subvol(sb->st_rdev)) {
		struct md_array_info	md;
		int			fd;

		/* Open device */
		fd = open(dfile, O_RDONLY);
		if (fd == -1)
			return 0;

		/* Is this thing on... */
		if (ioctl(fd, GET_ARRAY_INFO, &md)) {
			fprintf(stderr,
				_("Error getting MD array info from %s\n"),
				dfile);
			exit(1);
		}
		close(fd);

		/* Check state */
		if (md.state & (1 << MD_SB_ERRORS)) {
			fprintf(stderr,
				_("warning - MD array %s in error state\n"),
				dfile);
			exit(1);
		}

		/* Deduct a disk from stripe width on RAID4/5 */
		if (md.level == 4 || md.level == 5)
			md.nr_disks--;

		/* Update sizes */
		*sunit = md.chunk_size >> 9;
		*swidth = *sunit * md.nr_disks;

		return 1;
	}
	return 0;
}