]>
git.ipfire.org Git - thirdparty/xfsprogs-dev.git/blob - libdisk/md.c
2 * Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope that it would be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12 * Further, this software is distributed without any warranty that it is
13 * free of the rightful claim of any third person regarding infringement
14 * or the like. Any license provided herein, whether implied or
15 * otherwise, applies only to this software file. Patent licenses, if
16 * any, provided herein do not apply to combinations of this program with
17 * other software, or any other product whatsoever.
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write the Free Software Foundation, Inc., 59
21 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
23 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
24 * Mountain View, CA 94043, or:
28 * For further information regarding this notice, see:
30 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
41 mnt_is_md_subvol(dev_t dev
)
43 if (dev
>> 8 == MD_MAJOR
)
56 if (mnt_is_md_subvol(sb
->st_rdev
)) {
57 struct md_array_info_s md
;
61 fd
= open(dfile
, O_RDONLY
);
65 /* Is this thing on... */
66 if (ioctl(fd
, GET_ARRAY_INFO
, &md
)) {
67 fprintf(stderr
, "Error getting MD array info from %s\n",
74 fprintf(stderr
, "MD array %s not in clean state\n",
79 /* Deduct a disk from stripe width on RAID4/5 */
80 if (md
.level
== 4 || md
.level
== 5)
84 *sunit
= md
.chunk_size
>> 9;
85 *swidth
= *sunit
* md
.nr_disks
;