2 * mdadm - manage Linux "md" devices aka RAID arrays.
4 * Copyright (C) 2002-2006 Neil Brown <neilb@suse.de>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 * Email: <neilb@cse.unsw.edu.au>
24 * School of Computer Science and Engineering
25 * The University of New South Wales
36 /* Give a brief description of the device,
37 * whether it is an md device and whether it has
40 int fd
= open(dev
, O_RDONLY
, 0);
43 int superror
, superrno
;
45 mdu_array_info_t array
;
47 struct supertype
*st
= NULL
;
49 unsigned long long larray_size
;
56 fprintf(stderr
, Name
": cannot open %s: %s\n",
57 dev
, strerror(errno
));
61 vers
= md_get_version(fd
);
62 if (ioctl(fd
, GET_ARRAY_INFO
, &array
)<0)
68 if (vers
>=9000 && !ioctlerr
) {
69 if (!get_dev_size(fd
, NULL
, &larray_size
))
74 printf("%s: is not an md array\n", dev
);
76 printf("%s: is an md device, but kernel cannot provide details\n", dev
);
77 else if (ioctlerr
== ENODEV
)
78 printf("%s: is an md device which is not active\n", dev
);
80 printf("%s: is an md device, but gives \"%s\" when queried\n",
81 dev
, strerror(ioctlerr
));
83 printf("%s: %s %s %d devices, %d spare%s. Use mdadm --detail for more detail.\n",
85 human_size_brief(larray_size
),
86 map_num(pers
, array
.level
),
88 array
.spare_disks
, array
.spare_disks
==1?"":"s");
92 superror
= st
->ss
->load_super(st
, fd
, &super
, dev
);
98 /* array might be active... */
99 st
->ss
->getinfo_super(&info
, super
);
100 if (st
->ss
->major
== 0) {
101 mddev
= get_md_name(info
.array
.md_minor
);
102 disc
.number
= info
.disk
.number
;
103 activity
= "undetected";
104 if (mddev
&& (fd
= open(mddev
, O_RDONLY
))>=0) {
105 if (md_get_version(fd
) >= 9000 &&
106 ioctl(fd
, GET_ARRAY_INFO
, &array
)>= 0) {
107 if (ioctl(fd
, GET_DISK_INFO
, &disc
) >= 0 &&
108 makedev((unsigned)disc
.major
,(unsigned)disc
.minor
) == stb
.st_rdev
)
111 activity
= "mismatch";
116 activity
= "unknown";
119 printf("%s: device %d in %d device %s %s %s. Use mdadm --examine for more detail.\n",
121 info
.disk
.number
, info
.array
.raid_disks
,
123 map_num(pers
, info
.array
.level
),
125 if (st
->ss
->major
== 0)