fix examine_brief segfault
[thirdparty/mdadm.git] / Examine.c
CommitLineData
64c4757e 1/*
9a9dab36 2 * mdadm - manage Linux "md" devices aka RAID arrays.
64c4757e 3 *
e736b623 4 * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de>
64c4757e
NB
5 *
6 *
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.
11 *
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.
16 *
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
20 *
21 * Author: Neil Brown
e736b623 22 * Email: <neilb@suse.de>
64c4757e
NB
23 */
24
9a9dab36 25#include "mdadm.h"
cd29a5c8 26#include "dlink.h"
64c4757e 27
82b27616
NB
28#if ! defined(__BIG_ENDIAN) && ! defined(__LITTLE_ENDIAN)
29#error no endian defined
30#endif
64c4757e
NB
31#include "md_u.h"
32#include "md_p.h"
0d726f17 33int Examine(mddev_dev_t devlist, int brief, int export, int scan,
a1cbd7d0
NB
34 int SparcAdjust, struct supertype *forcest,
35 char *homehost)
64c4757e
NB
36{
37
38 /* Read the raid superblock from a device and
39 * display important content.
40 *
41 * If cannot be found, print reason: too small, bad magic
42 *
43 * Print:
44 * version, ctime, level, size, raid+spare+
45 * prefered minor
46 * uuid
47 *
48 * utime, state etc
49 *
9a9dab36 50 * If (brief) gather devices for same array and just print a mdadm.conf line including devices=
8b0dabea 51 * if devlist==NULL, use conf_get_devs()
64c4757e 52 */
aba69144 53 int fd;
cd29a5c8 54 int rv = 0;
6baf9a87 55 int err = 0;
64c4757e 56
cd29a5c8 57 struct array {
82d9eba6 58 struct supertype *st;
4b1ac34b 59 struct mdinfo info;
cd29a5c8
NB
60 void *devs;
61 struct array *next;
4b1ac34b 62 int spares;
cd29a5c8
NB
63 } *arrays = NULL;
64
cd29a5c8 65 for (; devlist ; devlist=devlist->next) {
82d9eba6 66 struct supertype *st = forcest;
f9ce90ba 67
8b0dabea 68 fd = dev_open(devlist->devname, O_RDONLY);
cd29a5c8 69 if (fd < 0) {
751406f3 70 if (!scan) {
cd29a5c8
NB
71 fprintf(stderr,Name ": cannot open %s: %s\n",
72 devlist->devname, strerror(errno));
e52f8e25 73 rv = 1;
751406f3 74 }
e52f8e25 75 err = 1;
cd29a5c8
NB
76 }
77 else {
82d9eba6
NB
78 if (!st)
79 st = guess_super(fd);
80 if (st)
3da92f27
NB
81 err = st->ss->load_super(st, fd,
82 (brief||scan) ? NULL
83 :devlist->devname);
6baf9a87 84 else {
e52f8e25 85 if (!brief) {
6baf9a87 86 fprintf(stderr, Name ": No md superblock detected on %s.\n", devlist->devname);
e52f8e25
NB
87 rv = 1;
88 }
f9ce90ba 89 err = 1;
6baf9a87 90 }
cd29a5c8
NB
91 close(fd);
92 }
e52f8e25 93 if (err)
cd29a5c8 94 continue;
4b1ac34b
NB
95
96 if (SparcAdjust)
3da92f27 97 st->ss->update_super(st, NULL, "sparc2.2",
68c7d6d7 98 devlist->devname, 0, 0, NULL);
cd29a5c8 99 /* Ok, its good enough to try, though the checksum could be wrong */
0d726f17 100
cd29a5c8
NB
101 if (brief) {
102 struct array *ap;
103 char *d;
104 for (ap=arrays; ap; ap=ap->next) {
68c7d6d7 105 if (st->ss == ap->st->ss &&
64557c33 106 st->ss->compare_super(ap->st, st)==0)
cd29a5c8
NB
107 break;
108 }
109 if (!ap) {
110 ap = malloc(sizeof(*ap));
cd29a5c8
NB
111 ap->devs = dl_head();
112 ap->next = arrays;
4b1ac34b 113 ap->spares = 0;
82d9eba6 114 ap->st = st;
cd29a5c8 115 arrays = ap;
3da92f27 116 st->ss->getinfo_super(st, &ap->info);
37424f13 117 } else
3da92f27 118 st->ss->getinfo_super(st, &ap->info);
032e9e29 119 if (!(ap->info.disk.state & (1<<MD_DISK_SYNC)))
4b1ac34b 120 ap->spares++;
cd29a5c8
NB
121 d = dl_strdup(devlist->devname);
122 dl_add(ap->devs, d);
0d726f17 123 } else if (export) {
bceedeec
N
124 if (st->ss->export_examine_super)
125 st->ss->export_examine_super(st);
cd29a5c8
NB
126 } else {
127 printf("%s:\n",devlist->devname);
3da92f27
NB
128 st->ss->examine_super(st, homehost);
129 st->ss->free_super(st);
bd526cee 130 }
82b27616 131 }
cd29a5c8
NB
132 if (brief) {
133 struct array *ap;
134 for (ap=arrays; ap; ap=ap->next) {
135 char sep='=';
cd29a5c8 136 char *d;
061f2c6a 137 ap->st->ss->brief_examine_super(ap->st, brief > 1);
4b1ac34b 138 if (ap->spares) printf(" spares=%d", ap->spares);
22892d56
NB
139 if (brief > 1) {
140 printf(" devices");
141 for (d=dl_next(ap->devs); d!= ap->devs; d=dl_next(d)) {
142 printf("%c%s", sep, d);
143 sep=',';
144 }
cd29a5c8 145 }
3da92f27 146 ap->st->ss->free_super(ap->st);
4b1ac34b 147 /* FIXME free ap */
d9d4e469
NB
148 if (ap->spares || brief > 1)
149 printf("\n");
cd29a5c8 150 }
64c4757e 151 }
cd29a5c8 152 return rv;
64c4757e 153}