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Exit when there are no more arrays to manage.
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1/*
2 * mdadm - manage Linux "md" devices aka RAID arrays.
3 *
4 * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
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
22 * Email: <neilb@cse.unsw.edu.au>
23 * Paper: Neil Brown
24 * School of Computer Science and Engineering
25 * The University of New South Wales
26 * Sydney, 2052
27 * Australia
28 */
29
30#include "mdadm.h"
31#include "dlink.h"
32
33#if ! defined(__BIG_ENDIAN) && ! defined(__LITTLE_ENDIAN)
34#error no endian defined
35#endif
36#include "md_u.h"
37#include "md_p.h"
38int Examine(mddev_dev_t devlist, int brief, int export, int scan,
39 int SparcAdjust, struct supertype *forcest,
40 char *homehost)
41{
42
43 /* Read the raid superblock from a device and
44 * display important content.
45 *
46 * If cannot be found, print reason: too small, bad magic
47 *
48 * Print:
49 * version, ctime, level, size, raid+spare+
50 * prefered minor
51 * uuid
52 *
53 * utime, state etc
54 *
55 * If (brief) gather devices for same array and just print a mdadm.conf line including devices=
56 * if devlist==NULL, use conf_get_devs()
57 */
58 int fd;
59 int rv = 0;
60 int err = 0;
61
62 struct array {
63 struct supertype *st;
64 struct mdinfo info;
65 void *devs;
66 struct array *next;
67 int spares;
68 } *arrays = NULL;
69
70 for (; devlist ; devlist=devlist->next) {
71 struct supertype *st = forcest;
72
73 fd = dev_open(devlist->devname, O_RDONLY);
74 if (fd < 0) {
75 if (!scan) {
76 fprintf(stderr,Name ": cannot open %s: %s\n",
77 devlist->devname, strerror(errno));
78 rv = 1;
79 }
80 err = 1;
81 }
82 else {
83 if (!st)
84 st = guess_super(fd);
85 if (st)
86 err = st->ss->load_super(st, fd,
87 (brief||scan) ? NULL
88 :devlist->devname);
89 else {
90 if (!brief) {
91 fprintf(stderr, Name ": No md superblock detected on %s.\n", devlist->devname);
92 rv = 1;
93 }
94 err = 1;
95 }
96 close(fd);
97 }
98 if (err)
99 continue;
100
101 if (SparcAdjust)
102 st->ss->update_super(st, NULL, "sparc2.2",
103 devlist->devname, 0, 0, NULL);
104 /* Ok, its good enough to try, though the checksum could be wrong */
105
106 if (brief) {
107 struct array *ap;
108 char *d;
109 for (ap=arrays; ap; ap=ap->next) {
110 if (st->ss == ap->st->ss &&
111 st->ss->compare_super(ap->st, st)==0)
112 break;
113 }
114 if (!ap) {
115 ap = malloc(sizeof(*ap));
116 ap->devs = dl_head();
117 ap->next = arrays;
118 ap->spares = 0;
119 ap->st = st;
120 arrays = ap;
121 st->ss->getinfo_super(st, &ap->info);
122 } else {
123 st->ss->getinfo_super(st, &ap->info);
124 st->ss->free_super(st);
125 }
126 if (!(ap->info.disk.state & MD_DISK_SYNC))
127 ap->spares++;
128 d = dl_strdup(devlist->devname);
129 dl_add(ap->devs, d);
130 } else if (export) {
131 st->ss->export_examine_super(st);
132 } else {
133 printf("%s:\n",devlist->devname);
134 st->ss->examine_super(st, homehost);
135 st->ss->free_super(st);
136 }
137 }
138 if (brief) {
139 struct array *ap;
140 for (ap=arrays; ap; ap=ap->next) {
141 char sep='=';
142 char *d;
143 ap->st->ss->brief_examine_super(ap->st);
144 if (ap->spares) printf(" spares=%d", ap->spares);
145 if (brief > 1) {
146 printf(" devices");
147 for (d=dl_next(ap->devs); d!= ap->devs; d=dl_next(d)) {
148 printf("%c%s", sep, d);
149 sep=',';
150 }
151 }
152 ap->st->ss->free_super(ap->st);
153 /* FIXME free ap */
154 if (ap->spares || brief > 1)
155 printf("\n");
156 }
157 }
158 return rv;
159}