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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" | |
38 | int 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 | } |