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1 | /* | |
2 | * mdadm - manage Linux "md" devices aka RAID arrays. | |
3 | * | |
4 | * Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au> | |
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 scan, int SparcAdjust, struct supertype *forcest) | |
39 | { | |
40 | ||
41 | /* Read the raid superblock from a device and | |
42 | * display important content. | |
43 | * | |
44 | * If cannot be found, print reason: too small, bad magic | |
45 | * | |
46 | * Print: | |
47 | * version, ctime, level, size, raid+spare+ | |
48 | * prefered minor | |
49 | * uuid | |
50 | * | |
51 | * utime, state etc | |
52 | * | |
53 | * If (brief) gather devices for same array and just print a mdadm.conf line including devices= | |
54 | * if devlist==NULL, use conf_get_devs( | |
55 | */ | |
56 | int fd; | |
57 | void *super = NULL; | |
58 | int rv = 0; | |
59 | int err; | |
60 | ||
61 | struct array { | |
62 | void *super; | |
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 = 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 | err = 1; | |
79 | } | |
80 | else { | |
81 | if (!st) | |
82 | st = guess_super(fd); | |
83 | if (st) | |
84 | err = st->ss->load_super(st, fd, &super, (brief||scan)?NULL:devlist->devname); | |
85 | else | |
86 | err = 1; | |
87 | close(fd); | |
88 | } | |
89 | if (err) | |
90 | continue; | |
91 | if (err) rv =1; | |
92 | ||
93 | if (SparcAdjust) | |
94 | st->ss->update_super(NULL, super, "sparc2.2", devlist->devname, 0); | |
95 | /* Ok, its good enough to try, though the checksum could be wrong */ | |
96 | if (brief) { | |
97 | struct array *ap; | |
98 | char *d; | |
99 | for (ap=arrays; ap; ap=ap->next) { | |
100 | if (st->ss == ap->st->ss && st->ss->compare_super(&ap->super, super)==0) | |
101 | break; | |
102 | } | |
103 | if (!ap) { | |
104 | ap = malloc(sizeof(*ap)); | |
105 | ap->super = super; | |
106 | ap->devs = dl_head(); | |
107 | ap->next = arrays; | |
108 | ap->spares = 0; | |
109 | ap->st = st; | |
110 | arrays = ap; | |
111 | st->ss->getinfo_super(&ap->info, super); | |
112 | } else { | |
113 | st->ss->getinfo_super(&ap->info, super); | |
114 | free(super); | |
115 | } | |
116 | if (!(ap->info.disk.state & MD_DISK_SYNC)) | |
117 | ap->spares++; | |
118 | d = dl_strdup(devlist->devname); | |
119 | dl_add(ap->devs, d); | |
120 | } else { | |
121 | printf("%s:\n",devlist->devname); | |
122 | st->ss->examine_super(super); | |
123 | free(super); | |
124 | } | |
125 | } | |
126 | if (brief) { | |
127 | struct array *ap; | |
128 | for (ap=arrays; ap; ap=ap->next) { | |
129 | char sep='='; | |
130 | char *d; | |
131 | ap->st->ss->brief_examine_super(ap->super); | |
132 | if (ap->spares) printf(" spares=%d", ap->spares); | |
133 | if (brief > 1) { | |
134 | printf(" devices"); | |
135 | for (d=dl_next(ap->devs); d!= ap->devs; d=dl_next(d)) { | |
136 | printf("%c%s", sep, d); | |
137 | sep=','; | |
138 | } | |
139 | } | |
140 | free(ap->super); | |
141 | /* FIXME free ap */ | |
142 | printf("\n"); | |
143 | } | |
144 | } | |
145 | return rv; | |
146 | } |