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Commit | Line | Data |
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64c4757e | 1 | /* |
9a9dab36 | 2 | * mdadm - manage Linux "md" devices aka RAID arrays. |
64c4757e | 3 | * |
cd29a5c8 | 4 | * Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au> |
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 | |
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 | ||
9a9dab36 | 30 | #include "mdadm.h" |
cd29a5c8 | 31 | #include "dlink.h" |
64c4757e | 32 | |
82b27616 NB |
33 | #if ! defined(__BIG_ENDIAN) && ! defined(__LITTLE_ENDIAN) |
34 | #error no endian defined | |
35 | #endif | |
64c4757e NB |
36 | #include "md_u.h" |
37 | #include "md_p.h" | |
bd526cee | 38 | int Examine(mddev_dev_t devlist, int brief, int scan, int SparcAdjust) |
64c4757e NB |
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 | * | |
9a9dab36 | 53 | * If (brief) gather devices for same array and just print a mdadm.conf line including devices= |
cd29a5c8 | 54 | * if devlist==NULL, use conf_get_devs( |
64c4757e | 55 | */ |
cd29a5c8 | 56 | int fd; |
64c4757e NB |
57 | time_t atime; |
58 | mdp_super_t super; | |
59 | int d; | |
682c7051 | 60 | char *c; |
cd29a5c8 NB |
61 | int rv = 0; |
62 | int err; | |
64c4757e | 63 | |
cd29a5c8 NB |
64 | struct array { |
65 | mdp_super_t super; | |
66 | void *devs; | |
67 | struct array *next; | |
68 | } *arrays = NULL; | |
69 | ||
cd29a5c8 NB |
70 | for (; devlist ; devlist=devlist->next) { |
71 | fd = open(devlist->devname, O_RDONLY); | |
72 | if (fd < 0) { | |
73 | if (!scan) | |
74 | fprintf(stderr,Name ": cannot open %s: %s\n", | |
75 | devlist->devname, strerror(errno)); | |
76 | err = 1; | |
77 | } | |
78 | else { | |
79 | err = load_super(fd, &super); | |
80 | close(fd); | |
81 | } | |
82 | if (err && (brief||scan)) | |
83 | continue; | |
84 | if (err) rv =1; | |
85 | switch(err) { | |
86 | case 1: | |
87 | fprintf(stderr, Name ": cannot find device size for %s: %s\n", | |
88 | devlist->devname, strerror(errno)); | |
89 | continue; | |
90 | case 2: | |
682c7051 | 91 | /* fprintf(stderr, Name ": %s is too small for md: size is %ld sectors\n", |
cd29a5c8 | 92 | devlist->devname, size); |
64c4757e | 93 | */ |
cd29a5c8 NB |
94 | fprintf(stderr, Name ": %s is too small for md\n", |
95 | devlist->devname); | |
96 | continue; | |
97 | case 3: | |
98 | fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n", | |
99 | devlist->devname, strerror(errno)); | |
100 | continue; | |
101 | case 4: | |
102 | fprintf(stderr, Name ": Cannot read superblock on %s\n", | |
103 | devlist->devname); | |
104 | continue; | |
105 | case 5: | |
106 | fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n", | |
107 | devlist->devname, MD_SB_MAGIC, super.md_magic); | |
108 | continue; | |
109 | case 6: | |
110 | fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n", | |
111 | devlist->devname, super.major_version); | |
112 | continue; | |
113 | } | |
64c4757e | 114 | |
cd29a5c8 NB |
115 | /* Ok, its good enough to try, though the checksum could be wrong */ |
116 | if (brief) { | |
117 | struct array *ap; | |
118 | char *d; | |
119 | for (ap=arrays; ap; ap=ap->next) { | |
120 | if (compare_super(&ap->super, &super)==0) | |
121 | break; | |
122 | } | |
123 | if (!ap) { | |
124 | ap = malloc(sizeof(*ap)); | |
125 | ap->super = super; | |
126 | ap->devs = dl_head(); | |
127 | ap->next = arrays; | |
128 | arrays = ap; | |
129 | } | |
130 | d = dl_strdup(devlist->devname); | |
131 | dl_add(ap->devs, d); | |
132 | } else { | |
133 | printf("%s:\n",devlist->devname); | |
134 | printf(" Magic : %08x\n", super.md_magic); | |
135 | printf(" Version : %02d.%02d.%02d\n", super.major_version, super.minor_version, | |
136 | super.patch_version); | |
137 | if (super.minor_version >= 90) | |
138 | printf(" UUID : %08x:%08x:%08x:%08x\n", super.set_uuid0, super.set_uuid1, | |
139 | super.set_uuid2, super.set_uuid3); | |
140 | else | |
141 | printf(" UUID : %08x\n", super.set_uuid0); | |
64c4757e | 142 | |
cd29a5c8 NB |
143 | atime = super.ctime; |
144 | printf(" Creation Time : %.24s\n", ctime(&atime)); | |
145 | c=map_num(pers, super.level); | |
146 | printf(" Raid Level : %s\n", c?c:"-unknown-"); | |
56eb10c0 | 147 | printf(" Device Size : %d%s\n", super.size, human_size((long long)super.size<<10)); |
b83d95f3 NB |
148 | printf(" Raid Devices : %d\n", super.raid_disks); |
149 | printf(" Total Devices : %d\n", super.nr_disks); | |
cd29a5c8 NB |
150 | printf("Preferred Minor : %d\n", super.md_minor); |
151 | printf("\n"); | |
152 | atime = super.utime; | |
153 | printf(" Update Time : %.24s\n", ctime(&atime)); | |
154 | printf(" State : %s, %serrors\n", | |
155 | (super.state&(1<<MD_SB_CLEAN))?"clean":"dirty", | |
156 | (super.state&(1<<MD_SB_ERRORS))?"":"no-"); | |
b83d95f3 NB |
157 | printf(" Active Devices : %d\n", super.active_disks); |
158 | printf("Working Devices : %d\n", super.working_disks); | |
159 | printf(" Failed Devices : %d\n", super.failed_disks); | |
160 | printf(" Spare Devices : %d\n", super.spare_disks); | |
cd29a5c8 NB |
161 | if (calc_sb_csum(&super) == super.sb_csum) |
162 | printf(" Checksum : %x - correct\n", super.sb_csum); | |
163 | else | |
164 | printf(" Checksum : %x - expected %x\n", super.sb_csum, calc_sb_csum(&super)); | |
bd526cee NB |
165 | if (SparcAdjust) { |
166 | /* 2.2 sparc put the events in the wrong place | |
167 | * So we copy the tail of the superblock | |
168 | * up 4 bytes before continuing | |
169 | */ | |
170 | __u32 *sb32 = (__u32*)&super; | |
171 | memcpy(sb32+MD_SB_GENERIC_CONSTANT_WORDS+7, | |
172 | sb32+MD_SB_GENERIC_CONSTANT_WORDS+7+1, | |
5787fa49 | 173 | (MD_SB_WORDS - (MD_SB_GENERIC_CONSTANT_WORDS+7+1))*4); |
bd526cee NB |
174 | printf (" --- adjusting superblock for 2.2/sparc compatability ---\n"); |
175 | } | |
cd29a5c8 NB |
176 | printf(" Events : %d.%d\n", super.events_hi, super.events_lo); |
177 | printf("\n"); | |
178 | if (super.level == 5) { | |
179 | c = map_num(r5layout, super.layout); | |
180 | printf(" Layout : %s\n", c?c:"-unknown-"); | |
181 | } | |
182 | switch(super.level) { | |
183 | case 0: | |
184 | case 4: | |
185 | case 5: | |
186 | printf(" Chunk Size : %dK\n", super.chunk_size/1024); | |
187 | break; | |
188 | case -1: | |
189 | printf(" Rounding : %dK\n", super.chunk_size/1024); | |
190 | break; | |
191 | default: break; | |
192 | } | |
193 | printf("\n"); | |
b83d95f3 | 194 | printf(" Number Major Minor RaidDevice State\n"); |
cd29a5c8 NB |
195 | for (d= -1; d<(signed int)(super.raid_disks+super.spare_disks); d++) { |
196 | mdp_disk_t *dp; | |
197 | char *dv; | |
198 | char nb[5]; | |
199 | if (d>=0) dp = &super.disks[d]; | |
200 | else dp = &super.this_disk; | |
201 | sprintf(nb, "%4d", d); | |
202 | printf("%4s %5d %5d %5d %5d ", d < 0 ? "this" : nb, | |
203 | dp->number, dp->major, dp->minor, dp->raid_disk); | |
204 | if (dp->state & (1<<MD_DISK_FAULTY)) printf(" faulty"); | |
205 | if (dp->state & (1<<MD_DISK_ACTIVE)) printf(" active"); | |
206 | if (dp->state & (1<<MD_DISK_SYNC)) printf(" sync"); | |
207 | if (dp->state & (1<<MD_DISK_REMOVED)) printf(" removed"); | |
aa88f531 | 208 | if (dp->state == 0) printf(" spare"); |
cd29a5c8 NB |
209 | if ((dv=map_dev(dp->major, dp->minor))) |
210 | printf(" %s", dv); | |
211 | printf("\n"); | |
212 | } | |
213 | } | |
bd526cee NB |
214 | if (SparcAdjust == 2) { |
215 | printf(" ----- updating superblock on device ----\n"); | |
216 | fd = open(devlist->devname, O_RDWR); | |
217 | if (fd < 0) { | |
218 | fprintf(stderr, Name ": cannot open %s to update superblock: %s\n", | |
219 | devlist->devname, strerror(errno)); | |
220 | err = 1; | |
221 | } else { | |
222 | super.sb_csum = calc_sb_csum(&super); | |
223 | if (store_super(fd, &super)) { | |
224 | fprintf(stderr, Name ": Count not re-write superblock on %s\n", | |
225 | devlist->devname); | |
226 | err = 1; | |
227 | } | |
228 | close(fd); | |
229 | } | |
230 | } | |
82b27616 | 231 | } |
cd29a5c8 NB |
232 | if (brief) { |
233 | struct array *ap; | |
234 | for (ap=arrays; ap; ap=ap->next) { | |
235 | char sep='='; | |
236 | char *c=map_num(pers, ap->super.level); | |
237 | char *d; | |
b83d95f3 | 238 | printf("ARRAY /dev/md%d level=%s num-devices=%d UUID=", |
cd29a5c8 NB |
239 | ap->super.md_minor, c?c:"-unknown-", ap->super.raid_disks); |
240 | if (ap->super.minor_version >= 90) | |
241 | printf("%08x:%08x:%08x:%08x", ap->super.set_uuid0, ap->super.set_uuid1, | |
242 | ap->super.set_uuid2, ap->super.set_uuid3); | |
243 | else | |
244 | printf("%08x", ap->super.set_uuid0); | |
245 | printf("\n devices"); | |
246 | for (d=dl_next(ap->devs); d!= ap->devs; d=dl_next(d)) { | |
247 | printf("%c%s", sep, d); | |
248 | sep=','; | |
249 | } | |
250 | printf("\n"); | |
251 | } | |
64c4757e | 252 | } |
cd29a5c8 | 253 | return rv; |
64c4757e | 254 | } |