1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
/*
* mdadm - manage Linux "md" devices aka RAID arrays.
*
* Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Author: Neil Brown
* Email: <neilb@cse.unsw.edu.au>
* Paper: Neil Brown
* School of Computer Science and Engineering
* The University of New South Wales
* Sydney, 2052
* Australia
*/
#include "mdadm.h"
#include "dlink.h"
#if ! defined(__BIG_ENDIAN) && ! defined(__LITTLE_ENDIAN)
#error no endian defined
#endif
#include "md_u.h"
#include "md_p.h"
int Examine(mddev_dev_t devlist, int brief, int scan)
{
/* Read the raid superblock from a device and
* display important content.
*
* If cannot be found, print reason: too small, bad magic
*
* Print:
* version, ctime, level, size, raid+spare+
* prefered minor
* uuid
*
* utime, state etc
*
* If (brief) gather devices for same array and just print a mdadm.conf line including devices=
* if devlist==NULL, use conf_get_devs(
*/
int fd;
time_t atime;
mdp_super_t super;
int d;
char *c;
int rv = 0;
int err;
struct array {
mdp_super_t super;
void *devs;
struct array *next;
} *arrays = NULL;
for (; devlist ; devlist=devlist->next) {
fd = open(devlist->devname, O_RDONLY);
if (fd < 0) {
if (!scan)
fprintf(stderr,Name ": cannot open %s: %s\n",
devlist->devname, strerror(errno));
err = 1;
}
else {
err = load_super(fd, &super);
close(fd);
}
if (err && (brief||scan))
continue;
if (err) rv =1;
switch(err) {
case 1:
fprintf(stderr, Name ": cannot find device size for %s: %s\n",
devlist->devname, strerror(errno));
continue;
case 2:
/* fprintf(stderr, Name ": %s is too small for md: size is %ld sectors\n",
devlist->devname, size);
*/
fprintf(stderr, Name ": %s is too small for md\n",
devlist->devname);
continue;
case 3:
fprintf(stderr, Name ": Cannot seek to superblock on %s: %s\n",
devlist->devname, strerror(errno));
continue;
case 4:
fprintf(stderr, Name ": Cannot read superblock on %s\n",
devlist->devname);
continue;
case 5:
fprintf(stderr, Name ": No super block found on %s (Expected magic %08x, got %08x)\n",
devlist->devname, MD_SB_MAGIC, super.md_magic);
continue;
case 6:
fprintf(stderr, Name ": Cannot interpret superblock on %s - version is %d\n",
devlist->devname, super.major_version);
continue;
}
/* Ok, its good enough to try, though the checksum could be wrong */
if (brief) {
struct array *ap;
char *d;
for (ap=arrays; ap; ap=ap->next) {
if (compare_super(&ap->super, &super)==0)
break;
}
if (!ap) {
ap = malloc(sizeof(*ap));
ap->super = super;
ap->devs = dl_head();
ap->next = arrays;
arrays = ap;
}
d = dl_strdup(devlist->devname);
dl_add(ap->devs, d);
} else {
printf("%s:\n",devlist->devname);
printf(" Magic : %08x\n", super.md_magic);
printf(" Version : %02d.%02d.%02d\n", super.major_version, super.minor_version,
super.patch_version);
if (super.minor_version >= 90)
printf(" UUID : %08x:%08x:%08x:%08x\n", super.set_uuid0, super.set_uuid1,
super.set_uuid2, super.set_uuid3);
else
printf(" UUID : %08x\n", super.set_uuid0);
atime = super.ctime;
printf(" Creation Time : %.24s\n", ctime(&atime));
c=map_num(pers, super.level);
printf(" Raid Level : %s\n", c?c:"-unknown-");
printf(" Device Size : %d%s\n", super.size, human_size((long long)super.size<<10));
printf(" Raid Disks : %d\n", super.raid_disks);
printf(" Total Disks : %d\n", super.nr_disks);
printf("Preferred Minor : %d\n", super.md_minor);
printf("\n");
atime = super.utime;
printf(" Update Time : %.24s\n", ctime(&atime));
printf(" State : %s, %serrors\n",
(super.state&(1<<MD_SB_CLEAN))?"clean":"dirty",
(super.state&(1<<MD_SB_ERRORS))?"":"no-");
printf(" Active Drives : %d\n", super.active_disks);
printf(" Working Drives : %d\n", super.working_disks);
printf(" Failed Drives : %d\n", super.failed_disks);
printf(" Spare Drives : %d\n", super.spare_disks);
if (calc_sb_csum(&super) == super.sb_csum)
printf(" Checksum : %x - correct\n", super.sb_csum);
else
printf(" Checksum : %x - expected %x\n", super.sb_csum, calc_sb_csum(&super));
printf(" Events : %d.%d\n", super.events_hi, super.events_lo);
printf("\n");
if (super.level == 5) {
c = map_num(r5layout, super.layout);
printf(" Layout : %s\n", c?c:"-unknown-");
}
switch(super.level) {
case 0:
case 4:
case 5:
printf(" Chunk Size : %dK\n", super.chunk_size/1024);
break;
case -1:
printf(" Rounding : %dK\n", super.chunk_size/1024);
break;
default: break;
}
printf("\n");
printf(" Number Major Minor RaidDisk State\n");
for (d= -1; d<(signed int)(super.raid_disks+super.spare_disks); d++) {
mdp_disk_t *dp;
char *dv;
char nb[5];
if (d>=0) dp = &super.disks[d];
else dp = &super.this_disk;
sprintf(nb, "%4d", d);
printf("%4s %5d %5d %5d %5d ", d < 0 ? "this" : nb,
dp->number, dp->major, dp->minor, dp->raid_disk);
if (dp->state & (1<<MD_DISK_FAULTY)) printf(" faulty");
if (dp->state & (1<<MD_DISK_ACTIVE)) printf(" active");
if (dp->state & (1<<MD_DISK_SYNC)) printf(" sync");
if (dp->state & (1<<MD_DISK_REMOVED)) printf(" removed");
if ((dv=map_dev(dp->major, dp->minor)))
printf(" %s", dv);
printf("\n");
}
}
}
if (brief) {
struct array *ap;
for (ap=arrays; ap; ap=ap->next) {
char sep='=';
char *c=map_num(pers, ap->super.level);
char *d;
printf("ARRAY /dev/md%d level=%s disks=%d UUID=",
ap->super.md_minor, c?c:"-unknown-", ap->super.raid_disks);
if (ap->super.minor_version >= 90)
printf("%08x:%08x:%08x:%08x", ap->super.set_uuid0, ap->super.set_uuid1,
ap->super.set_uuid2, ap->super.set_uuid3);
else
printf("%08x", ap->super.set_uuid0);
printf("\n devices");
for (d=dl_next(ap->devs); d!= ap->devs; d=dl_next(d)) {
printf("%c%s", sep, d);
sep=',';
}
printf("\n");
}
}
return rv;
}
|
