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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"
64c4757e
NB
31#include "md_p.h"
32#include "md_u.h"
33
feb716e9 34int Detail(char *dev, int brief, int test)
64c4757e
NB
35{
36 /*
37 * Print out details for an md array by using
38 * GET_ARRAY_INFO and GET_DISK_INFO ioctl calls
39 */
40
41 int fd = open(dev, O_RDONLY, 0);
42 int vers;
43 mdu_array_info_t array;
b0c63f32
NB
44 mdu_disk_info_t *disks;
45 int next;
64c4757e
NB
46 int d;
47 time_t atime;
682c7051 48 char *c;
d013a55e 49 char *devices = NULL;
feb716e9 50 int spares = 0;
dd0781e5 51 struct stat stb;
e5329c37
NB
52 int is_26 = get_linux_version() >= 2006000;
53 int is_rebuilding = 0;
54 int failed = 0;
82d9eba6 55 struct supertype *st = NULL;
ea329559 56 int max_disks = MD_SB_DISKS;
64c4757e 57
4b1ac34b 58 void *super = NULL;
feb716e9 59 int rv = test ? 4 : 1;
82b27616 60
64c4757e 61 if (fd < 0) {
682c7051 62 fprintf(stderr, Name ": cannot open %s: %s\n",
64c4757e 63 dev, strerror(errno));
feb716e9 64 return rv;
64c4757e
NB
65 }
66 vers = md_get_version(fd);
67 if (vers < 0) {
682c7051 68 fprintf(stderr, Name ": %s does not appear to be an md device\n",
64c4757e
NB
69 dev);
70 close(fd);
feb716e9 71 return rv;
64c4757e 72 }
682c7051
NB
73 if (vers < 9000) {
74 fprintf(stderr, Name ": cannot get detail for md device %s: driver version too old.\n",
64c4757e
NB
75 dev);
76 close(fd);
feb716e9 77 return rv;
64c4757e
NB
78 }
79 if (ioctl(fd, GET_ARRAY_INFO, &array)<0) {
80 if (errno == ENODEV)
682c7051 81 fprintf(stderr, Name ": md device %s does not appear to be active.\n",
64c4757e
NB
82 dev);
83 else
682c7051 84 fprintf(stderr, Name ": cannot get array detail for %s: %s\n",
64c4757e
NB
85 dev, strerror(errno));
86 close(fd);
feb716e9 87 return rv;
64c4757e 88 }
82d9eba6 89 st = super_by_version(array.major_version, array.minor_version);
f9ce90ba 90
dd0781e5
NB
91 if (fstat(fd, &stb) != 0 && !S_ISBLK(stb.st_mode))
92 stb.st_rdev = 0;
feb716e9 93 rv = 0;
e5329c37 94
ea329559
NB
95 if (st) max_disks = st->max_devs;
96
e5329c37 97 /* try to load a superblock */
ea329559 98 for (d= 0; d<max_disks; d++) {
e5329c37
NB
99 mdu_disk_info_t disk;
100 char *dv;
101 disk.number = d;
102 if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
103 continue;
104 if (d >= array.raid_disks &&
105 disk.major == 0 &&
106 disk.minor == 0)
107 continue;
108 if ((dv=map_dev(disk.major, disk.minor))) {
4b1ac34b 109 if (!super && (disk.state & (1<<MD_DISK_ACTIVE))) {
e5329c37
NB
110 /* try to read the superblock from this device
111 * to get more info
112 */
113 int fd2 = open(dv, O_RDONLY);
82d9eba6
NB
114 if (fd2 >=0 && st &&
115 st->ss->load_super(st, fd2, &super, NULL) == 0) {
4b1ac34b 116 struct mdinfo info;
947fd4dd
NB
117 struct mddev_ident_s ident;
118 st->ss->getinfo_super(&info, &ident, super);
4b1ac34b
NB
119 if (info.array.ctime != array.ctime ||
120 info.array.level != array.level) {
121 free(super);
122 super = NULL;
123 }
124 }
e5329c37
NB
125 if (fd2 >= 0) close(fd2);
126 }
127 }
128 }
129
64c4757e 130 /* Ok, we have some info to print... */
682c7051 131 c = map_num(pers, array.level);
cd29a5c8 132 if (brief)
b83d95f3 133 printf("ARRAY %s level=%s num-devices=%d", dev, c?c:"-unknown-",array.raid_disks );
cd29a5c8 134 else {
e0d19036
NB
135 unsigned long array_size;
136 unsigned long long larray_size;
dd0781e5
NB
137 struct mdstat_ent *ms = mdstat_read(0);
138 struct mdstat_ent *e;
139 int devnum = array.md_minor;
0df46c2a 140 if (major(stb.st_rdev) != MD_MAJOR)
dd0781e5
NB
141 devnum = -1 - devnum;
142
143 for (e=ms; e; e=e->next)
144 if (e->devnum == devnum)
145 break;
11a3e71d 146#ifdef BLKGETSIZE64
56eb10c0
NB
147 if (ioctl(fd, BLKGETSIZE64, &larray_size)==0)
148 ;
11a3e71d
NB
149 else
150#endif
b83d95f3
NB
151 if (ioctl(fd, BLKGETSIZE, &array_size)==0) {
152 larray_size = array_size;
153 larray_size <<= 9;
154 }
155
56eb10c0
NB
156 else larray_size = 0;
157
cd29a5c8
NB
158 printf("%s:\n", dev);
159 printf(" Version : %02d.%02d.%02d\n",
160 array.major_version, array.minor_version, array.patch_version);
161 atime = array.ctime;
162 printf(" Creation Time : %.24s\n", ctime(&atime));
163 printf(" Raid Level : %s\n", c?c:"-unknown-");
56eb10c0 164 if (larray_size)
dd0781e5 165 printf(" Array Size : %llu%s\n", (larray_size>>10), human_size(larray_size));
cd29a5c8 166 if (array.level >= 1)
56eb10c0 167 printf(" Device Size : %d%s\n", array.size, human_size((long long)array.size<<10));
b83d95f3
NB
168 printf(" Raid Devices : %d\n", array.raid_disks);
169 printf(" Total Devices : %d\n", array.nr_disks);
cd29a5c8 170 printf("Preferred Minor : %d\n", array.md_minor);
b83d95f3 171 printf(" Persistence : Superblock is %spersistent\n",
cd29a5c8
NB
172 array.not_persistent?"not ":"");
173 printf("\n");
174 atime = array.utime;
175 printf(" Update Time : %.24s\n", ctime(&atime));
dd0781e5 176 printf(" State : %s%s%s\n",
182661f4 177 (array.state&(1<<MD_SB_CLEAN))?"clean":"active",
dd0781e5 178 array.active_disks < array.raid_disks? ", degraded":"",
e5329c37
NB
179 (!e || e->percent < 0) ? "" :
180 (e->resync) ? ", resyncing": ", recovering");
b83d95f3
NB
181 printf(" Active Devices : %d\n", array.active_disks);
182 printf("Working Devices : %d\n", array.working_disks);
183 printf(" Failed Devices : %d\n", array.failed_disks);
184 printf(" Spare Devices : %d\n", array.spare_disks);
cd29a5c8
NB
185 printf("\n");
186 if (array.level == 5) {
187 c = map_num(r5layout, array.layout);
188 printf(" Layout : %s\n", c?c:"-unknown-");
189 }
e5329c37
NB
190 if (array.level == 10) {
191 printf(" Layout : near=%d, far=%d\n",
192 array.layout&255, (array.layout>>8)&255);
193 }
cd29a5c8
NB
194 switch (array.level) {
195 case 0:
196 case 4:
197 case 5:
e5329c37
NB
198 case 10:
199 case 6:
200 printf(" Chunk Size : %dK\n\n", array.chunk_size/1024);
cd29a5c8
NB
201 break;
202 case -1:
e5329c37 203 printf(" Rounding : %dK\n\n", array.chunk_size/1024);
cd29a5c8
NB
204 break;
205 default: break;
206 }
82b27616 207
e5329c37 208 if (e && e->percent >= 0) {
dd0781e5 209 printf(" Rebuild Status : %d%% complete\n\n", e->percent);
e5329c37
NB
210 is_rebuilding = 1;
211 }
dd0781e5
NB
212 free_mdstat(ms);
213
82d9eba6
NB
214 if (super && st)
215 st->ss->detail_super(super);
e5329c37 216
b83d95f3 217 printf(" Number Major Minor RaidDevice State\n");
cd29a5c8 218 }
b0c63f32
NB
219 disks = malloc(max_disks * sizeof(mdu_disk_info_t));
220 for (d=0; d<max_disks; d++) {
221 disks[d].state = (1<<MD_DISK_REMOVED);
222 disks[d].major = disks[d].minor = 0;
223 }
224
225 next = array.raid_disks;
226 for (d=0; d < max_disks; d++) {
64c4757e
NB
227 mdu_disk_info_t disk;
228 disk.number = d;
229 if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
e0d19036 230 if (d < array.raid_disks)
b83d95f3 231 fprintf(stderr, Name ": cannot get device detail for device %d: %s\n",
e0d19036 232 d, strerror(errno));
64c4757e
NB
233 continue;
234 }
67687afe
NB
235 if (disk.major == 0 && disk.minor == 0)
236 continue;
b0c63f32
NB
237 if (disk.raid_disk >= 0 && disk.raid_disk < array.raid_disks)
238 disks[disk.raid_disk] = disk;
239 else if (next < max_disks)
240 disks[next++] = disk;
241 }
242
243 for (d= 0; d < max_disks; d++) {
244 char *dv;
245 mdu_disk_info_t disk = disks[d];
246
e0d19036
NB
247 if (d >= array.raid_disks &&
248 disk.major == 0 &&
249 disk.minor == 0)
250 continue;
cd29a5c8 251 if (!brief) {
b0c63f32 252 if (d == array.raid_disks) printf("\n");
e5329c37
NB
253 if (disk.raid_disk < 0)
254 printf(" %5d %5d %5d - ",
255 disk.number, disk.major, disk.minor);
256 else
257 printf(" %5d %5d %5d %5d ",
258 disk.number, disk.major, disk.minor, disk.raid_disk);
259 if (disk.state & (1<<MD_DISK_FAULTY)) {
260 printf(" faulty");
261 if (disk.raid_disk < array.raid_disks &&
262 disk.raid_disk >= 0)
263 failed++;
264 }
cd29a5c8
NB
265 if (disk.state & (1<<MD_DISK_ACTIVE)) printf(" active");
266 if (disk.state & (1<<MD_DISK_SYNC)) printf(" sync");
267 if (disk.state & (1<<MD_DISK_REMOVED)) printf(" removed");
b0c63f32
NB
268 if (disk.state & (1<<MD_DISK_WRITEMOSTLY)) printf(" writemostly");
269 if ((disk.state &
270 ((1<<MD_DISK_ACTIVE)|(1<<MD_DISK_SYNC)|(1<<MD_DISK_REMOVED)))
271 == 0) {
272 printf(" spare");
e5329c37
NB
273 if (is_26) {
274 if (disk.raid_disk < array.raid_disks && disk.raid_disk >= 0)
275 printf(" rebuilding");
276 } else if (is_rebuilding && failed) {
277 /* Taking a bit of a risk here, we remove the
278 * device from the array, and then put it back.
279 * If this fails, we are rebuilding
280 */
0df46c2a
NB
281 int err = ioctl(fd, HOT_REMOVE_DISK, makedev(disk.major, disk.minor));
282 if (err == 0) ioctl(fd, HOT_ADD_DISK, makedev(disk.major, disk.minor));
e5329c37
NB
283 if (err && errno == EBUSY)
284 printf(" rebuilding");
285 }
286 }
feb716e9 287 }
e5329c37 288 if (disk.state == 0) spares++;
feb716e9
NB
289 if (test && d < array.raid_disks && disk.state & (1<<MD_DISK_FAULTY)) {
290 if ((rv & 1) && (array.level ==4 || array.level == 5))
291 rv |= 2;
292 rv |= 1;
cd29a5c8 293 }
82b27616 294 if ((dv=map_dev(disk.major, disk.minor))) {
d013a55e
NB
295 if (brief) {
296 if (devices) {
297 devices = realloc(devices,
298 strlen(devices)+1+strlen(dv)+1);
299 strcat(strcat(devices,","),dv);
300 } else
301 devices = strdup(dv);
302 } else
303 printf(" %s", dv);
82b27616 304 }
cd29a5c8 305 if (!brief) printf("\n");
64c4757e 306 }
feb716e9 307 if (spares && brief) printf(" spares=%d", spares);
82d9eba6
NB
308 if (super && brief && st)
309 st->ss->brief_detail_super(super);
4b1ac34b 310
22892d56 311 if (brief > 1 && devices) printf("\n devices=%s", devices);
cd29a5c8 312 if (brief) printf("\n");
feb716e9 313 if (test && (rv&2)) rv &= ~1;
e5329c37 314 close(fd);
feb716e9 315 return rv;
64c4757e 316}