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64c4757e 1/*
9a9dab36 2 * mdadm - manage Linux "md" devices aka RAID arrays.
64c4757e 3 *
4f589ad0 4 * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de>
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
54bad364 34int Detail(char *dev, int brief, int export, int test, char *homehost)
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;
e27d562b 56 int max_disks = MD_SB_DISKS; /* just a default */
bed256c2 57 struct mdinfo info;
142cb9e1 58 struct mdinfo *sra;
64c4757e 59
feb716e9 60 int rv = test ? 4 : 1;
a77be586
NB
61 int avail_disks = 0;
62 char *avail;
82b27616 63
64c4757e 64 if (fd < 0) {
682c7051 65 fprintf(stderr, Name ": cannot open %s: %s\n",
64c4757e 66 dev, strerror(errno));
feb716e9 67 return rv;
64c4757e
NB
68 }
69 vers = md_get_version(fd);
70 if (vers < 0) {
682c7051 71 fprintf(stderr, Name ": %s does not appear to be an md device\n",
64c4757e
NB
72 dev);
73 close(fd);
feb716e9 74 return rv;
64c4757e 75 }
682c7051
NB
76 if (vers < 9000) {
77 fprintf(stderr, Name ": cannot get detail for md device %s: driver version too old.\n",
64c4757e
NB
78 dev);
79 close(fd);
feb716e9 80 return rv;
64c4757e
NB
81 }
82 if (ioctl(fd, GET_ARRAY_INFO, &array)<0) {
83 if (errno == ENODEV)
682c7051 84 fprintf(stderr, Name ": md device %s does not appear to be active.\n",
64c4757e
NB
85 dev);
86 else
682c7051 87 fprintf(stderr, Name ": cannot get array detail for %s: %s\n",
64c4757e
NB
88 dev, strerror(errno));
89 close(fd);
feb716e9 90 return rv;
64c4757e 91 }
142cb9e1 92 sra = sysfs_read(fd, 0, GET_VERSION);
1686dc25 93 st = super_by_fd(fd);
f9ce90ba 94
dd0781e5
NB
95 if (fstat(fd, &stb) != 0 && !S_ISBLK(stb.st_mode))
96 stb.st_rdev = 0;
feb716e9 97 rv = 0;
e5329c37 98
ea329559
NB
99 if (st) max_disks = st->max_devs;
100
e5329c37 101 /* try to load a superblock */
ea329559 102 for (d= 0; d<max_disks; d++) {
e5329c37
NB
103 mdu_disk_info_t disk;
104 char *dv;
105 disk.number = d;
106 if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
107 continue;
108 if (d >= array.raid_disks &&
109 disk.major == 0 &&
110 disk.minor == 0)
111 continue;
16c6fa80 112 if ((dv=map_dev(disk.major, disk.minor, 1))) {
3da92f27
NB
113 if ((!st || !st->sb) &&
114 (disk.state & (1<<MD_DISK_ACTIVE))) {
e5329c37
NB
115 /* try to read the superblock from this device
116 * to get more info
117 */
16c6fa80 118 int fd2 = dev_open(dv, O_RDONLY);
82d9eba6 119 if (fd2 >=0 && st &&
3da92f27
NB
120 st->ss->load_super(st, fd2, NULL) == 0) {
121 st->ss->getinfo_super(st, &info);
4b1ac34b 122 if (info.array.ctime != array.ctime ||
3da92f27
NB
123 info.array.level != array.level)
124 st->ss->free_super(st);
4b1ac34b 125 }
e5329c37
NB
126 if (fd2 >= 0) close(fd2);
127 }
128 }
129 }
130
64c4757e 131 /* Ok, we have some info to print... */
682c7051 132 c = map_num(pers, array.level);
54bad364
KS
133
134 if (export) {
135 if (c)
136 printf("MD_LEVEL=%s\n", c);
137 printf("MD_DEVICES=%d\n", array.raid_disks);
142cb9e1
NB
138 if (sra && sra->array.major_version < 0)
139 printf("MD_METADATA=%s\n", sra->text_version);
140 else
141 printf("MD_METADATA=%02d.%02d\n",
142 array.major_version, array.minor_version);
143
3da92f27 144 if (st && st->sb)
0d726f17 145 st->ss->export_detail_super(st);
54bad364
KS
146 goto out;
147 }
148
142cb9e1
NB
149 if (brief) {
150 printf("ARRAY %s level=%s num-devices=%d", dev,
7615d989 151 c?c:"-unknown-",
7615d989 152 array.raid_disks );
142cb9e1
NB
153 if (sra && sra->array.major_version < 0)
154 printf(" metadata=%s", sra->text_version);
155 else
156 printf(" metadata=%02d.%02d",
157 array.major_version, array.minor_version);
158 } else {
8fac0577 159 mdu_bitmap_file_t bmf;
e0d19036 160 unsigned long long larray_size;
22a88995 161 struct mdstat_ent *ms = mdstat_read(0, 0);
dd0781e5
NB
162 struct mdstat_ent *e;
163 int devnum = array.md_minor;
0df46c2a 164 if (major(stb.st_rdev) != MD_MAJOR)
dd0781e5
NB
165 devnum = -1 - devnum;
166
167 for (e=ms; e; e=e->next)
168 if (e->devnum == devnum)
169 break;
beae1dfe
NB
170 if (!get_dev_size(fd, NULL, &larray_size))
171 larray_size = 0;
56eb10c0 172
cd29a5c8 173 printf("%s:\n", dev);
142cb9e1
NB
174
175 if (sra && sra->array.major_version < 0)
176 printf(" Version : %s\n", sra->text_version);
177 else
178 printf(" Version : %02d.%02d\n",
179 array.major_version, array.minor_version);
180
cd29a5c8
NB
181 atime = array.ctime;
182 printf(" Creation Time : %.24s\n", ctime(&atime));
142cb9e1 183 if (array.raid_disks == 0) c = "container";
cd29a5c8 184 printf(" Raid Level : %s\n", c?c:"-unknown-");
56eb10c0 185 if (larray_size)
dd0781e5 186 printf(" Array Size : %llu%s\n", (larray_size>>10), human_size(larray_size));
3d4064cc
NB
187 if (array.level >= 1) {
188 if (array.major_version != 0 &&
6ee5c05a
NB
189 (larray_size >= 0xFFFFFFFFULL|| array.size == 0)) {
190 unsigned long long dsize = get_component_size(fd);
191 if (dsize > 0)
e3362544
NB
192 printf(" Used Dev Size : %llu%s\n",
193 dsize,
7a3be72f 194 human_size((long long)dsize<<10));
6ee5c05a 195 else
e3362544 196 printf(" Used Dev Size : unknown\n");
6ee5c05a 197 } else
e3362544
NB
198 printf(" Used Dev Size : %d%s\n", array.size,
199 human_size((long long)array.size<<10));
3d4064cc 200 }
b83d95f3
NB
201 printf(" Raid Devices : %d\n", array.raid_disks);
202 printf(" Total Devices : %d\n", array.nr_disks);
cd29a5c8 203 printf("Preferred Minor : %d\n", array.md_minor);
142cb9e1
NB
204 if (sra == NULL || sra->array.major_version >= 0)
205 printf(" Persistence : Superblock is %spersistent\n",
206 array.not_persistent?"not ":"");
cd29a5c8 207 printf("\n");
4027ddca
NB
208 /* Only try GET_BITMAP_FILE for 0.90.01 and later */
209 if (vers >= 9001 &&
210 ioctl(fd, GET_BITMAP_FILE, &bmf) == 0 &&
211 bmf.pathname[0]) {
8fac0577
NB
212 printf(" Intent Bitmap : %s\n", bmf.pathname);
213 printf("\n");
214 } else if (array.state & (1<<MD_SB_BITMAP_PRESENT))
215 printf(" Intent Bitmap : Internal\n\n");
cd29a5c8
NB
216 atime = array.utime;
217 printf(" Update Time : %.24s\n", ctime(&atime));
120230a4 218 printf(" State : %s%s%s%s\n",
182661f4 219 (array.state&(1<<MD_SB_CLEAN))?"clean":"active",
dd0781e5 220 array.active_disks < array.raid_disks? ", degraded":"",
e5329c37 221 (!e || e->percent < 0) ? "" :
120230a4
NB
222 (e->resync) ? ", resyncing": ", recovering",
223 larray_size ? "": ", Not Started");
b83d95f3
NB
224 printf(" Active Devices : %d\n", array.active_disks);
225 printf("Working Devices : %d\n", array.working_disks);
226 printf(" Failed Devices : %d\n", array.failed_disks);
227 printf(" Spare Devices : %d\n", array.spare_disks);
cd29a5c8
NB
228 printf("\n");
229 if (array.level == 5) {
230 c = map_num(r5layout, array.layout);
231 printf(" Layout : %s\n", c?c:"-unknown-");
232 }
e5329c37 233 if (array.level == 10) {
b578481c
NB
234 printf(" Layout : near=%d, %s=%d\n",
235 array.layout&255, (array.layout&0x10000)?"offset":"far",
236 (array.layout>>8)&255);
e5329c37 237 }
cd29a5c8
NB
238 switch (array.level) {
239 case 0:
240 case 4:
241 case 5:
e5329c37
NB
242 case 10:
243 case 6:
142cb9e1
NB
244 if (array.chunk_size)
245 printf(" Chunk Size : %dK\n\n",
246 array.chunk_size/1024);
cd29a5c8
NB
247 break;
248 case -1:
e5329c37 249 printf(" Rounding : %dK\n\n", array.chunk_size/1024);
cd29a5c8
NB
250 break;
251 default: break;
252 }
aba69144 253
e5329c37 254 if (e && e->percent >= 0) {
bed256c2 255 printf(" Re%s Status : %d%% complete\n",
3da92f27
NB
256 (st && st->sb && info.reshape_active)?
257 "shape":"build",
bed256c2 258 e->percent);
e5329c37
NB
259 is_rebuilding = 1;
260 }
dd0781e5
NB
261 free_mdstat(ms);
262
3da92f27 263 if (st->sb && info.reshape_active) {
bed256c2
NB
264#if 0
265This is pretty boring
266 printf(" Reshape pos'n : %llu%s\n", (unsigned long long) info.reshape_progress<<9,
267 human_size(info.reshape_progress<<9));
268#endif
269 if (info.delta_disks > 0)
270 printf(" Delta Devices : %d, (%d->%d)\n",
271 info.delta_disks, array.raid_disks - info.delta_disks, array.raid_disks);
272 if (info.delta_disks < 0)
273 printf(" Delta Devices : %d, (%d->%d)\n",
274 info.delta_disks, array.raid_disks, array.raid_disks + info.delta_disks);
275 if (info.new_level != array.level) {
276 char *c = map_num(pers, info.new_level);
277 printf(" New Level : %s\n", c?c:"-unknown-");
278 }
279 if (info.new_level != array.level ||
280 info.new_layout != array.layout) {
281 if (info.new_level == 5) {
282 char *c = map_num(r5layout, info.new_layout);
283 printf(" New Layout : %s\n",
284 c?c:"-unknown-");
285 }
286 if (info.new_level == 10) {
b578481c 287 printf(" New Layout : near=%d, %s=%d\n",
bed256c2 288 info.new_layout&255,
b578481c 289 (info.new_layout&0x10000)?"offset":"far",
bed256c2
NB
290 (info.new_layout>>8)&255);
291 }
292 }
293 if (info.new_chunk != array.chunk_size)
294 printf(" New Chunksize : %dK\n", info.new_chunk/1024);
295 printf("\n");
296 } else if (e && e->percent >= 0)
297 printf("\n");
3da92f27
NB
298 if (st && st->sb)
299 st->ss->detail_super(st, homehost);
e5329c37 300
b83d95f3 301 printf(" Number Major Minor RaidDevice State\n");
cd29a5c8 302 }
b0c63f32
NB
303 disks = malloc(max_disks * sizeof(mdu_disk_info_t));
304 for (d=0; d<max_disks; d++) {
305 disks[d].state = (1<<MD_DISK_REMOVED);
306 disks[d].major = disks[d].minor = 0;
8352ab3e 307 disks[d].number = disks[d].raid_disk = d;
b0c63f32
NB
308 }
309
310 next = array.raid_disks;
311 for (d=0; d < max_disks; d++) {
64c4757e
NB
312 mdu_disk_info_t disk;
313 disk.number = d;
314 if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
e0d19036 315 if (d < array.raid_disks)
b83d95f3 316 fprintf(stderr, Name ": cannot get device detail for device %d: %s\n",
e0d19036 317 d, strerror(errno));
64c4757e
NB
318 continue;
319 }
67687afe
NB
320 if (disk.major == 0 && disk.minor == 0)
321 continue;
aba69144 322 if (disk.raid_disk >= 0 && disk.raid_disk < array.raid_disks)
b0c63f32
NB
323 disks[disk.raid_disk] = disk;
324 else if (next < max_disks)
325 disks[next++] = disk;
326 }
327
a77be586 328 avail = calloc(array.raid_disks, 1);
b0c63f32
NB
329 for (d= 0; d < max_disks; d++) {
330 char *dv;
331 mdu_disk_info_t disk = disks[d];
332
e0d19036
NB
333 if (d >= array.raid_disks &&
334 disk.major == 0 &&
335 disk.minor == 0)
336 continue;
cd29a5c8 337 if (!brief) {
b0c63f32 338 if (d == array.raid_disks) printf("\n");
e5329c37 339 if (disk.raid_disk < 0)
aba69144 340 printf(" %5d %5d %5d - ",
e5329c37
NB
341 disk.number, disk.major, disk.minor);
342 else
aba69144 343 printf(" %5d %5d %5d %5d ",
e5329c37 344 disk.number, disk.major, disk.minor, disk.raid_disk);
aba69144
NB
345 if (disk.state & (1<<MD_DISK_FAULTY)) {
346 printf(" faulty");
e5329c37
NB
347 if (disk.raid_disk < array.raid_disks &&
348 disk.raid_disk >= 0)
349 failed++;
350 }
cd29a5c8
NB
351 if (disk.state & (1<<MD_DISK_ACTIVE)) printf(" active");
352 if (disk.state & (1<<MD_DISK_SYNC)) printf(" sync");
353 if (disk.state & (1<<MD_DISK_REMOVED)) printf(" removed");
b0c63f32
NB
354 if (disk.state & (1<<MD_DISK_WRITEMOSTLY)) printf(" writemostly");
355 if ((disk.state &
356 ((1<<MD_DISK_ACTIVE)|(1<<MD_DISK_SYNC)|(1<<MD_DISK_REMOVED)))
357 == 0) {
358 printf(" spare");
e5329c37
NB
359 if (is_26) {
360 if (disk.raid_disk < array.raid_disks && disk.raid_disk >= 0)
361 printf(" rebuilding");
362 } else if (is_rebuilding && failed) {
363 /* Taking a bit of a risk here, we remove the
364 * device from the array, and then put it back.
365 * If this fails, we are rebuilding
366 */
0df46c2a
NB
367 int err = ioctl(fd, HOT_REMOVE_DISK, makedev(disk.major, disk.minor));
368 if (err == 0) ioctl(fd, HOT_ADD_DISK, makedev(disk.major, disk.minor));
e5329c37
NB
369 if (err && errno == EBUSY)
370 printf(" rebuilding");
371 }
372 }
feb716e9 373 }
e5329c37 374 if (disk.state == 0) spares++;
a77be586
NB
375 if (test && d < array.raid_disks
376 && !(disk.state & (1<<MD_DISK_SYNC)))
feb716e9 377 rv |= 1;
a77be586
NB
378 if (d < array.raid_disks
379 && (disk.state & (1<<MD_DISK_SYNC))) {
380 avail_disks ++;
381 avail[d] = 1;
cd29a5c8 382 }
16c6fa80 383 if ((dv=map_dev(disk.major, disk.minor, 0))) {
d013a55e
NB
384 if (brief) {
385 if (devices) {
386 devices = realloc(devices,
387 strlen(devices)+1+strlen(dv)+1);
388 strcat(strcat(devices,","),dv);
389 } else
390 devices = strdup(dv);
391 } else
392 printf(" %s", dv);
82b27616 393 }
cd29a5c8 394 if (!brief) printf("\n");
64c4757e 395 }
feb716e9 396 if (spares && brief) printf(" spares=%d", spares);
3da92f27
NB
397 if (brief && st && st->sb)
398 st->ss->brief_detail_super(st);
399 st->ss->free_super(st);
4b1ac34b 400
22892d56 401 if (brief > 1 && devices) printf("\n devices=%s", devices);
cd29a5c8 402 if (brief) printf("\n");
a77be586
NB
403 if (test &&
404 !enough(array.level, array.raid_disks, array.layout,
405 1, avail, avail_disks))
406 rv = 2;
407
a328c097 408out:
e5329c37 409 close(fd);
feb716e9 410 return rv;
64c4757e 411}