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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
fb97b4d6 41 int fd = open(dev, O_RDONLY);
64c4757e
NB
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 149 if (brief) {
e8eb8763 150 mdu_bitmap_file_t bmf;
142cb9e1 151 printf("ARRAY %s level=%s num-devices=%d", dev,
7615d989 152 c?c:"-unknown-",
7615d989 153 array.raid_disks );
142cb9e1
NB
154 if (sra && sra->array.major_version < 0)
155 printf(" metadata=%s", sra->text_version);
156 else
157 printf(" metadata=%02d.%02d",
158 array.major_version, array.minor_version);
e8eb8763
NB
159
160 /* Only try GET_BITMAP_FILE for 0.90.01 and later */
161 if (vers >= 9001 &&
162 ioctl(fd, GET_BITMAP_FILE, &bmf) == 0 &&
163 bmf.pathname[0]) {
164 printf(" bitmap=%s", bmf.pathname);
165 }
142cb9e1 166 } else {
8fac0577 167 mdu_bitmap_file_t bmf;
e0d19036 168 unsigned long long larray_size;
22a88995 169 struct mdstat_ent *ms = mdstat_read(0, 0);
dd0781e5
NB
170 struct mdstat_ent *e;
171 int devnum = array.md_minor;
0df46c2a 172 if (major(stb.st_rdev) != MD_MAJOR)
dd0781e5
NB
173 devnum = -1 - devnum;
174
175 for (e=ms; e; e=e->next)
176 if (e->devnum == devnum)
177 break;
beae1dfe
NB
178 if (!get_dev_size(fd, NULL, &larray_size))
179 larray_size = 0;
56eb10c0 180
cd29a5c8 181 printf("%s:\n", dev);
142cb9e1
NB
182
183 if (sra && sra->array.major_version < 0)
184 printf(" Version : %s\n", sra->text_version);
185 else
186 printf(" Version : %02d.%02d\n",
187 array.major_version, array.minor_version);
188
cd29a5c8
NB
189 atime = array.ctime;
190 printf(" Creation Time : %.24s\n", ctime(&atime));
142cb9e1 191 if (array.raid_disks == 0) c = "container";
cd29a5c8 192 printf(" Raid Level : %s\n", c?c:"-unknown-");
56eb10c0 193 if (larray_size)
dd0781e5 194 printf(" Array Size : %llu%s\n", (larray_size>>10), human_size(larray_size));
3d4064cc
NB
195 if (array.level >= 1) {
196 if (array.major_version != 0 &&
6ee5c05a
NB
197 (larray_size >= 0xFFFFFFFFULL|| array.size == 0)) {
198 unsigned long long dsize = get_component_size(fd);
199 if (dsize > 0)
e3362544
NB
200 printf(" Used Dev Size : %llu%s\n",
201 dsize,
7a3be72f 202 human_size((long long)dsize<<10));
6ee5c05a 203 else
e3362544 204 printf(" Used Dev Size : unknown\n");
6ee5c05a 205 } else
e3362544
NB
206 printf(" Used Dev Size : %d%s\n", array.size,
207 human_size((long long)array.size<<10));
3d4064cc 208 }
b83d95f3
NB
209 printf(" Raid Devices : %d\n", array.raid_disks);
210 printf(" Total Devices : %d\n", array.nr_disks);
cd29a5c8 211 printf("Preferred Minor : %d\n", array.md_minor);
142cb9e1
NB
212 if (sra == NULL || sra->array.major_version >= 0)
213 printf(" Persistence : Superblock is %spersistent\n",
214 array.not_persistent?"not ":"");
cd29a5c8 215 printf("\n");
4027ddca
NB
216 /* Only try GET_BITMAP_FILE for 0.90.01 and later */
217 if (vers >= 9001 &&
218 ioctl(fd, GET_BITMAP_FILE, &bmf) == 0 &&
219 bmf.pathname[0]) {
8fac0577
NB
220 printf(" Intent Bitmap : %s\n", bmf.pathname);
221 printf("\n");
222 } else if (array.state & (1<<MD_SB_BITMAP_PRESENT))
223 printf(" Intent Bitmap : Internal\n\n");
cd29a5c8
NB
224 atime = array.utime;
225 printf(" Update Time : %.24s\n", ctime(&atime));
120230a4 226 printf(" State : %s%s%s%s\n",
182661f4 227 (array.state&(1<<MD_SB_CLEAN))?"clean":"active",
dd0781e5 228 array.active_disks < array.raid_disks? ", degraded":"",
e5329c37 229 (!e || e->percent < 0) ? "" :
120230a4
NB
230 (e->resync) ? ", resyncing": ", recovering",
231 larray_size ? "": ", Not Started");
b83d95f3
NB
232 printf(" Active Devices : %d\n", array.active_disks);
233 printf("Working Devices : %d\n", array.working_disks);
234 printf(" Failed Devices : %d\n", array.failed_disks);
235 printf(" Spare Devices : %d\n", array.spare_disks);
cd29a5c8
NB
236 printf("\n");
237 if (array.level == 5) {
238 c = map_num(r5layout, array.layout);
239 printf(" Layout : %s\n", c?c:"-unknown-");
240 }
e5329c37 241 if (array.level == 10) {
e4965ef8
N
242 printf(" Layout :");
243 print_r10_layout(array.layout);
244 printf("\n");
e5329c37 245 }
cd29a5c8
NB
246 switch (array.level) {
247 case 0:
248 case 4:
249 case 5:
e5329c37
NB
250 case 10:
251 case 6:
142cb9e1
NB
252 if (array.chunk_size)
253 printf(" Chunk Size : %dK\n\n",
254 array.chunk_size/1024);
cd29a5c8
NB
255 break;
256 case -1:
e5329c37 257 printf(" Rounding : %dK\n\n", array.chunk_size/1024);
cd29a5c8
NB
258 break;
259 default: break;
260 }
aba69144 261
e5329c37 262 if (e && e->percent >= 0) {
bed256c2 263 printf(" Re%s Status : %d%% complete\n",
3da92f27
NB
264 (st && st->sb && info.reshape_active)?
265 "shape":"build",
bed256c2 266 e->percent);
e5329c37
NB
267 is_rebuilding = 1;
268 }
dd0781e5
NB
269 free_mdstat(ms);
270
3da92f27 271 if (st->sb && info.reshape_active) {
bed256c2
NB
272#if 0
273This is pretty boring
274 printf(" Reshape pos'n : %llu%s\n", (unsigned long long) info.reshape_progress<<9,
275 human_size(info.reshape_progress<<9));
276#endif
277 if (info.delta_disks > 0)
278 printf(" Delta Devices : %d, (%d->%d)\n",
279 info.delta_disks, array.raid_disks - info.delta_disks, array.raid_disks);
280 if (info.delta_disks < 0)
281 printf(" Delta Devices : %d, (%d->%d)\n",
282 info.delta_disks, array.raid_disks, array.raid_disks + info.delta_disks);
283 if (info.new_level != array.level) {
284 char *c = map_num(pers, info.new_level);
285 printf(" New Level : %s\n", c?c:"-unknown-");
286 }
287 if (info.new_level != array.level ||
288 info.new_layout != array.layout) {
289 if (info.new_level == 5) {
290 char *c = map_num(r5layout, info.new_layout);
291 printf(" New Layout : %s\n",
292 c?c:"-unknown-");
293 }
294 if (info.new_level == 10) {
b578481c 295 printf(" New Layout : near=%d, %s=%d\n",
bed256c2 296 info.new_layout&255,
b578481c 297 (info.new_layout&0x10000)?"offset":"far",
bed256c2
NB
298 (info.new_layout>>8)&255);
299 }
300 }
301 if (info.new_chunk != array.chunk_size)
302 printf(" New Chunksize : %dK\n", info.new_chunk/1024);
303 printf("\n");
304 } else if (e && e->percent >= 0)
305 printf("\n");
3da92f27
NB
306 if (st && st->sb)
307 st->ss->detail_super(st, homehost);
e5329c37 308
b83d95f3 309 printf(" Number Major Minor RaidDevice State\n");
cd29a5c8 310 }
b0c63f32
NB
311 disks = malloc(max_disks * sizeof(mdu_disk_info_t));
312 for (d=0; d<max_disks; d++) {
313 disks[d].state = (1<<MD_DISK_REMOVED);
314 disks[d].major = disks[d].minor = 0;
8352ab3e 315 disks[d].number = disks[d].raid_disk = d;
b0c63f32
NB
316 }
317
318 next = array.raid_disks;
319 for (d=0; d < max_disks; d++) {
64c4757e
NB
320 mdu_disk_info_t disk;
321 disk.number = d;
322 if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
e0d19036 323 if (d < array.raid_disks)
b83d95f3 324 fprintf(stderr, Name ": cannot get device detail for device %d: %s\n",
e0d19036 325 d, strerror(errno));
64c4757e
NB
326 continue;
327 }
67687afe
NB
328 if (disk.major == 0 && disk.minor == 0)
329 continue;
aba69144 330 if (disk.raid_disk >= 0 && disk.raid_disk < array.raid_disks)
b0c63f32
NB
331 disks[disk.raid_disk] = disk;
332 else if (next < max_disks)
333 disks[next++] = disk;
334 }
335
a77be586 336 avail = calloc(array.raid_disks, 1);
b0c63f32
NB
337 for (d= 0; d < max_disks; d++) {
338 char *dv;
339 mdu_disk_info_t disk = disks[d];
340
e0d19036
NB
341 if (d >= array.raid_disks &&
342 disk.major == 0 &&
343 disk.minor == 0)
344 continue;
cd29a5c8 345 if (!brief) {
b0c63f32 346 if (d == array.raid_disks) printf("\n");
e5329c37 347 if (disk.raid_disk < 0)
aba69144 348 printf(" %5d %5d %5d - ",
e5329c37
NB
349 disk.number, disk.major, disk.minor);
350 else
aba69144 351 printf(" %5d %5d %5d %5d ",
e5329c37 352 disk.number, disk.major, disk.minor, disk.raid_disk);
aba69144
NB
353 if (disk.state & (1<<MD_DISK_FAULTY)) {
354 printf(" faulty");
e5329c37
NB
355 if (disk.raid_disk < array.raid_disks &&
356 disk.raid_disk >= 0)
357 failed++;
358 }
cd29a5c8
NB
359 if (disk.state & (1<<MD_DISK_ACTIVE)) printf(" active");
360 if (disk.state & (1<<MD_DISK_SYNC)) printf(" sync");
361 if (disk.state & (1<<MD_DISK_REMOVED)) printf(" removed");
b0c63f32
NB
362 if (disk.state & (1<<MD_DISK_WRITEMOSTLY)) printf(" writemostly");
363 if ((disk.state &
364 ((1<<MD_DISK_ACTIVE)|(1<<MD_DISK_SYNC)|(1<<MD_DISK_REMOVED)))
365 == 0) {
366 printf(" spare");
e5329c37
NB
367 if (is_26) {
368 if (disk.raid_disk < array.raid_disks && disk.raid_disk >= 0)
369 printf(" rebuilding");
370 } else if (is_rebuilding && failed) {
371 /* Taking a bit of a risk here, we remove the
372 * device from the array, and then put it back.
373 * If this fails, we are rebuilding
374 */
0df46c2a
NB
375 int err = ioctl(fd, HOT_REMOVE_DISK, makedev(disk.major, disk.minor));
376 if (err == 0) ioctl(fd, HOT_ADD_DISK, makedev(disk.major, disk.minor));
e5329c37
NB
377 if (err && errno == EBUSY)
378 printf(" rebuilding");
379 }
380 }
feb716e9 381 }
e5329c37 382 if (disk.state == 0) spares++;
a77be586
NB
383 if (test && d < array.raid_disks
384 && !(disk.state & (1<<MD_DISK_SYNC)))
feb716e9 385 rv |= 1;
a77be586
NB
386 if (d < array.raid_disks
387 && (disk.state & (1<<MD_DISK_SYNC))) {
388 avail_disks ++;
389 avail[d] = 1;
cd29a5c8 390 }
16c6fa80 391 if ((dv=map_dev(disk.major, disk.minor, 0))) {
d013a55e
NB
392 if (brief) {
393 if (devices) {
394 devices = realloc(devices,
395 strlen(devices)+1+strlen(dv)+1);
396 strcat(strcat(devices,","),dv);
397 } else
398 devices = strdup(dv);
399 } else
400 printf(" %s", dv);
82b27616 401 }
cd29a5c8 402 if (!brief) printf("\n");
64c4757e 403 }
feb716e9 404 if (spares && brief) printf(" spares=%d", spares);
3da92f27
NB
405 if (brief && st && st->sb)
406 st->ss->brief_detail_super(st);
407 st->ss->free_super(st);
4b1ac34b 408
22892d56 409 if (brief > 1 && devices) printf("\n devices=%s", devices);
cd29a5c8 410 if (brief) printf("\n");
a77be586
NB
411 if (test &&
412 !enough(array.level, array.raid_disks, array.layout,
413 1, avail, avail_disks))
414 rv = 2;
415
a328c097 416out:
e5329c37 417 close(fd);
feb716e9 418 return rv;
64c4757e 419}