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1 /*
2 * mdadm - manage Linux "md" devices aka RAID arrays.
3 *
4 * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de>
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@suse.de>
23 */
24
25 #include "mdadm.h"
26 #include "md_p.h"
27 #include "md_u.h"
28 #include <dirent.h>
29
30 int Detail(char *dev, int brief, int export, int test, char *homehost)
31 {
32 /*
33 * Print out details for an md array by using
34 * GET_ARRAY_INFO and GET_DISK_INFO ioctl calls
35 */
36
37 int fd = open(dev, O_RDONLY);
38 int vers;
39 mdu_array_info_t array;
40 mdu_disk_info_t *disks;
41 int next;
42 int d;
43 time_t atime;
44 char *c;
45 char *devices = NULL;
46 int spares = 0;
47 struct stat stb;
48 int is_26 = get_linux_version() >= 2006000;
49 int is_rebuilding = 0;
50 int failed = 0;
51 struct supertype *st = NULL;
52 int max_disks = MD_SB_DISKS; /* just a default */
53 struct mdinfo info;
54 struct mdinfo *sra;
55 char *member = NULL;
56 char *container = NULL;
57
58 int rv = test ? 4 : 1;
59 int avail_disks = 0;
60 char *avail;
61
62 if (fd < 0) {
63 fprintf(stderr, Name ": cannot open %s: %s\n",
64 dev, strerror(errno));
65 return rv;
66 }
67 vers = md_get_version(fd);
68 if (vers < 0) {
69 fprintf(stderr, Name ": %s does not appear to be an md device\n",
70 dev);
71 close(fd);
72 return rv;
73 }
74 if (vers < 9000) {
75 fprintf(stderr, Name ": cannot get detail for md device %s: driver version too old.\n",
76 dev);
77 close(fd);
78 return rv;
79 }
80 if (ioctl(fd, GET_ARRAY_INFO, &array)<0) {
81 if (errno == ENODEV)
82 fprintf(stderr, Name ": md device %s does not appear to be active.\n",
83 dev);
84 else
85 fprintf(stderr, Name ": cannot get array detail for %s: %s\n",
86 dev, strerror(errno));
87 close(fd);
88 return rv;
89 }
90 sra = sysfs_read(fd, 0, GET_VERSION);
91 st = super_by_fd(fd);
92
93 if (fstat(fd, &stb) != 0 && !S_ISBLK(stb.st_mode))
94 stb.st_rdev = 0;
95 rv = 0;
96
97 if (st)
98 max_disks = st->max_devs;
99
100 if (sra && is_subarray(sra->text_version) &&
101 strchr(sra->text_version+1, '/')) {
102 /* This is a subarray of some container.
103 * We want the name of the container, and the member
104 */
105 char *s = strchr(sra->text_version+1, '/');
106 int dn;
107 *s++ = '\0';
108 member = s;
109 dn = devname2devnum(sra->text_version+1);
110 container = map_dev(dev2major(dn), dev2minor(dn), 1);
111 }
112
113 /* try to load a superblock */
114 for (d= 0; d<max_disks; d++) {
115 mdu_disk_info_t disk;
116 char *dv;
117 disk.number = d;
118 if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
119 continue;
120 if (d >= array.raid_disks &&
121 disk.major == 0 &&
122 disk.minor == 0)
123 continue;
124 if ((dv=map_dev(disk.major, disk.minor, 1))) {
125 /* some formats (imsm) have free-floating-spares
126 * with a uuid of uuid_match_any, they don't
127 * have very good info about the rest of the
128 * container, so keep searching when
129 * encountering such a device. Otherwise, stop
130 * after the first successful call to
131 * ->load_super.
132 */
133 int free_spare = memcmp(uuid_match_any,
134 info.uuid,
135 sizeof(uuid_match_any)) == 0;
136 if ((!st || !st->sb || free_spare) &&
137 (array.raid_disks == 0 ||
138 (disk.state & (1<<MD_DISK_ACTIVE)))) {
139 /* try to read the superblock from this device
140 * to get more info
141 */
142 if (free_spare)
143 st->ss->free_super(st);
144 int fd2 = dev_open(dv, O_RDONLY);
145 if (fd2 >=0 && st &&
146 st->ss->load_super(st, fd2, NULL) == 0) {
147 st->ss->getinfo_super(st, &info);
148 if (array.raid_disks != 0 && /* container */
149 (info.array.ctime != array.ctime ||
150 info.array.level != array.level))
151 st->ss->free_super(st);
152 }
153 if (fd2 >= 0) close(fd2);
154 }
155 }
156 }
157
158 /* Ok, we have some info to print... */
159 c = map_num(pers, array.level);
160
161 if (export) {
162 if (array.raid_disks) {
163 if (c)
164 printf("MD_LEVEL=%s\n", c);
165 printf("MD_DEVICES=%d\n", array.raid_disks);
166 } else {
167 printf("MD_LEVEL=container\n");
168 printf("MD_DEVICES=%d\n", array.nr_disks);
169 }
170 if (container) {
171 printf("MD_CONTAINER=%s\n", container);
172 printf("MD_MEMBER=%s\n", member);
173 } else {
174 if (sra && sra->array.major_version < 0)
175 printf("MD_METADATA=%s\n", sra->text_version);
176 else
177 printf("MD_METADATA=%d.%d\n",
178 array.major_version, array.minor_version);
179 }
180
181 if (st && st->sb) {
182 struct mdinfo info;
183 char nbuf[64];
184 struct map_ent *mp, *map = NULL;
185 st->ss->getinfo_super(st, &info);
186 fname_from_uuid(st, &info, nbuf, ':');
187 printf("MD_UUID=%s\n", nbuf+5);
188 mp = map_by_uuid(&map, info.uuid);
189 if (mp && mp->path &&
190 strncmp(mp->path, "/dev/md/", 8) == 0)
191 printf("MD_DEVNAME=%s\n", mp->path+8);
192
193 if (st->ss->export_detail_super)
194 st->ss->export_detail_super(st);
195 } else {
196 struct map_ent *mp, *map = NULL;
197 char nbuf[64];
198 mp = map_by_devnum(&map, fd2devnum(fd));
199 if (mp) {
200 __fname_from_uuid(mp->uuid, 0, nbuf, ':');
201 printf("MD_UUID=%s\n", nbuf+5);
202 }
203 if (mp && mp->path &&
204 strncmp(mp->path, "/dev/md/", 8) == 0)
205 printf("MD_DEVNAME=%s\n", mp->path+8);
206 }
207 goto out;
208 }
209
210 disks = malloc(max_disks * sizeof(mdu_disk_info_t));
211 for (d=0; d<max_disks; d++) {
212 disks[d].state = (1<<MD_DISK_REMOVED);
213 disks[d].major = disks[d].minor = 0;
214 disks[d].number = disks[d].raid_disk = d;
215 }
216
217 next = array.raid_disks;
218 for (d=0; d < max_disks; d++) {
219 mdu_disk_info_t disk;
220 disk.number = d;
221 if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
222 if (d < array.raid_disks)
223 fprintf(stderr, Name ": cannot get device detail for device %d: %s\n",
224 d, strerror(errno));
225 continue;
226 }
227 if (disk.major == 0 && disk.minor == 0)
228 continue;
229 if (disk.raid_disk >= 0 && disk.raid_disk < array.raid_disks)
230 disks[disk.raid_disk] = disk;
231 else if (next < max_disks)
232 disks[next++] = disk;
233 }
234
235 avail = calloc(array.raid_disks, 1);
236
237 for (d= 0; d < array.raid_disks; d++) {
238 mdu_disk_info_t disk = disks[d];
239
240 if ((disk.state & (1<<MD_DISK_SYNC))) {
241 avail_disks ++;
242 avail[d] = 1;
243 }
244 }
245
246 if (brief) {
247 mdu_bitmap_file_t bmf;
248 printf("ARRAY %s", dev);
249 if (brief > 1) {
250 if (array.raid_disks)
251 printf(" level=%s num-devices=%d",
252 c?c:"-unknown-",
253 array.raid_disks );
254 else
255 printf(" level=container num-devices=%d",
256 array.nr_disks);
257 }
258 if (container) {
259 printf(" container=%s", container);
260 printf(" member=%s", member);
261 } else {
262 if (sra && sra->array.major_version < 0)
263 printf(" metadata=%s", sra->text_version);
264 else
265 printf(" metadata=%d.%d",
266 array.major_version, array.minor_version);
267 }
268
269 /* Only try GET_BITMAP_FILE for 0.90.01 and later */
270 if (vers >= 9001 &&
271 ioctl(fd, GET_BITMAP_FILE, &bmf) == 0 &&
272 bmf.pathname[0]) {
273 printf(" bitmap=%s", bmf.pathname);
274 }
275 } else {
276 mdu_bitmap_file_t bmf;
277 unsigned long long larray_size;
278 struct mdstat_ent *ms = mdstat_read(0, 0);
279 struct mdstat_ent *e;
280 int devnum = array.md_minor;
281 if (major(stb.st_rdev) == get_mdp_major())
282 devnum = -1 - devnum;
283
284 for (e=ms; e; e=e->next)
285 if (e->devnum == devnum)
286 break;
287 if (!get_dev_size(fd, NULL, &larray_size))
288 larray_size = 0;
289
290 printf("%s:\n", dev);
291
292 if (container)
293 printf(" Container : %s, member %s\n", container, member);
294 else {
295 if (sra && sra->array.major_version < 0)
296 printf(" Version : %s\n", sra->text_version);
297 else
298 printf(" Version : %d.%d\n",
299 array.major_version, array.minor_version);
300 }
301
302 atime = array.ctime;
303 if (atime)
304 printf(" Creation Time : %.24s\n", ctime(&atime));
305 if (array.raid_disks == 0) c = "container";
306 printf(" Raid Level : %s\n", c?c:"-unknown-");
307 if (larray_size)
308 printf(" Array Size : %llu%s\n", (larray_size>>10), human_size(larray_size));
309 if (array.level >= 1) {
310 if (array.major_version != 0 &&
311 (larray_size >= 0xFFFFFFFFULL|| array.size == 0)) {
312 unsigned long long dsize = get_component_size(fd);
313 if (dsize > 0)
314 printf(" Used Dev Size : %llu%s\n",
315 dsize/2,
316 human_size((long long)dsize<<9));
317 else
318 printf(" Used Dev Size : unknown\n");
319 } else
320 printf(" Used Dev Size : %d%s\n", array.size,
321 human_size((long long)array.size<<10));
322 }
323 if (array.raid_disks)
324 printf(" Raid Devices : %d\n", array.raid_disks);
325 printf(" Total Devices : %d\n", array.nr_disks);
326 if (!container &&
327 ((sra == NULL && array.major_version == 0) ||
328 (sra && sra->array.major_version == 0)))
329 printf("Preferred Minor : %d\n", array.md_minor);
330 if (sra == NULL || sra->array.major_version >= 0)
331 printf(" Persistence : Superblock is %spersistent\n",
332 array.not_persistent?"not ":"");
333 printf("\n");
334 /* Only try GET_BITMAP_FILE for 0.90.01 and later */
335 if (vers >= 9001 &&
336 ioctl(fd, GET_BITMAP_FILE, &bmf) == 0 &&
337 bmf.pathname[0]) {
338 printf(" Intent Bitmap : %s\n", bmf.pathname);
339 printf("\n");
340 } else if (array.state & (1<<MD_SB_BITMAP_PRESENT))
341 printf(" Intent Bitmap : Internal\n\n");
342 atime = array.utime;
343 if (atime)
344 printf(" Update Time : %.24s\n", ctime(&atime));
345 if (array.raid_disks) {
346 char *st;
347 if (avail_disks == array.raid_disks)
348 st = "";
349 else if (!enough(array.level, array.raid_disks,
350 array.layout, 1, avail, avail_disks))
351 st = ", FAILED";
352 else
353 st = ", degraded";
354
355 printf(" State : %s%s%s%s\n",
356 (array.state&(1<<MD_SB_CLEAN))?"clean":"active",
357 st,
358 (!e || e->percent < 0) ? "" :
359 (e->resync) ? ", resyncing": ", recovering",
360 larray_size ? "": ", Not Started");
361 }
362 if (array.raid_disks)
363 printf(" Active Devices : %d\n", array.active_disks);
364 printf("Working Devices : %d\n", array.working_disks);
365 if (array.raid_disks) {
366 printf(" Failed Devices : %d\n", array.failed_disks);
367 printf(" Spare Devices : %d\n", array.spare_disks);
368 }
369 printf("\n");
370 if (array.level == 5) {
371 c = map_num(r5layout, array.layout);
372 printf(" Layout : %s\n", c?c:"-unknown-");
373 }
374 if (array.level == 6) {
375 c = map_num(r6layout, array.layout);
376 printf(" Layout : %s\n", c?c:"-unknown-");
377 }
378 if (array.level == 10) {
379 printf(" Layout :");
380 print_r10_layout(array.layout);
381 printf("\n");
382 }
383 switch (array.level) {
384 case 0:
385 case 4:
386 case 5:
387 case 10:
388 case 6:
389 if (array.chunk_size)
390 printf(" Chunk Size : %dK\n\n",
391 array.chunk_size/1024);
392 break;
393 case -1:
394 printf(" Rounding : %dK\n\n", array.chunk_size/1024);
395 break;
396 default: break;
397 }
398
399 if (e && e->percent >= 0) {
400 printf(" Re%s Status : %d%% complete\n",
401 (st && st->sb && info.reshape_active)?
402 "shape":"build",
403 e->percent);
404 is_rebuilding = 1;
405 }
406 free_mdstat(ms);
407
408 if (st->sb && info.reshape_active) {
409 #if 0
410 This is pretty boring
411 printf(" Reshape pos'n : %llu%s\n", (unsigned long long) info.reshape_progress<<9,
412 human_size(info.reshape_progress<<9));
413 #endif
414 if (info.delta_disks > 0)
415 printf(" Delta Devices : %d, (%d->%d)\n",
416 info.delta_disks, array.raid_disks - info.delta_disks, array.raid_disks);
417 if (info.delta_disks < 0)
418 printf(" Delta Devices : %d, (%d->%d)\n",
419 info.delta_disks, array.raid_disks, array.raid_disks + info.delta_disks);
420 if (info.new_level != array.level) {
421 char *c = map_num(pers, info.new_level);
422 printf(" New Level : %s\n", c?c:"-unknown-");
423 }
424 if (info.new_level != array.level ||
425 info.new_layout != array.layout) {
426 if (info.new_level == 5) {
427 char *c = map_num(r5layout, info.new_layout);
428 printf(" New Layout : %s\n",
429 c?c:"-unknown-");
430 }
431 if (info.new_level == 6) {
432 char *c = map_num(r6layout, info.new_layout);
433 printf(" New Layout : %s\n",
434 c?c:"-unknown-");
435 }
436 if (info.new_level == 10) {
437 printf(" New Layout : near=%d, %s=%d\n",
438 info.new_layout&255,
439 (info.new_layout&0x10000)?"offset":"far",
440 (info.new_layout>>8)&255);
441 }
442 }
443 if (info.new_chunk != array.chunk_size)
444 printf(" New Chunksize : %dK\n", info.new_chunk/1024);
445 printf("\n");
446 } else if (e && e->percent >= 0)
447 printf("\n");
448 if (st && st->sb)
449 st->ss->detail_super(st, homehost);
450
451 if (array.raid_disks == 0 && sra && sra->array.major_version == -1
452 && sra->array.minor_version == -2 && sra->text_version[0] != '/') {
453 /* This looks like a container. Find any active arrays
454 * That claim to be a member.
455 */
456 DIR *dir = opendir("/sys/block");
457 struct dirent *de;
458
459 printf(" Member Arrays :");
460
461 while (dir && (de = readdir(dir)) != NULL) {
462 char path[200];
463 char vbuf[1024];
464 int nlen = strlen(sra->sys_name);
465 int dn;
466 if (de->d_name[0] == '.')
467 continue;
468 sprintf(path, "/sys/block/%s/md/metadata_version",
469 de->d_name);
470 if (load_sys(path, vbuf) < 0)
471 continue;
472 if (strncmp(vbuf, "external:", 9) != 0 ||
473 !is_subarray(sra->sys_name+9) ||
474 strncmp(vbuf+10, sra->sys_name, nlen) != 0 ||
475 vbuf[10+nlen] != '/')
476 continue;
477 dn = devname2devnum(de->d_name);
478 printf(" %s", map_dev(dev2major(dn),
479 dev2minor(dn), 1));
480 }
481 if (dir)
482 closedir(dir);
483 printf("\n\n");
484 }
485
486 if (array.raid_disks)
487 printf(" Number Major Minor RaidDevice State\n");
488 else
489 printf(" Number Major Minor RaidDevice\n");
490 }
491
492 for (d= 0; d < max_disks; d++) {
493 char *dv;
494 mdu_disk_info_t disk = disks[d];
495
496 if (d >= array.raid_disks &&
497 disk.major == 0 &&
498 disk.minor == 0)
499 continue;
500 if (!brief) {
501 if (d == array.raid_disks) printf("\n");
502 if (disk.raid_disk < 0)
503 printf(" %5d %5d %5d - ",
504 disk.number, disk.major, disk.minor);
505 else
506 printf(" %5d %5d %5d %5d ",
507 disk.number, disk.major, disk.minor, disk.raid_disk);
508 }
509 if (!brief && array.raid_disks) {
510
511 if (disk.state & (1<<MD_DISK_FAULTY)) {
512 printf(" faulty");
513 if (disk.raid_disk < array.raid_disks &&
514 disk.raid_disk >= 0)
515 failed++;
516 }
517 if (disk.state & (1<<MD_DISK_ACTIVE)) printf(" active");
518 if (disk.state & (1<<MD_DISK_SYNC)) printf(" sync");
519 if (disk.state & (1<<MD_DISK_REMOVED)) printf(" removed");
520 if (disk.state & (1<<MD_DISK_WRITEMOSTLY)) printf(" writemostly");
521 if ((disk.state &
522 ((1<<MD_DISK_ACTIVE)|(1<<MD_DISK_SYNC)|(1<<MD_DISK_REMOVED)))
523 == 0) {
524 printf(" spare");
525 if (is_26) {
526 if (disk.raid_disk < array.raid_disks && disk.raid_disk >= 0)
527 printf(" rebuilding");
528 } else if (is_rebuilding && failed) {
529 /* Taking a bit of a risk here, we remove the
530 * device from the array, and then put it back.
531 * If this fails, we are rebuilding
532 */
533 int err = ioctl(fd, HOT_REMOVE_DISK, makedev(disk.major, disk.minor));
534 if (err == 0) ioctl(fd, HOT_ADD_DISK, makedev(disk.major, disk.minor));
535 if (err && errno == EBUSY)
536 printf(" rebuilding");
537 }
538 }
539 }
540 if (disk.state == 0) spares++;
541 if (test && d < array.raid_disks
542 && !(disk.state & (1<<MD_DISK_SYNC)))
543 rv |= 1;
544 if ((dv=map_dev(disk.major, disk.minor, 0))) {
545 if (brief) {
546 if (devices) {
547 devices = realloc(devices,
548 strlen(devices)+1+strlen(dv)+1);
549 strcat(strcat(devices,","),dv);
550 } else
551 devices = strdup(dv);
552 } else
553 printf(" %s", dv);
554 }
555 if (!brief) printf("\n");
556 }
557 if (spares && brief && array.raid_disks) printf(" spares=%d", spares);
558 if (brief && st && st->sb)
559 st->ss->brief_detail_super(st);
560 st->ss->free_super(st);
561
562 if (brief > 1 && devices) printf("\n devices=%s", devices);
563 if (brief) printf("\n");
564 if (test &&
565 !enough(array.level, array.raid_disks, array.layout,
566 1, avail, avail_disks))
567 rv = 2;
568
569 free(disks);
570 out:
571 close(fd);
572 return rv;
573 }
574
575 int Detail_Platform(struct superswitch *ss, int scan, int verbose)
576 {
577 /* display platform capabilities for the given metadata format
578 * 'scan' in this context means iterate over all metadata types
579 */
580 int i;
581 int err = 1;
582
583 if (ss && ss->detail_platform)
584 err = ss->detail_platform(verbose, 0);
585 else if (ss) {
586 if (verbose)
587 fprintf(stderr, Name ": %s metadata is platform independent\n",
588 ss->name ? : "[no name]");
589 } else if (!scan) {
590 if (verbose)
591 fprintf(stderr, Name ": specify a metadata type or --scan\n");
592 }
593
594 if (!scan)
595 return err;
596
597 for (i = 0; superlist[i]; i++) {
598 struct superswitch *meta = superlist[i];
599
600 if (meta == ss)
601 continue;
602 if (verbose)
603 fprintf(stderr, Name ": checking metadata %s\n",
604 meta->name ? : "[no name]");
605 if (!meta->detail_platform) {
606 if (verbose)
607 fprintf(stderr, Name ": %s metadata is platform independent\n",
608 meta->name ? : "[no name]");
609 } else
610 err |= meta->detail_platform(verbose, 0);
611 }
612
613 return err;
614 }
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