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[thirdparty/mdadm.git] / Incremental.c
1 /*
2 * Incremental.c - support --incremental. Part of:
3 * mdadm - manage Linux "md" devices aka RAID arrays.
4 *
5 * Copyright (C) 2006-2009 Neil Brown <neilb@suse.de>
6 *
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 * Author: Neil Brown
23 * Email: <neilb@suse.de>
24 * Paper: Neil Brown
25 * Novell Inc
26 * GPO Box Q1283
27 * QVB Post Office, NSW 1230
28 * Australia
29 */
30
31 #include "mdadm.h"
32
33 static int count_active(struct supertype *st, int mdfd, char **availp,
34 struct mdinfo *info);
35 static void find_reject(int mdfd, struct supertype *st, struct mdinfo *sra,
36 int number, __u64 events, int verbose,
37 char *array_name);
38
39 int Incremental(char *devname, int verbose, int runstop,
40 struct supertype *st, char *homehost, int require_homehost,
41 int autof)
42 {
43 /* Add this device to an array, creating the array if necessary
44 * and starting the array if sensible or - if runstop>0 - if possible.
45 *
46 * This has several steps:
47 *
48 * 1/ Check if device is permitted by mdadm.conf, reject if not.
49 * 2/ Find metadata, reject if none appropriate (check
50 * version/name from args)
51 * 3/ Check if there is a match in mdadm.conf
52 * 3a/ if not, check for homehost match. If no match, assemble as
53 * a 'foreign' array.
54 * 4/ Determine device number.
55 * - If in mdadm.conf with std name, use that
56 * - UUID in /var/run/mdadm.map use that
57 * - If name is suggestive, use that. unless in use with different uuid.
58 * - Choose a free, high number.
59 * - Use a partitioned device unless strong suggestion not to.
60 * e.g. auto=md
61 * Don't choose partitioned for containers.
62 * 5/ Find out if array already exists
63 * 5a/ if it does not
64 * - choose a name, from mdadm.conf or 'name' field in array.
65 * - create the array
66 * - add the device
67 * 5b/ if it does
68 * - check one drive in array to make sure metadata is a reasonably
69 * close match. Reject if not (e.g. different type)
70 * - add the device
71 * 6/ Make sure /var/run/mdadm.map contains this array.
72 * 7/ Is there enough devices to possibly start the array?
73 * For a container, this means running Incremental_container.
74 * 7a/ if not, finish with success.
75 * 7b/ if yes,
76 * - read all metadata and arrange devices like -A does
77 * - if number of OK devices match expected, or -R and there are enough,
78 * start the array (auto-readonly).
79 */
80 struct stat stb;
81 struct mdinfo info;
82 struct mddev_ident_s *array_list, *match;
83 char chosen_name[1024];
84 int rv;
85 struct map_ent *mp, *map = NULL;
86 int dfd, mdfd;
87 char *avail;
88 int active_disks;
89 int trustworthy = FOREIGN;
90 char *name_to_use;
91 mdu_array_info_t ainf;
92
93 struct createinfo *ci = conf_get_create_info();
94
95
96 /* 1/ Check if device is permitted by mdadm.conf */
97
98 if (!conf_test_dev(devname)) {
99 if (verbose >= 0)
100 fprintf(stderr, Name
101 ": %s not permitted by mdadm.conf.\n",
102 devname);
103 return 1;
104 }
105
106 /* 2/ Find metadata, reject if none appropriate (check
107 * version/name from args) */
108
109 dfd = dev_open(devname, O_RDONLY|O_EXCL);
110 if (dfd < 0) {
111 if (verbose >= 0)
112 fprintf(stderr, Name ": cannot open %s: %s.\n",
113 devname, strerror(errno));
114 return 1;
115 }
116 if (fstat(dfd, &stb) < 0) {
117 if (verbose >= 0)
118 fprintf(stderr, Name ": fstat failed for %s: %s.\n",
119 devname, strerror(errno));
120 close(dfd);
121 return 1;
122 }
123 if ((stb.st_mode & S_IFMT) != S_IFBLK) {
124 if (verbose >= 0)
125 fprintf(stderr, Name ": %s is not a block device.\n",
126 devname);
127 close(dfd);
128 return 1;
129 }
130
131 if (st == NULL && (st = guess_super(dfd)) == NULL) {
132 if (verbose >= 0)
133 fprintf(stderr, Name
134 ": no recognisable superblock on %s.\n",
135 devname);
136 close(dfd);
137 return 1;
138 }
139 if (st->ss->load_super(st, dfd, NULL)) {
140 if (verbose >= 0)
141 fprintf(stderr, Name ": no RAID superblock on %s.\n",
142 devname);
143 close(dfd);
144 return 1;
145 }
146 close (dfd);
147
148 memset(&info, 0, sizeof(info));
149 st->ss->getinfo_super(st, &info);
150 /* 3/ Check if there is a match in mdadm.conf */
151
152 array_list = conf_get_ident(NULL);
153 match = NULL;
154 for (; array_list; array_list = array_list->next) {
155 if (array_list->uuid_set &&
156 same_uuid(array_list->uuid, info.uuid, st->ss->swapuuid)
157 == 0) {
158 if (verbose >= 2 && array_list->devname)
159 fprintf(stderr, Name
160 ": UUID differs from %s.\n",
161 array_list->devname);
162 continue;
163 }
164 if (array_list->name[0] &&
165 strcasecmp(array_list->name, info.name) != 0) {
166 if (verbose >= 2 && array_list->devname)
167 fprintf(stderr, Name
168 ": Name differs from %s.\n",
169 array_list->devname);
170 continue;
171 }
172 if (array_list->devices &&
173 !match_oneof(array_list->devices, devname)) {
174 if (verbose >= 2 && array_list->devname)
175 fprintf(stderr, Name
176 ": Not a listed device for %s.\n",
177 array_list->devname);
178 continue;
179 }
180 if (array_list->super_minor != UnSet &&
181 array_list->super_minor != info.array.md_minor) {
182 if (verbose >= 2 && array_list->devname)
183 fprintf(stderr, Name
184 ": Different super-minor to %s.\n",
185 array_list->devname);
186 continue;
187 }
188 if (!array_list->uuid_set &&
189 !array_list->name[0] &&
190 !array_list->devices &&
191 array_list->super_minor == UnSet) {
192 if (verbose >= 2 && array_list->devname)
193 fprintf(stderr, Name
194 ": %s doesn't have any identifying information.\n",
195 array_list->devname);
196 continue;
197 }
198 /* FIXME, should I check raid_disks and level too?? */
199
200 if (match) {
201 if (verbose >= 0) {
202 if (match->devname && array_list->devname)
203 fprintf(stderr, Name
204 ": we match both %s and %s - cannot decide which to use.\n",
205 match->devname, array_list->devname);
206 else
207 fprintf(stderr, Name
208 ": multiple lines in mdadm.conf match\n");
209 }
210 return 2;
211 }
212 match = array_list;
213 }
214
215 if (match && match->devname
216 && strcasecmp(match->devname, "<ignore>") == 0) {
217 if (verbose >= 0)
218 fprintf(stderr, Name ": array containing %s is explicitly"
219 " ignored by mdadm.conf\n",
220 devname);
221 return 1;
222 }
223
224 /* 3a/ if not, check for homehost match. If no match, continue
225 * but don't trust the 'name' in the array. Thus a 'random' minor
226 * number will be assigned, and the device name will be based
227 * on that. */
228 if (match)
229 trustworthy = LOCAL;
230 else if (st->ss->match_home(st, homehost) == 1)
231 trustworthy = LOCAL;
232 else if (st->ss->match_home(st, "any") == 1)
233 trustworthy = LOCAL_ANY;
234 else
235 trustworthy = FOREIGN;
236
237
238 if (!match && !conf_test_metadata(st->ss->name,
239 (trustworthy == LOCAL))) {
240 if (verbose >= 1)
241 fprintf(stderr, Name
242 ": %s has metadata type %s for which "
243 "auto-assembly is disabled\n",
244 devname, st->ss->name);
245 return 1;
246 }
247 if (trustworthy == LOCAL_ANY)
248 trustworthy = LOCAL;
249
250 /* There are three possible sources for 'autof': command line,
251 * ARRAY line in mdadm.conf, or CREATE line in mdadm.conf.
252 * ARRAY takes precedence, then command line, then
253 * CREATE.
254 */
255 if (match && match->autof)
256 autof = match->autof;
257 if (autof == 0)
258 autof = ci->autof;
259
260 if (st->ss->container_content && st->loaded_container) {
261 if ((runstop > 0 && info.container_enough >= 0) ||
262 info.container_enough > 0)
263 /* pass */;
264 else {
265 if (verbose)
266 fprintf(stderr, Name ": not enough devices to start the container\n");
267 return 0;
268 }
269
270 /* This is a pre-built container array, so we do something
271 * rather different.
272 */
273 return Incremental_container(st, devname, verbose, runstop,
274 autof, trustworthy);
275 }
276
277 name_to_use = info.name;
278 if (name_to_use[0] == 0 &&
279 info.array.level == LEVEL_CONTAINER &&
280 trustworthy == LOCAL) {
281 name_to_use = info.text_version;
282 trustworthy = METADATA;
283 }
284 if (name_to_use[0] && trustworthy != LOCAL &&
285 ! require_homehost &&
286 conf_name_is_free(name_to_use))
287 trustworthy = LOCAL;
288
289 /* strip "hostname:" prefix from name if we have decided
290 * to treat it as LOCAL
291 */
292 if (trustworthy == LOCAL && strchr(name_to_use, ':') != NULL)
293 name_to_use = strchr(name_to_use, ':')+1;
294
295 /* 4/ Check if array exists.
296 */
297 if (map_lock(&map))
298 fprintf(stderr, Name ": failed to get exclusive lock on "
299 "mapfile\n");
300 mp = map_by_uuid(&map, info.uuid);
301 if (mp)
302 mdfd = open_dev(mp->devnum);
303 else
304 mdfd = -1;
305
306 if (mdfd < 0) {
307 struct mdinfo *sra;
308 struct mdinfo dinfo;
309
310 /* Couldn't find an existing array, maybe make a new one */
311 mdfd = create_mddev(match ? match->devname : NULL,
312 name_to_use, autof, trustworthy, chosen_name);
313
314 if (mdfd < 0)
315 return 1;
316
317 sysfs_init(&info, mdfd, 0);
318
319 if (set_array_info(mdfd, st, &info) != 0) {
320 fprintf(stderr, Name ": failed to set array info for %s: %s\n",
321 chosen_name, strerror(errno));
322 close(mdfd);
323 return 2;
324 }
325
326 dinfo = info;
327 dinfo.disk.major = major(stb.st_rdev);
328 dinfo.disk.minor = minor(stb.st_rdev);
329 if (add_disk(mdfd, st, &info, &dinfo) != 0) {
330 fprintf(stderr, Name ": failed to add %s to %s: %s.\n",
331 devname, chosen_name, strerror(errno));
332 ioctl(mdfd, STOP_ARRAY, 0);
333 close(mdfd);
334 return 2;
335 }
336 sra = sysfs_read(mdfd, fd2devnum(mdfd), GET_DEVS);
337 if (!sra || !sra->devs || sra->devs->disk.raid_disk >= 0) {
338 /* It really should be 'none' - must be old buggy
339 * kernel, and mdadm -I may not be able to complete.
340 * So reject it.
341 */
342 ioctl(mdfd, STOP_ARRAY, NULL);
343 fprintf(stderr, Name
344 ": You have an old buggy kernel which cannot support\n"
345 " --incremental reliably. Aborting.\n");
346 close(mdfd);
347 sysfs_free(sra);
348 return 2;
349 }
350 info.array.working_disks = 1;
351 sysfs_free(sra);
352 /* 6/ Make sure /var/run/mdadm.map contains this array. */
353 map_update(&map, fd2devnum(mdfd),
354 info.text_version,
355 info.uuid, chosen_name);
356 } else {
357 /* 5b/ if it does */
358 /* - check one drive in array to make sure metadata is a reasonably */
359 /* close match. Reject if not (e.g. different type) */
360 /* - add the device */
361 char dn[20];
362 int dfd2;
363 int err;
364 struct mdinfo *sra;
365 struct supertype *st2;
366 struct mdinfo info2, *d;
367
368 if (mp->path)
369 strcpy(chosen_name, mp->path);
370 else
371 strcpy(chosen_name, devnum2devname(mp->devnum));
372
373 /* It is generally not OK to add non-spare drives to a
374 * running array as they are probably missing because
375 * they failed. However if runstop is 1, then the
376 * array was possibly started early and our best be is
377 * to add this anyway. It would probably be good to
378 * allow explicit policy statement about this..
379 * This doesn't apply to containers as the 'non-spare'
380 * flag has a different meaning. The test has to happen
381 * at the device level there
382 */
383 if (!st->ss->external
384 && (info.disk.state & (1<<MD_DISK_SYNC)) != 0
385 && runstop < 1) {
386 if (ioctl(mdfd, GET_ARRAY_INFO, &ainf) == 0) {
387 fprintf(stderr, Name
388 ": not adding %s to active array (without --run) %s\n",
389 devname, chosen_name);
390 close(mdfd);
391 return 2;
392 }
393 }
394 sra = sysfs_read(mdfd, fd2devnum(mdfd), (GET_DEVS | GET_STATE));
395 if (!sra)
396 return 2;
397
398 if (sra->devs) {
399 sprintf(dn, "%d:%d", sra->devs->disk.major,
400 sra->devs->disk.minor);
401 dfd2 = dev_open(dn, O_RDONLY);
402 st2 = dup_super(st);
403 if (st2->ss->load_super(st2, dfd2, NULL) ||
404 st->ss->compare_super(st, st2) != 0) {
405 fprintf(stderr, Name
406 ": metadata mismatch between %s and "
407 "chosen array %s\n",
408 devname, chosen_name);
409 close(mdfd);
410 close(dfd2);
411 return 2;
412 }
413 close(dfd2);
414 memset(&info2, 0, sizeof(info2));
415 st2->ss->getinfo_super(st2, &info2);
416 st2->ss->free_super(st2);
417 if (info.array.level != info2.array.level ||
418 memcmp(info.uuid, info2.uuid, 16) != 0 ||
419 info.array.raid_disks != info2.array.raid_disks) {
420 fprintf(stderr, Name
421 ": unexpected difference between %s and %s.\n",
422 chosen_name, devname);
423 close(mdfd);
424 return 2;
425 }
426 }
427 info2.disk.major = major(stb.st_rdev);
428 info2.disk.minor = minor(stb.st_rdev);
429 /* add disk needs to know about containers */
430 if (st->ss->external)
431 sra->array.level = LEVEL_CONTAINER;
432 err = add_disk(mdfd, st, sra, &info2);
433 if (err < 0 && errno == EBUSY) {
434 /* could be another device present with the same
435 * disk.number. Find and reject any such
436 */
437 find_reject(mdfd, st, sra, info.disk.number,
438 info.events, verbose, chosen_name);
439 err = add_disk(mdfd, st, sra, &info2);
440 }
441 if (err < 0) {
442 fprintf(stderr, Name ": failed to add %s to %s: %s.\n",
443 devname, chosen_name, strerror(errno));
444 close(mdfd);
445 return 2;
446 }
447 info.array.working_disks = 0;
448 for (d = sra->devs; d; d=d->next)
449 info.array.working_disks ++;
450
451 }
452
453 /* 7/ Is there enough devices to possibly start the array? */
454 /* 7a/ if not, finish with success. */
455 if (info.array.level == LEVEL_CONTAINER) {
456 /* Try to assemble within the container */
457 map_unlock(&map);
458 sysfs_uevent(&info, "change");
459 if (verbose >= 0)
460 fprintf(stderr, Name
461 ": container %s now has %d devices\n",
462 chosen_name, info.array.working_disks);
463 wait_for(chosen_name, mdfd);
464 close(mdfd);
465 rv = Incremental(chosen_name, verbose, runstop,
466 NULL, homehost, require_homehost, autof);
467 if (rv == 1)
468 /* Don't fail the whole -I if a subarray didn't
469 * have enough devices to start yet
470 */
471 rv = 0;
472 return rv;
473 }
474 avail = NULL;
475 active_disks = count_active(st, mdfd, &avail, &info);
476 if (enough(info.array.level, info.array.raid_disks,
477 info.array.layout, info.array.state & 1,
478 avail, active_disks) == 0) {
479 free(avail);
480 if (verbose >= 0)
481 fprintf(stderr, Name
482 ": %s attached to %s, not enough to start (%d).\n",
483 devname, chosen_name, active_disks);
484 map_unlock(&map);
485 close(mdfd);
486 return 0;
487 }
488 free(avail);
489
490 /* 7b/ if yes, */
491 /* - if number of OK devices match expected, or -R and there */
492 /* are enough, */
493 /* + add any bitmap file */
494 /* + start the array (auto-readonly). */
495
496 if (ioctl(mdfd, GET_ARRAY_INFO, &ainf) == 0) {
497 if (verbose >= 0)
498 fprintf(stderr, Name
499 ": %s attached to %s which is already active.\n",
500 devname, chosen_name);
501 close(mdfd);
502 map_unlock(&map);
503 return 0;
504 }
505
506 map_unlock(&map);
507 if (runstop > 0 || active_disks >= info.array.working_disks) {
508 struct mdinfo *sra;
509 /* Let's try to start it */
510 if (match && match->bitmap_file) {
511 int bmfd = open(match->bitmap_file, O_RDWR);
512 if (bmfd < 0) {
513 fprintf(stderr, Name
514 ": Could not open bitmap file %s.\n",
515 match->bitmap_file);
516 close(mdfd);
517 return 1;
518 }
519 if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) {
520 close(bmfd);
521 fprintf(stderr, Name
522 ": Failed to set bitmapfile for %s.\n",
523 chosen_name);
524 close(mdfd);
525 return 1;
526 }
527 close(bmfd);
528 }
529 sra = sysfs_read(mdfd, fd2devnum(mdfd), 0);
530 if ((sra == NULL || active_disks >= info.array.working_disks)
531 && trustworthy != FOREIGN)
532 rv = ioctl(mdfd, RUN_ARRAY, NULL);
533 else
534 rv = sysfs_set_str(sra, NULL,
535 "array_state", "read-auto");
536 if (rv == 0) {
537 if (verbose >= 0)
538 fprintf(stderr, Name
539 ": %s attached to %s, which has been started.\n",
540 devname, chosen_name);
541 rv = 0;
542 wait_for(chosen_name, mdfd);
543 } else {
544 fprintf(stderr, Name
545 ": %s attached to %s, but failed to start: %s.\n",
546 devname, chosen_name, strerror(errno));
547 rv = 1;
548 }
549 } else {
550 if (verbose >= 0)
551 fprintf(stderr, Name
552 ": %s attached to %s, not enough to start safely.\n",
553 devname, chosen_name);
554 rv = 0;
555 }
556 close(mdfd);
557 return rv;
558 }
559
560 static void find_reject(int mdfd, struct supertype *st, struct mdinfo *sra,
561 int number, __u64 events, int verbose,
562 char *array_name)
563 {
564 /* Find a device attached to this array with a disk.number of number
565 * and events less than the passed events, and remove the device.
566 */
567 struct mdinfo *d;
568 mdu_array_info_t ra;
569
570 if (ioctl(mdfd, GET_ARRAY_INFO, &ra) == 0)
571 return; /* not safe to remove from active arrays
572 * without thinking more */
573
574 for (d = sra->devs; d ; d = d->next) {
575 char dn[10];
576 int dfd;
577 struct mdinfo info;
578 sprintf(dn, "%d:%d", d->disk.major, d->disk.minor);
579 dfd = dev_open(dn, O_RDONLY);
580 if (dfd < 0)
581 continue;
582 if (st->ss->load_super(st, dfd, NULL)) {
583 close(dfd);
584 continue;
585 }
586 st->ss->getinfo_super(st, &info);
587 st->ss->free_super(st);
588 close(dfd);
589
590 if (info.disk.number != number ||
591 info.events >= events)
592 continue;
593
594 if (d->disk.raid_disk > -1)
595 sysfs_set_str(sra, d, "slot", "none");
596 if (sysfs_set_str(sra, d, "state", "remove") == 0)
597 if (verbose >= 0)
598 fprintf(stderr, Name
599 ": removing old device %s from %s\n",
600 d->sys_name+4, array_name);
601 }
602 }
603
604 static int count_active(struct supertype *st, int mdfd, char **availp,
605 struct mdinfo *bestinfo)
606 {
607 /* count how many devices in sra think they are active */
608 struct mdinfo *d;
609 int cnt = 0, cnt1 = 0;
610 __u64 max_events = 0;
611 struct mdinfo *sra = sysfs_read(mdfd, -1, GET_DEVS | GET_STATE);
612 char *avail = NULL;
613
614 if (!sra)
615 return 0;
616
617 for (d = sra->devs ; d ; d = d->next) {
618 char dn[30];
619 int dfd;
620 int ok;
621 struct mdinfo info;
622
623 sprintf(dn, "%d:%d", d->disk.major, d->disk.minor);
624 dfd = dev_open(dn, O_RDONLY);
625 if (dfd < 0)
626 continue;
627 ok = st->ss->load_super(st, dfd, NULL);
628 close(dfd);
629 if (ok != 0)
630 continue;
631 st->ss->getinfo_super(st, &info);
632 if (!avail) {
633 avail = malloc(info.array.raid_disks);
634 if (!avail) {
635 fprintf(stderr, Name ": out of memory.\n");
636 exit(1);
637 }
638 memset(avail, 0, info.array.raid_disks);
639 *availp = avail;
640 }
641
642 if (info.disk.state & (1<<MD_DISK_SYNC))
643 {
644 if (cnt == 0) {
645 cnt++;
646 max_events = info.events;
647 avail[info.disk.raid_disk] = 2;
648 st->ss->getinfo_super(st, bestinfo);
649 } else if (info.events == max_events) {
650 cnt++;
651 avail[info.disk.raid_disk] = 2;
652 } else if (info.events == max_events-1) {
653 cnt1++;
654 avail[info.disk.raid_disk] = 1;
655 } else if (info.events < max_events - 1)
656 ;
657 else if (info.events == max_events+1) {
658 int i;
659 cnt1 = cnt;
660 cnt = 1;
661 max_events = info.events;
662 for (i=0; i<info.array.raid_disks; i++)
663 if (avail[i])
664 avail[i]--;
665 avail[info.disk.raid_disk] = 2;
666 st->ss->getinfo_super(st, bestinfo);
667 } else { /* info.events much bigger */
668 cnt = 1; cnt1 = 0;
669 memset(avail, 0, info.disk.raid_disk);
670 max_events = info.events;
671 st->ss->getinfo_super(st, bestinfo);
672 }
673 }
674 st->ss->free_super(st);
675 }
676 return cnt + cnt1;
677 }
678
679 int IncrementalScan(int verbose)
680 {
681 /* look at every device listed in the 'map' file.
682 * If one is found that is not running then:
683 * look in mdadm.conf for bitmap file.
684 * if one exists, but array has none, add it.
685 * try to start array in auto-readonly mode
686 */
687 struct map_ent *mapl = NULL;
688 struct map_ent *me;
689 mddev_ident_t devs, mddev;
690 int rv = 0;
691
692 map_read(&mapl);
693 devs = conf_get_ident(NULL);
694
695 for (me = mapl ; me ; me = me->next) {
696 mdu_array_info_t array;
697 mdu_bitmap_file_t bmf;
698 struct mdinfo *sra;
699 int mdfd = open_dev(me->devnum);
700
701 if (mdfd < 0)
702 continue;
703 if (ioctl(mdfd, GET_ARRAY_INFO, &array) == 0 ||
704 errno != ENODEV) {
705 close(mdfd);
706 continue;
707 }
708 /* Ok, we can try this one. Maybe it needs a bitmap */
709 for (mddev = devs ; mddev ; mddev = mddev->next)
710 if (mddev->devname && me->path
711 && devname_matches(mddev->devname, me->path))
712 break;
713 if (mddev && mddev->bitmap_file) {
714 /*
715 * Note: early kernels will wrongly fail this, so it
716 * is a hint only
717 */
718 int added = -1;
719 if (ioctl(mdfd, GET_ARRAY_INFO, &bmf) < 0) {
720 int bmfd = open(mddev->bitmap_file, O_RDWR);
721 if (bmfd >= 0) {
722 added = ioctl(mdfd, SET_BITMAP_FILE,
723 bmfd);
724 close(bmfd);
725 }
726 }
727 if (verbose >= 0) {
728 if (added == 0)
729 fprintf(stderr, Name
730 ": Added bitmap %s to %s\n",
731 mddev->bitmap_file, me->path);
732 else if (errno != EEXIST)
733 fprintf(stderr, Name
734 ": Failed to add bitmap to %s: %s\n",
735 me->path, strerror(errno));
736 }
737 }
738 sra = sysfs_read(mdfd, 0, 0);
739 if (sra) {
740 if (sysfs_set_str(sra, NULL,
741 "array_state", "read-auto") == 0) {
742 if (verbose >= 0)
743 fprintf(stderr, Name
744 ": started array %s\n",
745 me->path ?: devnum2devname(me->devnum));
746 } else {
747 fprintf(stderr, Name
748 ": failed to start array %s: %s\n",
749 me->path ?: devnum2devname(me->devnum),
750 strerror(errno));
751 rv = 1;
752 }
753 }
754 }
755 return rv;
756 }
757
758 static char *container2devname(char *devname)
759 {
760 char *mdname = NULL;
761
762 if (devname[0] == '/') {
763 int fd = open(devname, O_RDONLY);
764 if (fd >= 0) {
765 mdname = devnum2devname(fd2devnum(fd));
766 close(fd);
767 }
768 } else {
769 int uuid[4];
770 struct map_ent *mp, *map = NULL;
771
772 if (!parse_uuid(devname, uuid))
773 return mdname;
774 mp = map_by_uuid(&map, uuid);
775 if (mp)
776 mdname = devnum2devname(mp->devnum);
777 map_free(map);
778 }
779
780 return mdname;
781 }
782
783 int Incremental_container(struct supertype *st, char *devname, int verbose,
784 int runstop, int autof, int trustworthy)
785 {
786 /* Collect the contents of this container and for each
787 * array, choose a device name and assemble the array.
788 */
789
790 struct mdinfo *list = st->ss->container_content(st);
791 struct mdinfo *ra;
792 struct map_ent *map = NULL;
793
794 if (map_lock(&map))
795 fprintf(stderr, Name ": failed to get exclusive lock on "
796 "mapfile\n");
797
798 for (ra = list ; ra ; ra = ra->next) {
799 int mdfd;
800 char chosen_name[1024];
801 struct map_ent *mp;
802 struct mddev_ident_s *match = NULL;
803
804 mp = map_by_uuid(&map, ra->uuid);
805
806 if (mp) {
807 mdfd = open_dev(mp->devnum);
808 if (mp->path)
809 strcpy(chosen_name, mp->path);
810 else
811 strcpy(chosen_name, devnum2devname(mp->devnum));
812 } else {
813
814 /* Check in mdadm.conf for container == devname and
815 * member == ra->text_version after second slash.
816 */
817 char *sub = strchr(ra->text_version+1, '/');
818 struct mddev_ident_s *array_list;
819 if (sub) {
820 sub++;
821 array_list = conf_get_ident(NULL);
822 } else
823 array_list = NULL;
824 for(; array_list ; array_list = array_list->next) {
825 char *dn;
826 if (array_list->member == NULL ||
827 array_list->container == NULL)
828 continue;
829 if (strcmp(array_list->member, sub) != 0)
830 continue;
831 if (array_list->uuid_set &&
832 !same_uuid(ra->uuid, array_list->uuid, st->ss->swapuuid))
833 continue;
834 dn = container2devname(array_list->container);
835 if (dn == NULL)
836 continue;
837 if (strncmp(dn, ra->text_version+1,
838 strlen(dn)) != 0 ||
839 ra->text_version[strlen(dn)+1] != '/') {
840 free(dn);
841 continue;
842 }
843 free(dn);
844 /* we have a match */
845 match = array_list;
846 if (verbose>0)
847 fprintf(stderr, Name ": match found for member %s\n",
848 array_list->member);
849 break;
850 }
851
852 if (match && match->devname &&
853 strcasecmp(match->devname, "<ignore>") == 0) {
854 if (verbose > 0)
855 fprintf(stderr, Name ": array %s/%s is "
856 "explicitly ignored by mdadm.conf\n",
857 match->container, match->member);
858 return 2;
859 }
860 if (match)
861 trustworthy = LOCAL;
862
863 mdfd = create_mddev(match ? match->devname : NULL,
864 ra->name,
865 autof,
866 trustworthy,
867 chosen_name);
868 }
869
870 if (mdfd < 0) {
871 fprintf(stderr, Name ": failed to open %s: %s.\n",
872 chosen_name, strerror(errno));
873 return 2;
874 }
875
876 assemble_container_content(st, mdfd, ra, runstop,
877 chosen_name, verbose);
878 }
879 map_unlock(&map);
880 return 0;
881 }
882
883 /*
884 * IncrementalRemove - Attempt to see if the passed in device belongs to any
885 * raid arrays, and if so first fail (if needed) and then remove the device.
886 *
887 * @devname - The device we want to remove
888 *
889 * Note: the device name must be a kernel name like "sda", so
890 * that we can find it in /proc/mdstat
891 */
892 int IncrementalRemove(char *devname, int verbose)
893 {
894 int mdfd;
895 int rv;
896 struct mdstat_ent *ent;
897 struct mddev_dev_s devlist;
898
899 if (strchr(devname, '/')) {
900 fprintf(stderr, Name ": incremental removal requires a "
901 "kernel device name, not a file: %s\n", devname);
902 return 1;
903 }
904 ent = mdstat_by_component(devname);
905 if (!ent) {
906 fprintf(stderr, Name ": %s does not appear to be a component "
907 "of any array\n", devname);
908 return 1;
909 }
910 mdfd = open_dev(ent->devnum);
911 if (mdfd < 0) {
912 fprintf(stderr, Name ": Cannot open array %s!!\n", ent->dev);
913 return 1;
914 }
915 memset(&devlist, 0, sizeof(devlist));
916 devlist.devname = devname;
917 devlist.disposition = 'f';
918 Manage_subdevs(ent->dev, mdfd, &devlist, verbose, 0);
919 devlist.disposition = 'r';
920 rv = Manage_subdevs(ent->dev, mdfd, &devlist, verbose, 0);
921 close(mdfd);
922 return rv;
923 }
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