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imsm: Remove --dump/--restore implementation
[thirdparty/mdadm.git] / Assemble.c
1 /*
2 * mdadm - manage Linux "md" devices aka RAID arrays.
3 *
4 * Copyright (C) 2001-2016 Neil Brown <neilb@suse.com>
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 <ctype.h>
27
28 static int name_matches(char *found, char *required, char *homehost, int require_homehost)
29 {
30 /* See if the name found matches the required name, possibly
31 * prefixed with 'homehost'
32 */
33 char *sep;
34 unsigned int l;
35
36 if (strcmp(found, required)==0)
37 return 1;
38 sep = strchr(found, ':');
39 if (!sep)
40 return 0;
41 l = sep - found;
42 if (strncmp(found, "any:", 4) == 0 ||
43 (homehost && strcmp(homehost, "any") == 0) ||
44 !require_homehost ||
45 (homehost && strlen(homehost) == l &&
46 strncmp(found, homehost, l) == 0)) {
47 /* matching homehost */
48 if (strcmp(sep+1, required) == 0)
49 return 1;
50 }
51 return 0;
52 }
53
54 static int is_member_busy(char *metadata_version)
55 {
56 /* check if the given member array is active */
57 struct mdstat_ent *mdstat = mdstat_read(0, 0);
58 struct mdstat_ent *ent;
59 int busy = 0;
60
61 for (ent = mdstat; ent; ent = ent->next) {
62 if (ent->metadata_version == NULL)
63 continue;
64 if (strncmp(ent->metadata_version, "external:", 9) != 0)
65 continue;
66 if (!is_subarray(&ent->metadata_version[9]))
67 continue;
68 /* Skip first char - it can be '/' or '-' */
69 if (strcmp(&ent->metadata_version[10], metadata_version+1) == 0) {
70 busy = 1;
71 break;
72 }
73 }
74 free_mdstat(mdstat);
75
76 return busy;
77 }
78
79 static int ident_matches(struct mddev_ident *ident,
80 struct mdinfo *content,
81 struct supertype *tst,
82 char *homehost, int require_homehost,
83 char *update, char *devname)
84 {
85
86 if (ident->uuid_set && (!update || strcmp(update, "uuid")!= 0) &&
87 same_uuid(content->uuid, ident->uuid, tst->ss->swapuuid)==0 &&
88 memcmp(content->uuid, uuid_zero, sizeof(int[4])) != 0) {
89 if (devname)
90 pr_err("%s has wrong uuid.\n", devname);
91 return 0;
92 }
93 if (ident->name[0] && (!update || strcmp(update, "name")!= 0) &&
94 name_matches(content->name, ident->name, homehost, require_homehost)==0) {
95 if (devname)
96 pr_err("%s has wrong name.\n", devname);
97 return 0;
98 }
99 if (ident->super_minor != UnSet &&
100 ident->super_minor != content->array.md_minor) {
101 if (devname)
102 pr_err("%s has wrong super-minor.\n",
103 devname);
104 return 0;
105 }
106 if (ident->level != UnSet &&
107 ident->level != content->array.level) {
108 if (devname)
109 pr_err("%s has wrong raid level.\n",
110 devname);
111 return 0;
112 }
113 if (ident->raid_disks != UnSet &&
114 content->array.raid_disks != 0 && /* metadata doesn't know how many to expect */
115 ident->raid_disks!= content->array.raid_disks) {
116 if (devname)
117 pr_err("%s requires wrong number of drives.\n",
118 devname);
119 return 0;
120 }
121 if (ident->member && ident->member[0]) {
122 /* content->text_version must match */
123 char *s = strchr(content->text_version+1, '/');
124 if (s == NULL) {
125 if (devname)
126 pr_err("%s is not a container and one is required.\n",
127 devname);
128 return 0;
129 } else if (strcmp(ident->member, s+1) != 0) {
130 if (devname)
131 pr_err("skipping wrong member %s is %s\n",
132 content->text_version, devname);
133 return 0;
134 }
135 }
136 return 1;
137 }
138
139 static int select_devices(struct mddev_dev *devlist,
140 struct mddev_ident *ident,
141 struct supertype **stp,
142 struct mdinfo **contentp,
143 struct context *c,
144 int inargv, int auto_assem)
145 {
146 struct mddev_dev *tmpdev;
147 int num_devs;
148 struct supertype *st = *stp;
149 struct mdinfo *content = NULL;
150 int report_mismatch = ((inargv && c->verbose >= 0) || c->verbose > 0);
151 struct domainlist *domains = NULL;
152 dev_t rdev;
153
154 tmpdev = devlist; num_devs = 0;
155 while (tmpdev) {
156 if (tmpdev->used)
157 tmpdev->used = 2;
158 else
159 num_devs++;
160 tmpdev->disposition = 0;
161 tmpdev = tmpdev->next;
162 }
163
164 /* first walk the list of devices to find a consistent set
165 * that match the criterea, if that is possible.
166 * We flag the ones we like with 'used'.
167 */
168 for (tmpdev = devlist;
169 tmpdev;
170 tmpdev = tmpdev ? tmpdev->next : NULL) {
171 char *devname = tmpdev->devname;
172 int dfd;
173 struct supertype *tst;
174 struct dev_policy *pol = NULL;
175 int found_container = 0;
176
177 if (tmpdev->used > 1)
178 continue;
179
180 if (ident->container) {
181 if (ident->container[0] == '/' &&
182 !same_dev(ident->container, devname)) {
183 if (report_mismatch)
184 pr_err("%s is not the container required (%s)\n",
185 devname, ident->container);
186 continue;
187 }
188 } else if (ident->devices &&
189 !match_oneof(ident->devices, devname)) {
190 /* Note that we ignore the "device=" identifier if a
191 * "container=" is given. Checking both is unnecessarily
192 * complicated.
193 */
194 if (report_mismatch)
195 pr_err("%s is not one of %s\n", devname, ident->devices);
196 continue;
197 }
198
199 tst = dup_super(st);
200
201 dfd = dev_open(devname, O_RDONLY);
202 if (dfd < 0) {
203 if (report_mismatch)
204 pr_err("cannot open device %s: %s\n",
205 devname, strerror(errno));
206 tmpdev->used = 2;
207 } else if (!fstat_is_blkdev(dfd, devname, &rdev)) {
208 tmpdev->used = 2;
209 } else if (must_be_container(dfd)) {
210 if (st) {
211 /* already found some components, this cannot
212 * be another one.
213 */
214 if (report_mismatch)
215 pr_err("%s is a container, but we are looking for components\n",
216 devname);
217 tmpdev->used = 2;
218 } if (!tst && (tst = super_by_fd(dfd, NULL)) == NULL) {
219 if (report_mismatch)
220 pr_err("not a recognisable container: %s\n",
221 devname);
222 tmpdev->used = 2;
223 } else if (!tst->ss->load_container ||
224 tst->ss->load_container(tst, dfd, NULL)) {
225 if (report_mismatch)
226 pr_err("no correct container type: %s\n",
227 devname);
228 tmpdev->used = 2;
229 } else if (auto_assem &&
230 !conf_test_metadata(tst->ss->name,
231 (pol = devid_policy(rdev)),
232 tst->ss->match_home(tst, c->homehost) == 1)) {
233 if (report_mismatch)
234 pr_err("%s has metadata type %s for which auto-assembly is disabled\n",
235 devname, tst->ss->name);
236 tmpdev->used = 2;
237 } else
238 found_container = 1;
239 } else {
240 if (!tst && (tst = guess_super(dfd)) == NULL) {
241 if (report_mismatch)
242 pr_err("no recogniseable superblock on %s\n",
243 devname);
244 tmpdev->used = 2;
245 } else if ((tst->ignore_hw_compat = 0),
246 tst->ss->load_super(tst, dfd,
247 report_mismatch ? devname : NULL)) {
248 if (report_mismatch)
249 pr_err("no RAID superblock on %s\n",
250 devname);
251 tmpdev->used = 2;
252 } else if (tst->ss->compare_super == NULL) {
253 if (report_mismatch)
254 pr_err("Cannot assemble %s metadata on %s\n",
255 tst->ss->name, devname);
256 tmpdev->used = 2;
257 } else if (auto_assem && st == NULL &&
258 !conf_test_metadata(tst->ss->name,
259 (pol = devid_policy(rdev)),
260 tst->ss->match_home(tst, c->homehost) == 1)) {
261 if (report_mismatch)
262 pr_err("%s has metadata type %s for which auto-assembly is disabled\n",
263 devname, tst->ss->name);
264 tmpdev->used = 2;
265 }
266 }
267 if (dfd >= 0) close(dfd);
268 if (tmpdev->used == 2) {
269 if (auto_assem || !inargv)
270 /* Ignore unrecognised devices during auto-assembly */
271 goto loop;
272 if (ident->uuid_set || ident->name[0] ||
273 ident->super_minor != UnSet)
274 /* Ignore unrecognised device if looking for
275 * specific array */
276 goto loop;
277
278 pr_err("%s has no superblock - assembly aborted\n",
279 devname);
280 if (st)
281 st->ss->free_super(st);
282 dev_policy_free(pol);
283 domain_free(domains);
284 if (tst)
285 tst->ss->free_super(tst);
286 return -1;
287 }
288
289 if (found_container) {
290 /* tmpdev is a container. We need to be either
291 * looking for a member, or auto-assembling
292 */
293 /* should be safe to try an exclusive open now, we
294 * have rejected anything that some other mdadm might
295 * be looking at
296 */
297 dfd = dev_open(devname, O_RDONLY | O_EXCL);
298 if (dfd < 0) {
299 if (report_mismatch)
300 pr_err("%s is busy - skipping\n", devname);
301 goto loop;
302 }
303 close(dfd);
304
305 if (ident->container && ident->container[0] != '/') {
306 /* we have a uuid */
307 int uuid[4];
308
309 content = *contentp;
310 tst->ss->getinfo_super(tst, content, NULL);
311
312 if (!parse_uuid(ident->container, uuid) ||
313 !same_uuid(content->uuid, uuid, tst->ss->swapuuid)) {
314 if (report_mismatch)
315 pr_err("%s has wrong UUID to be required container\n",
316 devname);
317 goto loop;
318 }
319 }
320 /* It is worth looking inside this container.
321 */
322 if (c->verbose > 0)
323 pr_err("looking in container %s\n",
324 devname);
325
326 for (content = tst->ss->container_content(tst, NULL);
327 content;
328 content = content->next) {
329
330 if (!ident_matches(ident, content, tst,
331 c->homehost, c->require_homehost,
332 c->update,
333 report_mismatch ? devname : NULL))
334 /* message already printed */;
335 else if (is_member_busy(content->text_version)) {
336 if (report_mismatch)
337 pr_err("member %s in %s is already assembled\n",
338 content->text_version,
339 devname);
340 } else if (content->array.state & (1<<MD_SB_BLOCK_VOLUME)) {
341 /* do not assemble arrays with unsupported configurations */
342 pr_err("Cannot activate member %s in %s.\n",
343 content->text_version,
344 devname);
345 } else
346 break;
347 }
348 if (!content) {
349 tmpdev->used = 2;
350 goto loop; /* empty container */
351 }
352
353 st = tst; tst = NULL;
354 if (!auto_assem && inargv && tmpdev->next != NULL) {
355 pr_err("%s is a container, but is not only device given: confused and aborting\n",
356 devname);
357 st->ss->free_super(st);
358 dev_policy_free(pol);
359 domain_free(domains);
360 return -1;
361 }
362 if (c->verbose > 0)
363 pr_err("found match on member %s in %s\n",
364 content->text_version, devname);
365
366 /* make sure we finished the loop */
367 tmpdev = NULL;
368 goto loop;
369 } else {
370 content = *contentp;
371 tst->ss->getinfo_super(tst, content, NULL);
372
373 if (!ident_matches(ident, content, tst,
374 c->homehost, c->require_homehost,
375 c->update,
376 report_mismatch ? devname : NULL))
377 goto loop;
378
379 if (auto_assem) {
380 /* Never auto-assemble things that conflict
381 * with mdadm.conf in some way
382 */
383 struct mddev_ident *match;
384 int rv = 0;
385
386 match = conf_match(tst, content, devname,
387 report_mismatch ? c->verbose : -1,
388 &rv);
389 if (!match && rv == 2)
390 goto loop;
391 if (match && match->devname &&
392 strcasecmp(match->devname, "<ignore>") == 0) {
393 if (report_mismatch)
394 pr_err("%s is a member of an explicitly ignored array\n",
395 devname);
396 goto loop;
397 }
398 if (match && !ident_matches(match, content, tst,
399 c->homehost, c->require_homehost,
400 c->update,
401 report_mismatch ? devname : NULL))
402 /* Array exists in mdadm.conf but some
403 * details don't match, so reject it
404 */
405 goto loop;
406 }
407
408 /* should be safe to try an exclusive open now, we
409 * have rejected anything that some other mdadm might
410 * be looking at
411 */
412 dfd = dev_open(devname, O_RDONLY | O_EXCL);
413 if (dfd < 0) {
414 if (report_mismatch)
415 pr_err("%s is busy - skipping\n", devname);
416 goto loop;
417 }
418 close(dfd);
419
420 if (st == NULL)
421 st = dup_super(tst);
422 if (st->minor_version == -1)
423 st->minor_version = tst->minor_version;
424
425 if (memcmp(content->uuid, uuid_zero,
426 sizeof(int[4])) == 0) {
427 /* this is a floating spare. It cannot define
428 * an array unless there are no more arrays of
429 * this type to be found. It can be included
430 * in an array of this type though.
431 */
432 tmpdev->used = 3;
433 goto loop;
434 }
435
436 if (st->ss != tst->ss ||
437 st->minor_version != tst->minor_version ||
438 st->ss->compare_super(st, tst) != 0) {
439 /* Some mismatch. If exactly one array matches this host,
440 * we can resolve on that one.
441 * Or, if we are auto assembling, we just ignore the second
442 * for now.
443 */
444 if (auto_assem)
445 goto loop;
446 if (c->homehost) {
447 int first = st->ss->match_home(st, c->homehost);
448 int last = tst->ss->match_home(tst, c->homehost);
449 if (first != last &&
450 (first == 1 || last == 1)) {
451 /* We can do something */
452 if (first) {/* just ignore this one */
453 if (report_mismatch)
454 pr_err("%s misses out due to wrong homehost\n",
455 devname);
456 goto loop;
457 } else { /* reject all those sofar */
458 struct mddev_dev *td;
459 if (report_mismatch)
460 pr_err("%s overrides previous devices due to good homehost\n",
461 devname);
462 for (td=devlist; td != tmpdev; td=td->next)
463 if (td->used == 1)
464 td->used = 0;
465 tmpdev->used = 1;
466 goto loop;
467 }
468 }
469 }
470 pr_err("superblock on %s doesn't match others - assembly aborted\n",
471 devname);
472 tst->ss->free_super(tst);
473 st->ss->free_super(st);
474 dev_policy_free(pol);
475 domain_free(domains);
476 return -1;
477 }
478 tmpdev->used = 1;
479 }
480 loop:
481 /* Collect domain information from members only */
482 if (tmpdev && tmpdev->used == 1) {
483 if (!pol)
484 pol = devid_policy(rdev);
485 domain_merge(&domains, pol, tst?tst->ss->name:NULL);
486 }
487 dev_policy_free(pol);
488 pol = NULL;
489 if (tst)
490 tst->ss->free_super(tst);
491 }
492
493 /* Check if we found some imsm spares but no members */
494 if ((auto_assem ||
495 (ident->uuid_set &&
496 memcmp(uuid_zero, ident->uuid,sizeof(uuid_zero)) == 0)) &&
497 (!st || !st->sb))
498 for (tmpdev = devlist; tmpdev; tmpdev = tmpdev->next) {
499 if (tmpdev->used != 3)
500 continue;
501 tmpdev->used = 1;
502 content = *contentp;
503
504 if (!st->sb) {
505 /* we need sb from one of the spares */
506 int dfd = dev_open(tmpdev->devname, O_RDONLY);
507 if (dfd < 0 ||
508 st->ss->load_super(st, dfd, NULL))
509 tmpdev->used = 2;
510 if (dfd > 0)
511 close(dfd);
512 }
513 }
514
515 /* Now reject spares that don't match domains of identified members */
516 for (tmpdev = devlist; tmpdev; tmpdev = tmpdev->next) {
517 if (tmpdev->used != 3)
518 continue;
519 if (!stat_is_blkdev(tmpdev->devname, &rdev)) {
520 tmpdev->used = 2;
521 } else {
522 struct dev_policy *pol = devid_policy(rdev);
523 int dt = domain_test(domains, pol, NULL);
524 if (inargv && dt != 0)
525 /* take this spare as domains match
526 * if there are any */
527 tmpdev->used = 1;
528 else if (!inargv && dt == 1)
529 /* device wasn't explicitly listed, so need
530 * explicit domain match - which we have */
531 tmpdev->used = 1;
532 else
533 /* if domains don't match mark as unused */
534 tmpdev->used = 0;
535 dev_policy_free(pol);
536 }
537 }
538 domain_free(domains);
539 *stp = st;
540 if (st && st->sb && content == *contentp)
541 st->ss->getinfo_super(st, content, NULL);
542 *contentp = content;
543
544 return num_devs;
545 }
546
547 struct devs {
548 char *devname;
549 int uptodate; /* set once we decide that this device is as
550 * recent as everything else in the array.
551 */
552 int included; /* set if the device is already in the array
553 * due to a previous '-I'
554 */
555 struct mdinfo i;
556 };
557
558 static int load_devices(struct devs *devices, char *devmap,
559 struct mddev_ident *ident, struct supertype **stp,
560 struct mddev_dev *devlist, struct context *c,
561 struct mdinfo *content,
562 int mdfd, char *mddev,
563 int *most_recentp, int *bestcntp, int **bestp,
564 int inargv)
565 {
566 struct mddev_dev *tmpdev;
567 int devcnt = 0;
568 int nextspare = 0;
569 int bitmap_done = 0;
570 int most_recent = -1;
571 int bestcnt = 0;
572 int *best = *bestp;
573 struct supertype *st = *stp;
574
575 for (tmpdev = devlist; tmpdev; tmpdev=tmpdev->next) {
576 char *devname = tmpdev->devname;
577 struct stat stb;
578 struct supertype *tst;
579 int i;
580 int dfd;
581 int disk_state;
582
583 if (tmpdev->used != 1)
584 continue;
585 /* looks like a good enough match to update the super block if needed */
586 if (c->update) {
587 /* prepare useful information in info structures */
588 struct stat stb2;
589 int err;
590 fstat(mdfd, &stb2);
591
592 if (strcmp(c->update, "uuid") == 0 && !ident->uuid_set)
593 random_uuid((__u8 *)ident->uuid);
594
595 if (strcmp(c->update, "ppl") == 0 &&
596 ident->bitmap_fd >= 0) {
597 pr_err("PPL is not compatible with bitmap\n");
598 close(mdfd);
599 free(devices);
600 free(devmap);
601 return -1;
602 }
603
604 dfd = dev_open(devname,
605 tmpdev->disposition == 'I'
606 ? O_RDWR : (O_RDWR|O_EXCL));
607
608 tst = dup_super(st);
609 if (dfd < 0 || tst->ss->load_super(tst, dfd, NULL) != 0) {
610 pr_err("cannot re-read metadata from %s - aborting\n",
611 devname);
612 if (dfd >= 0)
613 close(dfd);
614 close(mdfd);
615 free(devices);
616 free(devmap);
617 tst->ss->free_super(tst);
618 free(tst);
619 *stp = st;
620 return -1;
621 }
622 tst->ss->getinfo_super(tst, content, devmap + devcnt * content->array.raid_disks);
623
624 memcpy(content->uuid, ident->uuid, 16);
625 strcpy(content->name, ident->name);
626 content->array.md_minor = minor(stb2.st_rdev);
627
628 if (strcmp(c->update, "byteorder") == 0)
629 err = 0;
630 else if (strcmp(c->update, "home-cluster") == 0) {
631 tst->cluster_name = c->homecluster;
632 err = tst->ss->write_bitmap(tst, dfd, NameUpdate);
633 } else if (strcmp(c->update, "nodes") == 0) {
634 tst->nodes = c->nodes;
635 err = tst->ss->write_bitmap(tst, dfd, NodeNumUpdate);
636 } else if (strcmp(c->update, "revert-reshape") == 0 &&
637 c->invalid_backup)
638 err = tst->ss->update_super(tst, content,
639 "revert-reshape-nobackup",
640 devname, c->verbose,
641 ident->uuid_set,
642 c->homehost);
643 else
644 err = tst->ss->update_super(tst, content, c->update,
645 devname, c->verbose,
646 ident->uuid_set,
647 c->homehost);
648 if (err < 0) {
649 if (err == -1)
650 pr_err("--update=%s not understood for %s metadata\n",
651 c->update, tst->ss->name);
652 tst->ss->free_super(tst);
653 free(tst);
654 close(mdfd);
655 close(dfd);
656 free(devices);
657 free(devmap);
658 *stp = st;
659 return -1;
660 }
661 if (strcmp(c->update, "uuid")==0 &&
662 !ident->uuid_set) {
663 ident->uuid_set = 1;
664 memcpy(ident->uuid, content->uuid, 16);
665 }
666 if (tst->ss->store_super(tst, dfd))
667 pr_err("Could not re-write superblock on %s.\n",
668 devname);
669
670 if (strcmp(c->update, "uuid")==0 &&
671 ident->bitmap_fd >= 0 && !bitmap_done) {
672 if (bitmap_update_uuid(ident->bitmap_fd,
673 content->uuid,
674 tst->ss->swapuuid) != 0)
675 pr_err("Could not update uuid on external bitmap.\n");
676 else
677 bitmap_done = 1;
678 }
679 } else {
680 dfd = dev_open(devname,
681 tmpdev->disposition == 'I'
682 ? O_RDWR : (O_RDWR|O_EXCL));
683 tst = dup_super(st);
684
685 if (dfd < 0 || tst->ss->load_super(tst, dfd, NULL) != 0) {
686 pr_err("cannot re-read metadata from %s - aborting\n",
687 devname);
688 if (dfd >= 0)
689 close(dfd);
690 close(mdfd);
691 free(devices);
692 free(devmap);
693 tst->ss->free_super(tst);
694 free(tst);
695 *stp = st;
696 return -1;
697 }
698 tst->ss->getinfo_super(tst, content, devmap + devcnt * content->array.raid_disks);
699 }
700
701 fstat(dfd, &stb);
702 close(dfd);
703
704 if (c->verbose > 0)
705 pr_err("%s is identified as a member of %s, slot %d%s.\n",
706 devname, mddev, content->disk.raid_disk,
707 (content->disk.state & (1<<MD_DISK_REPLACEMENT)) ? " replacement":"");
708 devices[devcnt].devname = devname;
709 devices[devcnt].uptodate = 0;
710 devices[devcnt].included = (tmpdev->disposition == 'I');
711 devices[devcnt].i = *content;
712 devices[devcnt].i.disk.major = major(stb.st_rdev);
713 devices[devcnt].i.disk.minor = minor(stb.st_rdev);
714
715 disk_state = devices[devcnt].i.disk.state & ~((1<<MD_DISK_FAILFAST) |
716 (1<<MD_DISK_WRITEMOSTLY));
717 if (disk_state == ((1<<MD_DISK_ACTIVE) | (1<<MD_DISK_SYNC))) {
718 if (most_recent < 0 ||
719 devices[devcnt].i.events
720 > devices[most_recent].i.events) {
721 struct supertype *tmp = tst;
722 tst = st;
723 st = tmp;
724 most_recent = devcnt;
725 }
726 }
727 tst->ss->free_super(tst);
728 free(tst);
729
730 if (content->array.level == LEVEL_MULTIPATH)
731 /* with multipath, the raid_disk from the superblock is meaningless */
732 i = devcnt;
733 else
734 i = devices[devcnt].i.disk.raid_disk;
735 if (i+1 == 0 || i == MD_DISK_ROLE_JOURNAL) {
736 if (nextspare < content->array.raid_disks*2)
737 nextspare = content->array.raid_disks*2;
738 i = nextspare++;
739 } else {
740 /* i is raid_disk - double it so there is room for
741 * replacements */
742 i *= 2;
743 if (devices[devcnt].i.disk.state & (1<<MD_DISK_REPLACEMENT))
744 i++;
745 if (i >= content->array.raid_disks*2 &&
746 i >= nextspare)
747 nextspare = i+1;
748 }
749 if (i < 10000) {
750 if (i >= bestcnt) {
751 int newbestcnt = i+10;
752 int *newbest = xmalloc(sizeof(int)*newbestcnt);
753 int c;
754 for (c=0; c < newbestcnt; c++)
755 if (c < bestcnt)
756 newbest[c] = best[c];
757 else
758 newbest[c] = -1;
759 if (best)free(best);
760 best = newbest;
761 bestcnt = newbestcnt;
762 }
763 if (best[i] >=0 &&
764 devices[best[i]].i.events ==
765 devices[devcnt].i.events &&
766 (devices[best[i]].i.disk.minor !=
767 devices[devcnt].i.disk.minor) &&
768 st->ss == &super0 &&
769 content->array.level != LEVEL_MULTIPATH) {
770 /* two different devices with identical superblock.
771 * Could be a mis-detection caused by overlapping
772 * partitions. fail-safe.
773 */
774 pr_err("WARNING %s and %s appear to have very similar superblocks.\n"
775 " If they are really different, please --zero the superblock on one\n"
776 " If they are the same or overlap, please remove one from %s.\n",
777 devices[best[i]].devname, devname,
778 inargv ? "the list" :
779 "the\n DEVICE list in mdadm.conf"
780 );
781 close(mdfd);
782 free(devices);
783 free(devmap);
784 *stp = st;
785 return -1;
786 }
787 if (best[i] == -1 || (devices[best[i]].i.events
788 < devices[devcnt].i.events))
789 best[i] = devcnt;
790 else if (st->ss == &super_imsm)
791 best[i+1] = devcnt;
792 }
793 devcnt++;
794 }
795 if (most_recent >= 0)
796 *most_recentp = most_recent;
797 *bestcntp = bestcnt;
798 *bestp = best;
799 *stp = st;
800 return devcnt;
801 }
802
803 static int force_array(struct mdinfo *content,
804 struct devs *devices,
805 int *best, int bestcnt, char *avail,
806 int most_recent,
807 struct supertype *st,
808 struct context *c)
809 {
810 int okcnt = 0;
811 while (!enough(content->array.level, content->array.raid_disks,
812 content->array.layout, 1,
813 avail) ||
814 (content->reshape_active && content->delta_disks > 0 &&
815 !enough(content->array.level, (content->array.raid_disks
816 - content->delta_disks),
817 content->new_layout, 1, avail))) {
818 /* Choose the newest best drive which is
819 * not up-to-date, update the superblock
820 * and add it.
821 */
822 int fd;
823 struct supertype *tst;
824 unsigned long long current_events;
825 int chosen_drive = -1;
826 int i;
827
828 for (i = 0;
829 i < content->array.raid_disks * 2 && i < bestcnt;
830 i += 2) {
831 int j = best[i];
832 if (j < 0)
833 continue;
834 if (devices[j].uptodate)
835 continue;
836 if (devices[j].i.recovery_start != MaxSector) {
837 int delta;
838 if (!devices[j].i.reshape_active ||
839 devices[j].i.delta_disks <= 0)
840 continue;
841 /* When increasing number of devices, an
842 * added device also appears to be
843 * recovering. It is safe to include it
844 * as long as it won't be a source of
845 * data.
846 * For now, just allow for last data
847 * devices in RAID4 or last devices in RAID4/5/6.
848 */
849 delta = devices[j].i.delta_disks;
850 if (devices[j].i.array.level >= 4 &&
851 devices[j].i.array.level <= 6 &&
852 i/2 >= content->array.raid_disks - delta)
853 /* OK */;
854 else if (devices[j].i.array.level == 4 &&
855 i/2 >= content->array.raid_disks - delta - 1)
856 /* OK */;
857 else
858 continue;
859 } else if (devices[j].i.reshape_active !=
860 content->reshape_active ||
861 (devices[j].i.reshape_active &&
862 devices[j].i.reshape_progress !=
863 content->reshape_progress))
864 /* Here, it may be a source of data. If two
865 * devices claim different progresses, it
866 * means that reshape boundaries differ for
867 * their own devices. Kernel will only treat
868 * the first one as reshape progress and
869 * go on. It may cause disaster, so avoid it.
870 */
871 continue;
872 if (chosen_drive < 0 ||
873 devices[j].i.events
874 > devices[chosen_drive].i.events)
875 chosen_drive = j;
876 }
877 if (chosen_drive < 0)
878 break;
879 current_events = devices[chosen_drive].i.events;
880 add_another:
881 if (c->verbose >= 0)
882 pr_err("forcing event count in %s(%d) from %d up to %d\n",
883 devices[chosen_drive].devname,
884 devices[chosen_drive].i.disk.raid_disk,
885 (int)(devices[chosen_drive].i.events),
886 (int)(devices[most_recent].i.events));
887 fd = dev_open(devices[chosen_drive].devname,
888 devices[chosen_drive].included ? O_RDWR
889 : (O_RDWR|O_EXCL));
890 if (fd < 0) {
891 pr_err("Couldn't open %s for write - not updating\n",
892 devices[chosen_drive].devname);
893 devices[chosen_drive].i.events = 0;
894 continue;
895 }
896 tst = dup_super(st);
897 if (tst->ss->load_super(tst,fd, NULL)) {
898 close(fd);
899 pr_err("RAID superblock disappeared from %s - not updating.\n",
900 devices[chosen_drive].devname);
901 devices[chosen_drive].i.events = 0;
902 continue;
903 }
904 content->events = devices[most_recent].i.events;
905 tst->ss->update_super(tst, content, "force-one",
906 devices[chosen_drive].devname, c->verbose,
907 0, NULL);
908
909 if (tst->ss->store_super(tst, fd)) {
910 close(fd);
911 pr_err("Could not re-write superblock on %s\n",
912 devices[chosen_drive].devname);
913 devices[chosen_drive].i.events = 0;
914 tst->ss->free_super(tst);
915 continue;
916 }
917 close(fd);
918 devices[chosen_drive].i.events = devices[most_recent].i.events;
919 devices[chosen_drive].uptodate = 1;
920 avail[chosen_drive] = 1;
921 okcnt++;
922 tst->ss->free_super(tst);
923 /* If there are any other drives of the same vintage,
924 * add them in as well. We can't lose and we might gain
925 */
926 for (i = 0;
927 i < content->array.raid_disks * 2 && i < bestcnt ;
928 i += 2) {
929 int j = best[i];
930 if (j >= 0 &&
931 !devices[j].uptodate &&
932 devices[j].i.recovery_start == MaxSector &&
933 devices[j].i.events == current_events &&
934 ((!devices[j].i.reshape_active &&
935 !content->reshape_active) ||
936 (devices[j].i.reshape_active ==
937 content->reshape_active &&
938 devices[j].i.reshape_progress ==
939 content->reshape_progress))) {
940 chosen_drive = j;
941 goto add_another;
942 }
943 }
944 }
945 return okcnt;
946 }
947
948 static int start_array(int mdfd,
949 char *mddev,
950 struct mdinfo *content,
951 struct supertype *st,
952 struct mddev_ident *ident,
953 int *best, int bestcnt,
954 int chosen_drive,
955 struct devs *devices,
956 unsigned int okcnt,
957 unsigned int sparecnt,
958 unsigned int rebuilding_cnt,
959 unsigned int journalcnt,
960 struct context *c,
961 int clean, char *avail,
962 int start_partial_ok,
963 int err_ok,
964 int was_forced
965 )
966 {
967 int rv;
968 int i;
969 unsigned int req_cnt;
970
971 if (content->journal_device_required && (content->journal_clean == 0)) {
972 if (!c->force) {
973 pr_err("Not safe to assemble with missing or stale journal device, consider --force.\n");
974 return 1;
975 }
976 pr_err("Journal is missing or stale, starting array read only.\n");
977 c->readonly = 1;
978 }
979
980 if (content->consistency_policy == CONSISTENCY_POLICY_PPL)
981 clean = 1;
982
983 rv = set_array_info(mdfd, st, content);
984 if (rv && !err_ok) {
985 pr_err("failed to set array info for %s: %s\n",
986 mddev, strerror(errno));
987 return 1;
988 }
989 if (ident->bitmap_fd >= 0) {
990 if (ioctl(mdfd, SET_BITMAP_FILE, ident->bitmap_fd) != 0) {
991 pr_err("SET_BITMAP_FILE failed.\n");
992 return 1;
993 }
994 } else if (ident->bitmap_file) {
995 /* From config file */
996 int bmfd = open(ident->bitmap_file, O_RDWR);
997 if (bmfd < 0) {
998 pr_err("Could not open bitmap file %s\n",
999 ident->bitmap_file);
1000 return 1;
1001 }
1002 if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) {
1003 pr_err("Failed to set bitmapfile for %s\n", mddev);
1004 close(bmfd);
1005 return 1;
1006 }
1007 close(bmfd);
1008 }
1009
1010 /* First, add the raid disks, but add the chosen one last */
1011 for (i = 0; i <= bestcnt; i++) {
1012 int j;
1013 if (i < bestcnt) {
1014 j = best[i];
1015 if (j == chosen_drive)
1016 continue;
1017 } else
1018 j = chosen_drive;
1019
1020 if (j >= 0 && !devices[j].included) {
1021 int dfd;
1022
1023 dfd = dev_open(devices[j].devname, O_RDWR|O_EXCL);
1024 if (dfd >= 0) {
1025 remove_partitions(dfd);
1026 close(dfd);
1027 }
1028 rv = add_disk(mdfd, st, content, &devices[j].i);
1029
1030 if (rv) {
1031 pr_err("failed to add %s to %s: %s\n",
1032 devices[j].devname, mddev,
1033 strerror(errno));
1034 if (errno == EINVAL && content->array.level == 0 &&
1035 content->array.layout != 0) {
1036 cont_err("Possibly your kernel doesn't support RAID0 layouts.\n");
1037 cont_err("Please upgrade.\n");
1038 }
1039 if (i < content->array.raid_disks * 2 ||
1040 i == bestcnt)
1041 okcnt--;
1042 else
1043 sparecnt--;
1044 } else if (c->verbose > 0) {
1045 pr_err("added %s to %s as %d%s%s\n",
1046 devices[j].devname, mddev,
1047 devices[j].i.disk.raid_disk,
1048 devices[j].uptodate?"":
1049 " (possibly out of date)",
1050 (devices[j].i.disk.state &
1051 (1<<MD_DISK_REPLACEMENT)) ?
1052 " replacement":"");
1053 }
1054 } else if (j >= 0) {
1055 if (c->verbose > 0)
1056 pr_err("%s is already in %s as %d\n",
1057 devices[j].devname, mddev,
1058 devices[j].i.disk.raid_disk);
1059 } else if (c->verbose > 0 &&
1060 i < content->array.raid_disks * 2 && (i & 1) == 0)
1061 pr_err("no uptodate device for slot %d of %s\n",
1062 i/2, mddev);
1063 }
1064
1065 if (content->array.level == LEVEL_CONTAINER) {
1066 if (c->verbose >= 0) {
1067 pr_err("Container %s has been assembled with %d drive%s",
1068 mddev, okcnt + sparecnt + journalcnt,
1069 okcnt + sparecnt + journalcnt == 1 ? "" : "s");
1070 if (okcnt < (unsigned)content->array.raid_disks)
1071 fprintf(stderr, " (out of %d)\n",
1072 content->array.raid_disks);
1073 else {
1074 fprintf(stderr, "\n");
1075 sysfs_rules_apply(mddev, content);
1076 }
1077 }
1078
1079 if (st->ss->validate_container) {
1080 struct mdinfo *devices_list;
1081 struct mdinfo *info_devices;
1082 unsigned int count;
1083
1084 devices_list = NULL;
1085 info_devices = xmalloc(sizeof(struct mdinfo) *
1086 (okcnt + sparecnt));
1087 for (count = 0; count < okcnt + sparecnt; count++) {
1088 info_devices[count] = devices[count].i;
1089 info_devices[count].next = devices_list;
1090 devices_list = &info_devices[count];
1091 }
1092 if (st->ss->validate_container(devices_list))
1093 pr_err("Mismatch detected!\n");
1094 free(info_devices);
1095 }
1096
1097 st->ss->free_super(st);
1098 sysfs_uevent(content, "change");
1099 if (err_ok && okcnt < (unsigned)content->array.raid_disks)
1100 /* Was partial, is still partial, so signal an error
1101 * to ensure we don't retry */
1102 return 1;
1103 return 0;
1104 }
1105
1106 /* Get number of in-sync devices according to the superblock.
1107 * We must have this number to start the array without -s or -R
1108 */
1109 req_cnt = content->array.working_disks;
1110
1111 if (c->runstop == 1 ||
1112 (c->runstop <= 0 &&
1113 (enough(content->array.level, content->array.raid_disks,
1114 content->array.layout, clean, avail) &&
1115 (okcnt + rebuilding_cnt >= req_cnt || start_partial_ok)))) {
1116 /* This array is good-to-go.
1117 * If a reshape is in progress then we might need to
1118 * continue monitoring it. In that case we start
1119 * it read-only and let the grow code make it writable.
1120 */
1121 int rv;
1122
1123 if (content->reshape_active &&
1124 !(content->reshape_active & RESHAPE_NO_BACKUP) &&
1125 content->delta_disks <= 0) {
1126 if (!c->backup_file) {
1127 pr_err("%s: Need a backup file to complete reshape of this array.\n",
1128 mddev);
1129 pr_err("Please provided one with \"--backup-file=...\"\n");
1130 if (c->update &&
1131 strcmp(c->update, "revert-reshape") == 0)
1132 pr_err("(Don't specify --update=revert-reshape again, that part succeeded.)\n");
1133 return 1;
1134 }
1135 rv = sysfs_set_str(content, NULL,
1136 "array_state", "readonly");
1137 if (rv == 0)
1138 rv = Grow_continue(mdfd, st, content,
1139 c->backup_file, 0,
1140 c->freeze_reshape);
1141 } else if (c->readonly &&
1142 sysfs_attribute_available(content, NULL,
1143 "array_state")) {
1144 rv = sysfs_set_str(content, NULL,
1145 "array_state", "readonly");
1146 } else
1147 rv = ioctl(mdfd, RUN_ARRAY, NULL);
1148 reopen_mddev(mdfd); /* drop O_EXCL */
1149 if (rv == 0) {
1150 sysfs_rules_apply(mddev, content);
1151 if (c->verbose >= 0) {
1152 pr_err("%s has been started with %d drive%s",
1153 mddev, okcnt, okcnt==1?"":"s");
1154 if (okcnt < (unsigned)content->array.raid_disks)
1155 fprintf(stderr, " (out of %d)",
1156 content->array.raid_disks);
1157 if (rebuilding_cnt)
1158 fprintf(stderr, "%s %d rebuilding",
1159 sparecnt?",":" and",
1160 rebuilding_cnt);
1161 if (sparecnt)
1162 fprintf(stderr, " and %d spare%s",
1163 sparecnt,
1164 sparecnt == 1 ? "" : "s");
1165 if (content->journal_clean)
1166 fprintf(stderr, " and %d journal",
1167 journalcnt);
1168 fprintf(stderr, ".\n");
1169 }
1170 if (content->reshape_active &&
1171 content->array.level >= 4 &&
1172 content->array.level <= 6) {
1173 /* might need to increase the size
1174 * of the stripe cache - default is 256
1175 */
1176 int chunk_size = content->array.chunk_size;
1177
1178 if (content->reshape_active &&
1179 content->new_chunk > chunk_size)
1180 chunk_size = content->new_chunk;
1181 if (256 < 4 * ((chunk_size+4065)/4096)) {
1182 struct mdinfo *sra;
1183
1184 sra = sysfs_read(mdfd, NULL, 0);
1185 if (sra)
1186 sysfs_set_num(sra, NULL,
1187 "stripe_cache_size",
1188 (4 * chunk_size / 4096) + 1);
1189 sysfs_free(sra);
1190 }
1191 }
1192 if (okcnt < (unsigned)content->array.raid_disks) {
1193 /* If any devices did not get added
1194 * because the kernel rejected them based
1195 * on event count, try adding them
1196 * again providing the action policy is
1197 * 're-add' or greater. The bitmap
1198 * might allow them to be included, or
1199 * they will become spares.
1200 */
1201 for (i = 0; i < bestcnt; i++) {
1202 int j = best[i];
1203 if (j >= 0 && !devices[j].uptodate) {
1204 if (!disk_action_allows(&devices[j].i, st->ss->name, act_re_add))
1205 continue;
1206 rv = add_disk(mdfd, st, content,
1207 &devices[j].i);
1208 if (rv == 0 && c->verbose >= 0)
1209 pr_err("%s has been re-added.\n",
1210 devices[j].devname);
1211 }
1212 }
1213 }
1214 if (content->array.level == 6 &&
1215 okcnt + 1 == (unsigned)content->array.raid_disks &&
1216 was_forced) {
1217 struct mdinfo *sra;
1218
1219 sra = sysfs_read(mdfd, NULL, 0);
1220 if (sra)
1221 sysfs_set_str(sra, NULL,
1222 "sync_action", "repair");
1223 sysfs_free(sra);
1224 }
1225 return 0;
1226 }
1227 pr_err("failed to RUN_ARRAY %s: %s\n", mddev, strerror(errno));
1228 if (errno == 524 /* ENOTSUP */ &&
1229 content->array.level == 0 && content->array.layout == 0)
1230 cont_err("Please use --update=layout-original or --update=layout-alternate\n");
1231
1232 if (!enough(content->array.level, content->array.raid_disks,
1233 content->array.layout, 1, avail))
1234 pr_err("Not enough devices to start the array.\n");
1235 else if (!enough(content->array.level,
1236 content->array.raid_disks,
1237 content->array.layout, clean, avail))
1238 pr_err("Not enough devices to start the array while not clean - consider --force.\n");
1239
1240 return 1;
1241 }
1242 if (c->runstop == -1) {
1243 pr_err("%s assembled from %d drive%s",
1244 mddev, okcnt, okcnt == 1 ? "" : "s");
1245 if (okcnt != (unsigned)content->array.raid_disks)
1246 fprintf(stderr, " (out of %d)",
1247 content->array.raid_disks);
1248 fprintf(stderr, ", but not started.\n");
1249 return 2;
1250 }
1251 if (c->verbose >= -1) {
1252 pr_err("%s assembled from %d drive%s",
1253 mddev, okcnt, okcnt == 1 ? "" : "s");
1254 if (rebuilding_cnt)
1255 fprintf(stderr, "%s %d rebuilding",
1256 sparecnt ? "," : " and", rebuilding_cnt);
1257 if (sparecnt)
1258 fprintf(stderr, " and %d spare%s", sparecnt,
1259 sparecnt == 1 ? "" : "s");
1260 if (!enough(content->array.level, content->array.raid_disks,
1261 content->array.layout, 1, avail))
1262 fprintf(stderr, " - not enough to start the array.\n");
1263 else if (!enough(content->array.level,
1264 content->array.raid_disks,
1265 content->array.layout, clean, avail))
1266 fprintf(stderr, " - not enough to start the array while not clean - consider --force.\n");
1267 else {
1268 if (req_cnt == (unsigned)content->array.raid_disks)
1269 fprintf(stderr, " - need all %d to start it",
1270 req_cnt);
1271 else
1272 fprintf(stderr, " - need %d to start", req_cnt);
1273 fprintf(stderr, " (use --run to insist).\n");
1274 }
1275 }
1276 return 1;
1277 }
1278
1279 int Assemble(struct supertype *st, char *mddev,
1280 struct mddev_ident *ident,
1281 struct mddev_dev *devlist,
1282 struct context *c)
1283 {
1284 /*
1285 * The task of Assemble is to find a collection of
1286 * devices that should (according to their superblocks)
1287 * form an array, and to give this collection to the MD driver.
1288 * In Linux-2.4 and later, this involves submitting a
1289 * SET_ARRAY_INFO ioctl with no arg - to prepare
1290 * the array - and then submit a number of
1291 * ADD_NEW_DISK ioctls to add disks into
1292 * the array. Finally RUN_ARRAY might
1293 * be submitted to start the array.
1294 *
1295 * Much of the work of Assemble is in finding and/or
1296 * checking the disks to make sure they look right.
1297 *
1298 * If mddev is not set, then scan must be set and we
1299 * read through the config file for dev+uuid mapping
1300 * We recurse, setting mddev, for each device that
1301 * - isn't running
1302 * - has a valid uuid (or any uuid if !uuidset)
1303 *
1304 * If mddev is set, we try to determine state of md.
1305 * check version - must be at least 0.90.0
1306 * check kernel version. must be at least 2.4.
1307 * If not, we can possibly fall back on START_ARRAY
1308 * Try to GET_ARRAY_INFO.
1309 * If possible, give up
1310 * If not, try to STOP_ARRAY just to make sure
1311 *
1312 * If !uuidset and scan, look in conf-file for uuid
1313 * If not found, give up
1314 * If !devlist and scan and uuidset, get list of devs from conf-file
1315 *
1316 * For each device:
1317 * Check superblock - discard if bad
1318 * Check uuid (set if we don't have one) - discard if no match
1319 * Check superblock similarity if we have a superblock - discard if different
1320 * Record events, devicenum
1321 * This should give us a list of devices for the array
1322 * We should collect the most recent event number
1323 *
1324 * Count disks with recent enough event count
1325 * While force && !enough disks
1326 * Choose newest rejected disks, update event count
1327 * mark clean and rewrite superblock
1328 * If recent kernel:
1329 * SET_ARRAY_INFO
1330 * foreach device with recent events : ADD_NEW_DISK
1331 * if runstop == 1 || "enough" disks and runstop==0 -> RUN_ARRAY
1332 * If old kernel:
1333 * Check the device numbers in superblock are right
1334 * update superblock if any changes
1335 * START_ARRAY
1336 *
1337 */
1338 int rv = -1;
1339 int mdfd = -1;
1340 int clean;
1341 int auto_assem = (mddev == NULL && !ident->uuid_set &&
1342 ident->super_minor == UnSet && ident->name[0] == 0 &&
1343 (ident->container == NULL || ident->member == NULL));
1344 struct devs *devices = NULL;
1345 char *devmap;
1346 int *best = NULL; /* indexed by raid_disk */
1347 int bestcnt = 0;
1348 int devcnt;
1349 unsigned int okcnt, sparecnt, rebuilding_cnt, replcnt, journalcnt;
1350 int journal_clean = 0;
1351 int i;
1352 int was_forced = 0;
1353 int most_recent = 0;
1354 int chosen_drive;
1355 int change = 0;
1356 int inargv = 0;
1357 int start_partial_ok = (c->runstop >= 0) &&
1358 (c->force || devlist==NULL || auto_assem);
1359 int num_devs;
1360 struct mddev_dev *tmpdev;
1361 struct mdinfo info;
1362 struct mdinfo *content = NULL;
1363 struct mdinfo *pre_exist = NULL;
1364 char *avail;
1365 char *name = NULL;
1366 char chosen_name[1024];
1367 struct map_ent *map = NULL;
1368 struct map_ent *mp;
1369
1370 /*
1371 * If any subdevs are listed, then any that don't
1372 * match ident are discarded. Remainder must all match and
1373 * become the array.
1374 * If no subdevs, then we scan all devices in the config file, but
1375 * there must be something in the identity
1376 */
1377
1378 if (!devlist &&
1379 ident->uuid_set == 0 &&
1380 (ident->super_minor < 0 || ident->super_minor == UnSet) &&
1381 ident->name[0] == 0 &&
1382 (ident->container == NULL || ident->member == NULL) &&
1383 ident->devices == NULL) {
1384 pr_err("No identity information available for %s - cannot assemble.\n",
1385 mddev ? mddev : "further assembly");
1386 return 1;
1387 }
1388
1389 if (devlist == NULL)
1390 devlist = conf_get_devs();
1391 else if (mddev)
1392 inargv = 1;
1393
1394 try_again:
1395 /* We come back here when doing auto-assembly and attempting some
1396 * set of devices failed. Those are now marked as ->used==2 and
1397 * we ignore them and try again
1398 */
1399 if (!st && ident->st)
1400 st = ident->st;
1401 if (c->verbose>0)
1402 pr_err("looking for devices for %s\n",
1403 mddev ? mddev : "further assembly");
1404
1405 content = &info;
1406 if (st && c->force)
1407 st->ignore_hw_compat = 1;
1408 num_devs = select_devices(devlist, ident, &st, &content, c,
1409 inargv, auto_assem);
1410 if (num_devs < 0)
1411 return 1;
1412
1413 if (!st || !st->sb || !content)
1414 return 2;
1415
1416 /* We have a full set of devices - we now need to find the
1417 * array device.
1418 * However there is a risk that we are racing with "mdadm -I"
1419 * and the array is already partially assembled - we will have
1420 * rejected any devices already in this address.
1421 * So we take a lock on the map file - to prevent further races -
1422 * and look for the uuid in there. If found and the array is
1423 * active, we abort. If found and the array is not active
1424 * we commit to that md device and add all the contained devices
1425 * to our list. We flag them so that we don't try to re-add,
1426 * but can remove if they turn out to not be wanted.
1427 */
1428 if (map_lock(&map))
1429 pr_err("failed to get exclusive lock on mapfile - continue anyway...\n");
1430 if (c->update && strcmp(c->update,"uuid") == 0)
1431 mp = NULL;
1432 else
1433 mp = map_by_uuid(&map, content->uuid);
1434 if (mp) {
1435 struct mdinfo *dv;
1436 /* array already exists. */
1437 pre_exist = sysfs_read(-1, mp->devnm, GET_LEVEL|GET_DEVS);
1438 if (pre_exist->array.level != UnSet) {
1439 pr_err("Found some drive for an array that is already active: %s\n",
1440 mp->path);
1441 pr_err("giving up.\n");
1442 goto out;
1443 }
1444 for (dv = pre_exist->devs; dv; dv = dv->next) {
1445 /* We want to add this device to our list,
1446 * but it could already be there if "mdadm -I"
1447 * started *after* we checked for O_EXCL.
1448 * If we add it to the top of the list
1449 * it will be preferred over later copies.
1450 */
1451 struct mddev_dev *newdev;
1452 char *devname = map_dev(dv->disk.major,
1453 dv->disk.minor,
1454 0);
1455 if (!devname)
1456 continue;
1457 newdev = xmalloc(sizeof(*newdev));
1458 newdev->devname = devname;
1459 newdev->disposition = 'I';
1460 newdev->used = 1;
1461 newdev->next = devlist;
1462 devlist = newdev;
1463 num_devs++;
1464 }
1465 strcpy(chosen_name, mp->path);
1466 if (c->verbose > 0 || mddev == NULL ||
1467 strcmp(mddev, chosen_name) != 0)
1468 pr_err("Merging with already-assembled %s\n",
1469 chosen_name);
1470 mdfd = open_dev_excl(mp->devnm);
1471 } else {
1472 int trustworthy = FOREIGN;
1473 name = content->name;
1474 switch (st->ss->match_home(st, c->homehost)
1475 ?: st->ss->match_home(st, "any")) {
1476 case 1:
1477 trustworthy = LOCAL;
1478 name = strchr(content->name, ':');
1479 if (name)
1480 name++;
1481 else
1482 name = content->name;
1483 break;
1484 }
1485 if (!auto_assem)
1486 /* If the array is listed in mdadm.conf or on
1487 * command line, then we trust the name
1488 * even if the array doesn't look local
1489 */
1490 trustworthy = LOCAL;
1491
1492 if (name[0] == 0 &&
1493 content->array.level == LEVEL_CONTAINER) {
1494 name = content->text_version;
1495 trustworthy = METADATA;
1496 }
1497
1498 if (name[0] && trustworthy != LOCAL &&
1499 ! c->require_homehost &&
1500 conf_name_is_free(name))
1501 trustworthy = LOCAL;
1502
1503 if (trustworthy == LOCAL &&
1504 strchr(name, ':'))
1505 /* Ignore 'host:' prefix of name */
1506 name = strchr(name, ':')+1;
1507
1508 mdfd = create_mddev(mddev, name, ident->autof, trustworthy,
1509 chosen_name, 0);
1510 }
1511 if (mdfd < 0) {
1512 st->ss->free_super(st);
1513 if (auto_assem)
1514 goto try_again;
1515 goto out;
1516 }
1517 mddev = chosen_name;
1518 if (pre_exist == NULL) {
1519 if (mddev_busy(fd2devnm(mdfd))) {
1520 pr_err("%s already active, cannot restart it!\n",
1521 mddev);
1522 for (tmpdev = devlist ;
1523 tmpdev && tmpdev->used != 1;
1524 tmpdev = tmpdev->next)
1525 ;
1526 if (tmpdev && auto_assem)
1527 pr_err("%s needed for %s...\n",
1528 mddev, tmpdev->devname);
1529 close(mdfd);
1530 mdfd = -3;
1531 st->ss->free_super(st);
1532 if (auto_assem)
1533 goto try_again;
1534 goto out;
1535 }
1536 /* just incase it was started but has no content */
1537 ioctl(mdfd, STOP_ARRAY, NULL);
1538 }
1539
1540 if (content != &info) {
1541 /* This is a member of a container. Try starting the array. */
1542 int err;
1543 err = assemble_container_content(st, mdfd, content, c,
1544 chosen_name, NULL);
1545 close(mdfd);
1546 return err;
1547 }
1548
1549 /* Ok, no bad inconsistancy, we can try updating etc */
1550 devices = xcalloc(num_devs, sizeof(*devices));
1551 devmap = xcalloc(num_devs, content->array.raid_disks);
1552 devcnt = load_devices(devices, devmap, ident, &st, devlist,
1553 c, content, mdfd, mddev,
1554 &most_recent, &bestcnt, &best, inargv);
1555 if (devcnt < 0) {
1556 mdfd = -3;
1557 /*
1558 * devices is already freed in load_devices, so set devices
1559 * to NULL to avoid double free devices.
1560 */
1561 devices = NULL;
1562 goto out;
1563 }
1564
1565 if (devcnt == 0) {
1566 pr_err("no devices found for %s\n",
1567 mddev);
1568 if (st)
1569 st->ss->free_super(st);
1570 free(devmap);
1571 goto out;
1572 }
1573
1574 if (c->update && strcmp(c->update, "byteorder")==0)
1575 st->minor_version = 90;
1576
1577 st->ss->getinfo_super(st, content, NULL);
1578 clean = content->array.state & 1;
1579
1580 /* now we have some devices that might be suitable.
1581 * I wonder how many
1582 */
1583 avail = xcalloc(content->array.raid_disks, 1);
1584 okcnt = 0;
1585 replcnt = 0;
1586 sparecnt=0;
1587 journalcnt=0;
1588 rebuilding_cnt=0;
1589 for (i=0; i< bestcnt; i++) {
1590 int j = best[i];
1591 int event_margin = 1; /* always allow a difference of '1'
1592 * like the kernel does
1593 */
1594 if (j < 0) continue;
1595 /* note: we ignore error flags in multipath arrays
1596 * as they don't make sense
1597 */
1598 if (content->array.level != LEVEL_MULTIPATH) {
1599 if (devices[j].i.disk.state & (1<<MD_DISK_JOURNAL)) {
1600 if (content->journal_device_required)
1601 journalcnt++;
1602 else /* unexpected journal, mark as faulty */
1603 devices[j].i.disk.state |= (1<<MD_DISK_FAULTY);
1604 } else if (!(devices[j].i.disk.state & (1<<MD_DISK_ACTIVE))) {
1605 if (!(devices[j].i.disk.state
1606 & (1<<MD_DISK_FAULTY))) {
1607 devices[j].uptodate = 1;
1608 sparecnt++;
1609 }
1610 continue;
1611 }
1612 }
1613 /* If this device thinks that 'most_recent' has failed, then
1614 * we must reject this device.
1615 */
1616 if (j != most_recent && !c->force &&
1617 content->array.raid_disks > 0 &&
1618 devices[most_recent].i.disk.raid_disk >= 0 &&
1619 devmap[j * content->array.raid_disks + devices[most_recent].i.disk.raid_disk] == 0) {
1620 if (c->verbose > -1)
1621 pr_err("ignoring %s as it reports %s as failed\n",
1622 devices[j].devname, devices[most_recent].devname);
1623 best[i] = -1;
1624 continue;
1625 }
1626 /* Require event counter to be same as, or just less than,
1627 * most recent. If it is bigger, it must be a stray spare and
1628 * should be ignored.
1629 */
1630 if (devices[j].i.events+event_margin >=
1631 devices[most_recent].i.events &&
1632 devices[j].i.events <=
1633 devices[most_recent].i.events
1634 ) {
1635 devices[j].uptodate = 1;
1636 if (devices[j].i.disk.state & (1<<MD_DISK_JOURNAL))
1637 journal_clean = 1;
1638 if (i < content->array.raid_disks * 2) {
1639 if (devices[j].i.recovery_start == MaxSector ||
1640 (content->reshape_active &&
1641 i >= content->array.raid_disks - content->delta_disks)) {
1642 if (!avail[i/2]) {
1643 okcnt++;
1644 avail[i/2]=1;
1645 } else
1646 replcnt++;
1647 } else
1648 rebuilding_cnt++;
1649 } else if (devices[j].i.disk.raid_disk != MD_DISK_ROLE_JOURNAL)
1650 sparecnt++;
1651 }
1652 }
1653 free(devmap);
1654 if (c->force) {
1655 int force_ok = force_array(content, devices, best, bestcnt,
1656 avail, most_recent, st, c);
1657 okcnt += force_ok;
1658 if (force_ok)
1659 was_forced = 1;
1660 }
1661 /* Now we want to look at the superblock which the kernel will base things on
1662 * and compare the devices that we think are working with the devices that the
1663 * superblock thinks are working.
1664 * If there are differences and --force is given, then update this chosen
1665 * superblock.
1666 */
1667 chosen_drive = -1;
1668 st->ss->free_super(st);
1669 for (i=0; chosen_drive < 0 && i<bestcnt; i+=2) {
1670 int j = best[i];
1671 int fd;
1672
1673 if (j<0)
1674 continue;
1675 if (!devices[j].uptodate)
1676 continue;
1677 if (devices[j].i.events < devices[most_recent].i.events)
1678 continue;
1679 chosen_drive = j;
1680 if ((fd=dev_open(devices[j].devname,
1681 devices[j].included ? O_RDONLY
1682 : (O_RDONLY|O_EXCL)))< 0) {
1683 pr_err("Cannot open %s: %s\n",
1684 devices[j].devname, strerror(errno));
1685 goto out;
1686 }
1687 if (st->ss->load_super(st,fd, NULL)) {
1688 close(fd);
1689 pr_err("RAID superblock has disappeared from %s\n",
1690 devices[j].devname);
1691 goto out;
1692 }
1693 close(fd);
1694 }
1695 if (st->sb == NULL) {
1696 pr_err("No suitable drives found for %s\n", mddev);
1697 goto out;
1698 }
1699 st->ss->getinfo_super(st, content, NULL);
1700 if (sysfs_init(content, mdfd, NULL)) {
1701 pr_err("Unable to initialize sysfs\n");
1702 goto out;
1703 }
1704
1705 /* after reload context, store journal_clean in context */
1706 content->journal_clean = journal_clean;
1707 for (i=0; i<bestcnt; i++) {
1708 int j = best[i];
1709 unsigned int desired_state;
1710
1711 if (j < 0)
1712 continue;
1713 if (devices[j].i.disk.raid_disk == MD_DISK_ROLE_JOURNAL)
1714 desired_state = (1<<MD_DISK_JOURNAL);
1715 else if (i >= content->array.raid_disks * 2)
1716 desired_state = 0;
1717 else if (i & 1)
1718 desired_state = (1<<MD_DISK_ACTIVE) | (1<<MD_DISK_REPLACEMENT);
1719 else
1720 desired_state = (1<<MD_DISK_ACTIVE) | (1<<MD_DISK_SYNC);
1721
1722 desired_state |= devices[j].i.disk.state & ((1<<MD_DISK_FAILFAST) |
1723 (1<<MD_DISK_WRITEMOSTLY));
1724
1725 if (!devices[j].uptodate)
1726 continue;
1727
1728 devices[j].i.disk.state = desired_state;
1729 if (!(devices[j].i.array.state & 1))
1730 clean = 0;
1731
1732 if (st->ss->update_super(st, &devices[j].i, "assemble", NULL,
1733 c->verbose, 0, NULL)) {
1734 if (c->force) {
1735 if (c->verbose >= 0)
1736 pr_err("clearing FAULTY flag for device %d in %s for %s\n",
1737 j, mddev, devices[j].devname);
1738 change = 1;
1739 } else {
1740 if (c->verbose >= -1)
1741 pr_err("device %d in %s has wrong state in superblock, but %s seems ok\n",
1742 i, mddev, devices[j].devname);
1743 }
1744 }
1745 #if 0
1746 if (!(super.disks[i].i.disk.state & (1 << MD_DISK_FAULTY))) {
1747 pr_err("devices %d of %s is not marked FAULTY in superblock, but cannot be found\n",
1748 i, mddev);
1749 }
1750 #endif
1751 }
1752 if (c->force && !clean &&
1753 !enough(content->array.level, content->array.raid_disks,
1754 content->array.layout, clean,
1755 avail)) {
1756 change += st->ss->update_super(st, content, "force-array",
1757 devices[chosen_drive].devname, c->verbose,
1758 0, NULL);
1759 was_forced = 1;
1760 clean = 1;
1761 }
1762
1763 if (change) {
1764 int fd;
1765 fd = dev_open(devices[chosen_drive].devname,
1766 devices[chosen_drive].included ?
1767 O_RDWR : (O_RDWR|O_EXCL));
1768 if (fd < 0) {
1769 pr_err("Could not open %s for write - cannot Assemble array.\n",
1770 devices[chosen_drive].devname);
1771 goto out;
1772 }
1773 if (st->ss->store_super(st, fd)) {
1774 close(fd);
1775 pr_err("Could not re-write superblock on %s\n",
1776 devices[chosen_drive].devname);
1777 goto out;
1778 }
1779 if (c->verbose >= 0)
1780 pr_err("Marking array %s as 'clean'\n",
1781 mddev);
1782 close(fd);
1783 }
1784
1785 /* If we are in the middle of a reshape we may need to restore saved data
1786 * that was moved aside due to the reshape overwriting live data
1787 * The code of doing this lives in Grow.c
1788 */
1789 if (content->reshape_active &&
1790 !(content->reshape_active & RESHAPE_NO_BACKUP)) {
1791 int err = 0;
1792 int *fdlist = xmalloc(sizeof(int)* bestcnt);
1793 if (c->verbose > 0)
1794 pr_err("%s has an active reshape - checking if critical section needs to be restored\n",
1795 chosen_name);
1796 if (!c->backup_file)
1797 c->backup_file = locate_backup(content->sys_name);
1798 enable_fds(bestcnt/2);
1799 for (i = 0; i < bestcnt/2; i++) {
1800 int j = best[i*2];
1801 if (j >= 0) {
1802 fdlist[i] = dev_open(devices[j].devname,
1803 devices[j].included
1804 ? O_RDWR : (O_RDWR|O_EXCL));
1805 if (fdlist[i] < 0) {
1806 pr_err("Could not open %s for write - cannot Assemble array.\n",
1807 devices[j].devname);
1808 err = 1;
1809 break;
1810 }
1811 } else
1812 fdlist[i] = -1;
1813 }
1814 if (!err) {
1815 if (st->ss->external && st->ss->recover_backup)
1816 err = st->ss->recover_backup(st, content);
1817 else
1818 err = Grow_restart(st, content, fdlist, bestcnt/2,
1819 c->backup_file, c->verbose > 0);
1820 if (err && c->invalid_backup) {
1821 if (c->verbose > 0)
1822 pr_err("continuing without restoring backup\n");
1823 err = 0;
1824 }
1825 }
1826 while (i>0) {
1827 i--;
1828 if (fdlist[i]>=0) close(fdlist[i]);
1829 }
1830 free(fdlist);
1831 if (err) {
1832 pr_err("Failed to restore critical section for reshape, sorry.\n");
1833 if (c->backup_file == NULL)
1834 cont_err("Possibly you needed to specify the --backup-file\n");
1835 goto out;
1836 }
1837 }
1838
1839 /* Almost ready to actually *do* something */
1840 /* First, fill in the map, so that udev can find our name
1841 * as soon as we become active.
1842 */
1843 if (c->update && strcmp(c->update, "metadata")==0) {
1844 content->array.major_version = 1;
1845 content->array.minor_version = 0;
1846 strcpy(content->text_version, "1.0");
1847 }
1848
1849 map_update(&map, fd2devnm(mdfd), content->text_version,
1850 content->uuid, chosen_name);
1851
1852 rv = start_array(mdfd, mddev, content,
1853 st, ident, best, bestcnt,
1854 chosen_drive, devices, okcnt, sparecnt,
1855 rebuilding_cnt, journalcnt,
1856 c,
1857 clean, avail, start_partial_ok,
1858 pre_exist != NULL,
1859 was_forced);
1860 if (rv == 1 && !pre_exist)
1861 ioctl(mdfd, STOP_ARRAY, NULL);
1862 free(devices);
1863 out:
1864 map_unlock(&map);
1865 if (rv == 0) {
1866 wait_for(chosen_name, mdfd);
1867 close(mdfd);
1868 if (auto_assem) {
1869 int usecs = 1;
1870 /* There is a nasty race with 'mdadm --monitor'.
1871 * If it opens this device before we close it,
1872 * it gets an incomplete open on which IO
1873 * doesn't work and the capacity is
1874 * wrong.
1875 * If we reopen (to check for layered devices)
1876 * before --monitor closes, we loose.
1877 *
1878 * So: wait upto 1 second for there to be
1879 * a non-zero capacity.
1880 */
1881 while (usecs < 1000) {
1882 mdfd = open(mddev, O_RDONLY);
1883 if (mdfd >= 0) {
1884 unsigned long long size;
1885 if (get_dev_size(mdfd, NULL, &size) &&
1886 size > 0)
1887 break;
1888 close(mdfd);
1889 }
1890 usleep(usecs);
1891 usecs <<= 1;
1892 }
1893 }
1894 } else if (mdfd >= 0)
1895 close(mdfd);
1896
1897 /* '2' means 'OK, but not started yet' */
1898 if (rv == -1) {
1899 free(devices);
1900 return 1;
1901 }
1902 return rv == 2 ? 0 : rv;
1903 }
1904
1905 int assemble_container_content(struct supertype *st, int mdfd,
1906 struct mdinfo *content, struct context *c,
1907 char *chosen_name, int *result)
1908 {
1909 struct mdinfo *dev, *sra, *dev2;
1910 int working = 0, preexist = 0;
1911 int expansion = 0;
1912 int old_raid_disks;
1913 int start_reshape;
1914 char *avail;
1915 int err;
1916
1917 if (sysfs_init(content, mdfd, NULL)) {
1918 pr_err("Unable to initialize sysfs\n");
1919 return 1;
1920 }
1921
1922 sra = sysfs_read(mdfd, NULL, GET_VERSION|GET_DEVS);
1923 if (sra == NULL || strcmp(sra->text_version, content->text_version) != 0) {
1924 if (content->array.major_version == -1 &&
1925 content->array.minor_version == -2 &&
1926 c->readonly &&
1927 content->text_version[0] == '/')
1928 content->text_version[0] = '-';
1929 if (sysfs_set_array(content, 9003) != 0) {
1930 sysfs_free(sra);
1931 return 1;
1932 }
1933 }
1934
1935 /* There are two types of reshape: container wide or sub-array specific
1936 * Check if metadata requests blocking container wide reshapes
1937 */
1938 start_reshape = (content->reshape_active &&
1939 !((content->reshape_active == CONTAINER_RESHAPE) &&
1940 (content->array.state & (1<<MD_SB_BLOCK_CONTAINER_RESHAPE))));
1941
1942 /* Block subarray here if it is under reshape now
1943 * Do not allow for any changes in this array
1944 */
1945 if (st->ss->external && content->recovery_blocked && start_reshape)
1946 block_subarray(content);
1947
1948 for (dev2 = sra->devs; dev2; dev2 = dev2->next) {
1949 for (dev = content->devs; dev; dev = dev->next)
1950 if (dev2->disk.major == dev->disk.major &&
1951 dev2->disk.minor == dev->disk.minor)
1952 break;
1953 if (dev)
1954 continue;
1955 /* Don't want this one any more */
1956 if (sysfs_set_str(sra, dev2, "slot", "none") < 0 &&
1957 errno == EBUSY) {
1958 pr_err("Cannot remove old device %s: not updating %s\n", dev2->sys_name, sra->sys_name);
1959 sysfs_free(sra);
1960 return 1;
1961 }
1962 sysfs_set_str(sra, dev2, "state", "remove");
1963 }
1964 old_raid_disks = content->array.raid_disks - content->delta_disks;
1965 avail = xcalloc(content->array.raid_disks, 1);
1966 for (dev = content->devs; dev; dev = dev->next) {
1967 if (dev->disk.raid_disk >= 0)
1968 avail[dev->disk.raid_disk] = 1;
1969 if (sysfs_add_disk(content, dev, 1) == 0) {
1970 if (dev->disk.raid_disk >= old_raid_disks &&
1971 content->reshape_active)
1972 expansion++;
1973 else
1974 working++;
1975 } else if (errno == EEXIST)
1976 preexist++;
1977 }
1978 sysfs_free(sra);
1979 if (working + expansion == 0 && c->runstop <= 0) {
1980 free(avail);
1981 return 1;/* Nothing new, don't try to start */
1982 }
1983 map_update(NULL, fd2devnm(mdfd), content->text_version,
1984 content->uuid, chosen_name);
1985
1986 if (content->consistency_policy == CONSISTENCY_POLICY_PPL &&
1987 st->ss->validate_ppl) {
1988 content->array.state |= 1;
1989 err = 0;
1990
1991 for (dev = content->devs; dev; dev = dev->next) {
1992 int dfd;
1993 char *devpath;
1994 int ret;
1995
1996 ret = st->ss->validate_ppl(st, content, dev);
1997 if (ret == 0)
1998 continue;
1999
2000 if (ret < 0) {
2001 err = 1;
2002 break;
2003 }
2004
2005 if (!c->force) {
2006 pr_err("%s contains invalid PPL - consider --force or --update-subarray with --update=no-ppl\n",
2007 chosen_name);
2008 content->array.state &= ~1;
2009 avail[dev->disk.raid_disk] = 0;
2010 break;
2011 }
2012
2013 /* have --force - overwrite the invalid ppl */
2014 devpath = map_dev(dev->disk.major, dev->disk.minor, 0);
2015 dfd = dev_open(devpath, O_RDWR);
2016 if (dfd < 0) {
2017 pr_err("Failed to open %s\n", devpath);
2018 err = 1;
2019 break;
2020 }
2021
2022 err = st->ss->write_init_ppl(st, content, dfd);
2023 close(dfd);
2024
2025 if (err)
2026 break;
2027 }
2028
2029 if (err) {
2030 free(avail);
2031 return err;
2032 }
2033 }
2034
2035 if (enough(content->array.level, content->array.raid_disks,
2036 content->array.layout, content->array.state & 1, avail) == 0) {
2037 if (c->export && result)
2038 *result |= INCR_NO;
2039 else if (c->verbose >= 0) {
2040 pr_err("%s assembled with %d device%s",
2041 chosen_name, preexist + working,
2042 preexist + working == 1 ? "":"s");
2043 if (preexist)
2044 fprintf(stderr, " (%d new)", working);
2045 fprintf(stderr, " but not started\n");
2046 }
2047 free(avail);
2048 return 1;
2049 }
2050 free(avail);
2051
2052 if (c->runstop <= 0 &&
2053 (working + preexist + expansion) <
2054 content->array.working_disks) {
2055 if (c->export && result)
2056 *result |= INCR_UNSAFE;
2057 else if (c->verbose >= 0) {
2058 pr_err("%s assembled with %d device%s",
2059 chosen_name, preexist + working,
2060 preexist + working == 1 ? "":"s");
2061 if (preexist)
2062 fprintf(stderr, " (%d new)", working);
2063 fprintf(stderr, " but not safe to start\n");
2064 }
2065 return 1;
2066 }
2067
2068
2069 if (start_reshape) {
2070 int spare = content->array.raid_disks + expansion;
2071 if (restore_backup(st, content,
2072 working,
2073 spare, &c->backup_file, c->verbose) == 1)
2074 return 1;
2075
2076 if (content->reshape_progress == 0) {
2077 /* If reshape progress is 0 - we are assembling the
2078 * array that was stopped, before reshape has started.
2079 * Array needs to be started as active, Grow_continue()
2080 * will start the reshape.
2081 */
2082 sysfs_set_num(content, NULL, "reshape_position",
2083 MaxSector);
2084 err = sysfs_set_str(content, NULL,
2085 "array_state", "active");
2086 sysfs_set_num(content, NULL, "reshape_position", 0);
2087 } else {
2088 err = sysfs_set_str(content, NULL,
2089 "array_state", "readonly");
2090 }
2091
2092 if (err)
2093 return 1;
2094
2095 if (st->ss->external) {
2096 if (!mdmon_running(st->container_devnm))
2097 start_mdmon(st->container_devnm);
2098 ping_monitor(st->container_devnm);
2099 if (mdmon_running(st->container_devnm) &&
2100 st->update_tail == NULL)
2101 st->update_tail = &st->updates;
2102 }
2103
2104 err = Grow_continue(mdfd, st, content, c->backup_file,
2105 0, c->freeze_reshape);
2106 } else switch(content->array.level) {
2107 case LEVEL_LINEAR:
2108 case LEVEL_MULTIPATH:
2109 case 0:
2110 err = sysfs_set_str(content, NULL, "array_state",
2111 c->readonly ? "readonly" : "active");
2112 break;
2113 default:
2114 err = sysfs_set_str(content, NULL, "array_state",
2115 "readonly");
2116 /* start mdmon if needed. */
2117 if (!err) {
2118 if (!mdmon_running(st->container_devnm))
2119 start_mdmon(st->container_devnm);
2120 ping_monitor(st->container_devnm);
2121 }
2122 break;
2123 }
2124 if (!err)
2125 sysfs_set_safemode(content, content->safe_mode_delay);
2126
2127 /* Block subarray here if it is not reshaped now
2128 * It has be blocked a little later to allow mdmon to switch in
2129 * in to R/W state
2130 */
2131 if (st->ss->external && content->recovery_blocked &&
2132 !start_reshape)
2133 block_subarray(content);
2134
2135 if (c->export && result) {
2136 if (err)
2137 *result |= INCR_NO;
2138 else
2139 *result |= INCR_YES;
2140 } else if (c->verbose >= 0) {
2141 if (err)
2142 pr_err("array %s now has %d device%s",
2143 chosen_name, working + preexist,
2144 working + preexist == 1 ? "":"s");
2145 else {
2146 sysfs_rules_apply(chosen_name, content);
2147 pr_err("Started %s with %d device%s",
2148 chosen_name, working + preexist,
2149 working + preexist == 1 ? "":"s");
2150 }
2151 if (preexist)
2152 fprintf(stderr, " (%d new)", working);
2153 if (expansion)
2154 fprintf(stderr, " ( + %d for expansion)",
2155 expansion);
2156 fprintf(stderr, "\n");
2157 }
2158 if (!err)
2159 wait_for(chosen_name, mdfd);
2160 return err;
2161 /* FIXME should have an O_EXCL and wait for read-auto */
2162 }
Unnamed repository; edit this file 'description' to name the repository.