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[thirdparty/mdadm.git] / Assemble.c
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 <ctype.h>
27
28 static int name_matches(char *found, char *required, char *homehost)
29 {
30 /* See if the name found matches the required name, possibly
31 * prefixed with 'homehost'
32 */
33 char fnd[33];
34
35 strncpy(fnd, found, 32);
36 fnd[32] = 0;
37 if (strcmp(found, required)==0)
38 return 1;
39 if (homehost) {
40 int l = strlen(homehost);
41 if (l < 32 && fnd[l] == ':' &&
42 strcmp(fnd+l+1, required)==0)
43 return 1;
44 }
45 return 0;
46 }
47
48 static int is_member_busy(char *metadata_version)
49 {
50 /* check if the given member array is active */
51 struct mdstat_ent *mdstat = mdstat_read(1, 0);
52 struct mdstat_ent *ent;
53 int busy = 0;
54
55 for (ent = mdstat; ent; ent = ent->next) {
56 if (ent->metadata_version == NULL)
57 continue;
58 if (strncmp(ent->metadata_version, "external:", 9) != 0)
59 continue;
60 if (!is_subarray(&ent->metadata_version[9]))
61 continue;
62 /* Skip first char - it can be '/' or '-' */
63 if (strcmp(&ent->metadata_version[10], metadata_version+1) == 0) {
64 busy = 1;
65 break;
66 }
67 }
68 free_mdstat(mdstat);
69
70 return busy;
71 }
72
73 static int ident_matches(struct mddev_ident *ident,
74 struct mdinfo *content,
75 struct supertype *tst,
76 char *homehost,
77 char *update, char *devname)
78 {
79
80 if (ident->uuid_set && (!update || strcmp(update, "uuid")!= 0) &&
81 same_uuid(content->uuid, ident->uuid, tst->ss->swapuuid)==0) {
82 if (devname)
83 fprintf(stderr, Name ": %s has wrong uuid.\n",
84 devname);
85 return 0;
86 }
87 if (ident->name[0] && (!update || strcmp(update, "name")!= 0) &&
88 name_matches(content->name, ident->name, homehost)==0) {
89 if (devname)
90 fprintf(stderr, Name ": %s has wrong name.\n",
91 devname);
92 return 0;
93 }
94 if (ident->super_minor != UnSet &&
95 ident->super_minor != content->array.md_minor) {
96 if (devname)
97 fprintf(stderr, Name ": %s has wrong super-minor.\n",
98 devname);
99 return 0;
100 }
101 if (ident->level != UnSet &&
102 ident->level != content->array.level) {
103 if (devname)
104 fprintf(stderr, Name ": %s has wrong raid level.\n",
105 devname);
106 return 0;
107 }
108 if (ident->raid_disks != UnSet &&
109 ident->raid_disks!= content->array.raid_disks) {
110 if (devname)
111 fprintf(stderr, Name ": %s requires wrong number of drives.\n",
112 devname);
113 return 0;
114 }
115 if (ident->member && ident->member[0]) {
116 /* content->text_version must match */
117 char *s = strchr(content->text_version+1, '/');
118 if (s == NULL) {
119 if (devname)
120 fprintf(stderr, Name ": %s is not a container and one is required.\n",
121 devname);
122 return 0;
123 } else if (strcmp(ident->member, s+1) != 0) {
124 if (devname)
125 fprintf(stderr, Name ": skipping wrong member %s is %s\n",
126 content->text_version, devname);
127 return 0;
128 }
129 }
130 return 1;
131 }
132
133
134 int Assemble(struct supertype *st, char *mddev,
135 struct mddev_ident *ident,
136 struct mddev_dev *devlist, char *backup_file,
137 int readonly, int runstop,
138 char *update, char *homehost, int require_homehost,
139 int verbose, int force)
140 {
141 /*
142 * The task of Assemble is to find a collection of
143 * devices that should (according to their superblocks)
144 * form an array, and to give this collection to the MD driver.
145 * In Linux-2.4 and later, this involves submitting a
146 * SET_ARRAY_INFO ioctl with no arg - to prepare
147 * the array - and then submit a number of
148 * ADD_NEW_DISK ioctls to add disks into
149 * the array. Finally RUN_ARRAY might
150 * be submitted to start the array.
151 *
152 * Much of the work of Assemble is in finding and/or
153 * checking the disks to make sure they look right.
154 *
155 * If mddev is not set, then scan must be set and we
156 * read through the config file for dev+uuid mapping
157 * We recurse, setting mddev, for each device that
158 * - isn't running
159 * - has a valid uuid (or any uuid if !uuidset)
160 *
161 * If mddev is set, we try to determine state of md.
162 * check version - must be at least 0.90.0
163 * check kernel version. must be at least 2.4.
164 * If not, we can possibly fall back on START_ARRAY
165 * Try to GET_ARRAY_INFO.
166 * If possible, give up
167 * If not, try to STOP_ARRAY just to make sure
168 *
169 * If !uuidset and scan, look in conf-file for uuid
170 * If not found, give up
171 * If !devlist and scan and uuidset, get list of devs from conf-file
172 *
173 * For each device:
174 * Check superblock - discard if bad
175 * Check uuid (set if we don't have one) - discard if no match
176 * Check superblock similarity if we have a superblock - discard if different
177 * Record events, devicenum
178 * This should give us a list of devices for the array
179 * We should collect the most recent event number
180 *
181 * Count disks with recent enough event count
182 * While force && !enough disks
183 * Choose newest rejected disks, update event count
184 * mark clean and rewrite superblock
185 * If recent kernel:
186 * SET_ARRAY_INFO
187 * foreach device with recent events : ADD_NEW_DISK
188 * if runstop == 1 || "enough" disks and runstop==0 -> RUN_ARRAY
189 * If old kernel:
190 * Check the device numbers in superblock are right
191 * update superblock if any changes
192 * START_ARRAY
193 *
194 */
195 int mdfd;
196 int clean;
197 int auto_assem = (mddev == NULL && !ident->uuid_set &&
198 ident->super_minor == UnSet && ident->name[0] == 0
199 && (ident->container == NULL || ident->member == NULL));
200 int old_linux = 0;
201 int vers = vers; /* Keep gcc quite - it really is initialised */
202 struct {
203 char *devname;
204 int uptodate; /* set once we decide that this device is as
205 * recent as everything else in the array.
206 */
207 struct mdinfo i;
208 } *devices;
209 char *devmap;
210 int *best = NULL; /* indexed by raid_disk */
211 int bestcnt = 0;
212 int devcnt = 0;
213 unsigned int okcnt, sparecnt, rebuilding_cnt;
214 unsigned int req_cnt;
215 int i;
216 int most_recent = 0;
217 int chosen_drive;
218 int change = 0;
219 int inargv = 0;
220 int report_missmatch;
221 int bitmap_done;
222 int start_partial_ok = (runstop >= 0) &&
223 (force || devlist==NULL || auto_assem);
224 unsigned int num_devs;
225 struct mddev_dev *tmpdev;
226 struct mdinfo info;
227 struct mdinfo *content = NULL;
228 char *avail;
229 int nextspare = 0;
230 char *name = NULL;
231 int trustworthy;
232 char chosen_name[1024];
233
234 if (get_linux_version() < 2004000)
235 old_linux = 1;
236
237 /*
238 * If any subdevs are listed, then any that don't
239 * match ident are discarded. Remainder must all match and
240 * become the array.
241 * If no subdevs, then we scan all devices in the config file, but
242 * there must be something in the identity
243 */
244
245 if (!devlist &&
246 ident->uuid_set == 0 &&
247 (ident->super_minor < 0 || ident->super_minor == UnSet) &&
248 ident->name[0] == 0 &&
249 (ident->container == NULL || ident->member == NULL) &&
250 ident->devices == NULL) {
251 fprintf(stderr, Name ": No identity information available for %s - cannot assemble.\n",
252 mddev ? mddev : "further assembly");
253 return 1;
254 }
255
256 if (devlist == NULL)
257 devlist = conf_get_devs();
258 else if (mddev)
259 inargv = 1;
260
261 report_missmatch = ((inargv && verbose >= 0) || verbose > 0);
262 try_again:
263 /* We come back here when doing auto-assembly and attempting some
264 * set of devices failed. Those are now marked as ->used==2 and
265 * we ignore them and try again
266 */
267
268 tmpdev = devlist; num_devs = 0;
269 while (tmpdev) {
270 if (tmpdev->used)
271 tmpdev->used = 2;
272 else
273 num_devs++;
274 tmpdev = tmpdev->next;
275 }
276
277 if (!st && ident->st) st = ident->st;
278
279 if (verbose>0)
280 fprintf(stderr, Name ": looking for devices for %s\n",
281 mddev ? mddev : "further assembly");
282
283 /* first walk the list of devices to find a consistent set
284 * that match the criterea, if that is possible.
285 * We flag the ones we like with 'used'.
286 */
287 for (tmpdev = devlist;
288 tmpdev;
289 tmpdev = tmpdev->next) {
290 char *devname = tmpdev->devname;
291 int dfd;
292 struct stat stb;
293 struct supertype *tst = dup_super(st);
294 struct dev_policy *pol = NULL;
295
296 if (tmpdev->used > 1) continue;
297
298 if (ident->devices &&
299 !match_oneof(ident->devices, devname)) {
300 if (report_missmatch)
301 fprintf(stderr, Name ": %s is not one of %s\n", devname, ident->devices);
302 continue;
303 }
304
305 dfd = dev_open(devname, O_RDONLY|O_EXCL);
306 if (dfd < 0) {
307 if (report_missmatch)
308 fprintf(stderr, Name ": cannot open device %s: %s\n",
309 devname, strerror(errno));
310 tmpdev->used = 2;
311 } else if (fstat(dfd, &stb)< 0) {
312 /* Impossible! */
313 fprintf(stderr, Name ": fstat failed for %s: %s\n",
314 devname, strerror(errno));
315 tmpdev->used = 2;
316 } else if ((stb.st_mode & S_IFMT) != S_IFBLK) {
317 fprintf(stderr, Name ": %s is not a block device.\n",
318 devname);
319 tmpdev->used = 2;
320 } else if (!tst && (tst = guess_super(dfd)) == NULL) {
321 if (report_missmatch)
322 fprintf(stderr, Name ": no recogniseable superblock on %s\n",
323 devname);
324 tmpdev->used = 2;
325 } else if (tst->ss->load_super(tst,dfd, NULL)) {
326 if (report_missmatch)
327 fprintf(stderr, Name ": no RAID superblock on %s\n",
328 devname);
329 tmpdev->used = 2;
330 } else if (tst->ss->compare_super == NULL) {
331 if (report_missmatch)
332 fprintf(stderr, Name ": Cannot assemble %s metadata on %s\n",
333 tst->ss->name, devname);
334 tmpdev->used = 2;
335 } else if (auto_assem && st == NULL &&
336 !conf_test_metadata(tst->ss->name, (pol = devnum_policy(stb.st_rdev)),
337 tst->ss->match_home(tst, homehost) == 1)) {
338 if (report_missmatch)
339 fprintf(stderr, Name ": %s has metadata type %s for which "
340 "auto-assembly is disabled\n",
341 devname, tst->ss->name);
342 tmpdev->used = 2;
343 } else {
344 content = &info;
345 memset(content, 0, sizeof(*content));
346 tst->ss->getinfo_super(tst, content, NULL);
347 }
348 if (dfd >= 0) close(dfd);
349 if (tmpdev->used == 2) {
350 if (auto_assem)
351 /* Ignore unrecognised devices during auto-assembly */
352 goto loop;
353 if (ident->uuid_set || ident->name[0] ||
354 ident->super_minor != UnSet)
355 /* Ignore unrecognised device if looking for
356 * specific array */
357 goto loop;
358
359
360 fprintf(stderr, Name ": %s has no superblock - assembly aborted\n",
361 devname);
362 if (st)
363 st->ss->free_super(st);
364 dev_policy_free(pol);
365 return 1;
366 }
367
368 if (tst->ss->container_content
369 && tst->loaded_container) {
370 /* tmpdev is a container. We need to be either
371 * looking for a member, or auto-assembling
372 */
373 if (st) {
374 /* already found some components, this cannot
375 * be another one.
376 */
377 if (report_missmatch)
378 fprintf(stderr, Name ": %s is a container, but we are looking for components\n",
379 devname);
380 goto loop;
381 }
382
383 if (ident->container) {
384 if (ident->container[0] == '/' &&
385 !same_dev(ident->container, devname)) {
386 if (report_missmatch)
387 fprintf(stderr, Name ": %s is not the container required (%s)\n",
388 devname, ident->container);
389 goto loop;
390 }
391 if (ident->container[0] != '/') {
392 /* we have a uuid */
393 int uuid[4];
394 if (!parse_uuid(ident->container, uuid) ||
395 !same_uuid(content->uuid, uuid, tst->ss->swapuuid)) {
396 if (report_missmatch)
397 fprintf(stderr, Name ": %s has wrong UUID to be required container\n",
398 devname);
399 goto loop;
400 }
401 }
402 }
403 /* It is worth looking inside this container.
404 */
405 if (verbose > 0)
406 fprintf(stderr, Name ": looking in container %s\n",
407 devname);
408
409 for (content = tst->ss->container_content(tst, NULL);
410 content;
411 content = content->next) {
412
413 if (!ident_matches(ident, content, tst,
414 homehost, update,
415 report_missmatch ? devname : NULL))
416 /* message already printed */;
417 else if (is_member_busy(content->text_version)) {
418 if (report_missmatch)
419 fprintf(stderr, Name ": member %s in %s is already assembled\n",
420 content->text_version,
421 devname);
422 } else
423 break;
424 }
425 if (!content) {
426 tmpdev->used = 2;
427 goto loop; /* empty container */
428 }
429
430 st = tst; tst = NULL;
431 if (!auto_assem && inargv && tmpdev->next != NULL) {
432 fprintf(stderr, Name ": %s is a container, but is not "
433 "only device given: confused and aborting\n",
434 devname);
435 st->ss->free_super(st);
436 dev_policy_free(pol);
437 return 1;
438 }
439 if (verbose > 0)
440 fprintf(stderr, Name ": found match on member %s in %s\n",
441 content->text_version, devname);
442 break;
443 }
444
445 if (!ident_matches(ident, content, tst,
446 homehost, update,
447 report_missmatch ? devname : NULL))
448 goto loop;
449
450 if (st == NULL)
451 st = dup_super(tst);
452 if (st->minor_version == -1)
453 st->minor_version = tst->minor_version;
454 if (st->ss != tst->ss ||
455 st->minor_version != tst->minor_version ||
456 st->ss->compare_super(st, tst) != 0) {
457 /* Some mismatch. If exactly one array matches this host,
458 * we can resolve on that one.
459 * Or, if we are auto assembling, we just ignore the second
460 * for now.
461 */
462 if (auto_assem)
463 goto loop;
464 if (homehost) {
465 int first = st->ss->match_home(st, homehost);
466 int last = tst->ss->match_home(tst, homehost);
467 if (first != last &&
468 (first == 1 || last == 1)) {
469 /* We can do something */
470 if (first) {/* just ignore this one */
471 if (report_missmatch)
472 fprintf(stderr, Name ": %s misses out due to wrong homehost\n",
473 devname);
474 goto loop;
475 } else { /* reject all those sofar */
476 struct mddev_dev *td;
477 if (report_missmatch)
478 fprintf(stderr, Name ": %s overrides previous devices due to good homehost\n",
479 devname);
480 for (td=devlist; td != tmpdev; td=td->next)
481 if (td->used == 1)
482 td->used = 0;
483 tmpdev->used = 1;
484 goto loop;
485 }
486 }
487 }
488 fprintf(stderr, Name ": superblock on %s doesn't match others - assembly aborted\n",
489 devname);
490 tst->ss->free_super(tst);
491 st->ss->free_super(st);
492 dev_policy_free(pol);
493 return 1;
494 }
495
496 tmpdev->used = 1;
497
498 loop:
499 dev_policy_free(pol);
500 pol = NULL;
501 if (tst)
502 tst->ss->free_super(tst);
503 }
504
505 if (!st || !st->sb || !content)
506 return 2;
507
508 /* Now need to open the array device. Use create_mddev */
509 if (content == &info)
510 st->ss->getinfo_super(st, content, NULL);
511
512 trustworthy = FOREIGN;
513 name = content->name;
514 switch (st->ss->match_home(st, homehost)
515 ?: st->ss->match_home(st, "any")) {
516 case 1:
517 trustworthy = LOCAL;
518 name = strchr(content->name, ':');
519 if (name)
520 name++;
521 else
522 name = content->name;
523 break;
524 }
525 if (!auto_assem)
526 /* If the array is listed in mdadm.conf or on
527 * command line, then we trust the name
528 * even if the array doesn't look local
529 */
530 trustworthy = LOCAL;
531
532 if (name[0] == 0 &&
533 content->array.level == LEVEL_CONTAINER) {
534 name = content->text_version;
535 trustworthy = METADATA;
536 }
537
538 if (name[0] && trustworthy != LOCAL &&
539 ! require_homehost &&
540 conf_name_is_free(name))
541 trustworthy = LOCAL;
542
543 if (trustworthy == LOCAL &&
544 strchr(name, ':'))
545 /* Ignore 'host:' prefix of name */
546 name = strchr(name, ':')+1;
547
548 mdfd = create_mddev(mddev, name, ident->autof, trustworthy,
549 chosen_name);
550 if (mdfd < 0) {
551 st->ss->free_super(st);
552 if (auto_assem)
553 goto try_again;
554 return 1;
555 }
556 mddev = chosen_name;
557 vers = md_get_version(mdfd);
558 if (vers < 9000) {
559 fprintf(stderr, Name ": Assemble requires driver version 0.90.0 or later.\n"
560 " Upgrade your kernel or try --build\n");
561 close(mdfd);
562 return 1;
563 }
564 if (mddev_busy(fd2devnum(mdfd))) {
565 fprintf(stderr, Name ": %s already active, cannot restart it!\n",
566 mddev);
567 for (tmpdev = devlist ;
568 tmpdev && tmpdev->used != 1;
569 tmpdev = tmpdev->next)
570 ;
571 if (tmpdev && auto_assem)
572 fprintf(stderr, Name ": %s needed for %s...\n",
573 mddev, tmpdev->devname);
574 close(mdfd);
575 mdfd = -3;
576 st->ss->free_super(st);
577 if (auto_assem)
578 goto try_again;
579 return 1;
580 }
581 ioctl(mdfd, STOP_ARRAY, NULL); /* just incase it was started but has no content */
582
583 #ifndef MDASSEMBLE
584 if (content != &info) {
585 /* This is a member of a container. Try starting the array. */
586 return assemble_container_content(st, mdfd, content, runstop,
587 chosen_name, verbose);
588 }
589 #endif
590 /* Ok, no bad inconsistancy, we can try updating etc */
591 bitmap_done = 0;
592 content->update_private = NULL;
593 devices = malloc(num_devs * sizeof(*devices));
594 devmap = calloc(num_devs * content->array.raid_disks, 1);
595 for (tmpdev = devlist; tmpdev; tmpdev=tmpdev->next) if (tmpdev->used == 1) {
596 char *devname = tmpdev->devname;
597 struct stat stb;
598 /* looks like a good enough match to update the super block if needed */
599 #ifndef MDASSEMBLE
600 if (update) {
601 int dfd;
602 /* prepare useful information in info structures */
603 struct stat stb2;
604 struct supertype *tst;
605 int err;
606 fstat(mdfd, &stb2);
607
608 if (strcmp(update, "uuid")==0 &&
609 !ident->uuid_set) {
610 int rfd;
611 if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
612 read(rfd, ident->uuid, 16) != 16) {
613 *(__u32*)(ident->uuid) = random();
614 *(__u32*)(ident->uuid+1) = random();
615 *(__u32*)(ident->uuid+2) = random();
616 *(__u32*)(ident->uuid+3) = random();
617 }
618 if (rfd >= 0) close(rfd);
619 }
620 dfd = dev_open(devname, O_RDWR|O_EXCL);
621
622 remove_partitions(dfd);
623
624 tst = dup_super(st);
625 if (dfd < 0 || tst->ss->load_super(tst, dfd, NULL) != 0) {
626 fprintf(stderr, Name ": cannot re-read metadata from %s - aborting\n",
627 devname);
628 if (dfd >= 0)
629 close(dfd);
630 close(mdfd);
631 free(devices);
632 free(devmap);
633 return 1;
634 }
635 tst->ss->getinfo_super(tst, content, devmap + devcnt * content->array.raid_disks);
636
637 memcpy(content->uuid, ident->uuid, 16);
638 strcpy(content->name, ident->name);
639 content->array.md_minor = minor(stb2.st_rdev);
640
641 if (strcmp(update, "byteorder") == 0)
642 err = 0;
643 else
644 err = tst->ss->update_super(tst, content, update,
645 devname, verbose,
646 ident->uuid_set,
647 homehost);
648 if (err < 0) {
649 fprintf(stderr,
650 Name ": --update=%s not understood"
651 " for %s metadata\n",
652 update, tst->ss->name);
653 tst->ss->free_super(tst);
654 free(tst);
655 close(mdfd);
656 close(dfd);
657 free(devices);
658 free(devmap);
659 return 1;
660 }
661 if (strcmp(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 fprintf(stderr, Name ": Could not re-write superblock on %s.\n",
668 devname);
669 close(dfd);
670
671 if (strcmp(update, "uuid")==0 &&
672 ident->bitmap_fd >= 0 && !bitmap_done) {
673 if (bitmap_update_uuid(ident->bitmap_fd,
674 content->uuid,
675 tst->ss->swapuuid) != 0)
676 fprintf(stderr, Name ": Could not update uuid on external bitmap.\n");
677 else
678 bitmap_done = 1;
679 }
680 tst->ss->free_super(tst);
681 } else
682 #endif
683 {
684 struct supertype *tst = dup_super(st);
685 int dfd;
686 dfd = dev_open(devname, O_RDWR|O_EXCL);
687
688 remove_partitions(dfd);
689
690 if (dfd < 0 || tst->ss->load_super(tst, dfd, NULL) != 0) {
691 fprintf(stderr, Name ": cannot re-read metadata from %s - aborting\n",
692 devname);
693 if (dfd >= 0)
694 close(dfd);
695 close(mdfd);
696 free(devices);
697 free(devmap);
698 return 1;
699 }
700 tst->ss->getinfo_super(tst, content, devmap + devcnt * content->array.raid_disks);
701 tst->ss->free_super(tst);
702 close(dfd);
703 }
704
705 stat(devname, &stb);
706
707 if (verbose > 0)
708 fprintf(stderr, Name ": %s is identified as a member of %s, slot %d.\n",
709 devname, mddev, content->disk.raid_disk);
710 devices[devcnt].devname = devname;
711 devices[devcnt].uptodate = 0;
712 devices[devcnt].i = *content;
713 devices[devcnt].i.disk.major = major(stb.st_rdev);
714 devices[devcnt].i.disk.minor = minor(stb.st_rdev);
715 if (most_recent < devcnt) {
716 if (devices[devcnt].i.events
717 > devices[most_recent].i.events)
718 most_recent = devcnt;
719 }
720 if (content->array.level == LEVEL_MULTIPATH)
721 /* with multipath, the raid_disk from the superblock is meaningless */
722 i = devcnt;
723 else
724 i = devices[devcnt].i.disk.raid_disk;
725 if (i+1 == 0) {
726 if (nextspare < content->array.raid_disks)
727 nextspare = content->array.raid_disks;
728 i = nextspare++;
729 } else {
730 if (i >= content->array.raid_disks &&
731 i >= nextspare)
732 nextspare = i+1;
733 }
734 if (i < 10000) {
735 if (i >= bestcnt) {
736 int newbestcnt = i+10;
737 int *newbest = malloc(sizeof(int)*newbestcnt);
738 int c;
739 for (c=0; c < newbestcnt; c++)
740 if (c < bestcnt)
741 newbest[c] = best[c];
742 else
743 newbest[c] = -1;
744 if (best)free(best);
745 best = newbest;
746 bestcnt = newbestcnt;
747 }
748 if (best[i] >=0 &&
749 devices[best[i]].i.events
750 == devices[devcnt].i.events
751 && (devices[best[i]].i.disk.minor
752 != devices[devcnt].i.disk.minor)
753 && st->ss == &super0
754 && content->array.level != LEVEL_MULTIPATH) {
755 /* two different devices with identical superblock.
756 * Could be a mis-detection caused by overlapping
757 * partitions. fail-safe.
758 */
759 fprintf(stderr, Name ": WARNING %s and %s appear"
760 " to have very similar superblocks.\n"
761 " If they are really different, "
762 "please --zero the superblock on one\n"
763 " If they are the same or overlap,"
764 " please remove one from %s.\n",
765 devices[best[i]].devname, devname,
766 inargv ? "the list" :
767 "the\n DEVICE list in mdadm.conf"
768 );
769 close(mdfd);
770 free(devices);
771 free(devmap);
772 return 1;
773 }
774 if (best[i] == -1
775 || (devices[best[i]].i.events
776 < devices[devcnt].i.events))
777 best[i] = devcnt;
778 }
779 devcnt++;
780 }
781 free(content->update_private);
782 content->update_private = NULL;
783
784 if (devcnt == 0) {
785 fprintf(stderr, Name ": no devices found for %s\n",
786 mddev);
787 if (st)
788 st->ss->free_super(st);
789 close(mdfd);
790 free(devices);
791 free(devmap);
792 return 1;
793 }
794
795 if (update && strcmp(update, "byteorder")==0)
796 st->minor_version = 90;
797
798 st->ss->getinfo_super(st, content, NULL);
799 clean = content->array.state & 1;
800
801 /* now we have some devices that might be suitable.
802 * I wonder how many
803 */
804 avail = malloc(content->array.raid_disks);
805 memset(avail, 0, content->array.raid_disks);
806 okcnt = 0;
807 sparecnt=0;
808 rebuilding_cnt=0;
809 for (i=0; i< bestcnt; i++) {
810 int j = best[i];
811 int event_margin = 1; /* always allow a difference of '1'
812 * like the kernel does
813 */
814 if (j < 0) continue;
815 /* note: we ignore error flags in multipath arrays
816 * as they don't make sense
817 */
818 if (content->array.level != LEVEL_MULTIPATH)
819 if (!(devices[j].i.disk.state & (1<<MD_DISK_ACTIVE))) {
820 if (!(devices[j].i.disk.state
821 & (1<<MD_DISK_FAULTY)))
822 sparecnt++;
823 continue;
824 }
825 /* If this devices thinks that 'most_recent' has failed, then
826 * we must reject this device.
827 */
828 if (j != most_recent &&
829 content->array.raid_disks > 0 &&
830 devices[most_recent].i.disk.raid_disk >= 0 &&
831 devmap[j * content->array.raid_disks + devices[most_recent].i.disk.raid_disk] == 0) {
832 if (verbose > -1)
833 fprintf(stderr, Name ": ignoring %s as it reports %s as failed\n",
834 devices[j].devname, devices[most_recent].devname);
835 best[i] = -1;
836 continue;
837 }
838 if (devices[j].i.events+event_margin >=
839 devices[most_recent].i.events) {
840 devices[j].uptodate = 1;
841 if (i < content->array.raid_disks) {
842 if (devices[j].i.recovery_start == MaxSector) {
843 okcnt++;
844 avail[i]=1;
845 } else
846 rebuilding_cnt++;
847 } else
848 sparecnt++;
849 }
850 }
851 free(devmap);
852 while (force && !enough(content->array.level, content->array.raid_disks,
853 content->array.layout, 1,
854 avail, okcnt)) {
855 /* Choose the newest best drive which is
856 * not up-to-date, update the superblock
857 * and add it.
858 */
859 int fd;
860 struct supertype *tst;
861 unsigned long long current_events;
862 chosen_drive = -1;
863 for (i = 0; i < content->array.raid_disks && i < bestcnt; i++) {
864 int j = best[i];
865 if (j>=0 &&
866 !devices[j].uptodate &&
867 devices[j].i.recovery_start == MaxSector &&
868 (chosen_drive < 0 ||
869 devices[j].i.events
870 > devices[chosen_drive].i.events))
871 chosen_drive = j;
872 }
873 if (chosen_drive < 0)
874 break;
875 current_events = devices[chosen_drive].i.events;
876 add_another:
877 if (verbose >= 0)
878 fprintf(stderr, Name ": forcing event count in %s(%d) from %d upto %d\n",
879 devices[chosen_drive].devname,
880 devices[chosen_drive].i.disk.raid_disk,
881 (int)(devices[chosen_drive].i.events),
882 (int)(devices[most_recent].i.events));
883 fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL);
884 if (fd < 0) {
885 fprintf(stderr, Name ": Couldn't open %s for write - not updating\n",
886 devices[chosen_drive].devname);
887 devices[chosen_drive].i.events = 0;
888 continue;
889 }
890 tst = dup_super(st);
891 if (tst->ss->load_super(tst,fd, NULL)) {
892 close(fd);
893 fprintf(stderr, Name ": RAID superblock disappeared from %s - not updating.\n",
894 devices[chosen_drive].devname);
895 devices[chosen_drive].i.events = 0;
896 continue;
897 }
898 content->events = devices[most_recent].i.events;
899 tst->ss->update_super(tst, content, "force-one",
900 devices[chosen_drive].devname, verbose,
901 0, NULL);
902
903 if (tst->ss->store_super(tst, fd)) {
904 close(fd);
905 fprintf(stderr, Name ": Could not re-write superblock on %s\n",
906 devices[chosen_drive].devname);
907 devices[chosen_drive].i.events = 0;
908 tst->ss->free_super(tst);
909 continue;
910 }
911 close(fd);
912 devices[chosen_drive].i.events = devices[most_recent].i.events;
913 devices[chosen_drive].uptodate = 1;
914 avail[chosen_drive] = 1;
915 okcnt++;
916 tst->ss->free_super(tst);
917
918 /* If there are any other drives of the same vintage,
919 * add them in as well. We can't lose and we might gain
920 */
921 for (i = 0; i < content->array.raid_disks && i < bestcnt ; i++) {
922 int j = best[i];
923 if (j >= 0 &&
924 !devices[j].uptodate &&
925 devices[j].i.events == current_events) {
926 chosen_drive = j;
927 goto add_another;
928 }
929 }
930 }
931
932 /* Now we want to look at the superblock which the kernel will base things on
933 * and compare the devices that we think are working with the devices that the
934 * superblock thinks are working.
935 * If there are differences and --force is given, then update this chosen
936 * superblock.
937 */
938 chosen_drive = -1;
939 st->ss->free_super(st);
940 for (i=0; chosen_drive < 0 && i<bestcnt; i++) {
941 int j = best[i];
942 int fd;
943
944 if (j<0)
945 continue;
946 if (!devices[j].uptodate)
947 continue;
948 chosen_drive = j;
949 if ((fd=dev_open(devices[j].devname, O_RDONLY|O_EXCL))< 0) {
950 fprintf(stderr, Name ": Cannot open %s: %s\n",
951 devices[j].devname, strerror(errno));
952 close(mdfd);
953 free(devices);
954 return 1;
955 }
956 if (st->ss->load_super(st,fd, NULL)) {
957 close(fd);
958 fprintf(stderr, Name ": RAID superblock has disappeared from %s\n",
959 devices[j].devname);
960 close(mdfd);
961 free(devices);
962 return 1;
963 }
964 close(fd);
965 }
966 if (st->sb == NULL) {
967 fprintf(stderr, Name ": No suitable drives found for %s\n", mddev);
968 close(mdfd);
969 free(devices);
970 return 1;
971 }
972 st->ss->getinfo_super(st, content, NULL);
973 #ifndef MDASSEMBLE
974 sysfs_init(content, mdfd, 0);
975 #endif
976 for (i=0; i<bestcnt; i++) {
977 int j = best[i];
978 unsigned int desired_state;
979
980 if (i < content->array.raid_disks)
981 desired_state = (1<<MD_DISK_ACTIVE) | (1<<MD_DISK_SYNC);
982 else
983 desired_state = 0;
984
985 if (j<0)
986 continue;
987 if (!devices[j].uptodate)
988 continue;
989
990 devices[j].i.disk.state = desired_state;
991 if (!(devices[j].i.array.state & 1))
992 clean = 0;
993
994 if (st->ss->update_super(st, &devices[j].i, "assemble", NULL,
995 verbose, 0, NULL)) {
996 if (force) {
997 if (verbose >= 0)
998 fprintf(stderr, Name ": "
999 "clearing FAULTY flag for device %d in %s for %s\n",
1000 j, mddev, devices[j].devname);
1001 change = 1;
1002 } else {
1003 if (verbose >= -1)
1004 fprintf(stderr, Name ": "
1005 "device %d in %s has wrong state in superblock, but %s seems ok\n",
1006 i, mddev, devices[j].devname);
1007 }
1008 }
1009 #if 0
1010 if (!(super.disks[i].i.disk.state & (1 << MD_DISK_FAULTY))) {
1011 fprintf(stderr, Name ": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n",
1012 i, mddev);
1013 }
1014 #endif
1015 }
1016 if (force && !clean &&
1017 !enough(content->array.level, content->array.raid_disks,
1018 content->array.layout, clean,
1019 avail, okcnt)) {
1020 change += st->ss->update_super(st, content, "force-array",
1021 devices[chosen_drive].devname, verbose,
1022 0, NULL);
1023 clean = 1;
1024 }
1025
1026 if (change) {
1027 int fd;
1028 fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL);
1029 if (fd < 0) {
1030 fprintf(stderr, Name ": Could not open %s for write - cannot Assemble array.\n",
1031 devices[chosen_drive].devname);
1032 close(mdfd);
1033 free(devices);
1034 return 1;
1035 }
1036 if (st->ss->store_super(st, fd)) {
1037 close(fd);
1038 fprintf(stderr, Name ": Could not re-write superblock on %s\n",
1039 devices[chosen_drive].devname);
1040 close(mdfd);
1041 free(devices);
1042 return 1;
1043 }
1044 close(fd);
1045 }
1046
1047 /* If we are in the middle of a reshape we may need to restore saved data
1048 * that was moved aside due to the reshape overwriting live data
1049 * The code of doing this lives in Grow.c
1050 */
1051 #ifndef MDASSEMBLE
1052 if (content->reshape_active) {
1053 int err = 0;
1054 int *fdlist = malloc(sizeof(int)* bestcnt);
1055 if (verbose > 0)
1056 fprintf(stderr, Name ":%s has an active reshape - checking "
1057 "if critical section needs to be restored\n",
1058 chosen_name);
1059 for (i=0; i<bestcnt; i++) {
1060 int j = best[i];
1061 if (j >= 0) {
1062 fdlist[i] = dev_open(devices[j].devname, O_RDWR|O_EXCL);
1063 if (fdlist[i] < 0) {
1064 fprintf(stderr, Name ": Could not open %s for write - cannot Assemble array.\n",
1065 devices[j].devname);
1066 err = 1;
1067 break;
1068 }
1069 } else
1070 fdlist[i] = -1;
1071 }
1072 if (!err)
1073 err = Grow_restart(st, content, fdlist, bestcnt, backup_file, verbose > 0);
1074 while (i>0) {
1075 i--;
1076 if (fdlist[i]>=0) close(fdlist[i]);
1077 }
1078 if (err) {
1079 fprintf(stderr, Name ": Failed to restore critical section for reshape, sorry.\n");
1080 if (backup_file == NULL)
1081 fprintf(stderr," Possibly you needed to specify the --backup-file\n");
1082 close(mdfd);
1083 free(devices);
1084 return err;
1085 }
1086 }
1087 #endif
1088 /* count number of in-sync devices according to the superblock.
1089 * We must have this number to start the array without -s or -R
1090 */
1091 req_cnt = content->array.working_disks;
1092
1093 /* Almost ready to actually *do* something */
1094 if (!old_linux) {
1095 int rv;
1096
1097 /* First, fill in the map, so that udev can find our name
1098 * as soon as we become active.
1099 */
1100 map_update(NULL, fd2devnum(mdfd), content->text_version,
1101 content->uuid, chosen_name);
1102
1103 rv = set_array_info(mdfd, st, content);
1104 if (rv) {
1105 fprintf(stderr, Name ": failed to set array info for %s: %s\n",
1106 mddev, strerror(errno));
1107 ioctl(mdfd, STOP_ARRAY, NULL);
1108 close(mdfd);
1109 free(devices);
1110 return 1;
1111 }
1112 if (ident->bitmap_fd >= 0) {
1113 if (ioctl(mdfd, SET_BITMAP_FILE, ident->bitmap_fd) != 0) {
1114 fprintf(stderr, Name ": SET_BITMAP_FILE failed.\n");
1115 ioctl(mdfd, STOP_ARRAY, NULL);
1116 close(mdfd);
1117 free(devices);
1118 return 1;
1119 }
1120 } else if (ident->bitmap_file) {
1121 /* From config file */
1122 int bmfd = open(ident->bitmap_file, O_RDWR);
1123 if (bmfd < 0) {
1124 fprintf(stderr, Name ": Could not open bitmap file %s\n",
1125 ident->bitmap_file);
1126 ioctl(mdfd, STOP_ARRAY, NULL);
1127 close(mdfd);
1128 free(devices);
1129 return 1;
1130 }
1131 if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) {
1132 fprintf(stderr, Name ": Failed to set bitmapfile for %s\n", mddev);
1133 close(bmfd);
1134 ioctl(mdfd, STOP_ARRAY, NULL);
1135 close(mdfd);
1136 free(devices);
1137 return 1;
1138 }
1139 close(bmfd);
1140 }
1141
1142 /* First, add the raid disks, but add the chosen one last */
1143 for (i=0; i<= bestcnt; i++) {
1144 int j;
1145 if (i < bestcnt) {
1146 j = best[i];
1147 if (j == chosen_drive)
1148 continue;
1149 } else
1150 j = chosen_drive;
1151
1152 if (j >= 0 /* && devices[j].uptodate */) {
1153 rv = add_disk(mdfd, st, content, &devices[j].i);
1154
1155 if (rv) {
1156 fprintf(stderr, Name ": failed to add "
1157 "%s to %s: %s\n",
1158 devices[j].devname,
1159 mddev,
1160 strerror(errno));
1161 if (i < content->array.raid_disks
1162 || i == bestcnt)
1163 okcnt--;
1164 else
1165 sparecnt--;
1166 } else if (verbose > 0)
1167 fprintf(stderr, Name ": added %s "
1168 "to %s as %d\n",
1169 devices[j].devname, mddev,
1170 devices[j].i.disk.raid_disk);
1171 } else if (verbose > 0 && i < content->array.raid_disks)
1172 fprintf(stderr, Name ": no uptodate device for "
1173 "slot %d of %s\n",
1174 i, mddev);
1175 }
1176
1177 if (content->array.level == LEVEL_CONTAINER) {
1178 if (verbose >= 0) {
1179 fprintf(stderr, Name ": Container %s has been "
1180 "assembled with %d drive%s",
1181 mddev, okcnt+sparecnt, okcnt+sparecnt==1?"":"s");
1182 if (okcnt < (unsigned)content->array.raid_disks)
1183 fprintf(stderr, " (out of %d)",
1184 content->array.raid_disks);
1185 fprintf(stderr, "\n");
1186 }
1187 sysfs_uevent(content, "change");
1188 wait_for(chosen_name, mdfd);
1189 close(mdfd);
1190 free(devices);
1191 return 0;
1192 }
1193
1194 if (runstop == 1 ||
1195 (runstop <= 0 &&
1196 ( enough(content->array.level, content->array.raid_disks,
1197 content->array.layout, clean, avail, okcnt) &&
1198 (okcnt + rebuilding_cnt >= req_cnt || start_partial_ok)
1199 ))) {
1200 /* This array is good-to-go.
1201 * If a reshape is in progress then we might need to
1202 * continue monitoring it. In that case we start
1203 * it read-only and let the grow code make it writable.
1204 */
1205 int rv;
1206 #ifndef MDASSEMBLE
1207 if (content->reshape_active &&
1208 content->delta_disks <= 0)
1209 rv = Grow_continue(mdfd, st, content, backup_file);
1210 else
1211 #endif
1212 rv = ioctl(mdfd, RUN_ARRAY, NULL);
1213 if (rv == 0) {
1214 if (verbose >= 0) {
1215 fprintf(stderr, Name ": %s has been started with %d drive%s",
1216 mddev, okcnt, okcnt==1?"":"s");
1217 if (okcnt < (unsigned)content->array.raid_disks)
1218 fprintf(stderr, " (out of %d)", content->array.raid_disks);
1219 if (rebuilding_cnt)
1220 fprintf(stderr, "%s %d rebuilding", sparecnt?",":" and", rebuilding_cnt);
1221 if (sparecnt)
1222 fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s");
1223 fprintf(stderr, ".\n");
1224 }
1225 if (content->reshape_active &&
1226 content->array.level >= 4 &&
1227 content->array.level <= 6) {
1228 /* might need to increase the size
1229 * of the stripe cache - default is 256
1230 */
1231 if (256 < 4 * (content->array.chunk_size/4096)) {
1232 struct mdinfo *sra = sysfs_read(mdfd, 0, 0);
1233 if (sra)
1234 sysfs_set_num(sra, NULL,
1235 "stripe_cache_size",
1236 (4 * content->array.chunk_size / 4096) + 1);
1237 }
1238 }
1239 if (okcnt < (unsigned)content->array.raid_disks) {
1240 /* If any devices did not get added
1241 * because the kernel rejected them based
1242 * on event count, try adding them
1243 * again providing the action policy is
1244 * 're-add' or greater. The bitmap
1245 * might allow them to be included, or
1246 * they will become spares.
1247 */
1248 for (i = 0; i <= bestcnt; i++) {
1249 int j = best[i];
1250 if (j >= 0 && !devices[j].uptodate) {
1251 if (!disk_action_allows(&devices[j].i, st->ss->name, act_re_add))
1252 continue;
1253 rv = add_disk(mdfd, st, content,
1254 &devices[j].i);
1255 if (rv == 0 && verbose >= 0)
1256 fprintf(stderr,
1257 Name ": %s has been re-added.\n",
1258 devices[j].devname);
1259 }
1260 }
1261 }
1262 wait_for(mddev, mdfd);
1263 close(mdfd);
1264 if (auto_assem) {
1265 int usecs = 1;
1266 /* There is a nasty race with 'mdadm --monitor'.
1267 * If it opens this device before we close it,
1268 * it gets an incomplete open on which IO
1269 * doesn't work and the capacity is
1270 * wrong.
1271 * If we reopen (to check for layered devices)
1272 * before --monitor closes, we loose.
1273 *
1274 * So: wait upto 1 second for there to be
1275 * a non-zero capacity.
1276 */
1277 while (usecs < 1000) {
1278 mdfd = open(mddev, O_RDONLY);
1279 if (mdfd >= 0) {
1280 unsigned long long size;
1281 if (get_dev_size(mdfd, NULL, &size) &&
1282 size > 0)
1283 break;
1284 close(mdfd);
1285 }
1286 usleep(usecs);
1287 usecs <<= 1;
1288 }
1289 }
1290 free(devices);
1291 return 0;
1292 }
1293 fprintf(stderr, Name ": failed to RUN_ARRAY %s: %s\n",
1294 mddev, strerror(errno));
1295
1296 if (!enough(content->array.level, content->array.raid_disks,
1297 content->array.layout, 1, avail, okcnt))
1298 fprintf(stderr, Name ": Not enough devices to "
1299 "start the array.\n");
1300 else if (!enough(content->array.level,
1301 content->array.raid_disks,
1302 content->array.layout, clean,
1303 avail, okcnt))
1304 fprintf(stderr, Name ": Not enough devices to "
1305 "start the array while not clean "
1306 "- consider --force.\n");
1307
1308 if (auto_assem)
1309 ioctl(mdfd, STOP_ARRAY, NULL);
1310 close(mdfd);
1311 free(devices);
1312 return 1;
1313 }
1314 if (runstop == -1) {
1315 fprintf(stderr, Name ": %s assembled from %d drive%s",
1316 mddev, okcnt, okcnt==1?"":"s");
1317 if (okcnt != (unsigned)content->array.raid_disks)
1318 fprintf(stderr, " (out of %d)", content->array.raid_disks);
1319 fprintf(stderr, ", but not started.\n");
1320 close(mdfd);
1321 free(devices);
1322 return 0;
1323 }
1324 if (verbose >= -1) {
1325 fprintf(stderr, Name ": %s assembled from %d drive%s", mddev, okcnt, okcnt==1?"":"s");
1326 if (rebuilding_cnt)
1327 fprintf(stderr, "%s %d rebuilding", sparecnt?", ":" and ", rebuilding_cnt);
1328 if (sparecnt)
1329 fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s");
1330 if (!enough(content->array.level, content->array.raid_disks,
1331 content->array.layout, 1, avail, okcnt))
1332 fprintf(stderr, " - not enough to start the array.\n");
1333 else if (!enough(content->array.level,
1334 content->array.raid_disks,
1335 content->array.layout, clean,
1336 avail, okcnt))
1337 fprintf(stderr, " - not enough to start the "
1338 "array while not clean - consider "
1339 "--force.\n");
1340 else {
1341 if (req_cnt == (unsigned)content->array.raid_disks)
1342 fprintf(stderr, " - need all %d to start it", req_cnt);
1343 else
1344 fprintf(stderr, " - need %d of %d to start", req_cnt, content->array.raid_disks);
1345 fprintf(stderr, " (use --run to insist).\n");
1346 }
1347 }
1348 if (auto_assem)
1349 ioctl(mdfd, STOP_ARRAY, NULL);
1350 close(mdfd);
1351 free(devices);
1352 return 1;
1353 } else {
1354 /* The "chosen_drive" is a good choice, and if necessary, the superblock has
1355 * been updated to point to the current locations of devices.
1356 * so we can just start the array
1357 */
1358 unsigned long dev;
1359 dev = makedev(devices[chosen_drive].i.disk.major,
1360 devices[chosen_drive].i.disk.minor);
1361 if (ioctl(mdfd, START_ARRAY, dev)) {
1362 fprintf(stderr, Name ": Cannot start array: %s\n",
1363 strerror(errno));
1364 }
1365
1366 }
1367 close(mdfd);
1368 free(devices);
1369 return 0;
1370 }
1371
1372 #ifndef MDASSEMBLE
1373 int assemble_container_content(struct supertype *st, int mdfd,
1374 struct mdinfo *content, int runstop,
1375 char *chosen_name, int verbose)
1376 {
1377 struct mdinfo *dev, *sra;
1378 int working = 0, preexist = 0;
1379 struct map_ent *map = NULL;
1380
1381 sysfs_init(content, mdfd, 0);
1382
1383 sra = sysfs_read(mdfd, 0, GET_VERSION);
1384 if (sra == NULL || strcmp(sra->text_version, content->text_version) != 0)
1385 if (sysfs_set_array(content, md_get_version(mdfd)) != 0) {
1386 close(mdfd);
1387 return 1;
1388 }
1389 if (sra)
1390 sysfs_free(sra);
1391
1392 for (dev = content->devs; dev; dev = dev->next)
1393 if (sysfs_add_disk(content, dev, 1) == 0)
1394 working++;
1395 else if (errno == EEXIST)
1396 preexist++;
1397 if (working == 0) {
1398 close(mdfd);
1399 return 1;/* Nothing new, don't try to start */
1400 }
1401
1402 map_update(&map, fd2devnum(mdfd),
1403 content->text_version,
1404 content->uuid, chosen_name);
1405
1406 if (runstop > 0 ||
1407 (working + preexist) >= content->array.working_disks) {
1408 int err;
1409
1410 switch(content->array.level) {
1411 case LEVEL_LINEAR:
1412 case LEVEL_MULTIPATH:
1413 case 0:
1414 err = sysfs_set_str(content, NULL, "array_state",
1415 "active");
1416 break;
1417 default:
1418 err = sysfs_set_str(content, NULL, "array_state",
1419 "readonly");
1420 /* start mdmon if needed. */
1421 if (!err) {
1422 if (!mdmon_running(st->container_dev))
1423 start_mdmon(st->container_dev);
1424 ping_monitor(devnum2devname(st->container_dev));
1425 }
1426 break;
1427 }
1428 if (!err)
1429 sysfs_set_safemode(content, content->safe_mode_delay);
1430 if (verbose >= 0) {
1431 if (err)
1432 fprintf(stderr, Name
1433 ": array %s now has %d devices",
1434 chosen_name, working + preexist);
1435 else
1436 fprintf(stderr, Name
1437 ": Started %s with %d devices",
1438 chosen_name, working + preexist);
1439 if (preexist)
1440 fprintf(stderr, " (%d new)", working);
1441 fprintf(stderr, "\n");
1442 }
1443 if (!err)
1444 wait_for(chosen_name, mdfd);
1445 close(mdfd);
1446 return 0;
1447 /* FIXME should have an O_EXCL and wait for read-auto */
1448 } else {
1449 if (verbose >= 0)
1450 fprintf(stderr, Name
1451 ": %s assembled with %d devices but "
1452 "not started\n",
1453 chosen_name, working);
1454 close(mdfd);
1455 return 1;
1456 }
1457 }
1458 #endif
1459
Unnamed repository; edit this file 'description' to name the repository.