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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 content = tst->ss->container_content(tst, NULL);
410 next_member:
411
412 if (!content)
413 goto loop; /* empty container */
414
415 if (content->next == NULL)
416 tmpdev->used = 2;
417
418 if (!ident_matches(ident, content, tst,
419 homehost, update,
420 report_missmatch ? devname : NULL)) {
421 content = content->next;
422 goto next_member;
423 } else if (is_member_busy(content->text_version)) {
424 if (report_missmatch)
425 fprintf(stderr, Name ": member %s in %s is already assembled\n",
426 content->text_version,
427 devname);
428
429 content = content->next;
430 goto next_member;
431 }
432 st = tst; tst = NULL;
433 if (!auto_assem && inargv && tmpdev->next != NULL) {
434 fprintf(stderr, Name ": %s is a container, but is not "
435 "only device given: confused and aborting\n",
436 devname);
437 st->ss->free_super(st);
438 dev_policy_free(pol);
439 return 1;
440 }
441 if (verbose > 0)
442 fprintf(stderr, Name ": found match on member %s in %s\n",
443 content->text_version, devname);
444 break;
445 }
446
447 if (!ident_matches(ident, content, tst,
448 homehost, update,
449 report_missmatch ? devname : NULL))
450 goto loop;
451
452 if (st == NULL)
453 st = dup_super(tst);
454 if (st->minor_version == -1)
455 st->minor_version = tst->minor_version;
456 if (st->ss != tst->ss ||
457 st->minor_version != tst->minor_version ||
458 st->ss->compare_super(st, tst) != 0) {
459 /* Some mismatch. If exactly one array matches this host,
460 * we can resolve on that one.
461 * Or, if we are auto assembling, we just ignore the second
462 * for now.
463 */
464 if (auto_assem)
465 goto loop;
466 if (homehost) {
467 int first = st->ss->match_home(st, homehost);
468 int last = tst->ss->match_home(tst, homehost);
469 if (first != last &&
470 (first == 1 || last == 1)) {
471 /* We can do something */
472 if (first) {/* just ignore this one */
473 if (report_missmatch)
474 fprintf(stderr, Name ": %s misses out due to wrong homehost\n",
475 devname);
476 goto loop;
477 } else { /* reject all those sofar */
478 struct mddev_dev *td;
479 if (report_missmatch)
480 fprintf(stderr, Name ": %s overrides previous devices due to good homehost\n",
481 devname);
482 for (td=devlist; td != tmpdev; td=td->next)
483 if (td->used == 1)
484 td->used = 0;
485 tmpdev->used = 1;
486 goto loop;
487 }
488 }
489 }
490 fprintf(stderr, Name ": superblock on %s doesn't match others - assembly aborted\n",
491 devname);
492 tst->ss->free_super(tst);
493 st->ss->free_super(st);
494 dev_policy_free(pol);
495 return 1;
496 }
497
498 tmpdev->used = 1;
499
500 loop:
501 dev_policy_free(pol);
502 pol = NULL;
503 if (tst)
504 tst->ss->free_super(tst);
505 }
506
507 if (!st || !st->sb || !content)
508 return 2;
509
510 /* Now need to open the array device. Use create_mddev */
511 if (content == &info)
512 st->ss->getinfo_super(st, content, NULL);
513
514 trustworthy = FOREIGN;
515 name = content->name;
516 switch (st->ss->match_home(st, homehost)
517 ?: st->ss->match_home(st, "any")) {
518 case 1:
519 trustworthy = LOCAL;
520 name = strchr(content->name, ':');
521 if (name)
522 name++;
523 else
524 name = content->name;
525 break;
526 }
527 if (!auto_assem)
528 /* If the array is listed in mdadm.conf or on
529 * command line, then we trust the name
530 * even if the array doesn't look local
531 */
532 trustworthy = LOCAL;
533
534 if (name[0] == 0 &&
535 content->array.level == LEVEL_CONTAINER) {
536 name = content->text_version;
537 trustworthy = METADATA;
538 }
539
540 if (name[0] && trustworthy != LOCAL &&
541 ! require_homehost &&
542 conf_name_is_free(name))
543 trustworthy = LOCAL;
544
545 if (trustworthy == LOCAL &&
546 strchr(name, ':'))
547 /* Ignore 'host:' prefix of name */
548 name = strchr(name, ':')+1;
549
550 mdfd = create_mddev(mddev, name, ident->autof, trustworthy,
551 chosen_name);
552 if (mdfd < 0) {
553 st->ss->free_super(st);
554 if (auto_assem)
555 goto try_again;
556 return 1;
557 }
558 mddev = chosen_name;
559 vers = md_get_version(mdfd);
560 if (vers < 9000) {
561 fprintf(stderr, Name ": Assemble requires driver version 0.90.0 or later.\n"
562 " Upgrade your kernel or try --build\n");
563 close(mdfd);
564 return 1;
565 }
566 if (mddev_busy(fd2devnum(mdfd))) {
567 fprintf(stderr, Name ": %s already active, cannot restart it!\n",
568 mddev);
569 for (tmpdev = devlist ;
570 tmpdev && tmpdev->used != 1;
571 tmpdev = tmpdev->next)
572 ;
573 if (tmpdev && auto_assem)
574 fprintf(stderr, Name ": %s needed for %s...\n",
575 mddev, tmpdev->devname);
576 close(mdfd);
577 mdfd = -3;
578 st->ss->free_super(st);
579 if (auto_assem)
580 goto try_again;
581 return 1;
582 }
583 ioctl(mdfd, STOP_ARRAY, NULL); /* just incase it was started but has no content */
584
585 #ifndef MDASSEMBLE
586 if (content != &info) {
587 /* This is a member of a container. Try starting the array. */
588 return assemble_container_content(st, mdfd, content, runstop,
589 chosen_name, verbose);
590 }
591 #endif
592 /* Ok, no bad inconsistancy, we can try updating etc */
593 bitmap_done = 0;
594 content->update_private = NULL;
595 devices = malloc(num_devs * sizeof(*devices));
596 devmap = calloc(num_devs * content->array.raid_disks, 1);
597 for (tmpdev = devlist; tmpdev; tmpdev=tmpdev->next) if (tmpdev->used == 1) {
598 char *devname = tmpdev->devname;
599 struct stat stb;
600 /* looks like a good enough match to update the super block if needed */
601 #ifndef MDASSEMBLE
602 if (update) {
603 int dfd;
604 /* prepare useful information in info structures */
605 struct stat stb2;
606 struct supertype *tst;
607 int err;
608 fstat(mdfd, &stb2);
609
610 if (strcmp(update, "uuid")==0 &&
611 !ident->uuid_set) {
612 int rfd;
613 if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
614 read(rfd, ident->uuid, 16) != 16) {
615 *(__u32*)(ident->uuid) = random();
616 *(__u32*)(ident->uuid+1) = random();
617 *(__u32*)(ident->uuid+2) = random();
618 *(__u32*)(ident->uuid+3) = random();
619 }
620 if (rfd >= 0) close(rfd);
621 }
622 dfd = dev_open(devname, O_RDWR|O_EXCL);
623
624 remove_partitions(dfd);
625
626 tst = dup_super(st);
627 if (dfd < 0 || tst->ss->load_super(tst, dfd, NULL) != 0) {
628 fprintf(stderr, Name ": cannot re-read metadata from %s - aborting\n",
629 devname);
630 if (dfd >= 0)
631 close(dfd);
632 close(mdfd);
633 free(devices);
634 free(devmap);
635 return 1;
636 }
637 tst->ss->getinfo_super(tst, content, devmap + devcnt * content->array.raid_disks);
638
639 memcpy(content->uuid, ident->uuid, 16);
640 strcpy(content->name, ident->name);
641 content->array.md_minor = minor(stb2.st_rdev);
642
643 if (strcmp(update, "byteorder") == 0)
644 err = 0;
645 else
646 err = tst->ss->update_super(tst, content, update,
647 devname, verbose,
648 ident->uuid_set,
649 homehost);
650 if (err < 0) {
651 fprintf(stderr,
652 Name ": --update=%s not understood"
653 " for %s metadata\n",
654 update, tst->ss->name);
655 tst->ss->free_super(tst);
656 free(tst);
657 close(mdfd);
658 close(dfd);
659 free(devices);
660 free(devmap);
661 return 1;
662 }
663 if (strcmp(update, "uuid")==0 &&
664 !ident->uuid_set) {
665 ident->uuid_set = 1;
666 memcpy(ident->uuid, content->uuid, 16);
667 }
668 if (tst->ss->store_super(tst, dfd))
669 fprintf(stderr, Name ": Could not re-write superblock on %s.\n",
670 devname);
671 close(dfd);
672
673 if (strcmp(update, "uuid")==0 &&
674 ident->bitmap_fd >= 0 && !bitmap_done) {
675 if (bitmap_update_uuid(ident->bitmap_fd,
676 content->uuid,
677 tst->ss->swapuuid) != 0)
678 fprintf(stderr, Name ": Could not update uuid on external bitmap.\n");
679 else
680 bitmap_done = 1;
681 }
682 tst->ss->free_super(tst);
683 } else
684 #endif
685 {
686 struct supertype *tst = dup_super(st);
687 int dfd;
688 dfd = dev_open(devname, O_RDWR|O_EXCL);
689
690 remove_partitions(dfd);
691
692 if (dfd < 0 || tst->ss->load_super(tst, dfd, NULL) != 0) {
693 fprintf(stderr, Name ": cannot re-read metadata from %s - aborting\n",
694 devname);
695 if (dfd >= 0)
696 close(dfd);
697 close(mdfd);
698 free(devices);
699 free(devmap);
700 return 1;
701 }
702 tst->ss->getinfo_super(tst, content, devmap + devcnt * content->array.raid_disks);
703 tst->ss->free_super(tst);
704 close(dfd);
705 }
706
707 stat(devname, &stb);
708
709 if (verbose > 0)
710 fprintf(stderr, Name ": %s is identified as a member of %s, slot %d.\n",
711 devname, mddev, content->disk.raid_disk);
712 devices[devcnt].devname = devname;
713 devices[devcnt].uptodate = 0;
714 devices[devcnt].i = *content;
715 devices[devcnt].i.disk.major = major(stb.st_rdev);
716 devices[devcnt].i.disk.minor = minor(stb.st_rdev);
717 if (most_recent < devcnt) {
718 if (devices[devcnt].i.events
719 > devices[most_recent].i.events)
720 most_recent = devcnt;
721 }
722 if (content->array.level == LEVEL_MULTIPATH)
723 /* with multipath, the raid_disk from the superblock is meaningless */
724 i = devcnt;
725 else
726 i = devices[devcnt].i.disk.raid_disk;
727 if (i+1 == 0) {
728 if (nextspare < content->array.raid_disks)
729 nextspare = content->array.raid_disks;
730 i = nextspare++;
731 } else {
732 if (i >= content->array.raid_disks &&
733 i >= nextspare)
734 nextspare = i+1;
735 }
736 if (i < 10000) {
737 if (i >= bestcnt) {
738 int newbestcnt = i+10;
739 int *newbest = malloc(sizeof(int)*newbestcnt);
740 int c;
741 for (c=0; c < newbestcnt; c++)
742 if (c < bestcnt)
743 newbest[c] = best[c];
744 else
745 newbest[c] = -1;
746 if (best)free(best);
747 best = newbest;
748 bestcnt = newbestcnt;
749 }
750 if (best[i] >=0 &&
751 devices[best[i]].i.events
752 == devices[devcnt].i.events
753 && (devices[best[i]].i.disk.minor
754 != devices[devcnt].i.disk.minor)
755 && st->ss == &super0
756 && content->array.level != LEVEL_MULTIPATH) {
757 /* two different devices with identical superblock.
758 * Could be a mis-detection caused by overlapping
759 * partitions. fail-safe.
760 */
761 fprintf(stderr, Name ": WARNING %s and %s appear"
762 " to have very similar superblocks.\n"
763 " If they are really different, "
764 "please --zero the superblock on one\n"
765 " If they are the same or overlap,"
766 " please remove one from %s.\n",
767 devices[best[i]].devname, devname,
768 inargv ? "the list" :
769 "the\n DEVICE list in mdadm.conf"
770 );
771 close(mdfd);
772 free(devices);
773 free(devmap);
774 return 1;
775 }
776 if (best[i] == -1
777 || (devices[best[i]].i.events
778 < devices[devcnt].i.events))
779 best[i] = devcnt;
780 }
781 devcnt++;
782 }
783 free(content->update_private);
784 content->update_private = NULL;
785
786 if (devcnt == 0) {
787 fprintf(stderr, Name ": no devices found for %s\n",
788 mddev);
789 if (st)
790 st->ss->free_super(st);
791 close(mdfd);
792 free(devices);
793 free(devmap);
794 return 1;
795 }
796
797 if (update && strcmp(update, "byteorder")==0)
798 st->minor_version = 90;
799
800 st->ss->getinfo_super(st, content, NULL);
801 clean = content->array.state & 1;
802
803 /* now we have some devices that might be suitable.
804 * I wonder how many
805 */
806 avail = malloc(content->array.raid_disks);
807 memset(avail, 0, content->array.raid_disks);
808 okcnt = 0;
809 sparecnt=0;
810 rebuilding_cnt=0;
811 for (i=0; i< bestcnt; i++) {
812 int j = best[i];
813 int event_margin = 1; /* always allow a difference of '1'
814 * like the kernel does
815 */
816 if (j < 0) continue;
817 /* note: we ignore error flags in multipath arrays
818 * as they don't make sense
819 */
820 if (content->array.level != LEVEL_MULTIPATH)
821 if (!(devices[j].i.disk.state & (1<<MD_DISK_ACTIVE))) {
822 if (!(devices[j].i.disk.state
823 & (1<<MD_DISK_FAULTY)))
824 sparecnt++;
825 continue;
826 }
827 /* If this devices thinks that 'most_recent' has failed, then
828 * we must reject this device.
829 */
830 if (j != most_recent &&
831 content->array.raid_disks > 0 &&
832 devices[most_recent].i.disk.raid_disk >= 0 &&
833 devmap[j * content->array.raid_disks + devices[most_recent].i.disk.raid_disk] == 0) {
834 if (verbose > -1)
835 fprintf(stderr, Name ": ignoring %s as it reports %s as failed\n",
836 devices[j].devname, devices[most_recent].devname);
837 best[i] = -1;
838 continue;
839 }
840 if (devices[j].i.events+event_margin >=
841 devices[most_recent].i.events) {
842 devices[j].uptodate = 1;
843 if (i < content->array.raid_disks) {
844 if (devices[j].i.recovery_start == MaxSector) {
845 okcnt++;
846 avail[i]=1;
847 } else
848 rebuilding_cnt++;
849 } else
850 sparecnt++;
851 }
852 }
853 free(devmap);
854 while (force && !enough(content->array.level, content->array.raid_disks,
855 content->array.layout, 1,
856 avail, okcnt)) {
857 /* Choose the newest best drive which is
858 * not up-to-date, update the superblock
859 * and add it.
860 */
861 int fd;
862 struct supertype *tst;
863 unsigned long long current_events;
864 chosen_drive = -1;
865 for (i = 0; i < content->array.raid_disks && i < bestcnt; i++) {
866 int j = best[i];
867 if (j>=0 &&
868 !devices[j].uptodate &&
869 devices[j].i.recovery_start == MaxSector &&
870 (chosen_drive < 0 ||
871 devices[j].i.events
872 > devices[chosen_drive].i.events))
873 chosen_drive = j;
874 }
875 if (chosen_drive < 0)
876 break;
877 current_events = devices[chosen_drive].i.events;
878 add_another:
879 if (verbose >= 0)
880 fprintf(stderr, Name ": forcing event count in %s(%d) from %d upto %d\n",
881 devices[chosen_drive].devname,
882 devices[chosen_drive].i.disk.raid_disk,
883 (int)(devices[chosen_drive].i.events),
884 (int)(devices[most_recent].i.events));
885 fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL);
886 if (fd < 0) {
887 fprintf(stderr, Name ": Couldn't open %s for write - not updating\n",
888 devices[chosen_drive].devname);
889 devices[chosen_drive].i.events = 0;
890 continue;
891 }
892 tst = dup_super(st);
893 if (tst->ss->load_super(tst,fd, NULL)) {
894 close(fd);
895 fprintf(stderr, Name ": RAID superblock disappeared from %s - not updating.\n",
896 devices[chosen_drive].devname);
897 devices[chosen_drive].i.events = 0;
898 continue;
899 }
900 content->events = devices[most_recent].i.events;
901 tst->ss->update_super(tst, content, "force-one",
902 devices[chosen_drive].devname, verbose,
903 0, NULL);
904
905 if (tst->ss->store_super(tst, fd)) {
906 close(fd);
907 fprintf(stderr, Name ": Could not re-write superblock on %s\n",
908 devices[chosen_drive].devname);
909 devices[chosen_drive].i.events = 0;
910 tst->ss->free_super(tst);
911 continue;
912 }
913 close(fd);
914 devices[chosen_drive].i.events = devices[most_recent].i.events;
915 devices[chosen_drive].uptodate = 1;
916 avail[chosen_drive] = 1;
917 okcnt++;
918 tst->ss->free_super(tst);
919
920 /* If there are any other drives of the same vintage,
921 * add them in as well. We can't lose and we might gain
922 */
923 for (i = 0; i < content->array.raid_disks && i < bestcnt ; i++) {
924 int j = best[i];
925 if (j >= 0 &&
926 !devices[j].uptodate &&
927 devices[j].i.events == current_events) {
928 chosen_drive = j;
929 goto add_another;
930 }
931 }
932 }
933
934 /* Now we want to look at the superblock which the kernel will base things on
935 * and compare the devices that we think are working with the devices that the
936 * superblock thinks are working.
937 * If there are differences and --force is given, then update this chosen
938 * superblock.
939 */
940 chosen_drive = -1;
941 st->ss->free_super(st);
942 for (i=0; chosen_drive < 0 && i<bestcnt; i++) {
943 int j = best[i];
944 int fd;
945
946 if (j<0)
947 continue;
948 if (!devices[j].uptodate)
949 continue;
950 chosen_drive = j;
951 if ((fd=dev_open(devices[j].devname, O_RDONLY|O_EXCL))< 0) {
952 fprintf(stderr, Name ": Cannot open %s: %s\n",
953 devices[j].devname, strerror(errno));
954 close(mdfd);
955 free(devices);
956 return 1;
957 }
958 if (st->ss->load_super(st,fd, NULL)) {
959 close(fd);
960 fprintf(stderr, Name ": RAID superblock has disappeared from %s\n",
961 devices[j].devname);
962 close(mdfd);
963 free(devices);
964 return 1;
965 }
966 close(fd);
967 }
968 if (st->sb == NULL) {
969 fprintf(stderr, Name ": No suitable drives found for %s\n", mddev);
970 close(mdfd);
971 free(devices);
972 return 1;
973 }
974 st->ss->getinfo_super(st, content, NULL);
975 #ifndef MDASSEMBLE
976 sysfs_init(content, mdfd, 0);
977 #endif
978 for (i=0; i<bestcnt; i++) {
979 int j = best[i];
980 unsigned int desired_state;
981
982 if (i < content->array.raid_disks)
983 desired_state = (1<<MD_DISK_ACTIVE) | (1<<MD_DISK_SYNC);
984 else
985 desired_state = 0;
986
987 if (j<0)
988 continue;
989 if (!devices[j].uptodate)
990 continue;
991
992 devices[j].i.disk.state = desired_state;
993 if (!(devices[j].i.array.state & 1))
994 clean = 0;
995
996 if (st->ss->update_super(st, &devices[j].i, "assemble", NULL,
997 verbose, 0, NULL)) {
998 if (force) {
999 if (verbose >= 0)
1000 fprintf(stderr, Name ": "
1001 "clearing FAULTY flag for device %d in %s for %s\n",
1002 j, mddev, devices[j].devname);
1003 change = 1;
1004 } else {
1005 if (verbose >= -1)
1006 fprintf(stderr, Name ": "
1007 "device %d in %s has wrong state in superblock, but %s seems ok\n",
1008 i, mddev, devices[j].devname);
1009 }
1010 }
1011 #if 0
1012 if (!(super.disks[i].i.disk.state & (1 << MD_DISK_FAULTY))) {
1013 fprintf(stderr, Name ": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n",
1014 i, mddev);
1015 }
1016 #endif
1017 }
1018 if (force && !clean &&
1019 !enough(content->array.level, content->array.raid_disks,
1020 content->array.layout, clean,
1021 avail, okcnt)) {
1022 change += st->ss->update_super(st, content, "force-array",
1023 devices[chosen_drive].devname, verbose,
1024 0, NULL);
1025 clean = 1;
1026 }
1027
1028 if (change) {
1029 int fd;
1030 fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL);
1031 if (fd < 0) {
1032 fprintf(stderr, Name ": Could not open %s for write - cannot Assemble array.\n",
1033 devices[chosen_drive].devname);
1034 close(mdfd);
1035 free(devices);
1036 return 1;
1037 }
1038 if (st->ss->store_super(st, fd)) {
1039 close(fd);
1040 fprintf(stderr, Name ": Could not re-write superblock on %s\n",
1041 devices[chosen_drive].devname);
1042 close(mdfd);
1043 free(devices);
1044 return 1;
1045 }
1046 close(fd);
1047 }
1048
1049 /* If we are in the middle of a reshape we may need to restore saved data
1050 * that was moved aside due to the reshape overwriting live data
1051 * The code of doing this lives in Grow.c
1052 */
1053 #ifndef MDASSEMBLE
1054 if (content->reshape_active) {
1055 int err = 0;
1056 int *fdlist = malloc(sizeof(int)* bestcnt);
1057 if (verbose > 0)
1058 fprintf(stderr, Name ":%s has an active reshape - checking "
1059 "if critical section needs to be restored\n",
1060 chosen_name);
1061 for (i=0; i<bestcnt; i++) {
1062 int j = best[i];
1063 if (j >= 0) {
1064 fdlist[i] = dev_open(devices[j].devname, O_RDWR|O_EXCL);
1065 if (fdlist[i] < 0) {
1066 fprintf(stderr, Name ": Could not open %s for write - cannot Assemble array.\n",
1067 devices[j].devname);
1068 err = 1;
1069 break;
1070 }
1071 } else
1072 fdlist[i] = -1;
1073 }
1074 if (!err)
1075 err = Grow_restart(st, content, fdlist, bestcnt, backup_file, verbose > 0);
1076 while (i>0) {
1077 i--;
1078 if (fdlist[i]>=0) close(fdlist[i]);
1079 }
1080 if (err) {
1081 fprintf(stderr, Name ": Failed to restore critical section for reshape, sorry.\n");
1082 if (backup_file == NULL)
1083 fprintf(stderr," Possibly you needed to specify the --backup-file\n");
1084 close(mdfd);
1085 free(devices);
1086 return err;
1087 }
1088 }
1089 #endif
1090 /* count number of in-sync devices according to the superblock.
1091 * We must have this number to start the array without -s or -R
1092 */
1093 req_cnt = content->array.working_disks;
1094
1095 /* Almost ready to actually *do* something */
1096 if (!old_linux) {
1097 int rv;
1098
1099 /* First, fill in the map, so that udev can find our name
1100 * as soon as we become active.
1101 */
1102 map_update(NULL, fd2devnum(mdfd), content->text_version,
1103 content->uuid, chosen_name);
1104
1105 rv = set_array_info(mdfd, st, content);
1106 if (rv) {
1107 fprintf(stderr, Name ": failed to set array info for %s: %s\n",
1108 mddev, strerror(errno));
1109 ioctl(mdfd, STOP_ARRAY, NULL);
1110 close(mdfd);
1111 free(devices);
1112 return 1;
1113 }
1114 if (ident->bitmap_fd >= 0) {
1115 if (ioctl(mdfd, SET_BITMAP_FILE, ident->bitmap_fd) != 0) {
1116 fprintf(stderr, Name ": SET_BITMAP_FILE failed.\n");
1117 ioctl(mdfd, STOP_ARRAY, NULL);
1118 close(mdfd);
1119 free(devices);
1120 return 1;
1121 }
1122 } else if (ident->bitmap_file) {
1123 /* From config file */
1124 int bmfd = open(ident->bitmap_file, O_RDWR);
1125 if (bmfd < 0) {
1126 fprintf(stderr, Name ": Could not open bitmap file %s\n",
1127 ident->bitmap_file);
1128 ioctl(mdfd, STOP_ARRAY, NULL);
1129 close(mdfd);
1130 free(devices);
1131 return 1;
1132 }
1133 if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) {
1134 fprintf(stderr, Name ": Failed to set bitmapfile for %s\n", mddev);
1135 close(bmfd);
1136 ioctl(mdfd, STOP_ARRAY, NULL);
1137 close(mdfd);
1138 free(devices);
1139 return 1;
1140 }
1141 close(bmfd);
1142 }
1143
1144 /* First, add the raid disks, but add the chosen one last */
1145 for (i=0; i<= bestcnt; i++) {
1146 int j;
1147 if (i < bestcnt) {
1148 j = best[i];
1149 if (j == chosen_drive)
1150 continue;
1151 } else
1152 j = chosen_drive;
1153
1154 if (j >= 0 /* && devices[j].uptodate */) {
1155 rv = add_disk(mdfd, st, content, &devices[j].i);
1156
1157 if (rv) {
1158 fprintf(stderr, Name ": failed to add "
1159 "%s to %s: %s\n",
1160 devices[j].devname,
1161 mddev,
1162 strerror(errno));
1163 if (i < content->array.raid_disks
1164 || i == bestcnt)
1165 okcnt--;
1166 else
1167 sparecnt--;
1168 } else if (verbose > 0)
1169 fprintf(stderr, Name ": added %s "
1170 "to %s as %d\n",
1171 devices[j].devname, mddev,
1172 devices[j].i.disk.raid_disk);
1173 } else if (verbose > 0 && i < content->array.raid_disks)
1174 fprintf(stderr, Name ": no uptodate device for "
1175 "slot %d of %s\n",
1176 i, mddev);
1177 }
1178
1179 if (content->array.level == LEVEL_CONTAINER) {
1180 if (verbose >= 0) {
1181 fprintf(stderr, Name ": Container %s has been "
1182 "assembled with %d drive%s",
1183 mddev, okcnt+sparecnt, okcnt+sparecnt==1?"":"s");
1184 if (okcnt < (unsigned)content->array.raid_disks)
1185 fprintf(stderr, " (out of %d)",
1186 content->array.raid_disks);
1187 fprintf(stderr, "\n");
1188 }
1189 sysfs_uevent(content, "change");
1190 wait_for(chosen_name, mdfd);
1191 close(mdfd);
1192 free(devices);
1193 return 0;
1194 }
1195
1196 if (runstop == 1 ||
1197 (runstop <= 0 &&
1198 ( enough(content->array.level, content->array.raid_disks,
1199 content->array.layout, clean, avail, okcnt) &&
1200 (okcnt + rebuilding_cnt >= req_cnt || start_partial_ok)
1201 ))) {
1202 /* This array is good-to-go.
1203 * If a reshape is in progress then we might need to
1204 * continue monitoring it. In that case we start
1205 * it read-only and let the grow code make it writable.
1206 */
1207 int rv;
1208 #ifndef MDASSEMBLE
1209 if (content->reshape_active &&
1210 content->delta_disks <= 0)
1211 rv = Grow_continue(mdfd, st, content, backup_file);
1212 else
1213 #endif
1214 rv = ioctl(mdfd, RUN_ARRAY, NULL);
1215 if (rv == 0) {
1216 if (verbose >= 0) {
1217 fprintf(stderr, Name ": %s has been started with %d drive%s",
1218 mddev, okcnt, okcnt==1?"":"s");
1219 if (okcnt < (unsigned)content->array.raid_disks)
1220 fprintf(stderr, " (out of %d)", content->array.raid_disks);
1221 if (rebuilding_cnt)
1222 fprintf(stderr, "%s %d rebuilding", sparecnt?",":" and", rebuilding_cnt);
1223 if (sparecnt)
1224 fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s");
1225 fprintf(stderr, ".\n");
1226 }
1227 if (content->reshape_active &&
1228 content->array.level >= 4 &&
1229 content->array.level <= 6) {
1230 /* might need to increase the size
1231 * of the stripe cache - default is 256
1232 */
1233 if (256 < 4 * (content->array.chunk_size/4096)) {
1234 struct mdinfo *sra = sysfs_read(mdfd, 0, 0);
1235 if (sra)
1236 sysfs_set_num(sra, NULL,
1237 "stripe_cache_size",
1238 (4 * content->array.chunk_size / 4096) + 1);
1239 }
1240 }
1241 if (okcnt < (unsigned)content->array.raid_disks) {
1242 /* If any devices did not get added
1243 * because the kernel rejected them based
1244 * on event count, try adding them
1245 * again providing the action policy is
1246 * 're-add' or greater. The bitmap
1247 * might allow them to be included, or
1248 * they will become spares.
1249 */
1250 for (i = 0; i <= bestcnt; i++) {
1251 int j = best[i];
1252 if (j >= 0 && !devices[j].uptodate) {
1253 if (!disk_action_allows(&devices[j].i, st->ss->name, act_re_add))
1254 continue;
1255 rv = add_disk(mdfd, st, content,
1256 &devices[j].i);
1257 if (rv == 0 && verbose >= 0)
1258 fprintf(stderr,
1259 Name ": %s has been re-added.\n",
1260 devices[j].devname);
1261 }
1262 }
1263 }
1264 wait_for(mddev, mdfd);
1265 close(mdfd);
1266 if (auto_assem) {
1267 int usecs = 1;
1268 /* There is a nasty race with 'mdadm --monitor'.
1269 * If it opens this device before we close it,
1270 * it gets an incomplete open on which IO
1271 * doesn't work and the capacity is
1272 * wrong.
1273 * If we reopen (to check for layered devices)
1274 * before --monitor closes, we loose.
1275 *
1276 * So: wait upto 1 second for there to be
1277 * a non-zero capacity.
1278 */
1279 while (usecs < 1000) {
1280 mdfd = open(mddev, O_RDONLY);
1281 if (mdfd >= 0) {
1282 unsigned long long size;
1283 if (get_dev_size(mdfd, NULL, &size) &&
1284 size > 0)
1285 break;
1286 close(mdfd);
1287 }
1288 usleep(usecs);
1289 usecs <<= 1;
1290 }
1291 }
1292 free(devices);
1293 return 0;
1294 }
1295 fprintf(stderr, Name ": failed to RUN_ARRAY %s: %s\n",
1296 mddev, strerror(errno));
1297
1298 if (!enough(content->array.level, content->array.raid_disks,
1299 content->array.layout, 1, avail, okcnt))
1300 fprintf(stderr, Name ": Not enough devices to "
1301 "start the array.\n");
1302 else if (!enough(content->array.level,
1303 content->array.raid_disks,
1304 content->array.layout, clean,
1305 avail, okcnt))
1306 fprintf(stderr, Name ": Not enough devices to "
1307 "start the array while not clean "
1308 "- consider --force.\n");
1309
1310 if (auto_assem)
1311 ioctl(mdfd, STOP_ARRAY, NULL);
1312 close(mdfd);
1313 free(devices);
1314 return 1;
1315 }
1316 if (runstop == -1) {
1317 fprintf(stderr, Name ": %s assembled from %d drive%s",
1318 mddev, okcnt, okcnt==1?"":"s");
1319 if (okcnt != (unsigned)content->array.raid_disks)
1320 fprintf(stderr, " (out of %d)", content->array.raid_disks);
1321 fprintf(stderr, ", but not started.\n");
1322 close(mdfd);
1323 free(devices);
1324 return 0;
1325 }
1326 if (verbose >= -1) {
1327 fprintf(stderr, Name ": %s assembled from %d drive%s", mddev, okcnt, okcnt==1?"":"s");
1328 if (rebuilding_cnt)
1329 fprintf(stderr, "%s %d rebuilding", sparecnt?", ":" and ", rebuilding_cnt);
1330 if (sparecnt)
1331 fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s");
1332 if (!enough(content->array.level, content->array.raid_disks,
1333 content->array.layout, 1, avail, okcnt))
1334 fprintf(stderr, " - not enough to start the array.\n");
1335 else if (!enough(content->array.level,
1336 content->array.raid_disks,
1337 content->array.layout, clean,
1338 avail, okcnt))
1339 fprintf(stderr, " - not enough to start the "
1340 "array while not clean - consider "
1341 "--force.\n");
1342 else {
1343 if (req_cnt == (unsigned)content->array.raid_disks)
1344 fprintf(stderr, " - need all %d to start it", req_cnt);
1345 else
1346 fprintf(stderr, " - need %d of %d to start", req_cnt, content->array.raid_disks);
1347 fprintf(stderr, " (use --run to insist).\n");
1348 }
1349 }
1350 if (auto_assem)
1351 ioctl(mdfd, STOP_ARRAY, NULL);
1352 close(mdfd);
1353 free(devices);
1354 return 1;
1355 } else {
1356 /* The "chosen_drive" is a good choice, and if necessary, the superblock has
1357 * been updated to point to the current locations of devices.
1358 * so we can just start the array
1359 */
1360 unsigned long dev;
1361 dev = makedev(devices[chosen_drive].i.disk.major,
1362 devices[chosen_drive].i.disk.minor);
1363 if (ioctl(mdfd, START_ARRAY, dev)) {
1364 fprintf(stderr, Name ": Cannot start array: %s\n",
1365 strerror(errno));
1366 }
1367
1368 }
1369 close(mdfd);
1370 free(devices);
1371 return 0;
1372 }
1373
1374 #ifndef MDASSEMBLE
1375 int assemble_container_content(struct supertype *st, int mdfd,
1376 struct mdinfo *content, int runstop,
1377 char *chosen_name, int verbose)
1378 {
1379 struct mdinfo *dev, *sra;
1380 int working = 0, preexist = 0;
1381 struct map_ent *map = NULL;
1382
1383 sysfs_init(content, mdfd, 0);
1384
1385 sra = sysfs_read(mdfd, 0, GET_VERSION);
1386 if (sra == NULL || strcmp(sra->text_version, content->text_version) != 0)
1387 if (sysfs_set_array(content, md_get_version(mdfd)) != 0) {
1388 close(mdfd);
1389 return 1;
1390 }
1391 if (sra)
1392 sysfs_free(sra);
1393
1394 for (dev = content->devs; dev; dev = dev->next)
1395 if (sysfs_add_disk(content, dev, 1) == 0)
1396 working++;
1397 else if (errno == EEXIST)
1398 preexist++;
1399 if (working == 0) {
1400 close(mdfd);
1401 return 1;/* Nothing new, don't try to start */
1402 }
1403
1404 map_update(&map, fd2devnum(mdfd),
1405 content->text_version,
1406 content->uuid, chosen_name);
1407
1408 if (runstop > 0 ||
1409 (working + preexist) >= content->array.working_disks) {
1410 int err;
1411
1412 switch(content->array.level) {
1413 case LEVEL_LINEAR:
1414 case LEVEL_MULTIPATH:
1415 case 0:
1416 err = sysfs_set_str(content, NULL, "array_state",
1417 "active");
1418 break;
1419 default:
1420 err = sysfs_set_str(content, NULL, "array_state",
1421 "readonly");
1422 /* start mdmon if needed. */
1423 if (!err) {
1424 if (!mdmon_running(st->container_dev))
1425 start_mdmon(st->container_dev);
1426 ping_monitor(devnum2devname(st->container_dev));
1427 }
1428 break;
1429 }
1430 if (!err)
1431 sysfs_set_safemode(content, content->safe_mode_delay);
1432 if (verbose >= 0) {
1433 if (err)
1434 fprintf(stderr, Name
1435 ": array %s now has %d devices",
1436 chosen_name, working + preexist);
1437 else
1438 fprintf(stderr, Name
1439 ": Started %s with %d devices",
1440 chosen_name, working + preexist);
1441 if (preexist)
1442 fprintf(stderr, " (%d new)", working);
1443 fprintf(stderr, "\n");
1444 }
1445 if (!err)
1446 wait_for(chosen_name, mdfd);
1447 close(mdfd);
1448 return 0;
1449 /* FIXME should have an O_EXCL and wait for read-auto */
1450 } else {
1451 if (verbose >= 0)
1452 fprintf(stderr, Name
1453 ": %s assembled with %d devices but "
1454 "not started\n",
1455 chosen_name, working);
1456 close(mdfd);
1457 return 1;
1458 }
1459 }
1460 #endif
1461
Unnamed repository; edit this file 'description' to name the repository.