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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,
137 char *backup_file, int invalid_backup,
138 int readonly, int runstop,
139 char *update, char *homehost, int require_homehost,
140 int verbose, int force)
141 {
142 /*
143 * The task of Assemble is to find a collection of
144 * devices that should (according to their superblocks)
145 * form an array, and to give this collection to the MD driver.
146 * In Linux-2.4 and later, this involves submitting a
147 * SET_ARRAY_INFO ioctl with no arg - to prepare
148 * the array - and then submit a number of
149 * ADD_NEW_DISK ioctls to add disks into
150 * the array. Finally RUN_ARRAY might
151 * be submitted to start the array.
152 *
153 * Much of the work of Assemble is in finding and/or
154 * checking the disks to make sure they look right.
155 *
156 * If mddev is not set, then scan must be set and we
157 * read through the config file for dev+uuid mapping
158 * We recurse, setting mddev, for each device that
159 * - isn't running
160 * - has a valid uuid (or any uuid if !uuidset)
161 *
162 * If mddev is set, we try to determine state of md.
163 * check version - must be at least 0.90.0
164 * check kernel version. must be at least 2.4.
165 * If not, we can possibly fall back on START_ARRAY
166 * Try to GET_ARRAY_INFO.
167 * If possible, give up
168 * If not, try to STOP_ARRAY just to make sure
169 *
170 * If !uuidset and scan, look in conf-file for uuid
171 * If not found, give up
172 * If !devlist and scan and uuidset, get list of devs from conf-file
173 *
174 * For each device:
175 * Check superblock - discard if bad
176 * Check uuid (set if we don't have one) - discard if no match
177 * Check superblock similarity if we have a superblock - discard if different
178 * Record events, devicenum
179 * This should give us a list of devices for the array
180 * We should collect the most recent event number
181 *
182 * Count disks with recent enough event count
183 * While force && !enough disks
184 * Choose newest rejected disks, update event count
185 * mark clean and rewrite superblock
186 * If recent kernel:
187 * SET_ARRAY_INFO
188 * foreach device with recent events : ADD_NEW_DISK
189 * if runstop == 1 || "enough" disks and runstop==0 -> RUN_ARRAY
190 * If old kernel:
191 * Check the device numbers in superblock are right
192 * update superblock if any changes
193 * START_ARRAY
194 *
195 */
196 int mdfd;
197 int clean;
198 int auto_assem = (mddev == NULL && !ident->uuid_set &&
199 ident->super_minor == UnSet && ident->name[0] == 0
200 && (ident->container == NULL || ident->member == NULL));
201 int old_linux = 0;
202 int vers = vers; /* Keep gcc quite - it really is initialised */
203 struct {
204 char *devname;
205 int uptodate; /* set once we decide that this device is as
206 * recent as everything else in the array.
207 */
208 struct mdinfo i;
209 } *devices;
210 char *devmap;
211 int *best = NULL; /* indexed by raid_disk */
212 int bestcnt = 0;
213 int devcnt = 0;
214 unsigned int okcnt, sparecnt, rebuilding_cnt;
215 unsigned int req_cnt;
216 int i;
217 int most_recent = 0;
218 int chosen_drive;
219 int change = 0;
220 int inargv = 0;
221 int report_missmatch;
222 int bitmap_done;
223 int start_partial_ok = (runstop >= 0) &&
224 (force || devlist==NULL || auto_assem);
225 unsigned int num_devs;
226 struct mddev_dev *tmpdev;
227 struct mdinfo info;
228 struct mdinfo *content = NULL;
229 char *avail;
230 int nextspare = 0;
231 char *name = NULL;
232 int trustworthy;
233 char chosen_name[1024];
234
235 if (get_linux_version() < 2004000)
236 old_linux = 1;
237
238 /*
239 * If any subdevs are listed, then any that don't
240 * match ident are discarded. Remainder must all match and
241 * become the array.
242 * If no subdevs, then we scan all devices in the config file, but
243 * there must be something in the identity
244 */
245
246 if (!devlist &&
247 ident->uuid_set == 0 &&
248 (ident->super_minor < 0 || ident->super_minor == UnSet) &&
249 ident->name[0] == 0 &&
250 (ident->container == NULL || ident->member == NULL) &&
251 ident->devices == NULL) {
252 fprintf(stderr, Name ": No identity information available for %s - cannot assemble.\n",
253 mddev ? mddev : "further assembly");
254 return 1;
255 }
256
257 if (devlist == NULL)
258 devlist = conf_get_devs();
259 else if (mddev)
260 inargv = 1;
261
262 report_missmatch = ((inargv && verbose >= 0) || verbose > 0);
263 try_again:
264 /* We come back here when doing auto-assembly and attempting some
265 * set of devices failed. Those are now marked as ->used==2 and
266 * we ignore them and try again
267 */
268
269 tmpdev = devlist; num_devs = 0;
270 while (tmpdev) {
271 if (tmpdev->used)
272 tmpdev->used = 2;
273 else
274 num_devs++;
275 tmpdev = tmpdev->next;
276 }
277
278 if (!st && ident->st) st = ident->st;
279
280 if (verbose>0)
281 fprintf(stderr, Name ": looking for devices for %s\n",
282 mddev ? mddev : "further assembly");
283
284 /* first walk the list of devices to find a consistent set
285 * that match the criterea, if that is possible.
286 * We flag the ones we like with 'used'.
287 */
288 for (tmpdev = devlist;
289 tmpdev;
290 tmpdev = tmpdev ? tmpdev->next : NULL) {
291 char *devname = tmpdev->devname;
292 int dfd;
293 struct stat stb;
294 struct supertype *tst = dup_super(st);
295 struct dev_policy *pol = NULL;
296 int found_container = 0;
297
298 if (tmpdev->used > 1) continue;
299
300 if (ident->devices &&
301 !match_oneof(ident->devices, devname)) {
302 if (report_missmatch)
303 fprintf(stderr, Name ": %s is not one of %s\n", devname, ident->devices);
304 continue;
305 }
306
307 dfd = dev_open(devname, O_RDONLY|O_EXCL);
308 if (dfd < 0) {
309 if (report_missmatch)
310 fprintf(stderr, Name ": cannot open device %s: %s\n",
311 devname, strerror(errno));
312 tmpdev->used = 2;
313 } else if (fstat(dfd, &stb)< 0) {
314 /* Impossible! */
315 fprintf(stderr, Name ": fstat failed for %s: %s\n",
316 devname, strerror(errno));
317 tmpdev->used = 2;
318 } else if ((stb.st_mode & S_IFMT) != S_IFBLK) {
319 fprintf(stderr, Name ": %s is not a block device.\n",
320 devname);
321 tmpdev->used = 2;
322 } else if (must_be_container(dfd)) {
323 if (st) {
324 /* already found some components, this cannot
325 * be another one.
326 */
327 if (report_missmatch)
328 fprintf(stderr, Name ": %s is a container, but we are looking for components\n",
329 devname);
330 tmpdev->used = 2;
331 } if (!tst && (tst = super_by_fd(dfd, NULL)) == NULL) {
332 if (report_missmatch)
333 fprintf(stderr, Name ": not a recognisable container: %s\n",
334 devname);
335 tmpdev->used = 2;
336 } else if (!tst->ss->load_container
337 || tst->ss->load_container(tst, dfd, NULL)) {
338 if (report_missmatch)
339 fprintf(stderr, Name ": no correct container type: %s\n",
340 devname);
341 tmpdev->used = 2;
342 } else if (auto_assem &&
343 !conf_test_metadata(tst->ss->name, (pol = devnum_policy(stb.st_rdev)),
344 tst->ss->match_home(tst, homehost) == 1)) {
345 if (report_missmatch)
346 fprintf(stderr, Name ": %s has metadata type %s for which "
347 "auto-assembly is disabled\n",
348 devname, tst->ss->name);
349 tmpdev->used = 2;
350 } else
351 found_container = 1;
352 } else {
353 if (!tst && (tst = guess_super(dfd)) == NULL) {
354 if (report_missmatch)
355 fprintf(stderr, Name ": no recogniseable superblock on %s\n",
356 devname);
357 tmpdev->used = 2;
358 } else if (tst->ss->load_super(tst,dfd, NULL)) {
359 if (report_missmatch)
360 fprintf(stderr, Name ": no RAID superblock on %s\n",
361 devname);
362 tmpdev->used = 2;
363 } else if (tst->ss->compare_super == NULL) {
364 if (report_missmatch)
365 fprintf(stderr, Name ": Cannot assemble %s metadata on %s\n",
366 tst->ss->name, devname);
367 tmpdev->used = 2;
368 } else if (auto_assem && st == NULL &&
369 !conf_test_metadata(tst->ss->name, (pol = devnum_policy(stb.st_rdev)),
370 tst->ss->match_home(tst, homehost) == 1)) {
371 if (report_missmatch)
372 fprintf(stderr, Name ": %s has metadata type %s for which "
373 "auto-assembly is disabled\n",
374 devname, tst->ss->name);
375 tmpdev->used = 2;
376 }
377 }
378 if (dfd >= 0) close(dfd);
379 if (tmpdev->used == 2) {
380 if (auto_assem)
381 /* Ignore unrecognised devices during auto-assembly */
382 goto loop;
383 if (ident->uuid_set || ident->name[0] ||
384 ident->super_minor != UnSet)
385 /* Ignore unrecognised device if looking for
386 * specific array */
387 goto loop;
388
389
390 fprintf(stderr, Name ": %s has no superblock - assembly aborted\n",
391 devname);
392 if (st)
393 st->ss->free_super(st);
394 dev_policy_free(pol);
395 return 1;
396 }
397
398 if (found_container) {
399 /* tmpdev is a container. We need to be either
400 * looking for a member, or auto-assembling
401 */
402
403 if (ident->container) {
404 if (ident->container[0] == '/' &&
405 !same_dev(ident->container, devname)) {
406 if (report_missmatch)
407 fprintf(stderr, Name ": %s is not the container required (%s)\n",
408 devname, ident->container);
409 goto loop;
410 }
411 if (ident->container[0] != '/') {
412 /* we have a uuid */
413 int uuid[4];
414
415 content = &info;
416 memset(content, 0, sizeof(*content));
417 tst->ss->getinfo_super(tst, content, NULL);
418
419 if (!parse_uuid(ident->container, uuid) ||
420 !same_uuid(content->uuid, uuid, tst->ss->swapuuid)) {
421 if (report_missmatch)
422 fprintf(stderr, Name ": %s has wrong UUID to be required container\n",
423 devname);
424 goto loop;
425 }
426 }
427 }
428 /* It is worth looking inside this container.
429 */
430 if (verbose > 0)
431 fprintf(stderr, Name ": looking in container %s\n",
432 devname);
433
434 for (content = tst->ss->container_content(tst, NULL);
435 content;
436 content = content->next) {
437
438 if (!ident_matches(ident, content, tst,
439 homehost, update,
440 report_missmatch ? devname : NULL))
441 /* message already printed */;
442 else if (is_member_busy(content->text_version)) {
443 if (report_missmatch)
444 fprintf(stderr, Name ": member %s in %s is already assembled\n",
445 content->text_version,
446 devname);
447 } else
448 break;
449 }
450 if (!content) {
451 tmpdev->used = 2;
452 goto loop; /* empty container */
453 }
454
455 st = tst; tst = NULL;
456 if (!auto_assem && inargv && tmpdev->next != NULL) {
457 fprintf(stderr, Name ": %s is a container, but is not "
458 "only device given: confused and aborting\n",
459 devname);
460 st->ss->free_super(st);
461 dev_policy_free(pol);
462 return 1;
463 }
464 if (verbose > 0)
465 fprintf(stderr, Name ": found match on member %s in %s\n",
466 content->text_version, devname);
467
468 /* make sure we finished the loop */
469 tmpdev = NULL;
470 goto loop;
471 } else {
472
473 content = &info;
474 memset(content, 0, sizeof(*content));
475 tst->ss->getinfo_super(tst, content, NULL);
476
477 if (!ident_matches(ident, content, tst,
478 homehost, update,
479 report_missmatch ? devname : NULL))
480 goto loop;
481
482 if (st == NULL)
483 st = dup_super(tst);
484 if (st->minor_version == -1)
485 st->minor_version = tst->minor_version;
486 if (st->ss != tst->ss ||
487 st->minor_version != tst->minor_version ||
488 st->ss->compare_super(st, tst) != 0) {
489 /* Some mismatch. If exactly one array matches this host,
490 * we can resolve on that one.
491 * Or, if we are auto assembling, we just ignore the second
492 * for now.
493 */
494 if (auto_assem)
495 goto loop;
496 if (homehost) {
497 int first = st->ss->match_home(st, homehost);
498 int last = tst->ss->match_home(tst, homehost);
499 if (first != last &&
500 (first == 1 || last == 1)) {
501 /* We can do something */
502 if (first) {/* just ignore this one */
503 if (report_missmatch)
504 fprintf(stderr, Name ": %s misses out due to wrong homehost\n",
505 devname);
506 goto loop;
507 } else { /* reject all those sofar */
508 struct mddev_dev *td;
509 if (report_missmatch)
510 fprintf(stderr, Name ": %s overrides previous devices due to good homehost\n",
511 devname);
512 for (td=devlist; td != tmpdev; td=td->next)
513 if (td->used == 1)
514 td->used = 0;
515 tmpdev->used = 1;
516 goto loop;
517 }
518 }
519 }
520 fprintf(stderr, Name ": superblock on %s doesn't match others - assembly aborted\n",
521 devname);
522 tst->ss->free_super(tst);
523 st->ss->free_super(st);
524 dev_policy_free(pol);
525 return 1;
526 }
527 tmpdev->used = 1;
528 }
529 loop:
530 dev_policy_free(pol);
531 pol = NULL;
532 if (tst)
533 tst->ss->free_super(tst);
534 }
535
536 if (!st || !st->sb || !content)
537 return 2;
538
539 /* Now need to open the array device. Use create_mddev */
540 if (content == &info)
541 st->ss->getinfo_super(st, content, NULL);
542
543 trustworthy = FOREIGN;
544 name = content->name;
545 switch (st->ss->match_home(st, homehost)
546 ?: st->ss->match_home(st, "any")) {
547 case 1:
548 trustworthy = LOCAL;
549 name = strchr(content->name, ':');
550 if (name)
551 name++;
552 else
553 name = content->name;
554 break;
555 }
556 if (!auto_assem)
557 /* If the array is listed in mdadm.conf or on
558 * command line, then we trust the name
559 * even if the array doesn't look local
560 */
561 trustworthy = LOCAL;
562
563 if (name[0] == 0 &&
564 content->array.level == LEVEL_CONTAINER) {
565 name = content->text_version;
566 trustworthy = METADATA;
567 }
568
569 if (name[0] && trustworthy != LOCAL &&
570 ! require_homehost &&
571 conf_name_is_free(name))
572 trustworthy = LOCAL;
573
574 if (trustworthy == LOCAL &&
575 strchr(name, ':'))
576 /* Ignore 'host:' prefix of name */
577 name = strchr(name, ':')+1;
578
579 mdfd = create_mddev(mddev, name, ident->autof, trustworthy,
580 chosen_name);
581 if (mdfd < 0) {
582 st->ss->free_super(st);
583 if (auto_assem)
584 goto try_again;
585 return 1;
586 }
587 mddev = chosen_name;
588 vers = md_get_version(mdfd);
589 if (vers < 9000) {
590 fprintf(stderr, Name ": Assemble requires driver version 0.90.0 or later.\n"
591 " Upgrade your kernel or try --build\n");
592 close(mdfd);
593 return 1;
594 }
595 if (mddev_busy(fd2devnum(mdfd))) {
596 fprintf(stderr, Name ": %s already active, cannot restart it!\n",
597 mddev);
598 for (tmpdev = devlist ;
599 tmpdev && tmpdev->used != 1;
600 tmpdev = tmpdev->next)
601 ;
602 if (tmpdev && auto_assem)
603 fprintf(stderr, Name ": %s needed for %s...\n",
604 mddev, tmpdev->devname);
605 close(mdfd);
606 mdfd = -3;
607 st->ss->free_super(st);
608 if (auto_assem)
609 goto try_again;
610 return 1;
611 }
612 ioctl(mdfd, STOP_ARRAY, NULL); /* just incase it was started but has no content */
613
614 #ifndef MDASSEMBLE
615 if (content != &info) {
616 /* This is a member of a container. Try starting the array. */
617 return assemble_container_content(st, mdfd, content, runstop,
618 chosen_name, verbose);
619 }
620 #endif
621 /* Ok, no bad inconsistancy, we can try updating etc */
622 bitmap_done = 0;
623 content->update_private = NULL;
624 devices = malloc(num_devs * sizeof(*devices));
625 devmap = calloc(num_devs * content->array.raid_disks, 1);
626 for (tmpdev = devlist; tmpdev; tmpdev=tmpdev->next) if (tmpdev->used == 1) {
627 char *devname = tmpdev->devname;
628 struct stat stb;
629 /* looks like a good enough match to update the super block if needed */
630 #ifndef MDASSEMBLE
631 if (update) {
632 int dfd;
633 /* prepare useful information in info structures */
634 struct stat stb2;
635 struct supertype *tst;
636 int err;
637 fstat(mdfd, &stb2);
638
639 if (strcmp(update, "uuid")==0 &&
640 !ident->uuid_set) {
641 int rfd;
642 if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
643 read(rfd, ident->uuid, 16) != 16) {
644 *(__u32*)(ident->uuid) = random();
645 *(__u32*)(ident->uuid+1) = random();
646 *(__u32*)(ident->uuid+2) = random();
647 *(__u32*)(ident->uuid+3) = random();
648 }
649 if (rfd >= 0) close(rfd);
650 }
651 dfd = dev_open(devname, O_RDWR|O_EXCL);
652
653 tst = dup_super(st);
654 if (dfd < 0 || tst->ss->load_super(tst, dfd, NULL) != 0) {
655 fprintf(stderr, Name ": cannot re-read metadata from %s - aborting\n",
656 devname);
657 if (dfd >= 0)
658 close(dfd);
659 close(mdfd);
660 free(devices);
661 free(devmap);
662 return 1;
663 }
664 tst->ss->getinfo_super(tst, content, devmap + devcnt * content->array.raid_disks);
665
666 memcpy(content->uuid, ident->uuid, 16);
667 strcpy(content->name, ident->name);
668 content->array.md_minor = minor(stb2.st_rdev);
669
670 if (strcmp(update, "byteorder") == 0)
671 err = 0;
672 else
673 err = tst->ss->update_super(tst, content, update,
674 devname, verbose,
675 ident->uuid_set,
676 homehost);
677 if (err < 0) {
678 fprintf(stderr,
679 Name ": --update=%s not understood"
680 " for %s metadata\n",
681 update, tst->ss->name);
682 tst->ss->free_super(tst);
683 free(tst);
684 close(mdfd);
685 close(dfd);
686 free(devices);
687 free(devmap);
688 return 1;
689 }
690 if (strcmp(update, "uuid")==0 &&
691 !ident->uuid_set) {
692 ident->uuid_set = 1;
693 memcpy(ident->uuid, content->uuid, 16);
694 }
695 if (tst->ss->store_super(tst, dfd))
696 fprintf(stderr, Name ": Could not re-write superblock on %s.\n",
697 devname);
698 close(dfd);
699
700 if (strcmp(update, "uuid")==0 &&
701 ident->bitmap_fd >= 0 && !bitmap_done) {
702 if (bitmap_update_uuid(ident->bitmap_fd,
703 content->uuid,
704 tst->ss->swapuuid) != 0)
705 fprintf(stderr, Name ": Could not update uuid on external bitmap.\n");
706 else
707 bitmap_done = 1;
708 }
709 tst->ss->free_super(tst);
710 } else
711 #endif
712 {
713 struct supertype *tst = dup_super(st);
714 int dfd;
715 dfd = dev_open(devname, O_RDWR|O_EXCL);
716
717 if (dfd < 0 || tst->ss->load_super(tst, dfd, NULL) != 0) {
718 fprintf(stderr, Name ": cannot re-read metadata from %s - aborting\n",
719 devname);
720 if (dfd >= 0)
721 close(dfd);
722 close(mdfd);
723 free(devices);
724 free(devmap);
725 return 1;
726 }
727 tst->ss->getinfo_super(tst, content, devmap + devcnt * content->array.raid_disks);
728 tst->ss->free_super(tst);
729 close(dfd);
730 }
731
732 stat(devname, &stb);
733
734 if (verbose > 0)
735 fprintf(stderr, Name ": %s is identified as a member of %s, slot %d.\n",
736 devname, mddev, content->disk.raid_disk);
737 devices[devcnt].devname = devname;
738 devices[devcnt].uptodate = 0;
739 devices[devcnt].i = *content;
740 devices[devcnt].i.disk.major = major(stb.st_rdev);
741 devices[devcnt].i.disk.minor = minor(stb.st_rdev);
742 if (most_recent < devcnt) {
743 if (devices[devcnt].i.events
744 > devices[most_recent].i.events)
745 most_recent = devcnt;
746 }
747 if (content->array.level == LEVEL_MULTIPATH)
748 /* with multipath, the raid_disk from the superblock is meaningless */
749 i = devcnt;
750 else
751 i = devices[devcnt].i.disk.raid_disk;
752 if (i+1 == 0) {
753 if (nextspare < content->array.raid_disks)
754 nextspare = content->array.raid_disks;
755 i = nextspare++;
756 } else {
757 if (i >= content->array.raid_disks &&
758 i >= nextspare)
759 nextspare = i+1;
760 }
761 if (i < 10000) {
762 if (i >= bestcnt) {
763 int newbestcnt = i+10;
764 int *newbest = malloc(sizeof(int)*newbestcnt);
765 int c;
766 for (c=0; c < newbestcnt; c++)
767 if (c < bestcnt)
768 newbest[c] = best[c];
769 else
770 newbest[c] = -1;
771 if (best)free(best);
772 best = newbest;
773 bestcnt = newbestcnt;
774 }
775 if (best[i] >=0 &&
776 devices[best[i]].i.events
777 == devices[devcnt].i.events
778 && (devices[best[i]].i.disk.minor
779 != devices[devcnt].i.disk.minor)
780 && st->ss == &super0
781 && content->array.level != LEVEL_MULTIPATH) {
782 /* two different devices with identical superblock.
783 * Could be a mis-detection caused by overlapping
784 * partitions. fail-safe.
785 */
786 fprintf(stderr, Name ": WARNING %s and %s appear"
787 " to have very similar superblocks.\n"
788 " If they are really different, "
789 "please --zero the superblock on one\n"
790 " If they are the same or overlap,"
791 " please remove one from %s.\n",
792 devices[best[i]].devname, devname,
793 inargv ? "the list" :
794 "the\n DEVICE list in mdadm.conf"
795 );
796 close(mdfd);
797 free(devices);
798 free(devmap);
799 return 1;
800 }
801 if (best[i] == -1
802 || (devices[best[i]].i.events
803 < devices[devcnt].i.events))
804 best[i] = devcnt;
805 }
806 devcnt++;
807 }
808 free(content->update_private);
809 content->update_private = NULL;
810
811 if (devcnt == 0) {
812 fprintf(stderr, Name ": no devices found for %s\n",
813 mddev);
814 if (st)
815 st->ss->free_super(st);
816 close(mdfd);
817 free(devices);
818 free(devmap);
819 return 1;
820 }
821
822 if (update && strcmp(update, "byteorder")==0)
823 st->minor_version = 90;
824
825 st->ss->getinfo_super(st, content, NULL);
826 clean = content->array.state & 1;
827
828 /* now we have some devices that might be suitable.
829 * I wonder how many
830 */
831 avail = malloc(content->array.raid_disks);
832 memset(avail, 0, content->array.raid_disks);
833 okcnt = 0;
834 sparecnt=0;
835 rebuilding_cnt=0;
836 for (i=0; i< bestcnt; i++) {
837 int j = best[i];
838 int event_margin = 1; /* always allow a difference of '1'
839 * like the kernel does
840 */
841 if (j < 0) continue;
842 /* note: we ignore error flags in multipath arrays
843 * as they don't make sense
844 */
845 if (content->array.level != LEVEL_MULTIPATH)
846 if (!(devices[j].i.disk.state & (1<<MD_DISK_ACTIVE))) {
847 if (!(devices[j].i.disk.state
848 & (1<<MD_DISK_FAULTY)))
849 sparecnt++;
850 continue;
851 }
852 /* If this devices thinks that 'most_recent' has failed, then
853 * we must reject this device.
854 */
855 if (j != most_recent &&
856 content->array.raid_disks > 0 &&
857 devices[most_recent].i.disk.raid_disk >= 0 &&
858 devmap[j * content->array.raid_disks + devices[most_recent].i.disk.raid_disk] == 0) {
859 if (verbose > -1)
860 fprintf(stderr, Name ": ignoring %s as it reports %s as failed\n",
861 devices[j].devname, devices[most_recent].devname);
862 best[i] = -1;
863 continue;
864 }
865 if (devices[j].i.events+event_margin >=
866 devices[most_recent].i.events) {
867 devices[j].uptodate = 1;
868 if (i < content->array.raid_disks) {
869 if (devices[j].i.recovery_start == MaxSector ||
870 (content->reshape_active &&
871 j >= content->array.raid_disks - content->delta_disks)) {
872 okcnt++;
873 avail[i]=1;
874 } else
875 rebuilding_cnt++;
876 } else
877 sparecnt++;
878 }
879 }
880 free(devmap);
881 while (force && !enough(content->array.level, content->array.raid_disks,
882 content->array.layout, 1,
883 avail, okcnt)) {
884 /* Choose the newest best drive which is
885 * not up-to-date, update the superblock
886 * and add it.
887 */
888 int fd;
889 struct supertype *tst;
890 unsigned long long current_events;
891 chosen_drive = -1;
892 for (i = 0; i < content->array.raid_disks && i < bestcnt; i++) {
893 int j = best[i];
894 if (j>=0 &&
895 !devices[j].uptodate &&
896 devices[j].i.recovery_start == MaxSector &&
897 (chosen_drive < 0 ||
898 devices[j].i.events
899 > devices[chosen_drive].i.events))
900 chosen_drive = j;
901 }
902 if (chosen_drive < 0)
903 break;
904 current_events = devices[chosen_drive].i.events;
905 add_another:
906 if (verbose >= 0)
907 fprintf(stderr, Name ": forcing event count in %s(%d) from %d upto %d\n",
908 devices[chosen_drive].devname,
909 devices[chosen_drive].i.disk.raid_disk,
910 (int)(devices[chosen_drive].i.events),
911 (int)(devices[most_recent].i.events));
912 fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL);
913 if (fd < 0) {
914 fprintf(stderr, Name ": Couldn't open %s for write - not updating\n",
915 devices[chosen_drive].devname);
916 devices[chosen_drive].i.events = 0;
917 continue;
918 }
919 tst = dup_super(st);
920 if (tst->ss->load_super(tst,fd, NULL)) {
921 close(fd);
922 fprintf(stderr, Name ": RAID superblock disappeared from %s - not updating.\n",
923 devices[chosen_drive].devname);
924 devices[chosen_drive].i.events = 0;
925 continue;
926 }
927 content->events = devices[most_recent].i.events;
928 tst->ss->update_super(tst, content, "force-one",
929 devices[chosen_drive].devname, verbose,
930 0, NULL);
931
932 if (tst->ss->store_super(tst, fd)) {
933 close(fd);
934 fprintf(stderr, Name ": Could not re-write superblock on %s\n",
935 devices[chosen_drive].devname);
936 devices[chosen_drive].i.events = 0;
937 tst->ss->free_super(tst);
938 continue;
939 }
940 close(fd);
941 devices[chosen_drive].i.events = devices[most_recent].i.events;
942 devices[chosen_drive].uptodate = 1;
943 avail[chosen_drive] = 1;
944 okcnt++;
945 tst->ss->free_super(tst);
946
947 /* If there are any other drives of the same vintage,
948 * add them in as well. We can't lose and we might gain
949 */
950 for (i = 0; i < content->array.raid_disks && i < bestcnt ; i++) {
951 int j = best[i];
952 if (j >= 0 &&
953 !devices[j].uptodate &&
954 devices[j].i.events == current_events) {
955 chosen_drive = j;
956 goto add_another;
957 }
958 }
959 }
960
961 /* Now we want to look at the superblock which the kernel will base things on
962 * and compare the devices that we think are working with the devices that the
963 * superblock thinks are working.
964 * If there are differences and --force is given, then update this chosen
965 * superblock.
966 */
967 chosen_drive = -1;
968 st->ss->free_super(st);
969 for (i=0; chosen_drive < 0 && i<bestcnt; i++) {
970 int j = best[i];
971 int fd;
972
973 if (j<0)
974 continue;
975 if (!devices[j].uptodate)
976 continue;
977 chosen_drive = j;
978 if ((fd=dev_open(devices[j].devname, O_RDONLY|O_EXCL))< 0) {
979 fprintf(stderr, Name ": Cannot open %s: %s\n",
980 devices[j].devname, strerror(errno));
981 close(mdfd);
982 free(devices);
983 return 1;
984 }
985 if (st->ss->load_super(st,fd, NULL)) {
986 close(fd);
987 fprintf(stderr, Name ": RAID superblock has disappeared from %s\n",
988 devices[j].devname);
989 close(mdfd);
990 free(devices);
991 return 1;
992 }
993 close(fd);
994 }
995 if (st->sb == NULL) {
996 fprintf(stderr, Name ": No suitable drives found for %s\n", mddev);
997 close(mdfd);
998 free(devices);
999 return 1;
1000 }
1001 st->ss->getinfo_super(st, content, NULL);
1002 #ifndef MDASSEMBLE
1003 sysfs_init(content, mdfd, 0);
1004 #endif
1005 for (i=0; i<bestcnt; i++) {
1006 int j = best[i];
1007 unsigned int desired_state;
1008
1009 if (i < content->array.raid_disks)
1010 desired_state = (1<<MD_DISK_ACTIVE) | (1<<MD_DISK_SYNC);
1011 else
1012 desired_state = 0;
1013
1014 if (j<0)
1015 continue;
1016 if (!devices[j].uptodate)
1017 continue;
1018
1019 devices[j].i.disk.state = desired_state;
1020 if (!(devices[j].i.array.state & 1))
1021 clean = 0;
1022
1023 if (st->ss->update_super(st, &devices[j].i, "assemble", NULL,
1024 verbose, 0, NULL)) {
1025 if (force) {
1026 if (verbose >= 0)
1027 fprintf(stderr, Name ": "
1028 "clearing FAULTY flag for device %d in %s for %s\n",
1029 j, mddev, devices[j].devname);
1030 change = 1;
1031 } else {
1032 if (verbose >= -1)
1033 fprintf(stderr, Name ": "
1034 "device %d in %s has wrong state in superblock, but %s seems ok\n",
1035 i, mddev, devices[j].devname);
1036 }
1037 }
1038 #if 0
1039 if (!(super.disks[i].i.disk.state & (1 << MD_DISK_FAULTY))) {
1040 fprintf(stderr, Name ": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n",
1041 i, mddev);
1042 }
1043 #endif
1044 }
1045 if (force && !clean &&
1046 !enough(content->array.level, content->array.raid_disks,
1047 content->array.layout, clean,
1048 avail, okcnt)) {
1049 change += st->ss->update_super(st, content, "force-array",
1050 devices[chosen_drive].devname, verbose,
1051 0, NULL);
1052 clean = 1;
1053 }
1054
1055 if (change) {
1056 int fd;
1057 fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL);
1058 if (fd < 0) {
1059 fprintf(stderr, Name ": Could not open %s for write - cannot Assemble array.\n",
1060 devices[chosen_drive].devname);
1061 close(mdfd);
1062 free(devices);
1063 return 1;
1064 }
1065 if (st->ss->store_super(st, fd)) {
1066 close(fd);
1067 fprintf(stderr, Name ": Could not re-write superblock on %s\n",
1068 devices[chosen_drive].devname);
1069 close(mdfd);
1070 free(devices);
1071 return 1;
1072 }
1073 close(fd);
1074 }
1075
1076 /* If we are in the middle of a reshape we may need to restore saved data
1077 * that was moved aside due to the reshape overwriting live data
1078 * The code of doing this lives in Grow.c
1079 */
1080 #ifndef MDASSEMBLE
1081 if (content->reshape_active) {
1082 int err = 0;
1083 int *fdlist = malloc(sizeof(int)* bestcnt);
1084 if (verbose > 0)
1085 fprintf(stderr, Name ":%s has an active reshape - checking "
1086 "if critical section needs to be restored\n",
1087 chosen_name);
1088 for (i=0; i<bestcnt; i++) {
1089 int j = best[i];
1090 if (j >= 0) {
1091 fdlist[i] = dev_open(devices[j].devname, O_RDWR|O_EXCL);
1092 if (fdlist[i] < 0) {
1093 fprintf(stderr, Name ": Could not open %s for write - cannot Assemble array.\n",
1094 devices[j].devname);
1095 err = 1;
1096 break;
1097 }
1098 } else
1099 fdlist[i] = -1;
1100 }
1101 if (!err) {
1102 err = Grow_restart(st, content, fdlist, bestcnt,
1103 backup_file, verbose > 0);
1104 if (err && invalid_backup) {
1105 if (verbose > 0)
1106 fprintf(stderr, Name ": continuing"
1107 " without restoring backup\n");
1108 err = 0;
1109 }
1110 }
1111 while (i>0) {
1112 i--;
1113 if (fdlist[i]>=0) close(fdlist[i]);
1114 }
1115 if (err) {
1116 fprintf(stderr, Name ": Failed to restore critical section for reshape, sorry.\n");
1117 if (backup_file == NULL)
1118 fprintf(stderr," Possibly you needed to specify the --backup-file\n");
1119 close(mdfd);
1120 free(devices);
1121 return err;
1122 }
1123 }
1124 #endif
1125 /* count number of in-sync devices according to the superblock.
1126 * We must have this number to start the array without -s or -R
1127 */
1128 req_cnt = content->array.working_disks;
1129
1130 /* Almost ready to actually *do* something */
1131 if (!old_linux) {
1132 int rv;
1133
1134 /* First, fill in the map, so that udev can find our name
1135 * as soon as we become active.
1136 */
1137 map_update(NULL, fd2devnum(mdfd), content->text_version,
1138 content->uuid, chosen_name);
1139
1140 rv = set_array_info(mdfd, st, content);
1141 if (rv) {
1142 fprintf(stderr, Name ": failed to set array info for %s: %s\n",
1143 mddev, strerror(errno));
1144 ioctl(mdfd, STOP_ARRAY, NULL);
1145 close(mdfd);
1146 free(devices);
1147 return 1;
1148 }
1149 if (ident->bitmap_fd >= 0) {
1150 if (ioctl(mdfd, SET_BITMAP_FILE, ident->bitmap_fd) != 0) {
1151 fprintf(stderr, Name ": SET_BITMAP_FILE failed.\n");
1152 ioctl(mdfd, STOP_ARRAY, NULL);
1153 close(mdfd);
1154 free(devices);
1155 return 1;
1156 }
1157 } else if (ident->bitmap_file) {
1158 /* From config file */
1159 int bmfd = open(ident->bitmap_file, O_RDWR);
1160 if (bmfd < 0) {
1161 fprintf(stderr, Name ": Could not open bitmap file %s\n",
1162 ident->bitmap_file);
1163 ioctl(mdfd, STOP_ARRAY, NULL);
1164 close(mdfd);
1165 free(devices);
1166 return 1;
1167 }
1168 if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) {
1169 fprintf(stderr, Name ": Failed to set bitmapfile for %s\n", mddev);
1170 close(bmfd);
1171 ioctl(mdfd, STOP_ARRAY, NULL);
1172 close(mdfd);
1173 free(devices);
1174 return 1;
1175 }
1176 close(bmfd);
1177 }
1178
1179 /* First, add the raid disks, but add the chosen one last */
1180 for (i=0; i<= bestcnt; i++) {
1181 int j;
1182 if (i < bestcnt) {
1183 j = best[i];
1184 if (j == chosen_drive)
1185 continue;
1186 } else
1187 j = chosen_drive;
1188
1189 if (j >= 0 /* && devices[j].uptodate */) {
1190 int dfd = dev_open(devices[j].devname,
1191 O_RDWR|O_EXCL);
1192 if (dfd >= 0) {
1193 remove_partitions(dfd);
1194 close(dfd);
1195 }
1196 rv = add_disk(mdfd, st, content, &devices[j].i);
1197
1198 if (rv) {
1199 fprintf(stderr, Name ": failed to add "
1200 "%s to %s: %s\n",
1201 devices[j].devname,
1202 mddev,
1203 strerror(errno));
1204 if (i < content->array.raid_disks
1205 || i == bestcnt)
1206 okcnt--;
1207 else
1208 sparecnt--;
1209 } else if (verbose > 0)
1210 fprintf(stderr, Name ": added %s "
1211 "to %s as %d\n",
1212 devices[j].devname, mddev,
1213 devices[j].i.disk.raid_disk);
1214 } else if (verbose > 0 && i < content->array.raid_disks)
1215 fprintf(stderr, Name ": no uptodate device for "
1216 "slot %d of %s\n",
1217 i, mddev);
1218 }
1219
1220 if (content->array.level == LEVEL_CONTAINER) {
1221 if (verbose >= 0) {
1222 fprintf(stderr, Name ": Container %s has been "
1223 "assembled with %d drive%s",
1224 mddev, okcnt+sparecnt, okcnt+sparecnt==1?"":"s");
1225 if (okcnt < (unsigned)content->array.raid_disks)
1226 fprintf(stderr, " (out of %d)",
1227 content->array.raid_disks);
1228 fprintf(stderr, "\n");
1229 }
1230 sysfs_uevent(content, "change");
1231 wait_for(chosen_name, mdfd);
1232 close(mdfd);
1233 free(devices);
1234 return 0;
1235 }
1236
1237 if (runstop == 1 ||
1238 (runstop <= 0 &&
1239 ( enough(content->array.level, content->array.raid_disks,
1240 content->array.layout, clean, avail, okcnt) &&
1241 (okcnt + rebuilding_cnt >= req_cnt || start_partial_ok)
1242 ))) {
1243 /* This array is good-to-go.
1244 * If a reshape is in progress then we might need to
1245 * continue monitoring it. In that case we start
1246 * it read-only and let the grow code make it writable.
1247 */
1248 int rv;
1249 #ifndef MDASSEMBLE
1250 if (content->reshape_active &&
1251 content->delta_disks <= 0)
1252 rv = Grow_continue(mdfd, st, content, backup_file);
1253 else
1254 #endif
1255 rv = ioctl(mdfd, RUN_ARRAY, NULL);
1256 if (rv == 0) {
1257 if (verbose >= 0) {
1258 fprintf(stderr, Name ": %s has been started with %d drive%s",
1259 mddev, okcnt, okcnt==1?"":"s");
1260 if (okcnt < (unsigned)content->array.raid_disks)
1261 fprintf(stderr, " (out of %d)", content->array.raid_disks);
1262 if (rebuilding_cnt)
1263 fprintf(stderr, "%s %d rebuilding", sparecnt?",":" and", rebuilding_cnt);
1264 if (sparecnt)
1265 fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s");
1266 fprintf(stderr, ".\n");
1267 }
1268 if (content->reshape_active &&
1269 content->array.level >= 4 &&
1270 content->array.level <= 6) {
1271 /* might need to increase the size
1272 * of the stripe cache - default is 256
1273 */
1274 if (256 < 4 * (content->array.chunk_size/4096)) {
1275 struct mdinfo *sra = sysfs_read(mdfd, 0, 0);
1276 if (sra)
1277 sysfs_set_num(sra, NULL,
1278 "stripe_cache_size",
1279 (4 * content->array.chunk_size / 4096) + 1);
1280 }
1281 }
1282 if (okcnt < (unsigned)content->array.raid_disks) {
1283 /* If any devices did not get added
1284 * because the kernel rejected them based
1285 * on event count, try adding them
1286 * again providing the action policy is
1287 * 're-add' or greater. The bitmap
1288 * might allow them to be included, or
1289 * they will become spares.
1290 */
1291 for (i = 0; i <= bestcnt; i++) {
1292 int j = best[i];
1293 if (j >= 0 && !devices[j].uptodate) {
1294 if (!disk_action_allows(&devices[j].i, st->ss->name, act_re_add))
1295 continue;
1296 rv = add_disk(mdfd, st, content,
1297 &devices[j].i);
1298 if (rv == 0 && verbose >= 0)
1299 fprintf(stderr,
1300 Name ": %s has been re-added.\n",
1301 devices[j].devname);
1302 }
1303 }
1304 }
1305 wait_for(mddev, mdfd);
1306 close(mdfd);
1307 if (auto_assem) {
1308 int usecs = 1;
1309 /* There is a nasty race with 'mdadm --monitor'.
1310 * If it opens this device before we close it,
1311 * it gets an incomplete open on which IO
1312 * doesn't work and the capacity is
1313 * wrong.
1314 * If we reopen (to check for layered devices)
1315 * before --monitor closes, we loose.
1316 *
1317 * So: wait upto 1 second for there to be
1318 * a non-zero capacity.
1319 */
1320 while (usecs < 1000) {
1321 mdfd = open(mddev, O_RDONLY);
1322 if (mdfd >= 0) {
1323 unsigned long long size;
1324 if (get_dev_size(mdfd, NULL, &size) &&
1325 size > 0)
1326 break;
1327 close(mdfd);
1328 }
1329 usleep(usecs);
1330 usecs <<= 1;
1331 }
1332 }
1333 free(devices);
1334 return 0;
1335 }
1336 fprintf(stderr, Name ": failed to RUN_ARRAY %s: %s\n",
1337 mddev, strerror(errno));
1338
1339 if (!enough(content->array.level, content->array.raid_disks,
1340 content->array.layout, 1, avail, okcnt))
1341 fprintf(stderr, Name ": Not enough devices to "
1342 "start the array.\n");
1343 else if (!enough(content->array.level,
1344 content->array.raid_disks,
1345 content->array.layout, clean,
1346 avail, okcnt))
1347 fprintf(stderr, Name ": Not enough devices to "
1348 "start the array while not clean "
1349 "- consider --force.\n");
1350
1351 if (auto_assem)
1352 ioctl(mdfd, STOP_ARRAY, NULL);
1353 close(mdfd);
1354 free(devices);
1355 return 1;
1356 }
1357 if (runstop == -1) {
1358 fprintf(stderr, Name ": %s assembled from %d drive%s",
1359 mddev, okcnt, okcnt==1?"":"s");
1360 if (okcnt != (unsigned)content->array.raid_disks)
1361 fprintf(stderr, " (out of %d)", content->array.raid_disks);
1362 fprintf(stderr, ", but not started.\n");
1363 close(mdfd);
1364 free(devices);
1365 return 0;
1366 }
1367 if (verbose >= -1) {
1368 fprintf(stderr, Name ": %s assembled from %d drive%s", mddev, okcnt, okcnt==1?"":"s");
1369 if (rebuilding_cnt)
1370 fprintf(stderr, "%s %d rebuilding", sparecnt?", ":" and ", rebuilding_cnt);
1371 if (sparecnt)
1372 fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s");
1373 if (!enough(content->array.level, content->array.raid_disks,
1374 content->array.layout, 1, avail, okcnt))
1375 fprintf(stderr, " - not enough to start the array.\n");
1376 else if (!enough(content->array.level,
1377 content->array.raid_disks,
1378 content->array.layout, clean,
1379 avail, okcnt))
1380 fprintf(stderr, " - not enough to start the "
1381 "array while not clean - consider "
1382 "--force.\n");
1383 else {
1384 if (req_cnt == (unsigned)content->array.raid_disks)
1385 fprintf(stderr, " - need all %d to start it", req_cnt);
1386 else
1387 fprintf(stderr, " - need %d of %d to start", req_cnt, content->array.raid_disks);
1388 fprintf(stderr, " (use --run to insist).\n");
1389 }
1390 }
1391 if (auto_assem)
1392 ioctl(mdfd, STOP_ARRAY, NULL);
1393 close(mdfd);
1394 free(devices);
1395 return 1;
1396 } else {
1397 /* The "chosen_drive" is a good choice, and if necessary, the superblock has
1398 * been updated to point to the current locations of devices.
1399 * so we can just start the array
1400 */
1401 unsigned long dev;
1402 dev = makedev(devices[chosen_drive].i.disk.major,
1403 devices[chosen_drive].i.disk.minor);
1404 if (ioctl(mdfd, START_ARRAY, dev)) {
1405 fprintf(stderr, Name ": Cannot start array: %s\n",
1406 strerror(errno));
1407 }
1408
1409 }
1410 close(mdfd);
1411 free(devices);
1412 return 0;
1413 }
1414
1415 #ifndef MDASSEMBLE
1416 int assemble_container_content(struct supertype *st, int mdfd,
1417 struct mdinfo *content, int runstop,
1418 char *chosen_name, int verbose)
1419 {
1420 struct mdinfo *dev, *sra;
1421 int working = 0, preexist = 0;
1422 struct map_ent *map = NULL;
1423
1424 sysfs_init(content, mdfd, 0);
1425
1426 sra = sysfs_read(mdfd, 0, GET_VERSION);
1427 if (sra == NULL || strcmp(sra->text_version, content->text_version) != 0)
1428 if (sysfs_set_array(content, md_get_version(mdfd)) != 0) {
1429 close(mdfd);
1430 return 1;
1431 }
1432 if (sra)
1433 sysfs_free(sra);
1434
1435 for (dev = content->devs; dev; dev = dev->next)
1436 if (sysfs_add_disk(content, dev, 1) == 0)
1437 working++;
1438 else if (errno == EEXIST)
1439 preexist++;
1440 if (working == 0) {
1441 close(mdfd);
1442 return 1;/* Nothing new, don't try to start */
1443 }
1444
1445 map_update(&map, fd2devnum(mdfd),
1446 content->text_version,
1447 content->uuid, chosen_name);
1448
1449 if (runstop > 0 ||
1450 (working + preexist) >= content->array.working_disks) {
1451 int err;
1452
1453 switch(content->array.level) {
1454 case LEVEL_LINEAR:
1455 case LEVEL_MULTIPATH:
1456 case 0:
1457 err = sysfs_set_str(content, NULL, "array_state",
1458 "active");
1459 break;
1460 default:
1461 err = sysfs_set_str(content, NULL, "array_state",
1462 "readonly");
1463 /* start mdmon if needed. */
1464 if (!err) {
1465 if (!mdmon_running(st->container_dev))
1466 start_mdmon(st->container_dev);
1467 ping_monitor(devnum2devname(st->container_dev));
1468 }
1469 break;
1470 }
1471 if (!err)
1472 sysfs_set_safemode(content, content->safe_mode_delay);
1473 if (verbose >= 0) {
1474 if (err)
1475 fprintf(stderr, Name
1476 ": array %s now has %d devices",
1477 chosen_name, working + preexist);
1478 else
1479 fprintf(stderr, Name
1480 ": Started %s with %d devices",
1481 chosen_name, working + preexist);
1482 if (preexist)
1483 fprintf(stderr, " (%d new)", working);
1484 fprintf(stderr, "\n");
1485 }
1486 if (!err)
1487 wait_for(chosen_name, mdfd);
1488 close(mdfd);
1489 return 0;
1490 /* FIXME should have an O_EXCL and wait for read-auto */
1491 } else {
1492 if (verbose >= 0)
1493 fprintf(stderr, Name
1494 ": %s assembled with %d devices but "
1495 "not started\n",
1496 chosen_name, working);
1497 close(mdfd);
1498 return 1;
1499 }
1500 }
1501 #endif
1502
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