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Provide a mdstat_ent to subarray helper
[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 ? tmpdev->next : NULL) {
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 int found_container = 0;
296
297 if (tmpdev->used > 1) continue;
298
299 if (ident->devices &&
300 !match_oneof(ident->devices, devname)) {
301 if (report_missmatch)
302 fprintf(stderr, Name ": %s is not one of %s\n", devname, ident->devices);
303 continue;
304 }
305
306 dfd = dev_open(devname, O_RDONLY|O_EXCL);
307 if (dfd < 0) {
308 if (report_missmatch)
309 fprintf(stderr, Name ": cannot open device %s: %s\n",
310 devname, strerror(errno));
311 tmpdev->used = 2;
312 } else if (fstat(dfd, &stb)< 0) {
313 /* Impossible! */
314 fprintf(stderr, Name ": fstat failed for %s: %s\n",
315 devname, strerror(errno));
316 tmpdev->used = 2;
317 } else if ((stb.st_mode & S_IFMT) != S_IFBLK) {
318 fprintf(stderr, Name ": %s is not a block device.\n",
319 devname);
320 tmpdev->used = 2;
321 } else if (must_be_container(dfd)) {
322 if (st) {
323 /* already found some components, this cannot
324 * be another one.
325 */
326 if (report_missmatch)
327 fprintf(stderr, Name ": %s is a container, but we are looking for components\n",
328 devname);
329 tmpdev->used = 2;
330 } if (!tst && (tst = super_by_fd(dfd, NULL)) == NULL) {
331 if (report_missmatch)
332 fprintf(stderr, Name ": not a recognisable container: %s\n",
333 devname);
334 tmpdev->used = 2;
335 } else if (tst->ss->load_container(tst, dfd, NULL)) {
336 if (report_missmatch)
337 fprintf(stderr, Name ": no correct container type: %s\n",
338 devname);
339 tmpdev->used = 2;
340 } else if (auto_assem &&
341 !conf_test_metadata(tst->ss->name, (pol = devnum_policy(stb.st_rdev)),
342 tst->ss->match_home(tst, homehost) == 1)) {
343 if (report_missmatch)
344 fprintf(stderr, Name ": %s has metadata type %s for which "
345 "auto-assembly is disabled\n",
346 devname, tst->ss->name);
347 tmpdev->used = 2;
348 } else
349 found_container = 1;
350 } else {
351 if (!tst && (tst = guess_super(dfd)) == NULL) {
352 if (report_missmatch)
353 fprintf(stderr, Name ": no recogniseable superblock on %s\n",
354 devname);
355 tmpdev->used = 2;
356 } else if (tst->ss->load_super(tst,dfd, NULL)) {
357 if (report_missmatch)
358 fprintf(stderr, Name ": no RAID superblock on %s\n",
359 devname);
360 tmpdev->used = 2;
361 } else if (tst->ss->compare_super == NULL) {
362 if (report_missmatch)
363 fprintf(stderr, Name ": Cannot assemble %s metadata on %s\n",
364 tst->ss->name, devname);
365 tmpdev->used = 2;
366 } else if (auto_assem && st == NULL &&
367 !conf_test_metadata(tst->ss->name, (pol = devnum_policy(stb.st_rdev)),
368 tst->ss->match_home(tst, homehost) == 1)) {
369 if (report_missmatch)
370 fprintf(stderr, Name ": %s has metadata type %s for which "
371 "auto-assembly is disabled\n",
372 devname, tst->ss->name);
373 tmpdev->used = 2;
374 }
375 }
376 if (dfd >= 0) close(dfd);
377 if (tmpdev->used == 2) {
378 if (auto_assem)
379 /* Ignore unrecognised devices during auto-assembly */
380 goto loop;
381 if (ident->uuid_set || ident->name[0] ||
382 ident->super_minor != UnSet)
383 /* Ignore unrecognised device if looking for
384 * specific array */
385 goto loop;
386
387
388 fprintf(stderr, Name ": %s has no superblock - assembly aborted\n",
389 devname);
390 if (st)
391 st->ss->free_super(st);
392 dev_policy_free(pol);
393 return 1;
394 }
395
396 if (found_container) {
397 /* tmpdev is a container. We need to be either
398 * looking for a member, or auto-assembling
399 */
400
401 if (ident->container) {
402 if (ident->container[0] == '/' &&
403 !same_dev(ident->container, devname)) {
404 if (report_missmatch)
405 fprintf(stderr, Name ": %s is not the container required (%s)\n",
406 devname, ident->container);
407 goto loop;
408 }
409 if (ident->container[0] != '/') {
410 /* we have a uuid */
411 int uuid[4];
412
413 content = &info;
414 memset(content, 0, sizeof(*content));
415 tst->ss->getinfo_super(tst, content, NULL);
416
417 if (!parse_uuid(ident->container, uuid) ||
418 !same_uuid(content->uuid, uuid, tst->ss->swapuuid)) {
419 if (report_missmatch)
420 fprintf(stderr, Name ": %s has wrong UUID to be required container\n",
421 devname);
422 goto loop;
423 }
424 }
425 }
426 /* It is worth looking inside this container.
427 */
428 if (verbose > 0)
429 fprintf(stderr, Name ": looking in container %s\n",
430 devname);
431
432 for (content = tst->ss->container_content(tst, NULL);
433 content;
434 content = content->next) {
435
436 if (!ident_matches(ident, content, tst,
437 homehost, update,
438 report_missmatch ? devname : NULL))
439 /* message already printed */;
440 else if (is_member_busy(content->text_version)) {
441 if (report_missmatch)
442 fprintf(stderr, Name ": member %s in %s is already assembled\n",
443 content->text_version,
444 devname);
445 } else
446 break;
447 }
448 if (!content) {
449 tmpdev->used = 2;
450 goto loop; /* empty container */
451 }
452
453 st = tst; tst = NULL;
454 if (!auto_assem && inargv && tmpdev->next != NULL) {
455 fprintf(stderr, Name ": %s is a container, but is not "
456 "only device given: confused and aborting\n",
457 devname);
458 st->ss->free_super(st);
459 dev_policy_free(pol);
460 return 1;
461 }
462 if (verbose > 0)
463 fprintf(stderr, Name ": found match on member %s in %s\n",
464 content->text_version, devname);
465
466 /* make sure we finished the loop */
467 tmpdev = NULL;
468 goto loop;
469 } else {
470
471 content = &info;
472 memset(content, 0, sizeof(*content));
473 tst->ss->getinfo_super(tst, content, NULL);
474
475 if (!ident_matches(ident, content, tst,
476 homehost, update,
477 report_missmatch ? devname : NULL))
478 goto loop;
479
480 if (st == NULL)
481 st = dup_super(tst);
482 if (st->minor_version == -1)
483 st->minor_version = tst->minor_version;
484 if (st->ss != tst->ss ||
485 st->minor_version != tst->minor_version ||
486 st->ss->compare_super(st, tst) != 0) {
487 /* Some mismatch. If exactly one array matches this host,
488 * we can resolve on that one.
489 * Or, if we are auto assembling, we just ignore the second
490 * for now.
491 */
492 if (auto_assem)
493 goto loop;
494 if (homehost) {
495 int first = st->ss->match_home(st, homehost);
496 int last = tst->ss->match_home(tst, homehost);
497 if (first != last &&
498 (first == 1 || last == 1)) {
499 /* We can do something */
500 if (first) {/* just ignore this one */
501 if (report_missmatch)
502 fprintf(stderr, Name ": %s misses out due to wrong homehost\n",
503 devname);
504 goto loop;
505 } else { /* reject all those sofar */
506 struct mddev_dev *td;
507 if (report_missmatch)
508 fprintf(stderr, Name ": %s overrides previous devices due to good homehost\n",
509 devname);
510 for (td=devlist; td != tmpdev; td=td->next)
511 if (td->used == 1)
512 td->used = 0;
513 tmpdev->used = 1;
514 goto loop;
515 }
516 }
517 }
518 fprintf(stderr, Name ": superblock on %s doesn't match others - assembly aborted\n",
519 devname);
520 tst->ss->free_super(tst);
521 st->ss->free_super(st);
522 dev_policy_free(pol);
523 return 1;
524 }
525 tmpdev->used = 1;
526 }
527 loop:
528 dev_policy_free(pol);
529 pol = NULL;
530 if (tst)
531 tst->ss->free_super(tst);
532 }
533
534 if (!st || !st->sb || !content)
535 return 2;
536
537 /* Now need to open the array device. Use create_mddev */
538 if (content == &info)
539 st->ss->getinfo_super(st, content, NULL);
540
541 trustworthy = FOREIGN;
542 name = content->name;
543 switch (st->ss->match_home(st, homehost)
544 ?: st->ss->match_home(st, "any")) {
545 case 1:
546 trustworthy = LOCAL;
547 name = strchr(content->name, ':');
548 if (name)
549 name++;
550 else
551 name = content->name;
552 break;
553 }
554 if (!auto_assem)
555 /* If the array is listed in mdadm.conf or on
556 * command line, then we trust the name
557 * even if the array doesn't look local
558 */
559 trustworthy = LOCAL;
560
561 if (name[0] == 0 &&
562 content->array.level == LEVEL_CONTAINER) {
563 name = content->text_version;
564 trustworthy = METADATA;
565 }
566
567 if (name[0] && trustworthy != LOCAL &&
568 ! require_homehost &&
569 conf_name_is_free(name))
570 trustworthy = LOCAL;
571
572 if (trustworthy == LOCAL &&
573 strchr(name, ':'))
574 /* Ignore 'host:' prefix of name */
575 name = strchr(name, ':')+1;
576
577 mdfd = create_mddev(mddev, name, ident->autof, trustworthy,
578 chosen_name);
579 if (mdfd < 0) {
580 st->ss->free_super(st);
581 if (auto_assem)
582 goto try_again;
583 return 1;
584 }
585 mddev = chosen_name;
586 vers = md_get_version(mdfd);
587 if (vers < 9000) {
588 fprintf(stderr, Name ": Assemble requires driver version 0.90.0 or later.\n"
589 " Upgrade your kernel or try --build\n");
590 close(mdfd);
591 return 1;
592 }
593 if (mddev_busy(fd2devnum(mdfd))) {
594 fprintf(stderr, Name ": %s already active, cannot restart it!\n",
595 mddev);
596 for (tmpdev = devlist ;
597 tmpdev && tmpdev->used != 1;
598 tmpdev = tmpdev->next)
599 ;
600 if (tmpdev && auto_assem)
601 fprintf(stderr, Name ": %s needed for %s...\n",
602 mddev, tmpdev->devname);
603 close(mdfd);
604 mdfd = -3;
605 st->ss->free_super(st);
606 if (auto_assem)
607 goto try_again;
608 return 1;
609 }
610 ioctl(mdfd, STOP_ARRAY, NULL); /* just incase it was started but has no content */
611
612 #ifndef MDASSEMBLE
613 if (content != &info) {
614 /* This is a member of a container. Try starting the array. */
615 return assemble_container_content(st, mdfd, content, runstop,
616 chosen_name, verbose);
617 }
618 #endif
619 /* Ok, no bad inconsistancy, we can try updating etc */
620 bitmap_done = 0;
621 content->update_private = NULL;
622 devices = malloc(num_devs * sizeof(*devices));
623 devmap = calloc(num_devs * content->array.raid_disks, 1);
624 for (tmpdev = devlist; tmpdev; tmpdev=tmpdev->next) if (tmpdev->used == 1) {
625 char *devname = tmpdev->devname;
626 struct stat stb;
627 /* looks like a good enough match to update the super block if needed */
628 #ifndef MDASSEMBLE
629 if (update) {
630 int dfd;
631 /* prepare useful information in info structures */
632 struct stat stb2;
633 struct supertype *tst;
634 int err;
635 fstat(mdfd, &stb2);
636
637 if (strcmp(update, "uuid")==0 &&
638 !ident->uuid_set) {
639 int rfd;
640 if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
641 read(rfd, ident->uuid, 16) != 16) {
642 *(__u32*)(ident->uuid) = random();
643 *(__u32*)(ident->uuid+1) = random();
644 *(__u32*)(ident->uuid+2) = random();
645 *(__u32*)(ident->uuid+3) = random();
646 }
647 if (rfd >= 0) close(rfd);
648 }
649 dfd = dev_open(devname, O_RDWR|O_EXCL);
650
651 remove_partitions(dfd);
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 remove_partitions(dfd);
718
719 if (dfd < 0 || tst->ss->load_super(tst, dfd, NULL) != 0) {
720 fprintf(stderr, Name ": cannot re-read metadata from %s - aborting\n",
721 devname);
722 if (dfd >= 0)
723 close(dfd);
724 close(mdfd);
725 free(devices);
726 free(devmap);
727 return 1;
728 }
729 tst->ss->getinfo_super(tst, content, devmap + devcnt * content->array.raid_disks);
730 tst->ss->free_super(tst);
731 close(dfd);
732 }
733
734 stat(devname, &stb);
735
736 if (verbose > 0)
737 fprintf(stderr, Name ": %s is identified as a member of %s, slot %d.\n",
738 devname, mddev, content->disk.raid_disk);
739 devices[devcnt].devname = devname;
740 devices[devcnt].uptodate = 0;
741 devices[devcnt].i = *content;
742 devices[devcnt].i.disk.major = major(stb.st_rdev);
743 devices[devcnt].i.disk.minor = minor(stb.st_rdev);
744 if (most_recent < devcnt) {
745 if (devices[devcnt].i.events
746 > devices[most_recent].i.events)
747 most_recent = devcnt;
748 }
749 if (content->array.level == LEVEL_MULTIPATH)
750 /* with multipath, the raid_disk from the superblock is meaningless */
751 i = devcnt;
752 else
753 i = devices[devcnt].i.disk.raid_disk;
754 if (i+1 == 0) {
755 if (nextspare < content->array.raid_disks)
756 nextspare = content->array.raid_disks;
757 i = nextspare++;
758 } else {
759 if (i >= content->array.raid_disks &&
760 i >= nextspare)
761 nextspare = i+1;
762 }
763 if (i < 10000) {
764 if (i >= bestcnt) {
765 int newbestcnt = i+10;
766 int *newbest = malloc(sizeof(int)*newbestcnt);
767 int c;
768 for (c=0; c < newbestcnt; c++)
769 if (c < bestcnt)
770 newbest[c] = best[c];
771 else
772 newbest[c] = -1;
773 if (best)free(best);
774 best = newbest;
775 bestcnt = newbestcnt;
776 }
777 if (best[i] >=0 &&
778 devices[best[i]].i.events
779 == devices[devcnt].i.events
780 && (devices[best[i]].i.disk.minor
781 != devices[devcnt].i.disk.minor)
782 && st->ss == &super0
783 && content->array.level != LEVEL_MULTIPATH) {
784 /* two different devices with identical superblock.
785 * Could be a mis-detection caused by overlapping
786 * partitions. fail-safe.
787 */
788 fprintf(stderr, Name ": WARNING %s and %s appear"
789 " to have very similar superblocks.\n"
790 " If they are really different, "
791 "please --zero the superblock on one\n"
792 " If they are the same or overlap,"
793 " please remove one from %s.\n",
794 devices[best[i]].devname, devname,
795 inargv ? "the list" :
796 "the\n DEVICE list in mdadm.conf"
797 );
798 close(mdfd);
799 free(devices);
800 free(devmap);
801 return 1;
802 }
803 if (best[i] == -1
804 || (devices[best[i]].i.events
805 < devices[devcnt].i.events))
806 best[i] = devcnt;
807 }
808 devcnt++;
809 }
810 free(content->update_private);
811 content->update_private = NULL;
812
813 if (devcnt == 0) {
814 fprintf(stderr, Name ": no devices found for %s\n",
815 mddev);
816 if (st)
817 st->ss->free_super(st);
818 close(mdfd);
819 free(devices);
820 free(devmap);
821 return 1;
822 }
823
824 if (update && strcmp(update, "byteorder")==0)
825 st->minor_version = 90;
826
827 st->ss->getinfo_super(st, content, NULL);
828 clean = content->array.state & 1;
829
830 /* now we have some devices that might be suitable.
831 * I wonder how many
832 */
833 avail = malloc(content->array.raid_disks);
834 memset(avail, 0, content->array.raid_disks);
835 okcnt = 0;
836 sparecnt=0;
837 rebuilding_cnt=0;
838 for (i=0; i< bestcnt; i++) {
839 int j = best[i];
840 int event_margin = 1; /* always allow a difference of '1'
841 * like the kernel does
842 */
843 if (j < 0) continue;
844 /* note: we ignore error flags in multipath arrays
845 * as they don't make sense
846 */
847 if (content->array.level != LEVEL_MULTIPATH)
848 if (!(devices[j].i.disk.state & (1<<MD_DISK_ACTIVE))) {
849 if (!(devices[j].i.disk.state
850 & (1<<MD_DISK_FAULTY)))
851 sparecnt++;
852 continue;
853 }
854 /* If this devices thinks that 'most_recent' has failed, then
855 * we must reject this device.
856 */
857 if (j != most_recent &&
858 content->array.raid_disks > 0 &&
859 devices[most_recent].i.disk.raid_disk >= 0 &&
860 devmap[j * content->array.raid_disks + devices[most_recent].i.disk.raid_disk] == 0) {
861 if (verbose > -1)
862 fprintf(stderr, Name ": ignoring %s as it reports %s as failed\n",
863 devices[j].devname, devices[most_recent].devname);
864 best[i] = -1;
865 continue;
866 }
867 if (devices[j].i.events+event_margin >=
868 devices[most_recent].i.events) {
869 devices[j].uptodate = 1;
870 if (i < content->array.raid_disks) {
871 if (devices[j].i.recovery_start == MaxSector) {
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, backup_file, verbose > 0);
1103 while (i>0) {
1104 i--;
1105 if (fdlist[i]>=0) close(fdlist[i]);
1106 }
1107 if (err) {
1108 fprintf(stderr, Name ": Failed to restore critical section for reshape, sorry.\n");
1109 if (backup_file == NULL)
1110 fprintf(stderr," Possibly you needed to specify the --backup-file\n");
1111 close(mdfd);
1112 free(devices);
1113 return err;
1114 }
1115 }
1116 #endif
1117 /* count number of in-sync devices according to the superblock.
1118 * We must have this number to start the array without -s or -R
1119 */
1120 req_cnt = content->array.working_disks;
1121
1122 /* Almost ready to actually *do* something */
1123 if (!old_linux) {
1124 int rv;
1125
1126 /* First, fill in the map, so that udev can find our name
1127 * as soon as we become active.
1128 */
1129 map_update(NULL, fd2devnum(mdfd), content->text_version,
1130 content->uuid, chosen_name);
1131
1132 rv = set_array_info(mdfd, st, content);
1133 if (rv) {
1134 fprintf(stderr, Name ": failed to set array info for %s: %s\n",
1135 mddev, strerror(errno));
1136 ioctl(mdfd, STOP_ARRAY, NULL);
1137 close(mdfd);
1138 free(devices);
1139 return 1;
1140 }
1141 if (ident->bitmap_fd >= 0) {
1142 if (ioctl(mdfd, SET_BITMAP_FILE, ident->bitmap_fd) != 0) {
1143 fprintf(stderr, Name ": SET_BITMAP_FILE failed.\n");
1144 ioctl(mdfd, STOP_ARRAY, NULL);
1145 close(mdfd);
1146 free(devices);
1147 return 1;
1148 }
1149 } else if (ident->bitmap_file) {
1150 /* From config file */
1151 int bmfd = open(ident->bitmap_file, O_RDWR);
1152 if (bmfd < 0) {
1153 fprintf(stderr, Name ": Could not open bitmap file %s\n",
1154 ident->bitmap_file);
1155 ioctl(mdfd, STOP_ARRAY, NULL);
1156 close(mdfd);
1157 free(devices);
1158 return 1;
1159 }
1160 if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) {
1161 fprintf(stderr, Name ": Failed to set bitmapfile for %s\n", mddev);
1162 close(bmfd);
1163 ioctl(mdfd, STOP_ARRAY, NULL);
1164 close(mdfd);
1165 free(devices);
1166 return 1;
1167 }
1168 close(bmfd);
1169 }
1170
1171 /* First, add the raid disks, but add the chosen one last */
1172 for (i=0; i<= bestcnt; i++) {
1173 int j;
1174 if (i < bestcnt) {
1175 j = best[i];
1176 if (j == chosen_drive)
1177 continue;
1178 } else
1179 j = chosen_drive;
1180
1181 if (j >= 0 /* && devices[j].uptodate */) {
1182 rv = add_disk(mdfd, st, content, &devices[j].i);
1183
1184 if (rv) {
1185 fprintf(stderr, Name ": failed to add "
1186 "%s to %s: %s\n",
1187 devices[j].devname,
1188 mddev,
1189 strerror(errno));
1190 if (i < content->array.raid_disks
1191 || i == bestcnt)
1192 okcnt--;
1193 else
1194 sparecnt--;
1195 } else if (verbose > 0)
1196 fprintf(stderr, Name ": added %s "
1197 "to %s as %d\n",
1198 devices[j].devname, mddev,
1199 devices[j].i.disk.raid_disk);
1200 } else if (verbose > 0 && i < content->array.raid_disks)
1201 fprintf(stderr, Name ": no uptodate device for "
1202 "slot %d of %s\n",
1203 i, mddev);
1204 }
1205
1206 if (content->array.level == LEVEL_CONTAINER) {
1207 if (verbose >= 0) {
1208 fprintf(stderr, Name ": Container %s has been "
1209 "assembled with %d drive%s",
1210 mddev, okcnt+sparecnt, okcnt+sparecnt==1?"":"s");
1211 if (okcnt < (unsigned)content->array.raid_disks)
1212 fprintf(stderr, " (out of %d)",
1213 content->array.raid_disks);
1214 fprintf(stderr, "\n");
1215 }
1216 sysfs_uevent(content, "change");
1217 wait_for(chosen_name, mdfd);
1218 close(mdfd);
1219 free(devices);
1220 return 0;
1221 }
1222
1223 if (runstop == 1 ||
1224 (runstop <= 0 &&
1225 ( enough(content->array.level, content->array.raid_disks,
1226 content->array.layout, clean, avail, okcnt) &&
1227 (okcnt + rebuilding_cnt >= req_cnt || start_partial_ok)
1228 ))) {
1229 /* This array is good-to-go.
1230 * If a reshape is in progress then we might need to
1231 * continue monitoring it. In that case we start
1232 * it read-only and let the grow code make it writable.
1233 */
1234 int rv;
1235 #ifndef MDASSEMBLE
1236 if (content->reshape_active &&
1237 content->delta_disks <= 0)
1238 rv = Grow_continue(mdfd, st, content, backup_file);
1239 else
1240 #endif
1241 rv = ioctl(mdfd, RUN_ARRAY, NULL);
1242 if (rv == 0) {
1243 if (verbose >= 0) {
1244 fprintf(stderr, Name ": %s has been started with %d drive%s",
1245 mddev, okcnt, okcnt==1?"":"s");
1246 if (okcnt < (unsigned)content->array.raid_disks)
1247 fprintf(stderr, " (out of %d)", content->array.raid_disks);
1248 if (rebuilding_cnt)
1249 fprintf(stderr, "%s %d rebuilding", sparecnt?",":" and", rebuilding_cnt);
1250 if (sparecnt)
1251 fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s");
1252 fprintf(stderr, ".\n");
1253 }
1254 if (content->reshape_active &&
1255 content->array.level >= 4 &&
1256 content->array.level <= 6) {
1257 /* might need to increase the size
1258 * of the stripe cache - default is 256
1259 */
1260 if (256 < 4 * (content->array.chunk_size/4096)) {
1261 struct mdinfo *sra = sysfs_read(mdfd, 0, 0);
1262 if (sra)
1263 sysfs_set_num(sra, NULL,
1264 "stripe_cache_size",
1265 (4 * content->array.chunk_size / 4096) + 1);
1266 }
1267 }
1268 if (okcnt < (unsigned)content->array.raid_disks) {
1269 /* If any devices did not get added
1270 * because the kernel rejected them based
1271 * on event count, try adding them
1272 * again providing the action policy is
1273 * 're-add' or greater. The bitmap
1274 * might allow them to be included, or
1275 * they will become spares.
1276 */
1277 for (i = 0; i <= bestcnt; i++) {
1278 int j = best[i];
1279 if (j >= 0 && !devices[j].uptodate) {
1280 if (!disk_action_allows(&devices[j].i, st->ss->name, act_re_add))
1281 continue;
1282 rv = add_disk(mdfd, st, content,
1283 &devices[j].i);
1284 if (rv == 0 && verbose >= 0)
1285 fprintf(stderr,
1286 Name ": %s has been re-added.\n",
1287 devices[j].devname);
1288 }
1289 }
1290 }
1291 wait_for(mddev, mdfd);
1292 close(mdfd);
1293 if (auto_assem) {
1294 int usecs = 1;
1295 /* There is a nasty race with 'mdadm --monitor'.
1296 * If it opens this device before we close it,
1297 * it gets an incomplete open on which IO
1298 * doesn't work and the capacity is
1299 * wrong.
1300 * If we reopen (to check for layered devices)
1301 * before --monitor closes, we loose.
1302 *
1303 * So: wait upto 1 second for there to be
1304 * a non-zero capacity.
1305 */
1306 while (usecs < 1000) {
1307 mdfd = open(mddev, O_RDONLY);
1308 if (mdfd >= 0) {
1309 unsigned long long size;
1310 if (get_dev_size(mdfd, NULL, &size) &&
1311 size > 0)
1312 break;
1313 close(mdfd);
1314 }
1315 usleep(usecs);
1316 usecs <<= 1;
1317 }
1318 }
1319 free(devices);
1320 return 0;
1321 }
1322 fprintf(stderr, Name ": failed to RUN_ARRAY %s: %s\n",
1323 mddev, strerror(errno));
1324
1325 if (!enough(content->array.level, content->array.raid_disks,
1326 content->array.layout, 1, avail, okcnt))
1327 fprintf(stderr, Name ": Not enough devices to "
1328 "start the array.\n");
1329 else if (!enough(content->array.level,
1330 content->array.raid_disks,
1331 content->array.layout, clean,
1332 avail, okcnt))
1333 fprintf(stderr, Name ": Not enough devices to "
1334 "start the array while not clean "
1335 "- consider --force.\n");
1336
1337 if (auto_assem)
1338 ioctl(mdfd, STOP_ARRAY, NULL);
1339 close(mdfd);
1340 free(devices);
1341 return 1;
1342 }
1343 if (runstop == -1) {
1344 fprintf(stderr, Name ": %s assembled from %d drive%s",
1345 mddev, okcnt, okcnt==1?"":"s");
1346 if (okcnt != (unsigned)content->array.raid_disks)
1347 fprintf(stderr, " (out of %d)", content->array.raid_disks);
1348 fprintf(stderr, ", but not started.\n");
1349 close(mdfd);
1350 free(devices);
1351 return 0;
1352 }
1353 if (verbose >= -1) {
1354 fprintf(stderr, Name ": %s assembled from %d drive%s", mddev, okcnt, okcnt==1?"":"s");
1355 if (rebuilding_cnt)
1356 fprintf(stderr, "%s %d rebuilding", sparecnt?", ":" and ", rebuilding_cnt);
1357 if (sparecnt)
1358 fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s");
1359 if (!enough(content->array.level, content->array.raid_disks,
1360 content->array.layout, 1, avail, okcnt))
1361 fprintf(stderr, " - not enough to start the array.\n");
1362 else if (!enough(content->array.level,
1363 content->array.raid_disks,
1364 content->array.layout, clean,
1365 avail, okcnt))
1366 fprintf(stderr, " - not enough to start the "
1367 "array while not clean - consider "
1368 "--force.\n");
1369 else {
1370 if (req_cnt == (unsigned)content->array.raid_disks)
1371 fprintf(stderr, " - need all %d to start it", req_cnt);
1372 else
1373 fprintf(stderr, " - need %d of %d to start", req_cnt, content->array.raid_disks);
1374 fprintf(stderr, " (use --run to insist).\n");
1375 }
1376 }
1377 if (auto_assem)
1378 ioctl(mdfd, STOP_ARRAY, NULL);
1379 close(mdfd);
1380 free(devices);
1381 return 1;
1382 } else {
1383 /* The "chosen_drive" is a good choice, and if necessary, the superblock has
1384 * been updated to point to the current locations of devices.
1385 * so we can just start the array
1386 */
1387 unsigned long dev;
1388 dev = makedev(devices[chosen_drive].i.disk.major,
1389 devices[chosen_drive].i.disk.minor);
1390 if (ioctl(mdfd, START_ARRAY, dev)) {
1391 fprintf(stderr, Name ": Cannot start array: %s\n",
1392 strerror(errno));
1393 }
1394
1395 }
1396 close(mdfd);
1397 free(devices);
1398 return 0;
1399 }
1400
1401 #ifndef MDASSEMBLE
1402 int assemble_container_content(struct supertype *st, int mdfd,
1403 struct mdinfo *content, int runstop,
1404 char *chosen_name, int verbose)
1405 {
1406 struct mdinfo *dev, *sra;
1407 int working = 0, preexist = 0;
1408 struct map_ent *map = NULL;
1409
1410 sysfs_init(content, mdfd, 0);
1411
1412 sra = sysfs_read(mdfd, 0, GET_VERSION);
1413 if (sra == NULL || strcmp(sra->text_version, content->text_version) != 0)
1414 if (sysfs_set_array(content, md_get_version(mdfd)) != 0) {
1415 close(mdfd);
1416 return 1;
1417 }
1418 if (sra)
1419 sysfs_free(sra);
1420
1421 for (dev = content->devs; dev; dev = dev->next)
1422 if (sysfs_add_disk(content, dev, 1) == 0)
1423 working++;
1424 else if (errno == EEXIST)
1425 preexist++;
1426 if (working == 0) {
1427 close(mdfd);
1428 return 1;/* Nothing new, don't try to start */
1429 }
1430
1431 map_update(&map, fd2devnum(mdfd),
1432 content->text_version,
1433 content->uuid, chosen_name);
1434
1435 if (runstop > 0 ||
1436 (working + preexist) >= content->array.working_disks) {
1437 int err;
1438
1439 switch(content->array.level) {
1440 case LEVEL_LINEAR:
1441 case LEVEL_MULTIPATH:
1442 case 0:
1443 err = sysfs_set_str(content, NULL, "array_state",
1444 "active");
1445 break;
1446 default:
1447 err = sysfs_set_str(content, NULL, "array_state",
1448 "readonly");
1449 /* start mdmon if needed. */
1450 if (!err) {
1451 if (!mdmon_running(st->container_dev))
1452 start_mdmon(st->container_dev);
1453 ping_monitor(devnum2devname(st->container_dev));
1454 }
1455 break;
1456 }
1457 if (!err)
1458 sysfs_set_safemode(content, content->safe_mode_delay);
1459 if (verbose >= 0) {
1460 if (err)
1461 fprintf(stderr, Name
1462 ": array %s now has %d devices",
1463 chosen_name, working + preexist);
1464 else
1465 fprintf(stderr, Name
1466 ": Started %s with %d devices",
1467 chosen_name, working + preexist);
1468 if (preexist)
1469 fprintf(stderr, " (%d new)", working);
1470 fprintf(stderr, "\n");
1471 }
1472 if (!err)
1473 wait_for(chosen_name, mdfd);
1474 close(mdfd);
1475 return 0;
1476 /* FIXME should have an O_EXCL and wait for read-auto */
1477 } else {
1478 if (verbose >= 0)
1479 fprintf(stderr, Name
1480 ": %s assembled with %d devices but "
1481 "not started\n",
1482 chosen_name, working);
1483 close(mdfd);
1484 return 1;
1485 }
1486 }
1487 #endif
1488
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