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[thirdparty/mdadm.git] / Assemble.c
1 /*
2 * mdadm - manage Linux "md" devices aka RAID arrays.
3 *
4 * Copyright (C) 2001-2006 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@cse.unsw.edu.au>
23 * Paper: Neil Brown
24 * School of Computer Science and Engineering
25 * The University of New South Wales
26 * Sydney, 2052
27 * Australia
28 */
29
30 #include "mdadm.h"
31
32 static int name_matches(char *found, char *required, char *homehost)
33 {
34 /* See if the name found matches the required name, possibly
35 * prefixed with 'homehost'
36 */
37 char fnd[33];
38
39 strncpy(fnd, found, 32);
40 fnd[32] = 0;
41 if (strcmp(found, required)==0)
42 return 1;
43 if (homehost) {
44 int l = strlen(homehost);
45 if (l < 32 && fnd[l] == ':' &&
46 strcmp(fnd+l+1, required)==0)
47 return 1;
48 }
49 return 0;
50 }
51
52 int Assemble(struct supertype *st, char *mddev, int mdfd,
53 mddev_ident_t ident, char *conffile,
54 mddev_dev_t devlist, char *backup_file,
55 int readonly, int runstop,
56 char *update, char *homehost,
57 int verbose, int force)
58 {
59 /*
60 * The task of Assemble is to find a collection of
61 * devices that should (according to their superblocks)
62 * form an array, and to give this collection to the MD driver.
63 * In Linux-2.4 and later, this involves submitting a
64 * SET_ARRAY_INFO ioctl with no arg - to prepare
65 * the array - and then submit a number of
66 * ADD_NEW_DISK ioctls to add disks into
67 * the array. Finally RUN_ARRAY might
68 * be submitted to start the array.
69 *
70 * Much of the work of Assemble is in finding and/or
71 * checking the disks to make sure they look right.
72 *
73 * If mddev is not set, then scan must be set and we
74 * read through the config file for dev+uuid mapping
75 * We recurse, setting mddev, for each device that
76 * - isn't running
77 * - has a valid uuid (or any uuid if !uuidset)
78 *
79 * If mddev is set, we try to determine state of md.
80 * check version - must be at least 0.90.0
81 * check kernel version. must be at least 2.4.
82 * If not, we can possibly fall back on START_ARRAY
83 * Try to GET_ARRAY_INFO.
84 * If possible, give up
85 * If not, try to STOP_ARRAY just to make sure
86 *
87 * If !uuidset and scan, look in conf-file for uuid
88 * If not found, give up
89 * If !devlist and scan and uuidset, get list of devs from conf-file
90 *
91 * For each device:
92 * Check superblock - discard if bad
93 * Check uuid (set if we don't have one) - discard if no match
94 * Check superblock similarity if we have a superblock - discard if different
95 * Record events, devicenum
96 * This should give us a list of devices for the array
97 * We should collect the most recent event number
98 *
99 * Count disks with recent enough event count
100 * While force && !enough disks
101 * Choose newest rejected disks, update event count
102 * mark clean and rewrite superblock
103 * If recent kernel:
104 * SET_ARRAY_INFO
105 * foreach device with recent events : ADD_NEW_DISK
106 * if runstop == 1 || "enough" disks and runstop==0 -> RUN_ARRAY
107 * If old kernel:
108 * Check the device numbers in superblock are right
109 * update superblock if any changes
110 * START_ARRAY
111 *
112 */
113 int old_linux = 0;
114 int vers;
115 void *first_super = NULL, *super = NULL;
116 struct {
117 char *devname;
118 unsigned int major, minor;
119 unsigned int oldmajor, oldminor;
120 long long events;
121 int uptodate;
122 int state;
123 int raid_disk;
124 int disk_nr;
125 } *devices;
126 int *best = NULL; /* indexed by raid_disk */
127 unsigned int bestcnt = 0;
128 int devcnt = 0;
129 unsigned int okcnt, sparecnt;
130 unsigned int req_cnt;
131 unsigned int i;
132 int most_recent = 0;
133 int chosen_drive;
134 int change = 0;
135 int inargv = 0;
136 int start_partial_ok = (runstop >= 0) && (force || devlist==NULL);
137 unsigned int num_devs;
138 mddev_dev_t tmpdev;
139 struct mdinfo info;
140 char *avail;
141 int nextspare = 0;
142
143 vers = md_get_version(mdfd);
144 if (vers <= 0) {
145 fprintf(stderr, Name ": %s appears not to be an md device.\n", mddev);
146 return 1;
147 }
148 if (vers < 9000) {
149 fprintf(stderr, Name ": Assemble requires driver version 0.90.0 or later.\n"
150 " Upgrade your kernel or try --build\n");
151 return 1;
152 }
153 if (get_linux_version() < 2004000)
154 old_linux = 1;
155
156 if (ioctl(mdfd, GET_ARRAY_INFO, &info.array)>=0) {
157 fprintf(stderr, Name ": device %s already active - cannot assemble it\n",
158 mddev);
159 return 1;
160 }
161 ioctl(mdfd, STOP_ARRAY, NULL); /* just incase it was started but has no content */
162
163 /*
164 * If any subdevs are listed, then any that don't
165 * match ident are discarded. Remainder must all match and
166 * become the array.
167 * If no subdevs, then we scan all devices in the config file, but
168 * there must be something in the identity
169 */
170
171 if (!devlist &&
172 ident->uuid_set == 0 &&
173 ident->super_minor < 0 &&
174 ident->devices == NULL) {
175 fprintf(stderr, Name ": No identity information available for %s - cannot assemble.\n",
176 mddev);
177 return 1;
178 }
179 if (devlist == NULL)
180 devlist = conf_get_devs(conffile);
181 else inargv = 1;
182
183 tmpdev = devlist; num_devs = 0;
184 while (tmpdev) {
185 num_devs++;
186 tmpdev = tmpdev->next;
187 }
188 devices = malloc(num_devs * sizeof(*devices));
189
190 if (!st && ident->st) st = ident->st;
191
192 if (verbose>0)
193 fprintf(stderr, Name ": looking for devices for %s\n",
194 mddev);
195
196 /* first walk the list of devices to find a consistent set
197 * that match the criterea, if that is possible.
198 * We flag the one we like with 'used'.
199 */
200 for (tmpdev = devlist;
201 tmpdev;
202 tmpdev = tmpdev->next) {
203 char *devname = tmpdev->devname;
204 int dfd;
205 struct stat stb;
206 struct supertype *tst = st;
207
208 if (ident->devices &&
209 !match_oneof(ident->devices, devname)) {
210 if ((inargv && verbose>=0) || verbose > 0)
211 fprintf(stderr, Name ": %s is not one of %s\n", devname, ident->devices);
212 continue;
213 }
214
215 if (super) {
216 free(super);
217 super = NULL;
218 }
219
220 dfd = dev_open(devname, O_RDONLY|O_EXCL);
221 if (dfd < 0) {
222 if ((inargv && verbose >= 0) || verbose > 0)
223 fprintf(stderr, Name ": cannot open device %s: %s\n",
224 devname, strerror(errno));
225 } else if (fstat(dfd, &stb)< 0) {
226 /* Impossible! */
227 fprintf(stderr, Name ": fstat failed for %s: %s\n",
228 devname, strerror(errno));
229 } else if ((stb.st_mode & S_IFMT) != S_IFBLK) {
230 fprintf(stderr, Name ": %s is not a block device.\n",
231 devname);
232 } else if (!tst && (tst = guess_super(dfd)) == NULL) {
233 if ((inargv && verbose >= 0) || verbose > 0)
234 fprintf(stderr, Name ": no recogniseable superblock\n");
235 } else if (tst->ss->load_super(tst,dfd, &super, NULL)) {
236 if ((inargv && verbose >= 0) || verbose > 0)
237 fprintf( stderr, Name ": no RAID superblock on %s\n",
238 devname);
239 } else {
240 tst->ss->getinfo_super(&info, super);
241 }
242 if (dfd >= 0) close(dfd);
243
244 if (ident->uuid_set && (!update || strcmp(update, "uuid")!= 0) &&
245 (!super || same_uuid(info.uuid, ident->uuid, tst->ss->swapuuid)==0)) {
246 if ((inargv && verbose >= 0) || verbose > 0)
247 fprintf(stderr, Name ": %s has wrong uuid.\n",
248 devname);
249 continue;
250 }
251 if (ident->name[0] && (!update || strcmp(update, "name")!= 0) &&
252 (!super || name_matches(info.name, ident->name, homehost)==0)) {
253 if ((inargv && verbose >= 0) || verbose > 0)
254 fprintf(stderr, Name ": %s has wrong name.\n",
255 devname);
256 continue;
257 }
258 if (ident->super_minor != UnSet &&
259 (!super || ident->super_minor != info.array.md_minor)) {
260 if ((inargv && verbose >= 0) || verbose > 0)
261 fprintf(stderr, Name ": %s has wrong super-minor.\n",
262 devname);
263 continue;
264 }
265 if (ident->level != UnSet &&
266 (!super|| ident->level != info.array.level)) {
267 if ((inargv && verbose >= 0) || verbose > 0)
268 fprintf(stderr, Name ": %s has wrong raid level.\n",
269 devname);
270 continue;
271 }
272 if (ident->raid_disks != UnSet &&
273 (!super || ident->raid_disks!= info.array.raid_disks)) {
274 if ((inargv && verbose >= 0) || verbose > 0)
275 fprintf(stderr, Name ": %s requires wrong number of drives.\n",
276 devname);
277 continue;
278 }
279
280 /* If we are this far, then we are nearly commited to this device.
281 * If the super_block doesn't exist, or doesn't match others,
282 * then we probably cannot continue
283 * However if one of the arrays is for the homehost, and
284 * the other isn't that can disambiguate.
285 */
286
287 if (!super) {
288 fprintf(stderr, Name ": %s has no superblock - assembly aborted\n",
289 devname);
290 free(first_super);
291 return 1;
292 }
293
294 if (st == NULL)
295 st = tst;
296 if (st->ss != tst->ss ||
297 st->minor_version != tst->minor_version ||
298 st->ss->compare_super(&first_super, super) != 0) {
299 /* Some mismatch. If exactly one array matches this host,
300 * we can resolve on that one
301 */
302 if (homehost) {
303 int first = st->ss->match_home(first_super, homehost);
304 int last = tst->ss->match_home(super, homehost);
305 if (first+last == 1) {
306 /* We can do something */
307 if (first) {/* just ignore this one */
308 if ((inargv && verbose >= 0) || verbose > 0)
309 fprintf(stderr, Name ": %s misses out due to wrong homehost\n",
310 devname);
311 continue;
312 } else { /* reject all those sofar */
313 mddev_dev_t td;
314 if ((inargv && verbose >= 0) || verbose > 0)
315 fprintf(stderr, Name ": %s overrides previous devices due to good homehost\n",
316 devname);
317 for (td=devlist; td != tmpdev; td=td->next)
318 if (td->used == 1)
319 td->used = 0;
320 tmpdev->used = 1;
321 continue;
322 }
323 }
324 }
325 fprintf(stderr, Name ": superblock on %s doesn't match others - assembly aborted\n",
326 devname);
327 free(super);
328 free(first_super);
329 return 1;
330 }
331
332 tmpdev->used = 1;
333 }
334
335 /* Ok, no bad inconsistancy, we can try updating etc */
336 for (tmpdev = devlist; tmpdev; tmpdev=tmpdev->next) if (tmpdev->used) {
337 char *devname = tmpdev->devname;
338 struct stat stb;
339 /* looks like a good enough match to update the super block if needed */
340 if (update) {
341 int dfd;
342 /* prepare useful information in info structures */
343 struct stat stb2;
344 fstat(mdfd, &stb2);
345
346 if (strcmp(update, "uuid")==0 &&
347 !ident->uuid_set) {
348 int rfd;
349 if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
350 read(rfd, ident->uuid, 16) != 16) {
351 *(__u32*)(ident->uuid) = random();
352 *(__u32*)(ident->uuid+1) = random();
353 *(__u32*)(ident->uuid+2) = random();
354 *(__u32*)(ident->uuid+3) = random();
355 }
356 if (rfd >= 0) close(rfd);
357 }
358 dfd = dev_open(devname, O_RDWR|O_EXCL);
359
360 if (super) {
361 free(super);
362 super = NULL;
363 }
364
365 st->ss->load_super(st, dfd, &super, NULL);
366 st->ss->getinfo_super(&info, super);
367
368 memcpy(info.uuid, ident->uuid, 16);
369 strcpy(info.name, ident->name);
370 info.array.md_minor = minor(stb2.st_rdev);
371
372 st->ss->update_super(&info, super, update, devname, verbose,
373 ident->uuid_set, homehost);
374 if (strcmp(update, "uuid")==0 &&
375 !ident->uuid_set) {
376 ident->uuid_set = 1;
377 memcpy(ident->uuid, info.uuid, 16);
378 }
379 if (dfd < 0)
380 fprintf(stderr, Name ": Cannot open %s for superblock update\n",
381 devname);
382 else if (st->ss->store_super(st, dfd, super))
383 fprintf(stderr, Name ": Could not re-write superblock on %s.\n",
384 devname);
385 if (dfd >= 0)
386 close(dfd);
387
388 if (strcmp(update, "uuid")==0 &&
389 ident->bitmap_fd)
390 bitmap_update_uuid(ident->bitmap_fd, info.uuid);
391 }
392
393 stat(devname, &stb);
394
395 if (verbose > 0)
396 fprintf(stderr, Name ": %s is identified as a member of %s, slot %d.\n",
397 devname, mddev, info.disk.raid_disk);
398 devices[devcnt].devname = devname;
399 devices[devcnt].major = major(stb.st_rdev);
400 devices[devcnt].minor = minor(stb.st_rdev);
401 devices[devcnt].oldmajor = info.disk.major;
402 devices[devcnt].oldminor = info.disk.minor;
403 devices[devcnt].events = info.events;
404 devices[devcnt].raid_disk = info.disk.raid_disk;
405 devices[devcnt].disk_nr = info.disk.number;
406 devices[devcnt].uptodate = 0;
407 devices[devcnt].state = info.disk.state;
408 if (most_recent < devcnt) {
409 if (devices[devcnt].events
410 > devices[most_recent].events)
411 most_recent = devcnt;
412 }
413 if (info.array.level == -4)
414 /* with multipath, the raid_disk from the superblock is meaningless */
415 i = devcnt;
416 else
417 i = devices[devcnt].raid_disk;
418 if (i+1 == 0) {
419 if (nextspare < info.array.raid_disks)
420 nextspare = info.array.raid_disks;
421 i = nextspare++;
422 }
423 if (i < 10000) {
424 if (i >= bestcnt) {
425 unsigned int newbestcnt = i+10;
426 int *newbest = malloc(sizeof(int)*newbestcnt);
427 unsigned int c;
428 for (c=0; c < newbestcnt; c++)
429 if (c < bestcnt)
430 newbest[c] = best[c];
431 else
432 newbest[c] = -1;
433 if (best)free(best);
434 best = newbest;
435 bestcnt = newbestcnt;
436 }
437 if (best[i] == -1
438 || devices[best[i]].events < devices[devcnt].events)
439 best[i] = devcnt;
440 }
441 devcnt++;
442 }
443
444 if (super)
445 free(super);
446 super = NULL;
447
448 if (update && strcmp(update, "byteorder")==0)
449 st->minor_version = 90;
450
451 if (devcnt == 0) {
452 fprintf(stderr, Name ": no devices found for %s\n",
453 mddev);
454 free(first_super);
455 return 1;
456 }
457
458 st->ss->getinfo_super(&info, first_super);
459
460 /* now we have some devices that might be suitable.
461 * I wonder how many
462 */
463 avail = malloc(info.array.raid_disks);
464 memset(avail, 0, info.array.raid_disks);
465 okcnt = 0;
466 sparecnt=0;
467 for (i=0; i< bestcnt ;i++) {
468 int j = best[i];
469 int event_margin = 1; /* always allow a difference of '1'
470 * like the kernel does
471 */
472 if (j < 0) continue;
473 /* note: we ignore error flags in multipath arrays
474 * as they don't make sense
475 */
476 if (info.array.level != -4)
477 if (!(devices[j].state & (1<<MD_DISK_SYNC))) {
478 if (!(devices[j].state & (1<<MD_DISK_FAULTY)))
479 sparecnt++;
480 continue;
481 }
482 if (devices[j].events+event_margin >=
483 devices[most_recent].events) {
484 devices[j].uptodate = 1;
485 if (i < info.array.raid_disks) {
486 okcnt++;
487 avail[i]=1;
488 } else
489 sparecnt++;
490 }
491 }
492 while (force && !enough(info.array.level, info.array.raid_disks,
493 info.array.layout,
494 avail, okcnt)) {
495 /* Choose the newest best drive which is
496 * not up-to-date, update the superblock
497 * and add it.
498 */
499 int fd;
500 chosen_drive = -1;
501 for (i=0; i<info.array.raid_disks && i < bestcnt; i++) {
502 int j = best[i];
503 if (j>=0 &&
504 !devices[j].uptodate &&
505 devices[j].events > 0 &&
506 (chosen_drive < 0 ||
507 devices[j].events > devices[chosen_drive].events))
508 chosen_drive = j;
509 }
510 if (chosen_drive < 0)
511 break;
512 if (verbose >= 0)
513 fprintf(stderr, Name ": forcing event count in %s(%d) from %d upto %d\n",
514 devices[chosen_drive].devname, devices[chosen_drive].raid_disk,
515 (int)(devices[chosen_drive].events),
516 (int)(devices[most_recent].events));
517 fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL);
518 if (fd < 0) {
519 fprintf(stderr, Name ": Couldn't open %s for write - not updating\n",
520 devices[chosen_drive].devname);
521 devices[chosen_drive].events = 0;
522 continue;
523 }
524 if (st->ss->load_super(st,fd, &super, NULL)) {
525 close(fd);
526 fprintf(stderr, Name ": RAID superblock disappeared from %s - not updating.\n",
527 devices[chosen_drive].devname);
528 devices[chosen_drive].events = 0;
529 continue;
530 }
531 info.events = devices[most_recent].events;
532 st->ss->update_super(&info, super, "force", devices[chosen_drive].devname, verbose, 0, NULL);
533
534 if (st->ss->store_super(st, fd, super)) {
535 close(fd);
536 fprintf(stderr, Name ": Could not re-write superblock on %s\n",
537 devices[chosen_drive].devname);
538 devices[chosen_drive].events = 0;
539 free(super);
540 continue;
541 }
542 close(fd);
543 devices[chosen_drive].events = devices[most_recent].events;
544 devices[chosen_drive].uptodate = 1;
545 avail[chosen_drive] = 1;
546 okcnt++;
547 free(super);
548 }
549
550 /* Now we want to look at the superblock which the kernel will base things on
551 * and compare the devices that we think are working with the devices that the
552 * superblock thinks are working.
553 * If there are differences and --force is given, then update this chosen
554 * superblock.
555 */
556 chosen_drive = -1;
557 super = NULL;
558 for (i=0; chosen_drive < 0 && i<bestcnt; i++) {
559 int j = best[i];
560 int fd;
561
562 if (j<0)
563 continue;
564 if (!devices[j].uptodate)
565 continue;
566 chosen_drive = j;
567 if ((fd=dev_open(devices[j].devname, O_RDONLY|O_EXCL))< 0) {
568 fprintf(stderr, Name ": Cannot open %s: %s\n",
569 devices[j].devname, strerror(errno));
570 return 1;
571 }
572 if (st->ss->load_super(st,fd, &super, NULL)) {
573 close(fd);
574 fprintf(stderr, Name ": RAID superblock has disappeared from %s\n",
575 devices[j].devname);
576 return 1;
577 }
578 close(fd);
579 }
580 if (super == NULL) {
581 fprintf(stderr, Name ": No suitable drives found for %s\n", mddev);
582 return 1;
583 }
584 st->ss->getinfo_super(&info, super);
585 for (i=0; i<bestcnt; i++) {
586 int j = best[i];
587 unsigned int desired_state;
588
589 if (i < info.array.raid_disks)
590 desired_state = (1<<MD_DISK_ACTIVE) | (1<<MD_DISK_SYNC);
591 else
592 desired_state = 0;
593
594 if (j<0)
595 continue;
596 if (!devices[j].uptodate)
597 continue;
598 info.disk.number = devices[j].disk_nr;
599 info.disk.raid_disk = i;
600 info.disk.state = desired_state;
601
602 if (devices[j].uptodate &&
603 st->ss->update_super(&info, super, "assemble", NULL, verbose, 0, NULL)) {
604 if (force) {
605 if (verbose >= 0)
606 fprintf(stderr, Name ": "
607 "clearing FAULTY flag for device %d in %s for %s\n",
608 j, mddev, devices[j].devname);
609 change = 1;
610 } else {
611 if (verbose >= -1)
612 fprintf(stderr, Name ": "
613 "device %d in %s has wrong state in superblock, but %s seems ok\n",
614 i, mddev, devices[j].devname);
615 }
616 }
617 #if 0
618 if (!devices[j].uptodate &&
619 !(super.disks[i].state & (1 << MD_DISK_FAULTY))) {
620 fprintf(stderr, Name ": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n",
621 i, mddev);
622 }
623 #endif
624 }
625 if (force && okcnt == info.array.raid_disks-1) {
626 /* FIXME check event count */
627 change += st->ss->update_super(&info, super, "force",
628 devices[chosen_drive].devname, verbose, 0, NULL);
629 }
630
631 if (change) {
632 int fd;
633 fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL);
634 if (fd < 0) {
635 fprintf(stderr, Name ": Could not open %s for write - cannot Assemble array.\n",
636 devices[chosen_drive].devname);
637 return 1;
638 }
639 if (st->ss->store_super(st, fd, super)) {
640 close(fd);
641 fprintf(stderr, Name ": Could not re-write superblock on %s\n",
642 devices[chosen_drive].devname);
643 return 1;
644 }
645 close(fd);
646 }
647
648 /* If we are in the middle of a reshape we may need to restore saved data
649 * that was moved aside due to the reshape overwriting live data
650 * The code of doing this lives in Grow.c
651 */
652 #ifndef MDASSEMBLE
653 if (info.reshape_active) {
654 int err = 0;
655 int *fdlist = malloc(sizeof(int)* bestcnt);
656 for (i=0; i<bestcnt; i++) {
657 int j = best[i];
658 if (j >= 0) {
659 fdlist[i] = dev_open(devices[j].devname, O_RDWR|O_EXCL);
660 if (fdlist[i] < 0) {
661 fprintf(stderr, Name ": Could not open %s for write - cannot Assemble array.\n",
662 devices[j].devname);
663 err = 1;
664 break;
665 }
666 } else
667 fdlist[i] = -1;
668 }
669 if (!err)
670 err = Grow_restart(st, &info, fdlist, bestcnt, backup_file);
671 while (i>0) {
672 i--;
673 if (fdlist[i]>=0) close(fdlist[i]);
674 }
675 if (err) {
676 fprintf(stderr, Name ": Failed to restore critical section for reshape, sorry.\n");
677 return err;
678 }
679 }
680 #endif
681 /* count number of in-sync devices according to the superblock.
682 * We must have this number to start the array without -s or -R
683 */
684 req_cnt = info.array.working_disks;
685
686 /* Almost ready to actually *do* something */
687 if (!old_linux) {
688 int rv;
689 if ((vers % 100) >= 1) { /* can use different versions */
690 mdu_array_info_t inf;
691 memset(&inf, 0, sizeof(inf));
692 inf.major_version = st->ss->major;
693 inf.minor_version = st->minor_version;
694 rv = ioctl(mdfd, SET_ARRAY_INFO, &inf);
695 } else
696 rv = ioctl(mdfd, SET_ARRAY_INFO, NULL);
697
698 if (rv) {
699 fprintf(stderr, Name ": SET_ARRAY_INFO failed for %s: %s\n",
700 mddev, strerror(errno));
701 return 1;
702 }
703 if (ident->bitmap_fd >= 0) {
704 if (ioctl(mdfd, SET_BITMAP_FILE, ident->bitmap_fd) != 0) {
705 fprintf(stderr, Name ": SET_BITMAP_FILE failed.\n");
706 return 1;
707 }
708 } else if (ident->bitmap_file) {
709 /* From config file */
710 int bmfd = open(ident->bitmap_file, O_RDWR);
711 if (bmfd < 0) {
712 fprintf(stderr, Name ": Could not open bitmap file %s\n",
713 ident->bitmap_file);
714 return 1;
715 }
716 if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) {
717 fprintf(stderr, Name ": Failed to set bitmapfile for %s\n", mddev);
718 close(bmfd);
719 return 1;
720 }
721 close(bmfd);
722 }
723
724 /* First, add the raid disks, but add the chosen one last */
725 for (i=0; i<= bestcnt; i++) {
726 int j;
727 if (i < bestcnt) {
728 j = best[i];
729 if (j == chosen_drive)
730 continue;
731 } else
732 j = chosen_drive;
733
734 if (j >= 0 /* && devices[j].uptodate */) {
735 mdu_disk_info_t disk;
736 memset(&disk, 0, sizeof(disk));
737 disk.major = devices[j].major;
738 disk.minor = devices[j].minor;
739 if (ioctl(mdfd, ADD_NEW_DISK, &disk)!=0) {
740 fprintf(stderr, Name ": failed to add %s to %s: %s\n",
741 devices[j].devname,
742 mddev,
743 strerror(errno));
744 if (i < info.array.raid_disks || i == bestcnt)
745 okcnt--;
746 else
747 sparecnt--;
748 } else if (verbose > 0)
749 fprintf(stderr, Name ": added %s to %s as %d\n",
750 devices[j].devname, mddev, devices[j].raid_disk);
751 } else if (verbose > 0 && i < info.array.raid_disks)
752 fprintf(stderr, Name ": no uptodate device for slot %d of %s\n",
753 i, mddev);
754 }
755
756 if (runstop == 1 ||
757 (runstop <= 0 &&
758 ( enough(info.array.level, info.array.raid_disks, info.array.layout, avail, okcnt) &&
759 (okcnt >= req_cnt || start_partial_ok)
760 ))) {
761 if (ioctl(mdfd, RUN_ARRAY, NULL)==0) {
762 if (verbose >= 0) {
763 fprintf(stderr, Name ": %s has been started with %d drive%s",
764 mddev, okcnt, okcnt==1?"":"s");
765 if (okcnt < info.array.raid_disks)
766 fprintf(stderr, " (out of %d)", info.array.raid_disks);
767 if (sparecnt)
768 fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s");
769 fprintf(stderr, ".\n");
770 }
771 return 0;
772 }
773 fprintf(stderr, Name ": failed to RUN_ARRAY %s: %s\n",
774 mddev, strerror(errno));
775 return 1;
776 }
777 if (runstop == -1) {
778 fprintf(stderr, Name ": %s assembled from %d drive%s",
779 mddev, okcnt, okcnt==1?"":"s");
780 if (okcnt != info.array.raid_disks)
781 fprintf(stderr, " (out of %d)", info.array.raid_disks);
782 fprintf(stderr, ", but not started.\n");
783 return 0;
784 }
785 if (verbose >= 0) {
786 fprintf(stderr, Name ": %s assembled from %d drive%s", mddev, okcnt, okcnt==1?"":"s");
787 if (sparecnt)
788 fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s");
789 if (!enough(info.array.level, info.array.raid_disks, info.array.layout, avail, okcnt))
790 fprintf(stderr, " - not enough to start the array.\n");
791 else {
792 if (req_cnt == info.array.raid_disks)
793 fprintf(stderr, " - need all %d to start it", req_cnt);
794 else
795 fprintf(stderr, " - need %d of %d to start", req_cnt, info.array.raid_disks);
796 fprintf(stderr, " (use --run to insist).\n");
797 }
798 }
799 return 1;
800 } else {
801 /* The "chosen_drive" is a good choice, and if necessary, the superblock has
802 * been updated to point to the current locations of devices.
803 * so we can just start the array
804 */
805 unsigned long dev;
806 dev = makedev(devices[chosen_drive].major,
807 devices[chosen_drive].minor);
808 if (ioctl(mdfd, START_ARRAY, dev)) {
809 fprintf(stderr, Name ": Cannot start array: %s\n",
810 strerror(errno));
811 }
812
813 }
814 return 0;
815 }
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