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Allow autoassembly to choose it's own name for the array.
[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 if (get_linux_version() < 2004000)
144 old_linux = 1;
145
146 if (mdfd >= 0) {
147 vers = md_get_version(mdfd);
148 if (vers <= 0) {
149 fprintf(stderr, Name ": %s appears not to be an md device.\n", mddev);
150 return 1;
151 }
152 if (vers < 9000) {
153 fprintf(stderr, Name ": Assemble requires driver version 0.90.0 or later.\n"
154 " Upgrade your kernel or try --build\n");
155 return 1;
156 }
157
158 if (ioctl(mdfd, GET_ARRAY_INFO, &info.array)>=0) {
159 fprintf(stderr, Name ": device %s already active - cannot assemble it\n",
160 mddev);
161 return 1;
162 }
163 ioctl(mdfd, STOP_ARRAY, NULL); /* just incase it was started but has no content */
164 }
165 /*
166 * If any subdevs are listed, then any that don't
167 * match ident are discarded. Remainder must all match and
168 * become the array.
169 * If no subdevs, then we scan all devices in the config file, but
170 * there must be something in the identity
171 */
172
173 if (!devlist &&
174 ident->uuid_set == 0 &&
175 ident->super_minor < 0 &&
176 ident->devices == NULL) {
177 fprintf(stderr, Name ": No identity information available for %s - cannot assemble.\n",
178 mddev ? mddev : "further assembly");
179 return 1;
180 }
181 if (devlist == NULL)
182 devlist = conf_get_devs(conffile);
183 else inargv = 1;
184
185 tmpdev = devlist; num_devs = 0;
186 while (tmpdev) {
187 num_devs++;
188 tmpdev = tmpdev->next;
189 }
190 devices = malloc(num_devs * sizeof(*devices));
191
192 if (!st && ident->st) st = ident->st;
193
194 if (verbose>0)
195 fprintf(stderr, Name ": looking for devices for %s\n",
196 mddev ? mddev : "further assembly");
197
198 /* first walk the list of devices to find a consistent set
199 * that match the criterea, if that is possible.
200 * We flag the one we like with 'used'.
201 */
202 for (tmpdev = devlist;
203 tmpdev;
204 tmpdev = tmpdev->next) {
205 char *devname = tmpdev->devname;
206 int dfd;
207 struct stat stb;
208 struct supertype *tst = st;
209
210 if (ident->devices &&
211 !match_oneof(ident->devices, devname)) {
212 if ((inargv && verbose>=0) || verbose > 0)
213 fprintf(stderr, Name ": %s is not one of %s\n", devname, ident->devices);
214 continue;
215 }
216
217 if (super) {
218 free(super);
219 super = NULL;
220 }
221
222 dfd = dev_open(devname, O_RDONLY|O_EXCL);
223 if (dfd < 0) {
224 if ((inargv && verbose >= 0) || verbose > 0)
225 fprintf(stderr, Name ": cannot open device %s: %s\n",
226 devname, strerror(errno));
227 } else if (fstat(dfd, &stb)< 0) {
228 /* Impossible! */
229 fprintf(stderr, Name ": fstat failed for %s: %s\n",
230 devname, strerror(errno));
231 } else if ((stb.st_mode & S_IFMT) != S_IFBLK) {
232 fprintf(stderr, Name ": %s is not a block device.\n",
233 devname);
234 } else if (!tst && (tst = guess_super(dfd)) == NULL) {
235 if ((inargv && verbose >= 0) || verbose > 0)
236 fprintf(stderr, Name ": no recogniseable superblock\n");
237 } else if (tst->ss->load_super(tst,dfd, &super, NULL)) {
238 if ((inargv && verbose >= 0) || verbose > 0)
239 fprintf( stderr, Name ": no RAID superblock on %s\n",
240 devname);
241 } else {
242 tst->ss->getinfo_super(&info, super);
243 }
244 if (dfd >= 0) close(dfd);
245
246 if (ident->uuid_set && (!update || strcmp(update, "uuid")!= 0) &&
247 (!super || same_uuid(info.uuid, ident->uuid, tst->ss->swapuuid)==0)) {
248 if ((inargv && verbose >= 0) || verbose > 0)
249 fprintf(stderr, Name ": %s has wrong uuid.\n",
250 devname);
251 continue;
252 }
253 if (ident->name[0] && (!update || strcmp(update, "name")!= 0) &&
254 (!super || name_matches(info.name, ident->name, homehost)==0)) {
255 if ((inargv && verbose >= 0) || verbose > 0)
256 fprintf(stderr, Name ": %s has wrong name.\n",
257 devname);
258 continue;
259 }
260 if (ident->super_minor != UnSet &&
261 (!super || ident->super_minor != info.array.md_minor)) {
262 if ((inargv && verbose >= 0) || verbose > 0)
263 fprintf(stderr, Name ": %s has wrong super-minor.\n",
264 devname);
265 continue;
266 }
267 if (ident->level != UnSet &&
268 (!super|| ident->level != info.array.level)) {
269 if ((inargv && verbose >= 0) || verbose > 0)
270 fprintf(stderr, Name ": %s has wrong raid level.\n",
271 devname);
272 continue;
273 }
274 if (ident->raid_disks != UnSet &&
275 (!super || ident->raid_disks!= info.array.raid_disks)) {
276 if ((inargv && verbose >= 0) || verbose > 0)
277 fprintf(stderr, Name ": %s requires wrong number of drives.\n",
278 devname);
279 continue;
280 }
281
282 /* If we are this far, then we are nearly commited to this device.
283 * If the super_block doesn't exist, or doesn't match others,
284 * then we probably cannot continue
285 * However if one of the arrays is for the homehost, and
286 * the other isn't that can disambiguate.
287 */
288
289 if (!super) {
290 fprintf(stderr, Name ": %s has no superblock - assembly aborted\n",
291 devname);
292 free(first_super);
293 return 1;
294 }
295
296 if (st == NULL)
297 st = tst;
298 if (st->ss != tst->ss ||
299 st->minor_version != tst->minor_version ||
300 st->ss->compare_super(&first_super, super) != 0) {
301 /* Some mismatch. If exactly one array matches this host,
302 * we can resolve on that one
303 */
304 if (homehost) {
305 int first = st->ss->match_home(first_super, homehost);
306 int last = tst->ss->match_home(super, homehost);
307 if (first+last == 1) {
308 /* We can do something */
309 if (first) {/* just ignore this one */
310 if ((inargv && verbose >= 0) || verbose > 0)
311 fprintf(stderr, Name ": %s misses out due to wrong homehost\n",
312 devname);
313 continue;
314 } else { /* reject all those sofar */
315 mddev_dev_t td;
316 if ((inargv && verbose >= 0) || verbose > 0)
317 fprintf(stderr, Name ": %s overrides previous devices due to good homehost\n",
318 devname);
319 for (td=devlist; td != tmpdev; td=td->next)
320 if (td->used == 1)
321 td->used = 0;
322 tmpdev->used = 1;
323 continue;
324 }
325 }
326 }
327 fprintf(stderr, Name ": superblock on %s doesn't match others - assembly aborted\n",
328 devname);
329 free(super);
330 free(first_super);
331 return 1;
332 }
333
334 tmpdev->used = 1;
335 }
336
337 if (mdfd < 0) {
338 /* So... it is up to me to open the device.
339 * We create a name '/dev/md/XXX' based on the info in the
340 * superblock, and call open_mddev on that
341 */
342 asprintf(&mddev, "/dev/md/%s", info.name);
343 mdfd = open_mddev(mddev, 0);
344 if (mdfd < 0)
345 return mdfd;
346 }
347
348 /* Ok, no bad inconsistancy, we can try updating etc */
349 for (tmpdev = devlist; tmpdev; tmpdev=tmpdev->next) if (tmpdev->used) {
350 char *devname = tmpdev->devname;
351 struct stat stb;
352 /* looks like a good enough match to update the super block if needed */
353 if (update) {
354 int dfd;
355 /* prepare useful information in info structures */
356 struct stat stb2;
357 fstat(mdfd, &stb2);
358
359 if (strcmp(update, "uuid")==0 &&
360 !ident->uuid_set) {
361 int rfd;
362 if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
363 read(rfd, ident->uuid, 16) != 16) {
364 *(__u32*)(ident->uuid) = random();
365 *(__u32*)(ident->uuid+1) = random();
366 *(__u32*)(ident->uuid+2) = random();
367 *(__u32*)(ident->uuid+3) = random();
368 }
369 if (rfd >= 0) close(rfd);
370 }
371 dfd = dev_open(devname, O_RDWR|O_EXCL);
372
373 if (super) {
374 free(super);
375 super = NULL;
376 }
377
378 st->ss->load_super(st, dfd, &super, NULL);
379 st->ss->getinfo_super(&info, super);
380
381 memcpy(info.uuid, ident->uuid, 16);
382 strcpy(info.name, ident->name);
383 info.array.md_minor = minor(stb2.st_rdev);
384
385 st->ss->update_super(&info, super, update, devname, verbose,
386 ident->uuid_set, homehost);
387 if (strcmp(update, "uuid")==0 &&
388 !ident->uuid_set) {
389 ident->uuid_set = 1;
390 memcpy(ident->uuid, info.uuid, 16);
391 }
392 if (dfd < 0)
393 fprintf(stderr, Name ": Cannot open %s for superblock update\n",
394 devname);
395 else if (st->ss->store_super(st, dfd, super))
396 fprintf(stderr, Name ": Could not re-write superblock on %s.\n",
397 devname);
398 if (dfd >= 0)
399 close(dfd);
400
401 if (strcmp(update, "uuid")==0 &&
402 ident->bitmap_fd)
403 bitmap_update_uuid(ident->bitmap_fd, info.uuid);
404 }
405
406 stat(devname, &stb);
407
408 if (verbose > 0)
409 fprintf(stderr, Name ": %s is identified as a member of %s, slot %d.\n",
410 devname, mddev, info.disk.raid_disk);
411 devices[devcnt].devname = devname;
412 devices[devcnt].major = major(stb.st_rdev);
413 devices[devcnt].minor = minor(stb.st_rdev);
414 devices[devcnt].oldmajor = info.disk.major;
415 devices[devcnt].oldminor = info.disk.minor;
416 devices[devcnt].events = info.events;
417 devices[devcnt].raid_disk = info.disk.raid_disk;
418 devices[devcnt].disk_nr = info.disk.number;
419 devices[devcnt].uptodate = 0;
420 devices[devcnt].state = info.disk.state;
421 if (most_recent < devcnt) {
422 if (devices[devcnt].events
423 > devices[most_recent].events)
424 most_recent = devcnt;
425 }
426 if (info.array.level == -4)
427 /* with multipath, the raid_disk from the superblock is meaningless */
428 i = devcnt;
429 else
430 i = devices[devcnt].raid_disk;
431 if (i+1 == 0) {
432 if (nextspare < info.array.raid_disks)
433 nextspare = info.array.raid_disks;
434 i = nextspare++;
435 }
436 if (i < 10000) {
437 if (i >= bestcnt) {
438 unsigned int newbestcnt = i+10;
439 int *newbest = malloc(sizeof(int)*newbestcnt);
440 unsigned int c;
441 for (c=0; c < newbestcnt; c++)
442 if (c < bestcnt)
443 newbest[c] = best[c];
444 else
445 newbest[c] = -1;
446 if (best)free(best);
447 best = newbest;
448 bestcnt = newbestcnt;
449 }
450 if (best[i] == -1
451 || devices[best[i]].events < devices[devcnt].events)
452 best[i] = devcnt;
453 }
454 devcnt++;
455 }
456
457 if (super)
458 free(super);
459 super = NULL;
460
461 if (update && strcmp(update, "byteorder")==0)
462 st->minor_version = 90;
463
464 if (devcnt == 0) {
465 fprintf(stderr, Name ": no devices found for %s\n",
466 mddev);
467 free(first_super);
468 return 1;
469 }
470
471 st->ss->getinfo_super(&info, first_super);
472
473 /* now we have some devices that might be suitable.
474 * I wonder how many
475 */
476 avail = malloc(info.array.raid_disks);
477 memset(avail, 0, info.array.raid_disks);
478 okcnt = 0;
479 sparecnt=0;
480 for (i=0; i< bestcnt ;i++) {
481 int j = best[i];
482 int event_margin = 1; /* always allow a difference of '1'
483 * like the kernel does
484 */
485 if (j < 0) continue;
486 /* note: we ignore error flags in multipath arrays
487 * as they don't make sense
488 */
489 if (info.array.level != -4)
490 if (!(devices[j].state & (1<<MD_DISK_SYNC))) {
491 if (!(devices[j].state & (1<<MD_DISK_FAULTY)))
492 sparecnt++;
493 continue;
494 }
495 if (devices[j].events+event_margin >=
496 devices[most_recent].events) {
497 devices[j].uptodate = 1;
498 if (i < info.array.raid_disks) {
499 okcnt++;
500 avail[i]=1;
501 } else
502 sparecnt++;
503 }
504 }
505 while (force && !enough(info.array.level, info.array.raid_disks,
506 info.array.layout,
507 avail, okcnt)) {
508 /* Choose the newest best drive which is
509 * not up-to-date, update the superblock
510 * and add it.
511 */
512 int fd;
513 chosen_drive = -1;
514 for (i=0; i<info.array.raid_disks && i < bestcnt; i++) {
515 int j = best[i];
516 if (j>=0 &&
517 !devices[j].uptodate &&
518 devices[j].events > 0 &&
519 (chosen_drive < 0 ||
520 devices[j].events > devices[chosen_drive].events))
521 chosen_drive = j;
522 }
523 if (chosen_drive < 0)
524 break;
525 if (verbose >= 0)
526 fprintf(stderr, Name ": forcing event count in %s(%d) from %d upto %d\n",
527 devices[chosen_drive].devname, devices[chosen_drive].raid_disk,
528 (int)(devices[chosen_drive].events),
529 (int)(devices[most_recent].events));
530 fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL);
531 if (fd < 0) {
532 fprintf(stderr, Name ": Couldn't open %s for write - not updating\n",
533 devices[chosen_drive].devname);
534 devices[chosen_drive].events = 0;
535 continue;
536 }
537 if (st->ss->load_super(st,fd, &super, NULL)) {
538 close(fd);
539 fprintf(stderr, Name ": RAID superblock disappeared from %s - not updating.\n",
540 devices[chosen_drive].devname);
541 devices[chosen_drive].events = 0;
542 continue;
543 }
544 info.events = devices[most_recent].events;
545 st->ss->update_super(&info, super, "force", devices[chosen_drive].devname, verbose, 0, NULL);
546
547 if (st->ss->store_super(st, fd, super)) {
548 close(fd);
549 fprintf(stderr, Name ": Could not re-write superblock on %s\n",
550 devices[chosen_drive].devname);
551 devices[chosen_drive].events = 0;
552 free(super);
553 continue;
554 }
555 close(fd);
556 devices[chosen_drive].events = devices[most_recent].events;
557 devices[chosen_drive].uptodate = 1;
558 avail[chosen_drive] = 1;
559 okcnt++;
560 free(super);
561 }
562
563 /* Now we want to look at the superblock which the kernel will base things on
564 * and compare the devices that we think are working with the devices that the
565 * superblock thinks are working.
566 * If there are differences and --force is given, then update this chosen
567 * superblock.
568 */
569 chosen_drive = -1;
570 super = NULL;
571 for (i=0; chosen_drive < 0 && i<bestcnt; i++) {
572 int j = best[i];
573 int fd;
574
575 if (j<0)
576 continue;
577 if (!devices[j].uptodate)
578 continue;
579 chosen_drive = j;
580 if ((fd=dev_open(devices[j].devname, O_RDONLY|O_EXCL))< 0) {
581 fprintf(stderr, Name ": Cannot open %s: %s\n",
582 devices[j].devname, strerror(errno));
583 return 1;
584 }
585 if (st->ss->load_super(st,fd, &super, NULL)) {
586 close(fd);
587 fprintf(stderr, Name ": RAID superblock has disappeared from %s\n",
588 devices[j].devname);
589 return 1;
590 }
591 close(fd);
592 }
593 if (super == NULL) {
594 fprintf(stderr, Name ": No suitable drives found for %s\n", mddev);
595 return 1;
596 }
597 st->ss->getinfo_super(&info, super);
598 for (i=0; i<bestcnt; i++) {
599 int j = best[i];
600 unsigned int desired_state;
601
602 if (i < info.array.raid_disks)
603 desired_state = (1<<MD_DISK_ACTIVE) | (1<<MD_DISK_SYNC);
604 else
605 desired_state = 0;
606
607 if (j<0)
608 continue;
609 if (!devices[j].uptodate)
610 continue;
611 info.disk.number = devices[j].disk_nr;
612 info.disk.raid_disk = i;
613 info.disk.state = desired_state;
614
615 if (devices[j].uptodate &&
616 st->ss->update_super(&info, super, "assemble", NULL, verbose, 0, NULL)) {
617 if (force) {
618 if (verbose >= 0)
619 fprintf(stderr, Name ": "
620 "clearing FAULTY flag for device %d in %s for %s\n",
621 j, mddev, devices[j].devname);
622 change = 1;
623 } else {
624 if (verbose >= -1)
625 fprintf(stderr, Name ": "
626 "device %d in %s has wrong state in superblock, but %s seems ok\n",
627 i, mddev, devices[j].devname);
628 }
629 }
630 #if 0
631 if (!devices[j].uptodate &&
632 !(super.disks[i].state & (1 << MD_DISK_FAULTY))) {
633 fprintf(stderr, Name ": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n",
634 i, mddev);
635 }
636 #endif
637 }
638 if (force && okcnt == info.array.raid_disks-1) {
639 /* FIXME check event count */
640 change += st->ss->update_super(&info, super, "force",
641 devices[chosen_drive].devname, verbose, 0, NULL);
642 }
643
644 if (change) {
645 int fd;
646 fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL);
647 if (fd < 0) {
648 fprintf(stderr, Name ": Could not open %s for write - cannot Assemble array.\n",
649 devices[chosen_drive].devname);
650 return 1;
651 }
652 if (st->ss->store_super(st, fd, super)) {
653 close(fd);
654 fprintf(stderr, Name ": Could not re-write superblock on %s\n",
655 devices[chosen_drive].devname);
656 return 1;
657 }
658 close(fd);
659 }
660
661 /* If we are in the middle of a reshape we may need to restore saved data
662 * that was moved aside due to the reshape overwriting live data
663 * The code of doing this lives in Grow.c
664 */
665 #ifndef MDASSEMBLE
666 if (info.reshape_active) {
667 int err = 0;
668 int *fdlist = malloc(sizeof(int)* bestcnt);
669 for (i=0; i<bestcnt; i++) {
670 int j = best[i];
671 if (j >= 0) {
672 fdlist[i] = dev_open(devices[j].devname, O_RDWR|O_EXCL);
673 if (fdlist[i] < 0) {
674 fprintf(stderr, Name ": Could not open %s for write - cannot Assemble array.\n",
675 devices[j].devname);
676 err = 1;
677 break;
678 }
679 } else
680 fdlist[i] = -1;
681 }
682 if (!err)
683 err = Grow_restart(st, &info, fdlist, bestcnt, backup_file);
684 while (i>0) {
685 i--;
686 if (fdlist[i]>=0) close(fdlist[i]);
687 }
688 if (err) {
689 fprintf(stderr, Name ": Failed to restore critical section for reshape, sorry.\n");
690 return err;
691 }
692 }
693 #endif
694 /* count number of in-sync devices according to the superblock.
695 * We must have this number to start the array without -s or -R
696 */
697 req_cnt = info.array.working_disks;
698
699 /* Almost ready to actually *do* something */
700 if (!old_linux) {
701 int rv;
702 if ((vers % 100) >= 1) { /* can use different versions */
703 mdu_array_info_t inf;
704 memset(&inf, 0, sizeof(inf));
705 inf.major_version = st->ss->major;
706 inf.minor_version = st->minor_version;
707 rv = ioctl(mdfd, SET_ARRAY_INFO, &inf);
708 } else
709 rv = ioctl(mdfd, SET_ARRAY_INFO, NULL);
710
711 if (rv) {
712 fprintf(stderr, Name ": SET_ARRAY_INFO failed for %s: %s\n",
713 mddev, strerror(errno));
714 return 1;
715 }
716 if (ident->bitmap_fd >= 0) {
717 if (ioctl(mdfd, SET_BITMAP_FILE, ident->bitmap_fd) != 0) {
718 fprintf(stderr, Name ": SET_BITMAP_FILE failed.\n");
719 return 1;
720 }
721 } else if (ident->bitmap_file) {
722 /* From config file */
723 int bmfd = open(ident->bitmap_file, O_RDWR);
724 if (bmfd < 0) {
725 fprintf(stderr, Name ": Could not open bitmap file %s\n",
726 ident->bitmap_file);
727 return 1;
728 }
729 if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) {
730 fprintf(stderr, Name ": Failed to set bitmapfile for %s\n", mddev);
731 close(bmfd);
732 return 1;
733 }
734 close(bmfd);
735 }
736
737 /* First, add the raid disks, but add the chosen one last */
738 for (i=0; i<= bestcnt; i++) {
739 int j;
740 if (i < bestcnt) {
741 j = best[i];
742 if (j == chosen_drive)
743 continue;
744 } else
745 j = chosen_drive;
746
747 if (j >= 0 /* && devices[j].uptodate */) {
748 mdu_disk_info_t disk;
749 memset(&disk, 0, sizeof(disk));
750 disk.major = devices[j].major;
751 disk.minor = devices[j].minor;
752 if (ioctl(mdfd, ADD_NEW_DISK, &disk)!=0) {
753 fprintf(stderr, Name ": failed to add %s to %s: %s\n",
754 devices[j].devname,
755 mddev,
756 strerror(errno));
757 if (i < info.array.raid_disks || i == bestcnt)
758 okcnt--;
759 else
760 sparecnt--;
761 } else if (verbose > 0)
762 fprintf(stderr, Name ": added %s to %s as %d\n",
763 devices[j].devname, mddev, devices[j].raid_disk);
764 } else if (verbose > 0 && i < info.array.raid_disks)
765 fprintf(stderr, Name ": no uptodate device for slot %d of %s\n",
766 i, mddev);
767 }
768
769 if (runstop == 1 ||
770 (runstop <= 0 &&
771 ( enough(info.array.level, info.array.raid_disks, info.array.layout, avail, okcnt) &&
772 (okcnt >= req_cnt || start_partial_ok)
773 ))) {
774 if (ioctl(mdfd, RUN_ARRAY, NULL)==0) {
775 if (verbose >= 0) {
776 fprintf(stderr, Name ": %s has been started with %d drive%s",
777 mddev, okcnt, okcnt==1?"":"s");
778 if (okcnt < info.array.raid_disks)
779 fprintf(stderr, " (out of %d)", info.array.raid_disks);
780 if (sparecnt)
781 fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s");
782 fprintf(stderr, ".\n");
783 }
784 return 0;
785 }
786 fprintf(stderr, Name ": failed to RUN_ARRAY %s: %s\n",
787 mddev, strerror(errno));
788 return 1;
789 }
790 if (runstop == -1) {
791 fprintf(stderr, Name ": %s assembled from %d drive%s",
792 mddev, okcnt, okcnt==1?"":"s");
793 if (okcnt != info.array.raid_disks)
794 fprintf(stderr, " (out of %d)", info.array.raid_disks);
795 fprintf(stderr, ", but not started.\n");
796 return 0;
797 }
798 if (verbose >= 0) {
799 fprintf(stderr, Name ": %s assembled from %d drive%s", mddev, okcnt, okcnt==1?"":"s");
800 if (sparecnt)
801 fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s");
802 if (!enough(info.array.level, info.array.raid_disks, info.array.layout, avail, okcnt))
803 fprintf(stderr, " - not enough to start the array.\n");
804 else {
805 if (req_cnt == info.array.raid_disks)
806 fprintf(stderr, " - need all %d to start it", req_cnt);
807 else
808 fprintf(stderr, " - need %d of %d to start", req_cnt, info.array.raid_disks);
809 fprintf(stderr, " (use --run to insist).\n");
810 }
811 }
812 return 1;
813 } else {
814 /* The "chosen_drive" is a good choice, and if necessary, the superblock has
815 * been updated to point to the current locations of devices.
816 * so we can just start the array
817 */
818 unsigned long dev;
819 dev = makedev(devices[chosen_drive].major,
820 devices[chosen_drive].minor);
821 if (ioctl(mdfd, START_ARRAY, dev)) {
822 fprintf(stderr, Name ": Cannot start array: %s\n",
823 strerror(errno));
824 }
825
826 }
827 return 0;
828 }
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