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