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