]> git.ipfire.org Git - thirdparty/mdadm.git/blob - Assemble.c
projects / thirdparty / mdadm.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Support updating of uuid during --assemble.
[thirdparty/mdadm.git] / Assemble.c
1 /*
2 * mdadm - manage Linux "md" devices aka RAID arrays.
3 *
4 * Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
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,
35 int readonly, int runstop,
36 char *update,
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 = force || devlist==NULL;
117 unsigned int num_devs;
118 mddev_dev_t tmpdev;
119 struct mdinfo info;
120 struct mddev_ident_s ident2;
121 char *avail;
122 int nextspare = 0;
123
124 vers = md_get_version(mdfd);
125 if (vers <= 0) {
126 fprintf(stderr, Name ": %s appears not to be an md device.\n", mddev);
127 return 1;
128 }
129 if (vers < 9000) {
130 fprintf(stderr, Name ": Assemble requires driver version 0.90.0 or later.\n"
131 " Upgrade your kernel or try --build\n");
132 return 1;
133 }
134 if (get_linux_version() < 2004000)
135 old_linux = 1;
136
137 if (ioctl(mdfd, GET_ARRAY_INFO, &info.array)>=0) {
138 fprintf(stderr, Name ": device %s already active - cannot assemble it\n",
139 mddev);
140 return 1;
141 }
142 ioctl(mdfd, STOP_ARRAY, NULL); /* just incase it was started but has no content */
143
144 /*
145 * If any subdevs are listed, then any that don't
146 * match ident are discarded. Remainder must all match and
147 * become the array.
148 * If no subdevs, then we scan all devices in the config file, but
149 * there must be something in the identity
150 */
151
152 if (!devlist &&
153 ident->uuid_set == 0 &&
154 ident->super_minor < 0 &&
155 ident->devices == NULL) {
156 fprintf(stderr, Name ": No identity information available for %s - cannot assemble.\n",
157 mddev);
158 return 1;
159 }
160 if (devlist == NULL)
161 devlist = conf_get_devs(conffile);
162 else inargv = 1;
163
164 tmpdev = devlist; num_devs = 0;
165 while (tmpdev) {
166 num_devs++;
167 tmpdev = tmpdev->next;
168 }
169 devices = malloc(num_devs * sizeof(*devices));
170
171 if (!st && ident->st) st = ident->st;
172
173 if (verbose>0)
174 fprintf(stderr, Name ": looking for devices for %s\n",
175 mddev);
176
177 while ( devlist) {
178 char *devname;
179 int dfd;
180 struct stat stb;
181 struct supertype *tst = st;
182
183 devname = devlist->devname;
184 devlist = devlist->next;
185
186 if (ident->devices &&
187 !match_oneof(ident->devices, devname)) {
188 if ((inargv && verbose>=0) || verbose > 0)
189 fprintf(stderr, Name ": %s is not one of %s\n", devname, ident->devices);
190 continue;
191 }
192
193 if (super) {
194 free(super);
195 super = NULL;
196 }
197
198 dfd = dev_open(devname, O_RDONLY|O_EXCL);
199 if (dfd < 0) {
200 if ((inargv && verbose >= 0) || verbose > 0)
201 fprintf(stderr, Name ": cannot open device %s: %s\n",
202 devname, strerror(errno));
203 } else if (fstat(dfd, &stb)< 0) {
204 /* Impossible! */
205 fprintf(stderr, Name ": fstat failed for %s: %s\n",
206 devname, strerror(errno));
207 } else if ((stb.st_mode & S_IFMT) != S_IFBLK) {
208 fprintf(stderr, Name ": %s is not a block device.\n",
209 devname);
210 } else if (!tst && (tst = guess_super(dfd)) == NULL) {
211 if ((inargv && verbose >= 0) || verbose > 0)
212 fprintf(stderr, Name ": no recogniseable superblock\n");
213 } else if (tst->ss->load_super(tst,dfd, &super, NULL)) {
214 if ((inargv && verbose >= 0) || verbose > 0)
215 fprintf( stderr, Name ": no RAID superblock on %s\n",
216 devname);
217 } else {
218 tst->ss->getinfo_super(&info, &ident2, super);
219 }
220 if (dfd >= 0) close(dfd);
221
222 if (ident->uuid_set && (!update && strcmp(update, "uuid")!= 0) &&
223 (!super || same_uuid(info.uuid, ident->uuid, tst->ss->swapuuid)==0)) {
224 if ((inargv && verbose >= 0) || verbose > 0)
225 fprintf(stderr, Name ": %s has wrong uuid.\n",
226 devname);
227 continue;
228 }
229 if (ident->name[0] &&
230 (!super || strncmp(ident2.name, ident->name, 32)!=0)) {
231 if ((inargv && verbose >= 0) || verbose > 0)
232 fprintf(stderr, Name ": %s has wrong name.\n",
233 devname);
234 continue;
235 }
236 if (ident->super_minor != UnSet &&
237 (!super || ident->super_minor != info.array.md_minor)) {
238 if ((inargv && verbose >= 0) || verbose > 0)
239 fprintf(stderr, Name ": %s has wrong super-minor.\n",
240 devname);
241 continue;
242 }
243 if (ident->level != UnSet &&
244 (!super|| ident->level != info.array.level)) {
245 if ((inargv && verbose >= 0) || verbose > 0)
246 fprintf(stderr, Name ": %s has wrong raid level.\n",
247 devname);
248 continue;
249 }
250 if (ident->raid_disks != UnSet &&
251 (!super || ident->raid_disks!= info.array.raid_disks)) {
252 if ((inargv && verbose >= 0) || verbose > 0)
253 fprintf(stderr, Name ": %s requires wrong number of drives.\n",
254 devname);
255 continue;
256 }
257
258 /* If we are this far, then we are commited to this device.
259 * If the super_block doesn't exist, or doesn't match others,
260 * then we cannot continue
261 */
262
263 if (!super) {
264 fprintf(stderr, Name ": %s has no superblock - assembly aborted\n",
265 devname);
266 free(first_super);
267 return 1;
268 }
269 st = tst; /* commit to this format, if haven't already */
270 if (st->ss->compare_super(&first_super, super)) {
271 fprintf(stderr, Name ": superblock on %s doesn't match others - assembly aborted\n",
272 devname);
273 free(super);
274 free(first_super);
275 return 1;
276 }
277
278 /* looks like a good enough match to update the super block if needed */
279 if (update) {
280 /* prepare useful information in info structures */
281 struct stat stb2;
282 fstat(mdfd, &stb2);
283 info.array.md_minor = minor(stb2.st_rdev);
284
285 if (strcmp(update, "uuid")==0 &&
286 !ident->uuid_set) {
287 int rfd;
288 if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
289 read(rfd, ident->uuid, 16) != 16) {
290 *(__u32*)(ident->uuid) = random();
291 *(__u32*)(ident->uuid+1) = random();
292 *(__u32*)(ident->uuid+2) = random();
293 *(__u32*)(ident->uuid+3) = random();
294 }
295 if (rfd >= 0) close(rfd);
296 ident->uuid_set = 1;
297 }
298 memcpy(info.uuid, ident->uuid, 16);
299 st->ss->update_super(&info, super, update, devname, verbose);
300
301 dfd = dev_open(devname, O_RDWR|O_EXCL);
302 if (dfd < 0)
303 fprintf(stderr, Name ": Cannot open %s for superblock update\n",
304 devname);
305 else if (st->ss->store_super(st, dfd, super))
306 fprintf(stderr, Name ": Could not re-write superblock on %s.\n",
307 devname);
308 if (dfd >= 0)
309 close(dfd);
310 }
311
312 if (verbose > 0)
313 fprintf(stderr, Name ": %s is identified as a member of %s, slot %d.\n",
314 devname, mddev, info.disk.raid_disk);
315 devices[devcnt].devname = devname;
316 devices[devcnt].major = major(stb.st_rdev);
317 devices[devcnt].minor = minor(stb.st_rdev);
318 devices[devcnt].oldmajor = info.disk.major;
319 devices[devcnt].oldminor = info.disk.minor;
320 devices[devcnt].events = info.events;
321 devices[devcnt].raid_disk = info.disk.raid_disk;
322 devices[devcnt].disk_nr = info.disk.number;
323 devices[devcnt].uptodate = 0;
324 devices[devcnt].state = info.disk.state;
325 if (most_recent < devcnt) {
326 if (devices[devcnt].events
327 > devices[most_recent].events)
328 most_recent = devcnt;
329 }
330 if (info.array.level == -4)
331 /* with multipath, the raid_disk from the superblock is meaningless */
332 i = devcnt;
333 else
334 i = devices[devcnt].raid_disk;
335 if (i+1 == 0) {
336 if (nextspare < info.array.raid_disks)
337 nextspare = info.array.raid_disks;
338 i = nextspare++;
339 }
340 if (i < 10000) {
341 if (i >= bestcnt) {
342 unsigned int newbestcnt = i+10;
343 int *newbest = malloc(sizeof(int)*newbestcnt);
344 unsigned int c;
345 for (c=0; c < newbestcnt; c++)
346 if (c < bestcnt)
347 newbest[c] = best[c];
348 else
349 newbest[c] = -1;
350 if (best)free(best);
351 best = newbest;
352 bestcnt = newbestcnt;
353 }
354 if (best[i] == -1
355 || devices[best[i]].events < devices[devcnt].events)
356 best[i] = devcnt;
357 }
358 devcnt++;
359 }
360
361 if (super)
362 free(super);
363 super = NULL;
364
365 if (update && strcmp(update, "byteorder")==0)
366 st->minor_version = 90;
367
368 if (devcnt == 0) {
369 fprintf(stderr, Name ": no devices found for %s\n",
370 mddev);
371 free(first_super);
372 return 1;
373 }
374
375 st->ss->getinfo_super(&info, &ident2, first_super);
376
377 /* now we have some devices that might be suitable.
378 * I wonder how many
379 */
380 avail = malloc(info.array.raid_disks);
381 memset(avail, 0, info.array.raid_disks);
382 okcnt = 0;
383 sparecnt=0;
384 for (i=0; i< bestcnt ;i++) {
385 int j = best[i];
386 int event_margin = 1; /* always allow a difference of '1'
387 * like the kernel does
388 */
389 if (j < 0) continue;
390 /* note: we ignore error flags in multipath arrays
391 * as they don't make sense
392 */
393 if (info.array.level != -4)
394 if (!(devices[j].state & (1<<MD_DISK_SYNC))) {
395 if (!(devices[j].state & (1<<MD_DISK_FAULTY)))
396 sparecnt++;
397 continue;
398 }
399 if (devices[j].events+event_margin >=
400 devices[most_recent].events) {
401 devices[j].uptodate = 1;
402 if (i < info.array.raid_disks) {
403 okcnt++;
404 avail[i]=1;
405 } else
406 sparecnt++;
407 }
408 }
409 while (force && !enough(info.array.level, info.array.raid_disks,
410 info.array.layout,
411 avail, okcnt)) {
412 /* Choose the newest best drive which is
413 * not up-to-date, update the superblock
414 * and add it.
415 */
416 int fd;
417 chosen_drive = -1;
418 for (i=0; i<info.array.raid_disks && i < bestcnt; i++) {
419 int j = best[i];
420 if (j>=0 &&
421 !devices[j].uptodate &&
422 devices[j].events > 0 &&
423 (chosen_drive < 0 ||
424 devices[j].events > devices[chosen_drive].events))
425 chosen_drive = j;
426 }
427 if (chosen_drive < 0)
428 break;
429 if (verbose >= 0)
430 fprintf(stderr, Name ": forcing event count in %s(%d) from %d upto %d\n",
431 devices[chosen_drive].devname, devices[chosen_drive].raid_disk,
432 (int)(devices[chosen_drive].events),
433 (int)(devices[most_recent].events));
434 fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL);
435 if (fd < 0) {
436 fprintf(stderr, Name ": Couldn't open %s for write - not updating\n",
437 devices[chosen_drive].devname);
438 devices[chosen_drive].events = 0;
439 continue;
440 }
441 if (st->ss->load_super(st,fd, &super, NULL)) {
442 close(fd);
443 fprintf(stderr, Name ": RAID superblock disappeared from %s - not updating.\n",
444 devices[chosen_drive].devname);
445 devices[chosen_drive].events = 0;
446 continue;
447 }
448 info.events = devices[most_recent].events;
449 st->ss->update_super(&info, super, "force", devices[chosen_drive].devname, verbose);
450
451 if (st->ss->store_super(st, fd, super)) {
452 close(fd);
453 fprintf(stderr, Name ": Could not re-write superblock on %s\n",
454 devices[chosen_drive].devname);
455 devices[chosen_drive].events = 0;
456 free(super);
457 continue;
458 }
459 close(fd);
460 devices[chosen_drive].events = devices[most_recent].events;
461 devices[chosen_drive].uptodate = 1;
462 avail[chosen_drive] = 1;
463 okcnt++;
464 free(super);
465 }
466
467 /* Now we want to look at the superblock which the kernel will base things on
468 * and compare the devices that we think are working with the devices that the
469 * superblock thinks are working.
470 * If there are differences and --force is given, then update this chosen
471 * superblock.
472 */
473 chosen_drive = -1;
474 super = NULL;
475 for (i=0; chosen_drive < 0 && i<bestcnt; i++) {
476 int j = best[i];
477 int fd;
478
479 if (j<0)
480 continue;
481 if (!devices[j].uptodate)
482 continue;
483 chosen_drive = j;
484 if ((fd=dev_open(devices[j].devname, O_RDONLY|O_EXCL))< 0) {
485 fprintf(stderr, Name ": Cannot open %s: %s\n",
486 devices[j].devname, strerror(errno));
487 return 1;
488 }
489 if (st->ss->load_super(st,fd, &super, NULL)) {
490 close(fd);
491 fprintf(stderr, Name ": RAID superblock has disappeared from %s\n",
492 devices[j].devname);
493 return 1;
494 }
495 close(fd);
496 }
497 if (super == NULL) {
498 fprintf(stderr, Name ": No suitable drives found for %s\n", mddev);
499 return 1;
500 }
501 st->ss->getinfo_super(&info, &ident2, super);
502 for (i=0; i<bestcnt; i++) {
503 int j = best[i];
504 unsigned int desired_state;
505
506 if (i < info.array.raid_disks)
507 desired_state = (1<<MD_DISK_ACTIVE) | (1<<MD_DISK_SYNC);
508 else
509 desired_state = 0;
510
511 if (j<0)
512 continue;
513 if (!devices[j].uptodate)
514 continue;
515 info.disk.number = devices[j].disk_nr;
516 info.disk.raid_disk = i;
517 info.disk.state = desired_state;
518
519 if (devices[j].uptodate &&
520 st->ss->update_super(&info, super, "assemble", NULL, verbose)) {
521 if (force) {
522 if (verbose >= 0)
523 fprintf(stderr, Name ": "
524 "clearing FAULTY flag for device %d in %s for %s\n",
525 j, mddev, devices[j].devname);
526 change = 1;
527 } else {
528 if (verbose >= -1)
529 fprintf(stderr, Name ": "
530 "device %d in %s has wrong state in superblock, but %s seems ok\n",
531 i, mddev, devices[j].devname);
532 }
533 }
534 #if 0
535 if (!devices[j].uptodate &&
536 !(super.disks[i].state & (1 << MD_DISK_FAULTY))) {
537 fprintf(stderr, Name ": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n",
538 i, mddev);
539 }
540 #endif
541 }
542 if (force && okcnt == info.array.raid_disks-1) {
543 /* FIXME check event count */
544 change += st->ss->update_super(&info, super, "force",
545 devices[chosen_drive].devname, verbose);
546 }
547
548 if (change) {
549 int fd;
550 fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL);
551 if (fd < 0) {
552 fprintf(stderr, Name ": Could open %s for write - cannot Assemble array.\n",
553 devices[chosen_drive].devname);
554 return 1;
555 }
556 if (st->ss->store_super(st, fd, super)) {
557 close(fd);
558 fprintf(stderr, Name ": Could not re-write superblock on %s\n",
559 devices[chosen_drive].devname);
560 return 1;
561 }
562 close(fd);
563 }
564
565 /* count number of in-sync devices according to the superblock.
566 * We must have this number to start the array without -s or -R
567 */
568 req_cnt = info.array.working_disks;
569
570 /* Almost ready to actually *do* something */
571 if (!old_linux) {
572 int rv;
573 if ((vers % 100) >= 1) { /* can use different versions */
574 mdu_array_info_t inf;
575 memset(&inf, 0, sizeof(inf));
576 inf.major_version = st->ss->major;
577 inf.minor_version = st->minor_version;
578 rv = ioctl(mdfd, SET_ARRAY_INFO, &inf);
579 } else
580 rv = ioctl(mdfd, SET_ARRAY_INFO, NULL);
581
582 if (rv) {
583 fprintf(stderr, Name ": SET_ARRAY_INFO failed for %s: %s\n",
584 mddev, strerror(errno));
585 return 1;
586 }
587 if (ident->bitmap_fd >= 0) {
588 if (ioctl(mdfd, SET_BITMAP_FILE, ident->bitmap_fd) != 0) {
589 fprintf(stderr, Name ": SET_BITMAP_FILE failed.\n");
590 return 1;
591 }
592 }
593
594 /* First, add the raid disks, but add the chosen one last */
595 for (i=0; i<= bestcnt; i++) {
596 int j;
597 if (i < bestcnt) {
598 j = best[i];
599 if (j == chosen_drive)
600 continue;
601 } else
602 j = chosen_drive;
603
604 if (j >= 0 /* && devices[j].uptodate */) {
605 mdu_disk_info_t disk;
606 memset(&disk, 0, sizeof(disk));
607 disk.major = devices[j].major;
608 disk.minor = devices[j].minor;
609 if (ioctl(mdfd, ADD_NEW_DISK, &disk)!=0) {
610 fprintf(stderr, Name ": failed to add %s to %s: %s\n",
611 devices[j].devname,
612 mddev,
613 strerror(errno));
614 if (i < info.array.raid_disks || i == bestcnt)
615 okcnt--;
616 else
617 sparecnt--;
618 } else if (verbose > 0)
619 fprintf(stderr, Name ": added %s to %s as %d\n",
620 devices[j].devname, mddev, devices[j].raid_disk);
621 } else if (verbose > 0 && i < info.array.raid_disks)
622 fprintf(stderr, Name ": no uptodate device for slot %d of %s\n",
623 i, mddev);
624 }
625
626 if (runstop == 1 ||
627 (runstop == 0 &&
628 ( enough(info.array.level, info.array.raid_disks, info.array.layout, avail, okcnt) &&
629 (okcnt >= req_cnt || start_partial_ok)
630 ))) {
631 if (ioctl(mdfd, RUN_ARRAY, NULL)==0) {
632 if (verbose >= 0) {
633 fprintf(stderr, Name ": %s has been started with %d drive%s",
634 mddev, okcnt, okcnt==1?"":"s");
635 if (okcnt < info.array.raid_disks)
636 fprintf(stderr, " (out of %d)", info.array.raid_disks);
637 if (sparecnt)
638 fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s");
639 fprintf(stderr, ".\n");
640 }
641 return 0;
642 }
643 fprintf(stderr, Name ": failed to RUN_ARRAY %s: %s\n",
644 mddev, strerror(errno));
645 return 1;
646 }
647 if (runstop == -1) {
648 fprintf(stderr, Name ": %s assembled from %d drive%s, but not started.\n",
649 mddev, okcnt, okcnt==1?"":"s");
650 return 0;
651 }
652 if (verbose >= 0) {
653 fprintf(stderr, Name ": %s assembled from %d drive%s", mddev, okcnt, okcnt==1?"":"s");
654 if (sparecnt)
655 fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s");
656 if (!enough(info.array.level, info.array.raid_disks, info.array.layout, avail, okcnt))
657 fprintf(stderr, " - not enough to start the array.\n");
658 else {
659 if (req_cnt == info.array.raid_disks)
660 fprintf(stderr, " - need all %d to start it", req_cnt);
661 else
662 fprintf(stderr, " - need %d of %d to start", req_cnt, info.array.raid_disks);
663 fprintf(stderr, " (use --run to insist).\n");
664 }
665 }
666 return 1;
667 } else {
668 /* The "chosen_drive" is a good choice, and if necessary, the superblock has
669 * been updated to point to the current locations of devices.
670 * so we can just start the array
671 */
672 unsigned long dev;
673 dev = makedev(devices[chosen_drive].major,
674 devices[chosen_drive].minor);
675 if (ioctl(mdfd, START_ARRAY, dev)) {
676 fprintf(stderr, Name ": Cannot start array: %s\n",
677 strerror(errno));
678 }
679
680 }
681 return 0;
682 }
Unnamed repository; edit this file 'description' to name the repository.