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