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64c4757e | 1 | /* |
9a9dab36 | 2 | * mdadm - manage Linux "md" devices aka RAID arrays. |
64c4757e | 3 | * |
cd29a5c8 | 4 | * Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au> |
64c4757e NB |
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 | ||
9a9dab36 | 30 | #include "mdadm.h" |
64c4757e NB |
31 | |
32 | int Assemble(char *mddev, int mdfd, | |
52826846 | 33 | mddev_ident_t ident, char *conffile, |
cd29a5c8 | 34 | mddev_dev_t devlist, |
64c4757e | 35 | int readonly, int runstop, |
5787fa49 | 36 | char *update, |
64c4757e NB |
37 | int verbose, int force) |
38 | { | |
39 | /* | |
52826846 NB |
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 | |
64c4757e NB |
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 | * | |
4b1ac34b | 53 | * If mddev is not set, then scan must be set and we |
64c4757e NB |
54 | * read through the config file for dev+uuid mapping |
55 | * We recurse, setting mddev, for each device that | |
56 | * - isn't running | |
4b1ac34b | 57 | * - has a valid uuid (or any uuid if !uuidset) |
64c4757e NB |
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 | |
cd29a5c8 | 69 | * If !devlist and scan and uuidset, get list of devs from conf-file |
64c4757e NB |
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 | |
5787fa49 | 74 | * Check superblock similarity if we have a superblock - discard if different |
4b1ac34b | 75 | * Record events, devicenum |
64c4757e | 76 | * This should give us a list of devices for the array |
4b1ac34b | 77 | * We should collect the most recent event number |
64c4757e NB |
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; | |
4b1ac34b | 95 | void *first_super = NULL, *super = NULL; |
64c4757e NB |
96 | struct { |
97 | char *devname; | |
98c6faba NB |
98 | unsigned int major, minor; |
99 | unsigned int oldmajor, oldminor; | |
64c4757e | 100 | long long events; |
64c4757e | 101 | int uptodate; |
d013a55e | 102 | int state; |
52826846 | 103 | int raid_disk; |
5787fa49 | 104 | } *devices; |
56eedc1a | 105 | int *best = NULL; /* indexed by raid_disk */ |
98c6faba NB |
106 | unsigned int bestcnt = 0; |
107 | int devcnt = 0; | |
108 | unsigned int okcnt, sparecnt; | |
109 | unsigned int req_cnt; | |
110 | unsigned int i; | |
64c4757e | 111 | int most_recent = 0; |
cd29a5c8 | 112 | int chosen_drive; |
52826846 | 113 | int change = 0; |
cd29a5c8 NB |
114 | int inargv = 0; |
115 | int start_partial_ok = force || devlist==NULL; | |
98c6faba | 116 | unsigned int num_devs; |
5787fa49 | 117 | mddev_dev_t tmpdev; |
4b1ac34b | 118 | struct mdinfo info; |
64c4757e | 119 | |
64c4757e NB |
120 | vers = md_get_version(mdfd); |
121 | if (vers <= 0) { | |
e0d19036 | 122 | fprintf(stderr, Name ": %s appears not to be an md device.\n", mddev); |
64c4757e NB |
123 | return 1; |
124 | } | |
682c7051 NB |
125 | if (vers < 9000) { |
126 | fprintf(stderr, Name ": Assemble requires driver version 0.90.0 or later.\n" | |
52826846 | 127 | " Upgrade your kernel or try --build\n"); |
64c4757e NB |
128 | return 1; |
129 | } | |
682c7051 | 130 | if (get_linux_version() < 2004000) |
64c4757e NB |
131 | old_linux = 1; |
132 | ||
4b1ac34b | 133 | if (ioctl(mdfd, GET_ARRAY_INFO, &info.array)>=0) { |
682c7051 | 134 | fprintf(stderr, Name ": device %s already active - cannot assemble it\n", |
64c4757e NB |
135 | mddev); |
136 | return 1; | |
137 | } | |
138 | ioctl(mdfd, STOP_ARRAY, NULL); /* just incase it was started but has no content */ | |
139 | ||
140 | /* | |
52826846 NB |
141 | * If any subdevs are listed, then any that don't |
142 | * match ident are discarded. Remainder must all match and | |
143 | * become the array. | |
144 | * If no subdevs, then we scan all devices in the config file, but | |
145 | * there must be something in the identity | |
64c4757e | 146 | */ |
64c4757e | 147 | |
cd29a5c8 | 148 | if (!devlist && |
52826846 NB |
149 | ident->uuid_set == 0 && |
150 | ident->super_minor < 0 && | |
151 | ident->devices == NULL) { | |
152 | fprintf(stderr, Name ": No identity information available for %s - cannot assemble.\n", | |
153 | mddev); | |
154 | return 1; | |
64c4757e | 155 | } |
cd29a5c8 | 156 | if (devlist == NULL) |
64c4757e | 157 | devlist = conf_get_devs(conffile); |
cd29a5c8 | 158 | else inargv = 1; |
64c4757e | 159 | |
5787fa49 NB |
160 | tmpdev = devlist; num_devs = 0; |
161 | while (tmpdev) { | |
162 | num_devs++; | |
163 | tmpdev = tmpdev->next; | |
164 | } | |
5787fa49 NB |
165 | devices = malloc(num_devs * sizeof(*devices)); |
166 | ||
64c4757e | 167 | |
82b27616 NB |
168 | if (verbose) |
169 | fprintf(stderr, Name ": looking for devices for %s\n", | |
170 | mddev); | |
171 | ||
cd29a5c8 | 172 | while ( devlist) { |
64c4757e | 173 | char *devname; |
64c4757e NB |
174 | int dfd; |
175 | struct stat stb; | |
52826846 | 176 | |
cd29a5c8 NB |
177 | devname = devlist->devname; |
178 | devlist = devlist->next; | |
64c4757e | 179 | |
52826846 | 180 | if (ident->devices && |
56eedc1a NB |
181 | !match_oneof(ident->devices, devname)) { |
182 | if (inargv || verbose) | |
183 | fprintf(stderr, Name ": %s is not one of %s\n", devname, ident->devices); | |
52826846 | 184 | continue; |
56eedc1a | 185 | } |
4b1ac34b NB |
186 | |
187 | if (super) { | |
188 | free(super); | |
189 | super = NULL; | |
190 | } | |
52826846 | 191 | |
d7eaf49f | 192 | dfd = open(devname, O_RDONLY|O_EXCL, 0); |
64c4757e NB |
193 | if (dfd < 0) { |
194 | if (inargv || verbose) | |
682c7051 | 195 | fprintf(stderr, Name ": cannot open device %s: %s\n", |
64c4757e | 196 | devname, strerror(errno)); |
52826846 NB |
197 | } else if (fstat(dfd, &stb)< 0) { |
198 | /* Impossible! */ | |
199 | fprintf(stderr, Name ": fstat failed for %s: %s\n", | |
200 | devname, strerror(errno)); | |
201 | close(dfd); | |
cd29a5c8 NB |
202 | } else if ((stb.st_mode & S_IFMT) != S_IFBLK) { |
203 | fprintf(stderr, Name ": %s is not a block device.\n", | |
52826846 NB |
204 | devname); |
205 | close(dfd); | |
4b1ac34b | 206 | } else if (load_super0(dfd, &super, NULL)) { |
64c4757e | 207 | if (inargv || verbose) |
682c7051 | 208 | fprintf( stderr, Name ": no RAID superblock on %s\n", |
64c4757e NB |
209 | devname); |
210 | close(dfd); | |
52826846 | 211 | } else { |
4b1ac34b | 212 | getinfo_super0(&info, super); |
52826846 | 213 | close(dfd); |
64c4757e | 214 | } |
52826846 NB |
215 | |
216 | if (ident->uuid_set && | |
4b1ac34b | 217 | (!super || same_uuid(info.uuid, ident->uuid)==0)) { |
52826846 NB |
218 | if (inargv || verbose) |
219 | fprintf(stderr, Name ": %s has wrong uuid.\n", | |
220 | devname); | |
221 | continue; | |
82b27616 | 222 | } |
98c6faba | 223 | if (ident->super_minor != UnSet && |
4b1ac34b | 224 | (!super || ident->super_minor != info.array.md_minor)) { |
64c4757e | 225 | if (inargv || verbose) |
52826846 | 226 | fprintf(stderr, Name ": %s has wrong super-minor.\n", |
64c4757e NB |
227 | devname); |
228 | continue; | |
229 | } | |
98c6faba | 230 | if (ident->level != UnSet && |
4b1ac34b | 231 | (!super|| ident->level != info.array.level)) { |
cd29a5c8 NB |
232 | if (inargv || verbose) |
233 | fprintf(stderr, Name ": %s has wrong raid level.\n", | |
234 | devname); | |
235 | continue; | |
236 | } | |
98c6faba | 237 | if (ident->raid_disks != UnSet && |
4b1ac34b | 238 | (!super || ident->raid_disks!= info.array.raid_disks)) { |
cd29a5c8 NB |
239 | if (inargv || verbose) |
240 | fprintf(stderr, Name ": %s requires wrong number of drives.\n", | |
241 | devname); | |
242 | continue; | |
243 | } | |
52826846 NB |
244 | |
245 | /* If we are this far, then we are commited to this device. | |
246 | * If the super_block doesn't exist, or doesn't match others, | |
247 | * then we cannot continue | |
248 | */ | |
52826846 | 249 | |
4b1ac34b | 250 | if (!super) { |
52826846 NB |
251 | fprintf(stderr, Name ": %s has no superblock - assembly aborted\n", |
252 | devname); | |
4b1ac34b | 253 | free(first_super); |
52826846 NB |
254 | return 1; |
255 | } | |
4b1ac34b | 256 | if (compare_super0(&first_super, super)) { |
52826846 NB |
257 | fprintf(stderr, Name ": superblock on %s doesn't match others - assembly aborted\n", |
258 | devname); | |
4b1ac34b NB |
259 | free(super); |
260 | free(first_super); | |
52826846 | 261 | return 1; |
64c4757e NB |
262 | } |
263 | ||
5787fa49 NB |
264 | /* looks like a good enough match to update the super block if needed */ |
265 | if (update) { | |
4b1ac34b NB |
266 | /* prepare useful information in info structures */ |
267 | struct stat stb2; | |
268 | fstat(mdfd, &stb2); | |
269 | info.array.md_minor = minor(stb2.st_rdev); | |
270 | ||
271 | update_super0(&info, super, update, devname, verbose); | |
272 | ||
d7eaf49f | 273 | dfd = open(devname, O_RDWR|O_EXCL, 0); |
5787fa49 NB |
274 | if (dfd < 0) |
275 | fprintf(stderr, Name ": Cannot open %s for superblock update\n", | |
276 | devname); | |
4b1ac34b | 277 | else if (store_super0(dfd, super)) |
5787fa49 NB |
278 | fprintf(stderr, Name ": Could not re-write superblock on %s.\n", |
279 | devname); | |
280 | if (dfd >= 0) | |
281 | close(dfd); | |
282 | } | |
283 | ||
cd29a5c8 NB |
284 | if (verbose) |
285 | fprintf(stderr, Name ": %s is identified as a member of %s, slot %d.\n", | |
4b1ac34b | 286 | devname, mddev, info.disk.raid_disk); |
64c4757e | 287 | devices[devcnt].devname = devname; |
0df46c2a NB |
288 | devices[devcnt].major = major(stb.st_rdev); |
289 | devices[devcnt].minor = minor(stb.st_rdev); | |
4b1ac34b NB |
290 | devices[devcnt].oldmajor = info.disk.major; |
291 | devices[devcnt].oldminor = info.disk.minor; | |
292 | devices[devcnt].events = info.events; | |
293 | devices[devcnt].raid_disk = info.disk.raid_disk; | |
64c4757e | 294 | devices[devcnt].uptodate = 0; |
4b1ac34b | 295 | devices[devcnt].state = info.disk.state; |
64c4757e NB |
296 | if (most_recent < devcnt) { |
297 | if (devices[devcnt].events | |
298 | > devices[most_recent].events) | |
299 | most_recent = devcnt; | |
300 | } | |
4b1ac34b | 301 | if (info.array.level == -4) |
5787fa49 NB |
302 | /* with multipath, the raid_disk from the superblock is meaningless */ |
303 | i = devcnt; | |
304 | else | |
305 | i = devices[devcnt].raid_disk; | |
98c6faba | 306 | if (i < 10000) { |
56eedc1a | 307 | if (i >= bestcnt) { |
98c6faba | 308 | unsigned int newbestcnt = i+10; |
56eedc1a | 309 | int *newbest = malloc(sizeof(int)*newbestcnt); |
98c6faba | 310 | unsigned int c; |
56eedc1a NB |
311 | for (c=0; c < newbestcnt; c++) |
312 | if (c < bestcnt) | |
313 | newbest[c] = best[c]; | |
314 | else | |
315 | newbest[c] = -1; | |
316 | if (best)free(best); | |
317 | best = newbest; | |
318 | bestcnt = newbestcnt; | |
319 | } | |
52826846 NB |
320 | if (best[i] == -1 |
321 | || devices[best[i]].events < devices[devcnt].events) | |
322 | best[i] = devcnt; | |
56eedc1a | 323 | } |
64c4757e NB |
324 | devcnt++; |
325 | } | |
326 | ||
4b1ac34b NB |
327 | if (super) |
328 | free(super); | |
329 | super = NULL; | |
330 | ||
64c4757e | 331 | if (devcnt == 0) { |
682c7051 | 332 | fprintf(stderr, Name ": no devices found for %s\n", |
64c4757e | 333 | mddev); |
4b1ac34b | 334 | free(first_super); |
64c4757e NB |
335 | return 1; |
336 | } | |
4b1ac34b NB |
337 | |
338 | getinfo_super0(&info, first_super); | |
339 | ||
64c4757e NB |
340 | /* now we have some devices that might be suitable. |
341 | * I wonder how many | |
342 | */ | |
343 | okcnt = 0; | |
52826846 | 344 | sparecnt=0; |
56eedc1a | 345 | for (i=0; i< bestcnt ;i++) { |
64c4757e | 346 | int j = best[i]; |
cd29a5c8 | 347 | int event_margin = !force; |
64c4757e | 348 | if (j < 0) continue; |
d013a55e NB |
349 | /* note: we ignore error flags in multipath arrays |
350 | * as they don't make sense | |
351 | */ | |
4b1ac34b | 352 | if (info.array.level != -4) |
aa88f531 NB |
353 | if (!(devices[j].state & (1<<MD_DISK_SYNC))) { |
354 | if (!(devices[j].state & (1<<MD_DISK_FAULTY))) | |
355 | sparecnt++; | |
d013a55e | 356 | continue; |
aa88f531 | 357 | } |
cd29a5c8 | 358 | if (devices[j].events+event_margin >= |
64c4757e NB |
359 | devices[most_recent].events) { |
360 | devices[j].uptodate = 1; | |
4b1ac34b | 361 | if (i < info.array.raid_disks) |
52826846 NB |
362 | okcnt++; |
363 | else | |
364 | sparecnt++; | |
64c4757e NB |
365 | } |
366 | } | |
4b1ac34b | 367 | while (force && !enough(info.array.level, info.array.raid_disks, okcnt)) { |
64c4757e NB |
368 | /* Choose the newest best drive which is |
369 | * not up-to-date, update the superblock | |
370 | * and add it. | |
371 | */ | |
52826846 | 372 | int fd; |
cd29a5c8 | 373 | chosen_drive = -1; |
4b1ac34b | 374 | for (i=0; i<info.array.raid_disks && i < bestcnt; i++) { |
52826846 NB |
375 | int j = best[i]; |
376 | if (j>=0 && | |
377 | !devices[j].uptodate && | |
378 | devices[j].events > 0 && | |
379 | (chosen_drive < 0 || | |
380 | devices[j].events > devices[chosen_drive].events)) | |
381 | chosen_drive = j; | |
382 | } | |
383 | if (chosen_drive < 0) | |
384 | break; | |
385 | fprintf(stderr, Name ": forcing event count in %s(%d) from %d upto %d\n", | |
386 | devices[chosen_drive].devname, devices[chosen_drive].raid_disk, | |
387 | (int)(devices[chosen_drive].events), | |
388 | (int)(devices[most_recent].events)); | |
d7eaf49f | 389 | fd = open(devices[chosen_drive].devname, O_RDWR|O_EXCL); |
52826846 NB |
390 | if (fd < 0) { |
391 | fprintf(stderr, Name ": Couldn't open %s for write - not updating\n", | |
392 | devices[chosen_drive].devname); | |
393 | devices[chosen_drive].events = 0; | |
394 | continue; | |
395 | } | |
4b1ac34b | 396 | if (load_super0(fd, &super, NULL)) { |
52826846 NB |
397 | close(fd); |
398 | fprintf(stderr, Name ": RAID superblock disappeared from %s - not updating.\n", | |
399 | devices[chosen_drive].devname); | |
400 | devices[chosen_drive].events = 0; | |
401 | continue; | |
402 | } | |
4b1ac34b NB |
403 | info.events = devices[most_recent].events; |
404 | update_super0(&info, super, "force", devices[chosen_drive].devname, verbose); | |
405 | ||
406 | if (store_super0(fd, super)) { | |
52826846 NB |
407 | close(fd); |
408 | fprintf(stderr, Name ": Could not re-write superblock on %s\n", | |
409 | devices[chosen_drive].devname); | |
410 | devices[chosen_drive].events = 0; | |
4b1ac34b | 411 | free(super); |
52826846 NB |
412 | continue; |
413 | } | |
414 | close(fd); | |
415 | devices[chosen_drive].events = devices[most_recent].events; | |
416 | devices[chosen_drive].uptodate = 1; | |
417 | okcnt++; | |
4b1ac34b | 418 | free(super); |
64c4757e | 419 | } |
52826846 NB |
420 | |
421 | /* Now we want to look at the superblock which the kernel will base things on | |
422 | * and compare the devices that we think are working with the devices that the | |
423 | * superblock thinks are working. | |
424 | * If there are differences and --force is given, then update this chosen | |
425 | * superblock. | |
426 | */ | |
cd29a5c8 | 427 | chosen_drive = -1; |
4b1ac34b | 428 | super = NULL; |
56eedc1a | 429 | for (i=0; chosen_drive < 0 && i<bestcnt; i++) { |
52826846 NB |
430 | int j = best[i]; |
431 | int fd; | |
4b1ac34b | 432 | |
52826846 NB |
433 | if (j<0) |
434 | continue; | |
435 | if (!devices[j].uptodate) | |
436 | continue; | |
437 | chosen_drive = j; | |
d7eaf49f | 438 | if ((fd=open(devices[j].devname, O_RDONLY|O_EXCL))< 0) { |
52826846 NB |
439 | fprintf(stderr, Name ": Cannot open %s: %s\n", |
440 | devices[j].devname, strerror(errno)); | |
441 | return 1; | |
442 | } | |
4b1ac34b | 443 | if (load_super0(fd, &super, NULL)) { |
52826846 NB |
444 | close(fd); |
445 | fprintf(stderr, Name ": RAID superblock has disappeared from %s\n", | |
446 | devices[j].devname); | |
447 | return 1; | |
448 | } | |
449 | close(fd); | |
450 | } | |
4b1ac34b NB |
451 | if (super == NULL) { |
452 | fprintf(stderr, Name ": No suitable drives found for %s\n", mddev); | |
453 | return 1; | |
454 | } | |
455 | getinfo_super0(&info, super); | |
56eedc1a | 456 | for (i=0; i<bestcnt; i++) { |
52826846 | 457 | int j = best[i]; |
98c6faba | 458 | unsigned int desired_state; |
11a3e71d | 459 | |
4b1ac34b | 460 | if (i < info.array.raid_disks) |
11a3e71d NB |
461 | desired_state = (1<<MD_DISK_ACTIVE) | (1<<MD_DISK_SYNC); |
462 | else | |
463 | desired_state = 0; | |
464 | ||
52826846 NB |
465 | if (j<0) |
466 | continue; | |
467 | if (!devices[j].uptodate) | |
468 | continue; | |
4b1ac34b NB |
469 | info.disk.number = i; |
470 | info.disk.state = desired_state; | |
471 | ||
52826846 | 472 | if (devices[j].uptodate && |
4b1ac34b | 473 | update_super0(&info, super, "assemble", NULL, 0)) { |
52826846 NB |
474 | if (force) { |
475 | fprintf(stderr, Name ": " | |
cd29a5c8 | 476 | "clearing FAULTY flag for device %d in %s for %s\n", |
52826846 | 477 | j, mddev, devices[j].devname); |
4b1ac34b | 478 | change = 1; |
52826846 NB |
479 | } else { |
480 | fprintf(stderr, Name ": " | |
11a3e71d | 481 | "device %d in %s has wrong state in superblock, but %s seems ok\n", |
52826846 NB |
482 | i, mddev, devices[j].devname); |
483 | } | |
484 | } | |
4b1ac34b | 485 | #if 0 |
52826846 NB |
486 | if (!devices[j].uptodate && |
487 | !(super.disks[i].state & (1 << MD_DISK_FAULTY))) { | |
488 | fprintf(stderr, Name ": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n", | |
489 | i, mddev); | |
490 | } | |
4b1ac34b | 491 | #endif |
52826846 | 492 | } |
4b1ac34b NB |
493 | if (force && okcnt == info.array.raid_disks-1) { |
494 | /* FIXME check event count */ | |
495 | change += update_super0(&info, super, "force", | |
496 | devices[chosen_drive].devname, 0); | |
d013a55e | 497 | } |
52826846 | 498 | |
4b1ac34b | 499 | if (change) { |
52826846 | 500 | int fd; |
d7eaf49f | 501 | fd = open(devices[chosen_drive].devname, O_RDWR|O_EXCL); |
52826846 NB |
502 | if (fd < 0) { |
503 | fprintf(stderr, Name ": Could open %s for write - cannot Assemble array.\n", | |
504 | devices[chosen_drive].devname); | |
505 | return 1; | |
506 | } | |
4b1ac34b | 507 | if (store_super0(fd, super)) { |
52826846 NB |
508 | close(fd); |
509 | fprintf(stderr, Name ": Could not re-write superblock on %s\n", | |
510 | devices[chosen_drive].devname); | |
511 | return 1; | |
512 | } | |
513 | close(fd); | |
52826846 NB |
514 | } |
515 | ||
aa88f531 NB |
516 | /* count number of in-sync devices according to the superblock. |
517 | * We must have this number to start the array without -s or -R | |
518 | */ | |
4b1ac34b | 519 | req_cnt = info.array.working_disks; |
aa88f531 | 520 | |
64c4757e NB |
521 | /* Almost ready to actually *do* something */ |
522 | if (!old_linux) { | |
523 | if (ioctl(mdfd, SET_ARRAY_INFO, NULL) != 0) { | |
682c7051 | 524 | fprintf(stderr, Name ": SET_ARRAY_INFO failed for %s: %s\n", |
64c4757e NB |
525 | mddev, strerror(errno)); |
526 | return 1; | |
527 | } | |
52826846 | 528 | /* First, add the raid disks, but add the chosen one last */ |
56eedc1a | 529 | for (i=0; i<= bestcnt; i++) { |
52826846 | 530 | int j; |
56eedc1a | 531 | if (i < bestcnt) { |
52826846 NB |
532 | j = best[i]; |
533 | if (j == chosen_drive) | |
534 | continue; | |
535 | } else | |
536 | j = chosen_drive; | |
537 | ||
56eedc1a | 538 | if (j >= 0 /* && devices[j].uptodate */) { |
64c4757e NB |
539 | mdu_disk_info_t disk; |
540 | memset(&disk, 0, sizeof(disk)); | |
541 | disk.major = devices[j].major; | |
542 | disk.minor = devices[j].minor; | |
543 | if (ioctl(mdfd, ADD_NEW_DISK, &disk)!=0) { | |
682c7051 | 544 | fprintf(stderr, Name ": failed to add %s to %s: %s\n", |
64c4757e NB |
545 | devices[j].devname, |
546 | mddev, | |
547 | strerror(errno)); | |
4b1ac34b | 548 | if (i < info.array.raid_disks || i == bestcnt) |
52826846 NB |
549 | okcnt--; |
550 | else | |
551 | sparecnt--; | |
552 | } else if (verbose) | |
553 | fprintf(stderr, Name ": added %s to %s as %d\n", | |
554 | devices[j].devname, mddev, devices[j].raid_disk); | |
4b1ac34b | 555 | } else if (verbose && i < info.array.raid_disks) |
682c7051 | 556 | fprintf(stderr, Name ": no uptodate device for slot %d of %s\n", |
64c4757e NB |
557 | i, mddev); |
558 | } | |
52826846 | 559 | |
64c4757e NB |
560 | if (runstop == 1 || |
561 | (runstop == 0 && | |
4b1ac34b | 562 | ( enough(info.array.level, info.array.raid_disks, okcnt) && |
aa88f531 NB |
563 | (okcnt >= req_cnt || start_partial_ok) |
564 | ))) { | |
82b27616 | 565 | if (ioctl(mdfd, RUN_ARRAY, NULL)==0) { |
52826846 NB |
566 | fprintf(stderr, Name ": %s has been started with %d drive%s", |
567 | mddev, okcnt, okcnt==1?"":"s"); | |
4b1ac34b NB |
568 | if (okcnt < info.array.raid_disks) |
569 | fprintf(stderr, " (out of %d)", info.array.raid_disks); | |
52826846 NB |
570 | if (sparecnt) |
571 | fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s"); | |
572 | fprintf(stderr, ".\n"); | |
64c4757e | 573 | return 0; |
82b27616 | 574 | } |
682c7051 | 575 | fprintf(stderr, Name ": failed to RUN_ARRAY %s: %s\n", |
64c4757e NB |
576 | mddev, strerror(errno)); |
577 | return 1; | |
578 | } | |
82b27616 | 579 | if (runstop == -1) { |
52826846 NB |
580 | fprintf(stderr, Name ": %s assembled from %d drive%s, but not started.\n", |
581 | mddev, okcnt, okcnt==1?"":"s"); | |
64c4757e | 582 | return 0; |
82b27616 | 583 | } |
aa88f531 NB |
584 | fprintf(stderr, Name ": %s assembled from %d drive%s", mddev, okcnt, okcnt==1?"":"s"); |
585 | if (sparecnt) | |
586 | fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s"); | |
4b1ac34b | 587 | if (!enough(info.array.level, info.array.raid_disks, okcnt)) |
aa88f531 NB |
588 | fprintf(stderr, " - not enough to start the array.\n"); |
589 | else { | |
4b1ac34b | 590 | if (req_cnt == info.array.raid_disks) |
aa88f531 NB |
591 | fprintf(stderr, " - need all %d to start it", req_cnt); |
592 | else | |
4b1ac34b | 593 | fprintf(stderr, " - need %d of %d to start", req_cnt, info.array.raid_disks); |
aa88f531 NB |
594 | fprintf(stderr, " (use --run to insist).\n"); |
595 | } | |
64c4757e | 596 | return 1; |
82b27616 | 597 | } else { |
52826846 NB |
598 | /* The "chosen_drive" is a good choice, and if necessary, the superblock has |
599 | * been updated to point to the current locations of devices. | |
600 | * so we can just start the array | |
82b27616 | 601 | */ |
cd29a5c8 | 602 | unsigned long dev; |
0df46c2a | 603 | dev = makedev(devices[chosen_drive].major, |
82b27616 NB |
604 | devices[chosen_drive].minor); |
605 | if (ioctl(mdfd, START_ARRAY, dev)) { | |
606 | fprintf(stderr, Name ": Cannot start array: %s\n", | |
607 | strerror(errno)); | |
608 | } | |
609 | ||
64c4757e | 610 | } |
e0d19036 | 611 | return 0; |
64c4757e | 612 | } |