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Commit | Line | Data |
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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 | 31 | #include "md_u.h" |
52826846 | 32 | #include "md_p.h" |
64c4757e NB |
33 | |
34 | int Assemble(char *mddev, int mdfd, | |
52826846 | 35 | mddev_ident_t ident, char *conffile, |
cd29a5c8 | 36 | mddev_dev_t devlist, |
64c4757e NB |
37 | int readonly, int runstop, |
38 | int verbose, int force) | |
39 | { | |
40 | /* | |
52826846 NB |
41 | * The task of Assemble is to find a collection of |
42 | * devices that should (according to their superblocks) | |
43 | * form an array, and to give this collection to the MD driver. | |
44 | * In Linux-2.4 and later, this involves submitting a | |
64c4757e NB |
45 | * SET_ARRAY_INFO ioctl with no arg - to prepare |
46 | * the array - and then submit a number of | |
47 | * ADD_NEW_DISK ioctls to add disks into | |
48 | * the array. Finally RUN_ARRAY might | |
49 | * be submitted to start the array. | |
50 | * | |
51 | * Much of the work of Assemble is in finding and/or | |
52 | * checking the disks to make sure they look right. | |
53 | * | |
54 | * If mddev is not set, then scan must be and we | |
55 | * read through the config file for dev+uuid mapping | |
56 | * We recurse, setting mddev, for each device that | |
57 | * - isn't running | |
58 | * - has a valid uuid (or any uuid if !uuidset | |
59 | * | |
60 | * If mddev is set, we try to determine state of md. | |
61 | * check version - must be at least 0.90.0 | |
62 | * check kernel version. must be at least 2.4. | |
63 | * If not, we can possibly fall back on START_ARRAY | |
64 | * Try to GET_ARRAY_INFO. | |
65 | * If possible, give up | |
66 | * If not, try to STOP_ARRAY just to make sure | |
67 | * | |
68 | * If !uuidset and scan, look in conf-file for uuid | |
69 | * If not found, give up | |
cd29a5c8 | 70 | * If !devlist and scan and uuidset, get list of devs from conf-file |
64c4757e NB |
71 | * |
72 | * For each device: | |
73 | * Check superblock - discard if bad | |
74 | * Check uuid (set if we don't have one) - discard if no match | |
75 | * Check superblock similarity if we have a superbloc - discard if different | |
76 | * Record events, devicenum, utime | |
77 | * This should give us a list of devices for the array | |
78 | * We should collect the most recent event and utime numbers | |
79 | * | |
80 | * Count disks with recent enough event count | |
81 | * While force && !enough disks | |
82 | * Choose newest rejected disks, update event count | |
83 | * mark clean and rewrite superblock | |
84 | * If recent kernel: | |
85 | * SET_ARRAY_INFO | |
86 | * foreach device with recent events : ADD_NEW_DISK | |
87 | * if runstop == 1 || "enough" disks and runstop==0 -> RUN_ARRAY | |
88 | * If old kernel: | |
89 | * Check the device numbers in superblock are right | |
90 | * update superblock if any changes | |
91 | * START_ARRAY | |
92 | * | |
93 | */ | |
94 | int old_linux = 0; | |
95 | int vers; | |
96 | mdu_array_info_t array; | |
64c4757e NB |
97 | mdp_super_t first_super, super; |
98 | struct { | |
99 | char *devname; | |
100 | int major, minor; | |
11a3e71d | 101 | int oldmajor, oldminor; |
64c4757e NB |
102 | long long events; |
103 | time_t utime; | |
104 | int uptodate; | |
52826846 | 105 | int raid_disk; |
64c4757e NB |
106 | } devices[MD_SB_DISKS]; |
107 | int best[MD_SB_DISKS]; /* indexed by raid_disk */ | |
52826846 | 108 | int devcnt = 0, okcnt, sparecnt; |
64c4757e NB |
109 | int i; |
110 | int most_recent = 0; | |
cd29a5c8 | 111 | int chosen_drive; |
52826846 | 112 | int change = 0; |
cd29a5c8 NB |
113 | int inargv = 0; |
114 | int start_partial_ok = force || devlist==NULL; | |
64c4757e | 115 | |
64c4757e NB |
116 | vers = md_get_version(mdfd); |
117 | if (vers <= 0) { | |
e0d19036 | 118 | fprintf(stderr, Name ": %s appears not to be an md device.\n", mddev); |
64c4757e NB |
119 | return 1; |
120 | } | |
682c7051 NB |
121 | if (vers < 9000) { |
122 | fprintf(stderr, Name ": Assemble requires driver version 0.90.0 or later.\n" | |
52826846 | 123 | " Upgrade your kernel or try --build\n"); |
64c4757e NB |
124 | return 1; |
125 | } | |
682c7051 | 126 | if (get_linux_version() < 2004000) |
64c4757e NB |
127 | old_linux = 1; |
128 | ||
129 | if (ioctl(mdfd, GET_ARRAY_INFO, &array)>=0) { | |
682c7051 | 130 | fprintf(stderr, Name ": device %s already active - cannot assemble it\n", |
64c4757e NB |
131 | mddev); |
132 | return 1; | |
133 | } | |
134 | ioctl(mdfd, STOP_ARRAY, NULL); /* just incase it was started but has no content */ | |
135 | ||
136 | /* | |
52826846 NB |
137 | * If any subdevs are listed, then any that don't |
138 | * match ident are discarded. Remainder must all match and | |
139 | * become the array. | |
140 | * If no subdevs, then we scan all devices in the config file, but | |
141 | * there must be something in the identity | |
64c4757e | 142 | */ |
64c4757e | 143 | |
cd29a5c8 | 144 | if (!devlist && |
52826846 NB |
145 | ident->uuid_set == 0 && |
146 | ident->super_minor < 0 && | |
147 | ident->devices == NULL) { | |
148 | fprintf(stderr, Name ": No identity information available for %s - cannot assemble.\n", | |
149 | mddev); | |
150 | return 1; | |
64c4757e | 151 | } |
cd29a5c8 | 152 | if (devlist == NULL) |
64c4757e | 153 | devlist = conf_get_devs(conffile); |
cd29a5c8 | 154 | else inargv = 1; |
64c4757e | 155 | |
64c4757e NB |
156 | first_super.md_magic = 0; |
157 | for (i=0; i<MD_SB_DISKS; i++) | |
158 | best[i] = -1; | |
159 | ||
82b27616 NB |
160 | if (verbose) |
161 | fprintf(stderr, Name ": looking for devices for %s\n", | |
162 | mddev); | |
163 | ||
cd29a5c8 | 164 | while ( devlist) { |
64c4757e NB |
165 | char *devname; |
166 | int this_uuid[4]; | |
167 | int dfd; | |
168 | struct stat stb; | |
52826846 NB |
169 | int havesuper=0; |
170 | ||
cd29a5c8 NB |
171 | devname = devlist->devname; |
172 | devlist = devlist->next; | |
64c4757e | 173 | |
52826846 NB |
174 | if (ident->devices && |
175 | !match_oneof(ident->devices, devname)) | |
176 | continue; | |
177 | ||
64c4757e NB |
178 | dfd = open(devname, O_RDONLY, 0); |
179 | if (dfd < 0) { | |
180 | if (inargv || verbose) | |
682c7051 | 181 | fprintf(stderr, Name ": cannot open device %s: %s\n", |
64c4757e | 182 | devname, strerror(errno)); |
52826846 NB |
183 | } else if (fstat(dfd, &stb)< 0) { |
184 | /* Impossible! */ | |
185 | fprintf(stderr, Name ": fstat failed for %s: %s\n", | |
186 | devname, strerror(errno)); | |
187 | close(dfd); | |
cd29a5c8 NB |
188 | } else if ((stb.st_mode & S_IFMT) != S_IFBLK) { |
189 | fprintf(stderr, Name ": %s is not a block device.\n", | |
52826846 NB |
190 | devname); |
191 | close(dfd); | |
cd29a5c8 | 192 | } else if (load_super(dfd, &super)) { |
64c4757e | 193 | if (inargv || verbose) |
682c7051 | 194 | fprintf( stderr, Name ": no RAID superblock on %s\n", |
64c4757e NB |
195 | devname); |
196 | close(dfd); | |
52826846 NB |
197 | } else { |
198 | havesuper =1; | |
199 | uuid_from_super(this_uuid, &super); | |
200 | close(dfd); | |
64c4757e | 201 | } |
52826846 NB |
202 | |
203 | if (ident->uuid_set && | |
204 | (!havesuper || same_uuid(this_uuid, ident->uuid)==0)) { | |
205 | if (inargv || verbose) | |
206 | fprintf(stderr, Name ": %s has wrong uuid.\n", | |
207 | devname); | |
208 | continue; | |
82b27616 | 209 | } |
52826846 NB |
210 | if (ident->super_minor >= 0 && |
211 | (!havesuper || ident->super_minor != super.md_minor)) { | |
64c4757e | 212 | if (inargv || verbose) |
52826846 | 213 | fprintf(stderr, Name ": %s has wrong super-minor.\n", |
64c4757e NB |
214 | devname); |
215 | continue; | |
216 | } | |
cd29a5c8 NB |
217 | if (ident->level != -10 && |
218 | (!havesuper|| ident->level != super.level)) { | |
219 | if (inargv || verbose) | |
220 | fprintf(stderr, Name ": %s has wrong raid level.\n", | |
221 | devname); | |
222 | continue; | |
223 | } | |
224 | if (ident->raid_disks != -1 && | |
225 | (!havesuper || ident->raid_disks!= super.raid_disks)) { | |
226 | if (inargv || verbose) | |
227 | fprintf(stderr, Name ": %s requires wrong number of drives.\n", | |
228 | devname); | |
229 | continue; | |
230 | } | |
52826846 NB |
231 | |
232 | /* If we are this far, then we are commited to this device. | |
233 | * If the super_block doesn't exist, or doesn't match others, | |
234 | * then we cannot continue | |
235 | */ | |
52826846 NB |
236 | |
237 | if (!havesuper) { | |
238 | fprintf(stderr, Name ": %s has no superblock - assembly aborted\n", | |
239 | devname); | |
240 | return 1; | |
241 | } | |
242 | if (compare_super(&first_super, &super)) { | |
243 | fprintf(stderr, Name ": superblock on %s doesn't match others - assembly aborted\n", | |
244 | devname); | |
245 | return 1; | |
64c4757e NB |
246 | } |
247 | ||
64c4757e | 248 | if (devcnt >= MD_SB_DISKS) { |
682c7051 | 249 | fprintf(stderr, Name ": ouch - too many devices appear to be in this array. Ignoring %s\n", |
64c4757e NB |
250 | devname); |
251 | continue; | |
252 | } | |
cd29a5c8 NB |
253 | if (verbose) |
254 | fprintf(stderr, Name ": %s is identified as a member of %s, slot %d.\n", | |
255 | devname, mddev, super.this_disk.raid_disk); | |
64c4757e NB |
256 | devices[devcnt].devname = devname; |
257 | devices[devcnt].major = MAJOR(stb.st_rdev); | |
258 | devices[devcnt].minor = MINOR(stb.st_rdev); | |
11a3e71d NB |
259 | devices[devcnt].oldmajor = super.this_disk.major; |
260 | devices[devcnt].oldminor = super.this_disk.minor; | |
64c4757e NB |
261 | devices[devcnt].events = md_event(&super); |
262 | devices[devcnt].utime = super.utime; | |
52826846 | 263 | devices[devcnt].raid_disk = super.this_disk.raid_disk; |
64c4757e NB |
264 | devices[devcnt].uptodate = 0; |
265 | if (most_recent < devcnt) { | |
266 | if (devices[devcnt].events | |
267 | > devices[most_recent].events) | |
268 | most_recent = devcnt; | |
269 | } | |
52826846 NB |
270 | i = devices[devcnt].raid_disk; |
271 | if (i>=0 && i < MD_SB_DISKS) | |
272 | if (best[i] == -1 | |
273 | || devices[best[i]].events < devices[devcnt].events) | |
274 | best[i] = devcnt; | |
275 | ||
64c4757e NB |
276 | devcnt++; |
277 | } | |
278 | ||
279 | if (devcnt == 0) { | |
682c7051 | 280 | fprintf(stderr, Name ": no devices found for %s\n", |
64c4757e NB |
281 | mddev); |
282 | return 1; | |
283 | } | |
284 | /* now we have some devices that might be suitable. | |
285 | * I wonder how many | |
286 | */ | |
287 | okcnt = 0; | |
52826846 NB |
288 | sparecnt=0; |
289 | for (i=0; i< MD_SB_DISKS;i++) { | |
64c4757e | 290 | int j = best[i]; |
cd29a5c8 | 291 | int event_margin = !force; |
64c4757e | 292 | if (j < 0) continue; |
cd29a5c8 | 293 | if (devices[j].events+event_margin >= |
64c4757e NB |
294 | devices[most_recent].events) { |
295 | devices[j].uptodate = 1; | |
52826846 NB |
296 | if (i < first_super.raid_disks) |
297 | okcnt++; | |
298 | else | |
299 | sparecnt++; | |
64c4757e NB |
300 | } |
301 | } | |
302 | while (force && !enough(first_super.level, first_super.raid_disks, okcnt)) { | |
303 | /* Choose the newest best drive which is | |
304 | * not up-to-date, update the superblock | |
305 | * and add it. | |
306 | */ | |
52826846 | 307 | int fd; |
cd29a5c8 | 308 | chosen_drive = -1; |
52826846 NB |
309 | for (i=0; i<first_super.raid_disks; i++) { |
310 | int j = best[i]; | |
311 | if (j>=0 && | |
312 | !devices[j].uptodate && | |
313 | devices[j].events > 0 && | |
314 | (chosen_drive < 0 || | |
315 | devices[j].events > devices[chosen_drive].events)) | |
316 | chosen_drive = j; | |
317 | } | |
318 | if (chosen_drive < 0) | |
319 | break; | |
320 | fprintf(stderr, Name ": forcing event count in %s(%d) from %d upto %d\n", | |
321 | devices[chosen_drive].devname, devices[chosen_drive].raid_disk, | |
322 | (int)(devices[chosen_drive].events), | |
323 | (int)(devices[most_recent].events)); | |
324 | fd = open(devices[chosen_drive].devname, O_RDWR); | |
325 | if (fd < 0) { | |
326 | fprintf(stderr, Name ": Couldn't open %s for write - not updating\n", | |
327 | devices[chosen_drive].devname); | |
328 | devices[chosen_drive].events = 0; | |
329 | continue; | |
330 | } | |
331 | if (load_super(fd, &super)) { | |
332 | close(fd); | |
333 | fprintf(stderr, Name ": RAID superblock disappeared from %s - not updating.\n", | |
334 | devices[chosen_drive].devname); | |
335 | devices[chosen_drive].events = 0; | |
336 | continue; | |
337 | } | |
338 | super.events_hi = (devices[most_recent].events>>32)&0xFFFFFFFF; | |
339 | super.events_lo = (devices[most_recent].events)&0xFFFFFFFF; | |
340 | super.sb_csum = calc_sb_csum(&super); | |
341 | /*DRYRUN*/ if (store_super(fd, &super)) { | |
342 | close(fd); | |
343 | fprintf(stderr, Name ": Could not re-write superblock on %s\n", | |
344 | devices[chosen_drive].devname); | |
345 | devices[chosen_drive].events = 0; | |
346 | continue; | |
347 | } | |
348 | close(fd); | |
349 | devices[chosen_drive].events = devices[most_recent].events; | |
350 | devices[chosen_drive].uptodate = 1; | |
351 | okcnt++; | |
64c4757e | 352 | } |
52826846 NB |
353 | |
354 | /* Now we want to look at the superblock which the kernel will base things on | |
355 | * and compare the devices that we think are working with the devices that the | |
356 | * superblock thinks are working. | |
357 | * If there are differences and --force is given, then update this chosen | |
358 | * superblock. | |
359 | */ | |
cd29a5c8 | 360 | chosen_drive = -1; |
52826846 NB |
361 | for (i=0; chosen_drive < 0 && i<MD_SB_DISKS; i++) { |
362 | int j = best[i]; | |
363 | int fd; | |
364 | if (j<0) | |
365 | continue; | |
366 | if (!devices[j].uptodate) | |
367 | continue; | |
368 | chosen_drive = j; | |
369 | if ((fd=open(devices[j].devname, O_RDONLY))< 0) { | |
370 | fprintf(stderr, Name ": Cannot open %s: %s\n", | |
371 | devices[j].devname, strerror(errno)); | |
372 | return 1; | |
373 | } | |
374 | if (load_super(fd, &super)) { | |
375 | close(fd); | |
376 | fprintf(stderr, Name ": RAID superblock has disappeared from %s\n", | |
377 | devices[j].devname); | |
378 | return 1; | |
379 | } | |
380 | close(fd); | |
381 | } | |
382 | ||
383 | for (i=0; i<MD_SB_DISKS; i++) { | |
384 | int j = best[i]; | |
11a3e71d NB |
385 | int desired_state; |
386 | ||
387 | if (i < super.raid_disks) | |
388 | desired_state = (1<<MD_DISK_ACTIVE) | (1<<MD_DISK_SYNC); | |
389 | else | |
390 | desired_state = 0; | |
391 | ||
52826846 NB |
392 | if (j<0) |
393 | continue; | |
394 | if (!devices[j].uptodate) | |
395 | continue; | |
11a3e71d NB |
396 | #if 0 |
397 | This doesnt work yet | |
398 | if (devices[j].major != super.disks[i].major || | |
399 | devices[j].minor != super.disks[i].minor) { | |
52826846 | 400 | change |= 1; |
11a3e71d NB |
401 | super.disks[i].major = devices[j].major; |
402 | super.disks[i].minor = devices[j].minor; | |
403 | } | |
404 | #endif | |
405 | if (devices[j].oldmajor != super.disks[i].major || | |
406 | devices[j].oldminor != super.disks[i].minor) { | |
407 | change |= 2; | |
e0d19036 NB |
408 | super.disks[i].major = devices[j].oldmajor; |
409 | super.disks[i].minor = devices[j].oldminor; | |
52826846 NB |
410 | } |
411 | if (devices[j].uptodate && | |
11a3e71d | 412 | (super.disks[i].state != desired_state)) { |
52826846 NB |
413 | if (force) { |
414 | fprintf(stderr, Name ": " | |
cd29a5c8 | 415 | "clearing FAULTY flag for device %d in %s for %s\n", |
52826846 | 416 | j, mddev, devices[j].devname); |
11a3e71d | 417 | super.disks[i].state = desired_state; |
52826846 NB |
418 | change |= 2; |
419 | } else { | |
420 | fprintf(stderr, Name ": " | |
11a3e71d | 421 | "device %d in %s has wrong state in superblock, but %s seems ok\n", |
52826846 NB |
422 | i, mddev, devices[j].devname); |
423 | } | |
424 | } | |
425 | if (!devices[j].uptodate && | |
426 | !(super.disks[i].state & (1 << MD_DISK_FAULTY))) { | |
427 | fprintf(stderr, Name ": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n", | |
428 | i, mddev); | |
429 | } | |
430 | } | |
431 | ||
432 | if ((force && (change & 2)) | |
433 | || (old_linux && (change & 1))) { | |
434 | int fd; | |
435 | super.sb_csum = calc_sb_csum(&super); | |
436 | fd = open(devices[chosen_drive].devname, O_RDWR); | |
437 | if (fd < 0) { | |
438 | fprintf(stderr, Name ": Could open %s for write - cannot Assemble array.\n", | |
439 | devices[chosen_drive].devname); | |
440 | return 1; | |
441 | } | |
442 | if (store_super(fd, &super)) { | |
443 | close(fd); | |
444 | fprintf(stderr, Name ": Could not re-write superblock on %s\n", | |
445 | devices[chosen_drive].devname); | |
446 | return 1; | |
447 | } | |
448 | close(fd); | |
449 | change = 0; | |
450 | } | |
451 | ||
64c4757e NB |
452 | /* Almost ready to actually *do* something */ |
453 | if (!old_linux) { | |
454 | if (ioctl(mdfd, SET_ARRAY_INFO, NULL) != 0) { | |
682c7051 | 455 | fprintf(stderr, Name ": SET_ARRAY_INFO failed for %s: %s\n", |
64c4757e NB |
456 | mddev, strerror(errno)); |
457 | return 1; | |
458 | } | |
52826846 NB |
459 | /* First, add the raid disks, but add the chosen one last */ |
460 | for (i=0; i<=MD_SB_DISKS; i++) { | |
461 | int j; | |
462 | if (i < MD_SB_DISKS) { | |
463 | j = best[i]; | |
464 | if (j == chosen_drive) | |
465 | continue; | |
466 | } else | |
467 | j = chosen_drive; | |
468 | ||
0db17fcb | 469 | if (j >= 0 && devices[j].uptodate) { |
64c4757e NB |
470 | mdu_disk_info_t disk; |
471 | memset(&disk, 0, sizeof(disk)); | |
472 | disk.major = devices[j].major; | |
473 | disk.minor = devices[j].minor; | |
474 | if (ioctl(mdfd, ADD_NEW_DISK, &disk)!=0) { | |
682c7051 | 475 | fprintf(stderr, Name ": failed to add %s to %s: %s\n", |
64c4757e NB |
476 | devices[j].devname, |
477 | mddev, | |
478 | strerror(errno)); | |
52826846 NB |
479 | if (i < first_super.raid_disks) |
480 | okcnt--; | |
481 | else | |
482 | sparecnt--; | |
483 | } else if (verbose) | |
484 | fprintf(stderr, Name ": added %s to %s as %d\n", | |
485 | devices[j].devname, mddev, devices[j].raid_disk); | |
486 | } else if (verbose && i < first_super.raid_disks) | |
682c7051 | 487 | fprintf(stderr, Name ": no uptodate device for slot %d of %s\n", |
64c4757e NB |
488 | i, mddev); |
489 | } | |
52826846 | 490 | |
64c4757e NB |
491 | if (runstop == 1 || |
492 | (runstop == 0 && | |
cd29a5c8 | 493 | ( first_super.raid_disks == okcnt |
e0d19036 | 494 | || (start_partial_ok && enough(first_super.level, first_super.raid_disks, okcnt))) |
cd29a5c8 | 495 | )) { |
82b27616 | 496 | if (ioctl(mdfd, RUN_ARRAY, NULL)==0) { |
52826846 NB |
497 | fprintf(stderr, Name ": %s has been started with %d drive%s", |
498 | mddev, okcnt, okcnt==1?"":"s"); | |
499 | if (sparecnt) | |
500 | fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s"); | |
501 | fprintf(stderr, ".\n"); | |
64c4757e | 502 | return 0; |
82b27616 | 503 | } |
682c7051 | 504 | fprintf(stderr, Name ": failed to RUN_ARRAY %s: %s\n", |
64c4757e NB |
505 | mddev, strerror(errno)); |
506 | return 1; | |
507 | } | |
82b27616 | 508 | if (runstop == -1) { |
52826846 NB |
509 | fprintf(stderr, Name ": %s assembled from %d drive%s, but not started.\n", |
510 | mddev, okcnt, okcnt==1?"":"s"); | |
64c4757e | 511 | return 0; |
82b27616 | 512 | } |
cd29a5c8 | 513 | fprintf(stderr, Name ": %s assembled from %d drive%s - not enough to start it (use --run to insist).\n", |
52826846 | 514 | mddev, okcnt, okcnt==1?"":"s"); |
64c4757e | 515 | return 1; |
82b27616 | 516 | } else { |
52826846 NB |
517 | /* The "chosen_drive" is a good choice, and if necessary, the superblock has |
518 | * been updated to point to the current locations of devices. | |
519 | * so we can just start the array | |
82b27616 | 520 | */ |
cd29a5c8 | 521 | unsigned long dev; |
82b27616 NB |
522 | dev = MKDEV(devices[chosen_drive].major, |
523 | devices[chosen_drive].minor); | |
524 | if (ioctl(mdfd, START_ARRAY, dev)) { | |
525 | fprintf(stderr, Name ": Cannot start array: %s\n", | |
526 | strerror(errno)); | |
527 | } | |
528 | ||
64c4757e | 529 | } |
e0d19036 | 530 | return 0; |
64c4757e | 531 | } |