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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 | 37 | int readonly, int runstop, |
5787fa49 | 38 | char *update, |
64c4757e NB |
39 | int verbose, int force) |
40 | { | |
41 | /* | |
52826846 NB |
42 | * The task of Assemble is to find a collection of |
43 | * devices that should (according to their superblocks) | |
44 | * form an array, and to give this collection to the MD driver. | |
45 | * In Linux-2.4 and later, this involves submitting a | |
64c4757e NB |
46 | * SET_ARRAY_INFO ioctl with no arg - to prepare |
47 | * the array - and then submit a number of | |
48 | * ADD_NEW_DISK ioctls to add disks into | |
49 | * the array. Finally RUN_ARRAY might | |
50 | * be submitted to start the array. | |
51 | * | |
52 | * Much of the work of Assemble is in finding and/or | |
53 | * checking the disks to make sure they look right. | |
54 | * | |
55 | * If mddev is not set, then scan must be and we | |
56 | * read through the config file for dev+uuid mapping | |
57 | * We recurse, setting mddev, for each device that | |
58 | * - isn't running | |
59 | * - has a valid uuid (or any uuid if !uuidset | |
60 | * | |
61 | * If mddev is set, we try to determine state of md. | |
62 | * check version - must be at least 0.90.0 | |
63 | * check kernel version. must be at least 2.4. | |
64 | * If not, we can possibly fall back on START_ARRAY | |
65 | * Try to GET_ARRAY_INFO. | |
66 | * If possible, give up | |
67 | * If not, try to STOP_ARRAY just to make sure | |
68 | * | |
69 | * If !uuidset and scan, look in conf-file for uuid | |
70 | * If not found, give up | |
cd29a5c8 | 71 | * If !devlist and scan and uuidset, get list of devs from conf-file |
64c4757e NB |
72 | * |
73 | * For each device: | |
74 | * Check superblock - discard if bad | |
75 | * Check uuid (set if we don't have one) - discard if no match | |
5787fa49 | 76 | * Check superblock similarity if we have a superblock - discard if different |
64c4757e NB |
77 | * Record events, devicenum, utime |
78 | * This should give us a list of devices for the array | |
79 | * We should collect the most recent event and utime numbers | |
80 | * | |
81 | * Count disks with recent enough event count | |
82 | * While force && !enough disks | |
83 | * Choose newest rejected disks, update event count | |
84 | * mark clean and rewrite superblock | |
85 | * If recent kernel: | |
86 | * SET_ARRAY_INFO | |
87 | * foreach device with recent events : ADD_NEW_DISK | |
88 | * if runstop == 1 || "enough" disks and runstop==0 -> RUN_ARRAY | |
89 | * If old kernel: | |
90 | * Check the device numbers in superblock are right | |
91 | * update superblock if any changes | |
92 | * START_ARRAY | |
93 | * | |
94 | */ | |
95 | int old_linux = 0; | |
96 | int vers; | |
97 | mdu_array_info_t array; | |
64c4757e NB |
98 | mdp_super_t first_super, super; |
99 | struct { | |
100 | char *devname; | |
101 | int major, minor; | |
11a3e71d | 102 | int oldmajor, oldminor; |
64c4757e NB |
103 | long long events; |
104 | time_t utime; | |
105 | int uptodate; | |
d013a55e | 106 | int state; |
52826846 | 107 | int raid_disk; |
5787fa49 | 108 | } *devices; |
56eedc1a NB |
109 | int *best = NULL; /* indexed by raid_disk */ |
110 | int bestcnt = 0; | |
52826846 | 111 | int devcnt = 0, okcnt, sparecnt; |
aa88f531 | 112 | int req_cnt; |
64c4757e NB |
113 | int i; |
114 | int most_recent = 0; | |
cd29a5c8 | 115 | int chosen_drive; |
52826846 | 116 | int change = 0; |
cd29a5c8 NB |
117 | int inargv = 0; |
118 | int start_partial_ok = force || devlist==NULL; | |
5787fa49 NB |
119 | int num_devs; |
120 | mddev_dev_t tmpdev; | |
64c4757e | 121 | |
64c4757e NB |
122 | vers = md_get_version(mdfd); |
123 | if (vers <= 0) { | |
e0d19036 | 124 | fprintf(stderr, Name ": %s appears not to be an md device.\n", mddev); |
64c4757e NB |
125 | return 1; |
126 | } | |
682c7051 NB |
127 | if (vers < 9000) { |
128 | fprintf(stderr, Name ": Assemble requires driver version 0.90.0 or later.\n" | |
52826846 | 129 | " Upgrade your kernel or try --build\n"); |
64c4757e NB |
130 | return 1; |
131 | } | |
682c7051 | 132 | if (get_linux_version() < 2004000) |
64c4757e NB |
133 | old_linux = 1; |
134 | ||
135 | if (ioctl(mdfd, GET_ARRAY_INFO, &array)>=0) { | |
682c7051 | 136 | fprintf(stderr, Name ": device %s already active - cannot assemble it\n", |
64c4757e NB |
137 | mddev); |
138 | return 1; | |
139 | } | |
140 | ioctl(mdfd, STOP_ARRAY, NULL); /* just incase it was started but has no content */ | |
141 | ||
142 | /* | |
52826846 NB |
143 | * If any subdevs are listed, then any that don't |
144 | * match ident are discarded. Remainder must all match and | |
145 | * become the array. | |
146 | * If no subdevs, then we scan all devices in the config file, but | |
147 | * there must be something in the identity | |
64c4757e | 148 | */ |
64c4757e | 149 | |
cd29a5c8 | 150 | if (!devlist && |
52826846 NB |
151 | ident->uuid_set == 0 && |
152 | ident->super_minor < 0 && | |
153 | ident->devices == NULL) { | |
154 | fprintf(stderr, Name ": No identity information available for %s - cannot assemble.\n", | |
155 | mddev); | |
156 | return 1; | |
64c4757e | 157 | } |
cd29a5c8 | 158 | if (devlist == NULL) |
64c4757e | 159 | devlist = conf_get_devs(conffile); |
cd29a5c8 | 160 | else inargv = 1; |
64c4757e | 161 | |
5787fa49 NB |
162 | tmpdev = devlist; num_devs = 0; |
163 | while (tmpdev) { | |
164 | num_devs++; | |
165 | tmpdev = tmpdev->next; | |
166 | } | |
167 | best = malloc(num_devs * sizeof(*best)); | |
168 | devices = malloc(num_devs * sizeof(*devices)); | |
169 | ||
64c4757e | 170 | first_super.md_magic = 0; |
5787fa49 | 171 | for (i=0; i<num_devs; i++) |
64c4757e NB |
172 | best[i] = -1; |
173 | ||
82b27616 NB |
174 | if (verbose) |
175 | fprintf(stderr, Name ": looking for devices for %s\n", | |
176 | mddev); | |
177 | ||
cd29a5c8 | 178 | while ( devlist) { |
64c4757e NB |
179 | char *devname; |
180 | int this_uuid[4]; | |
181 | int dfd; | |
182 | struct stat stb; | |
52826846 NB |
183 | int havesuper=0; |
184 | ||
cd29a5c8 NB |
185 | devname = devlist->devname; |
186 | devlist = devlist->next; | |
64c4757e | 187 | |
52826846 | 188 | if (ident->devices && |
56eedc1a NB |
189 | !match_oneof(ident->devices, devname)) { |
190 | if (inargv || verbose) | |
191 | fprintf(stderr, Name ": %s is not one of %s\n", devname, ident->devices); | |
52826846 | 192 | continue; |
56eedc1a | 193 | } |
52826846 | 194 | |
64c4757e NB |
195 | dfd = open(devname, O_RDONLY, 0); |
196 | if (dfd < 0) { | |
197 | if (inargv || verbose) | |
682c7051 | 198 | fprintf(stderr, Name ": cannot open device %s: %s\n", |
64c4757e | 199 | devname, strerror(errno)); |
52826846 NB |
200 | } else if (fstat(dfd, &stb)< 0) { |
201 | /* Impossible! */ | |
202 | fprintf(stderr, Name ": fstat failed for %s: %s\n", | |
203 | devname, strerror(errno)); | |
204 | close(dfd); | |
cd29a5c8 NB |
205 | } else if ((stb.st_mode & S_IFMT) != S_IFBLK) { |
206 | fprintf(stderr, Name ": %s is not a block device.\n", | |
52826846 NB |
207 | devname); |
208 | close(dfd); | |
cd29a5c8 | 209 | } else if (load_super(dfd, &super)) { |
64c4757e | 210 | if (inargv || verbose) |
682c7051 | 211 | fprintf( stderr, Name ": no RAID superblock on %s\n", |
64c4757e NB |
212 | devname); |
213 | close(dfd); | |
52826846 NB |
214 | } else { |
215 | havesuper =1; | |
216 | uuid_from_super(this_uuid, &super); | |
217 | close(dfd); | |
64c4757e | 218 | } |
52826846 NB |
219 | |
220 | if (ident->uuid_set && | |
221 | (!havesuper || same_uuid(this_uuid, ident->uuid)==0)) { | |
222 | if (inargv || verbose) | |
223 | fprintf(stderr, Name ": %s has wrong uuid.\n", | |
224 | devname); | |
225 | continue; | |
82b27616 | 226 | } |
52826846 NB |
227 | if (ident->super_minor >= 0 && |
228 | (!havesuper || ident->super_minor != super.md_minor)) { | |
64c4757e | 229 | if (inargv || verbose) |
52826846 | 230 | fprintf(stderr, Name ": %s has wrong super-minor.\n", |
64c4757e NB |
231 | devname); |
232 | continue; | |
233 | } | |
cd29a5c8 NB |
234 | if (ident->level != -10 && |
235 | (!havesuper|| ident->level != super.level)) { | |
236 | if (inargv || verbose) | |
237 | fprintf(stderr, Name ": %s has wrong raid level.\n", | |
238 | devname); | |
239 | continue; | |
240 | } | |
241 | if (ident->raid_disks != -1 && | |
242 | (!havesuper || ident->raid_disks!= super.raid_disks)) { | |
243 | if (inargv || verbose) | |
244 | fprintf(stderr, Name ": %s requires wrong number of drives.\n", | |
245 | devname); | |
246 | continue; | |
247 | } | |
52826846 NB |
248 | |
249 | /* If we are this far, then we are commited to this device. | |
250 | * If the super_block doesn't exist, or doesn't match others, | |
251 | * then we cannot continue | |
252 | */ | |
52826846 NB |
253 | |
254 | if (!havesuper) { | |
255 | fprintf(stderr, Name ": %s has no superblock - assembly aborted\n", | |
256 | devname); | |
257 | return 1; | |
258 | } | |
259 | if (compare_super(&first_super, &super)) { | |
260 | fprintf(stderr, Name ": superblock on %s doesn't match others - assembly aborted\n", | |
261 | devname); | |
262 | return 1; | |
64c4757e NB |
263 | } |
264 | ||
5787fa49 NB |
265 | |
266 | /* this is needed until we get a more relaxed super block format */ | |
64c4757e | 267 | if (devcnt >= MD_SB_DISKS) { |
682c7051 | 268 | fprintf(stderr, Name ": ouch - too many devices appear to be in this array. Ignoring %s\n", |
64c4757e NB |
269 | devname); |
270 | continue; | |
271 | } | |
5787fa49 NB |
272 | |
273 | /* looks like a good enough match to update the super block if needed */ | |
274 | if (update) { | |
275 | if (strcmp(update, "sparc2.2")==0 ) { | |
276 | /* 2.2 sparc put the events in the wrong place | |
277 | * So we copy the tail of the superblock | |
278 | * up 4 bytes before continuing | |
279 | */ | |
280 | __u32 *sb32 = (__u32*)&super; | |
281 | memcpy(sb32+MD_SB_GENERIC_CONSTANT_WORDS+7, | |
282 | sb32+MD_SB_GENERIC_CONSTANT_WORDS+7+1, | |
283 | (MD_SB_WORDS - (MD_SB_GENERIC_CONSTANT_WORDS+7+1))*4); | |
284 | fprintf (stderr, Name ": adjusting superblock of %s for 2.2/sparc compatability.\n", | |
285 | devname); | |
286 | } | |
287 | if (strcmp(update, "super-minor") ==0) { | |
288 | struct stat stb2; | |
289 | fstat(mdfd, &stb2); | |
290 | super.md_minor = MINOR(stb2.st_rdev); | |
291 | if (verbose) | |
292 | fprintf(stderr, Name ": updating superblock of %s with minor number %d\n", | |
293 | devname, super.md_minor); | |
294 | } | |
295 | super.sb_csum = calc_sb_csum(&super); | |
296 | dfd = open(devname, O_RDWR, 0); | |
297 | if (dfd < 0) | |
298 | fprintf(stderr, Name ": Cannot open %s for superblock update\n", | |
299 | devname); | |
300 | else if (store_super(dfd, &super)) | |
301 | fprintf(stderr, Name ": Could not re-write superblock on %s.\n", | |
302 | devname); | |
303 | if (dfd >= 0) | |
304 | close(dfd); | |
305 | } | |
306 | ||
cd29a5c8 NB |
307 | if (verbose) |
308 | fprintf(stderr, Name ": %s is identified as a member of %s, slot %d.\n", | |
309 | devname, mddev, super.this_disk.raid_disk); | |
64c4757e NB |
310 | devices[devcnt].devname = devname; |
311 | devices[devcnt].major = MAJOR(stb.st_rdev); | |
312 | devices[devcnt].minor = MINOR(stb.st_rdev); | |
11a3e71d NB |
313 | devices[devcnt].oldmajor = super.this_disk.major; |
314 | devices[devcnt].oldminor = super.this_disk.minor; | |
64c4757e NB |
315 | devices[devcnt].events = md_event(&super); |
316 | devices[devcnt].utime = super.utime; | |
52826846 | 317 | devices[devcnt].raid_disk = super.this_disk.raid_disk; |
64c4757e | 318 | devices[devcnt].uptodate = 0; |
d013a55e | 319 | devices[devcnt].state = super.this_disk.state; |
64c4757e NB |
320 | if (most_recent < devcnt) { |
321 | if (devices[devcnt].events | |
322 | > devices[most_recent].events) | |
323 | most_recent = devcnt; | |
324 | } | |
5787fa49 NB |
325 | if (super.level == -4) |
326 | /* with multipath, the raid_disk from the superblock is meaningless */ | |
327 | i = devcnt; | |
328 | else | |
329 | i = devices[devcnt].raid_disk; | |
56eedc1a NB |
330 | if (i>=0 && i < 10000) { |
331 | if (i >= bestcnt) { | |
332 | int newbestcnt = i+10; | |
333 | int *newbest = malloc(sizeof(int)*newbestcnt); | |
334 | int c; | |
335 | for (c=0; c < newbestcnt; c++) | |
336 | if (c < bestcnt) | |
337 | newbest[c] = best[c]; | |
338 | else | |
339 | newbest[c] = -1; | |
340 | if (best)free(best); | |
341 | best = newbest; | |
342 | bestcnt = newbestcnt; | |
343 | } | |
52826846 NB |
344 | if (best[i] == -1 |
345 | || devices[best[i]].events < devices[devcnt].events) | |
346 | best[i] = devcnt; | |
56eedc1a | 347 | } |
64c4757e NB |
348 | devcnt++; |
349 | } | |
350 | ||
351 | if (devcnt == 0) { | |
682c7051 | 352 | fprintf(stderr, Name ": no devices found for %s\n", |
64c4757e NB |
353 | mddev); |
354 | return 1; | |
355 | } | |
356 | /* now we have some devices that might be suitable. | |
357 | * I wonder how many | |
358 | */ | |
359 | okcnt = 0; | |
52826846 | 360 | sparecnt=0; |
56eedc1a | 361 | for (i=0; i< bestcnt ;i++) { |
64c4757e | 362 | int j = best[i]; |
cd29a5c8 | 363 | int event_margin = !force; |
64c4757e | 364 | if (j < 0) continue; |
d013a55e NB |
365 | /* note: we ignore error flags in multipath arrays |
366 | * as they don't make sense | |
367 | */ | |
368 | if (first_super.level != -4) | |
aa88f531 NB |
369 | if (!(devices[j].state & (1<<MD_DISK_SYNC))) { |
370 | if (!(devices[j].state & (1<<MD_DISK_FAULTY))) | |
371 | sparecnt++; | |
d013a55e | 372 | continue; |
aa88f531 | 373 | } |
cd29a5c8 | 374 | if (devices[j].events+event_margin >= |
64c4757e NB |
375 | devices[most_recent].events) { |
376 | devices[j].uptodate = 1; | |
52826846 NB |
377 | if (i < first_super.raid_disks) |
378 | okcnt++; | |
379 | else | |
380 | sparecnt++; | |
64c4757e NB |
381 | } |
382 | } | |
383 | while (force && !enough(first_super.level, first_super.raid_disks, okcnt)) { | |
384 | /* Choose the newest best drive which is | |
385 | * not up-to-date, update the superblock | |
386 | * and add it. | |
387 | */ | |
52826846 | 388 | int fd; |
cd29a5c8 | 389 | chosen_drive = -1; |
56eedc1a | 390 | for (i=0; i<first_super.raid_disks && i < bestcnt; i++) { |
52826846 NB |
391 | int j = best[i]; |
392 | if (j>=0 && | |
393 | !devices[j].uptodate && | |
394 | devices[j].events > 0 && | |
395 | (chosen_drive < 0 || | |
396 | devices[j].events > devices[chosen_drive].events)) | |
397 | chosen_drive = j; | |
398 | } | |
399 | if (chosen_drive < 0) | |
400 | break; | |
401 | fprintf(stderr, Name ": forcing event count in %s(%d) from %d upto %d\n", | |
402 | devices[chosen_drive].devname, devices[chosen_drive].raid_disk, | |
403 | (int)(devices[chosen_drive].events), | |
404 | (int)(devices[most_recent].events)); | |
405 | fd = open(devices[chosen_drive].devname, O_RDWR); | |
406 | if (fd < 0) { | |
407 | fprintf(stderr, Name ": Couldn't open %s for write - not updating\n", | |
408 | devices[chosen_drive].devname); | |
409 | devices[chosen_drive].events = 0; | |
410 | continue; | |
411 | } | |
412 | if (load_super(fd, &super)) { | |
413 | close(fd); | |
414 | fprintf(stderr, Name ": RAID superblock disappeared from %s - not updating.\n", | |
415 | devices[chosen_drive].devname); | |
416 | devices[chosen_drive].events = 0; | |
417 | continue; | |
418 | } | |
419 | super.events_hi = (devices[most_recent].events>>32)&0xFFFFFFFF; | |
420 | super.events_lo = (devices[most_recent].events)&0xFFFFFFFF; | |
5787fa49 NB |
421 | if (super.level == 5 || super.level == 4) { |
422 | /* need to force clean */ | |
d013a55e | 423 | super.state = (1<<MD_SB_CLEAN); |
5787fa49 | 424 | } |
52826846 NB |
425 | super.sb_csum = calc_sb_csum(&super); |
426 | /*DRYRUN*/ if (store_super(fd, &super)) { | |
427 | close(fd); | |
428 | fprintf(stderr, Name ": Could not re-write superblock on %s\n", | |
429 | devices[chosen_drive].devname); | |
430 | devices[chosen_drive].events = 0; | |
431 | continue; | |
432 | } | |
433 | close(fd); | |
434 | devices[chosen_drive].events = devices[most_recent].events; | |
435 | devices[chosen_drive].uptodate = 1; | |
436 | okcnt++; | |
64c4757e | 437 | } |
52826846 NB |
438 | |
439 | /* Now we want to look at the superblock which the kernel will base things on | |
440 | * and compare the devices that we think are working with the devices that the | |
441 | * superblock thinks are working. | |
442 | * If there are differences and --force is given, then update this chosen | |
443 | * superblock. | |
444 | */ | |
cd29a5c8 | 445 | chosen_drive = -1; |
56eedc1a | 446 | for (i=0; chosen_drive < 0 && i<bestcnt; i++) { |
52826846 NB |
447 | int j = best[i]; |
448 | int fd; | |
449 | if (j<0) | |
450 | continue; | |
451 | if (!devices[j].uptodate) | |
452 | continue; | |
453 | chosen_drive = j; | |
454 | if ((fd=open(devices[j].devname, O_RDONLY))< 0) { | |
455 | fprintf(stderr, Name ": Cannot open %s: %s\n", | |
456 | devices[j].devname, strerror(errno)); | |
457 | return 1; | |
458 | } | |
459 | if (load_super(fd, &super)) { | |
460 | close(fd); | |
461 | fprintf(stderr, Name ": RAID superblock has disappeared from %s\n", | |
462 | devices[j].devname); | |
463 | return 1; | |
464 | } | |
465 | close(fd); | |
466 | } | |
467 | ||
56eedc1a | 468 | for (i=0; i<bestcnt; i++) { |
52826846 | 469 | int j = best[i]; |
11a3e71d NB |
470 | int desired_state; |
471 | ||
472 | if (i < super.raid_disks) | |
473 | desired_state = (1<<MD_DISK_ACTIVE) | (1<<MD_DISK_SYNC); | |
474 | else | |
475 | desired_state = 0; | |
476 | ||
52826846 NB |
477 | if (j<0) |
478 | continue; | |
479 | if (!devices[j].uptodate) | |
480 | continue; | |
11a3e71d NB |
481 | #if 0 |
482 | This doesnt work yet | |
483 | if (devices[j].major != super.disks[i].major || | |
484 | devices[j].minor != super.disks[i].minor) { | |
52826846 | 485 | change |= 1; |
11a3e71d NB |
486 | super.disks[i].major = devices[j].major; |
487 | super.disks[i].minor = devices[j].minor; | |
488 | } | |
489 | #endif | |
490 | if (devices[j].oldmajor != super.disks[i].major || | |
491 | devices[j].oldminor != super.disks[i].minor) { | |
492 | change |= 2; | |
e0d19036 NB |
493 | super.disks[i].major = devices[j].oldmajor; |
494 | super.disks[i].minor = devices[j].oldminor; | |
52826846 NB |
495 | } |
496 | if (devices[j].uptodate && | |
11a3e71d | 497 | (super.disks[i].state != desired_state)) { |
52826846 NB |
498 | if (force) { |
499 | fprintf(stderr, Name ": " | |
cd29a5c8 | 500 | "clearing FAULTY flag for device %d in %s for %s\n", |
52826846 | 501 | j, mddev, devices[j].devname); |
11a3e71d | 502 | super.disks[i].state = desired_state; |
52826846 NB |
503 | change |= 2; |
504 | } else { | |
505 | fprintf(stderr, Name ": " | |
11a3e71d | 506 | "device %d in %s has wrong state in superblock, but %s seems ok\n", |
52826846 NB |
507 | i, mddev, devices[j].devname); |
508 | } | |
509 | } | |
510 | if (!devices[j].uptodate && | |
511 | !(super.disks[i].state & (1 << MD_DISK_FAULTY))) { | |
512 | fprintf(stderr, Name ": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n", | |
513 | i, mddev); | |
514 | } | |
515 | } | |
d013a55e NB |
516 | if (force && (super.level == 4 || super.level == 5) && |
517 | okcnt == super.raid_disks-1) { | |
518 | super.state = (1<< MD_SB_CLEAN); | |
519 | change |= 2; | |
520 | } | |
52826846 NB |
521 | |
522 | if ((force && (change & 2)) | |
523 | || (old_linux && (change & 1))) { | |
524 | int fd; | |
525 | super.sb_csum = calc_sb_csum(&super); | |
526 | fd = open(devices[chosen_drive].devname, O_RDWR); | |
527 | if (fd < 0) { | |
528 | fprintf(stderr, Name ": Could open %s for write - cannot Assemble array.\n", | |
529 | devices[chosen_drive].devname); | |
530 | return 1; | |
531 | } | |
532 | if (store_super(fd, &super)) { | |
533 | close(fd); | |
534 | fprintf(stderr, Name ": Could not re-write superblock on %s\n", | |
535 | devices[chosen_drive].devname); | |
536 | return 1; | |
537 | } | |
538 | close(fd); | |
539 | change = 0; | |
540 | } | |
541 | ||
aa88f531 NB |
542 | /* count number of in-sync devices according to the superblock. |
543 | * We must have this number to start the array without -s or -R | |
544 | */ | |
545 | req_cnt = 0; | |
546 | for (i=0; i<MD_SB_DISKS; i++) | |
547 | if ((first_super.disks[i].state & (1<<MD_DISK_SYNC)) && | |
548 | (first_super.disks[i].state & (1<<MD_DISK_ACTIVE)) && | |
549 | !(first_super.disks[i].state & (1<<MD_DISK_FAULTY))) | |
550 | req_cnt ++; | |
551 | ||
552 | ||
64c4757e NB |
553 | /* Almost ready to actually *do* something */ |
554 | if (!old_linux) { | |
555 | if (ioctl(mdfd, SET_ARRAY_INFO, NULL) != 0) { | |
682c7051 | 556 | fprintf(stderr, Name ": SET_ARRAY_INFO failed for %s: %s\n", |
64c4757e NB |
557 | mddev, strerror(errno)); |
558 | return 1; | |
559 | } | |
52826846 | 560 | /* First, add the raid disks, but add the chosen one last */ |
56eedc1a | 561 | for (i=0; i<= bestcnt; i++) { |
52826846 | 562 | int j; |
56eedc1a | 563 | if (i < bestcnt) { |
52826846 NB |
564 | j = best[i]; |
565 | if (j == chosen_drive) | |
566 | continue; | |
567 | } else | |
568 | j = chosen_drive; | |
569 | ||
56eedc1a | 570 | if (j >= 0 /* && devices[j].uptodate */) { |
64c4757e NB |
571 | mdu_disk_info_t disk; |
572 | memset(&disk, 0, sizeof(disk)); | |
573 | disk.major = devices[j].major; | |
574 | disk.minor = devices[j].minor; | |
575 | if (ioctl(mdfd, ADD_NEW_DISK, &disk)!=0) { | |
682c7051 | 576 | fprintf(stderr, Name ": failed to add %s to %s: %s\n", |
64c4757e NB |
577 | devices[j].devname, |
578 | mddev, | |
579 | strerror(errno)); | |
52826846 NB |
580 | if (i < first_super.raid_disks) |
581 | okcnt--; | |
582 | else | |
583 | sparecnt--; | |
584 | } else if (verbose) | |
585 | fprintf(stderr, Name ": added %s to %s as %d\n", | |
586 | devices[j].devname, mddev, devices[j].raid_disk); | |
587 | } else if (verbose && i < first_super.raid_disks) | |
682c7051 | 588 | fprintf(stderr, Name ": no uptodate device for slot %d of %s\n", |
64c4757e NB |
589 | i, mddev); |
590 | } | |
52826846 | 591 | |
64c4757e NB |
592 | if (runstop == 1 || |
593 | (runstop == 0 && | |
aa88f531 NB |
594 | ( enough(first_super.level, first_super.raid_disks, okcnt) && |
595 | (okcnt >= req_cnt || start_partial_ok) | |
596 | ))) { | |
82b27616 | 597 | if (ioctl(mdfd, RUN_ARRAY, NULL)==0) { |
52826846 NB |
598 | fprintf(stderr, Name ": %s has been started with %d drive%s", |
599 | mddev, okcnt, okcnt==1?"":"s"); | |
aa88f531 NB |
600 | if (okcnt < first_super.raid_disks) |
601 | fprintf(stderr, " (out of %d)", first_super.raid_disks); | |
52826846 NB |
602 | if (sparecnt) |
603 | fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s"); | |
604 | fprintf(stderr, ".\n"); | |
64c4757e | 605 | return 0; |
82b27616 | 606 | } |
682c7051 | 607 | fprintf(stderr, Name ": failed to RUN_ARRAY %s: %s\n", |
64c4757e NB |
608 | mddev, strerror(errno)); |
609 | return 1; | |
610 | } | |
82b27616 | 611 | if (runstop == -1) { |
52826846 NB |
612 | fprintf(stderr, Name ": %s assembled from %d drive%s, but not started.\n", |
613 | mddev, okcnt, okcnt==1?"":"s"); | |
64c4757e | 614 | return 0; |
82b27616 | 615 | } |
aa88f531 NB |
616 | fprintf(stderr, Name ": %s assembled from %d drive%s", mddev, okcnt, okcnt==1?"":"s"); |
617 | if (sparecnt) | |
618 | fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s"); | |
619 | if (!enough(first_super.level, first_super.raid_disks, okcnt)) | |
620 | fprintf(stderr, " - not enough to start the array.\n"); | |
621 | else { | |
622 | if (req_cnt == first_super.raid_disks) | |
623 | fprintf(stderr, " - need all %d to start it", req_cnt); | |
624 | else | |
625 | fprintf(stderr, " - need %d of %d to start", req_cnt, first_super.raid_disks); | |
626 | fprintf(stderr, " (use --run to insist).\n"); | |
627 | } | |
64c4757e | 628 | return 1; |
82b27616 | 629 | } else { |
52826846 NB |
630 | /* The "chosen_drive" is a good choice, and if necessary, the superblock has |
631 | * been updated to point to the current locations of devices. | |
632 | * so we can just start the array | |
82b27616 | 633 | */ |
cd29a5c8 | 634 | unsigned long dev; |
82b27616 NB |
635 | dev = MKDEV(devices[chosen_drive].major, |
636 | devices[chosen_drive].minor); | |
637 | if (ioctl(mdfd, START_ARRAY, dev)) { | |
638 | fprintf(stderr, Name ": Cannot start array: %s\n", | |
639 | strerror(errno)); | |
640 | } | |
641 | ||
64c4757e | 642 | } |
e0d19036 | 643 | return 0; |
64c4757e | 644 | } |