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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 | |
82d9eba6 | 32 | int Assemble(struct supertype *st, 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; |
6a41304b | 104 | int disk_nr; |
5787fa49 | 105 | } *devices; |
56eedc1a | 106 | int *best = NULL; /* indexed by raid_disk */ |
98c6faba NB |
107 | unsigned int bestcnt = 0; |
108 | int devcnt = 0; | |
109 | unsigned int okcnt, sparecnt; | |
110 | unsigned int req_cnt; | |
111 | unsigned int i; | |
64c4757e | 112 | int most_recent = 0; |
cd29a5c8 | 113 | int chosen_drive; |
52826846 | 114 | int change = 0; |
cd29a5c8 NB |
115 | int inargv = 0; |
116 | int start_partial_ok = force || devlist==NULL; | |
98c6faba | 117 | unsigned int num_devs; |
5787fa49 | 118 | mddev_dev_t tmpdev; |
4b1ac34b | 119 | struct mdinfo info; |
947fd4dd | 120 | struct mddev_ident_s ident2; |
265e0f17 | 121 | char *avail; |
308e1801 | 122 | int nextspare = 0; |
64c4757e | 123 | |
64c4757e NB |
124 | vers = md_get_version(mdfd); |
125 | if (vers <= 0) { | |
e0d19036 | 126 | fprintf(stderr, Name ": %s appears not to be an md device.\n", mddev); |
64c4757e NB |
127 | return 1; |
128 | } | |
682c7051 NB |
129 | if (vers < 9000) { |
130 | fprintf(stderr, Name ": Assemble requires driver version 0.90.0 or later.\n" | |
52826846 | 131 | " Upgrade your kernel or try --build\n"); |
64c4757e NB |
132 | return 1; |
133 | } | |
682c7051 | 134 | if (get_linux_version() < 2004000) |
64c4757e NB |
135 | old_linux = 1; |
136 | ||
4b1ac34b | 137 | if (ioctl(mdfd, GET_ARRAY_INFO, &info.array)>=0) { |
682c7051 | 138 | fprintf(stderr, Name ": device %s already active - cannot assemble it\n", |
64c4757e NB |
139 | mddev); |
140 | return 1; | |
141 | } | |
142 | ioctl(mdfd, STOP_ARRAY, NULL); /* just incase it was started but has no content */ | |
143 | ||
144 | /* | |
52826846 NB |
145 | * If any subdevs are listed, then any that don't |
146 | * match ident are discarded. Remainder must all match and | |
147 | * become the array. | |
148 | * If no subdevs, then we scan all devices in the config file, but | |
149 | * there must be something in the identity | |
64c4757e | 150 | */ |
64c4757e | 151 | |
cd29a5c8 | 152 | if (!devlist && |
52826846 NB |
153 | ident->uuid_set == 0 && |
154 | ident->super_minor < 0 && | |
155 | ident->devices == NULL) { | |
156 | fprintf(stderr, Name ": No identity information available for %s - cannot assemble.\n", | |
157 | mddev); | |
158 | return 1; | |
64c4757e | 159 | } |
cd29a5c8 | 160 | if (devlist == NULL) |
64c4757e | 161 | devlist = conf_get_devs(conffile); |
cd29a5c8 | 162 | else inargv = 1; |
64c4757e | 163 | |
5787fa49 NB |
164 | tmpdev = devlist; num_devs = 0; |
165 | while (tmpdev) { | |
166 | num_devs++; | |
167 | tmpdev = tmpdev->next; | |
168 | } | |
5787fa49 NB |
169 | devices = malloc(num_devs * sizeof(*devices)); |
170 | ||
82d9eba6 | 171 | if (!st && ident->st) st = ident->st; |
64c4757e | 172 | |
dab6685f | 173 | if (verbose>0) |
82b27616 NB |
174 | fprintf(stderr, Name ": looking for devices for %s\n", |
175 | mddev); | |
176 | ||
cd29a5c8 | 177 | while ( devlist) { |
64c4757e | 178 | char *devname; |
64c4757e NB |
179 | int dfd; |
180 | struct stat stb; | |
82d9eba6 | 181 | struct supertype *tst = st; |
52826846 | 182 | |
cd29a5c8 NB |
183 | devname = devlist->devname; |
184 | devlist = devlist->next; | |
64c4757e | 185 | |
52826846 | 186 | if (ident->devices && |
56eedc1a | 187 | !match_oneof(ident->devices, devname)) { |
6a41304b | 188 | if ((inargv && verbose>=0) || verbose > 0) |
56eedc1a | 189 | fprintf(stderr, Name ": %s is not one of %s\n", devname, ident->devices); |
52826846 | 190 | continue; |
56eedc1a | 191 | } |
4b1ac34b NB |
192 | |
193 | if (super) { | |
194 | free(super); | |
195 | super = NULL; | |
196 | } | |
52826846 | 197 | |
8b0dabea | 198 | dfd = dev_open(devname, O_RDONLY|O_EXCL); |
64c4757e | 199 | if (dfd < 0) { |
6a41304b | 200 | if ((inargv && verbose >= 0) || verbose > 0) |
682c7051 | 201 | fprintf(stderr, Name ": cannot open device %s: %s\n", |
64c4757e | 202 | devname, strerror(errno)); |
52826846 NB |
203 | } else if (fstat(dfd, &stb)< 0) { |
204 | /* Impossible! */ | |
205 | fprintf(stderr, Name ": fstat failed for %s: %s\n", | |
206 | devname, strerror(errno)); | |
cd29a5c8 NB |
207 | } else if ((stb.st_mode & S_IFMT) != S_IFBLK) { |
208 | fprintf(stderr, Name ": %s is not a block device.\n", | |
52826846 | 209 | devname); |
82d9eba6 | 210 | } else if (!tst && (tst = guess_super(dfd)) == NULL) { |
6a41304b | 211 | if ((inargv && verbose >= 0) || verbose > 0) |
f9ce90ba | 212 | fprintf(stderr, Name ": no recogniseable superblock\n"); |
82d9eba6 | 213 | } else if (tst->ss->load_super(tst,dfd, &super, NULL)) { |
6a41304b | 214 | if ((inargv && verbose >= 0) || verbose > 0) |
682c7051 | 215 | fprintf( stderr, Name ": no RAID superblock on %s\n", |
64c4757e | 216 | devname); |
52826846 | 217 | } else { |
947fd4dd | 218 | tst->ss->getinfo_super(&info, &ident2, super); |
64c4757e | 219 | } |
c06487ce | 220 | if (dfd >= 0) close(dfd); |
52826846 | 221 | |
7d99579f | 222 | if (ident->uuid_set && (!update && strcmp(update, "uuid")!= 0) && |
f277ce36 | 223 | (!super || same_uuid(info.uuid, ident->uuid, tst->ss->swapuuid)==0)) { |
6a41304b | 224 | if ((inargv && verbose >= 0) || verbose > 0) |
52826846 NB |
225 | fprintf(stderr, Name ": %s has wrong uuid.\n", |
226 | devname); | |
227 | continue; | |
82b27616 | 228 | } |
947fd4dd NB |
229 | if (ident->name[0] && |
230 | (!super || strncmp(ident2.name, ident->name, 32)!=0)) { | |
6a41304b | 231 | if ((inargv && verbose >= 0) || verbose > 0) |
947fd4dd NB |
232 | fprintf(stderr, Name ": %s has wrong name.\n", |
233 | devname); | |
234 | continue; | |
235 | } | |
98c6faba | 236 | if (ident->super_minor != UnSet && |
4b1ac34b | 237 | (!super || ident->super_minor != info.array.md_minor)) { |
6a41304b | 238 | if ((inargv && verbose >= 0) || verbose > 0) |
52826846 | 239 | fprintf(stderr, Name ": %s has wrong super-minor.\n", |
64c4757e NB |
240 | devname); |
241 | continue; | |
242 | } | |
98c6faba | 243 | if (ident->level != UnSet && |
4b1ac34b | 244 | (!super|| ident->level != info.array.level)) { |
6a41304b | 245 | if ((inargv && verbose >= 0) || verbose > 0) |
cd29a5c8 NB |
246 | fprintf(stderr, Name ": %s has wrong raid level.\n", |
247 | devname); | |
248 | continue; | |
249 | } | |
98c6faba | 250 | if (ident->raid_disks != UnSet && |
4b1ac34b | 251 | (!super || ident->raid_disks!= info.array.raid_disks)) { |
6a41304b | 252 | if ((inargv && verbose >= 0) || verbose > 0) |
cd29a5c8 NB |
253 | fprintf(stderr, Name ": %s requires wrong number of drives.\n", |
254 | devname); | |
255 | continue; | |
256 | } | |
52826846 NB |
257 | |
258 | /* If we are this far, then we are commited to this device. | |
259 | * If the super_block doesn't exist, or doesn't match others, | |
260 | * then we cannot continue | |
261 | */ | |
52826846 | 262 | |
4b1ac34b | 263 | if (!super) { |
52826846 NB |
264 | fprintf(stderr, Name ": %s has no superblock - assembly aborted\n", |
265 | devname); | |
4b1ac34b | 266 | free(first_super); |
52826846 NB |
267 | return 1; |
268 | } | |
82d9eba6 NB |
269 | st = tst; /* commit to this format, if haven't already */ |
270 | if (st->ss->compare_super(&first_super, super)) { | |
52826846 NB |
271 | fprintf(stderr, Name ": superblock on %s doesn't match others - assembly aborted\n", |
272 | devname); | |
4b1ac34b NB |
273 | free(super); |
274 | free(first_super); | |
52826846 | 275 | return 1; |
64c4757e NB |
276 | } |
277 | ||
5787fa49 NB |
278 | /* looks like a good enough match to update the super block if needed */ |
279 | if (update) { | |
4b1ac34b NB |
280 | /* prepare useful information in info structures */ |
281 | struct stat stb2; | |
282 | fstat(mdfd, &stb2); | |
283 | info.array.md_minor = minor(stb2.st_rdev); | |
7d99579f NB |
284 | |
285 | if (strcmp(update, "uuid")==0 && | |
286 | !ident->uuid_set) { | |
287 | int rfd; | |
288 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || | |
289 | read(rfd, ident->uuid, 16) != 16) { | |
290 | *(__u32*)(ident->uuid) = random(); | |
291 | *(__u32*)(ident->uuid+1) = random(); | |
292 | *(__u32*)(ident->uuid+2) = random(); | |
293 | *(__u32*)(ident->uuid+3) = random(); | |
294 | } | |
295 | if (rfd >= 0) close(rfd); | |
296 | ident->uuid_set = 1; | |
297 | } | |
298 | memcpy(info.uuid, ident->uuid, 16); | |
82d9eba6 | 299 | st->ss->update_super(&info, super, update, devname, verbose); |
4b1ac34b | 300 | |
8b0dabea | 301 | dfd = dev_open(devname, O_RDWR|O_EXCL); |
5787fa49 NB |
302 | if (dfd < 0) |
303 | fprintf(stderr, Name ": Cannot open %s for superblock update\n", | |
304 | devname); | |
96395475 | 305 | else if (st->ss->store_super(st, dfd, super)) |
5787fa49 NB |
306 | fprintf(stderr, Name ": Could not re-write superblock on %s.\n", |
307 | devname); | |
308 | if (dfd >= 0) | |
309 | close(dfd); | |
310 | } | |
311 | ||
dab6685f | 312 | if (verbose > 0) |
cd29a5c8 | 313 | fprintf(stderr, Name ": %s is identified as a member of %s, slot %d.\n", |
4b1ac34b | 314 | devname, mddev, info.disk.raid_disk); |
64c4757e | 315 | devices[devcnt].devname = devname; |
0df46c2a NB |
316 | devices[devcnt].major = major(stb.st_rdev); |
317 | devices[devcnt].minor = minor(stb.st_rdev); | |
4b1ac34b NB |
318 | devices[devcnt].oldmajor = info.disk.major; |
319 | devices[devcnt].oldminor = info.disk.minor; | |
320 | devices[devcnt].events = info.events; | |
321 | devices[devcnt].raid_disk = info.disk.raid_disk; | |
6a41304b | 322 | devices[devcnt].disk_nr = info.disk.number; |
64c4757e | 323 | devices[devcnt].uptodate = 0; |
4b1ac34b | 324 | devices[devcnt].state = info.disk.state; |
64c4757e NB |
325 | if (most_recent < devcnt) { |
326 | if (devices[devcnt].events | |
327 | > devices[most_recent].events) | |
328 | most_recent = devcnt; | |
329 | } | |
4b1ac34b | 330 | if (info.array.level == -4) |
5787fa49 NB |
331 | /* with multipath, the raid_disk from the superblock is meaningless */ |
332 | i = devcnt; | |
333 | else | |
334 | i = devices[devcnt].raid_disk; | |
308e1801 NB |
335 | if (i+1 == 0) { |
336 | if (nextspare < info.array.raid_disks) | |
337 | nextspare = info.array.raid_disks; | |
338 | i = nextspare++; | |
339 | } | |
98c6faba | 340 | if (i < 10000) { |
56eedc1a | 341 | if (i >= bestcnt) { |
98c6faba | 342 | unsigned int newbestcnt = i+10; |
56eedc1a | 343 | int *newbest = malloc(sizeof(int)*newbestcnt); |
98c6faba | 344 | unsigned int c; |
56eedc1a NB |
345 | for (c=0; c < newbestcnt; c++) |
346 | if (c < bestcnt) | |
347 | newbest[c] = best[c]; | |
348 | else | |
349 | newbest[c] = -1; | |
350 | if (best)free(best); | |
351 | best = newbest; | |
352 | bestcnt = newbestcnt; | |
353 | } | |
52826846 NB |
354 | if (best[i] == -1 |
355 | || devices[best[i]].events < devices[devcnt].events) | |
356 | best[i] = devcnt; | |
56eedc1a | 357 | } |
64c4757e NB |
358 | devcnt++; |
359 | } | |
360 | ||
4b1ac34b NB |
361 | if (super) |
362 | free(super); | |
363 | super = NULL; | |
364 | ||
586ed405 NB |
365 | if (update && strcmp(update, "byteorder")==0) |
366 | st->minor_version = 90; | |
367 | ||
64c4757e | 368 | if (devcnt == 0) { |
682c7051 | 369 | fprintf(stderr, Name ": no devices found for %s\n", |
64c4757e | 370 | mddev); |
4b1ac34b | 371 | free(first_super); |
64c4757e NB |
372 | return 1; |
373 | } | |
4b1ac34b | 374 | |
947fd4dd | 375 | st->ss->getinfo_super(&info, &ident2, first_super); |
4b1ac34b | 376 | |
64c4757e NB |
377 | /* now we have some devices that might be suitable. |
378 | * I wonder how many | |
379 | */ | |
265e0f17 NB |
380 | avail = malloc(info.array.raid_disks); |
381 | memset(avail, 0, info.array.raid_disks); | |
64c4757e | 382 | okcnt = 0; |
52826846 | 383 | sparecnt=0; |
56eedc1a | 384 | for (i=0; i< bestcnt ;i++) { |
64c4757e | 385 | int j = best[i]; |
ee04451c NB |
386 | int event_margin = 1; /* always allow a difference of '1' |
387 | * like the kernel does | |
388 | */ | |
64c4757e | 389 | if (j < 0) continue; |
d013a55e NB |
390 | /* note: we ignore error flags in multipath arrays |
391 | * as they don't make sense | |
392 | */ | |
4b1ac34b | 393 | if (info.array.level != -4) |
aa88f531 NB |
394 | if (!(devices[j].state & (1<<MD_DISK_SYNC))) { |
395 | if (!(devices[j].state & (1<<MD_DISK_FAULTY))) | |
396 | sparecnt++; | |
d013a55e | 397 | continue; |
aa88f531 | 398 | } |
cd29a5c8 | 399 | if (devices[j].events+event_margin >= |
64c4757e NB |
400 | devices[most_recent].events) { |
401 | devices[j].uptodate = 1; | |
265e0f17 | 402 | if (i < info.array.raid_disks) { |
52826846 | 403 | okcnt++; |
265e0f17 NB |
404 | avail[i]=1; |
405 | } else | |
52826846 | 406 | sparecnt++; |
64c4757e NB |
407 | } |
408 | } | |
265e0f17 NB |
409 | while (force && !enough(info.array.level, info.array.raid_disks, |
410 | info.array.layout, | |
411 | avail, okcnt)) { | |
64c4757e NB |
412 | /* Choose the newest best drive which is |
413 | * not up-to-date, update the superblock | |
414 | * and add it. | |
415 | */ | |
52826846 | 416 | int fd; |
cd29a5c8 | 417 | chosen_drive = -1; |
4b1ac34b | 418 | for (i=0; i<info.array.raid_disks && i < bestcnt; i++) { |
52826846 NB |
419 | int j = best[i]; |
420 | if (j>=0 && | |
421 | !devices[j].uptodate && | |
422 | devices[j].events > 0 && | |
423 | (chosen_drive < 0 || | |
424 | devices[j].events > devices[chosen_drive].events)) | |
425 | chosen_drive = j; | |
426 | } | |
427 | if (chosen_drive < 0) | |
428 | break; | |
dab6685f NB |
429 | if (verbose >= 0) |
430 | fprintf(stderr, Name ": forcing event count in %s(%d) from %d upto %d\n", | |
431 | devices[chosen_drive].devname, devices[chosen_drive].raid_disk, | |
432 | (int)(devices[chosen_drive].events), | |
433 | (int)(devices[most_recent].events)); | |
8b0dabea | 434 | fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL); |
52826846 NB |
435 | if (fd < 0) { |
436 | fprintf(stderr, Name ": Couldn't open %s for write - not updating\n", | |
437 | devices[chosen_drive].devname); | |
438 | devices[chosen_drive].events = 0; | |
439 | continue; | |
440 | } | |
82d9eba6 | 441 | if (st->ss->load_super(st,fd, &super, NULL)) { |
52826846 NB |
442 | close(fd); |
443 | fprintf(stderr, Name ": RAID superblock disappeared from %s - not updating.\n", | |
444 | devices[chosen_drive].devname); | |
445 | devices[chosen_drive].events = 0; | |
446 | continue; | |
447 | } | |
4b1ac34b | 448 | info.events = devices[most_recent].events; |
82d9eba6 | 449 | st->ss->update_super(&info, super, "force", devices[chosen_drive].devname, verbose); |
4b1ac34b | 450 | |
96395475 | 451 | if (st->ss->store_super(st, fd, super)) { |
52826846 NB |
452 | close(fd); |
453 | fprintf(stderr, Name ": Could not re-write superblock on %s\n", | |
454 | devices[chosen_drive].devname); | |
455 | devices[chosen_drive].events = 0; | |
4b1ac34b | 456 | free(super); |
52826846 NB |
457 | continue; |
458 | } | |
459 | close(fd); | |
460 | devices[chosen_drive].events = devices[most_recent].events; | |
461 | devices[chosen_drive].uptodate = 1; | |
265e0f17 | 462 | avail[chosen_drive] = 1; |
52826846 | 463 | okcnt++; |
4b1ac34b | 464 | free(super); |
64c4757e | 465 | } |
52826846 NB |
466 | |
467 | /* Now we want to look at the superblock which the kernel will base things on | |
468 | * and compare the devices that we think are working with the devices that the | |
469 | * superblock thinks are working. | |
470 | * If there are differences and --force is given, then update this chosen | |
471 | * superblock. | |
472 | */ | |
cd29a5c8 | 473 | chosen_drive = -1; |
4b1ac34b | 474 | super = NULL; |
56eedc1a | 475 | for (i=0; chosen_drive < 0 && i<bestcnt; i++) { |
52826846 NB |
476 | int j = best[i]; |
477 | int fd; | |
4b1ac34b | 478 | |
52826846 NB |
479 | if (j<0) |
480 | continue; | |
481 | if (!devices[j].uptodate) | |
482 | continue; | |
483 | chosen_drive = j; | |
8b0dabea | 484 | if ((fd=dev_open(devices[j].devname, O_RDONLY|O_EXCL))< 0) { |
52826846 NB |
485 | fprintf(stderr, Name ": Cannot open %s: %s\n", |
486 | devices[j].devname, strerror(errno)); | |
487 | return 1; | |
488 | } | |
82d9eba6 | 489 | if (st->ss->load_super(st,fd, &super, NULL)) { |
52826846 NB |
490 | close(fd); |
491 | fprintf(stderr, Name ": RAID superblock has disappeared from %s\n", | |
492 | devices[j].devname); | |
493 | return 1; | |
494 | } | |
495 | close(fd); | |
496 | } | |
4b1ac34b NB |
497 | if (super == NULL) { |
498 | fprintf(stderr, Name ": No suitable drives found for %s\n", mddev); | |
499 | return 1; | |
500 | } | |
947fd4dd | 501 | st->ss->getinfo_super(&info, &ident2, super); |
56eedc1a | 502 | for (i=0; i<bestcnt; i++) { |
52826846 | 503 | int j = best[i]; |
98c6faba | 504 | unsigned int desired_state; |
11a3e71d | 505 | |
4b1ac34b | 506 | if (i < info.array.raid_disks) |
11a3e71d NB |
507 | desired_state = (1<<MD_DISK_ACTIVE) | (1<<MD_DISK_SYNC); |
508 | else | |
509 | desired_state = 0; | |
510 | ||
52826846 NB |
511 | if (j<0) |
512 | continue; | |
513 | if (!devices[j].uptodate) | |
514 | continue; | |
6a41304b | 515 | info.disk.number = devices[j].disk_nr; |
fbf8a0b7 | 516 | info.disk.raid_disk = i; |
4b1ac34b NB |
517 | info.disk.state = desired_state; |
518 | ||
52826846 | 519 | if (devices[j].uptodate && |
dab6685f | 520 | st->ss->update_super(&info, super, "assemble", NULL, verbose)) { |
52826846 | 521 | if (force) { |
dab6685f NB |
522 | if (verbose >= 0) |
523 | fprintf(stderr, Name ": " | |
524 | "clearing FAULTY flag for device %d in %s for %s\n", | |
525 | j, mddev, devices[j].devname); | |
4b1ac34b | 526 | change = 1; |
52826846 | 527 | } else { |
dab6685f NB |
528 | if (verbose >= -1) |
529 | fprintf(stderr, Name ": " | |
530 | "device %d in %s has wrong state in superblock, but %s seems ok\n", | |
531 | i, mddev, devices[j].devname); | |
52826846 NB |
532 | } |
533 | } | |
4b1ac34b | 534 | #if 0 |
52826846 NB |
535 | if (!devices[j].uptodate && |
536 | !(super.disks[i].state & (1 << MD_DISK_FAULTY))) { | |
537 | fprintf(stderr, Name ": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n", | |
538 | i, mddev); | |
539 | } | |
4b1ac34b | 540 | #endif |
52826846 | 541 | } |
4b1ac34b NB |
542 | if (force && okcnt == info.array.raid_disks-1) { |
543 | /* FIXME check event count */ | |
82d9eba6 | 544 | change += st->ss->update_super(&info, super, "force", |
dab6685f | 545 | devices[chosen_drive].devname, verbose); |
d013a55e | 546 | } |
52826846 | 547 | |
4b1ac34b | 548 | if (change) { |
52826846 | 549 | int fd; |
8b0dabea | 550 | fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL); |
52826846 NB |
551 | if (fd < 0) { |
552 | fprintf(stderr, Name ": Could open %s for write - cannot Assemble array.\n", | |
553 | devices[chosen_drive].devname); | |
554 | return 1; | |
555 | } | |
96395475 | 556 | if (st->ss->store_super(st, fd, super)) { |
52826846 NB |
557 | close(fd); |
558 | fprintf(stderr, Name ": Could not re-write superblock on %s\n", | |
559 | devices[chosen_drive].devname); | |
560 | return 1; | |
561 | } | |
562 | close(fd); | |
52826846 NB |
563 | } |
564 | ||
aa88f531 NB |
565 | /* count number of in-sync devices according to the superblock. |
566 | * We must have this number to start the array without -s or -R | |
567 | */ | |
4b1ac34b | 568 | req_cnt = info.array.working_disks; |
aa88f531 | 569 | |
64c4757e NB |
570 | /* Almost ready to actually *do* something */ |
571 | if (!old_linux) { | |
fbf8a0b7 NB |
572 | int rv; |
573 | if ((vers % 100) >= 1) { /* can use different versions */ | |
574 | mdu_array_info_t inf; | |
575 | memset(&inf, 0, sizeof(inf)); | |
576 | inf.major_version = st->ss->major; | |
577 | inf.minor_version = st->minor_version; | |
578 | rv = ioctl(mdfd, SET_ARRAY_INFO, &inf); | |
579 | } else | |
580 | rv = ioctl(mdfd, SET_ARRAY_INFO, NULL); | |
581 | ||
582 | if (rv) { | |
682c7051 | 583 | fprintf(stderr, Name ": SET_ARRAY_INFO failed for %s: %s\n", |
64c4757e NB |
584 | mddev, strerror(errno)); |
585 | return 1; | |
586 | } | |
11484a63 | 587 | if (ident->bitmap_fd >= 0) { |
c82f047c NB |
588 | if (ioctl(mdfd, SET_BITMAP_FILE, ident->bitmap_fd) != 0) { |
589 | fprintf(stderr, Name ": SET_BITMAP_FILE failed.\n"); | |
590 | return 1; | |
591 | } | |
592 | } | |
593 | ||
52826846 | 594 | /* First, add the raid disks, but add the chosen one last */ |
56eedc1a | 595 | for (i=0; i<= bestcnt; i++) { |
52826846 | 596 | int j; |
56eedc1a | 597 | if (i < bestcnt) { |
52826846 NB |
598 | j = best[i]; |
599 | if (j == chosen_drive) | |
600 | continue; | |
601 | } else | |
602 | j = chosen_drive; | |
603 | ||
56eedc1a | 604 | if (j >= 0 /* && devices[j].uptodate */) { |
64c4757e NB |
605 | mdu_disk_info_t disk; |
606 | memset(&disk, 0, sizeof(disk)); | |
607 | disk.major = devices[j].major; | |
608 | disk.minor = devices[j].minor; | |
609 | if (ioctl(mdfd, ADD_NEW_DISK, &disk)!=0) { | |
682c7051 | 610 | fprintf(stderr, Name ": failed to add %s to %s: %s\n", |
64c4757e NB |
611 | devices[j].devname, |
612 | mddev, | |
613 | strerror(errno)); | |
4b1ac34b | 614 | if (i < info.array.raid_disks || i == bestcnt) |
52826846 NB |
615 | okcnt--; |
616 | else | |
617 | sparecnt--; | |
dab6685f | 618 | } else if (verbose > 0) |
52826846 NB |
619 | fprintf(stderr, Name ": added %s to %s as %d\n", |
620 | devices[j].devname, mddev, devices[j].raid_disk); | |
dab6685f | 621 | } else if (verbose > 0 && i < info.array.raid_disks) |
682c7051 | 622 | fprintf(stderr, Name ": no uptodate device for slot %d of %s\n", |
64c4757e NB |
623 | i, mddev); |
624 | } | |
52826846 | 625 | |
64c4757e NB |
626 | if (runstop == 1 || |
627 | (runstop == 0 && | |
265e0f17 | 628 | ( enough(info.array.level, info.array.raid_disks, info.array.layout, avail, okcnt) && |
aa88f531 NB |
629 | (okcnt >= req_cnt || start_partial_ok) |
630 | ))) { | |
82b27616 | 631 | if (ioctl(mdfd, RUN_ARRAY, NULL)==0) { |
dab6685f NB |
632 | if (verbose >= 0) { |
633 | fprintf(stderr, Name ": %s has been started with %d drive%s", | |
634 | mddev, okcnt, okcnt==1?"":"s"); | |
635 | if (okcnt < info.array.raid_disks) | |
636 | fprintf(stderr, " (out of %d)", info.array.raid_disks); | |
637 | if (sparecnt) | |
638 | fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s"); | |
639 | fprintf(stderr, ".\n"); | |
640 | } | |
64c4757e | 641 | return 0; |
82b27616 | 642 | } |
682c7051 | 643 | fprintf(stderr, Name ": failed to RUN_ARRAY %s: %s\n", |
64c4757e NB |
644 | mddev, strerror(errno)); |
645 | return 1; | |
646 | } | |
82b27616 | 647 | if (runstop == -1) { |
52826846 NB |
648 | fprintf(stderr, Name ": %s assembled from %d drive%s, but not started.\n", |
649 | mddev, okcnt, okcnt==1?"":"s"); | |
64c4757e | 650 | return 0; |
82b27616 | 651 | } |
dab6685f NB |
652 | if (verbose >= 0) { |
653 | fprintf(stderr, Name ": %s assembled from %d drive%s", mddev, okcnt, okcnt==1?"":"s"); | |
654 | if (sparecnt) | |
655 | fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s"); | |
265e0f17 | 656 | if (!enough(info.array.level, info.array.raid_disks, info.array.layout, avail, okcnt)) |
dab6685f NB |
657 | fprintf(stderr, " - not enough to start the array.\n"); |
658 | else { | |
659 | if (req_cnt == info.array.raid_disks) | |
660 | fprintf(stderr, " - need all %d to start it", req_cnt); | |
661 | else | |
662 | fprintf(stderr, " - need %d of %d to start", req_cnt, info.array.raid_disks); | |
663 | fprintf(stderr, " (use --run to insist).\n"); | |
664 | } | |
aa88f531 | 665 | } |
64c4757e | 666 | return 1; |
82b27616 | 667 | } else { |
52826846 NB |
668 | /* The "chosen_drive" is a good choice, and if necessary, the superblock has |
669 | * been updated to point to the current locations of devices. | |
670 | * so we can just start the array | |
82b27616 | 671 | */ |
cd29a5c8 | 672 | unsigned long dev; |
0df46c2a | 673 | dev = makedev(devices[chosen_drive].major, |
82b27616 NB |
674 | devices[chosen_drive].minor); |
675 | if (ioctl(mdfd, START_ARRAY, dev)) { | |
676 | fprintf(stderr, Name ": Cannot start array: %s\n", | |
677 | strerror(errno)); | |
678 | } | |
679 | ||
64c4757e | 680 | } |
e0d19036 | 681 | return 0; |
64c4757e | 682 | } |