]>
Commit | Line | Data |
---|---|---|
64c4757e | 1 | /* |
9a9dab36 | 2 | * mdadm - manage Linux "md" devices aka RAID arrays. |
64c4757e | 3 | * |
4f589ad0 | 4 | * Copyright (C) 2001-2006 Neil Brown <neilb@suse.de> |
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" |
41a3b72a | 31 | #include <ctype.h> |
64c4757e | 32 | |
624920bb NB |
33 | static int name_matches(char *found, char *required, char *homehost) |
34 | { | |
35 | /* See if the name found matches the required name, possibly | |
36 | * prefixed with 'homehost' | |
37 | */ | |
38 | char fnd[33]; | |
39 | ||
40 | strncpy(fnd, found, 32); | |
41 | fnd[32] = 0; | |
42 | if (strcmp(found, required)==0) | |
43 | return 1; | |
44 | if (homehost) { | |
45 | int l = strlen(homehost); | |
46 | if (l < 32 && fnd[l] == ':' && | |
47 | strcmp(fnd+l+1, required)==0) | |
48 | return 1; | |
49 | } | |
50 | return 0; | |
51 | } | |
52 | ||
82d9eba6 | 53 | int Assemble(struct supertype *st, char *mddev, int mdfd, |
8aec876d | 54 | mddev_ident_t ident, |
06b0d786 | 55 | mddev_dev_t devlist, char *backup_file, |
64c4757e | 56 | int readonly, int runstop, |
e5eac01f | 57 | char *update, char *homehost, |
64c4757e NB |
58 | int verbose, int force) |
59 | { | |
60 | /* | |
52826846 NB |
61 | * The task of Assemble is to find a collection of |
62 | * devices that should (according to their superblocks) | |
63 | * form an array, and to give this collection to the MD driver. | |
64 | * In Linux-2.4 and later, this involves submitting a | |
64c4757e NB |
65 | * SET_ARRAY_INFO ioctl with no arg - to prepare |
66 | * the array - and then submit a number of | |
67 | * ADD_NEW_DISK ioctls to add disks into | |
68 | * the array. Finally RUN_ARRAY might | |
69 | * be submitted to start the array. | |
70 | * | |
71 | * Much of the work of Assemble is in finding and/or | |
72 | * checking the disks to make sure they look right. | |
73 | * | |
4b1ac34b | 74 | * If mddev is not set, then scan must be set and we |
64c4757e NB |
75 | * read through the config file for dev+uuid mapping |
76 | * We recurse, setting mddev, for each device that | |
77 | * - isn't running | |
4b1ac34b | 78 | * - has a valid uuid (or any uuid if !uuidset) |
64c4757e NB |
79 | * |
80 | * If mddev is set, we try to determine state of md. | |
81 | * check version - must be at least 0.90.0 | |
82 | * check kernel version. must be at least 2.4. | |
83 | * If not, we can possibly fall back on START_ARRAY | |
84 | * Try to GET_ARRAY_INFO. | |
85 | * If possible, give up | |
86 | * If not, try to STOP_ARRAY just to make sure | |
87 | * | |
88 | * If !uuidset and scan, look in conf-file for uuid | |
89 | * If not found, give up | |
b8a8ccf9 | 90 | * If !devlist and scan and uuidset, get list of devs from conf-file |
64c4757e NB |
91 | * |
92 | * For each device: | |
93 | * Check superblock - discard if bad | |
94 | * Check uuid (set if we don't have one) - discard if no match | |
5787fa49 | 95 | * Check superblock similarity if we have a superblock - discard if different |
4b1ac34b | 96 | * Record events, devicenum |
64c4757e | 97 | * This should give us a list of devices for the array |
4b1ac34b | 98 | * We should collect the most recent event number |
64c4757e NB |
99 | * |
100 | * Count disks with recent enough event count | |
101 | * While force && !enough disks | |
102 | * Choose newest rejected disks, update event count | |
103 | * mark clean and rewrite superblock | |
104 | * If recent kernel: | |
105 | * SET_ARRAY_INFO | |
106 | * foreach device with recent events : ADD_NEW_DISK | |
107 | * if runstop == 1 || "enough" disks and runstop==0 -> RUN_ARRAY | |
108 | * If old kernel: | |
109 | * Check the device numbers in superblock are right | |
110 | * update superblock if any changes | |
111 | * START_ARRAY | |
112 | * | |
113 | */ | |
583315d9 | 114 | int clean = 0; |
d55e3aef | 115 | int must_close = 0; |
64c4757e | 116 | int old_linux = 0; |
41a3b72a | 117 | int vers = 0; /* Keep gcc quite - it really is initialised */ |
64c4757e NB |
118 | struct { |
119 | char *devname; | |
213ee40b NB |
120 | int uptodate; /* set once we decide that this device is as |
121 | * recent as everything else in the array. | |
122 | */ | |
123 | struct mdinfo i; | |
5787fa49 | 124 | } *devices; |
56eedc1a | 125 | int *best = NULL; /* indexed by raid_disk */ |
98c6faba NB |
126 | unsigned int bestcnt = 0; |
127 | int devcnt = 0; | |
128 | unsigned int okcnt, sparecnt; | |
129 | unsigned int req_cnt; | |
130 | unsigned int i; | |
64c4757e | 131 | int most_recent = 0; |
cd29a5c8 | 132 | int chosen_drive; |
52826846 | 133 | int change = 0; |
cd29a5c8 | 134 | int inargv = 0; |
bf4fb153 | 135 | int bitmap_done; |
589395d6 | 136 | int start_partial_ok = (runstop >= 0) && (force || devlist==NULL || mdfd < 0); |
98c6faba | 137 | unsigned int num_devs; |
5787fa49 | 138 | mddev_dev_t tmpdev; |
4b1ac34b | 139 | struct mdinfo info; |
265e0f17 | 140 | char *avail; |
308e1801 | 141 | int nextspare = 0; |
8a46fe84 | 142 | |
f35f2525 N |
143 | memset(&info, 0, sizeof(info)); |
144 | ||
682c7051 | 145 | if (get_linux_version() < 2004000) |
64c4757e NB |
146 | old_linux = 1; |
147 | ||
8a46fe84 NB |
148 | if (mdfd >= 0) { |
149 | vers = md_get_version(mdfd); | |
150 | if (vers <= 0) { | |
151 | fprintf(stderr, Name ": %s appears not to be an md device.\n", mddev); | |
152 | return 1; | |
153 | } | |
154 | if (vers < 9000) { | |
155 | fprintf(stderr, Name ": Assemble requires driver version 0.90.0 or later.\n" | |
156 | " Upgrade your kernel or try --build\n"); | |
157 | return 1; | |
158 | } | |
64c4757e | 159 | |
8a46fe84 NB |
160 | if (ioctl(mdfd, GET_ARRAY_INFO, &info.array)>=0) { |
161 | fprintf(stderr, Name ": device %s already active - cannot assemble it\n", | |
162 | mddev); | |
163 | return 1; | |
164 | } | |
165 | ioctl(mdfd, STOP_ARRAY, NULL); /* just incase it was started but has no content */ | |
166 | } | |
64c4757e | 167 | /* |
52826846 NB |
168 | * If any subdevs are listed, then any that don't |
169 | * match ident are discarded. Remainder must all match and | |
170 | * become the array. | |
171 | * If no subdevs, then we scan all devices in the config file, but | |
172 | * there must be something in the identity | |
64c4757e | 173 | */ |
64c4757e | 174 | |
cd29a5c8 | 175 | if (!devlist && |
52826846 NB |
176 | ident->uuid_set == 0 && |
177 | ident->super_minor < 0 && | |
178 | ident->devices == NULL) { | |
179 | fprintf(stderr, Name ": No identity information available for %s - cannot assemble.\n", | |
8a46fe84 | 180 | mddev ? mddev : "further assembly"); |
52826846 | 181 | return 1; |
64c4757e | 182 | } |
cd29a5c8 | 183 | if (devlist == NULL) |
8aec876d | 184 | devlist = conf_get_devs(); |
da6b5ca9 NB |
185 | else if (mdfd >= 0) |
186 | inargv = 1; | |
64c4757e | 187 | |
60e1bc1a NB |
188 | try_again: |
189 | ||
5787fa49 NB |
190 | tmpdev = devlist; num_devs = 0; |
191 | while (tmpdev) { | |
da6b5ca9 NB |
192 | if (tmpdev->used) |
193 | tmpdev->used = 2; | |
194 | else | |
195 | num_devs++; | |
5787fa49 NB |
196 | tmpdev = tmpdev->next; |
197 | } | |
5787fa49 NB |
198 | devices = malloc(num_devs * sizeof(*devices)); |
199 | ||
82d9eba6 | 200 | if (!st && ident->st) st = ident->st; |
64c4757e | 201 | |
dab6685f | 202 | if (verbose>0) |
82b27616 | 203 | fprintf(stderr, Name ": looking for devices for %s\n", |
8a46fe84 | 204 | mddev ? mddev : "further assembly"); |
82b27616 | 205 | |
811e6cbe NB |
206 | /* first walk the list of devices to find a consistent set |
207 | * that match the criterea, if that is possible. | |
208 | * We flag the one we like with 'used'. | |
209 | */ | |
210 | for (tmpdev = devlist; | |
211 | tmpdev; | |
212 | tmpdev = tmpdev->next) { | |
213 | char *devname = tmpdev->devname; | |
64c4757e NB |
214 | int dfd; |
215 | struct stat stb; | |
3da92f27 | 216 | struct supertype *tst = dup_super(st); |
52826846 | 217 | |
da6b5ca9 NB |
218 | if (tmpdev->used > 1) continue; |
219 | ||
52826846 | 220 | if (ident->devices && |
56eedc1a | 221 | !match_oneof(ident->devices, devname)) { |
6a41304b | 222 | if ((inargv && verbose>=0) || verbose > 0) |
56eedc1a | 223 | fprintf(stderr, Name ": %s is not one of %s\n", devname, ident->devices); |
52826846 | 224 | continue; |
56eedc1a | 225 | } |
4b1ac34b | 226 | |
8b0dabea | 227 | dfd = dev_open(devname, O_RDONLY|O_EXCL); |
64c4757e | 228 | if (dfd < 0) { |
6a41304b | 229 | if ((inargv && verbose >= 0) || verbose > 0) |
682c7051 | 230 | fprintf(stderr, Name ": cannot open device %s: %s\n", |
64c4757e | 231 | devname, strerror(errno)); |
da6b5ca9 | 232 | tmpdev->used = 2; |
52826846 NB |
233 | } else if (fstat(dfd, &stb)< 0) { |
234 | /* Impossible! */ | |
235 | fprintf(stderr, Name ": fstat failed for %s: %s\n", | |
236 | devname, strerror(errno)); | |
da6b5ca9 | 237 | tmpdev->used = 2; |
cd29a5c8 NB |
238 | } else if ((stb.st_mode & S_IFMT) != S_IFBLK) { |
239 | fprintf(stderr, Name ": %s is not a block device.\n", | |
52826846 | 240 | devname); |
da6b5ca9 | 241 | tmpdev->used = 2; |
82d9eba6 | 242 | } else if (!tst && (tst = guess_super(dfd)) == NULL) { |
6a41304b | 243 | if ((inargv && verbose >= 0) || verbose > 0) |
da6b5ca9 NB |
244 | fprintf(stderr, Name ": no recogniseable superblock on %s\n", |
245 | devname); | |
246 | tmpdev->used = 2; | |
3da92f27 | 247 | } else if (tst->ss->load_super(tst,dfd, NULL)) { |
6a41304b | 248 | if ((inargv && verbose >= 0) || verbose > 0) |
682c7051 | 249 | fprintf( stderr, Name ": no RAID superblock on %s\n", |
64c4757e | 250 | devname); |
52826846 | 251 | } else { |
3da92f27 | 252 | tst->ss->getinfo_super(tst, &info); |
64c4757e | 253 | } |
c06487ce | 254 | if (dfd >= 0) close(dfd); |
52826846 | 255 | |
838acbc2 | 256 | if (ident->uuid_set && (!update || strcmp(update, "uuid")!= 0) && |
3da92f27 NB |
257 | (!tst || !tst->sb || |
258 | same_uuid(info.uuid, ident->uuid, tst->ss->swapuuid)==0)) { | |
6a41304b | 259 | if ((inargv && verbose >= 0) || verbose > 0) |
52826846 NB |
260 | fprintf(stderr, Name ": %s has wrong uuid.\n", |
261 | devname); | |
df37ffc0 | 262 | goto loop; |
82b27616 | 263 | } |
c4f12c13 | 264 | if (ident->name[0] && (!update || strcmp(update, "name")!= 0) && |
3da92f27 NB |
265 | (!tst || !tst->sb || |
266 | name_matches(info.name, ident->name, homehost)==0)) { | |
6a41304b | 267 | if ((inargv && verbose >= 0) || verbose > 0) |
947fd4dd NB |
268 | fprintf(stderr, Name ": %s has wrong name.\n", |
269 | devname); | |
df37ffc0 | 270 | goto loop; |
947fd4dd | 271 | } |
98c6faba | 272 | if (ident->super_minor != UnSet && |
3da92f27 NB |
273 | (!tst || !tst->sb || |
274 | ident->super_minor != info.array.md_minor)) { | |
6a41304b | 275 | if ((inargv && verbose >= 0) || verbose > 0) |
52826846 | 276 | fprintf(stderr, Name ": %s has wrong super-minor.\n", |
64c4757e | 277 | devname); |
df37ffc0 | 278 | goto loop; |
64c4757e | 279 | } |
98c6faba | 280 | if (ident->level != UnSet && |
3da92f27 NB |
281 | (!tst || !tst->sb || |
282 | ident->level != info.array.level)) { | |
6a41304b | 283 | if ((inargv && verbose >= 0) || verbose > 0) |
cd29a5c8 NB |
284 | fprintf(stderr, Name ": %s has wrong raid level.\n", |
285 | devname); | |
df37ffc0 | 286 | goto loop; |
cd29a5c8 | 287 | } |
98c6faba | 288 | if (ident->raid_disks != UnSet && |
3da92f27 NB |
289 | (!tst || !tst->sb || |
290 | ident->raid_disks!= info.array.raid_disks)) { | |
6a41304b | 291 | if ((inargv && verbose >= 0) || verbose > 0) |
cd29a5c8 NB |
292 | fprintf(stderr, Name ": %s requires wrong number of drives.\n", |
293 | devname); | |
df37ffc0 | 294 | goto loop; |
cd29a5c8 | 295 | } |
da6b5ca9 | 296 | if (mdfd < 0) { |
3da92f27 | 297 | if (tst == NULL || tst->sb == NULL) |
da6b5ca9 | 298 | continue; |
589395d6 | 299 | if (update == NULL && |
3da92f27 | 300 | tst->ss->match_home(tst, homehost)==0) { |
da6b5ca9 NB |
301 | if ((inargv && verbose >= 0) || verbose > 0) |
302 | fprintf(stderr, Name ": %s is not built for host %s.\n", | |
303 | devname, homehost); | |
304 | /* Auto-assemble, and this is not a usable host */ | |
589395d6 NB |
305 | /* if update != NULL, we are updating the host |
306 | * name... */ | |
df37ffc0 | 307 | goto loop; |
da6b5ca9 NB |
308 | } |
309 | } | |
83b6208e | 310 | /* If we are this far, then we are nearly commited to this device. |
52826846 | 311 | * If the super_block doesn't exist, or doesn't match others, |
83b6208e NB |
312 | * then we probably cannot continue |
313 | * However if one of the arrays is for the homehost, and | |
314 | * the other isn't that can disambiguate. | |
52826846 | 315 | */ |
52826846 | 316 | |
3da92f27 | 317 | if (!tst || !tst->sb) { |
52826846 NB |
318 | fprintf(stderr, Name ": %s has no superblock - assembly aborted\n", |
319 | devname); | |
ddd1a492 NB |
320 | if (st) |
321 | st->ss->free_super(st); | |
52826846 NB |
322 | return 1; |
323 | } | |
838acbc2 | 324 | |
83b6208e | 325 | if (st == NULL) |
3da92f27 NB |
326 | st = dup_super(tst); |
327 | if (st->minor_version == -1) | |
328 | st->minor_version = tst->minor_version; | |
83b6208e NB |
329 | if (st->ss != tst->ss || |
330 | st->minor_version != tst->minor_version || | |
64557c33 | 331 | st->ss->compare_super(st, tst) != 0) { |
83b6208e | 332 | /* Some mismatch. If exactly one array matches this host, |
da6b5ca9 NB |
333 | * we can resolve on that one. |
334 | * Or, if we are auto assembling, we just ignore the second | |
335 | * for now. | |
83b6208e | 336 | */ |
da6b5ca9 | 337 | if (mdfd < 0) |
df37ffc0 | 338 | goto loop; |
83b6208e | 339 | if (homehost) { |
3da92f27 NB |
340 | int first = st->ss->match_home(st, homehost); |
341 | int last = tst->ss->match_home(tst, homehost); | |
83b6208e NB |
342 | if (first+last == 1) { |
343 | /* We can do something */ | |
344 | if (first) {/* just ignore this one */ | |
345 | if ((inargv && verbose >= 0) || verbose > 0) | |
346 | fprintf(stderr, Name ": %s misses out due to wrong homehost\n", | |
347 | devname); | |
df37ffc0 | 348 | goto loop; |
83b6208e NB |
349 | } else { /* reject all those sofar */ |
350 | mddev_dev_t td; | |
351 | if ((inargv && verbose >= 0) || verbose > 0) | |
352 | fprintf(stderr, Name ": %s overrides previous devices due to good homehost\n", | |
353 | devname); | |
354 | for (td=devlist; td != tmpdev; td=td->next) | |
355 | if (td->used == 1) | |
356 | td->used = 0; | |
357 | tmpdev->used = 1; | |
df37ffc0 | 358 | goto loop; |
83b6208e NB |
359 | } |
360 | } | |
361 | } | |
52826846 NB |
362 | fprintf(stderr, Name ": superblock on %s doesn't match others - assembly aborted\n", |
363 | devname); | |
3da92f27 NB |
364 | tst->ss->free_super(tst); |
365 | st->ss->free_super(st); | |
52826846 | 366 | return 1; |
64c4757e NB |
367 | } |
368 | ||
811e6cbe | 369 | tmpdev->used = 1; |
df37ffc0 NB |
370 | |
371 | loop: | |
3d2b16e7 NB |
372 | if (tst) |
373 | tst->ss->free_super(tst); | |
811e6cbe NB |
374 | } |
375 | ||
8a46fe84 NB |
376 | if (mdfd < 0) { |
377 | /* So... it is up to me to open the device. | |
378 | * We create a name '/dev/md/XXX' based on the info in the | |
379 | * superblock, and call open_mddev on that | |
380 | */ | |
da6b5ca9 NB |
381 | mdu_array_info_t inf; |
382 | char *c; | |
1c203a4b | 383 | if (!st || !st->sb) { |
d55e3aef | 384 | return 2; |
da6b5ca9 | 385 | } |
3da92f27 | 386 | st->ss->getinfo_super(st, &info); |
da6b5ca9 NB |
387 | c = strchr(info.name, ':'); |
388 | if (c) c++; else c= info.name; | |
41a3b72a NB |
389 | if (isdigit(*c) && ((ident->autof & 7)==4 || (ident->autof&7)==6)) |
390 | /* /dev/md/d0 style for partitionable */ | |
391 | asprintf(&mddev, "/dev/md/d%s", c); | |
392 | else | |
393 | asprintf(&mddev, "/dev/md/%s", c); | |
da6b5ca9 | 394 | mdfd = open_mddev(mddev, ident->autof); |
60e1bc1a | 395 | if (mdfd < 0) { |
3da92f27 | 396 | st->ss->free_super(st); |
60e1bc1a | 397 | free(devices); |
60e1bc1a NB |
398 | goto try_again; |
399 | } | |
da6b5ca9 NB |
400 | vers = md_get_version(mdfd); |
401 | if (ioctl(mdfd, GET_ARRAY_INFO, &inf)==0) { | |
60e1bc1a NB |
402 | for (tmpdev = devlist ; |
403 | tmpdev && tmpdev->used != 1; | |
404 | tmpdev = tmpdev->next) | |
405 | ; | |
da6b5ca9 | 406 | fprintf(stderr, Name ": %s already active, cannot restart it!\n", mddev); |
60e1bc1a NB |
407 | if (tmpdev) |
408 | fprintf(stderr, Name ": %s needed for %s...\n", | |
409 | mddev, tmpdev->devname); | |
da6b5ca9 | 410 | close(mdfd); |
60e1bc1a | 411 | mdfd = -1; |
3da92f27 | 412 | st->ss->free_super(st); |
60e1bc1a | 413 | free(devices); |
60e1bc1a | 414 | goto try_again; |
da6b5ca9 | 415 | } |
d55e3aef | 416 | must_close = 1; |
8a46fe84 NB |
417 | } |
418 | ||
811e6cbe | 419 | /* Ok, no bad inconsistancy, we can try updating etc */ |
bf4fb153 | 420 | bitmap_done = 0; |
da6b5ca9 | 421 | for (tmpdev = devlist; tmpdev; tmpdev=tmpdev->next) if (tmpdev->used == 1) { |
811e6cbe NB |
422 | char *devname = tmpdev->devname; |
423 | struct stat stb; | |
5787fa49 | 424 | /* looks like a good enough match to update the super block if needed */ |
d1f1011b | 425 | #ifndef MDASSEMBLE |
5787fa49 | 426 | if (update) { |
811e6cbe | 427 | int dfd; |
4b1ac34b NB |
428 | /* prepare useful information in info structures */ |
429 | struct stat stb2; | |
3da92f27 | 430 | struct supertype *tst; |
4b1ac34b | 431 | fstat(mdfd, &stb2); |
7d99579f NB |
432 | |
433 | if (strcmp(update, "uuid")==0 && | |
434 | !ident->uuid_set) { | |
435 | int rfd; | |
436 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || | |
437 | read(rfd, ident->uuid, 16) != 16) { | |
438 | *(__u32*)(ident->uuid) = random(); | |
439 | *(__u32*)(ident->uuid+1) = random(); | |
440 | *(__u32*)(ident->uuid+2) = random(); | |
441 | *(__u32*)(ident->uuid+3) = random(); | |
442 | } | |
443 | if (rfd >= 0) close(rfd); | |
7d99579f | 444 | } |
811e6cbe NB |
445 | dfd = dev_open(devname, O_RDWR|O_EXCL); |
446 | ||
0430ed48 NB |
447 | remove_partitions(dfd); |
448 | ||
3da92f27 NB |
449 | tst = dup_super(st); |
450 | tst->ss->load_super(tst, dfd, NULL); | |
451 | tst->ss->getinfo_super(tst, &info); | |
811e6cbe | 452 | |
7d99579f | 453 | memcpy(info.uuid, ident->uuid, 16); |
e5eac01f | 454 | strcpy(info.name, ident->name); |
811e6cbe NB |
455 | info.array.md_minor = minor(stb2.st_rdev); |
456 | ||
3da92f27 NB |
457 | tst->ss->update_super(tst, &info, update, |
458 | devname, verbose, | |
459 | ident->uuid_set, homehost); | |
e5eac01f NB |
460 | if (strcmp(update, "uuid")==0 && |
461 | !ident->uuid_set) { | |
462 | ident->uuid_set = 1; | |
463 | memcpy(ident->uuid, info.uuid, 16); | |
464 | } | |
b8a8ccf9 | 465 | if (dfd < 0) |
5787fa49 NB |
466 | fprintf(stderr, Name ": Cannot open %s for superblock update\n", |
467 | devname); | |
3da92f27 | 468 | else if (tst->ss->store_super(tst, dfd)) |
5787fa49 NB |
469 | fprintf(stderr, Name ": Could not re-write superblock on %s.\n", |
470 | devname); | |
471 | if (dfd >= 0) | |
472 | close(dfd); | |
8131b493 NB |
473 | |
474 | if (strcmp(update, "uuid")==0 && | |
bf4fb153 | 475 | ident->bitmap_fd >= 0 && !bitmap_done) { |
3da92f27 NB |
476 | if (bitmap_update_uuid(ident->bitmap_fd, |
477 | info.uuid, | |
478 | tst->ss->swapuuid) != 0) | |
bf4fb153 NB |
479 | fprintf(stderr, Name ": Could not update uuid on external bitmap.\n"); |
480 | else | |
481 | bitmap_done = 1; | |
482 | } | |
3da92f27 | 483 | tst->ss->free_super(tst); |
d1f1011b NB |
484 | } else |
485 | #endif | |
486 | { | |
30e1b9a5 | 487 | struct supertype *tst = dup_super(st); |
da6b5ca9 NB |
488 | int dfd; |
489 | dfd = dev_open(devname, O_RDWR|O_EXCL); | |
490 | ||
0430ed48 NB |
491 | remove_partitions(dfd); |
492 | ||
3da92f27 NB |
493 | tst->ss->load_super(tst, dfd, NULL); |
494 | tst->ss->getinfo_super(tst, &info); | |
495 | tst->ss->free_super(tst); | |
da6b5ca9 | 496 | close(dfd); |
5787fa49 NB |
497 | } |
498 | ||
811e6cbe NB |
499 | stat(devname, &stb); |
500 | ||
dab6685f | 501 | if (verbose > 0) |
cd29a5c8 | 502 | fprintf(stderr, Name ": %s is identified as a member of %s, slot %d.\n", |
4b1ac34b | 503 | devname, mddev, info.disk.raid_disk); |
64c4757e | 504 | devices[devcnt].devname = devname; |
64c4757e | 505 | devices[devcnt].uptodate = 0; |
213ee40b NB |
506 | devices[devcnt].i = info; |
507 | devices[devcnt].i.disk.major = major(stb.st_rdev); | |
508 | devices[devcnt].i.disk.minor = minor(stb.st_rdev); | |
64c4757e | 509 | if (most_recent < devcnt) { |
213ee40b NB |
510 | if (devices[devcnt].i.events |
511 | > devices[most_recent].i.events) | |
64c4757e NB |
512 | most_recent = devcnt; |
513 | } | |
b8a8ccf9 | 514 | if (info.array.level == -4) |
5787fa49 NB |
515 | /* with multipath, the raid_disk from the superblock is meaningless */ |
516 | i = devcnt; | |
517 | else | |
213ee40b | 518 | i = devices[devcnt].i.disk.raid_disk; |
308e1801 NB |
519 | if (i+1 == 0) { |
520 | if (nextspare < info.array.raid_disks) | |
521 | nextspare = info.array.raid_disks; | |
522 | i = nextspare++; | |
08110d41 NB |
523 | } else { |
524 | if (i >= info.array.raid_disks && | |
525 | i >= nextspare) | |
526 | nextspare = i+1; | |
308e1801 | 527 | } |
98c6faba | 528 | if (i < 10000) { |
56eedc1a | 529 | if (i >= bestcnt) { |
98c6faba | 530 | unsigned int newbestcnt = i+10; |
56eedc1a | 531 | int *newbest = malloc(sizeof(int)*newbestcnt); |
98c6faba | 532 | unsigned int c; |
56eedc1a NB |
533 | for (c=0; c < newbestcnt; c++) |
534 | if (c < bestcnt) | |
535 | newbest[c] = best[c]; | |
536 | else | |
537 | newbest[c] = -1; | |
538 | if (best)free(best); | |
539 | best = newbest; | |
540 | bestcnt = newbestcnt; | |
541 | } | |
6a255b69 | 542 | if (best[i] >=0 && |
213ee40b NB |
543 | devices[best[i]].i.events |
544 | == devices[devcnt].i.events | |
545 | && (devices[best[i]].i.disk.minor | |
546 | != devices[devcnt].i.disk.minor) | |
b8ac1967 NB |
547 | && st->ss == &super0 |
548 | && info.array.level != LEVEL_MULTIPATH) { | |
6a255b69 NB |
549 | /* two different devices with identical superblock. |
550 | * Could be a mis-detection caused by overlapping | |
551 | * partitions. fail-safe. | |
552 | */ | |
553 | fprintf(stderr, Name ": WARNING %s and %s appear" | |
554 | " to have very similar superblocks.\n" | |
555 | " If they are really different, " | |
556 | "please --zero the superblock on one\n" | |
d2df86e0 NB |
557 | " If they are the same or overlap," |
558 | " please remove one from %s.\n", | |
559 | devices[best[i]].devname, devname, | |
560 | inargv ? "the list" : | |
561 | "the\n DEVICE list in mdadm.conf" | |
562 | ); | |
6a255b69 NB |
563 | if (must_close) close(mdfd); |
564 | return 1; | |
565 | } | |
52826846 | 566 | if (best[i] == -1 |
213ee40b NB |
567 | || (devices[best[i]].i.events |
568 | < devices[devcnt].i.events)) | |
52826846 | 569 | best[i] = devcnt; |
56eedc1a | 570 | } |
64c4757e | 571 | devcnt++; |
df37ffc0 | 572 | } |
4b1ac34b | 573 | |
64c4757e | 574 | if (devcnt == 0) { |
682c7051 | 575 | fprintf(stderr, Name ": no devices found for %s\n", |
64c4757e | 576 | mddev); |
3d2b16e7 NB |
577 | if (st) |
578 | st->ss->free_super(st); | |
d55e3aef | 579 | if (must_close) close(mdfd); |
64c4757e NB |
580 | return 1; |
581 | } | |
4b1ac34b | 582 | |
3d2b16e7 NB |
583 | if (update && strcmp(update, "byteorder")==0) |
584 | st->minor_version = 90; | |
585 | ||
3da92f27 | 586 | st->ss->getinfo_super(st, &info); |
583315d9 | 587 | clean = info.array.state & 1; |
4b1ac34b | 588 | |
64c4757e NB |
589 | /* now we have some devices that might be suitable. |
590 | * I wonder how many | |
591 | */ | |
265e0f17 NB |
592 | avail = malloc(info.array.raid_disks); |
593 | memset(avail, 0, info.array.raid_disks); | |
64c4757e | 594 | okcnt = 0; |
52826846 | 595 | sparecnt=0; |
56eedc1a | 596 | for (i=0; i< bestcnt ;i++) { |
64c4757e | 597 | int j = best[i]; |
ee04451c NB |
598 | int event_margin = 1; /* always allow a difference of '1' |
599 | * like the kernel does | |
600 | */ | |
64c4757e | 601 | if (j < 0) continue; |
d013a55e NB |
602 | /* note: we ignore error flags in multipath arrays |
603 | * as they don't make sense | |
604 | */ | |
4b1ac34b | 605 | if (info.array.level != -4) |
213ee40b NB |
606 | if (!(devices[j].i.disk.state & (1<<MD_DISK_SYNC))) { |
607 | if (!(devices[j].i.disk.state | |
608 | & (1<<MD_DISK_FAULTY))) | |
aa88f531 | 609 | sparecnt++; |
d013a55e | 610 | continue; |
aa88f531 | 611 | } |
213ee40b NB |
612 | if (devices[j].i.events+event_margin >= |
613 | devices[most_recent].i.events) { | |
64c4757e | 614 | devices[j].uptodate = 1; |
265e0f17 | 615 | if (i < info.array.raid_disks) { |
52826846 | 616 | okcnt++; |
265e0f17 NB |
617 | avail[i]=1; |
618 | } else | |
52826846 | 619 | sparecnt++; |
64c4757e NB |
620 | } |
621 | } | |
265e0f17 | 622 | while (force && !enough(info.array.level, info.array.raid_disks, |
583315d9 | 623 | info.array.layout, 1, |
265e0f17 | 624 | avail, okcnt)) { |
64c4757e NB |
625 | /* Choose the newest best drive which is |
626 | * not up-to-date, update the superblock | |
627 | * and add it. | |
628 | */ | |
52826846 | 629 | int fd; |
3da92f27 | 630 | struct supertype *tst; |
c5a6f9a6 | 631 | long long current_events; |
cd29a5c8 | 632 | chosen_drive = -1; |
4b1ac34b | 633 | for (i=0; i<info.array.raid_disks && i < bestcnt; i++) { |
52826846 NB |
634 | int j = best[i]; |
635 | if (j>=0 && | |
636 | !devices[j].uptodate && | |
213ee40b | 637 | devices[j].i.events > 0 && |
52826846 | 638 | (chosen_drive < 0 || |
213ee40b NB |
639 | devices[j].i.events |
640 | > devices[chosen_drive].i.events)) | |
52826846 NB |
641 | chosen_drive = j; |
642 | } | |
643 | if (chosen_drive < 0) | |
644 | break; | |
213ee40b | 645 | current_events = devices[chosen_drive].i.events; |
c5a6f9a6 | 646 | add_another: |
dab6685f NB |
647 | if (verbose >= 0) |
648 | fprintf(stderr, Name ": forcing event count in %s(%d) from %d upto %d\n", | |
213ee40b NB |
649 | devices[chosen_drive].devname, |
650 | devices[chosen_drive].i.disk.raid_disk, | |
651 | (int)(devices[chosen_drive].i.events), | |
652 | (int)(devices[most_recent].i.events)); | |
8b0dabea | 653 | fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL); |
52826846 NB |
654 | if (fd < 0) { |
655 | fprintf(stderr, Name ": Couldn't open %s for write - not updating\n", | |
656 | devices[chosen_drive].devname); | |
213ee40b | 657 | devices[chosen_drive].i.events = 0; |
52826846 NB |
658 | continue; |
659 | } | |
3da92f27 | 660 | tst = dup_super(st); |
60b435db | 661 | if (tst->ss->load_super(tst,fd, NULL)) { |
52826846 NB |
662 | close(fd); |
663 | fprintf(stderr, Name ": RAID superblock disappeared from %s - not updating.\n", | |
664 | devices[chosen_drive].devname); | |
213ee40b | 665 | devices[chosen_drive].i.events = 0; |
52826846 NB |
666 | continue; |
667 | } | |
213ee40b | 668 | info.events = devices[most_recent].i.events; |
3da92f27 | 669 | tst->ss->update_super(tst, &info, "force-one", |
67a8c82d NB |
670 | devices[chosen_drive].devname, verbose, |
671 | 0, NULL); | |
4b1ac34b | 672 | |
3da92f27 | 673 | if (tst->ss->store_super(tst, fd)) { |
52826846 NB |
674 | close(fd); |
675 | fprintf(stderr, Name ": Could not re-write superblock on %s\n", | |
676 | devices[chosen_drive].devname); | |
213ee40b | 677 | devices[chosen_drive].i.events = 0; |
3da92f27 | 678 | tst->ss->free_super(tst); |
52826846 NB |
679 | continue; |
680 | } | |
681 | close(fd); | |
213ee40b | 682 | devices[chosen_drive].i.events = devices[most_recent].i.events; |
52826846 | 683 | devices[chosen_drive].uptodate = 1; |
265e0f17 | 684 | avail[chosen_drive] = 1; |
52826846 | 685 | okcnt++; |
3da92f27 | 686 | tst->ss->free_super(tst); |
c5a6f9a6 NB |
687 | |
688 | /* If there are any other drives of the same vintage, | |
689 | * add them in as well. We can't lose and we might gain | |
690 | */ | |
691 | for (i=0; i<info.array.raid_disks && i < bestcnt ; i++) { | |
692 | int j = best[i]; | |
693 | if (j >= 0 && | |
694 | !devices[j].uptodate && | |
213ee40b NB |
695 | devices[j].i.events > 0 && |
696 | devices[j].i.events == current_events) { | |
c5a6f9a6 NB |
697 | chosen_drive = j; |
698 | goto add_another; | |
699 | } | |
700 | } | |
64c4757e | 701 | } |
52826846 NB |
702 | |
703 | /* Now we want to look at the superblock which the kernel will base things on | |
704 | * and compare the devices that we think are working with the devices that the | |
705 | * superblock thinks are working. | |
706 | * If there are differences and --force is given, then update this chosen | |
707 | * superblock. | |
708 | */ | |
cd29a5c8 | 709 | chosen_drive = -1; |
3da92f27 | 710 | st->ss->free_super(st); |
56eedc1a | 711 | for (i=0; chosen_drive < 0 && i<bestcnt; i++) { |
52826846 NB |
712 | int j = best[i]; |
713 | int fd; | |
4b1ac34b | 714 | |
52826846 NB |
715 | if (j<0) |
716 | continue; | |
717 | if (!devices[j].uptodate) | |
718 | continue; | |
719 | chosen_drive = j; | |
8b0dabea | 720 | if ((fd=dev_open(devices[j].devname, O_RDONLY|O_EXCL))< 0) { |
52826846 NB |
721 | fprintf(stderr, Name ": Cannot open %s: %s\n", |
722 | devices[j].devname, strerror(errno)); | |
d55e3aef | 723 | if (must_close) close(mdfd); |
52826846 NB |
724 | return 1; |
725 | } | |
3da92f27 | 726 | if (st->ss->load_super(st,fd, NULL)) { |
52826846 NB |
727 | close(fd); |
728 | fprintf(stderr, Name ": RAID superblock has disappeared from %s\n", | |
729 | devices[j].devname); | |
d55e3aef | 730 | if (must_close) close(mdfd); |
52826846 NB |
731 | return 1; |
732 | } | |
733 | close(fd); | |
734 | } | |
3da92f27 | 735 | if (st->sb == NULL) { |
4b1ac34b | 736 | fprintf(stderr, Name ": No suitable drives found for %s\n", mddev); |
d55e3aef | 737 | if (must_close) close(mdfd); |
4b1ac34b NB |
738 | return 1; |
739 | } | |
3da92f27 | 740 | st->ss->getinfo_super(st, &info); |
f35f2525 N |
741 | #ifndef MDASSEMBLE |
742 | sysfs_init(&info, mdfd, 0); | |
743 | #endif | |
56eedc1a | 744 | for (i=0; i<bestcnt; i++) { |
52826846 | 745 | int j = best[i]; |
98c6faba | 746 | unsigned int desired_state; |
11a3e71d | 747 | |
4b1ac34b | 748 | if (i < info.array.raid_disks) |
11a3e71d NB |
749 | desired_state = (1<<MD_DISK_ACTIVE) | (1<<MD_DISK_SYNC); |
750 | else | |
751 | desired_state = 0; | |
752 | ||
52826846 NB |
753 | if (j<0) |
754 | continue; | |
755 | if (!devices[j].uptodate) | |
756 | continue; | |
4b1ac34b | 757 | |
213ee40b NB |
758 | devices[j].i.disk.state = desired_state; |
759 | ||
760 | if (st->ss->update_super(st, &devices[j].i, "assemble", NULL, | |
68c7d6d7 | 761 | verbose, 0, NULL)) { |
52826846 | 762 | if (force) { |
dab6685f NB |
763 | if (verbose >= 0) |
764 | fprintf(stderr, Name ": " | |
765 | "clearing FAULTY flag for device %d in %s for %s\n", | |
766 | j, mddev, devices[j].devname); | |
4b1ac34b | 767 | change = 1; |
52826846 | 768 | } else { |
dab6685f NB |
769 | if (verbose >= -1) |
770 | fprintf(stderr, Name ": " | |
771 | "device %d in %s has wrong state in superblock, but %s seems ok\n", | |
772 | i, mddev, devices[j].devname); | |
52826846 NB |
773 | } |
774 | } | |
4b1ac34b | 775 | #if 0 |
213ee40b | 776 | if (!(super.disks[i].i.disk.state & (1 << MD_DISK_FAULTY))) { |
52826846 NB |
777 | fprintf(stderr, Name ": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n", |
778 | i, mddev); | |
779 | } | |
4b1ac34b | 780 | #endif |
52826846 | 781 | } |
c5a6f9a6 NB |
782 | if (force && !clean && |
783 | !enough(info.array.level, info.array.raid_disks, | |
784 | info.array.layout, clean, | |
785 | avail, okcnt)) { | |
3da92f27 | 786 | change += st->ss->update_super(st, &info, "force-array", |
67a8c82d NB |
787 | devices[chosen_drive].devname, verbose, |
788 | 0, NULL); | |
583315d9 | 789 | clean = 1; |
d013a55e | 790 | } |
52826846 | 791 | |
4b1ac34b | 792 | if (change) { |
52826846 | 793 | int fd; |
8b0dabea | 794 | fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL); |
52826846 | 795 | if (fd < 0) { |
353632d9 | 796 | fprintf(stderr, Name ": Could not open %s for write - cannot Assemble array.\n", |
52826846 | 797 | devices[chosen_drive].devname); |
d55e3aef | 798 | if (must_close) close(mdfd); |
52826846 NB |
799 | return 1; |
800 | } | |
3da92f27 | 801 | if (st->ss->store_super(st, fd)) { |
52826846 NB |
802 | close(fd); |
803 | fprintf(stderr, Name ": Could not re-write superblock on %s\n", | |
804 | devices[chosen_drive].devname); | |
d55e3aef | 805 | if (must_close) close(mdfd); |
52826846 NB |
806 | return 1; |
807 | } | |
808 | close(fd); | |
52826846 NB |
809 | } |
810 | ||
353632d9 NB |
811 | /* If we are in the middle of a reshape we may need to restore saved data |
812 | * that was moved aside due to the reshape overwriting live data | |
813 | * The code of doing this lives in Grow.c | |
814 | */ | |
39c5a909 | 815 | #ifndef MDASSEMBLE |
353632d9 NB |
816 | if (info.reshape_active) { |
817 | int err = 0; | |
818 | int *fdlist = malloc(sizeof(int)* bestcnt); | |
819 | for (i=0; i<bestcnt; i++) { | |
820 | int j = best[i]; | |
821 | if (j >= 0) { | |
822 | fdlist[i] = dev_open(devices[j].devname, O_RDWR|O_EXCL); | |
823 | if (fdlist[i] < 0) { | |
824 | fprintf(stderr, Name ": Could not open %s for write - cannot Assemble array.\n", | |
825 | devices[j].devname); | |
826 | err = 1; | |
827 | break; | |
828 | } | |
829 | } else | |
830 | fdlist[i] = -1; | |
831 | } | |
832 | if (!err) | |
06b0d786 | 833 | err = Grow_restart(st, &info, fdlist, bestcnt, backup_file); |
353632d9 NB |
834 | while (i>0) { |
835 | i--; | |
836 | if (fdlist[i]>=0) close(fdlist[i]); | |
837 | } | |
838 | if (err) { | |
839 | fprintf(stderr, Name ": Failed to restore critical section for reshape, sorry.\n"); | |
d55e3aef | 840 | if (must_close) close(mdfd); |
353632d9 NB |
841 | return err; |
842 | } | |
843 | } | |
39c5a909 | 844 | #endif |
aa88f531 NB |
845 | /* count number of in-sync devices according to the superblock. |
846 | * We must have this number to start the array without -s or -R | |
847 | */ | |
4b1ac34b | 848 | req_cnt = info.array.working_disks; |
aa88f531 | 849 | |
64c4757e NB |
850 | /* Almost ready to actually *do* something */ |
851 | if (!old_linux) { | |
fbf8a0b7 | 852 | int rv; |
a19c88b8 | 853 | |
f35f2525 | 854 | rv = set_array_info(mdfd, st, &info); |
fbf8a0b7 | 855 | if (rv) { |
f35f2525 | 856 | fprintf(stderr, Name ": failed to set array info for %s: %s\n", |
64c4757e | 857 | mddev, strerror(errno)); |
d55e3aef | 858 | if (must_close) close(mdfd); |
64c4757e NB |
859 | return 1; |
860 | } | |
11484a63 | 861 | if (ident->bitmap_fd >= 0) { |
c82f047c NB |
862 | if (ioctl(mdfd, SET_BITMAP_FILE, ident->bitmap_fd) != 0) { |
863 | fprintf(stderr, Name ": SET_BITMAP_FILE failed.\n"); | |
d55e3aef | 864 | if (must_close) close(mdfd); |
c82f047c NB |
865 | return 1; |
866 | } | |
7ef02d01 NB |
867 | } else if (ident->bitmap_file) { |
868 | /* From config file */ | |
869 | int bmfd = open(ident->bitmap_file, O_RDWR); | |
870 | if (bmfd < 0) { | |
871 | fprintf(stderr, Name ": Could not open bitmap file %s\n", | |
872 | ident->bitmap_file); | |
d55e3aef | 873 | if (must_close) close(mdfd); |
7ef02d01 NB |
874 | return 1; |
875 | } | |
876 | if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) { | |
877 | fprintf(stderr, Name ": Failed to set bitmapfile for %s\n", mddev); | |
878 | close(bmfd); | |
d55e3aef | 879 | if (must_close) close(mdfd); |
7ef02d01 NB |
880 | return 1; |
881 | } | |
882 | close(bmfd); | |
c82f047c | 883 | } |
7ef02d01 | 884 | |
52826846 | 885 | /* First, add the raid disks, but add the chosen one last */ |
56eedc1a | 886 | for (i=0; i<= bestcnt; i++) { |
52826846 | 887 | int j; |
56eedc1a | 888 | if (i < bestcnt) { |
52826846 NB |
889 | j = best[i]; |
890 | if (j == chosen_drive) | |
891 | continue; | |
892 | } else | |
893 | j = chosen_drive; | |
894 | ||
56eedc1a | 895 | if (j >= 0 /* && devices[j].uptodate */) { |
f35f2525 | 896 | rv = add_disk(mdfd, st, &info, &devices[j].i); |
7801ac20 | 897 | |
a19c88b8 | 898 | if (rv) { |
213ee40b NB |
899 | fprintf(stderr, Name ": failed to add " |
900 | "%s to %s: %s\n", | |
64c4757e NB |
901 | devices[j].devname, |
902 | mddev, | |
903 | strerror(errno)); | |
213ee40b NB |
904 | if (i < info.array.raid_disks |
905 | || i == bestcnt) | |
52826846 NB |
906 | okcnt--; |
907 | else | |
908 | sparecnt--; | |
dab6685f | 909 | } else if (verbose > 0) |
213ee40b NB |
910 | fprintf(stderr, Name ": added %s " |
911 | "to %s as %d\n", | |
912 | devices[j].devname, mddev, | |
913 | devices[j].i.disk.raid_disk); | |
dab6685f | 914 | } else if (verbose > 0 && i < info.array.raid_disks) |
213ee40b NB |
915 | fprintf(stderr, Name ": no uptodate device for " |
916 | "slot %d of %s\n", | |
64c4757e NB |
917 | i, mddev); |
918 | } | |
aba69144 | 919 | |
598f0d58 NB |
920 | if (info.array.level == LEVEL_CONTAINER) { |
921 | if (verbose >= 0) { | |
922 | fprintf(stderr, Name ": Container %s has been " | |
923 | "assembled with %d drive%s", | |
924 | mddev, okcnt, okcnt==1?"":"s"); | |
925 | if (okcnt < info.array.raid_disks) | |
926 | fprintf(stderr, " (out of %d)", | |
927 | info.array.raid_disks); | |
928 | fprintf(stderr, "\n"); | |
929 | } | |
930 | if (must_close) | |
931 | close(mdfd); | |
932 | return 0; | |
933 | } | |
934 | ||
64c4757e | 935 | if (runstop == 1 || |
b8a8ccf9 | 936 | (runstop <= 0 && |
583315d9 NB |
937 | ( enough(info.array.level, info.array.raid_disks, |
938 | info.array.layout, clean, avail, okcnt) && | |
aa88f531 NB |
939 | (okcnt >= req_cnt || start_partial_ok) |
940 | ))) { | |
82b27616 | 941 | if (ioctl(mdfd, RUN_ARRAY, NULL)==0) { |
dab6685f NB |
942 | if (verbose >= 0) { |
943 | fprintf(stderr, Name ": %s has been started with %d drive%s", | |
944 | mddev, okcnt, okcnt==1?"":"s"); | |
b8a8ccf9 | 945 | if (okcnt < info.array.raid_disks) |
dab6685f NB |
946 | fprintf(stderr, " (out of %d)", info.array.raid_disks); |
947 | if (sparecnt) | |
948 | fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s"); | |
949 | fprintf(stderr, ".\n"); | |
950 | } | |
589395d6 NB |
951 | if (must_close) { |
952 | int usecs = 1; | |
953 | close(mdfd); | |
954 | /* There is a nasty race with 'mdadm --monitor'. | |
955 | * If it opens this device before we close it, | |
956 | * it gets an incomplete open on which IO | |
598f0d58 NB |
957 | * doesn't work and the capacity is |
958 | * wrong. | |
589395d6 NB |
959 | * If we reopen (to check for layered devices) |
960 | * before --monitor closes, we loose. | |
961 | * | |
962 | * So: wait upto 1 second for there to be | |
963 | * a non-zero capacity. | |
964 | */ | |
965 | while (usecs < 1000) { | |
966 | mdfd = open(mddev, O_RDONLY); | |
967 | if (mdfd >= 0) { | |
beae1dfe NB |
968 | unsigned long long size; |
969 | if (get_dev_size(mdfd, NULL, &size) && | |
589395d6 NB |
970 | size > 0) |
971 | break; | |
972 | close(mdfd); | |
973 | } | |
974 | usleep(usecs); | |
975 | usecs <<= 1; | |
976 | } | |
977 | } | |
64c4757e | 978 | return 0; |
82b27616 | 979 | } |
682c7051 | 980 | fprintf(stderr, Name ": failed to RUN_ARRAY %s: %s\n", |
64c4757e | 981 | mddev, strerror(errno)); |
583315d9 NB |
982 | |
983 | if (!enough(info.array.level, info.array.raid_disks, | |
984 | info.array.layout, 1, avail, okcnt)) | |
985 | fprintf(stderr, Name ": Not enough devices to " | |
986 | "start the array.\n"); | |
987 | else if (!enough(info.array.level, | |
988 | info.array.raid_disks, | |
989 | info.array.layout, clean, | |
990 | avail, okcnt)) | |
991 | fprintf(stderr, Name ": Not enough devices to " | |
992 | "start the array while not clean " | |
993 | "- consider --force.\n"); | |
994 | ||
1c203a4b NB |
995 | if (must_close) { |
996 | ioctl(mdfd, STOP_ARRAY, NULL); | |
997 | close(mdfd); | |
998 | } | |
64c4757e NB |
999 | return 1; |
1000 | } | |
82b27616 | 1001 | if (runstop == -1) { |
b8a8ccf9 | 1002 | fprintf(stderr, Name ": %s assembled from %d drive%s", |
52826846 | 1003 | mddev, okcnt, okcnt==1?"":"s"); |
b8a8ccf9 NB |
1004 | if (okcnt != info.array.raid_disks) |
1005 | fprintf(stderr, " (out of %d)", info.array.raid_disks); | |
1006 | fprintf(stderr, ", but not started.\n"); | |
d55e3aef | 1007 | if (must_close) close(mdfd); |
64c4757e | 1008 | return 0; |
82b27616 | 1009 | } |
4855f95c | 1010 | if (verbose >= -1) { |
dab6685f NB |
1011 | fprintf(stderr, Name ": %s assembled from %d drive%s", mddev, okcnt, okcnt==1?"":"s"); |
1012 | if (sparecnt) | |
1013 | fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s"); | |
583315d9 NB |
1014 | if (!enough(info.array.level, info.array.raid_disks, |
1015 | info.array.layout, 1, avail, okcnt)) | |
dab6685f | 1016 | fprintf(stderr, " - not enough to start the array.\n"); |
583315d9 NB |
1017 | else if (!enough(info.array.level, |
1018 | info.array.raid_disks, | |
1019 | info.array.layout, clean, | |
1020 | avail, okcnt)) | |
1021 | fprintf(stderr, " - not enough to start the " | |
1022 | "array while not clean - consider " | |
1023 | "--force.\n"); | |
dab6685f NB |
1024 | else { |
1025 | if (req_cnt == info.array.raid_disks) | |
1026 | fprintf(stderr, " - need all %d to start it", req_cnt); | |
1027 | else | |
1028 | fprintf(stderr, " - need %d of %d to start", req_cnt, info.array.raid_disks); | |
1029 | fprintf(stderr, " (use --run to insist).\n"); | |
1030 | } | |
aa88f531 | 1031 | } |
1c203a4b NB |
1032 | if (must_close) { |
1033 | ioctl(mdfd, STOP_ARRAY, NULL); | |
1034 | close(mdfd); | |
1035 | } | |
64c4757e | 1036 | return 1; |
82b27616 | 1037 | } else { |
52826846 NB |
1038 | /* The "chosen_drive" is a good choice, and if necessary, the superblock has |
1039 | * been updated to point to the current locations of devices. | |
1040 | * so we can just start the array | |
82b27616 | 1041 | */ |
cd29a5c8 | 1042 | unsigned long dev; |
213ee40b NB |
1043 | dev = makedev(devices[chosen_drive].i.disk.major, |
1044 | devices[chosen_drive].i.disk.minor); | |
82b27616 NB |
1045 | if (ioctl(mdfd, START_ARRAY, dev)) { |
1046 | fprintf(stderr, Name ": Cannot start array: %s\n", | |
1047 | strerror(errno)); | |
1048 | } | |
aba69144 | 1049 | |
64c4757e | 1050 | } |
d55e3aef | 1051 | if (must_close) close(mdfd); |
e0d19036 | 1052 | return 0; |
64c4757e | 1053 | } |