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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 | * |
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 | ||
7f91af49 | 53 | int Assemble(struct supertype *st, char *mddev, |
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 | */ | |
c30e5369 N |
114 | int mdfd; |
115 | int clean; | |
7f91af49 | 116 | int auto_assem = (mddev == NULL); |
64c4757e | 117 | int old_linux = 0; |
c30e5369 | 118 | int vers = vers; /* Keep gcc quite - it really is initialised */ |
64c4757e NB |
119 | struct { |
120 | char *devname; | |
213ee40b NB |
121 | int uptodate; /* set once we decide that this device is as |
122 | * recent as everything else in the array. | |
123 | */ | |
124 | struct mdinfo i; | |
5787fa49 | 125 | } *devices; |
56eedc1a | 126 | int *best = NULL; /* indexed by raid_disk */ |
98c6faba NB |
127 | unsigned int bestcnt = 0; |
128 | int devcnt = 0; | |
129 | unsigned int okcnt, sparecnt; | |
130 | unsigned int req_cnt; | |
131 | unsigned int i; | |
64c4757e | 132 | int most_recent = 0; |
cd29a5c8 | 133 | int chosen_drive; |
52826846 | 134 | int change = 0; |
cd29a5c8 | 135 | int inargv = 0; |
bf4fb153 | 136 | int bitmap_done; |
7f91af49 N |
137 | int start_partial_ok = (runstop >= 0) && |
138 | (force || devlist==NULL || auto_assem); | |
98c6faba | 139 | unsigned int num_devs; |
5787fa49 | 140 | mddev_dev_t tmpdev; |
4b1ac34b | 141 | struct mdinfo info; |
c30e5369 | 142 | mdu_array_info_t tmp_inf; |
265e0f17 | 143 | char *avail; |
308e1801 | 144 | int nextspare = 0; |
69207ff6 N |
145 | char *name; |
146 | int trustworthy; | |
a04d5763 | 147 | char chosen_name[1024]; |
8a46fe84 | 148 | |
f35f2525 N |
149 | memset(&info, 0, sizeof(info)); |
150 | ||
682c7051 | 151 | if (get_linux_version() < 2004000) |
64c4757e NB |
152 | old_linux = 1; |
153 | ||
64c4757e | 154 | /* |
52826846 NB |
155 | * If any subdevs are listed, then any that don't |
156 | * match ident are discarded. Remainder must all match and | |
157 | * become the array. | |
158 | * If no subdevs, then we scan all devices in the config file, but | |
159 | * there must be something in the identity | |
64c4757e | 160 | */ |
64c4757e | 161 | |
cd29a5c8 | 162 | if (!devlist && |
52826846 NB |
163 | ident->uuid_set == 0 && |
164 | ident->super_minor < 0 && | |
165 | ident->devices == NULL) { | |
166 | fprintf(stderr, Name ": No identity information available for %s - cannot assemble.\n", | |
8a46fe84 | 167 | mddev ? mddev : "further assembly"); |
52826846 | 168 | return 1; |
64c4757e | 169 | } |
71d60c48 DW |
170 | |
171 | /* if the configuration specifies a container then we use that to | |
172 | * determine the devices and retrieve the array configuration | |
173 | */ | |
174 | #ifndef MDASSEMBLE | |
175 | if (ident->container && ident->member) { | |
176 | int cfd = open(ident->container, O_RDWR); | |
177 | struct mdinfo *mdi; | |
178 | struct supertype container; | |
179 | ||
180 | if (verbose>0) | |
181 | fprintf(stderr, Name ": looking to assemble member array %s" | |
182 | " inside container %s\n", ident->member, ident->container); | |
183 | if (cfd < 0) { | |
184 | if (verbose>0) | |
185 | fprintf(stderr, Name ": unable to open container %s: %s\n", | |
186 | ident->container, strerror(errno)); | |
187 | return 1; | |
188 | } | |
189 | ||
190 | mdi = sysfs_read(cfd, fd2devnum(cfd), GET_VERSION); | |
191 | if (!mdi) { | |
192 | close(cfd); | |
193 | if (verbose>0) | |
194 | fprintf(stderr, Name ": unable to read container %s\n", | |
195 | ident->container); | |
196 | return 1; | |
197 | } | |
198 | container.ss = find_metadata_methods(mdi->text_version); | |
199 | sysfs_free(mdi); | |
200 | if (!container.ss) { | |
201 | close(cfd); | |
202 | fprintf(stderr, Name ": %s uses unknown metadata: %s\n", | |
203 | ident->container, mdi->text_version); | |
204 | return 1; | |
205 | } | |
206 | if (container.ss->load_super(&container, cfd, ident->container)) { | |
207 | fprintf(stderr, Name ": Cannot load metadata for container %s\n", | |
208 | ident->container); | |
209 | return 1; | |
210 | } | |
211 | ||
212 | return Incremental_container(&container, ident->container, | |
215bb3f7 N |
213 | verbose, runstop, ident->autof, |
214 | LOCAL); | |
71d60c48 DW |
215 | } |
216 | #endif | |
cd29a5c8 | 217 | if (devlist == NULL) |
8aec876d | 218 | devlist = conf_get_devs(); |
7f91af49 | 219 | else if (mddev) |
da6b5ca9 | 220 | inargv = 1; |
64c4757e | 221 | |
60e1bc1a | 222 | try_again: |
c30e5369 N |
223 | /* We come back here when doing auto-assembly and attempting some |
224 | * set of devices failed. Those are now marked as ->used==2 and | |
225 | * we ignore them and try again | |
226 | */ | |
60e1bc1a | 227 | |
5787fa49 NB |
228 | tmpdev = devlist; num_devs = 0; |
229 | while (tmpdev) { | |
da6b5ca9 NB |
230 | if (tmpdev->used) |
231 | tmpdev->used = 2; | |
232 | else | |
233 | num_devs++; | |
5787fa49 NB |
234 | tmpdev = tmpdev->next; |
235 | } | |
5787fa49 NB |
236 | devices = malloc(num_devs * sizeof(*devices)); |
237 | ||
82d9eba6 | 238 | if (!st && ident->st) st = ident->st; |
64c4757e | 239 | |
dab6685f | 240 | if (verbose>0) |
82b27616 | 241 | fprintf(stderr, Name ": looking for devices for %s\n", |
8a46fe84 | 242 | mddev ? mddev : "further assembly"); |
82b27616 | 243 | |
811e6cbe NB |
244 | /* first walk the list of devices to find a consistent set |
245 | * that match the criterea, if that is possible. | |
c30e5369 | 246 | * We flag the ones we like with 'used'. |
811e6cbe NB |
247 | */ |
248 | for (tmpdev = devlist; | |
249 | tmpdev; | |
250 | tmpdev = tmpdev->next) { | |
251 | char *devname = tmpdev->devname; | |
64c4757e NB |
252 | int dfd; |
253 | struct stat stb; | |
3da92f27 | 254 | struct supertype *tst = dup_super(st); |
52826846 | 255 | |
da6b5ca9 NB |
256 | if (tmpdev->used > 1) continue; |
257 | ||
52826846 | 258 | if (ident->devices && |
56eedc1a | 259 | !match_oneof(ident->devices, devname)) { |
6a41304b | 260 | if ((inargv && verbose>=0) || verbose > 0) |
56eedc1a | 261 | fprintf(stderr, Name ": %s is not one of %s\n", devname, ident->devices); |
52826846 | 262 | continue; |
56eedc1a | 263 | } |
4b1ac34b | 264 | |
8b0dabea | 265 | dfd = dev_open(devname, O_RDONLY|O_EXCL); |
64c4757e | 266 | if (dfd < 0) { |
6a41304b | 267 | if ((inargv && verbose >= 0) || verbose > 0) |
682c7051 | 268 | fprintf(stderr, Name ": cannot open device %s: %s\n", |
64c4757e | 269 | devname, strerror(errno)); |
da6b5ca9 | 270 | tmpdev->used = 2; |
52826846 NB |
271 | } else if (fstat(dfd, &stb)< 0) { |
272 | /* Impossible! */ | |
273 | fprintf(stderr, Name ": fstat failed for %s: %s\n", | |
274 | devname, strerror(errno)); | |
da6b5ca9 | 275 | tmpdev->used = 2; |
cd29a5c8 NB |
276 | } else if ((stb.st_mode & S_IFMT) != S_IFBLK) { |
277 | fprintf(stderr, Name ": %s is not a block device.\n", | |
52826846 | 278 | devname); |
da6b5ca9 | 279 | tmpdev->used = 2; |
82d9eba6 | 280 | } else if (!tst && (tst = guess_super(dfd)) == NULL) { |
6a41304b | 281 | if ((inargv && verbose >= 0) || verbose > 0) |
da6b5ca9 NB |
282 | fprintf(stderr, Name ": no recogniseable superblock on %s\n", |
283 | devname); | |
284 | tmpdev->used = 2; | |
3da92f27 | 285 | } else if (tst->ss->load_super(tst,dfd, NULL)) { |
6a41304b | 286 | if ((inargv && verbose >= 0) || verbose > 0) |
682c7051 | 287 | fprintf( stderr, Name ": no RAID superblock on %s\n", |
64c4757e | 288 | devname); |
52826846 | 289 | } else { |
3da92f27 | 290 | tst->ss->getinfo_super(tst, &info); |
64c4757e | 291 | } |
c06487ce | 292 | if (dfd >= 0) close(dfd); |
52826846 | 293 | |
838acbc2 | 294 | if (ident->uuid_set && (!update || strcmp(update, "uuid")!= 0) && |
3da92f27 NB |
295 | (!tst || !tst->sb || |
296 | same_uuid(info.uuid, ident->uuid, tst->ss->swapuuid)==0)) { | |
6a41304b | 297 | if ((inargv && verbose >= 0) || verbose > 0) |
52826846 NB |
298 | fprintf(stderr, Name ": %s has wrong uuid.\n", |
299 | devname); | |
df37ffc0 | 300 | goto loop; |
82b27616 | 301 | } |
c4f12c13 | 302 | if (ident->name[0] && (!update || strcmp(update, "name")!= 0) && |
3da92f27 NB |
303 | (!tst || !tst->sb || |
304 | name_matches(info.name, ident->name, homehost)==0)) { | |
6a41304b | 305 | if ((inargv && verbose >= 0) || verbose > 0) |
947fd4dd NB |
306 | fprintf(stderr, Name ": %s has wrong name.\n", |
307 | devname); | |
df37ffc0 | 308 | goto loop; |
947fd4dd | 309 | } |
98c6faba | 310 | if (ident->super_minor != UnSet && |
3da92f27 NB |
311 | (!tst || !tst->sb || |
312 | ident->super_minor != info.array.md_minor)) { | |
6a41304b | 313 | if ((inargv && verbose >= 0) || verbose > 0) |
52826846 | 314 | fprintf(stderr, Name ": %s has wrong super-minor.\n", |
64c4757e | 315 | devname); |
df37ffc0 | 316 | goto loop; |
64c4757e | 317 | } |
98c6faba | 318 | if (ident->level != UnSet && |
3da92f27 NB |
319 | (!tst || !tst->sb || |
320 | ident->level != info.array.level)) { | |
6a41304b | 321 | if ((inargv && verbose >= 0) || verbose > 0) |
cd29a5c8 NB |
322 | fprintf(stderr, Name ": %s has wrong raid level.\n", |
323 | devname); | |
df37ffc0 | 324 | goto loop; |
cd29a5c8 | 325 | } |
98c6faba | 326 | if (ident->raid_disks != UnSet && |
3da92f27 NB |
327 | (!tst || !tst->sb || |
328 | ident->raid_disks!= info.array.raid_disks)) { | |
6a41304b | 329 | if ((inargv && verbose >= 0) || verbose > 0) |
cd29a5c8 NB |
330 | fprintf(stderr, Name ": %s requires wrong number of drives.\n", |
331 | devname); | |
df37ffc0 | 332 | goto loop; |
cd29a5c8 | 333 | } |
c30e5369 | 334 | if (auto_assem) { |
3da92f27 | 335 | if (tst == NULL || tst->sb == NULL) |
da6b5ca9 | 336 | continue; |
da6b5ca9 | 337 | } |
83b6208e | 338 | /* If we are this far, then we are nearly commited to this device. |
52826846 | 339 | * If the super_block doesn't exist, or doesn't match others, |
83b6208e NB |
340 | * then we probably cannot continue |
341 | * However if one of the arrays is for the homehost, and | |
342 | * the other isn't that can disambiguate. | |
52826846 | 343 | */ |
52826846 | 344 | |
3da92f27 | 345 | if (!tst || !tst->sb) { |
52826846 NB |
346 | fprintf(stderr, Name ": %s has no superblock - assembly aborted\n", |
347 | devname); | |
ddd1a492 NB |
348 | if (st) |
349 | st->ss->free_super(st); | |
52826846 NB |
350 | return 1; |
351 | } | |
838acbc2 | 352 | |
83b6208e | 353 | if (st == NULL) |
3da92f27 NB |
354 | st = dup_super(tst); |
355 | if (st->minor_version == -1) | |
356 | st->minor_version = tst->minor_version; | |
83b6208e NB |
357 | if (st->ss != tst->ss || |
358 | st->minor_version != tst->minor_version || | |
64557c33 | 359 | st->ss->compare_super(st, tst) != 0) { |
83b6208e | 360 | /* Some mismatch. If exactly one array matches this host, |
da6b5ca9 NB |
361 | * we can resolve on that one. |
362 | * Or, if we are auto assembling, we just ignore the second | |
363 | * for now. | |
83b6208e | 364 | */ |
c30e5369 | 365 | if (auto_assem) |
df37ffc0 | 366 | goto loop; |
83b6208e | 367 | if (homehost) { |
3da92f27 NB |
368 | int first = st->ss->match_home(st, homehost); |
369 | int last = tst->ss->match_home(tst, homehost); | |
9362c1c8 N |
370 | if (first != last && |
371 | (first == 1 || last == 1)) { | |
83b6208e NB |
372 | /* We can do something */ |
373 | if (first) {/* just ignore this one */ | |
374 | if ((inargv && verbose >= 0) || verbose > 0) | |
375 | fprintf(stderr, Name ": %s misses out due to wrong homehost\n", | |
376 | devname); | |
df37ffc0 | 377 | goto loop; |
83b6208e NB |
378 | } else { /* reject all those sofar */ |
379 | mddev_dev_t td; | |
380 | if ((inargv && verbose >= 0) || verbose > 0) | |
381 | fprintf(stderr, Name ": %s overrides previous devices due to good homehost\n", | |
382 | devname); | |
383 | for (td=devlist; td != tmpdev; td=td->next) | |
384 | if (td->used == 1) | |
385 | td->used = 0; | |
386 | tmpdev->used = 1; | |
df37ffc0 | 387 | goto loop; |
83b6208e NB |
388 | } |
389 | } | |
390 | } | |
52826846 NB |
391 | fprintf(stderr, Name ": superblock on %s doesn't match others - assembly aborted\n", |
392 | devname); | |
3da92f27 NB |
393 | tst->ss->free_super(tst); |
394 | st->ss->free_super(st); | |
52826846 | 395 | return 1; |
64c4757e NB |
396 | } |
397 | ||
811e6cbe | 398 | tmpdev->used = 1; |
df37ffc0 NB |
399 | |
400 | loop: | |
3d2b16e7 NB |
401 | if (tst) |
402 | tst->ss->free_super(tst); | |
811e6cbe NB |
403 | } |
404 | ||
c30e5369 N |
405 | if (!st || !st->sb) |
406 | return 2; | |
407 | ||
69207ff6 N |
408 | /* Now need to open array the device. Use create_mddev */ |
409 | st->ss->getinfo_super(st, &info); | |
3d2c4fc7 | 410 | |
69207ff6 N |
411 | trustworthy = FOREIGN; |
412 | switch (st->ss->match_home(st, homehost)) { | |
413 | case 0: | |
414 | trustworthy = FOREIGN; | |
415 | name = info.name; | |
416 | break; | |
417 | case 1: | |
418 | trustworthy = LOCAL; | |
419 | name = strchr(info.name, ':'); | |
420 | if (name) | |
421 | name++; | |
3d2c4fc7 | 422 | else |
69207ff6 N |
423 | name = info.name; |
424 | break; | |
425 | case -1: | |
a4bc1720 | 426 | trustworthy = FOREIGN; |
69207ff6 | 427 | break; |
c30e5369 | 428 | } |
ac2ecf55 N |
429 | if (!auto_assem && trustworthy == FOREIGN) |
430 | /* If the array is listed in mdadm or on | |
431 | * command line, then we trust the name | |
432 | * even if the array doesn't look local | |
433 | */ | |
434 | trustworthy = LOCAL; | |
435 | ||
a4bc1720 N |
436 | if (info.name[0] == 0 && |
437 | info.array.level == LEVEL_CONTAINER) { | |
438 | name = info.text_version; | |
439 | trustworthy = METADATA; | |
440 | } | |
a04d5763 N |
441 | mdfd = create_mddev(mddev, name, ident->autof, trustworthy, |
442 | chosen_name); | |
c30e5369 N |
443 | if (mdfd < 0) { |
444 | st->ss->free_super(st); | |
445 | free(devices); | |
446 | if (auto_assem) | |
60e1bc1a | 447 | goto try_again; |
c30e5369 N |
448 | return 1; |
449 | } | |
a04d5763 | 450 | mddev = chosen_name; |
c30e5369 N |
451 | vers = md_get_version(mdfd); |
452 | if (vers < 9000) { | |
453 | fprintf(stderr, Name ": Assemble requires driver version 0.90.0 or later.\n" | |
454 | " Upgrade your kernel or try --build\n"); | |
455 | close(mdfd); | |
456 | return 1; | |
457 | } | |
458 | if (ioctl(mdfd, GET_ARRAY_INFO, &tmp_inf)==0) { | |
459 | fprintf(stderr, Name ": %s already active, cannot restart it!\n", | |
460 | mddev); | |
461 | for (tmpdev = devlist ; | |
462 | tmpdev && tmpdev->used != 1; | |
463 | tmpdev = tmpdev->next) | |
464 | ; | |
465 | if (tmpdev && auto_assem) | |
466 | fprintf(stderr, Name ": %s needed for %s...\n", | |
467 | mddev, tmpdev->devname); | |
468 | close(mdfd); | |
469 | mdfd = -3; | |
470 | st->ss->free_super(st); | |
471 | free(devices); | |
472 | if (auto_assem) | |
473 | goto try_again; | |
474 | return 1; | |
8a46fe84 | 475 | } |
c30e5369 | 476 | ioctl(mdfd, STOP_ARRAY, NULL); /* just incase it was started but has no content */ |
8a46fe84 | 477 | |
811e6cbe | 478 | /* Ok, no bad inconsistancy, we can try updating etc */ |
bf4fb153 | 479 | bitmap_done = 0; |
da6b5ca9 | 480 | for (tmpdev = devlist; tmpdev; tmpdev=tmpdev->next) if (tmpdev->used == 1) { |
811e6cbe NB |
481 | char *devname = tmpdev->devname; |
482 | struct stat stb; | |
5787fa49 | 483 | /* looks like a good enough match to update the super block if needed */ |
d1f1011b | 484 | #ifndef MDASSEMBLE |
5787fa49 | 485 | if (update) { |
811e6cbe | 486 | int dfd; |
4b1ac34b NB |
487 | /* prepare useful information in info structures */ |
488 | struct stat stb2; | |
3da92f27 | 489 | struct supertype *tst; |
4b1ac34b | 490 | fstat(mdfd, &stb2); |
7d99579f NB |
491 | |
492 | if (strcmp(update, "uuid")==0 && | |
493 | !ident->uuid_set) { | |
494 | int rfd; | |
495 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || | |
496 | read(rfd, ident->uuid, 16) != 16) { | |
497 | *(__u32*)(ident->uuid) = random(); | |
498 | *(__u32*)(ident->uuid+1) = random(); | |
499 | *(__u32*)(ident->uuid+2) = random(); | |
500 | *(__u32*)(ident->uuid+3) = random(); | |
501 | } | |
502 | if (rfd >= 0) close(rfd); | |
7d99579f | 503 | } |
811e6cbe NB |
504 | dfd = dev_open(devname, O_RDWR|O_EXCL); |
505 | ||
0430ed48 NB |
506 | remove_partitions(dfd); |
507 | ||
3da92f27 NB |
508 | tst = dup_super(st); |
509 | tst->ss->load_super(tst, dfd, NULL); | |
510 | tst->ss->getinfo_super(tst, &info); | |
811e6cbe | 511 | |
7d99579f | 512 | memcpy(info.uuid, ident->uuid, 16); |
e5eac01f | 513 | strcpy(info.name, ident->name); |
811e6cbe NB |
514 | info.array.md_minor = minor(stb2.st_rdev); |
515 | ||
3da92f27 NB |
516 | tst->ss->update_super(tst, &info, update, |
517 | devname, verbose, | |
518 | ident->uuid_set, homehost); | |
e5eac01f NB |
519 | if (strcmp(update, "uuid")==0 && |
520 | !ident->uuid_set) { | |
521 | ident->uuid_set = 1; | |
522 | memcpy(ident->uuid, info.uuid, 16); | |
523 | } | |
b8a8ccf9 | 524 | if (dfd < 0) |
5787fa49 NB |
525 | fprintf(stderr, Name ": Cannot open %s for superblock update\n", |
526 | devname); | |
3da92f27 | 527 | else if (tst->ss->store_super(tst, dfd)) |
5787fa49 NB |
528 | fprintf(stderr, Name ": Could not re-write superblock on %s.\n", |
529 | devname); | |
530 | if (dfd >= 0) | |
531 | close(dfd); | |
8131b493 NB |
532 | |
533 | if (strcmp(update, "uuid")==0 && | |
bf4fb153 | 534 | ident->bitmap_fd >= 0 && !bitmap_done) { |
3da92f27 NB |
535 | if (bitmap_update_uuid(ident->bitmap_fd, |
536 | info.uuid, | |
537 | tst->ss->swapuuid) != 0) | |
bf4fb153 NB |
538 | fprintf(stderr, Name ": Could not update uuid on external bitmap.\n"); |
539 | else | |
540 | bitmap_done = 1; | |
541 | } | |
3da92f27 | 542 | tst->ss->free_super(tst); |
d1f1011b NB |
543 | } else |
544 | #endif | |
545 | { | |
30e1b9a5 | 546 | struct supertype *tst = dup_super(st); |
da6b5ca9 NB |
547 | int dfd; |
548 | dfd = dev_open(devname, O_RDWR|O_EXCL); | |
549 | ||
0430ed48 NB |
550 | remove_partitions(dfd); |
551 | ||
3da92f27 NB |
552 | tst->ss->load_super(tst, dfd, NULL); |
553 | tst->ss->getinfo_super(tst, &info); | |
554 | tst->ss->free_super(tst); | |
da6b5ca9 | 555 | close(dfd); |
5787fa49 NB |
556 | } |
557 | ||
811e6cbe NB |
558 | stat(devname, &stb); |
559 | ||
dab6685f | 560 | if (verbose > 0) |
cd29a5c8 | 561 | fprintf(stderr, Name ": %s is identified as a member of %s, slot %d.\n", |
4b1ac34b | 562 | devname, mddev, info.disk.raid_disk); |
64c4757e | 563 | devices[devcnt].devname = devname; |
64c4757e | 564 | devices[devcnt].uptodate = 0; |
213ee40b NB |
565 | devices[devcnt].i = info; |
566 | devices[devcnt].i.disk.major = major(stb.st_rdev); | |
567 | devices[devcnt].i.disk.minor = minor(stb.st_rdev); | |
64c4757e | 568 | if (most_recent < devcnt) { |
213ee40b NB |
569 | if (devices[devcnt].i.events |
570 | > devices[most_recent].i.events) | |
64c4757e NB |
571 | most_recent = devcnt; |
572 | } | |
b8a8ccf9 | 573 | if (info.array.level == -4) |
5787fa49 NB |
574 | /* with multipath, the raid_disk from the superblock is meaningless */ |
575 | i = devcnt; | |
576 | else | |
213ee40b | 577 | i = devices[devcnt].i.disk.raid_disk; |
308e1801 NB |
578 | if (i+1 == 0) { |
579 | if (nextspare < info.array.raid_disks) | |
580 | nextspare = info.array.raid_disks; | |
581 | i = nextspare++; | |
08110d41 NB |
582 | } else { |
583 | if (i >= info.array.raid_disks && | |
584 | i >= nextspare) | |
585 | nextspare = i+1; | |
308e1801 | 586 | } |
98c6faba | 587 | if (i < 10000) { |
56eedc1a | 588 | if (i >= bestcnt) { |
98c6faba | 589 | unsigned int newbestcnt = i+10; |
56eedc1a | 590 | int *newbest = malloc(sizeof(int)*newbestcnt); |
98c6faba | 591 | unsigned int c; |
56eedc1a NB |
592 | for (c=0; c < newbestcnt; c++) |
593 | if (c < bestcnt) | |
594 | newbest[c] = best[c]; | |
595 | else | |
596 | newbest[c] = -1; | |
597 | if (best)free(best); | |
598 | best = newbest; | |
599 | bestcnt = newbestcnt; | |
600 | } | |
6a255b69 | 601 | if (best[i] >=0 && |
213ee40b NB |
602 | devices[best[i]].i.events |
603 | == devices[devcnt].i.events | |
604 | && (devices[best[i]].i.disk.minor | |
605 | != devices[devcnt].i.disk.minor) | |
b8ac1967 NB |
606 | && st->ss == &super0 |
607 | && info.array.level != LEVEL_MULTIPATH) { | |
6a255b69 NB |
608 | /* two different devices with identical superblock. |
609 | * Could be a mis-detection caused by overlapping | |
610 | * partitions. fail-safe. | |
611 | */ | |
612 | fprintf(stderr, Name ": WARNING %s and %s appear" | |
613 | " to have very similar superblocks.\n" | |
614 | " If they are really different, " | |
615 | "please --zero the superblock on one\n" | |
d2df86e0 NB |
616 | " If they are the same or overlap," |
617 | " please remove one from %s.\n", | |
618 | devices[best[i]].devname, devname, | |
619 | inargv ? "the list" : | |
620 | "the\n DEVICE list in mdadm.conf" | |
621 | ); | |
7f91af49 | 622 | close(mdfd); |
6a255b69 NB |
623 | return 1; |
624 | } | |
52826846 | 625 | if (best[i] == -1 |
213ee40b NB |
626 | || (devices[best[i]].i.events |
627 | < devices[devcnt].i.events)) | |
52826846 | 628 | best[i] = devcnt; |
56eedc1a | 629 | } |
64c4757e | 630 | devcnt++; |
df37ffc0 | 631 | } |
4b1ac34b | 632 | |
64c4757e | 633 | if (devcnt == 0) { |
682c7051 | 634 | fprintf(stderr, Name ": no devices found for %s\n", |
64c4757e | 635 | mddev); |
3d2b16e7 NB |
636 | if (st) |
637 | st->ss->free_super(st); | |
7f91af49 | 638 | close(mdfd); |
64c4757e NB |
639 | return 1; |
640 | } | |
4b1ac34b | 641 | |
3d2b16e7 NB |
642 | if (update && strcmp(update, "byteorder")==0) |
643 | st->minor_version = 90; | |
644 | ||
3da92f27 | 645 | st->ss->getinfo_super(st, &info); |
583315d9 | 646 | clean = info.array.state & 1; |
4b1ac34b | 647 | |
64c4757e NB |
648 | /* now we have some devices that might be suitable. |
649 | * I wonder how many | |
650 | */ | |
265e0f17 NB |
651 | avail = malloc(info.array.raid_disks); |
652 | memset(avail, 0, info.array.raid_disks); | |
64c4757e | 653 | okcnt = 0; |
52826846 | 654 | sparecnt=0; |
56eedc1a | 655 | for (i=0; i< bestcnt ;i++) { |
64c4757e | 656 | int j = best[i]; |
ee04451c NB |
657 | int event_margin = 1; /* always allow a difference of '1' |
658 | * like the kernel does | |
659 | */ | |
64c4757e | 660 | if (j < 0) continue; |
d013a55e NB |
661 | /* note: we ignore error flags in multipath arrays |
662 | * as they don't make sense | |
663 | */ | |
4b1ac34b | 664 | if (info.array.level != -4) |
213ee40b NB |
665 | if (!(devices[j].i.disk.state & (1<<MD_DISK_SYNC))) { |
666 | if (!(devices[j].i.disk.state | |
667 | & (1<<MD_DISK_FAULTY))) | |
aa88f531 | 668 | sparecnt++; |
d013a55e | 669 | continue; |
aa88f531 | 670 | } |
213ee40b NB |
671 | if (devices[j].i.events+event_margin >= |
672 | devices[most_recent].i.events) { | |
64c4757e | 673 | devices[j].uptodate = 1; |
265e0f17 | 674 | if (i < info.array.raid_disks) { |
52826846 | 675 | okcnt++; |
265e0f17 NB |
676 | avail[i]=1; |
677 | } else | |
52826846 | 678 | sparecnt++; |
64c4757e NB |
679 | } |
680 | } | |
265e0f17 | 681 | while (force && !enough(info.array.level, info.array.raid_disks, |
583315d9 | 682 | info.array.layout, 1, |
265e0f17 | 683 | avail, okcnt)) { |
64c4757e NB |
684 | /* Choose the newest best drive which is |
685 | * not up-to-date, update the superblock | |
686 | * and add it. | |
687 | */ | |
52826846 | 688 | int fd; |
3da92f27 | 689 | struct supertype *tst; |
c5a6f9a6 | 690 | long long current_events; |
cd29a5c8 | 691 | chosen_drive = -1; |
4b1ac34b | 692 | for (i=0; i<info.array.raid_disks && i < bestcnt; i++) { |
52826846 NB |
693 | int j = best[i]; |
694 | if (j>=0 && | |
695 | !devices[j].uptodate && | |
213ee40b | 696 | devices[j].i.events > 0 && |
52826846 | 697 | (chosen_drive < 0 || |
213ee40b NB |
698 | devices[j].i.events |
699 | > devices[chosen_drive].i.events)) | |
52826846 NB |
700 | chosen_drive = j; |
701 | } | |
702 | if (chosen_drive < 0) | |
703 | break; | |
213ee40b | 704 | current_events = devices[chosen_drive].i.events; |
c5a6f9a6 | 705 | add_another: |
dab6685f NB |
706 | if (verbose >= 0) |
707 | fprintf(stderr, Name ": forcing event count in %s(%d) from %d upto %d\n", | |
213ee40b NB |
708 | devices[chosen_drive].devname, |
709 | devices[chosen_drive].i.disk.raid_disk, | |
710 | (int)(devices[chosen_drive].i.events), | |
711 | (int)(devices[most_recent].i.events)); | |
8b0dabea | 712 | fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL); |
52826846 NB |
713 | if (fd < 0) { |
714 | fprintf(stderr, Name ": Couldn't open %s for write - not updating\n", | |
715 | devices[chosen_drive].devname); | |
213ee40b | 716 | devices[chosen_drive].i.events = 0; |
52826846 NB |
717 | continue; |
718 | } | |
3da92f27 | 719 | tst = dup_super(st); |
60b435db | 720 | if (tst->ss->load_super(tst,fd, NULL)) { |
52826846 NB |
721 | close(fd); |
722 | fprintf(stderr, Name ": RAID superblock disappeared from %s - not updating.\n", | |
723 | devices[chosen_drive].devname); | |
213ee40b | 724 | devices[chosen_drive].i.events = 0; |
52826846 NB |
725 | continue; |
726 | } | |
213ee40b | 727 | info.events = devices[most_recent].i.events; |
3da92f27 | 728 | tst->ss->update_super(tst, &info, "force-one", |
67a8c82d NB |
729 | devices[chosen_drive].devname, verbose, |
730 | 0, NULL); | |
4b1ac34b | 731 | |
3da92f27 | 732 | if (tst->ss->store_super(tst, fd)) { |
52826846 NB |
733 | close(fd); |
734 | fprintf(stderr, Name ": Could not re-write superblock on %s\n", | |
735 | devices[chosen_drive].devname); | |
213ee40b | 736 | devices[chosen_drive].i.events = 0; |
3da92f27 | 737 | tst->ss->free_super(tst); |
52826846 NB |
738 | continue; |
739 | } | |
740 | close(fd); | |
213ee40b | 741 | devices[chosen_drive].i.events = devices[most_recent].i.events; |
52826846 | 742 | devices[chosen_drive].uptodate = 1; |
265e0f17 | 743 | avail[chosen_drive] = 1; |
52826846 | 744 | okcnt++; |
3da92f27 | 745 | tst->ss->free_super(tst); |
c5a6f9a6 NB |
746 | |
747 | /* If there are any other drives of the same vintage, | |
748 | * add them in as well. We can't lose and we might gain | |
749 | */ | |
750 | for (i=0; i<info.array.raid_disks && i < bestcnt ; i++) { | |
751 | int j = best[i]; | |
752 | if (j >= 0 && | |
753 | !devices[j].uptodate && | |
213ee40b NB |
754 | devices[j].i.events > 0 && |
755 | devices[j].i.events == current_events) { | |
c5a6f9a6 NB |
756 | chosen_drive = j; |
757 | goto add_another; | |
758 | } | |
759 | } | |
64c4757e | 760 | } |
52826846 NB |
761 | |
762 | /* Now we want to look at the superblock which the kernel will base things on | |
763 | * and compare the devices that we think are working with the devices that the | |
764 | * superblock thinks are working. | |
765 | * If there are differences and --force is given, then update this chosen | |
766 | * superblock. | |
767 | */ | |
cd29a5c8 | 768 | chosen_drive = -1; |
3da92f27 | 769 | st->ss->free_super(st); |
56eedc1a | 770 | for (i=0; chosen_drive < 0 && i<bestcnt; i++) { |
52826846 NB |
771 | int j = best[i]; |
772 | int fd; | |
4b1ac34b | 773 | |
52826846 NB |
774 | if (j<0) |
775 | continue; | |
776 | if (!devices[j].uptodate) | |
777 | continue; | |
778 | chosen_drive = j; | |
8b0dabea | 779 | if ((fd=dev_open(devices[j].devname, O_RDONLY|O_EXCL))< 0) { |
52826846 NB |
780 | fprintf(stderr, Name ": Cannot open %s: %s\n", |
781 | devices[j].devname, strerror(errno)); | |
7f91af49 | 782 | close(mdfd); |
52826846 NB |
783 | return 1; |
784 | } | |
3da92f27 | 785 | if (st->ss->load_super(st,fd, NULL)) { |
52826846 NB |
786 | close(fd); |
787 | fprintf(stderr, Name ": RAID superblock has disappeared from %s\n", | |
788 | devices[j].devname); | |
7f91af49 | 789 | close(mdfd); |
52826846 NB |
790 | return 1; |
791 | } | |
792 | close(fd); | |
793 | } | |
3da92f27 | 794 | if (st->sb == NULL) { |
4b1ac34b | 795 | fprintf(stderr, Name ": No suitable drives found for %s\n", mddev); |
7f91af49 | 796 | close(mdfd); |
4b1ac34b NB |
797 | return 1; |
798 | } | |
3da92f27 | 799 | st->ss->getinfo_super(st, &info); |
f35f2525 N |
800 | #ifndef MDASSEMBLE |
801 | sysfs_init(&info, mdfd, 0); | |
802 | #endif | |
56eedc1a | 803 | for (i=0; i<bestcnt; i++) { |
52826846 | 804 | int j = best[i]; |
98c6faba | 805 | unsigned int desired_state; |
11a3e71d | 806 | |
4b1ac34b | 807 | if (i < info.array.raid_disks) |
11a3e71d NB |
808 | desired_state = (1<<MD_DISK_ACTIVE) | (1<<MD_DISK_SYNC); |
809 | else | |
810 | desired_state = 0; | |
811 | ||
52826846 NB |
812 | if (j<0) |
813 | continue; | |
814 | if (!devices[j].uptodate) | |
815 | continue; | |
4b1ac34b | 816 | |
213ee40b NB |
817 | devices[j].i.disk.state = desired_state; |
818 | ||
819 | if (st->ss->update_super(st, &devices[j].i, "assemble", NULL, | |
68c7d6d7 | 820 | verbose, 0, NULL)) { |
52826846 | 821 | if (force) { |
dab6685f NB |
822 | if (verbose >= 0) |
823 | fprintf(stderr, Name ": " | |
824 | "clearing FAULTY flag for device %d in %s for %s\n", | |
825 | j, mddev, devices[j].devname); | |
4b1ac34b | 826 | change = 1; |
52826846 | 827 | } else { |
dab6685f NB |
828 | if (verbose >= -1) |
829 | fprintf(stderr, Name ": " | |
830 | "device %d in %s has wrong state in superblock, but %s seems ok\n", | |
831 | i, mddev, devices[j].devname); | |
52826846 NB |
832 | } |
833 | } | |
4b1ac34b | 834 | #if 0 |
213ee40b | 835 | if (!(super.disks[i].i.disk.state & (1 << MD_DISK_FAULTY))) { |
52826846 NB |
836 | fprintf(stderr, Name ": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n", |
837 | i, mddev); | |
838 | } | |
4b1ac34b | 839 | #endif |
52826846 | 840 | } |
c5a6f9a6 NB |
841 | if (force && !clean && |
842 | !enough(info.array.level, info.array.raid_disks, | |
843 | info.array.layout, clean, | |
844 | avail, okcnt)) { | |
3da92f27 | 845 | change += st->ss->update_super(st, &info, "force-array", |
67a8c82d NB |
846 | devices[chosen_drive].devname, verbose, |
847 | 0, NULL); | |
583315d9 | 848 | clean = 1; |
d013a55e | 849 | } |
52826846 | 850 | |
4b1ac34b | 851 | if (change) { |
52826846 | 852 | int fd; |
8b0dabea | 853 | fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL); |
52826846 | 854 | if (fd < 0) { |
353632d9 | 855 | fprintf(stderr, Name ": Could not open %s for write - cannot Assemble array.\n", |
52826846 | 856 | devices[chosen_drive].devname); |
7f91af49 | 857 | close(mdfd); |
52826846 NB |
858 | return 1; |
859 | } | |
3da92f27 | 860 | if (st->ss->store_super(st, fd)) { |
52826846 NB |
861 | close(fd); |
862 | fprintf(stderr, Name ": Could not re-write superblock on %s\n", | |
863 | devices[chosen_drive].devname); | |
7f91af49 | 864 | close(mdfd); |
52826846 NB |
865 | return 1; |
866 | } | |
867 | close(fd); | |
52826846 NB |
868 | } |
869 | ||
353632d9 NB |
870 | /* If we are in the middle of a reshape we may need to restore saved data |
871 | * that was moved aside due to the reshape overwriting live data | |
872 | * The code of doing this lives in Grow.c | |
873 | */ | |
39c5a909 | 874 | #ifndef MDASSEMBLE |
353632d9 NB |
875 | if (info.reshape_active) { |
876 | int err = 0; | |
877 | int *fdlist = malloc(sizeof(int)* bestcnt); | |
878 | for (i=0; i<bestcnt; i++) { | |
879 | int j = best[i]; | |
880 | if (j >= 0) { | |
881 | fdlist[i] = dev_open(devices[j].devname, O_RDWR|O_EXCL); | |
882 | if (fdlist[i] < 0) { | |
883 | fprintf(stderr, Name ": Could not open %s for write - cannot Assemble array.\n", | |
884 | devices[j].devname); | |
885 | err = 1; | |
886 | break; | |
887 | } | |
888 | } else | |
889 | fdlist[i] = -1; | |
890 | } | |
891 | if (!err) | |
06b0d786 | 892 | err = Grow_restart(st, &info, fdlist, bestcnt, backup_file); |
353632d9 NB |
893 | while (i>0) { |
894 | i--; | |
895 | if (fdlist[i]>=0) close(fdlist[i]); | |
896 | } | |
897 | if (err) { | |
898 | fprintf(stderr, Name ": Failed to restore critical section for reshape, sorry.\n"); | |
7f91af49 | 899 | close(mdfd); |
353632d9 NB |
900 | return err; |
901 | } | |
902 | } | |
39c5a909 | 903 | #endif |
aa88f531 NB |
904 | /* count number of in-sync devices according to the superblock. |
905 | * We must have this number to start the array without -s or -R | |
906 | */ | |
4b1ac34b | 907 | req_cnt = info.array.working_disks; |
aa88f531 | 908 | |
64c4757e NB |
909 | /* Almost ready to actually *do* something */ |
910 | if (!old_linux) { | |
fbf8a0b7 | 911 | int rv; |
a19c88b8 | 912 | |
a04d5763 N |
913 | /* First, fill in the map, so that udev can find our name |
914 | * as soon as we become active. | |
915 | */ | |
916 | map_update(NULL, fd2devnum(mdfd), info.text_version, | |
917 | info.uuid, chosen_name); | |
918 | ||
f35f2525 | 919 | rv = set_array_info(mdfd, st, &info); |
fbf8a0b7 | 920 | if (rv) { |
f35f2525 | 921 | fprintf(stderr, Name ": failed to set array info for %s: %s\n", |
64c4757e | 922 | mddev, strerror(errno)); |
7f91af49 | 923 | close(mdfd); |
64c4757e NB |
924 | return 1; |
925 | } | |
11484a63 | 926 | if (ident->bitmap_fd >= 0) { |
c82f047c NB |
927 | if (ioctl(mdfd, SET_BITMAP_FILE, ident->bitmap_fd) != 0) { |
928 | fprintf(stderr, Name ": SET_BITMAP_FILE failed.\n"); | |
7f91af49 | 929 | close(mdfd); |
c82f047c NB |
930 | return 1; |
931 | } | |
7ef02d01 NB |
932 | } else if (ident->bitmap_file) { |
933 | /* From config file */ | |
934 | int bmfd = open(ident->bitmap_file, O_RDWR); | |
935 | if (bmfd < 0) { | |
936 | fprintf(stderr, Name ": Could not open bitmap file %s\n", | |
937 | ident->bitmap_file); | |
7f91af49 | 938 | close(mdfd); |
7ef02d01 NB |
939 | return 1; |
940 | } | |
941 | if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) { | |
942 | fprintf(stderr, Name ": Failed to set bitmapfile for %s\n", mddev); | |
943 | close(bmfd); | |
7f91af49 | 944 | close(mdfd); |
7ef02d01 NB |
945 | return 1; |
946 | } | |
947 | close(bmfd); | |
c82f047c | 948 | } |
7ef02d01 | 949 | |
52826846 | 950 | /* First, add the raid disks, but add the chosen one last */ |
56eedc1a | 951 | for (i=0; i<= bestcnt; i++) { |
52826846 | 952 | int j; |
56eedc1a | 953 | if (i < bestcnt) { |
52826846 NB |
954 | j = best[i]; |
955 | if (j == chosen_drive) | |
956 | continue; | |
957 | } else | |
958 | j = chosen_drive; | |
959 | ||
56eedc1a | 960 | if (j >= 0 /* && devices[j].uptodate */) { |
f35f2525 | 961 | rv = add_disk(mdfd, st, &info, &devices[j].i); |
7801ac20 | 962 | |
a19c88b8 | 963 | if (rv) { |
213ee40b NB |
964 | fprintf(stderr, Name ": failed to add " |
965 | "%s to %s: %s\n", | |
64c4757e NB |
966 | devices[j].devname, |
967 | mddev, | |
968 | strerror(errno)); | |
213ee40b NB |
969 | if (i < info.array.raid_disks |
970 | || i == bestcnt) | |
52826846 NB |
971 | okcnt--; |
972 | else | |
973 | sparecnt--; | |
dab6685f | 974 | } else if (verbose > 0) |
213ee40b NB |
975 | fprintf(stderr, Name ": added %s " |
976 | "to %s as %d\n", | |
977 | devices[j].devname, mddev, | |
978 | devices[j].i.disk.raid_disk); | |
dab6685f | 979 | } else if (verbose > 0 && i < info.array.raid_disks) |
213ee40b NB |
980 | fprintf(stderr, Name ": no uptodate device for " |
981 | "slot %d of %s\n", | |
64c4757e NB |
982 | i, mddev); |
983 | } | |
aba69144 | 984 | |
598f0d58 NB |
985 | if (info.array.level == LEVEL_CONTAINER) { |
986 | if (verbose >= 0) { | |
987 | fprintf(stderr, Name ": Container %s has been " | |
988 | "assembled with %d drive%s", | |
57ed8c91 | 989 | mddev, okcnt+sparecnt, okcnt+sparecnt==1?"":"s"); |
598f0d58 NB |
990 | if (okcnt < info.array.raid_disks) |
991 | fprintf(stderr, " (out of %d)", | |
992 | info.array.raid_disks); | |
993 | fprintf(stderr, "\n"); | |
994 | } | |
97590376 | 995 | sysfs_uevent(&info, "change"); |
7f91af49 | 996 | close(mdfd); |
598f0d58 NB |
997 | return 0; |
998 | } | |
999 | ||
64c4757e | 1000 | if (runstop == 1 || |
b8a8ccf9 | 1001 | (runstop <= 0 && |
583315d9 NB |
1002 | ( enough(info.array.level, info.array.raid_disks, |
1003 | info.array.layout, clean, avail, okcnt) && | |
aa88f531 NB |
1004 | (okcnt >= req_cnt || start_partial_ok) |
1005 | ))) { | |
82b27616 | 1006 | if (ioctl(mdfd, RUN_ARRAY, NULL)==0) { |
dab6685f NB |
1007 | if (verbose >= 0) { |
1008 | fprintf(stderr, Name ": %s has been started with %d drive%s", | |
1009 | mddev, okcnt, okcnt==1?"":"s"); | |
b8a8ccf9 | 1010 | if (okcnt < info.array.raid_disks) |
dab6685f NB |
1011 | fprintf(stderr, " (out of %d)", info.array.raid_disks); |
1012 | if (sparecnt) | |
1013 | fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s"); | |
1014 | fprintf(stderr, ".\n"); | |
1015 | } | |
7f91af49 N |
1016 | close(mdfd); |
1017 | if (auto_assem) { | |
589395d6 | 1018 | int usecs = 1; |
589395d6 NB |
1019 | /* There is a nasty race with 'mdadm --monitor'. |
1020 | * If it opens this device before we close it, | |
1021 | * it gets an incomplete open on which IO | |
598f0d58 NB |
1022 | * doesn't work and the capacity is |
1023 | * wrong. | |
589395d6 NB |
1024 | * If we reopen (to check for layered devices) |
1025 | * before --monitor closes, we loose. | |
1026 | * | |
1027 | * So: wait upto 1 second for there to be | |
1028 | * a non-zero capacity. | |
1029 | */ | |
1030 | while (usecs < 1000) { | |
1031 | mdfd = open(mddev, O_RDONLY); | |
1032 | if (mdfd >= 0) { | |
beae1dfe NB |
1033 | unsigned long long size; |
1034 | if (get_dev_size(mdfd, NULL, &size) && | |
589395d6 NB |
1035 | size > 0) |
1036 | break; | |
1037 | close(mdfd); | |
1038 | } | |
1039 | usleep(usecs); | |
1040 | usecs <<= 1; | |
1041 | } | |
1042 | } | |
64c4757e | 1043 | return 0; |
82b27616 | 1044 | } |
682c7051 | 1045 | fprintf(stderr, Name ": failed to RUN_ARRAY %s: %s\n", |
64c4757e | 1046 | mddev, strerror(errno)); |
583315d9 NB |
1047 | |
1048 | if (!enough(info.array.level, info.array.raid_disks, | |
1049 | info.array.layout, 1, avail, okcnt)) | |
1050 | fprintf(stderr, Name ": Not enough devices to " | |
1051 | "start the array.\n"); | |
1052 | else if (!enough(info.array.level, | |
1053 | info.array.raid_disks, | |
1054 | info.array.layout, clean, | |
1055 | avail, okcnt)) | |
1056 | fprintf(stderr, Name ": Not enough devices to " | |
1057 | "start the array while not clean " | |
1058 | "- consider --force.\n"); | |
1059 | ||
7f91af49 | 1060 | if (auto_assem) |
1c203a4b | 1061 | ioctl(mdfd, STOP_ARRAY, NULL); |
7f91af49 | 1062 | close(mdfd); |
64c4757e NB |
1063 | return 1; |
1064 | } | |
82b27616 | 1065 | if (runstop == -1) { |
b8a8ccf9 | 1066 | fprintf(stderr, Name ": %s assembled from %d drive%s", |
52826846 | 1067 | mddev, okcnt, okcnt==1?"":"s"); |
b8a8ccf9 NB |
1068 | if (okcnt != info.array.raid_disks) |
1069 | fprintf(stderr, " (out of %d)", info.array.raid_disks); | |
1070 | fprintf(stderr, ", but not started.\n"); | |
7f91af49 | 1071 | close(mdfd); |
64c4757e | 1072 | return 0; |
82b27616 | 1073 | } |
4855f95c | 1074 | if (verbose >= -1) { |
dab6685f NB |
1075 | fprintf(stderr, Name ": %s assembled from %d drive%s", mddev, okcnt, okcnt==1?"":"s"); |
1076 | if (sparecnt) | |
1077 | fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s"); | |
583315d9 NB |
1078 | if (!enough(info.array.level, info.array.raid_disks, |
1079 | info.array.layout, 1, avail, okcnt)) | |
dab6685f | 1080 | fprintf(stderr, " - not enough to start the array.\n"); |
583315d9 NB |
1081 | else if (!enough(info.array.level, |
1082 | info.array.raid_disks, | |
1083 | info.array.layout, clean, | |
1084 | avail, okcnt)) | |
1085 | fprintf(stderr, " - not enough to start the " | |
1086 | "array while not clean - consider " | |
1087 | "--force.\n"); | |
dab6685f NB |
1088 | else { |
1089 | if (req_cnt == info.array.raid_disks) | |
1090 | fprintf(stderr, " - need all %d to start it", req_cnt); | |
1091 | else | |
1092 | fprintf(stderr, " - need %d of %d to start", req_cnt, info.array.raid_disks); | |
1093 | fprintf(stderr, " (use --run to insist).\n"); | |
1094 | } | |
aa88f531 | 1095 | } |
7f91af49 | 1096 | if (auto_assem) |
1c203a4b | 1097 | ioctl(mdfd, STOP_ARRAY, NULL); |
64c4757e | 1098 | return 1; |
82b27616 | 1099 | } else { |
52826846 NB |
1100 | /* The "chosen_drive" is a good choice, and if necessary, the superblock has |
1101 | * been updated to point to the current locations of devices. | |
1102 | * so we can just start the array | |
82b27616 | 1103 | */ |
cd29a5c8 | 1104 | unsigned long dev; |
213ee40b NB |
1105 | dev = makedev(devices[chosen_drive].i.disk.major, |
1106 | devices[chosen_drive].i.disk.minor); | |
82b27616 NB |
1107 | if (ioctl(mdfd, START_ARRAY, dev)) { |
1108 | fprintf(stderr, Name ": Cannot start array: %s\n", | |
1109 | strerror(errno)); | |
1110 | } | |
aba69144 | 1111 | |
64c4757e | 1112 | } |
7f91af49 | 1113 | close(mdfd); |
e0d19036 | 1114 | return 0; |
64c4757e | 1115 | } |