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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 | ||
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 | */ | |
d55e3aef | 114 | int must_close = 0; |
64c4757e | 115 | int old_linux = 0; |
41a3b72a | 116 | int vers = 0; /* Keep gcc quite - it really is initialised */ |
4b1ac34b | 117 | void *first_super = NULL, *super = NULL; |
64c4757e NB |
118 | struct { |
119 | char *devname; | |
98c6faba NB |
120 | unsigned int major, minor; |
121 | unsigned int oldmajor, oldminor; | |
64c4757e | 122 | long long events; |
64c4757e | 123 | int uptodate; |
d013a55e | 124 | int state; |
52826846 | 125 | int raid_disk; |
6a41304b | 126 | int disk_nr; |
5787fa49 | 127 | } *devices; |
56eedc1a | 128 | int *best = NULL; /* indexed by raid_disk */ |
98c6faba NB |
129 | unsigned int bestcnt = 0; |
130 | int devcnt = 0; | |
131 | unsigned int okcnt, sparecnt; | |
132 | unsigned int req_cnt; | |
133 | unsigned int i; | |
64c4757e | 134 | int most_recent = 0; |
cd29a5c8 | 135 | int chosen_drive; |
52826846 | 136 | int change = 0; |
cd29a5c8 | 137 | int inargv = 0; |
589395d6 | 138 | int start_partial_ok = (runstop >= 0) && (force || devlist==NULL || mdfd < 0); |
98c6faba | 139 | unsigned int num_devs; |
5787fa49 | 140 | mddev_dev_t tmpdev; |
4b1ac34b | 141 | struct mdinfo info; |
265e0f17 | 142 | char *avail; |
308e1801 | 143 | int nextspare = 0; |
8a46fe84 | 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 | |
5787fa49 NB |
188 | tmpdev = devlist; num_devs = 0; |
189 | while (tmpdev) { | |
da6b5ca9 NB |
190 | if (tmpdev->used) |
191 | tmpdev->used = 2; | |
192 | else | |
193 | num_devs++; | |
5787fa49 NB |
194 | tmpdev = tmpdev->next; |
195 | } | |
5787fa49 NB |
196 | devices = malloc(num_devs * sizeof(*devices)); |
197 | ||
82d9eba6 | 198 | if (!st && ident->st) st = ident->st; |
64c4757e | 199 | |
dab6685f | 200 | if (verbose>0) |
82b27616 | 201 | fprintf(stderr, Name ": looking for devices for %s\n", |
8a46fe84 | 202 | mddev ? mddev : "further assembly"); |
82b27616 | 203 | |
811e6cbe NB |
204 | /* first walk the list of devices to find a consistent set |
205 | * that match the criterea, if that is possible. | |
206 | * We flag the one we like with 'used'. | |
207 | */ | |
208 | for (tmpdev = devlist; | |
209 | tmpdev; | |
210 | tmpdev = tmpdev->next) { | |
211 | char *devname = tmpdev->devname; | |
64c4757e NB |
212 | int dfd; |
213 | struct stat stb; | |
82d9eba6 | 214 | struct supertype *tst = st; |
52826846 | 215 | |
da6b5ca9 NB |
216 | if (tmpdev->used > 1) continue; |
217 | ||
52826846 | 218 | if (ident->devices && |
56eedc1a | 219 | !match_oneof(ident->devices, devname)) { |
6a41304b | 220 | if ((inargv && verbose>=0) || verbose > 0) |
56eedc1a | 221 | fprintf(stderr, Name ": %s is not one of %s\n", devname, ident->devices); |
52826846 | 222 | continue; |
56eedc1a | 223 | } |
4b1ac34b NB |
224 | |
225 | if (super) { | |
226 | free(super); | |
227 | super = NULL; | |
228 | } | |
52826846 | 229 | |
8b0dabea | 230 | dfd = dev_open(devname, O_RDONLY|O_EXCL); |
64c4757e | 231 | if (dfd < 0) { |
6a41304b | 232 | if ((inargv && verbose >= 0) || verbose > 0) |
682c7051 | 233 | fprintf(stderr, Name ": cannot open device %s: %s\n", |
64c4757e | 234 | devname, strerror(errno)); |
da6b5ca9 | 235 | tmpdev->used = 2; |
52826846 NB |
236 | } else if (fstat(dfd, &stb)< 0) { |
237 | /* Impossible! */ | |
238 | fprintf(stderr, Name ": fstat failed for %s: %s\n", | |
239 | devname, strerror(errno)); | |
da6b5ca9 | 240 | tmpdev->used = 2; |
cd29a5c8 NB |
241 | } else if ((stb.st_mode & S_IFMT) != S_IFBLK) { |
242 | fprintf(stderr, Name ": %s is not a block device.\n", | |
52826846 | 243 | devname); |
da6b5ca9 | 244 | tmpdev->used = 2; |
82d9eba6 | 245 | } else if (!tst && (tst = guess_super(dfd)) == NULL) { |
6a41304b | 246 | if ((inargv && verbose >= 0) || verbose > 0) |
da6b5ca9 NB |
247 | fprintf(stderr, Name ": no recogniseable superblock on %s\n", |
248 | devname); | |
249 | tmpdev->used = 2; | |
82d9eba6 | 250 | } else if (tst->ss->load_super(tst,dfd, &super, NULL)) { |
6a41304b | 251 | if ((inargv && verbose >= 0) || verbose > 0) |
682c7051 | 252 | fprintf( stderr, Name ": no RAID superblock on %s\n", |
64c4757e | 253 | devname); |
52826846 | 254 | } else { |
31317663 | 255 | tst->ss->getinfo_super(&info, super); |
64c4757e | 256 | } |
c06487ce | 257 | if (dfd >= 0) close(dfd); |
52826846 | 258 | |
838acbc2 | 259 | if (ident->uuid_set && (!update || strcmp(update, "uuid")!= 0) && |
f277ce36 | 260 | (!super || same_uuid(info.uuid, ident->uuid, tst->ss->swapuuid)==0)) { |
6a41304b | 261 | if ((inargv && verbose >= 0) || verbose > 0) |
52826846 NB |
262 | fprintf(stderr, Name ": %s has wrong uuid.\n", |
263 | devname); | |
264 | continue; | |
82b27616 | 265 | } |
c4f12c13 | 266 | if (ident->name[0] && (!update || strcmp(update, "name")!= 0) && |
624920bb | 267 | (!super || name_matches(info.name, ident->name, homehost)==0)) { |
6a41304b | 268 | if ((inargv && verbose >= 0) || verbose > 0) |
947fd4dd NB |
269 | fprintf(stderr, Name ": %s has wrong name.\n", |
270 | devname); | |
271 | continue; | |
272 | } | |
98c6faba | 273 | if (ident->super_minor != UnSet && |
4b1ac34b | 274 | (!super || 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 NB |
277 | devname); |
278 | continue; | |
279 | } | |
98c6faba | 280 | if (ident->level != UnSet && |
4b1ac34b | 281 | (!super|| ident->level != info.array.level)) { |
6a41304b | 282 | if ((inargv && verbose >= 0) || verbose > 0) |
cd29a5c8 NB |
283 | fprintf(stderr, Name ": %s has wrong raid level.\n", |
284 | devname); | |
285 | continue; | |
286 | } | |
98c6faba | 287 | if (ident->raid_disks != UnSet && |
4b1ac34b | 288 | (!super || ident->raid_disks!= info.array.raid_disks)) { |
6a41304b | 289 | if ((inargv && verbose >= 0) || verbose > 0) |
cd29a5c8 NB |
290 | fprintf(stderr, Name ": %s requires wrong number of drives.\n", |
291 | devname); | |
292 | continue; | |
293 | } | |
da6b5ca9 NB |
294 | if (mdfd < 0) { |
295 | if (tst == NULL || super == NULL) | |
296 | continue; | |
589395d6 NB |
297 | if (update == NULL && |
298 | tst->ss->match_home(super, homehost)==0) { | |
da6b5ca9 NB |
299 | if ((inargv && verbose >= 0) || verbose > 0) |
300 | fprintf(stderr, Name ": %s is not built for host %s.\n", | |
301 | devname, homehost); | |
302 | /* Auto-assemble, and this is not a usable host */ | |
589395d6 NB |
303 | /* if update != NULL, we are updating the host |
304 | * name... */ | |
da6b5ca9 NB |
305 | continue; |
306 | } | |
307 | } | |
83b6208e | 308 | /* If we are this far, then we are nearly commited to this device. |
52826846 | 309 | * If the super_block doesn't exist, or doesn't match others, |
83b6208e NB |
310 | * then we probably cannot continue |
311 | * However if one of the arrays is for the homehost, and | |
312 | * the other isn't that can disambiguate. | |
52826846 | 313 | */ |
52826846 | 314 | |
4b1ac34b | 315 | if (!super) { |
52826846 NB |
316 | fprintf(stderr, Name ": %s has no superblock - assembly aborted\n", |
317 | devname); | |
4b1ac34b | 318 | free(first_super); |
52826846 NB |
319 | return 1; |
320 | } | |
838acbc2 | 321 | |
83b6208e NB |
322 | if (st == NULL) |
323 | st = tst; | |
324 | if (st->ss != tst->ss || | |
325 | st->minor_version != tst->minor_version || | |
326 | st->ss->compare_super(&first_super, super) != 0) { | |
327 | /* Some mismatch. If exactly one array matches this host, | |
da6b5ca9 NB |
328 | * we can resolve on that one. |
329 | * Or, if we are auto assembling, we just ignore the second | |
330 | * for now. | |
83b6208e | 331 | */ |
da6b5ca9 NB |
332 | if (mdfd < 0) |
333 | continue; | |
83b6208e NB |
334 | if (homehost) { |
335 | int first = st->ss->match_home(first_super, homehost); | |
336 | int last = tst->ss->match_home(super, homehost); | |
337 | if (first+last == 1) { | |
338 | /* We can do something */ | |
339 | if (first) {/* just ignore this one */ | |
340 | if ((inargv && verbose >= 0) || verbose > 0) | |
341 | fprintf(stderr, Name ": %s misses out due to wrong homehost\n", | |
342 | devname); | |
343 | continue; | |
344 | } else { /* reject all those sofar */ | |
345 | mddev_dev_t td; | |
346 | if ((inargv && verbose >= 0) || verbose > 0) | |
347 | fprintf(stderr, Name ": %s overrides previous devices due to good homehost\n", | |
348 | devname); | |
349 | for (td=devlist; td != tmpdev; td=td->next) | |
350 | if (td->used == 1) | |
351 | td->used = 0; | |
352 | tmpdev->used = 1; | |
353 | continue; | |
354 | } | |
355 | } | |
356 | } | |
52826846 NB |
357 | fprintf(stderr, Name ": superblock on %s doesn't match others - assembly aborted\n", |
358 | devname); | |
4b1ac34b NB |
359 | free(super); |
360 | free(first_super); | |
52826846 | 361 | return 1; |
64c4757e NB |
362 | } |
363 | ||
811e6cbe NB |
364 | tmpdev->used = 1; |
365 | } | |
366 | ||
8a46fe84 NB |
367 | if (mdfd < 0) { |
368 | /* So... it is up to me to open the device. | |
369 | * We create a name '/dev/md/XXX' based on the info in the | |
370 | * superblock, and call open_mddev on that | |
371 | */ | |
da6b5ca9 NB |
372 | mdu_array_info_t inf; |
373 | char *c; | |
374 | if (!first_super) { | |
d55e3aef | 375 | return 2; |
da6b5ca9 NB |
376 | } |
377 | st->ss->getinfo_super(&info, first_super); | |
378 | c = strchr(info.name, ':'); | |
379 | if (c) c++; else c= info.name; | |
41a3b72a NB |
380 | if (isdigit(*c) && ((ident->autof & 7)==4 || (ident->autof&7)==6)) |
381 | /* /dev/md/d0 style for partitionable */ | |
382 | asprintf(&mddev, "/dev/md/d%s", c); | |
383 | else | |
384 | asprintf(&mddev, "/dev/md/%s", c); | |
da6b5ca9 | 385 | mdfd = open_mddev(mddev, ident->autof); |
8a46fe84 NB |
386 | if (mdfd < 0) |
387 | return mdfd; | |
da6b5ca9 NB |
388 | vers = md_get_version(mdfd); |
389 | if (ioctl(mdfd, GET_ARRAY_INFO, &inf)==0) { | |
390 | fprintf(stderr, Name ": %s already active, cannot restart it!\n", mddev); | |
391 | close(mdfd); | |
392 | free(first_super); | |
393 | return 1; | |
394 | } | |
d55e3aef | 395 | must_close = 1; |
8a46fe84 NB |
396 | } |
397 | ||
811e6cbe | 398 | /* Ok, no bad inconsistancy, we can try updating etc */ |
da6b5ca9 | 399 | for (tmpdev = devlist; tmpdev; tmpdev=tmpdev->next) if (tmpdev->used == 1) { |
811e6cbe NB |
400 | char *devname = tmpdev->devname; |
401 | struct stat stb; | |
5787fa49 | 402 | /* looks like a good enough match to update the super block if needed */ |
d1f1011b | 403 | #ifndef MDASSEMBLE |
5787fa49 | 404 | if (update) { |
811e6cbe | 405 | int dfd; |
4b1ac34b NB |
406 | /* prepare useful information in info structures */ |
407 | struct stat stb2; | |
408 | fstat(mdfd, &stb2); | |
7d99579f NB |
409 | |
410 | if (strcmp(update, "uuid")==0 && | |
411 | !ident->uuid_set) { | |
412 | int rfd; | |
413 | if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 || | |
414 | read(rfd, ident->uuid, 16) != 16) { | |
415 | *(__u32*)(ident->uuid) = random(); | |
416 | *(__u32*)(ident->uuid+1) = random(); | |
417 | *(__u32*)(ident->uuid+2) = random(); | |
418 | *(__u32*)(ident->uuid+3) = random(); | |
419 | } | |
420 | if (rfd >= 0) close(rfd); | |
7d99579f | 421 | } |
811e6cbe NB |
422 | dfd = dev_open(devname, O_RDWR|O_EXCL); |
423 | ||
424 | if (super) { | |
425 | free(super); | |
426 | super = NULL; | |
427 | } | |
428 | ||
429 | st->ss->load_super(st, dfd, &super, NULL); | |
430 | st->ss->getinfo_super(&info, super); | |
431 | ||
7d99579f | 432 | memcpy(info.uuid, ident->uuid, 16); |
e5eac01f | 433 | strcpy(info.name, ident->name); |
811e6cbe NB |
434 | info.array.md_minor = minor(stb2.st_rdev); |
435 | ||
e5eac01f NB |
436 | st->ss->update_super(&info, super, update, devname, verbose, |
437 | ident->uuid_set, homehost); | |
438 | if (strcmp(update, "uuid")==0 && | |
439 | !ident->uuid_set) { | |
440 | ident->uuid_set = 1; | |
441 | memcpy(ident->uuid, info.uuid, 16); | |
442 | } | |
b8a8ccf9 | 443 | if (dfd < 0) |
5787fa49 NB |
444 | fprintf(stderr, Name ": Cannot open %s for superblock update\n", |
445 | devname); | |
96395475 | 446 | else if (st->ss->store_super(st, dfd, super)) |
5787fa49 NB |
447 | fprintf(stderr, Name ": Could not re-write superblock on %s.\n", |
448 | devname); | |
449 | if (dfd >= 0) | |
450 | close(dfd); | |
8131b493 NB |
451 | |
452 | if (strcmp(update, "uuid")==0 && | |
453 | ident->bitmap_fd) | |
9fca7d62 NB |
454 | if (bitmap_update_uuid(ident->bitmap_fd, info.uuid) != 0) |
455 | fprintf(stderr, Name ": Could not update uuid on %s.\n", | |
456 | devname); | |
d1f1011b NB |
457 | } else |
458 | #endif | |
459 | { | |
da6b5ca9 NB |
460 | int dfd; |
461 | dfd = dev_open(devname, O_RDWR|O_EXCL); | |
462 | ||
463 | if (super) { | |
464 | free(super); | |
465 | super = NULL; | |
466 | } | |
467 | ||
468 | st->ss->load_super(st, dfd, &super, NULL); | |
469 | st->ss->getinfo_super(&info, super); | |
470 | close(dfd); | |
5787fa49 NB |
471 | } |
472 | ||
811e6cbe NB |
473 | stat(devname, &stb); |
474 | ||
dab6685f | 475 | if (verbose > 0) |
cd29a5c8 | 476 | fprintf(stderr, Name ": %s is identified as a member of %s, slot %d.\n", |
4b1ac34b | 477 | devname, mddev, info.disk.raid_disk); |
64c4757e | 478 | devices[devcnt].devname = devname; |
0df46c2a NB |
479 | devices[devcnt].major = major(stb.st_rdev); |
480 | devices[devcnt].minor = minor(stb.st_rdev); | |
4b1ac34b NB |
481 | devices[devcnt].oldmajor = info.disk.major; |
482 | devices[devcnt].oldminor = info.disk.minor; | |
483 | devices[devcnt].events = info.events; | |
484 | devices[devcnt].raid_disk = info.disk.raid_disk; | |
6a41304b | 485 | devices[devcnt].disk_nr = info.disk.number; |
64c4757e | 486 | devices[devcnt].uptodate = 0; |
4b1ac34b | 487 | devices[devcnt].state = info.disk.state; |
64c4757e NB |
488 | if (most_recent < devcnt) { |
489 | if (devices[devcnt].events | |
490 | > devices[most_recent].events) | |
491 | most_recent = devcnt; | |
492 | } | |
b8a8ccf9 | 493 | if (info.array.level == -4) |
5787fa49 NB |
494 | /* with multipath, the raid_disk from the superblock is meaningless */ |
495 | i = devcnt; | |
496 | else | |
497 | i = devices[devcnt].raid_disk; | |
308e1801 NB |
498 | if (i+1 == 0) { |
499 | if (nextspare < info.array.raid_disks) | |
500 | nextspare = info.array.raid_disks; | |
501 | i = nextspare++; | |
08110d41 NB |
502 | } else { |
503 | if (i >= info.array.raid_disks && | |
504 | i >= nextspare) | |
505 | nextspare = i+1; | |
308e1801 | 506 | } |
98c6faba | 507 | if (i < 10000) { |
56eedc1a | 508 | if (i >= bestcnt) { |
98c6faba | 509 | unsigned int newbestcnt = i+10; |
56eedc1a | 510 | int *newbest = malloc(sizeof(int)*newbestcnt); |
98c6faba | 511 | unsigned int c; |
56eedc1a NB |
512 | for (c=0; c < newbestcnt; c++) |
513 | if (c < bestcnt) | |
514 | newbest[c] = best[c]; | |
515 | else | |
516 | newbest[c] = -1; | |
517 | if (best)free(best); | |
518 | best = newbest; | |
519 | bestcnt = newbestcnt; | |
520 | } | |
6a255b69 NB |
521 | if (best[i] >=0 && |
522 | devices[best[i]].events == devices[devcnt].events && | |
523 | devices[best[i]].minor != devices[devcnt].minor && | |
524 | st->ss->major == 0 && | |
525 | info.array.level != -4) { | |
526 | /* two different devices with identical superblock. | |
527 | * Could be a mis-detection caused by overlapping | |
528 | * partitions. fail-safe. | |
529 | */ | |
530 | fprintf(stderr, Name ": WARNING %s and %s appear" | |
531 | " to have very similar superblocks.\n" | |
532 | " If they are really different, " | |
533 | "please --zero the superblock on one\n" | |
534 | " If they are the same, please remove " | |
535 | "one from the list.\n", | |
536 | devices[best[i]].devname, devname); | |
537 | if (must_close) close(mdfd); | |
538 | return 1; | |
539 | } | |
52826846 NB |
540 | if (best[i] == -1 |
541 | || devices[best[i]].events < devices[devcnt].events) | |
542 | best[i] = devcnt; | |
56eedc1a | 543 | } |
64c4757e NB |
544 | devcnt++; |
545 | } | |
546 | ||
4b1ac34b NB |
547 | if (super) |
548 | free(super); | |
549 | super = NULL; | |
550 | ||
586ed405 NB |
551 | if (update && strcmp(update, "byteorder")==0) |
552 | st->minor_version = 90; | |
553 | ||
64c4757e | 554 | if (devcnt == 0) { |
682c7051 | 555 | fprintf(stderr, Name ": no devices found for %s\n", |
64c4757e | 556 | mddev); |
4b1ac34b | 557 | free(first_super); |
d55e3aef | 558 | if (must_close) close(mdfd); |
64c4757e NB |
559 | return 1; |
560 | } | |
4b1ac34b | 561 | |
31317663 | 562 | st->ss->getinfo_super(&info, first_super); |
4b1ac34b | 563 | |
64c4757e NB |
564 | /* now we have some devices that might be suitable. |
565 | * I wonder how many | |
566 | */ | |
265e0f17 NB |
567 | avail = malloc(info.array.raid_disks); |
568 | memset(avail, 0, info.array.raid_disks); | |
64c4757e | 569 | okcnt = 0; |
52826846 | 570 | sparecnt=0; |
56eedc1a | 571 | for (i=0; i< bestcnt ;i++) { |
64c4757e | 572 | int j = best[i]; |
ee04451c NB |
573 | int event_margin = 1; /* always allow a difference of '1' |
574 | * like the kernel does | |
575 | */ | |
64c4757e | 576 | if (j < 0) continue; |
d013a55e NB |
577 | /* note: we ignore error flags in multipath arrays |
578 | * as they don't make sense | |
579 | */ | |
4b1ac34b | 580 | if (info.array.level != -4) |
aa88f531 NB |
581 | if (!(devices[j].state & (1<<MD_DISK_SYNC))) { |
582 | if (!(devices[j].state & (1<<MD_DISK_FAULTY))) | |
583 | sparecnt++; | |
d013a55e | 584 | continue; |
aa88f531 | 585 | } |
cd29a5c8 | 586 | if (devices[j].events+event_margin >= |
64c4757e NB |
587 | devices[most_recent].events) { |
588 | devices[j].uptodate = 1; | |
265e0f17 | 589 | if (i < info.array.raid_disks) { |
52826846 | 590 | okcnt++; |
265e0f17 NB |
591 | avail[i]=1; |
592 | } else | |
52826846 | 593 | sparecnt++; |
64c4757e NB |
594 | } |
595 | } | |
265e0f17 NB |
596 | while (force && !enough(info.array.level, info.array.raid_disks, |
597 | info.array.layout, | |
598 | avail, okcnt)) { | |
64c4757e NB |
599 | /* Choose the newest best drive which is |
600 | * not up-to-date, update the superblock | |
601 | * and add it. | |
602 | */ | |
52826846 | 603 | int fd; |
cd29a5c8 | 604 | chosen_drive = -1; |
4b1ac34b | 605 | for (i=0; i<info.array.raid_disks && i < bestcnt; i++) { |
52826846 NB |
606 | int j = best[i]; |
607 | if (j>=0 && | |
608 | !devices[j].uptodate && | |
609 | devices[j].events > 0 && | |
610 | (chosen_drive < 0 || | |
611 | devices[j].events > devices[chosen_drive].events)) | |
612 | chosen_drive = j; | |
613 | } | |
614 | if (chosen_drive < 0) | |
615 | break; | |
dab6685f NB |
616 | if (verbose >= 0) |
617 | fprintf(stderr, Name ": forcing event count in %s(%d) from %d upto %d\n", | |
618 | devices[chosen_drive].devname, devices[chosen_drive].raid_disk, | |
619 | (int)(devices[chosen_drive].events), | |
620 | (int)(devices[most_recent].events)); | |
8b0dabea | 621 | fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL); |
52826846 NB |
622 | if (fd < 0) { |
623 | fprintf(stderr, Name ": Couldn't open %s for write - not updating\n", | |
624 | devices[chosen_drive].devname); | |
625 | devices[chosen_drive].events = 0; | |
626 | continue; | |
627 | } | |
82d9eba6 | 628 | if (st->ss->load_super(st,fd, &super, NULL)) { |
52826846 NB |
629 | close(fd); |
630 | fprintf(stderr, Name ": RAID superblock disappeared from %s - not updating.\n", | |
631 | devices[chosen_drive].devname); | |
632 | devices[chosen_drive].events = 0; | |
633 | continue; | |
634 | } | |
4b1ac34b | 635 | info.events = devices[most_recent].events; |
e5eac01f | 636 | st->ss->update_super(&info, super, "force", devices[chosen_drive].devname, verbose, 0, NULL); |
4b1ac34b | 637 | |
96395475 | 638 | if (st->ss->store_super(st, fd, super)) { |
52826846 NB |
639 | close(fd); |
640 | fprintf(stderr, Name ": Could not re-write superblock on %s\n", | |
641 | devices[chosen_drive].devname); | |
642 | devices[chosen_drive].events = 0; | |
4b1ac34b | 643 | free(super); |
52826846 NB |
644 | continue; |
645 | } | |
646 | close(fd); | |
647 | devices[chosen_drive].events = devices[most_recent].events; | |
648 | devices[chosen_drive].uptodate = 1; | |
265e0f17 | 649 | avail[chosen_drive] = 1; |
52826846 | 650 | okcnt++; |
4b1ac34b | 651 | free(super); |
64c4757e | 652 | } |
52826846 NB |
653 | |
654 | /* Now we want to look at the superblock which the kernel will base things on | |
655 | * and compare the devices that we think are working with the devices that the | |
656 | * superblock thinks are working. | |
657 | * If there are differences and --force is given, then update this chosen | |
658 | * superblock. | |
659 | */ | |
cd29a5c8 | 660 | chosen_drive = -1; |
4b1ac34b | 661 | super = NULL; |
56eedc1a | 662 | for (i=0; chosen_drive < 0 && i<bestcnt; i++) { |
52826846 NB |
663 | int j = best[i]; |
664 | int fd; | |
4b1ac34b | 665 | |
52826846 NB |
666 | if (j<0) |
667 | continue; | |
668 | if (!devices[j].uptodate) | |
669 | continue; | |
670 | chosen_drive = j; | |
8b0dabea | 671 | if ((fd=dev_open(devices[j].devname, O_RDONLY|O_EXCL))< 0) { |
52826846 NB |
672 | fprintf(stderr, Name ": Cannot open %s: %s\n", |
673 | devices[j].devname, strerror(errno)); | |
d55e3aef | 674 | if (must_close) close(mdfd); |
52826846 NB |
675 | return 1; |
676 | } | |
82d9eba6 | 677 | if (st->ss->load_super(st,fd, &super, NULL)) { |
52826846 NB |
678 | close(fd); |
679 | fprintf(stderr, Name ": RAID superblock has disappeared from %s\n", | |
680 | devices[j].devname); | |
d55e3aef | 681 | if (must_close) close(mdfd); |
52826846 NB |
682 | return 1; |
683 | } | |
684 | close(fd); | |
685 | } | |
4b1ac34b NB |
686 | if (super == NULL) { |
687 | fprintf(stderr, Name ": No suitable drives found for %s\n", mddev); | |
d55e3aef | 688 | if (must_close) close(mdfd); |
4b1ac34b NB |
689 | return 1; |
690 | } | |
31317663 | 691 | st->ss->getinfo_super(&info, super); |
56eedc1a | 692 | for (i=0; i<bestcnt; i++) { |
52826846 | 693 | int j = best[i]; |
98c6faba | 694 | unsigned int desired_state; |
11a3e71d | 695 | |
4b1ac34b | 696 | if (i < info.array.raid_disks) |
11a3e71d NB |
697 | desired_state = (1<<MD_DISK_ACTIVE) | (1<<MD_DISK_SYNC); |
698 | else | |
699 | desired_state = 0; | |
700 | ||
52826846 NB |
701 | if (j<0) |
702 | continue; | |
703 | if (!devices[j].uptodate) | |
704 | continue; | |
6a41304b | 705 | info.disk.number = devices[j].disk_nr; |
fbf8a0b7 | 706 | info.disk.raid_disk = i; |
4b1ac34b NB |
707 | info.disk.state = desired_state; |
708 | ||
52826846 | 709 | if (devices[j].uptodate && |
e5eac01f | 710 | st->ss->update_super(&info, super, "assemble", NULL, verbose, 0, NULL)) { |
52826846 | 711 | if (force) { |
dab6685f NB |
712 | if (verbose >= 0) |
713 | fprintf(stderr, Name ": " | |
714 | "clearing FAULTY flag for device %d in %s for %s\n", | |
715 | j, mddev, devices[j].devname); | |
4b1ac34b | 716 | change = 1; |
52826846 | 717 | } else { |
dab6685f NB |
718 | if (verbose >= -1) |
719 | fprintf(stderr, Name ": " | |
720 | "device %d in %s has wrong state in superblock, but %s seems ok\n", | |
721 | i, mddev, devices[j].devname); | |
52826846 NB |
722 | } |
723 | } | |
4b1ac34b | 724 | #if 0 |
52826846 NB |
725 | if (!devices[j].uptodate && |
726 | !(super.disks[i].state & (1 << MD_DISK_FAULTY))) { | |
727 | fprintf(stderr, Name ": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n", | |
728 | i, mddev); | |
729 | } | |
4b1ac34b | 730 | #endif |
52826846 | 731 | } |
4b1ac34b NB |
732 | if (force && okcnt == info.array.raid_disks-1) { |
733 | /* FIXME check event count */ | |
b8a8ccf9 | 734 | change += st->ss->update_super(&info, super, "force", |
e5eac01f | 735 | devices[chosen_drive].devname, verbose, 0, NULL); |
d013a55e | 736 | } |
52826846 | 737 | |
4b1ac34b | 738 | if (change) { |
52826846 | 739 | int fd; |
8b0dabea | 740 | fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL); |
52826846 | 741 | if (fd < 0) { |
353632d9 | 742 | fprintf(stderr, Name ": Could not open %s for write - cannot Assemble array.\n", |
52826846 | 743 | devices[chosen_drive].devname); |
d55e3aef | 744 | if (must_close) close(mdfd); |
52826846 NB |
745 | return 1; |
746 | } | |
96395475 | 747 | if (st->ss->store_super(st, fd, super)) { |
52826846 NB |
748 | close(fd); |
749 | fprintf(stderr, Name ": Could not re-write superblock on %s\n", | |
750 | devices[chosen_drive].devname); | |
d55e3aef | 751 | if (must_close) close(mdfd); |
52826846 NB |
752 | return 1; |
753 | } | |
754 | close(fd); | |
52826846 NB |
755 | } |
756 | ||
353632d9 NB |
757 | /* If we are in the middle of a reshape we may need to restore saved data |
758 | * that was moved aside due to the reshape overwriting live data | |
759 | * The code of doing this lives in Grow.c | |
760 | */ | |
39c5a909 | 761 | #ifndef MDASSEMBLE |
353632d9 NB |
762 | if (info.reshape_active) { |
763 | int err = 0; | |
764 | int *fdlist = malloc(sizeof(int)* bestcnt); | |
765 | for (i=0; i<bestcnt; i++) { | |
766 | int j = best[i]; | |
767 | if (j >= 0) { | |
768 | fdlist[i] = dev_open(devices[j].devname, O_RDWR|O_EXCL); | |
769 | if (fdlist[i] < 0) { | |
770 | fprintf(stderr, Name ": Could not open %s for write - cannot Assemble array.\n", | |
771 | devices[j].devname); | |
772 | err = 1; | |
773 | break; | |
774 | } | |
775 | } else | |
776 | fdlist[i] = -1; | |
777 | } | |
778 | if (!err) | |
06b0d786 | 779 | err = Grow_restart(st, &info, fdlist, bestcnt, backup_file); |
353632d9 NB |
780 | while (i>0) { |
781 | i--; | |
782 | if (fdlist[i]>=0) close(fdlist[i]); | |
783 | } | |
784 | if (err) { | |
785 | fprintf(stderr, Name ": Failed to restore critical section for reshape, sorry.\n"); | |
d55e3aef | 786 | if (must_close) close(mdfd); |
353632d9 NB |
787 | return err; |
788 | } | |
789 | } | |
39c5a909 | 790 | #endif |
aa88f531 NB |
791 | /* count number of in-sync devices according to the superblock. |
792 | * We must have this number to start the array without -s or -R | |
793 | */ | |
4b1ac34b | 794 | req_cnt = info.array.working_disks; |
aa88f531 | 795 | |
64c4757e NB |
796 | /* Almost ready to actually *do* something */ |
797 | if (!old_linux) { | |
fbf8a0b7 NB |
798 | int rv; |
799 | if ((vers % 100) >= 1) { /* can use different versions */ | |
800 | mdu_array_info_t inf; | |
801 | memset(&inf, 0, sizeof(inf)); | |
802 | inf.major_version = st->ss->major; | |
803 | inf.minor_version = st->minor_version; | |
804 | rv = ioctl(mdfd, SET_ARRAY_INFO, &inf); | |
b8a8ccf9 | 805 | } else |
fbf8a0b7 NB |
806 | rv = ioctl(mdfd, SET_ARRAY_INFO, NULL); |
807 | ||
808 | if (rv) { | |
682c7051 | 809 | fprintf(stderr, Name ": SET_ARRAY_INFO failed for %s: %s\n", |
64c4757e | 810 | mddev, strerror(errno)); |
d55e3aef | 811 | if (must_close) close(mdfd); |
64c4757e NB |
812 | return 1; |
813 | } | |
11484a63 | 814 | if (ident->bitmap_fd >= 0) { |
c82f047c NB |
815 | if (ioctl(mdfd, SET_BITMAP_FILE, ident->bitmap_fd) != 0) { |
816 | fprintf(stderr, Name ": SET_BITMAP_FILE failed.\n"); | |
d55e3aef | 817 | if (must_close) close(mdfd); |
c82f047c NB |
818 | return 1; |
819 | } | |
7ef02d01 NB |
820 | } else if (ident->bitmap_file) { |
821 | /* From config file */ | |
822 | int bmfd = open(ident->bitmap_file, O_RDWR); | |
823 | if (bmfd < 0) { | |
824 | fprintf(stderr, Name ": Could not open bitmap file %s\n", | |
825 | ident->bitmap_file); | |
d55e3aef | 826 | if (must_close) close(mdfd); |
7ef02d01 NB |
827 | return 1; |
828 | } | |
829 | if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) { | |
830 | fprintf(stderr, Name ": Failed to set bitmapfile for %s\n", mddev); | |
831 | close(bmfd); | |
d55e3aef | 832 | if (must_close) close(mdfd); |
7ef02d01 NB |
833 | return 1; |
834 | } | |
835 | close(bmfd); | |
c82f047c | 836 | } |
7ef02d01 | 837 | |
52826846 | 838 | /* First, add the raid disks, but add the chosen one last */ |
56eedc1a | 839 | for (i=0; i<= bestcnt; i++) { |
52826846 | 840 | int j; |
56eedc1a | 841 | if (i < bestcnt) { |
52826846 NB |
842 | j = best[i]; |
843 | if (j == chosen_drive) | |
844 | continue; | |
845 | } else | |
846 | j = chosen_drive; | |
847 | ||
56eedc1a | 848 | if (j >= 0 /* && devices[j].uptodate */) { |
64c4757e NB |
849 | mdu_disk_info_t disk; |
850 | memset(&disk, 0, sizeof(disk)); | |
851 | disk.major = devices[j].major; | |
852 | disk.minor = devices[j].minor; | |
853 | if (ioctl(mdfd, ADD_NEW_DISK, &disk)!=0) { | |
682c7051 | 854 | fprintf(stderr, Name ": failed to add %s to %s: %s\n", |
64c4757e NB |
855 | devices[j].devname, |
856 | mddev, | |
857 | strerror(errno)); | |
4b1ac34b | 858 | if (i < info.array.raid_disks || i == bestcnt) |
52826846 NB |
859 | okcnt--; |
860 | else | |
861 | sparecnt--; | |
dab6685f | 862 | } else if (verbose > 0) |
52826846 NB |
863 | fprintf(stderr, Name ": added %s to %s as %d\n", |
864 | devices[j].devname, mddev, devices[j].raid_disk); | |
dab6685f | 865 | } else if (verbose > 0 && i < info.array.raid_disks) |
682c7051 | 866 | fprintf(stderr, Name ": no uptodate device for slot %d of %s\n", |
64c4757e NB |
867 | i, mddev); |
868 | } | |
52826846 | 869 | |
64c4757e | 870 | if (runstop == 1 || |
b8a8ccf9 | 871 | (runstop <= 0 && |
265e0f17 | 872 | ( enough(info.array.level, info.array.raid_disks, info.array.layout, avail, okcnt) && |
aa88f531 NB |
873 | (okcnt >= req_cnt || start_partial_ok) |
874 | ))) { | |
82b27616 | 875 | if (ioctl(mdfd, RUN_ARRAY, NULL)==0) { |
dab6685f NB |
876 | if (verbose >= 0) { |
877 | fprintf(stderr, Name ": %s has been started with %d drive%s", | |
878 | mddev, okcnt, okcnt==1?"":"s"); | |
b8a8ccf9 | 879 | if (okcnt < info.array.raid_disks) |
dab6685f NB |
880 | fprintf(stderr, " (out of %d)", info.array.raid_disks); |
881 | if (sparecnt) | |
882 | fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s"); | |
883 | fprintf(stderr, ".\n"); | |
884 | } | |
589395d6 NB |
885 | if (must_close) { |
886 | int usecs = 1; | |
887 | close(mdfd); | |
888 | /* There is a nasty race with 'mdadm --monitor'. | |
889 | * If it opens this device before we close it, | |
890 | * it gets an incomplete open on which IO | |
891 | * doesn't work and the capacity if wrong. | |
892 | * If we reopen (to check for layered devices) | |
893 | * before --monitor closes, we loose. | |
894 | * | |
895 | * So: wait upto 1 second for there to be | |
896 | * a non-zero capacity. | |
897 | */ | |
898 | while (usecs < 1000) { | |
899 | mdfd = open(mddev, O_RDONLY); | |
900 | if (mdfd >= 0) { | |
901 | unsigned long size; | |
902 | if (ioctl(mdfd, BLKGETSIZE, &size) == 0 && | |
903 | size > 0) | |
904 | break; | |
905 | close(mdfd); | |
906 | } | |
907 | usleep(usecs); | |
908 | usecs <<= 1; | |
909 | } | |
910 | } | |
64c4757e | 911 | return 0; |
82b27616 | 912 | } |
682c7051 | 913 | fprintf(stderr, Name ": failed to RUN_ARRAY %s: %s\n", |
64c4757e | 914 | mddev, strerror(errno)); |
d55e3aef | 915 | if (must_close) close(mdfd); |
64c4757e NB |
916 | return 1; |
917 | } | |
82b27616 | 918 | if (runstop == -1) { |
b8a8ccf9 | 919 | fprintf(stderr, Name ": %s assembled from %d drive%s", |
52826846 | 920 | mddev, okcnt, okcnt==1?"":"s"); |
b8a8ccf9 NB |
921 | if (okcnt != info.array.raid_disks) |
922 | fprintf(stderr, " (out of %d)", info.array.raid_disks); | |
923 | fprintf(stderr, ", but not started.\n"); | |
d55e3aef | 924 | if (must_close) close(mdfd); |
64c4757e | 925 | return 0; |
82b27616 | 926 | } |
dab6685f NB |
927 | if (verbose >= 0) { |
928 | fprintf(stderr, Name ": %s assembled from %d drive%s", mddev, okcnt, okcnt==1?"":"s"); | |
929 | if (sparecnt) | |
930 | fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s"); | |
265e0f17 | 931 | if (!enough(info.array.level, info.array.raid_disks, info.array.layout, avail, okcnt)) |
dab6685f NB |
932 | fprintf(stderr, " - not enough to start the array.\n"); |
933 | else { | |
934 | if (req_cnt == info.array.raid_disks) | |
935 | fprintf(stderr, " - need all %d to start it", req_cnt); | |
936 | else | |
937 | fprintf(stderr, " - need %d of %d to start", req_cnt, info.array.raid_disks); | |
938 | fprintf(stderr, " (use --run to insist).\n"); | |
939 | } | |
aa88f531 | 940 | } |
d55e3aef | 941 | if (must_close) close(mdfd); |
64c4757e | 942 | return 1; |
82b27616 | 943 | } else { |
52826846 NB |
944 | /* The "chosen_drive" is a good choice, and if necessary, the superblock has |
945 | * been updated to point to the current locations of devices. | |
946 | * so we can just start the array | |
82b27616 | 947 | */ |
cd29a5c8 | 948 | unsigned long dev; |
0df46c2a | 949 | dev = makedev(devices[chosen_drive].major, |
82b27616 NB |
950 | devices[chosen_drive].minor); |
951 | if (ioctl(mdfd, START_ARRAY, dev)) { | |
952 | fprintf(stderr, Name ": Cannot start array: %s\n", | |
953 | strerror(errno)); | |
954 | } | |
955 | ||
64c4757e | 956 | } |
d55e3aef | 957 | if (must_close) close(mdfd); |
e0d19036 | 958 | return 0; |
64c4757e | 959 | } |