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Commit | Line | Data |
---|---|---|
8382f19b NB |
1 | /* |
2 | * Incremental.c - support --incremental. Part of: | |
3 | * mdadm - manage Linux "md" devices aka RAID arrays. | |
4 | * | |
e736b623 | 5 | * Copyright (C) 2006-2009 Neil Brown <neilb@suse.de> |
8382f19b NB |
6 | * |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | * | |
22 | * Author: Neil Brown | |
23 | * Email: <neilb@suse.de> | |
24 | * Paper: Neil Brown | |
25 | * Novell Inc | |
26 | * GPO Box Q1283 | |
27 | * QVB Post Office, NSW 1230 | |
28 | * Australia | |
29 | */ | |
30 | ||
31 | #include "mdadm.h" | |
61018da0 N |
32 | #include <dirent.h> |
33 | #include <ctype.h> | |
8382f19b NB |
34 | |
35 | static int count_active(struct supertype *st, int mdfd, char **availp, | |
36 | struct mdinfo *info); | |
7e0f6979 | 37 | static void find_reject(int mdfd, struct supertype *st, struct mdinfo *sra, |
8382f19b NB |
38 | int number, __u64 events, int verbose, |
39 | char *array_name); | |
f08605b3 N |
40 | static int try_spare(char *devname, int *dfdp, struct dev_policy *pol, |
41 | struct supertype *st, int verbose); | |
8382f19b | 42 | |
7d91c3f5 | 43 | static int Incremental_container(struct supertype *st, char *devname, |
47c74f3f N |
44 | char *homehost, |
45 | int verbose, int runstop, int autof); | |
7d91c3f5 | 46 | |
fa56eddb | 47 | static struct mddev_ident *search_mdstat(struct supertype *st, |
3a97f210 N |
48 | struct mdinfo *info, |
49 | char *devname, | |
50 | int verbose, int *rvp); | |
51 | ||
8382f19b | 52 | int Incremental(char *devname, int verbose, int runstop, |
0ac91628 N |
53 | struct supertype *st, char *homehost, int require_homehost, |
54 | int autof) | |
8382f19b NB |
55 | { |
56 | /* Add this device to an array, creating the array if necessary | |
598f0d58 | 57 | * and starting the array if sensible or - if runstop>0 - if possible. |
8382f19b NB |
58 | * |
59 | * This has several steps: | |
60 | * | |
61 | * 1/ Check if device is permitted by mdadm.conf, reject if not. | |
62 | * 2/ Find metadata, reject if none appropriate (check | |
63 | * version/name from args) | |
64 | * 3/ Check if there is a match in mdadm.conf | |
215bb3f7 N |
65 | * 3a/ if not, check for homehost match. If no match, assemble as |
66 | * a 'foreign' array. | |
8382f19b NB |
67 | * 4/ Determine device number. |
68 | * - If in mdadm.conf with std name, use that | |
69 | * - UUID in /var/run/mdadm.map use that | |
70 | * - If name is suggestive, use that. unless in use with different uuid. | |
71 | * - Choose a free, high number. | |
72 | * - Use a partitioned device unless strong suggestion not to. | |
73 | * e.g. auto=md | |
352452c3 | 74 | * Don't choose partitioned for containers. |
8382f19b NB |
75 | * 5/ Find out if array already exists |
76 | * 5a/ if it does not | |
77 | * - choose a name, from mdadm.conf or 'name' field in array. | |
78 | * - create the array | |
79 | * - add the device | |
80 | * 5b/ if it does | |
81 | * - check one drive in array to make sure metadata is a reasonably | |
82 | * close match. Reject if not (e.g. different type) | |
83 | * - add the device | |
84 | * 6/ Make sure /var/run/mdadm.map contains this array. | |
85 | * 7/ Is there enough devices to possibly start the array? | |
352452c3 | 86 | * For a container, this means running Incremental_container. |
8382f19b NB |
87 | * 7a/ if not, finish with success. |
88 | * 7b/ if yes, | |
89 | * - read all metadata and arrange devices like -A does | |
90 | * - if number of OK devices match expected, or -R and there are enough, | |
91 | * start the array (auto-readonly). | |
92 | */ | |
93 | struct stat stb; | |
7e83544b | 94 | struct mdinfo info, dinfo; |
fa56eddb | 95 | struct mddev_ident *match; |
8382f19b | 96 | char chosen_name[1024]; |
15d4a7e4 | 97 | int rv = 1; |
8382f19b | 98 | struct map_ent *mp, *map = NULL; |
15d4a7e4 | 99 | int dfd = -1, mdfd = -1; |
8382f19b NB |
100 | char *avail; |
101 | int active_disks; | |
47c74f3f | 102 | int trustworthy; |
d7288ddc | 103 | char *name_to_use; |
ad5bc697 | 104 | mdu_array_info_t ainf; |
7e83544b | 105 | struct dev_policy *policy = NULL; |
47c74f3f | 106 | unsigned long long size; |
8382f19b NB |
107 | |
108 | struct createinfo *ci = conf_get_create_info(); | |
109 | ||
47c74f3f N |
110 | if (stat(devname, &stb) < 0) { |
111 | if (verbose >= 0) | |
112 | fprintf(stderr, Name ": stat failed for %s: %s.\n", | |
113 | devname, strerror(errno)); | |
114 | return rv; | |
115 | } | |
116 | if ((stb.st_mode & S_IFMT) != S_IFBLK) { | |
117 | if (verbose >= 0) | |
118 | fprintf(stderr, Name ": %s is not a block device.\n", | |
119 | devname); | |
120 | return rv; | |
121 | } | |
122 | dfd = dev_open(devname, O_RDONLY|O_EXCL); | |
123 | if (dfd < 0) { | |
124 | if (verbose >= 0) | |
125 | fprintf(stderr, Name ": cannot open %s: %s.\n", | |
126 | devname, strerror(errno)); | |
127 | return rv; | |
128 | } | |
129 | /* If the device is a container, we do something very different */ | |
130 | if (get_dev_size(dfd, devname, &size) == 0) | |
131 | goto out; | |
132 | if (size == 0) { | |
133 | if (!st) | |
134 | st = super_by_fd(dfd, NULL); | |
135 | if (st) | |
136 | rv = st->ss->load_container(st, dfd, NULL); | |
137 | ||
138 | close(dfd); | |
139 | if (!rv && st->ss->container_content) | |
140 | return Incremental_container(st, devname, homehost, | |
141 | verbose, runstop, autof); | |
142 | ||
143 | fprintf(stderr, Name ": %s is not part of an md array.\n", | |
144 | devname); | |
145 | return rv; | |
146 | } | |
8382f19b | 147 | |
352452c3 | 148 | /* 1/ Check if device is permitted by mdadm.conf */ |
8382f19b NB |
149 | |
150 | if (!conf_test_dev(devname)) { | |
151 | if (verbose >= 0) | |
152 | fprintf(stderr, Name | |
153 | ": %s not permitted by mdadm.conf.\n", | |
154 | devname); | |
15d4a7e4 | 155 | goto out; |
8382f19b NB |
156 | } |
157 | ||
158 | /* 2/ Find metadata, reject if none appropriate (check | |
159 | * version/name from args) */ | |
160 | ||
8382f19b NB |
161 | if (fstat(dfd, &stb) < 0) { |
162 | if (verbose >= 0) | |
163 | fprintf(stderr, Name ": fstat failed for %s: %s.\n", | |
164 | devname, strerror(errno)); | |
15d4a7e4 | 165 | goto out; |
8382f19b NB |
166 | } |
167 | if ((stb.st_mode & S_IFMT) != S_IFBLK) { | |
168 | if (verbose >= 0) | |
169 | fprintf(stderr, Name ": %s is not a block device.\n", | |
170 | devname); | |
15d4a7e4 | 171 | goto out; |
8382f19b NB |
172 | } |
173 | ||
7e83544b N |
174 | dinfo.disk.major = major(stb.st_rdev); |
175 | dinfo.disk.minor = minor(stb.st_rdev); | |
176 | ||
177 | policy = disk_policy(&dinfo); | |
178 | ||
8382f19b NB |
179 | if (st == NULL && (st = guess_super(dfd)) == NULL) { |
180 | if (verbose >= 0) | |
181 | fprintf(stderr, Name | |
182 | ": no recognisable superblock on %s.\n", | |
183 | devname); | |
f08605b3 | 184 | rv = try_spare(devname, &dfd, policy, st, verbose); |
15d4a7e4 | 185 | goto out; |
8382f19b | 186 | } |
0f22b998 N |
187 | if (st->ss->compare_super == NULL || |
188 | st->ss->load_super(st, dfd, NULL)) { | |
8382f19b NB |
189 | if (verbose >= 0) |
190 | fprintf(stderr, Name ": no RAID superblock on %s.\n", | |
191 | devname); | |
f08605b3 | 192 | rv = try_spare(devname, &dfd, policy, st, verbose); |
0f22b998 | 193 | free(st); |
15d4a7e4 | 194 | goto out; |
8382f19b | 195 | } |
15d4a7e4 | 196 | close (dfd); dfd = -1; |
8382f19b | 197 | |
f35f2525 | 198 | memset(&info, 0, sizeof(info)); |
a5d85af7 | 199 | st->ss->getinfo_super(st, &info, NULL); |
8382f19b | 200 | |
3a97f210 N |
201 | /* 3/ Check if there is a match in mdadm.conf */ |
202 | match = search_mdstat(st, &info, devname, verbose, &rv); | |
203 | if (!match && rv == 2) | |
204 | goto out; | |
8382f19b | 205 | |
112cace6 N |
206 | if (match && match->devname |
207 | && strcasecmp(match->devname, "<ignore>") == 0) { | |
208 | if (verbose >= 0) | |
209 | fprintf(stderr, Name ": array containing %s is explicitly" | |
210 | " ignored by mdadm.conf\n", | |
211 | devname); | |
15d4a7e4 | 212 | goto out; |
112cace6 N |
213 | } |
214 | ||
7b403fef N |
215 | /* 3a/ if not, check for homehost match. If no match, continue |
216 | * but don't trust the 'name' in the array. Thus a 'random' minor | |
217 | * number will be assigned, and the device name will be based | |
218 | * on that. */ | |
215bb3f7 N |
219 | if (match) |
220 | trustworthy = LOCAL; | |
d1d3482b N |
221 | else if (st->ss->match_home(st, homehost) == 1) |
222 | trustworthy = LOCAL; | |
223 | else if (st->ss->match_home(st, "any") == 1) | |
224 | trustworthy = LOCAL_ANY; | |
215bb3f7 | 225 | else |
d1d3482b N |
226 | trustworthy = FOREIGN; |
227 | ||
228 | ||
4e8d9f0a | 229 | if (!match && !conf_test_metadata(st->ss->name, policy, |
d1d3482b N |
230 | (trustworthy == LOCAL))) { |
231 | if (verbose >= 1) | |
232 | fprintf(stderr, Name | |
233 | ": %s has metadata type %s for which " | |
234 | "auto-assembly is disabled\n", | |
235 | devname, st->ss->name); | |
15d4a7e4 | 236 | goto out; |
d1d3482b N |
237 | } |
238 | if (trustworthy == LOCAL_ANY) | |
ecb02e31 | 239 | trustworthy = LOCAL; |
e12e1d1d | 240 | |
4ef2f11e N |
241 | /* There are three possible sources for 'autof': command line, |
242 | * ARRAY line in mdadm.conf, or CREATE line in mdadm.conf. | |
350ac35d N |
243 | * ARRAY takes precedence, then command line, then |
244 | * CREATE. | |
4ef2f11e | 245 | */ |
350ac35d | 246 | if (match && match->autof) |
4ef2f11e N |
247 | autof = match->autof; |
248 | if (autof == 0) | |
249 | autof = ci->autof; | |
250 | ||
7cdc0872 | 251 | name_to_use = info.name; |
0ac91628 | 252 | if (name_to_use[0] == 0 && |
ecb02e31 N |
253 | info.array.level == LEVEL_CONTAINER && |
254 | trustworthy == LOCAL) { | |
255 | name_to_use = info.text_version; | |
256 | trustworthy = METADATA; | |
257 | } | |
0ac91628 N |
258 | if (name_to_use[0] && trustworthy != LOCAL && |
259 | ! require_homehost && | |
260 | conf_name_is_free(name_to_use)) | |
261 | trustworthy = LOCAL; | |
ecb02e31 | 262 | |
7cdc0872 N |
263 | /* strip "hostname:" prefix from name if we have decided |
264 | * to treat it as LOCAL | |
265 | */ | |
266 | if (trustworthy == LOCAL && strchr(name_to_use, ':') != NULL) | |
267 | name_to_use = strchr(name_to_use, ':')+1; | |
268 | ||
ad5bc697 | 269 | /* 4/ Check if array exists. |
215bb3f7 | 270 | */ |
93c861ee DL |
271 | if (map_lock(&map)) |
272 | fprintf(stderr, Name ": failed to get exclusive lock on " | |
273 | "mapfile\n"); | |
215bb3f7 | 274 | mp = map_by_uuid(&map, info.uuid); |
339c2d6c N |
275 | if (mp) |
276 | mdfd = open_dev(mp->devnum); | |
277 | else | |
215bb3f7 | 278 | mdfd = -1; |
d7288ddc | 279 | |
8382f19b | 280 | if (mdfd < 0) { |
7e0f6979 | 281 | struct mdinfo *sra; |
8382f19b | 282 | |
215bb3f7 | 283 | /* Couldn't find an existing array, maybe make a new one */ |
ffb3e494 | 284 | mdfd = create_mddev(match ? match->devname : NULL, |
e12e1d1d | 285 | name_to_use, autof, trustworthy, chosen_name); |
215bb3f7 N |
286 | |
287 | if (mdfd < 0) | |
15d4a7e4 | 288 | goto out; |
215bb3f7 N |
289 | |
290 | sysfs_init(&info, mdfd, 0); | |
291 | ||
f35f2525 N |
292 | if (set_array_info(mdfd, st, &info) != 0) { |
293 | fprintf(stderr, Name ": failed to set array info for %s: %s\n", | |
8382f19b | 294 | chosen_name, strerror(errno)); |
15d4a7e4 N |
295 | rv = 2; |
296 | goto out; | |
8382f19b | 297 | } |
7801ac20 | 298 | |
c5afc314 N |
299 | dinfo = info; |
300 | dinfo.disk.major = major(stb.st_rdev); | |
301 | dinfo.disk.minor = minor(stb.st_rdev); | |
302 | if (add_disk(mdfd, st, &info, &dinfo) != 0) { | |
8382f19b NB |
303 | fprintf(stderr, Name ": failed to add %s to %s: %s.\n", |
304 | devname, chosen_name, strerror(errno)); | |
305 | ioctl(mdfd, STOP_ARRAY, 0); | |
15d4a7e4 N |
306 | rv = 2; |
307 | goto out; | |
8382f19b | 308 | } |
197e3eb6 | 309 | sra = sysfs_read(mdfd, fd2devnum(mdfd), GET_DEVS); |
06c7f68e | 310 | if (!sra || !sra->devs || sra->devs->disk.raid_disk >= 0) { |
8382f19b NB |
311 | /* It really should be 'none' - must be old buggy |
312 | * kernel, and mdadm -I may not be able to complete. | |
313 | * So reject it. | |
314 | */ | |
315 | ioctl(mdfd, STOP_ARRAY, NULL); | |
316 | fprintf(stderr, Name | |
317 | ": You have an old buggy kernel which cannot support\n" | |
318 | " --incremental reliably. Aborting.\n"); | |
8382f19b | 319 | sysfs_free(sra); |
15d4a7e4 N |
320 | rv = 2; |
321 | goto out; | |
8382f19b | 322 | } |
c5afc314 | 323 | info.array.working_disks = 1; |
f35f2525 | 324 | sysfs_free(sra); |
ad5bc697 N |
325 | /* 6/ Make sure /var/run/mdadm.map contains this array. */ |
326 | map_update(&map, fd2devnum(mdfd), | |
327 | info.text_version, | |
328 | info.uuid, chosen_name); | |
8382f19b NB |
329 | } else { |
330 | /* 5b/ if it does */ | |
331 | /* - check one drive in array to make sure metadata is a reasonably */ | |
332 | /* close match. Reject if not (e.g. different type) */ | |
333 | /* - add the device */ | |
334 | char dn[20]; | |
335 | int dfd2; | |
8382f19b | 336 | int err; |
7e0f6979 | 337 | struct mdinfo *sra; |
3da92f27 | 338 | struct supertype *st2; |
c5afc314 | 339 | struct mdinfo info2, *d; |
215bb3f7 | 340 | |
339c2d6c N |
341 | if (mp->path) |
342 | strcpy(chosen_name, mp->path); | |
343 | else | |
344 | strcpy(chosen_name, devnum2devname(mp->devnum)); | |
215bb3f7 | 345 | |
ef83fe7c N |
346 | /* It is generally not OK to add non-spare drives to a |
347 | * running array as they are probably missing because | |
348 | * they failed. However if runstop is 1, then the | |
7e83544b N |
349 | * array was possibly started early and our best bet is |
350 | * to add this anyway. | |
351 | * Also if action policy is re-add or better we allow | |
352 | * re-add | |
3a6ec29a | 353 | */ |
ef83fe7c | 354 | if ((info.disk.state & (1<<MD_DISK_SYNC)) != 0 |
7e83544b N |
355 | && ! policy_action_allows(policy, st->ss->name, |
356 | act_re_add) | |
ef83fe7c | 357 | && runstop < 1) { |
1dccfff9 DW |
358 | int active = 0; |
359 | ||
360 | if (st->ss->external) { | |
361 | char *devname = devnum2devname(fd2devnum(mdfd)); | |
362 | ||
363 | active = devname && is_container_active(devname); | |
364 | free(devname); | |
365 | } else if (ioctl(mdfd, GET_ARRAY_INFO, &ainf) == 0) | |
366 | active = 1; | |
367 | if (active) { | |
3a6ec29a N |
368 | fprintf(stderr, Name |
369 | ": not adding %s to active array (without --run) %s\n", | |
370 | devname, chosen_name); | |
15d4a7e4 N |
371 | rv = 2; |
372 | goto out; | |
3a6ec29a N |
373 | } |
374 | } | |
197e3eb6 | 375 | sra = sysfs_read(mdfd, fd2devnum(mdfd), (GET_DEVS | GET_STATE)); |
15d4a7e4 N |
376 | if (!sra) { |
377 | rv = 2; | |
378 | goto out; | |
379 | } | |
7c548327 N |
380 | if (sra->devs) { |
381 | sprintf(dn, "%d:%d", sra->devs->disk.major, | |
382 | sra->devs->disk.minor); | |
383 | dfd2 = dev_open(dn, O_RDONLY); | |
384 | st2 = dup_super(st); | |
385 | if (st2->ss->load_super(st2, dfd2, NULL) || | |
386 | st->ss->compare_super(st, st2) != 0) { | |
387 | fprintf(stderr, Name | |
388 | ": metadata mismatch between %s and " | |
389 | "chosen array %s\n", | |
390 | devname, chosen_name); | |
7c548327 | 391 | close(dfd2); |
15d4a7e4 N |
392 | rv = 2; |
393 | goto out; | |
7c548327 | 394 | } |
8382f19b | 395 | close(dfd2); |
7c548327 | 396 | memset(&info2, 0, sizeof(info2)); |
a5d85af7 | 397 | st2->ss->getinfo_super(st2, &info2, NULL); |
7c548327 N |
398 | st2->ss->free_super(st2); |
399 | if (info.array.level != info2.array.level || | |
400 | memcmp(info.uuid, info2.uuid, 16) != 0 || | |
401 | info.array.raid_disks != info2.array.raid_disks) { | |
402 | fprintf(stderr, Name | |
403 | ": unexpected difference between %s and %s.\n", | |
404 | chosen_name, devname); | |
15d4a7e4 N |
405 | rv = 2; |
406 | goto out; | |
7c548327 | 407 | } |
8382f19b | 408 | } |
7801ac20 N |
409 | info2.disk.major = major(stb.st_rdev); |
410 | info2.disk.minor = minor(stb.st_rdev); | |
c5afc314 N |
411 | /* add disk needs to know about containers */ |
412 | if (st->ss->external) | |
413 | sra->array.level = LEVEL_CONTAINER; | |
ac7de9d9 | 414 | err = add_disk(mdfd, st, sra, &info2); |
8382f19b NB |
415 | if (err < 0 && errno == EBUSY) { |
416 | /* could be another device present with the same | |
417 | * disk.number. Find and reject any such | |
418 | */ | |
419 | find_reject(mdfd, st, sra, info.disk.number, | |
420 | info.events, verbose, chosen_name); | |
ac7de9d9 | 421 | err = add_disk(mdfd, st, sra, &info2); |
8382f19b NB |
422 | } |
423 | if (err < 0) { | |
424 | fprintf(stderr, Name ": failed to add %s to %s: %s.\n", | |
425 | devname, chosen_name, strerror(errno)); | |
15d4a7e4 N |
426 | rv = 2; |
427 | goto out; | |
8382f19b | 428 | } |
c5afc314 N |
429 | info.array.working_disks = 0; |
430 | for (d = sra->devs; d; d=d->next) | |
431 | info.array.working_disks ++; | |
432 | ||
8382f19b | 433 | } |
8382f19b NB |
434 | |
435 | /* 7/ Is there enough devices to possibly start the array? */ | |
436 | /* 7a/ if not, finish with success. */ | |
352452c3 N |
437 | if (info.array.level == LEVEL_CONTAINER) { |
438 | /* Try to assemble within the container */ | |
ad5bc697 | 439 | map_unlock(&map); |
97590376 | 440 | sysfs_uevent(&info, "change"); |
c5afc314 N |
441 | if (verbose >= 0) |
442 | fprintf(stderr, Name | |
443 | ": container %s now has %d devices\n", | |
444 | chosen_name, info.array.working_disks); | |
a7c6e3fb N |
445 | wait_for(chosen_name, mdfd); |
446 | close(mdfd); | |
03b7f6c6 | 447 | rv = Incremental(chosen_name, verbose, runstop, |
0ac91628 | 448 | NULL, homehost, require_homehost, autof); |
03b7f6c6 N |
449 | if (rv == 1) |
450 | /* Don't fail the whole -I if a subarray didn't | |
451 | * have enough devices to start yet | |
452 | */ | |
453 | rv = 0; | |
454 | return rv; | |
352452c3 | 455 | } |
f8409e54 | 456 | avail = NULL; |
8382f19b NB |
457 | active_disks = count_active(st, mdfd, &avail, &info); |
458 | if (enough(info.array.level, info.array.raid_disks, | |
459 | info.array.layout, info.array.state & 1, | |
3288b419 | 460 | avail, active_disks) == 0) { |
8382f19b NB |
461 | free(avail); |
462 | if (verbose >= 0) | |
463 | fprintf(stderr, Name | |
464 | ": %s attached to %s, not enough to start (%d).\n", | |
465 | devname, chosen_name, active_disks); | |
ad5bc697 | 466 | map_unlock(&map); |
15d4a7e4 N |
467 | rv = 0; |
468 | goto out; | |
8382f19b NB |
469 | } |
470 | free(avail); | |
471 | ||
472 | /* 7b/ if yes, */ | |
473 | /* - if number of OK devices match expected, or -R and there */ | |
474 | /* are enough, */ | |
475 | /* + add any bitmap file */ | |
476 | /* + start the array (auto-readonly). */ | |
8382f19b NB |
477 | |
478 | if (ioctl(mdfd, GET_ARRAY_INFO, &ainf) == 0) { | |
479 | if (verbose >= 0) | |
480 | fprintf(stderr, Name | |
481 | ": %s attached to %s which is already active.\n", | |
482 | devname, chosen_name); | |
ad5bc697 | 483 | map_unlock(&map); |
15d4a7e4 N |
484 | rv = 0; |
485 | goto out; | |
8382f19b | 486 | } |
ad5bc697 N |
487 | |
488 | map_unlock(&map); | |
8382f19b | 489 | if (runstop > 0 || active_disks >= info.array.working_disks) { |
7e83544b | 490 | struct mdinfo *sra, *dsk; |
8382f19b NB |
491 | /* Let's try to start it */ |
492 | if (match && match->bitmap_file) { | |
493 | int bmfd = open(match->bitmap_file, O_RDWR); | |
494 | if (bmfd < 0) { | |
495 | fprintf(stderr, Name | |
496 | ": Could not open bitmap file %s.\n", | |
497 | match->bitmap_file); | |
15d4a7e4 | 498 | goto out; |
8382f19b NB |
499 | } |
500 | if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) { | |
501 | close(bmfd); | |
502 | fprintf(stderr, Name | |
503 | ": Failed to set bitmapfile for %s.\n", | |
504 | chosen_name); | |
15d4a7e4 | 505 | goto out; |
8382f19b NB |
506 | } |
507 | close(bmfd); | |
508 | } | |
7e83544b N |
509 | /* GET_* needed so add_disk works below */ |
510 | sra = sysfs_read(mdfd, fd2devnum(mdfd), | |
511 | GET_DEVS|GET_OFFSET|GET_SIZE|GET_STATE); | |
7b403fef | 512 | if ((sra == NULL || active_disks >= info.array.working_disks) |
215bb3f7 | 513 | && trustworthy != FOREIGN) |
8382f19b NB |
514 | rv = ioctl(mdfd, RUN_ARRAY, NULL); |
515 | else | |
516 | rv = sysfs_set_str(sra, NULL, | |
517 | "array_state", "read-auto"); | |
518 | if (rv == 0) { | |
519 | if (verbose >= 0) | |
520 | fprintf(stderr, Name | |
7e83544b | 521 | ": %s attached to %s, which has been started.\n", |
8382f19b NB |
522 | devname, chosen_name); |
523 | rv = 0; | |
a7c6e3fb | 524 | wait_for(chosen_name, mdfd); |
7e83544b N |
525 | /* We just started the array, so some devices |
526 | * might have been evicted from the array | |
527 | * because their event counts were too old. | |
528 | * If the action=re-add policy is in-force for | |
529 | * those devices we should re-add them now. | |
530 | */ | |
531 | for (dsk = sra->devs; dsk ; dsk = dsk->next) { | |
532 | if (disk_action_allows(dsk, st->ss->name, act_re_add) && | |
533 | add_disk(mdfd, st, sra, dsk) == 0) | |
534 | fprintf(stderr, Name | |
535 | ": %s re-added to %s\n", | |
536 | dsk->sys_name, chosen_name); | |
537 | } | |
8382f19b NB |
538 | } else { |
539 | fprintf(stderr, Name | |
540 | ": %s attached to %s, but failed to start: %s.\n", | |
541 | devname, chosen_name, strerror(errno)); | |
542 | rv = 1; | |
543 | } | |
544 | } else { | |
545 | if (verbose >= 0) | |
546 | fprintf(stderr, Name | |
547 | ": %s attached to %s, not enough to start safely.\n", | |
548 | devname, chosen_name); | |
549 | rv = 0; | |
550 | } | |
15d4a7e4 N |
551 | out: |
552 | if (dfd >= 0) | |
553 | close(dfd); | |
554 | if (mdfd >= 0) | |
555 | close(mdfd); | |
7e83544b N |
556 | if (policy) |
557 | dev_policy_free(policy); | |
8382f19b NB |
558 | return rv; |
559 | } | |
560 | ||
fa56eddb | 561 | static struct mddev_ident *search_mdstat(struct supertype *st, |
3a97f210 N |
562 | struct mdinfo *info, |
563 | char *devname, | |
564 | int verbose, int *rvp) | |
565 | { | |
fa56eddb | 566 | struct mddev_ident *array_list, *match; |
3a97f210 N |
567 | array_list = conf_get_ident(NULL); |
568 | match = NULL; | |
569 | for (; array_list; array_list = array_list->next) { | |
570 | if (array_list->uuid_set && | |
571 | same_uuid(array_list->uuid, info->uuid, st->ss->swapuuid) | |
572 | == 0) { | |
573 | if (verbose >= 2 && array_list->devname) | |
574 | fprintf(stderr, Name | |
575 | ": UUID differs from %s.\n", | |
576 | array_list->devname); | |
577 | continue; | |
578 | } | |
579 | if (array_list->name[0] && | |
580 | strcasecmp(array_list->name, info->name) != 0) { | |
581 | if (verbose >= 2 && array_list->devname) | |
582 | fprintf(stderr, Name | |
583 | ": Name differs from %s.\n", | |
584 | array_list->devname); | |
585 | continue; | |
586 | } | |
587 | if (array_list->devices && | |
588 | !match_oneof(array_list->devices, devname)) { | |
589 | if (verbose >= 2 && array_list->devname) | |
590 | fprintf(stderr, Name | |
591 | ": Not a listed device for %s.\n", | |
592 | array_list->devname); | |
593 | continue; | |
594 | } | |
595 | if (array_list->super_minor != UnSet && | |
596 | array_list->super_minor != info->array.md_minor) { | |
597 | if (verbose >= 2 && array_list->devname) | |
598 | fprintf(stderr, Name | |
599 | ": Different super-minor to %s.\n", | |
600 | array_list->devname); | |
601 | continue; | |
602 | } | |
603 | if (!array_list->uuid_set && | |
604 | !array_list->name[0] && | |
605 | !array_list->devices && | |
606 | array_list->super_minor == UnSet) { | |
607 | if (verbose >= 2 && array_list->devname) | |
608 | fprintf(stderr, Name | |
609 | ": %s doesn't have any identifying information.\n", | |
610 | array_list->devname); | |
611 | continue; | |
612 | } | |
613 | /* FIXME, should I check raid_disks and level too?? */ | |
614 | ||
615 | if (match) { | |
616 | if (verbose >= 0) { | |
617 | if (match->devname && array_list->devname) | |
618 | fprintf(stderr, Name | |
619 | ": we match both %s and %s - cannot decide which to use.\n", | |
620 | match->devname, array_list->devname); | |
621 | else | |
622 | fprintf(stderr, Name | |
623 | ": multiple lines in mdadm.conf match\n"); | |
624 | } | |
625 | *rvp = 2; | |
626 | match = NULL; | |
627 | break; | |
628 | } | |
629 | match = array_list; | |
630 | } | |
631 | return match; | |
632 | } | |
633 | ||
7e0f6979 | 634 | static void find_reject(int mdfd, struct supertype *st, struct mdinfo *sra, |
8382f19b NB |
635 | int number, __u64 events, int verbose, |
636 | char *array_name) | |
637 | { | |
3da92f27 | 638 | /* Find a device attached to this array with a disk.number of number |
8382f19b NB |
639 | * and events less than the passed events, and remove the device. |
640 | */ | |
06c7f68e | 641 | struct mdinfo *d; |
8382f19b NB |
642 | mdu_array_info_t ra; |
643 | ||
644 | if (ioctl(mdfd, GET_ARRAY_INFO, &ra) == 0) | |
645 | return; /* not safe to remove from active arrays | |
646 | * without thinking more */ | |
647 | ||
648 | for (d = sra->devs; d ; d = d->next) { | |
649 | char dn[10]; | |
650 | int dfd; | |
8382f19b | 651 | struct mdinfo info; |
06c7f68e | 652 | sprintf(dn, "%d:%d", d->disk.major, d->disk.minor); |
8382f19b NB |
653 | dfd = dev_open(dn, O_RDONLY); |
654 | if (dfd < 0) | |
655 | continue; | |
3da92f27 | 656 | if (st->ss->load_super(st, dfd, NULL)) { |
8382f19b NB |
657 | close(dfd); |
658 | continue; | |
659 | } | |
a5d85af7 | 660 | st->ss->getinfo_super(st, &info, NULL); |
3da92f27 | 661 | st->ss->free_super(st); |
8382f19b NB |
662 | close(dfd); |
663 | ||
664 | if (info.disk.number != number || | |
665 | info.events >= events) | |
666 | continue; | |
667 | ||
06c7f68e | 668 | if (d->disk.raid_disk > -1) |
8382f19b NB |
669 | sysfs_set_str(sra, d, "slot", "none"); |
670 | if (sysfs_set_str(sra, d, "state", "remove") == 0) | |
671 | if (verbose >= 0) | |
672 | fprintf(stderr, Name | |
673 | ": removing old device %s from %s\n", | |
06c7f68e | 674 | d->sys_name+4, array_name); |
8382f19b NB |
675 | } |
676 | } | |
677 | ||
678 | static int count_active(struct supertype *st, int mdfd, char **availp, | |
679 | struct mdinfo *bestinfo) | |
680 | { | |
681 | /* count how many devices in sra think they are active */ | |
06c7f68e | 682 | struct mdinfo *d; |
8382f19b NB |
683 | int cnt = 0, cnt1 = 0; |
684 | __u64 max_events = 0; | |
7e0f6979 | 685 | struct mdinfo *sra = sysfs_read(mdfd, -1, GET_DEVS | GET_STATE); |
8382f19b NB |
686 | char *avail = NULL; |
687 | ||
b526e52d DW |
688 | if (!sra) |
689 | return 0; | |
690 | ||
8382f19b NB |
691 | for (d = sra->devs ; d ; d = d->next) { |
692 | char dn[30]; | |
693 | int dfd; | |
8382f19b NB |
694 | int ok; |
695 | struct mdinfo info; | |
696 | ||
06c7f68e | 697 | sprintf(dn, "%d:%d", d->disk.major, d->disk.minor); |
8382f19b NB |
698 | dfd = dev_open(dn, O_RDONLY); |
699 | if (dfd < 0) | |
700 | continue; | |
3da92f27 | 701 | ok = st->ss->load_super(st, dfd, NULL); |
8382f19b NB |
702 | close(dfd); |
703 | if (ok != 0) | |
704 | continue; | |
a5d85af7 | 705 | st->ss->getinfo_super(st, &info, NULL); |
43aaf431 DL |
706 | if (!avail) { |
707 | avail = malloc(info.array.raid_disks); | |
708 | if (!avail) { | |
709 | fprintf(stderr, Name ": out of memory.\n"); | |
710 | exit(1); | |
711 | } | |
712 | memset(avail, 0, info.array.raid_disks); | |
713 | *availp = avail; | |
714 | } | |
715 | ||
8382f19b NB |
716 | if (info.disk.state & (1<<MD_DISK_SYNC)) |
717 | { | |
8382f19b NB |
718 | if (cnt == 0) { |
719 | cnt++; | |
720 | max_events = info.events; | |
721 | avail[info.disk.raid_disk] = 2; | |
a5d85af7 | 722 | st->ss->getinfo_super(st, bestinfo, NULL); |
8382f19b NB |
723 | } else if (info.events == max_events) { |
724 | cnt++; | |
725 | avail[info.disk.raid_disk] = 2; | |
726 | } else if (info.events == max_events-1) { | |
727 | cnt1++; | |
728 | avail[info.disk.raid_disk] = 1; | |
729 | } else if (info.events < max_events - 1) | |
730 | ; | |
731 | else if (info.events == max_events+1) { | |
732 | int i; | |
733 | cnt1 = cnt; | |
734 | cnt = 1; | |
735 | max_events = info.events; | |
736 | for (i=0; i<info.array.raid_disks; i++) | |
737 | if (avail[i]) | |
738 | avail[i]--; | |
739 | avail[info.disk.raid_disk] = 2; | |
a5d85af7 | 740 | st->ss->getinfo_super(st, bestinfo, NULL); |
8382f19b NB |
741 | } else { /* info.events much bigger */ |
742 | cnt = 1; cnt1 = 0; | |
743 | memset(avail, 0, info.disk.raid_disk); | |
744 | max_events = info.events; | |
1d1a9f87 | 745 | avail[info.disk.raid_disk] = 2; |
a5d85af7 | 746 | st->ss->getinfo_super(st, bestinfo, NULL); |
8382f19b NB |
747 | } |
748 | } | |
3da92f27 | 749 | st->ss->free_super(st); |
8382f19b NB |
750 | } |
751 | return cnt + cnt1; | |
752 | } | |
753 | ||
56e8be85 N |
754 | static int array_try_spare(char *devname, int *dfdp, struct dev_policy *pol, |
755 | struct supertype *st, int verbose) | |
f08605b3 N |
756 | { |
757 | /* This device doesn't have any md metadata | |
758 | * If it is 'bare' and theh device policy allows 'spare' look for | |
759 | * an array or container to attach it to. | |
760 | * If st is set, then only arrays of that type are considered | |
761 | * Return 0 on success, or some exit code on failure, probably 1. | |
762 | */ | |
763 | int rv = -1; | |
f08605b3 N |
764 | struct stat stb; |
765 | struct map_ent *mp, *map = NULL; | |
766 | struct mdinfo *chosen = NULL; | |
767 | int dfd = *dfdp; | |
768 | ||
f08605b3 N |
769 | if (fstat(dfd, &stb) != 0) |
770 | return 1; | |
f08605b3 | 771 | |
56e8be85 | 772 | /* |
f08605b3 N |
773 | * Now we need to find a suitable array to add this to. |
774 | * We only accept arrays that: | |
775 | * - match 'st' | |
776 | * - are in the same domains as the device | |
777 | * - are of an size for which the device will be useful | |
778 | * and we choose the one that is the most degraded | |
779 | */ | |
780 | ||
781 | if (map_lock(&map)) { | |
782 | fprintf(stderr, Name ": failed to get exclusive lock on " | |
783 | "mapfile\n"); | |
784 | return 1; | |
785 | } | |
786 | for (mp = map ; mp ; mp = mp->next) { | |
787 | struct supertype *st2; | |
788 | struct domainlist *dl = NULL; | |
789 | struct mdinfo *sra; | |
790 | unsigned long long devsize; | |
791 | ||
792 | if (is_subarray(mp->metadata)) | |
793 | continue; | |
794 | if (st) { | |
795 | st2 = st->ss->match_metadata_desc(mp->metadata); | |
796 | if (!st2 || | |
797 | (st->minor_version >= 0 && | |
798 | st->minor_version != st2->minor_version)) { | |
799 | if (verbose > 1) | |
800 | fprintf(stderr, Name ": not adding %s to %s as metadata type doesn't match\n", | |
801 | devname, mp->path); | |
802 | free(st2); | |
803 | continue; | |
804 | } | |
805 | free(st2); | |
806 | } | |
807 | sra = sysfs_read(-1, mp->devnum, | |
808 | GET_DEVS|GET_OFFSET|GET_SIZE|GET_STATE| | |
809 | GET_DEGRADED|GET_COMPONENT|GET_VERSION); | |
810 | if (!sra) { | |
811 | /* Probably a container - no degraded info */ | |
812 | sra = sysfs_read(-1, mp->devnum, | |
813 | GET_DEVS|GET_OFFSET|GET_SIZE|GET_STATE| | |
814 | GET_COMPONENT|GET_VERSION); | |
815 | if (sra) | |
816 | sra->array.failed_disks = 0; | |
817 | } | |
818 | if (!sra) | |
819 | continue; | |
820 | if (st == NULL) { | |
821 | int i; | |
822 | st2 = NULL; | |
823 | for(i=0; !st2 && superlist[i]; i++) | |
824 | st2 = superlist[i]->match_metadata_desc( | |
825 | sra->text_version); | |
826 | } else | |
827 | st2 = st; | |
828 | get_dev_size(dfd, NULL, &devsize); | |
829 | if (st2->ss->avail_size(st2, devsize) < sra->component_size) { | |
830 | if (verbose > 1) | |
831 | fprintf(stderr, Name ": not adding %s to %s as it is too small\n", | |
832 | devname, mp->path); | |
833 | goto next; | |
834 | } | |
835 | dl = domain_from_array(sra, st2->ss->name); | |
836 | if (!domain_test(dl, pol, st2->ss->name)) { | |
837 | /* domain test fails */ | |
838 | if (verbose > 1) | |
839 | fprintf(stderr, Name ": not adding %s to %s as it is not in a compatible domain\n", | |
840 | devname, mp->path); | |
841 | ||
842 | goto next; | |
843 | } | |
844 | /* all tests passed, OK to add to this array */ | |
845 | if (!chosen) { | |
846 | chosen = sra; | |
847 | sra = NULL; | |
848 | } else if (chosen->array.failed_disks < sra->array.failed_disks) { | |
849 | sysfs_free(chosen); | |
850 | chosen = sra; | |
851 | sra = NULL; | |
852 | } | |
853 | next: | |
854 | if (sra) | |
855 | sysfs_free(sra); | |
856 | if (st != st2) | |
857 | free(st2); | |
858 | if (dl) | |
859 | domain_free(dl); | |
860 | } | |
861 | if (chosen) { | |
862 | /* add current device to chosen array as a spare */ | |
863 | int mdfd = open_dev(devname2devnum(chosen->sys_name)); | |
864 | if (mdfd >= 0) { | |
a655e550 | 865 | struct mddev_dev devlist; |
f08605b3 N |
866 | char devname[20]; |
867 | devlist.next = NULL; | |
868 | devlist.used = 0; | |
869 | devlist.re_add = 0; | |
870 | devlist.writemostly = 0; | |
871 | devlist.devname = devname; | |
872 | sprintf(devname, "%d:%d", major(stb.st_rdev), | |
873 | minor(stb.st_rdev)); | |
874 | devlist.disposition = 'a'; | |
875 | close(dfd); | |
876 | *dfdp = -1; | |
877 | rv = Manage_subdevs(chosen->sys_name, mdfd, &devlist, | |
878 | -1, 0); | |
879 | close(mdfd); | |
880 | } | |
881 | if (verbose > 0) { | |
882 | if (rv == 0) | |
883 | fprintf(stderr, Name ": added %s as spare for %s\n", | |
884 | devname, chosen->sys_name); | |
885 | else | |
886 | fprintf(stderr, Name ": failed to add %s as spare for %s\n", | |
887 | devname, chosen->sys_name); | |
888 | } | |
889 | sysfs_free(chosen); | |
890 | } | |
891 | return rv ? 0 : 1; | |
892 | } | |
893 | ||
56e8be85 N |
894 | static int partition_try_spare(char *devname, int *dfdp, struct dev_policy *pol, |
895 | struct supertype *st, int verbose) | |
896 | { | |
61018da0 N |
897 | /* we know that at least one partition virtual-metadata is |
898 | * allowed to incorporate spares like this device. We need to | |
899 | * find a suitable device to copy partition information from. | |
900 | * | |
901 | * Getting a list of all disk (not partition) devices is | |
902 | * slightly non-trivial. We could look at /sys/block, but | |
903 | * that is theoretically due to be removed. Maybe best to use | |
904 | * /dev/disk/by-path/?* and ignore names ending '-partNN' as | |
905 | * we depend on this directory of 'path' info. But that fails | |
906 | * to find loop devices and probably others. Maybe don't | |
907 | * worry about that, they aren't the real target. | |
908 | * | |
909 | * So: check things in /dev/disk/by-path to see if they are in | |
910 | * a compatible domain, then load the partition table and see | |
911 | * if it is OK for the new device, and choose the largest | |
912 | * partition table that fits. | |
913 | */ | |
914 | DIR *dir; | |
915 | struct dirent *de; | |
916 | char *chosen = NULL; | |
917 | unsigned long long chosen_size; | |
918 | struct supertype *chosen_st = NULL; | |
919 | int fd; | |
920 | ||
921 | dir = opendir("/dev/disk/by-path"); | |
922 | if (!dir) | |
923 | return 1; | |
924 | while ((de = readdir(dir)) != NULL) { | |
925 | char *ep; | |
926 | struct dev_policy *pol2 = NULL; | |
927 | struct domainlist *domlist = NULL; | |
928 | int fd = -1; | |
929 | struct mdinfo info; | |
930 | struct supertype *st2 = NULL; | |
931 | char *devname = NULL; | |
932 | unsigned long long devsectors; | |
933 | ||
934 | if (de->d_ino == 0 || | |
935 | de->d_name[0] == '.' || | |
936 | (de->d_type != DT_LNK && de->d_type != DT_UNKNOWN)) | |
937 | goto next; | |
938 | ||
939 | ep = de->d_name + strlen(de->d_name); | |
940 | while (ep > de->d_name && | |
941 | isdigit(ep[-1])) | |
942 | ep--; | |
943 | if (ep > de->d_name + 5 && | |
944 | strncmp(ep-5, "-part", 5) == 0) | |
945 | /* This is a partition - skip it */ | |
946 | goto next; | |
947 | ||
948 | pol2 = path_policy(de->d_name, type_disk); | |
949 | ||
950 | domain_merge(&domlist, pol2, st ? st->ss->name : NULL); | |
951 | if (domain_test(domlist, pol, st ? st->ss->name : NULL) == 0) | |
952 | /* new device is incompatible with this device. */ | |
953 | goto next; | |
954 | ||
955 | domain_free(domlist); | |
956 | domlist = NULL; | |
957 | ||
958 | asprintf(&devname, "/dev/disk/by-path/%s", de->d_name); | |
959 | fd = open(devname, O_RDONLY); | |
960 | if (fd < 0) | |
961 | goto next; | |
962 | if (get_dev_size(fd, devname, &devsectors) == 0) | |
963 | goto next; | |
964 | devsectors >>= 9; | |
965 | ||
966 | if (st) | |
967 | st2 = dup_super(st); | |
968 | else | |
969 | st2 = guess_super_type(fd, guess_partitions); | |
970 | if (st2 == NULL || | |
971 | st2->ss->load_super(st2, fd, NULL) < 0) | |
972 | goto next; | |
973 | ||
974 | if (!st) { | |
975 | /* Check domain policy again, this time referring to metadata */ | |
976 | domain_merge(&domlist, pol2, st2->ss->name); | |
977 | if (domain_test(domlist, pol, st2->ss->name) == 0) | |
978 | /* Incompatible devices for this metadata type */ | |
979 | goto next; | |
980 | } | |
981 | ||
a5d85af7 | 982 | st2->ss->getinfo_super(st2, &info, NULL); |
61018da0 N |
983 | if (info.component_size > devsectors) |
984 | /* This partitioning doesn't fit in the device */ | |
985 | goto next; | |
986 | ||
987 | /* This is an acceptable device to copy partition | |
988 | * metadata from. We could just stop here, but I | |
989 | * think I want to keep looking incase a larger | |
990 | * metadata which makes better use of the device can | |
991 | * be found. | |
992 | */ | |
993 | if (chosen == NULL || | |
994 | chosen_size < info.component_size) { | |
995 | chosen_size = info.component_size; | |
996 | free(chosen); | |
997 | chosen = devname; | |
998 | devname = NULL; | |
999 | if (chosen_st) { | |
1000 | chosen_st->ss->free_super(chosen_st); | |
1001 | free(chosen_st); | |
1002 | } | |
1003 | chosen_st = st2; | |
1004 | st2 = NULL; | |
1005 | } | |
1006 | ||
1007 | next: | |
1008 | free(devname); | |
1009 | domain_free(domlist); | |
1010 | dev_policy_free(pol2); | |
1011 | if (st2) | |
1012 | st2->ss->free_super(st2); | |
1013 | free(st2); | |
1014 | ||
1015 | if (fd >= 0) | |
1016 | close(fd); | |
1017 | } | |
1018 | ||
1019 | if (!chosen) | |
1020 | return 1; | |
1021 | ||
1022 | /* 'chosen' is the best device we can find. Let's write its | |
1023 | * metadata to devname dfd is read-only so don't use that | |
1024 | */ | |
1025 | fd = open(devname, O_RDWR); | |
1026 | if (fd >= 0) { | |
1027 | chosen_st->ss->store_super(chosen_st, fd); | |
1028 | close(fd); | |
1029 | } | |
1030 | free(chosen); | |
1031 | chosen_st->ss->free_super(chosen_st); | |
1032 | free(chosen_st); | |
1033 | return 0; | |
56e8be85 N |
1034 | } |
1035 | ||
1036 | ||
1037 | /* adding a spare to a regular array is quite different from adding one to | |
1038 | * a set-of-partitions virtual array. | |
1039 | * This function determines which is worth trying and tries as appropriate. | |
1040 | * Arrays are given priority over partitions. | |
1041 | */ | |
1042 | static int try_spare(char *devname, int *dfdp, struct dev_policy *pol, | |
1043 | struct supertype *st, int verbose) | |
1044 | { | |
1045 | int i; | |
1046 | int rv; | |
1047 | int arrays_ok = 0; | |
1048 | int partitions_ok = 0; | |
1049 | char bufpad[4096 + 4096]; | |
1050 | char *buf = (char*)(((long)bufpad + 4096) & ~4095); | |
1051 | int dfd = *dfdp; | |
1052 | ||
1053 | /* Can only add a spare if device has at least one domains */ | |
1054 | if (pol_find(pol, pol_domain) == NULL) | |
1055 | return 1; | |
1056 | /* And only if some action allows spares */ | |
1057 | if (!policy_action_allows(pol, st?st->ss->name:NULL, act_spare)) | |
1058 | return 1; | |
1059 | ||
1060 | /* Now check if the device is bare - we don't add non-bare devices | |
1061 | * yet even if action=-spare | |
1062 | */ | |
1063 | ||
1064 | if (lseek(dfd, 0, SEEK_SET) != 0 || | |
1065 | read(dfd, buf, 4096) != 4096) { | |
1066 | not_bare: | |
1067 | if (verbose > 1) | |
1068 | fprintf(stderr, Name ": %s is not bare, so not considering as a spare\n", | |
1069 | devname); | |
1070 | return 1; | |
1071 | } | |
1072 | if (buf[0] != '\0' && buf[0] != '\x5a' && buf[0] != '\xff') | |
1073 | goto not_bare; | |
1074 | if (memcmp(buf, buf+1, 4095) != 0) | |
1075 | goto not_bare; | |
1076 | ||
1077 | /* OK, first 4K appear blank, try the end. */ | |
1078 | if (lseek(dfd, -4096, SEEK_END) < 0 || | |
1079 | read(dfd, buf, 4096) != 4096) | |
1080 | goto not_bare; | |
1081 | ||
1082 | if (buf[0] != '\0' && buf[0] != '\x5a' && buf[0] != '\xff') | |
1083 | goto not_bare; | |
1084 | if (memcmp(buf, buf+1, 4095) != 0) | |
1085 | goto not_bare; | |
1086 | ||
1087 | /* This device passes our test for 'is bare'. | |
1088 | * Let's see what policy allows for such things. | |
1089 | */ | |
1090 | if (st) { | |
1091 | /* just try try 'array' or 'partition' based on this metadata */ | |
1092 | if (st->ss->add_to_super) | |
1093 | return array_try_spare(devname, dfdp, pol, | |
1094 | st, verbose); | |
1095 | else | |
1096 | return partition_try_spare(devname, dfdp, pol, | |
1097 | st, verbose); | |
1098 | } | |
1099 | /* Now see which metadata type support spare */ | |
1100 | for (i = 0; (!arrays_ok || !partitions_ok) && superlist[i] ; i++) { | |
1101 | if (superlist[i]->add_to_super && !arrays_ok && | |
1102 | policy_action_allows(pol, superlist[i]->name, act_spare)) | |
1103 | arrays_ok = 1; | |
1104 | if (superlist[i]->add_to_super == NULL && !partitions_ok && | |
1105 | policy_action_allows(pol, superlist[i]->name, act_spare)) | |
1106 | partitions_ok = 1; | |
1107 | } | |
1108 | rv = 0; | |
1109 | if (arrays_ok) | |
1110 | rv = array_try_spare(devname, dfdp, pol, st, verbose); | |
1111 | if (rv == 0 && partitions_ok) | |
1112 | rv = partition_try_spare(devname, dfdp, pol, st, verbose); | |
1113 | return rv; | |
1114 | } | |
1115 | ||
8382f19b NB |
1116 | int IncrementalScan(int verbose) |
1117 | { | |
1118 | /* look at every device listed in the 'map' file. | |
1119 | * If one is found that is not running then: | |
1120 | * look in mdadm.conf for bitmap file. | |
1121 | * if one exists, but array has none, add it. | |
1122 | * try to start array in auto-readonly mode | |
1123 | */ | |
1124 | struct map_ent *mapl = NULL; | |
1125 | struct map_ent *me; | |
fa56eddb | 1126 | struct mddev_ident *devs, *mddev; |
8382f19b NB |
1127 | int rv = 0; |
1128 | ||
1129 | map_read(&mapl); | |
1130 | devs = conf_get_ident(NULL); | |
1131 | ||
1132 | for (me = mapl ; me ; me = me->next) { | |
8382f19b NB |
1133 | mdu_array_info_t array; |
1134 | mdu_bitmap_file_t bmf; | |
7e0f6979 | 1135 | struct mdinfo *sra; |
339c2d6c | 1136 | int mdfd = open_dev(me->devnum); |
215bb3f7 | 1137 | |
8382f19b NB |
1138 | if (mdfd < 0) |
1139 | continue; | |
1140 | if (ioctl(mdfd, GET_ARRAY_INFO, &array) == 0 || | |
1141 | errno != ENODEV) { | |
1142 | close(mdfd); | |
1143 | continue; | |
1144 | } | |
1145 | /* Ok, we can try this one. Maybe it needs a bitmap */ | |
1146 | for (mddev = devs ; mddev ; mddev = mddev->next) | |
339c2d6c | 1147 | if (mddev->devname && me->path |
2400e6eb | 1148 | && devname_matches(mddev->devname, me->path)) |
8382f19b NB |
1149 | break; |
1150 | if (mddev && mddev->bitmap_file) { | |
1151 | /* | |
1152 | * Note: early kernels will wrongly fail this, so it | |
1153 | * is a hint only | |
1154 | */ | |
1155 | int added = -1; | |
1156 | if (ioctl(mdfd, GET_ARRAY_INFO, &bmf) < 0) { | |
1157 | int bmfd = open(mddev->bitmap_file, O_RDWR); | |
1158 | if (bmfd >= 0) { | |
1159 | added = ioctl(mdfd, SET_BITMAP_FILE, | |
1160 | bmfd); | |
1161 | close(bmfd); | |
1162 | } | |
1163 | } | |
1164 | if (verbose >= 0) { | |
1165 | if (added == 0) | |
1166 | fprintf(stderr, Name | |
1167 | ": Added bitmap %s to %s\n", | |
1168 | mddev->bitmap_file, me->path); | |
1169 | else if (errno != EEXIST) | |
1170 | fprintf(stderr, Name | |
1171 | ": Failed to add bitmap to %s: %s\n", | |
1172 | me->path, strerror(errno)); | |
1173 | } | |
1174 | } | |
1175 | sra = sysfs_read(mdfd, 0, 0); | |
1176 | if (sra) { | |
1177 | if (sysfs_set_str(sra, NULL, | |
1178 | "array_state", "read-auto") == 0) { | |
1179 | if (verbose >= 0) | |
1180 | fprintf(stderr, Name | |
1181 | ": started array %s\n", | |
339c2d6c | 1182 | me->path ?: devnum2devname(me->devnum)); |
8382f19b NB |
1183 | } else { |
1184 | fprintf(stderr, Name | |
1185 | ": failed to start array %s: %s\n", | |
339c2d6c N |
1186 | me->path ?: devnum2devname(me->devnum), |
1187 | strerror(errno)); | |
8382f19b NB |
1188 | rv = 1; |
1189 | } | |
1190 | } | |
1191 | } | |
1192 | return rv; | |
1193 | } | |
598f0d58 | 1194 | |
1771a6e2 N |
1195 | static char *container2devname(char *devname) |
1196 | { | |
1197 | char *mdname = NULL; | |
1198 | ||
1199 | if (devname[0] == '/') { | |
1200 | int fd = open(devname, O_RDONLY); | |
1201 | if (fd >= 0) { | |
1202 | mdname = devnum2devname(fd2devnum(fd)); | |
1203 | close(fd); | |
1204 | } | |
1205 | } else { | |
1206 | int uuid[4]; | |
1207 | struct map_ent *mp, *map = NULL; | |
1208 | ||
1209 | if (!parse_uuid(devname, uuid)) | |
1210 | return mdname; | |
1211 | mp = map_by_uuid(&map, uuid); | |
1212 | if (mp) | |
1213 | mdname = devnum2devname(mp->devnum); | |
1214 | map_free(map); | |
1215 | } | |
1216 | ||
1217 | return mdname; | |
1218 | } | |
1219 | ||
47c74f3f N |
1220 | static int Incremental_container(struct supertype *st, char *devname, |
1221 | char *homehost, int verbose, | |
1222 | int runstop, int autof) | |
598f0d58 NB |
1223 | { |
1224 | /* Collect the contents of this container and for each | |
1225 | * array, choose a device name and assemble the array. | |
1226 | */ | |
1227 | ||
47c74f3f | 1228 | struct mdinfo *list; |
598f0d58 | 1229 | struct mdinfo *ra; |
ad5bc697 | 1230 | struct map_ent *map = NULL; |
47c74f3f N |
1231 | struct mdinfo info; |
1232 | int trustworthy; | |
fa56eddb | 1233 | struct mddev_ident *match; |
47c74f3f N |
1234 | int rv = 0; |
1235 | ||
1236 | memset(&info, 0, sizeof(info)); | |
1237 | st->ss->getinfo_super(st, &info, NULL); | |
1238 | ||
1239 | if ((runstop > 0 && info.container_enough >= 0) || | |
1240 | info.container_enough > 0) | |
1241 | /* pass */; | |
1242 | else { | |
1243 | if (verbose) | |
1244 | fprintf(stderr, Name ": not enough devices to start the container\n"); | |
1245 | return 0; | |
1246 | } | |
1247 | ||
1248 | match = search_mdstat(st, &info, devname, verbose, &rv); | |
1249 | if (match == NULL && rv == 2) | |
1250 | return rv; | |
1251 | ||
1252 | /* Need to compute 'trustworthy' */ | |
1253 | if (match) | |
1254 | trustworthy = LOCAL; | |
1255 | else if (st->ss->match_home(st, homehost) == 1) | |
1256 | trustworthy = LOCAL; | |
1257 | else if (st->ss->match_home(st, "any") == 1) | |
1258 | trustworthy = LOCAL; | |
1259 | else | |
1260 | trustworthy = FOREIGN; | |
ad5bc697 | 1261 | |
47c74f3f | 1262 | list = st->ss->container_content(st, NULL); |
93c861ee DL |
1263 | if (map_lock(&map)) |
1264 | fprintf(stderr, Name ": failed to get exclusive lock on " | |
1265 | "mapfile\n"); | |
598f0d58 NB |
1266 | |
1267 | for (ra = list ; ra ; ra = ra->next) { | |
598f0d58 NB |
1268 | int mdfd; |
1269 | char chosen_name[1024]; | |
ad5bc697 | 1270 | struct map_ent *mp; |
fa56eddb | 1271 | struct mddev_ident *match = NULL; |
598f0d58 | 1272 | |
c5afc314 | 1273 | mp = map_by_uuid(&map, ra->uuid); |
d7288ddc | 1274 | |
30926600 N |
1275 | if (mp) { |
1276 | mdfd = open_dev(mp->devnum); | |
339c2d6c N |
1277 | if (mp->path) |
1278 | strcpy(chosen_name, mp->path); | |
1279 | else | |
1280 | strcpy(chosen_name, devnum2devname(mp->devnum)); | |
30926600 | 1281 | } else { |
dbb44303 | 1282 | |
112cace6 | 1283 | /* Check in mdadm.conf for container == devname and |
dbb44303 N |
1284 | * member == ra->text_version after second slash. |
1285 | */ | |
1286 | char *sub = strchr(ra->text_version+1, '/'); | |
fa56eddb | 1287 | struct mddev_ident *array_list; |
dbb44303 N |
1288 | if (sub) { |
1289 | sub++; | |
1290 | array_list = conf_get_ident(NULL); | |
1291 | } else | |
1292 | array_list = NULL; | |
1293 | for(; array_list ; array_list = array_list->next) { | |
dbb44303 N |
1294 | char *dn; |
1295 | if (array_list->member == NULL || | |
1296 | array_list->container == NULL) | |
1297 | continue; | |
1298 | if (strcmp(array_list->member, sub) != 0) | |
1299 | continue; | |
71d60c48 DW |
1300 | if (array_list->uuid_set && |
1301 | !same_uuid(ra->uuid, array_list->uuid, st->ss->swapuuid)) | |
1302 | continue; | |
1771a6e2 N |
1303 | dn = container2devname(array_list->container); |
1304 | if (dn == NULL) | |
dbb44303 | 1305 | continue; |
dbb44303 N |
1306 | if (strncmp(dn, ra->text_version+1, |
1307 | strlen(dn)) != 0 || | |
1308 | ra->text_version[strlen(dn)+1] != '/') { | |
1309 | free(dn); | |
1310 | continue; | |
1311 | } | |
1312 | free(dn); | |
1313 | /* we have a match */ | |
1314 | match = array_list; | |
71d60c48 DW |
1315 | if (verbose>0) |
1316 | fprintf(stderr, Name ": match found for member %s\n", | |
1317 | array_list->member); | |
dbb44303 N |
1318 | break; |
1319 | } | |
dbb44303 | 1320 | |
112cace6 N |
1321 | if (match && match->devname && |
1322 | strcasecmp(match->devname, "<ignore>") == 0) { | |
1323 | if (verbose > 0) | |
1324 | fprintf(stderr, Name ": array %s/%s is " | |
1325 | "explicitly ignored by mdadm.conf\n", | |
1326 | match->container, match->member); | |
1327 | return 2; | |
1328 | } | |
05833051 N |
1329 | if (match) |
1330 | trustworthy = LOCAL; | |
112cace6 | 1331 | |
30926600 N |
1332 | mdfd = create_mddev(match ? match->devname : NULL, |
1333 | ra->name, | |
1334 | autof, | |
1335 | trustworthy, | |
1336 | chosen_name); | |
1337 | } | |
598f0d58 NB |
1338 | |
1339 | if (mdfd < 0) { | |
1340 | fprintf(stderr, Name ": failed to open %s: %s.\n", | |
1341 | chosen_name, strerror(errno)); | |
1342 | return 2; | |
1343 | } | |
1344 | ||
03b7f6c6 N |
1345 | assemble_container_content(st, mdfd, ra, runstop, |
1346 | chosen_name, verbose); | |
598f0d58 | 1347 | } |
ad5bc697 | 1348 | map_unlock(&map); |
598f0d58 NB |
1349 | return 0; |
1350 | } | |
29ba4804 N |
1351 | |
1352 | /* | |
1353 | * IncrementalRemove - Attempt to see if the passed in device belongs to any | |
1354 | * raid arrays, and if so first fail (if needed) and then remove the device. | |
1355 | * | |
1356 | * @devname - The device we want to remove | |
1357 | * | |
1358 | * Note: the device name must be a kernel name like "sda", so | |
1359 | * that we can find it in /proc/mdstat | |
1360 | */ | |
1361 | int IncrementalRemove(char *devname, int verbose) | |
1362 | { | |
1363 | int mdfd; | |
aae3cdc3 | 1364 | int rv; |
29ba4804 | 1365 | struct mdstat_ent *ent; |
a655e550 | 1366 | struct mddev_dev devlist; |
29ba4804 N |
1367 | |
1368 | if (strchr(devname, '/')) { | |
1369 | fprintf(stderr, Name ": incremental removal requires a " | |
1370 | "kernel device name, not a file: %s\n", devname); | |
1371 | return 1; | |
1372 | } | |
1373 | ent = mdstat_by_component(devname); | |
1374 | if (!ent) { | |
1375 | fprintf(stderr, Name ": %s does not appear to be a component " | |
1376 | "of any array\n", devname); | |
1377 | return 1; | |
1378 | } | |
1379 | mdfd = open_dev(ent->devnum); | |
1380 | if (mdfd < 0) { | |
1381 | fprintf(stderr, Name ": Cannot open array %s!!\n", ent->dev); | |
1382 | return 1; | |
1383 | } | |
1384 | memset(&devlist, 0, sizeof(devlist)); | |
1385 | devlist.devname = devname; | |
1386 | devlist.disposition = 'f'; | |
7d2e6486 | 1387 | Manage_subdevs(ent->dev, mdfd, &devlist, verbose, 0); |
29ba4804 | 1388 | devlist.disposition = 'r'; |
aae3cdc3 PC |
1389 | rv = Manage_subdevs(ent->dev, mdfd, &devlist, verbose, 0); |
1390 | close(mdfd); | |
1391 | return rv; | |
29ba4804 | 1392 | } |