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1 | /* | |
2 | * Incremental.c - support --incremental. Part of: | |
3 | * mdadm - manage Linux "md" devices aka RAID arrays. | |
4 | * | |
5 | * Copyright (C) 2006-2013 Neil Brown <neilb@suse.de> | |
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" | |
32 | #include <sys/wait.h> | |
33 | #include <dirent.h> | |
34 | #include <ctype.h> | |
35 | ||
36 | static int count_active(struct supertype *st, struct mdinfo *sra, | |
37 | int mdfd, char **availp, | |
38 | struct mdinfo *info); | |
39 | static void find_reject(int mdfd, struct supertype *st, struct mdinfo *sra, | |
40 | int number, __u64 events, int verbose, | |
41 | char *array_name); | |
42 | static int try_spare(char *devname, int *dfdp, struct dev_policy *pol, | |
43 | struct map_ent *target, | |
44 | struct supertype *st, int verbose); | |
45 | ||
46 | static int Incremental_container(struct supertype *st, char *devname, | |
47 | struct context *c, char *only); | |
48 | ||
49 | int Incremental(struct mddev_dev *devlist, struct context *c, | |
50 | struct supertype *st) | |
51 | { | |
52 | /* Add this device to an array, creating the array if necessary | |
53 | * and starting the array if sensible or - if runstop>0 - if possible. | |
54 | * | |
55 | * This has several steps: | |
56 | * | |
57 | * 1/ Check if device is permitted by mdadm.conf, reject if not. | |
58 | * 2/ Find metadata, reject if none appropriate (check | |
59 | * version/name from args) | |
60 | * 3/ Check if there is a match in mdadm.conf | |
61 | * 3a/ if not, check for homehost match. If no match, assemble as | |
62 | * a 'foreign' array. | |
63 | * 4/ Determine device number. | |
64 | * - If in mdadm.conf with std name, use that | |
65 | * - UUID in /var/run/mdadm.map use that | |
66 | * - If name is suggestive, use that. unless in use with different uuid. | |
67 | * - Choose a free, high number. | |
68 | * - Use a partitioned device unless strong suggestion not to. | |
69 | * e.g. auto=md | |
70 | * Don't choose partitioned for containers. | |
71 | * 5/ Find out if array already exists | |
72 | * 5a/ if it does not | |
73 | * - choose a name, from mdadm.conf or 'name' field in array. | |
74 | * - create the array | |
75 | * - add the device | |
76 | * 5b/ if it does | |
77 | * - check one drive in array to make sure metadata is a reasonably | |
78 | * close match. Reject if not (e.g. different type) | |
79 | * - add the device | |
80 | * 6/ Make sure /var/run/mdadm.map contains this array. | |
81 | * 7/ Is there enough devices to possibly start the array? | |
82 | * For a container, this means running Incremental_container. | |
83 | * 7a/ if not, finish with success. | |
84 | * 7b/ if yes, | |
85 | * - read all metadata and arrange devices like -A does | |
86 | * - if number of OK devices match expected, or -R and there are enough, | |
87 | * start the array (auto-readonly). | |
88 | */ | |
89 | struct stat stb; | |
90 | struct mdinfo info, dinfo; | |
91 | struct mdinfo *sra = NULL, *d; | |
92 | struct mddev_ident *match; | |
93 | char chosen_name[1024]; | |
94 | char *md_devname; | |
95 | int rv = 1; | |
96 | struct map_ent *mp, *map = NULL; | |
97 | int dfd = -1, mdfd = -1; | |
98 | char *avail = NULL; | |
99 | int active_disks; | |
100 | int trustworthy; | |
101 | char *name_to_use; | |
102 | mdu_array_info_t ainf; | |
103 | struct dev_policy *policy = NULL; | |
104 | struct map_ent target_array; | |
105 | int have_target; | |
106 | char *devname = devlist->devname; | |
107 | ||
108 | struct createinfo *ci = conf_get_create_info(); | |
109 | ||
110 | if (stat(devname, &stb) < 0) { | |
111 | if (c->verbose >= 0) | |
112 | pr_err("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 (c->verbose >= 0) | |
118 | pr_err("%s is not a block device.\n", | |
119 | devname); | |
120 | return rv; | |
121 | } | |
122 | dfd = dev_open(devname, O_RDONLY); | |
123 | if (dfd < 0) { | |
124 | if (c->verbose >= 0) | |
125 | pr_err("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 (must_be_container(dfd)) { | |
131 | if (!st) | |
132 | st = super_by_fd(dfd, NULL); | |
133 | if (st) | |
134 | st->ignore_hw_compat = 1; | |
135 | if (st && st->ss->load_container) | |
136 | rv = st->ss->load_container(st, dfd, NULL); | |
137 | ||
138 | close(dfd); | |
139 | if (!rv && st->ss->container_content) { | |
140 | if (map_lock(&map)) | |
141 | pr_err("failed to get " | |
142 | "exclusive lock on mapfile\n"); | |
143 | if (c->export) | |
144 | printf("MD_DEVNAME=%s\n", devname); | |
145 | rv = Incremental_container(st, devname, c, NULL); | |
146 | map_unlock(&map); | |
147 | return rv; | |
148 | } | |
149 | ||
150 | pr_err("%s is not part of an md array.\n", | |
151 | devname); | |
152 | return rv; | |
153 | } | |
154 | ||
155 | /* 1/ Check if device is permitted by mdadm.conf */ | |
156 | ||
157 | for (;devlist; devlist = devlist->next) | |
158 | if (conf_test_dev(devlist->devname)) | |
159 | break; | |
160 | if (!devlist) { | |
161 | devlist = conf_get_devs(); | |
162 | for (;devlist; devlist = devlist->next) { | |
163 | struct stat st2; | |
164 | if (stat(devlist->devname, &st2) == 0 && | |
165 | (st2.st_mode & S_IFMT) == S_IFBLK && | |
166 | st2.st_rdev == stb.st_rdev) | |
167 | break; | |
168 | } | |
169 | } | |
170 | if (!devlist) { | |
171 | if (c->verbose >= 0) | |
172 | pr_err("%s not permitted by mdadm.conf.\n", | |
173 | devname); | |
174 | goto out; | |
175 | } | |
176 | ||
177 | /* 2/ Find metadata, reject if none appropriate (check | |
178 | * version/name from args) */ | |
179 | ||
180 | if (fstat(dfd, &stb) < 0) { | |
181 | if (c->verbose >= 0) | |
182 | pr_err("fstat failed for %s: %s.\n", | |
183 | devname, strerror(errno)); | |
184 | goto out; | |
185 | } | |
186 | if ((stb.st_mode & S_IFMT) != S_IFBLK) { | |
187 | if (c->verbose >= 0) | |
188 | pr_err("%s is not a block device.\n", | |
189 | devname); | |
190 | goto out; | |
191 | } | |
192 | ||
193 | dinfo.disk.major = major(stb.st_rdev); | |
194 | dinfo.disk.minor = minor(stb.st_rdev); | |
195 | ||
196 | policy = disk_policy(&dinfo); | |
197 | have_target = policy_check_path(&dinfo, &target_array); | |
198 | ||
199 | if (st == NULL && (st = guess_super(dfd)) == NULL) { | |
200 | if (c->verbose >= 0) | |
201 | pr_err("no recognisable superblock on %s.\n", | |
202 | devname); | |
203 | rv = try_spare(devname, &dfd, policy, | |
204 | have_target ? &target_array : NULL, | |
205 | st, c->verbose); | |
206 | goto out; | |
207 | } | |
208 | st->ignore_hw_compat = 1; | |
209 | if (st->ss->compare_super == NULL || | |
210 | st->ss->load_super(st, dfd, NULL)) { | |
211 | if (c->verbose >= 0) | |
212 | pr_err("no RAID superblock on %s.\n", | |
213 | devname); | |
214 | rv = try_spare(devname, &dfd, policy, | |
215 | have_target ? &target_array : NULL, | |
216 | st, c->verbose); | |
217 | free(st); | |
218 | goto out; | |
219 | } | |
220 | close (dfd); dfd = -1; | |
221 | ||
222 | st->ss->getinfo_super(st, &info, NULL); | |
223 | ||
224 | /* 3/ Check if there is a match in mdadm.conf */ | |
225 | match = conf_match(st, &info, devname, c->verbose, &rv); | |
226 | if (!match && rv == 2) | |
227 | goto out; | |
228 | ||
229 | if (match && match->devname | |
230 | && strcasecmp(match->devname, "<ignore>") == 0) { | |
231 | if (c->verbose >= 0) | |
232 | pr_err("array containing %s is explicitly" | |
233 | " ignored by mdadm.conf\n", | |
234 | devname); | |
235 | goto out; | |
236 | } | |
237 | ||
238 | /* 3a/ if not, check for homehost match. If no match, continue | |
239 | * but don't trust the 'name' in the array. Thus a 'random' minor | |
240 | * number will be assigned, and the device name will be based | |
241 | * on that. */ | |
242 | if (match) | |
243 | trustworthy = LOCAL; | |
244 | else if (st->ss->match_home(st, c->homehost) == 1) | |
245 | trustworthy = LOCAL; | |
246 | else if (st->ss->match_home(st, "any") == 1) | |
247 | trustworthy = LOCAL_ANY; | |
248 | else | |
249 | trustworthy = FOREIGN; | |
250 | ||
251 | if (!match && !conf_test_metadata(st->ss->name, policy, | |
252 | (trustworthy == LOCAL))) { | |
253 | if (c->verbose >= 1) | |
254 | pr_err("%s has metadata type %s for which " | |
255 | "auto-assembly is disabled\n", | |
256 | devname, st->ss->name); | |
257 | goto out; | |
258 | } | |
259 | if (trustworthy == LOCAL_ANY) | |
260 | trustworthy = LOCAL; | |
261 | ||
262 | /* There are three possible sources for 'autof': command line, | |
263 | * ARRAY line in mdadm.conf, or CREATE line in mdadm.conf. | |
264 | * ARRAY takes precedence, then command line, then | |
265 | * CREATE. | |
266 | */ | |
267 | if (match && match->autof) | |
268 | c->autof = match->autof; | |
269 | if (c->autof == 0) | |
270 | c->autof = ci->autof; | |
271 | ||
272 | name_to_use = info.name; | |
273 | if (name_to_use[0] == 0 && | |
274 | info.array.level == LEVEL_CONTAINER) { | |
275 | name_to_use = info.text_version; | |
276 | trustworthy = METADATA; | |
277 | } | |
278 | if (name_to_use[0] && trustworthy != LOCAL && | |
279 | ! c->require_homehost && | |
280 | conf_name_is_free(name_to_use)) | |
281 | trustworthy = LOCAL; | |
282 | ||
283 | /* strip "hostname:" prefix from name if we have decided | |
284 | * to treat it as LOCAL | |
285 | */ | |
286 | if (trustworthy == LOCAL && strchr(name_to_use, ':') != NULL) | |
287 | name_to_use = strchr(name_to_use, ':')+1; | |
288 | ||
289 | /* 4/ Check if array exists. | |
290 | */ | |
291 | if (map_lock(&map)) | |
292 | pr_err("failed to get exclusive lock on " | |
293 | "mapfile\n"); | |
294 | /* Now check we can get O_EXCL. If not, probably "mdadm -A" has | |
295 | * taken over | |
296 | */ | |
297 | dfd = dev_open(devname, O_RDONLY|O_EXCL); | |
298 | if (dfd < 0) { | |
299 | if (c->verbose >= 0) | |
300 | pr_err("cannot reopen %s: %s.\n", | |
301 | devname, strerror(errno)); | |
302 | goto out_unlock; | |
303 | } | |
304 | /* Cannot hold it open while we add the device to the array, | |
305 | * so we must release the O_EXCL and depend on the map_lock() | |
306 | * So now is the best time to remove any partitions. | |
307 | */ | |
308 | remove_partitions(dfd); | |
309 | close(dfd); | |
310 | dfd = -1; | |
311 | ||
312 | mp = map_by_uuid(&map, info.uuid); | |
313 | if (mp) | |
314 | mdfd = open_dev(mp->devnm); | |
315 | else | |
316 | mdfd = -1; | |
317 | ||
318 | if (mdfd < 0) { | |
319 | ||
320 | /* Couldn't find an existing array, maybe make a new one */ | |
321 | mdfd = create_mddev(match ? match->devname : NULL, | |
322 | name_to_use, c->autof, trustworthy, chosen_name); | |
323 | ||
324 | if (mdfd < 0) | |
325 | goto out_unlock; | |
326 | ||
327 | sysfs_init(&info, mdfd, NULL); | |
328 | ||
329 | if (set_array_info(mdfd, st, &info) != 0) { | |
330 | pr_err("failed to set array info for %s: %s\n", | |
331 | chosen_name, strerror(errno)); | |
332 | rv = 2; | |
333 | goto out_unlock; | |
334 | } | |
335 | ||
336 | dinfo = info; | |
337 | dinfo.disk.major = major(stb.st_rdev); | |
338 | dinfo.disk.minor = minor(stb.st_rdev); | |
339 | if (add_disk(mdfd, st, &info, &dinfo) != 0) { | |
340 | pr_err("failed to add %s to new array %s: %s.\n", | |
341 | devname, chosen_name, strerror(errno)); | |
342 | ioctl(mdfd, STOP_ARRAY, 0); | |
343 | rv = 2; | |
344 | goto out_unlock; | |
345 | } | |
346 | sra = sysfs_read(mdfd, NULL, (GET_DEVS | GET_STATE | | |
347 | GET_OFFSET | GET_SIZE)); | |
348 | ||
349 | if (!sra || !sra->devs || sra->devs->disk.raid_disk >= 0) { | |
350 | /* It really should be 'none' - must be old buggy | |
351 | * kernel, and mdadm -I may not be able to complete. | |
352 | * So reject it. | |
353 | */ | |
354 | ioctl(mdfd, STOP_ARRAY, NULL); | |
355 | pr_err("You have an old buggy kernel which cannot support\n" | |
356 | " --incremental reliably. Aborting.\n"); | |
357 | rv = 2; | |
358 | goto out_unlock; | |
359 | } | |
360 | info.array.working_disks = 1; | |
361 | /* 6/ Make sure /var/run/mdadm.map contains this array. */ | |
362 | map_update(&map, fd2devnm(mdfd), | |
363 | info.text_version, | |
364 | info.uuid, chosen_name); | |
365 | } else { | |
366 | /* 5b/ if it does */ | |
367 | /* - check one drive in array to make sure metadata is a reasonably */ | |
368 | /* close match. Reject if not (e.g. different type) */ | |
369 | /* - add the device */ | |
370 | char dn[20]; | |
371 | int dfd2; | |
372 | int err; | |
373 | struct supertype *st2; | |
374 | struct mdinfo info2, *d; | |
375 | ||
376 | sra = sysfs_read(mdfd, NULL, (GET_DEVS | GET_STATE | | |
377 | GET_OFFSET | GET_SIZE)); | |
378 | ||
379 | if (mp->path) | |
380 | strcpy(chosen_name, mp->path); | |
381 | else | |
382 | strcpy(chosen_name, mp->devnm); | |
383 | ||
384 | /* It is generally not OK to add non-spare drives to a | |
385 | * running array as they are probably missing because | |
386 | * they failed. However if runstop is 1, then the | |
387 | * array was possibly started early and our best bet is | |
388 | * to add this anyway. | |
389 | * Also if action policy is re-add or better we allow | |
390 | * re-add. | |
391 | * This doesn't apply to containers as the 'non-spare' | |
392 | * flag has a different meaning. The test has to happen | |
393 | * at the device level there | |
394 | */ | |
395 | if (!st->ss->external | |
396 | && (info.disk.state & (1<<MD_DISK_SYNC)) != 0 | |
397 | && ! policy_action_allows(policy, st->ss->name, | |
398 | act_re_add) | |
399 | && c->runstop < 1) { | |
400 | if (ioctl(mdfd, GET_ARRAY_INFO, &ainf) == 0) { | |
401 | pr_err("not adding %s to active array (without --run) %s\n", | |
402 | devname, chosen_name); | |
403 | rv = 2; | |
404 | goto out_unlock; | |
405 | } | |
406 | } | |
407 | if (!sra) { | |
408 | rv = 2; | |
409 | goto out_unlock; | |
410 | } | |
411 | if (sra->devs) { | |
412 | sprintf(dn, "%d:%d", sra->devs->disk.major, | |
413 | sra->devs->disk.minor); | |
414 | dfd2 = dev_open(dn, O_RDONLY); | |
415 | if (dfd2 < 0) { | |
416 | pr_err("unable to open %s\n", devname); | |
417 | rv = 2; | |
418 | goto out_unlock; | |
419 | } | |
420 | st2 = dup_super(st); | |
421 | if (st2->ss->load_super(st2, dfd2, NULL) || | |
422 | st->ss->compare_super(st, st2) != 0) { | |
423 | pr_err("metadata mismatch between %s and " | |
424 | "chosen array %s\n", | |
425 | devname, chosen_name); | |
426 | close(dfd2); | |
427 | rv = 2; | |
428 | goto out_unlock; | |
429 | } | |
430 | close(dfd2); | |
431 | st2->ss->getinfo_super(st2, &info2, NULL); | |
432 | st2->ss->free_super(st2); | |
433 | if (info.array.level != info2.array.level || | |
434 | memcmp(info.uuid, info2.uuid, 16) != 0 || | |
435 | info.array.raid_disks != info2.array.raid_disks) { | |
436 | pr_err("unexpected difference between %s and %s.\n", | |
437 | chosen_name, devname); | |
438 | rv = 2; | |
439 | goto out_unlock; | |
440 | } | |
441 | } | |
442 | info.disk.major = major(stb.st_rdev); | |
443 | info.disk.minor = minor(stb.st_rdev); | |
444 | /* add disk needs to know about containers */ | |
445 | if (st->ss->external) | |
446 | sra->array.level = LEVEL_CONTAINER; | |
447 | err = add_disk(mdfd, st, sra, &info); | |
448 | if (err < 0 && errno == EBUSY) { | |
449 | /* could be another device present with the same | |
450 | * disk.number. Find and reject any such | |
451 | */ | |
452 | find_reject(mdfd, st, sra, info.disk.number, | |
453 | info.events, c->verbose, chosen_name); | |
454 | err = add_disk(mdfd, st, sra, &info); | |
455 | } | |
456 | if (err < 0 && errno == EINVAL && | |
457 | info.disk.state & (1<<MD_DISK_SYNC)) { | |
458 | /* Maybe it needs to be added as a spare */ | |
459 | if (policy_action_allows(policy, st->ss->name, | |
460 | act_force_spare)) { | |
461 | info.disk.state &= ~(1<<MD_DISK_SYNC); | |
462 | err = add_disk(mdfd, st, sra, &info); | |
463 | } else | |
464 | if (c->verbose >= 0) | |
465 | pr_err("can only add %s to %s as a spare, and force-spare is not set.\n", | |
466 | devname, chosen_name); | |
467 | } | |
468 | if (err < 0) { | |
469 | pr_err("failed to add %s to existing array %s: %s.\n", | |
470 | devname, chosen_name, strerror(errno)); | |
471 | rv = 2; | |
472 | goto out_unlock; | |
473 | } | |
474 | info.array.working_disks = 0; | |
475 | for (d = sra->devs; d; d=d->next) | |
476 | info.array.working_disks ++; | |
477 | ||
478 | } | |
479 | if (strncmp(chosen_name, "/dev/md/", 8) == 0) | |
480 | md_devname = chosen_name+8; | |
481 | else | |
482 | md_devname = chosen_name; | |
483 | if (c->export) { | |
484 | printf("MD_DEVICE=%s\n", fd2devnm(mdfd)); | |
485 | printf("MD_DEVNAME=%s\n", md_devname); | |
486 | printf("MD_FOREIGN=%s\n", trustworthy == FOREIGN ? "yes" : "no"); | |
487 | } | |
488 | ||
489 | /* 7/ Is there enough devices to possibly start the array? */ | |
490 | /* 7a/ if not, finish with success. */ | |
491 | if (info.array.level == LEVEL_CONTAINER) { | |
492 | char devnm[32]; | |
493 | /* Try to assemble within the container */ | |
494 | sysfs_uevent(sra, "change"); | |
495 | if (!c->export && c->verbose >= 0) | |
496 | pr_err("container %s now has %d device%s\n", | |
497 | chosen_name, info.array.working_disks, | |
498 | info.array.working_disks == 1?"":"s"); | |
499 | wait_for(chosen_name, mdfd); | |
500 | if (st->ss->external) | |
501 | strcpy(devnm, fd2devnm(mdfd)); | |
502 | if (st->ss->load_container) | |
503 | rv = st->ss->load_container(st, mdfd, NULL); | |
504 | close(mdfd); | |
505 | sysfs_free(sra); | |
506 | if (!rv) | |
507 | rv = Incremental_container(st, chosen_name, c, NULL); | |
508 | map_unlock(&map); | |
509 | /* after spare is added, ping monitor for external metadata | |
510 | * so that it can eg. try to rebuild degraded array */ | |
511 | if (st->ss->external) | |
512 | ping_monitor(devnm); | |
513 | return rv; | |
514 | } | |
515 | ||
516 | /* We have added something to the array, so need to re-read the | |
517 | * state. Eventually this state should be kept up-to-date as | |
518 | * things change. | |
519 | */ | |
520 | sysfs_free(sra); | |
521 | sra = sysfs_read(mdfd, NULL, (GET_DEVS | GET_STATE | | |
522 | GET_OFFSET | GET_SIZE)); | |
523 | active_disks = count_active(st, sra, mdfd, &avail, &info); | |
524 | if (enough(info.array.level, info.array.raid_disks, | |
525 | info.array.layout, info.array.state & 1, | |
526 | avail) == 0) { | |
527 | if (c->export) { | |
528 | printf("MD_STARTED=no\n"); | |
529 | } else if (c->verbose >= 0) | |
530 | pr_err("%s attached to %s, not enough to start (%d).\n", | |
531 | devname, chosen_name, active_disks); | |
532 | rv = 0; | |
533 | goto out_unlock; | |
534 | } | |
535 | ||
536 | /* 7b/ if yes, */ | |
537 | /* - if number of OK devices match expected, or -R and there */ | |
538 | /* are enough, */ | |
539 | /* + add any bitmap file */ | |
540 | /* + start the array (auto-readonly). */ | |
541 | ||
542 | if (ioctl(mdfd, GET_ARRAY_INFO, &ainf) == 0) { | |
543 | if (c->export) { | |
544 | printf("MD_STARTED=already\n"); | |
545 | } else if (c->verbose >= 0) | |
546 | pr_err("%s attached to %s which is already active.\n", | |
547 | devname, chosen_name); | |
548 | rv = 0; | |
549 | goto out_unlock; | |
550 | } | |
551 | ||
552 | map_unlock(&map); | |
553 | if (c->runstop > 0 || active_disks >= info.array.working_disks) { | |
554 | struct mdinfo *dsk; | |
555 | /* Let's try to start it */ | |
556 | ||
557 | if (info.reshape_active && !(info.reshape_active & RESHAPE_NO_BACKUP)) { | |
558 | pr_err("%s: This array is being reshaped and cannot be started\n", | |
559 | chosen_name); | |
560 | cont_err("by --incremental. Please use --assemble\n"); | |
561 | goto out; | |
562 | } | |
563 | if (match && match->bitmap_file) { | |
564 | int bmfd = open(match->bitmap_file, O_RDWR); | |
565 | if (bmfd < 0) { | |
566 | pr_err("Could not open bitmap file %s.\n", | |
567 | match->bitmap_file); | |
568 | goto out; | |
569 | } | |
570 | if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) { | |
571 | close(bmfd); | |
572 | pr_err("Failed to set bitmapfile for %s.\n", | |
573 | chosen_name); | |
574 | goto out; | |
575 | } | |
576 | close(bmfd); | |
577 | } | |
578 | /* Need to remove from the array any devices which | |
579 | * 'count_active' discerned were too old or inappropriate | |
580 | */ | |
581 | for (d = sra ? sra->devs : NULL ; d ; d = d->next) | |
582 | if (d->disk.state & (1<<MD_DISK_REMOVED)) | |
583 | remove_disk(mdfd, st, sra, d); | |
584 | ||
585 | if ((sra == NULL || active_disks >= info.array.working_disks) | |
586 | && trustworthy != FOREIGN) | |
587 | rv = ioctl(mdfd, RUN_ARRAY, NULL); | |
588 | else | |
589 | rv = sysfs_set_str(sra, NULL, | |
590 | "array_state", "read-auto"); | |
591 | /* Array might be O_EXCL which will interfere with | |
592 | * fsck and mount. So re-open without O_EXCL. | |
593 | */ | |
594 | reopen_mddev(mdfd); | |
595 | if (rv == 0) { | |
596 | if (c->export) { | |
597 | printf("MD_STARTED=yes\n"); | |
598 | } else if (c->verbose >= 0) | |
599 | pr_err("%s attached to %s, which has been started.\n", | |
600 | devname, chosen_name); | |
601 | rv = 0; | |
602 | wait_for(chosen_name, mdfd); | |
603 | /* We just started the array, so some devices | |
604 | * might have been evicted from the array | |
605 | * because their event counts were too old. | |
606 | * If the action=re-add policy is in-force for | |
607 | * those devices we should re-add them now. | |
608 | */ | |
609 | for (dsk = sra->devs; dsk ; dsk = dsk->next) { | |
610 | if (disk_action_allows(dsk, st->ss->name, act_re_add) && | |
611 | add_disk(mdfd, st, sra, dsk) == 0) | |
612 | pr_err("%s re-added to %s\n", | |
613 | dsk->sys_name, chosen_name); | |
614 | } | |
615 | } else { | |
616 | pr_err("%s attached to %s, but failed to start: %s.\n", | |
617 | devname, chosen_name, strerror(errno)); | |
618 | rv = 1; | |
619 | } | |
620 | } else { | |
621 | if (c->export) { | |
622 | printf("MD_STARTED=unsafe\n"); | |
623 | } else if (c->verbose >= 0) | |
624 | pr_err("%s attached to %s, not enough to start safely.\n", | |
625 | devname, chosen_name); | |
626 | rv = 0; | |
627 | } | |
628 | out: | |
629 | free(avail); | |
630 | if (dfd >= 0) | |
631 | close(dfd); | |
632 | if (mdfd >= 0) | |
633 | close(mdfd); | |
634 | if (policy) | |
635 | dev_policy_free(policy); | |
636 | if (sra) | |
637 | sysfs_free(sra); | |
638 | return rv; | |
639 | out_unlock: | |
640 | map_unlock(&map); | |
641 | goto out; | |
642 | } | |
643 | ||
644 | static void find_reject(int mdfd, struct supertype *st, struct mdinfo *sra, | |
645 | int number, __u64 events, int verbose, | |
646 | char *array_name) | |
647 | { | |
648 | /* Find a device attached to this array with a disk.number of number | |
649 | * and events less than the passed events, and remove the device. | |
650 | */ | |
651 | struct mdinfo *d; | |
652 | mdu_array_info_t ra; | |
653 | ||
654 | if (ioctl(mdfd, GET_ARRAY_INFO, &ra) == 0) | |
655 | return; /* not safe to remove from active arrays | |
656 | * without thinking more */ | |
657 | ||
658 | for (d = sra->devs; d ; d = d->next) { | |
659 | char dn[10]; | |
660 | int dfd; | |
661 | struct mdinfo info; | |
662 | sprintf(dn, "%d:%d", d->disk.major, d->disk.minor); | |
663 | dfd = dev_open(dn, O_RDONLY); | |
664 | if (dfd < 0) | |
665 | continue; | |
666 | if (st->ss->load_super(st, dfd, NULL)) { | |
667 | close(dfd); | |
668 | continue; | |
669 | } | |
670 | st->ss->getinfo_super(st, &info, NULL); | |
671 | st->ss->free_super(st); | |
672 | close(dfd); | |
673 | ||
674 | if (info.disk.number != number || | |
675 | info.events >= events) | |
676 | continue; | |
677 | ||
678 | if (d->disk.raid_disk > -1) | |
679 | sysfs_set_str(sra, d, "slot", "none"); | |
680 | if (sysfs_set_str(sra, d, "state", "remove") == 0) | |
681 | if (verbose >= 0) | |
682 | pr_err("removing old device %s from %s\n", | |
683 | d->sys_name+4, array_name); | |
684 | } | |
685 | } | |
686 | ||
687 | static int count_active(struct supertype *st, struct mdinfo *sra, | |
688 | int mdfd, char **availp, | |
689 | struct mdinfo *bestinfo) | |
690 | { | |
691 | /* count how many devices in sra think they are active */ | |
692 | struct mdinfo *d; | |
693 | int cnt = 0; | |
694 | int replcnt = 0; | |
695 | __u64 max_events = 0; | |
696 | char *avail = NULL; | |
697 | int *best = NULL; | |
698 | char *devmap = NULL; | |
699 | int numdevs = 0; | |
700 | int devnum; | |
701 | int b, i; | |
702 | int raid_disks = 0; | |
703 | ||
704 | if (!sra) | |
705 | return 0; | |
706 | ||
707 | for (d = sra->devs ; d ; d = d->next) | |
708 | numdevs++; | |
709 | for (d = sra->devs, devnum = 0 ; d ; d = d->next, devnum++) { | |
710 | char dn[30]; | |
711 | int dfd; | |
712 | int ok; | |
713 | struct mdinfo info; | |
714 | ||
715 | sprintf(dn, "%d:%d", d->disk.major, d->disk.minor); | |
716 | dfd = dev_open(dn, O_RDONLY); | |
717 | if (dfd < 0) | |
718 | continue; | |
719 | ok = st->ss->load_super(st, dfd, NULL); | |
720 | close(dfd); | |
721 | if (ok != 0) | |
722 | continue; | |
723 | info.array.raid_disks = raid_disks; | |
724 | st->ss->getinfo_super(st, &info, devmap + raid_disks * devnum); | |
725 | if (!avail) { | |
726 | raid_disks = info.array.raid_disks; | |
727 | avail = xcalloc(raid_disks, 1); | |
728 | *availp = avail; | |
729 | ||
730 | best = xcalloc(raid_disks, sizeof(int)); | |
731 | devmap = xcalloc(raid_disks, numdevs); | |
732 | ||
733 | st->ss->getinfo_super(st, &info, devmap); | |
734 | } | |
735 | ||
736 | if (info.disk.state & (1<<MD_DISK_SYNC)) | |
737 | { | |
738 | if (cnt == 0) { | |
739 | cnt++; | |
740 | max_events = info.events; | |
741 | avail[info.disk.raid_disk] = 2; | |
742 | best[info.disk.raid_disk] = devnum; | |
743 | st->ss->getinfo_super(st, bestinfo, NULL); | |
744 | } else if (info.events == max_events) { | |
745 | avail[info.disk.raid_disk] = 2; | |
746 | best[info.disk.raid_disk] = devnum; | |
747 | } else if (info.events == max_events-1) { | |
748 | if (avail[info.disk.raid_disk] == 0) { | |
749 | avail[info.disk.raid_disk] = 1; | |
750 | best[info.disk.raid_disk] = devnum; | |
751 | } | |
752 | } else if (info.events < max_events - 1) | |
753 | ; | |
754 | else if (info.events == max_events+1) { | |
755 | int i; | |
756 | max_events = info.events; | |
757 | for (i = 0; i < raid_disks; i++) | |
758 | if (avail[i]) | |
759 | avail[i]--; | |
760 | avail[info.disk.raid_disk] = 2; | |
761 | best[info.disk.raid_disk] = devnum; | |
762 | st->ss->getinfo_super(st, bestinfo, NULL); | |
763 | } else { /* info.events much bigger */ | |
764 | memset(avail, 0, raid_disks); | |
765 | max_events = info.events; | |
766 | avail[info.disk.raid_disk] = 2; | |
767 | best[info.disk.raid_disk] = devnum; | |
768 | st->ss->getinfo_super(st, bestinfo, NULL); | |
769 | } | |
770 | } else if (info.disk.state & (1<<MD_DISK_REPLACEMENT)) | |
771 | replcnt++; | |
772 | st->ss->free_super(st); | |
773 | } | |
774 | if (!avail) | |
775 | return 0; | |
776 | /* We need to reject any device that thinks the best device is | |
777 | * failed or missing */ | |
778 | for (b = 0; b < raid_disks; b++) | |
779 | if (avail[b] == 2) | |
780 | break; | |
781 | cnt = 0; | |
782 | for (i = 0 ; i < raid_disks ; i++) { | |
783 | if (i != b && avail[i]) | |
784 | if (devmap[raid_disks * best[i] + b] == 0) { | |
785 | /* This device thinks 'b' is failed - | |
786 | * don't use it */ | |
787 | devnum = best[i]; | |
788 | for (d=sra->devs ; devnum; d = d->next) | |
789 | devnum--; | |
790 | d->disk.state |= (1 << MD_DISK_REMOVED); | |
791 | avail[i] = 0; | |
792 | } | |
793 | if (avail[i]) | |
794 | cnt++; | |
795 | } | |
796 | /* Also need to reject any spare device with an event count that | |
797 | * is too high | |
798 | */ | |
799 | for (d = sra->devs; d; d = d->next) { | |
800 | if (!(d->disk.state & (1<<MD_DISK_SYNC)) && | |
801 | d->events > max_events) | |
802 | d->disk.state |= (1 << MD_DISK_REMOVED); | |
803 | } | |
804 | free(best); | |
805 | free(devmap); | |
806 | return cnt + replcnt; | |
807 | } | |
808 | ||
809 | /* test if container has degraded member(s) */ | |
810 | static int container_members_max_degradation(struct map_ent *map, struct map_ent *me) | |
811 | { | |
812 | mdu_array_info_t array; | |
813 | int afd; | |
814 | int max_degraded = 0; | |
815 | ||
816 | for(; map; map = map->next) { | |
817 | if (!metadata_container_matches(map->metadata, me->devnm)) | |
818 | continue; | |
819 | afd = open_dev(map->devnm); | |
820 | if (afd < 0) | |
821 | continue; | |
822 | /* most accurate information regarding array degradation */ | |
823 | if (ioctl(afd, GET_ARRAY_INFO, &array) >= 0) { | |
824 | int degraded = array.raid_disks - array.active_disks - | |
825 | array.spare_disks; | |
826 | if (degraded > max_degraded) | |
827 | max_degraded = degraded; | |
828 | } | |
829 | close(afd); | |
830 | } | |
831 | return (max_degraded); | |
832 | } | |
833 | ||
834 | static int array_try_spare(char *devname, int *dfdp, struct dev_policy *pol, | |
835 | struct map_ent *target, int bare, | |
836 | struct supertype *st, int verbose) | |
837 | { | |
838 | /* This device doesn't have any md metadata | |
839 | * The device policy allows 'spare' and if !bare, it allows spare-same-slot. | |
840 | * If 'st' is not set, then we only know that some metadata allows this, | |
841 | * others possibly don't. | |
842 | * So look for a container or array to attach the device to. | |
843 | * Prefer 'target' if that is set and the array is found. | |
844 | * | |
845 | * If st is set, then only arrays of that type are considered | |
846 | * Return 0 on success, or some exit code on failure, probably 1. | |
847 | */ | |
848 | int rv = 1; | |
849 | struct stat stb; | |
850 | struct map_ent *mp, *map = NULL; | |
851 | struct mdinfo *chosen = NULL; | |
852 | int dfd = *dfdp; | |
853 | ||
854 | if (fstat(dfd, &stb) != 0) | |
855 | return 1; | |
856 | ||
857 | /* | |
858 | * Now we need to find a suitable array to add this to. | |
859 | * We only accept arrays that: | |
860 | * - match 'st' | |
861 | * - are in the same domains as the device | |
862 | * - are of an size for which the device will be useful | |
863 | * and we choose the one that is the most degraded | |
864 | */ | |
865 | ||
866 | if (map_lock(&map)) { | |
867 | pr_err("failed to get exclusive lock on " | |
868 | "mapfile\n"); | |
869 | return 1; | |
870 | } | |
871 | for (mp = map ; mp ; mp = mp->next) { | |
872 | struct supertype *st2; | |
873 | struct domainlist *dl = NULL; | |
874 | struct mdinfo *sra; | |
875 | unsigned long long devsize; | |
876 | unsigned long long component_size = 0; | |
877 | ||
878 | if (is_subarray(mp->metadata)) | |
879 | continue; | |
880 | if (st) { | |
881 | st2 = st->ss->match_metadata_desc(mp->metadata); | |
882 | if (!st2 || | |
883 | (st->minor_version >= 0 && | |
884 | st->minor_version != st2->minor_version)) { | |
885 | if (verbose > 1) | |
886 | pr_err("not adding %s to %s as metadata type doesn't match\n", | |
887 | devname, mp->path); | |
888 | free(st2); | |
889 | continue; | |
890 | } | |
891 | free(st2); | |
892 | } | |
893 | sra = sysfs_read(-1, mp->devnm, | |
894 | GET_DEVS|GET_OFFSET|GET_SIZE|GET_STATE| | |
895 | GET_DEGRADED|GET_COMPONENT|GET_VERSION); | |
896 | if (!sra) { | |
897 | /* Probably a container - no degraded info */ | |
898 | sra = sysfs_read(-1, mp->devnm, | |
899 | GET_DEVS|GET_OFFSET|GET_SIZE|GET_STATE| | |
900 | GET_COMPONENT|GET_VERSION); | |
901 | if (sra) | |
902 | sra->array.failed_disks = -1; | |
903 | } | |
904 | if (!sra) | |
905 | continue; | |
906 | if (st == NULL) { | |
907 | int i; | |
908 | st2 = NULL; | |
909 | for(i = 0; !st2 && superlist[i]; i++) | |
910 | st2 = superlist[i]->match_metadata_desc( | |
911 | sra->text_version); | |
912 | if (!st2) { | |
913 | if (verbose > 1) | |
914 | pr_err("not adding %s to %s" | |
915 | " as metadata not recognised.\n", | |
916 | devname, mp->path); | |
917 | goto next; | |
918 | } | |
919 | /* Need to double check the 'act_spare' permissions applies | |
920 | * to this metadata. | |
921 | */ | |
922 | if (!policy_action_allows(pol, st2->ss->name, act_spare)) | |
923 | goto next; | |
924 | if (!bare && !policy_action_allows(pol, st2->ss->name, | |
925 | act_spare_same_slot)) | |
926 | goto next; | |
927 | } else | |
928 | st2 = st; | |
929 | /* update number of failed disks for mostly degraded | |
930 | * container member */ | |
931 | if (sra->array.failed_disks == -1) | |
932 | sra->array.failed_disks = container_members_max_degradation(map, mp); | |
933 | ||
934 | get_dev_size(dfd, NULL, &devsize); | |
935 | if (sra->component_size == 0) { | |
936 | /* true for containers, here we must read superblock | |
937 | * to obtain minimum spare size */ | |
938 | struct supertype *st3 = dup_super(st2); | |
939 | int mdfd = open_dev(mp->devnm); | |
940 | if (mdfd < 0) { | |
941 | free(st3); | |
942 | goto next; | |
943 | } | |
944 | if (st3->ss->load_container && | |
945 | !st3->ss->load_container(st3, mdfd, mp->path)) { | |
946 | component_size = st3->ss->min_acceptable_spare_size(st3); | |
947 | st3->ss->free_super(st3); | |
948 | } | |
949 | free(st3); | |
950 | close(mdfd); | |
951 | } | |
952 | if ((sra->component_size > 0 && | |
953 | st2->ss->avail_size(st2, devsize, | |
954 | sra->devs | |
955 | ? sra->devs->data_offset | |
956 | : INVALID_SECTORS) | |
957 | < sra->component_size) | |
958 | || | |
959 | (sra->component_size == 0 && devsize < component_size)) { | |
960 | if (verbose > 1) | |
961 | pr_err("not adding %s to %s as it is too small\n", | |
962 | devname, mp->path); | |
963 | goto next; | |
964 | } | |
965 | /* test against target. | |
966 | * If 'target' is set and 'bare' is false, we only accept | |
967 | * arrays/containers that match 'target'. | |
968 | * If 'target' is set and 'bare' is true, we prefer the | |
969 | * array which matches 'target'. | |
970 | * target is considered only if we deal with degraded array | |
971 | */ | |
972 | if (target && policy_action_allows(pol, st2->ss->name, | |
973 | act_spare_same_slot)) { | |
974 | if (strcmp(target->metadata, mp->metadata) == 0 && | |
975 | memcmp(target->uuid, mp->uuid, | |
976 | sizeof(target->uuid)) == 0 && | |
977 | sra->array.failed_disks > 0) { | |
978 | /* This is our target!! */ | |
979 | if (chosen) | |
980 | sysfs_free(chosen); | |
981 | chosen = sra; | |
982 | sra = NULL; | |
983 | /* skip to end so we don't check any more */ | |
984 | while (mp->next) | |
985 | mp = mp->next; | |
986 | goto next; | |
987 | } | |
988 | /* not our target */ | |
989 | if (!bare) | |
990 | goto next; | |
991 | } | |
992 | ||
993 | dl = domain_from_array(sra, st2->ss->name); | |
994 | if (domain_test(dl, pol, st2->ss->name) != 1) { | |
995 | /* domain test fails */ | |
996 | if (verbose > 1) | |
997 | pr_err("not adding %s to %s as" | |
998 | " it is not in a compatible domain\n", | |
999 | devname, mp->path); | |
1000 | ||
1001 | goto next; | |
1002 | } | |
1003 | /* all tests passed, OK to add to this array */ | |
1004 | if (!chosen) { | |
1005 | chosen = sra; | |
1006 | sra = NULL; | |
1007 | } else if (chosen->array.failed_disks < sra->array.failed_disks) { | |
1008 | sysfs_free(chosen); | |
1009 | chosen = sra; | |
1010 | sra = NULL; | |
1011 | } | |
1012 | next: | |
1013 | if (sra) | |
1014 | sysfs_free(sra); | |
1015 | if (st != st2) | |
1016 | free(st2); | |
1017 | if (dl) | |
1018 | domain_free(dl); | |
1019 | } | |
1020 | if (chosen) { | |
1021 | /* add current device to chosen array as a spare */ | |
1022 | int mdfd = open_dev(chosen->sys_name); | |
1023 | if (mdfd >= 0) { | |
1024 | struct mddev_dev devlist; | |
1025 | char devname[20]; | |
1026 | devlist.next = NULL; | |
1027 | devlist.used = 0; | |
1028 | devlist.writemostly = 0; | |
1029 | devlist.devname = devname; | |
1030 | sprintf(devname, "%d:%d", major(stb.st_rdev), | |
1031 | minor(stb.st_rdev)); | |
1032 | devlist.disposition = 'a'; | |
1033 | close(dfd); | |
1034 | *dfdp = -1; | |
1035 | rv = Manage_subdevs(chosen->sys_name, mdfd, &devlist, | |
1036 | -1, 0, NULL, 0); | |
1037 | close(mdfd); | |
1038 | } | |
1039 | if (verbose > 0) { | |
1040 | if (rv == 0) | |
1041 | pr_err("added %s as spare for %s\n", | |
1042 | devname, chosen->sys_name); | |
1043 | else | |
1044 | pr_err("failed to add %s as spare for %s\n", | |
1045 | devname, chosen->sys_name); | |
1046 | } | |
1047 | sysfs_free(chosen); | |
1048 | } | |
1049 | map_unlock(&map); | |
1050 | return rv; | |
1051 | } | |
1052 | ||
1053 | static int partition_try_spare(char *devname, int *dfdp, struct dev_policy *pol, | |
1054 | struct supertype *st, int verbose) | |
1055 | { | |
1056 | /* we know that at least one partition virtual-metadata is | |
1057 | * allowed to incorporate spares like this device. We need to | |
1058 | * find a suitable device to copy partition information from. | |
1059 | * | |
1060 | * Getting a list of all disk (not partition) devices is | |
1061 | * slightly non-trivial. We could look at /sys/block, but | |
1062 | * that is theoretically due to be removed. Maybe best to use | |
1063 | * /dev/disk/by-path/?* and ignore names ending '-partNN' as | |
1064 | * we depend on this directory of 'path' info. But that fails | |
1065 | * to find loop devices and probably others. Maybe don't | |
1066 | * worry about that, they aren't the real target. | |
1067 | * | |
1068 | * So: check things in /dev/disk/by-path to see if they are in | |
1069 | * a compatible domain, then load the partition table and see | |
1070 | * if it is OK for the new device, and choose the largest | |
1071 | * partition table that fits. | |
1072 | */ | |
1073 | DIR *dir; | |
1074 | struct dirent *de; | |
1075 | char *chosen = NULL; | |
1076 | unsigned long long chosen_size = 0; | |
1077 | struct supertype *chosen_st = NULL; | |
1078 | int fd; | |
1079 | ||
1080 | dir = opendir("/dev/disk/by-path"); | |
1081 | if (!dir) | |
1082 | return 1; | |
1083 | while ((de = readdir(dir)) != NULL) { | |
1084 | char *ep; | |
1085 | struct dev_policy *pol2 = NULL; | |
1086 | struct domainlist *domlist = NULL; | |
1087 | int fd = -1; | |
1088 | struct mdinfo info; | |
1089 | struct supertype *st2 = NULL; | |
1090 | char *devname = NULL; | |
1091 | unsigned long long devsectors; | |
1092 | ||
1093 | if (de->d_ino == 0 || | |
1094 | de->d_name[0] == '.' || | |
1095 | (de->d_type != DT_LNK && de->d_type != DT_UNKNOWN)) | |
1096 | goto next; | |
1097 | ||
1098 | ep = de->d_name + strlen(de->d_name); | |
1099 | while (ep > de->d_name && | |
1100 | isdigit(ep[-1])) | |
1101 | ep--; | |
1102 | if (ep > de->d_name + 5 && | |
1103 | strncmp(ep-5, "-part", 5) == 0) | |
1104 | /* This is a partition - skip it */ | |
1105 | goto next; | |
1106 | ||
1107 | pol2 = path_policy(de->d_name, type_disk); | |
1108 | ||
1109 | domain_merge(&domlist, pol2, st ? st->ss->name : NULL); | |
1110 | if (domain_test(domlist, pol, st ? st->ss->name : NULL) != 1) | |
1111 | /* new device is incompatible with this device. */ | |
1112 | goto next; | |
1113 | ||
1114 | domain_free(domlist); | |
1115 | domlist = NULL; | |
1116 | ||
1117 | if (asprintf(&devname, "/dev/disk/by-path/%s", de->d_name) != 1) { | |
1118 | devname = NULL; | |
1119 | goto next; | |
1120 | } | |
1121 | fd = open(devname, O_RDONLY); | |
1122 | if (fd < 0) | |
1123 | goto next; | |
1124 | if (get_dev_size(fd, devname, &devsectors) == 0) | |
1125 | goto next; | |
1126 | devsectors >>= 9; | |
1127 | ||
1128 | if (st) | |
1129 | st2 = dup_super(st); | |
1130 | else | |
1131 | st2 = guess_super_type(fd, guess_partitions); | |
1132 | if (st2 == NULL || | |
1133 | st2->ss->load_super(st2, fd, NULL) < 0) | |
1134 | goto next; | |
1135 | ||
1136 | if (!st) { | |
1137 | /* Check domain policy again, this time referring to metadata */ | |
1138 | domain_merge(&domlist, pol2, st2->ss->name); | |
1139 | if (domain_test(domlist, pol, st2->ss->name) != 1) | |
1140 | /* Incompatible devices for this metadata type */ | |
1141 | goto next; | |
1142 | if (!policy_action_allows(pol, st2->ss->name, act_spare)) | |
1143 | /* Some partition types allow sparing, but not | |
1144 | * this one. | |
1145 | */ | |
1146 | goto next; | |
1147 | } | |
1148 | ||
1149 | st2->ss->getinfo_super(st2, &info, NULL); | |
1150 | if (info.component_size > devsectors) | |
1151 | /* This partitioning doesn't fit in the device */ | |
1152 | goto next; | |
1153 | ||
1154 | /* This is an acceptable device to copy partition | |
1155 | * metadata from. We could just stop here, but I | |
1156 | * think I want to keep looking incase a larger | |
1157 | * metadata which makes better use of the device can | |
1158 | * be found. | |
1159 | */ | |
1160 | if (chosen == NULL || | |
1161 | chosen_size < info.component_size) { | |
1162 | chosen_size = info.component_size; | |
1163 | free(chosen); | |
1164 | chosen = devname; | |
1165 | devname = NULL; | |
1166 | if (chosen_st) { | |
1167 | chosen_st->ss->free_super(chosen_st); | |
1168 | free(chosen_st); | |
1169 | } | |
1170 | chosen_st = st2; | |
1171 | st2 = NULL; | |
1172 | } | |
1173 | ||
1174 | next: | |
1175 | free(devname); | |
1176 | domain_free(domlist); | |
1177 | dev_policy_free(pol2); | |
1178 | if (st2) | |
1179 | st2->ss->free_super(st2); | |
1180 | free(st2); | |
1181 | ||
1182 | if (fd >= 0) | |
1183 | close(fd); | |
1184 | } | |
1185 | ||
1186 | closedir(dir); | |
1187 | ||
1188 | if (!chosen) | |
1189 | return 1; | |
1190 | ||
1191 | /* 'chosen' is the best device we can find. Let's write its | |
1192 | * metadata to devname dfd is read-only so don't use that | |
1193 | */ | |
1194 | fd = open(devname, O_RDWR); | |
1195 | if (fd >= 0) { | |
1196 | chosen_st->ss->store_super(chosen_st, fd); | |
1197 | close(fd); | |
1198 | } | |
1199 | free(chosen); | |
1200 | chosen_st->ss->free_super(chosen_st); | |
1201 | free(chosen_st); | |
1202 | return 0; | |
1203 | } | |
1204 | ||
1205 | static int is_bare(int dfd) | |
1206 | { | |
1207 | unsigned long long size = 0; | |
1208 | char bufpad[4096 + 4096]; | |
1209 | char *buf = (char*)(((long)bufpad + 4096) & ~4095); | |
1210 | ||
1211 | if (lseek(dfd, 0, SEEK_SET) != 0 || | |
1212 | read(dfd, buf, 4096) != 4096) | |
1213 | return 0; | |
1214 | ||
1215 | if (buf[0] != '\0' && buf[0] != '\x5a' && buf[0] != '\xff') | |
1216 | return 0; | |
1217 | if (memcmp(buf, buf+1, 4095) != 0) | |
1218 | return 0; | |
1219 | ||
1220 | /* OK, first 4K appear blank, try the end. */ | |
1221 | get_dev_size(dfd, NULL, &size); | |
1222 | if (lseek(dfd, size-4096, SEEK_SET) < 0 || | |
1223 | read(dfd, buf, 4096) != 4096) | |
1224 | return 0; | |
1225 | ||
1226 | if (buf[0] != '\0' && buf[0] != '\x5a' && buf[0] != '\xff') | |
1227 | return 0; | |
1228 | if (memcmp(buf, buf+1, 4095) != 0) | |
1229 | return 0; | |
1230 | ||
1231 | return 1; | |
1232 | } | |
1233 | ||
1234 | /* adding a spare to a regular array is quite different from adding one to | |
1235 | * a set-of-partitions virtual array. | |
1236 | * This function determines which is worth trying and tries as appropriate. | |
1237 | * Arrays are given priority over partitions. | |
1238 | */ | |
1239 | static int try_spare(char *devname, int *dfdp, struct dev_policy *pol, | |
1240 | struct map_ent *target, | |
1241 | struct supertype *st, int verbose) | |
1242 | { | |
1243 | int i; | |
1244 | int rv; | |
1245 | int arrays_ok = 0; | |
1246 | int partitions_ok = 0; | |
1247 | int dfd = *dfdp; | |
1248 | int bare; | |
1249 | ||
1250 | /* Can only add a spare if device has at least one domain */ | |
1251 | if (pol_find(pol, pol_domain) == NULL) | |
1252 | return 1; | |
1253 | /* And only if some action allows spares */ | |
1254 | if (!policy_action_allows(pol, st?st->ss->name:NULL, act_spare)) | |
1255 | return 1; | |
1256 | ||
1257 | /* Now check if the device is bare. | |
1258 | * bare devices can always be added as a spare | |
1259 | * non-bare devices can only be added if spare-same-slot is permitted, | |
1260 | * and this device is replacing a previous device - in which case 'target' | |
1261 | * will be set. | |
1262 | */ | |
1263 | if (!is_bare(dfd)) { | |
1264 | /* Must have a target and allow same_slot */ | |
1265 | /* Later - may allow force_spare without target */ | |
1266 | if (!target || | |
1267 | !policy_action_allows(pol, st?st->ss->name:NULL, | |
1268 | act_spare_same_slot)) { | |
1269 | if (verbose > 1) | |
1270 | pr_err("%s is not bare, so not " | |
1271 | "considering as a spare\n", | |
1272 | devname); | |
1273 | return 1; | |
1274 | } | |
1275 | bare = 0; | |
1276 | } else | |
1277 | bare = 1; | |
1278 | ||
1279 | /* It might be OK to add this device to an array - need to see | |
1280 | * what arrays might be candidates. | |
1281 | */ | |
1282 | if (st) { | |
1283 | /* just try try 'array' or 'partition' based on this metadata */ | |
1284 | if (st->ss->add_to_super) | |
1285 | return array_try_spare(devname, dfdp, pol, target, bare, | |
1286 | st, verbose); | |
1287 | else | |
1288 | return partition_try_spare(devname, dfdp, pol, | |
1289 | st, verbose); | |
1290 | } | |
1291 | /* No metadata was specified or found so options are open. | |
1292 | * Check for whether any array metadata, or any partition metadata | |
1293 | * might allow adding the spare. This check is just help to avoid | |
1294 | * a more costly scan of all arrays when we can be sure that will | |
1295 | * fail. | |
1296 | */ | |
1297 | for (i = 0; (!arrays_ok || !partitions_ok) && superlist[i] ; i++) { | |
1298 | if (superlist[i]->add_to_super && !arrays_ok && | |
1299 | policy_action_allows(pol, superlist[i]->name, act_spare)) | |
1300 | arrays_ok = 1; | |
1301 | if (superlist[i]->add_to_super == NULL && !partitions_ok && | |
1302 | policy_action_allows(pol, superlist[i]->name, act_spare)) | |
1303 | partitions_ok = 1; | |
1304 | } | |
1305 | rv = 1; | |
1306 | if (arrays_ok) | |
1307 | rv = array_try_spare(devname, dfdp, pol, target, bare, | |
1308 | st, verbose); | |
1309 | if (rv != 0 && partitions_ok) | |
1310 | rv = partition_try_spare(devname, dfdp, pol, st, verbose); | |
1311 | return rv; | |
1312 | } | |
1313 | ||
1314 | int IncrementalScan(struct context *c, char *devnm) | |
1315 | { | |
1316 | /* look at every device listed in the 'map' file. | |
1317 | * If one is found that is not running then: | |
1318 | * look in mdadm.conf for bitmap file. | |
1319 | * if one exists, but array has none, add it. | |
1320 | * try to start array in auto-readonly mode | |
1321 | */ | |
1322 | struct map_ent *mapl = NULL; | |
1323 | struct map_ent *me; | |
1324 | struct mddev_ident *devs, *mddev; | |
1325 | int rv = 0; | |
1326 | char container[32]; | |
1327 | char *only = NULL; | |
1328 | ||
1329 | map_read(&mapl); | |
1330 | devs = conf_get_ident(NULL); | |
1331 | ||
1332 | restart: | |
1333 | for (me = mapl ; me ; me = me->next) { | |
1334 | mdu_array_info_t array; | |
1335 | mdu_bitmap_file_t bmf; | |
1336 | struct mdinfo *sra; | |
1337 | int mdfd; | |
1338 | ||
1339 | if (devnm && strcmp(devnm, me->devnm) != 0) | |
1340 | continue; | |
1341 | if (devnm && me->metadata[0] == '/') { | |
1342 | char *sl; | |
1343 | /* member array, need to work on container */ | |
1344 | strncpy(container, me->metadata+1, 32); | |
1345 | container[31] = 0; | |
1346 | sl = strchr(container, '/'); | |
1347 | if (sl) | |
1348 | *sl = 0; | |
1349 | only = devnm; | |
1350 | devnm = container; | |
1351 | goto restart; | |
1352 | } | |
1353 | mdfd = open_dev(me->devnm); | |
1354 | ||
1355 | if (mdfd < 0) | |
1356 | continue; | |
1357 | if (!isdigit(me->metadata[0])) { | |
1358 | /* must be a container */ | |
1359 | struct supertype *st = super_by_fd(mdfd, NULL); | |
1360 | int ret = 0; | |
1361 | struct map_ent *map = NULL; | |
1362 | if (st) | |
1363 | st->ignore_hw_compat = 1; | |
1364 | if (st && st->ss->load_container) | |
1365 | ret = st->ss->load_container(st, mdfd, NULL); | |
1366 | close(mdfd); | |
1367 | if (!ret && st->ss->container_content) { | |
1368 | if (map_lock(&map)) | |
1369 | pr_err("failed to get exclusive lock on mapfile\n"); | |
1370 | ret = Incremental_container(st, me->path, c, only); | |
1371 | map_unlock(&map); | |
1372 | } | |
1373 | if (ret) | |
1374 | rv = 1; | |
1375 | continue; | |
1376 | } | |
1377 | if (ioctl(mdfd, GET_ARRAY_INFO, &array) == 0 || | |
1378 | errno != ENODEV) { | |
1379 | close(mdfd); | |
1380 | continue; | |
1381 | } | |
1382 | /* Ok, we can try this one. Maybe it needs a bitmap */ | |
1383 | for (mddev = devs ; mddev ; mddev = mddev->next) | |
1384 | if (mddev->devname && me->path | |
1385 | && devname_matches(mddev->devname, me->path)) | |
1386 | break; | |
1387 | if (mddev && mddev->bitmap_file) { | |
1388 | /* | |
1389 | * Note: early kernels will wrongly fail this, so it | |
1390 | * is a hint only | |
1391 | */ | |
1392 | int added = -1; | |
1393 | if (ioctl(mdfd, GET_ARRAY_INFO, &bmf) < 0) { | |
1394 | int bmfd = open(mddev->bitmap_file, O_RDWR); | |
1395 | if (bmfd >= 0) { | |
1396 | added = ioctl(mdfd, SET_BITMAP_FILE, | |
1397 | bmfd); | |
1398 | close(bmfd); | |
1399 | } | |
1400 | } | |
1401 | if (c->verbose >= 0) { | |
1402 | if (added == 0) | |
1403 | pr_err("Added bitmap %s to %s\n", | |
1404 | mddev->bitmap_file, me->path); | |
1405 | else if (errno != EEXIST) | |
1406 | pr_err("Failed to add bitmap to %s: %s\n", | |
1407 | me->path, strerror(errno)); | |
1408 | } | |
1409 | } | |
1410 | /* FIXME check for reshape_active and consider not | |
1411 | * starting array. | |
1412 | */ | |
1413 | sra = sysfs_read(mdfd, NULL, 0); | |
1414 | if (sra) { | |
1415 | if (sysfs_set_str(sra, NULL, | |
1416 | "array_state", "read-auto") == 0) { | |
1417 | if (c->verbose >= 0) | |
1418 | pr_err("started array %s\n", | |
1419 | me->path ?: me->devnm); | |
1420 | } else { | |
1421 | pr_err("failed to start array %s: %s\n", | |
1422 | me->path ?: me->devnm, | |
1423 | strerror(errno)); | |
1424 | rv = 1; | |
1425 | } | |
1426 | sysfs_free(sra); | |
1427 | } | |
1428 | } | |
1429 | return rv; | |
1430 | } | |
1431 | ||
1432 | static char *container2devname(char *devname) | |
1433 | { | |
1434 | char *mdname = NULL; | |
1435 | ||
1436 | if (devname[0] == '/') { | |
1437 | int fd = open(devname, O_RDONLY); | |
1438 | if (fd >= 0) { | |
1439 | mdname = xstrdup(fd2devnm(fd)); | |
1440 | close(fd); | |
1441 | } | |
1442 | } else { | |
1443 | int uuid[4]; | |
1444 | struct map_ent *mp, *map = NULL; | |
1445 | ||
1446 | if (!parse_uuid(devname, uuid)) | |
1447 | return mdname; | |
1448 | mp = map_by_uuid(&map, uuid); | |
1449 | if (mp) | |
1450 | mdname = xstrdup(mp->devnm); | |
1451 | map_free(map); | |
1452 | } | |
1453 | ||
1454 | return mdname; | |
1455 | } | |
1456 | ||
1457 | static int Incremental_container(struct supertype *st, char *devname, | |
1458 | struct context *c, char *only) | |
1459 | { | |
1460 | /* Collect the contents of this container and for each | |
1461 | * array, choose a device name and assemble the array. | |
1462 | */ | |
1463 | ||
1464 | struct mdinfo *list; | |
1465 | struct mdinfo *ra; | |
1466 | struct map_ent *map = NULL; | |
1467 | struct mdinfo info; | |
1468 | int trustworthy; | |
1469 | struct mddev_ident *match; | |
1470 | int rv = 0; | |
1471 | struct domainlist *domains; | |
1472 | struct map_ent *smp; | |
1473 | int suuid[4]; | |
1474 | int sfd; | |
1475 | int ra_blocked = 0; | |
1476 | int ra_all = 0; | |
1477 | int result = 0; | |
1478 | ||
1479 | st->ss->getinfo_super(st, &info, NULL); | |
1480 | ||
1481 | if ((c->runstop > 0 && info.container_enough >= 0) || | |
1482 | info.container_enough > 0) | |
1483 | /* pass */; | |
1484 | else { | |
1485 | if (c->export) { | |
1486 | printf("MD_STARTED=no\n"); | |
1487 | } else if (c->verbose) | |
1488 | pr_err("not enough devices to start the container\n"); | |
1489 | return 0; | |
1490 | } | |
1491 | ||
1492 | match = conf_match(st, &info, devname, c->verbose, &rv); | |
1493 | if (match == NULL && rv == 2) | |
1494 | return rv; | |
1495 | ||
1496 | /* Need to compute 'trustworthy' */ | |
1497 | if (match) | |
1498 | trustworthy = LOCAL; | |
1499 | else if (st->ss->match_home(st, c->homehost) == 1) | |
1500 | trustworthy = LOCAL; | |
1501 | else if (st->ss->match_home(st, "any") == 1) | |
1502 | trustworthy = LOCAL; | |
1503 | else | |
1504 | trustworthy = FOREIGN; | |
1505 | ||
1506 | list = st->ss->container_content(st, NULL); | |
1507 | /* when nothing to activate - quit */ | |
1508 | if (list == NULL) { | |
1509 | if (c->export) { | |
1510 | printf("MD_STARTED=nothing\n"); | |
1511 | } | |
1512 | return 0; | |
1513 | } | |
1514 | for (ra = list ; ra ; ra = ra->next) { | |
1515 | int mdfd; | |
1516 | char chosen_name[1024]; | |
1517 | struct map_ent *mp; | |
1518 | struct mddev_ident *match = NULL; | |
1519 | ||
1520 | ra_all++; | |
1521 | /* do not activate arrays blocked by metadata handler */ | |
1522 | if (ra->array.state & (1 << MD_SB_BLOCK_VOLUME)) { | |
1523 | pr_err("Cannot activate array %s in %s.\n", | |
1524 | ra->text_version, devname); | |
1525 | ra_blocked++; | |
1526 | continue; | |
1527 | } | |
1528 | mp = map_by_uuid(&map, ra->uuid); | |
1529 | ||
1530 | if (mp) { | |
1531 | mdfd = open_dev(mp->devnm); | |
1532 | if (mp->path) | |
1533 | strcpy(chosen_name, mp->path); | |
1534 | else | |
1535 | strcpy(chosen_name, mp->devnm); | |
1536 | } else if (!only) { | |
1537 | ||
1538 | /* Check in mdadm.conf for container == devname and | |
1539 | * member == ra->text_version after second slash. | |
1540 | */ | |
1541 | char *sub = strchr(ra->text_version+1, '/'); | |
1542 | struct mddev_ident *array_list; | |
1543 | if (sub) { | |
1544 | sub++; | |
1545 | array_list = conf_get_ident(NULL); | |
1546 | } else | |
1547 | array_list = NULL; | |
1548 | for(; array_list ; array_list = array_list->next) { | |
1549 | char *dn; | |
1550 | if (array_list->member == NULL || | |
1551 | array_list->container == NULL) | |
1552 | continue; | |
1553 | if (strcmp(array_list->member, sub) != 0) | |
1554 | continue; | |
1555 | if (array_list->uuid_set && | |
1556 | !same_uuid(ra->uuid, array_list->uuid, st->ss->swapuuid)) | |
1557 | continue; | |
1558 | dn = container2devname(array_list->container); | |
1559 | if (dn == NULL) | |
1560 | continue; | |
1561 | if (strncmp(dn, ra->text_version+1, | |
1562 | strlen(dn)) != 0 || | |
1563 | ra->text_version[strlen(dn)+1] != '/') { | |
1564 | free(dn); | |
1565 | continue; | |
1566 | } | |
1567 | free(dn); | |
1568 | /* we have a match */ | |
1569 | match = array_list; | |
1570 | if (c->verbose>0) | |
1571 | pr_err("match found for member %s\n", | |
1572 | array_list->member); | |
1573 | break; | |
1574 | } | |
1575 | ||
1576 | if (match && match->devname && | |
1577 | strcasecmp(match->devname, "<ignore>") == 0) { | |
1578 | if (c->verbose > 0) | |
1579 | pr_err("array %s/%s is " | |
1580 | "explicitly ignored by mdadm.conf\n", | |
1581 | match->container, match->member); | |
1582 | continue; | |
1583 | } | |
1584 | if (match) | |
1585 | trustworthy = LOCAL; | |
1586 | ||
1587 | mdfd = create_mddev(match ? match->devname : NULL, | |
1588 | ra->name, | |
1589 | c->autof, | |
1590 | trustworthy, | |
1591 | chosen_name); | |
1592 | } | |
1593 | if (only && (!mp || strcmp(mp->devnm, only) != 0)) | |
1594 | continue; | |
1595 | ||
1596 | if (mdfd < 0) { | |
1597 | pr_err("failed to open %s: %s.\n", | |
1598 | chosen_name, strerror(errno)); | |
1599 | return 2; | |
1600 | } | |
1601 | ||
1602 | assemble_container_content(st, mdfd, ra, c, | |
1603 | chosen_name, &result); | |
1604 | close(mdfd); | |
1605 | } | |
1606 | if (c->export && result) { | |
1607 | char sep = '='; | |
1608 | printf("MD_STARTED"); | |
1609 | if (result & INCR_NO) { | |
1610 | printf("%cno", sep); | |
1611 | sep = ','; | |
1612 | } | |
1613 | if (result & INCR_UNSAFE) { | |
1614 | printf("%cunsafe", sep); | |
1615 | sep = ','; | |
1616 | } | |
1617 | if (result & INCR_ALREADY) { | |
1618 | printf("%calready", sep); | |
1619 | sep = ','; | |
1620 | } | |
1621 | if (result & INCR_YES) { | |
1622 | printf("%cyes", sep); | |
1623 | sep = ','; | |
1624 | } | |
1625 | printf("\n"); | |
1626 | } | |
1627 | ||
1628 | /* don't move spares to container with volume being activated | |
1629 | when all volumes are blocked */ | |
1630 | if (ra_all == ra_blocked) | |
1631 | return 0; | |
1632 | ||
1633 | /* Now move all suitable spares from spare container */ | |
1634 | domains = domain_from_array(list, st->ss->name); | |
1635 | memcpy(suuid, uuid_zero, sizeof(int[4])); | |
1636 | if (domains && | |
1637 | (smp = map_by_uuid(&map, suuid)) != NULL && | |
1638 | (sfd = open(smp->path, O_RDONLY)) >= 0) { | |
1639 | /* spare container found */ | |
1640 | struct supertype *sst = | |
1641 | super_imsm.match_metadata_desc("imsm"); | |
1642 | struct mdinfo *sinfo; | |
1643 | unsigned long long min_size = 0; | |
1644 | if (st->ss->min_acceptable_spare_size) | |
1645 | min_size = st->ss->min_acceptable_spare_size(st); | |
1646 | if (!sst->ss->load_container(sst, sfd, NULL)) { | |
1647 | close(sfd); | |
1648 | sinfo = container_choose_spares(sst, min_size, | |
1649 | domains, NULL, | |
1650 | st->ss->name, 0); | |
1651 | sst->ss->free_super(sst); | |
1652 | if (sinfo){ | |
1653 | int count = 0; | |
1654 | struct mdinfo *disks = sinfo->devs; | |
1655 | while (disks) { | |
1656 | /* move spare from spare | |
1657 | * container to currently | |
1658 | * assembled one | |
1659 | */ | |
1660 | if (move_spare( | |
1661 | smp->path, | |
1662 | devname, | |
1663 | makedev(disks->disk.major, | |
1664 | disks->disk.minor))) | |
1665 | count++; | |
1666 | disks = disks->next; | |
1667 | } | |
1668 | if (count) | |
1669 | pr_err("Added %d spare%s to %s\n", | |
1670 | count, count>1?"s":"", devname); | |
1671 | } | |
1672 | sysfs_free(sinfo); | |
1673 | } else | |
1674 | close(sfd); | |
1675 | } | |
1676 | domain_free(domains); | |
1677 | return 0; | |
1678 | } | |
1679 | ||
1680 | static void run_udisks(char *arg1, char *arg2) | |
1681 | { | |
1682 | int pid = fork(); | |
1683 | int status; | |
1684 | if (pid == 0) { | |
1685 | execl("/usr/bin/udisks", "udisks", arg1, arg2, NULL); | |
1686 | execl("/bin/udisks", "udisks", arg1, arg2, NULL); | |
1687 | exit(1); | |
1688 | } | |
1689 | while (pid > 0 && wait(&status) != pid) | |
1690 | ; | |
1691 | } | |
1692 | ||
1693 | /* | |
1694 | * IncrementalRemove - Attempt to see if the passed in device belongs to any | |
1695 | * raid arrays, and if so first fail (if needed) and then remove the device. | |
1696 | * | |
1697 | * @devname - The device we want to remove | |
1698 | * @id_path - name as found in /dev/disk/by-path for this device | |
1699 | * | |
1700 | * Note: the device name must be a kernel name like "sda", so | |
1701 | * that we can find it in /proc/mdstat | |
1702 | */ | |
1703 | int IncrementalRemove(char *devname, char *id_path, int verbose) | |
1704 | { | |
1705 | int mdfd; | |
1706 | int rv = 0; | |
1707 | struct mdstat_ent *ent; | |
1708 | struct mddev_dev devlist; | |
1709 | struct mdinfo mdi; | |
1710 | char buf[32]; | |
1711 | ||
1712 | if (!id_path) | |
1713 | dprintf(Name ": incremental removal without --path <id_path> " | |
1714 | "lacks the possibility to re-add new device in this " | |
1715 | "port\n"); | |
1716 | ||
1717 | if (strchr(devname, '/')) { | |
1718 | pr_err("incremental removal requires a " | |
1719 | "kernel device name, not a file: %s\n", devname); | |
1720 | return 1; | |
1721 | } | |
1722 | ent = mdstat_by_component(devname); | |
1723 | if (!ent) { | |
1724 | if (verbose >= 0) | |
1725 | pr_err("%s does not appear to be a component " | |
1726 | "of any array\n", devname); | |
1727 | return 1; | |
1728 | } | |
1729 | sysfs_init(&mdi, -1, ent->devnm); | |
1730 | if (sysfs_get_str(&mdi, NULL, "array_state", | |
1731 | buf, sizeof(buf)) > 0) { | |
1732 | if (strncmp(buf, "active", 6) == 0 || | |
1733 | strncmp(buf, "clean", 5) == 0) | |
1734 | sysfs_set_str(&mdi, NULL, | |
1735 | "array_state", "read-auto"); | |
1736 | } | |
1737 | mdfd = open_dev(ent->devnm); | |
1738 | if (mdfd < 0) { | |
1739 | if (verbose >= 0) | |
1740 | pr_err("Cannot open array %s!!\n", ent->dev); | |
1741 | free_mdstat(ent); | |
1742 | return 1; | |
1743 | } | |
1744 | ||
1745 | if (id_path) { | |
1746 | struct map_ent *map = NULL, *me; | |
1747 | me = map_by_devnm(&map, ent->devnm); | |
1748 | if (me) | |
1749 | policy_save_path(id_path, me); | |
1750 | map_free(map); | |
1751 | } | |
1752 | ||
1753 | memset(&devlist, 0, sizeof(devlist)); | |
1754 | devlist.devname = devname; | |
1755 | devlist.disposition = 'f'; | |
1756 | /* for a container, we must fail each member array */ | |
1757 | if (ent->metadata_version && | |
1758 | strncmp(ent->metadata_version, "external:", 9) == 0) { | |
1759 | struct mdstat_ent *mdstat = mdstat_read(0, 0); | |
1760 | struct mdstat_ent *memb; | |
1761 | for (memb = mdstat ; memb ; memb = memb->next) | |
1762 | if (is_container_member(memb, ent->dev)) { | |
1763 | int subfd = open_dev(memb->devnm); | |
1764 | if (subfd >= 0) { | |
1765 | rv |= Manage_subdevs( | |
1766 | memb->dev, subfd, | |
1767 | &devlist, verbose, 0, | |
1768 | NULL, 0); | |
1769 | close(subfd); | |
1770 | } | |
1771 | } | |
1772 | free_mdstat(mdstat); | |
1773 | } else | |
1774 | rv |= Manage_subdevs(ent->dev, mdfd, &devlist, | |
1775 | verbose, 0, NULL, 0); | |
1776 | if (rv & 2) { | |
1777 | /* Failed due to EBUSY, try to stop the array. | |
1778 | * Give udisks a chance to unmount it first. | |
1779 | */ | |
1780 | int devid = devnm2devid(ent->devnm); | |
1781 | run_udisks("--unmount", map_dev(major(devid),minor(devid), 0)); | |
1782 | rv = Manage_stop(ent->dev, mdfd, verbose, 1); | |
1783 | if (rv) | |
1784 | /* At least we can try to trigger a 'remove' */ | |
1785 | sysfs_uevent(&mdi, "remove"); | |
1786 | if (verbose) { | |
1787 | if (rv) | |
1788 | pr_err("Fail to stop %s too.\n", ent->devnm); | |
1789 | } | |
1790 | } else { | |
1791 | devlist.disposition = 'r'; | |
1792 | rv = Manage_subdevs(ent->dev, mdfd, &devlist, | |
1793 | verbose, 0, NULL, 0); | |
1794 | } | |
1795 | close(mdfd); | |
1796 | free_mdstat(ent); | |
1797 | return rv; | |
1798 | } |