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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) 2006-2009 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 | ||
33 | static int count_active(struct supertype *st, int mdfd, char **availp, | |
34 | struct mdinfo *info); | |
35 | static void find_reject(int mdfd, struct supertype *st, struct mdinfo *sra, | |
36 | int number, __u64 events, int verbose, | |
37 | char *array_name); | |
38 | ||
39 | int Incremental(char *devname, int verbose, int runstop, | |
40 | struct supertype *st, char *homehost, int require_homehost, | |
41 | int autof) | |
42 | { | |
43 | /* Add this device to an array, creating the array if necessary | |
44 | * and starting the array if sensible or - if runstop>0 - if possible. | |
45 | * | |
46 | * This has several steps: | |
47 | * | |
48 | * 1/ Check if device is permitted by mdadm.conf, reject if not. | |
49 | * 2/ Find metadata, reject if none appropriate (check | |
50 | * version/name from args) | |
51 | * 3/ Check if there is a match in mdadm.conf | |
52 | * 3a/ if not, check for homehost match. If no match, assemble as | |
53 | * a 'foreign' array. | |
54 | * 4/ Determine device number. | |
55 | * - If in mdadm.conf with std name, use that | |
56 | * - UUID in /var/run/mdadm.map use that | |
57 | * - If name is suggestive, use that. unless in use with different uuid. | |
58 | * - Choose a free, high number. | |
59 | * - Use a partitioned device unless strong suggestion not to. | |
60 | * e.g. auto=md | |
61 | * Don't choose partitioned for containers. | |
62 | * 5/ Find out if array already exists | |
63 | * 5a/ if it does not | |
64 | * - choose a name, from mdadm.conf or 'name' field in array. | |
65 | * - create the array | |
66 | * - add the device | |
67 | * 5b/ if it does | |
68 | * - check one drive in array to make sure metadata is a reasonably | |
69 | * close match. Reject if not (e.g. different type) | |
70 | * - add the device | |
71 | * 6/ Make sure /var/run/mdadm.map contains this array. | |
72 | * 7/ Is there enough devices to possibly start the array? | |
73 | * For a container, this means running Incremental_container. | |
74 | * 7a/ if not, finish with success. | |
75 | * 7b/ if yes, | |
76 | * - read all metadata and arrange devices like -A does | |
77 | * - if number of OK devices match expected, or -R and there are enough, | |
78 | * start the array (auto-readonly). | |
79 | */ | |
80 | struct stat stb; | |
81 | struct mdinfo info; | |
82 | struct mddev_ident_s *array_list, *match; | |
83 | char chosen_name[1024]; | |
84 | int rv = 1; | |
85 | struct map_ent *mp, *map = NULL; | |
86 | int dfd = -1, mdfd = -1; | |
87 | char *avail; | |
88 | int active_disks; | |
89 | int trustworthy = FOREIGN; | |
90 | char *name_to_use; | |
91 | mdu_array_info_t ainf; | |
92 | ||
93 | struct createinfo *ci = conf_get_create_info(); | |
94 | ||
95 | ||
96 | /* 1/ Check if device is permitted by mdadm.conf */ | |
97 | ||
98 | if (!conf_test_dev(devname)) { | |
99 | if (verbose >= 0) | |
100 | fprintf(stderr, Name | |
101 | ": %s not permitted by mdadm.conf.\n", | |
102 | devname); | |
103 | goto out; | |
104 | } | |
105 | ||
106 | /* 2/ Find metadata, reject if none appropriate (check | |
107 | * version/name from args) */ | |
108 | ||
109 | dfd = dev_open(devname, O_RDONLY|O_EXCL); | |
110 | if (dfd < 0) { | |
111 | if (verbose >= 0) | |
112 | fprintf(stderr, Name ": cannot open %s: %s.\n", | |
113 | devname, strerror(errno)); | |
114 | goto out; | |
115 | } | |
116 | if (fstat(dfd, &stb) < 0) { | |
117 | if (verbose >= 0) | |
118 | fprintf(stderr, Name ": fstat failed for %s: %s.\n", | |
119 | devname, strerror(errno)); | |
120 | goto out; | |
121 | } | |
122 | if ((stb.st_mode & S_IFMT) != S_IFBLK) { | |
123 | if (verbose >= 0) | |
124 | fprintf(stderr, Name ": %s is not a block device.\n", | |
125 | devname); | |
126 | goto out; | |
127 | } | |
128 | ||
129 | if (st == NULL && (st = guess_super(dfd)) == NULL) { | |
130 | if (verbose >= 0) | |
131 | fprintf(stderr, Name | |
132 | ": no recognisable superblock on %s.\n", | |
133 | devname); | |
134 | goto out; | |
135 | } | |
136 | if (st->ss->load_super(st, dfd, NULL)) { | |
137 | if (verbose >= 0) | |
138 | fprintf(stderr, Name ": no RAID superblock on %s.\n", | |
139 | devname); | |
140 | goto out; | |
141 | } | |
142 | close (dfd); dfd = -1; | |
143 | ||
144 | memset(&info, 0, sizeof(info)); | |
145 | st->ss->getinfo_super(st, &info); | |
146 | /* 3/ Check if there is a match in mdadm.conf */ | |
147 | ||
148 | array_list = conf_get_ident(NULL); | |
149 | match = NULL; | |
150 | for (; array_list; array_list = array_list->next) { | |
151 | if (array_list->uuid_set && | |
152 | same_uuid(array_list->uuid, info.uuid, st->ss->swapuuid) | |
153 | == 0) { | |
154 | if (verbose >= 2 && array_list->devname) | |
155 | fprintf(stderr, Name | |
156 | ": UUID differs from %s.\n", | |
157 | array_list->devname); | |
158 | continue; | |
159 | } | |
160 | if (array_list->name[0] && | |
161 | strcasecmp(array_list->name, info.name) != 0) { | |
162 | if (verbose >= 2 && array_list->devname) | |
163 | fprintf(stderr, Name | |
164 | ": Name differs from %s.\n", | |
165 | array_list->devname); | |
166 | continue; | |
167 | } | |
168 | if (array_list->devices && | |
169 | !match_oneof(array_list->devices, devname)) { | |
170 | if (verbose >= 2 && array_list->devname) | |
171 | fprintf(stderr, Name | |
172 | ": Not a listed device for %s.\n", | |
173 | array_list->devname); | |
174 | continue; | |
175 | } | |
176 | if (array_list->super_minor != UnSet && | |
177 | array_list->super_minor != info.array.md_minor) { | |
178 | if (verbose >= 2 && array_list->devname) | |
179 | fprintf(stderr, Name | |
180 | ": Different super-minor to %s.\n", | |
181 | array_list->devname); | |
182 | continue; | |
183 | } | |
184 | if (!array_list->uuid_set && | |
185 | !array_list->name[0] && | |
186 | !array_list->devices && | |
187 | array_list->super_minor == UnSet) { | |
188 | if (verbose >= 2 && array_list->devname) | |
189 | fprintf(stderr, Name | |
190 | ": %s doesn't have any identifying information.\n", | |
191 | array_list->devname); | |
192 | continue; | |
193 | } | |
194 | /* FIXME, should I check raid_disks and level too?? */ | |
195 | ||
196 | if (match) { | |
197 | if (verbose >= 0) { | |
198 | if (match->devname && array_list->devname) | |
199 | fprintf(stderr, Name | |
200 | ": we match both %s and %s - cannot decide which to use.\n", | |
201 | match->devname, array_list->devname); | |
202 | else | |
203 | fprintf(stderr, Name | |
204 | ": multiple lines in mdadm.conf match\n"); | |
205 | } | |
206 | rv = 2; | |
207 | goto out; | |
208 | } | |
209 | match = array_list; | |
210 | } | |
211 | ||
212 | if (match && match->devname | |
213 | && strcasecmp(match->devname, "<ignore>") == 0) { | |
214 | if (verbose >= 0) | |
215 | fprintf(stderr, Name ": array containing %s is explicitly" | |
216 | " ignored by mdadm.conf\n", | |
217 | devname); | |
218 | goto out; | |
219 | } | |
220 | ||
221 | /* 3a/ if not, check for homehost match. If no match, continue | |
222 | * but don't trust the 'name' in the array. Thus a 'random' minor | |
223 | * number will be assigned, and the device name will be based | |
224 | * on that. */ | |
225 | if (match) | |
226 | trustworthy = LOCAL; | |
227 | else if (st->ss->match_home(st, homehost) == 1) | |
228 | trustworthy = LOCAL; | |
229 | else if (st->ss->match_home(st, "any") == 1) | |
230 | trustworthy = LOCAL_ANY; | |
231 | else | |
232 | trustworthy = FOREIGN; | |
233 | ||
234 | ||
235 | if (!match && !conf_test_metadata(st->ss->name, | |
236 | (trustworthy == LOCAL))) { | |
237 | if (verbose >= 1) | |
238 | fprintf(stderr, Name | |
239 | ": %s has metadata type %s for which " | |
240 | "auto-assembly is disabled\n", | |
241 | devname, st->ss->name); | |
242 | goto out; | |
243 | } | |
244 | if (trustworthy == LOCAL_ANY) | |
245 | trustworthy = LOCAL; | |
246 | ||
247 | /* There are three possible sources for 'autof': command line, | |
248 | * ARRAY line in mdadm.conf, or CREATE line in mdadm.conf. | |
249 | * ARRAY takes precedence, then command line, then | |
250 | * CREATE. | |
251 | */ | |
252 | if (match && match->autof) | |
253 | autof = match->autof; | |
254 | if (autof == 0) | |
255 | autof = ci->autof; | |
256 | ||
257 | if (st->ss->container_content && st->loaded_container) { | |
258 | if ((runstop > 0 && info.container_enough >= 0) || | |
259 | info.container_enough > 0) | |
260 | /* pass */; | |
261 | else { | |
262 | if (verbose) | |
263 | fprintf(stderr, Name ": not enough devices to start the container\n"); | |
264 | rv = 0; | |
265 | goto out; | |
266 | } | |
267 | ||
268 | /* This is a pre-built container array, so we do something | |
269 | * rather different. | |
270 | */ | |
271 | rv = Incremental_container(st, devname, verbose, runstop, | |
272 | autof, trustworthy); | |
273 | goto out; | |
274 | } | |
275 | ||
276 | name_to_use = info.name; | |
277 | if (name_to_use[0] == 0 && | |
278 | info.array.level == LEVEL_CONTAINER && | |
279 | trustworthy == LOCAL) { | |
280 | name_to_use = info.text_version; | |
281 | trustworthy = METADATA; | |
282 | } | |
283 | if (name_to_use[0] && trustworthy != LOCAL && | |
284 | ! require_homehost && | |
285 | conf_name_is_free(name_to_use)) | |
286 | trustworthy = LOCAL; | |
287 | ||
288 | /* strip "hostname:" prefix from name if we have decided | |
289 | * to treat it as LOCAL | |
290 | */ | |
291 | if (trustworthy == LOCAL && strchr(name_to_use, ':') != NULL) | |
292 | name_to_use = strchr(name_to_use, ':')+1; | |
293 | ||
294 | /* 4/ Check if array exists. | |
295 | */ | |
296 | if (map_lock(&map)) | |
297 | fprintf(stderr, Name ": failed to get exclusive lock on " | |
298 | "mapfile\n"); | |
299 | mp = map_by_uuid(&map, info.uuid); | |
300 | if (mp) | |
301 | mdfd = open_dev(mp->devnum); | |
302 | else | |
303 | mdfd = -1; | |
304 | ||
305 | if (mdfd < 0) { | |
306 | struct mdinfo *sra; | |
307 | struct mdinfo dinfo; | |
308 | ||
309 | /* Couldn't find an existing array, maybe make a new one */ | |
310 | mdfd = create_mddev(match ? match->devname : NULL, | |
311 | name_to_use, autof, trustworthy, chosen_name); | |
312 | ||
313 | if (mdfd < 0) | |
314 | goto out; | |
315 | ||
316 | sysfs_init(&info, mdfd, 0); | |
317 | ||
318 | if (set_array_info(mdfd, st, &info) != 0) { | |
319 | fprintf(stderr, Name ": failed to set array info for %s: %s\n", | |
320 | chosen_name, strerror(errno)); | |
321 | rv = 2; | |
322 | goto out; | |
323 | } | |
324 | ||
325 | dinfo = info; | |
326 | dinfo.disk.major = major(stb.st_rdev); | |
327 | dinfo.disk.minor = minor(stb.st_rdev); | |
328 | if (add_disk(mdfd, st, &info, &dinfo) != 0) { | |
329 | fprintf(stderr, Name ": failed to add %s to %s: %s.\n", | |
330 | devname, chosen_name, strerror(errno)); | |
331 | ioctl(mdfd, STOP_ARRAY, 0); | |
332 | rv = 2; | |
333 | goto out; | |
334 | } | |
335 | sra = sysfs_read(mdfd, fd2devnum(mdfd), GET_DEVS); | |
336 | if (!sra || !sra->devs || sra->devs->disk.raid_disk >= 0) { | |
337 | /* It really should be 'none' - must be old buggy | |
338 | * kernel, and mdadm -I may not be able to complete. | |
339 | * So reject it. | |
340 | */ | |
341 | ioctl(mdfd, STOP_ARRAY, NULL); | |
342 | fprintf(stderr, Name | |
343 | ": You have an old buggy kernel which cannot support\n" | |
344 | " --incremental reliably. Aborting.\n"); | |
345 | sysfs_free(sra); | |
346 | rv = 2; | |
347 | goto out; | |
348 | } | |
349 | info.array.working_disks = 1; | |
350 | sysfs_free(sra); | |
351 | /* 6/ Make sure /var/run/mdadm.map contains this array. */ | |
352 | map_update(&map, fd2devnum(mdfd), | |
353 | info.text_version, | |
354 | info.uuid, chosen_name); | |
355 | } else { | |
356 | /* 5b/ if it does */ | |
357 | /* - check one drive in array to make sure metadata is a reasonably */ | |
358 | /* close match. Reject if not (e.g. different type) */ | |
359 | /* - add the device */ | |
360 | char dn[20]; | |
361 | int dfd2; | |
362 | int err; | |
363 | struct mdinfo *sra; | |
364 | struct supertype *st2; | |
365 | struct mdinfo info2, *d; | |
366 | ||
367 | if (mp->path) | |
368 | strcpy(chosen_name, mp->path); | |
369 | else | |
370 | strcpy(chosen_name, devnum2devname(mp->devnum)); | |
371 | ||
372 | /* It is generally not OK to add non-spare drives to a | |
373 | * running array as they are probably missing because | |
374 | * they failed. However if runstop is 1, then the | |
375 | * array was possibly started early and our best be is | |
376 | * to add this anyway. It would probably be good to | |
377 | * allow explicit policy statement about this. | |
378 | */ | |
379 | if ((info.disk.state & (1<<MD_DISK_SYNC)) != 0 | |
380 | && runstop < 1) { | |
381 | int active = 0; | |
382 | ||
383 | if (st->ss->external) { | |
384 | char *devname = devnum2devname(fd2devnum(mdfd)); | |
385 | ||
386 | active = devname && is_container_active(devname); | |
387 | free(devname); | |
388 | } else if (ioctl(mdfd, GET_ARRAY_INFO, &ainf) == 0) | |
389 | active = 1; | |
390 | if (active) { | |
391 | fprintf(stderr, Name | |
392 | ": not adding %s to active array (without --run) %s\n", | |
393 | devname, chosen_name); | |
394 | rv = 2; | |
395 | goto out; | |
396 | } | |
397 | } | |
398 | sra = sysfs_read(mdfd, fd2devnum(mdfd), (GET_DEVS | GET_STATE)); | |
399 | if (!sra) { | |
400 | rv = 2; | |
401 | goto out; | |
402 | } | |
403 | if (sra->devs) { | |
404 | sprintf(dn, "%d:%d", sra->devs->disk.major, | |
405 | sra->devs->disk.minor); | |
406 | dfd2 = dev_open(dn, O_RDONLY); | |
407 | st2 = dup_super(st); | |
408 | if (st2->ss->load_super(st2, dfd2, NULL) || | |
409 | st->ss->compare_super(st, st2) != 0) { | |
410 | fprintf(stderr, Name | |
411 | ": metadata mismatch between %s and " | |
412 | "chosen array %s\n", | |
413 | devname, chosen_name); | |
414 | close(dfd2); | |
415 | rv = 2; | |
416 | goto out; | |
417 | } | |
418 | close(dfd2); | |
419 | memset(&info2, 0, sizeof(info2)); | |
420 | st2->ss->getinfo_super(st2, &info2); | |
421 | st2->ss->free_super(st2); | |
422 | if (info.array.level != info2.array.level || | |
423 | memcmp(info.uuid, info2.uuid, 16) != 0 || | |
424 | info.array.raid_disks != info2.array.raid_disks) { | |
425 | fprintf(stderr, Name | |
426 | ": unexpected difference between %s and %s.\n", | |
427 | chosen_name, devname); | |
428 | rv = 2; | |
429 | goto out; | |
430 | } | |
431 | } | |
432 | info2.disk.major = major(stb.st_rdev); | |
433 | info2.disk.minor = minor(stb.st_rdev); | |
434 | /* add disk needs to know about containers */ | |
435 | if (st->ss->external) | |
436 | sra->array.level = LEVEL_CONTAINER; | |
437 | err = add_disk(mdfd, st, sra, &info2); | |
438 | if (err < 0 && errno == EBUSY) { | |
439 | /* could be another device present with the same | |
440 | * disk.number. Find and reject any such | |
441 | */ | |
442 | find_reject(mdfd, st, sra, info.disk.number, | |
443 | info.events, verbose, chosen_name); | |
444 | err = add_disk(mdfd, st, sra, &info2); | |
445 | } | |
446 | if (err < 0) { | |
447 | fprintf(stderr, Name ": failed to add %s to %s: %s.\n", | |
448 | devname, chosen_name, strerror(errno)); | |
449 | rv = 2; | |
450 | goto out; | |
451 | } | |
452 | info.array.working_disks = 0; | |
453 | for (d = sra->devs; d; d=d->next) | |
454 | info.array.working_disks ++; | |
455 | ||
456 | } | |
457 | ||
458 | /* 7/ Is there enough devices to possibly start the array? */ | |
459 | /* 7a/ if not, finish with success. */ | |
460 | if (info.array.level == LEVEL_CONTAINER) { | |
461 | /* Try to assemble within the container */ | |
462 | map_unlock(&map); | |
463 | sysfs_uevent(&info, "change"); | |
464 | if (verbose >= 0) | |
465 | fprintf(stderr, Name | |
466 | ": container %s now has %d devices\n", | |
467 | chosen_name, info.array.working_disks); | |
468 | wait_for(chosen_name, mdfd); | |
469 | close(mdfd); | |
470 | rv = Incremental(chosen_name, verbose, runstop, | |
471 | NULL, homehost, require_homehost, autof); | |
472 | if (rv == 1) | |
473 | /* Don't fail the whole -I if a subarray didn't | |
474 | * have enough devices to start yet | |
475 | */ | |
476 | rv = 0; | |
477 | return rv; | |
478 | } | |
479 | avail = NULL; | |
480 | active_disks = count_active(st, mdfd, &avail, &info); | |
481 | if (enough(info.array.level, info.array.raid_disks, | |
482 | info.array.layout, info.array.state & 1, | |
483 | avail, active_disks) == 0) { | |
484 | free(avail); | |
485 | if (verbose >= 0) | |
486 | fprintf(stderr, Name | |
487 | ": %s attached to %s, not enough to start (%d).\n", | |
488 | devname, chosen_name, active_disks); | |
489 | map_unlock(&map); | |
490 | rv = 0; | |
491 | goto out; | |
492 | } | |
493 | free(avail); | |
494 | ||
495 | /* 7b/ if yes, */ | |
496 | /* - if number of OK devices match expected, or -R and there */ | |
497 | /* are enough, */ | |
498 | /* + add any bitmap file */ | |
499 | /* + start the array (auto-readonly). */ | |
500 | ||
501 | if (ioctl(mdfd, GET_ARRAY_INFO, &ainf) == 0) { | |
502 | if (verbose >= 0) | |
503 | fprintf(stderr, Name | |
504 | ": %s attached to %s which is already active.\n", | |
505 | devname, chosen_name); | |
506 | map_unlock(&map); | |
507 | rv = 0; | |
508 | goto out; | |
509 | } | |
510 | ||
511 | map_unlock(&map); | |
512 | if (runstop > 0 || active_disks >= info.array.working_disks) { | |
513 | struct mdinfo *sra; | |
514 | /* Let's try to start it */ | |
515 | if (match && match->bitmap_file) { | |
516 | int bmfd = open(match->bitmap_file, O_RDWR); | |
517 | if (bmfd < 0) { | |
518 | fprintf(stderr, Name | |
519 | ": Could not open bitmap file %s.\n", | |
520 | match->bitmap_file); | |
521 | goto out; | |
522 | } | |
523 | if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) { | |
524 | close(bmfd); | |
525 | fprintf(stderr, Name | |
526 | ": Failed to set bitmapfile for %s.\n", | |
527 | chosen_name); | |
528 | goto out; | |
529 | } | |
530 | close(bmfd); | |
531 | } | |
532 | sra = sysfs_read(mdfd, fd2devnum(mdfd), 0); | |
533 | if ((sra == NULL || active_disks >= info.array.working_disks) | |
534 | && trustworthy != FOREIGN) | |
535 | rv = ioctl(mdfd, RUN_ARRAY, NULL); | |
536 | else | |
537 | rv = sysfs_set_str(sra, NULL, | |
538 | "array_state", "read-auto"); | |
539 | if (rv == 0) { | |
540 | if (verbose >= 0) | |
541 | fprintf(stderr, Name | |
542 | ": %s attached to %s, which has been started.\n", | |
543 | devname, chosen_name); | |
544 | rv = 0; | |
545 | wait_for(chosen_name, mdfd); | |
546 | } else { | |
547 | fprintf(stderr, Name | |
548 | ": %s attached to %s, but failed to start: %s.\n", | |
549 | devname, chosen_name, strerror(errno)); | |
550 | rv = 1; | |
551 | } | |
552 | } else { | |
553 | if (verbose >= 0) | |
554 | fprintf(stderr, Name | |
555 | ": %s attached to %s, not enough to start safely.\n", | |
556 | devname, chosen_name); | |
557 | rv = 0; | |
558 | } | |
559 | out: | |
560 | if (dfd >= 0) | |
561 | close(dfd); | |
562 | if (mdfd >= 0) | |
563 | close(mdfd); | |
564 | return rv; | |
565 | } | |
566 | ||
567 | static void find_reject(int mdfd, struct supertype *st, struct mdinfo *sra, | |
568 | int number, __u64 events, int verbose, | |
569 | char *array_name) | |
570 | { | |
571 | /* Find a device attached to this array with a disk.number of number | |
572 | * and events less than the passed events, and remove the device. | |
573 | */ | |
574 | struct mdinfo *d; | |
575 | mdu_array_info_t ra; | |
576 | ||
577 | if (ioctl(mdfd, GET_ARRAY_INFO, &ra) == 0) | |
578 | return; /* not safe to remove from active arrays | |
579 | * without thinking more */ | |
580 | ||
581 | for (d = sra->devs; d ; d = d->next) { | |
582 | char dn[10]; | |
583 | int dfd; | |
584 | struct mdinfo info; | |
585 | sprintf(dn, "%d:%d", d->disk.major, d->disk.minor); | |
586 | dfd = dev_open(dn, O_RDONLY); | |
587 | if (dfd < 0) | |
588 | continue; | |
589 | if (st->ss->load_super(st, dfd, NULL)) { | |
590 | close(dfd); | |
591 | continue; | |
592 | } | |
593 | st->ss->getinfo_super(st, &info); | |
594 | st->ss->free_super(st); | |
595 | close(dfd); | |
596 | ||
597 | if (info.disk.number != number || | |
598 | info.events >= events) | |
599 | continue; | |
600 | ||
601 | if (d->disk.raid_disk > -1) | |
602 | sysfs_set_str(sra, d, "slot", "none"); | |
603 | if (sysfs_set_str(sra, d, "state", "remove") == 0) | |
604 | if (verbose >= 0) | |
605 | fprintf(stderr, Name | |
606 | ": removing old device %s from %s\n", | |
607 | d->sys_name+4, array_name); | |
608 | } | |
609 | } | |
610 | ||
611 | static int count_active(struct supertype *st, int mdfd, char **availp, | |
612 | struct mdinfo *bestinfo) | |
613 | { | |
614 | /* count how many devices in sra think they are active */ | |
615 | struct mdinfo *d; | |
616 | int cnt = 0, cnt1 = 0; | |
617 | __u64 max_events = 0; | |
618 | struct mdinfo *sra = sysfs_read(mdfd, -1, GET_DEVS | GET_STATE); | |
619 | char *avail = NULL; | |
620 | ||
621 | if (!sra) | |
622 | return 0; | |
623 | ||
624 | for (d = sra->devs ; d ; d = d->next) { | |
625 | char dn[30]; | |
626 | int dfd; | |
627 | int ok; | |
628 | struct mdinfo info; | |
629 | ||
630 | sprintf(dn, "%d:%d", d->disk.major, d->disk.minor); | |
631 | dfd = dev_open(dn, O_RDONLY); | |
632 | if (dfd < 0) | |
633 | continue; | |
634 | ok = st->ss->load_super(st, dfd, NULL); | |
635 | close(dfd); | |
636 | if (ok != 0) | |
637 | continue; | |
638 | st->ss->getinfo_super(st, &info); | |
639 | if (!avail) { | |
640 | avail = malloc(info.array.raid_disks); | |
641 | if (!avail) { | |
642 | fprintf(stderr, Name ": out of memory.\n"); | |
643 | exit(1); | |
644 | } | |
645 | memset(avail, 0, info.array.raid_disks); | |
646 | *availp = avail; | |
647 | } | |
648 | ||
649 | if (info.disk.state & (1<<MD_DISK_SYNC)) | |
650 | { | |
651 | if (cnt == 0) { | |
652 | cnt++; | |
653 | max_events = info.events; | |
654 | avail[info.disk.raid_disk] = 2; | |
655 | st->ss->getinfo_super(st, bestinfo); | |
656 | } else if (info.events == max_events) { | |
657 | cnt++; | |
658 | avail[info.disk.raid_disk] = 2; | |
659 | } else if (info.events == max_events-1) { | |
660 | cnt1++; | |
661 | avail[info.disk.raid_disk] = 1; | |
662 | } else if (info.events < max_events - 1) | |
663 | ; | |
664 | else if (info.events == max_events+1) { | |
665 | int i; | |
666 | cnt1 = cnt; | |
667 | cnt = 1; | |
668 | max_events = info.events; | |
669 | for (i=0; i<info.array.raid_disks; i++) | |
670 | if (avail[i]) | |
671 | avail[i]--; | |
672 | avail[info.disk.raid_disk] = 2; | |
673 | st->ss->getinfo_super(st, bestinfo); | |
674 | } else { /* info.events much bigger */ | |
675 | cnt = 1; cnt1 = 0; | |
676 | memset(avail, 0, info.disk.raid_disk); | |
677 | max_events = info.events; | |
678 | st->ss->getinfo_super(st, bestinfo); | |
679 | } | |
680 | } | |
681 | st->ss->free_super(st); | |
682 | } | |
683 | return cnt + cnt1; | |
684 | } | |
685 | ||
686 | int IncrementalScan(int verbose) | |
687 | { | |
688 | /* look at every device listed in the 'map' file. | |
689 | * If one is found that is not running then: | |
690 | * look in mdadm.conf for bitmap file. | |
691 | * if one exists, but array has none, add it. | |
692 | * try to start array in auto-readonly mode | |
693 | */ | |
694 | struct map_ent *mapl = NULL; | |
695 | struct map_ent *me; | |
696 | mddev_ident_t devs, mddev; | |
697 | int rv = 0; | |
698 | ||
699 | map_read(&mapl); | |
700 | devs = conf_get_ident(NULL); | |
701 | ||
702 | for (me = mapl ; me ; me = me->next) { | |
703 | mdu_array_info_t array; | |
704 | mdu_bitmap_file_t bmf; | |
705 | struct mdinfo *sra; | |
706 | int mdfd = open_dev(me->devnum); | |
707 | ||
708 | if (mdfd < 0) | |
709 | continue; | |
710 | if (ioctl(mdfd, GET_ARRAY_INFO, &array) == 0 || | |
711 | errno != ENODEV) { | |
712 | close(mdfd); | |
713 | continue; | |
714 | } | |
715 | /* Ok, we can try this one. Maybe it needs a bitmap */ | |
716 | for (mddev = devs ; mddev ; mddev = mddev->next) | |
717 | if (mddev->devname && me->path | |
718 | && devname_matches(mddev->devname, me->path)) | |
719 | break; | |
720 | if (mddev && mddev->bitmap_file) { | |
721 | /* | |
722 | * Note: early kernels will wrongly fail this, so it | |
723 | * is a hint only | |
724 | */ | |
725 | int added = -1; | |
726 | if (ioctl(mdfd, GET_ARRAY_INFO, &bmf) < 0) { | |
727 | int bmfd = open(mddev->bitmap_file, O_RDWR); | |
728 | if (bmfd >= 0) { | |
729 | added = ioctl(mdfd, SET_BITMAP_FILE, | |
730 | bmfd); | |
731 | close(bmfd); | |
732 | } | |
733 | } | |
734 | if (verbose >= 0) { | |
735 | if (added == 0) | |
736 | fprintf(stderr, Name | |
737 | ": Added bitmap %s to %s\n", | |
738 | mddev->bitmap_file, me->path); | |
739 | else if (errno != EEXIST) | |
740 | fprintf(stderr, Name | |
741 | ": Failed to add bitmap to %s: %s\n", | |
742 | me->path, strerror(errno)); | |
743 | } | |
744 | } | |
745 | sra = sysfs_read(mdfd, 0, 0); | |
746 | if (sra) { | |
747 | if (sysfs_set_str(sra, NULL, | |
748 | "array_state", "read-auto") == 0) { | |
749 | if (verbose >= 0) | |
750 | fprintf(stderr, Name | |
751 | ": started array %s\n", | |
752 | me->path ?: devnum2devname(me->devnum)); | |
753 | } else { | |
754 | fprintf(stderr, Name | |
755 | ": failed to start array %s: %s\n", | |
756 | me->path ?: devnum2devname(me->devnum), | |
757 | strerror(errno)); | |
758 | rv = 1; | |
759 | } | |
760 | } | |
761 | } | |
762 | return rv; | |
763 | } | |
764 | ||
765 | static char *container2devname(char *devname) | |
766 | { | |
767 | char *mdname = NULL; | |
768 | ||
769 | if (devname[0] == '/') { | |
770 | int fd = open(devname, O_RDONLY); | |
771 | if (fd >= 0) { | |
772 | mdname = devnum2devname(fd2devnum(fd)); | |
773 | close(fd); | |
774 | } | |
775 | } else { | |
776 | int uuid[4]; | |
777 | struct map_ent *mp, *map = NULL; | |
778 | ||
779 | if (!parse_uuid(devname, uuid)) | |
780 | return mdname; | |
781 | mp = map_by_uuid(&map, uuid); | |
782 | if (mp) | |
783 | mdname = devnum2devname(mp->devnum); | |
784 | map_free(map); | |
785 | } | |
786 | ||
787 | return mdname; | |
788 | } | |
789 | ||
790 | int Incremental_container(struct supertype *st, char *devname, int verbose, | |
791 | int runstop, int autof, int trustworthy) | |
792 | { | |
793 | /* Collect the contents of this container and for each | |
794 | * array, choose a device name and assemble the array. | |
795 | */ | |
796 | ||
797 | struct mdinfo *list = st->ss->container_content(st); | |
798 | struct mdinfo *ra; | |
799 | struct map_ent *map = NULL; | |
800 | ||
801 | if (map_lock(&map)) | |
802 | fprintf(stderr, Name ": failed to get exclusive lock on " | |
803 | "mapfile\n"); | |
804 | ||
805 | for (ra = list ; ra ; ra = ra->next) { | |
806 | int mdfd; | |
807 | char chosen_name[1024]; | |
808 | struct map_ent *mp; | |
809 | struct mddev_ident_s *match = NULL; | |
810 | ||
811 | mp = map_by_uuid(&map, ra->uuid); | |
812 | ||
813 | if (mp) { | |
814 | mdfd = open_dev(mp->devnum); | |
815 | if (mp->path) | |
816 | strcpy(chosen_name, mp->path); | |
817 | else | |
818 | strcpy(chosen_name, devnum2devname(mp->devnum)); | |
819 | } else { | |
820 | ||
821 | /* Check in mdadm.conf for container == devname and | |
822 | * member == ra->text_version after second slash. | |
823 | */ | |
824 | char *sub = strchr(ra->text_version+1, '/'); | |
825 | struct mddev_ident_s *array_list; | |
826 | if (sub) { | |
827 | sub++; | |
828 | array_list = conf_get_ident(NULL); | |
829 | } else | |
830 | array_list = NULL; | |
831 | for(; array_list ; array_list = array_list->next) { | |
832 | char *dn; | |
833 | if (array_list->member == NULL || | |
834 | array_list->container == NULL) | |
835 | continue; | |
836 | if (strcmp(array_list->member, sub) != 0) | |
837 | continue; | |
838 | if (array_list->uuid_set && | |
839 | !same_uuid(ra->uuid, array_list->uuid, st->ss->swapuuid)) | |
840 | continue; | |
841 | dn = container2devname(array_list->container); | |
842 | if (dn == NULL) | |
843 | continue; | |
844 | if (strncmp(dn, ra->text_version+1, | |
845 | strlen(dn)) != 0 || | |
846 | ra->text_version[strlen(dn)+1] != '/') { | |
847 | free(dn); | |
848 | continue; | |
849 | } | |
850 | free(dn); | |
851 | /* we have a match */ | |
852 | match = array_list; | |
853 | if (verbose>0) | |
854 | fprintf(stderr, Name ": match found for member %s\n", | |
855 | array_list->member); | |
856 | break; | |
857 | } | |
858 | ||
859 | if (match && match->devname && | |
860 | strcasecmp(match->devname, "<ignore>") == 0) { | |
861 | if (verbose > 0) | |
862 | fprintf(stderr, Name ": array %s/%s is " | |
863 | "explicitly ignored by mdadm.conf\n", | |
864 | match->container, match->member); | |
865 | return 2; | |
866 | } | |
867 | if (match) | |
868 | trustworthy = LOCAL; | |
869 | ||
870 | mdfd = create_mddev(match ? match->devname : NULL, | |
871 | ra->name, | |
872 | autof, | |
873 | trustworthy, | |
874 | chosen_name); | |
875 | } | |
876 | ||
877 | if (mdfd < 0) { | |
878 | fprintf(stderr, Name ": failed to open %s: %s.\n", | |
879 | chosen_name, strerror(errno)); | |
880 | return 2; | |
881 | } | |
882 | ||
883 | assemble_container_content(st, mdfd, ra, runstop, | |
884 | chosen_name, verbose); | |
885 | } | |
886 | map_unlock(&map); | |
887 | return 0; | |
888 | } | |
889 | ||
890 | /* | |
891 | * IncrementalRemove - Attempt to see if the passed in device belongs to any | |
892 | * raid arrays, and if so first fail (if needed) and then remove the device. | |
893 | * | |
894 | * @devname - The device we want to remove | |
895 | * | |
896 | * Note: the device name must be a kernel name like "sda", so | |
897 | * that we can find it in /proc/mdstat | |
898 | */ | |
899 | int IncrementalRemove(char *devname, int verbose) | |
900 | { | |
901 | int mdfd; | |
902 | int rv; | |
903 | struct mdstat_ent *ent; | |
904 | struct mddev_dev_s devlist; | |
905 | ||
906 | if (strchr(devname, '/')) { | |
907 | fprintf(stderr, Name ": incremental removal requires a " | |
908 | "kernel device name, not a file: %s\n", devname); | |
909 | return 1; | |
910 | } | |
911 | ent = mdstat_by_component(devname); | |
912 | if (!ent) { | |
913 | fprintf(stderr, Name ": %s does not appear to be a component " | |
914 | "of any array\n", devname); | |
915 | return 1; | |
916 | } | |
917 | mdfd = open_dev(ent->devnum); | |
918 | if (mdfd < 0) { | |
919 | fprintf(stderr, Name ": Cannot open array %s!!\n", ent->dev); | |
920 | return 1; | |
921 | } | |
922 | memset(&devlist, 0, sizeof(devlist)); | |
923 | devlist.devname = devname; | |
924 | devlist.disposition = 'f'; | |
925 | Manage_subdevs(ent->dev, mdfd, &devlist, verbose, 0); | |
926 | devlist.disposition = 'r'; | |
927 | rv = Manage_subdevs(ent->dev, mdfd, &devlist, verbose, 0); | |
928 | close(mdfd); | |
929 | return rv; | |
930 | } |