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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 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; | |
85 | struct map_ent *mp, *map = NULL; | |
86 | int dfd, mdfd; | |
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 | return 1; | |
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 | return 1; | |
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 | close(dfd); | |
121 | return 1; | |
122 | } | |
123 | if ((stb.st_mode & S_IFMT) != S_IFBLK) { | |
124 | if (verbose >= 0) | |
125 | fprintf(stderr, Name ": %s is not a block device.\n", | |
126 | devname); | |
127 | close(dfd); | |
128 | return 1; | |
129 | } | |
130 | ||
131 | if (st == NULL && (st = guess_super(dfd)) == NULL) { | |
132 | if (verbose >= 0) | |
133 | fprintf(stderr, Name | |
134 | ": no recognisable superblock on %s.\n", | |
135 | devname); | |
136 | close(dfd); | |
137 | return 1; | |
138 | } | |
139 | if (st->ss->load_super(st, dfd, NULL)) { | |
140 | if (verbose >= 0) | |
141 | fprintf(stderr, Name ": no RAID superblock on %s.\n", | |
142 | devname); | |
143 | close(dfd); | |
144 | return 1; | |
145 | } | |
146 | close (dfd); | |
147 | ||
148 | memset(&info, 0, sizeof(info)); | |
149 | st->ss->getinfo_super(st, &info); | |
150 | /* 3/ Check if there is a match in mdadm.conf */ | |
151 | ||
152 | array_list = conf_get_ident(NULL); | |
153 | match = NULL; | |
154 | for (; array_list; array_list = array_list->next) { | |
155 | if (array_list->uuid_set && | |
156 | same_uuid(array_list->uuid, info.uuid, st->ss->swapuuid) | |
157 | == 0) { | |
158 | if (verbose >= 2 && array_list->devname) | |
159 | fprintf(stderr, Name | |
160 | ": UUID differs from %s.\n", | |
161 | array_list->devname); | |
162 | continue; | |
163 | } | |
164 | if (array_list->name[0] && | |
165 | strcasecmp(array_list->name, info.name) != 0) { | |
166 | if (verbose >= 2 && array_list->devname) | |
167 | fprintf(stderr, Name | |
168 | ": Name differs from %s.\n", | |
169 | array_list->devname); | |
170 | continue; | |
171 | } | |
172 | if (array_list->devices && | |
173 | !match_oneof(array_list->devices, devname)) { | |
174 | if (verbose >= 2 && array_list->devname) | |
175 | fprintf(stderr, Name | |
176 | ": Not a listed device for %s.\n", | |
177 | array_list->devname); | |
178 | continue; | |
179 | } | |
180 | if (array_list->super_minor != UnSet && | |
181 | array_list->super_minor != info.array.md_minor) { | |
182 | if (verbose >= 2 && array_list->devname) | |
183 | fprintf(stderr, Name | |
184 | ": Different super-minor to %s.\n", | |
185 | array_list->devname); | |
186 | continue; | |
187 | } | |
188 | if (!array_list->uuid_set && | |
189 | !array_list->name[0] && | |
190 | !array_list->devices && | |
191 | array_list->super_minor == UnSet) { | |
192 | if (verbose >= 2 && array_list->devname) | |
193 | fprintf(stderr, Name | |
194 | ": %s doesn't have any identifying information.\n", | |
195 | array_list->devname); | |
196 | continue; | |
197 | } | |
198 | /* FIXME, should I check raid_disks and level too?? */ | |
199 | ||
200 | if (match) { | |
201 | if (verbose >= 0) { | |
202 | if (match->devname && array_list->devname) | |
203 | fprintf(stderr, Name | |
204 | ": we match both %s and %s - cannot decide which to use.\n", | |
205 | match->devname, array_list->devname); | |
206 | else | |
207 | fprintf(stderr, Name | |
208 | ": multiple lines in mdadm.conf match\n"); | |
209 | } | |
210 | return 2; | |
211 | } | |
212 | match = array_list; | |
213 | } | |
214 | ||
215 | if (match && match->devname | |
216 | && strcasecmp(match->devname, "<ignore>") == 0) { | |
217 | if (verbose >= 0) | |
218 | fprintf(stderr, Name ": array containing %s is explicitly" | |
219 | " ignored by mdadm.conf\n", | |
220 | devname); | |
221 | return 1; | |
222 | } | |
223 | ||
224 | if (!match && !conf_test_metadata(st->ss->name)) { | |
225 | if (verbose >= 1) | |
226 | fprintf(stderr, Name | |
227 | ": %s has metadata type %s for which " | |
228 | "auto-assembly is disabled\n", | |
229 | devname, st->ss->name); | |
230 | return 1; | |
231 | } | |
232 | ||
233 | /* 3a/ if not, check for homehost match. If no match, continue | |
234 | * but don't trust the 'name' in the array. Thus a 'random' minor | |
235 | * number will be assigned, and the device name will be based | |
236 | * on that. */ | |
237 | if (match) | |
238 | trustworthy = LOCAL; | |
239 | else if ((homehost == NULL || | |
240 | st->ss->match_home(st, homehost) != 1) && | |
241 | st->ss->match_home(st, "any") != 1) | |
242 | trustworthy = FOREIGN; | |
243 | else | |
244 | trustworthy = LOCAL; | |
245 | ||
246 | /* There are three possible sources for 'autof': command line, | |
247 | * ARRAY line in mdadm.conf, or CREATE line in mdadm.conf. | |
248 | * ARRAY takes precedence, then command line, then | |
249 | * CREATE. | |
250 | */ | |
251 | if (match && match->autof) | |
252 | autof = match->autof; | |
253 | if (autof == 0) | |
254 | autof = ci->autof; | |
255 | ||
256 | if (st->ss->container_content && st->loaded_container) { | |
257 | /* This is a pre-built container array, so we do something | |
258 | * rather different. | |
259 | */ | |
260 | return Incremental_container(st, devname, verbose, runstop, | |
261 | autof, trustworthy); | |
262 | } | |
263 | name_to_use = strchr(info.name, ':'); | |
264 | if (name_to_use) | |
265 | name_to_use++; | |
266 | else | |
267 | name_to_use = info.name; | |
268 | ||
269 | if (name_to_use[0] == 0 && | |
270 | info.array.level == LEVEL_CONTAINER && | |
271 | trustworthy == LOCAL) { | |
272 | name_to_use = info.text_version; | |
273 | trustworthy = METADATA; | |
274 | } | |
275 | if (name_to_use[0] && trustworthy != LOCAL && | |
276 | ! require_homehost && | |
277 | conf_name_is_free(name_to_use)) | |
278 | trustworthy = LOCAL; | |
279 | ||
280 | /* 4/ Check if array exists. | |
281 | */ | |
282 | map_lock(&map); | |
283 | mp = map_by_uuid(&map, info.uuid); | |
284 | if (mp) { | |
285 | mdfd = open_mddev(mp->path, 0); | |
286 | if (mdfd < 0 && mddev_busy(mp->devnum)) { | |
287 | /* maybe udev hasn't created it yet. */ | |
288 | char buf[50]; | |
289 | sprintf(buf, "%d:%d", dev2major(mp->devnum), | |
290 | dev2minor(mp->devnum)); | |
291 | mdfd = dev_open(buf, O_RDWR); | |
292 | } | |
293 | } else | |
294 | mdfd = -1; | |
295 | ||
296 | if (mdfd < 0) { | |
297 | struct mdinfo *sra; | |
298 | struct mdinfo dinfo; | |
299 | ||
300 | /* Couldn't find an existing array, maybe make a new one */ | |
301 | mdfd = create_mddev(match ? match->devname : NULL, | |
302 | name_to_use, autof, trustworthy, chosen_name); | |
303 | ||
304 | if (mdfd < 0) | |
305 | return 1; | |
306 | ||
307 | sysfs_init(&info, mdfd, 0); | |
308 | ||
309 | if (set_array_info(mdfd, st, &info) != 0) { | |
310 | fprintf(stderr, Name ": failed to set array info for %s: %s\n", | |
311 | chosen_name, strerror(errno)); | |
312 | close(mdfd); | |
313 | return 2; | |
314 | } | |
315 | ||
316 | dinfo = info; | |
317 | dinfo.disk.major = major(stb.st_rdev); | |
318 | dinfo.disk.minor = minor(stb.st_rdev); | |
319 | if (add_disk(mdfd, st, &info, &dinfo) != 0) { | |
320 | fprintf(stderr, Name ": failed to add %s to %s: %s.\n", | |
321 | devname, chosen_name, strerror(errno)); | |
322 | ioctl(mdfd, STOP_ARRAY, 0); | |
323 | close(mdfd); | |
324 | return 2; | |
325 | } | |
326 | sra = sysfs_read(mdfd, fd2devnum(mdfd), GET_DEVS); | |
327 | if (!sra || !sra->devs || sra->devs->disk.raid_disk >= 0) { | |
328 | /* It really should be 'none' - must be old buggy | |
329 | * kernel, and mdadm -I may not be able to complete. | |
330 | * So reject it. | |
331 | */ | |
332 | ioctl(mdfd, STOP_ARRAY, NULL); | |
333 | fprintf(stderr, Name | |
334 | ": You have an old buggy kernel which cannot support\n" | |
335 | " --incremental reliably. Aborting.\n"); | |
336 | close(mdfd); | |
337 | sysfs_free(sra); | |
338 | return 2; | |
339 | } | |
340 | info.array.working_disks = 1; | |
341 | sysfs_free(sra); | |
342 | /* 6/ Make sure /var/run/mdadm.map contains this array. */ | |
343 | map_update(&map, fd2devnum(mdfd), | |
344 | info.text_version, | |
345 | info.uuid, chosen_name); | |
346 | } else { | |
347 | /* 5b/ if it does */ | |
348 | /* - check one drive in array to make sure metadata is a reasonably */ | |
349 | /* close match. Reject if not (e.g. different type) */ | |
350 | /* - add the device */ | |
351 | char dn[20]; | |
352 | int dfd2; | |
353 | int err; | |
354 | struct mdinfo *sra; | |
355 | struct supertype *st2; | |
356 | struct mdinfo info2, *d; | |
357 | ||
358 | strcpy(chosen_name, mp->path); | |
359 | ||
360 | sra = sysfs_read(mdfd, fd2devnum(mdfd), (GET_DEVS | GET_STATE)); | |
361 | ||
362 | if (sra->devs) { | |
363 | sprintf(dn, "%d:%d", sra->devs->disk.major, | |
364 | sra->devs->disk.minor); | |
365 | dfd2 = dev_open(dn, O_RDONLY); | |
366 | st2 = dup_super(st); | |
367 | if (st2->ss->load_super(st2, dfd2, NULL) || | |
368 | st->ss->compare_super(st, st2) != 0) { | |
369 | fprintf(stderr, Name | |
370 | ": metadata mismatch between %s and " | |
371 | "chosen array %s\n", | |
372 | devname, chosen_name); | |
373 | close(mdfd); | |
374 | close(dfd2); | |
375 | return 2; | |
376 | } | |
377 | close(dfd2); | |
378 | memset(&info2, 0, sizeof(info2)); | |
379 | st2->ss->getinfo_super(st2, &info2); | |
380 | st2->ss->free_super(st2); | |
381 | if (info.array.level != info2.array.level || | |
382 | memcmp(info.uuid, info2.uuid, 16) != 0 || | |
383 | info.array.raid_disks != info2.array.raid_disks) { | |
384 | fprintf(stderr, Name | |
385 | ": unexpected difference between %s and %s.\n", | |
386 | chosen_name, devname); | |
387 | close(mdfd); | |
388 | return 2; | |
389 | } | |
390 | } | |
391 | info2.disk.major = major(stb.st_rdev); | |
392 | info2.disk.minor = minor(stb.st_rdev); | |
393 | /* add disk needs to know about containers */ | |
394 | if (st->ss->external) | |
395 | sra->array.level = LEVEL_CONTAINER; | |
396 | err = add_disk(mdfd, st2, sra, &info2); | |
397 | if (err < 0 && errno == EBUSY) { | |
398 | /* could be another device present with the same | |
399 | * disk.number. Find and reject any such | |
400 | */ | |
401 | find_reject(mdfd, st, sra, info.disk.number, | |
402 | info.events, verbose, chosen_name); | |
403 | err = add_disk(mdfd, st2, sra, &info2); | |
404 | } | |
405 | if (err < 0) { | |
406 | fprintf(stderr, Name ": failed to add %s to %s: %s.\n", | |
407 | devname, chosen_name, strerror(errno)); | |
408 | close(mdfd); | |
409 | return 2; | |
410 | } | |
411 | info.array.working_disks = 0; | |
412 | for (d = sra->devs; d; d=d->next) | |
413 | info.array.working_disks ++; | |
414 | ||
415 | } | |
416 | ||
417 | /* 7/ Is there enough devices to possibly start the array? */ | |
418 | /* 7a/ if not, finish with success. */ | |
419 | if (info.array.level == LEVEL_CONTAINER) { | |
420 | /* Try to assemble within the container */ | |
421 | map_unlock(&map); | |
422 | sysfs_uevent(&info, "change"); | |
423 | if (verbose >= 0) | |
424 | fprintf(stderr, Name | |
425 | ": container %s now has %d devices\n", | |
426 | chosen_name, info.array.working_disks); | |
427 | wait_for(chosen_name, mdfd); | |
428 | close(mdfd); | |
429 | if (runstop < 0) | |
430 | return 0; /* don't try to assemble */ | |
431 | rv = Incremental(chosen_name, verbose, runstop, | |
432 | NULL, homehost, require_homehost, autof); | |
433 | if (rv == 1) | |
434 | /* Don't fail the whole -I if a subarray didn't | |
435 | * have enough devices to start yet | |
436 | */ | |
437 | rv = 0; | |
438 | return rv; | |
439 | } | |
440 | avail = NULL; | |
441 | active_disks = count_active(st, mdfd, &avail, &info); | |
442 | if (enough(info.array.level, info.array.raid_disks, | |
443 | info.array.layout, info.array.state & 1, | |
444 | avail, active_disks) == 0 || | |
445 | (runstop < 0 && active_disks < info.array.raid_disks)) { | |
446 | free(avail); | |
447 | if (verbose >= 0) | |
448 | fprintf(stderr, Name | |
449 | ": %s attached to %s, not enough to start (%d).\n", | |
450 | devname, chosen_name, active_disks); | |
451 | map_unlock(&map); | |
452 | close(mdfd); | |
453 | return 0; | |
454 | } | |
455 | free(avail); | |
456 | ||
457 | /* 7b/ if yes, */ | |
458 | /* - if number of OK devices match expected, or -R and there */ | |
459 | /* are enough, */ | |
460 | /* + add any bitmap file */ | |
461 | /* + start the array (auto-readonly). */ | |
462 | ||
463 | if (ioctl(mdfd, GET_ARRAY_INFO, &ainf) == 0) { | |
464 | if (verbose >= 0) | |
465 | fprintf(stderr, Name | |
466 | ": %s attached to %s which is already active.\n", | |
467 | devname, chosen_name); | |
468 | close(mdfd); | |
469 | map_unlock(&map); | |
470 | return 0; | |
471 | } | |
472 | ||
473 | map_unlock(&map); | |
474 | if (runstop > 0 || active_disks >= info.array.working_disks) { | |
475 | struct mdinfo *sra; | |
476 | /* Let's try to start it */ | |
477 | if (match && match->bitmap_file) { | |
478 | int bmfd = open(match->bitmap_file, O_RDWR); | |
479 | if (bmfd < 0) { | |
480 | fprintf(stderr, Name | |
481 | ": Could not open bitmap file %s.\n", | |
482 | match->bitmap_file); | |
483 | close(mdfd); | |
484 | return 1; | |
485 | } | |
486 | if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) { | |
487 | close(bmfd); | |
488 | fprintf(stderr, Name | |
489 | ": Failed to set bitmapfile for %s.\n", | |
490 | chosen_name); | |
491 | close(mdfd); | |
492 | return 1; | |
493 | } | |
494 | close(bmfd); | |
495 | } | |
496 | sra = sysfs_read(mdfd, fd2devnum(mdfd), 0); | |
497 | if ((sra == NULL || active_disks >= info.array.working_disks) | |
498 | && trustworthy != FOREIGN) | |
499 | rv = ioctl(mdfd, RUN_ARRAY, NULL); | |
500 | else | |
501 | rv = sysfs_set_str(sra, NULL, | |
502 | "array_state", "read-auto"); | |
503 | if (rv == 0) { | |
504 | if (verbose >= 0) | |
505 | fprintf(stderr, Name | |
506 | ": %s attached to %s, which has been started.\n", | |
507 | devname, chosen_name); | |
508 | rv = 0; | |
509 | wait_for(chosen_name, mdfd); | |
510 | } else { | |
511 | fprintf(stderr, Name | |
512 | ": %s attached to %s, but failed to start: %s.\n", | |
513 | devname, chosen_name, strerror(errno)); | |
514 | rv = 1; | |
515 | } | |
516 | } else { | |
517 | if (verbose >= 0) | |
518 | fprintf(stderr, Name | |
519 | ": %s attached to %s, not enough to start safely.\n", | |
520 | devname, chosen_name); | |
521 | rv = 0; | |
522 | } | |
523 | close(mdfd); | |
524 | return rv; | |
525 | } | |
526 | ||
527 | static void find_reject(int mdfd, struct supertype *st, struct mdinfo *sra, | |
528 | int number, __u64 events, int verbose, | |
529 | char *array_name) | |
530 | { | |
531 | /* Find a device attached to this array with a disk.number of number | |
532 | * and events less than the passed events, and remove the device. | |
533 | */ | |
534 | struct mdinfo *d; | |
535 | mdu_array_info_t ra; | |
536 | ||
537 | if (ioctl(mdfd, GET_ARRAY_INFO, &ra) == 0) | |
538 | return; /* not safe to remove from active arrays | |
539 | * without thinking more */ | |
540 | ||
541 | for (d = sra->devs; d ; d = d->next) { | |
542 | char dn[10]; | |
543 | int dfd; | |
544 | struct mdinfo info; | |
545 | sprintf(dn, "%d:%d", d->disk.major, d->disk.minor); | |
546 | dfd = dev_open(dn, O_RDONLY); | |
547 | if (dfd < 0) | |
548 | continue; | |
549 | if (st->ss->load_super(st, dfd, NULL)) { | |
550 | close(dfd); | |
551 | continue; | |
552 | } | |
553 | st->ss->getinfo_super(st, &info); | |
554 | st->ss->free_super(st); | |
555 | close(dfd); | |
556 | ||
557 | if (info.disk.number != number || | |
558 | info.events >= events) | |
559 | continue; | |
560 | ||
561 | if (d->disk.raid_disk > -1) | |
562 | sysfs_set_str(sra, d, "slot", "none"); | |
563 | if (sysfs_set_str(sra, d, "state", "remove") == 0) | |
564 | if (verbose >= 0) | |
565 | fprintf(stderr, Name | |
566 | ": removing old device %s from %s\n", | |
567 | d->sys_name+4, array_name); | |
568 | } | |
569 | } | |
570 | ||
571 | static int count_active(struct supertype *st, int mdfd, char **availp, | |
572 | struct mdinfo *bestinfo) | |
573 | { | |
574 | /* count how many devices in sra think they are active */ | |
575 | struct mdinfo *d; | |
576 | int cnt = 0, cnt1 = 0; | |
577 | __u64 max_events = 0; | |
578 | struct mdinfo *sra = sysfs_read(mdfd, -1, GET_DEVS | GET_STATE); | |
579 | char *avail = NULL; | |
580 | ||
581 | for (d = sra->devs ; d ; d = d->next) { | |
582 | char dn[30]; | |
583 | int dfd; | |
584 | int ok; | |
585 | struct mdinfo info; | |
586 | ||
587 | sprintf(dn, "%d:%d", d->disk.major, d->disk.minor); | |
588 | dfd = dev_open(dn, O_RDONLY); | |
589 | if (dfd < 0) | |
590 | continue; | |
591 | ok = st->ss->load_super(st, dfd, NULL); | |
592 | close(dfd); | |
593 | if (ok != 0) | |
594 | continue; | |
595 | st->ss->getinfo_super(st, &info); | |
596 | if (!avail) { | |
597 | avail = malloc(info.array.raid_disks); | |
598 | if (!avail) { | |
599 | fprintf(stderr, Name ": out of memory.\n"); | |
600 | exit(1); | |
601 | } | |
602 | memset(avail, 0, info.array.raid_disks); | |
603 | *availp = avail; | |
604 | } | |
605 | ||
606 | if (info.disk.state & (1<<MD_DISK_SYNC)) | |
607 | { | |
608 | if (cnt == 0) { | |
609 | cnt++; | |
610 | max_events = info.events; | |
611 | avail[info.disk.raid_disk] = 2; | |
612 | st->ss->getinfo_super(st, bestinfo); | |
613 | } else if (info.events == max_events) { | |
614 | cnt++; | |
615 | avail[info.disk.raid_disk] = 2; | |
616 | } else if (info.events == max_events-1) { | |
617 | cnt1++; | |
618 | avail[info.disk.raid_disk] = 1; | |
619 | } else if (info.events < max_events - 1) | |
620 | ; | |
621 | else if (info.events == max_events+1) { | |
622 | int i; | |
623 | cnt1 = cnt; | |
624 | cnt = 1; | |
625 | max_events = info.events; | |
626 | for (i=0; i<info.array.raid_disks; i++) | |
627 | if (avail[i]) | |
628 | avail[i]--; | |
629 | avail[info.disk.raid_disk] = 2; | |
630 | st->ss->getinfo_super(st, bestinfo); | |
631 | } else { /* info.events much bigger */ | |
632 | cnt = 1; cnt1 = 0; | |
633 | memset(avail, 0, info.disk.raid_disk); | |
634 | max_events = info.events; | |
635 | st->ss->getinfo_super(st, bestinfo); | |
636 | } | |
637 | } | |
638 | st->ss->free_super(st); | |
639 | } | |
640 | return cnt + cnt1; | |
641 | } | |
642 | ||
643 | int IncrementalScan(int verbose) | |
644 | { | |
645 | /* look at every device listed in the 'map' file. | |
646 | * If one is found that is not running then: | |
647 | * look in mdadm.conf for bitmap file. | |
648 | * if one exists, but array has none, add it. | |
649 | * try to start array in auto-readonly mode | |
650 | */ | |
651 | struct map_ent *mapl = NULL; | |
652 | struct map_ent *me; | |
653 | mddev_ident_t devs, mddev; | |
654 | int rv = 0; | |
655 | ||
656 | map_read(&mapl); | |
657 | devs = conf_get_ident(NULL); | |
658 | ||
659 | for (me = mapl ; me ; me = me->next) { | |
660 | mdu_array_info_t array; | |
661 | mdu_bitmap_file_t bmf; | |
662 | struct mdinfo *sra; | |
663 | int mdfd = open_mddev(me->path, 0); | |
664 | ||
665 | if (mdfd < 0) | |
666 | continue; | |
667 | if (ioctl(mdfd, GET_ARRAY_INFO, &array) == 0 || | |
668 | errno != ENODEV) { | |
669 | close(mdfd); | |
670 | continue; | |
671 | } | |
672 | /* Ok, we can try this one. Maybe it needs a bitmap */ | |
673 | for (mddev = devs ; mddev ; mddev = mddev->next) | |
674 | if (mddev->devname | |
675 | && strcmp(mddev->devname, me->path) == 0) | |
676 | break; | |
677 | if (mddev && mddev->bitmap_file) { | |
678 | /* | |
679 | * Note: early kernels will wrongly fail this, so it | |
680 | * is a hint only | |
681 | */ | |
682 | int added = -1; | |
683 | if (ioctl(mdfd, GET_ARRAY_INFO, &bmf) < 0) { | |
684 | int bmfd = open(mddev->bitmap_file, O_RDWR); | |
685 | if (bmfd >= 0) { | |
686 | added = ioctl(mdfd, SET_BITMAP_FILE, | |
687 | bmfd); | |
688 | close(bmfd); | |
689 | } | |
690 | } | |
691 | if (verbose >= 0) { | |
692 | if (added == 0) | |
693 | fprintf(stderr, Name | |
694 | ": Added bitmap %s to %s\n", | |
695 | mddev->bitmap_file, me->path); | |
696 | else if (errno != EEXIST) | |
697 | fprintf(stderr, Name | |
698 | ": Failed to add bitmap to %s: %s\n", | |
699 | me->path, strerror(errno)); | |
700 | } | |
701 | } | |
702 | sra = sysfs_read(mdfd, 0, 0); | |
703 | if (sra) { | |
704 | if (sysfs_set_str(sra, NULL, | |
705 | "array_state", "read-auto") == 0) { | |
706 | if (verbose >= 0) | |
707 | fprintf(stderr, Name | |
708 | ": started array %s\n", | |
709 | me->path); | |
710 | } else { | |
711 | fprintf(stderr, Name | |
712 | ": failed to start array %s: %s\n", | |
713 | me->path, strerror(errno)); | |
714 | rv = 1; | |
715 | } | |
716 | } | |
717 | } | |
718 | return rv; | |
719 | } | |
720 | ||
721 | static char *container2devname(char *devname) | |
722 | { | |
723 | char *mdname = NULL; | |
724 | ||
725 | if (devname[0] == '/') { | |
726 | int fd = open(devname, O_RDONLY); | |
727 | if (fd >= 0) { | |
728 | mdname = devnum2devname(fd2devnum(fd)); | |
729 | close(fd); | |
730 | } | |
731 | } else { | |
732 | int uuid[4]; | |
733 | struct map_ent *mp, *map = NULL; | |
734 | ||
735 | if (!parse_uuid(devname, uuid)) | |
736 | return mdname; | |
737 | mp = map_by_uuid(&map, uuid); | |
738 | if (mp) | |
739 | mdname = devnum2devname(mp->devnum); | |
740 | map_free(map); | |
741 | } | |
742 | ||
743 | return mdname; | |
744 | } | |
745 | ||
746 | int Incremental_container(struct supertype *st, char *devname, int verbose, | |
747 | int runstop, int autof, int trustworthy) | |
748 | { | |
749 | /* Collect the contents of this container and for each | |
750 | * array, choose a device name and assemble the array. | |
751 | */ | |
752 | ||
753 | struct mdinfo *list = st->ss->container_content(st); | |
754 | struct mdinfo *ra; | |
755 | struct map_ent *map = NULL; | |
756 | ||
757 | map_lock(&map); | |
758 | ||
759 | for (ra = list ; ra ; ra = ra->next) { | |
760 | int mdfd; | |
761 | char chosen_name[1024]; | |
762 | struct map_ent *mp; | |
763 | struct mddev_ident_s *match = NULL; | |
764 | ||
765 | mp = map_by_uuid(&map, ra->uuid); | |
766 | ||
767 | if (mp) { | |
768 | mdfd = open_dev(mp->devnum); | |
769 | strcpy(chosen_name, mp->path); | |
770 | } else { | |
771 | ||
772 | /* Check in mdadm.conf for container == devname and | |
773 | * member == ra->text_version after second slash. | |
774 | */ | |
775 | char *sub = strchr(ra->text_version+1, '/'); | |
776 | struct mddev_ident_s *array_list; | |
777 | if (sub) { | |
778 | sub++; | |
779 | array_list = conf_get_ident(NULL); | |
780 | } else | |
781 | array_list = NULL; | |
782 | for(; array_list ; array_list = array_list->next) { | |
783 | char *dn; | |
784 | if (array_list->member == NULL || | |
785 | array_list->container == NULL) | |
786 | continue; | |
787 | if (strcmp(array_list->member, sub) != 0) | |
788 | continue; | |
789 | if (array_list->uuid_set && | |
790 | !same_uuid(ra->uuid, array_list->uuid, st->ss->swapuuid)) | |
791 | continue; | |
792 | dn = container2devname(array_list->container); | |
793 | if (dn == NULL) | |
794 | continue; | |
795 | if (strncmp(dn, ra->text_version+1, | |
796 | strlen(dn)) != 0 || | |
797 | ra->text_version[strlen(dn)+1] != '/') { | |
798 | free(dn); | |
799 | continue; | |
800 | } | |
801 | free(dn); | |
802 | /* we have a match */ | |
803 | match = array_list; | |
804 | if (verbose>0) | |
805 | fprintf(stderr, Name ": match found for member %s\n", | |
806 | array_list->member); | |
807 | break; | |
808 | } | |
809 | ||
810 | if (match && match->devname && | |
811 | strcasecmp(match->devname, "<ignore>") == 0) { | |
812 | if (verbose > 0) | |
813 | fprintf(stderr, Name ": array %s/%s is " | |
814 | "explicitly ignored by mdadm.conf\n", | |
815 | match->container, match->member); | |
816 | return 2; | |
817 | } | |
818 | if (match) | |
819 | trustworthy = LOCAL; | |
820 | ||
821 | mdfd = create_mddev(match ? match->devname : NULL, | |
822 | ra->name, | |
823 | autof, | |
824 | trustworthy, | |
825 | chosen_name); | |
826 | } | |
827 | ||
828 | if (mdfd < 0) { | |
829 | fprintf(stderr, Name ": failed to open %s: %s.\n", | |
830 | chosen_name, strerror(errno)); | |
831 | return 2; | |
832 | } | |
833 | ||
834 | assemble_container_content(st, mdfd, ra, runstop, | |
835 | chosen_name, verbose); | |
836 | } | |
837 | map_unlock(&map); | |
838 | return 0; | |
839 | } |