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Merge commit '3288b419b988b20a53a2b12eb8e5f9f536228db4'; commit '4363fd80bcc9f85ed824...
[thirdparty/mdadm.git] / Incremental.c
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;
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 /* 3a/ if not, check for homehost match. If no match, continue
225 * but don't trust the 'name' in the array. Thus a 'random' minor
226 * number will be assigned, and the device name will be based
227 * on that. */
228 if (match)
229 trustworthy = LOCAL;
230 else if (st->ss->match_home(st, homehost) == 1)
231 trustworthy = LOCAL;
232 else if (st->ss->match_home(st, "any") == 1)
233 trustworthy = LOCAL_ANY;
234 else
235 trustworthy = FOREIGN;
236
237
238 if (!match && !conf_test_metadata(st->ss->name,
239 (trustworthy == LOCAL))) {
240 if (verbose >= 1)
241 fprintf(stderr, Name
242 ": %s has metadata type %s for which "
243 "auto-assembly is disabled\n",
244 devname, st->ss->name);
245 return 1;
246 }
247 if (trustworthy == LOCAL_ANY)
248 trustworthy = LOCAL;
249
250 /* There are three possible sources for 'autof': command line,
251 * ARRAY line in mdadm.conf, or CREATE line in mdadm.conf.
252 * ARRAY takes precedence, then command line, then
253 * CREATE.
254 */
255 if (match && match->autof)
256 autof = match->autof;
257 if (autof == 0)
258 autof = ci->autof;
259
260 if (st->ss->container_content && st->loaded_container) {
261 if ((runstop > 0 && info.container_enough >= 0) ||
262 info.container_enough > 0)
263 /* pass */;
264 else {
265 if (verbose)
266 fprintf(stderr, Name ": not enough devices to start the container\n");
267 return 1;
268 }
269
270 /* This is a pre-built container array, so we do something
271 * rather different.
272 */
273 return Incremental_container(st, devname, verbose, runstop,
274 autof, trustworthy);
275 }
276
277 name_to_use = info.name;
278 if (name_to_use[0] == 0 &&
279 info.array.level == LEVEL_CONTAINER &&
280 trustworthy == LOCAL) {
281 name_to_use = info.text_version;
282 trustworthy = METADATA;
283 }
284 if (name_to_use[0] && trustworthy != LOCAL &&
285 ! require_homehost &&
286 conf_name_is_free(name_to_use))
287 trustworthy = LOCAL;
288
289 /* strip "hostname:" prefix from name if we have decided
290 * to treat it as LOCAL
291 */
292 if (trustworthy == LOCAL && strchr(name_to_use, ':') != NULL)
293 name_to_use = strchr(name_to_use, ':')+1;
294
295 /* 4/ Check if array exists.
296 */
297 map_lock(&map);
298 mp = map_by_uuid(&map, info.uuid);
299 if (mp)
300 mdfd = open_dev(mp->devnum);
301 else
302 mdfd = -1;
303
304 if (mdfd < 0) {
305 struct mdinfo *sra;
306 struct mdinfo dinfo;
307
308 /* Couldn't find an existing array, maybe make a new one */
309 mdfd = create_mddev(match ? match->devname : NULL,
310 name_to_use, autof, trustworthy, chosen_name);
311
312 if (mdfd < 0)
313 return 1;
314
315 sysfs_init(&info, mdfd, 0);
316
317 if (set_array_info(mdfd, st, &info) != 0) {
318 fprintf(stderr, Name ": failed to set array info for %s: %s\n",
319 chosen_name, strerror(errno));
320 close(mdfd);
321 return 2;
322 }
323
324 dinfo = info;
325 dinfo.disk.major = major(stb.st_rdev);
326 dinfo.disk.minor = minor(stb.st_rdev);
327 if (add_disk(mdfd, st, &info, &dinfo) != 0) {
328 fprintf(stderr, Name ": failed to add %s to %s: %s.\n",
329 devname, chosen_name, strerror(errno));
330 ioctl(mdfd, STOP_ARRAY, 0);
331 close(mdfd);
332 return 2;
333 }
334 sra = sysfs_read(mdfd, fd2devnum(mdfd), GET_DEVS);
335 if (!sra || !sra->devs || sra->devs->disk.raid_disk >= 0) {
336 /* It really should be 'none' - must be old buggy
337 * kernel, and mdadm -I may not be able to complete.
338 * So reject it.
339 */
340 ioctl(mdfd, STOP_ARRAY, NULL);
341 fprintf(stderr, Name
342 ": You have an old buggy kernel which cannot support\n"
343 " --incremental reliably. Aborting.\n");
344 close(mdfd);
345 sysfs_free(sra);
346 return 2;
347 }
348 info.array.working_disks = 1;
349 sysfs_free(sra);
350 /* 6/ Make sure /var/run/mdadm.map contains this array. */
351 map_update(&map, fd2devnum(mdfd),
352 info.text_version,
353 info.uuid, chosen_name);
354 } else {
355 /* 5b/ if it does */
356 /* - check one drive in array to make sure metadata is a reasonably */
357 /* close match. Reject if not (e.g. different type) */
358 /* - add the device */
359 char dn[20];
360 int dfd2;
361 int err;
362 struct mdinfo *sra;
363 struct supertype *st2;
364 struct mdinfo info2, *d;
365
366 if (mp->path)
367 strcpy(chosen_name, mp->path);
368 else
369 strcpy(chosen_name, devnum2devname(mp->devnum));
370
371 sra = sysfs_read(mdfd, fd2devnum(mdfd), (GET_DEVS | GET_STATE));
372
373 if (sra->devs) {
374 sprintf(dn, "%d:%d", sra->devs->disk.major,
375 sra->devs->disk.minor);
376 dfd2 = dev_open(dn, O_RDONLY);
377 st2 = dup_super(st);
378 if (st2->ss->load_super(st2, dfd2, NULL) ||
379 st->ss->compare_super(st, st2) != 0) {
380 fprintf(stderr, Name
381 ": metadata mismatch between %s and "
382 "chosen array %s\n",
383 devname, chosen_name);
384 close(mdfd);
385 close(dfd2);
386 return 2;
387 }
388 close(dfd2);
389 memset(&info2, 0, sizeof(info2));
390 st2->ss->getinfo_super(st2, &info2);
391 st2->ss->free_super(st2);
392 if (info.array.level != info2.array.level ||
393 memcmp(info.uuid, info2.uuid, 16) != 0 ||
394 info.array.raid_disks != info2.array.raid_disks) {
395 fprintf(stderr, Name
396 ": unexpected difference between %s and %s.\n",
397 chosen_name, devname);
398 close(mdfd);
399 return 2;
400 }
401 }
402 info2.disk.major = major(stb.st_rdev);
403 info2.disk.minor = minor(stb.st_rdev);
404 /* add disk needs to know about containers */
405 if (st->ss->external)
406 sra->array.level = LEVEL_CONTAINER;
407 err = add_disk(mdfd, st, sra, &info2);
408 if (err < 0 && errno == EBUSY) {
409 /* could be another device present with the same
410 * disk.number. Find and reject any such
411 */
412 find_reject(mdfd, st, sra, info.disk.number,
413 info.events, verbose, chosen_name);
414 err = add_disk(mdfd, st, sra, &info2);
415 }
416 if (err < 0) {
417 fprintf(stderr, Name ": failed to add %s to %s: %s.\n",
418 devname, chosen_name, strerror(errno));
419 close(mdfd);
420 return 2;
421 }
422 info.array.working_disks = 0;
423 for (d = sra->devs; d; d=d->next)
424 info.array.working_disks ++;
425
426 }
427
428 /* 7/ Is there enough devices to possibly start the array? */
429 /* 7a/ if not, finish with success. */
430 if (info.array.level == LEVEL_CONTAINER) {
431 /* Try to assemble within the container */
432 map_unlock(&map);
433 sysfs_uevent(&info, "change");
434 if (verbose >= 0)
435 fprintf(stderr, Name
436 ": container %s now has %d devices\n",
437 chosen_name, info.array.working_disks);
438 wait_for(chosen_name, mdfd);
439 close(mdfd);
440 rv = Incremental(chosen_name, verbose, runstop,
441 NULL, homehost, require_homehost, autof);
442 if (rv == 1)
443 /* Don't fail the whole -I if a subarray didn't
444 * have enough devices to start yet
445 */
446 rv = 0;
447 return rv;
448 }
449 avail = NULL;
450 active_disks = count_active(st, mdfd, &avail, &info);
451 if (enough(info.array.level, info.array.raid_disks,
452 info.array.layout, info.array.state & 1,
453 avail, active_disks) == 0) {
454 free(avail);
455 if (verbose >= 0)
456 fprintf(stderr, Name
457 ": %s attached to %s, not enough to start (%d).\n",
458 devname, chosen_name, active_disks);
459 map_unlock(&map);
460 close(mdfd);
461 return 0;
462 }
463 free(avail);
464
465 /* 7b/ if yes, */
466 /* - if number of OK devices match expected, or -R and there */
467 /* are enough, */
468 /* + add any bitmap file */
469 /* + start the array (auto-readonly). */
470
471 if (ioctl(mdfd, GET_ARRAY_INFO, &ainf) == 0) {
472 if (verbose >= 0)
473 fprintf(stderr, Name
474 ": %s attached to %s which is already active.\n",
475 devname, chosen_name);
476 close(mdfd);
477 map_unlock(&map);
478 return 0;
479 }
480
481 map_unlock(&map);
482 if (runstop > 0 || active_disks >= info.array.working_disks) {
483 struct mdinfo *sra;
484 /* Let's try to start it */
485 if (match && match->bitmap_file) {
486 int bmfd = open(match->bitmap_file, O_RDWR);
487 if (bmfd < 0) {
488 fprintf(stderr, Name
489 ": Could not open bitmap file %s.\n",
490 match->bitmap_file);
491 close(mdfd);
492 return 1;
493 }
494 if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) {
495 close(bmfd);
496 fprintf(stderr, Name
497 ": Failed to set bitmapfile for %s.\n",
498 chosen_name);
499 close(mdfd);
500 return 1;
501 }
502 close(bmfd);
503 }
504 sra = sysfs_read(mdfd, fd2devnum(mdfd), 0);
505 if ((sra == NULL || active_disks >= info.array.working_disks)
506 && trustworthy != FOREIGN)
507 rv = ioctl(mdfd, RUN_ARRAY, NULL);
508 else
509 rv = sysfs_set_str(sra, NULL,
510 "array_state", "read-auto");
511 if (rv == 0) {
512 if (verbose >= 0)
513 fprintf(stderr, Name
514 ": %s attached to %s, which has been started.\n",
515 devname, chosen_name);
516 rv = 0;
517 wait_for(chosen_name, mdfd);
518 } else {
519 fprintf(stderr, Name
520 ": %s attached to %s, but failed to start: %s.\n",
521 devname, chosen_name, strerror(errno));
522 rv = 1;
523 }
524 } else {
525 if (verbose >= 0)
526 fprintf(stderr, Name
527 ": %s attached to %s, not enough to start safely.\n",
528 devname, chosen_name);
529 rv = 0;
530 }
531 close(mdfd);
532 return rv;
533 }
534
535 static void find_reject(int mdfd, struct supertype *st, struct mdinfo *sra,
536 int number, __u64 events, int verbose,
537 char *array_name)
538 {
539 /* Find a device attached to this array with a disk.number of number
540 * and events less than the passed events, and remove the device.
541 */
542 struct mdinfo *d;
543 mdu_array_info_t ra;
544
545 if (ioctl(mdfd, GET_ARRAY_INFO, &ra) == 0)
546 return; /* not safe to remove from active arrays
547 * without thinking more */
548
549 for (d = sra->devs; d ; d = d->next) {
550 char dn[10];
551 int dfd;
552 struct mdinfo info;
553 sprintf(dn, "%d:%d", d->disk.major, d->disk.minor);
554 dfd = dev_open(dn, O_RDONLY);
555 if (dfd < 0)
556 continue;
557 if (st->ss->load_super(st, dfd, NULL)) {
558 close(dfd);
559 continue;
560 }
561 st->ss->getinfo_super(st, &info);
562 st->ss->free_super(st);
563 close(dfd);
564
565 if (info.disk.number != number ||
566 info.events >= events)
567 continue;
568
569 if (d->disk.raid_disk > -1)
570 sysfs_set_str(sra, d, "slot", "none");
571 if (sysfs_set_str(sra, d, "state", "remove") == 0)
572 if (verbose >= 0)
573 fprintf(stderr, Name
574 ": removing old device %s from %s\n",
575 d->sys_name+4, array_name);
576 }
577 }
578
579 static int count_active(struct supertype *st, int mdfd, char **availp,
580 struct mdinfo *bestinfo)
581 {
582 /* count how many devices in sra think they are active */
583 struct mdinfo *d;
584 int cnt = 0, cnt1 = 0;
585 __u64 max_events = 0;
586 struct mdinfo *sra = sysfs_read(mdfd, -1, GET_DEVS | GET_STATE);
587 char *avail = NULL;
588
589 for (d = sra->devs ; d ; d = d->next) {
590 char dn[30];
591 int dfd;
592 int ok;
593 struct mdinfo info;
594
595 sprintf(dn, "%d:%d", d->disk.major, d->disk.minor);
596 dfd = dev_open(dn, O_RDONLY);
597 if (dfd < 0)
598 continue;
599 ok = st->ss->load_super(st, dfd, NULL);
600 close(dfd);
601 if (ok != 0)
602 continue;
603 st->ss->getinfo_super(st, &info);
604 if (!avail) {
605 avail = malloc(info.array.raid_disks);
606 if (!avail) {
607 fprintf(stderr, Name ": out of memory.\n");
608 exit(1);
609 }
610 memset(avail, 0, info.array.raid_disks);
611 *availp = avail;
612 }
613
614 if (info.disk.state & (1<<MD_DISK_SYNC))
615 {
616 if (cnt == 0) {
617 cnt++;
618 max_events = info.events;
619 avail[info.disk.raid_disk] = 2;
620 st->ss->getinfo_super(st, bestinfo);
621 } else if (info.events == max_events) {
622 cnt++;
623 avail[info.disk.raid_disk] = 2;
624 } else if (info.events == max_events-1) {
625 cnt1++;
626 avail[info.disk.raid_disk] = 1;
627 } else if (info.events < max_events - 1)
628 ;
629 else if (info.events == max_events+1) {
630 int i;
631 cnt1 = cnt;
632 cnt = 1;
633 max_events = info.events;
634 for (i=0; i<info.array.raid_disks; i++)
635 if (avail[i])
636 avail[i]--;
637 avail[info.disk.raid_disk] = 2;
638 st->ss->getinfo_super(st, bestinfo);
639 } else { /* info.events much bigger */
640 cnt = 1; cnt1 = 0;
641 memset(avail, 0, info.disk.raid_disk);
642 max_events = info.events;
643 st->ss->getinfo_super(st, bestinfo);
644 }
645 }
646 st->ss->free_super(st);
647 }
648 return cnt + cnt1;
649 }
650
651 int IncrementalScan(int verbose)
652 {
653 /* look at every device listed in the 'map' file.
654 * If one is found that is not running then:
655 * look in mdadm.conf for bitmap file.
656 * if one exists, but array has none, add it.
657 * try to start array in auto-readonly mode
658 */
659 struct map_ent *mapl = NULL;
660 struct map_ent *me;
661 mddev_ident_t devs, mddev;
662 int rv = 0;
663
664 map_read(&mapl);
665 devs = conf_get_ident(NULL);
666
667 for (me = mapl ; me ; me = me->next) {
668 mdu_array_info_t array;
669 mdu_bitmap_file_t bmf;
670 struct mdinfo *sra;
671 int mdfd = open_dev(me->devnum);
672
673 if (mdfd < 0)
674 continue;
675 if (ioctl(mdfd, GET_ARRAY_INFO, &array) == 0 ||
676 errno != ENODEV) {
677 close(mdfd);
678 continue;
679 }
680 /* Ok, we can try this one. Maybe it needs a bitmap */
681 for (mddev = devs ; mddev ; mddev = mddev->next)
682 if (mddev->devname && me->path
683 && devname_matches(mddev->devname, me->path))
684 break;
685 if (mddev && mddev->bitmap_file) {
686 /*
687 * Note: early kernels will wrongly fail this, so it
688 * is a hint only
689 */
690 int added = -1;
691 if (ioctl(mdfd, GET_ARRAY_INFO, &bmf) < 0) {
692 int bmfd = open(mddev->bitmap_file, O_RDWR);
693 if (bmfd >= 0) {
694 added = ioctl(mdfd, SET_BITMAP_FILE,
695 bmfd);
696 close(bmfd);
697 }
698 }
699 if (verbose >= 0) {
700 if (added == 0)
701 fprintf(stderr, Name
702 ": Added bitmap %s to %s\n",
703 mddev->bitmap_file, me->path);
704 else if (errno != EEXIST)
705 fprintf(stderr, Name
706 ": Failed to add bitmap to %s: %s\n",
707 me->path, strerror(errno));
708 }
709 }
710 sra = sysfs_read(mdfd, 0, 0);
711 if (sra) {
712 if (sysfs_set_str(sra, NULL,
713 "array_state", "read-auto") == 0) {
714 if (verbose >= 0)
715 fprintf(stderr, Name
716 ": started array %s\n",
717 me->path ?: devnum2devname(me->devnum));
718 } else {
719 fprintf(stderr, Name
720 ": failed to start array %s: %s\n",
721 me->path ?: devnum2devname(me->devnum),
722 strerror(errno));
723 rv = 1;
724 }
725 }
726 }
727 return rv;
728 }
729
730 static char *container2devname(char *devname)
731 {
732 char *mdname = NULL;
733
734 if (devname[0] == '/') {
735 int fd = open(devname, O_RDONLY);
736 if (fd >= 0) {
737 mdname = devnum2devname(fd2devnum(fd));
738 close(fd);
739 }
740 } else {
741 int uuid[4];
742 struct map_ent *mp, *map = NULL;
743
744 if (!parse_uuid(devname, uuid))
745 return mdname;
746 mp = map_by_uuid(&map, uuid);
747 if (mp)
748 mdname = devnum2devname(mp->devnum);
749 map_free(map);
750 }
751
752 return mdname;
753 }
754
755 int Incremental_container(struct supertype *st, char *devname, int verbose,
756 int runstop, int autof, int trustworthy)
757 {
758 /* Collect the contents of this container and for each
759 * array, choose a device name and assemble the array.
760 */
761
762 struct mdinfo *list = st->ss->container_content(st);
763 struct mdinfo *ra;
764 struct map_ent *map = NULL;
765
766 map_lock(&map);
767
768 for (ra = list ; ra ; ra = ra->next) {
769 int mdfd;
770 char chosen_name[1024];
771 struct map_ent *mp;
772 struct mddev_ident_s *match = NULL;
773
774 mp = map_by_uuid(&map, ra->uuid);
775
776 if (mp) {
777 mdfd = open_dev(mp->devnum);
778 if (mp->path)
779 strcpy(chosen_name, mp->path);
780 else
781 strcpy(chosen_name, devnum2devname(mp->devnum));
782 } else {
783
784 /* Check in mdadm.conf for container == devname and
785 * member == ra->text_version after second slash.
786 */
787 char *sub = strchr(ra->text_version+1, '/');
788 struct mddev_ident_s *array_list;
789 if (sub) {
790 sub++;
791 array_list = conf_get_ident(NULL);
792 } else
793 array_list = NULL;
794 for(; array_list ; array_list = array_list->next) {
795 char *dn;
796 if (array_list->member == NULL ||
797 array_list->container == NULL)
798 continue;
799 if (strcmp(array_list->member, sub) != 0)
800 continue;
801 if (array_list->uuid_set &&
802 !same_uuid(ra->uuid, array_list->uuid, st->ss->swapuuid))
803 continue;
804 dn = container2devname(array_list->container);
805 if (dn == NULL)
806 continue;
807 if (strncmp(dn, ra->text_version+1,
808 strlen(dn)) != 0 ||
809 ra->text_version[strlen(dn)+1] != '/') {
810 free(dn);
811 continue;
812 }
813 free(dn);
814 /* we have a match */
815 match = array_list;
816 if (verbose>0)
817 fprintf(stderr, Name ": match found for member %s\n",
818 array_list->member);
819 break;
820 }
821
822 if (match && match->devname &&
823 strcasecmp(match->devname, "<ignore>") == 0) {
824 if (verbose > 0)
825 fprintf(stderr, Name ": array %s/%s is "
826 "explicitly ignored by mdadm.conf\n",
827 match->container, match->member);
828 return 2;
829 }
830 if (match)
831 trustworthy = LOCAL;
832
833 mdfd = create_mddev(match ? match->devname : NULL,
834 ra->name,
835 autof,
836 trustworthy,
837 chosen_name);
838 }
839
840 if (mdfd < 0) {
841 fprintf(stderr, Name ": failed to open %s: %s.\n",
842 chosen_name, strerror(errno));
843 return 2;
844 }
845
846 assemble_container_content(st, mdfd, ra, runstop,
847 chosen_name, verbose);
848 }
849 map_unlock(&map);
850 return 0;
851 }
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