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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 #include <dirent.h>
33 #include <ctype.h>
34
35 static int count_active(struct supertype *st, struct mdinfo *sra,
36 int mdfd, char **availp,
37 struct mdinfo *info);
38 static void find_reject(int mdfd, struct supertype *st, struct mdinfo *sra,
39 int number, __u64 events, int verbose,
40 char *array_name);
41 static int try_spare(char *devname, int *dfdp, struct dev_policy *pol,
42 struct map_ent *target,
43 struct supertype *st, int verbose);
44
45 static int Incremental_container(struct supertype *st, char *devname,
46 char *homehost,
47 int verbose, int runstop, int autof);
48
49 static struct mddev_ident *search_mdstat(struct supertype *st,
50 struct mdinfo *info,
51 char *devname,
52 int verbose, int *rvp);
53
54 int Incremental(char *devname, int verbose, int runstop,
55 struct supertype *st, char *homehost, int require_homehost,
56 int autof)
57 {
58 /* Add this device to an array, creating the array if necessary
59 * and starting the array if sensible or - if runstop>0 - if possible.
60 *
61 * This has several steps:
62 *
63 * 1/ Check if device is permitted by mdadm.conf, reject if not.
64 * 2/ Find metadata, reject if none appropriate (check
65 * version/name from args)
66 * 3/ Check if there is a match in mdadm.conf
67 * 3a/ if not, check for homehost match. If no match, assemble as
68 * a 'foreign' array.
69 * 4/ Determine device number.
70 * - If in mdadm.conf with std name, use that
71 * - UUID in /var/run/mdadm.map use that
72 * - If name is suggestive, use that. unless in use with different uuid.
73 * - Choose a free, high number.
74 * - Use a partitioned device unless strong suggestion not to.
75 * e.g. auto=md
76 * Don't choose partitioned for containers.
77 * 5/ Find out if array already exists
78 * 5a/ if it does not
79 * - choose a name, from mdadm.conf or 'name' field in array.
80 * - create the array
81 * - add the device
82 * 5b/ if it does
83 * - check one drive in array to make sure metadata is a reasonably
84 * close match. Reject if not (e.g. different type)
85 * - add the device
86 * 6/ Make sure /var/run/mdadm.map contains this array.
87 * 7/ Is there enough devices to possibly start the array?
88 * For a container, this means running Incremental_container.
89 * 7a/ if not, finish with success.
90 * 7b/ if yes,
91 * - read all metadata and arrange devices like -A does
92 * - if number of OK devices match expected, or -R and there are enough,
93 * start the array (auto-readonly).
94 */
95 struct stat stb;
96 struct mdinfo info, dinfo;
97 struct mdinfo *sra = NULL, *d;
98 struct mddev_ident *match;
99 char chosen_name[1024];
100 int rv = 1;
101 struct map_ent *mp, *map = NULL;
102 int dfd = -1, mdfd = -1;
103 char *avail = NULL;
104 int active_disks;
105 int trustworthy;
106 char *name_to_use;
107 mdu_array_info_t ainf;
108 struct dev_policy *policy = NULL;
109 struct map_ent target_array;
110 int have_target;
111
112 struct createinfo *ci = conf_get_create_info();
113
114 if (stat(devname, &stb) < 0) {
115 if (verbose >= 0)
116 fprintf(stderr, Name ": stat failed for %s: %s.\n",
117 devname, strerror(errno));
118 return rv;
119 }
120 if ((stb.st_mode & S_IFMT) != S_IFBLK) {
121 if (verbose >= 0)
122 fprintf(stderr, Name ": %s is not a block device.\n",
123 devname);
124 return rv;
125 }
126 dfd = dev_open(devname, O_RDONLY|O_EXCL);
127 if (dfd < 0) {
128 if (verbose >= 0)
129 fprintf(stderr, Name ": cannot open %s: %s.\n",
130 devname, strerror(errno));
131 return rv;
132 }
133 /* If the device is a container, we do something very different */
134 if (must_be_container(dfd)) {
135 if (!st)
136 st = super_by_fd(dfd, NULL);
137 if (st && st->ss->load_container)
138 rv = st->ss->load_container(st, dfd, NULL);
139
140 close(dfd);
141 if (!rv && st->ss->container_content)
142 return Incremental_container(st, devname, homehost,
143 verbose, runstop, autof);
144
145 fprintf(stderr, Name ": %s is not part of an md array.\n",
146 devname);
147 return rv;
148 }
149
150 /* 1/ Check if device is permitted by mdadm.conf */
151
152 if (!conf_test_dev(devname)) {
153 if (verbose >= 0)
154 fprintf(stderr, Name
155 ": %s not permitted by mdadm.conf.\n",
156 devname);
157 goto out;
158 }
159
160 /* 2/ Find metadata, reject if none appropriate (check
161 * version/name from args) */
162
163 if (fstat(dfd, &stb) < 0) {
164 if (verbose >= 0)
165 fprintf(stderr, Name ": fstat failed for %s: %s.\n",
166 devname, strerror(errno));
167 goto out;
168 }
169 if ((stb.st_mode & S_IFMT) != S_IFBLK) {
170 if (verbose >= 0)
171 fprintf(stderr, Name ": %s is not a block device.\n",
172 devname);
173 goto out;
174 }
175
176 dinfo.disk.major = major(stb.st_rdev);
177 dinfo.disk.minor = minor(stb.st_rdev);
178
179 policy = disk_policy(&dinfo);
180 have_target = policy_check_path(&dinfo, &target_array);
181
182 if (st == NULL && (st = guess_super(dfd)) == NULL) {
183 if (verbose >= 0)
184 fprintf(stderr, Name
185 ": no recognisable superblock on %s.\n",
186 devname);
187 rv = try_spare(devname, &dfd, policy,
188 have_target ? &target_array : NULL,
189 st, verbose);
190 goto out;
191 }
192 if (st->ss->compare_super == NULL ||
193 st->ss->load_super(st, dfd, NULL)) {
194 if (verbose >= 0)
195 fprintf(stderr, Name ": no RAID superblock on %s.\n",
196 devname);
197 rv = try_spare(devname, &dfd, policy,
198 have_target ? &target_array : NULL,
199 st, verbose);
200 free(st);
201 goto out;
202 }
203 close (dfd); dfd = -1;
204
205 memset(&info, 0, sizeof(info));
206 st->ss->getinfo_super(st, &info, NULL);
207
208 /* 3/ Check if there is a match in mdadm.conf */
209 match = search_mdstat(st, &info, devname, verbose, &rv);
210 if (!match && rv == 2)
211 goto out;
212
213 if (match && match->devname
214 && strcasecmp(match->devname, "<ignore>") == 0) {
215 if (verbose >= 0)
216 fprintf(stderr, Name ": array containing %s is explicitly"
217 " ignored by mdadm.conf\n",
218 devname);
219 goto out;
220 }
221
222 /* 3a/ if not, check for homehost match. If no match, continue
223 * but don't trust the 'name' in the array. Thus a 'random' minor
224 * number will be assigned, and the device name will be based
225 * on that. */
226 if (match)
227 trustworthy = LOCAL;
228 else if (st->ss->match_home(st, homehost) == 1)
229 trustworthy = LOCAL;
230 else if (st->ss->match_home(st, "any") == 1)
231 trustworthy = LOCAL_ANY;
232 else
233 trustworthy = FOREIGN;
234
235
236 if (!match && !conf_test_metadata(st->ss->name, policy,
237 (trustworthy == LOCAL))) {
238 if (verbose >= 1)
239 fprintf(stderr, Name
240 ": %s has metadata type %s for which "
241 "auto-assembly is disabled\n",
242 devname, st->ss->name);
243 goto out;
244 }
245 if (trustworthy == LOCAL_ANY)
246 trustworthy = LOCAL;
247
248 /* There are three possible sources for 'autof': command line,
249 * ARRAY line in mdadm.conf, or CREATE line in mdadm.conf.
250 * ARRAY takes precedence, then command line, then
251 * CREATE.
252 */
253 if (match && match->autof)
254 autof = match->autof;
255 if (autof == 0)
256 autof = ci->autof;
257
258 name_to_use = info.name;
259 if (name_to_use[0] == 0 &&
260 info.array.level == LEVEL_CONTAINER &&
261 trustworthy == LOCAL) {
262 name_to_use = info.text_version;
263 trustworthy = METADATA;
264 }
265 if (name_to_use[0] && trustworthy != LOCAL &&
266 ! require_homehost &&
267 conf_name_is_free(name_to_use))
268 trustworthy = LOCAL;
269
270 /* strip "hostname:" prefix from name if we have decided
271 * to treat it as LOCAL
272 */
273 if (trustworthy == LOCAL && strchr(name_to_use, ':') != NULL)
274 name_to_use = strchr(name_to_use, ':')+1;
275
276 /* 4/ Check if array exists.
277 */
278 if (map_lock(&map))
279 fprintf(stderr, Name ": failed to get exclusive lock on "
280 "mapfile\n");
281 mp = map_by_uuid(&map, info.uuid);
282 if (mp)
283 mdfd = open_dev(mp->devnum);
284 else
285 mdfd = -1;
286
287 if (mdfd < 0) {
288
289 /* Couldn't find an existing array, maybe make a new one */
290 mdfd = create_mddev(match ? match->devname : NULL,
291 name_to_use, autof, trustworthy, chosen_name);
292
293 if (mdfd < 0)
294 goto out;
295
296 sysfs_init(&info, mdfd, 0);
297
298 if (set_array_info(mdfd, st, &info) != 0) {
299 fprintf(stderr, Name ": failed to set array info for %s: %s\n",
300 chosen_name, strerror(errno));
301 rv = 2;
302 goto out;
303 }
304
305 dinfo = info;
306 dinfo.disk.major = major(stb.st_rdev);
307 dinfo.disk.minor = minor(stb.st_rdev);
308 if (add_disk(mdfd, st, &info, &dinfo) != 0) {
309 fprintf(stderr, Name ": failed to add %s to %s: %s.\n",
310 devname, chosen_name, strerror(errno));
311 ioctl(mdfd, STOP_ARRAY, 0);
312 rv = 2;
313 goto out;
314 }
315 sra = sysfs_read(mdfd, -1, (GET_DEVS | GET_STATE |
316 GET_OFFSET | GET_SIZE));
317
318 if (!sra || !sra->devs || sra->devs->disk.raid_disk >= 0) {
319 /* It really should be 'none' - must be old buggy
320 * kernel, and mdadm -I may not be able to complete.
321 * So reject it.
322 */
323 ioctl(mdfd, STOP_ARRAY, NULL);
324 fprintf(stderr, Name
325 ": You have an old buggy kernel which cannot support\n"
326 " --incremental reliably. Aborting.\n");
327 sysfs_free(sra);
328 rv = 2;
329 goto out;
330 }
331 info.array.working_disks = 1;
332 /* 6/ Make sure /var/run/mdadm.map contains this array. */
333 map_update(&map, fd2devnum(mdfd),
334 info.text_version,
335 info.uuid, chosen_name);
336 } else {
337 /* 5b/ if it does */
338 /* - check one drive in array to make sure metadata is a reasonably */
339 /* close match. Reject if not (e.g. different type) */
340 /* - add the device */
341 char dn[20];
342 int dfd2;
343 int err;
344 struct supertype *st2;
345 struct mdinfo info2, *d;
346
347 sra = sysfs_read(mdfd, -1, (GET_DEVS | GET_STATE |
348 GET_OFFSET | GET_SIZE));
349
350 if (mp->path)
351 strcpy(chosen_name, mp->path);
352 else
353 strcpy(chosen_name, devnum2devname(mp->devnum));
354
355 /* It is generally not OK to add non-spare drives to a
356 * running array as they are probably missing because
357 * they failed. However if runstop is 1, then the
358 * array was possibly started early and our best bet is
359 * to add this anyway.
360 * Also if action policy is re-add or better we allow
361 * re-add
362 */
363 if ((info.disk.state & (1<<MD_DISK_SYNC)) != 0
364 && ! policy_action_allows(policy, st->ss->name,
365 act_re_add)
366 && runstop < 1) {
367 int active = 0;
368
369 if (st->ss->external) {
370 char *devname = devnum2devname(fd2devnum(mdfd));
371
372 active = devname && is_container_active(devname);
373 free(devname);
374 } else if (ioctl(mdfd, GET_ARRAY_INFO, &ainf) == 0)
375 active = 1;
376 if (active) {
377 fprintf(stderr, Name
378 ": not adding %s to active array (without --run) %s\n",
379 devname, chosen_name);
380 rv = 2;
381 goto out;
382 }
383 }
384 if (!sra) {
385 rv = 2;
386 goto out;
387 }
388 if (sra->devs) {
389 sprintf(dn, "%d:%d", sra->devs->disk.major,
390 sra->devs->disk.minor);
391 dfd2 = dev_open(dn, O_RDONLY);
392 st2 = dup_super(st);
393 if (st2->ss->load_super(st2, dfd2, NULL) ||
394 st->ss->compare_super(st, st2) != 0) {
395 fprintf(stderr, Name
396 ": metadata mismatch between %s and "
397 "chosen array %s\n",
398 devname, chosen_name);
399 close(dfd2);
400 rv = 2;
401 goto out;
402 }
403 close(dfd2);
404 memset(&info2, 0, sizeof(info2));
405 st2->ss->getinfo_super(st2, &info2, NULL);
406 st2->ss->free_super(st2);
407 if (info.array.level != info2.array.level ||
408 memcmp(info.uuid, info2.uuid, 16) != 0 ||
409 info.array.raid_disks != info2.array.raid_disks) {
410 fprintf(stderr, Name
411 ": unexpected difference between %s and %s.\n",
412 chosen_name, devname);
413 rv = 2;
414 goto out;
415 }
416 }
417 info2.disk.major = major(stb.st_rdev);
418 info2.disk.minor = minor(stb.st_rdev);
419 /* add disk needs to know about containers */
420 if (st->ss->external)
421 sra->array.level = LEVEL_CONTAINER;
422 err = add_disk(mdfd, st, sra, &info2);
423 if (err < 0 && errno == EBUSY) {
424 /* could be another device present with the same
425 * disk.number. Find and reject any such
426 */
427 find_reject(mdfd, st, sra, info.disk.number,
428 info.events, verbose, chosen_name);
429 err = add_disk(mdfd, st, sra, &info2);
430 }
431 if (err < 0) {
432 fprintf(stderr, Name ": failed to add %s to %s: %s.\n",
433 devname, chosen_name, strerror(errno));
434 rv = 2;
435 goto out;
436 }
437 info.array.working_disks = 0;
438 for (d = sra->devs; d; d=d->next)
439 info.array.working_disks ++;
440
441 }
442
443 /* 7/ Is there enough devices to possibly start the array? */
444 /* 7a/ if not, finish with success. */
445 if (info.array.level == LEVEL_CONTAINER) {
446 char *devname = NULL;
447 /* Try to assemble within the container */
448 map_unlock(&map);
449 sysfs_uevent(&info, "change");
450 if (verbose >= 0)
451 fprintf(stderr, Name
452 ": container %s now has %d devices\n",
453 chosen_name, info.array.working_disks);
454 wait_for(chosen_name, mdfd);
455 if (st->ss->external)
456 devname = devnum2devname(fd2devnum(mdfd));
457 close(mdfd);
458 sysfs_free(sra);
459 rv = Incremental(chosen_name, verbose, runstop,
460 NULL, homehost, require_homehost, autof);
461 if (rv == 1)
462 /* Don't fail the whole -I if a subarray didn't
463 * have enough devices to start yet
464 */
465 rv = 0;
466 /* after spare is added, ping monitor for external metadata
467 * so that it can eg. try to rebuild degraded array */
468 if (st->ss->external) {
469 ping_monitor(devname);
470 free(devname);
471 }
472 return rv;
473 }
474
475 /* We have added something to the array, so need to re-read the
476 * state. Eventually this state should be kept up-to-date as
477 * things change.
478 */
479 sysfs_free(sra);
480 sra = sysfs_read(mdfd, -1, (GET_DEVS | GET_STATE |
481 GET_OFFSET | GET_SIZE));
482 active_disks = count_active(st, sra, mdfd, &avail, &info);
483 if (enough(info.array.level, info.array.raid_disks,
484 info.array.layout, info.array.state & 1,
485 avail, active_disks) == 0) {
486 if (verbose >= 0)
487 fprintf(stderr, Name
488 ": %s attached to %s, not enough to start (%d).\n",
489 devname, chosen_name, active_disks);
490 map_unlock(&map);
491 rv = 0;
492 goto out;
493 }
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 *dsk;
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 /* Need to remove from the array any devices which
533 * 'count_active' discerned were too old or inappropriate
534 */
535 for (d = sra ? sra->devs : NULL ; d ; d = d->next)
536 if (d->disk.state & (1<<MD_DISK_REMOVED))
537 remove_disk(mdfd, st, sra, d);
538
539 if ((sra == NULL || active_disks >= info.array.working_disks)
540 && trustworthy != FOREIGN)
541 rv = ioctl(mdfd, RUN_ARRAY, NULL);
542 else
543 rv = sysfs_set_str(sra, NULL,
544 "array_state", "read-auto");
545 if (rv == 0) {
546 if (verbose >= 0)
547 fprintf(stderr, Name
548 ": %s attached to %s, which has been started.\n",
549 devname, chosen_name);
550 rv = 0;
551 wait_for(chosen_name, mdfd);
552 /* We just started the array, so some devices
553 * might have been evicted from the array
554 * because their event counts were too old.
555 * If the action=re-add policy is in-force for
556 * those devices we should re-add them now.
557 */
558 for (dsk = sra->devs; dsk ; dsk = dsk->next) {
559 if (disk_action_allows(dsk, st->ss->name, act_re_add) &&
560 add_disk(mdfd, st, sra, dsk) == 0)
561 fprintf(stderr, Name
562 ": %s re-added to %s\n",
563 dsk->sys_name, chosen_name);
564 }
565 } else {
566 fprintf(stderr, Name
567 ": %s attached to %s, but failed to start: %s.\n",
568 devname, chosen_name, strerror(errno));
569 rv = 1;
570 }
571 } else {
572 if (verbose >= 0)
573 fprintf(stderr, Name
574 ": %s attached to %s, not enough to start safely.\n",
575 devname, chosen_name);
576 rv = 0;
577 }
578 out:
579 free(avail);
580 if (dfd >= 0)
581 close(dfd);
582 if (mdfd >= 0)
583 close(mdfd);
584 if (policy)
585 dev_policy_free(policy);
586 if (sra)
587 sysfs_free(sra);
588 return rv;
589 }
590
591 static struct mddev_ident *search_mdstat(struct supertype *st,
592 struct mdinfo *info,
593 char *devname,
594 int verbose, int *rvp)
595 {
596 struct mddev_ident *array_list, *match;
597 array_list = conf_get_ident(NULL);
598 match = NULL;
599 for (; array_list; array_list = array_list->next) {
600 if (array_list->uuid_set &&
601 same_uuid(array_list->uuid, info->uuid, st->ss->swapuuid)
602 == 0) {
603 if (verbose >= 2 && array_list->devname)
604 fprintf(stderr, Name
605 ": UUID differs from %s.\n",
606 array_list->devname);
607 continue;
608 }
609 if (array_list->name[0] &&
610 strcasecmp(array_list->name, info->name) != 0) {
611 if (verbose >= 2 && array_list->devname)
612 fprintf(stderr, Name
613 ": Name differs from %s.\n",
614 array_list->devname);
615 continue;
616 }
617 if (array_list->devices &&
618 !match_oneof(array_list->devices, devname)) {
619 if (verbose >= 2 && array_list->devname)
620 fprintf(stderr, Name
621 ": Not a listed device for %s.\n",
622 array_list->devname);
623 continue;
624 }
625 if (array_list->super_minor != UnSet &&
626 array_list->super_minor != info->array.md_minor) {
627 if (verbose >= 2 && array_list->devname)
628 fprintf(stderr, Name
629 ": Different super-minor to %s.\n",
630 array_list->devname);
631 continue;
632 }
633 if (!array_list->uuid_set &&
634 !array_list->name[0] &&
635 !array_list->devices &&
636 array_list->super_minor == UnSet) {
637 if (verbose >= 2 && array_list->devname)
638 fprintf(stderr, Name
639 ": %s doesn't have any identifying information.\n",
640 array_list->devname);
641 continue;
642 }
643 /* FIXME, should I check raid_disks and level too?? */
644
645 if (match) {
646 if (verbose >= 0) {
647 if (match->devname && array_list->devname)
648 fprintf(stderr, Name
649 ": we match both %s and %s - cannot decide which to use.\n",
650 match->devname, array_list->devname);
651 else
652 fprintf(stderr, Name
653 ": multiple lines in mdadm.conf match\n");
654 }
655 *rvp = 2;
656 match = NULL;
657 break;
658 }
659 match = array_list;
660 }
661 return match;
662 }
663
664 static void find_reject(int mdfd, struct supertype *st, struct mdinfo *sra,
665 int number, __u64 events, int verbose,
666 char *array_name)
667 {
668 /* Find a device attached to this array with a disk.number of number
669 * and events less than the passed events, and remove the device.
670 */
671 struct mdinfo *d;
672 mdu_array_info_t ra;
673
674 if (ioctl(mdfd, GET_ARRAY_INFO, &ra) == 0)
675 return; /* not safe to remove from active arrays
676 * without thinking more */
677
678 for (d = sra->devs; d ; d = d->next) {
679 char dn[10];
680 int dfd;
681 struct mdinfo info;
682 sprintf(dn, "%d:%d", d->disk.major, d->disk.minor);
683 dfd = dev_open(dn, O_RDONLY);
684 if (dfd < 0)
685 continue;
686 if (st->ss->load_super(st, dfd, NULL)) {
687 close(dfd);
688 continue;
689 }
690 st->ss->getinfo_super(st, &info, NULL);
691 st->ss->free_super(st);
692 close(dfd);
693
694 if (info.disk.number != number ||
695 info.events >= events)
696 continue;
697
698 if (d->disk.raid_disk > -1)
699 sysfs_set_str(sra, d, "slot", "none");
700 if (sysfs_set_str(sra, d, "state", "remove") == 0)
701 if (verbose >= 0)
702 fprintf(stderr, Name
703 ": removing old device %s from %s\n",
704 d->sys_name+4, array_name);
705 }
706 }
707
708 static int count_active(struct supertype *st, struct mdinfo *sra,
709 int mdfd, char **availp,
710 struct mdinfo *bestinfo)
711 {
712 /* count how many devices in sra think they are active */
713 struct mdinfo *d;
714 int cnt = 0;
715 __u64 max_events = 0;
716 char *avail = NULL;
717 int *best;
718 char *devmap = NULL;
719 int numdevs = 0;
720 int devnum;
721 int b, i;
722 int raid_disks = 0;
723
724 if (!sra)
725 return 0;
726
727 for (d = sra->devs ; d ; d = d->next)
728 numdevs++;
729 for (d = sra->devs, devnum=0 ; d ; d = d->next, devnum++) {
730 char dn[30];
731 int dfd;
732 int ok;
733 struct mdinfo info;
734
735 sprintf(dn, "%d:%d", d->disk.major, d->disk.minor);
736 dfd = dev_open(dn, O_RDONLY);
737 if (dfd < 0)
738 continue;
739 ok = st->ss->load_super(st, dfd, NULL);
740 close(dfd);
741 if (ok != 0)
742 continue;
743 info.array.raid_disks = raid_disks;
744 st->ss->getinfo_super(st, &info, devmap + raid_disks * devnum);
745 if (!avail) {
746 raid_disks = info.array.raid_disks;
747 avail = calloc(raid_disks, 1);
748 if (!avail) {
749 fprintf(stderr, Name ": out of memory.\n");
750 exit(1);
751 }
752 *availp = avail;
753
754 best = calloc(raid_disks, sizeof(int));
755 devmap = calloc(raid_disks * numdevs, 1);
756
757 st->ss->getinfo_super(st, &info, devmap);
758 }
759
760 if (info.disk.state & (1<<MD_DISK_SYNC))
761 {
762 if (cnt == 0) {
763 cnt++;
764 max_events = info.events;
765 avail[info.disk.raid_disk] = 2;
766 best[info.disk.raid_disk] = devnum;
767 st->ss->getinfo_super(st, bestinfo, NULL);
768 } else if (info.events == max_events) {
769 avail[info.disk.raid_disk] = 2;
770 best[info.disk.raid_disk] = devnum;
771 } else if (info.events == max_events-1) {
772 if (avail[info.disk.raid_disk] == 0) {
773 avail[info.disk.raid_disk] = 1;
774 best[info.disk.raid_disk] = devnum;
775 }
776 } else if (info.events < max_events - 1)
777 ;
778 else if (info.events == max_events+1) {
779 int i;
780 max_events = info.events;
781 for (i=0; i < raid_disks; i++)
782 if (avail[i])
783 avail[i]--;
784 avail[info.disk.raid_disk] = 2;
785 best[info.disk.raid_disk] = devnum;
786 st->ss->getinfo_super(st, bestinfo, NULL);
787 } else { /* info.events much bigger */
788 memset(avail, 0, info.disk.raid_disk);
789 max_events = info.events;
790 avail[info.disk.raid_disk] = 2;
791 st->ss->getinfo_super(st, bestinfo, NULL);
792 }
793 }
794 st->ss->free_super(st);
795 }
796 if (!avail)
797 return 0;
798 /* We need to reject any device that thinks the best device is
799 * failed or missing */
800 for (b = 0; b < raid_disks; b++)
801 if (avail[b] == 2)
802 break;
803 cnt = 0;
804 for (i = 0 ; i < raid_disks ; i++) {
805 if (i != b && avail[i])
806 if (devmap[raid_disks * best[i] + b] == 0) {
807 /* This device thinks 'b' is failed -
808 * don't use it */
809 devnum = best[i];
810 for (d=sra->devs ; devnum; d = d->next)
811 devnum--;
812 d->disk.state |= (1 << MD_DISK_REMOVED);
813 avail[i] = 0;
814 }
815 if (avail[i])
816 cnt++;
817 }
818 free(best);
819 free(devmap);
820 return cnt;
821 }
822
823 /* test if container has degraded member(s) */
824 static int container_members_max_degradation(struct map_ent *map, struct map_ent *me)
825 {
826 mdu_array_info_t array;
827 int afd;
828 int max_degraded = 0;
829
830 for(; map; map = map->next) {
831 if (!is_subarray(map->metadata) ||
832 devname2devnum(map->metadata+1) != me->devnum)
833 continue;
834 afd = open_dev(map->devnum);
835 if (afd < 0)
836 continue;
837 /* most accurate information regarding array degradation */
838 if (ioctl(afd, GET_ARRAY_INFO, &array) >= 0) {
839 int degraded = array.raid_disks - array.active_disks -
840 array.spare_disks;
841 if (degraded > max_degraded)
842 max_degraded = degraded;
843 }
844 close(afd);
845 }
846 return (max_degraded);
847 }
848
849 static int array_try_spare(char *devname, int *dfdp, struct dev_policy *pol,
850 struct map_ent *target, int bare,
851 struct supertype *st, int verbose)
852 {
853 /* This device doesn't have any md metadata
854 * The device policy allows 'spare' and if !bare, it allows spare-same-slot.
855 * If 'st' is not set, then we only know that some metadata allows this,
856 * others possibly don't.
857 * So look for a container or array to attach the device to.
858 * Prefer 'target' if that is set and the array is found.
859 *
860 * If st is set, then only arrays of that type are considered
861 * Return 0 on success, or some exit code on failure, probably 1.
862 */
863 int rv = 1;
864 struct stat stb;
865 struct map_ent *mp, *map = NULL;
866 struct mdinfo *chosen = NULL;
867 int dfd = *dfdp;
868
869 if (fstat(dfd, &stb) != 0)
870 return 1;
871
872 /*
873 * Now we need to find a suitable array to add this to.
874 * We only accept arrays that:
875 * - match 'st'
876 * - are in the same domains as the device
877 * - are of an size for which the device will be useful
878 * and we choose the one that is the most degraded
879 */
880
881 if (map_lock(&map)) {
882 fprintf(stderr, Name ": failed to get exclusive lock on "
883 "mapfile\n");
884 return 1;
885 }
886 for (mp = map ; mp ; mp = mp->next) {
887 struct supertype *st2;
888 struct domainlist *dl = NULL;
889 struct mdinfo *sra;
890 unsigned long long devsize;
891
892 if (is_subarray(mp->metadata))
893 continue;
894 if (st) {
895 st2 = st->ss->match_metadata_desc(mp->metadata);
896 if (!st2 ||
897 (st->minor_version >= 0 &&
898 st->minor_version != st2->minor_version)) {
899 if (verbose > 1)
900 fprintf(stderr, Name ": not adding %s to %s as metadata type doesn't match\n",
901 devname, mp->path);
902 free(st2);
903 continue;
904 }
905 free(st2);
906 }
907 sra = sysfs_read(-1, mp->devnum,
908 GET_DEVS|GET_OFFSET|GET_SIZE|GET_STATE|
909 GET_DEGRADED|GET_COMPONENT|GET_VERSION);
910 if (!sra) {
911 /* Probably a container - no degraded info */
912 sra = sysfs_read(-1, mp->devnum,
913 GET_DEVS|GET_OFFSET|GET_SIZE|GET_STATE|
914 GET_COMPONENT|GET_VERSION);
915 if (sra)
916 sra->array.failed_disks = -1;
917 }
918 if (!sra)
919 continue;
920 if (st == NULL) {
921 int i;
922 st2 = NULL;
923 for(i=0; !st2 && superlist[i]; i++)
924 st2 = superlist[i]->match_metadata_desc(
925 sra->text_version);
926 if (!st2) {
927 if (verbose > 1)
928 fprintf(stderr, Name ": not adding %s to %s"
929 " as metadata not recognised.\n",
930 devname, mp->path);
931 goto next;
932 }
933 /* Need to double check the 'act_spare' permissions applies
934 * to this metadata.
935 */
936 if (!policy_action_allows(pol, st2->ss->name, act_spare))
937 goto next;
938 if (!bare && !policy_action_allows(pol, st2->ss->name,
939 act_spare_same_slot))
940 goto next;
941 } else
942 st2 = st;
943 /* update number of failed disks for mostly degraded
944 * container member */
945 if (sra->array.failed_disks == -1)
946 sra->array.failed_disks = container_members_max_degradation(map, mp);
947
948 get_dev_size(dfd, NULL, &devsize);
949 if (st2->ss->avail_size(st2, devsize) < sra->component_size) {
950 if (verbose > 1)
951 fprintf(stderr, Name ": not adding %s to %s as it is too small\n",
952 devname, mp->path);
953 goto next;
954 }
955 /* test against target.
956 * If 'target' is set and 'bare' is false, we only accept
957 * arrays/containers that match 'target'.
958 * If 'target' is set and 'bare' is true, we prefer the
959 * array which matches 'target'.
960 * target is considered only if we deal with degraded array
961 */
962 if (target) {
963 if (strcmp(target->metadata, mp->metadata) == 0 &&
964 memcmp(target->uuid, mp->uuid,
965 sizeof(target->uuid)) == 0 &&
966 sra->array.failed_disks > 0) {
967 /* This is our target!! */
968 if (chosen)
969 sysfs_free(chosen);
970 chosen = sra;
971 sra = NULL;
972 /* skip to end so we don't check any more */
973 while (mp->next)
974 mp = mp->next;
975 goto next;
976 }
977 /* not our target */
978 if (!bare)
979 goto next;
980 }
981
982 dl = domain_from_array(sra, st2->ss->name);
983 if (!domain_test(dl, pol, st2->ss->name)) {
984 /* domain test fails */
985 if (verbose > 1)
986 fprintf(stderr, Name ": not adding %s to %s as"
987 " it is not in a compatible domain\n",
988 devname, mp->path);
989
990 goto next;
991 }
992 /* all tests passed, OK to add to this array */
993 if (!chosen) {
994 chosen = sra;
995 sra = NULL;
996 } else if (chosen->array.failed_disks < sra->array.failed_disks) {
997 sysfs_free(chosen);
998 chosen = sra;
999 sra = NULL;
1000 }
1001 next:
1002 if (sra)
1003 sysfs_free(sra);
1004 if (st != st2)
1005 free(st2);
1006 if (dl)
1007 domain_free(dl);
1008 }
1009 if (chosen) {
1010 /* add current device to chosen array as a spare */
1011 int mdfd = open_dev(devname2devnum(chosen->sys_name));
1012 if (mdfd >= 0) {
1013 struct mddev_dev devlist;
1014 char devname[20];
1015 devlist.next = NULL;
1016 devlist.used = 0;
1017 devlist.re_add = 0;
1018 devlist.writemostly = 0;
1019 devlist.devname = devname;
1020 sprintf(devname, "%d:%d", major(stb.st_rdev),
1021 minor(stb.st_rdev));
1022 devlist.disposition = 'a';
1023 close(dfd);
1024 *dfdp = -1;
1025 rv = Manage_subdevs(chosen->sys_name, mdfd, &devlist,
1026 -1, 0, NULL);
1027 close(mdfd);
1028 }
1029 if (verbose > 0) {
1030 if (rv == 0)
1031 fprintf(stderr, Name ": added %s as spare for %s\n",
1032 devname, chosen->sys_name);
1033 else
1034 fprintf(stderr, Name ": failed to add %s as spare for %s\n",
1035 devname, chosen->sys_name);
1036 }
1037 sysfs_free(chosen);
1038 }
1039 return rv;
1040 }
1041
1042 static int partition_try_spare(char *devname, int *dfdp, struct dev_policy *pol,
1043 struct supertype *st, int verbose)
1044 {
1045 /* we know that at least one partition virtual-metadata is
1046 * allowed to incorporate spares like this device. We need to
1047 * find a suitable device to copy partition information from.
1048 *
1049 * Getting a list of all disk (not partition) devices is
1050 * slightly non-trivial. We could look at /sys/block, but
1051 * that is theoretically due to be removed. Maybe best to use
1052 * /dev/disk/by-path/?* and ignore names ending '-partNN' as
1053 * we depend on this directory of 'path' info. But that fails
1054 * to find loop devices and probably others. Maybe don't
1055 * worry about that, they aren't the real target.
1056 *
1057 * So: check things in /dev/disk/by-path to see if they are in
1058 * a compatible domain, then load the partition table and see
1059 * if it is OK for the new device, and choose the largest
1060 * partition table that fits.
1061 */
1062 DIR *dir;
1063 struct dirent *de;
1064 char *chosen = NULL;
1065 unsigned long long chosen_size;
1066 struct supertype *chosen_st = NULL;
1067 int fd;
1068
1069 dir = opendir("/dev/disk/by-path");
1070 if (!dir)
1071 return 1;
1072 while ((de = readdir(dir)) != NULL) {
1073 char *ep;
1074 struct dev_policy *pol2 = NULL;
1075 struct domainlist *domlist = NULL;
1076 int fd = -1;
1077 struct mdinfo info;
1078 struct supertype *st2 = NULL;
1079 char *devname = NULL;
1080 unsigned long long devsectors;
1081
1082 if (de->d_ino == 0 ||
1083 de->d_name[0] == '.' ||
1084 (de->d_type != DT_LNK && de->d_type != DT_UNKNOWN))
1085 goto next;
1086
1087 ep = de->d_name + strlen(de->d_name);
1088 while (ep > de->d_name &&
1089 isdigit(ep[-1]))
1090 ep--;
1091 if (ep > de->d_name + 5 &&
1092 strncmp(ep-5, "-part", 5) == 0)
1093 /* This is a partition - skip it */
1094 goto next;
1095
1096 pol2 = path_policy(de->d_name, type_disk);
1097
1098 domain_merge(&domlist, pol2, st ? st->ss->name : NULL);
1099 if (domain_test(domlist, pol, st ? st->ss->name : NULL) == 0)
1100 /* new device is incompatible with this device. */
1101 goto next;
1102
1103 domain_free(domlist);
1104 domlist = NULL;
1105
1106 asprintf(&devname, "/dev/disk/by-path/%s", de->d_name);
1107 fd = open(devname, O_RDONLY);
1108 if (fd < 0)
1109 goto next;
1110 if (get_dev_size(fd, devname, &devsectors) == 0)
1111 goto next;
1112 devsectors >>= 9;
1113
1114 if (st)
1115 st2 = dup_super(st);
1116 else
1117 st2 = guess_super_type(fd, guess_partitions);
1118 if (st2 == NULL ||
1119 st2->ss->load_super(st2, fd, NULL) < 0)
1120 goto next;
1121
1122 if (!st) {
1123 /* Check domain policy again, this time referring to metadata */
1124 domain_merge(&domlist, pol2, st2->ss->name);
1125 if (domain_test(domlist, pol, st2->ss->name) == 0)
1126 /* Incompatible devices for this metadata type */
1127 goto next;
1128 if (!policy_action_allows(pol, st2->ss->name, act_spare))
1129 /* Some partition types allow sparing, but not
1130 * this one.
1131 */
1132 goto next;
1133 }
1134
1135 st2->ss->getinfo_super(st2, &info, NULL);
1136 if (info.component_size > devsectors)
1137 /* This partitioning doesn't fit in the device */
1138 goto next;
1139
1140 /* This is an acceptable device to copy partition
1141 * metadata from. We could just stop here, but I
1142 * think I want to keep looking incase a larger
1143 * metadata which makes better use of the device can
1144 * be found.
1145 */
1146 if (chosen == NULL ||
1147 chosen_size < info.component_size) {
1148 chosen_size = info.component_size;
1149 free(chosen);
1150 chosen = devname;
1151 devname = NULL;
1152 if (chosen_st) {
1153 chosen_st->ss->free_super(chosen_st);
1154 free(chosen_st);
1155 }
1156 chosen_st = st2;
1157 st2 = NULL;
1158 }
1159
1160 next:
1161 free(devname);
1162 domain_free(domlist);
1163 dev_policy_free(pol2);
1164 if (st2)
1165 st2->ss->free_super(st2);
1166 free(st2);
1167
1168 if (fd >= 0)
1169 close(fd);
1170 }
1171
1172 if (!chosen)
1173 return 1;
1174
1175 /* 'chosen' is the best device we can find. Let's write its
1176 * metadata to devname dfd is read-only so don't use that
1177 */
1178 fd = open(devname, O_RDWR);
1179 if (fd >= 0) {
1180 chosen_st->ss->store_super(chosen_st, fd);
1181 close(fd);
1182 }
1183 free(chosen);
1184 chosen_st->ss->free_super(chosen_st);
1185 free(chosen_st);
1186 return 0;
1187 }
1188
1189 static int is_bare(int dfd)
1190 {
1191 unsigned long long size = 0;
1192 char bufpad[4096 + 4096];
1193 char *buf = (char*)(((long)bufpad + 4096) & ~4095);
1194
1195 if (lseek(dfd, 0, SEEK_SET) != 0 ||
1196 read(dfd, buf, 4096) != 4096)
1197 return 0;
1198
1199 if (buf[0] != '\0' && buf[0] != '\x5a' && buf[0] != '\xff')
1200 return 0;
1201 if (memcmp(buf, buf+1, 4095) != 0)
1202 return 0;
1203
1204 /* OK, first 4K appear blank, try the end. */
1205 get_dev_size(dfd, NULL, &size);
1206 if (lseek(dfd, size-4096, SEEK_SET) < 0 ||
1207 read(dfd, buf, 4096) != 4096)
1208 return 0;
1209
1210 if (buf[0] != '\0' && buf[0] != '\x5a' && buf[0] != '\xff')
1211 return 0;
1212 if (memcmp(buf, buf+1, 4095) != 0)
1213 return 0;
1214
1215 return 1;
1216 }
1217
1218 /* adding a spare to a regular array is quite different from adding one to
1219 * a set-of-partitions virtual array.
1220 * This function determines which is worth trying and tries as appropriate.
1221 * Arrays are given priority over partitions.
1222 */
1223 static int try_spare(char *devname, int *dfdp, struct dev_policy *pol,
1224 struct map_ent *target,
1225 struct supertype *st, int verbose)
1226 {
1227 int i;
1228 int rv;
1229 int arrays_ok = 0;
1230 int partitions_ok = 0;
1231 int dfd = *dfdp;
1232 int bare;
1233
1234 /* Can only add a spare if device has at least one domain */
1235 if (pol_find(pol, pol_domain) == NULL)
1236 return 1;
1237 /* And only if some action allows spares */
1238 if (!policy_action_allows(pol, st?st->ss->name:NULL, act_spare))
1239 return 1;
1240
1241 /* Now check if the device is bare.
1242 * bare devices can always be added as a spare
1243 * non-bare devices can only be added if spare-same-slot is permitted,
1244 * and this device is replacing a previous device - in which case 'target'
1245 * will be set.
1246 */
1247 if (!is_bare(dfd)) {
1248 /* Must have a target and allow same_slot */
1249 /* Later - may allow force_spare without target */
1250 if (!target ||
1251 !policy_action_allows(pol, st?st->ss->name:NULL,
1252 act_spare_same_slot)) {
1253 if (verbose > 1)
1254 fprintf(stderr, Name ": %s is not bare, so not "
1255 "considering as a spare\n",
1256 devname);
1257 return 1;
1258 }
1259 bare = 0;
1260 } else
1261 bare = 1;
1262
1263 /* It might be OK to add this device to an array - need to see
1264 * what arrays might be candidates.
1265 */
1266 if (st) {
1267 /* just try try 'array' or 'partition' based on this metadata */
1268 if (st->ss->add_to_super)
1269 return array_try_spare(devname, dfdp, pol, target, bare,
1270 st, verbose);
1271 else
1272 return partition_try_spare(devname, dfdp, pol,
1273 st, verbose);
1274 }
1275 /* No metadata was specified or found so options are open.
1276 * Check for whether any array metadata, or any partition metadata
1277 * might allow adding the spare. This check is just help to avoid
1278 * a more costly scan of all arrays when we can be sure that will
1279 * fail.
1280 */
1281 for (i = 0; (!arrays_ok || !partitions_ok) && superlist[i] ; i++) {
1282 if (superlist[i]->add_to_super && !arrays_ok &&
1283 policy_action_allows(pol, superlist[i]->name, act_spare))
1284 arrays_ok = 1;
1285 if (superlist[i]->add_to_super == NULL && !partitions_ok &&
1286 policy_action_allows(pol, superlist[i]->name, act_spare))
1287 partitions_ok = 1;
1288 }
1289 rv = 1;
1290 if (arrays_ok)
1291 rv = array_try_spare(devname, dfdp, pol, target, bare,
1292 st, verbose);
1293 if (rv != 0 && partitions_ok)
1294 rv = partition_try_spare(devname, dfdp, pol, st, verbose);
1295 return rv;
1296 }
1297
1298 int IncrementalScan(int verbose)
1299 {
1300 /* look at every device listed in the 'map' file.
1301 * If one is found that is not running then:
1302 * look in mdadm.conf for bitmap file.
1303 * if one exists, but array has none, add it.
1304 * try to start array in auto-readonly mode
1305 */
1306 struct map_ent *mapl = NULL;
1307 struct map_ent *me;
1308 struct mddev_ident *devs, *mddev;
1309 int rv = 0;
1310
1311 map_read(&mapl);
1312 devs = conf_get_ident(NULL);
1313
1314 for (me = mapl ; me ; me = me->next) {
1315 mdu_array_info_t array;
1316 mdu_bitmap_file_t bmf;
1317 struct mdinfo *sra;
1318 int mdfd = open_dev(me->devnum);
1319
1320 if (mdfd < 0)
1321 continue;
1322 if (ioctl(mdfd, GET_ARRAY_INFO, &array) == 0 ||
1323 errno != ENODEV) {
1324 close(mdfd);
1325 continue;
1326 }
1327 /* Ok, we can try this one. Maybe it needs a bitmap */
1328 for (mddev = devs ; mddev ; mddev = mddev->next)
1329 if (mddev->devname && me->path
1330 && devname_matches(mddev->devname, me->path))
1331 break;
1332 if (mddev && mddev->bitmap_file) {
1333 /*
1334 * Note: early kernels will wrongly fail this, so it
1335 * is a hint only
1336 */
1337 int added = -1;
1338 if (ioctl(mdfd, GET_ARRAY_INFO, &bmf) < 0) {
1339 int bmfd = open(mddev->bitmap_file, O_RDWR);
1340 if (bmfd >= 0) {
1341 added = ioctl(mdfd, SET_BITMAP_FILE,
1342 bmfd);
1343 close(bmfd);
1344 }
1345 }
1346 if (verbose >= 0) {
1347 if (added == 0)
1348 fprintf(stderr, Name
1349 ": Added bitmap %s to %s\n",
1350 mddev->bitmap_file, me->path);
1351 else if (errno != EEXIST)
1352 fprintf(stderr, Name
1353 ": Failed to add bitmap to %s: %s\n",
1354 me->path, strerror(errno));
1355 }
1356 }
1357 sra = sysfs_read(mdfd, 0, 0);
1358 if (sra) {
1359 if (sysfs_set_str(sra, NULL,
1360 "array_state", "read-auto") == 0) {
1361 if (verbose >= 0)
1362 fprintf(stderr, Name
1363 ": started array %s\n",
1364 me->path ?: devnum2devname(me->devnum));
1365 } else {
1366 fprintf(stderr, Name
1367 ": failed to start array %s: %s\n",
1368 me->path ?: devnum2devname(me->devnum),
1369 strerror(errno));
1370 rv = 1;
1371 }
1372 }
1373 }
1374 return rv;
1375 }
1376
1377 static char *container2devname(char *devname)
1378 {
1379 char *mdname = NULL;
1380
1381 if (devname[0] == '/') {
1382 int fd = open(devname, O_RDONLY);
1383 if (fd >= 0) {
1384 mdname = devnum2devname(fd2devnum(fd));
1385 close(fd);
1386 }
1387 } else {
1388 int uuid[4];
1389 struct map_ent *mp, *map = NULL;
1390
1391 if (!parse_uuid(devname, uuid))
1392 return mdname;
1393 mp = map_by_uuid(&map, uuid);
1394 if (mp)
1395 mdname = devnum2devname(mp->devnum);
1396 map_free(map);
1397 }
1398
1399 return mdname;
1400 }
1401
1402 static int Incremental_container(struct supertype *st, char *devname,
1403 char *homehost, int verbose,
1404 int runstop, int autof)
1405 {
1406 /* Collect the contents of this container and for each
1407 * array, choose a device name and assemble the array.
1408 */
1409
1410 struct mdinfo *list;
1411 struct mdinfo *ra;
1412 struct map_ent *map = NULL;
1413 struct mdinfo info;
1414 int trustworthy;
1415 struct mddev_ident *match;
1416 int rv = 0;
1417
1418 memset(&info, 0, sizeof(info));
1419 st->ss->getinfo_super(st, &info, NULL);
1420
1421 if ((runstop > 0 && info.container_enough >= 0) ||
1422 info.container_enough > 0)
1423 /* pass */;
1424 else {
1425 if (verbose)
1426 fprintf(stderr, Name ": not enough devices to start the container\n");
1427 return 0;
1428 }
1429
1430 match = search_mdstat(st, &info, devname, verbose, &rv);
1431 if (match == NULL && rv == 2)
1432 return rv;
1433
1434 /* Need to compute 'trustworthy' */
1435 if (match)
1436 trustworthy = LOCAL;
1437 else if (st->ss->match_home(st, homehost) == 1)
1438 trustworthy = LOCAL;
1439 else if (st->ss->match_home(st, "any") == 1)
1440 trustworthy = LOCAL;
1441 else
1442 trustworthy = FOREIGN;
1443
1444 list = st->ss->container_content(st, NULL);
1445 if (map_lock(&map))
1446 fprintf(stderr, Name ": failed to get exclusive lock on "
1447 "mapfile\n");
1448 /* do not assemble arrays that might have bad blocks */
1449 if (list->array.state & (1<<MD_SB_BBM_ERRORS)) {
1450 fprintf(stderr, Name ": BBM log found in metadata. "
1451 "Cannot activate array(s).\n");
1452 list = NULL;
1453 }
1454
1455 for (ra = list ; ra ; ra = ra->next) {
1456 int mdfd;
1457 char chosen_name[1024];
1458 struct map_ent *mp;
1459 struct mddev_ident *match = NULL;
1460
1461 mp = map_by_uuid(&map, ra->uuid);
1462
1463 if (mp) {
1464 mdfd = open_dev(mp->devnum);
1465 if (mp->path)
1466 strcpy(chosen_name, mp->path);
1467 else
1468 strcpy(chosen_name, devnum2devname(mp->devnum));
1469 } else {
1470
1471 /* Check in mdadm.conf for container == devname and
1472 * member == ra->text_version after second slash.
1473 */
1474 char *sub = strchr(ra->text_version+1, '/');
1475 struct mddev_ident *array_list;
1476 if (sub) {
1477 sub++;
1478 array_list = conf_get_ident(NULL);
1479 } else
1480 array_list = NULL;
1481 for(; array_list ; array_list = array_list->next) {
1482 char *dn;
1483 if (array_list->member == NULL ||
1484 array_list->container == NULL)
1485 continue;
1486 if (strcmp(array_list->member, sub) != 0)
1487 continue;
1488 if (array_list->uuid_set &&
1489 !same_uuid(ra->uuid, array_list->uuid, st->ss->swapuuid))
1490 continue;
1491 dn = container2devname(array_list->container);
1492 if (dn == NULL)
1493 continue;
1494 if (strncmp(dn, ra->text_version+1,
1495 strlen(dn)) != 0 ||
1496 ra->text_version[strlen(dn)+1] != '/') {
1497 free(dn);
1498 continue;
1499 }
1500 free(dn);
1501 /* we have a match */
1502 match = array_list;
1503 if (verbose>0)
1504 fprintf(stderr, Name ": match found for member %s\n",
1505 array_list->member);
1506 break;
1507 }
1508
1509 if (match && match->devname &&
1510 strcasecmp(match->devname, "<ignore>") == 0) {
1511 if (verbose > 0)
1512 fprintf(stderr, Name ": array %s/%s is "
1513 "explicitly ignored by mdadm.conf\n",
1514 match->container, match->member);
1515 return 2;
1516 }
1517 if (match)
1518 trustworthy = LOCAL;
1519
1520 mdfd = create_mddev(match ? match->devname : NULL,
1521 ra->name,
1522 autof,
1523 trustworthy,
1524 chosen_name);
1525 }
1526
1527 if (mdfd < 0) {
1528 fprintf(stderr, Name ": failed to open %s: %s.\n",
1529 chosen_name, strerror(errno));
1530 return 2;
1531 }
1532
1533 assemble_container_content(st, mdfd, ra, runstop,
1534 chosen_name, verbose);
1535 }
1536 map_unlock(&map);
1537 return 0;
1538 }
1539
1540 /*
1541 * IncrementalRemove - Attempt to see if the passed in device belongs to any
1542 * raid arrays, and if so first fail (if needed) and then remove the device.
1543 *
1544 * @devname - The device we want to remove
1545 * @id_path - name as found in /dev/disk/by-path for this device
1546 *
1547 * Note: the device name must be a kernel name like "sda", so
1548 * that we can find it in /proc/mdstat
1549 */
1550 int IncrementalRemove(char *devname, char *id_path, int verbose)
1551 {
1552 int mdfd;
1553 int rv;
1554 struct mdstat_ent *ent;
1555 struct mddev_dev devlist;
1556
1557 if (!id_path)
1558 dprintf(Name ": incremental removal without --path <id_path> "
1559 "lacks the possibility to re-add new device in this "
1560 "port\n");
1561
1562 if (strchr(devname, '/')) {
1563 fprintf(stderr, Name ": incremental removal requires a "
1564 "kernel device name, not a file: %s\n", devname);
1565 return 1;
1566 }
1567 ent = mdstat_by_component(devname);
1568 if (!ent) {
1569 fprintf(stderr, Name ": %s does not appear to be a component "
1570 "of any array\n", devname);
1571 return 1;
1572 }
1573 mdfd = open_dev(ent->devnum);
1574 if (mdfd < 0) {
1575 fprintf(stderr, Name ": Cannot open array %s!!\n", ent->dev);
1576 free_mdstat(ent);
1577 return 1;
1578 }
1579
1580 if (id_path) {
1581 struct map_ent *map = NULL, *me;
1582 me = map_by_devnum(&map, ent->devnum);
1583 if (me)
1584 policy_save_path(id_path, me);
1585 map_free(map);
1586 }
1587
1588 memset(&devlist, 0, sizeof(devlist));
1589 devlist.devname = devname;
1590 devlist.disposition = 'f';
1591 /* for a container, we must fail each member array */
1592 if (ent->metadata_version &&
1593 strncmp(ent->metadata_version, "external:", 9) == 0) {
1594 struct mdstat_ent *mdstat = mdstat_read(0, 0);
1595 struct mdstat_ent *memb;
1596 for (memb = mdstat ; memb ; memb = memb->next)
1597 if (is_container_member(memb, ent->dev)) {
1598 int subfd = open_dev(memb->devnum);
1599 if (subfd >= 0) {
1600 Manage_subdevs(memb->dev, subfd,
1601 &devlist, verbose, 0,
1602 NULL);
1603 close(subfd);
1604 }
1605 }
1606 free_mdstat(mdstat);
1607 } else
1608 Manage_subdevs(ent->dev, mdfd, &devlist, verbose, 0, NULL);
1609 devlist.disposition = 'r';
1610 rv = Manage_subdevs(ent->dev, mdfd, &devlist, verbose, 0, NULL);
1611 close(mdfd);
1612 free_mdstat(ent);
1613 return rv;
1614 }
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