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Minor cosmetic fixes in various files.
[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) 2006-2012 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 struct context *c);
47
48 int Incremental(char *devname, struct context *c,
49 struct supertype *st)
50 {
51 /* Add this device to an array, creating the array if necessary
52 * and starting the array if sensible or - if runstop>0 - if possible.
53 *
54 * This has several steps:
55 *
56 * 1/ Check if device is permitted by mdadm.conf, reject if not.
57 * 2/ Find metadata, reject if none appropriate (check
58 * version/name from args)
59 * 3/ Check if there is a match in mdadm.conf
60 * 3a/ if not, check for homehost match. If no match, assemble as
61 * a 'foreign' array.
62 * 4/ Determine device number.
63 * - If in mdadm.conf with std name, use that
64 * - UUID in /var/run/mdadm.map use that
65 * - If name is suggestive, use that. unless in use with different uuid.
66 * - Choose a free, high number.
67 * - Use a partitioned device unless strong suggestion not to.
68 * e.g. auto=md
69 * Don't choose partitioned for containers.
70 * 5/ Find out if array already exists
71 * 5a/ if it does not
72 * - choose a name, from mdadm.conf or 'name' field in array.
73 * - create the array
74 * - add the device
75 * 5b/ if it does
76 * - check one drive in array to make sure metadata is a reasonably
77 * close match. Reject if not (e.g. different type)
78 * - add the device
79 * 6/ Make sure /var/run/mdadm.map contains this array.
80 * 7/ Is there enough devices to possibly start the array?
81 * For a container, this means running Incremental_container.
82 * 7a/ if not, finish with success.
83 * 7b/ if yes,
84 * - read all metadata and arrange devices like -A does
85 * - if number of OK devices match expected, or -R and there are enough,
86 * start the array (auto-readonly).
87 */
88 struct stat stb;
89 struct mdinfo info, dinfo;
90 struct mdinfo *sra = NULL, *d;
91 struct mddev_ident *match;
92 char chosen_name[1024];
93 int rv = 1;
94 struct map_ent *mp, *map = NULL;
95 int dfd = -1, mdfd = -1;
96 char *avail = NULL;
97 int active_disks;
98 int trustworthy;
99 char *name_to_use;
100 mdu_array_info_t ainf;
101 struct dev_policy *policy = NULL;
102 struct map_ent target_array;
103 int have_target;
104
105 struct createinfo *ci = conf_get_create_info();
106
107 if (stat(devname, &stb) < 0) {
108 if (c->verbose >= 0)
109 pr_err("stat failed for %s: %s.\n",
110 devname, strerror(errno));
111 return rv;
112 }
113 if ((stb.st_mode & S_IFMT) != S_IFBLK) {
114 if (c->verbose >= 0)
115 pr_err("%s is not a block device.\n",
116 devname);
117 return rv;
118 }
119 dfd = dev_open(devname, O_RDONLY|O_EXCL);
120 if (dfd < 0) {
121 if (c->verbose >= 0)
122 pr_err("cannot open %s: %s.\n",
123 devname, strerror(errno));
124 return rv;
125 }
126 /* If the device is a container, we do something very different */
127 if (must_be_container(dfd)) {
128 if (!st)
129 st = super_by_fd(dfd, NULL);
130 if (st && st->ss->load_container)
131 rv = st->ss->load_container(st, dfd, NULL);
132
133 close(dfd);
134 if (!rv && st->ss->container_content) {
135 if (map_lock(&map))
136 pr_err("failed to get "
137 "exclusive lock on mapfile\n");
138 rv = Incremental_container(st, devname, c);
139 map_unlock(&map);
140 return rv;
141 }
142
143 pr_err("%s is not part of an md array.\n",
144 devname);
145 return rv;
146 }
147
148 /* 1/ Check if device is permitted by mdadm.conf */
149
150 if (!conf_test_dev(devname)) {
151 if (c->verbose >= 0)
152 pr_err("%s not permitted by mdadm.conf.\n",
153 devname);
154 goto out;
155 }
156
157 /* 2/ Find metadata, reject if none appropriate (check
158 * version/name from args) */
159
160 if (fstat(dfd, &stb) < 0) {
161 if (c->verbose >= 0)
162 pr_err("fstat failed for %s: %s.\n",
163 devname, strerror(errno));
164 goto out;
165 }
166 if ((stb.st_mode & S_IFMT) != S_IFBLK) {
167 if (c->verbose >= 0)
168 pr_err("%s is not a block device.\n",
169 devname);
170 goto out;
171 }
172
173 dinfo.disk.major = major(stb.st_rdev);
174 dinfo.disk.minor = minor(stb.st_rdev);
175
176 policy = disk_policy(&dinfo);
177 have_target = policy_check_path(&dinfo, &target_array);
178
179 if (st == NULL && (st = guess_super(dfd)) == NULL) {
180 if (c->verbose >= 0)
181 pr_err("no recognisable superblock on %s.\n",
182 devname);
183 rv = try_spare(devname, &dfd, policy,
184 have_target ? &target_array : NULL,
185 st, c->verbose);
186 goto out;
187 }
188 if (st->ss->compare_super == NULL ||
189 st->ss->load_super(st, dfd, NULL)) {
190 if (c->verbose >= 0)
191 pr_err("no RAID superblock on %s.\n",
192 devname);
193 rv = try_spare(devname, &dfd, policy,
194 have_target ? &target_array : NULL,
195 st, c->verbose);
196 free(st);
197 goto out;
198 }
199 close (dfd); dfd = -1;
200
201 st->ss->getinfo_super(st, &info, NULL);
202
203 /* 3/ Check if there is a match in mdadm.conf */
204 match = conf_match(st, &info, devname, c->verbose, &rv);
205 if (!match && rv == 2)
206 goto out;
207
208 if (match && match->devname
209 && strcasecmp(match->devname, "<ignore>") == 0) {
210 if (c->verbose >= 0)
211 pr_err("array containing %s is explicitly"
212 " ignored by mdadm.conf\n",
213 devname);
214 goto out;
215 }
216
217 /* 3a/ if not, check for homehost match. If no match, continue
218 * but don't trust the 'name' in the array. Thus a 'random' minor
219 * number will be assigned, and the device name will be based
220 * on that. */
221 if (match)
222 trustworthy = LOCAL;
223 else if (st->ss->match_home(st, c->homehost) == 1)
224 trustworthy = LOCAL;
225 else if (st->ss->match_home(st, "any") == 1)
226 trustworthy = LOCAL_ANY;
227 else
228 trustworthy = FOREIGN;
229
230 if (!match && !conf_test_metadata(st->ss->name, policy,
231 (trustworthy == LOCAL))) {
232 if (c->verbose >= 1)
233 pr_err("%s has metadata type %s for which "
234 "auto-assembly is disabled\n",
235 devname, st->ss->name);
236 goto out;
237 }
238 if (trustworthy == LOCAL_ANY)
239 trustworthy = LOCAL;
240
241 /* There are three possible sources for 'autof': command line,
242 * ARRAY line in mdadm.conf, or CREATE line in mdadm.conf.
243 * ARRAY takes precedence, then command line, then
244 * CREATE.
245 */
246 if (match && match->autof)
247 c->autof = match->autof;
248 if (c->autof == 0)
249 c->autof = ci->autof;
250
251 name_to_use = info.name;
252 if (name_to_use[0] == 0 &&
253 info.array.level == LEVEL_CONTAINER) {
254 name_to_use = info.text_version;
255 trustworthy = METADATA;
256 }
257 if (name_to_use[0] && trustworthy != LOCAL &&
258 ! c->require_homehost &&
259 conf_name_is_free(name_to_use))
260 trustworthy = LOCAL;
261
262 /* strip "hostname:" prefix from name if we have decided
263 * to treat it as LOCAL
264 */
265 if (trustworthy == LOCAL && strchr(name_to_use, ':') != NULL)
266 name_to_use = strchr(name_to_use, ':')+1;
267
268 /* 4/ Check if array exists.
269 */
270 if (map_lock(&map))
271 pr_err("failed to get exclusive lock on "
272 "mapfile\n");
273 mp = map_by_uuid(&map, info.uuid);
274 if (mp)
275 mdfd = open_dev(mp->devnum);
276 else
277 mdfd = -1;
278
279 if (mdfd < 0) {
280
281 /* Couldn't find an existing array, maybe make a new one */
282 mdfd = create_mddev(match ? match->devname : NULL,
283 name_to_use, c->autof, trustworthy, chosen_name);
284
285 if (mdfd < 0)
286 goto out_unlock;
287
288 sysfs_init(&info, mdfd, 0);
289
290 if (set_array_info(mdfd, st, &info) != 0) {
291 pr_err("failed to set array info for %s: %s\n",
292 chosen_name, strerror(errno));
293 rv = 2;
294 goto out_unlock;
295 }
296
297 dinfo = info;
298 dinfo.disk.major = major(stb.st_rdev);
299 dinfo.disk.minor = minor(stb.st_rdev);
300 if (add_disk(mdfd, st, &info, &dinfo) != 0) {
301 pr_err("failed to add %s to %s: %s.\n",
302 devname, chosen_name, strerror(errno));
303 ioctl(mdfd, STOP_ARRAY, 0);
304 rv = 2;
305 goto out_unlock;
306 }
307 sra = sysfs_read(mdfd, -1, (GET_DEVS | GET_STATE |
308 GET_OFFSET | GET_SIZE));
309
310 if (!sra || !sra->devs || sra->devs->disk.raid_disk >= 0) {
311 /* It really should be 'none' - must be old buggy
312 * kernel, and mdadm -I may not be able to complete.
313 * So reject it.
314 */
315 ioctl(mdfd, STOP_ARRAY, NULL);
316 pr_err("You have an old buggy kernel which cannot support\n"
317 " --incremental reliably. Aborting.\n");
318 rv = 2;
319 goto out_unlock;
320 }
321 info.array.working_disks = 1;
322 /* 6/ Make sure /var/run/mdadm.map contains this array. */
323 map_update(&map, fd2devnum(mdfd),
324 info.text_version,
325 info.uuid, chosen_name);
326 } else {
327 /* 5b/ if it does */
328 /* - check one drive in array to make sure metadata is a reasonably */
329 /* close match. Reject if not (e.g. different type) */
330 /* - add the device */
331 char dn[20];
332 int dfd2;
333 int err;
334 struct supertype *st2;
335 struct mdinfo info2, *d;
336
337 sra = sysfs_read(mdfd, -1, (GET_DEVS | GET_STATE |
338 GET_OFFSET | GET_SIZE));
339
340 if (mp->path)
341 strcpy(chosen_name, mp->path);
342 else
343 strcpy(chosen_name, devnum2devname(mp->devnum));
344
345 /* It is generally not OK to add non-spare drives to a
346 * running array as they are probably missing because
347 * they failed. However if runstop is 1, then the
348 * array was possibly started early and our best bet is
349 * to add this anyway.
350 * Also if action policy is re-add or better we allow
351 * re-add.
352 * This doesn't apply to containers as the 'non-spare'
353 * flag has a different meaning. The test has to happen
354 * at the device level there
355 */
356 if (!st->ss->external
357 && (info.disk.state & (1<<MD_DISK_SYNC)) != 0
358 && ! policy_action_allows(policy, st->ss->name,
359 act_re_add)
360 && c->runstop < 1) {
361 if (ioctl(mdfd, GET_ARRAY_INFO, &ainf) == 0) {
362 pr_err("not adding %s to active array (without --run) %s\n",
363 devname, chosen_name);
364 rv = 2;
365 goto out_unlock;
366 }
367 }
368 if (!sra) {
369 rv = 2;
370 goto out_unlock;
371 }
372 if (sra->devs) {
373 sprintf(dn, "%d:%d", sra->devs->disk.major,
374 sra->devs->disk.minor);
375 dfd2 = dev_open(dn, O_RDONLY);
376 if (dfd2 < 0) {
377 pr_err("unable to open %s\n", devname);
378 rv = 2;
379 goto out_unlock;
380 }
381 st2 = dup_super(st);
382 if (st2->ss->load_super(st2, dfd2, NULL) ||
383 st->ss->compare_super(st, st2) != 0) {
384 pr_err("metadata mismatch between %s and "
385 "chosen array %s\n",
386 devname, chosen_name);
387 close(dfd2);
388 rv = 2;
389 goto out_unlock;
390 }
391 close(dfd2);
392 st2->ss->getinfo_super(st2, &info2, NULL);
393 st2->ss->free_super(st2);
394 if (info.array.level != info2.array.level ||
395 memcmp(info.uuid, info2.uuid, 16) != 0 ||
396 info.array.raid_disks != info2.array.raid_disks) {
397 pr_err("unexpected difference between %s and %s.\n",
398 chosen_name, devname);
399 rv = 2;
400 goto out_unlock;
401 }
402 }
403 info.disk.major = major(stb.st_rdev);
404 info.disk.minor = minor(stb.st_rdev);
405 /* add disk needs to know about containers */
406 if (st->ss->external)
407 sra->array.level = LEVEL_CONTAINER;
408 err = add_disk(mdfd, st, sra, &info);
409 if (err < 0 && errno == EBUSY) {
410 /* could be another device present with the same
411 * disk.number. Find and reject any such
412 */
413 find_reject(mdfd, st, sra, info.disk.number,
414 info.events, c->verbose, chosen_name);
415 err = add_disk(mdfd, st, sra, &info);
416 }
417 if (err < 0) {
418 pr_err("failed to add %s to %s: %s.\n",
419 devname, chosen_name, strerror(errno));
420 rv = 2;
421 goto out_unlock;
422 }
423 info.array.working_disks = 0;
424 for (d = sra->devs; d; d=d->next)
425 info.array.working_disks ++;
426
427 }
428
429 /* 7/ Is there enough devices to possibly start the array? */
430 /* 7a/ if not, finish with success. */
431 if (info.array.level == LEVEL_CONTAINER) {
432 int devnum = devnum; /* defined and used iff ->external */
433 /* Try to assemble within the container */
434 sysfs_uevent(sra, "change");
435 if (c->verbose >= 0)
436 pr_err("container %s now has %d device%s\n",
437 chosen_name, info.array.working_disks,
438 info.array.working_disks == 1?"":"s");
439 wait_for(chosen_name, mdfd);
440 if (st->ss->external)
441 devnum = fd2devnum(mdfd);
442 if (st->ss->load_container)
443 rv = st->ss->load_container(st, mdfd, NULL);
444 close(mdfd);
445 sysfs_free(sra);
446 if (!rv)
447 rv = Incremental_container(st, chosen_name, c);
448 map_unlock(&map);
449 if (rv == 1)
450 /* Don't fail the whole -I if a subarray didn't
451 * have enough devices to start yet
452 */
453 rv = 0;
454 /* after spare is added, ping monitor for external metadata
455 * so that it can eg. try to rebuild degraded array */
456 if (st->ss->external)
457 ping_monitor_by_id(devnum);
458 return rv;
459 }
460
461 /* We have added something to the array, so need to re-read the
462 * state. Eventually this state should be kept up-to-date as
463 * things change.
464 */
465 sysfs_free(sra);
466 sra = sysfs_read(mdfd, -1, (GET_DEVS | GET_STATE |
467 GET_OFFSET | GET_SIZE));
468 active_disks = count_active(st, sra, mdfd, &avail, &info);
469 if (enough(info.array.level, info.array.raid_disks,
470 info.array.layout, info.array.state & 1,
471 avail) == 0) {
472 if (c->verbose >= 0)
473 pr_err("%s attached to %s, not enough to start (%d).\n",
474 devname, chosen_name, active_disks);
475 rv = 0;
476 goto out_unlock;
477 }
478
479 /* 7b/ if yes, */
480 /* - if number of OK devices match expected, or -R and there */
481 /* are enough, */
482 /* + add any bitmap file */
483 /* + start the array (auto-readonly). */
484
485 if (ioctl(mdfd, GET_ARRAY_INFO, &ainf) == 0) {
486 if (c->verbose >= 0)
487 pr_err("%s attached to %s which is already active.\n",
488 devname, chosen_name);
489 rv = 0;
490 goto out_unlock;
491 }
492
493 map_unlock(&map);
494 if (c->runstop > 0 || active_disks >= info.array.working_disks) {
495 struct mdinfo *dsk;
496 /* Let's try to start it */
497 if (match && match->bitmap_file) {
498 int bmfd = open(match->bitmap_file, O_RDWR);
499 if (bmfd < 0) {
500 pr_err("Could not open bitmap file %s.\n",
501 match->bitmap_file);
502 goto out;
503 }
504 if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) {
505 close(bmfd);
506 pr_err("Failed to set bitmapfile for %s.\n",
507 chosen_name);
508 goto out;
509 }
510 close(bmfd);
511 }
512 /* Need to remove from the array any devices which
513 * 'count_active' discerned were too old or inappropriate
514 */
515 for (d = sra ? sra->devs : NULL ; d ; d = d->next)
516 if (d->disk.state & (1<<MD_DISK_REMOVED))
517 remove_disk(mdfd, st, sra, d);
518
519 if ((sra == NULL || active_disks >= info.array.working_disks)
520 && trustworthy != FOREIGN)
521 rv = ioctl(mdfd, RUN_ARRAY, NULL);
522 else
523 rv = sysfs_set_str(sra, NULL,
524 "array_state", "read-auto");
525 if (rv == 0) {
526 if (c->verbose >= 0)
527 pr_err("%s attached to %s, which has been started.\n",
528 devname, chosen_name);
529 rv = 0;
530 wait_for(chosen_name, mdfd);
531 /* We just started the array, so some devices
532 * might have been evicted from the array
533 * because their event counts were too old.
534 * If the action=re-add policy is in-force for
535 * those devices we should re-add them now.
536 */
537 for (dsk = sra->devs; dsk ; dsk = dsk->next) {
538 if (disk_action_allows(dsk, st->ss->name, act_re_add) &&
539 add_disk(mdfd, st, sra, dsk) == 0)
540 pr_err("%s re-added to %s\n",
541 dsk->sys_name, chosen_name);
542 }
543 } else {
544 pr_err("%s attached to %s, but failed to start: %s.\n",
545 devname, chosen_name, strerror(errno));
546 rv = 1;
547 }
548 } else {
549 if (c->verbose >= 0)
550 pr_err("%s attached to %s, not enough to start safely.\n",
551 devname, chosen_name);
552 rv = 0;
553 }
554 out:
555 free(avail);
556 if (dfd >= 0)
557 close(dfd);
558 if (mdfd >= 0)
559 close(mdfd);
560 if (policy)
561 dev_policy_free(policy);
562 if (sra)
563 sysfs_free(sra);
564 return rv;
565 out_unlock:
566 map_unlock(&map);
567 goto out;
568 }
569
570 static void find_reject(int mdfd, struct supertype *st, struct mdinfo *sra,
571 int number, __u64 events, int verbose,
572 char *array_name)
573 {
574 /* Find a device attached to this array with a disk.number of number
575 * and events less than the passed events, and remove the device.
576 */
577 struct mdinfo *d;
578 mdu_array_info_t ra;
579
580 if (ioctl(mdfd, GET_ARRAY_INFO, &ra) == 0)
581 return; /* not safe to remove from active arrays
582 * without thinking more */
583
584 for (d = sra->devs; d ; d = d->next) {
585 char dn[10];
586 int dfd;
587 struct mdinfo info;
588 sprintf(dn, "%d:%d", d->disk.major, d->disk.minor);
589 dfd = dev_open(dn, O_RDONLY);
590 if (dfd < 0)
591 continue;
592 if (st->ss->load_super(st, dfd, NULL)) {
593 close(dfd);
594 continue;
595 }
596 st->ss->getinfo_super(st, &info, NULL);
597 st->ss->free_super(st);
598 close(dfd);
599
600 if (info.disk.number != number ||
601 info.events >= events)
602 continue;
603
604 if (d->disk.raid_disk > -1)
605 sysfs_set_str(sra, d, "slot", "none");
606 if (sysfs_set_str(sra, d, "state", "remove") == 0)
607 if (verbose >= 0)
608 pr_err("removing old device %s from %s\n",
609 d->sys_name+4, array_name);
610 }
611 }
612
613 static int count_active(struct supertype *st, struct mdinfo *sra,
614 int mdfd, char **availp,
615 struct mdinfo *bestinfo)
616 {
617 /* count how many devices in sra think they are active */
618 struct mdinfo *d;
619 int cnt = 0;
620 __u64 max_events = 0;
621 char *avail = NULL;
622 int *best = NULL;
623 char *devmap = NULL;
624 int numdevs = 0;
625 int devnum;
626 int b, i;
627 int raid_disks = 0;
628
629 if (!sra)
630 return 0;
631
632 for (d = sra->devs ; d ; d = d->next)
633 numdevs++;
634 for (d = sra->devs, devnum = 0 ; d ; d = d->next, devnum++) {
635 char dn[30];
636 int dfd;
637 int ok;
638 struct mdinfo info;
639
640 sprintf(dn, "%d:%d", d->disk.major, d->disk.minor);
641 dfd = dev_open(dn, O_RDONLY);
642 if (dfd < 0)
643 continue;
644 ok = st->ss->load_super(st, dfd, NULL);
645 close(dfd);
646 if (ok != 0)
647 continue;
648 info.array.raid_disks = raid_disks;
649 st->ss->getinfo_super(st, &info, devmap + raid_disks * devnum);
650 if (!avail) {
651 raid_disks = info.array.raid_disks;
652 avail = xcalloc(raid_disks, 1);
653 *availp = avail;
654
655 best = xcalloc(raid_disks, sizeof(int));
656 devmap = xcalloc(raid_disks, numdevs);
657
658 st->ss->getinfo_super(st, &info, devmap);
659 }
660
661 if (info.disk.state & (1<<MD_DISK_SYNC))
662 {
663 if (cnt == 0) {
664 cnt++;
665 max_events = info.events;
666 avail[info.disk.raid_disk] = 2;
667 best[info.disk.raid_disk] = devnum;
668 st->ss->getinfo_super(st, bestinfo, NULL);
669 } else if (info.events == max_events) {
670 avail[info.disk.raid_disk] = 2;
671 best[info.disk.raid_disk] = devnum;
672 } else if (info.events == max_events-1) {
673 if (avail[info.disk.raid_disk] == 0) {
674 avail[info.disk.raid_disk] = 1;
675 best[info.disk.raid_disk] = devnum;
676 }
677 } else if (info.events < max_events - 1)
678 ;
679 else if (info.events == max_events+1) {
680 int i;
681 max_events = info.events;
682 for (i = 0; i < raid_disks; i++)
683 if (avail[i])
684 avail[i]--;
685 avail[info.disk.raid_disk] = 2;
686 best[info.disk.raid_disk] = devnum;
687 st->ss->getinfo_super(st, bestinfo, NULL);
688 } else { /* info.events much bigger */
689 memset(avail, 0, raid_disks);
690 max_events = info.events;
691 avail[info.disk.raid_disk] = 2;
692 best[info.disk.raid_disk] = devnum;
693 st->ss->getinfo_super(st, bestinfo, NULL);
694 }
695 }
696 st->ss->free_super(st);
697 }
698 if (!avail)
699 return 0;
700 /* We need to reject any device that thinks the best device is
701 * failed or missing */
702 for (b = 0; b < raid_disks; b++)
703 if (avail[b] == 2)
704 break;
705 cnt = 0;
706 for (i = 0 ; i < raid_disks ; i++) {
707 if (i != b && avail[i])
708 if (devmap[raid_disks * best[i] + b] == 0) {
709 /* This device thinks 'b' is failed -
710 * don't use it */
711 devnum = best[i];
712 for (d=sra->devs ; devnum; d = d->next)
713 devnum--;
714 d->disk.state |= (1 << MD_DISK_REMOVED);
715 avail[i] = 0;
716 }
717 if (avail[i])
718 cnt++;
719 }
720 free(best);
721 free(devmap);
722 return cnt;
723 }
724
725 /* test if container has degraded member(s) */
726 static int container_members_max_degradation(struct map_ent *map, struct map_ent *me)
727 {
728 mdu_array_info_t array;
729 int afd;
730 int max_degraded = 0;
731
732 for(; map; map = map->next) {
733 if (!is_subarray(map->metadata) ||
734 devname2devnum(map->metadata+1) != me->devnum)
735 continue;
736 afd = open_dev(map->devnum);
737 if (afd < 0)
738 continue;
739 /* most accurate information regarding array degradation */
740 if (ioctl(afd, GET_ARRAY_INFO, &array) >= 0) {
741 int degraded = array.raid_disks - array.active_disks -
742 array.spare_disks;
743 if (degraded > max_degraded)
744 max_degraded = degraded;
745 }
746 close(afd);
747 }
748 return (max_degraded);
749 }
750
751 static int array_try_spare(char *devname, int *dfdp, struct dev_policy *pol,
752 struct map_ent *target, int bare,
753 struct supertype *st, int verbose)
754 {
755 /* This device doesn't have any md metadata
756 * The device policy allows 'spare' and if !bare, it allows spare-same-slot.
757 * If 'st' is not set, then we only know that some metadata allows this,
758 * others possibly don't.
759 * So look for a container or array to attach the device to.
760 * Prefer 'target' if that is set and the array is found.
761 *
762 * If st is set, then only arrays of that type are considered
763 * Return 0 on success, or some exit code on failure, probably 1.
764 */
765 int rv = 1;
766 struct stat stb;
767 struct map_ent *mp, *map = NULL;
768 struct mdinfo *chosen = NULL;
769 int dfd = *dfdp;
770
771 if (fstat(dfd, &stb) != 0)
772 return 1;
773
774 /*
775 * Now we need to find a suitable array to add this to.
776 * We only accept arrays that:
777 * - match 'st'
778 * - are in the same domains as the device
779 * - are of an size for which the device will be useful
780 * and we choose the one that is the most degraded
781 */
782
783 if (map_lock(&map)) {
784 pr_err("failed to get exclusive lock on "
785 "mapfile\n");
786 return 1;
787 }
788 for (mp = map ; mp ; mp = mp->next) {
789 struct supertype *st2;
790 struct domainlist *dl = NULL;
791 struct mdinfo *sra;
792 unsigned long long devsize;
793 unsigned long long component_size = 0;
794
795 if (is_subarray(mp->metadata))
796 continue;
797 if (st) {
798 st2 = st->ss->match_metadata_desc(mp->metadata);
799 if (!st2 ||
800 (st->minor_version >= 0 &&
801 st->minor_version != st2->minor_version)) {
802 if (verbose > 1)
803 pr_err("not adding %s to %s as metadata type doesn't match\n",
804 devname, mp->path);
805 free(st2);
806 continue;
807 }
808 free(st2);
809 }
810 sra = sysfs_read(-1, mp->devnum,
811 GET_DEVS|GET_OFFSET|GET_SIZE|GET_STATE|
812 GET_DEGRADED|GET_COMPONENT|GET_VERSION);
813 if (!sra) {
814 /* Probably a container - no degraded info */
815 sra = sysfs_read(-1, mp->devnum,
816 GET_DEVS|GET_OFFSET|GET_SIZE|GET_STATE|
817 GET_COMPONENT|GET_VERSION);
818 if (sra)
819 sra->array.failed_disks = -1;
820 }
821 if (!sra)
822 continue;
823 if (st == NULL) {
824 int i;
825 st2 = NULL;
826 for(i = 0; !st2 && superlist[i]; i++)
827 st2 = superlist[i]->match_metadata_desc(
828 sra->text_version);
829 if (!st2) {
830 if (verbose > 1)
831 pr_err("not adding %s to %s"
832 " as metadata not recognised.\n",
833 devname, mp->path);
834 goto next;
835 }
836 /* Need to double check the 'act_spare' permissions applies
837 * to this metadata.
838 */
839 if (!policy_action_allows(pol, st2->ss->name, act_spare))
840 goto next;
841 if (!bare && !policy_action_allows(pol, st2->ss->name,
842 act_spare_same_slot))
843 goto next;
844 } else
845 st2 = st;
846 /* update number of failed disks for mostly degraded
847 * container member */
848 if (sra->array.failed_disks == -1)
849 sra->array.failed_disks = container_members_max_degradation(map, mp);
850
851 get_dev_size(dfd, NULL, &devsize);
852 if (sra->component_size == 0) {
853 /* true for containers, here we must read superblock
854 * to obtain minimum spare size */
855 struct supertype *st3 = dup_super(st2);
856 int mdfd = open_dev(mp->devnum);
857 if (mdfd < 0) {
858 free(st3);
859 goto next;
860 }
861 if (st3->ss->load_container &&
862 !st3->ss->load_container(st3, mdfd, mp->path)) {
863 component_size = st3->ss->min_acceptable_spare_size(st3);
864 st3->ss->free_super(st3);
865 }
866 free(st3);
867 close(mdfd);
868 }
869 if ((sra->component_size > 0 &&
870 st2->ss->avail_size(st2, devsize) < sra->component_size)
871 ||
872 (sra->component_size == 0 && devsize < component_size)) {
873 if (verbose > 1)
874 pr_err("not adding %s to %s as it is too small\n",
875 devname, mp->path);
876 goto next;
877 }
878 /* test against target.
879 * If 'target' is set and 'bare' is false, we only accept
880 * arrays/containers that match 'target'.
881 * If 'target' is set and 'bare' is true, we prefer the
882 * array which matches 'target'.
883 * target is considered only if we deal with degraded array
884 */
885 if (target && policy_action_allows(pol, st2->ss->name,
886 act_spare_same_slot)) {
887 if (strcmp(target->metadata, mp->metadata) == 0 &&
888 memcmp(target->uuid, mp->uuid,
889 sizeof(target->uuid)) == 0 &&
890 sra->array.failed_disks > 0) {
891 /* This is our target!! */
892 if (chosen)
893 sysfs_free(chosen);
894 chosen = sra;
895 sra = NULL;
896 /* skip to end so we don't check any more */
897 while (mp->next)
898 mp = mp->next;
899 goto next;
900 }
901 /* not our target */
902 if (!bare)
903 goto next;
904 }
905
906 dl = domain_from_array(sra, st2->ss->name);
907 if (domain_test(dl, pol, st2->ss->name) != 1) {
908 /* domain test fails */
909 if (verbose > 1)
910 pr_err("not adding %s to %s as"
911 " it is not in a compatible domain\n",
912 devname, mp->path);
913
914 goto next;
915 }
916 /* all tests passed, OK to add to this array */
917 if (!chosen) {
918 chosen = sra;
919 sra = NULL;
920 } else if (chosen->array.failed_disks < sra->array.failed_disks) {
921 sysfs_free(chosen);
922 chosen = sra;
923 sra = NULL;
924 }
925 next:
926 if (sra)
927 sysfs_free(sra);
928 if (st != st2)
929 free(st2);
930 if (dl)
931 domain_free(dl);
932 }
933 if (chosen) {
934 /* add current device to chosen array as a spare */
935 int mdfd = open_dev(devname2devnum(chosen->sys_name));
936 if (mdfd >= 0) {
937 struct mddev_dev devlist;
938 char devname[20];
939 devlist.next = NULL;
940 devlist.used = 0;
941 devlist.writemostly = 0;
942 devlist.devname = devname;
943 sprintf(devname, "%d:%d", major(stb.st_rdev),
944 minor(stb.st_rdev));
945 devlist.disposition = 'a';
946 close(dfd);
947 *dfdp = -1;
948 rv = Manage_subdevs(chosen->sys_name, mdfd, &devlist,
949 -1, 0, NULL, 0);
950 close(mdfd);
951 }
952 if (verbose > 0) {
953 if (rv == 0)
954 pr_err("added %s as spare for %s\n",
955 devname, chosen->sys_name);
956 else
957 pr_err("failed to add %s as spare for %s\n",
958 devname, chosen->sys_name);
959 }
960 sysfs_free(chosen);
961 }
962 map_unlock(&map);
963 return rv;
964 }
965
966 static int partition_try_spare(char *devname, int *dfdp, struct dev_policy *pol,
967 struct supertype *st, int verbose)
968 {
969 /* we know that at least one partition virtual-metadata is
970 * allowed to incorporate spares like this device. We need to
971 * find a suitable device to copy partition information from.
972 *
973 * Getting a list of all disk (not partition) devices is
974 * slightly non-trivial. We could look at /sys/block, but
975 * that is theoretically due to be removed. Maybe best to use
976 * /dev/disk/by-path/?* and ignore names ending '-partNN' as
977 * we depend on this directory of 'path' info. But that fails
978 * to find loop devices and probably others. Maybe don't
979 * worry about that, they aren't the real target.
980 *
981 * So: check things in /dev/disk/by-path to see if they are in
982 * a compatible domain, then load the partition table and see
983 * if it is OK for the new device, and choose the largest
984 * partition table that fits.
985 */
986 DIR *dir;
987 struct dirent *de;
988 char *chosen = NULL;
989 unsigned long long chosen_size = 0;
990 struct supertype *chosen_st = NULL;
991 int fd;
992
993 dir = opendir("/dev/disk/by-path");
994 if (!dir)
995 return 1;
996 while ((de = readdir(dir)) != NULL) {
997 char *ep;
998 struct dev_policy *pol2 = NULL;
999 struct domainlist *domlist = NULL;
1000 int fd = -1;
1001 struct mdinfo info;
1002 struct supertype *st2 = NULL;
1003 char *devname = NULL;
1004 unsigned long long devsectors;
1005
1006 if (de->d_ino == 0 ||
1007 de->d_name[0] == '.' ||
1008 (de->d_type != DT_LNK && de->d_type != DT_UNKNOWN))
1009 goto next;
1010
1011 ep = de->d_name + strlen(de->d_name);
1012 while (ep > de->d_name &&
1013 isdigit(ep[-1]))
1014 ep--;
1015 if (ep > de->d_name + 5 &&
1016 strncmp(ep-5, "-part", 5) == 0)
1017 /* This is a partition - skip it */
1018 goto next;
1019
1020 pol2 = path_policy(de->d_name, type_disk);
1021
1022 domain_merge(&domlist, pol2, st ? st->ss->name : NULL);
1023 if (domain_test(domlist, pol, st ? st->ss->name : NULL) != 1)
1024 /* new device is incompatible with this device. */
1025 goto next;
1026
1027 domain_free(domlist);
1028 domlist = NULL;
1029
1030 if (asprintf(&devname, "/dev/disk/by-path/%s", de->d_name) != 1) {
1031 devname = NULL;
1032 goto next;
1033 }
1034 fd = open(devname, O_RDONLY);
1035 if (fd < 0)
1036 goto next;
1037 if (get_dev_size(fd, devname, &devsectors) == 0)
1038 goto next;
1039 devsectors >>= 9;
1040
1041 if (st)
1042 st2 = dup_super(st);
1043 else
1044 st2 = guess_super_type(fd, guess_partitions);
1045 if (st2 == NULL ||
1046 st2->ss->load_super(st2, fd, NULL) < 0)
1047 goto next;
1048
1049 if (!st) {
1050 /* Check domain policy again, this time referring to metadata */
1051 domain_merge(&domlist, pol2, st2->ss->name);
1052 if (domain_test(domlist, pol, st2->ss->name) != 1)
1053 /* Incompatible devices for this metadata type */
1054 goto next;
1055 if (!policy_action_allows(pol, st2->ss->name, act_spare))
1056 /* Some partition types allow sparing, but not
1057 * this one.
1058 */
1059 goto next;
1060 }
1061
1062 st2->ss->getinfo_super(st2, &info, NULL);
1063 if (info.component_size > devsectors)
1064 /* This partitioning doesn't fit in the device */
1065 goto next;
1066
1067 /* This is an acceptable device to copy partition
1068 * metadata from. We could just stop here, but I
1069 * think I want to keep looking incase a larger
1070 * metadata which makes better use of the device can
1071 * be found.
1072 */
1073 if (chosen == NULL ||
1074 chosen_size < info.component_size) {
1075 chosen_size = info.component_size;
1076 free(chosen);
1077 chosen = devname;
1078 devname = NULL;
1079 if (chosen_st) {
1080 chosen_st->ss->free_super(chosen_st);
1081 free(chosen_st);
1082 }
1083 chosen_st = st2;
1084 st2 = NULL;
1085 }
1086
1087 next:
1088 free(devname);
1089 domain_free(domlist);
1090 dev_policy_free(pol2);
1091 if (st2)
1092 st2->ss->free_super(st2);
1093 free(st2);
1094
1095 if (fd >= 0)
1096 close(fd);
1097 }
1098
1099 closedir(dir);
1100
1101 if (!chosen)
1102 return 1;
1103
1104 /* 'chosen' is the best device we can find. Let's write its
1105 * metadata to devname dfd is read-only so don't use that
1106 */
1107 fd = open(devname, O_RDWR);
1108 if (fd >= 0) {
1109 chosen_st->ss->store_super(chosen_st, fd);
1110 close(fd);
1111 }
1112 free(chosen);
1113 chosen_st->ss->free_super(chosen_st);
1114 free(chosen_st);
1115 return 0;
1116 }
1117
1118 static int is_bare(int dfd)
1119 {
1120 unsigned long long size = 0;
1121 char bufpad[4096 + 4096];
1122 char *buf = (char*)(((long)bufpad + 4096) & ~4095);
1123
1124 if (lseek(dfd, 0, SEEK_SET) != 0 ||
1125 read(dfd, buf, 4096) != 4096)
1126 return 0;
1127
1128 if (buf[0] != '\0' && buf[0] != '\x5a' && buf[0] != '\xff')
1129 return 0;
1130 if (memcmp(buf, buf+1, 4095) != 0)
1131 return 0;
1132
1133 /* OK, first 4K appear blank, try the end. */
1134 get_dev_size(dfd, NULL, &size);
1135 if (lseek(dfd, size-4096, SEEK_SET) < 0 ||
1136 read(dfd, buf, 4096) != 4096)
1137 return 0;
1138
1139 if (buf[0] != '\0' && buf[0] != '\x5a' && buf[0] != '\xff')
1140 return 0;
1141 if (memcmp(buf, buf+1, 4095) != 0)
1142 return 0;
1143
1144 return 1;
1145 }
1146
1147 /* adding a spare to a regular array is quite different from adding one to
1148 * a set-of-partitions virtual array.
1149 * This function determines which is worth trying and tries as appropriate.
1150 * Arrays are given priority over partitions.
1151 */
1152 static int try_spare(char *devname, int *dfdp, struct dev_policy *pol,
1153 struct map_ent *target,
1154 struct supertype *st, int verbose)
1155 {
1156 int i;
1157 int rv;
1158 int arrays_ok = 0;
1159 int partitions_ok = 0;
1160 int dfd = *dfdp;
1161 int bare;
1162
1163 /* Can only add a spare if device has at least one domain */
1164 if (pol_find(pol, pol_domain) == NULL)
1165 return 1;
1166 /* And only if some action allows spares */
1167 if (!policy_action_allows(pol, st?st->ss->name:NULL, act_spare))
1168 return 1;
1169
1170 /* Now check if the device is bare.
1171 * bare devices can always be added as a spare
1172 * non-bare devices can only be added if spare-same-slot is permitted,
1173 * and this device is replacing a previous device - in which case 'target'
1174 * will be set.
1175 */
1176 if (!is_bare(dfd)) {
1177 /* Must have a target and allow same_slot */
1178 /* Later - may allow force_spare without target */
1179 if (!target ||
1180 !policy_action_allows(pol, st?st->ss->name:NULL,
1181 act_spare_same_slot)) {
1182 if (verbose > 1)
1183 pr_err("%s is not bare, so not "
1184 "considering as a spare\n",
1185 devname);
1186 return 1;
1187 }
1188 bare = 0;
1189 } else
1190 bare = 1;
1191
1192 /* It might be OK to add this device to an array - need to see
1193 * what arrays might be candidates.
1194 */
1195 if (st) {
1196 /* just try try 'array' or 'partition' based on this metadata */
1197 if (st->ss->add_to_super)
1198 return array_try_spare(devname, dfdp, pol, target, bare,
1199 st, verbose);
1200 else
1201 return partition_try_spare(devname, dfdp, pol,
1202 st, verbose);
1203 }
1204 /* No metadata was specified or found so options are open.
1205 * Check for whether any array metadata, or any partition metadata
1206 * might allow adding the spare. This check is just help to avoid
1207 * a more costly scan of all arrays when we can be sure that will
1208 * fail.
1209 */
1210 for (i = 0; (!arrays_ok || !partitions_ok) && superlist[i] ; i++) {
1211 if (superlist[i]->add_to_super && !arrays_ok &&
1212 policy_action_allows(pol, superlist[i]->name, act_spare))
1213 arrays_ok = 1;
1214 if (superlist[i]->add_to_super == NULL && !partitions_ok &&
1215 policy_action_allows(pol, superlist[i]->name, act_spare))
1216 partitions_ok = 1;
1217 }
1218 rv = 1;
1219 if (arrays_ok)
1220 rv = array_try_spare(devname, dfdp, pol, target, bare,
1221 st, verbose);
1222 if (rv != 0 && partitions_ok)
1223 rv = partition_try_spare(devname, dfdp, pol, st, verbose);
1224 return rv;
1225 }
1226
1227 int IncrementalScan(int verbose)
1228 {
1229 /* look at every device listed in the 'map' file.
1230 * If one is found that is not running then:
1231 * look in mdadm.conf for bitmap file.
1232 * if one exists, but array has none, add it.
1233 * try to start array in auto-readonly mode
1234 */
1235 struct map_ent *mapl = NULL;
1236 struct map_ent *me;
1237 struct mddev_ident *devs, *mddev;
1238 int rv = 0;
1239
1240 map_read(&mapl);
1241 devs = conf_get_ident(NULL);
1242
1243 for (me = mapl ; me ; me = me->next) {
1244 mdu_array_info_t array;
1245 mdu_bitmap_file_t bmf;
1246 struct mdinfo *sra;
1247 int mdfd = open_dev(me->devnum);
1248
1249 if (mdfd < 0)
1250 continue;
1251 if (ioctl(mdfd, GET_ARRAY_INFO, &array) == 0 ||
1252 errno != ENODEV) {
1253 close(mdfd);
1254 continue;
1255 }
1256 /* Ok, we can try this one. Maybe it needs a bitmap */
1257 for (mddev = devs ; mddev ; mddev = mddev->next)
1258 if (mddev->devname && me->path
1259 && devname_matches(mddev->devname, me->path))
1260 break;
1261 if (mddev && mddev->bitmap_file) {
1262 /*
1263 * Note: early kernels will wrongly fail this, so it
1264 * is a hint only
1265 */
1266 int added = -1;
1267 if (ioctl(mdfd, GET_ARRAY_INFO, &bmf) < 0) {
1268 int bmfd = open(mddev->bitmap_file, O_RDWR);
1269 if (bmfd >= 0) {
1270 added = ioctl(mdfd, SET_BITMAP_FILE,
1271 bmfd);
1272 close(bmfd);
1273 }
1274 }
1275 if (verbose >= 0) {
1276 if (added == 0)
1277 pr_err("Added bitmap %s to %s\n",
1278 mddev->bitmap_file, me->path);
1279 else if (errno != EEXIST)
1280 pr_err("Failed to add bitmap to %s: %s\n",
1281 me->path, strerror(errno));
1282 }
1283 }
1284 sra = sysfs_read(mdfd, 0, 0);
1285 if (sra) {
1286 if (sysfs_set_str(sra, NULL,
1287 "array_state", "read-auto") == 0) {
1288 if (verbose >= 0)
1289 pr_err("started array %s\n",
1290 me->path ?: devnum2devname(me->devnum));
1291 } else {
1292 pr_err("failed to start array %s: %s\n",
1293 me->path ?: devnum2devname(me->devnum),
1294 strerror(errno));
1295 rv = 1;
1296 }
1297 sysfs_free(sra);
1298 }
1299 }
1300 return rv;
1301 }
1302
1303 static char *container2devname(char *devname)
1304 {
1305 char *mdname = NULL;
1306
1307 if (devname[0] == '/') {
1308 int fd = open(devname, O_RDONLY);
1309 if (fd >= 0) {
1310 mdname = devnum2devname(fd2devnum(fd));
1311 close(fd);
1312 }
1313 } else {
1314 int uuid[4];
1315 struct map_ent *mp, *map = NULL;
1316
1317 if (!parse_uuid(devname, uuid))
1318 return mdname;
1319 mp = map_by_uuid(&map, uuid);
1320 if (mp)
1321 mdname = devnum2devname(mp->devnum);
1322 map_free(map);
1323 }
1324
1325 return mdname;
1326 }
1327
1328 static int Incremental_container(struct supertype *st, char *devname,
1329 struct context *c)
1330 {
1331 /* Collect the contents of this container and for each
1332 * array, choose a device name and assemble the array.
1333 */
1334
1335 struct mdinfo *list;
1336 struct mdinfo *ra;
1337 struct map_ent *map = NULL;
1338 struct mdinfo info;
1339 int trustworthy;
1340 struct mddev_ident *match;
1341 int rv = 0;
1342 struct domainlist *domains;
1343 struct map_ent *smp;
1344 int suuid[4];
1345 int sfd;
1346 int ra_blocked = 0;
1347 int ra_all = 0;
1348
1349 st->ss->getinfo_super(st, &info, NULL);
1350
1351 if ((c->runstop > 0 && info.container_enough >= 0) ||
1352 info.container_enough > 0)
1353 /* pass */;
1354 else {
1355 if (c->verbose)
1356 pr_err("not enough devices to start the container\n");
1357 return 0;
1358 }
1359
1360 match = conf_match(st, &info, devname, c->verbose, &rv);
1361 if (match == NULL && rv == 2)
1362 return rv;
1363
1364 /* Need to compute 'trustworthy' */
1365 if (match)
1366 trustworthy = LOCAL;
1367 else if (st->ss->match_home(st, c->homehost) == 1)
1368 trustworthy = LOCAL;
1369 else if (st->ss->match_home(st, "any") == 1)
1370 trustworthy = LOCAL;
1371 else
1372 trustworthy = FOREIGN;
1373
1374 list = st->ss->container_content(st, NULL);
1375 /* when nothing to activate - quit */
1376 if (list == NULL)
1377 return 0;
1378 for (ra = list ; ra ; ra = ra->next) {
1379 int mdfd;
1380 char chosen_name[1024];
1381 struct map_ent *mp;
1382 struct mddev_ident *match = NULL;
1383
1384 ra_all++;
1385 /* do not activate arrays blocked by metadata handler */
1386 if (ra->array.state & (1 << MD_SB_BLOCK_VOLUME)) {
1387 pr_err("Cannot activate array %s in %s.\n",
1388 ra->text_version, devname);
1389 ra_blocked++;
1390 continue;
1391 }
1392 mp = map_by_uuid(&map, ra->uuid);
1393
1394 if (mp) {
1395 mdfd = open_dev(mp->devnum);
1396 if (mp->path)
1397 strcpy(chosen_name, mp->path);
1398 else
1399 strcpy(chosen_name, devnum2devname(mp->devnum));
1400 } else {
1401
1402 /* Check in mdadm.conf for container == devname and
1403 * member == ra->text_version after second slash.
1404 */
1405 char *sub = strchr(ra->text_version+1, '/');
1406 struct mddev_ident *array_list;
1407 if (sub) {
1408 sub++;
1409 array_list = conf_get_ident(NULL);
1410 } else
1411 array_list = NULL;
1412 for(; array_list ; array_list = array_list->next) {
1413 char *dn;
1414 if (array_list->member == NULL ||
1415 array_list->container == NULL)
1416 continue;
1417 if (strcmp(array_list->member, sub) != 0)
1418 continue;
1419 if (array_list->uuid_set &&
1420 !same_uuid(ra->uuid, array_list->uuid, st->ss->swapuuid))
1421 continue;
1422 dn = container2devname(array_list->container);
1423 if (dn == NULL)
1424 continue;
1425 if (strncmp(dn, ra->text_version+1,
1426 strlen(dn)) != 0 ||
1427 ra->text_version[strlen(dn)+1] != '/') {
1428 free(dn);
1429 continue;
1430 }
1431 free(dn);
1432 /* we have a match */
1433 match = array_list;
1434 if (c->verbose>0)
1435 pr_err("match found for member %s\n",
1436 array_list->member);
1437 break;
1438 }
1439
1440 if (match && match->devname &&
1441 strcasecmp(match->devname, "<ignore>") == 0) {
1442 if (c->verbose > 0)
1443 pr_err("array %s/%s is "
1444 "explicitly ignored by mdadm.conf\n",
1445 match->container, match->member);
1446 return 2;
1447 }
1448 if (match)
1449 trustworthy = LOCAL;
1450
1451 mdfd = create_mddev(match ? match->devname : NULL,
1452 ra->name,
1453 c->autof,
1454 trustworthy,
1455 chosen_name);
1456 }
1457
1458 if (mdfd < 0) {
1459 pr_err("failed to open %s: %s.\n",
1460 chosen_name, strerror(errno));
1461 return 2;
1462 }
1463
1464 assemble_container_content(st, mdfd, ra, c,
1465 chosen_name);
1466 close(mdfd);
1467 }
1468
1469 /* don't move spares to container with volume being activated
1470 when all volumes are blocked */
1471 if (ra_all == ra_blocked)
1472 return 0;
1473
1474 /* Now move all suitable spares from spare container */
1475 domains = domain_from_array(list, st->ss->name);
1476 memcpy(suuid, uuid_zero, sizeof(int[4]));
1477 if (domains &&
1478 (smp = map_by_uuid(&map, suuid)) != NULL &&
1479 (sfd = open(smp->path, O_RDONLY)) >= 0) {
1480 /* spare container found */
1481 struct supertype *sst =
1482 super_imsm.match_metadata_desc("imsm");
1483 struct mdinfo *sinfo;
1484 unsigned long long min_size = 0;
1485 if (st->ss->min_acceptable_spare_size)
1486 min_size = st->ss->min_acceptable_spare_size(st);
1487 if (!sst->ss->load_container(sst, sfd, NULL)) {
1488 close(sfd);
1489 sinfo = container_choose_spares(sst, min_size,
1490 domains, NULL,
1491 st->ss->name, 0);
1492 sst->ss->free_super(sst);
1493 if (sinfo){
1494 int count = 0;
1495 struct mdinfo *disks = sinfo->devs;
1496 while (disks) {
1497 /* move spare from spare
1498 * container to currently
1499 * assembled one
1500 */
1501 if (move_spare(
1502 smp->path,
1503 devname,
1504 makedev(disks->disk.major,
1505 disks->disk.minor)))
1506 count++;
1507 disks = disks->next;
1508 }
1509 if (count)
1510 pr_err("Added %d spare%s to %s\n",
1511 count, count>1?"s":"", devname);
1512 }
1513 sysfs_free(sinfo);
1514 } else
1515 close(sfd);
1516 }
1517 domain_free(domains);
1518 return 0;
1519 }
1520
1521 /*
1522 * IncrementalRemove - Attempt to see if the passed in device belongs to any
1523 * raid arrays, and if so first fail (if needed) and then remove the device.
1524 *
1525 * @devname - The device we want to remove
1526 * @id_path - name as found in /dev/disk/by-path for this device
1527 *
1528 * Note: the device name must be a kernel name like "sda", so
1529 * that we can find it in /proc/mdstat
1530 */
1531 int IncrementalRemove(char *devname, char *id_path, int verbose)
1532 {
1533 int mdfd;
1534 int rv;
1535 struct mdstat_ent *ent;
1536 struct mddev_dev devlist;
1537
1538 if (!id_path)
1539 dprintf(Name ": incremental removal without --path <id_path> "
1540 "lacks the possibility to re-add new device in this "
1541 "port\n");
1542
1543 if (strchr(devname, '/')) {
1544 pr_err("incremental removal requires a "
1545 "kernel device name, not a file: %s\n", devname);
1546 return 1;
1547 }
1548 ent = mdstat_by_component(devname);
1549 if (!ent) {
1550 pr_err("%s does not appear to be a component "
1551 "of any array\n", devname);
1552 return 1;
1553 }
1554 mdfd = open_dev(ent->devnum);
1555 if (mdfd < 0) {
1556 pr_err("Cannot open array %s!!\n", ent->dev);
1557 free_mdstat(ent);
1558 return 1;
1559 }
1560
1561 if (id_path) {
1562 struct map_ent *map = NULL, *me;
1563 me = map_by_devnum(&map, ent->devnum);
1564 if (me)
1565 policy_save_path(id_path, me);
1566 map_free(map);
1567 }
1568
1569 memset(&devlist, 0, sizeof(devlist));
1570 devlist.devname = devname;
1571 devlist.disposition = 'f';
1572 /* for a container, we must fail each member array */
1573 if (ent->metadata_version &&
1574 strncmp(ent->metadata_version, "external:", 9) == 0) {
1575 struct mdstat_ent *mdstat = mdstat_read(0, 0);
1576 struct mdstat_ent *memb;
1577 for (memb = mdstat ; memb ; memb = memb->next)
1578 if (is_container_member(memb, ent->dev)) {
1579 int subfd = open_dev(memb->devnum);
1580 if (subfd >= 0) {
1581 Manage_subdevs(memb->dev, subfd,
1582 &devlist, verbose, 0,
1583 NULL, 0);
1584 close(subfd);
1585 }
1586 }
1587 free_mdstat(mdstat);
1588 } else
1589 Manage_subdevs(ent->dev, mdfd, &devlist, verbose, 0, NULL, 0);
1590 devlist.disposition = 'r';
1591 rv = Manage_subdevs(ent->dev, mdfd, &devlist, verbose, 0, NULL, 0);
1592 close(mdfd);
1593 free_mdstat(ent);
1594 return rv;
1595 }
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