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[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);
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)
131 st->ignore_hw_compat = 1;
132 if (st && st->ss->load_container)
133 rv = st->ss->load_container(st, dfd, NULL);
134
135 close(dfd);
136 if (!rv && st->ss->container_content) {
137 if (map_lock(&map))
138 pr_err("failed to get "
139 "exclusive lock on mapfile\n");
140 rv = Incremental_container(st, devname, c);
141 map_unlock(&map);
142 return rv;
143 }
144
145 pr_err("%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 (c->verbose >= 0)
154 pr_err("%s not permitted by mdadm.conf.\n",
155 devname);
156 goto out;
157 }
158
159 /* 2/ Find metadata, reject if none appropriate (check
160 * version/name from args) */
161
162 if (fstat(dfd, &stb) < 0) {
163 if (c->verbose >= 0)
164 pr_err("fstat failed for %s: %s.\n",
165 devname, strerror(errno));
166 goto out;
167 }
168 if ((stb.st_mode & S_IFMT) != S_IFBLK) {
169 if (c->verbose >= 0)
170 pr_err("%s is not a block device.\n",
171 devname);
172 goto out;
173 }
174
175 dinfo.disk.major = major(stb.st_rdev);
176 dinfo.disk.minor = minor(stb.st_rdev);
177
178 policy = disk_policy(&dinfo);
179 have_target = policy_check_path(&dinfo, &target_array);
180
181 if (st == NULL && (st = guess_super(dfd)) == NULL) {
182 if (c->verbose >= 0)
183 pr_err("no recognisable superblock on %s.\n",
184 devname);
185 rv = try_spare(devname, &dfd, policy,
186 have_target ? &target_array : NULL,
187 st, c->verbose);
188 goto out;
189 }
190 st->ignore_hw_compat = 1;
191 if (st->ss->compare_super == NULL ||
192 st->ss->load_super(st, dfd, NULL)) {
193 if (c->verbose >= 0)
194 pr_err("no RAID superblock on %s.\n",
195 devname);
196 rv = try_spare(devname, &dfd, policy,
197 have_target ? &target_array : NULL,
198 st, c->verbose);
199 free(st);
200 goto out;
201 }
202 close (dfd); dfd = -1;
203
204 st->ss->getinfo_super(st, &info, NULL);
205
206 /* 3/ Check if there is a match in mdadm.conf */
207 match = conf_match(st, &info, devname, c->verbose, &rv);
208 if (!match && rv == 2)
209 goto out;
210
211 if (match && match->devname
212 && strcasecmp(match->devname, "<ignore>") == 0) {
213 if (c->verbose >= 0)
214 pr_err("array containing %s is explicitly"
215 " ignored by mdadm.conf\n",
216 devname);
217 goto out;
218 }
219
220 /* 3a/ if not, check for homehost match. If no match, continue
221 * but don't trust the 'name' in the array. Thus a 'random' minor
222 * number will be assigned, and the device name will be based
223 * on that. */
224 if (match)
225 trustworthy = LOCAL;
226 else if (st->ss->match_home(st, c->homehost) == 1)
227 trustworthy = LOCAL;
228 else if (st->ss->match_home(st, "any") == 1)
229 trustworthy = LOCAL_ANY;
230 else
231 trustworthy = FOREIGN;
232
233 if (!match && !conf_test_metadata(st->ss->name, policy,
234 (trustworthy == LOCAL))) {
235 if (c->verbose >= 1)
236 pr_err("%s has metadata type %s for which "
237 "auto-assembly is disabled\n",
238 devname, st->ss->name);
239 goto out;
240 }
241 if (trustworthy == LOCAL_ANY)
242 trustworthy = LOCAL;
243
244 /* There are three possible sources for 'autof': command line,
245 * ARRAY line in mdadm.conf, or CREATE line in mdadm.conf.
246 * ARRAY takes precedence, then command line, then
247 * CREATE.
248 */
249 if (match && match->autof)
250 c->autof = match->autof;
251 if (c->autof == 0)
252 c->autof = ci->autof;
253
254 name_to_use = info.name;
255 if (name_to_use[0] == 0 &&
256 info.array.level == LEVEL_CONTAINER) {
257 name_to_use = info.text_version;
258 trustworthy = METADATA;
259 }
260 if (name_to_use[0] && trustworthy != LOCAL &&
261 ! c->require_homehost &&
262 conf_name_is_free(name_to_use))
263 trustworthy = LOCAL;
264
265 /* strip "hostname:" prefix from name if we have decided
266 * to treat it as LOCAL
267 */
268 if (trustworthy == LOCAL && strchr(name_to_use, ':') != NULL)
269 name_to_use = strchr(name_to_use, ':')+1;
270
271 /* 4/ Check if array exists.
272 */
273 if (map_lock(&map))
274 pr_err("failed to get exclusive lock on "
275 "mapfile\n");
276 /* Now check we can get O_EXCL. If not, probably "mdadm -A" has
277 * taken over
278 */
279 dfd = dev_open(devname, O_RDONLY|O_EXCL);
280 if (dfd < 0) {
281 if (c->verbose >= 0)
282 pr_err("cannot reopen %s: %s.\n",
283 devname, strerror(errno));
284 goto out_unlock;
285 }
286 /* Cannot hold it open while we add the device to the array,
287 * so we must release the O_EXCL and depend on the map_lock()
288 */
289 close(dfd);
290 dfd = -1;
291
292 mp = map_by_uuid(&map, info.uuid);
293 if (mp)
294 mdfd = open_dev(mp->devnum);
295 else
296 mdfd = -1;
297
298 if (mdfd < 0) {
299
300 /* Couldn't find an existing array, maybe make a new one */
301 mdfd = create_mddev(match ? match->devname : NULL,
302 name_to_use, c->autof, trustworthy, chosen_name);
303
304 if (mdfd < 0)
305 goto out_unlock;
306
307 sysfs_init(&info, mdfd, 0);
308
309 if (set_array_info(mdfd, st, &info) != 0) {
310 pr_err("failed to set array info for %s: %s\n",
311 chosen_name, strerror(errno));
312 rv = 2;
313 goto out_unlock;
314 }
315
316 dinfo = info;
317 dinfo.disk.major = major(stb.st_rdev);
318 dinfo.disk.minor = minor(stb.st_rdev);
319 if (add_disk(mdfd, st, &info, &dinfo) != 0) {
320 pr_err("failed to add %s to %s: %s.\n",
321 devname, chosen_name, strerror(errno));
322 ioctl(mdfd, STOP_ARRAY, 0);
323 rv = 2;
324 goto out_unlock;
325 }
326 sra = sysfs_read(mdfd, -1, (GET_DEVS | GET_STATE |
327 GET_OFFSET | GET_SIZE));
328
329 if (!sra || !sra->devs || sra->devs->disk.raid_disk >= 0) {
330 /* It really should be 'none' - must be old buggy
331 * kernel, and mdadm -I may not be able to complete.
332 * So reject it.
333 */
334 ioctl(mdfd, STOP_ARRAY, NULL);
335 pr_err("You have an old buggy kernel which cannot support\n"
336 " --incremental reliably. Aborting.\n");
337 rv = 2;
338 goto out_unlock;
339 }
340 info.array.working_disks = 1;
341 /* 6/ Make sure /var/run/mdadm.map contains this array. */
342 map_update(&map, fd2devnum(mdfd),
343 info.text_version,
344 info.uuid, chosen_name);
345 } else {
346 /* 5b/ if it does */
347 /* - check one drive in array to make sure metadata is a reasonably */
348 /* close match. Reject if not (e.g. different type) */
349 /* - add the device */
350 char dn[20];
351 int dfd2;
352 int err;
353 struct supertype *st2;
354 struct mdinfo info2, *d;
355
356 sra = sysfs_read(mdfd, -1, (GET_DEVS | GET_STATE |
357 GET_OFFSET | GET_SIZE));
358
359 if (mp->path)
360 strcpy(chosen_name, mp->path);
361 else
362 strcpy(chosen_name, devnum2devname(mp->devnum));
363
364 /* It is generally not OK to add non-spare drives to a
365 * running array as they are probably missing because
366 * they failed. However if runstop is 1, then the
367 * array was possibly started early and our best bet is
368 * to add this anyway.
369 * Also if action policy is re-add or better we allow
370 * re-add.
371 * This doesn't apply to containers as the 'non-spare'
372 * flag has a different meaning. The test has to happen
373 * at the device level there
374 */
375 if (!st->ss->external
376 && (info.disk.state & (1<<MD_DISK_SYNC)) != 0
377 && ! policy_action_allows(policy, st->ss->name,
378 act_re_add)
379 && c->runstop < 1) {
380 if (ioctl(mdfd, GET_ARRAY_INFO, &ainf) == 0) {
381 pr_err("not adding %s to active array (without --run) %s\n",
382 devname, chosen_name);
383 rv = 2;
384 goto out_unlock;
385 }
386 }
387 if (!sra) {
388 rv = 2;
389 goto out_unlock;
390 }
391 if (sra->devs) {
392 sprintf(dn, "%d:%d", sra->devs->disk.major,
393 sra->devs->disk.minor);
394 dfd2 = dev_open(dn, O_RDONLY);
395 if (dfd2 < 0) {
396 pr_err("unable to open %s\n", devname);
397 rv = 2;
398 goto out_unlock;
399 }
400 st2 = dup_super(st);
401 if (st2->ss->load_super(st2, dfd2, NULL) ||
402 st->ss->compare_super(st, st2) != 0) {
403 pr_err("metadata mismatch between %s and "
404 "chosen array %s\n",
405 devname, chosen_name);
406 close(dfd2);
407 rv = 2;
408 goto out_unlock;
409 }
410 close(dfd2);
411 st2->ss->getinfo_super(st2, &info2, NULL);
412 st2->ss->free_super(st2);
413 if (info.array.level != info2.array.level ||
414 memcmp(info.uuid, info2.uuid, 16) != 0 ||
415 info.array.raid_disks != info2.array.raid_disks) {
416 pr_err("unexpected difference between %s and %s.\n",
417 chosen_name, devname);
418 rv = 2;
419 goto out_unlock;
420 }
421 }
422 info.disk.major = major(stb.st_rdev);
423 info.disk.minor = minor(stb.st_rdev);
424 /* add disk needs to know about containers */
425 if (st->ss->external)
426 sra->array.level = LEVEL_CONTAINER;
427 err = add_disk(mdfd, st, sra, &info);
428 if (err < 0 && errno == EBUSY) {
429 /* could be another device present with the same
430 * disk.number. Find and reject any such
431 */
432 find_reject(mdfd, st, sra, info.disk.number,
433 info.events, c->verbose, chosen_name);
434 err = add_disk(mdfd, st, sra, &info);
435 }
436 if (err < 0) {
437 pr_err("failed to add %s to %s: %s.\n",
438 devname, chosen_name, strerror(errno));
439 rv = 2;
440 goto out_unlock;
441 }
442 info.array.working_disks = 0;
443 for (d = sra->devs; d; d=d->next)
444 info.array.working_disks ++;
445
446 }
447
448 /* 7/ Is there enough devices to possibly start the array? */
449 /* 7a/ if not, finish with success. */
450 if (info.array.level == LEVEL_CONTAINER) {
451 int devnum = devnum; /* defined and used iff ->external */
452 /* Try to assemble within the container */
453 sysfs_uevent(sra, "change");
454 if (c->verbose >= 0)
455 pr_err("container %s now has %d device%s\n",
456 chosen_name, info.array.working_disks,
457 info.array.working_disks == 1?"":"s");
458 wait_for(chosen_name, mdfd);
459 if (st->ss->external)
460 devnum = fd2devnum(mdfd);
461 if (st->ss->load_container)
462 rv = st->ss->load_container(st, mdfd, NULL);
463 close(mdfd);
464 sysfs_free(sra);
465 if (!rv)
466 rv = Incremental_container(st, chosen_name, c);
467 map_unlock(&map);
468 if (rv == 1)
469 /* Don't fail the whole -I if a subarray didn't
470 * have enough devices to start yet
471 */
472 rv = 0;
473 /* after spare is added, ping monitor for external metadata
474 * so that it can eg. try to rebuild degraded array */
475 if (st->ss->external)
476 ping_monitor_by_id(devnum);
477 return rv;
478 }
479
480 /* We have added something to the array, so need to re-read the
481 * state. Eventually this state should be kept up-to-date as
482 * things change.
483 */
484 sysfs_free(sra);
485 sra = sysfs_read(mdfd, -1, (GET_DEVS | GET_STATE |
486 GET_OFFSET | GET_SIZE));
487 active_disks = count_active(st, sra, mdfd, &avail, &info);
488 if (enough(info.array.level, info.array.raid_disks,
489 info.array.layout, info.array.state & 1,
490 avail) == 0) {
491 if (c->verbose >= 0)
492 pr_err("%s attached to %s, not enough to start (%d).\n",
493 devname, chosen_name, active_disks);
494 rv = 0;
495 goto out_unlock;
496 }
497
498 /* 7b/ if yes, */
499 /* - if number of OK devices match expected, or -R and there */
500 /* are enough, */
501 /* + add any bitmap file */
502 /* + start the array (auto-readonly). */
503
504 if (ioctl(mdfd, GET_ARRAY_INFO, &ainf) == 0) {
505 if (c->verbose >= 0)
506 pr_err("%s attached to %s which is already active.\n",
507 devname, chosen_name);
508 rv = 0;
509 goto out_unlock;
510 }
511
512 map_unlock(&map);
513 if (c->runstop > 0 || active_disks >= info.array.working_disks) {
514 struct mdinfo *dsk;
515 /* Let's try to start it */
516
517 if (info.reshape_active && !(info.reshape_active & RESHAPE_NO_BACKUP)) {
518 fprintf(stderr, Name
519 ": %s: This array is being reshaped and cannot be started\n"
520 " by --incremental. Please use --assemble\n",
521 chosen_name);
522 goto out;
523 }
524 if (match && match->bitmap_file) {
525 int bmfd = open(match->bitmap_file, O_RDWR);
526 if (bmfd < 0) {
527 pr_err("Could not open bitmap file %s.\n",
528 match->bitmap_file);
529 goto out;
530 }
531 if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) {
532 close(bmfd);
533 pr_err("Failed to set bitmapfile for %s.\n",
534 chosen_name);
535 goto out;
536 }
537 close(bmfd);
538 }
539 /* Need to remove from the array any devices which
540 * 'count_active' discerned were too old or inappropriate
541 */
542 for (d = sra ? sra->devs : NULL ; d ; d = d->next)
543 if (d->disk.state & (1<<MD_DISK_REMOVED))
544 remove_disk(mdfd, st, sra, d);
545
546 if ((sra == NULL || active_disks >= info.array.working_disks)
547 && trustworthy != FOREIGN)
548 rv = ioctl(mdfd, RUN_ARRAY, NULL);
549 else
550 rv = sysfs_set_str(sra, NULL,
551 "array_state", "read-auto");
552 if (rv == 0) {
553 if (c->verbose >= 0)
554 pr_err("%s attached to %s, which has been started.\n",
555 devname, chosen_name);
556 rv = 0;
557 wait_for(chosen_name, mdfd);
558 /* We just started the array, so some devices
559 * might have been evicted from the array
560 * because their event counts were too old.
561 * If the action=re-add policy is in-force for
562 * those devices we should re-add them now.
563 */
564 for (dsk = sra->devs; dsk ; dsk = dsk->next) {
565 if (disk_action_allows(dsk, st->ss->name, act_re_add) &&
566 add_disk(mdfd, st, sra, dsk) == 0)
567 pr_err("%s re-added to %s\n",
568 dsk->sys_name, chosen_name);
569 }
570 } else {
571 pr_err("%s attached to %s, but failed to start: %s.\n",
572 devname, chosen_name, strerror(errno));
573 rv = 1;
574 }
575 } else {
576 if (c->verbose >= 0)
577 pr_err("%s attached to %s, not enough to start safely.\n",
578 devname, chosen_name);
579 rv = 0;
580 }
581 out:
582 free(avail);
583 if (dfd >= 0)
584 close(dfd);
585 if (mdfd >= 0)
586 close(mdfd);
587 if (policy)
588 dev_policy_free(policy);
589 if (sra)
590 sysfs_free(sra);
591 return rv;
592 out_unlock:
593 map_unlock(&map);
594 goto out;
595 }
596
597 static void find_reject(int mdfd, struct supertype *st, struct mdinfo *sra,
598 int number, __u64 events, int verbose,
599 char *array_name)
600 {
601 /* Find a device attached to this array with a disk.number of number
602 * and events less than the passed events, and remove the device.
603 */
604 struct mdinfo *d;
605 mdu_array_info_t ra;
606
607 if (ioctl(mdfd, GET_ARRAY_INFO, &ra) == 0)
608 return; /* not safe to remove from active arrays
609 * without thinking more */
610
611 for (d = sra->devs; d ; d = d->next) {
612 char dn[10];
613 int dfd;
614 struct mdinfo info;
615 sprintf(dn, "%d:%d", d->disk.major, d->disk.minor);
616 dfd = dev_open(dn, O_RDONLY);
617 if (dfd < 0)
618 continue;
619 if (st->ss->load_super(st, dfd, NULL)) {
620 close(dfd);
621 continue;
622 }
623 st->ss->getinfo_super(st, &info, NULL);
624 st->ss->free_super(st);
625 close(dfd);
626
627 if (info.disk.number != number ||
628 info.events >= events)
629 continue;
630
631 if (d->disk.raid_disk > -1)
632 sysfs_set_str(sra, d, "slot", "none");
633 if (sysfs_set_str(sra, d, "state", "remove") == 0)
634 if (verbose >= 0)
635 pr_err("removing old device %s from %s\n",
636 d->sys_name+4, array_name);
637 }
638 }
639
640 static int count_active(struct supertype *st, struct mdinfo *sra,
641 int mdfd, char **availp,
642 struct mdinfo *bestinfo)
643 {
644 /* count how many devices in sra think they are active */
645 struct mdinfo *d;
646 int cnt = 0;
647 int replcnt = 0;
648 __u64 max_events = 0;
649 char *avail = NULL;
650 int *best = NULL;
651 char *devmap = NULL;
652 int numdevs = 0;
653 int devnum;
654 int b, i;
655 int raid_disks = 0;
656
657 if (!sra)
658 return 0;
659
660 for (d = sra->devs ; d ; d = d->next)
661 numdevs++;
662 for (d = sra->devs, devnum = 0 ; d ; d = d->next, devnum++) {
663 char dn[30];
664 int dfd;
665 int ok;
666 struct mdinfo info;
667
668 sprintf(dn, "%d:%d", d->disk.major, d->disk.minor);
669 dfd = dev_open(dn, O_RDONLY);
670 if (dfd < 0)
671 continue;
672 ok = st->ss->load_super(st, dfd, NULL);
673 close(dfd);
674 if (ok != 0)
675 continue;
676 info.array.raid_disks = raid_disks;
677 st->ss->getinfo_super(st, &info, devmap + raid_disks * devnum);
678 if (!avail) {
679 raid_disks = info.array.raid_disks;
680 avail = xcalloc(raid_disks, 1);
681 *availp = avail;
682
683 best = xcalloc(raid_disks, sizeof(int));
684 devmap = xcalloc(raid_disks, numdevs);
685
686 st->ss->getinfo_super(st, &info, devmap);
687 }
688
689 if (info.disk.state & (1<<MD_DISK_SYNC))
690 {
691 if (cnt == 0) {
692 cnt++;
693 max_events = info.events;
694 avail[info.disk.raid_disk] = 2;
695 best[info.disk.raid_disk] = devnum;
696 st->ss->getinfo_super(st, bestinfo, NULL);
697 } else if (info.events == max_events) {
698 avail[info.disk.raid_disk] = 2;
699 best[info.disk.raid_disk] = devnum;
700 } else if (info.events == max_events-1) {
701 if (avail[info.disk.raid_disk] == 0) {
702 avail[info.disk.raid_disk] = 1;
703 best[info.disk.raid_disk] = devnum;
704 }
705 } else if (info.events < max_events - 1)
706 ;
707 else if (info.events == max_events+1) {
708 int i;
709 max_events = info.events;
710 for (i = 0; i < raid_disks; i++)
711 if (avail[i])
712 avail[i]--;
713 avail[info.disk.raid_disk] = 2;
714 best[info.disk.raid_disk] = devnum;
715 st->ss->getinfo_super(st, bestinfo, NULL);
716 } else { /* info.events much bigger */
717 memset(avail, 0, raid_disks);
718 max_events = info.events;
719 avail[info.disk.raid_disk] = 2;
720 best[info.disk.raid_disk] = devnum;
721 st->ss->getinfo_super(st, bestinfo, NULL);
722 }
723 } else if (info.disk.state & (1<<MD_DISK_REPLACEMENT))
724 replcnt++;
725 st->ss->free_super(st);
726 }
727 if (!avail)
728 return 0;
729 /* We need to reject any device that thinks the best device is
730 * failed or missing */
731 for (b = 0; b < raid_disks; b++)
732 if (avail[b] == 2)
733 break;
734 cnt = 0;
735 for (i = 0 ; i < raid_disks ; i++) {
736 if (i != b && avail[i])
737 if (devmap[raid_disks * best[i] + b] == 0) {
738 /* This device thinks 'b' is failed -
739 * don't use it */
740 devnum = best[i];
741 for (d=sra->devs ; devnum; d = d->next)
742 devnum--;
743 d->disk.state |= (1 << MD_DISK_REMOVED);
744 avail[i] = 0;
745 }
746 if (avail[i])
747 cnt++;
748 }
749 free(best);
750 free(devmap);
751 return cnt + replcnt;
752 }
753
754 /* test if container has degraded member(s) */
755 static int container_members_max_degradation(struct map_ent *map, struct map_ent *me)
756 {
757 mdu_array_info_t array;
758 int afd;
759 int max_degraded = 0;
760
761 for(; map; map = map->next) {
762 if (!is_subarray(map->metadata) ||
763 devname2devnum(map->metadata+1) != me->devnum)
764 continue;
765 afd = open_dev(map->devnum);
766 if (afd < 0)
767 continue;
768 /* most accurate information regarding array degradation */
769 if (ioctl(afd, GET_ARRAY_INFO, &array) >= 0) {
770 int degraded = array.raid_disks - array.active_disks -
771 array.spare_disks;
772 if (degraded > max_degraded)
773 max_degraded = degraded;
774 }
775 close(afd);
776 }
777 return (max_degraded);
778 }
779
780 static int array_try_spare(char *devname, int *dfdp, struct dev_policy *pol,
781 struct map_ent *target, int bare,
782 struct supertype *st, int verbose)
783 {
784 /* This device doesn't have any md metadata
785 * The device policy allows 'spare' and if !bare, it allows spare-same-slot.
786 * If 'st' is not set, then we only know that some metadata allows this,
787 * others possibly don't.
788 * So look for a container or array to attach the device to.
789 * Prefer 'target' if that is set and the array is found.
790 *
791 * If st is set, then only arrays of that type are considered
792 * Return 0 on success, or some exit code on failure, probably 1.
793 */
794 int rv = 1;
795 struct stat stb;
796 struct map_ent *mp, *map = NULL;
797 struct mdinfo *chosen = NULL;
798 int dfd = *dfdp;
799
800 if (fstat(dfd, &stb) != 0)
801 return 1;
802
803 /*
804 * Now we need to find a suitable array to add this to.
805 * We only accept arrays that:
806 * - match 'st'
807 * - are in the same domains as the device
808 * - are of an size for which the device will be useful
809 * and we choose the one that is the most degraded
810 */
811
812 if (map_lock(&map)) {
813 pr_err("failed to get exclusive lock on "
814 "mapfile\n");
815 return 1;
816 }
817 for (mp = map ; mp ; mp = mp->next) {
818 struct supertype *st2;
819 struct domainlist *dl = NULL;
820 struct mdinfo *sra;
821 unsigned long long devsize;
822 unsigned long long component_size = 0;
823
824 if (is_subarray(mp->metadata))
825 continue;
826 if (st) {
827 st2 = st->ss->match_metadata_desc(mp->metadata);
828 if (!st2 ||
829 (st->minor_version >= 0 &&
830 st->minor_version != st2->minor_version)) {
831 if (verbose > 1)
832 pr_err("not adding %s to %s as metadata type doesn't match\n",
833 devname, mp->path);
834 free(st2);
835 continue;
836 }
837 free(st2);
838 }
839 sra = sysfs_read(-1, mp->devnum,
840 GET_DEVS|GET_OFFSET|GET_SIZE|GET_STATE|
841 GET_DEGRADED|GET_COMPONENT|GET_VERSION);
842 if (!sra) {
843 /* Probably a container - no degraded info */
844 sra = sysfs_read(-1, mp->devnum,
845 GET_DEVS|GET_OFFSET|GET_SIZE|GET_STATE|
846 GET_COMPONENT|GET_VERSION);
847 if (sra)
848 sra->array.failed_disks = -1;
849 }
850 if (!sra)
851 continue;
852 if (st == NULL) {
853 int i;
854 st2 = NULL;
855 for(i = 0; !st2 && superlist[i]; i++)
856 st2 = superlist[i]->match_metadata_desc(
857 sra->text_version);
858 if (!st2) {
859 if (verbose > 1)
860 pr_err("not adding %s to %s"
861 " as metadata not recognised.\n",
862 devname, mp->path);
863 goto next;
864 }
865 /* Need to double check the 'act_spare' permissions applies
866 * to this metadata.
867 */
868 if (!policy_action_allows(pol, st2->ss->name, act_spare))
869 goto next;
870 if (!bare && !policy_action_allows(pol, st2->ss->name,
871 act_spare_same_slot))
872 goto next;
873 } else
874 st2 = st;
875 /* update number of failed disks for mostly degraded
876 * container member */
877 if (sra->array.failed_disks == -1)
878 sra->array.failed_disks = container_members_max_degradation(map, mp);
879
880 get_dev_size(dfd, NULL, &devsize);
881 if (sra->component_size == 0) {
882 /* true for containers, here we must read superblock
883 * to obtain minimum spare size */
884 struct supertype *st3 = dup_super(st2);
885 int mdfd = open_dev(mp->devnum);
886 if (mdfd < 0) {
887 free(st3);
888 goto next;
889 }
890 if (st3->ss->load_container &&
891 !st3->ss->load_container(st3, mdfd, mp->path)) {
892 component_size = st3->ss->min_acceptable_spare_size(st3);
893 st3->ss->free_super(st3);
894 }
895 free(st3);
896 close(mdfd);
897 }
898 if ((sra->component_size > 0 &&
899 st2->ss->avail_size(st2, devsize,
900 sra->devs
901 ? sra->devs->data_offset
902 : INVALID_SECTORS)
903 < sra->component_size)
904 ||
905 (sra->component_size == 0 && devsize < component_size)) {
906 if (verbose > 1)
907 pr_err("not adding %s to %s as it is too small\n",
908 devname, mp->path);
909 goto next;
910 }
911 /* test against target.
912 * If 'target' is set and 'bare' is false, we only accept
913 * arrays/containers that match 'target'.
914 * If 'target' is set and 'bare' is true, we prefer the
915 * array which matches 'target'.
916 * target is considered only if we deal with degraded array
917 */
918 if (target && policy_action_allows(pol, st2->ss->name,
919 act_spare_same_slot)) {
920 if (strcmp(target->metadata, mp->metadata) == 0 &&
921 memcmp(target->uuid, mp->uuid,
922 sizeof(target->uuid)) == 0 &&
923 sra->array.failed_disks > 0) {
924 /* This is our target!! */
925 if (chosen)
926 sysfs_free(chosen);
927 chosen = sra;
928 sra = NULL;
929 /* skip to end so we don't check any more */
930 while (mp->next)
931 mp = mp->next;
932 goto next;
933 }
934 /* not our target */
935 if (!bare)
936 goto next;
937 }
938
939 dl = domain_from_array(sra, st2->ss->name);
940 if (domain_test(dl, pol, st2->ss->name) != 1) {
941 /* domain test fails */
942 if (verbose > 1)
943 pr_err("not adding %s to %s as"
944 " it is not in a compatible domain\n",
945 devname, mp->path);
946
947 goto next;
948 }
949 /* all tests passed, OK to add to this array */
950 if (!chosen) {
951 chosen = sra;
952 sra = NULL;
953 } else if (chosen->array.failed_disks < sra->array.failed_disks) {
954 sysfs_free(chosen);
955 chosen = sra;
956 sra = NULL;
957 }
958 next:
959 if (sra)
960 sysfs_free(sra);
961 if (st != st2)
962 free(st2);
963 if (dl)
964 domain_free(dl);
965 }
966 if (chosen) {
967 /* add current device to chosen array as a spare */
968 int mdfd = open_dev(devname2devnum(chosen->sys_name));
969 if (mdfd >= 0) {
970 struct mddev_dev devlist;
971 char devname[20];
972 devlist.next = NULL;
973 devlist.used = 0;
974 devlist.writemostly = 0;
975 devlist.devname = devname;
976 sprintf(devname, "%d:%d", major(stb.st_rdev),
977 minor(stb.st_rdev));
978 devlist.disposition = 'a';
979 close(dfd);
980 *dfdp = -1;
981 rv = Manage_subdevs(chosen->sys_name, mdfd, &devlist,
982 -1, 0, NULL, 0);
983 close(mdfd);
984 }
985 if (verbose > 0) {
986 if (rv == 0)
987 pr_err("added %s as spare for %s\n",
988 devname, chosen->sys_name);
989 else
990 pr_err("failed to add %s as spare for %s\n",
991 devname, chosen->sys_name);
992 }
993 sysfs_free(chosen);
994 }
995 map_unlock(&map);
996 return rv;
997 }
998
999 static int partition_try_spare(char *devname, int *dfdp, struct dev_policy *pol,
1000 struct supertype *st, int verbose)
1001 {
1002 /* we know that at least one partition virtual-metadata is
1003 * allowed to incorporate spares like this device. We need to
1004 * find a suitable device to copy partition information from.
1005 *
1006 * Getting a list of all disk (not partition) devices is
1007 * slightly non-trivial. We could look at /sys/block, but
1008 * that is theoretically due to be removed. Maybe best to use
1009 * /dev/disk/by-path/?* and ignore names ending '-partNN' as
1010 * we depend on this directory of 'path' info. But that fails
1011 * to find loop devices and probably others. Maybe don't
1012 * worry about that, they aren't the real target.
1013 *
1014 * So: check things in /dev/disk/by-path to see if they are in
1015 * a compatible domain, then load the partition table and see
1016 * if it is OK for the new device, and choose the largest
1017 * partition table that fits.
1018 */
1019 DIR *dir;
1020 struct dirent *de;
1021 char *chosen = NULL;
1022 unsigned long long chosen_size = 0;
1023 struct supertype *chosen_st = NULL;
1024 int fd;
1025
1026 dir = opendir("/dev/disk/by-path");
1027 if (!dir)
1028 return 1;
1029 while ((de = readdir(dir)) != NULL) {
1030 char *ep;
1031 struct dev_policy *pol2 = NULL;
1032 struct domainlist *domlist = NULL;
1033 int fd = -1;
1034 struct mdinfo info;
1035 struct supertype *st2 = NULL;
1036 char *devname = NULL;
1037 unsigned long long devsectors;
1038
1039 if (de->d_ino == 0 ||
1040 de->d_name[0] == '.' ||
1041 (de->d_type != DT_LNK && de->d_type != DT_UNKNOWN))
1042 goto next;
1043
1044 ep = de->d_name + strlen(de->d_name);
1045 while (ep > de->d_name &&
1046 isdigit(ep[-1]))
1047 ep--;
1048 if (ep > de->d_name + 5 &&
1049 strncmp(ep-5, "-part", 5) == 0)
1050 /* This is a partition - skip it */
1051 goto next;
1052
1053 pol2 = path_policy(de->d_name, type_disk);
1054
1055 domain_merge(&domlist, pol2, st ? st->ss->name : NULL);
1056 if (domain_test(domlist, pol, st ? st->ss->name : NULL) != 1)
1057 /* new device is incompatible with this device. */
1058 goto next;
1059
1060 domain_free(domlist);
1061 domlist = NULL;
1062
1063 if (asprintf(&devname, "/dev/disk/by-path/%s", de->d_name) != 1) {
1064 devname = NULL;
1065 goto next;
1066 }
1067 fd = open(devname, O_RDONLY);
1068 if (fd < 0)
1069 goto next;
1070 if (get_dev_size(fd, devname, &devsectors) == 0)
1071 goto next;
1072 devsectors >>= 9;
1073
1074 if (st)
1075 st2 = dup_super(st);
1076 else
1077 st2 = guess_super_type(fd, guess_partitions);
1078 if (st2 == NULL ||
1079 st2->ss->load_super(st2, fd, NULL) < 0)
1080 goto next;
1081
1082 if (!st) {
1083 /* Check domain policy again, this time referring to metadata */
1084 domain_merge(&domlist, pol2, st2->ss->name);
1085 if (domain_test(domlist, pol, st2->ss->name) != 1)
1086 /* Incompatible devices for this metadata type */
1087 goto next;
1088 if (!policy_action_allows(pol, st2->ss->name, act_spare))
1089 /* Some partition types allow sparing, but not
1090 * this one.
1091 */
1092 goto next;
1093 }
1094
1095 st2->ss->getinfo_super(st2, &info, NULL);
1096 if (info.component_size > devsectors)
1097 /* This partitioning doesn't fit in the device */
1098 goto next;
1099
1100 /* This is an acceptable device to copy partition
1101 * metadata from. We could just stop here, but I
1102 * think I want to keep looking incase a larger
1103 * metadata which makes better use of the device can
1104 * be found.
1105 */
1106 if (chosen == NULL ||
1107 chosen_size < info.component_size) {
1108 chosen_size = info.component_size;
1109 free(chosen);
1110 chosen = devname;
1111 devname = NULL;
1112 if (chosen_st) {
1113 chosen_st->ss->free_super(chosen_st);
1114 free(chosen_st);
1115 }
1116 chosen_st = st2;
1117 st2 = NULL;
1118 }
1119
1120 next:
1121 free(devname);
1122 domain_free(domlist);
1123 dev_policy_free(pol2);
1124 if (st2)
1125 st2->ss->free_super(st2);
1126 free(st2);
1127
1128 if (fd >= 0)
1129 close(fd);
1130 }
1131
1132 closedir(dir);
1133
1134 if (!chosen)
1135 return 1;
1136
1137 /* 'chosen' is the best device we can find. Let's write its
1138 * metadata to devname dfd is read-only so don't use that
1139 */
1140 fd = open(devname, O_RDWR);
1141 if (fd >= 0) {
1142 chosen_st->ss->store_super(chosen_st, fd);
1143 close(fd);
1144 }
1145 free(chosen);
1146 chosen_st->ss->free_super(chosen_st);
1147 free(chosen_st);
1148 return 0;
1149 }
1150
1151 static int is_bare(int dfd)
1152 {
1153 unsigned long long size = 0;
1154 char bufpad[4096 + 4096];
1155 char *buf = (char*)(((long)bufpad + 4096) & ~4095);
1156
1157 if (lseek(dfd, 0, SEEK_SET) != 0 ||
1158 read(dfd, buf, 4096) != 4096)
1159 return 0;
1160
1161 if (buf[0] != '\0' && buf[0] != '\x5a' && buf[0] != '\xff')
1162 return 0;
1163 if (memcmp(buf, buf+1, 4095) != 0)
1164 return 0;
1165
1166 /* OK, first 4K appear blank, try the end. */
1167 get_dev_size(dfd, NULL, &size);
1168 if (lseek(dfd, size-4096, SEEK_SET) < 0 ||
1169 read(dfd, buf, 4096) != 4096)
1170 return 0;
1171
1172 if (buf[0] != '\0' && buf[0] != '\x5a' && buf[0] != '\xff')
1173 return 0;
1174 if (memcmp(buf, buf+1, 4095) != 0)
1175 return 0;
1176
1177 return 1;
1178 }
1179
1180 /* adding a spare to a regular array is quite different from adding one to
1181 * a set-of-partitions virtual array.
1182 * This function determines which is worth trying and tries as appropriate.
1183 * Arrays are given priority over partitions.
1184 */
1185 static int try_spare(char *devname, int *dfdp, struct dev_policy *pol,
1186 struct map_ent *target,
1187 struct supertype *st, int verbose)
1188 {
1189 int i;
1190 int rv;
1191 int arrays_ok = 0;
1192 int partitions_ok = 0;
1193 int dfd = *dfdp;
1194 int bare;
1195
1196 /* Can only add a spare if device has at least one domain */
1197 if (pol_find(pol, pol_domain) == NULL)
1198 return 1;
1199 /* And only if some action allows spares */
1200 if (!policy_action_allows(pol, st?st->ss->name:NULL, act_spare))
1201 return 1;
1202
1203 /* Now check if the device is bare.
1204 * bare devices can always be added as a spare
1205 * non-bare devices can only be added if spare-same-slot is permitted,
1206 * and this device is replacing a previous device - in which case 'target'
1207 * will be set.
1208 */
1209 if (!is_bare(dfd)) {
1210 /* Must have a target and allow same_slot */
1211 /* Later - may allow force_spare without target */
1212 if (!target ||
1213 !policy_action_allows(pol, st?st->ss->name:NULL,
1214 act_spare_same_slot)) {
1215 if (verbose > 1)
1216 pr_err("%s is not bare, so not "
1217 "considering as a spare\n",
1218 devname);
1219 return 1;
1220 }
1221 bare = 0;
1222 } else
1223 bare = 1;
1224
1225 /* It might be OK to add this device to an array - need to see
1226 * what arrays might be candidates.
1227 */
1228 if (st) {
1229 /* just try try 'array' or 'partition' based on this metadata */
1230 if (st->ss->add_to_super)
1231 return array_try_spare(devname, dfdp, pol, target, bare,
1232 st, verbose);
1233 else
1234 return partition_try_spare(devname, dfdp, pol,
1235 st, verbose);
1236 }
1237 /* No metadata was specified or found so options are open.
1238 * Check for whether any array metadata, or any partition metadata
1239 * might allow adding the spare. This check is just help to avoid
1240 * a more costly scan of all arrays when we can be sure that will
1241 * fail.
1242 */
1243 for (i = 0; (!arrays_ok || !partitions_ok) && superlist[i] ; i++) {
1244 if (superlist[i]->add_to_super && !arrays_ok &&
1245 policy_action_allows(pol, superlist[i]->name, act_spare))
1246 arrays_ok = 1;
1247 if (superlist[i]->add_to_super == NULL && !partitions_ok &&
1248 policy_action_allows(pol, superlist[i]->name, act_spare))
1249 partitions_ok = 1;
1250 }
1251 rv = 1;
1252 if (arrays_ok)
1253 rv = array_try_spare(devname, dfdp, pol, target, bare,
1254 st, verbose);
1255 if (rv != 0 && partitions_ok)
1256 rv = partition_try_spare(devname, dfdp, pol, st, verbose);
1257 return rv;
1258 }
1259
1260 int IncrementalScan(int verbose)
1261 {
1262 /* look at every device listed in the 'map' file.
1263 * If one is found that is not running then:
1264 * look in mdadm.conf for bitmap file.
1265 * if one exists, but array has none, add it.
1266 * try to start array in auto-readonly mode
1267 */
1268 struct map_ent *mapl = NULL;
1269 struct map_ent *me;
1270 struct mddev_ident *devs, *mddev;
1271 int rv = 0;
1272
1273 map_read(&mapl);
1274 devs = conf_get_ident(NULL);
1275
1276 for (me = mapl ; me ; me = me->next) {
1277 mdu_array_info_t array;
1278 mdu_bitmap_file_t bmf;
1279 struct mdinfo *sra;
1280 int mdfd = open_dev(me->devnum);
1281
1282 if (mdfd < 0)
1283 continue;
1284 if (ioctl(mdfd, GET_ARRAY_INFO, &array) == 0 ||
1285 errno != ENODEV) {
1286 close(mdfd);
1287 continue;
1288 }
1289 /* Ok, we can try this one. Maybe it needs a bitmap */
1290 for (mddev = devs ; mddev ; mddev = mddev->next)
1291 if (mddev->devname && me->path
1292 && devname_matches(mddev->devname, me->path))
1293 break;
1294 if (mddev && mddev->bitmap_file) {
1295 /*
1296 * Note: early kernels will wrongly fail this, so it
1297 * is a hint only
1298 */
1299 int added = -1;
1300 if (ioctl(mdfd, GET_ARRAY_INFO, &bmf) < 0) {
1301 int bmfd = open(mddev->bitmap_file, O_RDWR);
1302 if (bmfd >= 0) {
1303 added = ioctl(mdfd, SET_BITMAP_FILE,
1304 bmfd);
1305 close(bmfd);
1306 }
1307 }
1308 if (verbose >= 0) {
1309 if (added == 0)
1310 pr_err("Added bitmap %s to %s\n",
1311 mddev->bitmap_file, me->path);
1312 else if (errno != EEXIST)
1313 pr_err("Failed to add bitmap to %s: %s\n",
1314 me->path, strerror(errno));
1315 }
1316 }
1317 /* FIXME check for reshape_active and consider not
1318 * starting array.
1319 */
1320 sra = sysfs_read(mdfd, 0, 0);
1321 if (sra) {
1322 if (sysfs_set_str(sra, NULL,
1323 "array_state", "read-auto") == 0) {
1324 if (verbose >= 0)
1325 pr_err("started array %s\n",
1326 me->path ?: devnum2devname(me->devnum));
1327 } else {
1328 pr_err("failed to start array %s: %s\n",
1329 me->path ?: devnum2devname(me->devnum),
1330 strerror(errno));
1331 rv = 1;
1332 }
1333 sysfs_free(sra);
1334 }
1335 }
1336 return rv;
1337 }
1338
1339 static char *container2devname(char *devname)
1340 {
1341 char *mdname = NULL;
1342
1343 if (devname[0] == '/') {
1344 int fd = open(devname, O_RDONLY);
1345 if (fd >= 0) {
1346 mdname = devnum2devname(fd2devnum(fd));
1347 close(fd);
1348 }
1349 } else {
1350 int uuid[4];
1351 struct map_ent *mp, *map = NULL;
1352
1353 if (!parse_uuid(devname, uuid))
1354 return mdname;
1355 mp = map_by_uuid(&map, uuid);
1356 if (mp)
1357 mdname = devnum2devname(mp->devnum);
1358 map_free(map);
1359 }
1360
1361 return mdname;
1362 }
1363
1364 static int Incremental_container(struct supertype *st, char *devname,
1365 struct context *c)
1366 {
1367 /* Collect the contents of this container and for each
1368 * array, choose a device name and assemble the array.
1369 */
1370
1371 struct mdinfo *list;
1372 struct mdinfo *ra;
1373 struct map_ent *map = NULL;
1374 struct mdinfo info;
1375 int trustworthy;
1376 struct mddev_ident *match;
1377 int rv = 0;
1378 struct domainlist *domains;
1379 struct map_ent *smp;
1380 int suuid[4];
1381 int sfd;
1382 int ra_blocked = 0;
1383 int ra_all = 0;
1384
1385 st->ss->getinfo_super(st, &info, NULL);
1386
1387 if ((c->runstop > 0 && info.container_enough >= 0) ||
1388 info.container_enough > 0)
1389 /* pass */;
1390 else {
1391 if (c->verbose)
1392 pr_err("not enough devices to start the container\n");
1393 return 0;
1394 }
1395
1396 match = conf_match(st, &info, devname, c->verbose, &rv);
1397 if (match == NULL && rv == 2)
1398 return rv;
1399
1400 /* Need to compute 'trustworthy' */
1401 if (match)
1402 trustworthy = LOCAL;
1403 else if (st->ss->match_home(st, c->homehost) == 1)
1404 trustworthy = LOCAL;
1405 else if (st->ss->match_home(st, "any") == 1)
1406 trustworthy = LOCAL;
1407 else
1408 trustworthy = FOREIGN;
1409
1410 list = st->ss->container_content(st, NULL);
1411 /* when nothing to activate - quit */
1412 if (list == NULL)
1413 return 0;
1414 for (ra = list ; ra ; ra = ra->next) {
1415 int mdfd;
1416 char chosen_name[1024];
1417 struct map_ent *mp;
1418 struct mddev_ident *match = NULL;
1419
1420 ra_all++;
1421 /* do not activate arrays blocked by metadata handler */
1422 if (ra->array.state & (1 << MD_SB_BLOCK_VOLUME)) {
1423 pr_err("Cannot activate array %s in %s.\n",
1424 ra->text_version, devname);
1425 ra_blocked++;
1426 continue;
1427 }
1428 mp = map_by_uuid(&map, ra->uuid);
1429
1430 if (mp) {
1431 mdfd = open_dev(mp->devnum);
1432 if (mp->path)
1433 strcpy(chosen_name, mp->path);
1434 else
1435 strcpy(chosen_name, devnum2devname(mp->devnum));
1436 } else {
1437
1438 /* Check in mdadm.conf for container == devname and
1439 * member == ra->text_version after second slash.
1440 */
1441 char *sub = strchr(ra->text_version+1, '/');
1442 struct mddev_ident *array_list;
1443 if (sub) {
1444 sub++;
1445 array_list = conf_get_ident(NULL);
1446 } else
1447 array_list = NULL;
1448 for(; array_list ; array_list = array_list->next) {
1449 char *dn;
1450 if (array_list->member == NULL ||
1451 array_list->container == NULL)
1452 continue;
1453 if (strcmp(array_list->member, sub) != 0)
1454 continue;
1455 if (array_list->uuid_set &&
1456 !same_uuid(ra->uuid, array_list->uuid, st->ss->swapuuid))
1457 continue;
1458 dn = container2devname(array_list->container);
1459 if (dn == NULL)
1460 continue;
1461 if (strncmp(dn, ra->text_version+1,
1462 strlen(dn)) != 0 ||
1463 ra->text_version[strlen(dn)+1] != '/') {
1464 free(dn);
1465 continue;
1466 }
1467 free(dn);
1468 /* we have a match */
1469 match = array_list;
1470 if (c->verbose>0)
1471 pr_err("match found for member %s\n",
1472 array_list->member);
1473 break;
1474 }
1475
1476 if (match && match->devname &&
1477 strcasecmp(match->devname, "<ignore>") == 0) {
1478 if (c->verbose > 0)
1479 pr_err("array %s/%s is "
1480 "explicitly ignored by mdadm.conf\n",
1481 match->container, match->member);
1482 return 2;
1483 }
1484 if (match)
1485 trustworthy = LOCAL;
1486
1487 mdfd = create_mddev(match ? match->devname : NULL,
1488 ra->name,
1489 c->autof,
1490 trustworthy,
1491 chosen_name);
1492 }
1493
1494 if (mdfd < 0) {
1495 pr_err("failed to open %s: %s.\n",
1496 chosen_name, strerror(errno));
1497 return 2;
1498 }
1499
1500 assemble_container_content(st, mdfd, ra, c,
1501 chosen_name);
1502 close(mdfd);
1503 }
1504
1505 /* don't move spares to container with volume being activated
1506 when all volumes are blocked */
1507 if (ra_all == ra_blocked)
1508 return 0;
1509
1510 /* Now move all suitable spares from spare container */
1511 domains = domain_from_array(list, st->ss->name);
1512 memcpy(suuid, uuid_zero, sizeof(int[4]));
1513 if (domains &&
1514 (smp = map_by_uuid(&map, suuid)) != NULL &&
1515 (sfd = open(smp->path, O_RDONLY)) >= 0) {
1516 /* spare container found */
1517 struct supertype *sst =
1518 super_imsm.match_metadata_desc("imsm");
1519 struct mdinfo *sinfo;
1520 unsigned long long min_size = 0;
1521 if (st->ss->min_acceptable_spare_size)
1522 min_size = st->ss->min_acceptable_spare_size(st);
1523 if (!sst->ss->load_container(sst, sfd, NULL)) {
1524 close(sfd);
1525 sinfo = container_choose_spares(sst, min_size,
1526 domains, NULL,
1527 st->ss->name, 0);
1528 sst->ss->free_super(sst);
1529 if (sinfo){
1530 int count = 0;
1531 struct mdinfo *disks = sinfo->devs;
1532 while (disks) {
1533 /* move spare from spare
1534 * container to currently
1535 * assembled one
1536 */
1537 if (move_spare(
1538 smp->path,
1539 devname,
1540 makedev(disks->disk.major,
1541 disks->disk.minor)))
1542 count++;
1543 disks = disks->next;
1544 }
1545 if (count)
1546 pr_err("Added %d spare%s to %s\n",
1547 count, count>1?"s":"", devname);
1548 }
1549 sysfs_free(sinfo);
1550 } else
1551 close(sfd);
1552 }
1553 domain_free(domains);
1554 return 0;
1555 }
1556
1557 /*
1558 * IncrementalRemove - Attempt to see if the passed in device belongs to any
1559 * raid arrays, and if so first fail (if needed) and then remove the device.
1560 *
1561 * @devname - The device we want to remove
1562 * @id_path - name as found in /dev/disk/by-path for this device
1563 *
1564 * Note: the device name must be a kernel name like "sda", so
1565 * that we can find it in /proc/mdstat
1566 */
1567 int IncrementalRemove(char *devname, char *id_path, int verbose)
1568 {
1569 int mdfd;
1570 int rv;
1571 struct mdstat_ent *ent;
1572 struct mddev_dev devlist;
1573
1574 if (!id_path)
1575 dprintf(Name ": incremental removal without --path <id_path> "
1576 "lacks the possibility to re-add new device in this "
1577 "port\n");
1578
1579 if (strchr(devname, '/')) {
1580 pr_err("incremental removal requires a "
1581 "kernel device name, not a file: %s\n", devname);
1582 return 1;
1583 }
1584 ent = mdstat_by_component(devname);
1585 if (!ent) {
1586 pr_err("%s does not appear to be a component "
1587 "of any array\n", devname);
1588 return 1;
1589 }
1590 mdfd = open_dev(ent->devnum);
1591 if (mdfd < 0) {
1592 pr_err("Cannot open array %s!!\n", ent->dev);
1593 free_mdstat(ent);
1594 return 1;
1595 }
1596
1597 if (id_path) {
1598 struct map_ent *map = NULL, *me;
1599 me = map_by_devnum(&map, ent->devnum);
1600 if (me)
1601 policy_save_path(id_path, me);
1602 map_free(map);
1603 }
1604
1605 memset(&devlist, 0, sizeof(devlist));
1606 devlist.devname = devname;
1607 devlist.disposition = 'f';
1608 /* for a container, we must fail each member array */
1609 if (ent->metadata_version &&
1610 strncmp(ent->metadata_version, "external:", 9) == 0) {
1611 struct mdstat_ent *mdstat = mdstat_read(0, 0);
1612 struct mdstat_ent *memb;
1613 for (memb = mdstat ; memb ; memb = memb->next)
1614 if (is_container_member(memb, ent->dev)) {
1615 int subfd = open_dev(memb->devnum);
1616 if (subfd >= 0) {
1617 Manage_subdevs(memb->dev, subfd,
1618 &devlist, verbose, 0,
1619 NULL, 0);
1620 close(subfd);
1621 }
1622 }
1623 free_mdstat(mdstat);
1624 } else
1625 Manage_subdevs(ent->dev, mdfd, &devlist, verbose, 0, NULL, 0);
1626 devlist.disposition = 'r';
1627 rv = Manage_subdevs(ent->dev, mdfd, &devlist, verbose, 0, NULL, 0);
1628 close(mdfd);
1629 free_mdstat(ent);
1630 return rv;
1631 }
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