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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) 2006-2009 Neil Brown <neilb@suse.de>
6 *
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 *
22 * Author: Neil Brown
23 * Email: <neilb@suse.de>
24 * Paper: Neil Brown
25 * Novell Inc
26 * GPO Box Q1283
27 * QVB Post Office, NSW 1230
28 * Australia
29 */
30
31 #include "mdadm.h"
32 #include <dirent.h>
33 #include <ctype.h>
34
35 static int count_active(struct supertype *st, struct mdinfo *sra,
36 int mdfd, char **availp,
37 struct mdinfo *info);
38 static void find_reject(int mdfd, struct supertype *st, struct mdinfo *sra,
39 int number, __u64 events, int verbose,
40 char *array_name);
41 static int try_spare(char *devname, int *dfdp, struct dev_policy *pol,
42 struct map_ent *target,
43 struct supertype *st, int verbose);
44
45 static int Incremental_container(struct supertype *st, char *devname,
46 char *homehost,
47 int verbose, int runstop, int autof,
48 int freeze_reshape);
49
50 int Incremental(char *devname, int verbose, int runstop,
51 struct supertype *st, char *homehost, int require_homehost,
52 int autof, int freeze_reshape)
53 {
54 /* Add this device to an array, creating the array if necessary
55 * and starting the array if sensible or - if runstop>0 - if possible.
56 *
57 * This has several steps:
58 *
59 * 1/ Check if device is permitted by mdadm.conf, reject if not.
60 * 2/ Find metadata, reject if none appropriate (check
61 * version/name from args)
62 * 3/ Check if there is a match in mdadm.conf
63 * 3a/ if not, check for homehost match. If no match, assemble as
64 * a 'foreign' array.
65 * 4/ Determine device number.
66 * - If in mdadm.conf with std name, use that
67 * - UUID in /var/run/mdadm.map use that
68 * - If name is suggestive, use that. unless in use with different uuid.
69 * - Choose a free, high number.
70 * - Use a partitioned device unless strong suggestion not to.
71 * e.g. auto=md
72 * Don't choose partitioned for containers.
73 * 5/ Find out if array already exists
74 * 5a/ if it does not
75 * - choose a name, from mdadm.conf or 'name' field in array.
76 * - create the array
77 * - add the device
78 * 5b/ if it does
79 * - check one drive in array to make sure metadata is a reasonably
80 * close match. Reject if not (e.g. different type)
81 * - add the device
82 * 6/ Make sure /var/run/mdadm.map contains this array.
83 * 7/ Is there enough devices to possibly start the array?
84 * For a container, this means running Incremental_container.
85 * 7a/ if not, finish with success.
86 * 7b/ if yes,
87 * - read all metadata and arrange devices like -A does
88 * - if number of OK devices match expected, or -R and there are enough,
89 * start the array (auto-readonly).
90 */
91 struct stat stb;
92 struct mdinfo info, dinfo;
93 struct mdinfo *sra = NULL, *d;
94 struct mddev_ident *match;
95 char chosen_name[1024];
96 int rv = 1;
97 struct map_ent *mp, *map = NULL;
98 int dfd = -1, mdfd = -1;
99 char *avail = NULL;
100 int active_disks;
101 int trustworthy;
102 char *name_to_use;
103 mdu_array_info_t ainf;
104 struct dev_policy *policy = NULL;
105 struct map_ent target_array;
106 int have_target;
107
108 struct createinfo *ci = conf_get_create_info();
109
110 if (stat(devname, &stb) < 0) {
111 if (verbose >= 0)
112 fprintf(stderr, Name ": stat failed for %s: %s.\n",
113 devname, strerror(errno));
114 return rv;
115 }
116 if ((stb.st_mode & S_IFMT) != S_IFBLK) {
117 if (verbose >= 0)
118 fprintf(stderr, Name ": %s is not a block device.\n",
119 devname);
120 return rv;
121 }
122 dfd = dev_open(devname, O_RDONLY|O_EXCL);
123 if (dfd < 0) {
124 if (verbose >= 0)
125 fprintf(stderr, Name ": cannot open %s: %s.\n",
126 devname, strerror(errno));
127 return rv;
128 }
129 /* If the device is a container, we do something very different */
130 if (must_be_container(dfd)) {
131 if (!st)
132 st = super_by_fd(dfd, NULL);
133 if (st && st->ss->load_container)
134 rv = st->ss->load_container(st, dfd, NULL);
135
136 close(dfd);
137 if (!rv && st->ss->container_content) {
138 if (map_lock(&map))
139 fprintf(stderr, Name ": failed to get "
140 "exclusive lock on mapfile\n");
141 rv = Incremental_container(st, devname, homehost,
142 verbose, runstop, autof,
143 freeze_reshape);
144 map_unlock(&map);
145 return rv;
146 }
147
148 fprintf(stderr, Name ": %s is not part of an md array.\n",
149 devname);
150 return rv;
151 }
152
153 /* 1/ Check if device is permitted by mdadm.conf */
154
155 if (!conf_test_dev(devname)) {
156 if (verbose >= 0)
157 fprintf(stderr, Name
158 ": %s not permitted by mdadm.conf.\n",
159 devname);
160 goto out;
161 }
162
163 /* 2/ Find metadata, reject if none appropriate (check
164 * version/name from args) */
165
166 if (fstat(dfd, &stb) < 0) {
167 if (verbose >= 0)
168 fprintf(stderr, Name ": fstat failed for %s: %s.\n",
169 devname, strerror(errno));
170 goto out;
171 }
172 if ((stb.st_mode & S_IFMT) != S_IFBLK) {
173 if (verbose >= 0)
174 fprintf(stderr, Name ": %s is not a block device.\n",
175 devname);
176 goto out;
177 }
178
179 dinfo.disk.major = major(stb.st_rdev);
180 dinfo.disk.minor = minor(stb.st_rdev);
181
182 policy = disk_policy(&dinfo);
183 have_target = policy_check_path(&dinfo, &target_array);
184
185 if (st == NULL && (st = guess_super(dfd)) == NULL) {
186 if (verbose >= 0)
187 fprintf(stderr, Name
188 ": no recognisable superblock on %s.\n",
189 devname);
190 rv = try_spare(devname, &dfd, policy,
191 have_target ? &target_array : NULL,
192 st, verbose);
193 goto out;
194 }
195 if (st->ss->compare_super == NULL ||
196 st->ss->load_super(st, dfd, NULL)) {
197 if (verbose >= 0)
198 fprintf(stderr, Name ": no RAID superblock on %s.\n",
199 devname);
200 rv = try_spare(devname, &dfd, policy,
201 have_target ? &target_array : NULL,
202 st, verbose);
203 free(st);
204 goto out;
205 }
206 close (dfd); dfd = -1;
207
208 st->ss->getinfo_super(st, &info, NULL);
209
210 /* 3/ Check if there is a match in mdadm.conf */
211 match = conf_match(st, &info, devname, verbose, &rv);
212 if (!match && rv == 2)
213 goto out;
214
215 if (match && match->devname
216 && strcasecmp(match->devname, "<ignore>") == 0) {
217 if (verbose >= 0)
218 fprintf(stderr, Name ": array containing %s is explicitly"
219 " ignored by mdadm.conf\n",
220 devname);
221 goto out;
222 }
223
224 /* 3a/ if not, check for homehost match. If no match, continue
225 * but don't trust the 'name' in the array. Thus a 'random' minor
226 * number will be assigned, and the device name will be based
227 * on that. */
228 if (match)
229 trustworthy = LOCAL;
230 else if (st->ss->match_home(st, homehost) == 1)
231 trustworthy = LOCAL;
232 else if (st->ss->match_home(st, "any") == 1)
233 trustworthy = LOCAL_ANY;
234 else
235 trustworthy = FOREIGN;
236
237
238 if (!match && !conf_test_metadata(st->ss->name, policy,
239 (trustworthy == LOCAL))) {
240 if (verbose >= 1)
241 fprintf(stderr, Name
242 ": %s has metadata type %s for which "
243 "auto-assembly is disabled\n",
244 devname, st->ss->name);
245 goto out;
246 }
247 if (trustworthy == LOCAL_ANY)
248 trustworthy = LOCAL;
249
250 /* There are three possible sources for 'autof': command line,
251 * ARRAY line in mdadm.conf, or CREATE line in mdadm.conf.
252 * ARRAY takes precedence, then command line, then
253 * CREATE.
254 */
255 if (match && match->autof)
256 autof = match->autof;
257 if (autof == 0)
258 autof = ci->autof;
259
260 name_to_use = info.name;
261 if (name_to_use[0] == 0 &&
262 info.array.level == LEVEL_CONTAINER &&
263 trustworthy == LOCAL) {
264 name_to_use = info.text_version;
265 trustworthy = METADATA;
266 }
267 if (name_to_use[0] && trustworthy != LOCAL &&
268 ! require_homehost &&
269 conf_name_is_free(name_to_use))
270 trustworthy = LOCAL;
271
272 /* strip "hostname:" prefix from name if we have decided
273 * to treat it as LOCAL
274 */
275 if (trustworthy == LOCAL && strchr(name_to_use, ':') != NULL)
276 name_to_use = strchr(name_to_use, ':')+1;
277
278 /* 4/ Check if array exists.
279 */
280 if (map_lock(&map))
281 fprintf(stderr, Name ": failed to get exclusive lock on "
282 "mapfile\n");
283 mp = map_by_uuid(&map, info.uuid);
284 if (mp)
285 mdfd = open_dev(mp->devnum);
286 else
287 mdfd = -1;
288
289 if (mdfd < 0) {
290
291 /* Couldn't find an existing array, maybe make a new one */
292 mdfd = create_mddev(match ? match->devname : NULL,
293 name_to_use, autof, trustworthy, chosen_name);
294
295 if (mdfd < 0)
296 goto out_unlock;
297
298 sysfs_init(&info, mdfd, 0);
299
300 if (set_array_info(mdfd, st, &info) != 0) {
301 fprintf(stderr, Name ": failed to set array info for %s: %s\n",
302 chosen_name, strerror(errno));
303 rv = 2;
304 goto out_unlock;
305 }
306
307 dinfo = info;
308 dinfo.disk.major = major(stb.st_rdev);
309 dinfo.disk.minor = minor(stb.st_rdev);
310 if (add_disk(mdfd, st, &info, &dinfo) != 0) {
311 fprintf(stderr, Name ": failed to add %s to %s: %s.\n",
312 devname, chosen_name, strerror(errno));
313 ioctl(mdfd, STOP_ARRAY, 0);
314 rv = 2;
315 goto out_unlock;
316 }
317 sra = sysfs_read(mdfd, -1, (GET_DEVS | GET_STATE |
318 GET_OFFSET | GET_SIZE));
319
320 if (!sra || !sra->devs || sra->devs->disk.raid_disk >= 0) {
321 /* It really should be 'none' - must be old buggy
322 * kernel, and mdadm -I may not be able to complete.
323 * So reject it.
324 */
325 ioctl(mdfd, STOP_ARRAY, NULL);
326 fprintf(stderr, Name
327 ": You have an old buggy kernel which cannot support\n"
328 " --incremental reliably. Aborting.\n");
329 sysfs_free(sra);
330 rv = 2;
331 goto out_unlock;
332 }
333 info.array.working_disks = 1;
334 /* 6/ Make sure /var/run/mdadm.map contains this array. */
335 map_update(&map, fd2devnum(mdfd),
336 info.text_version,
337 info.uuid, chosen_name);
338 } else {
339 /* 5b/ if it does */
340 /* - check one drive in array to make sure metadata is a reasonably */
341 /* close match. Reject if not (e.g. different type) */
342 /* - add the device */
343 char dn[20];
344 int dfd2;
345 int err;
346 struct supertype *st2;
347 struct mdinfo info2, *d;
348
349 sra = sysfs_read(mdfd, -1, (GET_DEVS | GET_STATE |
350 GET_OFFSET | GET_SIZE));
351
352 if (mp->path)
353 strcpy(chosen_name, mp->path);
354 else
355 strcpy(chosen_name, devnum2devname(mp->devnum));
356
357 /* It is generally not OK to add non-spare drives to a
358 * running array as they are probably missing because
359 * they failed. However if runstop is 1, then the
360 * array was possibly started early and our best bet is
361 * to add this anyway.
362 * Also if action policy is re-add or better we allow
363 * re-add.
364 * This doesn't apply to containers as the 'non-spare'
365 * flag has a different meaning. The test has to happen
366 * at the device level there
367 */
368 if (!st->ss->external
369 && (info.disk.state & (1<<MD_DISK_SYNC)) != 0
370 && ! policy_action_allows(policy, st->ss->name,
371 act_re_add)
372 && runstop < 1) {
373 if (ioctl(mdfd, GET_ARRAY_INFO, &ainf) == 0) {
374 fprintf(stderr, Name
375 ": not adding %s to active array (without --run) %s\n",
376 devname, chosen_name);
377 rv = 2;
378 goto out_unlock;
379 }
380 }
381 if (!sra) {
382 rv = 2;
383 goto out_unlock;
384 }
385 if (sra->devs) {
386 sprintf(dn, "%d:%d", sra->devs->disk.major,
387 sra->devs->disk.minor);
388 dfd2 = dev_open(dn, O_RDONLY);
389 st2 = dup_super(st);
390 if (st2->ss->load_super(st2, dfd2, NULL) ||
391 st->ss->compare_super(st, st2) != 0) {
392 fprintf(stderr, Name
393 ": metadata mismatch between %s and "
394 "chosen array %s\n",
395 devname, chosen_name);
396 close(dfd2);
397 rv = 2;
398 goto out_unlock;
399 }
400 close(dfd2);
401 st2->ss->getinfo_super(st2, &info2, NULL);
402 st2->ss->free_super(st2);
403 if (info.array.level != info2.array.level ||
404 memcmp(info.uuid, info2.uuid, 16) != 0 ||
405 info.array.raid_disks != info2.array.raid_disks) {
406 fprintf(stderr, Name
407 ": unexpected difference between %s and %s.\n",
408 chosen_name, devname);
409 rv = 2;
410 goto out_unlock;
411 }
412 }
413 info2.disk.major = major(stb.st_rdev);
414 info2.disk.minor = minor(stb.st_rdev);
415 /* add disk needs to know about containers */
416 if (st->ss->external)
417 sra->array.level = LEVEL_CONTAINER;
418 err = add_disk(mdfd, st, sra, &info2);
419 if (err < 0 && errno == EBUSY) {
420 /* could be another device present with the same
421 * disk.number. Find and reject any such
422 */
423 find_reject(mdfd, st, sra, info.disk.number,
424 info.events, verbose, chosen_name);
425 err = add_disk(mdfd, st, sra, &info2);
426 }
427 if (err < 0) {
428 fprintf(stderr, Name ": failed to add %s to %s: %s.\n",
429 devname, chosen_name, strerror(errno));
430 rv = 2;
431 goto out_unlock;
432 }
433 info.array.working_disks = 0;
434 for (d = sra->devs; d; d=d->next)
435 info.array.working_disks ++;
436
437 }
438
439 /* 7/ Is there enough devices to possibly start the array? */
440 /* 7a/ if not, finish with success. */
441 if (info.array.level == LEVEL_CONTAINER) {
442 int devnum = devnum; /* defined and used iff ->external */
443 /* Try to assemble within the container */
444 if (verbose >= 0)
445 fprintf(stderr, Name
446 ": container %s now has %d devices\n",
447 chosen_name, info.array.working_disks);
448 wait_for(chosen_name, mdfd);
449 if (st->ss->external)
450 devnum = fd2devnum(mdfd);
451 if (st->ss->load_container)
452 rv = st->ss->load_container(st, mdfd, NULL);
453 close(mdfd);
454 sysfs_free(sra);
455 if (!rv)
456 rv = Incremental_container(st, chosen_name, homehost,
457 verbose, runstop, autof,
458 freeze_reshape);
459 map_unlock(&map);
460 if (rv == 1)
461 /* Don't fail the whole -I if a subarray didn't
462 * have enough devices to start yet
463 */
464 rv = 0;
465 /* after spare is added, ping monitor for external metadata
466 * so that it can eg. try to rebuild degraded array */
467 if (st->ss->external)
468 ping_monitor_by_id(devnum);
469 return rv;
470 }
471
472 /* We have added something to the array, so need to re-read the
473 * state. Eventually this state should be kept up-to-date as
474 * things change.
475 */
476 sysfs_free(sra);
477 sra = sysfs_read(mdfd, -1, (GET_DEVS | GET_STATE |
478 GET_OFFSET | GET_SIZE));
479 active_disks = count_active(st, sra, mdfd, &avail, &info);
480 if (enough(info.array.level, info.array.raid_disks,
481 info.array.layout, info.array.state & 1,
482 avail, active_disks) == 0) {
483 if (verbose >= 0)
484 fprintf(stderr, Name
485 ": %s attached to %s, not enough to start (%d).\n",
486 devname, chosen_name, active_disks);
487 rv = 0;
488 goto out_unlock;
489 }
490
491 /* 7b/ if yes, */
492 /* - if number of OK devices match expected, or -R and there */
493 /* are enough, */
494 /* + add any bitmap file */
495 /* + start the array (auto-readonly). */
496
497 if (ioctl(mdfd, GET_ARRAY_INFO, &ainf) == 0) {
498 if (verbose >= 0)
499 fprintf(stderr, Name
500 ": %s attached to %s which is already active.\n",
501 devname, chosen_name);
502 rv = 0;
503 goto out_unlock;
504 }
505
506 map_unlock(&map);
507 if (runstop > 0 || active_disks >= info.array.working_disks) {
508 struct mdinfo *dsk;
509 /* Let's try to start it */
510 if (match && match->bitmap_file) {
511 int bmfd = open(match->bitmap_file, O_RDWR);
512 if (bmfd < 0) {
513 fprintf(stderr, Name
514 ": Could not open bitmap file %s.\n",
515 match->bitmap_file);
516 goto out;
517 }
518 if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) {
519 close(bmfd);
520 fprintf(stderr, Name
521 ": Failed to set bitmapfile for %s.\n",
522 chosen_name);
523 goto out;
524 }
525 close(bmfd);
526 }
527 /* Need to remove from the array any devices which
528 * 'count_active' discerned were too old or inappropriate
529 */
530 for (d = sra ? sra->devs : NULL ; d ; d = d->next)
531 if (d->disk.state & (1<<MD_DISK_REMOVED))
532 remove_disk(mdfd, st, sra, d);
533
534 if ((sra == NULL || active_disks >= info.array.working_disks)
535 && trustworthy != FOREIGN)
536 rv = ioctl(mdfd, RUN_ARRAY, NULL);
537 else
538 rv = sysfs_set_str(sra, NULL,
539 "array_state", "read-auto");
540 if (rv == 0) {
541 if (verbose >= 0)
542 fprintf(stderr, Name
543 ": %s attached to %s, which has been started.\n",
544 devname, chosen_name);
545 rv = 0;
546 wait_for(chosen_name, mdfd);
547 /* We just started the array, so some devices
548 * might have been evicted from the array
549 * because their event counts were too old.
550 * If the action=re-add policy is in-force for
551 * those devices we should re-add them now.
552 */
553 for (dsk = sra->devs; dsk ; dsk = dsk->next) {
554 if (disk_action_allows(dsk, st->ss->name, act_re_add) &&
555 add_disk(mdfd, st, sra, dsk) == 0)
556 fprintf(stderr, Name
557 ": %s re-added to %s\n",
558 dsk->sys_name, chosen_name);
559 }
560 } else {
561 fprintf(stderr, Name
562 ": %s attached to %s, but failed to start: %s.\n",
563 devname, chosen_name, strerror(errno));
564 rv = 1;
565 }
566 } else {
567 if (verbose >= 0)
568 fprintf(stderr, Name
569 ": %s attached to %s, not enough to start safely.\n",
570 devname, chosen_name);
571 rv = 0;
572 }
573 out:
574 free(avail);
575 if (dfd >= 0)
576 close(dfd);
577 if (mdfd >= 0)
578 close(mdfd);
579 if (policy)
580 dev_policy_free(policy);
581 if (sra)
582 sysfs_free(sra);
583 return rv;
584 out_unlock:
585 map_unlock(&map);
586 goto out;
587 }
588
589 static void find_reject(int mdfd, struct supertype *st, struct mdinfo *sra,
590 int number, __u64 events, int verbose,
591 char *array_name)
592 {
593 /* Find a device attached to this array with a disk.number of number
594 * and events less than the passed events, and remove the device.
595 */
596 struct mdinfo *d;
597 mdu_array_info_t ra;
598
599 if (ioctl(mdfd, GET_ARRAY_INFO, &ra) == 0)
600 return; /* not safe to remove from active arrays
601 * without thinking more */
602
603 for (d = sra->devs; d ; d = d->next) {
604 char dn[10];
605 int dfd;
606 struct mdinfo info;
607 sprintf(dn, "%d:%d", d->disk.major, d->disk.minor);
608 dfd = dev_open(dn, O_RDONLY);
609 if (dfd < 0)
610 continue;
611 if (st->ss->load_super(st, dfd, NULL)) {
612 close(dfd);
613 continue;
614 }
615 st->ss->getinfo_super(st, &info, NULL);
616 st->ss->free_super(st);
617 close(dfd);
618
619 if (info.disk.number != number ||
620 info.events >= events)
621 continue;
622
623 if (d->disk.raid_disk > -1)
624 sysfs_set_str(sra, d, "slot", "none");
625 if (sysfs_set_str(sra, d, "state", "remove") == 0)
626 if (verbose >= 0)
627 fprintf(stderr, Name
628 ": removing old device %s from %s\n",
629 d->sys_name+4, array_name);
630 }
631 }
632
633 static int count_active(struct supertype *st, struct mdinfo *sra,
634 int mdfd, char **availp,
635 struct mdinfo *bestinfo)
636 {
637 /* count how many devices in sra think they are active */
638 struct mdinfo *d;
639 int cnt = 0;
640 __u64 max_events = 0;
641 char *avail = NULL;
642 int *best = NULL;
643 char *devmap = NULL;
644 int numdevs = 0;
645 int devnum;
646 int b, i;
647 int raid_disks = 0;
648
649 if (!sra)
650 return 0;
651
652 for (d = sra->devs ; d ; d = d->next)
653 numdevs++;
654 for (d = sra->devs, devnum=0 ; d ; d = d->next, devnum++) {
655 char dn[30];
656 int dfd;
657 int ok;
658 struct mdinfo info;
659
660 sprintf(dn, "%d:%d", d->disk.major, d->disk.minor);
661 dfd = dev_open(dn, O_RDONLY);
662 if (dfd < 0)
663 continue;
664 ok = st->ss->load_super(st, dfd, NULL);
665 close(dfd);
666 if (ok != 0)
667 continue;
668 info.array.raid_disks = raid_disks;
669 st->ss->getinfo_super(st, &info, devmap + raid_disks * devnum);
670 if (!avail) {
671 raid_disks = info.array.raid_disks;
672 avail = calloc(raid_disks, 1);
673 if (!avail) {
674 fprintf(stderr, Name ": out of memory.\n");
675 exit(1);
676 }
677 *availp = avail;
678
679 best = calloc(raid_disks, sizeof(int));
680 devmap = calloc(raid_disks * numdevs, 1);
681
682 st->ss->getinfo_super(st, &info, devmap);
683 }
684
685 if (info.disk.state & (1<<MD_DISK_SYNC))
686 {
687 if (cnt == 0) {
688 cnt++;
689 max_events = info.events;
690 avail[info.disk.raid_disk] = 2;
691 best[info.disk.raid_disk] = devnum;
692 st->ss->getinfo_super(st, bestinfo, NULL);
693 } else if (info.events == max_events) {
694 avail[info.disk.raid_disk] = 2;
695 best[info.disk.raid_disk] = devnum;
696 } else if (info.events == max_events-1) {
697 if (avail[info.disk.raid_disk] == 0) {
698 avail[info.disk.raid_disk] = 1;
699 best[info.disk.raid_disk] = devnum;
700 }
701 } else if (info.events < max_events - 1)
702 ;
703 else if (info.events == max_events+1) {
704 int i;
705 max_events = info.events;
706 for (i=0; i < raid_disks; i++)
707 if (avail[i])
708 avail[i]--;
709 avail[info.disk.raid_disk] = 2;
710 best[info.disk.raid_disk] = devnum;
711 st->ss->getinfo_super(st, bestinfo, NULL);
712 } else { /* info.events much bigger */
713 memset(avail, 0, raid_disks);
714 max_events = info.events;
715 avail[info.disk.raid_disk] = 2;
716 best[info.disk.raid_disk] = devnum;
717 st->ss->getinfo_super(st, bestinfo, NULL);
718 }
719 }
720 st->ss->free_super(st);
721 }
722 if (!avail)
723 return 0;
724 /* We need to reject any device that thinks the best device is
725 * failed or missing */
726 for (b = 0; b < raid_disks; b++)
727 if (avail[b] == 2)
728 break;
729 cnt = 0;
730 for (i = 0 ; i < raid_disks ; i++) {
731 if (i != b && avail[i])
732 if (devmap[raid_disks * best[i] + b] == 0) {
733 /* This device thinks 'b' is failed -
734 * don't use it */
735 devnum = best[i];
736 for (d=sra->devs ; devnum; d = d->next)
737 devnum--;
738 d->disk.state |= (1 << MD_DISK_REMOVED);
739 avail[i] = 0;
740 }
741 if (avail[i])
742 cnt++;
743 }
744 free(best);
745 free(devmap);
746 return cnt;
747 }
748
749 /* test if container has degraded member(s) */
750 static int container_members_max_degradation(struct map_ent *map, struct map_ent *me)
751 {
752 mdu_array_info_t array;
753 int afd;
754 int max_degraded = 0;
755
756 for(; map; map = map->next) {
757 if (!is_subarray(map->metadata) ||
758 devname2devnum(map->metadata+1) != me->devnum)
759 continue;
760 afd = open_dev(map->devnum);
761 if (afd < 0)
762 continue;
763 /* most accurate information regarding array degradation */
764 if (ioctl(afd, GET_ARRAY_INFO, &array) >= 0) {
765 int degraded = array.raid_disks - array.active_disks -
766 array.spare_disks;
767 if (degraded > max_degraded)
768 max_degraded = degraded;
769 }
770 close(afd);
771 }
772 return (max_degraded);
773 }
774
775 static int array_try_spare(char *devname, int *dfdp, struct dev_policy *pol,
776 struct map_ent *target, int bare,
777 struct supertype *st, int verbose)
778 {
779 /* This device doesn't have any md metadata
780 * The device policy allows 'spare' and if !bare, it allows spare-same-slot.
781 * If 'st' is not set, then we only know that some metadata allows this,
782 * others possibly don't.
783 * So look for a container or array to attach the device to.
784 * Prefer 'target' if that is set and the array is found.
785 *
786 * If st is set, then only arrays of that type are considered
787 * Return 0 on success, or some exit code on failure, probably 1.
788 */
789 int rv = 1;
790 struct stat stb;
791 struct map_ent *mp, *map = NULL;
792 struct mdinfo *chosen = NULL;
793 int dfd = *dfdp;
794
795 if (fstat(dfd, &stb) != 0)
796 return 1;
797
798 /*
799 * Now we need to find a suitable array to add this to.
800 * We only accept arrays that:
801 * - match 'st'
802 * - are in the same domains as the device
803 * - are of an size for which the device will be useful
804 * and we choose the one that is the most degraded
805 */
806
807 if (map_lock(&map)) {
808 fprintf(stderr, Name ": failed to get exclusive lock on "
809 "mapfile\n");
810 return 1;
811 }
812 for (mp = map ; mp ; mp = mp->next) {
813 struct supertype *st2;
814 struct domainlist *dl = NULL;
815 struct mdinfo *sra;
816 unsigned long long devsize;
817 unsigned long long component_size = 0;
818
819 if (is_subarray(mp->metadata))
820 continue;
821 if (st) {
822 st2 = st->ss->match_metadata_desc(mp->metadata);
823 if (!st2 ||
824 (st->minor_version >= 0 &&
825 st->minor_version != st2->minor_version)) {
826 if (verbose > 1)
827 fprintf(stderr, Name ": not adding %s to %s as metadata type doesn't match\n",
828 devname, mp->path);
829 free(st2);
830 continue;
831 }
832 free(st2);
833 }
834 sra = sysfs_read(-1, mp->devnum,
835 GET_DEVS|GET_OFFSET|GET_SIZE|GET_STATE|
836 GET_DEGRADED|GET_COMPONENT|GET_VERSION);
837 if (!sra) {
838 /* Probably a container - no degraded info */
839 sra = sysfs_read(-1, mp->devnum,
840 GET_DEVS|GET_OFFSET|GET_SIZE|GET_STATE|
841 GET_COMPONENT|GET_VERSION);
842 if (sra)
843 sra->array.failed_disks = -1;
844 }
845 if (!sra)
846 continue;
847 if (st == NULL) {
848 int i;
849 st2 = NULL;
850 for(i=0; !st2 && superlist[i]; i++)
851 st2 = superlist[i]->match_metadata_desc(
852 sra->text_version);
853 if (!st2) {
854 if (verbose > 1)
855 fprintf(stderr, Name ": not adding %s to %s"
856 " as metadata not recognised.\n",
857 devname, mp->path);
858 goto next;
859 }
860 /* Need to double check the 'act_spare' permissions applies
861 * to this metadata.
862 */
863 if (!policy_action_allows(pol, st2->ss->name, act_spare))
864 goto next;
865 if (!bare && !policy_action_allows(pol, st2->ss->name,
866 act_spare_same_slot))
867 goto next;
868 } else
869 st2 = st;
870 /* update number of failed disks for mostly degraded
871 * container member */
872 if (sra->array.failed_disks == -1)
873 sra->array.failed_disks = container_members_max_degradation(map, mp);
874
875 get_dev_size(dfd, NULL, &devsize);
876 if (sra->component_size == 0) {
877 /* true for containers, here we must read superblock
878 * to obtain minimum spare size */
879 struct supertype *st3 = dup_super(st2);
880 int mdfd = open_dev(mp->devnum);
881 if (!mdfd) {
882 free(st3);
883 goto next;
884 }
885 if (st3->ss->load_container &&
886 !st3->ss->load_container(st3, mdfd, mp->path)) {
887 component_size = st3->ss->min_acceptable_spare_size(st3);
888 st3->ss->free_super(st3);
889 }
890 free(st3);
891 close(mdfd);
892 }
893 if ((sra->component_size > 0 &&
894 st2->ss->avail_size(st2, devsize) < sra->component_size)
895 ||
896 (sra->component_size == 0 && devsize < component_size)) {
897 if (verbose > 1)
898 fprintf(stderr, Name ": not adding %s to %s as it is too small\n",
899 devname, mp->path);
900 goto next;
901 }
902 /* test against target.
903 * If 'target' is set and 'bare' is false, we only accept
904 * arrays/containers that match 'target'.
905 * If 'target' is set and 'bare' is true, we prefer the
906 * array which matches 'target'.
907 * target is considered only if we deal with degraded array
908 */
909 if (target && policy_action_allows(pol, st2->ss->name,
910 act_spare_same_slot)) {
911 if (strcmp(target->metadata, mp->metadata) == 0 &&
912 memcmp(target->uuid, mp->uuid,
913 sizeof(target->uuid)) == 0 &&
914 sra->array.failed_disks > 0) {
915 /* This is our target!! */
916 if (chosen)
917 sysfs_free(chosen);
918 chosen = sra;
919 sra = NULL;
920 /* skip to end so we don't check any more */
921 while (mp->next)
922 mp = mp->next;
923 goto next;
924 }
925 /* not our target */
926 if (!bare)
927 goto next;
928 }
929
930 dl = domain_from_array(sra, st2->ss->name);
931 if (domain_test(dl, pol, st2->ss->name) != 1) {
932 /* domain test fails */
933 if (verbose > 1)
934 fprintf(stderr, Name ": not adding %s to %s as"
935 " it is not in a compatible domain\n",
936 devname, mp->path);
937
938 goto next;
939 }
940 /* all tests passed, OK to add to this array */
941 if (!chosen) {
942 chosen = sra;
943 sra = NULL;
944 } else if (chosen->array.failed_disks < sra->array.failed_disks) {
945 sysfs_free(chosen);
946 chosen = sra;
947 sra = NULL;
948 }
949 next:
950 if (sra)
951 sysfs_free(sra);
952 if (st != st2)
953 free(st2);
954 if (dl)
955 domain_free(dl);
956 }
957 if (chosen) {
958 /* add current device to chosen array as a spare */
959 int mdfd = open_dev(devname2devnum(chosen->sys_name));
960 if (mdfd >= 0) {
961 struct mddev_dev devlist;
962 char devname[20];
963 devlist.next = NULL;
964 devlist.used = 0;
965 devlist.re_add = 0;
966 devlist.writemostly = 0;
967 devlist.devname = devname;
968 sprintf(devname, "%d:%d", major(stb.st_rdev),
969 minor(stb.st_rdev));
970 devlist.disposition = 'a';
971 close(dfd);
972 *dfdp = -1;
973 rv = Manage_subdevs(chosen->sys_name, mdfd, &devlist,
974 -1, 0, NULL, 0);
975 close(mdfd);
976 }
977 if (verbose > 0) {
978 if (rv == 0)
979 fprintf(stderr, Name ": added %s as spare for %s\n",
980 devname, chosen->sys_name);
981 else
982 fprintf(stderr, Name ": failed to add %s as spare for %s\n",
983 devname, chosen->sys_name);
984 }
985 sysfs_free(chosen);
986 }
987 map_unlock(&map);
988 return rv;
989 }
990
991 static int partition_try_spare(char *devname, int *dfdp, struct dev_policy *pol,
992 struct supertype *st, int verbose)
993 {
994 /* we know that at least one partition virtual-metadata is
995 * allowed to incorporate spares like this device. We need to
996 * find a suitable device to copy partition information from.
997 *
998 * Getting a list of all disk (not partition) devices is
999 * slightly non-trivial. We could look at /sys/block, but
1000 * that is theoretically due to be removed. Maybe best to use
1001 * /dev/disk/by-path/?* and ignore names ending '-partNN' as
1002 * we depend on this directory of 'path' info. But that fails
1003 * to find loop devices and probably others. Maybe don't
1004 * worry about that, they aren't the real target.
1005 *
1006 * So: check things in /dev/disk/by-path to see if they are in
1007 * a compatible domain, then load the partition table and see
1008 * if it is OK for the new device, and choose the largest
1009 * partition table that fits.
1010 */
1011 DIR *dir;
1012 struct dirent *de;
1013 char *chosen = NULL;
1014 unsigned long long chosen_size = 0;
1015 struct supertype *chosen_st = NULL;
1016 int fd;
1017
1018 dir = opendir("/dev/disk/by-path");
1019 if (!dir)
1020 return 1;
1021 while ((de = readdir(dir)) != NULL) {
1022 char *ep;
1023 struct dev_policy *pol2 = NULL;
1024 struct domainlist *domlist = NULL;
1025 int fd = -1;
1026 struct mdinfo info;
1027 struct supertype *st2 = NULL;
1028 char *devname = NULL;
1029 unsigned long long devsectors;
1030
1031 if (de->d_ino == 0 ||
1032 de->d_name[0] == '.' ||
1033 (de->d_type != DT_LNK && de->d_type != DT_UNKNOWN))
1034 goto next;
1035
1036 ep = de->d_name + strlen(de->d_name);
1037 while (ep > de->d_name &&
1038 isdigit(ep[-1]))
1039 ep--;
1040 if (ep > de->d_name + 5 &&
1041 strncmp(ep-5, "-part", 5) == 0)
1042 /* This is a partition - skip it */
1043 goto next;
1044
1045 pol2 = path_policy(de->d_name, type_disk);
1046
1047 domain_merge(&domlist, pol2, st ? st->ss->name : NULL);
1048 if (domain_test(domlist, pol, st ? st->ss->name : NULL) != 1)
1049 /* new device is incompatible with this device. */
1050 goto next;
1051
1052 domain_free(domlist);
1053 domlist = NULL;
1054
1055 if (asprintf(&devname, "/dev/disk/by-path/%s", de->d_name) != 1) {
1056 devname = NULL;
1057 goto next;
1058 }
1059 fd = open(devname, O_RDONLY);
1060 if (fd < 0)
1061 goto next;
1062 if (get_dev_size(fd, devname, &devsectors) == 0)
1063 goto next;
1064 devsectors >>= 9;
1065
1066 if (st)
1067 st2 = dup_super(st);
1068 else
1069 st2 = guess_super_type(fd, guess_partitions);
1070 if (st2 == NULL ||
1071 st2->ss->load_super(st2, fd, NULL) < 0)
1072 goto next;
1073
1074 if (!st) {
1075 /* Check domain policy again, this time referring to metadata */
1076 domain_merge(&domlist, pol2, st2->ss->name);
1077 if (domain_test(domlist, pol, st2->ss->name) != 1)
1078 /* Incompatible devices for this metadata type */
1079 goto next;
1080 if (!policy_action_allows(pol, st2->ss->name, act_spare))
1081 /* Some partition types allow sparing, but not
1082 * this one.
1083 */
1084 goto next;
1085 }
1086
1087 st2->ss->getinfo_super(st2, &info, NULL);
1088 if (info.component_size > devsectors)
1089 /* This partitioning doesn't fit in the device */
1090 goto next;
1091
1092 /* This is an acceptable device to copy partition
1093 * metadata from. We could just stop here, but I
1094 * think I want to keep looking incase a larger
1095 * metadata which makes better use of the device can
1096 * be found.
1097 */
1098 if (chosen == NULL ||
1099 chosen_size < info.component_size) {
1100 chosen_size = info.component_size;
1101 free(chosen);
1102 chosen = devname;
1103 devname = NULL;
1104 if (chosen_st) {
1105 chosen_st->ss->free_super(chosen_st);
1106 free(chosen_st);
1107 }
1108 chosen_st = st2;
1109 st2 = NULL;
1110 }
1111
1112 next:
1113 free(devname);
1114 domain_free(domlist);
1115 dev_policy_free(pol2);
1116 if (st2)
1117 st2->ss->free_super(st2);
1118 free(st2);
1119
1120 if (fd >= 0)
1121 close(fd);
1122 }
1123
1124 closedir(dir);
1125
1126 if (!chosen)
1127 return 1;
1128
1129 /* 'chosen' is the best device we can find. Let's write its
1130 * metadata to devname dfd is read-only so don't use that
1131 */
1132 fd = open(devname, O_RDWR);
1133 if (fd >= 0) {
1134 chosen_st->ss->store_super(chosen_st, fd);
1135 close(fd);
1136 }
1137 free(chosen);
1138 chosen_st->ss->free_super(chosen_st);
1139 free(chosen_st);
1140 return 0;
1141 }
1142
1143 static int is_bare(int dfd)
1144 {
1145 unsigned long long size = 0;
1146 char bufpad[4096 + 4096];
1147 char *buf = (char*)(((long)bufpad + 4096) & ~4095);
1148
1149 if (lseek(dfd, 0, SEEK_SET) != 0 ||
1150 read(dfd, buf, 4096) != 4096)
1151 return 0;
1152
1153 if (buf[0] != '\0' && buf[0] != '\x5a' && buf[0] != '\xff')
1154 return 0;
1155 if (memcmp(buf, buf+1, 4095) != 0)
1156 return 0;
1157
1158 /* OK, first 4K appear blank, try the end. */
1159 get_dev_size(dfd, NULL, &size);
1160 if (lseek(dfd, size-4096, SEEK_SET) < 0 ||
1161 read(dfd, buf, 4096) != 4096)
1162 return 0;
1163
1164 if (buf[0] != '\0' && buf[0] != '\x5a' && buf[0] != '\xff')
1165 return 0;
1166 if (memcmp(buf, buf+1, 4095) != 0)
1167 return 0;
1168
1169 return 1;
1170 }
1171
1172 /* adding a spare to a regular array is quite different from adding one to
1173 * a set-of-partitions virtual array.
1174 * This function determines which is worth trying and tries as appropriate.
1175 * Arrays are given priority over partitions.
1176 */
1177 static int try_spare(char *devname, int *dfdp, struct dev_policy *pol,
1178 struct map_ent *target,
1179 struct supertype *st, int verbose)
1180 {
1181 int i;
1182 int rv;
1183 int arrays_ok = 0;
1184 int partitions_ok = 0;
1185 int dfd = *dfdp;
1186 int bare;
1187
1188 /* Can only add a spare if device has at least one domain */
1189 if (pol_find(pol, pol_domain) == NULL)
1190 return 1;
1191 /* And only if some action allows spares */
1192 if (!policy_action_allows(pol, st?st->ss->name:NULL, act_spare))
1193 return 1;
1194
1195 /* Now check if the device is bare.
1196 * bare devices can always be added as a spare
1197 * non-bare devices can only be added if spare-same-slot is permitted,
1198 * and this device is replacing a previous device - in which case 'target'
1199 * will be set.
1200 */
1201 if (!is_bare(dfd)) {
1202 /* Must have a target and allow same_slot */
1203 /* Later - may allow force_spare without target */
1204 if (!target ||
1205 !policy_action_allows(pol, st?st->ss->name:NULL,
1206 act_spare_same_slot)) {
1207 if (verbose > 1)
1208 fprintf(stderr, Name ": %s is not bare, so not "
1209 "considering as a spare\n",
1210 devname);
1211 return 1;
1212 }
1213 bare = 0;
1214 } else
1215 bare = 1;
1216
1217 /* It might be OK to add this device to an array - need to see
1218 * what arrays might be candidates.
1219 */
1220 if (st) {
1221 /* just try try 'array' or 'partition' based on this metadata */
1222 if (st->ss->add_to_super)
1223 return array_try_spare(devname, dfdp, pol, target, bare,
1224 st, verbose);
1225 else
1226 return partition_try_spare(devname, dfdp, pol,
1227 st, verbose);
1228 }
1229 /* No metadata was specified or found so options are open.
1230 * Check for whether any array metadata, or any partition metadata
1231 * might allow adding the spare. This check is just help to avoid
1232 * a more costly scan of all arrays when we can be sure that will
1233 * fail.
1234 */
1235 for (i = 0; (!arrays_ok || !partitions_ok) && superlist[i] ; i++) {
1236 if (superlist[i]->add_to_super && !arrays_ok &&
1237 policy_action_allows(pol, superlist[i]->name, act_spare))
1238 arrays_ok = 1;
1239 if (superlist[i]->add_to_super == NULL && !partitions_ok &&
1240 policy_action_allows(pol, superlist[i]->name, act_spare))
1241 partitions_ok = 1;
1242 }
1243 rv = 1;
1244 if (arrays_ok)
1245 rv = array_try_spare(devname, dfdp, pol, target, bare,
1246 st, verbose);
1247 if (rv != 0 && partitions_ok)
1248 rv = partition_try_spare(devname, dfdp, pol, st, verbose);
1249 return rv;
1250 }
1251
1252 int IncrementalScan(int verbose)
1253 {
1254 /* look at every device listed in the 'map' file.
1255 * If one is found that is not running then:
1256 * look in mdadm.conf for bitmap file.
1257 * if one exists, but array has none, add it.
1258 * try to start array in auto-readonly mode
1259 */
1260 struct map_ent *mapl = NULL;
1261 struct map_ent *me;
1262 struct mddev_ident *devs, *mddev;
1263 int rv = 0;
1264
1265 map_read(&mapl);
1266 devs = conf_get_ident(NULL);
1267
1268 for (me = mapl ; me ; me = me->next) {
1269 mdu_array_info_t array;
1270 mdu_bitmap_file_t bmf;
1271 struct mdinfo *sra;
1272 int mdfd = open_dev(me->devnum);
1273
1274 if (mdfd < 0)
1275 continue;
1276 if (ioctl(mdfd, GET_ARRAY_INFO, &array) == 0 ||
1277 errno != ENODEV) {
1278 close(mdfd);
1279 continue;
1280 }
1281 /* Ok, we can try this one. Maybe it needs a bitmap */
1282 for (mddev = devs ; mddev ; mddev = mddev->next)
1283 if (mddev->devname && me->path
1284 && devname_matches(mddev->devname, me->path))
1285 break;
1286 if (mddev && mddev->bitmap_file) {
1287 /*
1288 * Note: early kernels will wrongly fail this, so it
1289 * is a hint only
1290 */
1291 int added = -1;
1292 if (ioctl(mdfd, GET_ARRAY_INFO, &bmf) < 0) {
1293 int bmfd = open(mddev->bitmap_file, O_RDWR);
1294 if (bmfd >= 0) {
1295 added = ioctl(mdfd, SET_BITMAP_FILE,
1296 bmfd);
1297 close(bmfd);
1298 }
1299 }
1300 if (verbose >= 0) {
1301 if (added == 0)
1302 fprintf(stderr, Name
1303 ": Added bitmap %s to %s\n",
1304 mddev->bitmap_file, me->path);
1305 else if (errno != EEXIST)
1306 fprintf(stderr, Name
1307 ": Failed to add bitmap to %s: %s\n",
1308 me->path, strerror(errno));
1309 }
1310 }
1311 sra = sysfs_read(mdfd, 0, 0);
1312 if (sra) {
1313 if (sysfs_set_str(sra, NULL,
1314 "array_state", "read-auto") == 0) {
1315 if (verbose >= 0)
1316 fprintf(stderr, Name
1317 ": started array %s\n",
1318 me->path ?: devnum2devname(me->devnum));
1319 } else {
1320 fprintf(stderr, Name
1321 ": failed to start array %s: %s\n",
1322 me->path ?: devnum2devname(me->devnum),
1323 strerror(errno));
1324 rv = 1;
1325 }
1326 }
1327 }
1328 return rv;
1329 }
1330
1331 static char *container2devname(char *devname)
1332 {
1333 char *mdname = NULL;
1334
1335 if (devname[0] == '/') {
1336 int fd = open(devname, O_RDONLY);
1337 if (fd >= 0) {
1338 mdname = devnum2devname(fd2devnum(fd));
1339 close(fd);
1340 }
1341 } else {
1342 int uuid[4];
1343 struct map_ent *mp, *map = NULL;
1344
1345 if (!parse_uuid(devname, uuid))
1346 return mdname;
1347 mp = map_by_uuid(&map, uuid);
1348 if (mp)
1349 mdname = devnum2devname(mp->devnum);
1350 map_free(map);
1351 }
1352
1353 return mdname;
1354 }
1355
1356 static int Incremental_container(struct supertype *st, char *devname,
1357 char *homehost, int verbose,
1358 int runstop, int autof, int freeze_reshape)
1359 {
1360 /* Collect the contents of this container and for each
1361 * array, choose a device name and assemble the array.
1362 */
1363
1364 struct mdinfo *list;
1365 struct mdinfo *ra;
1366 struct map_ent *map = NULL;
1367 struct mdinfo info;
1368 int trustworthy;
1369 struct mddev_ident *match;
1370 int rv = 0;
1371 struct domainlist *domains;
1372 struct map_ent *smp;
1373 int suuid[4];
1374 int sfd;
1375 int ra_blocked = 0;
1376 int ra_all = 0;
1377
1378 st->ss->getinfo_super(st, &info, NULL);
1379
1380 if ((runstop > 0 && info.container_enough >= 0) ||
1381 info.container_enough > 0)
1382 /* pass */;
1383 else {
1384 if (verbose)
1385 fprintf(stderr, Name ": not enough devices to start the container\n");
1386 return 0;
1387 }
1388
1389 match = conf_match(st, &info, devname, verbose, &rv);
1390 if (match == NULL && rv == 2)
1391 return rv;
1392
1393 /* Need to compute 'trustworthy' */
1394 if (match)
1395 trustworthy = LOCAL;
1396 else if (st->ss->match_home(st, homehost) == 1)
1397 trustworthy = LOCAL;
1398 else if (st->ss->match_home(st, "any") == 1)
1399 trustworthy = LOCAL;
1400 else
1401 trustworthy = FOREIGN;
1402
1403 list = st->ss->container_content(st, NULL);
1404 /* when nothing to activate - quit */
1405 if (list == NULL)
1406 return 0;
1407 if (map_lock(&map))
1408 fprintf(stderr, Name ": failed to get exclusive lock on "
1409 "mapfile\n");
1410 for (ra = list ; ra ; ra = ra->next) {
1411 int mdfd;
1412 char chosen_name[1024];
1413 struct map_ent *mp;
1414 struct mddev_ident *match = NULL;
1415
1416 ra_all++;
1417 /* do not activate arrays blocked by metadata handler */
1418 if (ra->array.state & (1 << MD_SB_BLOCK_VOLUME)) {
1419 fprintf(stderr, Name ": Cannot activate array %s in %s.\n",
1420 ra->text_version, devname);
1421 ra_blocked++;
1422 continue;
1423 }
1424 mp = map_by_uuid(&map, ra->uuid);
1425
1426 if (mp) {
1427 mdfd = open_dev(mp->devnum);
1428 if (mp->path)
1429 strcpy(chosen_name, mp->path);
1430 else
1431 strcpy(chosen_name, devnum2devname(mp->devnum));
1432 } else {
1433
1434 /* Check in mdadm.conf for container == devname and
1435 * member == ra->text_version after second slash.
1436 */
1437 char *sub = strchr(ra->text_version+1, '/');
1438 struct mddev_ident *array_list;
1439 if (sub) {
1440 sub++;
1441 array_list = conf_get_ident(NULL);
1442 } else
1443 array_list = NULL;
1444 for(; array_list ; array_list = array_list->next) {
1445 char *dn;
1446 if (array_list->member == NULL ||
1447 array_list->container == NULL)
1448 continue;
1449 if (strcmp(array_list->member, sub) != 0)
1450 continue;
1451 if (array_list->uuid_set &&
1452 !same_uuid(ra->uuid, array_list->uuid, st->ss->swapuuid))
1453 continue;
1454 dn = container2devname(array_list->container);
1455 if (dn == NULL)
1456 continue;
1457 if (strncmp(dn, ra->text_version+1,
1458 strlen(dn)) != 0 ||
1459 ra->text_version[strlen(dn)+1] != '/') {
1460 free(dn);
1461 continue;
1462 }
1463 free(dn);
1464 /* we have a match */
1465 match = array_list;
1466 if (verbose>0)
1467 fprintf(stderr, Name ": match found for member %s\n",
1468 array_list->member);
1469 break;
1470 }
1471
1472 if (match && match->devname &&
1473 strcasecmp(match->devname, "<ignore>") == 0) {
1474 if (verbose > 0)
1475 fprintf(stderr, Name ": array %s/%s is "
1476 "explicitly ignored by mdadm.conf\n",
1477 match->container, match->member);
1478 return 2;
1479 }
1480 if (match)
1481 trustworthy = LOCAL;
1482
1483 mdfd = create_mddev(match ? match->devname : NULL,
1484 ra->name,
1485 autof,
1486 trustworthy,
1487 chosen_name);
1488 }
1489
1490 if (mdfd < 0) {
1491 fprintf(stderr, Name ": failed to open %s: %s.\n",
1492 chosen_name, strerror(errno));
1493 return 2;
1494 }
1495
1496 assemble_container_content(st, mdfd, ra, runstop,
1497 chosen_name, verbose, NULL,
1498 freeze_reshape);
1499 close(mdfd);
1500 }
1501
1502 /* don't move spares to container with volume being activated
1503 when all volumes are blocked */
1504 if (ra_all == ra_blocked) {
1505 map_unlock(&map);
1506 return 0;
1507 }
1508
1509 /* Now move all suitable spares from spare container */
1510 domains = domain_from_array(list, st->ss->name);
1511 memcpy(suuid, uuid_zero, sizeof(int[4]));
1512 if (domains &&
1513 (smp = map_by_uuid(&map, suuid)) != NULL &&
1514 (sfd = open(smp->path, O_RDONLY)) >= 0) {
1515 /* spare container found */
1516 struct supertype *sst =
1517 super_imsm.match_metadata_desc("imsm");
1518 struct mdinfo *sinfo;
1519 unsigned long long min_size = 0;
1520 if (st->ss->min_acceptable_spare_size)
1521 min_size = st->ss->min_acceptable_spare_size(st);
1522 if (!sst->ss->load_container(sst, sfd, NULL)) {
1523 close(sfd);
1524 sinfo = container_choose_spares(sst, min_size,
1525 domains, NULL,
1526 st->ss->name, 0);
1527 sst->ss->free_super(sst);
1528 if (sinfo){
1529 int count = 0;
1530 struct mdinfo *disks = sinfo->devs;
1531 while (disks) {
1532 /* move spare from spare
1533 * container to currently
1534 * assembled one
1535 */
1536 if (move_spare(
1537 smp->path,
1538 devname,
1539 makedev(disks->disk.major,
1540 disks->disk.minor)))
1541 count++;
1542 disks = disks->next;
1543 }
1544 if (count)
1545 fprintf(stderr, Name
1546 ": 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 fprintf(stderr, Name ": 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 fprintf(stderr, Name ": %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 fprintf(stderr, Name ": 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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