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Fix RAID metadata check
[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) 2006-2013 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 <sys/wait.h>
33 #include <dirent.h>
34 #include <ctype.h>
35
36 static int count_active(struct supertype *st, struct mdinfo *sra,
37 int mdfd, char **availp,
38 struct mdinfo *info);
39 static void find_reject(int mdfd, struct supertype *st, struct mdinfo *sra,
40 int number, __u64 events, int verbose,
41 char *array_name);
42 static int try_spare(char *devname, int *dfdp, struct dev_policy *pol,
43 struct map_ent *target,
44 struct supertype *st, int verbose);
45
46 static int Incremental_container(struct supertype *st, char *devname,
47 struct context *c, char *only);
48
49 int Incremental(struct mddev_dev *devlist, struct context *c,
50 struct supertype *st)
51 {
52 /* Add this device to an array, creating the array if necessary
53 * and starting the array if sensible or - if runstop>0 - if possible.
54 *
55 * This has several steps:
56 *
57 * 1/ Check if device is permitted by mdadm.conf, reject if not.
58 * 2/ Find metadata, reject if none appropriate (check
59 * version/name from args)
60 * 3/ Check if there is a match in mdadm.conf
61 * 3a/ if not, check for homehost match. If no match, assemble as
62 * a 'foreign' array.
63 * 4/ Determine device number.
64 * - If in mdadm.conf with std name, use that
65 * - UUID in /var/run/mdadm.map use that
66 * - If name is suggestive, use that. unless in use with different uuid.
67 * - Choose a free, high number.
68 * - Use a partitioned device unless strong suggestion not to.
69 * e.g. auto=md
70 * Don't choose partitioned for containers.
71 * 5/ Find out if array already exists
72 * 5a/ if it does not
73 * - choose a name, from mdadm.conf or 'name' field in array.
74 * - create the array
75 * - add the device
76 * 5b/ if it does
77 * - check one drive in array to make sure metadata is a reasonably
78 * close match. Reject if not (e.g. different type)
79 * - add the device
80 * 6/ Make sure /var/run/mdadm.map contains this array.
81 * 7/ Is there enough devices to possibly start the array?
82 * For a container, this means running Incremental_container.
83 * 7a/ if not, finish with success.
84 * 7b/ if yes,
85 * - read all metadata and arrange devices like -A does
86 * - if number of OK devices match expected, or -R and there are enough,
87 * start the array (auto-readonly).
88 */
89 struct stat stb;
90 struct mdinfo info, dinfo;
91 struct mdinfo *sra = NULL, *d;
92 struct mddev_ident *match;
93 char chosen_name[1024];
94 char *md_devname;
95 int rv = 1;
96 struct map_ent *mp, *map = NULL;
97 int dfd = -1, mdfd = -1;
98 char *avail = NULL;
99 int active_disks;
100 int trustworthy;
101 char *name_to_use;
102 mdu_array_info_t ainf;
103 struct dev_policy *policy = NULL;
104 struct map_ent target_array;
105 int have_target;
106 char *devname = devlist->devname;
107 int journal_device_missing = 0;
108
109 struct createinfo *ci = conf_get_create_info();
110
111 if (stat(devname, &stb) < 0) {
112 if (c->verbose >= 0)
113 pr_err("stat failed for %s: %s.\n",
114 devname, strerror(errno));
115 return rv;
116 }
117 if ((stb.st_mode & S_IFMT) != S_IFBLK) {
118 if (c->verbose >= 0)
119 pr_err("%s is not a block device.\n",
120 devname);
121 return rv;
122 }
123 dfd = dev_open(devname, O_RDONLY);
124 if (dfd < 0) {
125 if (c->verbose >= 0)
126 pr_err("cannot open %s: %s.\n",
127 devname, strerror(errno));
128 return rv;
129 }
130 /* If the device is a container, we do something very different */
131 if (must_be_container(dfd)) {
132 if (!st)
133 st = super_by_fd(dfd, NULL);
134 if (st && st->ss->load_container)
135 rv = st->ss->load_container(st, dfd, NULL);
136
137 close(dfd);
138 if (!rv && st->ss->container_content) {
139 if (map_lock(&map))
140 pr_err("failed to get exclusive lock on mapfile\n");
141 if (c->export)
142 printf("MD_DEVNAME=%s\n", devname);
143 rv = Incremental_container(st, devname, c, NULL);
144 map_unlock(&map);
145 return rv;
146 }
147
148 pr_err("%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 for (;devlist; devlist = devlist->next)
156 if (conf_test_dev(devlist->devname))
157 break;
158 if (!devlist) {
159 devlist = conf_get_devs();
160 for (;devlist; devlist = devlist->next) {
161 struct stat st2;
162 if (stat(devlist->devname, &st2) == 0 &&
163 (st2.st_mode & S_IFMT) == S_IFBLK &&
164 st2.st_rdev == stb.st_rdev)
165 break;
166 }
167 }
168 if (!devlist) {
169 if (c->verbose >= 0)
170 pr_err("%s not permitted by mdadm.conf.\n",
171 devname);
172 goto out;
173 }
174
175 /* 2/ Find metadata, reject if none appropriate (check
176 * version/name from args) */
177
178 if (fstat(dfd, &stb) < 0) {
179 if (c->verbose >= 0)
180 pr_err("fstat failed for %s: %s.\n",
181 devname, strerror(errno));
182 goto out;
183 }
184 if ((stb.st_mode & S_IFMT) != S_IFBLK) {
185 if (c->verbose >= 0)
186 pr_err("%s is not a block device.\n",
187 devname);
188 goto out;
189 }
190
191 dinfo.disk.major = major(stb.st_rdev);
192 dinfo.disk.minor = minor(stb.st_rdev);
193
194 policy = disk_policy(&dinfo);
195 have_target = policy_check_path(&dinfo, &target_array);
196
197 if (st == NULL && (st = guess_super_type(dfd, guess_array)) == NULL) {
198 if (c->verbose >= 0)
199 pr_err("no recognisable superblock on %s.\n",
200 devname);
201 rv = try_spare(devname, &dfd, policy,
202 have_target ? &target_array : NULL,
203 NULL, c->verbose);
204 goto out;
205 }
206 st->ignore_hw_compat = 0;
207
208 if (st->ss->compare_super == NULL ||
209 st->ss->load_super(st, dfd, c->verbose >= 0 ? devname : NULL)) {
210 if (c->verbose >= 0)
211 pr_err("no RAID superblock on %s.\n",
212 devname);
213 rv = try_spare(devname, &dfd, policy,
214 have_target ? &target_array : NULL,
215 st, c->verbose);
216 free(st);
217 goto out;
218 }
219 close (dfd); dfd = -1;
220
221 st->ss->getinfo_super(st, &info, NULL);
222
223 /* 3/ Check if there is a match in mdadm.conf */
224 match = conf_match(st, &info, devname, c->verbose, &rv);
225 if (!match && rv == 2)
226 goto out;
227
228 if (match && match->devname
229 && strcasecmp(match->devname, "<ignore>") == 0) {
230 if (c->verbose >= 0)
231 pr_err("array containing %s is explicitly ignored by mdadm.conf\n",
232 devname);
233 goto out;
234 }
235
236 /* 3a/ if not, check for homehost match. If no match, continue
237 * but don't trust the 'name' in the array. Thus a 'random' minor
238 * number will be assigned, and the device name will be based
239 * on that. */
240 if (match)
241 trustworthy = LOCAL;
242 else if (st->ss->match_home(st, c->homehost) == 1)
243 trustworthy = LOCAL;
244 else if (st->ss->match_home(st, "any") == 1)
245 trustworthy = LOCAL_ANY;
246 else
247 trustworthy = FOREIGN;
248
249 if (!match && !conf_test_metadata(st->ss->name, policy,
250 (trustworthy == LOCAL))) {
251 if (c->verbose >= 1)
252 pr_err("%s has metadata type %s for which auto-assembly is disabled\n",
253 devname, st->ss->name);
254 goto out;
255 }
256 if (trustworthy == LOCAL_ANY)
257 trustworthy = LOCAL;
258
259 /* There are three possible sources for 'autof': command line,
260 * ARRAY line in mdadm.conf, or CREATE line in mdadm.conf.
261 * ARRAY takes precedence, then command line, then
262 * CREATE.
263 */
264 if (match && match->autof)
265 c->autof = match->autof;
266 if (c->autof == 0)
267 c->autof = ci->autof;
268
269 name_to_use = info.name;
270 if (name_to_use[0] == 0 &&
271 info.array.level == LEVEL_CONTAINER) {
272 name_to_use = info.text_version;
273 trustworthy = METADATA;
274 }
275 if (name_to_use[0] && trustworthy != LOCAL &&
276 ! c->require_homehost &&
277 conf_name_is_free(name_to_use))
278 trustworthy = LOCAL;
279
280 /* strip "hostname:" prefix from name if we have decided
281 * to treat it as LOCAL
282 */
283 if (trustworthy == LOCAL && strchr(name_to_use, ':') != NULL)
284 name_to_use = strchr(name_to_use, ':')+1;
285
286 /* 4/ Check if array exists.
287 */
288 if (map_lock(&map))
289 pr_err("failed to get exclusive lock on mapfile\n");
290 /* Now check we can get O_EXCL. If not, probably "mdadm -A" has
291 * taken over
292 */
293 dfd = dev_open(devname, O_RDONLY|O_EXCL);
294 if (dfd < 0) {
295 if (c->verbose >= 0)
296 pr_err("cannot reopen %s: %s.\n",
297 devname, strerror(errno));
298 goto out_unlock;
299 }
300 /* Cannot hold it open while we add the device to the array,
301 * so we must release the O_EXCL and depend on the map_lock()
302 * So now is the best time to remove any partitions.
303 */
304 remove_partitions(dfd);
305 close(dfd);
306 dfd = -1;
307
308 mp = map_by_uuid(&map, info.uuid);
309 if (mp)
310 mdfd = open_dev(mp->devnm);
311 else
312 mdfd = -1;
313
314 if (mdfd < 0) {
315
316 /* Skip the clustered ones. This should be started by
317 * clustering resource agents
318 */
319 if (info.array.state & (1 << MD_SB_CLUSTERED))
320 goto out;
321
322 /* Couldn't find an existing array, maybe make a new one */
323 mdfd = create_mddev(match ? match->devname : NULL,
324 name_to_use, c->autof, trustworthy, chosen_name);
325
326 if (mdfd < 0)
327 goto out_unlock;
328
329 sysfs_init(&info, mdfd, NULL);
330
331 if (set_array_info(mdfd, st, &info) != 0) {
332 pr_err("failed to set array info for %s: %s\n",
333 chosen_name, strerror(errno));
334 rv = 2;
335 goto out_unlock;
336 }
337
338 dinfo = info;
339 dinfo.disk.major = major(stb.st_rdev);
340 dinfo.disk.minor = minor(stb.st_rdev);
341 if (add_disk(mdfd, st, &info, &dinfo) != 0) {
342 pr_err("failed to add %s to new array %s: %s.\n",
343 devname, chosen_name, strerror(errno));
344 ioctl(mdfd, STOP_ARRAY, 0);
345 rv = 2;
346 goto out_unlock;
347 }
348 sra = sysfs_read(mdfd, NULL, (GET_DEVS | GET_STATE |
349 GET_OFFSET | GET_SIZE));
350
351 if (!sra || !sra->devs || sra->devs->disk.raid_disk >= 0) {
352 /* It really should be 'none' - must be old buggy
353 * kernel, and mdadm -I may not be able to complete.
354 * So reject it.
355 */
356 ioctl(mdfd, STOP_ARRAY, NULL);
357 pr_err("You have an old buggy kernel which cannot support\n --incremental reliably. Aborting.\n");
358 rv = 2;
359 goto out_unlock;
360 }
361 info.array.working_disks = 1;
362 /* 6/ Make sure /var/run/mdadm.map contains this array. */
363 map_update(&map, fd2devnm(mdfd),
364 info.text_version,
365 info.uuid, chosen_name);
366 } else {
367 /* 5b/ if it does */
368 /* - check one drive in array to make sure metadata is a reasonably */
369 /* close match. Reject if not (e.g. different type) */
370 /* - add the device */
371 char dn[20];
372 int dfd2;
373 int err;
374 struct supertype *st2;
375 struct mdinfo info2, *d;
376
377 sra = sysfs_read(mdfd, NULL, (GET_DEVS | GET_STATE |
378 GET_OFFSET | GET_SIZE));
379
380 if (mp->path)
381 strcpy(chosen_name, mp->path);
382 else
383 strcpy(chosen_name, mp->devnm);
384
385 /* It is generally not OK to add non-spare drives to a
386 * running array as they are probably missing because
387 * they failed. However if runstop is 1, then the
388 * array was possibly started early and our best bet is
389 * to add this anyway.
390 * Also if action policy is re-add or better we allow
391 * re-add.
392 * This doesn't apply to containers as the 'non-spare'
393 * flag has a different meaning. The test has to happen
394 * at the device level there
395 */
396 if (!st->ss->external
397 && (info.disk.state & (1<<MD_DISK_SYNC)) != 0
398 && ! policy_action_allows(policy, st->ss->name,
399 act_re_add)
400 && c->runstop < 1) {
401 if (ioctl(mdfd, GET_ARRAY_INFO, &ainf) == 0) {
402 pr_err("not adding %s to active array (without --run) %s\n",
403 devname, chosen_name);
404 rv = 2;
405 goto out_unlock;
406 }
407 }
408 if (!sra) {
409 rv = 2;
410 goto out_unlock;
411 }
412 if (sra->devs) {
413 sprintf(dn, "%d:%d", sra->devs->disk.major,
414 sra->devs->disk.minor);
415 dfd2 = dev_open(dn, O_RDONLY);
416 if (dfd2 < 0) {
417 pr_err("unable to open %s\n", devname);
418 rv = 2;
419 goto out_unlock;
420 }
421 st2 = dup_super(st);
422 if (st2->ss->load_super(st2, dfd2, NULL) ||
423 st->ss->compare_super(st, st2) != 0) {
424 pr_err("metadata mismatch between %s and chosen array %s\n",
425 devname, chosen_name);
426 close(dfd2);
427 rv = 2;
428 goto out_unlock;
429 }
430 close(dfd2);
431 st2->ss->getinfo_super(st2, &info2, NULL);
432 st2->ss->free_super(st2);
433 if (info.array.level != info2.array.level ||
434 memcmp(info.uuid, info2.uuid, 16) != 0 ||
435 info.array.raid_disks != info2.array.raid_disks) {
436 pr_err("unexpected difference between %s and %s.\n",
437 chosen_name, devname);
438 rv = 2;
439 goto out_unlock;
440 }
441 }
442 info.disk.major = major(stb.st_rdev);
443 info.disk.minor = minor(stb.st_rdev);
444 /* add disk needs to know about containers */
445 if (st->ss->external)
446 sra->array.level = LEVEL_CONTAINER;
447
448 if (info.array.state & (1 << MD_SB_CLUSTERED))
449 info.disk.state |= (1 << MD_DISK_CLUSTER_ADD);
450
451 err = add_disk(mdfd, st, sra, &info);
452 if (err < 0 && errno == EBUSY) {
453 /* could be another device present with the same
454 * disk.number. Find and reject any such
455 */
456 find_reject(mdfd, st, sra, info.disk.number,
457 info.events, c->verbose, chosen_name);
458 err = add_disk(mdfd, st, sra, &info);
459 }
460 if (err < 0 && errno == EINVAL &&
461 info.disk.state & (1<<MD_DISK_SYNC)) {
462 /* Maybe it needs to be added as a spare */
463 if (policy_action_allows(policy, st->ss->name,
464 act_force_spare)) {
465 info.disk.state &= ~(1<<MD_DISK_SYNC);
466 err = add_disk(mdfd, st, sra, &info);
467 } else
468 if (c->verbose >= 0)
469 pr_err("can only add %s to %s as a spare, and force-spare is not set.\n",
470 devname, chosen_name);
471 }
472 if (err < 0) {
473 pr_err("failed to add %s to existing array %s: %s.\n",
474 devname, chosen_name, strerror(errno));
475 rv = 2;
476 goto out_unlock;
477 }
478 info.array.working_disks = 0;
479 for (d = sra->devs; d; d=d->next)
480 info.array.working_disks ++;
481
482 }
483 if (strncmp(chosen_name, "/dev/md/", 8) == 0)
484 md_devname = chosen_name+8;
485 else
486 md_devname = chosen_name;
487 if (c->export) {
488 printf("MD_DEVICE=%s\n", fd2devnm(mdfd));
489 printf("MD_DEVNAME=%s\n", md_devname);
490 printf("MD_FOREIGN=%s\n", trustworthy == FOREIGN ? "yes" : "no");
491 }
492
493 /* 7/ Is there enough devices to possibly start the array? */
494 /* 7a/ if not, finish with success. */
495 if (info.array.level == LEVEL_CONTAINER) {
496 char devnm[32];
497 /* Try to assemble within the container */
498 sysfs_uevent(sra, "change");
499 if (!c->export && c->verbose >= 0)
500 pr_err("container %s now has %d device%s\n",
501 chosen_name, info.array.working_disks,
502 info.array.working_disks == 1?"":"s");
503 wait_for(chosen_name, mdfd);
504 if (st->ss->external)
505 strcpy(devnm, fd2devnm(mdfd));
506 if (st->ss->load_container)
507 rv = st->ss->load_container(st, mdfd, NULL);
508 close(mdfd);
509 sysfs_free(sra);
510 if (!rv)
511 rv = Incremental_container(st, chosen_name, c, NULL);
512 map_unlock(&map);
513 /* after spare is added, ping monitor for external metadata
514 * so that it can eg. try to rebuild degraded array */
515 if (st->ss->external)
516 ping_monitor(devnm);
517 return rv;
518 }
519
520 /* We have added something to the array, so need to re-read the
521 * state. Eventually this state should be kept up-to-date as
522 * things change.
523 */
524 sysfs_free(sra);
525 sra = sysfs_read(mdfd, NULL, (GET_DEVS | GET_STATE |
526 GET_OFFSET | GET_SIZE));
527 active_disks = count_active(st, sra, mdfd, &avail, &info);
528
529 journal_device_missing = (info.journal_device_required) && (info.journal_clean == 0);
530
531 if (enough(info.array.level, info.array.raid_disks,
532 info.array.layout, info.array.state & 1,
533 avail) == 0) {
534 if (c->export) {
535 printf("MD_STARTED=no\n");
536 } else if (c->verbose >= 0)
537 pr_err("%s attached to %s, not enough to start (%d).\n",
538 devname, chosen_name, active_disks);
539 rv = 0;
540 goto out_unlock;
541 }
542
543 /* 7b/ if yes, */
544 /* - if number of OK devices match expected, or -R and there */
545 /* are enough, */
546 /* + add any bitmap file */
547 /* + start the array (auto-readonly). */
548
549 if (ioctl(mdfd, GET_ARRAY_INFO, &ainf) == 0) {
550 if (c->export) {
551 printf("MD_STARTED=already\n");
552 } else if (c->verbose >= 0)
553 pr_err("%s attached to %s which is already active.\n",
554 devname, chosen_name);
555 rv = 0;
556 goto out_unlock;
557 }
558
559 map_unlock(&map);
560 if (c->runstop > 0 || (!journal_device_missing && active_disks >= info.array.working_disks)) {
561 struct mdinfo *dsk;
562 /* Let's try to start it */
563
564 if (journal_device_missing)
565 pr_err("Trying to run with missing journal device\n");
566 if (info.reshape_active && !(info.reshape_active & RESHAPE_NO_BACKUP)) {
567 pr_err("%s: This array is being reshaped and cannot be started\n",
568 chosen_name);
569 cont_err("by --incremental. Please use --assemble\n");
570 goto out;
571 }
572 if (match && match->bitmap_file) {
573 int bmfd = open(match->bitmap_file, O_RDWR);
574 if (bmfd < 0) {
575 pr_err("Could not open bitmap file %s.\n",
576 match->bitmap_file);
577 goto out;
578 }
579 if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) {
580 close(bmfd);
581 pr_err("Failed to set bitmapfile for %s.\n",
582 chosen_name);
583 goto out;
584 }
585 close(bmfd);
586 }
587 /* Need to remove from the array any devices which
588 * 'count_active' discerned were too old or inappropriate
589 */
590 for (d = sra ? sra->devs : NULL ; d ; d = d->next)
591 if (d->disk.state & (1<<MD_DISK_REMOVED))
592 remove_disk(mdfd, st, sra, d);
593
594 if ((sra == NULL || active_disks >= info.array.working_disks)
595 && trustworthy != FOREIGN)
596 rv = ioctl(mdfd, RUN_ARRAY, NULL);
597 else
598 rv = sysfs_set_str(sra, NULL,
599 "array_state", "read-auto");
600 /* Array might be O_EXCL which will interfere with
601 * fsck and mount. So re-open without O_EXCL.
602 */
603 reopen_mddev(mdfd);
604 if (rv == 0) {
605 if (c->export) {
606 printf("MD_STARTED=yes\n");
607 } else if (c->verbose >= 0)
608 pr_err("%s attached to %s, which has been started.\n",
609 devname, chosen_name);
610 rv = 0;
611 wait_for(chosen_name, mdfd);
612 /* We just started the array, so some devices
613 * might have been evicted from the array
614 * because their event counts were too old.
615 * If the action=re-add policy is in-force for
616 * those devices we should re-add them now.
617 */
618 for (dsk = sra->devs; dsk ; dsk = dsk->next) {
619 if (disk_action_allows(dsk, st->ss->name, act_re_add) &&
620 add_disk(mdfd, st, sra, dsk) == 0)
621 pr_err("%s re-added to %s\n",
622 dsk->sys_name, chosen_name);
623 }
624 } else {
625 pr_err("%s attached to %s, but failed to start: %s.\n",
626 devname, chosen_name, strerror(errno));
627 rv = 1;
628 }
629 } else {
630 if (c->export) {
631 printf("MD_STARTED=unsafe\n");
632 } else if (journal_device_missing) {
633 pr_err("Journal device is missing, not safe to start yet.\n");
634 } else if (c->verbose >= 0)
635 pr_err("%s attached to %s, not enough to start safely.\n",
636 devname, chosen_name);
637 rv = 0;
638 }
639 out:
640 free(avail);
641 if (dfd >= 0)
642 close(dfd);
643 if (mdfd >= 0)
644 close(mdfd);
645 if (policy)
646 dev_policy_free(policy);
647 sysfs_free(sra);
648 return rv;
649 out_unlock:
650 map_unlock(&map);
651 goto out;
652 }
653
654 static void find_reject(int mdfd, struct supertype *st, struct mdinfo *sra,
655 int number, __u64 events, int verbose,
656 char *array_name)
657 {
658 /* Find a device attached to this array with a disk.number of number
659 * and events less than the passed events, and remove the device.
660 */
661 struct mdinfo *d;
662 mdu_array_info_t ra;
663
664 if (ioctl(mdfd, GET_ARRAY_INFO, &ra) == 0)
665 return; /* not safe to remove from active arrays
666 * without thinking more */
667
668 for (d = sra->devs; d ; d = d->next) {
669 char dn[24]; // 2*11 bytes for ints (including sign) + colon + null byte
670 int dfd;
671 struct mdinfo info;
672 sprintf(dn, "%d:%d", d->disk.major, d->disk.minor);
673 dfd = dev_open(dn, O_RDONLY);
674 if (dfd < 0)
675 continue;
676 if (st->ss->load_super(st, dfd, NULL)) {
677 close(dfd);
678 continue;
679 }
680 st->ss->getinfo_super(st, &info, NULL);
681 st->ss->free_super(st);
682 close(dfd);
683
684 if (info.disk.number != number ||
685 info.events >= events)
686 continue;
687
688 if (d->disk.raid_disk > -1)
689 sysfs_set_str(sra, d, "slot", "none");
690 if (sysfs_set_str(sra, d, "state", "remove") == 0)
691 if (verbose >= 0)
692 pr_err("removing old device %s from %s\n",
693 d->sys_name+4, array_name);
694 }
695 }
696
697 static int count_active(struct supertype *st, struct mdinfo *sra,
698 int mdfd, char **availp,
699 struct mdinfo *bestinfo)
700 {
701 /* count how many devices in sra think they are active */
702 struct mdinfo *d;
703 int cnt = 0;
704 int replcnt = 0;
705 __u64 max_events = 0;
706 char *avail = NULL;
707 int *best = NULL;
708 char *devmap = NULL;
709 int numdevs = 0;
710 int devnum;
711 int b, i;
712 int raid_disks = 0;
713
714 if (!sra)
715 return 0;
716
717 for (d = sra->devs ; d ; d = d->next)
718 numdevs++;
719 for (d = sra->devs, devnum = 0 ; d ; d = d->next, devnum++) {
720 char dn[30];
721 int dfd;
722 int ok;
723 struct mdinfo info;
724
725 sprintf(dn, "%d:%d", d->disk.major, d->disk.minor);
726 dfd = dev_open(dn, O_RDONLY);
727 if (dfd < 0)
728 continue;
729 ok = st->ss->load_super(st, dfd, NULL);
730 close(dfd);
731 if (ok != 0)
732 continue;
733
734 info.array.raid_disks = raid_disks;
735 st->ss->getinfo_super(st, &info, devmap + raid_disks * devnum);
736 if (info.disk.raid_disk == MD_DISK_ROLE_JOURNAL)
737 bestinfo->journal_clean = 1;
738 if (!avail) {
739 raid_disks = info.array.raid_disks;
740 avail = xcalloc(raid_disks, 1);
741 *availp = avail;
742
743 best = xcalloc(raid_disks, sizeof(int));
744 devmap = xcalloc(raid_disks, numdevs);
745
746 st->ss->getinfo_super(st, &info, devmap);
747 }
748
749 if (info.disk.state & (1<<MD_DISK_SYNC))
750 {
751 if (cnt == 0) {
752 cnt++;
753 max_events = info.events;
754 avail[info.disk.raid_disk] = 2;
755 best[info.disk.raid_disk] = devnum;
756 st->ss->getinfo_super(st, bestinfo, NULL);
757 } else if (info.events == max_events) {
758 avail[info.disk.raid_disk] = 2;
759 best[info.disk.raid_disk] = devnum;
760 } else if (info.events == max_events-1) {
761 if (avail[info.disk.raid_disk] == 0) {
762 avail[info.disk.raid_disk] = 1;
763 best[info.disk.raid_disk] = devnum;
764 }
765 } else if (info.events < max_events - 1)
766 ;
767 else if (info.events == max_events+1) {
768 int i;
769 max_events = info.events;
770 for (i = 0; i < raid_disks; i++)
771 if (avail[i])
772 avail[i]--;
773 avail[info.disk.raid_disk] = 2;
774 best[info.disk.raid_disk] = devnum;
775 st->ss->getinfo_super(st, bestinfo, NULL);
776 } else { /* info.events much bigger */
777 memset(avail, 0, raid_disks);
778 max_events = info.events;
779 avail[info.disk.raid_disk] = 2;
780 best[info.disk.raid_disk] = devnum;
781 st->ss->getinfo_super(st, bestinfo, NULL);
782 }
783 } else if (info.disk.state & (1<<MD_DISK_REPLACEMENT))
784 replcnt++;
785 st->ss->free_super(st);
786 }
787
788 if (!avail)
789 return 0;
790 /* We need to reject any device that thinks the best device is
791 * failed or missing */
792 for (b = 0; b < raid_disks; b++)
793 if (avail[b] == 2)
794 break;
795 cnt = 0;
796 for (i = 0 ; i < raid_disks ; i++) {
797 if (i != b && avail[i])
798 if (devmap[raid_disks * best[i] + b] == 0) {
799 /* This device thinks 'b' is failed -
800 * don't use it */
801 devnum = best[i];
802 for (d=sra->devs ; devnum; d = d->next)
803 devnum--;
804 d->disk.state |= (1 << MD_DISK_REMOVED);
805 avail[i] = 0;
806 }
807 if (avail[i])
808 cnt++;
809 }
810 /* Also need to reject any spare device with an event count that
811 * is too high
812 */
813 for (d = sra->devs; d; d = d->next) {
814 if (!(d->disk.state & (1<<MD_DISK_SYNC)) &&
815 d->events > max_events)
816 d->disk.state |= (1 << MD_DISK_REMOVED);
817 }
818 free(best);
819 free(devmap);
820 return cnt + replcnt;
821 }
822
823 /* test if container has degraded member(s) */
824 static int container_members_max_degradation(struct map_ent *map, struct map_ent *me)
825 {
826 mdu_array_info_t array;
827 int afd;
828 int max_degraded = 0;
829
830 for(; map; map = map->next) {
831 if (!metadata_container_matches(map->metadata, me->devnm))
832 continue;
833 afd = open_dev(map->devnm);
834 if (afd < 0)
835 continue;
836 /* most accurate information regarding array degradation */
837 if (ioctl(afd, GET_ARRAY_INFO, &array) >= 0) {
838 int degraded = array.raid_disks - array.active_disks -
839 array.spare_disks;
840 if (degraded > max_degraded)
841 max_degraded = degraded;
842 }
843 close(afd);
844 }
845 return (max_degraded);
846 }
847
848 static int array_try_spare(char *devname, int *dfdp, struct dev_policy *pol,
849 struct map_ent *target, int bare,
850 struct supertype *st, int verbose)
851 {
852 /* This device doesn't have any md metadata
853 * The device policy allows 'spare' and if !bare, it allows spare-same-slot.
854 * If 'st' is not set, then we only know that some metadata allows this,
855 * others possibly don't.
856 * So look for a container or array to attach the device to.
857 * Prefer 'target' if that is set and the array is found.
858 *
859 * If st is set, then only arrays of that type are considered
860 * Return 0 on success, or some exit code on failure, probably 1.
861 */
862 int rv = 1;
863 struct stat stb;
864 struct map_ent *mp, *map = NULL;
865 struct mdinfo *chosen = NULL;
866 int dfd = *dfdp;
867
868 if (fstat(dfd, &stb) != 0)
869 return 1;
870
871 /*
872 * Now we need to find a suitable array to add this to.
873 * We only accept arrays that:
874 * - match 'st'
875 * - are in the same domains as the device
876 * - are of an size for which the device will be useful
877 * and we choose the one that is the most degraded
878 */
879
880 if (map_lock(&map)) {
881 pr_err("failed to get exclusive lock on mapfile\n");
882 return 1;
883 }
884 for (mp = map ; mp ; mp = mp->next) {
885 struct supertype *st2;
886 struct domainlist *dl = NULL;
887 struct mdinfo *sra;
888 unsigned long long devsize;
889 unsigned long long component_size = 0;
890
891 if (is_subarray(mp->metadata))
892 continue;
893 if (st) {
894 st2 = st->ss->match_metadata_desc(mp->metadata);
895 if (!st2 ||
896 (st->minor_version >= 0 &&
897 st->minor_version != st2->minor_version)) {
898 if (verbose > 1)
899 pr_err("not adding %s to %s as metadata type doesn't match\n",
900 devname, mp->path);
901 free(st2);
902 continue;
903 }
904 free(st2);
905 }
906 sra = sysfs_read(-1, mp->devnm,
907 GET_DEVS|GET_OFFSET|GET_SIZE|GET_STATE|
908 GET_DEGRADED|GET_COMPONENT|GET_VERSION);
909 if (!sra) {
910 /* Probably a container - no degraded info */
911 sra = sysfs_read(-1, mp->devnm,
912 GET_DEVS|GET_OFFSET|GET_SIZE|GET_STATE|
913 GET_COMPONENT|GET_VERSION);
914 if (sra)
915 sra->array.failed_disks = -1;
916 }
917 if (!sra)
918 continue;
919 if (st == NULL) {
920 int i;
921 st2 = NULL;
922 for(i = 0; !st2 && superlist[i]; i++)
923 st2 = superlist[i]->match_metadata_desc(
924 sra->text_version);
925 if (!st2) {
926 if (verbose > 1)
927 pr_err("not adding %s to %s as metadata not recognised.\n",
928 devname, mp->path);
929 goto next;
930 }
931 /* Need to double check the 'act_spare' permissions applies
932 * to this metadata.
933 */
934 if (!policy_action_allows(pol, st2->ss->name, act_spare))
935 goto next;
936 if (!bare && !policy_action_allows(pol, st2->ss->name,
937 act_spare_same_slot))
938 goto next;
939 } else
940 st2 = st;
941 /* update number of failed disks for mostly degraded
942 * container member */
943 if (sra->array.failed_disks == -1)
944 sra->array.failed_disks = container_members_max_degradation(map, mp);
945
946 get_dev_size(dfd, NULL, &devsize);
947 if (sra->component_size == 0) {
948 /* true for containers, here we must read superblock
949 * to obtain minimum spare size */
950 struct supertype *st3 = dup_super(st2);
951 int mdfd = open_dev(mp->devnm);
952 if (mdfd < 0) {
953 free(st3);
954 goto next;
955 }
956 if (st3->ss->load_container &&
957 !st3->ss->load_container(st3, mdfd, mp->path)) {
958 component_size = st3->ss->min_acceptable_spare_size(st3);
959 st3->ss->free_super(st3);
960 }
961 free(st3);
962 close(mdfd);
963 }
964 if ((sra->component_size > 0 &&
965 st2->ss->avail_size(st2, devsize,
966 sra->devs
967 ? sra->devs->data_offset
968 : INVALID_SECTORS)
969 < sra->component_size)
970 ||
971 (sra->component_size == 0 && devsize < component_size)) {
972 if (verbose > 1)
973 pr_err("not adding %s to %s as it is too small\n",
974 devname, mp->path);
975 goto next;
976 }
977 /* test against target.
978 * If 'target' is set and 'bare' is false, we only accept
979 * arrays/containers that match 'target'.
980 * If 'target' is set and 'bare' is true, we prefer the
981 * array which matches 'target'.
982 * target is considered only if we deal with degraded array
983 */
984 if (target && policy_action_allows(pol, st2->ss->name,
985 act_spare_same_slot)) {
986 if (strcmp(target->metadata, mp->metadata) == 0 &&
987 memcmp(target->uuid, mp->uuid,
988 sizeof(target->uuid)) == 0 &&
989 sra->array.failed_disks > 0) {
990 /* This is our target!! */
991 sysfs_free(chosen);
992 chosen = sra;
993 sra = NULL;
994 /* skip to end so we don't check any more */
995 while (mp->next)
996 mp = mp->next;
997 goto next;
998 }
999 /* not our target */
1000 if (!bare)
1001 goto next;
1002 }
1003
1004 dl = domain_from_array(sra, st2->ss->name);
1005 if (domain_test(dl, pol, st2->ss->name) != 1) {
1006 /* domain test fails */
1007 if (verbose > 1)
1008 pr_err("not adding %s to %s as it is not in a compatible domain\n",
1009 devname, mp->path);
1010
1011 goto next;
1012 }
1013 /* all tests passed, OK to add to this array */
1014 if (!chosen) {
1015 chosen = sra;
1016 sra = NULL;
1017 } else if (chosen->array.failed_disks < sra->array.failed_disks) {
1018 sysfs_free(chosen);
1019 chosen = sra;
1020 sra = NULL;
1021 }
1022 next:
1023 sysfs_free(sra);
1024 if (st != st2)
1025 free(st2);
1026 if (dl)
1027 domain_free(dl);
1028 }
1029 if (chosen) {
1030 /* add current device to chosen array as a spare */
1031 int mdfd = open_dev(chosen->sys_name);
1032 if (mdfd >= 0) {
1033 struct mddev_dev devlist;
1034 char chosen_devname[24]; // 2*11 for int (including signs) + colon + null
1035 devlist.next = NULL;
1036 devlist.used = 0;
1037 devlist.writemostly = 0;
1038 devlist.devname = chosen_devname;
1039 sprintf(chosen_devname, "%d:%d", major(stb.st_rdev),
1040 minor(stb.st_rdev));
1041 devlist.disposition = 'a';
1042 close(dfd);
1043 *dfdp = -1;
1044 rv = Manage_subdevs(chosen->sys_name, mdfd, &devlist,
1045 -1, 0, NULL, 0);
1046 close(mdfd);
1047 }
1048 if (verbose > 0) {
1049 if (rv == 0)
1050 pr_err("added %s as spare for %s\n",
1051 devname, chosen->sys_name);
1052 else
1053 pr_err("failed to add %s as spare for %s\n",
1054 devname, chosen->sys_name);
1055 }
1056 sysfs_free(chosen);
1057 }
1058 map_unlock(&map);
1059 return rv;
1060 }
1061
1062 static int partition_try_spare(char *devname, int *dfdp, struct dev_policy *pol,
1063 struct supertype *st, int verbose)
1064 {
1065 /* we know that at least one partition virtual-metadata is
1066 * allowed to incorporate spares like this device. We need to
1067 * find a suitable device to copy partition information from.
1068 *
1069 * Getting a list of all disk (not partition) devices is
1070 * slightly non-trivial. We could look at /sys/block, but
1071 * that is theoretically due to be removed. Maybe best to use
1072 * /dev/disk/by-path/?* and ignore names ending '-partNN' as
1073 * we depend on this directory of 'path' info. But that fails
1074 * to find loop devices and probably others. Maybe don't
1075 * worry about that, they aren't the real target.
1076 *
1077 * So: check things in /dev/disk/by-path to see if they are in
1078 * a compatible domain, then load the partition table and see
1079 * if it is OK for the new device, and choose the largest
1080 * partition table that fits.
1081 */
1082 DIR *dir;
1083 struct dirent *de;
1084 char *chosen = NULL;
1085 unsigned long long chosen_size = 0;
1086 struct supertype *chosen_st = NULL;
1087 int fd;
1088
1089 dir = opendir("/dev/disk/by-path");
1090 if (!dir)
1091 return 1;
1092 while ((de = readdir(dir)) != NULL) {
1093 char *ep;
1094 struct dev_policy *pol2 = NULL;
1095 struct domainlist *domlist = NULL;
1096 int fd = -1;
1097 struct mdinfo info;
1098 struct supertype *st2 = NULL;
1099 char *devname = NULL;
1100 unsigned long long devsectors;
1101
1102 if (de->d_ino == 0 ||
1103 de->d_name[0] == '.' ||
1104 (de->d_type != DT_LNK && de->d_type != DT_UNKNOWN))
1105 goto next;
1106
1107 ep = de->d_name + strlen(de->d_name);
1108 while (ep > de->d_name &&
1109 isdigit(ep[-1]))
1110 ep--;
1111 if (ep > de->d_name + 5 &&
1112 strncmp(ep-5, "-part", 5) == 0)
1113 /* This is a partition - skip it */
1114 goto next;
1115
1116 pol2 = path_policy(de->d_name, type_disk);
1117
1118 domain_merge(&domlist, pol2, st ? st->ss->name : NULL);
1119 if (domain_test(domlist, pol, st ? st->ss->name : NULL) != 1)
1120 /* new device is incompatible with this device. */
1121 goto next;
1122
1123 domain_free(domlist);
1124 domlist = NULL;
1125
1126 if (asprintf(&devname, "/dev/disk/by-path/%s", de->d_name) != 1) {
1127 devname = NULL;
1128 goto next;
1129 }
1130 fd = open(devname, O_RDONLY);
1131 if (fd < 0)
1132 goto next;
1133 if (get_dev_size(fd, devname, &devsectors) == 0)
1134 goto next;
1135 devsectors >>= 9;
1136
1137 if (st)
1138 st2 = dup_super(st);
1139 else
1140 st2 = guess_super_type(fd, guess_partitions);
1141 if (st2 == NULL ||
1142 st2->ss->load_super(st2, fd, NULL) < 0)
1143 goto next;
1144 st2->ignore_hw_compat = 0;
1145
1146 if (!st) {
1147 /* Check domain policy again, this time referring to metadata */
1148 domain_merge(&domlist, pol2, st2->ss->name);
1149 if (domain_test(domlist, pol, st2->ss->name) != 1)
1150 /* Incompatible devices for this metadata type */
1151 goto next;
1152 if (!policy_action_allows(pol, st2->ss->name, act_spare))
1153 /* Some partition types allow sparing, but not
1154 * this one.
1155 */
1156 goto next;
1157 }
1158
1159 st2->ss->getinfo_super(st2, &info, NULL);
1160 if (info.component_size > devsectors)
1161 /* This partitioning doesn't fit in the device */
1162 goto next;
1163
1164 /* This is an acceptable device to copy partition
1165 * metadata from. We could just stop here, but I
1166 * think I want to keep looking incase a larger
1167 * metadata which makes better use of the device can
1168 * be found.
1169 */
1170 if (chosen == NULL ||
1171 chosen_size < info.component_size) {
1172 chosen_size = info.component_size;
1173 free(chosen);
1174 chosen = devname;
1175 devname = NULL;
1176 if (chosen_st) {
1177 chosen_st->ss->free_super(chosen_st);
1178 free(chosen_st);
1179 }
1180 chosen_st = st2;
1181 st2 = NULL;
1182 }
1183
1184 next:
1185 free(devname);
1186 domain_free(domlist);
1187 dev_policy_free(pol2);
1188 if (st2)
1189 st2->ss->free_super(st2);
1190 free(st2);
1191
1192 if (fd >= 0)
1193 close(fd);
1194 }
1195
1196 closedir(dir);
1197
1198 if (!chosen)
1199 return 1;
1200
1201 /* 'chosen' is the best device we can find. Let's write its
1202 * metadata to devname dfd is read-only so don't use that
1203 */
1204 fd = open(devname, O_RDWR);
1205 if (fd >= 0) {
1206 chosen_st->ss->store_super(chosen_st, fd);
1207 close(fd);
1208 }
1209 free(chosen);
1210 chosen_st->ss->free_super(chosen_st);
1211 free(chosen_st);
1212 return 0;
1213 }
1214
1215 static int is_bare(int dfd)
1216 {
1217 unsigned long long size = 0;
1218 char bufpad[4096 + 4096];
1219 char *buf = (char*)(((long)bufpad + 4096) & ~4095);
1220
1221 if (lseek(dfd, 0, SEEK_SET) != 0 ||
1222 read(dfd, buf, 4096) != 4096)
1223 return 0;
1224
1225 if (buf[0] != '\0' && buf[0] != '\x5a' && buf[0] != '\xff')
1226 return 0;
1227 if (memcmp(buf, buf+1, 4095) != 0)
1228 return 0;
1229
1230 /* OK, first 4K appear blank, try the end. */
1231 get_dev_size(dfd, NULL, &size);
1232 if (lseek(dfd, size-4096, SEEK_SET) < 0 ||
1233 read(dfd, buf, 4096) != 4096)
1234 return 0;
1235
1236 if (buf[0] != '\0' && buf[0] != '\x5a' && buf[0] != '\xff')
1237 return 0;
1238 if (memcmp(buf, buf+1, 4095) != 0)
1239 return 0;
1240
1241 return 1;
1242 }
1243
1244 /* adding a spare to a regular array is quite different from adding one to
1245 * a set-of-partitions virtual array.
1246 * This function determines which is worth trying and tries as appropriate.
1247 * Arrays are given priority over partitions.
1248 */
1249 static int try_spare(char *devname, int *dfdp, struct dev_policy *pol,
1250 struct map_ent *target,
1251 struct supertype *st, int verbose)
1252 {
1253 int i;
1254 int rv;
1255 int arrays_ok = 0;
1256 int partitions_ok = 0;
1257 int dfd = *dfdp;
1258 int bare;
1259
1260 /* Can only add a spare if device has at least one domain */
1261 if (pol_find(pol, pol_domain) == NULL)
1262 return 1;
1263 /* And only if some action allows spares */
1264 if (!policy_action_allows(pol, st?st->ss->name:NULL, act_spare))
1265 return 1;
1266
1267 /* Now check if the device is bare.
1268 * bare devices can always be added as a spare
1269 * non-bare devices can only be added if spare-same-slot is permitted,
1270 * and this device is replacing a previous device - in which case 'target'
1271 * will be set.
1272 */
1273 if (!is_bare(dfd)) {
1274 /* Must have a target and allow same_slot */
1275 /* Later - may allow force_spare without target */
1276 if (!target ||
1277 !policy_action_allows(pol, st?st->ss->name:NULL,
1278 act_spare_same_slot)) {
1279 if (verbose > 1)
1280 pr_err("%s is not bare, so not considering as a spare\n",
1281 devname);
1282 return 1;
1283 }
1284 bare = 0;
1285 } else
1286 bare = 1;
1287
1288 /* It might be OK to add this device to an array - need to see
1289 * what arrays might be candidates.
1290 */
1291 if (st) {
1292 /* just try try 'array' or 'partition' based on this metadata */
1293 if (st->ss->add_to_super)
1294 return array_try_spare(devname, dfdp, pol, target, bare,
1295 st, verbose);
1296 else
1297 return partition_try_spare(devname, dfdp, pol,
1298 st, verbose);
1299 }
1300 /* No metadata was specified or found so options are open.
1301 * Check for whether any array metadata, or any partition metadata
1302 * might allow adding the spare. This check is just help to avoid
1303 * a more costly scan of all arrays when we can be sure that will
1304 * fail.
1305 */
1306 for (i = 0; (!arrays_ok || !partitions_ok) && superlist[i] ; i++) {
1307 if (superlist[i]->add_to_super && !arrays_ok &&
1308 policy_action_allows(pol, superlist[i]->name, act_spare))
1309 arrays_ok = 1;
1310 if (superlist[i]->add_to_super == NULL && !partitions_ok &&
1311 policy_action_allows(pol, superlist[i]->name, act_spare))
1312 partitions_ok = 1;
1313 }
1314 rv = 1;
1315 if (arrays_ok)
1316 rv = array_try_spare(devname, dfdp, pol, target, bare,
1317 st, verbose);
1318 if (rv != 0 && partitions_ok)
1319 rv = partition_try_spare(devname, dfdp, pol, st, verbose);
1320 return rv;
1321 }
1322
1323 int IncrementalScan(struct context *c, char *devnm)
1324 {
1325 /* look at every device listed in the 'map' file.
1326 * If one is found that is not running then:
1327 * look in mdadm.conf for bitmap file.
1328 * if one exists, but array has none, add it.
1329 * try to start array in auto-readonly mode
1330 */
1331 struct map_ent *mapl = NULL;
1332 struct map_ent *me;
1333 struct mddev_ident *devs, *mddev;
1334 int rv = 0;
1335 char container[32];
1336 char *only = NULL;
1337
1338 map_read(&mapl);
1339 devs = conf_get_ident(NULL);
1340
1341 restart:
1342 for (me = mapl ; me ; me = me->next) {
1343 mdu_array_info_t array;
1344 mdu_bitmap_file_t bmf;
1345 struct mdinfo *sra;
1346 int mdfd;
1347
1348 if (devnm && strcmp(devnm, me->devnm) != 0)
1349 continue;
1350 if (me->metadata[0] == '/') {
1351 char *sl;
1352
1353 if (!devnm)
1354 continue;
1355
1356 /* member array, need to work on container */
1357 strncpy(container, me->metadata+1, 32);
1358 container[31] = 0;
1359 sl = strchr(container, '/');
1360 if (sl)
1361 *sl = 0;
1362 only = devnm;
1363 devnm = container;
1364 goto restart;
1365 }
1366 mdfd = open_dev(me->devnm);
1367
1368 if (mdfd < 0)
1369 continue;
1370 if (!isdigit(me->metadata[0])) {
1371 /* must be a container */
1372 struct supertype *st = super_by_fd(mdfd, NULL);
1373 int ret = 0;
1374 struct map_ent *map = NULL;
1375
1376 if (st && st->ss->load_container)
1377 ret = st->ss->load_container(st, mdfd, NULL);
1378 close(mdfd);
1379 if (!ret && st && st->ss->container_content) {
1380 if (map_lock(&map))
1381 pr_err("failed to get exclusive lock on mapfile\n");
1382 ret = Incremental_container(st, me->path, c, only);
1383 map_unlock(&map);
1384 }
1385 if (ret)
1386 rv = 1;
1387 continue;
1388 }
1389 if (ioctl(mdfd, GET_ARRAY_INFO, &array) == 0 ||
1390 errno != ENODEV) {
1391 close(mdfd);
1392 continue;
1393 }
1394 /* Ok, we can try this one. Maybe it needs a bitmap */
1395 for (mddev = devs ; mddev ; mddev = mddev->next)
1396 if (mddev->devname && me->path
1397 && devname_matches(mddev->devname, me->path))
1398 break;
1399 if (mddev && mddev->bitmap_file) {
1400 /*
1401 * Note: early kernels will wrongly fail this, so it
1402 * is a hint only
1403 */
1404 int added = -1;
1405 if (ioctl(mdfd, GET_ARRAY_INFO, &bmf) < 0) {
1406 int bmfd = open(mddev->bitmap_file, O_RDWR);
1407 if (bmfd >= 0) {
1408 added = ioctl(mdfd, SET_BITMAP_FILE,
1409 bmfd);
1410 close(bmfd);
1411 }
1412 }
1413 if (c->verbose >= 0) {
1414 if (added == 0)
1415 pr_err("Added bitmap %s to %s\n",
1416 mddev->bitmap_file, me->path);
1417 else if (errno != EEXIST)
1418 pr_err("Failed to add bitmap to %s: %s\n",
1419 me->path, strerror(errno));
1420 }
1421 }
1422 /* FIXME check for reshape_active and consider not
1423 * starting array.
1424 */
1425 sra = sysfs_read(mdfd, NULL, 0);
1426 if (sra) {
1427 if (sysfs_set_str(sra, NULL,
1428 "array_state", "read-auto") == 0) {
1429 if (c->verbose >= 0)
1430 pr_err("started array %s\n",
1431 me->path ?: me->devnm);
1432 } else {
1433 pr_err("failed to start array %s: %s\n",
1434 me->path ?: me->devnm,
1435 strerror(errno));
1436 rv = 1;
1437 }
1438 sysfs_free(sra);
1439 }
1440 }
1441 return rv;
1442 }
1443
1444 static char *container2devname(char *devname)
1445 {
1446 char *mdname = NULL;
1447
1448 if (devname[0] == '/') {
1449 int fd = open(devname, O_RDONLY);
1450 if (fd >= 0) {
1451 mdname = xstrdup(fd2devnm(fd));
1452 close(fd);
1453 }
1454 } else {
1455 int uuid[4];
1456 struct map_ent *mp, *map = NULL;
1457
1458 if (!parse_uuid(devname, uuid))
1459 return mdname;
1460 mp = map_by_uuid(&map, uuid);
1461 if (mp)
1462 mdname = xstrdup(mp->devnm);
1463 map_free(map);
1464 }
1465
1466 return mdname;
1467 }
1468
1469 static int Incremental_container(struct supertype *st, char *devname,
1470 struct context *c, char *only)
1471 {
1472 /* Collect the contents of this container and for each
1473 * array, choose a device name and assemble the array.
1474 */
1475
1476 struct mdinfo *list;
1477 struct mdinfo *ra;
1478 struct map_ent *map = NULL;
1479 struct mdinfo info;
1480 int trustworthy;
1481 struct mddev_ident *match;
1482 int rv = 0;
1483 struct domainlist *domains;
1484 struct map_ent *smp;
1485 int suuid[4];
1486 int sfd;
1487 int ra_blocked = 0;
1488 int ra_all = 0;
1489 int result = 0;
1490
1491 st->ss->getinfo_super(st, &info, NULL);
1492
1493 if ((c->runstop > 0 && info.container_enough >= 0) ||
1494 info.container_enough > 0)
1495 /* pass */;
1496 else {
1497 if (c->export) {
1498 printf("MD_STARTED=no\n");
1499 } else if (c->verbose)
1500 pr_err("not enough devices to start the container\n");
1501 return 0;
1502 }
1503
1504 match = conf_match(st, &info, devname, c->verbose, &rv);
1505 if (match == NULL && rv == 2)
1506 return rv;
1507
1508 /* Need to compute 'trustworthy' */
1509 if (match)
1510 trustworthy = LOCAL;
1511 else if (st->ss->match_home(st, c->homehost) == 1)
1512 trustworthy = LOCAL;
1513 else if (st->ss->match_home(st, "any") == 1)
1514 trustworthy = LOCAL;
1515 else
1516 trustworthy = FOREIGN;
1517
1518 list = st->ss->container_content(st, NULL);
1519 /* when nothing to activate - quit */
1520 if (list == NULL) {
1521 if (c->export) {
1522 printf("MD_STARTED=nothing\n");
1523 }
1524 return 0;
1525 }
1526 for (ra = list ; ra ; ra = ra->next) {
1527 int mdfd;
1528 char chosen_name[1024];
1529 struct map_ent *mp;
1530 struct mddev_ident *match = NULL;
1531
1532 ra_all++;
1533 /* do not activate arrays blocked by metadata handler */
1534 if (ra->array.state & (1 << MD_SB_BLOCK_VOLUME)) {
1535 pr_err("Cannot activate array %s in %s.\n",
1536 ra->text_version, devname);
1537 ra_blocked++;
1538 continue;
1539 }
1540 mp = map_by_uuid(&map, ra->uuid);
1541
1542 if (mp) {
1543 mdfd = open_dev(mp->devnm);
1544 if (mp->path)
1545 strcpy(chosen_name, mp->path);
1546 else
1547 strcpy(chosen_name, mp->devnm);
1548 } else if (!only) {
1549
1550 /* Check in mdadm.conf for container == devname and
1551 * member == ra->text_version after second slash.
1552 */
1553 char *sub = strchr(ra->text_version+1, '/');
1554 struct mddev_ident *array_list;
1555 if (sub) {
1556 sub++;
1557 array_list = conf_get_ident(NULL);
1558 } else
1559 array_list = NULL;
1560 for(; array_list ; array_list = array_list->next) {
1561 char *dn;
1562 if (array_list->member == NULL ||
1563 array_list->container == NULL)
1564 continue;
1565 if (strcmp(array_list->member, sub) != 0)
1566 continue;
1567 if (array_list->uuid_set &&
1568 !same_uuid(ra->uuid, array_list->uuid, st->ss->swapuuid))
1569 continue;
1570 dn = container2devname(array_list->container);
1571 if (dn == NULL)
1572 continue;
1573 if (strncmp(dn, ra->text_version+1,
1574 strlen(dn)) != 0 ||
1575 ra->text_version[strlen(dn)+1] != '/') {
1576 free(dn);
1577 continue;
1578 }
1579 free(dn);
1580 /* we have a match */
1581 match = array_list;
1582 if (c->verbose>0)
1583 pr_err("match found for member %s\n",
1584 array_list->member);
1585 break;
1586 }
1587
1588 if (match && match->devname &&
1589 strcasecmp(match->devname, "<ignore>") == 0) {
1590 if (c->verbose > 0)
1591 pr_err("array %s/%s is explicitly ignored by mdadm.conf\n",
1592 match->container, match->member);
1593 continue;
1594 }
1595 if (match)
1596 trustworthy = LOCAL;
1597
1598 mdfd = create_mddev(match ? match->devname : NULL,
1599 ra->name,
1600 c->autof,
1601 trustworthy,
1602 chosen_name);
1603 }
1604 if (only && (!mp || strcmp(mp->devnm, only) != 0))
1605 continue;
1606
1607 if (mdfd < 0) {
1608 pr_err("failed to open %s: %s.\n",
1609 chosen_name, strerror(errno));
1610 return 2;
1611 }
1612
1613 assemble_container_content(st, mdfd, ra, c,
1614 chosen_name, &result);
1615 close(mdfd);
1616 }
1617 if (c->export && result) {
1618 char sep = '=';
1619 printf("MD_STARTED");
1620 if (result & INCR_NO) {
1621 printf("%cno", sep);
1622 sep = ',';
1623 }
1624 if (result & INCR_UNSAFE) {
1625 printf("%cunsafe", sep);
1626 sep = ',';
1627 }
1628 if (result & INCR_ALREADY) {
1629 printf("%calready", sep);
1630 sep = ',';
1631 }
1632 if (result & INCR_YES) {
1633 printf("%cyes", sep);
1634 sep = ',';
1635 }
1636 printf("\n");
1637 }
1638
1639 /* don't move spares to container with volume being activated
1640 when all volumes are blocked */
1641 if (ra_all == ra_blocked)
1642 return 0;
1643
1644 /* Now move all suitable spares from spare container */
1645 domains = domain_from_array(list, st->ss->name);
1646 memcpy(suuid, uuid_zero, sizeof(int[4]));
1647 if (domains &&
1648 (smp = map_by_uuid(&map, suuid)) != NULL &&
1649 (sfd = open(smp->path, O_RDONLY)) >= 0) {
1650 /* spare container found */
1651 struct supertype *sst =
1652 super_imsm.match_metadata_desc("imsm");
1653 struct mdinfo *sinfo;
1654 unsigned long long min_size = 0;
1655 if (st->ss->min_acceptable_spare_size)
1656 min_size = st->ss->min_acceptable_spare_size(st);
1657 if (!sst->ss->load_container(sst, sfd, NULL)) {
1658 close(sfd);
1659 sinfo = container_choose_spares(sst, min_size,
1660 domains, NULL,
1661 st->ss->name, 0);
1662 sst->ss->free_super(sst);
1663 if (sinfo){
1664 int count = 0;
1665 struct mdinfo *disks = sinfo->devs;
1666 while (disks) {
1667 /* move spare from spare
1668 * container to currently
1669 * assembled one
1670 */
1671 if (move_spare(
1672 smp->path,
1673 devname,
1674 makedev(disks->disk.major,
1675 disks->disk.minor)))
1676 count++;
1677 disks = disks->next;
1678 }
1679 if (count)
1680 pr_err("Added %d spare%s to %s\n",
1681 count, count>1?"s":"", devname);
1682 }
1683 sysfs_free(sinfo);
1684 } else
1685 close(sfd);
1686 }
1687 domain_free(domains);
1688 return 0;
1689 }
1690
1691 static void run_udisks(char *arg1, char *arg2)
1692 {
1693 int pid = fork();
1694 int status;
1695 if (pid == 0) {
1696 execl("/usr/bin/udisks", "udisks", arg1, arg2, NULL);
1697 execl("/bin/udisks", "udisks", arg1, arg2, NULL);
1698 exit(1);
1699 }
1700 while (pid > 0 && wait(&status) != pid)
1701 ;
1702 }
1703
1704 /*
1705 * IncrementalRemove - Attempt to see if the passed in device belongs to any
1706 * raid arrays, and if so first fail (if needed) and then remove the device.
1707 *
1708 * @devname - The device we want to remove
1709 * @id_path - name as found in /dev/disk/by-path for this device
1710 *
1711 * Note: the device name must be a kernel name like "sda", so
1712 * that we can find it in /proc/mdstat
1713 */
1714 int IncrementalRemove(char *devname, char *id_path, int verbose)
1715 {
1716 int mdfd;
1717 int rv = 0;
1718 struct mdstat_ent *ent;
1719 struct mddev_dev devlist;
1720 struct mdinfo mdi;
1721 char buf[32];
1722
1723 if (!id_path)
1724 dprintf("incremental removal without --path <id_path> lacks the possibility to re-add new device in this port\n");
1725
1726 if (strchr(devname, '/')) {
1727 pr_err("incremental removal requires a kernel device name, not a file: %s\n", devname);
1728 return 1;
1729 }
1730 ent = mdstat_by_component(devname);
1731 if (!ent) {
1732 if (verbose >= 0)
1733 pr_err("%s does not appear to be a component of any array\n", devname);
1734 return 1;
1735 }
1736 sysfs_init(&mdi, -1, ent->devnm);
1737 mdfd = open_dev_excl(ent->devnm);
1738 if (mdfd > 0) {
1739 close(mdfd);
1740 if (sysfs_get_str(&mdi, NULL, "array_state",
1741 buf, sizeof(buf)) > 0) {
1742 if (strncmp(buf, "active", 6) == 0 ||
1743 strncmp(buf, "clean", 5) == 0)
1744 sysfs_set_str(&mdi, NULL,
1745 "array_state", "read-auto");
1746 }
1747 }
1748 mdfd = open_dev(ent->devnm);
1749 if (mdfd < 0) {
1750 if (verbose >= 0)
1751 pr_err("Cannot open array %s!!\n", ent->devnm);
1752 free_mdstat(ent);
1753 return 1;
1754 }
1755
1756 if (id_path) {
1757 struct map_ent *map = NULL, *me;
1758 me = map_by_devnm(&map, ent->devnm);
1759 if (me)
1760 policy_save_path(id_path, me);
1761 map_free(map);
1762 }
1763
1764 memset(&devlist, 0, sizeof(devlist));
1765 devlist.devname = devname;
1766 devlist.disposition = 'f';
1767 /* for a container, we must fail each member array */
1768 if (ent->metadata_version &&
1769 strncmp(ent->metadata_version, "external:", 9) == 0) {
1770 struct mdstat_ent *mdstat = mdstat_read(0, 0);
1771 struct mdstat_ent *memb;
1772 for (memb = mdstat ; memb ; memb = memb->next)
1773 if (is_container_member(memb, ent->devnm)) {
1774 int subfd = open_dev(memb->devnm);
1775 if (subfd >= 0) {
1776 rv |= Manage_subdevs(
1777 memb->devnm, subfd,
1778 &devlist, verbose, 0,
1779 NULL, 0);
1780 close(subfd);
1781 }
1782 }
1783 free_mdstat(mdstat);
1784 } else
1785 rv |= Manage_subdevs(ent->devnm, mdfd, &devlist,
1786 verbose, 0, NULL, 0);
1787 if (rv & 2) {
1788 /* Failed due to EBUSY, try to stop the array.
1789 * Give udisks a chance to unmount it first.
1790 */
1791 int devid = devnm2devid(ent->devnm);
1792 run_udisks("--unmount", map_dev(major(devid),minor(devid), 0));
1793 rv = Manage_stop(ent->devnm, mdfd, verbose, 1);
1794 if (rv)
1795 /* At least we can try to trigger a 'remove' */
1796 sysfs_uevent(&mdi, "remove");
1797 if (verbose) {
1798 if (rv)
1799 pr_err("Fail to stop %s too.\n", ent->devnm);
1800 }
1801 } else {
1802 devlist.disposition = 'r';
1803 rv = Manage_subdevs(ent->devnm, mdfd, &devlist,
1804 verbose, 0, NULL, 0);
1805 }
1806 close(mdfd);
1807 free_mdstat(ent);
1808 return rv;
1809 }
Unnamed repository; edit this file 'description' to name the repository.