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1 /*
2 * Incremental.c - support --incremental. Part of:
3 * mdadm - manage Linux "md" devices aka RAID arrays.
4 *
5 * Copyright (C) 2006-2013 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 = FlagDefault;
1038 devlist.failfast = FlagDefault;
1039 devlist.devname = chosen_devname;
1040 sprintf(chosen_devname, "%d:%d", major(stb.st_rdev),
1041 minor(stb.st_rdev));
1042 devlist.disposition = 'a';
1043 close(dfd);
1044 *dfdp = -1;
1045 rv = Manage_subdevs(chosen->sys_name, mdfd, &devlist,
1046 -1, 0, NULL, 0);
1047 close(mdfd);
1048 }
1049 if (verbose > 0) {
1050 if (rv == 0)
1051 pr_err("added %s as spare for %s\n",
1052 devname, chosen->sys_name);
1053 else
1054 pr_err("failed to add %s as spare for %s\n",
1055 devname, chosen->sys_name);
1056 }
1057 sysfs_free(chosen);
1058 }
1059 map_unlock(&map);
1060 return rv;
1061 }
1062
1063 static int partition_try_spare(char *devname, int *dfdp, struct dev_policy *pol,
1064 struct supertype *st, int verbose)
1065 {
1066 /* we know that at least one partition virtual-metadata is
1067 * allowed to incorporate spares like this device. We need to
1068 * find a suitable device to copy partition information from.
1069 *
1070 * Getting a list of all disk (not partition) devices is
1071 * slightly non-trivial. We could look at /sys/block, but
1072 * that is theoretically due to be removed. Maybe best to use
1073 * /dev/disk/by-path/?* and ignore names ending '-partNN' as
1074 * we depend on this directory of 'path' info. But that fails
1075 * to find loop devices and probably others. Maybe don't
1076 * worry about that, they aren't the real target.
1077 *
1078 * So: check things in /dev/disk/by-path to see if they are in
1079 * a compatible domain, then load the partition table and see
1080 * if it is OK for the new device, and choose the largest
1081 * partition table that fits.
1082 */
1083 DIR *dir;
1084 struct dirent *de;
1085 char *chosen = NULL;
1086 unsigned long long chosen_size = 0;
1087 struct supertype *chosen_st = NULL;
1088 int fd;
1089
1090 dir = opendir("/dev/disk/by-path");
1091 if (!dir)
1092 return 1;
1093 while ((de = readdir(dir)) != NULL) {
1094 char *ep;
1095 struct dev_policy *pol2 = NULL;
1096 struct domainlist *domlist = NULL;
1097 int fd = -1;
1098 struct mdinfo info;
1099 struct supertype *st2 = NULL;
1100 char *devname = NULL;
1101 unsigned long long devsectors;
1102
1103 if (de->d_ino == 0 ||
1104 de->d_name[0] == '.' ||
1105 (de->d_type != DT_LNK && de->d_type != DT_UNKNOWN))
1106 goto next;
1107
1108 ep = de->d_name + strlen(de->d_name);
1109 while (ep > de->d_name &&
1110 isdigit(ep[-1]))
1111 ep--;
1112 if (ep > de->d_name + 5 &&
1113 strncmp(ep-5, "-part", 5) == 0)
1114 /* This is a partition - skip it */
1115 goto next;
1116
1117 pol2 = path_policy(de->d_name, type_disk);
1118
1119 domain_merge(&domlist, pol2, st ? st->ss->name : NULL);
1120 if (domain_test(domlist, pol, st ? st->ss->name : NULL) != 1)
1121 /* new device is incompatible with this device. */
1122 goto next;
1123
1124 domain_free(domlist);
1125 domlist = NULL;
1126
1127 if (asprintf(&devname, "/dev/disk/by-path/%s", de->d_name) != 1) {
1128 devname = NULL;
1129 goto next;
1130 }
1131 fd = open(devname, O_RDONLY);
1132 if (fd < 0)
1133 goto next;
1134 if (get_dev_size(fd, devname, &devsectors) == 0)
1135 goto next;
1136 devsectors >>= 9;
1137
1138 if (st)
1139 st2 = dup_super(st);
1140 else
1141 st2 = guess_super_type(fd, guess_partitions);
1142 if (st2 == NULL ||
1143 st2->ss->load_super(st2, fd, NULL) < 0)
1144 goto next;
1145 st2->ignore_hw_compat = 0;
1146
1147 if (!st) {
1148 /* Check domain policy again, this time referring to metadata */
1149 domain_merge(&domlist, pol2, st2->ss->name);
1150 if (domain_test(domlist, pol, st2->ss->name) != 1)
1151 /* Incompatible devices for this metadata type */
1152 goto next;
1153 if (!policy_action_allows(pol, st2->ss->name, act_spare))
1154 /* Some partition types allow sparing, but not
1155 * this one.
1156 */
1157 goto next;
1158 }
1159
1160 st2->ss->getinfo_super(st2, &info, NULL);
1161 if (info.component_size > devsectors)
1162 /* This partitioning doesn't fit in the device */
1163 goto next;
1164
1165 /* This is an acceptable device to copy partition
1166 * metadata from. We could just stop here, but I
1167 * think I want to keep looking incase a larger
1168 * metadata which makes better use of the device can
1169 * be found.
1170 */
1171 if (chosen == NULL ||
1172 chosen_size < info.component_size) {
1173 chosen_size = info.component_size;
1174 free(chosen);
1175 chosen = devname;
1176 devname = NULL;
1177 if (chosen_st) {
1178 chosen_st->ss->free_super(chosen_st);
1179 free(chosen_st);
1180 }
1181 chosen_st = st2;
1182 st2 = NULL;
1183 }
1184
1185 next:
1186 free(devname);
1187 domain_free(domlist);
1188 dev_policy_free(pol2);
1189 if (st2)
1190 st2->ss->free_super(st2);
1191 free(st2);
1192
1193 if (fd >= 0)
1194 close(fd);
1195 }
1196
1197 closedir(dir);
1198
1199 if (!chosen)
1200 return 1;
1201
1202 /* 'chosen' is the best device we can find. Let's write its
1203 * metadata to devname dfd is read-only so don't use that
1204 */
1205 fd = open(devname, O_RDWR);
1206 if (fd >= 0) {
1207 chosen_st->ss->store_super(chosen_st, fd);
1208 close(fd);
1209 }
1210 free(chosen);
1211 chosen_st->ss->free_super(chosen_st);
1212 free(chosen_st);
1213 return 0;
1214 }
1215
1216 static int is_bare(int dfd)
1217 {
1218 unsigned long long size = 0;
1219 char bufpad[4096 + 4096];
1220 char *buf = (char*)(((long)bufpad + 4096) & ~4095);
1221
1222 if (lseek(dfd, 0, SEEK_SET) != 0 ||
1223 read(dfd, buf, 4096) != 4096)
1224 return 0;
1225
1226 if (buf[0] != '\0' && buf[0] != '\x5a' && buf[0] != '\xff')
1227 return 0;
1228 if (memcmp(buf, buf+1, 4095) != 0)
1229 return 0;
1230
1231 /* OK, first 4K appear blank, try the end. */
1232 get_dev_size(dfd, NULL, &size);
1233 if (lseek(dfd, size-4096, SEEK_SET) < 0 ||
1234 read(dfd, buf, 4096) != 4096)
1235 return 0;
1236
1237 if (buf[0] != '\0' && buf[0] != '\x5a' && buf[0] != '\xff')
1238 return 0;
1239 if (memcmp(buf, buf+1, 4095) != 0)
1240 return 0;
1241
1242 return 1;
1243 }
1244
1245 /* adding a spare to a regular array is quite different from adding one to
1246 * a set-of-partitions virtual array.
1247 * This function determines which is worth trying and tries as appropriate.
1248 * Arrays are given priority over partitions.
1249 */
1250 static int try_spare(char *devname, int *dfdp, struct dev_policy *pol,
1251 struct map_ent *target,
1252 struct supertype *st, int verbose)
1253 {
1254 int i;
1255 int rv;
1256 int arrays_ok = 0;
1257 int partitions_ok = 0;
1258 int dfd = *dfdp;
1259 int bare;
1260
1261 /* Can only add a spare if device has at least one domain */
1262 if (pol_find(pol, pol_domain) == NULL)
1263 return 1;
1264 /* And only if some action allows spares */
1265 if (!policy_action_allows(pol, st?st->ss->name:NULL, act_spare))
1266 return 1;
1267
1268 /* Now check if the device is bare.
1269 * bare devices can always be added as a spare
1270 * non-bare devices can only be added if spare-same-slot is permitted,
1271 * and this device is replacing a previous device - in which case 'target'
1272 * will be set.
1273 */
1274 if (!is_bare(dfd)) {
1275 /* Must have a target and allow same_slot */
1276 /* Later - may allow force_spare without target */
1277 if (!target ||
1278 !policy_action_allows(pol, st?st->ss->name:NULL,
1279 act_spare_same_slot)) {
1280 if (verbose > 1)
1281 pr_err("%s is not bare, so not considering as a spare\n",
1282 devname);
1283 return 1;
1284 }
1285 bare = 0;
1286 } else
1287 bare = 1;
1288
1289 /* It might be OK to add this device to an array - need to see
1290 * what arrays might be candidates.
1291 */
1292 if (st) {
1293 /* just try try 'array' or 'partition' based on this metadata */
1294 if (st->ss->add_to_super)
1295 return array_try_spare(devname, dfdp, pol, target, bare,
1296 st, verbose);
1297 else
1298 return partition_try_spare(devname, dfdp, pol,
1299 st, verbose);
1300 }
1301 /* No metadata was specified or found so options are open.
1302 * Check for whether any array metadata, or any partition metadata
1303 * might allow adding the spare. This check is just help to avoid
1304 * a more costly scan of all arrays when we can be sure that will
1305 * fail.
1306 */
1307 for (i = 0; (!arrays_ok || !partitions_ok) && superlist[i] ; i++) {
1308 if (superlist[i]->add_to_super && !arrays_ok &&
1309 policy_action_allows(pol, superlist[i]->name, act_spare))
1310 arrays_ok = 1;
1311 if (superlist[i]->add_to_super == NULL && !partitions_ok &&
1312 policy_action_allows(pol, superlist[i]->name, act_spare))
1313 partitions_ok = 1;
1314 }
1315 rv = 1;
1316 if (arrays_ok)
1317 rv = array_try_spare(devname, dfdp, pol, target, bare,
1318 st, verbose);
1319 if (rv != 0 && partitions_ok)
1320 rv = partition_try_spare(devname, dfdp, pol, st, verbose);
1321 return rv;
1322 }
1323
1324 int IncrementalScan(struct context *c, char *devnm)
1325 {
1326 /* look at every device listed in the 'map' file.
1327 * If one is found that is not running then:
1328 * look in mdadm.conf for bitmap file.
1329 * if one exists, but array has none, add it.
1330 * try to start array in auto-readonly mode
1331 */
1332 struct map_ent *mapl = NULL;
1333 struct map_ent *me;
1334 struct mddev_ident *devs, *mddev;
1335 int rv = 0;
1336 char container[32];
1337 char *only = NULL;
1338
1339 map_read(&mapl);
1340 devs = conf_get_ident(NULL);
1341
1342 restart:
1343 for (me = mapl ; me ; me = me->next) {
1344 mdu_array_info_t array;
1345 mdu_bitmap_file_t bmf;
1346 struct mdinfo *sra;
1347 int mdfd;
1348
1349 if (devnm && strcmp(devnm, me->devnm) != 0)
1350 continue;
1351 if (me->metadata[0] == '/') {
1352 char *sl;
1353
1354 if (!devnm)
1355 continue;
1356
1357 /* member array, need to work on container */
1358 strncpy(container, me->metadata+1, 32);
1359 container[31] = 0;
1360 sl = strchr(container, '/');
1361 if (sl)
1362 *sl = 0;
1363 only = devnm;
1364 devnm = container;
1365 goto restart;
1366 }
1367 mdfd = open_dev(me->devnm);
1368
1369 if (mdfd < 0)
1370 continue;
1371 if (!isdigit(me->metadata[0])) {
1372 /* must be a container */
1373 struct supertype *st = super_by_fd(mdfd, NULL);
1374 int ret = 0;
1375 struct map_ent *map = NULL;
1376
1377 if (st && st->ss->load_container)
1378 ret = st->ss->load_container(st, mdfd, NULL);
1379 close(mdfd);
1380 if (!ret && st && st->ss->container_content) {
1381 if (map_lock(&map))
1382 pr_err("failed to get exclusive lock on mapfile\n");
1383 ret = Incremental_container(st, me->path, c, only);
1384 map_unlock(&map);
1385 }
1386 if (ret)
1387 rv = 1;
1388 continue;
1389 }
1390 if (ioctl(mdfd, GET_ARRAY_INFO, &array) == 0 ||
1391 errno != ENODEV) {
1392 close(mdfd);
1393 continue;
1394 }
1395 /* Ok, we can try this one. Maybe it needs a bitmap */
1396 for (mddev = devs ; mddev ; mddev = mddev->next)
1397 if (mddev->devname && me->path
1398 && devname_matches(mddev->devname, me->path))
1399 break;
1400 if (mddev && mddev->bitmap_file) {
1401 /*
1402 * Note: early kernels will wrongly fail this, so it
1403 * is a hint only
1404 */
1405 int added = -1;
1406 if (ioctl(mdfd, GET_ARRAY_INFO, &bmf) < 0) {
1407 int bmfd = open(mddev->bitmap_file, O_RDWR);
1408 if (bmfd >= 0) {
1409 added = ioctl(mdfd, SET_BITMAP_FILE,
1410 bmfd);
1411 close(bmfd);
1412 }
1413 }
1414 if (c->verbose >= 0) {
1415 if (added == 0)
1416 pr_err("Added bitmap %s to %s\n",
1417 mddev->bitmap_file, me->path);
1418 else if (errno != EEXIST)
1419 pr_err("Failed to add bitmap to %s: %s\n",
1420 me->path, strerror(errno));
1421 }
1422 }
1423 /* FIXME check for reshape_active and consider not
1424 * starting array.
1425 */
1426 sra = sysfs_read(mdfd, NULL, 0);
1427 if (sra) {
1428 if (sysfs_set_str(sra, NULL,
1429 "array_state", "read-auto") == 0) {
1430 if (c->verbose >= 0)
1431 pr_err("started array %s\n",
1432 me->path ?: me->devnm);
1433 } else {
1434 pr_err("failed to start array %s: %s\n",
1435 me->path ?: me->devnm,
1436 strerror(errno));
1437 rv = 1;
1438 }
1439 sysfs_free(sra);
1440 }
1441 }
1442 return rv;
1443 }
1444
1445 static char *container2devname(char *devname)
1446 {
1447 char *mdname = NULL;
1448
1449 if (devname[0] == '/') {
1450 int fd = open(devname, O_RDONLY);
1451 if (fd >= 0) {
1452 mdname = xstrdup(fd2devnm(fd));
1453 close(fd);
1454 }
1455 } else {
1456 int uuid[4];
1457 struct map_ent *mp, *map = NULL;
1458
1459 if (!parse_uuid(devname, uuid))
1460 return mdname;
1461 mp = map_by_uuid(&map, uuid);
1462 if (mp)
1463 mdname = xstrdup(mp->devnm);
1464 map_free(map);
1465 }
1466
1467 return mdname;
1468 }
1469
1470 static int Incremental_container(struct supertype *st, char *devname,
1471 struct context *c, char *only)
1472 {
1473 /* Collect the contents of this container and for each
1474 * array, choose a device name and assemble the array.
1475 */
1476
1477 struct mdinfo *list;
1478 struct mdinfo *ra;
1479 struct map_ent *map = NULL;
1480 struct mdinfo info;
1481 int trustworthy;
1482 struct mddev_ident *match;
1483 int rv = 0;
1484 struct domainlist *domains;
1485 struct map_ent *smp;
1486 int suuid[4];
1487 int sfd;
1488 int ra_blocked = 0;
1489 int ra_all = 0;
1490 int result = 0;
1491
1492 st->ss->getinfo_super(st, &info, NULL);
1493
1494 if ((c->runstop > 0 && info.container_enough >= 0) ||
1495 info.container_enough > 0)
1496 /* pass */;
1497 else {
1498 if (c->export) {
1499 printf("MD_STARTED=no\n");
1500 } else if (c->verbose)
1501 pr_err("not enough devices to start the container\n");
1502 return 0;
1503 }
1504
1505 match = conf_match(st, &info, devname, c->verbose, &rv);
1506 if (match == NULL && rv == 2)
1507 return rv;
1508
1509 /* Need to compute 'trustworthy' */
1510 if (match)
1511 trustworthy = LOCAL;
1512 else if (st->ss->match_home(st, c->homehost) == 1)
1513 trustworthy = LOCAL;
1514 else if (st->ss->match_home(st, "any") == 1)
1515 trustworthy = LOCAL;
1516 else
1517 trustworthy = FOREIGN;
1518
1519 list = st->ss->container_content(st, NULL);
1520 /* when nothing to activate - quit */
1521 if (list == NULL) {
1522 if (c->export) {
1523 printf("MD_STARTED=nothing\n");
1524 }
1525 return 0;
1526 }
1527 for (ra = list ; ra ; ra = ra->next) {
1528 int mdfd;
1529 char chosen_name[1024];
1530 struct map_ent *mp;
1531 struct mddev_ident *match = NULL;
1532
1533 ra_all++;
1534 /* do not activate arrays blocked by metadata handler */
1535 if (ra->array.state & (1 << MD_SB_BLOCK_VOLUME)) {
1536 pr_err("Cannot activate array %s in %s.\n",
1537 ra->text_version, devname);
1538 ra_blocked++;
1539 continue;
1540 }
1541 mp = map_by_uuid(&map, ra->uuid);
1542
1543 if (mp) {
1544 mdfd = open_dev(mp->devnm);
1545 if (mp->path)
1546 strcpy(chosen_name, mp->path);
1547 else
1548 strcpy(chosen_name, mp->devnm);
1549 } else if (!only) {
1550
1551 /* Check in mdadm.conf for container == devname and
1552 * member == ra->text_version after second slash.
1553 */
1554 char *sub = strchr(ra->text_version+1, '/');
1555 struct mddev_ident *array_list;
1556 if (sub) {
1557 sub++;
1558 array_list = conf_get_ident(NULL);
1559 } else
1560 array_list = NULL;
1561 for(; array_list ; array_list = array_list->next) {
1562 char *dn;
1563 if (array_list->member == NULL ||
1564 array_list->container == NULL)
1565 continue;
1566 if (strcmp(array_list->member, sub) != 0)
1567 continue;
1568 if (array_list->uuid_set &&
1569 !same_uuid(ra->uuid, array_list->uuid, st->ss->swapuuid))
1570 continue;
1571 dn = container2devname(array_list->container);
1572 if (dn == NULL)
1573 continue;
1574 if (strncmp(dn, ra->text_version+1,
1575 strlen(dn)) != 0 ||
1576 ra->text_version[strlen(dn)+1] != '/') {
1577 free(dn);
1578 continue;
1579 }
1580 free(dn);
1581 /* we have a match */
1582 match = array_list;
1583 if (c->verbose>0)
1584 pr_err("match found for member %s\n",
1585 array_list->member);
1586 break;
1587 }
1588
1589 if (match && match->devname &&
1590 strcasecmp(match->devname, "<ignore>") == 0) {
1591 if (c->verbose > 0)
1592 pr_err("array %s/%s is explicitly ignored by mdadm.conf\n",
1593 match->container, match->member);
1594 continue;
1595 }
1596 if (match)
1597 trustworthy = LOCAL;
1598
1599 mdfd = create_mddev(match ? match->devname : NULL,
1600 ra->name,
1601 c->autof,
1602 trustworthy,
1603 chosen_name);
1604 }
1605 if (only && (!mp || strcmp(mp->devnm, only) != 0))
1606 continue;
1607
1608 if (mdfd < 0) {
1609 pr_err("failed to open %s: %s.\n",
1610 chosen_name, strerror(errno));
1611 return 2;
1612 }
1613
1614 assemble_container_content(st, mdfd, ra, c,
1615 chosen_name, &result);
1616 close(mdfd);
1617 }
1618 if (c->export && result) {
1619 char sep = '=';
1620 printf("MD_STARTED");
1621 if (result & INCR_NO) {
1622 printf("%cno", sep);
1623 sep = ',';
1624 }
1625 if (result & INCR_UNSAFE) {
1626 printf("%cunsafe", sep);
1627 sep = ',';
1628 }
1629 if (result & INCR_ALREADY) {
1630 printf("%calready", sep);
1631 sep = ',';
1632 }
1633 if (result & INCR_YES) {
1634 printf("%cyes", sep);
1635 sep = ',';
1636 }
1637 printf("\n");
1638 }
1639
1640 /* don't move spares to container with volume being activated
1641 when all volumes are blocked */
1642 if (ra_all == ra_blocked)
1643 return 0;
1644
1645 /* Now move all suitable spares from spare container */
1646 domains = domain_from_array(list, st->ss->name);
1647 memcpy(suuid, uuid_zero, sizeof(int[4]));
1648 if (domains &&
1649 (smp = map_by_uuid(&map, suuid)) != NULL &&
1650 (sfd = open(smp->path, O_RDONLY)) >= 0) {
1651 /* spare container found */
1652 struct supertype *sst =
1653 super_imsm.match_metadata_desc("imsm");
1654 struct mdinfo *sinfo;
1655 unsigned long long min_size = 0;
1656 if (st->ss->min_acceptable_spare_size)
1657 min_size = st->ss->min_acceptable_spare_size(st);
1658 if (!sst->ss->load_container(sst, sfd, NULL)) {
1659 close(sfd);
1660 sinfo = container_choose_spares(sst, min_size,
1661 domains, NULL,
1662 st->ss->name, 0);
1663 sst->ss->free_super(sst);
1664 if (sinfo){
1665 int count = 0;
1666 struct mdinfo *disks = sinfo->devs;
1667 while (disks) {
1668 /* move spare from spare
1669 * container to currently
1670 * assembled one
1671 */
1672 if (move_spare(
1673 smp->path,
1674 devname,
1675 makedev(disks->disk.major,
1676 disks->disk.minor)))
1677 count++;
1678 disks = disks->next;
1679 }
1680 if (count)
1681 pr_err("Added %d spare%s to %s\n",
1682 count, count>1?"s":"", devname);
1683 }
1684 sysfs_free(sinfo);
1685 } else
1686 close(sfd);
1687 }
1688 domain_free(domains);
1689 return 0;
1690 }
1691
1692 static void run_udisks(char *arg1, char *arg2)
1693 {
1694 int pid = fork();
1695 int status;
1696 if (pid == 0) {
1697 execl("/usr/bin/udisks", "udisks", arg1, arg2, NULL);
1698 execl("/bin/udisks", "udisks", arg1, arg2, NULL);
1699 exit(1);
1700 }
1701 while (pid > 0 && wait(&status) != pid)
1702 ;
1703 }
1704
1705 /*
1706 * IncrementalRemove - Attempt to see if the passed in device belongs to any
1707 * raid arrays, and if so first fail (if needed) and then remove the device.
1708 *
1709 * @devname - The device we want to remove
1710 * @id_path - name as found in /dev/disk/by-path for this device
1711 *
1712 * Note: the device name must be a kernel name like "sda", so
1713 * that we can find it in /proc/mdstat
1714 */
1715 int IncrementalRemove(char *devname, char *id_path, int verbose)
1716 {
1717 int mdfd;
1718 int rv = 0;
1719 struct mdstat_ent *ent;
1720 struct mddev_dev devlist;
1721 struct mdinfo mdi;
1722 char buf[32];
1723
1724 if (!id_path)
1725 dprintf("incremental removal without --path <id_path> lacks the possibility to re-add new device in this port\n");
1726
1727 if (strchr(devname, '/')) {
1728 pr_err("incremental removal requires a kernel device name, not a file: %s\n", devname);
1729 return 1;
1730 }
1731 ent = mdstat_by_component(devname);
1732 if (!ent) {
1733 if (verbose >= 0)
1734 pr_err("%s does not appear to be a component of any array\n", devname);
1735 return 1;
1736 }
1737 sysfs_init(&mdi, -1, ent->devnm);
1738 mdfd = open_dev_excl(ent->devnm);
1739 if (mdfd > 0) {
1740 close(mdfd);
1741 if (sysfs_get_str(&mdi, NULL, "array_state",
1742 buf, sizeof(buf)) > 0) {
1743 if (strncmp(buf, "active", 6) == 0 ||
1744 strncmp(buf, "clean", 5) == 0)
1745 sysfs_set_str(&mdi, NULL,
1746 "array_state", "read-auto");
1747 }
1748 }
1749 mdfd = open_dev(ent->devnm);
1750 if (mdfd < 0) {
1751 if (verbose >= 0)
1752 pr_err("Cannot open array %s!!\n", ent->devnm);
1753 free_mdstat(ent);
1754 return 1;
1755 }
1756
1757 if (id_path) {
1758 struct map_ent *map = NULL, *me;
1759 me = map_by_devnm(&map, ent->devnm);
1760 if (me)
1761 policy_save_path(id_path, me);
1762 map_free(map);
1763 }
1764
1765 memset(&devlist, 0, sizeof(devlist));
1766 devlist.devname = devname;
1767 devlist.disposition = 'f';
1768 /* for a container, we must fail each member array */
1769 if (ent->metadata_version &&
1770 strncmp(ent->metadata_version, "external:", 9) == 0) {
1771 struct mdstat_ent *mdstat = mdstat_read(0, 0);
1772 struct mdstat_ent *memb;
1773 for (memb = mdstat ; memb ; memb = memb->next)
1774 if (is_container_member(memb, ent->devnm)) {
1775 int subfd = open_dev(memb->devnm);
1776 if (subfd >= 0) {
1777 rv |= Manage_subdevs(
1778 memb->devnm, subfd,
1779 &devlist, verbose, 0,
1780 NULL, 0);
1781 close(subfd);
1782 }
1783 }
1784 free_mdstat(mdstat);
1785 } else
1786 rv |= Manage_subdevs(ent->devnm, mdfd, &devlist,
1787 verbose, 0, NULL, 0);
1788 if (rv & 2) {
1789 /* Failed due to EBUSY, try to stop the array.
1790 * Give udisks a chance to unmount it first.
1791 */
1792 int devid = devnm2devid(ent->devnm);
1793 run_udisks("--unmount", map_dev(major(devid),minor(devid), 0));
1794 rv = Manage_stop(ent->devnm, mdfd, verbose, 1);
1795 if (rv)
1796 /* At least we can try to trigger a 'remove' */
1797 sysfs_uevent(&mdi, "remove");
1798 if (verbose) {
1799 if (rv)
1800 pr_err("Fail to stop %s too.\n", ent->devnm);
1801 }
1802 } else {
1803 devlist.disposition = 'r';
1804 rv = Manage_subdevs(ent->devnm, mdfd, &devlist,
1805 verbose, 0, NULL, 0);
1806 }
1807 close(mdfd);
1808 free_mdstat(ent);
1809 return rv;
1810 }