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1 /*
2 * mdadm - manage Linux "md" devices aka RAID arrays.
3 *
4 * Copyright (C) 2001-2016 Neil Brown <neilb@suse.com>
5 *
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 *
21 * Author: Neil Brown
22 * Email: <neilb@suse.de>
23 */
24
25 #include "mdadm.h"
26 #include <ctype.h>
27
28 static int name_matches(char *found, char *required, char *homehost, int require_homehost)
29 {
30 /* See if the name found matches the required name, possibly
31 * prefixed with 'homehost'
32 */
33 char *sep;
34 unsigned int l;
35
36 if (strcmp(found, required)==0)
37 return 1;
38 sep = strchr(found, ':');
39 if (!sep)
40 return 0;
41 l = sep - found;
42 if (strncmp(found, "any:", 4) == 0 ||
43 (homehost && strcmp(homehost, "any") == 0) ||
44 !require_homehost ||
45 (homehost && strlen(homehost) == l &&
46 strncmp(found, homehost, l) == 0)) {
47 /* matching homehost */
48 if (strcmp(sep+1, required) == 0)
49 return 1;
50 }
51 return 0;
52 }
53
54 static int is_member_busy(char *metadata_version)
55 {
56 /* check if the given member array is active */
57 struct mdstat_ent *mdstat = mdstat_read(0, 0);
58 struct mdstat_ent *ent;
59 int busy = 0;
60
61 for (ent = mdstat; ent; ent = ent->next) {
62 if (ent->metadata_version == NULL)
63 continue;
64 if (strncmp(ent->metadata_version, "external:", 9) != 0)
65 continue;
66 if (!is_subarray(&ent->metadata_version[9]))
67 continue;
68 /* Skip first char - it can be '/' or '-' */
69 if (strcmp(&ent->metadata_version[10], metadata_version+1) == 0) {
70 busy = 1;
71 break;
72 }
73 }
74 free_mdstat(mdstat);
75
76 return busy;
77 }
78
79 static int ident_matches(struct mddev_ident *ident,
80 struct mdinfo *content,
81 struct supertype *tst,
82 char *homehost, int require_homehost,
83 char *update, char *devname)
84 {
85
86 if (ident->uuid_set && (!update || strcmp(update, "uuid")!= 0) &&
87 same_uuid(content->uuid, ident->uuid, tst->ss->swapuuid)==0 &&
88 memcmp(content->uuid, uuid_zero, sizeof(int[4])) != 0) {
89 if (devname)
90 pr_err("%s has wrong uuid.\n", devname);
91 return 0;
92 }
93 if (ident->name[0] && (!update || strcmp(update, "name")!= 0) &&
94 name_matches(content->name, ident->name, homehost, require_homehost)==0) {
95 if (devname)
96 pr_err("%s has wrong name.\n", devname);
97 return 0;
98 }
99 if (ident->super_minor != UnSet &&
100 ident->super_minor != content->array.md_minor) {
101 if (devname)
102 pr_err("%s has wrong super-minor.\n",
103 devname);
104 return 0;
105 }
106 if (ident->level != UnSet &&
107 ident->level != content->array.level) {
108 if (devname)
109 pr_err("%s has wrong raid level.\n",
110 devname);
111 return 0;
112 }
113 if (ident->raid_disks != UnSet &&
114 content->array.raid_disks != 0 && /* metadata doesn't know how many to expect */
115 ident->raid_disks!= content->array.raid_disks) {
116 if (devname)
117 pr_err("%s requires wrong number of drives.\n",
118 devname);
119 return 0;
120 }
121 if (ident->member && ident->member[0]) {
122 /* content->text_version must match */
123 char *s = strchr(content->text_version+1, '/');
124 if (s == NULL) {
125 if (devname)
126 pr_err("%s is not a container and one is required.\n",
127 devname);
128 return 0;
129 } else if (strcmp(ident->member, s+1) != 0) {
130 if (devname)
131 pr_err("skipping wrong member %s is %s\n",
132 content->text_version, devname);
133 return 0;
134 }
135 }
136 return 1;
137 }
138
139 static int select_devices(struct mddev_dev *devlist,
140 struct mddev_ident *ident,
141 struct supertype **stp,
142 struct mdinfo **contentp,
143 struct context *c,
144 int inargv, int auto_assem)
145 {
146 struct mddev_dev *tmpdev;
147 int num_devs;
148 struct supertype *st = *stp;
149 struct mdinfo *content = NULL;
150 int report_mismatch = ((inargv && c->verbose >= 0) || c->verbose > 0);
151 struct domainlist *domains = NULL;
152
153 tmpdev = devlist; num_devs = 0;
154 while (tmpdev) {
155 if (tmpdev->used)
156 tmpdev->used = 2;
157 else
158 num_devs++;
159 tmpdev->disposition = 0;
160 tmpdev = tmpdev->next;
161 }
162
163 /* first walk the list of devices to find a consistent set
164 * that match the criterea, if that is possible.
165 * We flag the ones we like with 'used'.
166 */
167 for (tmpdev = devlist;
168 tmpdev;
169 tmpdev = tmpdev ? tmpdev->next : NULL) {
170 char *devname = tmpdev->devname;
171 int dfd;
172 struct stat stb;
173 struct supertype *tst;
174 struct dev_policy *pol = NULL;
175 int found_container = 0;
176
177 if (tmpdev->used > 1)
178 continue;
179
180 if (ident->container) {
181 if (ident->container[0] == '/' &&
182 !same_dev(ident->container, devname)) {
183 if (report_mismatch)
184 pr_err("%s is not the container required (%s)\n",
185 devname, ident->container);
186 continue;
187 }
188 } else if (ident->devices &&
189 !match_oneof(ident->devices, devname)) {
190 /* Note that we ignore the "device=" identifier if a
191 * "container=" is given. Checking both is unnecessarily
192 * complicated.
193 */
194 if (report_mismatch)
195 pr_err("%s is not one of %s\n", devname, ident->devices);
196 continue;
197 }
198
199 tst = dup_super(st);
200
201 dfd = dev_open(devname, O_RDONLY);
202 if (dfd < 0) {
203 if (report_mismatch)
204 pr_err("cannot open device %s: %s\n",
205 devname, strerror(errno));
206 tmpdev->used = 2;
207 } else if (fstat(dfd, &stb)< 0) {
208 /* Impossible! */
209 pr_err("fstat failed for %s: %s\n",
210 devname, strerror(errno));
211 tmpdev->used = 2;
212 } else if ((stb.st_mode & S_IFMT) != S_IFBLK) {
213 pr_err("%s is not a block device.\n",
214 devname);
215 tmpdev->used = 2;
216 } else if (must_be_container(dfd)) {
217 if (st) {
218 /* already found some components, this cannot
219 * be another one.
220 */
221 if (report_mismatch)
222 pr_err("%s is a container, but we are looking for components\n",
223 devname);
224 tmpdev->used = 2;
225 } if (!tst && (tst = super_by_fd(dfd, NULL)) == NULL) {
226 if (report_mismatch)
227 pr_err("not a recognisable container: %s\n",
228 devname);
229 tmpdev->used = 2;
230 } else if (!tst->ss->load_container
231 || tst->ss->load_container(tst, dfd, NULL)) {
232 if (report_mismatch)
233 pr_err("no correct container type: %s\n",
234 devname);
235 tmpdev->used = 2;
236 } else if (auto_assem &&
237 !conf_test_metadata(tst->ss->name, (pol = devid_policy(stb.st_rdev)),
238 tst->ss->match_home(tst, c->homehost) == 1)) {
239 if (report_mismatch)
240 pr_err("%s has metadata type %s for which auto-assembly is disabled\n",
241 devname, tst->ss->name);
242 tmpdev->used = 2;
243 } else
244 found_container = 1;
245 } else {
246 if (!tst && (tst = guess_super(dfd)) == NULL) {
247 if (report_mismatch)
248 pr_err("no recogniseable superblock on %s\n",
249 devname);
250 tmpdev->used = 2;
251 } else if ((tst->ignore_hw_compat = 0),
252 tst->ss->load_super(tst, dfd,
253 report_mismatch ? devname : NULL)) {
254 if (report_mismatch)
255 pr_err("no RAID superblock on %s\n",
256 devname);
257 tmpdev->used = 2;
258 } else if (tst->ss->compare_super == NULL) {
259 if (report_mismatch)
260 pr_err("Cannot assemble %s metadata on %s\n",
261 tst->ss->name, devname);
262 tmpdev->used = 2;
263 } else if (auto_assem && st == NULL &&
264 !conf_test_metadata(tst->ss->name, (pol = devid_policy(stb.st_rdev)),
265 tst->ss->match_home(tst, c->homehost) == 1)) {
266 if (report_mismatch)
267 pr_err("%s has metadata type %s for which auto-assembly is disabled\n",
268 devname, tst->ss->name);
269 tmpdev->used = 2;
270 }
271 }
272 if (dfd >= 0) close(dfd);
273 if (tmpdev->used == 2) {
274 if (auto_assem || !inargv)
275 /* Ignore unrecognised devices during auto-assembly */
276 goto loop;
277 if (ident->uuid_set || ident->name[0] ||
278 ident->super_minor != UnSet)
279 /* Ignore unrecognised device if looking for
280 * specific array */
281 goto loop;
282
283 pr_err("%s has no superblock - assembly aborted\n",
284 devname);
285 if (st)
286 st->ss->free_super(st);
287 dev_policy_free(pol);
288 domain_free(domains);
289 return -1;
290 }
291
292 if (found_container) {
293 /* tmpdev is a container. We need to be either
294 * looking for a member, or auto-assembling
295 */
296 /* should be safe to try an exclusive open now, we
297 * have rejected anything that some other mdadm might
298 * be looking at
299 */
300 dfd = dev_open(devname, O_RDONLY | O_EXCL);
301 if (dfd < 0) {
302 if (report_mismatch)
303 pr_err("%s is busy - skipping\n", devname);
304 goto loop;
305 }
306 close(dfd);
307
308 if (ident->container && ident->container[0] != '/') {
309 /* we have a uuid */
310 int uuid[4];
311
312 content = *contentp;
313 tst->ss->getinfo_super(tst, content, NULL);
314
315 if (!parse_uuid(ident->container, uuid) ||
316 !same_uuid(content->uuid, uuid, tst->ss->swapuuid)) {
317 if (report_mismatch)
318 pr_err("%s has wrong UUID to be required container\n",
319 devname);
320 goto loop;
321 }
322 }
323 /* It is worth looking inside this container.
324 */
325 if (c->verbose > 0)
326 pr_err("looking in container %s\n",
327 devname);
328
329 for (content = tst->ss->container_content(tst, NULL);
330 content;
331 content = content->next) {
332
333 if (!ident_matches(ident, content, tst,
334 c->homehost, c->require_homehost,
335 c->update,
336 report_mismatch ? devname : NULL))
337 /* message already printed */;
338 else if (is_member_busy(content->text_version)) {
339 if (report_mismatch)
340 pr_err("member %s in %s is already assembled\n",
341 content->text_version,
342 devname);
343 } else if (content->array.state & (1<<MD_SB_BLOCK_VOLUME)) {
344 /* do not assemble arrays with unsupported configurations */
345 pr_err("Cannot activate member %s in %s.\n",
346 content->text_version,
347 devname);
348 } else
349 break;
350 }
351 if (!content) {
352 tmpdev->used = 2;
353 goto loop; /* empty container */
354 }
355
356 st = tst; tst = NULL;
357 if (!auto_assem && inargv && tmpdev->next != NULL) {
358 pr_err("%s is a container, but is not only device given: confused and aborting\n",
359 devname);
360 st->ss->free_super(st);
361 dev_policy_free(pol);
362 domain_free(domains);
363 return -1;
364 }
365 if (c->verbose > 0)
366 pr_err("found match on member %s in %s\n",
367 content->text_version, devname);
368
369 /* make sure we finished the loop */
370 tmpdev = NULL;
371 goto loop;
372 } else {
373 content = *contentp;
374 tst->ss->getinfo_super(tst, content, NULL);
375
376 if (!ident_matches(ident, content, tst,
377 c->homehost, c->require_homehost,
378 c->update,
379 report_mismatch ? devname : NULL))
380 goto loop;
381
382 if (auto_assem) {
383 /* Never auto-assemble things that conflict
384 * with mdadm.conf in some way
385 */
386 struct mddev_ident *match;
387 int rv = 0;
388
389 match = conf_match(tst, content, devname,
390 report_mismatch ? c->verbose : -1,
391 &rv);
392 if (!match && rv == 2)
393 goto loop;
394 if (match && match->devname &&
395 strcasecmp(match->devname, "<ignore>") == 0) {
396 if (report_mismatch)
397 pr_err("%s is a member of an explicitly ignored array\n",
398 devname);
399 goto loop;
400 }
401 if (match && !ident_matches(match, content, tst,
402 c->homehost, c->require_homehost,
403 c->update,
404 report_mismatch ? devname : NULL))
405 /* Array exists in mdadm.conf but some
406 * details don't match, so reject it
407 */
408 goto loop;
409 }
410
411 /* should be safe to try an exclusive open now, we
412 * have rejected anything that some other mdadm might
413 * be looking at
414 */
415 dfd = dev_open(devname, O_RDONLY | O_EXCL);
416 if (dfd < 0) {
417 if (report_mismatch)
418 pr_err("%s is busy - skipping\n", devname);
419 goto loop;
420 }
421 close(dfd);
422
423 if (st == NULL)
424 st = dup_super(tst);
425 if (st->minor_version == -1)
426 st->minor_version = tst->minor_version;
427
428 if (memcmp(content->uuid, uuid_zero,
429 sizeof(int[4])) == 0) {
430 /* this is a floating spare. It cannot define
431 * an array unless there are no more arrays of
432 * this type to be found. It can be included
433 * in an array of this type though.
434 */
435 tmpdev->used = 3;
436 goto loop;
437 }
438
439 if (st->ss != tst->ss ||
440 st->minor_version != tst->minor_version ||
441 st->ss->compare_super(st, tst) != 0) {
442 /* Some mismatch. If exactly one array matches this host,
443 * we can resolve on that one.
444 * Or, if we are auto assembling, we just ignore the second
445 * for now.
446 */
447 if (auto_assem)
448 goto loop;
449 if (c->homehost) {
450 int first = st->ss->match_home(st, c->homehost);
451 int last = tst->ss->match_home(tst, c->homehost);
452 if (first != last &&
453 (first == 1 || last == 1)) {
454 /* We can do something */
455 if (first) {/* just ignore this one */
456 if (report_mismatch)
457 pr_err("%s misses out due to wrong homehost\n",
458 devname);
459 goto loop;
460 } else { /* reject all those sofar */
461 struct mddev_dev *td;
462 if (report_mismatch)
463 pr_err("%s overrides previous devices due to good homehost\n",
464 devname);
465 for (td=devlist; td != tmpdev; td=td->next)
466 if (td->used == 1)
467 td->used = 0;
468 tmpdev->used = 1;
469 goto loop;
470 }
471 }
472 }
473 pr_err("superblock on %s doesn't match others - assembly aborted\n",
474 devname);
475 tst->ss->free_super(tst);
476 st->ss->free_super(st);
477 dev_policy_free(pol);
478 domain_free(domains);
479 return -1;
480 }
481 tmpdev->used = 1;
482 }
483 loop:
484 /* Collect domain information from members only */
485 if (tmpdev && tmpdev->used == 1) {
486 if (!pol)
487 pol = devid_policy(stb.st_rdev);
488 domain_merge(&domains, pol, tst?tst->ss->name:NULL);
489 }
490 dev_policy_free(pol);
491 pol = NULL;
492 if (tst)
493 tst->ss->free_super(tst);
494 }
495
496 /* Check if we found some imsm spares but no members */
497 if ((auto_assem ||
498 (ident->uuid_set &&
499 memcmp(uuid_zero, ident->uuid,sizeof(uuid_zero)) == 0)) &&
500 (!st || !st->sb))
501 for (tmpdev = devlist; tmpdev; tmpdev = tmpdev->next) {
502 if (tmpdev->used != 3)
503 continue;
504 tmpdev->used = 1;
505 content = *contentp;
506
507 if (!st->sb) {
508 /* we need sb from one of the spares */
509 int dfd = dev_open(tmpdev->devname, O_RDONLY);
510 if (dfd < 0 ||
511 st->ss->load_super(st, dfd, NULL))
512 tmpdev->used = 2;
513 if (dfd > 0)
514 close(dfd);
515 }
516 }
517
518 /* Now reject spares that don't match domains of identified members */
519 for (tmpdev = devlist; tmpdev; tmpdev = tmpdev->next) {
520 struct stat stb;
521 if (tmpdev->used != 3)
522 continue;
523 if (stat(tmpdev->devname, &stb)< 0) {
524 pr_err("fstat failed for %s: %s\n",
525 tmpdev->devname, strerror(errno));
526 tmpdev->used = 2;
527 } else {
528 struct dev_policy *pol = devid_policy(stb.st_rdev);
529 int dt = domain_test(domains, pol, NULL);
530 if (inargv && dt != 0)
531 /* take this spare as domains match
532 * if there are any */
533 tmpdev->used = 1;
534 else if (!inargv && dt == 1)
535 /* device wasn't explicitly listed, so need
536 * explicit domain match - which we have */
537 tmpdev->used = 1;
538 else
539 /* if domains don't match mark as unused */
540 tmpdev->used = 0;
541 dev_policy_free(pol);
542 }
543 }
544 domain_free(domains);
545 *stp = st;
546 if (st && st->sb && content == *contentp)
547 st->ss->getinfo_super(st, content, NULL);
548 *contentp = content;
549
550 return num_devs;
551 }
552
553 struct devs {
554 char *devname;
555 int uptodate; /* set once we decide that this device is as
556 * recent as everything else in the array.
557 */
558 int included; /* set if the device is already in the array
559 * due to a previous '-I'
560 */
561 struct mdinfo i;
562 };
563
564 static int load_devices(struct devs *devices, char *devmap,
565 struct mddev_ident *ident, struct supertype **stp,
566 struct mddev_dev *devlist, struct context *c,
567 struct mdinfo *content,
568 int mdfd, char *mddev,
569 int *most_recentp, int *bestcntp, int **bestp,
570 int inargv)
571 {
572 struct mddev_dev *tmpdev;
573 int devcnt = 0;
574 int nextspare = 0;
575 int bitmap_done = 0;
576 int most_recent = -1;
577 int bestcnt = 0;
578 int *best = *bestp;
579 struct supertype *st = *stp;
580
581 for (tmpdev = devlist; tmpdev; tmpdev=tmpdev->next) {
582 char *devname = tmpdev->devname;
583 struct stat stb;
584 struct supertype *tst;
585 int i;
586 int dfd;
587
588 if (tmpdev->used != 1)
589 continue;
590 /* looks like a good enough match to update the super block if needed */
591 if (c->update) {
592 /* prepare useful information in info structures */
593 struct stat stb2;
594 int err;
595 fstat(mdfd, &stb2);
596
597 if (strcmp(c->update, "uuid") == 0 && !ident->uuid_set)
598 random_uuid((__u8 *)ident->uuid);
599
600 if (strcmp(c->update, "ppl") == 0 &&
601 ident->bitmap_fd >= 0) {
602 pr_err("PPL is not compatible with bitmap\n");
603 return -1;
604 }
605
606 dfd = dev_open(devname,
607 tmpdev->disposition == 'I'
608 ? O_RDWR : (O_RDWR|O_EXCL));
609
610 tst = dup_super(st);
611 if (dfd < 0 || tst->ss->load_super(tst, dfd, NULL) != 0) {
612 pr_err("cannot re-read metadata from %s - aborting\n",
613 devname);
614 if (dfd >= 0)
615 close(dfd);
616 close(mdfd);
617 free(devices);
618 free(devmap);
619 tst->ss->free_super(tst);
620 free(tst);
621 *stp = st;
622 return -1;
623 }
624 tst->ss->getinfo_super(tst, content, devmap + devcnt * content->array.raid_disks);
625
626 memcpy(content->uuid, ident->uuid, 16);
627 strcpy(content->name, ident->name);
628 content->array.md_minor = minor(stb2.st_rdev);
629
630 if (strcmp(c->update, "byteorder") == 0)
631 err = 0;
632 else if (strcmp(c->update, "home-cluster") == 0) {
633 tst->cluster_name = c->homecluster;
634 err = tst->ss->write_bitmap(tst, dfd, NameUpdate);
635 } else if (strcmp(c->update, "nodes") == 0) {
636 tst->nodes = c->nodes;
637 err = tst->ss->write_bitmap(tst, dfd, NodeNumUpdate);
638 } else if (strcmp(c->update, "revert-reshape") == 0 &&
639 c->invalid_backup)
640 err = tst->ss->update_super(tst, content,
641 "revert-reshape-nobackup",
642 devname, c->verbose,
643 ident->uuid_set,
644 c->homehost);
645 else
646 err = tst->ss->update_super(tst, content, c->update,
647 devname, c->verbose,
648 ident->uuid_set,
649 c->homehost);
650 if (err < 0) {
651 if (err == -1)
652 pr_err("--update=%s not understood for %s metadata\n",
653 c->update, tst->ss->name);
654 tst->ss->free_super(tst);
655 free(tst);
656 close(mdfd);
657 close(dfd);
658 free(devices);
659 free(devmap);
660 *stp = st;
661 return -1;
662 }
663 if (strcmp(c->update, "uuid")==0 &&
664 !ident->uuid_set) {
665 ident->uuid_set = 1;
666 memcpy(ident->uuid, content->uuid, 16);
667 }
668 if (tst->ss->store_super(tst, dfd))
669 pr_err("Could not re-write superblock on %s.\n",
670 devname);
671
672 if (strcmp(c->update, "uuid")==0 &&
673 ident->bitmap_fd >= 0 && !bitmap_done) {
674 if (bitmap_update_uuid(ident->bitmap_fd,
675 content->uuid,
676 tst->ss->swapuuid) != 0)
677 pr_err("Could not update uuid on external bitmap.\n");
678 else
679 bitmap_done = 1;
680 }
681 } else {
682 dfd = dev_open(devname,
683 tmpdev->disposition == 'I'
684 ? O_RDWR : (O_RDWR|O_EXCL));
685 tst = dup_super(st);
686
687 if (dfd < 0 || tst->ss->load_super(tst, dfd, NULL) != 0) {
688 pr_err("cannot re-read metadata from %s - aborting\n",
689 devname);
690 if (dfd >= 0)
691 close(dfd);
692 close(mdfd);
693 free(devices);
694 free(devmap);
695 tst->ss->free_super(tst);
696 free(tst);
697 *stp = st;
698 return -1;
699 }
700 tst->ss->getinfo_super(tst, content, devmap + devcnt * content->array.raid_disks);
701 }
702
703 fstat(dfd, &stb);
704 close(dfd);
705
706 if (c->verbose > 0)
707 pr_err("%s is identified as a member of %s, slot %d%s.\n",
708 devname, mddev, content->disk.raid_disk,
709 (content->disk.state & (1<<MD_DISK_REPLACEMENT)) ? " replacement":"");
710 devices[devcnt].devname = devname;
711 devices[devcnt].uptodate = 0;
712 devices[devcnt].included = (tmpdev->disposition == 'I');
713 devices[devcnt].i = *content;
714 devices[devcnt].i.disk.major = major(stb.st_rdev);
715 devices[devcnt].i.disk.minor = minor(stb.st_rdev);
716
717 if (devices[devcnt].i.disk.state == 6) {
718 if (most_recent < 0 ||
719 devices[devcnt].i.events
720 > devices[most_recent].i.events) {
721 struct supertype *tmp = tst;
722 tst = st;
723 st = tmp;
724 most_recent = devcnt;
725 }
726 }
727 tst->ss->free_super(tst);
728 free(tst);
729
730 if (content->array.level == LEVEL_MULTIPATH)
731 /* with multipath, the raid_disk from the superblock is meaningless */
732 i = devcnt;
733 else
734 i = devices[devcnt].i.disk.raid_disk;
735 if (i+1 == 0 || i == MD_DISK_ROLE_JOURNAL) {
736 if (nextspare < content->array.raid_disks*2)
737 nextspare = content->array.raid_disks*2;
738 i = nextspare++;
739 } else {
740 /* i is raid_disk - double it so there is room for
741 * replacements */
742 i *= 2;
743 if (devices[devcnt].i.disk.state & (1<<MD_DISK_REPLACEMENT))
744 i++;
745 if (i >= content->array.raid_disks*2 &&
746 i >= nextspare)
747 nextspare = i+1;
748 }
749 if (i < 10000) {
750 if (i >= bestcnt) {
751 int newbestcnt = i+10;
752 int *newbest = xmalloc(sizeof(int)*newbestcnt);
753 int c;
754 for (c=0; c < newbestcnt; c++)
755 if (c < bestcnt)
756 newbest[c] = best[c];
757 else
758 newbest[c] = -1;
759 if (best)free(best);
760 best = newbest;
761 bestcnt = newbestcnt;
762 }
763 if (best[i] >=0 &&
764 devices[best[i]].i.events
765 == devices[devcnt].i.events
766 && (devices[best[i]].i.disk.minor
767 != devices[devcnt].i.disk.minor)
768 && st->ss == &super0
769 && content->array.level != LEVEL_MULTIPATH) {
770 /* two different devices with identical superblock.
771 * Could be a mis-detection caused by overlapping
772 * partitions. fail-safe.
773 */
774 pr_err("WARNING %s and %s appear to have very similar superblocks.\n"
775 " If they are really different, please --zero the superblock on one\n"
776 " If they are the same or overlap, please remove one from %s.\n",
777 devices[best[i]].devname, devname,
778 inargv ? "the list" :
779 "the\n DEVICE list in mdadm.conf"
780 );
781 close(mdfd);
782 free(devices);
783 free(devmap);
784 *stp = st;
785 return -1;
786 }
787 if (best[i] == -1
788 || (devices[best[i]].i.events
789 < devices[devcnt].i.events))
790 best[i] = devcnt;
791 }
792 devcnt++;
793 }
794 if (most_recent >= 0)
795 *most_recentp = most_recent;
796 *bestcntp = bestcnt;
797 *bestp = best;
798 *stp = st;
799 return devcnt;
800 }
801
802 static int force_array(struct mdinfo *content,
803 struct devs *devices,
804 int *best, int bestcnt, char *avail,
805 int most_recent,
806 struct supertype *st,
807 struct context *c)
808 {
809 int okcnt = 0;
810 while (!enough(content->array.level, content->array.raid_disks,
811 content->array.layout, 1,
812 avail)
813 ||
814 (content->reshape_active && content->delta_disks > 0 &&
815 !enough(content->array.level, (content->array.raid_disks
816 - content->delta_disks),
817 content->new_layout, 1,
818 avail)
819 )) {
820 /* Choose the newest best drive which is
821 * not up-to-date, update the superblock
822 * and add it.
823 */
824 int fd;
825 struct supertype *tst;
826 unsigned long long current_events;
827 int chosen_drive = -1;
828 int i;
829
830 for (i = 0;
831 i < content->array.raid_disks * 2 && i < bestcnt;
832 i += 2) {
833 int j = best[i];
834 if (j < 0)
835 continue;
836 if (devices[j].uptodate)
837 continue;
838 if (devices[j].i.recovery_start != MaxSector) {
839 int delta;
840 if (!devices[j].i.reshape_active ||
841 devices[j].i.delta_disks <= 0)
842 continue;
843 /* When increasing number of devices, an
844 * added device also appears to be
845 * recovering. It is safe to include it
846 * as long as it won't be a source of
847 * data.
848 * For now, just allow for last data
849 * devices in RAID4 or last devices in RAID4/5/6.
850 */
851 delta = devices[j].i.delta_disks;
852 if (devices[j].i.array.level >= 4 &&
853 devices[j].i.array.level <= 6 &&
854 i/2 >= content->array.raid_disks - delta)
855 /* OK */;
856 else if (devices[j].i.array.level == 4 &&
857 i/2 >= content->array.raid_disks - delta - 1)
858 /* OK */;
859 else
860 continue;
861 }
862 if (chosen_drive < 0 ||
863 devices[j].i.events
864 > devices[chosen_drive].i.events)
865 chosen_drive = j;
866 }
867 if (chosen_drive < 0)
868 break;
869 current_events = devices[chosen_drive].i.events;
870 add_another:
871 if (c->verbose >= 0)
872 pr_err("forcing event count in %s(%d) from %d upto %d\n",
873 devices[chosen_drive].devname,
874 devices[chosen_drive].i.disk.raid_disk,
875 (int)(devices[chosen_drive].i.events),
876 (int)(devices[most_recent].i.events));
877 fd = dev_open(devices[chosen_drive].devname,
878 devices[chosen_drive].included ? O_RDWR
879 : (O_RDWR|O_EXCL));
880 if (fd < 0) {
881 pr_err("Couldn't open %s for write - not updating\n",
882 devices[chosen_drive].devname);
883 devices[chosen_drive].i.events = 0;
884 continue;
885 }
886 tst = dup_super(st);
887 if (tst->ss->load_super(tst,fd, NULL)) {
888 close(fd);
889 pr_err("RAID superblock disappeared from %s - not updating.\n",
890 devices[chosen_drive].devname);
891 devices[chosen_drive].i.events = 0;
892 continue;
893 }
894 content->events = devices[most_recent].i.events;
895 tst->ss->update_super(tst, content, "force-one",
896 devices[chosen_drive].devname, c->verbose,
897 0, NULL);
898
899 if (tst->ss->store_super(tst, fd)) {
900 close(fd);
901 pr_err("Could not re-write superblock on %s\n",
902 devices[chosen_drive].devname);
903 devices[chosen_drive].i.events = 0;
904 tst->ss->free_super(tst);
905 continue;
906 }
907 close(fd);
908 devices[chosen_drive].i.events = devices[most_recent].i.events;
909 devices[chosen_drive].uptodate = 1;
910 avail[chosen_drive] = 1;
911 okcnt++;
912 tst->ss->free_super(tst);
913 /* If there are any other drives of the same vintage,
914 * add them in as well. We can't lose and we might gain
915 */
916 for (i = 0;
917 i < content->array.raid_disks * 2 && i < bestcnt ;
918 i += 2) {
919 int j = best[i];
920 if (j >= 0 &&
921 !devices[j].uptodate &&
922 devices[j].i.recovery_start == MaxSector &&
923 devices[j].i.events == current_events) {
924 chosen_drive = j;
925 goto add_another;
926 }
927 }
928 }
929 return okcnt;
930 }
931
932 static int start_array(int mdfd,
933 char *mddev,
934 struct mdinfo *content,
935 struct supertype *st,
936 struct mddev_ident *ident,
937 int *best, int bestcnt,
938 int chosen_drive,
939 struct devs *devices,
940 unsigned int okcnt,
941 unsigned int sparecnt,
942 unsigned int rebuilding_cnt,
943 unsigned int journalcnt,
944 struct context *c,
945 int clean, char *avail,
946 int start_partial_ok,
947 int err_ok,
948 int was_forced
949 )
950 {
951 int rv;
952 int i;
953 unsigned int req_cnt;
954
955 if (content->journal_device_required && (content->journal_clean == 0)) {
956 if (!c->force) {
957 pr_err("Not safe to assemble with missing or stale journal device, consider --force.\n");
958 return 1;
959 }
960 pr_err("Journal is missing or stale, starting array read only.\n");
961 c->readonly = 1;
962 }
963
964 if (content->consistency_policy == CONSISTENCY_POLICY_PPL)
965 clean = 1;
966
967 rv = set_array_info(mdfd, st, content);
968 if (rv && !err_ok) {
969 pr_err("failed to set array info for %s: %s\n",
970 mddev, strerror(errno));
971 return 1;
972 }
973 if (ident->bitmap_fd >= 0) {
974 if (ioctl(mdfd, SET_BITMAP_FILE, ident->bitmap_fd) != 0) {
975 pr_err("SET_BITMAP_FILE failed.\n");
976 return 1;
977 }
978 } else if (ident->bitmap_file) {
979 /* From config file */
980 int bmfd = open(ident->bitmap_file, O_RDWR);
981 if (bmfd < 0) {
982 pr_err("Could not open bitmap file %s\n",
983 ident->bitmap_file);
984 return 1;
985 }
986 if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) {
987 pr_err("Failed to set bitmapfile for %s\n", mddev);
988 close(bmfd);
989 return 1;
990 }
991 close(bmfd);
992 }
993
994 /* First, add the raid disks, but add the chosen one last */
995 for (i=0; i<= bestcnt; i++) {
996 int j;
997 if (i < bestcnt) {
998 j = best[i];
999 if (j == chosen_drive)
1000 continue;
1001 } else
1002 j = chosen_drive;
1003
1004 if (j >= 0 && !devices[j].included) {
1005 int dfd = dev_open(devices[j].devname,
1006 O_RDWR|O_EXCL);
1007 if (dfd >= 0) {
1008 remove_partitions(dfd);
1009 close(dfd);
1010 }
1011 rv = add_disk(mdfd, st, content, &devices[j].i);
1012
1013 if (rv) {
1014 pr_err("failed to add %s to %s: %s\n",
1015 devices[j].devname,
1016 mddev,
1017 strerror(errno));
1018 if (i < content->array.raid_disks * 2
1019 || i == bestcnt)
1020 okcnt--;
1021 else
1022 sparecnt--;
1023 } else if (c->verbose > 0)
1024 pr_err("added %s to %s as %d%s%s\n",
1025 devices[j].devname, mddev,
1026 devices[j].i.disk.raid_disk,
1027 devices[j].uptodate?"":
1028 " (possibly out of date)",
1029 (devices[j].i.disk.state & (1<<MD_DISK_REPLACEMENT))?" replacement":"");
1030 } else if (j >= 0) {
1031 if (c->verbose > 0)
1032 pr_err("%s is already in %s as %d\n",
1033 devices[j].devname, mddev,
1034 devices[j].i.disk.raid_disk);
1035 } else if (c->verbose > 0 && i < content->array.raid_disks*2
1036 && (i&1) == 0)
1037 pr_err("no uptodate device for slot %d of %s\n",
1038 i/2, mddev);
1039 }
1040
1041 if (content->array.level == LEVEL_CONTAINER) {
1042 if (c->verbose >= 0) {
1043 pr_err("Container %s has been assembled with %d drive%s",
1044 mddev, okcnt+sparecnt+journalcnt,
1045 okcnt+sparecnt+journalcnt==1?"":"s");
1046 if (okcnt < (unsigned)content->array.raid_disks)
1047 fprintf(stderr, " (out of %d)",
1048 content->array.raid_disks);
1049 fprintf(stderr, "\n");
1050 }
1051
1052 if (st->ss->validate_container) {
1053 struct mdinfo *devices_list;
1054 struct mdinfo *info_devices = xmalloc(sizeof(struct mdinfo)*(okcnt+sparecnt));
1055 unsigned int count;
1056 devices_list = NULL;
1057 for (count = 0; count < okcnt+sparecnt; count++) {
1058 info_devices[count] = devices[count].i;
1059 info_devices[count].next = devices_list;
1060 devices_list = &info_devices[count];
1061 }
1062 if (st->ss->validate_container(devices_list))
1063 pr_err("Mismatch detected!\n");
1064 free(info_devices);
1065 }
1066
1067 st->ss->free_super(st);
1068 sysfs_uevent(content, "change");
1069 if (err_ok && okcnt < (unsigned)content->array.raid_disks)
1070 /* Was partial, is still partial, so signal an error
1071 * to ensure we don't retry */
1072 return 1;
1073 return 0;
1074 }
1075
1076 /* Get number of in-sync devices according to the superblock.
1077 * We must have this number to start the array without -s or -R
1078 */
1079 req_cnt = content->array.working_disks;
1080
1081 if (c->runstop == 1 ||
1082 (c->runstop <= 0 &&
1083 ( enough(content->array.level, content->array.raid_disks,
1084 content->array.layout, clean, avail) &&
1085 (okcnt + rebuilding_cnt >= req_cnt || start_partial_ok)
1086 ))) {
1087 /* This array is good-to-go.
1088 * If a reshape is in progress then we might need to
1089 * continue monitoring it. In that case we start
1090 * it read-only and let the grow code make it writable.
1091 */
1092 int rv;
1093 if (content->reshape_active &&
1094 !(content->reshape_active & RESHAPE_NO_BACKUP) &&
1095 content->delta_disks <= 0) {
1096 if (!c->backup_file) {
1097 pr_err("%s: Need a backup file to complete reshape of this array.\n",
1098 mddev);
1099 pr_err("Please provided one with \"--backup-file=...\"\n");
1100 if (c->update &&
1101 strcmp(c->update, "revert-reshape") == 0)
1102 pr_err("(Don't specify --update=revert-reshape again, that part succeeded.)\n");
1103 return 1;
1104 }
1105 rv = sysfs_set_str(content, NULL,
1106 "array_state", "readonly");
1107 if (rv == 0)
1108 rv = Grow_continue(mdfd, st, content,
1109 c->backup_file, 0,
1110 c->freeze_reshape);
1111 } else if (c->readonly &&
1112 sysfs_attribute_available(
1113 content, NULL, "array_state")) {
1114 rv = sysfs_set_str(content, NULL,
1115 "array_state", "readonly");
1116 } else
1117 rv = ioctl(mdfd, RUN_ARRAY, NULL);
1118 reopen_mddev(mdfd); /* drop O_EXCL */
1119 if (rv == 0) {
1120 if (c->verbose >= 0) {
1121 pr_err("%s has been started with %d drive%s",
1122 mddev, okcnt, okcnt==1?"":"s");
1123 if (okcnt < (unsigned)content->array.raid_disks)
1124 fprintf(stderr, " (out of %d)", content->array.raid_disks);
1125 if (rebuilding_cnt)
1126 fprintf(stderr, "%s %d rebuilding", sparecnt?",":" and", rebuilding_cnt);
1127 if (sparecnt)
1128 fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s");
1129 if (content->journal_clean)
1130 fprintf(stderr, " and %d journal", journalcnt);
1131 fprintf(stderr, ".\n");
1132 }
1133 if (content->reshape_active &&
1134 content->array.level >= 4 &&
1135 content->array.level <= 6) {
1136 /* might need to increase the size
1137 * of the stripe cache - default is 256
1138 */
1139 int chunk_size = content->array.chunk_size;
1140 if (content->reshape_active &&
1141 content->new_chunk > chunk_size)
1142 chunk_size = content->new_chunk;
1143 if (256 < 4 * ((chunk_size+4065)/4096)) {
1144 struct mdinfo *sra = sysfs_read(mdfd, NULL, 0);
1145 if (sra)
1146 sysfs_set_num(sra, NULL,
1147 "stripe_cache_size",
1148 (4 * chunk_size / 4096) + 1);
1149 sysfs_free(sra);
1150 }
1151 }
1152 if (okcnt < (unsigned)content->array.raid_disks) {
1153 /* If any devices did not get added
1154 * because the kernel rejected them based
1155 * on event count, try adding them
1156 * again providing the action policy is
1157 * 're-add' or greater. The bitmap
1158 * might allow them to be included, or
1159 * they will become spares.
1160 */
1161 for (i = 0; i < bestcnt; i++) {
1162 int j = best[i];
1163 if (j >= 0 && !devices[j].uptodate) {
1164 if (!disk_action_allows(&devices[j].i, st->ss->name, act_re_add))
1165 continue;
1166 rv = add_disk(mdfd, st, content,
1167 &devices[j].i);
1168 if (rv == 0 && c->verbose >= 0)
1169 pr_err("%s has been re-added.\n",
1170 devices[j].devname);
1171 }
1172 }
1173 }
1174 if (content->array.level == 6 &&
1175 okcnt + 1 == (unsigned)content->array.raid_disks &&
1176 was_forced) {
1177 struct mdinfo *sra = sysfs_read(mdfd, NULL, 0);
1178 if (sra)
1179 sysfs_set_str(sra, NULL,
1180 "sync_action", "repair");
1181 sysfs_free(sra);
1182 }
1183 return 0;
1184 }
1185 pr_err("failed to RUN_ARRAY %s: %s\n",
1186 mddev, strerror(errno));
1187
1188 if (!enough(content->array.level, content->array.raid_disks,
1189 content->array.layout, 1, avail))
1190 pr_err("Not enough devices to start the array.\n");
1191 else if (!enough(content->array.level,
1192 content->array.raid_disks,
1193 content->array.layout, clean,
1194 avail))
1195 pr_err("Not enough devices to start the array while not clean - consider --force.\n");
1196
1197 return 1;
1198 }
1199 if (c->runstop == -1) {
1200 pr_err("%s assembled from %d drive%s",
1201 mddev, okcnt, okcnt==1?"":"s");
1202 if (okcnt != (unsigned)content->array.raid_disks)
1203 fprintf(stderr, " (out of %d)", content->array.raid_disks);
1204 fprintf(stderr, ", but not started.\n");
1205 return 2;
1206 }
1207 if (c->verbose >= -1) {
1208 pr_err("%s assembled from %d drive%s", mddev, okcnt, okcnt==1?"":"s");
1209 if (rebuilding_cnt)
1210 fprintf(stderr, "%s %d rebuilding", sparecnt?",":" and", rebuilding_cnt);
1211 if (sparecnt)
1212 fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s");
1213 if (!enough(content->array.level, content->array.raid_disks,
1214 content->array.layout, 1, avail))
1215 fprintf(stderr, " - not enough to start the array.\n");
1216 else if (!enough(content->array.level,
1217 content->array.raid_disks,
1218 content->array.layout, clean,
1219 avail))
1220 fprintf(stderr, " - not enough to start the array while not clean - consider --force.\n");
1221 else {
1222 if (req_cnt == (unsigned)content->array.raid_disks)
1223 fprintf(stderr, " - need all %d to start it", req_cnt);
1224 else
1225 fprintf(stderr, " - need %d to start", req_cnt);
1226 fprintf(stderr, " (use --run to insist).\n");
1227 }
1228 }
1229 return 1;
1230 }
1231
1232 int Assemble(struct supertype *st, char *mddev,
1233 struct mddev_ident *ident,
1234 struct mddev_dev *devlist,
1235 struct context *c)
1236 {
1237 /*
1238 * The task of Assemble is to find a collection of
1239 * devices that should (according to their superblocks)
1240 * form an array, and to give this collection to the MD driver.
1241 * In Linux-2.4 and later, this involves submitting a
1242 * SET_ARRAY_INFO ioctl with no arg - to prepare
1243 * the array - and then submit a number of
1244 * ADD_NEW_DISK ioctls to add disks into
1245 * the array. Finally RUN_ARRAY might
1246 * be submitted to start the array.
1247 *
1248 * Much of the work of Assemble is in finding and/or
1249 * checking the disks to make sure they look right.
1250 *
1251 * If mddev is not set, then scan must be set and we
1252 * read through the config file for dev+uuid mapping
1253 * We recurse, setting mddev, for each device that
1254 * - isn't running
1255 * - has a valid uuid (or any uuid if !uuidset)
1256 *
1257 * If mddev is set, we try to determine state of md.
1258 * check version - must be at least 0.90.0
1259 * check kernel version. must be at least 2.4.
1260 * If not, we can possibly fall back on START_ARRAY
1261 * Try to GET_ARRAY_INFO.
1262 * If possible, give up
1263 * If not, try to STOP_ARRAY just to make sure
1264 *
1265 * If !uuidset and scan, look in conf-file for uuid
1266 * If not found, give up
1267 * If !devlist and scan and uuidset, get list of devs from conf-file
1268 *
1269 * For each device:
1270 * Check superblock - discard if bad
1271 * Check uuid (set if we don't have one) - discard if no match
1272 * Check superblock similarity if we have a superblock - discard if different
1273 * Record events, devicenum
1274 * This should give us a list of devices for the array
1275 * We should collect the most recent event number
1276 *
1277 * Count disks with recent enough event count
1278 * While force && !enough disks
1279 * Choose newest rejected disks, update event count
1280 * mark clean and rewrite superblock
1281 * If recent kernel:
1282 * SET_ARRAY_INFO
1283 * foreach device with recent events : ADD_NEW_DISK
1284 * if runstop == 1 || "enough" disks and runstop==0 -> RUN_ARRAY
1285 * If old kernel:
1286 * Check the device numbers in superblock are right
1287 * update superblock if any changes
1288 * START_ARRAY
1289 *
1290 */
1291 int rv;
1292 int mdfd;
1293 int clean;
1294 int auto_assem = (mddev == NULL && !ident->uuid_set &&
1295 ident->super_minor == UnSet && ident->name[0] == 0
1296 && (ident->container == NULL || ident->member == NULL));
1297 struct devs *devices;
1298 char *devmap;
1299 int *best = NULL; /* indexed by raid_disk */
1300 int bestcnt = 0;
1301 int devcnt;
1302 unsigned int okcnt, sparecnt, rebuilding_cnt, replcnt, journalcnt;
1303 int journal_clean = 0;
1304 int i;
1305 int was_forced = 0;
1306 int most_recent = 0;
1307 int chosen_drive;
1308 int change = 0;
1309 int inargv = 0;
1310 int start_partial_ok = (c->runstop >= 0) &&
1311 (c->force || devlist==NULL || auto_assem);
1312 int num_devs;
1313 struct mddev_dev *tmpdev;
1314 struct mdinfo info;
1315 struct mdinfo *content = NULL;
1316 struct mdinfo *pre_exist = NULL;
1317 char *avail;
1318 char *name = NULL;
1319 char chosen_name[1024];
1320 struct map_ent *map = NULL;
1321 struct map_ent *mp;
1322
1323 /*
1324 * If any subdevs are listed, then any that don't
1325 * match ident are discarded. Remainder must all match and
1326 * become the array.
1327 * If no subdevs, then we scan all devices in the config file, but
1328 * there must be something in the identity
1329 */
1330
1331 if (!devlist &&
1332 ident->uuid_set == 0 &&
1333 (ident->super_minor < 0 || ident->super_minor == UnSet) &&
1334 ident->name[0] == 0 &&
1335 (ident->container == NULL || ident->member == NULL) &&
1336 ident->devices == NULL) {
1337 pr_err("No identity information available for %s - cannot assemble.\n",
1338 mddev ? mddev : "further assembly");
1339 return 1;
1340 }
1341
1342 if (devlist == NULL)
1343 devlist = conf_get_devs();
1344 else if (mddev)
1345 inargv = 1;
1346
1347 try_again:
1348 /* We come back here when doing auto-assembly and attempting some
1349 * set of devices failed. Those are now marked as ->used==2 and
1350 * we ignore them and try again
1351 */
1352 if (!st && ident->st)
1353 st = ident->st;
1354 if (c->verbose>0)
1355 pr_err("looking for devices for %s\n",
1356 mddev ? mddev : "further assembly");
1357
1358 content = &info;
1359 if (st && c->force)
1360 st->ignore_hw_compat = 1;
1361 num_devs = select_devices(devlist, ident, &st, &content, c,
1362 inargv, auto_assem);
1363 if (num_devs < 0)
1364 return 1;
1365
1366 if (!st || !st->sb || !content)
1367 return 2;
1368
1369 /* We have a full set of devices - we now need to find the
1370 * array device.
1371 * However there is a risk that we are racing with "mdadm -I"
1372 * and the array is already partially assembled - we will have
1373 * rejected any devices already in this address.
1374 * So we take a lock on the map file - to prevent further races -
1375 * and look for the uuid in there. If found and the array is
1376 * active, we abort. If found and the array is not active
1377 * we commit to that md device and add all the contained devices
1378 * to our list. We flag them so that we don't try to re-add,
1379 * but can remove if they turn out to not be wanted.
1380 */
1381 if (map_lock(&map))
1382 pr_err("failed to get exclusive lock on mapfile - continue anyway...\n");
1383 if (c->update && strcmp(c->update,"uuid") == 0)
1384 mp = NULL;
1385 else
1386 mp = map_by_uuid(&map, content->uuid);
1387 if (mp) {
1388 struct mdinfo *dv;
1389 /* array already exists. */
1390 pre_exist = sysfs_read(-1, mp->devnm, GET_LEVEL|GET_DEVS);
1391 if (pre_exist->array.level != UnSet) {
1392 pr_err("Found some drive for an array that is already active: %s\n",
1393 mp->path);
1394 pr_err("giving up.\n");
1395 return 1;
1396 }
1397 for (dv = pre_exist->devs; dv; dv = dv->next) {
1398 /* We want to add this device to our list,
1399 * but it could already be there if "mdadm -I"
1400 * started *after* we checked for O_EXCL.
1401 * If we add it to the top of the list
1402 * it will be preferred over later copies.
1403 */
1404 struct mddev_dev *newdev;
1405 char *devname = map_dev(dv->disk.major,
1406 dv->disk.minor,
1407 0);
1408 if (!devname)
1409 continue;
1410 newdev = xmalloc(sizeof(*newdev));
1411 newdev->devname = devname;
1412 newdev->disposition = 'I';
1413 newdev->used = 1;
1414 newdev->next = devlist;
1415 devlist = newdev;
1416 num_devs++;
1417 }
1418 strcpy(chosen_name, mp->path);
1419 if (c->verbose > 0 || mddev == NULL ||
1420 strcmp(mddev, chosen_name) != 0)
1421 pr_err("Merging with already-assembled %s\n",
1422 chosen_name);
1423 mdfd = open_dev_excl(mp->devnm);
1424 } else {
1425 int trustworthy = FOREIGN;
1426 name = content->name;
1427 switch (st->ss->match_home(st, c->homehost)
1428 ?: st->ss->match_home(st, "any")) {
1429 case 1:
1430 trustworthy = LOCAL;
1431 name = strchr(content->name, ':');
1432 if (name)
1433 name++;
1434 else
1435 name = content->name;
1436 break;
1437 }
1438 if (!auto_assem)
1439 /* If the array is listed in mdadm.conf or on
1440 * command line, then we trust the name
1441 * even if the array doesn't look local
1442 */
1443 trustworthy = LOCAL;
1444
1445 if (name[0] == 0 &&
1446 content->array.level == LEVEL_CONTAINER) {
1447 name = content->text_version;
1448 trustworthy = METADATA;
1449 }
1450
1451 if (name[0] && trustworthy != LOCAL &&
1452 ! c->require_homehost &&
1453 conf_name_is_free(name))
1454 trustworthy = LOCAL;
1455
1456 if (trustworthy == LOCAL &&
1457 strchr(name, ':'))
1458 /* Ignore 'host:' prefix of name */
1459 name = strchr(name, ':')+1;
1460
1461 mdfd = create_mddev(mddev, name, ident->autof, trustworthy,
1462 chosen_name);
1463 }
1464 if (mdfd < 0) {
1465 st->ss->free_super(st);
1466 if (auto_assem)
1467 goto try_again;
1468 return 1;
1469 }
1470 mddev = chosen_name;
1471 if (get_linux_version() < 2004000) {
1472 pr_err("Assemble requires Linux 2.4 or later, and\n"
1473 " md driver version 0.90.0 or later.\n"
1474 " Upgrade your kernel or try --build\n");
1475 close(mdfd);
1476 return 1;
1477 }
1478 if (pre_exist == NULL) {
1479 if (mddev_busy(fd2devnm(mdfd))) {
1480 pr_err("%s already active, cannot restart it!\n",
1481 mddev);
1482 for (tmpdev = devlist ;
1483 tmpdev && tmpdev->used != 1;
1484 tmpdev = tmpdev->next)
1485 ;
1486 if (tmpdev && auto_assem)
1487 pr_err("%s needed for %s...\n",
1488 mddev, tmpdev->devname);
1489 close(mdfd);
1490 mdfd = -3;
1491 st->ss->free_super(st);
1492 if (auto_assem)
1493 goto try_again;
1494 return 1;
1495 }
1496 /* just incase it was started but has no content */
1497 ioctl(mdfd, STOP_ARRAY, NULL);
1498 }
1499
1500 if (content != &info) {
1501 /* This is a member of a container. Try starting the array. */
1502 int err;
1503 err = assemble_container_content(st, mdfd, content, c,
1504 chosen_name, NULL);
1505 close(mdfd);
1506 return err;
1507 }
1508
1509 /* Ok, no bad inconsistancy, we can try updating etc */
1510 devices = xcalloc(num_devs, sizeof(*devices));
1511 devmap = xcalloc(num_devs, content->array.raid_disks);
1512 devcnt = load_devices(devices, devmap, ident, &st, devlist,
1513 c, content, mdfd, mddev,
1514 &most_recent, &bestcnt, &best, inargv);
1515 if (devcnt < 0)
1516 return 1;
1517
1518 if (devcnt == 0) {
1519 pr_err("no devices found for %s\n",
1520 mddev);
1521 if (st)
1522 st->ss->free_super(st);
1523 close(mdfd);
1524 free(devices);
1525 free(devmap);
1526 return 1;
1527 }
1528
1529 if (c->update && strcmp(c->update, "byteorder")==0)
1530 st->minor_version = 90;
1531
1532 st->ss->getinfo_super(st, content, NULL);
1533 clean = content->array.state & 1;
1534
1535 /* now we have some devices that might be suitable.
1536 * I wonder how many
1537 */
1538 avail = xcalloc(content->array.raid_disks, 1);
1539 okcnt = 0;
1540 replcnt = 0;
1541 sparecnt=0;
1542 journalcnt=0;
1543 rebuilding_cnt=0;
1544 for (i=0; i< bestcnt; i++) {
1545 int j = best[i];
1546 int event_margin = 1; /* always allow a difference of '1'
1547 * like the kernel does
1548 */
1549 if (j < 0) continue;
1550 /* note: we ignore error flags in multipath arrays
1551 * as they don't make sense
1552 */
1553 if (content->array.level != LEVEL_MULTIPATH) {
1554 if (devices[j].i.disk.state & (1<<MD_DISK_JOURNAL)) {
1555 if (content->journal_device_required)
1556 journalcnt++;
1557 else /* unexpected journal, mark as faulty */
1558 devices[j].i.disk.state |= (1<<MD_DISK_FAULTY);
1559 } else if (!(devices[j].i.disk.state & (1<<MD_DISK_ACTIVE))) {
1560 if (!(devices[j].i.disk.state
1561 & (1<<MD_DISK_FAULTY))) {
1562 devices[j].uptodate = 1;
1563 sparecnt++;
1564 }
1565 continue;
1566 }
1567 }
1568 /* If this device thinks that 'most_recent' has failed, then
1569 * we must reject this device.
1570 */
1571 if (j != most_recent && !c->force &&
1572 content->array.raid_disks > 0 &&
1573 devices[most_recent].i.disk.raid_disk >= 0 &&
1574 devmap[j * content->array.raid_disks + devices[most_recent].i.disk.raid_disk] == 0) {
1575 if (c->verbose > -1)
1576 pr_err("ignoring %s as it reports %s as failed\n",
1577 devices[j].devname, devices[most_recent].devname);
1578 best[i] = -1;
1579 continue;
1580 }
1581 /* Require event counter to be same as, or just less than,
1582 * most recent. If it is bigger, it must be a stray spare and
1583 * should be ignored.
1584 */
1585 if (devices[j].i.events+event_margin >=
1586 devices[most_recent].i.events &&
1587 devices[j].i.events <=
1588 devices[most_recent].i.events
1589 ) {
1590 devices[j].uptodate = 1;
1591 if (devices[j].i.disk.state & (1<<MD_DISK_JOURNAL))
1592 journal_clean = 1;
1593 if (i < content->array.raid_disks * 2) {
1594 if (devices[j].i.recovery_start == MaxSector ||
1595 (content->reshape_active &&
1596 i >= content->array.raid_disks - content->delta_disks)) {
1597 if (!avail[i/2]) {
1598 okcnt++;
1599 avail[i/2]=1;
1600 } else
1601 replcnt++;
1602 } else
1603 rebuilding_cnt++;
1604 } else if (devices[j].i.disk.raid_disk != MD_DISK_ROLE_JOURNAL)
1605 sparecnt++;
1606 }
1607 }
1608 free(devmap);
1609 if (c->force) {
1610 int force_ok = force_array(content, devices, best, bestcnt,
1611 avail, most_recent, st, c);
1612 okcnt += force_ok;
1613 if (force_ok)
1614 was_forced = 1;
1615 }
1616 /* Now we want to look at the superblock which the kernel will base things on
1617 * and compare the devices that we think are working with the devices that the
1618 * superblock thinks are working.
1619 * If there are differences and --force is given, then update this chosen
1620 * superblock.
1621 */
1622 chosen_drive = -1;
1623 st->ss->free_super(st);
1624 for (i=0; chosen_drive < 0 && i<bestcnt; i+=2) {
1625 int j = best[i];
1626 int fd;
1627
1628 if (j<0)
1629 continue;
1630 if (!devices[j].uptodate)
1631 continue;
1632 if (devices[j].i.events < devices[most_recent].i.events)
1633 continue;
1634 chosen_drive = j;
1635 if ((fd=dev_open(devices[j].devname,
1636 devices[j].included ? O_RDONLY
1637 : (O_RDONLY|O_EXCL)))< 0) {
1638 pr_err("Cannot open %s: %s\n",
1639 devices[j].devname, strerror(errno));
1640 close(mdfd);
1641 free(devices);
1642 return 1;
1643 }
1644 if (st->ss->load_super(st,fd, NULL)) {
1645 close(fd);
1646 pr_err("RAID superblock has disappeared from %s\n",
1647 devices[j].devname);
1648 close(mdfd);
1649 free(devices);
1650 return 1;
1651 }
1652 close(fd);
1653 }
1654 if (st->sb == NULL) {
1655 pr_err("No suitable drives found for %s\n", mddev);
1656 close(mdfd);
1657 free(devices);
1658 return 1;
1659 }
1660 st->ss->getinfo_super(st, content, NULL);
1661 if (sysfs_init(content, mdfd, NULL)) {
1662 pr_err("Unable to initialize sysfs\n");
1663 close(mdfd);
1664 free(devices);
1665 return 1;
1666 }
1667
1668 /* after reload context, store journal_clean in context */
1669 content->journal_clean = journal_clean;
1670 for (i=0; i<bestcnt; i++) {
1671 int j = best[i];
1672 unsigned int desired_state;
1673
1674 if (devices[j].i.disk.raid_disk == MD_DISK_ROLE_JOURNAL)
1675 desired_state = (1<<MD_DISK_JOURNAL);
1676 else if (i >= content->array.raid_disks * 2)
1677 desired_state = 0;
1678 else if (i & 1)
1679 desired_state = (1<<MD_DISK_ACTIVE) | (1<<MD_DISK_REPLACEMENT);
1680 else
1681 desired_state = (1<<MD_DISK_ACTIVE) | (1<<MD_DISK_SYNC);
1682
1683 if (j<0)
1684 continue;
1685 if (!devices[j].uptodate)
1686 continue;
1687
1688 devices[j].i.disk.state = desired_state;
1689 if (!(devices[j].i.array.state & 1))
1690 clean = 0;
1691
1692 if (st->ss->update_super(st, &devices[j].i, "assemble", NULL,
1693 c->verbose, 0, NULL)) {
1694 if (c->force) {
1695 if (c->verbose >= 0)
1696 pr_err("clearing FAULTY flag for device %d in %s for %s\n",
1697 j, mddev, devices[j].devname);
1698 change = 1;
1699 } else {
1700 if (c->verbose >= -1)
1701 pr_err("device %d in %s has wrong state in superblock, but %s seems ok\n",
1702 i, mddev, devices[j].devname);
1703 }
1704 }
1705 #if 0
1706 if (!(super.disks[i].i.disk.state & (1 << MD_DISK_FAULTY))) {
1707 pr_err("devices %d of %s is not marked FAULTY in superblock, but cannot be found\n",
1708 i, mddev);
1709 }
1710 #endif
1711 }
1712 if (c->force && !clean &&
1713 !enough(content->array.level, content->array.raid_disks,
1714 content->array.layout, clean,
1715 avail)) {
1716 change += st->ss->update_super(st, content, "force-array",
1717 devices[chosen_drive].devname, c->verbose,
1718 0, NULL);
1719 was_forced = 1;
1720 clean = 1;
1721 }
1722
1723 if (change) {
1724 int fd;
1725 fd = dev_open(devices[chosen_drive].devname,
1726 devices[chosen_drive].included ?
1727 O_RDWR : (O_RDWR|O_EXCL));
1728 if (fd < 0) {
1729 pr_err("Could not open %s for write - cannot Assemble array.\n",
1730 devices[chosen_drive].devname);
1731 close(mdfd);
1732 free(devices);
1733 return 1;
1734 }
1735 if (st->ss->store_super(st, fd)) {
1736 close(fd);
1737 pr_err("Could not re-write superblock on %s\n",
1738 devices[chosen_drive].devname);
1739 close(mdfd);
1740 free(devices);
1741 return 1;
1742 }
1743 if (c->verbose >= 0)
1744 pr_err("Marking array %s as 'clean'\n",
1745 mddev);
1746 close(fd);
1747 }
1748
1749 /* If we are in the middle of a reshape we may need to restore saved data
1750 * that was moved aside due to the reshape overwriting live data
1751 * The code of doing this lives in Grow.c
1752 */
1753 if (content->reshape_active &&
1754 !(content->reshape_active & RESHAPE_NO_BACKUP)) {
1755 int err = 0;
1756 int *fdlist = xmalloc(sizeof(int)* bestcnt);
1757 if (c->verbose > 0)
1758 pr_err("%s has an active reshape - checking if critical section needs to be restored\n",
1759 chosen_name);
1760 if (!c->backup_file)
1761 c->backup_file = locate_backup(content->sys_name);
1762 enable_fds(bestcnt/2);
1763 for (i = 0; i < bestcnt/2; i++) {
1764 int j = best[i*2];
1765 if (j >= 0) {
1766 fdlist[i] = dev_open(devices[j].devname,
1767 devices[j].included
1768 ? O_RDWR : (O_RDWR|O_EXCL));
1769 if (fdlist[i] < 0) {
1770 pr_err("Could not open %s for write - cannot Assemble array.\n",
1771 devices[j].devname);
1772 err = 1;
1773 break;
1774 }
1775 } else
1776 fdlist[i] = -1;
1777 }
1778 if (!err) {
1779 if (st->ss->external && st->ss->recover_backup)
1780 err = st->ss->recover_backup(st, content);
1781 else
1782 err = Grow_restart(st, content, fdlist, bestcnt/2,
1783 c->backup_file, c->verbose > 0);
1784 if (err && c->invalid_backup) {
1785 if (c->verbose > 0)
1786 pr_err("continuing without restoring backup\n");
1787 err = 0;
1788 }
1789 }
1790 while (i>0) {
1791 i--;
1792 if (fdlist[i]>=0) close(fdlist[i]);
1793 }
1794 free(fdlist);
1795 if (err) {
1796 pr_err("Failed to restore critical section for reshape, sorry.\n");
1797 if (c->backup_file == NULL)
1798 cont_err("Possibly you needed to specify the --backup-file\n");
1799 close(mdfd);
1800 free(devices);
1801 return err;
1802 }
1803 }
1804
1805 /* Almost ready to actually *do* something */
1806 /* First, fill in the map, so that udev can find our name
1807 * as soon as we become active.
1808 */
1809 if (c->update && strcmp(c->update, "metadata")==0) {
1810 content->array.major_version = 1;
1811 content->array.minor_version = 0;
1812 strcpy(content->text_version, "1.0");
1813 }
1814
1815 map_update(&map, fd2devnm(mdfd), content->text_version,
1816 content->uuid, chosen_name);
1817
1818 rv = start_array(mdfd, mddev, content,
1819 st, ident, best, bestcnt,
1820 chosen_drive, devices, okcnt, sparecnt,
1821 rebuilding_cnt, journalcnt,
1822 c,
1823 clean, avail, start_partial_ok,
1824 pre_exist != NULL,
1825 was_forced);
1826 if (rv == 1 && !pre_exist)
1827 ioctl(mdfd, STOP_ARRAY, NULL);
1828 free(devices);
1829 map_unlock(&map);
1830 if (rv == 0) {
1831 wait_for(chosen_name, mdfd);
1832 close(mdfd);
1833 if (auto_assem) {
1834 int usecs = 1;
1835 /* There is a nasty race with 'mdadm --monitor'.
1836 * If it opens this device before we close it,
1837 * it gets an incomplete open on which IO
1838 * doesn't work and the capacity is
1839 * wrong.
1840 * If we reopen (to check for layered devices)
1841 * before --monitor closes, we loose.
1842 *
1843 * So: wait upto 1 second for there to be
1844 * a non-zero capacity.
1845 */
1846 while (usecs < 1000) {
1847 mdfd = open(mddev, O_RDONLY);
1848 if (mdfd >= 0) {
1849 unsigned long long size;
1850 if (get_dev_size(mdfd, NULL, &size) &&
1851 size > 0)
1852 break;
1853 close(mdfd);
1854 }
1855 usleep(usecs);
1856 usecs <<= 1;
1857 }
1858 }
1859 } else
1860 close(mdfd);
1861
1862 /* '2' means 'OK, but not started yet' */
1863 return rv == 2 ? 0 : rv;
1864 }
1865
1866 int assemble_container_content(struct supertype *st, int mdfd,
1867 struct mdinfo *content, struct context *c,
1868 char *chosen_name, int *result)
1869 {
1870 struct mdinfo *dev, *sra, *dev2;
1871 int working = 0, preexist = 0;
1872 int expansion = 0;
1873 int old_raid_disks;
1874 int start_reshape;
1875 char *avail;
1876 int err;
1877
1878 if (sysfs_init(content, mdfd, NULL)) {
1879 pr_err("Unable to initialize sysfs\n");
1880 return 1;
1881 }
1882
1883 sra = sysfs_read(mdfd, NULL, GET_VERSION|GET_DEVS);
1884 if (sra == NULL || strcmp(sra->text_version, content->text_version) != 0) {
1885 if (content->array.major_version == -1 &&
1886 content->array.minor_version == -2 &&
1887 c->readonly &&
1888 content->text_version[0] == '/')
1889 content->text_version[0] = '-';
1890 if (sysfs_set_array(content, 9003) != 0) {
1891 sysfs_free(sra);
1892 return 1;
1893 }
1894 }
1895
1896 /* There are two types of reshape: container wide or sub-array specific
1897 * Check if metadata requests blocking container wide reshapes
1898 */
1899 start_reshape = (content->reshape_active &&
1900 !((content->reshape_active == CONTAINER_RESHAPE) &&
1901 (content->array.state & (1<<MD_SB_BLOCK_CONTAINER_RESHAPE))));
1902
1903 /* Block subarray here if it is under reshape now
1904 * Do not allow for any changes in this array
1905 */
1906 if (st->ss->external && content->recovery_blocked && start_reshape)
1907 block_subarray(content);
1908
1909 for (dev2 = sra->devs; dev2; dev2 = dev2->next) {
1910 for (dev = content->devs; dev; dev = dev->next)
1911 if (dev2->disk.major == dev->disk.major &&
1912 dev2->disk.minor == dev->disk.minor)
1913 break;
1914 if (dev)
1915 continue;
1916 /* Don't want this one any more */
1917 if (sysfs_set_str(sra, dev2, "slot", "none") < 0 &&
1918 errno == EBUSY) {
1919 pr_err("Cannot remove old device %s: not updating %s\n", dev2->sys_name, sra->sys_name);
1920 sysfs_free(sra);
1921 return 1;
1922 }
1923 sysfs_set_str(sra, dev2, "state", "remove");
1924 }
1925 old_raid_disks = content->array.raid_disks - content->delta_disks;
1926 avail = xcalloc(content->array.raid_disks, 1);
1927 for (dev = content->devs; dev; dev = dev->next) {
1928 if (dev->disk.raid_disk >= 0)
1929 avail[dev->disk.raid_disk] = 1;
1930 if (sysfs_add_disk(content, dev, 1) == 0) {
1931 if (dev->disk.raid_disk >= old_raid_disks &&
1932 content->reshape_active)
1933 expansion++;
1934 else
1935 working++;
1936 } else if (errno == EEXIST)
1937 preexist++;
1938 }
1939 sysfs_free(sra);
1940 if (working + expansion == 0 && c->runstop <= 0) {
1941 free(avail);
1942 return 1;/* Nothing new, don't try to start */
1943 }
1944 map_update(NULL, fd2devnm(mdfd), content->text_version,
1945 content->uuid, chosen_name);
1946
1947 if (content->consistency_policy == CONSISTENCY_POLICY_PPL &&
1948 st->ss->validate_ppl) {
1949 content->array.state |= 1;
1950 err = 0;
1951
1952 for (dev = content->devs; dev; dev = dev->next) {
1953 int dfd;
1954 char *devpath;
1955 int ret;
1956
1957 ret = st->ss->validate_ppl(st, content, dev);
1958 if (ret == 0)
1959 continue;
1960
1961 if (ret < 0) {
1962 err = 1;
1963 break;
1964 }
1965
1966 if (!c->force) {
1967 pr_err("%s contains invalid PPL - consider --force or --update-subarray with --update=no-ppl\n",
1968 chosen_name);
1969 content->array.state &= ~1;
1970 avail[dev->disk.raid_disk] = 0;
1971 break;
1972 }
1973
1974 /* have --force - overwrite the invalid ppl */
1975 devpath = map_dev(dev->disk.major, dev->disk.minor, 0);
1976 dfd = dev_open(devpath, O_RDWR);
1977 if (dfd < 0) {
1978 pr_err("Failed to open %s\n", devpath);
1979 err = 1;
1980 break;
1981 }
1982
1983 err = st->ss->write_init_ppl(st, content, dfd);
1984 close(dfd);
1985
1986 if (err)
1987 break;
1988 }
1989
1990 if (err) {
1991 free(avail);
1992 return err;
1993 }
1994 }
1995
1996 if (enough(content->array.level, content->array.raid_disks,
1997 content->array.layout, content->array.state & 1, avail) == 0) {
1998 if (c->export && result)
1999 *result |= INCR_NO;
2000 else if (c->verbose >= 0) {
2001 pr_err("%s assembled with %d device%s",
2002 chosen_name, preexist + working,
2003 preexist + working == 1 ? "":"s");
2004 if (preexist)
2005 fprintf(stderr, " (%d new)", working);
2006 fprintf(stderr, " but not started\n");
2007 }
2008 free(avail);
2009 return 1;
2010 }
2011 free(avail);
2012
2013 if (c->runstop <= 0 &&
2014 (working + preexist + expansion) <
2015 content->array.working_disks) {
2016 if (c->export && result)
2017 *result |= INCR_UNSAFE;
2018 else if (c->verbose >= 0) {
2019 pr_err("%s assembled with %d device%s",
2020 chosen_name, preexist + working,
2021 preexist + working == 1 ? "":"s");
2022 if (preexist)
2023 fprintf(stderr, " (%d new)", working);
2024 fprintf(stderr, " but not safe to start\n");
2025 }
2026 return 1;
2027 }
2028
2029
2030 if (start_reshape) {
2031 int spare = content->array.raid_disks + expansion;
2032 if (restore_backup(st, content,
2033 working,
2034 spare, &c->backup_file, c->verbose) == 1)
2035 return 1;
2036
2037 err = sysfs_set_str(content, NULL,
2038 "array_state", "readonly");
2039 if (err)
2040 return 1;
2041
2042 if (st->ss->external) {
2043 if (!mdmon_running(st->container_devnm))
2044 start_mdmon(st->container_devnm);
2045 ping_monitor(st->container_devnm);
2046 if (mdmon_running(st->container_devnm) &&
2047 st->update_tail == NULL)
2048 st->update_tail = &st->updates;
2049 }
2050
2051 err = Grow_continue(mdfd, st, content, c->backup_file,
2052 0, c->freeze_reshape);
2053 } else switch(content->array.level) {
2054 case LEVEL_LINEAR:
2055 case LEVEL_MULTIPATH:
2056 case 0:
2057 err = sysfs_set_str(content, NULL, "array_state",
2058 c->readonly ? "readonly" : "active");
2059 break;
2060 default:
2061 err = sysfs_set_str(content, NULL, "array_state",
2062 "readonly");
2063 /* start mdmon if needed. */
2064 if (!err) {
2065 if (!mdmon_running(st->container_devnm))
2066 start_mdmon(st->container_devnm);
2067 ping_monitor(st->container_devnm);
2068 }
2069 break;
2070 }
2071 if (!err)
2072 sysfs_set_safemode(content, content->safe_mode_delay);
2073
2074 /* Block subarray here if it is not reshaped now
2075 * It has be blocked a little later to allow mdmon to switch in
2076 * in to R/W state
2077 */
2078 if (st->ss->external && content->recovery_blocked &&
2079 !start_reshape)
2080 block_subarray(content);
2081
2082 if (c->export && result) {
2083 if (err)
2084 *result |= INCR_NO;
2085 else
2086 *result |= INCR_YES;
2087 } else if (c->verbose >= 0) {
2088 if (err)
2089 pr_err("array %s now has %d device%s",
2090 chosen_name, working + preexist,
2091 working + preexist == 1 ? "":"s");
2092 else
2093 pr_err("Started %s with %d device%s",
2094 chosen_name, working + preexist,
2095 working + preexist == 1 ? "":"s");
2096 if (preexist)
2097 fprintf(stderr, " (%d new)", working);
2098 if (expansion)
2099 fprintf(stderr, " ( + %d for expansion)",
2100 expansion);
2101 fprintf(stderr, "\n");
2102 }
2103 if (!err)
2104 wait_for(chosen_name, mdfd);
2105 return err;
2106 /* FIXME should have an O_EXCL and wait for read-auto */
2107 }
Unnamed repository; edit this file 'description' to name the repository.