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Preliminary -As support for container member arrays
[thirdparty/mdadm.git] / Incremental.c
1 /*
2 * Incremental.c - support --incremental. Part of:
3 * mdadm - manage Linux "md" devices aka RAID arrays.
4 *
5 * Copyright (C) 2006 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
33 static int count_active(struct supertype *st, int mdfd, char **availp,
34 struct mdinfo *info);
35 static void find_reject(int mdfd, struct supertype *st, struct mdinfo *sra,
36 int number, __u64 events, int verbose,
37 char *array_name);
38
39 int Incremental(char *devname, int verbose, int runstop,
40 struct supertype *st, char *homehost, int autof)
41 {
42 /* Add this device to an array, creating the array if necessary
43 * and starting the array if sensible or - if runstop>0 - if possible.
44 *
45 * This has several steps:
46 *
47 * 1/ Check if device is permitted by mdadm.conf, reject if not.
48 * 2/ Find metadata, reject if none appropriate (check
49 * version/name from args)
50 * 3/ Check if there is a match in mdadm.conf
51 * 3a/ if not, check for homehost match. If no match, reject.
52 * 4/ Determine device number.
53 * - If in mdadm.conf with std name, use that
54 * - UUID in /var/run/mdadm.map use that
55 * - If name is suggestive, use that. unless in use with different uuid.
56 * - Choose a free, high number.
57 * - Use a partitioned device unless strong suggestion not to.
58 * e.g. auto=md
59 * Don't choose partitioned for containers.
60 * 5/ Find out if array already exists
61 * 5a/ if it does not
62 * - choose a name, from mdadm.conf or 'name' field in array.
63 * - create the array
64 * - add the device
65 * 5b/ if it does
66 * - check one drive in array to make sure metadata is a reasonably
67 * close match. Reject if not (e.g. different type)
68 * - add the device
69 * 6/ Make sure /var/run/mdadm.map contains this array.
70 * 7/ Is there enough devices to possibly start the array?
71 * For a container, this means running Incremental_container.
72 * 7a/ if not, finish with success.
73 * 7b/ if yes,
74 * - read all metadata and arrange devices like -A does
75 * - if number of OK devices match expected, or -R and there are enough,
76 * start the array (auto-readonly).
77 */
78 struct stat stb;
79 struct mdinfo info;
80 struct mddev_ident_s *array_list, *match;
81 char chosen_name[1024];
82 int rv;
83 int devnum;
84 struct map_ent *mp, *map = NULL;
85 int dfd, mdfd;
86 char *avail;
87 int active_disks;
88 int uuid_for_name = 0;
89 char *name_to_use;
90 char nbuf[64];
91
92 struct createinfo *ci = conf_get_create_info();
93
94 if (autof == 0)
95 autof = ci->autof;
96
97 /* 1/ Check if device is permitted by mdadm.conf */
98
99 if (!conf_test_dev(devname)) {
100 if (verbose >= 0)
101 fprintf(stderr, Name
102 ": %s not permitted by mdadm.conf.\n",
103 devname);
104 return 1;
105 }
106
107 /* 2/ Find metadata, reject if none appropriate (check
108 * version/name from args) */
109
110 dfd = dev_open(devname, O_RDONLY|O_EXCL);
111 if (dfd < 0) {
112 if (verbose >= 0)
113 fprintf(stderr, Name ": cannot open %s: %s.\n",
114 devname, strerror(errno));
115 return 1;
116 }
117 if (fstat(dfd, &stb) < 0) {
118 if (verbose >= 0)
119 fprintf(stderr, Name ": fstat failed for %s: %s.\n",
120 devname, strerror(errno));
121 close(dfd);
122 return 1;
123 }
124 if ((stb.st_mode & S_IFMT) != S_IFBLK) {
125 if (verbose >= 0)
126 fprintf(stderr, Name ": %s is not a block device.\n",
127 devname);
128 close(dfd);
129 return 1;
130 }
131
132 if (st == NULL && (st = guess_super(dfd)) == NULL) {
133 if (verbose >= 0)
134 fprintf(stderr, Name
135 ": no recognisable superblock on %s.\n",
136 devname);
137 close(dfd);
138 return 1;
139 }
140 if (st->ss->load_super(st, dfd, NULL)) {
141 if (verbose >= 0)
142 fprintf(stderr, Name ": no RAID superblock on %s.\n",
143 devname);
144 close(dfd);
145 return 1;
146 }
147 close (dfd);
148
149 if (st->ss->container_content && st->loaded_container) {
150 /* This is a pre-built container array, so we do something
151 * rather different.
152 */
153 return Incremental_container(st, devname, verbose, runstop,
154 autof);
155 }
156
157 memset(&info, 0, sizeof(info));
158 st->ss->getinfo_super(st, &info);
159 /* 3/ Check if there is a match in mdadm.conf */
160
161 array_list = conf_get_ident(NULL);
162 match = NULL;
163 for (; array_list; array_list = array_list->next) {
164 if (array_list->uuid_set &&
165 same_uuid(array_list->uuid, info.uuid, st->ss->swapuuid)
166 == 0) {
167 if (verbose >= 2)
168 fprintf(stderr, Name
169 ": UUID differs from %s.\n",
170 array_list->devname);
171 continue;
172 }
173 if (array_list->name[0] &&
174 strcasecmp(array_list->name, info.name) != 0) {
175 if (verbose >= 2)
176 fprintf(stderr, Name
177 ": Name differs from %s.\n",
178 array_list->devname);
179 continue;
180 }
181 if (array_list->devices &&
182 !match_oneof(array_list->devices, devname)) {
183 if (verbose >= 2)
184 fprintf(stderr, Name
185 ": Not a listed device for %s.\n",
186 array_list->devname);
187 continue;
188 }
189 if (array_list->super_minor != UnSet &&
190 array_list->super_minor != info.array.md_minor) {
191 if (verbose >= 2)
192 fprintf(stderr, Name
193 ": Different super-minor to %s.\n",
194 array_list->devname);
195 continue;
196 }
197 if (!array_list->uuid_set &&
198 !array_list->name[0] &&
199 !array_list->devices &&
200 array_list->super_minor == UnSet) {
201 if (verbose >= 2)
202 fprintf(stderr, Name
203 ": %s doesn't have any identifying information.\n",
204 array_list->devname);
205 continue;
206 }
207 /* FIXME, should I check raid_disks and level too?? */
208
209 if (match) {
210 if (verbose >= 0)
211 fprintf(stderr, Name
212 ": we match both %s and %s - cannot decide which to use.\n",
213 match->devname, array_list->devname);
214 return 2;
215 }
216 match = array_list;
217 }
218
219 /* 3a/ if not, check for homehost match. If no match, reject. */
220 if (!match) {
221 if (homehost == NULL ||
222 st->ss->match_home(st, homehost) != 1)
223 uuid_for_name = 1;
224 }
225 /* 4/ Determine device number. */
226 /* - If in mdadm.conf with std name, use that */
227 /* - UUID in /var/run/mdadm.map use that */
228 /* - If name is suggestive, use that. unless in use with */
229 /* different uuid. */
230 /* - Choose a free, high number. */
231 /* - Use a partitioned device unless strong suggestion not to. */
232 /* e.g. auto=md */
233 mp = map_by_uuid(&map, info.uuid);
234
235 if (uuid_for_name && ! mp) {
236 name_to_use = fname_from_uuid(st, &info, nbuf, '-');
237 if (verbose >= 0)
238 fprintf(stderr, Name
239 ": not found in mdadm.conf and not identified by homehost"
240 " - using uuid based name\n");
241 } else
242 name_to_use = info.name;
243
244 if (match && is_standard(match->devname, &devnum))
245 /* We have devnum now */;
246 else if (mp != NULL)
247 devnum = mp->devnum;
248 else {
249 /* Have to guess a bit. */
250 int use_partitions = 1;
251 char *np, *ep;
252 char *nm, nbuf[1024];
253 struct stat stb2;
254
255 if ((autof&7) == 3 || (autof&7) == 5)
256 use_partitions = 0;
257 if (st->ss->external)
258 use_partitions = 0;
259 np = strchr(name_to_use, ':');
260 if (np)
261 np++;
262 else
263 np = name_to_use;
264 devnum = strtoul(np, &ep, 10);
265 if (ep > np && *ep == 0) {
266 /* This is a number. Let check that it is unused. */
267 if (mddev_busy(use_partitions ? (-1-devnum) : devnum))
268 devnum = -1;
269 } else
270 devnum = -1;
271
272 if (match)
273 nm = match->devname;
274 else {
275 sprintf(nbuf, "/dev/md/%s", np);
276 nm = nbuf;
277 }
278 if (stat(nm, &stb2) == 0 &&
279 S_ISBLK(stb2.st_mode) &&
280 major(stb2.st_rdev) == (use_partitions ?
281 get_mdp_major() : MD_MAJOR)) {
282 if (use_partitions)
283 devnum = minor(stb2.st_rdev) >> MdpMinorShift;
284 else
285 devnum = minor(stb2.st_rdev);
286 if (mddev_busy(use_partitions ? (-1-devnum) : devnum))
287 devnum = -1;
288 }
289
290 if (devnum < 0) {
291 /* Haven't found anything yet, choose something free */
292 devnum = find_free_devnum(use_partitions);
293
294 if (devnum == NoMdDev) {
295 fprintf(stderr, Name
296 ": No spare md devices!!\n");
297 return 2;
298 }
299 } else
300 devnum = use_partitions ? (-1-devnum) : devnum;
301 }
302
303 mdfd = open_mddev_devnum(match ? match->devname : mp ? mp->path : NULL,
304 devnum,
305 name_to_use,
306 chosen_name, autof >> 3);
307 if (mdfd < 0) {
308 fprintf(stderr, Name ": failed to open %s: %s.\n",
309 chosen_name, strerror(errno));
310 return 2;
311 }
312 sysfs_init(&info, mdfd, 0);
313
314 /* 5/ Find out if array already exists */
315 if (! mddev_busy(devnum)) {
316 /* 5a/ if it does not */
317 /* - choose a name, from mdadm.conf or 'name' field in array. */
318 /* - create the array */
319 /* - add the device */
320 struct mdinfo *sra;
321 struct mdinfo dinfo;
322
323 if (set_array_info(mdfd, st, &info) != 0) {
324 fprintf(stderr, Name ": failed to set array info for %s: %s\n",
325 chosen_name, strerror(errno));
326 close(mdfd);
327 return 2;
328 }
329
330 dinfo = info;
331 dinfo.disk.major = major(stb.st_rdev);
332 dinfo.disk.minor = minor(stb.st_rdev);
333 if (add_disk(mdfd, st, &info, &dinfo) != 0) {
334 fprintf(stderr, Name ": failed to add %s to %s: %s.\n",
335 devname, chosen_name, strerror(errno));
336 ioctl(mdfd, STOP_ARRAY, 0);
337 close(mdfd);
338 return 2;
339 }
340 sra = sysfs_read(mdfd, devnum, GET_DEVS);
341 if (!sra || !sra->devs || sra->devs->disk.raid_disk >= 0) {
342 /* It really should be 'none' - must be old buggy
343 * kernel, and mdadm -I may not be able to complete.
344 * So reject it.
345 */
346 ioctl(mdfd, STOP_ARRAY, NULL);
347 fprintf(stderr, Name
348 ": You have an old buggy kernel which cannot support\n"
349 " --incremental reliably. Aborting.\n");
350 close(mdfd);
351 sysfs_free(sra);
352 return 2;
353 }
354 info.array.working_disks = 1;
355 sysfs_free(sra);
356 } else {
357 /* 5b/ if it does */
358 /* - check one drive in array to make sure metadata is a reasonably */
359 /* close match. Reject if not (e.g. different type) */
360 /* - add the device */
361 char dn[20];
362 int dfd2;
363 int err;
364 struct mdinfo *sra;
365 struct supertype *st2;
366 struct mdinfo info2, *d;
367 sra = sysfs_read(mdfd, devnum, (GET_DEVS | GET_STATE));
368
369 sprintf(dn, "%d:%d", sra->devs->disk.major,
370 sra->devs->disk.minor);
371 dfd2 = dev_open(dn, O_RDONLY);
372 st2 = dup_super(st);
373 if (st2->ss->load_super(st2, dfd2, NULL) ||
374 st->ss->compare_super(st, st2) != 0) {
375 fprintf(stderr, Name
376 ": metadata mismatch between %s and "
377 "chosen array %s\n",
378 devname, chosen_name);
379 close(mdfd);
380 close(dfd2);
381 return 2;
382 }
383 close(dfd2);
384 memset(&info2, 0, sizeof(info2));
385 st2->ss->getinfo_super(st2, &info2);
386 st2->ss->free_super(st2);
387 if (info.array.level != info2.array.level ||
388 memcmp(info.uuid, info2.uuid, 16) != 0 ||
389 info.array.raid_disks != info2.array.raid_disks) {
390 fprintf(stderr, Name
391 ": unexpected difference between %s and %s.\n",
392 chosen_name, devname);
393 close(mdfd);
394 return 2;
395 }
396 info2.disk.major = major(stb.st_rdev);
397 info2.disk.minor = minor(stb.st_rdev);
398 /* add disk needs to know about containers */
399 if (st->ss->external)
400 sra->array.level = LEVEL_CONTAINER;
401 err = add_disk(mdfd, st2, sra, &info2);
402 if (err < 0 && errno == EBUSY) {
403 /* could be another device present with the same
404 * disk.number. Find and reject any such
405 */
406 find_reject(mdfd, st, sra, info.disk.number,
407 info.events, verbose, chosen_name);
408 err = add_disk(mdfd, st2, sra, &info2);
409 }
410 if (err < 0) {
411 fprintf(stderr, Name ": failed to add %s to %s: %s.\n",
412 devname, chosen_name, strerror(errno));
413 close(mdfd);
414 return 2;
415 }
416 info.array.working_disks = 0;
417 for (d = sra->devs; d; d=d->next)
418 info.array.working_disks ++;
419
420 }
421 /* 6/ Make sure /var/run/mdadm.map contains this array. */
422 map_update(&map, devnum,
423 info.text_version,
424 info.uuid, chosen_name);
425
426 /* 7/ Is there enough devices to possibly start the array? */
427 /* 7a/ if not, finish with success. */
428 if (info.array.level == LEVEL_CONTAINER) {
429 /* Try to assemble within the container */
430 close(mdfd);
431 if (verbose >= 0)
432 fprintf(stderr, Name
433 ": container %s now has %d devices\n",
434 chosen_name, info.array.working_disks);
435 return Incremental(chosen_name, verbose, runstop,
436 NULL, homehost, autof);
437 }
438 avail = NULL;
439 active_disks = count_active(st, mdfd, &avail, &info);
440 if (enough(info.array.level, info.array.raid_disks,
441 info.array.layout, info.array.state & 1,
442 avail, active_disks) == 0) {
443 free(avail);
444 if (verbose >= 0)
445 fprintf(stderr, Name
446 ": %s attached to %s, not enough to start (%d).\n",
447 devname, chosen_name, active_disks);
448 close(mdfd);
449 return 0;
450 }
451 free(avail);
452
453 /* 7b/ if yes, */
454 /* - if number of OK devices match expected, or -R and there */
455 /* are enough, */
456 /* + add any bitmap file */
457 /* + start the array (auto-readonly). */
458 {
459 mdu_array_info_t ainf;
460
461 if (ioctl(mdfd, GET_ARRAY_INFO, &ainf) == 0) {
462 if (verbose >= 0)
463 fprintf(stderr, Name
464 ": %s attached to %s which is already active.\n",
465 devname, chosen_name);
466 close (mdfd);
467 return 0;
468 }
469 }
470 if (runstop > 0 || active_disks >= info.array.working_disks) {
471 struct mdinfo *sra;
472 /* Let's try to start it */
473 if (match && match->bitmap_file) {
474 int bmfd = open(match->bitmap_file, O_RDWR);
475 if (bmfd < 0) {
476 fprintf(stderr, Name
477 ": Could not open bitmap file %s.\n",
478 match->bitmap_file);
479 close(mdfd);
480 return 1;
481 }
482 if (ioctl(mdfd, SET_BITMAP_FILE, bmfd) != 0) {
483 close(bmfd);
484 fprintf(stderr, Name
485 ": Failed to set bitmapfile for %s.\n",
486 chosen_name);
487 close(mdfd);
488 return 1;
489 }
490 close(bmfd);
491 }
492 sra = sysfs_read(mdfd, devnum, 0);
493 if (sra == NULL || active_disks >= info.array.working_disks)
494 rv = ioctl(mdfd, RUN_ARRAY, NULL);
495 else
496 rv = sysfs_set_str(sra, NULL,
497 "array_state", "read-auto");
498 if (rv == 0) {
499 if (verbose >= 0)
500 fprintf(stderr, Name
501 ": %s attached to %s, which has been started.\n",
502 devname, chosen_name);
503 rv = 0;
504 } else {
505 fprintf(stderr, Name
506 ": %s attached to %s, but failed to start: %s.\n",
507 devname, chosen_name, strerror(errno));
508 rv = 1;
509 }
510 } else {
511 if (verbose >= 0)
512 fprintf(stderr, Name
513 ": %s attached to %s, not enough to start safely.\n",
514 devname, chosen_name);
515 rv = 0;
516 }
517 close(mdfd);
518 return rv;
519 }
520
521 static void find_reject(int mdfd, struct supertype *st, struct mdinfo *sra,
522 int number, __u64 events, int verbose,
523 char *array_name)
524 {
525 /* Find a device attached to this array with a disk.number of number
526 * and events less than the passed events, and remove the device.
527 */
528 struct mdinfo *d;
529 mdu_array_info_t ra;
530
531 if (ioctl(mdfd, GET_ARRAY_INFO, &ra) == 0)
532 return; /* not safe to remove from active arrays
533 * without thinking more */
534
535 for (d = sra->devs; d ; d = d->next) {
536 char dn[10];
537 int dfd;
538 struct mdinfo info;
539 sprintf(dn, "%d:%d", d->disk.major, d->disk.minor);
540 dfd = dev_open(dn, O_RDONLY);
541 if (dfd < 0)
542 continue;
543 if (st->ss->load_super(st, dfd, NULL)) {
544 close(dfd);
545 continue;
546 }
547 st->ss->getinfo_super(st, &info);
548 st->ss->free_super(st);
549 close(dfd);
550
551 if (info.disk.number != number ||
552 info.events >= events)
553 continue;
554
555 if (d->disk.raid_disk > -1)
556 sysfs_set_str(sra, d, "slot", "none");
557 if (sysfs_set_str(sra, d, "state", "remove") == 0)
558 if (verbose >= 0)
559 fprintf(stderr, Name
560 ": removing old device %s from %s\n",
561 d->sys_name+4, array_name);
562 }
563 }
564
565 static int count_active(struct supertype *st, int mdfd, char **availp,
566 struct mdinfo *bestinfo)
567 {
568 /* count how many devices in sra think they are active */
569 struct mdinfo *d;
570 int cnt = 0, cnt1 = 0;
571 __u64 max_events = 0;
572 struct mdinfo *sra = sysfs_read(mdfd, -1, GET_DEVS | GET_STATE);
573 char *avail = NULL;
574
575 for (d = sra->devs ; d ; d = d->next) {
576 char dn[30];
577 int dfd;
578 int ok;
579 struct mdinfo info;
580
581 sprintf(dn, "%d:%d", d->disk.major, d->disk.minor);
582 dfd = dev_open(dn, O_RDONLY);
583 if (dfd < 0)
584 continue;
585 ok = st->ss->load_super(st, dfd, NULL);
586 close(dfd);
587 if (ok != 0)
588 continue;
589 st->ss->getinfo_super(st, &info);
590 if (info.disk.state & (1<<MD_DISK_SYNC))
591 {
592 if (avail == NULL) {
593 avail = malloc(info.array.raid_disks);
594 memset(avail, 0, info.array.raid_disks);
595 }
596 if (cnt == 0) {
597 cnt++;
598 max_events = info.events;
599 avail[info.disk.raid_disk] = 2;
600 st->ss->getinfo_super(st, bestinfo);
601 } else if (info.events == max_events) {
602 cnt++;
603 avail[info.disk.raid_disk] = 2;
604 } else if (info.events == max_events-1) {
605 cnt1++;
606 avail[info.disk.raid_disk] = 1;
607 } else if (info.events < max_events - 1)
608 ;
609 else if (info.events == max_events+1) {
610 int i;
611 cnt1 = cnt;
612 cnt = 1;
613 max_events = info.events;
614 for (i=0; i<info.array.raid_disks; i++)
615 if (avail[i])
616 avail[i]--;
617 avail[info.disk.raid_disk] = 2;
618 st->ss->getinfo_super(st, bestinfo);
619 } else { /* info.events much bigger */
620 cnt = 1; cnt1 = 0;
621 memset(avail, 0, info.disk.raid_disk);
622 max_events = info.events;
623 st->ss->getinfo_super(st, bestinfo);
624 }
625 }
626 st->ss->free_super(st);
627 }
628 return cnt + cnt1;
629 }
630
631 void RebuildMap(void)
632 {
633 struct mdstat_ent *mdstat = mdstat_read(0, 0);
634 struct mdstat_ent *md;
635 struct map_ent *map = NULL;
636 int mdp = get_mdp_major();
637
638 for (md = mdstat ; md ; md = md->next) {
639 struct mdinfo *sra = sysfs_read(-1, md->devnum, GET_DEVS);
640 struct mdinfo *sd;
641
642 for (sd = sra->devs ; sd ; sd = sd->next) {
643 char dn[30];
644 int dfd;
645 int ok;
646 struct supertype *st;
647 char *path;
648 struct mdinfo info;
649
650 sprintf(dn, "%d:%d", sd->disk.major, sd->disk.minor);
651 dfd = dev_open(dn, O_RDONLY);
652 if (dfd < 0)
653 continue;
654 st = guess_super(dfd);
655 if ( st == NULL)
656 ok = -1;
657 else
658 ok = st->ss->load_super(st, dfd, NULL);
659 close(dfd);
660 if (ok != 0)
661 continue;
662 st->ss->getinfo_super(st, &info);
663 if (md->devnum > 0)
664 path = map_dev(MD_MAJOR, md->devnum, 0);
665 else
666 path = map_dev(mdp, (-1-md->devnum)<< 6, 0);
667 map_add(&map, md->devnum,
668 info.text_version,
669 info.uuid, path ? : "/unknown");
670 st->ss->free_super(st);
671 break;
672 }
673 }
674 map_write(map);
675 map_free(map);
676 }
677
678 int IncrementalScan(int verbose)
679 {
680 /* look at every device listed in the 'map' file.
681 * If one is found that is not running then:
682 * look in mdadm.conf for bitmap file.
683 * if one exists, but array has none, add it.
684 * try to start array in auto-readonly mode
685 */
686 struct map_ent *mapl = NULL;
687 struct map_ent *me;
688 mddev_ident_t devs, mddev;
689 int rv = 0;
690
691 map_read(&mapl);
692 devs = conf_get_ident(NULL);
693
694 for (me = mapl ; me ; me = me->next) {
695 char path[1024];
696 mdu_array_info_t array;
697 mdu_bitmap_file_t bmf;
698 struct mdinfo *sra;
699 int mdfd = open_mddev_devnum(me->path, me->devnum,
700 NULL, path, 0);
701 if (mdfd < 0)
702 continue;
703 if (ioctl(mdfd, GET_ARRAY_INFO, &array) == 0 ||
704 errno != ENODEV) {
705 close(mdfd);
706 continue;
707 }
708 /* Ok, we can try this one. Maybe it needs a bitmap */
709 for (mddev = devs ; mddev ; mddev = mddev->next)
710 if (strcmp(mddev->devname, me->path) == 0)
711 break;
712 if (mddev && mddev->bitmap_file) {
713 /*
714 * Note: early kernels will wrongly fail this, so it
715 * is a hint only
716 */
717 int added = -1;
718 if (ioctl(mdfd, GET_ARRAY_INFO, &bmf) < 0) {
719 int bmfd = open(mddev->bitmap_file, O_RDWR);
720 if (bmfd >= 0) {
721 added = ioctl(mdfd, SET_BITMAP_FILE,
722 bmfd);
723 close(bmfd);
724 }
725 }
726 if (verbose >= 0) {
727 if (added == 0)
728 fprintf(stderr, Name
729 ": Added bitmap %s to %s\n",
730 mddev->bitmap_file, me->path);
731 else if (errno != EEXIST)
732 fprintf(stderr, Name
733 ": Failed to add bitmap to %s: %s\n",
734 me->path, strerror(errno));
735 }
736 }
737 sra = sysfs_read(mdfd, 0, 0);
738 if (sra) {
739 if (sysfs_set_str(sra, NULL,
740 "array_state", "read-auto") == 0) {
741 if (verbose >= 0)
742 fprintf(stderr, Name
743 ": started array %s\n",
744 me->path);
745 } else {
746 fprintf(stderr, Name
747 ": failed to start array %s: %s\n",
748 me->path, strerror(errno));
749 rv = 1;
750 }
751 }
752 }
753 return rv;
754 }
755
756 static char *container2devname(char *devname)
757 {
758 int fd = open(devname, O_RDONLY);
759 char *mdname = NULL;
760
761 if (fd >= 0) {
762 mdname = devnum2devname(fd2devnum(fd));
763 close(fd);
764 }
765
766 return mdname;
767 }
768
769 int Incremental_container(struct supertype *st, char *devname, int verbose,
770 int runstop, int autof)
771 {
772 /* Collect the contents of this container and for each
773 * array, choose a device name and assemble the array.
774 */
775
776 struct mdinfo *list = st->ss->container_content(st);
777 struct mdinfo *ra;
778 char *mdname = container2devname(devname);
779
780 if (!mdname) {
781 fprintf(stderr, Name": failed to determine device name\n");
782 return 2;
783 }
784
785 for (ra = list ; ra ; ra = ra->next) {
786 struct mdinfo *dev, *sra;
787 int devnum = -1;
788 int mdfd;
789 char chosen_name[1024];
790 int usepart = 1;
791 char *n;
792 int working = 0, preexist = 0;
793 struct map_ent *mp, *map = NULL;
794 char nbuf[64];
795 char *name_to_use;
796 struct mddev_ident_s *match = NULL;
797
798 if ((autof&7) == 3 || (autof&7) == 5)
799 usepart = 0;
800
801 mp = map_by_uuid(&map, ra->uuid);
802
803 name_to_use = ra->name;
804 if (! name_to_use ||
805 ! *name_to_use ||
806 (*devname != '/' || strncmp("UUID-", strrchr(devname,'/')+1,5) == 0)
807 )
808 name_to_use = fname_from_uuid(st, ra, nbuf, '-');
809
810 if (!mp) {
811
812 /* Check in mdadm.conf for devices == devname and
813 * member == ra->text_version after second slash.
814 */
815 char *sub = strchr(ra->text_version+1, '/');
816 struct mddev_ident_s *array_list;
817 if (sub) {
818 sub++;
819 array_list = conf_get_ident(NULL);
820 } else
821 array_list = NULL;
822 for(; array_list ; array_list = array_list->next) {
823 int fd;
824 char *dn;
825 if (array_list->member == NULL ||
826 array_list->container == NULL)
827 continue;
828 if (strcmp(array_list->member, sub) != 0)
829 continue;
830 if (array_list->uuid_set &&
831 !same_uuid(ra->uuid, array_list->uuid, st->ss->swapuuid))
832 continue;
833 fd = open(array_list->container, O_RDONLY);
834 if (fd < 0)
835 continue;
836 dn = devnum2devname(fd2devnum(fd));
837 close(fd);
838 if (strncmp(dn, ra->text_version+1,
839 strlen(dn)) != 0 ||
840 ra->text_version[strlen(dn)+1] != '/') {
841 free(dn);
842 continue;
843 }
844 free(dn);
845 /* we have a match */
846 match = array_list;
847 if (verbose>0)
848 fprintf(stderr, Name ": match found for member %s\n",
849 array_list->member);
850 break;
851 }
852 }
853
854 if (match && is_standard(match->devname, &devnum))
855 /* we have devnum now */;
856 else if (mp)
857 devnum = mp->devnum;
858 else if (is_standard(name_to_use, &devnum))
859 /* have devnum */;
860 else {
861 n = name_to_use;
862 if (*n == 'd')
863 n++;
864 if (*n && devnum < 0) {
865 devnum = strtoul(n, &n, 10);
866 if (devnum >= 0 && (*n == 0 || *n == ' ')) {
867 /* Use this devnum */
868 usepart = (name_to_use[0] == 'd');
869 if (mddev_busy(usepart ? (-1-devnum) : devnum))
870 devnum = -1;
871 } else
872 devnum = -1;
873 }
874
875 if (devnum < 0) {
876 char *nm = name_to_use;
877 char nbuf[1024];
878 struct stat stb;
879 if (strchr(nm, ':'))
880 nm = strchr(nm, ':')+1;
881 sprintf(nbuf, "/dev/md/%s", nm);
882
883 if (stat(nbuf, &stb) == 0 &&
884 S_ISBLK(stb.st_mode) &&
885 major(stb.st_rdev) == (usepart ?
886 get_mdp_major() : MD_MAJOR)){
887 if (usepart)
888 devnum = minor(stb.st_rdev)
889 >> MdpMinorShift;
890 else
891 devnum = minor(stb.st_rdev);
892 if (mddev_busy(usepart ? (-1-devnum) : devnum))
893 devnum = -1;
894 }
895 }
896
897 if (devnum >= 0)
898 devnum = usepart ? (-1-devnum) : devnum;
899 else
900 devnum = find_free_devnum(usepart);
901 }
902 mdfd = open_mddev_devnum(mp ? mp->path : match ? match->devname : NULL,
903 devnum, name_to_use,
904 chosen_name, autof>>3);
905
906 if (mdfd < 0) {
907 fprintf(stderr, Name ": failed to open %s: %s.\n",
908 chosen_name, strerror(errno));
909 return 2;
910 }
911
912
913 sysfs_init(ra, mdfd, 0);
914
915 sra = sysfs_read(mdfd, 0, GET_VERSION);
916 if (sra == NULL || strcmp(sra->text_version, ra->text_version) != 0)
917 if (sysfs_set_array(ra, md_get_version(mdfd)) != 0)
918 return 1;
919 if (sra)
920 sysfs_free(sra);
921
922 for (dev = ra->devs; dev; dev = dev->next)
923 if (sysfs_add_disk(ra, dev) == 0)
924 working++;
925 else if (errno == EEXIST)
926 preexist++;
927 if (working == 0)
928 /* Nothing new, don't try to start */ ;
929 else if (runstop > 0 ||
930 (working + preexist) >= ra->array.working_disks) {
931 switch(ra->array.level) {
932 case LEVEL_LINEAR:
933 case LEVEL_MULTIPATH:
934 case 0:
935 sysfs_set_str(ra, NULL, "array_state",
936 "active");
937 break;
938 default:
939 sysfs_set_str(ra, NULL, "array_state",
940 "readonly");
941 /* start mdmon if needed. */
942 if (!mdmon_running(st->container_dev))
943 start_mdmon(st->container_dev);
944 ping_monitor(devnum2devname(st->container_dev));
945 break;
946 }
947 sysfs_set_safemode(ra, ra->safe_mode_delay);
948 if (verbose >= 0) {
949 fprintf(stderr, Name
950 ": Started %s with %d devices",
951 chosen_name, working + preexist);
952 if (preexist)
953 fprintf(stderr, " (%d new)", working);
954 fprintf(stderr, "\n");
955 }
956 /* FIXME should have an O_EXCL and wait for read-auto */
957 } else
958 if (verbose >= 0)
959 fprintf(stderr, Name
960 ": %s assembled with %d devices but "
961 "not started\n",
962 chosen_name, working);
963 close(mdfd);
964 map_update(&map, devnum,
965 ra->text_version,
966 ra->uuid, chosen_name);
967 }
968 return 0;
969 }
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