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Create: reduce the verbosity of 'default_layout'.
[thirdparty/mdadm.git] / Create.c
1 /*
2 * mdadm - manage Linux "md" devices aka RAID arrays.
3 *
4 * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de>
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 "md_u.h"
27 #include "md_p.h"
28 #include <ctype.h>
29
30 static int default_layout(struct supertype *st, int level, int verbose)
31 {
32 int layout = UnSet;
33
34 if (st && st->ss->default_geometry)
35 st->ss->default_geometry(st, &level, &layout, NULL);
36
37 if (layout == UnSet)
38 switch(level) {
39 default: /* no layout */
40 layout = 0;
41 break;
42 case 10:
43 layout = 0x102; /* near=2, far=1 */
44 if (verbose > 0)
45 fprintf(stderr,
46 Name ": layout defaults to n2\n");
47 break;
48 case 5:
49 case 6:
50 layout = map_name(r5layout, "default");
51 if (verbose > 0)
52 fprintf(stderr,
53 Name ": layout defaults to %s\n", map_num(r5layout, layout));
54 break;
55 case LEVEL_FAULTY:
56 layout = map_name(faultylayout, "default");
57
58 if (verbose > 0)
59 fprintf(stderr,
60 Name ": layout defaults to %s\n", map_num(faultylayout, layout));
61 break;
62 }
63
64 return layout;
65 }
66
67
68 int Create(struct supertype *st, char *mddev,
69 int chunk, int level, int layout, unsigned long long size,
70 int raiddisks, int sparedisks,
71 char *name, char *homehost, int *uuid,
72 int subdevs, struct mddev_dev *devlist,
73 int runstop, int verbose, int force, int assume_clean,
74 char *bitmap_file, int bitmap_chunk, int write_behind,
75 int delay, int autof)
76 {
77 /*
78 * Create a new raid array.
79 *
80 * First check that necessary details are available
81 * (i.e. level, raid-disks)
82 *
83 * Then check each disk to see what might be on it
84 * and report anything interesting.
85 *
86 * If anything looks odd, and runstop not set,
87 * abort.
88 *
89 * SET_ARRAY_INFO and ADD_NEW_DISK, and
90 * if runstop==run, or raiddisks disks were used,
91 * RUN_ARRAY
92 */
93 int mdfd;
94 unsigned long long minsize=0, maxsize=0;
95 char *mindisc = NULL;
96 char *maxdisc = NULL;
97 int dnum;
98 struct mddev_dev *dv;
99 int fail=0, warn=0;
100 struct stat stb;
101 int first_missing = subdevs * 2;
102 int second_missing = subdevs * 2;
103 int missing_disks = 0;
104 int insert_point = subdevs * 2; /* where to insert a missing drive */
105 int total_slots;
106 int pass;
107 int vers;
108 int rv;
109 int bitmap_fd;
110 int have_container = 0;
111 int container_fd = -1;
112 int need_mdmon = 0;
113 unsigned long long bitmapsize;
114 struct mdinfo info, *infos;
115 int did_default = 0;
116 int do_default_layout = 0;
117 int do_default_chunk = 0;
118 unsigned long safe_mode_delay = 0;
119 char chosen_name[1024];
120 struct map_ent *map = NULL;
121 unsigned long long newsize;
122
123 int major_num = BITMAP_MAJOR_HI;
124
125 memset(&info, 0, sizeof(info));
126 if (level == UnSet && st && st->ss->default_geometry)
127 st->ss->default_geometry(st, &level, NULL, NULL);
128 if (level == UnSet) {
129 fprintf(stderr,
130 Name ": a RAID level is needed to create an array.\n");
131 return 1;
132 }
133 if (raiddisks < 4 && level == 6) {
134 fprintf(stderr,
135 Name ": at least 4 raid-devices needed for level 6\n");
136 return 1;
137 }
138 if (raiddisks > 256 && level == 6) {
139 fprintf(stderr,
140 Name ": no more than 256 raid-devices supported for level 6\n");
141 return 1;
142 }
143 if (raiddisks < 2 && level >= 4) {
144 fprintf(stderr,
145 Name ": at least 2 raid-devices needed for level 4 or 5\n");
146 return 1;
147 }
148 if (level <= 0 && sparedisks) {
149 fprintf(stderr,
150 Name ": This level does not support spare devices\n");
151 return 1;
152 }
153
154 if (subdevs == 1 && strcmp(devlist->devname, "missing") != 0) {
155 /* If given a single device, it might be a container, and we can
156 * extract a device list from there
157 */
158 mdu_array_info_t inf;
159 int fd;
160
161 memset(&inf, 0, sizeof(inf));
162 fd = open(devlist->devname, O_RDONLY);
163 if (fd >= 0 &&
164 ioctl(fd, GET_ARRAY_INFO, &inf) == 0 &&
165 inf.raid_disks == 0) {
166 /* yep, looks like a container */
167 if (st) {
168 rv = st->ss->load_container(st, fd,
169 devlist->devname);
170 if (rv == 0)
171 have_container = 1;
172 } else {
173 st = super_by_fd(fd, NULL);
174 if (st && !(rv = st->ss->
175 load_container(st, fd,
176 devlist->devname)))
177 have_container = 1;
178 else
179 st = NULL;
180 }
181 if (have_container) {
182 subdevs = raiddisks;
183 first_missing = subdevs * 2;
184 second_missing = subdevs * 2;
185 insert_point = subdevs * 2;
186 }
187 }
188 if (fd >= 0)
189 close(fd);
190 }
191 if (st && st->ss->external && sparedisks) {
192 fprintf(stderr,
193 Name ": This metadata type does not support "
194 "spare disks at create time\n");
195 return 1;
196 }
197 if (subdevs > raiddisks+sparedisks) {
198 fprintf(stderr, Name ": You have listed more devices (%d) than are in the array(%d)!\n", subdevs, raiddisks+sparedisks);
199 return 1;
200 }
201 if (!have_container && subdevs < raiddisks+sparedisks) {
202 fprintf(stderr, Name ": You haven't given enough devices (real or missing) to create this array\n");
203 return 1;
204 }
205 if (bitmap_file && level <= 0) {
206 fprintf(stderr, Name ": bitmaps not meaningful with level %s\n",
207 map_num(pers, level)?:"given");
208 return 1;
209 }
210
211 /* now set some defaults */
212
213
214 if (layout == UnSet) {
215 do_default_layout = 1;
216 layout = default_layout(st, level, verbose);
217 }
218
219 if (level == 10)
220 /* check layout fits in array*/
221 if ((layout&255) * ((layout>>8)&255) > raiddisks) {
222 fprintf(stderr, Name ": that layout requires at least %d devices\n",
223 (layout&255) * ((layout>>8)&255));
224 return 1;
225 }
226
227 switch(level) {
228 case 4:
229 case 5:
230 case 10:
231 case 6:
232 case 0:
233 if (chunk == 0 || chunk == UnSet) {
234 chunk = UnSet;
235 do_default_chunk = 1;
236 /* chunk will be set later */
237 }
238 break;
239 case LEVEL_LINEAR:
240 /* a chunksize of zero 0s perfectly valid (and preferred) since 2.6.16 */
241 if (get_linux_version() < 2006016 && chunk == 0) {
242 chunk = 64;
243 if (verbose > 0)
244 fprintf(stderr, Name ": chunk size defaults to 64K\n");
245 }
246 break;
247 case 1:
248 case LEVEL_FAULTY:
249 case LEVEL_MULTIPATH:
250 case LEVEL_CONTAINER:
251 if (chunk) {
252 chunk = 0;
253 if (verbose > 0)
254 fprintf(stderr, Name ": chunk size ignored for this level\n");
255 }
256 break;
257 default:
258 fprintf(stderr, Name ": unknown level %d\n", level);
259 return 1;
260 }
261
262 if (size && chunk && chunk != UnSet)
263 size &= ~(unsigned long long)(chunk - 1);
264 newsize = size * 2;
265 if (st && ! st->ss->validate_geometry(st, level, layout, raiddisks,
266 &chunk, size*2, NULL, &newsize, verbose>=0))
267 return 1;
268
269 if (chunk && chunk != UnSet) {
270 newsize &= ~(unsigned long long)(chunk*2 - 1);
271 if (do_default_chunk) {
272 /* default chunk was just set */
273 if (verbose > 0)
274 fprintf(stderr, Name ": chunk size "
275 "defaults to %dK\n", chunk);
276 size &= ~(unsigned long long)(chunk - 1);
277 do_default_chunk = 0;
278 }
279 }
280
281 if (size == 0) {
282 size = newsize / 2;
283 if (size && verbose > 0)
284 fprintf(stderr, Name ": setting size to %lluK\n",
285 (unsigned long long)size);
286 }
287
288 /* now look at the subdevs */
289 info.array.active_disks = 0;
290 info.array.working_disks = 0;
291 dnum = 0;
292 for (dv=devlist; dv && !have_container; dv=dv->next, dnum++) {
293 char *dname = dv->devname;
294 unsigned long long freesize;
295 int dfd;
296
297 if (strcasecmp(dname, "missing")==0) {
298 if (first_missing > dnum)
299 first_missing = dnum;
300 if (second_missing > dnum && dnum > first_missing)
301 second_missing = dnum;
302 missing_disks ++;
303 continue;
304 }
305 dfd = open(dname, O_RDONLY);
306 if (dfd < 0) {
307 fprintf(stderr, Name ": cannot open %s: %s\n",
308 dname, strerror(errno));
309 exit(2);
310 }
311 if (fstat(dfd, &stb) != 0 ||
312 (stb.st_mode & S_IFMT) != S_IFBLK) {
313 close(dfd);
314 fprintf(stderr, Name ": %s is not a block device\n",
315 dname);
316 exit(2);
317 }
318 close(dfd);
319 info.array.working_disks++;
320 if (dnum < raiddisks)
321 info.array.active_disks++;
322 if (st == NULL) {
323 struct createinfo *ci = conf_get_create_info();
324 if (ci)
325 st = ci->supertype;
326 }
327 if (st == NULL) {
328 /* Need to choose a default metadata, which is different
329 * depending on geometry of array.
330 */
331 int i;
332 char *name = "default";
333 for(i=0; !st && superlist[i]; i++) {
334 st = superlist[i]->match_metadata_desc(name);
335 if (!st)
336 continue;
337 if (do_default_layout)
338 layout = default_layout(st, level, verbose);
339 switch (st->ss->validate_geometry(
340 st, level, layout, raiddisks,
341 &chunk, size*2, dname, &freesize,
342 verbose > 0)) {
343 case -1: /* Not valid, message printed, and not
344 * worth checking any further */
345 exit(2);
346 break;
347 case 0: /* Geometry not valid */
348 free(st);
349 st = NULL;
350 chunk = do_default_chunk ? UnSet : chunk;
351 break;
352 case 1: /* All happy */
353 break;
354 }
355 }
356
357 if (!st) {
358 int dfd = open(dname, O_RDONLY|O_EXCL);
359 if (dfd < 0) {
360 fprintf(stderr, Name ": cannot open %s: %s\n",
361 dname, strerror(errno));
362 exit(2);
363 }
364 fprintf(stderr, Name ": device %s not suitable "
365 "for any style of array\n",
366 dname);
367 exit(2);
368 }
369 if (st->ss != &super0 ||
370 st->minor_version != 90)
371 did_default = 1;
372 } else {
373 if (do_default_layout)
374 layout = default_layout(st, level, 0);
375 if (!st->ss->validate_geometry(st, level, layout,
376 raiddisks,
377 &chunk, size*2, dname,
378 &freesize,
379 verbose >= 0)) {
380
381 fprintf(stderr,
382 Name ": %s is not suitable for "
383 "this array.\n",
384 dname);
385 fail = 1;
386 continue;
387 }
388 }
389
390 freesize /= 2; /* convert to K */
391 if (chunk && chunk != UnSet) {
392 /* round to chunk size */
393 freesize = freesize & ~(chunk-1);
394 if (do_default_chunk) {
395 /* default chunk was just set */
396 if (verbose > 0)
397 fprintf(stderr, Name ": chunk size "
398 "defaults to %dK\n", chunk);
399 size &= ~(unsigned long long)(chunk - 1);
400 do_default_chunk = 0;
401 }
402 }
403
404 if (size && freesize < size) {
405 fprintf(stderr, Name ": %s is smaller than given size."
406 " %lluK < %lluK + metadata\n",
407 dname, freesize, size);
408 fail = 1;
409 continue;
410 }
411 if (maxdisc == NULL || (maxdisc && freesize > maxsize)) {
412 maxdisc = dname;
413 maxsize = freesize;
414 }
415 if (mindisc ==NULL || (mindisc && freesize < minsize)) {
416 mindisc = dname;
417 minsize = freesize;
418 }
419 if (runstop != 1 || verbose >= 0) {
420 int fd = open(dname, O_RDONLY);
421 if (fd <0 ) {
422 fprintf(stderr, Name ": Cannot open %s: %s\n",
423 dname, strerror(errno));
424 fail=1;
425 continue;
426 }
427 warn |= check_ext2(fd, dname);
428 warn |= check_reiser(fd, dname);
429 warn |= check_raid(fd, dname);
430 if (strcmp(st->ss->name, "1.x") == 0 &&
431 st->minor_version >= 1)
432 /* metadata at front */
433 warn |= check_partitions(fd, dname, 0, 0);
434 else if (level == 1 || level == LEVEL_CONTAINER
435 || (level == 0 && raiddisks == 1))
436 /* partitions could be meaningful */
437 warn |= check_partitions(fd, dname, freesize*2, size*2);
438 else
439 /* partitions cannot be meaningful */
440 warn |= check_partitions(fd, dname, 0, 0);
441 if (strcmp(st->ss->name, "1.x") == 0 &&
442 st->minor_version >= 1 &&
443 did_default &&
444 level == 1 &&
445 (warn & 1024) == 0) {
446 warn |= 1024;
447 fprintf(stderr, Name ": Note: this array has metadata at the start and\n"
448 " may not be suitable as a boot device. If you plan to\n"
449 " store '/boot' on this device please ensure that\n"
450 " your boot-loader understands md/v1.x metadata, or use\n"
451 " --metadata=0.90\n");
452 }
453 close(fd);
454 }
455 }
456 if (raiddisks + sparedisks > st->max_devs) {
457 fprintf(stderr, Name ": Too many devices:"
458 " %s metadata only supports %d\n",
459 st->ss->name, st->max_devs);
460 return 1;
461 }
462 if (have_container)
463 info.array.working_disks = raiddisks;
464 if (fail) {
465 fprintf(stderr, Name ": create aborted\n");
466 return 1;
467 }
468 if (size == 0) {
469 if (mindisc == NULL && !have_container) {
470 fprintf(stderr, Name ": no size and no drives given - aborting create.\n");
471 return 1;
472 }
473 if (level > 0 || level == LEVEL_MULTIPATH
474 || level == LEVEL_FAULTY
475 || st->ss->external ) {
476 /* size is meaningful */
477 if (!st->ss->validate_geometry(st, level, layout,
478 raiddisks,
479 &chunk, minsize*2,
480 NULL, NULL, 0)) {
481 fprintf(stderr, Name ": devices too large for RAID level %d\n", level);
482 return 1;
483 }
484 size = minsize;
485 if (verbose > 0)
486 fprintf(stderr, Name ": size set to %lluK\n", size);
487 }
488 }
489 if (!have_container && level > 0 && ((maxsize-size)*100 > maxsize)) {
490 if (runstop != 1 || verbose >= 0)
491 fprintf(stderr, Name ": largest drive (%s) exceeds size (%lluK) by more than 1%%\n",
492 maxdisc, size);
493 warn = 1;
494 }
495
496 if (st->ss->detail_platform && st->ss->detail_platform(0, 1) != 0) {
497 if (runstop != 1 || verbose >= 0)
498 fprintf(stderr, Name ": %s unable to enumerate platform support\n"
499 " array may not be compatible with hardware/firmware\n",
500 st->ss->name);
501 warn = 1;
502 }
503
504 if (warn) {
505 if (runstop!= 1) {
506 if (!ask("Continue creating array? ")) {
507 fprintf(stderr, Name ": create aborted.\n");
508 return 1;
509 }
510 } else {
511 if (verbose > 0)
512 fprintf(stderr, Name ": creation continuing despite oddities due to --run\n");
513 }
514 }
515
516 /* If this is raid4/5, we want to configure the last active slot
517 * as missing, so that a reconstruct happens (faster than re-parity)
518 * FIX: Can we do this for raid6 as well?
519 */
520 if (st->ss->external == 0 &&
521 assume_clean==0 && force == 0 && first_missing >= raiddisks) {
522 switch ( level ) {
523 case 4:
524 case 5:
525 insert_point = raiddisks-1;
526 sparedisks++;
527 info.array.active_disks--;
528 missing_disks++;
529 break;
530 default:
531 break;
532 }
533 }
534 /* For raid6, if creating with 1 missing drive, make a good drive
535 * into a spare, else the create will fail
536 */
537 if (assume_clean == 0 && force == 0 && first_missing < raiddisks &&
538 st->ss->external == 0 &&
539 second_missing >= raiddisks && level == 6) {
540 insert_point = raiddisks - 1;
541 if (insert_point == first_missing)
542 insert_point--;
543 sparedisks ++;
544 info.array.active_disks--;
545 missing_disks++;
546 }
547
548 if (level <= 0 && first_missing < subdevs * 2) {
549 fprintf(stderr,
550 Name ": This level does not support missing devices\n");
551 return 1;
552 }
553
554 /* We need to create the device */
555 map_lock(&map);
556 mdfd = create_mddev(mddev, name, autof, LOCAL, chosen_name);
557 if (mdfd < 0) {
558 map_unlock(&map);
559 return 1;
560 }
561 /* verify if chosen_name is not in use,
562 * it could be in conflict with already existing device
563 * e.g. container, array
564 */
565 if (strncmp(chosen_name, "/dev/md/", 8) == 0
566 && map_by_name(&map, chosen_name+8) != NULL) {
567 fprintf(stderr, Name ": Array name %s is in use already.\n",
568 chosen_name);
569 close(mdfd);
570 map_unlock(&map);
571 return 1;
572 }
573 mddev = chosen_name;
574
575 vers = md_get_version(mdfd);
576 if (vers < 9000) {
577 fprintf(stderr, Name ": Create requires md driver version 0.90.0 or later\n");
578 goto abort_locked;
579 } else {
580 mdu_array_info_t inf;
581 memset(&inf, 0, sizeof(inf));
582 ioctl(mdfd, GET_ARRAY_INFO, &inf);
583 if (inf.working_disks != 0) {
584 fprintf(stderr, Name ": another array by this name"
585 " is already running.\n");
586 goto abort_locked;
587 }
588 }
589
590 /* Ok, lets try some ioctls */
591
592 info.array.level = level;
593 info.array.size = size;
594 info.array.raid_disks = raiddisks;
595 /* The kernel should *know* what md_minor we are dealing
596 * with, but it chooses to trust me instead. Sigh
597 */
598 info.array.md_minor = 0;
599 if (fstat(mdfd, &stb)==0)
600 info.array.md_minor = minor(stb.st_rdev);
601 info.array.not_persistent = 0;
602
603 if ( ( (level == 4 || level == 5) &&
604 (insert_point < raiddisks || first_missing < raiddisks) )
605 ||
606 ( level == 6 && (insert_point < raiddisks
607 || second_missing < raiddisks))
608 ||
609 ( level <= 0 )
610 ||
611 assume_clean
612 ) {
613 info.array.state = 1; /* clean, but one+ drive will be missing*/
614 info.resync_start = MaxSector;
615 } else {
616 info.array.state = 0; /* not clean, but no errors */
617 info.resync_start = 0;
618 }
619 if (level == 10) {
620 /* for raid10, the bitmap size is the capacity of the array,
621 * which is array.size * raid_disks / ncopies;
622 * .. but convert to sectors.
623 */
624 int ncopies = ((layout>>8) & 255) * (layout & 255);
625 bitmapsize = (unsigned long long)size * raiddisks / ncopies * 2;
626 /* printf("bms=%llu as=%d rd=%d nc=%d\n", bitmapsize, size, raiddisks, ncopies);*/
627 } else
628 bitmapsize = (unsigned long long)size * 2;
629
630 /* There is lots of redundancy in these disk counts,
631 * raid_disks is the most meaningful value
632 * it describes the geometry of the array
633 * it is constant
634 * nr_disks is total number of used slots.
635 * it should be raid_disks+spare_disks
636 * spare_disks is the number of extra disks present
637 * see above
638 * active_disks is the number of working disks in
639 * active slots. (With raid_disks)
640 * working_disks is the total number of working disks,
641 * including spares
642 * failed_disks is the number of disks marked failed
643 *
644 * Ideally, the kernel would keep these (except raid_disks)
645 * up-to-date as we ADD_NEW_DISK, but it doesn't (yet).
646 * So for now, we assume that all raid and spare
647 * devices will be given.
648 */
649 info.array.spare_disks=sparedisks;
650 info.array.failed_disks=missing_disks;
651 info.array.nr_disks = info.array.working_disks
652 + info.array.failed_disks;
653 info.array.layout = layout;
654 info.array.chunk_size = chunk*1024;
655
656 if (name == NULL || *name == 0) {
657 /* base name on mddev */
658 /* /dev/md0 -> 0
659 * /dev/md_d0 -> d0
660 * /dev/md/1 -> 1
661 * /dev/md/d1 -> d1
662 * /dev/md/home -> home
663 * /dev/mdhome -> home
664 */
665 /* FIXME compare this with rules in create_mddev */
666 name = strrchr(mddev, '/');
667 if (name) {
668 name++;
669 if (strncmp(name, "md_d", 4)==0 &&
670 strlen(name) > 4 &&
671 isdigit(name[4]) &&
672 (name-mddev) == 5 /* /dev/ */)
673 name += 3;
674 else if (strncmp(name, "md", 2)==0 &&
675 strlen(name) > 2 &&
676 isdigit(name[2]) &&
677 (name-mddev) == 5 /* /dev/ */)
678 name += 2;
679 }
680 }
681 if (!st->ss->init_super(st, &info.array, size, name, homehost, uuid))
682 goto abort_locked;
683
684 total_slots = info.array.nr_disks;
685 st->ss->getinfo_super(st, &info, NULL);
686 sysfs_init(&info, mdfd, 0);
687
688 if (did_default && verbose >= 0) {
689 if (is_subarray(info.text_version)) {
690 int dnum = devname2devnum(info.text_version+1);
691 char *path;
692 int mdp = get_mdp_major();
693 struct mdinfo *mdi;
694 if (dnum > 0)
695 path = map_dev(MD_MAJOR, dnum, 1);
696 else
697 path = map_dev(mdp, (-1-dnum)<< 6, 1);
698
699 mdi = sysfs_read(-1, dnum, GET_VERSION);
700
701 fprintf(stderr, Name ": Creating array inside "
702 "%s container %s\n",
703 mdi?mdi->text_version:"managed", path);
704 sysfs_free(mdi);
705 } else
706 fprintf(stderr, Name ": Defaulting to version"
707 " %s metadata\n", info.text_version);
708 }
709
710 map_update(&map, fd2devnum(mdfd), info.text_version,
711 info.uuid, chosen_name);
712 map_unlock(&map);
713
714 if (bitmap_file && vers < 9003) {
715 major_num = BITMAP_MAJOR_HOSTENDIAN;
716 #ifdef __BIG_ENDIAN
717 fprintf(stderr, Name ": Warning - bitmaps created on this kernel are not portable\n"
718 " between different architectured. Consider upgrading the Linux kernel.\n");
719 #endif
720 }
721
722 if (bitmap_file && strcmp(bitmap_file, "internal")==0) {
723 if ((vers%100) < 2) {
724 fprintf(stderr, Name ": internal bitmaps not supported by this kernel.\n");
725 goto abort;
726 }
727 if (!st->ss->add_internal_bitmap) {
728 fprintf(stderr, Name ": internal bitmaps not supported with %s metadata\n",
729 st->ss->name);
730 goto abort;
731 }
732 if (!st->ss->add_internal_bitmap(st, &bitmap_chunk,
733 delay, write_behind,
734 bitmapsize, 1, major_num)) {
735 fprintf(stderr, Name ": Given bitmap chunk size not supported.\n");
736 goto abort;
737 }
738 bitmap_file = NULL;
739 }
740
741
742 sysfs_init(&info, mdfd, 0);
743
744 if (st->ss->external && st->container_dev != NoMdDev) {
745 /* member */
746
747 /* When creating a member, we need to be careful
748 * to negotiate with mdmon properly.
749 * If it is already running, we cannot write to
750 * the devices and must ask it to do that part.
751 * If it isn't running, we write to the devices,
752 * and then start it.
753 * We hold an exclusive open on the container
754 * device to make sure mdmon doesn't exit after
755 * we checked that it is running.
756 *
757 * For now, fail if it is already running.
758 */
759 container_fd = open_dev_excl(st->container_dev);
760 if (container_fd < 0) {
761 fprintf(stderr, Name ": Cannot get exclusive "
762 "open on container - weird.\n");
763 goto abort;
764 }
765 if (mdmon_running(st->container_dev)) {
766 if (verbose)
767 fprintf(stderr, Name ": reusing mdmon "
768 "for %s.\n",
769 devnum2devname(st->container_dev));
770 st->update_tail = &st->updates;
771 } else
772 need_mdmon = 1;
773 }
774 rv = set_array_info(mdfd, st, &info);
775 if (rv) {
776 fprintf(stderr, Name ": failed to set array info for %s: %s\n",
777 mddev, strerror(errno));
778 goto abort;
779 }
780
781 if (bitmap_file) {
782 int uuid[4];
783
784 st->ss->uuid_from_super(st, uuid);
785 if (CreateBitmap(bitmap_file, force, (char*)uuid, bitmap_chunk,
786 delay, write_behind,
787 bitmapsize,
788 major_num)) {
789 goto abort;
790 }
791 bitmap_fd = open(bitmap_file, O_RDWR);
792 if (bitmap_fd < 0) {
793 fprintf(stderr, Name ": weird: %s cannot be openned\n",
794 bitmap_file);
795 goto abort;
796 }
797 if (ioctl(mdfd, SET_BITMAP_FILE, bitmap_fd) < 0) {
798 fprintf(stderr, Name ": Cannot set bitmap file for %s: %s\n",
799 mddev, strerror(errno));
800 goto abort;
801 }
802 }
803
804 infos = malloc(sizeof(*infos) * total_slots);
805 if (!infos) {
806 fprintf(stderr, Name ": Unable to allocate memory\n");
807 goto abort;
808 }
809
810 for (pass=1; pass <=2 ; pass++) {
811 struct mddev_dev *moved_disk = NULL; /* the disk that was moved out of the insert point */
812
813 for (dnum=0, dv = devlist ; dv ;
814 dv=(dv->next)?(dv->next):moved_disk, dnum++) {
815 int fd;
816 struct stat stb;
817 struct mdinfo *inf = &infos[dnum];
818
819 if (dnum >= total_slots)
820 abort();
821 if (dnum == insert_point) {
822 moved_disk = dv;
823 continue;
824 }
825 if (strcasecmp(dv->devname, "missing")==0)
826 continue;
827 if (have_container)
828 moved_disk = NULL;
829 if (have_container && dnum < info.array.raid_disks - 1)
830 /* repeatedly use the container */
831 moved_disk = dv;
832
833 switch(pass) {
834 case 1:
835 *inf = info;
836
837 inf->disk.number = dnum;
838 inf->disk.raid_disk = dnum;
839 if (inf->disk.raid_disk < raiddisks)
840 inf->disk.state = (1<<MD_DISK_ACTIVE) |
841 (1<<MD_DISK_SYNC);
842 else
843 inf->disk.state = 0;
844
845 if (dv->writemostly == 1)
846 inf->disk.state |= (1<<MD_DISK_WRITEMOSTLY);
847
848 if (have_container)
849 fd = -1;
850 else {
851 if (st->ss->external &&
852 st->container_dev != NoMdDev)
853 fd = open(dv->devname, O_RDWR);
854 else
855 fd = open(dv->devname, O_RDWR|O_EXCL);
856
857 if (fd < 0) {
858 fprintf(stderr, Name ": failed to open %s "
859 "after earlier success - aborting\n",
860 dv->devname);
861 goto abort;
862 }
863 fstat(fd, &stb);
864 inf->disk.major = major(stb.st_rdev);
865 inf->disk.minor = minor(stb.st_rdev);
866 }
867 if (fd >= 0)
868 remove_partitions(fd);
869 if (st->ss->add_to_super(st, &inf->disk,
870 fd, dv->devname)) {
871 ioctl(mdfd, STOP_ARRAY, NULL);
872 goto abort;
873 }
874 st->ss->getinfo_super(st, inf, NULL);
875 safe_mode_delay = inf->safe_mode_delay;
876
877 if (have_container && verbose > 0)
878 fprintf(stderr, Name ": Using %s for device %d\n",
879 map_dev(inf->disk.major,
880 inf->disk.minor,
881 0), dnum);
882
883 if (!have_container) {
884 /* getinfo_super might have lost these ... */
885 inf->disk.major = major(stb.st_rdev);
886 inf->disk.minor = minor(stb.st_rdev);
887 }
888 break;
889 case 2:
890 inf->errors = 0;
891
892 rv = add_disk(mdfd, st, &info, inf);
893
894 if (rv) {
895 fprintf(stderr,
896 Name ": ADD_NEW_DISK for %s "
897 "failed: %s\n",
898 dv->devname, strerror(errno));
899 goto abort;
900 }
901 break;
902 }
903 if (!have_container &&
904 dv == moved_disk && dnum != insert_point) break;
905 }
906 if (pass == 1) {
907 struct mdinfo info_new;
908 struct map_ent *me = NULL;
909
910 /* check to see if the uuid has changed due to these
911 * metadata changes, and if so update the member array
912 * and container uuid. Note ->write_init_super clears
913 * the subarray cursor such that ->getinfo_super once
914 * again returns container info.
915 */
916 map_lock(&map);
917 st->ss->getinfo_super(st, &info_new, NULL);
918 if (st->ss->external && level != LEVEL_CONTAINER &&
919 !same_uuid(info_new.uuid, info.uuid, 0)) {
920 map_update(&map, fd2devnum(mdfd),
921 info_new.text_version,
922 info_new.uuid, chosen_name);
923 me = map_by_devnum(&map, st->container_dev);
924 }
925
926 if (st->ss->write_init_super(st)) {
927 st->ss->free_super(st);
928 goto abort_locked;
929 }
930
931 /* update parent container uuid */
932 if (me) {
933 char *path = strdup(me->path);
934
935 st->ss->getinfo_super(st, &info_new, NULL);
936 map_update(&map, st->container_dev,
937 info_new.text_version,
938 info_new.uuid, path);
939 free(path);
940 }
941 map_unlock(&map);
942
943 flush_metadata_updates(st);
944 st->ss->free_super(st);
945 }
946 }
947 free(infos);
948
949 if (level == LEVEL_CONTAINER) {
950 /* No need to start. But we should signal udev to
951 * create links */
952 sysfs_uevent(&info, "change");
953 if (verbose >= 0)
954 fprintf(stderr, Name ": container %s prepared.\n", mddev);
955 wait_for(chosen_name, mdfd);
956 } else if (runstop == 1 || subdevs >= raiddisks) {
957 if (st->ss->external) {
958 int err;
959 switch(level) {
960 case LEVEL_LINEAR:
961 case LEVEL_MULTIPATH:
962 case 0:
963 err = sysfs_set_str(&info, NULL, "array_state",
964 "active");
965 need_mdmon = 0;
966 break;
967 default:
968 err = sysfs_set_str(&info, NULL, "array_state",
969 "readonly");
970 break;
971 }
972 sysfs_set_safemode(&info, safe_mode_delay);
973 if (err) {
974 fprintf(stderr, Name ": failed to"
975 " activate array.\n");
976 ioctl(mdfd, STOP_ARRAY, NULL);
977 goto abort;
978 }
979 } else {
980 /* param is not actually used */
981 mdu_param_t param;
982 if (ioctl(mdfd, RUN_ARRAY, &param)) {
983 fprintf(stderr, Name ": RUN_ARRAY failed: %s\n",
984 strerror(errno));
985 if (info.array.chunk_size & (info.array.chunk_size-1)) {
986 fprintf(stderr, " : Problem may be that "
987 "chunk size is not a power of 2\n");
988 }
989 ioctl(mdfd, STOP_ARRAY, NULL);
990 goto abort;
991 }
992 }
993 if (verbose >= 0)
994 fprintf(stderr, Name ": array %s started.\n", mddev);
995 if (st->ss->external && st->container_dev != NoMdDev) {
996 if (need_mdmon)
997 start_mdmon(st->container_dev);
998
999 ping_monitor_by_id(st->container_dev);
1000 close(container_fd);
1001 }
1002 wait_for(chosen_name, mdfd);
1003 } else {
1004 fprintf(stderr, Name ": not starting array - not enough devices.\n");
1005 }
1006 close(mdfd);
1007 return 0;
1008
1009 abort:
1010 map_lock(&map);
1011 abort_locked:
1012 map_remove(&map, fd2devnum(mdfd));
1013 map_unlock(&map);
1014
1015 if (mdfd >= 0)
1016 close(mdfd);
1017 return 1;
1018 }
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