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1 /*
2 * mdadm - manage Linux "md" devices aka RAID arrays.
3 *
4 * Copyright (C) 2001-2013 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 pr_err("layout defaults to n2\n");
46 break;
47 case 5:
48 case 6:
49 layout = map_name(r5layout, "default");
50 if (verbose > 0)
51 pr_err("layout defaults to %s\n", map_num(r5layout, layout));
52 break;
53 case LEVEL_FAULTY:
54 layout = map_name(faultylayout, "default");
55
56 if (verbose > 0)
57 pr_err("layout defaults to %s\n", map_num(faultylayout, layout));
58 break;
59 }
60
61 return layout;
62 }
63
64 int Create(struct supertype *st, char *mddev,
65 char *name, int *uuid,
66 int subdevs, struct mddev_dev *devlist,
67 struct shape *s,
68 struct context *c, unsigned long long data_offset)
69 {
70 /*
71 * Create a new raid array.
72 *
73 * First check that necessary details are available
74 * (i.e. level, raid-disks)
75 *
76 * Then check each disk to see what might be on it
77 * and report anything interesting.
78 *
79 * If anything looks odd, and runstop not set,
80 * abort.
81 *
82 * SET_ARRAY_INFO and ADD_NEW_DISK, and
83 * if runstop==run, or raiddisks disks were used,
84 * RUN_ARRAY
85 */
86 int mdfd;
87 unsigned long long minsize=0, maxsize=0;
88 char *mindisc = NULL;
89 char *maxdisc = NULL;
90 int dnum;
91 struct mddev_dev *dv;
92 int fail=0, warn=0;
93 struct stat stb;
94 int first_missing = subdevs * 2;
95 int second_missing = subdevs * 2;
96 int missing_disks = 0;
97 int insert_point = subdevs * 2; /* where to insert a missing drive */
98 int total_slots;
99 int pass;
100 int vers;
101 int rv;
102 int bitmap_fd;
103 int have_container = 0;
104 int container_fd = -1;
105 int need_mdmon = 0;
106 unsigned long long bitmapsize;
107 struct mdinfo info, *infos;
108 int did_default = 0;
109 int do_default_layout = 0;
110 int do_default_chunk = 0;
111 unsigned long safe_mode_delay = 0;
112 char chosen_name[1024];
113 struct map_ent *map = NULL;
114 unsigned long long newsize;
115
116 int major_num = BITMAP_MAJOR_HI;
117
118 memset(&info, 0, sizeof(info));
119 if (s->level == UnSet && st && st->ss->default_geometry)
120 st->ss->default_geometry(st, &s->level, NULL, NULL);
121 if (s->level == UnSet) {
122 pr_err("a RAID level is needed to create an array.\n");
123 return 1;
124 }
125 if (s->raiddisks < 4 && s->level == 6) {
126 pr_err("at least 4 raid-devices needed for level 6\n");
127 return 1;
128 }
129 if (s->raiddisks > 256 && s->level == 6) {
130 pr_err("no more than 256 raid-devices supported for level 6\n");
131 return 1;
132 }
133 if (s->raiddisks < 2 && s->level >= 4) {
134 pr_err("at least 2 raid-devices needed for level 4 or 5\n");
135 return 1;
136 }
137 if (s->level <= 0 && s->sparedisks) {
138 pr_err("This level does not support spare devices\n");
139 return 1;
140 }
141
142 if (subdevs == 1 && strcmp(devlist->devname, "missing") != 0) {
143 /* If given a single device, it might be a container, and we can
144 * extract a device list from there
145 */
146 mdu_array_info_t inf;
147 int fd;
148
149 memset(&inf, 0, sizeof(inf));
150 fd = open(devlist->devname, O_RDONLY);
151 if (fd >= 0 &&
152 ioctl(fd, GET_ARRAY_INFO, &inf) == 0 &&
153 inf.raid_disks == 0) {
154 /* yep, looks like a container */
155 if (st) {
156 rv = st->ss->load_container(st, fd,
157 devlist->devname);
158 if (rv == 0)
159 have_container = 1;
160 } else {
161 st = super_by_fd(fd, NULL);
162 if (st && !(rv = st->ss->
163 load_container(st, fd,
164 devlist->devname)))
165 have_container = 1;
166 else
167 st = NULL;
168 }
169 if (have_container) {
170 subdevs = s->raiddisks;
171 first_missing = subdevs * 2;
172 second_missing = subdevs * 2;
173 insert_point = subdevs * 2;
174 }
175 }
176 if (fd >= 0)
177 close(fd);
178 }
179 if (st && st->ss->external && s->sparedisks) {
180 pr_err("This metadata type does not support spare disks at create time\n");
181 return 1;
182 }
183 if (subdevs > s->raiddisks+s->sparedisks) {
184 pr_err("You have listed more devices (%d) than are in the array(%d)!\n", subdevs, s->raiddisks+s->sparedisks);
185 return 1;
186 }
187 if (!have_container && subdevs < s->raiddisks+s->sparedisks) {
188 pr_err("You haven't given enough devices (real or missing) to create this array\n");
189 return 1;
190 }
191 if (s->bitmap_file && s->level <= 0) {
192 pr_err("bitmaps not meaningful with level %s\n",
193 map_num(pers, s->level)?:"given");
194 return 1;
195 }
196
197 /* now set some defaults */
198
199 if (s->layout == UnSet) {
200 do_default_layout = 1;
201 s->layout = default_layout(st, s->level, c->verbose);
202 }
203
204 if (s->level == 10)
205 /* check layout fits in array*/
206 if ((s->layout&255) * ((s->layout>>8)&255) > s->raiddisks) {
207 pr_err("that layout requires at least %d devices\n",
208 (s->layout&255) * ((s->layout>>8)&255));
209 return 1;
210 }
211
212 switch(s->level) {
213 case 4:
214 case 5:
215 case 10:
216 case 6:
217 case 0:
218 if (s->chunk == 0 || s->chunk == UnSet) {
219 s->chunk = UnSet;
220 do_default_chunk = 1;
221 /* chunk will be set later */
222 }
223 break;
224 case LEVEL_LINEAR:
225 /* a chunksize of zero 0s perfectly valid (and preferred) since 2.6.16 */
226 if (get_linux_version() < 2006016 && s->chunk == 0) {
227 s->chunk = 64;
228 if (c->verbose > 0)
229 pr_err("chunk size defaults to 64K\n");
230 }
231 break;
232 case 1:
233 case LEVEL_FAULTY:
234 case LEVEL_MULTIPATH:
235 case LEVEL_CONTAINER:
236 if (s->chunk) {
237 s->chunk = 0;
238 if (c->verbose > 0)
239 pr_err("chunk size ignored for this level\n");
240 }
241 break;
242 default:
243 pr_err("unknown level %d\n", s->level);
244 return 1;
245 }
246 if (s->size == MAX_SIZE)
247 /* use '0' to mean 'max' now... */
248 s->size = 0;
249 if (s->size && s->chunk && s->chunk != UnSet)
250 s->size &= ~(unsigned long long)(s->chunk - 1);
251 newsize = s->size * 2;
252 if (st && ! st->ss->validate_geometry(st, s->level, s->layout, s->raiddisks,
253 &s->chunk, s->size*2,
254 data_offset, NULL,
255 &newsize, c->verbose>=0))
256 return 1;
257
258 if (s->chunk && s->chunk != UnSet) {
259 newsize &= ~(unsigned long long)(s->chunk*2 - 1);
260 if (do_default_chunk) {
261 /* default chunk was just set */
262 if (c->verbose > 0)
263 pr_err("chunk size defaults to %dK\n", s->chunk);
264 s->size &= ~(unsigned long long)(s->chunk - 1);
265 do_default_chunk = 0;
266 }
267 }
268
269 if (s->size == 0) {
270 s->size = newsize / 2;
271 if (s->level == 1)
272 /* If this is ever reshaped to RAID5, we will
273 * need a chunksize. So round it off a bit
274 * now just to be safe
275 */
276 s->size &= ~(64ULL-1);
277
278 if (s->size && c->verbose > 0)
279 pr_err("setting size to %lluK\n", s->size);
280 }
281
282 /* now look at the subdevs */
283 info.array.active_disks = 0;
284 info.array.working_disks = 0;
285 dnum = 0;
286 for (dv = devlist; dv ; dv = dv->next)
287 if (data_offset == VARIABLE_OFFSET)
288 dv->data_offset = INVALID_SECTORS;
289 else
290 dv->data_offset = data_offset;
291
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 char *doff;
297
298 if (strcasecmp(dname, "missing")==0) {
299 if (first_missing > dnum)
300 first_missing = dnum;
301 if (second_missing > dnum && dnum > first_missing)
302 second_missing = dnum;
303 missing_disks ++;
304 continue;
305 }
306 if (data_offset == VARIABLE_OFFSET) {
307 doff = strchr(dname, ':');
308 if (doff) {
309 *doff++ = 0;
310 dv->data_offset = parse_size(doff);
311 } else
312 dv->data_offset = INVALID_SECTORS;
313 } else
314 dv->data_offset = data_offset;
315
316 dfd = open(dname, O_RDONLY);
317 if (dfd < 0) {
318 pr_err("cannot open %s: %s\n",
319 dname, strerror(errno));
320 exit(2);
321 }
322 if (fstat(dfd, &stb) != 0 ||
323 (stb.st_mode & S_IFMT) != S_IFBLK) {
324 close(dfd);
325 pr_err("%s is not a block device\n",
326 dname);
327 exit(2);
328 }
329 close(dfd);
330 info.array.working_disks++;
331 if (dnum < s->raiddisks)
332 info.array.active_disks++;
333 if (st == NULL) {
334 struct createinfo *ci = conf_get_create_info();
335 if (ci)
336 st = ci->supertype;
337 }
338 if (st == NULL) {
339 /* Need to choose a default metadata, which is different
340 * depending on geometry of array.
341 */
342 int i;
343 char *name = "default";
344 for(i=0; !st && superlist[i]; i++) {
345 st = superlist[i]->match_metadata_desc(name);
346 if (!st)
347 continue;
348 if (do_default_layout)
349 s->layout = default_layout(st, s->level, c->verbose);
350 switch (st->ss->validate_geometry(
351 st, s->level, s->layout, s->raiddisks,
352 &s->chunk, s->size*2,
353 dv->data_offset, dname,
354 &freesize, c->verbose > 0)) {
355 case -1: /* Not valid, message printed, and not
356 * worth checking any further */
357 exit(2);
358 break;
359 case 0: /* Geometry not valid */
360 free(st);
361 st = NULL;
362 s->chunk = do_default_chunk ? UnSet : s->chunk;
363 break;
364 case 1: /* All happy */
365 break;
366 }
367 }
368
369 if (!st) {
370 int dfd = open(dname, O_RDONLY|O_EXCL);
371 if (dfd < 0) {
372 pr_err("cannot open %s: %s\n",
373 dname, strerror(errno));
374 exit(2);
375 }
376 pr_err("device %s not suitable for any style of array\n",
377 dname);
378 exit(2);
379 }
380 if (st->ss != &super0 ||
381 st->minor_version != 90)
382 did_default = 1;
383 } else {
384 if (do_default_layout)
385 s->layout = default_layout(st, s->level, 0);
386 if (!st->ss->validate_geometry(st, s->level, s->layout,
387 s->raiddisks,
388 &s->chunk, s->size*2,
389 dv->data_offset,
390 dname, &freesize,
391 c->verbose >= 0)) {
392
393 pr_err("%s is not suitable for this array.\n",
394 dname);
395 fail = 1;
396 continue;
397 }
398 }
399
400 freesize /= 2; /* convert to K */
401 if (s->chunk && s->chunk != UnSet) {
402 /* round to chunk size */
403 freesize = freesize & ~(s->chunk-1);
404 if (do_default_chunk) {
405 /* default chunk was just set */
406 if (c->verbose > 0)
407 pr_err("chunk size defaults to %dK\n", s->chunk);
408 s->size &= ~(unsigned long long)(s->chunk - 1);
409 do_default_chunk = 0;
410 }
411 }
412 if (!freesize) {
413 pr_err("no free space left on %s\n", dname);
414 fail = 1;
415 continue;
416 }
417
418 if (s->size && freesize < s->size) {
419 pr_err("%s is smaller than given size. %lluK < %lluK + metadata\n",
420 dname, freesize, s->size);
421 fail = 1;
422 continue;
423 }
424 if (maxdisc == NULL || (maxdisc && freesize > maxsize)) {
425 maxdisc = dname;
426 maxsize = freesize;
427 }
428 if (mindisc ==NULL || (mindisc && freesize < minsize)) {
429 mindisc = dname;
430 minsize = freesize;
431 }
432 if (c->runstop != 1 || c->verbose >= 0) {
433 int fd = open(dname, O_RDONLY);
434 if (fd <0 ) {
435 pr_err("Cannot open %s: %s\n",
436 dname, strerror(errno));
437 fail=1;
438 continue;
439 }
440 warn |= check_ext2(fd, dname);
441 warn |= check_reiser(fd, dname);
442 warn |= check_raid(fd, dname);
443 if (strcmp(st->ss->name, "1.x") == 0 &&
444 st->minor_version >= 1)
445 /* metadata at front */
446 warn |= check_partitions(fd, dname, 0, 0);
447 else if (s->level == 1 || s->level == LEVEL_CONTAINER
448 || (s->level == 0 && s->raiddisks == 1))
449 /* partitions could be meaningful */
450 warn |= check_partitions(fd, dname, freesize*2, s->size*2);
451 else
452 /* partitions cannot be meaningful */
453 warn |= check_partitions(fd, dname, 0, 0);
454 if (strcmp(st->ss->name, "1.x") == 0 &&
455 st->minor_version >= 1 &&
456 did_default &&
457 s->level == 1 &&
458 (warn & 1024) == 0) {
459 warn |= 1024;
460 pr_err("Note: this array has metadata at the start and\n"
461 " may not be suitable as a boot device. If you plan to\n"
462 " store '/boot' on this device please ensure that\n"
463 " your boot-loader understands md/v1.x metadata, or use\n"
464 " --metadata=0.90\n");
465 }
466 close(fd);
467 }
468 }
469 if (s->raiddisks + s->sparedisks > st->max_devs) {
470 pr_err("Too many devices: %s metadata only supports %d\n",
471 st->ss->name, st->max_devs);
472 return 1;
473 }
474 if (have_container)
475 info.array.working_disks = s->raiddisks;
476 if (fail) {
477 pr_err("create aborted\n");
478 return 1;
479 }
480 if (s->size == 0) {
481 if (mindisc == NULL && !have_container) {
482 pr_err("no size and no drives given - aborting create.\n");
483 return 1;
484 }
485 if (s->level > 0 || s->level == LEVEL_MULTIPATH
486 || s->level == LEVEL_FAULTY
487 || st->ss->external ) {
488 /* size is meaningful */
489 if (!st->ss->validate_geometry(st, s->level, s->layout,
490 s->raiddisks,
491 &s->chunk, minsize*2,
492 data_offset,
493 NULL, NULL, 0)) {
494 pr_err("devices too large for RAID level %d\n", s->level);
495 return 1;
496 }
497 s->size = minsize;
498 if (s->level == 1)
499 /* If this is ever reshaped to RAID5, we will
500 * need a chunksize. So round it off a bit
501 * now just to be safe
502 */
503 s->size &= ~(64ULL-1);
504 if (c->verbose > 0)
505 pr_err("size set to %lluK\n", s->size);
506 }
507 }
508
509 if (!s->bitmap_file &&
510 s->level >= 1 &&
511 st->ss->add_internal_bitmap &&
512 (s->write_behind || s->size > 100*1024*1024ULL)) {
513 if (c->verbose > 0)
514 pr_err("automatically enabling write-intent bitmap on large array\n");
515 s->bitmap_file = "internal";
516 }
517 if (s->bitmap_file && strcmp(s->bitmap_file, "none") == 0)
518 s->bitmap_file = NULL;
519
520 if (!have_container && s->level > 0 && ((maxsize-s->size)*100 > maxsize)) {
521 if (c->runstop != 1 || c->verbose >= 0)
522 pr_err("largest drive (%s) exceeds size (%lluK) by more than 1%%\n",
523 maxdisc, s->size);
524 warn = 1;
525 }
526
527 if (st->ss->detail_platform && st->ss->detail_platform(0, 1, NULL) != 0) {
528 if (c->runstop != 1 || c->verbose >= 0)
529 pr_err("%s unable to enumerate platform support\n"
530 " array may not be compatible with hardware/firmware\n",
531 st->ss->name);
532 warn = 1;
533 }
534
535 if (warn) {
536 if (c->runstop!= 1) {
537 if (!ask("Continue creating array? ")) {
538 pr_err("create aborted.\n");
539 return 1;
540 }
541 } else {
542 if (c->verbose > 0)
543 pr_err("creation continuing despite oddities due to --run\n");
544 }
545 }
546
547 /* If this is raid4/5, we want to configure the last active slot
548 * as missing, so that a reconstruct happens (faster than re-parity)
549 * FIX: Can we do this for raid6 as well?
550 */
551 if (st->ss->external == 0 &&
552 s->assume_clean==0 && c->force == 0 && first_missing >= s->raiddisks) {
553 switch ( s->level ) {
554 case 4:
555 case 5:
556 insert_point = s->raiddisks-1;
557 s->sparedisks++;
558 info.array.active_disks--;
559 missing_disks++;
560 break;
561 default:
562 break;
563 }
564 }
565 /* For raid6, if creating with 1 missing drive, make a good drive
566 * into a spare, else the create will fail
567 */
568 if (s->assume_clean == 0 && c->force == 0 && first_missing < s->raiddisks &&
569 st->ss->external == 0 &&
570 second_missing >= s->raiddisks && s->level == 6) {
571 insert_point = s->raiddisks - 1;
572 if (insert_point == first_missing)
573 insert_point--;
574 s->sparedisks ++;
575 info.array.active_disks--;
576 missing_disks++;
577 }
578
579 if (s->level <= 0 && first_missing < subdevs * 2) {
580 pr_err("This level does not support missing devices\n");
581 return 1;
582 }
583
584 /* We need to create the device */
585 map_lock(&map);
586 mdfd = create_mddev(mddev, name, c->autof, LOCAL, chosen_name);
587 if (mdfd < 0) {
588 map_unlock(&map);
589 return 1;
590 }
591 /* verify if chosen_name is not in use,
592 * it could be in conflict with already existing device
593 * e.g. container, array
594 */
595 if (strncmp(chosen_name, "/dev/md/", 8) == 0
596 && map_by_name(&map, chosen_name+8) != NULL) {
597 pr_err("Array name %s is in use already.\n",
598 chosen_name);
599 close(mdfd);
600 map_unlock(&map);
601 return 1;
602 }
603 mddev = chosen_name;
604
605 vers = md_get_version(mdfd);
606 if (vers < 9000) {
607 pr_err("Create requires md driver version 0.90.0 or later\n");
608 goto abort_locked;
609 } else {
610 mdu_array_info_t inf;
611 memset(&inf, 0, sizeof(inf));
612 ioctl(mdfd, GET_ARRAY_INFO, &inf);
613 if (inf.working_disks != 0) {
614 pr_err("another array by this name is already running.\n");
615 goto abort_locked;
616 }
617 }
618
619 /* Ok, lets try some ioctls */
620
621 info.array.level = s->level;
622 info.array.size = s->size;
623 info.array.raid_disks = s->raiddisks;
624 /* The kernel should *know* what md_minor we are dealing
625 * with, but it chooses to trust me instead. Sigh
626 */
627 info.array.md_minor = 0;
628 if (fstat(mdfd, &stb)==0)
629 info.array.md_minor = minor(stb.st_rdev);
630 info.array.not_persistent = 0;
631
632 if ( ( (s->level == 4 || s->level == 5) &&
633 (insert_point < s->raiddisks || first_missing < s->raiddisks) )
634 ||
635 ( s->level == 6 && (insert_point < s->raiddisks
636 || second_missing < s->raiddisks))
637 ||
638 ( s->level <= 0 )
639 ||
640 s->assume_clean
641 ) {
642 info.array.state = 1; /* clean, but one+ drive will be missing*/
643 info.resync_start = MaxSector;
644 } else {
645 info.array.state = 0; /* not clean, but no errors */
646 info.resync_start = 0;
647 }
648 if (s->level == 10) {
649 /* for raid10, the bitmap size is the capacity of the array,
650 * which is array.size * raid_disks / ncopies;
651 * .. but convert to sectors.
652 */
653 int ncopies = ((s->layout>>8) & 255) * (s->layout & 255);
654 bitmapsize = s->size * s->raiddisks / ncopies * 2;
655 /* printf("bms=%llu as=%d rd=%d nc=%d\n", bitmapsize, s->size, s->raiddisks, ncopies);*/
656 } else
657 bitmapsize = s->size * 2;
658
659 /* There is lots of redundancy in these disk counts,
660 * raid_disks is the most meaningful value
661 * it describes the geometry of the array
662 * it is constant
663 * nr_disks is total number of used slots.
664 * it should be raid_disks+spare_disks
665 * spare_disks is the number of extra disks present
666 * see above
667 * active_disks is the number of working disks in
668 * active slots. (With raid_disks)
669 * working_disks is the total number of working disks,
670 * including spares
671 * failed_disks is the number of disks marked failed
672 *
673 * Ideally, the kernel would keep these (except raid_disks)
674 * up-to-date as we ADD_NEW_DISK, but it doesn't (yet).
675 * So for now, we assume that all raid and spare
676 * devices will be given.
677 */
678 info.array.spare_disks=s->sparedisks;
679 info.array.failed_disks=missing_disks;
680 info.array.nr_disks = info.array.working_disks
681 + info.array.failed_disks;
682 info.array.layout = s->layout;
683 info.array.chunk_size = s->chunk*1024;
684
685 if (name == NULL || *name == 0) {
686 /* base name on mddev */
687 /* /dev/md0 -> 0
688 * /dev/md_d0 -> d0
689 * /dev/md_foo -> foo
690 * /dev/md/1 -> 1
691 * /dev/md/d1 -> d1
692 * /dev/md/home -> home
693 * /dev/mdhome -> home
694 */
695 /* FIXME compare this with rules in create_mddev */
696 name = strrchr(mddev, '/');
697 if (name) {
698 name++;
699 if (strncmp(name, "md_", 3)==0 &&
700 strlen(name) > 3 &&
701 (name-mddev) == 5 /* /dev/ */)
702 name += 3;
703 else if (strncmp(name, "md", 2)==0 &&
704 strlen(name) > 2 &&
705 isdigit(name[2]) &&
706 (name-mddev) == 5 /* /dev/ */)
707 name += 2;
708 }
709 }
710 if (!st->ss->init_super(st, &info.array, s->size, name, c->homehost, uuid,
711 data_offset))
712 goto abort_locked;
713
714 total_slots = info.array.nr_disks;
715 st->ss->getinfo_super(st, &info, NULL);
716 sysfs_init(&info, mdfd, NULL);
717
718 if (did_default && c->verbose >= 0) {
719 if (is_subarray(info.text_version)) {
720 char devnm[32];
721 char *ep;
722 struct mdinfo *mdi;
723
724 strncpy(devnm, info.text_version+1, 32);
725 devnm[31] = 0;
726 ep = strchr(devnm, '/');
727 if (ep)
728 *ep = 0;
729
730 mdi = sysfs_read(-1, devnm, GET_VERSION);
731
732 pr_err("Creating array inside %s container %s\n",
733 mdi?mdi->text_version:"managed", devnm);
734 sysfs_free(mdi);
735 } else
736 pr_err("Defaulting to version %s metadata\n", info.text_version);
737 }
738
739 map_update(&map, fd2devnm(mdfd), info.text_version,
740 info.uuid, chosen_name);
741 /* Keep map locked until devices have been added to array
742 * to stop another mdadm from finding and using those devices.
743 */
744
745 if (s->bitmap_file && vers < 9003) {
746 major_num = BITMAP_MAJOR_HOSTENDIAN;
747 #ifdef __BIG_ENDIAN
748 pr_err("Warning - bitmaps created on this kernel are not portable\n"
749 " between different architectured. Consider upgrading the Linux kernel.\n");
750 #endif
751 }
752
753 if (s->bitmap_file && strcmp(s->bitmap_file, "internal")==0) {
754 if ((vers%100) < 2) {
755 pr_err("internal bitmaps not supported by this kernel.\n");
756 goto abort_locked;
757 }
758 if (!st->ss->add_internal_bitmap) {
759 pr_err("internal bitmaps not supported with %s metadata\n",
760 st->ss->name);
761 goto abort_locked;
762 }
763 if (!st->ss->add_internal_bitmap(st, &s->bitmap_chunk,
764 c->delay, s->write_behind,
765 bitmapsize, 1, major_num)) {
766 pr_err("Given bitmap chunk size not supported.\n");
767 goto abort_locked;
768 }
769 s->bitmap_file = NULL;
770 }
771
772 sysfs_init(&info, mdfd, NULL);
773
774 if (st->ss->external && st->container_devnm[0]) {
775 /* member */
776
777 /* When creating a member, we need to be careful
778 * to negotiate with mdmon properly.
779 * If it is already running, we cannot write to
780 * the devices and must ask it to do that part.
781 * If it isn't running, we write to the devices,
782 * and then start it.
783 * We hold an exclusive open on the container
784 * device to make sure mdmon doesn't exit after
785 * we checked that it is running.
786 *
787 * For now, fail if it is already running.
788 */
789 container_fd = open_dev_excl(st->container_devnm);
790 if (container_fd < 0) {
791 pr_err("Cannot get exclusive open on container - weird.\n");
792 goto abort_locked;
793 }
794 if (mdmon_running(st->container_devnm)) {
795 if (c->verbose)
796 pr_err("reusing mdmon for %s.\n",
797 st->container_devnm);
798 st->update_tail = &st->updates;
799 } else
800 need_mdmon = 1;
801 }
802 rv = set_array_info(mdfd, st, &info);
803 if (rv) {
804 pr_err("failed to set array info for %s: %s\n",
805 mddev, strerror(errno));
806 goto abort_locked;
807 }
808
809 if (s->bitmap_file) {
810 int uuid[4];
811
812 st->ss->uuid_from_super(st, uuid);
813 if (CreateBitmap(s->bitmap_file, c->force, (char*)uuid, s->bitmap_chunk,
814 c->delay, s->write_behind,
815 bitmapsize,
816 major_num)) {
817 goto abort_locked;
818 }
819 bitmap_fd = open(s->bitmap_file, O_RDWR);
820 if (bitmap_fd < 0) {
821 pr_err("weird: %s cannot be openned\n",
822 s->bitmap_file);
823 goto abort_locked;
824 }
825 if (ioctl(mdfd, SET_BITMAP_FILE, bitmap_fd) < 0) {
826 pr_err("Cannot set bitmap file for %s: %s\n",
827 mddev, strerror(errno));
828 goto abort_locked;
829 }
830 }
831
832 infos = xmalloc(sizeof(*infos) * total_slots);
833 enable_fds(total_slots);
834 for (pass=1; pass <=2 ; pass++) {
835 struct mddev_dev *moved_disk = NULL; /* the disk that was moved out of the insert point */
836
837 for (dnum=0, dv = devlist ; dv ;
838 dv=(dv->next)?(dv->next):moved_disk, dnum++) {
839 int fd;
840 struct stat stb;
841 struct mdinfo *inf = &infos[dnum];
842
843 if (dnum >= total_slots)
844 abort();
845 if (dnum == insert_point) {
846 moved_disk = dv;
847 continue;
848 }
849 if (strcasecmp(dv->devname, "missing")==0)
850 continue;
851 if (have_container)
852 moved_disk = NULL;
853 if (have_container && dnum < info.array.raid_disks - 1)
854 /* repeatedly use the container */
855 moved_disk = dv;
856
857 switch(pass) {
858 case 1:
859 *inf = info;
860
861 inf->disk.number = dnum;
862 inf->disk.raid_disk = dnum;
863 if (inf->disk.raid_disk < s->raiddisks)
864 inf->disk.state = (1<<MD_DISK_ACTIVE) |
865 (1<<MD_DISK_SYNC);
866 else
867 inf->disk.state = 0;
868
869 if (dv->writemostly == 1)
870 inf->disk.state |= (1<<MD_DISK_WRITEMOSTLY);
871
872 if (have_container)
873 fd = -1;
874 else {
875 if (st->ss->external &&
876 st->container_devnm[0])
877 fd = open(dv->devname, O_RDWR);
878 else
879 fd = open(dv->devname, O_RDWR|O_EXCL);
880
881 if (fd < 0) {
882 pr_err("failed to open %s after earlier success - aborting\n",
883 dv->devname);
884 goto abort_locked;
885 }
886 fstat(fd, &stb);
887 inf->disk.major = major(stb.st_rdev);
888 inf->disk.minor = minor(stb.st_rdev);
889 }
890 if (fd >= 0)
891 remove_partitions(fd);
892 if (st->ss->add_to_super(st, &inf->disk,
893 fd, dv->devname,
894 dv->data_offset)) {
895 ioctl(mdfd, STOP_ARRAY, NULL);
896 goto abort_locked;
897 }
898 st->ss->getinfo_super(st, inf, NULL);
899 safe_mode_delay = inf->safe_mode_delay;
900
901 if (have_container && c->verbose > 0)
902 pr_err("Using %s for device %d\n",
903 map_dev(inf->disk.major,
904 inf->disk.minor,
905 0), dnum);
906
907 if (!have_container) {
908 /* getinfo_super might have lost these ... */
909 inf->disk.major = major(stb.st_rdev);
910 inf->disk.minor = minor(stb.st_rdev);
911 }
912 break;
913 case 2:
914 inf->errors = 0;
915
916 rv = add_disk(mdfd, st, &info, inf);
917
918 if (rv) {
919 pr_err("ADD_NEW_DISK for %s failed: %s\n",
920 dv->devname, strerror(errno));
921 goto abort_locked;
922 }
923 break;
924 }
925 if (!have_container &&
926 dv == moved_disk && dnum != insert_point) break;
927 }
928 if (pass == 1) {
929 struct mdinfo info_new;
930 struct map_ent *me = NULL;
931
932 /* check to see if the uuid has changed due to these
933 * metadata changes, and if so update the member array
934 * and container uuid. Note ->write_init_super clears
935 * the subarray cursor such that ->getinfo_super once
936 * again returns container info.
937 */
938 st->ss->getinfo_super(st, &info_new, NULL);
939 if (st->ss->external && s->level != LEVEL_CONTAINER &&
940 !same_uuid(info_new.uuid, info.uuid, 0)) {
941 map_update(&map, fd2devnm(mdfd),
942 info_new.text_version,
943 info_new.uuid, chosen_name);
944 me = map_by_devnm(&map, st->container_devnm);
945 }
946
947 if (st->ss->write_init_super(st)) {
948 st->ss->free_super(st);
949 goto abort_locked;
950 }
951
952 /* update parent container uuid */
953 if (me) {
954 char *path = xstrdup(me->path);
955
956 st->ss->getinfo_super(st, &info_new, NULL);
957 map_update(&map, st->container_devnm,
958 info_new.text_version,
959 info_new.uuid, path);
960 free(path);
961 }
962
963 flush_metadata_updates(st);
964 st->ss->free_super(st);
965 }
966 }
967 map_unlock(&map);
968 free(infos);
969
970 if (s->level == LEVEL_CONTAINER) {
971 /* No need to start. But we should signal udev to
972 * create links */
973 sysfs_uevent(&info, "change");
974 if (c->verbose >= 0)
975 pr_err("container %s prepared.\n", mddev);
976 wait_for(chosen_name, mdfd);
977 } else if (c->runstop == 1 || subdevs >= s->raiddisks) {
978 if (st->ss->external) {
979 int err;
980 switch(s->level) {
981 case LEVEL_LINEAR:
982 case LEVEL_MULTIPATH:
983 case 0:
984 err = sysfs_set_str(&info, NULL, "array_state",
985 c->readonly
986 ? "readonly"
987 : "active");
988 need_mdmon = 0;
989 break;
990 default:
991 err = sysfs_set_str(&info, NULL, "array_state",
992 "readonly");
993 break;
994 }
995 sysfs_set_safemode(&info, safe_mode_delay);
996 if (err) {
997 pr_err("failed to activate array.\n");
998 ioctl(mdfd, STOP_ARRAY, NULL);
999 goto abort;
1000 }
1001 } else if (c->readonly &&
1002 sysfs_attribute_available(
1003 &info, NULL, "array_state")) {
1004 if (sysfs_set_str(&info, NULL,
1005 "array_state", "readonly") < 0) {
1006 pr_err("Failed to start array: %s\n",
1007 strerror(errno));
1008 ioctl(mdfd, STOP_ARRAY, NULL);
1009 goto abort;
1010 }
1011 } else {
1012 /* param is not actually used */
1013 mdu_param_t param;
1014 if (ioctl(mdfd, RUN_ARRAY, &param)) {
1015 pr_err("RUN_ARRAY failed: %s\n",
1016 strerror(errno));
1017 if (info.array.chunk_size & (info.array.chunk_size-1)) {
1018 cont_err("Problem may be that chunk size is not a power of 2\n");
1019 }
1020 ioctl(mdfd, STOP_ARRAY, NULL);
1021 goto abort;
1022 }
1023 /* if start_ro module parameter is set, array is
1024 * auto-read-only, which is bad as the resync won't
1025 * start. So lets make it read-write now.
1026 */
1027 ioctl(mdfd, RESTART_ARRAY_RW, NULL);
1028 }
1029 if (c->verbose >= 0)
1030 pr_err("array %s started.\n", mddev);
1031 if (st->ss->external && st->container_devnm[0]) {
1032 if (need_mdmon)
1033 start_mdmon(st->container_devnm);
1034
1035 ping_monitor(st->container_devnm);
1036 close(container_fd);
1037 }
1038 wait_for(chosen_name, mdfd);
1039 } else {
1040 pr_err("not starting array - not enough devices.\n");
1041 }
1042 close(mdfd);
1043 return 0;
1044
1045 abort:
1046 map_lock(&map);
1047 abort_locked:
1048 map_remove(&map, fd2devnm(mdfd));
1049 map_unlock(&map);
1050
1051 if (mdfd >= 0)
1052 close(mdfd);
1053 return 1;
1054 }
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