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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 st->nodes = c->nodes;
535 st->cluster_name = c->homecluster;
536
537 if (warn) {
538 if (c->runstop!= 1) {
539 if (!ask("Continue creating array? ")) {
540 pr_err("create aborted.\n");
541 return 1;
542 }
543 } else {
544 if (c->verbose > 0)
545 pr_err("creation continuing despite oddities due to --run\n");
546 }
547 }
548
549 /* If this is raid4/5, we want to configure the last active slot
550 * as missing, so that a reconstruct happens (faster than re-parity)
551 * FIX: Can we do this for raid6 as well?
552 */
553 if (st->ss->external == 0 &&
554 s->assume_clean==0 && c->force == 0 && first_missing >= s->raiddisks) {
555 switch ( s->level ) {
556 case 4:
557 case 5:
558 insert_point = s->raiddisks-1;
559 s->sparedisks++;
560 info.array.active_disks--;
561 missing_disks++;
562 break;
563 default:
564 break;
565 }
566 }
567 /* For raid6, if creating with 1 missing drive, make a good drive
568 * into a spare, else the create will fail
569 */
570 if (s->assume_clean == 0 && c->force == 0 && first_missing < s->raiddisks &&
571 st->ss->external == 0 &&
572 second_missing >= s->raiddisks && s->level == 6) {
573 insert_point = s->raiddisks - 1;
574 if (insert_point == first_missing)
575 insert_point--;
576 s->sparedisks ++;
577 info.array.active_disks--;
578 missing_disks++;
579 }
580
581 if (s->level <= 0 && first_missing < subdevs * 2) {
582 pr_err("This level does not support missing devices\n");
583 return 1;
584 }
585
586 /* We need to create the device */
587 map_lock(&map);
588 mdfd = create_mddev(mddev, name, c->autof, LOCAL, chosen_name);
589 if (mdfd < 0) {
590 map_unlock(&map);
591 return 1;
592 }
593 /* verify if chosen_name is not in use,
594 * it could be in conflict with already existing device
595 * e.g. container, array
596 */
597 if (strncmp(chosen_name, "/dev/md/", 8) == 0
598 && map_by_name(&map, chosen_name+8) != NULL) {
599 pr_err("Array name %s is in use already.\n",
600 chosen_name);
601 close(mdfd);
602 map_unlock(&map);
603 return 1;
604 }
605 mddev = chosen_name;
606
607 vers = md_get_version(mdfd);
608 if (vers < 9000) {
609 pr_err("Create requires md driver version 0.90.0 or later\n");
610 goto abort_locked;
611 } else {
612 mdu_array_info_t inf;
613 memset(&inf, 0, sizeof(inf));
614 ioctl(mdfd, GET_ARRAY_INFO, &inf);
615 if (inf.working_disks != 0) {
616 pr_err("another array by this name is already running.\n");
617 goto abort_locked;
618 }
619 }
620
621 /* Ok, lets try some ioctls */
622
623 info.array.level = s->level;
624 info.array.size = s->size;
625 info.array.raid_disks = s->raiddisks;
626 /* The kernel should *know* what md_minor we are dealing
627 * with, but it chooses to trust me instead. Sigh
628 */
629 info.array.md_minor = 0;
630 if (fstat(mdfd, &stb)==0)
631 info.array.md_minor = minor(stb.st_rdev);
632 info.array.not_persistent = 0;
633
634 if ( ( (s->level == 4 || s->level == 5) &&
635 (insert_point < s->raiddisks || first_missing < s->raiddisks) )
636 ||
637 ( s->level == 6 && (insert_point < s->raiddisks
638 || second_missing < s->raiddisks))
639 ||
640 ( s->level <= 0 )
641 ||
642 s->assume_clean
643 ) {
644 info.array.state = 1; /* clean, but one+ drive will be missing*/
645 info.resync_start = MaxSector;
646 } else {
647 info.array.state = 0; /* not clean, but no errors */
648 info.resync_start = 0;
649 }
650 if (s->level == 10) {
651 /* for raid10, the bitmap size is the capacity of the array,
652 * which is array.size * raid_disks / ncopies;
653 * .. but convert to sectors.
654 */
655 int ncopies = ((s->layout>>8) & 255) * (s->layout & 255);
656 bitmapsize = s->size * s->raiddisks / ncopies * 2;
657 /* printf("bms=%llu as=%d rd=%d nc=%d\n", bitmapsize, s->size, s->raiddisks, ncopies);*/
658 } else
659 bitmapsize = s->size * 2;
660
661 /* There is lots of redundancy in these disk counts,
662 * raid_disks is the most meaningful value
663 * it describes the geometry of the array
664 * it is constant
665 * nr_disks is total number of used slots.
666 * it should be raid_disks+spare_disks
667 * spare_disks is the number of extra disks present
668 * see above
669 * active_disks is the number of working disks in
670 * active slots. (With raid_disks)
671 * working_disks is the total number of working disks,
672 * including spares
673 * failed_disks is the number of disks marked failed
674 *
675 * Ideally, the kernel would keep these (except raid_disks)
676 * up-to-date as we ADD_NEW_DISK, but it doesn't (yet).
677 * So for now, we assume that all raid and spare
678 * devices will be given.
679 */
680 info.array.spare_disks=s->sparedisks;
681 info.array.failed_disks=missing_disks;
682 info.array.nr_disks = info.array.working_disks
683 + info.array.failed_disks;
684 info.array.layout = s->layout;
685 info.array.chunk_size = s->chunk*1024;
686
687 if (name == NULL || *name == 0) {
688 /* base name on mddev */
689 /* /dev/md0 -> 0
690 * /dev/md_d0 -> d0
691 * /dev/md_foo -> foo
692 * /dev/md/1 -> 1
693 * /dev/md/d1 -> d1
694 * /dev/md/home -> home
695 * /dev/mdhome -> home
696 */
697 /* FIXME compare this with rules in create_mddev */
698 name = strrchr(mddev, '/');
699 if (name) {
700 name++;
701 if (strncmp(name, "md_", 3)==0 &&
702 strlen(name) > 3 &&
703 (name-mddev) == 5 /* /dev/ */)
704 name += 3;
705 else if (strncmp(name, "md", 2)==0 &&
706 strlen(name) > 2 &&
707 isdigit(name[2]) &&
708 (name-mddev) == 5 /* /dev/ */)
709 name += 2;
710 }
711 }
712 if (!st->ss->init_super(st, &info.array, s->size, name, c->homehost, uuid,
713 data_offset))
714 goto abort_locked;
715
716 total_slots = info.array.nr_disks;
717 st->ss->getinfo_super(st, &info, NULL);
718 sysfs_init(&info, mdfd, NULL);
719
720 if (did_default && c->verbose >= 0) {
721 if (is_subarray(info.text_version)) {
722 char devnm[32];
723 char *ep;
724 struct mdinfo *mdi;
725
726 strncpy(devnm, info.text_version+1, 32);
727 devnm[31] = 0;
728 ep = strchr(devnm, '/');
729 if (ep)
730 *ep = 0;
731
732 mdi = sysfs_read(-1, devnm, GET_VERSION);
733
734 pr_err("Creating array inside %s container %s\n",
735 mdi?mdi->text_version:"managed", devnm);
736 sysfs_free(mdi);
737 } else
738 pr_err("Defaulting to version %s metadata\n", info.text_version);
739 }
740
741 map_update(&map, fd2devnm(mdfd), info.text_version,
742 info.uuid, chosen_name);
743 /* Keep map locked until devices have been added to array
744 * to stop another mdadm from finding and using those devices.
745 */
746
747 if (s->bitmap_file && vers < 9003) {
748 major_num = BITMAP_MAJOR_HOSTENDIAN;
749 #ifdef __BIG_ENDIAN
750 pr_err("Warning - bitmaps created on this kernel are not portable\n"
751 " between different architectured. Consider upgrading the Linux kernel.\n");
752 #endif
753 }
754
755 if (s->bitmap_file && (strcmp(s->bitmap_file, "internal")==0 ||
756 strcmp(s->bitmap_file, "clustered")==0)) {
757 if ((vers%100) < 2) {
758 pr_err("internal bitmaps not supported by this kernel.\n");
759 goto abort_locked;
760 }
761 if (!st->ss->add_internal_bitmap) {
762 pr_err("internal bitmaps not supported with %s metadata\n",
763 st->ss->name);
764 goto abort_locked;
765 }
766 if (!st->ss->add_internal_bitmap(st, &s->bitmap_chunk,
767 c->delay, s->write_behind,
768 bitmapsize, 1, major_num)) {
769 pr_err("Given bitmap chunk size not supported.\n");
770 goto abort_locked;
771 }
772 s->bitmap_file = NULL;
773 }
774
775 sysfs_init(&info, mdfd, NULL);
776
777 if (st->ss->external && st->container_devnm[0]) {
778 /* member */
779
780 /* When creating a member, we need to be careful
781 * to negotiate with mdmon properly.
782 * If it is already running, we cannot write to
783 * the devices and must ask it to do that part.
784 * If it isn't running, we write to the devices,
785 * and then start it.
786 * We hold an exclusive open on the container
787 * device to make sure mdmon doesn't exit after
788 * we checked that it is running.
789 *
790 * For now, fail if it is already running.
791 */
792 container_fd = open_dev_excl(st->container_devnm);
793 if (container_fd < 0) {
794 pr_err("Cannot get exclusive open on container - weird.\n");
795 goto abort_locked;
796 }
797 if (mdmon_running(st->container_devnm)) {
798 if (c->verbose)
799 pr_err("reusing mdmon for %s.\n",
800 st->container_devnm);
801 st->update_tail = &st->updates;
802 } else
803 need_mdmon = 1;
804 }
805 rv = set_array_info(mdfd, st, &info);
806 if (rv) {
807 pr_err("failed to set array info for %s: %s\n",
808 mddev, strerror(errno));
809 goto abort_locked;
810 }
811
812 if (s->bitmap_file) {
813 int uuid[4];
814
815 st->ss->uuid_from_super(st, uuid);
816 if (CreateBitmap(s->bitmap_file, c->force, (char*)uuid, s->bitmap_chunk,
817 c->delay, s->write_behind,
818 bitmapsize,
819 major_num)) {
820 goto abort_locked;
821 }
822 bitmap_fd = open(s->bitmap_file, O_RDWR);
823 if (bitmap_fd < 0) {
824 pr_err("weird: %s cannot be openned\n",
825 s->bitmap_file);
826 goto abort_locked;
827 }
828 if (ioctl(mdfd, SET_BITMAP_FILE, bitmap_fd) < 0) {
829 pr_err("Cannot set bitmap file for %s: %s\n",
830 mddev, strerror(errno));
831 goto abort_locked;
832 }
833 }
834
835 infos = xmalloc(sizeof(*infos) * total_slots);
836 enable_fds(total_slots);
837 for (pass=1; pass <=2 ; pass++) {
838 struct mddev_dev *moved_disk = NULL; /* the disk that was moved out of the insert point */
839
840 for (dnum=0, dv = devlist ; dv ;
841 dv=(dv->next)?(dv->next):moved_disk, dnum++) {
842 int fd;
843 struct stat stb;
844 struct mdinfo *inf = &infos[dnum];
845
846 if (dnum >= total_slots)
847 abort();
848 if (dnum == insert_point) {
849 moved_disk = dv;
850 continue;
851 }
852 if (strcasecmp(dv->devname, "missing")==0)
853 continue;
854 if (have_container)
855 moved_disk = NULL;
856 if (have_container && dnum < info.array.raid_disks - 1)
857 /* repeatedly use the container */
858 moved_disk = dv;
859
860 switch(pass) {
861 case 1:
862 *inf = info;
863
864 inf->disk.number = dnum;
865 inf->disk.raid_disk = dnum;
866 if (inf->disk.raid_disk < s->raiddisks)
867 inf->disk.state = (1<<MD_DISK_ACTIVE) |
868 (1<<MD_DISK_SYNC);
869 else
870 inf->disk.state = 0;
871
872 if (dv->writemostly == 1)
873 inf->disk.state |= (1<<MD_DISK_WRITEMOSTLY);
874
875 if (have_container)
876 fd = -1;
877 else {
878 if (st->ss->external &&
879 st->container_devnm[0])
880 fd = open(dv->devname, O_RDWR);
881 else
882 fd = open(dv->devname, O_RDWR|O_EXCL);
883
884 if (fd < 0) {
885 pr_err("failed to open %s after earlier success - aborting\n",
886 dv->devname);
887 goto abort_locked;
888 }
889 fstat(fd, &stb);
890 inf->disk.major = major(stb.st_rdev);
891 inf->disk.minor = minor(stb.st_rdev);
892 }
893 if (fd >= 0)
894 remove_partitions(fd);
895 if (st->ss->add_to_super(st, &inf->disk,
896 fd, dv->devname,
897 dv->data_offset)) {
898 ioctl(mdfd, STOP_ARRAY, NULL);
899 goto abort_locked;
900 }
901 st->ss->getinfo_super(st, inf, NULL);
902 safe_mode_delay = inf->safe_mode_delay;
903
904 if (have_container && c->verbose > 0)
905 pr_err("Using %s for device %d\n",
906 map_dev(inf->disk.major,
907 inf->disk.minor,
908 0), dnum);
909
910 if (!have_container) {
911 /* getinfo_super might have lost these ... */
912 inf->disk.major = major(stb.st_rdev);
913 inf->disk.minor = minor(stb.st_rdev);
914 }
915 break;
916 case 2:
917 inf->errors = 0;
918
919 rv = add_disk(mdfd, st, &info, inf);
920
921 if (rv) {
922 pr_err("ADD_NEW_DISK for %s failed: %s\n",
923 dv->devname, strerror(errno));
924 goto abort_locked;
925 }
926 break;
927 }
928 if (!have_container &&
929 dv == moved_disk && dnum != insert_point) break;
930 }
931 if (pass == 1) {
932 struct mdinfo info_new;
933 struct map_ent *me = NULL;
934
935 /* check to see if the uuid has changed due to these
936 * metadata changes, and if so update the member array
937 * and container uuid. Note ->write_init_super clears
938 * the subarray cursor such that ->getinfo_super once
939 * again returns container info.
940 */
941 st->ss->getinfo_super(st, &info_new, NULL);
942 if (st->ss->external && s->level != LEVEL_CONTAINER &&
943 !same_uuid(info_new.uuid, info.uuid, 0)) {
944 map_update(&map, fd2devnm(mdfd),
945 info_new.text_version,
946 info_new.uuid, chosen_name);
947 me = map_by_devnm(&map, st->container_devnm);
948 }
949
950 if (st->ss->write_init_super(st)) {
951 st->ss->free_super(st);
952 goto abort_locked;
953 }
954
955 /* update parent container uuid */
956 if (me) {
957 char *path = xstrdup(me->path);
958
959 st->ss->getinfo_super(st, &info_new, NULL);
960 map_update(&map, st->container_devnm,
961 info_new.text_version,
962 info_new.uuid, path);
963 free(path);
964 }
965
966 flush_metadata_updates(st);
967 st->ss->free_super(st);
968 }
969 }
970 map_unlock(&map);
971 free(infos);
972
973 if (s->level == LEVEL_CONTAINER) {
974 /* No need to start. But we should signal udev to
975 * create links */
976 sysfs_uevent(&info, "change");
977 if (c->verbose >= 0)
978 pr_err("container %s prepared.\n", mddev);
979 wait_for(chosen_name, mdfd);
980 } else if (c->runstop == 1 || subdevs >= s->raiddisks) {
981 if (st->ss->external) {
982 int err;
983 switch(s->level) {
984 case LEVEL_LINEAR:
985 case LEVEL_MULTIPATH:
986 case 0:
987 err = sysfs_set_str(&info, NULL, "array_state",
988 c->readonly
989 ? "readonly"
990 : "active");
991 need_mdmon = 0;
992 break;
993 default:
994 err = sysfs_set_str(&info, NULL, "array_state",
995 "readonly");
996 break;
997 }
998 sysfs_set_safemode(&info, safe_mode_delay);
999 if (err) {
1000 pr_err("failed to activate array.\n");
1001 ioctl(mdfd, STOP_ARRAY, NULL);
1002 goto abort;
1003 }
1004 } else if (c->readonly &&
1005 sysfs_attribute_available(
1006 &info, NULL, "array_state")) {
1007 if (sysfs_set_str(&info, NULL,
1008 "array_state", "readonly") < 0) {
1009 pr_err("Failed to start array: %s\n",
1010 strerror(errno));
1011 ioctl(mdfd, STOP_ARRAY, NULL);
1012 goto abort;
1013 }
1014 } else {
1015 /* param is not actually used */
1016 mdu_param_t param;
1017 if (ioctl(mdfd, RUN_ARRAY, &param)) {
1018 pr_err("RUN_ARRAY failed: %s\n",
1019 strerror(errno));
1020 if (info.array.chunk_size & (info.array.chunk_size-1)) {
1021 cont_err("Problem may be that chunk size is not a power of 2\n");
1022 }
1023 ioctl(mdfd, STOP_ARRAY, NULL);
1024 goto abort;
1025 }
1026 /* if start_ro module parameter is set, array is
1027 * auto-read-only, which is bad as the resync won't
1028 * start. So lets make it read-write now.
1029 */
1030 ioctl(mdfd, RESTART_ARRAY_RW, NULL);
1031 }
1032 if (c->verbose >= 0)
1033 pr_err("array %s started.\n", mddev);
1034 if (st->ss->external && st->container_devnm[0]) {
1035 if (need_mdmon)
1036 start_mdmon(st->container_devnm);
1037
1038 ping_monitor(st->container_devnm);
1039 close(container_fd);
1040 }
1041 wait_for(chosen_name, mdfd);
1042 } else {
1043 pr_err("not starting array - not enough devices.\n");
1044 }
1045 close(mdfd);
1046 return 0;
1047
1048 abort:
1049 map_lock(&map);
1050 abort_locked:
1051 map_remove(&map, fd2devnm(mdfd));
1052 map_unlock(&map);
1053
1054 if (mdfd >= 0)
1055 close(mdfd);
1056 return 1;
1057 }
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