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mdmon: fix wrong array state when disk fails during mdmon startup
[thirdparty/mdadm.git] / Create.c
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 round_size_and_verify(unsigned long long *size, int chunk)
31 {
32 if (*size == 0)
33 return 0;
34 *size &= ~(unsigned long long)(chunk - 1);
35 if (*size == 0) {
36 pr_err("Size cannot be smaller than chunk.\n");
37 return 1;
38 }
39 return 0;
40 }
41
42 static int default_layout(struct supertype *st, int level, int verbose)
43 {
44 int layout = UnSet;
45
46 if (st && st->ss->default_geometry)
47 st->ss->default_geometry(st, &level, &layout, NULL);
48
49 if (layout == UnSet)
50 switch(level) {
51 default: /* no layout */
52 layout = 0;
53 break;
54 case 10:
55 layout = 0x102; /* near=2, far=1 */
56 if (verbose > 0)
57 pr_err("layout defaults to n2\n");
58 break;
59 case 5:
60 case 6:
61 layout = map_name(r5layout, "default");
62 if (verbose > 0)
63 pr_err("layout defaults to %s\n", map_num(r5layout, layout));
64 break;
65 case LEVEL_FAULTY:
66 layout = map_name(faultylayout, "default");
67
68 if (verbose > 0)
69 pr_err("layout defaults to %s\n", map_num(faultylayout, layout));
70 break;
71 }
72
73 return layout;
74 }
75
76 int Create(struct supertype *st, char *mddev,
77 char *name, int *uuid,
78 int subdevs, struct mddev_dev *devlist,
79 struct shape *s,
80 struct context *c, unsigned long long data_offset)
81 {
82 /*
83 * Create a new raid array.
84 *
85 * First check that necessary details are available
86 * (i.e. level, raid-disks)
87 *
88 * Then check each disk to see what might be on it
89 * and report anything interesting.
90 *
91 * If anything looks odd, and runstop not set,
92 * abort.
93 *
94 * SET_ARRAY_INFO and ADD_NEW_DISK, and
95 * if runstop==run, or raiddisks disks were used,
96 * RUN_ARRAY
97 */
98 int mdfd;
99 unsigned long long minsize = 0, maxsize = 0;
100 char *mindisc = NULL;
101 char *maxdisc = NULL;
102 int dnum, raid_disk_num;
103 struct mddev_dev *dv;
104 dev_t rdev;
105 int fail = 0, warn = 0;
106 int first_missing = subdevs * 2;
107 int second_missing = subdevs * 2;
108 int missing_disks = 0;
109 int insert_point = subdevs * 2; /* where to insert a missing drive */
110 int total_slots;
111 int pass;
112 int rv;
113 int bitmap_fd;
114 int have_container = 0;
115 int container_fd = -1;
116 int need_mdmon = 0;
117 unsigned long long bitmapsize;
118 struct mdinfo info, *infos;
119 int did_default = 0;
120 int do_default_layout = 0;
121 int do_default_chunk = 0;
122 unsigned long safe_mode_delay = 0;
123 char chosen_name[1024];
124 struct map_ent *map = NULL;
125 unsigned long long newsize;
126 mdu_array_info_t inf;
127
128 int major_num = BITMAP_MAJOR_HI;
129 if (s->bitmap_file && strcmp(s->bitmap_file, "clustered") == 0) {
130 major_num = BITMAP_MAJOR_CLUSTERED;
131 if (c->nodes <= 1) {
132 pr_err("At least 2 nodes are needed for cluster-md\n");
133 return 1;
134 }
135 }
136
137 memset(&info, 0, sizeof(info));
138 if (s->level == UnSet && st && st->ss->default_geometry)
139 st->ss->default_geometry(st, &s->level, NULL, NULL);
140 if (s->level == UnSet) {
141 pr_err("a RAID level is needed to create an array.\n");
142 return 1;
143 }
144 if (s->raiddisks < 4 && s->level == 6) {
145 pr_err("at least 4 raid-devices needed for level 6\n");
146 return 1;
147 }
148 if (s->raiddisks > 256 && s->level == 6) {
149 pr_err("no more than 256 raid-devices supported for level 6\n");
150 return 1;
151 }
152 if (s->raiddisks < 2 && s->level >= 4) {
153 pr_err("at least 2 raid-devices needed for level 4 or 5\n");
154 return 1;
155 }
156 if (s->level <= 0 && s->sparedisks) {
157 pr_err("This level does not support spare devices\n");
158 return 1;
159 }
160
161 if (subdevs == 1 && strcmp(devlist->devname, "missing") != 0) {
162 /* If given a single device, it might be a container, and we can
163 * extract a device list from there
164 */
165 int fd;
166
167 memset(&inf, 0, sizeof(inf));
168 fd = open(devlist->devname, O_RDONLY);
169 if (fd >= 0 &&
170 md_get_array_info(fd, &inf) == 0 && inf.raid_disks == 0) {
171 /* yep, looks like a container */
172 if (st) {
173 rv = st->ss->load_container(st, fd,
174 devlist->devname);
175 if (rv == 0)
176 have_container = 1;
177 } else {
178 st = super_by_fd(fd, NULL);
179 if (st && !(rv = st->ss->
180 load_container(st, fd,
181 devlist->devname)))
182 have_container = 1;
183 else
184 st = NULL;
185 }
186 if (have_container) {
187 subdevs = s->raiddisks;
188 first_missing = subdevs * 2;
189 second_missing = subdevs * 2;
190 insert_point = subdevs * 2;
191 }
192 }
193 if (fd >= 0)
194 close(fd);
195 }
196 if (st && st->ss->external && s->sparedisks) {
197 pr_err("This metadata type does not support spare disks at create time\n");
198 return 1;
199 }
200 if (subdevs > s->raiddisks+s->sparedisks+s->journaldisks) {
201 pr_err("You have listed more devices (%d) than are in the array(%d)!\n", subdevs, s->raiddisks+s->sparedisks);
202 return 1;
203 }
204 if (!have_container && subdevs < s->raiddisks+s->sparedisks+s->journaldisks) {
205 pr_err("You haven't given enough devices (real or missing) to create this array\n");
206 return 1;
207 }
208 if (s->bitmap_file && s->level <= 0) {
209 pr_err("bitmaps not meaningful with level %s\n",
210 map_num(pers, s->level)?:"given");
211 return 1;
212 }
213
214 /* now set some defaults */
215
216 if (s->layout == UnSet) {
217 do_default_layout = 1;
218 s->layout = default_layout(st, s->level, c->verbose);
219 }
220
221 if (s->level == 10)
222 /* check layout fits in array*/
223 if ((s->layout&255) * ((s->layout>>8)&255) > s->raiddisks) {
224 pr_err("that layout requires at least %d devices\n",
225 (s->layout&255) * ((s->layout>>8)&255));
226 return 1;
227 }
228
229 switch(s->level) {
230 case 4:
231 case 5:
232 case 10:
233 case 6:
234 case 0:
235 if (s->chunk == 0 || s->chunk == UnSet) {
236 s->chunk = UnSet;
237 do_default_chunk = 1;
238 /* chunk will be set later */
239 }
240 break;
241 case LEVEL_LINEAR:
242 /* a chunksize of zero 0s perfectly valid (and preferred) since 2.6.16 */
243 if (get_linux_version() < 2006016 && s->chunk == 0) {
244 s->chunk = 64;
245 if (c->verbose > 0)
246 pr_err("chunk size defaults to 64K\n");
247 }
248 break;
249 case 1:
250 case LEVEL_FAULTY:
251 case LEVEL_MULTIPATH:
252 case LEVEL_CONTAINER:
253 if (s->chunk) {
254 s->chunk = 0;
255 if (c->verbose > 0)
256 pr_err("chunk size ignored for this level\n");
257 }
258 break;
259 default:
260 pr_err("unknown level %d\n", s->level);
261 return 1;
262 }
263
264 if (s->size == MAX_SIZE)
265 /* use '0' to mean 'max' now... */
266 s->size = 0;
267 if (s->size && s->chunk && s->chunk != UnSet)
268 if (round_size_and_verify(&s->size, s->chunk))
269 return 1;
270
271 newsize = s->size * 2;
272 if (st && ! st->ss->validate_geometry(st, s->level, s->layout, s->raiddisks,
273 &s->chunk, s->size*2,
274 data_offset, NULL,
275 &newsize, s->consistency_policy,
276 c->verbose >= 0))
277 return 1;
278
279 if (s->chunk && s->chunk != UnSet) {
280 newsize &= ~(unsigned long long)(s->chunk*2 - 1);
281 if (do_default_chunk) {
282 /* default chunk was just set */
283 if (c->verbose > 0)
284 pr_err("chunk size defaults to %dK\n", s->chunk);
285 if (round_size_and_verify(&s->size, s->chunk))
286 return 1;
287 do_default_chunk = 0;
288 }
289 }
290
291 if (s->size == 0) {
292 s->size = newsize / 2;
293 if (s->level == 1)
294 /* If this is ever reshaped to RAID5, we will
295 * need a chunksize. So round it off a bit
296 * now just to be safe
297 */
298 s->size &= ~(64ULL-1);
299
300 if (s->size && c->verbose > 0)
301 pr_err("setting size to %lluK\n", s->size);
302 }
303
304 /* now look at the subdevs */
305 info.array.active_disks = 0;
306 info.array.working_disks = 0;
307 dnum = 0;
308 for (dv = devlist; dv; dv = dv->next)
309 if (data_offset == VARIABLE_OFFSET)
310 dv->data_offset = INVALID_SECTORS;
311 else
312 dv->data_offset = data_offset;
313
314 for (dv=devlist; dv && !have_container; dv=dv->next, dnum++) {
315 char *dname = dv->devname;
316 unsigned long long freesize;
317 int dfd;
318 char *doff;
319
320 if (strcasecmp(dname, "missing") == 0) {
321 if (first_missing > dnum)
322 first_missing = dnum;
323 if (second_missing > dnum && dnum > first_missing)
324 second_missing = dnum;
325 missing_disks ++;
326 continue;
327 }
328 if (data_offset == VARIABLE_OFFSET) {
329 doff = strchr(dname, ':');
330 if (doff) {
331 *doff++ = 0;
332 dv->data_offset = parse_size(doff);
333 } else
334 dv->data_offset = INVALID_SECTORS;
335 } else
336 dv->data_offset = data_offset;
337
338 dfd = open(dname, O_RDONLY);
339 if (dfd < 0) {
340 pr_err("cannot open %s: %s\n",
341 dname, strerror(errno));
342 exit(2);
343 }
344 if (!fstat_is_blkdev(dfd, dname, NULL)) {
345 close(dfd);
346 exit(2);
347 }
348 close(dfd);
349 info.array.working_disks++;
350 if (dnum < s->raiddisks && dv->disposition != 'j')
351 info.array.active_disks++;
352 if (st == NULL) {
353 struct createinfo *ci = conf_get_create_info();
354 if (ci)
355 st = ci->supertype;
356 }
357 if (st == NULL) {
358 /* Need to choose a default metadata, which is different
359 * depending on geometry of array.
360 */
361 int i;
362 char *name = "default";
363 for(i = 0; !st && superlist[i]; i++) {
364 st = superlist[i]->match_metadata_desc(name);
365 if (!st)
366 continue;
367 if (do_default_layout)
368 s->layout = default_layout(st, s->level, c->verbose);
369 switch (st->ss->validate_geometry(
370 st, s->level, s->layout, s->raiddisks,
371 &s->chunk, s->size*2,
372 dv->data_offset, dname,
373 &freesize, s->consistency_policy,
374 c->verbose > 0)) {
375 case -1: /* Not valid, message printed, and not
376 * worth checking any further */
377 exit(2);
378 break;
379 case 0: /* Geometry not valid */
380 free(st);
381 st = NULL;
382 s->chunk = do_default_chunk ? UnSet : s->chunk;
383 break;
384 case 1: /* All happy */
385 break;
386 }
387 }
388
389 if (!st) {
390 int dfd = open(dname, O_RDONLY|O_EXCL);
391 if (dfd < 0) {
392 pr_err("cannot open %s: %s\n",
393 dname, strerror(errno));
394 exit(2);
395 }
396 pr_err("device %s not suitable for any style of array\n",
397 dname);
398 exit(2);
399 }
400 if (st->ss != &super0 ||
401 st->minor_version != 90)
402 did_default = 1;
403 } else {
404 if (do_default_layout)
405 s->layout = default_layout(st, s->level, 0);
406 if (!st->ss->validate_geometry(st, s->level, s->layout,
407 s->raiddisks,
408 &s->chunk, s->size*2,
409 dv->data_offset,
410 dname, &freesize,
411 s->consistency_policy,
412 c->verbose >= 0)) {
413
414 pr_err("%s is not suitable for this array.\n",
415 dname);
416 fail = 1;
417 continue;
418 }
419 }
420
421 if (dv->disposition == 'j')
422 goto skip_size_check; /* skip write journal for size check */
423
424 freesize /= 2; /* convert to K */
425 if (s->chunk && s->chunk != UnSet) {
426 /* round to chunk size */
427 freesize = freesize & ~(s->chunk-1);
428 if (do_default_chunk) {
429 /* default chunk was just set */
430 if (c->verbose > 0)
431 pr_err("chunk size defaults to %dK\n", s->chunk);
432 if (round_size_and_verify(&s->size, s->chunk))
433 return 1;
434 do_default_chunk = 0;
435 }
436 }
437 if (!freesize) {
438 pr_err("no free space left on %s\n", dname);
439 fail = 1;
440 continue;
441 }
442
443 if (s->size && freesize < s->size) {
444 pr_err("%s is smaller than given size. %lluK < %lluK + metadata\n",
445 dname, freesize, s->size);
446 fail = 1;
447 continue;
448 }
449 if (maxdisc == NULL || (maxdisc && freesize > maxsize)) {
450 maxdisc = dname;
451 maxsize = freesize;
452 }
453 if (mindisc ==NULL || (mindisc && freesize < minsize)) {
454 mindisc = dname;
455 minsize = freesize;
456 }
457 skip_size_check:
458 if (c->runstop != 1 || c->verbose >= 0) {
459 int fd = open(dname, O_RDONLY);
460 if (fd < 0) {
461 pr_err("Cannot open %s: %s\n",
462 dname, strerror(errno));
463 fail = 1;
464 continue;
465 }
466 warn |= check_ext2(fd, dname);
467 warn |= check_reiser(fd, dname);
468 warn |= check_raid(fd, dname);
469 if (strcmp(st->ss->name, "1.x") == 0 &&
470 st->minor_version >= 1)
471 /* metadata at front */
472 warn |= check_partitions(fd, dname, 0, 0);
473 else if (s->level == 1 || s->level == LEVEL_CONTAINER ||
474 (s->level == 0 && s->raiddisks == 1))
475 /* partitions could be meaningful */
476 warn |= check_partitions(fd, dname, freesize*2, s->size*2);
477 else
478 /* partitions cannot be meaningful */
479 warn |= check_partitions(fd, dname, 0, 0);
480 if (strcmp(st->ss->name, "1.x") == 0 &&
481 st->minor_version >= 1 &&
482 did_default &&
483 s->level == 1 &&
484 (warn & 1024) == 0) {
485 warn |= 1024;
486 pr_err("Note: this array has metadata at the start and\n"
487 " may not be suitable as a boot device. If you plan to\n"
488 " store '/boot' on this device please ensure that\n"
489 " your boot-loader understands md/v1.x metadata, or use\n"
490 " --metadata=0.90\n");
491 }
492 close(fd);
493 }
494 }
495 if (missing_disks == dnum && !have_container) {
496 pr_err("Subdevs can't be all missing\n");
497 return 1;
498 }
499 if (s->raiddisks + s->sparedisks > st->max_devs) {
500 pr_err("Too many devices: %s metadata only supports %d\n",
501 st->ss->name, st->max_devs);
502 return 1;
503 }
504 if (have_container)
505 info.array.working_disks = s->raiddisks;
506 if (fail) {
507 pr_err("create aborted\n");
508 return 1;
509 }
510 if (s->size == 0) {
511 if (mindisc == NULL && !have_container) {
512 pr_err("no size and no drives given - aborting create.\n");
513 return 1;
514 }
515 if (s->level > 0 || s->level == LEVEL_MULTIPATH ||
516 s->level == LEVEL_FAULTY || st->ss->external) {
517 /* size is meaningful */
518 if (!st->ss->validate_geometry(st, s->level, s->layout,
519 s->raiddisks,
520 &s->chunk, minsize*2,
521 data_offset,
522 NULL, NULL,
523 s->consistency_policy, 0)) {
524 pr_err("devices too large for RAID level %d\n", s->level);
525 return 1;
526 }
527 s->size = minsize;
528 if (s->level == 1)
529 /* If this is ever reshaped to RAID5, we will
530 * need a chunksize. So round it off a bit
531 * now just to be safe
532 */
533 s->size &= ~(64ULL-1);
534 if (c->verbose > 0)
535 pr_err("size set to %lluK\n", s->size);
536 }
537 }
538
539 if (!s->bitmap_file &&
540 s->level >= 1 &&
541 st->ss->add_internal_bitmap &&
542 (s->consistency_policy != CONSISTENCY_POLICY_RESYNC &&
543 s->consistency_policy != CONSISTENCY_POLICY_PPL) &&
544 (s->write_behind || s->size > 100*1024*1024ULL)) {
545 if (c->verbose > 0)
546 pr_err("automatically enabling write-intent bitmap on large array\n");
547 s->bitmap_file = "internal";
548 }
549 if (s->bitmap_file && strcmp(s->bitmap_file, "none") == 0)
550 s->bitmap_file = NULL;
551
552 if (s->consistency_policy == CONSISTENCY_POLICY_PPL &&
553 !st->ss->write_init_ppl) {
554 pr_err("%s metadata does not support PPL\n", st->ss->name);
555 return 1;
556 }
557
558 if (!have_container && s->level > 0 && ((maxsize-s->size)*100 > maxsize)) {
559 if (c->runstop != 1 || c->verbose >= 0)
560 pr_err("largest drive (%s) exceeds size (%lluK) by more than 1%%\n",
561 maxdisc, s->size);
562 warn = 1;
563 }
564
565 if (st->ss->detail_platform && st->ss->detail_platform(0, 1, NULL) != 0) {
566 if (c->runstop != 1 || c->verbose >= 0)
567 pr_err("%s unable to enumerate platform support\n"
568 " array may not be compatible with hardware/firmware\n",
569 st->ss->name);
570 warn = 1;
571 }
572 st->nodes = c->nodes;
573 st->cluster_name = c->homecluster;
574
575 if (warn) {
576 if (c->runstop!= 1) {
577 if (!ask("Continue creating array? ")) {
578 pr_err("create aborted.\n");
579 return 1;
580 }
581 } else {
582 if (c->verbose > 0)
583 pr_err("creation continuing despite oddities due to --run\n");
584 }
585 }
586
587 /* If this is raid4/5, we want to configure the last active slot
588 * as missing, so that a reconstruct happens (faster than re-parity)
589 * FIX: Can we do this for raid6 as well?
590 */
591 if (st->ss->external == 0 && s->assume_clean == 0 &&
592 c->force == 0 && first_missing >= s->raiddisks) {
593 switch (s->level) {
594 case 4:
595 case 5:
596 insert_point = s->raiddisks-1;
597 s->sparedisks++;
598 info.array.active_disks--;
599 missing_disks++;
600 break;
601 default:
602 break;
603 }
604 }
605 /* For raid6, if creating with 1 missing drive, make a good drive
606 * into a spare, else the create will fail
607 */
608 if (s->assume_clean == 0 && c->force == 0 && first_missing < s->raiddisks &&
609 st->ss->external == 0 &&
610 second_missing >= s->raiddisks && s->level == 6) {
611 insert_point = s->raiddisks - 1;
612 if (insert_point == first_missing)
613 insert_point--;
614 s->sparedisks ++;
615 info.array.active_disks--;
616 missing_disks++;
617 }
618
619 if (s->level <= 0 && first_missing < subdevs * 2) {
620 pr_err("This level does not support missing devices\n");
621 return 1;
622 }
623
624 /* We need to create the device */
625 map_lock(&map);
626 mdfd = create_mddev(mddev, name, c->autof, LOCAL, chosen_name, 1);
627 if (mdfd < 0) {
628 map_unlock(&map);
629 return 1;
630 }
631 /* verify if chosen_name is not in use,
632 * it could be in conflict with already existing device
633 * e.g. container, array
634 */
635 if (strncmp(chosen_name, "/dev/md/", 8) == 0 &&
636 map_by_name(&map, chosen_name+8) != NULL) {
637 pr_err("Array name %s is in use already.\n",
638 chosen_name);
639 close(mdfd);
640 map_unlock(&map);
641 udev_unblock();
642 return 1;
643 }
644 mddev = chosen_name;
645
646 memset(&inf, 0, sizeof(inf));
647 md_get_array_info(mdfd, &inf);
648 if (inf.working_disks != 0) {
649 pr_err("another array by this name is already running.\n");
650 goto abort_locked;
651 }
652
653 /* Ok, lets try some ioctls */
654
655 info.array.level = s->level;
656 info.array.size = s->size;
657 info.array.raid_disks = s->raiddisks;
658 /* The kernel should *know* what md_minor we are dealing
659 * with, but it chooses to trust me instead. Sigh
660 */
661 info.array.md_minor = 0;
662 if (fstat_is_blkdev(mdfd, mddev, &rdev))
663 info.array.md_minor = minor(rdev);
664 info.array.not_persistent = 0;
665
666 if (((s->level == 4 || s->level == 5) &&
667 (insert_point < s->raiddisks || first_missing < s->raiddisks)) ||
668 (s->level == 6 && (insert_point < s->raiddisks ||
669 second_missing < s->raiddisks)) ||
670 (s->level <= 0) || s->assume_clean) {
671 info.array.state = 1; /* clean, but one+ drive will be missing*/
672 info.resync_start = MaxSector;
673 } else {
674 info.array.state = 0; /* not clean, but no errors */
675 info.resync_start = 0;
676 }
677 if (s->level == 10) {
678 /* for raid10, the bitmap size is the capacity of the array,
679 * which is array.size * raid_disks / ncopies;
680 * .. but convert to sectors.
681 */
682 int ncopies = ((s->layout>>8) & 255) * (s->layout & 255);
683 bitmapsize = s->size * s->raiddisks / ncopies * 2;
684 /* printf("bms=%llu as=%d rd=%d nc=%d\n", bitmapsize, s->size, s->raiddisks, ncopies);*/
685 } else
686 bitmapsize = s->size * 2;
687
688 /* There is lots of redundancy in these disk counts,
689 * raid_disks is the most meaningful value
690 * it describes the geometry of the array
691 * it is constant
692 * nr_disks is total number of used slots.
693 * it should be raid_disks+spare_disks
694 * spare_disks is the number of extra disks present
695 * see above
696 * active_disks is the number of working disks in
697 * active slots. (With raid_disks)
698 * working_disks is the total number of working disks,
699 * including spares
700 * failed_disks is the number of disks marked failed
701 *
702 * Ideally, the kernel would keep these (except raid_disks)
703 * up-to-date as we ADD_NEW_DISK, but it doesn't (yet).
704 * So for now, we assume that all raid and spare
705 * devices will be given.
706 */
707 info.array.spare_disks=s->sparedisks;
708 info.array.failed_disks=missing_disks;
709 info.array.nr_disks = info.array.working_disks
710 + info.array.failed_disks;
711 info.array.layout = s->layout;
712 info.array.chunk_size = s->chunk*1024;
713
714 if (name == NULL || *name == 0) {
715 /* base name on mddev */
716 /* /dev/md0 -> 0
717 * /dev/md_d0 -> d0
718 * /dev/md_foo -> foo
719 * /dev/md/1 -> 1
720 * /dev/md/d1 -> d1
721 * /dev/md/home -> home
722 * /dev/mdhome -> home
723 */
724 /* FIXME compare this with rules in create_mddev */
725 name = strrchr(mddev, '/');
726 if (name) {
727 name++;
728 if (strncmp(name, "md_", 3) == 0 &&
729 strlen(name) > 3 && (name-mddev) == 5 /* /dev/ */)
730 name += 3;
731 else if (strncmp(name, "md", 2) == 0 &&
732 strlen(name) > 2 && isdigit(name[2]) &&
733 (name-mddev) == 5 /* /dev/ */)
734 name += 2;
735 }
736 }
737 if (!st->ss->init_super(st, &info.array, s, name, c->homehost, uuid,
738 data_offset))
739 goto abort_locked;
740
741 total_slots = info.array.nr_disks;
742 st->ss->getinfo_super(st, &info, NULL);
743 if (sysfs_init(&info, mdfd, NULL)) {
744 pr_err("unable to initialize sysfs\n");
745 goto abort_locked;
746 }
747
748 if (did_default && c->verbose >= 0) {
749 if (is_subarray(info.text_version)) {
750 char devnm[32];
751 char *ep;
752 struct mdinfo *mdi;
753
754 strncpy(devnm, info.text_version+1, 32);
755 devnm[31] = 0;
756 ep = strchr(devnm, '/');
757 if (ep)
758 *ep = 0;
759
760 mdi = sysfs_read(-1, devnm, GET_VERSION);
761
762 pr_err("Creating array inside %s container %s\n",
763 mdi?mdi->text_version:"managed", devnm);
764 sysfs_free(mdi);
765 } else
766 pr_err("Defaulting to version %s metadata\n", info.text_version);
767 }
768
769 map_update(&map, fd2devnm(mdfd), info.text_version,
770 info.uuid, chosen_name);
771 /* Keep map locked until devices have been added to array
772 * to stop another mdadm from finding and using those devices.
773 */
774
775 if (s->bitmap_file && (strcmp(s->bitmap_file, "internal") == 0 ||
776 strcmp(s->bitmap_file, "clustered") == 0)) {
777 if (!st->ss->add_internal_bitmap) {
778 pr_err("internal bitmaps not supported with %s metadata\n",
779 st->ss->name);
780 goto abort_locked;
781 }
782 if (st->ss->add_internal_bitmap(st, &s->bitmap_chunk,
783 c->delay, s->write_behind,
784 bitmapsize, 1, major_num)) {
785 pr_err("Given bitmap chunk size not supported.\n");
786 goto abort_locked;
787 }
788 s->bitmap_file = NULL;
789 }
790
791 if (sysfs_init(&info, mdfd, NULL)) {
792 pr_err("unable to initialize sysfs\n");
793 goto abort_locked;
794 }
795
796 if (st->ss->external && st->container_devnm[0]) {
797 /* member */
798
799 /* When creating a member, we need to be careful
800 * to negotiate with mdmon properly.
801 * If it is already running, we cannot write to
802 * the devices and must ask it to do that part.
803 * If it isn't running, we write to the devices,
804 * and then start it.
805 * We hold an exclusive open on the container
806 * device to make sure mdmon doesn't exit after
807 * we checked that it is running.
808 *
809 * For now, fail if it is already running.
810 */
811 container_fd = open_dev_excl(st->container_devnm);
812 if (container_fd < 0) {
813 pr_err("Cannot get exclusive open on container - weird.\n");
814 goto abort_locked;
815 }
816 if (mdmon_running(st->container_devnm)) {
817 if (c->verbose)
818 pr_err("reusing mdmon for %s.\n",
819 st->container_devnm);
820 st->update_tail = &st->updates;
821 } else
822 need_mdmon = 1;
823 }
824 rv = set_array_info(mdfd, st, &info);
825 if (rv) {
826 pr_err("failed to set array info for %s: %s\n",
827 mddev, strerror(errno));
828 goto abort_locked;
829 }
830
831 if (s->bitmap_file) {
832 int uuid[4];
833
834 st->ss->uuid_from_super(st, uuid);
835 if (CreateBitmap(s->bitmap_file, c->force, (char*)uuid, s->bitmap_chunk,
836 c->delay, s->write_behind,
837 bitmapsize,
838 major_num)) {
839 goto abort_locked;
840 }
841 bitmap_fd = open(s->bitmap_file, O_RDWR);
842 if (bitmap_fd < 0) {
843 pr_err("weird: %s cannot be opened\n",
844 s->bitmap_file);
845 goto abort_locked;
846 }
847 if (ioctl(mdfd, SET_BITMAP_FILE, bitmap_fd) < 0) {
848 pr_err("Cannot set bitmap file for %s: %s\n",
849 mddev, strerror(errno));
850 goto abort_locked;
851 }
852 }
853
854 infos = xmalloc(sizeof(*infos) * total_slots);
855 enable_fds(total_slots);
856 for (pass = 1; pass <= 2; pass++) {
857 struct mddev_dev *moved_disk = NULL; /* the disk that was moved out of the insert point */
858
859 for (dnum = 0, raid_disk_num = 0, dv = devlist; dv;
860 dv = (dv->next) ? (dv->next) : moved_disk, dnum++) {
861 int fd;
862 struct mdinfo *inf = &infos[dnum];
863
864 if (dnum >= total_slots)
865 abort();
866 if (dnum == insert_point) {
867 raid_disk_num += 1;
868 moved_disk = dv;
869 continue;
870 }
871 if (strcasecmp(dv->devname, "missing") == 0) {
872 raid_disk_num += 1;
873 continue;
874 }
875 if (have_container)
876 moved_disk = NULL;
877 if (have_container && dnum < info.array.raid_disks - 1)
878 /* repeatedly use the container */
879 moved_disk = dv;
880
881 switch(pass) {
882 case 1:
883 *inf = info;
884
885 inf->disk.number = dnum;
886 inf->disk.raid_disk = raid_disk_num++;
887
888 if (dv->disposition == 'j') {
889 inf->disk.raid_disk = MD_DISK_ROLE_JOURNAL;
890 inf->disk.state = (1<<MD_DISK_JOURNAL);
891 raid_disk_num--;
892 } else if (inf->disk.raid_disk < s->raiddisks)
893 inf->disk.state = (1<<MD_DISK_ACTIVE) |
894 (1<<MD_DISK_SYNC);
895 else
896 inf->disk.state = 0;
897
898 if (dv->writemostly == FlagSet)
899 inf->disk.state |= (1<<MD_DISK_WRITEMOSTLY);
900 if (dv->failfast == FlagSet)
901 inf->disk.state |= (1<<MD_DISK_FAILFAST);
902
903 if (have_container)
904 fd = -1;
905 else {
906 if (st->ss->external &&
907 st->container_devnm[0])
908 fd = open(dv->devname, O_RDWR);
909 else
910 fd = open(dv->devname, O_RDWR|O_EXCL);
911
912 if (fd < 0) {
913 pr_err("failed to open %s after earlier success - aborting\n",
914 dv->devname);
915 goto abort_locked;
916 }
917 if (!fstat_is_blkdev(fd, dv->devname, &rdev))
918 return 1;
919 inf->disk.major = major(rdev);
920 inf->disk.minor = minor(rdev);
921 }
922 if (fd >= 0)
923 remove_partitions(fd);
924 if (st->ss->add_to_super(st, &inf->disk,
925 fd, dv->devname,
926 dv->data_offset)) {
927 ioctl(mdfd, STOP_ARRAY, NULL);
928 goto abort_locked;
929 }
930 st->ss->getinfo_super(st, inf, NULL);
931 safe_mode_delay = inf->safe_mode_delay;
932
933 if (have_container && c->verbose > 0)
934 pr_err("Using %s for device %d\n",
935 map_dev(inf->disk.major,
936 inf->disk.minor,
937 0), dnum);
938
939 if (!have_container) {
940 /* getinfo_super might have lost these ... */
941 inf->disk.major = major(rdev);
942 inf->disk.minor = minor(rdev);
943 }
944 break;
945 case 2:
946 inf->errors = 0;
947
948 rv = add_disk(mdfd, st, &info, inf);
949
950 if (rv) {
951 pr_err("ADD_NEW_DISK for %s failed: %s\n",
952 dv->devname, strerror(errno));
953 goto abort_locked;
954 }
955 break;
956 }
957 if (!have_container &&
958 dv == moved_disk && dnum != insert_point) break;
959 }
960 if (pass == 1) {
961 struct mdinfo info_new;
962 struct map_ent *me = NULL;
963
964 /* check to see if the uuid has changed due to these
965 * metadata changes, and if so update the member array
966 * and container uuid. Note ->write_init_super clears
967 * the subarray cursor such that ->getinfo_super once
968 * again returns container info.
969 */
970 st->ss->getinfo_super(st, &info_new, NULL);
971 if (st->ss->external && s->level != LEVEL_CONTAINER &&
972 !same_uuid(info_new.uuid, info.uuid, 0)) {
973 map_update(&map, fd2devnm(mdfd),
974 info_new.text_version,
975 info_new.uuid, chosen_name);
976 me = map_by_devnm(&map, st->container_devnm);
977 }
978
979 if (st->ss->write_init_super(st)) {
980 st->ss->free_super(st);
981 goto abort_locked;
982 }
983
984 /* update parent container uuid */
985 if (me) {
986 char *path = xstrdup(me->path);
987
988 st->ss->getinfo_super(st, &info_new, NULL);
989 map_update(&map, st->container_devnm,
990 info_new.text_version,
991 info_new.uuid, path);
992 free(path);
993 }
994
995 flush_metadata_updates(st);
996 st->ss->free_super(st);
997 }
998 }
999 map_unlock(&map);
1000 free(infos);
1001
1002 if (s->level == LEVEL_CONTAINER) {
1003 /* No need to start. But we should signal udev to
1004 * create links */
1005 sysfs_uevent(&info, "change");
1006 if (c->verbose >= 0)
1007 pr_err("container %s prepared.\n", mddev);
1008 wait_for(chosen_name, mdfd);
1009 } else if (c->runstop == 1 || subdevs >= s->raiddisks) {
1010 if (st->ss->external) {
1011 int err;
1012 switch(s->level) {
1013 case LEVEL_LINEAR:
1014 case LEVEL_MULTIPATH:
1015 case 0:
1016 err = sysfs_set_str(&info, NULL, "array_state",
1017 c->readonly
1018 ? "readonly"
1019 : "active");
1020 need_mdmon = 0;
1021 break;
1022 default:
1023 err = sysfs_set_str(&info, NULL, "array_state",
1024 "readonly");
1025 break;
1026 }
1027 sysfs_set_safemode(&info, safe_mode_delay);
1028 if (err) {
1029 pr_err("failed to activate array.\n");
1030 ioctl(mdfd, STOP_ARRAY, NULL);
1031 goto abort;
1032 }
1033 } else if (c->readonly &&
1034 sysfs_attribute_available(
1035 &info, NULL, "array_state")) {
1036 if (sysfs_set_str(&info, NULL,
1037 "array_state", "readonly") < 0) {
1038 pr_err("Failed to start array: %s\n",
1039 strerror(errno));
1040 ioctl(mdfd, STOP_ARRAY, NULL);
1041 goto abort;
1042 }
1043 } else {
1044 /* param is not actually used */
1045 mdu_param_t param;
1046 if (ioctl(mdfd, RUN_ARRAY, &param)) {
1047 pr_err("RUN_ARRAY failed: %s\n",
1048 strerror(errno));
1049 if (info.array.chunk_size & (info.array.chunk_size-1)) {
1050 cont_err("Problem may be that chunk size is not a power of 2\n");
1051 }
1052 ioctl(mdfd, STOP_ARRAY, NULL);
1053 goto abort;
1054 }
1055 /* if start_ro module parameter is set, array is
1056 * auto-read-only, which is bad as the resync won't
1057 * start. So lets make it read-write now.
1058 */
1059 ioctl(mdfd, RESTART_ARRAY_RW, NULL);
1060 }
1061 if (c->verbose >= 0)
1062 pr_err("array %s started.\n", mddev);
1063 if (st->ss->external && st->container_devnm[0]) {
1064 if (need_mdmon)
1065 start_mdmon(st->container_devnm);
1066
1067 ping_monitor(st->container_devnm);
1068 close(container_fd);
1069 }
1070 wait_for(chosen_name, mdfd);
1071 } else {
1072 pr_err("not starting array - not enough devices.\n");
1073 }
1074 close(mdfd);
1075 /* Give udev a moment to process the Change event caused
1076 * by the close.
1077 */
1078 usleep(100*1000);
1079 udev_unblock();
1080 return 0;
1081
1082 abort:
1083 udev_unblock();
1084 map_lock(&map);
1085 abort_locked:
1086 map_remove(&map, fd2devnm(mdfd));
1087 map_unlock(&map);
1088
1089 if (mdfd >= 0)
1090 close(mdfd);
1091 return 1;
1092 }
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