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