]>
git.ipfire.org Git - thirdparty/mdadm.git/blob - Create.c
2 * mdadm - manage Linux "md" devices aka RAID arrays.
4 * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de>
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.
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.
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
22 * Email: <neilb@suse.de>
30 static int default_layout(struct supertype
*st
, int level
, int verbose
)
34 if (st
&& st
->ss
->default_geometry
)
35 st
->ss
->default_geometry(st
, &level
, &layout
, NULL
);
39 default: /* no layout */
43 layout
= 0x102; /* near=2, far=1 */
45 pr_err("layout defaults to n2\n");
49 layout
= map_name(r5layout
, "default");
51 pr_err("layout defaults to %s\n", map_num(r5layout
, layout
));
54 layout
= map_name(faultylayout
, "default");
57 pr_err("layout defaults to %s\n", map_num(faultylayout
, layout
));
65 int Create(struct supertype
*st
, char *mddev
,
66 int chunk
, int level
, int layout
, unsigned long long size
,
67 int raiddisks
, int sparedisks
,
68 char *name
, char *homehost
, int *uuid
,
69 int subdevs
, struct mddev_dev
*devlist
,
70 int runstop
, int readonly
, int verbose
,
71 int force
, int assume_clean
,
72 char *bitmap_file
, int bitmap_chunk
, int write_behind
,
76 * Create a new raid array.
78 * First check that necessary details are available
79 * (i.e. level, raid-disks)
81 * Then check each disk to see what might be on it
82 * and report anything interesting.
84 * If anything looks odd, and runstop not set,
87 * SET_ARRAY_INFO and ADD_NEW_DISK, and
88 * if runstop==run, or raiddisks disks were used,
92 unsigned long long minsize
=0, maxsize
=0;
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 */
108 int have_container
= 0;
109 int container_fd
= -1;
111 unsigned long long bitmapsize
;
112 struct mdinfo info
, *infos
;
114 int do_default_layout
= 0;
115 int do_default_chunk
= 0;
116 unsigned long safe_mode_delay
= 0;
117 char chosen_name
[1024];
118 struct map_ent
*map
= NULL
;
119 unsigned long long newsize
;
121 int major_num
= BITMAP_MAJOR_HI
;
123 memset(&info
, 0, sizeof(info
));
124 if (level
== UnSet
&& st
&& st
->ss
->default_geometry
)
125 st
->ss
->default_geometry(st
, &level
, NULL
, NULL
);
126 if (level
== UnSet
) {
127 pr_err("a RAID level is needed to create an array.\n");
130 if (raiddisks
< 4 && level
== 6) {
131 pr_err("at least 4 raid-devices needed for level 6\n");
134 if (raiddisks
> 256 && level
== 6) {
135 pr_err("no more than 256 raid-devices supported for level 6\n");
138 if (raiddisks
< 2 && level
>= 4) {
139 pr_err("at least 2 raid-devices needed for level 4 or 5\n");
142 if (level
<= 0 && sparedisks
) {
143 pr_err("This level does not support spare devices\n");
147 if (subdevs
== 1 && strcmp(devlist
->devname
, "missing") != 0) {
148 /* If given a single device, it might be a container, and we can
149 * extract a device list from there
151 mdu_array_info_t inf
;
154 memset(&inf
, 0, sizeof(inf
));
155 fd
= open(devlist
->devname
, O_RDONLY
);
157 ioctl(fd
, GET_ARRAY_INFO
, &inf
) == 0 &&
158 inf
.raid_disks
== 0) {
159 /* yep, looks like a container */
161 rv
= st
->ss
->load_container(st
, fd
,
166 st
= super_by_fd(fd
, NULL
);
167 if (st
&& !(rv
= st
->ss
->
168 load_container(st
, fd
,
174 if (have_container
) {
176 first_missing
= subdevs
* 2;
177 second_missing
= subdevs
* 2;
178 insert_point
= subdevs
* 2;
184 if (st
&& st
->ss
->external
&& sparedisks
) {
185 pr_err("This metadata type does not support "
186 "spare disks at create time\n");
189 if (subdevs
> raiddisks
+sparedisks
) {
190 pr_err("You have listed more devices (%d) than are in the array(%d)!\n", subdevs
, raiddisks
+sparedisks
);
193 if (!have_container
&& subdevs
< raiddisks
+sparedisks
) {
194 pr_err("You haven't given enough devices (real or missing) to create this array\n");
197 if (bitmap_file
&& level
<= 0) {
198 pr_err("bitmaps not meaningful with level %s\n",
199 map_num(pers
, level
)?:"given");
203 /* now set some defaults */
206 if (layout
== UnSet
) {
207 do_default_layout
= 1;
208 layout
= default_layout(st
, level
, verbose
);
212 /* check layout fits in array*/
213 if ((layout
&255) * ((layout
>>8)&255) > raiddisks
) {
214 pr_err("that layout requires at least %d devices\n",
215 (layout
&255) * ((layout
>>8)&255));
225 if (chunk
== 0 || chunk
== UnSet
) {
227 do_default_chunk
= 1;
228 /* chunk will be set later */
232 /* a chunksize of zero 0s perfectly valid (and preferred) since 2.6.16 */
233 if (get_linux_version() < 2006016 && chunk
== 0) {
236 pr_err("chunk size defaults to 64K\n");
241 case LEVEL_MULTIPATH
:
242 case LEVEL_CONTAINER
:
246 pr_err("chunk size ignored for this level\n");
250 pr_err("unknown level %d\n", level
);
254 if (size
&& chunk
&& chunk
!= UnSet
)
255 size
&= ~(unsigned long long)(chunk
- 1);
257 if (st
&& ! st
->ss
->validate_geometry(st
, level
, layout
, raiddisks
,
258 &chunk
, size
*2, NULL
, &newsize
, verbose
>=0))
261 if (chunk
&& chunk
!= UnSet
) {
262 newsize
&= ~(unsigned long long)(chunk
*2 - 1);
263 if (do_default_chunk
) {
264 /* default chunk was just set */
267 "defaults to %dK\n", chunk
);
268 size
&= ~(unsigned long long)(chunk
- 1);
269 do_default_chunk
= 0;
276 /* If this is ever reshaped to RAID5, we will
277 * need a chunksize. So round it off a bit
278 * now just to be safe
282 if (size
&& verbose
> 0)
283 pr_err("setting size to %lluK\n",
284 (unsigned long long)size
);
287 /* now look at the subdevs */
288 info
.array
.active_disks
= 0;
289 info
.array
.working_disks
= 0;
291 for (dv
=devlist
; dv
&& !have_container
; dv
=dv
->next
, dnum
++) {
292 char *dname
= dv
->devname
;
293 unsigned long long freesize
;
296 if (strcasecmp(dname
, "missing")==0) {
297 if (first_missing
> dnum
)
298 first_missing
= dnum
;
299 if (second_missing
> dnum
&& dnum
> first_missing
)
300 second_missing
= dnum
;
304 dfd
= open(dname
, O_RDONLY
);
306 pr_err("cannot open %s: %s\n",
307 dname
, strerror(errno
));
310 if (fstat(dfd
, &stb
) != 0 ||
311 (stb
.st_mode
& S_IFMT
) != S_IFBLK
) {
313 pr_err("%s is not a block device\n",
318 info
.array
.working_disks
++;
319 if (dnum
< raiddisks
)
320 info
.array
.active_disks
++;
322 struct createinfo
*ci
= conf_get_create_info();
327 /* Need to choose a default metadata, which is different
328 * depending on geometry of array.
331 char *name
= "default";
332 for(i
=0; !st
&& superlist
[i
]; i
++) {
333 st
= superlist
[i
]->match_metadata_desc(name
);
336 if (do_default_layout
)
337 layout
= default_layout(st
, level
, verbose
);
338 switch (st
->ss
->validate_geometry(
339 st
, level
, layout
, raiddisks
,
340 &chunk
, size
*2, dname
, &freesize
,
342 case -1: /* Not valid, message printed, and not
343 * worth checking any further */
346 case 0: /* Geometry not valid */
349 chunk
= do_default_chunk
? UnSet
: chunk
;
351 case 1: /* All happy */
357 int dfd
= open(dname
, O_RDONLY
|O_EXCL
);
359 pr_err("cannot open %s: %s\n",
360 dname
, strerror(errno
));
363 pr_err("device %s not suitable "
364 "for any style of array\n",
368 if (st
->ss
!= &super0
||
369 st
->minor_version
!= 90)
372 if (do_default_layout
)
373 layout
= default_layout(st
, level
, 0);
374 if (!st
->ss
->validate_geometry(st
, level
, layout
,
376 &chunk
, size
*2, dname
,
380 pr_err("%s is not suitable for "
388 freesize
/= 2; /* convert to K */
389 if (chunk
&& chunk
!= UnSet
) {
390 /* round to chunk size */
391 freesize
= freesize
& ~(chunk
-1);
392 if (do_default_chunk
) {
393 /* default chunk was just set */
396 "defaults to %dK\n", chunk
);
397 size
&= ~(unsigned long long)(chunk
- 1);
398 do_default_chunk
= 0;
402 if (size
&& freesize
< size
) {
403 pr_err("%s is smaller than given size."
404 " %lluK < %lluK + metadata\n",
405 dname
, freesize
, size
);
409 if (maxdisc
== NULL
|| (maxdisc
&& freesize
> maxsize
)) {
413 if (mindisc
==NULL
|| (mindisc
&& freesize
< minsize
)) {
417 if (runstop
!= 1 || verbose
>= 0) {
418 int fd
= open(dname
, O_RDONLY
);
420 pr_err("Cannot open %s: %s\n",
421 dname
, strerror(errno
));
425 warn
|= check_ext2(fd
, dname
);
426 warn
|= check_reiser(fd
, dname
);
427 warn
|= check_raid(fd
, dname
);
428 if (strcmp(st
->ss
->name
, "1.x") == 0 &&
429 st
->minor_version
>= 1)
430 /* metadata at front */
431 warn
|= check_partitions(fd
, dname
, 0, 0);
432 else if (level
== 1 || level
== LEVEL_CONTAINER
433 || (level
== 0 && raiddisks
== 1))
434 /* partitions could be meaningful */
435 warn
|= check_partitions(fd
, dname
, freesize
*2, size
*2);
437 /* partitions cannot be meaningful */
438 warn
|= check_partitions(fd
, dname
, 0, 0);
439 if (strcmp(st
->ss
->name
, "1.x") == 0 &&
440 st
->minor_version
>= 1 &&
443 (warn
& 1024) == 0) {
445 pr_err("Note: this array has metadata at the start and\n"
446 " may not be suitable as a boot device. If you plan to\n"
447 " store '/boot' on this device please ensure that\n"
448 " your boot-loader understands md/v1.x metadata, or use\n"
449 " --metadata=0.90\n");
454 if (raiddisks
+ sparedisks
> st
->max_devs
) {
455 pr_err("Too many devices:"
456 " %s metadata only supports %d\n",
457 st
->ss
->name
, st
->max_devs
);
461 info
.array
.working_disks
= raiddisks
;
463 pr_err("create aborted\n");
467 if (mindisc
== NULL
&& !have_container
) {
468 pr_err("no size and no drives given - aborting create.\n");
471 if (level
> 0 || level
== LEVEL_MULTIPATH
472 || level
== LEVEL_FAULTY
473 || st
->ss
->external
) {
474 /* size is meaningful */
475 if (!st
->ss
->validate_geometry(st
, level
, layout
,
479 pr_err("devices too large for RAID level %d\n", level
);
484 /* If this is ever reshaped to RAID5, we will
485 * need a chunksize. So round it off a bit
486 * now just to be safe
490 pr_err("size set to %lluK\n", size
);
493 if (!have_container
&& level
> 0 && ((maxsize
-size
)*100 > maxsize
)) {
494 if (runstop
!= 1 || verbose
>= 0)
495 pr_err("largest drive (%s) exceeds size (%lluK) by more than 1%%\n",
500 if (st
->ss
->detail_platform
&& st
->ss
->detail_platform(0, 1) != 0) {
501 if (runstop
!= 1 || verbose
>= 0)
502 pr_err("%s unable to enumerate platform support\n"
503 " array may not be compatible with hardware/firmware\n",
510 if (!ask("Continue creating array? ")) {
511 pr_err("create aborted.\n");
516 pr_err("creation continuing despite oddities due to --run\n");
520 /* If this is raid4/5, we want to configure the last active slot
521 * as missing, so that a reconstruct happens (faster than re-parity)
522 * FIX: Can we do this for raid6 as well?
524 if (st
->ss
->external
== 0 &&
525 assume_clean
==0 && force
== 0 && first_missing
>= raiddisks
) {
529 insert_point
= raiddisks
-1;
531 info
.array
.active_disks
--;
538 /* For raid6, if creating with 1 missing drive, make a good drive
539 * into a spare, else the create will fail
541 if (assume_clean
== 0 && force
== 0 && first_missing
< raiddisks
&&
542 st
->ss
->external
== 0 &&
543 second_missing
>= raiddisks
&& level
== 6) {
544 insert_point
= raiddisks
- 1;
545 if (insert_point
== first_missing
)
548 info
.array
.active_disks
--;
552 if (level
<= 0 && first_missing
< subdevs
* 2) {
553 pr_err("This level does not support missing devices\n");
557 /* We need to create the device */
559 mdfd
= create_mddev(mddev
, name
, autof
, LOCAL
, chosen_name
);
564 /* verify if chosen_name is not in use,
565 * it could be in conflict with already existing device
566 * e.g. container, array
568 if (strncmp(chosen_name
, "/dev/md/", 8) == 0
569 && map_by_name(&map
, chosen_name
+8) != NULL
) {
570 pr_err("Array name %s is in use already.\n",
578 vers
= md_get_version(mdfd
);
580 pr_err("Create requires md driver version 0.90.0 or later\n");
583 mdu_array_info_t inf
;
584 memset(&inf
, 0, sizeof(inf
));
585 ioctl(mdfd
, GET_ARRAY_INFO
, &inf
);
586 if (inf
.working_disks
!= 0) {
587 pr_err("another array by this name"
588 " is already running.\n");
593 /* Ok, lets try some ioctls */
595 info
.array
.level
= level
;
596 info
.array
.size
= size
;
597 info
.array
.raid_disks
= raiddisks
;
598 /* The kernel should *know* what md_minor we are dealing
599 * with, but it chooses to trust me instead. Sigh
601 info
.array
.md_minor
= 0;
602 if (fstat(mdfd
, &stb
)==0)
603 info
.array
.md_minor
= minor(stb
.st_rdev
);
604 info
.array
.not_persistent
= 0;
606 if ( ( (level
== 4 || level
== 5) &&
607 (insert_point
< raiddisks
|| first_missing
< raiddisks
) )
609 ( level
== 6 && (insert_point
< raiddisks
610 || second_missing
< raiddisks
))
616 info
.array
.state
= 1; /* clean, but one+ drive will be missing*/
617 info
.resync_start
= MaxSector
;
619 info
.array
.state
= 0; /* not clean, but no errors */
620 info
.resync_start
= 0;
623 /* for raid10, the bitmap size is the capacity of the array,
624 * which is array.size * raid_disks / ncopies;
625 * .. but convert to sectors.
627 int ncopies
= ((layout
>>8) & 255) * (layout
& 255);
628 bitmapsize
= (unsigned long long)size
* raiddisks
/ ncopies
* 2;
629 /* printf("bms=%llu as=%d rd=%d nc=%d\n", bitmapsize, size, raiddisks, ncopies);*/
631 bitmapsize
= (unsigned long long)size
* 2;
633 /* There is lots of redundancy in these disk counts,
634 * raid_disks is the most meaningful value
635 * it describes the geometry of the array
637 * nr_disks is total number of used slots.
638 * it should be raid_disks+spare_disks
639 * spare_disks is the number of extra disks present
641 * active_disks is the number of working disks in
642 * active slots. (With raid_disks)
643 * working_disks is the total number of working disks,
645 * failed_disks is the number of disks marked failed
647 * Ideally, the kernel would keep these (except raid_disks)
648 * up-to-date as we ADD_NEW_DISK, but it doesn't (yet).
649 * So for now, we assume that all raid and spare
650 * devices will be given.
652 info
.array
.spare_disks
=sparedisks
;
653 info
.array
.failed_disks
=missing_disks
;
654 info
.array
.nr_disks
= info
.array
.working_disks
655 + info
.array
.failed_disks
;
656 info
.array
.layout
= layout
;
657 info
.array
.chunk_size
= chunk
*1024;
659 if (name
== NULL
|| *name
== 0) {
660 /* base name on mddev */
665 * /dev/md/home -> home
666 * /dev/mdhome -> home
668 /* FIXME compare this with rules in create_mddev */
669 name
= strrchr(mddev
, '/');
672 if (strncmp(name
, "md_d", 4)==0 &&
675 (name
-mddev
) == 5 /* /dev/ */)
677 else if (strncmp(name
, "md", 2)==0 &&
680 (name
-mddev
) == 5 /* /dev/ */)
684 if (!st
->ss
->init_super(st
, &info
.array
, size
, name
, homehost
, uuid
))
687 total_slots
= info
.array
.nr_disks
;
688 st
->ss
->getinfo_super(st
, &info
, NULL
);
689 sysfs_init(&info
, mdfd
, 0);
691 if (did_default
&& verbose
>= 0) {
692 if (is_subarray(info
.text_version
)) {
693 int dnum
= devname2devnum(info
.text_version
+1);
695 int mdp
= get_mdp_major();
698 path
= map_dev(MD_MAJOR
, dnum
, 1);
700 path
= map_dev(mdp
, (-1-dnum
)<< 6, 1);
702 mdi
= sysfs_read(-1, dnum
, GET_VERSION
);
704 pr_err("Creating array inside "
706 mdi
?mdi
->text_version
:"managed", path
);
709 pr_err("Defaulting to version"
710 " %s metadata\n", info
.text_version
);
713 map_update(&map
, fd2devnum(mdfd
), info
.text_version
,
714 info
.uuid
, chosen_name
);
717 if (bitmap_file
&& vers
< 9003) {
718 major_num
= BITMAP_MAJOR_HOSTENDIAN
;
720 pr_err("Warning - bitmaps created on this kernel are not portable\n"
721 " between different architectured. Consider upgrading the Linux kernel.\n");
725 if (bitmap_file
&& strcmp(bitmap_file
, "internal")==0) {
726 if ((vers
%100) < 2) {
727 pr_err("internal bitmaps not supported by this kernel.\n");
730 if (!st
->ss
->add_internal_bitmap
) {
731 pr_err("internal bitmaps not supported with %s metadata\n",
735 if (!st
->ss
->add_internal_bitmap(st
, &bitmap_chunk
,
737 bitmapsize
, 1, major_num
)) {
738 pr_err("Given bitmap chunk size not supported.\n");
745 sysfs_init(&info
, mdfd
, 0);
747 if (st
->ss
->external
&& st
->container_dev
!= NoMdDev
) {
750 /* When creating a member, we need to be careful
751 * to negotiate with mdmon properly.
752 * If it is already running, we cannot write to
753 * the devices and must ask it to do that part.
754 * If it isn't running, we write to the devices,
756 * We hold an exclusive open on the container
757 * device to make sure mdmon doesn't exit after
758 * we checked that it is running.
760 * For now, fail if it is already running.
762 container_fd
= open_dev_excl(st
->container_dev
);
763 if (container_fd
< 0) {
764 pr_err("Cannot get exclusive "
765 "open on container - weird.\n");
768 if (mdmon_running(st
->container_dev
)) {
770 pr_err("reusing mdmon "
772 devnum2devname(st
->container_dev
));
773 st
->update_tail
= &st
->updates
;
777 rv
= set_array_info(mdfd
, st
, &info
);
779 pr_err("failed to set array info for %s: %s\n",
780 mddev
, strerror(errno
));
787 st
->ss
->uuid_from_super(st
, uuid
);
788 if (CreateBitmap(bitmap_file
, force
, (char*)uuid
, bitmap_chunk
,
794 bitmap_fd
= open(bitmap_file
, O_RDWR
);
796 pr_err("weird: %s cannot be openned\n",
800 if (ioctl(mdfd
, SET_BITMAP_FILE
, bitmap_fd
) < 0) {
801 pr_err("Cannot set bitmap file for %s: %s\n",
802 mddev
, strerror(errno
));
807 infos
= xmalloc(sizeof(*infos
) * total_slots
);
809 for (pass
=1; pass
<=2 ; pass
++) {
810 struct mddev_dev
*moved_disk
= NULL
; /* the disk that was moved out of the insert point */
812 for (dnum
=0, dv
= devlist
; dv
;
813 dv
=(dv
->next
)?(dv
->next
):moved_disk
, dnum
++) {
816 struct mdinfo
*inf
= &infos
[dnum
];
818 if (dnum
>= total_slots
)
820 if (dnum
== insert_point
) {
824 if (strcasecmp(dv
->devname
, "missing")==0)
828 if (have_container
&& dnum
< info
.array
.raid_disks
- 1)
829 /* repeatedly use the container */
836 inf
->disk
.number
= dnum
;
837 inf
->disk
.raid_disk
= dnum
;
838 if (inf
->disk
.raid_disk
< raiddisks
)
839 inf
->disk
.state
= (1<<MD_DISK_ACTIVE
) |
844 if (dv
->writemostly
== 1)
845 inf
->disk
.state
|= (1<<MD_DISK_WRITEMOSTLY
);
850 if (st
->ss
->external
&&
851 st
->container_dev
!= NoMdDev
)
852 fd
= open(dv
->devname
, O_RDWR
);
854 fd
= open(dv
->devname
, O_RDWR
|O_EXCL
);
857 pr_err("failed to open %s "
858 "after earlier success - aborting\n",
863 inf
->disk
.major
= major(stb
.st_rdev
);
864 inf
->disk
.minor
= minor(stb
.st_rdev
);
867 remove_partitions(fd
);
868 if (st
->ss
->add_to_super(st
, &inf
->disk
,
870 ioctl(mdfd
, STOP_ARRAY
, NULL
);
873 st
->ss
->getinfo_super(st
, inf
, NULL
);
874 safe_mode_delay
= inf
->safe_mode_delay
;
876 if (have_container
&& verbose
> 0)
877 pr_err("Using %s for device %d\n",
878 map_dev(inf
->disk
.major
,
882 if (!have_container
) {
883 /* getinfo_super might have lost these ... */
884 inf
->disk
.major
= major(stb
.st_rdev
);
885 inf
->disk
.minor
= minor(stb
.st_rdev
);
891 rv
= add_disk(mdfd
, st
, &info
, inf
);
894 pr_err("ADD_NEW_DISK for %s "
896 dv
->devname
, strerror(errno
));
901 if (!have_container
&&
902 dv
== moved_disk
&& dnum
!= insert_point
) break;
905 struct mdinfo info_new
;
906 struct map_ent
*me
= NULL
;
908 /* check to see if the uuid has changed due to these
909 * metadata changes, and if so update the member array
910 * and container uuid. Note ->write_init_super clears
911 * the subarray cursor such that ->getinfo_super once
912 * again returns container info.
915 st
->ss
->getinfo_super(st
, &info_new
, NULL
);
916 if (st
->ss
->external
&& level
!= LEVEL_CONTAINER
&&
917 !same_uuid(info_new
.uuid
, info
.uuid
, 0)) {
918 map_update(&map
, fd2devnum(mdfd
),
919 info_new
.text_version
,
920 info_new
.uuid
, chosen_name
);
921 me
= map_by_devnum(&map
, st
->container_dev
);
924 if (st
->ss
->write_init_super(st
)) {
925 st
->ss
->free_super(st
);
929 /* update parent container uuid */
931 char *path
= xstrdup(me
->path
);
933 st
->ss
->getinfo_super(st
, &info_new
, NULL
);
934 map_update(&map
, st
->container_dev
,
935 info_new
.text_version
,
936 info_new
.uuid
, path
);
941 flush_metadata_updates(st
);
942 st
->ss
->free_super(st
);
947 if (level
== LEVEL_CONTAINER
) {
948 /* No need to start. But we should signal udev to
950 sysfs_uevent(&info
, "change");
952 pr_err("container %s prepared.\n", mddev
);
953 wait_for(chosen_name
, mdfd
);
954 } else if (runstop
== 1 || subdevs
>= raiddisks
) {
955 if (st
->ss
->external
) {
959 case LEVEL_MULTIPATH
:
961 err
= sysfs_set_str(&info
, NULL
, "array_state",
968 err
= sysfs_set_str(&info
, NULL
, "array_state",
972 sysfs_set_safemode(&info
, safe_mode_delay
);
975 " activate array.\n");
976 ioctl(mdfd
, STOP_ARRAY
, NULL
);
979 } else if (readonly
&&
980 sysfs_attribute_available(
981 &info
, NULL
, "array_state")) {
982 if (sysfs_set_str(&info
, NULL
,
983 "array_state", "readonly") < 0) {
984 pr_err("Failed to start array: %s\n",
986 ioctl(mdfd
, STOP_ARRAY
, NULL
);
990 /* param is not actually used */
992 if (ioctl(mdfd
, RUN_ARRAY
, ¶m
)) {
993 pr_err("RUN_ARRAY failed: %s\n",
995 if (info
.array
.chunk_size
& (info
.array
.chunk_size
-1)) {
996 cont_err("Problem may be that "
997 "chunk size is not a power of 2\n");
999 ioctl(mdfd
, STOP_ARRAY
, NULL
);
1004 pr_err("array %s started.\n", mddev
);
1005 if (st
->ss
->external
&& st
->container_dev
!= NoMdDev
) {
1007 start_mdmon(st
->container_dev
);
1009 ping_monitor_by_id(st
->container_dev
);
1010 close(container_fd
);
1012 wait_for(chosen_name
, mdfd
);
1014 pr_err("not starting array - not enough devices.\n");
1022 map_remove(&map
, fd2devnum(mdfd
));