]>
git.ipfire.org Git - thirdparty/mdadm.git/blob - Create.c
b200d9767bb616aeb44693ae322ef7dd77e76728
2 * mdadm - manage Linux "md" devices aka RAID arrays.
4 * Copyright (C) 2001-2013 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
));
64 int Create(struct supertype
*st
, char *mddev
,
65 char *name
, int *uuid
,
66 int subdevs
, struct mddev_dev
*devlist
,
68 struct context
*c
, unsigned long long data_offset
)
71 * Create a new raid array.
73 * First check that necessary details are available
74 * (i.e. level, raid-disks)
76 * Then check each disk to see what might be on it
77 * and report anything interesting.
79 * If anything looks odd, and runstop not set,
82 * SET_ARRAY_INFO and ADD_NEW_DISK, and
83 * if runstop==run, or raiddisks disks were used,
87 unsigned long long minsize
=0, maxsize
=0;
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 */
103 int have_container
= 0;
104 int container_fd
= -1;
106 unsigned long long bitmapsize
;
107 struct mdinfo info
, *infos
;
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
;
116 int major_num
= BITMAP_MAJOR_HI
;
117 if (s
->bitmap_file
&& strcmp(s
->bitmap_file
, "clustered") == 0)
118 major_num
= BITMAP_MAJOR_CLUSTERED
;
120 memset(&info
, 0, sizeof(info
));
121 if (s
->level
== UnSet
&& st
&& st
->ss
->default_geometry
)
122 st
->ss
->default_geometry(st
, &s
->level
, NULL
, NULL
);
123 if (s
->level
== UnSet
) {
124 pr_err("a RAID level is needed to create an array.\n");
127 if (s
->raiddisks
< 4 && s
->level
== 6) {
128 pr_err("at least 4 raid-devices needed for level 6\n");
131 if (s
->raiddisks
> 256 && s
->level
== 6) {
132 pr_err("no more than 256 raid-devices supported for level 6\n");
135 if (s
->raiddisks
< 2 && s
->level
>= 4) {
136 pr_err("at least 2 raid-devices needed for level 4 or 5\n");
139 if (s
->level
<= 0 && s
->sparedisks
) {
140 pr_err("This level does not support spare devices\n");
144 if (subdevs
== 1 && strcmp(devlist
->devname
, "missing") != 0) {
145 /* If given a single device, it might be a container, and we can
146 * extract a device list from there
148 mdu_array_info_t inf
;
151 memset(&inf
, 0, sizeof(inf
));
152 fd
= open(devlist
->devname
, O_RDONLY
);
154 ioctl(fd
, GET_ARRAY_INFO
, &inf
) == 0 &&
155 inf
.raid_disks
== 0) {
156 /* yep, looks like a container */
158 rv
= st
->ss
->load_container(st
, fd
,
163 st
= super_by_fd(fd
, NULL
);
164 if (st
&& !(rv
= st
->ss
->
165 load_container(st
, fd
,
171 if (have_container
) {
172 subdevs
= s
->raiddisks
;
173 first_missing
= subdevs
* 2;
174 second_missing
= subdevs
* 2;
175 insert_point
= subdevs
* 2;
181 if (st
&& st
->ss
->external
&& s
->sparedisks
) {
182 pr_err("This metadata type does not support spare disks at create time\n");
185 if (subdevs
> s
->raiddisks
+s
->sparedisks
) {
186 pr_err("You have listed more devices (%d) than are in the array(%d)!\n", subdevs
, s
->raiddisks
+s
->sparedisks
);
189 if (!have_container
&& subdevs
< s
->raiddisks
+s
->sparedisks
) {
190 pr_err("You haven't given enough devices (real or missing) to create this array\n");
193 if (s
->bitmap_file
&& s
->level
<= 0) {
194 pr_err("bitmaps not meaningful with level %s\n",
195 map_num(pers
, s
->level
)?:"given");
199 /* now set some defaults */
201 if (s
->layout
== UnSet
) {
202 do_default_layout
= 1;
203 s
->layout
= default_layout(st
, s
->level
, c
->verbose
);
207 /* check layout fits in array*/
208 if ((s
->layout
&255) * ((s
->layout
>>8)&255) > s
->raiddisks
) {
209 pr_err("that layout requires at least %d devices\n",
210 (s
->layout
&255) * ((s
->layout
>>8)&255));
220 if (s
->chunk
== 0 || s
->chunk
== UnSet
) {
222 do_default_chunk
= 1;
223 /* chunk will be set later */
227 /* a chunksize of zero 0s perfectly valid (and preferred) since 2.6.16 */
228 if (get_linux_version() < 2006016 && s
->chunk
== 0) {
231 pr_err("chunk size defaults to 64K\n");
236 case LEVEL_MULTIPATH
:
237 case LEVEL_CONTAINER
:
241 pr_err("chunk size ignored for this level\n");
245 pr_err("unknown level %d\n", s
->level
);
248 if (s
->size
== MAX_SIZE
)
249 /* use '0' to mean 'max' now... */
251 if (s
->size
&& s
->chunk
&& s
->chunk
!= UnSet
)
252 s
->size
&= ~(unsigned long long)(s
->chunk
- 1);
253 newsize
= s
->size
* 2;
254 if (st
&& ! st
->ss
->validate_geometry(st
, s
->level
, s
->layout
, s
->raiddisks
,
255 &s
->chunk
, s
->size
*2,
257 &newsize
, c
->verbose
>=0))
260 if (s
->chunk
&& s
->chunk
!= UnSet
) {
261 newsize
&= ~(unsigned long long)(s
->chunk
*2 - 1);
262 if (do_default_chunk
) {
263 /* default chunk was just set */
265 pr_err("chunk size defaults to %dK\n", s
->chunk
);
266 s
->size
&= ~(unsigned long long)(s
->chunk
- 1);
267 do_default_chunk
= 0;
272 s
->size
= newsize
/ 2;
274 /* If this is ever reshaped to RAID5, we will
275 * need a chunksize. So round it off a bit
276 * now just to be safe
278 s
->size
&= ~(64ULL-1);
280 if (s
->size
&& c
->verbose
> 0)
281 pr_err("setting size to %lluK\n", s
->size
);
284 /* now look at the subdevs */
285 info
.array
.active_disks
= 0;
286 info
.array
.working_disks
= 0;
288 for (dv
= devlist
; dv
; dv
= dv
->next
)
289 if (data_offset
== VARIABLE_OFFSET
)
290 dv
->data_offset
= INVALID_SECTORS
;
292 dv
->data_offset
= data_offset
;
294 for (dv
=devlist
; dv
&& !have_container
; dv
=dv
->next
, dnum
++) {
295 char *dname
= dv
->devname
;
296 unsigned long long freesize
;
300 if (strcasecmp(dname
, "missing")==0) {
301 if (first_missing
> dnum
)
302 first_missing
= dnum
;
303 if (second_missing
> dnum
&& dnum
> first_missing
)
304 second_missing
= dnum
;
308 if (data_offset
== VARIABLE_OFFSET
) {
309 doff
= strchr(dname
, ':');
312 dv
->data_offset
= parse_size(doff
);
314 dv
->data_offset
= INVALID_SECTORS
;
316 dv
->data_offset
= data_offset
;
318 dfd
= open(dname
, O_RDONLY
);
320 pr_err("cannot open %s: %s\n",
321 dname
, strerror(errno
));
324 if (fstat(dfd
, &stb
) != 0 ||
325 (stb
.st_mode
& S_IFMT
) != S_IFBLK
) {
327 pr_err("%s is not a block device\n",
332 info
.array
.working_disks
++;
333 if (dnum
< s
->raiddisks
)
334 info
.array
.active_disks
++;
336 struct createinfo
*ci
= conf_get_create_info();
341 /* Need to choose a default metadata, which is different
342 * depending on geometry of array.
345 char *name
= "default";
346 for(i
=0; !st
&& superlist
[i
]; i
++) {
347 st
= superlist
[i
]->match_metadata_desc(name
);
350 if (do_default_layout
)
351 s
->layout
= default_layout(st
, s
->level
, c
->verbose
);
352 switch (st
->ss
->validate_geometry(
353 st
, s
->level
, s
->layout
, s
->raiddisks
,
354 &s
->chunk
, s
->size
*2,
355 dv
->data_offset
, dname
,
356 &freesize
, c
->verbose
> 0)) {
357 case -1: /* Not valid, message printed, and not
358 * worth checking any further */
361 case 0: /* Geometry not valid */
364 s
->chunk
= do_default_chunk
? UnSet
: s
->chunk
;
366 case 1: /* All happy */
372 int dfd
= open(dname
, O_RDONLY
|O_EXCL
);
374 pr_err("cannot open %s: %s\n",
375 dname
, strerror(errno
));
378 pr_err("device %s not suitable for any style of array\n",
382 if (st
->ss
!= &super0
||
383 st
->minor_version
!= 90)
386 if (do_default_layout
)
387 s
->layout
= default_layout(st
, s
->level
, 0);
388 if (!st
->ss
->validate_geometry(st
, s
->level
, s
->layout
,
390 &s
->chunk
, s
->size
*2,
395 pr_err("%s is not suitable for this array.\n",
402 freesize
/= 2; /* convert to K */
403 if (s
->chunk
&& s
->chunk
!= UnSet
) {
404 /* round to chunk size */
405 freesize
= freesize
& ~(s
->chunk
-1);
406 if (do_default_chunk
) {
407 /* default chunk was just set */
409 pr_err("chunk size defaults to %dK\n", s
->chunk
);
410 s
->size
&= ~(unsigned long long)(s
->chunk
- 1);
411 do_default_chunk
= 0;
415 pr_err("no free space left on %s\n", dname
);
420 if (s
->size
&& freesize
< s
->size
) {
421 pr_err("%s is smaller than given size. %lluK < %lluK + metadata\n",
422 dname
, freesize
, s
->size
);
426 if (maxdisc
== NULL
|| (maxdisc
&& freesize
> maxsize
)) {
430 if (mindisc
==NULL
|| (mindisc
&& freesize
< minsize
)) {
434 if (c
->runstop
!= 1 || c
->verbose
>= 0) {
435 int fd
= open(dname
, O_RDONLY
);
437 pr_err("Cannot open %s: %s\n",
438 dname
, strerror(errno
));
442 warn
|= check_ext2(fd
, dname
);
443 warn
|= check_reiser(fd
, dname
);
444 warn
|= check_raid(fd
, dname
);
445 if (strcmp(st
->ss
->name
, "1.x") == 0 &&
446 st
->minor_version
>= 1)
447 /* metadata at front */
448 warn
|= check_partitions(fd
, dname
, 0, 0);
449 else if (s
->level
== 1 || s
->level
== LEVEL_CONTAINER
450 || (s
->level
== 0 && s
->raiddisks
== 1))
451 /* partitions could be meaningful */
452 warn
|= check_partitions(fd
, dname
, freesize
*2, s
->size
*2);
454 /* partitions cannot be meaningful */
455 warn
|= check_partitions(fd
, dname
, 0, 0);
456 if (strcmp(st
->ss
->name
, "1.x") == 0 &&
457 st
->minor_version
>= 1 &&
460 (warn
& 1024) == 0) {
462 pr_err("Note: this array has metadata at the start and\n"
463 " may not be suitable as a boot device. If you plan to\n"
464 " store '/boot' on this device please ensure that\n"
465 " your boot-loader understands md/v1.x metadata, or use\n"
466 " --metadata=0.90\n");
471 if (s
->raiddisks
+ s
->sparedisks
> st
->max_devs
) {
472 pr_err("Too many devices: %s metadata only supports %d\n",
473 st
->ss
->name
, st
->max_devs
);
477 info
.array
.working_disks
= s
->raiddisks
;
479 pr_err("create aborted\n");
483 if (mindisc
== NULL
&& !have_container
) {
484 pr_err("no size and no drives given - aborting create.\n");
487 if (s
->level
> 0 || s
->level
== LEVEL_MULTIPATH
488 || s
->level
== LEVEL_FAULTY
489 || st
->ss
->external
) {
490 /* size is meaningful */
491 if (!st
->ss
->validate_geometry(st
, s
->level
, s
->layout
,
493 &s
->chunk
, minsize
*2,
496 pr_err("devices too large for RAID level %d\n", s
->level
);
501 /* If this is ever reshaped to RAID5, we will
502 * need a chunksize. So round it off a bit
503 * now just to be safe
505 s
->size
&= ~(64ULL-1);
507 pr_err("size set to %lluK\n", s
->size
);
511 if (!s
->bitmap_file
&&
513 st
->ss
->add_internal_bitmap
&&
514 (s
->write_behind
|| s
->size
> 100*1024*1024ULL)) {
516 pr_err("automatically enabling write-intent bitmap on large array\n");
517 s
->bitmap_file
= "internal";
519 if (s
->bitmap_file
&& strcmp(s
->bitmap_file
, "none") == 0)
520 s
->bitmap_file
= NULL
;
522 if (!have_container
&& s
->level
> 0 && ((maxsize
-s
->size
)*100 > maxsize
)) {
523 if (c
->runstop
!= 1 || c
->verbose
>= 0)
524 pr_err("largest drive (%s) exceeds size (%lluK) by more than 1%%\n",
529 if (st
->ss
->detail_platform
&& st
->ss
->detail_platform(0, 1, NULL
) != 0) {
530 if (c
->runstop
!= 1 || c
->verbose
>= 0)
531 pr_err("%s unable to enumerate platform support\n"
532 " array may not be compatible with hardware/firmware\n",
536 st
->nodes
= c
->nodes
;
537 st
->cluster_name
= c
->homecluster
;
540 if (c
->runstop
!= 1) {
541 if (!ask("Continue creating array? ")) {
542 pr_err("create aborted.\n");
547 pr_err("creation continuing despite oddities due to --run\n");
551 /* If this is raid4/5, we want to configure the last active slot
552 * as missing, so that a reconstruct happens (faster than re-parity)
553 * FIX: Can we do this for raid6 as well?
555 if (st
->ss
->external
== 0 &&
556 s
->assume_clean
==0 && c
->force
== 0 && first_missing
>= s
->raiddisks
) {
557 switch ( s
->level
) {
560 insert_point
= s
->raiddisks
-1;
562 info
.array
.active_disks
--;
569 /* For raid6, if creating with 1 missing drive, make a good drive
570 * into a spare, else the create will fail
572 if (s
->assume_clean
== 0 && c
->force
== 0 && first_missing
< s
->raiddisks
&&
573 st
->ss
->external
== 0 &&
574 second_missing
>= s
->raiddisks
&& s
->level
== 6) {
575 insert_point
= s
->raiddisks
- 1;
576 if (insert_point
== first_missing
)
579 info
.array
.active_disks
--;
583 if (s
->level
<= 0 && first_missing
< subdevs
* 2) {
584 pr_err("This level does not support missing devices\n");
588 /* We need to create the device */
590 mdfd
= create_mddev(mddev
, name
, c
->autof
, LOCAL
, chosen_name
);
595 /* verify if chosen_name is not in use,
596 * it could be in conflict with already existing device
597 * e.g. container, array
599 if (strncmp(chosen_name
, "/dev/md/", 8) == 0
600 && map_by_name(&map
, chosen_name
+8) != NULL
) {
601 pr_err("Array name %s is in use already.\n",
609 vers
= md_get_version(mdfd
);
611 pr_err("Create requires md driver version 0.90.0 or later\n");
614 mdu_array_info_t inf
;
615 memset(&inf
, 0, sizeof(inf
));
616 ioctl(mdfd
, GET_ARRAY_INFO
, &inf
);
617 if (inf
.working_disks
!= 0) {
618 pr_err("another array by this name is already running.\n");
623 /* Ok, lets try some ioctls */
625 info
.array
.level
= s
->level
;
626 info
.array
.size
= s
->size
;
627 info
.array
.raid_disks
= s
->raiddisks
;
628 /* The kernel should *know* what md_minor we are dealing
629 * with, but it chooses to trust me instead. Sigh
631 info
.array
.md_minor
= 0;
632 if (fstat(mdfd
, &stb
)==0)
633 info
.array
.md_minor
= minor(stb
.st_rdev
);
634 info
.array
.not_persistent
= 0;
636 if ( ( (s
->level
== 4 || s
->level
== 5) &&
637 (insert_point
< s
->raiddisks
|| first_missing
< s
->raiddisks
) )
639 ( s
->level
== 6 && (insert_point
< s
->raiddisks
640 || second_missing
< s
->raiddisks
))
646 info
.array
.state
= 1; /* clean, but one+ drive will be missing*/
647 info
.resync_start
= MaxSector
;
649 info
.array
.state
= 0; /* not clean, but no errors */
650 info
.resync_start
= 0;
652 if (s
->level
== 10) {
653 /* for raid10, the bitmap size is the capacity of the array,
654 * which is array.size * raid_disks / ncopies;
655 * .. but convert to sectors.
657 int ncopies
= ((s
->layout
>>8) & 255) * (s
->layout
& 255);
658 bitmapsize
= s
->size
* s
->raiddisks
/ ncopies
* 2;
659 /* printf("bms=%llu as=%d rd=%d nc=%d\n", bitmapsize, s->size, s->raiddisks, ncopies);*/
661 bitmapsize
= s
->size
* 2;
663 /* There is lots of redundancy in these disk counts,
664 * raid_disks is the most meaningful value
665 * it describes the geometry of the array
667 * nr_disks is total number of used slots.
668 * it should be raid_disks+spare_disks
669 * spare_disks is the number of extra disks present
671 * active_disks is the number of working disks in
672 * active slots. (With raid_disks)
673 * working_disks is the total number of working disks,
675 * failed_disks is the number of disks marked failed
677 * Ideally, the kernel would keep these (except raid_disks)
678 * up-to-date as we ADD_NEW_DISK, but it doesn't (yet).
679 * So for now, we assume that all raid and spare
680 * devices will be given.
682 info
.array
.spare_disks
=s
->sparedisks
;
683 info
.array
.failed_disks
=missing_disks
;
684 info
.array
.nr_disks
= info
.array
.working_disks
685 + info
.array
.failed_disks
;
686 info
.array
.layout
= s
->layout
;
687 info
.array
.chunk_size
= s
->chunk
*1024;
689 if (name
== NULL
|| *name
== 0) {
690 /* base name on mddev */
696 * /dev/md/home -> home
697 * /dev/mdhome -> home
699 /* FIXME compare this with rules in create_mddev */
700 name
= strrchr(mddev
, '/');
703 if (strncmp(name
, "md_", 3)==0 &&
705 (name
-mddev
) == 5 /* /dev/ */)
707 else if (strncmp(name
, "md", 2)==0 &&
710 (name
-mddev
) == 5 /* /dev/ */)
714 if (!st
->ss
->init_super(st
, &info
.array
, s
->size
, name
, c
->homehost
, uuid
,
718 total_slots
= info
.array
.nr_disks
;
719 st
->ss
->getinfo_super(st
, &info
, NULL
);
720 sysfs_init(&info
, mdfd
, NULL
);
722 if (did_default
&& c
->verbose
>= 0) {
723 if (is_subarray(info
.text_version
)) {
728 strncpy(devnm
, info
.text_version
+1, 32);
730 ep
= strchr(devnm
, '/');
734 mdi
= sysfs_read(-1, devnm
, GET_VERSION
);
736 pr_err("Creating array inside %s container %s\n",
737 mdi
?mdi
->text_version
:"managed", devnm
);
740 pr_err("Defaulting to version %s metadata\n", info
.text_version
);
743 map_update(&map
, fd2devnm(mdfd
), info
.text_version
,
744 info
.uuid
, chosen_name
);
745 /* Keep map locked until devices have been added to array
746 * to stop another mdadm from finding and using those devices.
749 if (s
->bitmap_file
&& vers
< 9003) {
750 major_num
= BITMAP_MAJOR_HOSTENDIAN
;
752 pr_err("Warning - bitmaps created on this kernel are not portable\n"
753 " between different architectured. Consider upgrading the Linux kernel.\n");
757 if (s
->bitmap_file
&& (strcmp(s
->bitmap_file
, "internal")==0 ||
758 strcmp(s
->bitmap_file
, "clustered")==0)) {
759 if ((vers
%100) < 2) {
760 pr_err("internal bitmaps not supported by this kernel.\n");
763 if (!st
->ss
->add_internal_bitmap
) {
764 pr_err("internal bitmaps not supported with %s metadata\n",
768 if (!st
->ss
->add_internal_bitmap(st
, &s
->bitmap_chunk
,
769 c
->delay
, s
->write_behind
,
770 bitmapsize
, 1, major_num
)) {
771 pr_err("Given bitmap chunk size not supported.\n");
774 s
->bitmap_file
= NULL
;
777 sysfs_init(&info
, mdfd
, NULL
);
779 if (st
->ss
->external
&& st
->container_devnm
[0]) {
782 /* When creating a member, we need to be careful
783 * to negotiate with mdmon properly.
784 * If it is already running, we cannot write to
785 * the devices and must ask it to do that part.
786 * If it isn't running, we write to the devices,
788 * We hold an exclusive open on the container
789 * device to make sure mdmon doesn't exit after
790 * we checked that it is running.
792 * For now, fail if it is already running.
794 container_fd
= open_dev_excl(st
->container_devnm
);
795 if (container_fd
< 0) {
796 pr_err("Cannot get exclusive open on container - weird.\n");
799 if (mdmon_running(st
->container_devnm
)) {
801 pr_err("reusing mdmon for %s.\n",
802 st
->container_devnm
);
803 st
->update_tail
= &st
->updates
;
807 rv
= set_array_info(mdfd
, st
, &info
);
809 pr_err("failed to set array info for %s: %s\n",
810 mddev
, strerror(errno
));
814 if (s
->bitmap_file
) {
817 st
->ss
->uuid_from_super(st
, uuid
);
818 if (CreateBitmap(s
->bitmap_file
, c
->force
, (char*)uuid
, s
->bitmap_chunk
,
819 c
->delay
, s
->write_behind
,
824 bitmap_fd
= open(s
->bitmap_file
, O_RDWR
);
826 pr_err("weird: %s cannot be openned\n",
830 if (ioctl(mdfd
, SET_BITMAP_FILE
, bitmap_fd
) < 0) {
831 pr_err("Cannot set bitmap file for %s: %s\n",
832 mddev
, strerror(errno
));
837 infos
= xmalloc(sizeof(*infos
) * total_slots
);
838 enable_fds(total_slots
);
839 for (pass
=1; pass
<=2 ; pass
++) {
840 struct mddev_dev
*moved_disk
= NULL
; /* the disk that was moved out of the insert point */
842 for (dnum
=0, dv
= devlist
; dv
;
843 dv
=(dv
->next
)?(dv
->next
):moved_disk
, dnum
++) {
846 struct mdinfo
*inf
= &infos
[dnum
];
848 if (dnum
>= total_slots
)
850 if (dnum
== insert_point
) {
854 if (strcasecmp(dv
->devname
, "missing")==0)
858 if (have_container
&& dnum
< info
.array
.raid_disks
- 1)
859 /* repeatedly use the container */
866 inf
->disk
.number
= dnum
;
867 inf
->disk
.raid_disk
= dnum
;
868 if (inf
->disk
.raid_disk
< s
->raiddisks
)
869 inf
->disk
.state
= (1<<MD_DISK_ACTIVE
) |
874 if (dv
->writemostly
== 1)
875 inf
->disk
.state
|= (1<<MD_DISK_WRITEMOSTLY
);
880 if (st
->ss
->external
&&
881 st
->container_devnm
[0])
882 fd
= open(dv
->devname
, O_RDWR
);
884 fd
= open(dv
->devname
, O_RDWR
|O_EXCL
);
887 pr_err("failed to open %s after earlier success - aborting\n",
892 inf
->disk
.major
= major(stb
.st_rdev
);
893 inf
->disk
.minor
= minor(stb
.st_rdev
);
896 remove_partitions(fd
);
897 if (st
->ss
->add_to_super(st
, &inf
->disk
,
900 ioctl(mdfd
, STOP_ARRAY
, NULL
);
903 st
->ss
->getinfo_super(st
, inf
, NULL
);
904 safe_mode_delay
= inf
->safe_mode_delay
;
906 if (have_container
&& c
->verbose
> 0)
907 pr_err("Using %s for device %d\n",
908 map_dev(inf
->disk
.major
,
912 if (!have_container
) {
913 /* getinfo_super might have lost these ... */
914 inf
->disk
.major
= major(stb
.st_rdev
);
915 inf
->disk
.minor
= minor(stb
.st_rdev
);
921 rv
= add_disk(mdfd
, st
, &info
, inf
);
924 pr_err("ADD_NEW_DISK for %s failed: %s\n",
925 dv
->devname
, strerror(errno
));
930 if (!have_container
&&
931 dv
== moved_disk
&& dnum
!= insert_point
) break;
934 struct mdinfo info_new
;
935 struct map_ent
*me
= NULL
;
937 /* check to see if the uuid has changed due to these
938 * metadata changes, and if so update the member array
939 * and container uuid. Note ->write_init_super clears
940 * the subarray cursor such that ->getinfo_super once
941 * again returns container info.
943 st
->ss
->getinfo_super(st
, &info_new
, NULL
);
944 if (st
->ss
->external
&& s
->level
!= LEVEL_CONTAINER
&&
945 !same_uuid(info_new
.uuid
, info
.uuid
, 0)) {
946 map_update(&map
, fd2devnm(mdfd
),
947 info_new
.text_version
,
948 info_new
.uuid
, chosen_name
);
949 me
= map_by_devnm(&map
, st
->container_devnm
);
952 if (st
->ss
->write_init_super(st
)) {
953 st
->ss
->free_super(st
);
957 /* update parent container uuid */
959 char *path
= xstrdup(me
->path
);
961 st
->ss
->getinfo_super(st
, &info_new
, NULL
);
962 map_update(&map
, st
->container_devnm
,
963 info_new
.text_version
,
964 info_new
.uuid
, path
);
968 flush_metadata_updates(st
);
969 st
->ss
->free_super(st
);
975 if (s
->level
== LEVEL_CONTAINER
) {
976 /* No need to start. But we should signal udev to
978 sysfs_uevent(&info
, "change");
980 pr_err("container %s prepared.\n", mddev
);
981 wait_for(chosen_name
, mdfd
);
982 } else if (c
->runstop
== 1 || subdevs
>= s
->raiddisks
) {
983 if (st
->ss
->external
) {
987 case LEVEL_MULTIPATH
:
989 err
= sysfs_set_str(&info
, NULL
, "array_state",
996 err
= sysfs_set_str(&info
, NULL
, "array_state",
1000 sysfs_set_safemode(&info
, safe_mode_delay
);
1002 pr_err("failed to activate array.\n");
1003 ioctl(mdfd
, STOP_ARRAY
, NULL
);
1006 } else if (c
->readonly
&&
1007 sysfs_attribute_available(
1008 &info
, NULL
, "array_state")) {
1009 if (sysfs_set_str(&info
, NULL
,
1010 "array_state", "readonly") < 0) {
1011 pr_err("Failed to start array: %s\n",
1013 ioctl(mdfd
, STOP_ARRAY
, NULL
);
1017 /* param is not actually used */
1019 if (ioctl(mdfd
, RUN_ARRAY
, ¶m
)) {
1020 pr_err("RUN_ARRAY failed: %s\n",
1022 if (info
.array
.chunk_size
& (info
.array
.chunk_size
-1)) {
1023 cont_err("Problem may be that chunk size is not a power of 2\n");
1025 ioctl(mdfd
, STOP_ARRAY
, NULL
);
1028 /* if start_ro module parameter is set, array is
1029 * auto-read-only, which is bad as the resync won't
1030 * start. So lets make it read-write now.
1032 ioctl(mdfd
, RESTART_ARRAY_RW
, NULL
);
1034 if (c
->verbose
>= 0)
1035 pr_err("array %s started.\n", mddev
);
1036 if (st
->ss
->external
&& st
->container_devnm
[0]) {
1038 start_mdmon(st
->container_devnm
);
1040 ping_monitor(st
->container_devnm
);
1041 close(container_fd
);
1043 wait_for(chosen_name
, mdfd
);
1045 pr_err("not starting array - not enough devices.\n");
1053 map_remove(&map
, fd2devnm(mdfd
));