]>
git.ipfire.org Git - thirdparty/mdadm.git/blob - Manage.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 #define REGISTER_DEV _IO (MD_MAJOR, 1)
31 #define START_MD _IO (MD_MAJOR, 2)
32 #define STOP_MD _IO (MD_MAJOR, 3)
34 int Manage_ro(char *devname
, int fd
, int readonly
)
36 /* switch to readonly or rw
39 * first check that array is runing
40 * use RESTART_ARRAY_RW or STOP_ARRAY_RO
43 mdu_array_info_t array
;
49 if (md_get_version(fd
) < 9000) {
50 fprintf(stderr
, Name
": need md driver version 0.90.0 or later\n");
54 /* If this is an externally-manage array, we need to modify the
55 * metadata_version so that mdmon doesn't undo our change.
57 mdi
= sysfs_read(fd
, -1, GET_LEVEL
|GET_VERSION
);
59 mdi
->array
.major_version
== -1 &&
60 is_subarray(mdi
->text_version
)) {
62 strcpy(vers
, "external:");
63 strcat(vers
, mdi
->text_version
);
66 /* We set readonly ourselves. */
68 sysfs_set_str(mdi
, NULL
, "metadata_version", vers
);
71 rv
= sysfs_set_str(mdi
, NULL
, "array_state", "readonly");
74 fprintf(stderr
, Name
": failed to set readonly for %s: %s\n",
75 devname
, strerror(errno
));
77 vers
[9] = mdi
->text_version
[0];
78 sysfs_set_str(mdi
, NULL
, "metadata_version", vers
);
84 /* We cannot set read/write - must signal mdmon */
86 sysfs_set_str(mdi
, NULL
, "metadata_version", vers
);
88 cp
= strchr(vers
+10, '/');
91 ping_monitor(vers
+10);
92 if (mdi
->array
.level
<= 0)
93 sysfs_set_str(mdi
, NULL
, "array_state", "active");
98 if (ioctl(fd
, GET_ARRAY_INFO
, &array
)) {
99 fprintf(stderr
, Name
": %s does not appear to be active.\n",
106 if (ioctl(fd
, STOP_ARRAY_RO
, NULL
)) {
107 fprintf(stderr
, Name
": failed to set readonly for %s: %s\n",
108 devname
, strerror(errno
));
112 } else if (readonly
< 0) {
113 if (ioctl(fd
, RESTART_ARRAY_RW
, NULL
)) {
114 fprintf(stderr
, Name
": failed to set writable for %s: %s\n",
115 devname
, strerror(errno
));
130 static void remove_devices(int devnum
, char *path
)
133 * Remove names at 'path' - possibly with
134 * partition suffixes - which link to the 'standard'
135 * name for devnum. These were probably created
136 * by mdadm when the array was assembled.
150 sprintf(base
, "/dev/md%d", devnum
);
152 sprintf(base
, "/dev/md_d%d", -1-devnum
);
153 be
= base
+ strlen(base
);
155 path2
= malloc(strlen(path
)+20);
157 pe
= path2
+ strlen(path2
);
159 for (part
= 0; part
< 16; part
++) {
161 sprintf(be
, "p%d", part
);
164 sprintf(pe
, "p%d", part
);
166 sprintf(pe
, "%d", part
);
168 n
= readlink(path2
, link
, sizeof(link
));
169 if (n
> 0 && (int)strlen(base
) == n
&&
170 strncmp(link
, base
, n
) == 0)
177 int Manage_runstop(char *devname
, int fd
, int runstop
, int quiet
)
179 /* Run or stop the array. array must already be configured
181 * Only print failure messages if quiet == 0;
182 * quiet > 0 means really be quiet
183 * quiet < 0 means we will try again if it fails.
185 mdu_param_t param
; /* unused */
187 if (runstop
== -1 && md_get_version(fd
) < 9000) {
188 if (ioctl(fd
, STOP_MD
, 0)) {
189 if (quiet
== 0) fprintf(stderr
,
190 Name
": stopping device %s "
192 devname
, strerror(errno
));
197 if (md_get_version(fd
) < 9000) {
198 fprintf(stderr
, Name
": need md driver version 0.90.0 or later\n");
202 if (ioctl(fd, GET_ARRAY_INFO, &array)) {
203 fprintf(stderr, Name ": %s does not appear to be active.\n",
209 if (ioctl(fd
, RUN_ARRAY
, ¶m
)) {
210 fprintf(stderr
, Name
": failed to run array %s: %s\n",
211 devname
, strerror(errno
));
215 fprintf(stderr
, Name
": started %s\n", devname
);
216 } else if (runstop
< 0){
217 struct map_ent
*map
= NULL
;
223 /* If this is an mdmon managed array, just write 'inactive'
224 * to the array state and let mdmon clear up.
226 devnum
= fd2devnum(fd
);
227 /* Get EXCL access first. If this fails, then attempting
228 * to stop is probably a bad idea.
231 fd
= open(devname
, O_RDONLY
|O_EXCL
);
232 if (fd
< 0 || fd2devnum(fd
) != devnum
) {
236 Name
": Cannot get exclusive access to %s:"
238 "process, mounted filesystem "
239 "or active volume group?\n",
243 mdi
= sysfs_read(fd
, -1, GET_LEVEL
|GET_VERSION
);
245 mdi
->array
.level
> 0 &&
246 is_subarray(mdi
->text_version
)) {
248 /* This is mdmon managed. */
253 (err
= sysfs_set_str(mdi
, NULL
,
262 ": failed to stop array %s: %s\n",
263 devname
, strerror(errno
));
267 /* Give monitor a chance to act */
268 ping_monitor(mdi
->text_version
);
270 fd
= open_dev_excl(devnum
);
273 ": failed to completely stop %s"
274 ": Device is busy\n",
279 mdi
->array
.major_version
== -1 &&
280 mdi
->array
.minor_version
== -2 &&
281 !is_subarray(mdi
->text_version
)) {
282 struct mdstat_ent
*mds
, *m
;
283 /* container, possibly mdmon-managed.
284 * Make sure mdmon isn't opening it, which
285 * would interfere with the 'stop'
287 ping_monitor(mdi
->sys_name
);
289 /* now check that there are no existing arrays
290 * which are members of this array
292 mds
= mdstat_read(0, 0);
293 for (m
=mds
; m
; m
=m
->next
)
294 if (m
->metadata_version
&&
295 strncmp(m
->metadata_version
, "external:", 9)==0 &&
296 is_subarray(m
->metadata_version
+9) &&
297 devname2devnum(m
->metadata_version
+10) == devnum
) {
300 ": Cannot stop container %s: "
301 "member %s still active\n",
310 /* As we have an O_EXCL open, any use of the device
311 * which blocks STOP_ARRAY is probably a transient use,
312 * so it is reasonable to retry for a while - 5 seconds.
315 while (count
&& fd
>= 0
316 && (err
= ioctl(fd
, STOP_ARRAY
, NULL
)) < 0
321 if (fd
>= 0 && err
) {
324 ": failed to stop array %s: %s\n",
325 devname
, strerror(errno
));
327 fprintf(stderr
, "Perhaps a running "
328 "process, mounted filesystem "
329 "or active volume group?\n");
335 /* prior to 2.6.28, KOBJ_CHANGE was not sent when an md array
336 * was stopped, so We'll do it here just to be sure. Drop any
337 * partitions as well...
340 ioctl(fd
, BLKRRPART
, 0);
342 sysfs_uevent(mdi
, "change");
345 if (devnum
!= NoMdDev
&&
346 (stat("/dev/.udev", &stb
) != 0 ||
347 check_env("MDADM_NO_UDEV"))) {
348 struct map_ent
*mp
= map_by_devnum(&map
, devnum
);
349 remove_devices(devnum
, mp
? mp
->path
: NULL
);
354 fprintf(stderr
, Name
": stopped %s\n", devname
);
356 map_remove(&map
, devnum
);
362 int Manage_resize(char *devname
, int fd
, long long size
, int raid_disks
)
364 mdu_array_info_t info
;
365 if (ioctl(fd
, GET_ARRAY_INFO
, &info
) != 0) {
366 fprintf(stderr
, Name
": Cannot get array information for %s: %s\n",
367 devname
, strerror(errno
));
373 info
.raid_disks
= raid_disks
;
374 if (ioctl(fd
, SET_ARRAY_INFO
, &info
) != 0) {
375 fprintf(stderr
, Name
": Cannot set device size/shape for %s: %s\n",
376 devname
, strerror(errno
));
382 int Manage_subdevs(char *devname
, int fd
,
383 struct mddev_dev
*devlist
, int verbose
, int test
,
384 char *update
, int force
)
386 /* do something to each dev.
388 * 'a' - add the device
390 * If that fails EINVAL, try ADD_NEW_DISK
391 * 'r' - remove the device HOT_REMOVE_DISK
392 * device can be 'faulty' or 'detached' in which case all
393 * matching devices are removed.
394 * 'f' - set the device faulty SET_DISK_FAULTY
395 * device can be 'detached' in which case any device that
396 * is inaccessible will be marked faulty.
397 * For 'f' and 'r', the device can also be a kernel-internal
398 * name such as 'sdb'.
400 struct mddev_dev
*add_devlist
= NULL
;
401 mdu_array_info_t array
;
402 mdu_disk_info_t disc
;
403 unsigned long long array_size
;
404 struct mddev_dev
*dv
, *next
= NULL
;
408 struct supertype
*st
, *tst
;
409 char *subarray
= NULL
;
414 int count
= 0; /* number of actions taken */
416 if (ioctl(fd
, GET_ARRAY_INFO
, &array
)) {
417 fprintf(stderr
, Name
": cannot get array info for %s\n",
422 /* array.size is only 32 bit and may be truncated.
423 * So read from sysfs if possible, and record number of sectors
426 array_size
= get_component_size(fd
);
428 array_size
= array
.size
* 2;
430 tst
= super_by_fd(fd
, &subarray
);
432 fprintf(stderr
, Name
": unsupport array - version %d.%d\n",
433 array
.major_version
, array
.minor_version
);
438 for (dv
= devlist
, j
=0 ; dv
; dv
= next
, j
= jnext
) {
439 unsigned long long ldsize
;
441 char *dnprintable
= dv
->devname
;
442 char *add_dev
= dv
->devname
;
444 int re_add_failed
= 0;
449 if (strcmp(dv
->devname
, "failed")==0 ||
450 strcmp(dv
->devname
, "faulty")==0) {
451 int remaining_disks
= array
.nr_disks
;
452 if (dv
->disposition
!= 'r') {
453 fprintf(stderr
, Name
": %s only meaningful "
454 "with -r, not -%c\n",
455 dv
->devname
, dv
->disposition
);
458 for (; j
< 1024 && remaining_disks
> 0; j
++) {
461 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
463 if (disc
.major
== 0 && disc
.minor
== 0)
466 if ((disc
.state
& 1) == 0) /* faulty */
468 dev
= makedev(disc
.major
, disc
.minor
);
469 if (stb
.st_rdev
== dev
)
470 /* already did that one */
474 /* same slot again next time - things might
477 sprintf(dvname
,"%d:%d", disc
.major
, disc
.minor
);
478 dnprintable
= dvname
;
483 } else if (strcmp(dv
->devname
, "detached") == 0) {
484 int remaining_disks
= array
.nr_disks
;
485 if (dv
->disposition
!= 'r' && dv
->disposition
!= 'f') {
486 fprintf(stderr
, Name
": %s only meaningful "
487 "with -r of -f, not -%c\n",
488 dv
->devname
, dv
->disposition
);
491 for (; j
< 1024 && remaining_disks
> 0; j
++) {
495 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
497 if (disc
.major
== 0 && disc
.minor
== 0)
500 sprintf(dvname
,"%d:%d", disc
.major
, disc
.minor
);
501 sfd
= dev_open(dvname
, O_RDONLY
);
506 if (dv
->disposition
== 'f' &&
507 (disc
.state
& 1) == 1) /* already faulty */
511 dev
= makedev(disc
.major
, disc
.minor
);
512 if (stb
.st_rdev
== dev
)
513 /* already did that one */
517 /* same slot again next time - things might
520 dnprintable
= dvname
;
525 } else if (strcmp(dv
->devname
, "missing") == 0) {
526 if (dv
->disposition
!= 'a' || dv
->re_add
== 0) {
527 fprintf(stderr
, Name
": 'missing' only meaningful "
531 if (add_devlist
== NULL
)
532 add_devlist
= conf_get_devs();
533 if (add_devlist
== NULL
) {
534 fprintf(stderr
, Name
": no devices to scan for missing members.");
537 add_dev
= add_devlist
->devname
;
538 add_devlist
= add_devlist
->next
;
539 if (add_devlist
!= NULL
)
541 if (stat(add_dev
, &stb
) < 0)
543 } else if (strchr(dv
->devname
, '/') == NULL
&&
544 strchr(dv
->devname
, ':') == NULL
&&
545 strlen(dv
->devname
) < 50) {
546 /* Assume this is a kernel-internal name like 'sda1' */
549 if (dv
->disposition
!= 'r' && dv
->disposition
!= 'f') {
550 fprintf(stderr
, Name
": %s only meaningful "
551 "with -r or -f, not -%c\n",
552 dv
->devname
, dv
->disposition
);
556 sprintf(dname
, "dev-%s", dv
->devname
);
557 sysfd
= sysfs_open(fd2devnum(fd
), dname
, "block/dev");
561 if (sysfs_fd_get_str(sysfd
, dn
, 20) > 0 &&
562 sscanf(dn
, "%d:%d", &mj
,&mn
) == 2) {
563 stb
.st_rdev
= makedev(mj
,mn
);
570 sysfd
= sysfs_open(fd2devnum(fd
), dname
, "state");
572 fprintf(stderr
, Name
": %s does not appear "
573 "to be a component of %s\n",
574 dv
->devname
, devname
);
581 tfd
= dev_open(dv
->devname
, O_RDONLY
);
582 if (tfd
< 0 && dv
->disposition
== 'r' &&
583 lstat(dv
->devname
, &stb
) == 0)
584 /* Be happy, the lstat worked, that is
585 * enough for --remove
589 if (tfd
< 0 || fstat(tfd
, &stb
) != 0) {
590 fprintf(stderr
, Name
": cannot find %s: %s\n",
591 dv
->devname
, strerror(errno
));
599 if ((stb
.st_mode
& S_IFMT
) != S_IFBLK
) {
600 fprintf(stderr
, Name
": %s is not a "
606 switch(dv
->disposition
){
608 fprintf(stderr
, Name
": internal error - devmode[%s]=%d\n",
609 dv
->devname
, dv
->disposition
);
614 fprintf(stderr
, Name
": Cannot add disks to a"
615 " \'member\' array, perform this"
616 " operation on the parent container\n");
619 /* Make sure it isn't in use (in 2.6 or later) */
620 tfd
= dev_open(add_dev
, O_RDONLY
|O_EXCL
|O_DIRECT
);
621 if (tfd
< 0 && add_dev
!= dv
->devname
)
624 fprintf(stderr
, Name
": Cannot open %s: %s\n",
625 dv
->devname
, strerror(errno
));
631 if (array
.not_persistent
==0)
632 st
->ss
->load_super(st
, tfd
, NULL
);
634 if (add_dev
== dv
->devname
) {
635 if (!get_dev_size(tfd
, dv
->devname
, &ldsize
)) {
636 st
->ss
->free_super(st
);
640 } else if (!get_dev_size(tfd
, NULL
, &ldsize
)) {
641 st
->ss
->free_super(st
);
647 if (tst
->ss
->validate_geometry(
648 tst
, array
.level
, array
.layout
,
649 array
.raid_disks
, NULL
,
650 ldsize
>> 9, NULL
, NULL
, 0) == 0) {
653 ": %s is larger than %s can "
655 " Add --force is you "
656 "really wan to add this device.\n",
658 st
->ss
->free_super(st
);
663 ": %s is larger than %s can "
665 " Adding anyway as --force "
669 if (!tst
->ss
->external
&&
670 array
.major_version
== 0 &&
671 md_get_version(fd
)%100 < 2) {
673 st
->ss
->free_super(st
);
675 if (ioctl(fd
, HOT_ADD_DISK
,
676 (unsigned long)stb
.st_rdev
)==0) {
678 fprintf(stderr
, Name
": hot added %s\n",
683 fprintf(stderr
, Name
": hot add failed for %s: %s\n",
684 add_dev
, strerror(errno
));
688 if (array
.not_persistent
== 0 || tst
->ss
->external
) {
690 /* need to find a sample superblock to copy, and
691 * a spare slot to use.
692 * For 'external' array (well, container based),
693 * We can just load the metadata for the array.
696 /* already loaded */;
697 else if (tst
->ss
->external
) {
698 tst
->ss
->load_container(tst
, fd
, NULL
);
699 } else for (j
= 0; j
< tst
->max_devs
; j
++) {
703 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
705 if (disc
.major
==0 && disc
.minor
==0)
707 if ((disc
.state
& 4)==0) continue; /* sync */
708 /* Looks like a good device to try */
709 dev
= map_dev(disc
.major
, disc
.minor
, 1);
711 dfd
= dev_open(dev
, O_RDONLY
);
712 if (dfd
< 0) continue;
713 if (tst
->ss
->load_super(tst
, dfd
,
721 /* FIXME this is a bad test to be using */
724 st
->ss
->free_super(st
);
725 fprintf(stderr
, Name
": cannot load array metadata from %s\n", devname
);
729 /* Make sure device is large enough */
730 if (tst
->ss
->avail_size(tst
, ldsize
/512) <
734 st
->ss
->free_super(st
);
735 if (add_dev
!= dv
->devname
)
737 fprintf(stderr
, Name
": %s not large enough to join array\n",
742 /* Possibly this device was recently part of the array
743 * and was temporarily removed, and is now being re-added.
744 * If so, we can simply re-add it.
746 tst
->ss
->uuid_from_super(tst
, duuid
);
750 st
->ss
->getinfo_super(st
, &mdi
, NULL
);
751 st
->ss
->uuid_from_super(st
, ouuid
);
752 if ((mdi
.disk
.state
& (1<<MD_DISK_ACTIVE
)) &&
753 !(mdi
.disk
.state
& (1<<MD_DISK_FAULTY
)) &&
754 memcmp(duuid
, ouuid
, sizeof(ouuid
))==0) {
755 /* look like it is worth a try. Need to
756 * make sure kernel will accept it though.
758 /* re-add doesn't work for version-1 superblocks
761 if (array
.major_version
== 1 &&
762 get_linux_version() <= 2006018)
764 disc
.number
= mdi
.disk
.number
;
765 if (ioctl(fd
, GET_DISK_INFO
, &disc
) != 0
766 || disc
.major
!= 0 || disc
.minor
!= 0
769 disc
.major
= major(stb
.st_rdev
);
770 disc
.minor
= minor(stb
.st_rdev
);
771 disc
.number
= mdi
.disk
.number
;
772 disc
.raid_disk
= mdi
.disk
.raid_disk
;
773 disc
.state
= mdi
.disk
.state
;
774 if (dv
->writemostly
== 1)
775 disc
.state
|= 1 << MD_DISK_WRITEMOSTLY
;
776 if (dv
->writemostly
== 2)
777 disc
.state
&= ~(1 << MD_DISK_WRITEMOSTLY
);
778 remove_partitions(tfd
);
781 if (update
|| dv
->writemostly
> 0) {
783 tfd
= dev_open(dv
->devname
, O_RDWR
);
785 fprintf(stderr
, Name
": failed to open %s for"
786 " superblock update during re-add\n", dv
->devname
);
787 st
->ss
->free_super(st
);
791 if (dv
->writemostly
== 1)
792 rv
= st
->ss
->update_super(
793 st
, NULL
, "writemostly",
794 devname
, verbose
, 0, NULL
);
795 if (dv
->writemostly
== 2)
796 rv
= st
->ss
->update_super(
797 st
, NULL
, "readwrite",
798 devname
, verbose
, 0, NULL
);
800 rv
= st
->ss
->update_super(
802 devname
, verbose
, 0, NULL
);
804 rv
= st
->ss
->store_super(st
, tfd
);
808 fprintf(stderr
, Name
": failed to update"
809 " superblock during re-add\n");
810 st
->ss
->free_super(st
);
814 /* don't even try if disk is marked as faulty */
816 if (ioctl(fd
, ADD_NEW_DISK
, &disc
) == 0) {
818 fprintf(stderr
, Name
": re-added %s\n", add_dev
);
820 st
->ss
->free_super(st
);
823 if (errno
== ENOMEM
|| errno
== EROFS
) {
824 fprintf(stderr
, Name
": add new device failed for %s: %s\n",
825 add_dev
, strerror(errno
));
826 st
->ss
->free_super(st
);
827 if (add_dev
!= dv
->devname
)
834 st
->ss
->free_super(st
);
836 if (add_dev
!= dv
->devname
) {
839 ": --re-add for %s to %s is not possible\n",
851 ": --re-add for %s to %s is not possible\n",
852 dv
->devname
, devname
);
856 fprintf(stderr
, Name
": %s reports being an active member for %s, but a --re-add fails.\n",
857 dv
->devname
, devname
);
858 fprintf(stderr
, Name
": not performing --add as that would convert %s in to a spare.\n",
860 fprintf(stderr
, Name
": To make this a spare, use \"mdadm --zero-superblock %s\" first.\n",
867 /* non-persistent. Must ensure that new drive
868 * is at least array.size big.
870 if (ldsize
/512 < array_size
) {
871 fprintf(stderr
, Name
": %s not large enough to join array\n",
878 /* committed to really trying this device now*/
880 remove_partitions(tfd
);
884 /* in 2.6.17 and earlier, version-1 superblocks won't
885 * use the number we write, but will choose a free number.
886 * we must choose the same free number, which requires
887 * starting at 'raid_disks' and counting up
889 for (j
= array
.raid_disks
; j
< tst
->max_devs
; j
++) {
891 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
893 if (disc
.major
==0 && disc
.minor
==0)
895 if (disc
.state
& 8) /* removed */
898 disc
.major
= major(stb
.st_rdev
);
899 disc
.minor
= minor(stb
.st_rdev
);
902 if (array
.not_persistent
==0) {
904 if (dv
->writemostly
== 1)
905 disc
.state
|= 1 << MD_DISK_WRITEMOSTLY
;
906 dfd
= dev_open(dv
->devname
, O_RDWR
| O_EXCL
|O_DIRECT
);
907 if (tst
->ss
->add_to_super(tst
, &disc
, dfd
,
912 if (tst
->ss
->write_init_super(tst
)) {
916 } else if (dv
->re_add
) {
917 /* this had better be raid1.
918 * As we are "--re-add"ing we must find a spare slot
921 char *used
= malloc(array
.raid_disks
);
922 memset(used
, 0, array
.raid_disks
);
923 for (j
=0; j
< tst
->max_devs
; j
++) {
924 mdu_disk_info_t disc2
;
926 if (ioctl(fd
, GET_DISK_INFO
, &disc2
))
928 if (disc2
.major
==0 && disc2
.minor
==0)
930 if (disc2
.state
& 8) /* removed */
932 if (disc2
.raid_disk
< 0)
934 if (disc2
.raid_disk
> array
.raid_disks
)
936 used
[disc2
.raid_disk
] = 1;
938 for (j
=0 ; j
<array
.raid_disks
; j
++)
941 disc
.state
|= (1<<MD_DISK_SYNC
);
946 if (dv
->writemostly
== 1)
947 disc
.state
|= (1 << MD_DISK_WRITEMOSTLY
);
948 if (tst
->ss
->external
) {
950 * to an external metadata container */
951 struct mdinfo new_mdi
;
954 int devnum
= fd2devnum(fd
);
957 container_fd
= open_dev_excl(devnum
);
958 if (container_fd
< 0) {
959 fprintf(stderr
, Name
": add failed for %s:"
960 " could not get exclusive access to container\n",
962 tst
->ss
->free_super(tst
);
966 dfd
= dev_open(dv
->devname
, O_RDWR
| O_EXCL
|O_DIRECT
);
967 if (mdmon_running(tst
->container_dev
))
968 tst
->update_tail
= &tst
->updates
;
969 if (tst
->ss
->add_to_super(tst
, &disc
, dfd
,
975 if (tst
->update_tail
)
976 flush_metadata_updates(tst
);
978 tst
->ss
->sync_metadata(tst
);
980 sra
= sysfs_read(container_fd
, -1, 0);
982 fprintf(stderr
, Name
": add failed for %s: sysfs_read failed\n",
985 tst
->ss
->free_super(tst
);
988 sra
->array
.level
= LEVEL_CONTAINER
;
989 /* Need to set data_offset and component_size */
990 tst
->ss
->getinfo_super(tst
, &new_mdi
, NULL
);
991 new_mdi
.disk
.major
= disc
.major
;
992 new_mdi
.disk
.minor
= disc
.minor
;
993 new_mdi
.recovery_start
= 0;
994 /* Make sure fds are closed as they are O_EXCL which
995 * would block add_disk */
996 tst
->ss
->free_super(tst
);
997 if (sysfs_add_disk(sra
, &new_mdi
, 0) != 0) {
998 fprintf(stderr
, Name
": add new device to external metadata"
999 " failed for %s\n", dv
->devname
);
1000 close(container_fd
);
1004 ping_monitor_by_id(devnum
);
1006 close(container_fd
);
1008 tst
->ss
->free_super(tst
);
1009 if (ioctl(fd
, ADD_NEW_DISK
, &disc
)) {
1010 fprintf(stderr
, Name
": add new device failed for %s as %d: %s\n",
1011 dv
->devname
, j
, strerror(errno
));
1016 fprintf(stderr
, Name
": added %s\n", dv
->devname
);
1022 fprintf(stderr
, Name
": Cannot remove disks from a"
1023 " \'member\' array, perform this"
1024 " operation on the parent container\n");
1029 if (tst
->ss
->external
) {
1030 /* To remove a device from a container, we must
1031 * check that it isn't in use in an array.
1032 * This involves looking in the 'holders'
1033 * directory - there must be just one entry,
1035 * To ensure that it doesn't get used as a
1036 * hold spare while we are checking, we
1037 * get an O_EXCL open on the container
1039 int dnum
= fd2devnum(fd
);
1040 lfd
= open_dev_excl(dnum
);
1042 fprintf(stderr
, Name
1043 ": Cannot get exclusive access "
1044 " to container - odd\n");
1049 /* in the detached case it is not possible to
1050 * check if we are the unique holder, so just
1051 * rely on the 'detached' checks
1053 if (strcmp(dv
->devname
, "detached") == 0 ||
1055 sysfs_unique_holder(dnum
, stb
.st_rdev
))
1058 fprintf(stderr
, Name
1059 ": %s is %s, cannot remove.\n",
1061 errno
== EEXIST
? "still in use":
1067 /* FIXME check that it is a current member */
1069 /* device has been removed and we don't know
1070 * the major:minor number
1072 int n
= write(sysfd
, "remove", 6);
1080 err
= ioctl(fd
, HOT_REMOVE_DISK
, (unsigned long)stb
.st_rdev
);
1081 if (err
&& errno
== ENODEV
) {
1082 /* Old kernels rejected this if no personality
1084 struct mdinfo
*sra
= sysfs_read(fd
, 0, GET_DEVS
);
1085 struct mdinfo
*dv
= NULL
;
1088 for ( ; dv
; dv
=dv
->next
)
1089 if (dv
->disk
.major
== (int)major(stb
.st_rdev
) &&
1090 dv
->disk
.minor
== (int)minor(stb
.st_rdev
))
1093 err
= sysfs_set_str(sra
, dv
,
1102 fprintf(stderr
, Name
": hot remove failed "
1103 "for %s: %s\n", dnprintable
,
1109 if (tst
->ss
->external
) {
1111 * Before dropping our exclusive open we make an
1112 * attempt at preventing mdmon from seeing an
1113 * 'add' event before reconciling this 'remove'
1116 char *name
= devnum2devname(fd2devnum(fd
));
1119 fprintf(stderr
, Name
": unable to get container name\n");
1130 fprintf(stderr
, Name
": hot removed %s from %s\n",
1131 dnprintable
, devname
);
1134 case 'f': /* set faulty */
1135 /* FIXME check current member */
1136 if ((sysfd
>= 0 && write(sysfd
, "faulty", 6) != 6) ||
1137 (sysfd
< 0 && ioctl(fd
, SET_DISK_FAULTY
,
1138 (unsigned long) stb
.st_rdev
))) {
1139 fprintf(stderr
, Name
": set device faulty failed for %s: %s\n",
1140 dnprintable
, strerror(errno
));
1150 fprintf(stderr
, Name
": set %s faulty in %s\n",
1151 dnprintable
, devname
);
1155 if (test
&& count
== 0)
1160 int autodetect(void)
1162 /* Open any md device, and issue the RAID_AUTORUN ioctl */
1164 int fd
= dev_open("9:0", O_RDONLY
);
1166 if (ioctl(fd
, RAID_AUTORUN
, 0) == 0)
1173 int Update_subarray(char *dev
, char *subarray
, char *update
, struct mddev_ident
*ident
, int quiet
)
1175 struct supertype supertype
, *st
= &supertype
;
1178 memset(st
, 0, sizeof(*st
));
1180 fd
= open_subarray(dev
, subarray
, st
, quiet
);
1184 if (!st
->ss
->update_subarray
) {
1187 Name
": Operation not supported for %s metadata\n",
1192 if (mdmon_running(st
->devnum
))
1193 st
->update_tail
= &st
->updates
;
1195 rv
= st
->ss
->update_subarray(st
, subarray
, update
, ident
);
1199 fprintf(stderr
, Name
": Failed to update %s of subarray-%s in %s\n",
1200 update
, subarray
, dev
);
1201 } else if (st
->update_tail
)
1202 flush_metadata_updates(st
);
1204 st
->ss
->sync_metadata(st
);
1206 if (rv
== 0 && strcmp(update
, "name") == 0 && !quiet
)
1208 Name
": Updated subarray-%s name from %s, UUIDs may have changed\n",
1212 st
->ss
->free_super(st
);
1218 /* Move spare from one array to another
1219 * If adding to destination array fails
1220 * add back to original array
1221 * Returns 1 on success, 0 on failure */
1222 int move_spare(char *from_devname
, char *to_devname
, dev_t devid
)
1224 struct mddev_dev devlist
;
1227 /* try to remove and add */
1228 int fd1
= open(to_devname
, O_RDONLY
);
1229 int fd2
= open(from_devname
, O_RDONLY
);
1231 if (fd1
< 0 || fd2
< 0) {
1232 if (fd1
>=0) close(fd1
);
1233 if (fd2
>=0) close(fd2
);
1237 devlist
.next
= NULL
;
1240 devlist
.writemostly
= 0;
1241 devlist
.devname
= devname
;
1242 sprintf(devname
, "%d:%d", major(devid
), minor(devid
));
1244 devlist
.disposition
= 'r';
1245 if (Manage_subdevs(from_devname
, fd2
, &devlist
, -1, 0, NULL
, 0) == 0) {
1246 devlist
.disposition
= 'a';
1247 if (Manage_subdevs(to_devname
, fd1
, &devlist
, -1, 0, NULL
, 0) == 0) {
1248 /* make sure manager is aware of changes */
1249 ping_manager(to_devname
);
1250 ping_manager(from_devname
);
1255 else Manage_subdevs(from_devname
, fd2
, &devlist
, -1, 0, NULL
, 0);