]>
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 */
188 if (runstop
== -1 && md_get_version(fd
) < 9000) {
189 if (ioctl(fd
, STOP_MD
, 0)) {
190 if (quiet
== 0) fprintf(stderr
,
191 Name
": stopping device %s "
193 devname
, strerror(errno
));
198 if (md_get_version(fd
) < 9000) {
199 fprintf(stderr
, Name
": need md driver version 0.90.0 or later\n");
203 if (ioctl(fd, GET_ARRAY_INFO, &array)) {
204 fprintf(stderr, Name ": %s does not appear to be active.\n",
210 if (ioctl(fd
, RUN_ARRAY
, ¶m
)) {
211 fprintf(stderr
, Name
": failed to run array %s: %s\n",
212 devname
, strerror(errno
));
216 fprintf(stderr
, Name
": started %s\n", devname
);
217 } else if (runstop
< 0){
218 struct map_ent
*map
= NULL
;
224 /* If this is an mdmon managed array, just write 'inactive'
225 * to the array state and let mdmon clear up.
227 devnum
= fd2devnum(fd
);
228 /* Get EXCL access first. If this fails, then attempting
229 * to stop is probably a bad idea.
232 fd
= open(devname
, O_RDONLY
|O_EXCL
);
233 if (fd
< 0 || fd2devnum(fd
) != devnum
) {
237 Name
": Cannot get exclusive access to %s:"
239 "process, mounted filesystem "
240 "or active volume group?\n",
244 mdi
= sysfs_read(fd
, -1, GET_LEVEL
|GET_VERSION
);
246 mdi
->array
.level
> 0 &&
247 is_subarray(mdi
->text_version
)) {
249 /* This is mdmon managed. */
254 (err
= sysfs_set_str(mdi
, NULL
,
263 ": failed to stop array %s: %s\n",
264 devname
, strerror(errno
));
269 /* Give monitor a chance to act */
270 ping_monitor(mdi
->text_version
);
272 fd
= open_dev_excl(devnum
);
275 ": failed to completely stop %s"
276 ": Device is busy\n",
282 mdi
->array
.major_version
== -1 &&
283 mdi
->array
.minor_version
== -2 &&
284 !is_subarray(mdi
->text_version
)) {
285 struct mdstat_ent
*mds
, *m
;
286 /* container, possibly mdmon-managed.
287 * Make sure mdmon isn't opening it, which
288 * would interfere with the 'stop'
290 ping_monitor(mdi
->sys_name
);
292 /* now check that there are no existing arrays
293 * which are members of this array
295 mds
= mdstat_read(0, 0);
296 for (m
=mds
; m
; m
=m
->next
)
297 if (m
->metadata_version
&&
298 strncmp(m
->metadata_version
, "external:", 9)==0 &&
299 is_subarray(m
->metadata_version
+9) &&
300 devname2devnum(m
->metadata_version
+10) == devnum
) {
303 ": Cannot stop container %s: "
304 "member %s still active\n",
312 /* As we have an O_EXCL open, any use of the device
313 * which blocks STOP_ARRAY is probably a transient use,
314 * so it is reasonable to retry for a while - 5 seconds.
317 while (count
&& fd
>= 0
318 && (err
= ioctl(fd
, STOP_ARRAY
, NULL
)) < 0
323 if (fd
>= 0 && err
) {
326 ": failed to stop array %s: %s\n",
327 devname
, strerror(errno
));
329 fprintf(stderr
, "Perhaps a running "
330 "process, mounted filesystem "
331 "or active volume group?\n");
336 /* prior to 2.6.28, KOBJ_CHANGE was not sent when an md array
337 * was stopped, so We'll do it here just to be sure. Drop any
338 * partitions as well...
341 ioctl(fd
, BLKRRPART
, 0);
343 sysfs_uevent(mdi
, "change");
346 if (devnum
!= NoMdDev
&&
347 (stat("/dev/.udev", &stb
) != 0 ||
348 check_env("MDADM_NO_UDEV"))) {
349 struct map_ent
*mp
= map_by_devnum(&map
, devnum
);
350 remove_devices(devnum
, mp
? mp
->path
: NULL
);
355 fprintf(stderr
, Name
": stopped %s\n", devname
);
357 map_remove(&map
, devnum
);
366 int Manage_resize(char *devname
, int fd
, long long size
, int raid_disks
)
368 mdu_array_info_t info
;
369 if (ioctl(fd
, GET_ARRAY_INFO
, &info
) != 0) {
370 fprintf(stderr
, Name
": Cannot get array information for %s: %s\n",
371 devname
, strerror(errno
));
377 info
.raid_disks
= raid_disks
;
378 if (ioctl(fd
, SET_ARRAY_INFO
, &info
) != 0) {
379 fprintf(stderr
, Name
": Cannot set device size/shape for %s: %s\n",
380 devname
, strerror(errno
));
386 int Manage_subdevs(char *devname
, int fd
,
387 struct mddev_dev
*devlist
, int verbose
, int test
,
388 char *update
, int force
)
390 /* do something to each dev.
392 * 'a' - add the device
394 * If that fails EINVAL, try ADD_NEW_DISK
395 * 'r' - remove the device HOT_REMOVE_DISK
396 * device can be 'faulty' or 'detached' in which case all
397 * matching devices are removed.
398 * 'f' - set the device faulty SET_DISK_FAULTY
399 * device can be 'detached' in which case any device that
400 * is inaccessible will be marked faulty.
401 * For 'f' and 'r', the device can also be a kernel-internal
402 * name such as 'sdb'.
404 struct mddev_dev
*add_devlist
= NULL
;
405 mdu_array_info_t array
;
406 mdu_disk_info_t disc
;
407 unsigned long long array_size
;
408 struct mddev_dev
*dv
, *next
= NULL
;
412 struct supertype
*st
, *tst
;
413 char *subarray
= NULL
;
418 int count
= 0; /* number of actions taken */
420 if (ioctl(fd
, GET_ARRAY_INFO
, &array
)) {
421 fprintf(stderr
, Name
": cannot get array info for %s\n",
426 /* array.size is only 32 bit and may be truncated.
427 * So read from sysfs if possible, and record number of sectors
430 array_size
= get_component_size(fd
);
432 array_size
= array
.size
* 2;
434 tst
= super_by_fd(fd
, &subarray
);
436 fprintf(stderr
, Name
": unsupport array - version %d.%d\n",
437 array
.major_version
, array
.minor_version
);
442 for (dv
= devlist
, j
=0 ; dv
; dv
= next
, j
= jnext
) {
443 unsigned long long ldsize
;
445 char *dnprintable
= dv
->devname
;
446 char *add_dev
= dv
->devname
;
448 int re_add_failed
= 0;
453 if (strcmp(dv
->devname
, "failed")==0 ||
454 strcmp(dv
->devname
, "faulty")==0) {
455 int remaining_disks
= array
.nr_disks
;
456 if (dv
->disposition
!= 'r') {
457 fprintf(stderr
, Name
": %s only meaningful "
458 "with -r, not -%c\n",
459 dv
->devname
, dv
->disposition
);
462 for (; j
< 1024 && remaining_disks
> 0; j
++) {
465 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
467 if (disc
.major
== 0 && disc
.minor
== 0)
470 if ((disc
.state
& 1) == 0) /* faulty */
472 dev
= makedev(disc
.major
, disc
.minor
);
473 if (stb
.st_rdev
== dev
)
474 /* already did that one */
478 /* same slot again next time - things might
481 sprintf(dvname
,"%d:%d", disc
.major
, disc
.minor
);
482 dnprintable
= dvname
;
487 } else if (strcmp(dv
->devname
, "detached") == 0) {
488 int remaining_disks
= array
.nr_disks
;
489 if (dv
->disposition
!= 'r' && dv
->disposition
!= 'f') {
490 fprintf(stderr
, Name
": %s only meaningful "
491 "with -r of -f, not -%c\n",
492 dv
->devname
, dv
->disposition
);
495 for (; j
< 1024 && remaining_disks
> 0; j
++) {
499 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
501 if (disc
.major
== 0 && disc
.minor
== 0)
504 sprintf(dvname
,"%d:%d", disc
.major
, disc
.minor
);
505 sfd
= dev_open(dvname
, O_RDONLY
);
510 if (dv
->disposition
== 'f' &&
511 (disc
.state
& 1) == 1) /* already faulty */
515 dev
= makedev(disc
.major
, disc
.minor
);
516 if (stb
.st_rdev
== dev
)
517 /* already did that one */
521 /* same slot again next time - things might
524 dnprintable
= dvname
;
529 } else if (strcmp(dv
->devname
, "missing") == 0) {
530 if (dv
->disposition
!= 'a' || dv
->re_add
== 0) {
531 fprintf(stderr
, Name
": 'missing' only meaningful "
535 if (add_devlist
== NULL
)
536 add_devlist
= conf_get_devs();
537 if (add_devlist
== NULL
) {
538 fprintf(stderr
, Name
": no devices to scan for missing members.");
541 add_dev
= add_devlist
->devname
;
542 add_devlist
= add_devlist
->next
;
543 if (add_devlist
!= NULL
)
545 if (stat(add_dev
, &stb
) < 0)
547 } else if (strchr(dv
->devname
, '/') == NULL
&&
548 strchr(dv
->devname
, ':') == NULL
&&
549 strlen(dv
->devname
) < 50) {
550 /* Assume this is a kernel-internal name like 'sda1' */
553 if (dv
->disposition
!= 'r' && dv
->disposition
!= 'f') {
554 fprintf(stderr
, Name
": %s only meaningful "
555 "with -r or -f, not -%c\n",
556 dv
->devname
, dv
->disposition
);
560 sprintf(dname
, "dev-%s", dv
->devname
);
561 sysfd
= sysfs_open(fd2devnum(fd
), dname
, "block/dev");
565 if (sysfs_fd_get_str(sysfd
, dn
, 20) > 0 &&
566 sscanf(dn
, "%d:%d", &mj
,&mn
) == 2) {
567 stb
.st_rdev
= makedev(mj
,mn
);
574 sysfd
= sysfs_open(fd2devnum(fd
), dname
, "state");
576 fprintf(stderr
, Name
": %s does not appear "
577 "to be a component of %s\n",
578 dv
->devname
, devname
);
585 tfd
= dev_open(dv
->devname
, O_RDONLY
);
586 if (tfd
< 0 && dv
->disposition
== 'r' &&
587 lstat(dv
->devname
, &stb
) == 0)
588 /* Be happy, the lstat worked, that is
589 * enough for --remove
593 if (tfd
< 0 || fstat(tfd
, &stb
) != 0) {
594 fprintf(stderr
, Name
": cannot find %s: %s\n",
595 dv
->devname
, strerror(errno
));
603 if ((stb
.st_mode
& S_IFMT
) != S_IFBLK
) {
604 fprintf(stderr
, Name
": %s is not a "
610 switch(dv
->disposition
){
612 fprintf(stderr
, Name
": internal error - devmode[%s]=%d\n",
613 dv
->devname
, dv
->disposition
);
618 fprintf(stderr
, Name
": Cannot add disks to a"
619 " \'member\' array, perform this"
620 " operation on the parent container\n");
623 /* Make sure it isn't in use (in 2.6 or later) */
624 tfd
= dev_open(add_dev
, O_RDONLY
|O_EXCL
|O_DIRECT
);
625 if (tfd
< 0 && add_dev
!= dv
->devname
)
628 fprintf(stderr
, Name
": Cannot open %s: %s\n",
629 dv
->devname
, strerror(errno
));
635 if (array
.not_persistent
==0)
636 st
->ss
->load_super(st
, tfd
, NULL
);
638 if (add_dev
== dv
->devname
) {
639 if (!get_dev_size(tfd
, dv
->devname
, &ldsize
)) {
640 st
->ss
->free_super(st
);
644 } else if (!get_dev_size(tfd
, NULL
, &ldsize
)) {
645 st
->ss
->free_super(st
);
651 if (tst
->ss
->validate_geometry(
652 tst
, array
.level
, array
.layout
,
653 array
.raid_disks
, NULL
,
654 ldsize
>> 9, NULL
, NULL
, 0) == 0) {
657 ": %s is larger than %s can "
659 " Add --force is you "
660 "really wan to add this device.\n",
662 st
->ss
->free_super(st
);
667 ": %s is larger than %s can "
669 " Adding anyway as --force "
673 if (!tst
->ss
->external
&&
674 array
.major_version
== 0 &&
675 md_get_version(fd
)%100 < 2) {
677 st
->ss
->free_super(st
);
679 if (ioctl(fd
, HOT_ADD_DISK
,
680 (unsigned long)stb
.st_rdev
)==0) {
682 fprintf(stderr
, Name
": hot added %s\n",
687 fprintf(stderr
, Name
": hot add failed for %s: %s\n",
688 add_dev
, strerror(errno
));
692 if (array
.not_persistent
== 0 || tst
->ss
->external
) {
694 /* need to find a sample superblock to copy, and
695 * a spare slot to use.
696 * For 'external' array (well, container based),
697 * We can just load the metadata for the array.
700 /* already loaded */;
701 else if (tst
->ss
->external
) {
702 tst
->ss
->load_container(tst
, fd
, NULL
);
703 } else for (j
= 0; j
< tst
->max_devs
; j
++) {
707 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
709 if (disc
.major
==0 && disc
.minor
==0)
711 if ((disc
.state
& 4)==0) continue; /* sync */
712 /* Looks like a good device to try */
713 dev
= map_dev(disc
.major
, disc
.minor
, 1);
715 dfd
= dev_open(dev
, O_RDONLY
);
716 if (dfd
< 0) continue;
717 if (tst
->ss
->load_super(tst
, dfd
,
725 /* FIXME this is a bad test to be using */
728 st
->ss
->free_super(st
);
729 fprintf(stderr
, Name
": cannot load array metadata from %s\n", devname
);
733 /* Make sure device is large enough */
734 if (tst
->ss
->avail_size(tst
, ldsize
/512) <
738 st
->ss
->free_super(st
);
739 if (add_dev
!= dv
->devname
)
741 fprintf(stderr
, Name
": %s not large enough to join array\n",
746 /* Possibly this device was recently part of the array
747 * and was temporarily removed, and is now being re-added.
748 * If so, we can simply re-add it.
750 tst
->ss
->uuid_from_super(tst
, duuid
);
754 st
->ss
->getinfo_super(st
, &mdi
, NULL
);
755 st
->ss
->uuid_from_super(st
, ouuid
);
756 if ((mdi
.disk
.state
& (1<<MD_DISK_ACTIVE
)) &&
757 !(mdi
.disk
.state
& (1<<MD_DISK_FAULTY
)) &&
758 memcmp(duuid
, ouuid
, sizeof(ouuid
))==0) {
759 /* look like it is worth a try. Need to
760 * make sure kernel will accept it though.
762 /* re-add doesn't work for version-1 superblocks
765 if (array
.major_version
== 1 &&
766 get_linux_version() <= 2006018)
768 disc
.number
= mdi
.disk
.number
;
769 if (ioctl(fd
, GET_DISK_INFO
, &disc
) != 0
770 || disc
.major
!= 0 || disc
.minor
!= 0
773 disc
.major
= major(stb
.st_rdev
);
774 disc
.minor
= minor(stb
.st_rdev
);
775 disc
.number
= mdi
.disk
.number
;
776 disc
.raid_disk
= mdi
.disk
.raid_disk
;
777 disc
.state
= mdi
.disk
.state
;
778 if (dv
->writemostly
== 1)
779 disc
.state
|= 1 << MD_DISK_WRITEMOSTLY
;
780 if (dv
->writemostly
== 2)
781 disc
.state
&= ~(1 << MD_DISK_WRITEMOSTLY
);
782 remove_partitions(tfd
);
785 if (update
|| dv
->writemostly
> 0) {
787 tfd
= dev_open(dv
->devname
, O_RDWR
);
789 fprintf(stderr
, Name
": failed to open %s for"
790 " superblock update during re-add\n", dv
->devname
);
791 st
->ss
->free_super(st
);
795 if (dv
->writemostly
== 1)
796 rv
= st
->ss
->update_super(
797 st
, NULL
, "writemostly",
798 devname
, verbose
, 0, NULL
);
799 if (dv
->writemostly
== 2)
800 rv
= st
->ss
->update_super(
801 st
, NULL
, "readwrite",
802 devname
, verbose
, 0, NULL
);
804 rv
= st
->ss
->update_super(
806 devname
, verbose
, 0, NULL
);
808 rv
= st
->ss
->store_super(st
, tfd
);
812 fprintf(stderr
, Name
": failed to update"
813 " superblock during re-add\n");
814 st
->ss
->free_super(st
);
818 /* don't even try if disk is marked as faulty */
820 if (ioctl(fd
, ADD_NEW_DISK
, &disc
) == 0) {
822 fprintf(stderr
, Name
": re-added %s\n", add_dev
);
824 st
->ss
->free_super(st
);
827 if (errno
== ENOMEM
|| errno
== EROFS
) {
828 fprintf(stderr
, Name
": add new device failed for %s: %s\n",
829 add_dev
, strerror(errno
));
830 st
->ss
->free_super(st
);
831 if (add_dev
!= dv
->devname
)
838 st
->ss
->free_super(st
);
840 if (add_dev
!= dv
->devname
) {
843 ": --re-add for %s to %s is not possible\n",
855 ": --re-add for %s to %s is not possible\n",
856 dv
->devname
, devname
);
860 fprintf(stderr
, Name
": %s reports being an active member for %s, but a --re-add fails.\n",
861 dv
->devname
, devname
);
862 fprintf(stderr
, Name
": not performing --add as that would convert %s in to a spare.\n",
864 fprintf(stderr
, Name
": To make this a spare, use \"mdadm --zero-superblock %s\" first.\n",
871 /* non-persistent. Must ensure that new drive
872 * is at least array.size big.
874 if (ldsize
/512 < array_size
) {
875 fprintf(stderr
, Name
": %s not large enough to join array\n",
882 /* committed to really trying this device now*/
884 remove_partitions(tfd
);
888 /* in 2.6.17 and earlier, version-1 superblocks won't
889 * use the number we write, but will choose a free number.
890 * we must choose the same free number, which requires
891 * starting at 'raid_disks' and counting up
893 for (j
= array
.raid_disks
; j
< tst
->max_devs
; j
++) {
895 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
897 if (disc
.major
==0 && disc
.minor
==0)
899 if (disc
.state
& 8) /* removed */
902 disc
.major
= major(stb
.st_rdev
);
903 disc
.minor
= minor(stb
.st_rdev
);
906 if (array
.not_persistent
==0) {
908 if (dv
->writemostly
== 1)
909 disc
.state
|= 1 << MD_DISK_WRITEMOSTLY
;
910 dfd
= dev_open(dv
->devname
, O_RDWR
| O_EXCL
|O_DIRECT
);
911 if (tst
->ss
->add_to_super(tst
, &disc
, dfd
,
916 if (tst
->ss
->write_init_super(tst
)) {
920 } else if (dv
->re_add
) {
921 /* this had better be raid1.
922 * As we are "--re-add"ing we must find a spare slot
925 char *used
= malloc(array
.raid_disks
);
926 memset(used
, 0, array
.raid_disks
);
927 for (j
=0; j
< tst
->max_devs
; j
++) {
928 mdu_disk_info_t disc2
;
930 if (ioctl(fd
, GET_DISK_INFO
, &disc2
))
932 if (disc2
.major
==0 && disc2
.minor
==0)
934 if (disc2
.state
& 8) /* removed */
936 if (disc2
.raid_disk
< 0)
938 if (disc2
.raid_disk
> array
.raid_disks
)
940 used
[disc2
.raid_disk
] = 1;
942 for (j
=0 ; j
<array
.raid_disks
; j
++)
945 disc
.state
|= (1<<MD_DISK_SYNC
);
950 if (dv
->writemostly
== 1)
951 disc
.state
|= (1 << MD_DISK_WRITEMOSTLY
);
952 if (tst
->ss
->external
) {
954 * to an external metadata container */
955 struct mdinfo new_mdi
;
958 int devnum
= fd2devnum(fd
);
961 container_fd
= open_dev_excl(devnum
);
962 if (container_fd
< 0) {
963 fprintf(stderr
, Name
": add failed for %s:"
964 " could not get exclusive access to container\n",
966 tst
->ss
->free_super(tst
);
970 dfd
= dev_open(dv
->devname
, O_RDWR
| O_EXCL
|O_DIRECT
);
971 if (mdmon_running(tst
->container_dev
))
972 tst
->update_tail
= &tst
->updates
;
973 if (tst
->ss
->add_to_super(tst
, &disc
, dfd
,
979 if (tst
->update_tail
)
980 flush_metadata_updates(tst
);
982 tst
->ss
->sync_metadata(tst
);
984 sra
= sysfs_read(container_fd
, -1, 0);
986 fprintf(stderr
, Name
": add failed for %s: sysfs_read failed\n",
989 tst
->ss
->free_super(tst
);
992 sra
->array
.level
= LEVEL_CONTAINER
;
993 /* Need to set data_offset and component_size */
994 tst
->ss
->getinfo_super(tst
, &new_mdi
, NULL
);
995 new_mdi
.disk
.major
= disc
.major
;
996 new_mdi
.disk
.minor
= disc
.minor
;
997 new_mdi
.recovery_start
= 0;
998 /* Make sure fds are closed as they are O_EXCL which
999 * would block add_disk */
1000 tst
->ss
->free_super(tst
);
1001 if (sysfs_add_disk(sra
, &new_mdi
, 0) != 0) {
1002 fprintf(stderr
, Name
": add new device to external metadata"
1003 " failed for %s\n", dv
->devname
);
1004 close(container_fd
);
1008 ping_monitor_by_id(devnum
);
1010 close(container_fd
);
1012 tst
->ss
->free_super(tst
);
1013 if (ioctl(fd
, ADD_NEW_DISK
, &disc
)) {
1014 fprintf(stderr
, Name
": add new device failed for %s as %d: %s\n",
1015 dv
->devname
, j
, strerror(errno
));
1020 fprintf(stderr
, Name
": added %s\n", dv
->devname
);
1026 fprintf(stderr
, Name
": Cannot remove disks from a"
1027 " \'member\' array, perform this"
1028 " operation on the parent container\n");
1033 if (tst
->ss
->external
) {
1034 /* To remove a device from a container, we must
1035 * check that it isn't in use in an array.
1036 * This involves looking in the 'holders'
1037 * directory - there must be just one entry,
1039 * To ensure that it doesn't get used as a
1040 * hold spare while we are checking, we
1041 * get an O_EXCL open on the container
1043 int dnum
= fd2devnum(fd
);
1044 lfd
= open_dev_excl(dnum
);
1046 fprintf(stderr
, Name
1047 ": Cannot get exclusive access "
1048 " to container - odd\n");
1053 /* in the detached case it is not possible to
1054 * check if we are the unique holder, so just
1055 * rely on the 'detached' checks
1057 if (strcmp(dv
->devname
, "detached") == 0 ||
1059 sysfs_unique_holder(dnum
, stb
.st_rdev
))
1062 fprintf(stderr
, Name
1063 ": %s is %s, cannot remove.\n",
1065 errno
== EEXIST
? "still in use":
1071 /* FIXME check that it is a current member */
1073 /* device has been removed and we don't know
1074 * the major:minor number
1076 int n
= write(sysfd
, "remove", 6);
1084 err
= ioctl(fd
, HOT_REMOVE_DISK
, (unsigned long)stb
.st_rdev
);
1085 if (err
&& errno
== ENODEV
) {
1086 /* Old kernels rejected this if no personality
1088 struct mdinfo
*sra
= sysfs_read(fd
, 0, GET_DEVS
);
1089 struct mdinfo
*dv
= NULL
;
1092 for ( ; dv
; dv
=dv
->next
)
1093 if (dv
->disk
.major
== (int)major(stb
.st_rdev
) &&
1094 dv
->disk
.minor
== (int)minor(stb
.st_rdev
))
1097 err
= sysfs_set_str(sra
, dv
,
1106 fprintf(stderr
, Name
": hot remove failed "
1107 "for %s: %s\n", dnprintable
,
1113 if (tst
->ss
->external
) {
1115 * Before dropping our exclusive open we make an
1116 * attempt at preventing mdmon from seeing an
1117 * 'add' event before reconciling this 'remove'
1120 char *name
= devnum2devname(fd2devnum(fd
));
1123 fprintf(stderr
, Name
": unable to get container name\n");
1134 fprintf(stderr
, Name
": hot removed %s from %s\n",
1135 dnprintable
, devname
);
1138 case 'f': /* set faulty */
1139 /* FIXME check current member */
1140 if ((sysfd
>= 0 && write(sysfd
, "faulty", 6) != 6) ||
1141 (sysfd
< 0 && ioctl(fd
, SET_DISK_FAULTY
,
1142 (unsigned long) stb
.st_rdev
))) {
1143 fprintf(stderr
, Name
": set device faulty failed for %s: %s\n",
1144 dnprintable
, strerror(errno
));
1154 fprintf(stderr
, Name
": set %s faulty in %s\n",
1155 dnprintable
, devname
);
1159 if (test
&& count
== 0)
1164 int autodetect(void)
1166 /* Open any md device, and issue the RAID_AUTORUN ioctl */
1168 int fd
= dev_open("9:0", O_RDONLY
);
1170 if (ioctl(fd
, RAID_AUTORUN
, 0) == 0)
1177 int Update_subarray(char *dev
, char *subarray
, char *update
, struct mddev_ident
*ident
, int quiet
)
1179 struct supertype supertype
, *st
= &supertype
;
1182 memset(st
, 0, sizeof(*st
));
1184 fd
= open_subarray(dev
, subarray
, st
, quiet
);
1188 if (!st
->ss
->update_subarray
) {
1191 Name
": Operation not supported for %s metadata\n",
1196 if (mdmon_running(st
->devnum
))
1197 st
->update_tail
= &st
->updates
;
1199 rv
= st
->ss
->update_subarray(st
, subarray
, update
, ident
);
1203 fprintf(stderr
, Name
": Failed to update %s of subarray-%s in %s\n",
1204 update
, subarray
, dev
);
1205 } else if (st
->update_tail
)
1206 flush_metadata_updates(st
);
1208 st
->ss
->sync_metadata(st
);
1210 if (rv
== 0 && strcmp(update
, "name") == 0 && !quiet
)
1212 Name
": Updated subarray-%s name from %s, UUIDs may have changed\n",
1216 st
->ss
->free_super(st
);
1222 /* Move spare from one array to another
1223 * If adding to destination array fails
1224 * add back to original array
1225 * Returns 1 on success, 0 on failure */
1226 int move_spare(char *from_devname
, char *to_devname
, dev_t devid
)
1228 struct mddev_dev devlist
;
1231 /* try to remove and add */
1232 int fd1
= open(to_devname
, O_RDONLY
);
1233 int fd2
= open(from_devname
, O_RDONLY
);
1235 if (fd1
< 0 || fd2
< 0) {
1236 if (fd1
>=0) close(fd1
);
1237 if (fd2
>=0) close(fd2
);
1241 devlist
.next
= NULL
;
1244 devlist
.writemostly
= 0;
1245 devlist
.devname
= devname
;
1246 sprintf(devname
, "%d:%d", major(devid
), minor(devid
));
1248 devlist
.disposition
= 'r';
1249 if (Manage_subdevs(from_devname
, fd2
, &devlist
, -1, 0, NULL
, 0) == 0) {
1250 devlist
.disposition
= 'a';
1251 if (Manage_subdevs(to_devname
, fd1
, &devlist
, -1, 0, NULL
, 0) == 0) {
1252 /* make sure manager is aware of changes */
1253 ping_manager(to_devname
);
1254 ping_manager(from_devname
);
1259 else Manage_subdevs(from_devname
, fd2
, &devlist
, -1, 0, NULL
, 0);