]>
git.ipfire.org Git - thirdparty/mdadm.git/blob - Manage.c
2 * mdadm - manage Linux "md" devices aka RAID arrays.
4 * Copyright (C) 2001-2012 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 pr_err("need md driver version 0.90.0 or later\n");
54 /* If this is an externally-managed array, we need to modify the
55 * metadata_version so that mdmon doesn't undo our change.
57 mdi
= sysfs_read(fd
, NULL
, 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 pr_err("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 pr_err("%s does not appear to be active.\n",
106 if (ioctl(fd
, STOP_ARRAY_RO
, NULL
)) {
107 pr_err("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 pr_err("failed to set writable for %s: %s\n",
115 devname
, strerror(errno
));
130 static void remove_devices(char *devnm
, char *path
)
133 * Remove names at 'path' - possibly with
134 * partition suffixes - which link to the 'standard'
135 * name for devnm. These were probably created
136 * by mdadm when the array was assembled.
149 sprintf(base
, "/dev/%s", devnm
);
150 be
= base
+ strlen(base
);
152 path2
= xmalloc(strlen(path
)+20);
154 pe
= path2
+ strlen(path2
);
156 for (part
= 0; part
< 16; part
++) {
158 sprintf(be
, "p%d", part
);
161 sprintf(pe
, "p%d", part
);
163 sprintf(pe
, "%d", part
);
165 n
= readlink(path2
, link
, sizeof(link
));
166 if (n
> 0 && (int)strlen(base
) == n
&&
167 strncmp(link
, base
, n
) == 0)
173 int Manage_runstop(char *devname
, int fd
, int runstop
,
174 int verbose
, int will_retry
)
176 /* Run or stop the array. Array must already be configured
177 * 'Run' requires >= 0.90.0
178 * 'will_retry' is only relevant for 'stop', and means
179 * that error messages are not wanted.
181 mdu_param_t param
; /* unused */
184 if (will_retry
&& verbose
== 0)
187 if (runstop
== -1 && md_get_version(fd
) < 9000) {
188 if (ioctl(fd
, STOP_MD
, 0) == 0)
190 pr_err("stopping device %s "
192 devname
, strerror(errno
));
196 if (md_get_version(fd
) < 9000) {
197 pr_err("need md driver version 0.90.0 or later\n");
202 if (ioctl(fd
, RUN_ARRAY
, ¶m
)) {
204 pr_err("failed to run array %s: %s\n",
205 devname
, strerror(errno
));
209 pr_err("started %s\n", devname
);
210 } else if (runstop
< 0){
211 struct map_ent
*map
= NULL
;
217 /* If this is an mdmon managed array, just write 'inactive'
218 * to the array state and let mdmon clear up.
220 strcpy(devnm
, fd2devnm(fd
));
221 /* Get EXCL access first. If this fails, then attempting
222 * to stop is probably a bad idea.
226 fd
= open(devname
, O_RDONLY
|O_EXCL
);
228 fd
= open_dev_flags(devnm
, O_RDONLY
|O_EXCL
);
229 if (fd
< 0 || strcmp(fd2devnm(fd
), devnm
) != 0) {
233 pr_err("Cannot get exclusive access to %s:"
235 "process, mounted filesystem "
236 "or active volume group?\n",
240 mdi
= sysfs_read(fd
, NULL
, GET_LEVEL
|GET_VERSION
);
242 mdi
->array
.level
> 0 &&
243 is_subarray(mdi
->text_version
)) {
245 /* This is mdmon managed. */
248 /* As we have an O_EXCL open, any use of the device
249 * which blocks STOP_ARRAY is probably a transient use,
250 * so it is reasonable to retry for a while - 5 seconds.
254 (err
= sysfs_set_str(mdi
, NULL
,
263 pr_err("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(devnm
);
275 pr_err("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 metadata_container_matches(m
->metadata_version
+9,
302 pr_err("Cannot stop container %s: "
303 "member %s still active\n",
311 /* As we have an O_EXCL open, any use of the device
312 * which blocks STOP_ARRAY is probably a transient use,
313 * so it is reasonable to retry for a while - 5 seconds.
316 while (count
&& fd
>= 0
317 && (err
= ioctl(fd
, STOP_ARRAY
, NULL
)) < 0
322 if (fd
>= 0 && err
) {
324 pr_err("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");
334 /* prior to 2.6.28, KOBJ_CHANGE was not sent when an md array
335 * was stopped, so We'll do it here just to be sure. Drop any
336 * partitions as well...
339 ioctl(fd
, BLKRRPART
, 0);
341 sysfs_uevent(mdi
, "change");
344 (stat("/dev/.udev", &stb
) != 0 ||
345 check_env("MDADM_NO_UDEV"))) {
346 struct map_ent
*mp
= map_by_devnm(&map
, devnm
);
347 remove_devices(devnm
, mp
? mp
->path
: NULL
);
351 pr_err("stopped %s\n", devname
);
353 map_remove(&map
, devnm
);
362 static struct mddev_dev
*add_one(struct mddev_dev
*dv
, char *name
, char disp
)
364 struct mddev_dev
*new;
365 new = xmalloc(sizeof(*new));
366 memset(new, 0, sizeof(*new));
367 new->devname
= xstrdup(name
);
368 new->disposition
= disp
;
369 new->next
= dv
->next
;
374 static void add_faulty(struct mddev_dev
*dv
, int fd
, char disp
)
376 mdu_array_info_t array
;
377 mdu_disk_info_t disk
;
381 if (ioctl(fd
, GET_ARRAY_INFO
, &array
) != 0)
384 remaining_disks
= array
.nr_disks
;
385 for (i
= 0; i
< MAX_DISKS
&& remaining_disks
> 0; i
++) {
388 if (ioctl(fd
, GET_DISK_INFO
, &disk
) != 0)
390 if (disk
.major
== 0 && disk
.minor
== 0)
393 if ((disk
.state
& 1) == 0) /* not faulty */
395 sprintf(buf
, "%d:%d", disk
.major
, disk
.minor
);
396 dv
= add_one(dv
, buf
, disp
);
400 static void add_detached(struct mddev_dev
*dv
, int fd
, char disp
)
402 mdu_array_info_t array
;
403 mdu_disk_info_t disk
;
407 if (ioctl(fd
, GET_ARRAY_INFO
, &array
) != 0)
410 remaining_disks
= array
.nr_disks
;
411 for (i
= 0; i
< MAX_DISKS
&& remaining_disks
> 0; i
++) {
415 if (ioctl(fd
, GET_DISK_INFO
, &disk
) != 0)
417 if (disk
.major
== 0 && disk
.minor
== 0)
420 if (disp
== 'f' && (disk
.state
& 1) != 0) /* already faulty */
422 sprintf(buf
, "%d:%d", disk
.major
, disk
.minor
);
423 sfd
= dev_open(buf
, O_RDONLY
);
430 /* Probably not detached */
432 dv
= add_one(dv
, buf
, disp
);
436 int attempt_re_add(int fd
, int tfd
, struct mddev_dev
*dv
,
437 struct supertype
*dev_st
, struct supertype
*tst
,
439 char *update
, char *devname
, int verbose
,
440 mdu_array_info_t
*array
)
446 dev_st
->ss
->getinfo_super(dev_st
, &mdi
, NULL
);
447 dev_st
->ss
->uuid_from_super(dev_st
, ouuid
);
449 tst
->ss
->uuid_from_super(tst
, duuid
);
451 /* Assume uuid matches: kernel will check */
452 memcpy(duuid
, ouuid
, sizeof(ouuid
));
453 if ((mdi
.disk
.state
& (1<<MD_DISK_ACTIVE
)) &&
454 !(mdi
.disk
.state
& (1<<MD_DISK_FAULTY
)) &&
455 memcmp(duuid
, ouuid
, sizeof(ouuid
))==0) {
456 /* Looks like it is worth a
457 * try. Need to make sure
458 * kernel will accept it
461 mdu_disk_info_t disc
;
462 /* re-add doesn't work for version-1 superblocks
465 if (array
->major_version
== 1 &&
466 get_linux_version() <= 2006018)
468 disc
.number
= mdi
.disk
.number
;
469 if (ioctl(fd
, GET_DISK_INFO
, &disc
) != 0
470 || disc
.major
!= 0 || disc
.minor
!= 0
473 disc
.major
= major(rdev
);
474 disc
.minor
= minor(rdev
);
475 disc
.number
= mdi
.disk
.number
;
476 disc
.raid_disk
= mdi
.disk
.raid_disk
;
477 disc
.state
= mdi
.disk
.state
;
478 if (dv
->writemostly
== 1)
479 disc
.state
|= 1 << MD_DISK_WRITEMOSTLY
;
480 if (dv
->writemostly
== 2)
481 disc
.state
&= ~(1 << MD_DISK_WRITEMOSTLY
);
482 remove_partitions(tfd
);
483 if (update
|| dv
->writemostly
> 0) {
485 tfd
= dev_open(dv
->devname
, O_RDWR
);
487 pr_err("failed to open %s for"
488 " superblock update during re-add\n", dv
->devname
);
492 if (dv
->writemostly
== 1)
493 rv
= dev_st
->ss
->update_super(
494 dev_st
, NULL
, "writemostly",
495 devname
, verbose
, 0, NULL
);
496 if (dv
->writemostly
== 2)
497 rv
= dev_st
->ss
->update_super(
498 dev_st
, NULL
, "readwrite",
499 devname
, verbose
, 0, NULL
);
501 rv
= dev_st
->ss
->update_super(
502 dev_st
, NULL
, update
,
503 devname
, verbose
, 0, NULL
);
505 rv
= dev_st
->ss
->store_super(dev_st
, tfd
);
508 pr_err("failed to update"
509 " superblock during re-add\n");
513 /* don't even try if disk is marked as faulty */
515 if (ioctl(fd
, ADD_NEW_DISK
, &disc
) == 0) {
517 pr_err("re-added %s\n", dv
->devname
);
520 if (errno
== ENOMEM
|| errno
== EROFS
) {
521 pr_err("add new device failed for %s: %s\n",
522 dv
->devname
, strerror(errno
));
523 if (dv
->disposition
== 'M')
532 int Manage_add(int fd
, int tfd
, struct mddev_dev
*dv
,
533 struct supertype
*tst
, mdu_array_info_t
*array
,
534 int force
, int verbose
, char *devname
,
535 char *update
, unsigned long rdev
, unsigned long long array_size
)
537 unsigned long long ldsize
;
538 struct supertype
*dev_st
= NULL
;
540 mdu_disk_info_t disc
;
542 if (!get_dev_size(tfd
, dv
->devname
, &ldsize
)) {
543 if (dv
->disposition
== 'M')
549 if (tst
->ss
->validate_geometry(
550 tst
, array
->level
, array
->layout
,
551 array
->raid_disks
, NULL
,
552 ldsize
>> 9, INVALID_SECTORS
, NULL
, NULL
, 0) == 0) {
554 pr_err("%s is larger than %s can "
556 " Add --force is you "
557 "really want to add this device.\n",
558 dv
->devname
, devname
);
561 pr_err("%s is larger than %s can "
563 " Adding anyway as --force "
565 dv
->devname
, devname
);
567 if (!tst
->ss
->external
&&
568 array
->major_version
== 0 &&
569 md_get_version(fd
)%100 < 2) {
570 if (ioctl(fd
, HOT_ADD_DISK
, rdev
)==0) {
572 pr_err("hot added %s\n",
577 pr_err("hot add failed for %s: %s\n",
578 dv
->devname
, strerror(errno
));
582 if (array
->not_persistent
== 0 || tst
->ss
->external
) {
584 /* need to find a sample superblock to copy, and
585 * a spare slot to use.
586 * For 'external' array (well, container based),
587 * We can just load the metadata for the array->
591 /* already loaded */;
592 else if (tst
->ss
->external
) {
593 tst
->ss
->load_container(tst
, fd
, NULL
);
594 } else for (j
= 0; j
< tst
->max_devs
; j
++) {
598 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
600 if (disc
.major
==0 && disc
.minor
==0)
602 if ((disc
.state
& 4)==0) /* sync */
604 /* Looks like a good device to try */
605 dev
= map_dev(disc
.major
, disc
.minor
, 1);
608 dfd
= dev_open(dev
, O_RDONLY
);
611 if (tst
->ss
->load_super(tst
, dfd
,
619 /* FIXME this is a bad test to be using */
620 if (!tst
->sb
&& dv
->disposition
!= 'a') {
621 /* we are re-adding a device to a
622 * completely dead array - have to depend
625 } else if (!tst
->sb
) {
626 pr_err("cannot load array metadata from %s\n", devname
);
630 /* Make sure device is large enough */
631 if (tst
->ss
->avail_size(tst
, ldsize
/512, INVALID_SECTORS
) <
633 if (dv
->disposition
== 'M')
635 pr_err("%s not large enough to join array\n",
640 /* Possibly this device was recently part of
641 * the array and was temporarily removed, and
642 * is now being re-added. If so, we can
646 if (array
->not_persistent
==0) {
647 dev_st
= dup_super(tst
);
648 dev_st
->ss
->load_super(dev_st
, tfd
, NULL
);
650 if (dev_st
&& dev_st
->sb
) {
651 int rv
= attempt_re_add(fd
, tfd
, dv
,
657 dev_st
->ss
->free_super(dev_st
);
661 if (dv
->disposition
== 'M') {
663 pr_err("--re-add for %s to %s is not possible\n",
664 dv
->devname
, devname
);
667 if (dv
->disposition
== 'A') {
668 pr_err("--re-add for %s to %s is not possible\n",
669 dv
->devname
, devname
);
672 if (array
->active_disks
< array
->raid_disks
) {
673 char *avail
= xcalloc(array
->raid_disks
, 1);
677 for (d
= 0; d
< MAX_DISKS
&& found
< array
->active_disks
; d
++) {
679 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
681 if (disc
.major
== 0 && disc
.minor
== 0)
683 if (!(disc
.state
& (1<<MD_DISK_SYNC
)))
685 avail
[disc
.raid_disk
] = 1;
688 array_failed
= !enough(array
->level
, array
->raid_disks
,
689 array
->layout
, 1, avail
);
693 pr_err("%s has failed so using --add cannot work and might destroy\n",
695 pr_err("data on %s. You should stop the array and re-assemble it.\n",
700 /* non-persistent. Must ensure that new drive
701 * is at least array->size big.
703 if (ldsize
/512 < array_size
) {
704 pr_err("%s not large enough to join array\n",
709 /* committed to really trying this device now*/
710 remove_partitions(tfd
);
712 /* in 2.6.17 and earlier, version-1 superblocks won't
713 * use the number we write, but will choose a free number.
714 * we must choose the same free number, which requires
715 * starting at 'raid_disks' and counting up
717 for (j
= array
->raid_disks
; j
< tst
->max_devs
; j
++) {
719 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
721 if (disc
.major
==0 && disc
.minor
==0)
723 if (disc
.state
& 8) /* removed */
726 disc
.major
= major(rdev
);
727 disc
.minor
= minor(rdev
);
730 if (array
->not_persistent
==0) {
732 if (dv
->writemostly
== 1)
733 disc
.state
|= 1 << MD_DISK_WRITEMOSTLY
;
734 dfd
= dev_open(dv
->devname
, O_RDWR
| O_EXCL
|O_DIRECT
);
735 if (tst
->ss
->add_to_super(tst
, &disc
, dfd
,
736 dv
->devname
, INVALID_SECTORS
))
738 if (tst
->ss
->write_init_super(tst
))
740 } else if (dv
->disposition
== 'A') {
741 /* this had better be raid1.
742 * As we are "--re-add"ing we must find a spare slot
745 char *used
= xcalloc(array
->raid_disks
, 1);
746 for (j
= 0; j
< tst
->max_devs
; j
++) {
747 mdu_disk_info_t disc2
;
749 if (ioctl(fd
, GET_DISK_INFO
, &disc2
))
751 if (disc2
.major
==0 && disc2
.minor
==0)
753 if (disc2
.state
& 8) /* removed */
755 if (disc2
.raid_disk
< 0)
757 if (disc2
.raid_disk
> array
->raid_disks
)
759 used
[disc2
.raid_disk
] = 1;
761 for (j
= 0 ; j
< array
->raid_disks
; j
++)
764 disc
.state
|= (1<<MD_DISK_SYNC
);
769 if (dv
->writemostly
== 1)
770 disc
.state
|= (1 << MD_DISK_WRITEMOSTLY
);
771 if (tst
->ss
->external
) {
773 * to an external metadata container */
774 struct mdinfo new_mdi
;
780 strcpy(devnm
, fd2devnm(fd
));
782 container_fd
= open_dev_excl(devnm
);
783 if (container_fd
< 0) {
784 pr_err("add failed for %s:"
785 " could not get exclusive access to container\n",
787 tst
->ss
->free_super(tst
);
791 Kill(dv
->devname
, NULL
, 0, -1, 0);
792 dfd
= dev_open(dv
->devname
, O_RDWR
| O_EXCL
|O_DIRECT
);
793 if (mdmon_running(tst
->container_devnm
))
794 tst
->update_tail
= &tst
->updates
;
795 if (tst
->ss
->add_to_super(tst
, &disc
, dfd
,
796 dv
->devname
, INVALID_SECTORS
)) {
801 if (tst
->update_tail
)
802 flush_metadata_updates(tst
);
804 tst
->ss
->sync_metadata(tst
);
806 sra
= sysfs_read(container_fd
, NULL
, 0);
808 pr_err("add failed for %s: sysfs_read failed\n",
811 tst
->ss
->free_super(tst
);
814 sra
->array
.level
= LEVEL_CONTAINER
;
815 /* Need to set data_offset and component_size */
816 tst
->ss
->getinfo_super(tst
, &new_mdi
, NULL
);
817 new_mdi
.disk
.major
= disc
.major
;
818 new_mdi
.disk
.minor
= disc
.minor
;
819 new_mdi
.recovery_start
= 0;
820 /* Make sure fds are closed as they are O_EXCL which
821 * would block add_disk */
822 tst
->ss
->free_super(tst
);
823 if (sysfs_add_disk(sra
, &new_mdi
, 0) != 0) {
824 pr_err("add new device to external metadata"
825 " failed for %s\n", dv
->devname
);
834 tst
->ss
->free_super(tst
);
835 if (ioctl(fd
, ADD_NEW_DISK
, &disc
)) {
836 pr_err("add new device failed for %s as %d: %s\n",
837 dv
->devname
, j
, strerror(errno
));
842 pr_err("added %s\n", dv
->devname
);
846 int Manage_remove(struct supertype
*tst
, int fd
, struct mddev_dev
*dv
,
847 int sysfd
, unsigned long rdev
, int verbose
, char *devname
)
852 if (tst
->ss
->external
) {
853 /* To remove a device from a container, we must
854 * check that it isn't in use in an array.
855 * This involves looking in the 'holders'
856 * directory - there must be just one entry,
858 * To ensure that it doesn't get used as a
859 * hot spare while we are checking, we
860 * get an O_EXCL open on the container
864 strcpy(devnm
, fd2devnm(fd
));
865 lfd
= open_dev_excl(devnm
);
867 pr_err("Cannot get exclusive access "
868 " to container - odd\n");
871 /* We may not be able to check on holders in
872 * sysfs, either because we don't have the dev num
873 * (rdev == 0) or because the device has been detached
874 * and the 'holders' directory no longer exists
875 * (ret == -1). In that case, assume it is OK to
881 ret
= sysfs_unique_holder(devnm
, rdev
);
883 pr_err("%s is not a member, cannot remove.\n",
889 pr_err("%s is still in use, cannot remove.\n",
895 /* FIXME check that it is a current member */
897 /* device has been removed and we don't know
898 * the major:minor number
900 int n
= write(sysfd
, "remove", 6);
906 err
= ioctl(fd
, HOT_REMOVE_DISK
, rdev
);
907 if (err
&& errno
== ENODEV
) {
908 /* Old kernels rejected this if no personality
910 struct mdinfo
*sra
= sysfs_read(fd
, NULL
, GET_DEVS
);
911 struct mdinfo
*dv
= NULL
;
914 for ( ; dv
; dv
=dv
->next
)
915 if (dv
->disk
.major
== (int)major(rdev
) &&
916 dv
->disk
.minor
== (int)minor(rdev
))
919 err
= sysfs_set_str(sra
, dv
,
928 pr_err("hot remove failed "
929 "for %s: %s\n", dv
->devname
,
935 if (tst
->ss
->external
) {
937 * Before dropping our exclusive open we make an
938 * attempt at preventing mdmon from seeing an
939 * 'add' event before reconciling this 'remove'
942 char *devnm
= fd2devnm(fd
);
945 pr_err("unable to get container name\n");
954 pr_err("hot removed %s from %s\n",
955 dv
->devname
, devname
);
959 int Manage_replace(struct supertype
*tst
, int fd
, struct mddev_dev
*dv
,
960 unsigned long rdev
, int verbose
, char *devname
)
962 struct mdinfo
*mdi
, *di
;
963 if (tst
->ss
->external
) {
964 pr_err("--replace only supported for native metadata (0.90 or 1.x)\n");
967 /* Need to find the device in sysfs and add 'want_replacement' to the
970 mdi
= sysfs_read(fd
, NULL
, GET_DEVS
);
971 if (!mdi
|| !mdi
->devs
) {
972 pr_err("Cannot find status of %s to enable replacement - strange\n",
976 for (di
= mdi
->devs
; di
; di
= di
->next
)
977 if (di
->disk
.major
== (int)major(rdev
) &&
978 di
->disk
.minor
== (int)minor(rdev
))
982 if (di
->disk
.raid_disk
< 0) {
983 pr_err("%s is not active and so cannot be replaced.\n",
988 rv
= sysfs_set_str(mdi
, di
,
989 "state", "want_replacement");
992 pr_err("Failed to request replacement for %s\n",
997 pr_err("Marked %s (device %d in %s) for replacement\n",
998 dv
->devname
, di
->disk
.raid_disk
, devname
);
999 /* If there is a matching 'with', we need to tell it which
1002 while (dv
&& dv
->disposition
!= 'W')
1005 dv
->disposition
= 'w';
1006 dv
->used
= di
->disk
.raid_disk
;
1011 pr_err("%s not found in %s so cannot --replace it\n",
1012 dv
->devname
, devname
);
1016 int Manage_with(struct supertype
*tst
, int fd
, struct mddev_dev
*dv
,
1017 unsigned long rdev
, int verbose
, char *devname
)
1019 struct mdinfo
*mdi
, *di
;
1020 /* try to set 'slot' for 'rdev' in 'fd' to 'dv->used' */
1021 mdi
= sysfs_read(fd
, NULL
, GET_DEVS
|GET_STATE
);
1022 if (!mdi
|| !mdi
->devs
) {
1023 pr_err("Cannot find status of %s to enable replacement - strange\n",
1027 for (di
= mdi
->devs
; di
; di
= di
->next
)
1028 if (di
->disk
.major
== (int)major(rdev
) &&
1029 di
->disk
.minor
== (int)minor(rdev
))
1033 if (di
->disk
.state
& (1<<MD_DISK_FAULTY
)) {
1034 pr_err("%s is faulty and cannot be a replacement\n",
1039 if (di
->disk
.raid_disk
>= 0) {
1040 pr_err("%s is active and cannot be a replacement\n",
1045 rv
= sysfs_set_num(mdi
, di
,
1049 pr_err("Failed to %s as preferred replacement.\n",
1054 pr_err("Marked %s in %s as replacement for device %d\n",
1055 dv
->devname
, devname
, dv
->used
);
1059 pr_err("%s not found in %s so cannot make it preferred replacement\n",
1060 dv
->devname
, devname
);
1064 int Manage_subdevs(char *devname
, int fd
,
1065 struct mddev_dev
*devlist
, int verbose
, int test
,
1066 char *update
, int force
)
1068 /* Do something to each dev.
1070 * 'a' - add the device
1072 * If that fails EINVAL, try ADD_NEW_DISK
1073 * 'A' - re-add the device
1074 * 'r' - remove the device: HOT_REMOVE_DISK
1075 * device can be 'faulty' or 'detached' in which case all
1076 * matching devices are removed.
1077 * 'f' - set the device faulty SET_DISK_FAULTY
1078 * device can be 'detached' in which case any device that
1079 * is inaccessible will be marked faulty.
1080 * 'R' - mark this device as wanting replacement.
1081 * 'W' - this device is added if necessary and activated as
1082 * a replacement for a previous 'R' device.
1084 * 'w' - 'W' will be changed to 'w' when it is paired with
1085 * a 'R' device. If a 'W' is found while walking the list
1086 * it must be unpaired, and is an error.
1087 * 'M' - this is created by a 'missing' target. It is a slight
1089 * 'F' - Another variant of 'A', where the device was faulty
1090 * so must be removed from the array first.
1092 * For 'f' and 'r', the device can also be a kernel-internal
1093 * name such as 'sdb'.
1095 mdu_array_info_t array
;
1096 unsigned long long array_size
;
1097 struct mddev_dev
*dv
;
1100 struct supertype
*tst
;
1101 char *subarray
= NULL
;
1103 int count
= 0; /* number of actions taken */
1108 if (ioctl(fd
, GET_ARRAY_INFO
, &array
)) {
1109 pr_err("Cannot get array info for %s\n",
1113 sysfs_init(&info
, fd
, NULL
);
1115 /* array.size is only 32 bits and may be truncated.
1116 * So read from sysfs if possible, and record number of sectors
1119 array_size
= get_component_size(fd
);
1120 if (array_size
<= 0)
1121 array_size
= array
.size
* 2;
1123 tst
= super_by_fd(fd
, &subarray
);
1125 pr_err("unsupport array - version %d.%d\n",
1126 array
.major_version
, array
.minor_version
);
1131 for (dv
= devlist
; dv
; dv
= dv
->next
) {
1134 if (strcmp(dv
->devname
, "failed") == 0 ||
1135 strcmp(dv
->devname
, "faulty") == 0) {
1136 if (dv
->disposition
!= 'A'
1137 && dv
->disposition
!= 'r') {
1138 pr_err("%s only meaningful "
1139 "with -r or --re-add, not -%c\n",
1140 dv
->devname
, dv
->disposition
);
1143 add_faulty(dv
, fd
, (dv
->disposition
== 'A'
1147 if (strcmp(dv
->devname
, "detached") == 0) {
1148 if (dv
->disposition
!= 'r' && dv
->disposition
!= 'f') {
1149 pr_err("%s only meaningful "
1150 "with -r of -f, not -%c\n",
1151 dv
->devname
, dv
->disposition
);
1154 add_detached(dv
, fd
, dv
->disposition
);
1158 if (strcmp(dv
->devname
, "missing") == 0) {
1159 struct mddev_dev
*add_devlist
= NULL
;
1160 struct mddev_dev
**dp
;
1161 if (dv
->disposition
!= 'A') {
1162 pr_err("'missing' only meaningful "
1166 add_devlist
= conf_get_devs();
1167 if (add_devlist
== NULL
) {
1168 pr_err("no devices to scan for missing members.");
1171 for (dp
= &add_devlist
; *dp
; dp
= & (*dp
)->next
)
1172 /* 'M' (for 'missing') is like 'A' without errors */
1173 (*dp
)->disposition
= 'M';
1175 dv
->next
= add_devlist
;
1179 if (strchr(dv
->devname
, '/') == NULL
&&
1180 strchr(dv
->devname
, ':') == NULL
&&
1181 strlen(dv
->devname
) < 50) {
1182 /* Assume this is a kernel-internal name like 'sda1' */
1185 if (dv
->disposition
!= 'r' && dv
->disposition
!= 'f') {
1186 pr_err("%s only meaningful "
1187 "with -r or -f, not -%c\n",
1188 dv
->devname
, dv
->disposition
);
1192 sprintf(dname
, "dev-%s", dv
->devname
);
1193 sysfd
= sysfs_open(fd2devnm(fd
), dname
, "block/dev");
1197 if (sysfs_fd_get_str(sysfd
, dn
, 20) > 0 &&
1198 sscanf(dn
, "%d:%d", &mj
,&mn
) == 2) {
1199 stb
.st_rdev
= makedev(mj
,mn
);
1206 sysfd
= sysfs_open(fd2devnm(fd
), dname
, "state");
1208 pr_err("%s does not appear "
1209 "to be a component of %s\n",
1210 dv
->devname
, devname
);
1215 tfd
= dev_open(dv
->devname
, O_RDONLY
);
1219 int open_err
= errno
;
1220 if (stat(dv
->devname
, &stb
) != 0) {
1221 pr_err("Cannot find %s: %s\n",
1222 dv
->devname
, strerror(errno
));
1225 if ((stb
.st_mode
& S_IFMT
) != S_IFBLK
) {
1226 if (dv
->disposition
== 'M')
1227 /* non-fatal. Also improbable */
1229 pr_err("%s is not a block device.\n",
1233 if (dv
->disposition
== 'r')
1234 /* Be happy, the stat worked, that is
1235 * enough for --remove
1239 if (dv
->disposition
== 'M')
1242 pr_err("Cannot open %s: %s\n",
1243 dv
->devname
, strerror(open_err
));
1248 switch(dv
->disposition
){
1250 pr_err("internal error - devmode[%s]=%d\n",
1251 dv
->devname
, dv
->disposition
);
1255 case 'M': /* --re-add missing */
1256 case 'F': /* --re-add faulty */
1257 /* add the device */
1259 pr_err("Cannot add disks to a"
1260 " \'member\' array, perform this"
1261 " operation on the parent container\n");
1264 if (dv
->disposition
== 'F')
1265 /* Need to remove first */
1266 ioctl(fd
, HOT_REMOVE_DISK
,
1267 (unsigned long)stb
.st_rdev
);
1268 /* Make sure it isn't in use (in 2.6 or later) */
1269 tfd
= dev_open(dv
->devname
, O_RDONLY
|O_EXCL
);
1271 /* We know no-one else is using it. We'll
1272 * need non-exclusive access to add it, so
1276 tfd
= dev_open(dv
->devname
, O_RDONLY
);
1279 if (dv
->disposition
== 'M')
1281 pr_err("Cannot open %s: %s\n",
1282 dv
->devname
, strerror(errno
));
1286 if (sysfs_freeze_array(&info
) == 1)
1291 rv
= Manage_add(fd
, tfd
, dv
, tst
, &array
,
1292 force
, verbose
, devname
, update
,
1293 stb
.st_rdev
, array_size
);
1305 pr_err("Cannot remove disks from a"
1306 " \'member\' array, perform this"
1307 " operation on the parent container\n");
1310 rv
= Manage_remove(tst
, fd
, dv
, sysfd
,
1311 stb
.st_rdev
, verbose
,
1322 case 'f': /* set faulty */
1323 /* FIXME check current member */
1324 if ((sysfd
>= 0 && write(sysfd
, "faulty", 6) != 6) ||
1325 (sysfd
< 0 && ioctl(fd
, SET_DISK_FAULTY
,
1326 (unsigned long) stb
.st_rdev
))) {
1329 pr_err("set device faulty failed for %s: %s\n",
1330 dv
->devname
, strerror(errno
));
1340 pr_err("set %s faulty in %s\n",
1341 dv
->devname
, devname
);
1343 case 'R': /* Mark as replaceable */
1345 pr_err("Cannot replace disks in a"
1346 " \'member\' array, perform this"
1347 " operation on the parent container\n");
1351 if (sysfs_freeze_array(&info
) == 1)
1356 rv
= Manage_replace(tst
, fd
, dv
,
1357 stb
.st_rdev
, verbose
,
1365 case 'W': /* --with device that doesn't match */
1366 pr_err("No matching --replace device for --with %s\n",
1369 case 'w': /* --with device which was matched */
1370 rv
= Manage_with(tst
, fd
, dv
,
1371 stb
.st_rdev
, verbose
, devname
);
1378 sysfs_set_str(&info
, NULL
, "sync_action","idle");
1379 if (test
&& count
== 0)
1385 sysfs_set_str(&info
, NULL
, "sync_action","idle");
1386 return !test
&& busy
? 2 : 1;
1389 int autodetect(void)
1391 /* Open any md device, and issue the RAID_AUTORUN ioctl */
1393 int fd
= dev_open("9:0", O_RDONLY
);
1395 if (ioctl(fd
, RAID_AUTORUN
, 0) == 0)
1402 int Update_subarray(char *dev
, char *subarray
, char *update
, struct mddev_ident
*ident
, int verbose
)
1404 struct supertype supertype
, *st
= &supertype
;
1407 memset(st
, 0, sizeof(*st
));
1409 fd
= open_subarray(dev
, subarray
, st
, verbose
< 0);
1413 if (!st
->ss
->update_subarray
) {
1415 pr_err("Operation not supported for %s metadata\n",
1420 if (mdmon_running(st
->devnm
))
1421 st
->update_tail
= &st
->updates
;
1423 rv
= st
->ss
->update_subarray(st
, subarray
, update
, ident
);
1427 pr_err("Failed to update %s of subarray-%s in %s\n",
1428 update
, subarray
, dev
);
1429 } else if (st
->update_tail
)
1430 flush_metadata_updates(st
);
1432 st
->ss
->sync_metadata(st
);
1434 if (rv
== 0 && strcmp(update
, "name") == 0 && verbose
>= 0)
1435 pr_err("Updated subarray-%s name from %s, UUIDs may have changed\n",
1439 st
->ss
->free_super(st
);
1445 /* Move spare from one array to another If adding to destination array fails
1446 * add back to original array.
1447 * Returns 1 on success, 0 on failure */
1448 int move_spare(char *from_devname
, char *to_devname
, dev_t devid
)
1450 struct mddev_dev devlist
;
1453 /* try to remove and add */
1454 int fd1
= open(to_devname
, O_RDONLY
);
1455 int fd2
= open(from_devname
, O_RDONLY
);
1457 if (fd1
< 0 || fd2
< 0) {
1458 if (fd1
>=0) close(fd1
);
1459 if (fd2
>=0) close(fd2
);
1463 devlist
.next
= NULL
;
1465 devlist
.writemostly
= 0;
1466 devlist
.devname
= devname
;
1467 sprintf(devname
, "%d:%d", major(devid
), minor(devid
));
1469 devlist
.disposition
= 'r';
1470 if (Manage_subdevs(from_devname
, fd2
, &devlist
, -1, 0, NULL
, 0) == 0) {
1471 devlist
.disposition
= 'a';
1472 if (Manage_subdevs(to_devname
, fd1
, &devlist
, -1, 0, NULL
, 0) == 0) {
1473 /* make sure manager is aware of changes */
1474 ping_manager(to_devname
);
1475 ping_manager(from_devname
);
1480 else Manage_subdevs(from_devname
, fd2
, &devlist
, -1, 0, NULL
, 0);