]>
git.ipfire.org Git - thirdparty/mdadm.git/blob - Manage.c
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 #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_run(char *devname
, int fd
, struct context
*c
)
175 /* Run the array. Array must already be configured
180 if (md_get_version(fd
) < 9000) {
181 pr_err("need md driver version 0.90.0 or later\n");
186 pr_err("Cannot find %s in sysfs!!\n", devname
);
190 return IncrementalScan(c
, nm
);
193 int Manage_stop(char *devname
, int fd
, int verbose
, int will_retry
)
195 /* Stop the array. Array must already be configured
196 * 'will_retry' means that error messages are not wanted.
199 struct map_ent
*map
= NULL
;
206 unsigned long long rd1
, rd2
;
208 if (will_retry
&& verbose
== 0)
211 if (md_get_version(fd
) < 9000) {
212 if (ioctl(fd
, STOP_MD
, 0) == 0)
214 pr_err("stopping device %s failed: %s\n",
215 devname
, strerror(errno
));
219 strcpy(devnm
, fd2devnm(fd
));
220 /* Get EXCL access first. If this fails, then attempting
221 * to stop is probably a bad idea.
223 mdi
= sysfs_read(fd
, NULL
, GET_LEVEL
|GET_COMPONENT
|GET_VERSION
);
224 if (mdi
&& is_subarray(mdi
->text_version
)) {
226 strncpy(container
, mdi
->text_version
+1, sizeof(container
));
227 container
[sizeof(container
)-1] = 0;
228 sl
= strchr(container
, '/');
235 while (((fd
= ((devname
[0] == '/')
236 ?open(devname
, O_RDONLY
|O_EXCL
)
237 :open_dev_flags(devnm
, O_RDONLY
|O_EXCL
))) < 0
238 || strcmp(fd2devnm(fd
), devnm
) != 0)
240 && mdmon_running(container
)
242 /* Can't open, so something might be wrong. However it
243 * is a container, so we might be racing with mdmon, so
248 flush_mdmon(container
);
251 if (fd
< 0 || strcmp(fd2devnm(fd
), devnm
) != 0) {
255 pr_err("Cannot get exclusive access to %s:Perhaps a running process, mounted filesystem or active volume group?\n",
259 /* If this is an mdmon managed array, just write 'inactive'
260 * to the array state and let mdmon clear up.
263 mdi
->array
.level
> 0 &&
264 is_subarray(mdi
->text_version
)) {
266 /* This is mdmon managed. */
269 /* As we had an O_EXCL open, any use of the device
270 * which blocks STOP_ARRAY is probably a transient use,
271 * so it is reasonable to retry for a while - 5 seconds.
275 (err
= sysfs_set_str(mdi
, NULL
,
284 pr_err("failed to stop array %s: %s\n",
285 devname
, strerror(errno
));
290 /* Give monitor a chance to act */
291 ping_monitor(mdi
->text_version
);
293 fd
= open_dev_excl(devnm
);
296 pr_err("failed to completely stop %s: Device is busy\n",
302 mdi
->array
.major_version
== -1 &&
303 mdi
->array
.minor_version
== -2 &&
304 !is_subarray(mdi
->text_version
)) {
305 struct mdstat_ent
*mds
, *m
;
306 /* container, possibly mdmon-managed.
307 * Make sure mdmon isn't opening it, which
308 * would interfere with the 'stop'
310 ping_monitor(mdi
->sys_name
);
312 /* now check that there are no existing arrays
313 * which are members of this array
315 mds
= mdstat_read(0, 0);
316 for (m
= mds
; m
; m
= m
->next
)
317 if (m
->metadata_version
&&
318 strncmp(m
->metadata_version
, "external:", 9)==0 &&
319 metadata_container_matches(m
->metadata_version
+9,
322 pr_err("Cannot stop container %s: member %s still active\n",
330 /* If the array is undergoing a reshape which changes the number
331 * of devices, then it would be nice to stop it at a point where
332 * it has completed a full number of stripes in both old and
333 * new layouts as this will allow the reshape to be reverted.
334 * So if 'sync_action' is "reshape" and 'raid_disks' shows two
335 * different numbers, then
337 * - set sync_max to next multiple of both data_disks and
338 * chunk sizes (or next but one)
340 * - wait on 'sync_completed' for that point to be reached.
342 if (mdi
&& (mdi
->array
.level
>= 4 && mdi
->array
.level
<= 6) &&
343 sysfs_attribute_available(mdi
, NULL
, "sync_action") &&
344 sysfs_attribute_available(mdi
, NULL
, "reshape_direction") &&
345 sysfs_get_str(mdi
, NULL
, "sync_action", buf
, 20) > 0 &&
346 strcmp(buf
, "reshape\n") == 0 &&
347 sysfs_get_two(mdi
, NULL
, "raid_disks", &rd1
, &rd2
) == 2) {
348 unsigned long long position
, curr
;
349 unsigned long long chunk1
, chunk2
;
350 unsigned long long rddiv
, chunkdiv
;
351 unsigned long long sectors
;
352 unsigned long long sync_max
, old_sync_max
;
353 unsigned long long completed
;
359 while (rd1
> rd2
&& delay
> 0 &&
360 sysfs_get_ll(mdi
, NULL
, "sync_max", &old_sync_max
) == 0) {
361 /* must be in the critical section - wait a bit */
366 if (sysfs_set_str(mdi
, NULL
, "sync_action", "frozen") != 0)
368 /* Array is frozen */
370 rd1
-= mdi
->array
.level
== 6 ? 2 : 1;
371 rd2
-= mdi
->array
.level
== 6 ? 2 : 1;
372 sysfs_get_str(mdi
, NULL
, "reshape_direction", buf
, sizeof(buf
));
373 if (strncmp(buf
, "back", 4) == 0)
375 if (sysfs_get_ll(mdi
, NULL
, "reshape_position", &position
) != 0) {
376 /* reshape must have finished now */
377 sysfs_set_str(mdi
, NULL
, "sync_action", "idle");
380 sysfs_get_two(mdi
, NULL
, "chunk_size", &chunk1
, &chunk2
);
383 rddiv
= GCD(rd1
, rd2
);
384 chunkdiv
= GCD(chunk1
, chunk2
);
385 sectors
= (chunk1
/chunkdiv
) * chunk2
* (rd1
/rddiv
) * rd2
;
388 /* Need to subtract 'reshape_position' from
389 * array size to get equivalent of sync_max.
390 * Size calculation based on raid5_size in kernel.
392 unsigned long long size
= mdi
->component_size
;
395 /* rd1 must be smaller */
396 /* Reshape may have progressed further backwards than
397 * recorded, so target even further back (hence "-1")
399 position
= (position
/ sectors
- 1) * sectors
;
400 /* rd1 is always the conversion factor between 'sync'
401 * position and 'reshape' position.
402 * We read 1 "new" stripe worth of data from where-ever,
403 * and when write out that full stripe.
405 sync_max
= size
- position
/rd1
;
407 /* Reshape will very likely be beyond position, and it may
408 * be too late to stop at '+1', so aim for '+2'
410 position
= (position
/ sectors
+ 2) * sectors
;
411 sync_max
= position
/rd1
;
413 if (sysfs_get_ll(mdi
, NULL
, "sync_max", &old_sync_max
) < 0)
414 old_sync_max
= mdi
->component_size
;
415 /* Must not advance sync_max as that could confuse
416 * the reshape monitor */
417 if (sync_max
< old_sync_max
)
418 sysfs_set_num(mdi
, NULL
, "sync_max", sync_max
);
419 sysfs_set_str(mdi
, NULL
, "sync_action", "idle");
421 /* That should have set things going again. Now we
422 * wait a little while (3 second max) for sync_completed
423 * to reach the target.
424 * The reshape process can block for 500msec if
425 * the sync speed limit is hit, so we need to wait
426 * a lot longer than that. 1 second is usually
430 scfd
= sysfs_open(mdi
->sys_name
, NULL
, "sync_completed");
431 while (scfd
>= 0 && delay
> 0 && old_sync_max
> 0) {
432 unsigned long long max_completed
;
433 sysfs_get_ll(mdi
, NULL
, "reshape_position", &curr
);
434 sysfs_fd_get_str(scfd
, buf
, sizeof(buf
));
435 if (strncmp(buf
, "none", 4) == 0) {
436 /* Either reshape has aborted, or hasn't
437 * quite started yet. Wait a bit and
438 * check 'sync_action' to see.
441 sysfs_get_str(mdi
, NULL
, "sync_action", buf
, sizeof(buf
));
442 if (strncmp(buf
, "reshape", 7) != 0)
446 if (sysfs_fd_get_two(scfd
, &completed
,
447 &max_completed
) == 2 &&
448 /* 'completed' sometimes reads as max-uulong */
449 completed
< max_completed
&&
450 (completed
> sync_max
||
451 (completed
== sync_max
&& curr
!= position
))) {
452 while (completed
> sync_max
) {
453 sync_max
+= sectors
/ rd1
;
459 if (sync_max
< old_sync_max
)
460 sysfs_set_num(mdi
, NULL
, "sync_max", sync_max
);
463 if (!backwards
&& curr
>= position
)
465 if (backwards
&& curr
<= position
)
467 sysfs_wait(scfd
, &delay
);
475 /* As we have an O_EXCL open, any use of the device
476 * which blocks STOP_ARRAY is probably a transient use,
477 * so it is reasonable to retry for a while - 5 seconds.
480 while (count
&& fd
>= 0
481 && (err
= ioctl(fd
, STOP_ARRAY
, NULL
)) < 0
486 if (fd
>= 0 && err
) {
488 pr_err("failed to stop array %s: %s\n",
489 devname
, strerror(errno
));
491 cont_err("Perhaps a running process, mounted filesystem or active volume group?\n");
497 if (get_linux_version() < 2006028) {
498 /* prior to 2.6.28, KOBJ_CHANGE was not sent when an md array
499 * was stopped, so We'll do it here just to be sure. Drop any
500 * partitions as well...
503 ioctl(fd
, BLKRRPART
, 0);
505 sysfs_uevent(mdi
, "change");
508 if (devnm
[0] && use_udev()) {
509 struct map_ent
*mp
= map_by_devnm(&map
, devnm
);
510 remove_devices(devnm
, mp
? mp
->path
: NULL
);
514 pr_err("stopped %s\n", devname
);
516 map_remove(&map
, devnm
);
525 static struct mddev_dev
*add_one(struct mddev_dev
*dv
, char *name
, char disp
)
527 struct mddev_dev
*new;
528 new = xmalloc(sizeof(*new));
529 memset(new, 0, sizeof(*new));
530 new->devname
= xstrdup(name
);
531 new->disposition
= disp
;
532 new->next
= dv
->next
;
537 static void add_faulty(struct mddev_dev
*dv
, int fd
, char disp
)
539 mdu_array_info_t array
;
540 mdu_disk_info_t disk
;
544 if (ioctl(fd
, GET_ARRAY_INFO
, &array
) != 0)
547 remaining_disks
= array
.nr_disks
;
548 for (i
= 0; i
< MAX_DISKS
&& remaining_disks
> 0; i
++) {
551 if (ioctl(fd
, GET_DISK_INFO
, &disk
) != 0)
553 if (disk
.major
== 0 && disk
.minor
== 0)
556 if ((disk
.state
& 1) == 0) /* not faulty */
558 sprintf(buf
, "%d:%d", disk
.major
, disk
.minor
);
559 dv
= add_one(dv
, buf
, disp
);
563 static void add_detached(struct mddev_dev
*dv
, int fd
, char disp
)
565 mdu_array_info_t array
;
566 mdu_disk_info_t disk
;
570 if (ioctl(fd
, GET_ARRAY_INFO
, &array
) != 0)
573 remaining_disks
= array
.nr_disks
;
574 for (i
= 0; i
< MAX_DISKS
&& remaining_disks
> 0; i
++) {
578 if (ioctl(fd
, GET_DISK_INFO
, &disk
) != 0)
580 if (disk
.major
== 0 && disk
.minor
== 0)
583 if (disp
== 'f' && (disk
.state
& 1) != 0) /* already faulty */
585 sprintf(buf
, "%d:%d", disk
.major
, disk
.minor
);
586 sfd
= dev_open(buf
, O_RDONLY
);
593 /* Probably not detached */
595 dv
= add_one(dv
, buf
, disp
);
599 static void add_set(struct mddev_dev
*dv
, int fd
, char set_char
)
601 mdu_array_info_t array
;
602 mdu_disk_info_t disk
;
607 if (ioctl(fd
, GET_ARRAY_INFO
, &array
) != 0)
609 if (array
.level
!= 10)
611 copies
= ((array
.layout
& 0xff) *
612 ((array
.layout
>> 8) & 0xff));
613 if (array
.raid_disks
% copies
)
616 remaining_disks
= array
.nr_disks
;
617 for (i
= 0; i
< MAX_DISKS
&& remaining_disks
> 0; i
++) {
620 if (ioctl(fd
, GET_DISK_INFO
, &disk
) != 0)
622 if (disk
.major
== 0 && disk
.minor
== 0)
625 set
= disk
.raid_disk
% copies
;
626 if (set_char
!= set
+ 'A')
628 sprintf(buf
, "%d:%d", disk
.major
, disk
.minor
);
629 dv
= add_one(dv
, buf
, dv
->disposition
);
633 int attempt_re_add(int fd
, int tfd
, struct mddev_dev
*dv
,
634 struct supertype
*dev_st
, struct supertype
*tst
,
636 char *update
, char *devname
, int verbose
,
637 mdu_array_info_t
*array
)
643 dev_st
->ss
->getinfo_super(dev_st
, &mdi
, NULL
);
644 dev_st
->ss
->uuid_from_super(dev_st
, ouuid
);
646 tst
->ss
->uuid_from_super(tst
, duuid
);
648 /* Assume uuid matches: kernel will check */
649 memcpy(duuid
, ouuid
, sizeof(ouuid
));
650 if ((mdi
.disk
.state
& (1<<MD_DISK_ACTIVE
)) &&
651 !(mdi
.disk
.state
& (1<<MD_DISK_FAULTY
)) &&
652 memcmp(duuid
, ouuid
, sizeof(ouuid
))==0) {
653 /* Looks like it is worth a
654 * try. Need to make sure
655 * kernel will accept it
658 mdu_disk_info_t disc
;
659 /* re-add doesn't work for version-1 superblocks
662 if (array
->major_version
== 1 &&
663 get_linux_version() <= 2006018)
665 disc
.number
= mdi
.disk
.number
;
666 if (ioctl(fd
, GET_DISK_INFO
, &disc
) != 0
667 || disc
.major
!= 0 || disc
.minor
!= 0
670 disc
.major
= major(rdev
);
671 disc
.minor
= minor(rdev
);
672 disc
.number
= mdi
.disk
.number
;
673 disc
.raid_disk
= mdi
.disk
.raid_disk
;
674 disc
.state
= mdi
.disk
.state
;
675 if (array
->state
& (1 << MD_SB_CLUSTERED
)) {
676 /* extra flags are needed when adding to a cluster as
677 * there are two cases to distinguish
679 if (dv
->disposition
== 'c')
680 disc
.state
|= (1 << MD_DISK_CANDIDATE
);
682 disc
.state
|= (1 << MD_DISK_CLUSTER_ADD
);
684 if (dv
->writemostly
== 1)
685 disc
.state
|= 1 << MD_DISK_WRITEMOSTLY
;
686 if (dv
->writemostly
== 2)
687 disc
.state
&= ~(1 << MD_DISK_WRITEMOSTLY
);
688 remove_partitions(tfd
);
689 if (update
|| dv
->writemostly
> 0) {
691 tfd
= dev_open(dv
->devname
, O_RDWR
);
693 pr_err("failed to open %s for superblock update during re-add\n", dv
->devname
);
697 if (dv
->writemostly
== 1)
698 rv
= dev_st
->ss
->update_super(
699 dev_st
, NULL
, "writemostly",
700 devname
, verbose
, 0, NULL
);
701 if (dv
->writemostly
== 2)
702 rv
= dev_st
->ss
->update_super(
703 dev_st
, NULL
, "readwrite",
704 devname
, verbose
, 0, NULL
);
706 rv
= dev_st
->ss
->update_super(
707 dev_st
, NULL
, update
,
708 devname
, verbose
, 0, NULL
);
710 rv
= dev_st
->ss
->store_super(dev_st
, tfd
);
713 pr_err("failed to update superblock during re-add\n");
717 /* don't even try if disk is marked as faulty */
719 if (ioctl(fd
, ADD_NEW_DISK
, &disc
) == 0) {
721 pr_err("re-added %s\n", dv
->devname
);
724 if (errno
== ENOMEM
|| errno
== EROFS
) {
725 pr_err("add new device failed for %s: %s\n",
726 dv
->devname
, strerror(errno
));
727 if (dv
->disposition
== 'M')
736 int Manage_add(int fd
, int tfd
, struct mddev_dev
*dv
,
737 struct supertype
*tst
, mdu_array_info_t
*array
,
738 int force
, int verbose
, char *devname
,
739 char *update
, unsigned long rdev
, unsigned long long array_size
,
742 unsigned long long ldsize
;
743 struct supertype
*dev_st
= NULL
;
745 mdu_disk_info_t disc
;
747 if (!get_dev_size(tfd
, dv
->devname
, &ldsize
)) {
748 if (dv
->disposition
== 'M')
754 if (tst
->ss
== &super0
&& ldsize
> 4ULL*1024*1024*1024*1024) {
755 /* More than 4TB is wasted on v0.90 */
757 pr_err("%s is larger than %s can effectively use.\n"
758 " Add --force is you really want to add this device.\n",
759 dv
->devname
, devname
);
762 pr_err("%s is larger than %s can effectively use.\n"
763 " Adding anyway as --force was given.\n",
764 dv
->devname
, devname
);
766 if (!tst
->ss
->external
&&
767 array
->major_version
== 0 &&
768 md_get_version(fd
)%100 < 2) {
769 if (ioctl(fd
, HOT_ADD_DISK
, rdev
)==0) {
771 pr_err("hot added %s\n",
776 pr_err("hot add failed for %s: %s\n",
777 dv
->devname
, strerror(errno
));
781 if (array
->not_persistent
== 0 || tst
->ss
->external
) {
783 /* need to find a sample superblock to copy, and
784 * a spare slot to use.
785 * For 'external' array (well, container based),
786 * We can just load the metadata for the array->
790 /* already loaded */;
791 else if (tst
->ss
->external
) {
792 tst
->ss
->load_container(tst
, fd
, NULL
);
793 } else for (j
= 0; j
< tst
->max_devs
; j
++) {
797 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
799 if (disc
.major
==0 && disc
.minor
==0)
801 if ((disc
.state
& 4)==0) /* sync */
803 /* Looks like a good device to try */
804 dev
= map_dev(disc
.major
, disc
.minor
, 1);
807 dfd
= dev_open(dev
, O_RDONLY
);
810 if (tst
->ss
->load_super(tst
, dfd
,
818 /* FIXME this is a bad test to be using */
819 if (!tst
->sb
&& (dv
->disposition
!= 'a'
820 && dv
->disposition
!= 'S')) {
821 /* we are re-adding a device to a
822 * completely dead array - have to depend
825 } else if (!tst
->sb
) {
826 pr_err("cannot load array metadata from %s\n", devname
);
830 /* Make sure device is large enough */
831 if (dv
->disposition
!= 'j' && /* skip size check for Journal */
833 tst
->ss
->avail_size(tst
, ldsize
/512, INVALID_SECTORS
) <
835 if (dv
->disposition
== 'M')
837 pr_err("%s not large enough to join array\n",
842 /* Possibly this device was recently part of
843 * the array and was temporarily removed, and
844 * is now being re-added. If so, we can
848 if (array
->not_persistent
==0) {
849 dev_st
= dup_super(tst
);
850 dev_st
->ss
->load_super(dev_st
, tfd
, NULL
);
852 if (dev_st
&& dev_st
->sb
&& dv
->disposition
!= 'S') {
853 int rv
= attempt_re_add(fd
, tfd
, dv
,
859 dev_st
->ss
->free_super(dev_st
);
863 if (dv
->disposition
== 'M') {
865 pr_err("--re-add for %s to %s is not possible\n",
866 dv
->devname
, devname
);
869 if (dv
->disposition
== 'A') {
870 pr_err("--re-add for %s to %s is not possible\n",
871 dv
->devname
, devname
);
874 if (array
->active_disks
< array
->raid_disks
) {
875 char *avail
= xcalloc(array
->raid_disks
, 1);
879 for (d
= 0; d
< MAX_DISKS
&& found
< array
->nr_disks
; d
++) {
881 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
883 if (disc
.major
== 0 && disc
.minor
== 0)
886 if (!(disc
.state
& (1<<MD_DISK_SYNC
)))
888 avail
[disc
.raid_disk
] = 1;
890 array_failed
= !enough(array
->level
, array
->raid_disks
,
891 array
->layout
, 1, avail
);
896 pr_err("%s has failed so using --add cannot work and might destroy\n",
898 pr_err("data on %s. You should stop the array and re-assemble it.\n",
903 /* non-persistent. Must ensure that new drive
904 * is at least array->size big.
906 if (ldsize
/512 < array_size
) {
907 pr_err("%s not large enough to join array\n",
912 /* committed to really trying this device now*/
913 remove_partitions(tfd
);
915 /* in 2.6.17 and earlier, version-1 superblocks won't
916 * use the number we write, but will choose a free number.
917 * we must choose the same free number, which requires
918 * starting at 'raid_disks' and counting up
920 for (j
= array
->raid_disks
; j
< tst
->max_devs
; j
++) {
922 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
924 if (disc
.major
==0 && disc
.minor
==0)
926 if (disc
.state
& 8) /* removed */
929 disc
.major
= major(rdev
);
930 disc
.minor
= minor(rdev
);
934 disc
.number
= raid_slot
;
937 /* only add journal to array that supports journaling */
938 if (dv
->disposition
== 'j') {
942 mdp
= sysfs_read(fd
, NULL
, GET_ARRAY_STATE
);
944 if (strncmp(mdp
->sysfs_array_state
, "readonly", 8) != 0) {
945 pr_err("%s is not readonly, cannot add journal.\n", devname
);
949 tst
->ss
->getinfo_super(tst
, &mdi
, NULL
);
950 if (mdi
.journal_device_required
== 0) {
951 pr_err("%s does not support journal device.\n", devname
);
957 if (array
->not_persistent
==0) {
959 if (dv
->disposition
== 'j')
960 disc
.state
|= (1 << MD_DISK_JOURNAL
) | (1 << MD_DISK_SYNC
);
961 if (dv
->writemostly
== 1)
962 disc
.state
|= 1 << MD_DISK_WRITEMOSTLY
;
963 dfd
= dev_open(dv
->devname
, O_RDWR
| O_EXCL
|O_DIRECT
);
964 if (tst
->ss
->add_to_super(tst
, &disc
, dfd
,
965 dv
->devname
, INVALID_SECTORS
))
967 if (tst
->ss
->write_init_super(tst
))
969 } else if (dv
->disposition
== 'A') {
970 /* this had better be raid1.
971 * As we are "--re-add"ing we must find a spare slot
974 char *used
= xcalloc(array
->raid_disks
, 1);
975 for (j
= 0; j
< tst
->max_devs
; j
++) {
976 mdu_disk_info_t disc2
;
978 if (ioctl(fd
, GET_DISK_INFO
, &disc2
))
980 if (disc2
.major
==0 && disc2
.minor
==0)
982 if (disc2
.state
& 8) /* removed */
984 if (disc2
.raid_disk
< 0)
986 if (disc2
.raid_disk
> array
->raid_disks
)
988 used
[disc2
.raid_disk
] = 1;
990 for (j
= 0 ; j
< array
->raid_disks
; j
++)
993 disc
.state
|= (1<<MD_DISK_SYNC
);
999 if (array
->state
& (1 << MD_SB_CLUSTERED
)) {
1000 if (dv
->disposition
== 'c')
1001 disc
.state
|= (1 << MD_DISK_CANDIDATE
);
1003 disc
.state
|= (1 << MD_DISK_CLUSTER_ADD
);
1006 if (dv
->writemostly
== 1)
1007 disc
.state
|= (1 << MD_DISK_WRITEMOSTLY
);
1008 if (tst
->ss
->external
) {
1010 * to an external metadata container */
1011 struct mdinfo new_mdi
;
1017 strcpy(devnm
, fd2devnm(fd
));
1019 container_fd
= open_dev_excl(devnm
);
1020 if (container_fd
< 0) {
1021 pr_err("add failed for %s: could not get exclusive access to container\n",
1023 tst
->ss
->free_super(tst
);
1027 Kill(dv
->devname
, NULL
, 0, -1, 0);
1028 dfd
= dev_open(dv
->devname
, O_RDWR
| O_EXCL
|O_DIRECT
);
1029 if (mdmon_running(tst
->container_devnm
))
1030 tst
->update_tail
= &tst
->updates
;
1031 if (tst
->ss
->add_to_super(tst
, &disc
, dfd
,
1032 dv
->devname
, INVALID_SECTORS
)) {
1034 close(container_fd
);
1037 if (tst
->update_tail
)
1038 flush_metadata_updates(tst
);
1040 tst
->ss
->sync_metadata(tst
);
1042 sra
= sysfs_read(container_fd
, NULL
, 0);
1044 pr_err("add failed for %s: sysfs_read failed\n",
1046 close(container_fd
);
1047 tst
->ss
->free_super(tst
);
1050 sra
->array
.level
= LEVEL_CONTAINER
;
1051 /* Need to set data_offset and component_size */
1052 tst
->ss
->getinfo_super(tst
, &new_mdi
, NULL
);
1053 new_mdi
.disk
.major
= disc
.major
;
1054 new_mdi
.disk
.minor
= disc
.minor
;
1055 new_mdi
.recovery_start
= 0;
1056 /* Make sure fds are closed as they are O_EXCL which
1057 * would block add_disk */
1058 tst
->ss
->free_super(tst
);
1059 if (sysfs_add_disk(sra
, &new_mdi
, 0) != 0) {
1060 pr_err("add new device to external metadata failed for %s\n", dv
->devname
);
1061 close(container_fd
);
1065 ping_monitor(devnm
);
1067 close(container_fd
);
1069 tst
->ss
->free_super(tst
);
1070 if (ioctl(fd
, ADD_NEW_DISK
, &disc
)) {
1071 if (dv
->disposition
== 'j')
1072 pr_err("Failed to hot add %s as journal, "
1073 "please try restart %s.\n", dv
->devname
, devname
);
1075 pr_err("add new device failed for %s as %d: %s\n",
1076 dv
->devname
, j
, strerror(errno
));
1079 if (dv
->disposition
== 'j') {
1080 pr_err("Journal added successfully, making %s read-write\n", devname
);
1081 if (Manage_ro(devname
, fd
, -1))
1082 pr_err("Failed to make %s read-write\n", devname
);
1087 pr_err("added %s\n", dv
->devname
);
1091 int Manage_remove(struct supertype
*tst
, int fd
, struct mddev_dev
*dv
,
1092 int sysfd
, unsigned long rdev
, int verbose
, char *devname
)
1097 if (tst
->ss
->external
) {
1098 /* To remove a device from a container, we must
1099 * check that it isn't in use in an array.
1100 * This involves looking in the 'holders'
1101 * directory - there must be just one entry,
1103 * To ensure that it doesn't get used as a
1104 * hot spare while we are checking, we
1105 * get an O_EXCL open on the container
1109 strcpy(devnm
, fd2devnm(fd
));
1110 lfd
= open_dev_excl(devnm
);
1112 pr_err("Cannot get exclusive access to container - odd\n");
1115 /* We may not be able to check on holders in
1116 * sysfs, either because we don't have the dev num
1117 * (rdev == 0) or because the device has been detached
1118 * and the 'holders' directory no longer exists
1119 * (ret == -1). In that case, assume it is OK to
1125 ret
= sysfs_unique_holder(devnm
, rdev
);
1127 pr_err("%s is not a member, cannot remove.\n",
1133 pr_err("%s is still in use, cannot remove.\n",
1139 /* FIXME check that it is a current member */
1141 /* device has been removed and we don't know
1142 * the major:minor number
1144 int n
= write(sysfd
, "remove", 6);
1150 err
= ioctl(fd
, HOT_REMOVE_DISK
, rdev
);
1151 if (err
&& errno
== ENODEV
) {
1152 /* Old kernels rejected this if no personality
1154 struct mdinfo
*sra
= sysfs_read(fd
, NULL
, GET_DEVS
);
1155 struct mdinfo
*dv
= NULL
;
1158 for ( ; dv
; dv
=dv
->next
)
1159 if (dv
->disk
.major
== (int)major(rdev
) &&
1160 dv
->disk
.minor
== (int)minor(rdev
))
1163 err
= sysfs_set_str(sra
, dv
,
1172 pr_err("hot remove failed for %s: %s\n", dv
->devname
,
1178 if (tst
->ss
->external
) {
1180 * Before dropping our exclusive open we make an
1181 * attempt at preventing mdmon from seeing an
1182 * 'add' event before reconciling this 'remove'
1185 char *devnm
= fd2devnm(fd
);
1188 pr_err("unable to get container name\n");
1192 ping_manager(devnm
);
1197 pr_err("hot removed %s from %s\n",
1198 dv
->devname
, devname
);
1202 int Manage_replace(struct supertype
*tst
, int fd
, struct mddev_dev
*dv
,
1203 unsigned long rdev
, int verbose
, char *devname
)
1205 struct mdinfo
*mdi
, *di
;
1206 if (tst
->ss
->external
) {
1207 pr_err("--replace only supported for native metadata (0.90 or 1.x)\n");
1210 /* Need to find the device in sysfs and add 'want_replacement' to the
1213 mdi
= sysfs_read(fd
, NULL
, GET_DEVS
);
1214 if (!mdi
|| !mdi
->devs
) {
1215 pr_err("Cannot find status of %s to enable replacement - strange\n",
1219 for (di
= mdi
->devs
; di
; di
= di
->next
)
1220 if (di
->disk
.major
== (int)major(rdev
) &&
1221 di
->disk
.minor
== (int)minor(rdev
))
1225 if (di
->disk
.raid_disk
< 0) {
1226 pr_err("%s is not active and so cannot be replaced.\n",
1231 rv
= sysfs_set_str(mdi
, di
,
1232 "state", "want_replacement");
1235 pr_err("Failed to request replacement for %s\n",
1240 pr_err("Marked %s (device %d in %s) for replacement\n",
1241 dv
->devname
, di
->disk
.raid_disk
, devname
);
1242 /* If there is a matching 'with', we need to tell it which
1245 while (dv
&& dv
->disposition
!= 'W')
1248 dv
->disposition
= 'w';
1249 dv
->used
= di
->disk
.raid_disk
;
1254 pr_err("%s not found in %s so cannot --replace it\n",
1255 dv
->devname
, devname
);
1259 int Manage_with(struct supertype
*tst
, int fd
, struct mddev_dev
*dv
,
1260 unsigned long rdev
, int verbose
, char *devname
)
1262 struct mdinfo
*mdi
, *di
;
1263 /* try to set 'slot' for 'rdev' in 'fd' to 'dv->used' */
1264 mdi
= sysfs_read(fd
, NULL
, GET_DEVS
|GET_STATE
);
1265 if (!mdi
|| !mdi
->devs
) {
1266 pr_err("Cannot find status of %s to enable replacement - strange\n",
1270 for (di
= mdi
->devs
; di
; di
= di
->next
)
1271 if (di
->disk
.major
== (int)major(rdev
) &&
1272 di
->disk
.minor
== (int)minor(rdev
))
1276 if (di
->disk
.state
& (1<<MD_DISK_FAULTY
)) {
1277 pr_err("%s is faulty and cannot be a replacement\n",
1282 if (di
->disk
.raid_disk
>= 0) {
1283 pr_err("%s is active and cannot be a replacement\n",
1288 rv
= sysfs_set_num(mdi
, di
,
1292 pr_err("Failed to set %s as preferred replacement.\n",
1297 pr_err("Marked %s in %s as replacement for device %d\n",
1298 dv
->devname
, devname
, dv
->used
);
1302 pr_err("%s not found in %s so cannot make it preferred replacement\n",
1303 dv
->devname
, devname
);
1307 int Manage_subdevs(char *devname
, int fd
,
1308 struct mddev_dev
*devlist
, int verbose
, int test
,
1309 char *update
, int force
)
1311 /* Do something to each dev.
1313 * 'a' - add the device
1315 * If that fails EINVAL, try ADD_NEW_DISK
1316 * 'S' - add the device as a spare - don't try re-add
1317 * 'j' - add the device as a journal device
1318 * 'A' - re-add the device
1319 * 'r' - remove the device: HOT_REMOVE_DISK
1320 * device can be 'faulty' or 'detached' in which case all
1321 * matching devices are removed.
1322 * 'f' - set the device faulty SET_DISK_FAULTY
1323 * device can be 'detached' in which case any device that
1324 * is inaccessible will be marked faulty.
1325 * 'R' - mark this device as wanting replacement.
1326 * 'W' - this device is added if necessary and activated as
1327 * a replacement for a previous 'R' device.
1329 * 'w' - 'W' will be changed to 'w' when it is paired with
1330 * a 'R' device. If a 'W' is found while walking the list
1331 * it must be unpaired, and is an error.
1332 * 'M' - this is created by a 'missing' target. It is a slight
1334 * 'F' - Another variant of 'A', where the device was faulty
1335 * so must be removed from the array first.
1336 * 'c' - confirm the device as found (for clustered environments)
1338 * For 'f' and 'r', the device can also be a kernel-internal
1339 * name such as 'sdb'.
1341 mdu_array_info_t array
;
1342 unsigned long long array_size
;
1343 struct mddev_dev
*dv
;
1345 struct supertype
*tst
;
1346 char *subarray
= NULL
;
1348 int count
= 0; /* number of actions taken */
1350 struct mdinfo devinfo
;
1355 if (ioctl(fd
, GET_ARRAY_INFO
, &array
)) {
1356 pr_err("Cannot get array info for %s\n",
1360 sysfs_init(&info
, fd
, NULL
);
1362 /* array.size is only 32 bits and may be truncated.
1363 * So read from sysfs if possible, and record number of sectors
1366 array_size
= get_component_size(fd
);
1367 if (array_size
<= 0)
1368 array_size
= array
.size
* 2;
1370 tst
= super_by_fd(fd
, &subarray
);
1372 pr_err("unsupport array - version %d.%d\n",
1373 array
.major_version
, array
.minor_version
);
1377 for (dv
= devlist
; dv
; dv
= dv
->next
) {
1378 unsigned long rdev
= 0; /* device to add/remove etc */
1383 if (dv
->disposition
== 'c') {
1384 rv
= parse_cluster_confirm_arg(dv
->devname
,
1388 pr_err("Could not get the devname of cluster\n");
1393 if (strcmp(dv
->devname
, "failed") == 0 ||
1394 strcmp(dv
->devname
, "faulty") == 0) {
1395 if (dv
->disposition
!= 'A'
1396 && dv
->disposition
!= 'r') {
1397 pr_err("%s only meaningful with -r or --re-add, not -%c\n",
1398 dv
->devname
, dv
->disposition
);
1401 add_faulty(dv
, fd
, (dv
->disposition
== 'A'
1405 if (strcmp(dv
->devname
, "detached") == 0) {
1406 if (dv
->disposition
!= 'r' && dv
->disposition
!= 'f') {
1407 pr_err("%s only meaningful with -r of -f, not -%c\n",
1408 dv
->devname
, dv
->disposition
);
1411 add_detached(dv
, fd
, dv
->disposition
);
1415 if (strcmp(dv
->devname
, "missing") == 0) {
1416 struct mddev_dev
*add_devlist
= NULL
;
1417 struct mddev_dev
**dp
;
1418 if (dv
->disposition
== 'c') {
1419 rv
= ioctl(fd
, CLUSTERED_DISK_NACK
, NULL
);
1423 if (dv
->disposition
!= 'A') {
1424 pr_err("'missing' only meaningful with --re-add\n");
1427 add_devlist
= conf_get_devs();
1428 if (add_devlist
== NULL
) {
1429 pr_err("no devices to scan for missing members.");
1432 for (dp
= &add_devlist
; *dp
; dp
= & (*dp
)->next
)
1433 /* 'M' (for 'missing') is like 'A' without errors */
1434 (*dp
)->disposition
= 'M';
1436 dv
->next
= add_devlist
;
1440 if (strncmp(dv
->devname
, "set-", 4) == 0 &&
1441 strlen(dv
->devname
) == 5) {
1444 if (dv
->disposition
!= 'r' &&
1445 dv
->disposition
!= 'f') {
1446 pr_err("'%s' only meaningful with -r or -f\n",
1450 if (array
.level
!= 10) {
1451 pr_err("'%s' only meaningful with RAID10 arrays\n",
1455 copies
= ((array
.layout
& 0xff) *
1456 ((array
.layout
>> 8) & 0xff));
1457 if (array
.raid_disks
% copies
!= 0 ||
1458 dv
->devname
[4] < 'A' ||
1459 dv
->devname
[4] >= 'A' + copies
||
1461 pr_err("'%s' not meaningful with this array\n",
1465 add_set(dv
, fd
, dv
->devname
[4]);
1469 if (strchr(dv
->devname
, '/') == NULL
&&
1470 strchr(dv
->devname
, ':') == NULL
&&
1471 strlen(dv
->devname
) < 50) {
1472 /* Assume this is a kernel-internal name like 'sda1' */
1475 if (dv
->disposition
!= 'r' && dv
->disposition
!= 'f') {
1476 pr_err("%s only meaningful with -r or -f, not -%c\n",
1477 dv
->devname
, dv
->disposition
);
1481 sprintf(dname
, "dev-%s", dv
->devname
);
1482 sysfd
= sysfs_open(fd2devnm(fd
), dname
, "block/dev");
1485 if (sysfs_fd_get_str(sysfd
, dn
, 20) > 0 &&
1486 sscanf(dn
, "%d:%d", &mj
,&mn
) == 2) {
1487 rdev
= makedev(mj
,mn
);
1494 sysfd
= sysfs_open(fd2devnm(fd
), dname
, "state");
1496 pr_err("%s does not appear to be a component of %s\n",
1497 dv
->devname
, devname
);
1501 } else if ((dv
->disposition
== 'r' || dv
->disposition
== 'f')
1502 && get_maj_min(dv
->devname
, &mj
, &mn
)) {
1503 /* for 'fail' and 'remove', the device might
1506 rdev
= makedev(mj
, mn
);
1509 tfd
= dev_open(dv
->devname
, O_RDONLY
);
1513 int open_err
= errno
;
1514 if (stat(dv
->devname
, &stb
) != 0) {
1515 pr_err("Cannot find %s: %s\n",
1516 dv
->devname
, strerror(errno
));
1519 if ((stb
.st_mode
& S_IFMT
) != S_IFBLK
) {
1520 if (dv
->disposition
== 'M')
1521 /* non-fatal. Also improbable */
1523 pr_err("%s is not a block device.\n",
1527 if (dv
->disposition
== 'r')
1528 /* Be happy, the stat worked, that is
1529 * enough for --remove
1533 if (dv
->disposition
== 'M')
1536 pr_err("Cannot open %s: %s\n",
1537 dv
->devname
, strerror(open_err
));
1543 switch(dv
->disposition
){
1545 pr_err("internal error - devmode[%s]=%d\n",
1546 dv
->devname
, dv
->disposition
);
1549 case 'S': /* --add-spare */
1550 case 'j': /* --add-journal */
1552 case 'M': /* --re-add missing */
1553 case 'F': /* --re-add faulty */
1554 case 'c': /* --cluster-confirm */
1555 /* add the device */
1557 pr_err("Cannot add disks to a \'member\' array, perform this operation on the parent container\n");
1561 /* Let's first try to write re-add to sysfs */
1563 (dv
->disposition
== 'A' || dv
->disposition
== 'F')) {
1564 sysfs_init_dev(&devinfo
, rdev
);
1565 if (sysfs_set_str(&info
, &devinfo
, "state", "re-add") == 0) {
1566 pr_err("re-add %s to %s succeed\n",
1567 dv
->devname
, info
.sys_name
);
1572 if (dv
->disposition
== 'F')
1573 /* Need to remove first */
1574 ioctl(fd
, HOT_REMOVE_DISK
, rdev
);
1575 /* Make sure it isn't in use (in 2.6 or later) */
1576 tfd
= dev_open(dv
->devname
, O_RDONLY
|O_EXCL
);
1578 /* We know no-one else is using it. We'll
1579 * need non-exclusive access to add it, so
1583 tfd
= dev_open(dv
->devname
, O_RDONLY
);
1586 if (dv
->disposition
== 'M')
1588 pr_err("Cannot open %s: %s\n",
1589 dv
->devname
, strerror(errno
));
1593 if (sysfs_freeze_array(&info
) == 1)
1598 rv
= Manage_add(fd
, tfd
, dv
, tst
, &array
,
1599 force
, verbose
, devname
, update
,
1600 rdev
, array_size
, raid_slot
);
1612 pr_err("Cannot remove disks from a \'member\' array, perform this operation on the parent container\n");
1615 rv
= Manage_remove(tst
, fd
, dv
, sysfd
,
1627 case 'f': /* set faulty */
1628 /* FIXME check current member */
1629 if ((sysfd
>= 0 && write(sysfd
, "faulty", 6) != 6) ||
1630 (sysfd
< 0 && ioctl(fd
, SET_DISK_FAULTY
,
1634 pr_err("set device faulty failed for %s: %s\n",
1635 dv
->devname
, strerror(errno
));
1645 pr_err("set %s faulty in %s\n",
1646 dv
->devname
, devname
);
1648 case 'R': /* Mark as replaceable */
1650 pr_err("Cannot replace disks in a \'member\' array, perform this operation on the parent container\n");
1654 if (sysfs_freeze_array(&info
) == 1)
1659 rv
= Manage_replace(tst
, fd
, dv
,
1668 case 'W': /* --with device that doesn't match */
1669 pr_err("No matching --replace device for --with %s\n",
1672 case 'w': /* --with device which was matched */
1673 rv
= Manage_with(tst
, fd
, dv
,
1674 rdev
, verbose
, devname
);
1681 sysfs_set_str(&info
, NULL
, "sync_action","idle");
1682 if (test
&& count
== 0)
1688 sysfs_set_str(&info
, NULL
, "sync_action","idle");
1689 return !test
&& busy
? 2 : 1;
1692 int autodetect(void)
1694 /* Open any md device, and issue the RAID_AUTORUN ioctl */
1696 int fd
= dev_open("9:0", O_RDONLY
);
1698 if (ioctl(fd
, RAID_AUTORUN
, 0) == 0)
1705 int Update_subarray(char *dev
, char *subarray
, char *update
, struct mddev_ident
*ident
, int verbose
)
1707 struct supertype supertype
, *st
= &supertype
;
1710 memset(st
, 0, sizeof(*st
));
1712 fd
= open_subarray(dev
, subarray
, st
, verbose
< 0);
1716 if (!st
->ss
->update_subarray
) {
1718 pr_err("Operation not supported for %s metadata\n",
1723 if (mdmon_running(st
->devnm
))
1724 st
->update_tail
= &st
->updates
;
1726 rv
= st
->ss
->update_subarray(st
, subarray
, update
, ident
);
1730 pr_err("Failed to update %s of subarray-%s in %s\n",
1731 update
, subarray
, dev
);
1732 } else if (st
->update_tail
)
1733 flush_metadata_updates(st
);
1735 st
->ss
->sync_metadata(st
);
1737 if (rv
== 0 && strcmp(update
, "name") == 0 && verbose
>= 0)
1738 pr_err("Updated subarray-%s name from %s, UUIDs may have changed\n",
1742 st
->ss
->free_super(st
);
1748 /* Move spare from one array to another If adding to destination array fails
1749 * add back to original array.
1750 * Returns 1 on success, 0 on failure */
1751 int move_spare(char *from_devname
, char *to_devname
, dev_t devid
)
1753 struct mddev_dev devlist
;
1756 /* try to remove and add */
1757 int fd1
= open(to_devname
, O_RDONLY
);
1758 int fd2
= open(from_devname
, O_RDONLY
);
1760 if (fd1
< 0 || fd2
< 0) {
1761 if (fd1
>=0) close(fd1
);
1762 if (fd2
>=0) close(fd2
);
1766 devlist
.next
= NULL
;
1768 devlist
.writemostly
= 0;
1769 devlist
.devname
= devname
;
1770 sprintf(devname
, "%d:%d", major(devid
), minor(devid
));
1772 devlist
.disposition
= 'r';
1773 if (Manage_subdevs(from_devname
, fd2
, &devlist
, -1, 0, NULL
, 0) == 0) {
1774 devlist
.disposition
= 'a';
1775 if (Manage_subdevs(to_devname
, fd1
, &devlist
, -1, 0, NULL
, 0) == 0) {
1776 /* make sure manager is aware of changes */
1777 ping_manager(to_devname
);
1778 ping_manager(from_devname
);
1783 else Manage_subdevs(from_devname
, fd2
, &devlist
, -1, 0, NULL
, 0);