]>
git.ipfire.org Git - thirdparty/mdadm.git/blob - Manage.c
467efb73e367e330de1594ad03c9d116eee0b856
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 int Manage_ro(char *devname
, int fd
, int readonly
)
32 /* switch to readonly or rw
35 * first check that array is runing
36 * use RESTART_ARRAY_RW or STOP_ARRAY_RO
42 /* If this is an externally-managed array, we need to modify the
43 * metadata_version so that mdmon doesn't undo our change.
45 mdi
= sysfs_read(fd
, NULL
, GET_LEVEL
|GET_VERSION
);
47 mdi
->array
.major_version
== -1 &&
48 is_subarray(mdi
->text_version
)) {
50 strcpy(vers
, "external:");
51 strcat(vers
, mdi
->text_version
);
54 /* We set readonly ourselves. */
56 sysfs_set_str(mdi
, NULL
, "metadata_version", vers
);
59 rv
= sysfs_set_str(mdi
, NULL
, "array_state", "readonly");
62 pr_err("failed to set readonly for %s: %s\n",
63 devname
, strerror(errno
));
65 vers
[9] = mdi
->text_version
[0];
66 sysfs_set_str(mdi
, NULL
, "metadata_version", vers
);
72 /* We cannot set read/write - must signal mdmon */
74 sysfs_set_str(mdi
, NULL
, "metadata_version", vers
);
76 cp
= strchr(vers
+10, '/');
79 ping_monitor(vers
+10);
80 if (mdi
->array
.level
<= 0)
81 sysfs_set_str(mdi
, NULL
, "array_state", "active");
86 if (!md_array_active(fd
)) {
87 pr_err("%s does not appear to be active.\n", devname
);
93 if (ioctl(fd
, STOP_ARRAY_RO
, NULL
)) {
94 pr_err("failed to set readonly for %s: %s\n",
95 devname
, strerror(errno
));
99 } else if (readonly
< 0) {
100 if (ioctl(fd
, RESTART_ARRAY_RW
, NULL
)) {
101 pr_err("failed to set writable for %s: %s\n",
102 devname
, strerror(errno
));
112 static void remove_devices(char *devnm
, char *path
)
115 * Remove names at 'path' - possibly with
116 * partition suffixes - which link to the 'standard'
117 * name for devnm. These were probably created
118 * by mdadm when the array was assembled.
131 sprintf(base
, "/dev/%s", devnm
);
132 be
= base
+ strlen(base
);
134 path2
= xmalloc(strlen(path
)+20);
136 pe
= path2
+ strlen(path2
);
138 for (part
= 0; part
< 16; part
++) {
140 sprintf(be
, "p%d", part
);
143 sprintf(pe
, "p%d", part
);
145 sprintf(pe
, "%d", part
);
147 n
= readlink(path2
, link
, sizeof(link
));
148 if (n
> 0 && (int)strlen(base
) == n
&&
149 strncmp(link
, base
, n
) == 0)
155 int Manage_run(char *devname
, int fd
, struct context
*c
)
157 /* Run the array. Array must already be configured
164 pr_err("Cannot find %s in sysfs!!\n", devname
);
168 return IncrementalScan(c
, nm
);
171 int Manage_stop(char *devname
, int fd
, int verbose
, int will_retry
)
173 /* Stop the array. Array must already be configured
174 * 'will_retry' means that error messages are not wanted.
177 struct map_ent
*map
= NULL
;
184 unsigned long long rd1
, rd2
;
186 if (will_retry
&& verbose
== 0)
189 strcpy(devnm
, fd2devnm(fd
));
190 /* Get EXCL access first. If this fails, then attempting
191 * to stop is probably a bad idea.
193 mdi
= sysfs_read(fd
, NULL
, GET_LEVEL
|GET_COMPONENT
|GET_VERSION
);
194 if (mdi
&& is_subarray(mdi
->text_version
)) {
196 strncpy(container
, mdi
->text_version
+1, sizeof(container
));
197 container
[sizeof(container
)-1] = 0;
198 sl
= strchr(container
, '/');
205 while (((fd
= ((devname
[0] == '/')
206 ?open(devname
, O_RDONLY
|O_EXCL
)
207 :open_dev_flags(devnm
, O_RDONLY
|O_EXCL
))) < 0
208 || strcmp(fd2devnm(fd
), devnm
) != 0)
210 && mdmon_running(container
)
212 /* Can't open, so something might be wrong. However it
213 * is a container, so we might be racing with mdmon, so
218 flush_mdmon(container
);
221 if (fd
< 0 || strcmp(fd2devnm(fd
), devnm
) != 0) {
225 pr_err("Cannot get exclusive access to %s:Perhaps a running process, mounted filesystem or active volume group?\n",
229 /* If this is an mdmon managed array, just write 'inactive'
230 * to the array state and let mdmon clear up.
233 mdi
->array
.level
> 0 &&
234 is_subarray(mdi
->text_version
)) {
236 /* This is mdmon managed. */
239 /* As we had an O_EXCL open, any use of the device
240 * which blocks STOP_ARRAY is probably a transient use,
241 * so it is reasonable to retry for a while - 5 seconds.
245 (err
= sysfs_set_str(mdi
, NULL
,
254 pr_err("failed to stop array %s: %s\n",
255 devname
, strerror(errno
));
260 /* Give monitor a chance to act */
261 ping_monitor(mdi
->text_version
);
263 fd
= open_dev_excl(devnm
);
266 pr_err("failed to completely stop %s: Device is busy\n",
272 mdi
->array
.major_version
== -1 &&
273 mdi
->array
.minor_version
== -2 &&
274 !is_subarray(mdi
->text_version
)) {
275 struct mdstat_ent
*mds
, *m
;
276 /* container, possibly mdmon-managed.
277 * Make sure mdmon isn't opening it, which
278 * would interfere with the 'stop'
280 ping_monitor(mdi
->sys_name
);
282 /* now check that there are no existing arrays
283 * which are members of this array
285 mds
= mdstat_read(0, 0);
286 for (m
= mds
; m
; m
= m
->next
)
287 if (m
->metadata_version
&&
288 strncmp(m
->metadata_version
, "external:", 9)==0 &&
289 metadata_container_matches(m
->metadata_version
+9,
292 pr_err("Cannot stop container %s: member %s still active\n",
300 /* If the array is undergoing a reshape which changes the number
301 * of devices, then it would be nice to stop it at a point where
302 * it has completed a full number of stripes in both old and
303 * new layouts as this will allow the reshape to be reverted.
304 * So if 'sync_action' is "reshape" and 'raid_disks' shows two
305 * different numbers, then
307 * - set sync_max to next multiple of both data_disks and
308 * chunk sizes (or next but one)
310 * - wait on 'sync_completed' for that point to be reached.
312 if (mdi
&& (mdi
->array
.level
>= 4 && mdi
->array
.level
<= 6) &&
313 sysfs_attribute_available(mdi
, NULL
, "sync_action") &&
314 sysfs_attribute_available(mdi
, NULL
, "reshape_direction") &&
315 sysfs_get_str(mdi
, NULL
, "sync_action", buf
, 20) > 0 &&
316 strcmp(buf
, "reshape\n") == 0 &&
317 sysfs_get_two(mdi
, NULL
, "raid_disks", &rd1
, &rd2
) == 2) {
318 unsigned long long position
, curr
;
319 unsigned long long chunk1
, chunk2
;
320 unsigned long long rddiv
, chunkdiv
;
321 unsigned long long sectors
;
322 unsigned long long sync_max
, old_sync_max
;
323 unsigned long long completed
;
329 while (rd1
> rd2
&& delay
> 0 &&
330 sysfs_get_ll(mdi
, NULL
, "sync_max", &old_sync_max
) == 0) {
331 /* must be in the critical section - wait a bit */
336 if (sysfs_set_str(mdi
, NULL
, "sync_action", "frozen") != 0)
338 /* Array is frozen */
340 rd1
-= mdi
->array
.level
== 6 ? 2 : 1;
341 rd2
-= mdi
->array
.level
== 6 ? 2 : 1;
342 sysfs_get_str(mdi
, NULL
, "reshape_direction", buf
, sizeof(buf
));
343 if (strncmp(buf
, "back", 4) == 0)
345 if (sysfs_get_ll(mdi
, NULL
, "reshape_position", &position
) != 0) {
346 /* reshape must have finished now */
347 sysfs_set_str(mdi
, NULL
, "sync_action", "idle");
350 sysfs_get_two(mdi
, NULL
, "chunk_size", &chunk1
, &chunk2
);
353 rddiv
= GCD(rd1
, rd2
);
354 chunkdiv
= GCD(chunk1
, chunk2
);
355 sectors
= (chunk1
/chunkdiv
) * chunk2
* (rd1
/rddiv
) * rd2
;
358 /* Need to subtract 'reshape_position' from
359 * array size to get equivalent of sync_max.
360 * Size calculation based on raid5_size in kernel.
362 unsigned long long size
= mdi
->component_size
;
365 /* rd1 must be smaller */
366 /* Reshape may have progressed further backwards than
367 * recorded, so target even further back (hence "-1")
369 position
= (position
/ sectors
- 1) * sectors
;
370 /* rd1 is always the conversion factor between 'sync'
371 * position and 'reshape' position.
372 * We read 1 "new" stripe worth of data from where-ever,
373 * and when write out that full stripe.
375 sync_max
= size
- position
/rd1
;
377 /* Reshape will very likely be beyond position, and it may
378 * be too late to stop at '+1', so aim for '+2'
380 position
= (position
/ sectors
+ 2) * sectors
;
381 sync_max
= position
/rd1
;
383 if (sysfs_get_ll(mdi
, NULL
, "sync_max", &old_sync_max
) < 0)
384 old_sync_max
= mdi
->component_size
;
385 /* Must not advance sync_max as that could confuse
386 * the reshape monitor */
387 if (sync_max
< old_sync_max
)
388 sysfs_set_num(mdi
, NULL
, "sync_max", sync_max
);
389 sysfs_set_str(mdi
, NULL
, "sync_action", "idle");
391 /* That should have set things going again. Now we
392 * wait a little while (3 second max) for sync_completed
393 * to reach the target.
394 * The reshape process can block for 500msec if
395 * the sync speed limit is hit, so we need to wait
396 * a lot longer than that. 1 second is usually
400 scfd
= sysfs_open(mdi
->sys_name
, NULL
, "sync_completed");
401 while (scfd
>= 0 && delay
> 0 && old_sync_max
> 0) {
402 unsigned long long max_completed
;
403 sysfs_get_ll(mdi
, NULL
, "reshape_position", &curr
);
404 sysfs_fd_get_str(scfd
, buf
, sizeof(buf
));
405 if (strncmp(buf
, "none", 4) == 0) {
406 /* Either reshape has aborted, or hasn't
407 * quite started yet. Wait a bit and
408 * check 'sync_action' to see.
411 sysfs_get_str(mdi
, NULL
, "sync_action", buf
, sizeof(buf
));
412 if (strncmp(buf
, "reshape", 7) != 0)
416 if (sysfs_fd_get_two(scfd
, &completed
,
417 &max_completed
) == 2 &&
418 /* 'completed' sometimes reads as max-uulong */
419 completed
< max_completed
&&
420 (completed
> sync_max
||
421 (completed
== sync_max
&& curr
!= position
))) {
422 while (completed
> sync_max
) {
423 sync_max
+= sectors
/ rd1
;
429 if (sync_max
< old_sync_max
)
430 sysfs_set_num(mdi
, NULL
, "sync_max", sync_max
);
433 if (!backwards
&& curr
>= position
)
435 if (backwards
&& curr
<= position
)
437 sysfs_wait(scfd
, &delay
);
445 /* As we have an O_EXCL open, any use of the device
446 * which blocks STOP_ARRAY is probably a transient use,
447 * so it is reasonable to retry for a while - 5 seconds.
450 while (count
&& fd
>= 0
451 && (err
= ioctl(fd
, STOP_ARRAY
, NULL
)) < 0
456 if (fd
>= 0 && err
) {
458 pr_err("failed to stop array %s: %s\n",
459 devname
, strerror(errno
));
461 cont_err("Perhaps a running process, mounted filesystem or active volume group?\n");
467 if (get_linux_version() < 2006028) {
468 /* prior to 2.6.28, KOBJ_CHANGE was not sent when an md array
469 * was stopped, so We'll do it here just to be sure. Drop any
470 * partitions as well...
473 ioctl(fd
, BLKRRPART
, 0);
475 sysfs_uevent(mdi
, "change");
478 if (devnm
[0] && use_udev()) {
479 struct map_ent
*mp
= map_by_devnm(&map
, devnm
);
480 remove_devices(devnm
, mp
? mp
->path
: NULL
);
484 pr_err("stopped %s\n", devname
);
486 map_remove(&map
, devnm
);
494 static struct mddev_dev
*add_one(struct mddev_dev
*dv
, char *name
, char disp
)
496 struct mddev_dev
*new;
497 new = xmalloc(sizeof(*new));
498 memset(new, 0, sizeof(*new));
499 new->devname
= xstrdup(name
);
500 new->disposition
= disp
;
501 new->next
= dv
->next
;
506 static void add_faulty(struct mddev_dev
*dv
, int fd
, char disp
)
508 mdu_array_info_t array
;
509 mdu_disk_info_t disk
;
513 if (md_get_array_info(fd
, &array
) != 0)
516 remaining_disks
= array
.nr_disks
;
517 for (i
= 0; i
< MAX_DISKS
&& remaining_disks
> 0; i
++) {
520 if (md_get_disk_info(fd
, &disk
) != 0)
522 if (disk
.major
== 0 && disk
.minor
== 0)
525 if ((disk
.state
& 1) == 0) /* not faulty */
527 sprintf(buf
, "%d:%d", disk
.major
, disk
.minor
);
528 dv
= add_one(dv
, buf
, disp
);
532 static void add_detached(struct mddev_dev
*dv
, int fd
, char disp
)
534 mdu_array_info_t array
;
535 mdu_disk_info_t disk
;
539 if (md_get_array_info(fd
, &array
) != 0)
542 remaining_disks
= array
.nr_disks
;
543 for (i
= 0; i
< MAX_DISKS
&& remaining_disks
> 0; i
++) {
547 if (md_get_disk_info(fd
, &disk
) != 0)
549 if (disk
.major
== 0 && disk
.minor
== 0)
552 if (disp
== 'f' && (disk
.state
& 1) != 0) /* already faulty */
554 sprintf(buf
, "%d:%d", disk
.major
, disk
.minor
);
555 sfd
= dev_open(buf
, O_RDONLY
);
562 /* Probably not detached */
564 dv
= add_one(dv
, buf
, disp
);
568 static void add_set(struct mddev_dev
*dv
, int fd
, char set_char
)
570 mdu_array_info_t array
;
571 mdu_disk_info_t disk
;
576 if (md_get_array_info(fd
, &array
) != 0)
578 if (array
.level
!= 10)
580 copies
= ((array
.layout
& 0xff) *
581 ((array
.layout
>> 8) & 0xff));
582 if (array
.raid_disks
% copies
)
585 remaining_disks
= array
.nr_disks
;
586 for (i
= 0; i
< MAX_DISKS
&& remaining_disks
> 0; i
++) {
589 if (md_get_disk_info(fd
, &disk
) != 0)
591 if (disk
.major
== 0 && disk
.minor
== 0)
594 set
= disk
.raid_disk
% copies
;
595 if (set_char
!= set
+ 'A')
597 sprintf(buf
, "%d:%d", disk
.major
, disk
.minor
);
598 dv
= add_one(dv
, buf
, dv
->disposition
);
602 int attempt_re_add(int fd
, int tfd
, struct mddev_dev
*dv
,
603 struct supertype
*dev_st
, struct supertype
*tst
,
605 char *update
, char *devname
, int verbose
,
606 mdu_array_info_t
*array
)
612 dev_st
->ss
->getinfo_super(dev_st
, &mdi
, NULL
);
613 dev_st
->ss
->uuid_from_super(dev_st
, ouuid
);
615 tst
->ss
->uuid_from_super(tst
, duuid
);
617 /* Assume uuid matches: kernel will check */
618 memcpy(duuid
, ouuid
, sizeof(ouuid
));
619 if ((mdi
.disk
.state
& (1<<MD_DISK_ACTIVE
)) &&
620 !(mdi
.disk
.state
& (1<<MD_DISK_FAULTY
)) &&
621 memcmp(duuid
, ouuid
, sizeof(ouuid
))==0) {
622 /* Looks like it is worth a
623 * try. Need to make sure
624 * kernel will accept it
627 mdu_disk_info_t disc
;
628 /* re-add doesn't work for version-1 superblocks
631 if (array
->major_version
== 1 &&
632 get_linux_version() <= 2006018)
634 disc
.number
= mdi
.disk
.number
;
635 if (md_get_disk_info(fd
, &disc
) != 0 ||
636 disc
.major
!= 0 || disc
.minor
!= 0)
638 disc
.major
= major(rdev
);
639 disc
.minor
= minor(rdev
);
640 disc
.number
= mdi
.disk
.number
;
641 disc
.raid_disk
= mdi
.disk
.raid_disk
;
642 disc
.state
= mdi
.disk
.state
;
643 if (array
->state
& (1 << MD_SB_CLUSTERED
)) {
644 /* extra flags are needed when adding to a cluster as
645 * there are two cases to distinguish
647 if (dv
->disposition
== 'c')
648 disc
.state
|= (1 << MD_DISK_CANDIDATE
);
650 disc
.state
|= (1 << MD_DISK_CLUSTER_ADD
);
652 if (dv
->writemostly
== FlagSet
)
653 disc
.state
|= 1 << MD_DISK_WRITEMOSTLY
;
654 if (dv
->writemostly
== FlagClear
)
655 disc
.state
&= ~(1 << MD_DISK_WRITEMOSTLY
);
656 if (dv
->failfast
== FlagSet
)
657 disc
.state
|= 1 << MD_DISK_FAILFAST
;
658 if (dv
->failfast
== FlagClear
)
659 disc
.state
&= ~(1 << MD_DISK_FAILFAST
);
660 remove_partitions(tfd
);
661 if (update
|| dv
->writemostly
!= FlagDefault
662 || dv
->failfast
!= FlagDefault
) {
664 tfd
= dev_open(dv
->devname
, O_RDWR
);
666 pr_err("failed to open %s for superblock update during re-add\n", dv
->devname
);
670 if (dv
->writemostly
== FlagSet
)
671 rv
= dev_st
->ss
->update_super(
672 dev_st
, NULL
, "writemostly",
673 devname
, verbose
, 0, NULL
);
674 if (dv
->writemostly
== FlagClear
)
675 rv
= dev_st
->ss
->update_super(
676 dev_st
, NULL
, "readwrite",
677 devname
, verbose
, 0, NULL
);
678 if (dv
->failfast
== FlagSet
)
679 rv
= dev_st
->ss
->update_super(
680 dev_st
, NULL
, "failfast",
681 devname
, verbose
, 0, NULL
);
682 if (dv
->failfast
== FlagClear
)
683 rv
= dev_st
->ss
->update_super(
684 dev_st
, NULL
, "nofailfast",
685 devname
, verbose
, 0, NULL
);
687 rv
= dev_st
->ss
->update_super(
688 dev_st
, NULL
, update
,
689 devname
, verbose
, 0, NULL
);
691 rv
= dev_st
->ss
->store_super(dev_st
, tfd
);
694 pr_err("failed to update superblock during re-add\n");
698 /* don't even try if disk is marked as faulty */
700 if (ioctl(fd
, ADD_NEW_DISK
, &disc
) == 0) {
702 pr_err("re-added %s\n", dv
->devname
);
705 if (errno
== ENOMEM
|| errno
== EROFS
) {
706 pr_err("add new device failed for %s: %s\n",
707 dv
->devname
, strerror(errno
));
708 if (dv
->disposition
== 'M')
717 int Manage_add(int fd
, int tfd
, struct mddev_dev
*dv
,
718 struct supertype
*tst
, mdu_array_info_t
*array
,
719 int force
, int verbose
, char *devname
,
720 char *update
, unsigned long rdev
, unsigned long long array_size
,
723 unsigned long long ldsize
;
724 struct supertype
*dev_st
;
726 mdu_disk_info_t disc
;
728 if (!get_dev_size(tfd
, dv
->devname
, &ldsize
)) {
729 if (dv
->disposition
== 'M')
735 if (tst
->ss
== &super0
&& ldsize
> 4ULL*1024*1024*1024*1024) {
736 /* More than 4TB is wasted on v0.90 */
738 pr_err("%s is larger than %s can effectively use.\n"
739 " Add --force is you really want to add this device.\n",
740 dv
->devname
, devname
);
743 pr_err("%s is larger than %s can effectively use.\n"
744 " Adding anyway as --force was given.\n",
745 dv
->devname
, devname
);
747 if (!tst
->ss
->external
&& array
->major_version
== 0) {
748 if (ioctl(fd
, HOT_ADD_DISK
, rdev
)==0) {
750 pr_err("hot added %s\n",
755 pr_err("hot add failed for %s: %s\n",
756 dv
->devname
, strerror(errno
));
760 if (array
->not_persistent
== 0 || tst
->ss
->external
) {
762 /* need to find a sample superblock to copy, and
763 * a spare slot to use.
764 * For 'external' array (well, container based),
765 * We can just load the metadata for the array->
769 /* already loaded */;
770 else if (tst
->ss
->external
) {
771 tst
->ss
->load_container(tst
, fd
, NULL
);
772 } else for (j
= 0; j
< tst
->max_devs
; j
++) {
776 if (md_get_disk_info(fd
, &disc
))
778 if (disc
.major
==0 && disc
.minor
==0)
780 if ((disc
.state
& 4)==0) /* sync */
782 /* Looks like a good device to try */
783 dev
= map_dev(disc
.major
, disc
.minor
, 1);
786 dfd
= dev_open(dev
, O_RDONLY
);
789 if (tst
->ss
->load_super(tst
, dfd
,
797 /* FIXME this is a bad test to be using */
798 if (!tst
->sb
&& (dv
->disposition
!= 'a'
799 && dv
->disposition
!= 'S')) {
800 /* we are re-adding a device to a
801 * completely dead array - have to depend
804 } else if (!tst
->sb
) {
805 pr_err("cannot load array metadata from %s\n", devname
);
809 /* Make sure device is large enough */
810 if (dv
->disposition
!= 'j' && /* skip size check for Journal */
812 tst
->ss
->avail_size(tst
, ldsize
/512, INVALID_SECTORS
) <
814 if (dv
->disposition
== 'M')
816 pr_err("%s not large enough to join array\n",
821 /* Possibly this device was recently part of
822 * the array and was temporarily removed, and
823 * is now being re-added. If so, we can
827 if (array
->not_persistent
== 0) {
828 dev_st
= dup_super(tst
);
829 dev_st
->ss
->load_super(dev_st
, tfd
, NULL
);
830 if (dev_st
->sb
&& dv
->disposition
!= 'S') {
833 rv
= attempt_re_add(fd
, tfd
, dv
, dev_st
, tst
,
834 rdev
, update
, devname
,
836 dev_st
->ss
->free_super(dev_st
);
841 if (dv
->disposition
== 'M') {
843 pr_err("--re-add for %s to %s is not possible\n",
844 dv
->devname
, devname
);
847 if (dv
->disposition
== 'A') {
848 pr_err("--re-add for %s to %s is not possible\n",
849 dv
->devname
, devname
);
852 if (array
->active_disks
< array
->raid_disks
) {
853 char *avail
= xcalloc(array
->raid_disks
, 1);
857 for (d
= 0; d
< MAX_DISKS
&& found
< array
->nr_disks
; d
++) {
859 if (md_get_disk_info(fd
, &disc
))
861 if (disc
.major
== 0 && disc
.minor
== 0)
863 if (!(disc
.state
& (1<<MD_DISK_SYNC
)))
865 avail
[disc
.raid_disk
] = 1;
868 array_failed
= !enough(array
->level
, array
->raid_disks
,
869 array
->layout
, 1, avail
);
874 pr_err("%s has failed so using --add cannot work and might destroy\n",
876 pr_err("data on %s. You should stop the array and re-assemble it.\n",
881 /* non-persistent. Must ensure that new drive
882 * is at least array->size big.
884 if (ldsize
/512 < array_size
) {
885 pr_err("%s not large enough to join array\n",
890 /* committed to really trying this device now*/
891 remove_partitions(tfd
);
893 /* in 2.6.17 and earlier, version-1 superblocks won't
894 * use the number we write, but will choose a free number.
895 * we must choose the same free number, which requires
896 * starting at 'raid_disks' and counting up
898 for (j
= array
->raid_disks
; j
< tst
->max_devs
; j
++) {
900 if (md_get_disk_info(fd
, &disc
))
902 if (disc
.major
==0 && disc
.minor
==0)
904 if (disc
.state
& 8) /* removed */
907 disc
.major
= major(rdev
);
908 disc
.minor
= minor(rdev
);
912 disc
.number
= raid_slot
;
915 /* only add journal to array that supports journaling */
916 if (dv
->disposition
== 'j') {
920 mdp
= sysfs_read(fd
, NULL
, GET_ARRAY_STATE
);
922 pr_err("%s unable to read array state.\n", devname
);
926 if (mdp
->array_state
!= ARRAY_READONLY
) {
928 pr_err("%s is not readonly, cannot add journal.\n", devname
);
934 tst
->ss
->getinfo_super(tst
, &mdi
, NULL
);
935 if (mdi
.journal_device_required
== 0) {
936 pr_err("%s does not support journal device.\n", devname
);
942 if (array
->not_persistent
==0) {
944 if (dv
->disposition
== 'j')
945 disc
.state
|= (1 << MD_DISK_JOURNAL
) | (1 << MD_DISK_SYNC
);
946 if (dv
->writemostly
== FlagSet
)
947 disc
.state
|= 1 << MD_DISK_WRITEMOSTLY
;
948 if (dv
->failfast
== FlagSet
)
949 disc
.state
|= 1 << MD_DISK_FAILFAST
;
950 dfd
= dev_open(dv
->devname
, O_RDWR
| O_EXCL
|O_DIRECT
);
951 if (tst
->ss
->add_to_super(tst
, &disc
, dfd
,
952 dv
->devname
, INVALID_SECTORS
))
954 if (tst
->ss
->write_init_super(tst
))
956 } else if (dv
->disposition
== 'A') {
957 /* this had better be raid1.
958 * As we are "--re-add"ing we must find a spare slot
961 char *used
= xcalloc(array
->raid_disks
, 1);
962 for (j
= 0; j
< tst
->max_devs
; j
++) {
963 mdu_disk_info_t disc2
;
965 if (md_get_disk_info(fd
, &disc2
))
967 if (disc2
.major
==0 && disc2
.minor
==0)
969 if (disc2
.state
& 8) /* removed */
971 if (disc2
.raid_disk
< 0)
973 if (disc2
.raid_disk
> array
->raid_disks
)
975 used
[disc2
.raid_disk
] = 1;
977 for (j
= 0 ; j
< array
->raid_disks
; j
++)
980 disc
.state
|= (1<<MD_DISK_SYNC
);
986 if (array
->state
& (1 << MD_SB_CLUSTERED
)) {
987 if (dv
->disposition
== 'c')
988 disc
.state
|= (1 << MD_DISK_CANDIDATE
);
990 disc
.state
|= (1 << MD_DISK_CLUSTER_ADD
);
993 if (dv
->writemostly
== FlagSet
)
994 disc
.state
|= (1 << MD_DISK_WRITEMOSTLY
);
995 if (dv
->failfast
== FlagSet
)
996 disc
.state
|= (1 << MD_DISK_FAILFAST
);
997 if (tst
->ss
->external
) {
999 * to an external metadata container */
1000 struct mdinfo new_mdi
;
1006 strcpy(devnm
, fd2devnm(fd
));
1008 container_fd
= open_dev_excl(devnm
);
1009 if (container_fd
< 0) {
1010 pr_err("add failed for %s: could not get exclusive access to container\n",
1012 tst
->ss
->free_super(tst
);
1016 Kill(dv
->devname
, NULL
, 0, -1, 0);
1017 dfd
= dev_open(dv
->devname
, O_RDWR
| O_EXCL
|O_DIRECT
);
1018 if (mdmon_running(tst
->container_devnm
))
1019 tst
->update_tail
= &tst
->updates
;
1020 if (tst
->ss
->add_to_super(tst
, &disc
, dfd
,
1021 dv
->devname
, INVALID_SECTORS
)) {
1023 close(container_fd
);
1026 if (tst
->update_tail
)
1027 flush_metadata_updates(tst
);
1029 tst
->ss
->sync_metadata(tst
);
1031 sra
= sysfs_read(container_fd
, NULL
, 0);
1033 pr_err("add failed for %s: sysfs_read failed\n",
1035 close(container_fd
);
1036 tst
->ss
->free_super(tst
);
1039 sra
->array
.level
= LEVEL_CONTAINER
;
1040 /* Need to set data_offset and component_size */
1041 tst
->ss
->getinfo_super(tst
, &new_mdi
, NULL
);
1042 new_mdi
.disk
.major
= disc
.major
;
1043 new_mdi
.disk
.minor
= disc
.minor
;
1044 new_mdi
.recovery_start
= 0;
1045 /* Make sure fds are closed as they are O_EXCL which
1046 * would block add_disk */
1047 tst
->ss
->free_super(tst
);
1048 if (sysfs_add_disk(sra
, &new_mdi
, 0) != 0) {
1049 pr_err("add new device to external metadata failed for %s\n", dv
->devname
);
1050 close(container_fd
);
1054 ping_monitor(devnm
);
1056 close(container_fd
);
1058 tst
->ss
->free_super(tst
);
1059 if (ioctl(fd
, ADD_NEW_DISK
, &disc
)) {
1060 if (dv
->disposition
== 'j')
1061 pr_err("Failed to hot add %s as journal, "
1062 "please try restart %s.\n", dv
->devname
, devname
);
1064 pr_err("add new device failed for %s as %d: %s\n",
1065 dv
->devname
, j
, strerror(errno
));
1068 if (dv
->disposition
== 'j') {
1069 pr_err("Journal added successfully, making %s read-write\n", devname
);
1070 if (Manage_ro(devname
, fd
, -1))
1071 pr_err("Failed to make %s read-write\n", devname
);
1076 pr_err("added %s\n", dv
->devname
);
1080 int Manage_remove(struct supertype
*tst
, int fd
, struct mddev_dev
*dv
,
1081 int sysfd
, unsigned long rdev
, int force
, int verbose
, char *devname
)
1086 if (tst
->ss
->external
) {
1087 /* To remove a device from a container, we must
1088 * check that it isn't in use in an array.
1089 * This involves looking in the 'holders'
1090 * directory - there must be just one entry,
1092 * To ensure that it doesn't get used as a
1093 * hot spare while we are checking, we
1094 * get an O_EXCL open on the container
1098 strcpy(devnm
, fd2devnm(fd
));
1099 lfd
= open_dev_excl(devnm
);
1101 pr_err("Cannot get exclusive access to container - odd\n");
1104 /* We may not be able to check on holders in
1105 * sysfs, either because we don't have the dev num
1106 * (rdev == 0) or because the device has been detached
1107 * and the 'holders' directory no longer exists
1108 * (ret == -1). In that case, assume it is OK to
1115 * The drive has already been set to 'faulty', however
1116 * monitor might not have had time to process it and the
1117 * drive might still have an entry in the 'holders'
1118 * directory. Try a few times to avoid a false error
1123 ret
= sysfs_unique_holder(devnm
, rdev
);
1126 usleep(100 * 1000); /* 100ms */
1127 } while (--count
> 0);
1130 pr_err("%s is not a member, cannot remove.\n",
1136 pr_err("%s is still in use, cannot remove.\n",
1143 /* FIXME check that it is a current member */
1145 /* device has been removed and we don't know
1146 * the major:minor number
1148 err
= sys_hot_remove_disk(sysfd
, force
);
1150 err
= hot_remove_disk(fd
, rdev
, force
);
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
,
1171 pr_err("hot remove failed for %s: %s\n", dv
->devname
,
1177 if (tst
->ss
->external
) {
1179 * Before dropping our exclusive open we make an
1180 * attempt at preventing mdmon from seeing an
1181 * 'add' event before reconciling this 'remove'
1184 char *devnm
= fd2devnm(fd
);
1187 pr_err("unable to get container name\n");
1191 ping_manager(devnm
);
1196 pr_err("hot removed %s from %s\n",
1197 dv
->devname
, devname
);
1201 int Manage_replace(struct supertype
*tst
, int fd
, struct mddev_dev
*dv
,
1202 unsigned long rdev
, int verbose
, char *devname
)
1204 struct mdinfo
*mdi
, *di
;
1205 if (tst
->ss
->external
) {
1206 pr_err("--replace only supported for native metadata (0.90 or 1.x)\n");
1209 /* Need to find the device in sysfs and add 'want_replacement' to the
1212 mdi
= sysfs_read(fd
, NULL
, GET_DEVS
);
1213 if (!mdi
|| !mdi
->devs
) {
1214 pr_err("Cannot find status of %s to enable replacement - strange\n",
1218 for (di
= mdi
->devs
; di
; di
= di
->next
)
1219 if (di
->disk
.major
== (int)major(rdev
) &&
1220 di
->disk
.minor
== (int)minor(rdev
))
1224 if (di
->disk
.raid_disk
< 0) {
1225 pr_err("%s is not active and so cannot be replaced.\n",
1230 rv
= sysfs_set_str(mdi
, di
,
1231 "state", "want_replacement");
1234 pr_err("Failed to request replacement for %s\n",
1239 pr_err("Marked %s (device %d in %s) for replacement\n",
1240 dv
->devname
, di
->disk
.raid_disk
, devname
);
1241 /* If there is a matching 'with', we need to tell it which
1244 while (dv
&& dv
->disposition
!= 'W')
1247 dv
->disposition
= 'w';
1248 dv
->used
= di
->disk
.raid_disk
;
1253 pr_err("%s not found in %s so cannot --replace it\n",
1254 dv
->devname
, devname
);
1258 int Manage_with(struct supertype
*tst
, int fd
, struct mddev_dev
*dv
,
1259 unsigned long rdev
, int verbose
, char *devname
)
1261 struct mdinfo
*mdi
, *di
;
1262 /* try to set 'slot' for 'rdev' in 'fd' to 'dv->used' */
1263 mdi
= sysfs_read(fd
, NULL
, GET_DEVS
|GET_STATE
);
1264 if (!mdi
|| !mdi
->devs
) {
1265 pr_err("Cannot find status of %s to enable replacement - strange\n",
1269 for (di
= mdi
->devs
; di
; di
= di
->next
)
1270 if (di
->disk
.major
== (int)major(rdev
) &&
1271 di
->disk
.minor
== (int)minor(rdev
))
1275 if (di
->disk
.state
& (1<<MD_DISK_FAULTY
)) {
1276 pr_err("%s is faulty and cannot be a replacement\n",
1281 if (di
->disk
.raid_disk
>= 0) {
1282 pr_err("%s is active and cannot be a replacement\n",
1287 rv
= sysfs_set_num(mdi
, di
,
1291 pr_err("Failed to set %s as preferred replacement.\n",
1296 pr_err("Marked %s in %s as replacement for device %d\n",
1297 dv
->devname
, devname
, dv
->used
);
1301 pr_err("%s not found in %s so cannot make it preferred replacement\n",
1302 dv
->devname
, devname
);
1306 int Manage_subdevs(char *devname
, int fd
,
1307 struct mddev_dev
*devlist
, int verbose
, int test
,
1308 char *update
, int force
)
1310 /* Do something to each dev.
1312 * 'a' - add the device
1314 * If that fails EINVAL, try ADD_NEW_DISK
1315 * 'S' - add the device as a spare - don't try re-add
1316 * 'j' - add the device as a journal device
1317 * 'A' - re-add the device
1318 * 'r' - remove the device: HOT_REMOVE_DISK
1319 * device can be 'faulty' or 'detached' in which case all
1320 * matching devices are removed.
1321 * 'f' - set the device faulty SET_DISK_FAULTY
1322 * device can be 'detached' in which case any device that
1323 * is inaccessible will be marked faulty.
1324 * 'R' - mark this device as wanting replacement.
1325 * 'W' - this device is added if necessary and activated as
1326 * a replacement for a previous 'R' device.
1328 * 'w' - 'W' will be changed to 'w' when it is paired with
1329 * a 'R' device. If a 'W' is found while walking the list
1330 * it must be unpaired, and is an error.
1331 * 'M' - this is created by a 'missing' target. It is a slight
1333 * 'F' - Another variant of 'A', where the device was faulty
1334 * so must be removed from the array first.
1335 * 'c' - confirm the device as found (for clustered environments)
1337 * For 'f' and 'r', the device can also be a kernel-internal
1338 * name such as 'sdb'.
1340 mdu_array_info_t array
;
1341 unsigned long long array_size
;
1342 struct mddev_dev
*dv
;
1344 struct supertype
*tst
;
1345 char *subarray
= NULL
;
1347 int count
= 0; /* number of actions taken */
1349 struct mdinfo devinfo
;
1354 if (sysfs_init(&info
, fd
, NULL
)) {
1355 pr_err("sysfs not availabile for %s\n", devname
);
1359 if (md_get_array_info(fd
, &array
)) {
1360 pr_err("Cannot get array info for %s\n", devname
);
1363 /* array.size is only 32 bits and may be truncated.
1364 * So read from sysfs if possible, and record number of sectors
1367 array_size
= get_component_size(fd
);
1368 if (array_size
<= 0)
1369 array_size
= array
.size
* 2;
1371 tst
= super_by_fd(fd
, &subarray
);
1373 pr_err("unsupport array - version %d.%d\n",
1374 array
.major_version
, array
.minor_version
);
1378 for (dv
= devlist
; dv
; dv
= dv
->next
) {
1379 unsigned long rdev
= 0; /* device to add/remove etc */
1384 if (dv
->disposition
== 'c') {
1385 rv
= parse_cluster_confirm_arg(dv
->devname
,
1389 pr_err("Could not get the devname of cluster\n");
1394 if (strcmp(dv
->devname
, "failed") == 0 ||
1395 strcmp(dv
->devname
, "faulty") == 0) {
1396 if (dv
->disposition
!= 'A'
1397 && dv
->disposition
!= 'r') {
1398 pr_err("%s only meaningful with -r or --re-add, not -%c\n",
1399 dv
->devname
, dv
->disposition
);
1402 add_faulty(dv
, fd
, (dv
->disposition
== 'A'
1406 if (strcmp(dv
->devname
, "detached") == 0) {
1407 if (dv
->disposition
!= 'r' && dv
->disposition
!= 'f') {
1408 pr_err("%s only meaningful with -r of -f, not -%c\n",
1409 dv
->devname
, dv
->disposition
);
1412 add_detached(dv
, fd
, dv
->disposition
);
1416 if (strcmp(dv
->devname
, "missing") == 0) {
1417 struct mddev_dev
*add_devlist
;
1418 struct mddev_dev
**dp
;
1419 if (dv
->disposition
== 'c') {
1420 rv
= ioctl(fd
, CLUSTERED_DISK_NACK
, NULL
);
1424 if (dv
->disposition
!= 'A') {
1425 pr_err("'missing' only meaningful with --re-add\n");
1428 add_devlist
= conf_get_devs();
1429 if (add_devlist
== NULL
) {
1430 pr_err("no devices to scan for missing members.");
1433 for (dp
= &add_devlist
; *dp
; dp
= & (*dp
)->next
)
1434 /* 'M' (for 'missing') is like 'A' without errors */
1435 (*dp
)->disposition
= 'M';
1437 dv
->next
= add_devlist
;
1441 if (strncmp(dv
->devname
, "set-", 4) == 0 &&
1442 strlen(dv
->devname
) == 5) {
1445 if (dv
->disposition
!= 'r' &&
1446 dv
->disposition
!= 'f') {
1447 pr_err("'%s' only meaningful with -r or -f\n",
1451 if (array
.level
!= 10) {
1452 pr_err("'%s' only meaningful with RAID10 arrays\n",
1456 copies
= ((array
.layout
& 0xff) *
1457 ((array
.layout
>> 8) & 0xff));
1458 if (array
.raid_disks
% copies
!= 0 ||
1459 dv
->devname
[4] < 'A' ||
1460 dv
->devname
[4] >= 'A' + copies
||
1462 pr_err("'%s' not meaningful with this array\n",
1466 add_set(dv
, fd
, dv
->devname
[4]);
1470 if (strchr(dv
->devname
, '/') == NULL
&&
1471 strchr(dv
->devname
, ':') == NULL
&&
1472 strlen(dv
->devname
) < 50) {
1473 /* Assume this is a kernel-internal name like 'sda1' */
1476 if (dv
->disposition
!= 'r' && dv
->disposition
!= 'f') {
1477 pr_err("%s only meaningful with -r or -f, not -%c\n",
1478 dv
->devname
, dv
->disposition
);
1482 sprintf(dname
, "dev-%s", dv
->devname
);
1483 sysfd
= sysfs_open(fd2devnm(fd
), dname
, "block/dev");
1486 if (sysfs_fd_get_str(sysfd
, dn
, 20) > 0 &&
1487 sscanf(dn
, "%d:%d", &mj
,&mn
) == 2) {
1488 rdev
= makedev(mj
,mn
);
1495 sysfd
= sysfs_open(fd2devnm(fd
), dname
, "state");
1497 pr_err("%s does not appear to be a component of %s\n",
1498 dv
->devname
, devname
);
1502 } else if ((dv
->disposition
== 'r' || dv
->disposition
== 'f')
1503 && get_maj_min(dv
->devname
, &mj
, &mn
)) {
1504 /* for 'fail' and 'remove', the device might
1507 rdev
= makedev(mj
, mn
);
1509 tfd
= dev_open(dv
->devname
, O_RDONLY
);
1511 fstat_is_blkdev(tfd
, dv
->devname
, &rdev
);
1514 int open_err
= errno
;
1515 if (!stat_is_blkdev(dv
->devname
, &rdev
)) {
1516 if (dv
->disposition
== 'M')
1517 /* non-fatal. Also improbable */
1521 if (dv
->disposition
== 'r')
1522 /* Be happy, the stat worked, that is
1523 * enough for --remove
1527 if (dv
->disposition
== 'M')
1530 pr_err("Cannot open %s: %s\n",
1531 dv
->devname
, strerror(open_err
));
1536 switch(dv
->disposition
){
1538 pr_err("internal error - devmode[%s]=%d\n",
1539 dv
->devname
, dv
->disposition
);
1542 case 'S': /* --add-spare */
1543 case 'j': /* --add-journal */
1545 case 'M': /* --re-add missing */
1546 case 'F': /* --re-add faulty */
1547 case 'c': /* --cluster-confirm */
1548 /* add the device */
1550 pr_err("Cannot add disks to a \'member\' array, perform this operation on the parent container\n");
1554 /* Let's first try to write re-add to sysfs */
1556 (dv
->disposition
== 'A' || dv
->disposition
== 'F')) {
1557 sysfs_init_dev(&devinfo
, rdev
);
1558 if (sysfs_set_str(&info
, &devinfo
, "state", "re-add") == 0) {
1559 pr_err("re-add %s to %s succeed\n",
1560 dv
->devname
, info
.sys_name
);
1565 if (dv
->disposition
== 'F')
1566 /* Need to remove first */
1567 hot_remove_disk(fd
, rdev
, force
);
1568 /* Make sure it isn't in use (in 2.6 or later) */
1569 tfd
= dev_open(dv
->devname
, O_RDONLY
|O_EXCL
);
1571 /* We know no-one else is using it. We'll
1572 * need non-exclusive access to add it, so
1576 tfd
= dev_open(dv
->devname
, O_RDONLY
);
1579 if (dv
->disposition
== 'M')
1581 pr_err("Cannot open %s: %s\n",
1582 dv
->devname
, strerror(errno
));
1586 if (sysfs_freeze_array(&info
) == 1)
1591 rv
= Manage_add(fd
, tfd
, dv
, tst
, &array
,
1592 force
, verbose
, devname
, update
,
1593 rdev
, array_size
, raid_slot
);
1605 pr_err("Cannot remove disks from a \'member\' array, perform this operation on the parent container\n");
1608 rv
= Manage_remove(tst
, fd
, dv
, sysfd
,
1609 rdev
, verbose
, force
,
1620 case 'f': /* set faulty */
1621 /* FIXME check current member */
1622 if ((sysfd
>= 0 && write(sysfd
, "faulty", 6) != 6) ||
1623 (sysfd
< 0 && ioctl(fd
, SET_DISK_FAULTY
,
1627 pr_err("set device faulty failed for %s: %s\n",
1628 dv
->devname
, strerror(errno
));
1638 pr_err("set %s faulty in %s\n",
1639 dv
->devname
, devname
);
1641 case 'R': /* Mark as replaceable */
1643 pr_err("Cannot replace disks in a \'member\' array, perform this operation on the parent container\n");
1647 if (sysfs_freeze_array(&info
) == 1)
1652 rv
= Manage_replace(tst
, fd
, dv
,
1661 case 'W': /* --with device that doesn't match */
1662 pr_err("No matching --replace device for --with %s\n",
1665 case 'w': /* --with device which was matched */
1666 rv
= Manage_with(tst
, fd
, dv
,
1667 rdev
, verbose
, devname
);
1674 sysfs_set_str(&info
, NULL
, "sync_action","idle");
1675 if (test
&& count
== 0)
1681 sysfs_set_str(&info
, NULL
, "sync_action","idle");
1682 return !test
&& busy
? 2 : 1;
1685 int autodetect(void)
1687 /* Open any md device, and issue the RAID_AUTORUN ioctl */
1689 int fd
= dev_open("9:0", O_RDONLY
);
1691 if (ioctl(fd
, RAID_AUTORUN
, 0) == 0)
1698 int Update_subarray(char *dev
, char *subarray
, char *update
, struct mddev_ident
*ident
, int verbose
)
1700 struct supertype supertype
, *st
= &supertype
;
1703 memset(st
, 0, sizeof(*st
));
1705 fd
= open_subarray(dev
, subarray
, st
, verbose
< 0);
1709 if (!st
->ss
->update_subarray
) {
1711 pr_err("Operation not supported for %s metadata\n",
1716 if (mdmon_running(st
->devnm
))
1717 st
->update_tail
= &st
->updates
;
1719 rv
= st
->ss
->update_subarray(st
, subarray
, update
, ident
);
1723 pr_err("Failed to update %s of subarray-%s in %s\n",
1724 update
, subarray
, dev
);
1725 } else if (st
->update_tail
)
1726 flush_metadata_updates(st
);
1728 st
->ss
->sync_metadata(st
);
1730 if (rv
== 0 && strcmp(update
, "name") == 0 && verbose
>= 0)
1731 pr_err("Updated subarray-%s name from %s, UUIDs may have changed\n",
1735 st
->ss
->free_super(st
);
1741 /* Move spare from one array to another If adding to destination array fails
1742 * add back to original array.
1743 * Returns 1 on success, 0 on failure */
1744 int move_spare(char *from_devname
, char *to_devname
, dev_t devid
)
1746 struct mddev_dev devlist
;
1749 /* try to remove and add */
1750 int fd1
= open(to_devname
, O_RDONLY
);
1751 int fd2
= open(from_devname
, O_RDONLY
);
1753 if (fd1
< 0 || fd2
< 0) {
1754 if (fd1
>=0) close(fd1
);
1755 if (fd2
>=0) close(fd2
);
1759 devlist
.next
= NULL
;
1761 devlist
.writemostly
= FlagDefault
;
1762 devlist
.failfast
= FlagDefault
;
1763 devlist
.devname
= devname
;
1764 sprintf(devname
, "%d:%d", major(devid
), minor(devid
));
1766 devlist
.disposition
= 'r';
1767 if (Manage_subdevs(from_devname
, fd2
, &devlist
, -1, 0, NULL
, 0) == 0) {
1768 devlist
.disposition
= 'a';
1769 if (Manage_subdevs(to_devname
, fd1
, &devlist
, -1, 0, NULL
, 0) == 0) {
1770 /* make sure manager is aware of changes */
1771 ping_manager(to_devname
);
1772 ping_manager(from_devname
);
1777 else Manage_subdevs(from_devname
, fd2
, &devlist
, -1, 0, NULL
, 0);