]>
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
));
129 static void remove_devices(char *devnm
, char *path
)
132 * Remove names at 'path' - possibly with
133 * partition suffixes - which link to the 'standard'
134 * name for devnm. These were probably created
135 * by mdadm when the array was assembled.
148 sprintf(base
, "/dev/%s", devnm
);
149 be
= base
+ strlen(base
);
151 path2
= xmalloc(strlen(path
)+20);
153 pe
= path2
+ strlen(path2
);
155 for (part
= 0; part
< 16; part
++) {
157 sprintf(be
, "p%d", part
);
160 sprintf(pe
, "p%d", part
);
162 sprintf(pe
, "%d", part
);
164 n
= readlink(path2
, link
, sizeof(link
));
165 if (n
> 0 && (int)strlen(base
) == n
&&
166 strncmp(link
, base
, n
) == 0)
172 int Manage_run(char *devname
, int fd
, struct context
*c
)
174 /* Run the array. Array must already be configured
179 if (md_get_version(fd
) < 9000) {
180 pr_err("need md driver version 0.90.0 or later\n");
185 pr_err("Cannot find %s in sysfs!!\n", devname
);
189 return IncrementalScan(c
, nm
);
192 int Manage_stop(char *devname
, int fd
, int verbose
, int will_retry
)
194 /* Stop the array. Array must already be configured
195 * 'will_retry' means that error messages are not wanted.
198 struct map_ent
*map
= NULL
;
205 unsigned long long rd1
, rd2
;
207 if (will_retry
&& verbose
== 0)
210 if (md_get_version(fd
) < 9000) {
211 if (ioctl(fd
, STOP_MD
, 0) == 0)
213 pr_err("stopping device %s failed: %s\n",
214 devname
, strerror(errno
));
218 strcpy(devnm
, fd2devnm(fd
));
219 /* Get EXCL access first. If this fails, then attempting
220 * to stop is probably a bad idea.
222 mdi
= sysfs_read(fd
, NULL
, GET_LEVEL
|GET_COMPONENT
|GET_VERSION
);
223 if (mdi
&& is_subarray(mdi
->text_version
)) {
225 strncpy(container
, mdi
->text_version
+1, sizeof(container
));
226 container
[sizeof(container
)-1] = 0;
227 sl
= strchr(container
, '/');
234 while (((fd
= ((devname
[0] == '/')
235 ?open(devname
, O_RDONLY
|O_EXCL
)
236 :open_dev_flags(devnm
, O_RDONLY
|O_EXCL
))) < 0
237 || strcmp(fd2devnm(fd
), devnm
) != 0)
239 && mdmon_running(container
)
241 /* Can't open, so something might be wrong. However it
242 * is a container, so we might be racing with mdmon, so
247 flush_mdmon(container
);
250 if (fd
< 0 || strcmp(fd2devnm(fd
), devnm
) != 0) {
254 pr_err("Cannot get exclusive access to %s:Perhaps a running process, mounted filesystem or active volume group?\n",
258 /* If this is an mdmon managed array, just write 'inactive'
259 * to the array state and let mdmon clear up.
262 mdi
->array
.level
> 0 &&
263 is_subarray(mdi
->text_version
)) {
265 /* This is mdmon managed. */
268 /* As we had an O_EXCL open, any use of the device
269 * which blocks STOP_ARRAY is probably a transient use,
270 * so it is reasonable to retry for a while - 5 seconds.
274 (err
= sysfs_set_str(mdi
, NULL
,
283 pr_err("failed to stop array %s: %s\n",
284 devname
, strerror(errno
));
289 /* Give monitor a chance to act */
290 ping_monitor(mdi
->text_version
);
292 fd
= open_dev_excl(devnm
);
295 pr_err("failed to completely stop %s: Device is busy\n",
301 mdi
->array
.major_version
== -1 &&
302 mdi
->array
.minor_version
== -2 &&
303 !is_subarray(mdi
->text_version
)) {
304 struct mdstat_ent
*mds
, *m
;
305 /* container, possibly mdmon-managed.
306 * Make sure mdmon isn't opening it, which
307 * would interfere with the 'stop'
309 ping_monitor(mdi
->sys_name
);
311 /* now check that there are no existing arrays
312 * which are members of this array
314 mds
= mdstat_read(0, 0);
315 for (m
= mds
; m
; m
= m
->next
)
316 if (m
->metadata_version
&&
317 strncmp(m
->metadata_version
, "external:", 9)==0 &&
318 metadata_container_matches(m
->metadata_version
+9,
321 pr_err("Cannot stop container %s: member %s still active\n",
329 /* If the array is undergoing a reshape which changes the number
330 * of devices, then it would be nice to stop it at a point where
331 * it has completed a full number of stripes in both old and
332 * new layouts as this will allow the reshape to be reverted.
333 * So if 'sync_action' is "reshape" and 'raid_disks' shows two
334 * different numbers, then
336 * - set sync_max to next multiple of both data_disks and
337 * chunk sizes (or next but one)
339 * - wait on 'sync_completed' for that point to be reached.
341 if (mdi
&& (mdi
->array
.level
>= 4 && mdi
->array
.level
<= 6) &&
342 sysfs_attribute_available(mdi
, NULL
, "sync_action") &&
343 sysfs_attribute_available(mdi
, NULL
, "reshape_direction") &&
344 sysfs_get_str(mdi
, NULL
, "sync_action", buf
, 20) > 0 &&
345 strcmp(buf
, "reshape\n") == 0 &&
346 sysfs_get_two(mdi
, NULL
, "raid_disks", &rd1
, &rd2
) == 2) {
347 unsigned long long position
, curr
;
348 unsigned long long chunk1
, chunk2
;
349 unsigned long long rddiv
, chunkdiv
;
350 unsigned long long sectors
;
351 unsigned long long sync_max
, old_sync_max
;
352 unsigned long long completed
;
358 while (rd1
> rd2
&& delay
> 0 &&
359 sysfs_get_ll(mdi
, NULL
, "sync_max", &old_sync_max
) == 0) {
360 /* must be in the critical section - wait a bit */
365 if (sysfs_set_str(mdi
, NULL
, "sync_action", "frozen") != 0)
367 /* Array is frozen */
369 rd1
-= mdi
->array
.level
== 6 ? 2 : 1;
370 rd2
-= mdi
->array
.level
== 6 ? 2 : 1;
371 sysfs_get_str(mdi
, NULL
, "reshape_direction", buf
, sizeof(buf
));
372 if (strncmp(buf
, "back", 4) == 0)
374 if (sysfs_get_ll(mdi
, NULL
, "reshape_position", &position
) != 0) {
375 /* reshape must have finished now */
376 sysfs_set_str(mdi
, NULL
, "sync_action", "idle");
379 sysfs_get_two(mdi
, NULL
, "chunk_size", &chunk1
, &chunk2
);
382 rddiv
= GCD(rd1
, rd2
);
383 chunkdiv
= GCD(chunk1
, chunk2
);
384 sectors
= (chunk1
/chunkdiv
) * chunk2
* (rd1
/rddiv
) * rd2
;
387 /* Need to subtract 'reshape_position' from
388 * array size to get equivalent of sync_max.
389 * Size calculation based on raid5_size in kernel.
391 unsigned long long size
= mdi
->component_size
;
394 /* rd1 must be smaller */
395 /* Reshape may have progressed further backwards than
396 * recorded, so target even further back (hence "-1")
398 position
= (position
/ sectors
- 1) * sectors
;
399 /* rd1 is always the conversion factor between 'sync'
400 * position and 'reshape' position.
401 * We read 1 "new" stripe worth of data from where-ever,
402 * and when write out that full stripe.
404 sync_max
= size
- position
/rd1
;
406 /* Reshape will very likely be beyond position, and it may
407 * be too late to stop at '+1', so aim for '+2'
409 position
= (position
/ sectors
+ 2) * sectors
;
410 sync_max
= position
/rd1
;
412 if (sysfs_get_ll(mdi
, NULL
, "sync_max", &old_sync_max
) < 0)
413 old_sync_max
= mdi
->component_size
;
414 /* Must not advance sync_max as that could confuse
415 * the reshape monitor */
416 if (sync_max
< old_sync_max
)
417 sysfs_set_num(mdi
, NULL
, "sync_max", sync_max
);
418 sysfs_set_str(mdi
, NULL
, "sync_action", "idle");
420 /* That should have set things going again. Now we
421 * wait a little while (3 second max) for sync_completed
422 * to reach the target.
423 * The reshape process can block for 500msec if
424 * the sync speed limit is hit, so we need to wait
425 * a lot longer than that. 1 second is usually
429 scfd
= sysfs_open(mdi
->sys_name
, NULL
, "sync_completed");
430 while (scfd
>= 0 && delay
> 0 && old_sync_max
> 0) {
431 unsigned long long max_completed
;
432 sysfs_get_ll(mdi
, NULL
, "reshape_position", &curr
);
433 sysfs_fd_get_str(scfd
, buf
, sizeof(buf
));
434 if (strncmp(buf
, "none", 4) == 0) {
435 /* Either reshape has aborted, or hasn't
436 * quite started yet. Wait a bit and
437 * check 'sync_action' to see.
440 sysfs_get_str(mdi
, NULL
, "sync_action", buf
, sizeof(buf
));
441 if (strncmp(buf
, "reshape", 7) != 0)
445 if (sysfs_fd_get_two(scfd
, &completed
,
446 &max_completed
) == 2 &&
447 /* 'completed' sometimes reads as max-uulong */
448 completed
< max_completed
&&
449 (completed
> sync_max
||
450 (completed
== sync_max
&& curr
!= position
))) {
451 while (completed
> sync_max
) {
452 sync_max
+= sectors
/ rd1
;
458 if (sync_max
< old_sync_max
)
459 sysfs_set_num(mdi
, NULL
, "sync_max", sync_max
);
462 if (!backwards
&& curr
>= position
)
464 if (backwards
&& curr
<= position
)
466 sysfs_wait(scfd
, &delay
);
474 /* As we have an O_EXCL open, any use of the device
475 * which blocks STOP_ARRAY is probably a transient use,
476 * so it is reasonable to retry for a while - 5 seconds.
479 while (count
&& fd
>= 0
480 && (err
= ioctl(fd
, STOP_ARRAY
, NULL
)) < 0
485 if (fd
>= 0 && err
) {
487 pr_err("failed to stop array %s: %s\n",
488 devname
, strerror(errno
));
490 cont_err("Perhaps a running process, mounted filesystem or active volume group?\n");
496 if (get_linux_version() < 2006028) {
497 /* prior to 2.6.28, KOBJ_CHANGE was not sent when an md array
498 * was stopped, so We'll do it here just to be sure. Drop any
499 * partitions as well...
502 ioctl(fd
, BLKRRPART
, 0);
504 sysfs_uevent(mdi
, "change");
507 if (devnm
[0] && use_udev()) {
508 struct map_ent
*mp
= map_by_devnm(&map
, devnm
);
509 remove_devices(devnm
, mp
? mp
->path
: NULL
);
513 pr_err("stopped %s\n", devname
);
515 map_remove(&map
, devnm
);
523 static struct mddev_dev
*add_one(struct mddev_dev
*dv
, char *name
, char disp
)
525 struct mddev_dev
*new;
526 new = xmalloc(sizeof(*new));
527 memset(new, 0, sizeof(*new));
528 new->devname
= xstrdup(name
);
529 new->disposition
= disp
;
530 new->next
= dv
->next
;
535 static void add_faulty(struct mddev_dev
*dv
, int fd
, char disp
)
537 mdu_array_info_t array
;
538 mdu_disk_info_t disk
;
542 if (ioctl(fd
, GET_ARRAY_INFO
, &array
) != 0)
545 remaining_disks
= array
.nr_disks
;
546 for (i
= 0; i
< MAX_DISKS
&& remaining_disks
> 0; i
++) {
549 if (ioctl(fd
, GET_DISK_INFO
, &disk
) != 0)
551 if (disk
.major
== 0 && disk
.minor
== 0)
554 if ((disk
.state
& 1) == 0) /* not faulty */
556 sprintf(buf
, "%d:%d", disk
.major
, disk
.minor
);
557 dv
= add_one(dv
, buf
, disp
);
561 static void add_detached(struct mddev_dev
*dv
, int fd
, char disp
)
563 mdu_array_info_t array
;
564 mdu_disk_info_t disk
;
568 if (ioctl(fd
, GET_ARRAY_INFO
, &array
) != 0)
571 remaining_disks
= array
.nr_disks
;
572 for (i
= 0; i
< MAX_DISKS
&& remaining_disks
> 0; i
++) {
576 if (ioctl(fd
, GET_DISK_INFO
, &disk
) != 0)
578 if (disk
.major
== 0 && disk
.minor
== 0)
581 if (disp
== 'f' && (disk
.state
& 1) != 0) /* already faulty */
583 sprintf(buf
, "%d:%d", disk
.major
, disk
.minor
);
584 sfd
= dev_open(buf
, O_RDONLY
);
591 /* Probably not detached */
593 dv
= add_one(dv
, buf
, disp
);
597 static void add_set(struct mddev_dev
*dv
, int fd
, char set_char
)
599 mdu_array_info_t array
;
600 mdu_disk_info_t disk
;
605 if (ioctl(fd
, GET_ARRAY_INFO
, &array
) != 0)
607 if (array
.level
!= 10)
609 copies
= ((array
.layout
& 0xff) *
610 ((array
.layout
>> 8) & 0xff));
611 if (array
.raid_disks
% copies
)
614 remaining_disks
= array
.nr_disks
;
615 for (i
= 0; i
< MAX_DISKS
&& remaining_disks
> 0; i
++) {
618 if (ioctl(fd
, GET_DISK_INFO
, &disk
) != 0)
620 if (disk
.major
== 0 && disk
.minor
== 0)
623 set
= disk
.raid_disk
% copies
;
624 if (set_char
!= set
+ 'A')
626 sprintf(buf
, "%d:%d", disk
.major
, disk
.minor
);
627 dv
= add_one(dv
, buf
, dv
->disposition
);
631 int attempt_re_add(int fd
, int tfd
, struct mddev_dev
*dv
,
632 struct supertype
*dev_st
, struct supertype
*tst
,
634 char *update
, char *devname
, int verbose
,
635 mdu_array_info_t
*array
)
641 dev_st
->ss
->getinfo_super(dev_st
, &mdi
, NULL
);
642 dev_st
->ss
->uuid_from_super(dev_st
, ouuid
);
644 tst
->ss
->uuid_from_super(tst
, duuid
);
646 /* Assume uuid matches: kernel will check */
647 memcpy(duuid
, ouuid
, sizeof(ouuid
));
648 if ((mdi
.disk
.state
& (1<<MD_DISK_ACTIVE
)) &&
649 !(mdi
.disk
.state
& (1<<MD_DISK_FAULTY
)) &&
650 memcmp(duuid
, ouuid
, sizeof(ouuid
))==0) {
651 /* Looks like it is worth a
652 * try. Need to make sure
653 * kernel will accept it
656 mdu_disk_info_t disc
;
657 /* re-add doesn't work for version-1 superblocks
660 if (array
->major_version
== 1 &&
661 get_linux_version() <= 2006018)
663 disc
.number
= mdi
.disk
.number
;
664 if (ioctl(fd
, GET_DISK_INFO
, &disc
) != 0
665 || disc
.major
!= 0 || disc
.minor
!= 0
668 disc
.major
= major(rdev
);
669 disc
.minor
= minor(rdev
);
670 disc
.number
= mdi
.disk
.number
;
671 disc
.raid_disk
= mdi
.disk
.raid_disk
;
672 disc
.state
= mdi
.disk
.state
;
673 if (array
->state
& (1 << MD_SB_CLUSTERED
)) {
674 /* extra flags are needed when adding to a cluster as
675 * there are two cases to distinguish
677 if (dv
->disposition
== 'c')
678 disc
.state
|= (1 << MD_DISK_CANDIDATE
);
680 disc
.state
|= (1 << MD_DISK_CLUSTER_ADD
);
682 if (dv
->writemostly
== FlagSet
)
683 disc
.state
|= 1 << MD_DISK_WRITEMOSTLY
;
684 if (dv
->writemostly
== FlagClear
)
685 disc
.state
&= ~(1 << MD_DISK_WRITEMOSTLY
);
686 if (dv
->failfast
== FlagSet
)
687 disc
.state
|= 1 << MD_DISK_FAILFAST
;
688 if (dv
->failfast
== FlagClear
)
689 disc
.state
&= ~(1 << MD_DISK_FAILFAST
);
690 remove_partitions(tfd
);
691 if (update
|| dv
->writemostly
!= FlagDefault
692 || dv
->failfast
!= FlagDefault
) {
694 tfd
= dev_open(dv
->devname
, O_RDWR
);
696 pr_err("failed to open %s for superblock update during re-add\n", dv
->devname
);
700 if (dv
->writemostly
== FlagSet
)
701 rv
= dev_st
->ss
->update_super(
702 dev_st
, NULL
, "writemostly",
703 devname
, verbose
, 0, NULL
);
704 if (dv
->writemostly
== FlagClear
)
705 rv
= dev_st
->ss
->update_super(
706 dev_st
, NULL
, "readwrite",
707 devname
, verbose
, 0, NULL
);
708 if (dv
->failfast
== FlagSet
)
709 rv
= dev_st
->ss
->update_super(
710 dev_st
, NULL
, "failfast",
711 devname
, verbose
, 0, NULL
);
712 if (dv
->failfast
== FlagClear
)
713 rv
= dev_st
->ss
->update_super(
714 dev_st
, NULL
, "nofailfast",
715 devname
, verbose
, 0, NULL
);
717 rv
= dev_st
->ss
->update_super(
718 dev_st
, NULL
, update
,
719 devname
, verbose
, 0, NULL
);
721 rv
= dev_st
->ss
->store_super(dev_st
, tfd
);
724 pr_err("failed to update superblock during re-add\n");
728 /* don't even try if disk is marked as faulty */
730 if (ioctl(fd
, ADD_NEW_DISK
, &disc
) == 0) {
732 pr_err("re-added %s\n", dv
->devname
);
735 if (errno
== ENOMEM
|| errno
== EROFS
) {
736 pr_err("add new device failed for %s: %s\n",
737 dv
->devname
, strerror(errno
));
738 if (dv
->disposition
== 'M')
747 int Manage_add(int fd
, int tfd
, struct mddev_dev
*dv
,
748 struct supertype
*tst
, mdu_array_info_t
*array
,
749 int force
, int verbose
, char *devname
,
750 char *update
, unsigned long rdev
, unsigned long long array_size
,
753 unsigned long long ldsize
;
754 struct supertype
*dev_st
;
756 mdu_disk_info_t disc
;
758 if (!get_dev_size(tfd
, dv
->devname
, &ldsize
)) {
759 if (dv
->disposition
== 'M')
765 if (tst
->ss
== &super0
&& ldsize
> 4ULL*1024*1024*1024*1024) {
766 /* More than 4TB is wasted on v0.90 */
768 pr_err("%s is larger than %s can effectively use.\n"
769 " Add --force is you really want to add this device.\n",
770 dv
->devname
, devname
);
773 pr_err("%s is larger than %s can effectively use.\n"
774 " Adding anyway as --force was given.\n",
775 dv
->devname
, devname
);
777 if (!tst
->ss
->external
&&
778 array
->major_version
== 0 &&
779 md_get_version(fd
)%100 < 2) {
780 if (ioctl(fd
, HOT_ADD_DISK
, rdev
)==0) {
782 pr_err("hot added %s\n",
787 pr_err("hot add failed for %s: %s\n",
788 dv
->devname
, strerror(errno
));
792 if (array
->not_persistent
== 0 || tst
->ss
->external
) {
794 /* need to find a sample superblock to copy, and
795 * a spare slot to use.
796 * For 'external' array (well, container based),
797 * We can just load the metadata for the array->
801 /* already loaded */;
802 else if (tst
->ss
->external
) {
803 tst
->ss
->load_container(tst
, fd
, NULL
);
804 } else for (j
= 0; j
< tst
->max_devs
; j
++) {
808 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
810 if (disc
.major
==0 && disc
.minor
==0)
812 if ((disc
.state
& 4)==0) /* sync */
814 /* Looks like a good device to try */
815 dev
= map_dev(disc
.major
, disc
.minor
, 1);
818 dfd
= dev_open(dev
, O_RDONLY
);
821 if (tst
->ss
->load_super(tst
, dfd
,
829 /* FIXME this is a bad test to be using */
830 if (!tst
->sb
&& (dv
->disposition
!= 'a'
831 && dv
->disposition
!= 'S')) {
832 /* we are re-adding a device to a
833 * completely dead array - have to depend
836 } else if (!tst
->sb
) {
837 pr_err("cannot load array metadata from %s\n", devname
);
841 /* Make sure device is large enough */
842 if (dv
->disposition
!= 'j' && /* skip size check for Journal */
844 tst
->ss
->avail_size(tst
, ldsize
/512, INVALID_SECTORS
) <
846 if (dv
->disposition
== 'M')
848 pr_err("%s not large enough to join array\n",
853 /* Possibly this device was recently part of
854 * the array and was temporarily removed, and
855 * is now being re-added. If so, we can
859 if (array
->not_persistent
== 0) {
860 dev_st
= dup_super(tst
);
861 dev_st
->ss
->load_super(dev_st
, tfd
, NULL
);
862 if (dev_st
->sb
&& dv
->disposition
!= 'S') {
865 rv
= attempt_re_add(fd
, tfd
, dv
, dev_st
, tst
,
866 rdev
, update
, devname
,
868 dev_st
->ss
->free_super(dev_st
);
873 if (dv
->disposition
== 'M') {
875 pr_err("--re-add for %s to %s is not possible\n",
876 dv
->devname
, devname
);
879 if (dv
->disposition
== 'A') {
880 pr_err("--re-add for %s to %s is not possible\n",
881 dv
->devname
, devname
);
884 if (array
->active_disks
< array
->raid_disks
) {
885 char *avail
= xcalloc(array
->raid_disks
, 1);
889 for (d
= 0; d
< MAX_DISKS
&& found
< array
->nr_disks
; d
++) {
891 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
893 if (disc
.major
== 0 && disc
.minor
== 0)
895 if (!(disc
.state
& (1<<MD_DISK_SYNC
)))
897 avail
[disc
.raid_disk
] = 1;
900 array_failed
= !enough(array
->level
, array
->raid_disks
,
901 array
->layout
, 1, avail
);
906 pr_err("%s has failed so using --add cannot work and might destroy\n",
908 pr_err("data on %s. You should stop the array and re-assemble it.\n",
913 /* non-persistent. Must ensure that new drive
914 * is at least array->size big.
916 if (ldsize
/512 < array_size
) {
917 pr_err("%s not large enough to join array\n",
922 /* committed to really trying this device now*/
923 remove_partitions(tfd
);
925 /* in 2.6.17 and earlier, version-1 superblocks won't
926 * use the number we write, but will choose a free number.
927 * we must choose the same free number, which requires
928 * starting at 'raid_disks' and counting up
930 for (j
= array
->raid_disks
; j
< tst
->max_devs
; j
++) {
932 if (ioctl(fd
, GET_DISK_INFO
, &disc
))
934 if (disc
.major
==0 && disc
.minor
==0)
936 if (disc
.state
& 8) /* removed */
939 disc
.major
= major(rdev
);
940 disc
.minor
= minor(rdev
);
944 disc
.number
= raid_slot
;
947 /* only add journal to array that supports journaling */
948 if (dv
->disposition
== 'j') {
952 mdp
= sysfs_read(fd
, NULL
, GET_ARRAY_STATE
);
954 pr_err("%s unable to read array state.\n", devname
);
958 if (strncmp(mdp
->sysfs_array_state
, "readonly", 8) != 0) {
960 pr_err("%s is not readonly, cannot add journal.\n", devname
);
966 tst
->ss
->getinfo_super(tst
, &mdi
, NULL
);
967 if (mdi
.journal_device_required
== 0) {
968 pr_err("%s does not support journal device.\n", devname
);
974 if (array
->not_persistent
==0) {
976 if (dv
->disposition
== 'j')
977 disc
.state
|= (1 << MD_DISK_JOURNAL
) | (1 << MD_DISK_SYNC
);
978 if (dv
->writemostly
== FlagSet
)
979 disc
.state
|= 1 << MD_DISK_WRITEMOSTLY
;
980 if (dv
->failfast
== FlagSet
)
981 disc
.state
|= 1 << MD_DISK_FAILFAST
;
982 dfd
= dev_open(dv
->devname
, O_RDWR
| O_EXCL
|O_DIRECT
);
983 if (tst
->ss
->add_to_super(tst
, &disc
, dfd
,
984 dv
->devname
, INVALID_SECTORS
))
986 if (tst
->ss
->write_init_super(tst
))
988 } else if (dv
->disposition
== 'A') {
989 /* this had better be raid1.
990 * As we are "--re-add"ing we must find a spare slot
993 char *used
= xcalloc(array
->raid_disks
, 1);
994 for (j
= 0; j
< tst
->max_devs
; j
++) {
995 mdu_disk_info_t disc2
;
997 if (ioctl(fd
, GET_DISK_INFO
, &disc2
))
999 if (disc2
.major
==0 && disc2
.minor
==0)
1001 if (disc2
.state
& 8) /* removed */
1003 if (disc2
.raid_disk
< 0)
1005 if (disc2
.raid_disk
> array
->raid_disks
)
1007 used
[disc2
.raid_disk
] = 1;
1009 for (j
= 0 ; j
< array
->raid_disks
; j
++)
1012 disc
.state
|= (1<<MD_DISK_SYNC
);
1018 if (array
->state
& (1 << MD_SB_CLUSTERED
)) {
1019 if (dv
->disposition
== 'c')
1020 disc
.state
|= (1 << MD_DISK_CANDIDATE
);
1022 disc
.state
|= (1 << MD_DISK_CLUSTER_ADD
);
1025 if (dv
->writemostly
== FlagSet
)
1026 disc
.state
|= (1 << MD_DISK_WRITEMOSTLY
);
1027 if (dv
->failfast
== FlagSet
)
1028 disc
.state
|= (1 << MD_DISK_FAILFAST
);
1029 if (tst
->ss
->external
) {
1031 * to an external metadata container */
1032 struct mdinfo new_mdi
;
1038 strcpy(devnm
, fd2devnm(fd
));
1040 container_fd
= open_dev_excl(devnm
);
1041 if (container_fd
< 0) {
1042 pr_err("add failed for %s: could not get exclusive access to container\n",
1044 tst
->ss
->free_super(tst
);
1048 Kill(dv
->devname
, NULL
, 0, -1, 0);
1049 dfd
= dev_open(dv
->devname
, O_RDWR
| O_EXCL
|O_DIRECT
);
1050 if (mdmon_running(tst
->container_devnm
))
1051 tst
->update_tail
= &tst
->updates
;
1052 if (tst
->ss
->add_to_super(tst
, &disc
, dfd
,
1053 dv
->devname
, INVALID_SECTORS
)) {
1055 close(container_fd
);
1058 if (tst
->update_tail
)
1059 flush_metadata_updates(tst
);
1061 tst
->ss
->sync_metadata(tst
);
1063 sra
= sysfs_read(container_fd
, NULL
, 0);
1065 pr_err("add failed for %s: sysfs_read failed\n",
1067 close(container_fd
);
1068 tst
->ss
->free_super(tst
);
1071 sra
->array
.level
= LEVEL_CONTAINER
;
1072 /* Need to set data_offset and component_size */
1073 tst
->ss
->getinfo_super(tst
, &new_mdi
, NULL
);
1074 new_mdi
.disk
.major
= disc
.major
;
1075 new_mdi
.disk
.minor
= disc
.minor
;
1076 new_mdi
.recovery_start
= 0;
1077 /* Make sure fds are closed as they are O_EXCL which
1078 * would block add_disk */
1079 tst
->ss
->free_super(tst
);
1080 if (sysfs_add_disk(sra
, &new_mdi
, 0) != 0) {
1081 pr_err("add new device to external metadata failed for %s\n", dv
->devname
);
1082 close(container_fd
);
1086 ping_monitor(devnm
);
1088 close(container_fd
);
1090 tst
->ss
->free_super(tst
);
1091 if (ioctl(fd
, ADD_NEW_DISK
, &disc
)) {
1092 if (dv
->disposition
== 'j')
1093 pr_err("Failed to hot add %s as journal, "
1094 "please try restart %s.\n", dv
->devname
, devname
);
1096 pr_err("add new device failed for %s as %d: %s\n",
1097 dv
->devname
, j
, strerror(errno
));
1100 if (dv
->disposition
== 'j') {
1101 pr_err("Journal added successfully, making %s read-write\n", devname
);
1102 if (Manage_ro(devname
, fd
, -1))
1103 pr_err("Failed to make %s read-write\n", devname
);
1108 pr_err("added %s\n", dv
->devname
);
1112 int Manage_remove(struct supertype
*tst
, int fd
, struct mddev_dev
*dv
,
1113 int sysfd
, unsigned long rdev
, int verbose
, char *devname
)
1118 if (tst
->ss
->external
) {
1119 /* To remove a device from a container, we must
1120 * check that it isn't in use in an array.
1121 * This involves looking in the 'holders'
1122 * directory - there must be just one entry,
1124 * To ensure that it doesn't get used as a
1125 * hot spare while we are checking, we
1126 * get an O_EXCL open on the container
1130 strcpy(devnm
, fd2devnm(fd
));
1131 lfd
= open_dev_excl(devnm
);
1133 pr_err("Cannot get exclusive access to container - odd\n");
1136 /* We may not be able to check on holders in
1137 * sysfs, either because we don't have the dev num
1138 * (rdev == 0) or because the device has been detached
1139 * and the 'holders' directory no longer exists
1140 * (ret == -1). In that case, assume it is OK to
1147 * The drive has already been set to 'faulty', however
1148 * monitor might not have had time to process it and the
1149 * drive might still have an entry in the 'holders'
1150 * directory. Try a few times to avoid a false error
1155 ret
= sysfs_unique_holder(devnm
, rdev
);
1158 usleep(100 * 1000); /* 100ms */
1159 } while (--count
> 0);
1162 pr_err("%s is not a member, cannot remove.\n",
1168 pr_err("%s is still in use, cannot remove.\n",
1175 /* FIXME check that it is a current member */
1177 /* device has been removed and we don't know
1178 * the major:minor number
1180 int n
= write(sysfd
, "remove", 6);
1186 err
= ioctl(fd
, HOT_REMOVE_DISK
, rdev
);
1187 if (err
&& errno
== ENODEV
) {
1188 /* Old kernels rejected this if no personality
1190 struct mdinfo
*sra
= sysfs_read(fd
, NULL
, GET_DEVS
);
1191 struct mdinfo
*dv
= NULL
;
1194 for ( ; dv
; dv
=dv
->next
)
1195 if (dv
->disk
.major
== (int)major(rdev
) &&
1196 dv
->disk
.minor
== (int)minor(rdev
))
1199 err
= sysfs_set_str(sra
, dv
,
1207 pr_err("hot remove failed for %s: %s\n", dv
->devname
,
1213 if (tst
->ss
->external
) {
1215 * Before dropping our exclusive open we make an
1216 * attempt at preventing mdmon from seeing an
1217 * 'add' event before reconciling this 'remove'
1220 char *devnm
= fd2devnm(fd
);
1223 pr_err("unable to get container name\n");
1227 ping_manager(devnm
);
1232 pr_err("hot removed %s from %s\n",
1233 dv
->devname
, devname
);
1237 int Manage_replace(struct supertype
*tst
, int fd
, struct mddev_dev
*dv
,
1238 unsigned long rdev
, int verbose
, char *devname
)
1240 struct mdinfo
*mdi
, *di
;
1241 if (tst
->ss
->external
) {
1242 pr_err("--replace only supported for native metadata (0.90 or 1.x)\n");
1245 /* Need to find the device in sysfs and add 'want_replacement' to the
1248 mdi
= sysfs_read(fd
, NULL
, GET_DEVS
);
1249 if (!mdi
|| !mdi
->devs
) {
1250 pr_err("Cannot find status of %s to enable replacement - strange\n",
1254 for (di
= mdi
->devs
; di
; di
= di
->next
)
1255 if (di
->disk
.major
== (int)major(rdev
) &&
1256 di
->disk
.minor
== (int)minor(rdev
))
1260 if (di
->disk
.raid_disk
< 0) {
1261 pr_err("%s is not active and so cannot be replaced.\n",
1266 rv
= sysfs_set_str(mdi
, di
,
1267 "state", "want_replacement");
1270 pr_err("Failed to request replacement for %s\n",
1275 pr_err("Marked %s (device %d in %s) for replacement\n",
1276 dv
->devname
, di
->disk
.raid_disk
, devname
);
1277 /* If there is a matching 'with', we need to tell it which
1280 while (dv
&& dv
->disposition
!= 'W')
1283 dv
->disposition
= 'w';
1284 dv
->used
= di
->disk
.raid_disk
;
1289 pr_err("%s not found in %s so cannot --replace it\n",
1290 dv
->devname
, devname
);
1294 int Manage_with(struct supertype
*tst
, int fd
, struct mddev_dev
*dv
,
1295 unsigned long rdev
, int verbose
, char *devname
)
1297 struct mdinfo
*mdi
, *di
;
1298 /* try to set 'slot' for 'rdev' in 'fd' to 'dv->used' */
1299 mdi
= sysfs_read(fd
, NULL
, GET_DEVS
|GET_STATE
);
1300 if (!mdi
|| !mdi
->devs
) {
1301 pr_err("Cannot find status of %s to enable replacement - strange\n",
1305 for (di
= mdi
->devs
; di
; di
= di
->next
)
1306 if (di
->disk
.major
== (int)major(rdev
) &&
1307 di
->disk
.minor
== (int)minor(rdev
))
1311 if (di
->disk
.state
& (1<<MD_DISK_FAULTY
)) {
1312 pr_err("%s is faulty and cannot be a replacement\n",
1317 if (di
->disk
.raid_disk
>= 0) {
1318 pr_err("%s is active and cannot be a replacement\n",
1323 rv
= sysfs_set_num(mdi
, di
,
1327 pr_err("Failed to set %s as preferred replacement.\n",
1332 pr_err("Marked %s in %s as replacement for device %d\n",
1333 dv
->devname
, devname
, dv
->used
);
1337 pr_err("%s not found in %s so cannot make it preferred replacement\n",
1338 dv
->devname
, devname
);
1342 int Manage_subdevs(char *devname
, int fd
,
1343 struct mddev_dev
*devlist
, int verbose
, int test
,
1344 char *update
, int force
)
1346 /* Do something to each dev.
1348 * 'a' - add the device
1350 * If that fails EINVAL, try ADD_NEW_DISK
1351 * 'S' - add the device as a spare - don't try re-add
1352 * 'j' - add the device as a journal device
1353 * 'A' - re-add the device
1354 * 'r' - remove the device: HOT_REMOVE_DISK
1355 * device can be 'faulty' or 'detached' in which case all
1356 * matching devices are removed.
1357 * 'f' - set the device faulty SET_DISK_FAULTY
1358 * device can be 'detached' in which case any device that
1359 * is inaccessible will be marked faulty.
1360 * 'R' - mark this device as wanting replacement.
1361 * 'W' - this device is added if necessary and activated as
1362 * a replacement for a previous 'R' device.
1364 * 'w' - 'W' will be changed to 'w' when it is paired with
1365 * a 'R' device. If a 'W' is found while walking the list
1366 * it must be unpaired, and is an error.
1367 * 'M' - this is created by a 'missing' target. It is a slight
1369 * 'F' - Another variant of 'A', where the device was faulty
1370 * so must be removed from the array first.
1371 * 'c' - confirm the device as found (for clustered environments)
1373 * For 'f' and 'r', the device can also be a kernel-internal
1374 * name such as 'sdb'.
1376 mdu_array_info_t array
;
1377 unsigned long long array_size
;
1378 struct mddev_dev
*dv
;
1380 struct supertype
*tst
;
1381 char *subarray
= NULL
;
1383 int count
= 0; /* number of actions taken */
1385 struct mdinfo devinfo
;
1390 if (ioctl(fd
, GET_ARRAY_INFO
, &array
)) {
1391 pr_err("Cannot get array info for %s\n",
1395 sysfs_init(&info
, fd
, NULL
);
1397 /* array.size is only 32 bits and may be truncated.
1398 * So read from sysfs if possible, and record number of sectors
1401 array_size
= get_component_size(fd
);
1402 if (array_size
<= 0)
1403 array_size
= array
.size
* 2;
1405 tst
= super_by_fd(fd
, &subarray
);
1407 pr_err("unsupport array - version %d.%d\n",
1408 array
.major_version
, array
.minor_version
);
1412 for (dv
= devlist
; dv
; dv
= dv
->next
) {
1413 unsigned long rdev
= 0; /* device to add/remove etc */
1418 if (dv
->disposition
== 'c') {
1419 rv
= parse_cluster_confirm_arg(dv
->devname
,
1423 pr_err("Could not get the devname of cluster\n");
1428 if (strcmp(dv
->devname
, "failed") == 0 ||
1429 strcmp(dv
->devname
, "faulty") == 0) {
1430 if (dv
->disposition
!= 'A'
1431 && dv
->disposition
!= 'r') {
1432 pr_err("%s only meaningful with -r or --re-add, not -%c\n",
1433 dv
->devname
, dv
->disposition
);
1436 add_faulty(dv
, fd
, (dv
->disposition
== 'A'
1440 if (strcmp(dv
->devname
, "detached") == 0) {
1441 if (dv
->disposition
!= 'r' && dv
->disposition
!= 'f') {
1442 pr_err("%s only meaningful with -r of -f, not -%c\n",
1443 dv
->devname
, dv
->disposition
);
1446 add_detached(dv
, fd
, dv
->disposition
);
1450 if (strcmp(dv
->devname
, "missing") == 0) {
1451 struct mddev_dev
*add_devlist
;
1452 struct mddev_dev
**dp
;
1453 if (dv
->disposition
== 'c') {
1454 rv
= ioctl(fd
, CLUSTERED_DISK_NACK
, NULL
);
1458 if (dv
->disposition
!= 'A') {
1459 pr_err("'missing' only meaningful with --re-add\n");
1462 add_devlist
= conf_get_devs();
1463 if (add_devlist
== NULL
) {
1464 pr_err("no devices to scan for missing members.");
1467 for (dp
= &add_devlist
; *dp
; dp
= & (*dp
)->next
)
1468 /* 'M' (for 'missing') is like 'A' without errors */
1469 (*dp
)->disposition
= 'M';
1471 dv
->next
= add_devlist
;
1475 if (strncmp(dv
->devname
, "set-", 4) == 0 &&
1476 strlen(dv
->devname
) == 5) {
1479 if (dv
->disposition
!= 'r' &&
1480 dv
->disposition
!= 'f') {
1481 pr_err("'%s' only meaningful with -r or -f\n",
1485 if (array
.level
!= 10) {
1486 pr_err("'%s' only meaningful with RAID10 arrays\n",
1490 copies
= ((array
.layout
& 0xff) *
1491 ((array
.layout
>> 8) & 0xff));
1492 if (array
.raid_disks
% copies
!= 0 ||
1493 dv
->devname
[4] < 'A' ||
1494 dv
->devname
[4] >= 'A' + copies
||
1496 pr_err("'%s' not meaningful with this array\n",
1500 add_set(dv
, fd
, dv
->devname
[4]);
1504 if (strchr(dv
->devname
, '/') == NULL
&&
1505 strchr(dv
->devname
, ':') == NULL
&&
1506 strlen(dv
->devname
) < 50) {
1507 /* Assume this is a kernel-internal name like 'sda1' */
1510 if (dv
->disposition
!= 'r' && dv
->disposition
!= 'f') {
1511 pr_err("%s only meaningful with -r or -f, not -%c\n",
1512 dv
->devname
, dv
->disposition
);
1516 sprintf(dname
, "dev-%s", dv
->devname
);
1517 sysfd
= sysfs_open(fd2devnm(fd
), dname
, "block/dev");
1520 if (sysfs_fd_get_str(sysfd
, dn
, 20) > 0 &&
1521 sscanf(dn
, "%d:%d", &mj
,&mn
) == 2) {
1522 rdev
= makedev(mj
,mn
);
1529 sysfd
= sysfs_open(fd2devnm(fd
), dname
, "state");
1531 pr_err("%s does not appear to be a component of %s\n",
1532 dv
->devname
, devname
);
1536 } else if ((dv
->disposition
== 'r' || dv
->disposition
== 'f')
1537 && get_maj_min(dv
->devname
, &mj
, &mn
)) {
1538 /* for 'fail' and 'remove', the device might
1541 rdev
= makedev(mj
, mn
);
1544 tfd
= dev_open(dv
->devname
, O_RDONLY
);
1549 int open_err
= errno
;
1550 if (stat(dv
->devname
, &stb
) != 0) {
1551 pr_err("Cannot find %s: %s\n",
1552 dv
->devname
, strerror(errno
));
1555 if ((stb
.st_mode
& S_IFMT
) != S_IFBLK
) {
1556 if (dv
->disposition
== 'M')
1557 /* non-fatal. Also improbable */
1559 pr_err("%s is not a block device.\n",
1563 if (dv
->disposition
== 'r')
1564 /* Be happy, the stat worked, that is
1565 * enough for --remove
1569 if (dv
->disposition
== 'M')
1572 pr_err("Cannot open %s: %s\n",
1573 dv
->devname
, strerror(open_err
));
1579 switch(dv
->disposition
){
1581 pr_err("internal error - devmode[%s]=%d\n",
1582 dv
->devname
, dv
->disposition
);
1585 case 'S': /* --add-spare */
1586 case 'j': /* --add-journal */
1588 case 'M': /* --re-add missing */
1589 case 'F': /* --re-add faulty */
1590 case 'c': /* --cluster-confirm */
1591 /* add the device */
1593 pr_err("Cannot add disks to a \'member\' array, perform this operation on the parent container\n");
1597 /* Let's first try to write re-add to sysfs */
1599 (dv
->disposition
== 'A' || dv
->disposition
== 'F')) {
1600 sysfs_init_dev(&devinfo
, rdev
);
1601 if (sysfs_set_str(&info
, &devinfo
, "state", "re-add") == 0) {
1602 pr_err("re-add %s to %s succeed\n",
1603 dv
->devname
, info
.sys_name
);
1608 if (dv
->disposition
== 'F')
1609 /* Need to remove first */
1610 ioctl(fd
, HOT_REMOVE_DISK
, rdev
);
1611 /* Make sure it isn't in use (in 2.6 or later) */
1612 tfd
= dev_open(dv
->devname
, O_RDONLY
|O_EXCL
);
1614 /* We know no-one else is using it. We'll
1615 * need non-exclusive access to add it, so
1619 tfd
= dev_open(dv
->devname
, O_RDONLY
);
1622 if (dv
->disposition
== 'M')
1624 pr_err("Cannot open %s: %s\n",
1625 dv
->devname
, strerror(errno
));
1629 if (sysfs_freeze_array(&info
) == 1)
1634 rv
= Manage_add(fd
, tfd
, dv
, tst
, &array
,
1635 force
, verbose
, devname
, update
,
1636 rdev
, array_size
, raid_slot
);
1648 pr_err("Cannot remove disks from a \'member\' array, perform this operation on the parent container\n");
1651 rv
= Manage_remove(tst
, fd
, dv
, sysfd
,
1663 case 'f': /* set faulty */
1664 /* FIXME check current member */
1665 if ((sysfd
>= 0 && write(sysfd
, "faulty", 6) != 6) ||
1666 (sysfd
< 0 && ioctl(fd
, SET_DISK_FAULTY
,
1670 pr_err("set device faulty failed for %s: %s\n",
1671 dv
->devname
, strerror(errno
));
1681 pr_err("set %s faulty in %s\n",
1682 dv
->devname
, devname
);
1684 case 'R': /* Mark as replaceable */
1686 pr_err("Cannot replace disks in a \'member\' array, perform this operation on the parent container\n");
1690 if (sysfs_freeze_array(&info
) == 1)
1695 rv
= Manage_replace(tst
, fd
, dv
,
1704 case 'W': /* --with device that doesn't match */
1705 pr_err("No matching --replace device for --with %s\n",
1708 case 'w': /* --with device which was matched */
1709 rv
= Manage_with(tst
, fd
, dv
,
1710 rdev
, verbose
, devname
);
1717 sysfs_set_str(&info
, NULL
, "sync_action","idle");
1718 if (test
&& count
== 0)
1724 sysfs_set_str(&info
, NULL
, "sync_action","idle");
1725 return !test
&& busy
? 2 : 1;
1728 int autodetect(void)
1730 /* Open any md device, and issue the RAID_AUTORUN ioctl */
1732 int fd
= dev_open("9:0", O_RDONLY
);
1734 if (ioctl(fd
, RAID_AUTORUN
, 0) == 0)
1741 int Update_subarray(char *dev
, char *subarray
, char *update
, struct mddev_ident
*ident
, int verbose
)
1743 struct supertype supertype
, *st
= &supertype
;
1746 memset(st
, 0, sizeof(*st
));
1748 fd
= open_subarray(dev
, subarray
, st
, verbose
< 0);
1752 if (!st
->ss
->update_subarray
) {
1754 pr_err("Operation not supported for %s metadata\n",
1759 if (mdmon_running(st
->devnm
))
1760 st
->update_tail
= &st
->updates
;
1762 rv
= st
->ss
->update_subarray(st
, subarray
, update
, ident
);
1766 pr_err("Failed to update %s of subarray-%s in %s\n",
1767 update
, subarray
, dev
);
1768 } else if (st
->update_tail
)
1769 flush_metadata_updates(st
);
1771 st
->ss
->sync_metadata(st
);
1773 if (rv
== 0 && strcmp(update
, "name") == 0 && verbose
>= 0)
1774 pr_err("Updated subarray-%s name from %s, UUIDs may have changed\n",
1778 st
->ss
->free_super(st
);
1784 /* Move spare from one array to another If adding to destination array fails
1785 * add back to original array.
1786 * Returns 1 on success, 0 on failure */
1787 int move_spare(char *from_devname
, char *to_devname
, dev_t devid
)
1789 struct mddev_dev devlist
;
1792 /* try to remove and add */
1793 int fd1
= open(to_devname
, O_RDONLY
);
1794 int fd2
= open(from_devname
, O_RDONLY
);
1796 if (fd1
< 0 || fd2
< 0) {
1797 if (fd1
>=0) close(fd1
);
1798 if (fd2
>=0) close(fd2
);
1802 devlist
.next
= NULL
;
1804 devlist
.writemostly
= FlagDefault
;
1805 devlist
.failfast
= FlagDefault
;
1806 devlist
.devname
= devname
;
1807 sprintf(devname
, "%d:%d", major(devid
), minor(devid
));
1809 devlist
.disposition
= 'r';
1810 if (Manage_subdevs(from_devname
, fd2
, &devlist
, -1, 0, NULL
, 0) == 0) {
1811 devlist
.disposition
= 'a';
1812 if (Manage_subdevs(to_devname
, fd1
, &devlist
, -1, 0, NULL
, 0) == 0) {
1813 /* make sure manager is aware of changes */
1814 ping_manager(to_devname
);
1815 ping_manager(from_devname
);
1820 else Manage_subdevs(from_devname
, fd2
, &devlist
, -1, 0, NULL
, 0);