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[PATCH] md: allow a manual resync with md

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You can trigger a 'check' with
  echo check > /sys/block/mdX/md/scan_mode
or a check-and-repair errors with
  echo repair > /sys/block/mdX/md/scan_mode

and read the current state from the same file.

Note: personalities need to know the different between 'check' and 'repair',
but don't yet.  Until they do, 'check' will be the same as 'repair' and will
just do a normal resync pass.

Signed-off-by: Neil Brown <neilb@suse.de>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
NeilBrown 2005-11-08 21:39:26 -08:00 • committed by Linus Torvalds
parent 3f294f4fb6
commit 24dd469d72
2 changed files with 72 additions and 9 deletions
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4
include/linux/raid/md_k.h
View file

@ -182,6 +182,8 @@ struct mddev_s
* ERR: and IO error was detected - abort the resync/recovery
* INTR: someone requested a (clean) early abort.
* DONE: thread is done and is waiting to be reaped
* REQUEST: user-space has requested a sync (used with SYNC)
* CHECK: user-space request for for check-only, no repair
*/
#define MD_RECOVERY_RUNNING 0
#define MD_RECOVERY_SYNC 1
@ -189,6 +191,8 @@ struct mddev_s
#define MD_RECOVERY_INTR 3
#define MD_RECOVERY_DONE 4
#define MD_RECOVERY_NEEDED 5
#define MD_RECOVERY_REQUESTED 6
#define MD_RECOVERY_CHECK 7
unsigned long recovery;
int in_sync; /* know to not need resync */