]> err.no Git - linux-2.6/commit
md: support blocking writes to an array on device failure
authorDan Williams <dan.j.williams@intel.com>
Wed, 30 Apr 2008 07:52:32 +0000 (00:52 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 30 Apr 2008 15:29:33 +0000 (08:29 -0700)
commit6bfe0b499082fd3950429017cd8ebf2a6c458aa5
tree81476cf7f7ddbea135bdb93729e0bffae0e7c163
parent11e2ede0228ee0f81ccacd15894908c3bf241f73
md: support blocking writes to an array on device failure

Allows a userspace metadata handler to take action upon detecting a device
failure.

Based on an original patch by Neil Brown.

Changes:
-added blocked_wait waitqueue to rdev
-don't qualify Blocked with Faulty always let userspace block writes
-added md_wait_for_blocked_rdev to wait for the block device to be clear, if
 userspace misses the notification another one is sent every 5 seconds
-set MD_RECOVERY_NEEDED after clearing "blocked"
-kill DoBlock flag, just test mddev->external

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/md/md.c
drivers/md/raid1.c
drivers/md/raid10.c
drivers/md/raid5.c
include/linux/raid/md.h
include/linux/raid/md_k.h