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authorDan Williams <dan.j.williams@intel.com>2008-04-30 00:52:32 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-30 08:29:33 -0700
commit6bfe0b499082fd3950429017cd8ebf2a6c458aa5 (patch)
tree81476cf7f7ddbea135bdb93729e0bffae0e7c163 /fs/isofs
parent11e2ede0228ee0f81ccacd15894908c3bf241f73 (diff)
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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>
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