tree 992f754485b3f78503b7e4f68835da4438786c09
parent 47525e59e40ffb8cbc944c0055e9c4902cd3ee99
author Jonathan Brassow <jbrassow@redhat.com> 1337658930 +1000
committer NeilBrown <neilb@suse.de> 1337658930 +1000

DM RAID: Record and handle missing devices

Missing dm-raid devices should be recorded in the superblock

When specifying the devices that compose a DM RAID array, it is possible to denote
failed or missing devices with '-'s.  When this occurs, we must record this in the
superblock.  We do this by checking if the array position's data device is missing
and then forcing MD to record the superblock by setting 'MD_CHANGE_DEVS' in
'raid_resume'.  If we do not cause the superblock to be rewritten by the resume
function, it is possible for a stale superblock to be written by an out-going
in-active table (during 'raid_dtr').

Signed-off-by: Jonathan Brassow <jbrassow@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.de>