tree bb40f7c63e44044c52d540f73c65c8b16ca1726c
parent 766a78882ddf79b162243649d7dfdbac1fb6fb88
author Joe Thornber <ejt@redhat.com> 1422272301 +0000
committer Mike Snitzer <snitzer@redhat.com> 1422457234 -0500

dm thin: don't allow messages to be sent to a pool target in READ_ONLY or FAIL mode

You can't modify the metadata in these modes.  It's better to fail these
messages immediately than let the block-manager deny write locks on
metadata blocks.  Otherwise these failed metadata changes will trigger
'needs_check' to get set in the metadata superblock -- requiring repair
using the thin_check utility.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org