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authorMikulas Patocka <mpatocka@redhat.com>2010-08-12 03:13:51 (GMT)
committerAlasdair G Kergon <agk@redhat.com>2010-08-12 03:13:51 (GMT)
commitc24110450650f17f7d3ba4fbe01f01ac5a115456 (patch)
tree8b5bff17f77c995099d93b2b4a32bc306962a0bf /fs/ext4
parent1e5554c8428bc7209a83e2d07ca724be4d981ce3 (diff)
downloadlinux-fsl-qoriq-c24110450650f17f7d3ba4fbe01f01ac5a115456.tar.xz
dm snapshot: test chunk size against both origin and snapshot
Validate chunk size against both origin and snapshot sector size Don't allow chunk size smaller than either origin or snapshot logical sector size. Reading or writing data not aligned to sector size is not allowed and causes immediate errors. This requires us to open the origin before initialising the exception store and to export dm_snap_origin. Cc: stable@kernel.org Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Reviewed-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
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