tree 142793b8ae8e6fef8b1aa412cf39e2340091fdf9
parent d54f10bba7635b5ad8b750afd2bb2f0f8eb68b45
author Anthony Liguori <aliguori@us.ibm.com> 1292601502 +0000
committer Kevin Wolf <kwolf@redhat.com> 1302689201 +0200

qed: Add support for zero clusters

Zero clusters are similar to unallocated clusters except instead of reading
their value from a backing file when one is available, the cluster is always
read as zero.

This implements read support only.  At this stage, QED will never write a
zero cluster.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>