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authorStefan Hajnoczi <stefanha@redhat.com>2013-04-15 17:17:31 +0200
committerKevin Wolf <kwolf@redhat.com>2013-04-22 10:27:58 +0200
commitf4d38bef7cc79018e2aa789b0e4c23c3a8cdfca5 (patch)
treea83c3003f7b316626becabac10cfce1390def876 /block/qcow.c
parent68c0aa6e02f79f8825c0c5dc4c7ed25d524aaa8b (diff)
downloadqemu-f4d38bef7cc79018e2aa789b0e4c23c3a8cdfca5.tar.gz
qcow2: allow sub-cluster compressed write to last cluster
Compression in qcow2 requires image length to be a multiple of the cluster size. Lift this requirement by zero-padding the final cluster when necessary. The virtual disk size is still not cluster-aligned, so the guest cannot access the zero sectors. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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