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qcow2: Add bdrv_discard support
authorKevin Wolf <kwolf@redhat.com>
Wed, 26 Jan 2011 15:56:48 +0000 (16:56 +0100)
committerKevin Wolf <kwolf@redhat.com>
Mon, 31 Jan 2011 09:03:00 +0000 (10:03 +0100)
commit5ea929e3d13622e5d06ca8795819f1590644cda2
tree1aba3562b30cf62ac6a8fdc5f313f4a90e816c88tree
parenta9c49a6b023fd3706002fd8d549c58f0343932f8commit | diff
qcow2: Add bdrv_discard support

This adds a bdrv_discard function to qcow2 that frees the discarded clusters.
It does not yet pass the discard on to the underlying file system driver, but
the space can be reused by future writes to the image.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
block/qcow2-cluster.c diff | blob | blame | history
block/qcow2.c diff | blob | blame | history
block/qcow2.h diff | blob | blame | history
Qemu copy for testing