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Changpeng Liu authored
In commit 88c85538, "virtio-blk: add discard and write zeroes features to specification" (https://github.com/oasis-tcs/virtio-spec), the virtio block specification has been extended to add VIRTIO_BLK_T_DISCARD and VIRTIO_BLK_T_WRITE_ZEROES commands. This patch enables support for discard and write zeroes in the virtio-blk driver when the device advertises the corresponding features, VIRTIO_BLK_F_DISCARD and VIRTIO_BLK_F_WRITE_ZEROES. Signed-off-by:
Changpeng Liu <changpeng.liu@intel.com> Signed-off-by:
Daniel Verkamp <dverkamp@chromium.org> Signed-off-by:
Michael S. Tsirkin <mst@redhat.com> Reviewed-by:
Stefan Hajnoczi <stefanha@redhat.com>
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