tree a1e2f657dfafcfbd1e6fe8fde1ccbb8c95d14dec
parent 647cc472232608f268fe48da78bea81e6d01b1ea
author Josh Durgin <josh.durgin@dreamhost.com> 1335853005 -0700
committer Kevin Wolf <kwolf@redhat.com> 1335976902 +0200

rbd: add discard support

Change the write flag to an operation type in RBDAIOCB, and make the
buffer optional since discard doesn't use it.

Discard is first included in librbd 0.1.2 (which is in Ceph 0.46).
If librbd is too old, leave out qemu_rbd_aio_discard entirely,
so the old behavior is preserved.

Signed-off-by: Josh Durgin <josh.durgin@dreamhost.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>