tree d7888b968e32c638ce998c1b7e793d42104072a3
parent ef503a841743ec796af3418424dee7e86275b788
author tianqing <tianqing@unitedstack.com> 1487659803 +0800
committer Jeff Cody <jcody@redhat.com> 1487958181 -0500

RBD: Add support readv,writev for rbd

Rbd can do readv and writev directly, so wo do not need to transform
iov to buf or vice versa any more.

Signed-off-by: tianqing <tianqing@unitedstack.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Signed-off-by: Jeff Cody <jcody@redhat.com>