lockd: Use xdrgen XDR functions for the NLMv3 GRANTED_MSG procedure

Continue the xdrgen migration by converting NLMv3 GRANTED_MSG,
the async counterpart to GRANTED that a remote NLM uses to tell
this lockd that a previously blocked client lock request has
become available. The procedure now uses
nlm_svc_decode_nlm_testargs and nlm_svc_encode_void, generated
from the NLM version 3 protocol specification. The procedure
handler reaches the xdrgen types through the
nlm_testargs_wrapper structure, which bridges between generated
code and the legacy lockd_lock representation.

Setting pc_argzero to zero is safe because the generated decoder
fills the argp->xdrgen subfields before the procedure runs, so
the zeroing memset performed by the dispatch layer is not
needed. The lock member of the wrapper is populated explicitly
in __nlmsvc_proc_granted_msg() by nlm_lock_to_lockd_lock()
rather than relying on zero-initialization.

The NLM async callback mechanism uses client-side functions
which continue to take legacy results like struct lockd_res,
preventing GRANTED and GRANTED_MSG from sharing code for now.

Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

0 files changed, 0 insertions, 0 deletions