lockd: Use xdrgen XDR functions for the NLMv3 LOCK_MSG procedure

Continue the xdrgen migration by converting NLMv3 LOCK_MSG, the
async counterpart to LOCK that clients use to request locks that
may block. The procedure now uses nlm_svc_decode_nlm_lockargs and
nlm_svc_encode_void, generated from the NLM version 3 protocol
specification. The procedure handler reaches the xdrgen types
through the nlm_lockargs_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
nlm3svc_lookup_file() 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
LOCK and LOCK_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