tree b1867e722c1cc679b1834feeeeb21195f57dc873
parent 5b1eacbcd78930d976eb50a93f1779d311b553d1
author Chuck Lever <chuck.lever@oracle.com> 1156291576 -0400
committer Trond Myklebust <Trond.Myklebust@netapp.com> 1158981884 -0400

SUNRPC: Introduce transport switch callout for pluggable rpcbind

Introduce a clean transport switch API for plugging in different types of
rpcbind mechanisms.  For instance, rpcbind can cleanly replace the
existing portmapper client, or a transport can choose to implement RPC
binding any way it likes.

Test plan:
Destructive testing (unplugging the network temporarily).  Connectathon
with UDP and TCP.  NFSv2/3 and NFSv4 mounting should be carefully checked.
Probably need to rig a server where certain services aren't running, or
that returns an error for some typical operation.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>