K 10 svn:author V 8 rmacklem K 8 svn:date V 27 2011-12-10T23:26:24.389852Z K 7 svn:log V 317 Define a new CLSET_BACKCHANNEL for the kernel rpc. This can be used to set up a backchannel on a TCP RPC socket. A backchannel allows RPC messages to travel in the opposite direction, with an RPC request from the server to client and an RPC reply from the client to server. This is used by NFSv4.1 for callback RPCs. END