rpc_peeraddr
clp_salen = rpc_peeraddr(clp->cl_rpcclient, clp_sap, sizeof(clp_addr));
rpc_peeraddr(old->cl_rpcclient, old_sap, sizeof(old_addr));
size_t rpc_peeraddr(struct rpc_clnt *, struct sockaddr *, size_t);
EXPORT_SYMBOL_GPL(rpc_peeraddr);
salen = rpc_peeraddr(clnt, sap, sizeof(addr));