NFS: Enable client side NFSv4.1 backchannel to use other transports

Forechannel transports get their own "bc_up" method to create an
endpoint for the backchannel service.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
[Anna Schumaker: Add forward declaration of struct net to xprt.h]
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h
index 82c083946ef0..69ef5b3ab038 100644
--- a/include/linux/sunrpc/xprt.h
+++ b/include/linux/sunrpc/xprt.h
@@ -54,6 +54,8 @@ enum rpc_display_format_t {
 struct rpc_task;
 struct rpc_xprt;
 struct seq_file;
+struct svc_serv;
+struct net;
 
 /*
  * This describes a complete RPC request
@@ -138,6 +140,7 @@ struct rpc_xprt_ops {
         void            (*inject_disconnect)(struct rpc_xprt *xprt);
         int             (*bc_setup)(struct rpc_xprt *xprt,
                                     unsigned int min_reqs);
+        int             (*bc_up)(struct svc_serv *serv, struct net *net);
         void            (*bc_free_rqst)(struct rpc_rqst *rqst);
         void            (*bc_destroy)(struct rpc_xprt *xprt,
                                       unsigned int max_reqs);