SUNRPC: Provide a new API for registering transport implementations

To allow transport capabilities to be loaded dynamically, provide an API
for registering and unregistering the transports with the RPC client.
Eventually xprt_create_transport() will be changed to search the list of
registered transports when initializing a fresh transport.

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

1 files changed, 11 insertions, 0 deletions

diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h
index 513b0657e14d..7b6b137eca97 100644
--- a/include/linux/sunrpc/xprt.h
+++ b/include/linux/sunrpc/xprt.h
@@ -208,6 +208,15 @@ struct rpc_xprtsock_create {
         struct rpc_timeout *    timeout;        /* optional timeout parameters */
 };
 
+struct xprt_class {
+        struct list_head        list;
+        unsigned short          family;
+        int                     protocol;
+        struct rpc_xprt *       (*setup)(struct rpc_xprtsock_create *);
+        struct module           *owner;
+        char                    name[32];
+};
+
 /*
  * Transport operations used by ULPs
  */
@@ -239,6 +248,8 @@ static inline __be32 *xprt_skip_transport_header(struct rpc_xprt *xprt, __be32 *
 /*
  * Transport switch helper functions
  */
+int                     xprt_register_transport(struct xprt_class *type);
+int                     xprt_unregister_transport(struct xprt_class *type);
 void                    xprt_set_retrans_timeout_def(struct rpc_task *task);
 void                    xprt_set_retrans_timeout_rtt(struct rpc_task *task);
 void                    xprt_wake_pending_tasks(struct rpc_xprt *xprt, int status);