SUNRPC: use sockaddr + size when creating remote transport endpoints

Prepare for more generic transport endpoint handling needed by transports
that might use different forms of addressing, such as IPv6.

Introduce a single function call to replace the two-call
xprt_create_proto/rpc_create_client API.  Define a new rpc_create_args
structure that allows callers to pass in remote endpoint addresses of
varying length.

Test-plan:
Compile kernel with CONFIG_NFS enabled.

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

2 files changed, 23 insertions, 0 deletions

diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h
index a26d69583c7a..7817ba82f1b2 100644
--- a/include/linux/sunrpc/clnt.h
+++ b/include/linux/sunrpc/clnt.h
@@ -97,6 +97,28 @@ struct rpc_clnt *rpc_create_client(struct rpc_xprt *xprt, char *servname,
 struct rpc_clnt *rpc_new_client(struct rpc_xprt *xprt, char *servname,
                                 struct rpc_program *info,
                                 u32 version, rpc_authflavor_t authflavor);
+
+struct rpc_create_args {
+        int                     protocol;
+        struct sockaddr         *address;
+        size_t                  addrsize;
+        struct rpc_timeout      *timeout;
+        char                    *servername;
+        struct rpc_program      *program;
+        u32                     version;
+        rpc_authflavor_t        authflavor;
+        unsigned long           flags;
+};
+
+/* Values for "flags" field */
+#define RPC_CLNT_CREATE_HARDRTRY        (1UL << 0)
+#define RPC_CLNT_CREATE_INTR            (1UL << 1)
+#define RPC_CLNT_CREATE_AUTOBIND        (1UL << 2)
+#define RPC_CLNT_CREATE_ONESHOT         (1UL << 3)
+#define RPC_CLNT_CREATE_NONPRIVPORT     (1UL << 4)
+#define RPC_CLNT_CREATE_NOPING          (1UL << 5)
+
+struct rpc_clnt *rpc_create(struct rpc_create_args *args);
 struct rpc_clnt *rpc_bind_new_program(struct rpc_clnt *,
                                 struct rpc_program *, int);
 struct rpc_clnt *rpc_clone_client(struct rpc_clnt *);
diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h
index fc05cfbd5805..bc80fcfdd892 100644
--- a/include/linux/sunrpc/xprt.h
+++ b/include/linux/sunrpc/xprt.h
@@ -237,6 +237,7 @@ void			xprt_set_timeout(struct rpc_timeout *to, unsigned int retr, unsigned long
 /*
  * Generic internal transport functions
  */
+struct rpc_xprt *       xprt_create_transport(int proto, struct sockaddr *addr, size_t size, struct rpc_timeout *toparms);
 void                    xprt_connect(struct rpc_task *task);
 void                    xprt_reserve(struct rpc_task *task);
 int                     xprt_reserve_xprt(struct rpc_task *task);