SUNRPC: Eliminate xprt_create_proto and rpc_create_client

The two function call API for creating a new RPC client is now obsolete.
Remove it.

Also, remove an unnecessary check to see whether the caller is capable of
using privileged network services.  The kernel RPC client always uses a
privileged ephemeral port by default; callers are responsible for checking
the authority of users to make use of any RPC service, or for specifying
that a nonprivileged port is acceptable.

Test plan:
Repeated runs of Connectathon locking suite.  Check network trace to ensure
correctness of NLM requests and replies.

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

4 files changed, 1 insertions, 125 deletions

diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index dbb93bd..428704d 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -97,17 +97,7 @@ rpc_setup_pipedir(struct rpc_clnt *clnt, char *dir_name)
 	}
 }
 
-/*
- * Create an RPC client
- * FIXME: This should also take a flags argument (as in task->tk_flags).
- * It's called (among others) from pmap_create_client, which may in
- * turn be called by an async task. In this case, rpciod should not be
- * made to sleep too long.
- */
-struct rpc_clnt *
-rpc_new_client(struct rpc_xprt *xprt, char *servname,
-		  struct rpc_program *program, u32 vers,
-		  rpc_authflavor_t flavor)
+static struct rpc_clnt * rpc_new_client(struct rpc_xprt *xprt, char *servname, struct rpc_program *program, u32 vers, rpc_authflavor_t flavor)
 {
 	struct rpc_version	*version;
 	struct rpc_clnt		*clnt = NULL;
@@ -253,36 +243,6 @@ struct rpc_clnt *rpc_create(struct rpc_create_args *args)
 }
 EXPORT_SYMBOL(rpc_create);
 
-/**
- * Create an RPC client
- * @xprt - pointer to xprt struct
- * @servname - name of server
- * @info - rpc_program
- * @version - rpc_program version
- * @authflavor - rpc_auth flavour to use
- *
- * Creates an RPC client structure, then pings the server in order to
- * determine if it is up, and if it supports this program and version.
- *
- * This function should never be called by asynchronous tasks such as
- * the portmapper.
- */
-struct rpc_clnt *rpc_create_client(struct rpc_xprt *xprt, char *servname,
-		struct rpc_program *info, u32 version, rpc_authflavor_t authflavor)
-{
-	struct rpc_clnt *clnt;
-	int err;
-	
-	clnt = rpc_new_client(xprt, servname, info, version, authflavor);
-	if (IS_ERR(clnt))
-		return clnt;
-	err = rpc_ping(clnt, RPC_TASK_SOFT|RPC_TASK_NOINTR);
-	if (err == 0)
-		return clnt;
-	rpc_shutdown_client(clnt);
-	return ERR_PTR(err);
-}
-
 /*
  * This function clones the RPC client structure. It allows us to share the
  * same transport while varying parameters such as the authentication
diff --git a/net/sunrpc/sunrpc_syms.c b/net/sunrpc/sunrpc_syms.c
index f38f939c..26c0531 100644
--- a/net/sunrpc/sunrpc_syms.c
+++ b/net/sunrpc/sunrpc_syms.c
@@ -36,8 +36,6 @@ EXPORT_SYMBOL(rpc_wake_up_status);
 EXPORT_SYMBOL(rpc_release_task);
 
 /* RPC client functions */
-EXPORT_SYMBOL(rpc_create_client);
-EXPORT_SYMBOL(rpc_new_client);
 EXPORT_SYMBOL(rpc_clone_client);
 EXPORT_SYMBOL(rpc_bind_new_program);
 EXPORT_SYMBOL(rpc_destroy_client);
@@ -57,7 +55,6 @@ EXPORT_SYMBOL(rpc_queue_upcall);
 EXPORT_SYMBOL(rpc_mkpipe);
 
 /* Client transport */
-EXPORT_SYMBOL(xprt_create_proto);
 EXPORT_SYMBOL(xprt_set_timeout);
 
 /* Client credential cache */
diff --git a/net/sunrpc/xprt.c b/net/sunrpc/xprt.c
index 17f56cf..e4f64fb 100644
--- a/net/sunrpc/xprt.c
+++ b/net/sunrpc/xprt.c
@@ -962,85 +962,6 @@ struct rpc_xprt *xprt_create_transport(int proto, struct sockaddr *ap, size_t si
 	return xprt;
 }
 
-static struct rpc_xprt *xprt_setup(int proto, struct sockaddr_in *ap, struct rpc_timeout *to)
-{
-	int result;
-	struct rpc_xprt	*xprt;
-	struct rpc_rqst	*req;
-
-	if ((xprt = kzalloc(sizeof(struct rpc_xprt), GFP_KERNEL)) == NULL)
-		return ERR_PTR(-ENOMEM);
-
-	memcpy(&xprt->addr, ap, sizeof(*ap));
-	xprt->addrlen = sizeof(*ap);
-
-	switch (proto) {
-	case IPPROTO_UDP:
-		result = xs_setup_udp(xprt, to);
-		break;
-	case IPPROTO_TCP:
-		result = xs_setup_tcp(xprt, to);
-		break;
-	default:
-		printk(KERN_ERR "RPC: unrecognized transport protocol: %d\n",
-				proto);
-		result = -EIO;
-		break;
-	}
-	if (result) {
-		kfree(xprt);
-		return ERR_PTR(result);
-	}
-
-	spin_lock_init(&xprt->transport_lock);
-	spin_lock_init(&xprt->reserve_lock);
-
-	INIT_LIST_HEAD(&xprt->free);
-	INIT_LIST_HEAD(&xprt->recv);
-	INIT_WORK(&xprt->task_cleanup, xprt_autoclose, xprt);
-	init_timer(&xprt->timer);
-	xprt->timer.function = xprt_init_autodisconnect;
-	xprt->timer.data = (unsigned long) xprt;
-	xprt->last_used = jiffies;
-	xprt->cwnd = RPC_INITCWND;
-
-	rpc_init_wait_queue(&xprt->binding, "xprt_binding");
-	rpc_init_wait_queue(&xprt->pending, "xprt_pending");
-	rpc_init_wait_queue(&xprt->sending, "xprt_sending");
-	rpc_init_wait_queue(&xprt->resend, "xprt_resend");
-	rpc_init_priority_wait_queue(&xprt->backlog, "xprt_backlog");
-
-	/* initialize free list */
-	for (req = &xprt->slot[xprt->max_reqs-1]; req >= &xprt->slot[0]; req--)
-		list_add(&req->rq_list, &xprt->free);
-
-	xprt_init_xid(xprt);
-
-	dprintk("RPC:      created transport %p with %u slots\n", xprt,
-			xprt->max_reqs);
-	
-	return xprt;
-}
-
-/**
- * xprt_create_proto - create an RPC client transport
- * @proto: requested transport protocol
- * @sap: remote peer's address
- * @to: timeout parameters for new transport
- *
- */
-struct rpc_xprt *xprt_create_proto(int proto, struct sockaddr_in *sap, struct rpc_timeout *to)
-{
-	struct rpc_xprt	*xprt;
-
-	xprt = xprt_setup(proto, sap, to);
-	if (IS_ERR(xprt))
-		dprintk("RPC:      xprt_create_proto failed\n");
-	else
-		dprintk("RPC:      xprt_create_proto created xprt %p\n", xprt);
-	return xprt;
-}
-
 /**
  * xprt_destroy - destroy an RPC transport, killing off all requests.
  * @xprt: transport to destroy
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c
index 17179aa..0b84fab 100644
--- a/net/sunrpc/xprtsock.c
+++ b/net/sunrpc/xprtsock.c
@@ -1376,7 +1376,6 @@ int xs_setup_udp(struct rpc_xprt *xprt, struct rpc_timeout *to)
 
 	xprt->prot = IPPROTO_UDP;
 	xprt->tsh_size = 0;
-	xprt->resvport = capable(CAP_NET_BIND_SERVICE) ? 1 : 0;
 	/* XXX: header size can vary due to auth type, IPv6, etc. */
 	xprt->max_payload = (1U << 16) - (MAX_HEADER << 3);
 
@@ -1423,7 +1422,6 @@ int xs_setup_tcp(struct rpc_xprt *xprt, struct rpc_timeout *to)
 
 	xprt->prot = IPPROTO_TCP;
 	xprt->tsh_size = sizeof(rpc_fraghdr) / sizeof(u32);
-	xprt->resvport = capable(CAP_NET_BIND_SERVICE) ? 1 : 0;
 	xprt->max_payload = RPC_MAX_FRAGMENT_SIZE;
 
 	INIT_WORK(&xprt->connect_worker, xs_tcp_connect_worker, xprt);