sunrpc: Tag rpc_xprt with net

The net is known from the xprt_create and this tagging will also
give un the context in the conntection workers where real sockets
are created.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

include/linux/sunrpc/xprt.h

@@ -224,6 +224,7 @@ struct rpc_xprt {
 					bklog_u;	/* backlog queue utilization */
 	} stat;
 
+	struct net		*xprt_net;
 	const char		*address_strings[RPC_DISPLAY_MAX];
 };
 
@@ -281,7 +282,7 @@ void			xprt_release_xprt_cong(struct rpc_xprt *xprt, struct rpc_task *task);
 void			xprt_release(struct rpc_task *task);
 struct rpc_xprt *	xprt_get(struct rpc_xprt *xprt);
 void			xprt_put(struct rpc_xprt *xprt);
-struct rpc_xprt *	xprt_alloc(int size, int max_req);
+struct rpc_xprt *	xprt_alloc(struct net *net, int size, int max_req);
 void			xprt_free(struct rpc_xprt *);
 
 static inline __be32 *xprt_skip_transport_header(struct rpc_xprt *xprt, __be32 *p)

net/sunrpc/xprt.c

@@ -962,7 +962,7 @@ static void xprt_free_slot(struct rpc_xprt *xprt, struct rpc_rqst *req)
 	spin_unlock(&xprt->reserve_lock);
 }
 
-struct rpc_xprt *xprt_alloc(int size, int max_req)
+struct rpc_xprt *xprt_alloc(struct net *net, int size, int max_req)
 {
 	struct rpc_xprt *xprt;
 
@@ -975,6 +975,7 @@ struct rpc_xprt *xprt_alloc(int size, int max_req)
 	if (xprt->slot == NULL)
 		goto out_free;
 
+	xprt->xprt_net = get_net(net);
 	return xprt;
 
 out_free:
@@ -986,6 +987,7 @@ EXPORT_SYMBOL_GPL(xprt_alloc);
 
 void xprt_free(struct rpc_xprt *xprt)
 {
+	put_net(xprt->xprt_net);
 	kfree(xprt->slot);
 	kfree(xprt);
 }

net/sunrpc/xprtrdma/transport.c

@@ -283,7 +283,7 @@ xprt_setup_rdma(struct xprt_create *args)
 		return ERR_PTR(-EBADF);
 	}
 
-	xprt = xprt_alloc(sizeof(struct rpcrdma_xprt),
+	xprt = xprt_alloc(args->net, sizeof(struct rpcrdma_xprt),
 			xprt_rdma_slot_table_entries);
 	if (xprt == NULL) {
 		dprintk("RPC:       %s: couldn't allocate rpcrdma_xprt\n",

net/sunrpc/xprtsock.c

@@ -2272,7 +2272,7 @@ static struct rpc_xprt *xs_setup_xprt(struct xprt_create *args,
 		return ERR_PTR(-EBADF);
 	}
 
-	xprt = xprt_alloc(sizeof(*new), slot_table_size);
+	xprt = xprt_alloc(args->net, sizeof(*new), slot_table_size);
 	if (xprt == NULL) {
 		dprintk("RPC:       xs_setup_xprt: couldn't allocate "
 				"rpc_xprt\n");