[PATCH net-next 2/7] tipc: remove redundant 'peer_name' field in struct tipc_sock

[Jon Maloy <jon.maloy@ericsson.com>]

The field 'peer_name' in struct tipc_sock is redundant, since
this information already is available from tipc_port, to which
tipc_sock has a reference.

We remove the field, and ensure that peer node and peer port
info instead is fetched via the functions that already exist
for this purpose.

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
---
 net/tipc/port.c   |   25 +++++++------------------
 net/tipc/port.h   |   11 +++++++++++
 net/tipc/socket.c |   21 ++++++++++++---------
 3 files changed, 30 insertions(+), 27 deletions(-)

diff --git a/net/tipc/port.c b/net/tipc/port.c
index c7c2b54..d1abe11 100644
--- a/net/tipc/port.c
+++ b/net/tipc/port.c
@@ -54,17 +54,6 @@ static struct sk_buff *port_build_self_abort_msg(struct tipc_port *, u32 err);
 static struct sk_buff *port_build_peer_abort_msg(struct tipc_port *, u32 err);
 static void port_timeout(unsigned long ref);
 
-
-static u32 port_peernode(struct tipc_port *p_ptr)
-{
-	return msg_destnode(&p_ptr->phdr);
-}
-
-static u32 port_peerport(struct tipc_port *p_ptr)
-{
-	return msg_destport(&p_ptr->phdr);
-}
-
 /**
  * tipc_port_peer_msg - verify message was sent by connected port's peer
  *
@@ -76,11 +65,11 @@ int tipc_port_peer_msg(struct tipc_port *p_ptr, struct tipc_msg *msg)
 	u32 peernode;
 	u32 orignode;
 
-	if (msg_origport(msg) != port_peerport(p_ptr))
+	if (msg_origport(msg) != tipc_port_peerport(p_ptr))
 		return 0;
 
 	orignode = msg_orignode(msg);
-	peernode = port_peernode(p_ptr);
+	peernode = tipc_port_peernode(p_ptr);
 	return (orignode == peernode) ||
 		(!orignode && (peernode == tipc_own_addr)) ||
 		(!peernode && (orignode == tipc_own_addr));
@@ -351,8 +340,8 @@ static struct sk_buff *port_build_proto_msg(struct tipc_port *p_ptr,
 	if (buf) {
 		msg = buf_msg(buf);
 		tipc_msg_init(msg, CONN_MANAGER, type, INT_H_SIZE,
-			      port_peernode(p_ptr));
-		msg_set_destport(msg, port_peerport(p_ptr));
+			      tipc_port_peernode(p_ptr));
+		msg_set_destport(msg, tipc_port_peerport(p_ptr));
 		msg_set_origport(msg, p_ptr->ref);
 		msg_set_msgcnt(msg, ack);
 	}
@@ -585,8 +574,8 @@ static int port_print(struct tipc_port *p_ptr, char *buf, int len, int full_id)
 		ret = tipc_snprintf(buf, len, "%-10u:", p_ptr->ref);
 
 	if (p_ptr->connected) {
-		u32 dport = port_peerport(p_ptr);
-		u32 destnode = port_peernode(p_ptr);
+		u32 dport = tipc_port_peerport(p_ptr);
+		u32 destnode = tipc_port_peernode(p_ptr);
 
 		ret += tipc_snprintf(buf + ret, len - ret,
 				     " connected to <%u.%u.%u:%u>",
@@ -926,7 +915,7 @@ int tipc_send(u32 ref, struct iovec const *msg_sect, unsigned int len)
 
 	p_ptr->congested = 1;
 	if (!tipc_port_congested(p_ptr)) {
-		destnode = port_peernode(p_ptr);
+		destnode = tipc_port_peernode(p_ptr);
 		if (likely(!in_own_node(destnode)))
 			res = tipc_link_iovec_xmit_fast(p_ptr, msg_sect, len,
 							destnode);
diff --git a/net/tipc/port.h b/net/tipc/port.h
index 3ec3e94..4a2a1ac 100644
--- a/net/tipc/port.h
+++ b/net/tipc/port.h
@@ -198,4 +198,15 @@ static inline int tipc_port_congested(struct tipc_port *p_ptr)
 	return (p_ptr->sent - p_ptr->acked) >= (TIPC_FLOW_CONTROL_WIN * 2);
 }
 
+
+static inline u32 tipc_port_peernode(struct tipc_port *p_ptr)
+{
+	return msg_destnode(&p_ptr->phdr);
+}
+
+static inline u32 tipc_port_peerport(struct tipc_port *p_ptr)
+{
+	return msg_destport(&p_ptr->phdr);
+}
+
 #endif
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 336e18d..6265577 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -48,7 +48,6 @@
 struct tipc_sock {
 	struct sock sk;
 	struct tipc_port *p;
-	struct tipc_portid peer_name;
 	unsigned int conn_timeout;
 };
 
@@ -445,8 +444,9 @@ static int tipc_getname(struct socket *sock, struct sockaddr *uaddr,
 		if ((sock->state != SS_CONNECTED) &&
 			((peer != 2) || (sock->state != SS_DISCONNECTING)))
 			return -ENOTCONN;
-		addr->addr.id.ref = tsock->peer_name.ref;
-		addr->addr.id.node = tsock->peer_name.node;
+
+		addr->addr.id.ref = tipc_port_peerport(tsock->p);
+		addr->addr.id.node = tipc_port_peernode(tsock->p);
 	} else {
 		addr->addr.id.ref = tsock->p->ref;
 		addr->addr.id.node = tipc_own_addr;
@@ -881,14 +881,16 @@ static int auto_connect(struct socket *sock, struct tipc_msg *msg)
 {
 	struct tipc_sock *tsock = tipc_sk(sock->sk);
 	struct tipc_port *p_ptr;
+	struct tipc_portid peer;
+
+	peer.ref = msg_origport(msg);
+	peer.node = msg_orignode(msg);
 
-	tsock->peer_name.ref = msg_origport(msg);
-	tsock->peer_name.node = msg_orignode(msg);
 	p_ptr = tipc_port_deref(tsock->p->ref);
 	if (!p_ptr)
 		return -EINVAL;
 
-	__tipc_port_connect(tsock->p->ref, p_ptr, &tsock->peer_name);
+	__tipc_port_connect(p_ptr->ref, p_ptr, &peer);
 
 	if (msg_importance(msg) > TIPC_CRITICAL_IMPORTANCE)
 		return -EINVAL;
@@ -1662,6 +1664,7 @@ static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags)
 	struct tipc_sock *new_tsock;
 	struct tipc_port *new_tport;
 	struct tipc_msg *msg;
+	struct tipc_portid peer;
 	u32 new_ref;
 	long timeo;
 	int res;
@@ -1700,9 +1703,9 @@ static int tipc_accept(struct socket *sock, struct socket *new_sock, int flags)
 	reject_rx_queue(new_sk);
 
 	/* Connect new socket to it's peer */
-	new_tsock->peer_name.ref = msg_origport(msg);
-	new_tsock->peer_name.node = msg_orignode(msg);
-	tipc_port_connect(new_ref, &new_tsock->peer_name);
+	peer.ref = msg_origport(msg);
+	peer.node = msg_orignode(msg);
+	tipc_port_connect(new_ref, &peer);
 	new_sock->state = SS_CONNECTED;
 
 	tipc_set_portimportance(new_ref, msg_importance(msg));
-- 
1.7.9.5