1 files changed, 133 insertions, 103 deletions

diff --git a/net/tipc/port.h b/net/tipc/port.h
index ff31ee4a1dc..cf4ca5b1d9a 100644
--- a/net/tipc/port.h
+++ b/net/tipc/port.h
@@ -1,8 +1,8 @@
 /*
  * net/tipc/port.h: Include file for TIPC port code
  *
- * Copyright (c) 1994-2007, Ericsson AB
- * Copyright (c) 2004-2007, Wind River Systems
+ * Copyright (c) 1994-2007, 2014, Ericsson AB
+ * Copyright (c) 2004-2007, 2010-2013, Wind River Systems
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -37,65 +37,53 @@
 #ifndef _TIPC_PORT_H
 #define _TIPC_PORT_H
 
-#include "core.h"
 #include "ref.h"
 #include "net.h"
 #include "msg.h"
-#include "dbg.h"
 #include "node_subscr.h"
 
-/**
- * struct user_port - TIPC user port (used with native API)
- * @user_ref: id of user who created user port
- * @usr_handle: user-specified field
- * @ref: object reference to associated TIPC port
- * <various callback routines>
- * @uport_list: adjacent user ports in list of ports held by user
- */
-
-struct user_port {
-	u32 user_ref;
-	void *usr_handle;
-	u32 ref;
-	tipc_msg_err_event err_cb;
-	tipc_named_msg_err_event named_err_cb;
-	tipc_conn_shutdown_event conn_err_cb;
-	tipc_msg_event msg_cb;
-	tipc_named_msg_event named_msg_cb;
-	tipc_conn_msg_event conn_msg_cb;
-	tipc_continue_event continue_event_cb;
-	struct list_head uport_list;
-};
+#define TIPC_CONNACK_INTV         256
+#define TIPC_FLOWCTRL_WIN        (TIPC_CONNACK_INTV * 2)
+#define TIPC_CONN_OVERLOAD_LIMIT ((TIPC_FLOWCTRL_WIN * 2 + 1) * \
+				  SKB_TRUESIZE(TIPC_MAX_USER_MSG_SIZE))
 
 /**
- * struct port - TIPC port structure
- * @publ: TIPC port info available to privileged users
+ * struct tipc_port - TIPC port structure
+ * @lock: pointer to spinlock for controlling access to port
+ * @connected: non-zero if port is currently connected to a peer port
+ * @conn_type: TIPC type used when connection was established
+ * @conn_instance: TIPC instance used when connection was established
+ * @conn_unacked: number of unacknowledged messages received from peer port
+ * @published: non-zero if port has one or more associated names
+ * @congested: non-zero if cannot send because of link or port congestion
+ * @max_pkt: maximum packet size "hint" used when building messages sent by port
+ * @ref: unique reference to port in TIPC object registry
+ * @phdr: preformatted message header used when sending messages
  * @port_list: adjacent ports in TIPC's global list of ports
- * @dispatcher: ptr to routine which handles received messages
- * @wakeup: ptr to routine to call when port is no longer congested
- * @user_port: ptr to user port associated with port (if any)
  * @wait_list: adjacent ports in list of ports waiting on link congestion
- * @congested_link: ptr to congested link port is waiting on
  * @waiting_pkts:
- * @sent:
- * @acked:
+ * @sent: # of non-empty messages sent by port
+ * @acked: # of non-empty message acknowledgements from connected port's peer
  * @publications: list of publications for port
  * @pub_count: total # of publications port has made during its lifetime
  * @probing_state:
  * @probing_interval:
- * @last_in_seqno:
  * @timer_ref:
  * @subscription: "node down" subscription used to terminate failed connections
  */
-
-struct port {
-	struct tipc_port publ;
+struct tipc_port {
+	spinlock_t *lock;
+	int connected;
+	u32 conn_type;
+	u32 conn_instance;
+	u32 conn_unacked;
+	int published;
+	u32 congested;
+	u32 max_pkt;
+	u32 ref;
+	struct tipc_msg phdr;
 	struct list_head port_list;
-	u32 (*dispatcher)(struct tipc_port *, struct sk_buff *);
-	void (*wakeup)(struct tipc_port *);
-	struct user_port *user_port;
 	struct list_head wait_list;
-	struct link *congested_link;
 	u32 waiting_pkts;
 	u32 sent;
 	u32 acked;
@@ -103,32 +91,88 @@ struct port {
 	u32 pub_count;
 	u32 probing_state;
 	u32 probing_interval;
-	u32 last_in_seqno;
 	struct timer_list timer;
 	struct tipc_node_subscr subscription;
 };
 
 extern spinlock_t tipc_port_list_lock;
-struct port_list;
+struct tipc_port_list;
+
+/*
+ * TIPC port manipulation routines
+ */
+u32 tipc_port_init(struct tipc_port *p_ptr,
+		   const unsigned int importance);
+
+int tipc_reject_msg(struct sk_buff *buf, u32 err);
+
+void tipc_acknowledge(u32 port_ref, u32 ack);
+
+void tipc_port_destroy(struct tipc_port *p_ptr);
+
+int tipc_publish(struct tipc_port *p_ptr, unsigned int scope,
+		 struct tipc_name_seq const *name_seq);
+
+int tipc_withdraw(struct tipc_port *p_ptr, unsigned int scope,
+		  struct tipc_name_seq const *name_seq);
+
+int tipc_port_connect(u32 portref, struct tipc_portid const *port);
+
+int tipc_port_disconnect(u32 portref);
+
+int tipc_port_shutdown(u32 ref);
+
+void tipc_port_wakeup(struct tipc_port *port);
+
+/*
+ * The following routines require that the port be locked on entry
+ */
+int __tipc_port_disconnect(struct tipc_port *tp_ptr);
+int __tipc_port_connect(u32 ref, struct tipc_port *p_ptr,
+		   struct tipc_portid const *peer);
+int tipc_port_peer_msg(struct tipc_port *p_ptr, struct tipc_msg *msg);
+
+/*
+ * TIPC messaging routines
+ */
+
+int tipc_send(struct tipc_port *port,
+	      struct iovec const *msg_sect,
+	      unsigned int len);
+
+int tipc_send2name(struct tipc_port *port,
+		   struct tipc_name const *name,
+		   u32 domain,
+		   struct iovec const *msg_sect,
+		   unsigned int len);
+
+int tipc_send2port(struct tipc_port *port,
+		   struct tipc_portid const *dest,
+		   struct iovec const *msg_sect,
+		   unsigned int len);
+
+int tipc_port_mcast_xmit(struct tipc_port *port,
+			 struct tipc_name_seq const *seq,
+			 struct iovec const *msg,
+			 unsigned int len);
+
+int tipc_port_iovec_reject(struct tipc_port *p_ptr,
+			   struct tipc_msg *hdr,
+			   struct iovec const *msg_sect,
+			   unsigned int len,
+			   int err);
 
-int tipc_port_recv_sections(struct port *p_ptr, u32 num_sect,
-			    struct iovec const *msg_sect);
-int tipc_port_reject_sections(struct port *p_ptr, struct tipc_msg *hdr,
-			      struct iovec const *msg_sect, u32 num_sect,
-			      int err);
 struct sk_buff *tipc_port_get_ports(void);
-struct sk_buff *port_show_stats(const void *req_tlv_area, int req_tlv_space);
-void tipc_port_recv_proto_msg(struct sk_buff *buf);
-void tipc_port_recv_mcast(struct sk_buff *buf, struct port_list *dp);
+void tipc_port_proto_rcv(struct sk_buff *buf);
+void tipc_port_mcast_rcv(struct sk_buff *buf, struct tipc_port_list *dp);
 void tipc_port_reinit(void);
 
 /**
  * tipc_port_lock - lock port instance referred to and return its pointer
  */
-
-static inline struct port *tipc_port_lock(u32 ref)
+static inline struct tipc_port *tipc_port_lock(u32 ref)
 {
-	return (struct port *)tipc_ref_lock(ref);
+	return (struct tipc_port *)tipc_ref_lock(ref);
 }
 
 /**
@@ -136,72 +180,58 @@ static inline struct port *tipc_port_lock(u32 ref)
  *
  * Can use pointer instead of tipc_ref_unlock() since port is already locked.
  */
+static inline void tipc_port_unlock(struct tipc_port *p_ptr)
+{
+	spin_unlock_bh(p_ptr->lock);
+}
+
+static inline int tipc_port_congested(struct tipc_port *p_ptr)
+{
+	return ((p_ptr->sent - p_ptr->acked) >= TIPC_FLOWCTRL_WIN);
+}
+
 
-static inline void tipc_port_unlock(struct port *p_ptr)
+static inline u32 tipc_port_peernode(struct tipc_port *p_ptr)
 {
-	spin_unlock_bh(p_ptr->publ.lock);
+	return msg_destnode(&p_ptr->phdr);
 }
 
-static inline struct port* tipc_port_deref(u32 ref)
+static inline u32 tipc_port_peerport(struct tipc_port *p_ptr)
 {
-	return (struct port *)tipc_ref_deref(ref);
+	return msg_destport(&p_ptr->phdr);
 }
 
-static inline u32 tipc_peer_port(struct port *p_ptr)
+static inline  bool tipc_port_unreliable(struct tipc_port *port)
 {
-	return msg_destport(&p_ptr->publ.phdr);
+	return msg_src_droppable(&port->phdr) != 0;
 }
 
-static inline u32 tipc_peer_node(struct port *p_ptr)
+static inline void tipc_port_set_unreliable(struct tipc_port *port,
+					    bool unreliable)
 {
-	return msg_destnode(&p_ptr->publ.phdr);
+	msg_set_src_droppable(&port->phdr, unreliable ? 1 : 0);
 }
 
-static inline int tipc_port_congested(struct port *p_ptr)
+static inline bool tipc_port_unreturnable(struct tipc_port *port)
 {
-	return((p_ptr->sent - p_ptr->acked) >= (TIPC_FLOW_CONTROL_WIN * 2));
+	return msg_dest_droppable(&port->phdr) != 0;
 }
 
-/**
- * tipc_port_recv_msg - receive message from lower layer and deliver to port user
- */
+static inline void tipc_port_set_unreturnable(struct tipc_port *port,
+					     bool unreturnable)
+{
+	msg_set_dest_droppable(&port->phdr, unreturnable ? 1 : 0);
+}
+
+
+static inline int tipc_port_importance(struct tipc_port *port)
+{
+	return msg_importance(&port->phdr);
+}
 
-static inline int tipc_port_recv_msg(struct sk_buff *buf)
+static inline void tipc_port_set_importance(struct tipc_port *port, int imp)
 {
-	struct port *p_ptr;
-	struct tipc_msg *msg = buf_msg(buf);
-	u32 destport = msg_destport(msg);
-	u32 dsz = msg_data_sz(msg);
-	u32 err;
-
-	/* forward unresolved named message */
-	if (unlikely(!destport)) {
-		tipc_net_route_msg(buf);
-		return dsz;
-	}
-
-	/* validate destination & pass to port, otherwise reject message */
-	p_ptr = tipc_port_lock(destport);
-	if (likely(p_ptr)) {
-		if (likely(p_ptr->publ.connected)) {
-			if ((unlikely(msg_origport(msg) != tipc_peer_port(p_ptr))) ||
-			    (unlikely(msg_orignode(msg) != tipc_peer_node(p_ptr))) ||
-			    (unlikely(!msg_connected(msg)))) {
-				err = TIPC_ERR_NO_PORT;
-				tipc_port_unlock(p_ptr);
-				goto reject;
-			}
-		}
-		err = p_ptr->dispatcher(&p_ptr->publ, buf);
-		tipc_port_unlock(p_ptr);
-		if (likely(!err))
-			return dsz;
-	} else {
-		err = TIPC_ERR_NO_PORT;
-	}
-reject:
-	dbg("port->rejecting, err = %x..\n",err);
-	return tipc_reject_msg(buf, err);
+	msg_set_importance(&port->phdr, (u32)imp);
 }
 
 #endif