2 * net/tipc/port.h: Include file for TIPC port code
4 * Copyright (c) 1994-2007, 2014, Ericsson AB
5 * Copyright (c) 2004-2007, 2010-2013, Wind River Systems
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43 #include "node_subscr.h"
45 #define TIPC_CONNACK_INTV 256
46 #define TIPC_FLOWCTRL_WIN (TIPC_CONNACK_INTV * 2)
47 #define TIPC_CONN_OVERLOAD_LIMIT ((TIPC_FLOWCTRL_WIN * 2 + 1) * \
48 SKB_TRUESIZE(TIPC_MAX_USER_MSG_SIZE))
51 * struct tipc_port - TIPC port structure
52 * @lock: pointer to spinlock for controlling access to port
53 * @connected: non-zero if port is currently connected to a peer port
54 * @conn_type: TIPC type used when connection was established
55 * @conn_instance: TIPC instance used when connection was established
56 * @published: non-zero if port has one or more associated names
57 * @max_pkt: maximum packet size "hint" used when building messages sent by port
58 * @ref: unique reference to port in TIPC object registry
59 * @phdr: preformatted message header used when sending messages
60 * @port_list: adjacent ports in TIPC's global list of ports
61 * @publications: list of publications for port
62 * @pub_count: total # of publications port has made during its lifetime
66 * @subscription: "node down" subscription used to terminate failed connections
77 struct list_head port_list;
78 struct list_head publications;
82 struct timer_list timer;
83 struct tipc_node_subscr subscription;
86 extern spinlock_t tipc_port_list_lock;
87 struct tipc_port_list;
90 * TIPC port manipulation routines
92 u32 tipc_port_init(struct tipc_port *p_ptr,
93 const unsigned int importance);
95 void tipc_acknowledge(u32 port_ref, u32 ack);
97 void tipc_port_destroy(struct tipc_port *p_ptr);
99 int tipc_publish(struct tipc_port *p_ptr, unsigned int scope,
100 struct tipc_name_seq const *name_seq);
102 int tipc_withdraw(struct tipc_port *p_ptr, unsigned int scope,
103 struct tipc_name_seq const *name_seq);
105 int tipc_port_connect(u32 portref, struct tipc_portid const *port);
107 int tipc_port_disconnect(u32 portref);
110 * The following routines require that the port be locked on entry
112 int __tipc_port_disconnect(struct tipc_port *tp_ptr);
113 int __tipc_port_connect(u32 ref, struct tipc_port *p_ptr,
114 struct tipc_portid const *peer);
115 int tipc_port_peer_msg(struct tipc_port *p_ptr, struct tipc_msg *msg);
117 struct sk_buff *tipc_port_get_ports(void);
118 void tipc_port_reinit(void);
121 * tipc_port_lock - lock port instance referred to and return its pointer
123 static inline struct tipc_port *tipc_port_lock(u32 ref)
125 return (struct tipc_port *)tipc_ref_lock(ref);
129 * tipc_port_unlock - unlock a port instance
131 * Can use pointer instead of tipc_ref_unlock() since port is already locked.
133 static inline void tipc_port_unlock(struct tipc_port *p_ptr)
135 spin_unlock_bh(p_ptr->lock);
138 static inline u32 tipc_port_peernode(struct tipc_port *p_ptr)
140 return msg_destnode(&p_ptr->phdr);
143 static inline u32 tipc_port_peerport(struct tipc_port *p_ptr)
145 return msg_destport(&p_ptr->phdr);
148 static inline bool tipc_port_unreliable(struct tipc_port *port)
150 return msg_src_droppable(&port->phdr) != 0;
153 static inline void tipc_port_set_unreliable(struct tipc_port *port,
156 msg_set_src_droppable(&port->phdr, unreliable ? 1 : 0);
159 static inline bool tipc_port_unreturnable(struct tipc_port *port)
161 return msg_dest_droppable(&port->phdr) != 0;
164 static inline void tipc_port_set_unreturnable(struct tipc_port *port,
167 msg_set_dest_droppable(&port->phdr, unreturnable ? 1 : 0);
171 static inline int tipc_port_importance(struct tipc_port *port)
173 return msg_importance(&port->phdr);
176 static inline int tipc_port_set_importance(struct tipc_port *port, int imp)
178 if (imp > TIPC_CRITICAL_IMPORTANCE)
180 msg_set_importance(&port->phdr, (u32)imp);