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 * @conn_unacked: number of unacknowledged messages received from peer port
57 * @published: non-zero if port has one or more associated names
58 * @congested: non-zero if cannot send because of link or port congestion
59 * @max_pkt: maximum packet size "hint" used when building messages sent by port
60 * @ref: unique reference to port in TIPC object registry
61 * @phdr: preformatted message header used when sending messages
62 * @port_list: adjacent ports in TIPC's global list of ports
63 * @wait_list: adjacent ports in list of ports waiting on link congestion
65 * @sent: # of non-empty messages sent by port
66 * @acked: # of non-empty message acknowledgements from connected port's peer
67 * @publications: list of publications for port
68 * @pub_count: total # of publications port has made during its lifetime
72 * @subscription: "node down" subscription used to terminate failed connections
85 struct list_head port_list
;
86 struct list_head wait_list
;
90 struct list_head publications
;
94 struct timer_list timer
;
95 struct tipc_node_subscr subscription
;
98 extern spinlock_t tipc_port_list_lock
;
99 struct tipc_port_list
;
102 * TIPC port manipulation routines
104 u32
tipc_port_init(struct tipc_port
*p_ptr
,
105 const unsigned int importance
);
107 void tipc_acknowledge(u32 port_ref
, u32 ack
);
109 void tipc_port_destroy(struct tipc_port
*p_ptr
);
111 int tipc_publish(struct tipc_port
*p_ptr
, unsigned int scope
,
112 struct tipc_name_seq
const *name_seq
);
114 int tipc_withdraw(struct tipc_port
*p_ptr
, unsigned int scope
,
115 struct tipc_name_seq
const *name_seq
);
117 int tipc_port_connect(u32 portref
, struct tipc_portid
const *port
);
119 int tipc_port_disconnect(u32 portref
);
121 int tipc_port_shutdown(u32 ref
);
123 void tipc_port_wakeup(struct tipc_port
*port
);
126 * The following routines require that the port be locked on entry
128 int __tipc_port_disconnect(struct tipc_port
*tp_ptr
);
129 int __tipc_port_connect(u32 ref
, struct tipc_port
*p_ptr
,
130 struct tipc_portid
const *peer
);
131 int tipc_port_peer_msg(struct tipc_port
*p_ptr
, struct tipc_msg
*msg
);
134 * TIPC messaging routines
137 int tipc_port_mcast_xmit(struct tipc_port
*port
,
138 struct tipc_name_seq
const *seq
,
139 struct iovec
const *msg
,
142 struct sk_buff
*tipc_port_get_ports(void);
143 void tipc_port_mcast_rcv(struct sk_buff
*buf
, struct tipc_port_list
*dp
);
144 void tipc_port_reinit(void);
147 * tipc_port_lock - lock port instance referred to and return its pointer
149 static inline struct tipc_port
*tipc_port_lock(u32 ref
)
151 return (struct tipc_port
*)tipc_ref_lock(ref
);
155 * tipc_port_unlock - unlock a port instance
157 * Can use pointer instead of tipc_ref_unlock() since port is already locked.
159 static inline void tipc_port_unlock(struct tipc_port
*p_ptr
)
161 spin_unlock_bh(p_ptr
->lock
);
164 static inline int tipc_port_congested(struct tipc_port
*p_ptr
)
166 return ((p_ptr
->sent
- p_ptr
->acked
) >= TIPC_FLOWCTRL_WIN
);
170 static inline u32
tipc_port_peernode(struct tipc_port
*p_ptr
)
172 return msg_destnode(&p_ptr
->phdr
);
175 static inline u32
tipc_port_peerport(struct tipc_port
*p_ptr
)
177 return msg_destport(&p_ptr
->phdr
);
180 static inline bool tipc_port_unreliable(struct tipc_port
*port
)
182 return msg_src_droppable(&port
->phdr
) != 0;
185 static inline void tipc_port_set_unreliable(struct tipc_port
*port
,
188 msg_set_src_droppable(&port
->phdr
, unreliable
? 1 : 0);
191 static inline bool tipc_port_unreturnable(struct tipc_port
*port
)
193 return msg_dest_droppable(&port
->phdr
) != 0;
196 static inline void tipc_port_set_unreturnable(struct tipc_port
*port
,
199 msg_set_dest_droppable(&port
->phdr
, unreturnable
? 1 : 0);
203 static inline int tipc_port_importance(struct tipc_port
*port
)
205 return msg_importance(&port
->phdr
);
208 static inline void tipc_port_set_importance(struct tipc_port
*port
, int imp
)
210 msg_set_importance(&port
->phdr
, (u32
)imp
);