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_FLOW_CONTROL_WIN 512
46 #define CONN_OVERLOAD_LIMIT ((TIPC_FLOW_CONTROL_WIN * 2 + 1) * \
47 SKB_TRUESIZE(TIPC_MAX_USER_MSG_SIZE))
50 * struct tipc_port - TIPC port structure
51 * @lock: pointer to spinlock for controlling access to port
52 * @connected: non-zero if port is currently connected to a peer port
53 * @conn_type: TIPC type used when connection was established
54 * @conn_instance: TIPC instance used when connection was established
55 * @conn_unacked: number of unacknowledged messages received from peer port
56 * @published: non-zero if port has one or more associated names
57 * @congested: non-zero if cannot send because of link or port congestion
58 * @max_pkt: maximum packet size "hint" used when building messages sent by port
59 * @ref: unique reference to port in TIPC object registry
60 * @phdr: preformatted message header used when sending messages
61 * @port_list: adjacent ports in TIPC's global list of ports
62 * @wait_list: adjacent ports in list of ports waiting on link congestion
64 * @sent: # of non-empty messages sent by port
65 * @acked: # of non-empty message acknowledgements from connected port's peer
66 * @publications: list of publications for port
67 * @pub_count: total # of publications port has made during its lifetime
71 * @subscription: "node down" subscription used to terminate failed connections
84 struct list_head port_list;
85 struct list_head wait_list;
89 struct list_head publications;
93 struct timer_list timer;
94 struct tipc_node_subscr subscription;
97 extern spinlock_t tipc_port_list_lock;
98 struct tipc_port_list;
101 * TIPC port manipulation routines
103 u32 tipc_port_init(struct tipc_port *p_ptr,
104 const unsigned int importance);
106 int tipc_reject_msg(struct sk_buff *buf, u32 err);
108 void tipc_acknowledge(u32 port_ref, u32 ack);
110 void tipc_port_destroy(struct tipc_port *p_ptr);
112 int tipc_publish(struct tipc_port *p_ptr, unsigned int scope,
113 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
136 int tipc_port_rcv(struct sk_buff *buf);
137 int tipc_send(u32 portref, struct iovec const *msg_sect, unsigned int len);
139 int tipc_send2name(u32 portref, struct tipc_name const *name, u32 domain,
140 struct iovec const *msg_sect, unsigned int len);
142 int tipc_send2port(u32 portref, struct tipc_portid const *dest,
143 struct iovec const *msg_sect, unsigned int len);
145 int tipc_port_mcast_xmit(u32 portref, struct tipc_name_seq const *seq,
146 struct iovec const *msg, unsigned int len);
148 int tipc_port_iovec_reject(struct tipc_port *p_ptr, struct tipc_msg *hdr,
149 struct iovec const *msg_sect, unsigned int len,
151 struct sk_buff *tipc_port_get_ports(void);
152 void tipc_port_proto_rcv(struct sk_buff *buf);
153 void tipc_port_mcast_rcv(struct sk_buff *buf, struct tipc_port_list *dp);
154 void tipc_port_reinit(void);
157 * tipc_port_lock - lock port instance referred to and return its pointer
159 static inline struct tipc_port *tipc_port_lock(u32 ref)
161 return (struct tipc_port *)tipc_ref_lock(ref);
165 * tipc_port_unlock - unlock a port instance
167 * Can use pointer instead of tipc_ref_unlock() since port is already locked.
169 static inline void tipc_port_unlock(struct tipc_port *p_ptr)
171 spin_unlock_bh(p_ptr->lock);
174 static inline struct tipc_port *tipc_port_deref(u32 ref)
176 return (struct tipc_port *)tipc_ref_deref(ref);
179 static inline int tipc_port_congested(struct tipc_port *p_ptr)
181 return (p_ptr->sent - p_ptr->acked) >= (TIPC_FLOW_CONTROL_WIN * 2);
185 static inline u32 tipc_port_peernode(struct tipc_port *p_ptr)
187 return msg_destnode(&p_ptr->phdr);
190 static inline u32 tipc_port_peerport(struct tipc_port *p_ptr)
192 return msg_destport(&p_ptr->phdr);
195 static inline bool tipc_port_unreliable(struct tipc_port *port)
197 return msg_src_droppable(&port->phdr) != 0;
200 static inline void tipc_port_set_unreliable(struct tipc_port *port,
203 msg_set_src_droppable(&port->phdr, unreliable ? 1 : 0);
206 static inline bool tipc_port_unreturnable(struct tipc_port *port)
208 return msg_dest_droppable(&port->phdr) != 0;
211 static inline void tipc_port_set_unreturnable(struct tipc_port *port,
214 msg_set_dest_droppable(&port->phdr, unreturnable ? 1 : 0);
218 static inline int tipc_port_importance(struct tipc_port *port)
220 return msg_importance(&port->phdr);
223 static inline void tipc_port_set_importance(struct tipc_port *port, int imp)
225 msg_set_importance(&port->phdr, (u32)imp);