net/tipc/port.h - linux - Git at Google

 /*
  * net/tipc/port.h: Include file for TIPC port code
  *
  * 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
  * modification, are permitted provided that the following conditions are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  * 3. Neither the names of the copyright holders nor the names of its
  *    contributors may be used to endorse or promote products derived from
  *    this software without specific prior written permission.
  *
  * Alternatively, this software may be distributed under the terms of the
  * GNU General Public License ("GPL") version 2 as published by the Free
  * Software Foundation.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  */

 #ifndef _TIPC_PORT_H
 #define _TIPC_PORT_H

 #include "ref.h"
 #include "net.h"
 #include "msg.h"
 #include "node_subscr.h"

 #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 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
  * @wait_list: adjacent ports in list of ports waiting on link congestion
  * @waiting_pkts:
  * @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:
  * @timer_ref:
  * @subscription: "node down" subscription used to terminate failed connections
  */
 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;
 	struct list_head wait_list;
 	u32 waiting_pkts;
 	u32 sent;
 	u32 acked;
 	struct list_head publications;
 	u32 pub_count;
 	u32 probing_state;
 	u32 probing_interval;
 	struct timer_list timer;
 	struct tipc_node_subscr subscription;
 };

 extern spinlock_t tipc_port_list_lock;
 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_port_rcv(struct sk_buff *buf);

 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);

 struct sk_buff *tipc_port_get_ports(void);
 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 tipc_port *tipc_port_lock(u32 ref)
 {
 	return (struct tipc_port *)tipc_ref_lock(ref);
 }

 /**
  * tipc_port_unlock - unlock a port instance
  *
  * 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 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);
 }

 static inline  bool tipc_port_unreliable(struct tipc_port *port)
 {
 	return msg_src_droppable(&port->phdr) != 0;
 }

 static inline void tipc_port_set_unreliable(struct tipc_port *port,
 					    bool unreliable)
 {
 	msg_set_src_droppable(&port->phdr, unreliable ? 1 : 0);
 }

 static inline bool tipc_port_unreturnable(struct tipc_port *port)
 {
 	return msg_dest_droppable(&port->phdr) != 0;
 }

 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 void tipc_port_set_importance(struct tipc_port *port, int imp)
 {
 	msg_set_importance(&port->phdr, (u32)imp);
 }

 #endif
	/*
	* net/tipc/port.h: Include file for TIPC port code
	*
	* 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
	* modification, are permitted provided that the following conditions are met:
	*
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	* 3. Neither the names of the copyright holders nor the names of its
	* contributors may be used to endorse or promote products derived from
	* this software without specific prior written permission.
	*
	* Alternatively, this software may be distributed under the terms of the
	* GNU General Public License ("GPL") version 2 as published by the Free
	* Software Foundation.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
	* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	* POSSIBILITY OF SUCH DAMAGE.
	*/

	#ifndef _TIPC_PORT_H
	#define _TIPC_PORT_H

	#include "ref.h"
	#include "net.h"
	#include "msg.h"
	#include "node_subscr.h"

	#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 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
	* @wait_list: adjacent ports in list of ports waiting on link congestion
	* @waiting_pkts:
	* @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:
	* @timer_ref:
	* @subscription: "node down" subscription used to terminate failed connections
	*/
	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;
	struct list_head wait_list;
	u32 waiting_pkts;
	u32 sent;
	u32 acked;
	struct list_head publications;
	u32 pub_count;
	u32 probing_state;
	u32 probing_interval;
	struct timer_list timer;
	struct tipc_node_subscr subscription;
	};

	extern spinlock_t tipc_port_list_lock;
	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_port_rcv(struct sk_buff *buf);

	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);

	struct sk_buff *tipc_port_get_ports(void);
	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 tipc_port *tipc_port_lock(u32 ref)
	{
	return (struct tipc_port *)tipc_ref_lock(ref);
	}

	/**
	* tipc_port_unlock - unlock a port instance
	*
	* 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 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);
	}

	static inline bool tipc_port_unreliable(struct tipc_port *port)
	{
	return msg_src_droppable(&port->phdr) != 0;
	}

	static inline void tipc_port_set_unreliable(struct tipc_port *port,
	bool unreliable)
	{
	msg_set_src_droppable(&port->phdr, unreliable ? 1 : 0);
	}

	static inline bool tipc_port_unreturnable(struct tipc_port *port)
	{
	return msg_dest_droppable(&port->phdr) != 0;
	}

	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 void tipc_port_set_importance(struct tipc_port *port, int imp)
	{
	msg_set_importance(&port->phdr, (u32)imp);
	}

	#endif