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

 /*
  * net/tipc/port.h: Include file for TIPC port code
  *
  * Copyright (c) 1994-2007, 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_FLOW_CONTROL_WIN 512
 #define CONN_OVERLOAD_LIMIT	((TIPC_FLOW_CONTROL_WIN * 2 + 1) * \
 				SKB_TRUESIZE(TIPC_MAX_USER_MSG_SIZE))

 /**
  * struct tipc_port - TIPC port structure
  * @sk: pointer to socket handle
  * @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
  * @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 {
 	struct sock *sk;
 	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 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
  */
 struct tipc_port *tipc_createport(struct sock *sk,
 				  u32 (*dispatcher)(struct tipc_port *,
 				  struct sk_buff *),
 				  void (*wakeup)(struct tipc_port *),
 				  const u32 importance);

 int tipc_reject_msg(struct sk_buff *buf, u32 err);

 void tipc_acknowledge(u32 port_ref, u32 ack);

 int tipc_deleteport(struct tipc_port *p_ptr);

 int tipc_portimportance(u32 portref, unsigned int *importance);
 int tipc_set_portimportance(u32 portref, unsigned int importance);

 int tipc_portunreliable(u32 portref, unsigned int *isunreliable);
 int tipc_set_portunreliable(u32 portref, unsigned int isunreliable);

 int tipc_portunreturnable(u32 portref, unsigned int *isunreturnable);
 int tipc_set_portunreturnable(u32 portref, unsigned int isunreturnable);

 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);


 /*
  * 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(u32 portref, struct iovec const *msg_sect, unsigned int len);

 int tipc_send2name(u32 portref, struct tipc_name const *name, u32 domain,
 		   struct iovec const *msg_sect, unsigned int len);

 int tipc_send2port(u32 portref, struct tipc_portid const *dest,
 		   struct iovec const *msg_sect, unsigned int len);

 int tipc_port_mcast_xmit(u32 portref, 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 struct tipc_port *tipc_port_deref(u32 ref)
 {
 	return (struct tipc_port *)tipc_ref_deref(ref);
 }

 static inline int tipc_port_congested(struct tipc_port *p_ptr)
 {
 	return (p_ptr->sent - p_ptr->acked) >= (TIPC_FLOW_CONTROL_WIN * 2);
 }

 #endif
	/*
	* net/tipc/port.h: Include file for TIPC port code
	*
	* Copyright (c) 1994-2007, 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_FLOW_CONTROL_WIN 512
	#define CONN_OVERLOAD_LIMIT ((TIPC_FLOW_CONTROL_WIN * 2 + 1) * \
	SKB_TRUESIZE(TIPC_MAX_USER_MSG_SIZE))

	/**
	* struct tipc_port - TIPC port structure
	* @sk: pointer to socket handle
	* @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
	* @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 {
	struct sock *sk;
	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 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
	*/
	struct tipc_port tipc_createport(struct sock sk,
	u32 (dispatcher)(struct tipc_port ,
	struct sk_buff *),
	void (wakeup)(struct tipc_port ),
	const u32 importance);

	int tipc_reject_msg(struct sk_buff *buf, u32 err);

	void tipc_acknowledge(u32 port_ref, u32 ack);

	int tipc_deleteport(struct tipc_port *p_ptr);

	int tipc_portimportance(u32 portref, unsigned int *importance);
	int tipc_set_portimportance(u32 portref, unsigned int importance);

	int tipc_portunreliable(u32 portref, unsigned int *isunreliable);
	int tipc_set_portunreliable(u32 portref, unsigned int isunreliable);

	int tipc_portunreturnable(u32 portref, unsigned int *isunreturnable);
	int tipc_set_portunreturnable(u32 portref, unsigned int isunreturnable);

	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);


	/*
	* 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(u32 portref, struct iovec const *msg_sect, unsigned int len);

	int tipc_send2name(u32 portref, struct tipc_name const *name, u32 domain,
	struct iovec const *msg_sect, unsigned int len);

	int tipc_send2port(u32 portref, struct tipc_portid const *dest,
	struct iovec const *msg_sect, unsigned int len);

	int tipc_port_mcast_xmit(u32 portref, 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 struct tipc_port *tipc_port_deref(u32 ref)
	{
	return (struct tipc_port *)tipc_ref_deref(ref);
	}

	static inline int tipc_port_congested(struct tipc_port *p_ptr)
	{
	return (p_ptr->sent - p_ptr->acked) >= (TIPC_FLOW_CONTROL_WIN * 2);
	}

	#endif