202 lines
7.0 KiB
C
202 lines
7.0 KiB
C
/*
|
|
* 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(u32 portref);
|
|
|
|
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(u32 portref, unsigned int scope,
|
|
struct tipc_name_seq const *name_seq);
|
|
int tipc_withdraw(u32 portref, unsigned int scope,
|
|
struct tipc_name_seq const *name_seq);
|
|
|
|
int tipc_connect(u32 portref, struct tipc_portid const *port);
|
|
|
|
int tipc_disconnect(u32 portref);
|
|
|
|
int tipc_shutdown(u32 ref);
|
|
|
|
|
|
/*
|
|
* The following routines require that the port be locked on entry
|
|
*/
|
|
int __tipc_disconnect(struct tipc_port *tp_ptr);
|
|
int __tipc_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_recv_msg(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_multicast(u32 portref, struct tipc_name_seq const *seq,
|
|
struct iovec const *msg, unsigned int len);
|
|
|
|
int tipc_port_reject_sections(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_recv_proto_msg(struct sk_buff *buf);
|
|
void tipc_port_recv_mcast(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
|