include/net/tipc/tipc_port.h

   1 /*
   2  * include/net/tipc/tipc_port.h: Include file for privileged access to TIPC ports
   3  *
   4  * Copyright (c) 1994-2006, Ericsson AB
   5  * Copyright (c) 2005, Wind River Systems
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the names of the copyright holders nor the names of its
  17  *    contributors may be used to endorse or promote products derived from
  18  *    this software without specific prior written permission.
  19  *
  20  * Alternatively, this software may be distributed under the terms of the
  21  * GNU General Public License ("GPL") version 2 as published by the Free
  22  * Software Foundation.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  25  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  28  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  29  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  30  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  31  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  32  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  33  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  34  * POSSIBILITY OF SUCH DAMAGE.
  35  */
  36
  37 #ifndef _NET_TIPC_PORT_H_
  38 #define _NET_TIPC_PORT_H_
  39
  40 #ifdef __KERNEL__
  41
  42 #include <linux/tipc.h>
  43 #include <linux/skbuff.h>
  44 #include <net/tipc/tipc_msg.h>
  45
  46 #define TIPC_FLOW_CONTROL_WIN 512
  47
  48 /**
  49  * struct tipc_port - native TIPC port info available to privileged users
  50  * @usr_handle: pointer to additional user-defined information about port
  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  * @ref: unique reference to port in TIPC object registry
  59  * @phdr: preformatted message header used when sending messages
  60  */
  61
  62 struct tipc_port {
  63         void *usr_handle;
  64         spinlock_t *lock;
  65         int connected;
  66         u32 conn_type;
  67         u32 conn_instance;
  68         u32 conn_unacked;
  69         int published;
  70         u32 congested;
  71         u32 ref;
  72         struct tipc_msg phdr;
  73 };
  74
  75
  76 /**
  77  * tipc_createport_raw - create a native TIPC port and return it's reference
  78  *
  79  * Note: 'dispatcher' and 'wakeup' deliver a locked port.
  80  */
  81
  82 u32 tipc_createport_raw(void *usr_handle,
  83                         u32 (*dispatcher)(struct tipc_port *, struct sk_buff *),
  84                         void (*wakeup)(struct tipc_port *),
  85                         const u32 importance);
  86
  87 /*
  88  * tipc_set_msg_option(): port must be locked.
  89  */
  90 int tipc_set_msg_option(struct tipc_port *tp_ptr,
  91                         const char *opt,
  92                         const u32 len);
  93
  94 int tipc_reject_msg(struct sk_buff *buf, u32 err);
  95
  96 int tipc_send_buf_fast(struct sk_buff *buf, u32 destnode);
  97
  98 void tipc_acknowledge(u32 port_ref,u32 ack);
  99
 100 struct tipc_port *tipc_get_port(const u32 ref);
 101
 102 void *tipc_get_handle(const u32 ref);
 103
 104
 105 #endif
 106
 107 #endif
 108