0c3141e910
This patch modifies TIPC's socket code to follow the same approach used by other protocols. This change eliminates the need for a mutex in the TIPC-specific portion of the socket protocol data structure -- in its place, the standard Linux socket backlog queue and associated locking routines are utilized. These changes fix a long-standing receive queue bug on SMP systems, and also enable individual read and write threads to utilize a socket without unnecessarily interfering with each other. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
110 lines
3.8 KiB
C
110 lines
3.8 KiB
C
/*
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* include/net/tipc/tipc_port.h: Include file for privileged access to TIPC ports
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*
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* Copyright (c) 1994-2007, Ericsson AB
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* Copyright (c) 2005-2007, Wind River Systems
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the names of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _NET_TIPC_PORT_H_
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#define _NET_TIPC_PORT_H_
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#ifdef __KERNEL__
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#include <linux/tipc.h>
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#include <linux/skbuff.h>
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#include <net/tipc/tipc_msg.h>
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#define TIPC_FLOW_CONTROL_WIN 512
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/**
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* struct tipc_port - native TIPC port info available to privileged users
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* @usr_handle: pointer to additional user-defined information about port
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* @lock: pointer to spinlock for controlling access to port
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* @connected: non-zero if port is currently connected to a peer port
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* @conn_type: TIPC type used when connection was established
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* @conn_instance: TIPC instance used when connection was established
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* @conn_unacked: number of unacknowledged messages received from peer port
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* @published: non-zero if port has one or more associated names
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* @congested: non-zero if cannot send because of link or port congestion
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* @max_pkt: maximum packet size "hint" used when building messages sent by port
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* @ref: unique reference to port in TIPC object registry
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* @phdr: preformatted message header used when sending messages
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*/
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struct tipc_port {
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void *usr_handle;
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spinlock_t *lock;
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int connected;
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u32 conn_type;
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u32 conn_instance;
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u32 conn_unacked;
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int published;
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u32 congested;
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u32 max_pkt;
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u32 ref;
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struct tipc_msg phdr;
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};
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/**
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* tipc_createport_raw - create a native TIPC port and return it's reference
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*
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* Note: 'dispatcher' and 'wakeup' deliver a locked port.
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*/
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u32 tipc_createport_raw(void *usr_handle,
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u32 (*dispatcher)(struct tipc_port *, struct sk_buff *),
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void (*wakeup)(struct tipc_port *),
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const u32 importance);
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int tipc_reject_msg(struct sk_buff *buf, u32 err);
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int tipc_send_buf_fast(struct sk_buff *buf, u32 destnode);
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void tipc_acknowledge(u32 port_ref,u32 ack);
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struct tipc_port *tipc_get_port(const u32 ref);
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void *tipc_get_handle(const u32 ref);
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/*
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* The following routines require that the port be locked on entry
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*/
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int tipc_disconnect_port(struct tipc_port *tp_ptr);
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#endif
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#endif
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