mirror of https://gitee.com/openkylin/linux.git
126 lines
4.6 KiB
C
126 lines
4.6 KiB
C
/*
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* net/tipc/bcast.h: Include file for TIPC broadcast code
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*
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* Copyright (c) 2003-2006, 2014-2015, Ericsson AB
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* Copyright (c) 2005, 2010-2011, 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 _TIPC_BCAST_H
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#define _TIPC_BCAST_H
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#include "core.h"
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struct tipc_node;
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struct tipc_msg;
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struct tipc_nl_msg;
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struct tipc_nlist;
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struct tipc_nitem;
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extern const char tipc_bclink_name[];
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extern unsigned long sysctl_tipc_bc_retruni;
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#define TIPC_METHOD_EXPIRE msecs_to_jiffies(5000)
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#define BCLINK_MODE_BCAST 0x1
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#define BCLINK_MODE_RCAST 0x2
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#define BCLINK_MODE_SEL 0x4
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struct tipc_nlist {
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struct list_head list;
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u32 self;
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u16 remote;
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bool local;
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};
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void tipc_nlist_init(struct tipc_nlist *nl, u32 self);
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void tipc_nlist_purge(struct tipc_nlist *nl);
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void tipc_nlist_add(struct tipc_nlist *nl, u32 node);
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void tipc_nlist_del(struct tipc_nlist *nl, u32 node);
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/* Cookie to be used between socket and broadcast layer
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* @rcast: replicast (instead of broadcast) was used at previous xmit
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* @mandatory: broadcast/replicast indication was set by user
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* @deferredq: defer queue to make message in order
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* @expires: re-evaluate non-mandatory transmit method if we are past this
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*/
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struct tipc_mc_method {
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bool rcast;
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bool mandatory;
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struct sk_buff_head deferredq;
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unsigned long expires;
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};
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int tipc_bcast_init(struct net *net);
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void tipc_bcast_stop(struct net *net);
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void tipc_bcast_add_peer(struct net *net, struct tipc_link *l,
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struct sk_buff_head *xmitq);
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void tipc_bcast_remove_peer(struct net *net, struct tipc_link *rcv_bcl);
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void tipc_bcast_inc_bearer_dst_cnt(struct net *net, int bearer_id);
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void tipc_bcast_dec_bearer_dst_cnt(struct net *net, int bearer_id);
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int tipc_bcast_get_mtu(struct net *net);
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void tipc_bcast_toggle_rcast(struct net *net, bool supp);
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int tipc_mcast_xmit(struct net *net, struct sk_buff_head *pkts,
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struct tipc_mc_method *method, struct tipc_nlist *dests,
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u16 *cong_link_cnt);
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int tipc_bcast_rcv(struct net *net, struct tipc_link *l, struct sk_buff *skb);
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void tipc_bcast_ack_rcv(struct net *net, struct tipc_link *l,
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struct tipc_msg *hdr);
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int tipc_bcast_sync_rcv(struct net *net, struct tipc_link *l,
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struct tipc_msg *hdr,
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struct sk_buff_head *retrq);
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int tipc_nl_add_bc_link(struct net *net, struct tipc_nl_msg *msg,
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struct tipc_link *bcl);
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int tipc_nl_bc_link_set(struct net *net, struct nlattr *attrs[]);
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int tipc_bclink_reset_stats(struct net *net, struct tipc_link *l);
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u32 tipc_bcast_get_broadcast_mode(struct net *net);
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u32 tipc_bcast_get_broadcast_ratio(struct net *net);
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void tipc_mcast_filter_msg(struct net *net, struct sk_buff_head *defq,
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struct sk_buff_head *inputq);
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static inline void tipc_bcast_lock(struct net *net)
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{
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spin_lock_bh(&tipc_net(net)->bclock);
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}
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static inline void tipc_bcast_unlock(struct net *net)
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{
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spin_unlock_bh(&tipc_net(net)->bclock);
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}
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static inline struct tipc_link *tipc_bc_sndlink(struct net *net)
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{
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return tipc_net(net)->bcl;
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}
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#endif
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