bcast.h (4742B)
1/* 2 * net/tipc/bcast.h: Include file for TIPC broadcast code 3 * 4 * Copyright (c) 2003-2006, 2014-2015, Ericsson AB 5 * Copyright (c) 2005, 2010-2011, 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 _TIPC_BCAST_H 38#define _TIPC_BCAST_H 39 40#include "core.h" 41 42struct tipc_node; 43struct tipc_msg; 44struct tipc_nl_msg; 45struct tipc_nlist; 46struct tipc_nitem; 47extern const char tipc_bclink_name[]; 48extern unsigned long sysctl_tipc_bc_retruni; 49 50#define TIPC_METHOD_EXPIRE msecs_to_jiffies(5000) 51 52#define BCLINK_MODE_BCAST 0x1 53#define BCLINK_MODE_RCAST 0x2 54#define BCLINK_MODE_SEL 0x4 55 56struct tipc_nlist { 57 struct list_head list; 58 u32 self; 59 u16 remote; 60 bool local; 61}; 62 63void tipc_nlist_init(struct tipc_nlist *nl, u32 self); 64void tipc_nlist_purge(struct tipc_nlist *nl); 65void tipc_nlist_add(struct tipc_nlist *nl, u32 node); 66void tipc_nlist_del(struct tipc_nlist *nl, u32 node); 67 68/* Cookie to be used between socket and broadcast layer 69 * @rcast: replicast (instead of broadcast) was used at previous xmit 70 * @mandatory: broadcast/replicast indication was set by user 71 * @deferredq: defer queue to make message in order 72 * @expires: re-evaluate non-mandatory transmit method if we are past this 73 */ 74struct tipc_mc_method { 75 bool rcast; 76 bool mandatory; 77 struct sk_buff_head deferredq; 78 unsigned long expires; 79}; 80 81int tipc_bcast_init(struct net *net); 82void tipc_bcast_stop(struct net *net); 83void tipc_bcast_add_peer(struct net *net, struct tipc_link *l, 84 struct sk_buff_head *xmitq); 85void tipc_bcast_remove_peer(struct net *net, struct tipc_link *rcv_bcl); 86void tipc_bcast_inc_bearer_dst_cnt(struct net *net, int bearer_id); 87void tipc_bcast_dec_bearer_dst_cnt(struct net *net, int bearer_id); 88int tipc_bcast_get_mtu(struct net *net); 89void tipc_bcast_toggle_rcast(struct net *net, bool supp); 90int tipc_mcast_xmit(struct net *net, struct sk_buff_head *pkts, 91 struct tipc_mc_method *method, struct tipc_nlist *dests, 92 u16 *cong_link_cnt); 93int tipc_bcast_xmit(struct net *net, struct sk_buff_head *pkts, 94 u16 *cong_link_cnt); 95int tipc_bcast_rcv(struct net *net, struct tipc_link *l, struct sk_buff *skb); 96void tipc_bcast_ack_rcv(struct net *net, struct tipc_link *l, 97 struct tipc_msg *hdr); 98int tipc_bcast_sync_rcv(struct net *net, struct tipc_link *l, 99 struct tipc_msg *hdr, 100 struct sk_buff_head *retrq); 101int tipc_nl_add_bc_link(struct net *net, struct tipc_nl_msg *msg, 102 struct tipc_link *bcl); 103int tipc_nl_bc_link_set(struct net *net, struct nlattr *attrs[]); 104int tipc_bclink_reset_stats(struct net *net, struct tipc_link *l); 105 106u32 tipc_bcast_get_mode(struct net *net); 107u32 tipc_bcast_get_broadcast_ratio(struct net *net); 108 109void tipc_mcast_filter_msg(struct net *net, struct sk_buff_head *defq, 110 struct sk_buff_head *inputq); 111 112static inline void tipc_bcast_lock(struct net *net) 113{ 114 spin_lock_bh(&tipc_net(net)->bclock); 115} 116 117static inline void tipc_bcast_unlock(struct net *net) 118{ 119 spin_unlock_bh(&tipc_net(net)->bclock); 120} 121 122static inline struct tipc_link *tipc_bc_sndlink(struct net *net) 123{ 124 return tipc_net(net)->bcl; 125} 126 127#endif