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