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 extern 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 56 struct tipc_nlist { 57 struct list_head list; 58 u32 self; 59 u16 remote; 60 bool local; 61 }; 62 63 void tipc_nlist_init(struct tipc_nlist *nl, u32 self); 64 void tipc_nlist_purge(struct tipc_nlist *nl); 65 void tipc_nlist_add(struct tipc_nlist *nl, u32 node); 66 void 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 */ 74 struct tipc_mc_method { 75 bool rcast; 76 bool mandatory; 77 struct sk_buff_head deferredq; 78 unsigned long expires; 79 }; 80 81 int tipc_bcast_init(struct net *net); 82 void tipc_bcast_stop(struct net *net); 83 void tipc_bcast_add_peer(struct net *net, struct tipc_link *l, 84 struct sk_buff_head *xmitq); 85 void tipc_bcast_remove_peer(struct net *net, struct tipc_link *rcv_bcl); 86 void tipc_bcast_inc_bearer_dst_cnt(struct net *net, int bearer_id); 87 void tipc_bcast_dec_bearer_dst_cnt(struct net *net, int bearer_id); 88 int tipc_bcast_get_mtu(struct net *net); 89 void tipc_bcast_toggle_rcast(struct net *net, bool supp); 90 int 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); 93 int tipc_bcast_rcv(struct net *net, struct tipc_link *l, struct sk_buff *skb); 94 void tipc_bcast_ack_rcv(struct net *net, struct tipc_link *l, 95 struct tipc_msg *hdr); 96 int tipc_bcast_sync_rcv(struct net *net, struct tipc_link *l, 97 struct tipc_msg *hdr, 98 struct sk_buff_head *retrq); 99 int tipc_nl_add_bc_link(struct net *net, struct tipc_nl_msg *msg, 100 struct tipc_link *bcl); 101 int tipc_nl_bc_link_set(struct net *net, struct nlattr *attrs[]); 102 int tipc_bclink_reset_stats(struct net *net, struct tipc_link *l); 103 104 u32 tipc_bcast_get_broadcast_mode(struct net *net); 105 u32 tipc_bcast_get_broadcast_ratio(struct net *net); 106 107 void tipc_mcast_filter_msg(struct net *net, struct sk_buff_head *defq, 108 struct sk_buff_head *inputq); 109 110 static inline void tipc_bcast_lock(struct net *net) 111 { 112 spin_lock_bh(&tipc_net(net)->bclock); 113 } 114 115 static inline void tipc_bcast_unlock(struct net *net) 116 { 117 spin_unlock_bh(&tipc_net(net)->bclock); 118 } 119 120 static inline struct tipc_link *tipc_bc_sndlink(struct net *net) 121 { 122 return tipc_net(net)->bcl; 123 } 124 125 #endif 126