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_xmit(struct net *net, struct sk_buff_head *pkts,
94 u16 *cong_link_cnt);
95 int tipc_bcast_rcv(struct net *net, struct tipc_link *l, struct sk_buff *skb);
96 void tipc_bcast_ack_rcv(struct net *net, struct tipc_link *l,
97 struct tipc_msg *hdr);
98 int tipc_bcast_sync_rcv(struct net *net, struct tipc_link *l,
99 struct tipc_msg *hdr,
100 struct sk_buff_head *retrq);
101 int tipc_nl_add_bc_link(struct net *net, struct tipc_nl_msg *msg,
102 struct tipc_link *bcl);
103 int tipc_nl_bc_link_set(struct net *net, struct nlattr *attrs[]);
104 int tipc_bclink_reset_stats(struct net *net, struct tipc_link *l);
105
106 u32 tipc_bcast_get_mode(struct net *net);
107 u32 tipc_bcast_get_broadcast_ratio(struct net *net);
108
109 void tipc_mcast_filter_msg(struct net *net, struct sk_buff_head *defq,
110 struct sk_buff_head *inputq);
111
tipc_bcast_lock(struct net * net)112 static inline void tipc_bcast_lock(struct net *net)
113 {
114 spin_lock_bh(&tipc_net(net)->bclock);
115 }
116
tipc_bcast_unlock(struct net * net)117 static inline void tipc_bcast_unlock(struct net *net)
118 {
119 spin_unlock_bh(&tipc_net(net)->bclock);
120 }
121
tipc_bc_sndlink(struct net * net)122 static inline struct tipc_link *tipc_bc_sndlink(struct net *net)
123 {
124 return tipc_net(net)->bcl;
125 }
126
127 #endif
128