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 | |
112 | static inline void tipc_bcast_lock(struct net *net) |
113 | { |
114 | spin_lock_bh(lock: &tipc_net(net)->bclock); |
115 | } |
116 | |
117 | static inline void tipc_bcast_unlock(struct net *net) |
118 | { |
119 | spin_unlock_bh(lock: &tipc_net(net)->bclock); |
120 | } |
121 | |
122 | static inline struct tipc_link *tipc_bc_sndlink(struct net *net) |
123 | { |
124 | return tipc_net(net)->bcl; |
125 | } |
126 | |
127 | #endif |
128 | |