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b97bf3fd PL |
1 | /* |
2 | * net/tipc/bcast.h: Include file for TIPC broadcast code | |
c4307285 | 3 | * |
3c724acd | 4 | * Copyright (c) 2003-2006, 2014-2015, Ericsson AB |
01d83edd | 5 | * Copyright (c) 2005, 2010-2011, Wind River Systems |
b97bf3fd PL |
6 | * All rights reserved. |
7 | * | |
9ea1fd3c | 8 | * Redistribution and use in source and binary forms, with or without |
b97bf3fd PL |
9 | * modification, are permitted provided that the following conditions are met: |
10 | * | |
9ea1fd3c PL |
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. | |
b97bf3fd | 19 | * |
9ea1fd3c PL |
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 | |
b97bf3fd PL |
34 | * POSSIBILITY OF SUCH DAMAGE. |
35 | */ | |
36 | ||
37 | #ifndef _TIPC_BCAST_H | |
38 | #define _TIPC_BCAST_H | |
39 | ||
1da46568 YX |
40 | #include <linux/tipc_config.h> |
41 | #include "link.h" | |
42 | #include "node.h" | |
7be57fc6 | 43 | |
1da46568 YX |
44 | /** |
45 | * struct tipc_bcbearer_pair - a pair of bearers used by broadcast link | |
46 | * @primary: pointer to primary bearer | |
47 | * @secondary: pointer to secondary bearer | |
48 | * | |
49 | * Bearers must have same priority and same set of reachable destinations | |
50 | * to be paired. | |
51 | */ | |
b97bf3fd | 52 | |
1da46568 YX |
53 | struct tipc_bcbearer_pair { |
54 | struct tipc_bearer *primary; | |
55 | struct tipc_bearer *secondary; | |
56 | }; | |
b97bf3fd | 57 | |
3c724acd JPM |
58 | #define BCBEARER MAX_BEARERS |
59 | ||
1da46568 YX |
60 | /** |
61 | * struct tipc_bcbearer - bearer used by broadcast link | |
62 | * @bearer: (non-standard) broadcast bearer structure | |
63 | * @media: (non-standard) broadcast media structure | |
64 | * @bpairs: array of bearer pairs | |
65 | * @bpairs_temp: temporary array of bearer pairs used by tipc_bcbearer_sort() | |
66 | * @remains: temporary node map used by tipc_bcbearer_send() | |
67 | * @remains_new: temporary node map used tipc_bcbearer_send() | |
68 | * | |
69 | * Note: The fields labelled "temporary" are incorporated into the bearer | |
70 | * to avoid consuming potentially limited stack space through the use of | |
71 | * large local variables within multicast routines. Concurrent access is | |
72 | * prevented through use of the spinlock "bclink_lock". | |
73 | */ | |
74 | struct tipc_bcbearer { | |
75 | struct tipc_bearer bearer; | |
76 | struct tipc_media media; | |
77 | struct tipc_bcbearer_pair bpairs[MAX_BEARERS]; | |
78 | struct tipc_bcbearer_pair bpairs_temp[TIPC_MAX_LINK_PRI + 1]; | |
79 | struct tipc_node_map remains; | |
80 | struct tipc_node_map remains_new; | |
81 | }; | |
82 | ||
83 | /** | |
84 | * struct tipc_bclink - link used for broadcast messages | |
85 | * @lock: spinlock governing access to structure | |
86 | * @link: (non-standard) broadcast link structure | |
87 | * @node: (non-standard) node structure representing b'cast link's peer node | |
1da46568 YX |
88 | * @bcast_nodes: map of broadcast-capable nodes |
89 | * @retransmit_to: node that most recently requested a retransmit | |
90 | * | |
91 | * Handles sequence numbering, fragmentation, bundling, etc. | |
92 | */ | |
93 | struct tipc_bclink { | |
94 | spinlock_t lock; | |
95 | struct tipc_link link; | |
96 | struct tipc_node node; | |
cb1b7280 JPM |
97 | struct sk_buff_head arrvq; |
98 | struct sk_buff_head inputq; | |
1da46568 YX |
99 | struct tipc_node_map bcast_nodes; |
100 | struct tipc_node *retransmit_to; | |
101 | }; | |
102 | ||
103 | struct tipc_node; | |
4b704d59 | 104 | extern const char tipc_bclink_name[]; |
b97bf3fd | 105 | |
b97bf3fd | 106 | /** |
c68ca7b7 | 107 | * tipc_nmap_equal - test for equality of node maps |
b97bf3fd | 108 | */ |
ae8509c4 PG |
109 | static inline int tipc_nmap_equal(struct tipc_node_map *nm_a, |
110 | struct tipc_node_map *nm_b) | |
b97bf3fd PL |
111 | { |
112 | return !memcmp(nm_a, nm_b, sizeof(*nm_a)); | |
113 | } | |
114 | ||
7f9f95d9 YX |
115 | int tipc_bclink_init(struct net *net); |
116 | void tipc_bclink_stop(struct net *net); | |
1da46568 YX |
117 | void tipc_bclink_add_node(struct net *net, u32 addr); |
118 | void tipc_bclink_remove_node(struct net *net, u32 addr); | |
119 | struct tipc_node *tipc_bclink_retransmit_to(struct net *tn); | |
6c00055a | 120 | void tipc_bclink_acknowledge(struct tipc_node *n_ptr, u32 acked); |
c93d3baa | 121 | void tipc_bclink_rcv(struct net *net, struct sk_buff *buf); |
1da46568 | 122 | u32 tipc_bclink_get_last_sent(struct net *net); |
6c00055a | 123 | u32 tipc_bclink_acks_missing(struct tipc_node *n_ptr); |
c5898636 | 124 | void tipc_bclink_update_link_state(struct tipc_node *node, |
c93d3baa | 125 | u32 last_sent); |
1da46568 YX |
126 | int tipc_bclink_reset_stats(struct net *net); |
127 | int tipc_bclink_set_queue_limits(struct net *net, u32 limit); | |
7f9f95d9 YX |
128 | void tipc_bcbearer_sort(struct net *net, struct tipc_node_map *nm_ptr, |
129 | u32 node, bool action); | |
078bec82 | 130 | uint tipc_bclink_get_mtu(void); |
f2f9800d YX |
131 | int tipc_bclink_xmit(struct net *net, struct sk_buff_head *list); |
132 | void tipc_bclink_wakeup_users(struct net *net); | |
1da46568 | 133 | int tipc_nl_add_bc_link(struct net *net, struct tipc_nl_msg *msg); |
670f4f88 | 134 | int tipc_nl_bc_link_set(struct net *net, struct nlattr *attrs[]); |
cb1b7280 | 135 | void tipc_bclink_input(struct net *net); |
7be57fc6 | 136 | |
b97bf3fd | 137 | #endif |