| 1 | |
| 2 | * net/tipc/bcast.h: Include file for TIPC broadcast code
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| 3 | *
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| 4 | * Copyright (c) 2003-2006, 2014-2015, Ericsson AB
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| 5 | * Copyright (c) 2005, 2010-2011, Wind River Systems
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| 6 | * All rights reserved.
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| 7 | *
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| 8 | * Redistribution and use in source and binary forms, with or without
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| 9 | * modification, are permitted provided that the following conditions are met:
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| 10 | *
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| 11 | * 1. Redistributions of source code must retain the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer.
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| 13 | * 2. Redistributions in binary form must reproduce the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer in the
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| 15 | * documentation and/or other materials provided with the distribution.
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| 16 | * 3. Neither the names of the copyright holders nor the names of its
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| 17 | * contributors may be used to endorse or promote products derived from
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| 18 | * this software without specific prior written permission.
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| 19 | *
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| 20 | * Alternatively, this software may be distributed under the terms of the
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| 21 | * GNU General Public License ("GPL") version 2 as published by the Free
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| 22 | * Software Foundation.
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| 23 | *
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| 24 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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| 25 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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| 28 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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| 29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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| 30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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| 31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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| 32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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| 33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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| 34 | * POSSIBILITY OF SUCH DAMAGE.
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| 35 |
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| 36 |
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| 37 | #ifndef _TIPC_BCAST_H
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| 38 | #define _TIPC_BCAST_H
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| 39 |
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| 40 | #include "core.h"
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| 41 |
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| 42 | struct tipc_node;
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| 43 | struct tipc_msg;
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| 44 | struct tipc_nl_msg;
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| 45 | struct tipc_nlist;
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| 46 | struct tipc_nitem;
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| 47 | extern const char tipc_bclink_name[];
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| 48 | extern unsigned long sysctl_tipc_bc_retruni;
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| 49 |
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| 50 | #define TIPC_METHOD_EXPIRE msecs_to_jiffies(5000)
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| 51 |
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| 52 | #define BCLINK_MODE_BCAST 0x1
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| 53 | #define BCLINK_MODE_RCAST 0x2
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| 54 | #define BCLINK_MODE_SEL 0x4
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| 55 |
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| 56 | struct tipc_nlist {
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| 57 | struct list_head list;
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| 58 | u32 self;
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| 59 | u16 remote;
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| 60 | bool local;
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| 61 | };
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| 62 |
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| 63 | void tipc_nlist_init(struct tipc_nlist *nl, u32 self);
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| 64 | void tipc_nlist_purge(struct tipc_nlist *nl);
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| 65 | void tipc_nlist_add(struct tipc_nlist *nl, u32 node);
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| 66 | void tipc_nlist_del(struct tipc_nlist *nl, u32 node);
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| 67 |
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| 68 | |
| 69 | * @rcast: replicast (instead of broadcast) was used at previous xmit
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| 70 | * @mandatory: broadcast/replicast indication was set by user
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| 71 | * @deferredq: defer queue to make message in order
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| 72 | * @expires: re-evaluate non-mandatory transmit method if we are past this
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| 73 |
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| 74 | struct tipc_mc_method {
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| 75 | bool rcast;
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| 76 | bool mandatory;
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| 77 | struct sk_buff_head deferredq;
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| 78 | unsigned long expires;
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| 79 | };
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| 80 |
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| 81 | int tipc_bcast_init(struct net *net);
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| 82 | void tipc_bcast_stop(struct net *net);
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| 83 | void tipc_bcast_add_peer(struct net *net, struct tipc_link *l,
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| 84 | struct sk_buff_head *xmitq);
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| 85 | void tipc_bcast_remove_peer(struct net *net, struct tipc_link *rcv_bcl);
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| 86 | void tipc_bcast_inc_bearer_dst_cnt(struct net *net, int bearer_id);
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| 87 | void tipc_bcast_dec_bearer_dst_cnt(struct net *net, int bearer_id);
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| 88 | int tipc_bcast_get_mtu(struct net *net);
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| 89 | void tipc_bcast_toggle_rcast(struct net *net, bool supp);
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| 90 | int tipc_mcast_xmit(struct net *net, struct sk_buff_head *pkts,
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| 91 | struct tipc_mc_method *method, struct tipc_nlist *dests,
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| 92 | u16 *cong_link_cnt);
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| 93 | int tipc_bcast_xmit(struct net *net, struct sk_buff_head *pkts,
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| 94 | u16 *cong_link_cnt);
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| 95 | int tipc_bcast_rcv(struct net *net, struct tipc_link *l, struct sk_buff *skb);
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| 96 | void tipc_bcast_ack_rcv(struct net *net, struct tipc_link *l,
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| 97 | struct tipc_msg *hdr);
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| 98 | int tipc_bcast_sync_rcv(struct net *net, struct tipc_link *l,
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| 99 | struct tipc_msg *hdr,
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| 100 | struct sk_buff_head *retrq, bool *valid);
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| 101 | int tipc_nl_add_bc_link(struct net *net, struct tipc_nl_msg *msg,
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| 102 | struct tipc_link *bcl);
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| 103 | int tipc_nl_bc_link_set(struct net *net, struct nlattr *attrs[]);
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| 104 | int tipc_bclink_reset_stats(struct net *net, struct tipc_link *l);
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| 105 |
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| 106 | u32 tipc_bcast_get_mode(struct net *net);
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| 107 | u32 tipc_bcast_get_broadcast_ratio(struct net *net);
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| 108 |
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| 109 | void tipc_mcast_filter_msg(struct net *net, struct sk_buff_head *defq,
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| 110 | struct sk_buff_head *inputq);
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| 111 |
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| 112 | static inline void tipc_bcast_lock(struct net *net)
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| 113 | {
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| 114 | spin_lock_bh(&tipc_net(net)->bclock);
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| 115 | }
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| 116 |
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| 117 | static inline void tipc_bcast_unlock(struct net *net)
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| 118 | {
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| 119 | spin_unlock_bh(&tipc_net(net)->bclock);
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| 120 | }
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| 121 |
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| 122 | static inline struct tipc_link *tipc_bc_sndlink(struct net *net)
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| 123 | {
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| 124 | return tipc_net(net)->bcl;
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| 125 | }
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| 126 |
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| 127 | #endif
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