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2 * net/tipc/link.h: Include file for TIPC link code
4 * Copyright (c) 1995-2006, 2013-2014, Ericsson AB
5 * Copyright (c) 2004-2005, 2010-2011, Wind River Systems
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
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.
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.
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.
40 #include <net/genetlink.h>
44 /* TIPC-specific error codes
46 #define ELINKCONG EAGAIN /* link congestion <=> resource unavailable */
51 LINK_ESTABLISH_EVT
= 0xec1ab1e,
52 LINK_PEER_RESET_EVT
= 0x9eed0e,
53 LINK_FAILURE_EVT
= 0xfa110e,
54 LINK_RESET_EVT
= 0x10ca1d0e,
55 LINK_FAILOVER_BEGIN_EVT
= 0xfa110bee,
56 LINK_FAILOVER_END_EVT
= 0xfa110ede,
57 LINK_SYNCH_BEGIN_EVT
= 0xc1ccbee,
58 LINK_SYNCH_END_EVT
= 0xc1ccede
61 /* Events returned from link at packet reception or at timeout
65 TIPC_LINK_DOWN_EVT
= (1 << 1),
66 TIPC_LINK_SND_BC_ACK
= (1 << 2)
69 /* Starting value for maximum packet size negotiation on unicast links
70 * (unless bearer MTU is less)
72 #define MAX_PKT_DEFAULT 1500
74 bool tipc_link_create(struct net
*net
, char *if_name
, int bearer_id
,
75 int tolerance
, char net_plane
, u32 mtu
, int priority
,
76 int window
, u32 session
, u32 ownnode
, u32 peer
,
78 struct tipc_link
*bc_sndlink
,
79 struct tipc_link
*bc_rcvlink
,
80 struct sk_buff_head
*inputq
,
81 struct sk_buff_head
*namedq
,
82 struct tipc_link
**link
);
83 bool tipc_link_bc_create(struct net
*net
, u32 ownnode
, u32 peer
,
84 int mtu
, int window
, u16 peer_caps
,
85 struct sk_buff_head
*inputq
,
86 struct sk_buff_head
*namedq
,
87 struct tipc_link
*bc_sndlink
,
88 struct tipc_link
**link
);
89 void tipc_link_tnl_prepare(struct tipc_link
*l
, struct tipc_link
*tnl
,
90 int mtyp
, struct sk_buff_head
*xmitq
);
91 void tipc_link_build_reset_msg(struct tipc_link
*l
, struct sk_buff_head
*xmitq
);
92 int tipc_link_fsm_evt(struct tipc_link
*l
, int evt
);
93 bool tipc_link_is_up(struct tipc_link
*l
);
94 bool tipc_link_peer_is_down(struct tipc_link
*l
);
95 bool tipc_link_is_reset(struct tipc_link
*l
);
96 bool tipc_link_is_establishing(struct tipc_link
*l
);
97 bool tipc_link_is_synching(struct tipc_link
*l
);
98 bool tipc_link_is_failingover(struct tipc_link
*l
);
99 bool tipc_link_is_blocked(struct tipc_link
*l
);
100 void tipc_link_set_active(struct tipc_link
*l
, bool active
);
101 void tipc_link_reset(struct tipc_link
*l
);
102 void tipc_link_reset_stats(struct tipc_link
*l
);
103 int tipc_link_xmit(struct tipc_link
*link
, struct sk_buff_head
*list
,
104 struct sk_buff_head
*xmitq
);
105 struct sk_buff_head
*tipc_link_inputq(struct tipc_link
*l
);
106 u16
tipc_link_rcv_nxt(struct tipc_link
*l
);
107 u16
tipc_link_acked(struct tipc_link
*l
);
108 u32
tipc_link_id(struct tipc_link
*l
);
109 char *tipc_link_name(struct tipc_link
*l
);
110 char tipc_link_plane(struct tipc_link
*l
);
111 int tipc_link_prio(struct tipc_link
*l
);
112 int tipc_link_window(struct tipc_link
*l
);
113 unsigned long tipc_link_tolerance(struct tipc_link
*l
);
114 void tipc_link_set_tolerance(struct tipc_link
*l
, u32 tol
,
115 struct sk_buff_head
*xmitq
);
116 void tipc_link_set_prio(struct tipc_link
*l
, u32 prio
,
117 struct sk_buff_head
*xmitq
);
118 void tipc_link_set_abort_limit(struct tipc_link
*l
, u32 limit
);
119 void tipc_link_set_queue_limits(struct tipc_link
*l
, u32 window
);
120 int __tipc_nl_add_link(struct net
*net
, struct tipc_nl_msg
*msg
,
121 struct tipc_link
*link
, int nlflags
);
122 int tipc_nl_parse_link_prop(struct nlattr
*prop
, struct nlattr
*props
[]);
123 int tipc_link_timeout(struct tipc_link
*l
, struct sk_buff_head
*xmitq
);
124 int tipc_link_rcv(struct tipc_link
*l
, struct sk_buff
*skb
,
125 struct sk_buff_head
*xmitq
);
126 int tipc_link_build_ack_msg(struct tipc_link
*l
, struct sk_buff_head
*xmitq
);
127 void tipc_link_add_bc_peer(struct tipc_link
*snd_l
,
128 struct tipc_link
*uc_l
,
129 struct sk_buff_head
*xmitq
);
130 void tipc_link_remove_bc_peer(struct tipc_link
*snd_l
,
131 struct tipc_link
*rcv_l
,
132 struct sk_buff_head
*xmitq
);
133 int tipc_link_bc_peers(struct tipc_link
*l
);
134 void tipc_link_set_mtu(struct tipc_link
*l
, int mtu
);
135 int tipc_link_mtu(struct tipc_link
*l
);
136 void tipc_link_bc_ack_rcv(struct tipc_link
*l
, u16 acked
,
137 struct sk_buff_head
*xmitq
);
138 void tipc_link_build_bc_sync_msg(struct tipc_link
*l
,
139 struct sk_buff_head
*xmitq
);
140 void tipc_link_bc_init_rcv(struct tipc_link
*l
, struct tipc_msg
*hdr
);
141 void tipc_link_bc_sync_rcv(struct tipc_link
*l
, struct tipc_msg
*hdr
,
142 struct sk_buff_head
*xmitq
);
143 int tipc_link_bc_nack_rcv(struct tipc_link
*l
, struct sk_buff
*skb
,
144 struct sk_buff_head
*xmitq
);