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1 | /* |
2 | * net/tipc/node.h: Include file for TIPC node management routines |
3 | * |
4 | * Copyright (c) 2000-2006, 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_NODE_H |
38 | #define _TIPC_NODE_H |
39 | |
40 | #include "node_subscr.h" |
41 | #include "addr.h" |
42 | #include "net.h" |
43 | #include "bearer.h" |
44 | |
45 | /* |
46 | * Out-of-range value for node signature |
47 | */ |
48 | #define INVALID_NODE_SIG 0x10000 |
49 | |
50 | /* Flags used to block (re)establishment of contact with a neighboring node */ |
51 | |
52 | #define WAIT_PEER_DOWN 0x0001 /* wait to see that peer's links are down */ |
53 | #define WAIT_NAMES_GONE 0x0002 /* wait for peer's publications to be purged */ |
54 | #define WAIT_NODE_DOWN 0x0004 /* wait until peer node is declared down */ |
55 | |
56 | /** |
57 | * struct tipc_node - TIPC node structure |
58 | * @addr: network address of node |
59 | * @lock: spinlock governing access to structure |
60 | * @hash: links to adjacent nodes in unsorted hash chain |
61 | * @list: links to adjacent nodes in sorted list of cluster's nodes |
62 | * @nsub: list of "node down" subscriptions monitoring node |
63 | * @active_links: pointers to active links to node |
64 | * @links: pointers to all links to node |
65 | * @working_links: number of working links to node (both active and standby) |
66 | * @block_setup: bit mask of conditions preventing link establishment to node |
67 | * @link_cnt: number of links to node |
68 | * @permit_changeover: non-zero if node has redundant links to this system |
69 | * @signature: node instance identifier |
70 | * @bclink: broadcast-related info |
71 | * @supportable: non-zero if node supports TIPC b'cast link capability |
72 | * @supported: non-zero if node supports TIPC b'cast capability |
73 | * @acked: sequence # of last outbound b'cast message acknowledged by node |
74 | * @last_in: sequence # of last in-sequence b'cast message received from node |
75 | * @last_sent: sequence # of last b'cast message sent by node |
76 | * @oos_state: state tracker for handling OOS b'cast messages |
77 | * @deferred_size: number of OOS b'cast messages in deferred queue |
78 | * @deferred_head: oldest OOS b'cast message received from node |
79 | * @deferred_tail: newest OOS b'cast message received from node |
80 | * @defragm: list of partially reassembled b'cast message fragments from node |
81 | */ |
82 | |
83 | struct tipc_node { |
84 | u32 addr; |
85 | spinlock_t lock; |
86 | struct hlist_node hash; |
87 | struct list_head list; |
88 | struct list_head nsub; |
89 | struct tipc_link *active_links[2]; |
90 | struct tipc_link *links[MAX_BEARERS]; |
91 | int link_cnt; |
92 | int working_links; |
93 | int block_setup; |
94 | int permit_changeover; |
95 | u32 signature; |
96 | struct { |
97 | u8 supportable; |
98 | u8 supported; |
99 | u32 acked; |
100 | u32 last_in; |
101 | u32 last_sent; |
102 | u32 oos_state; |
103 | u32 deferred_size; |
104 | struct sk_buff *deferred_head; |
105 | struct sk_buff *deferred_tail; |
106 | struct sk_buff *defragm; |
107 | } bclink; |
108 | }; |
109 | |
110 | extern struct list_head tipc_node_list; |
111 | |
112 | struct tipc_node *tipc_node_find(u32 addr); |
113 | struct tipc_node *tipc_node_create(u32 addr); |
114 | void tipc_node_delete(struct tipc_node *n_ptr); |
115 | void tipc_node_attach_link(struct tipc_node *n_ptr, struct tipc_link *l_ptr); |
116 | void tipc_node_detach_link(struct tipc_node *n_ptr, struct tipc_link *l_ptr); |
117 | void tipc_node_link_down(struct tipc_node *n_ptr, struct tipc_link *l_ptr); |
118 | void tipc_node_link_up(struct tipc_node *n_ptr, struct tipc_link *l_ptr); |
119 | int tipc_node_active_links(struct tipc_node *n_ptr); |
120 | int tipc_node_redundant_links(struct tipc_node *n_ptr); |
121 | int tipc_node_is_up(struct tipc_node *n_ptr); |
122 | struct sk_buff *tipc_node_get_links(const void *req_tlv_area, int req_tlv_space); |
123 | struct sk_buff *tipc_node_get_nodes(const void *req_tlv_area, int req_tlv_space); |
124 | |
125 | static inline void tipc_node_lock(struct tipc_node *n_ptr) |
126 | { |
127 | spin_lock_bh(&n_ptr->lock); |
128 | } |
129 | |
130 | static inline void tipc_node_unlock(struct tipc_node *n_ptr) |
131 | { |
132 | spin_unlock_bh(&n_ptr->lock); |
133 | } |
134 | |
135 | #endif |
136 |
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