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b97bf3fd PL |
1 | /* |
2 | * net/tipc/node.h: Include file for TIPC node management routines | |
c4307285 | 3 | * |
593a5f22 | 4 | * Copyright (c) 2000-2006, Ericsson AB |
46651c59 | 5 | * Copyright (c) 2005, 2010-2014, 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_NODE_H | |
38 | #define _TIPC_NODE_H | |
39 | ||
40 | #include "node_subscr.h" | |
8f92df6a AS |
41 | #include "addr.h" |
42 | #include "net.h" | |
b97bf3fd PL |
43 | #include "bearer.h" |
44 | ||
fc0eea69 AS |
45 | /* |
46 | * Out-of-range value for node signature | |
47 | */ | |
48 | #define INVALID_NODE_SIG 0x10000 | |
49 | ||
10f465c4 YX |
50 | /* Flags used to block (re)establishment of contact with a neighboring node |
51 | * TIPC_NODE_DOWN: indicate node is down | |
52 | * TIPC_NAMES_GONE: indicate the node's publications are purged | |
53 | * TIPC_NODE_RESET: indicate node is reset | |
54 | */ | |
55 | enum { | |
56 | TIPC_NODE_DOWN = (1 << 1), | |
57 | TIPC_NAMES_GONE = (1 << 2), | |
58 | TIPC_NODE_RESET = (1 << 3) | |
59 | }; | |
b4b56102 | 60 | |
486f930a YX |
61 | /** |
62 | * struct tipc_node_bclink - TIPC node bclink structure | |
63 | * @acked: sequence # of last outbound b'cast message acknowledged by node | |
64 | * @last_in: sequence # of last in-sequence b'cast message received from node | |
65 | * @last_sent: sequence # of last b'cast message sent by node | |
66 | * @oos_state: state tracker for handling OOS b'cast messages | |
67 | * @deferred_size: number of OOS b'cast messages in deferred queue | |
68 | * @deferred_head: oldest OOS b'cast message received from node | |
69 | * @deferred_tail: newest OOS b'cast message received from node | |
70 | * @reasm_head: broadcast reassembly queue head from node | |
71 | * @reasm_tail: last broadcast fragment received from node | |
72 | * @recv_permitted: true if node is allowed to receive b'cast messages | |
73 | */ | |
74 | struct tipc_node_bclink { | |
75 | u32 acked; | |
76 | u32 last_in; | |
77 | u32 last_sent; | |
78 | u32 oos_state; | |
79 | u32 deferred_size; | |
80 | struct sk_buff *deferred_head; | |
81 | struct sk_buff *deferred_tail; | |
82 | struct sk_buff *reasm_head; | |
83 | struct sk_buff *reasm_tail; | |
84 | bool recv_permitted; | |
85 | }; | |
86 | ||
b97bf3fd | 87 | /** |
6c00055a | 88 | * struct tipc_node - TIPC node structure |
b97bf3fd PL |
89 | * @addr: network address of node |
90 | * @lock: spinlock governing access to structure | |
672d99e1 | 91 | * @hash: links to adjacent nodes in unsorted hash chain |
b97bf3fd PL |
92 | * @active_links: pointers to active links to node |
93 | * @links: pointers to all links to node | |
10f465c4 | 94 | * @flags: bit mask of conditions preventing link establishment to node |
486f930a YX |
95 | * @bclink: broadcast-related info |
96 | * @list: links to adjacent nodes in sorted list of cluster's nodes | |
97 | * @working_links: number of working links to node (both active and standby) | |
b97bf3fd | 98 | * @link_cnt: number of links to node |
fc0eea69 | 99 | * @signature: node instance identifier |
486f930a | 100 | * @nsub: list of "node down" subscriptions monitoring node |
6c7a762e | 101 | * @rcu: rcu struct for tipc_node |
b97bf3fd | 102 | */ |
6c00055a | 103 | struct tipc_node { |
b97bf3fd PL |
104 | u32 addr; |
105 | spinlock_t lock; | |
672d99e1 | 106 | struct hlist_node hash; |
a18c4bc3 PG |
107 | struct tipc_link *active_links[2]; |
108 | struct tipc_link *links[MAX_BEARERS]; | |
10f465c4 | 109 | unsigned int flags; |
486f930a YX |
110 | struct tipc_node_bclink bclink; |
111 | struct list_head list; | |
b97bf3fd | 112 | int link_cnt; |
5392d646 | 113 | int working_links; |
fc0eea69 | 114 | u32 signature; |
486f930a | 115 | struct list_head nsub; |
6c7a762e | 116 | struct rcu_head rcu; |
b97bf3fd PL |
117 | }; |
118 | ||
672d99e1 AS |
119 | extern struct list_head tipc_node_list; |
120 | ||
672d99e1 | 121 | struct tipc_node *tipc_node_find(u32 addr); |
6c00055a | 122 | struct tipc_node *tipc_node_create(u32 addr); |
46651c59 | 123 | void tipc_node_stop(void); |
a18c4bc3 PG |
124 | void tipc_node_attach_link(struct tipc_node *n_ptr, struct tipc_link *l_ptr); |
125 | void tipc_node_detach_link(struct tipc_node *n_ptr, struct tipc_link *l_ptr); | |
126 | void tipc_node_link_down(struct tipc_node *n_ptr, struct tipc_link *l_ptr); | |
127 | void tipc_node_link_up(struct tipc_node *n_ptr, struct tipc_link *l_ptr); | |
8f19afb2 | 128 | int tipc_node_active_links(struct tipc_node *n_ptr); |
6c00055a | 129 | int tipc_node_is_up(struct tipc_node *n_ptr); |
4323add6 PL |
130 | struct sk_buff *tipc_node_get_links(const void *req_tlv_area, int req_tlv_space); |
131 | struct sk_buff *tipc_node_get_nodes(const void *req_tlv_area, int req_tlv_space); | |
78acb1f9 | 132 | int tipc_node_get_linkname(u32 bearer_id, u32 node, char *linkname, size_t len); |
b97bf3fd | 133 | |
6c00055a | 134 | static inline void tipc_node_lock(struct tipc_node *n_ptr) |
b97bf3fd PL |
135 | { |
136 | spin_lock_bh(&n_ptr->lock); | |
137 | } | |
138 | ||
6c00055a | 139 | static inline void tipc_node_unlock(struct tipc_node *n_ptr) |
b97bf3fd PL |
140 | { |
141 | spin_unlock_bh(&n_ptr->lock); | |
142 | } | |
143 | ||
10f465c4 YX |
144 | static inline bool tipc_node_blocked(struct tipc_node *node) |
145 | { | |
146 | return (node->flags & (TIPC_NODE_DOWN | TIPC_NAMES_GONE | | |
147 | TIPC_NODE_RESET)); | |
148 | } | |
149 | ||
b97bf3fd | 150 | #endif |