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Per Lidenb97bf3f2006-01-02 19:04:38 +01001/*
2 * net/tipc/node.h: Include file for TIPC node management routines
3 *
Per Liden593a5f22006-01-11 19:14:19 +01004 * Copyright (c) 2000-2006, Ericsson AB
Per Lidenb97bf3f2006-01-02 19:04:38 +01005 * Copyright (c) 2005, Wind River Systems
Per Lidenb97bf3f2006-01-02 19:04:38 +01006 * All rights reserved.
7 *
Per Liden9ea1fd32006-01-11 13:30:43 +01008 * Redistribution and use in source and binary forms, with or without
Per Lidenb97bf3f2006-01-02 19:04:38 +01009 * modification, are permitted provided that the following conditions are met:
10 *
Per Liden9ea1fd32006-01-11 13:30:43 +010011 * 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.
Per Lidenb97bf3f2006-01-02 19:04:38 +010019 *
Per Liden9ea1fd32006-01-11 13:30:43 +010020 * 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
Per Lidenb97bf3f2006-01-02 19:04:38 +010034 * 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 "cluster.h"
43#include "bearer.h"
44
45/**
46 * struct node - TIPC node structure
47 * @addr: network address of node
48 * @lock: spinlock governing access to structure
49 * @owner: pointer to cluster that node belongs to
50 * @next: pointer to next node in sorted list of cluster's nodes
51 * @nsub: list of "node down" subscriptions monitoring node
52 * @active_links: pointers to active links to node
53 * @links: pointers to all links to node
54 * @link_cnt: number of links to node
55 * @permit_changeover: non-zero if node has redundant links to this system
56 * @routers: bitmap (used for multicluster communication)
57 * @last_router: (used for multicluster communication)
58 * @bclink: broadcast-related info
59 * @supported: non-zero if node supports TIPC b'cast capability
60 * @acked: sequence # of last outbound b'cast message acknowledged by node
61 * @last_in: sequence # of last in-sequence b'cast message received from node
62 * @gap_after: sequence # of last message not requiring a NAK request
63 * @gap_to: sequence # of last message requiring a NAK request
64 * @nack_sync: counter that determines when NAK requests should be sent
65 * @deferred_head: oldest OOS b'cast message received from node
66 * @deferred_tail: newest OOS b'cast message received from node
67 * @defragm: list of partially reassembled b'cast message fragments from node
68 */
69
70struct node {
71 u32 addr;
72 spinlock_t lock;
73 struct cluster *owner;
74 struct node *next;
75 struct list_head nsub;
76 struct link *active_links[2];
77 struct link *links[MAX_BEARERS];
78 int link_cnt;
79 int permit_changeover;
80 u32 routers[512/32];
81 int last_router;
82 struct {
83 int supported;
84 u32 acked;
85 u32 last_in;
86 u32 gap_after;
87 u32 gap_to;
88 u32 nack_sync;
89 struct sk_buff *deferred_head;
90 struct sk_buff *deferred_tail;
91 struct sk_buff *defragm;
92 } bclink;
93};
94
Per Liden4323add2006-01-18 00:38:21 +010095extern struct node *tipc_nodes;
Per Lidenb97bf3f2006-01-02 19:04:38 +010096extern u32 tipc_own_tag;
97
Per Liden4323add2006-01-18 00:38:21 +010098struct node *tipc_node_create(u32 addr);
99void tipc_node_delete(struct node *n_ptr);
100struct node *tipc_node_attach_link(struct link *l_ptr);
101void tipc_node_detach_link(struct node *n_ptr, struct link *l_ptr);
102void tipc_node_link_down(struct node *n_ptr, struct link *l_ptr);
103void tipc_node_link_up(struct node *n_ptr, struct link *l_ptr);
104int tipc_node_has_active_links(struct node *n_ptr);
105int tipc_node_has_redundant_links(struct node *n_ptr);
106u32 tipc_node_select_router(struct node *n_ptr, u32 ref);
107struct node *tipc_node_select_next_hop(u32 addr, u32 selector);
108int tipc_node_is_up(struct node *n_ptr);
109void tipc_node_add_router(struct node *n_ptr, u32 router);
110void tipc_node_remove_router(struct node *n_ptr, u32 router);
111struct sk_buff *tipc_node_get_links(const void *req_tlv_area, int req_tlv_space);
112struct sk_buff *tipc_node_get_nodes(const void *req_tlv_area, int req_tlv_space);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100113
Per Liden4323add2006-01-18 00:38:21 +0100114static inline struct node *tipc_node_find(u32 addr)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100115{
116 if (likely(in_own_cluster(addr)))
Per Liden4323add2006-01-18 00:38:21 +0100117 return tipc_local_nodes[tipc_node(addr)];
118 else if (tipc_addr_domain_valid(addr)) {
119 struct cluster *c_ptr = tipc_cltr_find(addr);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100120
121 if (c_ptr)
122 return c_ptr->nodes[tipc_node(addr)];
123 }
Sam Ravnborg1fc54d82006-03-20 22:36:47 -0800124 return NULL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100125}
126
Per Liden4323add2006-01-18 00:38:21 +0100127static inline struct node *tipc_node_select(u32 addr, u32 selector)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100128{
129 if (likely(in_own_cluster(addr)))
Per Liden4323add2006-01-18 00:38:21 +0100130 return tipc_local_nodes[tipc_node(addr)];
131 return tipc_node_select_next_hop(addr, selector);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100132}
133
Per Liden4323add2006-01-18 00:38:21 +0100134static inline void tipc_node_lock(struct node *n_ptr)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100135{
136 spin_lock_bh(&n_ptr->lock);
137}
138
Per Liden4323add2006-01-18 00:38:21 +0100139static inline void tipc_node_unlock(struct node *n_ptr)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100140{
141 spin_unlock_bh(&n_ptr->lock);
142}
143
144#endif