blob: 45f3db3a595d0d9b7fd7f5cb14a84a5df73613e3 [file] [log] [blame]
Per Lidenb97bf3f2006-01-02 19:04:38 +01001/*
2 * net/tipc/node.h: Include file for TIPC node management routines
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +09003 *
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/**
David S. Miller6c000552008-09-02 23:38:32 -070046 * struct tipc_node - TIPC node structure
Per Lidenb97bf3f2006-01-02 19:04:38 +010047 * @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
Allan Stephens5392d642006-06-25 23:52:50 -070054 * @working_links: number of working links to node (both active and standby)
Allan Stephens5a68d5e2010-08-17 11:00:16 +000055 * @cleanup_required: non-zero if cleaning up after a prior loss of contact
Per Lidenb97bf3f2006-01-02 19:04:38 +010056 * @link_cnt: number of links to node
57 * @permit_changeover: non-zero if node has redundant links to this system
58 * @routers: bitmap (used for multicluster communication)
59 * @last_router: (used for multicluster communication)
60 * @bclink: broadcast-related info
61 * @supported: non-zero if node supports TIPC b'cast capability
62 * @acked: sequence # of last outbound b'cast message acknowledged by node
63 * @last_in: sequence # of last in-sequence b'cast message received from node
64 * @gap_after: sequence # of last message not requiring a NAK request
65 * @gap_to: sequence # of last message requiring a NAK request
66 * @nack_sync: counter that determines when NAK requests should be sent
67 * @deferred_head: oldest OOS b'cast message received from node
68 * @deferred_tail: newest OOS b'cast message received from node
69 * @defragm: list of partially reassembled b'cast message fragments from node
70 */
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +090071
David S. Miller6c000552008-09-02 23:38:32 -070072struct tipc_node {
Per Lidenb97bf3f2006-01-02 19:04:38 +010073 u32 addr;
74 spinlock_t lock;
75 struct cluster *owner;
David S. Miller6c000552008-09-02 23:38:32 -070076 struct tipc_node *next;
Per Lidenb97bf3f2006-01-02 19:04:38 +010077 struct list_head nsub;
78 struct link *active_links[2];
79 struct link *links[MAX_BEARERS];
80 int link_cnt;
Allan Stephens5392d642006-06-25 23:52:50 -070081 int working_links;
Allan Stephens5a68d5e2010-08-17 11:00:16 +000082 int cleanup_required;
Per Lidenb97bf3f2006-01-02 19:04:38 +010083 int permit_changeover;
84 u32 routers[512/32];
85 int last_router;
86 struct {
87 int supported;
88 u32 acked;
89 u32 last_in;
YOSHIFUJI Hideakic4307282007-02-09 23:25:21 +090090 u32 gap_after;
91 u32 gap_to;
Per Lidenb97bf3f2006-01-02 19:04:38 +010092 u32 nack_sync;
93 struct sk_buff *deferred_head;
94 struct sk_buff *deferred_tail;
95 struct sk_buff *defragm;
96 } bclink;
97};
98
David S. Miller6c000552008-09-02 23:38:32 -070099extern struct tipc_node *tipc_nodes;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100100extern u32 tipc_own_tag;
101
David S. Miller6c000552008-09-02 23:38:32 -0700102struct tipc_node *tipc_node_create(u32 addr);
103void tipc_node_delete(struct tipc_node *n_ptr);
104struct tipc_node *tipc_node_attach_link(struct link *l_ptr);
105void tipc_node_detach_link(struct tipc_node *n_ptr, struct link *l_ptr);
106void tipc_node_link_down(struct tipc_node *n_ptr, struct link *l_ptr);
107void tipc_node_link_up(struct tipc_node *n_ptr, struct link *l_ptr);
108int tipc_node_has_active_links(struct tipc_node *n_ptr);
109int tipc_node_has_redundant_links(struct tipc_node *n_ptr);
110u32 tipc_node_select_router(struct tipc_node *n_ptr, u32 ref);
111struct tipc_node *tipc_node_select_next_hop(u32 addr, u32 selector);
112int tipc_node_is_up(struct tipc_node *n_ptr);
113void tipc_node_add_router(struct tipc_node *n_ptr, u32 router);
114void tipc_node_remove_router(struct tipc_node *n_ptr, u32 router);
Per Liden4323add2006-01-18 00:38:21 +0100115struct sk_buff *tipc_node_get_links(const void *req_tlv_area, int req_tlv_space);
116struct sk_buff *tipc_node_get_nodes(const void *req_tlv_area, int req_tlv_space);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100117
David S. Miller6c000552008-09-02 23:38:32 -0700118static inline struct tipc_node *tipc_node_find(u32 addr)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100119{
120 if (likely(in_own_cluster(addr)))
Per Liden4323add2006-01-18 00:38:21 +0100121 return tipc_local_nodes[tipc_node(addr)];
122 else if (tipc_addr_domain_valid(addr)) {
123 struct cluster *c_ptr = tipc_cltr_find(addr);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100124
125 if (c_ptr)
126 return c_ptr->nodes[tipc_node(addr)];
127 }
Sam Ravnborg1fc54d82006-03-20 22:36:47 -0800128 return NULL;
Per Lidenb97bf3f2006-01-02 19:04:38 +0100129}
130
David S. Miller6c000552008-09-02 23:38:32 -0700131static inline struct tipc_node *tipc_node_select(u32 addr, u32 selector)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100132{
133 if (likely(in_own_cluster(addr)))
Per Liden4323add2006-01-18 00:38:21 +0100134 return tipc_local_nodes[tipc_node(addr)];
135 return tipc_node_select_next_hop(addr, selector);
Per Lidenb97bf3f2006-01-02 19:04:38 +0100136}
137
David S. Miller6c000552008-09-02 23:38:32 -0700138static inline void tipc_node_lock(struct tipc_node *n_ptr)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100139{
140 spin_lock_bh(&n_ptr->lock);
141}
142
David S. Miller6c000552008-09-02 23:38:32 -0700143static inline void tipc_node_unlock(struct tipc_node *n_ptr)
Per Lidenb97bf3f2006-01-02 19:04:38 +0100144{
145 spin_unlock_bh(&n_ptr->lock);
146}
147
148#endif