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b97bf3fd PL |
1 | /* |
2 | * net/tipc/node.h: Include file for TIPC node management routines | |
c4307285 | 3 | * |
cb1b7280 | 4 | * Copyright (c) 2000-2006, 2014-2015, 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 | ||
8f92df6a AS |
40 | #include "addr.h" |
41 | #include "net.h" | |
b97bf3fd | 42 | #include "bearer.h" |
16e166b8 | 43 | #include "msg.h" |
b97bf3fd | 44 | |
f2f9800d YX |
45 | /* Out-of-range value for node signature */ |
46 | #define INVALID_NODE_SIG 0x10000 | |
47 | ||
aecb9bb8 YX |
48 | /* Flags used to take different actions according to flag type |
49 | * TIPC_WAIT_PEER_LINKS_DOWN: wait to see that peer's links are down | |
50 | * TIPC_WAIT_OWN_LINKS_DOWN: wait until peer node is declared down | |
51 | * TIPC_NOTIFY_NODE_DOWN: notify node is down | |
52 | * TIPC_NOTIFY_NODE_UP: notify node is up | |
7b8613e0 | 53 | * TIPC_DISTRIBUTE_NAME: publish or withdraw link state name type |
10f465c4 YX |
54 | */ |
55 | enum { | |
c637c103 | 56 | TIPC_MSG_EVT = 1, |
aecb9bb8 YX |
57 | TIPC_WAIT_PEER_LINKS_DOWN = (1 << 1), |
58 | TIPC_WAIT_OWN_LINKS_DOWN = (1 << 2), | |
59 | TIPC_NOTIFY_NODE_DOWN = (1 << 3), | |
50100a5e | 60 | TIPC_NOTIFY_NODE_UP = (1 << 4), |
c637c103 JPM |
61 | TIPC_WAKEUP_BCAST_USERS = (1 << 5), |
62 | TIPC_NOTIFY_LINK_UP = (1 << 6), | |
63 | TIPC_NOTIFY_LINK_DOWN = (1 << 7), | |
cb1b7280 | 64 | TIPC_NAMED_MSG_EVT = (1 << 8), |
b952b2be YX |
65 | TIPC_BCAST_MSG_EVT = (1 << 9), |
66 | TIPC_BCAST_RESET = (1 << 10) | |
10f465c4 | 67 | }; |
b4b56102 | 68 | |
486f930a YX |
69 | /** |
70 | * struct tipc_node_bclink - TIPC node bclink structure | |
71 | * @acked: sequence # of last outbound b'cast message acknowledged by node | |
72 | * @last_in: sequence # of last in-sequence b'cast message received from node | |
73 | * @last_sent: sequence # of last b'cast message sent by node | |
74 | * @oos_state: state tracker for handling OOS b'cast messages | |
bc6fecd4 | 75 | * @deferred_queue: deferred queue saved OOS b'cast message received from node |
37e22164 | 76 | * @reasm_buf: broadcast reassembly queue head from node |
cb1b7280 | 77 | * @inputq_map: bitmap indicating which inqueues should be kicked |
486f930a YX |
78 | * @recv_permitted: true if node is allowed to receive b'cast messages |
79 | */ | |
80 | struct tipc_node_bclink { | |
81 | u32 acked; | |
82 | u32 last_in; | |
83 | u32 last_sent; | |
84 | u32 oos_state; | |
85 | u32 deferred_size; | |
05dcc5aa | 86 | struct sk_buff_head deferdq; |
37e22164 | 87 | struct sk_buff *reasm_buf; |
cb1b7280 | 88 | int inputq_map; |
486f930a YX |
89 | bool recv_permitted; |
90 | }; | |
91 | ||
9d13ec65 JPM |
92 | struct tipc_link_entry { |
93 | struct tipc_link *link; | |
94 | u32 mtu; | |
95 | }; | |
96 | ||
b97bf3fd | 97 | /** |
6c00055a | 98 | * struct tipc_node - TIPC node structure |
b97bf3fd | 99 | * @addr: network address of node |
8a0f6ebe | 100 | * @ref: reference counter to node object |
b97bf3fd | 101 | * @lock: spinlock governing access to structure |
f2f9800d | 102 | * @net: the applicable net namespace |
672d99e1 | 103 | * @hash: links to adjacent nodes in unsorted hash chain |
c637c103 JPM |
104 | * @inputq: pointer to input queue containing messages for msg event |
105 | * @namedq: pointer to name table input queue with name table messages | |
9d13ec65 JPM |
106 | * @active_links: pointer into links[] array, identifying which links are active |
107 | * @links: array containing references to all links to node | |
aecb9bb8 | 108 | * @action_flags: bit mask of different types of node actions |
486f930a YX |
109 | * @bclink: broadcast-related info |
110 | * @list: links to adjacent nodes in sorted list of cluster's nodes | |
111 | * @working_links: number of working links to node (both active and standby) | |
b97bf3fd | 112 | * @link_cnt: number of links to node |
7764d6e8 | 113 | * @capabilities: bitmap, indicating peer node's functional capabilities |
fc0eea69 | 114 | * @signature: node instance identifier |
7b8613e0 | 115 | * @link_id: local and remote bearer ids of changing link, if any |
a8f48af5 | 116 | * @publ_list: list of publications |
6c7a762e | 117 | * @rcu: rcu struct for tipc_node |
b97bf3fd | 118 | */ |
6c00055a | 119 | struct tipc_node { |
b97bf3fd | 120 | u32 addr; |
8a0f6ebe | 121 | struct kref kref; |
b97bf3fd | 122 | spinlock_t lock; |
f2f9800d | 123 | struct net *net; |
672d99e1 | 124 | struct hlist_node hash; |
c637c103 JPM |
125 | struct sk_buff_head *inputq; |
126 | struct sk_buff_head *namedq; | |
9d13ec65 JPM |
127 | struct tipc_link_entry *active_links[2]; |
128 | struct tipc_link_entry links[MAX_BEARERS]; | |
c637c103 | 129 | int action_flags; |
486f930a YX |
130 | struct tipc_node_bclink bclink; |
131 | struct list_head list; | |
b97bf3fd | 132 | int link_cnt; |
7764d6e8 JPM |
133 | u16 working_links; |
134 | u16 capabilities; | |
fc0eea69 | 135 | u32 signature; |
7b8613e0 | 136 | u32 link_id; |
a8f48af5 | 137 | struct list_head publ_list; |
02be61a9 | 138 | struct list_head conn_sks; |
6c7a762e | 139 | struct rcu_head rcu; |
b97bf3fd PL |
140 | }; |
141 | ||
f2f9800d | 142 | struct tipc_node *tipc_node_find(struct net *net, u32 addr); |
8a0f6ebe | 143 | void tipc_node_put(struct tipc_node *node); |
f2f9800d YX |
144 | struct tipc_node *tipc_node_create(struct net *net, u32 addr); |
145 | void tipc_node_stop(struct net *net); | |
a18c4bc3 PG |
146 | void tipc_node_attach_link(struct tipc_node *n_ptr, struct tipc_link *l_ptr); |
147 | void tipc_node_detach_link(struct tipc_node *n_ptr, struct tipc_link *l_ptr); | |
9d13ec65 JPM |
148 | void tipc_node_link_down(struct tipc_node *n_ptr, int bearer_id); |
149 | void tipc_node_link_up(struct tipc_node *n_ptr, int bearer_id); | |
150 | bool tipc_node_is_up(struct tipc_node *n); | |
f2f9800d YX |
151 | int tipc_node_get_linkname(struct net *net, u32 bearer_id, u32 node, |
152 | char *linkname, size_t len); | |
9db9fdd1 | 153 | void tipc_node_unlock(struct tipc_node *node); |
f2f9800d YX |
154 | int tipc_node_add_conn(struct net *net, u32 dnode, u32 port, u32 peer_port); |
155 | void tipc_node_remove_conn(struct net *net, u32 dnode, u32 port); | |
b97bf3fd | 156 | |
3e4b6ab5 RA |
157 | int tipc_nl_node_dump(struct sk_buff *skb, struct netlink_callback *cb); |
158 | ||
9db9fdd1 | 159 | static inline void tipc_node_lock(struct tipc_node *node) |
b97bf3fd | 160 | { |
9db9fdd1 | 161 | spin_lock_bh(&node->lock); |
b97bf3fd PL |
162 | } |
163 | ||
10f465c4 YX |
164 | static inline bool tipc_node_blocked(struct tipc_node *node) |
165 | { | |
aecb9bb8 YX |
166 | return (node->action_flags & (TIPC_WAIT_PEER_LINKS_DOWN | |
167 | TIPC_NOTIFY_NODE_DOWN | TIPC_WAIT_OWN_LINKS_DOWN)); | |
10f465c4 YX |
168 | } |
169 | ||
9d13ec65 | 170 | static inline struct tipc_link *node_active_link(struct tipc_node *n, int sel) |
16e166b8 | 171 | { |
9d13ec65 | 172 | struct tipc_link_entry *le = n->active_links[sel & 1]; |
16e166b8 | 173 | |
9d13ec65 JPM |
174 | if (likely(le)) |
175 | return le->link; | |
176 | return NULL; | |
177 | } | |
16e166b8 | 178 | |
9d13ec65 JPM |
179 | static inline uint tipc_node_get_mtu(struct net *net, u32 addr, u32 selector) |
180 | { | |
181 | struct tipc_node *n; | |
182 | struct tipc_link_entry *le; | |
183 | unsigned int mtu = MAX_MSG_SIZE; | |
16e166b8 | 184 | |
9d13ec65 JPM |
185 | n = tipc_node_find(net, addr); |
186 | if (unlikely(!n)) | |
187 | return mtu; | |
188 | le = n->active_links[selector & 1]; | |
189 | if (likely(le)) | |
190 | mtu = le->mtu; | |
191 | tipc_node_put(n); | |
16e166b8 JPM |
192 | return mtu; |
193 | } | |
194 | ||
b97bf3fd | 195 | #endif |