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2 * net/tipc/node.h: Include file for TIPC node management routines
4 * Copyright (c) 2000-2006, 2014-2015, Ericsson AB
5 * Copyright (c) 2005, 2010-2014, Wind River Systems
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21 * GNU General Public License ("GPL") version 2 as published by the Free
22 * Software Foundation.
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45 /* Out-of-range value for node signature */
46 #define INVALID_NODE_SIG 0x10000
48 #define INVALID_BEARER_ID -1
50 /* Flags used to take different actions according to flag type
51 * TIPC_NOTIFY_NODE_DOWN: notify node is down
52 * TIPC_NOTIFY_NODE_UP: notify node is up
53 * TIPC_DISTRIBUTE_NAME: publish or withdraw link state name type
57 TIPC_NOTIFY_NODE_DOWN
= (1 << 3),
58 TIPC_NOTIFY_NODE_UP
= (1 << 4),
59 TIPC_WAKEUP_BCAST_USERS
= (1 << 5),
60 TIPC_NOTIFY_LINK_UP
= (1 << 6),
61 TIPC_NOTIFY_LINK_DOWN
= (1 << 7),
62 TIPC_NAMED_MSG_EVT
= (1 << 8),
63 TIPC_BCAST_MSG_EVT
= (1 << 9),
64 TIPC_BCAST_RESET
= (1 << 10)
68 * struct tipc_node_bclink - TIPC node bclink structure
69 * @acked: sequence # of last outbound b'cast message acknowledged by node
70 * @last_in: sequence # of last in-sequence b'cast message received from node
71 * @last_sent: sequence # of last b'cast message sent by node
72 * @oos_state: state tracker for handling OOS b'cast messages
73 * @deferred_queue: deferred queue saved OOS b'cast message received from node
74 * @reasm_buf: broadcast reassembly queue head from node
75 * @inputq_map: bitmap indicating which inqueues should be kicked
76 * @recv_permitted: true if node is allowed to receive b'cast messages
78 struct tipc_node_bclink
{
84 struct sk_buff_head deferdq
;
85 struct sk_buff
*reasm_buf
;
86 struct sk_buff_head namedq
;
90 struct tipc_link_entry
{
91 struct tipc_link
*link
;
93 struct sk_buff_head inputq
;
94 struct tipc_media_addr maddr
;
98 * struct tipc_node - TIPC node structure
99 * @addr: network address of node
100 * @ref: reference counter to node object
101 * @lock: spinlock governing access to structure
102 * @net: the applicable net namespace
103 * @hash: links to adjacent nodes in unsorted hash chain
104 * @inputq: pointer to input queue containing messages for msg event
105 * @namedq: pointer to name table input queue with name table messages
106 * @active_links: bearer ids of active links, used as index into links[] array
107 * @links: array containing references to all links to node
108 * @action_flags: bit mask of different types of node actions
109 * @bclink: broadcast-related info
110 * @state: connectivity state vs peer node
111 * @sync_point: sequence number where synch/failover is finished
112 * @list: links to adjacent nodes in sorted list of cluster's nodes
113 * @working_links: number of working links to node (both active and standby)
114 * @link_cnt: number of links to node
115 * @capabilities: bitmap, indicating peer node's functional capabilities
116 * @signature: node instance identifier
117 * @link_id: local and remote bearer ids of changing link, if any
118 * @publ_list: list of publications
119 * @rcu: rcu struct for tipc_node
126 struct hlist_node hash
;
127 struct sk_buff_head
*inputq
;
128 struct sk_buff_head
*namedq
;
130 struct tipc_link_entry links
[MAX_BEARERS
];
132 struct tipc_node_bclink bclink
;
133 struct list_head list
;
141 struct list_head publ_list
;
142 struct list_head conn_sks
;
143 unsigned long keepalive_intv
;
144 struct timer_list timer
;
148 struct tipc_node
*tipc_node_find(struct net
*net
, u32 addr
);
149 void tipc_node_put(struct tipc_node
*node
);
150 void tipc_node_stop(struct net
*net
);
151 void tipc_node_check_dest(struct net
*net
, u32 onode
,
152 struct tipc_bearer
*bearer
,
153 u16 capabilities
, u32 signature
,
154 struct tipc_media_addr
*maddr
,
155 bool *respond
, bool *dupl_addr
);
156 void tipc_node_delete_links(struct net
*net
, int bearer_id
);
157 void tipc_node_attach_link(struct tipc_node
*n_ptr
, struct tipc_link
*l_ptr
);
158 void tipc_node_detach_link(struct tipc_node
*n_ptr
, struct tipc_link
*l_ptr
);
159 bool tipc_node_is_up(struct tipc_node
*n
);
160 int tipc_node_get_linkname(struct net
*net
, u32 bearer_id
, u32 node
,
161 char *linkname
, size_t len
);
162 void tipc_node_unlock(struct tipc_node
*node
);
163 int tipc_node_xmit(struct net
*net
, struct sk_buff_head
*list
, u32 dnode
,
165 int tipc_node_xmit_skb(struct net
*net
, struct sk_buff
*skb
, u32 dest
,
167 int tipc_node_add_conn(struct net
*net
, u32 dnode
, u32 port
, u32 peer_port
);
168 void tipc_node_remove_conn(struct net
*net
, u32 dnode
, u32 port
);
169 int tipc_nl_node_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
);
171 static inline void tipc_node_lock(struct tipc_node
*node
)
173 spin_lock_bh(&node
->lock
);
176 static inline struct tipc_link
*node_active_link(struct tipc_node
*n
, int sel
)
178 int bearer_id
= n
->active_links
[sel
& 1];
180 if (unlikely(bearer_id
== INVALID_BEARER_ID
))
183 return n
->links
[bearer_id
].link
;
186 static inline unsigned int tipc_node_get_mtu(struct net
*net
, u32 addr
, u32 sel
)
190 unsigned int mtu
= MAX_MSG_SIZE
;
192 n
= tipc_node_find(net
, addr
);
196 bearer_id
= n
->active_links
[sel
& 1];
197 if (likely(bearer_id
!= INVALID_BEARER_ID
))
198 mtu
= n
->links
[bearer_id
].mtu
;