2 * net/tipc/node.h: Include file for TIPC node management routines
4 * Copyright (c) 2000-2006, Ericsson AB
5 * Copyright (c) 2005, Wind River Systems
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40 #include "node_subscr.h"
46 * struct tipc_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 * @working_links: number of working links to node (both active and standby)
55 * @link_cnt: number of links to node
56 * @permit_changeover: non-zero if node has redundant links to this system
57 * @routers: bitmap (used for multicluster communication)
58 * @last_router: (used for multicluster communication)
59 * @bclink: broadcast-related info
60 * @supported: non-zero if node supports TIPC b'cast capability
61 * @acked: sequence # of last outbound b'cast message acknowledged by node
62 * @last_in: sequence # of last in-sequence b'cast message received from node
63 * @gap_after: sequence # of last message not requiring a NAK request
64 * @gap_to: sequence # of last message requiring a NAK request
65 * @nack_sync: counter that determines when NAK requests should be sent
66 * @deferred_head: oldest OOS b'cast message received from node
67 * @deferred_tail: newest OOS b'cast message received from node
68 * @defragm: list of partially reassembled b'cast message fragments from node
74 struct cluster *owner;
75 struct tipc_node *next;
76 struct list_head nsub;
77 struct link *active_links[2];
78 struct link *links[MAX_BEARERS];
81 int permit_changeover;
91 struct sk_buff *deferred_head;
92 struct sk_buff *deferred_tail;
93 struct sk_buff *defragm;
97 extern struct tipc_node *tipc_nodes;
98 extern u32 tipc_own_tag;
100 struct tipc_node *tipc_node_create(u32 addr);
101 void tipc_node_delete(struct tipc_node *n_ptr);
102 struct tipc_node *tipc_node_attach_link(struct link *l_ptr);
103 void tipc_node_detach_link(struct tipc_node *n_ptr, struct link *l_ptr);
104 void tipc_node_link_down(struct tipc_node *n_ptr, struct link *l_ptr);
105 void tipc_node_link_up(struct tipc_node *n_ptr, struct link *l_ptr);
106 int tipc_node_has_active_links(struct tipc_node *n_ptr);
107 int tipc_node_has_redundant_links(struct tipc_node *n_ptr);
108 u32 tipc_node_select_router(struct tipc_node *n_ptr, u32 ref);
109 struct tipc_node *tipc_node_select_next_hop(u32 addr, u32 selector);
110 int tipc_node_is_up(struct tipc_node *n_ptr);
111 void tipc_node_add_router(struct tipc_node *n_ptr, u32 router);
112 void tipc_node_remove_router(struct tipc_node *n_ptr, u32 router);
113 struct sk_buff *tipc_node_get_links(const void *req_tlv_area, int req_tlv_space);
114 struct sk_buff *tipc_node_get_nodes(const void *req_tlv_area, int req_tlv_space);
116 static inline struct tipc_node *tipc_node_find(u32 addr)
118 if (likely(in_own_cluster(addr)))
119 return tipc_local_nodes[tipc_node(addr)];
120 else if (tipc_addr_domain_valid(addr)) {
121 struct cluster *c_ptr = tipc_cltr_find(addr);
124 return c_ptr->nodes[tipc_node(addr)];
129 static inline struct tipc_node *tipc_node_select(u32 addr, u32 selector)
131 if (likely(in_own_cluster(addr)))
132 return tipc_local_nodes[tipc_node(addr)];
133 return tipc_node_select_next_hop(addr, selector);
136 static inline void tipc_node_lock(struct tipc_node *n_ptr)
138 spin_lock_bh(&n_ptr->lock);
141 static inline void tipc_node_unlock(struct tipc_node *n_ptr)
143 spin_unlock_bh(&n_ptr->lock);