593a5f22d8
Updated copyright notice to include the year the file was actually created. Information about file creation dates was extracted from the files in the old CVS repository at tipc.sourceforge.net. Signed-off-by: Per Liden <per.liden@nospam.ericsson.com>
145 lines
5.2 KiB
C
145 lines
5.2 KiB
C
/*
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* net/tipc/node.h: Include file for TIPC node management routines
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*
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* Copyright (c) 2000-2006, Ericsson AB
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* Copyright (c) 2005, Wind River Systems
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the names of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _TIPC_NODE_H
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#define _TIPC_NODE_H
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#include "node_subscr.h"
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#include "addr.h"
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#include "cluster.h"
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#include "bearer.h"
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/**
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* struct node - TIPC node structure
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* @addr: network address of node
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* @lock: spinlock governing access to structure
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* @owner: pointer to cluster that node belongs to
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* @next: pointer to next node in sorted list of cluster's nodes
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* @nsub: list of "node down" subscriptions monitoring node
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* @active_links: pointers to active links to node
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* @links: pointers to all links to node
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* @link_cnt: number of links to node
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* @permit_changeover: non-zero if node has redundant links to this system
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* @routers: bitmap (used for multicluster communication)
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* @last_router: (used for multicluster communication)
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* @bclink: broadcast-related info
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* @supported: non-zero if node supports TIPC b'cast capability
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* @acked: sequence # of last outbound b'cast message acknowledged by node
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* @last_in: sequence # of last in-sequence b'cast message received from node
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* @gap_after: sequence # of last message not requiring a NAK request
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* @gap_to: sequence # of last message requiring a NAK request
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* @nack_sync: counter that determines when NAK requests should be sent
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* @deferred_head: oldest OOS b'cast message received from node
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* @deferred_tail: newest OOS b'cast message received from node
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* @defragm: list of partially reassembled b'cast message fragments from node
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*/
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struct node {
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u32 addr;
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spinlock_t lock;
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struct cluster *owner;
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struct node *next;
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struct list_head nsub;
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struct link *active_links[2];
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struct link *links[MAX_BEARERS];
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int link_cnt;
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int permit_changeover;
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u32 routers[512/32];
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int last_router;
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struct {
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int supported;
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u32 acked;
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u32 last_in;
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u32 gap_after;
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u32 gap_to;
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u32 nack_sync;
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struct sk_buff *deferred_head;
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struct sk_buff *deferred_tail;
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struct sk_buff *defragm;
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} bclink;
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};
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extern struct node *nodes;
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extern u32 tipc_own_tag;
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struct node *node_create(u32 addr);
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void node_delete(struct node *n_ptr);
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struct node *node_attach_link(struct link *l_ptr);
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void node_detach_link(struct node *n_ptr, struct link *l_ptr);
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void node_link_down(struct node *n_ptr, struct link *l_ptr);
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void node_link_up(struct node *n_ptr, struct link *l_ptr);
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int node_has_active_links(struct node *n_ptr);
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int node_has_redundant_links(struct node *n_ptr);
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u32 node_select_router(struct node *n_ptr, u32 ref);
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struct node *node_select_next_hop(u32 addr, u32 selector);
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int node_is_up(struct node *n_ptr);
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void node_add_router(struct node *n_ptr, u32 router);
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void node_remove_router(struct node *n_ptr, u32 router);
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struct sk_buff *node_get_links(const void *req_tlv_area, int req_tlv_space);
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struct sk_buff *node_get_nodes(const void *req_tlv_area, int req_tlv_space);
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static inline struct node *node_find(u32 addr)
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{
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if (likely(in_own_cluster(addr)))
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return local_nodes[tipc_node(addr)];
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else if (addr_domain_valid(addr)) {
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struct cluster *c_ptr = cluster_find(addr);
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if (c_ptr)
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return c_ptr->nodes[tipc_node(addr)];
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}
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return 0;
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}
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static inline struct node *node_select(u32 addr, u32 selector)
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{
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if (likely(in_own_cluster(addr)))
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return local_nodes[tipc_node(addr)];
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return node_select_next_hop(addr, selector);
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}
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static inline void node_lock(struct node *n_ptr)
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{
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spin_lock_bh(&n_ptr->lock);
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}
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static inline void node_unlock(struct node *n_ptr)
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{
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spin_unlock_bh(&n_ptr->lock);
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}
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#endif
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