/* * net/tipc/node.h: Include file for TIPC node management routines * * Copyright (c) 2000-2006, Ericsson AB * Copyright (c) 2005, 2010-2011, Wind River Systems * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright *    notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright *    notice, this list of conditions and the following disclaimer in the *    documentation and/or other materials provided with the distribution. * 3. Neither the names of the copyright holders nor the names of its *    contributors may be used to endorse or promote products derived from *    this software without specific prior written permission. * * Alternatively, this software may be distributed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #ifndef _TIPC_NODE_H#define _TIPC_NODE_H #include "node_subscr.h"#include "addr.h"#include "net.h"#include "bearer.h" /* * Out-of-range value for node signature */#define INVALID_NODE_SIG 0x10000 /* Flags used to block (re)establishment of contact with a neighboring node */#define WAIT_PEER_DOWN	0x0001	/* wait to see that peer's links are down */#define WAIT_NAMES_GONE	0x0002	/* wait for peer's publications to be purged */#define WAIT_NODE_DOWN	0x0004	/* wait until peer node is declared down */ /** * struct tipc_node - TIPC node structure * @addr: network address of node * @lock: spinlock governing access to structure * @hash: links to adjacent nodes in unsorted hash chain * @list: links to adjacent nodes in sorted list of cluster's nodes * @nsub: list of "node down" subscriptions monitoring node * @active_links: pointers to active links to node * @links: pointers to all links to node * @working_links: number of working links to node (both active and standby) * @block_setup: bit mask of conditions preventing link establishment to node * @link_cnt: number of links to node * @permit_changeover: non-zero if node has redundant links to this system * @signature: node instance identifier * @bclink: broadcast-related info *    @acked: sequence # of last outbound b'cast message acknowledged by node *    @last_in: sequence # of last in-sequence b'cast message received from node *    @last_sent: sequence # of last b'cast message sent by node *    @oos_state: state tracker for handling OOS b'cast messages *    @deferred_size: number of OOS b'cast messages in deferred queue *    @deferred_head: oldest OOS b'cast message received from node *    @deferred_tail: newest OOS b'cast message received from node *    @reasm_head: broadcast reassembly queue head from node *    @reasm_tail: last broadcast fragment received from node *    @recv_permitted: true if node is allowed to receive b'cast messages */struct tipc_node {	u32 addr;	spinlock_t lock;	struct hlist_node hash;	struct list_head list;	struct list_head nsub;	struct tipc_link *active_links[2];	struct tipc_link *links[MAX_BEARERS];	int link_cnt;	int working_links;	int block_setup;	int permit_changeover;	u32 signature;	struct {		u32 acked;		u32 last_in;		u32 last_sent;		u32 oos_state;		u32 deferred_size;		struct sk_buff *deferred_head;		struct sk_buff *deferred_tail;		struct sk_buff *reasm_head;		struct sk_buff *reasm_tail;		bool recv_permitted;	} bclink;}; extern struct list_head tipc_node_list; struct tipc_node *tipc_node_find(u32 addr);struct tipc_node *tipc_node_create(u32 addr);void tipc_node_delete(struct tipc_node *n_ptr);void tipc_node_attach_link(struct tipc_node *n_ptr, struct tipc_link *l_ptr);void tipc_node_detach_link(struct tipc_node *n_ptr, struct tipc_link *l_ptr);void tipc_node_link_down(struct tipc_node *n_ptr, struct tipc_link *l_ptr);void tipc_node_link_up(struct tipc_node *n_ptr, struct tipc_link *l_ptr);int tipc_node_active_links(struct tipc_node *n_ptr);int tipc_node_redundant_links(struct tipc_node *n_ptr);int tipc_node_is_up(struct tipc_node *n_ptr);struct sk_buff *tipc_node_get_links(const void *req_tlv_area, int req_tlv_space);struct sk_buff *tipc_node_get_nodes(const void *req_tlv_area, int req_tlv_space); static inline void tipc_node_lock(struct tipc_node *n_ptr){	spin_lock_bh(&n_ptr->lock);} static inline void tipc_node_unlock(struct tipc_node *n_ptr){	spin_unlock_bh(&n_ptr->lock);} #endif