node.h

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/*
 * 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 {
    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 {
        u8 supportable;
        u8 supported;
        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 *defragm;
    } 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