nodemanager.h

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/* -*- mode: c; c-basic-offset: 8; -*-
 * vim: noexpandtab sw=8 ts=8 sts=0:
 *
 * nodemanager.h
 *
 * Function prototypes
 *
 * Copyright (C) 2004 Oracle.  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 021110-1307, USA.
 *
 */

#ifndef O2CLUSTER_NODEMANAGER_H
#define O2CLUSTER_NODEMANAGER_H

#include "ocfs2_nodemanager.h"

/* This totally doesn't belong here. */
#include <linux/configfs.h>
#include <linux/rbtree.h>

enum o2nm_fence_method {
    O2NM_FENCE_RESET    = 0,
    O2NM_FENCE_PANIC,
    O2NM_FENCE_METHODS, /* Number of fence methods */
};

struct o2nm_node {
    spinlock_t      nd_lock;
    struct config_item  nd_item;
    char            nd_name[O2NM_MAX_NAME_LEN+1]; /* replace? */
    __u8            nd_num;
    /* only one address per node, as attributes, for now. */
    __be32          nd_ipv4_address;
    __be16          nd_ipv4_port;
    struct rb_node      nd_ip_node;
    /* there can be only one local node for now */
    int         nd_local;

    unsigned long       nd_set_attributes;
};

struct o2nm_cluster {
    struct config_group cl_group;
    unsigned        cl_has_local:1;
    u8          cl_local_node;
    rwlock_t        cl_nodes_lock;
    struct o2nm_node    *cl_nodes[O2NM_MAX_NODES];
    struct rb_root      cl_node_ip_tree;
    unsigned int        cl_idle_timeout_ms;
    unsigned int        cl_keepalive_delay_ms;
    unsigned int        cl_reconnect_delay_ms;
    enum o2nm_fence_method  cl_fence_method;

    /* this bitmap is part of a hack for disk bitmap.. will go eventually. - zab */
    unsigned long   cl_nodes_bitmap[BITS_TO_LONGS(O2NM_MAX_NODES)];
};

extern struct o2nm_cluster *o2nm_single_cluster;

u8 o2nm_this_node(void);

int o2nm_configured_node_map(unsigned long *map, unsigned bytes);
struct o2nm_node *o2nm_get_node_by_num(u8 node_num);
struct o2nm_node *o2nm_get_node_by_ip(__be32 addr);
void o2nm_node_get(struct o2nm_node *node);
void o2nm_node_put(struct o2nm_node *node);

int o2nm_depend_item(struct config_item *item);
void o2nm_undepend_item(struct config_item *item);
int o2nm_depend_this_node(void);
void o2nm_undepend_this_node(void);

#endif /* O2CLUSTER_NODEMANAGER_H */