/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * nodemanager.h
 *
 * Function prototypes
 *
 * Copyright (C) 2004 Oracle.  All rights reserved.
 */

#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 */