[mirror_ubuntu-jammy-kernel.git] / fs / ocfs2 / cluster / nodemanager.h

/* SPDX-License-Identifier: GPL-2.0-or-later */
/* -*- 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.
 */

#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 */
Commit	Line	Data
328970de	1	/* SPDX-License-Identifier: GPL-2.0-or-later */
0c83ed8e KH	2	/* -- mode: c; c-basic-offset: 8; --
	3	* vim: noexpandtab sw=8 ts=8 sts=0:
	4	*
	5	* nodemanager.h
	6	*
	7	* Function prototypes
	8	*
	9	* Copyright (C) 2004 Oracle. All rights reserved.
0c83ed8e KH	10	*/
	11
	12	#ifndef O2CLUSTER_NODEMANAGER_H
	13	#define O2CLUSTER_NODEMANAGER_H
	14
	15	#include "ocfs2_nodemanager.h"
	16
	17	/* This totally doesn't belong here. */
	18	#include <linux/configfs.h>
	19	#include <linux/rbtree.h>
	20
f6656d26 SM	21	enum o2nm_fence_method {
	22	O2NM_FENCE_RESET = 0,
	23	O2NM_FENCE_PANIC,
	24	O2NM_FENCE_METHODS, /* Number of fence methods */
	25	};
	26
0c83ed8e KH	27	struct o2nm_node {
	28	spinlock_t nd_lock;
	29	struct config_item nd_item;
	30	char nd_name[O2NM_MAX_NAME_LEN+1]; /* replace? */
	31	__u8 nd_num;
	32	/* only one address per node, as attributes, for now. */
	33	__be32 nd_ipv4_address;
	34	__be16 nd_ipv4_port;
	35	struct rb_node nd_ip_node;
	36	/* there can be only one local node for now */
	37	int nd_local;
	38
	39	unsigned long nd_set_attributes;
	40	};
	41
296b75ed AB	42	struct o2nm_cluster {
	43	struct config_group cl_group;
	44	unsigned cl_has_local:1;
	45	u8 cl_local_node;
	46	rwlock_t cl_nodes_lock;
	47	struct o2nm_node *cl_nodes[O2NM_MAX_NODES];
	48	struct rb_root cl_node_ip_tree;
b5dd8030 JM	49	unsigned int cl_idle_timeout_ms;
	50	unsigned int cl_keepalive_delay_ms;
	51	unsigned int cl_reconnect_delay_ms;
f6656d26	52	enum o2nm_fence_method cl_fence_method;
296b75ed AB	53
	54	/* this bitmap is part of a hack for disk bitmap.. will go eventually. - zab */
	55	unsigned long cl_nodes_bitmap[BITS_TO_LONGS(O2NM_MAX_NODES)];
	56	};
	57
	58	extern struct o2nm_cluster *o2nm_single_cluster;
	59
0c83ed8e KH	60	u8 o2nm_this_node(void);
	61
	62	int o2nm_configured_node_map(unsigned long *map, unsigned bytes);
	63	struct o2nm_node *o2nm_get_node_by_num(u8 node_num);
	64	struct o2nm_node *o2nm_get_node_by_ip(__be32 addr);
	65	void o2nm_node_get(struct o2nm_node *node);
	66	void o2nm_node_put(struct o2nm_node *node);
	67
14829422 JB	68	int o2nm_depend_item(struct config_item *item);
14829422 JB	69	void o2nm_undepend_item(struct config_item *item);
16c6a4f2 JB	70	int o2nm_depend_this_node(void);
16c6a4f2 JB	71	void o2nm_undepend_this_node(void);
14829422	72
0c83ed8e	73	#endif /* O2CLUSTER_NODEMANAGER_H */