[mirror_ubuntu-bionic-kernel.git] / fs / ocfs2 / stackglue.h

/* -*- mode: c; c-basic-offset: 8; -*-
 * vim: noexpandtab sw=8 ts=8 sts=0:
 *
 * stackglue.h
 *
 * Glue to the underlying cluster stack.
 *
 * Copyright (C) 2007 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, version 2.
 *
 * 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.
 */


#ifndef STACKGLUE_H
#define STACKGLUE_H

#include <linux/types.h>
#include <linux/list.h>
#include <linux/dlmconstants.h>

/*
 * dlmconstants.h does not have a LOCAL flag.  We hope to remove it
 * some day, but right now we need it.  Let's fake it.  This value is larger
 * than any flag in dlmconstants.h.
 */
#define DLM_LKF_LOCAL		0x00100000

/*
 * This shadows DLM_LOCKSPACE_LEN in fs/dlm/dlm_internal.h.  That probably
 * wants to be in a public header.
 */
#define GROUP_NAME_MAX		64


#include "dlm/dlmapi.h"

struct ocfs2_protocol_version {
	u8 pv_major;
	u8 pv_minor;
};

struct ocfs2_locking_protocol {
	struct ocfs2_protocol_version lp_max_version;
	void (*lp_lock_ast)(void *astarg);
	void (*lp_blocking_ast)(void *astarg, int level);
	void (*lp_unlock_ast)(void *astarg, int error);
};

union ocfs2_dlm_lksb {
	struct dlm_lockstatus lksb_o2dlm;
};

struct ocfs2_cluster_connection {
	char cc_name[GROUP_NAME_MAX];
	int cc_namelen;
	struct ocfs2_protocol_version cc_version;
	void (*cc_recovery_handler)(int node_num, void *recovery_data);
	void *cc_recovery_data;
	void *cc_lockspace;
	void *cc_private;
};

int ocfs2_cluster_connect(const char *group,
			  int grouplen,
			  void (*recovery_handler)(int node_num,
						   void *recovery_data),
			  void *recovery_data,
			  struct ocfs2_cluster_connection **conn);
int ocfs2_cluster_disconnect(struct ocfs2_cluster_connection *conn);
void ocfs2_cluster_hangup(const char *group, int grouplen);
int ocfs2_cluster_this_node(unsigned int *node);

int ocfs2_dlm_lock(struct ocfs2_cluster_connection *conn,
		   int mode,
		   union ocfs2_dlm_lksb *lksb,
		   u32 flags,
		   void *name,
		   unsigned int namelen,
		   void *astarg);
int ocfs2_dlm_unlock(struct ocfs2_cluster_connection *conn,
		     union ocfs2_dlm_lksb *lksb,
		     u32 flags,
		     void *astarg);

int ocfs2_dlm_lock_status(union ocfs2_dlm_lksb *lksb);
void *ocfs2_dlm_lvb(union ocfs2_dlm_lksb *lksb);

void o2cb_get_stack(struct ocfs2_locking_protocol *proto);
void o2cb_put_stack(void);

#endif  /* STACKGLUE_H */
Commit	Line	Data
24ef1815 JB	1	/* -- mode: c; c-basic-offset: 8; --
	2	* vim: noexpandtab sw=8 ts=8 sts=0:
	3	*
	4	* stackglue.h
	5	*
	6	* Glue to the underlying cluster stack.
	7	*
	8	* Copyright (C) 2007 Oracle. All rights reserved.
	9	*
	10	* This program is free software; you can redistribute it and/or
	11	* modify it under the terms of the GNU General Public
	12	* License as published by the Free Software Foundation, version 2.
	13	*
	14	* This program is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	17	* General Public License for more details.
	18	*/
	19
	20
	21	#ifndef STACKGLUE_H
	22	#define STACKGLUE_H
	23
bd3e7610 JB	24	#include <linux/types.h>
	25	#include <linux/list.h>
	26	#include <linux/dlmconstants.h>
	27
	28	/*
	29	* dlmconstants.h does not have a LOCAL flag. We hope to remove it
	30	* some day, but right now we need it. Let's fake it. This value is larger
	31	* than any flag in dlmconstants.h.
	32	*/
	33	#define DLM_LKF_LOCAL 0x00100000
	34
4670c46d JB	35	/*
	36	* This shadows DLM_LOCKSPACE_LEN in fs/dlm/dlm_internal.h. That probably
	37	* wants to be in a public header.
	38	*/
	39	#define GROUP_NAME_MAX 64
	40
	41
bd3e7610 JB	42	#include "dlm/dlmapi.h"
bd3e7610 JB	43
4670c46d JB	44	struct ocfs2_protocol_version {
	45	u8 pv_major;
	46	u8 pv_minor;
	47	};
	48
24ef1815	49	struct ocfs2_locking_protocol {
4670c46d	50	struct ocfs2_protocol_version lp_max_version;
24ef1815 JB	51	void (lp_lock_ast)(void astarg);
24ef1815 JB	52	void (lp_blocking_ast)(void astarg, int level);
7431cd7e	53	void (lp_unlock_ast)(void astarg, int error);
24ef1815 JB	54	};
24ef1815 JB	55
8f2c9c1b JB	56	union ocfs2_dlm_lksb {
	57	struct dlm_lockstatus lksb_o2dlm;
	58	};
	59
4670c46d JB	60	struct ocfs2_cluster_connection {
	61	char cc_name[GROUP_NAME_MAX];
	62	int cc_namelen;
	63	struct ocfs2_protocol_version cc_version;
	64	void (cc_recovery_handler)(int node_num, void recovery_data);
	65	void *cc_recovery_data;
	66	void *cc_lockspace;
	67	void *cc_private;
	68	};
	69
	70	int ocfs2_cluster_connect(const char *group,
	71	int grouplen,
	72	void (*recovery_handler)(int node_num,
	73	void *recovery_data),
	74	void *recovery_data,
	75	struct ocfs2_cluster_connection **conn);
	76	int ocfs2_cluster_disconnect(struct ocfs2_cluster_connection *conn);
6953b4c0	77	void ocfs2_cluster_hangup(const char *group, int grouplen);
19fdb624	78	int ocfs2_cluster_this_node(unsigned int *node);
4670c46d JB	79
4670c46d JB	80	int ocfs2_dlm_lock(struct ocfs2_cluster_connection *conn,
24ef1815	81	int mode,
8f2c9c1b	82	union ocfs2_dlm_lksb *lksb,
24ef1815 JB	83	u32 flags,
	84	void *name,
	85	unsigned int namelen,
	86	void *astarg);
4670c46d	87	int ocfs2_dlm_unlock(struct ocfs2_cluster_connection *conn,
8f2c9c1b	88	union ocfs2_dlm_lksb *lksb,
24ef1815 JB	89	u32 flags,
	90	void *astarg);
	91
8f2c9c1b JB	92	int ocfs2_dlm_lock_status(union ocfs2_dlm_lksb *lksb);
	93	void ocfs2_dlm_lvb(union ocfs2_dlm_lksb lksb);
	94
24ef1815 JB	95	void o2cb_get_stack(struct ocfs2_locking_protocol *proto);
	96	void o2cb_put_stack(void);
	97
	98	#endif /* STACKGLUE_H */