[linux.git] / fs / ocfs2 / dlmglue.h

/* -*- mode: c; c-basic-offset: 8; -*-
 * vim: noexpandtab sw=8 ts=8 sts=0:
 *
 * dlmglue.h
 *
 * description here
 *
 * Copyright (C) 2002, 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 DLMGLUE_H
#define DLMGLUE_H

#include "dcache.h"

#define OCFS2_LVB_VERSION 4

struct ocfs2_meta_lvb {
	__u8         lvb_version;
	__u8         lvb_reserved0;
	__be16       lvb_reserved1;
	__be32       lvb_iclusters;
	__be32       lvb_iuid;
	__be32       lvb_igid;
	__be64       lvb_iatime_packed;
	__be64       lvb_ictime_packed;
	__be64       lvb_imtime_packed;
	__be64       lvb_isize;
	__be16       lvb_imode;
	__be16       lvb_inlink;
	__be32       lvb_iattr;
	__be32       lvb_igeneration;
	__be32       lvb_reserved2;
};

/* ocfs2_meta_lock_full() and ocfs2_data_lock_full() 'arg_flags' flags */
/* don't wait on recovery. */
#define OCFS2_META_LOCK_RECOVERY	(0x01)
/* Instruct the dlm not to queue ourselves on the other node. */
#define OCFS2_META_LOCK_NOQUEUE		(0x02)
/* don't block waiting for the vote thread, instead return -EAGAIN */
#define OCFS2_LOCK_NONBLOCK		(0x04)

int ocfs2_dlm_init(struct ocfs2_super *osb);
void ocfs2_dlm_shutdown(struct ocfs2_super *osb);
void ocfs2_lock_res_init_once(struct ocfs2_lock_res *res);
void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res,
			       enum ocfs2_lock_type type,
			       unsigned int generation,
			       struct inode *inode);
void ocfs2_dentry_lock_res_init(struct ocfs2_dentry_lock *dl,
				u64 parent, struct inode *inode);
void ocfs2_lock_res_free(struct ocfs2_lock_res *res);
int ocfs2_create_new_inode_locks(struct inode *inode);
int ocfs2_drop_inode_locks(struct inode *inode);
int ocfs2_data_lock_full(struct inode *inode,
			 int write,
			 int arg_flags);
#define ocfs2_data_lock(inode, write) ocfs2_data_lock_full(inode, write, 0)
int ocfs2_data_lock_with_page(struct inode *inode,
			      int write,
			      struct page *page);
void ocfs2_data_unlock(struct inode *inode,
		       int write);
int ocfs2_rw_lock(struct inode *inode, int write);
void ocfs2_rw_unlock(struct inode *inode, int write);
int ocfs2_open_lock(struct inode *inode);
int ocfs2_try_open_lock(struct inode *inode, int write);
void ocfs2_open_unlock(struct inode *inode);
int ocfs2_meta_lock_atime(struct inode *inode,
			  struct vfsmount *vfsmnt,
			  int *level);
int ocfs2_meta_lock_full(struct inode *inode,
			 struct buffer_head **ret_bh,
			 int ex,
			 int arg_flags);
int ocfs2_meta_lock_with_page(struct inode *inode,
			      struct buffer_head **ret_bh,
			      int ex,
			      struct page *page);
/* 99% of the time we don't want to supply any additional flags --
 * those are for very specific cases only. */
#define ocfs2_meta_lock(i, b, e) ocfs2_meta_lock_full(i, b, e, 0)
void ocfs2_meta_unlock(struct inode *inode,
		       int ex);
int ocfs2_super_lock(struct ocfs2_super *osb,
		     int ex);
void ocfs2_super_unlock(struct ocfs2_super *osb,
			int ex);
int ocfs2_rename_lock(struct ocfs2_super *osb);
void ocfs2_rename_unlock(struct ocfs2_super *osb);
int ocfs2_dentry_lock(struct dentry *dentry, int ex);
void ocfs2_dentry_unlock(struct dentry *dentry, int ex);

void ocfs2_mark_lockres_freeing(struct ocfs2_lock_res *lockres);
void ocfs2_simple_drop_lockres(struct ocfs2_super *osb,
			       struct ocfs2_lock_res *lockres);

/* for the vote thread */
void ocfs2_process_blocked_lock(struct ocfs2_super *osb,
				struct ocfs2_lock_res *lockres);

struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void);
void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug);

#endif	/* DLMGLUE_H */
Commit	Line	Data
ccd979bd MF	1	/* -- mode: c; c-basic-offset: 8; --
	2	* vim: noexpandtab sw=8 ts=8 sts=0:
	3	*
	4	* dlmglue.h
	5	*
	6	* description here
	7	*
	8	* Copyright (C) 2002, 2004 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; either
	13	* version 2 of the License, or (at your option) any later version.
	14	*
	15	* This program is distributed in the hope that it will be useful,
	16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	18	* General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU General Public
	21	* License along with this program; if not, write to the
	22	* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
	23	* Boston, MA 021110-1307, USA.
	24	*/
	25
	26
	27	#ifndef DLMGLUE_H
	28	#define DLMGLUE_H
	29
d680efe9 MF	30	#include "dcache.h"
d680efe9 MF	31
f9e2d82e	32	#define OCFS2_LVB_VERSION 4
ccd979bd MF	33
ccd979bd MF	34	struct ocfs2_meta_lvb {
4d3b83f7	35	__u8 lvb_version;
24c19ef4 MF	36	__u8 lvb_reserved0;
24c19ef4 MF	37	__be16 lvb_reserved1;
ccd979bd MF	38	__be32 lvb_iclusters;
	39	__be32 lvb_iuid;
	40	__be32 lvb_igid;
	41	__be64 lvb_iatime_packed;
	42	__be64 lvb_ictime_packed;
	43	__be64 lvb_imtime_packed;
	44	__be64 lvb_isize;
	45	__be16 lvb_imode;
	46	__be16 lvb_inlink;
ca4d147e	47	__be32 lvb_iattr;
f9e2d82e MF	48	__be32 lvb_igeneration;
f9e2d82e MF	49	__be32 lvb_reserved2;
ccd979bd MF	50	};
	51
	52	/* ocfs2_meta_lock_full() and ocfs2_data_lock_full() 'arg_flags' flags */
	53	/* don't wait on recovery. */
	54	#define OCFS2_META_LOCK_RECOVERY (0x01)
	55	/* Instruct the dlm not to queue ourselves on the other node. */
	56	#define OCFS2_META_LOCK_NOQUEUE (0x02)
	57	/* don't block waiting for the vote thread, instead return -EAGAIN */
	58	#define OCFS2_LOCK_NONBLOCK (0x04)
	59
	60	int ocfs2_dlm_init(struct ocfs2_super *osb);
	61	void ocfs2_dlm_shutdown(struct ocfs2_super *osb);
	62	void ocfs2_lock_res_init_once(struct ocfs2_lock_res *res);
	63	void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res,
	64	enum ocfs2_lock_type type,
24c19ef4	65	unsigned int generation,
ccd979bd	66	struct inode *inode);
d680efe9 MF	67	void ocfs2_dentry_lock_res_init(struct ocfs2_dentry_lock *dl,
d680efe9 MF	68	u64 parent, struct inode *inode);
ccd979bd MF	69	void ocfs2_lock_res_free(struct ocfs2_lock_res *res);
	70	int ocfs2_create_new_inode_locks(struct inode *inode);
	71	int ocfs2_drop_inode_locks(struct inode *inode);
	72	int ocfs2_data_lock_full(struct inode *inode,
	73	int write,
	74	int arg_flags);
	75	#define ocfs2_data_lock(inode, write) ocfs2_data_lock_full(inode, write, 0)
	76	int ocfs2_data_lock_with_page(struct inode *inode,
	77	int write,
	78	struct page *page);
	79	void ocfs2_data_unlock(struct inode *inode,
	80	int write);
	81	int ocfs2_rw_lock(struct inode *inode, int write);
	82	void ocfs2_rw_unlock(struct inode *inode, int write);
50008630 TY	83	int ocfs2_open_lock(struct inode *inode);
	84	int ocfs2_try_open_lock(struct inode *inode, int write);
	85	void ocfs2_open_unlock(struct inode *inode);
7f1a37e3 TY	86	int ocfs2_meta_lock_atime(struct inode *inode,
	87	struct vfsmount *vfsmnt,
	88	int *level);
ccd979bd	89	int ocfs2_meta_lock_full(struct inode *inode,
ccd979bd MF	90	struct buffer_head **ret_bh,
	91	int ex,
	92	int arg_flags);
	93	int ocfs2_meta_lock_with_page(struct inode *inode,
ccd979bd MF	94	struct buffer_head **ret_bh,
	95	int ex,
	96	struct page *page);
	97	/* 99% of the time we don't want to supply any additional flags --
	98	* those are for very specific cases only. */
4bcec184	99	#define ocfs2_meta_lock(i, b, e) ocfs2_meta_lock_full(i, b, e, 0)
ccd979bd MF	100	void ocfs2_meta_unlock(struct inode *inode,
	101	int ex);
	102	int ocfs2_super_lock(struct ocfs2_super *osb,
	103	int ex);
	104	void ocfs2_super_unlock(struct ocfs2_super *osb,
	105	int ex);
	106	int ocfs2_rename_lock(struct ocfs2_super *osb);
	107	void ocfs2_rename_unlock(struct ocfs2_super *osb);
d680efe9 MF	108	int ocfs2_dentry_lock(struct dentry *dentry, int ex);
	109	void ocfs2_dentry_unlock(struct dentry *dentry, int ex);
	110
ccd979bd	111	void ocfs2_mark_lockres_freeing(struct ocfs2_lock_res *lockres);
d680efe9 MF	112	void ocfs2_simple_drop_lockres(struct ocfs2_super *osb,
d680efe9 MF	113	struct ocfs2_lock_res *lockres);
ccd979bd MF	114
	115	/* for the vote thread */
	116	void ocfs2_process_blocked_lock(struct ocfs2_super *osb,
	117	struct ocfs2_lock_res *lockres);
	118
	119	struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void);
	120	void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug);
	121
ccd979bd	122	#endif /* DLMGLUE_H */