[deliverable/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 3

struct ocfs2_meta_lvb {
	__be32       lvb_version;
	__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_reserved[2];
};

/* 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,
			       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_create_new_lock(struct ocfs2_super *osb,
			  struct ocfs2_lock_res *lockres, int ex);
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_meta_lock_full(struct inode *inode,
			 struct ocfs2_journal_handle *handle,
			 struct buffer_head **ret_bh,
			 int ex,
			 int arg_flags);
int ocfs2_meta_lock_with_page(struct inode *inode,
			      struct ocfs2_journal_handle *handle,
			      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, h, b, e) ocfs2_meta_lock_full(i, h, 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);

/* aids in debugging and tracking lvbs */
void ocfs2_dump_meta_lvb_info(u64 level,
			      const char *function,
			      unsigned int line,
			      struct ocfs2_lock_res *lockres);
#define mlog_meta_lvb(__level, __lockres) ocfs2_dump_meta_lvb_info(__level, __PRETTY_FUNCTION__, __LINE__, __lockres)

#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
ca4d147e	32	#define OCFS2_LVB_VERSION 3
ccd979bd MF	33
	34	struct ocfs2_meta_lvb {
	35	__be32 lvb_version;
	36	__be32 lvb_iclusters;
	37	__be32 lvb_iuid;
	38	__be32 lvb_igid;
	39	__be64 lvb_iatime_packed;
	40	__be64 lvb_ictime_packed;
	41	__be64 lvb_imtime_packed;
	42	__be64 lvb_isize;
	43	__be16 lvb_imode;
	44	__be16 lvb_inlink;
ca4d147e HP	45	__be32 lvb_iattr;
ca4d147e HP	46	__be32 lvb_reserved[2];
ccd979bd MF	47	};
	48
	49	/* ocfs2_meta_lock_full() and ocfs2_data_lock_full() 'arg_flags' flags */
	50	/* don't wait on recovery. */
	51	#define OCFS2_META_LOCK_RECOVERY (0x01)
	52	/* Instruct the dlm not to queue ourselves on the other node. */
	53	#define OCFS2_META_LOCK_NOQUEUE (0x02)
	54	/* don't block waiting for the vote thread, instead return -EAGAIN */
	55	#define OCFS2_LOCK_NONBLOCK (0x04)
	56
	57	int ocfs2_dlm_init(struct ocfs2_super *osb);
	58	void ocfs2_dlm_shutdown(struct ocfs2_super *osb);
	59	void ocfs2_lock_res_init_once(struct ocfs2_lock_res *res);
	60	void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res,
	61	enum ocfs2_lock_type type,
	62	struct inode *inode);
d680efe9 MF	63	void ocfs2_dentry_lock_res_init(struct ocfs2_dentry_lock *dl,
d680efe9 MF	64	u64 parent, struct inode *inode);
ccd979bd MF	65	void ocfs2_lock_res_free(struct ocfs2_lock_res *res);
ccd979bd MF	66	int ocfs2_create_new_inode_locks(struct inode *inode);
d680efe9 MF	67	int ocfs2_create_new_lock(struct ocfs2_super *osb,
d680efe9 MF	68	struct ocfs2_lock_res *lockres, int ex);
ccd979bd MF	69	int ocfs2_drop_inode_locks(struct inode *inode);
	70	int ocfs2_data_lock_full(struct inode *inode,
	71	int write,
	72	int arg_flags);
	73	#define ocfs2_data_lock(inode, write) ocfs2_data_lock_full(inode, write, 0)
	74	int ocfs2_data_lock_with_page(struct inode *inode,
	75	int write,
	76	struct page *page);
	77	void ocfs2_data_unlock(struct inode *inode,
	78	int write);
	79	int ocfs2_rw_lock(struct inode *inode, int write);
	80	void ocfs2_rw_unlock(struct inode *inode, int write);
	81	int ocfs2_meta_lock_full(struct inode *inode,
	82	struct ocfs2_journal_handle *handle,
	83	struct buffer_head **ret_bh,
	84	int ex,
	85	int arg_flags);
	86	int ocfs2_meta_lock_with_page(struct inode *inode,
	87	struct ocfs2_journal_handle *handle,
	88	struct buffer_head **ret_bh,
	89	int ex,
	90	struct page *page);
	91	/* 99% of the time we don't want to supply any additional flags --
	92	* those are for very specific cases only. */
	93	#define ocfs2_meta_lock(i, h, b, e) ocfs2_meta_lock_full(i, h, b, e, 0)
	94	void ocfs2_meta_unlock(struct inode *inode,
	95	int ex);
	96	int ocfs2_super_lock(struct ocfs2_super *osb,
	97	int ex);
	98	void ocfs2_super_unlock(struct ocfs2_super *osb,
	99	int ex);
	100	int ocfs2_rename_lock(struct ocfs2_super *osb);
	101	void ocfs2_rename_unlock(struct ocfs2_super *osb);
d680efe9 MF	102	int ocfs2_dentry_lock(struct dentry *dentry, int ex);
	103	void ocfs2_dentry_unlock(struct dentry *dentry, int ex);
	104
ccd979bd	105	void ocfs2_mark_lockres_freeing(struct ocfs2_lock_res *lockres);
d680efe9 MF	106	void ocfs2_simple_drop_lockres(struct ocfs2_super *osb,
d680efe9 MF	107	struct ocfs2_lock_res *lockres);
ccd979bd MF	108
	109	/* for the vote thread */
	110	void ocfs2_process_blocked_lock(struct ocfs2_super *osb,
	111	struct ocfs2_lock_res *lockres);
	112
	113	struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void);
	114	void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug);
	115
	116	/* aids in debugging and tracking lvbs */
	117	void ocfs2_dump_meta_lvb_info(u64 level,
	118	const char *function,
	119	unsigned int line,
	120	struct ocfs2_lock_res *lockres);
	121	#define mlog_meta_lvb(__level, __lockres) ocfs2_dump_meta_lvb_info(__level, __PRETTY_FUNCTION__, __LINE__, __lockres)
	122
	123	#endif /* DLMGLUE_H */