[linux-2.6-block.git] / fs / gfs2 / log.h

/*
 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
 *
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU General Public License version 2.
 */

#ifndef __LOG_DOT_H__
#define __LOG_DOT_H__

#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/writeback.h>
#include "incore.h"
#include "inode.h"

/**
 * gfs2_log_lock - acquire the right to mess with the log manager
 * @sdp: the filesystem
 *
 */

static inline void gfs2_log_lock(struct gfs2_sbd *sdp)
__acquires(&sdp->sd_log_lock)
{
	spin_lock(&sdp->sd_log_lock);
}

/**
 * gfs2_log_unlock - release the right to mess with the log manager
 * @sdp: the filesystem
 *
 */

static inline void gfs2_log_unlock(struct gfs2_sbd *sdp)
__releases(&sdp->sd_log_lock)
{
	spin_unlock(&sdp->sd_log_lock);
}

static inline void gfs2_log_pointers_init(struct gfs2_sbd *sdp,
					  unsigned int value)
{
	if (++value == sdp->sd_jdesc->jd_blocks) {
		value = 0;
	}
	sdp->sd_log_head = sdp->sd_log_tail = value;
}

static inline void gfs2_ordered_add_inode(struct gfs2_inode *ip)
{
	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);

	if (gfs2_is_jdata(ip) || !gfs2_is_ordered(sdp))
		return;

	if (!test_bit(GIF_ORDERED, &ip->i_flags)) {
		spin_lock(&sdp->sd_ordered_lock);
		if (!test_and_set_bit(GIF_ORDERED, &ip->i_flags))
			list_add(&ip->i_ordered, &sdp->sd_log_le_ordered);
		spin_unlock(&sdp->sd_ordered_lock);
	}
}
extern void gfs2_ordered_del_inode(struct gfs2_inode *ip);
extern unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct,
			    unsigned int ssize);

extern void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks);
extern int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks);
extern void gfs2_write_log_header(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd,
				  u64 seq, u32 tail, u32 flags, int op_flags);
extern void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl,
			   u32 type);
extern void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *trans);
extern void gfs2_ail1_flush(struct gfs2_sbd *sdp, struct writeback_control *wbc);

extern void gfs2_log_shutdown(struct gfs2_sbd *sdp);
extern int gfs2_logd(void *data);
extern void gfs2_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd);
extern void gfs2_write_revokes(struct gfs2_sbd *sdp);

#endif /* __LOG_DOT_H__ */
Commit	Line	Data
b3b94faa DT	1	/*
b3b94faa DT	2	* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3a8a9a10	3	* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
b3b94faa DT	4	*
	5	* This copyrighted material is made available to anyone wishing to use,
	6	* modify, copy, or redistribute it subject to the terms and conditions
e9fc2aa0	7	* of the GNU General Public License version 2.
b3b94faa DT	8	*/
	9
	10	#ifndef __LOG_DOT_H__
	11	#define __LOG_DOT_H__
	12
f2f7ba52 SW	13	#include <linux/list.h>
f2f7ba52 SW	14	#include <linux/spinlock.h>
4667a0ec	15	#include <linux/writeback.h>
f2f7ba52	16	#include "incore.h"
845802b1	17	#include "inode.h"
f2f7ba52	18
b3b94faa DT	19	/**
	20	* gfs2_log_lock - acquire the right to mess with the log manager
	21	* @sdp: the filesystem
	22	*
	23	*/
	24
	25	static inline void gfs2_log_lock(struct gfs2_sbd *sdp)
2d81afb8	26	__acquires(&sdp->sd_log_lock)
b3b94faa DT	27	{
	28	spin_lock(&sdp->sd_log_lock);
	29	}
	30
	31	/**
	32	* gfs2_log_unlock - release the right to mess with the log manager
	33	* @sdp: the filesystem
	34	*
	35	*/
	36
	37	static inline void gfs2_log_unlock(struct gfs2_sbd *sdp)
2d81afb8	38	__releases(&sdp->sd_log_lock)
b3b94faa DT	39	{
	40	spin_unlock(&sdp->sd_log_lock);
	41	}
	42
	43	static inline void gfs2_log_pointers_init(struct gfs2_sbd *sdp,
	44	unsigned int value)
	45	{
	46	if (++value == sdp->sd_jdesc->jd_blocks) {
	47	value = 0;
b3b94faa DT	48	}
	49	sdp->sd_log_head = sdp->sd_log_tail = value;
	50	}
	51
45138990 SW	52	static inline void gfs2_ordered_add_inode(struct gfs2_inode *ip)
45138990 SW	53	{
977767a7	54	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
45138990	55
977767a7	56	if (gfs2_is_jdata(ip) \|\| !gfs2_is_ordered(sdp))
845802b1 AG	57	return;
845802b1 AG	58
45138990 SW	59	if (!test_bit(GIF_ORDERED, &ip->i_flags)) {
	60	spin_lock(&sdp->sd_ordered_lock);
	61	if (!test_and_set_bit(GIF_ORDERED, &ip->i_flags))
	62	list_add(&ip->i_ordered, &sdp->sd_log_le_ordered);
	63	spin_unlock(&sdp->sd_ordered_lock);
	64	}
	65	}
	66	extern void gfs2_ordered_del_inode(struct gfs2_inode *ip);
ed4878e8	67	extern unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct,
b3b94faa DT	68	unsigned int ssize);
b3b94faa DT	69
24972557	70	extern void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks);
ed4878e8	71	extern int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks);
c1696fb8 BP	72	extern void gfs2_write_log_header(struct gfs2_sbd sdp, struct gfs2_jdesc jd,
c1696fb8 BP	73	u64 seq, u32 tail, u32 flags, int op_flags);
24972557	74	extern void gfs2_log_flush(struct gfs2_sbd sdp, struct gfs2_glock gl,
c1696fb8	75	u32 type);
ed4878e8	76	extern void gfs2_log_commit(struct gfs2_sbd sdp, struct gfs2_trans trans);
4667a0ec	77	extern void gfs2_ail1_flush(struct gfs2_sbd sdp, struct writeback_control wbc);
2bcd610d	78
ed4878e8	79	extern void gfs2_log_shutdown(struct gfs2_sbd *sdp);
ed4878e8	80	extern int gfs2_logd(void *data);
5d054964 BM	81	extern void gfs2_add_revoke(struct gfs2_sbd sdp, struct gfs2_bufdata bd);
5d054964 BM	82	extern void gfs2_write_revokes(struct gfs2_sbd *sdp);
b3b94faa DT	83
b3b94faa DT	84	#endif /* __LOG_DOT_H__ */