[mirror_ubuntu-artful-kernel.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"

/**
 * 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 (!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);
enum gfs2_flush_type {
	NORMAL_FLUSH = 0,
	SYNC_FLUSH,
	SHUTDOWN_FLUSH,
	FREEZE_FLUSH
};
extern void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl,
			   enum gfs2_flush_type type);
extern void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *trans);
extern void gfs2_remove_from_ail(struct gfs2_bufdata *bd);
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 SW	16	#include "incore.h"
f2f7ba52 SW	17
b3b94faa DT	18	/**
	19	* gfs2_log_lock - acquire the right to mess with the log manager
	20	* @sdp: the filesystem
	21	*
	22	*/
	23
	24	static inline void gfs2_log_lock(struct gfs2_sbd *sdp)
2d81afb8	25	__acquires(&sdp->sd_log_lock)
b3b94faa DT	26	{
	27	spin_lock(&sdp->sd_log_lock);
	28	}
	29
	30	/**
	31	* gfs2_log_unlock - release the right to mess with the log manager
	32	* @sdp: the filesystem
	33	*
	34	*/
	35
	36	static inline void gfs2_log_unlock(struct gfs2_sbd *sdp)
2d81afb8	37	__releases(&sdp->sd_log_lock)
b3b94faa DT	38	{
	39	spin_unlock(&sdp->sd_log_lock);
	40	}
	41
	42	static inline void gfs2_log_pointers_init(struct gfs2_sbd *sdp,
	43	unsigned int value)
	44	{
	45	if (++value == sdp->sd_jdesc->jd_blocks) {
	46	value = 0;
b3b94faa DT	47	}
	48	sdp->sd_log_head = sdp->sd_log_tail = value;
	49	}
	50
45138990 SW	51	static inline void gfs2_ordered_add_inode(struct gfs2_inode *ip)
	52	{
	53	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
	54
	55	if (!test_bit(GIF_ORDERED, &ip->i_flags)) {
	56	spin_lock(&sdp->sd_ordered_lock);
	57	if (!test_and_set_bit(GIF_ORDERED, &ip->i_flags))
	58	list_add(&ip->i_ordered, &sdp->sd_log_le_ordered);
	59	spin_unlock(&sdp->sd_ordered_lock);
	60	}
	61	}
	62	extern void gfs2_ordered_del_inode(struct gfs2_inode *ip);
ed4878e8	63	extern unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct,
b3b94faa DT	64	unsigned int ssize);
b3b94faa DT	65
24972557	66	extern void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks);
ed4878e8	67	extern int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks);
24972557 BM	68	enum gfs2_flush_type {
	69	NORMAL_FLUSH = 0,
	70	SYNC_FLUSH,
	71	SHUTDOWN_FLUSH,
	72	FREEZE_FLUSH
	73	};
	74	extern void gfs2_log_flush(struct gfs2_sbd sdp, struct gfs2_glock gl,
	75	enum gfs2_flush_type type);
ed4878e8 BP	76	extern void gfs2_log_commit(struct gfs2_sbd sdp, struct gfs2_trans trans);
ed4878e8 BP	77	extern void gfs2_remove_from_ail(struct gfs2_bufdata *bd);
4667a0ec	78	extern void gfs2_ail1_flush(struct gfs2_sbd sdp, struct writeback_control wbc);
2bcd610d	79
ed4878e8	80	extern void gfs2_log_shutdown(struct gfs2_sbd *sdp);
ed4878e8	81	extern int gfs2_logd(void *data);
5d054964 BM	82	extern void gfs2_add_revoke(struct gfs2_sbd sdp, struct gfs2_bufdata bd);
5d054964 BM	83	extern void gfs2_write_revokes(struct gfs2_sbd *sdp);
b3b94faa DT	84
b3b94faa DT	85	#endif /* __LOG_DOT_H__ */