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

/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
 */

#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"

/*
 * The minimum amount of log space required for a log flush is one block for
 * revokes and one block for the log header.  Log flushes other than
 * GFS2_LOG_HEAD_FLUSH_NORMAL may write one or two more log headers.
 */
#define GFS2_LOG_FLUSH_MIN_BLOCKS 4

/**
 * 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_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 (list_empty(&ip->i_ordered)) {
		spin_lock(&sdp->sd_ordered_lock);
		if (list_empty(&ip->i_ordered))
			list_add(&ip->i_ordered, &sdp->sd_log_ordered);
		spin_unlock(&sdp->sd_ordered_lock);
	}
}

void gfs2_ordered_del_inode(struct gfs2_inode *ip);
unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct);
void gfs2_remove_from_ail(struct gfs2_bufdata *bd);
bool gfs2_log_is_empty(struct gfs2_sbd *sdp);
void gfs2_log_release_revokes(struct gfs2_sbd *sdp, unsigned int revokes);
void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks);
bool gfs2_log_try_reserve(struct gfs2_sbd *sdp, struct gfs2_trans *tr,
			  unsigned int *extra_revokes);
void gfs2_log_reserve(struct gfs2_sbd *sdp, struct gfs2_trans *tr,
		      unsigned int *extra_revokes);
void gfs2_write_log_header(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd,
			   u64 seq, u32 tail, u32 lblock, u32 flags,
			   blk_opf_t op_flags);
void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl,
		    u32 type);
void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *trans);
void gfs2_ail1_flush(struct gfs2_sbd *sdp, struct writeback_control *wbc);
void log_flush_wait(struct gfs2_sbd *sdp);

int gfs2_logd(void *data);
void gfs2_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd);
void gfs2_glock_remove_revoke(struct gfs2_glock *gl);
void gfs2_flush_revokes(struct gfs2_sbd *sdp);
void gfs2_ail_drain(struct gfs2_sbd *sdp);

#endif /* __LOG_DOT_H__ */
Commit	Line	Data
7336d0e6	1	/* SPDX-License-Identifier: GPL-2.0-only */
b3b94faa DT	2	/*
b3b94faa DT	3	* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3a8a9a10	4	* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
b3b94faa DT	5	*/
	6
	7	#ifndef __LOG_DOT_H__
	8	#define __LOG_DOT_H__
	9
f2f7ba52 SW	10	#include <linux/list.h>
f2f7ba52 SW	11	#include <linux/spinlock.h>
4667a0ec	12	#include <linux/writeback.h>
f2f7ba52	13	#include "incore.h"
845802b1	14	#include "inode.h"
f2f7ba52	15
fe3e3976 AG	16	/*
	17	* The minimum amount of log space required for a log flush is one block for
	18	* revokes and one block for the log header. Log flushes other than
	19	* GFS2_LOG_HEAD_FLUSH_NORMAL may write one or two more log headers.
	20	*/
	21	#define GFS2_LOG_FLUSH_MIN_BLOCKS 4
	22
b3b94faa DT	23	/**
	24	* gfs2_log_lock - acquire the right to mess with the log manager
	25	* @sdp: the filesystem
	26	*
	27	*/
	28
	29	static inline void gfs2_log_lock(struct gfs2_sbd *sdp)
2d81afb8	30	__acquires(&sdp->sd_log_lock)
b3b94faa DT	31	{
	32	spin_lock(&sdp->sd_log_lock);
	33	}
	34
	35	/**
	36	* gfs2_log_unlock - release the right to mess with the log manager
	37	* @sdp: the filesystem
	38	*
	39	*/
	40
	41	static inline void gfs2_log_unlock(struct gfs2_sbd *sdp)
2d81afb8	42	__releases(&sdp->sd_log_lock)
b3b94faa DT	43	{
	44	spin_unlock(&sdp->sd_log_lock);
	45	}
	46
45138990 SW	47	static inline void gfs2_ordered_add_inode(struct gfs2_inode *ip)
45138990 SW	48	{
977767a7	49	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
45138990	50
977767a7	51	if (gfs2_is_jdata(ip) \|\| !gfs2_is_ordered(sdp))
845802b1 AG	52	return;
845802b1 AG	53
7542486b	54	if (list_empty(&ip->i_ordered)) {
45138990	55	spin_lock(&sdp->sd_ordered_lock);
7542486b	56	if (list_empty(&ip->i_ordered))
a5b1d3fc	57	list_add(&ip->i_ordered, &sdp->sd_log_ordered);
45138990 SW	58	spin_unlock(&sdp->sd_ordered_lock);
	59	}
	60	}
2e9eeaa1	61
0b2355fe AG	62	void gfs2_ordered_del_inode(struct gfs2_inode *ip);
	63	unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct);
	64	void gfs2_remove_from_ail(struct gfs2_bufdata *bd);
	65	bool gfs2_log_is_empty(struct gfs2_sbd *sdp);
	66	void gfs2_log_release_revokes(struct gfs2_sbd *sdp, unsigned int revokes);
	67	void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks);
	68	bool gfs2_log_try_reserve(struct gfs2_sbd sdp, struct gfs2_trans tr,
	69	unsigned int *extra_revokes);
	70	void gfs2_log_reserve(struct gfs2_sbd sdp, struct gfs2_trans tr,
	71	unsigned int *extra_revokes);
	72	void gfs2_write_log_header(struct gfs2_sbd sdp, struct gfs2_jdesc jd,
	73	u64 seq, u32 tail, u32 lblock, u32 flags,
	74	blk_opf_t op_flags);
	75	void gfs2_log_flush(struct gfs2_sbd sdp, struct gfs2_glock gl,
	76	u32 type);
	77	void gfs2_log_commit(struct gfs2_sbd sdp, struct gfs2_trans trans);
	78	void gfs2_ail1_flush(struct gfs2_sbd sdp, struct writeback_control wbc);
	79	void log_flush_wait(struct gfs2_sbd *sdp);
2bcd610d	80
0b2355fe AG	81	int gfs2_logd(void *data);
	82	void gfs2_add_revoke(struct gfs2_sbd sdp, struct gfs2_bufdata bd);
	83	void gfs2_glock_remove_revoke(struct gfs2_glock *gl);
	84	void gfs2_flush_revokes(struct gfs2_sbd *sdp);
	85	void gfs2_ail_drain(struct gfs2_sbd *sdp);
b3b94faa DT	86
b3b94faa DT	87	#endif /* __LOG_DOT_H__ */