[linux-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_log_pointers_init(struct gfs2_sbd *sdp,
					  unsigned int value)
{
	if (++value == sdp->sd_jdesc->jd_blocks) {
		value = 0;
	}
	sdp->sd_log_tail = value;
	sdp->sd_log_flush_tail = value;
	sdp->sd_log_head = 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 (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);
	}
}

extern void gfs2_ordered_del_inode(struct gfs2_inode *ip);
extern unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct);
extern void gfs2_remove_from_ail(struct gfs2_bufdata *bd);
extern bool gfs2_log_is_empty(struct gfs2_sbd *sdp);
extern void gfs2_log_release_revokes(struct gfs2_sbd *sdp, unsigned int revokes);
extern void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks);
extern bool gfs2_log_try_reserve(struct gfs2_sbd *sdp, struct gfs2_trans *tr,
				 unsigned int *extra_revokes);
extern void gfs2_log_reserve(struct gfs2_sbd *sdp, struct gfs2_trans *tr,
			     unsigned int *extra_revokes);
extern 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);
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 log_flush_wait(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_glock_remove_revoke(struct gfs2_glock *gl);
extern void gfs2_flush_revokes(struct gfs2_sbd *sdp);
extern 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
	47	static inline void gfs2_log_pointers_init(struct gfs2_sbd *sdp,
	48	unsigned int value)
	49	{
	50	if (++value == sdp->sd_jdesc->jd_blocks) {
	51	value = 0;
b3b94faa	52	}
5cb738b5 AG	53	sdp->sd_log_tail = value;
	54	sdp->sd_log_flush_tail = value;
	55	sdp->sd_log_head = value;
b3b94faa DT	56	}
b3b94faa DT	57
45138990 SW	58	static inline void gfs2_ordered_add_inode(struct gfs2_inode *ip)
45138990 SW	59	{
977767a7	60	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
45138990	61
977767a7	62	if (gfs2_is_jdata(ip) \|\| !gfs2_is_ordered(sdp))
845802b1 AG	63	return;
845802b1 AG	64
7542486b	65	if (list_empty(&ip->i_ordered)) {
45138990	66	spin_lock(&sdp->sd_ordered_lock);
7542486b	67	if (list_empty(&ip->i_ordered))
a5b1d3fc	68	list_add(&ip->i_ordered, &sdp->sd_log_ordered);
45138990 SW	69	spin_unlock(&sdp->sd_ordered_lock);
	70	}
	71	}
2e9eeaa1	72
45138990	73	extern void gfs2_ordered_del_inode(struct gfs2_inode *ip);
2e9eeaa1	74	extern unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct);
68942870	75	extern void gfs2_remove_from_ail(struct gfs2_bufdata *bd);
f3708fb5	76	extern bool gfs2_log_is_empty(struct gfs2_sbd *sdp);
2129b428	77	extern void gfs2_log_release_revokes(struct gfs2_sbd *sdp, unsigned int revokes);
24972557	78	extern void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks);
2129b428 AG	79	extern bool gfs2_log_try_reserve(struct gfs2_sbd sdp, struct gfs2_trans tr,
	80	unsigned int *extra_revokes);
	81	extern void gfs2_log_reserve(struct gfs2_sbd sdp, struct gfs2_trans tr,
	82	unsigned int *extra_revokes);
c1696fb8	83	extern void gfs2_write_log_header(struct gfs2_sbd sdp, struct gfs2_jdesc jd,
7c70b896	84	u64 seq, u32 tail, u32 lblock, u32 flags,
67688c08	85	blk_opf_t op_flags);
24972557	86	extern void gfs2_log_flush(struct gfs2_sbd sdp, struct gfs2_glock gl,
c1696fb8	87	u32 type);
ed4878e8	88	extern void gfs2_log_commit(struct gfs2_sbd sdp, struct gfs2_trans trans);
4667a0ec	89	extern void gfs2_ail1_flush(struct gfs2_sbd sdp, struct writeback_control wbc);
9ff78289	90	extern void log_flush_wait(struct gfs2_sbd *sdp);
2bcd610d	91
ed4878e8	92	extern int gfs2_logd(void *data);
5d054964	93	extern void gfs2_add_revoke(struct gfs2_sbd sdp, struct gfs2_bufdata bd);
fe5e7ba1	94	extern void gfs2_glock_remove_revoke(struct gfs2_glock *gl);
e7501bf8	95	extern void gfs2_flush_revokes(struct gfs2_sbd *sdp);
f5456b5d	96	extern void gfs2_ail_drain(struct gfs2_sbd *sdp);
b3b94faa DT	97
b3b94faa DT	98	#endif /* __LOG_DOT_H__ */