1/*
2 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
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
7 * of the GNU General Public License version 2.
8 */
9
10#ifndef __LOG_DOT_H__
11#define __LOG_DOT_H__
12
13#include <linux/list.h>
14#include <linux/spinlock.h>
15#include "incore.h"
16
17/**
18 * gfs2_log_lock - acquire the right to mess with the log manager
19 * @sdp: the filesystem
20 *
21 */
22
23static inline void gfs2_log_lock(struct gfs2_sbd *sdp)
24__acquires(&sdp->sd_log_lock)
25{
26	spin_lock(&sdp->sd_log_lock);
27}
28
29/**
30 * gfs2_log_unlock - release the right to mess with the log manager
31 * @sdp: the filesystem
32 *
33 */
34
35static inline void gfs2_log_unlock(struct gfs2_sbd *sdp)
36__releases(&sdp->sd_log_lock)
37{
38	spin_unlock(&sdp->sd_log_lock);
39}
40
41static inline void gfs2_log_pointers_init(struct gfs2_sbd *sdp,
42					  unsigned int value)
43{
44	if (++value == sdp->sd_jdesc->jd_blocks) {
45		value = 0;
46	}
47	sdp->sd_log_head = sdp->sd_log_tail = value;
48}
49
50extern unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct,
51			    unsigned int ssize);
52
53extern int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks);
54extern void gfs2_log_incr_head(struct gfs2_sbd *sdp);
55
56extern struct buffer_head *gfs2_log_get_buf(struct gfs2_sbd *sdp);
57extern struct buffer_head *gfs2_log_fake_buf(struct gfs2_sbd *sdp,
58				      struct buffer_head *real);
59extern void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl);
60extern void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *trans);
61extern void gfs2_remove_from_ail(struct gfs2_bufdata *bd);
62
63extern void gfs2_log_shutdown(struct gfs2_sbd *sdp);
64extern void gfs2_meta_syncfs(struct gfs2_sbd *sdp);
65extern int gfs2_logd(void *data);
66
67#endif /* __LOG_DOT_H__ */
68