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 <linux/writeback.h>
16 #include "incore.h"
17
18 /**
19 * gfs2_log_lock - acquire the right to mess with the log manager
20 * @sdp: the filesystem
21 *
22 */
23
gfs2_log_lock(struct gfs2_sbd * sdp)24 static inline void gfs2_log_lock(struct gfs2_sbd *sdp)
25 __acquires(&sdp->sd_log_lock)
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
gfs2_log_unlock(struct gfs2_sbd * sdp)36 static inline void gfs2_log_unlock(struct gfs2_sbd *sdp)
37 __releases(&sdp->sd_log_lock)
38 {
39 spin_unlock(&sdp->sd_log_lock);
40 }
41
gfs2_log_pointers_init(struct gfs2_sbd * sdp,unsigned int value)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;
47 }
48 sdp->sd_log_head = sdp->sd_log_tail = value;
49 }
50
51 extern unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct,
52 unsigned int ssize);
53
54 extern int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks);
55 extern void gfs2_log_incr_head(struct gfs2_sbd *sdp);
56 extern u64 gfs2_log_bmap(struct gfs2_sbd *sdp, unsigned int lbn);
57 extern void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl);
58 extern void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *trans);
59 extern void gfs2_remove_from_ail(struct gfs2_bufdata *bd);
60 extern void gfs2_ail1_flush(struct gfs2_sbd *sdp, struct writeback_control *wbc);
61
62 extern void gfs2_log_shutdown(struct gfs2_sbd *sdp);
63 extern void gfs2_meta_syncfs(struct gfs2_sbd *sdp);
64 extern int gfs2_logd(void *data);
65
66 #endif /* __LOG_DOT_H__ */
67