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
23 static 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
35 static 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
41 static 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
50 unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct,
51 unsigned int ssize);
52
53 int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks);
54 void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks);
55 void gfs2_log_incr_head(struct gfs2_sbd *sdp);
56
57 struct buffer_head *gfs2_log_get_buf(struct gfs2_sbd *sdp);
58 struct buffer_head *gfs2_log_fake_buf(struct gfs2_sbd *sdp,
59 struct buffer_head *real);
60 void __gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl);
61
62 static inline void gfs2_log_flush(struct gfs2_sbd *sbd, struct gfs2_glock *gl)
63 {
64 if (!gl || test_bit(GLF_LFLUSH, &gl->gl_flags))
65 __gfs2_log_flush(sbd, gl);
66 }
67
68 void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *trans);
69 void gfs2_remove_from_ail(struct gfs2_bufdata *bd);
70
71 void gfs2_log_shutdown(struct gfs2_sbd *sdp);
72 void gfs2_meta_syncfs(struct gfs2_sbd *sdp);
73 int gfs2_logd(void *data);
74
75 #endif /* __LOG_DOT_H__ */
76
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