1/*
2 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
3 * Copyright (C) 2004-2008 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 __LOPS_DOT_H__
11#define __LOPS_DOT_H__
12
13#include <linux/list.h>
14#include "incore.h"
15
16#define BUF_OFFSET \
17	((sizeof(struct gfs2_log_descriptor) + sizeof(__be64) - 1) & \
18	 ~(sizeof(__be64) - 1))
19#define DATABUF_OFFSET \
20	((sizeof(struct gfs2_log_descriptor) + (2 * sizeof(__be64) - 1)) & \
21	 ~(2 * sizeof(__be64) - 1))
22
23extern const struct gfs2_log_operations gfs2_glock_lops;
24extern const struct gfs2_log_operations gfs2_buf_lops;
25extern const struct gfs2_log_operations gfs2_revoke_lops;
26extern const struct gfs2_log_operations gfs2_databuf_lops;
27
28extern const struct gfs2_log_operations *gfs2_log_ops[];
29extern void gfs2_log_write_page(struct gfs2_sbd *sdp, struct page *page);
30extern void gfs2_log_flush_bio(struct gfs2_sbd *sdp, int rw);
31extern void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh);
32
33static inline unsigned int buf_limit(struct gfs2_sbd *sdp)
34{
35	unsigned int limit;
36
37	limit = (sdp->sd_sb.sb_bsize - BUF_OFFSET) / sizeof(__be64);
38	return limit;
39}
40
41static inline unsigned int databuf_limit(struct gfs2_sbd *sdp)
42{
43	unsigned int limit;
44
45	limit = (sdp->sd_sb.sb_bsize - DATABUF_OFFSET) / (2 * sizeof(__be64));
46	return limit;
47}
48
49static inline void lops_before_commit(struct gfs2_sbd *sdp,
50				      struct gfs2_trans *tr)
51{
52	int x;
53	for (x = 0; gfs2_log_ops[x]; x++)
54		if (gfs2_log_ops[x]->lo_before_commit)
55			gfs2_log_ops[x]->lo_before_commit(sdp, tr);
56}
57
58static inline void lops_after_commit(struct gfs2_sbd *sdp,
59				     struct gfs2_trans *tr)
60{
61	int x;
62	for (x = 0; gfs2_log_ops[x]; x++)
63		if (gfs2_log_ops[x]->lo_after_commit)
64			gfs2_log_ops[x]->lo_after_commit(sdp, tr);
65}
66
67static inline void lops_before_scan(struct gfs2_jdesc *jd,
68				    struct gfs2_log_header_host *head,
69				    unsigned int pass)
70{
71	int x;
72	for (x = 0; gfs2_log_ops[x]; x++)
73		if (gfs2_log_ops[x]->lo_before_scan)
74			gfs2_log_ops[x]->lo_before_scan(jd, head, pass);
75}
76
77static inline int lops_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
78				     struct gfs2_log_descriptor *ld,
79				     __be64 *ptr,
80				     unsigned int pass)
81{
82	int x, error;
83	for (x = 0; gfs2_log_ops[x]; x++)
84		if (gfs2_log_ops[x]->lo_scan_elements) {
85			error = gfs2_log_ops[x]->lo_scan_elements(jd, start,
86								  ld, ptr, pass);
87			if (error)
88				return error;
89		}
90
91	return 0;
92}
93
94static inline void lops_after_scan(struct gfs2_jdesc *jd, int error,
95				   unsigned int pass)
96{
97	int x;
98	for (x = 0; gfs2_log_ops[x]; x++)
99		if (gfs2_log_ops[x]->lo_before_scan)
100			gfs2_log_ops[x]->lo_after_scan(jd, error, pass);
101}
102
103#endif /* __LOPS_DOT_H__ */
104
105