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
23 extern const struct gfs2_log_operations gfs2_glock_lops;
24 extern const struct gfs2_log_operations gfs2_buf_lops;
25 extern const struct gfs2_log_operations gfs2_revoke_lops;
26 extern const struct gfs2_log_operations gfs2_rg_lops;
27 extern const struct gfs2_log_operations gfs2_databuf_lops;
28
29 extern const struct gfs2_log_operations *gfs2_log_ops[];
30
31 static inline unsigned int buf_limit(struct gfs2_sbd *sdp)
32 {
33 unsigned int limit;
34
35 limit = (sdp->sd_sb.sb_bsize - BUF_OFFSET) / sizeof(__be64);
36 return limit;
37 }
38
39 static inline unsigned int databuf_limit(struct gfs2_sbd *sdp)
40 {
41 unsigned int limit;
42
43 limit = (sdp->sd_sb.sb_bsize - DATABUF_OFFSET) / (2 * sizeof(__be64));
44 return limit;
45 }
46
47 static inline void lops_init_le(struct gfs2_log_element *le,
48 const struct gfs2_log_operations *lops)
49 {
50 INIT_LIST_HEAD(&le->le_list);
51 le->le_ops = lops;
52 }
53
54 static inline void lops_add(struct gfs2_sbd *sdp, struct gfs2_log_element *le)
55 {
56 if (le->le_ops->lo_add)
57 le->le_ops->lo_add(sdp, le);
58 }
59
60 static inline void lops_before_commit(struct gfs2_sbd *sdp)
61 {
62 int x;
63 for (x = 0; gfs2_log_ops[x]; x++)
64 if (gfs2_log_ops[x]->lo_before_commit)
65 gfs2_log_ops[x]->lo_before_commit(sdp);
66 }
67
68 static inline void lops_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai)
69 {
70 int x;
71 for (x = 0; gfs2_log_ops[x]; x++)
72 if (gfs2_log_ops[x]->lo_after_commit)
73 gfs2_log_ops[x]->lo_after_commit(sdp, ai);
74 }
75
76 static inline void lops_before_scan(struct gfs2_jdesc *jd,
77 struct gfs2_log_header_host *head,
78 unsigned int pass)
79 {
80 int x;
81 for (x = 0; gfs2_log_ops[x]; x++)
82 if (gfs2_log_ops[x]->lo_before_scan)
83 gfs2_log_ops[x]->lo_before_scan(jd, head, pass);
84 }
85
86 static inline int lops_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
87 struct gfs2_log_descriptor *ld,
88 __be64 *ptr,
89 unsigned int pass)
90 {
91 int x, error;
92 for (x = 0; gfs2_log_ops[x]; x++)
93 if (gfs2_log_ops[x]->lo_scan_elements) {
94 error = gfs2_log_ops[x]->lo_scan_elements(jd, start,
95 ld, ptr, pass);
96 if (error)
97 return error;
98 }
99
100 return 0;
101 }
102
103 static inline void lops_after_scan(struct gfs2_jdesc *jd, int error,
104 unsigned int pass)
105 {
106 int x;
107 for (x = 0; gfs2_log_ops[x]; x++)
108 if (gfs2_log_ops[x]->lo_before_scan)
109 gfs2_log_ops[x]->lo_after_scan(jd, error, pass);
110 }
111
112 #endif /* __LOPS_DOT_H__ */
113
114
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