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gfs2: Remove unnecessary extern declarations
[linux.git] / fs / gfs2 / lops.h
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_log_ops[];
24 extern u64 gfs2_log_bmap(struct gfs2_sbd *sdp);
25 extern void gfs2_log_write(struct gfs2_sbd *sdp, struct page *page,
26                            unsigned size, unsigned offset, u64 blkno);
27 extern void gfs2_log_write_page(struct gfs2_sbd *sdp, struct page *page);
28 extern void gfs2_log_submit_bio(struct bio **biop, int op, int op_flags);
29 extern void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh);
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_before_commit(struct gfs2_sbd *sdp,
48                                       struct gfs2_trans *tr)
49 {
50         int x;
51         for (x = 0; gfs2_log_ops[x]; x++)
52                 if (gfs2_log_ops[x]->lo_before_commit)
53                         gfs2_log_ops[x]->lo_before_commit(sdp, tr);
54 }
55
56 static inline void lops_after_commit(struct gfs2_sbd *sdp,
57                                      struct gfs2_trans *tr)
58 {
59         int x;
60         for (x = 0; gfs2_log_ops[x]; x++)
61                 if (gfs2_log_ops[x]->lo_after_commit)
62                         gfs2_log_ops[x]->lo_after_commit(sdp, tr);
63 }
64
65 static inline void lops_before_scan(struct gfs2_jdesc *jd,
66                                     struct gfs2_log_header_host *head,
67                                     unsigned int pass)
68 {
69         int x;
70         for (x = 0; gfs2_log_ops[x]; x++)
71                 if (gfs2_log_ops[x]->lo_before_scan)
72                         gfs2_log_ops[x]->lo_before_scan(jd, head, pass);
73 }
74
75 static inline int lops_scan_elements(struct gfs2_jdesc *jd, u32 start,
76                                      struct gfs2_log_descriptor *ld,
77                                      __be64 *ptr,
78                                      unsigned int pass)
79 {
80         int x, error;
81         for (x = 0; gfs2_log_ops[x]; x++)
82                 if (gfs2_log_ops[x]->lo_scan_elements) {
83                         error = gfs2_log_ops[x]->lo_scan_elements(jd, start,
84                                                                   ld, ptr, pass);
85                         if (error)
86                                 return error;
87                 }
88
89         return 0;
90 }
91
92 static inline void lops_after_scan(struct gfs2_jdesc *jd, int error,
93                                    unsigned int pass)
94 {
95         int x;
96         for (x = 0; gfs2_log_ops[x]; x++)
97                 if (gfs2_log_ops[x]->lo_before_scan)
98                         gfs2_log_ops[x]->lo_after_scan(jd, error, pass);
99 }
100
101 #endif /* __LOPS_DOT_H__ */
102