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_databuf_lops;
27 
28 extern const struct gfs2_log_operations *gfs2_log_ops[];
29 extern u64 gfs2_log_bmap(struct gfs2_sbd *sdp);
30 extern void gfs2_log_write(struct gfs2_sbd *sdp, struct page *page,
31 			   unsigned size, unsigned offset, u64 blkno);
32 extern void gfs2_log_write_page(struct gfs2_sbd *sdp, struct page *page);
33 extern void gfs2_log_flush_bio(struct gfs2_sbd *sdp, int op, int op_flags);
34 extern void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh);
35 
buf_limit(struct gfs2_sbd * sdp)36 static inline unsigned int buf_limit(struct gfs2_sbd *sdp)
37 {
38 	unsigned int limit;
39 
40 	limit = (sdp->sd_sb.sb_bsize - BUF_OFFSET) / sizeof(__be64);
41 	return limit;
42 }
43 
databuf_limit(struct gfs2_sbd * sdp)44 static inline unsigned int databuf_limit(struct gfs2_sbd *sdp)
45 {
46 	unsigned int limit;
47 
48 	limit = (sdp->sd_sb.sb_bsize - DATABUF_OFFSET) / (2 * sizeof(__be64));
49 	return limit;
50 }
51 
lops_before_commit(struct gfs2_sbd * sdp,struct gfs2_trans * tr)52 static inline void lops_before_commit(struct gfs2_sbd *sdp,
53 				      struct gfs2_trans *tr)
54 {
55 	int x;
56 	for (x = 0; gfs2_log_ops[x]; x++)
57 		if (gfs2_log_ops[x]->lo_before_commit)
58 			gfs2_log_ops[x]->lo_before_commit(sdp, tr);
59 }
60 
lops_after_commit(struct gfs2_sbd * sdp,struct gfs2_trans * tr)61 static inline void lops_after_commit(struct gfs2_sbd *sdp,
62 				     struct gfs2_trans *tr)
63 {
64 	int x;
65 	for (x = 0; gfs2_log_ops[x]; x++)
66 		if (gfs2_log_ops[x]->lo_after_commit)
67 			gfs2_log_ops[x]->lo_after_commit(sdp, tr);
68 }
69 
lops_before_scan(struct gfs2_jdesc * jd,struct gfs2_log_header_host * head,unsigned int pass)70 static inline void lops_before_scan(struct gfs2_jdesc *jd,
71 				    struct gfs2_log_header_host *head,
72 				    unsigned int pass)
73 {
74 	int x;
75 	for (x = 0; gfs2_log_ops[x]; x++)
76 		if (gfs2_log_ops[x]->lo_before_scan)
77 			gfs2_log_ops[x]->lo_before_scan(jd, head, pass);
78 }
79 
lops_scan_elements(struct gfs2_jdesc * jd,unsigned int start,struct gfs2_log_descriptor * ld,__be64 * ptr,unsigned int pass)80 static inline int lops_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
81 				     struct gfs2_log_descriptor *ld,
82 				     __be64 *ptr,
83 				     unsigned int pass)
84 {
85 	int x, error;
86 	for (x = 0; gfs2_log_ops[x]; x++)
87 		if (gfs2_log_ops[x]->lo_scan_elements) {
88 			error = gfs2_log_ops[x]->lo_scan_elements(jd, start,
89 								  ld, ptr, pass);
90 			if (error)
91 				return error;
92 		}
93 
94 	return 0;
95 }
96 
lops_after_scan(struct gfs2_jdesc * jd,int error,unsigned int pass)97 static inline void lops_after_scan(struct gfs2_jdesc *jd, int error,
98 				   unsigned int pass)
99 {
100 	int x;
101 	for (x = 0; gfs2_log_ops[x]; x++)
102 		if (gfs2_log_ops[x]->lo_before_scan)
103 			gfs2_log_ops[x]->lo_after_scan(jd, error, pass);
104 }
105 
106 #endif /* __LOPS_DOT_H__ */
107 
108