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_submit_bio(struct bio **biop, int opf); 34 extern void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh); 35 extern int gfs2_find_jhead(struct gfs2_jdesc *jd, 36 struct gfs2_log_header_host *head); 37 38 static inline unsigned int buf_limit(struct gfs2_sbd *sdp) 39 { 40 unsigned int limit; 41 42 limit = (sdp->sd_sb.sb_bsize - BUF_OFFSET) / sizeof(__be64); 43 return limit; 44 } 45 46 static inline unsigned int databuf_limit(struct gfs2_sbd *sdp) 47 { 48 unsigned int limit; 49 50 limit = (sdp->sd_sb.sb_bsize - DATABUF_OFFSET) / (2 * sizeof(__be64)); 51 return limit; 52 } 53 54 static inline void lops_before_commit(struct gfs2_sbd *sdp, 55 struct gfs2_trans *tr) 56 { 57 int x; 58 for (x = 0; gfs2_log_ops[x]; x++) 59 if (gfs2_log_ops[x]->lo_before_commit) 60 gfs2_log_ops[x]->lo_before_commit(sdp, tr); 61 } 62 63 static inline void lops_after_commit(struct gfs2_sbd *sdp, 64 struct gfs2_trans *tr) 65 { 66 int x; 67 for (x = 0; gfs2_log_ops[x]; x++) 68 if (gfs2_log_ops[x]->lo_after_commit) 69 gfs2_log_ops[x]->lo_after_commit(sdp, tr); 70 } 71 72 static inline void lops_before_scan(struct gfs2_jdesc *jd, 73 struct gfs2_log_header_host *head, 74 unsigned int pass) 75 { 76 int x; 77 for (x = 0; gfs2_log_ops[x]; x++) 78 if (gfs2_log_ops[x]->lo_before_scan) 79 gfs2_log_ops[x]->lo_before_scan(jd, head, pass); 80 } 81 82 static inline int lops_scan_elements(struct gfs2_jdesc *jd, unsigned int start, 83 struct gfs2_log_descriptor *ld, 84 __be64 *ptr, 85 unsigned int pass) 86 { 87 int x, error; 88 for (x = 0; gfs2_log_ops[x]; x++) 89 if (gfs2_log_ops[x]->lo_scan_elements) { 90 error = gfs2_log_ops[x]->lo_scan_elements(jd, start, 91 ld, ptr, pass); 92 if (error) 93 return error; 94 } 95 96 return 0; 97 } 98 99 static inline void lops_after_scan(struct gfs2_jdesc *jd, int error, 100 unsigned int pass) 101 { 102 int x; 103 for (x = 0; gfs2_log_ops[x]; x++) 104 if (gfs2_log_ops[x]->lo_before_scan) 105 gfs2_log_ops[x]->lo_after_scan(jd, error, pass); 106 } 107 108 #endif /* __LOPS_DOT_H__ */ 109 110