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 op, int op_flags); 34 extern void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh); 35 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 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 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 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 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 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 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