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