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 extern void gfs2_log_write_page(struct gfs2_sbd *sdp, struct page *page); 31 extern void gfs2_log_flush_bio(struct gfs2_sbd *sdp, int rw); 32 33 static inline unsigned int buf_limit(struct gfs2_sbd *sdp) 34 { 35 unsigned int limit; 36 37 limit = (sdp->sd_sb.sb_bsize - BUF_OFFSET) / sizeof(__be64); 38 return limit; 39 } 40 41 static inline unsigned int databuf_limit(struct gfs2_sbd *sdp) 42 { 43 unsigned int limit; 44 45 limit = (sdp->sd_sb.sb_bsize - DATABUF_OFFSET) / (2 * sizeof(__be64)); 46 return limit; 47 } 48 49 static inline void lops_init_le(struct gfs2_bufdata *bd, 50 const struct gfs2_log_operations *lops) 51 { 52 INIT_LIST_HEAD(&bd->bd_list); 53 bd->bd_ops = lops; 54 } 55 56 static inline void lops_add(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd) 57 { 58 if (bd->bd_ops->lo_add) 59 bd->bd_ops->lo_add(sdp, bd); 60 } 61 62 static inline void lops_before_commit(struct gfs2_sbd *sdp) 63 { 64 int x; 65 for (x = 0; gfs2_log_ops[x]; x++) 66 if (gfs2_log_ops[x]->lo_before_commit) 67 gfs2_log_ops[x]->lo_before_commit(sdp); 68 } 69 70 static inline void lops_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) 71 { 72 int x; 73 for (x = 0; gfs2_log_ops[x]; x++) 74 if (gfs2_log_ops[x]->lo_after_commit) 75 gfs2_log_ops[x]->lo_after_commit(sdp, ai); 76 } 77 78 static inline void lops_before_scan(struct gfs2_jdesc *jd, 79 struct gfs2_log_header_host *head, 80 unsigned int pass) 81 { 82 int x; 83 for (x = 0; gfs2_log_ops[x]; x++) 84 if (gfs2_log_ops[x]->lo_before_scan) 85 gfs2_log_ops[x]->lo_before_scan(jd, head, pass); 86 } 87 88 static inline int lops_scan_elements(struct gfs2_jdesc *jd, unsigned int start, 89 struct gfs2_log_descriptor *ld, 90 __be64 *ptr, 91 unsigned int pass) 92 { 93 int x, error; 94 for (x = 0; gfs2_log_ops[x]; x++) 95 if (gfs2_log_ops[x]->lo_scan_elements) { 96 error = gfs2_log_ops[x]->lo_scan_elements(jd, start, 97 ld, ptr, pass); 98 if (error) 99 return error; 100 } 101 102 return 0; 103 } 104 105 static inline void lops_after_scan(struct gfs2_jdesc *jd, int error, 106 unsigned int pass) 107 { 108 int x; 109 for (x = 0; gfs2_log_ops[x]; x++) 110 if (gfs2_log_ops[x]->lo_before_scan) 111 gfs2_log_ops[x]->lo_after_scan(jd, error, pass); 112 } 113 114 #endif /* __LOPS_DOT_H__ */ 115 116