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 void gfs2_log_write_page(struct gfs2_sbd *sdp, struct page *page); 30 extern void gfs2_log_flush_bio(struct gfs2_sbd *sdp, int op, int op_flags); 31 extern void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh); 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_before_commit(struct gfs2_sbd *sdp, 50 struct gfs2_trans *tr) 51 { 52 int x; 53 for (x = 0; gfs2_log_ops[x]; x++) 54 if (gfs2_log_ops[x]->lo_before_commit) 55 gfs2_log_ops[x]->lo_before_commit(sdp, tr); 56 } 57 58 static inline void lops_after_commit(struct gfs2_sbd *sdp, 59 struct gfs2_trans *tr) 60 { 61 int x; 62 for (x = 0; gfs2_log_ops[x]; x++) 63 if (gfs2_log_ops[x]->lo_after_commit) 64 gfs2_log_ops[x]->lo_after_commit(sdp, tr); 65 } 66 67 static inline void lops_before_scan(struct gfs2_jdesc *jd, 68 struct gfs2_log_header_host *head, 69 unsigned int pass) 70 { 71 int x; 72 for (x = 0; gfs2_log_ops[x]; x++) 73 if (gfs2_log_ops[x]->lo_before_scan) 74 gfs2_log_ops[x]->lo_before_scan(jd, head, pass); 75 } 76 77 static inline int lops_scan_elements(struct gfs2_jdesc *jd, unsigned int start, 78 struct gfs2_log_descriptor *ld, 79 __be64 *ptr, 80 unsigned int pass) 81 { 82 int x, error; 83 for (x = 0; gfs2_log_ops[x]; x++) 84 if (gfs2_log_ops[x]->lo_scan_elements) { 85 error = gfs2_log_ops[x]->lo_scan_elements(jd, start, 86 ld, ptr, pass); 87 if (error) 88 return error; 89 } 90 91 return 0; 92 } 93 94 static inline void lops_after_scan(struct gfs2_jdesc *jd, int error, 95 unsigned int pass) 96 { 97 int x; 98 for (x = 0; gfs2_log_ops[x]; x++) 99 if (gfs2_log_ops[x]->lo_before_scan) 100 gfs2_log_ops[x]->lo_after_scan(jd, error, pass); 101 } 102 103 #endif /* __LOPS_DOT_H__ */ 104 105