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 extern void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh); 33 34 static inline unsigned int buf_limit(struct gfs2_sbd *sdp) 35 { 36 unsigned int limit; 37 38 limit = (sdp->sd_sb.sb_bsize - BUF_OFFSET) / sizeof(__be64); 39 return limit; 40 } 41 42 static inline unsigned int databuf_limit(struct gfs2_sbd *sdp) 43 { 44 unsigned int limit; 45 46 limit = (sdp->sd_sb.sb_bsize - DATABUF_OFFSET) / (2 * sizeof(__be64)); 47 return limit; 48 } 49 50 static inline void lops_before_commit(struct gfs2_sbd *sdp) 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); 56 } 57 58 static inline void lops_after_commit(struct gfs2_sbd *sdp, struct gfs2_ail *ai) 59 { 60 int x; 61 for (x = 0; gfs2_log_ops[x]; x++) 62 if (gfs2_log_ops[x]->lo_after_commit) 63 gfs2_log_ops[x]->lo_after_commit(sdp, ai); 64 } 65 66 static inline void lops_before_scan(struct gfs2_jdesc *jd, 67 struct gfs2_log_header_host *head, 68 unsigned int pass) 69 { 70 int x; 71 for (x = 0; gfs2_log_ops[x]; x++) 72 if (gfs2_log_ops[x]->lo_before_scan) 73 gfs2_log_ops[x]->lo_before_scan(jd, head, pass); 74 } 75 76 static inline int lops_scan_elements(struct gfs2_jdesc *jd, unsigned int start, 77 struct gfs2_log_descriptor *ld, 78 __be64 *ptr, 79 unsigned int pass) 80 { 81 int x, error; 82 for (x = 0; gfs2_log_ops[x]; x++) 83 if (gfs2_log_ops[x]->lo_scan_elements) { 84 error = gfs2_log_ops[x]->lo_scan_elements(jd, start, 85 ld, ptr, pass); 86 if (error) 87 return error; 88 } 89 90 return 0; 91 } 92 93 static inline void lops_after_scan(struct gfs2_jdesc *jd, int error, 94 unsigned int pass) 95 { 96 int x; 97 for (x = 0; gfs2_log_ops[x]; x++) 98 if (gfs2_log_ops[x]->lo_before_scan) 99 gfs2_log_ops[x]->lo_after_scan(jd, error, pass); 100 } 101 102 #endif /* __LOPS_DOT_H__ */ 103 104