fs/gfs2/lops.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   4  * Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
   5  */
   6
   7 #ifndef __LOPS_DOT_H__
   8 #define __LOPS_DOT_H__
   9
  10 #include <linux/list.h>
  11 #include "incore.h"
  12
  13 #define BUF_OFFSET \
  14         ((sizeof(struct gfs2_log_descriptor) + sizeof(__be64) - 1) & \
  15          ~(sizeof(__be64) - 1))
  16 #define DATABUF_OFFSET \
  17         ((sizeof(struct gfs2_log_descriptor) + (2 * sizeof(__be64) - 1)) & \
  18          ~(2 * sizeof(__be64) - 1))
  19
  20 extern const struct gfs2_log_operations *gfs2_log_ops[];
  21 extern void gfs2_log_incr_head(struct gfs2_sbd *sdp);
  22 extern u64 gfs2_log_bmap(struct gfs2_jdesc *jd, unsigned int lbn);
  23 extern void gfs2_log_write(struct gfs2_sbd *sdp, struct page *page,
  24                            unsigned size, unsigned offset, u64 blkno);
  25 extern void gfs2_log_write_page(struct gfs2_sbd *sdp, struct page *page);
  26 extern void gfs2_log_submit_bio(struct bio **biop, int opf);
  27 extern void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh);
  28 extern int gfs2_find_jhead(struct gfs2_jdesc *jd,
  29                            struct gfs2_log_header_host *head, bool keep_cache);
  30 static inline unsigned int buf_limit(struct gfs2_sbd *sdp)
  31 {
  32         unsigned int limit;
  33
  34         limit = (sdp->sd_sb.sb_bsize - BUF_OFFSET) / sizeof(__be64);
  35         return limit;
  36 }
  37
  38 static inline unsigned int databuf_limit(struct gfs2_sbd *sdp)
  39 {
  40         unsigned int limit;
  41
  42         limit = (sdp->sd_sb.sb_bsize - DATABUF_OFFSET) / (2 * sizeof(__be64));
  43         return limit;
  44 }
  45
  46 static inline void lops_before_commit(struct gfs2_sbd *sdp,
  47                                       struct gfs2_trans *tr)
  48 {
  49         int x;
  50         for (x = 0; gfs2_log_ops[x]; x++)
  51                 if (gfs2_log_ops[x]->lo_before_commit)
  52                         gfs2_log_ops[x]->lo_before_commit(sdp, tr);
  53 }
  54
  55 static inline void lops_after_commit(struct gfs2_sbd *sdp,
  56                                      struct gfs2_trans *tr)
  57 {
  58         int x;
  59         for (x = 0; gfs2_log_ops[x]; x++)
  60                 if (gfs2_log_ops[x]->lo_after_commit)
  61                         gfs2_log_ops[x]->lo_after_commit(sdp, tr);
  62 }
  63
  64 static inline void lops_before_scan(struct gfs2_jdesc *jd,
  65                                     struct gfs2_log_header_host *head,
  66                                     unsigned int pass)
  67 {
  68         int x;
  69         for (x = 0; gfs2_log_ops[x]; x++)
  70                 if (gfs2_log_ops[x]->lo_before_scan)
  71                         gfs2_log_ops[x]->lo_before_scan(jd, head, pass);
  72 }
  73
  74 static inline int lops_scan_elements(struct gfs2_jdesc *jd, u32 start,
  75                                      struct gfs2_log_descriptor *ld,
  76                                      __be64 *ptr,
  77                                      unsigned int pass)
  78 {
  79         int x, error;
  80         for (x = 0; gfs2_log_ops[x]; x++)
  81                 if (gfs2_log_ops[x]->lo_scan_elements) {
  82                         error = gfs2_log_ops[x]->lo_scan_elements(jd, start,
  83                                                                   ld, ptr, pass);
  84                         if (error)
  85                                 return error;
  86                 }
  87
  88         return 0;
  89 }
  90
  91 static inline void lops_after_scan(struct gfs2_jdesc *jd, int error,
  92                                    unsigned int pass)
  93 {
  94         int x;
  95         for (x = 0; gfs2_log_ops[x]; x++)
  96                 if (gfs2_log_ops[x]->lo_before_scan)
  97                         gfs2_log_ops[x]->lo_after_scan(jd, error, pass);
  98 }
  99
 100 #endif /* __LOPS_DOT_H__ */
 101