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 extern void gfs2_meta_sync(struct gfs2_glock *gl);
  31
  32 static inline unsigned int buf_limit(struct gfs2_sbd *sdp)
  33 {
  34         unsigned int limit;
  35
  36         limit = (sdp->sd_sb.sb_bsize - BUF_OFFSET) / sizeof(__be64);
  37         return limit;
  38 }
  39
  40 static inline unsigned int databuf_limit(struct gfs2_sbd *sdp)
  41 {
  42         unsigned int limit;
  43
  44         limit = (sdp->sd_sb.sb_bsize - DATABUF_OFFSET) / (2 * sizeof(__be64));
  45         return limit;
  46 }
  47
  48 static inline void lops_before_commit(struct gfs2_sbd *sdp,
  49                                       struct gfs2_trans *tr)
  50 {
  51         int x;
  52         for (x = 0; gfs2_log_ops[x]; x++)
  53                 if (gfs2_log_ops[x]->lo_before_commit)
  54                         gfs2_log_ops[x]->lo_before_commit(sdp, tr);
  55 }
  56
  57 static inline void lops_after_commit(struct gfs2_sbd *sdp,
  58                                      struct gfs2_trans *tr)
  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, tr);
  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, u32 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