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 extern const struct gfs2_log_operations *gfs2_log_ops[];
  14
  15 void gfs2_log_incr_head(struct gfs2_sbd *sdp);
  16 u64 gfs2_log_bmap(struct gfs2_jdesc *jd, unsigned int lbn);
  17 void gfs2_log_write(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd,
  18                     struct page *page, unsigned size, unsigned offset,
  19                     u64 blkno);
  20 void gfs2_log_submit_bio(struct bio **biop, blk_opf_t opf);
  21 void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh);
  22 int gfs2_find_jhead(struct gfs2_jdesc *jd,
  23                     struct gfs2_log_header_host *head, bool keep_cache);
  24 void gfs2_drain_revokes(struct gfs2_sbd *sdp);
  25
  26 static inline unsigned int buf_limit(struct gfs2_sbd *sdp)
  27 {
  28         return sdp->sd_ldptrs;
  29 }
  30
  31 static inline unsigned int databuf_limit(struct gfs2_sbd *sdp)
  32 {
  33         return sdp->sd_ldptrs / 2;
  34 }
  35
  36 static inline void lops_before_commit(struct gfs2_sbd *sdp,
  37                                       struct gfs2_trans *tr)
  38 {
  39         int x;
  40         for (x = 0; gfs2_log_ops[x]; x++)
  41                 if (gfs2_log_ops[x]->lo_before_commit)
  42                         gfs2_log_ops[x]->lo_before_commit(sdp, tr);
  43 }
  44
  45 static inline void lops_after_commit(struct gfs2_sbd *sdp,
  46                                      struct gfs2_trans *tr)
  47 {
  48         int x;
  49         for (x = 0; gfs2_log_ops[x]; x++)
  50                 if (gfs2_log_ops[x]->lo_after_commit)
  51                         gfs2_log_ops[x]->lo_after_commit(sdp, tr);
  52 }
  53
  54 static inline void lops_before_scan(struct gfs2_jdesc *jd,
  55                                     struct gfs2_log_header_host *head,
  56                                     unsigned int pass)
  57 {
  58         int x;
  59         for (x = 0; gfs2_log_ops[x]; x++)
  60                 if (gfs2_log_ops[x]->lo_before_scan)
  61                         gfs2_log_ops[x]->lo_before_scan(jd, head, pass);
  62 }
  63
  64 static inline int lops_scan_elements(struct gfs2_jdesc *jd, u32 start,
  65                                      struct gfs2_log_descriptor *ld,
  66                                      __be64 *ptr,
  67                                      unsigned int pass)
  68 {
  69         int x, error;
  70         for (x = 0; gfs2_log_ops[x]; x++)
  71                 if (gfs2_log_ops[x]->lo_scan_elements) {
  72                         error = gfs2_log_ops[x]->lo_scan_elements(jd, start,
  73                                                                   ld, ptr, pass);
  74                         if (error)
  75                                 return error;
  76                 }
  77
  78         return 0;
  79 }
  80
  81 static inline void lops_after_scan(struct gfs2_jdesc *jd, int error,
  82                                    unsigned int pass)
  83 {
  84         int x;
  85         for (x = 0; gfs2_log_ops[x]; x++)
  86                 if (gfs2_log_ops[x]->lo_before_scan)
  87                         gfs2_log_ops[x]->lo_after_scan(jd, error, pass);
  88 }
  89
  90 #endif /* __LOPS_DOT_H__ */
  91