LXR linux/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
  13extern const struct gfs2_log_operations *gfs2_log_ops[];
  14extern void gfs2_log_incr_head(struct gfs2_sbd *sdp);
  15extern u64 gfs2_log_bmap(struct gfs2_jdesc *jd, unsigned int lbn);
  16extern void gfs2_log_write(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd,
  17                           struct page *page, unsigned size, unsigned offset,
  18                           u64 blkno);
  19extern void gfs2_log_submit_bio(struct bio **biop, int opf);
  20extern void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh);
  21extern int gfs2_find_jhead(struct gfs2_jdesc *jd,
  22                           struct gfs2_log_header_host *head, bool keep_cache);
  23extern void gfs2_drain_revokes(struct gfs2_sbd *sdp);
  24static inline unsigned int buf_limit(struct gfs2_sbd *sdp)
  25{
  26        return sdp->sd_ldptrs;
  27}
  28
  29static inline unsigned int databuf_limit(struct gfs2_sbd *sdp)
  30{
  31        return sdp->sd_ldptrs / 2;
  32}
  33
  34static inline void lops_before_commit(struct gfs2_sbd *sdp,
  35                                      struct gfs2_trans *tr)
  36{
  37        int x;
  38        for (x = 0; gfs2_log_ops[x]; x++)
  39                if (gfs2_log_ops[x]->lo_before_commit)
  40                        gfs2_log_ops[x]->lo_before_commit(sdp, tr);
  41}
  42
  43static inline void lops_after_commit(struct gfs2_sbd *sdp,
  44                                     struct gfs2_trans *tr)
  45{
  46        int x;
  47        for (x = 0; gfs2_log_ops[x]; x++)
  48                if (gfs2_log_ops[x]->lo_after_commit)
  49                        gfs2_log_ops[x]->lo_after_commit(sdp, tr);
  50}
  51
  52static inline void lops_before_scan(struct gfs2_jdesc *jd,
  53                                    struct gfs2_log_header_host *head,
  54                                    unsigned int pass)
  55{
  56        int x;
  57        for (x = 0; gfs2_log_ops[x]; x++)
  58                if (gfs2_log_ops[x]->lo_before_scan)
  59                        gfs2_log_ops[x]->lo_before_scan(jd, head, pass);
  60}
  61
  62static inline int lops_scan_elements(struct gfs2_jdesc *jd, u32 start,
  63                                     struct gfs2_log_descriptor *ld,
  64                                     __be64 *ptr,
  65                                     unsigned int pass)
  66{
  67        int x, error;
  68        for (x = 0; gfs2_log_ops[x]; x++)
  69                if (gfs2_log_ops[x]->lo_scan_elements) {
  70                        error = gfs2_log_ops[x]->lo_scan_elements(jd, start,
  71                                                                  ld, ptr, pass);
  72                        if (error)
  73                                return error;
  74                }
  75
  76        return 0;
  77}
  78
  79static inline void lops_after_scan(struct gfs2_jdesc *jd, int error,
  80                                   unsigned int pass)
  81{
  82        int x;
  83        for (x = 0; gfs2_log_ops[x]; x++)
  84                if (gfs2_log_ops[x]->lo_before_scan)
  85                        gfs2_log_ops[x]->lo_after_scan(jd, error, pass);
  86}
  87
  88#endif /* __LOPS_DOT_H__ */
  89
  90