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
  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
  20extern const struct gfs2_log_operations *gfs2_log_ops[];
  21extern void gfs2_log_incr_head(struct gfs2_sbd *sdp);
  22extern u64 gfs2_log_bmap(struct gfs2_jdesc *jd, unsigned int lbn);
  23extern void gfs2_log_write(struct gfs2_sbd *sdp, struct page *page,
  24                           unsigned size, unsigned offset, u64 blkno);
  25extern void gfs2_log_write_page(struct gfs2_sbd *sdp, struct page *page);
  26extern void gfs2_log_submit_bio(struct bio **biop, int opf);
  27extern void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh);
  28extern int gfs2_find_jhead(struct gfs2_jdesc *jd,
  29                           struct gfs2_log_header_host *head, bool keep_cache);
  30
  31static inline unsigned int buf_limit(struct gfs2_sbd *sdp)
  32{
  33        unsigned int limit;
  34
  35        limit = (sdp->sd_sb.sb_bsize - BUF_OFFSET) / sizeof(__be64);
  36        return limit;
  37}
  38
  39static inline unsigned int databuf_limit(struct gfs2_sbd *sdp)
  40{
  41        unsigned int limit;
  42
  43        limit = (sdp->sd_sb.sb_bsize - DATABUF_OFFSET) / (2 * sizeof(__be64));
  44        return limit;
  45}
  46
  47static inline void lops_before_commit(struct gfs2_sbd *sdp,
  48                                      struct gfs2_trans *tr)
  49{
  50        int x;
  51        for (x = 0; gfs2_log_ops[x]; x++)
  52                if (gfs2_log_ops[x]->lo_before_commit)
  53                        gfs2_log_ops[x]->lo_before_commit(sdp, tr);
  54}
  55
  56static inline void lops_after_commit(struct gfs2_sbd *sdp,
  57                                     struct gfs2_trans *tr)
  58{
  59        int x;
  60        for (x = 0; gfs2_log_ops[x]; x++)
  61                if (gfs2_log_ops[x]->lo_after_commit)
  62                        gfs2_log_ops[x]->lo_after_commit(sdp, tr);
  63}
  64
  65static inline void lops_before_scan(struct gfs2_jdesc *jd,
  66                                    struct gfs2_log_header_host *head,
  67                                    unsigned int pass)
  68{
  69        int x;
  70        for (x = 0; gfs2_log_ops[x]; x++)
  71                if (gfs2_log_ops[x]->lo_before_scan)
  72                        gfs2_log_ops[x]->lo_before_scan(jd, head, pass);
  73}
  74
  75static inline int lops_scan_elements(struct gfs2_jdesc *jd, u32 start,
  76                                     struct gfs2_log_descriptor *ld,
  77                                     __be64 *ptr,
  78                                     unsigned int pass)
  79{
  80        int x, error;
  81        for (x = 0; gfs2_log_ops[x]; x++)
  82                if (gfs2_log_ops[x]->lo_scan_elements) {
  83                        error = gfs2_log_ops[x]->lo_scan_elements(jd, start,
  84                                                                  ld, ptr, pass);
  85                        if (error)
  86                                return error;
  87                }
  88
  89        return 0;
  90}
  91
  92static inline void lops_after_scan(struct gfs2_jdesc *jd, int error,
  93                                   unsigned int pass)
  94{
  95        int x;
  96        for (x = 0; gfs2_log_ops[x]; x++)
  97                if (gfs2_log_ops[x]->lo_before_scan)
  98                        gfs2_log_ops[x]->lo_after_scan(jd, error, pass);
  99}
 100
 101#endif /* __LOPS_DOT_H__ */
 102
 103