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 u64 gfs2_log_bmap(struct gfs2_sbd *sdp);
  22extern void gfs2_log_write(struct gfs2_sbd *sdp, struct page *page,
  23                           unsigned size, unsigned offset, u64 blkno);
  24extern void gfs2_log_write_page(struct gfs2_sbd *sdp, struct page *page);
  25extern void gfs2_log_submit_bio(struct bio **biop, int opf);
  26extern void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh);
  27extern int gfs2_find_jhead(struct gfs2_jdesc *jd,
  28                           struct gfs2_log_header_host *head, bool keep_cache);
  29
  30static 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
  38static 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
  46static 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
  55static 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
  64static 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
  74static 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
  91static 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
 102