LXR linux/fs/gfs2/log.h

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   4 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
   5 */
   6
   7#ifndef __LOG_DOT_H__
   8#define __LOG_DOT_H__
   9
  10#include <linux/list.h>
  11#include <linux/spinlock.h>
  12#include <linux/writeback.h>
  13#include "incore.h"
  14#include "inode.h"
  15
  16/*
  17 * The minimum amount of log space required for a log flush is one block for
  18 * revokes and one block for the log header.  Log flushes other than
  19 * GFS2_LOG_HEAD_FLUSH_NORMAL may write one or two more log headers.
  20 */
  21#define GFS2_LOG_FLUSH_MIN_BLOCKS 4
  22
  23/**
  24 * gfs2_log_lock - acquire the right to mess with the log manager
  25 * @sdp: the filesystem
  26 *
  27 */
  28
  29static inline void gfs2_log_lock(struct gfs2_sbd *sdp)
  30__acquires(&sdp->sd_log_lock)
  31{
  32        spin_lock(&sdp->sd_log_lock);
  33}
  34
  35/**
  36 * gfs2_log_unlock - release the right to mess with the log manager
  37 * @sdp: the filesystem
  38 *
  39 */
  40
  41static inline void gfs2_log_unlock(struct gfs2_sbd *sdp)
  42__releases(&sdp->sd_log_lock)
  43{
  44        spin_unlock(&sdp->sd_log_lock);
  45}
  46
  47static inline void gfs2_log_pointers_init(struct gfs2_sbd *sdp,
  48                                          unsigned int value)
  49{
  50        if (++value == sdp->sd_jdesc->jd_blocks) {
  51                value = 0;
  52        }
  53        sdp->sd_log_tail = value;
  54        sdp->sd_log_flush_tail = value;
  55        sdp->sd_log_head = value;
  56}
  57
  58static inline void gfs2_ordered_add_inode(struct gfs2_inode *ip)
  59{
  60        struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
  61
  62        if (gfs2_is_jdata(ip) || !gfs2_is_ordered(sdp))
  63                return;
  64
  65        if (list_empty(&ip->i_ordered)) {
  66                spin_lock(&sdp->sd_ordered_lock);
  67                if (list_empty(&ip->i_ordered))
  68                        list_add(&ip->i_ordered, &sdp->sd_log_ordered);
  69                spin_unlock(&sdp->sd_ordered_lock);
  70        }
  71}
  72
  73extern void gfs2_ordered_del_inode(struct gfs2_inode *ip);
  74extern unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct);
  75extern void gfs2_remove_from_ail(struct gfs2_bufdata *bd);
  76extern bool gfs2_log_is_empty(struct gfs2_sbd *sdp);
  77extern void gfs2_log_release_revokes(struct gfs2_sbd *sdp, unsigned int revokes);
  78extern void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks);
  79extern bool gfs2_log_try_reserve(struct gfs2_sbd *sdp, struct gfs2_trans *tr,
  80                                 unsigned int *extra_revokes);
  81extern void gfs2_log_reserve(struct gfs2_sbd *sdp, struct gfs2_trans *tr,
  82                             unsigned int *extra_revokes);
  83extern void gfs2_write_log_header(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd,
  84                                  u64 seq, u32 tail, u32 lblock, u32 flags,
  85                                  int op_flags);
  86extern void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl,
  87                           u32 type);
  88extern void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *trans);
  89extern void gfs2_ail1_flush(struct gfs2_sbd *sdp, struct writeback_control *wbc);
  90extern void log_flush_wait(struct gfs2_sbd *sdp);
  91
  92extern int gfs2_logd(void *data);
  93extern void gfs2_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd);
  94extern void gfs2_glock_remove_revoke(struct gfs2_glock *gl);
  95extern void gfs2_flush_revokes(struct gfs2_sbd *sdp);
  96extern void gfs2_ail_drain(struct gfs2_sbd *sdp);
  97
  98#endif /* __LOG_DOT_H__ */
  99