/*
   * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.

   * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.

   *
   * This copyrighted material is made available to anyone wishing to use,
   * modify, copy, or redistribute it subject to the terms and conditions

   * of the GNU General Public License version 2.

   */
  
  #ifndef __LOG_DOT_H__
  #define __LOG_DOT_H__

  #include <linux/list.h>
  #include <linux/spinlock.h>

  #include <linux/writeback.h>

  #include "incore.h"

  /**
   * gfs2_log_lock - acquire the right to mess with the log manager
   * @sdp: the filesystem
   *
   */
  
  static inline void gfs2_log_lock(struct gfs2_sbd *sdp)

  __acquires(&sdp->sd_log_lock)

  {
  	spin_lock(&sdp->sd_log_lock);
  }
  
  /**
   * gfs2_log_unlock - release the right to mess with the log manager
   * @sdp: the filesystem
   *
   */
  
  static inline void gfs2_log_unlock(struct gfs2_sbd *sdp)

  __releases(&sdp->sd_log_lock)

  {
  	spin_unlock(&sdp->sd_log_lock);
  }
  
  static inline void gfs2_log_pointers_init(struct gfs2_sbd *sdp,
  					  unsigned int value)
  {
  	if (++value == sdp->sd_jdesc->jd_blocks) {
  		value = 0;

  	}
  	sdp->sd_log_head = sdp->sd_log_tail = value;
  }

  extern unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct,

  			    unsigned int ssize);

  extern int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks);
  extern void gfs2_log_incr_head(struct gfs2_sbd *sdp);

  extern struct buffer_head *gfs2_log_get_buf(struct gfs2_sbd *sdp);
  extern struct buffer_head *gfs2_log_fake_buf(struct gfs2_sbd *sdp,

  				      struct buffer_head *real);

  extern void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl);
  extern void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *trans);
  extern void gfs2_remove_from_ail(struct gfs2_bufdata *bd);

  extern void gfs2_ail1_flush(struct gfs2_sbd *sdp, struct writeback_control *wbc);

  extern void gfs2_log_shutdown(struct gfs2_sbd *sdp);
  extern void gfs2_meta_syncfs(struct gfs2_sbd *sdp);
  extern int gfs2_logd(void *data);

  
  #endif /* __LOG_DOT_H__ */