text: /*
   * 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;
  }
  
  static inline void gfs2_ordered_add_inode(struct gfs2_inode *ip)
  {
  	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
  
  	if (!test_bit(GIF_ORDERED, &ip->i_flags)) {
  		spin_lock(&sdp->sd_ordered_lock);
  		if (!test_and_set_bit(GIF_ORDERED, &ip->i_flags))
  			list_add(&ip->i_ordered, &sdp->sd_log_le_ordered);
  		spin_unlock(&sdp->sd_ordered_lock);
  	}
  }
  extern void gfs2_ordered_del_inode(struct gfs2_inode *ip);
  extern unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct,
  			    unsigned int ssize);
  
  extern void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks);
  extern int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks);
  enum gfs2_flush_type {
  	NORMAL_FLUSH = 0,
  	SYNC_FLUSH,
  	SHUTDOWN_FLUSH,
  	FREEZE_FLUSH
  };
  extern void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl,
  			   enum gfs2_flush_type type);
  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 int gfs2_logd(void *data);
  extern void gfs2_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd);
  extern void gfs2_write_revokes(struct gfs2_sbd *sdp);
  
  #endif /* __LOG_DOT_H__ */
  