/* -*- mode: c; c-basic-offset: 8; -*-
   * vim: noexpandtab sw=8 ts=8 sts=0:
   *
   * dcache.h
   *
   * Function prototypes
   *
   * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public
   * License as published by the Free Software Foundation; either
   * version 2 of the License, or (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * General Public License for more details.
   *
   * You should have received a copy of the GNU General Public
   * License along with this program; if not, write to the
   * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   * Boston, MA 021110-1307, USA.
   */
  
  #ifndef OCFS2_DCACHE_H
  #define OCFS2_DCACHE_H
  
  extern const struct dentry_operations ocfs2_dentry_ops;
  
  struct ocfs2_dentry_lock {
  	/* Use count of dentry lock */
  	unsigned int		dl_count;
  	union {
  		/* Linked list of dentry locks to release */
  		struct ocfs2_dentry_lock *dl_next;
  		u64			dl_parent_blkno;
  	};
  
  	/*
  	 * The ocfs2_dentry_lock keeps an inode reference until
  	 * dl_lockres has been destroyed. This is usually done in
  	 * ->d_iput() anyway, so there should be minimal impact.
  	 */
  	struct inode		*dl_inode;
  	struct ocfs2_lock_res	dl_lockres;
  };
  
  int ocfs2_dentry_attach_lock(struct dentry *dentry, struct inode *inode,
  			     u64 parent_blkno);
  
  extern spinlock_t dentry_list_lock;
  
  void ocfs2_dentry_lock_put(struct ocfs2_super *osb,
  			   struct ocfs2_dentry_lock *dl);
  
  void ocfs2_drop_dl_inodes(struct work_struct *work);
  void ocfs2_drop_all_dl_inodes(struct ocfs2_super *osb);
  
  struct dentry *ocfs2_find_local_alias(struct inode *inode, u64 parent_blkno,
  				      int skip_unhashed);
  
  void ocfs2_dentry_move(struct dentry *dentry, struct dentry *target,
  		       struct inode *old_dir, struct inode *new_dir);
  
  extern spinlock_t dentry_attach_lock;
  void ocfs2_dentry_attach_gen(struct dentry *dentry);
  
  #endif /* OCFS2_DCACHE_H */