xref: /openbmc/linux/fs/ocfs2/dcache.h (revision c4a54f70)
1  /* SPDX-License-Identifier: GPL-2.0-or-later */
2  /* -*- mode: c; c-basic-offset: 8; -*-
3   * vim: noexpandtab sw=8 ts=8 sts=0:
4   *
5   * dcache.h
6   *
7   * Function prototypes
8   *
9   * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
10   */
11  
12  #ifndef OCFS2_DCACHE_H
13  #define OCFS2_DCACHE_H
14  
15  extern const struct dentry_operations ocfs2_dentry_ops;
16  
17  struct ocfs2_dentry_lock {
18  	unsigned int		dl_count;
19  	u64			dl_parent_blkno;
20  
21  	/*
22  	 * The ocfs2_dentry_lock keeps an inode reference until
23  	 * dl_lockres has been destroyed. This is usually done in
24  	 * ->d_iput() anyway, so there should be minimal impact.
25  	 */
26  	struct inode		*dl_inode;
27  	struct ocfs2_lock_res	dl_lockres;
28  };
29  
30  int ocfs2_dentry_attach_lock(struct dentry *dentry, struct inode *inode,
31  			     u64 parent_blkno);
32  
33  void ocfs2_dentry_lock_put(struct ocfs2_super *osb,
34  			   struct ocfs2_dentry_lock *dl);
35  
36  struct dentry *ocfs2_find_local_alias(struct inode *inode, u64 parent_blkno,
37  				      int skip_unhashed);
38  
39  void ocfs2_dentry_move(struct dentry *dentry, struct dentry *target,
40  		       struct inode *old_dir, struct inode *new_dir);
41  
42  extern spinlock_t dentry_attach_lock;
43  void ocfs2_dentry_attach_gen(struct dentry *dentry);
44  
45  #endif /* OCFS2_DCACHE_H */
46