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