Root/fs/ocfs2/dcache.h

1/* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * dcache.h
5 *
6 * Function prototypes
7 *
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 021110-1307, USA.
24 */
25
26#ifndef OCFS2_DCACHE_H
27#define OCFS2_DCACHE_H
28
29extern const struct dentry_operations ocfs2_dentry_ops;
30
31struct ocfs2_dentry_lock {
32    /* Use count of dentry lock */
33    unsigned int dl_count;
34    union {
35        /* Linked list of dentry locks to release */
36        struct ocfs2_dentry_lock *dl_next;
37        u64 dl_parent_blkno;
38    };
39
40    /*
41     * The ocfs2_dentry_lock keeps an inode reference until
42     * dl_lockres has been destroyed. This is usually done in
43     * ->d_iput() anyway, so there should be minimal impact.
44     */
45    struct inode *dl_inode;
46    struct ocfs2_lock_res dl_lockres;
47};
48
49int ocfs2_dentry_attach_lock(struct dentry *dentry, struct inode *inode,
50                 u64 parent_blkno);
51
52extern spinlock_t dentry_list_lock;
53
54void ocfs2_dentry_lock_put(struct ocfs2_super *osb,
55               struct ocfs2_dentry_lock *dl);
56
57void ocfs2_drop_dl_inodes(struct work_struct *work);
58void ocfs2_drop_all_dl_inodes(struct ocfs2_super *osb);
59
60struct dentry *ocfs2_find_local_alias(struct inode *inode, u64 parent_blkno,
61                      int skip_unhashed);
62
63void ocfs2_dentry_move(struct dentry *dentry, struct dentry *target,
64               struct inode *old_dir, struct inode *new_dir);
65
66extern spinlock_t dentry_attach_lock;
67
68#endif /* OCFS2_DCACHE_H */
69

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