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Eric Van Hensbergen3ed84912005-09-09 13:04:24 -07001/*
2 * V9FS FID Management
3 *
4 * Copyright (C) 2005 by Eric Van Hensbergen <ericvh@gmail.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
Eric Van Hensbergen42e8c502006-03-25 03:07:28 -08007 * it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation.
Eric Van Hensbergen3ed84912005-09-09 13:04:24 -07009 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to:
17 * Free Software Foundation
18 * 51 Franklin Street, Fifth Floor
19 * Boston, MA 02111-1301 USA
20 *
21 */
22
23#include <linux/list.h>
24
Eric Van Hensbergenee443992008-03-05 07:08:09 -060025/**
26 * struct v9fs_dentry - 9p private data stored in dentry d_fsdata
27 * @lock: protects the fidlist
28 * @fidlist: list of FIDs currently associated with this dentry
29 *
30 * This structure defines the 9p private data associated with
31 * a particular dentry. In particular, this private data is used
32 * to lookup which 9P FID handle should be used for a particular VFS
33 * operation. FID handles are associated with dentries instead of
34 * inodes in order to more closely map functionality to the Plan 9
35 * expected behavior for FID reclaimation and tracking.
36 *
37 * See Also: Mapping FIDs to Linux VFS model in
38 * Design and Implementation of the Linux 9P File System documentation
39 */
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -050040struct v9fs_dentry {
41 spinlock_t lock; /* protect fidlist */
42 struct list_head fidlist;
Eric Van Hensbergen3ed84912005-09-09 13:04:24 -070043};
44
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -050045struct p9_fid *v9fs_fid_lookup(struct dentry *dentry);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -050046struct p9_fid *v9fs_fid_clone(struct dentry *dentry);
47int v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid);