drivers/usb/core/hub.c: fix CONFIG_USB_OTG=y build
[linux-2.6/mini2440.git] / fs / 9p / fid.h
blobc3bbd6af996dbb88a1aaeb5b20e5e167ff6589a1
1 /*
2 * V9FS FID Management
4 * Copyright (C) 2005 by Eric Van Hensbergen <ericvh@gmail.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2
8 * as published by the Free Software Foundation.
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.
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
23 #include <linux/list.h>
25 /**
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
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.
37 * See Also: Mapping FIDs to Linux VFS model in
38 * Design and Implementation of the Linux 9P File System documentation
40 struct v9fs_dentry {
41 spinlock_t lock; /* protect fidlist */
42 struct list_head fidlist;
45 struct p9_fid *v9fs_fid_lookup(struct dentry *dentry);
46 struct p9_fid *v9fs_fid_clone(struct dentry *dentry);
47 int v9fs_fid_add(struct dentry *dentry, struct p9_fid *fid);