2 * linux/fs/9p/vfs_dentry.c
4 * This file contians vfs dentry ops for the 9P2000 protocol.
6 * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
7 * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2
11 * as published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to:
20 * Free Software Foundation
21 * 51 Franklin Street, Fifth Floor
22 * Boston, MA 02111-1301 USA
26 #include <linux/module.h>
27 #include <linux/errno.h>
29 #include <linux/file.h>
30 #include <linux/pagemap.h>
31 #include <linux/stat.h>
32 #include <linux/string.h>
33 #include <linux/inet.h>
34 #include <linux/namei.h>
35 #include <linux/idr.h>
36 #include <linux/sched.h>
37 #include <net/9p/9p.h>
38 #include <net/9p/client.h>
45 * v9fs_dentry_delete - called when dentry refcount equals 0
46 * @dentry: dentry in question
48 * By returning 1 here we should remove cacheing of unused
53 static int v9fs_dentry_delete(struct dentry *dentry)
55 P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_name.name,
62 * v9fs_cached_dentry_delete - called when dentry refcount equals 0
63 * @dentry: dentry in question
65 * Only return 1 if our inode is invalid. Only non-synthetic files
66 * (ones without mtime == 0) should be calling this function.
70 static int v9fs_cached_dentry_delete(struct dentry *dentry)
72 struct inode *inode = dentry->d_inode;
73 P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_name.name,
83 * v9fs_dentry_release - called when dentry is going to be freed
84 * @dentry: dentry that is being release
88 void v9fs_dentry_release(struct dentry *dentry)
90 struct v9fs_dentry *dent;
91 struct p9_fid *temp, *current_fid;
93 P9_DPRINTK(P9_DEBUG_VFS, " dentry: %s (%p)\n", dentry->d_name.name,
95 dent = dentry->d_fsdata;
97 list_for_each_entry_safe(current_fid, temp, &dent->fidlist,
99 p9_client_clunk(current_fid);
103 dentry->d_fsdata = NULL;
107 const struct dentry_operations v9fs_cached_dentry_operations = {
108 .d_delete = v9fs_cached_dentry_delete,
109 .d_release = v9fs_dentry_release,
112 const struct dentry_operations v9fs_dentry_operations = {
113 .d_delete = v9fs_dentry_delete,
114 .d_release = v9fs_dentry_release,