blob: 2f2cea7ee3e7123fcdedac046c191e24cf227c67 [file] [log] [blame]
Eric Van Hensbergen9e82cf62005-09-09 13:04:20 -07001/*
2 * V9FS VFS extensions.
3 *
4 * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
5 * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to:
19 * Free Software Foundation
20 * 51 Franklin Street, Fifth Floor
21 * Boston, MA 02111-1301 USA
22 *
23 */
24
25/* plan9 semantics are that created files are implicitly opened.
26 * But linux semantics are that you call create, then open.
27 * the plan9 approach is superior as it provides an atomic
28 * open.
29 * we track the create fid here. When the file is opened, if fidopen is
30 * non-zero, we use the fid and can skip some steps.
31 * there may be a better way to do this, but I don't know it.
32 * one BAD way is to clunk the fid on create, then open it again:
33 * you lose the atomicity of file open
34 */
35
36/* special case:
37 * unlink calls remove, which is an implicit clunk. So we have to track
38 * that kind of thing so that we don't try to clunk a dead fid.
39 */
40
41extern struct file_system_type v9fs_fs_type;
42extern struct file_operations v9fs_file_operations;
43extern struct file_operations v9fs_dir_operations;
44extern struct dentry_operations v9fs_dentry_operations;
45
46struct inode *v9fs_get_inode(struct super_block *sb, int mode);
47ino_t v9fs_qid2ino(struct v9fs_qid *qid);
48void v9fs_mistat2inode(struct v9fs_stat *, struct inode *,
49 struct super_block *);
50int v9fs_dir_release(struct inode *inode, struct file *filp);
51int v9fs_file_open(struct inode *inode, struct file *file);
52void v9fs_inode2mistat(struct inode *inode, struct v9fs_stat *mistat);
53void v9fs_dentry_release(struct dentry *);