1 /*
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 version 2
9 * as published by the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to:
18 * Free Software Foundation
19 * 51 Franklin Street, Fifth Floor
20 * Boston, MA 02111-1301 USA
21 *
22 */
23
24 /* plan9 semantics are that created files are implicitly opened.
25 * But linux semantics are that you call create, then open.
26 * the plan9 approach is superior as it provides an atomic
27 * open.
28 * we track the create fid here. When the file is opened, if fidopen is
29 * non-zero, we use the fid and can skip some steps.
30 * there may be a better way to do this, but I don't know it.
31 * one BAD way is to clunk the fid on create, then open it again:
32 * you lose the atomicity of file open
33 */
34
35 /* special case:
36 * unlink calls remove, which is an implicit clunk. So we have to track
37 * that kind of thing so that we don't try to clunk a dead fid.
38 */
39
40 extern struct file_system_type v9fs_fs_type;
41 extern const struct address_space_operations v9fs_addr_operations;
42 extern const struct file_operations v9fs_file_operations;
43 extern const struct file_operations v9fs_dir_operations;
44 extern struct dentry_operations v9fs_dentry_operations;
45 extern struct dentry_operations v9fs_cached_dentry_operations;
46
47 struct inode *v9fs_get_inode(struct super_block *sb, int mode);
48 ino_t v9fs_qid2ino(struct p9_qid *qid);
49 void v9fs_stat2inode(struct p9_stat *, struct inode *, struct super_block *);
50 int v9fs_dir_release(struct inode *inode, struct file *filp);
51 int v9fs_file_open(struct inode *inode, struct file *file);
52 void v9fs_inode2stat(struct inode *inode, struct p9_stat *stat);
53 void v9fs_dentry_release(struct dentry *);
54 int v9fs_uflags2omode(int uflags);
55
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