blob: 3a7560e358657f059897e6f27aaa3ce4a20c0953 [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
Eric Van Hensbergen42e8c502006-03-25 03:07:28 -08008 * it under the terms of the GNU General Public License version 2
9 * as published by the Free Software Foundation.
Eric Van Hensbergen9e82cf62005-09-09 13:04:20 -070010 *
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
40extern struct file_system_type v9fs_fs_type;
Christoph Hellwigf5e54d62006-06-28 04:26:44 -070041extern const struct address_space_operations v9fs_addr_operations;
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -080042extern const struct file_operations v9fs_file_operations;
43extern const struct file_operations v9fs_dir_operations;
Al Viroa488257c2009-02-20 05:55:46 +000044extern const struct dentry_operations v9fs_dentry_operations;
45extern const struct dentry_operations v9fs_cached_dentry_operations;
Eric Van Hensbergen9e82cf62005-09-09 13:04:20 -070046
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -050047#ifdef CONFIG_9P_FSCACHE
48struct inode *v9fs_alloc_inode(struct super_block *sb);
49void v9fs_destroy_inode(struct inode *inode);
50#endif
51
Eric Van Hensbergen9e82cf62005-09-09 13:04:20 -070052struct inode *v9fs_get_inode(struct super_block *sb, int mode);
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -050053void v9fs_clear_inode(struct inode *inode);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -050054ino_t v9fs_qid2ino(struct p9_qid *qid);
Eric Van Hensbergen51a87c52008-10-16 08:30:07 -050055void v9fs_stat2inode(struct p9_wstat *, struct inode *, struct super_block *);
Eric Van Hensbergen9e82cf62005-09-09 13:04:20 -070056int v9fs_dir_release(struct inode *inode, struct file *filp);
57int v9fs_file_open(struct inode *inode, struct file *file);
Eric Van Hensbergen51a87c52008-10-16 08:30:07 -050058void v9fs_inode2stat(struct inode *inode, struct p9_wstat *stat);
Eric Van Hensbergen9e82cf62005-09-09 13:04:20 -070059void v9fs_dentry_release(struct dentry *);
Eric Van Hensbergen2e4bef42008-06-24 17:39:39 -050060int v9fs_uflags2omode(int uflags, int extended);
Eric Van Hensbergenfbedadc2008-10-13 20:36:16 -050061
62ssize_t v9fs_file_readn(struct file *, char *, char __user *, u32, u64);