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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;
Sripathi Kodi9b6533c2010-03-25 12:41:54 +000043extern const struct file_operations v9fs_file_operations_dotl;
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -080044extern const struct file_operations v9fs_dir_operations;
Sripathi Kodi9b6533c2010-03-25 12:41:54 +000045extern const struct file_operations v9fs_dir_operations_dotl;
Al Viroa488257c2009-02-20 05:55:46 +000046extern const struct dentry_operations v9fs_dentry_operations;
47extern const struct dentry_operations v9fs_cached_dentry_operations;
Eric Van Hensbergen9e82cf62005-09-09 13:04:20 -070048
Abhishek Kulkarni60e78d22009-09-23 13:00:27 -050049#ifdef CONFIG_9P_FSCACHE
50struct inode *v9fs_alloc_inode(struct super_block *sb);
51void v9fs_destroy_inode(struct inode *inode);
52#endif
53
Eric Van Hensbergen9e82cf62005-09-09 13:04:20 -070054struct inode *v9fs_get_inode(struct super_block *sb, int mode);
Al Virob57922d2010-06-07 14:34:48 -040055void v9fs_evict_inode(struct inode *inode);
Latchesar Ionkovbd238fb2007-07-10 17:57:28 -050056ino_t v9fs_qid2ino(struct p9_qid *qid);
Eric Van Hensbergen51a87c52008-10-16 08:30:07 -050057void v9fs_stat2inode(struct p9_wstat *, struct inode *, struct super_block *);
Sripathi Kodif0853122010-07-12 20:07:23 +053058void v9fs_stat2inode_dotl(struct p9_stat_dotl *, struct inode *);
Eric Van Hensbergen9e82cf62005-09-09 13:04:20 -070059int v9fs_dir_release(struct inode *inode, struct file *filp);
60int v9fs_file_open(struct inode *inode, struct file *file);
Eric Van Hensbergen51a87c52008-10-16 08:30:07 -050061void v9fs_inode2stat(struct inode *inode, struct p9_wstat *stat);
Eric Van Hensbergen2e4bef42008-06-24 17:39:39 -050062int v9fs_uflags2omode(int uflags, int extended);
Eric Van Hensbergenfbedadc2008-10-13 20:36:16 -050063
64ssize_t v9fs_file_readn(struct file *, char *, char __user *, u32, u64);
M. Mohan Kumar7a4439c2010-02-08 15:36:48 -060065void v9fs_blank_wstat(struct p9_wstat *wstat);
Aneesh Kumar K.V22d8dcd2010-09-28 00:27:40 +053066int v9fs_vfs_setattr_dotl(struct dentry *, struct iattr *);
Venkateswararao Jujjuri (JV)b165d602010-10-22 10:13:12 -070067int v9fs_file_fsync_dotl(struct file *filp, int datasync);
M. Mohan Kumara0990272010-09-27 11:34:24 +053068
69#define P9_LOCK_TIMEOUT (30*HZ)