Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 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 |
Eric Van Hensbergen | 42e8c50 | 2006-03-25 03:07:28 -0800 | [diff] [blame] | 8 | * it under the terms of the GNU General Public License version 2 |
| 9 | * as published by the Free Software Foundation. |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 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; |
Christoph Hellwig | f5e54d6 | 2006-06-28 04:26:44 -0700 | [diff] [blame] | 41 | extern const struct address_space_operations v9fs_addr_operations; |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 42 | extern const struct file_operations v9fs_file_operations; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 43 | extern const struct file_operations v9fs_file_operations_dotl; |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 44 | extern const struct file_operations v9fs_dir_operations; |
Sripathi Kodi | 9b6533c | 2010-03-25 12:41:54 +0000 | [diff] [blame] | 45 | extern const struct file_operations v9fs_dir_operations_dotl; |
Al Viro | a488257c | 2009-02-20 05:55:46 +0000 | [diff] [blame] | 46 | extern const struct dentry_operations v9fs_dentry_operations; |
| 47 | extern const struct dentry_operations v9fs_cached_dentry_operations; |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 48 | |
Abhishek Kulkarni | 60e78d2 | 2009-09-23 13:00:27 -0500 | [diff] [blame] | 49 | #ifdef CONFIG_9P_FSCACHE |
| 50 | struct inode *v9fs_alloc_inode(struct super_block *sb); |
| 51 | void v9fs_destroy_inode(struct inode *inode); |
| 52 | #endif |
| 53 | |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 54 | struct inode *v9fs_get_inode(struct super_block *sb, int mode); |
Al Viro | b57922d | 2010-06-07 14:34:48 -0400 | [diff] [blame] | 55 | void v9fs_evict_inode(struct inode *inode); |
Latchesar Ionkov | bd238fb | 2007-07-10 17:57:28 -0500 | [diff] [blame] | 56 | ino_t v9fs_qid2ino(struct p9_qid *qid); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 57 | void v9fs_stat2inode(struct p9_wstat *, struct inode *, struct super_block *); |
Sripathi Kodi | f085312 | 2010-07-12 20:07:23 +0530 | [diff] [blame] | 58 | void v9fs_stat2inode_dotl(struct p9_stat_dotl *, struct inode *); |
Eric Van Hensbergen | 9e82cf6 | 2005-09-09 13:04:20 -0700 | [diff] [blame] | 59 | int v9fs_dir_release(struct inode *inode, struct file *filp); |
| 60 | int v9fs_file_open(struct inode *inode, struct file *file); |
Eric Van Hensbergen | 51a87c5 | 2008-10-16 08:30:07 -0500 | [diff] [blame] | 61 | void v9fs_inode2stat(struct inode *inode, struct p9_wstat *stat); |
Eric Van Hensbergen | 2e4bef4 | 2008-06-24 17:39:39 -0500 | [diff] [blame] | 62 | int v9fs_uflags2omode(int uflags, int extended); |
Eric Van Hensbergen | fbedadc | 2008-10-13 20:36:16 -0500 | [diff] [blame] | 63 | |
| 64 | ssize_t v9fs_file_readn(struct file *, char *, char __user *, u32, u64); |
M. Mohan Kumar | 7a4439c | 2010-02-08 15:36:48 -0600 | [diff] [blame] | 65 | void v9fs_blank_wstat(struct p9_wstat *wstat); |
Aneesh Kumar K.V | 22d8dcd | 2010-09-28 00:27:40 +0530 | [diff] [blame] | 66 | int v9fs_vfs_setattr_dotl(struct dentry *, struct iattr *); |
Venkateswararao Jujjuri (JV) | b165d60 | 2010-10-22 10:13:12 -0700 | [diff] [blame] | 67 | int v9fs_file_fsync_dotl(struct file *filp, int datasync); |
M. Mohan Kumar | a099027 | 2010-09-27 11:34:24 +0530 | [diff] [blame] | 68 | |
| 69 | #define P9_LOCK_TIMEOUT (30*HZ) |