| 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 |
| 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 | |
| 41 | extern struct file_system_type v9fs_fs_type; |
| 42 | extern struct file_operations v9fs_file_operations; |
| 43 | extern struct file_operations v9fs_dir_operations; |
| 44 | extern struct dentry_operations v9fs_dentry_operations; |
| 45 | |
| 46 | struct inode *v9fs_get_inode(struct super_block *sb, int mode); |
| 47 | ino_t v9fs_qid2ino(struct v9fs_qid *qid); |
| 48 | void v9fs_mistat2inode(struct v9fs_stat *, struct inode *, |
| 49 | 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_inode2mistat(struct inode *inode, struct v9fs_stat *mistat); |
| 53 | void v9fs_dentry_release(struct dentry *); |