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author | Eric Van Hensbergen <ericvh@gmail.com> | 2005-09-09 20:04:20 (GMT) |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-09 20:57:56 (GMT) |
commit | 9e82cf6a802a72f0f447eb4c76d6a3fc8736a31d (patch) | |
tree | 69bab629bd530930470fded8f04ca57566680668 /fs/9p/v9fs_vfs.h | |
parent | 2bad8471511ce5cc3ea90d0940622bd4b56b9cce (diff) | |
download | linux-fsl-qoriq-9e82cf6a802a72f0f447eb4c76d6a3fc8736a31d.tar.xz |
[PATCH] v9fs: VFS superblock operations and glue
This part of the patch contains VFS superblock and mapping code.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/9p/v9fs_vfs.h')
-rw-r--r-- | fs/9p/v9fs_vfs.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/fs/9p/v9fs_vfs.h b/fs/9p/v9fs_vfs.h new file mode 100644 index 0000000..2f2cea7 --- /dev/null +++ b/fs/9p/v9fs_vfs.h @@ -0,0 +1,53 @@ +/* + * V9FS VFS extensions. + * + * Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com> + * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to: + * Free Software Foundation + * 51 Franklin Street, Fifth Floor + * Boston, MA 02111-1301 USA + * + */ + +/* plan9 semantics are that created files are implicitly opened. + * But linux semantics are that you call create, then open. + * the plan9 approach is superior as it provides an atomic + * open. + * we track the create fid here. When the file is opened, if fidopen is + * non-zero, we use the fid and can skip some steps. + * there may be a better way to do this, but I don't know it. + * one BAD way is to clunk the fid on create, then open it again: + * you lose the atomicity of file open + */ + +/* special case: + * unlink calls remove, which is an implicit clunk. So we have to track + * that kind of thing so that we don't try to clunk a dead fid. + */ + +extern struct file_system_type v9fs_fs_type; +extern struct file_operations v9fs_file_operations; +extern struct file_operations v9fs_dir_operations; +extern struct dentry_operations v9fs_dentry_operations; + +struct inode *v9fs_get_inode(struct super_block *sb, int mode); +ino_t v9fs_qid2ino(struct v9fs_qid *qid); +void v9fs_mistat2inode(struct v9fs_stat *, struct inode *, + struct super_block *); +int v9fs_dir_release(struct inode *inode, struct file *filp); +int v9fs_file_open(struct inode *inode, struct file *file); +void v9fs_inode2mistat(struct inode *inode, struct v9fs_stat *mistat); +void v9fs_dentry_release(struct dentry *); |