You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
70 lines
2.9 KiB
70 lines
2.9 KiB
/*
|
|
* 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 version 2
|
|
* as published by the Free Software Foundation.
|
|
*
|
|
* 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 const struct address_space_operations v9fs_addr_operations;
|
|
extern const struct file_operations v9fs_file_operations;
|
|
extern const struct file_operations v9fs_file_operations_dotl;
|
|
extern const struct file_operations v9fs_dir_operations;
|
|
extern const struct file_operations v9fs_dir_operations_dotl;
|
|
extern const struct dentry_operations v9fs_dentry_operations;
|
|
extern const struct dentry_operations v9fs_cached_dentry_operations;
|
|
|
|
#ifdef CONFIG_9P_FSCACHE
|
|
struct inode *v9fs_alloc_inode(struct super_block *sb);
|
|
void v9fs_destroy_inode(struct inode *inode);
|
|
#endif
|
|
|
|
struct inode *v9fs_get_inode(struct super_block *sb, int mode);
|
|
void v9fs_evict_inode(struct inode *inode);
|
|
ino_t v9fs_qid2ino(struct p9_qid *qid);
|
|
void v9fs_stat2inode(struct p9_wstat *, struct inode *, struct super_block *);
|
|
void v9fs_stat2inode_dotl(struct p9_stat_dotl *, struct inode *);
|
|
int v9fs_dir_release(struct inode *inode, struct file *filp);
|
|
int v9fs_file_open(struct inode *inode, struct file *file);
|
|
void v9fs_inode2stat(struct inode *inode, struct p9_wstat *stat);
|
|
void v9fs_dentry_release(struct dentry *);
|
|
int v9fs_uflags2omode(int uflags, int extended);
|
|
|
|
ssize_t v9fs_file_readn(struct file *, char *, char __user *, u32, u64);
|
|
void v9fs_blank_wstat(struct p9_wstat *wstat);
|
|
int v9fs_vfs_setattr_dotl(struct dentry *, struct iattr *);
|
|
int v9fs_file_fsync_dotl(struct file *filp, int datasync);
|
|
|
|
#define P9_LOCK_TIMEOUT (30*HZ)
|
|
|