2019-05-28 16:57:16 +00:00
|
|
|
/* SPDX-License-Identifier: GPL-2.0-only */
|
2005-09-09 20:04:20 +00:00
|
|
|
/*
|
|
|
|
|
* V9FS VFS extensions.
|
|
|
|
|
*
|
|
|
|
|
* Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
|
|
|
|
|
* Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
|
|
|
|
|
*/
|
2011-02-28 11:34:09 +00:00
|
|
|
#ifndef FS_9P_V9FS_VFS_H
|
|
|
|
|
#define FS_9P_V9FS_VFS_H
|
2005-09-09 20:04:20 +00:00
|
|
|
|
|
|
|
|
/* 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.
|
|
|
|
|
*/
|
2011-02-28 11:34:09 +00:00
|
|
|
#define P9_LOCK_TIMEOUT (30*HZ)
|
2005-09-09 20:04:20 +00:00
|
|
|
|
2019-01-24 06:35:13 +00:00
|
|
|
/* flags for v9fs_stat2inode() & v9fs_stat2inode_dotl() */
|
|
|
|
|
#define V9FS_STAT2INODE_KEEP_ISIZE 1
|
|
|
|
|
|
2005-09-09 20:04:20 +00:00
|
|
|
extern struct file_system_type v9fs_fs_type;
|
2006-06-28 11:26:44 +00:00
|
|
|
extern const struct address_space_operations v9fs_addr_operations;
|
2006-03-28 09:56:42 +00:00
|
|
|
extern const struct file_operations v9fs_file_operations;
|
2010-03-25 12:41:54 +00:00
|
|
|
extern const struct file_operations v9fs_file_operations_dotl;
|
2006-03-28 09:56:42 +00:00
|
|
|
extern const struct file_operations v9fs_dir_operations;
|
2010-03-25 12:41:54 +00:00
|
|
|
extern const struct file_operations v9fs_dir_operations_dotl;
|
2009-02-20 05:55:46 +00:00
|
|
|
extern const struct dentry_operations v9fs_dentry_operations;
|
|
|
|
|
extern const struct dentry_operations v9fs_cached_dentry_operations;
|
2011-02-28 11:33:54 +00:00
|
|
|
extern const struct file_operations v9fs_cached_file_operations;
|
|
|
|
|
extern const struct file_operations v9fs_cached_file_operations_dotl;
|
2014-01-10 12:44:09 +00:00
|
|
|
extern const struct file_operations v9fs_mmap_file_operations;
|
|
|
|
|
extern const struct file_operations v9fs_mmap_file_operations_dotl;
|
2011-02-28 11:34:02 +00:00
|
|
|
extern struct kmem_cache *v9fs_inode_cache;
|
2005-09-09 20:04:20 +00:00
|
|
|
|
2009-09-23 18:00:27 +00:00
|
|
|
struct inode *v9fs_alloc_inode(struct super_block *sb);
|
2019-04-10 19:00:26 +00:00
|
|
|
void v9fs_free_inode(struct inode *inode);
|
2011-07-26 06:53:22 +00:00
|
|
|
struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t);
|
2011-02-28 11:34:01 +00:00
|
|
|
int v9fs_init_inode(struct v9fs_session_info *v9ses,
|
2011-07-26 06:53:22 +00:00
|
|
|
struct inode *inode, umode_t mode, dev_t);
|
2010-06-07 18:34:48 +00:00
|
|
|
void v9fs_evict_inode(struct inode *inode);
|
2007-07-10 22:57:28 +00:00
|
|
|
ino_t v9fs_qid2ino(struct p9_qid *qid);
|
2019-01-24 06:35:13 +00:00
|
|
|
void v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
|
|
|
|
|
struct super_block *sb, unsigned int flags);
|
|
|
|
|
void v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode,
|
|
|
|
|
unsigned int flags);
|
2005-09-09 20:04:20 +00:00
|
|
|
int v9fs_dir_release(struct inode *inode, struct file *filp);
|
|
|
|
|
int v9fs_file_open(struct inode *inode, struct file *file);
|
2008-10-16 13:30:07 +00:00
|
|
|
void v9fs_inode2stat(struct inode *inode, struct p9_wstat *stat);
|
2008-06-24 22:39:39 +00:00
|
|
|
int v9fs_uflags2omode(int uflags, int extended);
|
2008-10-14 01:36:16 +00:00
|
|
|
|
2010-02-08 21:36:48 +00:00
|
|
|
void v9fs_blank_wstat(struct p9_wstat *wstat);
|
2021-01-21 13:19:43 +00:00
|
|
|
int v9fs_vfs_setattr_dotl(struct user_namespace *, struct dentry *,
|
|
|
|
|
struct iattr *);
|
2011-07-17 00:44:56 +00:00
|
|
|
int v9fs_file_fsync_dotl(struct file *filp, loff_t start, loff_t end,
|
|
|
|
|
int datasync);
|
2011-02-28 11:34:06 +00:00
|
|
|
int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode);
|
|
|
|
|
int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode);
|
|
|
|
|
static inline void v9fs_invalidate_inode_attr(struct inode *inode)
|
|
|
|
|
{
|
|
|
|
|
struct v9fs_inode *v9inode;
|
|
|
|
|
v9inode = V9FS_I(inode);
|
|
|
|
|
v9inode->cache_validity |= V9FS_INO_INVALID_ATTR;
|
|
|
|
|
return;
|
|
|
|
|
}
|
2011-08-03 14:25:32 +00:00
|
|
|
|
|
|
|
|
int v9fs_open_to_dotl_flags(int flags);
|
2019-01-24 06:35:13 +00:00
|
|
|
|
|
|
|
|
static inline void v9fs_i_size_write(struct inode *inode, loff_t i_size)
|
|
|
|
|
{
|
|
|
|
|
/*
|
|
|
|
|
* 32-bit need the lock, concurrent updates could break the
|
|
|
|
|
* sequences and make i_size_read() loop forever.
|
|
|
|
|
* 64-bit updates are atomic and can skip the locking.
|
|
|
|
|
*/
|
|
|
|
|
if (sizeof(i_size) > sizeof(long))
|
|
|
|
|
spin_lock(&inode->i_lock);
|
|
|
|
|
i_size_write(inode, i_size);
|
|
|
|
|
if (sizeof(i_size) > sizeof(long))
|
|
|
|
|
spin_unlock(&inode->i_lock);
|
|
|
|
|
}
|
2011-02-28 11:34:09 +00:00
|
|
|
#endif
|
