1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * V9FS FID Management
4  *
5  *  Copyright (C) 2005 by Eric Van Hensbergen <ericvh@gmail.com>
6  */
7 #ifndef FS_9P_FID_H
8 #define FS_9P_FID_H
9 #include <linux/list.h>
10 
11 struct p9_fid *v9fs_fid_lookup(struct dentry *dentry);
v9fs_parent_fid(struct dentry * dentry)12 static inline struct p9_fid *v9fs_parent_fid(struct dentry *dentry)
13 {
14 	return v9fs_fid_lookup(dentry->d_parent);
15 }
16 void v9fs_fid_add(struct dentry *dentry, struct p9_fid **fid);
17 struct p9_fid *v9fs_writeback_fid(struct dentry *dentry);
18 void v9fs_open_fid_add(struct inode *inode, struct p9_fid **fid);
clone_fid(struct p9_fid * fid)19 static inline struct p9_fid *clone_fid(struct p9_fid *fid)
20 {
21 	return IS_ERR(fid) ? fid :  p9_client_walk(fid, 0, NULL, 1);
22 }
v9fs_fid_clone(struct dentry * dentry)23 static inline struct p9_fid *v9fs_fid_clone(struct dentry *dentry)
24 {
25 	struct p9_fid *fid, *nfid;
26 
27 	fid = v9fs_fid_lookup(dentry);
28 	if (!fid || IS_ERR(fid))
29 		return fid;
30 
31 	nfid = clone_fid(fid);
32 	p9_fid_put(fid);
33 	return nfid;
34 }
35 #endif
36