xref: /openbmc/linux/fs/9p/fid.h (revision d5cb9783536a41df9f9cba5b0a1d78047ed787f7)
1 /*
2  * V9FS FID Management
3  *
4  *  Copyright (C) 2005 by Eric Van Hensbergen <ericvh@gmail.com>
5  *
6  *  This program is free software; you can redistribute it and/or modify
7  *  it under the terms of the GNU General Public License as published by
8  *  the Free Software Foundation; either version 2 of the License, or
9  *  (at your option) any later version.
10  *
11  *  This program is distributed in the hope that it will be useful,
12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *  GNU General Public License for more details.
15  *
16  *  You should have received a copy of the GNU General Public License
17  *  along with this program; if not, write to:
18  *  Free Software Foundation
19  *  51 Franklin Street, Fifth Floor
20  *  Boston, MA  02111-1301  USA
21  *
22  */
23 
24 #include <linux/list.h>
25 
26 #define FID_OP   0
27 #define FID_WALK 1
28 #define FID_CREATE 2
29 
30 struct v9fs_fid {
31 	struct list_head list;	 /* list of fids associated with a dentry */
32 	struct list_head active; /* XXX - debug */
33 
34 	u32 fid;
35 	unsigned char fidopen;	  /* set when fid is opened */
36 	unsigned char fidcreate;  /* set when fid was just created */
37 	unsigned char fidclunked; /* set when fid has already been clunked */
38 
39 	struct v9fs_qid qid;
40 	u32 iounit;
41 
42 	/* readdir stuff */
43 	int rdir_fpos;
44 	loff_t rdir_pos;
45 	struct v9fs_fcall *rdir_fcall;
46 
47 	/* management stuff */
48 	pid_t pid;		/* thread associated with this fid */
49 	uid_t uid;		/* user associated with this fid */
50 
51 	/* private data */
52 	struct file *filp;	/* backpointer to File struct for open files */
53 	struct v9fs_session_info *v9ses;	/* session info for this FID */
54 };
55 
56 struct v9fs_fid *v9fs_fid_lookup(struct dentry *dentry);
57 struct v9fs_fid *v9fs_fid_get_created(struct dentry *);
58 void v9fs_fid_destroy(struct v9fs_fid *fid);
59 struct v9fs_fid *v9fs_fid_create(struct dentry *,
60 	struct v9fs_session_info *v9ses, int fid, int create);
61