1 /*
2 * V9FS definitions.
3 *
4 * Copyright (C) 2004-2008 by Eric Van Hensbergen <ericvh@gmail.com>
5 * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2
9 * as published by the Free Software Foundation.
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 /*
25 * Session structure provides information for an opened session
26 *
27 */
28
29 struct v9fs_session_info {
30 /* options */
31 unsigned char flags; /* session flags */
32 unsigned char nodev; /* set to 1 if no disable device mapping */
33 unsigned short debug; /* debug level */
34 unsigned int afid; /* authentication fid */
35 unsigned int cache; /* cache mode */
36
37 char *options; /* copy of mount options */
38 char *uname; /* user name to mount as */
39 char *aname; /* name of remote hierarchy being mounted */
40 unsigned int maxdata; /* max data for client interface */
41 unsigned int dfltuid; /* default uid/muid for legacy support */
42 unsigned int dfltgid; /* default gid for legacy support */
43 u32 uid; /* if ACCESS_SINGLE, the uid that has access */
44 struct p9_client *clnt; /* 9p client */
45 struct dentry *debugfs_dir;
46 };
47
48 /* session flags */
49 enum {
50 V9FS_EXTENDED = 0x01, /* 9P2000.u */
51 V9FS_ACCESS_MASK = 0x06, /* access mask */
52 V9FS_ACCESS_SINGLE = 0x02, /* only one user can access the files */
53 V9FS_ACCESS_USER = 0x04, /* attache per user */
54 V9FS_ACCESS_ANY = 0x06, /* use the same attach for all users */
55 };
56
57 /* possible values of ->cache */
58 /* eventually support loose, tight, time, session, default always none */
59 enum {
60 CACHE_NONE, /* default */
61 CACHE_LOOSE, /* no consistency */
62 };
63
64 extern struct dentry *v9fs_debugfs_root;
65
66 struct p9_fid *v9fs_session_init(struct v9fs_session_info *, const char *,
67 char *);
68 void v9fs_session_close(struct v9fs_session_info *v9ses);
69 void v9fs_session_cancel(struct v9fs_session_info *v9ses);
70
71 #define V9FS_MAGIC 0x01021997
72
73 /* other default globals */
74 #define V9FS_PORT 564
75 #define V9FS_DEFUSER "nobody"
76 #define V9FS_DEFANAME ""
77 #define V9FS_DEFUID (-2)
78 #define V9FS_DEFGID (-2)
79
80 static inline struct v9fs_session_info *v9fs_inode2v9ses(struct inode *inode)
81 {
82 return (inode->i_sb->s_fs_info);
83 }
84
85 static inline int v9fs_extended(struct v9fs_session_info *v9ses)
86 {
87 return v9ses->flags & V9FS_EXTENDED;
88 }
89
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