1/*
2 * V9FS definitions.
3 *
4 *  Copyright (C) 2004 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  * Idpool structure provides lock and id management
26  *
27  */
28
29struct v9fs_idpool {
30	struct semaphore lock;
31	struct idr pool;
32};
33
34/*
35  * Session structure provides information for an opened session
36  *
37  */
38
39struct v9fs_session_info {
40	/* options */
41	unsigned int maxdata;
42	unsigned char extended;	/* set to 1 if we are using UNIX extensions */
43	unsigned char nodev;	/* set to 1 if no disable device mapping */
44	unsigned short port;	/* port to connect to */
45	unsigned short debug;	/* debug level */
46	unsigned short proto;	/* protocol to use */
47	unsigned int afid;	/* authentication fid */
48	unsigned int rfdno;	/* read file descriptor number */
49	unsigned int wfdno;	/* write file descriptor number */
50	unsigned int cache;	/* cache mode */
51
52	char *name;		/* user name to mount as */
53	char *remotename;	/* name of remote hierarchy being mounted */
54	unsigned int uid;	/* default uid/muid for legacy support */
55	unsigned int gid;	/* default gid for legacy support */
56
57	/* book keeping */
58	struct v9fs_idpool fidpool;	/* The FID pool for file descriptors */
59
60	struct v9fs_transport *transport;
61	struct v9fs_mux_data *mux;
62
63	int inprogress;		/* session in progress => true */
64	int shutdown;		/* session shutting down. no more attaches. */
65	unsigned char session_hung;
66	struct dentry *debugfs_dir;
67};
68
69/* possible values of ->proto */
70enum {
71	PROTO_TCP,
72	PROTO_UNIX,
73	PROTO_FD,
74};
75
76/* possible values of ->cache */
77/* eventually support loose, tight, time, session, default always none */
78enum {
79	CACHE_NONE,		/* default */
80	CACHE_LOOSE,		/* no consistency */
81};
82
83extern struct dentry *v9fs_debugfs_root;
84
85int v9fs_session_init(struct v9fs_session_info *, const char *, char *);
86struct v9fs_session_info *v9fs_inode2v9ses(struct inode *);
87void v9fs_session_close(struct v9fs_session_info *v9ses);
88int v9fs_get_idpool(struct v9fs_idpool *p);
89void v9fs_put_idpool(int id, struct v9fs_idpool *p);
90int v9fs_check_idpool(int id, struct v9fs_idpool *p);
91void v9fs_session_cancel(struct v9fs_session_info *v9ses);
92
93#define V9FS_MAGIC 0x01021997
94
95/* other default globals */
96#define V9FS_PORT		564
97#define V9FS_DEFUSER	"nobody"
98#define V9FS_DEFANAME	""
99