/*
* V9FS definitions.
*
* Copyright (C) 2004-2008 by Eric Van Hensbergen <ericvh@gmail.com>
* Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to:
* Free Software Foundation
* 51 Franklin Street, Fifth Floor
* Boston, MA 02111-1301 USA
*
*/
/*
* Session structure provides information for an opened session
*
*/
struct v9fs_session_info {
/* options */
unsigned char flags; /* session flags */
unsigned char nodev; /* set to 1 if no disable device mapping */
unsigned short debug; /* debug level */
unsigned int afid; /* authentication fid */
unsigned int cache; /* cache mode */
char *options; /* copy of mount options */
char *uname; /* user name to mount as */
char *aname; /* name of remote hierarchy being mounted */
unsigned int maxdata; /* max data for client interface */
unsigned int dfltuid; /* default uid/muid for legacy support */
unsigned int dfltgid; /* default gid for legacy support */
u32 uid; /* if ACCESS_SINGLE, the uid that has access */
struct p9_client *clnt; /* 9p client */
struct dentry *debugfs_dir;
};
/* session flags */
enum {
V9FS_EXTENDED = 0x01, /* 9P2000.u */
V9FS_ACCESS_MASK = 0x06, /* access mask */
V9FS_ACCESS_SINGLE = 0x02, /* only one user can access the files */
V9FS_ACCESS_USER = 0x04, /* attache per user */
V9FS_ACCESS_ANY = 0x06, /* use the same attach for all users */
};
/* possible values of ->cache */
/* eventually support loose, tight, time, session, default always none */
enum {
CACHE_NONE, /* default */
CACHE_LOOSE, /* no consistency */
};
extern struct dentry *v9fs_debugfs_root;
struct p9_fid *v9fs_session_init(struct v9fs_session_info *, const char *,
char *);
void v9fs_session_close(struct v9fs_session_info *v9ses);
void v9fs_session_cancel(struct v9fs_session_info *v9ses);
#define V9FS_MAGIC 0x01021997
/* other default globals */
#define V9FS_PORT 564
#define V9FS_DEFUSER "nobody"
#define V9FS_DEFANAME ""
#define V9FS_DEFUID (-2)
#define V9FS_DEFGID (-2)
static inline struct v9fs_session_info *v9fs_inode2v9ses(struct inode *inode)
{
return (inode->i_sb->s_fs_info);
}
static inline int v9fs_extended(struct v9fs_session_info *v9ses)
{
return v9ses->flags & V9FS_EXTENDED;
}
