/* * 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; }