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