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 * Session structure provides information for an opened session 26 * 27 */ 28 29 struct v9fs_session_info { 30 /* options */ 31 unsigned int maxdata; 32 unsigned char flags; /* session flags */ 33 unsigned char nodev; /* set to 1 if no disable device mapping */ 34 unsigned short debug; /* debug level */ 35 unsigned int afid; /* authentication fid */ 36 unsigned int cache; /* cache mode */ 37 38 char *options; /* copy of mount options */ 39 char *uname; /* user name to mount as */ 40 char *aname; /* name of remote hierarchy being mounted */ 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_trans_module *trans; /* 9p transport */ 45 struct p9_client *clnt; /* 9p client */ 46 struct dentry *debugfs_dir; 47 }; 48 49 /* session flags */ 50 enum { 51 V9FS_EXTENDED = 0x01, /* 9P2000.u */ 52 V9FS_ACCESS_MASK = 0x06, /* access mask */ 53 V9FS_ACCESS_SINGLE = 0x02, /* only one user can access the files */ 54 V9FS_ACCESS_USER = 0x04, /* attache per user */ 55 V9FS_ACCESS_ANY = 0x06, /* use the same attach for all users */ 56 }; 57 58 /* possible values of ->cache */ 59 /* eventually support loose, tight, time, session, default always none */ 60 enum { 61 CACHE_NONE, /* default */ 62 CACHE_LOOSE, /* no consistency */ 63 }; 64 65 extern struct dentry *v9fs_debugfs_root; 66 67 struct p9_fid *v9fs_session_init(struct v9fs_session_info *, const char *, 68 char *); 69 void v9fs_session_close(struct v9fs_session_info *v9ses); 70 void v9fs_session_cancel(struct v9fs_session_info *v9ses); 71 72 #define V9FS_MAGIC 0x01021997 73 74 /* other default globals */ 75 #define V9FS_PORT 564 76 #define V9FS_DEFUSER "nobody" 77 #define V9FS_DEFANAME "" 78 #define V9FS_DEFUID (-2) 79 #define V9FS_DEFGID (-2) 80 81 static inline struct v9fs_session_info *v9fs_inode2v9ses(struct inode *inode) 82 { 83 return (inode->i_sb->s_fs_info); 84 } 85 86 static inline int v9fs_extended(struct v9fs_session_info *v9ses) 87 { 88 return v9ses->flags & V9FS_EXTENDED; 89 } 90