19e82cf6aSEric Van Hensbergen /* 29e82cf6aSEric Van Hensbergen * V9FS definitions. 39e82cf6aSEric Van Hensbergen * 48a0dc95fSEric Van Hensbergen * Copyright (C) 2004-2008 by Eric Van Hensbergen <ericvh@gmail.com> 59e82cf6aSEric Van Hensbergen * Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov> 69e82cf6aSEric Van Hensbergen * 79e82cf6aSEric Van Hensbergen * This program is free software; you can redistribute it and/or modify 842e8c509SEric Van Hensbergen * it under the terms of the GNU General Public License version 2 942e8c509SEric Van Hensbergen * as published by the Free Software Foundation. 109e82cf6aSEric Van Hensbergen * 119e82cf6aSEric Van Hensbergen * This program is distributed in the hope that it will be useful, 129e82cf6aSEric Van Hensbergen * but WITHOUT ANY WARRANTY; without even the implied warranty of 139e82cf6aSEric Van Hensbergen * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 149e82cf6aSEric Van Hensbergen * GNU General Public License for more details. 159e82cf6aSEric Van Hensbergen * 169e82cf6aSEric Van Hensbergen * You should have received a copy of the GNU General Public License 179e82cf6aSEric Van Hensbergen * along with this program; if not, write to: 189e82cf6aSEric Van Hensbergen * Free Software Foundation 199e82cf6aSEric Van Hensbergen * 51 Franklin Street, Fifth Floor 209e82cf6aSEric Van Hensbergen * Boston, MA 02111-1301 USA 219e82cf6aSEric Van Hensbergen * 229e82cf6aSEric Van Hensbergen */ 239e82cf6aSEric Van Hensbergen 24ee443996SEric Van Hensbergen /** 25ee443996SEric Van Hensbergen * enum p9_session_flags - option flags for each 9P session 26ee443996SEric Van Hensbergen * @V9FS_EXTENDED: whether or not to use 9P2000.u extensions 27ee443996SEric Van Hensbergen * @V9FS_ACCESS_SINGLE: only the mounting user can access the hierarchy 28ee443996SEric Van Hensbergen * @V9FS_ACCESS_USER: a new attach will be issued for every user (default) 29ee443996SEric Van Hensbergen * @V9FS_ACCESS_ANY: use a single attach for all users 30ee443996SEric Van Hensbergen * @V9FS_ACCESS_MASK: bit mask of different ACCESS options 319e82cf6aSEric Van Hensbergen * 32ee443996SEric Van Hensbergen * Session flags reflect options selected by users at mount time 33ee443996SEric Van Hensbergen */ 34ee443996SEric Van Hensbergen enum p9_session_flags { 35ee443996SEric Van Hensbergen V9FS_EXTENDED = 0x01, 36ee443996SEric Van Hensbergen V9FS_ACCESS_SINGLE = 0x02, 37ee443996SEric Van Hensbergen V9FS_ACCESS_USER = 0x04, 38ee443996SEric Van Hensbergen V9FS_ACCESS_ANY = 0x06, 39ee443996SEric Van Hensbergen V9FS_ACCESS_MASK = 0x06, 40ee443996SEric Van Hensbergen }; 41ee443996SEric Van Hensbergen 42ee443996SEric Van Hensbergen /* possible values of ->cache */ 43ee443996SEric Van Hensbergen /** 44ee443996SEric Van Hensbergen * enum p9_cache_modes - user specified cache preferences 45ee443996SEric Van Hensbergen * @CACHE_NONE: do not cache data, dentries, or directory contents (default) 46ee443996SEric Van Hensbergen * @CACHE_LOOSE: cache data, dentries, and directory contents w/no consistency 47ee443996SEric Van Hensbergen * 48ee443996SEric Van Hensbergen * eventually support loose, tight, time, session, default always none 49ee443996SEric Van Hensbergen */ 50ee443996SEric Van Hensbergen 51ee443996SEric Van Hensbergen enum p9_cache_modes { 52ee443996SEric Van Hensbergen CACHE_NONE, 53ee443996SEric Van Hensbergen CACHE_LOOSE, 5460e78d2cSAbhishek Kulkarni CACHE_FSCACHE, 55ee443996SEric Van Hensbergen }; 56ee443996SEric Van Hensbergen 57ee443996SEric Van Hensbergen /** 58ee443996SEric Van Hensbergen * struct v9fs_session_info - per-instance session information 59ee443996SEric Van Hensbergen * @flags: session options of type &p9_session_flags 60ee443996SEric Van Hensbergen * @nodev: set to 1 to disable device mapping 61ee443996SEric Van Hensbergen * @debug: debug level 62ee443996SEric Van Hensbergen * @afid: authentication handle 63ee443996SEric Van Hensbergen * @cache: cache mode of type &p9_cache_modes 6460e78d2cSAbhishek Kulkarni * @cachetag: the tag of the cache associated with this session 6560e78d2cSAbhishek Kulkarni * @fscache: session cookie associated with FS-Cache 66ee443996SEric Van Hensbergen * @options: copy of options string given by user 67ee443996SEric Van Hensbergen * @uname: string user name to mount hierarchy as 68ee443996SEric Van Hensbergen * @aname: mount specifier for remote hierarchy 69ee443996SEric Van Hensbergen * @maxdata: maximum data to be sent/recvd per protocol message 70ee443996SEric Van Hensbergen * @dfltuid: default numeric userid to mount hierarchy as 71ee443996SEric Van Hensbergen * @dfltgid: default numeric groupid to mount hierarchy as 72ee443996SEric Van Hensbergen * @uid: if %V9FS_ACCESS_SINGLE, the numeric uid which mounted the hierarchy 73ee443996SEric Van Hensbergen * @clnt: reference to 9P network client instantiated for this session 7460e78d2cSAbhishek Kulkarni * @slist: reference to list of registered 9p sessions 75ee443996SEric Van Hensbergen * 76ee443996SEric Van Hensbergen * This structure holds state for each session instance established during 77ee443996SEric Van Hensbergen * a sys_mount() . 78ee443996SEric Van Hensbergen * 79ee443996SEric Van Hensbergen * Bugs: there seems to be a lot of state which could be condensed and/or 80ee443996SEric Van Hensbergen * removed. 819e82cf6aSEric Van Hensbergen */ 829e82cf6aSEric Van Hensbergen 839e82cf6aSEric Van Hensbergen struct v9fs_session_info { 849e82cf6aSEric Van Hensbergen /* options */ 85ee443996SEric Van Hensbergen unsigned char flags; 86ee443996SEric Van Hensbergen unsigned char nodev; 87ee443996SEric Van Hensbergen unsigned short debug; 88ee443996SEric Van Hensbergen unsigned int afid; 89ee443996SEric Van Hensbergen unsigned int cache; 9060e78d2cSAbhishek Kulkarni #ifdef CONFIG_9P_FSCACHE 9160e78d2cSAbhishek Kulkarni char *cachetag; 9260e78d2cSAbhishek Kulkarni struct fscache_cookie *fscache; 9360e78d2cSAbhishek Kulkarni #endif 949e82cf6aSEric Van Hensbergen 95ba17674fSLatchesar Ionkov char *uname; /* user name to mount as */ 96ba17674fSLatchesar Ionkov char *aname; /* name of remote hierarchy being mounted */ 978a0dc95fSEric Van Hensbergen unsigned int maxdata; /* max data for client interface */ 98bd32b82dSLatchesar Ionkov unsigned int dfltuid; /* default uid/muid for legacy support */ 99bd32b82dSLatchesar Ionkov unsigned int dfltgid; /* default gid for legacy support */ 100ba17674fSLatchesar Ionkov u32 uid; /* if ACCESS_SINGLE, the uid that has access */ 101bd238fb4SLatchesar Ionkov struct p9_client *clnt; /* 9p client */ 10260e78d2cSAbhishek Kulkarni struct list_head slist; /* list of sessions registered with v9fs */ 1039e82cf6aSEric Van Hensbergen }; 1049e82cf6aSEric Van Hensbergen 105bd238fb4SLatchesar Ionkov struct p9_fid *v9fs_session_init(struct v9fs_session_info *, const char *, 106bd238fb4SLatchesar Ionkov char *); 1079e82cf6aSEric Van Hensbergen void v9fs_session_close(struct v9fs_session_info *v9ses); 108322b329aSEric Van Hensbergen void v9fs_session_cancel(struct v9fs_session_info *v9ses); 1099e82cf6aSEric Van Hensbergen 1109e82cf6aSEric Van Hensbergen #define V9FS_MAGIC 0x01021997 1119e82cf6aSEric Van Hensbergen 1129e82cf6aSEric Van Hensbergen /* other default globals */ 1139e82cf6aSEric Van Hensbergen #define V9FS_PORT 564 1149e82cf6aSEric Van Hensbergen #define V9FS_DEFUSER "nobody" 1159e82cf6aSEric Van Hensbergen #define V9FS_DEFANAME "" 116bd32b82dSLatchesar Ionkov #define V9FS_DEFUID (-2) 117bd32b82dSLatchesar Ionkov #define V9FS_DEFGID (-2) 1189e82cf6aSEric Van Hensbergen 119bd238fb4SLatchesar Ionkov static inline struct v9fs_session_info *v9fs_inode2v9ses(struct inode *inode) 120bd238fb4SLatchesar Ionkov { 121bd238fb4SLatchesar Ionkov return (inode->i_sb->s_fs_info); 122bd238fb4SLatchesar Ionkov } 1232405669bSLatchesar Ionkov 1242405669bSLatchesar Ionkov static inline int v9fs_extended(struct v9fs_session_info *v9ses) 1252405669bSLatchesar Ionkov { 1262405669bSLatchesar Ionkov return v9ses->flags & V9FS_EXTENDED; 1272405669bSLatchesar Ionkov } 128