fs/9p/v9fs.h

   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 extended; /* set to 1 if we are using UNIX extensions */
  33         unsigned char nodev;    /* set to 1 if no disable device mapping */
  34         unsigned short port;    /* port to connect to */
  35         unsigned short debug;   /* debug level */
  36         unsigned short proto;   /* protocol to use */
  37         unsigned int afid;      /* authentication fid */
  38         unsigned int rfdno;     /* read file descriptor number */
  39         unsigned int wfdno;     /* write file descriptor number */
  40         unsigned int cache;     /* cache mode */
  41
  42         char *name;             /* user name to mount as */
  43         char *remotename;       /* name of remote hierarchy being mounted */
  44         unsigned int uid;       /* default uid/muid for legacy support */
  45         unsigned int gid;       /* default gid for legacy support */
  46
  47         struct p9_client *clnt; /* 9p client */
  48         struct dentry *debugfs_dir;
  49 };
  50
  51 /* possible values of ->proto */
  52 enum {
  53         PROTO_TCP,
  54         PROTO_UNIX,
  55         PROTO_FD,
  56         PROTO_PCI,
  57 };
  58
  59 /* possible values of ->cache */
  60 /* eventually support loose, tight, time, session, default always none */
  61 enum {
  62         CACHE_NONE,             /* default */
  63         CACHE_LOOSE,            /* no consistency */
  64 };
  65
  66 extern struct dentry *v9fs_debugfs_root;
  67
  68 struct p9_fid *v9fs_session_init(struct v9fs_session_info *, const char *,
  69                                                                         char *);
  70 void v9fs_session_close(struct v9fs_session_info *v9ses);
  71 void v9fs_session_cancel(struct v9fs_session_info *v9ses);
  72
  73 #define V9FS_MAGIC 0x01021997
  74
  75 /* other default globals */
  76 #define V9FS_PORT               564
  77 #define V9FS_DEFUSER    "nobody"
  78 #define V9FS_DEFANAME   ""
  79
  80 static inline struct v9fs_session_info *v9fs_inode2v9ses(struct inode *inode)
  81 {
  82         return (inode->i_sb->s_fs_info);
  83 }