Documentation/filesystems/9p.txt

   1                     v9fs: Plan 9 Resource Sharing for Linux
   2                     =======================================
   3
   4 ABOUT
   5 =====
   6
   7 v9fs is a Unix implementation of the Plan 9 9p remote filesystem protocol.
   8
   9 This software was originally developed by Ron Minnich <rminnich@lanl.gov>
  10 and Maya Gokhale <maya@lanl.gov>.  Additional development by Greg Watson
  11 <gwatson@lanl.gov> and most recently Eric Van Hensbergen
  12 <ericvh@gmail.com>, Latchesar Ionkov <lucho@ionkov.net> and Russ Cox
  13 <rsc@swtch.com>.
  14
  15 USAGE
  16 =====
  17
  18 For remote file server:
  19
  20         mount -t 9p 10.10.1.2 /mnt/9
  21
  22 For Plan 9 From User Space applications (http://swtch.com/plan9)
  23
  24         mount -t 9p `namespace`/acme /mnt/9 -o proto=unix,uname=$USER
  25
  26 OPTIONS
  27 =======
  28
  29   proto=name    select an alternative transport.  Valid options are
  30                 currently:
  31                         unix - specifying a named pipe mount point
  32                         tcp  - specifying a normal TCP/IP connection
  33                         fd   - used passed file descriptors for connection
  34                                 (see rfdno and wfdno)
  35
  36   uname=name    user name to attempt mount as on the remote server.  The
  37                 server may override or ignore this value.  Certain user
  38                 names may require authentication.
  39
  40   aname=name    aname specifies the file tree to access when the server is
  41                 offering several exported file systems.
  42
  43   debug=n       specifies debug level.  The debug level is a bitmask.
  44                         0x01 = display verbose error messages
  45                         0x02 = developer debug (DEBUG_CURRENT)
  46                         0x04 = display 9p trace
  47                         0x08 = display VFS trace
  48                         0x10 = display Marshalling debug
  49                         0x20 = display RPC debug
  50                         0x40 = display transport debug
  51                         0x80 = display allocation debug
  52
  53   rfdno=n       the file descriptor for reading with proto=fd
  54
  55   wfdno=n       the file descriptor for writing with proto=fd
  56
  57   maxdata=n     the number of bytes to use for 9p packet payload (msize)
  58
  59   port=n        port to connect to on the remote server
  60
  61   noextend      force legacy mode (no 9p2000.u semantics)
  62
  63   uid           attempt to mount as a particular uid
  64
  65   gid           attempt to mount with a particular gid
  66
  67   afid          security channel - used by Plan 9 authentication protocols
  68
  69   nodevmap      do not map special files - represent them as normal files.
  70                 This can be used to share devices/named pipes/sockets between
  71                 hosts.  This functionality will be expanded in later versions.
  72
  73 RESOURCES
  74 =========
  75
  76 Our current recommendation is to use Inferno (http://www.vitanuova.com/inferno)
  77 as the 9p server.  You can start a 9p server under Inferno by issuing the
  78 following command:
  79    ; styxlisten -A tcp!*!564 export '#U*'
  80
  81 The -A specifies an unauthenticated export.  The 564 is the port # (you may
  82 have to choose a higher port number if running as a normal user).  The '#U*'
  83 specifies exporting the root of the Linux name space.  You may specify a
  84 subset of the namespace by extending the path: '#U*'/tmp would just export
  85 /tmp.  For more information, see the Inferno manual pages covering styxlisten
  86 and export.
  87
  88 A Linux version of the 9p server is now maintained under the npfs project
  89 on sourceforge (http://sourceforge.net/projects/npfs).  There is also a
  90 more stable single-threaded version of the server (named spfs) available from
  91 the same CVS repository.
  92
  93 There are user and developer mailing lists available through the v9fs project
  94 on sourceforge (http://sourceforge.net/projects/v9fs).
  95
  96 News and other information is maintained on SWiK (http://swik.net/v9fs).
  97
  98 Bug reports may be issued through the kernel.org bugzilla
  99 (http://bugzilla.kernel.org)
 100
 101 For more information on the Plan 9 Operating System check out
 102 http://plan9.bell-labs.com/plan9
 103
 104 For information on Plan 9 from User Space (Plan 9 applications and libraries
 105 ported to Linux/BSD/OSX/etc) check out http://swtch.com/plan9
 106
 107
 108 STATUS
 109 ======
 110
 111 The 2.6 kernel support is working on PPC and x86.
 112
 113 PLEASE USE THE KERNEL BUGZILLA TO REPORT PROBLEMS. (http://bugzilla.kernel.org)
 114