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v9fs: Plan 9 Resource Sharing for Linux
v9fs is a Unix implementation of the Plan 9 9p remote filesystem protocol.
This software was originally developed by Ron Minnich <>
and Maya Gokhale <>. Additional development by Greg Watson
<> and most recently Eric Van Hensbergen
<>, Latchesar Ionkov <> and Russ Cox
For remote file server:
mount -t 9p /mnt/9
For Plan 9 From User Space applications (
mount -t 9p `namespace`/acme /mnt/9 -o proto=unix,uname=$USER
proto=name select an alternative transport. Valid options are
unix - specifying a named pipe mount point
tcp - specifying a normal TCP/IP connection
fd - used passed file descriptors for connection
(see rfdno and wfdno)
uname=name user name to attempt mount as on the remote server. The
server may override or ignore this value. Certain user
names may require authentication.
aname=name aname specifies the file tree to access when the server is
offering several exported file systems.
debug=n specifies debug level. The debug level is a bitmask.
0x01 = display verbose error messages
0x02 = developer debug (DEBUG_CURRENT)
0x04 = display 9p trace
0x08 = display VFS trace
0x10 = display Marshalling debug
0x20 = display RPC debug
0x40 = display transport debug
0x80 = display allocation debug
rfdno=n the file descriptor for reading with proto=fd
wfdno=n the file descriptor for writing with proto=fd
maxdata=n the number of bytes to use for 9p packet payload (msize)
port=n port to connect to on the remote server
noextend force legacy mode (no 9p2000.u semantics)
uid attempt to mount as a particular uid
gid attempt to mount with a particular gid
afid security channel - used by Plan 9 authentication protocols
nodevmap do not map special files - represent them as normal files.
This can be used to share devices/named pipes/sockets between
hosts. This functionality will be expanded in later versions.
The Linux version of the 9p server is now maintained under the npfs project
on sourceforge (
There are user and developer mailing lists available through the v9fs project
on sourceforge (
News and other information is maintained on SWiK (
Bug reports may be issued through the bugzilla
For more information on the Plan 9 Operating System check out
For information on Plan 9 from User Space (Plan 9 applications and libraries
ported to Linux/BSD/OSX/etc) check out
The 2.6 kernel support is working on PPC and x86.