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v9fs: Plan 9 Resource Sharing for Linux
=======================================
ABOUT
=====
v9fs is a Unix implementation of the Plan 9 9p remote filesystem protocol.
This software was originally developed by Ron Minnich <rminnich@lanl.gov>
and Maya Gokhale <maya@lanl.gov>. Additional development by Greg Watson
<gwatson@lanl.gov> and most recently Eric Van Hensbergen
<ericvh@gmail.com>, Latchesar Ionkov <lucho@ionkov.net> and Russ Cox
<rsc@swtch.com>.
USAGE
=====
For remote file server:
mount -t 9p 10.10.1.2 /mnt/9
For Plan 9 From User Space applications (http://swtch.com/plan9)
mount -t 9p `namespace`/acme /mnt/9 -o proto=unix,uname=$USER
OPTIONS
=======
proto=name select an alternative transport. Valid options are
currently:
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.
RESOURCES
=========
Our current recommendation is to use Inferno (http://www.vitanuova.com/inferno)
as the 9p server. You can start a 9p server under Inferno by issuing the
following command:
; styxlisten -A tcp!*!564 export '#U*'
The -A specifies an unauthenticated export. The 564 is the port # (you may
have to choose a higher port number if running as a normal user). The '#U*'
specifies exporting the root of the Linux name space. You may specify a
subset of the namespace by extending the path: '#U*'/tmp would just export
/tmp. For more information, see the Inferno manual pages covering styxlisten
and export.
A Linux version of the 9p server is now maintained under the npfs project
on sourceforge (http://sourceforge.net/projects/npfs). There is also a
more stable single-threaded version of the server (named spfs) available from
the same CVS repository.
There are user and developer mailing lists available through the v9fs project
on sourceforge (http://sourceforge.net/projects/v9fs).
News and other information is maintained on SWiK (http://swik.net/v9fs).
Bug reports may be issued through the kernel.org bugzilla
(http://bugzilla.kernel.org)
For more information on the Plan 9 Operating System check out
http://plan9.bell-labs.com/plan9
For information on Plan 9 from User Space (Plan 9 applications and libraries
ported to Linux/BSD/OSX/etc) check out http://swtch.com/plan9
STATUS
======
The 2.6 kernel support is working on PPC and x86.
PLEASE USE THE KERNEL BUGZILLA TO REPORT PROBLEMS. (http://bugzilla.kernel.org)
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