mirror of https://gitee.com/openkylin/linux.git
119 lines
3.9 KiB
Plaintext
119 lines
3.9 KiB
Plaintext
v9fs: Plan 9 Resource Sharing for Linux
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=======================================
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ABOUT
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=====
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v9fs is a Unix implementation of the Plan 9 9p remote filesystem protocol.
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This software was originally developed by Ron Minnich <rminnich@lanl.gov>
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and Maya Gokhale <maya@lanl.gov>. Additional development by Greg Watson
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<gwatson@lanl.gov> and most recently Eric Van Hensbergen
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<ericvh@gmail.com>, Latchesar Ionkov <lucho@ionkov.net> and Russ Cox
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<rsc@swtch.com>.
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USAGE
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=====
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For remote file server:
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mount -t 9p 10.10.1.2 /mnt/9
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For Plan 9 From User Space applications (http://swtch.com/plan9)
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mount -t 9p `namespace`/acme /mnt/9 -o proto=unix,uname=$USER
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OPTIONS
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=======
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proto=name select an alternative transport. Valid options are
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currently:
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unix - specifying a named pipe mount point
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tcp - specifying a normal TCP/IP connection
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fd - used passed file descriptors for connection
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(see rfdno and wfdno)
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uname=name user name to attempt mount as on the remote server. The
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server may override or ignore this value. Certain user
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names may require authentication.
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aname=name aname specifies the file tree to access when the server is
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offering several exported file systems.
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cache=mode specifies a cacheing policy. By default, no caches are used.
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loose = no attempts are made at consistency,
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intended for exclusive, read-only mounts
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debug=n specifies debug level. The debug level is a bitmask.
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0x01 = display verbose error messages
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0x02 = developer debug (DEBUG_CURRENT)
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0x04 = display 9p trace
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0x08 = display VFS trace
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0x10 = display Marshalling debug
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0x20 = display RPC debug
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0x40 = display transport debug
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0x80 = display allocation debug
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rfdno=n the file descriptor for reading with proto=fd
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wfdno=n the file descriptor for writing with proto=fd
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maxdata=n the number of bytes to use for 9p packet payload (msize)
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port=n port to connect to on the remote server
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noextend force legacy mode (no 9p2000.u semantics)
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uid attempt to mount as a particular uid
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gid attempt to mount with a particular gid
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afid security channel - used by Plan 9 authentication protocols
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nodevmap do not map special files - represent them as normal files.
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This can be used to share devices/named pipes/sockets between
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hosts. This functionality will be expanded in later versions.
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RESOURCES
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=========
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Our current recommendation is to use Inferno (http://www.vitanuova.com/inferno)
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as the 9p server. You can start a 9p server under Inferno by issuing the
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following command:
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; styxlisten -A tcp!*!564 export '#U*'
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The -A specifies an unauthenticated export. The 564 is the port # (you may
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have to choose a higher port number if running as a normal user). The '#U*'
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specifies exporting the root of the Linux name space. You may specify a
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subset of the namespace by extending the path: '#U*'/tmp would just export
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/tmp. For more information, see the Inferno manual pages covering styxlisten
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and export.
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A Linux version of the 9p server is now maintained under the npfs project
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on sourceforge (http://sourceforge.net/projects/npfs). There is also a
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more stable single-threaded version of the server (named spfs) available from
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the same CVS repository.
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There are user and developer mailing lists available through the v9fs project
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on sourceforge (http://sourceforge.net/projects/v9fs).
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News and other information is maintained on SWiK (http://swik.net/v9fs).
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Bug reports may be issued through the kernel.org bugzilla
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(http://bugzilla.kernel.org)
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For more information on the Plan 9 Operating System check out
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http://plan9.bell-labs.com/plan9
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For information on Plan 9 from User Space (Plan 9 applications and libraries
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ported to Linux/BSD/OSX/etc) check out http://swtch.com/plan9
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STATUS
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======
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The 2.6 kernel support is working on PPC and x86.
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PLEASE USE THE KERNEL BUGZILLA TO REPORT PROBLEMS. (http://bugzilla.kernel.org)
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