0ea6e61122
Below you will find an updated version from the original series bunching all patches into one big patch updating broken web addresses that are located in Documentation/* Some of the addresses date as far far back as 1995 etc... so searching became a bit difficult, the best way to deal with these is to use web.archive.org to locate these addresses that are outdated. Now there are also some addresses pointing to .spec files some are located, but some(after searching on the companies site)where still no where to be found. In this case I just changed the address to the company site this way the users can contact the company and they can locate them for the users. Signed-off-by: Justin P. Mattock <justinmattock@gmail.com> Signed-off-by: Thomas Weber <weber@corscience.de> Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Cc: Paulo Marques <pmarques@grupopie.com> Cc: Randy Dunlap <rdunlap@xenotime.net> Cc: Michael Neuling <mikey@neuling.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
174 lines
6.2 KiB
Plaintext
174 lines
6.2 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@sandia.gov>
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and Maya Gokhale. 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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The best detailed explanation of the Linux implementation and applications of
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the 9p client is available in the form of a USENIX paper:
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http://www.usenix.org/events/usenix05/tech/freenix/hensbergen.html
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Other applications are described in the following papers:
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* XCPU & Clustering
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http://xcpu.org/papers/xcpu-talk.pdf
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* KVMFS: control file system for KVM
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http://xcpu.org/papers/kvmfs.pdf
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* CellFS: A New Programming Model for the Cell BE
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http://xcpu.org/papers/cellfs-talk.pdf
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* PROSE I/O: Using 9p to enable Application Partitions
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http://plan9.escet.urjc.es/iwp9/cready/PROSE_iwp9_2006.pdf
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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 trans=unix,uname=$USER
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For server running on QEMU host with virtio transport:
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mount -t 9p -o trans=virtio <mount_tag> /mnt/9
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where mount_tag is the tag associated by the server to each of the exported
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mount points. Each 9P export is seen by the client as a virtio device with an
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associated "mount_tag" property. Available mount tags can be
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seen by reading /sys/bus/virtio/drivers/9pnet_virtio/virtio<n>/mount_tag files.
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OPTIONS
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=======
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trans=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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virtio - connect to the next virtio channel available
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(from QEMU with trans_virtio module)
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rdma - connect to a specified RDMA channel
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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 caching 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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fscache = use FS-Cache for a persistent, read-only
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cache backend.
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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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0x100 = display protocol message debug
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0x200 = display Fid debug
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0x400 = display packet debug
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0x800 = display fscache tracing debug
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rfdno=n the file descriptor for reading with trans=fd
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wfdno=n the file descriptor for writing with trans=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 or 9p2000.L semantics)
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version=name Select 9P protocol version. Valid options are:
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9p2000 - Legacy mode (same as noextend)
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9p2000.u - Use 9P2000.u protocol
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9p2000.L - Use 9P2000.L protocol
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dfltuid attempt to mount as a particular uid
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dfltgid 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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access there are three access modes.
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user = if a user tries to access a file on v9fs
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filesystem for the first time, v9fs sends an
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attach command (Tattach) for that user.
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This is the default mode.
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<uid> = allows only user with uid=<uid> to access
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the files on the mounted filesystem
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any = v9fs does single attach and performs all
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operations as one user
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cachetag cache tag to use the specified persistent cache.
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cache tags for existing cache sessions can be listed at
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/sys/fs/9p/caches. (applies only to cache=fscache)
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RESOURCES
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=========
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Our current recommendation is to use Inferno (http://www.vitanuova.com/nferno/index.html)
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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). The currently
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maintained version is the single-threaded version of the server (named spfs)
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available from the same SVN 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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A stand-alone version of the module (which should build for any 2.6 kernel)
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is available via (http://github.com/ericvh/9p-sac/tree/master)
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News and other information is maintained on SWiK (http://swik.net/v9fs)
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and the Wiki (http://sf.net/apps/mediawiki/v9fs/index.php).
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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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