FS_EXPORTAFS(1) 					       AFS Command Reference						   FS_EXPORTAFS(1)

NAME

       fs_exportafs - Configures export of AFS to clients of other file systems

SYNOPSIS

       fs exportafs -type <exporter name>
	   [-start <start/stop translator (on | off)>]
	   [-convert <convert from afs to unix mode (on | off)>]
	   [-uidcheck <run on strict 'uid check' mode (on | off)>]
	   [-submounts <allow nfs mounts to subdirs of /afs/.. (on | off)>]
	   [-help]

       fs exp -t <exporter name>
	   [-st <start/stop translator (on | off)>]
	   [-c <convert from afs to unix mode (on | off)>]
	   [-u <run on strict 'uid check' mode (on | off)>]
	   [-su <allow nfs mounts to subdirs of /afs/.. (on | off)>]
	   [-h]

DESCRIPTION

       The fs exportafs command sets (if the -start argument is provided) or reports (if it is omitted) whether the machine can reexport the AFS
       filespace to clients of a non-AFS file system. To control certain features of the translation protocol, use the following arguments:

       o   To control whether the UNIX group and other mode bits on an AFS file or directory are set to match the owner mode bits when it is
	   exported to the non-AFS file system, use the -convert argument.

       o   To control whether tokens can be placed in a credential structure identified by a UID that differs from the local UID of the entity
	   that is placing the tokens in the structure, use the -uidcheck argument. The most common use is to control whether issuers of the knfs
	   command can specify a value for its -id argument that does not match their local UID on the NFS/AFS translator machine.

       o   To control whether users can create mounts in the non-AFS filespace to an AFS directory other than /afs, use the -submounts argument.

OPTIONS

       -type <exporter name>
	   Names the alternate file system to which to reexport the AFS filespace. The only acceptable value is "nfs", in lowercase letters only.

       -start on =item -start off
	   Enables the local machine to reexport the AFS filespace if the value is "on", or disables it if the value is "off". Omit this argument
	   to report the current setting for all of the configurable parameters.

       -convert on =item -convert off
	   Controls the setting of the UNIX group and other mode bits on AFS files and directories exported to the non-AFS file system. If the
	   value is "on", they are set to match the owner mode bits. If the value is "off", the bits are not changed. If this argument is omitted,
	   the default value is "on".

       -uidcheck on =item -uidcheck off
	   Controls whether tokens can be placed in a credential structure identified by a UID that differs from the local UID of the entity that
	   is placing the tokens in the structure.

	   o   If the value is on, the UID that identifies the credential structure must match the local UID.

	       With respect to the knfs command, this value means that the value of -id argument must match the issuer's local UID on the
	       translator machine. In practice, this setting makes it pointless to include the -id argument to the knfs command, because the only
	       acceptable value (the issuer's local UID) is already used when the -id argument is omitted.

	       Enabling UID checking also makes it impossible to issue the klog and pagsh commands on a client machine of the non-AFS file system
	       even though it is a system type supported by AFS. For an explanation, see klog(1).

	   o   If the value is off (the default), tokens can be assigned to a local UID in the non-AFS file system that does not match the local
	       UID of the entity assigning the tokens.

	       With respect to the knfs command, it means that the issuer can use the -id argument to assign tokens to a local UID on the NFS
	       client machine that does not match his or her local UID on the translator machine. (An example is assigning tokens to the MFS
	       client machine's local superuser "root".) This setting allows more than one issuer of the knfs command to make tokens available to
	       the same user on the NFS client machine. Each time a different user issues the knfs command with the same value for the -id
	       argument, that user's tokens overwrite the existing ones. This can result in unpredictable access for the user on the NFS client
	       machine.

       -submounts on =item -submounts off
	   Controls whether a user of the non-AFS filesystem can mount any directory in the AFS filespace other than the top-level /afs directory.
	   If the value is "on", such submounts are allowed. If the value is "off", only mounts of the /afs directory are allowed. If this
	   argument is omitted, the default value is "off".

       -help
	   Prints the online help for this command. All other valid options are ignored.

OUTPUT

       If the machine is not even configured as a server of the non-AFS file system, the following message appears:

	  Sorry, the <file_system>-exporter type is currently not supported on
	  this AFS client

       If the machine is configured as a server of the non-AFS file system but is not currently enabled to reexport AFS to it (because the -start
       argument to this command is not set to "on"), the message is as follows:

	  '<file_system>' translator is disabled

       If the machine is enabled to reexport AFS, the following message precedes messages that report the settings of the other parameters.

	  '<file_system>' translator is enabled with the following options:

       The following messages indicate that the -convert argument is set to "on" or "off" respectively:

	  Running in convert owner mode bits to world/other mode
	  Running in strict unix mode

       The following messages indicate that the -uidcheck argument is set to "on" or "off" respectively:

	  Running in strict 'passwd sync' mode
	  Running in no 'passwd sync' mode

       The following messages indicate that the -submounts argument is set to "on" or "off" respectively:

	  Allow mounts of /afs/.. subdirs
	  Only mounts to /afs allowed

EXAMPLES

       The following example shows that the local machine can export AFS to NFS client machines.

	  % fs exportafs nfs
	  'nfs' translator is enabled with the following options:
	       Running in convert owner mode bits to world/other mode
	       Running in no 'passwd sync' mode
	       Only mounts to /afs allowed

       The following example enables the machine as an NFS server and converts the UNIX group and other mode bits on exported AFS directories and
       files to match the UNIX owner mode bits.

	  % fs exportafs -type nfs -start on -convert on

       The following example disables the machine from reexporting AFS to NFS client machines:

	  % fs exportafs -type nfs -start off

PRIVILEGE REQUIRED

       The issuer must be logged in as the local superuser root.

SEE ALSO

       klog(1), knfs(1)

COPYRIGHT

       IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.

       This documentation is covered by the IBM Public License Version 1.0.  It was converted from HTML to POD by software written by Chas
       Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.

OpenAFS 							    2012-03-26							   FS_EXPORTAFS(1)