cifs.idmap man page on Oracle

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CIFS.IDMAP(8)		  System Administration tools		 CIFS.IDMAP(8)

       cifs.idmap - Userspace helper for mapping ids for Common Internet File
       System (CIFS)

       cifs.idmap [--help|-h] [--timeout|-t] [--version|-v] {keyid}

       This tool is part of the cifs-utils suite.

       cifs.idmap is a userspace helper program for the linux CIFS client
       filesystem. There are a number of activities that the kernel cannot
       easily do itself. This program is a callout program that does these
       things for the kernel and then returns the result.

       cifs.idmap is generally intended to be run when the kernel calls
       request-key(8) for a particular key type. While it can be run directly
       from the command-line, it is not generally intended to be run that way.

       This program is only called if a share is mounted with the cifsacl
       mount option. The kernel will only upcall to do this conversion if that
       mount option is specified.

       cifs.idmap relies on a plugin to handle the ID mapping. If it can't
       find the plugin then it will not work properly. The plugin (or a
       symlink to it) must be at /etc/cifs-utils/idmap-plugin.

       In the case where cifs.idmap or the plugin are unavailable, file
       objects in a mounted share are assigned uid and gid of the credentials
       of the process that mounted the share. It is strongly recomemended to
       use mount options of uid and gid to specify a default uid and gid to
       map owner SIDs and group SIDs in this situation.

	      Print the usage message and exit.

	   Set the expiration timer, in seconds on the key. The default is 600
	   seconds (10 minutes). Setting this to 0 will cause the key to never

	   Print version number and exit.

       cifs.idmap is designed to be called from the kernel via the request-key
       callout program. This requires that request-key be told where and how
       to call this program. Currently cifs.idmap handles a key type of:

	   This keytype is for mapping a SID to either an uid or a gid

       To make this program useful for CIFS, you will need to set up entry for
       it in request-key.conf(5). Here is an example of an entry for this key

	   #=========  =============  = = ================================
	   create      cifs.idmap     * * /usr/sbin/cifs.idmap %k

       See request-key.conf(5) for more info on each field.

       Support for upcalls to cifs.idmap was initially introduced in the 3.0

       request-key.conf(5), mount.cifs(8)

       Shirish Pargaonkar wrote the cifs.idmap program.

       The Linux CIFS Mailing list is the preferred place to ask questions
       regarding these programs.

cifs-utils			  05/26/2011			 CIFS.IDMAP(8)

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