Description of problem:

The following command fails:

[root@node-02 ~]# /sbin/mount.cifs //smb.server.domain/share/homedir /mnt -o "noperm,mapchars,dir_mode=0750,file_mode=0640,uid=myusername,forceuid,gid=root,forcegid,domain=server.domain,user=myusername"
Password for myusername@//smb.server.domain/share/homedir:  ********
mount error(22): Invalid argument
Refer to the mount.cifs(8) manual page (e.g. man mount.cifs)

/var/log/messages reports that the "forcegid" option is unknown:

[root@node-02 ~]# grep forcegid /var/log/messages
Aug 21 15:30:40 node-02 kernel: [693888.328908] CIFS: Unknown mount option "forcegid"

The man page indicates that the option should be known:

[root@node-02 ~]# man --pager=cat mount.cifs | grep -B 1 -A 3 forcegid

       forcegid
           instructs the client to ignore any gid provided by the server for files and directories and to
           always assign the owner to be the value of the gid= option. See the section on FILE AND DIRECTORY
           OWNERSHIP AND PERMISSIONS below for more information.
--

       If the uid´s and gid´s being used do not match on the client and server, the forceuid and forcegid
       options may be helpful. Note however, that there is no corresponding option to override the mode.
       Permissions assigned to a file when forceuid or forcegid are in effect may not reflect the the real
       permissions.

The command succeeds if I simply remove the "forcegid" parameter.

Version-Release number of selected component (if applicable):

5.6-1

How reproducible:

Always

Steps to Reproduce:

See Description.
  
Actual results:

Invalid argument

Expected results:

Successful mount

Additional info:

I don't personally need this flag.  This bug report is just FYI.