[linux-cifs-client] mount to symlink dir

[Steve French]

In testing a way to handle the request for "deep tree mounts" (path 
prefixes) on cifs mounts (Samba bugzilla 4040), I ran into a strange 
problem.

I exported /boot on the server but accidently typed in boot as the path 
prefix
ie
    mount -t cifs //localhost/boot             /mnt -o prefixpath=boot
which is basically
    mount -t cifs //localhost/boot/boot     /mnt

or will be when mount.cifs is changed to parse for the extra / in the 
UNC names and
convert it to the new cifs kernel mount parm "prefixpath" which we 
prepend to path
based requests.

Problem is /boot/boot is a symlink to . which results in strange problems.

Basically this means that //localhost/boot/boot resolves to . which is 
strange.

If you try to mount to a file (rather than directory) target - mount 
will fail - but
what is mount supposed to do if you mount to a symlink to .

Ideas?