[PATCH][WIP] populate superblock uuid at mount time

[Steve French]

In order to get the unique id for the volume (the 8 byte
VolumeSerialNumber) we need to issue a QUERY_INFO level 59
(FILE_ID_INFORMATION).  Today we only query the older 4 byte (not
guaranteed to be unique serial number).   See section 2.4.21 of
MS-FSCC.  Looks like Samba and ksmbd do not support this info level
though - although Windows does support it.

Any thoughts on ksmbd or Samba support for FILE_ID_INFORMATION query?

See attached work in progress patch

-- 
Thanks,

Steve
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