smbd: implement SMB_FILE_NORMALIZED_NAME_INFORMATION handling

[Ralph Boehme]

On Tue, Apr 30, 2019 at 01:25:34PM +0200, Stefan Metzmacher via samba-technical wrote:
>Hi,
>
>I just created https://gitlab.com/samba-team/samba/merge_requests/400
>with the patches to implement SMB_FILE_NORMALIZED_NAME_INFORMATION.
>
>Windows 10 (1803 and higher) support and use
>SMB_FILE_NORMALIZED_NAME_INFORMATION
>calls over the network. As a fallback (in case the server don't support
>it) the client traverses all path components, which is very expensive.
>
>Implementing SMB_FILE_NORMALIZED_NAME_INFORMATION is very cheap for us
>as the open already went through unix_convert() and we have the
>information the client is asking for.
>
>See also https://bugzilla.samba.org/show_bug.cgi?id=13919
>
>Please review and push:-)

thanks metze! I'll take a look.

-slow

-- 
Ralph Boehme, Samba Team                https://samba.org/
Samba Developer, SerNet GmbH   https://sernet.de/en/samba/
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