[RFC/PATCH] cifs.upcall: use kernel.provided principal name if available

[Martin Wilck]

> For the record, I'm not 100% opposed to adding something like this as a
> workaround. What would probably be better would be a way for someone to
> specify the SPN in the mount options. The kernel could then pass that
> to the upcall and we wouldn't need to trust this string from the
> server. Admins would of course need to know what SPN to put in there
> however. Something like:
> 
>     -o spn=cifs/otherhostname.example.com

Sounds good. In our AD environment, an admin can do

ldapsearch "(cn=$COMPUTERNAME)" serviceprincipalname

to get the supported principal name(s).

Martin

-- 
Dr. Martin Wilck
PRIMERGY System Software Engineer
x86 Server Engineering

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