Re: [PATCH] tools/xenstore: don't store domU's mfn of ring page in xensotred

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 28/04/2020 16:51, Juergen Gross wrote:
> The XS_INTRODUCE command has two parameters: the mfn (or better: gfn)
> of the domain's xenstore ring page and the event channel of the
> domain for communicating with Xenstore.
>
> The gfn is not really needed. It is stored in the per-domain struct
> in xenstored and in case of another XS_INTRODUCE for the domain it
> is tested to match the original value. If it doesn't match the
> command is aborted via EINVAL.
>
> Today there shouldn't be multiple XS_INTRODUCE requests for the same
> domain issued, so the mfn/gfn can just be ignored and multiple
> XS_INTRODUCE commands can be rejected without testing the mfn/gfn.
>
> Signed-off-by: Juergen Gross <jgross@xxxxxxxx>

In hindsight, this is cleanup following c/s 38eeb3864d "tools/xenstored:
Drop mapping of the ring via foreign map".

Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>