Re: [Xen-devel] [PATCH] allow netif frontend to indicate ethernet multicast groups of interest

[David Edmondson <dme@xxxxxxx>]

On 22 Nov 2007, at 2:01pm, Keir Fraser wrote:
> How does a frontend detect whether these options are supported by the
> backend?
The backend declares support by setting "feature-multicast-control"  
in xenstore. The frontend indicates that it will use the support by  
setting "request-multicast-control".
> What happens across save/restore?
The frontend is expected to re-add the set it cares about on restore.  
It is not expected to remove the set on suspend.
> Would this be better implemented
> by a multicast list in xenstore?
It seems very messy. The backend will have to watch one or more  
entries in the store, parse them, figure out which are already  
added, ...  The set of multicast address could be large (~100 seems  
feasible). How will the frontend know whether it's request to add a  
particular entry has been successful?
dme.


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