Re: [PATCH] public/io/netif.h: change semantics of "request-multicast-control" flag

[Wei Liu <wei.liu2@citrix.com>]

On Thu, Jan 21, 2016 at 04:35:40PM +0100, Roger Pau Monné wrote:
> El 21/01/16 a les 16.29, Ian Campbell ha escrit:
> > On Wed, 2016-01-20 at 12:50 +0000, Paul Durrant wrote:
> >> My patch b2700877 "move and amend multicast control documentation"
> >> clarified use of the multicast control protocol between frontend and
> >> backend. However, it transpires that the restrictions that documentation
> >> placed on the "request-multicast-control" flag make it hard for a
> >> frontend to enable 'all multicast' promiscuous mode, in that to do so
> >> would require the frontend and backend to disconnect and re-connect.
> >>
> >> This patch adds a new "feature-dynamic-multicast-control" flag to allow
> >> a backend to advertise that it will watch "request-multicast-control" hence
> >> allowing it to be meaningfully modified by the frontend at any time rather
> >> than only when the frontend and backend are disconnected.
> >>
> >> Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
> >> Cc: Ian Campbell <ian.campbell@citrix.com>
> >> Cc: Ian Jackson <ian.jackson@eu.citrix.com>
> >> Cc: Jan Beulich <jbeulich@suse.com>
> >> Cc: Keir Fraser <keir@xen.org>
> >> Cc: Tim Deegan <tim@xen.org>
> > 
> > 
> > This looks good to me, but also adding Wei (Linux netback + BSD stuff) and
> > Roger (BSD stuff) for their perspective.
> > 
> > I should probably have done that for the last set of netif.h changes too,
> > since apart from the nominal maintainers of xen/include/public/io/*.h it's
> > worth getting input from the maintainers of the consumers. Not sure we can
> > express that very well in MAINTAINERS :-(.
> 
> I'm going to leave this one to Wei, he has more experience than me
> regarding FreeBSD netfront (and xen-net related topics).
> 
> FWIW, a quick and dirty grep on FreeBSD netfront doesn't show any
> results for "request-multicast-control", so I guess it's not implemented.
> 

No, it is not implemented.

Wei.

> Roger.
>