netdev - Re: [Patch net-next v2 3/3] bridge: send query as soon as leave is received

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Date:	Tue, 30 Apr 2013 12:05:17 +0800
From:	Cong Wang <amwang@...hat.com>
To:	Herbert Xu <herbert@...dor.hengli.com.au>
Cc:	netdev@...r.kernel.org,
	Stephen Hemminger <stephen@...workplumber.org>,
	"David S. Miller" <davem@...emloft.net>,
	Adam Baker <linux@...er-net.org.uk>
Subject: Re: [Patch net-next v2 3/3] bridge: send query as soon as leave is
 received

On Tue, 2013-04-30 at 11:45 +0800, Herbert Xu wrote:
> On Tue, Apr 30, 2013 at 11:41:10AM +0800, Cong Wang wrote:
> > From: Cong Wang <amwang@...hat.com>
> > 
> > Continue sending queries when leave is received if the user marks
> > it as a querier.
> > 
> > Cc: Herbert Xu <herbert@...dor.apana.org.au>
> > Cc: Stephen Hemminger <stephen@...workplumber.org>
> > Cc: "David S. Miller" <davem@...emloft.net>
> > Cc: Adam Baker <linux@...er-net.org.uk>
> > Signed-off-by: Cong Wang <amwang@...hat.com>
> > ---
> > v2: only send query to the port received leave
> > 
> >  net/bridge/br_multicast.c |    7 +++++++
> >  1 files changed, 7 insertions(+), 0 deletions(-)
> > 
> > diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
> > index bab3d5a..b1879c8 100644
> > --- a/net/bridge/br_multicast.c
> > +++ b/net/bridge/br_multicast.c
> > @@ -1250,6 +1250,13 @@ static void br_multicast_leave_group(struct net_bridge *br,
> >  	if (!mp)
> >  		goto out;
> >  
> > +	if (br->multicast_querier) {
> > +		if (port)
> > +			__br_multicast_enable_port(port);
> > +		else
> > +			mod_timer(&br->multicast_query_timer, jiffies);
> > +	}
> 
> AFAICS this is still sending a general query as opposed to a
> group-specific query, no?
> 

When port is NULL, the query should only be sent to bridge itself, so I
think this is what we expect, right? Since we receive leave from bridge
itself.


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