From: Veaceslav Falico <vfalico@xxxxxxxxxx> Date: Sun, 15 May 2011 18:59:45 +0200 > ip_mc_clear_src resets the imc->sfcount and imc->sfmode, without taking into > account the current number of sockets listening on that multicast struct, which > can lead to bogus routes for local listeners. > > On NETDEV_DOWN/UP event, if there were 3 multicast listeners for that interface's > address, the imc->sfcount[MCAST_EXCLUDE] will be reset to 1. And after that a > listener socket destroys, multicast traffic will not be delivered to local > listeners because __mkroute_output drops the local flag for the route (by > checking ip_check_mc). > > Signed-off-by: Veaceslav Falico <vfalico@xxxxxxxxxx> David, please take a look at this. Thanks. > diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c > index 1fd3d9c..b14f371 100644 > --- a/net/ipv4/igmp.c > +++ b/net/ipv4/igmp.c > @@ -1775,9 +1775,6 @@ static void ip_mc_clear_src(struct ip_mc_list *pmc) > kfree(psf); > } > pmc->sources = NULL; > - pmc->sfmode = MCAST_EXCLUDE; > - pmc->sfcount[MCAST_INCLUDE] = 0; > - pmc->sfcount[MCAST_EXCLUDE] = 1; > } > > -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
