Re: [PATCH net] ipv6/mcast: update mc_qrv when join new group

[Hangbin Liu]

On Fri, Oct 26, 2018 at 10:30:54AM +0800, Hangbin Liu wrote:
> Currently we only set mc_qrv to sysctl_mld_qrv when interface up. If we
> change sysctl_mld_qrv after interface up, it will has no effect.
> 
> Fix it by assigning latest sysctl_mld_qrv to idev mc_qrv when join new group.
> 
> Reported-by: Ying Xu <yi...@redhat.com>
> Signed-off-by: Hangbin Liu <liuhang...@gmail.com>

Hi David,

Any comments for this patch?

Thanks
Hangbin
> ---
>  net/ipv6/mcast.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
> index dbab62e..bed4890 100644
> --- a/net/ipv6/mcast.c
> +++ b/net/ipv6/mcast.c
> @@ -680,6 +680,7 @@ static void igmp6_group_added(struct ifmcaddr6 *mc)
>       if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT))
>               return;
>  
> +     mc->idev->mc_qrv = sysctl_mld_qrv;
>       if (mld_in_v1_mode(mc->idev)) {
>               igmp6_join_group(mc);
>               return;
> -- 
> 2.5.5
>