On Wed, Jul 16, 2025 at 5:29 AM Simon Horman <ho...@kernel.org> wrote:
>
> + Xin Long
>
Thanks for Ccing me.
> On Wed, Jul 16, 2025 at 08:26:05AM +0800, Li Tian wrote:
> > Set an additional flag IFF_NO_ADDRCONF to prevent ipv6 addrconf.
> >
> > Commit under Fixes added a new flag change that was not made
> > to hv_netvsc resulting in the VF being assinged an IPv6.
> >
> > Fixes: 8a321cf7becc ("net: add IFF_NO_ADDRCONF and use it in bonding to
> > prevent ipv6 addrconf")
> > Suggested-by: Cathy Avery <cav...@redhat.com>
> > Signed-off-by: Li Tian <lit...@redhat.com>
> > ---
> > v3:
> > - only fixes commit message.
> > v2: https://lore.kernel.org/netdev/20250710024603.10162-1-lit...@redhat.com/
> > - instead of replacing flag, add it.
> > v1: https://lore.kernel.org/netdev/20250710024603.10162-1-lit...@redhat.com/
> > ---
> > drivers/net/hyperv/netvsc_drv.c | 5 ++++-
> > 1 file changed, 4 insertions(+), 1 deletion(-)
>
> Hi Li Tian,
>
> Thanks for addressing earlier feedback.
>
> I don't think you need to repost because of this, but for future reference:
>
> 1. Because this is a fix for a commit that is present in net
> it should be targeted at that tree.
>
> Subject: [PATCH net vX] ...
>
> 2. Please use get_maintainers.pl this.patch to generate the CC list. In
> this case Xin Long (now CCed) should be included as he is the author of the
> patch cited in the Fixes tag.
>
> b4 can help you with this and other aspects of patch management.
>
> >
> > diff --git a/drivers/net/hyperv/netvsc_drv.c
> > b/drivers/net/hyperv/netvsc_drv.c
> > index c41a025c66f0..8be9bce66a4e 100644
> > --- a/drivers/net/hyperv/netvsc_drv.c
> > +++ b/drivers/net/hyperv/netvsc_drv.c
> > @@ -2317,8 +2317,11 @@ static int netvsc_prepare_bonding(struct net_device
> > *vf_netdev)
> > if (!ndev)
> > return NOTIFY_DONE;
> >
> > - /* set slave flag before open to prevent IPv6 addrconf */
> > + /* Set slave flag and no addrconf flag before open
> > + * to prevent IPv6 addrconf.
> > + */
> > vf_netdev->flags |= IFF_SLAVE;
> > + vf_netdev->priv_flags |= IFF_NO_ADDRCONF;
If it is only to prevent IPv6 addrconf, I think you can replace IFF_SLAVE
with IFF_NO_ADDRCONF.
IFF_SLAVE normally comes with IFF_MASTER, like bonding and eql.
I don't see IFF_MASTER used in netvsc_drv.c, so IFF_SLAVE probably
should be dropped, including the one in __netvsc_vf_setup()?
> > return NOTIFY_DONE;
> > }
> >
> > --
> > 2.50.0
> >
> >
