> -----Original Message-----
> From: Li Tian <[email protected]>
> Sent: Wednesday, July 9, 2025 10:46 PM
> To: [email protected]; [email protected]
> Cc: [email protected]; Haiyang Zhang <[email protected]>;
> Dexuan Cui <[email protected]>
> Subject: [EXTERNAL] [PATCH] hv_netvsc: Set VF priv_flags to
> IFF_NO_ADDRCONF before open to prevent IPv6 addrconf
>
> The use of the IFF_SLAVE flag was replaced by IFF_NO_ADDRCONF to
> prevent ipv6 addrconf.
>
> Commit 8a321cf7becc6c065ae595b837b826a2a81036b9
> ("net: add IFF_NO_ADDRCONF and use it in bonding to prevent ipv6
> addrconf")
>
> This new flag change was not made to hv_netvsc resulting in the VF being
> assinged an IPv6.
>
> Suggested-by: Cathy Avery <[email protected]>
>
> Signed-off-by: Li Tian <[email protected]>
> ---
> drivers/net/hyperv/netvsc_drv.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/hyperv/netvsc_drv.c
> b/drivers/net/hyperv/netvsc_drv.c
> index c41a025c66f0..a31521f00681 100644
> --- a/drivers/net/hyperv/netvsc_drv.c
> +++ b/drivers/net/hyperv/netvsc_drv.c
> @@ -2317,8 +2317,8 @@ static int netvsc_prepare_bonding(struct net_device
> *vf_netdev)
> if (!ndev)
> return NOTIFY_DONE;
>
> - /* set slave flag before open to prevent IPv6 addrconf */
> - vf_netdev->flags |= IFF_SLAVE;
> + /* Set no addrconf flag before open to prevent IPv6 addrconf */
> + vf_netdev->priv_flags |= IFF_NO_ADDRCONF;
The IFF_SLAVE flag is still needed for our user mode, and udev rules to work.
So please keep it. (you may update the comment though).
cc: Long Li <[email protected]>
@Long Li
Thanks,
- Haiyang
