Re: [PATCH net] ipv6: Add NETCONFA_FORCE_FORWARDING to netconf messages

[Ido Schimmel]

On Fri, Oct 23, 2026 at 12:59:18PM +0200, Gabriel Goller wrote:
> Since force_forwarding was added, changing the sysctl sends an
> RTM_NEWNETCONF notification of type NETCONFA_FORCE_FORWARDING, but
> inet6_netconf_fill_devconf() never emits the attribute. Listeners only
> receive NETCONFA_IFINDEX without the new value, and RTM_GETNETCONF
> replies and dumps omit it as well.
> 
> Fixes: f24987ef6959 ("ipv6: add `force_forwarding` sysctl to enable per-interface forwarding")
> Signed-off-by: Gabriel Goller <g.goller@xxxxxxxxxxx>

This seems to fall under the "Not a regression, not critical" category
[1], so can wait for net-next.

Also, NETCONFA_FORCE_FORWARDING is not emitted when it's disabled as
part of:

sysctl -wq net.ipv6.conf.all.forwarding=0

Is this intentional?

[1] https://lore.kernel.org/netdev/CAHk-=wiSnTE9vBZ=5_v+3EEkdazCCbBM5YABRzRHUAeRdyd4Xw@xxxxxxxxxxxxxx/