Re: [PATCH net-next] ipv4: enable route flushing in network namespaces

[David Ahern]

On 6/24/19 7:29 AM, Christian Brauner wrote:
> Tools such as vpnc try to flush routes when run inside network
> namespaces by writing 1 into /proc/sys/net/ipv4/route/flush. This
> currently does not work because flush is not enabled in non-initial
> network namespaces.
> Since routes are per network namespace it is safe to enable
> /proc/sys/net/ipv4/route/flush in there.
> 
> Link: https://github.com/lxc/lxd/issues/4257
> Signed-off-by: Christian Brauner <christian.brauner@xxxxxxxxxx>
> ---
>  net/ipv4/route.c | 12 ++++++++----
>  1 file changed, 8 insertions(+), 4 deletions(-)
> 

why not teach vpnc to use rtnetlink and then add a flush option to
RTM_DELROUTE?