Re: [patch 2/2][NETNS45][V3] remove timewait sockets at cleanup

["Denis V. Lunev" <den-3ImXcnM4P+0@public.gmane.org>]

Daniel Lezcano wrote:
> From: Daniel Lezcano <dlezcano-NmTC/0ZBporQT0dZR+AlfA@public.gmane.org>
> 
> Denis Lunev spotted that if we take a reference to the network namespace
> with the timewait sockets, we will need to wait for their expiration to
> have the network namespace freed. This is a waste of time, the timewait
> sockets are for avoiding to receive a duplicate packet from the network,
> if the network namespace is freed, the network stack is removed, so no
> chance to receive any packets from the outside world.
> 
> This patchset remove/destroy the timewait sockets when the
> network namespace is freed.
> 
> The exit method registered by netns_register_subsys is put in the tcp.c
> file and not in inet_timewait_sock.c. The reasons are we browse the tcp
> established hash table and I don't want to add references to tcp in inet
> timewait sockets and, furthermore, dccp protocol uses the inet timewait 
> sock too. IMHO, if we status to cleanup dccp timewait too, we should add
> a exit method in dccp file.
> 
> Signed-off-by: Daniel Lezcano <dlezcano-NmTC/0ZBporQT0dZR+AlfA@public.gmane.org>
Signed-off-by: Denis V. Lunev <den-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org>