On Fri, Jun 19, 2015 at 06:52:00AM -0700, Eric Dumazet wrote:
> On Fri, 2015-06-19 at 14:15 +0200, Phil Sutter wrote:
> > For AF_INET6 sockets, the value of struct ipv6_pinfo.ipv6only is
> > exported to userspace. It indicates whether an unbound socket listens on
> > IPv4 as well as IPv6.
> 
> What is an 'unbound socket' ??? This makes no sense to me here.

Indeed, this is just plain wrong. Actually meant "not bound to a
specific IPv6 address".

> >  Since the socket is natively IPv6, it is not
> > listed by e.g. 'netstat -l -4'.
> 
> netstat does not use this interface. iproute2/ss does.

Just used this as a simple example illustrating the problem, but doing
the same with 'ss' is truly a better choice.

[...]

> 1) This certainly should not compile on current linux trees.
>    Always submit such patches on net-next.

It cleanly applies to net.git.

> 2) It is not clear why we would add this attribute if it is 0.
>     This looks a waste of data.
> 
> So I would rather use :

ACK. Thanks for reviewing, v2 follows after I've tested it.

Cheers, Phil
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