Re: [PATCH 5/5] ss: Show inet and unix sockets' shutdown state

[Eric Dumazet <eric.dumazet@gmail.com>]

On Thu, 2012-10-25 at 08:52 -0700, Stephen Hemminger wrote:
> On Thu, 25 Oct 2012 17:26:44 +0400
> Pavel Emelyanov <xemul@parallels.com> wrote:
> 
> > To see this we need kernel >=3.7 with _SHUTDOWN nlarrts in diag messages.
> > The output will look like arrows at the end of each line, like this:
> > 
> > ESTAB 0 0  127.0.0.1:41705  127.0.0.1:12345  ino:143321 sk:ffff88003a8cea00 -->
> > ESTAB 0 0  127.0.0.1:46925  127.0.0.1:12346  ino:143322 sk:ffff88003a8ce4c0 <--
> > ESTAB 0 0  127.0.0.1:51678  127.0.0.1:12347  ino:143323 sk:ffff88003a8cdf80 ---
> > ESTAB 0 0  127.0.0.1:46911  127.0.0.1:12348  ino:143324 sk:ffff88003b7f05c0 <->
> > 
> > for SHUT_RD, SHUT_WR, SHUT_RDWR and non-shutdown sockets respectively.
> > 
> > Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
> > 
> > ---
> >  include/linux/inet_diag.h |    3 ++-
> >  include/linux/unix_diag.h |    1 +
> >  misc/ss.c                 |   26 ++++++++++++++++++++------
> >  3 files changed, 23 insertions(+), 7 deletions(-)
> > 
> > diff --git a/include/linux/inet_diag.h b/include/linux/inet_diag.h
> > index 8c469af..bbde90f 100644
> > --- a/include/linux/inet_diag.h
> > +++ b/include/linux/inet_diag.h
> > @@ -109,9 +109,10 @@ enum {
> >  	INET_DIAG_TOS,
> >  	INET_DIAG_TCLASS,
> >  	INET_DIAG_SKMEMINFO,
> > +	INET_DIAG_SHUTDOWN,
> >  };
> 
> Since this requires 3.8 or later kernel, please resubmit this
> patch during that merge window.
> --

I am wondering what possibly could happen if applying this before ?

iproute2 should be non dependent on kernel version, we make sure to not
add regressions.