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

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Message-ID: <20121025100922.12ed2061@nehalam.linuxnetplumber.net>
Date:	Thu, 25 Oct 2012 10:09:22 -0700
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Pavel Emelyanov <xemul@...allels.com>,
	Linux Netdev List <netdev@...r.kernel.org>
Subject: Re: [PATCH 5/5] ss: Show inet and unix sockets' shutdown state

On Thu, 25 Oct 2012 18:53:30 +0200
Eric Dumazet <eric.dumazet@...il.com> wrote:

> On Thu, 2012-10-25 at 08:52 -0700, Stephen Hemminger wrote:
> > On Thu, 25 Oct 2012 17:26:44 +0400
> > Pavel Emelyanov <xemul@...allels.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@...allels.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.
> 
> 
> 

I don't want the stashed kernel headers to get out of date with kernel exported ones.

People who want to test early features are free to build their own pre-release versions.
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