From: Jiri Benc <jbenc@redhat.com>
To: Rick Jones <rick.jones2@hp.com>
Cc: Ani Sinha <ani@arista.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>
Subject: Re: list of all network namespaces
Date: Thu, 17 Sep 2015 11:40:59 +0200 [thread overview]
Message-ID: <20150917114059.33431bbc@griffin> (raw)
In-Reply-To: <55FA0F4A.3010105@hp.com>
On Wed, 16 Sep 2015 17:54:34 -0700, Rick Jones wrote:
> On 09/16/2015 05:46 PM, Ani Sinha wrote:
> > just a stupid question. Is it possible to get a list of all active
> > network namespaces in the kernel through /proc or some other
> > interface?
Not reliably and not efficiently. You can look at what plotnetcfg does:
https://github.com/jbenc/plotnetcfg/blob/master/netns.c
> Presumably you could copy what "ip netns" does, which appears to be to
> look in /var/run/netns . At least that is what an strace of that
> command suggests.
That only works for namespaces added by the ip tool (and presumably a
few other tools which leave a symlink in /var/run/netns as a courtesy).
Depending on what you need, it may be enough. Be aware that you won't
find all net namespaces in the system this way, though.
Jiri
--
Jiri Benc
next prev parent reply other threads:[~2015-09-17 9:41 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-17 0:46 list of all network namespaces Ani Sinha
2015-09-17 0:54 ` Rick Jones
2015-09-17 9:40 ` Jiri Benc [this message]
2015-09-17 9:46 ` Nicolas Dichtel
2015-09-17 9:51 ` Rosen, Rami
2015-09-17 17:39 ` Ani Sinha
2015-09-17 18:11 ` Cong Wang
2015-09-17 18:14 ` Jiri Benc
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