Re: [PATCH] net: skip genenerating uevents for network namespaces that are exiting

From	Andrey Vagin <avagin@openvz.org>
Newsgroups	linux.kernel
Subject	Re: [PATCH] net: skip genenerating uevents for network namespaces that are exiting
Date	2016-10-22 09:40 +0200
Message-ID	<suZ4m-oy-3@gated-at.bofh.it> (permalink)
References	<suy49-7Wf-31@gated-at.bofh.it> <suyxb-8lc-5@gated-at.bofh.it> <suAz0-1dh-9@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Hi Cong,

On Thu, Oct 20, 2016 at 10:25 PM, Andrey Vagin <avagin@openvz.org> wrote:
> On Thu, Oct 20, 2016 at 8:10 PM, Cong Wang <xiyou.wangcong@gmail.com> wrote:
>> On Thu, Oct 20, 2016 at 7:46 PM, Andrei Vagin <avagin@openvz.org> wrote:
>>> No one can see these events, because a network namespace can not be
>>> destroyed, if it has sockets.
>>>
>>
>> Are you sure? kobject_uevent_env() seems sending uevents to all
>> network namespaces.
>
> kobj_bcast_filter() checks that a kobject namespace is equal to a
> socket namespace.

Today I've checked that it really works as I read from the source code.
I use this tool to read events:
https://gist.github.com/avagin/430ba431fc2972002df40ebe6a048b36

And I see that events from non-network devices are delivered to all sockets,
but events from network devices are delivered only to sockets from
a network namespace where a device is operated.

Thanks,
Andrei

>
>
>> _______________________________________________
>> Containers mailing list
>> Containers@lists.linux-foundation.org
>> https://lists.linuxfoundation.org/mailman/listinfo/containers

Thread

[PATCH] net: skip genenerating uevents for network namespaces that are exiting Andrei Vagin <avagin@openvz.org> - 2016-10-21 04:50 +0200
  Re: [PATCH] net: skip genenerating uevents for network namespaces  that are exiting Cong Wang <xiyou.wangcong@gmail.com> - 2016-10-21 05:20 +0200
    Re: [PATCH] net: skip genenerating uevents for network namespaces  that are exiting Andrey Vagin <avagin@openvz.org> - 2016-10-21 07:30 +0200
      Re: [PATCH] net: skip genenerating uevents for network namespaces  that are exiting Andrey Vagin <avagin@openvz.org> - 2016-10-22 09:40 +0200
        Re: [PATCH] net: skip genenerating uevents for network namespaces  that are exiting Cong Wang <xiyou.wangcong@gmail.com> - 2016-10-24 19:20 +0200
  Re: [PATCH] net: skip genenerating uevents for network namespaces  that are exiting David Miller <davem@davemloft.net> - 2016-10-22 23:10 +0200

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