Re: [PATCH 0/5 RFC] Add an interface to discover relationships between namespaces

From	"W. Trevor King" <wking@tremily.us>
Newsgroups	linux.kernel
Subject	Re: [PATCH 0/5 RFC] Add an interface to discover relationships between namespaces
Date	2016-07-26 20:40 +0200
Message-ID	<rZfqN-5ya-3@gated-at.bofh.it> (permalink)
References	(5 earlier) <rYPmF-5Ly-3@gated-at.bofh.it> <rYPPH-6aR-13@gated-at.bofh.it> <rZ5B8-7Yz-27@gated-at.bofh.it> <rZ5B8-7Yz-25@gated-at.bofh.it> <rZfqN-5ya-5@gated-at.bofh.it>
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On Tue, Jul 26, 2016 at 11:25:24AM -0700, Andrew Vagin wrote:
> Sure. If a process wants to compare two namespaces, it needs to get file
> descriptors for them (open /proc/PID/ns/XXX, use new ioctl-s, find a
> process which has them),
> and then it calls kcmp(pid1, pid2, KCMP_NSFD, ns_fd1, ns_fd2)

If you use the new ioctl-s to get ns_fd2, do you walk your local /proc
to find pid2?

Cheers,
Trevor

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Thread

Re: [PATCH 0/5 RFC] Add an interface to discover relationships  between namespaces "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2016-07-26 10:10 +0200
  Re: [PATCH 0/5 RFC] Add an interface to discover relationships  between namespaces "W. Trevor King" <wking@tremily.us> - 2016-07-26 20:40 +0200
  Re: [PATCH 0/5 RFC] Add an interface to discover relationships  between namespaces "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2016-07-26 21:20 +0200
    Re: [PATCH 0/5 RFC] Add an interface to discover relationships  between namespaces "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2016-07-28 12:50 +0200
      Re: [PATCH 0/5 RFC] Add an interface to discover relationships between namespaces ebiederm@xmission.com (Eric W. Biederman) - 2016-07-28 15:20 +0200
        Re: [PATCH 0/5 RFC] Add an interface to discover relationships  between namespaces "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2016-07-28 21:10 +0200
          Re: [PATCH 0/5 RFC] Add an interface to discover relationships between namespaces ebiederm@xmission.com (Eric W. Biederman) - 2016-07-29 20:20 +0200
            Re: [PATCH 0/5 RFC] Add an interface to discover relationships  between namespaces "Michael Kerrisk (man-pages)" <mtk.manpages@gmail.com> - 2016-07-31 23:40 +0200

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