linux-kernel - Re: [PATCH] nsproxy: attach to namespaces via pidfds

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Date:   Mon, 27 Apr 2020 10:21:55 -0500
From:   ebiederm@...ssion.com (Eric W. Biederman)
To:     Christian Brauner <christian.brauner@...ntu.com>
Cc:     linux-kernel@...r.kernel.org,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Stéphane Graber <stgraber@...ntu.com>,
        Linux Containers <containers@...ts.linux-foundation.org>,
        Serge Hallyn <serge@...lyn.com>,
        Aleksa Sarai <cyphar@...har.com>
Subject: Re: [PATCH] nsproxy: attach to namespaces via pidfds

I am still catching up on the what exists for pidfd.  Do you have a way
to safely go from a pidfd to the corresponding proc directory?

That would make this setns work just an optimization.  A nice one but
just an optimization.

Eric