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From: Florian Weimer <fweimer@redhat.com>
To: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Tycho Andersen <tycho@tycho.pizza>,
	Christian Brauner <brauner@kernel.org>,
	Oleg Nesterov <oleg@redhat.com>,
	"Eric W . Biederman" <ebiederm@xmission.com>,
	linux-kernel@vger.kernel.org, linux-api@vger.kernel.org,
	Tycho Andersen <tandersen@netflix.com>
Subject: Re: [RFC 1/3] pidfd: allow pidfd_open() on non-thread-group leaders
Date: Thu, 30 Nov 2023 20:43:18 +0100	[thread overview]
Message-ID: <87ttp3rprd.fsf@oldenburg.str.redhat.com> (raw)
In-Reply-To: <a07b7ae6-8e86-4a87-9347-e6e1a0f2ee65@efficios.com> (Mathieu Desnoyers's message of "Thu, 30 Nov 2023 14:00:01 -0500")

* Mathieu Desnoyers:

>>> I'd like to offer a userspace API which allows safe stashing of
>>> unreachable file descriptors on a service thread.

>> By "safe" here do you mean not accessible via pidfd_getfd()?

No, unreachable by close/close_range/dup2/dup3.  I expect we can do an
intra-process transfer using /proc, but I'm hoping for something nicer.

Thanks,
Florian


  parent reply	other threads:[~2023-11-30 19:43 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-11-30 16:39 [RFC 1/3] pidfd: allow pidfd_open() on non-thread-group leaders Tycho Andersen
2023-11-30 16:39 ` [RFC 2/3] selftests/pidfd: add non-thread-group leader tests Tycho Andersen
2023-11-30 16:39 ` [RFC 3/3] clone: allow CLONE_THREAD | CLONE_PIDFD together Tycho Andersen
2023-11-30 17:39 ` [RFC 1/3] pidfd: allow pidfd_open() on non-thread-group leaders Oleg Nesterov
2023-11-30 17:56   ` Tycho Andersen
2023-12-01 16:31     ` Tycho Andersen
2023-12-07 17:57       ` Christian Brauner
2023-12-07 21:25         ` Christian Brauner
2023-12-08 20:04           ` Tycho Andersen
2023-11-30 18:37 ` Florian Weimer
2023-11-30 18:54   ` Tycho Andersen
2023-11-30 19:00     ` Mathieu Desnoyers
2023-11-30 19:17       ` Tycho Andersen
2023-11-30 19:43       ` Florian Weimer [this message]
2023-12-06 15:27         ` Tycho Andersen
2023-12-07 22:58         ` Christian Brauner
2023-12-08  3:16           ` Jens Axboe
2023-12-08 13:15           ` Florian Weimer
2023-12-08 13:48             ` Christian Brauner
2023-12-08 13:58               ` Florian Weimer
2023-12-07 17:21 ` Christian Brauner
2023-12-07 17:52   ` Tycho Andersen
2023-12-08 17:47   ` Jan Kara

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