pidfs: allow to retrieve exit information

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Some tools like systemd's jounral need to retrieve the exit and cgroup
information after a process has already been reaped. This can e.g.,
happen when retrieving a pidfd via SCM_PIDFD or SCM_PEERPIDFD.

Link: https://lore.kernel.org/r/20250305-work-pidfs-kill_on_last_close-v3-6-c8c3d8361705@kernel.org
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>

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Christian Brauner 2025-03-05 11:08:16 +01:00

parent 4513522984

commit 7477d7dce4

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2 changed files with 70 additions and 19 deletions

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86

fs/pidfs.c

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3

include/uapi/linux/pidfd.h

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