pid: add pidfd_prepare()

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Add a new helper that allows to reserve a pidfd and allocates a new
pidfd file that stashes the provided struct pid. This will allow us to
remove places that either open code this function or that call
pidfd_create() but then have to call close_fd() because there are still
failure points after pidfd_create() has been called.

Reviewed-by: Jan Kara <jack@suse.cz>
Message-Id: <20230327-pidfd-file-api-v1-1-5c0e9a3158e4@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>

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Christian Brauner 2023-03-27 20:22:51 +02:00

parent 197b6b60ae

commit 6ae930d9db

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3 changed files with 93 additions and 12 deletions

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include/linux/pid.h

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