linux-kernel - Re: [PATCH v2 2/2] pidfd: change pidfd_send_signal() to respect PIDFD

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Date: Fri, 9 Feb 2024 12:08:54 -0700
From: Tycho Andersen <tycho@...ho.pizza>
To: Oleg Nesterov <oleg@...hat.com>
Cc: Christian Brauner <brauner@...nel.org>,
	Andy Lutomirski <luto@...capital.net>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	linux-api@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/2] pidfd: change pidfd_send_signal() to respect
 PIDFD_THREAD

On Fri, Feb 09, 2024 at 02:06:50PM +0100, Oleg Nesterov wrote:
> Turn kill_pid_info() into kill_pid_info_type(), this allows to pass any
> pid_type to group_send_sig_info(), despite its name it should work fine
> even if type = PIDTYPE_PID.
> 
> Change pidfd_send_signal() to use PIDTYPE_PID or PIDTYPE_TGID depending
> on PIDFD_THREAD.
> 
> While at it kill another TODO comment in pidfd_show_fdinfo(). As Christian
> expains fdinfo reports f_flags, userspace can already detect PIDFD_THREAD.
> 
> Signed-off-by: Oleg Nesterov <oleg@...hat.com>

Reviewed-by: Tycho Andersen <tandersen@...flix.com>