linux-kernel - Re: [PATCH v9 1/2] fork: extend clone3() to support setting a PID

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Message-ID: <20191114081359.axnoioa25grf3ffv@wittgenstein>
Date:   Thu, 14 Nov 2019 09:14:00 +0100
From:   Christian Brauner <christian.brauner@...ntu.com>
To:     Adrian Reber <areber@...hat.com>
Cc:     Eric Biederman <ebiederm@...ssion.com>,
        Pavel Emelyanov <ovzxemul@...il.com>,
        Jann Horn <jannh@...gle.com>, Oleg Nesterov <oleg@...hat.com>,
        Dmitry Safonov <0x7f454c46@...il.com>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        linux-kernel@...r.kernel.org, Andrei Vagin <avagin@...il.com>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Radostin Stoyanov <rstoyanov1@...il.com>
Subject: Re: [PATCH v9 1/2] fork: extend clone3() to support setting a PID

On Thu, Nov 14, 2019 at 08:07:08AM +0100, Adrian Reber wrote:
>   * The structure is versioned by size and thus extensible.
>   * New struct members must go at the end of the struct and
> @@ -71,6 +85,8 @@ struct clone_args {
>  	__aligned_u64 stack;
>  	__aligned_u64 stack_size;
>  	__aligned_u64 tls;
> +	__aligned_u64 set_tid;
> +	__aligned_u64 set_tid_size;

Oh, one thing that is missing is the addition of

+#define CLONE_ARGS_SIZE_VER1 80 /* sizeof second published struct */

in sched.h. Please add that, when you resend.

Thanks!
Christian