From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 61EDBC7EE2E for ; Mon, 12 Jun 2023 09:26:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231737AbjFLJ0Y (ORCPT ); Mon, 12 Jun 2023 05:26:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44216 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234988AbjFLJZV (ORCPT ); Mon, 12 Jun 2023 05:25:21 -0400 Received: from mail-qt1-x82d.google.com (mail-qt1-x82d.google.com [IPv6:2607:f8b0:4864:20::82d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EF0193C15 for ; Mon, 12 Jun 2023 02:19:39 -0700 (PDT) Received: by mail-qt1-x82d.google.com with SMTP id d75a77b69052e-3f9a81da5d7so314961cf.0 for ; Mon, 12 Jun 2023 02:19:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1686561579; x=1689153579; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=9+9DO9QvRcGmz6N/mHMV0b4yXmnNikrhC006i06Umx0=; b=cqk//FV3ozIay6AgBNV5ob1IDy2+IOpYTfQi6FcibkQDiT/uOOWw5DYoOxBe5QSMDk BMk3XiRl+yus4FWheCEWRwNUsEPhfCjmqUvZVJF6Nm820rpz0mQQvvAbWi0+3j4kzTme p5MwCU3ZIrIvExqTao/NqZ+v+X0VWL4WXY3Zey77F0JOE3os2m3q5NUe/u5/kedBM7pN Ukz79VjzETQ3uce0SO4JmCYXK4ICfW1MuWGdzHNftYaGOQH+ZB7ICyIi64LOyTq+Bza7 jSVvBo0w/U935/0Q2u5m11awIybDHitnEjlHWwCWcES82RFO0ZwSFBlHxsVdECTWxLdl +GEQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686561579; x=1689153579; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=9+9DO9QvRcGmz6N/mHMV0b4yXmnNikrhC006i06Umx0=; b=TgLgzr1fZfEBzKpFLo7xKnU5St2YBTCx1/Wm48CHtNpDrUpZ3MG0wMYSPPSEqTpD6o 0BQMiQ9kl03+CL7cahz4PwHPz4zbgwRLcn1q7/itAfVcaDErGB8k02ia1bfesZ0+HbQf nvUJmm2AcKzA9bOB2gu9bBzkgpeuri2phjoGSDBMSQyl4HZapB4W+2ItAOh7iuGWFwr+ Dy8L/apWOza3TGA7IxQ+MZseRTCBBEtiwSiP9XWdAa61CAaMyGqHb75xgwDUEVi33wPd S/VpFmR7ShzvRzhwvD3xKPnKZwZXR23DY+VFDtI/rvaW81ISOYHNQRhlNY1dck+XrQGp T37w== X-Gm-Message-State: AC+VfDwZLc4iAU7S6OTZtpMR4PU+gFHrde8RqvXmypQa/vmQqu1OLfDS 7VpLvNAgVDq2g54px6IguMUwmPZTjL1grbQGoKKY3Q== X-Google-Smtp-Source: ACHHUZ6LI9YR9875qLIDvFSYBsHw1lc1NTBArmTCYMoCsG/VIQfxhlpZWokElhVbYmiE7Ww2KbVzZ7HLqQig6PHW0h0= X-Received: by 2002:a05:622a:14c7:b0:3f6:97b4:1a4d with SMTP id u7-20020a05622a14c700b003f697b41a4dmr219703qtx.23.1686561578849; Mon, 12 Jun 2023 02:19:38 -0700 (PDT) MIME-Version: 1.0 References: <20230608202628.837772-1-aleksandr.mikhalitsyn@canonical.com> <20230608202628.837772-2-aleksandr.mikhalitsyn@canonical.com> In-Reply-To: <20230608202628.837772-2-aleksandr.mikhalitsyn@canonical.com> From: Eric Dumazet Date: Mon, 12 Jun 2023 11:19:27 +0200 Message-ID: Subject: Re: [PATCH net-next v7 1/4] scm: add SO_PASSPIDFD and SCM_PIDFD To: Alexander Mikhalitsyn Cc: davem@davemloft.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, Jakub Kicinski , Paolo Abeni , Leon Romanovsky , David Ahern , Arnd Bergmann , Kees Cook , Christian Brauner , Kuniyuki Iwashima , Lennart Poettering , Luca Boccassi , linux-arch@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jun 8, 2023 at 10:26=E2=80=AFPM Alexander Mikhalitsyn wrote: > > Implement SCM_PIDFD, a new type of CMSG type analogical to SCM_CREDENTIAL= S, > but it contains pidfd instead of plain pid, which allows programmers not > to care about PID reuse problem. > > We mask SO_PASSPIDFD feature if CONFIG_UNIX is not builtin because > it depends on a pidfd_prepare() API which is not exported to the kernel > modules. > > Idea comes from UAPI kernel group: > https://uapi-group.org/kernel-features/ > > Big thanks to Christian Brauner and Lennart Poettering for productive > discussions about this. > > Cc: "David S. Miller" > Cc: Eric Dumazet > Cc: Jakub Kicinski > Cc: Paolo Abeni > Cc: Leon Romanovsky > Cc: David Ahern > Cc: Arnd Bergmann > Cc: Kees Cook > Cc: Christian Brauner > Cc: Kuniyuki Iwashima > Cc: Lennart Poettering > Cc: Luca Boccassi > Cc: linux-kernel@vger.kernel.org > Cc: netdev@vger.kernel.org > Cc: linux-arch@vger.kernel.org > Tested-by: Luca Boccassi > Reviewed-by: Kuniyuki Iwashima > Reviewed-by: Christian Brauner > Signed-off-by: Alexander Mikhalitsyn > --- Reviewed-by: Eric Dumazet