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 X-Spam-Level: X-Spam-Status: No, score=-11.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 16BC4C388F9 for ; Sat, 21 Nov 2020 23:40:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C692220A8B for ; Sat, 21 Nov 2020 23:40:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="H6ziNHrA" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726536AbgKUXTy (ORCPT ); Sat, 21 Nov 2020 18:19:54 -0500 Received: from mail.kernel.org ([198.145.29.99]:54870 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726176AbgKUXTx (ORCPT ); Sat, 21 Nov 2020 18:19:53 -0500 Received: from kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com (unknown [163.114.132.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 55A9921D46; Sat, 21 Nov 2020 23:19:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1606000793; bh=ybs2YhYmDs/f8E56sygvXFyrNxO4LzNuJCKiFRCMPTY=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=H6ziNHrAzFxFhyETUoA6SH+RR+7J/bFF+jv3Ha2H9o4YgVl60jUuvbWd+HhM2og+0 1L51wThSab4XMB89+1fenT0/QjmKp5nImWcCaRVl5WRNLmKzZ5cSePnDE/2EadDlXT UEg9+zifHxiH/tO9NjE3KPMtyDA9nBoymy2L1fXg= Date: Sat, 21 Nov 2020 15:19:52 -0800 From: Jakub Kicinski To: Jens Axboe Cc: Networking Subject: Re: [PATCH] tun: honor IOCB_NOWAIT flag Message-ID: <20201121151952.6a0d9c46@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com> In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Fri, 20 Nov 2020 07:59:54 -0700 Jens Axboe wrote: > tun only checks the file O_NONBLOCK flag, but it should also be checking > the iocb IOCB_NOWAIT flag. Any fops using ->read/write_iter() should check > both, otherwise it breaks users that correctly expect O_NONBLOCK semantics > if IOCB_NOWAIT is set. > > Cc: stable@vger.kernel.org > Signed-off-by: Jens Axboe Applied, thanks!