From patchwork Fri Oct 21 10:16:40 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pavel Begunkov X-Patchwork-Id: 13014576 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 0B9C4C43219 for ; Fri, 21 Oct 2022 10:19:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230486AbiJUKT1 (ORCPT ); Fri, 21 Oct 2022 06:19:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47456 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230123AbiJUKSt (ORCPT ); Fri, 21 Oct 2022 06:18:49 -0400 Received: from mail-wm1-x32d.google.com (mail-wm1-x32d.google.com [IPv6:2a00:1450:4864:20::32d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 345662413E4; Fri, 21 Oct 2022 03:18:41 -0700 (PDT) Received: by mail-wm1-x32d.google.com with SMTP id c3-20020a1c3503000000b003bd21e3dd7aso4675232wma.1; Fri, 21 Oct 2022 03:18:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=M2LfrtTV1vRKc7J7VJ5UwaKJfx82Qm1fvaWqDX51XpU=; b=VfwUVkR/Cnq8Ix+NAH+WJ3Qp07261Kqnye9ofG37njZ3mhGP5i90wRwkrSZmUFvBrq 7qpalCNbeA7zRDAplaFY7Uxk6fVXxLdqE838IIv9PeauMVvOuocl1z+bO6A4Kwgr9fr1 r7sHxE+koFFFC/cvTMVJgk0hnvLYPB2AXSoWG2XE5bKQqe+EgQkpsp9o3krdmG/tL3uX NosuNfUkQTiFiA4Vi5P81SL7AV+sCtJZesU3vgQIeqlbqxR4igh8IpQ5qZRZR69o5PwS TzKWHOldo62wJnLKMbUbR6b86clvzh6l43WpmIU41M+TVOtU2ucC0UnGCii0OOR5eYWq sKZg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=M2LfrtTV1vRKc7J7VJ5UwaKJfx82Qm1fvaWqDX51XpU=; b=C1iWTekz/BX9e4Nh6dCSQLAYi3USvR+Wu21z6rK3bndE8+diLABsMkDCXEAfLO7EFU hI3seHWVpaLnm6vprHbyUWR1qxhJ4jc2rhdmPfb266Xm8MvkK0Zl+GqL8AxpsvRrJD15 F3HZdaen0XdWAJScqYH4fr4kdKdpasW9uh/jrD3/FGfb11RK+DGdvQJ+xVJ0lwtITB9s RvthUGUvmq6PfLITpofrxWy7Qc2ne+Frzhfx66lwF0Wh1O8B93qPVjTPu/JQdL8Qs6LF h6A3w5QRsIxuN/XmAOjKGBIvpVc728ZlVol3DjFvcgkHzOZclvqMC5Uz4Zeo+v5YG1r2 sjsA== X-Gm-Message-State: ACrzQf1Dub7vBXqD86sxWhPN1rohj5VJbXFFaRgCuiYwHnS2UTOneDh7 Id9utNXNn4pzqXnEobFU7K5S3npY4vk= X-Google-Smtp-Source: AMsMyM7RYUkfL2yfkxUORjlpQxQfc8xn2EZhWU3TJsiP/2OGqD1DJyATIfGrO9bJZiQyANyRhrVO0Q== X-Received: by 2002:a05:600c:ad7:b0:3c6:facf:1f5f with SMTP id c23-20020a05600c0ad700b003c6facf1f5fmr15552036wmr.171.1666347518942; Fri, 21 Oct 2022 03:18:38 -0700 (PDT) Received: from 127.0.0.1localhost.com ([2620:10d:c092:600::2:f27e]) by smtp.gmail.com with ESMTPSA id ba3-20020a0560001c0300b002365254ea42sm1565184wrb.1.2022.10.21.03.18.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 21 Oct 2022 03:18:38 -0700 (PDT) From: Pavel Begunkov To: Jens Axboe , Jakub Kicinski , Paolo Abeni , "David S . Miller" Cc: io-uring@vger.kernel.org, asml.silence@gmail.com, netdev@vger.kernel.org, Stefan Metzmacher Subject: [PATCH for-6.1 2/3] io_uring/net: fail zc send when unsupported by socket Date: Fri, 21 Oct 2022 11:16:40 +0100 Message-Id: <2db3c7f16bb6efab4b04569cd16e6242b40c5cb3.1666346426.git.asml.silence@gmail.com> X-Mailer: git-send-email 2.38.0 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org If a protocol doesn't support zerocopy it will silently fall back to copying. This type of behaviour has always been a source of troubles so it's better to fail such requests instead. Cc: # 6.0 Signed-off-by: Pavel Begunkov --- io_uring/net.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/io_uring/net.c b/io_uring/net.c index 8c7226b5bf41..26ff3675214d 100644 --- a/io_uring/net.c +++ b/io_uring/net.c @@ -1056,6 +1056,8 @@ int io_send_zc(struct io_kiocb *req, unsigned int issue_flags) sock = sock_from_file(req->file); if (unlikely(!sock)) return -ENOTSOCK; + if (!test_bit(SOCK_SUPPORT_ZC, &sock->flags)) + return -EOPNOTSUPP; msg.msg_name = NULL; msg.msg_control = NULL;