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 D4B05C433EF for ; Sun, 12 Jun 2022 09:01:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235501AbiFLJBC (ORCPT ); Sun, 12 Jun 2022 05:01:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40436 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235259AbiFLJAv (ORCPT ); Sun, 12 Jun 2022 05:00:51 -0400 Received: from mail-wm1-x32b.google.com (mail-wm1-x32b.google.com [IPv6:2a00:1450:4864:20::32b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 35A21517F8 for ; Sun, 12 Jun 2022 02:00:49 -0700 (PDT) Received: by mail-wm1-x32b.google.com with SMTP id l126-20020a1c2584000000b0039c1a10507fso1611652wml.1 for ; Sun, 12 Jun 2022 02:00:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fastly.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=QEsnoS6fs7x7z63+N74TXGO62/r4Rll/JtLDyGKeftw=; b=RyVH1BNMS71kJucK5zElSTO/iNUJtJ1wzfB62MK2wkxOOJQg/HG4FYnSYIx5b28jtI c1Wk6gsCMqqP+0DlffzZlNALt2iyg5mxWghT7RpQ3Yotns8G4e/n7SJRzvMrjiCaxae/ PUMD95tfWDtLUEIwDO+4QJirah2khGY715i+g= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=QEsnoS6fs7x7z63+N74TXGO62/r4Rll/JtLDyGKeftw=; b=hwi7cQobWqNWP9l6IoP/vVZgioUgfJOhE48HpO2EV6SYwBnuMDixcUuNWh+A9hz3RW 9Gi2mCwzWVoR375r2ptizr5inmJQy36RGob9jnAgM97lmgVmXOYeN0GqAbuk1JOq4KKD qRZKttDKqUDTaRbv26xkHtbxkKp/Kq1Ry3E82n7vIpwCQw575TzTqcWOJbMITsYHJXjc gzvxt1hyzz3rvwT8n4ADLFggNkRFefjbd77PxbAsrGDsM116dKXYXc2qLtAmKadl2lp/ xj0Rq2esJDYn5t3ctmZtEaa1U1JxsneY3+YaPhp2e2MLVdmW8DPccFL3Z0BSdDkIYTj7 iBmQ== X-Gm-Message-State: AOAM533MxchnR5i7tXVQGfIjHY3Sl//lS10UGY7zM3FglgxFTNNAhsGY Z3zwMgLgsrp3I5IbXmLyLJLWVA== X-Google-Smtp-Source: ABdhPJwXZyVpsGAIc5rt4KdnvnyW5tPEH0k/SyiM2mkjkdzxtxUdKAXvWaJOWLmn6Fb+SsUMSvmc1g== X-Received: by 2002:a05:600c:4e94:b0:39c:81fd:6594 with SMTP id f20-20020a05600c4e9400b0039c81fd6594mr8030223wmq.198.1655024448441; Sun, 12 Jun 2022 02:00:48 -0700 (PDT) Received: from localhost.localdomain ([178.130.153.185]) by smtp.gmail.com with ESMTPSA id d34-20020a05600c4c2200b0039c5b4ab1b0sm4798603wmp.48.2022.06.12.02.00.45 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sun, 12 Jun 2022 02:00:47 -0700 (PDT) From: Joe Damato To: "David S. Miller" , Hideaki YOSHIFUJI , David Ahern , Eric Dumazet , Jakub Kicinski , Paolo Abeni , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Joe Damato Subject: [RFC,net-next v2 6/8] net: ip: Support MSG_NTCOPY Date: Sun, 12 Jun 2022 01:57:55 -0700 Message-Id: <1655024280-23827-7-git-send-email-jdamato@fastly.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1655024280-23827-1-git-send-email-jdamato@fastly.com> References: <1655024280-23827-1-git-send-email-jdamato@fastly.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Support nontemporal copies of IP data when applications set the MSG_NTCOPY flag and checksumming is offloaded. ip_generic_getfrag is used by UDP and raw sockets, so this change effectively enables MSG_NTCOPY support for both. Signed-off-by: Joe Damato --- net/ipv4/ip_output.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c index 00b4bf2..75c8627 100644 --- a/net/ipv4/ip_output.c +++ b/net/ipv4/ip_output.c @@ -933,6 +933,7 @@ ip_generic_getfrag(void *from, char *to, int offset, int len, int odd, struct sk struct msghdr *msg = from; if (skb->ip_summed == CHECKSUM_PARTIAL) { + msg_set_iter_copy_type(msg); if (!copy_from_iter_full(to, len, &msg->msg_iter)) return -EFAULT; } else { -- 2.7.4