From patchwork Thu Mar 3 18:16:02 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Dumazet X-Patchwork-Id: 12767895 X-Patchwork-Delegate: kuba@kernel.org 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 7C13CC433EF for ; Thu, 3 Mar 2022 18:16:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235666AbiCCSRj (ORCPT ); Thu, 3 Mar 2022 13:17:39 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38422 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235673AbiCCSRd (ORCPT ); Thu, 3 Mar 2022 13:17:33 -0500 Received: from mail-pg1-x52f.google.com (mail-pg1-x52f.google.com [IPv6:2607:f8b0:4864:20::52f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 773651A41EC for ; Thu, 3 Mar 2022 10:16:45 -0800 (PST) Received: by mail-pg1-x52f.google.com with SMTP id 132so5246893pga.5 for ; Thu, 03 Mar 2022 10:16:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=m3R0BhiqPxOZEoq0u9oSqVsOJdu8BSFsUrtrIwkGaQ4=; b=oKtbaLz5QKuWnWU3PxkDEB15D3R1sAbAI5AD+CumwGA/Q1vUt+eLP1jT7rbBs7Tbwf vo2O76HmTqRsegBXV9pCE/EHF46ooDhm+y61Vc7lu0dP8d+W+Sd/G3tsMlppHKoQmyCC 71USNrkq7EEFxxga+GOrIG+wtPqJRhGUZoSy5OXFn64clXho0+ZOkI4sFGuWg2ptMGFy M9UHnBkQRVhFN8apa+dcYQcJ1zLyHBqa7h1RN1NEAC/wP4FOBpxgVESdy3U9PIrkq1z3 wnF/xWwceJ1IexaM5zYYOfIoSDM9J6+BrZltPgACXboz9H8qVZJiWsJ+KOR6F75lKeA0 xa9w== 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:mime-version:content-transfer-encoding; bh=m3R0BhiqPxOZEoq0u9oSqVsOJdu8BSFsUrtrIwkGaQ4=; b=6C5l0MMb9TAbxkCpNgIIyvW1dL22QfSvBnfnhdcCmajsOVvr3U2KzyHkGtjhjbVh7n XPHuLaYAp48uq/2V8JT0dRAwtR2Zvp8xpScPyO+OrzdNKpNl7gEg/fMW0RXdOQs7M9TQ XFIzT6UZKonuE8XpjlqFLGrxPDFleEyTAA33q6gm/MeMP/agP9UHGDLq7O1NIKcPFaoQ g84dHZRP/lDuUk+vJcuGuammh0GHTyPWNXd996KvUkX2XuYC6U7yM32ApHtCUJzerRWL xfC5iHnebWZWsuK87qn76sANu/TwlAUKc6ubgFOW/L4jRpA6K4/tTCNBtt57si9khwOJ utLg== X-Gm-Message-State: AOAM531cFWm8APLSTp2n/Nqpg/nBGXqGN3OaX7zPYfWqabrZkkUAZ5do xyZ2mumNjaEYYkNBzz+e1eE= X-Google-Smtp-Source: ABdhPJwmFeTdz1zJLdRSLA1+3IgLc6hew4SKRtMMIV+hzx1LCfpZtnW/HIvS4SNsPY2ojv07w2ASaA== X-Received: by 2002:a05:6a00:23d4:b0:4c9:f1b6:8e97 with SMTP id g20-20020a056a0023d400b004c9f1b68e97mr39166470pfc.27.1646331404984; Thu, 03 Mar 2022 10:16:44 -0800 (PST) Received: from edumazet1.svl.corp.google.com ([2620:15c:2c4:201:5388:c313:5e37:a261]) by smtp.gmail.com with ESMTPSA id u14-20020a17090adb4e00b001bee5dd39basm7611016pjx.1.2022.03.03.10.16.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 03 Mar 2022 10:16:44 -0800 (PST) From: Eric Dumazet To: "David S . Miller" , Jakub Kicinski Cc: netdev , Eric Dumazet , Coco Li , David Ahern , Alexander Duyck , Eric Dumazet Subject: [PATCH v2 net-next 09/14] net: loopback: enable BIG TCP packets Date: Thu, 3 Mar 2022 10:16:02 -0800 Message-Id: <20220303181607.1094358-10-eric.dumazet@gmail.com> X-Mailer: git-send-email 2.35.1.616.g0bdcbb4464-goog In-Reply-To: <20220303181607.1094358-1-eric.dumazet@gmail.com> References: <20220303181607.1094358-1-eric.dumazet@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org From: Eric Dumazet Set the driver limit to 512 KB per TSO ipv6 packet. This allows the admin/user to set a GSO ipv6 limit up to this value. Tested: ip link set dev lo gso_ipv6_max_size 200000 netperf -H ::1 -t TCP_RR -l 100 -- -r 80000,80000 & tcpdump shows : 18:28:42.962116 IP6 ::1 > ::1: HBH 40051 > 63780: Flags [P.], seq 3626480001:3626560001, ack 3626560001, win 17743, options [nop,nop,TS val 3771179265 ecr 3771179265], length 80000 18:28:42.962138 IP6 ::1.63780 > ::1.40051: Flags [.], ack 3626560001, win 17743, options [nop,nop,TS val 3771179265 ecr 3771179265], length 0 18:28:42.962152 IP6 ::1 > ::1: HBH 63780 > 40051: Flags [P.], seq 3626560001:3626640001, ack 3626560001, win 17743, options [nop,nop,TS val 3771179265 ecr 3771179265], length 80000 18:28:42.962157 IP6 ::1.40051 > ::1.63780: Flags [.], ack 3626640001, win 17743, options [nop,nop,TS val 3771179265 ecr 3771179265], length 0 18:28:42.962180 IP6 ::1 > ::1: HBH 40051 > 63780: Flags [P.], seq 3626560001:3626640001, ack 3626640001, win 17743, options [nop,nop,TS val 3771179265 ecr 3771179265], length 80000 18:28:42.962214 IP6 ::1.63780 > ::1.40051: Flags [.], ack 3626640001, win 17743, options [nop,nop,TS val 3771179266 ecr 3771179265], length 0 18:28:42.962228 IP6 ::1 > ::1: HBH 63780 > 40051: Flags [P.], seq 3626640001:3626720001, ack 3626640001, win 17743, options [nop,nop,TS val 3771179266 ecr 3771179265], length 80000 18:28:42.962233 IP6 ::1.40051 > ::1.63780: Flags [.], ack 3626720001, win 17743, options [nop,nop,TS val 3771179266 ecr 3771179266], length 0 Signed-off-by: Eric Dumazet --- drivers/net/loopback.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c index 720394c0639b20a2fd6262e4ee9d5813c02802f1..9c21d18f0aa75a310ac600081b450f6312ff16fc 100644 --- a/drivers/net/loopback.c +++ b/drivers/net/loopback.c @@ -191,6 +191,8 @@ static void gen_lo_setup(struct net_device *dev, dev->netdev_ops = dev_ops; dev->needs_free_netdev = true; dev->priv_destructor = dev_destructor; + + netif_set_tso_ipv6_max_size(dev, 512 * 1024); } /* The loopback device is special. There is only one instance