From patchwork Thu Mar 10 00:28:41 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Dumazet X-Patchwork-Id: 12775728 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 444E1C433EF for ; Thu, 10 Mar 2022 00:29:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239031AbiCJAaV (ORCPT ); Wed, 9 Mar 2022 19:30:21 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53158 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239010AbiCJAaJ (ORCPT ); Wed, 9 Mar 2022 19:30:09 -0500 Received: from mail-pg1-x533.google.com (mail-pg1-x533.google.com [IPv6:2607:f8b0:4864:20::533]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AD71412551E for ; Wed, 9 Mar 2022 16:29:08 -0800 (PST) Received: by mail-pg1-x533.google.com with SMTP id q19so3334648pgm.6 for ; Wed, 09 Mar 2022 16:29:08 -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=PiHaWL2Z7Ii/ZlXjTFY2fEmQ7kaOLaOshSuRYMEwmekU8x3VPynq+lIlJOQX7XIyc/ XKuYYZdEa3QSNVT+PMHBsPU8M+eenYuFoMvY9cFxxN0yZvAeAOTCs/EaiwubslXcHe7u nrJdWjtQABr1xD0VEenNC4JXZjGh1dz3XsnU01H3QsOg40RDONSIYKAKTvphv+y1veQp B4hQ+lpmOjdJO3C66K0J6CMhmY32St4OPa/wWfGBDAFj0VY6DYOUM4c2ixEulidQtYYK n/crF7s65lhS6MCwzfnn7GqhBSNCFyIFnhxWL9zFMFAOuNtGqubkgR/7L6pFHaOI8p7s jlFg== 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=fO0tk+42KdEkOX+rkcW0hDbhoUcYhlr1l9zowIl0cJ5C7teacuFmmErqJKG0984+2x fUCVvOL5/FTUU5SjopMbaaSIebD8v9vfgTA4qY/pfvNAcpPgKmkv+oSFVR2HzN9fPVRa dy0UqcsJlAqDcAUpZspqt0d/fn6GFmVkewiIvJO5pp/JnsPbok+lOOFJ6xuJqdGGk6vB OsMqtV2YSyr6jWOrWe1GaNjx0uPWJb1SWXDOcXGtMBFwyan42vljzs3UHK61/GoToAqX pwnOi7NlwzggPzrn2imvHmGEUtQWa+2upSm2AGT8odzYgeKgJA529qHcRR8pmwsRCBKi 6noA== X-Gm-Message-State: AOAM531V+qcqdm4mxpI95Zcloc+F4z4QI/MFMUjEot7rWKRuILUSz1G7 9kBLz/xhTQ0lapvlYiCOfaI= X-Google-Smtp-Source: ABdhPJzJ7HqekbKSCYUd+Uz2J9U7oYkNHGCtxJC4NiYHZSkpk2vbnkw0n4wGv0cuEfgLhotc1sO8Xg== X-Received: by 2002:a63:6a41:0:b0:37c:7a6e:e7a3 with SMTP id f62-20020a636a41000000b0037c7a6ee7a3mr1827286pgc.528.1646872148202; Wed, 09 Mar 2022 16:29:08 -0800 (PST) Received: from edumazet1.svl.corp.google.com ([2620:15c:2c4:201:c6c7:6f77:9634:183c]) by smtp.gmail.com with ESMTPSA id nv4-20020a17090b1b4400b001bf64a39579sm7557660pjb.4.2022.03.09.16.29.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 09 Mar 2022 16:29:07 -0800 (PST) From: Eric Dumazet To: "David S . Miller" , Jakub Kicinski Cc: netdev , Alexander Duyck , Coco Li , Eric Dumazet , Eric Dumazet Subject: [PATCH v3 net-next 09/14] net: loopback: enable BIG TCP packets Date: Wed, 9 Mar 2022 16:28:41 -0800 Message-Id: <20220310002846.460907-10-eric.dumazet@gmail.com> X-Mailer: git-send-email 2.35.1.616.g0bdcbb4464-goog In-Reply-To: <20220310002846.460907-1-eric.dumazet@gmail.com> References: <20220310002846.460907-1-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