From patchwork Thu Mar 10 05:46:50 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Dumazet X-Patchwork-Id: 12775931 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 7A726C433F5 for ; Thu, 10 Mar 2022 05:47:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239635AbiCJFsQ (ORCPT ); Thu, 10 Mar 2022 00:48:16 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50882 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234788AbiCJFsK (ORCPT ); Thu, 10 Mar 2022 00:48:10 -0500 Received: from mail-pl1-x62c.google.com (mail-pl1-x62c.google.com [IPv6:2607:f8b0:4864:20::62c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6F69AF957C for ; Wed, 9 Mar 2022 21:47:10 -0800 (PST) Received: by mail-pl1-x62c.google.com with SMTP id r12so3934510pla.1 for ; Wed, 09 Mar 2022 21:47:10 -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=YrYyHNdzE/bZgTw4/T1DAouhykqpGbQHdq//8INO1ZY=; b=G2OWFJBcSGzie4ZKrS5oi3Bm7hXuQH+HQbukbMQtaw0recZKHC0BrSKUlc+aGlpZjt 6pPCxSDSsOjau3NO3pHx59Bm+yR+gERGn7c6Vr6JAnQ5hjuEnhRz6K/HPM9QZ7B0e0cz lU7Soz3ZDOywdoGC10RAr+XXLVN1eti/PUQKFTtLQ925fBbEa3SUtkU10nf0TqNgarOc EZROsFvCnsnTa05dSnLxBsdV93pr7ksJHIqRunbNRPv0LYHLSCgaS4exEUrHJ4zCvbxS xAibBoDQOWblVs7rbjGRskx1CvEWMhApm/pjiCwIwEBxXvrqjRlbnvqwAziDKUasswBC 3uqQ== 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=YrYyHNdzE/bZgTw4/T1DAouhykqpGbQHdq//8INO1ZY=; b=CDw+3lDkCSwVL9kywcoHeceNeDO3rVC2ZuP2h09ZoiNLLY4UEUMKUnH5pidLjhCLh3 J4J4fs68s3sYrurNxABMp2dkfRUc6212uxElMhIZkK7DnVIG4qx0ej3EVDzymLhDB1WO Jard4DLdS059GsEP10hSrVMjax3H7yRflRO9RFdR+ywrn//9M0hkACp6TBLabh0EJaeK 0Zskas+d9NBPTOsQaKi1cQgK+6vGf6nh65Qm1fKvadstmKnQuMJXfJjU6jNUUvzVfbdp GOl9ONNJs9F+21AWlshM20VT2OGlKVfIVZcM6fBgXOhSpeGY84o2rcoicB574LIEdGIl 2J0w== X-Gm-Message-State: AOAM533hvPwFbLGNBfO2WmxSFylFPxpNH6t3rn7OPRI8qWedLdu7zsn+ 62smehpm+p5APjkMCpwbr0A= X-Google-Smtp-Source: ABdhPJxQsm4zfbnwfjPiaD3DFOUiSyXy1gAOcsrGwqOujXWmIMs8cN1vtinOB78dCz39Rodnb1O2OQ== X-Received: by 2002:a17:90a:fa95:b0:1bc:509f:c668 with SMTP id cu21-20020a17090afa9500b001bc509fc668mr14219281pjb.189.1646891229940; Wed, 09 Mar 2022 21:47:09 -0800 (PST) Received: from edumazet1.svl.corp.google.com ([2620:15c:2c4:201:c6c7:6f77:9634:183c]) by smtp.gmail.com with ESMTPSA id 16-20020a056a00073000b004dfe2217090sm5270779pfm.200.2022.03.09.21.47.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 09 Mar 2022 21:47:09 -0800 (PST) From: Eric Dumazet To: "David S . Miller" , Jakub Kicinski Cc: netdev , Alexander Duyck , Coco Li , Eric Dumazet , Eric Dumazet Subject: [PATCH v4 net-next 01/14] net: add netdev->tso_ipv6_max_size attribute Date: Wed, 9 Mar 2022 21:46:50 -0800 Message-Id: <20220310054703.849899-2-eric.dumazet@gmail.com> X-Mailer: git-send-email 2.35.1.616.g0bdcbb4464-goog In-Reply-To: <20220310054703.849899-1-eric.dumazet@gmail.com> References: <20220310054703.849899-1-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 Some NIC (or virtual devices) are LSOv2 compatible. BIG TCP plans using the large LSOv2 feature for IPv6. New netlink attribute IFLA_TSO_IPV6_MAX_SIZE is defined. Drivers should use netif_set_tso_ipv6_max_size() to advertize their limit. Unchanged drivers are not allowing big TSO packets to be sent. Signed-off-by: Eric Dumazet --- include/linux/netdevice.h | 10 ++++++++++ include/uapi/linux/if_link.h | 1 + net/core/dev.c | 2 ++ net/core/rtnetlink.c | 3 +++ tools/include/uapi/linux/if_link.h | 1 + 5 files changed, 17 insertions(+) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 29a850a8d4604bb2ac43b582595f301aaa96a0bc..61db67222c47664c179b6a5d3b6f15fdf8a02bdd 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -1951,6 +1951,7 @@ enum netdev_ml_priv_type { * @dev_registered_tracker: tracker for reference held while * registered * @offload_xstats_l3: L3 HW stats for this netdevice. + * @tso_ipv6_max_size: Maximum size of IPv6 TSO packets (driver/NIC limit) * * FIXME: cleanup struct net_device such that network protocol info * moves out. @@ -2289,6 +2290,7 @@ struct net_device { netdevice_tracker watchdog_dev_tracker; netdevice_tracker dev_registered_tracker; struct rtnl_hw_stats64 *offload_xstats_l3; + unsigned int tso_ipv6_max_size; }; #define to_net_dev(d) container_of(d, struct net_device, dev) @@ -4888,6 +4890,14 @@ static inline void netif_set_gro_max_size(struct net_device *dev, WRITE_ONCE(dev->gro_max_size, size); } +/* Used by drivers to give their hardware/firmware limit for LSOv2 packets */ +static inline void netif_set_tso_ipv6_max_size(struct net_device *dev, + unsigned int size) +{ + dev->tso_ipv6_max_size = size; +} + + static inline void skb_gso_error_unwind(struct sk_buff *skb, __be16 protocol, int pulled_hlen, u16 mac_offset, int mac_len) diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h index ddca20357e7e89b5f204b3117ff3838735535470..c8af031b692e52690a2760e9d79c9462185e2fc9 100644 --- a/include/uapi/linux/if_link.h +++ b/include/uapi/linux/if_link.h @@ -363,6 +363,7 @@ enum { IFLA_PARENT_DEV_NAME, IFLA_PARENT_DEV_BUS_NAME, IFLA_GRO_MAX_SIZE, + IFLA_TSO_IPV6_MAX_SIZE, __IFLA_MAX }; diff --git a/net/core/dev.c b/net/core/dev.c index ba69ddf85af6b4543caa91f314caf54794a3a02a..de28f634c18a65d1948a96db5678d38e9c871b1f 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -10467,6 +10467,8 @@ struct net_device *alloc_netdev_mqs(int sizeof_priv, const char *name, dev->gso_max_size = GSO_MAX_SIZE; dev->gso_max_segs = GSO_MAX_SEGS; dev->gro_max_size = GRO_MAX_SIZE; + dev->tso_ipv6_max_size = GSO_MAX_SIZE; + dev->upper_level = 1; dev->lower_level = 1; #ifdef CONFIG_LOCKDEP diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c index a759f9e0a8476538fb41311113daed998a7193fd..ab51b18cdb5d46b87d4a11d2f66a68968ba737d6 100644 --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -1027,6 +1027,7 @@ static noinline size_t if_nlmsg_size(const struct net_device *dev, + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */ + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */ + nla_total_size(4) /* IFLA_GRO_MAX_SIZE */ + + nla_total_size(4) /* IFLA_TSO_IPV6_MAX_SIZE */ + nla_total_size(1) /* IFLA_OPERSTATE */ + nla_total_size(1) /* IFLA_LINKMODE */ + nla_total_size(4) /* IFLA_CARRIER_CHANGES */ @@ -1732,6 +1733,7 @@ static int rtnl_fill_ifinfo(struct sk_buff *skb, nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) || nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) || nla_put_u32(skb, IFLA_GRO_MAX_SIZE, dev->gro_max_size) || + nla_put_u32(skb, IFLA_TSO_IPV6_MAX_SIZE, dev->tso_ipv6_max_size) || #ifdef CONFIG_RPS nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) || #endif @@ -1885,6 +1887,7 @@ static const struct nla_policy ifla_policy[IFLA_MAX+1] = { [IFLA_NEW_IFINDEX] = NLA_POLICY_MIN(NLA_S32, 1), [IFLA_PARENT_DEV_NAME] = { .type = NLA_NUL_STRING }, [IFLA_GRO_MAX_SIZE] = { .type = NLA_U32 }, + [IFLA_TSO_IPV6_MAX_SIZE] = { .type = NLA_U32 }, }; static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { diff --git a/tools/include/uapi/linux/if_link.h b/tools/include/uapi/linux/if_link.h index e1ba2d51b717b7ac7f06e94ac9791cf4c8a5ab6f..441615c39f0a24eeeb6e27b4ca88031bcc234cf8 100644 --- a/tools/include/uapi/linux/if_link.h +++ b/tools/include/uapi/linux/if_link.h @@ -348,6 +348,7 @@ enum { IFLA_PARENT_DEV_NAME, IFLA_PARENT_DEV_BUS_NAME, IFLA_GRO_MAX_SIZE, + IFLA_TSO_IPV6_MAX_SIZE, __IFLA_MAX };