From patchwork Sun Jan 17 14:59:42 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tariq Toukan X-Patchwork-Id: 12025439 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 X-Spam-Level: X-Spam-Status: No, score=-13.9 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY, UNWANTED_LANGUAGE_BODY,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 31B86C43381 for ; Sun, 17 Jan 2021 15:01:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0939421D81 for ; Sun, 17 Jan 2021 15:01:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729351AbhAQPBb (ORCPT ); Sun, 17 Jan 2021 10:01:31 -0500 Received: from mail-il-dmz.mellanox.com ([193.47.165.129]:45146 "EHLO mellanox.co.il" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1729124AbhAQPBG (ORCPT ); Sun, 17 Jan 2021 10:01:06 -0500 Received: from Internal Mail-Server by MTLPINE1 (envelope-from tariqt@nvidia.com) with SMTP; 17 Jan 2021 17:00:15 +0200 Received: from dev-l-vrt-206-005.mtl.labs.mlnx (dev-l-vrt-206-005.mtl.labs.mlnx [10.234.206.5]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id 10HF0F7C029614; Sun, 17 Jan 2021 17:00:15 +0200 From: Tariq Toukan To: "David S. Miller" , Jakub Kicinski Cc: Boris Pismenny , netdev@vger.kernel.org, Tariq Toukan , Moshe Shemesh , Jay Vosburgh , Veaceslav Falico , Andy Gospodarek , John Fastabend , Daniel Borkmann , Jarod Wilson , Ivan Vecera , Tariq Toukan Subject: [PATCH net-next V3 1/8] net: netdevice: Add operation ndo_sk_get_lower_dev Date: Sun, 17 Jan 2021 16:59:42 +0200 Message-Id: <20210117145949.8632-2-tariqt@nvidia.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20210117145949.8632-1-tariqt@nvidia.com> References: <20210117145949.8632-1-tariqt@nvidia.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org ndo_sk_get_lower_dev returns the lower netdev that corresponds to a given socket. Additionally, we implement a helper netdev_sk_get_lowest_dev() to get the lowest one in chain. Signed-off-by: Tariq Toukan Reviewed-by: Boris Pismenny --- include/linux/netdevice.h | 4 ++++ net/core/dev.c | 33 +++++++++++++++++++++++++++++++++ 2 files changed, 37 insertions(+) diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 5b949076ed23..02dcef4d66e2 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -1398,6 +1398,8 @@ struct net_device_ops { struct net_device* (*ndo_get_xmit_slave)(struct net_device *dev, struct sk_buff *skb, bool all_slaves); + struct net_device* (*ndo_sk_get_lower_dev)(struct net_device *dev, + struct sock *sk); netdev_features_t (*ndo_fix_features)(struct net_device *dev, netdev_features_t features); int (*ndo_set_features)(struct net_device *dev, @@ -2858,6 +2860,8 @@ int init_dummy_netdev(struct net_device *dev); struct net_device *netdev_get_xmit_slave(struct net_device *dev, struct sk_buff *skb, bool all_slaves); +struct net_device *netdev_sk_get_lowest_dev(struct net_device *dev, + struct sock *sk); struct net_device *dev_get_by_index(struct net *net, int ifindex); struct net_device *__dev_get_by_index(struct net *net, int ifindex); struct net_device *dev_get_by_index_rcu(struct net *net, int ifindex); diff --git a/net/core/dev.c b/net/core/dev.c index bae35c1ae192..6b90520a01b1 100644 --- a/net/core/dev.c +++ b/net/core/dev.c @@ -8105,6 +8105,39 @@ struct net_device *netdev_get_xmit_slave(struct net_device *dev, } EXPORT_SYMBOL(netdev_get_xmit_slave); +static struct net_device *netdev_sk_get_lower_dev(struct net_device *dev, + struct sock *sk) +{ + const struct net_device_ops *ops = dev->netdev_ops; + + if (!ops->ndo_sk_get_lower_dev) + return NULL; + return ops->ndo_sk_get_lower_dev(dev, sk); +} + +/** + * netdev_sk_get_lowest_dev - Get the lowest device in chain given device and socket + * @dev: device + * @sk: the socket + * + * %NULL is returned if no lower device is found. + */ + +struct net_device *netdev_sk_get_lowest_dev(struct net_device *dev, + struct sock *sk) +{ + struct net_device *lower; + + lower = netdev_sk_get_lower_dev(dev, sk); + while (lower) { + dev = lower; + lower = netdev_sk_get_lower_dev(dev, sk); + } + + return dev; +} +EXPORT_SYMBOL(netdev_sk_get_lowest_dev); + static void netdev_adjacent_add_links(struct net_device *dev) { struct netdev_adjacent *iter;