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 0B6F2C43334 for ; Tue, 26 Jul 2022 10:25:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233109AbiGZKZo (ORCPT ); Tue, 26 Jul 2022 06:25:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55588 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238483AbiGZKZm (ORCPT ); Tue, 26 Jul 2022 06:25:42 -0400 Received: from mail-pj1-x1035.google.com (mail-pj1-x1035.google.com [IPv6:2607:f8b0:4864:20::1035]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1CBADB7D6 for ; Tue, 26 Jul 2022 03:25:41 -0700 (PDT) Received: by mail-pj1-x1035.google.com with SMTP id f11-20020a17090a4a8b00b001f2f7e32d03so708465pjh.0 for ; Tue, 26 Jul 2022 03:25:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=r5Txqu8QqXk1j94Vu9ZhuEySdqC2ZrZ0pryhl2/h6u4=; b=OratSyFjs8lguRMoLLR/6XbSIus3l89GNJQCnkMhiNE+yEq26tSWrhPDxGDuy1RrjV CY49k6KBT3flryi3LiyMQLt8rPS39DkKFNr9aqLftTTAArPXtwJrHqbbVI+DnpGzPAgx +yF3Bak1XL0x/itHSBsGme/5kx5Y7ARJYCHLUvSBhBIaC4GMquMNuy1alLHDkjQwk4ax DFTZbjqhlt3u1tqMMmruNIXx3SDIW5Be4w4yDZk9QwkvyTokBShm2bC+SyG4jfxLi/BE uuwFRS3IIqKDWonYEq1+ovUADDomBPDFJWUPkjXL6KbBur2hf0RlnvEC2ok/hyrJrbOw QSww== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-transfer-encoding; bh=r5Txqu8QqXk1j94Vu9ZhuEySdqC2ZrZ0pryhl2/h6u4=; b=2m21QRbm2PeK4mR2U4VqDLlRyL3gme58XQP1xwj5OYkkIe3WuNMU5hjdJu5LKC70oJ qp0UT/zh3dnr0IerIOI+zMct3cxtIpKpcSN5URx4lsScmkAwm+dmZR1DgIzNdN2ju3VF CFLGwqDDuS1dJMzE/PhSXdukAvsTL82fygeGsLxFB0Sc7qxrki2wqG2sc6H+mxPFySBh P6p3ohLkoS+IkNjgNxFlEWYCFS8Wjqhyt3moOB46a7vzjvuIjRY85q+tjCsg0LRgGiRr oZjV8Sd7gVbq/mBFfG9LTl7EEAbEXagJJzp039xWi9EVHYJIAURpD+f3kHlo9qNXZR4/ bTBA== X-Gm-Message-State: AJIora9sXewf+H/InX6H8K2FclYYrsf1ROg7zRD1tWGPOKUAA+wY96l+ 4fgOnfupkYrFM/3PrJ2uUGusfnyn9hfoyw== X-Google-Smtp-Source: AGRyM1skROypJl4H5W6U7pAZrXQFzlFg9UbNSMIr/UHar5I5xshaS0HV8DVRlnKsBSDVVwlOsWb9hA== X-Received: by 2002:a17:903:2311:b0:16d:9b91:9547 with SMTP id d17-20020a170903231100b0016d9b919547mr3002596plh.18.1658831140444; Tue, 26 Jul 2022 03:25:40 -0700 (PDT) Received: from localhost.localdomain (124x33x176x97.ap124.ftth.ucom.ne.jp. [124.33.176.97]) by smtp.gmail.com with ESMTPSA id y6-20020a655b46000000b00411bbcdfbf7sm9869894pgr.87.2022.07.26.03.25.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 26 Jul 2022 03:25:40 -0700 (PDT) Sender: Vincent Mailhol From: Vincent Mailhol To: linux-can@vger.kernel.org, Marc Kleine-Budde Cc: Stephane Grosjean , Jimmy Assarsson , Oliver Hartkopp , Dario Binacchi , Max Staudt , Vincent Mailhol Subject: [PATCH v3 08/14] can: dev: add generic function can_eth_ioctl_hwts() Date: Tue, 26 Jul 2022 19:24:48 +0900 Message-Id: <20220726102454.95096-9-mailhol.vincent@wanadoo.fr> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220726102454.95096-1-mailhol.vincent@wanadoo.fr> References: <20220725133208.432176-1-mailhol.vincent@wanadoo.fr> <20220726102454.95096-1-mailhol.vincent@wanadoo.fr> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-can@vger.kernel.org Tools based on libpcap (such as tcpdump) expect the SIOCSHWTSTAMP ioctl call to be supported. This is also specified in the kernel doc [1]. The purpose of this ioctl is to toggle the hardware timestamps. Currently, CAN devices which support hardware timestamping have those always activated. can_eth_ioctl_hwts() is a dumb function that will always succeed when requested to set tx_type to HWTSTAMP_TX_ON or rx_filter to HWTSTAMP_FILTER_ALL. [1] Kernel doc: Timestamping, section 3.1 "Hardware Timestamping Implementation: Device Drivers" Link: https://docs.kernel.org/networking/timestamping.html#hardware-timestamping-implementation-device-drivers Signed-off-by: Vincent Mailhol --- drivers/net/can/dev/dev.c | 29 +++++++++++++++++++++++++++++ include/linux/can/dev.h | 1 + 2 files changed, 30 insertions(+) diff --git a/drivers/net/can/dev/dev.c b/drivers/net/can/dev/dev.c index f307034ff4fd..c1956b1e9faf 100644 --- a/drivers/net/can/dev/dev.c +++ b/drivers/net/can/dev/dev.c @@ -322,6 +322,35 @@ int can_change_mtu(struct net_device *dev, int new_mtu) } EXPORT_SYMBOL_GPL(can_change_mtu); +/* generic implementation of netdev_ops::ndo_eth_ioctl for CAN devices + * supporting hardware timestamps + */ +int can_eth_ioctl_hwts(struct net_device *netdev, struct ifreq *ifr, int cmd) +{ + struct hwtstamp_config hwts_cfg = { 0 }; + + switch (cmd) { + case SIOCSHWTSTAMP: /* set */ + if (copy_from_user(&hwts_cfg, ifr->ifr_data, sizeof(hwts_cfg))) + return -EFAULT; + if (hwts_cfg.tx_type == HWTSTAMP_TX_ON && + hwts_cfg.rx_filter == HWTSTAMP_FILTER_ALL) + return 0; + return -ERANGE; + + case SIOCGHWTSTAMP: /* get */ + hwts_cfg.tx_type = HWTSTAMP_TX_ON; + hwts_cfg.rx_filter = HWTSTAMP_FILTER_ALL; + if (copy_to_user(ifr->ifr_data, &hwts_cfg, sizeof(hwts_cfg))) + return -EFAULT; + return 0; + + default: + return -EOPNOTSUPP; + } +} +EXPORT_SYMBOL(can_eth_ioctl_hwts); + /* generic implementation of ethtool_ops::get_ts_info for CAN devices * supporting hardware timestamps */ diff --git a/include/linux/can/dev.h b/include/linux/can/dev.h index 752bd45d8ebf..c3e50e537e39 100644 --- a/include/linux/can/dev.h +++ b/include/linux/can/dev.h @@ -163,6 +163,7 @@ struct can_priv *safe_candev_priv(struct net_device *dev); int open_candev(struct net_device *dev); void close_candev(struct net_device *dev); int can_change_mtu(struct net_device *dev, int new_mtu); +int can_eth_ioctl_hwts(struct net_device *netdev, struct ifreq *ifr, int cmd); int can_ethtool_op_get_ts_info_hwts(struct net_device *dev, struct ethtool_ts_info *info); -- 2.35.1