From patchwork Mon Feb 6 13:43:42 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Srinivas Kandagatla X-Patchwork-Id: 53237 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:adf:eb09:0:0:0:0:0 with SMTP id s9csp2242065wrn; Mon, 6 Feb 2023 05:45:36 -0800 (PST) X-Google-Smtp-Source: AK7set8leaV1CXG6yJdJMc/oHBuHhsATHl0IRfhrcmbFyalEtuvEsR94C20qYYdHkTUY9vMXfAwG X-Received: by 2002:a17:906:1806:b0:88b:109e:fbd3 with SMTP id v6-20020a170906180600b0088b109efbd3mr19493022eje.24.1675691135917; Mon, 06 Feb 2023 05:45:35 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1675691135; cv=none; d=google.com; s=arc-20160816; b=rseoE6dC80xBbJM6ulYfRGbONCPaqai2oOz89do620yf7lIaTxRgGsqGown1/pIRnX 0K0ra4ZCJ4Bc/oY6YoaItjod5jp5PDCmPTasHeuOsOv53MkeV8rlm6aS6ltw06jqiRNc h4UCfvmVwzy1KklSi9kUiBjc+e9EwtQgPSh30VoSEONhipdmlTNsA30ED1eozNj56BLh qkyecRAfnXQxZufRWlEcvlXBPvV8WcFIIfFEosN5jlIqzGAfFQYIt0X+4OWAMemVqjW5 ZD6u7khrEAX8IjwqBzy5Mi9643gYizNq1YsNi08nZlZHZF67J9wPDzRo9R80+0LXKyDm bWUg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from :dkim-signature; bh=Y+cl5Ym56wJ7OQnEfR1Yodsc3crTZ07l528z+P6rSd8=; b=yiou/+AGqb+uwsXiqTTP0JKXMtHsVeRVsXSKcPw1XeJGBECa9UpKI5O9osZUdw3ArV qgHemZJREftJ6caZtmGBRh3Jd2Raf3HeHIOpBu9dCOzgv7eG+EpGMDhpAq9M/TJpYRAJ ga4PklizxduaK/FkYTp1hi0pt3fB300hPy6xIApTQwGKAsi2z67MHBwuWwT8LAbsWXvx PKCymENvgAakGjOa+dtOEkOOYGyREQI+v9mEbMkNBeOgOiv1kVQrvEPCUh21DfxdoaHP xYTwUBoh2bHkM33COcmk4Vv2j7rM6bjZx2em3b9fvZOnweKiUc0NE6hG8Je5HhzxIa+g e/MQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=hNyOPh9k; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id 26-20020a170906029a00b0088bc8586371si14803252ejf.753.2023.02.06.05.45.13; Mon, 06 Feb 2023 05:45:35 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=hNyOPh9k; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230077AbjBFNol (ORCPT + 99 others); Mon, 6 Feb 2023 08:44:41 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48568 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230157AbjBFNo2 (ORCPT ); Mon, 6 Feb 2023 08:44:28 -0500 Received: from mail-wr1-x433.google.com (mail-wr1-x433.google.com [IPv6:2a00:1450:4864:20::433]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1B6561F4A1 for ; Mon, 6 Feb 2023 05:44:14 -0800 (PST) Received: by mail-wr1-x433.google.com with SMTP id bk16so10382906wrb.11 for ; Mon, 06 Feb 2023 05:44:14 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=Y+cl5Ym56wJ7OQnEfR1Yodsc3crTZ07l528z+P6rSd8=; b=hNyOPh9k+ioWrpArqXwn8leHfx0tRugeEFdqswjt4vumT7yAguVtyBt9GOnbQZzWA/ W7f6EWWXHrga24+/tVNEwNznt+n9DuY3MwysnUDe4ut0jK8LvnpGN6ehUP82t5tLXaIC ZzqclXU71IRzD23CEo45WhpKwfK2GPLbChIkiH9RRkGztxZ9ASTue+WCKOnQ8Ab7d6a7 0uatxjl49iHi6I6Emo6zPrri9QW9KUWpyKUvGB/vwLP5gKZraTpbggBi3cp0xGxOo5Rl syRo4bdV012Ahjf6fGIOOViFPnKUKnY1JLeqN+IZt4FUqAbN1BVckkHb+2ZmPYdiCWlx 1UkQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=Y+cl5Ym56wJ7OQnEfR1Yodsc3crTZ07l528z+P6rSd8=; b=k0/cVDxd7h7yV+IivFdyWdZAjHfxGP/eDtjCaEBCs6iP7RYk2+fbo72zLhz/nHn9W0 tLJ6YULGl01RtsnpJn72Lj8X6r3zDHRUmi2/jGrZOVrTCvTkp6/Ek/2Kk7NNPbhtR6ww NCrkVoKIePaAlzmqdDeE3wo0PadnxCq6G84BsrfYw55/G4Ha8KaB8z6/FnBY5lvTEmUc vmRs7d9fEBFg6raVTlcLVRAEV85YAI5aHhZBvPaIR2Lo5P6JRR55iw8X9rV7eQ1Sc1RS yHWq9wAP/oOzH/tta7Ghd5cFNG9gt9d4xI5EHRhh97UENX9hvfGna/pA95IqRzjRKS1b 6Hxg== X-Gm-Message-State: AO0yUKUmmTBgkk7fyELrDNJJDAh/U9Ibq7yVL/YfavyKMnXhl0FKKOwD XrQhkEW3zzcxKoRe+UzZtV1h9w== X-Received: by 2002:adf:9c8e:0:b0:2c1:28dc:1561 with SMTP id d14-20020adf9c8e000000b002c128dc1561mr16263048wre.44.1675691054594; Mon, 06 Feb 2023 05:44:14 -0800 (PST) Received: from localhost.localdomain ([5.133.47.210]) by smtp.gmail.com with ESMTPSA id o15-20020adfa10f000000b002bddaea7a0bsm9008037wro.57.2023.02.06.05.44.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 Feb 2023 05:44:13 -0800 (PST) From: Srinivas Kandagatla To: gregkh@linuxfoundation.org Cc: linux-kernel@vger.kernel.org, Michael Walle , Andrew Lunn , Jakub Kicinski , Srinivas Kandagatla Subject: [PATCH v2 08/22] net: add helper eth_addr_add() Date: Mon, 6 Feb 2023 13:43:42 +0000 Message-Id: <20230206134356.839737-9-srinivas.kandagatla@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230206134356.839737-1-srinivas.kandagatla@linaro.org> References: <20230206134356.839737-1-srinivas.kandagatla@linaro.org> MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1757089508221507565?= X-GMAIL-MSGID: =?utf-8?q?1757089508221507565?= From: Michael Walle Add a helper to add an offset to a ethernet address. This comes in handy if you have a base ethernet address for multiple interfaces. Signed-off-by: Michael Walle Reviewed-by: Andrew Lunn Acked-by: Jakub Kicinski Signed-off-by: Srinivas Kandagatla --- include/linux/etherdevice.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/include/linux/etherdevice.h b/include/linux/etherdevice.h index a541f0c4f146..224645f17c33 100644 --- a/include/linux/etherdevice.h +++ b/include/linux/etherdevice.h @@ -507,6 +507,20 @@ static inline void eth_addr_inc(u8 *addr) u64_to_ether_addr(u, addr); } +/** + * eth_addr_add() - Add (or subtract) an offset to/from the given MAC address. + * + * @offset: Offset to add. + * @addr: Pointer to a six-byte array containing Ethernet address to increment. + */ +static inline void eth_addr_add(u8 *addr, long offset) +{ + u64 u = ether_addr_to_u64(addr); + + u += offset; + u64_to_ether_addr(u, addr); +} + /** * is_etherdev_addr - Tell if given Ethernet address belongs to the device. * @dev: Pointer to a device structure