From nobody Wed Sep 10 08:06:44 2025 Received: from mail-ej1-f54.google.com (mail-ej1-f54.google.com [209.85.218.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6F00E35CEB2; Tue, 9 Sep 2025 20:24:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.54 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757449463; cv=none; b=PtGiQE8bBg35EoqVAXn+33l5mGFxT44KELfGPGMjxz0V/sRak+rK29Wgxsmr78PLnbehwxporlV/VXkVrlrY1UWyTl2sPypJRM3fkVpvUP2Uswa6Z+MX0UJmCxD1NIiw0Y6yMl4yPLdCOPe/WttfMUL53uXpgZEvS02E77ttC68= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757449463; c=relaxed/simple; bh=4qXNf5FPKeqB6oI1PmmIoli/4B/k2fYlPhoDMAj4Ltg=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=XUdf9kenMKnkhLAf3TNopDNd6nzOavHYZ0k8FpUrRO/0xYZM9qQeGmqmODNTadLdcdFxlqt1ZymEwjrqwhE/JYh+YVbDu3us02VHBCwyFL5geSZK2GEZy3mhfgwQAp0oVLPxxudCD3TcKVtvqgpCzXMUAZ957YZaX5uA7Oi1/wM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=debian.org; spf=pass smtp.mailfrom=gmail.com; arc=none smtp.client-ip=209.85.218.54 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=debian.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Received: by mail-ej1-f54.google.com with SMTP id a640c23a62f3a-b047f28a83dso1033788766b.2; Tue, 09 Sep 2025 13:24:21 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1757449460; x=1758054260; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=AEyyDJEjHIGcptoyVMY30XDmajElEFVLCjxYGTHfuEc=; b=bn/8sCxjxKLHqNjk6XQVtnqzp2LToIXvJKMN7NTesuhtdeL43AKBWmANhIdjba9HMz k01M71ztOLYMIgFoYLWaqvJDfwckS+8i6hiw5OCcHwtFyB6amkHL5V5eXbp1GLWc0wV7 TEh69eWKH0fqu3hJrQsVOa67lGtKY13YDtOtIyTndZzoFO8qyEDl/5eJ0pDHYIDF3vi2 gNSPu9OOF3m55BRaCcapvUNI1fyZx9EGW+eOW0CG3NWv8p9Zti79lfGp6ftHSgGBHESM aO9vlaPjBe66gIm0ZJvCYO8nGlZJ28EXLeQKRy2uiby6JgYoITRMpWnXDkcRjlrCCWtX ho4Q== X-Forwarded-Encrypted: i=1; AJvYcCXpw2tYJEU76ISQ+RMWuSdAq11EOFlzezJtNOhUmlxKB+7DjKaWxJD326TSe9gdurkY4aCHYGfF2Mo1yjI=@vger.kernel.org X-Gm-Message-State: AOJu0YxrytFyruk0u+yZ9kYXyepSBu01WzhOD12WNSBRUJdMlVPWJInY YtSdLopvtR3BsPF/xCRZ9ude235ogF/8lAUqd6SA/o/+UEa2ewNzdUE3 X-Gm-Gg: ASbGncupAKA1We75HyfyguxAN3XEMh4LOZ6/n365MTBRLFapf0ra8JBT2fjcGypVm69 X0K4XU4eA++ZbGrDxdsCkX7hK2Xp9qO+eLVEbQ82Fitjob52EyPnEYoIoY44ai8cDIZ+CkXW3CK atl7OfJrBBrdLf/BiJzvFeIWDFD5el5l2dfknVX+hqtea4/7uEjMqL7YV+JRMJw4Z3n7yeTmj1c VPM+bwfG/mfciEG8dXge5Bc9ny/JHsTsbYGxb3H/DApJdCUngURsqx2pJT4DuvDZ20T2DNTYWqa f3Mto5p1EAPqsXzMjXk0V2PsrmcaxDY6HcN91Tw5JOFKOzgeA0QtvoE/ZSdqE0j2TnXD8DBuqUs h7rmsCa2qqnZc X-Google-Smtp-Source: AGHT+IFu1r0fknjD96QmQU54NZeaJTSld6HXrwh8lrDcMpKUCdz8Ptis3MfqzOneT4vAqsA+wMPHNA== X-Received: by 2002:a17:907:86aa:b0:b04:33a1:7f1b with SMTP id a640c23a62f3a-b04b1446e50mr1215344166b.19.1757449459625; Tue, 09 Sep 2025 13:24:19 -0700 (PDT) Received: from localhost ([2a03:2880:30ff:3::]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b07830a7bc3sm46969566b.36.2025.09.09.13.24.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 09 Sep 2025 13:24:19 -0700 (PDT) From: Breno Leitao Date: Tue, 09 Sep 2025 13:24:00 -0700 Subject: [PATCH net-next 2/7] net: ethtool: add support for ETHTOOL_GRXRINGS ioctl Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250909-gxrings-v1-2-634282f06a54@debian.org> References: <20250909-gxrings-v1-0-634282f06a54@debian.org> In-Reply-To: <20250909-gxrings-v1-0-634282f06a54@debian.org> To: Andrew Lunn , "David S. Miller" , Eric Dumazet , Paolo Abeni , kuba@kernel.org, Simon Horman , "Michael S. Tsirkin" , Jason Wang , Xuan Zhuo , =?utf-8?q?Eugenio_P=C3=A9rez?= , Andrew Lunn Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux.dev, Breno Leitao , kernel-team@meta.com X-Mailer: b4 0.15-dev-dd21f X-Developer-Signature: v=1; a=openpgp-sha256; l=2335; i=leitao@debian.org; h=from:subject:message-id; bh=4qXNf5FPKeqB6oI1PmmIoli/4B/k2fYlPhoDMAj4Ltg=; b=owEBbQKS/ZANAwAIATWjk5/8eHdtAcsmYgBowIzu0yH3IVMs7fK4gZDpzXSyteK9WNUC9W295 SdSoczlAr6JAjMEAAEIAB0WIQSshTmm6PRnAspKQ5s1o5Of/Hh3bQUCaMCM7gAKCRA1o5Of/Hh3 bYD6D/9lJqcUOpNSwQqYATFngBRmXbtxTJJbT8gKRbinsx7LmqsT9rfMUOnNqVm6EqmnuRdb802 4YBtIm7OViTHvs4mIBT5FOtxpPMnx2vIme38yxQocH0NOS9yzHxiGrMg1GdP1KXKJTcfQPrAmjN BuhR43mukV1l3182jrSI7tt+WfKGoXqvaRbXyjCY8JCR2mAzDWuaRewyDNRCf/BCww0YFL4135J P8LfZ/CYiR81GsHOcw7scN1NajcVBkjKu878wVwzUT5lfa1VOfBVNcXWc/0ySSCKj0pWGlgc4Dx vxTl9Bs5LftPamGY8dEgUizjpICHLL5lT607vGZLSdPzpggo33lKuhStONeCk3SumP06KmQ5RGn WJDtg4F2Sxyh4TqSbS7BeaXb/Nm07serEdlF4t1/3u9Nhd0C5dDRztjwEeicl768N29qbztjFjt Sfb2SXqI+br8DqesRODoFa2aamRZOihhcGtgcvsxf6TYJd7oknBxys/7wTz0fOB2+Fo4wpYn7ua DLhTbz14UHH30XjPw6GHTqjISymcXp1iTbm/Ef0UKM4A7Vb/8m+k0Ju3jIMl9qxX32BpAIFANRv v7mOKztZv8Qjzf6XQkvwQJxJuSUVlnmM7OtjbWsVRe/Kk41oum+qnCW3V+p3l/7TY858hzlYfBC WTV0eG162l3eacw== X-Developer-Key: i=leitao@debian.org; a=openpgp; fpr=AC8539A6E8F46702CA4A439B35A3939FFC78776D This patch adds handling for the ETHTOOL_GRXRINGS ioctl command in the ethtool ioctl dispatcher. It introduces a new helper function ethtool_get_rxrings() that calls the driver's get_rxnfc() callback with appropriate parameters to retrieve the number of RX rings supported by the device. By explicitly handling ETHTOOL_GRXRINGS, userspace queries through ethtool can now obtain RX ring information in a structured manner. In this patch, ethtool_get_rxrings() is a simply copy of ethtool_get_rxnfc(). Signed-off-by: Breno Leitao --- net/ethtool/ioctl.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c index 15627afa4424f..4214ab33c3c81 100644 --- a/net/ethtool/ioctl.c +++ b/net/ethtool/ioctl.c @@ -1208,6 +1208,44 @@ static noinline_for_stack int ethtool_set_rxnfc(stru= ct net_device *dev, return 0; } =20 +static noinline_for_stack int ethtool_get_rxrings(struct net_device *dev, + u32 cmd, + void __user *useraddr) +{ + struct ethtool_rxnfc info; + size_t info_size =3D sizeof(info); + const struct ethtool_ops *ops =3D dev->ethtool_ops; + int ret; + void *rule_buf =3D NULL; + + if (!ops->get_rxnfc) + return -EOPNOTSUPP; + + ret =3D ethtool_rxnfc_copy_struct(cmd, &info, &info_size, useraddr); + if (ret) + return ret; + + if (info.cmd =3D=3D ETHTOOL_GRXCLSRLALL) { + if (info.rule_cnt > 0) { + if (info.rule_cnt <=3D KMALLOC_MAX_SIZE / sizeof(u32)) + rule_buf =3D kcalloc(info.rule_cnt, sizeof(u32), + GFP_USER); + if (!rule_buf) + return -ENOMEM; + } + } + + ret =3D ops->get_rxnfc(dev, &info, rule_buf); + if (ret < 0) + goto err_out; + + ret =3D ethtool_rxnfc_copy_to_user(useraddr, &info, info_size, rule_buf); +err_out: + kfree(rule_buf); + + return ret; +} + static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev, u32 cmd, void __user *useraddr) { @@ -3377,6 +3415,8 @@ __dev_ethtool(struct net *net, struct ifreq *ifr, voi= d __user *useraddr, rc =3D ethtool_set_rxfh_fields(dev, ethcmd, useraddr); break; case ETHTOOL_GRXRINGS: + rc =3D ethtool_get_rxrings(dev, ethcmd, useraddr); + break; case ETHTOOL_GRXCLSRLCNT: case ETHTOOL_GRXCLSRULE: case ETHTOOL_GRXCLSRLALL: --=20 2.47.3