From nobody Thu Oct 2 17:01:15 2025 Received: from mail-ej1-f48.google.com (mail-ej1-f48.google.com [209.85.218.48]) (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 0B5C72FF671 for ; Mon, 15 Sep 2025 10:47:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.48 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757933264; cv=none; b=tPlro7rTSri9CSZQYbu9O9ZxVNj96T51yRD7bwnuRs1LN+x/9Zh/gF7SJoD1dfEjTsj6NvFA3ShFwqWJLY5WQeO60iJ6lDPuhP3iE7oe1hMyXWCSdaOIwViTNJEkyXtSnbqxuBSOr+orCvDiHJk8MFgFMI5VXhhILPvl4A0jZhs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757933264; c=relaxed/simple; bh=4qXNf5FPKeqB6oI1PmmIoli/4B/k2fYlPhoDMAj4Ltg=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=WvfdoJgSy4G/JE5Ohq6Z5ERDhMp45rdzjzGdp0YOmFmL8NNH3oFr/8XqJmsqzNrYy6VX5e+9hQG9uw2y9ZS6ZRNY4454u2HdzCe76l8eTLJ+ujp2P2/9Vv9uVkn4HyWVOykBFqu1XONaNJ8byej/SY3mx9quwMtbPvBdvgEMAlU= 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=209.85.218.48 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-f48.google.com with SMTP id a640c23a62f3a-b00a9989633so775504266b.0 for ; Mon, 15 Sep 2025 03:47:42 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1757933261; x=1758538061; 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=LjNFjig5Vp5kGV6w0zYDQ5Yf1J25erYx9VtU/07D/V4PEOBBdwlq3sQMNcBLS6iTMc whRqEeDjI9WuCvKn53rcfGrkKvEqE6Aq2p4ex6vlE7/27g4WxC1knksp/VIiKNlIP4Fs cMhYbZsVc0EOpEVLSCagG4clQEZtDeBuQ+6heSf49u4LdMuOmGmdgbvc3xAikpnt5XHK qTFm7j25iAmivZl6q6/p1zZvGA4eO4+BBDAPV6AJxQEf+CJ2EV9j4ohFBOY5/W0Ejopm nau75MHfeochKCDOOY2xtbX/bnenyPek8Fw6phHcvmAy/K3bvXdm3FSTUjKPZJC+g4ms GcSA== X-Forwarded-Encrypted: i=1; AJvYcCXdrc3Z/F6J1vitzzWBud+BDZ4s3QrWaQqGtY4c6zJNWq59lEqzKeq0sKClnTXcwTaOaMspiYr8xE89uMY=@vger.kernel.org X-Gm-Message-State: AOJu0YwMVvho0lWhkppdkR4l9sbG6z9C0z36laxO5K1LO+LZIrHyhVSK Gi0179dHAFTWZx3Y3CDggsTjVXcvCaDR1jkk6OT5oOxfGhxkeuHwbsYY X-Gm-Gg: ASbGncs05xvOAuKsP/8eE331Hwvvlqdyjs7Q27YTFvlMlP87FG55hD9rh+t3GIfZbaY wjKxQpqbRBoo6/Dtoijzc5br62bAX+TVFTRXNWHqKnSER09hLQQia4D0RDO/XM+kpotSfenwuD7 nG6zBl1qXEqv6Mpkt2zKP2spKEehuM0ip/lZl7Amb5qW8R8cZkc98Af9AnGRQKlAQe+SsE5ljZr 611zv2kV/Op6179ub1hCy/1tvA5ifFjUkCjZDAGxxrpSzerZJBGjNxZln/Y7rJgPwqz8clTGdj2 ZJhMtLc2AC7SLTbXKx5VSZjFZCGLfV0BTCGXQDPQ3s16dpknyxeOjVRD92IqOtI6eiBOhqPCJPt pR9eiPMd9SsD2MNm3v2rEUF0= X-Google-Smtp-Source: AGHT+IEzrAYV3e2uFiTM5MXBqo/NTJ3IVSDFCMfGVNjCDejj0OtCyUQ+mWpQqJvCtIu4AA/OwNmzVw== X-Received: by 2002:a17:906:f58c:b0:b0b:f033:fe7 with SMTP id a640c23a62f3a-b0bf0334b15mr693100266b.31.1757933261176; Mon, 15 Sep 2025 03:47:41 -0700 (PDT) Received: from localhost ([2a03:2880:30ff:7::]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b07de03d93csm533262866b.12.2025.09.15.03.47.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Sep 2025 03:47:40 -0700 (PDT) From: Breno Leitao Date: Mon, 15 Sep 2025 03:47:27 -0700 Subject: [PATCH net-next v3 2/8] 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: <20250915-gxrings-v3-2-bfd717dbcaad@debian.org> References: <20250915-gxrings-v3-0-bfd717dbcaad@debian.org> In-Reply-To: <20250915-gxrings-v3-0-bfd717dbcaad@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 , Lei Yang , 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/ZANAwAIATWjk5/8eHdtAcsmYgBox+7H8fXaiNOKNgmrDeSxkckmSM6xgV62vaFWD rIzghWru9iJAjMEAAEIAB0WIQSshTmm6PRnAspKQ5s1o5Of/Hh3bQUCaMfuxwAKCRA1o5Of/Hh3 bULdD/415VaKUOR/BPAoiHKr1rMaIykRwiHqaJ71/dorVDr7COSHjdx3ROsO6bXUlJOENIcbVT4 tsPHMoggNbogAspHh/sSEunFcrj9q7jqCvUZ71ez5bHLwXxRr0883cSTZINoefmTM6kL70+rLhL AdcTRF5Whqej4M+r1UuSOPMh5pzR5RQ9KiUgih9OdG3T4n5DMXrEBLEPhE+4DYvEPBO5GwPbQK6 lD5+vQWWGC6z8+FeNrXyP0BigbKnr95TdRiEwca3OT+YNLRT8Fq4qGmfyvjZQSx2Sn4x7usbQ2E Q110qhyeAkIyvoV5iCJn9KKCdDiidJuhBO+DWWMjpcLhOv4StvpLDwRKcR2PubvitJpLBhcyBTM q6dxqD5Lx4YRoQ3tigHCBPYpQJyu7ZXQzIG4j+OM2O9dp7c4MzPkrsHI1wsr9azn9Ls4HwHyz0t Kylcz3BAMV0X42WJyyfHSJHmjAz2HEy0yl5EwjYgp4tws2VHRr1ZZ7O8LyDZ4d1fb9Hsp2ysB2v iKGQsGoEU8byxoLh9tDF54f5zYYKb1ppyHePkX582v8yxn3P3nBVRbJrUhYpyMg7zSpsBpWaR++ a3YDBYh9zI/O+u9llkkmGZSSs76zBar8lHA8zcXoEnJpSFSc00WmQO2z4mnXH/WJdsD++ZbHNUH MBxU8fbUuOPs/Uw== 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