From nobody Thu Oct 2 19:35:14 2025 Received: from mail-ed1-f54.google.com (mail-ed1-f54.google.com [209.85.208.54]) (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 8C8FD30DD35 for ; Fri, 12 Sep 2025 15:59:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.54 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757692774; cv=none; b=u+jq1pU/YXeBiPg6Ig/1bwNtuPGaQzQJzkWqn2hPpIXhZ88evDBpB0U9hpmi79ji0VuhBbcECdQdgqDPeDQ4P4sYeBPAQb7eREPV8pG2m4tKTKoU9WgAW3GEnkeBBZWE0c7hWGaZiIR56uIEc5LRxQRT62DM30Q3SoV2KAfwa4M= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757692774; c=relaxed/simple; bh=4qXNf5FPKeqB6oI1PmmIoli/4B/k2fYlPhoDMAj4Ltg=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=K0Zqs2Sds9GT6JE1wSczpcDX7cHJmOOr+miv+5kLf7ShsA+HsaeJGvbZmE35DSODhmDFa9lsqK8+T9uFN+Y+VevxMVpXMIC/0pkTCxPxG4eee61ODKYjwt4J2Oldxfqmkq+2V1bXfdn+p963JWodvkHr0qNwlo+N0rICjpWYCdk= 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=209.85.208.54 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-ed1-f54.google.com with SMTP id 4fb4d7f45d1cf-628f29d68ecso4197054a12.3 for ; Fri, 12 Sep 2025 08:59:32 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1757692771; x=1758297571; 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=PAPk5OEPudIXVZtpcFsNGSdZ2P52LhYCmoYxJz/Awxwkz53pWJ0Mn0YmrYWSE58kS2 SHcDD1efwzL1mh/xH57VKRy4v9fw8b+/T6E2YAiD05JpRQ3DQzUM2fJVFGrWcL7zYb7C zUjVxTVXWM/sqkXDChK/+BNiOReQegxqF97VPGg1Pe8B8fEUSPDzXuso0VQkcpaT2kc6 dBUHk592EbQznIKhD/G/0KOYaYhlrUp3YhbG2BAhSk3YrdCcC3xptwb+F2wtAyJKC8IJ IaslkqlCdHzGQdDdi0elgc1K6Lcc7gcXly4s9/pmkR2XcD1E7xO38ckQDVagxRPQGBeF y2bA== X-Forwarded-Encrypted: i=1; AJvYcCWJlRHx+LT0sYTxRvxTRPUI0SLY/EHAui9oVXJoqjyTnaGQbXPiS09gVvjlxlY08KyymLhY7dRTrXQjWOE=@vger.kernel.org X-Gm-Message-State: AOJu0YzcD+K9XdLx0hLfBHynqwP+HQG8Hti39gPOv6jaBTCx5NXRhOiB 01RxkinbJU//QijZzDIRyKkKFAmPBVwggf/UNSCW76vMKBmA5DFK6RXq X-Gm-Gg: ASbGnct6ugcGeTyIJx6EeMcNAsTZF86UUNmhXD4LA6Bc5s4M/inA8o5f7XYbJwdLZgd q+zVQzd733ZGXdVGXeCRWK+3pbfcMdWmv3glkFNZ4BkAfNdDhzunL5m+VeY26eTpq8tstVKj1xe 1OuqbfbGJPJZPH5Aifuv0QIb1LsKrSn+6MHOTm14FfQoynu23tkarbx96Uenhk6E+R3F+Q0SIaj 7trS0E7Z9Vg+MFpFDsOsL7NzbP0Voi9LpuAE48mPk3yLj0PIr7EyTQX96JqpqqfA5oaCLJb8xOU HRTn7ULdSDrxhYLZvSjbuDQXG0ENDCqpBxPTmrAHq/j5mPQ5Dy+MFb79P4NI6x2a5wviX6qHZeS +muqus+dsjf3O/g3zGDR6TO5A X-Google-Smtp-Source: AGHT+IFYMevSqL3g2aYQTcPeajtFC88rNpWFXEFv+GuBYebsuxBaKw/pWvRf3YPo2VcyVWyJ3BIZAg== X-Received: by 2002:a05:6402:21c9:b0:62a:a4f0:7e4f with SMTP id 4fb4d7f45d1cf-62ed82f1ae2mr3557772a12.29.1757692770879; Fri, 12 Sep 2025 08:59:30 -0700 (PDT) Received: from localhost ([2a03:2880:30ff:74::]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-62ec3400c3fsm3535438a12.39.2025.09.12.08.59.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 12 Sep 2025 08:59:30 -0700 (PDT) From: Breno Leitao Date: Fri, 12 Sep 2025 08:59:11 -0700 Subject: [PATCH net-next v2 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: <20250912-gxrings-v2-2-3c7a60bbeebf@debian.org> References: <20250912-gxrings-v2-0-3c7a60bbeebf@debian.org> In-Reply-To: <20250912-gxrings-v2-0-3c7a60bbeebf@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/ZANAwAIATWjk5/8eHdtAcsmYgBoxENdlaXSNStTYTALXrlkCB3WTj0T/uYjCPVoS 46LuuFRlZCJAjMEAAEIAB0WIQSshTmm6PRnAspKQ5s1o5Of/Hh3bQUCaMRDXQAKCRA1o5Of/Hh3 bZSnD/0c6x14xLVVFlG64pkExebY/Wg2ha3v+RU7+P4AgDSckNdFjd3sgud6gCZeULklQRDh3Xi zttTYmxlWsfmejR88F64jDnaomxVzaF+UZwOZzto15KaaqvOspyvpbA5WP6T3xHDUHL4WV2vbmb vWFGe/IzHlCZdPU5B0vBdNwlmB/QLFTfX56JfykLT6zFLZJRCnsj91UhNVQr47Isb2f4L793B8S ERF70m9DRQu1m0Mn2HdE/wZnEbXRDyV5RkR6+w3AcSP6OiViRtvHTDLiM4uS3Y4+IPpuYj+wz4Z Hx9iQxR+VZZewRYLJTfVjymed9eN7AJeKQXQOqjfG4m35smM0lBt41Toz6W9cVT+Ab/iL96J/hM zKs7xXDe3vQt4XnibQg/rwrH3hO4o4j0UcktZxMUDFzx5L7Gp/scvIl7urffe/dEgN6AtFxx8AJ F6Gh8VwPh2GPqUr7NFJWXF4EELVTYHbvcwECm8/yhakzAmXkMCCHbEYO/vuezZSPrQf579CVOMe oCvana2YaCpqNtJ7gUE+/tytahAwDDyeZNld/PlU+TVDFVc9SyWD1qndUgZJ2TQs5g60rxzNez9 PcNmHmQYVX2Zo106mKivcazwcbZdNomA5x19UkueevX0mJfVnf7pXf+aSYZct8lCI+gaSlVhwZo a43wKjrUKLHOn1w== 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