From nobody Thu Apr 9 12:08:22 2026 Received: from smtpout-04.galae.net (smtpout-04.galae.net [185.171.202.116]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2BB6D3E5ECB for ; Mon, 9 Mar 2026 15:28:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.171.202.116 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773070114; cv=none; b=sx3Y0s2stIO5wf/GYNnV2iWi6wJTDQyHxR7iX+GE1blRF0pKPkMl5nQa06OOPvzOYtmJQwOi1hjzM7QCfGtstlFQ9RQiRpUMDJotke//9RbC8gPCU3HiuQWcHTcr3Ex6TqUmPa3u9mv6RTHK7lzoTpw0plYZbdXHeFcwsF+xuiQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773070114; c=relaxed/simple; bh=E9qR2vOG8WkZOD0nxPzXuGoz3c0zCkCOYtOfaGLhCa4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=KjSKvWsifwiPSdXRfBgDORXOPRqbqPqze/cQHBxHJRMwTkQXHrZs935v7Vur3Ca0b4NWCyQVcCYgp/VfW77c6LpU3TdG28o15QC9m/4CgsVHNE+0d9aRernk4k6rSJeDcZ3p0g+IwuqQ1giyqoDPCzny3i1Zx63Weh0NoxD3w5s= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=sAIp6FBN; arc=none smtp.client-ip=185.171.202.116 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="sAIp6FBN" Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-04.galae.net (Postfix) with ESMTPS id 33C77C4287A; Mon, 9 Mar 2026 15:28:52 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id C57295FFB8; Mon, 9 Mar 2026 15:28:31 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 3DB5110369C03; Mon, 9 Mar 2026 16:28:27 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1773070110; h=from:subject:date:message-id:to:cc:mime-version: content-transfer-encoding:in-reply-to:references; bh=gRcZz70adB/4WlmS5Oc/7ambooNSagYS9fVOwMvuSxc=; b=sAIp6FBNLuL0Ut1sOaYpSI4pv+q4NY78aqWjAkBOBTPsACRvd/4Y6eFRLuM0YO6uhr/CV0 zX6Wd1g5/TDSMrJ4hWdOXeUiHoa2XCFM6lWu5s/ndAtccQbb2yeyXOzs7NrA1yrVd3Jcvk +dJGpby1yAxG3hnrS6y12n0o37kYAkZUis+cENdH/GUjN70uzLLyQHWiHLtY2IOZqeKy02 3hsg8ccmrrFodJ9h26jiuLHufPdBYMX8MURBsppBdL1KT323sVv1nKRCf0/IDWFfr+8kqu +guKAG9OgbFmMd836MDH5aix89CHzV6OBEEQHZgZy4IWWqRuMvcnpngbb9081Q== From: Maxime Chevallier To: davem@davemloft.net, Andrew Lunn , Jakub Kicinski , Eric Dumazet , Paolo Abeni , Russell King , Heiner Kallweit Cc: Maxime Chevallier , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, thomas.petazzoni@bootlin.com, Christophe Leroy , Herve Codina , Florian Fainelli , Vladimir Oltean , =?UTF-8?q?K=C3=B6ry=20Maincent?= , =?UTF-8?q?Marek=20Beh=C3=BAn?= , Oleksij Rempel , =?UTF-8?q?Nicol=C3=B2=20Veronese?= , Simon Horman , mwojtas@chromium.org, Romain Gantois , Daniel Golle , Dimitri Fedrau , =?UTF-8?q?Bj=C3=B6rn=20T=C3=B6pel?= Subject: [PATCH net-next v7 09/10] netlink: specs: Add ethernet port listing with ethtool Date: Mon, 9 Mar 2026 16:27:45 +0100 Message-ID: <20260309152747.702373-10-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20260309152747.702373-1-maxime.chevallier@bootlin.com> References: <20260309152747.702373-1-maxime.chevallier@bootlin.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Last-TLS-Session-Version: TLSv1.3 Content-Type: text/plain; charset="utf-8" Ethernet network interfaces may have more than one front-facing port. The phy_port infrastructure was introduced to keep track of these ports, and allow userspace to know about the presence and capability of these ports. Add a ethnl netlink message to report this information. Signed-off-by: Maxime Chevallier --- Documentation/netlink/specs/ethtool.yaml | 50 +++++++++++++++++++ Documentation/networking/ethtool-netlink.rst | 35 +++++++++++++ .../uapi/linux/ethtool_netlink_generated.h | 19 +++++++ 3 files changed, 104 insertions(+) diff --git a/Documentation/netlink/specs/ethtool.yaml b/Documentation/netli= nk/specs/ethtool.yaml index 0a2d2343f79a..ab0ff17d9195 100644 --- a/Documentation/netlink/specs/ethtool.yaml +++ b/Documentation/netlink/specs/ethtool.yaml @@ -210,6 +210,10 @@ definitions: - name: discard value: 31 + - + name: port-type + type: enum + entries: [mdi, sfp] =20 attribute-sets: - @@ -1890,6 +1894,32 @@ attribute-sets: name: link type: nest nested-attributes: mse-snapshot + - + name: port + attr-cnt-name: --ethtool-a-port-cnt + attributes: + - + name: header + type: nest + nested-attributes: header + - + name: id + type: u32 + - + name: supported-modes + type: nest + nested-attributes: bitset + - + name: supported-interfaces + type: nest + nested-attributes: bitset + - + name: type + type: u8 + enum: port-type + - + name: vacant + type: u8 =20 operations: enum-model: directional @@ -2842,6 +2872,26 @@ operations: - worst-channel - link dump: *mse-get-op + - + name: port-get + doc: Get ports attached to an interface + + attribute-set: port + + do: &port-get-op + request: + attributes: + - header + - id + reply: + attributes: + - header + - id + - supported-modes + - supported-interfaces + - type + - vacant + dump: *port-get-op =20 mcast-groups: list: diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/n= etworking/ethtool-netlink.rst index 32179168eb73..6ac807a8cae5 100644 --- a/Documentation/networking/ethtool-netlink.rst +++ b/Documentation/networking/ethtool-netlink.rst @@ -2526,6 +2526,40 @@ Within each channel nest, only the metrics supported= by the PHY will be present. See ``struct phy_mse_snapshot`` kernel documentation in ``include/linux/phy.h``. =20 +PORT_GET +=3D=3D=3D=3D=3D=3D=3D=3D + +Retrieve information about the physical connection points of a network dev= ice, +referred to as "ports". User needs to specify a PORT_ID for the DO operati= on, +in which case the DO request returns information about that specific port. + +As there can be more than one port, the DUMP operation can be used to list= the +ports present on a given interface, by passing an interface index or name = in +the dump request. + +Request contents: + + =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D + ``ETHTOOL_A_PORT_HEADER`` nested request header + ``ETHTOOL_A_PORT_ID`` u32 port id + =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D + +Kernel response contents: + + =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D =3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D + ``ETHTOOL_A_PORT_HEADER`` nested request header + ``ETHTOOL_A_PORT_ID`` u32 the port's unique identi= fier, + per netdevice. + ``ETHTOOL_A_PORT_SUPPORTED_MODES`` bitset bitset of supported link= modes + ``ETHTOOL_A_PORT_SUPPORTED_INTERFACES`` bitset bitset of supported MII + interfaces + ``ETHTOOL_A_PORT_TYPE`` u8 the port type + ``ETHTOOL_A_PORT_VACANT`` u8 for non-mdi ports, indic= ates + if the port is connected= to + another device that could + expose a MDI + =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D =3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D + Request translation =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =20 @@ -2636,4 +2670,5 @@ are netlink only. n/a ``ETHTOOL_MSG_PHY_GET`` ``SIOCGHWTSTAMP`` ``ETHTOOL_MSG_TSCONFIG_GET`` ``SIOCSHWTSTAMP`` ``ETHTOOL_MSG_TSCONFIG_SET`` + n/a ``ETHTOOL_MSG_PORT_GET`` =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D diff --git a/include/uapi/linux/ethtool_netlink_generated.h b/include/uapi/= linux/ethtool_netlink_generated.h index 556a0c834df5..f2a5bb666c4c 100644 --- a/include/uapi/linux/ethtool_netlink_generated.h +++ b/include/uapi/linux/ethtool_netlink_generated.h @@ -78,6 +78,11 @@ enum ethtool_pse_event { ETHTOOL_PSE_EVENT_SW_PW_CONTROL_ERROR =3D 64, }; =20 +enum ethtool_port_type { + ETHTOOL_PORT_TYPE_MDI, + ETHTOOL_PORT_TYPE_SFP, +}; + enum { ETHTOOL_A_HEADER_UNSPEC, ETHTOOL_A_HEADER_DEV_INDEX, @@ -837,6 +842,18 @@ enum { ETHTOOL_A_MSE_MAX =3D (__ETHTOOL_A_MSE_CNT - 1) }; =20 +enum { + ETHTOOL_A_PORT_HEADER =3D 1, + ETHTOOL_A_PORT_ID, + ETHTOOL_A_PORT_SUPPORTED_MODES, + ETHTOOL_A_PORT_SUPPORTED_INTERFACES, + ETHTOOL_A_PORT_TYPE, + ETHTOOL_A_PORT_VACANT, + + __ETHTOOL_A_PORT_CNT, + ETHTOOL_A_PORT_MAX =3D (__ETHTOOL_A_PORT_CNT - 1) +}; + enum { ETHTOOL_MSG_USER_NONE =3D 0, ETHTOOL_MSG_STRSET_GET =3D 1, @@ -890,6 +907,7 @@ enum { ETHTOOL_MSG_RSS_CREATE_ACT, ETHTOOL_MSG_RSS_DELETE_ACT, ETHTOOL_MSG_MSE_GET, + ETHTOOL_MSG_PORT_GET, =20 __ETHTOOL_MSG_USER_CNT, ETHTOOL_MSG_USER_MAX =3D (__ETHTOOL_MSG_USER_CNT - 1) @@ -951,6 +969,7 @@ enum { ETHTOOL_MSG_RSS_CREATE_NTF, ETHTOOL_MSG_RSS_DELETE_NTF, ETHTOOL_MSG_MSE_GET_REPLY, + ETHTOOL_MSG_PORT_GET_REPLY, =20 __ETHTOOL_MSG_KERNEL_CNT, ETHTOOL_MSG_KERNEL_MAX =3D (__ETHTOOL_MSG_KERNEL_CNT - 1) --=20 2.49.0