From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpout-02.galae.net (smtpout-02.galae.net [185.246.84.56]) (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 6442935EDBF for ; Tue, 27 Jan 2026 13:42:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.246.84.56 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769521371; cv=none; b=Fx8DTsX1FaCX++sa+MvX2/cRuKJmnQpEGhZo48BlfGsFJnU5Qq0TRu1zxQpP/Na4jSO22uY23/vmIoJG8sSDHhG2GMxvcxOqTVerAvSDcIu3S9ZE1jgi4bHDPRiOogbHUyME6jUOShN+Nf+ylkqJ+XPEmuNXLGnswkvxEwY3BeA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769521371; c=relaxed/simple; bh=dIW9DmuRZ6tKWsiS7mSRMUwkt75gVBWc0F9T4GKBWXA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=t1Xw8aJcTuL1ZTbXpAvKR05bhfXLjmcZOw0QT8pEdvDW1+y4X6UmwjwoKF4j/VgWi+UtRMtanZU5Ae8pUxRP7Xiepppn+FmpRMYfosd9+1z1bSGLTPWG5fuhj/vuM+c4yHXS+lQ1zEMgeO0OqgBS+bIXuW1DdkQgTpzxs8anSR0= 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=QFgv3IBR; arc=none smtp.client-ip=185.246.84.56 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="QFgv3IBR" Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-02.galae.net (Postfix) with ESMTPS id 14AA11A2A84; Tue, 27 Jan 2026 13:42:49 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id DC03B606F5; Tue, 27 Jan 2026 13:42:48 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 7971F119A8647; Tue, 27 Jan 2026 14:42:45 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1769521367; h=from:subject:date:message-id:to:cc:mime-version: content-transfer-encoding:in-reply-to:references; bh=JE1ajPZV3RBLMmNHm3FO3KqAiha9kx7cpVHokUOQiNc=; b=QFgv3IBR6MRr+C4KXQbQZIogintzCljAemoiXBDCIzOurWAzlnU+RQBeMNYVARGhEHvCGP G17QkATcyvP/pkbseAvcJ19VEUhfrTmAZO8+G1WwjwvZM0XhgjjYxDnP/hX4z2pK2s6WdG Gxox07/cc92+8cvAqSXTtYti4JLg2Y2cI28lwlO462+07wIsJ8YnJtLXEQzYpm1HdmDYLn GN0C7wT3nVm9ma2RSE9MwQWSwEuTF1HFmBwrzxmFu/vihzjxKcwjHbsELtn82wy76HqBwR A4WCd71MjPQLQWUrFzeRCo06BktvzaR+4DlyH35XeJ0Doko8bPTwnkjcmPDRGw== 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 Subject: [PATCH net-next 12/13] netlink: specs: Add ethernet port listing with ethtool Date: Tue, 27 Jan 2026 14:42:00 +0100 Message-ID: <20260127134202.8208-13-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20260127134202.8208-1-maxime.chevallier@bootlin.com> References: <20260127134202.8208-1-maxime.chevallier@bootlin.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Last-TLS-Session-Version: TLSv1.3 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/netlink/specs/ethtool.yaml index 0a2d2343f79a..f0f424009fb0 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] 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: occupied + type: u8 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 + - occupied + dump: *port-get-op mcast-groups: list: diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst index af56c304cef4..450004d545b8 100644 --- a/Documentation/networking/ethtool-netlink.rst +++ b/Documentation/networking/ethtool-netlink.rst @@ -2522,6 +2522,40 @@ 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``. +PORT_GET +======== + +Retrieve information about the physical connection points of a network device, +referred to as "ports". User needs to specify a PORT_ID for the DO operation, +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: + +==================================== ====== ================================= + ``ETHTOOL_A_PORT_HEADER`` nested request header + ``ETHTOOL_A_PORT_ID`` u32 port id + ==================================== ====== =============================== + +Kernel response contents: + + ===================================== ====== ============================= + ``ETHTOOL_A_PORT_HEADER`` nested request header + ``ETHTOOL_A_PORT_ID`` u32 the port's unique identifier, + per netdevice. + ``ETHTOOL_A_PORT_SUPPORTED_MODES`` bitset bitset of supported linkmodes + ``ETHTOOL_A_PORT_SUPPORTED_INTERFACES`` bitset bitset of supported MII + interfaces + ``ETHTOOL_A_PORT_TYPE`` u32 the port type + ``ETHTOOL_A_PORT_OCCUPIED`` u8 for non-mdi ports, indicates + if the port is connected + another device that could + expose a MDI + ===================================== ====== ============================= + Request translation =================== @@ -2632,4 +2666,5 @@ 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`` =================================== ===================================== diff --git a/include/uapi/linux/ethtool_netlink_generated.h b/include/uapi/linux/ethtool_netlink_generated.h index 556a0c834df5..7ccd864a6e38 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 = 64, }; +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 = (__ETHTOOL_A_MSE_CNT - 1) }; +enum { + ETHTOOL_A_PORT_HEADER = 1, + ETHTOOL_A_PORT_ID, + ETHTOOL_A_PORT_SUPPORTED_MODES, + ETHTOOL_A_PORT_SUPPORTED_INTERFACES, + ETHTOOL_A_PORT_TYPE, + ETHTOOL_A_PORT_OCCUPIED, + + __ETHTOOL_A_PORT_CNT, + ETHTOOL_A_PORT_MAX = (__ETHTOOL_A_PORT_CNT - 1) +}; + enum { ETHTOOL_MSG_USER_NONE = 0, ETHTOOL_MSG_STRSET_GET = 1, @@ -890,6 +907,7 @@ enum { ETHTOOL_MSG_RSS_CREATE_ACT, ETHTOOL_MSG_RSS_DELETE_ACT, ETHTOOL_MSG_MSE_GET, + ETHTOOL_MSG_PORT_GET, __ETHTOOL_MSG_USER_CNT, ETHTOOL_MSG_USER_MAX = (__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, __ETHTOOL_MSG_KERNEL_CNT, ETHTOOL_MSG_KERNEL_MAX = (__ETHTOOL_MSG_KERNEL_CNT - 1) -- 2.49.0