From mboxrd@z Thu Jan 1 00:00:00 1970 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 C7CD84CDA2B for ; Fri, 16 Oct 2026 13:32:33 +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=1792157555; cv=none; b=Ld5xrgO9HRi2JN6gjEtdp0Ri/bH43f2kkP+CWPZhciPrUtwEdONCRl74smLXYM+pE7vv57nnl22DwVH3xtB2l8UHrDkWjehAulLuVQ+3xUUYCfvGpl0IuM5VKAyRBQ23o2/eMRw2FthIK8UjM/YgXsWwWA2XTnUGLxAas8pH6gg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792157555; c=relaxed/simple; bh=ae3MwkoBW3nlAUpijgJ/aO6xqJlGdhPyPMlz9ejyQZA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Wwa16e1dLl0W1uCPy9GY1xwllRP3o/zjTGIpmorW6bse2Q8AJDR/Pk7DhE59D+nVCLWTkCi0asVpk5lzjiGrNNZ4a4K3sUE1X/lK2cFqrKaBQKCWavhzlCb+5MF0U34HvFrDS4mG9J05YzgICIYk6J7RrX/w+IHeJTsoYPfI9Uo= 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=n7mxBWSB; 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="n7mxBWSB" Received: from smtpout-01.galae.net (smtpout-01.galae.net [212.83.139.233]) by smtpout-04.galae.net (Postfix) with ESMTPS id D5C7FC62214; Fri, 16 Oct 2026 13:33:28 +0000 (UTC) Received: from mail.galae.net (mail.galae.net [212.83.136.155]) by smtpout-01.galae.net (Postfix) with ESMTPS id 0E0FA6075D; Fri, 16 Oct 2026 13:32:32 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id D088D10328719; Fri, 16 Oct 2026 15:32:22 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=dkim; t=1792157546; h=from:subject:date:message-id:to:cc:mime-version: content-transfer-encoding:in-reply-to:references; bh=jUq8WPOwCb19BWYbJyLgQShvv0dGGuE9p1Z+xB4oKE4=; b=n7mxBWSB56ouY7Qdyavu9SFeR9M7U0zsBfIiUzaCl34ylDhd+mSSOKjudOd3+si+Gx3hIk QKGL1FXaoh6NwDOxEsP4eXVojw1k629dFK/eK2p+qlqkE8D19VE4BAoKf8j2hb8u58Dh5B p7NLB1kzimEH866Q6Mc+oCBlHRGjlyfdB+p8Q+4piswen9/pkVgo3OfRKLoRQOXHwq8O8u S+ttJ4HjqnJnnVClTNQ874VwfFMYj2u7R1gC4PNY8L/Al76YTT9KkKCZwxD8c42QOcd/mF wdjkfYlgTdhMXNtnCo3W03ulac7Oa8db1uECf3JtYEPr1yZilgRxbT5mblD4Zw== 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 , Frank Wunderlich , Pietro Ameruoso , Aleksei Sviridkin , "Christophe Leroy (CS GROUP)" Subject: [PATCH net-next v19 08/10] netlink: specs: Add ethernet port listing with ethtool Date: Fri, 16 Oct 2026 15:31:03 +0200 Message-ID: <20261016133107.54054-9-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261016133107.54054-1-maxime.chevallier@bootlin.com> References: <20261016133107.54054-1-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. Reviewed-by: Christophe Leroy (CS GROUP) Signed-off-by: Maxime Chevallier --- Documentation/netlink/specs/ethtool.yaml | 55 +++++++++++++++++++ Documentation/networking/ethtool-netlink.rst | 36 ++++++++++++ .../uapi/linux/ethtool_netlink_generated.h | 22 ++++++++ 3 files changed, 113 insertions(+) diff --git a/Documentation/netlink/specs/ethtool.yaml b/Documentation/netlink/specs/ethtool.yaml index a66594ad9e73..a9cb02538783 100644 --- a/Documentation/netlink/specs/ethtool.yaml +++ b/Documentation/netlink/specs/ethtool.yaml @@ -212,6 +212,11 @@ definitions: - name: discard value: 31 + - + name: port-type + doc: type of physical connector + type: enum + entries: [mdi, sfp] attribute-sets: - @@ -1907,6 +1912,32 @@ 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: u32 + enum: port-type + - + name: upstream-port + type: u32 operations: enum-model: directional @@ -2861,6 +2892,30 @@ operations: - worst-channel - link dump: *mse-get-op + - + name: port-get + doc: Get ports attached to an interface + + attribute-set: port + + do: + request: + attributes: + - header + - id + reply: &port-get-op-reply + attributes: + - header + - id + - supported-modes + - supported-interfaces + - type + - upstream-port + dump: + request: + attributes: + - header + reply: *port-get-op-reply mcast-groups: list: diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst index 393f2b6d3863..eba226c79ec3 100644 --- a/Documentation/networking/ethtool-netlink.rst +++ b/Documentation/networking/ethtool-netlink.rst @@ -247,6 +247,7 @@ Userspace to kernel: ``ETHTOOL_MSG_RSS_CREATE_ACT`` create an additional RSS context ``ETHTOOL_MSG_RSS_DELETE_ACT`` delete an additional RSS context ``ETHTOOL_MSG_MSE_GET`` get MSE diagnostic data + ``ETHTOOL_MSG_PORT_GET`` get port information ===================================== ================================= Kernel to userspace: @@ -305,6 +306,7 @@ Kernel to userspace: ``ETHTOOL_MSG_RSS_CREATE_NTF`` additional RSS context created ``ETHTOOL_MSG_RSS_DELETE_NTF`` additional RSS context deleted ``ETHTOOL_MSG_MSE_GET_REPLY`` MSE diagnostic data + ``ETHTOOL_MSG_PORT_GET_REPLY`` port information ======================================== ================================= ``GET`` requests are sent by userspace applications to retrieve device @@ -2537,6 +2539,39 @@ 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_UPSTREAM_PORT`` u32 If any, the index of the MII + port that feeds into this + port. + ======================================= ====== ============================= + Request translation =================== @@ -2647,4 +2682,5 @@ 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 8134baf7860f..660e0c08a766 100644 --- a/include/uapi/linux/ethtool_netlink_generated.h +++ b/include/uapi/linux/ethtool_netlink_generated.h @@ -78,6 +78,14 @@ enum ethtool_pse_event { ETHTOOL_PSE_EVENT_SW_PW_CONTROL_ERROR = 64, }; +/* + * type of physical connector + */ +enum ethtool_port_type { + ETHTOOL_PORT_TYPE_MDI, + ETHTOOL_PORT_TYPE_SFP, +}; + enum { ETHTOOL_A_HEADER_UNSPEC, ETHTOOL_A_HEADER_DEV_INDEX, @@ -840,6 +848,18 @@ 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_UPSTREAM_PORT, + + __ETHTOOL_A_PORT_CNT, + ETHTOOL_A_PORT_MAX = (__ETHTOOL_A_PORT_CNT - 1) +}; + enum { ETHTOOL_MSG_USER_NONE = 0, ETHTOOL_MSG_STRSET_GET = 1, @@ -893,6 +913,7 @@ 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) @@ -954,6 +975,7 @@ 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) -- 2.56.0