From patchwork Wed Aug 28 15:25:10 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Chevallier X-Patchwork-Id: 13781492 X-Patchwork-Delegate: mkubecek+ethtool@suse.cz Received: from relay9-d.mail.gandi.net (relay9-d.mail.gandi.net [217.70.183.199]) (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 8E1391A38D2; Wed, 28 Aug 2024 15:25:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.199 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724858725; cv=none; b=dK8ys7u4XYgrZDTwLG+/WATBFgox4Lj52GFM7Zl5Op42NqXHrw+MjTP2nZibuMzDEMIAwckGhpvb3bTHNxl9JxM89Fz+lN37wKkbNFWFle9KqnvUyowZ77CJ6ssleyzI4Ry+5JvOIJaToPnelAK4tAwA+FJzh/SOkUU2m4iQ1ts= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724858725; c=relaxed/simple; bh=XOnIHnAzGcvNb3/+PxifdldPSqUMn6wKk1c79lS1uzU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gPVhFR4q/e7TY1wgDcI1aWzk704+7P8RhyhRwgdPu2iBxAkrloDCY56Kswfqs0LSKZKQwdkt0dt6AGx5RcmRvtrHWB9jaie3GD33aYMWiqjQqMjAgv7s6SKS51h8eLiiHmz+txP1DKa8o3GWtD9XOVtoBFLmQ+UvVCO5e9JsgWg= 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=Um+NmXV5; arc=none smtp.client-ip=217.70.183.199 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="Um+NmXV5" Received: by mail.gandi.net (Postfix) with ESMTPSA id 004E0FF80D; Wed, 28 Aug 2024 15:25:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1724858721; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=KzQLVkiBNJvK6DrODMY4izWhDhtO/PtQ39gm230BHl0=; b=Um+NmXV55A/neplMEEXXY4uaOf0dg9iKvPih+wFYKjhAtlMEJc2crS7tOgG+Q+FxlFLQE3 dsy/K7C7zEfDuO9+aYSuuKGRUCMkNzYIqnbQE+il8Iupim0D0WfNHNPTT3Zq/vwY1YnwJb X399W2pzOQrEaQBBnGpb2Txq9fleB1joBzq0LAT8h9bDVS8HeXqAblGJY0FC32frDzVSQx 7MjzL/xkOe5bfT8ndzc7HkUPeT38j8puXeDTD7bxtOj8bjn185wtAiKwSeUHDE1rvv+fE5 I1XWzXuj47mjtdu0bbWEZ806teLClE+RijOlnES4/hhPX0oKmaJ5NUhgLSskvQ== From: Maxime Chevallier To: davem@davemloft.net, Michal Kubecek Cc: Maxime Chevallier , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, thomas.petazzoni@bootlin.com, Andrew Lunn , Jakub Kicinski , Eric Dumazet , Paolo Abeni , Russell King , linux-arm-kernel@lists.infradead.org, Christophe Leroy , Herve Codina , Florian Fainelli , Heiner Kallweit , Vladimir Oltean , =?utf-8?q?K=C3=B6ry_Maincent?= , Jonathan Corbet , =?utf-8?q?Marek_Beh=C3=BAn?= , Piergiorgio Beruto , Oleksij Rempel , =?utf-8?q?Nicol=C3=B2_Veronese?= , Simon Horman Subject: [PATCH ethtool-next v2 3/3] ethtool: Introduce a command to list PHYs Date: Wed, 28 Aug 2024 17:25:10 +0200 Message-ID: <20240828152511.194453-4-maxime.chevallier@bootlin.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20240828152511.194453-1-maxime.chevallier@bootlin.com> References: <20240828152511.194453-1-maxime.chevallier@bootlin.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-GND-Sasl: maxime.chevallier@bootlin.com X-Patchwork-Delegate: mkubecek+ethtool@suse.cz It is now possible to list all Ethernet PHYs that are present behind a given interface, since the following linux commit : 63d5eaf35ac3 ("net: ethtool: Introduce a command to list PHYs on an interface") This command relies on the netlink DUMP command to list them, by allowing to pass an interface name/id as a parameter in the DUMP request to only list PHYs on one interface. Therefore, we introduce a new helper function to prepare a interface-filtered dump request (the filter can be empty, to perform an unfiltered dump), and then uses it to implement PHY enumeration through the --show-phys command. Signed-off-by: Maxime Chevallier --- Makefile.am | 1 + ethtool.8.in | 36 +++++++++++++++ ethtool.c | 5 ++ netlink/extapi.h | 1 + netlink/nlsock.c | 37 +++++++++++++++ netlink/nlsock.h | 2 + netlink/phy.c | 116 +++++++++++++++++++++++++++++++++++++++++++++++ 7 files changed, 198 insertions(+) create mode 100644 netlink/phy.c diff --git a/Makefile.am b/Makefile.am index 5a61a9a..862886b 100644 --- a/Makefile.am +++ b/Makefile.am @@ -48,6 +48,7 @@ ethtool_SOURCES += \ netlink/desc-rtnl.c netlink/cable_test.c netlink/tunnels.c \ netlink/plca.c \ netlink/pse-pd.c \ + netlink/phy.c \ uapi/linux/ethtool_netlink.h \ uapi/linux/netlink.h uapi/linux/genetlink.h \ uapi/linux/rtnetlink.h uapi/linux/if_link.h \ diff --git a/ethtool.8.in b/ethtool.8.in index a455b5d..816ac22 100644 --- a/ethtool.8.in +++ b/ethtool.8.in @@ -547,6 +547,9 @@ ethtool \- query or control network driver and hardware settings .IR FILE .RB [ pass .IR PASS ] +.HP +.B ethtool \-\-show\-phys +.I devname . .\" Adjust lines (i.e. full justification) and hyphenate. .ad @@ -1822,6 +1825,39 @@ is downloaded to the transceiver module, validated, run and committed. Optional transceiver module password that might be required as part of the transceiver module firmware update process. +.RE +.TP +.B \-\-show\-phys +Show the PHY devices attached to an interface, and the way they link together. +.RS 4 +.TP +.B phy_index +The PHY's index, that identifies it within the network interface. If the +interface has multiple PHYs, they will each have a unique index on that +interface. This index can then be used for commands that targets PHYs. +.TP +.B drvname +The name of the driver bound to this PHY device. +.TP +.B name +The PHY's device name, matching the name found in sysfs. +.TP +.B downstream_sfp_name +If the PHY drives an SFP cage, this field contains the name of the associated +SFP bus. +.TP +.B upstream_type \ mac | phy +Indicates the nature of the device the PHY is attached to. +.TP +.B upstream_index +If the PHY's upstream_type is +.B phy +, this field indicates the phy_index of the upstream phy. +.TP +.B upstream_sfp_name +If the PHY is withing an SFP/SFF module, this field contains the name of the +upstream SFP bus. + .SH BUGS Not supported (in part or whole) on all network drivers. .SH AUTHOR diff --git a/ethtool.c b/ethtool.c index 3bd777e..3591767 100644 --- a/ethtool.c +++ b/ethtool.c @@ -6254,6 +6254,11 @@ static const struct option args[] = { .xhelp = " file FILE\n" " [ pass PASS ]\n" }, + { + .opts = "--show-phys", + .nlfunc = nl_get_phy, + .help = "List PHYs" + }, { .opts = "-h|--help", .no_dev = true, diff --git a/netlink/extapi.h b/netlink/extapi.h index c882295..fd99610 100644 --- a/netlink/extapi.h +++ b/netlink/extapi.h @@ -56,6 +56,7 @@ int nl_set_mm(struct cmd_context *ctx); int nl_gpse(struct cmd_context *ctx); int nl_spse(struct cmd_context *ctx); int nl_flash_module_fw(struct cmd_context *ctx); +int nl_get_phy(struct cmd_context *ctx); void nl_monitor_usage(void); diff --git a/netlink/nlsock.c b/netlink/nlsock.c index 0b873a3..5450c9b 100644 --- a/netlink/nlsock.c +++ b/netlink/nlsock.c @@ -298,6 +298,43 @@ int nlsock_prep_get_request(struct nl_socket *nlsk, unsigned int nlcmd, return 0; } +/** + * nlsock_prep_filtered_dump_request() - Initialize a filtered DUMP request + * @nlsk: netlink socket + * @nlcmd: netlink command + * @hdr_attrtype: netlink command header attribute + * @flags: netlink command header flags + * + * Prepare a DUMP request that may include the device index as a filtering + * attribute in the header. + * + * Return: 0 on success, or a negative number on error + */ +int nlsock_prep_filtered_dump_request(struct nl_socket *nlsk, + unsigned int nlcmd, uint16_t hdr_attrtype, + u32 flags) +{ + struct nl_context *nlctx = nlsk->nlctx; + const char *devname = nlctx->ctx->devname; + unsigned int nlm_flags; + int ret; + + nlctx->is_dump = true; + nlm_flags = NLM_F_REQUEST | NLM_F_ACK | NLM_F_DUMP; + + if (devname && !strcmp(devname, WILDCARD_DEVNAME)) + devname = NULL; + + ret = msg_init(nlctx, &nlsk->msgbuff, nlcmd, nlm_flags); + if (ret < 0) + return ret; + + if (ethnla_fill_header(&nlsk->msgbuff, hdr_attrtype, devname, flags)) + return -EMSGSIZE; + + return 0; +} + #ifndef TEST_ETHTOOL /** * nlsock_sendmsg() - send a netlink message to kernel diff --git a/netlink/nlsock.h b/netlink/nlsock.h index b015f86..6a72966 100644 --- a/netlink/nlsock.h +++ b/netlink/nlsock.h @@ -38,6 +38,8 @@ int nlsock_init(struct nl_context *nlctx, struct nl_socket **__nlsk, void nlsock_done(struct nl_socket *nlsk); int nlsock_prep_get_request(struct nl_socket *nlsk, unsigned int nlcmd, uint16_t hdr_attrtype, u32 flags); +int nlsock_prep_filtered_dump_request(struct nl_socket *nlsk, unsigned int nlcmd, + uint16_t hdr_attrtype, u32 flags); ssize_t nlsock_sendmsg(struct nl_socket *nlsk, struct nl_msg_buff *__msgbuff); int nlsock_send_get_request(struct nl_socket *nlsk, mnl_cb_t cb); int nlsock_process_reply(struct nl_socket *nlsk, mnl_cb_t reply_cb, void *data); diff --git a/netlink/phy.c b/netlink/phy.c new file mode 100644 index 0000000..7578191 --- /dev/null +++ b/netlink/phy.c @@ -0,0 +1,116 @@ +/* + * phy.c - List PHYs on an interface and their parameters + * + * Implementation of "ethtool --show-phys " + */ + +#include +#include +#include +#include + +#include "../internal.h" +#include "../common.h" +#include "netlink.h" + +/* PHY_GET / PHY_DUMP */ + +static const char * phy_upstream_type_to_str(uint8_t upstream_type) +{ + switch (upstream_type) { + case PHY_UPSTREAM_PHY: return "phy"; + case PHY_UPSTREAM_MAC: return "mac"; + default: return "Unknown"; + } +} + +int phy_reply_cb(const struct nlmsghdr *nlhdr, void *data) +{ + const struct nlattr *tb[ETHTOOL_A_PHY_MAX + 1] = {}; + struct nl_context *nlctx = data; + DECLARE_ATTR_TB_INFO(tb); + uint8_t upstream_type; + bool silent; + int err_ret; + int ret; + + silent = nlctx->is_dump || nlctx->is_monitor; + err_ret = silent ? MNL_CB_OK : MNL_CB_ERROR; + ret = mnl_attr_parse(nlhdr, GENL_HDRLEN, attr_cb, &tb_info); + if (ret < 0) + return err_ret; + nlctx->devname = get_dev_name(tb[ETHTOOL_A_PHY_HEADER]); + if (!dev_ok(nlctx)) + return err_ret; + + if (silent) + print_nl(); + + open_json_object(NULL); + + print_string(PRINT_ANY, "ifname", "PHY for %s:\n", nlctx->devname); + + show_u32("phy_index", "PHY index: ", tb[ETHTOOL_A_PHY_INDEX]); + + if (tb[ETHTOOL_A_PHY_DRVNAME]) + print_string(PRINT_ANY, "drvname", "Driver name: %s\n", + mnl_attr_get_str(tb[ETHTOOL_A_PHY_DRVNAME])); + + if (tb[ETHTOOL_A_PHY_NAME]) + print_string(PRINT_ANY, "name", "PHY device name: %s\n", + mnl_attr_get_str(tb[ETHTOOL_A_PHY_NAME])); + + if (tb[ETHTOOL_A_PHY_DOWNSTREAM_SFP_NAME]) + print_string(PRINT_ANY, "downstream_sfp_name", + "Downstream SFP bus name: %s\n", + mnl_attr_get_str(tb[ETHTOOL_A_PHY_DOWNSTREAM_SFP_NAME])); + + if (tb[ETHTOOL_A_PHY_UPSTREAM_TYPE]) { + upstream_type = mnl_attr_get_u8(tb[ETHTOOL_A_PHY_UPSTREAM_TYPE]); + print_string(PRINT_ANY, "upstream_type", "Upstream type: %s\n", + phy_upstream_type_to_str(upstream_type)); + } + + if (tb[ETHTOOL_A_PHY_UPSTREAM_INDEX]) + show_u32("upstream_index", "Upstream PHY index: ", + tb[ETHTOOL_A_PHY_UPSTREAM_INDEX]); + + if (tb[ETHTOOL_A_PHY_UPSTREAM_SFP_NAME]) + print_string(PRINT_ANY, "upstream_sfp_name", "Upstream SFP name: %s\n", + mnl_attr_get_str(tb[ETHTOOL_A_PHY_UPSTREAM_SFP_NAME])); + + if (!silent) + print_nl(); + + close_json_object(); + + return MNL_CB_OK; + + close_json_object(); + return err_ret; +} + +int nl_get_phy(struct cmd_context *ctx) +{ + struct nl_context *nlctx = ctx->nlctx; + struct nl_socket *nlsk = nlctx->ethnl_socket; + int ret; + + if (netlink_cmd_check(ctx, ETHTOOL_MSG_PHY_GET, true)) + return -EOPNOTSUPP; + if (ctx->argc > 0) { + fprintf(stderr, "ethtool: unexpected parameter '%s'\n", + *ctx->argp); + return 1; + } + + ret = nlsock_prep_filtered_dump_request(nlsk, ETHTOOL_MSG_PHY_GET, + ETHTOOL_A_PHY_HEADER, 0); + if (ret) + return ret; + + new_json_obj(ctx->json); + ret = nlsock_send_get_request(nlsk, phy_reply_cb); + delete_json_obj(); + return ret; +}