netdev - [PATCH ethtool v3 3/5] netlink: settings: Expose the number of lanes in use

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Date:   Wed, 10 Feb 2021 15:48:38 +0200
From:   Danielle Ratson <danieller@...dia.com>
To:     <netdev@...r.kernel.org>
CC:     <mkubecek@...e.cz>, <f.fainelli@...il.com>, <kuba@...nel.org>,
        <andrew@...n.ch>, <mlxsw@...dia.com>,
        Danielle Ratson <danieller@...dia.com>
Subject: [PATCH ethtool v3 3/5] netlink: settings: Expose the number of lanes in use

Currently, the user does not have the information regarding how many lanes
are used when the link is up.

After adding a possibility to advertise or force a specific number of
lanes this information becomes helpful.

Expose the number of lanes in use if the information is passed from
kernel.

Signed-off-by: Danielle Ratson <danieller@...dia.com>
---

Notes:
    v2:
        	* Remove possibility for printing unknown lanes, as now unknown
        	  lanes attribute doesn't pass to netlink.

 netlink/settings.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/netlink/settings.c b/netlink/settings.c
index c54fe56..e47a38f 100644
--- a/netlink/settings.c
+++ b/netlink/settings.c
@@ -473,6 +473,12 @@ int linkmodes_reply_cb(const struct nlmsghdr *nlhdr, void *data)
 		else
 			printf("\tSpeed: %uMb/s\n", val);
 	}
+	if (tb[ETHTOOL_A_LINKMODES_LANES]) {
+		uint32_t val = mnl_attr_get_u32(tb[ETHTOOL_A_LINKMODES_LANES]);
+
+		print_banner(nlctx);
+		printf("\tLanes: %u\n", val);
+	}
 	if (tb[ETHTOOL_A_LINKMODES_DUPLEX]) {
 		uint8_t val = mnl_attr_get_u8(tb[ETHTOOL_A_LINKMODES_DUPLEX]);
 
-- 
2.26.2