netdev - [PATCH ethtool v3 2/5] netlink: settings: Add netlink support for lanes parameter

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Date:   Wed, 10 Feb 2021 15:48:37 +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@...lanox.com>
Subject: [PATCH ethtool v3 2/5] netlink: settings: Add netlink support for lanes parameter

From: Danielle Ratson <danieller@...lanox.com>

Add support for "ethtool -s <dev> lanes N ..." for setting a specific
number of lanes.

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

Notes:
    v3:
    	* Remove a leftover.
    	* After adding a seperated patch for uapi headers, squash rest of
    	  the first patch.

 ethtool.c              | 1 +
 netlink/desc-ethtool.c | 1 +
 netlink/settings.c     | 7 +++++++
 3 files changed, 9 insertions(+)

diff --git a/ethtool.c b/ethtool.c
index fb90e9e..a8339c8 100644
--- a/ethtool.c
+++ b/ethtool.c
@@ -5620,6 +5620,7 @@ static const struct option args[] = {
 		.nlfunc	= nl_sset,
 		.help	= "Change generic options",
 		.xhelp	= "		[ speed %d ]\n"
+			  "		[ lanes %d ]\n"
 			  "		[ duplex half|full ]\n"
 			  "		[ port tp|aui|bnc|mii|fibre|da ]\n"
 			  "		[ mdix auto|on|off ]\n"
diff --git a/netlink/desc-ethtool.c b/netlink/desc-ethtool.c
index 96291b9..fe5d7ba 100644
--- a/netlink/desc-ethtool.c
+++ b/netlink/desc-ethtool.c
@@ -87,6 +87,7 @@ static const struct pretty_nla_desc __linkmodes_desc[] = {
 	NLATTR_DESC_U8(ETHTOOL_A_LINKMODES_DUPLEX),
 	NLATTR_DESC_U8(ETHTOOL_A_LINKMODES_MASTER_SLAVE_CFG),
 	NLATTR_DESC_U8(ETHTOOL_A_LINKMODES_MASTER_SLAVE_STATE),
+	NLATTR_DESC_U32(ETHTOOL_A_LINKMODES_LANES),
 };
 
 static const struct pretty_nla_desc __linkstate_desc[] = {
diff --git a/netlink/settings.c b/netlink/settings.c
index 90c28b1..c54fe56 100644
--- a/netlink/settings.c
+++ b/netlink/settings.c
@@ -1067,6 +1067,13 @@ static const struct param_parser sset_params[] = {
 		.handler	= nl_parse_direct_u32,
 		.min_argc	= 1,
 	},
+	{
+		.arg		= "lanes",
+		.group		= ETHTOOL_MSG_LINKMODES_SET,
+		.type		= ETHTOOL_A_LINKMODES_LANES,
+		.handler	= nl_parse_direct_u32,
+		.min_argc	= 1,
+	},
 	{
 		.arg		= "duplex",
 		.group		= ETHTOOL_MSG_LINKMODES_SET,
-- 
2.26.2