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Date:   Mon, 18 Feb 2019 19:22:34 +0100 (CET)
From:   Michal Kubecek <mkubecek@...e.cz>
To:     netdev@...r.kernel.org
Cc:     David Miller <davem@...emloft.net>, Andrew Lunn <andrew@...n.ch>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        Jiri Pirko <jiri@...nulli.us>, linux-kernel@...r.kernel.org
Subject: [RFC PATCH net-next v3 14/21] ethtool: provide link mode names as a
 string set

Add table of ethernet link mode names and make it available as a string set
to userspace GET_STRSET requests.

Signed-off-by: Michal Kubecek <mkubecek@...e.cz>
---
 include/uapi/linux/ethtool.h |  2 ++
 net/ethtool/netlink.c        | 58 ++++++++++++++++++++++++++++++++++++
 net/ethtool/netlink.h        |  1 +
 net/ethtool/strset.c         |  6 ++++
 4 files changed, 67 insertions(+)

diff --git a/include/uapi/linux/ethtool.h b/include/uapi/linux/ethtool.h
index 1b58637d3a4d..ba96a691bfd4 100644
--- a/include/uapi/linux/ethtool.h
+++ b/include/uapi/linux/ethtool.h
@@ -566,6 +566,7 @@ struct ethtool_pauseparam {
  * @ETH_SS_TSTAMP_SOF: timestamping flag names
  * @ETH_SS_TSTAMP_TX_TYPE: timestamping Tx type names
  * @ETH_SS_TSTAMP_RX_FILTER: timestamping Rx filter names
+ * @ETH_SS_LINK_MODES: link mode names
  */
 enum ethtool_stringset {
 	ETH_SS_TEST		= 0,
@@ -580,6 +581,7 @@ enum ethtool_stringset {
 	ETH_SS_TSTAMP_SOF,
 	ETH_SS_TSTAMP_TX_TYPE,
 	ETH_SS_TSTAMP_RX_FILTER,
+	ETH_SS_LINK_MODES,
 
 	ETH_SS_COUNT
 };
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index e27dec427414..1ff6696ad716 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -6,6 +6,61 @@
 
 u32 ethnl_bcast_seq;
 
+const char *const link_mode_names[] = {
+	[ETHTOOL_LINK_MODE_10baseT_Half_BIT]		= "10baseT/Half",
+	[ETHTOOL_LINK_MODE_10baseT_Full_BIT]		= "10baseT/Full",
+	[ETHTOOL_LINK_MODE_100baseT_Half_BIT]		= "100baseT/Half",
+	[ETHTOOL_LINK_MODE_100baseT_Full_BIT]		= "100baseT/Full",
+	[ETHTOOL_LINK_MODE_1000baseT_Half_BIT]		= "1000baseT/Half",
+	[ETHTOOL_LINK_MODE_1000baseT_Full_BIT]		= "1000baseT/Full",
+	[ETHTOOL_LINK_MODE_Autoneg_BIT]			= "Autoneg",
+	[ETHTOOL_LINK_MODE_TP_BIT]			= "TP",
+	[ETHTOOL_LINK_MODE_AUI_BIT]			= "AUI",
+	[ETHTOOL_LINK_MODE_MII_BIT]			= "MII",
+	[ETHTOOL_LINK_MODE_FIBRE_BIT]			= "FIBRE",
+	[ETHTOOL_LINK_MODE_BNC_BIT]			= "BNC",
+	[ETHTOOL_LINK_MODE_10000baseT_Full_BIT]		= "10000baseT/Full",
+	[ETHTOOL_LINK_MODE_Pause_BIT]			= "Pause",
+	[ETHTOOL_LINK_MODE_Asym_Pause_BIT]		= "Asym_Pause",
+	[ETHTOOL_LINK_MODE_2500baseX_Full_BIT]		= "2500baseX/Full",
+	[ETHTOOL_LINK_MODE_Backplane_BIT]		= "Backplane",
+	[ETHTOOL_LINK_MODE_1000baseKX_Full_BIT]		= "1000baseKX/Full",
+	[ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT]	= "10000baseKX4/Full",
+	[ETHTOOL_LINK_MODE_10000baseKR_Full_BIT]	= "10000baseKR/Full",
+	[ETHTOOL_LINK_MODE_10000baseR_FEC_BIT]		= "10000baseR/FEC",
+	[ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT]	= "20000baseMLD2/Full",
+	[ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT]	= "20000baseKR2/Full",
+	[ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT]	= "40000baseKR4/Full",
+	[ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT]	= "40000baseCR4/Full",
+	[ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT]	= "40000baseSR4/Full",
+	[ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT]	= "40000baseLR4/Full",
+	[ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT]	= "56000baseKR4/Full",
+	[ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT]	= "56000baseCR4/Full",
+	[ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT]	= "56000baseSR4/Full",
+	[ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT]	= "56000baseLR4/Full",
+	[ETHTOOL_LINK_MODE_25000baseCR_Full_BIT]	= "25000baseCR/Full",
+	[ETHTOOL_LINK_MODE_25000baseKR_Full_BIT]	= "25000baseKR/Full",
+	[ETHTOOL_LINK_MODE_25000baseSR_Full_BIT]	= "25000baseSR/Full",
+	[ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT]	= "50000baseCR2/Full",
+	[ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT]	= "50000baseKR2/Full",
+	[ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT]	= "100000baseKR4/Full",
+	[ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT]	= "100000baseSR4/Full",
+	[ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT]	= "100000baseCR4/Full",
+	[ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT]	= "100000baseLR4/ER4_Full",
+	[ETHTOOL_LINK_MODE_50000baseSR2_Full_BIT]	= "50000baseSR2/Full",
+	[ETHTOOL_LINK_MODE_1000baseX_Full_BIT]		= "1000baseX/Full",
+	[ETHTOOL_LINK_MODE_10000baseCR_Full_BIT]	= "10000baseCR/Full",
+	[ETHTOOL_LINK_MODE_10000baseSR_Full_BIT]	= "10000baseSR/Full",
+	[ETHTOOL_LINK_MODE_10000baseLR_Full_BIT]	= "10000baseLR/Full",
+	[ETHTOOL_LINK_MODE_10000baseLRM_Full_BIT]	= "10000baseLRM/Full",
+	[ETHTOOL_LINK_MODE_10000baseER_Full_BIT]	= "10000baseER/Full",
+	[ETHTOOL_LINK_MODE_2500baseT_Full_BIT]		= "2500baseT/Full",
+	[ETHTOOL_LINK_MODE_5000baseT_Full_BIT]		= "5000baseT/Full",
+	[ETHTOOL_LINK_MODE_FEC_NONE_BIT]		= "None",
+	[ETHTOOL_LINK_MODE_FEC_RS_BIT]			= "RS",
+	[ETHTOOL_LINK_MODE_FEC_BASER_BIT]		= "BASER",
+};
+
 static const struct nla_policy dev_policy[ETHA_DEV_MAX + 1] = {
 	[ETHA_DEV_UNSPEC]	= { .type = NLA_REJECT },
 	[ETHA_DEV_INDEX]	= { .type = NLA_U32 },
@@ -541,6 +596,9 @@ static int __init ethnl_init(void)
 {
 	int ret;
 
+	BUILD_BUG_ON(ARRAY_SIZE(link_mode_names) <
+		     __ETHTOOL_LINK_MODE_MASK_NBITS);
+
 	ret = genl_register_family(&ethtool_genl_family);
 	if (ret < 0)
 		panic("ethtool: could not register genetlink family\n");
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index 82a4c1f398d8..800ea57ab0de 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -23,6 +23,7 @@ extern struct genl_family ethtool_genl_family;
 extern const char *const so_timestamping_labels[];
 extern const char *const tstamp_tx_type_labels[];
 extern const char *const tstamp_rx_filter_labels[];
+extern const char *const link_mode_names[];
 
 struct net_device *ethnl_dev_get(struct genl_info *info, struct nlattr *nest);
 int ethnl_fill_dev(struct sk_buff *msg, struct net_device *dev, u16 attrtype);
diff --git a/net/ethtool/strset.c b/net/ethtool/strset.c
index 5c74498d9c72..dd87d7db8b61 100644
--- a/net/ethtool/strset.c
+++ b/net/ethtool/strset.c
@@ -85,6 +85,12 @@ static const struct strset_info info_template[] = {
 		.count		= __HWTSTAMP_FILTER_COUNT,
 		.data		= { .simple = tstamp_rx_filter_labels },
 	},
+	[ETH_SS_LINK_MODES] = {
+		.type		= ETH_SS_TYPE_SIMPLE,
+		.per_dev	= false,
+		.count		= __ETHTOOL_LINK_MODE_MASK_NBITS,
+		.data		= { .simple = link_mode_names },
+	},
 };
 
 struct strset_data {
-- 
2.20.1

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