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Message-Id: <1457065405-19049-12-git-send-email-ddecotig@gmail.com>
Date:	Thu,  3 Mar 2016 20:23:24 -0800
From:	David Decotigny <ddecotig@...il.com>
To:	netdev@...r.kernel.org
Cc:	Jeff Garzik <jgarzik@...ox.com>,
	Ben Hutchings <ben@...adent.org.uk>,
	David Miller <davem@...hat.com>,
	Vidya Sagar Ravipati <vidya@...ulusnetworks.com>,
	David Decotigny <decot@...glers.com>
Subject: [ethtool PATCH v2 11/12] ethtool.c: add support for ETHTOOL_xLINKSETTINGS ioctls

From: David Decotigny <decot@...glers.com>

More info with kernel SHA1: 8d3f2806f8fbd9b22 "Merge branch
'ethtool-ksettings'".


Signed-off-by: David Decotigny <decot@...glers.com>
---
 ethtool.c      | 682 +++++++++++++++++++++++++++++++++++++++++++--------------
 internal.h     |  66 ++++++
 test-cmdline.c |  12 +
 3 files changed, 601 insertions(+), 159 deletions(-)

diff --git a/ethtool.c b/ethtool.c
index 19f479c..e1acf09 100644
--- a/ethtool.c
+++ b/ethtool.c
@@ -47,42 +47,6 @@
 #define MAX_ADDR_LEN	32
 #endif
 
-#define ALL_ADVERTISED_MODES			\
-	(ADVERTISED_10baseT_Half |		\
-	 ADVERTISED_10baseT_Full |		\
-	 ADVERTISED_100baseT_Half |		\
-	 ADVERTISED_100baseT_Full |		\
-	 ADVERTISED_1000baseT_Half |		\
-	 ADVERTISED_1000baseT_Full |		\
-	 ADVERTISED_1000baseKX_Full|		\
-	 ADVERTISED_2500baseX_Full |		\
-	 ADVERTISED_10000baseT_Full |		\
-	 ADVERTISED_10000baseKX4_Full |		\
-	 ADVERTISED_10000baseKR_Full |		\
-	 ADVERTISED_10000baseR_FEC |		\
-	 ADVERTISED_20000baseMLD2_Full |	\
-	 ADVERTISED_20000baseKR2_Full |		\
-	 ADVERTISED_40000baseKR4_Full |		\
-	 ADVERTISED_40000baseCR4_Full |		\
-	 ADVERTISED_40000baseSR4_Full |		\
-	 ADVERTISED_40000baseLR4_Full |		\
-	 ADVERTISED_56000baseKR4_Full |		\
-	 ADVERTISED_56000baseCR4_Full |		\
-	 ADVERTISED_56000baseSR4_Full |		\
-	 ADVERTISED_56000baseLR4_Full)
-
-#define ALL_ADVERTISED_FLAGS			\
-	(ADVERTISED_Autoneg |			\
-	 ADVERTISED_TP |			\
-	 ADVERTISED_AUI |			\
-	 ADVERTISED_MII |			\
-	 ADVERTISED_FIBRE |			\
-	 ADVERTISED_BNC |			\
-	 ADVERTISED_Pause |			\
-	 ADVERTISED_Asym_Pause |		\
-	 ADVERTISED_Backplane |			\
-	 ALL_ADVERTISED_MODES)
-
 #ifndef HAVE_NETIF_MSG
 enum {
 	NETIF_MSG_DRV		= 0x0001,
@@ -293,6 +257,45 @@ static void get_mac_addr(char *src, unsigned char *dest)
 	}
 }
 
+static int parse_hex_u32_bitmap(const char *s,
+				unsigned int nbits, u32 *result)
+{
+	const unsigned nwords = DIV_ROUND_UP(nbits, 32);
+	size_t slen = strlen(s);
+	size_t i;
+
+	/* ignore optional '0x' prefix */
+	if ((slen > 2) && (
+		    (0 == memcmp(s, "0x", 2)
+		     || (0 == memcmp(s, "0X", 2))))) {
+		slen -= 2;
+		s += 2;
+	}
+
+	if (slen > 8*nwords)  /* up to 2 digits per byte */
+		return -1;
+
+	memset(result, 0, 4*nwords);
+	for (i = 0 ; i < slen ; ++i) {
+		const unsigned shift = (slen - 1 - i)*4;
+		u32 *dest = &result[shift / 32];
+		u32 nibble;
+
+		if ('a' <= s[i] && s[i] <= 'f')
+			nibble = 0xa + (s[i] - 'a');
+		else if ('A' <= s[i] && s[i] <= 'F')
+			nibble = 0xa + (s[i] - 'A');
+		else if ('0' <= s[i] && s[i] <= '9')
+			nibble = (s[i] - '0');
+		else
+			return -1;
+
+		*dest |= (nibble << (shift % 32));
+	}
+
+	return 0;
+}
+
 static void parse_generic_cmdline(struct cmd_context *ctx,
 				  int *changed,
 				  struct cmdline_info *info,
@@ -472,64 +475,157 @@ static int do_version(struct cmd_context *ctx)
 	return 0;
 }
 
-static void dump_link_caps(const char *prefix, const char *an_prefix, u32 mask,
-			   int link_mode_only);
+/* link mode routines */
+
+static __ETHTOOL_DECLARE_LINK_MODE_MASK(all_advertised_modes);
+static __ETHTOOL_DECLARE_LINK_MODE_MASK(all_advertised_flags);
 
-static void dump_supported(struct ethtool_cmd *ep)
+static void init_global_link_mode_masks()
 {
-	u32 mask = ep->supported;
+	static const enum ethtool_link_mode_bit_indices
+		all_advertised_modes_bits[] = {
+		ETHTOOL_LINK_MODE_10baseT_Half_BIT,
+		ETHTOOL_LINK_MODE_10baseT_Full_BIT,
+		ETHTOOL_LINK_MODE_100baseT_Half_BIT,
+		ETHTOOL_LINK_MODE_100baseT_Full_BIT,
+		ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
+		ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
+		ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
+		ETHTOOL_LINK_MODE_2500baseX_Full_BIT,
+		ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
+		ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
+		ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
+		ETHTOOL_LINK_MODE_10000baseR_FEC_BIT,
+		ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT,
+		ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT,
+		ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT,
+		ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT,
+		ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT,
+		ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT,
+		ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT,
+		ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT,
+		ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT,
+		ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT,
+	};
+	static const enum ethtool_link_mode_bit_indices
+		additional_advertised_flags_bits[] = {
+		ETHTOOL_LINK_MODE_Autoneg_BIT,
+		ETHTOOL_LINK_MODE_TP_BIT,
+		ETHTOOL_LINK_MODE_AUI_BIT,
+		ETHTOOL_LINK_MODE_MII_BIT,
+		ETHTOOL_LINK_MODE_FIBRE_BIT,
+		ETHTOOL_LINK_MODE_BNC_BIT,
+		ETHTOOL_LINK_MODE_Pause_BIT,
+		ETHTOOL_LINK_MODE_Asym_Pause_BIT,
+		ETHTOOL_LINK_MODE_Backplane_BIT,
+	};
+	unsigned i;
+
+	ethtool_link_mode_zero(all_advertised_modes);
+	ethtool_link_mode_zero(all_advertised_flags);
+	for (i = 0 ; i < ARRAY_SIZE(all_advertised_modes_bits) ; ++i) {
+		ethtool_link_mode_set_bit(all_advertised_modes_bits[i],
+					  all_advertised_modes);
+		ethtool_link_mode_set_bit(all_advertised_modes_bits[i],
+					  all_advertised_flags);
+	}
+
+	for (i = 0 ; i < ARRAY_SIZE(additional_advertised_flags_bits) ; ++i) {
+		ethtool_link_mode_set_bit(
+			additional_advertised_flags_bits[i],
+			all_advertised_flags);
+	}
+}
+
+static void dump_link_caps(const char *prefix, const char *an_prefix,
+			   const u32 *mask, int link_mode_only);
 
+static void dump_supported(const struct ethtool_link_usettings *link_usettings)
+{
 	fprintf(stdout, "	Supported ports: [ ");
-	if (mask & SUPPORTED_TP)
+	if (ethtool_link_mode_test_bit(
+		    ETHTOOL_LINK_MODE_TP_BIT,
+		    link_usettings->link_modes.supported))
 		fprintf(stdout, "TP ");
-	if (mask & SUPPORTED_AUI)
+	if (ethtool_link_mode_test_bit(
+		    ETHTOOL_LINK_MODE_AUI_BIT,
+		    link_usettings->link_modes.supported))
 		fprintf(stdout, "AUI ");
-	if (mask & SUPPORTED_BNC)
+	if (ethtool_link_mode_test_bit(
+		    ETHTOOL_LINK_MODE_BNC_BIT,
+		    link_usettings->link_modes.supported))
 		fprintf(stdout, "BNC ");
-	if (mask & SUPPORTED_MII)
+	if (ethtool_link_mode_test_bit(
+		    ETHTOOL_LINK_MODE_MII_BIT,
+		    link_usettings->link_modes.supported))
 		fprintf(stdout, "MII ");
-	if (mask & SUPPORTED_FIBRE)
+	if (ethtool_link_mode_test_bit(
+		    ETHTOOL_LINK_MODE_FIBRE_BIT,
+		    link_usettings->link_modes.supported))
 		fprintf(stdout, "FIBRE ");
-	if (mask & SUPPORTED_Backplane)
+	if (ethtool_link_mode_test_bit(
+		    ETHTOOL_LINK_MODE_Backplane_BIT,
+		    link_usettings->link_modes.supported))
 		fprintf(stdout, "Backplane ");
 	fprintf(stdout, "]\n");
 
-	dump_link_caps("Supported", "Supports", mask, 0);
+	dump_link_caps("Supported", "Supports",
+		       link_usettings->link_modes.supported, 0);
 }
 
 /* Print link capability flags (supported, advertised or lp_advertised).
  * Assumes that the corresponding SUPPORTED and ADVERTISED flags are equal.
  */
-static void
-dump_link_caps(const char *prefix, const char *an_prefix, u32 mask,
-	       int link_mode_only)
+static void dump_link_caps(const char *prefix, const char *an_prefix,
+			   const u32 *mask, int link_mode_only)
 {
 	static const struct {
 		int same_line; /* print on same line as previous */
-		u32 value;
+		unsigned bit_indice;
 		const char *name;
 	} mode_defs[] = {
-		{ 0, ADVERTISED_10baseT_Half,       "10baseT/Half" },
-		{ 1, ADVERTISED_10baseT_Full,       "10baseT/Full" },
-		{ 0, ADVERTISED_100baseT_Half,      "100baseT/Half" },
-		{ 1, ADVERTISED_100baseT_Full,      "100baseT/Full" },
-		{ 0, ADVERTISED_1000baseT_Half,     "1000baseT/Half" },
-		{ 1, ADVERTISED_1000baseT_Full,     "1000baseT/Full" },
-		{ 0, ADVERTISED_1000baseKX_Full,    "1000baseKX/Full" },
-		{ 0, ADVERTISED_2500baseX_Full,     "2500baseX/Full" },
-		{ 0, ADVERTISED_10000baseT_Full,    "10000baseT/Full" },
-		{ 0, ADVERTISED_10000baseKX4_Full,  "10000baseKX4/Full" },
-		{ 0, ADVERTISED_10000baseKR_Full,   "10000baseKR/Full" },
-		{ 0, ADVERTISED_20000baseMLD2_Full, "20000baseMLD2/Full" },
-		{ 0, ADVERTISED_20000baseKR2_Full,  "20000baseKR2/Full" },
-		{ 0, ADVERTISED_40000baseKR4_Full,  "40000baseKR4/Full" },
-		{ 0, ADVERTISED_40000baseCR4_Full,  "40000baseCR4/Full" },
-		{ 0, ADVERTISED_40000baseSR4_Full,  "40000baseSR4/Full" },
-		{ 0, ADVERTISED_40000baseLR4_Full,  "40000baseLR4/Full" },
-		{ 0, ADVERTISED_56000baseKR4_Full,  "56000baseKR4/Full" },
-		{ 0, ADVERTISED_56000baseCR4_Full,  "56000baseCR4/Full" },
-		{ 0, ADVERTISED_56000baseSR4_Full,  "56000baseSR4/Full" },
-		{ 0, ADVERTISED_56000baseLR4_Full,  "56000baseLR4/Full" },
+		{ 0, ETHTOOL_LINK_MODE_10baseT_Half_BIT,
+		  "10baseT/Half" },
+		{ 1, ETHTOOL_LINK_MODE_10baseT_Full_BIT,
+		  "10baseT/Full" },
+		{ 0, ETHTOOL_LINK_MODE_100baseT_Half_BIT,
+		  "100baseT/Half" },
+		{ 1, ETHTOOL_LINK_MODE_100baseT_Full_BIT,
+		  "100baseT/Full" },
+		{ 0, ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
+		  "1000baseT/Half" },
+		{ 1, ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
+		  "1000baseT/Full" },
+		{ 0, ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
+		  "1000baseKX/Full" },
+		{ 0, ETHTOOL_LINK_MODE_2500baseX_Full_BIT,
+		  "2500baseX/Full" },
+		{ 0, ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
+		  "10000baseT/Full" },
+		{ 0, ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
+		  "10000baseKX4/Full" },
+		{ 0, ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
+		  "10000baseKR/Full" },
+		{ 0, ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT,
+		  "20000baseMLD2/Full" },
+		{ 0, ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT,
+		  "20000baseKR2/Full" },
+		{ 0, ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT,
+		  "40000baseKR4/Full" },
+		{ 0, ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT,
+		  "40000baseCR4/Full" },
+		{ 0, ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT,
+		  "40000baseSR4/Full" },
+		{ 0, ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT,
+		  "40000baseLR4/Full" },
+		{ 0, ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT,
+		  "56000baseKR4/Full" },
+		{ 0, ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT,
+		  "56000baseCR4/Full" },
+		{ 0, ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT,
+		  "56000baseSR4/Full" },
+		{ 0, ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT,
+		  "56000baseLR4/Full" },
 	};
 	int indent;
 	int did1, new_line_pend, i;
@@ -546,7 +642,8 @@ dump_link_caps(const char *prefix, const char *an_prefix, u32 mask,
 	for (i = 0; i < ARRAY_SIZE(mode_defs); i++) {
 		if (did1 && !mode_defs[i].same_line)
 			new_line_pend = 1;
-		if (mask & mode_defs[i].value) {
+		if (ethtool_link_mode_test_bit(mode_defs[i].bit_indice,
+					       mask)) {
 			if (new_line_pend) {
 				fprintf(stdout, "\n");
 				fprintf(stdout, "	%*s", indent, "");
@@ -557,51 +654,57 @@ dump_link_caps(const char *prefix, const char *an_prefix, u32 mask,
 		}
 	}
 	if (did1 == 0)
-		 fprintf(stdout, "Not reported");
+		fprintf(stdout, "Not reported");
 	fprintf(stdout, "\n");
 
 	if (!link_mode_only) {
 		fprintf(stdout, "	%s pause frame use: ", prefix);
-		if (mask & ADVERTISED_Pause) {
+		if (ethtool_link_mode_test_bit(
+			    ETHTOOL_LINK_MODE_Pause_BIT, mask)) {
 			fprintf(stdout, "Symmetric");
-			if (mask & ADVERTISED_Asym_Pause)
+			if (ethtool_link_mode_test_bit(
+				    ETHTOOL_LINK_MODE_Asym_Pause_BIT, mask))
 				fprintf(stdout, " Receive-only");
 			fprintf(stdout, "\n");
 		} else {
-			if (mask & ADVERTISED_Asym_Pause)
+			if (ethtool_link_mode_test_bit(
+				    ETHTOOL_LINK_MODE_Asym_Pause_BIT, mask))
 				fprintf(stdout, "Transmit-only\n");
 			else
 				fprintf(stdout, "No\n");
 		}
 
 		fprintf(stdout, "	%s auto-negotiation: ", an_prefix);
-		if (mask & ADVERTISED_Autoneg)
+		if (ethtool_link_mode_test_bit(
+			    ETHTOOL_LINK_MODE_Autoneg_BIT, mask))
 			fprintf(stdout, "Yes\n");
 		else
 			fprintf(stdout, "No\n");
 	}
 }
 
-static int dump_ecmd(struct ethtool_cmd *ep)
+static int
+dump_link_usettings(const struct ethtool_link_usettings *link_usettings)
 {
-	u32 speed;
-
-	dump_supported(ep);
-	dump_link_caps("Advertised", "Advertised", ep->advertising, 0);
-	if (ep->lp_advertising)
+	dump_supported(link_usettings);
+	dump_link_caps("Advertised", "Advertised",
+		       link_usettings->link_modes.advertising, 0);
+	if (!ethtool_link_mode_is_empty(
+		    link_usettings->link_modes.lp_advertising))
 		dump_link_caps("Link partner advertised",
-			       "Link partner advertised", ep->lp_advertising,
-			       0);
+			       "Link partner advertised",
+			       link_usettings->link_modes.lp_advertising, 0);
 
 	fprintf(stdout, "	Speed: ");
-	speed = ethtool_cmd_speed(ep);
-	if (speed == 0 || speed == (u16)(-1) || speed == (u32)(-1))
+	if (link_usettings->base.speed == 0
+	    || link_usettings->base.speed == (u16)(-1)
+	    || link_usettings->base.speed == (u32)(-1))
 		fprintf(stdout, "Unknown!\n");
 	else
-		fprintf(stdout, "%uMb/s\n", speed);
+		fprintf(stdout, "%uMb/s\n", link_usettings->base.speed);
 
 	fprintf(stdout, "	Duplex: ");
-	switch (ep->duplex) {
+	switch (link_usettings->base.duplex) {
 	case DUPLEX_HALF:
 		fprintf(stdout, "Half\n");
 		break;
@@ -609,12 +712,12 @@ static int dump_ecmd(struct ethtool_cmd *ep)
 		fprintf(stdout, "Full\n");
 		break;
 	default:
-		fprintf(stdout, "Unknown! (%i)\n", ep->duplex);
+		fprintf(stdout, "Unknown! (%i)\n", link_usettings->base.duplex);
 		break;
 	};
 
 	fprintf(stdout, "	Port: ");
-	switch (ep->port) {
+	switch (link_usettings->base.port) {
 	case PORT_TP:
 		fprintf(stdout, "Twisted Pair\n");
 		break;
@@ -640,13 +743,13 @@ static int dump_ecmd(struct ethtool_cmd *ep)
 		fprintf(stdout, "Other\n");
 		break;
 	default:
-		fprintf(stdout, "Unknown! (%i)\n", ep->port);
+		fprintf(stdout, "Unknown! (%i)\n", link_usettings->base.port);
 		break;
 	};
 
-	fprintf(stdout, "	PHYAD: %d\n", ep->phy_address);
+	fprintf(stdout, "	PHYAD: %d\n", link_usettings->base.phy_address);
 	fprintf(stdout, "	Transceiver: ");
-	switch (ep->transceiver) {
+	switch (link_usettings->deprecated.transceiver) {
 	case XCVR_INTERNAL:
 		fprintf(stdout, "internal\n");
 		break;
@@ -659,17 +762,17 @@ static int dump_ecmd(struct ethtool_cmd *ep)
 	};
 
 	fprintf(stdout, "	Auto-negotiation: %s\n",
-		(ep->autoneg == AUTONEG_DISABLE) ?
+		(link_usettings->base.autoneg == AUTONEG_DISABLE) ?
 		"off" : "on");
 
-	if (ep->port == PORT_TP) {
+	if (link_usettings->base.port == PORT_TP) {
 		fprintf(stdout, "	MDI-X: ");
-		if (ep->eth_tp_mdix_ctrl == ETH_TP_MDI) {
+		if (link_usettings->base.eth_tp_mdix_ctrl == ETH_TP_MDI) {
 			fprintf(stdout, "off (forced)\n");
-		} else if (ep->eth_tp_mdix_ctrl == ETH_TP_MDI_X) {
+		} else if (link_usettings->base.eth_tp_mdix_ctrl == ETH_TP_MDI_X) {
 			fprintf(stdout, "on (forced)\n");
 		} else {
-			switch (ep->eth_tp_mdix) {
+			switch (link_usettings->base.eth_tp_mdix) {
 			case ETH_TP_MDI:
 				fprintf(stdout, "off");
 				break;
@@ -680,7 +783,8 @@ static int dump_ecmd(struct ethtool_cmd *ep)
 				fprintf(stdout, "Unknown");
 				break;
 			}
-			if (ep->eth_tp_mdix_ctrl == ETH_TP_MDI_AUTO)
+			if (link_usettings->base.eth_tp_mdix_ctrl
+			    == ETH_TP_MDI_AUTO)
 				fprintf(stdout, " (auto)");
 			fprintf(stdout, "\n");
 		}
@@ -1368,6 +1472,7 @@ static int dump_rxfhash(int fhash, u64 val)
 
 static void dump_eeecmd(struct ethtool_eee *ep)
 {
+	__ETHTOOL_DECLARE_LINK_MODE_MASK(link_mode);
 
 	fprintf(stdout, "	EEE status: ");
 	if (!ep->supported) {
@@ -1389,9 +1494,16 @@ static void dump_eeecmd(struct ethtool_eee *ep)
 	else
 		fprintf(stdout, " disabled\n");
 
-	dump_link_caps("Supported EEE", "", ep->supported, 1);
-	dump_link_caps("Advertised EEE", "", ep->advertised, 1);
-	dump_link_caps("Link partner advertised EEE", "", ep->lp_advertised, 1);
+	ethtool_link_mode_zero(link_mode);
+
+	link_mode[0] = ep->supported;
+	dump_link_caps("Supported EEE", "", link_mode, 1);
+
+	link_mode[0] = ep->advertised;
+	dump_link_caps("Advertised EEE", "", link_mode, 1);
+
+	link_mode[0] = ep->lp_advertised;
+	dump_link_caps("Link partner advertised EEE", "", link_mode, 1);
 }
 
 #define N_SOTS 7
@@ -2247,10 +2359,219 @@ static int do_sfeatures(struct cmd_context *ctx)
 	return 0;
 }
 
-static int do_gset(struct cmd_context *ctx)
+static struct ethtool_link_usettings *
+__do_ioctl_glinksettings(struct cmd_context * ctx)
+{
+	int err;
+	struct {
+		struct ethtool_link_settings req;
+		__u32 link_mode_data[3*__ETHTOOL_LINK_MODE_MASK_MAX_KERNEL_NU32];
+	} ecmd;
+	struct ethtool_link_usettings *link_usettings;
+	unsigned u32_offs;
+
+	/* handshake with kernel to determine number of words for link
+	 * mode bitmaps */
+	memset(&ecmd, 0, sizeof(ecmd));
+	ecmd.req.cmd = ETHTOOL_GLINKSETTINGS;
+	err = send_ioctl(ctx, &ecmd);
+	if (err < 0)
+		return NULL;
+
+	if (ecmd.req.link_mode_masks_nwords >= 0 || ecmd.req.cmd)
+		return NULL;
+
+	/* got the real ecmd.req.link_mode_masks_nwords,
+	   now send the real request */
+	ecmd.req.cmd = ETHTOOL_GLINKSETTINGS;
+	ecmd.req.link_mode_masks_nwords = -ecmd.req.link_mode_masks_nwords;
+	err = send_ioctl(ctx, &ecmd);
+	if (err < 0)
+		return NULL;
+
+	if (ecmd.req.link_mode_masks_nwords <= 0 || !ecmd.req.cmd)
+		return NULL;
+
+	/* Convert to usettings struct */
+	link_usettings = malloc(sizeof(*link_usettings));
+	if (NULL == link_usettings)
+		return NULL;
+
+	memset(link_usettings, 0, sizeof(*link_usettings));
+	/* keep transceiver 0 */
+	memcpy(&link_usettings->base, &ecmd.req, sizeof(link_usettings->base));
+	/* remember that ETHTOOL_GLINKSETTINGS was used */
+	link_usettings->base.cmd = ETHTOOL_GLINKSETTINGS;
+
+	/* copy link mode bitmaps */
+	u32_offs = 0;
+	memcpy(link_usettings->link_modes.supported,
+	       &ecmd.link_mode_data[u32_offs],
+	       4*ecmd.req.link_mode_masks_nwords);
+
+	u32_offs += ecmd.req.link_mode_masks_nwords;
+	memcpy(link_usettings->link_modes.advertising,
+	       &ecmd.link_mode_data[u32_offs],
+	       4*ecmd.req.link_mode_masks_nwords);
+
+	u32_offs += ecmd.req.link_mode_masks_nwords;
+	memcpy(link_usettings->link_modes.lp_advertising,
+	       &ecmd.link_mode_data[u32_offs],
+	       4*ecmd.req.link_mode_masks_nwords);
+
+	return link_usettings;
+}
+
+static int
+__do_ioctl_slinksettings(struct cmd_context * ctx,
+			 const struct ethtool_link_usettings *link_usettings)
+{
+	struct {
+		struct ethtool_link_settings req;
+		__u32 link_mode_data[3*__ETHTOOL_LINK_MODE_MASK_MAX_KERNEL_NU32];
+	} ecmd;
+	unsigned u32_offs;
+
+	/* refuse to send ETHTOOL_SLINKSETTINGS ioctl if
+	 * link_usettings was retrieved with ETHTOOL_GSET */
+	if (ETHTOOL_GLINKSETTINGS != link_usettings->base.cmd)
+		return -1;
+
+	/* refuse to send ETHTOOL_SLINKSETTINGS ioctl if deprecated fields
+	 * were set */
+	if (link_usettings->deprecated.transceiver)
+		return -1;
+
+	if (link_usettings->base.link_mode_masks_nwords <= 0)
+		return -1;
+
+	memcpy(&ecmd.req, &link_usettings->base, sizeof(ecmd.req));
+	ecmd.req.cmd = ETHTOOL_SLINKSETTINGS;
+
+	/* copy link mode bitmaps */
+	u32_offs = 0;
+	memcpy(&ecmd.link_mode_data[u32_offs],
+	       link_usettings->link_modes.supported,
+	       4*ecmd.req.link_mode_masks_nwords);
+
+	u32_offs += ecmd.req.link_mode_masks_nwords;
+	memcpy(&ecmd.link_mode_data[u32_offs],
+	       link_usettings->link_modes.advertising,
+	       4*ecmd.req.link_mode_masks_nwords);
+
+	u32_offs += ecmd.req.link_mode_masks_nwords;
+	memcpy(&ecmd.link_mode_data[u32_offs],
+	       link_usettings->link_modes.lp_advertising,
+	       4*ecmd.req.link_mode_masks_nwords);
+
+	return send_ioctl(ctx, &ecmd);
+}
+
+static struct ethtool_link_usettings *
+__do_ioctl_gset(struct cmd_context * ctx)
 {
 	int err;
 	struct ethtool_cmd ecmd;
+	struct ethtool_link_usettings *link_usettings;
+
+	memset(&ecmd, 0, sizeof(ecmd));
+	ecmd.cmd = ETHTOOL_GSET;
+	err = send_ioctl(ctx, &ecmd);
+	if (err < 0)
+		return NULL;
+
+	link_usettings = malloc(sizeof(*link_usettings));
+	if (NULL == link_usettings)
+		return NULL;
+
+	memset(link_usettings, 0, sizeof(*link_usettings));
+	/* remember that ETHTOOL_GSET was used */
+	link_usettings->base.cmd = ETHTOOL_GSET;
+
+	link_usettings->base.link_mode_masks_nwords = 1;
+	link_usettings->link_modes.supported[0] = ecmd.supported;
+	link_usettings->link_modes.advertising[0] = ecmd.advertising;
+	link_usettings->link_modes.lp_advertising[0] = ecmd.lp_advertising;
+	link_usettings->base.speed = ethtool_cmd_speed(&ecmd);
+	link_usettings->base.duplex = ecmd.duplex;
+	link_usettings->base.port = ecmd.port;
+	link_usettings->base.phy_address = ecmd.phy_address;
+	link_usettings->deprecated.transceiver = ecmd.transceiver;
+	link_usettings->base.autoneg = ecmd.autoneg;
+	link_usettings->base.mdio_support = ecmd.mdio_support;
+	/* ignored (fully deprecated): maxrxpkt, maxtxpkt */
+	link_usettings->base.eth_tp_mdix = ecmd.eth_tp_mdix;
+	link_usettings->base.eth_tp_mdix_ctrl = ecmd.eth_tp_mdix_ctrl;
+	link_usettings->deprecated.transceiver = ecmd.transceiver;
+
+	return link_usettings;
+}
+
+static int ethtool_link_mode_is_backward_compatible(
+	const u32 *mask)
+{
+	unsigned int i;
+
+	for (i = 1 ; i < __ETHTOOL_LINK_MODE_MASK_MAX_KERNEL_NU32 ; ++i)
+		if (mask[i])
+			return FALSE;
+
+	return TRUE;
+}
+
+static int
+__do_ioctl_sset(struct cmd_context *ctx,
+		const struct ethtool_link_usettings *link_usettings)
+{
+	struct ethtool_cmd ecmd;
+
+	/* refuse to send ETHTOOL_SSET ioctl if link_usettings was
+	 * retrived with ETHTOOL_GLINKSETTINGS */
+	if (ETHTOOL_GSET != link_usettings->base.cmd)
+		return -1;
+
+	if (link_usettings->base.link_mode_masks_nwords <= 0)
+		return -1;
+
+	/* refuse to sset if any bit > 31 is set */
+	if (!ethtool_link_mode_is_backward_compatible(
+		    link_usettings->link_modes.supported))
+		return -1;
+	if (!ethtool_link_mode_is_backward_compatible(
+		    link_usettings->link_modes.advertising))
+		return -1;
+	if (!ethtool_link_mode_is_backward_compatible(
+		    link_usettings->link_modes.lp_advertising))
+		return -1;
+
+	memset(&ecmd, 0, sizeof(ecmd));
+	ecmd.cmd = ETHTOOL_SSET;
+
+	ecmd.supported = link_usettings->link_modes.supported[0];
+	ecmd.advertising = link_usettings->link_modes.advertising[0];
+	ecmd.lp_advertising = link_usettings->link_modes.lp_advertising[0];
+	ethtool_cmd_speed_set(&ecmd, link_usettings->base.speed);
+	ecmd.duplex = link_usettings->base.duplex;
+	ecmd.port = link_usettings->base.port;
+	ecmd.phy_address = link_usettings->base.phy_address;
+	ecmd.transceiver = link_usettings->deprecated.transceiver;
+	ecmd.autoneg = link_usettings->base.autoneg;
+	ecmd.mdio_support = link_usettings->base.mdio_support;
+	/* ignored (fully deprecated): maxrxpkt, maxtxpkt */
+	ecmd.eth_tp_mdix = link_usettings->base.eth_tp_mdix;
+	ecmd.eth_tp_mdix_ctrl = link_usettings->base.eth_tp_mdix_ctrl;
+	return send_ioctl(ctx, &ecmd);
+}
+
+static void
+__free_link_usettings(struct ethtool_link_usettings *link_usettings) {
+	free(link_usettings);
+}
+
+static int do_gset(struct cmd_context *ctx)
+{
+	int err;
+	struct ethtool_link_usettings *link_usettings;
 	struct ethtool_wolinfo wolinfo;
 	struct ethtool_value edata;
 	int allfail = 1;
@@ -2260,10 +2581,12 @@ static int do_gset(struct cmd_context *ctx)
 
 	fprintf(stdout, "Settings for %s:\n", ctx->devname);
 
-	ecmd.cmd = ETHTOOL_GSET;
-	err = send_ioctl(ctx, &ecmd);
-	if (err == 0) {
-		err = dump_ecmd(&ecmd);
+	link_usettings = __do_ioctl_glinksettings(ctx);
+	if (NULL == link_usettings)
+		link_usettings = __do_ioctl_gset(ctx);
+	if (NULL != link_usettings) {
+		err = dump_link_usettings(link_usettings);
+		__free_link_usettings(link_usettings);
 		if (err)
 			return err;
 		allfail = 0;
@@ -2322,8 +2645,10 @@ static int do_sset(struct cmd_context *ctx)
 	int autoneg_wanted = -1;
 	int phyad_wanted = -1;
 	int xcvr_wanted = -1;
-	int full_advertising_wanted = -1;
-	int advertising_wanted = -1;
+	u32 *full_advertising_wanted = NULL;
+	u32 *advertising_wanted = NULL;
+	__ETHTOOL_DECLARE_LINK_MODE_MASK(_mask_full_advertising_wanted);
+	__ETHTOOL_DECLARE_LINK_MODE_MASK(_mask_advertising_wanted);
 	int gset_changed = 0; /* did anything in GSET change? */
 	u32 wol_wanted = 0;
 	int wol_change = 0;
@@ -2337,7 +2662,7 @@ static int do_sset(struct cmd_context *ctx)
 	int argc = ctx->argc;
 	char **argp = ctx->argp;
 	int i;
-	int err;
+	int err = 0;
 
 	for (i = 0; i < ARRAY_SIZE(flags_msglvl); i++)
 		flag_to_cmdline_info(flags_msglvl[i].name,
@@ -2411,7 +2736,12 @@ static int do_sset(struct cmd_context *ctx)
 			i += 1;
 			if (i >= argc)
 				exit_bad_args();
-			full_advertising_wanted = get_int(argp[i], 16);
+			if (0 != parse_hex_u32_bitmap(
+				    argp[i],
+				    __ETHTOOL_LINK_MODE_MASK_MAX_KERNEL_NBITS,
+				    _mask_full_advertising_wanted))
+				exit_bad_args();
+			full_advertising_wanted = _mask_full_advertising_wanted;
 		} else if (!strcmp(argp[i], "phyad")) {
 			gset_changed = 1;
 			i += 1;
@@ -2468,75 +2798,88 @@ static int do_sset(struct cmd_context *ctx)
 		}
 	}
 
-	if (full_advertising_wanted < 0) {
+	if (NULL == full_advertising_wanted) {
 		/* User didn't supply a full advertisement bitfield:
 		 * construct one from the specified speed and duplex.
 		 */
+		int adv_bit = -1;
+
 		if (speed_wanted == SPEED_10 && duplex_wanted == DUPLEX_HALF)
-			advertising_wanted = ADVERTISED_10baseT_Half;
+			adv_bit = ETHTOOL_LINK_MODE_10baseT_Half_BIT;
 		else if (speed_wanted == SPEED_10 &&
 			 duplex_wanted == DUPLEX_FULL)
-			advertising_wanted = ADVERTISED_10baseT_Full;
+			adv_bit = ETHTOOL_LINK_MODE_10baseT_Full_BIT;
 		else if (speed_wanted == SPEED_100 &&
 			 duplex_wanted == DUPLEX_HALF)
-			advertising_wanted = ADVERTISED_100baseT_Half;
+			adv_bit = ETHTOOL_LINK_MODE_100baseT_Half_BIT;
 		else if (speed_wanted == SPEED_100 &&
 			 duplex_wanted == DUPLEX_FULL)
-			advertising_wanted = ADVERTISED_100baseT_Full;
+			adv_bit = ETHTOOL_LINK_MODE_100baseT_Full_BIT;
 		else if (speed_wanted == SPEED_1000 &&
 			 duplex_wanted == DUPLEX_HALF)
-			advertising_wanted = ADVERTISED_1000baseT_Half;
+			adv_bit = ETHTOOL_LINK_MODE_1000baseT_Half_BIT;
 		else if (speed_wanted == SPEED_1000 &&
 			 duplex_wanted == DUPLEX_FULL)
-			advertising_wanted = ADVERTISED_1000baseT_Full;
+			adv_bit = ETHTOOL_LINK_MODE_1000baseT_Full_BIT;
 		else if (speed_wanted == SPEED_2500 &&
 			 duplex_wanted == DUPLEX_FULL)
-			advertising_wanted = ADVERTISED_2500baseX_Full;
+			adv_bit = ETHTOOL_LINK_MODE_2500baseX_Full_BIT;
 		else if (speed_wanted == SPEED_10000 &&
 			 duplex_wanted == DUPLEX_FULL)
-			advertising_wanted = ADVERTISED_10000baseT_Full;
-		else
-			/* auto negotiate without forcing,
-			 * all supported speed will be assigned below
-			 */
-			advertising_wanted = 0;
+			adv_bit = ETHTOOL_LINK_MODE_10000baseT_Full_BIT;
+
+		if (adv_bit >= 0) {
+			advertising_wanted = _mask_advertising_wanted;
+			ethtool_link_mode_set_bit(
+				adv_bit, advertising_wanted);
+		}
+		/* otherwise: auto negotiate without forcing,
+		 * all supported speed will be assigned below
+		 */
 	}
 
 	if (gset_changed) {
-		struct ethtool_cmd ecmd;
+		struct ethtool_link_usettings *link_usettings;
 
-		ecmd.cmd = ETHTOOL_GSET;
-		err = send_ioctl(ctx, &ecmd);
-		if (err < 0) {
+		link_usettings = __do_ioctl_glinksettings(ctx);
+		if (NULL == link_usettings)
+			link_usettings = __do_ioctl_gset(ctx);
+		if (NULL == link_usettings) {
 			perror("Cannot get current device settings");
+			err = -1;
 		} else {
 			/* Change everything the user specified. */
 			if (speed_wanted != -1)
-				ethtool_cmd_speed_set(&ecmd, speed_wanted);
+				link_usettings->base.speed = speed_wanted;
 			if (duplex_wanted != -1)
-				ecmd.duplex = duplex_wanted;
+				link_usettings->base.duplex = duplex_wanted;
 			if (port_wanted != -1)
-				ecmd.port = port_wanted;
+				link_usettings->base.port = port_wanted;
 			if (mdix_wanted != -1) {
 				/* check driver supports MDI-X */
-				if (ecmd.eth_tp_mdix_ctrl != ETH_TP_MDI_INVALID)
-					ecmd.eth_tp_mdix_ctrl = mdix_wanted;
+				if (link_usettings->base.eth_tp_mdix_ctrl
+				    != ETH_TP_MDI_INVALID)
+					link_usettings->base.eth_tp_mdix_ctrl
+						= mdix_wanted;
 				else
-					fprintf(stderr, "setting MDI not supported\n");
+					fprintf(stderr,
+						"setting MDI not supported\n");
 			}
 			if (autoneg_wanted != -1)
-				ecmd.autoneg = autoneg_wanted;
+				link_usettings->base.autoneg = autoneg_wanted;
 			if (phyad_wanted != -1)
-				ecmd.phy_address = phyad_wanted;
+				link_usettings->base.phy_address = phyad_wanted;
 			if (xcvr_wanted != -1)
-				ecmd.transceiver = xcvr_wanted;
+				link_usettings->deprecated.transceiver
+					= xcvr_wanted;
 			/* XXX If the user specified speed or duplex
 			 * then we should mask the advertised modes
 			 * accordingly.  For now, warn that we aren't
 			 * doing that.
 			 */
 			if ((speed_wanted != -1 || duplex_wanted != -1) &&
-			    ecmd.autoneg && advertising_wanted == 0) {
+			    link_usettings->base.autoneg &&
+			    NULL == advertising_wanted) {
 				fprintf(stderr, "Cannot advertise");
 				if (speed_wanted >= 0)
 					fprintf(stderr, " speed %d",
@@ -2548,37 +2891,56 @@ static int do_sset(struct cmd_context *ctx)
 				fprintf(stderr,	"\n");
 			}
 			if (autoneg_wanted == AUTONEG_ENABLE &&
-			    advertising_wanted == 0) {
+			    NULL == advertising_wanted) {
+				unsigned int i;
+
 				/* Auto negotiation enabled, but with
 				 * unspecified speed and duplex: enable all
 				 * supported speeds and duplexes.
 				 */
-				ecmd.advertising =
-					(ecmd.advertising &
-					 ~ALL_ADVERTISED_MODES) |
-					(ALL_ADVERTISED_MODES & ecmd.supported);
+				ethtool_link_mode_for_each_u32(i)
+				{
+					u32 sup = link_usettings->link_modes.supported[i];
+					u32 *adv = link_usettings->link_modes.advertising + i;
+					*adv = ((*adv & ~all_advertised_modes[i])
+						| (sup & all_advertised_modes[i]));
+				}
 
 				/* If driver supports unknown flags, we cannot
 				 * be sure that we enable all link modes.
 				 */
-				if ((ecmd.supported & ALL_ADVERTISED_FLAGS) !=
-				    ecmd.supported) {
-					fprintf(stderr, "Driver supports one "
-					        "or more unknown flags\n");
+				ethtool_link_mode_for_each_u32(i)
+				{
+					u32 sup = link_usettings->link_modes.supported[i];
+					if ((sup & all_advertised_flags[i]) != sup) {
+						fprintf(stderr, "Driver supports one "
+							"or more unknown flags\n");
+						break;
+					}
 				}
-			} else if (advertising_wanted > 0) {
+			} else if (NULL != advertising_wanted) {
+				unsigned int i;
+
 				/* Enable all requested modes */
-				ecmd.advertising =
-					(ecmd.advertising &
-					 ~ALL_ADVERTISED_MODES) |
-					advertising_wanted;
-			} else if (full_advertising_wanted > 0) {
-				ecmd.advertising = full_advertising_wanted;
+				ethtool_link_mode_for_each_u32(i)
+				{
+					u32 *adv = link_usettings->link_modes.advertising + i;
+					*adv = ((*adv & all_advertised_modes[i])
+						| advertising_wanted[i]);
+				}
+			} else if (NULL != full_advertising_wanted) {
+				ethtool_link_mode_copy(
+					link_usettings->link_modes.advertising,
+					full_advertising_wanted);
 			}
 
 			/* Try to perform the update. */
-			ecmd.cmd = ETHTOOL_SSET;
-			err = send_ioctl(ctx, &ecmd);
+			if (ETHTOOL_GLINKSETTINGS == link_usettings->base.cmd) {
+				err = __do_ioctl_slinksettings(ctx, link_usettings);
+			} else {
+				err = __do_ioctl_sset(ctx, link_usettings);
+			}
+			__free_link_usettings(link_usettings);
 			if (err < 0)
 				perror("Cannot set new settings");
 		}
@@ -4203,6 +4565,8 @@ int main(int argc, char **argp)
 	struct cmd_context ctx;
 	int k;
 
+	init_global_link_mode_masks();
+
 	/* Skip command name */
 	argp++;
 	argc--;
diff --git a/internal.h b/internal.h
index 5fd87f1..c8e74e6 100644
--- a/internal.h
+++ b/internal.h
@@ -127,6 +127,72 @@ static inline int test_bit(unsigned int nr, const unsigned long *addr)
 				 ETH_FLAG_TXVLAN | ETH_FLAG_NTUPLE |	\
 				 ETH_FLAG_RXHASH)
 
+/* internal API for link mode bitmap interaction with kernel. */
+
+#define __ETHTOOL_LINK_MODE_MASK_MAX_KERNEL_NU32	\
+	(SCHAR_MAX)
+#define __ETHTOOL_LINK_MODE_MASK_MAX_KERNEL_NBITS	\
+	(32*__ETHTOOL_LINK_MODE_MASK_MAX_KERNEL_NU32)
+#define __ETHTOOL_LINK_MODE_MASK_MAX_KERNEL_NBYTES	\
+	(4*__ETHTOOL_LINK_MODE_MASK_MAX_KERNEL_NU32)
+#define __ETHTOOL_DECLARE_LINK_MODE_MASK(name)			\
+	u32 name[__ETHTOOL_LINK_MODE_MASK_MAX_KERNEL_NU32]
+
+struct ethtool_link_usettings {
+	struct {
+		__u8 transceiver;
+	} deprecated;
+	struct ethtool_link_settings base;
+	struct {
+		__ETHTOOL_DECLARE_LINK_MODE_MASK(supported);
+		__ETHTOOL_DECLARE_LINK_MODE_MASK(advertising);
+		__ETHTOOL_DECLARE_LINK_MODE_MASK(lp_advertising);
+	} link_modes;
+};
+
+#define ethtool_link_mode_for_each_u32(index)				\
+	for ((index) = 0 ;						\
+	     (index) < __ETHTOOL_LINK_MODE_MASK_MAX_KERNEL_NU32 ;	\
+	     ++(index))
+
+static inline void ethtool_link_mode_zero(u32 *dst)
+{
+	memset(dst, 0, __ETHTOOL_LINK_MODE_MASK_MAX_KERNEL_NBYTES);
+}
+
+static inline int ethtool_link_mode_is_empty(const u32 *mask)
+{
+	unsigned int i;
+
+	ethtool_link_mode_for_each_u32(i)
+	{
+		if (0 != mask[i])
+			return FALSE;
+	}
+
+	return TRUE;
+}
+
+static inline void ethtool_link_mode_copy(u32 *dst, const u32 *src)
+{
+	memcpy(dst, src, __ETHTOOL_LINK_MODE_MASK_MAX_KERNEL_NBYTES);
+}
+
+static inline int ethtool_link_mode_test_bit(unsigned int nr, const u32 *mask)
+{
+	if (nr >= __ETHTOOL_LINK_MODE_MASK_MAX_KERNEL_NBITS)
+		return !!0;
+	return !!(mask[nr / 32] & (1 << (nr % 32)));
+}
+
+static inline int ethtool_link_mode_set_bit(unsigned int nr, u32 *mask)
+{
+       if (nr >= __ETHTOOL_LINK_MODE_MASK_MAX_KERNEL_NBITS)
+               return -1;
+       mask[nr / 32] |= (1 << (nr % 32));
+       return 0;
+}
+
 /* Context for sub-commands */
 struct cmd_context {
 	const char *devname;	/* net device name */
diff --git a/test-cmdline.c b/test-cmdline.c
index 2fd7cbb..2f5737c 100644
--- a/test-cmdline.c
+++ b/test-cmdline.c
@@ -37,7 +37,19 @@ static struct test_case {
 	{ 1, "--change devname autoneg foo" },
 	{ 1, "-s devname autoneg" },
 	{ 0, "--change devname advertise 0x1" },
+	{ 0, "--change devname advertise 0xf" },
+	{ 0, "--change devname advertise 1" },
+	{ 0, "--change devname advertise f" },
+	{ 0, "--change devname advertise 01" },
+	{ 0, "--change devname advertise 0f" },
+	{ 0, "--change devname advertise 0xfffffffffffffffffffffffffffffffff" },
+	{ 0, "--change devname advertise fffffffffffffffffffffffffffffffff" },
+	{ 0, "--change devname advertise 0x0000fffffffffffffffffffffffffffff" },
+	{ 0, "--change devname advertise 0000fffffffffffffffffffffffffffff" },
+	{ 1, "-s devname advertise" },
+	{ 1, "-s devname advertise 0x" },
 	{ 1, "-s devname advertise foo" },
+	{ 1, "-s devname advertise 0xfoo" },
 	{ 1, "--change devname advertise" },
 	{ 0, "-s devname phyad 1" },
 	{ 1, "--change devname phyad foo" },
-- 
2.7.0.rc3.207.g0ac5344

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