net/ethtool/stats.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-only

 #include "netlink.h"
 #include "common.h"
 #include "bitset.h"

 struct stats_req_info {
 	struct ethnl_req_info		base;
 	DECLARE_BITMAP(stat_mask, __ETHTOOL_STATS_CNT);
 	enum ethtool_mac_stats_src	src;
 };

 #define STATS_REQINFO(__req_base) \
 	container_of(__req_base, struct stats_req_info, base)

 struct stats_reply_data {
 	struct ethnl_reply_data		base;
 	struct_group(stats,
 		struct ethtool_eth_phy_stats	phy_stats;
 		struct ethtool_eth_mac_stats	mac_stats;
 		struct ethtool_eth_ctrl_stats	ctrl_stats;
 		struct ethtool_rmon_stats	rmon_stats;
 	);
 	const struct ethtool_rmon_hist_range	*rmon_ranges;
 };

 #define STATS_REPDATA(__reply_base) \
 	container_of(__reply_base, struct stats_reply_data, base)

 const char stats_std_names[__ETHTOOL_STATS_CNT][ETH_GSTRING_LEN] = {
 	[ETHTOOL_STATS_ETH_PHY]			= "eth-phy",
 	[ETHTOOL_STATS_ETH_MAC]			= "eth-mac",
 	[ETHTOOL_STATS_ETH_CTRL]		= "eth-ctrl",
 	[ETHTOOL_STATS_RMON]			= "rmon",
 };

 const char stats_eth_phy_names[__ETHTOOL_A_STATS_ETH_PHY_CNT][ETH_GSTRING_LEN] = {
 	[ETHTOOL_A_STATS_ETH_PHY_5_SYM_ERR]	= "SymbolErrorDuringCarrier",
 };

 const char stats_eth_mac_names[__ETHTOOL_A_STATS_ETH_MAC_CNT][ETH_GSTRING_LEN] = {
 	[ETHTOOL_A_STATS_ETH_MAC_2_TX_PKT]	= "FramesTransmittedOK",
 	[ETHTOOL_A_STATS_ETH_MAC_3_SINGLE_COL]	= "SingleCollisionFrames",
 	[ETHTOOL_A_STATS_ETH_MAC_4_MULTI_COL]	= "MultipleCollisionFrames",
 	[ETHTOOL_A_STATS_ETH_MAC_5_RX_PKT]	= "FramesReceivedOK",
 	[ETHTOOL_A_STATS_ETH_MAC_6_FCS_ERR]	= "FrameCheckSequenceErrors",
 	[ETHTOOL_A_STATS_ETH_MAC_7_ALIGN_ERR]	= "AlignmentErrors",
 	[ETHTOOL_A_STATS_ETH_MAC_8_TX_BYTES]	= "OctetsTransmittedOK",
 	[ETHTOOL_A_STATS_ETH_MAC_9_TX_DEFER]	= "FramesWithDeferredXmissions",
 	[ETHTOOL_A_STATS_ETH_MAC_10_LATE_COL]	= "LateCollisions",
 	[ETHTOOL_A_STATS_ETH_MAC_11_XS_COL]	= "FramesAbortedDueToXSColls",
 	[ETHTOOL_A_STATS_ETH_MAC_12_TX_INT_ERR]	= "FramesLostDueToIntMACXmitError",
 	[ETHTOOL_A_STATS_ETH_MAC_13_CS_ERR]	= "CarrierSenseErrors",
 	[ETHTOOL_A_STATS_ETH_MAC_14_RX_BYTES]	= "OctetsReceivedOK",
 	[ETHTOOL_A_STATS_ETH_MAC_15_RX_INT_ERR]	= "FramesLostDueToIntMACRcvError",
 	[ETHTOOL_A_STATS_ETH_MAC_18_TX_MCAST]	= "MulticastFramesXmittedOK",
 	[ETHTOOL_A_STATS_ETH_MAC_19_TX_BCAST]	= "BroadcastFramesXmittedOK",
 	[ETHTOOL_A_STATS_ETH_MAC_20_XS_DEFER]	= "FramesWithExcessiveDeferral",
 	[ETHTOOL_A_STATS_ETH_MAC_21_RX_MCAST]	= "MulticastFramesReceivedOK",
 	[ETHTOOL_A_STATS_ETH_MAC_22_RX_BCAST]	= "BroadcastFramesReceivedOK",
 	[ETHTOOL_A_STATS_ETH_MAC_23_IR_LEN_ERR]	= "InRangeLengthErrors",
 	[ETHTOOL_A_STATS_ETH_MAC_24_OOR_LEN]	= "OutOfRangeLengthField",
 	[ETHTOOL_A_STATS_ETH_MAC_25_TOO_LONG_ERR]	= "FrameTooLongErrors",
 };

 const char stats_eth_ctrl_names[__ETHTOOL_A_STATS_ETH_CTRL_CNT][ETH_GSTRING_LEN] = {
 	[ETHTOOL_A_STATS_ETH_CTRL_3_TX]		= "MACControlFramesTransmitted",
 	[ETHTOOL_A_STATS_ETH_CTRL_4_RX]		= "MACControlFramesReceived",
 	[ETHTOOL_A_STATS_ETH_CTRL_5_RX_UNSUP]	= "UnsupportedOpcodesReceived",
 };

 const char stats_rmon_names[__ETHTOOL_A_STATS_RMON_CNT][ETH_GSTRING_LEN] = {
 	[ETHTOOL_A_STATS_RMON_UNDERSIZE]	= "etherStatsUndersizePkts",
 	[ETHTOOL_A_STATS_RMON_OVERSIZE]		= "etherStatsOversizePkts",
 	[ETHTOOL_A_STATS_RMON_FRAG]		= "etherStatsFragments",
 	[ETHTOOL_A_STATS_RMON_JABBER]		= "etherStatsJabbers",
 };

 const struct nla_policy ethnl_stats_get_policy[ETHTOOL_A_STATS_SRC + 1] = {
 	[ETHTOOL_A_STATS_HEADER]	=
 		NLA_POLICY_NESTED(ethnl_header_policy),
 	[ETHTOOL_A_STATS_GROUPS]	= { .type = NLA_NESTED },
 	[ETHTOOL_A_STATS_SRC]		=
 		NLA_POLICY_MAX(NLA_U32, ETHTOOL_MAC_STATS_SRC_PMAC),
 };

 static int stats_parse_request(struct ethnl_req_info *req_base,
 			       struct nlattr **tb,
 			       struct netlink_ext_ack *extack)
 {
 	enum ethtool_mac_stats_src src = ETHTOOL_MAC_STATS_SRC_AGGREGATE;
 	struct stats_req_info *req_info = STATS_REQINFO(req_base);
 	bool mod = false;
 	int err;

 	err = ethnl_update_bitset(req_info->stat_mask, __ETHTOOL_STATS_CNT,
 				  tb[ETHTOOL_A_STATS_GROUPS], stats_std_names,
 				  extack, &mod);
 	if (err)
 		return err;

 	if (!mod) {
 		NL_SET_ERR_MSG(extack, "no stats requested");
 		return -EINVAL;
 	}

 	if (tb[ETHTOOL_A_STATS_SRC])
 		src = nla_get_u32(tb[ETHTOOL_A_STATS_SRC]);

 	req_info->src = src;

 	return 0;
 }

 static int stats_prepare_data(const struct ethnl_req_info *req_base,
 			      struct ethnl_reply_data *reply_base,
 			      struct genl_info *info)
 {
 	const struct stats_req_info *req_info = STATS_REQINFO(req_base);
 	struct netlink_ext_ack *extack = info ? info->extack : NULL;
 	struct stats_reply_data *data = STATS_REPDATA(reply_base);
 	enum ethtool_mac_stats_src src = req_info->src;
 	struct net_device *dev = reply_base->dev;
 	int ret;

 	ret = ethnl_ops_begin(dev);
 	if (ret < 0)
 		return ret;

 	if ((src == ETHTOOL_MAC_STATS_SRC_EMAC ||
 	     src == ETHTOOL_MAC_STATS_SRC_PMAC) &&
 	    !__ethtool_dev_mm_supported(dev)) {
 		NL_SET_ERR_MSG_MOD(extack,
 				   "Device does not support MAC merge layer");
 		ethnl_ops_complete(dev);
 		return -EOPNOTSUPP;
 	}

 	/* Mark all stats as unset (see ETHTOOL_STAT_NOT_SET) to prevent them
 	 * from being reported to user space in case driver did not set them.
 	 */
 	memset(&data->stats, 0xff, sizeof(data->stats));

 	data->phy_stats.src = src;
 	data->mac_stats.src = src;
 	data->ctrl_stats.src = src;
 	data->rmon_stats.src = src;

 	if (test_bit(ETHTOOL_STATS_ETH_PHY, req_info->stat_mask) &&
 	    dev->ethtool_ops->get_eth_phy_stats)
 		dev->ethtool_ops->get_eth_phy_stats(dev, &data->phy_stats);
 	if (test_bit(ETHTOOL_STATS_ETH_MAC, req_info->stat_mask) &&
 	    dev->ethtool_ops->get_eth_mac_stats)
 		dev->ethtool_ops->get_eth_mac_stats(dev, &data->mac_stats);
 	if (test_bit(ETHTOOL_STATS_ETH_CTRL, req_info->stat_mask) &&
 	    dev->ethtool_ops->get_eth_ctrl_stats)
 		dev->ethtool_ops->get_eth_ctrl_stats(dev, &data->ctrl_stats);
 	if (test_bit(ETHTOOL_STATS_RMON, req_info->stat_mask) &&
 	    dev->ethtool_ops->get_rmon_stats)
 		dev->ethtool_ops->get_rmon_stats(dev, &data->rmon_stats,
 						 &data->rmon_ranges);

 	ethnl_ops_complete(dev);
 	return 0;
 }

 static int stats_reply_size(const struct ethnl_req_info *req_base,
 			    const struct ethnl_reply_data *reply_base)
 {
 	const struct stats_req_info *req_info = STATS_REQINFO(req_base);
 	unsigned int n_grps = 0, n_stats = 0;
 	int len = 0;

 	len += nla_total_size(sizeof(u32)); /* _STATS_SRC */

 	if (test_bit(ETHTOOL_STATS_ETH_PHY, req_info->stat_mask)) {
 		n_stats += sizeof(struct ethtool_eth_phy_stats) / sizeof(u64);
 		n_grps++;
 	}
 	if (test_bit(ETHTOOL_STATS_ETH_MAC, req_info->stat_mask)) {
 		n_stats += sizeof(struct ethtool_eth_mac_stats) / sizeof(u64);
 		n_grps++;
 	}
 	if (test_bit(ETHTOOL_STATS_ETH_CTRL, req_info->stat_mask)) {
 		n_stats += sizeof(struct ethtool_eth_ctrl_stats) / sizeof(u64);
 		n_grps++;
 	}
 	if (test_bit(ETHTOOL_STATS_RMON, req_info->stat_mask)) {
 		n_stats += sizeof(struct ethtool_rmon_stats) / sizeof(u64);
 		n_grps++;
 		/* Above includes the space for _A_STATS_GRP_HIST_VALs */

 		len += (nla_total_size(0) +	/* _A_STATS_GRP_HIST */
 			nla_total_size(4) +	/* _A_STATS_GRP_HIST_BKT_LOW */
 			nla_total_size(4)) *	/* _A_STATS_GRP_HIST_BKT_HI */
 			ETHTOOL_RMON_HIST_MAX * 2;
 	}

 	len += n_grps * (nla_total_size(0) + /* _A_STATS_GRP */
 			 nla_total_size(4) + /* _A_STATS_GRP_ID */
 			 nla_total_size(4)); /* _A_STATS_GRP_SS_ID */
 	len += n_stats * (nla_total_size(0) + /* _A_STATS_GRP_STAT */
 			  nla_total_size_64bit(sizeof(u64)));

 	return len;
 }

 static int stat_put(struct sk_buff *skb, u16 attrtype, u64 val)
 {
 	struct nlattr *nest;
 	int ret;

 	if (val == ETHTOOL_STAT_NOT_SET)
 		return 0;

 	/* We want to start stats attr types from 0, so we don't have a type
 	 * for pad inside ETHTOOL_A_STATS_GRP_STAT. Pad things on the outside
 	 * of ETHTOOL_A_STATS_GRP_STAT. Since we're one nest away from the
 	 * actual attr we're 4B off - nla_need_padding_for_64bit() & co.
 	 * can't be used.
 	 */
 #ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
 	if (!IS_ALIGNED((unsigned long)skb_tail_pointer(skb), 8))
 		if (!nla_reserve(skb, ETHTOOL_A_STATS_GRP_PAD, 0))
 			return -EMSGSIZE;
 #endif

 	nest = nla_nest_start(skb, ETHTOOL_A_STATS_GRP_STAT);
 	if (!nest)
 		return -EMSGSIZE;

 	ret = nla_put_u64_64bit(skb, attrtype, val, -1 /* not used */);
 	if (ret) {
 		nla_nest_cancel(skb, nest);
 		return ret;
 	}

 	nla_nest_end(skb, nest);
 	return 0;
 }

 static int stats_put_phy_stats(struct sk_buff *skb,
 			       const struct stats_reply_data *data)
 {
 	if (stat_put(skb, ETHTOOL_A_STATS_ETH_PHY_5_SYM_ERR,
 		     data->phy_stats.SymbolErrorDuringCarrier))
 		return -EMSGSIZE;
 	return 0;
 }

 static int stats_put_mac_stats(struct sk_buff *skb,
 			       const struct stats_reply_data *data)
 {
 	if (stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_2_TX_PKT,
 		     data->mac_stats.FramesTransmittedOK) ||
 	    stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_3_SINGLE_COL,
 		     data->mac_stats.SingleCollisionFrames) ||
 	    stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_4_MULTI_COL,
 		     data->mac_stats.MultipleCollisionFrames) ||
 	    stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_5_RX_PKT,
 		     data->mac_stats.FramesReceivedOK) ||
 	    stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_6_FCS_ERR,
 		     data->mac_stats.FrameCheckSequenceErrors) ||
 	    stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_7_ALIGN_ERR,
 		     data->mac_stats.AlignmentErrors) ||
 	    stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_8_TX_BYTES,
 		     data->mac_stats.OctetsTransmittedOK) ||
 	    stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_9_TX_DEFER,
 		     data->mac_stats.FramesWithDeferredXmissions) ||
 	    stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_10_LATE_COL,
 		     data->mac_stats.LateCollisions) ||
 	    stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_11_XS_COL,
 		     data->mac_stats.FramesAbortedDueToXSColls) ||
 	    stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_12_TX_INT_ERR,
 		     data->mac_stats.FramesLostDueToIntMACXmitError) ||
 	    stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_13_CS_ERR,
 		     data->mac_stats.CarrierSenseErrors) ||
 	    stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_14_RX_BYTES,
 		     data->mac_stats.OctetsReceivedOK) ||
 	    stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_15_RX_INT_ERR,
 		     data->mac_stats.FramesLostDueToIntMACRcvError) ||
 	    stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_18_TX_MCAST,
 		     data->mac_stats.MulticastFramesXmittedOK) ||
 	    stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_19_TX_BCAST,
 		     data->mac_stats.BroadcastFramesXmittedOK) ||
 	    stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_20_XS_DEFER,
 		     data->mac_stats.FramesWithExcessiveDeferral) ||
 	    stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_21_RX_MCAST,
 		     data->mac_stats.MulticastFramesReceivedOK) ||
 	    stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_22_RX_BCAST,
 		     data->mac_stats.BroadcastFramesReceivedOK) ||
 	    stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_23_IR_LEN_ERR,
 		     data->mac_stats.InRangeLengthErrors) ||
 	    stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_24_OOR_LEN,
 		     data->mac_stats.OutOfRangeLengthField) ||
 	    stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_25_TOO_LONG_ERR,
 		     data->mac_stats.FrameTooLongErrors))
 		return -EMSGSIZE;
 	return 0;
 }

 static int stats_put_ctrl_stats(struct sk_buff *skb,
 				const struct stats_reply_data *data)
 {
 	if (stat_put(skb, ETHTOOL_A_STATS_ETH_CTRL_3_TX,
 		     data->ctrl_stats.MACControlFramesTransmitted) ||
 	    stat_put(skb, ETHTOOL_A_STATS_ETH_CTRL_4_RX,
 		     data->ctrl_stats.MACControlFramesReceived) ||
 	    stat_put(skb, ETHTOOL_A_STATS_ETH_CTRL_5_RX_UNSUP,
 		     data->ctrl_stats.UnsupportedOpcodesReceived))
 		return -EMSGSIZE;
 	return 0;
 }

 static int stats_put_rmon_hist(struct sk_buff *skb, u32 attr, const u64 *hist,
 			       const struct ethtool_rmon_hist_range *ranges)
 {
 	struct nlattr *nest;
 	int i;

 	if (!ranges)
 		return 0;

 	for (i = 0; i <	ETHTOOL_RMON_HIST_MAX; i++) {
 		if (!ranges[i].low && !ranges[i].high)
 			break;
 		if (hist[i] == ETHTOOL_STAT_NOT_SET)
 			continue;

 		nest = nla_nest_start(skb, attr);
 		if (!nest)
 			return -EMSGSIZE;

 		if (nla_put_u32(skb, ETHTOOL_A_STATS_GRP_HIST_BKT_LOW,
 				ranges[i].low) ||
 		    nla_put_u32(skb, ETHTOOL_A_STATS_GRP_HIST_BKT_HI,
 				ranges[i].high) ||
 		    nla_put_u64_64bit(skb, ETHTOOL_A_STATS_GRP_HIST_VAL,
 				      hist[i], ETHTOOL_A_STATS_GRP_PAD))
 			goto err_cancel_hist;

 		nla_nest_end(skb, nest);
 	}

 	return 0;

 err_cancel_hist:
 	nla_nest_cancel(skb, nest);
 	return -EMSGSIZE;
 }

 static int stats_put_rmon_stats(struct sk_buff *skb,
 				const struct stats_reply_data *data)
 {
 	if (stats_put_rmon_hist(skb, ETHTOOL_A_STATS_GRP_HIST_RX,
 				data->rmon_stats.hist, data->rmon_ranges) ||
 	    stats_put_rmon_hist(skb, ETHTOOL_A_STATS_GRP_HIST_TX,
 				data->rmon_stats.hist_tx, data->rmon_ranges))
 		return -EMSGSIZE;

 	if (stat_put(skb, ETHTOOL_A_STATS_RMON_UNDERSIZE,
 		     data->rmon_stats.undersize_pkts) ||
 	    stat_put(skb, ETHTOOL_A_STATS_RMON_OVERSIZE,
 		     data->rmon_stats.oversize_pkts) ||
 	    stat_put(skb, ETHTOOL_A_STATS_RMON_FRAG,
 		     data->rmon_stats.fragments) ||
 	    stat_put(skb, ETHTOOL_A_STATS_RMON_JABBER,
 		     data->rmon_stats.jabbers))
 		return -EMSGSIZE;

 	return 0;
 }

 static int stats_put_stats(struct sk_buff *skb,
 			   const struct stats_reply_data *data,
 			   u32 id, u32 ss_id,
 			   int (*cb)(struct sk_buff *skb,
 				     const struct stats_reply_data *data))
 {
 	struct nlattr *nest;

 	nest = nla_nest_start(skb, ETHTOOL_A_STATS_GRP);
 	if (!nest)
 		return -EMSGSIZE;

 	if (nla_put_u32(skb, ETHTOOL_A_STATS_GRP_ID, id) ||
 	    nla_put_u32(skb, ETHTOOL_A_STATS_GRP_SS_ID, ss_id))
 		goto err_cancel;

 	if (cb(skb, data))
 		goto err_cancel;

 	nla_nest_end(skb, nest);
 	return 0;

 err_cancel:
 	nla_nest_cancel(skb, nest);
 	return -EMSGSIZE;
 }

 static int stats_fill_reply(struct sk_buff *skb,
 			    const struct ethnl_req_info *req_base,
 			    const struct ethnl_reply_data *reply_base)
 {
 	const struct stats_req_info *req_info = STATS_REQINFO(req_base);
 	const struct stats_reply_data *data = STATS_REPDATA(reply_base);
 	int ret = 0;

 	if (nla_put_u32(skb, ETHTOOL_A_STATS_SRC, req_info->src))
 		return -EMSGSIZE;

 	if (!ret && test_bit(ETHTOOL_STATS_ETH_PHY, req_info->stat_mask))
 		ret = stats_put_stats(skb, data, ETHTOOL_STATS_ETH_PHY,
 				      ETH_SS_STATS_ETH_PHY,
 				      stats_put_phy_stats);
 	if (!ret && test_bit(ETHTOOL_STATS_ETH_MAC, req_info->stat_mask))
 		ret = stats_put_stats(skb, data, ETHTOOL_STATS_ETH_MAC,
 				      ETH_SS_STATS_ETH_MAC,
 				      stats_put_mac_stats);
 	if (!ret && test_bit(ETHTOOL_STATS_ETH_CTRL, req_info->stat_mask))
 		ret = stats_put_stats(skb, data, ETHTOOL_STATS_ETH_CTRL,
 				      ETH_SS_STATS_ETH_CTRL,
 				      stats_put_ctrl_stats);
 	if (!ret && test_bit(ETHTOOL_STATS_RMON, req_info->stat_mask))
 		ret = stats_put_stats(skb, data, ETHTOOL_STATS_RMON,
 				      ETH_SS_STATS_RMON, stats_put_rmon_stats);

 	return ret;
 }

 const struct ethnl_request_ops ethnl_stats_request_ops = {
 	.request_cmd		= ETHTOOL_MSG_STATS_GET,
 	.reply_cmd		= ETHTOOL_MSG_STATS_GET_REPLY,
 	.hdr_attr		= ETHTOOL_A_STATS_HEADER,
 	.req_info_size		= sizeof(struct stats_req_info),
 	.reply_data_size	= sizeof(struct stats_reply_data),

 	.parse_request		= stats_parse_request,
 	.prepare_data		= stats_prepare_data,
 	.reply_size		= stats_reply_size,
 	.fill_reply		= stats_fill_reply,
 };

 static u64 ethtool_stats_sum(u64 a, u64 b)
 {
 	if (a == ETHTOOL_STAT_NOT_SET)
 		return b;
 	if (b == ETHTOOL_STAT_NOT_SET)
 		return a;
 	return a + b;
 }

 /* Avoid modifying the aggregation procedure every time a new counter is added
  * by treating the structures as an array of u64 statistics.
  */
 static void ethtool_aggregate_stats(void *aggr_stats, const void *emac_stats,
 				    const void *pmac_stats, size_t stats_size,
 				    size_t stats_offset)
 {
 	size_t num_stats = stats_size / sizeof(u64);
 	const u64 *s1 = emac_stats + stats_offset;
 	const u64 *s2 = pmac_stats + stats_offset;
 	u64 *s = aggr_stats + stats_offset;
 	int i;

 	for (i = 0; i < num_stats; i++)
 		s[i] = ethtool_stats_sum(s1[i], s2[i]);
 }

 void ethtool_aggregate_mac_stats(struct net_device *dev,
 				 struct ethtool_eth_mac_stats *mac_stats)
 {
 	const struct ethtool_ops *ops = dev->ethtool_ops;
 	struct ethtool_eth_mac_stats pmac, emac;

 	memset(&emac, 0xff, sizeof(emac));
 	memset(&pmac, 0xff, sizeof(pmac));
 	emac.src = ETHTOOL_MAC_STATS_SRC_EMAC;
 	pmac.src = ETHTOOL_MAC_STATS_SRC_PMAC;

 	ops->get_eth_mac_stats(dev, &emac);
 	ops->get_eth_mac_stats(dev, &pmac);

 	ethtool_aggregate_stats(mac_stats, &emac, &pmac,
 				sizeof(mac_stats->stats),
 				offsetof(struct ethtool_eth_mac_stats, stats));
 }
 EXPORT_SYMBOL(ethtool_aggregate_mac_stats);

 void ethtool_aggregate_phy_stats(struct net_device *dev,
 				 struct ethtool_eth_phy_stats *phy_stats)
 {
 	const struct ethtool_ops *ops = dev->ethtool_ops;
 	struct ethtool_eth_phy_stats pmac, emac;

 	memset(&emac, 0xff, sizeof(emac));
 	memset(&pmac, 0xff, sizeof(pmac));
 	emac.src = ETHTOOL_MAC_STATS_SRC_EMAC;
 	pmac.src = ETHTOOL_MAC_STATS_SRC_PMAC;

 	ops->get_eth_phy_stats(dev, &emac);
 	ops->get_eth_phy_stats(dev, &pmac);

 	ethtool_aggregate_stats(phy_stats, &emac, &pmac,
 				sizeof(phy_stats->stats),
 				offsetof(struct ethtool_eth_phy_stats, stats));
 }
 EXPORT_SYMBOL(ethtool_aggregate_phy_stats);

 void ethtool_aggregate_ctrl_stats(struct net_device *dev,
 				  struct ethtool_eth_ctrl_stats *ctrl_stats)
 {
 	const struct ethtool_ops *ops = dev->ethtool_ops;
 	struct ethtool_eth_ctrl_stats pmac, emac;

 	memset(&emac, 0xff, sizeof(emac));
 	memset(&pmac, 0xff, sizeof(pmac));
 	emac.src = ETHTOOL_MAC_STATS_SRC_EMAC;
 	pmac.src = ETHTOOL_MAC_STATS_SRC_PMAC;

 	ops->get_eth_ctrl_stats(dev, &emac);
 	ops->get_eth_ctrl_stats(dev, &pmac);

 	ethtool_aggregate_stats(ctrl_stats, &emac, &pmac,
 				sizeof(ctrl_stats->stats),
 				offsetof(struct ethtool_eth_ctrl_stats, stats));
 }
 EXPORT_SYMBOL(ethtool_aggregate_ctrl_stats);

 void ethtool_aggregate_pause_stats(struct net_device *dev,
 				   struct ethtool_pause_stats *pause_stats)
 {
 	const struct ethtool_ops *ops = dev->ethtool_ops;
 	struct ethtool_pause_stats pmac, emac;

 	memset(&emac, 0xff, sizeof(emac));
 	memset(&pmac, 0xff, sizeof(pmac));
 	emac.src = ETHTOOL_MAC_STATS_SRC_EMAC;
 	pmac.src = ETHTOOL_MAC_STATS_SRC_PMAC;

 	ops->get_pause_stats(dev, &emac);
 	ops->get_pause_stats(dev, &pmac);

 	ethtool_aggregate_stats(pause_stats, &emac, &pmac,
 				sizeof(pause_stats->stats),
 				offsetof(struct ethtool_pause_stats, stats));
 }
 EXPORT_SYMBOL(ethtool_aggregate_pause_stats);

 void ethtool_aggregate_rmon_stats(struct net_device *dev,
 				  struct ethtool_rmon_stats *rmon_stats)
 {
 	const struct ethtool_ops *ops = dev->ethtool_ops;
 	const struct ethtool_rmon_hist_range *dummy;
 	struct ethtool_rmon_stats pmac, emac;

 	memset(&emac, 0xff, sizeof(emac));
 	memset(&pmac, 0xff, sizeof(pmac));
 	emac.src = ETHTOOL_MAC_STATS_SRC_EMAC;
 	pmac.src = ETHTOOL_MAC_STATS_SRC_PMAC;

 	ops->get_rmon_stats(dev, &emac, &dummy);
 	ops->get_rmon_stats(dev, &pmac, &dummy);

 	ethtool_aggregate_stats(rmon_stats, &emac, &pmac,
 				sizeof(rmon_stats->stats),
 				offsetof(struct ethtool_rmon_stats, stats));
 }
 EXPORT_SYMBOL(ethtool_aggregate_rmon_stats);
	// SPDX-License-Identifier: GPL-2.0-only

	#include "netlink.h"
	#include "common.h"
	#include "bitset.h"

	struct stats_req_info {
	struct ethnl_req_info base;
	DECLARE_BITMAP(stat_mask, __ETHTOOL_STATS_CNT);
	enum ethtool_mac_stats_src src;
	};

	#define STATS_REQINFO(__req_base) \
	container_of(__req_base, struct stats_req_info, base)

	struct stats_reply_data {
	struct ethnl_reply_data base;
	struct_group(stats,
	struct ethtool_eth_phy_stats phy_stats;
	struct ethtool_eth_mac_stats mac_stats;
	struct ethtool_eth_ctrl_stats ctrl_stats;
	struct ethtool_rmon_stats rmon_stats;
	);
	const struct ethtool_rmon_hist_range *rmon_ranges;
	};

	#define STATS_REPDATA(__reply_base) \
	container_of(__reply_base, struct stats_reply_data, base)

	const char stats_std_names[__ETHTOOL_STATS_CNT][ETH_GSTRING_LEN] = {
	[ETHTOOL_STATS_ETH_PHY] = "eth-phy",
	[ETHTOOL_STATS_ETH_MAC] = "eth-mac",
	[ETHTOOL_STATS_ETH_CTRL] = "eth-ctrl",
	[ETHTOOL_STATS_RMON] = "rmon",
	};

	const char stats_eth_phy_names[__ETHTOOL_A_STATS_ETH_PHY_CNT][ETH_GSTRING_LEN] = {
	[ETHTOOL_A_STATS_ETH_PHY_5_SYM_ERR] = "SymbolErrorDuringCarrier",
	};

	const char stats_eth_mac_names[__ETHTOOL_A_STATS_ETH_MAC_CNT][ETH_GSTRING_LEN] = {
	[ETHTOOL_A_STATS_ETH_MAC_2_TX_PKT] = "FramesTransmittedOK",
	[ETHTOOL_A_STATS_ETH_MAC_3_SINGLE_COL] = "SingleCollisionFrames",
	[ETHTOOL_A_STATS_ETH_MAC_4_MULTI_COL] = "MultipleCollisionFrames",
	[ETHTOOL_A_STATS_ETH_MAC_5_RX_PKT] = "FramesReceivedOK",
	[ETHTOOL_A_STATS_ETH_MAC_6_FCS_ERR] = "FrameCheckSequenceErrors",
	[ETHTOOL_A_STATS_ETH_MAC_7_ALIGN_ERR] = "AlignmentErrors",
	[ETHTOOL_A_STATS_ETH_MAC_8_TX_BYTES] = "OctetsTransmittedOK",
	[ETHTOOL_A_STATS_ETH_MAC_9_TX_DEFER] = "FramesWithDeferredXmissions",
	[ETHTOOL_A_STATS_ETH_MAC_10_LATE_COL] = "LateCollisions",
	[ETHTOOL_A_STATS_ETH_MAC_11_XS_COL] = "FramesAbortedDueToXSColls",
	[ETHTOOL_A_STATS_ETH_MAC_12_TX_INT_ERR] = "FramesLostDueToIntMACXmitError",
	[ETHTOOL_A_STATS_ETH_MAC_13_CS_ERR] = "CarrierSenseErrors",
	[ETHTOOL_A_STATS_ETH_MAC_14_RX_BYTES] = "OctetsReceivedOK",
	[ETHTOOL_A_STATS_ETH_MAC_15_RX_INT_ERR] = "FramesLostDueToIntMACRcvError",
	[ETHTOOL_A_STATS_ETH_MAC_18_TX_MCAST] = "MulticastFramesXmittedOK",
	[ETHTOOL_A_STATS_ETH_MAC_19_TX_BCAST] = "BroadcastFramesXmittedOK",
	[ETHTOOL_A_STATS_ETH_MAC_20_XS_DEFER] = "FramesWithExcessiveDeferral",
	[ETHTOOL_A_STATS_ETH_MAC_21_RX_MCAST] = "MulticastFramesReceivedOK",
	[ETHTOOL_A_STATS_ETH_MAC_22_RX_BCAST] = "BroadcastFramesReceivedOK",
	[ETHTOOL_A_STATS_ETH_MAC_23_IR_LEN_ERR] = "InRangeLengthErrors",
	[ETHTOOL_A_STATS_ETH_MAC_24_OOR_LEN] = "OutOfRangeLengthField",
	[ETHTOOL_A_STATS_ETH_MAC_25_TOO_LONG_ERR] = "FrameTooLongErrors",
	};

	const char stats_eth_ctrl_names[__ETHTOOL_A_STATS_ETH_CTRL_CNT][ETH_GSTRING_LEN] = {
	[ETHTOOL_A_STATS_ETH_CTRL_3_TX] = "MACControlFramesTransmitted",
	[ETHTOOL_A_STATS_ETH_CTRL_4_RX] = "MACControlFramesReceived",
	[ETHTOOL_A_STATS_ETH_CTRL_5_RX_UNSUP] = "UnsupportedOpcodesReceived",
	};

	const char stats_rmon_names[__ETHTOOL_A_STATS_RMON_CNT][ETH_GSTRING_LEN] = {
	[ETHTOOL_A_STATS_RMON_UNDERSIZE] = "etherStatsUndersizePkts",
	[ETHTOOL_A_STATS_RMON_OVERSIZE] = "etherStatsOversizePkts",
	[ETHTOOL_A_STATS_RMON_FRAG] = "etherStatsFragments",
	[ETHTOOL_A_STATS_RMON_JABBER] = "etherStatsJabbers",
	};

	const struct nla_policy ethnl_stats_get_policy[ETHTOOL_A_STATS_SRC + 1] = {
	[ETHTOOL_A_STATS_HEADER] =
	NLA_POLICY_NESTED(ethnl_header_policy),
	[ETHTOOL_A_STATS_GROUPS] = { .type = NLA_NESTED },
	[ETHTOOL_A_STATS_SRC] =
	NLA_POLICY_MAX(NLA_U32, ETHTOOL_MAC_STATS_SRC_PMAC),
	};

	static int stats_parse_request(struct ethnl_req_info *req_base,
	struct nlattr **tb,
	struct netlink_ext_ack *extack)
	{
	enum ethtool_mac_stats_src src = ETHTOOL_MAC_STATS_SRC_AGGREGATE;
	struct stats_req_info *req_info = STATS_REQINFO(req_base);
	bool mod = false;
	int err;

	err = ethnl_update_bitset(req_info->stat_mask, __ETHTOOL_STATS_CNT,
	tb[ETHTOOL_A_STATS_GROUPS], stats_std_names,
	extack, &mod);
	if (err)
	return err;

	if (!mod) {
	NL_SET_ERR_MSG(extack, "no stats requested");
	return -EINVAL;
	}

	if (tb[ETHTOOL_A_STATS_SRC])
	src = nla_get_u32(tb[ETHTOOL_A_STATS_SRC]);

	req_info->src = src;

	return 0;
	}

	static int stats_prepare_data(const struct ethnl_req_info *req_base,
	struct ethnl_reply_data *reply_base,
	struct genl_info *info)
	{
	const struct stats_req_info *req_info = STATS_REQINFO(req_base);
	struct netlink_ext_ack *extack = info ? info->extack : NULL;
	struct stats_reply_data *data = STATS_REPDATA(reply_base);
	enum ethtool_mac_stats_src src = req_info->src;
	struct net_device *dev = reply_base->dev;
	int ret;

	ret = ethnl_ops_begin(dev);
	if (ret < 0)
	return ret;

	if ((src == ETHTOOL_MAC_STATS_SRC_EMAC \|\|
	src == ETHTOOL_MAC_STATS_SRC_PMAC) &&
	!__ethtool_dev_mm_supported(dev)) {
	NL_SET_ERR_MSG_MOD(extack,
	"Device does not support MAC merge layer");
	ethnl_ops_complete(dev);
	return -EOPNOTSUPP;
	}

	/* Mark all stats as unset (see ETHTOOL_STAT_NOT_SET) to prevent them
	* from being reported to user space in case driver did not set them.
	*/
	memset(&data->stats, 0xff, sizeof(data->stats));

	data->phy_stats.src = src;
	data->mac_stats.src = src;
	data->ctrl_stats.src = src;
	data->rmon_stats.src = src;

	if (test_bit(ETHTOOL_STATS_ETH_PHY, req_info->stat_mask) &&
	dev->ethtool_ops->get_eth_phy_stats)
	dev->ethtool_ops->get_eth_phy_stats(dev, &data->phy_stats);
	if (test_bit(ETHTOOL_STATS_ETH_MAC, req_info->stat_mask) &&
	dev->ethtool_ops->get_eth_mac_stats)
	dev->ethtool_ops->get_eth_mac_stats(dev, &data->mac_stats);
	if (test_bit(ETHTOOL_STATS_ETH_CTRL, req_info->stat_mask) &&
	dev->ethtool_ops->get_eth_ctrl_stats)
	dev->ethtool_ops->get_eth_ctrl_stats(dev, &data->ctrl_stats);
	if (test_bit(ETHTOOL_STATS_RMON, req_info->stat_mask) &&
	dev->ethtool_ops->get_rmon_stats)
	dev->ethtool_ops->get_rmon_stats(dev, &data->rmon_stats,
	&data->rmon_ranges);

	ethnl_ops_complete(dev);
	return 0;
	}

	static int stats_reply_size(const struct ethnl_req_info *req_base,
	const struct ethnl_reply_data *reply_base)
	{
	const struct stats_req_info *req_info = STATS_REQINFO(req_base);
	unsigned int n_grps = 0, n_stats = 0;
	int len = 0;

	len += nla_total_size(sizeof(u32)); /* _STATS_SRC */

	if (test_bit(ETHTOOL_STATS_ETH_PHY, req_info->stat_mask)) {
	n_stats += sizeof(struct ethtool_eth_phy_stats) / sizeof(u64);
	n_grps++;
	}
	if (test_bit(ETHTOOL_STATS_ETH_MAC, req_info->stat_mask)) {
	n_stats += sizeof(struct ethtool_eth_mac_stats) / sizeof(u64);
	n_grps++;
	}
	if (test_bit(ETHTOOL_STATS_ETH_CTRL, req_info->stat_mask)) {
	n_stats += sizeof(struct ethtool_eth_ctrl_stats) / sizeof(u64);
	n_grps++;
	}
	if (test_bit(ETHTOOL_STATS_RMON, req_info->stat_mask)) {
	n_stats += sizeof(struct ethtool_rmon_stats) / sizeof(u64);
	n_grps++;
	/* Above includes the space for _A_STATS_GRP_HIST_VALs */

	len += (nla_total_size(0) + /* _A_STATS_GRP_HIST */
	nla_total_size(4) + /* _A_STATS_GRP_HIST_BKT_LOW */
	nla_total_size(4)) * /* _A_STATS_GRP_HIST_BKT_HI */
	ETHTOOL_RMON_HIST_MAX * 2;
	}

	len += n_grps * (nla_total_size(0) + /* _A_STATS_GRP */
	nla_total_size(4) + /* _A_STATS_GRP_ID */
	nla_total_size(4)); /* _A_STATS_GRP_SS_ID */
	len += n_stats * (nla_total_size(0) + /* _A_STATS_GRP_STAT */
	nla_total_size_64bit(sizeof(u64)));

	return len;
	}

	static int stat_put(struct sk_buff *skb, u16 attrtype, u64 val)
	{
	struct nlattr *nest;
	int ret;

	if (val == ETHTOOL_STAT_NOT_SET)
	return 0;

	/* We want to start stats attr types from 0, so we don't have a type
	* for pad inside ETHTOOL_A_STATS_GRP_STAT. Pad things on the outside
	* of ETHTOOL_A_STATS_GRP_STAT. Since we're one nest away from the
	* actual attr we're 4B off - nla_need_padding_for_64bit() & co.
	* can't be used.
	*/
	#ifndef CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
	if (!IS_ALIGNED((unsigned long)skb_tail_pointer(skb), 8))
	if (!nla_reserve(skb, ETHTOOL_A_STATS_GRP_PAD, 0))
	return -EMSGSIZE;
	#endif

	nest = nla_nest_start(skb, ETHTOOL_A_STATS_GRP_STAT);
	if (!nest)
	return -EMSGSIZE;

	ret = nla_put_u64_64bit(skb, attrtype, val, -1 /* not used */);
	if (ret) {
	nla_nest_cancel(skb, nest);
	return ret;
	}

	nla_nest_end(skb, nest);
	return 0;
	}

	static int stats_put_phy_stats(struct sk_buff *skb,
	const struct stats_reply_data *data)
	{
	if (stat_put(skb, ETHTOOL_A_STATS_ETH_PHY_5_SYM_ERR,
	data->phy_stats.SymbolErrorDuringCarrier))
	return -EMSGSIZE;
	return 0;
	}

	static int stats_put_mac_stats(struct sk_buff *skb,
	const struct stats_reply_data *data)
	{
	if (stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_2_TX_PKT,
	data->mac_stats.FramesTransmittedOK) \|\|
	stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_3_SINGLE_COL,
	data->mac_stats.SingleCollisionFrames) \|\|
	stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_4_MULTI_COL,
	data->mac_stats.MultipleCollisionFrames) \|\|
	stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_5_RX_PKT,
	data->mac_stats.FramesReceivedOK) \|\|
	stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_6_FCS_ERR,
	data->mac_stats.FrameCheckSequenceErrors) \|\|
	stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_7_ALIGN_ERR,
	data->mac_stats.AlignmentErrors) \|\|
	stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_8_TX_BYTES,
	data->mac_stats.OctetsTransmittedOK) \|\|
	stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_9_TX_DEFER,
	data->mac_stats.FramesWithDeferredXmissions) \|\|
	stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_10_LATE_COL,
	data->mac_stats.LateCollisions) \|\|
	stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_11_XS_COL,
	data->mac_stats.FramesAbortedDueToXSColls) \|\|
	stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_12_TX_INT_ERR,
	data->mac_stats.FramesLostDueToIntMACXmitError) \|\|
	stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_13_CS_ERR,
	data->mac_stats.CarrierSenseErrors) \|\|
	stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_14_RX_BYTES,
	data->mac_stats.OctetsReceivedOK) \|\|
	stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_15_RX_INT_ERR,
	data->mac_stats.FramesLostDueToIntMACRcvError) \|\|
	stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_18_TX_MCAST,
	data->mac_stats.MulticastFramesXmittedOK) \|\|
	stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_19_TX_BCAST,
	data->mac_stats.BroadcastFramesXmittedOK) \|\|
	stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_20_XS_DEFER,
	data->mac_stats.FramesWithExcessiveDeferral) \|\|
	stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_21_RX_MCAST,
	data->mac_stats.MulticastFramesReceivedOK) \|\|
	stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_22_RX_BCAST,
	data->mac_stats.BroadcastFramesReceivedOK) \|\|
	stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_23_IR_LEN_ERR,
	data->mac_stats.InRangeLengthErrors) \|\|
	stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_24_OOR_LEN,
	data->mac_stats.OutOfRangeLengthField) \|\|
	stat_put(skb, ETHTOOL_A_STATS_ETH_MAC_25_TOO_LONG_ERR,
	data->mac_stats.FrameTooLongErrors))
	return -EMSGSIZE;
	return 0;
	}

	static int stats_put_ctrl_stats(struct sk_buff *skb,
	const struct stats_reply_data *data)
	{
	if (stat_put(skb, ETHTOOL_A_STATS_ETH_CTRL_3_TX,
	data->ctrl_stats.MACControlFramesTransmitted) \|\|
	stat_put(skb, ETHTOOL_A_STATS_ETH_CTRL_4_RX,
	data->ctrl_stats.MACControlFramesReceived) \|\|
	stat_put(skb, ETHTOOL_A_STATS_ETH_CTRL_5_RX_UNSUP,
	data->ctrl_stats.UnsupportedOpcodesReceived))
	return -EMSGSIZE;
	return 0;
	}

	static int stats_put_rmon_hist(struct sk_buff skb, u32 attr, const u64 hist,
	const struct ethtool_rmon_hist_range *ranges)
	{
	struct nlattr *nest;
	int i;

	if (!ranges)
	return 0;

	for (i = 0; i < ETHTOOL_RMON_HIST_MAX; i++) {
	if (!ranges[i].low && !ranges[i].high)
	break;
	if (hist[i] == ETHTOOL_STAT_NOT_SET)
	continue;

	nest = nla_nest_start(skb, attr);
	if (!nest)
	return -EMSGSIZE;

	if (nla_put_u32(skb, ETHTOOL_A_STATS_GRP_HIST_BKT_LOW,
	ranges[i].low) \|\|
	nla_put_u32(skb, ETHTOOL_A_STATS_GRP_HIST_BKT_HI,
	ranges[i].high) \|\|
	nla_put_u64_64bit(skb, ETHTOOL_A_STATS_GRP_HIST_VAL,
	hist[i], ETHTOOL_A_STATS_GRP_PAD))
	goto err_cancel_hist;

	nla_nest_end(skb, nest);
	}

	return 0;

	err_cancel_hist:
	nla_nest_cancel(skb, nest);
	return -EMSGSIZE;
	}

	static int stats_put_rmon_stats(struct sk_buff *skb,
	const struct stats_reply_data *data)
	{
	if (stats_put_rmon_hist(skb, ETHTOOL_A_STATS_GRP_HIST_RX,
	data->rmon_stats.hist, data->rmon_ranges) \|\|
	stats_put_rmon_hist(skb, ETHTOOL_A_STATS_GRP_HIST_TX,
	data->rmon_stats.hist_tx, data->rmon_ranges))
	return -EMSGSIZE;

	if (stat_put(skb, ETHTOOL_A_STATS_RMON_UNDERSIZE,
	data->rmon_stats.undersize_pkts) \|\|
	stat_put(skb, ETHTOOL_A_STATS_RMON_OVERSIZE,
	data->rmon_stats.oversize_pkts) \|\|
	stat_put(skb, ETHTOOL_A_STATS_RMON_FRAG,
	data->rmon_stats.fragments) \|\|
	stat_put(skb, ETHTOOL_A_STATS_RMON_JABBER,
	data->rmon_stats.jabbers))
	return -EMSGSIZE;

	return 0;
	}

	static int stats_put_stats(struct sk_buff *skb,
	const struct stats_reply_data *data,
	u32 id, u32 ss_id,
	int (cb)(struct sk_buff skb,
	const struct stats_reply_data *data))
	{
	struct nlattr *nest;

	nest = nla_nest_start(skb, ETHTOOL_A_STATS_GRP);
	if (!nest)
	return -EMSGSIZE;

	if (nla_put_u32(skb, ETHTOOL_A_STATS_GRP_ID, id) \|\|
	nla_put_u32(skb, ETHTOOL_A_STATS_GRP_SS_ID, ss_id))
	goto err_cancel;

	if (cb(skb, data))
	goto err_cancel;

	nla_nest_end(skb, nest);
	return 0;

	err_cancel:
	nla_nest_cancel(skb, nest);
	return -EMSGSIZE;
	}

	static int stats_fill_reply(struct sk_buff *skb,
	const struct ethnl_req_info *req_base,
	const struct ethnl_reply_data *reply_base)
	{
	const struct stats_req_info *req_info = STATS_REQINFO(req_base);
	const struct stats_reply_data *data = STATS_REPDATA(reply_base);
	int ret = 0;

	if (nla_put_u32(skb, ETHTOOL_A_STATS_SRC, req_info->src))
	return -EMSGSIZE;

	if (!ret && test_bit(ETHTOOL_STATS_ETH_PHY, req_info->stat_mask))
	ret = stats_put_stats(skb, data, ETHTOOL_STATS_ETH_PHY,
	ETH_SS_STATS_ETH_PHY,
	stats_put_phy_stats);
	if (!ret && test_bit(ETHTOOL_STATS_ETH_MAC, req_info->stat_mask))
	ret = stats_put_stats(skb, data, ETHTOOL_STATS_ETH_MAC,
	ETH_SS_STATS_ETH_MAC,
	stats_put_mac_stats);
	if (!ret && test_bit(ETHTOOL_STATS_ETH_CTRL, req_info->stat_mask))
	ret = stats_put_stats(skb, data, ETHTOOL_STATS_ETH_CTRL,
	ETH_SS_STATS_ETH_CTRL,
	stats_put_ctrl_stats);
	if (!ret && test_bit(ETHTOOL_STATS_RMON, req_info->stat_mask))
	ret = stats_put_stats(skb, data, ETHTOOL_STATS_RMON,
	ETH_SS_STATS_RMON, stats_put_rmon_stats);

	return ret;
	}

	const struct ethnl_request_ops ethnl_stats_request_ops = {
	.request_cmd = ETHTOOL_MSG_STATS_GET,
	.reply_cmd = ETHTOOL_MSG_STATS_GET_REPLY,
	.hdr_attr = ETHTOOL_A_STATS_HEADER,
	.req_info_size = sizeof(struct stats_req_info),
	.reply_data_size = sizeof(struct stats_reply_data),

	.parse_request = stats_parse_request,
	.prepare_data = stats_prepare_data,
	.reply_size = stats_reply_size,
	.fill_reply = stats_fill_reply,
	};

	static u64 ethtool_stats_sum(u64 a, u64 b)
	{
	if (a == ETHTOOL_STAT_NOT_SET)
	return b;
	if (b == ETHTOOL_STAT_NOT_SET)
	return a;
	return a + b;
	}

	/* Avoid modifying the aggregation procedure every time a new counter is added
	* by treating the structures as an array of u64 statistics.
	*/
	static void ethtool_aggregate_stats(void aggr_stats, const void emac_stats,
	const void *pmac_stats, size_t stats_size,
	size_t stats_offset)
	{
	size_t num_stats = stats_size / sizeof(u64);
	const u64 *s1 = emac_stats + stats_offset;
	const u64 *s2 = pmac_stats + stats_offset;
	u64 *s = aggr_stats + stats_offset;
	int i;

	for (i = 0; i < num_stats; i++)
	s[i] = ethtool_stats_sum(s1[i], s2[i]);
	}

	void ethtool_aggregate_mac_stats(struct net_device *dev,
	struct ethtool_eth_mac_stats *mac_stats)
	{
	const struct ethtool_ops *ops = dev->ethtool_ops;
	struct ethtool_eth_mac_stats pmac, emac;

	memset(&emac, 0xff, sizeof(emac));
	memset(&pmac, 0xff, sizeof(pmac));
	emac.src = ETHTOOL_MAC_STATS_SRC_EMAC;
	pmac.src = ETHTOOL_MAC_STATS_SRC_PMAC;

	ops->get_eth_mac_stats(dev, &emac);
	ops->get_eth_mac_stats(dev, &pmac);

	ethtool_aggregate_stats(mac_stats, &emac, &pmac,
	sizeof(mac_stats->stats),
	offsetof(struct ethtool_eth_mac_stats, stats));
	}
	EXPORT_SYMBOL(ethtool_aggregate_mac_stats);

	void ethtool_aggregate_phy_stats(struct net_device *dev,
	struct ethtool_eth_phy_stats *phy_stats)
	{
	const struct ethtool_ops *ops = dev->ethtool_ops;
	struct ethtool_eth_phy_stats pmac, emac;

	memset(&emac, 0xff, sizeof(emac));
	memset(&pmac, 0xff, sizeof(pmac));
	emac.src = ETHTOOL_MAC_STATS_SRC_EMAC;
	pmac.src = ETHTOOL_MAC_STATS_SRC_PMAC;

	ops->get_eth_phy_stats(dev, &emac);
	ops->get_eth_phy_stats(dev, &pmac);

	ethtool_aggregate_stats(phy_stats, &emac, &pmac,
	sizeof(phy_stats->stats),
	offsetof(struct ethtool_eth_phy_stats, stats));
	}
	EXPORT_SYMBOL(ethtool_aggregate_phy_stats);

	void ethtool_aggregate_ctrl_stats(struct net_device *dev,
	struct ethtool_eth_ctrl_stats *ctrl_stats)
	{
	const struct ethtool_ops *ops = dev->ethtool_ops;
	struct ethtool_eth_ctrl_stats pmac, emac;

	memset(&emac, 0xff, sizeof(emac));
	memset(&pmac, 0xff, sizeof(pmac));
	emac.src = ETHTOOL_MAC_STATS_SRC_EMAC;
	pmac.src = ETHTOOL_MAC_STATS_SRC_PMAC;

	ops->get_eth_ctrl_stats(dev, &emac);
	ops->get_eth_ctrl_stats(dev, &pmac);

	ethtool_aggregate_stats(ctrl_stats, &emac, &pmac,
	sizeof(ctrl_stats->stats),
	offsetof(struct ethtool_eth_ctrl_stats, stats));
	}
	EXPORT_SYMBOL(ethtool_aggregate_ctrl_stats);

	void ethtool_aggregate_pause_stats(struct net_device *dev,
	struct ethtool_pause_stats *pause_stats)
	{
	const struct ethtool_ops *ops = dev->ethtool_ops;
	struct ethtool_pause_stats pmac, emac;

	memset(&emac, 0xff, sizeof(emac));
	memset(&pmac, 0xff, sizeof(pmac));
	emac.src = ETHTOOL_MAC_STATS_SRC_EMAC;
	pmac.src = ETHTOOL_MAC_STATS_SRC_PMAC;

	ops->get_pause_stats(dev, &emac);
	ops->get_pause_stats(dev, &pmac);

	ethtool_aggregate_stats(pause_stats, &emac, &pmac,
	sizeof(pause_stats->stats),
	offsetof(struct ethtool_pause_stats, stats));
	}
	EXPORT_SYMBOL(ethtool_aggregate_pause_stats);

	void ethtool_aggregate_rmon_stats(struct net_device *dev,
	struct ethtool_rmon_stats *rmon_stats)
	{
	const struct ethtool_ops *ops = dev->ethtool_ops;
	const struct ethtool_rmon_hist_range *dummy;
	struct ethtool_rmon_stats pmac, emac;

	memset(&emac, 0xff, sizeof(emac));
	memset(&pmac, 0xff, sizeof(pmac));
	emac.src = ETHTOOL_MAC_STATS_SRC_EMAC;
	pmac.src = ETHTOOL_MAC_STATS_SRC_PMAC;

	ops->get_rmon_stats(dev, &emac, &dummy);
	ops->get_rmon_stats(dev, &pmac, &dummy);

	ethtool_aggregate_stats(rmon_stats, &emac, &pmac,
	sizeof(rmon_stats->stats),
	offsetof(struct ethtool_rmon_stats, stats));
	}
	EXPORT_SYMBOL(ethtool_aggregate_rmon_stats);