Commit 6c80f3fc authored by Simon Xiao's avatar Simon Xiao Committed by David S. Miller
Browse files

netvsc: report per-channel stats in ethtool statistics 



Report packets and bytes transferred through a vmbus channel via ethtool.
This supersedes need for per-cpu statistics.

Example:
$ ethtool -S eth0
NIC statistics:
...
     tx_queue_0_packets: 3523179
     tx_queue_0_bytes: 505370920
     rx_queue_0_packets: 41430490
     rx_queue_0_bytes: 62714661254
     tx_queue_1_packets: 0
     tx_queue_1_bytes: 0
     rx_queue_1_packets: 0
     rx_queue_1_bytes: 0
...

Reviewed-by: default avatarLong Li <longli@microsoft.com>
Reviewed-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: default avatarSimon Xiao <sixiao@microsoft.com>
Signed-off-by: default avatarStephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 793e3955

drivers/net/hyperv/hyperv_net.h

+3 −2
Original line number Diff line number Diff line
@@ -699,8 +699,6 @@ struct net_device_context { 
	u32 msg_enable; /* debug level */



	u32 tx_checksum_mask;

	struct netvsc_stats __percpu *tx_stats;

	struct netvsc_stats __percpu *rx_stats;



	/* Ethtool settings */

	u8 duplex;
@@ -725,6 +723,9 @@ struct netvsc_channel { 
	struct multi_send_data msd;

	struct multi_recv_comp mrc;

	atomic_t queue_sends;



	struct netvsc_stats tx_stats;

	struct netvsc_stats rx_stats;

};



/* Per netvsc device */

drivers/net/hyperv/netvsc.c

+1 −1
Original line number Diff line number Diff line
@@ -621,7 +621,7 @@ static void netvsc_send_tx_complete(struct netvsc_device *net_device, 
		q_idx = packet->q_idx;

		channel = incoming_channel;



		tx_stats = this_cpu_ptr(net_device_ctx->tx_stats);

		tx_stats = &net_device->chan_table[q_idx].tx_stats;



		u64_stats_update_begin(&tx_stats->syncp);

		tx_stats->packets += packet->total_packets;

drivers/net/hyperv/netvsc_drv.c

+89 −54
Original line number Diff line number Diff line
@@ -641,9 +641,12 @@ int netvsc_recv_callback(struct net_device *net, 
			 const struct ndis_pkt_8021q_info *vlan)

{

	struct net_device_context *net_device_ctx = netdev_priv(net);

	struct netvsc_device *net_device = net_device_ctx->nvdev;

	struct net_device *vf_netdev;

	struct sk_buff *skb;

	struct netvsc_stats *rx_stats;

	u16 q_idx = channel->offermsg.offer.sub_channel_index;





	if (net->reg_state != NETREG_REGISTERED)

		return NVSP_STAT_FAIL;
@@ -669,15 +672,14 @@ int netvsc_recv_callback(struct net_device *net, 
	}



	if (net != vf_netdev)

		skb_record_rx_queue(skb,

				    channel->offermsg.offer.sub_channel_index);

		skb_record_rx_queue(skb, q_idx);



	/*

	 * Even if injecting the packet, record the statistics

	 * on the synthetic device because modifying the VF device

	 * statistics will not work correctly.

	 */

	rx_stats = this_cpu_ptr(net_device_ctx->rx_stats);

	rx_stats = &net_device->chan_table[q_idx].rx_stats;

	u64_stats_update_begin(&rx_stats->syncp);

	rx_stats->packets++;

	rx_stats->bytes += len;
@@ -882,34 +884,39 @@ static void netvsc_get_stats64(struct net_device *net, 
			       struct rtnl_link_stats64 *t)

{

	struct net_device_context *ndev_ctx = netdev_priv(net);

	int cpu;



	for_each_possible_cpu(cpu) {

		struct netvsc_stats *tx_stats = per_cpu_ptr(ndev_ctx->tx_stats,

							    cpu);

		struct netvsc_stats *rx_stats = per_cpu_ptr(ndev_ctx->rx_stats,

							    cpu);

		u64 tx_packets, tx_bytes, rx_packets, rx_bytes, rx_multicast;

	struct netvsc_device *nvdev = ndev_ctx->nvdev;

	int i;



	if (!nvdev)

		return;



	for (i = 0; i < nvdev->num_chn; i++) {

		const struct netvsc_channel *nvchan = &nvdev->chan_table[i];

		const struct netvsc_stats *stats;

		u64 packets, bytes, multicast;

		unsigned int start;



		stats = &nvchan->tx_stats;

		do {

			start = u64_stats_fetch_begin_irq(&tx_stats->syncp);

			tx_packets = tx_stats->packets;

			tx_bytes = tx_stats->bytes;

		} while (u64_stats_fetch_retry_irq(&tx_stats->syncp, start));

			start = u64_stats_fetch_begin_irq(&stats->syncp);

			packets = stats->packets;

			bytes = stats->bytes;

		} while (u64_stats_fetch_retry_irq(&stats->syncp, start));



		t->tx_bytes	+= bytes;

		t->tx_packets	+= packets;



		stats = &nvchan->rx_stats;

		do {

			start = u64_stats_fetch_begin_irq(&rx_stats->syncp);

			rx_packets = rx_stats->packets;

			rx_bytes = rx_stats->bytes;

			rx_multicast = rx_stats->multicast + rx_stats->broadcast;

		} while (u64_stats_fetch_retry_irq(&rx_stats->syncp, start));

			start = u64_stats_fetch_begin_irq(&stats->syncp);

			packets = stats->packets;

			bytes = stats->bytes;

			multicast = stats->multicast + stats->broadcast;

		} while (u64_stats_fetch_retry_irq(&stats->syncp, start));



		t->tx_bytes	+= tx_bytes;

		t->tx_packets	+= tx_packets;

		t->rx_bytes	+= rx_bytes;

		t->rx_packets	+= rx_packets;

		t->multicast	+= rx_multicast;

		t->rx_bytes	+= bytes;

		t->rx_packets	+= packets;

		t->multicast	+= multicast;

	}



	t->tx_dropped	= net->stats.tx_dropped;
@@ -954,11 +961,19 @@ static const struct { 
	{ "tx_busy",	  offsetof(struct netvsc_ethtool_stats, tx_busy) },

};



#define NETVSC_GLOBAL_STATS_LEN	ARRAY_SIZE(netvsc_stats)



/* 4 statistics per queue (rx/tx packets/bytes) */

#define NETVSC_QUEUE_STATS_LEN(dev) ((dev)->num_chn * 4)



static int netvsc_get_sset_count(struct net_device *dev, int string_set)

{

	struct net_device_context *ndc = netdev_priv(dev);

	struct netvsc_device *nvdev = ndc->nvdev;



	switch (string_set) {

	case ETH_SS_STATS:

		return ARRAY_SIZE(netvsc_stats);

		return NETVSC_GLOBAL_STATS_LEN + NETVSC_QUEUE_STATS_LEN(nvdev);

	default:

		return -EINVAL;

	}
@@ -968,22 +983,63 @@ static void netvsc_get_ethtool_stats(struct net_device *dev, 
				     struct ethtool_stats *stats, u64 *data)

{

	struct net_device_context *ndc = netdev_priv(dev);

	struct netvsc_device *nvdev = ndc->nvdev;

	const void *nds = &ndc->eth_stats;

	int i;

	const struct netvsc_stats *qstats;

	unsigned int start;

	u64 packets, bytes;

	int i, j;



	for (i = 0; i < ARRAY_SIZE(netvsc_stats); i++)

	for (i = 0; i < NETVSC_GLOBAL_STATS_LEN; i++)

		data[i] = *(unsigned long *)(nds + netvsc_stats[i].offset);



	for (j = 0; j < nvdev->num_chn; j++) {

		qstats = &nvdev->chan_table[j].tx_stats;



		do {

			start = u64_stats_fetch_begin_irq(&qstats->syncp);

			packets = qstats->packets;

			bytes = qstats->bytes;

		} while (u64_stats_fetch_retry_irq(&qstats->syncp, start));

		data[i++] = packets;

		data[i++] = bytes;



		qstats = &nvdev->chan_table[j].rx_stats;

		do {

			start = u64_stats_fetch_begin_irq(&qstats->syncp);

			packets = qstats->packets;

			bytes = qstats->bytes;

		} while (u64_stats_fetch_retry_irq(&qstats->syncp, start));

		data[i++] = packets;

		data[i++] = bytes;

	}

}



static void netvsc_get_strings(struct net_device *dev, u32 stringset, u8 *data)

{

	struct net_device_context *ndc = netdev_priv(dev);

	struct netvsc_device *nvdev = ndc->nvdev;

	u8 *p = data;

	int i;



	switch (stringset) {

	case ETH_SS_STATS:

		for (i = 0; i < ARRAY_SIZE(netvsc_stats); i++)

			memcpy(data + i * ETH_GSTRING_LEN,

			memcpy(p + i * ETH_GSTRING_LEN,

			       netvsc_stats[i].name, ETH_GSTRING_LEN);



		p += i * ETH_GSTRING_LEN;

		for (i = 0; i < nvdev->num_chn; i++) {

			sprintf(p, "tx_queue_%u_packets", i);

			p += ETH_GSTRING_LEN;

			sprintf(p, "tx_queue_%u_bytes", i);

			p += ETH_GSTRING_LEN;

			sprintf(p, "rx_queue_%u_packets", i);

			p += ETH_GSTRING_LEN;

			sprintf(p, "rx_queue_%u_bytes", i);

			p += ETH_GSTRING_LEN;

		}



		break;

	}

}
@@ -1237,15 +1293,6 @@ out_unlock: 
	rtnl_unlock();

}



static void netvsc_free_netdev(struct net_device *netdev)

{

	struct net_device_context *net_device_ctx = netdev_priv(netdev);



	free_percpu(net_device_ctx->tx_stats);

	free_percpu(net_device_ctx->rx_stats);

	free_netdev(netdev);

}



static struct net_device *get_netvsc_bymac(const u8 *mac)

{

	struct net_device *dev;
@@ -1423,18 +1470,6 @@ static int netvsc_probe(struct hv_device *dev, 
		netdev_dbg(net, "netvsc msg_enable: %d\n",

			   net_device_ctx->msg_enable);



	net_device_ctx->tx_stats = netdev_alloc_pcpu_stats(struct netvsc_stats);

	if (!net_device_ctx->tx_stats) {

		free_netdev(net);

		return -ENOMEM;

	}

	net_device_ctx->rx_stats = netdev_alloc_pcpu_stats(struct netvsc_stats);

	if (!net_device_ctx->rx_stats) {

		free_percpu(net_device_ctx->tx_stats);

		free_netdev(net);

		return -ENOMEM;

	}



	hv_set_drvdata(dev, net);



	net_device_ctx->start_remove = false;
@@ -1460,7 +1495,7 @@ static int netvsc_probe(struct hv_device *dev, 
	ret = rndis_filter_device_add(dev, &device_info);

	if (ret != 0) {

		netdev_err(net, "unable to add netvsc device (ret %d)\n", ret);

		netvsc_free_netdev(net);

		free_netdev(net);

		hv_set_drvdata(dev, NULL);

		return ret;

	}
@@ -1487,7 +1522,7 @@ static int netvsc_probe(struct hv_device *dev, 
	if (ret != 0) {

		pr_err("Unable to register netdev.\n");

		rndis_filter_device_remove(dev, nvdev);

		netvsc_free_netdev(net);

		free_netdev(net);

	}



	return ret;
@@ -1530,7 +1565,7 @@ static int netvsc_remove(struct hv_device *dev) 


	hv_set_drvdata(dev, NULL);



	netvsc_free_netdev(net);

	free_netdev(net);

	return 0;

}

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