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Date: Tue, 24 Jan 2017 13:06:13 -0800
From: Stephen Hemminger <stephen@...workplumber.org>
To: davem@...emloft.net, kys@...rosoft.com
Cc: netdev@...r.kernel.org, Stephen Hemminger <sthemmin@...rosoft.com>,
Simon Xiao <sixiao@...rosoft.com>
Subject: [PATCH 16/18] netvsc: report per-channel stats in ethtool statistics
From: Simon Xiao <sixiao@...rosoft.com>
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: Long Li <longli@...rosoft.com>
Reviewed-by: K. Y. Srinivasan <kys@...rosoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@...rosoft.com>
Signed-off-by: Simon Xiao <sixiao@...rosoft.com>
Signed-off-by: Stephen Hemminger <sthemmin@...rosoft.com>
---
drivers/net/hyperv/hyperv_net.h | 5 +-
drivers/net/hyperv/netvsc.c | 2 +-
drivers/net/hyperv/netvsc_drv.c | 143 +++++++++++++++++++++++++---------------
3 files changed, 93 insertions(+), 57 deletions(-)
diff --git a/drivers/net/hyperv/hyperv_net.h b/drivers/net/hyperv/hyperv_net.h
index 340f64233e2a..d3e73ac158ae 100644
--- a/drivers/net/hyperv/hyperv_net.h
+++ b/drivers/net/hyperv/hyperv_net.h
@@ -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 */
diff --git a/drivers/net/hyperv/netvsc.c b/drivers/net/hyperv/netvsc.c
index 397aa1d88a6f..c70c4ac77b74 100644
--- a/drivers/net/hyperv/netvsc.c
+++ b/drivers/net/hyperv/netvsc.c
@@ -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;
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c
index 1dd13da79f02..fe0df72532a3 100644
--- a/drivers/net/hyperv/netvsc_drv.c
+++ b/drivers/net/hyperv/netvsc_drv.c
@@ -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));
-
- t->tx_bytes += tx_bytes;
- t->tx_packets += tx_packets;
- t->rx_bytes += rx_bytes;
- t->rx_packets += rx_packets;
- t->multicast += rx_multicast;
+ 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->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 @@ static void netvsc_link_change(struct work_struct *w)
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;
}
--
2.11.0
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