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Commit 5fe6e567 authored by Lorenzo Bianconi's avatar Lorenzo Bianconi Committed by David S. Miller
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veth: rely on peer veth_rq for ndo_xdp_xmit accounting 

Rely on 'remote' veth_rq to account ndo_xdp_xmit ethtool counters.
Move XDP_TX accounting to veth_xdp_flush_bq routine.
Remove 'rx' prefix in rx xdp ethool counters
Signed-off-by: default avatarLorenzo Bianconi <lorenzo@kernel.org>
Acked-by: default avatarToshiaki Makita <toshiaki.makita1@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent bd32aa1f
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Showing with 82 additions and 47 deletions
drivers/net/veth.c
View file @ 5fe6e567
......@@ -45,8 +45,8 @@ struct veth_stats {
u64 xdp_drops;
u64 xdp_tx;
u64 xdp_tx_err;
u64 xdp_xmit;
u64 xdp_xmit_err;
u64 peer_tq_xdp_xmit;
u64 peer_tq_xdp_xmit_err;
};
struct veth_rq_stats {
......@@ -92,17 +92,22 @@ struct veth_q_stat_desc {
static const struct veth_q_stat_desc veth_rq_stats_desc[] = {
{ "xdp_packets", VETH_RQ_STAT(xdp_packets) },
{ "xdp_bytes", VETH_RQ_STAT(xdp_bytes) },
{ "rx_drops", VETH_RQ_STAT(rx_drops) },
{ "rx_xdp_redirect", VETH_RQ_STAT(xdp_redirect) },
{ "rx_xdp_drops", VETH_RQ_STAT(xdp_drops) },
{ "rx_xdp_tx", VETH_RQ_STAT(xdp_tx) },
{ "rx_xdp_tx_errors", VETH_RQ_STAT(xdp_tx_err) },
{ "tx_xdp_xmit", VETH_RQ_STAT(xdp_xmit) },
{ "tx_xdp_xmit_errors", VETH_RQ_STAT(xdp_xmit_err) },
{ "drops", VETH_RQ_STAT(rx_drops) },
{ "xdp_redirect", VETH_RQ_STAT(xdp_redirect) },
{ "xdp_drops", VETH_RQ_STAT(xdp_drops) },
{ "xdp_tx", VETH_RQ_STAT(xdp_tx) },
{ "xdp_tx_errors", VETH_RQ_STAT(xdp_tx_err) },
};
#define VETH_RQ_STATS_LEN ARRAY_SIZE(veth_rq_stats_desc)
static const struct veth_q_stat_desc veth_tq_stats_desc[] = {
{ "xdp_xmit", VETH_RQ_STAT(peer_tq_xdp_xmit) },
{ "xdp_xmit_errors", VETH_RQ_STAT(peer_tq_xdp_xmit_err) },
};
#define VETH_TQ_STATS_LEN ARRAY_SIZE(veth_tq_stats_desc)
static struct {
const char string[ETH_GSTRING_LEN];
} ethtool_stats_keys[] = {
......@@ -142,6 +147,14 @@ static void veth_get_strings(struct net_device *dev, u32 stringset, u8 *buf)
p += ETH_GSTRING_LEN;
}
}
for (i = 0; i < dev->real_num_tx_queues; i++) {
for (j = 0; j < VETH_TQ_STATS_LEN; j++) {
snprintf(p, ETH_GSTRING_LEN,
"tx_queue_%u_%.18s",
i, veth_tq_stats_desc[j].desc);
p += ETH_GSTRING_LEN;
}
}
break;
}
}
......@@ -151,7 +164,8 @@ static int veth_get_sset_count(struct net_device *dev, int sset)
switch (sset) {
case ETH_SS_STATS:
return ARRAY_SIZE(ethtool_stats_keys) +
VETH_RQ_STATS_LEN * dev->real_num_rx_queues;
VETH_RQ_STATS_LEN * dev->real_num_rx_queues +
VETH_TQ_STATS_LEN * dev->real_num_tx_queues;
default:
return -EOPNOTSUPP;
}
......@@ -160,7 +174,7 @@ static int veth_get_sset_count(struct net_device *dev, int sset)
static void veth_get_ethtool_stats(struct net_device *dev,
struct ethtool_stats *stats, u64 *data)
{
struct veth_priv *priv = netdev_priv(dev);
struct veth_priv *rcv_priv, *priv = netdev_priv(dev);
struct net_device *peer = rtnl_dereference(priv->peer);
int i, j, idx;
......@@ -181,6 +195,26 @@ static void veth_get_ethtool_stats(struct net_device *dev,
} while (u64_stats_fetch_retry_irq(&rq_stats->syncp, start));
idx += VETH_RQ_STATS_LEN;
}
if (!peer)
return;
rcv_priv = netdev_priv(peer);
for (i = 0; i < peer->real_num_rx_queues; i++) {
const struct veth_rq_stats *rq_stats = &rcv_priv->rq[i].stats;
const void *base = (void *)&rq_stats->vs;
unsigned int start, tx_idx = idx;
size_t offset;
tx_idx += (i % dev->real_num_tx_queues) * VETH_TQ_STATS_LEN;
do {
start = u64_stats_fetch_begin_irq(&rq_stats->syncp);
for (j = 0; j < VETH_TQ_STATS_LEN; j++) {
offset = veth_tq_stats_desc[j].offset;
data[tx_idx + j] += *(u64 *)(base + offset);
}
} while (u64_stats_fetch_retry_irq(&rq_stats->syncp, start));
}
}
static const struct ethtool_ops veth_ethtool_ops = {
......@@ -301,25 +335,25 @@ static void veth_stats_rx(struct veth_stats *result, struct net_device *dev)
struct veth_priv *priv = netdev_priv(dev);
int i;
result->xdp_xmit_err = 0;
result->peer_tq_xdp_xmit_err = 0;
result->xdp_packets = 0;
result->xdp_tx_err = 0;
result->xdp_bytes = 0;
result->rx_drops = 0;
for (i = 0; i < dev->num_rx_queues; i++) {
u64 packets, bytes, drops, xdp_tx_err, xdp_xmit_err;
u64 packets, bytes, drops, xdp_tx_err, peer_tq_xdp_xmit_err;
struct veth_rq_stats *stats = &priv->rq[i].stats;
unsigned int start;
do {
start = u64_stats_fetch_begin_irq(&stats->syncp);
xdp_xmit_err = stats->vs.xdp_xmit_err;
peer_tq_xdp_xmit_err = stats->vs.peer_tq_xdp_xmit_err;
xdp_tx_err = stats->vs.xdp_tx_err;
packets = stats->vs.xdp_packets;
bytes = stats->vs.xdp_bytes;
drops = stats->vs.rx_drops;
} while (u64_stats_fetch_retry_irq(&stats->syncp, start));
result->xdp_xmit_err += xdp_xmit_err;
result->peer_tq_xdp_xmit_err += peer_tq_xdp_xmit_err;
result->xdp_tx_err += xdp_tx_err;
result->xdp_packets += packets;
result->xdp_bytes += bytes;
......@@ -340,8 +374,8 @@ static void veth_get_stats64(struct net_device *dev,
tot->tx_packets = packets;
veth_stats_rx(&rx, dev);
tot->tx_dropped += rx.xdp_xmit_err + rx.xdp_tx_err;
tot->rx_dropped = rx.rx_drops;
tot->tx_dropped += rx.xdp_tx_err;
tot->rx_dropped = rx.rx_drops + rx.peer_tq_xdp_xmit_err;
tot->rx_bytes = rx.xdp_bytes;
tot->rx_packets = rx.xdp_packets;
......@@ -353,7 +387,8 @@ static void veth_get_stats64(struct net_device *dev,
tot->rx_packets += packets;
veth_stats_rx(&rx, peer);
tot->rx_dropped += rx.xdp_xmit_err + rx.xdp_tx_err;
tot->tx_dropped += rx.peer_tq_xdp_xmit_err;
tot->rx_dropped += rx.xdp_tx_err;
tot->tx_bytes += rx.xdp_bytes;
tot->tx_packets += rx.xdp_packets;
}
......@@ -394,38 +429,28 @@ static int veth_xdp_xmit(struct net_device *dev, int n,
u32 flags, bool ndo_xmit)
{
struct veth_priv *rcv_priv, *priv = netdev_priv(dev);
unsigned int qidx, max_len;
int i, ret = -ENXIO, drops = 0;
struct net_device *rcv;
int i, ret, drops = n;
unsigned int max_len;
struct veth_rq *rq;
rcu_read_lock();
if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK)) {
rcu_read_unlock();
atomic64_add(drops, &priv->dropped);
if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK))
return -EINVAL;
}
rcu_read_lock();
rcv = rcu_dereference(priv->peer);
if (unlikely(!rcv)) {
rcu_read_unlock();
atomic64_add(drops, &priv->dropped);
return -ENXIO;
}
if (unlikely(!rcv))
goto out;
rcv_priv = netdev_priv(rcv);
qidx = veth_select_rxq(rcv);
rq = &rcv_priv->rq[qidx];
rq = &rcv_priv->rq[veth_select_rxq(rcv)];
/* Non-NULL xdp_prog ensures that xdp_ring is initialized on receive
* side. This means an XDP program is loaded on the peer and the peer
* device is up.
*/
if (!rcu_access_pointer(rq->xdp_prog)) {
ret = -ENXIO;
goto drop;
}
if (!rcu_access_pointer(rq->xdp_prog))
goto out;
drops = 0;
max_len = rcv->mtu + rcv->hard_header_len + VLAN_HLEN;
spin_lock(&rq->xdp_ring.producer_lock);
......@@ -445,18 +470,14 @@ static int veth_xdp_xmit(struct net_device *dev, int n,
__veth_xdp_flush(rq);
ret = n - drops;
drop:
rq = &priv->rq[qidx];
u64_stats_update_begin(&rq->stats.syncp);
if (ndo_xmit) {
rq->stats.vs.xdp_xmit += n - drops;
rq->stats.vs.xdp_xmit_err += drops;
} else {
rq->stats.vs.xdp_tx += n - drops;
rq->stats.vs.xdp_tx_err += drops;
u64_stats_update_begin(&rq->stats.syncp);
rq->stats.vs.peer_tq_xdp_xmit += n - drops;
rq->stats.vs.peer_tq_xdp_xmit_err += drops;
u64_stats_update_end(&rq->stats.syncp);
}
u64_stats_update_end(&rq->stats.syncp);
out:
rcu_read_unlock();
return ret;
......@@ -465,7 +486,16 @@ static int veth_xdp_xmit(struct net_device *dev, int n,
static int veth_ndo_xdp_xmit(struct net_device *dev, int n,
struct xdp_frame **frames, u32 flags)
{
return veth_xdp_xmit(dev, n, frames, flags, true);
int err;
err = veth_xdp_xmit(dev, n, frames, flags, true);
if (err < 0) {
struct veth_priv *priv = netdev_priv(dev);
atomic64_add(n, &priv->dropped);
}
return err;
}
static void veth_xdp_flush_bq(struct veth_rq *rq, struct veth_xdp_tx_bq *bq)
......@@ -481,6 +511,11 @@ static void veth_xdp_flush_bq(struct veth_rq *rq, struct veth_xdp_tx_bq *bq)
}
trace_xdp_bulk_tx(rq->dev, sent, bq->count - sent, err);
u64_stats_update_begin(&rq->stats.syncp);
rq->stats.vs.xdp_tx += sent;
rq->stats.vs.xdp_tx_err += bq->count - sent;
u64_stats_update_end(&rq->stats.syncp);
bq->count = 0;
}
......
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