[PATCH net-next 2/2] virtio-net: get rid of unnecessary container of rq stats
From: Jason Wang
Date: Tue Jul 31 2018 - 05:43:54 EST
We don't maintain tx counters in rx stats any more. There's no need
for an extra container of rq stats.
Cc: Toshiaki Makita <makita.toshiaki@xxxxxxxxxxxxx>
Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx>
---
drivers/net/virtio_net.c | 80 ++++++++++++++++++++++--------------------------
1 file changed, 36 insertions(+), 44 deletions(-)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 72d3f68..14f661c 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -87,7 +87,8 @@ struct virtnet_sq_stats {
u64 kicks;
};
-struct virtnet_rq_stat_items {
+struct virtnet_rq_stats {
+ struct u64_stats_sync syncp;
u64 packets;
u64 bytes;
u64 drops;
@@ -98,17 +99,8 @@ struct virtnet_rq_stat_items {
u64 kicks;
};
-struct virtnet_rq_stats {
- struct u64_stats_sync syncp;
- struct virtnet_rq_stat_items items;
-};
-
-struct virtnet_rx_stats {
- struct virtnet_rq_stat_items rx;
-};
-
#define VIRTNET_SQ_STAT(m) offsetof(struct virtnet_sq_stats, m)
-#define VIRTNET_RQ_STAT(m) offsetof(struct virtnet_rq_stat_items, m)
+#define VIRTNET_RQ_STAT(m) offsetof(struct virtnet_rq_stats, m)
static const struct virtnet_stat_desc virtnet_sq_stats_desc[] = {
{ "packets", VIRTNET_SQ_STAT(packets) },
@@ -617,7 +609,7 @@ static struct sk_buff *receive_small(struct net_device *dev,
void *buf, void *ctx,
unsigned int len,
unsigned int *xdp_xmit,
- struct virtnet_rx_stats *stats)
+ struct virtnet_rq_stats *stats)
{
struct sk_buff *skb;
struct bpf_prog *xdp_prog;
@@ -632,7 +624,7 @@ static struct sk_buff *receive_small(struct net_device *dev,
int err;
len -= vi->hdr_len;
- stats->rx.bytes += len;
+ stats->bytes += len;
rcu_read_lock();
xdp_prog = rcu_dereference(rq->xdp_prog);
@@ -674,7 +666,7 @@ static struct sk_buff *receive_small(struct net_device *dev,
xdp.rxq = &rq->xdp_rxq;
orig_data = xdp.data;
act = bpf_prog_run_xdp(xdp_prog, &xdp);
- stats->rx.xdp_packets++;
+ stats->xdp_packets++;
switch (act) {
case XDP_PASS:
@@ -683,7 +675,7 @@ static struct sk_buff *receive_small(struct net_device *dev,
len = xdp.data_end - xdp.data;
break;
case XDP_TX:
- stats->rx.xdp_tx++;
+ stats->xdp_tx++;
xdpf = convert_to_xdp_frame(&xdp);
if (unlikely(!xdpf))
goto err_xdp;
@@ -696,7 +688,7 @@ static struct sk_buff *receive_small(struct net_device *dev,
rcu_read_unlock();
goto xdp_xmit;
case XDP_REDIRECT:
- stats->rx.xdp_redirects++;
+ stats->xdp_redirects++;
err = xdp_do_redirect(dev, &xdp, xdp_prog);
if (err)
goto err_xdp;
@@ -730,8 +722,8 @@ static struct sk_buff *receive_small(struct net_device *dev,
err_xdp:
rcu_read_unlock();
- stats->rx.xdp_drops++;
- stats->rx.drops++;
+ stats->xdp_drops++;
+ stats->drops++;
put_page(page);
xdp_xmit:
return NULL;
@@ -742,19 +734,19 @@ static struct sk_buff *receive_big(struct net_device *dev,
struct receive_queue *rq,
void *buf,
unsigned int len,
- struct virtnet_rx_stats *stats)
+ struct virtnet_rq_stats *stats)
{
struct page *page = buf;
struct sk_buff *skb = page_to_skb(vi, rq, page, 0, len, PAGE_SIZE);
- stats->rx.bytes += len - vi->hdr_len;
+ stats->bytes += len - vi->hdr_len;
if (unlikely(!skb))
goto err;
return skb;
err:
- stats->rx.drops++;
+ stats->drops++;
give_pages(rq, page);
return NULL;
}
@@ -766,7 +758,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
void *ctx,
unsigned int len,
unsigned int *xdp_xmit,
- struct virtnet_rx_stats *stats)
+ struct virtnet_rq_stats *stats)
{
struct virtio_net_hdr_mrg_rxbuf *hdr = buf;
u16 num_buf = virtio16_to_cpu(vi->vdev, hdr->num_buffers);
@@ -779,7 +771,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
int err;
head_skb = NULL;
- stats->rx.bytes += len - vi->hdr_len;
+ stats->bytes += len - vi->hdr_len;
rcu_read_lock();
xdp_prog = rcu_dereference(rq->xdp_prog);
@@ -828,7 +820,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
xdp.rxq = &rq->xdp_rxq;
act = bpf_prog_run_xdp(xdp_prog, &xdp);
- stats->rx.xdp_packets++;
+ stats->xdp_packets++;
switch (act) {
case XDP_PASS:
@@ -853,7 +845,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
}
break;
case XDP_TX:
- stats->rx.xdp_tx++;
+ stats->xdp_tx++;
xdpf = convert_to_xdp_frame(&xdp);
if (unlikely(!xdpf))
goto err_xdp;
@@ -870,7 +862,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
rcu_read_unlock();
goto xdp_xmit;
case XDP_REDIRECT:
- stats->rx.xdp_redirects++;
+ stats->xdp_redirects++;
err = xdp_do_redirect(dev, &xdp, xdp_prog);
if (err) {
if (unlikely(xdp_page != page))
@@ -920,7 +912,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
goto err_buf;
}
- stats->rx.bytes += len;
+ stats->bytes += len;
page = virt_to_head_page(buf);
truesize = mergeable_ctx_to_truesize(ctx);
@@ -966,7 +958,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
err_xdp:
rcu_read_unlock();
- stats->rx.xdp_drops++;
+ stats->xdp_drops++;
err_skb:
put_page(page);
while (num_buf-- > 1) {
@@ -977,12 +969,12 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
dev->stats.rx_length_errors++;
break;
}
- stats->rx.bytes += len;
+ stats->bytes += len;
page = virt_to_head_page(buf);
put_page(page);
}
err_buf:
- stats->rx.drops++;
+ stats->drops++;
dev_kfree_skb(head_skb);
xdp_xmit:
return NULL;
@@ -991,7 +983,7 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
static void receive_buf(struct virtnet_info *vi, struct receive_queue *rq,
void *buf, unsigned int len, void **ctx,
unsigned int *xdp_xmit,
- struct virtnet_rx_stats *stats)
+ struct virtnet_rq_stats *stats)
{
struct net_device *dev = vi->dev;
struct sk_buff *skb;
@@ -1212,7 +1204,7 @@ static bool try_fill_recv(struct virtnet_info *vi, struct receive_queue *rq,
} while (rq->vq->num_free);
if (virtqueue_kick_prepare(rq->vq) && virtqueue_notify(rq->vq)) {
u64_stats_update_begin(&rq->stats.syncp);
- rq->stats.items.kicks++;
+ rq->stats.kicks++;
u64_stats_update_end(&rq->stats.syncp);
}
@@ -1290,7 +1282,7 @@ static int virtnet_receive(struct receive_queue *rq, int budget,
unsigned int *xdp_xmit)
{
struct virtnet_info *vi = rq->vq->vdev->priv;
- struct virtnet_rx_stats stats = {};
+ struct virtnet_rq_stats stats = {};
unsigned int len;
void *buf;
int i;
@@ -1298,16 +1290,16 @@ static int virtnet_receive(struct receive_queue *rq, int budget,
if (!vi->big_packets || vi->mergeable_rx_bufs) {
void *ctx;
- while (stats.rx.packets < budget &&
+ while (stats.packets < budget &&
(buf = virtqueue_get_buf_ctx(rq->vq, &len, &ctx))) {
receive_buf(vi, rq, buf, len, ctx, xdp_xmit, &stats);
- stats.rx.packets++;
+ stats.packets++;
}
} else {
- while (stats.rx.packets < budget &&
+ while (stats.packets < budget &&
(buf = virtqueue_get_buf(rq->vq, &len)) != NULL) {
receive_buf(vi, rq, buf, len, NULL, xdp_xmit, &stats);
- stats.rx.packets++;
+ stats.packets++;
}
}
@@ -1321,12 +1313,12 @@ static int virtnet_receive(struct receive_queue *rq, int budget,
size_t offset = virtnet_rq_stats_desc[i].offset;
u64 *item;
- item = (u64 *)((u8 *)&rq->stats.items + offset);
- *item += *(u64 *)((u8 *)&stats.rx + offset);
+ item = (u64 *)((u8 *)&rq->stats + offset);
+ *item += *(u64 *)((u8 *)&stats + offset);
}
u64_stats_update_end(&rq->stats.syncp);
- return stats.rx.packets;
+ return stats.packets;
}
static void free_old_xmit_skbs(struct send_queue *sq)
@@ -1686,9 +1678,9 @@ static void virtnet_stats(struct net_device *dev,
do {
start = u64_stats_fetch_begin_irq(&rq->stats.syncp);
- rpackets = rq->stats.items.packets;
- rbytes = rq->stats.items.bytes;
- rdrops = rq->stats.items.drops;
+ rpackets = rq->stats.packets;
+ rbytes = rq->stats.bytes;
+ rdrops = rq->stats.drops;
} while (u64_stats_fetch_retry_irq(&rq->stats.syncp, start));
tot->rx_packets += rpackets;
@@ -2078,7 +2070,7 @@ static void virtnet_get_ethtool_stats(struct net_device *dev,
for (i = 0; i < vi->curr_queue_pairs; i++) {
struct receive_queue *rq = &vi->rq[i];
- stats_base = (u8 *)&rq->stats.items;
+ stats_base = (u8 *)&rq->stats;
do {
start = u64_stats_fetch_begin_irq(&rq->stats.syncp);
for (j = 0; j < VIRTNET_RQ_STATS_LEN; j++) {
--
2.7.4