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Code Issues Releases Wiki Activity

virtio_net: Account for tx bytes and packets on sending xdp_frames 

Previously virtnet_xdp_xmit() did not account for device tx counters,
which caused confusions.
To be consistent with SKBs, account them on freeing xdp_frames.

Reported-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Toshiaki Makita 2019-01-31 20:40:30 +09:00 committed by David S. Miller
parent cfe4bd7a25
commit 546f28974d
1 changed files with 16 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
drivers/net/virtio_net.c
View File

@ -503,6 +503,8 @@ static int virtnet_xdp_xmit(struct net_device *dev,
struct bpf_prog *xdp_prog;
struct send_queue *sq;
unsigned int len;
int packets = 0;
int bytes = 0;
int drops = 0;
int kicks = 0;
int ret, err;
@ -526,10 +528,18 @@ static int virtnet_xdp_xmit(struct net_device *dev,
/* Free up any pending old buffers before queueing new ones. */
while ((ptr = virtqueue_get_buf(sq->vq, &len)) != NULL) {
if (likely(is_xdp_frame(ptr)))
xdp_return_frame(ptr_to_xdp(ptr));
else
napi_consume_skb(ptr, false);
if (likely(is_xdp_frame(ptr))) {
struct xdp_frame *frame = ptr_to_xdp(ptr);
bytes += frame->len;
xdp_return_frame(frame);
} else {
struct sk_buff *skb = ptr;
bytes += skb->len;
napi_consume_skb(skb, false);
}
packets++;
}
for (i = 0; i < n; i++) {
@ -549,6 +559,8 @@ static int virtnet_xdp_xmit(struct net_device *dev,
}
out:
u64_stats_update_begin(&sq->stats.syncp);
sq->stats.bytes += bytes;
sq->stats.packets += packets;
sq->stats.xdp_tx += n;
sq->stats.xdp_tx_drops += drops;
sq->stats.kicks += kicks;