Re: [PATCH] virtio_net: fix rx_drops stat for small pkts
From: Jason Wang <hidden>
Date: 2021-12-16 03:23:59
Also in:
lkml, netdev
On Thu, Dec 16, 2021 at 11:12 AM Wenliang Wang [off-list ref] wrote:
We found the stat of rx drops for small pkts does not increment when build_skb fail, it's not coherent with other mode's rx drops stat. Signed-off-by: Wenliang Wang <redacted>
Acked-by: Jason Wang <redacted>
quoted hunk
--- drivers/net/virtio_net.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-)diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 55db6a336f7e..b107835242ad 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c@@ -733,7 +733,7 @@ static struct sk_buff *receive_small(struct net_device *dev, pr_debug("%s: rx error: len %u exceeds max size %d\n", dev->name, len, GOOD_PACKET_LEN); dev->stats.rx_length_errors++; - goto err_len; + goto err; } if (likely(!vi->xdp_enabled)) {@@ -825,10 +825,8 @@ static struct sk_buff *receive_small(struct net_device *dev, skip_xdp: skb = build_skb(buf, buflen); - if (!skb) { - put_page(page); + if (!skb) goto err; - } skb_reserve(skb, headroom - delta); skb_put(skb, len); if (!xdp_prog) {@@ -839,13 +837,12 @@ static struct sk_buff *receive_small(struct net_device *dev, if (metasize) skb_metadata_set(skb, metasize); -err: return skb; err_xdp: rcu_read_unlock(); stats->xdp_drops++; -err_len: +err: stats->drops++; put_page(page); xdp_xmit: --2.30.2
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