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veth: Fixing transmit return status for dropped packets

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[ Upstream commit 151e887d8ff97e2e42110ffa1fb1e6a2128fb364 ]

The veth_xmit function returns NETDEV_TX_OK even when packets are dropped.
This behavior leads to incorrect calculations of statistics counts, as
well as things like txq->trans_start updates.

Fixes: e314dbdc1c0d ("[NET]: Virtual ethernet device driver.")
Signed-off-by: Liang Chen <liangchen.linux@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Liang Chen 2023-09-01 12:09:21 +08:00 committed by Greg Kroah-Hartman
parent 56603b2c82
commit 77dd55f5ec
1 changed files with 3 additions and 1 deletions
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4
drivers/net/veth.c
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@ -320,6 +320,7 @@ static netdev_tx_t veth_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct veth_priv *rcv_priv, *priv = netdev_priv(dev);
struct veth_rq *rq = NULL;
int ret = NETDEV_TX_OK;
struct net_device *rcv;
int length = skb->len;
bool use_napi = false;
@ -352,6 +353,7 @@ static netdev_tx_t veth_xmit(struct sk_buff *skb, struct net_device *dev)
} else {
drop:
atomic64_inc(&priv->dropped);
ret = NET_XMIT_DROP;
}
if (use_napi)
@ -359,7 +361,7 @@ drop:
rcu_read_unlock();
return NETDEV_TX_OK;
return ret;
}
static u64 veth_stats_tx(struct net_device *dev, u64 *packets, u64 *bytes)