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net: fix __dev_kfree_skb_any() vs drop monitor

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[ Upstream commit ac3ad19584b26fae9ac86e4faebe790becc74491 ]

dev_kfree_skb() is aliased to consume_skb().

When a driver is dropping a packet by calling dev_kfree_skb_any()
we should propagate the drop reason instead of pretending
the packet was consumed.

Note: Now we have enum skb_drop_reason we could remove
enum skb_free_reason (for linux-6.4)

v2: added an unlikely(), suggested by Yunsheng Lin.

Fixes: e6247027e517 ("net: introduce dev_consume_skb_any()")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Yunsheng Lin <linyunsheng@huawei.com>
Reviewed-by: Yunsheng Lin <linyunsheng@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Eric Dumazet 2023-02-23 08:38:45 +00:00 committed by Greg Kroah-Hartman
parent 8dba9e7073
commit 896f014a17
1 changed files with 3 additions and 1 deletions
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4
net/core/dev.c
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@ -3146,8 +3146,10 @@ void __dev_kfree_skb_any(struct sk_buff *skb, enum skb_free_reason reason)
{
if (in_hardirq() || irqs_disabled())
__dev_kfree_skb_irq(skb, reason);
else if (unlikely(reason == SKB_REASON_DROPPED))
kfree_skb(skb);
else
dev_kfree_skb(skb);
consume_skb(skb);
}
EXPORT_SYMBOL(__dev_kfree_skb_any);