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skmsg: Increase sk->sk_drops when dropping packets
[ Upstream commit 781dd04 ] It is hard to observe packet drops without increasing relevant drop counters, here we should increase sk->sk_drops which is a protocol-independent counter. Fortunately psock is always associated with a struct sock, we can just use psock->sk. Suggested-by: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Cong Wang <cong.wang@bytedance.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Jakub Sitnicki <jakub@cloudflare.com> Link: https://lore.kernel.org/bpf/20210615021342.7416-9-xiyou.wangcong@gmail.com Signed-off-by: Sasha Levin <sashal@kernel.org>
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