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net: tcp: add skb drop reasons to tcp_add_backlog()

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Pass the address of drop_reason to tcp_add_backlog() to store the
reasons for skb drops when fails. Following drop reasons are
introduced:

SKB_DROP_REASON_SOCKET_BACKLOG

Reviewed-by: Mengen Sun <mengensun@tencent.com>
Reviewed-by: Hao Peng <flyingpeng@tencent.com>
Signed-off-by: Menglong Dong <imagedong@tencent.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Menglong Dong
2022-02-20 15:06:33 +08:00
committed by David S. Miller
parent 643b622b51
commit 7a26dc9e7b
5 changed files with 13 additions and 4 deletions
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2
net/ipv6/tcp_ipv6.c
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@ -1784,7 +1784,7 @@ process:
if (!sock_owned_by_user(sk)) {
ret = tcp_v6_do_rcv(sk, skb);
} else {
if (tcp_add_backlog(sk, skb))
if (tcp_add_backlog(sk, skb, &drop_reason))
goto discard_and_relse;
}
bh_unlock_sock(sk);