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net: bpf: Use the protocol's set_rcvlowat behavior if there is one

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The commit d1361840f8 ("tcp: fix SO_RCVLOWAT and RCVBUF autotuning")
add one new (struct proto_ops)->set_rcvlowat method so that a protocol
can override the default setsockopt(SO_RCVLOWAT) behavior.

The prior bpf codes don't check and invoke the protos's set_rcvlowat,
now correct it.

Signed-off-by: Gao Feng <gfree.wind@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Gao Feng 2022-08-04 23:04:21 +08:00 committed by David S. Miller
parent 7a542bee27
commit f574f7f839
1 changed files with 4 additions and 1 deletions
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5
net/core/filter.c
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@ -5063,7 +5063,10 @@ static int __bpf_setsockopt(struct sock *sk, int level, int optname,
case SO_RCVLOWAT:
if (val < 0)
val = INT_MAX;
WRITE_ONCE(sk->sk_rcvlowat, val ? : 1);
if (sk->sk_socket && sk->sk_socket->ops->set_rcvlowat)
ret = sk->sk_socket->ops->set_rcvlowat(sk, val);
else
WRITE_ONCE(sk->sk_rcvlowat, val ? : 1);
break;
case SO_MARK:
if (sk->sk_mark != val) {