From: Gao Feng <gfree.wind@xxxxxxxxx>
The commit d1361840f8c5 ("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@xxxxxxxxx>
---
net/core/filter.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/net/core/filter.c b/net/core/filter.c
index 7950f7520765..beb6209897ab 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -5064,7 +5064,10 @@ 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) {
--
2.25.1
