Adds a new bpf_setsockopt for TCP sockets, TCP_BPF_WINDOW_CLAMP, which sets the maximum receiver window size. It will be useful for limiting receiver window based on RTT. Signed-off-by: Prankur gupta <prankgup@xxxxxx> --- net/core/filter.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/net/core/filter.c b/net/core/filter.c index 2ca5eecebacf..cb006962b677 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -4910,6 +4910,14 @@ static int _bpf_setsockopt(struct sock *sk, int level, int optname, tp->notsent_lowat = val; sk->sk_write_space(sk); break; + case TCP_WINDOW_CLAMP: + if (val <= 0) + ret = -EINVAL; + else + tp->window_clamp = + max_t(int, val, + SOCK_MIN_RCVBUF / 2); + break; default: ret = -EINVAL; } -- 2.24.1
