Commit 5584cd7e authored by Jason Xing's avatar Jason Xing Committed by Martin KaFai Lau
Browse files

tcp: bpf: Support bpf_getsockopt for TCP_BPF_RTO_MIN 



Support bpf_getsockopt if application tries to know what the RTO MIN
of this socket is.

Signed-off-by: default avatarJason Xing <kerneljasonxing@gmail.com>
Signed-off-by: default avatarMartin KaFai Lau <martin.lau@kernel.org>
Link: https://patch.msgid.link/20250312153523.9860-3-kerneljasonxing@gmail.com
parent 49f6713c

net/core/filter.c

+6 −0
Original line number Diff line number Diff line
@@ -5295,6 +5295,12 @@ static int bpf_sol_tcp_getsockopt(struct sock *sk, int optname, 
		memcpy(optval, &cb_flags, optlen);

		break;

	}

	case TCP_BPF_RTO_MIN: {

		int rto_min_us = jiffies_to_usecs(inet_csk(sk)->icsk_rto_min);



		memcpy(optval, &rto_min_us, optlen);

		break;

	}

	default:

		return -EINVAL;

	}