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tcp: bpf: Support bpf_getsockopt for TCP_BPF_RTO_MIN

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

Signed-off-by: Jason Xing <kerneljasonxing@gmail.com>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://patch.msgid.link/20250312153523.9860-3-kerneljasonxing@gmail.com
This commit is contained in:
Jason Xing
2025-03-12 16:35:21 +01:00
committed by Martin KaFai Lau
parent 49f6713cb6
commit 5584cd7e0d
1 changed files with 6 additions and 0 deletions
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6
net/core/filter.c
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@@ -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;
}