bpf: add BPF_CGROUP_SOCK_OPS callback that is executed on every RTT (commit: 23729ff23186424)

Hi Stanislav,

I have a question about the placement of tcp_bpf_rtt() call in
tcp_rtt_estimator(). Why is the call made before the assignment

tp->srtt_us = max(1U, srtt);

How is the attached eBPF program suppose the get the new value?

Thanks,

Shoaib