BPF_SOCK_OPS_RTO_CB_FLAG 256 net/ipv4/tcp_timer.c if (BPF_SOCK_OPS_TEST_FLAG(tp, BPF_SOCK_OPS_RTO_CB_FLAG)) BPF_SOCK_OPS_RTO_CB_FLAG 60 tools/testing/selftests/bpf/progs/test_tcpnotify_kern.c BPF_SOCK_OPS_RTO_CB_FLAG));