BPF_SOCK_OPS_RTT_CB 3419 include/uapi/linux/bpf.h BPF_SOCK_OPS_RTT_CB, /* Called on every RTT. BPF_SOCK_OPS_RTT_CB 3419 tools/include/uapi/linux/bpf.h BPF_SOCK_OPS_RTT_CB, /* Called on every RTT.