BPF_SOCK_OPS_RTO_CB 3401 include/uapi/linux/bpf.h BPF_SOCK_OPS_RTO_CB, /* Called when an RTO has triggered. BPF_SOCK_OPS_RTO_CB 3401 tools/include/uapi/linux/bpf.h BPF_SOCK_OPS_RTO_CB, /* Called when an RTO has triggered.