BPF_PROG_ATTACH 1907 kernel/bpf/syscall.c if (CHECK_ATTR(BPF_PROG_ATTACH)) BPF_PROG_ATTACH 2891 kernel/bpf/syscall.c case BPF_PROG_ATTACH: BPF_PROG_ATTACH 473 tools/lib/bpf/bpf.c return sys_bpf(BPF_PROG_ATTACH, &attr, sizeof(attr));