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XDP dns rate limit program has static tail call which requires revert xdp-tool commit: (039bdea "xdp-loader: Only load the BPF program we need from object files") XDP dns rate limit program also uses bpf_printk helper which is not supported on FireBeeOS since kernel CONFIG_BPF_EVENTS which allows user to do kprobe, uprobe, tracepoint is not enabled, so bpf_printk helper is not available, so removed bpf_printk see discussion in [0] xdp-loader load xdp program with bpf tail call result in Bad file descriptor(-9) [0] https://github.com/xdp-project/xdp-tools/issues/377 Signed-off-by: Vincent Li <vincent.mc.li@gmail.com>