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https://github.com/xdp-project/bpf-examples.git
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6f47602582
Add a debug mode to pkt-loop-filter that outputs debug messages for every dropped packet (with the reason it was dropped). Also add a small script to read the kernel trace pipe, after making sure tracing is active (otherwise there will be no output in the pipe). The source MAC address+VLAN is squeezed into a single u64 when printing as a quick workaround to the lack of MAC address printing in BPF printk. Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
14 lines
300 B
Bash
Executable File
14 lines
300 B
Bash
Executable File
#!/bin/sh
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set -o errexit
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TRACE_ACTIVE=$(cat /sys/kernel/debug/tracing/tracing_on)
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if [ "$TRACE_ACTIVE" -ne "1" ]; then
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echo "Kernel tracing disabled, enabling"
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echo 1 > /sys/kernel/debug/tracing/tracing_on
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fi
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echo "Reading trace pipe, ^C to exit"
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cat /sys/kernel/debug/tracing/trace_pipe
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