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Add --filter-trace-only-bpf #469

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Add --filter-trace-only-bpf #469

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c4b80f2
Add --filter-trace-only-bpf
sachintiptur Dec 16, 2024
1180bab
Skip skb funcs
sachintiptur Jan 3, 2025
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2 changes: 2 additions & 0 deletions internal/pwru/types.go
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Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,7 @@ type Flags struct {
FilterTrackSkbByStackid bool
FilterTraceTc bool
FilterTraceXdp bool
FilterTraceOnlyBpf bool
FilterTrackBpfHelpers bool
FilterIfname string
FilterPcap string
Expand Down Expand Up @@ -72,6 +73,7 @@ func (f *Flags) SetFlags() {
flag.BoolVar(&f.FilterTrackSkbByStackid, "filter-track-skb-by-stackid", false, "trace a packet even after it is kfreed (e.g., traffic going through bridge)")
flag.BoolVar(&f.FilterTraceTc, "filter-trace-tc", false, "trace TC bpf progs")
flag.BoolVar(&f.FilterTraceXdp, "filter-trace-xdp", false, "trace XDP bpf progs")
flag.BoolVar(&f.FilterTraceOnlyBpf, "filter-trace-only-bpf", false, "trace only TC and XDP bpf progs")
flag.BoolVar(&f.FilterTrackBpfHelpers, "filter-track-bpf-helpers", false, "trace BPF helper functions")
flag.StringVar(&f.FilterIfname, "filter-ifname", "", "filter skb ifname in --filter-netns (if not specified, use current netns)")
flag.UintVar(&f.FilterKprobeBatch, "filter-kprobe-batch", 10, "batch size for kprobe attaching/detaching")
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5 changes: 5 additions & 0 deletions main.go
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Expand Up @@ -98,6 +98,11 @@ func main() {
useKprobeMulti = true
}

// If --filter-trace-only-bpf is set, then trace only TC and XDP
if flags.FilterTraceOnlyBpf {
flags.FilterTraceTc = true
flags.FilterTraceXdp = true
}
funcs, err := pwru.GetFuncs(flags.FilterFunc, btfSpec, flags.KMods, useKprobeMulti)
if err != nil {
log.Fatalf("Failed to get skb-accepting functions: %s", err)
Expand Down