Separate flag for reading trace pipe to logging (#3139)

Author: gnurizen

flags/flags.go

@@ -391,7 +391,8 @@ type FlagsHidden struct {
 }
 
 type FlagsBPF struct {
-	VerboseLogging   bool   `help:"Enable verbose BPF logging."`
+	VerboseLogging   bool   `help:"Enable verbose BPF logging from eBPF code to ebpf trace_pipe."`
+	LogTracePipe     bool   `help:"Copy bpf trace_pipe to info logging."`
 	EventsBufferSize uint32 `default:"8192"                     help:"Size in pages of the events buffer."`
 	MapScaleFactor   int    `default:"${default_map_scale_factor}" help:"Scaling factor for eBPF map sizes. Every increase by 1 doubles the map size. Increase if you see eBPF map size errors. Default is ${default_map_scale_factor} corresponding to 4GB of executable address space, max is ${max_map_scale_factor}."`
 	VerifierLogLevel uint32 `default:"0" help:"Log level of the eBPF verifier output (0,1,2). Default is 0."`

main.go

@@ -536,7 +536,7 @@ func mainWithExitCode() flags.ExitCode {
 		return flags.Failure("Failed to start trace handler: %v", err)
 	}
 
-	if f.BPF.VerboseLogging {
+	if f.BPF.LogTracePipe {
 		go readTracePipe(mainCtx)
 	}
 
@@ -656,7 +656,7 @@ func readTracePipe(ctx context.Context) {
 		}
 		line = strings.TrimSpace(line)
 		if len(line) > 0 {
-			log.Debugf("%s", line)
+			log.Infof("bpf: %s", line)
 		}
 	}
 }