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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,63 @@ | ||
| //go:build linux | ||
|
|
||
| package ebpftracer | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/base64" | ||
| "errors" | ||
|
|
||
| "github.com/castai/kvisor/cmd/agent/daemon/metrics" | ||
| "github.com/castai/kvisor/pkg/ebpftracer/decoder" | ||
| "github.com/cilium/ebpf" | ||
| "github.com/cilium/ebpf/ringbuf" | ||
| ) | ||
|
|
||
| func (t *Tracer) runPerfBufReaderLoop(ctx context.Context, target *ebpf.Map) error { | ||
| eventsReader, err := ringbuf.NewReader(target) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| go func() { | ||
| <-ctx.Done() | ||
| if err := eventsReader.Close(); err != nil { | ||
| t.log.Warnf("closing events reader: %v", err) | ||
| } | ||
| }() | ||
|
|
||
| // Allocate message decoder and perf record once. | ||
| // Under the hood per event reader will reuse and grow raw sample backing bytes slice. | ||
| ebpfMsgDecoder := decoder.NewEventDecoder(t.log, []byte{}) | ||
| var record ringbuf.Record | ||
|
|
||
| for { | ||
| select { | ||
| case <-ctx.Done(): | ||
| return ctx.Err() | ||
| default: | ||
| } | ||
|
|
||
| err := eventsReader.ReadInto(&record) | ||
| if err != nil { | ||
| if t.cfg.DebugEnabled { | ||
| t.log.Warnf("reading event: %v", err) | ||
| } | ||
| continue | ||
| } | ||
|
|
||
| // Reset decoder with new raw sample bytes. | ||
| ebpfMsgDecoder.Reset(record.RawSample) | ||
| if err := t.decodeAndExportEvent(ctx, ebpfMsgDecoder); err != nil { | ||
| if errors.Is(err, decoder.ErrTooManyArguments) { | ||
| data := ebpfMsgDecoder.Buffer() | ||
| t.log.Errorf("decoding event: too many arguments for event. payload=%s, err=%v", | ||
| base64.StdEncoding.EncodeToString(data), err) | ||
| } else if t.cfg.DebugEnabled || errors.Is(err, ErrPanic) { | ||
| t.log.Errorf("decoding event: %v", err) | ||
| } | ||
| metrics.AgentDecodeEventErrorsTotal.Inc() | ||
| continue | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| //go:build !linux | ||
|
|
||
| package ebpftracer | ||
|
|
||
| import ( | ||
| "context" | ||
|
|
||
| "github.com/cilium/ebpf" | ||
| ) | ||
| func (t *Tracer) runPerfBufReaderLoop(ctx context.Context, target *ebpf.Map) error { | ||
| return nil | ||
| } |