tetragon: Add support to pass options for spec

Signed-off-by: Jiri Olsa <[email protected]>

pkg/sensors/tracing/generickprobe.go

@@ -508,11 +508,19 @@ func createGenericKprobeSensor(
 	kprobes := spec.KProbes
 	lists := spec.Lists
 
+	options, err := getKprobeOptions(spec.Options)
+	if err != nil {
+		return nil, fmt.Errorf("failed to set options: %s", err)
+	}
+
 	// use multi kprobe only if:
+	// - it's not disable via spec options
 	// - it's not disabled by user
 	// - there's support detected
-	useMulti = !option.Config.DisableKprobeMulti &&
-		bpf.HasKprobeMulti()
+	if !options.DisableKprobeMulti {
+		useMulti = !option.Config.DisableKprobeMulti &&
+			bpf.HasKprobeMulti()
+	}
 
 	in := addKprobeIn{
 		useMulti:      useMulti,

pkg/sensors/tracing/options.go

@@ -0,0 +1,51 @@
+package tracing
+
+import (
+	"fmt"
+	"strconv"
+
+	"github.com/cilium/tetragon/pkg/k8s/apis/cilium.io/v1alpha1"
+	"github.com/cilium/tetragon/pkg/logger"
+	"github.com/cilium/tetragon/pkg/option"
+)
+
+type kprobeOptions struct {
+	DisableKprobeMulti bool
+}
+
+func getKprobeOptions(specs []v1alpha1.OptionSpec) (*kprobeOptions, error) {
+	type opt struct {
+		name string
+		set  func(val string) error
+	}
+
+	options := &kprobeOptions{}
+
+	var opts = []opt{
+		opt{
+			// local --disable-kprobe-multi
+			name: option.KeyDisableKprobeMulti,
+			set: func(str string) (err error) {
+				options.DisableKprobeMulti, err = strconv.ParseBool(str)
+				return err
+			},
+		},
+	}
+
+	for i := range specs {
+		spec := specs[i]
+
+		for j := range opts {
+			opt := opts[j]
+
+			if opt.name == spec.Name {
+				if err := opt.set(spec.Value); err != nil {
+					return nil, fmt.Errorf("failed to set option %s: %s", opt.name, err)
+				}
+				logger.GetLogger().Infof("Set option %s = %s", spec.Name, spec.Value)
+			}
+		}
+	}
+
+	return options, nil
+}