feat: add AttachStructOps()

link.go

@@ -33,6 +33,7 @@ const (
 	CgroupLegacy
 	Netns
 	Iter
+	StructOps
 )
 
 //
@@ -47,6 +48,7 @@ type bpfLinkLegacy struct {
 type BPFLink struct {
 	link      *C.struct_bpf_link
 	prog      *BPFProg
+	m         *BPFMap
 	linkType  LinkType
 	eventName string
 	legacy    *bpfLinkLegacy // if set, this is a fake BPFLink

map.go

@@ -73,6 +73,19 @@ func (m *BPFMap) ReuseFD(fd int) error {
 	return nil
 }
 
+func (m *BPFMap) AttachStructOps() (*BPFLink, error) {
+	linkC, errno := C.bpf_map__attach_struct_ops(m.bpfMap)
+	if linkC == nil {
+		return nil, fmt.Errorf("failed to attach struct_ops: %w", errno)
+	}
+	return &BPFLink{
+		link:      linkC,
+		m:         m,
+		linkType:  StructOps,
+		eventName: fmt.Sprintf("structOps-%s", m.Name()),
+	}, nil
+}
+
 func (m *BPFMap) Name() string {
 	return C.GoString(C.bpf_map__name(m.bpfMap))
 }

selftest/common/Makefile

@@ -22,6 +22,9 @@ LDFLAGS =
 CGO_CFLAGS_STATIC = "-I$(abspath $(OUTPUT)) -I$(abspath ../common)"
 CGO_LDFLAGS_STATIC = "$(shell PKG_CONFIG_PATH=$(LIBBPF_OBJDIR) $(PKGCONFIG) --static --libs libbpf)"
 CGO_EXTLDFLAGS_STATIC = '-w -extldflags "-static"'
+SCX_FLAGS=-mcpu=v3 -mlittle-endian \
+-I ../../libbpf/src/usr/include -I ../../libbpf/include/uapi \
+-I /lib/modules/$(shell uname -r)/build/tools/sched_ext/include/scx -I /lib/modules/$(shell uname -r)/build/tools/sched_ext/include/bpf-compat
 
 CGO_CFLAGS_DYN = "-I. -I/usr/include/"
 CGO_LDFLAGS_DYN = "$(shell $(PKGCONFIG) --shared --libs libbpf)"
@@ -52,7 +55,7 @@ outputdir:
 ## test bpf dependency
 
 $(MAIN).bpf.o: $(MAIN).bpf.c
-	$(CLANG) $(CFLAGS) -target bpf -D__TARGET_ARCH_$(ARCH) -I$(OUTPUT) -I$(abspath ../common) -c $< -o $@
+	$(CLANG) $(CFLAGS) -target bpf -D__TARGET_ARCH_$(ARCH) $(SCX_FLAGS) -I$(OUTPUT) -I$(abspath ../common) -c $< -o $@
 
 ## test