Function structOpsCopyMemberBytes

struct_ops.go:164–202

structOpsCopyMemberBytes copies the bytes of `m` into `km`.

(m, km btf.Member, data, kernVData []byte, size int)

// structOpsCopyMemberBytes copies the bytes of `m` into `km`.
func structOpsCopyMemberBytes(m, km btf.Member, data, kernVData []byte, size int) error {
	mLayout, err := newStructOpsMemberLayout(m)
	if err != nil {
		return fmt.Errorf("user member %s: %w", m.Name, err)
	}

	kLayout, err := newStructOpsMemberLayout(km)
	if err != nil {
		return fmt.Errorf("kernel member %s: %w", km.Name, err)
	}

	if mLayout.size != size {
		return fmt.Errorf("member %q: unexpected validated size %d, got %d", m.Name, size, mLayout.size)
	}
	if kLayout.size != size {
		return fmt.Errorf("member %q: unexpected validated size %d, got %d", km.Name, size, kLayout.size)
	}

	src, err := mLayout.bytes(data)
	if err != nil {
		return fmt.Errorf("member %q: userdata is too small", m.Name)
	}

	dst, err := kLayout.bytes(kernVData)
	if err != nil {
		return fmt.Errorf("member %q: value type is too small", km.Name)
	}

	switch mLayout.typ.(type) {
	case *btf.Struct, *btf.Union:
		if !structOpsIsMemZeroed(src) {
			return fmt.Errorf("non-zero nested struct %s: %w", m.Name, ErrNotSupported)
		}
		return nil
	}

	copy(dst, src)
	return nil
}

// structOpsCopyMember copies `m` into `km`.
func structOpsCopyMember(m, km btf.Member, data []byte, kernVData []byte) error {