rbd: add Image.GetCreateTimestamp()

Signed-off-by: Niels de Vos <ndevos@redhat.com>

rbd/rbd.go

@@ -18,6 +18,7 @@ import (
 	"unsafe"
 
 	"github.com/ceph/go-ceph/internal/retry"
+	ts "github.com/ceph/go-ceph/internal/timespec"
 	"github.com/ceph/go-ceph/rados"
 )
 
@@ -45,6 +46,9 @@ const (
 	NoSnapshot = ""
 )
 
+// Timespec is a public type for the internal C 'struct timespec'
+type Timespec ts.Timespec
+
 // ImageInfo represents the status information for an image.
 type ImageInfo struct {
 	Size              uint64

rbd/rbd_nautilus.go

@@ -1,6 +1,7 @@
 // +build !luminous,!mimic
 //
-// Ceph Nautilus is the first release that includes rbd_list2().
+// Ceph Nautilus is the first release that includes rbd_list2() and
+// rbd_get_create_timestamp().
 
 package rbd
 
@@ -14,6 +15,7 @@ import (
 	"unsafe"
 
 	"github.com/ceph/go-ceph/internal/retry"
+	ts "github.com/ceph/go-ceph/internal/timespec"
 	"github.com/ceph/go-ceph/rados"
 )
 
@@ -45,3 +47,21 @@ func GetImageNames(ioctx *rados.IOContext) ([]string, error) {
 	}
 	return names, nil
 }
+
+// GetCreateTimestamp returns the time the rbd image was created.
+//
+// Implements:
+//  int rbd_get_create_timestamp(rbd_image_t image, struct timespec *timestamp);
+func (image *Image) GetCreateTimestamp() (Timespec, error) {
+	if err := image.validate(imageIsOpen); err != nil {
+		return Timespec{}, err
+	}
+
+	var cts C.struct_timespec
+
+	if ret := C.rbd_get_create_timestamp(image.image, &cts); ret < 0 {
+		return Timespec{}, getError(ret)
+	}
+
+	return Timespec(ts.CStructToTimespec(ts.CTimespecPtr(&cts))), nil
+}