Fix missing Topology in NodeCSIInfo

Added code to correctly retrieve and convert the Topology from the gRPC
Swarm Node.

Signed-off-by: Drew Erny <derny@mirantis.com>
(cherry picked from commit cdb1293eea)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

daemon/cluster/convert/node.go

@@ -58,13 +58,20 @@ func NodeFromGRPC(n swarmapi.Node) types.Node {
 		}
 		for _, csi := range n.Description.CSIInfo {
 			if csi != nil {
-				node.Description.CSIInfo = append(
-					node.Description.CSIInfo,
-					types.NodeCSIInfo{
+				convertedInfo := types.NodeCSIInfo{
 					PluginName:        csi.PluginName,
 					NodeID:            csi.NodeID,
 					MaxVolumesPerNode: csi.MaxVolumesPerNode,
-					},
+				}
+
+				if csi.AccessibleTopology != nil {
+					convertedInfo.AccessibleTopology = &types.Topology{
+						Segments: csi.AccessibleTopology.Segments,
+					}
+				}
+
+				node.Description.CSIInfo = append(
+					node.Description.CSIInfo, convertedInfo,
 				)
 			}
 		}

daemon/cluster/convert/node_test.go

@@ -0,0 +1,60 @@
+package convert
+
+import (
+	"testing"
+
+	types "github.com/docker/docker/api/types/swarm"
+	swarmapi "github.com/moby/swarmkit/v2/api"
+	"gotest.tools/v3/assert"
+)
+
+// TestNodeCSIInfoFromGRPC tests that conversion of the NodeCSIInfo from the
+// gRPC to the Docker types is correct.
+func TestNodeCSIInfoFromGRPC(t *testing.T) {
+	node := &swarmapi.Node{
+		ID: "someID",
+		Description: &swarmapi.NodeDescription{
+			CSIInfo: []*swarmapi.NodeCSIInfo{
+				&swarmapi.NodeCSIInfo{
+					PluginName:        "plugin1",
+					NodeID:            "p1n1",
+					MaxVolumesPerNode: 1,
+				},
+				&swarmapi.NodeCSIInfo{
+					PluginName:        "plugin2",
+					NodeID:            "p2n1",
+					MaxVolumesPerNode: 2,
+					AccessibleTopology: &swarmapi.Topology{
+						Segments: map[string]string{
+							"a": "1",
+							"b": "2",
+						},
+					},
+				},
+			},
+		},
+	}
+
+	expected := []types.NodeCSIInfo{
+		{
+			PluginName:        "plugin1",
+			NodeID:            "p1n1",
+			MaxVolumesPerNode: 1,
+		},
+		{
+			PluginName:        "plugin2",
+			NodeID:            "p2n1",
+			MaxVolumesPerNode: 2,
+			AccessibleTopology: &types.Topology{
+				Segments: map[string]string{
+					"a": "1",
+					"b": "2",
+				},
+			},
+		},
+	}
+
+	actual := NodeFromGRPC(*node)
+
+	assert.DeepEqual(t, actual.Description.CSIInfo, expected)
+}