add fs.FSStatfser for SeaweedFS weed mount

weed/operation/stats.go

@@ -0,0 +1,24 @@
+package operation
+
+import (
+	"context"
+
+	"github.com/chrislusf/seaweedfs/weed/pb/master_pb"
+)
+
+func Statistics(server string, req *master_pb.StatisticsRequest) (resp *master_pb.StatisticsResponse, err error) {
+
+	err = withMasterServerClient(server, func(masterClient master_pb.SeaweedClient) error {
+		grpcResponse, grpcErr := masterClient.Statistics(context.Background(), req)
+		if grpcErr != nil {
+			return grpcErr
+		}
+
+		resp = grpcResponse
+
+		return nil
+
+	})
+
+	return
+}