Re: [Libguestfs] [PATCH v2 3/4] libvirt backend: add detect-zeroes

@@ -1605,6 +1607,10 @@ construct_libvirt_xml_disk_driver_qemu (guestfs_h *g, break; } + if (data->qemu_version < 2001000) { + detect_zeroes = false; + } + start_element ("driver") { attribute ("name", "qemu"); attribute ("type", format); @@ -1613,6 +1619,8 @@ construct_libvirt_xml_disk_driver_qemu (guestfs_h *g, attribute ("discard", "unmap"); if (copyonread) attribute ("copy_on_read", "on"); + if (detect_zeroes) + attribute ("detect_zeroes", "on"); } end_element (); return 0;