qemu: capabilities: Enable QEMU_CAPS_INCREMENTAL_BACKUP

For incremental backup we need QEMU_CAPS_BLOCKDEV,
QEMU_CAPS_BLOCKDEV_REOPEN, QEMU_CAPS_MIGRATION_PARAM_BLOCK_BITMAP_MAPPING.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>

diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 600952a53a79becae9b06317e0c5a3aab4886253..f40d6d77bebe28c381775ae012425ebb2faf65a7 100644 (file)
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -5167,8 +5167,10 @@ virQEMUCapsInitQMPVersionCaps(virQEMUCapsPtr qemuCaps)
 void
 virQEMUCapsInitProcessCapsInterlock(virQEMUCapsPtr qemuCaps)
 {
-    if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_BLOCKDEV))
-        virQEMUCapsClear(qemuCaps, QEMU_CAPS_INCREMENTAL_BACKUP);
+    if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_BLOCKDEV) &&
+        virQEMUCapsGet(qemuCaps, QEMU_CAPS_BLOCKDEV_REOPEN) &&
+        virQEMUCapsGet(qemuCaps, QEMU_CAPS_MIGRATION_PARAM_BLOCK_BITMAP_MAPPING))
+        virQEMUCapsSet(qemuCaps, QEMU_CAPS_INCREMENTAL_BACKUP);
 
     if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_USB_STORAGE) &&
         !virQEMUCapsGet(qemuCaps, QEMU_CAPS_USB_STORAGE_WERROR)) {