[PATCH v1 COLO Pre 06/12] tools/libxl: Update libxl__domain_unpause() to support qemu-xen

[Yang Hongyang <yanghy@cn.fujitsu.com>]

Currently, libxl__domain_unpause() only supports
qemu-xen-traditional. Update it to support qemu-xen.

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Yang Hongyang <yanghy@cn.fujitsu.com>
---
 tools/libxl/libxl.c | 42 +++++++++++++++++++++++++++++++++---------
 1 file changed, 33 insertions(+), 9 deletions(-)

diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
index 98f2a4f..b960984 100644
--- a/tools/libxl/libxl.c
+++ b/tools/libxl/libxl.c
@@ -966,10 +966,37 @@ out:
     return AO_INPROGRESS;
 }
 
-int libxl__domain_unpause(libxl__gc *gc, uint32_t domid)
+static int libxl__domain_unpause_device_model(libxl__gc *gc, uint32_t domid)
 {
     char *path;
     char *state;
+
+    switch (libxl__device_model_version_running(gc, domid)) {
+    case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL: {
+        uint32_t dm_domid = libxl_get_stubdom_id(CTX, domid);
+
+        path = libxl__device_model_xs_path(gc, dm_domid, domid, "/state");
+        state = libxl__xs_read(gc, XBT_NULL, path);
+        if (state != NULL && !strcmp(state, "paused")) {
+            libxl__qemu_traditional_cmd(gc, domid, "continue");
+            libxl__wait_for_device_model_deprecated(gc, domid, "running",
+                                                    NULL, NULL, NULL);
+        }
+        break;
+    }
+    case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN:
+        if (libxl__qmp_resume(gc, domid))
+            return ERROR_FAIL;
+        break;
+    default:
+        return ERROR_INVAL;
+    }
+
+    return 0;
+}
+
+int libxl__domain_unpause(libxl__gc *gc, uint32_t domid)
+{
     int ret, rc = 0;
 
     libxl_domain_type type = libxl__domain_type(gc, domid);
@@ -979,14 +1006,11 @@ int libxl__domain_unpause(libxl__gc *gc, uint32_t domid)
     }
 
     if (type == LIBXL_DOMAIN_TYPE_HVM) {
-        uint32_t dm_domid = libxl_get_stubdom_id(CTX, domid);
-
-        path = libxl__device_model_xs_path(gc, dm_domid, domid, "/state");
-        state = libxl__xs_read(gc, XBT_NULL, path);
-        if (state != NULL && !strcmp(state, "paused")) {
-            libxl__qemu_traditional_cmd(gc, domid, "continue");
-            libxl__wait_for_device_model_deprecated(gc, domid, "running",
-                                         NULL, NULL, NULL);
+        rc = libxl__domain_unpause_device_model(gc, domid);
+        if (rc < 0) {
+            LOG(ERROR, "failed to unpause device model for domain %u:%d",
+                domid, rc);
+            goto out;
         }
     }
 
-- 
1.9.1