[RFC Patch v3 5/8] Update libxl__domain_unpause() to support qemu-xen

[Wen Congyang <wency@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>
---
 tools/libxl/libxl.c          | 13 +++++--------
 tools/libxl/libxl_dom.c      | 25 +++++++++++++++++++++++++
 tools/libxl/libxl_internal.h |  2 ++
 3 files changed, 32 insertions(+), 8 deletions(-)

diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
index e570103..1de1b92 100644
--- a/tools/libxl/libxl.c
+++ b/tools/libxl/libxl.c
@@ -978,8 +978,6 @@ out:
 
 int libxl__domain_unpause(libxl__gc *gc, uint32_t domid)
 {
-    char *path;
-    char *state;
     int ret, rc = 0;
 
     libxl_domain_type type = libxl__domain_type(gc, domid);
@@ -989,12 +987,11 @@ int libxl__domain_unpause(libxl__gc *gc, uint32_t domid)
     }
 
     if (type == LIBXL_DOMAIN_TYPE_HVM) {
-        path = libxl__sprintf(gc, "/local/domain/0/device-model/%d/state", domid);
-        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;
         }
     }
 
diff --git a/tools/libxl/libxl_dom.c b/tools/libxl/libxl_dom.c
index cf56343..caa6b1d 100644
--- a/tools/libxl/libxl_dom.c
+++ b/tools/libxl/libxl_dom.c
@@ -2008,6 +2008,31 @@ static void remus_teardown_done(libxl__egc *egc,
     dss->callback(egc, dss, rc);
 }
 
+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:
+        path = libxl__sprintf(gc, "/local/domain/0/device-model/%d/state", domid);
+        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);
+        }
+    case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN:
+        if (libxl__qmp_resume(gc, domid))
+            return ERROR_FAIL;
+        break;
+    default:
+        return ERROR_FAIL;
+    }
+
+    return 0;
+}
+
 /*==================== Miscellaneous ====================*/
 
 char *libxl__uuid2string(libxl__gc *gc, const libxl_uuid uuid)
diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
index 337ffb5..313ad1c 100644
--- a/tools/libxl/libxl_internal.h
+++ b/tools/libxl/libxl_internal.h
@@ -993,6 +993,8 @@ _hidden int libxl__toolstack_restore(uint32_t domid, const uint8_t *buf,
 _hidden int libxl__domain_resume_device_model(libxl__gc *gc,
                                               uint32_t domid,
                                               int read_savefile);
+_hidden int libxl__domain_unpause_device_model(libxl__gc *gc,
+                                               uint32_t domid);
 
 _hidden void libxl__userdata_destroyall(libxl__gc *gc, uint32_t domid);
 
-- 
1.9.3