libxl: set the device model version earlier in xenstore

So libxl doesn't have to pass the build info around just to get the device
model used by the guest. This allows to simplify
libxl__device_nic_setdefault.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>

diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
index 8719f542e5a7cbe67fc30eed4f5e9f90c1f96c65..8901eb481d4f889cd1fea524379a5225e37f9957 100644 (file)
--- a/tools/libxl/libxl.c
+++ b/tools/libxl/libxl.c
@@ -3299,7 +3299,7 @@ out:
 /******************************************************************************/
 
 int libxl__device_nic_setdefault(libxl__gc *gc, libxl_device_nic *nic,
-                                 uint32_t domid, libxl_domain_build_info *info)
+                                 uint32_t domid)
 {
     int rc;
 
@@ -3337,21 +3337,11 @@ int libxl__device_nic_setdefault(libxl__gc *gc, libxl_device_nic *nic,
     switch (libxl__domain_type(gc, domid)) {
     case LIBXL_DOMAIN_TYPE_HVM:
         if (!nic->nictype) {
-            if (info != NULL) {
-                /* Path taken at creation time. */
-                if (info->device_model_version ==
-                    LIBXL_DEVICE_MODEL_VERSION_NONE)
-                    nic->nictype = LIBXL_NIC_TYPE_VIF;
-                else
-                    nic->nictype = LIBXL_NIC_TYPE_VIF_IOEMU;
-            } else {
-                /* Path taken when hot-adding a nic. */
-                if (libxl__device_model_version_running(gc, domid) ==
-                    LIBXL_DEVICE_MODEL_VERSION_NONE)
-                    nic->nictype = LIBXL_NIC_TYPE_VIF;
-                else
-                    nic->nictype = LIBXL_NIC_TYPE_VIF_IOEMU;
-            }
+            if (libxl__device_model_version_running(gc, domid) ==
+                LIBXL_DEVICE_MODEL_VERSION_NONE)
+                nic->nictype = LIBXL_NIC_TYPE_VIF;
+            else
+                nic->nictype = LIBXL_NIC_TYPE_VIF_IOEMU;
         }
         break;
     case LIBXL_DOMAIN_TYPE_PV:
@@ -3401,7 +3391,7 @@ void libxl__device_nic_add(libxl__egc *egc, uint32_t domid,
     libxl_device_nic_init(&nic_saved);
     libxl_device_nic_copy(CTX, &nic_saved, nic);
 
-    rc = libxl__device_nic_setdefault(gc, nic, domid, NULL);
+    rc = libxl__device_nic_setdefault(gc, nic, domid);
     if (rc) goto out;
 
     front = flexarray_make(gc, 16, 1);

diff --git a/tools/libxl/libxl_create.c b/tools/libxl/libxl_create.c
index cae7ab030c6028a9deed943178eb7f768edc5bd9..0904fd2d9e4bbf5f82f44b7e09038f17e1196d9b 100644 (file)
--- a/tools/libxl/libxl_create.c
+++ b/tools/libxl/libxl_create.c
@@ -916,6 +916,12 @@ static void initiate_domain_create(libxl__egc *egc,
         goto error_out;
     }
 
+    /*
+     * Set the dm version quite early so that libxl doesn't have to pass the
+     * build info around just to know if the domain has a device model or not.
+     */
+    store_libxl_entry(gc, domid, &d_config->b_info);
+
     for (i = 0; i < d_config->num_disks; i++) {
         ret = libxl__device_disk_setdefault(gc, &d_config->disks[i]);
         if (ret) {
@@ -940,8 +946,7 @@ static void initiate_domain_create(libxl__egc *egc,
          * called libxl_device_nic_add when domcreate_launch_dm gets called,
          * but qemu needs the nic information to be complete.
          */
-        ret = libxl__device_nic_setdefault(gc, &d_config->nics[i], domid,
-                                           &d_config->b_info);
+        ret = libxl__device_nic_setdefault(gc, &d_config->nics[i], domid);
         if (ret) {
             LOG(ERROR, "Unable to set nic defaults for nic %d", i);
             goto error_out;

diff --git a/tools/libxl/libxl_dm.c b/tools/libxl/libxl_dm.c
index ba45ba5a4fce22acffabb7ad3af8809a76050823..fd12844f5ea7c77c4243538db3c6be6ad45dbfb7 100644 (file)
--- a/tools/libxl/libxl_dm.c
+++ b/tools/libxl/libxl_dm.c
@@ -1811,8 +1811,7 @@ static void spawn_stub_launch_dm(libxl__egc *egc,
          * called libxl_device_nic_add at this point, but qemu needs
          * the nic information to be complete.
          */
-        ret = libxl__device_nic_setdefault(gc, &dm_config->nics[i], dm_domid,
-                                           &dm_config->b_info);
+        ret = libxl__device_nic_setdefault(gc, &dm_config->nics[i], dm_domid);
         if (ret)
             goto out;
     }

diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
index 6dce93ffbadc22b102c86e20cc3349ef7004f562..5a889828f0a5b39faa86b4f67f9d591e92ab82b6 100644 (file)
--- a/tools/libxl/libxl_internal.h
+++ b/tools/libxl/libxl_internal.h
@@ -1216,8 +1216,7 @@ _hidden int libxl__domain_build_info_setdefault(libxl__gc *gc,
 _hidden int libxl__device_disk_setdefault(libxl__gc *gc,
                                           libxl_device_disk *disk);
 _hidden int libxl__device_nic_setdefault(libxl__gc *gc, libxl_device_nic *nic,
-                                         uint32_t domid,
-                                         libxl_domain_build_info *info);
+                                         uint32_t domid);
 _hidden int libxl__device_vtpm_setdefault(libxl__gc *gc, libxl_device_vtpm *vtpm);
 _hidden int libxl__device_vfb_setdefault(libxl__gc *gc, libxl_device_vfb *vfb);
 _hidden int libxl__device_vkb_setdefault(libxl__gc *gc, libxl_device_vkb *vkb);