[Xen-devel] [PATCH 1/7] libxl, Introduce dm-version xenstore key.

[Anthony PERARD <anthony.perard@xxxxxxxxxx>]

The key is /local/domain/$domid/dm-version.
This come with libxl__device_model_version_running helper function.

Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
---
 tools/libxl/libxl_create.c   |    5 +++++
 tools/libxl/libxl_internal.c |   19 +++++++++++++++++++
 tools/libxl/libxl_internal.h |    5 +++++
 3 files changed, 29 insertions(+), 0 deletions(-)

diff --git a/tools/libxl/libxl_create.c b/tools/libxl/libxl_create.c
index e1e3258..3f33d90 100644
--- a/tools/libxl/libxl_create.c
+++ b/tools/libxl/libxl_create.c
@@ -175,6 +175,11 @@ int libxl__domain_build(libxl__gc *gc,
 
     gettimeofday(&start_time, NULL);
 
+    localents = libxl__calloc(gc, 3, sizeof (char *));
+    i = 0;
+    localents[i++] = "dm-version";
+    localents[i++] = libxl__strdup(gc, 
libxl_device_model_version_to_string(dm_info->device_model_version));
+
     switch (info->type) {
     case LIBXL_DOMAIN_TYPE_HVM:
         ret = libxl__build_hvm(gc, domid, info, dm_info, state);
diff --git a/tools/libxl/libxl_internal.c b/tools/libxl/libxl_internal.c
index 3b8a41f..e535c0c 100644
--- a/tools/libxl/libxl_internal.c
+++ b/tools/libxl/libxl_internal.c
@@ -318,3 +318,22 @@ int libxl__fd_set_cloexec(int fd)
     }
     return fcntl(fd, F_SETFD, flags | FD_CLOEXEC);
 }
+
+libxl_device_model_version libxl__device_model_version_running(libxl__gc *gc,
+                                                               uint32_t domid)
+{
+    char *path = NULL;
+    char *dm_version = NULL;
+    libxl_device_model_version value;
+
+    path = libxl__sprintf(gc, "/local/domain/%d/dm-version", domid);
+    dm_version = libxl__xs_read(gc, XBT_NULL, path);
+    if (!dm_version) {
+        return LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL;
+    }
+
+    if (libxl_device_model_version_from_string(dm_version, &value) < 0) {
+        return LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL;
+    }
+    return value;
+}
diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
index 935c899..4dd0f91 100644
--- a/tools/libxl/libxl_internal.h
+++ b/tools/libxl/libxl_internal.h
@@ -554,4 +554,9 @@ _hidden void libxl__json_object_free(libxl__gc *gc, 
libxl__json_object *obj);
 
 _hidden libxl__json_object *libxl__json_parse(libxl__gc *gc, const char *s);
 
+  /* Based on /local/domain/$domid/dm-version xenstore key
+   * default is qemu xen traditional */
+_hidden libxl_device_model_version
+libxl__device_model_version_running(libxl__gc *gc, uint32_t domid);
+
 #endif
-- 
Anthony PERARD


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