libxl: probe disk backend type in libxl_device_disk_add

Without this "xl block-attach" does not work. On create do_domain_create already
catches this.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson.citrix.com>
Committed-by: Ian Jackson <ian.jackson.citrix.com>

diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
index bc8af628d8dd040b4a019ecbeca518b9aa05f2b7..1748e040a967f09a3f1dbc8cde7eab0fc97fae51 100644 (file)
--- a/tools/libxl/libxl.c
+++ b/tools/libxl/libxl.c
@@ -929,6 +929,9 @@ int libxl_device_disk_add(libxl_ctx *ctx, uint32_t domid, libxl_device_disk *dis
     rc = libxl__device_disk_set_backend(&gc, disk);
     if (rc) goto out;
 
+    rc = libxl__device_disk_set_backend(&gc, disk);
+    if (rc) goto out;
+
     front = flexarray_make(16, 1);
     if (!front) {
         rc = ERROR_NOMEM;