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@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>

diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
index 4f5e647ec814ab5b24e28b6700d1185e979cc8cd..1e23e9dfbd0579da0100ff58d9f299c66e491aca 100644 (file)
--- a/tools/libxl/libxl.c
+++ b/tools/libxl/libxl.c
@@ -926,6 +926,9 @@ int libxl_device_disk_add(libxl_ctx *ctx, uint32_t domid, libxl_device_disk *dis
     libxl__device device;
     int major, minor, rc;
 
+    rc = libxl__device_disk_set_backend(&gc, disk);
+    if (rc) goto out;
+
     front = flexarray_make(16, 1);
     if (!front) {
         rc = ERROR_NOMEM;