[PATCH v2 1/2] libxl: use xen-blkback for 'vbd' disk types by default

["Marek Marczykowski-Górecki" <marmarek@invisiblethingslab.com>]

This will allow later to make HVM domain without qemu in dom0 (in
addition to the one in stubdomain).

Signed-off-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>

---
This is extracted from v1 of "libxl: do not start dom0 qemu for
stubdomain when not needed".

Signed-off-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
---
 tools/libxl/libxl_disk.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tools/libxl/libxl_disk.c b/tools/libxl/libxl_disk.c
index 63de75c..7842d9b 100644
--- a/tools/libxl/libxl_disk.c
+++ b/tools/libxl/libxl_disk.c
@@ -56,10 +56,12 @@ static void disk_eject_xswatch_callback(libxl__egc *egc, libxl__ev_xswatch *w,
             "/local/domain/%d/backend/%" TOSTRING(BACKEND_STRING_SIZE)
            "[a-z]/%*d/%*d",
            &disk->backend_domid, backend_type);
-    if (!strcmp(backend_type, "tap") || !strcmp(backend_type, "vbd")) {
+    if (!strcmp(backend_type, "tap")) {
         disk->backend = LIBXL_DISK_BACKEND_TAP;
     } else if (!strcmp(backend_type, "qdisk")) {
         disk->backend = LIBXL_DISK_BACKEND_QDISK;
+    } else if (!strcmp(backend_type, "vbd")) {
+        disk->backend = LIBXL_DISK_BACKEND_PHY;
     } else {
         disk->backend = LIBXL_DISK_BACKEND_UNKNOWN;
     }
-- 
2.7.5


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