libxl: add all pci devices to xenstore at once (during VM create)

When adding pci devices one by one, pciback notice only the first one. For
every next, "state" is left as is (usualy "4" in that time), so backend will
not rescan xenstore. So when VM is starting all devices should be added at once
and then backend can initialize it.

This applies only to pci, because only pci backend have one xenstore dir for
multiple devices.

Signed-off-by: Marek Marczykowski <marmarek@mimuw.edu.pl>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/tools/libxl/libxl_pci.c b/tools/libxl/libxl_pci.c
index 307ca2376b..8d2c4d19a3 100644
--- a/tools/libxl/libxl_pci.c
+++ b/tools/libxl/libxl_pci.c
@@ -221,7 +221,8 @@ static void libxl_create_pci_backend_device(libxl__gc *gc, flexarray_t *back, in
     flexarray_append_pair(back, libxl__sprintf(gc, "state-%d", num), libxl__sprintf(gc, "%d", 1));
 }
 
-static int libxl__create_pci_backend(libxl__gc *gc, uint32_t domid, libxl_device_pci *pcidev, int num)
+int libxl__create_pci_backend(libxl__gc *gc, uint32_t domid,
+                              libxl_device_pci *pcidev, int num)
 {
     libxl_ctx *ctx = libxl__gc_owner(gc);
     flexarray_t *front = NULL;
@@ -707,7 +708,10 @@ out:
         }
     }
 
-    rc = libxl__device_pci_add_xenstore(gc, domid, pcidev, starting);
+    if (!starting)
+        rc = libxl__device_pci_add_xenstore(gc, domid, pcidev, starting);
+    else
+        rc = 0;
     return rc;
 }