libxc: add ability to query OS interface for "fakeness"

i.e. not running on a real hypervisor

Allows users of the library to adjust behaviour. I don't especially
like this violation of the abstraction but both oxenstored and xapi
use this to avoid difficult to simulate operations when running on the
simulator.

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

1 files changed, 3 insertions, 0 deletions

diff --git a/tools/libxc/xenctrlosdep.h b/tools/libxc/xenctrlosdep.h
index d862fcff85..874fd653b4 100644
--- a/tools/libxc/xenctrlosdep.h
+++ b/tools/libxc/xenctrlosdep.h
@@ -122,6 +122,9 @@ struct xc_osdep_info
 
     /* Returns ops function. */
     xc_osdep_init_fn init;
+
+    /* True if this interface backs onto a fake Xen. */
+    int fake;
 };
 typedef struct xc_osdep_info xc_osdep_info_t;