[PATCH 4/5] libxl: add "downscript=no" to Qemu call

[Roger Pau Monne <roger.pau@citrix.com>]

Currently we only pass script=no to Qemu, to avoid calling any scripts when
attaching a tap interface, but we should also pass downscript=no to avoid Qemu
trying to execute a script when disconnecting the interface. This prevents the
following harmless error message:

/etc/qemu-ifdown: could not launch network script

Signed-off-by: Roger Pau Monne <roger.pau@citrix.com>
---
 tools/libxl/libxl_dm.c |   17 +++++++++++------
 1 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/tools/libxl/libxl_dm.c b/tools/libxl/libxl_dm.c
index ba5bef7..8dc588d 100644
--- a/tools/libxl/libxl_dm.c
+++ b/tools/libxl/libxl_dm.c
@@ -216,11 +216,14 @@ static char ** libxl__build_device_model_args_old(libxl__gc *gc,
                 else
                     ifname = vifs[i].ifname;
                 flexarray_vappend(dm_args,
-                                "-net", libxl__sprintf(gc, "nic,vlan=%d,macaddr=%s,model=%s",
-                                                       vifs[i].devid, smac, vifs[i].model),
-                                "-net", libxl__sprintf(gc, "tap,vlan=%d,ifname=%s,bridge=%s,script=%s",
-                                                       vifs[i].devid, ifname, vifs[i].bridge, libxl_tapif_script(gc)),
-                                NULL);
+                "-net", libxl__sprintf(gc, "nic,vlan=%d,macaddr=%s,model=%s",
+                                       vifs[i].devid, smac, vifs[i].model),
+                "-net", libxl__sprintf(gc,
+                               "tap,vlan=%d,ifname=%s,bridge=%s,script=%s,"
+                               "downscript=%s",
+                               vifs[i].devid, ifname, vifs[i].bridge,
+                               libxl_tapif_script(gc), libxl_tapif_script(gc)),
+                               NULL);
                 ioemu_vifs++;
             }
         }
@@ -462,8 +465,10 @@ static char ** libxl__build_device_model_args_new(libxl__gc *gc,
                                                 vifs[i].devid, smac));
                 flexarray_append(dm_args, "-netdev");
                 flexarray_append(dm_args,
-                   libxl__sprintf(gc, "type=tap,id=net%d,ifname=%s,script=%s",
+                   libxl__sprintf(gc, "type=tap,id=net%d,ifname=%s,script=%s,"
+                                      "downscript=%s",
                                                 vifs[i].devid, ifname,
+                                                libxl_tapif_script(gc),
                                                 libxl_tapif_script(gc)));
                 ioemu_vifs++;
             }
-- 
1.7.7.5 (Apple Git-26)