[PATCH 1/2] libxl: Allow network driver domains when run_hotplug_scritps is set

[George Dunlap <george.dunlap@eu.citrix.com>]

As of commit 05bfd984dfe7014f1f5ea1133608b9bab589c120, hotplug scripts
are not run if backend_domid != LIBXL_TOOSTACK_DOMID; so there is no reason
to restrict this for network driver domains any more.

This is a candidate for backporting to 4.3.

Signed-off-by: George Dunlap <george.dunlap@eu.citrix.com>
CC: Ian Campbell <ian.campbell@citrix.com>
CC: Ian Jackson <ian.jackson@citrix.com>
CC: Roger Pau Monne <roger.pau@citrix.com>
CC: Jan Beulich <jbeulich@suse.com>
---
 docs/misc/xl-network-configuration.markdown |    6 ++----
 tools/libxl/libxl.c                         |    7 -------
 2 files changed, 2 insertions(+), 11 deletions(-)

diff --git a/docs/misc/xl-network-configuration.markdown b/docs/misc/xl-network-configuration.markdown
index e0d3d2a..3c439d4 100644
--- a/docs/misc/xl-network-configuration.markdown
+++ b/docs/misc/xl-network-configuration.markdown
@@ -131,10 +131,8 @@ specified IP address to be used by the guest (blocking all others).
 ### backend
 
 Specifies the backend domain which this device should attach to. This
-defaults to domain 0. This option does not work if `run_hotplug_scripts`
-is not disabled in xl.conf (see xl.conf(5) man page for more information
-on this option). Specifying another domain requires setting up a driver
-domain which is outside the scope of this document.
+defaults to domain 0.  Specifying another domain requires setting up a
+driver domain which is outside the scope of this document.
 
 ### rate
 
diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
index bd63a30..81785df 100644
--- a/tools/libxl/libxl.c
+++ b/tools/libxl/libxl.c
@@ -2820,13 +2820,6 @@ int libxl__device_nic_setdefault(libxl__gc *gc, libxl_device_nic *nic,
     rc = libxl__resolve_domid(gc, nic->backend_domname, &nic->backend_domid);
     if (rc < 0) return rc;
 
-    if (nic->backend_domid != LIBXL_TOOLSTACK_DOMID && run_hotplug_scripts) {
-        LOG(ERROR, "cannot use a backend domain different than %d if"
-                   "hotplug scripts are executed from libxl",
-                   LIBXL_TOOLSTACK_DOMID);
-        return ERROR_FAIL;
-    }
-
     switch (libxl__domain_type(gc, domid)) {
     case LIBXL_DOMAIN_TYPE_HVM:
         if (!nic->nictype)
-- 
1.7.9.5