xl: allow specifying a default gatewaydev in xl.conf

This adds a new global option in the xl configuration file called
"vif.default.gatewaydev", that is used to specify the default
gatewaydev to use when none is passed in the vif specification.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Tested-by: Ulf Kreutzberg <ulf.kreutzberg@hosteurope.de>
Cc: Ulf Kreutzberg <ulf.kreutzberg@hosteurope.de>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: George Dunlap <george.dunlap@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/tools/libxl/xl.c b/tools/libxl/xl.c
index ecbcd3bf1d..71561a49ef 100644
--- a/tools/libxl/xl.c
+++ b/tools/libxl/xl.c
@@ -43,6 +43,7 @@ int run_hotplug_scripts = 1;
 char *lockfile;
 char *default_vifscript = NULL;
 char *default_bridge = NULL;
+char *default_gatewaydev = NULL;
 enum output_format default_output_format = OUTPUT_FORMAT_JSON;
 
 static xentoollog_level minmsglevel = XTL_PROGRESS;
@@ -85,12 +86,25 @@ static void parse_global_config(const char *configfile,
         exit(1);
     }
 
+    /*
+     * For global options that are related to a specific type of device
+     * we use the following nomenclature:
+     *
+     * <device type>.default.<option name>
+     *
+     * This allows us to keep the default options classified for the
+     * different device kinds.
+     */
+
     if (!xlu_cfg_get_string (config, "vifscript", &buf, 0))
         default_vifscript = strdup(buf);
 
     if (!xlu_cfg_get_string (config, "defaultbridge", &buf, 0))
 	default_bridge = strdup(buf);
 
+    if (!xlu_cfg_get_string (config, "vif.default.gatewaydev", &buf, 0))
+        default_gatewaydev = strdup(buf);
+
     if (!xlu_cfg_get_string (config, "output_format", &buf, 0)) {
         if (!strcmp(buf, "json"))
             default_output_format = OUTPUT_FORMAT_JSON;