cgroup: dump some global properties as well

These are present in every cgroup, so let's dump them.
Signed-off-by: Tycho Andersen <tycho.andersen@canonical.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

cgroup.c

@@ -81,6 +81,13 @@ static const char *freezer_props[] = {
 	NULL
 };
 
+static const char *global_props[] = {
+	"cgroup.clone_children",
+	"cgroup.sane_behavior",
+	"notify_on_release",
+	NULL
+};
+
 /*
  * This structure describes set of controller groups
  * a task lives in. The cg_ctl entries are stored in
@@ -401,17 +408,13 @@ static const char **get_known_properties(char *controller)
 	return prop_arr;
 }
 
-static int add_cgroup_properties(const char *fpath, struct cgroup_dir *ncd,
-				 struct cg_controller *controller)
+static int dump_cg_props_array(const char *fpath, struct cgroup_dir *ncd,
+			       const char **prop_arr)
 {
-	int i, j;
+	int j;
 	char buf[PATH_MAX];
 	struct cgroup_prop *prop;
 
-	for (i = 0; i < controller->n_controllers; ++i) {
-
-		const char **prop_arr = get_known_properties(controller->controllers[i]);
-
 	for (j = 0; prop_arr != NULL && prop_arr[j] != NULL; ++j) {
 		if (snprintf(buf, PATH_MAX, "%s/%s", fpath, prop_arr[j]) >= PATH_MAX) {
 			pr_err("snprintf output was truncated\n");
@@ -439,6 +442,28 @@ static int add_cgroup_properties(const char *fpath, struct cgroup_dir *ncd,
 		list_add_tail(&prop->list, &ncd->properties);
 		ncd->n_properties++;
 	}
+
+	return 0;
+}
+
+static int add_cgroup_properties(const char *fpath, struct cgroup_dir *ncd,
+				 struct cg_controller *controller)
+{
+	int i;
+
+	for (i = 0; i < controller->n_controllers; ++i) {
+
+		const char **prop_arr = get_known_properties(controller->controllers[i]);
+
+		if (dump_cg_props_array(fpath, ncd, prop_arr) < 0) {
+			pr_err("dumping known properties failed");
+			return -1;
+		}
+
+		if (dump_cg_props_array(fpath, ncd, global_props) < 0) {
+			pr_err("dumping global properties failed");
+			return -1;
+		}
 	}
 
 	return 0;