encapsulate the ns_cgroup

src/lxc/cgroup.c

@@ -142,6 +142,16 @@ int lxc_unlink_nsgroup(const char *name)
 	return ret;
 }
 
+int lxc_cgroup_create(const char *name, pid_t pid)
+{
+	return lxc_rename_nsgroup(name, pid);
+}
+
+int lxc_cgroup_destroy(const char *name)
+{
+	return lxc_unlink_nsgroup(name);
+}
+
 int lxc_cgroup_path_get(char **path, const char *name)
 {
 	char cgroup[MAXPATHLEN];

src/lxc/cgroup.h

@@ -26,8 +26,8 @@
 #define MAXPRIOLEN 24
 
 struct lxc_handler;
-int lxc_rename_nsgroup(const char *name, pid_t pid);
-int lxc_unlink_nsgroup(const char *name);
+int lxc_cgroup_create(const char *name, pid_t pid);
+int lxc_cgroup_destroy(const char *name);
 int lxc_cgroup_path_get(char **path, const char *name);
 int lxc_cgroup_nrtasks(const char *name);
 #endif

src/lxc/lxc_unshare.c

@@ -214,7 +214,7 @@ int main(int argc, char *argv[])
 		ERROR("pid_name: failed to allocate memory");
 		return -1;
 	}
-	lxc_unlink_nsgroup(pid_name);
+	lxc_cgroup_destroy(pid_name);
 	free(pid_name);
 
 	return  lxc_error_set_and_log(pid, status);

src/lxc/start.c

@@ -506,7 +506,7 @@ int lxc_spawn(struct lxc_handler *handler)
 	if (lxc_sync_wait_child(handler, LXC_SYNC_CONFIGURE))
 		failed_before_rename = 1;
 
-	if (lxc_rename_nsgroup(name, handler->pid))
+	if (lxc_cgroup_create(name, handler->pid))
 		goto out_delete_net;
 
 	if (failed_before_rename)
@@ -585,7 +585,7 @@ int __lxc_start(const char *name, struct lxc_conf *conf,
 out_fini:
 	LXC_TTY_DEL_HANDLER(SIGQUIT);
 	LXC_TTY_DEL_HANDLER(SIGINT);
-	lxc_unlink_nsgroup(name);
+	lxc_cgroup_destroy(name);
 	lxc_fini(name, handler);
 	return err;