xs_rm
xs_rm(XST_NIL, xenbus_get_node(dev), "feature-gso-tcpv4");
xs_rm(XST_NIL, xenbus_get_node(dev), "feature-no-csum-offload");
error = xs_rm(xbt, cur_path, dir[i]);
error = xs_rm(xbt, cur_path, "");
xs_rm(XST_NIL, xenbus_get_node(child), "hotplug-status");
int xs_rm(struct xs_transaction t, const char *dir, const char *node);