Function pf_remove_if_empty_kruleset

freebsd/netpfil/pf/pf_ruleset.c:255–281

}

void
pf_remove_if_empty_kruleset(struct pf_kruleset *ruleset)
{
	struct pf_kanchor	*parent;
	int			 i;

	while (ruleset != NULL) {
		if (ruleset == &pf_main_ruleset || ruleset->anchor == NULL ||
		    !RB_EMPTY(&ruleset->anchor->children) ||
		    ruleset->anchor->refcnt > 0 || ruleset->tables > 0 ||
		    ruleset->topen)
			return;
		for (i = 0; i < PF_RULESET_MAX; ++i)
			if (!TAILQ_EMPTY(ruleset->rules[i].active.ptr) ||
			    !TAILQ_EMPTY(ruleset->rules[i].inactive.ptr) ||
			    ruleset->rules[i].inactive.open)
				return;
		RB_REMOVE(pf_kanchor_global, &V_pf_anchors, ruleset->anchor);
		if ((parent = ruleset->anchor->parent) != NULL)
			RB_REMOVE(pf_kanchor_node, &parent->children,
			    ruleset->anchor);
		rs_free(ruleset->anchor);
		if (parent == NULL)
			return;
		ruleset = &parent->ruleset;
	}
}

int
pf_kanchor_setup(struct pf_krule *r, const struct pf_kruleset *s,