pkt_sched: Check .walk and .leaf class handlers

Require qdisc class ops .walk and .leaf for classful qdisc in register_qdisc(). The checks could be done later insted, but these ops are really needed and used by most of classful qdiscs. Signed-off-by: Jarek Poplawski <[email protected]> Signed-off-by: David S. Miller <[email protected]>
liveeasily · Aug 11, 2010 · 3e9e5a5 · 3e9e5a5
1 parent 41065fb
commit 3e9e5a5
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
@@ -161,7 +161,7 @@ int register_qdisc(struct Qdisc_ops *qops)
 	if (qops->cl_ops) {
 		const struct Qdisc_class_ops *cops = qops->cl_ops;
 
-		if (!(cops->get && cops->put))
+		if (!(cops->get && cops->put && cops->walk && cops->leaf))
 			goto out_einval;
 
 		if (cops->tcf_chain && !(cops->bind_tcf && cops->unbind_tcf))