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pkt_sched: Check .walk and .leaf class handlers

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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 <jarkao2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jarek Poplawski 2010-08-10 22:31:20 +00:00 committed by David S. Miller
parent 41065fba84
commit 3e9e5a5921
1 changed files with 1 additions and 1 deletions
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2
net/sched/sch_api.c
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@ -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))