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net_sched: fix class grafting errno codes

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If the parent qdisc doesn't support classes, use EOPNOTSUPP.
If the parent class doesn't exist, use ENOENT. Currently EINVAL
is returned in both cases.

Additionally check whether grafting is supported and remove a now
unnecessary graft function from sch_ingress.

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Patrick McHardy
2009-09-04 06:41:13 +00:00
committed by David S. Miller
parent b1f5719558
commit c9f1d0389b
2 changed files with 4 additions and 11 deletions
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8
net/sched/sch_api.c
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@@ -728,14 +728,14 @@ static int qdisc_graft(struct net_device *dev, struct Qdisc *parent,
} else {
const struct Qdisc_class_ops *cops = parent->ops->cl_ops;
err = -EINVAL;
if (cops) {
err = -EOPNOTSUPP;
if (cops && cops->graft) {
unsigned long cl = cops->get(parent, classid);
if (cl) {
err = cops->graft(parent, cl, new, &old);
cops->put(parent, cl);
}
} else
err = -ENOENT;
}
if (!err)
notify_and_destroy(skb, n, classid, old, new);