net_sched: make cls_ops->tcf_chain() optional
Some qdiscs don't support attaching filters. Handle this centrally in cls_api and return a proper errno code (EOPNOTSUPP) instead of EINVAL. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
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committed by
David S. Miller
parent
c9f1d0389b
commit
71ebe5e919
@@ -433,11 +433,6 @@ static void tbf_walk(struct Qdisc *sch, struct qdisc_walker *walker)
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}
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}
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static struct tcf_proto **tbf_find_tcf(struct Qdisc *sch, unsigned long cl)
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{
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return NULL;
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}
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static const struct Qdisc_class_ops tbf_class_ops =
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{
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.graft = tbf_graft,
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@@ -447,7 +442,6 @@ static const struct Qdisc_class_ops tbf_class_ops =
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.change = tbf_change_class,
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.delete = tbf_delete,
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.walk = tbf_walk,
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.tcf_chain = tbf_find_tcf,
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.dump = tbf_dump_class,
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};
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