net: sched: optimize class dumps

[mirror_ubuntu-artful-kernel.git] / net / sched / sch_api.c

diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index bbe57d57b67fd498692bd41db49147511f1bb091..e88342fde1bc409aed6a3c86e7a628030eaac66f 100644 (file)
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -1831,6 +1831,12 @@ static int tc_dump_tclass_root(struct Qdisc *root, struct sk_buff *skb,
        if (!qdisc_dev(root))
                return 0;
 
+       if (tcm->tcm_parent) {
+               q = qdisc_match_from_root(root, TC_H_MAJ(tcm->tcm_parent));
+               if (q && tc_dump_tclass_qdisc(q, skb, tcm, cb, t_p, s_t) < 0)
+                       return -1;
+               return 0;
+       }
        hash_for_each(qdisc_dev(root)->qdisc_hash, b, q, hash) {
                if (tc_dump_tclass_qdisc(q, skb, tcm, cb, t_p, s_t) < 0)
                        return -1;