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sch_cake: Fix tin order when set through skb->priority 

In diffserv mode, CAKE stores tins in a different order internally than
the logical order exposed to userspace. The order remapping was missing
in the handling of 'tc filter' priority mappings through skb->priority,
resulting in bulk and best effort mappings being reversed relative to
how they are displayed.

Fix this by adding the missing mapping when reading skb->priority.

Fixes: 83f8fd69af ("sch_cake: Add DiffServ handling")
Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Toke Høiland-Jørgensen 2018-07-16 16:45:09 +02:00 committed by David S. Miller
parent 1eb94d441f
commit 301f935be9
1 changed files with 1 additions and 1 deletions
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2
net/sched/sch_cake.c
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@ -1546,7 +1546,7 @@ static struct cake_tin_data *cake_select_tin(struct Qdisc *sch,
if (TC_H_MAJ(skb->priority) == sch->handle &&
TC_H_MIN(skb->priority) > 0 &&
TC_H_MIN(skb->priority) <= q->tin_cnt) {
tin = TC_H_MIN(skb->priority) - 1;
tin = q->tin_order[TC_H_MIN(skb->priority) - 1];
if (q->rate_flags & CAKE_FLAG_WASH)
cake_wash_diffserv(skb);