[PATCH ] netem: Fix off-by-one bug in reordering
From: Vijay Subramanian <hidden>
Date: 2012-01-19 20:16:36
Subsystem:
netem network emulator, networking [general], tc subsystem, the rest · Maintainers:
Stephen Hemminger, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Jamal Hadi Salim, Jiri Pirko, Linus Torvalds
With netem reordering, a gap of N is supposed to reorder every Nth packet with given reorder probability. However, the code currently skips N packets and reorders every (N+1)th packet. Signed-off-by: Vijay Subramanian <redacted> --- net/sched/sch_netem.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/net/sched/sch_netem.c b/net/sched/sch_netem.c
index e7e1d0b..2776012 100644
--- a/net/sched/sch_netem.c
+++ b/net/sched/sch_netem.c@@ -419,7 +419,7 @@ static int netem_enqueue(struct sk_buff *skb, struct Qdisc *sch) cb = netem_skb_cb(skb); if (q->gap == 0 || /* not doing reordering */ - q->counter < q->gap || /* inside last reordering gap */ + q->counter < q->gap - 1 || /* inside last reordering gap */ q->reorder < get_crandom(&q->reorder_cor)) { psched_time_t now; psched_tdiff_t delay;
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1.7.0.4