Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial

[safe/jmp/linux-2.6] / net / sched / sch_netem.c

diff --git a/net/sched/sch_netem.c b/net/sched/sch_netem.c
index f840d6b..d8b10e0 100644 (file)
--- a/net/sched/sch_netem.c
+++ b/net/sched/sch_netem.c
@@ -46,9 +46,6 @@
         layering other disciplines.  It does not need to do bandwidth
         control either since that can be handled by using token
         bucket or other rate control.
-
-        The simulator is limited by the Linux timer resolution
-        and will create packet bursts on the HZ boundary (1ms).
 */
 
 struct netem_sched_data {
@@ -202,9 +199,9 @@ static int netem_enqueue(struct sk_buff *skb, struct Qdisc *sch)
         * do it now in software before we mangle it.
         */
        if (q->corrupt && q->corrupt >= get_crandom(&q->corrupt_cor)) {
-               if (!(skb = skb_unshare(skb, GFP_ATOMIC))
-                   || (skb->ip_summed == CHECKSUM_PARTIAL
-                       && skb_checksum_help(skb))) {
+               if (!(skb = skb_unshare(skb, GFP_ATOMIC)) ||
+                   (skb->ip_summed == CHECKSUM_PARTIAL &&
+                    skb_checksum_help(skb))) {
                        sch->qstats.drops++;
                        return NET_XMIT_DROP;
                }
@@ -213,9 +210,9 @@ 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->reorder < get_crandom(&q->reorder_cor)) {
+       if (q->gap == 0 ||              /* not doing reordering */
+           q->counter < q->gap ||      /* inside last reordering gap */
+           q->reorder < get_crandom(&q->reorder_cor)) {
                psched_time_t now;
                psched_tdiff_t delay;
 
@@ -269,7 +266,6 @@ static struct sk_buff *netem_dequeue(struct Qdisc *sch)
        struct netem_sched_data *q = qdisc_priv(sch);
        struct sk_buff *skb;
 
-       smp_mb();
        if (sch->flags & TCQ_F_THROTTLED)
                return NULL;
 
@@ -284,6 +280,14 @@ static struct sk_buff *netem_dequeue(struct Qdisc *sch)
                        if (unlikely(!skb))
                                return NULL;
 
+#ifdef CONFIG_NET_CLS_ACT
+                       /*
+                        * If it's at ingress let's pretend the delay is
+                        * from the network (tstamp will be updated).
+                        */
+                       if (G_TC_FROM(skb->tc_verd) & AT_INGRESS)
+                               skb->tstamp.tv64 = 0;
+#endif
                        pr_debug("netem_dequeue: return skb=%p\n", skb);
                        sch->q.qlen--;
                        return skb;