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net_sched: Add size table for qdiscs

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Add size table functions for qdiscs and calculate packet size in
qdisc_enqueue().

Based on patch by Patrick McHardy
 http://marc.info/?l=linux-netdev&m=115201979221729&w=2

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@mbnet.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jussi Kivilinna
2008-07-20 00:08:47 -07:00
committed by David S. Miller
parent 0abf77e55a
commit 175f9c1bba
7 changed files with 199 additions and 5 deletions
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5
net/sched/sch_netem.c
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@@ -84,8 +84,9 @@ struct netem_skb_cb {
static inline struct netem_skb_cb *netem_skb_cb(struct sk_buff *skb)
{
BUILD_BUG_ON(sizeof(skb->cb) < sizeof(struct netem_skb_cb));
return (struct netem_skb_cb *)skb->cb;
BUILD_BUG_ON(sizeof(skb->cb) <
sizeof(struct qdisc_skb_cb) + sizeof(struct netem_skb_cb));
return (struct netem_skb_cb *)qdisc_skb_cb(skb)->data;
}
/* init_crandom - initialize correlated random number generator