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authorEric Dumazet <edumazet@google.com>2014-09-18 08:02:05 -0700
committerDavid S. Miller <davem@davemloft.net>2014-09-22 14:21:47 -0400
commit257117862634d89de33fec74858b1a0ba5ab444b (patch)
tree799321753c9f5ac9358c708bced556df7e309772 /include
parent476c18850c6cbaa3f2bb661ae9710645081563b9 (diff)
downloadlinux-linaro-stable-257117862634d89de33fec74858b1a0ba5ab444b.tar.gz
net: sched: shrink struct qdisc_skb_cb to 28 bytes
We cannot make struct qdisc_skb_cb bigger without impacting IPoIB, or increasing skb->cb[] size. Commit e0f31d849867 ("flow_keys: Record IP layer protocol in skb_flow_dissect()") broke IPoIB. Only current offender is sch_choke, and this one do not need an absolutely precise flow key. If we store 17 bytes of flow key, its more than enough. (Its the actual size of flow_keys if it was a packed structure, but we might add new fields at the end of it later) Signed-off-by: Eric Dumazet <edumazet@google.com> Fixes: e0f31d849867 ("flow_keys: Record IP layer protocol in skb_flow_dissect()") Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/net/sch_generic.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
index a3cfb8ebeb53..620e086c0cbe 100644
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -231,7 +231,8 @@ struct qdisc_skb_cb {
unsigned int pkt_len;
u16 slave_dev_queue_mapping;
u16 _pad;
- unsigned char data[24];
+#define QDISC_CB_PRIV_LEN 20
+ unsigned char data[QDISC_CB_PRIV_LEN];
};
static inline void qdisc_cb_private_validate(const struct sk_buff *skb, int sz)