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author | David S. Miller <davem@davemloft.net> | 2012-02-06 21:14:37 +0100 |
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committer | David S. Miller <davem@davemloft.net> | 2012-02-06 21:14:37 +0100 |
commit | a0417fa3a18a14be1f4d9cffcf378a7c42d92a91 (patch) | |
tree | 4606685ea5ab5ebe33ad4335dc004c66ea31bdc2 /include/net | |
parent | netdev: ethernet dev_alloc_skb to netdev_alloc_skb (diff) | |
download | linux-a0417fa3a18a14be1f4d9cffcf378a7c42d92a91.tar.xz linux-a0417fa3a18a14be1f4d9cffcf378a7c42d92a91.zip |
net: Make qdisc_skb_cb upper size bound explicit.
Just like skb->cb[], so that qdisc_skb_cb can be encapsulated inside
of other data structures.
This is intended to be used by IPoIB so that it can remember
addressing information stored at hard_header_ops->create() time that
it can fetch when the packet gets to the transmit routine.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
-rw-r--r-- | include/net/sch_generic.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h index f6bb08b73ca4..55ce96b53b09 100644 --- a/include/net/sch_generic.h +++ b/include/net/sch_generic.h @@ -220,9 +220,16 @@ struct tcf_proto { struct qdisc_skb_cb { unsigned int pkt_len; - long data[]; + unsigned char data[24]; }; +static inline void qdisc_cb_private_validate(const struct sk_buff *skb, int sz) +{ + struct qdisc_skb_cb *qcb; + BUILD_BUG_ON(sizeof(skb->cb) < sizeof(unsigned int) + sz); + BUILD_BUG_ON(sizeof(qcb->data) < sz); +} + static inline int qdisc_qlen(const struct Qdisc *q) { return q->q.qlen; |