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authorDavid S. Miller <davem@davemloft.net>2012-02-06 15:14:37 -0500
committerDavid S. Miller <davem@davemloft.net>2012-02-09 13:50:34 -0500
commit16bda13d90c8d5da243e2cfa1677e62ecce26860 (patch)
treed10c9e0f9b043170c5bba4599ab1dc006d2a76eb /include
parent9cc00b51a3cbb3b933065a55eaa9bfc306411b7a (diff)
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')
-rw-r--r--include/net/sch_generic.h9
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;