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authorGovindarajulu Varadarajan <_govind@gmx.com>2014-06-23 16:07:58 +0530
committerDavid S. Miller <davem@davemloft.net>2014-06-23 14:32:19 -0700
commite0f31d8498676fda36289603a054d0d490aa2679 (patch)
tree372fb95e9ec90a83794bf5bb3747f80664bb8e55 /include
parenteef929622b0ce86fcdaf6bd9ab6d7502470728d5 (diff)
flow_keys: Record IP layer protocol in skb_flow_dissect()
skb_flow_dissect() dissects only transport header type in ip_proto. It dose not give any information about IPv4 or IPv6. This patch adds new member, n_proto, to struct flow_keys. Which records the IP layer type. i.e IPv4 or IPv6. This can be used in netdev->ndo_rx_flow_steer driver function to dissect flow. Adding new member to flow_keys increases the struct size by around 4 bytes. This causes BUILD_BUG_ON(sizeof(qcb->data) < sz); to fail in qdisc_cb_private_validate() So increase data size by 4 Signed-off-by: Govindarajulu Varadarajan <_govind@gmx.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/net/flow_keys.h14
-rw-r--r--include/net/sch_generic.h2
2 files changed, 15 insertions, 1 deletions
diff --git a/include/net/flow_keys.h b/include/net/flow_keys.h
index 7e64bd8bbda9..fbefdca5e283 100644
--- a/include/net/flow_keys.h
+++ b/include/net/flow_keys.h
@@ -1,6 +1,19 @@
#ifndef _NET_FLOW_KEYS_H
#define _NET_FLOW_KEYS_H
+/* struct flow_keys:
+ * @src: source ip address in case of IPv4
+ * For IPv6 it contains 32bit hash of src address
+ * @dst: destination ip address in case of IPv4
+ * For IPv6 it contains 32bit hash of dst address
+ * @ports: port numbers of Transport header
+ * port16[0]: src port number
+ * port16[1]: dst port number
+ * @thoff: Transport header offset
+ * @n_proto: Network header protocol (eg. IPv4/IPv6)
+ * @ip_proto: Transport header protocol (eg. TCP/UDP)
+ * All the members, except thoff, are in network byte order.
+ */
struct flow_keys {
/* (src,dst) must be grouped, in the same way than in IP header */
__be32 src;
@@ -10,6 +23,7 @@ struct flow_keys {
__be16 port16[2];
};
u16 thoff;
+ u16 n_proto;
u8 ip_proto;
};
diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
index 624f9857c83e..a3cfb8ebeb53 100644
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -231,7 +231,7 @@ struct qdisc_skb_cb {
unsigned int pkt_len;
u16 slave_dev_queue_mapping;
u16 _pad;
- unsigned char data[20];
+ unsigned char data[24];
};
static inline void qdisc_cb_private_validate(const struct sk_buff *skb, int sz)