[PKT_SCHED]: vlan tag match
Provide a way to use tc filters on vlan tag even if tag is buried in
skb due to hardware acceleration.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/pkt_cls.h b/include/linux/pkt_cls.h
index 1c1dba9..40fac8c 100644
--- a/include/linux/pkt_cls.h
+++ b/include/linux/pkt_cls.h
@@ -459,7 +459,8 @@
#define TCF_EM_U32 3
#define TCF_EM_META 4
#define TCF_EM_TEXT 5
-#define TCF_EM_MAX 5
+#define TCF_EM_VLAN 6
+#define TCF_EM_MAX 6
enum
{
diff --git a/include/linux/tc_ematch/tc_em_meta.h b/include/linux/tc_ematch/tc_em_meta.h
index e21937c..c50d2ba 100644
--- a/include/linux/tc_ematch/tc_em_meta.h
+++ b/include/linux/tc_ematch/tc_em_meta.h
@@ -81,6 +81,7 @@
TCF_META_ID_SK_SNDTIMEO,
TCF_META_ID_SK_SENDMSG_OFF,
TCF_META_ID_SK_WRITE_PENDING,
+ TCF_META_ID_VLAN_TAG,
__TCF_META_ID_MAX
};
#define TCF_META_ID_MAX (__TCF_META_ID_MAX - 1)
diff --git a/net/sched/em_meta.c b/net/sched/em_meta.c
index a1e5619..9c2ec19 100644
--- a/net/sched/em_meta.c
+++ b/net/sched/em_meta.c
@@ -65,6 +65,7 @@
#include <linux/string.h>
#include <linux/skbuff.h>
#include <linux/random.h>
+#include <linux/if_vlan.h>
#include <linux/tc_ematch/tc_em_meta.h>
#include <net/dst.h>
#include <net/route.h>
@@ -170,6 +171,21 @@
}
/**************************************************************************
+ * vlan tag
+ **************************************************************************/
+
+META_COLLECTOR(int_vlan_tag)
+{
+ unsigned short tag;
+ if (vlan_get_tag(skb, &tag) < 0)
+ *err = -1;
+ else
+ dst->value = tag;
+}
+
+
+
+/**************************************************************************
* skb attributes
**************************************************************************/
@@ -520,6 +536,7 @@
[META_ID(SK_SNDTIMEO)] = META_FUNC(int_sk_sndtimeo),
[META_ID(SK_SENDMSG_OFF)] = META_FUNC(int_sk_sendmsg_off),
[META_ID(SK_WRITE_PENDING)] = META_FUNC(int_sk_write_pend),
+ [META_ID(VLAN_TAG)] = META_FUNC(int_vlan_tag),
}
};
