From 3113e88c3cb3c0a22920b621f8e4d1f2ccc07f1e Mon Sep 17 00:00:00 2001
From: Stephen Hemminger <shemminger@vyatta.com>
Date: Tue, 5 Feb 2008 03:20:13 -0800
Subject: [PATCH] [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>
---
include/linux/pkt_cls.h | 3 ++-
include/linux/tc_ematch/tc_em_meta.h | 1 +
net/sched/em_meta.c | 17 +++++++++++++++++
3 files changed, 20 insertions(+), 1 deletion(-)
diff --git a/include/linux/pkt_cls.h b/include/linux/pkt_cls.h
index 1c1dba9ea5fb..40fac8c4559d 100644
--- a/include/linux/pkt_cls.h
+++ b/include/linux/pkt_cls.h
@@ -459,7 +459,8 @@ enum
#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 e21937cf91d0..c50d2ba5caf0 100644
--- a/include/linux/tc_ematch/tc_em_meta.h
+++ b/include/linux/tc_ematch/tc_em_meta.h
@@ -81,6 +81,7 @@ enum
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 a1e5619b1876..9c2ec1992a2a 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>
@@ -169,6 +170,21 @@ META_COLLECTOR(var_dev)
*err = var_dev(skb->dev, dst);
}
+/**************************************************************************
+ * 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 @@ static struct meta_ops __meta_ops[TCF_META_TYPE_MAX+1][TCF_META_ID_MAX+1] = {
[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),
}
};
--
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