Merge branch 'ife-to-module'

Yotam Gigi says:

====================
Extract IFE logic to module

Extract ife logic from the tc_ife action into an independent module, and
make the tc_ife action use it. This way, the ife encapsulation can be used
by other modules other than tc_ife action.

v1->v2:
Fix duplicate symbol error by introducing a new patch that makes the
original symbol static.

The symbol ife_tlv_meta_extract is exported in act_ife, though not being
used by any other module. As the symbol is being moved to the new ife
module, introducing the new module creates duplicate symbol. To fix it,
add a new patch (1/3) that makes the ife_tlv_meta_extract symbol static in
act_ife, thus the symbol does not collide.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

5 files changed, 71 insertions, 12 deletions

diff --git a/include/net/ife.h b/include/net/ife.h
new file mode 100644
index 000000000000..2d87d6898b0a
--- /dev/null
+++ b/include/net/ife.h
@@ -0,0 +1,51 @@
+#ifndef __NET_IFE_H
+#define __NET_IFE_H
+
+#include <linux/etherdevice.h>
+#include <linux/rtnetlink.h>
+#include <linux/module.h>
+#include <uapi/linux/ife.h>
+
+#if IS_ENABLED(CONFIG_NET_IFE)
+
+void *ife_encode(struct sk_buff *skb, u16 metalen);
+void *ife_decode(struct sk_buff *skb, u16 *metalen);
+
+void *ife_tlv_meta_decode(void *skbdata, u16 *attrtype, u16 *dlen, u16 *totlen);
+int ife_tlv_meta_encode(void *skbdata, u16 attrtype, u16 dlen,
+			const void *dval);
+
+void *ife_tlv_meta_next(void *skbdata);
+
+#else
+
+static inline void *ife_encode(struct sk_buff *skb, u16 metalen)
+{
+	return NULL;
+}
+
+static inline void *ife_decode(struct sk_buff *skb, u16 *metalen)
+{
+	return NULL;
+}
+
+static inline void *ife_tlv_meta_decode(void *skbdata, u16 *attrtype, u16 *dlen,
+					u16 *totlen)
+{
+	return NULL;
+}
+
+static inline int ife_tlv_meta_encode(void *skbdata, u16 attrtype, u16 dlen,
+			const void *dval)
+{
+	return 0;
+}
+
+static inline void *ife_tlv_meta_next(void *skbdata)
+{
+	return NULL;
+}
+
+#endif
+
+#endif /* __NET_IFE_H */
diff --git a/include/net/tc_act/tc_ife.h b/include/net/tc_act/tc_ife.h
index 9fd2bea0a6e0..30ba459ddd34 100644
--- a/include/net/tc_act/tc_ife.h
+++ b/include/net/tc_act/tc_ife.h
@@ -6,7 +6,6 @@
 #include <linux/rtnetlink.h>
 #include <linux/module.h>
 
-#define IFE_METAHDRLEN 2
 struct tcf_ife_info {
 	struct tc_action common;
 	u8 eth_dst[ETH_ALEN];
@@ -45,8 +44,6 @@ struct tcf_meta_ops {
 
 int ife_get_meta_u32(struct sk_buff *skb, struct tcf_meta_info *mi);
 int ife_get_meta_u16(struct sk_buff *skb, struct tcf_meta_info *mi);
-int ife_tlv_meta_encode(void *skbdata, u16 attrtype, u16 dlen,
-			const void *dval);
 int ife_alloc_meta_u32(struct tcf_meta_info *mi, void *metaval, gfp_t gfp);
 int ife_alloc_meta_u16(struct tcf_meta_info *mi, void *metaval, gfp_t gfp);
 int ife_check_meta_u32(u32 metaval, struct tcf_meta_info *mi);
diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild
index 486e050e64c5..a2e90722a4c4 100644
--- a/include/uapi/linux/Kbuild
+++ b/include/uapi/linux/Kbuild
@@ -195,6 +195,7 @@ header-y += if_tun.h
 header-y += if_tunnel.h
 header-y += if_vlan.h
 header-y += if_x25.h
+header-y += ife.h
 header-y += igmp.h
 header-y += ila.h
 header-y += in6.h
diff --git a/include/uapi/linux/ife.h b/include/uapi/linux/ife.h
new file mode 100644
index 000000000000..2954da32e012
--- /dev/null
+++ b/include/uapi/linux/ife.h
@@ -0,0 +1,18 @@
+#ifndef __UAPI_IFE_H
+#define __UAPI_IFE_H
+
+#define IFE_METAHDRLEN 2
+
+enum {
+	IFE_META_SKBMARK = 1,
+	IFE_META_HASHID,
+	IFE_META_PRIO,
+	IFE_META_QMAP,
+	IFE_META_TCINDEX,
+	__IFE_META_MAX
+};
+
+/*Can be overridden at runtime by module option*/
+#define IFE_META_MAX (__IFE_META_MAX - 1)
+
+#endif
diff --git a/include/uapi/linux/tc_act/tc_ife.h b/include/uapi/linux/tc_act/tc_ife.h
index cd18360eca24..7c2817866c97 100644
--- a/include/uapi/linux/tc_act/tc_ife.h
+++ b/include/uapi/linux/tc_act/tc_ife.h
@@ -3,6 +3,7 @@
 
 #include <linux/types.h>
 #include <linux/pkt_cls.h>
+#include <linux/ife.h>
 
 #define TCA_ACT_IFE 25
 /* Flag bits for now just encoding/decoding; mutually exclusive */
@@ -28,13 +29,4 @@ enum {
 };
 #define TCA_IFE_MAX (__TCA_IFE_MAX - 1)
 
-#define IFE_META_SKBMARK 1
-#define IFE_META_HASHID 2
-#define	IFE_META_PRIO 3
-#define	IFE_META_QMAP 4
-#define	IFE_META_TCINDEX 5
-/*Can be overridden at runtime by module option*/
-#define	__IFE_META_MAX 6
-#define IFE_META_MAX (__IFE_META_MAX - 1)
-
 #endif