1 files changed, 95 insertions, 0 deletions
diff --git a/include/net/flow.h b/include/net/flow.h
new file mode 100644
index 000000000000..9a5c94b1a0ec
--- /dev/null
+++ b/include/net/flow.h
@@ -0,0 +1,95 @@
+/*
+ *
+ *	Generic internet FLOW.
+ *
+ */
+
+#ifndef _NET_FLOW_H
+#define _NET_FLOW_H
+
+#include <linux/in6.h>
+#include <asm/atomic.h>
+
+struct flowi {
+	int	oif;
+	int	iif;
+
+	union {
+		struct {
+			__u32			daddr;
+			__u32			saddr;
+			__u32			fwmark;
+			__u8			tos;
+			__u8			scope;
+		} ip4_u;
+		
+		struct {
+			struct in6_addr		daddr;
+			struct in6_addr		saddr;
+			__u32			flowlabel;
+		} ip6_u;
+
+		struct {
+			__u16			daddr;
+			__u16			saddr;
+			__u32			fwmark;
+			__u8			scope;
+		} dn_u;
+	} nl_u;
+#define fld_dst		nl_u.dn_u.daddr
+#define fld_src		nl_u.dn_u.saddr
+#define fld_fwmark	nl_u.dn_u.fwmark
+#define fld_scope	nl_u.dn_u.scope
+#define fl6_dst		nl_u.ip6_u.daddr
+#define fl6_src		nl_u.ip6_u.saddr
+#define fl6_flowlabel	nl_u.ip6_u.flowlabel
+#define fl4_dst		nl_u.ip4_u.daddr
+#define fl4_src		nl_u.ip4_u.saddr
+#define fl4_fwmark	nl_u.ip4_u.fwmark
+#define fl4_tos		nl_u.ip4_u.tos
+#define fl4_scope	nl_u.ip4_u.scope
+
+	__u8	proto;
+	__u8	flags;
+#define FLOWI_FLAG_MULTIPATHOLDROUTE 0x01
+	union {
+		struct {
+			__u16	sport;
+			__u16	dport;
+		} ports;
+
+		struct {
+			__u8	type;
+			__u8	code;
+		} icmpt;
+
+		struct {
+			__u16	sport;
+			__u16	dport;
+			__u8	objnum;
+			__u8	objnamel; /* Not 16 bits since max val is 16 */
+			__u8	objname[16]; /* Not zero terminated */
+		} dnports;
+
+		__u32		spi;
+	} uli_u;
+#define fl_ip_sport	uli_u.ports.sport
+#define fl_ip_dport	uli_u.ports.dport
+#define fl_icmp_type	uli_u.icmpt.type
+#define fl_icmp_code	uli_u.icmpt.code
+#define fl_ipsec_spi	uli_u.spi
+} __attribute__((__aligned__(BITS_PER_LONG/8)));
+
+#define FLOW_DIR_IN	0
+#define FLOW_DIR_OUT	1
+#define FLOW_DIR_FWD	2
+
+typedef void (*flow_resolve_t)(struct flowi *key, u16 family, u8 dir,
+			       void **objp, atomic_t **obj_refp);
+
+extern void *flow_cache_lookup(struct flowi *key, u16 family, u8 dir,
+			       flow_resolve_t resolver);
+extern void flow_cache_flush(void);
+extern atomic_t flow_cache_genid;
+
+#endif