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-rw-r--r--include/net/flow.h95
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