3 * Generic internet FLOW.
10 #include <linux/in6.h>
11 #include <asm/atomic.h>
21 #define FLOWI_FLAG_ANYSRC 0x01
22 #define FLOWI_FLAG_PRECOW_METRICS 0x02
23 #define FLOWI_FLAG_CAN_SLEEP 0x04
33 struct in6_addr daddr;
34 struct in6_addr saddr;
44 #define fld_dst nl_u.dn_u.daddr
45 #define fld_src nl_u.dn_u.saddr
46 #define fld_scope nl_u.dn_u.scope
47 #define fl6_dst nl_u.ip6_u.daddr
48 #define fl6_src nl_u.ip6_u.saddr
49 #define fl6_flowlabel nl_u.ip6_u.flowlabel
50 #define fl4_dst nl_u.ip4_u.daddr
51 #define fl4_src nl_u.ip4_u.saddr
53 #define fl4_scope scope
78 #define fl_ip_sport uli_u.ports.sport
79 #define fl_ip_dport uli_u.ports.dport
80 #define fl_icmp_type uli_u.icmpt.type
81 #define fl_icmp_code uli_u.icmpt.code
82 #define fl_ipsec_spi uli_u.spi
83 #define fl_mh_type uli_u.mht.type
84 #define fl_gre_key uli_u.gre_key
85 } __attribute__((__aligned__(BITS_PER_LONG/8)));
88 #define FLOW_DIR_OUT 1
89 #define FLOW_DIR_FWD 2
93 struct flow_cache_ops;
95 struct flow_cache_object {
96 const struct flow_cache_ops *ops;
99 struct flow_cache_ops {
100 struct flow_cache_object *(*get)(struct flow_cache_object *);
101 int (*check)(struct flow_cache_object *);
102 void (*delete)(struct flow_cache_object *);
105 typedef struct flow_cache_object *(*flow_resolve_t)(
106 struct net *net, const struct flowi *key, u16 family,
107 u8 dir, struct flow_cache_object *oldobj, void *ctx);
109 extern struct flow_cache_object *flow_cache_lookup(
110 struct net *net, const struct flowi *key, u16 family,
111 u8 dir, flow_resolve_t resolver, void *ctx);
113 extern void flow_cache_flush(void);
114 extern atomic_t flow_cache_genid;
116 static inline int flow_cache_uli_match(const struct flowi *fl1,
117 const struct flowi *fl2)
119 return (fl1->proto == fl2->proto &&
120 !memcmp(&fl1->uli_u, &fl2->uli_u, sizeof(fl1->uli_u)));