3 * Generic internet FLOW.
10 #include <linux/socket.h>
11 #include <linux/in6.h>
12 #include <linux/atomic.h>
22 #define FLOWI_FLAG_ANYSRC 0x01
23 #define FLOWI_FLAG_PRECOW_METRICS 0x02
24 #define FLOWI_FLAG_CAN_SLEEP 0x04
53 struct flowi_common __fl_common;
54 #define flowi4_oif __fl_common.flowic_oif
55 #define flowi4_iif __fl_common.flowic_iif
56 #define flowi4_mark __fl_common.flowic_mark
57 #define flowi4_tos __fl_common.flowic_tos
58 #define flowi4_scope __fl_common.flowic_scope
59 #define flowi4_proto __fl_common.flowic_proto
60 #define flowi4_flags __fl_common.flowic_flags
61 #define flowi4_secid __fl_common.flowic_secid
63 /* (saddr,daddr) must be grouped, same order as in IP header */
68 #define fl4_sport uli.ports.sport
69 #define fl4_dport uli.ports.dport
70 #define fl4_icmp_type uli.icmpt.type
71 #define fl4_icmp_code uli.icmpt.code
72 #define fl4_ipsec_spi uli.spi
73 #define fl4_mh_type uli.mht.type
74 #define fl4_gre_key uli.gre_key
75 } __attribute__((__aligned__(BITS_PER_LONG/8)));
77 static inline void flowi4_init_output(struct flowi4 *fl4, int oif,
78 __u32 mark, __u8 tos, __u8 scope,
79 __u8 proto, __u8 flags,
80 __be32 daddr, __be32 saddr,
81 __be16 dport, __be32 sport)
83 fl4->flowi4_oif = oif;
85 fl4->flowi4_mark = mark;
86 fl4->flowi4_tos = tos;
87 fl4->flowi4_scope = scope;
88 fl4->flowi4_proto = proto;
89 fl4->flowi4_flags = flags;
90 fl4->flowi4_secid = 0;
93 fl4->fl4_dport = dport;
94 fl4->fl4_sport = sport;
99 struct flowi_common __fl_common;
100 #define flowi6_oif __fl_common.flowic_oif
101 #define flowi6_iif __fl_common.flowic_iif
102 #define flowi6_mark __fl_common.flowic_mark
103 #define flowi6_tos __fl_common.flowic_tos
104 #define flowi6_scope __fl_common.flowic_scope
105 #define flowi6_proto __fl_common.flowic_proto
106 #define flowi6_flags __fl_common.flowic_flags
107 #define flowi6_secid __fl_common.flowic_secid
108 struct in6_addr daddr;
109 struct in6_addr saddr;
112 #define fl6_sport uli.ports.sport
113 #define fl6_dport uli.ports.dport
114 #define fl6_icmp_type uli.icmpt.type
115 #define fl6_icmp_code uli.icmpt.code
116 #define fl6_ipsec_spi uli.spi
117 #define fl6_mh_type uli.mht.type
118 #define fl6_gre_key uli.gre_key
119 } __attribute__((__aligned__(BITS_PER_LONG/8)));
122 struct flowi_common __fl_common;
123 #define flowidn_oif __fl_common.flowic_oif
124 #define flowidn_iif __fl_common.flowic_iif
125 #define flowidn_mark __fl_common.flowic_mark
126 #define flowidn_scope __fl_common.flowic_scope
127 #define flowidn_proto __fl_common.flowic_proto
128 #define flowidn_flags __fl_common.flowic_flags
132 #define fld_sport uli.ports.sport
133 #define fld_dport uli.ports.dport
134 } __attribute__((__aligned__(BITS_PER_LONG/8)));
138 struct flowi_common __fl_common;
143 #define flowi_oif u.__fl_common.flowic_oif
144 #define flowi_iif u.__fl_common.flowic_iif
145 #define flowi_mark u.__fl_common.flowic_mark
146 #define flowi_tos u.__fl_common.flowic_tos
147 #define flowi_scope u.__fl_common.flowic_scope
148 #define flowi_proto u.__fl_common.flowic_proto
149 #define flowi_flags u.__fl_common.flowic_flags
150 #define flowi_secid u.__fl_common.flowic_secid
151 } __attribute__((__aligned__(BITS_PER_LONG/8)));
153 static inline struct flowi *flowi4_to_flowi(struct flowi4 *fl4)
155 return container_of(fl4, struct flowi, u.ip4);
158 static inline struct flowi *flowi6_to_flowi(struct flowi6 *fl6)
160 return container_of(fl6, struct flowi, u.ip6);
163 static inline struct flowi *flowidn_to_flowi(struct flowidn *fldn)
165 return container_of(fldn, struct flowi, u.dn);
168 typedef unsigned long flow_compare_t;
170 static inline size_t flow_key_size(u16 family)
174 BUILD_BUG_ON(sizeof(struct flowi4) % sizeof(flow_compare_t));
175 return sizeof(struct flowi4) / sizeof(flow_compare_t);
177 BUILD_BUG_ON(sizeof(struct flowi6) % sizeof(flow_compare_t));
178 return sizeof(struct flowi6) / sizeof(flow_compare_t);
180 BUILD_BUG_ON(sizeof(struct flowidn) % sizeof(flow_compare_t));
181 return sizeof(struct flowidn) / sizeof(flow_compare_t);
186 #define FLOW_DIR_IN 0
187 #define FLOW_DIR_OUT 1
188 #define FLOW_DIR_FWD 2
192 struct flow_cache_ops;
194 struct flow_cache_object {
195 const struct flow_cache_ops *ops;
198 struct flow_cache_ops {
199 struct flow_cache_object *(*get)(struct flow_cache_object *);
200 int (*check)(struct flow_cache_object *);
201 void (*delete)(struct flow_cache_object *);
204 typedef struct flow_cache_object *(*flow_resolve_t)(
205 struct net *net, const struct flowi *key, u16 family,
206 u8 dir, struct flow_cache_object *oldobj, void *ctx);
208 extern struct flow_cache_object *flow_cache_lookup(
209 struct net *net, const struct flowi *key, u16 family,
210 u8 dir, flow_resolve_t resolver, void *ctx);
212 extern void flow_cache_flush(void);
213 extern void flow_cache_flush_deferred(void);
214 extern atomic_t flow_cache_genid;