3 * Generic internet FLOW.
10 #include <linux/socket.h>
11 #include <linux/in6.h>
12 #include <linux/atomic.h>
13 #include <net/flow_dissector.h>
16 * ifindex generation is per-net namespace, and loopback is
17 * always the 1st device in ns (see net_dev_init), thus any
18 * loopback device should get ifindex 1
21 #define LOOPBACK_IFINDEX 1
35 #define FLOWI_FLAG_ANYSRC 0x01
36 #define FLOWI_FLAG_KNOWN_NH 0x02
37 #define FLOWI_FLAG_VRFSRC 0x04
39 struct flowi_tunnel flowic_tun_key;
67 struct flowi_common __fl_common;
68 #define flowi4_oif __fl_common.flowic_oif
69 #define flowi4_iif __fl_common.flowic_iif
70 #define flowi4_mark __fl_common.flowic_mark
71 #define flowi4_tos __fl_common.flowic_tos
72 #define flowi4_scope __fl_common.flowic_scope
73 #define flowi4_proto __fl_common.flowic_proto
74 #define flowi4_flags __fl_common.flowic_flags
75 #define flowi4_secid __fl_common.flowic_secid
76 #define flowi4_tun_key __fl_common.flowic_tun_key
78 /* (saddr,daddr) must be grouped, same order as in IP header */
83 #define fl4_sport uli.ports.sport
84 #define fl4_dport uli.ports.dport
85 #define fl4_icmp_type uli.icmpt.type
86 #define fl4_icmp_code uli.icmpt.code
87 #define fl4_ipsec_spi uli.spi
88 #define fl4_mh_type uli.mht.type
89 #define fl4_gre_key uli.gre_key
90 } __attribute__((__aligned__(BITS_PER_LONG/8)));
92 static inline void flowi4_init_output(struct flowi4 *fl4, int oif,
93 __u32 mark, __u8 tos, __u8 scope,
94 __u8 proto, __u8 flags,
95 __be32 daddr, __be32 saddr,
96 __be16 dport, __be16 sport)
98 fl4->flowi4_oif = oif;
99 fl4->flowi4_iif = LOOPBACK_IFINDEX;
100 fl4->flowi4_mark = mark;
101 fl4->flowi4_tos = tos;
102 fl4->flowi4_scope = scope;
103 fl4->flowi4_proto = proto;
104 fl4->flowi4_flags = flags;
105 fl4->flowi4_secid = 0;
106 fl4->flowi4_tun_key.tun_id = 0;
109 fl4->fl4_dport = dport;
110 fl4->fl4_sport = sport;
113 /* Reset some input parameters after previous lookup */
114 static inline void flowi4_update_output(struct flowi4 *fl4, int oif, __u8 tos,
115 __be32 daddr, __be32 saddr)
117 fl4->flowi4_oif = oif;
118 fl4->flowi4_tos = tos;
125 struct flowi_common __fl_common;
126 #define flowi6_oif __fl_common.flowic_oif
127 #define flowi6_iif __fl_common.flowic_iif
128 #define flowi6_mark __fl_common.flowic_mark
129 #define flowi6_tos __fl_common.flowic_tos
130 #define flowi6_scope __fl_common.flowic_scope
131 #define flowi6_proto __fl_common.flowic_proto
132 #define flowi6_flags __fl_common.flowic_flags
133 #define flowi6_secid __fl_common.flowic_secid
134 #define flowi6_tun_key __fl_common.flowic_tun_key
135 struct in6_addr daddr;
136 struct in6_addr saddr;
139 #define fl6_sport uli.ports.sport
140 #define fl6_dport uli.ports.dport
141 #define fl6_icmp_type uli.icmpt.type
142 #define fl6_icmp_code uli.icmpt.code
143 #define fl6_ipsec_spi uli.spi
144 #define fl6_mh_type uli.mht.type
145 #define fl6_gre_key uli.gre_key
146 } __attribute__((__aligned__(BITS_PER_LONG/8)));
149 struct flowi_common __fl_common;
150 #define flowidn_oif __fl_common.flowic_oif
151 #define flowidn_iif __fl_common.flowic_iif
152 #define flowidn_mark __fl_common.flowic_mark
153 #define flowidn_scope __fl_common.flowic_scope
154 #define flowidn_proto __fl_common.flowic_proto
155 #define flowidn_flags __fl_common.flowic_flags
159 #define fld_sport uli.ports.sport
160 #define fld_dport uli.ports.dport
161 } __attribute__((__aligned__(BITS_PER_LONG/8)));
165 struct flowi_common __fl_common;
170 #define flowi_oif u.__fl_common.flowic_oif
171 #define flowi_iif u.__fl_common.flowic_iif
172 #define flowi_mark u.__fl_common.flowic_mark
173 #define flowi_tos u.__fl_common.flowic_tos
174 #define flowi_scope u.__fl_common.flowic_scope
175 #define flowi_proto u.__fl_common.flowic_proto
176 #define flowi_flags u.__fl_common.flowic_flags
177 #define flowi_secid u.__fl_common.flowic_secid
178 #define flowi_tun_key u.__fl_common.flowic_tun_key
179 } __attribute__((__aligned__(BITS_PER_LONG/8)));
181 static inline struct flowi *flowi4_to_flowi(struct flowi4 *fl4)
183 return container_of(fl4, struct flowi, u.ip4);
186 static inline struct flowi *flowi6_to_flowi(struct flowi6 *fl6)
188 return container_of(fl6, struct flowi, u.ip6);
191 static inline struct flowi *flowidn_to_flowi(struct flowidn *fldn)
193 return container_of(fldn, struct flowi, u.dn);
196 typedef unsigned long flow_compare_t;
198 static inline size_t flow_key_size(u16 family)
202 BUILD_BUG_ON(sizeof(struct flowi4) % sizeof(flow_compare_t));
203 return sizeof(struct flowi4) / sizeof(flow_compare_t);
205 BUILD_BUG_ON(sizeof(struct flowi6) % sizeof(flow_compare_t));
206 return sizeof(struct flowi6) / sizeof(flow_compare_t);
208 BUILD_BUG_ON(sizeof(struct flowidn) % sizeof(flow_compare_t));
209 return sizeof(struct flowidn) / sizeof(flow_compare_t);
214 #define FLOW_DIR_IN 0
215 #define FLOW_DIR_OUT 1
216 #define FLOW_DIR_FWD 2
220 struct flow_cache_ops;
222 struct flow_cache_object {
223 const struct flow_cache_ops *ops;
226 struct flow_cache_ops {
227 struct flow_cache_object *(*get)(struct flow_cache_object *);
228 int (*check)(struct flow_cache_object *);
229 void (*delete)(struct flow_cache_object *);
232 typedef struct flow_cache_object *(*flow_resolve_t)(
233 struct net *net, const struct flowi *key, u16 family,
234 u8 dir, struct flow_cache_object *oldobj, void *ctx);
236 struct flow_cache_object *flow_cache_lookup(struct net *net,
237 const struct flowi *key, u16 family,
238 u8 dir, flow_resolve_t resolver,
240 int flow_cache_init(struct net *net);
241 void flow_cache_fini(struct net *net);
243 void flow_cache_flush(struct net *net);
244 void flow_cache_flush_deferred(struct net *net);
245 extern atomic_t flow_cache_genid;
247 __u32 __get_hash_from_flowi6(const struct flowi6 *fl6, struct flow_keys *keys);
249 static inline __u32 get_hash_from_flowi6(const struct flowi6 *fl6)
251 struct flow_keys keys;
253 return __get_hash_from_flowi6(fl6, &keys);
256 __u32 __get_hash_from_flowi4(const struct flowi4 *fl4, struct flow_keys *keys);
258 static inline __u32 get_hash_from_flowi4(const struct flowi4 *fl4)
260 struct flow_keys keys;
262 return __get_hash_from_flowi4(fl4, &keys);