Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * | |
3 | * Generic internet FLOW. | |
4 | * | |
5 | */ | |
6 | ||
7 | #ifndef _NET_FLOW_H | |
8 | #define _NET_FLOW_H | |
9 | ||
aa1c366e | 10 | #include <linux/socket.h> |
1da177e4 | 11 | #include <linux/in6.h> |
60063497 | 12 | #include <linux/atomic.h> |
1da177e4 | 13 | |
806566cc DM |
14 | struct flowi_common { |
15 | int flowic_oif; | |
16 | int flowic_iif; | |
17 | __u32 flowic_mark; | |
18 | __u8 flowic_tos; | |
19 | __u8 flowic_scope; | |
20 | __u8 flowic_proto; | |
21 | __u8 flowic_flags; | |
fbef0a40 DM |
22 | #define FLOWI_FLAG_ANYSRC 0x01 |
23 | #define FLOWI_FLAG_PRECOW_METRICS 0x02 | |
24 | #define FLOWI_FLAG_CAN_SLEEP 0x04 | |
7586eceb | 25 | #define FLOWI_FLAG_RT_NOCACHE 0x08 |
806566cc DM |
26 | __u32 flowic_secid; |
27 | }; | |
28 | ||
08704bcb DM |
29 | union flowi_uli { |
30 | struct { | |
08704bcb | 31 | __be16 dport; |
9b12c75b | 32 | __be16 sport; |
08704bcb DM |
33 | } ports; |
34 | ||
35 | struct { | |
36 | __u8 type; | |
37 | __u8 code; | |
38 | } icmpt; | |
39 | ||
40 | struct { | |
08704bcb | 41 | __le16 dport; |
9b12c75b | 42 | __le16 sport; |
08704bcb DM |
43 | } dnports; |
44 | ||
45 | __be32 spi; | |
46 | __be32 gre_key; | |
47 | ||
48 | struct { | |
49 | __u8 type; | |
50 | } mht; | |
51 | }; | |
52 | ||
56bb8059 DM |
53 | struct flowi4 { |
54 | struct flowi_common __fl_common; | |
22bd5b9b DM |
55 | #define flowi4_oif __fl_common.flowic_oif |
56 | #define flowi4_iif __fl_common.flowic_iif | |
57 | #define flowi4_mark __fl_common.flowic_mark | |
58 | #define flowi4_tos __fl_common.flowic_tos | |
59 | #define flowi4_scope __fl_common.flowic_scope | |
60 | #define flowi4_proto __fl_common.flowic_proto | |
61 | #define flowi4_flags __fl_common.flowic_flags | |
62 | #define flowi4_secid __fl_common.flowic_secid | |
84f9307c ED |
63 | |
64 | /* (saddr,daddr) must be grouped, same order as in IP header */ | |
56bb8059 | 65 | __be32 saddr; |
84f9307c ED |
66 | __be32 daddr; |
67 | ||
56bb8059 | 68 | union flowi_uli uli; |
9cce96df DM |
69 | #define fl4_sport uli.ports.sport |
70 | #define fl4_dport uli.ports.dport | |
71 | #define fl4_icmp_type uli.icmpt.type | |
72 | #define fl4_icmp_code uli.icmpt.code | |
73 | #define fl4_ipsec_spi uli.spi | |
74 | #define fl4_mh_type uli.mht.type | |
75 | #define fl4_gre_key uli.gre_key | |
728871bc | 76 | } __attribute__((__aligned__(BITS_PER_LONG/8))); |
56bb8059 | 77 | |
83229aa5 DM |
78 | static inline void flowi4_init_output(struct flowi4 *fl4, int oif, |
79 | __u32 mark, __u8 tos, __u8 scope, | |
80 | __u8 proto, __u8 flags, | |
81 | __be32 daddr, __be32 saddr, | |
747465ef | 82 | __be16 dport, __be16 sport) |
83229aa5 DM |
83 | { |
84 | fl4->flowi4_oif = oif; | |
85 | fl4->flowi4_iif = 0; | |
86 | fl4->flowi4_mark = mark; | |
87 | fl4->flowi4_tos = tos; | |
88 | fl4->flowi4_scope = scope; | |
89 | fl4->flowi4_proto = proto; | |
90 | fl4->flowi4_flags = flags; | |
91 | fl4->flowi4_secid = 0; | |
92 | fl4->daddr = daddr; | |
93 | fl4->saddr = saddr; | |
83229aa5 | 94 | fl4->fl4_dport = dport; |
9b12c75b | 95 | fl4->fl4_sport = sport; |
83229aa5 | 96 | } |
e6b45241 JA |
97 | |
98 | /* Reset some input parameters after previous lookup */ | |
99 | static inline void flowi4_update_output(struct flowi4 *fl4, int oif, __u8 tos, | |
100 | __be32 daddr, __be32 saddr) | |
101 | { | |
102 | fl4->flowi4_oif = oif; | |
103 | fl4->flowi4_tos = tos; | |
104 | fl4->daddr = daddr; | |
105 | fl4->saddr = saddr; | |
106 | } | |
83229aa5 DM |
107 | |
108 | ||
56bb8059 | 109 | struct flowi6 { |
806566cc | 110 | struct flowi_common __fl_common; |
2032656e DM |
111 | #define flowi6_oif __fl_common.flowic_oif |
112 | #define flowi6_iif __fl_common.flowic_iif | |
113 | #define flowi6_mark __fl_common.flowic_mark | |
114 | #define flowi6_tos __fl_common.flowic_tos | |
115 | #define flowi6_scope __fl_common.flowic_scope | |
116 | #define flowi6_proto __fl_common.flowic_proto | |
117 | #define flowi6_flags __fl_common.flowic_flags | |
118 | #define flowi6_secid __fl_common.flowic_secid | |
56bb8059 DM |
119 | struct in6_addr daddr; |
120 | struct in6_addr saddr; | |
121 | __be32 flowlabel; | |
122 | union flowi_uli uli; | |
1958b856 DM |
123 | #define fl6_sport uli.ports.sport |
124 | #define fl6_dport uli.ports.dport | |
125 | #define fl6_icmp_type uli.icmpt.type | |
126 | #define fl6_icmp_code uli.icmpt.code | |
127 | #define fl6_ipsec_spi uli.spi | |
128 | #define fl6_mh_type uli.mht.type | |
129 | #define fl6_gre_key uli.gre_key | |
728871bc | 130 | } __attribute__((__aligned__(BITS_PER_LONG/8))); |
1da177e4 | 131 | |
56bb8059 DM |
132 | struct flowidn { |
133 | struct flowi_common __fl_common; | |
bef55aeb DM |
134 | #define flowidn_oif __fl_common.flowic_oif |
135 | #define flowidn_iif __fl_common.flowic_iif | |
136 | #define flowidn_mark __fl_common.flowic_mark | |
137 | #define flowidn_scope __fl_common.flowic_scope | |
138 | #define flowidn_proto __fl_common.flowic_proto | |
139 | #define flowidn_flags __fl_common.flowic_flags | |
56bb8059 DM |
140 | __le16 daddr; |
141 | __le16 saddr; | |
142 | union flowi_uli uli; | |
bef55aeb DM |
143 | #define fld_sport uli.ports.sport |
144 | #define fld_dport uli.ports.dport | |
728871bc | 145 | } __attribute__((__aligned__(BITS_PER_LONG/8))); |
56bb8059 DM |
146 | |
147 | struct flowi { | |
1da177e4 | 148 | union { |
56bb8059 DM |
149 | struct flowi_common __fl_common; |
150 | struct flowi4 ip4; | |
151 | struct flowi6 ip6; | |
152 | struct flowidn dn; | |
153 | } u; | |
154 | #define flowi_oif u.__fl_common.flowic_oif | |
155 | #define flowi_iif u.__fl_common.flowic_iif | |
156 | #define flowi_mark u.__fl_common.flowic_mark | |
157 | #define flowi_tos u.__fl_common.flowic_tos | |
158 | #define flowi_scope u.__fl_common.flowic_scope | |
159 | #define flowi_proto u.__fl_common.flowic_proto | |
160 | #define flowi_flags u.__fl_common.flowic_flags | |
161 | #define flowi_secid u.__fl_common.flowic_secid | |
1da177e4 LT |
162 | } __attribute__((__aligned__(BITS_PER_LONG/8))); |
163 | ||
59b1a94c DM |
164 | static inline struct flowi *flowi4_to_flowi(struct flowi4 *fl4) |
165 | { | |
166 | return container_of(fl4, struct flowi, u.ip4); | |
167 | } | |
168 | ||
169 | static inline struct flowi *flowi6_to_flowi(struct flowi6 *fl6) | |
170 | { | |
171 | return container_of(fl6, struct flowi, u.ip6); | |
172 | } | |
173 | ||
174 | static inline struct flowi *flowidn_to_flowi(struct flowidn *fldn) | |
175 | { | |
176 | return container_of(fldn, struct flowi, u.dn); | |
177 | } | |
178 | ||
aa1c366e | 179 | typedef unsigned long flow_compare_t; |
180 | ||
181 | static inline size_t flow_key_size(u16 family) | |
182 | { | |
183 | switch (family) { | |
184 | case AF_INET: | |
185 | BUILD_BUG_ON(sizeof(struct flowi4) % sizeof(flow_compare_t)); | |
186 | return sizeof(struct flowi4) / sizeof(flow_compare_t); | |
187 | case AF_INET6: | |
188 | BUILD_BUG_ON(sizeof(struct flowi6) % sizeof(flow_compare_t)); | |
189 | return sizeof(struct flowi6) / sizeof(flow_compare_t); | |
190 | case AF_DECnet: | |
191 | BUILD_BUG_ON(sizeof(struct flowidn) % sizeof(flow_compare_t)); | |
192 | return sizeof(struct flowidn) / sizeof(flow_compare_t); | |
193 | } | |
194 | return 0; | |
195 | } | |
196 | ||
1da177e4 LT |
197 | #define FLOW_DIR_IN 0 |
198 | #define FLOW_DIR_OUT 1 | |
199 | #define FLOW_DIR_FWD 2 | |
200 | ||
52479b62 | 201 | struct net; |
df71837d | 202 | struct sock; |
fe1a5f03 TT |
203 | struct flow_cache_ops; |
204 | ||
205 | struct flow_cache_object { | |
206 | const struct flow_cache_ops *ops; | |
207 | }; | |
208 | ||
209 | struct flow_cache_ops { | |
210 | struct flow_cache_object *(*get)(struct flow_cache_object *); | |
211 | int (*check)(struct flow_cache_object *); | |
212 | void (*delete)(struct flow_cache_object *); | |
213 | }; | |
214 | ||
215 | typedef struct flow_cache_object *(*flow_resolve_t)( | |
dee9f4bc | 216 | struct net *net, const struct flowi *key, u16 family, |
fe1a5f03 TT |
217 | u8 dir, struct flow_cache_object *oldobj, void *ctx); |
218 | ||
219 | extern struct flow_cache_object *flow_cache_lookup( | |
dee9f4bc | 220 | struct net *net, const struct flowi *key, u16 family, |
fe1a5f03 | 221 | u8 dir, flow_resolve_t resolver, void *ctx); |
1da177e4 | 222 | |
1da177e4 | 223 | extern void flow_cache_flush(void); |
c0ed1c14 | 224 | extern void flow_cache_flush_deferred(void); |
1da177e4 LT |
225 | extern atomic_t flow_cache_genid; |
226 | ||
227 | #endif |