3 * Generic internet FLOW.
10 #include <linux/socket.h>
11 #include <linux/in6.h>
12 #include <linux/atomic.h>
13 #include <linux/uidgid.h>
23 #define FLOWI_FLAG_ANYSRC 0x01
24 #define FLOWI_FLAG_CAN_SLEEP 0x02
25 #define FLOWI_FLAG_KNOWN_NH 0x04
55 struct flowi_common __fl_common;
56 #define flowi4_oif __fl_common.flowic_oif
57 #define flowi4_iif __fl_common.flowic_iif
58 #define flowi4_mark __fl_common.flowic_mark
59 #define flowi4_tos __fl_common.flowic_tos
60 #define flowi4_scope __fl_common.flowic_scope
61 #define flowi4_proto __fl_common.flowic_proto
62 #define flowi4_flags __fl_common.flowic_flags
63 #define flowi4_secid __fl_common.flowic_secid
64 #define flowi4_uid __fl_common.flowic_uid
66 /* (saddr,daddr) must be grouped, same order as in IP header */
71 #define fl4_sport uli.ports.sport
72 #define fl4_dport uli.ports.dport
73 #define fl4_icmp_type uli.icmpt.type
74 #define fl4_icmp_code uli.icmpt.code
75 #define fl4_ipsec_spi uli.spi
76 #define fl4_mh_type uli.mht.type
77 #define fl4_gre_key uli.gre_key
78 } __attribute__((__aligned__(BITS_PER_LONG/8)));
80 static inline void flowi4_init_output(struct flowi4 *fl4, int oif,
81 __u32 mark, __u8 tos, __u8 scope,
82 __u8 proto, __u8 flags,
83 __be32 daddr, __be32 saddr,
84 __be16 dport, __be16 sport,
87 fl4->flowi4_oif = oif;
89 fl4->flowi4_mark = mark;
90 fl4->flowi4_tos = tos;
91 fl4->flowi4_scope = scope;
92 fl4->flowi4_proto = proto;
93 fl4->flowi4_flags = flags;
94 fl4->flowi4_secid = 0;
95 fl4->flowi4_uid = uid;
98 fl4->fl4_dport = dport;
99 fl4->fl4_sport = sport;
102 /* Reset some input parameters after previous lookup */
103 static inline void flowi4_update_output(struct flowi4 *fl4, int oif, __u8 tos,
104 __be32 daddr, __be32 saddr)
106 fl4->flowi4_oif = oif;
107 fl4->flowi4_tos = tos;
114 struct flowi_common __fl_common;
115 #define flowi6_oif __fl_common.flowic_oif
116 #define flowi6_iif __fl_common.flowic_iif
117 #define flowi6_mark __fl_common.flowic_mark
118 #define flowi6_tos __fl_common.flowic_tos
119 #define flowi6_scope __fl_common.flowic_scope
120 #define flowi6_proto __fl_common.flowic_proto
121 #define flowi6_flags __fl_common.flowic_flags
122 #define flowi6_secid __fl_common.flowic_secid
123 #define flowi6_uid __fl_common.flowic_uid
124 struct in6_addr daddr;
125 struct in6_addr saddr;
128 #define fl6_sport uli.ports.sport
129 #define fl6_dport uli.ports.dport
130 #define fl6_icmp_type uli.icmpt.type
131 #define fl6_icmp_code uli.icmpt.code
132 #define fl6_ipsec_spi uli.spi
133 #define fl6_mh_type uli.mht.type
134 #define fl6_gre_key uli.gre_key
135 } __attribute__((__aligned__(BITS_PER_LONG/8)));
138 struct flowi_common __fl_common;
139 #define flowidn_oif __fl_common.flowic_oif
140 #define flowidn_iif __fl_common.flowic_iif
141 #define flowidn_mark __fl_common.flowic_mark
142 #define flowidn_scope __fl_common.flowic_scope
143 #define flowidn_proto __fl_common.flowic_proto
144 #define flowidn_flags __fl_common.flowic_flags
148 #define fld_sport uli.ports.sport
149 #define fld_dport uli.ports.dport
150 } __attribute__((__aligned__(BITS_PER_LONG/8)));
154 struct flowi_common __fl_common;
159 #define flowi_oif u.__fl_common.flowic_oif
160 #define flowi_iif u.__fl_common.flowic_iif
161 #define flowi_mark u.__fl_common.flowic_mark
162 #define flowi_tos u.__fl_common.flowic_tos
163 #define flowi_scope u.__fl_common.flowic_scope
164 #define flowi_proto u.__fl_common.flowic_proto
165 #define flowi_flags u.__fl_common.flowic_flags
166 #define flowi_secid u.__fl_common.flowic_secid
167 #define flowi_uid u.__fl_common.flowic_uid
168 } __attribute__((__aligned__(BITS_PER_LONG/8)));
170 static inline struct flowi *flowi4_to_flowi(struct flowi4 *fl4)
172 return container_of(fl4, struct flowi, u.ip4);
175 static inline struct flowi *flowi6_to_flowi(struct flowi6 *fl6)
177 return container_of(fl6, struct flowi, u.ip6);
180 static inline struct flowi *flowidn_to_flowi(struct flowidn *fldn)
182 return container_of(fldn, struct flowi, u.dn);
185 typedef unsigned long flow_compare_t;
187 static inline size_t flow_key_size(u16 family)
191 BUILD_BUG_ON(sizeof(struct flowi4) % sizeof(flow_compare_t));
192 return sizeof(struct flowi4) / sizeof(flow_compare_t);
194 BUILD_BUG_ON(sizeof(struct flowi6) % sizeof(flow_compare_t));
195 return sizeof(struct flowi6) / sizeof(flow_compare_t);
197 BUILD_BUG_ON(sizeof(struct flowidn) % sizeof(flow_compare_t));
198 return sizeof(struct flowidn) / sizeof(flow_compare_t);
203 #define FLOW_DIR_IN 0
204 #define FLOW_DIR_OUT 1
205 #define FLOW_DIR_FWD 2
209 struct flow_cache_ops;
211 struct flow_cache_object {
212 const struct flow_cache_ops *ops;
215 struct flow_cache_ops {
216 struct flow_cache_object *(*get)(struct flow_cache_object *);
217 int (*check)(struct flow_cache_object *);
218 void (*delete)(struct flow_cache_object *);
221 typedef struct flow_cache_object *(*flow_resolve_t)(
222 struct net *net, const struct flowi *key, u16 family,
223 u8 dir, struct flow_cache_object *oldobj, void *ctx);
225 extern struct flow_cache_object *flow_cache_lookup(
226 struct net *net, const struct flowi *key, u16 family,
227 u8 dir, flow_resolve_t resolver, void *ctx);
229 extern void flow_cache_flush(void);
230 extern void flow_cache_flush_deferred(void);
231 extern atomic_t flow_cache_genid;