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
65 #define fl4_sport uli.ports.sport
66 #define fl4_dport uli.ports.dport
67 #define fl4_icmp_type uli.icmpt.type
68 #define fl4_icmp_code uli.icmpt.code
69 #define fl4_ipsec_spi uli.spi
70 #define fl4_mh_type uli.mht.type
71 #define fl4_gre_key uli.gre_key
72 } __attribute__((__aligned__(BITS_PER_LONG/8)));
74 static inline void flowi4_init_output(struct flowi4 *fl4, int oif,
75 __u32 mark, __u8 tos, __u8 scope,
76 __u8 proto, __u8 flags,
77 __be32 daddr, __be32 saddr,
78 __be16 dport, __be32 sport)
80 fl4->flowi4_oif = oif;
82 fl4->flowi4_mark = mark;
83 fl4->flowi4_tos = tos;
84 fl4->flowi4_scope = scope;
85 fl4->flowi4_proto = proto;
86 fl4->flowi4_flags = flags;
87 fl4->flowi4_secid = 0;
90 fl4->fl4_dport = dport;
91 fl4->fl4_sport = sport;
96 struct flowi_common __fl_common;
97 #define flowi6_oif __fl_common.flowic_oif
98 #define flowi6_iif __fl_common.flowic_iif
99 #define flowi6_mark __fl_common.flowic_mark
100 #define flowi6_tos __fl_common.flowic_tos
101 #define flowi6_scope __fl_common.flowic_scope
102 #define flowi6_proto __fl_common.flowic_proto
103 #define flowi6_flags __fl_common.flowic_flags
104 #define flowi6_secid __fl_common.flowic_secid
105 struct in6_addr daddr;
106 struct in6_addr saddr;
109 #define fl6_sport uli.ports.sport
110 #define fl6_dport uli.ports.dport
111 #define fl6_icmp_type uli.icmpt.type
112 #define fl6_icmp_code uli.icmpt.code
113 #define fl6_ipsec_spi uli.spi
114 #define fl6_mh_type uli.mht.type
115 #define fl6_gre_key uli.gre_key
116 } __attribute__((__aligned__(BITS_PER_LONG/8)));
119 struct flowi_common __fl_common;
120 #define flowidn_oif __fl_common.flowic_oif
121 #define flowidn_iif __fl_common.flowic_iif
122 #define flowidn_mark __fl_common.flowic_mark
123 #define flowidn_scope __fl_common.flowic_scope
124 #define flowidn_proto __fl_common.flowic_proto
125 #define flowidn_flags __fl_common.flowic_flags
129 #define fld_sport uli.ports.sport
130 #define fld_dport uli.ports.dport
131 } __attribute__((__aligned__(BITS_PER_LONG/8)));
135 struct flowi_common __fl_common;
140 #define flowi_oif u.__fl_common.flowic_oif
141 #define flowi_iif u.__fl_common.flowic_iif
142 #define flowi_mark u.__fl_common.flowic_mark
143 #define flowi_tos u.__fl_common.flowic_tos
144 #define flowi_scope u.__fl_common.flowic_scope
145 #define flowi_proto u.__fl_common.flowic_proto
146 #define flowi_flags u.__fl_common.flowic_flags
147 #define flowi_secid u.__fl_common.flowic_secid
148 } __attribute__((__aligned__(BITS_PER_LONG/8)));
150 static inline struct flowi *flowi4_to_flowi(struct flowi4 *fl4)
152 return container_of(fl4, struct flowi, u.ip4);
155 static inline struct flowi *flowi6_to_flowi(struct flowi6 *fl6)
157 return container_of(fl6, struct flowi, u.ip6);
160 static inline struct flowi *flowidn_to_flowi(struct flowidn *fldn)
162 return container_of(fldn, struct flowi, u.dn);
165 typedef unsigned long flow_compare_t;
167 static inline size_t flow_key_size(u16 family)
171 BUILD_BUG_ON(sizeof(struct flowi4) % sizeof(flow_compare_t));
172 return sizeof(struct flowi4) / sizeof(flow_compare_t);
174 BUILD_BUG_ON(sizeof(struct flowi6) % sizeof(flow_compare_t));
175 return sizeof(struct flowi6) / sizeof(flow_compare_t);
177 BUILD_BUG_ON(sizeof(struct flowidn) % sizeof(flow_compare_t));
178 return sizeof(struct flowidn) / sizeof(flow_compare_t);
183 #define FLOW_DIR_IN 0
184 #define FLOW_DIR_OUT 1
185 #define FLOW_DIR_FWD 2
189 struct flow_cache_ops;
191 struct flow_cache_object {
192 const struct flow_cache_ops *ops;
195 struct flow_cache_ops {
196 struct flow_cache_object *(*get)(struct flow_cache_object *);
197 int (*check)(struct flow_cache_object *);
198 void (*delete)(struct flow_cache_object *);
201 typedef struct flow_cache_object *(*flow_resolve_t)(
202 struct net *net, const struct flowi *key, u16 family,
203 u8 dir, struct flow_cache_object *oldobj, void *ctx);
205 extern struct flow_cache_object *flow_cache_lookup(
206 struct net *net, const struct flowi *key, u16 family,
207 u8 dir, flow_resolve_t resolver, void *ctx);
209 extern void flow_cache_flush(void);
210 extern void flow_cache_flush_deferred(void);
211 extern atomic_t flow_cache_genid;