3 * Generic internet FLOW.
10 #include <linux/socket.h>
11 #include <linux/in6.h>
12 #include <asm/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;
94 /* Reset some input parameters after previous lookup */
95 static inline void flowi4_update_output(struct flowi4 *fl4, int oif, __u8 tos,
96 __be32 daddr, __be32 saddr)
98 fl4->flowi4_oif = oif;
99 fl4->flowi4_tos = tos;
106 struct flowi_common __fl_common;
107 #define flowi6_oif __fl_common.flowic_oif
108 #define flowi6_iif __fl_common.flowic_iif
109 #define flowi6_mark __fl_common.flowic_mark
110 #define flowi6_tos __fl_common.flowic_tos
111 #define flowi6_scope __fl_common.flowic_scope
112 #define flowi6_proto __fl_common.flowic_proto
113 #define flowi6_flags __fl_common.flowic_flags
114 #define flowi6_secid __fl_common.flowic_secid
115 struct in6_addr daddr;
116 struct in6_addr saddr;
119 #define fl6_sport uli.ports.sport
120 #define fl6_dport uli.ports.dport
121 #define fl6_icmp_type uli.icmpt.type
122 #define fl6_icmp_code uli.icmpt.code
123 #define fl6_ipsec_spi uli.spi
124 #define fl6_mh_type uli.mht.type
125 #define fl6_gre_key uli.gre_key
126 } __attribute__((__aligned__(BITS_PER_LONG/8)));
129 struct flowi_common __fl_common;
130 #define flowidn_oif __fl_common.flowic_oif
131 #define flowidn_iif __fl_common.flowic_iif
132 #define flowidn_mark __fl_common.flowic_mark
133 #define flowidn_scope __fl_common.flowic_scope
134 #define flowidn_proto __fl_common.flowic_proto
135 #define flowidn_flags __fl_common.flowic_flags
139 #define fld_sport uli.ports.sport
140 #define fld_dport uli.ports.dport
141 } __attribute__((__aligned__(BITS_PER_LONG/8)));
145 struct flowi_common __fl_common;
150 #define flowi_oif u.__fl_common.flowic_oif
151 #define flowi_iif u.__fl_common.flowic_iif
152 #define flowi_mark u.__fl_common.flowic_mark
153 #define flowi_tos u.__fl_common.flowic_tos
154 #define flowi_scope u.__fl_common.flowic_scope
155 #define flowi_proto u.__fl_common.flowic_proto
156 #define flowi_flags u.__fl_common.flowic_flags
157 #define flowi_secid u.__fl_common.flowic_secid
158 } __attribute__((__aligned__(BITS_PER_LONG/8)));
160 static inline struct flowi *flowi4_to_flowi(struct flowi4 *fl4)
162 return container_of(fl4, struct flowi, u.ip4);
165 static inline struct flowi *flowi6_to_flowi(struct flowi6 *fl6)
167 return container_of(fl6, struct flowi, u.ip6);
170 static inline struct flowi *flowidn_to_flowi(struct flowidn *fldn)
172 return container_of(fldn, struct flowi, u.dn);
175 typedef unsigned long flow_compare_t;
177 static inline size_t flow_key_size(u16 family)
181 BUILD_BUG_ON(sizeof(struct flowi4) % sizeof(flow_compare_t));
182 return sizeof(struct flowi4) / sizeof(flow_compare_t);
184 BUILD_BUG_ON(sizeof(struct flowi6) % sizeof(flow_compare_t));
185 return sizeof(struct flowi6) / sizeof(flow_compare_t);
187 BUILD_BUG_ON(sizeof(struct flowidn) % sizeof(flow_compare_t));
188 return sizeof(struct flowidn) / sizeof(flow_compare_t);
193 #define FLOW_DIR_IN 0
194 #define FLOW_DIR_OUT 1
195 #define FLOW_DIR_FWD 2
199 struct flow_cache_ops;
201 struct flow_cache_object {
202 const struct flow_cache_ops *ops;
205 struct flow_cache_ops {
206 struct flow_cache_object *(*get)(struct flow_cache_object *);
207 int (*check)(struct flow_cache_object *);
208 void (*delete)(struct flow_cache_object *);
211 typedef struct flow_cache_object *(*flow_resolve_t)(
212 struct net *net, const struct flowi *key, u16 family,
213 u8 dir, struct flow_cache_object *oldobj, void *ctx);
215 extern struct flow_cache_object *flow_cache_lookup(
216 struct net *net, const struct flowi *key, u16 family,
217 u8 dir, flow_resolve_t resolver, void *ctx);
219 extern void flow_cache_flush(void);
220 extern atomic_t flow_cache_genid;