3 * Generic internet FLOW.
10 #include <linux/socket.h>
11 #include <linux/in6.h>
12 #include <linux/atomic.h>
15 * ifindex generation is per-net namespace, and loopback is
16 * always the 1st device in ns (see net_dev_init), thus any
17 * loopback device should get ifindex 1
20 #define LOOPBACK_IFINDEX 1
34 #define FLOWI_FLAG_ANYSRC 0x01
35 #define FLOWI_FLAG_KNOWN_NH 0x02
36 #define FLOWI_FLAG_VRFSRC 0x04
38 struct flowi_tunnel flowic_tun_key;
66 struct flowi_common __fl_common;
67 #define flowi4_oif __fl_common.flowic_oif
68 #define flowi4_iif __fl_common.flowic_iif
69 #define flowi4_mark __fl_common.flowic_mark
70 #define flowi4_tos __fl_common.flowic_tos
71 #define flowi4_scope __fl_common.flowic_scope
72 #define flowi4_proto __fl_common.flowic_proto
73 #define flowi4_flags __fl_common.flowic_flags
74 #define flowi4_secid __fl_common.flowic_secid
75 #define flowi4_tun_key __fl_common.flowic_tun_key
77 /* (saddr,daddr) must be grouped, same order as in IP header */
82 #define fl4_sport uli.ports.sport
83 #define fl4_dport uli.ports.dport
84 #define fl4_icmp_type uli.icmpt.type
85 #define fl4_icmp_code uli.icmpt.code
86 #define fl4_ipsec_spi uli.spi
87 #define fl4_mh_type uli.mht.type
88 #define fl4_gre_key uli.gre_key
89 } __attribute__((__aligned__(BITS_PER_LONG/8)));
91 static inline void flowi4_init_output(struct flowi4 *fl4, int oif,
92 __u32 mark, __u8 tos, __u8 scope,
93 __u8 proto, __u8 flags,
94 __be32 daddr, __be32 saddr,
95 __be16 dport, __be16 sport)
97 fl4->flowi4_oif = oif;
98 fl4->flowi4_iif = LOOPBACK_IFINDEX;
99 fl4->flowi4_mark = mark;
100 fl4->flowi4_tos = tos;
101 fl4->flowi4_scope = scope;
102 fl4->flowi4_proto = proto;
103 fl4->flowi4_flags = flags;
104 fl4->flowi4_secid = 0;
105 fl4->flowi4_tun_key.tun_id = 0;
108 fl4->fl4_dport = dport;
109 fl4->fl4_sport = sport;
112 /* Reset some input parameters after previous lookup */
113 static inline void flowi4_update_output(struct flowi4 *fl4, int oif, __u8 tos,
114 __be32 daddr, __be32 saddr)
116 fl4->flowi4_oif = oif;
117 fl4->flowi4_tos = tos;
124 struct flowi_common __fl_common;
125 #define flowi6_oif __fl_common.flowic_oif
126 #define flowi6_iif __fl_common.flowic_iif
127 #define flowi6_mark __fl_common.flowic_mark
128 #define flowi6_tos __fl_common.flowic_tos
129 #define flowi6_scope __fl_common.flowic_scope
130 #define flowi6_proto __fl_common.flowic_proto
131 #define flowi6_flags __fl_common.flowic_flags
132 #define flowi6_secid __fl_common.flowic_secid
133 #define flowi6_tun_key __fl_common.flowic_tun_key
134 struct in6_addr daddr;
135 struct in6_addr saddr;
138 #define fl6_sport uli.ports.sport
139 #define fl6_dport uli.ports.dport
140 #define fl6_icmp_type uli.icmpt.type
141 #define fl6_icmp_code uli.icmpt.code
142 #define fl6_ipsec_spi uli.spi
143 #define fl6_mh_type uli.mht.type
144 #define fl6_gre_key uli.gre_key
145 } __attribute__((__aligned__(BITS_PER_LONG/8)));
148 struct flowi_common __fl_common;
149 #define flowidn_oif __fl_common.flowic_oif
150 #define flowidn_iif __fl_common.flowic_iif
151 #define flowidn_mark __fl_common.flowic_mark
152 #define flowidn_scope __fl_common.flowic_scope
153 #define flowidn_proto __fl_common.flowic_proto
154 #define flowidn_flags __fl_common.flowic_flags
158 #define fld_sport uli.ports.sport
159 #define fld_dport uli.ports.dport
160 } __attribute__((__aligned__(BITS_PER_LONG/8)));
164 struct flowi_common __fl_common;
169 #define flowi_oif u.__fl_common.flowic_oif
170 #define flowi_iif u.__fl_common.flowic_iif
171 #define flowi_mark u.__fl_common.flowic_mark
172 #define flowi_tos u.__fl_common.flowic_tos
173 #define flowi_scope u.__fl_common.flowic_scope
174 #define flowi_proto u.__fl_common.flowic_proto
175 #define flowi_flags u.__fl_common.flowic_flags
176 #define flowi_secid u.__fl_common.flowic_secid
177 #define flowi_tun_key u.__fl_common.flowic_tun_key
178 } __attribute__((__aligned__(BITS_PER_LONG/8)));
180 static inline struct flowi *flowi4_to_flowi(struct flowi4 *fl4)
182 return container_of(fl4, struct flowi, u.ip4);
185 static inline struct flowi *flowi6_to_flowi(struct flowi6 *fl6)
187 return container_of(fl6, struct flowi, u.ip6);
190 static inline struct flowi *flowidn_to_flowi(struct flowidn *fldn)
192 return container_of(fldn, struct flowi, u.dn);
195 typedef unsigned long flow_compare_t;
197 static inline size_t flow_key_size(u16 family)
201 BUILD_BUG_ON(sizeof(struct flowi4) % sizeof(flow_compare_t));
202 return sizeof(struct flowi4) / sizeof(flow_compare_t);
204 BUILD_BUG_ON(sizeof(struct flowi6) % sizeof(flow_compare_t));
205 return sizeof(struct flowi6) / sizeof(flow_compare_t);
207 BUILD_BUG_ON(sizeof(struct flowidn) % sizeof(flow_compare_t));
208 return sizeof(struct flowidn) / sizeof(flow_compare_t);
213 #define FLOW_DIR_IN 0
214 #define FLOW_DIR_OUT 1
215 #define FLOW_DIR_FWD 2
219 struct flow_cache_ops;
221 struct flow_cache_object {
222 const struct flow_cache_ops *ops;
225 struct flow_cache_ops {
226 struct flow_cache_object *(*get)(struct flow_cache_object *);
227 int (*check)(struct flow_cache_object *);
228 void (*delete)(struct flow_cache_object *);
231 typedef struct flow_cache_object *(*flow_resolve_t)(
232 struct net *net, const struct flowi *key, u16 family,
233 u8 dir, struct flow_cache_object *oldobj, void *ctx);
235 struct flow_cache_object *flow_cache_lookup(struct net *net,
236 const struct flowi *key, u16 family,
237 u8 dir, flow_resolve_t resolver,
239 int flow_cache_init(struct net *net);
240 void flow_cache_fini(struct net *net);
242 void flow_cache_flush(struct net *net);
243 void flow_cache_flush_deferred(struct net *net);
244 extern atomic_t flow_cache_genid;