Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
[linux-2.6.git] / include / net / flow.h
1 /*
2  *
3  *      Generic internet FLOW.
4  *
5  */
6
7 #ifndef _NET_FLOW_H
8 #define _NET_FLOW_H
9
10 #include <linux/socket.h>
11 #include <linux/in6.h>
12 #include <linux/atomic.h>
13
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;
22 #define FLOWI_FLAG_ANYSRC               0x01
23 #define FLOWI_FLAG_PRECOW_METRICS       0x02
24 #define FLOWI_FLAG_CAN_SLEEP            0x04
25         __u32   flowic_secid;
26 };
27
28 union flowi_uli {
29         struct {
30                 __be16  dport;
31                 __be16  sport;
32         } ports;
33
34         struct {
35                 __u8    type;
36                 __u8    code;
37         } icmpt;
38
39         struct {
40                 __le16  dport;
41                 __le16  sport;
42         } dnports;
43
44         __be32          spi;
45         __be32          gre_key;
46
47         struct {
48                 __u8    type;
49         } mht;
50 };
51
52 struct flowi4 {
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
62         __be32                  daddr;
63         __be32                  saddr;
64         union flowi_uli         uli;
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)));
73
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)
79 {
80         fl4->flowi4_oif = oif;
81         fl4->flowi4_iif = 0;
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;
88         fl4->daddr = daddr;
89         fl4->saddr = saddr;
90         fl4->fl4_dport = dport;
91         fl4->fl4_sport = sport;
92 }
93                                       
94
95 struct flowi6 {
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;
107         __be32                  flowlabel;
108         union flowi_uli         uli;
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)));
117
118 struct flowidn {
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
126         __le16                  daddr;
127         __le16                  saddr;
128         union flowi_uli         uli;
129 #define fld_sport               uli.ports.sport
130 #define fld_dport               uli.ports.dport
131 } __attribute__((__aligned__(BITS_PER_LONG/8)));
132
133 struct flowi {
134         union {
135                 struct flowi_common     __fl_common;
136                 struct flowi4           ip4;
137                 struct flowi6           ip6;
138                 struct flowidn          dn;
139         } u;
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)));
149
150 static inline struct flowi *flowi4_to_flowi(struct flowi4 *fl4)
151 {
152         return container_of(fl4, struct flowi, u.ip4);
153 }
154
155 static inline struct flowi *flowi6_to_flowi(struct flowi6 *fl6)
156 {
157         return container_of(fl6, struct flowi, u.ip6);
158 }
159
160 static inline struct flowi *flowidn_to_flowi(struct flowidn *fldn)
161 {
162         return container_of(fldn, struct flowi, u.dn);
163 }
164
165 typedef unsigned long flow_compare_t;
166
167 static inline size_t flow_key_size(u16 family)
168 {
169         switch (family) {
170         case AF_INET:
171                 BUILD_BUG_ON(sizeof(struct flowi4) % sizeof(flow_compare_t));
172                 return sizeof(struct flowi4) / sizeof(flow_compare_t);
173         case AF_INET6:
174                 BUILD_BUG_ON(sizeof(struct flowi6) % sizeof(flow_compare_t));
175                 return sizeof(struct flowi6) / sizeof(flow_compare_t);
176         case AF_DECnet:
177                 BUILD_BUG_ON(sizeof(struct flowidn) % sizeof(flow_compare_t));
178                 return sizeof(struct flowidn) / sizeof(flow_compare_t);
179         }
180         return 0;
181 }
182
183 #define FLOW_DIR_IN     0
184 #define FLOW_DIR_OUT    1
185 #define FLOW_DIR_FWD    2
186
187 struct net;
188 struct sock;
189 struct flow_cache_ops;
190
191 struct flow_cache_object {
192         const struct flow_cache_ops *ops;
193 };
194
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 *);
199 };
200
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);
204
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);
208
209 extern void flow_cache_flush(void);
210 extern void flow_cache_flush_deferred(void);
211 extern atomic_t flow_cache_genid;
212
213 #endif