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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
14struct 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
28union 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
52struct 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
74static 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
95struct 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
118struct 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
133struct 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
150static inline struct flowi *flowi4_to_flowi(struct flowi4 *fl4)
151{
152 return container_of(fl4, struct flowi, u.ip4);
153}
154
155static inline struct flowi *flowi6_to_flowi(struct flowi6 *fl6)
156{
157 return container_of(fl6, struct flowi, u.ip6);
158}
159
160static inline struct flowi *flowidn_to_flowi(struct flowidn *fldn)
161{
162 return container_of(fldn, struct flowi, u.dn);
163}
164
165typedef unsigned long flow_compare_t;
166
167static 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
187struct net;
188struct sock;
189struct flow_cache_ops;
190
191struct flow_cache_object {
192 const struct flow_cache_ops *ops;
193};
194
195struct 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
201typedef 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
205extern 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
209extern void flow_cache_flush(void);
210extern atomic_t flow_cache_genid;
211
212#endif
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#include <net/flow_dissector.h>
14
15/*
16 * ifindex generation is per-net namespace, and loopback is
17 * always the 1st device in ns (see net_dev_init), thus any
18 * loopback device should get ifindex 1
19 */
20
21#define LOOPBACK_IFINDEX 1
22
23struct flowi_tunnel {
24 __be64 tun_id;
25};
26
27struct flowi_common {
28 int flowic_oif;
29 int flowic_iif;
30 __u32 flowic_mark;
31 __u8 flowic_tos;
32 __u8 flowic_scope;
33 __u8 flowic_proto;
34 __u8 flowic_flags;
35#define FLOWI_FLAG_ANYSRC 0x01
36#define FLOWI_FLAG_KNOWN_NH 0x02
37#define FLOWI_FLAG_L3MDEV_SRC 0x04
38#define FLOWI_FLAG_SKIP_NH_OIF 0x08
39 __u32 flowic_secid;
40 struct flowi_tunnel flowic_tun_key;
41};
42
43union flowi_uli {
44 struct {
45 __be16 dport;
46 __be16 sport;
47 } ports;
48
49 struct {
50 __u8 type;
51 __u8 code;
52 } icmpt;
53
54 struct {
55 __le16 dport;
56 __le16 sport;
57 } dnports;
58
59 __be32 spi;
60 __be32 gre_key;
61
62 struct {
63 __u8 type;
64 } mht;
65};
66
67struct flowi4 {
68 struct flowi_common __fl_common;
69#define flowi4_oif __fl_common.flowic_oif
70#define flowi4_iif __fl_common.flowic_iif
71#define flowi4_mark __fl_common.flowic_mark
72#define flowi4_tos __fl_common.flowic_tos
73#define flowi4_scope __fl_common.flowic_scope
74#define flowi4_proto __fl_common.flowic_proto
75#define flowi4_flags __fl_common.flowic_flags
76#define flowi4_secid __fl_common.flowic_secid
77#define flowi4_tun_key __fl_common.flowic_tun_key
78
79 /* (saddr,daddr) must be grouped, same order as in IP header */
80 __be32 saddr;
81 __be32 daddr;
82
83 union flowi_uli uli;
84#define fl4_sport uli.ports.sport
85#define fl4_dport uli.ports.dport
86#define fl4_icmp_type uli.icmpt.type
87#define fl4_icmp_code uli.icmpt.code
88#define fl4_ipsec_spi uli.spi
89#define fl4_mh_type uli.mht.type
90#define fl4_gre_key uli.gre_key
91} __attribute__((__aligned__(BITS_PER_LONG/8)));
92
93static inline void flowi4_init_output(struct flowi4 *fl4, int oif,
94 __u32 mark, __u8 tos, __u8 scope,
95 __u8 proto, __u8 flags,
96 __be32 daddr, __be32 saddr,
97 __be16 dport, __be16 sport)
98{
99 fl4->flowi4_oif = oif;
100 fl4->flowi4_iif = LOOPBACK_IFINDEX;
101 fl4->flowi4_mark = mark;
102 fl4->flowi4_tos = tos;
103 fl4->flowi4_scope = scope;
104 fl4->flowi4_proto = proto;
105 fl4->flowi4_flags = flags;
106 fl4->flowi4_secid = 0;
107 fl4->flowi4_tun_key.tun_id = 0;
108 fl4->daddr = daddr;
109 fl4->saddr = saddr;
110 fl4->fl4_dport = dport;
111 fl4->fl4_sport = sport;
112}
113
114/* Reset some input parameters after previous lookup */
115static inline void flowi4_update_output(struct flowi4 *fl4, int oif, __u8 tos,
116 __be32 daddr, __be32 saddr)
117{
118 fl4->flowi4_oif = oif;
119 fl4->flowi4_tos = tos;
120 fl4->daddr = daddr;
121 fl4->saddr = saddr;
122}
123
124
125struct flowi6 {
126 struct flowi_common __fl_common;
127#define flowi6_oif __fl_common.flowic_oif
128#define flowi6_iif __fl_common.flowic_iif
129#define flowi6_mark __fl_common.flowic_mark
130#define flowi6_scope __fl_common.flowic_scope
131#define flowi6_proto __fl_common.flowic_proto
132#define flowi6_flags __fl_common.flowic_flags
133#define flowi6_secid __fl_common.flowic_secid
134#define flowi6_tun_key __fl_common.flowic_tun_key
135 struct in6_addr daddr;
136 struct in6_addr saddr;
137 /* Note: flowi6_tos is encoded in flowlabel, too. */
138 __be32 flowlabel;
139 union flowi_uli uli;
140#define fl6_sport uli.ports.sport
141#define fl6_dport uli.ports.dport
142#define fl6_icmp_type uli.icmpt.type
143#define fl6_icmp_code uli.icmpt.code
144#define fl6_ipsec_spi uli.spi
145#define fl6_mh_type uli.mht.type
146#define fl6_gre_key uli.gre_key
147} __attribute__((__aligned__(BITS_PER_LONG/8)));
148
149struct flowidn {
150 struct flowi_common __fl_common;
151#define flowidn_oif __fl_common.flowic_oif
152#define flowidn_iif __fl_common.flowic_iif
153#define flowidn_mark __fl_common.flowic_mark
154#define flowidn_scope __fl_common.flowic_scope
155#define flowidn_proto __fl_common.flowic_proto
156#define flowidn_flags __fl_common.flowic_flags
157 __le16 daddr;
158 __le16 saddr;
159 union flowi_uli uli;
160#define fld_sport uli.ports.sport
161#define fld_dport uli.ports.dport
162} __attribute__((__aligned__(BITS_PER_LONG/8)));
163
164struct flowi {
165 union {
166 struct flowi_common __fl_common;
167 struct flowi4 ip4;
168 struct flowi6 ip6;
169 struct flowidn dn;
170 } u;
171#define flowi_oif u.__fl_common.flowic_oif
172#define flowi_iif u.__fl_common.flowic_iif
173#define flowi_mark u.__fl_common.flowic_mark
174#define flowi_tos u.__fl_common.flowic_tos
175#define flowi_scope u.__fl_common.flowic_scope
176#define flowi_proto u.__fl_common.flowic_proto
177#define flowi_flags u.__fl_common.flowic_flags
178#define flowi_secid u.__fl_common.flowic_secid
179#define flowi_tun_key u.__fl_common.flowic_tun_key
180} __attribute__((__aligned__(BITS_PER_LONG/8)));
181
182static inline struct flowi *flowi4_to_flowi(struct flowi4 *fl4)
183{
184 return container_of(fl4, struct flowi, u.ip4);
185}
186
187static inline struct flowi *flowi6_to_flowi(struct flowi6 *fl6)
188{
189 return container_of(fl6, struct flowi, u.ip6);
190}
191
192static inline struct flowi *flowidn_to_flowi(struct flowidn *fldn)
193{
194 return container_of(fldn, struct flowi, u.dn);
195}
196
197typedef unsigned long flow_compare_t;
198
199static inline size_t flow_key_size(u16 family)
200{
201 switch (family) {
202 case AF_INET:
203 BUILD_BUG_ON(sizeof(struct flowi4) % sizeof(flow_compare_t));
204 return sizeof(struct flowi4) / sizeof(flow_compare_t);
205 case AF_INET6:
206 BUILD_BUG_ON(sizeof(struct flowi6) % sizeof(flow_compare_t));
207 return sizeof(struct flowi6) / sizeof(flow_compare_t);
208 case AF_DECnet:
209 BUILD_BUG_ON(sizeof(struct flowidn) % sizeof(flow_compare_t));
210 return sizeof(struct flowidn) / sizeof(flow_compare_t);
211 }
212 return 0;
213}
214
215#define FLOW_DIR_IN 0
216#define FLOW_DIR_OUT 1
217#define FLOW_DIR_FWD 2
218
219struct net;
220struct sock;
221struct flow_cache_ops;
222
223struct flow_cache_object {
224 const struct flow_cache_ops *ops;
225};
226
227struct flow_cache_ops {
228 struct flow_cache_object *(*get)(struct flow_cache_object *);
229 int (*check)(struct flow_cache_object *);
230 void (*delete)(struct flow_cache_object *);
231};
232
233typedef struct flow_cache_object *(*flow_resolve_t)(
234 struct net *net, const struct flowi *key, u16 family,
235 u8 dir, struct flow_cache_object *oldobj, void *ctx);
236
237struct flow_cache_object *flow_cache_lookup(struct net *net,
238 const struct flowi *key, u16 family,
239 u8 dir, flow_resolve_t resolver,
240 void *ctx);
241int flow_cache_init(struct net *net);
242void flow_cache_fini(struct net *net);
243
244void flow_cache_flush(struct net *net);
245void flow_cache_flush_deferred(struct net *net);
246extern atomic_t flow_cache_genid;
247
248__u32 __get_hash_from_flowi6(const struct flowi6 *fl6, struct flow_keys *keys);
249
250static inline __u32 get_hash_from_flowi6(const struct flowi6 *fl6)
251{
252 struct flow_keys keys;
253
254 return __get_hash_from_flowi6(fl6, &keys);
255}
256
257__u32 __get_hash_from_flowi4(const struct flowi4 *fl4, struct flow_keys *keys);
258
259static inline __u32 get_hash_from_flowi4(const struct flowi4 *fl4)
260{
261 struct flow_keys keys;
262
263 return __get_hash_from_flowi4(fl4, &keys);
264}
265
266#endif