Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
1da177e4 LT |
2 | /* |
3 | * | |
4 | * Generic internet FLOW. | |
5 | * | |
6 | */ | |
7 | ||
8 | #ifndef _NET_FLOW_H | |
9 | #define _NET_FLOW_H | |
10 | ||
aa1c366e | 11 | #include <linux/socket.h> |
1da177e4 | 12 | #include <linux/in6.h> |
60063497 | 13 | #include <linux/atomic.h> |
c6cc1ca7 | 14 | #include <net/flow_dissector.h> |
622ec2c9 | 15 | #include <linux/uidgid.h> |
1da177e4 | 16 | |
6a662719 CW |
17 | /* |
18 | * ifindex generation is per-net namespace, and loopback is | |
19 | * always the 1st device in ns (see net_dev_init), thus any | |
20 | * loopback device should get ifindex 1 | |
21 | */ | |
22 | ||
23 | #define LOOPBACK_IFINDEX 1 | |
24 | ||
1b7179d3 TG |
25 | struct flowi_tunnel { |
26 | __be64 tun_id; | |
27 | }; | |
28 | ||
806566cc DM |
29 | struct flowi_common { |
30 | int flowic_oif; | |
31 | int flowic_iif; | |
32 | __u32 flowic_mark; | |
33 | __u8 flowic_tos; | |
34 | __u8 flowic_scope; | |
35 | __u8 flowic_proto; | |
36 | __u8 flowic_flags; | |
fbef0a40 | 37 | #define FLOWI_FLAG_ANYSRC 0x01 |
0e0d44ab | 38 | #define FLOWI_FLAG_KNOWN_NH 0x02 |
c71ad3d4 | 39 | #define FLOWI_FLAG_SKIP_NH_OIF 0x04 |
806566cc | 40 | __u32 flowic_secid; |
622ec2c9 | 41 | kuid_t flowic_uid; |
bf1c3ab8 | 42 | struct flowi_tunnel flowic_tun_key; |
24ba1440 | 43 | __u32 flowic_multipath_hash; |
806566cc DM |
44 | }; |
45 | ||
08704bcb DM |
46 | union flowi_uli { |
47 | struct { | |
08704bcb | 48 | __be16 dport; |
9b12c75b | 49 | __be16 sport; |
08704bcb DM |
50 | } ports; |
51 | ||
52 | struct { | |
53 | __u8 type; | |
54 | __u8 code; | |
55 | } icmpt; | |
56 | ||
57 | struct { | |
08704bcb | 58 | __le16 dport; |
9b12c75b | 59 | __le16 sport; |
08704bcb DM |
60 | } dnports; |
61 | ||
08704bcb DM |
62 | __be32 gre_key; |
63 | ||
64 | struct { | |
65 | __u8 type; | |
66 | } mht; | |
67 | }; | |
68 | ||
56bb8059 DM |
69 | struct flowi4 { |
70 | struct flowi_common __fl_common; | |
22bd5b9b DM |
71 | #define flowi4_oif __fl_common.flowic_oif |
72 | #define flowi4_iif __fl_common.flowic_iif | |
73 | #define flowi4_mark __fl_common.flowic_mark | |
74 | #define flowi4_tos __fl_common.flowic_tos | |
75 | #define flowi4_scope __fl_common.flowic_scope | |
76 | #define flowi4_proto __fl_common.flowic_proto | |
77 | #define flowi4_flags __fl_common.flowic_flags | |
78 | #define flowi4_secid __fl_common.flowic_secid | |
1b7179d3 | 79 | #define flowi4_tun_key __fl_common.flowic_tun_key |
622ec2c9 | 80 | #define flowi4_uid __fl_common.flowic_uid |
24ba1440 | 81 | #define flowi4_multipath_hash __fl_common.flowic_multipath_hash |
84f9307c ED |
82 | |
83 | /* (saddr,daddr) must be grouped, same order as in IP header */ | |
56bb8059 | 84 | __be32 saddr; |
84f9307c ED |
85 | __be32 daddr; |
86 | ||
56bb8059 | 87 | union flowi_uli uli; |
9cce96df DM |
88 | #define fl4_sport uli.ports.sport |
89 | #define fl4_dport uli.ports.dport | |
90 | #define fl4_icmp_type uli.icmpt.type | |
91 | #define fl4_icmp_code uli.icmpt.code | |
9cce96df DM |
92 | #define fl4_mh_type uli.mht.type |
93 | #define fl4_gre_key uli.gre_key | |
728871bc | 94 | } __attribute__((__aligned__(BITS_PER_LONG/8))); |
56bb8059 | 95 | |
83229aa5 DM |
96 | static inline void flowi4_init_output(struct flowi4 *fl4, int oif, |
97 | __u32 mark, __u8 tos, __u8 scope, | |
98 | __u8 proto, __u8 flags, | |
99 | __be32 daddr, __be32 saddr, | |
e2d118a1 LC |
100 | __be16 dport, __be16 sport, |
101 | kuid_t uid) | |
83229aa5 DM |
102 | { |
103 | fl4->flowi4_oif = oif; | |
6a662719 | 104 | fl4->flowi4_iif = LOOPBACK_IFINDEX; |
83229aa5 DM |
105 | fl4->flowi4_mark = mark; |
106 | fl4->flowi4_tos = tos; | |
107 | fl4->flowi4_scope = scope; | |
108 | fl4->flowi4_proto = proto; | |
109 | fl4->flowi4_flags = flags; | |
110 | fl4->flowi4_secid = 0; | |
1b7179d3 | 111 | fl4->flowi4_tun_key.tun_id = 0; |
e2d118a1 | 112 | fl4->flowi4_uid = uid; |
83229aa5 DM |
113 | fl4->daddr = daddr; |
114 | fl4->saddr = saddr; | |
83229aa5 | 115 | fl4->fl4_dport = dport; |
9b12c75b | 116 | fl4->fl4_sport = sport; |
1869e226 | 117 | fl4->flowi4_multipath_hash = 0; |
83229aa5 | 118 | } |
e6b45241 JA |
119 | |
120 | /* Reset some input parameters after previous lookup */ | |
121 | static inline void flowi4_update_output(struct flowi4 *fl4, int oif, __u8 tos, | |
122 | __be32 daddr, __be32 saddr) | |
123 | { | |
124 | fl4->flowi4_oif = oif; | |
125 | fl4->flowi4_tos = tos; | |
126 | fl4->daddr = daddr; | |
127 | fl4->saddr = saddr; | |
128 | } | |
82695b30 | 129 | |
83229aa5 | 130 | |
56bb8059 | 131 | struct flowi6 { |
806566cc | 132 | struct flowi_common __fl_common; |
2032656e DM |
133 | #define flowi6_oif __fl_common.flowic_oif |
134 | #define flowi6_iif __fl_common.flowic_iif | |
135 | #define flowi6_mark __fl_common.flowic_mark | |
2032656e DM |
136 | #define flowi6_scope __fl_common.flowic_scope |
137 | #define flowi6_proto __fl_common.flowic_proto | |
138 | #define flowi6_flags __fl_common.flowic_flags | |
139 | #define flowi6_secid __fl_common.flowic_secid | |
904af04d | 140 | #define flowi6_tun_key __fl_common.flowic_tun_key |
622ec2c9 | 141 | #define flowi6_uid __fl_common.flowic_uid |
56bb8059 DM |
142 | struct in6_addr daddr; |
143 | struct in6_addr saddr; | |
69716a2b | 144 | /* Note: flowi6_tos is encoded in flowlabel, too. */ |
56bb8059 DM |
145 | __be32 flowlabel; |
146 | union flowi_uli uli; | |
1958b856 DM |
147 | #define fl6_sport uli.ports.sport |
148 | #define fl6_dport uli.ports.dport | |
149 | #define fl6_icmp_type uli.icmpt.type | |
150 | #define fl6_icmp_code uli.icmpt.code | |
1958b856 DM |
151 | #define fl6_mh_type uli.mht.type |
152 | #define fl6_gre_key uli.gre_key | |
29825717 | 153 | __u32 mp_hash; |
728871bc | 154 | } __attribute__((__aligned__(BITS_PER_LONG/8))); |
1da177e4 | 155 | |
56bb8059 DM |
156 | struct flowidn { |
157 | struct flowi_common __fl_common; | |
bef55aeb DM |
158 | #define flowidn_oif __fl_common.flowic_oif |
159 | #define flowidn_iif __fl_common.flowic_iif | |
160 | #define flowidn_mark __fl_common.flowic_mark | |
161 | #define flowidn_scope __fl_common.flowic_scope | |
162 | #define flowidn_proto __fl_common.flowic_proto | |
163 | #define flowidn_flags __fl_common.flowic_flags | |
56bb8059 DM |
164 | __le16 daddr; |
165 | __le16 saddr; | |
166 | union flowi_uli uli; | |
bef55aeb DM |
167 | #define fld_sport uli.ports.sport |
168 | #define fld_dport uli.ports.dport | |
728871bc | 169 | } __attribute__((__aligned__(BITS_PER_LONG/8))); |
56bb8059 DM |
170 | |
171 | struct flowi { | |
1da177e4 | 172 | union { |
56bb8059 DM |
173 | struct flowi_common __fl_common; |
174 | struct flowi4 ip4; | |
175 | struct flowi6 ip6; | |
176 | struct flowidn dn; | |
177 | } u; | |
178 | #define flowi_oif u.__fl_common.flowic_oif | |
179 | #define flowi_iif u.__fl_common.flowic_iif | |
180 | #define flowi_mark u.__fl_common.flowic_mark | |
181 | #define flowi_tos u.__fl_common.flowic_tos | |
182 | #define flowi_scope u.__fl_common.flowic_scope | |
183 | #define flowi_proto u.__fl_common.flowic_proto | |
184 | #define flowi_flags u.__fl_common.flowic_flags | |
185 | #define flowi_secid u.__fl_common.flowic_secid | |
1b7179d3 | 186 | #define flowi_tun_key u.__fl_common.flowic_tun_key |
622ec2c9 | 187 | #define flowi_uid u.__fl_common.flowic_uid |
1da177e4 LT |
188 | } __attribute__((__aligned__(BITS_PER_LONG/8))); |
189 | ||
59b1a94c DM |
190 | static inline struct flowi *flowi4_to_flowi(struct flowi4 *fl4) |
191 | { | |
192 | return container_of(fl4, struct flowi, u.ip4); | |
193 | } | |
194 | ||
3df98d79 PM |
195 | static inline struct flowi_common *flowi4_to_flowi_common(struct flowi4 *fl4) |
196 | { | |
b9edbfe1 | 197 | return &(fl4->__fl_common); |
3df98d79 PM |
198 | } |
199 | ||
59b1a94c DM |
200 | static inline struct flowi *flowi6_to_flowi(struct flowi6 *fl6) |
201 | { | |
202 | return container_of(fl6, struct flowi, u.ip6); | |
203 | } | |
204 | ||
3df98d79 PM |
205 | static inline struct flowi_common *flowi6_to_flowi_common(struct flowi6 *fl6) |
206 | { | |
b9edbfe1 | 207 | return &(fl6->__fl_common); |
3df98d79 PM |
208 | } |
209 | ||
59b1a94c DM |
210 | static inline struct flowi *flowidn_to_flowi(struct flowidn *fldn) |
211 | { | |
212 | return container_of(fldn, struct flowi, u.dn); | |
213 | } | |
214 | ||
20a17bf6 | 215 | __u32 __get_hash_from_flowi6(const struct flowi6 *fl6, struct flow_keys *keys); |
c6cc1ca7 | 216 | |
1da177e4 | 217 | #endif |