Commit | Line | Data |
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1bd758eb JP |
1 | #ifndef _NET_FLOW_DISSECTOR_H |
2 | #define _NET_FLOW_DISSECTOR_H | |
0744dd00 | 3 | |
c3f8eaeb | 4 | #include <linux/types.h> |
b924933c | 5 | #include <linux/in6.h> |
67a900cc | 6 | #include <uapi/linux/if_ether.h> |
c3f8eaeb | 7 | |
42aecaa9 TH |
8 | /** |
9 | * struct flow_dissector_key_control: | |
10 | * @thoff: Transport header offset | |
11 | */ | |
12 | struct flow_dissector_key_control { | |
13 | u16 thoff; | |
c3f83241 | 14 | u16 addr_type; |
4b36993d | 15 | u32 flags; |
42aecaa9 TH |
16 | }; |
17 | ||
4b36993d DM |
18 | #define FLOW_DIS_IS_FRAGMENT BIT(0) |
19 | #define FLOW_DIS_FIRST_FRAG BIT(1) | |
20 | #define FLOW_DIS_ENCAPSULATION BIT(2) | |
21 | ||
fbff949e JP |
22 | /** |
23 | * struct flow_dissector_key_basic: | |
24 | * @thoff: Transport header offset | |
25 | * @n_proto: Network header protocol (eg. IPv4/IPv6) | |
26 | * @ip_proto: Transport header protocol (eg. TCP/UDP) | |
27 | */ | |
28 | struct flow_dissector_key_basic { | |
fbff949e JP |
29 | __be16 n_proto; |
30 | u8 ip_proto; | |
42aecaa9 | 31 | u8 padding; |
fbff949e JP |
32 | }; |
33 | ||
d34af823 | 34 | struct flow_dissector_key_tags { |
f6a66927 HHZ |
35 | u32 flow_label; |
36 | }; | |
37 | ||
38 | struct flow_dissector_key_vlan { | |
39 | u16 vlan_id:12, | |
40 | vlan_priority:3; | |
41 | u16 padding; | |
d34af823 TH |
42 | }; |
43 | ||
1fdd512c TH |
44 | struct flow_dissector_key_keyid { |
45 | __be32 keyid; | |
46 | }; | |
47 | ||
fbff949e | 48 | /** |
c3f83241 TH |
49 | * struct flow_dissector_key_ipv4_addrs: |
50 | * @src: source ip address | |
51 | * @dst: destination ip address | |
fbff949e | 52 | */ |
c3f83241 | 53 | struct flow_dissector_key_ipv4_addrs { |
fbff949e JP |
54 | /* (src,dst) must be grouped, in the same way than in IP header */ |
55 | __be32 src; | |
56 | __be32 dst; | |
57 | }; | |
58 | ||
c3f83241 TH |
59 | /** |
60 | * struct flow_dissector_key_ipv6_addrs: | |
61 | * @src: source ip address | |
62 | * @dst: destination ip address | |
63 | */ | |
64 | struct flow_dissector_key_ipv6_addrs { | |
65 | /* (src,dst) must be grouped, in the same way than in IP header */ | |
66 | struct in6_addr src; | |
67 | struct in6_addr dst; | |
68 | }; | |
69 | ||
9f249089 TH |
70 | /** |
71 | * struct flow_dissector_key_tipc_addrs: | |
72 | * @srcnode: source node address | |
73 | */ | |
74 | struct flow_dissector_key_tipc_addrs { | |
75 | __be32 srcnode; | |
76 | }; | |
77 | ||
c3f83241 TH |
78 | /** |
79 | * struct flow_dissector_key_addrs: | |
80 | * @v4addrs: IPv4 addresses | |
81 | * @v6addrs: IPv6 addresses | |
82 | */ | |
83 | struct flow_dissector_key_addrs { | |
84 | union { | |
85 | struct flow_dissector_key_ipv4_addrs v4addrs; | |
86 | struct flow_dissector_key_ipv6_addrs v6addrs; | |
9f249089 | 87 | struct flow_dissector_key_tipc_addrs tipcaddrs; |
c3f83241 TH |
88 | }; |
89 | }; | |
90 | ||
fbff949e JP |
91 | /** |
92 | * flow_dissector_key_tp_ports: | |
93 | * @ports: port numbers of Transport header | |
59346afe JP |
94 | * src: source port number |
95 | * dst: destination port number | |
fbff949e JP |
96 | */ |
97 | struct flow_dissector_key_ports { | |
98 | union { | |
99 | __be32 ports; | |
59346afe JP |
100 | struct { |
101 | __be16 src; | |
102 | __be16 dst; | |
103 | }; | |
fbff949e JP |
104 | }; |
105 | }; | |
106 | ||
972d3876 SH |
107 | /** |
108 | * flow_dissector_key_icmp: | |
109 | * @ports: type and code of ICMP header | |
110 | * icmp: ICMP type (high) and code (low) | |
111 | * type: ICMP type | |
112 | * code: ICMP code | |
113 | */ | |
114 | struct flow_dissector_key_icmp { | |
115 | union { | |
116 | __be16 icmp; | |
117 | struct { | |
118 | u8 type; | |
119 | u8 code; | |
120 | }; | |
121 | }; | |
122 | }; | |
b924933c | 123 | |
67a900cc JP |
124 | /** |
125 | * struct flow_dissector_key_eth_addrs: | |
126 | * @src: source Ethernet address | |
127 | * @dst: destination Ethernet address | |
128 | */ | |
129 | struct flow_dissector_key_eth_addrs { | |
130 | /* (dst,src) must be grouped, in the same way than in ETH header */ | |
131 | unsigned char dst[ETH_ALEN]; | |
132 | unsigned char src[ETH_ALEN]; | |
133 | }; | |
134 | ||
fbff949e | 135 | enum flow_dissector_key_id { |
42aecaa9 | 136 | FLOW_DISSECTOR_KEY_CONTROL, /* struct flow_dissector_key_control */ |
fbff949e | 137 | FLOW_DISSECTOR_KEY_BASIC, /* struct flow_dissector_key_basic */ |
c3f83241 TH |
138 | FLOW_DISSECTOR_KEY_IPV4_ADDRS, /* struct flow_dissector_key_ipv4_addrs */ |
139 | FLOW_DISSECTOR_KEY_IPV6_ADDRS, /* struct flow_dissector_key_ipv6_addrs */ | |
fbff949e | 140 | FLOW_DISSECTOR_KEY_PORTS, /* struct flow_dissector_key_ports */ |
972d3876 | 141 | FLOW_DISSECTOR_KEY_ICMP, /* struct flow_dissector_key_icmp */ |
67a900cc | 142 | FLOW_DISSECTOR_KEY_ETH_ADDRS, /* struct flow_dissector_key_eth_addrs */ |
9f249089 | 143 | FLOW_DISSECTOR_KEY_TIPC_ADDRS, /* struct flow_dissector_key_tipc_addrs */ |
f6a66927 | 144 | FLOW_DISSECTOR_KEY_VLAN, /* struct flow_dissector_key_flow_vlan */ |
87ee9e52 | 145 | FLOW_DISSECTOR_KEY_FLOW_LABEL, /* struct flow_dissector_key_flow_tags */ |
1fdd512c | 146 | FLOW_DISSECTOR_KEY_GRE_KEYID, /* struct flow_dissector_key_keyid */ |
b3baa0fb | 147 | FLOW_DISSECTOR_KEY_MPLS_ENTROPY, /* struct flow_dissector_key_keyid */ |
9ba6a9a9 HHZ |
148 | FLOW_DISSECTOR_KEY_ENC_KEYID, /* struct flow_dissector_key_keyid */ |
149 | FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS, /* struct flow_dissector_key_ipv4_addrs */ | |
150 | FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS, /* struct flow_dissector_key_ipv6_addrs */ | |
151 | FLOW_DISSECTOR_KEY_ENC_CONTROL, /* struct flow_dissector_key_control */ | |
f4d997fd | 152 | FLOW_DISSECTOR_KEY_ENC_PORTS, /* struct flow_dissector_key_ports */ |
fbff949e JP |
153 | |
154 | FLOW_DISSECTOR_KEY_MAX, | |
155 | }; | |
156 | ||
807e165d | 157 | #define FLOW_DISSECTOR_F_PARSE_1ST_FRAG BIT(0) |
8306b688 | 158 | #define FLOW_DISSECTOR_F_STOP_AT_L3 BIT(1) |
872b1abb | 159 | #define FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL BIT(2) |
823b9693 | 160 | #define FLOW_DISSECTOR_F_STOP_AT_ENCAP BIT(3) |
807e165d | 161 | |
fbff949e JP |
162 | struct flow_dissector_key { |
163 | enum flow_dissector_key_id key_id; | |
164 | size_t offset; /* offset of struct flow_dissector_key_* | |
165 | in target the struct */ | |
166 | }; | |
167 | ||
168 | struct flow_dissector { | |
169 | unsigned int used_keys; /* each bit repesents presence of one key id */ | |
170 | unsigned short int offset[FLOW_DISSECTOR_KEY_MAX]; | |
171 | }; | |
172 | ||
06635a35 | 173 | struct flow_keys { |
42aecaa9 TH |
174 | struct flow_dissector_key_control control; |
175 | #define FLOW_KEYS_HASH_START_FIELD basic | |
06635a35 | 176 | struct flow_dissector_key_basic basic; |
d34af823 | 177 | struct flow_dissector_key_tags tags; |
f6a66927 | 178 | struct flow_dissector_key_vlan vlan; |
1fdd512c | 179 | struct flow_dissector_key_keyid keyid; |
42aecaa9 TH |
180 | struct flow_dissector_key_ports ports; |
181 | struct flow_dissector_key_addrs addrs; | |
06635a35 JP |
182 | }; |
183 | ||
42aecaa9 TH |
184 | #define FLOW_KEYS_HASH_OFFSET \ |
185 | offsetof(struct flow_keys, FLOW_KEYS_HASH_START_FIELD) | |
186 | ||
c3f83241 TH |
187 | __be32 flow_get_u32_src(const struct flow_keys *flow); |
188 | __be32 flow_get_u32_dst(const struct flow_keys *flow); | |
189 | ||
06635a35 JP |
190 | extern struct flow_dissector flow_keys_dissector; |
191 | extern struct flow_dissector flow_keys_buf_dissector; | |
192 | ||
2f59e1eb TH |
193 | /* struct flow_keys_digest: |
194 | * | |
195 | * This structure is used to hold a digest of the full flow keys. This is a | |
196 | * larger "hash" of a flow to allow definitively matching specific flows where | |
197 | * the 32 bit skb->hash is not large enough. The size is limited to 16 bytes so | |
198 | * that it can by used in CB of skb (see sch_choke for an example). | |
199 | */ | |
200 | #define FLOW_KEYS_DIGEST_LEN 16 | |
201 | struct flow_keys_digest { | |
202 | u8 data[FLOW_KEYS_DIGEST_LEN]; | |
203 | }; | |
204 | ||
205 | void make_flow_keys_digest(struct flow_keys_digest *digest, | |
206 | const struct flow_keys *flow); | |
207 | ||
66fdd05e | 208 | static inline bool flow_keys_have_l4(const struct flow_keys *keys) |
bcc83839 TH |
209 | { |
210 | return (keys->ports.ports || keys->tags.flow_label); | |
211 | } | |
212 | ||
c6cc1ca7 TH |
213 | u32 flow_hash_from_keys(struct flow_keys *keys); |
214 | ||
8de2d793 AV |
215 | static inline bool dissector_uses_key(const struct flow_dissector *flow_dissector, |
216 | enum flow_dissector_key_id key_id) | |
217 | { | |
218 | return flow_dissector->used_keys & (1 << key_id); | |
219 | } | |
220 | ||
221 | static inline void *skb_flow_dissector_target(struct flow_dissector *flow_dissector, | |
222 | enum flow_dissector_key_id key_id, | |
223 | void *target_container) | |
224 | { | |
225 | return ((char *)target_container) + flow_dissector->offset[key_id]; | |
226 | } | |
227 | ||
0744dd00 | 228 | #endif |