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 { |
87ee9e52 TH |
35 | u32 vlan_id:12, |
36 | flow_label:20; | |
d34af823 TH |
37 | }; |
38 | ||
1fdd512c TH |
39 | struct flow_dissector_key_keyid { |
40 | __be32 keyid; | |
41 | }; | |
42 | ||
fbff949e | 43 | /** |
c3f83241 TH |
44 | * struct flow_dissector_key_ipv4_addrs: |
45 | * @src: source ip address | |
46 | * @dst: destination ip address | |
fbff949e | 47 | */ |
c3f83241 | 48 | struct flow_dissector_key_ipv4_addrs { |
fbff949e JP |
49 | /* (src,dst) must be grouped, in the same way than in IP header */ |
50 | __be32 src; | |
51 | __be32 dst; | |
52 | }; | |
53 | ||
c3f83241 TH |
54 | /** |
55 | * struct flow_dissector_key_ipv6_addrs: | |
56 | * @src: source ip address | |
57 | * @dst: destination ip address | |
58 | */ | |
59 | struct flow_dissector_key_ipv6_addrs { | |
60 | /* (src,dst) must be grouped, in the same way than in IP header */ | |
61 | struct in6_addr src; | |
62 | struct in6_addr dst; | |
63 | }; | |
64 | ||
9f249089 TH |
65 | /** |
66 | * struct flow_dissector_key_tipc_addrs: | |
67 | * @srcnode: source node address | |
68 | */ | |
69 | struct flow_dissector_key_tipc_addrs { | |
70 | __be32 srcnode; | |
71 | }; | |
72 | ||
c3f83241 TH |
73 | /** |
74 | * struct flow_dissector_key_addrs: | |
75 | * @v4addrs: IPv4 addresses | |
76 | * @v6addrs: IPv6 addresses | |
77 | */ | |
78 | struct flow_dissector_key_addrs { | |
79 | union { | |
80 | struct flow_dissector_key_ipv4_addrs v4addrs; | |
81 | struct flow_dissector_key_ipv6_addrs v6addrs; | |
9f249089 | 82 | struct flow_dissector_key_tipc_addrs tipcaddrs; |
c3f83241 TH |
83 | }; |
84 | }; | |
85 | ||
fbff949e JP |
86 | /** |
87 | * flow_dissector_key_tp_ports: | |
88 | * @ports: port numbers of Transport header | |
59346afe JP |
89 | * src: source port number |
90 | * dst: destination port number | |
fbff949e JP |
91 | */ |
92 | struct flow_dissector_key_ports { | |
93 | union { | |
94 | __be32 ports; | |
59346afe JP |
95 | struct { |
96 | __be16 src; | |
97 | __be16 dst; | |
98 | }; | |
fbff949e JP |
99 | }; |
100 | }; | |
101 | ||
b924933c | 102 | |
67a900cc JP |
103 | /** |
104 | * struct flow_dissector_key_eth_addrs: | |
105 | * @src: source Ethernet address | |
106 | * @dst: destination Ethernet address | |
107 | */ | |
108 | struct flow_dissector_key_eth_addrs { | |
109 | /* (dst,src) must be grouped, in the same way than in ETH header */ | |
110 | unsigned char dst[ETH_ALEN]; | |
111 | unsigned char src[ETH_ALEN]; | |
112 | }; | |
113 | ||
fbff949e | 114 | enum flow_dissector_key_id { |
42aecaa9 | 115 | FLOW_DISSECTOR_KEY_CONTROL, /* struct flow_dissector_key_control */ |
fbff949e | 116 | FLOW_DISSECTOR_KEY_BASIC, /* struct flow_dissector_key_basic */ |
c3f83241 TH |
117 | FLOW_DISSECTOR_KEY_IPV4_ADDRS, /* struct flow_dissector_key_ipv4_addrs */ |
118 | FLOW_DISSECTOR_KEY_IPV6_ADDRS, /* struct flow_dissector_key_ipv6_addrs */ | |
fbff949e | 119 | FLOW_DISSECTOR_KEY_PORTS, /* struct flow_dissector_key_ports */ |
67a900cc | 120 | FLOW_DISSECTOR_KEY_ETH_ADDRS, /* struct flow_dissector_key_eth_addrs */ |
9f249089 | 121 | FLOW_DISSECTOR_KEY_TIPC_ADDRS, /* struct flow_dissector_key_tipc_addrs */ |
d34af823 | 122 | FLOW_DISSECTOR_KEY_VLANID, /* struct flow_dissector_key_flow_tags */ |
87ee9e52 | 123 | FLOW_DISSECTOR_KEY_FLOW_LABEL, /* struct flow_dissector_key_flow_tags */ |
1fdd512c | 124 | FLOW_DISSECTOR_KEY_GRE_KEYID, /* struct flow_dissector_key_keyid */ |
b3baa0fb | 125 | FLOW_DISSECTOR_KEY_MPLS_ENTROPY, /* struct flow_dissector_key_keyid */ |
fbff949e JP |
126 | |
127 | FLOW_DISSECTOR_KEY_MAX, | |
128 | }; | |
129 | ||
807e165d | 130 | #define FLOW_DISSECTOR_F_PARSE_1ST_FRAG BIT(0) |
8306b688 | 131 | #define FLOW_DISSECTOR_F_STOP_AT_L3 BIT(1) |
872b1abb | 132 | #define FLOW_DISSECTOR_F_STOP_AT_FLOW_LABEL BIT(2) |
823b9693 | 133 | #define FLOW_DISSECTOR_F_STOP_AT_ENCAP BIT(3) |
807e165d | 134 | |
fbff949e JP |
135 | struct flow_dissector_key { |
136 | enum flow_dissector_key_id key_id; | |
137 | size_t offset; /* offset of struct flow_dissector_key_* | |
138 | in target the struct */ | |
139 | }; | |
140 | ||
141 | struct flow_dissector { | |
142 | unsigned int used_keys; /* each bit repesents presence of one key id */ | |
143 | unsigned short int offset[FLOW_DISSECTOR_KEY_MAX]; | |
144 | }; | |
145 | ||
06635a35 | 146 | struct flow_keys { |
42aecaa9 TH |
147 | struct flow_dissector_key_control control; |
148 | #define FLOW_KEYS_HASH_START_FIELD basic | |
06635a35 | 149 | struct flow_dissector_key_basic basic; |
d34af823 | 150 | struct flow_dissector_key_tags tags; |
1fdd512c | 151 | struct flow_dissector_key_keyid keyid; |
42aecaa9 TH |
152 | struct flow_dissector_key_ports ports; |
153 | struct flow_dissector_key_addrs addrs; | |
06635a35 JP |
154 | }; |
155 | ||
42aecaa9 TH |
156 | #define FLOW_KEYS_HASH_OFFSET \ |
157 | offsetof(struct flow_keys, FLOW_KEYS_HASH_START_FIELD) | |
158 | ||
c3f83241 TH |
159 | __be32 flow_get_u32_src(const struct flow_keys *flow); |
160 | __be32 flow_get_u32_dst(const struct flow_keys *flow); | |
161 | ||
06635a35 JP |
162 | extern struct flow_dissector flow_keys_dissector; |
163 | extern struct flow_dissector flow_keys_buf_dissector; | |
164 | ||
2f59e1eb TH |
165 | /* struct flow_keys_digest: |
166 | * | |
167 | * This structure is used to hold a digest of the full flow keys. This is a | |
168 | * larger "hash" of a flow to allow definitively matching specific flows where | |
169 | * the 32 bit skb->hash is not large enough. The size is limited to 16 bytes so | |
170 | * that it can by used in CB of skb (see sch_choke for an example). | |
171 | */ | |
172 | #define FLOW_KEYS_DIGEST_LEN 16 | |
173 | struct flow_keys_digest { | |
174 | u8 data[FLOW_KEYS_DIGEST_LEN]; | |
175 | }; | |
176 | ||
177 | void make_flow_keys_digest(struct flow_keys_digest *digest, | |
178 | const struct flow_keys *flow); | |
179 | ||
bcc83839 TH |
180 | static inline bool flow_keys_have_l4(struct flow_keys *keys) |
181 | { | |
182 | return (keys->ports.ports || keys->tags.flow_label); | |
183 | } | |
184 | ||
c6cc1ca7 TH |
185 | u32 flow_hash_from_keys(struct flow_keys *keys); |
186 | ||
8de2d793 AV |
187 | static inline bool dissector_uses_key(const struct flow_dissector *flow_dissector, |
188 | enum flow_dissector_key_id key_id) | |
189 | { | |
190 | return flow_dissector->used_keys & (1 << key_id); | |
191 | } | |
192 | ||
193 | static inline void *skb_flow_dissector_target(struct flow_dissector *flow_dissector, | |
194 | enum flow_dissector_key_id key_id, | |
195 | void *target_container) | |
196 | { | |
197 | return ((char *)target_container) + flow_dissector->offset[key_id]; | |
198 | } | |
199 | ||
0744dd00 | 200 | #endif |