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[linux.git] / include / net / flow_offload.h
1 #ifndef _NET_FLOW_OFFLOAD_H
2 #define _NET_FLOW_OFFLOAD_H
3
4 #include <linux/kernel.h>
5 #include <net/flow_dissector.h>
6
7 struct flow_match {
8         struct flow_dissector   *dissector;
9         void                    *mask;
10         void                    *key;
11 };
12
13 struct flow_match_meta {
14         struct flow_dissector_key_meta *key, *mask;
15 };
16
17 struct flow_match_basic {
18         struct flow_dissector_key_basic *key, *mask;
19 };
20
21 struct flow_match_control {
22         struct flow_dissector_key_control *key, *mask;
23 };
24
25 struct flow_match_eth_addrs {
26         struct flow_dissector_key_eth_addrs *key, *mask;
27 };
28
29 struct flow_match_vlan {
30         struct flow_dissector_key_vlan *key, *mask;
31 };
32
33 struct flow_match_ipv4_addrs {
34         struct flow_dissector_key_ipv4_addrs *key, *mask;
35 };
36
37 struct flow_match_ipv6_addrs {
38         struct flow_dissector_key_ipv6_addrs *key, *mask;
39 };
40
41 struct flow_match_ip {
42         struct flow_dissector_key_ip *key, *mask;
43 };
44
45 struct flow_match_ports {
46         struct flow_dissector_key_ports *key, *mask;
47 };
48
49 struct flow_match_icmp {
50         struct flow_dissector_key_icmp *key, *mask;
51 };
52
53 struct flow_match_tcp {
54         struct flow_dissector_key_tcp *key, *mask;
55 };
56
57 struct flow_match_mpls {
58         struct flow_dissector_key_mpls *key, *mask;
59 };
60
61 struct flow_match_enc_keyid {
62         struct flow_dissector_key_keyid *key, *mask;
63 };
64
65 struct flow_match_enc_opts {
66         struct flow_dissector_key_enc_opts *key, *mask;
67 };
68
69 struct flow_rule;
70
71 void flow_rule_match_meta(const struct flow_rule *rule,
72                           struct flow_match_meta *out);
73 void flow_rule_match_basic(const struct flow_rule *rule,
74                            struct flow_match_basic *out);
75 void flow_rule_match_control(const struct flow_rule *rule,
76                              struct flow_match_control *out);
77 void flow_rule_match_eth_addrs(const struct flow_rule *rule,
78                                struct flow_match_eth_addrs *out);
79 void flow_rule_match_vlan(const struct flow_rule *rule,
80                           struct flow_match_vlan *out);
81 void flow_rule_match_cvlan(const struct flow_rule *rule,
82                            struct flow_match_vlan *out);
83 void flow_rule_match_ipv4_addrs(const struct flow_rule *rule,
84                                 struct flow_match_ipv4_addrs *out);
85 void flow_rule_match_ipv6_addrs(const struct flow_rule *rule,
86                                 struct flow_match_ipv6_addrs *out);
87 void flow_rule_match_ip(const struct flow_rule *rule,
88                         struct flow_match_ip *out);
89 void flow_rule_match_ports(const struct flow_rule *rule,
90                            struct flow_match_ports *out);
91 void flow_rule_match_tcp(const struct flow_rule *rule,
92                          struct flow_match_tcp *out);
93 void flow_rule_match_icmp(const struct flow_rule *rule,
94                           struct flow_match_icmp *out);
95 void flow_rule_match_mpls(const struct flow_rule *rule,
96                           struct flow_match_mpls *out);
97 void flow_rule_match_enc_control(const struct flow_rule *rule,
98                                  struct flow_match_control *out);
99 void flow_rule_match_enc_ipv4_addrs(const struct flow_rule *rule,
100                                     struct flow_match_ipv4_addrs *out);
101 void flow_rule_match_enc_ipv6_addrs(const struct flow_rule *rule,
102                                     struct flow_match_ipv6_addrs *out);
103 void flow_rule_match_enc_ip(const struct flow_rule *rule,
104                             struct flow_match_ip *out);
105 void flow_rule_match_enc_ports(const struct flow_rule *rule,
106                                struct flow_match_ports *out);
107 void flow_rule_match_enc_keyid(const struct flow_rule *rule,
108                                struct flow_match_enc_keyid *out);
109 void flow_rule_match_enc_opts(const struct flow_rule *rule,
110                               struct flow_match_enc_opts *out);
111
112 enum flow_action_id {
113         FLOW_ACTION_ACCEPT              = 0,
114         FLOW_ACTION_DROP,
115         FLOW_ACTION_TRAP,
116         FLOW_ACTION_GOTO,
117         FLOW_ACTION_REDIRECT,
118         FLOW_ACTION_MIRRED,
119         FLOW_ACTION_VLAN_PUSH,
120         FLOW_ACTION_VLAN_POP,
121         FLOW_ACTION_VLAN_MANGLE,
122         FLOW_ACTION_TUNNEL_ENCAP,
123         FLOW_ACTION_TUNNEL_DECAP,
124         FLOW_ACTION_MANGLE,
125         FLOW_ACTION_ADD,
126         FLOW_ACTION_CSUM,
127         FLOW_ACTION_MARK,
128         FLOW_ACTION_WAKE,
129         FLOW_ACTION_QUEUE,
130         FLOW_ACTION_SAMPLE,
131         FLOW_ACTION_POLICE,
132 };
133
134 /* This is mirroring enum pedit_header_type definition for easy mapping between
135  * tc pedit action. Legacy TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK is mapped to
136  * FLOW_ACT_MANGLE_UNSPEC, which is supported by no driver.
137  */
138 enum flow_action_mangle_base {
139         FLOW_ACT_MANGLE_UNSPEC          = 0,
140         FLOW_ACT_MANGLE_HDR_TYPE_ETH,
141         FLOW_ACT_MANGLE_HDR_TYPE_IP4,
142         FLOW_ACT_MANGLE_HDR_TYPE_IP6,
143         FLOW_ACT_MANGLE_HDR_TYPE_TCP,
144         FLOW_ACT_MANGLE_HDR_TYPE_UDP,
145 };
146
147 struct flow_action_entry {
148         enum flow_action_id             id;
149         union {
150                 u32                     chain_index;    /* FLOW_ACTION_GOTO */
151                 struct net_device       *dev;           /* FLOW_ACTION_REDIRECT */
152                 struct {                                /* FLOW_ACTION_VLAN */
153                         u16             vid;
154                         __be16          proto;
155                         u8              prio;
156                 } vlan;
157                 struct {                                /* FLOW_ACTION_PACKET_EDIT */
158                         enum flow_action_mangle_base htype;
159                         u32             offset;
160                         u32             mask;
161                         u32             val;
162                 } mangle;
163                 const struct ip_tunnel_info *tunnel;    /* FLOW_ACTION_TUNNEL_ENCAP */
164                 u32                     csum_flags;     /* FLOW_ACTION_CSUM */
165                 u32                     mark;           /* FLOW_ACTION_MARK */
166                 struct {                                /* FLOW_ACTION_QUEUE */
167                         u32             ctx;
168                         u32             index;
169                         u8              vf;
170                 } queue;
171                 struct {                                /* FLOW_ACTION_SAMPLE */
172                         struct psample_group    *psample_group;
173                         u32                     rate;
174                         u32                     trunc_size;
175                         bool                    truncate;
176                 } sample;
177                 struct {                                /* FLOW_ACTION_POLICE */
178                         s64                     burst;
179                         u64                     rate_bytes_ps;
180                 } police;
181         };
182 };
183
184 struct flow_action {
185         unsigned int                    num_entries;
186         struct flow_action_entry        entries[0];
187 };
188
189 static inline bool flow_action_has_entries(const struct flow_action *action)
190 {
191         return action->num_entries;
192 }
193
194 /**
195  * flow_action_has_one_action() - check if exactly one action is present
196  * @action: tc filter flow offload action
197  *
198  * Returns true if exactly one action is present.
199  */
200 static inline bool flow_offload_has_one_action(const struct flow_action *action)
201 {
202         return action->num_entries == 1;
203 }
204
205 #define flow_action_for_each(__i, __act, __actions)                     \
206         for (__i = 0, __act = &(__actions)->entries[0]; __i < (__actions)->num_entries; __act = &(__actions)->entries[++__i])
207
208 struct flow_rule {
209         struct flow_match       match;
210         struct flow_action      action;
211 };
212
213 struct flow_rule *flow_rule_alloc(unsigned int num_actions);
214
215 static inline bool flow_rule_match_key(const struct flow_rule *rule,
216                                        enum flow_dissector_key_id key)
217 {
218         return dissector_uses_key(rule->match.dissector, key);
219 }
220
221 struct flow_stats {
222         u64     pkts;
223         u64     bytes;
224         u64     lastused;
225 };
226
227 static inline void flow_stats_update(struct flow_stats *flow_stats,
228                                      u64 bytes, u64 pkts, u64 lastused)
229 {
230         flow_stats->pkts        += pkts;
231         flow_stats->bytes       += bytes;
232         flow_stats->lastused    = max_t(u64, flow_stats->lastused, lastused);
233 }
234
235 #endif /* _NET_FLOW_OFFLOAD_H */
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