1 #ifndef _NET_FLOW_OFFLOAD_H
2 #define _NET_FLOW_OFFLOAD_H
3
4 #include <linux/kernel.h>
5 #include <linux/list.h>
6 #include <net/flow_dissector.h>
7 #include <linux/rhashtable.h>
8
9 struct flow_match {
10 struct flow_dissector *dissector;
11 void *mask;
12 void *key;
13 };
14
15 struct flow_match_meta {
16 struct flow_dissector_key_meta *key, *mask;
17 };
18
19 struct flow_match_basic {
20 struct flow_dissector_key_basic *key, *mask;
21 };
22
23 struct flow_match_control {
24 struct flow_dissector_key_control *key, *mask;
25 };
26
27 struct flow_match_eth_addrs {
28 struct flow_dissector_key_eth_addrs *key, *mask;
29 };
30
31 struct flow_match_vlan {
32 struct flow_dissector_key_vlan *key, *mask;
33 };
34
35 struct flow_match_ipv4_addrs {
36 struct flow_dissector_key_ipv4_addrs *key, *mask;
37 };
38
39 struct flow_match_ipv6_addrs {
40 struct flow_dissector_key_ipv6_addrs *key, *mask;
41 };
42
43 struct flow_match_ip {
44 struct flow_dissector_key_ip *key, *mask;
45 };
46
47 struct flow_match_ports {
48 struct flow_dissector_key_ports *key, *mask;
49 };
50
51 struct flow_match_icmp {
52 struct flow_dissector_key_icmp *key, *mask;
53 };
54
55 struct flow_match_tcp {
56 struct flow_dissector_key_tcp *key, *mask;
57 };
58
59 struct flow_match_mpls {
60 struct flow_dissector_key_mpls *key, *mask;
61 };
62
63 struct flow_match_enc_keyid {
64 struct flow_dissector_key_keyid *key, *mask;
65 };
66
67 struct flow_match_enc_opts {
68 struct flow_dissector_key_enc_opts *key, *mask;
69 };
70
71 struct flow_rule;
72
73 void flow_rule_match_meta(const struct flow_rule *rule,
74 struct flow_match_meta *out);
75 void flow_rule_match_basic(const struct flow_rule *rule,
76 struct flow_match_basic *out);
77 void flow_rule_match_control(const struct flow_rule *rule,
78 struct flow_match_control *out);
79 void flow_rule_match_eth_addrs(const struct flow_rule *rule,
80 struct flow_match_eth_addrs *out);
81 void flow_rule_match_vlan(const struct flow_rule *rule,
82 struct flow_match_vlan *out);
83 void flow_rule_match_cvlan(const struct flow_rule *rule,
84 struct flow_match_vlan *out);
85 void flow_rule_match_ipv4_addrs(const struct flow_rule *rule,
86 struct flow_match_ipv4_addrs *out);
87 void flow_rule_match_ipv6_addrs(const struct flow_rule *rule,
88 struct flow_match_ipv6_addrs *out);
89 void flow_rule_match_ip(const struct flow_rule *rule,
90 struct flow_match_ip *out);
91 void flow_rule_match_ports(const struct flow_rule *rule,
92 struct flow_match_ports *out);
93 void flow_rule_match_tcp(const struct flow_rule *rule,
94 struct flow_match_tcp *out);
95 void flow_rule_match_icmp(const struct flow_rule *rule,
96 struct flow_match_icmp *out);
97 void flow_rule_match_mpls(const struct flow_rule *rule,
98 struct flow_match_mpls *out);
99 void flow_rule_match_enc_control(const struct flow_rule *rule,
100 struct flow_match_control *out);
101 void flow_rule_match_enc_ipv4_addrs(const struct flow_rule *rule,
102 struct flow_match_ipv4_addrs *out);
103 void flow_rule_match_enc_ipv6_addrs(const struct flow_rule *rule,
104 struct flow_match_ipv6_addrs *out);
105 void flow_rule_match_enc_ip(const struct flow_rule *rule,
106 struct flow_match_ip *out);
107 void flow_rule_match_enc_ports(const struct flow_rule *rule,
108 struct flow_match_ports *out);
109 void flow_rule_match_enc_keyid(const struct flow_rule *rule,
110 struct flow_match_enc_keyid *out);
111 void flow_rule_match_enc_opts(const struct flow_rule *rule,
112 struct flow_match_enc_opts *out);
113
114 enum flow_action_id {
115 FLOW_ACTION_ACCEPT = 0,
116 FLOW_ACTION_DROP,
117 FLOW_ACTION_TRAP,
118 FLOW_ACTION_GOTO,
119 FLOW_ACTION_REDIRECT,
120 FLOW_ACTION_MIRRED,
121 FLOW_ACTION_REDIRECT_INGRESS,
122 FLOW_ACTION_MIRRED_INGRESS,
123 FLOW_ACTION_VLAN_PUSH,
124 FLOW_ACTION_VLAN_POP,
125 FLOW_ACTION_VLAN_MANGLE,
126 FLOW_ACTION_TUNNEL_ENCAP,
127 FLOW_ACTION_TUNNEL_DECAP,
128 FLOW_ACTION_MANGLE,
129 FLOW_ACTION_ADD,
130 FLOW_ACTION_CSUM,
131 FLOW_ACTION_MARK,
132 FLOW_ACTION_PTYPE,
133 FLOW_ACTION_WAKE,
134 FLOW_ACTION_QUEUE,
135 FLOW_ACTION_SAMPLE,
136 FLOW_ACTION_POLICE,
137 FLOW_ACTION_CT,
138 FLOW_ACTION_MPLS_PUSH,
139 FLOW_ACTION_MPLS_POP,
140 FLOW_ACTION_MPLS_MANGLE,
141 NUM_FLOW_ACTIONS,
142 };
143
144 /* This is mirroring enum pedit_header_type definition for easy mapping between
145 * tc pedit action. Legacy TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK is mapped to
146 * FLOW_ACT_MANGLE_UNSPEC, which is supported by no driver.
147 */
148 enum flow_action_mangle_base {
149 FLOW_ACT_MANGLE_UNSPEC = 0,
150 FLOW_ACT_MANGLE_HDR_TYPE_ETH,
151 FLOW_ACT_MANGLE_HDR_TYPE_IP4,
152 FLOW_ACT_MANGLE_HDR_TYPE_IP6,
153 FLOW_ACT_MANGLE_HDR_TYPE_TCP,
154 FLOW_ACT_MANGLE_HDR_TYPE_UDP,
155 };
156
157 typedef void (*action_destr)(void *priv);
158
159 struct flow_action_entry {
160 enum flow_action_id id;
161 action_destr destructor;
162 void *destructor_priv;
163 union {
164 u32 chain_index; /* FLOW_ACTION_GOTO */
165 struct net_device *dev; /* FLOW_ACTION_REDIRECT */
166 struct { /* FLOW_ACTION_VLAN */
167 u16 vid;
168 __be16 proto;
169 u8 prio;
170 } vlan;
171 struct { /* FLOW_ACTION_PACKET_EDIT */
172 enum flow_action_mangle_base htype;
173 u32 offset;
174 u32 mask;
175 u32 val;
176 } mangle;
177 struct ip_tunnel_info *tunnel; /* FLOW_ACTION_TUNNEL_ENCAP */
178 u32 csum_flags; /* FLOW_ACTION_CSUM */
179 u32 mark; /* FLOW_ACTION_MARK */
180 u16 ptype; /* FLOW_ACTION_PTYPE */
181 struct { /* FLOW_ACTION_QUEUE */
182 u32 ctx;
183 u32 index;
184 u8 vf;
185 } queue;
186 struct { /* FLOW_ACTION_SAMPLE */
187 struct psample_group *psample_group;
188 u32 rate;
189 u32 trunc_size;
190 bool truncate;
191 } sample;
192 struct { /* FLOW_ACTION_POLICE */
193 s64 burst;
194 u64 rate_bytes_ps;
195 } police;
196 struct { /* FLOW_ACTION_CT */
197 int action;
198 u16 zone;
199 } ct;
200 struct { /* FLOW_ACTION_MPLS_PUSH */
201 u32 label;
202 __be16 proto;
203 u8 tc;
204 u8 bos;
205 u8 ttl;
206 } mpls_push;
207 struct { /* FLOW_ACTION_MPLS_POP */
208 __be16 proto;
209 } mpls_pop;
210 struct { /* FLOW_ACTION_MPLS_MANGLE */
211 u32 label;
212 u8 tc;
213 u8 bos;
214 u8 ttl;
215 } mpls_mangle;
216 };
217 };
218
219 struct flow_action {
220 unsigned int num_entries;
221 struct flow_action_entry entries[0];
222 };
223
flow_action_has_entries(const struct flow_action * action)224 static inline bool flow_action_has_entries(const struct flow_action *action)
225 {
226 return action->num_entries;
227 }
228
229 /**
230 * flow_action_has_one_action() - check if exactly one action is present
231 * @action: tc filter flow offload action
232 *
233 * Returns true if exactly one action is present.
234 */
flow_offload_has_one_action(const struct flow_action * action)235 static inline bool flow_offload_has_one_action(const struct flow_action *action)
236 {
237 return action->num_entries == 1;
238 }
239
240 #define flow_action_for_each(__i, __act, __actions) \
241 for (__i = 0, __act = &(__actions)->entries[0]; __i < (__actions)->num_entries; __act = &(__actions)->entries[++__i])
242
243 struct flow_rule {
244 struct flow_match match;
245 struct flow_action action;
246 };
247
248 struct flow_rule *flow_rule_alloc(unsigned int num_actions);
249
flow_rule_match_key(const struct flow_rule * rule,enum flow_dissector_key_id key)250 static inline bool flow_rule_match_key(const struct flow_rule *rule,
251 enum flow_dissector_key_id key)
252 {
253 return dissector_uses_key(rule->match.dissector, key);
254 }
255
256 struct flow_stats {
257 u64 pkts;
258 u64 bytes;
259 u64 lastused;
260 };
261
flow_stats_update(struct flow_stats * flow_stats,u64 bytes,u64 pkts,u64 lastused)262 static inline void flow_stats_update(struct flow_stats *flow_stats,
263 u64 bytes, u64 pkts, u64 lastused)
264 {
265 flow_stats->pkts += pkts;
266 flow_stats->bytes += bytes;
267 flow_stats->lastused = max_t(u64, flow_stats->lastused, lastused);
268 }
269
270 enum flow_block_command {
271 FLOW_BLOCK_BIND,
272 FLOW_BLOCK_UNBIND,
273 };
274
275 enum flow_block_binder_type {
276 FLOW_BLOCK_BINDER_TYPE_UNSPEC,
277 FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS,
278 FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS,
279 };
280
281 struct flow_block {
282 struct list_head cb_list;
283 };
284
285 struct netlink_ext_ack;
286
287 struct flow_block_offload {
288 enum flow_block_command command;
289 enum flow_block_binder_type binder_type;
290 bool block_shared;
291 bool unlocked_driver_cb;
292 struct net *net;
293 struct flow_block *block;
294 struct list_head cb_list;
295 struct list_head *driver_block_list;
296 struct netlink_ext_ack *extack;
297 };
298
299 enum tc_setup_type;
300 typedef int flow_setup_cb_t(enum tc_setup_type type, void *type_data,
301 void *cb_priv);
302
303 struct flow_block_cb {
304 struct list_head driver_list;
305 struct list_head list;
306 flow_setup_cb_t *cb;
307 void *cb_ident;
308 void *cb_priv;
309 void (*release)(void *cb_priv);
310 unsigned int refcnt;
311 };
312
313 struct flow_block_cb *flow_block_cb_alloc(flow_setup_cb_t *cb,
314 void *cb_ident, void *cb_priv,
315 void (*release)(void *cb_priv));
316 void flow_block_cb_free(struct flow_block_cb *block_cb);
317
318 struct flow_block_cb *flow_block_cb_lookup(struct flow_block *block,
319 flow_setup_cb_t *cb, void *cb_ident);
320
321 void *flow_block_cb_priv(struct flow_block_cb *block_cb);
322 void flow_block_cb_incref(struct flow_block_cb *block_cb);
323 unsigned int flow_block_cb_decref(struct flow_block_cb *block_cb);
324
flow_block_cb_add(struct flow_block_cb * block_cb,struct flow_block_offload * offload)325 static inline void flow_block_cb_add(struct flow_block_cb *block_cb,
326 struct flow_block_offload *offload)
327 {
328 list_add_tail(&block_cb->list, &offload->cb_list);
329 }
330
flow_block_cb_remove(struct flow_block_cb * block_cb,struct flow_block_offload * offload)331 static inline void flow_block_cb_remove(struct flow_block_cb *block_cb,
332 struct flow_block_offload *offload)
333 {
334 list_move(&block_cb->list, &offload->cb_list);
335 }
336
337 bool flow_block_cb_is_busy(flow_setup_cb_t *cb, void *cb_ident,
338 struct list_head *driver_block_list);
339
340 int flow_block_cb_setup_simple(struct flow_block_offload *f,
341 struct list_head *driver_list,
342 flow_setup_cb_t *cb,
343 void *cb_ident, void *cb_priv, bool ingress_only);
344
345 enum flow_cls_command {
346 FLOW_CLS_REPLACE,
347 FLOW_CLS_DESTROY,
348 FLOW_CLS_STATS,
349 FLOW_CLS_TMPLT_CREATE,
350 FLOW_CLS_TMPLT_DESTROY,
351 };
352
353 struct flow_cls_common_offload {
354 u32 chain_index;
355 __be16 protocol;
356 u32 prio;
357 struct netlink_ext_ack *extack;
358 };
359
360 struct flow_cls_offload {
361 struct flow_cls_common_offload common;
362 enum flow_cls_command command;
363 unsigned long cookie;
364 struct flow_rule *rule;
365 struct flow_stats stats;
366 u32 classid;
367 };
368
369 static inline struct flow_rule *
flow_cls_offload_flow_rule(struct flow_cls_offload * flow_cmd)370 flow_cls_offload_flow_rule(struct flow_cls_offload *flow_cmd)
371 {
372 return flow_cmd->rule;
373 }
374
flow_block_init(struct flow_block * flow_block)375 static inline void flow_block_init(struct flow_block *flow_block)
376 {
377 INIT_LIST_HEAD(&flow_block->cb_list);
378 }
379
380 typedef int flow_indr_block_bind_cb_t(struct net_device *dev, void *cb_priv,
381 enum tc_setup_type type, void *type_data);
382
383 typedef void flow_indr_block_ing_cmd_t(struct net_device *dev,
384 flow_indr_block_bind_cb_t *cb,
385 void *cb_priv,
386 enum flow_block_command command);
387
388 struct flow_indr_block_ing_entry {
389 flow_indr_block_ing_cmd_t *cb;
390 struct list_head list;
391 };
392
393 void flow_indr_add_block_ing_cb(struct flow_indr_block_ing_entry *entry);
394
395 void flow_indr_del_block_ing_cb(struct flow_indr_block_ing_entry *entry);
396
397 int __flow_indr_block_cb_register(struct net_device *dev, void *cb_priv,
398 flow_indr_block_bind_cb_t *cb,
399 void *cb_ident);
400
401 void __flow_indr_block_cb_unregister(struct net_device *dev,
402 flow_indr_block_bind_cb_t *cb,
403 void *cb_ident);
404
405 int flow_indr_block_cb_register(struct net_device *dev, void *cb_priv,
406 flow_indr_block_bind_cb_t *cb, void *cb_ident);
407
408 void flow_indr_block_cb_unregister(struct net_device *dev,
409 flow_indr_block_bind_cb_t *cb,
410 void *cb_ident);
411
412 void flow_indr_block_call(struct net_device *dev,
413 struct flow_block_offload *bo,
414 enum flow_block_command command);
415
416 #endif /* _NET_FLOW_OFFLOAD_H */
417
