1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2 /* Copyright (c) 2017-2018 Mellanox Technologies. All rights reserved */
3
4 #include <linux/kernel.h>
5 #include <linux/errno.h>
6 #include <linux/netdevice.h>
7 #include <linux/log2.h>
8 #include <net/net_namespace.h>
9 #include <net/flow_dissector.h>
10 #include <net/pkt_cls.h>
11 #include <net/tc_act/tc_gact.h>
12 #include <net/tc_act/tc_mirred.h>
13 #include <net/tc_act/tc_vlan.h>
14
15 #include "spectrum.h"
16 #include "core_acl_flex_keys.h"
17
mlxsw_sp_policer_validate(const struct flow_action * action,const struct flow_action_entry * act,struct netlink_ext_ack * extack)18 static int mlxsw_sp_policer_validate(const struct flow_action *action,
19 const struct flow_action_entry *act,
20 struct netlink_ext_ack *extack)
21 {
22 if (act->police.exceed.act_id != FLOW_ACTION_DROP) {
23 NL_SET_ERR_MSG_MOD(extack,
24 "Offload not supported when exceed action is not drop");
25 return -EOPNOTSUPP;
26 }
27
28 if (act->police.notexceed.act_id != FLOW_ACTION_PIPE &&
29 act->police.notexceed.act_id != FLOW_ACTION_ACCEPT) {
30 NL_SET_ERR_MSG_MOD(extack,
31 "Offload not supported when conform action is not pipe or ok");
32 return -EOPNOTSUPP;
33 }
34
35 if (act->police.notexceed.act_id == FLOW_ACTION_ACCEPT &&
36 !flow_action_is_last_entry(action, act)) {
37 NL_SET_ERR_MSG_MOD(extack,
38 "Offload not supported when conform action is ok, but action is not last");
39 return -EOPNOTSUPP;
40 }
41
42 if (act->police.peakrate_bytes_ps ||
43 act->police.avrate || act->police.overhead) {
44 NL_SET_ERR_MSG_MOD(extack,
45 "Offload not supported when peakrate/avrate/overhead is configured");
46 return -EOPNOTSUPP;
47 }
48
49 if (act->police.rate_pkt_ps) {
50 NL_SET_ERR_MSG_MOD(extack,
51 "QoS offload not support packets per second");
52 return -EOPNOTSUPP;
53 }
54
55 return 0;
56 }
57
mlxsw_sp_flower_parse_actions(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_flow_block * block,struct mlxsw_sp_acl_rule_info * rulei,struct flow_action * flow_action,struct netlink_ext_ack * extack)58 static int mlxsw_sp_flower_parse_actions(struct mlxsw_sp *mlxsw_sp,
59 struct mlxsw_sp_flow_block *block,
60 struct mlxsw_sp_acl_rule_info *rulei,
61 struct flow_action *flow_action,
62 struct netlink_ext_ack *extack)
63 {
64 const struct flow_action_entry *act;
65 int mirror_act_count = 0;
66 int police_act_count = 0;
67 int sample_act_count = 0;
68 int err, i;
69
70 if (!flow_action_has_entries(flow_action))
71 return 0;
72 if (!flow_action_mixed_hw_stats_check(flow_action, extack))
73 return -EOPNOTSUPP;
74
75 act = flow_action_first_entry_get(flow_action);
76 if (act->hw_stats & FLOW_ACTION_HW_STATS_DISABLED) {
77 /* Nothing to do */
78 } else if (act->hw_stats & FLOW_ACTION_HW_STATS_IMMEDIATE) {
79 /* Count action is inserted first */
80 err = mlxsw_sp_acl_rulei_act_count(mlxsw_sp, rulei, extack);
81 if (err)
82 return err;
83 } else {
84 NL_SET_ERR_MSG_MOD(extack, "Unsupported action HW stats type");
85 return -EOPNOTSUPP;
86 }
87
88 flow_action_for_each(i, act, flow_action) {
89 switch (act->id) {
90 case FLOW_ACTION_ACCEPT:
91 err = mlxsw_sp_acl_rulei_act_terminate(rulei);
92 if (err) {
93 NL_SET_ERR_MSG_MOD(extack, "Cannot append terminate action");
94 return err;
95 }
96 break;
97 case FLOW_ACTION_DROP: {
98 bool ingress;
99
100 if (mlxsw_sp_flow_block_is_mixed_bound(block)) {
101 NL_SET_ERR_MSG_MOD(extack, "Drop action is not supported when block is bound to ingress and egress");
102 return -EOPNOTSUPP;
103 }
104 ingress = mlxsw_sp_flow_block_is_ingress_bound(block);
105 err = mlxsw_sp_acl_rulei_act_drop(rulei, ingress,
106 act->user_cookie, extack);
107 if (err) {
108 NL_SET_ERR_MSG_MOD(extack, "Cannot append drop action");
109 return err;
110 }
111
112 /* Forbid block with this rulei to be bound
113 * to ingress/egress in future. Ingress rule is
114 * a blocker for egress and vice versa.
115 */
116 if (ingress)
117 rulei->egress_bind_blocker = 1;
118 else
119 rulei->ingress_bind_blocker = 1;
120 }
121 break;
122 case FLOW_ACTION_TRAP:
123 err = mlxsw_sp_acl_rulei_act_trap(rulei);
124 if (err) {
125 NL_SET_ERR_MSG_MOD(extack, "Cannot append trap action");
126 return err;
127 }
128 break;
129 case FLOW_ACTION_GOTO: {
130 u32 chain_index = act->chain_index;
131 struct mlxsw_sp_acl_ruleset *ruleset;
132 u16 group_id;
133
134 ruleset = mlxsw_sp_acl_ruleset_lookup(mlxsw_sp, block,
135 chain_index,
136 MLXSW_SP_ACL_PROFILE_FLOWER);
137 if (IS_ERR(ruleset))
138 return PTR_ERR(ruleset);
139
140 group_id = mlxsw_sp_acl_ruleset_group_id(ruleset);
141 err = mlxsw_sp_acl_rulei_act_jump(rulei, group_id);
142 if (err) {
143 NL_SET_ERR_MSG_MOD(extack, "Cannot append jump action");
144 return err;
145 }
146 }
147 break;
148 case FLOW_ACTION_REDIRECT: {
149 struct net_device *out_dev;
150 struct mlxsw_sp_fid *fid;
151 u16 fid_index;
152
153 if (mlxsw_sp_flow_block_is_egress_bound(block)) {
154 NL_SET_ERR_MSG_MOD(extack, "Redirect action is not supported on egress");
155 return -EOPNOTSUPP;
156 }
157
158 /* Forbid block with this rulei to be bound
159 * to egress in future.
160 */
161 rulei->egress_bind_blocker = 1;
162
163 /* Ignore learning and security lookup as redirection
164 * using ingress filters happens before the bridge.
165 */
166 err = mlxsw_sp_acl_rulei_act_ignore(mlxsw_sp, rulei,
167 true, true);
168 if (err) {
169 NL_SET_ERR_MSG_MOD(extack, "Cannot append ignore action");
170 return err;
171 }
172
173 fid = mlxsw_sp_acl_dummy_fid(mlxsw_sp);
174 fid_index = mlxsw_sp_fid_index(fid);
175 err = mlxsw_sp_acl_rulei_act_fid_set(mlxsw_sp, rulei,
176 fid_index, extack);
177 if (err)
178 return err;
179
180 out_dev = act->dev;
181 err = mlxsw_sp_acl_rulei_act_fwd(mlxsw_sp, rulei,
182 out_dev, extack);
183 if (err)
184 return err;
185 }
186 break;
187 case FLOW_ACTION_MIRRED: {
188 struct net_device *out_dev = act->dev;
189
190 if (mirror_act_count++) {
191 NL_SET_ERR_MSG_MOD(extack, "Multiple mirror actions per rule are not supported");
192 return -EOPNOTSUPP;
193 }
194
195 err = mlxsw_sp_acl_rulei_act_mirror(mlxsw_sp, rulei,
196 block, out_dev,
197 extack);
198 if (err)
199 return err;
200 }
201 break;
202 case FLOW_ACTION_VLAN_MANGLE: {
203 u16 proto = be16_to_cpu(act->vlan.proto);
204 u8 prio = act->vlan.prio;
205 u16 vid = act->vlan.vid;
206
207 err = mlxsw_sp_acl_rulei_act_vlan(mlxsw_sp, rulei,
208 act->id, vid,
209 proto, prio, extack);
210 if (err)
211 return err;
212 break;
213 }
214 case FLOW_ACTION_PRIORITY:
215 err = mlxsw_sp_acl_rulei_act_priority(mlxsw_sp, rulei,
216 act->priority,
217 extack);
218 if (err)
219 return err;
220 break;
221 case FLOW_ACTION_MANGLE: {
222 enum flow_action_mangle_base htype = act->mangle.htype;
223 __be32 be_mask = (__force __be32) act->mangle.mask;
224 __be32 be_val = (__force __be32) act->mangle.val;
225 u32 offset = act->mangle.offset;
226 u32 mask = be32_to_cpu(be_mask);
227 u32 val = be32_to_cpu(be_val);
228
229 err = mlxsw_sp_acl_rulei_act_mangle(mlxsw_sp, rulei,
230 htype, offset,
231 mask, val, extack);
232 if (err)
233 return err;
234 break;
235 }
236 case FLOW_ACTION_POLICE: {
237 u32 burst;
238
239 if (police_act_count++) {
240 NL_SET_ERR_MSG_MOD(extack, "Multiple police actions per rule are not supported");
241 return -EOPNOTSUPP;
242 }
243
244 err = mlxsw_sp_policer_validate(flow_action, act, extack);
245 if (err)
246 return err;
247
248 /* The kernel might adjust the requested burst size so
249 * that it is not exactly a power of two. Re-adjust it
250 * here since the hardware only supports burst sizes
251 * that are a power of two.
252 */
253 burst = roundup_pow_of_two(act->police.burst);
254 err = mlxsw_sp_acl_rulei_act_police(mlxsw_sp, rulei,
255 act->hw_index,
256 act->police.rate_bytes_ps,
257 burst, extack);
258 if (err)
259 return err;
260 break;
261 }
262 case FLOW_ACTION_SAMPLE: {
263 if (sample_act_count++) {
264 NL_SET_ERR_MSG_MOD(extack, "Multiple sample actions per rule are not supported");
265 return -EOPNOTSUPP;
266 }
267
268 err = mlxsw_sp_acl_rulei_act_sample(mlxsw_sp, rulei,
269 block,
270 act->sample.psample_group,
271 act->sample.rate,
272 act->sample.trunc_size,
273 act->sample.truncate,
274 extack);
275 if (err)
276 return err;
277 break;
278 }
279 default:
280 NL_SET_ERR_MSG_MOD(extack, "Unsupported action");
281 dev_err(mlxsw_sp->bus_info->dev, "Unsupported action\n");
282 return -EOPNOTSUPP;
283 }
284 }
285
286 if (rulei->ipv6_valid) {
287 NL_SET_ERR_MSG_MOD(extack, "Unsupported mangle field");
288 return -EOPNOTSUPP;
289 }
290
291 return 0;
292 }
293
294 static int
mlxsw_sp_flower_parse_meta_iif(struct mlxsw_sp_acl_rule_info * rulei,const struct mlxsw_sp_flow_block * block,const struct flow_match_meta * match,struct netlink_ext_ack * extack)295 mlxsw_sp_flower_parse_meta_iif(struct mlxsw_sp_acl_rule_info *rulei,
296 const struct mlxsw_sp_flow_block *block,
297 const struct flow_match_meta *match,
298 struct netlink_ext_ack *extack)
299 {
300 struct mlxsw_sp_port *mlxsw_sp_port;
301 struct net_device *ingress_dev;
302
303 if (!match->mask->ingress_ifindex)
304 return 0;
305
306 if (match->mask->ingress_ifindex != 0xFFFFFFFF) {
307 NL_SET_ERR_MSG_MOD(extack, "Unsupported ingress ifindex mask");
308 return -EINVAL;
309 }
310
311 ingress_dev = __dev_get_by_index(block->net,
312 match->key->ingress_ifindex);
313 if (!ingress_dev) {
314 NL_SET_ERR_MSG_MOD(extack, "Can't find specified ingress port to match on");
315 return -EINVAL;
316 }
317
318 if (!mlxsw_sp_port_dev_check(ingress_dev)) {
319 NL_SET_ERR_MSG_MOD(extack, "Can't match on non-mlxsw ingress port");
320 return -EINVAL;
321 }
322
323 mlxsw_sp_port = netdev_priv(ingress_dev);
324 if (mlxsw_sp_port->mlxsw_sp != block->mlxsw_sp) {
325 NL_SET_ERR_MSG_MOD(extack, "Can't match on a port from different device");
326 return -EINVAL;
327 }
328
329 mlxsw_sp_acl_rulei_keymask_u32(rulei,
330 MLXSW_AFK_ELEMENT_SRC_SYS_PORT,
331 mlxsw_sp_port->local_port,
332 0xFFFFFFFF);
333
334 return 0;
335 }
336
mlxsw_sp_flower_parse_meta(struct mlxsw_sp_acl_rule_info * rulei,struct flow_cls_offload * f,struct mlxsw_sp_flow_block * block)337 static int mlxsw_sp_flower_parse_meta(struct mlxsw_sp_acl_rule_info *rulei,
338 struct flow_cls_offload *f,
339 struct mlxsw_sp_flow_block *block)
340 {
341 struct flow_rule *rule = flow_cls_offload_flow_rule(f);
342 struct flow_match_meta match;
343
344 if (!flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_META))
345 return 0;
346
347 flow_rule_match_meta(rule, &match);
348
349 mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_FDB_MISS,
350 match.key->l2_miss, match.mask->l2_miss);
351
352 return mlxsw_sp_flower_parse_meta_iif(rulei, block, &match,
353 f->common.extack);
354 }
355
mlxsw_sp_flower_parse_ipv4(struct mlxsw_sp_acl_rule_info * rulei,struct flow_cls_offload * f)356 static void mlxsw_sp_flower_parse_ipv4(struct mlxsw_sp_acl_rule_info *rulei,
357 struct flow_cls_offload *f)
358 {
359 struct flow_match_ipv4_addrs match;
360
361 flow_rule_match_ipv4_addrs(f->rule, &match);
362
363 mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_SRC_IP_0_31,
364 (char *) &match.key->src,
365 (char *) &match.mask->src, 4);
366 mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_DST_IP_0_31,
367 (char *) &match.key->dst,
368 (char *) &match.mask->dst, 4);
369 }
370
mlxsw_sp_flower_parse_ipv6(struct mlxsw_sp_acl_rule_info * rulei,struct flow_cls_offload * f)371 static void mlxsw_sp_flower_parse_ipv6(struct mlxsw_sp_acl_rule_info *rulei,
372 struct flow_cls_offload *f)
373 {
374 struct flow_match_ipv6_addrs match;
375
376 flow_rule_match_ipv6_addrs(f->rule, &match);
377
378 mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_SRC_IP_96_127,
379 &match.key->src.s6_addr[0x0],
380 &match.mask->src.s6_addr[0x0], 4);
381 mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_SRC_IP_64_95,
382 &match.key->src.s6_addr[0x4],
383 &match.mask->src.s6_addr[0x4], 4);
384 mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_SRC_IP_32_63,
385 &match.key->src.s6_addr[0x8],
386 &match.mask->src.s6_addr[0x8], 4);
387 mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_SRC_IP_0_31,
388 &match.key->src.s6_addr[0xC],
389 &match.mask->src.s6_addr[0xC], 4);
390 mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_DST_IP_96_127,
391 &match.key->dst.s6_addr[0x0],
392 &match.mask->dst.s6_addr[0x0], 4);
393 mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_DST_IP_64_95,
394 &match.key->dst.s6_addr[0x4],
395 &match.mask->dst.s6_addr[0x4], 4);
396 mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_DST_IP_32_63,
397 &match.key->dst.s6_addr[0x8],
398 &match.mask->dst.s6_addr[0x8], 4);
399 mlxsw_sp_acl_rulei_keymask_buf(rulei, MLXSW_AFK_ELEMENT_DST_IP_0_31,
400 &match.key->dst.s6_addr[0xC],
401 &match.mask->dst.s6_addr[0xC], 4);
402 }
403
mlxsw_sp_flower_parse_ports(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_rule_info * rulei,struct flow_cls_offload * f,u8 ip_proto)404 static int mlxsw_sp_flower_parse_ports(struct mlxsw_sp *mlxsw_sp,
405 struct mlxsw_sp_acl_rule_info *rulei,
406 struct flow_cls_offload *f,
407 u8 ip_proto)
408 {
409 const struct flow_rule *rule = flow_cls_offload_flow_rule(f);
410 struct flow_match_ports match;
411
412 if (!flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS))
413 return 0;
414
415 if (ip_proto != IPPROTO_TCP && ip_proto != IPPROTO_UDP) {
416 NL_SET_ERR_MSG_MOD(f->common.extack, "Only UDP and TCP keys are supported");
417 dev_err(mlxsw_sp->bus_info->dev, "Only UDP and TCP keys are supported\n");
418 return -EINVAL;
419 }
420
421 flow_rule_match_ports(rule, &match);
422 mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_DST_L4_PORT,
423 ntohs(match.key->dst),
424 ntohs(match.mask->dst));
425 mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_SRC_L4_PORT,
426 ntohs(match.key->src),
427 ntohs(match.mask->src));
428 return 0;
429 }
430
431 static int
mlxsw_sp_flower_parse_ports_range(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_rule_info * rulei,struct flow_cls_offload * f,u8 ip_proto)432 mlxsw_sp_flower_parse_ports_range(struct mlxsw_sp *mlxsw_sp,
433 struct mlxsw_sp_acl_rule_info *rulei,
434 struct flow_cls_offload *f, u8 ip_proto)
435 {
436 const struct flow_rule *rule = flow_cls_offload_flow_rule(f);
437 struct flow_match_ports_range match;
438 u32 key_mask_value = 0;
439
440 if (!flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_PORTS_RANGE))
441 return 0;
442
443 if (ip_proto != IPPROTO_TCP && ip_proto != IPPROTO_UDP) {
444 NL_SET_ERR_MSG_MOD(f->common.extack, "Only UDP and TCP keys are supported");
445 return -EINVAL;
446 }
447
448 flow_rule_match_ports_range(rule, &match);
449
450 if (match.mask->tp_min.src) {
451 struct mlxsw_sp_port_range range = {
452 .min = ntohs(match.key->tp_min.src),
453 .max = ntohs(match.key->tp_max.src),
454 .source = true,
455 };
456 u8 prr_index;
457 int err;
458
459 err = mlxsw_sp_port_range_reg_get(mlxsw_sp, &range,
460 f->common.extack, &prr_index);
461 if (err)
462 return err;
463
464 rulei->src_port_range_reg_index = prr_index;
465 rulei->src_port_range_reg_valid = true;
466 key_mask_value |= BIT(prr_index);
467 }
468
469 if (match.mask->tp_min.dst) {
470 struct mlxsw_sp_port_range range = {
471 .min = ntohs(match.key->tp_min.dst),
472 .max = ntohs(match.key->tp_max.dst),
473 };
474 u8 prr_index;
475 int err;
476
477 err = mlxsw_sp_port_range_reg_get(mlxsw_sp, &range,
478 f->common.extack, &prr_index);
479 if (err)
480 return err;
481
482 rulei->dst_port_range_reg_index = prr_index;
483 rulei->dst_port_range_reg_valid = true;
484 key_mask_value |= BIT(prr_index);
485 }
486
487 mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_L4_PORT_RANGE,
488 key_mask_value, key_mask_value);
489
490 return 0;
491 }
492
mlxsw_sp_flower_parse_tcp(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_rule_info * rulei,struct flow_cls_offload * f,u8 ip_proto)493 static int mlxsw_sp_flower_parse_tcp(struct mlxsw_sp *mlxsw_sp,
494 struct mlxsw_sp_acl_rule_info *rulei,
495 struct flow_cls_offload *f,
496 u8 ip_proto)
497 {
498 const struct flow_rule *rule = flow_cls_offload_flow_rule(f);
499 struct flow_match_tcp match;
500
501 if (!flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_TCP))
502 return 0;
503
504 if (ip_proto != IPPROTO_TCP) {
505 NL_SET_ERR_MSG_MOD(f->common.extack, "TCP keys supported only for TCP");
506 dev_err(mlxsw_sp->bus_info->dev, "TCP keys supported only for TCP\n");
507 return -EINVAL;
508 }
509
510 flow_rule_match_tcp(rule, &match);
511
512 if (match.mask->flags & htons(0x0E00)) {
513 NL_SET_ERR_MSG_MOD(f->common.extack, "TCP flags match not supported on reserved bits");
514 dev_err(mlxsw_sp->bus_info->dev, "TCP flags match not supported on reserved bits\n");
515 return -EINVAL;
516 }
517
518 mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_TCP_FLAGS,
519 ntohs(match.key->flags),
520 ntohs(match.mask->flags));
521 return 0;
522 }
523
mlxsw_sp_flower_parse_ip(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_acl_rule_info * rulei,struct flow_cls_offload * f,u16 n_proto)524 static int mlxsw_sp_flower_parse_ip(struct mlxsw_sp *mlxsw_sp,
525 struct mlxsw_sp_acl_rule_info *rulei,
526 struct flow_cls_offload *f,
527 u16 n_proto)
528 {
529 const struct flow_rule *rule = flow_cls_offload_flow_rule(f);
530 struct flow_match_ip match;
531
532 if (!flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_IP))
533 return 0;
534
535 if (n_proto != ETH_P_IP && n_proto != ETH_P_IPV6) {
536 NL_SET_ERR_MSG_MOD(f->common.extack, "IP keys supported only for IPv4/6");
537 dev_err(mlxsw_sp->bus_info->dev, "IP keys supported only for IPv4/6\n");
538 return -EINVAL;
539 }
540
541 flow_rule_match_ip(rule, &match);
542
543 mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_IP_TTL_,
544 match.key->ttl, match.mask->ttl);
545
546 mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_IP_ECN,
547 match.key->tos & 0x3,
548 match.mask->tos & 0x3);
549
550 mlxsw_sp_acl_rulei_keymask_u32(rulei, MLXSW_AFK_ELEMENT_IP_DSCP,
551 match.key->tos >> 2,
552 match.mask->tos >> 2);
553
554 return 0;
555 }
556
mlxsw_sp_flower_parse(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_flow_block * block,struct mlxsw_sp_acl_rule_info * rulei,struct flow_cls_offload * f)557 static int mlxsw_sp_flower_parse(struct mlxsw_sp *mlxsw_sp,
558 struct mlxsw_sp_flow_block *block,
559 struct mlxsw_sp_acl_rule_info *rulei,
560 struct flow_cls_offload *f)
561 {
562 struct flow_rule *rule = flow_cls_offload_flow_rule(f);
563 struct flow_dissector *dissector = rule->match.dissector;
564 u16 n_proto_mask = 0;
565 u16 n_proto_key = 0;
566 u16 addr_type = 0;
567 u8 ip_proto = 0;
568 int err;
569
570 if (dissector->used_keys &
571 ~(BIT_ULL(FLOW_DISSECTOR_KEY_META) |
572 BIT_ULL(FLOW_DISSECTOR_KEY_CONTROL) |
573 BIT_ULL(FLOW_DISSECTOR_KEY_BASIC) |
574 BIT_ULL(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
575 BIT_ULL(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
576 BIT_ULL(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
577 BIT_ULL(FLOW_DISSECTOR_KEY_PORTS) |
578 BIT_ULL(FLOW_DISSECTOR_KEY_PORTS_RANGE) |
579 BIT_ULL(FLOW_DISSECTOR_KEY_TCP) |
580 BIT_ULL(FLOW_DISSECTOR_KEY_IP) |
581 BIT_ULL(FLOW_DISSECTOR_KEY_VLAN))) {
582 dev_err(mlxsw_sp->bus_info->dev, "Unsupported key\n");
583 NL_SET_ERR_MSG_MOD(f->common.extack, "Unsupported key");
584 return -EOPNOTSUPP;
585 }
586
587 mlxsw_sp_acl_rulei_priority(rulei, f->common.prio);
588
589 err = mlxsw_sp_flower_parse_meta(rulei, f, block);
590 if (err)
591 return err;
592
593 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CONTROL)) {
594 struct flow_match_control match;
595
596 flow_rule_match_control(rule, &match);
597 addr_type = match.key->addr_type;
598
599 if (flow_rule_has_control_flags(match.mask->flags,
600 f->common.extack))
601 return -EOPNOTSUPP;
602 }
603
604 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_BASIC)) {
605 struct flow_match_basic match;
606
607 flow_rule_match_basic(rule, &match);
608 n_proto_key = ntohs(match.key->n_proto);
609 n_proto_mask = ntohs(match.mask->n_proto);
610
611 if (n_proto_key == ETH_P_ALL) {
612 n_proto_key = 0;
613 n_proto_mask = 0;
614 }
615 mlxsw_sp_acl_rulei_keymask_u32(rulei,
616 MLXSW_AFK_ELEMENT_ETHERTYPE,
617 n_proto_key, n_proto_mask);
618
619 ip_proto = match.key->ip_proto;
620 mlxsw_sp_acl_rulei_keymask_u32(rulei,
621 MLXSW_AFK_ELEMENT_IP_PROTO,
622 match.key->ip_proto,
623 match.mask->ip_proto);
624 }
625
626 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
627 struct flow_match_eth_addrs match;
628
629 flow_rule_match_eth_addrs(rule, &match);
630 mlxsw_sp_acl_rulei_keymask_buf(rulei,
631 MLXSW_AFK_ELEMENT_DMAC_32_47,
632 match.key->dst,
633 match.mask->dst, 2);
634 mlxsw_sp_acl_rulei_keymask_buf(rulei,
635 MLXSW_AFK_ELEMENT_DMAC_0_31,
636 match.key->dst + 2,
637 match.mask->dst + 2, 4);
638 mlxsw_sp_acl_rulei_keymask_buf(rulei,
639 MLXSW_AFK_ELEMENT_SMAC_32_47,
640 match.key->src,
641 match.mask->src, 2);
642 mlxsw_sp_acl_rulei_keymask_buf(rulei,
643 MLXSW_AFK_ELEMENT_SMAC_0_31,
644 match.key->src + 2,
645 match.mask->src + 2, 4);
646 }
647
648 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)) {
649 struct flow_match_vlan match;
650
651 flow_rule_match_vlan(rule, &match);
652 if (mlxsw_sp_flow_block_is_egress_bound(block) &&
653 match.mask->vlan_id) {
654 NL_SET_ERR_MSG_MOD(f->common.extack, "vlan_id key is not supported on egress");
655 return -EOPNOTSUPP;
656 }
657
658 /* Forbid block with this rulei to be bound
659 * to egress in future.
660 */
661 rulei->egress_bind_blocker = 1;
662
663 if (match.mask->vlan_id != 0)
664 mlxsw_sp_acl_rulei_keymask_u32(rulei,
665 MLXSW_AFK_ELEMENT_VID,
666 match.key->vlan_id,
667 match.mask->vlan_id);
668 if (match.mask->vlan_priority != 0)
669 mlxsw_sp_acl_rulei_keymask_u32(rulei,
670 MLXSW_AFK_ELEMENT_PCP,
671 match.key->vlan_priority,
672 match.mask->vlan_priority);
673 }
674
675 if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS)
676 mlxsw_sp_flower_parse_ipv4(rulei, f);
677
678 if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS)
679 mlxsw_sp_flower_parse_ipv6(rulei, f);
680
681 err = mlxsw_sp_flower_parse_ports(mlxsw_sp, rulei, f, ip_proto);
682 if (err)
683 return err;
684
685 err = mlxsw_sp_flower_parse_ports_range(mlxsw_sp, rulei, f, ip_proto);
686 if (err)
687 return err;
688
689 err = mlxsw_sp_flower_parse_tcp(mlxsw_sp, rulei, f, ip_proto);
690 if (err)
691 return err;
692
693 err = mlxsw_sp_flower_parse_ip(mlxsw_sp, rulei, f, n_proto_key & n_proto_mask);
694 if (err)
695 return err;
696
697 return mlxsw_sp_flower_parse_actions(mlxsw_sp, block, rulei,
698 &f->rule->action,
699 f->common.extack);
700 }
701
mlxsw_sp_flower_mall_prio_check(struct mlxsw_sp_flow_block * block,struct flow_cls_offload * f)702 static int mlxsw_sp_flower_mall_prio_check(struct mlxsw_sp_flow_block *block,
703 struct flow_cls_offload *f)
704 {
705 bool ingress = mlxsw_sp_flow_block_is_ingress_bound(block);
706 unsigned int mall_min_prio;
707 unsigned int mall_max_prio;
708 int err;
709
710 err = mlxsw_sp_mall_prio_get(block, f->common.chain_index,
711 &mall_min_prio, &mall_max_prio);
712 if (err) {
713 if (err == -ENOENT)
714 /* No matchall filters installed on this chain. */
715 return 0;
716 NL_SET_ERR_MSG(f->common.extack, "Failed to get matchall priorities");
717 return err;
718 }
719 if (ingress && f->common.prio <= mall_min_prio) {
720 NL_SET_ERR_MSG(f->common.extack, "Failed to add in front of existing matchall rules");
721 return -EOPNOTSUPP;
722 }
723 if (!ingress && f->common.prio >= mall_max_prio) {
724 NL_SET_ERR_MSG(f->common.extack, "Failed to add behind of existing matchall rules");
725 return -EOPNOTSUPP;
726 }
727 return 0;
728 }
729
mlxsw_sp_flower_replace(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_flow_block * block,struct flow_cls_offload * f)730 int mlxsw_sp_flower_replace(struct mlxsw_sp *mlxsw_sp,
731 struct mlxsw_sp_flow_block *block,
732 struct flow_cls_offload *f)
733 {
734 struct mlxsw_sp_acl_rule_info *rulei;
735 struct mlxsw_sp_acl_ruleset *ruleset;
736 struct mlxsw_sp_acl_rule *rule;
737 int err;
738
739 err = mlxsw_sp_flower_mall_prio_check(block, f);
740 if (err)
741 return err;
742
743 ruleset = mlxsw_sp_acl_ruleset_get(mlxsw_sp, block,
744 f->common.chain_index,
745 MLXSW_SP_ACL_PROFILE_FLOWER, NULL);
746 if (IS_ERR(ruleset))
747 return PTR_ERR(ruleset);
748
749 rule = mlxsw_sp_acl_rule_create(mlxsw_sp, ruleset, f->cookie, NULL,
750 f->common.extack);
751 if (IS_ERR(rule)) {
752 err = PTR_ERR(rule);
753 goto err_rule_create;
754 }
755
756 rulei = mlxsw_sp_acl_rule_rulei(rule);
757 err = mlxsw_sp_flower_parse(mlxsw_sp, block, rulei, f);
758 if (err)
759 goto err_flower_parse;
760
761 err = mlxsw_sp_acl_rulei_commit(rulei);
762 if (err)
763 goto err_rulei_commit;
764
765 err = mlxsw_sp_acl_rule_add(mlxsw_sp, rule);
766 if (err)
767 goto err_rule_add;
768
769 mlxsw_sp_acl_ruleset_put(mlxsw_sp, ruleset);
770 return 0;
771
772 err_rule_add:
773 err_rulei_commit:
774 err_flower_parse:
775 mlxsw_sp_acl_rule_destroy(mlxsw_sp, rule);
776 err_rule_create:
777 mlxsw_sp_acl_ruleset_put(mlxsw_sp, ruleset);
778 return err;
779 }
780
mlxsw_sp_flower_destroy(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_flow_block * block,struct flow_cls_offload * f)781 void mlxsw_sp_flower_destroy(struct mlxsw_sp *mlxsw_sp,
782 struct mlxsw_sp_flow_block *block,
783 struct flow_cls_offload *f)
784 {
785 struct mlxsw_sp_acl_ruleset *ruleset;
786 struct mlxsw_sp_acl_rule *rule;
787
788 ruleset = mlxsw_sp_acl_ruleset_get(mlxsw_sp, block,
789 f->common.chain_index,
790 MLXSW_SP_ACL_PROFILE_FLOWER, NULL);
791 if (IS_ERR(ruleset))
792 return;
793
794 rule = mlxsw_sp_acl_rule_lookup(mlxsw_sp, ruleset, f->cookie);
795 if (rule) {
796 mlxsw_sp_acl_rule_del(mlxsw_sp, rule);
797 mlxsw_sp_acl_rule_destroy(mlxsw_sp, rule);
798 }
799
800 mlxsw_sp_acl_ruleset_put(mlxsw_sp, ruleset);
801 }
802
mlxsw_sp_flower_stats(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_flow_block * block,struct flow_cls_offload * f)803 int mlxsw_sp_flower_stats(struct mlxsw_sp *mlxsw_sp,
804 struct mlxsw_sp_flow_block *block,
805 struct flow_cls_offload *f)
806 {
807 enum flow_action_hw_stats used_hw_stats = FLOW_ACTION_HW_STATS_DISABLED;
808 struct mlxsw_sp_acl_ruleset *ruleset;
809 struct mlxsw_sp_acl_rule *rule;
810 u64 packets;
811 u64 lastuse;
812 u64 bytes;
813 u64 drops;
814 int err;
815
816 ruleset = mlxsw_sp_acl_ruleset_get(mlxsw_sp, block,
817 f->common.chain_index,
818 MLXSW_SP_ACL_PROFILE_FLOWER, NULL);
819 if (WARN_ON(IS_ERR(ruleset)))
820 return -EINVAL;
821
822 rule = mlxsw_sp_acl_rule_lookup(mlxsw_sp, ruleset, f->cookie);
823 if (!rule)
824 return -EINVAL;
825
826 err = mlxsw_sp_acl_rule_get_stats(mlxsw_sp, rule, &packets, &bytes,
827 &drops, &lastuse, &used_hw_stats);
828 if (err)
829 goto err_rule_get_stats;
830
831 flow_stats_update(&f->stats, bytes, packets, drops, lastuse,
832 used_hw_stats);
833
834 mlxsw_sp_acl_ruleset_put(mlxsw_sp, ruleset);
835 return 0;
836
837 err_rule_get_stats:
838 mlxsw_sp_acl_ruleset_put(mlxsw_sp, ruleset);
839 return err;
840 }
841
mlxsw_sp_flower_tmplt_create(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_flow_block * block,struct flow_cls_offload * f)842 int mlxsw_sp_flower_tmplt_create(struct mlxsw_sp *mlxsw_sp,
843 struct mlxsw_sp_flow_block *block,
844 struct flow_cls_offload *f)
845 {
846 struct mlxsw_sp_acl_ruleset *ruleset;
847 struct mlxsw_sp_acl_rule_info rulei;
848 int err;
849
850 memset(&rulei, 0, sizeof(rulei));
851 err = mlxsw_sp_flower_parse(mlxsw_sp, block, &rulei, f);
852 if (err)
853 return err;
854 ruleset = mlxsw_sp_acl_ruleset_get(mlxsw_sp, block,
855 f->common.chain_index,
856 MLXSW_SP_ACL_PROFILE_FLOWER,
857 &rulei.values.elusage);
858
859 /* keep the reference to the ruleset */
860 return PTR_ERR_OR_ZERO(ruleset);
861 }
862
mlxsw_sp_flower_tmplt_destroy(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_flow_block * block,struct flow_cls_offload * f)863 void mlxsw_sp_flower_tmplt_destroy(struct mlxsw_sp *mlxsw_sp,
864 struct mlxsw_sp_flow_block *block,
865 struct flow_cls_offload *f)
866 {
867 struct mlxsw_sp_acl_ruleset *ruleset;
868
869 ruleset = mlxsw_sp_acl_ruleset_get(mlxsw_sp, block,
870 f->common.chain_index,
871 MLXSW_SP_ACL_PROFILE_FLOWER, NULL);
872 if (IS_ERR(ruleset))
873 return;
874 /* put the reference to the ruleset kept in create */
875 mlxsw_sp_acl_ruleset_put(mlxsw_sp, ruleset);
876 mlxsw_sp_acl_ruleset_put(mlxsw_sp, ruleset);
877 }
878
mlxsw_sp_flower_prio_get(struct mlxsw_sp * mlxsw_sp,struct mlxsw_sp_flow_block * block,u32 chain_index,unsigned int * p_min_prio,unsigned int * p_max_prio)879 int mlxsw_sp_flower_prio_get(struct mlxsw_sp *mlxsw_sp,
880 struct mlxsw_sp_flow_block *block,
881 u32 chain_index, unsigned int *p_min_prio,
882 unsigned int *p_max_prio)
883 {
884 struct mlxsw_sp_acl_ruleset *ruleset;
885
886 ruleset = mlxsw_sp_acl_ruleset_lookup(mlxsw_sp, block,
887 chain_index,
888 MLXSW_SP_ACL_PROFILE_FLOWER);
889 if (IS_ERR(ruleset))
890 /* In case there are no flower rules, the caller
891 * receives -ENOENT to indicate there is no need
892 * to check the priorities.
893 */
894 return PTR_ERR(ruleset);
895 mlxsw_sp_acl_ruleset_prio_get(ruleset, p_min_prio, p_max_prio);
896 return 0;
897 }
898