1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 /* Copyright (C) 2021 Corigine, Inc. */
3
4 #include <net/tc_act/tc_csum.h>
5 #include <net/tc_act/tc_ct.h>
6
7 #include "conntrack.h"
8 #include "../nfp_port.h"
9
10 const struct rhashtable_params nfp_tc_ct_merge_params = {
11 .head_offset = offsetof(struct nfp_fl_ct_tc_merge,
12 hash_node),
13 .key_len = sizeof(unsigned long) * 2,
14 .key_offset = offsetof(struct nfp_fl_ct_tc_merge, cookie),
15 .automatic_shrinking = true,
16 };
17
18 const struct rhashtable_params nfp_nft_ct_merge_params = {
19 .head_offset = offsetof(struct nfp_fl_nft_tc_merge,
20 hash_node),
21 .key_len = sizeof(unsigned long) * 3,
22 .key_offset = offsetof(struct nfp_fl_nft_tc_merge, cookie),
23 .automatic_shrinking = true,
24 };
25
26 static struct flow_action_entry *get_flow_act(struct flow_rule *rule,
27 enum flow_action_id act_id);
28
29 /**
30 * get_hashentry() - Wrapper around hashtable lookup.
31 * @ht: hashtable where entry could be found
32 * @key: key to lookup
33 * @params: hashtable params
34 * @size: size of entry to allocate if not in table
35 *
36 * Returns an entry from a hashtable. If entry does not exist
37 * yet allocate the memory for it and return the new entry.
38 */
get_hashentry(struct rhashtable * ht,void * key,const struct rhashtable_params params,size_t size)39 static void *get_hashentry(struct rhashtable *ht, void *key,
40 const struct rhashtable_params params, size_t size)
41 {
42 void *result;
43
44 result = rhashtable_lookup_fast(ht, key, params);
45
46 if (result)
47 return result;
48
49 result = kzalloc(size, GFP_KERNEL);
50 if (!result)
51 return ERR_PTR(-ENOMEM);
52
53 return result;
54 }
55
is_pre_ct_flow(struct flow_cls_offload * flow)56 bool is_pre_ct_flow(struct flow_cls_offload *flow)
57 {
58 struct flow_rule *rule = flow_cls_offload_flow_rule(flow);
59 struct flow_dissector *dissector = rule->match.dissector;
60 struct flow_action_entry *act;
61 struct flow_match_ct ct;
62 int i;
63
64 if (dissector->used_keys & BIT_ULL(FLOW_DISSECTOR_KEY_CT)) {
65 flow_rule_match_ct(rule, &ct);
66 if (ct.key->ct_state)
67 return false;
68 }
69
70 if (flow->common.chain_index)
71 return false;
72
73 flow_action_for_each(i, act, &flow->rule->action) {
74 if (act->id == FLOW_ACTION_CT) {
75 /* The pre_ct rule only have the ct or ct nat action, cannot
76 * contains other ct action e.g ct commit and so on.
77 */
78 if ((!act->ct.action || act->ct.action == TCA_CT_ACT_NAT))
79 return true;
80 else
81 return false;
82 }
83 }
84
85 return false;
86 }
87
is_post_ct_flow(struct flow_cls_offload * flow)88 bool is_post_ct_flow(struct flow_cls_offload *flow)
89 {
90 struct flow_rule *rule = flow_cls_offload_flow_rule(flow);
91 struct flow_dissector *dissector = rule->match.dissector;
92 struct flow_action_entry *act;
93 bool exist_ct_clear = false;
94 struct flow_match_ct ct;
95 int i;
96
97 if (dissector->used_keys & BIT_ULL(FLOW_DISSECTOR_KEY_CT)) {
98 flow_rule_match_ct(rule, &ct);
99 if (ct.key->ct_state & TCA_FLOWER_KEY_CT_FLAGS_ESTABLISHED)
100 return true;
101 } else {
102 /* post ct entry cannot contains any ct action except ct_clear. */
103 flow_action_for_each(i, act, &flow->rule->action) {
104 if (act->id == FLOW_ACTION_CT) {
105 /* ignore ct clear action. */
106 if (act->ct.action == TCA_CT_ACT_CLEAR) {
107 exist_ct_clear = true;
108 continue;
109 }
110
111 return false;
112 }
113 }
114 /* when do nat with ct, the post ct entry ignore the ct status,
115 * will match the nat field(sip/dip) instead. In this situation,
116 * the flow chain index is not zero and contains ct clear action.
117 */
118 if (flow->common.chain_index && exist_ct_clear)
119 return true;
120 }
121
122 return false;
123 }
124
125 /**
126 * get_mangled_key() - Mangle the key if mangle act exists
127 * @rule: rule that carries the actions
128 * @buf: pointer to key to be mangled
129 * @offset: used to adjust mangled offset in L2/L3/L4 header
130 * @key_sz: key size
131 * @htype: mangling type
132 *
133 * Returns buf where the mangled key stores.
134 */
get_mangled_key(struct flow_rule * rule,void * buf,u32 offset,size_t key_sz,enum flow_action_mangle_base htype)135 static void *get_mangled_key(struct flow_rule *rule, void *buf,
136 u32 offset, size_t key_sz,
137 enum flow_action_mangle_base htype)
138 {
139 struct flow_action_entry *act;
140 u32 *val = (u32 *)buf;
141 u32 off, msk, key;
142 int i;
143
144 flow_action_for_each(i, act, &rule->action) {
145 if (act->id == FLOW_ACTION_MANGLE &&
146 act->mangle.htype == htype) {
147 off = act->mangle.offset - offset;
148 msk = act->mangle.mask;
149 key = act->mangle.val;
150
151 /* Mangling is supposed to be u32 aligned */
152 if (off % 4 || off >= key_sz)
153 continue;
154
155 val[off >> 2] &= msk;
156 val[off >> 2] |= key;
157 }
158 }
159
160 return buf;
161 }
162
163 /* Only tos and ttl are involved in flow_match_ip structure, which
164 * doesn't conform to the layout of ip/ipv6 header definition. So
165 * they need particular process here: fill them into the ip/ipv6
166 * header, so that mangling actions can work directly.
167 */
168 #define NFP_IPV4_TOS_MASK GENMASK(23, 16)
169 #define NFP_IPV4_TTL_MASK GENMASK(31, 24)
170 #define NFP_IPV6_TCLASS_MASK GENMASK(27, 20)
171 #define NFP_IPV6_HLIMIT_MASK GENMASK(7, 0)
get_mangled_tos_ttl(struct flow_rule * rule,void * buf,bool is_v6)172 static void *get_mangled_tos_ttl(struct flow_rule *rule, void *buf,
173 bool is_v6)
174 {
175 struct flow_match_ip match;
176 /* IPv4's ttl field is in third dword. */
177 __be32 ip_hdr[3];
178 u32 tmp, hdr_len;
179
180 flow_rule_match_ip(rule, &match);
181
182 if (is_v6) {
183 tmp = FIELD_PREP(NFP_IPV6_TCLASS_MASK, match.key->tos);
184 ip_hdr[0] = cpu_to_be32(tmp);
185 tmp = FIELD_PREP(NFP_IPV6_HLIMIT_MASK, match.key->ttl);
186 ip_hdr[1] = cpu_to_be32(tmp);
187 hdr_len = 2 * sizeof(__be32);
188 } else {
189 tmp = FIELD_PREP(NFP_IPV4_TOS_MASK, match.key->tos);
190 ip_hdr[0] = cpu_to_be32(tmp);
191 tmp = FIELD_PREP(NFP_IPV4_TTL_MASK, match.key->ttl);
192 ip_hdr[2] = cpu_to_be32(tmp);
193 hdr_len = 3 * sizeof(__be32);
194 }
195
196 get_mangled_key(rule, ip_hdr, 0, hdr_len,
197 is_v6 ? FLOW_ACT_MANGLE_HDR_TYPE_IP6 :
198 FLOW_ACT_MANGLE_HDR_TYPE_IP4);
199
200 match.key = buf;
201
202 if (is_v6) {
203 tmp = be32_to_cpu(ip_hdr[0]);
204 match.key->tos = FIELD_GET(NFP_IPV6_TCLASS_MASK, tmp);
205 tmp = be32_to_cpu(ip_hdr[1]);
206 match.key->ttl = FIELD_GET(NFP_IPV6_HLIMIT_MASK, tmp);
207 } else {
208 tmp = be32_to_cpu(ip_hdr[0]);
209 match.key->tos = FIELD_GET(NFP_IPV4_TOS_MASK, tmp);
210 tmp = be32_to_cpu(ip_hdr[2]);
211 match.key->ttl = FIELD_GET(NFP_IPV4_TTL_MASK, tmp);
212 }
213
214 return buf;
215 }
216
217 /* Note entry1 and entry2 are not swappable. only skip ip and
218 * tport merge check for pre_ct and post_ct when pre_ct do nat.
219 */
nfp_ct_merge_check_cannot_skip(struct nfp_fl_ct_flow_entry * entry1,struct nfp_fl_ct_flow_entry * entry2)220 static bool nfp_ct_merge_check_cannot_skip(struct nfp_fl_ct_flow_entry *entry1,
221 struct nfp_fl_ct_flow_entry *entry2)
222 {
223 /* only pre_ct have NFP_FL_ACTION_DO_NAT flag. */
224 if ((entry1->flags & NFP_FL_ACTION_DO_NAT) &&
225 entry2->type == CT_TYPE_POST_CT)
226 return false;
227
228 return true;
229 }
230
231 /* Note entry1 and entry2 are not swappable, entry1 should be
232 * the former flow whose mangle action need be taken into account
233 * if existed, and entry2 should be the latter flow whose action
234 * we don't care.
235 */
nfp_ct_merge_check(struct nfp_fl_ct_flow_entry * entry1,struct nfp_fl_ct_flow_entry * entry2)236 static int nfp_ct_merge_check(struct nfp_fl_ct_flow_entry *entry1,
237 struct nfp_fl_ct_flow_entry *entry2)
238 {
239 unsigned long long ovlp_keys;
240 bool out, is_v6 = false;
241 u8 ip_proto = 0;
242 ovlp_keys = entry1->rule->match.dissector->used_keys &
243 entry2->rule->match.dissector->used_keys;
244 /* Temporary buffer for mangling keys, 64 is enough to cover max
245 * struct size of key in various fields that may be mangled.
246 * Supported fields to mangle:
247 * mac_src/mac_dst(struct flow_match_eth_addrs, 12B)
248 * nw_tos/nw_ttl(struct flow_match_ip, 2B)
249 * nw_src/nw_dst(struct flow_match_ipv4/6_addrs, 32B)
250 * tp_src/tp_dst(struct flow_match_ports, 4B)
251 */
252 char buf[64];
253
254 if (entry1->netdev && entry2->netdev &&
255 entry1->netdev != entry2->netdev)
256 return -EINVAL;
257
258 /* Check the overlapped fields one by one, the unmasked part
259 * should not conflict with each other.
260 */
261 if (ovlp_keys & BIT_ULL(FLOW_DISSECTOR_KEY_CONTROL)) {
262 struct flow_match_control match1, match2;
263
264 flow_rule_match_control(entry1->rule, &match1);
265 flow_rule_match_control(entry2->rule, &match2);
266 COMPARE_UNMASKED_FIELDS(match1, match2, &out);
267 if (out)
268 goto check_failed;
269 }
270
271 if (ovlp_keys & BIT_ULL(FLOW_DISSECTOR_KEY_BASIC)) {
272 struct flow_match_basic match1, match2;
273
274 flow_rule_match_basic(entry1->rule, &match1);
275 flow_rule_match_basic(entry2->rule, &match2);
276
277 /* n_proto field is a must in ct-related flows,
278 * it should be either ipv4 or ipv6.
279 */
280 is_v6 = match1.key->n_proto == htons(ETH_P_IPV6);
281 /* ip_proto field is a must when port field is cared */
282 ip_proto = match1.key->ip_proto;
283
284 COMPARE_UNMASKED_FIELDS(match1, match2, &out);
285 if (out)
286 goto check_failed;
287 }
288
289 /* if pre ct entry do nat, the nat ip exists in nft entry,
290 * will be do merge check when do nft and post ct merge,
291 * so skip this ip merge check here.
292 */
293 if ((ovlp_keys & BIT_ULL(FLOW_DISSECTOR_KEY_IPV4_ADDRS)) &&
294 nfp_ct_merge_check_cannot_skip(entry1, entry2)) {
295 struct flow_match_ipv4_addrs match1, match2;
296
297 flow_rule_match_ipv4_addrs(entry1->rule, &match1);
298 flow_rule_match_ipv4_addrs(entry2->rule, &match2);
299
300 memcpy(buf, match1.key, sizeof(*match1.key));
301 match1.key = get_mangled_key(entry1->rule, buf,
302 offsetof(struct iphdr, saddr),
303 sizeof(*match1.key),
304 FLOW_ACT_MANGLE_HDR_TYPE_IP4);
305
306 COMPARE_UNMASKED_FIELDS(match1, match2, &out);
307 if (out)
308 goto check_failed;
309 }
310
311 /* if pre ct entry do nat, the nat ip exists in nft entry,
312 * will be do merge check when do nft and post ct merge,
313 * so skip this ip merge check here.
314 */
315 if ((ovlp_keys & BIT_ULL(FLOW_DISSECTOR_KEY_IPV6_ADDRS)) &&
316 nfp_ct_merge_check_cannot_skip(entry1, entry2)) {
317 struct flow_match_ipv6_addrs match1, match2;
318
319 flow_rule_match_ipv6_addrs(entry1->rule, &match1);
320 flow_rule_match_ipv6_addrs(entry2->rule, &match2);
321
322 memcpy(buf, match1.key, sizeof(*match1.key));
323 match1.key = get_mangled_key(entry1->rule, buf,
324 offsetof(struct ipv6hdr, saddr),
325 sizeof(*match1.key),
326 FLOW_ACT_MANGLE_HDR_TYPE_IP6);
327
328 COMPARE_UNMASKED_FIELDS(match1, match2, &out);
329 if (out)
330 goto check_failed;
331 }
332
333 /* if pre ct entry do nat, the nat tport exists in nft entry,
334 * will be do merge check when do nft and post ct merge,
335 * so skip this tport merge check here.
336 */
337 if ((ovlp_keys & BIT_ULL(FLOW_DISSECTOR_KEY_PORTS)) &&
338 nfp_ct_merge_check_cannot_skip(entry1, entry2)) {
339 enum flow_action_mangle_base htype = FLOW_ACT_MANGLE_UNSPEC;
340 struct flow_match_ports match1, match2;
341
342 flow_rule_match_ports(entry1->rule, &match1);
343 flow_rule_match_ports(entry2->rule, &match2);
344
345 if (ip_proto == IPPROTO_UDP)
346 htype = FLOW_ACT_MANGLE_HDR_TYPE_UDP;
347 else if (ip_proto == IPPROTO_TCP)
348 htype = FLOW_ACT_MANGLE_HDR_TYPE_TCP;
349
350 memcpy(buf, match1.key, sizeof(*match1.key));
351 match1.key = get_mangled_key(entry1->rule, buf, 0,
352 sizeof(*match1.key), htype);
353
354 COMPARE_UNMASKED_FIELDS(match1, match2, &out);
355 if (out)
356 goto check_failed;
357 }
358
359 if (ovlp_keys & BIT_ULL(FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
360 struct flow_match_eth_addrs match1, match2;
361
362 flow_rule_match_eth_addrs(entry1->rule, &match1);
363 flow_rule_match_eth_addrs(entry2->rule, &match2);
364
365 memcpy(buf, match1.key, sizeof(*match1.key));
366 match1.key = get_mangled_key(entry1->rule, buf, 0,
367 sizeof(*match1.key),
368 FLOW_ACT_MANGLE_HDR_TYPE_ETH);
369
370 COMPARE_UNMASKED_FIELDS(match1, match2, &out);
371 if (out)
372 goto check_failed;
373 }
374
375 if (ovlp_keys & BIT_ULL(FLOW_DISSECTOR_KEY_VLAN)) {
376 struct flow_match_vlan match1, match2;
377
378 flow_rule_match_vlan(entry1->rule, &match1);
379 flow_rule_match_vlan(entry2->rule, &match2);
380 COMPARE_UNMASKED_FIELDS(match1, match2, &out);
381 if (out)
382 goto check_failed;
383 }
384
385 if (ovlp_keys & BIT_ULL(FLOW_DISSECTOR_KEY_MPLS)) {
386 struct flow_match_mpls match1, match2;
387
388 flow_rule_match_mpls(entry1->rule, &match1);
389 flow_rule_match_mpls(entry2->rule, &match2);
390 COMPARE_UNMASKED_FIELDS(match1, match2, &out);
391 if (out)
392 goto check_failed;
393 }
394
395 if (ovlp_keys & BIT_ULL(FLOW_DISSECTOR_KEY_TCP)) {
396 struct flow_match_tcp match1, match2;
397
398 flow_rule_match_tcp(entry1->rule, &match1);
399 flow_rule_match_tcp(entry2->rule, &match2);
400 COMPARE_UNMASKED_FIELDS(match1, match2, &out);
401 if (out)
402 goto check_failed;
403 }
404
405 if (ovlp_keys & BIT_ULL(FLOW_DISSECTOR_KEY_IP)) {
406 struct flow_match_ip match1, match2;
407
408 flow_rule_match_ip(entry1->rule, &match1);
409 flow_rule_match_ip(entry2->rule, &match2);
410
411 match1.key = get_mangled_tos_ttl(entry1->rule, buf, is_v6);
412 COMPARE_UNMASKED_FIELDS(match1, match2, &out);
413 if (out)
414 goto check_failed;
415 }
416
417 if (ovlp_keys & BIT_ULL(FLOW_DISSECTOR_KEY_ENC_KEYID)) {
418 struct flow_match_enc_keyid match1, match2;
419
420 flow_rule_match_enc_keyid(entry1->rule, &match1);
421 flow_rule_match_enc_keyid(entry2->rule, &match2);
422 COMPARE_UNMASKED_FIELDS(match1, match2, &out);
423 if (out)
424 goto check_failed;
425 }
426
427 if (ovlp_keys & BIT_ULL(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS)) {
428 struct flow_match_ipv4_addrs match1, match2;
429
430 flow_rule_match_enc_ipv4_addrs(entry1->rule, &match1);
431 flow_rule_match_enc_ipv4_addrs(entry2->rule, &match2);
432 COMPARE_UNMASKED_FIELDS(match1, match2, &out);
433 if (out)
434 goto check_failed;
435 }
436
437 if (ovlp_keys & BIT_ULL(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS)) {
438 struct flow_match_ipv6_addrs match1, match2;
439
440 flow_rule_match_enc_ipv6_addrs(entry1->rule, &match1);
441 flow_rule_match_enc_ipv6_addrs(entry2->rule, &match2);
442 COMPARE_UNMASKED_FIELDS(match1, match2, &out);
443 if (out)
444 goto check_failed;
445 }
446
447 if (ovlp_keys & BIT_ULL(FLOW_DISSECTOR_KEY_ENC_CONTROL)) {
448 struct flow_match_control match1, match2;
449
450 flow_rule_match_enc_control(entry1->rule, &match1);
451 flow_rule_match_enc_control(entry2->rule, &match2);
452 COMPARE_UNMASKED_FIELDS(match1, match2, &out);
453 if (out)
454 goto check_failed;
455 }
456
457 if (ovlp_keys & BIT_ULL(FLOW_DISSECTOR_KEY_ENC_IP)) {
458 struct flow_match_ip match1, match2;
459
460 flow_rule_match_enc_ip(entry1->rule, &match1);
461 flow_rule_match_enc_ip(entry2->rule, &match2);
462 COMPARE_UNMASKED_FIELDS(match1, match2, &out);
463 if (out)
464 goto check_failed;
465 }
466
467 if (ovlp_keys & BIT_ULL(FLOW_DISSECTOR_KEY_ENC_OPTS)) {
468 struct flow_match_enc_opts match1, match2;
469
470 flow_rule_match_enc_opts(entry1->rule, &match1);
471 flow_rule_match_enc_opts(entry2->rule, &match2);
472 COMPARE_UNMASKED_FIELDS(match1, match2, &out);
473 if (out)
474 goto check_failed;
475 }
476
477 return 0;
478
479 check_failed:
480 return -EINVAL;
481 }
482
nfp_ct_check_vlan_merge(struct flow_action_entry * a_in,struct flow_rule * rule)483 static int nfp_ct_check_vlan_merge(struct flow_action_entry *a_in,
484 struct flow_rule *rule)
485 {
486 struct flow_match_vlan match;
487
488 if (unlikely(flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_CVLAN)))
489 return -EOPNOTSUPP;
490
491 /* post_ct does not match VLAN KEY, can be merged. */
492 if (likely(!flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_VLAN)))
493 return 0;
494
495 switch (a_in->id) {
496 /* pre_ct has pop vlan, post_ct cannot match VLAN KEY, cannot be merged. */
497 case FLOW_ACTION_VLAN_POP:
498 return -EOPNOTSUPP;
499
500 case FLOW_ACTION_VLAN_PUSH:
501 case FLOW_ACTION_VLAN_MANGLE:
502 flow_rule_match_vlan(rule, &match);
503 /* different vlan id, cannot be merged. */
504 if ((match.key->vlan_id & match.mask->vlan_id) ^
505 (a_in->vlan.vid & match.mask->vlan_id))
506 return -EOPNOTSUPP;
507
508 /* different tpid, cannot be merged. */
509 if ((match.key->vlan_tpid & match.mask->vlan_tpid) ^
510 (a_in->vlan.proto & match.mask->vlan_tpid))
511 return -EOPNOTSUPP;
512
513 /* different priority, cannot be merged. */
514 if ((match.key->vlan_priority & match.mask->vlan_priority) ^
515 (a_in->vlan.prio & match.mask->vlan_priority))
516 return -EOPNOTSUPP;
517
518 break;
519 default:
520 return -EOPNOTSUPP;
521 }
522
523 return 0;
524 }
525
526 /* Extra check for multiple ct-zones merge
527 * currently surpport nft entries merge check in different zones
528 */
nfp_ct_merge_extra_check(struct nfp_fl_ct_flow_entry * nft_entry,struct nfp_fl_ct_tc_merge * tc_m_entry)529 static int nfp_ct_merge_extra_check(struct nfp_fl_ct_flow_entry *nft_entry,
530 struct nfp_fl_ct_tc_merge *tc_m_entry)
531 {
532 struct nfp_fl_nft_tc_merge *prev_nft_m_entry;
533 struct nfp_fl_ct_flow_entry *pre_ct_entry;
534
535 pre_ct_entry = tc_m_entry->pre_ct_parent;
536 prev_nft_m_entry = pre_ct_entry->prev_m_entries[pre_ct_entry->num_prev_m_entries - 1];
537
538 return nfp_ct_merge_check(prev_nft_m_entry->nft_parent, nft_entry);
539 }
540
nfp_ct_merge_act_check(struct nfp_fl_ct_flow_entry * pre_ct_entry,struct nfp_fl_ct_flow_entry * post_ct_entry,struct nfp_fl_ct_flow_entry * nft_entry)541 static int nfp_ct_merge_act_check(struct nfp_fl_ct_flow_entry *pre_ct_entry,
542 struct nfp_fl_ct_flow_entry *post_ct_entry,
543 struct nfp_fl_ct_flow_entry *nft_entry)
544 {
545 struct flow_action_entry *act;
546 int i, err;
547
548 /* Check for pre_ct->action conflicts */
549 flow_action_for_each(i, act, &pre_ct_entry->rule->action) {
550 switch (act->id) {
551 case FLOW_ACTION_VLAN_PUSH:
552 case FLOW_ACTION_VLAN_POP:
553 case FLOW_ACTION_VLAN_MANGLE:
554 err = nfp_ct_check_vlan_merge(act, post_ct_entry->rule);
555 if (err)
556 return err;
557 break;
558 case FLOW_ACTION_MPLS_PUSH:
559 case FLOW_ACTION_MPLS_POP:
560 case FLOW_ACTION_MPLS_MANGLE:
561 return -EOPNOTSUPP;
562 default:
563 break;
564 }
565 }
566
567 /* Check for nft->action conflicts */
568 flow_action_for_each(i, act, &nft_entry->rule->action) {
569 switch (act->id) {
570 case FLOW_ACTION_VLAN_PUSH:
571 case FLOW_ACTION_VLAN_POP:
572 case FLOW_ACTION_VLAN_MANGLE:
573 case FLOW_ACTION_MPLS_PUSH:
574 case FLOW_ACTION_MPLS_POP:
575 case FLOW_ACTION_MPLS_MANGLE:
576 return -EOPNOTSUPP;
577 default:
578 break;
579 }
580 }
581 return 0;
582 }
583
nfp_ct_check_meta(struct nfp_fl_ct_flow_entry * post_ct_entry,struct nfp_fl_ct_flow_entry * nft_entry)584 static int nfp_ct_check_meta(struct nfp_fl_ct_flow_entry *post_ct_entry,
585 struct nfp_fl_ct_flow_entry *nft_entry)
586 {
587 struct flow_dissector *dissector = post_ct_entry->rule->match.dissector;
588 struct flow_action_entry *ct_met;
589 struct flow_match_ct ct;
590 int i;
591
592 ct_met = get_flow_act(nft_entry->rule, FLOW_ACTION_CT_METADATA);
593 if (ct_met && (dissector->used_keys & BIT_ULL(FLOW_DISSECTOR_KEY_CT))) {
594 u32 *act_lbl;
595
596 act_lbl = ct_met->ct_metadata.labels;
597 flow_rule_match_ct(post_ct_entry->rule, &ct);
598 for (i = 0; i < 4; i++) {
599 if ((ct.key->ct_labels[i] & ct.mask->ct_labels[i]) ^
600 (act_lbl[i] & ct.mask->ct_labels[i]))
601 return -EINVAL;
602 }
603
604 if ((ct.key->ct_mark & ct.mask->ct_mark) ^
605 (ct_met->ct_metadata.mark & ct.mask->ct_mark))
606 return -EINVAL;
607
608 return 0;
609 } else {
610 /* post_ct with ct clear action will not match the
611 * ct status when nft is nat entry.
612 */
613 if (nft_entry->flags & NFP_FL_ACTION_DO_MANGLE)
614 return 0;
615 }
616
617 return -EINVAL;
618 }
619
620 static int
nfp_fl_calc_key_layers_sz(struct nfp_fl_key_ls in_key_ls,uint16_t * map)621 nfp_fl_calc_key_layers_sz(struct nfp_fl_key_ls in_key_ls, uint16_t *map)
622 {
623 int key_size;
624
625 /* This field must always be present */
626 key_size = sizeof(struct nfp_flower_meta_tci);
627 map[FLOW_PAY_META_TCI] = 0;
628
629 if (in_key_ls.key_layer & NFP_FLOWER_LAYER_EXT_META) {
630 map[FLOW_PAY_EXT_META] = key_size;
631 key_size += sizeof(struct nfp_flower_ext_meta);
632 }
633 if (in_key_ls.key_layer & NFP_FLOWER_LAYER_PORT) {
634 map[FLOW_PAY_INPORT] = key_size;
635 key_size += sizeof(struct nfp_flower_in_port);
636 }
637 if (in_key_ls.key_layer & NFP_FLOWER_LAYER_MAC) {
638 map[FLOW_PAY_MAC_MPLS] = key_size;
639 key_size += sizeof(struct nfp_flower_mac_mpls);
640 }
641 if (in_key_ls.key_layer & NFP_FLOWER_LAYER_TP) {
642 map[FLOW_PAY_L4] = key_size;
643 key_size += sizeof(struct nfp_flower_tp_ports);
644 }
645 if (in_key_ls.key_layer & NFP_FLOWER_LAYER_IPV4) {
646 map[FLOW_PAY_IPV4] = key_size;
647 key_size += sizeof(struct nfp_flower_ipv4);
648 }
649 if (in_key_ls.key_layer & NFP_FLOWER_LAYER_IPV6) {
650 map[FLOW_PAY_IPV6] = key_size;
651 key_size += sizeof(struct nfp_flower_ipv6);
652 }
653
654 if (in_key_ls.key_layer_two & NFP_FLOWER_LAYER2_QINQ) {
655 map[FLOW_PAY_QINQ] = key_size;
656 key_size += sizeof(struct nfp_flower_vlan);
657 }
658
659 if (in_key_ls.key_layer_two & NFP_FLOWER_LAYER2_GRE) {
660 map[FLOW_PAY_GRE] = key_size;
661 if (in_key_ls.key_layer_two & NFP_FLOWER_LAYER2_TUN_IPV6)
662 key_size += sizeof(struct nfp_flower_ipv6_gre_tun);
663 else
664 key_size += sizeof(struct nfp_flower_ipv4_gre_tun);
665 }
666
667 if ((in_key_ls.key_layer & NFP_FLOWER_LAYER_VXLAN) ||
668 (in_key_ls.key_layer_two & NFP_FLOWER_LAYER2_GENEVE)) {
669 map[FLOW_PAY_UDP_TUN] = key_size;
670 if (in_key_ls.key_layer_two & NFP_FLOWER_LAYER2_TUN_IPV6)
671 key_size += sizeof(struct nfp_flower_ipv6_udp_tun);
672 else
673 key_size += sizeof(struct nfp_flower_ipv4_udp_tun);
674 }
675
676 if (in_key_ls.key_layer_two & NFP_FLOWER_LAYER2_GENEVE_OP) {
677 map[FLOW_PAY_GENEVE_OPT] = key_size;
678 key_size += sizeof(struct nfp_flower_geneve_options);
679 }
680
681 return key_size;
682 }
683
684 /* get the csum flag according the ip proto and mangle action. */
nfp_fl_get_csum_flag(struct flow_action_entry * a_in,u8 ip_proto,u32 * csum)685 static void nfp_fl_get_csum_flag(struct flow_action_entry *a_in, u8 ip_proto, u32 *csum)
686 {
687 if (a_in->id != FLOW_ACTION_MANGLE)
688 return;
689
690 switch (a_in->mangle.htype) {
691 case FLOW_ACT_MANGLE_HDR_TYPE_IP4:
692 *csum |= TCA_CSUM_UPDATE_FLAG_IPV4HDR;
693 if (ip_proto == IPPROTO_TCP)
694 *csum |= TCA_CSUM_UPDATE_FLAG_TCP;
695 else if (ip_proto == IPPROTO_UDP)
696 *csum |= TCA_CSUM_UPDATE_FLAG_UDP;
697 break;
698 case FLOW_ACT_MANGLE_HDR_TYPE_TCP:
699 *csum |= TCA_CSUM_UPDATE_FLAG_TCP;
700 break;
701 case FLOW_ACT_MANGLE_HDR_TYPE_UDP:
702 *csum |= TCA_CSUM_UPDATE_FLAG_UDP;
703 break;
704 default:
705 break;
706 }
707 }
708
nfp_fl_merge_actions_offload(struct flow_rule ** rules,struct nfp_flower_priv * priv,struct net_device * netdev,struct nfp_fl_payload * flow_pay,int num_rules)709 static int nfp_fl_merge_actions_offload(struct flow_rule **rules,
710 struct nfp_flower_priv *priv,
711 struct net_device *netdev,
712 struct nfp_fl_payload *flow_pay,
713 int num_rules)
714 {
715 enum flow_action_hw_stats tmp_stats = FLOW_ACTION_HW_STATS_DONT_CARE;
716 struct flow_action_entry *a_in;
717 int i, j, id, num_actions = 0;
718 struct flow_rule *a_rule;
719 int err = 0, offset = 0;
720
721 for (i = 0; i < num_rules; i++)
722 num_actions += rules[i]->action.num_entries;
723
724 /* Add one action to make sure there is enough room to add an checksum action
725 * when do nat.
726 */
727 a_rule = flow_rule_alloc(num_actions + (num_rules / 2));
728 if (!a_rule)
729 return -ENOMEM;
730
731 /* post_ct entry have one action at least. */
732 if (rules[num_rules - 1]->action.num_entries != 0)
733 tmp_stats = rules[num_rules - 1]->action.entries[0].hw_stats;
734
735 /* Actions need a BASIC dissector. */
736 a_rule->match = rules[0]->match;
737
738 /* Copy actions */
739 for (j = 0; j < num_rules; j++) {
740 u32 csum_updated = 0;
741 u8 ip_proto = 0;
742
743 if (flow_rule_match_key(rules[j], FLOW_DISSECTOR_KEY_BASIC)) {
744 struct flow_match_basic match;
745
746 /* ip_proto is the only field that is needed in later compile_action,
747 * needed to set the correct checksum flags. It doesn't really matter
748 * which input rule's ip_proto field we take as the earlier merge checks
749 * would have made sure that they don't conflict. We do not know which
750 * of the subflows would have the ip_proto filled in, so we need to iterate
751 * through the subflows and assign the proper subflow to a_rule
752 */
753 flow_rule_match_basic(rules[j], &match);
754 if (match.mask->ip_proto) {
755 a_rule->match = rules[j]->match;
756 ip_proto = match.key->ip_proto;
757 }
758 }
759
760 for (i = 0; i < rules[j]->action.num_entries; i++) {
761 a_in = &rules[j]->action.entries[i];
762 id = a_in->id;
763
764 /* Ignore CT related actions as these would already have
765 * been taken care of by previous checks, and we do not send
766 * any CT actions to the firmware.
767 */
768 switch (id) {
769 case FLOW_ACTION_CT:
770 case FLOW_ACTION_GOTO:
771 case FLOW_ACTION_CT_METADATA:
772 continue;
773 default:
774 /* nft entry is generated by tc ct, which mangle action do not care
775 * the stats, inherit the post entry stats to meet the
776 * flow_action_hw_stats_check.
777 * nft entry flow rules are at odd array index.
778 */
779 if (j & 0x01) {
780 if (a_in->hw_stats == FLOW_ACTION_HW_STATS_DONT_CARE)
781 a_in->hw_stats = tmp_stats;
782 nfp_fl_get_csum_flag(a_in, ip_proto, &csum_updated);
783 }
784 memcpy(&a_rule->action.entries[offset++],
785 a_in, sizeof(struct flow_action_entry));
786 break;
787 }
788 }
789 /* nft entry have mangle action, but do not have checksum action when do NAT,
790 * hardware will automatically fix IPv4 and TCP/UDP checksum. so add an csum action
791 * to meet csum action check.
792 */
793 if (csum_updated) {
794 struct flow_action_entry *csum_action;
795
796 csum_action = &a_rule->action.entries[offset++];
797 csum_action->id = FLOW_ACTION_CSUM;
798 csum_action->csum_flags = csum_updated;
799 csum_action->hw_stats = tmp_stats;
800 }
801 }
802
803 /* Some actions would have been ignored, so update the num_entries field */
804 a_rule->action.num_entries = offset;
805 err = nfp_flower_compile_action(priv->app, a_rule, netdev, flow_pay, NULL);
806 kfree(a_rule);
807
808 return err;
809 }
810
nfp_fl_ct_add_offload(struct nfp_fl_nft_tc_merge * m_entry)811 static int nfp_fl_ct_add_offload(struct nfp_fl_nft_tc_merge *m_entry)
812 {
813 enum nfp_flower_tun_type tun_type = NFP_FL_TUNNEL_NONE;
814 struct nfp_fl_ct_zone_entry *zt = m_entry->zt;
815 struct flow_rule *rules[NFP_MAX_ENTRY_RULES];
816 struct nfp_fl_ct_flow_entry *pre_ct_entry;
817 struct nfp_fl_key_ls key_layer, tmp_layer;
818 struct nfp_flower_priv *priv = zt->priv;
819 u16 key_map[_FLOW_PAY_LAYERS_MAX];
820 struct nfp_fl_payload *flow_pay;
821 u8 *key, *msk, *kdata, *mdata;
822 struct nfp_port *port = NULL;
823 int num_rules, err, i, j = 0;
824 struct net_device *netdev;
825 bool qinq_sup;
826 u32 port_id;
827 u16 offset;
828
829 netdev = m_entry->netdev;
830 qinq_sup = !!(priv->flower_ext_feats & NFP_FL_FEATS_VLAN_QINQ);
831
832 pre_ct_entry = m_entry->tc_m_parent->pre_ct_parent;
833 num_rules = pre_ct_entry->num_prev_m_entries * 2 + _CT_TYPE_MAX;
834
835 for (i = 0; i < pre_ct_entry->num_prev_m_entries; i++) {
836 rules[j++] = pre_ct_entry->prev_m_entries[i]->tc_m_parent->pre_ct_parent->rule;
837 rules[j++] = pre_ct_entry->prev_m_entries[i]->nft_parent->rule;
838 }
839
840 rules[j++] = m_entry->tc_m_parent->pre_ct_parent->rule;
841 rules[j++] = m_entry->nft_parent->rule;
842 rules[j++] = m_entry->tc_m_parent->post_ct_parent->rule;
843
844 memset(&key_layer, 0, sizeof(struct nfp_fl_key_ls));
845 memset(&key_map, 0, sizeof(key_map));
846
847 /* Calculate the resultant key layer and size for offload */
848 for (i = 0; i < num_rules; i++) {
849 err = nfp_flower_calculate_key_layers(priv->app,
850 m_entry->netdev,
851 &tmp_layer, rules[i],
852 &tun_type, NULL);
853 if (err)
854 return err;
855
856 key_layer.key_layer |= tmp_layer.key_layer;
857 key_layer.key_layer_two |= tmp_layer.key_layer_two;
858 }
859 key_layer.key_size = nfp_fl_calc_key_layers_sz(key_layer, key_map);
860
861 flow_pay = nfp_flower_allocate_new(&key_layer);
862 if (!flow_pay)
863 return -ENOMEM;
864
865 memset(flow_pay->unmasked_data, 0, key_layer.key_size);
866 memset(flow_pay->mask_data, 0, key_layer.key_size);
867
868 kdata = flow_pay->unmasked_data;
869 mdata = flow_pay->mask_data;
870
871 offset = key_map[FLOW_PAY_META_TCI];
872 key = kdata + offset;
873 msk = mdata + offset;
874 nfp_flower_compile_meta((struct nfp_flower_meta_tci *)key,
875 (struct nfp_flower_meta_tci *)msk,
876 key_layer.key_layer);
877
878 if (NFP_FLOWER_LAYER_EXT_META & key_layer.key_layer) {
879 offset = key_map[FLOW_PAY_EXT_META];
880 key = kdata + offset;
881 msk = mdata + offset;
882 nfp_flower_compile_ext_meta((struct nfp_flower_ext_meta *)key,
883 key_layer.key_layer_two);
884 nfp_flower_compile_ext_meta((struct nfp_flower_ext_meta *)msk,
885 key_layer.key_layer_two);
886 }
887
888 /* Using in_port from the -trk rule. The tc merge checks should already
889 * be checking that the ingress netdevs are the same
890 */
891 port_id = nfp_flower_get_port_id_from_netdev(priv->app, netdev);
892 offset = key_map[FLOW_PAY_INPORT];
893 key = kdata + offset;
894 msk = mdata + offset;
895 err = nfp_flower_compile_port((struct nfp_flower_in_port *)key,
896 port_id, false, tun_type, NULL);
897 if (err)
898 goto ct_offload_err;
899 err = nfp_flower_compile_port((struct nfp_flower_in_port *)msk,
900 port_id, true, tun_type, NULL);
901 if (err)
902 goto ct_offload_err;
903
904 /* This following part works on the assumption that previous checks has
905 * already filtered out flows that has different values for the different
906 * layers. Here we iterate through all three rules and merge their respective
907 * masked value(cared bits), basic method is:
908 * final_key = (r1_key & r1_mask) | (r2_key & r2_mask) | (r3_key & r3_mask)
909 * final_mask = r1_mask | r2_mask | r3_mask
910 * If none of the rules contains a match that is also fine, that simply means
911 * that the layer is not present.
912 */
913 if (!qinq_sup) {
914 for (i = 0; i < num_rules; i++) {
915 offset = key_map[FLOW_PAY_META_TCI];
916 key = kdata + offset;
917 msk = mdata + offset;
918 nfp_flower_compile_tci((struct nfp_flower_meta_tci *)key,
919 (struct nfp_flower_meta_tci *)msk,
920 rules[i]);
921 }
922 }
923
924 if (NFP_FLOWER_LAYER_MAC & key_layer.key_layer) {
925 offset = key_map[FLOW_PAY_MAC_MPLS];
926 key = kdata + offset;
927 msk = mdata + offset;
928 for (i = 0; i < num_rules; i++) {
929 nfp_flower_compile_mac((struct nfp_flower_mac_mpls *)key,
930 (struct nfp_flower_mac_mpls *)msk,
931 rules[i]);
932 err = nfp_flower_compile_mpls((struct nfp_flower_mac_mpls *)key,
933 (struct nfp_flower_mac_mpls *)msk,
934 rules[i], NULL);
935 if (err)
936 goto ct_offload_err;
937 }
938 }
939
940 if (NFP_FLOWER_LAYER_IPV4 & key_layer.key_layer) {
941 offset = key_map[FLOW_PAY_IPV4];
942 key = kdata + offset;
943 msk = mdata + offset;
944 for (i = 0; i < num_rules; i++) {
945 nfp_flower_compile_ipv4((struct nfp_flower_ipv4 *)key,
946 (struct nfp_flower_ipv4 *)msk,
947 rules[i]);
948 }
949 }
950
951 if (NFP_FLOWER_LAYER_IPV6 & key_layer.key_layer) {
952 offset = key_map[FLOW_PAY_IPV6];
953 key = kdata + offset;
954 msk = mdata + offset;
955 for (i = 0; i < num_rules; i++) {
956 nfp_flower_compile_ipv6((struct nfp_flower_ipv6 *)key,
957 (struct nfp_flower_ipv6 *)msk,
958 rules[i]);
959 }
960 }
961
962 if (NFP_FLOWER_LAYER_TP & key_layer.key_layer) {
963 offset = key_map[FLOW_PAY_L4];
964 key = kdata + offset;
965 msk = mdata + offset;
966 for (i = 0; i < num_rules; i++) {
967 nfp_flower_compile_tport((struct nfp_flower_tp_ports *)key,
968 (struct nfp_flower_tp_ports *)msk,
969 rules[i]);
970 }
971 }
972
973 if (NFP_FLOWER_LAYER2_QINQ & key_layer.key_layer_two) {
974 offset = key_map[FLOW_PAY_QINQ];
975 key = kdata + offset;
976 msk = mdata + offset;
977 for (i = 0; i < num_rules; i++) {
978 nfp_flower_compile_vlan((struct nfp_flower_vlan *)key,
979 (struct nfp_flower_vlan *)msk,
980 rules[i]);
981 }
982 }
983
984 if (key_layer.key_layer_two & NFP_FLOWER_LAYER2_GRE) {
985 offset = key_map[FLOW_PAY_GRE];
986 key = kdata + offset;
987 msk = mdata + offset;
988 if (key_layer.key_layer_two & NFP_FLOWER_LAYER2_TUN_IPV6) {
989 struct nfp_flower_ipv6_gre_tun *gre_match;
990 struct nfp_ipv6_addr_entry *entry;
991 struct in6_addr *dst;
992
993 for (i = 0; i < num_rules; i++) {
994 nfp_flower_compile_ipv6_gre_tun((void *)key,
995 (void *)msk, rules[i]);
996 }
997 gre_match = (struct nfp_flower_ipv6_gre_tun *)key;
998 dst = &gre_match->ipv6.dst;
999
1000 entry = nfp_tunnel_add_ipv6_off(priv->app, dst);
1001 if (!entry) {
1002 err = -ENOMEM;
1003 goto ct_offload_err;
1004 }
1005
1006 flow_pay->nfp_tun_ipv6 = entry;
1007 } else {
1008 __be32 dst;
1009
1010 for (i = 0; i < num_rules; i++) {
1011 nfp_flower_compile_ipv4_gre_tun((void *)key,
1012 (void *)msk, rules[i]);
1013 }
1014 dst = ((struct nfp_flower_ipv4_gre_tun *)key)->ipv4.dst;
1015
1016 /* Store the tunnel destination in the rule data.
1017 * This must be present and be an exact match.
1018 */
1019 flow_pay->nfp_tun_ipv4_addr = dst;
1020 nfp_tunnel_add_ipv4_off(priv->app, dst);
1021 }
1022 }
1023
1024 if (key_layer.key_layer & NFP_FLOWER_LAYER_VXLAN ||
1025 key_layer.key_layer_two & NFP_FLOWER_LAYER2_GENEVE) {
1026 offset = key_map[FLOW_PAY_UDP_TUN];
1027 key = kdata + offset;
1028 msk = mdata + offset;
1029 if (key_layer.key_layer_two & NFP_FLOWER_LAYER2_TUN_IPV6) {
1030 struct nfp_flower_ipv6_udp_tun *udp_match;
1031 struct nfp_ipv6_addr_entry *entry;
1032 struct in6_addr *dst;
1033
1034 for (i = 0; i < num_rules; i++) {
1035 nfp_flower_compile_ipv6_udp_tun((void *)key,
1036 (void *)msk, rules[i]);
1037 }
1038 udp_match = (struct nfp_flower_ipv6_udp_tun *)key;
1039 dst = &udp_match->ipv6.dst;
1040
1041 entry = nfp_tunnel_add_ipv6_off(priv->app, dst);
1042 if (!entry) {
1043 err = -ENOMEM;
1044 goto ct_offload_err;
1045 }
1046
1047 flow_pay->nfp_tun_ipv6 = entry;
1048 } else {
1049 __be32 dst;
1050
1051 for (i = 0; i < num_rules; i++) {
1052 nfp_flower_compile_ipv4_udp_tun((void *)key,
1053 (void *)msk, rules[i]);
1054 }
1055 dst = ((struct nfp_flower_ipv4_udp_tun *)key)->ipv4.dst;
1056
1057 /* Store the tunnel destination in the rule data.
1058 * This must be present and be an exact match.
1059 */
1060 flow_pay->nfp_tun_ipv4_addr = dst;
1061 nfp_tunnel_add_ipv4_off(priv->app, dst);
1062 }
1063
1064 if (key_layer.key_layer_two & NFP_FLOWER_LAYER2_GENEVE_OP) {
1065 offset = key_map[FLOW_PAY_GENEVE_OPT];
1066 key = kdata + offset;
1067 msk = mdata + offset;
1068 for (i = 0; i < num_rules; i++)
1069 nfp_flower_compile_geneve_opt(key, msk, rules[i]);
1070 }
1071 }
1072
1073 /* Merge actions into flow_pay */
1074 err = nfp_fl_merge_actions_offload(rules, priv, netdev, flow_pay, num_rules);
1075 if (err)
1076 goto ct_offload_err;
1077
1078 /* Use the pointer address as the cookie, but set the last bit to 1.
1079 * This is to avoid the 'is_merge_flow' check from detecting this as
1080 * an already merged flow. This works since address alignment means
1081 * that the last bit for pointer addresses will be 0.
1082 */
1083 flow_pay->tc_flower_cookie = ((unsigned long)flow_pay) | 0x1;
1084 err = nfp_compile_flow_metadata(priv->app, flow_pay->tc_flower_cookie,
1085 flow_pay, netdev, NULL);
1086 if (err)
1087 goto ct_offload_err;
1088
1089 if (nfp_netdev_is_nfp_repr(netdev))
1090 port = nfp_port_from_netdev(netdev);
1091
1092 err = rhashtable_insert_fast(&priv->flow_table, &flow_pay->fl_node,
1093 nfp_flower_table_params);
1094 if (err)
1095 goto ct_release_offload_meta_err;
1096
1097 err = nfp_flower_xmit_flow(priv->app, flow_pay,
1098 NFP_FLOWER_CMSG_TYPE_FLOW_ADD);
1099 if (err)
1100 goto ct_remove_rhash_err;
1101
1102 m_entry->tc_flower_cookie = flow_pay->tc_flower_cookie;
1103 m_entry->flow_pay = flow_pay;
1104
1105 if (port)
1106 port->tc_offload_cnt++;
1107
1108 return err;
1109
1110 ct_remove_rhash_err:
1111 WARN_ON_ONCE(rhashtable_remove_fast(&priv->flow_table,
1112 &flow_pay->fl_node,
1113 nfp_flower_table_params));
1114 ct_release_offload_meta_err:
1115 nfp_modify_flow_metadata(priv->app, flow_pay);
1116 ct_offload_err:
1117 if (flow_pay->nfp_tun_ipv4_addr)
1118 nfp_tunnel_del_ipv4_off(priv->app, flow_pay->nfp_tun_ipv4_addr);
1119 if (flow_pay->nfp_tun_ipv6)
1120 nfp_tunnel_put_ipv6_off(priv->app, flow_pay->nfp_tun_ipv6);
1121 kfree(flow_pay->action_data);
1122 kfree(flow_pay->mask_data);
1123 kfree(flow_pay->unmasked_data);
1124 kfree(flow_pay);
1125 return err;
1126 }
1127
nfp_fl_ct_del_offload(struct nfp_app * app,unsigned long cookie,struct net_device * netdev)1128 static int nfp_fl_ct_del_offload(struct nfp_app *app, unsigned long cookie,
1129 struct net_device *netdev)
1130 {
1131 struct nfp_flower_priv *priv = app->priv;
1132 struct nfp_fl_payload *flow_pay;
1133 struct nfp_port *port = NULL;
1134 int err = 0;
1135
1136 if (nfp_netdev_is_nfp_repr(netdev))
1137 port = nfp_port_from_netdev(netdev);
1138
1139 flow_pay = nfp_flower_search_fl_table(app, cookie, netdev);
1140 if (!flow_pay)
1141 return -ENOENT;
1142
1143 err = nfp_modify_flow_metadata(app, flow_pay);
1144 if (err)
1145 goto err_free_merge_flow;
1146
1147 if (flow_pay->nfp_tun_ipv4_addr)
1148 nfp_tunnel_del_ipv4_off(app, flow_pay->nfp_tun_ipv4_addr);
1149
1150 if (flow_pay->nfp_tun_ipv6)
1151 nfp_tunnel_put_ipv6_off(app, flow_pay->nfp_tun_ipv6);
1152
1153 if (!flow_pay->in_hw) {
1154 err = 0;
1155 goto err_free_merge_flow;
1156 }
1157
1158 err = nfp_flower_xmit_flow(app, flow_pay,
1159 NFP_FLOWER_CMSG_TYPE_FLOW_DEL);
1160
1161 err_free_merge_flow:
1162 nfp_flower_del_linked_merge_flows(app, flow_pay);
1163 if (port)
1164 port->tc_offload_cnt--;
1165 kfree(flow_pay->action_data);
1166 kfree(flow_pay->mask_data);
1167 kfree(flow_pay->unmasked_data);
1168 WARN_ON_ONCE(rhashtable_remove_fast(&priv->flow_table,
1169 &flow_pay->fl_node,
1170 nfp_flower_table_params));
1171 kfree_rcu(flow_pay, rcu);
1172 return err;
1173 }
1174
nfp_ct_do_nft_merge(struct nfp_fl_ct_zone_entry * zt,struct nfp_fl_ct_flow_entry * nft_entry,struct nfp_fl_ct_tc_merge * tc_m_entry)1175 static int nfp_ct_do_nft_merge(struct nfp_fl_ct_zone_entry *zt,
1176 struct nfp_fl_ct_flow_entry *nft_entry,
1177 struct nfp_fl_ct_tc_merge *tc_m_entry)
1178 {
1179 struct nfp_fl_ct_flow_entry *post_ct_entry, *pre_ct_entry;
1180 struct nfp_fl_nft_tc_merge *nft_m_entry;
1181 unsigned long new_cookie[3];
1182 int err;
1183
1184 pre_ct_entry = tc_m_entry->pre_ct_parent;
1185 post_ct_entry = tc_m_entry->post_ct_parent;
1186
1187 err = nfp_ct_merge_act_check(pre_ct_entry, post_ct_entry, nft_entry);
1188 if (err)
1189 return err;
1190
1191 /* Check that the two tc flows are also compatible with
1192 * the nft entry. No need to check the pre_ct and post_ct
1193 * entries as that was already done during pre_merge.
1194 * The nft entry does not have a chain populated, so
1195 * skip this check.
1196 */
1197 err = nfp_ct_merge_check(pre_ct_entry, nft_entry);
1198 if (err)
1199 return err;
1200 err = nfp_ct_merge_check(nft_entry, post_ct_entry);
1201 if (err)
1202 return err;
1203 err = nfp_ct_check_meta(post_ct_entry, nft_entry);
1204 if (err)
1205 return err;
1206
1207 if (pre_ct_entry->num_prev_m_entries > 0) {
1208 err = nfp_ct_merge_extra_check(nft_entry, tc_m_entry);
1209 if (err)
1210 return err;
1211 }
1212
1213 /* Combine tc_merge and nft cookies for this cookie. */
1214 new_cookie[0] = tc_m_entry->cookie[0];
1215 new_cookie[1] = tc_m_entry->cookie[1];
1216 new_cookie[2] = nft_entry->cookie;
1217 nft_m_entry = get_hashentry(&zt->nft_merge_tb,
1218 &new_cookie,
1219 nfp_nft_ct_merge_params,
1220 sizeof(*nft_m_entry));
1221
1222 if (IS_ERR(nft_m_entry))
1223 return PTR_ERR(nft_m_entry);
1224
1225 /* nft_m_entry already present, not merging again */
1226 if (!memcmp(&new_cookie, nft_m_entry->cookie, sizeof(new_cookie)))
1227 return 0;
1228
1229 memcpy(&nft_m_entry->cookie, &new_cookie, sizeof(new_cookie));
1230 nft_m_entry->zt = zt;
1231 nft_m_entry->tc_m_parent = tc_m_entry;
1232 nft_m_entry->nft_parent = nft_entry;
1233 nft_m_entry->tc_flower_cookie = 0;
1234 /* Copy the netdev from the pre_ct entry. When the tc_m_entry was created
1235 * it only combined them if the netdevs were the same, so can use any of them.
1236 */
1237 nft_m_entry->netdev = pre_ct_entry->netdev;
1238
1239 /* Add this entry to the tc_m_list and nft_flow lists */
1240 list_add(&nft_m_entry->tc_merge_list, &tc_m_entry->children);
1241 list_add(&nft_m_entry->nft_flow_list, &nft_entry->children);
1242
1243 err = rhashtable_insert_fast(&zt->nft_merge_tb, &nft_m_entry->hash_node,
1244 nfp_nft_ct_merge_params);
1245 if (err)
1246 goto err_nft_ct_merge_insert;
1247
1248 zt->nft_merge_count++;
1249
1250 if (post_ct_entry->goto_chain_index > 0)
1251 return nfp_fl_create_new_pre_ct(nft_m_entry);
1252
1253 /* Generate offload structure and send to nfp */
1254 err = nfp_fl_ct_add_offload(nft_m_entry);
1255 if (err)
1256 goto err_nft_ct_offload;
1257
1258 return err;
1259
1260 err_nft_ct_offload:
1261 nfp_fl_ct_del_offload(zt->priv->app, nft_m_entry->tc_flower_cookie,
1262 nft_m_entry->netdev);
1263 err_nft_ct_merge_insert:
1264 list_del(&nft_m_entry->tc_merge_list);
1265 list_del(&nft_m_entry->nft_flow_list);
1266 kfree(nft_m_entry);
1267 return err;
1268 }
1269
nfp_ct_do_tc_merge(struct nfp_fl_ct_zone_entry * zt,struct nfp_fl_ct_flow_entry * ct_entry1,struct nfp_fl_ct_flow_entry * ct_entry2)1270 static int nfp_ct_do_tc_merge(struct nfp_fl_ct_zone_entry *zt,
1271 struct nfp_fl_ct_flow_entry *ct_entry1,
1272 struct nfp_fl_ct_flow_entry *ct_entry2)
1273 {
1274 struct nfp_fl_ct_flow_entry *post_ct_entry, *pre_ct_entry;
1275 struct nfp_fl_ct_flow_entry *nft_entry, *nft_tmp;
1276 struct nfp_fl_ct_tc_merge *m_entry;
1277 unsigned long new_cookie[2];
1278 int err;
1279
1280 if (ct_entry1->type == CT_TYPE_PRE_CT) {
1281 pre_ct_entry = ct_entry1;
1282 post_ct_entry = ct_entry2;
1283 } else {
1284 post_ct_entry = ct_entry1;
1285 pre_ct_entry = ct_entry2;
1286 }
1287
1288 /* Checks that the chain_index of the filter matches the
1289 * chain_index of the GOTO action.
1290 */
1291 if (post_ct_entry->chain_index != pre_ct_entry->goto_chain_index)
1292 return -EINVAL;
1293
1294 err = nfp_ct_merge_check(pre_ct_entry, post_ct_entry);
1295 if (err)
1296 return err;
1297
1298 new_cookie[0] = pre_ct_entry->cookie;
1299 new_cookie[1] = post_ct_entry->cookie;
1300 m_entry = get_hashentry(&zt->tc_merge_tb, &new_cookie,
1301 nfp_tc_ct_merge_params, sizeof(*m_entry));
1302 if (IS_ERR(m_entry))
1303 return PTR_ERR(m_entry);
1304
1305 /* m_entry already present, not merging again */
1306 if (!memcmp(&new_cookie, m_entry->cookie, sizeof(new_cookie)))
1307 return 0;
1308
1309 memcpy(&m_entry->cookie, &new_cookie, sizeof(new_cookie));
1310 m_entry->zt = zt;
1311 m_entry->post_ct_parent = post_ct_entry;
1312 m_entry->pre_ct_parent = pre_ct_entry;
1313
1314 /* Add this entry to the pre_ct and post_ct lists */
1315 list_add(&m_entry->post_ct_list, &post_ct_entry->children);
1316 list_add(&m_entry->pre_ct_list, &pre_ct_entry->children);
1317 INIT_LIST_HEAD(&m_entry->children);
1318
1319 err = rhashtable_insert_fast(&zt->tc_merge_tb, &m_entry->hash_node,
1320 nfp_tc_ct_merge_params);
1321 if (err)
1322 goto err_ct_tc_merge_insert;
1323 zt->tc_merge_count++;
1324
1325 /* Merge with existing nft flows */
1326 list_for_each_entry_safe(nft_entry, nft_tmp, &zt->nft_flows_list,
1327 list_node) {
1328 nfp_ct_do_nft_merge(zt, nft_entry, m_entry);
1329 }
1330
1331 return 0;
1332
1333 err_ct_tc_merge_insert:
1334 list_del(&m_entry->post_ct_list);
1335 list_del(&m_entry->pre_ct_list);
1336 kfree(m_entry);
1337 return err;
1338 }
1339
1340 static struct
get_nfp_zone_entry(struct nfp_flower_priv * priv,u16 zone,bool wildcarded)1341 nfp_fl_ct_zone_entry *get_nfp_zone_entry(struct nfp_flower_priv *priv,
1342 u16 zone, bool wildcarded)
1343 {
1344 struct nfp_fl_ct_zone_entry *zt;
1345 int err;
1346
1347 if (wildcarded && priv->ct_zone_wc)
1348 return priv->ct_zone_wc;
1349
1350 if (!wildcarded) {
1351 zt = get_hashentry(&priv->ct_zone_table, &zone,
1352 nfp_zone_table_params, sizeof(*zt));
1353
1354 /* If priv is set this is an existing entry, just return it */
1355 if (IS_ERR(zt) || zt->priv)
1356 return zt;
1357 } else {
1358 zt = kzalloc(sizeof(*zt), GFP_KERNEL);
1359 if (!zt)
1360 return ERR_PTR(-ENOMEM);
1361 }
1362
1363 zt->zone = zone;
1364 zt->priv = priv;
1365 zt->nft = NULL;
1366
1367 /* init the various hash tables and lists */
1368 INIT_LIST_HEAD(&zt->pre_ct_list);
1369 INIT_LIST_HEAD(&zt->post_ct_list);
1370 INIT_LIST_HEAD(&zt->nft_flows_list);
1371
1372 err = rhashtable_init(&zt->tc_merge_tb, &nfp_tc_ct_merge_params);
1373 if (err)
1374 goto err_tc_merge_tb_init;
1375
1376 err = rhashtable_init(&zt->nft_merge_tb, &nfp_nft_ct_merge_params);
1377 if (err)
1378 goto err_nft_merge_tb_init;
1379
1380 if (wildcarded) {
1381 priv->ct_zone_wc = zt;
1382 } else {
1383 err = rhashtable_insert_fast(&priv->ct_zone_table,
1384 &zt->hash_node,
1385 nfp_zone_table_params);
1386 if (err)
1387 goto err_zone_insert;
1388 }
1389
1390 return zt;
1391
1392 err_zone_insert:
1393 rhashtable_destroy(&zt->nft_merge_tb);
1394 err_nft_merge_tb_init:
1395 rhashtable_destroy(&zt->tc_merge_tb);
1396 err_tc_merge_tb_init:
1397 kfree(zt);
1398 return ERR_PTR(err);
1399 }
1400
get_netdev_from_rule(struct flow_rule * rule)1401 static struct net_device *get_netdev_from_rule(struct flow_rule *rule)
1402 {
1403 if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_META)) {
1404 struct flow_match_meta match;
1405
1406 flow_rule_match_meta(rule, &match);
1407 if (match.key->ingress_ifindex & match.mask->ingress_ifindex)
1408 return __dev_get_by_index(&init_net,
1409 match.key->ingress_ifindex);
1410 }
1411
1412 return NULL;
1413 }
1414
nfp_nft_ct_translate_mangle_action(struct flow_action_entry * mangle_action)1415 static void nfp_nft_ct_translate_mangle_action(struct flow_action_entry *mangle_action)
1416 {
1417 if (mangle_action->id != FLOW_ACTION_MANGLE)
1418 return;
1419
1420 switch (mangle_action->mangle.htype) {
1421 case FLOW_ACT_MANGLE_HDR_TYPE_IP4:
1422 case FLOW_ACT_MANGLE_HDR_TYPE_IP6:
1423 mangle_action->mangle.val = (__force u32)cpu_to_be32(mangle_action->mangle.val);
1424 mangle_action->mangle.mask = (__force u32)cpu_to_be32(mangle_action->mangle.mask);
1425 return;
1426
1427 /* Both struct tcphdr and struct udphdr start with
1428 * __be16 source;
1429 * __be16 dest;
1430 * so we can use the same code for both.
1431 */
1432 case FLOW_ACT_MANGLE_HDR_TYPE_TCP:
1433 case FLOW_ACT_MANGLE_HDR_TYPE_UDP:
1434 if (mangle_action->mangle.offset == offsetof(struct tcphdr, source)) {
1435 mangle_action->mangle.val =
1436 (__force u32)cpu_to_be32(mangle_action->mangle.val << 16);
1437 /* The mask of mangle action is inverse mask,
1438 * so clear the dest tp port with 0xFFFF to
1439 * instead of rotate-left operation.
1440 */
1441 mangle_action->mangle.mask =
1442 (__force u32)cpu_to_be32(mangle_action->mangle.mask << 16 | 0xFFFF);
1443 }
1444 if (mangle_action->mangle.offset == offsetof(struct tcphdr, dest)) {
1445 mangle_action->mangle.offset = 0;
1446 mangle_action->mangle.val =
1447 (__force u32)cpu_to_be32(mangle_action->mangle.val);
1448 mangle_action->mangle.mask =
1449 (__force u32)cpu_to_be32(mangle_action->mangle.mask);
1450 }
1451 return;
1452
1453 default:
1454 return;
1455 }
1456 }
1457
nfp_nft_ct_set_flow_flag(struct flow_action_entry * act,struct nfp_fl_ct_flow_entry * entry)1458 static int nfp_nft_ct_set_flow_flag(struct flow_action_entry *act,
1459 struct nfp_fl_ct_flow_entry *entry)
1460 {
1461 switch (act->id) {
1462 case FLOW_ACTION_CT:
1463 if (act->ct.action == TCA_CT_ACT_NAT)
1464 entry->flags |= NFP_FL_ACTION_DO_NAT;
1465 break;
1466
1467 case FLOW_ACTION_MANGLE:
1468 entry->flags |= NFP_FL_ACTION_DO_MANGLE;
1469 break;
1470
1471 default:
1472 break;
1473 }
1474
1475 return 0;
1476 }
1477
1478 static struct
nfp_fl_ct_add_flow(struct nfp_fl_ct_zone_entry * zt,struct net_device * netdev,struct flow_cls_offload * flow,bool is_nft,struct netlink_ext_ack * extack)1479 nfp_fl_ct_flow_entry *nfp_fl_ct_add_flow(struct nfp_fl_ct_zone_entry *zt,
1480 struct net_device *netdev,
1481 struct flow_cls_offload *flow,
1482 bool is_nft, struct netlink_ext_ack *extack)
1483 {
1484 struct nf_flow_match *nft_match = NULL;
1485 struct nfp_fl_ct_flow_entry *entry;
1486 struct nfp_fl_ct_map_entry *map;
1487 struct flow_action_entry *act;
1488 int err, i;
1489
1490 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
1491 if (!entry)
1492 return ERR_PTR(-ENOMEM);
1493
1494 entry->rule = flow_rule_alloc(flow->rule->action.num_entries);
1495 if (!entry->rule) {
1496 err = -ENOMEM;
1497 goto err_pre_ct_rule;
1498 }
1499
1500 /* nft flows gets destroyed after callback return, so need
1501 * to do a full copy instead of just a reference.
1502 */
1503 if (is_nft) {
1504 nft_match = kzalloc(sizeof(*nft_match), GFP_KERNEL);
1505 if (!nft_match) {
1506 err = -ENOMEM;
1507 goto err_pre_ct_act;
1508 }
1509 memcpy(&nft_match->dissector, flow->rule->match.dissector,
1510 sizeof(nft_match->dissector));
1511 memcpy(&nft_match->mask, flow->rule->match.mask,
1512 sizeof(nft_match->mask));
1513 memcpy(&nft_match->key, flow->rule->match.key,
1514 sizeof(nft_match->key));
1515 entry->rule->match.dissector = &nft_match->dissector;
1516 entry->rule->match.mask = &nft_match->mask;
1517 entry->rule->match.key = &nft_match->key;
1518
1519 if (!netdev)
1520 netdev = get_netdev_from_rule(entry->rule);
1521 } else {
1522 entry->rule->match.dissector = flow->rule->match.dissector;
1523 entry->rule->match.mask = flow->rule->match.mask;
1524 entry->rule->match.key = flow->rule->match.key;
1525 }
1526
1527 entry->zt = zt;
1528 entry->netdev = netdev;
1529 entry->cookie = flow->cookie > 0 ? flow->cookie : (unsigned long)entry;
1530 entry->chain_index = flow->common.chain_index;
1531 entry->tun_offset = NFP_FL_CT_NO_TUN;
1532
1533 /* Copy over action data. Unfortunately we do not get a handle to the
1534 * original tcf_action data, and the flow objects gets destroyed, so we
1535 * cannot just save a pointer to this either, so need to copy over the
1536 * data unfortunately.
1537 */
1538 entry->rule->action.num_entries = flow->rule->action.num_entries;
1539 flow_action_for_each(i, act, &flow->rule->action) {
1540 struct flow_action_entry *new_act;
1541
1542 new_act = &entry->rule->action.entries[i];
1543 memcpy(new_act, act, sizeof(struct flow_action_entry));
1544 /* nft entry mangle field is host byte order, need translate to
1545 * network byte order.
1546 */
1547 if (is_nft)
1548 nfp_nft_ct_translate_mangle_action(new_act);
1549
1550 nfp_nft_ct_set_flow_flag(new_act, entry);
1551 /* Entunnel is a special case, need to allocate and copy
1552 * tunnel info.
1553 */
1554 if (act->id == FLOW_ACTION_TUNNEL_ENCAP) {
1555 struct ip_tunnel_info *tun = act->tunnel;
1556 size_t tun_size = sizeof(*tun) + tun->options_len;
1557
1558 new_act->tunnel = kmemdup(tun, tun_size, GFP_ATOMIC);
1559 if (!new_act->tunnel) {
1560 err = -ENOMEM;
1561 goto err_pre_ct_tun_cp;
1562 }
1563 entry->tun_offset = i;
1564 }
1565 }
1566
1567 INIT_LIST_HEAD(&entry->children);
1568
1569 if (flow->cookie == 0)
1570 return entry;
1571
1572 /* Now add a ct map entry to flower-priv */
1573 map = get_hashentry(&zt->priv->ct_map_table, &flow->cookie,
1574 nfp_ct_map_params, sizeof(*map));
1575 if (IS_ERR(map)) {
1576 NL_SET_ERR_MSG_MOD(extack,
1577 "offload error: ct map entry creation failed");
1578 err = -ENOMEM;
1579 goto err_ct_flow_insert;
1580 }
1581 map->cookie = flow->cookie;
1582 map->ct_entry = entry;
1583 err = rhashtable_insert_fast(&zt->priv->ct_map_table,
1584 &map->hash_node,
1585 nfp_ct_map_params);
1586 if (err) {
1587 NL_SET_ERR_MSG_MOD(extack,
1588 "offload error: ct map entry table add failed");
1589 goto err_map_insert;
1590 }
1591
1592 return entry;
1593
1594 err_map_insert:
1595 kfree(map);
1596 err_ct_flow_insert:
1597 if (entry->tun_offset != NFP_FL_CT_NO_TUN)
1598 kfree(entry->rule->action.entries[entry->tun_offset].tunnel);
1599 err_pre_ct_tun_cp:
1600 kfree(nft_match);
1601 err_pre_ct_act:
1602 kfree(entry->rule);
1603 err_pre_ct_rule:
1604 kfree(entry);
1605 return ERR_PTR(err);
1606 }
1607
cleanup_nft_merge_entry(struct nfp_fl_nft_tc_merge * m_entry)1608 static void cleanup_nft_merge_entry(struct nfp_fl_nft_tc_merge *m_entry)
1609 {
1610 struct nfp_fl_ct_zone_entry *zt;
1611 int err;
1612
1613 zt = m_entry->zt;
1614
1615 /* Flow is in HW, need to delete */
1616 if (m_entry->tc_flower_cookie) {
1617 err = nfp_fl_ct_del_offload(zt->priv->app, m_entry->tc_flower_cookie,
1618 m_entry->netdev);
1619 if (err)
1620 return;
1621 }
1622
1623 WARN_ON_ONCE(rhashtable_remove_fast(&zt->nft_merge_tb,
1624 &m_entry->hash_node,
1625 nfp_nft_ct_merge_params));
1626 zt->nft_merge_count--;
1627 list_del(&m_entry->tc_merge_list);
1628 list_del(&m_entry->nft_flow_list);
1629
1630 if (m_entry->next_pre_ct_entry) {
1631 struct nfp_fl_ct_map_entry pre_ct_map_ent;
1632
1633 pre_ct_map_ent.ct_entry = m_entry->next_pre_ct_entry;
1634 pre_ct_map_ent.cookie = 0;
1635 nfp_fl_ct_del_flow(&pre_ct_map_ent);
1636 }
1637
1638 kfree(m_entry);
1639 }
1640
nfp_free_nft_merge_children(void * entry,bool is_nft_flow)1641 static void nfp_free_nft_merge_children(void *entry, bool is_nft_flow)
1642 {
1643 struct nfp_fl_nft_tc_merge *m_entry, *tmp;
1644
1645 /* These post entries are parts of two lists, one is a list of nft_entries
1646 * and the other is of from a list of tc_merge structures. Iterate
1647 * through the relevant list and cleanup the entries.
1648 */
1649
1650 if (is_nft_flow) {
1651 /* Need to iterate through list of nft_flow entries */
1652 struct nfp_fl_ct_flow_entry *ct_entry = entry;
1653
1654 list_for_each_entry_safe(m_entry, tmp, &ct_entry->children,
1655 nft_flow_list) {
1656 cleanup_nft_merge_entry(m_entry);
1657 }
1658 } else {
1659 /* Need to iterate through list of tc_merged_flow entries */
1660 struct nfp_fl_ct_tc_merge *ct_entry = entry;
1661
1662 list_for_each_entry_safe(m_entry, tmp, &ct_entry->children,
1663 tc_merge_list) {
1664 cleanup_nft_merge_entry(m_entry);
1665 }
1666 }
1667 }
1668
nfp_del_tc_merge_entry(struct nfp_fl_ct_tc_merge * m_ent)1669 static void nfp_del_tc_merge_entry(struct nfp_fl_ct_tc_merge *m_ent)
1670 {
1671 struct nfp_fl_ct_zone_entry *zt;
1672 int err;
1673
1674 zt = m_ent->zt;
1675 err = rhashtable_remove_fast(&zt->tc_merge_tb,
1676 &m_ent->hash_node,
1677 nfp_tc_ct_merge_params);
1678 if (err)
1679 pr_warn("WARNING: could not remove merge_entry from hashtable\n");
1680 zt->tc_merge_count--;
1681 list_del(&m_ent->post_ct_list);
1682 list_del(&m_ent->pre_ct_list);
1683
1684 if (!list_empty(&m_ent->children))
1685 nfp_free_nft_merge_children(m_ent, false);
1686 kfree(m_ent);
1687 }
1688
nfp_free_tc_merge_children(struct nfp_fl_ct_flow_entry * entry)1689 static void nfp_free_tc_merge_children(struct nfp_fl_ct_flow_entry *entry)
1690 {
1691 struct nfp_fl_ct_tc_merge *m_ent, *tmp;
1692
1693 switch (entry->type) {
1694 case CT_TYPE_PRE_CT:
1695 list_for_each_entry_safe(m_ent, tmp, &entry->children, pre_ct_list) {
1696 nfp_del_tc_merge_entry(m_ent);
1697 }
1698 break;
1699 case CT_TYPE_POST_CT:
1700 list_for_each_entry_safe(m_ent, tmp, &entry->children, post_ct_list) {
1701 nfp_del_tc_merge_entry(m_ent);
1702 }
1703 break;
1704 default:
1705 break;
1706 }
1707 }
1708
nfp_fl_ct_clean_flow_entry(struct nfp_fl_ct_flow_entry * entry)1709 void nfp_fl_ct_clean_flow_entry(struct nfp_fl_ct_flow_entry *entry)
1710 {
1711 list_del(&entry->list_node);
1712
1713 if (!list_empty(&entry->children)) {
1714 if (entry->type == CT_TYPE_NFT)
1715 nfp_free_nft_merge_children(entry, true);
1716 else
1717 nfp_free_tc_merge_children(entry);
1718 }
1719
1720 if (entry->tun_offset != NFP_FL_CT_NO_TUN)
1721 kfree(entry->rule->action.entries[entry->tun_offset].tunnel);
1722
1723 if (entry->type == CT_TYPE_NFT) {
1724 struct nf_flow_match *nft_match;
1725
1726 nft_match = container_of(entry->rule->match.dissector,
1727 struct nf_flow_match, dissector);
1728 kfree(nft_match);
1729 }
1730
1731 kfree(entry->rule);
1732 kfree(entry);
1733 }
1734
get_flow_act_ct(struct flow_rule * rule)1735 static struct flow_action_entry *get_flow_act_ct(struct flow_rule *rule)
1736 {
1737 struct flow_action_entry *act;
1738 int i;
1739
1740 /* More than one ct action may be present in a flow rule,
1741 * Return the first one that is not a CT clear action
1742 */
1743 flow_action_for_each(i, act, &rule->action) {
1744 if (act->id == FLOW_ACTION_CT && act->ct.action != TCA_CT_ACT_CLEAR)
1745 return act;
1746 }
1747
1748 return NULL;
1749 }
1750
get_flow_act(struct flow_rule * rule,enum flow_action_id act_id)1751 static struct flow_action_entry *get_flow_act(struct flow_rule *rule,
1752 enum flow_action_id act_id)
1753 {
1754 struct flow_action_entry *act = NULL;
1755 int i;
1756
1757 flow_action_for_each(i, act, &rule->action) {
1758 if (act->id == act_id)
1759 return act;
1760 }
1761 return NULL;
1762 }
1763
1764 static void
nfp_ct_merge_tc_entries(struct nfp_fl_ct_flow_entry * ct_entry1,struct nfp_fl_ct_zone_entry * zt_src,struct nfp_fl_ct_zone_entry * zt_dst)1765 nfp_ct_merge_tc_entries(struct nfp_fl_ct_flow_entry *ct_entry1,
1766 struct nfp_fl_ct_zone_entry *zt_src,
1767 struct nfp_fl_ct_zone_entry *zt_dst)
1768 {
1769 struct nfp_fl_ct_flow_entry *ct_entry2, *ct_tmp;
1770 struct list_head *ct_list;
1771
1772 if (ct_entry1->type == CT_TYPE_PRE_CT)
1773 ct_list = &zt_src->post_ct_list;
1774 else if (ct_entry1->type == CT_TYPE_POST_CT)
1775 ct_list = &zt_src->pre_ct_list;
1776 else
1777 return;
1778
1779 list_for_each_entry_safe(ct_entry2, ct_tmp, ct_list,
1780 list_node) {
1781 nfp_ct_do_tc_merge(zt_dst, ct_entry2, ct_entry1);
1782 }
1783 }
1784
1785 static void
nfp_ct_merge_nft_with_tc(struct nfp_fl_ct_flow_entry * nft_entry,struct nfp_fl_ct_zone_entry * zt)1786 nfp_ct_merge_nft_with_tc(struct nfp_fl_ct_flow_entry *nft_entry,
1787 struct nfp_fl_ct_zone_entry *zt)
1788 {
1789 struct nfp_fl_ct_tc_merge *tc_merge_entry;
1790 struct rhashtable_iter iter;
1791
1792 rhashtable_walk_enter(&zt->tc_merge_tb, &iter);
1793 rhashtable_walk_start(&iter);
1794 while ((tc_merge_entry = rhashtable_walk_next(&iter)) != NULL) {
1795 if (IS_ERR(tc_merge_entry))
1796 continue;
1797 rhashtable_walk_stop(&iter);
1798 nfp_ct_do_nft_merge(zt, nft_entry, tc_merge_entry);
1799 rhashtable_walk_start(&iter);
1800 }
1801 rhashtable_walk_stop(&iter);
1802 rhashtable_walk_exit(&iter);
1803 }
1804
nfp_fl_ct_handle_pre_ct(struct nfp_flower_priv * priv,struct net_device * netdev,struct flow_cls_offload * flow,struct netlink_ext_ack * extack,struct nfp_fl_nft_tc_merge * m_entry)1805 int nfp_fl_ct_handle_pre_ct(struct nfp_flower_priv *priv,
1806 struct net_device *netdev,
1807 struct flow_cls_offload *flow,
1808 struct netlink_ext_ack *extack,
1809 struct nfp_fl_nft_tc_merge *m_entry)
1810 {
1811 struct flow_action_entry *ct_act, *ct_goto;
1812 struct nfp_fl_ct_flow_entry *ct_entry;
1813 struct nfp_fl_ct_zone_entry *zt;
1814 int err;
1815
1816 ct_act = get_flow_act_ct(flow->rule);
1817 if (!ct_act) {
1818 NL_SET_ERR_MSG_MOD(extack,
1819 "unsupported offload: Conntrack action empty in conntrack offload");
1820 return -EOPNOTSUPP;
1821 }
1822
1823 ct_goto = get_flow_act(flow->rule, FLOW_ACTION_GOTO);
1824 if (!ct_goto) {
1825 NL_SET_ERR_MSG_MOD(extack,
1826 "unsupported offload: Conntrack requires ACTION_GOTO");
1827 return -EOPNOTSUPP;
1828 }
1829
1830 zt = get_nfp_zone_entry(priv, ct_act->ct.zone, false);
1831 if (IS_ERR(zt)) {
1832 NL_SET_ERR_MSG_MOD(extack,
1833 "offload error: Could not create zone table entry");
1834 return PTR_ERR(zt);
1835 }
1836
1837 if (!zt->nft) {
1838 zt->nft = ct_act->ct.flow_table;
1839 err = nf_flow_table_offload_add_cb(zt->nft, nfp_fl_ct_handle_nft_flow, zt);
1840 if (err) {
1841 NL_SET_ERR_MSG_MOD(extack,
1842 "offload error: Could not register nft_callback");
1843 return err;
1844 }
1845 }
1846
1847 /* Add entry to pre_ct_list */
1848 ct_entry = nfp_fl_ct_add_flow(zt, netdev, flow, false, extack);
1849 if (IS_ERR(ct_entry))
1850 return PTR_ERR(ct_entry);
1851 ct_entry->type = CT_TYPE_PRE_CT;
1852 ct_entry->chain_index = flow->common.chain_index;
1853 ct_entry->goto_chain_index = ct_goto->chain_index;
1854
1855 if (m_entry) {
1856 struct nfp_fl_ct_flow_entry *pre_ct_entry;
1857 int i;
1858
1859 pre_ct_entry = m_entry->tc_m_parent->pre_ct_parent;
1860 for (i = 0; i < pre_ct_entry->num_prev_m_entries; i++)
1861 ct_entry->prev_m_entries[i] = pre_ct_entry->prev_m_entries[i];
1862 ct_entry->prev_m_entries[i++] = m_entry;
1863 ct_entry->num_prev_m_entries = i;
1864
1865 m_entry->next_pre_ct_entry = ct_entry;
1866 }
1867
1868 list_add(&ct_entry->list_node, &zt->pre_ct_list);
1869 zt->pre_ct_count++;
1870
1871 nfp_ct_merge_tc_entries(ct_entry, zt, zt);
1872
1873 /* Need to check and merge with tables in the wc_zone as well */
1874 if (priv->ct_zone_wc)
1875 nfp_ct_merge_tc_entries(ct_entry, priv->ct_zone_wc, zt);
1876
1877 return 0;
1878 }
1879
nfp_fl_ct_handle_post_ct(struct nfp_flower_priv * priv,struct net_device * netdev,struct flow_cls_offload * flow,struct netlink_ext_ack * extack)1880 int nfp_fl_ct_handle_post_ct(struct nfp_flower_priv *priv,
1881 struct net_device *netdev,
1882 struct flow_cls_offload *flow,
1883 struct netlink_ext_ack *extack)
1884 {
1885 struct flow_rule *rule = flow_cls_offload_flow_rule(flow);
1886 struct nfp_fl_ct_flow_entry *ct_entry;
1887 struct flow_action_entry *ct_goto;
1888 struct nfp_fl_ct_zone_entry *zt;
1889 struct flow_action_entry *act;
1890 bool wildcarded = false;
1891 struct flow_match_ct ct;
1892 int i;
1893
1894 flow_action_for_each(i, act, &rule->action) {
1895 switch (act->id) {
1896 case FLOW_ACTION_REDIRECT:
1897 case FLOW_ACTION_REDIRECT_INGRESS:
1898 case FLOW_ACTION_MIRRED:
1899 case FLOW_ACTION_MIRRED_INGRESS:
1900 if (act->dev->rtnl_link_ops &&
1901 !strcmp(act->dev->rtnl_link_ops->kind, "openvswitch")) {
1902 NL_SET_ERR_MSG_MOD(extack,
1903 "unsupported offload: out port is openvswitch internal port");
1904 return -EOPNOTSUPP;
1905 }
1906 break;
1907 default:
1908 break;
1909 }
1910 }
1911
1912 flow_rule_match_ct(rule, &ct);
1913 if (!ct.mask->ct_zone) {
1914 wildcarded = true;
1915 } else if (ct.mask->ct_zone != U16_MAX) {
1916 NL_SET_ERR_MSG_MOD(extack,
1917 "unsupported offload: partially wildcarded ct_zone is not supported");
1918 return -EOPNOTSUPP;
1919 }
1920
1921 zt = get_nfp_zone_entry(priv, ct.key->ct_zone, wildcarded);
1922 if (IS_ERR(zt)) {
1923 NL_SET_ERR_MSG_MOD(extack,
1924 "offload error: Could not create zone table entry");
1925 return PTR_ERR(zt);
1926 }
1927
1928 /* Add entry to post_ct_list */
1929 ct_entry = nfp_fl_ct_add_flow(zt, netdev, flow, false, extack);
1930 if (IS_ERR(ct_entry))
1931 return PTR_ERR(ct_entry);
1932
1933 ct_entry->type = CT_TYPE_POST_CT;
1934 ct_entry->chain_index = flow->common.chain_index;
1935 ct_goto = get_flow_act(flow->rule, FLOW_ACTION_GOTO);
1936 ct_entry->goto_chain_index = ct_goto ? ct_goto->chain_index : 0;
1937 list_add(&ct_entry->list_node, &zt->post_ct_list);
1938 zt->post_ct_count++;
1939
1940 if (wildcarded) {
1941 /* Iterate through all zone tables if not empty, look for merges with
1942 * pre_ct entries and merge them.
1943 */
1944 struct rhashtable_iter iter;
1945 struct nfp_fl_ct_zone_entry *zone_table;
1946
1947 rhashtable_walk_enter(&priv->ct_zone_table, &iter);
1948 rhashtable_walk_start(&iter);
1949 while ((zone_table = rhashtable_walk_next(&iter)) != NULL) {
1950 if (IS_ERR(zone_table))
1951 continue;
1952 rhashtable_walk_stop(&iter);
1953 nfp_ct_merge_tc_entries(ct_entry, zone_table, zone_table);
1954 rhashtable_walk_start(&iter);
1955 }
1956 rhashtable_walk_stop(&iter);
1957 rhashtable_walk_exit(&iter);
1958 } else {
1959 nfp_ct_merge_tc_entries(ct_entry, zt, zt);
1960 }
1961
1962 return 0;
1963 }
1964
nfp_fl_create_new_pre_ct(struct nfp_fl_nft_tc_merge * m_entry)1965 int nfp_fl_create_new_pre_ct(struct nfp_fl_nft_tc_merge *m_entry)
1966 {
1967 struct nfp_fl_ct_flow_entry *pre_ct_entry, *post_ct_entry;
1968 struct flow_cls_offload new_pre_ct_flow;
1969 int err;
1970
1971 pre_ct_entry = m_entry->tc_m_parent->pre_ct_parent;
1972 if (pre_ct_entry->num_prev_m_entries >= NFP_MAX_RECIRC_CT_ZONES - 1)
1973 return -1;
1974
1975 post_ct_entry = m_entry->tc_m_parent->post_ct_parent;
1976 memset(&new_pre_ct_flow, 0, sizeof(struct flow_cls_offload));
1977 new_pre_ct_flow.rule = post_ct_entry->rule;
1978 new_pre_ct_flow.common.chain_index = post_ct_entry->chain_index;
1979
1980 err = nfp_fl_ct_handle_pre_ct(pre_ct_entry->zt->priv,
1981 pre_ct_entry->netdev,
1982 &new_pre_ct_flow, NULL,
1983 m_entry);
1984 return err;
1985 }
1986
1987 static void
nfp_fl_ct_sub_stats(struct nfp_fl_nft_tc_merge * nft_merge,enum ct_entry_type type,u64 * m_pkts,u64 * m_bytes,u64 * m_used)1988 nfp_fl_ct_sub_stats(struct nfp_fl_nft_tc_merge *nft_merge,
1989 enum ct_entry_type type, u64 *m_pkts,
1990 u64 *m_bytes, u64 *m_used)
1991 {
1992 struct nfp_flower_priv *priv = nft_merge->zt->priv;
1993 struct nfp_fl_payload *nfp_flow;
1994 u32 ctx_id;
1995
1996 nfp_flow = nft_merge->flow_pay;
1997 if (!nfp_flow)
1998 return;
1999
2000 ctx_id = be32_to_cpu(nfp_flow->meta.host_ctx_id);
2001 *m_pkts += priv->stats[ctx_id].pkts;
2002 *m_bytes += priv->stats[ctx_id].bytes;
2003 *m_used = max_t(u64, *m_used, priv->stats[ctx_id].used);
2004
2005 /* If request is for a sub_flow which is part of a tunnel merged
2006 * flow then update stats from tunnel merged flows first.
2007 */
2008 if (!list_empty(&nfp_flow->linked_flows))
2009 nfp_flower_update_merge_stats(priv->app, nfp_flow);
2010
2011 if (type != CT_TYPE_NFT) {
2012 /* Update nft cached stats */
2013 flow_stats_update(&nft_merge->nft_parent->stats,
2014 priv->stats[ctx_id].bytes,
2015 priv->stats[ctx_id].pkts,
2016 0, priv->stats[ctx_id].used,
2017 FLOW_ACTION_HW_STATS_DELAYED);
2018 } else {
2019 /* Update pre_ct cached stats */
2020 flow_stats_update(&nft_merge->tc_m_parent->pre_ct_parent->stats,
2021 priv->stats[ctx_id].bytes,
2022 priv->stats[ctx_id].pkts,
2023 0, priv->stats[ctx_id].used,
2024 FLOW_ACTION_HW_STATS_DELAYED);
2025 /* Update post_ct cached stats */
2026 flow_stats_update(&nft_merge->tc_m_parent->post_ct_parent->stats,
2027 priv->stats[ctx_id].bytes,
2028 priv->stats[ctx_id].pkts,
2029 0, priv->stats[ctx_id].used,
2030 FLOW_ACTION_HW_STATS_DELAYED);
2031 }
2032
2033 /* Update previous pre_ct/post_ct/nft flow stats */
2034 if (nft_merge->tc_m_parent->pre_ct_parent->num_prev_m_entries > 0) {
2035 struct nfp_fl_nft_tc_merge *tmp_nft_merge;
2036 int i;
2037
2038 for (i = 0; i < nft_merge->tc_m_parent->pre_ct_parent->num_prev_m_entries; i++) {
2039 tmp_nft_merge = nft_merge->tc_m_parent->pre_ct_parent->prev_m_entries[i];
2040 flow_stats_update(&tmp_nft_merge->tc_m_parent->pre_ct_parent->stats,
2041 priv->stats[ctx_id].bytes,
2042 priv->stats[ctx_id].pkts,
2043 0, priv->stats[ctx_id].used,
2044 FLOW_ACTION_HW_STATS_DELAYED);
2045 flow_stats_update(&tmp_nft_merge->tc_m_parent->post_ct_parent->stats,
2046 priv->stats[ctx_id].bytes,
2047 priv->stats[ctx_id].pkts,
2048 0, priv->stats[ctx_id].used,
2049 FLOW_ACTION_HW_STATS_DELAYED);
2050 flow_stats_update(&tmp_nft_merge->nft_parent->stats,
2051 priv->stats[ctx_id].bytes,
2052 priv->stats[ctx_id].pkts,
2053 0, priv->stats[ctx_id].used,
2054 FLOW_ACTION_HW_STATS_DELAYED);
2055 }
2056 }
2057
2058 /* Reset stats from the nfp */
2059 priv->stats[ctx_id].pkts = 0;
2060 priv->stats[ctx_id].bytes = 0;
2061 }
2062
nfp_fl_ct_stats(struct flow_cls_offload * flow,struct nfp_fl_ct_map_entry * ct_map_ent)2063 int nfp_fl_ct_stats(struct flow_cls_offload *flow,
2064 struct nfp_fl_ct_map_entry *ct_map_ent)
2065 {
2066 struct nfp_fl_ct_flow_entry *ct_entry = ct_map_ent->ct_entry;
2067 struct nfp_fl_nft_tc_merge *nft_merge, *nft_m_tmp;
2068 struct nfp_fl_ct_tc_merge *tc_merge, *tc_m_tmp;
2069
2070 u64 pkts = 0, bytes = 0, used = 0;
2071 u64 m_pkts, m_bytes, m_used;
2072
2073 spin_lock_bh(&ct_entry->zt->priv->stats_lock);
2074
2075 if (ct_entry->type == CT_TYPE_PRE_CT) {
2076 /* Iterate tc_merge entries associated with this flow */
2077 list_for_each_entry_safe(tc_merge, tc_m_tmp, &ct_entry->children,
2078 pre_ct_list) {
2079 m_pkts = 0;
2080 m_bytes = 0;
2081 m_used = 0;
2082 /* Iterate nft_merge entries associated with this tc_merge flow */
2083 list_for_each_entry_safe(nft_merge, nft_m_tmp, &tc_merge->children,
2084 tc_merge_list) {
2085 nfp_fl_ct_sub_stats(nft_merge, CT_TYPE_PRE_CT,
2086 &m_pkts, &m_bytes, &m_used);
2087 }
2088 pkts += m_pkts;
2089 bytes += m_bytes;
2090 used = max_t(u64, used, m_used);
2091 /* Update post_ct partner */
2092 flow_stats_update(&tc_merge->post_ct_parent->stats,
2093 m_bytes, m_pkts, 0, m_used,
2094 FLOW_ACTION_HW_STATS_DELAYED);
2095 }
2096 } else if (ct_entry->type == CT_TYPE_POST_CT) {
2097 /* Iterate tc_merge entries associated with this flow */
2098 list_for_each_entry_safe(tc_merge, tc_m_tmp, &ct_entry->children,
2099 post_ct_list) {
2100 m_pkts = 0;
2101 m_bytes = 0;
2102 m_used = 0;
2103 /* Iterate nft_merge entries associated with this tc_merge flow */
2104 list_for_each_entry_safe(nft_merge, nft_m_tmp, &tc_merge->children,
2105 tc_merge_list) {
2106 nfp_fl_ct_sub_stats(nft_merge, CT_TYPE_POST_CT,
2107 &m_pkts, &m_bytes, &m_used);
2108 }
2109 pkts += m_pkts;
2110 bytes += m_bytes;
2111 used = max_t(u64, used, m_used);
2112 /* Update pre_ct partner */
2113 flow_stats_update(&tc_merge->pre_ct_parent->stats,
2114 m_bytes, m_pkts, 0, m_used,
2115 FLOW_ACTION_HW_STATS_DELAYED);
2116 }
2117 } else {
2118 /* Iterate nft_merge entries associated with this nft flow */
2119 list_for_each_entry_safe(nft_merge, nft_m_tmp, &ct_entry->children,
2120 nft_flow_list) {
2121 nfp_fl_ct_sub_stats(nft_merge, CT_TYPE_NFT,
2122 &pkts, &bytes, &used);
2123 }
2124 }
2125
2126 /* Add stats from this request to stats potentially cached by
2127 * previous requests.
2128 */
2129 flow_stats_update(&ct_entry->stats, bytes, pkts, 0, used,
2130 FLOW_ACTION_HW_STATS_DELAYED);
2131 /* Finally update the flow stats from the original stats request */
2132 flow_stats_update(&flow->stats, ct_entry->stats.bytes,
2133 ct_entry->stats.pkts, 0,
2134 ct_entry->stats.lastused,
2135 FLOW_ACTION_HW_STATS_DELAYED);
2136 /* Stats has been synced to original flow, can now clear
2137 * the cache.
2138 */
2139 ct_entry->stats.pkts = 0;
2140 ct_entry->stats.bytes = 0;
2141 spin_unlock_bh(&ct_entry->zt->priv->stats_lock);
2142
2143 return 0;
2144 }
2145
2146 static bool
nfp_fl_ct_offload_nft_supported(struct flow_cls_offload * flow)2147 nfp_fl_ct_offload_nft_supported(struct flow_cls_offload *flow)
2148 {
2149 struct flow_rule *flow_rule = flow->rule;
2150 struct flow_action *flow_action =
2151 &flow_rule->action;
2152 struct flow_action_entry *act;
2153 int i;
2154
2155 flow_action_for_each(i, act, flow_action) {
2156 if (act->id == FLOW_ACTION_CT_METADATA) {
2157 enum ip_conntrack_info ctinfo =
2158 act->ct_metadata.cookie & NFCT_INFOMASK;
2159
2160 return ctinfo != IP_CT_NEW;
2161 }
2162 }
2163
2164 return false;
2165 }
2166
2167 static int
nfp_fl_ct_offload_nft_flow(struct nfp_fl_ct_zone_entry * zt,struct flow_cls_offload * flow)2168 nfp_fl_ct_offload_nft_flow(struct nfp_fl_ct_zone_entry *zt, struct flow_cls_offload *flow)
2169 {
2170 struct nfp_fl_ct_map_entry *ct_map_ent;
2171 struct nfp_fl_ct_flow_entry *ct_entry;
2172 struct netlink_ext_ack *extack = NULL;
2173
2174 extack = flow->common.extack;
2175 switch (flow->command) {
2176 case FLOW_CLS_REPLACE:
2177 if (!nfp_fl_ct_offload_nft_supported(flow))
2178 return -EOPNOTSUPP;
2179
2180 /* Netfilter can request offload multiple times for the same
2181 * flow - protect against adding duplicates.
2182 */
2183 ct_map_ent = rhashtable_lookup_fast(&zt->priv->ct_map_table, &flow->cookie,
2184 nfp_ct_map_params);
2185 if (!ct_map_ent) {
2186 ct_entry = nfp_fl_ct_add_flow(zt, NULL, flow, true, extack);
2187 if (IS_ERR(ct_entry))
2188 return PTR_ERR(ct_entry);
2189 ct_entry->type = CT_TYPE_NFT;
2190 list_add(&ct_entry->list_node, &zt->nft_flows_list);
2191 zt->nft_flows_count++;
2192 nfp_ct_merge_nft_with_tc(ct_entry, zt);
2193 }
2194 return 0;
2195 case FLOW_CLS_DESTROY:
2196 ct_map_ent = rhashtable_lookup_fast(&zt->priv->ct_map_table, &flow->cookie,
2197 nfp_ct_map_params);
2198 return nfp_fl_ct_del_flow(ct_map_ent);
2199 case FLOW_CLS_STATS:
2200 ct_map_ent = rhashtable_lookup_fast(&zt->priv->ct_map_table, &flow->cookie,
2201 nfp_ct_map_params);
2202 if (ct_map_ent)
2203 return nfp_fl_ct_stats(flow, ct_map_ent);
2204 break;
2205 default:
2206 break;
2207 }
2208 return -EINVAL;
2209 }
2210
nfp_fl_ct_handle_nft_flow(enum tc_setup_type type,void * type_data,void * cb_priv)2211 int nfp_fl_ct_handle_nft_flow(enum tc_setup_type type, void *type_data, void *cb_priv)
2212 {
2213 struct flow_cls_offload *flow = type_data;
2214 struct nfp_fl_ct_zone_entry *zt = cb_priv;
2215 int err = -EOPNOTSUPP;
2216
2217 switch (type) {
2218 case TC_SETUP_CLSFLOWER:
2219 while (!mutex_trylock(&zt->priv->nfp_fl_lock)) {
2220 if (!zt->nft) /* avoid deadlock */
2221 return err;
2222 msleep(20);
2223 }
2224 err = nfp_fl_ct_offload_nft_flow(zt, flow);
2225 mutex_unlock(&zt->priv->nfp_fl_lock);
2226 break;
2227 default:
2228 return -EOPNOTSUPP;
2229 }
2230 return err;
2231 }
2232
2233 static void
nfp_fl_ct_clean_nft_entries(struct nfp_fl_ct_zone_entry * zt)2234 nfp_fl_ct_clean_nft_entries(struct nfp_fl_ct_zone_entry *zt)
2235 {
2236 struct nfp_fl_ct_flow_entry *nft_entry, *ct_tmp;
2237 struct nfp_fl_ct_map_entry *ct_map_ent;
2238
2239 list_for_each_entry_safe(nft_entry, ct_tmp, &zt->nft_flows_list,
2240 list_node) {
2241 ct_map_ent = rhashtable_lookup_fast(&zt->priv->ct_map_table,
2242 &nft_entry->cookie,
2243 nfp_ct_map_params);
2244 nfp_fl_ct_del_flow(ct_map_ent);
2245 }
2246 }
2247
nfp_fl_ct_del_flow(struct nfp_fl_ct_map_entry * ct_map_ent)2248 int nfp_fl_ct_del_flow(struct nfp_fl_ct_map_entry *ct_map_ent)
2249 {
2250 struct nfp_fl_ct_flow_entry *ct_entry;
2251 struct nfp_fl_ct_zone_entry *zt;
2252 struct rhashtable *m_table;
2253 struct nf_flowtable *nft;
2254
2255 if (!ct_map_ent)
2256 return -ENOENT;
2257
2258 zt = ct_map_ent->ct_entry->zt;
2259 ct_entry = ct_map_ent->ct_entry;
2260 m_table = &zt->priv->ct_map_table;
2261
2262 switch (ct_entry->type) {
2263 case CT_TYPE_PRE_CT:
2264 zt->pre_ct_count--;
2265 if (ct_map_ent->cookie > 0)
2266 rhashtable_remove_fast(m_table, &ct_map_ent->hash_node,
2267 nfp_ct_map_params);
2268 nfp_fl_ct_clean_flow_entry(ct_entry);
2269 if (ct_map_ent->cookie > 0)
2270 kfree(ct_map_ent);
2271
2272 if (!zt->pre_ct_count && zt->nft) {
2273 nft = zt->nft;
2274 zt->nft = NULL; /* avoid deadlock */
2275 nf_flow_table_offload_del_cb(nft,
2276 nfp_fl_ct_handle_nft_flow,
2277 zt);
2278 nfp_fl_ct_clean_nft_entries(zt);
2279 }
2280 break;
2281 case CT_TYPE_POST_CT:
2282 zt->post_ct_count--;
2283 rhashtable_remove_fast(m_table, &ct_map_ent->hash_node,
2284 nfp_ct_map_params);
2285 nfp_fl_ct_clean_flow_entry(ct_entry);
2286 kfree(ct_map_ent);
2287 break;
2288 case CT_TYPE_NFT:
2289 zt->nft_flows_count--;
2290 rhashtable_remove_fast(m_table, &ct_map_ent->hash_node,
2291 nfp_ct_map_params);
2292 nfp_fl_ct_clean_flow_entry(ct_map_ent->ct_entry);
2293 kfree(ct_map_ent);
2294 break;
2295 default:
2296 break;
2297 }
2298
2299 return 0;
2300 }
2301