1#include <linux/kernel.h>
2#include <linux/init.h>
3#include <linux/module.h>
4#include <linux/netfilter.h>
5#include <linux/rhashtable.h>
6#include <linux/netdevice.h>
7#include <linux/tc_act/tc_csum.h>
8#include <net/flow_offload.h>
9#include <net/netfilter/nf_flow_table.h>
10#include <net/netfilter/nf_tables.h>
11#include <net/netfilter/nf_conntrack.h>
12#include <net/netfilter/nf_conntrack_acct.h>
13#include <net/netfilter/nf_conntrack_core.h>
14#include <net/netfilter/nf_conntrack_tuple.h>
15
16static struct workqueue_struct *nf_flow_offload_add_wq;
17static struct workqueue_struct *nf_flow_offload_del_wq;
18static struct workqueue_struct *nf_flow_offload_stats_wq;
19
20struct flow_offload_work {
21 struct list_head list;
22 enum flow_cls_command cmd;
23 struct nf_flowtable *flowtable;
24 struct flow_offload *flow;
25 struct work_struct work;
26};
27
28#define NF_FLOW_DISSECTOR(__match, __type, __field) \
29 (__match)->dissector.offset[__type] = \
30 offsetof(struct nf_flow_key, __field)
31
32static void nf_flow_rule_lwt_match(struct nf_flow_match *match,
33 struct ip_tunnel_info *tun_info)
34{
35 struct nf_flow_key *mask = &match->mask;
36 struct nf_flow_key *key = &match->key;
37 unsigned long long enc_keys;
38
39 if (!tun_info || !(tun_info->mode & IP_TUNNEL_INFO_TX))
40 return;
41
42 NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_ENC_CONTROL, enc_control);
43 NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id);
44 key->enc_key_id.keyid = tunnel_id_to_key32(tun_id: tun_info->key.tun_id);
45 mask->enc_key_id.keyid = 0xffffffff;
46 enc_keys = BIT_ULL(FLOW_DISSECTOR_KEY_ENC_KEYID) |
47 BIT_ULL(FLOW_DISSECTOR_KEY_ENC_CONTROL);
48
49 if (ip_tunnel_info_af(tun_info) == AF_INET) {
50 NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS,
51 enc_ipv4);
52 key->enc_ipv4.src = tun_info->key.u.ipv4.dst;
53 key->enc_ipv4.dst = tun_info->key.u.ipv4.src;
54 if (key->enc_ipv4.src)
55 mask->enc_ipv4.src = 0xffffffff;
56 if (key->enc_ipv4.dst)
57 mask->enc_ipv4.dst = 0xffffffff;
58 enc_keys |= BIT_ULL(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS);
59 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
60 } else {
61 memcpy(&key->enc_ipv6.src, &tun_info->key.u.ipv6.dst,
62 sizeof(struct in6_addr));
63 memcpy(&key->enc_ipv6.dst, &tun_info->key.u.ipv6.src,
64 sizeof(struct in6_addr));
65 if (memcmp(p: &key->enc_ipv6.src, q: &in6addr_any,
66 size: sizeof(struct in6_addr)))
67 memset(&mask->enc_ipv6.src, 0xff,
68 sizeof(struct in6_addr));
69 if (memcmp(p: &key->enc_ipv6.dst, q: &in6addr_any,
70 size: sizeof(struct in6_addr)))
71 memset(&mask->enc_ipv6.dst, 0xff,
72 sizeof(struct in6_addr));
73 enc_keys |= BIT_ULL(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS);
74 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
75 }
76
77 match->dissector.used_keys |= enc_keys;
78}
79
80static void nf_flow_rule_vlan_match(struct flow_dissector_key_vlan *key,
81 struct flow_dissector_key_vlan *mask,
82 u16 vlan_id, __be16 proto)
83{
84 key->vlan_id = vlan_id;
85 mask->vlan_id = VLAN_VID_MASK;
86 key->vlan_tpid = proto;
87 mask->vlan_tpid = 0xffff;
88}
89
90static int nf_flow_rule_match(struct nf_flow_match *match,
91 const struct flow_offload_tuple *tuple,
92 struct dst_entry *other_dst)
93{
94 struct nf_flow_key *mask = &match->mask;
95 struct nf_flow_key *key = &match->key;
96 struct ip_tunnel_info *tun_info;
97 bool vlan_encap = false;
98
99 NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_META, meta);
100 NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_CONTROL, control);
101 NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_BASIC, basic);
102 NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
103 NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
104 NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_TCP, tcp);
105 NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_PORTS, tp);
106
107 if (other_dst && other_dst->lwtstate) {
108 tun_info = lwt_tun_info(lwtstate: other_dst->lwtstate);
109 nf_flow_rule_lwt_match(match, tun_info);
110 }
111
112 if (tuple->xmit_type == FLOW_OFFLOAD_XMIT_TC)
113 key->meta.ingress_ifindex = tuple->tc.iifidx;
114 else
115 key->meta.ingress_ifindex = tuple->iifidx;
116
117 mask->meta.ingress_ifindex = 0xffffffff;
118
119 if (tuple->encap_num > 0 && !(tuple->in_vlan_ingress & BIT(0)) &&
120 tuple->encap[0].proto == htons(ETH_P_8021Q)) {
121 NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_VLAN, vlan);
122 nf_flow_rule_vlan_match(key: &key->vlan, mask: &mask->vlan,
123 vlan_id: tuple->encap[0].id,
124 proto: tuple->encap[0].proto);
125 vlan_encap = true;
126 }
127
128 if (tuple->encap_num > 1 && !(tuple->in_vlan_ingress & BIT(1)) &&
129 tuple->encap[1].proto == htons(ETH_P_8021Q)) {
130 if (vlan_encap) {
131 NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_CVLAN,
132 cvlan);
133 nf_flow_rule_vlan_match(key: &key->cvlan, mask: &mask->cvlan,
134 vlan_id: tuple->encap[1].id,
135 proto: tuple->encap[1].proto);
136 } else {
137 NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_VLAN,
138 vlan);
139 nf_flow_rule_vlan_match(key: &key->vlan, mask: &mask->vlan,
140 vlan_id: tuple->encap[1].id,
141 proto: tuple->encap[1].proto);
142 }
143 }
144
145 switch (tuple->l3proto) {
146 case AF_INET:
147 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
148 key->basic.n_proto = htons(ETH_P_IP);
149 key->ipv4.src = tuple->src_v4.s_addr;
150 mask->ipv4.src = 0xffffffff;
151 key->ipv4.dst = tuple->dst_v4.s_addr;
152 mask->ipv4.dst = 0xffffffff;
153 break;
154 case AF_INET6:
155 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
156 key->basic.n_proto = htons(ETH_P_IPV6);
157 key->ipv6.src = tuple->src_v6;
158 memset(&mask->ipv6.src, 0xff, sizeof(mask->ipv6.src));
159 key->ipv6.dst = tuple->dst_v6;
160 memset(&mask->ipv6.dst, 0xff, sizeof(mask->ipv6.dst));
161 break;
162 default:
163 return -EOPNOTSUPP;
164 }
165 mask->control.addr_type = 0xffff;
166 match->dissector.used_keys |= BIT_ULL(key->control.addr_type);
167 mask->basic.n_proto = 0xffff;
168
169 switch (tuple->l4proto) {
170 case IPPROTO_TCP:
171 key->tcp.flags = 0;
172 mask->tcp.flags = cpu_to_be16(be32_to_cpu(TCP_FLAG_RST | TCP_FLAG_FIN) >> 16);
173 match->dissector.used_keys |= BIT_ULL(FLOW_DISSECTOR_KEY_TCP);
174 break;
175 case IPPROTO_UDP:
176 case IPPROTO_GRE:
177 break;
178 default:
179 return -EOPNOTSUPP;
180 }
181
182 key->basic.ip_proto = tuple->l4proto;
183 mask->basic.ip_proto = 0xff;
184
185 match->dissector.used_keys |= BIT_ULL(FLOW_DISSECTOR_KEY_META) |
186 BIT_ULL(FLOW_DISSECTOR_KEY_CONTROL) |
187 BIT_ULL(FLOW_DISSECTOR_KEY_BASIC);
188
189 switch (tuple->l4proto) {
190 case IPPROTO_TCP:
191 case IPPROTO_UDP:
192 key->tp.src = tuple->src_port;
193 mask->tp.src = 0xffff;
194 key->tp.dst = tuple->dst_port;
195 mask->tp.dst = 0xffff;
196
197 match->dissector.used_keys |= BIT_ULL(FLOW_DISSECTOR_KEY_PORTS);
198 break;
199 }
200
201 return 0;
202}
203
204static void flow_offload_mangle(struct flow_action_entry *entry,
205 enum flow_action_mangle_base htype, u32 offset,
206 const __be32 *value, const __be32 *mask)
207{
208 entry->id = FLOW_ACTION_MANGLE;
209 entry->mangle.htype = htype;
210 entry->mangle.offset = offset;
211 memcpy(&entry->mangle.mask, mask, sizeof(u32));
212 memcpy(&entry->mangle.val, value, sizeof(u32));
213}
214
215static inline struct flow_action_entry *
216flow_action_entry_next(struct nf_flow_rule *flow_rule)
217{
218 int i = flow_rule->rule->action.num_entries++;
219
220 return &flow_rule->rule->action.entries[i];
221}
222
223static int flow_offload_eth_src(struct net *net,
224 const struct flow_offload *flow,
225 enum flow_offload_tuple_dir dir,
226 struct nf_flow_rule *flow_rule)
227{
228 struct flow_action_entry *entry0 = flow_action_entry_next(flow_rule);
229 struct flow_action_entry *entry1 = flow_action_entry_next(flow_rule);
230 const struct flow_offload_tuple *other_tuple, *this_tuple;
231 struct net_device *dev = NULL;
232 const unsigned char *addr;
233 u32 mask, val;
234 u16 val16;
235
236 this_tuple = &flow->tuplehash[dir].tuple;
237
238 switch (this_tuple->xmit_type) {
239 case FLOW_OFFLOAD_XMIT_DIRECT:
240 addr = this_tuple->out.h_source;
241 break;
242 case FLOW_OFFLOAD_XMIT_NEIGH:
243 other_tuple = &flow->tuplehash[!dir].tuple;
244 dev = dev_get_by_index(net, ifindex: other_tuple->iifidx);
245 if (!dev)
246 return -ENOENT;
247
248 addr = dev->dev_addr;
249 break;
250 default:
251 return -EOPNOTSUPP;
252 }
253
254 mask = ~0xffff0000;
255 memcpy(&val16, addr, 2);
256 val = val16 << 16;
257 flow_offload_mangle(entry: entry0, htype: FLOW_ACT_MANGLE_HDR_TYPE_ETH, offset: 4,
258 value: &val, mask: &mask);
259
260 mask = ~0xffffffff;
261 memcpy(&val, addr + 2, 4);
262 flow_offload_mangle(entry: entry1, htype: FLOW_ACT_MANGLE_HDR_TYPE_ETH, offset: 8,
263 value: &val, mask: &mask);
264
265 dev_put(dev);
266
267 return 0;
268}
269
270static int flow_offload_eth_dst(struct net *net,
271 const struct flow_offload *flow,
272 enum flow_offload_tuple_dir dir,
273 struct nf_flow_rule *flow_rule)
274{
275 struct flow_action_entry *entry0 = flow_action_entry_next(flow_rule);
276 struct flow_action_entry *entry1 = flow_action_entry_next(flow_rule);
277 const struct flow_offload_tuple *other_tuple, *this_tuple;
278 const struct dst_entry *dst_cache;
279 unsigned char ha[ETH_ALEN];
280 struct neighbour *n;
281 const void *daddr;
282 u32 mask, val;
283 u8 nud_state;
284 u16 val16;
285
286 this_tuple = &flow->tuplehash[dir].tuple;
287
288 switch (this_tuple->xmit_type) {
289 case FLOW_OFFLOAD_XMIT_DIRECT:
290 ether_addr_copy(dst: ha, src: this_tuple->out.h_dest);
291 break;
292 case FLOW_OFFLOAD_XMIT_NEIGH:
293 other_tuple = &flow->tuplehash[!dir].tuple;
294 daddr = &other_tuple->src_v4;
295 dst_cache = this_tuple->dst_cache;
296 n = dst_neigh_lookup(dst: dst_cache, daddr);
297 if (!n)
298 return -ENOENT;
299
300 read_lock_bh(&n->lock);
301 nud_state = n->nud_state;
302 ether_addr_copy(dst: ha, src: n->ha);
303 read_unlock_bh(&n->lock);
304 neigh_release(neigh: n);
305
306 if (!(nud_state & NUD_VALID))
307 return -ENOENT;
308 break;
309 default:
310 return -EOPNOTSUPP;
311 }
312
313 mask = ~0xffffffff;
314 memcpy(&val, ha, 4);
315 flow_offload_mangle(entry: entry0, htype: FLOW_ACT_MANGLE_HDR_TYPE_ETH, offset: 0,
316 value: &val, mask: &mask);
317
318 mask = ~0x0000ffff;
319 memcpy(&val16, ha + 4, 2);
320 val = val16;
321 flow_offload_mangle(entry: entry1, htype: FLOW_ACT_MANGLE_HDR_TYPE_ETH, offset: 4,
322 value: &val, mask: &mask);
323
324 return 0;
325}
326
327static void flow_offload_ipv4_snat(struct net *net,
328 const struct flow_offload *flow,
329 enum flow_offload_tuple_dir dir,
330 struct nf_flow_rule *flow_rule)
331{
332 struct flow_action_entry *entry = flow_action_entry_next(flow_rule);
333 u32 mask = ~htonl(0xffffffff);
334 __be32 addr;
335 u32 offset;
336
337 switch (dir) {
338 case FLOW_OFFLOAD_DIR_ORIGINAL:
339 addr = flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.dst_v4.s_addr;
340 offset = offsetof(struct iphdr, saddr);
341 break;
342 case FLOW_OFFLOAD_DIR_REPLY:
343 addr = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.src_v4.s_addr;
344 offset = offsetof(struct iphdr, daddr);
345 break;
346 default:
347 return;
348 }
349
350 flow_offload_mangle(entry, htype: FLOW_ACT_MANGLE_HDR_TYPE_IP4, offset,
351 value: &addr, mask: &mask);
352}
353
354static void flow_offload_ipv4_dnat(struct net *net,
355 const struct flow_offload *flow,
356 enum flow_offload_tuple_dir dir,
357 struct nf_flow_rule *flow_rule)
358{
359 struct flow_action_entry *entry = flow_action_entry_next(flow_rule);
360 u32 mask = ~htonl(0xffffffff);
361 __be32 addr;
362 u32 offset;
363
364 switch (dir) {
365 case FLOW_OFFLOAD_DIR_ORIGINAL:
366 addr = flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.src_v4.s_addr;
367 offset = offsetof(struct iphdr, daddr);
368 break;
369 case FLOW_OFFLOAD_DIR_REPLY:
370 addr = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.dst_v4.s_addr;
371 offset = offsetof(struct iphdr, saddr);
372 break;
373 default:
374 return;
375 }
376
377 flow_offload_mangle(entry, htype: FLOW_ACT_MANGLE_HDR_TYPE_IP4, offset,
378 value: &addr, mask: &mask);
379}
380
381static void flow_offload_ipv6_mangle(struct nf_flow_rule *flow_rule,
382 unsigned int offset,
383 const __be32 *addr, const __be32 *mask)
384{
385 struct flow_action_entry *entry;
386 int i;
387
388 for (i = 0; i < sizeof(struct in6_addr) / sizeof(u32); i++) {
389 entry = flow_action_entry_next(flow_rule);
390 flow_offload_mangle(entry, htype: FLOW_ACT_MANGLE_HDR_TYPE_IP6,
391 offset: offset + i * sizeof(u32), value: &addr[i], mask);
392 }
393}
394
395static void flow_offload_ipv6_snat(struct net *net,
396 const struct flow_offload *flow,
397 enum flow_offload_tuple_dir dir,
398 struct nf_flow_rule *flow_rule)
399{
400 u32 mask = ~htonl(0xffffffff);
401 const __be32 *addr;
402 u32 offset;
403
404 switch (dir) {
405 case FLOW_OFFLOAD_DIR_ORIGINAL:
406 addr = flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.dst_v6.s6_addr32;
407 offset = offsetof(struct ipv6hdr, saddr);
408 break;
409 case FLOW_OFFLOAD_DIR_REPLY:
410 addr = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.src_v6.s6_addr32;
411 offset = offsetof(struct ipv6hdr, daddr);
412 break;
413 default:
414 return;
415 }
416
417 flow_offload_ipv6_mangle(flow_rule, offset, addr, mask: &mask);
418}
419
420static void flow_offload_ipv6_dnat(struct net *net,
421 const struct flow_offload *flow,
422 enum flow_offload_tuple_dir dir,
423 struct nf_flow_rule *flow_rule)
424{
425 u32 mask = ~htonl(0xffffffff);
426 const __be32 *addr;
427 u32 offset;
428
429 switch (dir) {
430 case FLOW_OFFLOAD_DIR_ORIGINAL:
431 addr = flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.src_v6.s6_addr32;
432 offset = offsetof(struct ipv6hdr, daddr);
433 break;
434 case FLOW_OFFLOAD_DIR_REPLY:
435 addr = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.dst_v6.s6_addr32;
436 offset = offsetof(struct ipv6hdr, saddr);
437 break;
438 default:
439 return;
440 }
441
442 flow_offload_ipv6_mangle(flow_rule, offset, addr, mask: &mask);
443}
444
445static int flow_offload_l4proto(const struct flow_offload *flow)
446{
447 u8 protonum = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.l4proto;
448 u8 type = 0;
449
450 switch (protonum) {
451 case IPPROTO_TCP:
452 type = FLOW_ACT_MANGLE_HDR_TYPE_TCP;
453 break;
454 case IPPROTO_UDP:
455 type = FLOW_ACT_MANGLE_HDR_TYPE_UDP;
456 break;
457 default:
458 break;
459 }
460
461 return type;
462}
463
464static void flow_offload_port_snat(struct net *net,
465 const struct flow_offload *flow,
466 enum flow_offload_tuple_dir dir,
467 struct nf_flow_rule *flow_rule)
468{
469 struct flow_action_entry *entry = flow_action_entry_next(flow_rule);
470 u32 mask, port;
471 u32 offset;
472
473 switch (dir) {
474 case FLOW_OFFLOAD_DIR_ORIGINAL:
475 port = ntohs(flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.dst_port);
476 offset = 0; /* offsetof(struct tcphdr, source); */
477 port = htonl(port << 16);
478 mask = ~htonl(0xffff0000);
479 break;
480 case FLOW_OFFLOAD_DIR_REPLY:
481 port = ntohs(flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.src_port);
482 offset = 0; /* offsetof(struct tcphdr, dest); */
483 port = htonl(port);
484 mask = ~htonl(0xffff);
485 break;
486 default:
487 return;
488 }
489
490 flow_offload_mangle(entry, htype: flow_offload_l4proto(flow), offset,
491 value: &port, mask: &mask);
492}
493
494static void flow_offload_port_dnat(struct net *net,
495 const struct flow_offload *flow,
496 enum flow_offload_tuple_dir dir,
497 struct nf_flow_rule *flow_rule)
498{
499 struct flow_action_entry *entry = flow_action_entry_next(flow_rule);
500 u32 mask, port;
501 u32 offset;
502
503 switch (dir) {
504 case FLOW_OFFLOAD_DIR_ORIGINAL:
505 port = ntohs(flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.src_port);
506 offset = 0; /* offsetof(struct tcphdr, dest); */
507 port = htonl(port);
508 mask = ~htonl(0xffff);
509 break;
510 case FLOW_OFFLOAD_DIR_REPLY:
511 port = ntohs(flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.dst_port);
512 offset = 0; /* offsetof(struct tcphdr, source); */
513 port = htonl(port << 16);
514 mask = ~htonl(0xffff0000);
515 break;
516 default:
517 return;
518 }
519
520 flow_offload_mangle(entry, htype: flow_offload_l4proto(flow), offset,
521 value: &port, mask: &mask);
522}
523
524static void flow_offload_ipv4_checksum(struct net *net,
525 const struct flow_offload *flow,
526 struct nf_flow_rule *flow_rule)
527{
528 u8 protonum = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.l4proto;
529 struct flow_action_entry *entry = flow_action_entry_next(flow_rule);
530
531 entry->id = FLOW_ACTION_CSUM;
532 entry->csum_flags = TCA_CSUM_UPDATE_FLAG_IPV4HDR;
533
534 switch (protonum) {
535 case IPPROTO_TCP:
536 entry->csum_flags |= TCA_CSUM_UPDATE_FLAG_TCP;
537 break;
538 case IPPROTO_UDP:
539 entry->csum_flags |= TCA_CSUM_UPDATE_FLAG_UDP;
540 break;
541 }
542}
543
544static void flow_offload_redirect(struct net *net,
545 const struct flow_offload *flow,
546 enum flow_offload_tuple_dir dir,
547 struct nf_flow_rule *flow_rule)
548{
549 const struct flow_offload_tuple *this_tuple, *other_tuple;
550 struct flow_action_entry *entry;
551 struct net_device *dev;
552 int ifindex;
553
554 this_tuple = &flow->tuplehash[dir].tuple;
555 switch (this_tuple->xmit_type) {
556 case FLOW_OFFLOAD_XMIT_DIRECT:
557 this_tuple = &flow->tuplehash[dir].tuple;
558 ifindex = this_tuple->out.ifidx;
559 break;
560 case FLOW_OFFLOAD_XMIT_NEIGH:
561 other_tuple = &flow->tuplehash[!dir].tuple;
562 ifindex = other_tuple->iifidx;
563 break;
564 default:
565 return;
566 }
567
568 dev = dev_get_by_index(net, ifindex);
569 if (!dev)
570 return;
571
572 entry = flow_action_entry_next(flow_rule);
573 entry->id = FLOW_ACTION_REDIRECT;
574 entry->dev = dev;
575}
576
577static void flow_offload_encap_tunnel(const struct flow_offload *flow,
578 enum flow_offload_tuple_dir dir,
579 struct nf_flow_rule *flow_rule)
580{
581 const struct flow_offload_tuple *this_tuple;
582 struct flow_action_entry *entry;
583 struct dst_entry *dst;
584
585 this_tuple = &flow->tuplehash[dir].tuple;
586 if (this_tuple->xmit_type == FLOW_OFFLOAD_XMIT_DIRECT)
587 return;
588
589 dst = this_tuple->dst_cache;
590 if (dst && dst->lwtstate) {
591 struct ip_tunnel_info *tun_info;
592
593 tun_info = lwt_tun_info(lwtstate: dst->lwtstate);
594 if (tun_info && (tun_info->mode & IP_TUNNEL_INFO_TX)) {
595 entry = flow_action_entry_next(flow_rule);
596 entry->id = FLOW_ACTION_TUNNEL_ENCAP;
597 entry->tunnel = tun_info;
598 }
599 }
600}
601
602static void flow_offload_decap_tunnel(const struct flow_offload *flow,
603 enum flow_offload_tuple_dir dir,
604 struct nf_flow_rule *flow_rule)
605{
606 const struct flow_offload_tuple *other_tuple;
607 struct flow_action_entry *entry;
608 struct dst_entry *dst;
609
610 other_tuple = &flow->tuplehash[!dir].tuple;
611 if (other_tuple->xmit_type == FLOW_OFFLOAD_XMIT_DIRECT)
612 return;
613
614 dst = other_tuple->dst_cache;
615 if (dst && dst->lwtstate) {
616 struct ip_tunnel_info *tun_info;
617
618 tun_info = lwt_tun_info(lwtstate: dst->lwtstate);
619 if (tun_info && (tun_info->mode & IP_TUNNEL_INFO_TX)) {
620 entry = flow_action_entry_next(flow_rule);
621 entry->id = FLOW_ACTION_TUNNEL_DECAP;
622 }
623 }
624}
625
626static int
627nf_flow_rule_route_common(struct net *net, const struct flow_offload *flow,
628 enum flow_offload_tuple_dir dir,
629 struct nf_flow_rule *flow_rule)
630{
631 const struct flow_offload_tuple *other_tuple;
632 const struct flow_offload_tuple *tuple;
633 int i;
634
635 flow_offload_decap_tunnel(flow, dir, flow_rule);
636 flow_offload_encap_tunnel(flow, dir, flow_rule);
637
638 if (flow_offload_eth_src(net, flow, dir, flow_rule) < 0 ||
639 flow_offload_eth_dst(net, flow, dir, flow_rule) < 0)
640 return -1;
641
642 tuple = &flow->tuplehash[dir].tuple;
643
644 for (i = 0; i < tuple->encap_num; i++) {
645 struct flow_action_entry *entry;
646
647 if (tuple->in_vlan_ingress & BIT(i))
648 continue;
649
650 if (tuple->encap[i].proto == htons(ETH_P_8021Q)) {
651 entry = flow_action_entry_next(flow_rule);
652 entry->id = FLOW_ACTION_VLAN_POP;
653 }
654 }
655
656 other_tuple = &flow->tuplehash[!dir].tuple;
657
658 for (i = 0; i < other_tuple->encap_num; i++) {
659 struct flow_action_entry *entry;
660
661 if (other_tuple->in_vlan_ingress & BIT(i))
662 continue;
663
664 entry = flow_action_entry_next(flow_rule);
665
666 switch (other_tuple->encap[i].proto) {
667 case htons(ETH_P_PPP_SES):
668 entry->id = FLOW_ACTION_PPPOE_PUSH;
669 entry->pppoe.sid = other_tuple->encap[i].id;
670 break;
671 case htons(ETH_P_8021Q):
672 entry->id = FLOW_ACTION_VLAN_PUSH;
673 entry->vlan.vid = other_tuple->encap[i].id;
674 entry->vlan.proto = other_tuple->encap[i].proto;
675 break;
676 }
677 }
678
679 return 0;
680}
681
682int nf_flow_rule_route_ipv4(struct net *net, struct flow_offload *flow,
683 enum flow_offload_tuple_dir dir,
684 struct nf_flow_rule *flow_rule)
685{
686 if (nf_flow_rule_route_common(net, flow, dir, flow_rule) < 0)
687 return -1;
688
689 if (test_bit(NF_FLOW_SNAT, &flow->flags)) {
690 flow_offload_ipv4_snat(net, flow, dir, flow_rule);
691 flow_offload_port_snat(net, flow, dir, flow_rule);
692 }
693 if (test_bit(NF_FLOW_DNAT, &flow->flags)) {
694 flow_offload_ipv4_dnat(net, flow, dir, flow_rule);
695 flow_offload_port_dnat(net, flow, dir, flow_rule);
696 }
697 if (test_bit(NF_FLOW_SNAT, &flow->flags) ||
698 test_bit(NF_FLOW_DNAT, &flow->flags))
699 flow_offload_ipv4_checksum(net, flow, flow_rule);
700
701 flow_offload_redirect(net, flow, dir, flow_rule);
702
703 return 0;
704}
705EXPORT_SYMBOL_GPL(nf_flow_rule_route_ipv4);
706
707int nf_flow_rule_route_ipv6(struct net *net, struct flow_offload *flow,
708 enum flow_offload_tuple_dir dir,
709 struct nf_flow_rule *flow_rule)
710{
711 if (nf_flow_rule_route_common(net, flow, dir, flow_rule) < 0)
712 return -1;
713
714 if (test_bit(NF_FLOW_SNAT, &flow->flags)) {
715 flow_offload_ipv6_snat(net, flow, dir, flow_rule);
716 flow_offload_port_snat(net, flow, dir, flow_rule);
717 }
718 if (test_bit(NF_FLOW_DNAT, &flow->flags)) {
719 flow_offload_ipv6_dnat(net, flow, dir, flow_rule);
720 flow_offload_port_dnat(net, flow, dir, flow_rule);
721 }
722
723 flow_offload_redirect(net, flow, dir, flow_rule);
724
725 return 0;
726}
727EXPORT_SYMBOL_GPL(nf_flow_rule_route_ipv6);
728
729#define NF_FLOW_RULE_ACTION_MAX 16
730
731static struct nf_flow_rule *
732nf_flow_offload_rule_alloc(struct net *net,
733 const struct flow_offload_work *offload,
734 enum flow_offload_tuple_dir dir)
735{
736 const struct nf_flowtable *flowtable = offload->flowtable;
737 const struct flow_offload_tuple *tuple, *other_tuple;
738 struct flow_offload *flow = offload->flow;
739 struct dst_entry *other_dst = NULL;
740 struct nf_flow_rule *flow_rule;
741 int err = -ENOMEM;
742
743 flow_rule = kzalloc(sizeof(*flow_rule), GFP_KERNEL);
744 if (!flow_rule)
745 goto err_flow;
746
747 flow_rule->rule = flow_rule_alloc(NF_FLOW_RULE_ACTION_MAX);
748 if (!flow_rule->rule)
749 goto err_flow_rule;
750
751 flow_rule->rule->match.dissector = &flow_rule->match.dissector;
752 flow_rule->rule->match.mask = &flow_rule->match.mask;
753 flow_rule->rule->match.key = &flow_rule->match.key;
754
755 tuple = &flow->tuplehash[dir].tuple;
756 other_tuple = &flow->tuplehash[!dir].tuple;
757 if (other_tuple->xmit_type == FLOW_OFFLOAD_XMIT_NEIGH)
758 other_dst = other_tuple->dst_cache;
759
760 err = nf_flow_rule_match(match: &flow_rule->match, tuple, other_dst);
761 if (err < 0)
762 goto err_flow_match;
763
764 flow_rule->rule->action.num_entries = 0;
765 if (flowtable->type->action(net, flow, dir, flow_rule) < 0)
766 goto err_flow_match;
767
768 return flow_rule;
769
770err_flow_match:
771 kfree(objp: flow_rule->rule);
772err_flow_rule:
773 kfree(objp: flow_rule);
774err_flow:
775 return NULL;
776}
777
778static void __nf_flow_offload_destroy(struct nf_flow_rule *flow_rule)
779{
780 struct flow_action_entry *entry;
781 int i;
782
783 for (i = 0; i < flow_rule->rule->action.num_entries; i++) {
784 entry = &flow_rule->rule->action.entries[i];
785 if (entry->id != FLOW_ACTION_REDIRECT)
786 continue;
787
788 dev_put(dev: entry->dev);
789 }
790 kfree(objp: flow_rule->rule);
791 kfree(objp: flow_rule);
792}
793
794static void nf_flow_offload_destroy(struct nf_flow_rule *flow_rule[])
795{
796 int i;
797
798 for (i = 0; i < FLOW_OFFLOAD_DIR_MAX; i++)
799 __nf_flow_offload_destroy(flow_rule: flow_rule[i]);
800}
801
802static int nf_flow_offload_alloc(const struct flow_offload_work *offload,
803 struct nf_flow_rule *flow_rule[])
804{
805 struct net *net = read_pnet(pnet: &offload->flowtable->net);
806
807 flow_rule[0] = nf_flow_offload_rule_alloc(net, offload,
808 dir: FLOW_OFFLOAD_DIR_ORIGINAL);
809 if (!flow_rule[0])
810 return -ENOMEM;
811
812 flow_rule[1] = nf_flow_offload_rule_alloc(net, offload,
813 dir: FLOW_OFFLOAD_DIR_REPLY);
814 if (!flow_rule[1]) {
815 __nf_flow_offload_destroy(flow_rule: flow_rule[0]);
816 return -ENOMEM;
817 }
818
819 return 0;
820}
821
822static void nf_flow_offload_init(struct flow_cls_offload *cls_flow,
823 __be16 proto, int priority,
824 enum flow_cls_command cmd,
825 const struct flow_offload_tuple *tuple,
826 struct netlink_ext_ack *extack)
827{
828 cls_flow->common.protocol = proto;
829 cls_flow->common.prio = priority;
830 cls_flow->common.extack = extack;
831 cls_flow->command = cmd;
832 cls_flow->cookie = (unsigned long)tuple;
833}
834
835static int nf_flow_offload_tuple(struct nf_flowtable *flowtable,
836 struct flow_offload *flow,
837 struct nf_flow_rule *flow_rule,
838 enum flow_offload_tuple_dir dir,
839 int priority, int cmd,
840 struct flow_stats *stats,
841 struct list_head *block_cb_list)
842{
843 struct flow_cls_offload cls_flow = {};
844 struct netlink_ext_ack extack = {};
845 struct flow_block_cb *block_cb;
846 __be16 proto = ETH_P_ALL;
847 int err, i = 0;
848
849 nf_flow_offload_init(cls_flow: &cls_flow, proto, priority, cmd,
850 tuple: &flow->tuplehash[dir].tuple, extack: &extack);
851 if (cmd == FLOW_CLS_REPLACE)
852 cls_flow.rule = flow_rule->rule;
853
854 down_read(sem: &flowtable->flow_block_lock);
855 list_for_each_entry(block_cb, block_cb_list, list) {
856 err = block_cb->cb(TC_SETUP_CLSFLOWER, &cls_flow,
857 block_cb->cb_priv);
858 if (err < 0)
859 continue;
860
861 i++;
862 }
863 up_read(sem: &flowtable->flow_block_lock);
864
865 if (cmd == FLOW_CLS_STATS)
866 memcpy(stats, &cls_flow.stats, sizeof(*stats));
867
868 return i;
869}
870
871static int flow_offload_tuple_add(struct flow_offload_work *offload,
872 struct nf_flow_rule *flow_rule,
873 enum flow_offload_tuple_dir dir)
874{
875 return nf_flow_offload_tuple(flowtable: offload->flowtable, flow: offload->flow,
876 flow_rule, dir,
877 priority: offload->flowtable->priority,
878 cmd: FLOW_CLS_REPLACE, NULL,
879 block_cb_list: &offload->flowtable->flow_block.cb_list);
880}
881
882static void flow_offload_tuple_del(struct flow_offload_work *offload,
883 enum flow_offload_tuple_dir dir)
884{
885 nf_flow_offload_tuple(flowtable: offload->flowtable, flow: offload->flow, NULL, dir,
886 priority: offload->flowtable->priority,
887 cmd: FLOW_CLS_DESTROY, NULL,
888 block_cb_list: &offload->flowtable->flow_block.cb_list);
889}
890
891static int flow_offload_rule_add(struct flow_offload_work *offload,
892 struct nf_flow_rule *flow_rule[])
893{
894 int ok_count = 0;
895
896 ok_count += flow_offload_tuple_add(offload, flow_rule: flow_rule[0],
897 dir: FLOW_OFFLOAD_DIR_ORIGINAL);
898 if (test_bit(NF_FLOW_HW_BIDIRECTIONAL, &offload->flow->flags))
899 ok_count += flow_offload_tuple_add(offload, flow_rule: flow_rule[1],
900 dir: FLOW_OFFLOAD_DIR_REPLY);
901 if (ok_count == 0)
902 return -ENOENT;
903
904 return 0;
905}
906
907static void flow_offload_work_add(struct flow_offload_work *offload)
908{
909 struct nf_flow_rule *flow_rule[FLOW_OFFLOAD_DIR_MAX];
910 int err;
911
912 err = nf_flow_offload_alloc(offload, flow_rule);
913 if (err < 0)
914 return;
915
916 err = flow_offload_rule_add(offload, flow_rule);
917 if (err < 0)
918 goto out;
919
920 set_bit(nr: IPS_HW_OFFLOAD_BIT, addr: &offload->flow->ct->status);
921
922out:
923 nf_flow_offload_destroy(flow_rule);
924}
925
926static void flow_offload_work_del(struct flow_offload_work *offload)
927{
928 clear_bit(nr: IPS_HW_OFFLOAD_BIT, addr: &offload->flow->ct->status);
929 flow_offload_tuple_del(offload, dir: FLOW_OFFLOAD_DIR_ORIGINAL);
930 if (test_bit(NF_FLOW_HW_BIDIRECTIONAL, &offload->flow->flags))
931 flow_offload_tuple_del(offload, dir: FLOW_OFFLOAD_DIR_REPLY);
932 set_bit(nr: NF_FLOW_HW_DEAD, addr: &offload->flow->flags);
933}
934
935static void flow_offload_tuple_stats(struct flow_offload_work *offload,
936 enum flow_offload_tuple_dir dir,
937 struct flow_stats *stats)
938{
939 nf_flow_offload_tuple(flowtable: offload->flowtable, flow: offload->flow, NULL, dir,
940 priority: offload->flowtable->priority,
941 cmd: FLOW_CLS_STATS, stats,
942 block_cb_list: &offload->flowtable->flow_block.cb_list);
943}
944
945static void flow_offload_work_stats(struct flow_offload_work *offload)
946{
947 struct flow_stats stats[FLOW_OFFLOAD_DIR_MAX] = {};
948 u64 lastused;
949
950 flow_offload_tuple_stats(offload, dir: FLOW_OFFLOAD_DIR_ORIGINAL, stats: &stats[0]);
951 if (test_bit(NF_FLOW_HW_BIDIRECTIONAL, &offload->flow->flags))
952 flow_offload_tuple_stats(offload, dir: FLOW_OFFLOAD_DIR_REPLY,
953 stats: &stats[1]);
954
955 lastused = max_t(u64, stats[0].lastused, stats[1].lastused);
956 offload->flow->timeout = max_t(u64, offload->flow->timeout,
957 lastused + flow_offload_get_timeout(offload->flow));
958
959 if (offload->flowtable->flags & NF_FLOWTABLE_COUNTER) {
960 if (stats[0].pkts)
961 nf_ct_acct_add(ct: offload->flow->ct,
962 dir: FLOW_OFFLOAD_DIR_ORIGINAL,
963 packets: stats[0].pkts, bytes: stats[0].bytes);
964 if (stats[1].pkts)
965 nf_ct_acct_add(ct: offload->flow->ct,
966 dir: FLOW_OFFLOAD_DIR_REPLY,
967 packets: stats[1].pkts, bytes: stats[1].bytes);
968 }
969}
970
971static void flow_offload_work_handler(struct work_struct *work)
972{
973 struct flow_offload_work *offload;
974 struct net *net;
975
976 offload = container_of(work, struct flow_offload_work, work);
977 net = read_pnet(pnet: &offload->flowtable->net);
978 switch (offload->cmd) {
979 case FLOW_CLS_REPLACE:
980 flow_offload_work_add(offload);
981 NF_FLOW_TABLE_STAT_DEC_ATOMIC(net, count_wq_add);
982 break;
983 case FLOW_CLS_DESTROY:
984 flow_offload_work_del(offload);
985 NF_FLOW_TABLE_STAT_DEC_ATOMIC(net, count_wq_del);
986 break;
987 case FLOW_CLS_STATS:
988 flow_offload_work_stats(offload);
989 NF_FLOW_TABLE_STAT_DEC_ATOMIC(net, count_wq_stats);
990 break;
991 default:
992 WARN_ON_ONCE(1);
993 }
994
995 clear_bit(nr: NF_FLOW_HW_PENDING, addr: &offload->flow->flags);
996 kfree(objp: offload);
997}
998
999static void flow_offload_queue_work(struct flow_offload_work *offload)
1000{
1001 struct net *net = read_pnet(pnet: &offload->flowtable->net);
1002
1003 if (offload->cmd == FLOW_CLS_REPLACE) {
1004 NF_FLOW_TABLE_STAT_INC_ATOMIC(net, count_wq_add);
1005 queue_work(wq: nf_flow_offload_add_wq, work: &offload->work);
1006 } else if (offload->cmd == FLOW_CLS_DESTROY) {
1007 NF_FLOW_TABLE_STAT_INC_ATOMIC(net, count_wq_del);
1008 queue_work(wq: nf_flow_offload_del_wq, work: &offload->work);
1009 } else {
1010 NF_FLOW_TABLE_STAT_INC_ATOMIC(net, count_wq_stats);
1011 queue_work(wq: nf_flow_offload_stats_wq, work: &offload->work);
1012 }
1013}
1014
1015static struct flow_offload_work *
1016nf_flow_offload_work_alloc(struct nf_flowtable *flowtable,
1017 struct flow_offload *flow, unsigned int cmd)
1018{
1019 struct flow_offload_work *offload;
1020
1021 if (test_and_set_bit(nr: NF_FLOW_HW_PENDING, addr: &flow->flags))
1022 return NULL;
1023
1024 offload = kmalloc(sizeof(struct flow_offload_work), GFP_ATOMIC);
1025 if (!offload) {
1026 clear_bit(nr: NF_FLOW_HW_PENDING, addr: &flow->flags);
1027 return NULL;
1028 }
1029
1030 offload->cmd = cmd;
1031 offload->flow = flow;
1032 offload->flowtable = flowtable;
1033 INIT_WORK(&offload->work, flow_offload_work_handler);
1034
1035 return offload;
1036}
1037
1038
1039void nf_flow_offload_add(struct nf_flowtable *flowtable,
1040 struct flow_offload *flow)
1041{
1042 struct flow_offload_work *offload;
1043
1044 offload = nf_flow_offload_work_alloc(flowtable, flow, cmd: FLOW_CLS_REPLACE);
1045 if (!offload)
1046 return;
1047
1048 flow_offload_queue_work(offload);
1049}
1050
1051void nf_flow_offload_del(struct nf_flowtable *flowtable,
1052 struct flow_offload *flow)
1053{
1054 struct flow_offload_work *offload;
1055
1056 offload = nf_flow_offload_work_alloc(flowtable, flow, cmd: FLOW_CLS_DESTROY);
1057 if (!offload)
1058 return;
1059
1060 set_bit(nr: NF_FLOW_HW_DYING, addr: &flow->flags);
1061 flow_offload_queue_work(offload);
1062}
1063
1064void nf_flow_offload_stats(struct nf_flowtable *flowtable,
1065 struct flow_offload *flow)
1066{
1067 struct flow_offload_work *offload;
1068 __s32 delta;
1069
1070 delta = nf_flow_timeout_delta(timeout: flow->timeout);
1071 if ((delta >= (9 * flow_offload_get_timeout(flow)) / 10))
1072 return;
1073
1074 offload = nf_flow_offload_work_alloc(flowtable, flow, cmd: FLOW_CLS_STATS);
1075 if (!offload)
1076 return;
1077
1078 flow_offload_queue_work(offload);
1079}
1080
1081void nf_flow_table_offload_flush_cleanup(struct nf_flowtable *flowtable)
1082{
1083 if (nf_flowtable_hw_offload(flowtable)) {
1084 flush_workqueue(nf_flow_offload_del_wq);
1085 nf_flow_table_gc_run(flow_table: flowtable);
1086 }
1087}
1088
1089void nf_flow_table_offload_flush(struct nf_flowtable *flowtable)
1090{
1091 if (nf_flowtable_hw_offload(flowtable)) {
1092 flush_workqueue(nf_flow_offload_add_wq);
1093 flush_workqueue(nf_flow_offload_del_wq);
1094 flush_workqueue(nf_flow_offload_stats_wq);
1095 }
1096}
1097
1098static int nf_flow_table_block_setup(struct nf_flowtable *flowtable,
1099 struct flow_block_offload *bo,
1100 enum flow_block_command cmd)
1101{
1102 struct flow_block_cb *block_cb, *next;
1103 int err = 0;
1104
1105 down_write(sem: &flowtable->flow_block_lock);
1106 switch (cmd) {
1107 case FLOW_BLOCK_BIND:
1108 list_splice(list: &bo->cb_list, head: &flowtable->flow_block.cb_list);
1109 break;
1110 case FLOW_BLOCK_UNBIND:
1111 list_for_each_entry_safe(block_cb, next, &bo->cb_list, list) {
1112 list_del(entry: &block_cb->list);
1113 flow_block_cb_free(block_cb);
1114 }
1115 break;
1116 default:
1117 WARN_ON_ONCE(1);
1118 err = -EOPNOTSUPP;
1119 }
1120 up_write(sem: &flowtable->flow_block_lock);
1121
1122 return err;
1123}
1124
1125static void nf_flow_table_block_offload_init(struct flow_block_offload *bo,
1126 struct net *net,
1127 enum flow_block_command cmd,
1128 struct nf_flowtable *flowtable,
1129 struct netlink_ext_ack *extack)
1130{
1131 memset(bo, 0, sizeof(*bo));
1132 bo->net = net;
1133 bo->block = &flowtable->flow_block;
1134 bo->command = cmd;
1135 bo->binder_type = FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS;
1136 bo->extack = extack;
1137 bo->cb_list_head = &flowtable->flow_block.cb_list;
1138 INIT_LIST_HEAD(list: &bo->cb_list);
1139}
1140
1141static void nf_flow_table_indr_cleanup(struct flow_block_cb *block_cb)
1142{
1143 struct nf_flowtable *flowtable = block_cb->indr.data;
1144 struct net_device *dev = block_cb->indr.dev;
1145
1146 nf_flow_table_gc_cleanup(flowtable, dev);
1147 down_write(sem: &flowtable->flow_block_lock);
1148 list_del(entry: &block_cb->list);
1149 list_del(entry: &block_cb->driver_list);
1150 flow_block_cb_free(block_cb);
1151 up_write(sem: &flowtable->flow_block_lock);
1152}
1153
1154static int nf_flow_table_indr_offload_cmd(struct flow_block_offload *bo,
1155 struct nf_flowtable *flowtable,
1156 struct net_device *dev,
1157 enum flow_block_command cmd,
1158 struct netlink_ext_ack *extack)
1159{
1160 nf_flow_table_block_offload_init(bo, net: dev_net(dev), cmd, flowtable,
1161 extack);
1162
1163 return flow_indr_dev_setup_offload(dev, NULL, type: TC_SETUP_FT, data: flowtable, bo,
1164 cleanup: nf_flow_table_indr_cleanup);
1165}
1166
1167static int nf_flow_table_offload_cmd(struct flow_block_offload *bo,
1168 struct nf_flowtable *flowtable,
1169 struct net_device *dev,
1170 enum flow_block_command cmd,
1171 struct netlink_ext_ack *extack)
1172{
1173 int err;
1174
1175 nf_flow_table_block_offload_init(bo, net: dev_net(dev), cmd, flowtable,
1176 extack);
1177 down_write(sem: &flowtable->flow_block_lock);
1178 err = dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_FT, bo);
1179 up_write(sem: &flowtable->flow_block_lock);
1180 if (err < 0)
1181 return err;
1182
1183 return 0;
1184}
1185
1186int nf_flow_table_offload_setup(struct nf_flowtable *flowtable,
1187 struct net_device *dev,
1188 enum flow_block_command cmd)
1189{
1190 struct netlink_ext_ack extack = {};
1191 struct flow_block_offload bo;
1192 int err;
1193
1194 if (!nf_flowtable_hw_offload(flowtable))
1195 return nf_flow_offload_xdp_setup(flowtable, dev, cmd);
1196
1197 if (dev->netdev_ops->ndo_setup_tc)
1198 err = nf_flow_table_offload_cmd(bo: &bo, flowtable, dev, cmd,
1199 extack: &extack);
1200 else
1201 err = nf_flow_table_indr_offload_cmd(bo: &bo, flowtable, dev, cmd,
1202 extack: &extack);
1203 if (err < 0)
1204 return err;
1205
1206 return nf_flow_table_block_setup(flowtable, bo: &bo, cmd);
1207}
1208EXPORT_SYMBOL_GPL(nf_flow_table_offload_setup);
1209
1210int nf_flow_table_offload_init(void)
1211{
1212 nf_flow_offload_add_wq = alloc_workqueue("nf_ft_offload_add",
1213 WQ_UNBOUND | WQ_SYSFS, 0);
1214 if (!nf_flow_offload_add_wq)
1215 return -ENOMEM;
1216
1217 nf_flow_offload_del_wq = alloc_workqueue("nf_ft_offload_del",
1218 WQ_UNBOUND | WQ_SYSFS, 0);
1219 if (!nf_flow_offload_del_wq)
1220 goto err_del_wq;
1221
1222 nf_flow_offload_stats_wq = alloc_workqueue("nf_ft_offload_stats",
1223 WQ_UNBOUND | WQ_SYSFS, 0);
1224 if (!nf_flow_offload_stats_wq)
1225 goto err_stats_wq;
1226
1227 return 0;
1228
1229err_stats_wq:
1230 destroy_workqueue(wq: nf_flow_offload_del_wq);
1231err_del_wq:
1232 destroy_workqueue(wq: nf_flow_offload_add_wq);
1233 return -ENOMEM;
1234}
1235
1236void nf_flow_table_offload_exit(void)
1237{
1238 destroy_workqueue(wq: nf_flow_offload_add_wq);
1239 destroy_workqueue(wq: nf_flow_offload_del_wq);
1240 destroy_workqueue(wq: nf_flow_offload_stats_wq);
1241}
1242

source code of linux/net/netfilter/nf_flow_table_offload.c