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>
16 static struct workqueue_struct *nf_flow_offload_add_wq;
17 static struct workqueue_struct *nf_flow_offload_del_wq;
18 static struct workqueue_struct *nf_flow_offload_stats_wq;
20 struct flow_offload_work {
21 struct list_head list;
22 enum flow_cls_command cmd;
24 struct nf_flowtable *flowtable;
25 struct flow_offload *flow;
26 struct work_struct work;
29 #define NF_FLOW_DISSECTOR(__match, __type, __field) \
30 (__match)->dissector.offset[__type] = \
31 offsetof(struct nf_flow_key, __field)
33 static void nf_flow_rule_lwt_match(struct nf_flow_match *match,
34 struct ip_tunnel_info *tun_info)
36 struct nf_flow_key *mask = &match->mask;
37 struct nf_flow_key *key = &match->key;
38 unsigned int enc_keys;
40 if (!tun_info || !(tun_info->mode & IP_TUNNEL_INFO_TX))
43 NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_ENC_CONTROL, enc_control);
44 NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_ENC_KEYID, enc_key_id);
45 key->enc_key_id.keyid = tunnel_id_to_key32(tun_info->key.tun_id);
46 mask->enc_key_id.keyid = 0xffffffff;
47 enc_keys = BIT(FLOW_DISSECTOR_KEY_ENC_KEYID) |
48 BIT(FLOW_DISSECTOR_KEY_ENC_CONTROL);
50 if (ip_tunnel_info_af(tun_info) == AF_INET) {
51 NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS,
53 key->enc_ipv4.src = tun_info->key.u.ipv4.dst;
54 key->enc_ipv4.dst = tun_info->key.u.ipv4.src;
55 if (key->enc_ipv4.src)
56 mask->enc_ipv4.src = 0xffffffff;
57 if (key->enc_ipv4.dst)
58 mask->enc_ipv4.dst = 0xffffffff;
59 enc_keys |= BIT(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS);
60 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
62 memcpy(&key->enc_ipv6.src, &tun_info->key.u.ipv6.dst,
63 sizeof(struct in6_addr));
64 memcpy(&key->enc_ipv6.dst, &tun_info->key.u.ipv6.src,
65 sizeof(struct in6_addr));
66 if (memcmp(&key->enc_ipv6.src, &in6addr_any,
67 sizeof(struct in6_addr)))
68 memset(&mask->enc_ipv6.src, 0xff,
69 sizeof(struct in6_addr));
70 if (memcmp(&key->enc_ipv6.dst, &in6addr_any,
71 sizeof(struct in6_addr)))
72 memset(&mask->enc_ipv6.dst, 0xff,
73 sizeof(struct in6_addr));
74 enc_keys |= BIT(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS);
75 key->enc_control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
78 match->dissector.used_keys |= enc_keys;
81 static void nf_flow_rule_vlan_match(struct flow_dissector_key_vlan *key,
82 struct flow_dissector_key_vlan *mask,
83 u16 vlan_id, __be16 proto)
85 key->vlan_id = vlan_id;
86 mask->vlan_id = VLAN_VID_MASK;
87 key->vlan_tpid = proto;
88 mask->vlan_tpid = 0xffff;
91 static int nf_flow_rule_match(struct nf_flow_match *match,
92 const struct flow_offload_tuple *tuple,
93 struct dst_entry *other_dst)
95 struct nf_flow_key *mask = &match->mask;
96 struct nf_flow_key *key = &match->key;
97 struct ip_tunnel_info *tun_info;
98 bool vlan_encap = false;
100 NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_META, meta);
101 NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_CONTROL, control);
102 NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_BASIC, basic);
103 NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_IPV4_ADDRS, ipv4);
104 NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_IPV6_ADDRS, ipv6);
105 NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_TCP, tcp);
106 NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_PORTS, tp);
108 if (other_dst && other_dst->lwtstate) {
109 tun_info = lwt_tun_info(other_dst->lwtstate);
110 nf_flow_rule_lwt_match(match, tun_info);
113 key->meta.ingress_ifindex = tuple->iifidx;
114 mask->meta.ingress_ifindex = 0xffffffff;
116 if (tuple->encap_num > 0 && !(tuple->in_vlan_ingress & BIT(0)) &&
117 tuple->encap[0].proto == htons(ETH_P_8021Q)) {
118 NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_VLAN, vlan);
119 nf_flow_rule_vlan_match(&key->vlan, &mask->vlan,
121 tuple->encap[0].proto);
125 if (tuple->encap_num > 1 && !(tuple->in_vlan_ingress & BIT(1)) &&
126 tuple->encap[1].proto == htons(ETH_P_8021Q)) {
128 NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_CVLAN,
130 nf_flow_rule_vlan_match(&key->cvlan, &mask->cvlan,
132 tuple->encap[1].proto);
134 NF_FLOW_DISSECTOR(match, FLOW_DISSECTOR_KEY_VLAN,
136 nf_flow_rule_vlan_match(&key->vlan, &mask->vlan,
138 tuple->encap[1].proto);
142 switch (tuple->l3proto) {
144 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV4_ADDRS;
145 key->basic.n_proto = htons(ETH_P_IP);
146 key->ipv4.src = tuple->src_v4.s_addr;
147 mask->ipv4.src = 0xffffffff;
148 key->ipv4.dst = tuple->dst_v4.s_addr;
149 mask->ipv4.dst = 0xffffffff;
152 key->control.addr_type = FLOW_DISSECTOR_KEY_IPV6_ADDRS;
153 key->basic.n_proto = htons(ETH_P_IPV6);
154 key->ipv6.src = tuple->src_v6;
155 memset(&mask->ipv6.src, 0xff, sizeof(mask->ipv6.src));
156 key->ipv6.dst = tuple->dst_v6;
157 memset(&mask->ipv6.dst, 0xff, sizeof(mask->ipv6.dst));
162 mask->control.addr_type = 0xffff;
163 match->dissector.used_keys |= BIT(key->control.addr_type);
164 mask->basic.n_proto = 0xffff;
166 switch (tuple->l4proto) {
169 mask->tcp.flags = cpu_to_be16(be32_to_cpu(TCP_FLAG_RST | TCP_FLAG_FIN) >> 16);
170 match->dissector.used_keys |= BIT(FLOW_DISSECTOR_KEY_TCP);
178 key->basic.ip_proto = tuple->l4proto;
179 mask->basic.ip_proto = 0xff;
181 key->tp.src = tuple->src_port;
182 mask->tp.src = 0xffff;
183 key->tp.dst = tuple->dst_port;
184 mask->tp.dst = 0xffff;
186 match->dissector.used_keys |= BIT(FLOW_DISSECTOR_KEY_META) |
187 BIT(FLOW_DISSECTOR_KEY_CONTROL) |
188 BIT(FLOW_DISSECTOR_KEY_BASIC) |
189 BIT(FLOW_DISSECTOR_KEY_PORTS);
193 static void flow_offload_mangle(struct flow_action_entry *entry,
194 enum flow_action_mangle_base htype, u32 offset,
195 const __be32 *value, const __be32 *mask)
197 entry->id = FLOW_ACTION_MANGLE;
198 entry->mangle.htype = htype;
199 entry->mangle.offset = offset;
200 memcpy(&entry->mangle.mask, mask, sizeof(u32));
201 memcpy(&entry->mangle.val, value, sizeof(u32));
204 static inline struct flow_action_entry *
205 flow_action_entry_next(struct nf_flow_rule *flow_rule)
207 int i = flow_rule->rule->action.num_entries++;
209 return &flow_rule->rule->action.entries[i];
212 static int flow_offload_eth_src(struct net *net,
213 const struct flow_offload *flow,
214 enum flow_offload_tuple_dir dir,
215 struct nf_flow_rule *flow_rule)
217 struct flow_action_entry *entry0 = flow_action_entry_next(flow_rule);
218 struct flow_action_entry *entry1 = flow_action_entry_next(flow_rule);
219 const struct flow_offload_tuple *other_tuple, *this_tuple;
220 struct net_device *dev = NULL;
221 const unsigned char *addr;
225 this_tuple = &flow->tuplehash[dir].tuple;
227 switch (this_tuple->xmit_type) {
228 case FLOW_OFFLOAD_XMIT_DIRECT:
229 addr = this_tuple->out.h_source;
231 case FLOW_OFFLOAD_XMIT_NEIGH:
232 other_tuple = &flow->tuplehash[!dir].tuple;
233 dev = dev_get_by_index(net, other_tuple->iifidx);
237 addr = dev->dev_addr;
244 memcpy(&val16, addr, 2);
246 flow_offload_mangle(entry0, FLOW_ACT_MANGLE_HDR_TYPE_ETH, 4,
250 memcpy(&val, addr + 2, 4);
251 flow_offload_mangle(entry1, FLOW_ACT_MANGLE_HDR_TYPE_ETH, 8,
259 static int flow_offload_eth_dst(struct net *net,
260 const struct flow_offload *flow,
261 enum flow_offload_tuple_dir dir,
262 struct nf_flow_rule *flow_rule)
264 struct flow_action_entry *entry0 = flow_action_entry_next(flow_rule);
265 struct flow_action_entry *entry1 = flow_action_entry_next(flow_rule);
266 const struct flow_offload_tuple *other_tuple, *this_tuple;
267 const struct dst_entry *dst_cache;
268 unsigned char ha[ETH_ALEN];
275 this_tuple = &flow->tuplehash[dir].tuple;
277 switch (this_tuple->xmit_type) {
278 case FLOW_OFFLOAD_XMIT_DIRECT:
279 ether_addr_copy(ha, this_tuple->out.h_dest);
281 case FLOW_OFFLOAD_XMIT_NEIGH:
282 other_tuple = &flow->tuplehash[!dir].tuple;
283 daddr = &other_tuple->src_v4;
284 dst_cache = this_tuple->dst_cache;
285 n = dst_neigh_lookup(dst_cache, daddr);
289 read_lock_bh(&n->lock);
290 nud_state = n->nud_state;
291 ether_addr_copy(ha, n->ha);
292 read_unlock_bh(&n->lock);
295 if (!(nud_state & NUD_VALID))
304 flow_offload_mangle(entry0, FLOW_ACT_MANGLE_HDR_TYPE_ETH, 0,
308 memcpy(&val16, ha + 4, 2);
310 flow_offload_mangle(entry1, FLOW_ACT_MANGLE_HDR_TYPE_ETH, 4,
316 static void flow_offload_ipv4_snat(struct net *net,
317 const struct flow_offload *flow,
318 enum flow_offload_tuple_dir dir,
319 struct nf_flow_rule *flow_rule)
321 struct flow_action_entry *entry = flow_action_entry_next(flow_rule);
322 u32 mask = ~htonl(0xffffffff);
327 case FLOW_OFFLOAD_DIR_ORIGINAL:
328 addr = flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.dst_v4.s_addr;
329 offset = offsetof(struct iphdr, saddr);
331 case FLOW_OFFLOAD_DIR_REPLY:
332 addr = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.src_v4.s_addr;
333 offset = offsetof(struct iphdr, daddr);
339 flow_offload_mangle(entry, FLOW_ACT_MANGLE_HDR_TYPE_IP4, offset,
343 static void flow_offload_ipv4_dnat(struct net *net,
344 const struct flow_offload *flow,
345 enum flow_offload_tuple_dir dir,
346 struct nf_flow_rule *flow_rule)
348 struct flow_action_entry *entry = flow_action_entry_next(flow_rule);
349 u32 mask = ~htonl(0xffffffff);
354 case FLOW_OFFLOAD_DIR_ORIGINAL:
355 addr = flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.src_v4.s_addr;
356 offset = offsetof(struct iphdr, daddr);
358 case FLOW_OFFLOAD_DIR_REPLY:
359 addr = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.dst_v4.s_addr;
360 offset = offsetof(struct iphdr, saddr);
366 flow_offload_mangle(entry, FLOW_ACT_MANGLE_HDR_TYPE_IP4, offset,
370 static void flow_offload_ipv6_mangle(struct nf_flow_rule *flow_rule,
372 const __be32 *addr, const __be32 *mask)
374 struct flow_action_entry *entry;
377 for (i = 0, j = 0; i < sizeof(struct in6_addr) / sizeof(u32); i += sizeof(u32), j++) {
378 entry = flow_action_entry_next(flow_rule);
379 flow_offload_mangle(entry, FLOW_ACT_MANGLE_HDR_TYPE_IP6,
380 offset + i, &addr[j], mask);
384 static void flow_offload_ipv6_snat(struct net *net,
385 const struct flow_offload *flow,
386 enum flow_offload_tuple_dir dir,
387 struct nf_flow_rule *flow_rule)
389 u32 mask = ~htonl(0xffffffff);
394 case FLOW_OFFLOAD_DIR_ORIGINAL:
395 addr = flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.dst_v6.s6_addr32;
396 offset = offsetof(struct ipv6hdr, saddr);
398 case FLOW_OFFLOAD_DIR_REPLY:
399 addr = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.src_v6.s6_addr32;
400 offset = offsetof(struct ipv6hdr, daddr);
406 flow_offload_ipv6_mangle(flow_rule, offset, addr, &mask);
409 static void flow_offload_ipv6_dnat(struct net *net,
410 const struct flow_offload *flow,
411 enum flow_offload_tuple_dir dir,
412 struct nf_flow_rule *flow_rule)
414 u32 mask = ~htonl(0xffffffff);
419 case FLOW_OFFLOAD_DIR_ORIGINAL:
420 addr = flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.src_v6.s6_addr32;
421 offset = offsetof(struct ipv6hdr, daddr);
423 case FLOW_OFFLOAD_DIR_REPLY:
424 addr = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.dst_v6.s6_addr32;
425 offset = offsetof(struct ipv6hdr, saddr);
431 flow_offload_ipv6_mangle(flow_rule, offset, addr, &mask);
434 static int flow_offload_l4proto(const struct flow_offload *flow)
436 u8 protonum = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.l4proto;
441 type = FLOW_ACT_MANGLE_HDR_TYPE_TCP;
444 type = FLOW_ACT_MANGLE_HDR_TYPE_UDP;
453 static void flow_offload_port_snat(struct net *net,
454 const struct flow_offload *flow,
455 enum flow_offload_tuple_dir dir,
456 struct nf_flow_rule *flow_rule)
458 struct flow_action_entry *entry = flow_action_entry_next(flow_rule);
463 case FLOW_OFFLOAD_DIR_ORIGINAL:
464 port = ntohs(flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.dst_port);
465 offset = 0; /* offsetof(struct tcphdr, source); */
466 port = htonl(port << 16);
467 mask = ~htonl(0xffff0000);
469 case FLOW_OFFLOAD_DIR_REPLY:
470 port = ntohs(flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.src_port);
471 offset = 0; /* offsetof(struct tcphdr, dest); */
473 mask = ~htonl(0xffff);
479 flow_offload_mangle(entry, flow_offload_l4proto(flow), offset,
483 static void flow_offload_port_dnat(struct net *net,
484 const struct flow_offload *flow,
485 enum flow_offload_tuple_dir dir,
486 struct nf_flow_rule *flow_rule)
488 struct flow_action_entry *entry = flow_action_entry_next(flow_rule);
493 case FLOW_OFFLOAD_DIR_ORIGINAL:
494 port = ntohs(flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.src_port);
495 offset = 0; /* offsetof(struct tcphdr, dest); */
497 mask = ~htonl(0xffff);
499 case FLOW_OFFLOAD_DIR_REPLY:
500 port = ntohs(flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.dst_port);
501 offset = 0; /* offsetof(struct tcphdr, source); */
502 port = htonl(port << 16);
503 mask = ~htonl(0xffff0000);
509 flow_offload_mangle(entry, flow_offload_l4proto(flow), offset,
513 static void flow_offload_ipv4_checksum(struct net *net,
514 const struct flow_offload *flow,
515 struct nf_flow_rule *flow_rule)
517 u8 protonum = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.l4proto;
518 struct flow_action_entry *entry = flow_action_entry_next(flow_rule);
520 entry->id = FLOW_ACTION_CSUM;
521 entry->csum_flags = TCA_CSUM_UPDATE_FLAG_IPV4HDR;
525 entry->csum_flags |= TCA_CSUM_UPDATE_FLAG_TCP;
528 entry->csum_flags |= TCA_CSUM_UPDATE_FLAG_UDP;
533 static void flow_offload_redirect(struct net *net,
534 const struct flow_offload *flow,
535 enum flow_offload_tuple_dir dir,
536 struct nf_flow_rule *flow_rule)
538 const struct flow_offload_tuple *this_tuple, *other_tuple;
539 struct flow_action_entry *entry;
540 struct net_device *dev;
543 this_tuple = &flow->tuplehash[dir].tuple;
544 switch (this_tuple->xmit_type) {
545 case FLOW_OFFLOAD_XMIT_DIRECT:
546 this_tuple = &flow->tuplehash[dir].tuple;
547 ifindex = this_tuple->out.hw_ifidx;
549 case FLOW_OFFLOAD_XMIT_NEIGH:
550 other_tuple = &flow->tuplehash[!dir].tuple;
551 ifindex = other_tuple->iifidx;
557 dev = dev_get_by_index(net, ifindex);
561 entry = flow_action_entry_next(flow_rule);
562 entry->id = FLOW_ACTION_REDIRECT;
566 static void flow_offload_encap_tunnel(const struct flow_offload *flow,
567 enum flow_offload_tuple_dir dir,
568 struct nf_flow_rule *flow_rule)
570 const struct flow_offload_tuple *this_tuple;
571 struct flow_action_entry *entry;
572 struct dst_entry *dst;
574 this_tuple = &flow->tuplehash[dir].tuple;
575 if (this_tuple->xmit_type == FLOW_OFFLOAD_XMIT_DIRECT)
578 dst = this_tuple->dst_cache;
579 if (dst && dst->lwtstate) {
580 struct ip_tunnel_info *tun_info;
582 tun_info = lwt_tun_info(dst->lwtstate);
583 if (tun_info && (tun_info->mode & IP_TUNNEL_INFO_TX)) {
584 entry = flow_action_entry_next(flow_rule);
585 entry->id = FLOW_ACTION_TUNNEL_ENCAP;
586 entry->tunnel = tun_info;
591 static void flow_offload_decap_tunnel(const struct flow_offload *flow,
592 enum flow_offload_tuple_dir dir,
593 struct nf_flow_rule *flow_rule)
595 const struct flow_offload_tuple *other_tuple;
596 struct flow_action_entry *entry;
597 struct dst_entry *dst;
599 other_tuple = &flow->tuplehash[!dir].tuple;
600 if (other_tuple->xmit_type == FLOW_OFFLOAD_XMIT_DIRECT)
603 dst = other_tuple->dst_cache;
604 if (dst && dst->lwtstate) {
605 struct ip_tunnel_info *tun_info;
607 tun_info = lwt_tun_info(dst->lwtstate);
608 if (tun_info && (tun_info->mode & IP_TUNNEL_INFO_TX)) {
609 entry = flow_action_entry_next(flow_rule);
610 entry->id = FLOW_ACTION_TUNNEL_DECAP;
616 nf_flow_rule_route_common(struct net *net, const struct flow_offload *flow,
617 enum flow_offload_tuple_dir dir,
618 struct nf_flow_rule *flow_rule)
620 const struct flow_offload_tuple *other_tuple;
621 const struct flow_offload_tuple *tuple;
624 flow_offload_decap_tunnel(flow, dir, flow_rule);
625 flow_offload_encap_tunnel(flow, dir, flow_rule);
627 if (flow_offload_eth_src(net, flow, dir, flow_rule) < 0 ||
628 flow_offload_eth_dst(net, flow, dir, flow_rule) < 0)
631 tuple = &flow->tuplehash[dir].tuple;
633 for (i = 0; i < tuple->encap_num; i++) {
634 struct flow_action_entry *entry;
636 if (tuple->in_vlan_ingress & BIT(i))
639 if (tuple->encap[i].proto == htons(ETH_P_8021Q)) {
640 entry = flow_action_entry_next(flow_rule);
641 entry->id = FLOW_ACTION_VLAN_POP;
645 other_tuple = &flow->tuplehash[!dir].tuple;
647 for (i = 0; i < other_tuple->encap_num; i++) {
648 struct flow_action_entry *entry;
650 if (other_tuple->in_vlan_ingress & BIT(i))
653 entry = flow_action_entry_next(flow_rule);
655 switch (other_tuple->encap[i].proto) {
656 case htons(ETH_P_PPP_SES):
657 entry->id = FLOW_ACTION_PPPOE_PUSH;
658 entry->pppoe.sid = other_tuple->encap[i].id;
660 case htons(ETH_P_8021Q):
661 entry->id = FLOW_ACTION_VLAN_PUSH;
662 entry->vlan.vid = other_tuple->encap[i].id;
663 entry->vlan.proto = other_tuple->encap[i].proto;
671 int nf_flow_rule_route_ipv4(struct net *net, const struct flow_offload *flow,
672 enum flow_offload_tuple_dir dir,
673 struct nf_flow_rule *flow_rule)
675 if (nf_flow_rule_route_common(net, flow, dir, flow_rule) < 0)
678 if (test_bit(NF_FLOW_SNAT, &flow->flags)) {
679 flow_offload_ipv4_snat(net, flow, dir, flow_rule);
680 flow_offload_port_snat(net, flow, dir, flow_rule);
682 if (test_bit(NF_FLOW_DNAT, &flow->flags)) {
683 flow_offload_ipv4_dnat(net, flow, dir, flow_rule);
684 flow_offload_port_dnat(net, flow, dir, flow_rule);
686 if (test_bit(NF_FLOW_SNAT, &flow->flags) ||
687 test_bit(NF_FLOW_DNAT, &flow->flags))
688 flow_offload_ipv4_checksum(net, flow, flow_rule);
690 flow_offload_redirect(net, flow, dir, flow_rule);
694 EXPORT_SYMBOL_GPL(nf_flow_rule_route_ipv4);
696 int nf_flow_rule_route_ipv6(struct net *net, const struct flow_offload *flow,
697 enum flow_offload_tuple_dir dir,
698 struct nf_flow_rule *flow_rule)
700 if (nf_flow_rule_route_common(net, flow, dir, flow_rule) < 0)
703 if (test_bit(NF_FLOW_SNAT, &flow->flags)) {
704 flow_offload_ipv6_snat(net, flow, dir, flow_rule);
705 flow_offload_port_snat(net, flow, dir, flow_rule);
707 if (test_bit(NF_FLOW_DNAT, &flow->flags)) {
708 flow_offload_ipv6_dnat(net, flow, dir, flow_rule);
709 flow_offload_port_dnat(net, flow, dir, flow_rule);
712 flow_offload_redirect(net, flow, dir, flow_rule);
716 EXPORT_SYMBOL_GPL(nf_flow_rule_route_ipv6);
718 #define NF_FLOW_RULE_ACTION_MAX 16
720 static struct nf_flow_rule *
721 nf_flow_offload_rule_alloc(struct net *net,
722 const struct flow_offload_work *offload,
723 enum flow_offload_tuple_dir dir)
725 const struct nf_flowtable *flowtable = offload->flowtable;
726 const struct flow_offload_tuple *tuple, *other_tuple;
727 const struct flow_offload *flow = offload->flow;
728 struct dst_entry *other_dst = NULL;
729 struct nf_flow_rule *flow_rule;
732 flow_rule = kzalloc(sizeof(*flow_rule), GFP_KERNEL);
736 flow_rule->rule = flow_rule_alloc(NF_FLOW_RULE_ACTION_MAX);
737 if (!flow_rule->rule)
740 flow_rule->rule->match.dissector = &flow_rule->match.dissector;
741 flow_rule->rule->match.mask = &flow_rule->match.mask;
742 flow_rule->rule->match.key = &flow_rule->match.key;
744 tuple = &flow->tuplehash[dir].tuple;
745 other_tuple = &flow->tuplehash[!dir].tuple;
746 if (other_tuple->xmit_type == FLOW_OFFLOAD_XMIT_NEIGH)
747 other_dst = other_tuple->dst_cache;
749 err = nf_flow_rule_match(&flow_rule->match, tuple, other_dst);
753 flow_rule->rule->action.num_entries = 0;
754 if (flowtable->type->action(net, flow, dir, flow_rule) < 0)
760 kfree(flow_rule->rule);
767 static void __nf_flow_offload_destroy(struct nf_flow_rule *flow_rule)
769 struct flow_action_entry *entry;
772 for (i = 0; i < flow_rule->rule->action.num_entries; i++) {
773 entry = &flow_rule->rule->action.entries[i];
774 if (entry->id != FLOW_ACTION_REDIRECT)
779 kfree(flow_rule->rule);
783 static void nf_flow_offload_destroy(struct nf_flow_rule *flow_rule[])
787 for (i = 0; i < FLOW_OFFLOAD_DIR_MAX; i++)
788 __nf_flow_offload_destroy(flow_rule[i]);
791 static int nf_flow_offload_alloc(const struct flow_offload_work *offload,
792 struct nf_flow_rule *flow_rule[])
794 struct net *net = read_pnet(&offload->flowtable->net);
796 flow_rule[0] = nf_flow_offload_rule_alloc(net, offload,
797 FLOW_OFFLOAD_DIR_ORIGINAL);
801 flow_rule[1] = nf_flow_offload_rule_alloc(net, offload,
802 FLOW_OFFLOAD_DIR_REPLY);
804 __nf_flow_offload_destroy(flow_rule[0]);
811 static void nf_flow_offload_init(struct flow_cls_offload *cls_flow,
812 __be16 proto, int priority,
813 enum flow_cls_command cmd,
814 const struct flow_offload_tuple *tuple,
815 struct netlink_ext_ack *extack)
817 cls_flow->common.protocol = proto;
818 cls_flow->common.prio = priority;
819 cls_flow->common.extack = extack;
820 cls_flow->command = cmd;
821 cls_flow->cookie = (unsigned long)tuple;
824 static int nf_flow_offload_tuple(struct nf_flowtable *flowtable,
825 struct flow_offload *flow,
826 struct nf_flow_rule *flow_rule,
827 enum flow_offload_tuple_dir dir,
828 int priority, int cmd,
829 struct flow_stats *stats,
830 struct list_head *block_cb_list)
832 struct flow_cls_offload cls_flow = {};
833 struct flow_block_cb *block_cb;
834 struct netlink_ext_ack extack;
835 __be16 proto = ETH_P_ALL;
838 nf_flow_offload_init(&cls_flow, proto, priority, cmd,
839 &flow->tuplehash[dir].tuple, &extack);
840 if (cmd == FLOW_CLS_REPLACE)
841 cls_flow.rule = flow_rule->rule;
843 down_read(&flowtable->flow_block_lock);
844 list_for_each_entry(block_cb, block_cb_list, list) {
845 err = block_cb->cb(TC_SETUP_CLSFLOWER, &cls_flow,
852 up_read(&flowtable->flow_block_lock);
854 if (cmd == FLOW_CLS_STATS)
855 memcpy(stats, &cls_flow.stats, sizeof(*stats));
860 static int flow_offload_tuple_add(struct flow_offload_work *offload,
861 struct nf_flow_rule *flow_rule,
862 enum flow_offload_tuple_dir dir)
864 return nf_flow_offload_tuple(offload->flowtable, offload->flow,
865 flow_rule, dir, offload->priority,
866 FLOW_CLS_REPLACE, NULL,
867 &offload->flowtable->flow_block.cb_list);
870 static void flow_offload_tuple_del(struct flow_offload_work *offload,
871 enum flow_offload_tuple_dir dir)
873 nf_flow_offload_tuple(offload->flowtable, offload->flow, NULL, dir,
874 offload->priority, FLOW_CLS_DESTROY, NULL,
875 &offload->flowtable->flow_block.cb_list);
878 static int flow_offload_rule_add(struct flow_offload_work *offload,
879 struct nf_flow_rule *flow_rule[])
883 ok_count += flow_offload_tuple_add(offload, flow_rule[0],
884 FLOW_OFFLOAD_DIR_ORIGINAL);
885 ok_count += flow_offload_tuple_add(offload, flow_rule[1],
886 FLOW_OFFLOAD_DIR_REPLY);
893 static void flow_offload_work_add(struct flow_offload_work *offload)
895 struct nf_flow_rule *flow_rule[FLOW_OFFLOAD_DIR_MAX];
898 err = nf_flow_offload_alloc(offload, flow_rule);
902 err = flow_offload_rule_add(offload, flow_rule);
906 set_bit(IPS_HW_OFFLOAD_BIT, &offload->flow->ct->status);
909 nf_flow_offload_destroy(flow_rule);
912 static void flow_offload_work_del(struct flow_offload_work *offload)
914 clear_bit(IPS_HW_OFFLOAD_BIT, &offload->flow->ct->status);
915 flow_offload_tuple_del(offload, FLOW_OFFLOAD_DIR_ORIGINAL);
916 flow_offload_tuple_del(offload, FLOW_OFFLOAD_DIR_REPLY);
917 set_bit(NF_FLOW_HW_DEAD, &offload->flow->flags);
920 static void flow_offload_tuple_stats(struct flow_offload_work *offload,
921 enum flow_offload_tuple_dir dir,
922 struct flow_stats *stats)
924 nf_flow_offload_tuple(offload->flowtable, offload->flow, NULL, dir,
925 offload->priority, FLOW_CLS_STATS, stats,
926 &offload->flowtable->flow_block.cb_list);
929 static void flow_offload_work_stats(struct flow_offload_work *offload)
931 struct flow_stats stats[FLOW_OFFLOAD_DIR_MAX] = {};
934 flow_offload_tuple_stats(offload, FLOW_OFFLOAD_DIR_ORIGINAL, &stats[0]);
935 flow_offload_tuple_stats(offload, FLOW_OFFLOAD_DIR_REPLY, &stats[1]);
937 lastused = max_t(u64, stats[0].lastused, stats[1].lastused);
938 offload->flow->timeout = max_t(u64, offload->flow->timeout,
939 lastused + flow_offload_get_timeout(offload->flow));
941 if (offload->flowtable->flags & NF_FLOWTABLE_COUNTER) {
943 nf_ct_acct_add(offload->flow->ct,
944 FLOW_OFFLOAD_DIR_ORIGINAL,
945 stats[0].pkts, stats[0].bytes);
947 nf_ct_acct_add(offload->flow->ct,
948 FLOW_OFFLOAD_DIR_REPLY,
949 stats[1].pkts, stats[1].bytes);
953 static void flow_offload_work_handler(struct work_struct *work)
955 struct flow_offload_work *offload;
957 offload = container_of(work, struct flow_offload_work, work);
958 switch (offload->cmd) {
959 case FLOW_CLS_REPLACE:
960 flow_offload_work_add(offload);
962 case FLOW_CLS_DESTROY:
963 flow_offload_work_del(offload);
966 flow_offload_work_stats(offload);
972 clear_bit(NF_FLOW_HW_PENDING, &offload->flow->flags);
976 static void flow_offload_queue_work(struct flow_offload_work *offload)
978 if (offload->cmd == FLOW_CLS_REPLACE)
979 queue_work(nf_flow_offload_add_wq, &offload->work);
980 else if (offload->cmd == FLOW_CLS_DESTROY)
981 queue_work(nf_flow_offload_del_wq, &offload->work);
983 queue_work(nf_flow_offload_stats_wq, &offload->work);
986 static struct flow_offload_work *
987 nf_flow_offload_work_alloc(struct nf_flowtable *flowtable,
988 struct flow_offload *flow, unsigned int cmd)
990 struct flow_offload_work *offload;
992 if (test_and_set_bit(NF_FLOW_HW_PENDING, &flow->flags))
995 offload = kmalloc(sizeof(struct flow_offload_work), GFP_ATOMIC);
997 clear_bit(NF_FLOW_HW_PENDING, &flow->flags);
1002 offload->flow = flow;
1003 offload->priority = flowtable->priority;
1004 offload->flowtable = flowtable;
1005 INIT_WORK(&offload->work, flow_offload_work_handler);
1011 void nf_flow_offload_add(struct nf_flowtable *flowtable,
1012 struct flow_offload *flow)
1014 struct flow_offload_work *offload;
1016 offload = nf_flow_offload_work_alloc(flowtable, flow, FLOW_CLS_REPLACE);
1020 flow_offload_queue_work(offload);
1023 void nf_flow_offload_del(struct nf_flowtable *flowtable,
1024 struct flow_offload *flow)
1026 struct flow_offload_work *offload;
1028 offload = nf_flow_offload_work_alloc(flowtable, flow, FLOW_CLS_DESTROY);
1032 set_bit(NF_FLOW_HW_DYING, &flow->flags);
1033 flow_offload_queue_work(offload);
1036 void nf_flow_offload_stats(struct nf_flowtable *flowtable,
1037 struct flow_offload *flow)
1039 struct flow_offload_work *offload;
1042 delta = nf_flow_timeout_delta(flow->timeout);
1043 if ((delta >= (9 * flow_offload_get_timeout(flow)) / 10))
1046 offload = nf_flow_offload_work_alloc(flowtable, flow, FLOW_CLS_STATS);
1050 flow_offload_queue_work(offload);
1053 void nf_flow_table_offload_flush(struct nf_flowtable *flowtable)
1055 if (nf_flowtable_hw_offload(flowtable)) {
1056 flush_workqueue(nf_flow_offload_add_wq);
1057 flush_workqueue(nf_flow_offload_del_wq);
1058 flush_workqueue(nf_flow_offload_stats_wq);
1062 static int nf_flow_table_block_setup(struct nf_flowtable *flowtable,
1063 struct flow_block_offload *bo,
1064 enum flow_block_command cmd)
1066 struct flow_block_cb *block_cb, *next;
1070 case FLOW_BLOCK_BIND:
1071 list_splice(&bo->cb_list, &flowtable->flow_block.cb_list);
1073 case FLOW_BLOCK_UNBIND:
1074 list_for_each_entry_safe(block_cb, next, &bo->cb_list, list) {
1075 list_del(&block_cb->list);
1076 flow_block_cb_free(block_cb);
1087 static void nf_flow_table_block_offload_init(struct flow_block_offload *bo,
1089 enum flow_block_command cmd,
1090 struct nf_flowtable *flowtable,
1091 struct netlink_ext_ack *extack)
1093 memset(bo, 0, sizeof(*bo));
1095 bo->block = &flowtable->flow_block;
1097 bo->binder_type = FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS;
1098 bo->extack = extack;
1099 bo->cb_list_head = &flowtable->flow_block.cb_list;
1100 INIT_LIST_HEAD(&bo->cb_list);
1103 static void nf_flow_table_indr_cleanup(struct flow_block_cb *block_cb)
1105 struct nf_flowtable *flowtable = block_cb->indr.data;
1106 struct net_device *dev = block_cb->indr.dev;
1108 nf_flow_table_gc_cleanup(flowtable, dev);
1109 down_write(&flowtable->flow_block_lock);
1110 list_del(&block_cb->list);
1111 list_del(&block_cb->driver_list);
1112 flow_block_cb_free(block_cb);
1113 up_write(&flowtable->flow_block_lock);
1116 static int nf_flow_table_indr_offload_cmd(struct flow_block_offload *bo,
1117 struct nf_flowtable *flowtable,
1118 struct net_device *dev,
1119 enum flow_block_command cmd,
1120 struct netlink_ext_ack *extack)
1122 nf_flow_table_block_offload_init(bo, dev_net(dev), cmd, flowtable,
1125 return flow_indr_dev_setup_offload(dev, NULL, TC_SETUP_FT, flowtable, bo,
1126 nf_flow_table_indr_cleanup);
1129 static int nf_flow_table_offload_cmd(struct flow_block_offload *bo,
1130 struct nf_flowtable *flowtable,
1131 struct net_device *dev,
1132 enum flow_block_command cmd,
1133 struct netlink_ext_ack *extack)
1137 nf_flow_table_block_offload_init(bo, dev_net(dev), cmd, flowtable,
1139 err = dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_FT, bo);
1146 int nf_flow_table_offload_setup(struct nf_flowtable *flowtable,
1147 struct net_device *dev,
1148 enum flow_block_command cmd)
1150 struct netlink_ext_ack extack = {};
1151 struct flow_block_offload bo;
1154 if (!nf_flowtable_hw_offload(flowtable))
1157 if (dev->netdev_ops->ndo_setup_tc)
1158 err = nf_flow_table_offload_cmd(&bo, flowtable, dev, cmd,
1161 err = nf_flow_table_indr_offload_cmd(&bo, flowtable, dev, cmd,
1166 return nf_flow_table_block_setup(flowtable, &bo, cmd);
1168 EXPORT_SYMBOL_GPL(nf_flow_table_offload_setup);
1170 int nf_flow_table_offload_init(void)
1172 nf_flow_offload_add_wq = alloc_workqueue("nf_ft_offload_add",
1173 WQ_UNBOUND | WQ_SYSFS, 0);
1174 if (!nf_flow_offload_add_wq)
1177 nf_flow_offload_del_wq = alloc_workqueue("nf_ft_offload_del",
1178 WQ_UNBOUND | WQ_SYSFS, 0);
1179 if (!nf_flow_offload_del_wq)
1182 nf_flow_offload_stats_wq = alloc_workqueue("nf_ft_offload_stats",
1183 WQ_UNBOUND | WQ_SYSFS, 0);
1184 if (!nf_flow_offload_stats_wq)
1190 destroy_workqueue(nf_flow_offload_del_wq);
1192 destroy_workqueue(nf_flow_offload_add_wq);
1196 void nf_flow_table_offload_exit(void)
1198 destroy_workqueue(nf_flow_offload_add_wq);
1199 destroy_workqueue(nf_flow_offload_del_wq);
1200 destroy_workqueue(nf_flow_offload_stats_wq);