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(&key->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(&key->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,
260 static int flow_offload_eth_dst(struct net *net,
261 const struct flow_offload *flow,
262 enum flow_offload_tuple_dir dir,
263 struct nf_flow_rule *flow_rule)
265 struct flow_action_entry *entry0 = flow_action_entry_next(flow_rule);
266 struct flow_action_entry *entry1 = flow_action_entry_next(flow_rule);
267 const struct flow_offload_tuple *other_tuple, *this_tuple;
268 const struct dst_entry *dst_cache;
269 unsigned char ha[ETH_ALEN];
276 this_tuple = &flow->tuplehash[dir].tuple;
278 switch (this_tuple->xmit_type) {
279 case FLOW_OFFLOAD_XMIT_DIRECT:
280 ether_addr_copy(ha, this_tuple->out.h_dest);
282 case FLOW_OFFLOAD_XMIT_NEIGH:
283 other_tuple = &flow->tuplehash[!dir].tuple;
284 daddr = &other_tuple->src_v4;
285 dst_cache = this_tuple->dst_cache;
286 n = dst_neigh_lookup(dst_cache, daddr);
290 read_lock_bh(&n->lock);
291 nud_state = n->nud_state;
292 ether_addr_copy(ha, n->ha);
293 read_unlock_bh(&n->lock);
296 if (!(nud_state & NUD_VALID))
305 flow_offload_mangle(entry0, FLOW_ACT_MANGLE_HDR_TYPE_ETH, 0,
309 memcpy(&val16, ha + 4, 2);
311 flow_offload_mangle(entry1, FLOW_ACT_MANGLE_HDR_TYPE_ETH, 4,
317 static void flow_offload_ipv4_snat(struct net *net,
318 const struct flow_offload *flow,
319 enum flow_offload_tuple_dir dir,
320 struct nf_flow_rule *flow_rule)
322 struct flow_action_entry *entry = flow_action_entry_next(flow_rule);
323 u32 mask = ~htonl(0xffffffff);
328 case FLOW_OFFLOAD_DIR_ORIGINAL:
329 addr = flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.dst_v4.s_addr;
330 offset = offsetof(struct iphdr, saddr);
332 case FLOW_OFFLOAD_DIR_REPLY:
333 addr = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.src_v4.s_addr;
334 offset = offsetof(struct iphdr, daddr);
340 flow_offload_mangle(entry, FLOW_ACT_MANGLE_HDR_TYPE_IP4, offset,
344 static void flow_offload_ipv4_dnat(struct net *net,
345 const struct flow_offload *flow,
346 enum flow_offload_tuple_dir dir,
347 struct nf_flow_rule *flow_rule)
349 struct flow_action_entry *entry = flow_action_entry_next(flow_rule);
350 u32 mask = ~htonl(0xffffffff);
355 case FLOW_OFFLOAD_DIR_ORIGINAL:
356 addr = flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.src_v4.s_addr;
357 offset = offsetof(struct iphdr, daddr);
359 case FLOW_OFFLOAD_DIR_REPLY:
360 addr = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.dst_v4.s_addr;
361 offset = offsetof(struct iphdr, saddr);
367 flow_offload_mangle(entry, FLOW_ACT_MANGLE_HDR_TYPE_IP4, offset,
371 static void flow_offload_ipv6_mangle(struct nf_flow_rule *flow_rule,
373 const __be32 *addr, const __be32 *mask)
375 struct flow_action_entry *entry;
378 for (i = 0, j = 0; i < sizeof(struct in6_addr) / sizeof(u32); i += sizeof(u32), j++) {
379 entry = flow_action_entry_next(flow_rule);
380 flow_offload_mangle(entry, FLOW_ACT_MANGLE_HDR_TYPE_IP6,
381 offset + i, &addr[j], mask);
385 static void flow_offload_ipv6_snat(struct net *net,
386 const struct flow_offload *flow,
387 enum flow_offload_tuple_dir dir,
388 struct nf_flow_rule *flow_rule)
390 u32 mask = ~htonl(0xffffffff);
395 case FLOW_OFFLOAD_DIR_ORIGINAL:
396 addr = flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.dst_v6.s6_addr32;
397 offset = offsetof(struct ipv6hdr, saddr);
399 case FLOW_OFFLOAD_DIR_REPLY:
400 addr = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.src_v6.s6_addr32;
401 offset = offsetof(struct ipv6hdr, daddr);
407 flow_offload_ipv6_mangle(flow_rule, offset, addr, &mask);
410 static void flow_offload_ipv6_dnat(struct net *net,
411 const struct flow_offload *flow,
412 enum flow_offload_tuple_dir dir,
413 struct nf_flow_rule *flow_rule)
415 u32 mask = ~htonl(0xffffffff);
420 case FLOW_OFFLOAD_DIR_ORIGINAL:
421 addr = flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.src_v6.s6_addr32;
422 offset = offsetof(struct ipv6hdr, daddr);
424 case FLOW_OFFLOAD_DIR_REPLY:
425 addr = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.dst_v6.s6_addr32;
426 offset = offsetof(struct ipv6hdr, saddr);
432 flow_offload_ipv6_mangle(flow_rule, offset, addr, &mask);
435 static int flow_offload_l4proto(const struct flow_offload *flow)
437 u8 protonum = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.l4proto;
442 type = FLOW_ACT_MANGLE_HDR_TYPE_TCP;
445 type = FLOW_ACT_MANGLE_HDR_TYPE_UDP;
454 static void flow_offload_port_snat(struct net *net,
455 const struct flow_offload *flow,
456 enum flow_offload_tuple_dir dir,
457 struct nf_flow_rule *flow_rule)
459 struct flow_action_entry *entry = flow_action_entry_next(flow_rule);
464 case FLOW_OFFLOAD_DIR_ORIGINAL:
465 port = ntohs(flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.dst_port);
466 offset = 0; /* offsetof(struct tcphdr, source); */
467 port = htonl(port << 16);
468 mask = ~htonl(0xffff0000);
470 case FLOW_OFFLOAD_DIR_REPLY:
471 port = ntohs(flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.src_port);
472 offset = 0; /* offsetof(struct tcphdr, dest); */
474 mask = ~htonl(0xffff);
480 flow_offload_mangle(entry, flow_offload_l4proto(flow), offset,
484 static void flow_offload_port_dnat(struct net *net,
485 const struct flow_offload *flow,
486 enum flow_offload_tuple_dir dir,
487 struct nf_flow_rule *flow_rule)
489 struct flow_action_entry *entry = flow_action_entry_next(flow_rule);
494 case FLOW_OFFLOAD_DIR_ORIGINAL:
495 port = ntohs(flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.src_port);
496 offset = 0; /* offsetof(struct tcphdr, dest); */
498 mask = ~htonl(0xffff);
500 case FLOW_OFFLOAD_DIR_REPLY:
501 port = ntohs(flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.dst_port);
502 offset = 0; /* offsetof(struct tcphdr, source); */
503 port = htonl(port << 16);
504 mask = ~htonl(0xffff0000);
510 flow_offload_mangle(entry, flow_offload_l4proto(flow), offset,
514 static void flow_offload_ipv4_checksum(struct net *net,
515 const struct flow_offload *flow,
516 struct nf_flow_rule *flow_rule)
518 u8 protonum = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.l4proto;
519 struct flow_action_entry *entry = flow_action_entry_next(flow_rule);
521 entry->id = FLOW_ACTION_CSUM;
522 entry->csum_flags = TCA_CSUM_UPDATE_FLAG_IPV4HDR;
526 entry->csum_flags |= TCA_CSUM_UPDATE_FLAG_TCP;
529 entry->csum_flags |= TCA_CSUM_UPDATE_FLAG_UDP;
534 static void flow_offload_redirect(struct net *net,
535 const struct flow_offload *flow,
536 enum flow_offload_tuple_dir dir,
537 struct nf_flow_rule *flow_rule)
539 const struct flow_offload_tuple *this_tuple, *other_tuple;
540 struct flow_action_entry *entry;
541 struct net_device *dev;
544 this_tuple = &flow->tuplehash[dir].tuple;
545 switch (this_tuple->xmit_type) {
546 case FLOW_OFFLOAD_XMIT_DIRECT:
547 this_tuple = &flow->tuplehash[dir].tuple;
548 ifindex = this_tuple->out.hw_ifidx;
550 case FLOW_OFFLOAD_XMIT_NEIGH:
551 other_tuple = &flow->tuplehash[!dir].tuple;
552 ifindex = other_tuple->iifidx;
558 dev = dev_get_by_index(net, ifindex);
562 entry = flow_action_entry_next(flow_rule);
563 entry->id = FLOW_ACTION_REDIRECT;
567 static void flow_offload_encap_tunnel(const struct flow_offload *flow,
568 enum flow_offload_tuple_dir dir,
569 struct nf_flow_rule *flow_rule)
571 const struct flow_offload_tuple *this_tuple;
572 struct flow_action_entry *entry;
573 struct dst_entry *dst;
575 this_tuple = &flow->tuplehash[dir].tuple;
576 if (this_tuple->xmit_type == FLOW_OFFLOAD_XMIT_DIRECT)
579 dst = this_tuple->dst_cache;
580 if (dst && dst->lwtstate) {
581 struct ip_tunnel_info *tun_info;
583 tun_info = lwt_tun_info(dst->lwtstate);
584 if (tun_info && (tun_info->mode & IP_TUNNEL_INFO_TX)) {
585 entry = flow_action_entry_next(flow_rule);
586 entry->id = FLOW_ACTION_TUNNEL_ENCAP;
587 entry->tunnel = tun_info;
592 static void flow_offload_decap_tunnel(const struct flow_offload *flow,
593 enum flow_offload_tuple_dir dir,
594 struct nf_flow_rule *flow_rule)
596 const struct flow_offload_tuple *other_tuple;
597 struct flow_action_entry *entry;
598 struct dst_entry *dst;
600 other_tuple = &flow->tuplehash[!dir].tuple;
601 if (other_tuple->xmit_type == FLOW_OFFLOAD_XMIT_DIRECT)
604 dst = other_tuple->dst_cache;
605 if (dst && dst->lwtstate) {
606 struct ip_tunnel_info *tun_info;
608 tun_info = lwt_tun_info(dst->lwtstate);
609 if (tun_info && (tun_info->mode & IP_TUNNEL_INFO_TX)) {
610 entry = flow_action_entry_next(flow_rule);
611 entry->id = FLOW_ACTION_TUNNEL_DECAP;
617 nf_flow_rule_route_common(struct net *net, const struct flow_offload *flow,
618 enum flow_offload_tuple_dir dir,
619 struct nf_flow_rule *flow_rule)
621 const struct flow_offload_tuple *other_tuple;
622 const struct flow_offload_tuple *tuple;
625 flow_offload_decap_tunnel(flow, dir, flow_rule);
626 flow_offload_encap_tunnel(flow, dir, flow_rule);
628 if (flow_offload_eth_src(net, flow, dir, flow_rule) < 0 ||
629 flow_offload_eth_dst(net, flow, dir, flow_rule) < 0)
632 tuple = &flow->tuplehash[dir].tuple;
634 for (i = 0; i < tuple->encap_num; i++) {
635 struct flow_action_entry *entry;
637 if (tuple->in_vlan_ingress & BIT(i))
640 if (tuple->encap[i].proto == htons(ETH_P_8021Q)) {
641 entry = flow_action_entry_next(flow_rule);
642 entry->id = FLOW_ACTION_VLAN_POP;
646 other_tuple = &flow->tuplehash[!dir].tuple;
648 for (i = 0; i < other_tuple->encap_num; i++) {
649 struct flow_action_entry *entry;
651 if (other_tuple->in_vlan_ingress & BIT(i))
654 entry = flow_action_entry_next(flow_rule);
656 switch (other_tuple->encap[i].proto) {
657 case htons(ETH_P_PPP_SES):
658 entry->id = FLOW_ACTION_PPPOE_PUSH;
659 entry->pppoe.sid = other_tuple->encap[i].id;
661 case htons(ETH_P_8021Q):
662 entry->id = FLOW_ACTION_VLAN_PUSH;
663 entry->vlan.vid = other_tuple->encap[i].id;
664 entry->vlan.proto = other_tuple->encap[i].proto;
672 int nf_flow_rule_route_ipv4(struct net *net, const struct flow_offload *flow,
673 enum flow_offload_tuple_dir dir,
674 struct nf_flow_rule *flow_rule)
676 if (nf_flow_rule_route_common(net, flow, dir, flow_rule) < 0)
679 if (test_bit(NF_FLOW_SNAT, &flow->flags)) {
680 flow_offload_ipv4_snat(net, flow, dir, flow_rule);
681 flow_offload_port_snat(net, flow, dir, flow_rule);
683 if (test_bit(NF_FLOW_DNAT, &flow->flags)) {
684 flow_offload_ipv4_dnat(net, flow, dir, flow_rule);
685 flow_offload_port_dnat(net, flow, dir, flow_rule);
687 if (test_bit(NF_FLOW_SNAT, &flow->flags) ||
688 test_bit(NF_FLOW_DNAT, &flow->flags))
689 flow_offload_ipv4_checksum(net, flow, flow_rule);
691 flow_offload_redirect(net, flow, dir, flow_rule);
695 EXPORT_SYMBOL_GPL(nf_flow_rule_route_ipv4);
697 int nf_flow_rule_route_ipv6(struct net *net, const struct flow_offload *flow,
698 enum flow_offload_tuple_dir dir,
699 struct nf_flow_rule *flow_rule)
701 if (nf_flow_rule_route_common(net, flow, dir, flow_rule) < 0)
704 if (test_bit(NF_FLOW_SNAT, &flow->flags)) {
705 flow_offload_ipv6_snat(net, flow, dir, flow_rule);
706 flow_offload_port_snat(net, flow, dir, flow_rule);
708 if (test_bit(NF_FLOW_DNAT, &flow->flags)) {
709 flow_offload_ipv6_dnat(net, flow, dir, flow_rule);
710 flow_offload_port_dnat(net, flow, dir, flow_rule);
713 flow_offload_redirect(net, flow, dir, flow_rule);
717 EXPORT_SYMBOL_GPL(nf_flow_rule_route_ipv6);
719 #define NF_FLOW_RULE_ACTION_MAX 16
721 static struct nf_flow_rule *
722 nf_flow_offload_rule_alloc(struct net *net,
723 const struct flow_offload_work *offload,
724 enum flow_offload_tuple_dir dir)
726 const struct nf_flowtable *flowtable = offload->flowtable;
727 const struct flow_offload_tuple *tuple, *other_tuple;
728 const struct flow_offload *flow = offload->flow;
729 struct dst_entry *other_dst = NULL;
730 struct nf_flow_rule *flow_rule;
733 flow_rule = kzalloc(sizeof(*flow_rule), GFP_KERNEL);
737 flow_rule->rule = flow_rule_alloc(NF_FLOW_RULE_ACTION_MAX);
738 if (!flow_rule->rule)
741 flow_rule->rule->match.dissector = &flow_rule->match.dissector;
742 flow_rule->rule->match.mask = &flow_rule->match.mask;
743 flow_rule->rule->match.key = &flow_rule->match.key;
745 tuple = &flow->tuplehash[dir].tuple;
746 other_tuple = &flow->tuplehash[!dir].tuple;
747 if (other_tuple->xmit_type == FLOW_OFFLOAD_XMIT_NEIGH)
748 other_dst = other_tuple->dst_cache;
750 err = nf_flow_rule_match(&flow_rule->match, tuple, other_dst);
754 flow_rule->rule->action.num_entries = 0;
755 if (flowtable->type->action(net, flow, dir, flow_rule) < 0)
761 kfree(flow_rule->rule);
768 static void __nf_flow_offload_destroy(struct nf_flow_rule *flow_rule)
770 struct flow_action_entry *entry;
773 for (i = 0; i < flow_rule->rule->action.num_entries; i++) {
774 entry = &flow_rule->rule->action.entries[i];
775 if (entry->id != FLOW_ACTION_REDIRECT)
780 kfree(flow_rule->rule);
784 static void nf_flow_offload_destroy(struct nf_flow_rule *flow_rule[])
788 for (i = 0; i < FLOW_OFFLOAD_DIR_MAX; i++)
789 __nf_flow_offload_destroy(flow_rule[i]);
792 static int nf_flow_offload_alloc(const struct flow_offload_work *offload,
793 struct nf_flow_rule *flow_rule[])
795 struct net *net = read_pnet(&offload->flowtable->net);
797 flow_rule[0] = nf_flow_offload_rule_alloc(net, offload,
798 FLOW_OFFLOAD_DIR_ORIGINAL);
802 flow_rule[1] = nf_flow_offload_rule_alloc(net, offload,
803 FLOW_OFFLOAD_DIR_REPLY);
805 __nf_flow_offload_destroy(flow_rule[0]);
812 static void nf_flow_offload_init(struct flow_cls_offload *cls_flow,
813 __be16 proto, int priority,
814 enum flow_cls_command cmd,
815 const struct flow_offload_tuple *tuple,
816 struct netlink_ext_ack *extack)
818 cls_flow->common.protocol = proto;
819 cls_flow->common.prio = priority;
820 cls_flow->common.extack = extack;
821 cls_flow->command = cmd;
822 cls_flow->cookie = (unsigned long)tuple;
825 static int nf_flow_offload_tuple(struct nf_flowtable *flowtable,
826 struct flow_offload *flow,
827 struct nf_flow_rule *flow_rule,
828 enum flow_offload_tuple_dir dir,
829 int priority, int cmd,
830 struct flow_stats *stats,
831 struct list_head *block_cb_list)
833 struct flow_cls_offload cls_flow = {};
834 struct flow_block_cb *block_cb;
835 struct netlink_ext_ack extack;
836 __be16 proto = ETH_P_ALL;
839 nf_flow_offload_init(&cls_flow, proto, priority, cmd,
840 &flow->tuplehash[dir].tuple, &extack);
841 if (cmd == FLOW_CLS_REPLACE)
842 cls_flow.rule = flow_rule->rule;
844 down_read(&flowtable->flow_block_lock);
845 list_for_each_entry(block_cb, block_cb_list, list) {
846 err = block_cb->cb(TC_SETUP_CLSFLOWER, &cls_flow,
853 up_read(&flowtable->flow_block_lock);
855 if (cmd == FLOW_CLS_STATS)
856 memcpy(stats, &cls_flow.stats, sizeof(*stats));
861 static int flow_offload_tuple_add(struct flow_offload_work *offload,
862 struct nf_flow_rule *flow_rule,
863 enum flow_offload_tuple_dir dir)
865 return nf_flow_offload_tuple(offload->flowtable, offload->flow,
866 flow_rule, dir, offload->priority,
867 FLOW_CLS_REPLACE, NULL,
868 &offload->flowtable->flow_block.cb_list);
871 static void flow_offload_tuple_del(struct flow_offload_work *offload,
872 enum flow_offload_tuple_dir dir)
874 nf_flow_offload_tuple(offload->flowtable, offload->flow, NULL, dir,
875 offload->priority, FLOW_CLS_DESTROY, NULL,
876 &offload->flowtable->flow_block.cb_list);
879 static int flow_offload_rule_add(struct flow_offload_work *offload,
880 struct nf_flow_rule *flow_rule[])
884 ok_count += flow_offload_tuple_add(offload, flow_rule[0],
885 FLOW_OFFLOAD_DIR_ORIGINAL);
886 ok_count += flow_offload_tuple_add(offload, flow_rule[1],
887 FLOW_OFFLOAD_DIR_REPLY);
894 static void flow_offload_work_add(struct flow_offload_work *offload)
896 struct nf_flow_rule *flow_rule[FLOW_OFFLOAD_DIR_MAX];
899 err = nf_flow_offload_alloc(offload, flow_rule);
903 err = flow_offload_rule_add(offload, flow_rule);
905 set_bit(NF_FLOW_HW_REFRESH, &offload->flow->flags);
907 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 + NF_FLOW_TIMEOUT);
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 * NF_FLOW_TIMEOUT) / 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 INIT_LIST_HEAD(&bo->cb_list);
1102 static void nf_flow_table_indr_cleanup(struct flow_block_cb *block_cb)
1104 struct nf_flowtable *flowtable = block_cb->indr.data;
1105 struct net_device *dev = block_cb->indr.dev;
1107 nf_flow_table_gc_cleanup(flowtable, dev);
1108 down_write(&flowtable->flow_block_lock);
1109 list_del(&block_cb->list);
1110 list_del(&block_cb->driver_list);
1111 flow_block_cb_free(block_cb);
1112 up_write(&flowtable->flow_block_lock);
1115 static int nf_flow_table_indr_offload_cmd(struct flow_block_offload *bo,
1116 struct nf_flowtable *flowtable,
1117 struct net_device *dev,
1118 enum flow_block_command cmd,
1119 struct netlink_ext_ack *extack)
1121 nf_flow_table_block_offload_init(bo, dev_net(dev), cmd, flowtable,
1124 return flow_indr_dev_setup_offload(dev, NULL, TC_SETUP_FT, flowtable, bo,
1125 nf_flow_table_indr_cleanup);
1128 static int nf_flow_table_offload_cmd(struct flow_block_offload *bo,
1129 struct nf_flowtable *flowtable,
1130 struct net_device *dev,
1131 enum flow_block_command cmd,
1132 struct netlink_ext_ack *extack)
1136 nf_flow_table_block_offload_init(bo, dev_net(dev), cmd, flowtable,
1138 err = dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_FT, bo);
1145 int nf_flow_table_offload_setup(struct nf_flowtable *flowtable,
1146 struct net_device *dev,
1147 enum flow_block_command cmd)
1149 struct netlink_ext_ack extack = {};
1150 struct flow_block_offload bo;
1153 if (!nf_flowtable_hw_offload(flowtable))
1156 if (dev->netdev_ops->ndo_setup_tc)
1157 err = nf_flow_table_offload_cmd(&bo, flowtable, dev, cmd,
1160 err = nf_flow_table_indr_offload_cmd(&bo, flowtable, dev, cmd,
1165 return nf_flow_table_block_setup(flowtable, &bo, cmd);
1167 EXPORT_SYMBOL_GPL(nf_flow_table_offload_setup);
1169 int nf_flow_table_offload_init(void)
1171 nf_flow_offload_add_wq = alloc_workqueue("nf_ft_offload_add",
1172 WQ_UNBOUND | WQ_SYSFS, 0);
1173 if (!nf_flow_offload_add_wq)
1176 nf_flow_offload_del_wq = alloc_workqueue("nf_ft_offload_del",
1177 WQ_UNBOUND | WQ_SYSFS, 0);
1178 if (!nf_flow_offload_del_wq)
1181 nf_flow_offload_stats_wq = alloc_workqueue("nf_ft_offload_stats",
1182 WQ_UNBOUND | WQ_SYSFS, 0);
1183 if (!nf_flow_offload_stats_wq)
1189 destroy_workqueue(nf_flow_offload_del_wq);
1191 destroy_workqueue(nf_flow_offload_add_wq);
1195 void nf_flow_table_offload_exit(void)
1197 destroy_workqueue(nf_flow_offload_add_wq);
1198 destroy_workqueue(nf_flow_offload_del_wq);
1199 destroy_workqueue(nf_flow_offload_stats_wq);