1 // SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
3 * net/sched/act_ct.c Connection Tracking action
5 * Authors: Paul Blakey <paulb@mellanox.com>
6 * Yossi Kuperman <yossiku@mellanox.com>
7 * Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
10 #include <linux/module.h>
11 #include <linux/init.h>
12 #include <linux/kernel.h>
13 #include <linux/skbuff.h>
14 #include <linux/rtnetlink.h>
15 #include <linux/pkt_cls.h>
17 #include <linux/ipv6.h>
18 #include <linux/rhashtable.h>
19 #include <net/netlink.h>
20 #include <net/pkt_sched.h>
21 #include <net/pkt_cls.h>
22 #include <net/act_api.h>
24 #include <net/ipv6_frag.h>
25 #include <uapi/linux/tc_act/tc_ct.h>
26 #include <net/tc_act/tc_ct.h>
27 #include <net/tc_wrapper.h>
29 #include <net/netfilter/nf_flow_table.h>
30 #include <net/netfilter/nf_conntrack.h>
31 #include <net/netfilter/nf_conntrack_core.h>
32 #include <net/netfilter/nf_conntrack_zones.h>
33 #include <net/netfilter/nf_conntrack_helper.h>
34 #include <net/netfilter/nf_conntrack_acct.h>
35 #include <net/netfilter/ipv6/nf_defrag_ipv6.h>
36 #include <net/netfilter/nf_conntrack_act_ct.h>
37 #include <net/netfilter/nf_conntrack_seqadj.h>
38 #include <uapi/linux/netfilter/nf_nat.h>
40 static struct workqueue_struct *act_ct_wq;
41 static struct rhashtable zones_ht;
42 static DEFINE_MUTEX(zones_mutex);
44 struct tcf_ct_flow_table {
45 struct rhash_head node; /* In zones tables */
47 struct rcu_work rwork;
48 struct nf_flowtable nf_ft;
55 static const struct rhashtable_params zones_params = {
56 .head_offset = offsetof(struct tcf_ct_flow_table, node),
57 .key_offset = offsetof(struct tcf_ct_flow_table, zone),
58 .key_len = sizeof_field(struct tcf_ct_flow_table, zone),
59 .automatic_shrinking = true,
62 static struct flow_action_entry *
63 tcf_ct_flow_table_flow_action_get_next(struct flow_action *flow_action)
65 int i = flow_action->num_entries++;
67 return &flow_action->entries[i];
70 static void tcf_ct_add_mangle_action(struct flow_action *action,
71 enum flow_action_mangle_base htype,
76 struct flow_action_entry *entry;
78 entry = tcf_ct_flow_table_flow_action_get_next(action);
79 entry->id = FLOW_ACTION_MANGLE;
80 entry->mangle.htype = htype;
81 entry->mangle.mask = ~mask;
82 entry->mangle.offset = offset;
83 entry->mangle.val = val;
86 /* The following nat helper functions check if the inverted reverse tuple
87 * (target) is different then the current dir tuple - meaning nat for ports
88 * and/or ip is needed, and add the relevant mangle actions.
91 tcf_ct_flow_table_add_action_nat_ipv4(const struct nf_conntrack_tuple *tuple,
92 struct nf_conntrack_tuple target,
93 struct flow_action *action)
95 if (memcmp(&target.src.u3, &tuple->src.u3, sizeof(target.src.u3)))
96 tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_IP4,
97 offsetof(struct iphdr, saddr),
99 be32_to_cpu(target.src.u3.ip));
100 if (memcmp(&target.dst.u3, &tuple->dst.u3, sizeof(target.dst.u3)))
101 tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_IP4,
102 offsetof(struct iphdr, daddr),
104 be32_to_cpu(target.dst.u3.ip));
108 tcf_ct_add_ipv6_addr_mangle_action(struct flow_action *action,
109 union nf_inet_addr *addr,
114 for (i = 0; i < sizeof(struct in6_addr) / sizeof(u32); i++)
115 tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_IP6,
116 i * sizeof(u32) + offset,
117 0xFFFFFFFF, be32_to_cpu(addr->ip6[i]));
121 tcf_ct_flow_table_add_action_nat_ipv6(const struct nf_conntrack_tuple *tuple,
122 struct nf_conntrack_tuple target,
123 struct flow_action *action)
125 if (memcmp(&target.src.u3, &tuple->src.u3, sizeof(target.src.u3)))
126 tcf_ct_add_ipv6_addr_mangle_action(action, &target.src.u3,
127 offsetof(struct ipv6hdr,
129 if (memcmp(&target.dst.u3, &tuple->dst.u3, sizeof(target.dst.u3)))
130 tcf_ct_add_ipv6_addr_mangle_action(action, &target.dst.u3,
131 offsetof(struct ipv6hdr,
136 tcf_ct_flow_table_add_action_nat_tcp(const struct nf_conntrack_tuple *tuple,
137 struct nf_conntrack_tuple target,
138 struct flow_action *action)
140 __be16 target_src = target.src.u.tcp.port;
141 __be16 target_dst = target.dst.u.tcp.port;
143 if (target_src != tuple->src.u.tcp.port)
144 tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_TCP,
145 offsetof(struct tcphdr, source),
146 0xFFFF, be16_to_cpu(target_src));
147 if (target_dst != tuple->dst.u.tcp.port)
148 tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_TCP,
149 offsetof(struct tcphdr, dest),
150 0xFFFF, be16_to_cpu(target_dst));
154 tcf_ct_flow_table_add_action_nat_udp(const struct nf_conntrack_tuple *tuple,
155 struct nf_conntrack_tuple target,
156 struct flow_action *action)
158 __be16 target_src = target.src.u.udp.port;
159 __be16 target_dst = target.dst.u.udp.port;
161 if (target_src != tuple->src.u.udp.port)
162 tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_UDP,
163 offsetof(struct udphdr, source),
164 0xFFFF, be16_to_cpu(target_src));
165 if (target_dst != tuple->dst.u.udp.port)
166 tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_UDP,
167 offsetof(struct udphdr, dest),
168 0xFFFF, be16_to_cpu(target_dst));
171 static void tcf_ct_flow_table_add_action_meta(struct nf_conn *ct,
172 enum ip_conntrack_dir dir,
173 enum ip_conntrack_info ctinfo,
174 struct flow_action *action)
176 struct nf_conn_labels *ct_labels;
177 struct flow_action_entry *entry;
180 entry = tcf_ct_flow_table_flow_action_get_next(action);
181 entry->id = FLOW_ACTION_CT_METADATA;
182 #if IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)
183 entry->ct_metadata.mark = READ_ONCE(ct->mark);
185 /* aligns with the CT reference on the SKB nf_ct_set */
186 entry->ct_metadata.cookie = (unsigned long)ct | ctinfo;
187 entry->ct_metadata.orig_dir = dir == IP_CT_DIR_ORIGINAL;
189 act_ct_labels = entry->ct_metadata.labels;
190 ct_labels = nf_ct_labels_find(ct);
192 memcpy(act_ct_labels, ct_labels->bits, NF_CT_LABELS_MAX_SIZE);
194 memset(act_ct_labels, 0, NF_CT_LABELS_MAX_SIZE);
197 static int tcf_ct_flow_table_add_action_nat(struct net *net,
199 enum ip_conntrack_dir dir,
200 struct flow_action *action)
202 const struct nf_conntrack_tuple *tuple = &ct->tuplehash[dir].tuple;
203 struct nf_conntrack_tuple target;
205 if (!(ct->status & IPS_NAT_MASK))
208 nf_ct_invert_tuple(&target, &ct->tuplehash[!dir].tuple);
210 switch (tuple->src.l3num) {
212 tcf_ct_flow_table_add_action_nat_ipv4(tuple, target,
216 tcf_ct_flow_table_add_action_nat_ipv6(tuple, target,
223 switch (nf_ct_protonum(ct)) {
225 tcf_ct_flow_table_add_action_nat_tcp(tuple, target, action);
228 tcf_ct_flow_table_add_action_nat_udp(tuple, target, action);
237 static int tcf_ct_flow_table_fill_actions(struct net *net,
238 struct flow_offload *flow,
239 enum flow_offload_tuple_dir tdir,
240 struct nf_flow_rule *flow_rule)
242 struct flow_action *action = &flow_rule->rule->action;
243 int num_entries = action->num_entries;
244 struct nf_conn *ct = flow->ct;
245 enum ip_conntrack_info ctinfo;
246 enum ip_conntrack_dir dir;
250 case FLOW_OFFLOAD_DIR_ORIGINAL:
251 dir = IP_CT_DIR_ORIGINAL;
252 ctinfo = test_bit(IPS_SEEN_REPLY_BIT, &ct->status) ?
253 IP_CT_ESTABLISHED : IP_CT_NEW;
254 if (ctinfo == IP_CT_ESTABLISHED)
255 set_bit(NF_FLOW_HW_ESTABLISHED, &flow->flags);
257 case FLOW_OFFLOAD_DIR_REPLY:
258 dir = IP_CT_DIR_REPLY;
259 ctinfo = IP_CT_ESTABLISHED_REPLY;
265 err = tcf_ct_flow_table_add_action_nat(net, ct, dir, action);
269 tcf_ct_flow_table_add_action_meta(ct, dir, ctinfo, action);
273 /* Clear filled actions */
274 for (i = num_entries; i < action->num_entries; i++)
275 memset(&action->entries[i], 0, sizeof(action->entries[i]));
276 action->num_entries = num_entries;
281 static bool tcf_ct_flow_is_outdated(const struct flow_offload *flow)
283 return test_bit(IPS_SEEN_REPLY_BIT, &flow->ct->status) &&
284 test_bit(IPS_HW_OFFLOAD_BIT, &flow->ct->status) &&
285 !test_bit(NF_FLOW_HW_PENDING, &flow->flags) &&
286 !test_bit(NF_FLOW_HW_ESTABLISHED, &flow->flags);
289 static struct nf_flowtable_type flowtable_ct = {
290 .gc = tcf_ct_flow_is_outdated,
291 .action = tcf_ct_flow_table_fill_actions,
292 .owner = THIS_MODULE,
295 static int tcf_ct_flow_table_get(struct net *net, struct tcf_ct_params *params)
297 struct tcf_ct_flow_table *ct_ft;
300 mutex_lock(&zones_mutex);
301 ct_ft = rhashtable_lookup_fast(&zones_ht, ¶ms->zone, zones_params);
302 if (ct_ft && refcount_inc_not_zero(&ct_ft->ref))
305 ct_ft = kzalloc(sizeof(*ct_ft), GFP_KERNEL);
308 refcount_set(&ct_ft->ref, 1);
310 ct_ft->zone = params->zone;
311 err = rhashtable_insert_fast(&zones_ht, &ct_ft->node, zones_params);
315 ct_ft->nf_ft.type = &flowtable_ct;
316 ct_ft->nf_ft.flags |= NF_FLOWTABLE_HW_OFFLOAD |
317 NF_FLOWTABLE_COUNTER;
318 err = nf_flow_table_init(&ct_ft->nf_ft);
321 write_pnet(&ct_ft->nf_ft.net, net);
323 __module_get(THIS_MODULE);
325 params->ct_ft = ct_ft;
326 params->nf_ft = &ct_ft->nf_ft;
327 mutex_unlock(&zones_mutex);
332 rhashtable_remove_fast(&zones_ht, &ct_ft->node, zones_params);
336 mutex_unlock(&zones_mutex);
340 static void tcf_ct_flow_table_cleanup_work(struct work_struct *work)
342 struct flow_block_cb *block_cb, *tmp_cb;
343 struct tcf_ct_flow_table *ct_ft;
344 struct flow_block *block;
346 ct_ft = container_of(to_rcu_work(work), struct tcf_ct_flow_table,
348 nf_flow_table_free(&ct_ft->nf_ft);
350 /* Remove any remaining callbacks before cleanup */
351 block = &ct_ft->nf_ft.flow_block;
352 down_write(&ct_ft->nf_ft.flow_block_lock);
353 list_for_each_entry_safe(block_cb, tmp_cb, &block->cb_list, list) {
354 list_del(&block_cb->list);
355 flow_block_cb_free(block_cb);
357 up_write(&ct_ft->nf_ft.flow_block_lock);
360 module_put(THIS_MODULE);
363 static void tcf_ct_flow_table_put(struct tcf_ct_flow_table *ct_ft)
365 if (refcount_dec_and_test(&ct_ft->ref)) {
366 rhashtable_remove_fast(&zones_ht, &ct_ft->node, zones_params);
367 INIT_RCU_WORK(&ct_ft->rwork, tcf_ct_flow_table_cleanup_work);
368 queue_rcu_work(act_ct_wq, &ct_ft->rwork);
372 static void tcf_ct_flow_tc_ifidx(struct flow_offload *entry,
373 struct nf_conn_act_ct_ext *act_ct_ext, u8 dir)
375 entry->tuplehash[dir].tuple.xmit_type = FLOW_OFFLOAD_XMIT_TC;
376 entry->tuplehash[dir].tuple.tc.iifidx = act_ct_ext->ifindex[dir];
379 static void tcf_ct_flow_table_add(struct tcf_ct_flow_table *ct_ft,
381 bool tcp, bool bidirectional)
383 struct nf_conn_act_ct_ext *act_ct_ext;
384 struct flow_offload *entry;
387 if (test_and_set_bit(IPS_OFFLOAD_BIT, &ct->status))
390 entry = flow_offload_alloc(ct);
397 ct->proto.tcp.seen[0].flags |= IP_CT_TCP_FLAG_BE_LIBERAL;
398 ct->proto.tcp.seen[1].flags |= IP_CT_TCP_FLAG_BE_LIBERAL;
401 __set_bit(NF_FLOW_HW_BIDIRECTIONAL, &entry->flags);
403 act_ct_ext = nf_conn_act_ct_ext_find(ct);
405 tcf_ct_flow_tc_ifidx(entry, act_ct_ext, FLOW_OFFLOAD_DIR_ORIGINAL);
406 tcf_ct_flow_tc_ifidx(entry, act_ct_ext, FLOW_OFFLOAD_DIR_REPLY);
409 err = flow_offload_add(&ct_ft->nf_ft, entry);
416 flow_offload_free(entry);
418 clear_bit(IPS_OFFLOAD_BIT, &ct->status);
421 static void tcf_ct_flow_table_process_conn(struct tcf_ct_flow_table *ct_ft,
423 enum ip_conntrack_info ctinfo)
425 bool tcp = false, bidirectional = true;
427 switch (nf_ct_protonum(ct)) {
429 if ((ctinfo != IP_CT_ESTABLISHED &&
430 ctinfo != IP_CT_ESTABLISHED_REPLY) ||
431 !test_bit(IPS_ASSURED_BIT, &ct->status) ||
432 ct->proto.tcp.state != TCP_CONNTRACK_ESTABLISHED)
438 if (!nf_ct_is_confirmed(ct))
440 if (!test_bit(IPS_ASSURED_BIT, &ct->status))
441 bidirectional = false;
443 #ifdef CONFIG_NF_CT_PROTO_GRE
445 struct nf_conntrack_tuple *tuple;
447 if ((ctinfo != IP_CT_ESTABLISHED &&
448 ctinfo != IP_CT_ESTABLISHED_REPLY) ||
449 !test_bit(IPS_ASSURED_BIT, &ct->status) ||
450 ct->status & IPS_NAT_MASK)
453 tuple = &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple;
454 /* No support for GRE v1 */
455 if (tuple->src.u.gre.key || tuple->dst.u.gre.key)
464 if (nf_ct_ext_exist(ct, NF_CT_EXT_HELPER) ||
465 ct->status & IPS_SEQ_ADJUST)
468 tcf_ct_flow_table_add(ct_ft, ct, tcp, bidirectional);
472 tcf_ct_flow_table_fill_tuple_ipv4(struct sk_buff *skb,
473 struct flow_offload_tuple *tuple,
474 struct tcphdr **tcph)
476 struct flow_ports *ports;
482 if (!pskb_network_may_pull(skb, sizeof(*iph)))
486 thoff = iph->ihl * 4;
488 if (ip_is_fragment(iph) ||
489 unlikely(thoff != sizeof(struct iphdr)))
492 ipproto = iph->protocol;
495 hdrsize = sizeof(struct tcphdr);
498 hdrsize = sizeof(*ports);
500 #ifdef CONFIG_NF_CT_PROTO_GRE
502 hdrsize = sizeof(struct gre_base_hdr);
512 if (!pskb_network_may_pull(skb, thoff + hdrsize))
517 *tcph = (void *)(skb_network_header(skb) + thoff);
520 ports = (struct flow_ports *)(skb_network_header(skb) + thoff);
521 tuple->src_port = ports->source;
522 tuple->dst_port = ports->dest;
525 struct gre_base_hdr *greh;
527 greh = (struct gre_base_hdr *)(skb_network_header(skb) + thoff);
528 if ((greh->flags & GRE_VERSION) != GRE_VERSION_0)
536 tuple->src_v4.s_addr = iph->saddr;
537 tuple->dst_v4.s_addr = iph->daddr;
538 tuple->l3proto = AF_INET;
539 tuple->l4proto = ipproto;
545 tcf_ct_flow_table_fill_tuple_ipv6(struct sk_buff *skb,
546 struct flow_offload_tuple *tuple,
547 struct tcphdr **tcph)
549 struct flow_ports *ports;
550 struct ipv6hdr *ip6h;
555 if (!pskb_network_may_pull(skb, sizeof(*ip6h)))
558 ip6h = ipv6_hdr(skb);
559 thoff = sizeof(*ip6h);
561 nexthdr = ip6h->nexthdr;
564 hdrsize = sizeof(struct tcphdr);
567 hdrsize = sizeof(*ports);
569 #ifdef CONFIG_NF_CT_PROTO_GRE
571 hdrsize = sizeof(struct gre_base_hdr);
578 if (ip6h->hop_limit <= 1)
581 if (!pskb_network_may_pull(skb, thoff + hdrsize))
586 *tcph = (void *)(skb_network_header(skb) + thoff);
589 ports = (struct flow_ports *)(skb_network_header(skb) + thoff);
590 tuple->src_port = ports->source;
591 tuple->dst_port = ports->dest;
594 struct gre_base_hdr *greh;
596 greh = (struct gre_base_hdr *)(skb_network_header(skb) + thoff);
597 if ((greh->flags & GRE_VERSION) != GRE_VERSION_0)
603 ip6h = ipv6_hdr(skb);
605 tuple->src_v6 = ip6h->saddr;
606 tuple->dst_v6 = ip6h->daddr;
607 tuple->l3proto = AF_INET6;
608 tuple->l4proto = nexthdr;
613 static bool tcf_ct_flow_table_lookup(struct tcf_ct_params *p,
617 struct nf_flowtable *nf_ft = &p->ct_ft->nf_ft;
618 struct flow_offload_tuple_rhash *tuplehash;
619 struct flow_offload_tuple tuple = {};
620 enum ip_conntrack_info ctinfo;
621 struct tcphdr *tcph = NULL;
622 bool force_refresh = false;
623 struct flow_offload *flow;
629 if (!tcf_ct_flow_table_fill_tuple_ipv4(skb, &tuple, &tcph))
633 if (!tcf_ct_flow_table_fill_tuple_ipv6(skb, &tuple, &tcph))
640 tuplehash = flow_offload_lookup(nf_ft, &tuple);
644 dir = tuplehash->tuple.dir;
645 flow = container_of(tuplehash, struct flow_offload, tuplehash[dir]);
648 if (dir == FLOW_OFFLOAD_DIR_REPLY &&
649 !test_bit(NF_FLOW_HW_BIDIRECTIONAL, &flow->flags)) {
650 /* Only offload reply direction after connection became
653 if (test_bit(IPS_ASSURED_BIT, &ct->status))
654 set_bit(NF_FLOW_HW_BIDIRECTIONAL, &flow->flags);
655 else if (test_bit(NF_FLOW_HW_ESTABLISHED, &flow->flags))
656 /* If flow_table flow has already been updated to the
657 * established state, then don't refresh.
660 force_refresh = true;
663 if (tcph && (unlikely(tcph->fin || tcph->rst))) {
664 flow_offload_teardown(flow);
668 if (dir == FLOW_OFFLOAD_DIR_ORIGINAL)
669 ctinfo = test_bit(IPS_SEEN_REPLY_BIT, &ct->status) ?
670 IP_CT_ESTABLISHED : IP_CT_NEW;
672 ctinfo = IP_CT_ESTABLISHED_REPLY;
674 flow_offload_refresh(nf_ft, flow, force_refresh);
675 if (!test_bit(IPS_ASSURED_BIT, &ct->status)) {
676 /* Process this flow in SW to allow promoting to ASSURED */
680 nf_conntrack_get(&ct->ct_general);
681 nf_ct_set(skb, ct, ctinfo);
682 if (nf_ft->flags & NF_FLOWTABLE_COUNTER)
683 nf_ct_acct_update(ct, dir, skb->len);
688 static int tcf_ct_flow_tables_init(void)
690 return rhashtable_init(&zones_ht, &zones_params);
693 static void tcf_ct_flow_tables_uninit(void)
695 rhashtable_destroy(&zones_ht);
698 static struct tc_action_ops act_ct_ops;
700 struct tc_ct_action_net {
701 struct tc_action_net tn; /* Must be first */
705 /* Determine whether skb->_nfct is equal to the result of conntrack lookup. */
706 static bool tcf_ct_skb_nfct_cached(struct net *net, struct sk_buff *skb,
707 struct tcf_ct_params *p)
709 enum ip_conntrack_info ctinfo;
712 ct = nf_ct_get(skb, &ctinfo);
715 if (!net_eq(net, read_pnet(&ct->ct_net)))
717 if (nf_ct_zone(ct)->id != p->zone)
720 struct nf_conn_help *help;
722 help = nf_ct_ext_find(ct, NF_CT_EXT_HELPER);
723 if (help && rcu_access_pointer(help->helper) != p->helper)
727 /* Force conntrack entry direction. */
728 if ((p->ct_action & TCA_CT_ACT_FORCE) &&
729 CTINFO2DIR(ctinfo) != IP_CT_DIR_ORIGINAL) {
730 if (nf_ct_is_confirmed(ct))
740 nf_ct_set(skb, NULL, IP_CT_UNTRACKED);
745 static u8 tcf_ct_skb_nf_family(struct sk_buff *skb)
747 u8 family = NFPROTO_UNSPEC;
749 switch (skb_protocol(skb, true)) {
750 case htons(ETH_P_IP):
751 family = NFPROTO_IPV4;
753 case htons(ETH_P_IPV6):
754 family = NFPROTO_IPV6;
763 static int tcf_ct_ipv4_is_fragment(struct sk_buff *skb, bool *frag)
767 len = skb_network_offset(skb) + sizeof(struct iphdr);
768 if (unlikely(skb->len < len))
770 if (unlikely(!pskb_may_pull(skb, len)))
773 *frag = ip_is_fragment(ip_hdr(skb));
777 static int tcf_ct_ipv6_is_fragment(struct sk_buff *skb, bool *frag)
779 unsigned int flags = 0, len, payload_ofs = 0;
780 unsigned short frag_off;
783 len = skb_network_offset(skb) + sizeof(struct ipv6hdr);
784 if (unlikely(skb->len < len))
786 if (unlikely(!pskb_may_pull(skb, len)))
789 nexthdr = ipv6_find_hdr(skb, &payload_ofs, -1, &frag_off, &flags);
790 if (unlikely(nexthdr < 0))
793 *frag = flags & IP6_FH_F_FRAG;
797 static int tcf_ct_handle_fragments(struct net *net, struct sk_buff *skb,
798 u8 family, u16 zone, bool *defrag)
800 enum ip_conntrack_info ctinfo;
807 /* Previously seen (loopback)? Ignore. */
808 ct = nf_ct_get(skb, &ctinfo);
809 if ((ct && !nf_ct_is_template(ct)) || ctinfo == IP_CT_UNTRACKED)
812 if (family == NFPROTO_IPV4)
813 err = tcf_ct_ipv4_is_fragment(skb, &frag);
815 err = tcf_ct_ipv6_is_fragment(skb, &frag);
820 err = nf_ct_handle_fragments(net, skb, zone, family, &proto, &mru);
825 tc_skb_cb(skb)->mru = mru;
830 static void tcf_ct_params_free(struct tcf_ct_params *params)
832 if (params->helper) {
833 #if IS_ENABLED(CONFIG_NF_NAT)
834 if (params->ct_action & TCA_CT_ACT_NAT)
835 nf_nat_helper_put(params->helper);
837 nf_conntrack_helper_put(params->helper);
840 tcf_ct_flow_table_put(params->ct_ft);
842 nf_ct_put(params->tmpl);
846 static void tcf_ct_params_free_rcu(struct rcu_head *head)
848 struct tcf_ct_params *params;
850 params = container_of(head, struct tcf_ct_params, rcu);
851 tcf_ct_params_free(params);
854 static void tcf_ct_act_set_mark(struct nf_conn *ct, u32 mark, u32 mask)
856 #if IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)
862 new_mark = mark | (READ_ONCE(ct->mark) & ~(mask));
863 if (READ_ONCE(ct->mark) != new_mark) {
864 WRITE_ONCE(ct->mark, new_mark);
865 if (nf_ct_is_confirmed(ct))
866 nf_conntrack_event_cache(IPCT_MARK, ct);
871 static void tcf_ct_act_set_labels(struct nf_conn *ct,
875 #if IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)
876 size_t labels_sz = sizeof_field(struct tcf_ct_params, labels);
878 if (!memchr_inv(labels_m, 0, labels_sz))
881 nf_connlabels_replace(ct, labels, labels_m, 4);
885 static int tcf_ct_act_nat(struct sk_buff *skb,
887 enum ip_conntrack_info ctinfo,
889 struct nf_nat_range2 *range,
892 #if IS_ENABLED(CONFIG_NF_NAT)
895 if (!(ct_action & TCA_CT_ACT_NAT))
897 if (ct_action & TCA_CT_ACT_NAT_SRC)
898 action |= BIT(NF_NAT_MANIP_SRC);
899 if (ct_action & TCA_CT_ACT_NAT_DST)
900 action |= BIT(NF_NAT_MANIP_DST);
902 err = nf_ct_nat(skb, ct, ctinfo, &action, range, commit);
904 if (action & BIT(NF_NAT_MANIP_SRC))
905 tc_skb_cb(skb)->post_ct_snat = 1;
906 if (action & BIT(NF_NAT_MANIP_DST))
907 tc_skb_cb(skb)->post_ct_dnat = 1;
915 TC_INDIRECT_SCOPE int tcf_ct_act(struct sk_buff *skb, const struct tc_action *a,
916 struct tcf_result *res)
918 struct net *net = dev_net(skb->dev);
919 enum ip_conntrack_info ctinfo;
920 struct tcf_ct *c = to_ct(a);
921 struct nf_conn *tmpl = NULL;
922 struct nf_hook_state state;
923 bool cached, commit, clear;
924 int nh_ofs, err, retval;
925 struct tcf_ct_params *p;
926 bool add_helper = false;
927 bool skip_add = false;
932 p = rcu_dereference_bh(c->params);
934 retval = READ_ONCE(c->tcf_action);
935 commit = p->ct_action & TCA_CT_ACT_COMMIT;
936 clear = p->ct_action & TCA_CT_ACT_CLEAR;
939 tcf_lastuse_update(&c->tcf_tm);
940 tcf_action_update_bstats(&c->common, skb);
943 tc_skb_cb(skb)->post_ct = false;
944 ct = nf_ct_get(skb, &ctinfo);
947 nf_ct_set(skb, NULL, IP_CT_UNTRACKED);
953 family = tcf_ct_skb_nf_family(skb);
954 if (family == NFPROTO_UNSPEC)
957 /* The conntrack module expects to be working at L3.
958 * We also try to pull the IPv4/6 header to linear area
960 nh_ofs = skb_network_offset(skb);
961 skb_pull_rcsum(skb, nh_ofs);
962 err = tcf_ct_handle_fragments(net, skb, family, p->zone, &defrag);
963 if (err == -EINPROGRESS) {
964 retval = TC_ACT_STOLEN;
970 err = nf_ct_skb_network_trim(skb, family);
974 /* If we are recirculating packets to match on ct fields and
975 * committing with a separate ct action, then we don't need to
976 * actually run the packet through conntrack twice unless it's for a
979 cached = tcf_ct_skb_nfct_cached(net, skb, p);
981 if (tcf_ct_flow_table_lookup(p, skb, family)) {
986 /* Associate skb with specified zone. */
988 nf_conntrack_put(skb_nfct(skb));
989 nf_conntrack_get(&tmpl->ct_general);
990 nf_ct_set(skb, tmpl, IP_CT_NEW);
993 state.hook = NF_INET_PRE_ROUTING;
996 err = nf_conntrack_in(skb, &state);
997 if (err != NF_ACCEPT)
1002 ct = nf_ct_get(skb, &ctinfo);
1005 nf_ct_deliver_cached_events(ct);
1006 nf_conn_act_ct_ext_fill(skb, ct, ctinfo);
1008 err = tcf_ct_act_nat(skb, ct, ctinfo, p->ct_action, &p->range, commit);
1009 if (err != NF_ACCEPT)
1012 if (!nf_ct_is_confirmed(ct) && commit && p->helper && !nfct_help(ct)) {
1013 err = __nf_ct_try_assign_helper(ct, p->tmpl, GFP_ATOMIC);
1017 if (p->ct_action & TCA_CT_ACT_NAT && !nfct_seqadj(ct)) {
1018 if (!nfct_seqadj_ext_add(ct))
1023 if (nf_ct_is_confirmed(ct) ? ((!cached && !skip_add) || add_helper) : commit) {
1024 if (nf_ct_helper(skb, ct, ctinfo, family) != NF_ACCEPT)
1029 tcf_ct_act_set_mark(ct, p->mark, p->mark_mask);
1030 tcf_ct_act_set_labels(ct, p->labels, p->labels_mask);
1032 if (!nf_ct_is_confirmed(ct))
1033 nf_conn_act_ct_ext_add(ct);
1035 /* This will take care of sending queued events
1036 * even if the connection is already confirmed.
1038 if (nf_conntrack_confirm(skb) != NF_ACCEPT)
1043 tcf_ct_flow_table_process_conn(p->ct_ft, ct, ctinfo);
1046 skb_push_rcsum(skb, nh_ofs);
1048 tc_skb_cb(skb)->post_ct = true;
1049 tc_skb_cb(skb)->zone = p->zone;
1052 qdisc_skb_cb(skb)->pkt_len = skb->len;
1056 tcf_action_inc_drop_qstats(&c->common);
1060 static const struct nla_policy ct_policy[TCA_CT_MAX + 1] = {
1061 [TCA_CT_ACTION] = { .type = NLA_U16 },
1062 [TCA_CT_PARMS] = NLA_POLICY_EXACT_LEN(sizeof(struct tc_ct)),
1063 [TCA_CT_ZONE] = { .type = NLA_U16 },
1064 [TCA_CT_MARK] = { .type = NLA_U32 },
1065 [TCA_CT_MARK_MASK] = { .type = NLA_U32 },
1066 [TCA_CT_LABELS] = { .type = NLA_BINARY,
1067 .len = 128 / BITS_PER_BYTE },
1068 [TCA_CT_LABELS_MASK] = { .type = NLA_BINARY,
1069 .len = 128 / BITS_PER_BYTE },
1070 [TCA_CT_NAT_IPV4_MIN] = { .type = NLA_U32 },
1071 [TCA_CT_NAT_IPV4_MAX] = { .type = NLA_U32 },
1072 [TCA_CT_NAT_IPV6_MIN] = NLA_POLICY_EXACT_LEN(sizeof(struct in6_addr)),
1073 [TCA_CT_NAT_IPV6_MAX] = NLA_POLICY_EXACT_LEN(sizeof(struct in6_addr)),
1074 [TCA_CT_NAT_PORT_MIN] = { .type = NLA_U16 },
1075 [TCA_CT_NAT_PORT_MAX] = { .type = NLA_U16 },
1076 [TCA_CT_HELPER_NAME] = { .type = NLA_STRING, .len = NF_CT_HELPER_NAME_LEN },
1077 [TCA_CT_HELPER_FAMILY] = { .type = NLA_U8 },
1078 [TCA_CT_HELPER_PROTO] = { .type = NLA_U8 },
1081 static int tcf_ct_fill_params_nat(struct tcf_ct_params *p,
1084 struct netlink_ext_ack *extack)
1086 struct nf_nat_range2 *range;
1088 if (!(p->ct_action & TCA_CT_ACT_NAT))
1091 if (!IS_ENABLED(CONFIG_NF_NAT)) {
1092 NL_SET_ERR_MSG_MOD(extack, "Netfilter nat isn't enabled in kernel");
1096 if (!(p->ct_action & (TCA_CT_ACT_NAT_SRC | TCA_CT_ACT_NAT_DST)))
1099 if ((p->ct_action & TCA_CT_ACT_NAT_SRC) &&
1100 (p->ct_action & TCA_CT_ACT_NAT_DST)) {
1101 NL_SET_ERR_MSG_MOD(extack, "dnat and snat can't be enabled at the same time");
1106 if (tb[TCA_CT_NAT_IPV4_MIN]) {
1107 struct nlattr *max_attr = tb[TCA_CT_NAT_IPV4_MAX];
1109 p->ipv4_range = true;
1110 range->flags |= NF_NAT_RANGE_MAP_IPS;
1111 range->min_addr.ip =
1112 nla_get_in_addr(tb[TCA_CT_NAT_IPV4_MIN]);
1114 range->max_addr.ip = max_attr ?
1115 nla_get_in_addr(max_attr) :
1117 } else if (tb[TCA_CT_NAT_IPV6_MIN]) {
1118 struct nlattr *max_attr = tb[TCA_CT_NAT_IPV6_MAX];
1120 p->ipv4_range = false;
1121 range->flags |= NF_NAT_RANGE_MAP_IPS;
1122 range->min_addr.in6 =
1123 nla_get_in6_addr(tb[TCA_CT_NAT_IPV6_MIN]);
1125 range->max_addr.in6 = max_attr ?
1126 nla_get_in6_addr(max_attr) :
1127 range->min_addr.in6;
1130 if (tb[TCA_CT_NAT_PORT_MIN]) {
1131 range->flags |= NF_NAT_RANGE_PROTO_SPECIFIED;
1132 range->min_proto.all = nla_get_be16(tb[TCA_CT_NAT_PORT_MIN]);
1134 range->max_proto.all = tb[TCA_CT_NAT_PORT_MAX] ?
1135 nla_get_be16(tb[TCA_CT_NAT_PORT_MAX]) :
1136 range->min_proto.all;
1142 static void tcf_ct_set_key_val(struct nlattr **tb,
1143 void *val, int val_type,
1144 void *mask, int mask_type,
1149 nla_memcpy(val, tb[val_type], len);
1154 if (mask_type == TCA_CT_UNSPEC || !tb[mask_type])
1155 memset(mask, 0xff, len);
1157 nla_memcpy(mask, tb[mask_type], len);
1160 static int tcf_ct_fill_params(struct net *net,
1161 struct tcf_ct_params *p,
1164 struct netlink_ext_ack *extack)
1166 struct tc_ct_action_net *tn = net_generic(net, act_ct_ops.net_id);
1167 struct nf_conntrack_zone zone;
1168 int err, family, proto, len;
1169 struct nf_conn *tmpl;
1172 p->zone = NF_CT_DEFAULT_ZONE_ID;
1174 tcf_ct_set_key_val(tb,
1175 &p->ct_action, TCA_CT_ACTION,
1176 NULL, TCA_CT_UNSPEC,
1177 sizeof(p->ct_action));
1179 if (p->ct_action & TCA_CT_ACT_CLEAR)
1182 err = tcf_ct_fill_params_nat(p, parm, tb, extack);
1186 if (tb[TCA_CT_MARK]) {
1187 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) {
1188 NL_SET_ERR_MSG_MOD(extack, "Conntrack mark isn't enabled.");
1191 tcf_ct_set_key_val(tb,
1192 &p->mark, TCA_CT_MARK,
1193 &p->mark_mask, TCA_CT_MARK_MASK,
1197 if (tb[TCA_CT_LABELS]) {
1198 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) {
1199 NL_SET_ERR_MSG_MOD(extack, "Conntrack labels isn't enabled.");
1204 NL_SET_ERR_MSG_MOD(extack, "Failed to set connlabel length");
1207 tcf_ct_set_key_val(tb,
1208 p->labels, TCA_CT_LABELS,
1209 p->labels_mask, TCA_CT_LABELS_MASK,
1213 if (tb[TCA_CT_ZONE]) {
1214 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) {
1215 NL_SET_ERR_MSG_MOD(extack, "Conntrack zones isn't enabled.");
1219 tcf_ct_set_key_val(tb,
1220 &p->zone, TCA_CT_ZONE,
1221 NULL, TCA_CT_UNSPEC,
1225 nf_ct_zone_init(&zone, p->zone, NF_CT_DEFAULT_ZONE_DIR, 0);
1226 tmpl = nf_ct_tmpl_alloc(net, &zone, GFP_KERNEL);
1228 NL_SET_ERR_MSG_MOD(extack, "Failed to allocate conntrack template");
1232 if (tb[TCA_CT_HELPER_NAME]) {
1233 name = nla_data(tb[TCA_CT_HELPER_NAME]);
1234 len = nla_len(tb[TCA_CT_HELPER_NAME]);
1235 if (len > 16 || name[len - 1] != '\0') {
1236 NL_SET_ERR_MSG_MOD(extack, "Failed to parse helper name.");
1240 family = tb[TCA_CT_HELPER_FAMILY] ? nla_get_u8(tb[TCA_CT_HELPER_FAMILY]) : AF_INET;
1241 proto = tb[TCA_CT_HELPER_PROTO] ? nla_get_u8(tb[TCA_CT_HELPER_PROTO]) : IPPROTO_TCP;
1242 err = nf_ct_add_helper(tmpl, name, family, proto,
1243 p->ct_action & TCA_CT_ACT_NAT, &p->helper);
1245 NL_SET_ERR_MSG_MOD(extack, "Failed to add helper");
1250 __set_bit(IPS_CONFIRMED_BIT, &tmpl->status);
1258 static int tcf_ct_init(struct net *net, struct nlattr *nla,
1259 struct nlattr *est, struct tc_action **a,
1260 struct tcf_proto *tp, u32 flags,
1261 struct netlink_ext_ack *extack)
1263 struct tc_action_net *tn = net_generic(net, act_ct_ops.net_id);
1264 bool bind = flags & TCA_ACT_FLAGS_BIND;
1265 struct tcf_ct_params *params = NULL;
1266 struct nlattr *tb[TCA_CT_MAX + 1];
1267 struct tcf_chain *goto_ch = NULL;
1274 NL_SET_ERR_MSG_MOD(extack, "Ct requires attributes to be passed");
1278 err = nla_parse_nested(tb, TCA_CT_MAX, nla, ct_policy, extack);
1282 if (!tb[TCA_CT_PARMS]) {
1283 NL_SET_ERR_MSG_MOD(extack, "Missing required ct parameters");
1286 parm = nla_data(tb[TCA_CT_PARMS]);
1287 index = parm->index;
1288 err = tcf_idr_check_alloc(tn, &index, a, bind);
1293 err = tcf_idr_create_from_flags(tn, index, est, a,
1294 &act_ct_ops, bind, flags);
1296 tcf_idr_cleanup(tn, index);
1299 res = ACT_P_CREATED;
1304 if (!(flags & TCA_ACT_FLAGS_REPLACE)) {
1305 tcf_idr_release(*a, bind);
1309 err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
1315 params = kzalloc(sizeof(*params), GFP_KERNEL);
1316 if (unlikely(!params)) {
1321 err = tcf_ct_fill_params(net, params, parm, tb, extack);
1325 err = tcf_ct_flow_table_get(net, params);
1329 spin_lock_bh(&c->tcf_lock);
1330 goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
1331 params = rcu_replace_pointer(c->params, params,
1332 lockdep_is_held(&c->tcf_lock));
1333 spin_unlock_bh(&c->tcf_lock);
1336 tcf_chain_put_by_act(goto_ch);
1338 call_rcu(¶ms->rcu, tcf_ct_params_free_rcu);
1344 tcf_chain_put_by_act(goto_ch);
1346 tcf_ct_params_free(params);
1347 tcf_idr_release(*a, bind);
1351 static void tcf_ct_cleanup(struct tc_action *a)
1353 struct tcf_ct_params *params;
1354 struct tcf_ct *c = to_ct(a);
1356 params = rcu_dereference_protected(c->params, 1);
1358 call_rcu(¶ms->rcu, tcf_ct_params_free_rcu);
1361 static int tcf_ct_dump_key_val(struct sk_buff *skb,
1362 void *val, int val_type,
1363 void *mask, int mask_type,
1368 if (mask && !memchr_inv(mask, 0, len))
1371 err = nla_put(skb, val_type, len, val);
1375 if (mask_type != TCA_CT_UNSPEC) {
1376 err = nla_put(skb, mask_type, len, mask);
1384 static int tcf_ct_dump_nat(struct sk_buff *skb, struct tcf_ct_params *p)
1386 struct nf_nat_range2 *range = &p->range;
1388 if (!(p->ct_action & TCA_CT_ACT_NAT))
1391 if (!(p->ct_action & (TCA_CT_ACT_NAT_SRC | TCA_CT_ACT_NAT_DST)))
1394 if (range->flags & NF_NAT_RANGE_MAP_IPS) {
1395 if (p->ipv4_range) {
1396 if (nla_put_in_addr(skb, TCA_CT_NAT_IPV4_MIN,
1397 range->min_addr.ip))
1399 if (nla_put_in_addr(skb, TCA_CT_NAT_IPV4_MAX,
1400 range->max_addr.ip))
1403 if (nla_put_in6_addr(skb, TCA_CT_NAT_IPV6_MIN,
1404 &range->min_addr.in6))
1406 if (nla_put_in6_addr(skb, TCA_CT_NAT_IPV6_MAX,
1407 &range->max_addr.in6))
1412 if (range->flags & NF_NAT_RANGE_PROTO_SPECIFIED) {
1413 if (nla_put_be16(skb, TCA_CT_NAT_PORT_MIN,
1414 range->min_proto.all))
1416 if (nla_put_be16(skb, TCA_CT_NAT_PORT_MAX,
1417 range->max_proto.all))
1424 static int tcf_ct_dump_helper(struct sk_buff *skb, struct nf_conntrack_helper *helper)
1429 if (nla_put_string(skb, TCA_CT_HELPER_NAME, helper->name) ||
1430 nla_put_u8(skb, TCA_CT_HELPER_FAMILY, helper->tuple.src.l3num) ||
1431 nla_put_u8(skb, TCA_CT_HELPER_PROTO, helper->tuple.dst.protonum))
1437 static inline int tcf_ct_dump(struct sk_buff *skb, struct tc_action *a,
1440 unsigned char *b = skb_tail_pointer(skb);
1441 struct tcf_ct *c = to_ct(a);
1442 struct tcf_ct_params *p;
1444 struct tc_ct opt = {
1445 .index = c->tcf_index,
1446 .refcnt = refcount_read(&c->tcf_refcnt) - ref,
1447 .bindcnt = atomic_read(&c->tcf_bindcnt) - bind,
1451 spin_lock_bh(&c->tcf_lock);
1452 p = rcu_dereference_protected(c->params,
1453 lockdep_is_held(&c->tcf_lock));
1454 opt.action = c->tcf_action;
1456 if (tcf_ct_dump_key_val(skb,
1457 &p->ct_action, TCA_CT_ACTION,
1458 NULL, TCA_CT_UNSPEC,
1459 sizeof(p->ct_action)))
1460 goto nla_put_failure;
1462 if (p->ct_action & TCA_CT_ACT_CLEAR)
1465 if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) &&
1466 tcf_ct_dump_key_val(skb,
1467 &p->mark, TCA_CT_MARK,
1468 &p->mark_mask, TCA_CT_MARK_MASK,
1470 goto nla_put_failure;
1472 if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) &&
1473 tcf_ct_dump_key_val(skb,
1474 p->labels, TCA_CT_LABELS,
1475 p->labels_mask, TCA_CT_LABELS_MASK,
1477 goto nla_put_failure;
1479 if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) &&
1480 tcf_ct_dump_key_val(skb,
1481 &p->zone, TCA_CT_ZONE,
1482 NULL, TCA_CT_UNSPEC,
1484 goto nla_put_failure;
1486 if (tcf_ct_dump_nat(skb, p))
1487 goto nla_put_failure;
1489 if (tcf_ct_dump_helper(skb, p->helper))
1490 goto nla_put_failure;
1493 if (nla_put(skb, TCA_CT_PARMS, sizeof(opt), &opt))
1494 goto nla_put_failure;
1496 tcf_tm_dump(&t, &c->tcf_tm);
1497 if (nla_put_64bit(skb, TCA_CT_TM, sizeof(t), &t, TCA_CT_PAD))
1498 goto nla_put_failure;
1499 spin_unlock_bh(&c->tcf_lock);
1503 spin_unlock_bh(&c->tcf_lock);
1508 static void tcf_stats_update(struct tc_action *a, u64 bytes, u64 packets,
1509 u64 drops, u64 lastuse, bool hw)
1511 struct tcf_ct *c = to_ct(a);
1513 tcf_action_update_stats(a, bytes, packets, drops, hw);
1514 c->tcf_tm.lastuse = max_t(u64, c->tcf_tm.lastuse, lastuse);
1517 static int tcf_ct_offload_act_setup(struct tc_action *act, void *entry_data,
1518 u32 *index_inc, bool bind,
1519 struct netlink_ext_ack *extack)
1522 struct flow_action_entry *entry = entry_data;
1524 entry->id = FLOW_ACTION_CT;
1525 entry->ct.action = tcf_ct_action(act);
1526 entry->ct.zone = tcf_ct_zone(act);
1527 entry->ct.flow_table = tcf_ct_ft(act);
1530 struct flow_offload_action *fl_action = entry_data;
1532 fl_action->id = FLOW_ACTION_CT;
1538 static struct tc_action_ops act_ct_ops = {
1541 .owner = THIS_MODULE,
1543 .dump = tcf_ct_dump,
1544 .init = tcf_ct_init,
1545 .cleanup = tcf_ct_cleanup,
1546 .stats_update = tcf_stats_update,
1547 .offload_act_setup = tcf_ct_offload_act_setup,
1548 .size = sizeof(struct tcf_ct),
1551 static __net_init int ct_init_net(struct net *net)
1553 unsigned int n_bits = sizeof_field(struct tcf_ct_params, labels) * 8;
1554 struct tc_ct_action_net *tn = net_generic(net, act_ct_ops.net_id);
1556 if (nf_connlabels_get(net, n_bits - 1)) {
1558 pr_err("act_ct: Failed to set connlabels length");
1563 return tc_action_net_init(net, &tn->tn, &act_ct_ops);
1566 static void __net_exit ct_exit_net(struct list_head *net_list)
1571 list_for_each_entry(net, net_list, exit_list) {
1572 struct tc_ct_action_net *tn = net_generic(net, act_ct_ops.net_id);
1575 nf_connlabels_put(net);
1579 tc_action_net_exit(net_list, act_ct_ops.net_id);
1582 static struct pernet_operations ct_net_ops = {
1583 .init = ct_init_net,
1584 .exit_batch = ct_exit_net,
1585 .id = &act_ct_ops.net_id,
1586 .size = sizeof(struct tc_ct_action_net),
1589 static int __init ct_init_module(void)
1593 act_ct_wq = alloc_ordered_workqueue("act_ct_workqueue", 0);
1597 err = tcf_ct_flow_tables_init();
1601 err = tcf_register_action(&act_ct_ops, &ct_net_ops);
1605 static_branch_inc(&tcf_frag_xmit_count);
1610 tcf_ct_flow_tables_uninit();
1612 destroy_workqueue(act_ct_wq);
1616 static void __exit ct_cleanup_module(void)
1618 static_branch_dec(&tcf_frag_xmit_count);
1619 tcf_unregister_action(&act_ct_ops, &ct_net_ops);
1620 tcf_ct_flow_tables_uninit();
1621 destroy_workqueue(act_ct_wq);
1624 module_init(ct_init_module);
1625 module_exit(ct_cleanup_module);
1626 MODULE_AUTHOR("Paul Blakey <paulb@mellanox.com>");
1627 MODULE_AUTHOR("Yossi Kuperman <yossiku@mellanox.com>");
1628 MODULE_AUTHOR("Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>");
1629 MODULE_DESCRIPTION("Connection tracking action");
1630 MODULE_LICENSE("GPL v2");