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>
28 #include <net/netfilter/nf_flow_table.h>
29 #include <net/netfilter/nf_conntrack.h>
30 #include <net/netfilter/nf_conntrack_core.h>
31 #include <net/netfilter/nf_conntrack_zones.h>
32 #include <net/netfilter/nf_conntrack_helper.h>
33 #include <net/netfilter/nf_conntrack_acct.h>
34 #include <net/netfilter/ipv6/nf_defrag_ipv6.h>
35 #include <net/netfilter/nf_conntrack_act_ct.h>
36 #include <uapi/linux/netfilter/nf_nat.h>
38 static struct workqueue_struct *act_ct_wq;
39 static struct rhashtable zones_ht;
40 static DEFINE_MUTEX(zones_mutex);
42 struct tcf_ct_flow_table {
43 struct rhash_head node; /* In zones tables */
45 struct rcu_work rwork;
46 struct nf_flowtable nf_ft;
53 static const struct rhashtable_params zones_params = {
54 .head_offset = offsetof(struct tcf_ct_flow_table, node),
55 .key_offset = offsetof(struct tcf_ct_flow_table, zone),
56 .key_len = sizeof_field(struct tcf_ct_flow_table, zone),
57 .automatic_shrinking = true,
60 static struct flow_action_entry *
61 tcf_ct_flow_table_flow_action_get_next(struct flow_action *flow_action)
63 int i = flow_action->num_entries++;
65 return &flow_action->entries[i];
68 static void tcf_ct_add_mangle_action(struct flow_action *action,
69 enum flow_action_mangle_base htype,
74 struct flow_action_entry *entry;
76 entry = tcf_ct_flow_table_flow_action_get_next(action);
77 entry->id = FLOW_ACTION_MANGLE;
78 entry->mangle.htype = htype;
79 entry->mangle.mask = ~mask;
80 entry->mangle.offset = offset;
81 entry->mangle.val = val;
84 /* The following nat helper functions check if the inverted reverse tuple
85 * (target) is different then the current dir tuple - meaning nat for ports
86 * and/or ip is needed, and add the relevant mangle actions.
89 tcf_ct_flow_table_add_action_nat_ipv4(const struct nf_conntrack_tuple *tuple,
90 struct nf_conntrack_tuple target,
91 struct flow_action *action)
93 if (memcmp(&target.src.u3, &tuple->src.u3, sizeof(target.src.u3)))
94 tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_IP4,
95 offsetof(struct iphdr, saddr),
97 be32_to_cpu(target.src.u3.ip));
98 if (memcmp(&target.dst.u3, &tuple->dst.u3, sizeof(target.dst.u3)))
99 tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_IP4,
100 offsetof(struct iphdr, daddr),
102 be32_to_cpu(target.dst.u3.ip));
106 tcf_ct_add_ipv6_addr_mangle_action(struct flow_action *action,
107 union nf_inet_addr *addr,
112 for (i = 0; i < sizeof(struct in6_addr) / sizeof(u32); i++)
113 tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_IP6,
114 i * sizeof(u32) + offset,
115 0xFFFFFFFF, be32_to_cpu(addr->ip6[i]));
119 tcf_ct_flow_table_add_action_nat_ipv6(const struct nf_conntrack_tuple *tuple,
120 struct nf_conntrack_tuple target,
121 struct flow_action *action)
123 if (memcmp(&target.src.u3, &tuple->src.u3, sizeof(target.src.u3)))
124 tcf_ct_add_ipv6_addr_mangle_action(action, &target.src.u3,
125 offsetof(struct ipv6hdr,
127 if (memcmp(&target.dst.u3, &tuple->dst.u3, sizeof(target.dst.u3)))
128 tcf_ct_add_ipv6_addr_mangle_action(action, &target.dst.u3,
129 offsetof(struct ipv6hdr,
134 tcf_ct_flow_table_add_action_nat_tcp(const struct nf_conntrack_tuple *tuple,
135 struct nf_conntrack_tuple target,
136 struct flow_action *action)
138 __be16 target_src = target.src.u.tcp.port;
139 __be16 target_dst = target.dst.u.tcp.port;
141 if (target_src != tuple->src.u.tcp.port)
142 tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_TCP,
143 offsetof(struct tcphdr, source),
144 0xFFFF, be16_to_cpu(target_src));
145 if (target_dst != tuple->dst.u.tcp.port)
146 tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_TCP,
147 offsetof(struct tcphdr, dest),
148 0xFFFF, be16_to_cpu(target_dst));
152 tcf_ct_flow_table_add_action_nat_udp(const struct nf_conntrack_tuple *tuple,
153 struct nf_conntrack_tuple target,
154 struct flow_action *action)
156 __be16 target_src = target.src.u.udp.port;
157 __be16 target_dst = target.dst.u.udp.port;
159 if (target_src != tuple->src.u.udp.port)
160 tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_UDP,
161 offsetof(struct udphdr, source),
162 0xFFFF, be16_to_cpu(target_src));
163 if (target_dst != tuple->dst.u.udp.port)
164 tcf_ct_add_mangle_action(action, FLOW_ACT_MANGLE_HDR_TYPE_UDP,
165 offsetof(struct udphdr, dest),
166 0xFFFF, be16_to_cpu(target_dst));
169 static void tcf_ct_flow_table_add_action_meta(struct nf_conn *ct,
170 enum ip_conntrack_dir dir,
171 struct flow_action *action)
173 struct nf_conn_labels *ct_labels;
174 struct flow_action_entry *entry;
175 enum ip_conntrack_info ctinfo;
178 entry = tcf_ct_flow_table_flow_action_get_next(action);
179 entry->id = FLOW_ACTION_CT_METADATA;
180 #if IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)
181 entry->ct_metadata.mark = ct->mark;
183 ctinfo = dir == IP_CT_DIR_ORIGINAL ? IP_CT_ESTABLISHED :
184 IP_CT_ESTABLISHED_REPLY;
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 const 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_dir dir;
249 case FLOW_OFFLOAD_DIR_ORIGINAL:
250 dir = IP_CT_DIR_ORIGINAL;
252 case FLOW_OFFLOAD_DIR_REPLY:
253 dir = IP_CT_DIR_REPLY;
259 err = tcf_ct_flow_table_add_action_nat(net, ct, dir, action);
263 tcf_ct_flow_table_add_action_meta(ct, dir, action);
267 /* Clear filled actions */
268 for (i = num_entries; i < action->num_entries; i++)
269 memset(&action->entries[i], 0, sizeof(action->entries[i]));
270 action->num_entries = num_entries;
275 static struct nf_flowtable_type flowtable_ct = {
276 .action = tcf_ct_flow_table_fill_actions,
277 .owner = THIS_MODULE,
280 static int tcf_ct_flow_table_get(struct tcf_ct_params *params)
282 struct tcf_ct_flow_table *ct_ft;
285 mutex_lock(&zones_mutex);
286 ct_ft = rhashtable_lookup_fast(&zones_ht, ¶ms->zone, zones_params);
287 if (ct_ft && refcount_inc_not_zero(&ct_ft->ref))
290 ct_ft = kzalloc(sizeof(*ct_ft), GFP_KERNEL);
293 refcount_set(&ct_ft->ref, 1);
295 ct_ft->zone = params->zone;
296 err = rhashtable_insert_fast(&zones_ht, &ct_ft->node, zones_params);
300 ct_ft->nf_ft.type = &flowtable_ct;
301 ct_ft->nf_ft.flags |= NF_FLOWTABLE_HW_OFFLOAD |
302 NF_FLOWTABLE_COUNTER;
303 err = nf_flow_table_init(&ct_ft->nf_ft);
307 __module_get(THIS_MODULE);
309 params->ct_ft = ct_ft;
310 params->nf_ft = &ct_ft->nf_ft;
311 mutex_unlock(&zones_mutex);
316 rhashtable_remove_fast(&zones_ht, &ct_ft->node, zones_params);
320 mutex_unlock(&zones_mutex);
324 static void tcf_ct_flow_table_cleanup_work(struct work_struct *work)
326 struct flow_block_cb *block_cb, *tmp_cb;
327 struct tcf_ct_flow_table *ct_ft;
328 struct flow_block *block;
330 ct_ft = container_of(to_rcu_work(work), struct tcf_ct_flow_table,
332 nf_flow_table_free(&ct_ft->nf_ft);
334 /* Remove any remaining callbacks before cleanup */
335 block = &ct_ft->nf_ft.flow_block;
336 down_write(&ct_ft->nf_ft.flow_block_lock);
337 list_for_each_entry_safe(block_cb, tmp_cb, &block->cb_list, list) {
338 list_del(&block_cb->list);
339 flow_block_cb_free(block_cb);
341 up_write(&ct_ft->nf_ft.flow_block_lock);
344 module_put(THIS_MODULE);
347 static void tcf_ct_flow_table_put(struct tcf_ct_params *params)
349 struct tcf_ct_flow_table *ct_ft = params->ct_ft;
351 if (refcount_dec_and_test(¶ms->ct_ft->ref)) {
352 rhashtable_remove_fast(&zones_ht, &ct_ft->node, zones_params);
353 INIT_RCU_WORK(&ct_ft->rwork, tcf_ct_flow_table_cleanup_work);
354 queue_rcu_work(act_ct_wq, &ct_ft->rwork);
358 static void tcf_ct_flow_tc_ifidx(struct flow_offload *entry,
359 struct nf_conn_act_ct_ext *act_ct_ext, u8 dir)
361 entry->tuplehash[dir].tuple.xmit_type = FLOW_OFFLOAD_XMIT_TC;
362 entry->tuplehash[dir].tuple.tc.iifidx = act_ct_ext->ifindex[dir];
365 static void tcf_ct_flow_table_add(struct tcf_ct_flow_table *ct_ft,
369 struct nf_conn_act_ct_ext *act_ct_ext;
370 struct flow_offload *entry;
373 if (test_and_set_bit(IPS_OFFLOAD_BIT, &ct->status))
376 entry = flow_offload_alloc(ct);
383 ct->proto.tcp.seen[0].flags |= IP_CT_TCP_FLAG_BE_LIBERAL;
384 ct->proto.tcp.seen[1].flags |= IP_CT_TCP_FLAG_BE_LIBERAL;
387 act_ct_ext = nf_conn_act_ct_ext_find(ct);
389 tcf_ct_flow_tc_ifidx(entry, act_ct_ext, FLOW_OFFLOAD_DIR_ORIGINAL);
390 tcf_ct_flow_tc_ifidx(entry, act_ct_ext, FLOW_OFFLOAD_DIR_REPLY);
393 err = flow_offload_add(&ct_ft->nf_ft, entry);
400 flow_offload_free(entry);
402 clear_bit(IPS_OFFLOAD_BIT, &ct->status);
405 static void tcf_ct_flow_table_process_conn(struct tcf_ct_flow_table *ct_ft,
407 enum ip_conntrack_info ctinfo)
411 if ((ctinfo != IP_CT_ESTABLISHED && ctinfo != IP_CT_ESTABLISHED_REPLY) ||
412 !test_bit(IPS_ASSURED_BIT, &ct->status))
415 switch (nf_ct_protonum(ct)) {
418 if (ct->proto.tcp.state != TCP_CONNTRACK_ESTABLISHED)
423 #ifdef CONFIG_NF_CT_PROTO_GRE
425 struct nf_conntrack_tuple *tuple;
427 if (ct->status & IPS_NAT_MASK)
429 tuple = &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple;
430 /* No support for GRE v1 */
431 if (tuple->src.u.gre.key || tuple->dst.u.gre.key)
440 if (nf_ct_ext_exist(ct, NF_CT_EXT_HELPER) ||
441 ct->status & IPS_SEQ_ADJUST)
444 tcf_ct_flow_table_add(ct_ft, ct, tcp);
448 tcf_ct_flow_table_fill_tuple_ipv4(struct sk_buff *skb,
449 struct flow_offload_tuple *tuple,
450 struct tcphdr **tcph)
452 struct flow_ports *ports;
458 if (!pskb_network_may_pull(skb, sizeof(*iph)))
462 thoff = iph->ihl * 4;
464 if (ip_is_fragment(iph) ||
465 unlikely(thoff != sizeof(struct iphdr)))
468 ipproto = iph->protocol;
471 hdrsize = sizeof(struct tcphdr);
474 hdrsize = sizeof(*ports);
476 #ifdef CONFIG_NF_CT_PROTO_GRE
478 hdrsize = sizeof(struct gre_base_hdr);
488 if (!pskb_network_may_pull(skb, thoff + hdrsize))
493 *tcph = (void *)(skb_network_header(skb) + thoff);
496 ports = (struct flow_ports *)(skb_network_header(skb) + thoff);
497 tuple->src_port = ports->source;
498 tuple->dst_port = ports->dest;
501 struct gre_base_hdr *greh;
503 greh = (struct gre_base_hdr *)(skb_network_header(skb) + thoff);
504 if ((greh->flags & GRE_VERSION) != GRE_VERSION_0)
512 tuple->src_v4.s_addr = iph->saddr;
513 tuple->dst_v4.s_addr = iph->daddr;
514 tuple->l3proto = AF_INET;
515 tuple->l4proto = ipproto;
521 tcf_ct_flow_table_fill_tuple_ipv6(struct sk_buff *skb,
522 struct flow_offload_tuple *tuple,
523 struct tcphdr **tcph)
525 struct flow_ports *ports;
526 struct ipv6hdr *ip6h;
531 if (!pskb_network_may_pull(skb, sizeof(*ip6h)))
534 ip6h = ipv6_hdr(skb);
535 thoff = sizeof(*ip6h);
537 nexthdr = ip6h->nexthdr;
540 hdrsize = sizeof(struct tcphdr);
543 hdrsize = sizeof(*ports);
545 #ifdef CONFIG_NF_CT_PROTO_GRE
547 hdrsize = sizeof(struct gre_base_hdr);
554 if (ip6h->hop_limit <= 1)
557 if (!pskb_network_may_pull(skb, thoff + hdrsize))
562 *tcph = (void *)(skb_network_header(skb) + thoff);
565 ports = (struct flow_ports *)(skb_network_header(skb) + thoff);
566 tuple->src_port = ports->source;
567 tuple->dst_port = ports->dest;
570 struct gre_base_hdr *greh;
572 greh = (struct gre_base_hdr *)(skb_network_header(skb) + thoff);
573 if ((greh->flags & GRE_VERSION) != GRE_VERSION_0)
579 ip6h = ipv6_hdr(skb);
581 tuple->src_v6 = ip6h->saddr;
582 tuple->dst_v6 = ip6h->daddr;
583 tuple->l3proto = AF_INET6;
584 tuple->l4proto = nexthdr;
589 static bool tcf_ct_flow_table_lookup(struct tcf_ct_params *p,
593 struct nf_flowtable *nf_ft = &p->ct_ft->nf_ft;
594 struct flow_offload_tuple_rhash *tuplehash;
595 struct flow_offload_tuple tuple = {};
596 enum ip_conntrack_info ctinfo;
597 struct tcphdr *tcph = NULL;
598 struct flow_offload *flow;
604 if (!tcf_ct_flow_table_fill_tuple_ipv4(skb, &tuple, &tcph))
608 if (!tcf_ct_flow_table_fill_tuple_ipv6(skb, &tuple, &tcph))
615 tuplehash = flow_offload_lookup(nf_ft, &tuple);
619 dir = tuplehash->tuple.dir;
620 flow = container_of(tuplehash, struct flow_offload, tuplehash[dir]);
623 if (tcph && (unlikely(tcph->fin || tcph->rst))) {
624 flow_offload_teardown(flow);
628 ctinfo = dir == FLOW_OFFLOAD_DIR_ORIGINAL ? IP_CT_ESTABLISHED :
629 IP_CT_ESTABLISHED_REPLY;
631 flow_offload_refresh(nf_ft, flow);
632 nf_conntrack_get(&ct->ct_general);
633 nf_ct_set(skb, ct, ctinfo);
634 if (nf_ft->flags & NF_FLOWTABLE_COUNTER)
635 nf_ct_acct_update(ct, dir, skb->len);
640 static int tcf_ct_flow_tables_init(void)
642 return rhashtable_init(&zones_ht, &zones_params);
645 static void tcf_ct_flow_tables_uninit(void)
647 rhashtable_destroy(&zones_ht);
650 static struct tc_action_ops act_ct_ops;
651 static unsigned int ct_net_id;
653 struct tc_ct_action_net {
654 struct tc_action_net tn; /* Must be first */
658 /* Determine whether skb->_nfct is equal to the result of conntrack lookup. */
659 static bool tcf_ct_skb_nfct_cached(struct net *net, struct sk_buff *skb,
660 u16 zone_id, bool force)
662 enum ip_conntrack_info ctinfo;
665 ct = nf_ct_get(skb, &ctinfo);
668 if (!net_eq(net, read_pnet(&ct->ct_net)))
670 if (nf_ct_zone(ct)->id != zone_id)
673 /* Force conntrack entry direction. */
674 if (force && CTINFO2DIR(ctinfo) != IP_CT_DIR_ORIGINAL) {
675 if (nf_ct_is_confirmed(ct))
685 nf_ct_set(skb, NULL, IP_CT_UNTRACKED);
690 /* Trim the skb to the length specified by the IP/IPv6 header,
691 * removing any trailing lower-layer padding. This prepares the skb
692 * for higher-layer processing that assumes skb->len excludes padding
693 * (such as nf_ip_checksum). The caller needs to pull the skb to the
694 * network header, and ensure ip_hdr/ipv6_hdr points to valid data.
696 static int tcf_ct_skb_network_trim(struct sk_buff *skb, int family)
703 len = ntohs(ip_hdr(skb)->tot_len);
706 len = sizeof(struct ipv6hdr)
707 + ntohs(ipv6_hdr(skb)->payload_len);
713 err = pskb_trim_rcsum(skb, len);
718 static u8 tcf_ct_skb_nf_family(struct sk_buff *skb)
720 u8 family = NFPROTO_UNSPEC;
722 switch (skb_protocol(skb, true)) {
723 case htons(ETH_P_IP):
724 family = NFPROTO_IPV4;
726 case htons(ETH_P_IPV6):
727 family = NFPROTO_IPV6;
736 static int tcf_ct_ipv4_is_fragment(struct sk_buff *skb, bool *frag)
740 len = skb_network_offset(skb) + sizeof(struct iphdr);
741 if (unlikely(skb->len < len))
743 if (unlikely(!pskb_may_pull(skb, len)))
746 *frag = ip_is_fragment(ip_hdr(skb));
750 static int tcf_ct_ipv6_is_fragment(struct sk_buff *skb, bool *frag)
752 unsigned int flags = 0, len, payload_ofs = 0;
753 unsigned short frag_off;
756 len = skb_network_offset(skb) + sizeof(struct ipv6hdr);
757 if (unlikely(skb->len < len))
759 if (unlikely(!pskb_may_pull(skb, len)))
762 nexthdr = ipv6_find_hdr(skb, &payload_ofs, -1, &frag_off, &flags);
763 if (unlikely(nexthdr < 0))
766 *frag = flags & IP6_FH_F_FRAG;
770 static int tcf_ct_handle_fragments(struct net *net, struct sk_buff *skb,
771 u8 family, u16 zone, bool *defrag)
773 enum ip_conntrack_info ctinfo;
779 /* Previously seen (loopback)? Ignore. */
780 ct = nf_ct_get(skb, &ctinfo);
781 if ((ct && !nf_ct_is_template(ct)) || ctinfo == IP_CT_UNTRACKED)
784 if (family == NFPROTO_IPV4)
785 err = tcf_ct_ipv4_is_fragment(skb, &frag);
787 err = tcf_ct_ipv6_is_fragment(skb, &frag);
792 mru = tc_skb_cb(skb)->mru;
794 if (family == NFPROTO_IPV4) {
795 enum ip_defrag_users user = IP_DEFRAG_CONNTRACK_IN + zone;
797 memset(IPCB(skb), 0, sizeof(struct inet_skb_parm));
799 err = ip_defrag(net, skb, user);
801 if (err && err != -EINPROGRESS)
806 mru = IPCB(skb)->frag_max_size;
808 } else { /* NFPROTO_IPV6 */
809 #if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6)
810 enum ip6_defrag_users user = IP6_DEFRAG_CONNTRACK_IN + zone;
812 memset(IP6CB(skb), 0, sizeof(struct inet6_skb_parm));
813 err = nf_ct_frag6_gather(net, skb, user);
814 if (err && err != -EINPROGRESS)
819 mru = IP6CB(skb)->frag_max_size;
827 if (err != -EINPROGRESS)
828 tc_skb_cb(skb)->mru = mru;
838 static void tcf_ct_params_free(struct rcu_head *head)
840 struct tcf_ct_params *params = container_of(head,
841 struct tcf_ct_params, rcu);
843 tcf_ct_flow_table_put(params);
846 nf_ct_put(params->tmpl);
850 #if IS_ENABLED(CONFIG_NF_NAT)
851 /* Modelled after nf_nat_ipv[46]_fn().
852 * range is only used for new, uninitialized NAT state.
853 * Returns either NF_ACCEPT or NF_DROP.
855 static int ct_nat_execute(struct sk_buff *skb, struct nf_conn *ct,
856 enum ip_conntrack_info ctinfo,
857 const struct nf_nat_range2 *range,
858 enum nf_nat_manip_type maniptype)
860 __be16 proto = skb_protocol(skb, true);
861 int hooknum, err = NF_ACCEPT;
863 /* See HOOK2MANIP(). */
864 if (maniptype == NF_NAT_MANIP_SRC)
865 hooknum = NF_INET_LOCAL_IN; /* Source NAT */
867 hooknum = NF_INET_LOCAL_OUT; /* Destination NAT */
871 case IP_CT_RELATED_REPLY:
872 if (proto == htons(ETH_P_IP) &&
873 ip_hdr(skb)->protocol == IPPROTO_ICMP) {
874 if (!nf_nat_icmp_reply_translation(skb, ct, ctinfo,
878 } else if (IS_ENABLED(CONFIG_IPV6) && proto == htons(ETH_P_IPV6)) {
880 u8 nexthdr = ipv6_hdr(skb)->nexthdr;
881 int hdrlen = ipv6_skip_exthdr(skb,
882 sizeof(struct ipv6hdr),
883 &nexthdr, &frag_off);
885 if (hdrlen >= 0 && nexthdr == IPPROTO_ICMPV6) {
886 if (!nf_nat_icmpv6_reply_translation(skb, ct,
894 /* Non-ICMP, fall thru to initialize if needed. */
897 /* Seen it before? This can happen for loopback, retrans,
900 if (!nf_nat_initialized(ct, maniptype)) {
901 /* Initialize according to the NAT action. */
902 err = (range && range->flags & NF_NAT_RANGE_MAP_IPS)
903 /* Action is set up to establish a new
906 ? nf_nat_setup_info(ct, range, maniptype)
907 : nf_nat_alloc_null_binding(ct, hooknum);
908 if (err != NF_ACCEPT)
913 case IP_CT_ESTABLISHED:
914 case IP_CT_ESTABLISHED_REPLY:
922 err = nf_nat_packet(ct, ctinfo, hooknum, skb);
923 if (err == NF_ACCEPT) {
924 if (maniptype == NF_NAT_MANIP_SRC)
925 tc_skb_cb(skb)->post_ct_snat = 1;
926 if (maniptype == NF_NAT_MANIP_DST)
927 tc_skb_cb(skb)->post_ct_dnat = 1;
932 #endif /* CONFIG_NF_NAT */
934 static void tcf_ct_act_set_mark(struct nf_conn *ct, u32 mark, u32 mask)
936 #if IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)
942 new_mark = mark | (ct->mark & ~(mask));
943 if (ct->mark != new_mark) {
945 if (nf_ct_is_confirmed(ct))
946 nf_conntrack_event_cache(IPCT_MARK, ct);
951 static void tcf_ct_act_set_labels(struct nf_conn *ct,
955 #if IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)
956 size_t labels_sz = sizeof_field(struct tcf_ct_params, labels);
958 if (!memchr_inv(labels_m, 0, labels_sz))
961 nf_connlabels_replace(ct, labels, labels_m, 4);
965 static int tcf_ct_act_nat(struct sk_buff *skb,
967 enum ip_conntrack_info ctinfo,
969 struct nf_nat_range2 *range,
972 #if IS_ENABLED(CONFIG_NF_NAT)
974 enum nf_nat_manip_type maniptype;
976 if (!(ct_action & TCA_CT_ACT_NAT))
979 /* Add NAT extension if not confirmed yet. */
980 if (!nf_ct_is_confirmed(ct) && !nf_ct_nat_ext_add(ct))
981 return NF_DROP; /* Can't NAT. */
983 if (ctinfo != IP_CT_NEW && (ct->status & IPS_NAT_MASK) &&
984 (ctinfo != IP_CT_RELATED || commit)) {
985 /* NAT an established or related connection like before. */
986 if (CTINFO2DIR(ctinfo) == IP_CT_DIR_REPLY)
987 /* This is the REPLY direction for a connection
988 * for which NAT was applied in the forward
989 * direction. Do the reverse NAT.
991 maniptype = ct->status & IPS_SRC_NAT
992 ? NF_NAT_MANIP_DST : NF_NAT_MANIP_SRC;
994 maniptype = ct->status & IPS_SRC_NAT
995 ? NF_NAT_MANIP_SRC : NF_NAT_MANIP_DST;
996 } else if (ct_action & TCA_CT_ACT_NAT_SRC) {
997 maniptype = NF_NAT_MANIP_SRC;
998 } else if (ct_action & TCA_CT_ACT_NAT_DST) {
999 maniptype = NF_NAT_MANIP_DST;
1004 err = ct_nat_execute(skb, ct, ctinfo, range, maniptype);
1005 if (err == NF_ACCEPT && ct->status & IPS_DST_NAT) {
1006 if (ct->status & IPS_SRC_NAT) {
1007 if (maniptype == NF_NAT_MANIP_SRC)
1008 maniptype = NF_NAT_MANIP_DST;
1010 maniptype = NF_NAT_MANIP_SRC;
1012 err = ct_nat_execute(skb, ct, ctinfo, range,
1014 } else if (CTINFO2DIR(ctinfo) == IP_CT_DIR_ORIGINAL) {
1015 err = ct_nat_execute(skb, ct, ctinfo, NULL,
1025 static int tcf_ct_act(struct sk_buff *skb, const struct tc_action *a,
1026 struct tcf_result *res)
1028 struct net *net = dev_net(skb->dev);
1029 bool cached, commit, clear, force;
1030 enum ip_conntrack_info ctinfo;
1031 struct tcf_ct *c = to_ct(a);
1032 struct nf_conn *tmpl = NULL;
1033 struct nf_hook_state state;
1034 int nh_ofs, err, retval;
1035 struct tcf_ct_params *p;
1036 bool skip_add = false;
1037 bool defrag = false;
1041 p = rcu_dereference_bh(c->params);
1043 retval = READ_ONCE(c->tcf_action);
1044 commit = p->ct_action & TCA_CT_ACT_COMMIT;
1045 clear = p->ct_action & TCA_CT_ACT_CLEAR;
1046 force = p->ct_action & TCA_CT_ACT_FORCE;
1049 tcf_lastuse_update(&c->tcf_tm);
1050 tcf_action_update_bstats(&c->common, skb);
1053 tc_skb_cb(skb)->post_ct = false;
1054 ct = nf_ct_get(skb, &ctinfo);
1057 nf_ct_set(skb, NULL, IP_CT_UNTRACKED);
1063 family = tcf_ct_skb_nf_family(skb);
1064 if (family == NFPROTO_UNSPEC)
1067 /* The conntrack module expects to be working at L3.
1068 * We also try to pull the IPv4/6 header to linear area
1070 nh_ofs = skb_network_offset(skb);
1071 skb_pull_rcsum(skb, nh_ofs);
1072 err = tcf_ct_handle_fragments(net, skb, family, p->zone, &defrag);
1073 if (err == -EINPROGRESS) {
1074 retval = TC_ACT_STOLEN;
1080 err = tcf_ct_skb_network_trim(skb, family);
1084 /* If we are recirculating packets to match on ct fields and
1085 * committing with a separate ct action, then we don't need to
1086 * actually run the packet through conntrack twice unless it's for a
1089 cached = tcf_ct_skb_nfct_cached(net, skb, p->zone, force);
1091 if (tcf_ct_flow_table_lookup(p, skb, family)) {
1096 /* Associate skb with specified zone. */
1098 nf_conntrack_put(skb_nfct(skb));
1099 nf_conntrack_get(&tmpl->ct_general);
1100 nf_ct_set(skb, tmpl, IP_CT_NEW);
1103 state.hook = NF_INET_PRE_ROUTING;
1106 err = nf_conntrack_in(skb, &state);
1107 if (err != NF_ACCEPT)
1112 ct = nf_ct_get(skb, &ctinfo);
1115 nf_ct_deliver_cached_events(ct);
1116 nf_conn_act_ct_ext_fill(skb, ct, ctinfo);
1118 err = tcf_ct_act_nat(skb, ct, ctinfo, p->ct_action, &p->range, commit);
1119 if (err != NF_ACCEPT)
1123 tcf_ct_act_set_mark(ct, p->mark, p->mark_mask);
1124 tcf_ct_act_set_labels(ct, p->labels, p->labels_mask);
1126 if (!nf_ct_is_confirmed(ct))
1127 nf_conn_act_ct_ext_add(ct);
1129 /* This will take care of sending queued events
1130 * even if the connection is already confirmed.
1132 if (nf_conntrack_confirm(skb) != NF_ACCEPT)
1137 tcf_ct_flow_table_process_conn(p->ct_ft, ct, ctinfo);
1140 skb_push_rcsum(skb, nh_ofs);
1142 tc_skb_cb(skb)->post_ct = true;
1143 tc_skb_cb(skb)->zone = p->zone;
1146 qdisc_skb_cb(skb)->pkt_len = skb->len;
1150 tcf_action_inc_drop_qstats(&c->common);
1154 static const struct nla_policy ct_policy[TCA_CT_MAX + 1] = {
1155 [TCA_CT_ACTION] = { .type = NLA_U16 },
1156 [TCA_CT_PARMS] = NLA_POLICY_EXACT_LEN(sizeof(struct tc_ct)),
1157 [TCA_CT_ZONE] = { .type = NLA_U16 },
1158 [TCA_CT_MARK] = { .type = NLA_U32 },
1159 [TCA_CT_MARK_MASK] = { .type = NLA_U32 },
1160 [TCA_CT_LABELS] = { .type = NLA_BINARY,
1161 .len = 128 / BITS_PER_BYTE },
1162 [TCA_CT_LABELS_MASK] = { .type = NLA_BINARY,
1163 .len = 128 / BITS_PER_BYTE },
1164 [TCA_CT_NAT_IPV4_MIN] = { .type = NLA_U32 },
1165 [TCA_CT_NAT_IPV4_MAX] = { .type = NLA_U32 },
1166 [TCA_CT_NAT_IPV6_MIN] = NLA_POLICY_EXACT_LEN(sizeof(struct in6_addr)),
1167 [TCA_CT_NAT_IPV6_MAX] = NLA_POLICY_EXACT_LEN(sizeof(struct in6_addr)),
1168 [TCA_CT_NAT_PORT_MIN] = { .type = NLA_U16 },
1169 [TCA_CT_NAT_PORT_MAX] = { .type = NLA_U16 },
1172 static int tcf_ct_fill_params_nat(struct tcf_ct_params *p,
1175 struct netlink_ext_ack *extack)
1177 struct nf_nat_range2 *range;
1179 if (!(p->ct_action & TCA_CT_ACT_NAT))
1182 if (!IS_ENABLED(CONFIG_NF_NAT)) {
1183 NL_SET_ERR_MSG_MOD(extack, "Netfilter nat isn't enabled in kernel");
1187 if (!(p->ct_action & (TCA_CT_ACT_NAT_SRC | TCA_CT_ACT_NAT_DST)))
1190 if ((p->ct_action & TCA_CT_ACT_NAT_SRC) &&
1191 (p->ct_action & TCA_CT_ACT_NAT_DST)) {
1192 NL_SET_ERR_MSG_MOD(extack, "dnat and snat can't be enabled at the same time");
1197 if (tb[TCA_CT_NAT_IPV4_MIN]) {
1198 struct nlattr *max_attr = tb[TCA_CT_NAT_IPV4_MAX];
1200 p->ipv4_range = true;
1201 range->flags |= NF_NAT_RANGE_MAP_IPS;
1202 range->min_addr.ip =
1203 nla_get_in_addr(tb[TCA_CT_NAT_IPV4_MIN]);
1205 range->max_addr.ip = max_attr ?
1206 nla_get_in_addr(max_attr) :
1208 } else if (tb[TCA_CT_NAT_IPV6_MIN]) {
1209 struct nlattr *max_attr = tb[TCA_CT_NAT_IPV6_MAX];
1211 p->ipv4_range = false;
1212 range->flags |= NF_NAT_RANGE_MAP_IPS;
1213 range->min_addr.in6 =
1214 nla_get_in6_addr(tb[TCA_CT_NAT_IPV6_MIN]);
1216 range->max_addr.in6 = max_attr ?
1217 nla_get_in6_addr(max_attr) :
1218 range->min_addr.in6;
1221 if (tb[TCA_CT_NAT_PORT_MIN]) {
1222 range->flags |= NF_NAT_RANGE_PROTO_SPECIFIED;
1223 range->min_proto.all = nla_get_be16(tb[TCA_CT_NAT_PORT_MIN]);
1225 range->max_proto.all = tb[TCA_CT_NAT_PORT_MAX] ?
1226 nla_get_be16(tb[TCA_CT_NAT_PORT_MAX]) :
1227 range->min_proto.all;
1233 static void tcf_ct_set_key_val(struct nlattr **tb,
1234 void *val, int val_type,
1235 void *mask, int mask_type,
1240 nla_memcpy(val, tb[val_type], len);
1245 if (mask_type == TCA_CT_UNSPEC || !tb[mask_type])
1246 memset(mask, 0xff, len);
1248 nla_memcpy(mask, tb[mask_type], len);
1251 static int tcf_ct_fill_params(struct net *net,
1252 struct tcf_ct_params *p,
1255 struct netlink_ext_ack *extack)
1257 struct tc_ct_action_net *tn = net_generic(net, ct_net_id);
1258 struct nf_conntrack_zone zone;
1259 struct nf_conn *tmpl;
1262 p->zone = NF_CT_DEFAULT_ZONE_ID;
1264 tcf_ct_set_key_val(tb,
1265 &p->ct_action, TCA_CT_ACTION,
1266 NULL, TCA_CT_UNSPEC,
1267 sizeof(p->ct_action));
1269 if (p->ct_action & TCA_CT_ACT_CLEAR)
1272 err = tcf_ct_fill_params_nat(p, parm, tb, extack);
1276 if (tb[TCA_CT_MARK]) {
1277 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) {
1278 NL_SET_ERR_MSG_MOD(extack, "Conntrack mark isn't enabled.");
1281 tcf_ct_set_key_val(tb,
1282 &p->mark, TCA_CT_MARK,
1283 &p->mark_mask, TCA_CT_MARK_MASK,
1287 if (tb[TCA_CT_LABELS]) {
1288 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) {
1289 NL_SET_ERR_MSG_MOD(extack, "Conntrack labels isn't enabled.");
1294 NL_SET_ERR_MSG_MOD(extack, "Failed to set connlabel length");
1297 tcf_ct_set_key_val(tb,
1298 p->labels, TCA_CT_LABELS,
1299 p->labels_mask, TCA_CT_LABELS_MASK,
1303 if (tb[TCA_CT_ZONE]) {
1304 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) {
1305 NL_SET_ERR_MSG_MOD(extack, "Conntrack zones isn't enabled.");
1309 tcf_ct_set_key_val(tb,
1310 &p->zone, TCA_CT_ZONE,
1311 NULL, TCA_CT_UNSPEC,
1315 nf_ct_zone_init(&zone, p->zone, NF_CT_DEFAULT_ZONE_DIR, 0);
1316 tmpl = nf_ct_tmpl_alloc(net, &zone, GFP_KERNEL);
1318 NL_SET_ERR_MSG_MOD(extack, "Failed to allocate conntrack template");
1321 __set_bit(IPS_CONFIRMED_BIT, &tmpl->status);
1327 static int tcf_ct_init(struct net *net, struct nlattr *nla,
1328 struct nlattr *est, struct tc_action **a,
1329 struct tcf_proto *tp, u32 flags,
1330 struct netlink_ext_ack *extack)
1332 struct tc_action_net *tn = net_generic(net, ct_net_id);
1333 bool bind = flags & TCA_ACT_FLAGS_BIND;
1334 struct tcf_ct_params *params = NULL;
1335 struct nlattr *tb[TCA_CT_MAX + 1];
1336 struct tcf_chain *goto_ch = NULL;
1343 NL_SET_ERR_MSG_MOD(extack, "Ct requires attributes to be passed");
1347 err = nla_parse_nested(tb, TCA_CT_MAX, nla, ct_policy, extack);
1351 if (!tb[TCA_CT_PARMS]) {
1352 NL_SET_ERR_MSG_MOD(extack, "Missing required ct parameters");
1355 parm = nla_data(tb[TCA_CT_PARMS]);
1356 index = parm->index;
1357 err = tcf_idr_check_alloc(tn, &index, a, bind);
1362 err = tcf_idr_create_from_flags(tn, index, est, a,
1363 &act_ct_ops, bind, flags);
1365 tcf_idr_cleanup(tn, index);
1368 res = ACT_P_CREATED;
1373 if (!(flags & TCA_ACT_FLAGS_REPLACE)) {
1374 tcf_idr_release(*a, bind);
1378 err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
1384 params = kzalloc(sizeof(*params), GFP_KERNEL);
1385 if (unlikely(!params)) {
1390 err = tcf_ct_fill_params(net, params, parm, tb, extack);
1394 err = tcf_ct_flow_table_get(params);
1398 spin_lock_bh(&c->tcf_lock);
1399 goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
1400 params = rcu_replace_pointer(c->params, params,
1401 lockdep_is_held(&c->tcf_lock));
1402 spin_unlock_bh(&c->tcf_lock);
1405 tcf_chain_put_by_act(goto_ch);
1407 call_rcu(¶ms->rcu, tcf_ct_params_free);
1413 tcf_chain_put_by_act(goto_ch);
1415 tcf_idr_release(*a, bind);
1419 static void tcf_ct_cleanup(struct tc_action *a)
1421 struct tcf_ct_params *params;
1422 struct tcf_ct *c = to_ct(a);
1424 params = rcu_dereference_protected(c->params, 1);
1426 call_rcu(¶ms->rcu, tcf_ct_params_free);
1429 static int tcf_ct_dump_key_val(struct sk_buff *skb,
1430 void *val, int val_type,
1431 void *mask, int mask_type,
1436 if (mask && !memchr_inv(mask, 0, len))
1439 err = nla_put(skb, val_type, len, val);
1443 if (mask_type != TCA_CT_UNSPEC) {
1444 err = nla_put(skb, mask_type, len, mask);
1452 static int tcf_ct_dump_nat(struct sk_buff *skb, struct tcf_ct_params *p)
1454 struct nf_nat_range2 *range = &p->range;
1456 if (!(p->ct_action & TCA_CT_ACT_NAT))
1459 if (!(p->ct_action & (TCA_CT_ACT_NAT_SRC | TCA_CT_ACT_NAT_DST)))
1462 if (range->flags & NF_NAT_RANGE_MAP_IPS) {
1463 if (p->ipv4_range) {
1464 if (nla_put_in_addr(skb, TCA_CT_NAT_IPV4_MIN,
1465 range->min_addr.ip))
1467 if (nla_put_in_addr(skb, TCA_CT_NAT_IPV4_MAX,
1468 range->max_addr.ip))
1471 if (nla_put_in6_addr(skb, TCA_CT_NAT_IPV6_MIN,
1472 &range->min_addr.in6))
1474 if (nla_put_in6_addr(skb, TCA_CT_NAT_IPV6_MAX,
1475 &range->max_addr.in6))
1480 if (range->flags & NF_NAT_RANGE_PROTO_SPECIFIED) {
1481 if (nla_put_be16(skb, TCA_CT_NAT_PORT_MIN,
1482 range->min_proto.all))
1484 if (nla_put_be16(skb, TCA_CT_NAT_PORT_MAX,
1485 range->max_proto.all))
1492 static inline int tcf_ct_dump(struct sk_buff *skb, struct tc_action *a,
1495 unsigned char *b = skb_tail_pointer(skb);
1496 struct tcf_ct *c = to_ct(a);
1497 struct tcf_ct_params *p;
1499 struct tc_ct opt = {
1500 .index = c->tcf_index,
1501 .refcnt = refcount_read(&c->tcf_refcnt) - ref,
1502 .bindcnt = atomic_read(&c->tcf_bindcnt) - bind,
1506 spin_lock_bh(&c->tcf_lock);
1507 p = rcu_dereference_protected(c->params,
1508 lockdep_is_held(&c->tcf_lock));
1509 opt.action = c->tcf_action;
1511 if (tcf_ct_dump_key_val(skb,
1512 &p->ct_action, TCA_CT_ACTION,
1513 NULL, TCA_CT_UNSPEC,
1514 sizeof(p->ct_action)))
1515 goto nla_put_failure;
1517 if (p->ct_action & TCA_CT_ACT_CLEAR)
1520 if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) &&
1521 tcf_ct_dump_key_val(skb,
1522 &p->mark, TCA_CT_MARK,
1523 &p->mark_mask, TCA_CT_MARK_MASK,
1525 goto nla_put_failure;
1527 if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) &&
1528 tcf_ct_dump_key_val(skb,
1529 p->labels, TCA_CT_LABELS,
1530 p->labels_mask, TCA_CT_LABELS_MASK,
1532 goto nla_put_failure;
1534 if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) &&
1535 tcf_ct_dump_key_val(skb,
1536 &p->zone, TCA_CT_ZONE,
1537 NULL, TCA_CT_UNSPEC,
1539 goto nla_put_failure;
1541 if (tcf_ct_dump_nat(skb, p))
1542 goto nla_put_failure;
1545 if (nla_put(skb, TCA_CT_PARMS, sizeof(opt), &opt))
1546 goto nla_put_failure;
1548 tcf_tm_dump(&t, &c->tcf_tm);
1549 if (nla_put_64bit(skb, TCA_CT_TM, sizeof(t), &t, TCA_CT_PAD))
1550 goto nla_put_failure;
1551 spin_unlock_bh(&c->tcf_lock);
1555 spin_unlock_bh(&c->tcf_lock);
1560 static int tcf_ct_walker(struct net *net, struct sk_buff *skb,
1561 struct netlink_callback *cb, int type,
1562 const struct tc_action_ops *ops,
1563 struct netlink_ext_ack *extack)
1565 struct tc_action_net *tn = net_generic(net, ct_net_id);
1567 return tcf_generic_walker(tn, skb, cb, type, ops, extack);
1570 static int tcf_ct_search(struct net *net, struct tc_action **a, u32 index)
1572 struct tc_action_net *tn = net_generic(net, ct_net_id);
1574 return tcf_idr_search(tn, a, index);
1577 static void tcf_stats_update(struct tc_action *a, u64 bytes, u64 packets,
1578 u64 drops, u64 lastuse, bool hw)
1580 struct tcf_ct *c = to_ct(a);
1582 tcf_action_update_stats(a, bytes, packets, drops, hw);
1583 c->tcf_tm.lastuse = max_t(u64, c->tcf_tm.lastuse, lastuse);
1586 static int tcf_ct_offload_act_setup(struct tc_action *act, void *entry_data,
1587 u32 *index_inc, bool bind,
1588 struct netlink_ext_ack *extack)
1591 struct flow_action_entry *entry = entry_data;
1593 entry->id = FLOW_ACTION_CT;
1594 entry->ct.action = tcf_ct_action(act);
1595 entry->ct.zone = tcf_ct_zone(act);
1596 entry->ct.flow_table = tcf_ct_ft(act);
1599 struct flow_offload_action *fl_action = entry_data;
1601 fl_action->id = FLOW_ACTION_CT;
1607 static struct tc_action_ops act_ct_ops = {
1610 .owner = THIS_MODULE,
1612 .dump = tcf_ct_dump,
1613 .init = tcf_ct_init,
1614 .cleanup = tcf_ct_cleanup,
1615 .walk = tcf_ct_walker,
1616 .lookup = tcf_ct_search,
1617 .stats_update = tcf_stats_update,
1618 .offload_act_setup = tcf_ct_offload_act_setup,
1619 .size = sizeof(struct tcf_ct),
1622 static __net_init int ct_init_net(struct net *net)
1624 unsigned int n_bits = sizeof_field(struct tcf_ct_params, labels) * 8;
1625 struct tc_ct_action_net *tn = net_generic(net, ct_net_id);
1627 if (nf_connlabels_get(net, n_bits - 1)) {
1629 pr_err("act_ct: Failed to set connlabels length");
1634 return tc_action_net_init(net, &tn->tn, &act_ct_ops);
1637 static void __net_exit ct_exit_net(struct list_head *net_list)
1642 list_for_each_entry(net, net_list, exit_list) {
1643 struct tc_ct_action_net *tn = net_generic(net, ct_net_id);
1646 nf_connlabels_put(net);
1650 tc_action_net_exit(net_list, ct_net_id);
1653 static struct pernet_operations ct_net_ops = {
1654 .init = ct_init_net,
1655 .exit_batch = ct_exit_net,
1657 .size = sizeof(struct tc_ct_action_net),
1660 static int __init ct_init_module(void)
1664 act_ct_wq = alloc_ordered_workqueue("act_ct_workqueue", 0);
1668 err = tcf_ct_flow_tables_init();
1672 err = tcf_register_action(&act_ct_ops, &ct_net_ops);
1676 static_branch_inc(&tcf_frag_xmit_count);
1681 tcf_ct_flow_tables_uninit();
1683 destroy_workqueue(act_ct_wq);
1687 static void __exit ct_cleanup_module(void)
1689 static_branch_dec(&tcf_frag_xmit_count);
1690 tcf_unregister_action(&act_ct_ops, &ct_net_ops);
1691 tcf_ct_flow_tables_uninit();
1692 destroy_workqueue(act_ct_wq);
1695 module_init(ct_init_module);
1696 module_exit(ct_cleanup_module);
1697 MODULE_AUTHOR("Paul Blakey <paulb@mellanox.com>");
1698 MODULE_AUTHOR("Yossi Kuperman <yossiku@mellanox.com>");
1699 MODULE_AUTHOR("Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>");
1700 MODULE_DESCRIPTION("Connection tracking action");
1701 MODULE_LICENSE("GPL v2");