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 <net/netlink.h>
19 #include <net/pkt_sched.h>
20 #include <net/pkt_cls.h>
21 #include <net/act_api.h>
23 #include <net/ipv6_frag.h>
24 #include <uapi/linux/tc_act/tc_ct.h>
25 #include <net/tc_act/tc_ct.h>
27 #include <linux/netfilter/nf_nat.h>
28 #include <net/netfilter/nf_conntrack.h>
29 #include <net/netfilter/nf_conntrack_core.h>
30 #include <net/netfilter/nf_conntrack_zones.h>
31 #include <net/netfilter/nf_conntrack_helper.h>
32 #include <net/netfilter/ipv6/nf_defrag_ipv6.h>
34 static struct tc_action_ops act_ct_ops;
35 static unsigned int ct_net_id;
37 struct tc_ct_action_net {
38 struct tc_action_net tn; /* Must be first */
42 /* Determine whether skb->_nfct is equal to the result of conntrack lookup. */
43 static bool tcf_ct_skb_nfct_cached(struct net *net, struct sk_buff *skb,
44 u16 zone_id, bool force)
46 enum ip_conntrack_info ctinfo;
49 ct = nf_ct_get(skb, &ctinfo);
52 if (!net_eq(net, read_pnet(&ct->ct_net)))
54 if (nf_ct_zone(ct)->id != zone_id)
57 /* Force conntrack entry direction. */
58 if (force && CTINFO2DIR(ctinfo) != IP_CT_DIR_ORIGINAL) {
59 if (nf_ct_is_confirmed(ct))
62 nf_conntrack_put(&ct->ct_general);
63 nf_ct_set(skb, NULL, IP_CT_UNTRACKED);
71 /* Trim the skb to the length specified by the IP/IPv6 header,
72 * removing any trailing lower-layer padding. This prepares the skb
73 * for higher-layer processing that assumes skb->len excludes padding
74 * (such as nf_ip_checksum). The caller needs to pull the skb to the
75 * network header, and ensure ip_hdr/ipv6_hdr points to valid data.
77 static int tcf_ct_skb_network_trim(struct sk_buff *skb, int family)
84 len = ntohs(ip_hdr(skb)->tot_len);
87 len = sizeof(struct ipv6hdr)
88 + ntohs(ipv6_hdr(skb)->payload_len);
94 err = pskb_trim_rcsum(skb, len);
99 static u8 tcf_ct_skb_nf_family(struct sk_buff *skb)
101 u8 family = NFPROTO_UNSPEC;
103 switch (skb->protocol) {
104 case htons(ETH_P_IP):
105 family = NFPROTO_IPV4;
107 case htons(ETH_P_IPV6):
108 family = NFPROTO_IPV6;
117 static int tcf_ct_ipv4_is_fragment(struct sk_buff *skb, bool *frag)
121 len = skb_network_offset(skb) + sizeof(struct iphdr);
122 if (unlikely(skb->len < len))
124 if (unlikely(!pskb_may_pull(skb, len)))
127 *frag = ip_is_fragment(ip_hdr(skb));
131 static int tcf_ct_ipv6_is_fragment(struct sk_buff *skb, bool *frag)
133 unsigned int flags = 0, len, payload_ofs = 0;
134 unsigned short frag_off;
137 len = skb_network_offset(skb) + sizeof(struct ipv6hdr);
138 if (unlikely(skb->len < len))
140 if (unlikely(!pskb_may_pull(skb, len)))
143 nexthdr = ipv6_find_hdr(skb, &payload_ofs, -1, &frag_off, &flags);
144 if (unlikely(nexthdr < 0))
147 *frag = flags & IP6_FH_F_FRAG;
151 static int tcf_ct_handle_fragments(struct net *net, struct sk_buff *skb,
154 enum ip_conntrack_info ctinfo;
159 /* Previously seen (loopback)? Ignore. */
160 ct = nf_ct_get(skb, &ctinfo);
161 if ((ct && !nf_ct_is_template(ct)) || ctinfo == IP_CT_UNTRACKED)
164 if (family == NFPROTO_IPV4)
165 err = tcf_ct_ipv4_is_fragment(skb, &frag);
167 err = tcf_ct_ipv6_is_fragment(skb, &frag);
173 if (family == NFPROTO_IPV4) {
174 enum ip_defrag_users user = IP_DEFRAG_CONNTRACK_IN + zone;
176 memset(IPCB(skb), 0, sizeof(struct inet_skb_parm));
178 err = ip_defrag(net, skb, user);
180 if (err && err != -EINPROGRESS)
182 } else { /* NFPROTO_IPV6 */
183 #if IS_ENABLED(CONFIG_NF_DEFRAG_IPV6)
184 enum ip6_defrag_users user = IP6_DEFRAG_CONNTRACK_IN + zone;
186 memset(IP6CB(skb), 0, sizeof(struct inet6_skb_parm));
187 err = nf_ct_frag6_gather(net, skb, user);
188 if (err && err != -EINPROGRESS)
205 static void tcf_ct_params_free(struct rcu_head *head)
207 struct tcf_ct_params *params = container_of(head,
208 struct tcf_ct_params, rcu);
211 nf_conntrack_put(¶ms->tmpl->ct_general);
215 #if IS_ENABLED(CONFIG_NF_NAT)
216 /* Modelled after nf_nat_ipv[46]_fn().
217 * range is only used for new, uninitialized NAT state.
218 * Returns either NF_ACCEPT or NF_DROP.
220 static int ct_nat_execute(struct sk_buff *skb, struct nf_conn *ct,
221 enum ip_conntrack_info ctinfo,
222 const struct nf_nat_range2 *range,
223 enum nf_nat_manip_type maniptype)
225 int hooknum, err = NF_ACCEPT;
227 /* See HOOK2MANIP(). */
228 if (maniptype == NF_NAT_MANIP_SRC)
229 hooknum = NF_INET_LOCAL_IN; /* Source NAT */
231 hooknum = NF_INET_LOCAL_OUT; /* Destination NAT */
235 case IP_CT_RELATED_REPLY:
236 if (skb->protocol == htons(ETH_P_IP) &&
237 ip_hdr(skb)->protocol == IPPROTO_ICMP) {
238 if (!nf_nat_icmp_reply_translation(skb, ct, ctinfo,
242 } else if (IS_ENABLED(CONFIG_IPV6) &&
243 skb->protocol == htons(ETH_P_IPV6)) {
245 u8 nexthdr = ipv6_hdr(skb)->nexthdr;
246 int hdrlen = ipv6_skip_exthdr(skb,
247 sizeof(struct ipv6hdr),
248 &nexthdr, &frag_off);
250 if (hdrlen >= 0 && nexthdr == IPPROTO_ICMPV6) {
251 if (!nf_nat_icmpv6_reply_translation(skb, ct,
259 /* Non-ICMP, fall thru to initialize if needed. */
262 /* Seen it before? This can happen for loopback, retrans,
265 if (!nf_nat_initialized(ct, maniptype)) {
266 /* Initialize according to the NAT action. */
267 err = (range && range->flags & NF_NAT_RANGE_MAP_IPS)
268 /* Action is set up to establish a new
271 ? nf_nat_setup_info(ct, range, maniptype)
272 : nf_nat_alloc_null_binding(ct, hooknum);
273 if (err != NF_ACCEPT)
278 case IP_CT_ESTABLISHED:
279 case IP_CT_ESTABLISHED_REPLY:
287 err = nf_nat_packet(ct, ctinfo, hooknum, skb);
291 #endif /* CONFIG_NF_NAT */
293 static void tcf_ct_act_set_mark(struct nf_conn *ct, u32 mark, u32 mask)
295 #if IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)
301 new_mark = mark | (ct->mark & ~(mask));
302 if (ct->mark != new_mark) {
304 if (nf_ct_is_confirmed(ct))
305 nf_conntrack_event_cache(IPCT_MARK, ct);
310 static void tcf_ct_act_set_labels(struct nf_conn *ct,
314 #if IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)
315 size_t labels_sz = FIELD_SIZEOF(struct tcf_ct_params, labels);
317 if (!memchr_inv(labels_m, 0, labels_sz))
320 nf_connlabels_replace(ct, labels, labels_m, 4);
324 static int tcf_ct_act_nat(struct sk_buff *skb,
326 enum ip_conntrack_info ctinfo,
328 struct nf_nat_range2 *range,
331 #if IS_ENABLED(CONFIG_NF_NAT)
332 enum nf_nat_manip_type maniptype;
334 if (!(ct_action & TCA_CT_ACT_NAT))
337 /* Add NAT extension if not confirmed yet. */
338 if (!nf_ct_is_confirmed(ct) && !nf_ct_nat_ext_add(ct))
339 return NF_DROP; /* Can't NAT. */
341 if (ctinfo != IP_CT_NEW && (ct->status & IPS_NAT_MASK) &&
342 (ctinfo != IP_CT_RELATED || commit)) {
343 /* NAT an established or related connection like before. */
344 if (CTINFO2DIR(ctinfo) == IP_CT_DIR_REPLY)
345 /* This is the REPLY direction for a connection
346 * for which NAT was applied in the forward
347 * direction. Do the reverse NAT.
349 maniptype = ct->status & IPS_SRC_NAT
350 ? NF_NAT_MANIP_DST : NF_NAT_MANIP_SRC;
352 maniptype = ct->status & IPS_SRC_NAT
353 ? NF_NAT_MANIP_SRC : NF_NAT_MANIP_DST;
354 } else if (ct_action & TCA_CT_ACT_NAT_SRC) {
355 maniptype = NF_NAT_MANIP_SRC;
356 } else if (ct_action & TCA_CT_ACT_NAT_DST) {
357 maniptype = NF_NAT_MANIP_DST;
362 return ct_nat_execute(skb, ct, ctinfo, range, maniptype);
368 static int tcf_ct_act(struct sk_buff *skb, const struct tc_action *a,
369 struct tcf_result *res)
371 struct net *net = dev_net(skb->dev);
372 bool cached, commit, clear, force;
373 enum ip_conntrack_info ctinfo;
374 struct tcf_ct *c = to_ct(a);
375 struct nf_conn *tmpl = NULL;
376 struct nf_hook_state state;
377 int nh_ofs, err, retval;
378 struct tcf_ct_params *p;
382 p = rcu_dereference_bh(c->params);
384 retval = READ_ONCE(c->tcf_action);
385 commit = p->ct_action & TCA_CT_ACT_COMMIT;
386 clear = p->ct_action & TCA_CT_ACT_CLEAR;
387 force = p->ct_action & TCA_CT_ACT_FORCE;
391 ct = nf_ct_get(skb, &ctinfo);
393 nf_conntrack_put(&ct->ct_general);
394 nf_ct_set(skb, NULL, IP_CT_UNTRACKED);
400 family = tcf_ct_skb_nf_family(skb);
401 if (family == NFPROTO_UNSPEC)
404 /* The conntrack module expects to be working at L3.
405 * We also try to pull the IPv4/6 header to linear area
407 nh_ofs = skb_network_offset(skb);
408 skb_pull_rcsum(skb, nh_ofs);
409 err = tcf_ct_handle_fragments(net, skb, family, p->zone);
410 if (err == -EINPROGRESS) {
411 retval = TC_ACT_STOLEN;
417 err = tcf_ct_skb_network_trim(skb, family);
421 /* If we are recirculating packets to match on ct fields and
422 * committing with a separate ct action, then we don't need to
423 * actually run the packet through conntrack twice unless it's for a
426 cached = tcf_ct_skb_nfct_cached(net, skb, p->zone, force);
428 /* Associate skb with specified zone. */
430 ct = nf_ct_get(skb, &ctinfo);
432 nf_conntrack_put(skb_nfct(skb));
433 nf_conntrack_get(&tmpl->ct_general);
434 nf_ct_set(skb, tmpl, IP_CT_NEW);
437 state.hook = NF_INET_PRE_ROUTING;
440 err = nf_conntrack_in(skb, &state);
441 if (err != NF_ACCEPT)
445 ct = nf_ct_get(skb, &ctinfo);
448 nf_ct_deliver_cached_events(ct);
450 err = tcf_ct_act_nat(skb, ct, ctinfo, p->ct_action, &p->range, commit);
451 if (err != NF_ACCEPT)
455 tcf_ct_act_set_mark(ct, p->mark, p->mark_mask);
456 tcf_ct_act_set_labels(ct, p->labels, p->labels_mask);
458 /* This will take care of sending queued events
459 * even if the connection is already confirmed.
461 nf_conntrack_confirm(skb);
465 skb_push_rcsum(skb, nh_ofs);
468 bstats_cpu_update(this_cpu_ptr(a->cpu_bstats), skb);
472 qstats_drop_inc(this_cpu_ptr(a->cpu_qstats));
476 static const struct nla_policy ct_policy[TCA_CT_MAX + 1] = {
477 [TCA_CT_UNSPEC] = { .strict_start_type = TCA_CT_UNSPEC + 1 },
478 [TCA_CT_ACTION] = { .type = NLA_U16 },
479 [TCA_CT_PARMS] = { .type = NLA_EXACT_LEN, .len = sizeof(struct tc_ct) },
480 [TCA_CT_ZONE] = { .type = NLA_U16 },
481 [TCA_CT_MARK] = { .type = NLA_U32 },
482 [TCA_CT_MARK_MASK] = { .type = NLA_U32 },
483 [TCA_CT_LABELS] = { .type = NLA_BINARY,
484 .len = 128 / BITS_PER_BYTE },
485 [TCA_CT_LABELS_MASK] = { .type = NLA_BINARY,
486 .len = 128 / BITS_PER_BYTE },
487 [TCA_CT_NAT_IPV4_MIN] = { .type = NLA_U32 },
488 [TCA_CT_NAT_IPV4_MAX] = { .type = NLA_U32 },
489 [TCA_CT_NAT_IPV6_MIN] = { .type = NLA_EXACT_LEN,
490 .len = sizeof(struct in6_addr) },
491 [TCA_CT_NAT_IPV6_MAX] = { .type = NLA_EXACT_LEN,
492 .len = sizeof(struct in6_addr) },
493 [TCA_CT_NAT_PORT_MIN] = { .type = NLA_U16 },
494 [TCA_CT_NAT_PORT_MAX] = { .type = NLA_U16 },
497 static int tcf_ct_fill_params_nat(struct tcf_ct_params *p,
500 struct netlink_ext_ack *extack)
502 struct nf_nat_range2 *range;
504 if (!(p->ct_action & TCA_CT_ACT_NAT))
507 if (!IS_ENABLED(CONFIG_NF_NAT)) {
508 NL_SET_ERR_MSG_MOD(extack, "Netfilter nat isn't enabled in kernel");
512 if (!(p->ct_action & (TCA_CT_ACT_NAT_SRC | TCA_CT_ACT_NAT_DST)))
515 if ((p->ct_action & TCA_CT_ACT_NAT_SRC) &&
516 (p->ct_action & TCA_CT_ACT_NAT_DST)) {
517 NL_SET_ERR_MSG_MOD(extack, "dnat and snat can't be enabled at the same time");
522 if (tb[TCA_CT_NAT_IPV4_MIN]) {
523 struct nlattr *max_attr = tb[TCA_CT_NAT_IPV4_MAX];
525 p->ipv4_range = true;
526 range->flags |= NF_NAT_RANGE_MAP_IPS;
528 nla_get_in_addr(tb[TCA_CT_NAT_IPV4_MIN]);
530 range->max_addr.ip = max_attr ?
531 nla_get_in_addr(max_attr) :
533 } else if (tb[TCA_CT_NAT_IPV6_MIN]) {
534 struct nlattr *max_attr = tb[TCA_CT_NAT_IPV6_MAX];
536 p->ipv4_range = false;
537 range->flags |= NF_NAT_RANGE_MAP_IPS;
538 range->min_addr.in6 =
539 nla_get_in6_addr(tb[TCA_CT_NAT_IPV6_MIN]);
541 range->max_addr.in6 = max_attr ?
542 nla_get_in6_addr(max_attr) :
546 if (tb[TCA_CT_NAT_PORT_MIN]) {
547 range->flags |= NF_NAT_RANGE_PROTO_SPECIFIED;
548 range->min_proto.all = nla_get_be16(tb[TCA_CT_NAT_PORT_MIN]);
550 range->max_proto.all = tb[TCA_CT_NAT_PORT_MAX] ?
551 nla_get_be16(tb[TCA_CT_NAT_PORT_MAX]) :
552 range->min_proto.all;
558 static void tcf_ct_set_key_val(struct nlattr **tb,
559 void *val, int val_type,
560 void *mask, int mask_type,
565 nla_memcpy(val, tb[val_type], len);
570 if (mask_type == TCA_CT_UNSPEC || !tb[mask_type])
571 memset(mask, 0xff, len);
573 nla_memcpy(mask, tb[mask_type], len);
576 static int tcf_ct_fill_params(struct net *net,
577 struct tcf_ct_params *p,
580 struct netlink_ext_ack *extack)
582 struct tc_ct_action_net *tn = net_generic(net, ct_net_id);
583 struct nf_conntrack_zone zone;
584 struct nf_conn *tmpl;
587 p->zone = NF_CT_DEFAULT_ZONE_ID;
589 tcf_ct_set_key_val(tb,
590 &p->ct_action, TCA_CT_ACTION,
592 sizeof(p->ct_action));
594 if (p->ct_action & TCA_CT_ACT_CLEAR)
597 err = tcf_ct_fill_params_nat(p, parm, tb, extack);
601 if (tb[TCA_CT_MARK]) {
602 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_MARK)) {
603 NL_SET_ERR_MSG_MOD(extack, "Conntrack mark isn't enabled.");
606 tcf_ct_set_key_val(tb,
607 &p->mark, TCA_CT_MARK,
608 &p->mark_mask, TCA_CT_MARK_MASK,
612 if (tb[TCA_CT_LABELS]) {
613 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS)) {
614 NL_SET_ERR_MSG_MOD(extack, "Conntrack labels isn't enabled.");
619 NL_SET_ERR_MSG_MOD(extack, "Failed to set connlabel length");
622 tcf_ct_set_key_val(tb,
623 p->labels, TCA_CT_LABELS,
624 p->labels_mask, TCA_CT_LABELS_MASK,
628 if (tb[TCA_CT_ZONE]) {
629 if (!IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES)) {
630 NL_SET_ERR_MSG_MOD(extack, "Conntrack zones isn't enabled.");
634 tcf_ct_set_key_val(tb,
635 &p->zone, TCA_CT_ZONE,
640 if (p->zone == NF_CT_DEFAULT_ZONE_ID)
643 nf_ct_zone_init(&zone, p->zone, NF_CT_DEFAULT_ZONE_DIR, 0);
644 tmpl = nf_ct_tmpl_alloc(net, &zone, GFP_KERNEL);
646 NL_SET_ERR_MSG_MOD(extack, "Failed to allocate conntrack template");
649 __set_bit(IPS_CONFIRMED_BIT, &tmpl->status);
650 nf_conntrack_get(&tmpl->ct_general);
656 static int tcf_ct_init(struct net *net, struct nlattr *nla,
657 struct nlattr *est, struct tc_action **a,
658 int replace, int bind, bool rtnl_held,
659 struct tcf_proto *tp,
660 struct netlink_ext_ack *extack)
662 struct tc_action_net *tn = net_generic(net, ct_net_id);
663 struct tcf_ct_params *params = NULL;
664 struct nlattr *tb[TCA_CT_MAX + 1];
665 struct tcf_chain *goto_ch = NULL;
672 NL_SET_ERR_MSG_MOD(extack, "Ct requires attributes to be passed");
676 err = nla_parse_nested(tb, TCA_CT_MAX, nla, ct_policy, extack);
680 if (!tb[TCA_CT_PARMS]) {
681 NL_SET_ERR_MSG_MOD(extack, "Missing required ct parameters");
684 parm = nla_data(tb[TCA_CT_PARMS]);
686 err = tcf_idr_check_alloc(tn, &index, a, bind);
691 err = tcf_idr_create(tn, index, est, a,
692 &act_ct_ops, bind, true);
694 tcf_idr_cleanup(tn, index);
703 tcf_idr_release(*a, bind);
707 err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);
713 params = kzalloc(sizeof(*params), GFP_KERNEL);
714 if (unlikely(!params)) {
719 err = tcf_ct_fill_params(net, params, parm, tb, extack);
723 spin_lock_bh(&c->tcf_lock);
724 goto_ch = tcf_action_set_ctrlact(*a, parm->action, goto_ch);
725 rcu_swap_protected(c->params, params, lockdep_is_held(&c->tcf_lock));
726 spin_unlock_bh(&c->tcf_lock);
729 tcf_chain_put_by_act(goto_ch);
731 kfree_rcu(params, rcu);
732 if (res == ACT_P_CREATED)
733 tcf_idr_insert(tn, *a);
739 tcf_chain_put_by_act(goto_ch);
741 tcf_idr_release(*a, bind);
745 static void tcf_ct_cleanup(struct tc_action *a)
747 struct tcf_ct_params *params;
748 struct tcf_ct *c = to_ct(a);
750 params = rcu_dereference_protected(c->params, 1);
752 call_rcu(¶ms->rcu, tcf_ct_params_free);
755 static int tcf_ct_dump_key_val(struct sk_buff *skb,
756 void *val, int val_type,
757 void *mask, int mask_type,
762 if (mask && !memchr_inv(mask, 0, len))
765 err = nla_put(skb, val_type, len, val);
769 if (mask_type != TCA_CT_UNSPEC) {
770 err = nla_put(skb, mask_type, len, mask);
778 static int tcf_ct_dump_nat(struct sk_buff *skb, struct tcf_ct_params *p)
780 struct nf_nat_range2 *range = &p->range;
782 if (!(p->ct_action & TCA_CT_ACT_NAT))
785 if (!(p->ct_action & (TCA_CT_ACT_NAT_SRC | TCA_CT_ACT_NAT_DST)))
788 if (range->flags & NF_NAT_RANGE_MAP_IPS) {
790 if (nla_put_in_addr(skb, TCA_CT_NAT_IPV4_MIN,
793 if (nla_put_in_addr(skb, TCA_CT_NAT_IPV4_MAX,
797 if (nla_put_in6_addr(skb, TCA_CT_NAT_IPV6_MIN,
798 &range->min_addr.in6))
800 if (nla_put_in6_addr(skb, TCA_CT_NAT_IPV6_MAX,
801 &range->max_addr.in6))
806 if (range->flags & NF_NAT_RANGE_PROTO_SPECIFIED) {
807 if (nla_put_be16(skb, TCA_CT_NAT_PORT_MIN,
808 range->min_proto.all))
810 if (nla_put_be16(skb, TCA_CT_NAT_PORT_MAX,
811 range->max_proto.all))
818 static inline int tcf_ct_dump(struct sk_buff *skb, struct tc_action *a,
821 unsigned char *b = skb_tail_pointer(skb);
822 struct tcf_ct *c = to_ct(a);
823 struct tcf_ct_params *p;
826 .index = c->tcf_index,
827 .refcnt = refcount_read(&c->tcf_refcnt) - ref,
828 .bindcnt = atomic_read(&c->tcf_bindcnt) - bind,
832 spin_lock_bh(&c->tcf_lock);
833 p = rcu_dereference_protected(c->params,
834 lockdep_is_held(&c->tcf_lock));
835 opt.action = c->tcf_action;
837 if (tcf_ct_dump_key_val(skb,
838 &p->ct_action, TCA_CT_ACTION,
840 sizeof(p->ct_action)))
841 goto nla_put_failure;
843 if (p->ct_action & TCA_CT_ACT_CLEAR)
846 if (IS_ENABLED(CONFIG_NF_CONNTRACK_MARK) &&
847 tcf_ct_dump_key_val(skb,
848 &p->mark, TCA_CT_MARK,
849 &p->mark_mask, TCA_CT_MARK_MASK,
851 goto nla_put_failure;
853 if (IS_ENABLED(CONFIG_NF_CONNTRACK_LABELS) &&
854 tcf_ct_dump_key_val(skb,
855 p->labels, TCA_CT_LABELS,
856 p->labels_mask, TCA_CT_LABELS_MASK,
858 goto nla_put_failure;
860 if (IS_ENABLED(CONFIG_NF_CONNTRACK_ZONES) &&
861 tcf_ct_dump_key_val(skb,
862 &p->zone, TCA_CT_ZONE,
865 goto nla_put_failure;
867 if (tcf_ct_dump_nat(skb, p))
868 goto nla_put_failure;
871 if (nla_put(skb, TCA_CT_PARMS, sizeof(opt), &opt))
872 goto nla_put_failure;
874 tcf_tm_dump(&t, &c->tcf_tm);
875 if (nla_put_64bit(skb, TCA_CT_TM, sizeof(t), &t, TCA_CT_PAD))
876 goto nla_put_failure;
877 spin_unlock_bh(&c->tcf_lock);
881 spin_unlock_bh(&c->tcf_lock);
886 static int tcf_ct_walker(struct net *net, struct sk_buff *skb,
887 struct netlink_callback *cb, int type,
888 const struct tc_action_ops *ops,
889 struct netlink_ext_ack *extack)
891 struct tc_action_net *tn = net_generic(net, ct_net_id);
893 return tcf_generic_walker(tn, skb, cb, type, ops, extack);
896 static int tcf_ct_search(struct net *net, struct tc_action **a, u32 index)
898 struct tc_action_net *tn = net_generic(net, ct_net_id);
900 return tcf_idr_search(tn, a, index);
903 static void tcf_stats_update(struct tc_action *a, u64 bytes, u32 packets,
904 u64 lastuse, bool hw)
906 struct tcf_ct *c = to_ct(a);
908 _bstats_cpu_update(this_cpu_ptr(a->cpu_bstats), bytes, packets);
911 _bstats_cpu_update(this_cpu_ptr(a->cpu_bstats_hw),
913 c->tcf_tm.lastuse = max_t(u64, c->tcf_tm.lastuse, lastuse);
916 static struct tc_action_ops act_ct_ops = {
919 .owner = THIS_MODULE,
923 .cleanup = tcf_ct_cleanup,
924 .walk = tcf_ct_walker,
925 .lookup = tcf_ct_search,
926 .stats_update = tcf_stats_update,
927 .size = sizeof(struct tcf_ct),
930 static __net_init int ct_init_net(struct net *net)
932 unsigned int n_bits = FIELD_SIZEOF(struct tcf_ct_params, labels) * 8;
933 struct tc_ct_action_net *tn = net_generic(net, ct_net_id);
935 if (nf_connlabels_get(net, n_bits - 1)) {
937 pr_err("act_ct: Failed to set connlabels length");
942 return tc_action_net_init(&tn->tn, &act_ct_ops);
945 static void __net_exit ct_exit_net(struct list_head *net_list)
950 list_for_each_entry(net, net_list, exit_list) {
951 struct tc_ct_action_net *tn = net_generic(net, ct_net_id);
954 nf_connlabels_put(net);
958 tc_action_net_exit(net_list, ct_net_id);
961 static struct pernet_operations ct_net_ops = {
963 .exit_batch = ct_exit_net,
965 .size = sizeof(struct tc_ct_action_net),
968 static int __init ct_init_module(void)
970 return tcf_register_action(&act_ct_ops, &ct_net_ops);
973 static void __exit ct_cleanup_module(void)
975 tcf_unregister_action(&act_ct_ops, &ct_net_ops);
978 module_init(ct_init_module);
979 module_exit(ct_cleanup_module);
980 MODULE_AUTHOR("Paul Blakey <paulb@mellanox.com>");
981 MODULE_AUTHOR("Yossi Kuperman <yossiku@mellanox.com>");
982 MODULE_AUTHOR("Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>");
983 MODULE_DESCRIPTION("Connection tracking action");
984 MODULE_LICENSE("GPL v2");