1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/types.h>
3 #include <linux/netfilter.h>
4 #include <linux/slab.h>
5 #include <linux/module.h>
6 #include <linux/skbuff.h>
7 #include <linux/proc_fs.h>
8 #include <linux/seq_file.h>
9 #include <linux/percpu.h>
10 #include <linux/netdevice.h>
11 #include <linux/security.h>
12 #include <net/net_namespace.h>
14 #include <linux/sysctl.h>
17 #include <net/netfilter/nf_conntrack.h>
18 #include <net/netfilter/nf_conntrack_core.h>
19 #include <net/netfilter/nf_conntrack_l4proto.h>
20 #include <net/netfilter/nf_conntrack_expect.h>
21 #include <net/netfilter/nf_conntrack_helper.h>
22 #include <net/netfilter/nf_conntrack_acct.h>
23 #include <net/netfilter/nf_conntrack_zones.h>
24 #include <net/netfilter/nf_conntrack_timestamp.h>
25 #ifdef CONFIG_LWTUNNEL
26 #include <net/netfilter/nf_hooks_lwtunnel.h>
28 #include <linux/rculist_nulls.h>
30 static bool enable_hooks __read_mostly;
31 MODULE_PARM_DESC(enable_hooks, "Always enable conntrack hooks");
32 module_param(enable_hooks, bool, 0000);
34 unsigned int nf_conntrack_net_id __read_mostly;
36 #ifdef CONFIG_NF_CONNTRACK_PROCFS
38 print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
39 const struct nf_conntrack_l4proto *l4proto)
41 switch (tuple->src.l3num) {
43 seq_printf(s, "src=%pI4 dst=%pI4 ",
44 &tuple->src.u3.ip, &tuple->dst.u3.ip);
47 seq_printf(s, "src=%pI6 dst=%pI6 ",
48 tuple->src.u3.ip6, tuple->dst.u3.ip6);
54 switch (l4proto->l4proto) {
56 seq_printf(s, "type=%u code=%u id=%u ",
57 tuple->dst.u.icmp.type,
58 tuple->dst.u.icmp.code,
59 ntohs(tuple->src.u.icmp.id));
62 seq_printf(s, "sport=%hu dport=%hu ",
63 ntohs(tuple->src.u.tcp.port),
64 ntohs(tuple->dst.u.tcp.port));
68 seq_printf(s, "sport=%hu dport=%hu ",
69 ntohs(tuple->src.u.udp.port),
70 ntohs(tuple->dst.u.udp.port));
74 seq_printf(s, "sport=%hu dport=%hu ",
75 ntohs(tuple->src.u.dccp.port),
76 ntohs(tuple->dst.u.dccp.port));
79 seq_printf(s, "sport=%hu dport=%hu ",
80 ntohs(tuple->src.u.sctp.port),
81 ntohs(tuple->dst.u.sctp.port));
84 seq_printf(s, "type=%u code=%u id=%u ",
85 tuple->dst.u.icmp.type,
86 tuple->dst.u.icmp.code,
87 ntohs(tuple->src.u.icmp.id));
90 seq_printf(s, "srckey=0x%x dstkey=0x%x ",
91 ntohs(tuple->src.u.gre.key),
92 ntohs(tuple->dst.u.gre.key));
98 EXPORT_SYMBOL_GPL(print_tuple);
100 struct ct_iter_state {
101 struct seq_net_private p;
102 struct hlist_nulls_head *hash;
103 unsigned int htable_size;
108 static struct hlist_nulls_node *ct_get_first(struct seq_file *seq)
110 struct ct_iter_state *st = seq->private;
111 struct hlist_nulls_node *n;
114 st->bucket < st->htable_size;
117 hlist_nulls_first_rcu(&st->hash[st->bucket]));
124 static struct hlist_nulls_node *ct_get_next(struct seq_file *seq,
125 struct hlist_nulls_node *head)
127 struct ct_iter_state *st = seq->private;
129 head = rcu_dereference(hlist_nulls_next_rcu(head));
130 while (is_a_nulls(head)) {
131 if (likely(get_nulls_value(head) == st->bucket)) {
132 if (++st->bucket >= st->htable_size)
135 head = rcu_dereference(
136 hlist_nulls_first_rcu(&st->hash[st->bucket]));
141 static struct hlist_nulls_node *ct_get_idx(struct seq_file *seq, loff_t pos)
143 struct hlist_nulls_node *head = ct_get_first(seq);
146 while (pos && (head = ct_get_next(seq, head)))
148 return pos ? NULL : head;
151 static void *ct_seq_start(struct seq_file *seq, loff_t *pos)
154 struct ct_iter_state *st = seq->private;
156 st->time_now = ktime_get_real_ns();
159 nf_conntrack_get_ht(&st->hash, &st->htable_size);
160 return ct_get_idx(seq, *pos);
163 static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos)
166 return ct_get_next(s, v);
169 static void ct_seq_stop(struct seq_file *s, void *v)
175 #ifdef CONFIG_NF_CONNTRACK_SECMARK
176 static void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
182 ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
186 seq_printf(s, "secctx=%s ", secctx);
188 security_release_secctx(secctx, len);
191 static inline void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
196 #ifdef CONFIG_NF_CONNTRACK_ZONES
197 static void ct_show_zone(struct seq_file *s, const struct nf_conn *ct,
200 const struct nf_conntrack_zone *zone = nf_ct_zone(ct);
202 if (zone->dir != dir)
205 case NF_CT_DEFAULT_ZONE_DIR:
206 seq_printf(s, "zone=%u ", zone->id);
208 case NF_CT_ZONE_DIR_ORIG:
209 seq_printf(s, "zone-orig=%u ", zone->id);
211 case NF_CT_ZONE_DIR_REPL:
212 seq_printf(s, "zone-reply=%u ", zone->id);
219 static inline void ct_show_zone(struct seq_file *s, const struct nf_conn *ct,
225 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
226 static void ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct)
228 struct ct_iter_state *st = s->private;
229 struct nf_conn_tstamp *tstamp;
232 tstamp = nf_conn_tstamp_find(ct);
234 delta_time = st->time_now - tstamp->start;
236 delta_time = div_s64(delta_time, NSEC_PER_SEC);
240 seq_printf(s, "delta-time=%llu ",
241 (unsigned long long)delta_time);
247 ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct)
252 static const char* l3proto_name(u16 proto)
255 case AF_INET: return "ipv4";
256 case AF_INET6: return "ipv6";
262 static const char* l4proto_name(u16 proto)
265 case IPPROTO_ICMP: return "icmp";
266 case IPPROTO_TCP: return "tcp";
267 case IPPROTO_UDP: return "udp";
268 case IPPROTO_DCCP: return "dccp";
269 case IPPROTO_GRE: return "gre";
270 case IPPROTO_SCTP: return "sctp";
271 case IPPROTO_UDPLITE: return "udplite";
272 case IPPROTO_ICMPV6: return "icmpv6";
279 seq_print_acct(struct seq_file *s, const struct nf_conn *ct, int dir)
281 struct nf_conn_acct *acct;
282 struct nf_conn_counter *counter;
284 acct = nf_conn_acct_find(ct);
288 counter = acct->counter;
289 seq_printf(s, "packets=%llu bytes=%llu ",
290 (unsigned long long)atomic64_read(&counter[dir].packets),
291 (unsigned long long)atomic64_read(&counter[dir].bytes));
296 /* return 0 on success, 1 in case of error */
297 static int ct_seq_show(struct seq_file *s, void *v)
299 struct nf_conntrack_tuple_hash *hash = v;
300 struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
301 const struct nf_conntrack_l4proto *l4proto;
302 struct net *net = seq_file_net(s);
306 if (unlikely(!refcount_inc_not_zero(&ct->ct_general.use)))
309 if (nf_ct_should_gc(ct)) {
314 /* we only want to print DIR_ORIGINAL */
315 if (NF_CT_DIRECTION(hash))
318 if (!net_eq(nf_ct_net(ct), net))
321 l4proto = nf_ct_l4proto_find(nf_ct_protonum(ct));
324 seq_printf(s, "%-8s %u %-8s %u ",
325 l3proto_name(nf_ct_l3num(ct)), nf_ct_l3num(ct),
326 l4proto_name(l4proto->l4proto), nf_ct_protonum(ct));
328 if (!test_bit(IPS_OFFLOAD_BIT, &ct->status))
329 seq_printf(s, "%ld ", nf_ct_expires(ct) / HZ);
331 if (l4proto->print_conntrack)
332 l4proto->print_conntrack(s, ct);
334 print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
337 ct_show_zone(s, ct, NF_CT_ZONE_DIR_ORIG);
339 if (seq_has_overflowed(s))
342 if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL))
345 if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
346 seq_puts(s, "[UNREPLIED] ");
348 print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, l4proto);
350 ct_show_zone(s, ct, NF_CT_ZONE_DIR_REPL);
352 if (seq_print_acct(s, ct, IP_CT_DIR_REPLY))
355 if (test_bit(IPS_HW_OFFLOAD_BIT, &ct->status))
356 seq_puts(s, "[HW_OFFLOAD] ");
357 else if (test_bit(IPS_OFFLOAD_BIT, &ct->status))
358 seq_puts(s, "[OFFLOAD] ");
359 else if (test_bit(IPS_ASSURED_BIT, &ct->status))
360 seq_puts(s, "[ASSURED] ");
362 if (seq_has_overflowed(s))
365 #if defined(CONFIG_NF_CONNTRACK_MARK)
366 seq_printf(s, "mark=%u ", ct->mark);
369 ct_show_secctx(s, ct);
370 ct_show_zone(s, ct, NF_CT_DEFAULT_ZONE_DIR);
371 ct_show_delta_time(s, ct);
373 seq_printf(s, "use=%u\n", refcount_read(&ct->ct_general.use));
375 if (seq_has_overflowed(s))
384 static const struct seq_operations ct_seq_ops = {
385 .start = ct_seq_start,
391 static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
393 struct net *net = seq_file_net(seq);
397 return SEQ_START_TOKEN;
399 for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) {
400 if (!cpu_possible(cpu))
403 return per_cpu_ptr(net->ct.stat, cpu);
409 static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
411 struct net *net = seq_file_net(seq);
414 for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) {
415 if (!cpu_possible(cpu))
418 return per_cpu_ptr(net->ct.stat, cpu);
424 static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
428 static int ct_cpu_seq_show(struct seq_file *seq, void *v)
430 struct net *net = seq_file_net(seq);
431 const struct ip_conntrack_stat *st = v;
432 unsigned int nr_conntracks;
434 if (v == SEQ_START_TOKEN) {
435 seq_puts(seq, "entries clashres found new invalid ignore delete chainlength insert insert_failed drop early_drop icmp_error expect_new expect_create expect_delete search_restart\n");
439 nr_conntracks = nf_conntrack_count(net);
441 seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
442 "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n",
465 static const struct seq_operations ct_cpu_seq_ops = {
466 .start = ct_cpu_seq_start,
467 .next = ct_cpu_seq_next,
468 .stop = ct_cpu_seq_stop,
469 .show = ct_cpu_seq_show,
472 static int nf_conntrack_standalone_init_proc(struct net *net)
474 struct proc_dir_entry *pde;
478 pde = proc_create_net("nf_conntrack", 0440, net->proc_net, &ct_seq_ops,
479 sizeof(struct ct_iter_state));
481 goto out_nf_conntrack;
483 root_uid = make_kuid(net->user_ns, 0);
484 root_gid = make_kgid(net->user_ns, 0);
485 if (uid_valid(root_uid) && gid_valid(root_gid))
486 proc_set_user(pde, root_uid, root_gid);
488 pde = proc_create_net("nf_conntrack", 0444, net->proc_net_stat,
489 &ct_cpu_seq_ops, sizeof(struct seq_net_private));
491 goto out_stat_nf_conntrack;
494 out_stat_nf_conntrack:
495 remove_proc_entry("nf_conntrack", net->proc_net);
500 static void nf_conntrack_standalone_fini_proc(struct net *net)
502 remove_proc_entry("nf_conntrack", net->proc_net_stat);
503 remove_proc_entry("nf_conntrack", net->proc_net);
506 static int nf_conntrack_standalone_init_proc(struct net *net)
511 static void nf_conntrack_standalone_fini_proc(struct net *net)
514 #endif /* CONFIG_NF_CONNTRACK_PROCFS */
516 u32 nf_conntrack_count(const struct net *net)
518 const struct nf_conntrack_net *cnet = nf_ct_pernet(net);
520 return atomic_read(&cnet->count);
522 EXPORT_SYMBOL_GPL(nf_conntrack_count);
527 /* size the user *wants to set */
528 static unsigned int nf_conntrack_htable_size_user __read_mostly;
531 nf_conntrack_hash_sysctl(struct ctl_table *table, int write,
532 void *buffer, size_t *lenp, loff_t *ppos)
536 /* module_param hashsize could have changed value */
537 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
539 ret = proc_dointvec(table, write, buffer, lenp, ppos);
540 if (ret < 0 || !write)
543 /* update ret, we might not be able to satisfy request */
544 ret = nf_conntrack_hash_resize(nf_conntrack_htable_size_user);
546 /* update it to the actual value used by conntrack */
547 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
551 static struct ctl_table_header *nf_ct_netfilter_header;
553 enum nf_ct_sysctl_index {
556 NF_SYSCTL_CT_BUCKETS,
557 NF_SYSCTL_CT_CHECKSUM,
558 NF_SYSCTL_CT_LOG_INVALID,
559 NF_SYSCTL_CT_EXPECT_MAX,
562 #ifdef CONFIG_NF_CONNTRACK_EVENTS
565 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
566 NF_SYSCTL_CT_TIMESTAMP,
568 NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC,
569 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT,
570 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV,
571 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED,
572 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT,
573 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT,
574 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK,
575 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT,
576 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE,
577 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS,
578 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK,
579 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
580 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD,
582 NF_SYSCTL_CT_PROTO_TCP_LOOSE,
583 NF_SYSCTL_CT_PROTO_TCP_LIBERAL,
584 NF_SYSCTL_CT_PROTO_TCP_IGNORE_INVALID_RST,
585 NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS,
586 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP,
587 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM,
588 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
589 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD,
591 NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP,
592 NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6,
593 #ifdef CONFIG_NF_CT_PROTO_SCTP
594 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED,
595 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT,
596 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED,
597 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED,
598 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT,
599 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD,
600 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT,
601 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT,
602 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_ACKED,
604 #ifdef CONFIG_NF_CT_PROTO_DCCP
605 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST,
606 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND,
607 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN,
608 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN,
609 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ,
610 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING,
611 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT,
612 NF_SYSCTL_CT_PROTO_DCCP_LOOSE,
614 #ifdef CONFIG_NF_CT_PROTO_GRE
615 NF_SYSCTL_CT_PROTO_TIMEOUT_GRE,
616 NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM,
618 #ifdef CONFIG_LWTUNNEL
619 NF_SYSCTL_CT_LWTUNNEL,
622 __NF_SYSCTL_CT_LAST_SYSCTL,
625 #define NF_SYSCTL_CT_LAST_SYSCTL (__NF_SYSCTL_CT_LAST_SYSCTL + 1)
627 static struct ctl_table nf_ct_sysctl_table[] = {
628 [NF_SYSCTL_CT_MAX] = {
629 .procname = "nf_conntrack_max",
630 .data = &nf_conntrack_max,
631 .maxlen = sizeof(int),
633 .proc_handler = proc_dointvec,
635 [NF_SYSCTL_CT_COUNT] = {
636 .procname = "nf_conntrack_count",
637 .maxlen = sizeof(int),
639 .proc_handler = proc_dointvec,
641 [NF_SYSCTL_CT_BUCKETS] = {
642 .procname = "nf_conntrack_buckets",
643 .data = &nf_conntrack_htable_size_user,
644 .maxlen = sizeof(unsigned int),
646 .proc_handler = nf_conntrack_hash_sysctl,
648 [NF_SYSCTL_CT_CHECKSUM] = {
649 .procname = "nf_conntrack_checksum",
650 .data = &init_net.ct.sysctl_checksum,
651 .maxlen = sizeof(u8),
653 .proc_handler = proc_dou8vec_minmax,
654 .extra1 = SYSCTL_ZERO,
655 .extra2 = SYSCTL_ONE,
657 [NF_SYSCTL_CT_LOG_INVALID] = {
658 .procname = "nf_conntrack_log_invalid",
659 .data = &init_net.ct.sysctl_log_invalid,
660 .maxlen = sizeof(u8),
662 .proc_handler = proc_dou8vec_minmax,
664 [NF_SYSCTL_CT_EXPECT_MAX] = {
665 .procname = "nf_conntrack_expect_max",
666 .data = &nf_ct_expect_max,
667 .maxlen = sizeof(int),
669 .proc_handler = proc_dointvec,
671 [NF_SYSCTL_CT_ACCT] = {
672 .procname = "nf_conntrack_acct",
673 .data = &init_net.ct.sysctl_acct,
674 .maxlen = sizeof(u8),
676 .proc_handler = proc_dou8vec_minmax,
677 .extra1 = SYSCTL_ZERO,
678 .extra2 = SYSCTL_ONE,
680 [NF_SYSCTL_CT_HELPER] = {
681 .procname = "nf_conntrack_helper",
682 .maxlen = sizeof(u8),
684 .proc_handler = proc_dou8vec_minmax,
685 .extra1 = SYSCTL_ZERO,
686 .extra2 = SYSCTL_ONE,
688 #ifdef CONFIG_NF_CONNTRACK_EVENTS
689 [NF_SYSCTL_CT_EVENTS] = {
690 .procname = "nf_conntrack_events",
691 .data = &init_net.ct.sysctl_events,
692 .maxlen = sizeof(u8),
694 .proc_handler = proc_dou8vec_minmax,
695 .extra1 = SYSCTL_ZERO,
696 .extra2 = SYSCTL_ONE,
699 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
700 [NF_SYSCTL_CT_TIMESTAMP] = {
701 .procname = "nf_conntrack_timestamp",
702 .data = &init_net.ct.sysctl_tstamp,
703 .maxlen = sizeof(u8),
705 .proc_handler = proc_dou8vec_minmax,
706 .extra1 = SYSCTL_ZERO,
707 .extra2 = SYSCTL_ONE,
710 [NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC] = {
711 .procname = "nf_conntrack_generic_timeout",
712 .maxlen = sizeof(unsigned int),
714 .proc_handler = proc_dointvec_jiffies,
716 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT] = {
717 .procname = "nf_conntrack_tcp_timeout_syn_sent",
718 .maxlen = sizeof(unsigned int),
720 .proc_handler = proc_dointvec_jiffies,
722 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV] = {
723 .procname = "nf_conntrack_tcp_timeout_syn_recv",
724 .maxlen = sizeof(unsigned int),
726 .proc_handler = proc_dointvec_jiffies,
728 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED] = {
729 .procname = "nf_conntrack_tcp_timeout_established",
730 .maxlen = sizeof(unsigned int),
732 .proc_handler = proc_dointvec_jiffies,
734 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT] = {
735 .procname = "nf_conntrack_tcp_timeout_fin_wait",
736 .maxlen = sizeof(unsigned int),
738 .proc_handler = proc_dointvec_jiffies,
740 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT] = {
741 .procname = "nf_conntrack_tcp_timeout_close_wait",
742 .maxlen = sizeof(unsigned int),
744 .proc_handler = proc_dointvec_jiffies,
746 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK] = {
747 .procname = "nf_conntrack_tcp_timeout_last_ack",
748 .maxlen = sizeof(unsigned int),
750 .proc_handler = proc_dointvec_jiffies,
752 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT] = {
753 .procname = "nf_conntrack_tcp_timeout_time_wait",
754 .maxlen = sizeof(unsigned int),
756 .proc_handler = proc_dointvec_jiffies,
758 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE] = {
759 .procname = "nf_conntrack_tcp_timeout_close",
760 .maxlen = sizeof(unsigned int),
762 .proc_handler = proc_dointvec_jiffies,
764 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS] = {
765 .procname = "nf_conntrack_tcp_timeout_max_retrans",
766 .maxlen = sizeof(unsigned int),
768 .proc_handler = proc_dointvec_jiffies,
770 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK] = {
771 .procname = "nf_conntrack_tcp_timeout_unacknowledged",
772 .maxlen = sizeof(unsigned int),
774 .proc_handler = proc_dointvec_jiffies,
776 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
777 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD] = {
778 .procname = "nf_flowtable_tcp_timeout",
779 .maxlen = sizeof(unsigned int),
781 .proc_handler = proc_dointvec_jiffies,
784 [NF_SYSCTL_CT_PROTO_TCP_LOOSE] = {
785 .procname = "nf_conntrack_tcp_loose",
786 .maxlen = sizeof(u8),
788 .proc_handler = proc_dou8vec_minmax,
789 .extra1 = SYSCTL_ZERO,
790 .extra2 = SYSCTL_ONE,
792 [NF_SYSCTL_CT_PROTO_TCP_LIBERAL] = {
793 .procname = "nf_conntrack_tcp_be_liberal",
794 .maxlen = sizeof(u8),
796 .proc_handler = proc_dou8vec_minmax,
797 .extra1 = SYSCTL_ZERO,
798 .extra2 = SYSCTL_ONE,
800 [NF_SYSCTL_CT_PROTO_TCP_IGNORE_INVALID_RST] = {
801 .procname = "nf_conntrack_tcp_ignore_invalid_rst",
802 .maxlen = sizeof(u8),
804 .proc_handler = proc_dou8vec_minmax,
805 .extra1 = SYSCTL_ZERO,
806 .extra2 = SYSCTL_ONE,
808 [NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS] = {
809 .procname = "nf_conntrack_tcp_max_retrans",
810 .maxlen = sizeof(u8),
812 .proc_handler = proc_dou8vec_minmax,
814 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP] = {
815 .procname = "nf_conntrack_udp_timeout",
816 .maxlen = sizeof(unsigned int),
818 .proc_handler = proc_dointvec_jiffies,
820 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM] = {
821 .procname = "nf_conntrack_udp_timeout_stream",
822 .maxlen = sizeof(unsigned int),
824 .proc_handler = proc_dointvec_jiffies,
826 #if IS_ENABLED(CONFIG_NFT_FLOW_OFFLOAD)
827 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD] = {
828 .procname = "nf_flowtable_udp_timeout",
829 .maxlen = sizeof(unsigned int),
831 .proc_handler = proc_dointvec_jiffies,
834 [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP] = {
835 .procname = "nf_conntrack_icmp_timeout",
836 .maxlen = sizeof(unsigned int),
838 .proc_handler = proc_dointvec_jiffies,
840 [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6] = {
841 .procname = "nf_conntrack_icmpv6_timeout",
842 .maxlen = sizeof(unsigned int),
844 .proc_handler = proc_dointvec_jiffies,
846 #ifdef CONFIG_NF_CT_PROTO_SCTP
847 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED] = {
848 .procname = "nf_conntrack_sctp_timeout_closed",
849 .maxlen = sizeof(unsigned int),
851 .proc_handler = proc_dointvec_jiffies,
853 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT] = {
854 .procname = "nf_conntrack_sctp_timeout_cookie_wait",
855 .maxlen = sizeof(unsigned int),
857 .proc_handler = proc_dointvec_jiffies,
859 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED] = {
860 .procname = "nf_conntrack_sctp_timeout_cookie_echoed",
861 .maxlen = sizeof(unsigned int),
863 .proc_handler = proc_dointvec_jiffies,
865 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED] = {
866 .procname = "nf_conntrack_sctp_timeout_established",
867 .maxlen = sizeof(unsigned int),
869 .proc_handler = proc_dointvec_jiffies,
871 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT] = {
872 .procname = "nf_conntrack_sctp_timeout_shutdown_sent",
873 .maxlen = sizeof(unsigned int),
875 .proc_handler = proc_dointvec_jiffies,
877 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD] = {
878 .procname = "nf_conntrack_sctp_timeout_shutdown_recd",
879 .maxlen = sizeof(unsigned int),
881 .proc_handler = proc_dointvec_jiffies,
883 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT] = {
884 .procname = "nf_conntrack_sctp_timeout_shutdown_ack_sent",
885 .maxlen = sizeof(unsigned int),
887 .proc_handler = proc_dointvec_jiffies,
889 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT] = {
890 .procname = "nf_conntrack_sctp_timeout_heartbeat_sent",
891 .maxlen = sizeof(unsigned int),
893 .proc_handler = proc_dointvec_jiffies,
895 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_ACKED] = {
896 .procname = "nf_conntrack_sctp_timeout_heartbeat_acked",
897 .maxlen = sizeof(unsigned int),
899 .proc_handler = proc_dointvec_jiffies,
902 #ifdef CONFIG_NF_CT_PROTO_DCCP
903 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST] = {
904 .procname = "nf_conntrack_dccp_timeout_request",
905 .maxlen = sizeof(unsigned int),
907 .proc_handler = proc_dointvec_jiffies,
909 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND] = {
910 .procname = "nf_conntrack_dccp_timeout_respond",
911 .maxlen = sizeof(unsigned int),
913 .proc_handler = proc_dointvec_jiffies,
915 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN] = {
916 .procname = "nf_conntrack_dccp_timeout_partopen",
917 .maxlen = sizeof(unsigned int),
919 .proc_handler = proc_dointvec_jiffies,
921 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN] = {
922 .procname = "nf_conntrack_dccp_timeout_open",
923 .maxlen = sizeof(unsigned int),
925 .proc_handler = proc_dointvec_jiffies,
927 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ] = {
928 .procname = "nf_conntrack_dccp_timeout_closereq",
929 .maxlen = sizeof(unsigned int),
931 .proc_handler = proc_dointvec_jiffies,
933 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING] = {
934 .procname = "nf_conntrack_dccp_timeout_closing",
935 .maxlen = sizeof(unsigned int),
937 .proc_handler = proc_dointvec_jiffies,
939 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT] = {
940 .procname = "nf_conntrack_dccp_timeout_timewait",
941 .maxlen = sizeof(unsigned int),
943 .proc_handler = proc_dointvec_jiffies,
945 [NF_SYSCTL_CT_PROTO_DCCP_LOOSE] = {
946 .procname = "nf_conntrack_dccp_loose",
947 .maxlen = sizeof(u8),
949 .proc_handler = proc_dou8vec_minmax,
950 .extra1 = SYSCTL_ZERO,
951 .extra2 = SYSCTL_ONE,
954 #ifdef CONFIG_NF_CT_PROTO_GRE
955 [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE] = {
956 .procname = "nf_conntrack_gre_timeout",
957 .maxlen = sizeof(unsigned int),
959 .proc_handler = proc_dointvec_jiffies,
961 [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM] = {
962 .procname = "nf_conntrack_gre_timeout_stream",
963 .maxlen = sizeof(unsigned int),
965 .proc_handler = proc_dointvec_jiffies,
968 #ifdef CONFIG_LWTUNNEL
969 [NF_SYSCTL_CT_LWTUNNEL] = {
970 .procname = "nf_hooks_lwtunnel",
972 .maxlen = sizeof(int),
974 .proc_handler = nf_hooks_lwtunnel_sysctl_handler,
980 static struct ctl_table nf_ct_netfilter_table[] = {
982 .procname = "nf_conntrack_max",
983 .data = &nf_conntrack_max,
984 .maxlen = sizeof(int),
986 .proc_handler = proc_dointvec,
991 static void nf_conntrack_standalone_init_tcp_sysctl(struct net *net,
992 struct ctl_table *table)
994 struct nf_tcp_net *tn = nf_tcp_pernet(net);
996 #define XASSIGN(XNAME, tn) \
997 table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ ## XNAME].data = \
998 &(tn)->timeouts[TCP_CONNTRACK_ ## XNAME]
1000 XASSIGN(SYN_SENT, tn);
1001 XASSIGN(SYN_RECV, tn);
1002 XASSIGN(ESTABLISHED, tn);
1003 XASSIGN(FIN_WAIT, tn);
1004 XASSIGN(CLOSE_WAIT, tn);
1005 XASSIGN(LAST_ACK, tn);
1006 XASSIGN(TIME_WAIT, tn);
1008 XASSIGN(RETRANS, tn);
1011 #define XASSIGN(XNAME, rval) \
1012 table[NF_SYSCTL_CT_PROTO_TCP_ ## XNAME].data = (rval)
1014 XASSIGN(LOOSE, &tn->tcp_loose);
1015 XASSIGN(LIBERAL, &tn->tcp_be_liberal);
1016 XASSIGN(MAX_RETRANS, &tn->tcp_max_retrans);
1017 XASSIGN(IGNORE_INVALID_RST, &tn->tcp_ignore_invalid_rst);
1020 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
1021 table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD].data = &tn->offload_timeout;
1026 static void nf_conntrack_standalone_init_sctp_sysctl(struct net *net,
1027 struct ctl_table *table)
1029 #ifdef CONFIG_NF_CT_PROTO_SCTP
1030 struct nf_sctp_net *sn = nf_sctp_pernet(net);
1032 #define XASSIGN(XNAME, sn) \
1033 table[NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ ## XNAME].data = \
1034 &(sn)->timeouts[SCTP_CONNTRACK_ ## XNAME]
1036 XASSIGN(CLOSED, sn);
1037 XASSIGN(COOKIE_WAIT, sn);
1038 XASSIGN(COOKIE_ECHOED, sn);
1039 XASSIGN(ESTABLISHED, sn);
1040 XASSIGN(SHUTDOWN_SENT, sn);
1041 XASSIGN(SHUTDOWN_RECD, sn);
1042 XASSIGN(SHUTDOWN_ACK_SENT, sn);
1043 XASSIGN(HEARTBEAT_SENT, sn);
1044 XASSIGN(HEARTBEAT_ACKED, sn);
1049 static void nf_conntrack_standalone_init_dccp_sysctl(struct net *net,
1050 struct ctl_table *table)
1052 #ifdef CONFIG_NF_CT_PROTO_DCCP
1053 struct nf_dccp_net *dn = nf_dccp_pernet(net);
1055 #define XASSIGN(XNAME, dn) \
1056 table[NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_ ## XNAME].data = \
1057 &(dn)->dccp_timeout[CT_DCCP_ ## XNAME]
1059 XASSIGN(REQUEST, dn);
1060 XASSIGN(RESPOND, dn);
1061 XASSIGN(PARTOPEN, dn);
1063 XASSIGN(CLOSEREQ, dn);
1064 XASSIGN(CLOSING, dn);
1065 XASSIGN(TIMEWAIT, dn);
1068 table[NF_SYSCTL_CT_PROTO_DCCP_LOOSE].data = &dn->dccp_loose;
1072 static void nf_conntrack_standalone_init_gre_sysctl(struct net *net,
1073 struct ctl_table *table)
1075 #ifdef CONFIG_NF_CT_PROTO_GRE
1076 struct nf_gre_net *gn = nf_gre_pernet(net);
1078 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE].data = &gn->timeouts[GRE_CT_UNREPLIED];
1079 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM].data = &gn->timeouts[GRE_CT_REPLIED];
1083 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1085 struct nf_conntrack_net *cnet = nf_ct_pernet(net);
1086 struct nf_udp_net *un = nf_udp_pernet(net);
1087 struct ctl_table *table;
1089 BUILD_BUG_ON(ARRAY_SIZE(nf_ct_sysctl_table) != NF_SYSCTL_CT_LAST_SYSCTL);
1091 table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table),
1096 table[NF_SYSCTL_CT_COUNT].data = &cnet->count;
1097 table[NF_SYSCTL_CT_CHECKSUM].data = &net->ct.sysctl_checksum;
1098 table[NF_SYSCTL_CT_LOG_INVALID].data = &net->ct.sysctl_log_invalid;
1099 table[NF_SYSCTL_CT_ACCT].data = &net->ct.sysctl_acct;
1100 table[NF_SYSCTL_CT_HELPER].data = &cnet->sysctl_auto_assign_helper;
1101 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1102 table[NF_SYSCTL_CT_EVENTS].data = &net->ct.sysctl_events;
1104 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
1105 table[NF_SYSCTL_CT_TIMESTAMP].data = &net->ct.sysctl_tstamp;
1107 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC].data = &nf_generic_pernet(net)->timeout;
1108 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP].data = &nf_icmp_pernet(net)->timeout;
1109 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6].data = &nf_icmpv6_pernet(net)->timeout;
1110 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP].data = &un->timeouts[UDP_CT_UNREPLIED];
1111 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM].data = &un->timeouts[UDP_CT_REPLIED];
1112 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
1113 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD].data = &un->offload_timeout;
1116 nf_conntrack_standalone_init_tcp_sysctl(net, table);
1117 nf_conntrack_standalone_init_sctp_sysctl(net, table);
1118 nf_conntrack_standalone_init_dccp_sysctl(net, table);
1119 nf_conntrack_standalone_init_gre_sysctl(net, table);
1121 /* Don't allow non-init_net ns to alter global sysctls */
1122 if (!net_eq(&init_net, net)) {
1123 table[NF_SYSCTL_CT_MAX].mode = 0444;
1124 table[NF_SYSCTL_CT_EXPECT_MAX].mode = 0444;
1125 table[NF_SYSCTL_CT_BUCKETS].mode = 0444;
1128 cnet->sysctl_header = register_net_sysctl(net, "net/netfilter", table);
1129 if (!cnet->sysctl_header)
1130 goto out_unregister_netfilter;
1134 out_unregister_netfilter:
1139 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1141 struct nf_conntrack_net *cnet = nf_ct_pernet(net);
1142 struct ctl_table *table;
1144 table = cnet->sysctl_header->ctl_table_arg;
1145 unregister_net_sysctl_table(cnet->sysctl_header);
1149 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1154 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1157 #endif /* CONFIG_SYSCTL */
1159 static void nf_conntrack_fini_net(struct net *net)
1162 nf_ct_netns_put(net, NFPROTO_INET);
1164 nf_conntrack_standalone_fini_proc(net);
1165 nf_conntrack_standalone_fini_sysctl(net);
1168 static int nf_conntrack_pernet_init(struct net *net)
1172 net->ct.sysctl_checksum = 1;
1174 ret = nf_conntrack_standalone_init_sysctl(net);
1178 ret = nf_conntrack_standalone_init_proc(net);
1182 ret = nf_conntrack_init_net(net);
1187 ret = nf_ct_netns_get(net, NFPROTO_INET);
1195 nf_conntrack_cleanup_net(net);
1197 nf_conntrack_standalone_fini_proc(net);
1199 nf_conntrack_standalone_fini_sysctl(net);
1203 static void nf_conntrack_pernet_exit(struct list_head *net_exit_list)
1207 list_for_each_entry(net, net_exit_list, exit_list)
1208 nf_conntrack_fini_net(net);
1210 nf_conntrack_cleanup_net_list(net_exit_list);
1213 static struct pernet_operations nf_conntrack_net_ops = {
1214 .init = nf_conntrack_pernet_init,
1215 .exit_batch = nf_conntrack_pernet_exit,
1216 .id = &nf_conntrack_net_id,
1217 .size = sizeof(struct nf_conntrack_net),
1220 static int __init nf_conntrack_standalone_init(void)
1222 int ret = nf_conntrack_init_start();
1226 BUILD_BUG_ON(NFCT_INFOMASK <= IP_CT_NUMBER);
1228 #ifdef CONFIG_SYSCTL
1229 nf_ct_netfilter_header =
1230 register_net_sysctl(&init_net, "net", nf_ct_netfilter_table);
1231 if (!nf_ct_netfilter_header) {
1232 pr_err("nf_conntrack: can't register to sysctl.\n");
1237 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
1240 ret = register_pernet_subsys(&nf_conntrack_net_ops);
1244 nf_conntrack_init_end();
1248 #ifdef CONFIG_SYSCTL
1249 unregister_net_sysctl_table(nf_ct_netfilter_header);
1252 nf_conntrack_cleanup_end();
1257 static void __exit nf_conntrack_standalone_fini(void)
1259 nf_conntrack_cleanup_start();
1260 unregister_pernet_subsys(&nf_conntrack_net_ops);
1261 #ifdef CONFIG_SYSCTL
1262 unregister_net_sysctl_table(nf_ct_netfilter_header);
1264 nf_conntrack_cleanup_end();
1267 module_init(nf_conntrack_standalone_init);
1268 module_exit(nf_conntrack_standalone_fini);