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 #include <linux/rculist_nulls.h>
27 static bool enable_hooks __read_mostly;
28 MODULE_PARM_DESC(enable_hooks, "Always enable conntrack hooks");
29 module_param(enable_hooks, bool, 0000);
31 unsigned int nf_conntrack_net_id __read_mostly;
33 #ifdef CONFIG_NF_CONNTRACK_PROCFS
35 print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
36 const struct nf_conntrack_l4proto *l4proto)
38 switch (tuple->src.l3num) {
40 seq_printf(s, "src=%pI4 dst=%pI4 ",
41 &tuple->src.u3.ip, &tuple->dst.u3.ip);
44 seq_printf(s, "src=%pI6 dst=%pI6 ",
45 tuple->src.u3.ip6, tuple->dst.u3.ip6);
51 switch (l4proto->l4proto) {
53 seq_printf(s, "type=%u code=%u id=%u ",
54 tuple->dst.u.icmp.type,
55 tuple->dst.u.icmp.code,
56 ntohs(tuple->src.u.icmp.id));
59 seq_printf(s, "sport=%hu dport=%hu ",
60 ntohs(tuple->src.u.tcp.port),
61 ntohs(tuple->dst.u.tcp.port));
65 seq_printf(s, "sport=%hu dport=%hu ",
66 ntohs(tuple->src.u.udp.port),
67 ntohs(tuple->dst.u.udp.port));
71 seq_printf(s, "sport=%hu dport=%hu ",
72 ntohs(tuple->src.u.dccp.port),
73 ntohs(tuple->dst.u.dccp.port));
76 seq_printf(s, "sport=%hu dport=%hu ",
77 ntohs(tuple->src.u.sctp.port),
78 ntohs(tuple->dst.u.sctp.port));
81 seq_printf(s, "type=%u code=%u id=%u ",
82 tuple->dst.u.icmp.type,
83 tuple->dst.u.icmp.code,
84 ntohs(tuple->src.u.icmp.id));
87 seq_printf(s, "srckey=0x%x dstkey=0x%x ",
88 ntohs(tuple->src.u.gre.key),
89 ntohs(tuple->dst.u.gre.key));
95 EXPORT_SYMBOL_GPL(print_tuple);
97 struct ct_iter_state {
98 struct seq_net_private p;
99 struct hlist_nulls_head *hash;
100 unsigned int htable_size;
105 static struct hlist_nulls_node *ct_get_first(struct seq_file *seq)
107 struct ct_iter_state *st = seq->private;
108 struct hlist_nulls_node *n;
111 st->bucket < st->htable_size;
114 hlist_nulls_first_rcu(&st->hash[st->bucket]));
121 static struct hlist_nulls_node *ct_get_next(struct seq_file *seq,
122 struct hlist_nulls_node *head)
124 struct ct_iter_state *st = seq->private;
126 head = rcu_dereference(hlist_nulls_next_rcu(head));
127 while (is_a_nulls(head)) {
128 if (likely(get_nulls_value(head) == st->bucket)) {
129 if (++st->bucket >= st->htable_size)
132 head = rcu_dereference(
133 hlist_nulls_first_rcu(&st->hash[st->bucket]));
138 static struct hlist_nulls_node *ct_get_idx(struct seq_file *seq, loff_t pos)
140 struct hlist_nulls_node *head = ct_get_first(seq);
143 while (pos && (head = ct_get_next(seq, head)))
145 return pos ? NULL : head;
148 static void *ct_seq_start(struct seq_file *seq, loff_t *pos)
151 struct ct_iter_state *st = seq->private;
153 st->time_now = ktime_get_real_ns();
156 nf_conntrack_get_ht(&st->hash, &st->htable_size);
157 return ct_get_idx(seq, *pos);
160 static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos)
163 return ct_get_next(s, v);
166 static void ct_seq_stop(struct seq_file *s, void *v)
172 #ifdef CONFIG_NF_CONNTRACK_SECMARK
173 static void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
179 ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
183 seq_printf(s, "secctx=%s ", secctx);
185 security_release_secctx(secctx, len);
188 static inline void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
193 #ifdef CONFIG_NF_CONNTRACK_ZONES
194 static void ct_show_zone(struct seq_file *s, const struct nf_conn *ct,
197 const struct nf_conntrack_zone *zone = nf_ct_zone(ct);
199 if (zone->dir != dir)
202 case NF_CT_DEFAULT_ZONE_DIR:
203 seq_printf(s, "zone=%u ", zone->id);
205 case NF_CT_ZONE_DIR_ORIG:
206 seq_printf(s, "zone-orig=%u ", zone->id);
208 case NF_CT_ZONE_DIR_REPL:
209 seq_printf(s, "zone-reply=%u ", zone->id);
216 static inline void ct_show_zone(struct seq_file *s, const struct nf_conn *ct,
222 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
223 static void ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct)
225 struct ct_iter_state *st = s->private;
226 struct nf_conn_tstamp *tstamp;
229 tstamp = nf_conn_tstamp_find(ct);
231 delta_time = st->time_now - tstamp->start;
233 delta_time = div_s64(delta_time, NSEC_PER_SEC);
237 seq_printf(s, "delta-time=%llu ",
238 (unsigned long long)delta_time);
244 ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct)
249 static const char* l3proto_name(u16 proto)
252 case AF_INET: return "ipv4";
253 case AF_INET6: return "ipv6";
259 static const char* l4proto_name(u16 proto)
262 case IPPROTO_ICMP: return "icmp";
263 case IPPROTO_TCP: return "tcp";
264 case IPPROTO_UDP: return "udp";
265 case IPPROTO_DCCP: return "dccp";
266 case IPPROTO_GRE: return "gre";
267 case IPPROTO_SCTP: return "sctp";
268 case IPPROTO_UDPLITE: return "udplite";
275 seq_print_acct(struct seq_file *s, const struct nf_conn *ct, int dir)
277 struct nf_conn_acct *acct;
278 struct nf_conn_counter *counter;
280 acct = nf_conn_acct_find(ct);
284 counter = acct->counter;
285 seq_printf(s, "packets=%llu bytes=%llu ",
286 (unsigned long long)atomic64_read(&counter[dir].packets),
287 (unsigned long long)atomic64_read(&counter[dir].bytes));
292 /* return 0 on success, 1 in case of error */
293 static int ct_seq_show(struct seq_file *s, void *v)
295 struct nf_conntrack_tuple_hash *hash = v;
296 struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
297 const struct nf_conntrack_l4proto *l4proto;
298 struct net *net = seq_file_net(s);
302 if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use)))
305 if (nf_ct_should_gc(ct)) {
310 /* we only want to print DIR_ORIGINAL */
311 if (NF_CT_DIRECTION(hash))
314 if (!net_eq(nf_ct_net(ct), net))
317 l4proto = nf_ct_l4proto_find(nf_ct_protonum(ct));
320 seq_printf(s, "%-8s %u %-8s %u ",
321 l3proto_name(nf_ct_l3num(ct)), nf_ct_l3num(ct),
322 l4proto_name(l4proto->l4proto), nf_ct_protonum(ct));
324 if (!test_bit(IPS_OFFLOAD_BIT, &ct->status))
325 seq_printf(s, "%ld ", nf_ct_expires(ct) / HZ);
327 if (l4proto->print_conntrack)
328 l4proto->print_conntrack(s, ct);
330 print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
333 ct_show_zone(s, ct, NF_CT_ZONE_DIR_ORIG);
335 if (seq_has_overflowed(s))
338 if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL))
341 if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
342 seq_puts(s, "[UNREPLIED] ");
344 print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, l4proto);
346 ct_show_zone(s, ct, NF_CT_ZONE_DIR_REPL);
348 if (seq_print_acct(s, ct, IP_CT_DIR_REPLY))
351 if (test_bit(IPS_HW_OFFLOAD_BIT, &ct->status))
352 seq_puts(s, "[HW_OFFLOAD] ");
353 else if (test_bit(IPS_OFFLOAD_BIT, &ct->status))
354 seq_puts(s, "[OFFLOAD] ");
355 else if (test_bit(IPS_ASSURED_BIT, &ct->status))
356 seq_puts(s, "[ASSURED] ");
358 if (seq_has_overflowed(s))
361 #if defined(CONFIG_NF_CONNTRACK_MARK)
362 seq_printf(s, "mark=%u ", ct->mark);
365 ct_show_secctx(s, ct);
366 ct_show_zone(s, ct, NF_CT_DEFAULT_ZONE_DIR);
367 ct_show_delta_time(s, ct);
369 seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use));
371 if (seq_has_overflowed(s))
380 static const struct seq_operations ct_seq_ops = {
381 .start = ct_seq_start,
387 static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
389 struct net *net = seq_file_net(seq);
393 return SEQ_START_TOKEN;
395 for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) {
396 if (!cpu_possible(cpu))
399 return per_cpu_ptr(net->ct.stat, cpu);
405 static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
407 struct net *net = seq_file_net(seq);
410 for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) {
411 if (!cpu_possible(cpu))
414 return per_cpu_ptr(net->ct.stat, cpu);
420 static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
424 static int ct_cpu_seq_show(struct seq_file *seq, void *v)
426 struct net *net = seq_file_net(seq);
427 const struct ip_conntrack_stat *st = v;
428 unsigned int nr_conntracks;
430 if (v == SEQ_START_TOKEN) {
431 seq_puts(seq, "entries clashres found new invalid ignore delete delete_list insert insert_failed drop early_drop icmp_error expect_new expect_create expect_delete search_restart\n");
435 nr_conntracks = nf_conntrack_count(net);
437 seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
438 "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n",
461 static const struct seq_operations ct_cpu_seq_ops = {
462 .start = ct_cpu_seq_start,
463 .next = ct_cpu_seq_next,
464 .stop = ct_cpu_seq_stop,
465 .show = ct_cpu_seq_show,
468 static int nf_conntrack_standalone_init_proc(struct net *net)
470 struct proc_dir_entry *pde;
474 pde = proc_create_net("nf_conntrack", 0440, net->proc_net, &ct_seq_ops,
475 sizeof(struct ct_iter_state));
477 goto out_nf_conntrack;
479 root_uid = make_kuid(net->user_ns, 0);
480 root_gid = make_kgid(net->user_ns, 0);
481 if (uid_valid(root_uid) && gid_valid(root_gid))
482 proc_set_user(pde, root_uid, root_gid);
484 pde = proc_create_net("nf_conntrack", 0444, net->proc_net_stat,
485 &ct_cpu_seq_ops, sizeof(struct seq_net_private));
487 goto out_stat_nf_conntrack;
490 out_stat_nf_conntrack:
491 remove_proc_entry("nf_conntrack", net->proc_net);
496 static void nf_conntrack_standalone_fini_proc(struct net *net)
498 remove_proc_entry("nf_conntrack", net->proc_net_stat);
499 remove_proc_entry("nf_conntrack", net->proc_net);
502 static int nf_conntrack_standalone_init_proc(struct net *net)
507 static void nf_conntrack_standalone_fini_proc(struct net *net)
510 #endif /* CONFIG_NF_CONNTRACK_PROCFS */
512 u32 nf_conntrack_count(const struct net *net)
514 const struct nf_conntrack_net *cnet;
516 cnet = net_generic(net, nf_conntrack_net_id);
518 return atomic_read(&cnet->count);
520 EXPORT_SYMBOL_GPL(nf_conntrack_count);
525 /* size the user *wants to set */
526 static unsigned int nf_conntrack_htable_size_user __read_mostly;
529 nf_conntrack_hash_sysctl(struct ctl_table *table, int write,
530 void *buffer, size_t *lenp, loff_t *ppos)
534 /* module_param hashsize could have changed value */
535 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
537 ret = proc_dointvec(table, write, buffer, lenp, ppos);
538 if (ret < 0 || !write)
541 /* update ret, we might not be able to satisfy request */
542 ret = nf_conntrack_hash_resize(nf_conntrack_htable_size_user);
544 /* update it to the actual value used by conntrack */
545 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
549 static struct ctl_table_header *nf_ct_netfilter_header;
551 enum nf_ct_sysctl_index {
554 NF_SYSCTL_CT_BUCKETS,
555 NF_SYSCTL_CT_CHECKSUM,
556 NF_SYSCTL_CT_LOG_INVALID,
557 NF_SYSCTL_CT_EXPECT_MAX,
560 #ifdef CONFIG_NF_CONNTRACK_EVENTS
563 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
564 NF_SYSCTL_CT_TIMESTAMP,
566 NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC,
567 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT,
568 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV,
569 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED,
570 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT,
571 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT,
572 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK,
573 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT,
574 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE,
575 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS,
576 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK,
577 NF_SYSCTL_CT_PROTO_TCP_LOOSE,
578 NF_SYSCTL_CT_PROTO_TCP_LIBERAL,
579 NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS,
580 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP,
581 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM,
582 NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP,
583 NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6,
584 #ifdef CONFIG_NF_CT_PROTO_SCTP
585 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED,
586 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT,
587 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED,
588 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED,
589 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT,
590 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD,
591 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT,
592 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT,
593 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_ACKED,
595 #ifdef CONFIG_NF_CT_PROTO_DCCP
596 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST,
597 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND,
598 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN,
599 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN,
600 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ,
601 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING,
602 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT,
603 NF_SYSCTL_CT_PROTO_DCCP_LOOSE,
605 #ifdef CONFIG_NF_CT_PROTO_GRE
606 NF_SYSCTL_CT_PROTO_TIMEOUT_GRE,
607 NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM,
610 __NF_SYSCTL_CT_LAST_SYSCTL,
613 #define NF_SYSCTL_CT_LAST_SYSCTL (__NF_SYSCTL_CT_LAST_SYSCTL + 1)
615 static struct ctl_table nf_ct_sysctl_table[] = {
616 [NF_SYSCTL_CT_MAX] = {
617 .procname = "nf_conntrack_max",
618 .data = &nf_conntrack_max,
619 .maxlen = sizeof(int),
621 .proc_handler = proc_dointvec,
623 [NF_SYSCTL_CT_COUNT] = {
624 .procname = "nf_conntrack_count",
625 .maxlen = sizeof(int),
627 .proc_handler = proc_dointvec,
629 [NF_SYSCTL_CT_BUCKETS] = {
630 .procname = "nf_conntrack_buckets",
631 .data = &nf_conntrack_htable_size_user,
632 .maxlen = sizeof(unsigned int),
634 .proc_handler = nf_conntrack_hash_sysctl,
636 [NF_SYSCTL_CT_CHECKSUM] = {
637 .procname = "nf_conntrack_checksum",
638 .data = &init_net.ct.sysctl_checksum,
639 .maxlen = sizeof(u8),
641 .proc_handler = proc_dou8vec_minmax,
642 .extra1 = SYSCTL_ZERO,
643 .extra2 = SYSCTL_ONE,
645 [NF_SYSCTL_CT_LOG_INVALID] = {
646 .procname = "nf_conntrack_log_invalid",
647 .data = &init_net.ct.sysctl_log_invalid,
648 .maxlen = sizeof(u8),
650 .proc_handler = proc_dou8vec_minmax,
652 [NF_SYSCTL_CT_EXPECT_MAX] = {
653 .procname = "nf_conntrack_expect_max",
654 .data = &nf_ct_expect_max,
655 .maxlen = sizeof(int),
657 .proc_handler = proc_dointvec,
659 [NF_SYSCTL_CT_ACCT] = {
660 .procname = "nf_conntrack_acct",
661 .data = &init_net.ct.sysctl_acct,
662 .maxlen = sizeof(u8),
664 .proc_handler = proc_dou8vec_minmax,
665 .extra1 = SYSCTL_ZERO,
666 .extra2 = SYSCTL_ONE,
668 [NF_SYSCTL_CT_HELPER] = {
669 .procname = "nf_conntrack_helper",
670 .maxlen = sizeof(u8),
672 .proc_handler = proc_dou8vec_minmax,
673 .extra1 = SYSCTL_ZERO,
674 .extra2 = SYSCTL_ONE,
676 #ifdef CONFIG_NF_CONNTRACK_EVENTS
677 [NF_SYSCTL_CT_EVENTS] = {
678 .procname = "nf_conntrack_events",
679 .data = &init_net.ct.sysctl_events,
680 .maxlen = sizeof(u8),
682 .proc_handler = proc_dou8vec_minmax,
683 .extra1 = SYSCTL_ZERO,
684 .extra2 = SYSCTL_ONE,
687 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
688 [NF_SYSCTL_CT_TIMESTAMP] = {
689 .procname = "nf_conntrack_timestamp",
690 .data = &init_net.ct.sysctl_tstamp,
691 .maxlen = sizeof(u8),
693 .proc_handler = proc_dou8vec_minmax,
694 .extra1 = SYSCTL_ZERO,
695 .extra2 = SYSCTL_ONE,
698 [NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC] = {
699 .procname = "nf_conntrack_generic_timeout",
700 .maxlen = sizeof(unsigned int),
702 .proc_handler = proc_dointvec_jiffies,
704 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT] = {
705 .procname = "nf_conntrack_tcp_timeout_syn_sent",
706 .maxlen = sizeof(unsigned int),
708 .proc_handler = proc_dointvec_jiffies,
710 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV] = {
711 .procname = "nf_conntrack_tcp_timeout_syn_recv",
712 .maxlen = sizeof(unsigned int),
714 .proc_handler = proc_dointvec_jiffies,
716 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED] = {
717 .procname = "nf_conntrack_tcp_timeout_established",
718 .maxlen = sizeof(unsigned int),
720 .proc_handler = proc_dointvec_jiffies,
722 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT] = {
723 .procname = "nf_conntrack_tcp_timeout_fin_wait",
724 .maxlen = sizeof(unsigned int),
726 .proc_handler = proc_dointvec_jiffies,
728 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT] = {
729 .procname = "nf_conntrack_tcp_timeout_close_wait",
730 .maxlen = sizeof(unsigned int),
732 .proc_handler = proc_dointvec_jiffies,
734 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK] = {
735 .procname = "nf_conntrack_tcp_timeout_last_ack",
736 .maxlen = sizeof(unsigned int),
738 .proc_handler = proc_dointvec_jiffies,
740 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT] = {
741 .procname = "nf_conntrack_tcp_timeout_time_wait",
742 .maxlen = sizeof(unsigned int),
744 .proc_handler = proc_dointvec_jiffies,
746 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE] = {
747 .procname = "nf_conntrack_tcp_timeout_close",
748 .maxlen = sizeof(unsigned int),
750 .proc_handler = proc_dointvec_jiffies,
752 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS] = {
753 .procname = "nf_conntrack_tcp_timeout_max_retrans",
754 .maxlen = sizeof(unsigned int),
756 .proc_handler = proc_dointvec_jiffies,
758 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK] = {
759 .procname = "nf_conntrack_tcp_timeout_unacknowledged",
760 .maxlen = sizeof(unsigned int),
762 .proc_handler = proc_dointvec_jiffies,
764 [NF_SYSCTL_CT_PROTO_TCP_LOOSE] = {
765 .procname = "nf_conntrack_tcp_loose",
766 .maxlen = sizeof(u8),
768 .proc_handler = proc_dou8vec_minmax,
769 .extra1 = SYSCTL_ZERO,
770 .extra2 = SYSCTL_ONE,
772 [NF_SYSCTL_CT_PROTO_TCP_LIBERAL] = {
773 .procname = "nf_conntrack_tcp_be_liberal",
774 .maxlen = sizeof(u8),
776 .proc_handler = proc_dou8vec_minmax,
777 .extra1 = SYSCTL_ZERO,
778 .extra2 = SYSCTL_ONE,
780 [NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS] = {
781 .procname = "nf_conntrack_tcp_max_retrans",
782 .maxlen = sizeof(u8),
784 .proc_handler = proc_dou8vec_minmax,
786 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP] = {
787 .procname = "nf_conntrack_udp_timeout",
788 .maxlen = sizeof(unsigned int),
790 .proc_handler = proc_dointvec_jiffies,
792 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM] = {
793 .procname = "nf_conntrack_udp_timeout_stream",
794 .maxlen = sizeof(unsigned int),
796 .proc_handler = proc_dointvec_jiffies,
798 [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP] = {
799 .procname = "nf_conntrack_icmp_timeout",
800 .maxlen = sizeof(unsigned int),
802 .proc_handler = proc_dointvec_jiffies,
804 [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6] = {
805 .procname = "nf_conntrack_icmpv6_timeout",
806 .maxlen = sizeof(unsigned int),
808 .proc_handler = proc_dointvec_jiffies,
810 #ifdef CONFIG_NF_CT_PROTO_SCTP
811 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED] = {
812 .procname = "nf_conntrack_sctp_timeout_closed",
813 .maxlen = sizeof(unsigned int),
815 .proc_handler = proc_dointvec_jiffies,
817 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT] = {
818 .procname = "nf_conntrack_sctp_timeout_cookie_wait",
819 .maxlen = sizeof(unsigned int),
821 .proc_handler = proc_dointvec_jiffies,
823 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED] = {
824 .procname = "nf_conntrack_sctp_timeout_cookie_echoed",
825 .maxlen = sizeof(unsigned int),
827 .proc_handler = proc_dointvec_jiffies,
829 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED] = {
830 .procname = "nf_conntrack_sctp_timeout_established",
831 .maxlen = sizeof(unsigned int),
833 .proc_handler = proc_dointvec_jiffies,
835 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT] = {
836 .procname = "nf_conntrack_sctp_timeout_shutdown_sent",
837 .maxlen = sizeof(unsigned int),
839 .proc_handler = proc_dointvec_jiffies,
841 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD] = {
842 .procname = "nf_conntrack_sctp_timeout_shutdown_recd",
843 .maxlen = sizeof(unsigned int),
845 .proc_handler = proc_dointvec_jiffies,
847 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT] = {
848 .procname = "nf_conntrack_sctp_timeout_shutdown_ack_sent",
849 .maxlen = sizeof(unsigned int),
851 .proc_handler = proc_dointvec_jiffies,
853 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT] = {
854 .procname = "nf_conntrack_sctp_timeout_heartbeat_sent",
855 .maxlen = sizeof(unsigned int),
857 .proc_handler = proc_dointvec_jiffies,
859 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_ACKED] = {
860 .procname = "nf_conntrack_sctp_timeout_heartbeat_acked",
861 .maxlen = sizeof(unsigned int),
863 .proc_handler = proc_dointvec_jiffies,
866 #ifdef CONFIG_NF_CT_PROTO_DCCP
867 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST] = {
868 .procname = "nf_conntrack_dccp_timeout_request",
869 .maxlen = sizeof(unsigned int),
871 .proc_handler = proc_dointvec_jiffies,
873 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND] = {
874 .procname = "nf_conntrack_dccp_timeout_respond",
875 .maxlen = sizeof(unsigned int),
877 .proc_handler = proc_dointvec_jiffies,
879 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN] = {
880 .procname = "nf_conntrack_dccp_timeout_partopen",
881 .maxlen = sizeof(unsigned int),
883 .proc_handler = proc_dointvec_jiffies,
885 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN] = {
886 .procname = "nf_conntrack_dccp_timeout_open",
887 .maxlen = sizeof(unsigned int),
889 .proc_handler = proc_dointvec_jiffies,
891 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ] = {
892 .procname = "nf_conntrack_dccp_timeout_closereq",
893 .maxlen = sizeof(unsigned int),
895 .proc_handler = proc_dointvec_jiffies,
897 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING] = {
898 .procname = "nf_conntrack_dccp_timeout_closing",
899 .maxlen = sizeof(unsigned int),
901 .proc_handler = proc_dointvec_jiffies,
903 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT] = {
904 .procname = "nf_conntrack_dccp_timeout_timewait",
905 .maxlen = sizeof(unsigned int),
907 .proc_handler = proc_dointvec_jiffies,
909 [NF_SYSCTL_CT_PROTO_DCCP_LOOSE] = {
910 .procname = "nf_conntrack_dccp_loose",
911 .maxlen = sizeof(u8),
913 .proc_handler = proc_dou8vec_minmax,
914 .extra1 = SYSCTL_ZERO,
915 .extra2 = SYSCTL_ONE,
918 #ifdef CONFIG_NF_CT_PROTO_GRE
919 [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE] = {
920 .procname = "nf_conntrack_gre_timeout",
921 .maxlen = sizeof(unsigned int),
923 .proc_handler = proc_dointvec_jiffies,
925 [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM] = {
926 .procname = "nf_conntrack_gre_timeout_stream",
927 .maxlen = sizeof(unsigned int),
929 .proc_handler = proc_dointvec_jiffies,
935 static struct ctl_table nf_ct_netfilter_table[] = {
937 .procname = "nf_conntrack_max",
938 .data = &nf_conntrack_max,
939 .maxlen = sizeof(int),
941 .proc_handler = proc_dointvec,
946 static void nf_conntrack_standalone_init_tcp_sysctl(struct net *net,
947 struct ctl_table *table)
949 struct nf_tcp_net *tn = nf_tcp_pernet(net);
951 #define XASSIGN(XNAME, tn) \
952 table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ ## XNAME].data = \
953 &(tn)->timeouts[TCP_CONNTRACK_ ## XNAME]
955 XASSIGN(SYN_SENT, tn);
956 XASSIGN(SYN_RECV, tn);
957 XASSIGN(ESTABLISHED, tn);
958 XASSIGN(FIN_WAIT, tn);
959 XASSIGN(CLOSE_WAIT, tn);
960 XASSIGN(LAST_ACK, tn);
961 XASSIGN(TIME_WAIT, tn);
963 XASSIGN(RETRANS, tn);
966 #define XASSIGN(XNAME, rval) \
967 table[NF_SYSCTL_CT_PROTO_TCP_ ## XNAME].data = (rval)
969 XASSIGN(LOOSE, &tn->tcp_loose);
970 XASSIGN(LIBERAL, &tn->tcp_be_liberal);
971 XASSIGN(MAX_RETRANS, &tn->tcp_max_retrans);
975 static void nf_conntrack_standalone_init_sctp_sysctl(struct net *net,
976 struct ctl_table *table)
978 #ifdef CONFIG_NF_CT_PROTO_SCTP
979 struct nf_sctp_net *sn = nf_sctp_pernet(net);
981 #define XASSIGN(XNAME, sn) \
982 table[NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ ## XNAME].data = \
983 &(sn)->timeouts[SCTP_CONNTRACK_ ## XNAME]
986 XASSIGN(COOKIE_WAIT, sn);
987 XASSIGN(COOKIE_ECHOED, sn);
988 XASSIGN(ESTABLISHED, sn);
989 XASSIGN(SHUTDOWN_SENT, sn);
990 XASSIGN(SHUTDOWN_RECD, sn);
991 XASSIGN(SHUTDOWN_ACK_SENT, sn);
992 XASSIGN(HEARTBEAT_SENT, sn);
993 XASSIGN(HEARTBEAT_ACKED, sn);
998 static void nf_conntrack_standalone_init_dccp_sysctl(struct net *net,
999 struct ctl_table *table)
1001 #ifdef CONFIG_NF_CT_PROTO_DCCP
1002 struct nf_dccp_net *dn = nf_dccp_pernet(net);
1004 #define XASSIGN(XNAME, dn) \
1005 table[NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_ ## XNAME].data = \
1006 &(dn)->dccp_timeout[CT_DCCP_ ## XNAME]
1008 XASSIGN(REQUEST, dn);
1009 XASSIGN(RESPOND, dn);
1010 XASSIGN(PARTOPEN, dn);
1012 XASSIGN(CLOSEREQ, dn);
1013 XASSIGN(CLOSING, dn);
1014 XASSIGN(TIMEWAIT, dn);
1017 table[NF_SYSCTL_CT_PROTO_DCCP_LOOSE].data = &dn->dccp_loose;
1021 static void nf_conntrack_standalone_init_gre_sysctl(struct net *net,
1022 struct ctl_table *table)
1024 #ifdef CONFIG_NF_CT_PROTO_GRE
1025 struct nf_gre_net *gn = nf_gre_pernet(net);
1027 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE].data = &gn->timeouts[GRE_CT_UNREPLIED];
1028 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM].data = &gn->timeouts[GRE_CT_REPLIED];
1032 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1034 struct nf_conntrack_net *cnet = net_generic(net, nf_conntrack_net_id);
1035 struct nf_udp_net *un = nf_udp_pernet(net);
1036 struct ctl_table *table;
1038 BUILD_BUG_ON(ARRAY_SIZE(nf_ct_sysctl_table) != NF_SYSCTL_CT_LAST_SYSCTL);
1040 table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table),
1045 table[NF_SYSCTL_CT_COUNT].data = &cnet->count;
1046 table[NF_SYSCTL_CT_CHECKSUM].data = &net->ct.sysctl_checksum;
1047 table[NF_SYSCTL_CT_LOG_INVALID].data = &net->ct.sysctl_log_invalid;
1048 table[NF_SYSCTL_CT_ACCT].data = &net->ct.sysctl_acct;
1049 table[NF_SYSCTL_CT_HELPER].data = &cnet->sysctl_auto_assign_helper;
1050 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1051 table[NF_SYSCTL_CT_EVENTS].data = &net->ct.sysctl_events;
1053 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
1054 table[NF_SYSCTL_CT_TIMESTAMP].data = &net->ct.sysctl_tstamp;
1056 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC].data = &nf_generic_pernet(net)->timeout;
1057 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP].data = &nf_icmp_pernet(net)->timeout;
1058 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6].data = &nf_icmpv6_pernet(net)->timeout;
1059 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP].data = &un->timeouts[UDP_CT_UNREPLIED];
1060 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM].data = &un->timeouts[UDP_CT_REPLIED];
1062 nf_conntrack_standalone_init_tcp_sysctl(net, table);
1063 nf_conntrack_standalone_init_sctp_sysctl(net, table);
1064 nf_conntrack_standalone_init_dccp_sysctl(net, table);
1065 nf_conntrack_standalone_init_gre_sysctl(net, table);
1067 /* Don't allow non-init_net ns to alter global sysctls */
1068 if (!net_eq(&init_net, net)) {
1069 table[NF_SYSCTL_CT_MAX].mode = 0444;
1070 table[NF_SYSCTL_CT_EXPECT_MAX].mode = 0444;
1071 table[NF_SYSCTL_CT_BUCKETS].mode = 0444;
1074 cnet->sysctl_header = register_net_sysctl(net, "net/netfilter", table);
1075 if (!cnet->sysctl_header)
1076 goto out_unregister_netfilter;
1080 out_unregister_netfilter:
1085 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1087 struct nf_conntrack_net *cnet = net_generic(net, nf_conntrack_net_id);
1088 struct ctl_table *table;
1090 table = cnet->sysctl_header->ctl_table_arg;
1091 unregister_net_sysctl_table(cnet->sysctl_header);
1095 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1100 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1103 #endif /* CONFIG_SYSCTL */
1105 static void nf_conntrack_fini_net(struct net *net)
1108 nf_ct_netns_put(net, NFPROTO_INET);
1110 nf_conntrack_standalone_fini_proc(net);
1111 nf_conntrack_standalone_fini_sysctl(net);
1114 static int nf_conntrack_pernet_init(struct net *net)
1118 net->ct.sysctl_checksum = 1;
1120 ret = nf_conntrack_standalone_init_sysctl(net);
1124 ret = nf_conntrack_standalone_init_proc(net);
1128 ret = nf_conntrack_init_net(net);
1133 ret = nf_ct_netns_get(net, NFPROTO_INET);
1141 nf_conntrack_cleanup_net(net);
1143 nf_conntrack_standalone_fini_proc(net);
1145 nf_conntrack_standalone_fini_sysctl(net);
1149 static void nf_conntrack_pernet_exit(struct list_head *net_exit_list)
1153 list_for_each_entry(net, net_exit_list, exit_list)
1154 nf_conntrack_fini_net(net);
1156 nf_conntrack_cleanup_net_list(net_exit_list);
1159 static struct pernet_operations nf_conntrack_net_ops = {
1160 .init = nf_conntrack_pernet_init,
1161 .exit_batch = nf_conntrack_pernet_exit,
1162 .id = &nf_conntrack_net_id,
1163 .size = sizeof(struct nf_conntrack_net),
1166 static int __init nf_conntrack_standalone_init(void)
1168 int ret = nf_conntrack_init_start();
1172 BUILD_BUG_ON(NFCT_INFOMASK <= IP_CT_NUMBER);
1174 #ifdef CONFIG_SYSCTL
1175 nf_ct_netfilter_header =
1176 register_net_sysctl(&init_net, "net", nf_ct_netfilter_table);
1177 if (!nf_ct_netfilter_header) {
1178 pr_err("nf_conntrack: can't register to sysctl.\n");
1183 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
1186 ret = register_pernet_subsys(&nf_conntrack_net_ops);
1190 nf_conntrack_init_end();
1194 #ifdef CONFIG_SYSCTL
1195 unregister_net_sysctl_table(nf_ct_netfilter_header);
1198 nf_conntrack_cleanup_end();
1203 static void __exit nf_conntrack_standalone_fini(void)
1205 nf_conntrack_cleanup_start();
1206 unregister_pernet_subsys(&nf_conntrack_net_ops);
1207 #ifdef CONFIG_SYSCTL
1208 unregister_net_sysctl_table(nf_ct_netfilter_header);
1210 nf_conntrack_cleanup_end();
1213 module_init(nf_conntrack_standalone_init);
1214 module_exit(nf_conntrack_standalone_fini);