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";
269 case IPPROTO_ICMPV6: return "icmpv6";
276 seq_print_acct(struct seq_file *s, const struct nf_conn *ct, int dir)
278 struct nf_conn_acct *acct;
279 struct nf_conn_counter *counter;
281 acct = nf_conn_acct_find(ct);
285 counter = acct->counter;
286 seq_printf(s, "packets=%llu bytes=%llu ",
287 (unsigned long long)atomic64_read(&counter[dir].packets),
288 (unsigned long long)atomic64_read(&counter[dir].bytes));
293 /* return 0 on success, 1 in case of error */
294 static int ct_seq_show(struct seq_file *s, void *v)
296 struct nf_conntrack_tuple_hash *hash = v;
297 struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
298 const struct nf_conntrack_l4proto *l4proto;
299 struct net *net = seq_file_net(s);
303 if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use)))
306 if (nf_ct_should_gc(ct)) {
311 /* we only want to print DIR_ORIGINAL */
312 if (NF_CT_DIRECTION(hash))
315 if (!net_eq(nf_ct_net(ct), net))
318 l4proto = nf_ct_l4proto_find(nf_ct_protonum(ct));
321 seq_printf(s, "%-8s %u %-8s %u ",
322 l3proto_name(nf_ct_l3num(ct)), nf_ct_l3num(ct),
323 l4proto_name(l4proto->l4proto), nf_ct_protonum(ct));
325 if (!test_bit(IPS_OFFLOAD_BIT, &ct->status))
326 seq_printf(s, "%ld ", nf_ct_expires(ct) / HZ);
328 if (l4proto->print_conntrack)
329 l4proto->print_conntrack(s, ct);
331 print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
334 ct_show_zone(s, ct, NF_CT_ZONE_DIR_ORIG);
336 if (seq_has_overflowed(s))
339 if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL))
342 if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
343 seq_puts(s, "[UNREPLIED] ");
345 print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, l4proto);
347 ct_show_zone(s, ct, NF_CT_ZONE_DIR_REPL);
349 if (seq_print_acct(s, ct, IP_CT_DIR_REPLY))
352 if (test_bit(IPS_HW_OFFLOAD_BIT, &ct->status))
353 seq_puts(s, "[HW_OFFLOAD] ");
354 else if (test_bit(IPS_OFFLOAD_BIT, &ct->status))
355 seq_puts(s, "[OFFLOAD] ");
356 else if (test_bit(IPS_ASSURED_BIT, &ct->status))
357 seq_puts(s, "[ASSURED] ");
359 if (seq_has_overflowed(s))
362 #if defined(CONFIG_NF_CONNTRACK_MARK)
363 seq_printf(s, "mark=%u ", ct->mark);
366 ct_show_secctx(s, ct);
367 ct_show_zone(s, ct, NF_CT_DEFAULT_ZONE_DIR);
368 ct_show_delta_time(s, ct);
370 seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use));
372 if (seq_has_overflowed(s))
381 static const struct seq_operations ct_seq_ops = {
382 .start = ct_seq_start,
388 static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
390 struct net *net = seq_file_net(seq);
394 return SEQ_START_TOKEN;
396 for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) {
397 if (!cpu_possible(cpu))
400 return per_cpu_ptr(net->ct.stat, cpu);
406 static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
408 struct net *net = seq_file_net(seq);
411 for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) {
412 if (!cpu_possible(cpu))
415 return per_cpu_ptr(net->ct.stat, cpu);
421 static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
425 static int ct_cpu_seq_show(struct seq_file *seq, void *v)
427 struct net *net = seq_file_net(seq);
428 const struct ip_conntrack_stat *st = v;
429 unsigned int nr_conntracks;
431 if (v == SEQ_START_TOKEN) {
432 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");
436 nr_conntracks = nf_conntrack_count(net);
438 seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
439 "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n",
462 static const struct seq_operations ct_cpu_seq_ops = {
463 .start = ct_cpu_seq_start,
464 .next = ct_cpu_seq_next,
465 .stop = ct_cpu_seq_stop,
466 .show = ct_cpu_seq_show,
469 static int nf_conntrack_standalone_init_proc(struct net *net)
471 struct proc_dir_entry *pde;
475 pde = proc_create_net("nf_conntrack", 0440, net->proc_net, &ct_seq_ops,
476 sizeof(struct ct_iter_state));
478 goto out_nf_conntrack;
480 root_uid = make_kuid(net->user_ns, 0);
481 root_gid = make_kgid(net->user_ns, 0);
482 if (uid_valid(root_uid) && gid_valid(root_gid))
483 proc_set_user(pde, root_uid, root_gid);
485 pde = proc_create_net("nf_conntrack", 0444, net->proc_net_stat,
486 &ct_cpu_seq_ops, sizeof(struct seq_net_private));
488 goto out_stat_nf_conntrack;
491 out_stat_nf_conntrack:
492 remove_proc_entry("nf_conntrack", net->proc_net);
497 static void nf_conntrack_standalone_fini_proc(struct net *net)
499 remove_proc_entry("nf_conntrack", net->proc_net_stat);
500 remove_proc_entry("nf_conntrack", net->proc_net);
503 static int nf_conntrack_standalone_init_proc(struct net *net)
508 static void nf_conntrack_standalone_fini_proc(struct net *net)
511 #endif /* CONFIG_NF_CONNTRACK_PROCFS */
513 u32 nf_conntrack_count(const struct net *net)
515 const struct nf_conntrack_net *cnet;
517 cnet = net_generic(net, nf_conntrack_net_id);
519 return atomic_read(&cnet->count);
521 EXPORT_SYMBOL_GPL(nf_conntrack_count);
526 /* size the user *wants to set */
527 static unsigned int nf_conntrack_htable_size_user __read_mostly;
530 nf_conntrack_hash_sysctl(struct ctl_table *table, int write,
531 void *buffer, size_t *lenp, loff_t *ppos)
535 /* module_param hashsize could have changed value */
536 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
538 ret = proc_dointvec(table, write, buffer, lenp, ppos);
539 if (ret < 0 || !write)
542 /* update ret, we might not be able to satisfy request */
543 ret = nf_conntrack_hash_resize(nf_conntrack_htable_size_user);
545 /* update it to the actual value used by conntrack */
546 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
550 static struct ctl_table_header *nf_ct_netfilter_header;
552 enum nf_ct_sysctl_index {
555 NF_SYSCTL_CT_BUCKETS,
556 NF_SYSCTL_CT_CHECKSUM,
557 NF_SYSCTL_CT_LOG_INVALID,
558 NF_SYSCTL_CT_EXPECT_MAX,
561 #ifdef CONFIG_NF_CONNTRACK_EVENTS
564 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
565 NF_SYSCTL_CT_TIMESTAMP,
567 NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC,
568 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT,
569 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV,
570 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED,
571 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT,
572 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT,
573 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK,
574 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT,
575 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE,
576 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS,
577 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK,
578 NF_SYSCTL_CT_PROTO_TCP_LOOSE,
579 NF_SYSCTL_CT_PROTO_TCP_LIBERAL,
580 NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS,
581 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP,
582 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM,
583 NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP,
584 NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6,
585 #ifdef CONFIG_NF_CT_PROTO_SCTP
586 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED,
587 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT,
588 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED,
589 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED,
590 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT,
591 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD,
592 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT,
593 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT,
594 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_ACKED,
596 #ifdef CONFIG_NF_CT_PROTO_DCCP
597 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST,
598 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND,
599 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN,
600 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN,
601 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ,
602 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING,
603 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT,
604 NF_SYSCTL_CT_PROTO_DCCP_LOOSE,
606 #ifdef CONFIG_NF_CT_PROTO_GRE
607 NF_SYSCTL_CT_PROTO_TIMEOUT_GRE,
608 NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM,
611 __NF_SYSCTL_CT_LAST_SYSCTL,
614 #define NF_SYSCTL_CT_LAST_SYSCTL (__NF_SYSCTL_CT_LAST_SYSCTL + 1)
616 static struct ctl_table nf_ct_sysctl_table[] = {
617 [NF_SYSCTL_CT_MAX] = {
618 .procname = "nf_conntrack_max",
619 .data = &nf_conntrack_max,
620 .maxlen = sizeof(int),
622 .proc_handler = proc_dointvec,
624 [NF_SYSCTL_CT_COUNT] = {
625 .procname = "nf_conntrack_count",
626 .maxlen = sizeof(int),
628 .proc_handler = proc_dointvec,
630 [NF_SYSCTL_CT_BUCKETS] = {
631 .procname = "nf_conntrack_buckets",
632 .data = &nf_conntrack_htable_size_user,
633 .maxlen = sizeof(unsigned int),
635 .proc_handler = nf_conntrack_hash_sysctl,
637 [NF_SYSCTL_CT_CHECKSUM] = {
638 .procname = "nf_conntrack_checksum",
639 .data = &init_net.ct.sysctl_checksum,
640 .maxlen = sizeof(u8),
642 .proc_handler = proc_dou8vec_minmax,
643 .extra1 = SYSCTL_ZERO,
644 .extra2 = SYSCTL_ONE,
646 [NF_SYSCTL_CT_LOG_INVALID] = {
647 .procname = "nf_conntrack_log_invalid",
648 .data = &init_net.ct.sysctl_log_invalid,
649 .maxlen = sizeof(u8),
651 .proc_handler = proc_dou8vec_minmax,
653 [NF_SYSCTL_CT_EXPECT_MAX] = {
654 .procname = "nf_conntrack_expect_max",
655 .data = &nf_ct_expect_max,
656 .maxlen = sizeof(int),
658 .proc_handler = proc_dointvec,
660 [NF_SYSCTL_CT_ACCT] = {
661 .procname = "nf_conntrack_acct",
662 .data = &init_net.ct.sysctl_acct,
663 .maxlen = sizeof(u8),
665 .proc_handler = proc_dou8vec_minmax,
666 .extra1 = SYSCTL_ZERO,
667 .extra2 = SYSCTL_ONE,
669 [NF_SYSCTL_CT_HELPER] = {
670 .procname = "nf_conntrack_helper",
671 .maxlen = sizeof(u8),
673 .proc_handler = proc_dou8vec_minmax,
674 .extra1 = SYSCTL_ZERO,
675 .extra2 = SYSCTL_ONE,
677 #ifdef CONFIG_NF_CONNTRACK_EVENTS
678 [NF_SYSCTL_CT_EVENTS] = {
679 .procname = "nf_conntrack_events",
680 .data = &init_net.ct.sysctl_events,
681 .maxlen = sizeof(u8),
683 .proc_handler = proc_dou8vec_minmax,
684 .extra1 = SYSCTL_ZERO,
685 .extra2 = SYSCTL_ONE,
688 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
689 [NF_SYSCTL_CT_TIMESTAMP] = {
690 .procname = "nf_conntrack_timestamp",
691 .data = &init_net.ct.sysctl_tstamp,
692 .maxlen = sizeof(u8),
694 .proc_handler = proc_dou8vec_minmax,
695 .extra1 = SYSCTL_ZERO,
696 .extra2 = SYSCTL_ONE,
699 [NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC] = {
700 .procname = "nf_conntrack_generic_timeout",
701 .maxlen = sizeof(unsigned int),
703 .proc_handler = proc_dointvec_jiffies,
705 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT] = {
706 .procname = "nf_conntrack_tcp_timeout_syn_sent",
707 .maxlen = sizeof(unsigned int),
709 .proc_handler = proc_dointvec_jiffies,
711 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV] = {
712 .procname = "nf_conntrack_tcp_timeout_syn_recv",
713 .maxlen = sizeof(unsigned int),
715 .proc_handler = proc_dointvec_jiffies,
717 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED] = {
718 .procname = "nf_conntrack_tcp_timeout_established",
719 .maxlen = sizeof(unsigned int),
721 .proc_handler = proc_dointvec_jiffies,
723 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT] = {
724 .procname = "nf_conntrack_tcp_timeout_fin_wait",
725 .maxlen = sizeof(unsigned int),
727 .proc_handler = proc_dointvec_jiffies,
729 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT] = {
730 .procname = "nf_conntrack_tcp_timeout_close_wait",
731 .maxlen = sizeof(unsigned int),
733 .proc_handler = proc_dointvec_jiffies,
735 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK] = {
736 .procname = "nf_conntrack_tcp_timeout_last_ack",
737 .maxlen = sizeof(unsigned int),
739 .proc_handler = proc_dointvec_jiffies,
741 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT] = {
742 .procname = "nf_conntrack_tcp_timeout_time_wait",
743 .maxlen = sizeof(unsigned int),
745 .proc_handler = proc_dointvec_jiffies,
747 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE] = {
748 .procname = "nf_conntrack_tcp_timeout_close",
749 .maxlen = sizeof(unsigned int),
751 .proc_handler = proc_dointvec_jiffies,
753 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS] = {
754 .procname = "nf_conntrack_tcp_timeout_max_retrans",
755 .maxlen = sizeof(unsigned int),
757 .proc_handler = proc_dointvec_jiffies,
759 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK] = {
760 .procname = "nf_conntrack_tcp_timeout_unacknowledged",
761 .maxlen = sizeof(unsigned int),
763 .proc_handler = proc_dointvec_jiffies,
765 [NF_SYSCTL_CT_PROTO_TCP_LOOSE] = {
766 .procname = "nf_conntrack_tcp_loose",
767 .maxlen = sizeof(u8),
769 .proc_handler = proc_dou8vec_minmax,
770 .extra1 = SYSCTL_ZERO,
771 .extra2 = SYSCTL_ONE,
773 [NF_SYSCTL_CT_PROTO_TCP_LIBERAL] = {
774 .procname = "nf_conntrack_tcp_be_liberal",
775 .maxlen = sizeof(u8),
777 .proc_handler = proc_dou8vec_minmax,
778 .extra1 = SYSCTL_ZERO,
779 .extra2 = SYSCTL_ONE,
781 [NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS] = {
782 .procname = "nf_conntrack_tcp_max_retrans",
783 .maxlen = sizeof(u8),
785 .proc_handler = proc_dou8vec_minmax,
787 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP] = {
788 .procname = "nf_conntrack_udp_timeout",
789 .maxlen = sizeof(unsigned int),
791 .proc_handler = proc_dointvec_jiffies,
793 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM] = {
794 .procname = "nf_conntrack_udp_timeout_stream",
795 .maxlen = sizeof(unsigned int),
797 .proc_handler = proc_dointvec_jiffies,
799 [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP] = {
800 .procname = "nf_conntrack_icmp_timeout",
801 .maxlen = sizeof(unsigned int),
803 .proc_handler = proc_dointvec_jiffies,
805 [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6] = {
806 .procname = "nf_conntrack_icmpv6_timeout",
807 .maxlen = sizeof(unsigned int),
809 .proc_handler = proc_dointvec_jiffies,
811 #ifdef CONFIG_NF_CT_PROTO_SCTP
812 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED] = {
813 .procname = "nf_conntrack_sctp_timeout_closed",
814 .maxlen = sizeof(unsigned int),
816 .proc_handler = proc_dointvec_jiffies,
818 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT] = {
819 .procname = "nf_conntrack_sctp_timeout_cookie_wait",
820 .maxlen = sizeof(unsigned int),
822 .proc_handler = proc_dointvec_jiffies,
824 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED] = {
825 .procname = "nf_conntrack_sctp_timeout_cookie_echoed",
826 .maxlen = sizeof(unsigned int),
828 .proc_handler = proc_dointvec_jiffies,
830 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED] = {
831 .procname = "nf_conntrack_sctp_timeout_established",
832 .maxlen = sizeof(unsigned int),
834 .proc_handler = proc_dointvec_jiffies,
836 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT] = {
837 .procname = "nf_conntrack_sctp_timeout_shutdown_sent",
838 .maxlen = sizeof(unsigned int),
840 .proc_handler = proc_dointvec_jiffies,
842 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD] = {
843 .procname = "nf_conntrack_sctp_timeout_shutdown_recd",
844 .maxlen = sizeof(unsigned int),
846 .proc_handler = proc_dointvec_jiffies,
848 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT] = {
849 .procname = "nf_conntrack_sctp_timeout_shutdown_ack_sent",
850 .maxlen = sizeof(unsigned int),
852 .proc_handler = proc_dointvec_jiffies,
854 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT] = {
855 .procname = "nf_conntrack_sctp_timeout_heartbeat_sent",
856 .maxlen = sizeof(unsigned int),
858 .proc_handler = proc_dointvec_jiffies,
860 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_ACKED] = {
861 .procname = "nf_conntrack_sctp_timeout_heartbeat_acked",
862 .maxlen = sizeof(unsigned int),
864 .proc_handler = proc_dointvec_jiffies,
867 #ifdef CONFIG_NF_CT_PROTO_DCCP
868 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST] = {
869 .procname = "nf_conntrack_dccp_timeout_request",
870 .maxlen = sizeof(unsigned int),
872 .proc_handler = proc_dointvec_jiffies,
874 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND] = {
875 .procname = "nf_conntrack_dccp_timeout_respond",
876 .maxlen = sizeof(unsigned int),
878 .proc_handler = proc_dointvec_jiffies,
880 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN] = {
881 .procname = "nf_conntrack_dccp_timeout_partopen",
882 .maxlen = sizeof(unsigned int),
884 .proc_handler = proc_dointvec_jiffies,
886 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN] = {
887 .procname = "nf_conntrack_dccp_timeout_open",
888 .maxlen = sizeof(unsigned int),
890 .proc_handler = proc_dointvec_jiffies,
892 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ] = {
893 .procname = "nf_conntrack_dccp_timeout_closereq",
894 .maxlen = sizeof(unsigned int),
896 .proc_handler = proc_dointvec_jiffies,
898 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING] = {
899 .procname = "nf_conntrack_dccp_timeout_closing",
900 .maxlen = sizeof(unsigned int),
902 .proc_handler = proc_dointvec_jiffies,
904 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT] = {
905 .procname = "nf_conntrack_dccp_timeout_timewait",
906 .maxlen = sizeof(unsigned int),
908 .proc_handler = proc_dointvec_jiffies,
910 [NF_SYSCTL_CT_PROTO_DCCP_LOOSE] = {
911 .procname = "nf_conntrack_dccp_loose",
912 .maxlen = sizeof(u8),
914 .proc_handler = proc_dou8vec_minmax,
915 .extra1 = SYSCTL_ZERO,
916 .extra2 = SYSCTL_ONE,
919 #ifdef CONFIG_NF_CT_PROTO_GRE
920 [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE] = {
921 .procname = "nf_conntrack_gre_timeout",
922 .maxlen = sizeof(unsigned int),
924 .proc_handler = proc_dointvec_jiffies,
926 [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM] = {
927 .procname = "nf_conntrack_gre_timeout_stream",
928 .maxlen = sizeof(unsigned int),
930 .proc_handler = proc_dointvec_jiffies,
936 static struct ctl_table nf_ct_netfilter_table[] = {
938 .procname = "nf_conntrack_max",
939 .data = &nf_conntrack_max,
940 .maxlen = sizeof(int),
942 .proc_handler = proc_dointvec,
947 static void nf_conntrack_standalone_init_tcp_sysctl(struct net *net,
948 struct ctl_table *table)
950 struct nf_tcp_net *tn = nf_tcp_pernet(net);
952 #define XASSIGN(XNAME, tn) \
953 table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ ## XNAME].data = \
954 &(tn)->timeouts[TCP_CONNTRACK_ ## XNAME]
956 XASSIGN(SYN_SENT, tn);
957 XASSIGN(SYN_RECV, tn);
958 XASSIGN(ESTABLISHED, tn);
959 XASSIGN(FIN_WAIT, tn);
960 XASSIGN(CLOSE_WAIT, tn);
961 XASSIGN(LAST_ACK, tn);
962 XASSIGN(TIME_WAIT, tn);
964 XASSIGN(RETRANS, tn);
967 #define XASSIGN(XNAME, rval) \
968 table[NF_SYSCTL_CT_PROTO_TCP_ ## XNAME].data = (rval)
970 XASSIGN(LOOSE, &tn->tcp_loose);
971 XASSIGN(LIBERAL, &tn->tcp_be_liberal);
972 XASSIGN(MAX_RETRANS, &tn->tcp_max_retrans);
976 static void nf_conntrack_standalone_init_sctp_sysctl(struct net *net,
977 struct ctl_table *table)
979 #ifdef CONFIG_NF_CT_PROTO_SCTP
980 struct nf_sctp_net *sn = nf_sctp_pernet(net);
982 #define XASSIGN(XNAME, sn) \
983 table[NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ ## XNAME].data = \
984 &(sn)->timeouts[SCTP_CONNTRACK_ ## XNAME]
987 XASSIGN(COOKIE_WAIT, sn);
988 XASSIGN(COOKIE_ECHOED, sn);
989 XASSIGN(ESTABLISHED, sn);
990 XASSIGN(SHUTDOWN_SENT, sn);
991 XASSIGN(SHUTDOWN_RECD, sn);
992 XASSIGN(SHUTDOWN_ACK_SENT, sn);
993 XASSIGN(HEARTBEAT_SENT, sn);
994 XASSIGN(HEARTBEAT_ACKED, sn);
999 static void nf_conntrack_standalone_init_dccp_sysctl(struct net *net,
1000 struct ctl_table *table)
1002 #ifdef CONFIG_NF_CT_PROTO_DCCP
1003 struct nf_dccp_net *dn = nf_dccp_pernet(net);
1005 #define XASSIGN(XNAME, dn) \
1006 table[NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_ ## XNAME].data = \
1007 &(dn)->dccp_timeout[CT_DCCP_ ## XNAME]
1009 XASSIGN(REQUEST, dn);
1010 XASSIGN(RESPOND, dn);
1011 XASSIGN(PARTOPEN, dn);
1013 XASSIGN(CLOSEREQ, dn);
1014 XASSIGN(CLOSING, dn);
1015 XASSIGN(TIMEWAIT, dn);
1018 table[NF_SYSCTL_CT_PROTO_DCCP_LOOSE].data = &dn->dccp_loose;
1022 static void nf_conntrack_standalone_init_gre_sysctl(struct net *net,
1023 struct ctl_table *table)
1025 #ifdef CONFIG_NF_CT_PROTO_GRE
1026 struct nf_gre_net *gn = nf_gre_pernet(net);
1028 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE].data = &gn->timeouts[GRE_CT_UNREPLIED];
1029 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM].data = &gn->timeouts[GRE_CT_REPLIED];
1033 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1035 struct nf_conntrack_net *cnet = net_generic(net, nf_conntrack_net_id);
1036 struct nf_udp_net *un = nf_udp_pernet(net);
1037 struct ctl_table *table;
1039 BUILD_BUG_ON(ARRAY_SIZE(nf_ct_sysctl_table) != NF_SYSCTL_CT_LAST_SYSCTL);
1041 table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table),
1046 table[NF_SYSCTL_CT_COUNT].data = &cnet->count;
1047 table[NF_SYSCTL_CT_CHECKSUM].data = &net->ct.sysctl_checksum;
1048 table[NF_SYSCTL_CT_LOG_INVALID].data = &net->ct.sysctl_log_invalid;
1049 table[NF_SYSCTL_CT_ACCT].data = &net->ct.sysctl_acct;
1050 table[NF_SYSCTL_CT_HELPER].data = &cnet->sysctl_auto_assign_helper;
1051 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1052 table[NF_SYSCTL_CT_EVENTS].data = &net->ct.sysctl_events;
1054 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
1055 table[NF_SYSCTL_CT_TIMESTAMP].data = &net->ct.sysctl_tstamp;
1057 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC].data = &nf_generic_pernet(net)->timeout;
1058 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP].data = &nf_icmp_pernet(net)->timeout;
1059 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6].data = &nf_icmpv6_pernet(net)->timeout;
1060 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP].data = &un->timeouts[UDP_CT_UNREPLIED];
1061 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM].data = &un->timeouts[UDP_CT_REPLIED];
1063 nf_conntrack_standalone_init_tcp_sysctl(net, table);
1064 nf_conntrack_standalone_init_sctp_sysctl(net, table);
1065 nf_conntrack_standalone_init_dccp_sysctl(net, table);
1066 nf_conntrack_standalone_init_gre_sysctl(net, table);
1068 /* Don't allow non-init_net ns to alter global sysctls */
1069 if (!net_eq(&init_net, net)) {
1070 table[NF_SYSCTL_CT_MAX].mode = 0444;
1071 table[NF_SYSCTL_CT_EXPECT_MAX].mode = 0444;
1072 table[NF_SYSCTL_CT_BUCKETS].mode = 0444;
1075 cnet->sysctl_header = register_net_sysctl(net, "net/netfilter", table);
1076 if (!cnet->sysctl_header)
1077 goto out_unregister_netfilter;
1081 out_unregister_netfilter:
1086 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1088 struct nf_conntrack_net *cnet = net_generic(net, nf_conntrack_net_id);
1089 struct ctl_table *table;
1091 table = cnet->sysctl_header->ctl_table_arg;
1092 unregister_net_sysctl_table(cnet->sysctl_header);
1096 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1101 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1104 #endif /* CONFIG_SYSCTL */
1106 static void nf_conntrack_fini_net(struct net *net)
1109 nf_ct_netns_put(net, NFPROTO_INET);
1111 nf_conntrack_standalone_fini_proc(net);
1112 nf_conntrack_standalone_fini_sysctl(net);
1115 static int nf_conntrack_pernet_init(struct net *net)
1119 net->ct.sysctl_checksum = 1;
1121 ret = nf_conntrack_standalone_init_sysctl(net);
1125 ret = nf_conntrack_standalone_init_proc(net);
1129 ret = nf_conntrack_init_net(net);
1134 ret = nf_ct_netns_get(net, NFPROTO_INET);
1142 nf_conntrack_cleanup_net(net);
1144 nf_conntrack_standalone_fini_proc(net);
1146 nf_conntrack_standalone_fini_sysctl(net);
1150 static void nf_conntrack_pernet_exit(struct list_head *net_exit_list)
1154 list_for_each_entry(net, net_exit_list, exit_list)
1155 nf_conntrack_fini_net(net);
1157 nf_conntrack_cleanup_net_list(net_exit_list);
1160 static struct pernet_operations nf_conntrack_net_ops = {
1161 .init = nf_conntrack_pernet_init,
1162 .exit_batch = nf_conntrack_pernet_exit,
1163 .id = &nf_conntrack_net_id,
1164 .size = sizeof(struct nf_conntrack_net),
1167 static int __init nf_conntrack_standalone_init(void)
1169 int ret = nf_conntrack_init_start();
1173 BUILD_BUG_ON(NFCT_INFOMASK <= IP_CT_NUMBER);
1175 #ifdef CONFIG_SYSCTL
1176 nf_ct_netfilter_header =
1177 register_net_sysctl(&init_net, "net", nf_ct_netfilter_table);
1178 if (!nf_ct_netfilter_header) {
1179 pr_err("nf_conntrack: can't register to sysctl.\n");
1184 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
1187 ret = register_pernet_subsys(&nf_conntrack_net_ops);
1191 nf_conntrack_init_end();
1195 #ifdef CONFIG_SYSCTL
1196 unregister_net_sysctl_table(nf_ct_netfilter_header);
1199 nf_conntrack_cleanup_end();
1204 static void __exit nf_conntrack_standalone_fini(void)
1206 nf_conntrack_cleanup_start();
1207 unregister_pernet_subsys(&nf_conntrack_net_ops);
1208 #ifdef CONFIG_SYSCTL
1209 unregister_net_sysctl_table(nf_ct_netfilter_header);
1211 nf_conntrack_cleanup_end();
1214 module_init(nf_conntrack_standalone_init);
1215 module_exit(nf_conntrack_standalone_fini);