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(!atomic_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", atomic_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
);