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>
13 #ifdef CONFIG_SYSCTL
14 #include <linux/sysctl.h>
15 #endif
16
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>
26
27 static bool enable_hooks __read_mostly;
28 MODULE_PARM_DESC(enable_hooks, "Always enable conntrack hooks");
29 module_param(enable_hooks, bool, 0000);
30
31 unsigned int nf_conntrack_net_id __read_mostly;
32
33 #ifdef CONFIG_NF_CONNTRACK_PROCFS
34 void
print_tuple(struct seq_file * s,const struct nf_conntrack_tuple * tuple,const struct nf_conntrack_l4proto * l4proto)35 print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
36 const struct nf_conntrack_l4proto *l4proto)
37 {
38 switch (tuple->src.l3num) {
39 case NFPROTO_IPV4:
40 seq_printf(s, "src=%pI4 dst=%pI4 ",
41 &tuple->src.u3.ip, &tuple->dst.u3.ip);
42 break;
43 case NFPROTO_IPV6:
44 seq_printf(s, "src=%pI6 dst=%pI6 ",
45 tuple->src.u3.ip6, tuple->dst.u3.ip6);
46 break;
47 default:
48 break;
49 }
50
51 switch (l4proto->l4proto) {
52 case IPPROTO_ICMP:
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));
57 break;
58 case IPPROTO_TCP:
59 seq_printf(s, "sport=%hu dport=%hu ",
60 ntohs(tuple->src.u.tcp.port),
61 ntohs(tuple->dst.u.tcp.port));
62 break;
63 case IPPROTO_UDPLITE:
64 case IPPROTO_UDP:
65 seq_printf(s, "sport=%hu dport=%hu ",
66 ntohs(tuple->src.u.udp.port),
67 ntohs(tuple->dst.u.udp.port));
68
69 break;
70 case IPPROTO_DCCP:
71 seq_printf(s, "sport=%hu dport=%hu ",
72 ntohs(tuple->src.u.dccp.port),
73 ntohs(tuple->dst.u.dccp.port));
74 break;
75 case IPPROTO_SCTP:
76 seq_printf(s, "sport=%hu dport=%hu ",
77 ntohs(tuple->src.u.sctp.port),
78 ntohs(tuple->dst.u.sctp.port));
79 break;
80 case IPPROTO_ICMPV6:
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));
85 break;
86 case IPPROTO_GRE:
87 seq_printf(s, "srckey=0x%x dstkey=0x%x ",
88 ntohs(tuple->src.u.gre.key),
89 ntohs(tuple->dst.u.gre.key));
90 break;
91 default:
92 break;
93 }
94 }
95 EXPORT_SYMBOL_GPL(print_tuple);
96
97 struct ct_iter_state {
98 struct seq_net_private p;
99 struct hlist_nulls_head *hash;
100 unsigned int htable_size;
101 unsigned int bucket;
102 u_int64_t time_now;
103 };
104
ct_get_first(struct seq_file * seq)105 static struct hlist_nulls_node *ct_get_first(struct seq_file *seq)
106 {
107 struct ct_iter_state *st = seq->private;
108 struct hlist_nulls_node *n;
109
110 for (st->bucket = 0;
111 st->bucket < st->htable_size;
112 st->bucket++) {
113 n = rcu_dereference(
114 hlist_nulls_first_rcu(&st->hash[st->bucket]));
115 if (!is_a_nulls(n))
116 return n;
117 }
118 return NULL;
119 }
120
ct_get_next(struct seq_file * seq,struct hlist_nulls_node * head)121 static struct hlist_nulls_node *ct_get_next(struct seq_file *seq,
122 struct hlist_nulls_node *head)
123 {
124 struct ct_iter_state *st = seq->private;
125
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)
130 return NULL;
131 }
132 head = rcu_dereference(
133 hlist_nulls_first_rcu(&st->hash[st->bucket]));
134 }
135 return head;
136 }
137
ct_get_idx(struct seq_file * seq,loff_t pos)138 static struct hlist_nulls_node *ct_get_idx(struct seq_file *seq, loff_t pos)
139 {
140 struct hlist_nulls_node *head = ct_get_first(seq);
141
142 if (head)
143 while (pos && (head = ct_get_next(seq, head)))
144 pos--;
145 return pos ? NULL : head;
146 }
147
ct_seq_start(struct seq_file * seq,loff_t * pos)148 static void *ct_seq_start(struct seq_file *seq, loff_t *pos)
149 __acquires(RCU)
150 {
151 struct ct_iter_state *st = seq->private;
152
153 st->time_now = ktime_get_real_ns();
154 rcu_read_lock();
155
156 nf_conntrack_get_ht(&st->hash, &st->htable_size);
157 return ct_get_idx(seq, *pos);
158 }
159
ct_seq_next(struct seq_file * s,void * v,loff_t * pos)160 static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos)
161 {
162 (*pos)++;
163 return ct_get_next(s, v);
164 }
165
ct_seq_stop(struct seq_file * s,void * v)166 static void ct_seq_stop(struct seq_file *s, void *v)
167 __releases(RCU)
168 {
169 rcu_read_unlock();
170 }
171
172 #ifdef CONFIG_NF_CONNTRACK_SECMARK
ct_show_secctx(struct seq_file * s,const struct nf_conn * ct)173 static void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
174 {
175 int ret;
176 u32 len;
177 char *secctx;
178
179 ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
180 if (ret)
181 return;
182
183 seq_printf(s, "secctx=%s ", secctx);
184
185 security_release_secctx(secctx, len);
186 }
187 #else
ct_show_secctx(struct seq_file * s,const struct nf_conn * ct)188 static inline void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
189 {
190 }
191 #endif
192
193 #ifdef CONFIG_NF_CONNTRACK_ZONES
ct_show_zone(struct seq_file * s,const struct nf_conn * ct,int dir)194 static void ct_show_zone(struct seq_file *s, const struct nf_conn *ct,
195 int dir)
196 {
197 const struct nf_conntrack_zone *zone = nf_ct_zone(ct);
198
199 if (zone->dir != dir)
200 return;
201 switch (zone->dir) {
202 case NF_CT_DEFAULT_ZONE_DIR:
203 seq_printf(s, "zone=%u ", zone->id);
204 break;
205 case NF_CT_ZONE_DIR_ORIG:
206 seq_printf(s, "zone-orig=%u ", zone->id);
207 break;
208 case NF_CT_ZONE_DIR_REPL:
209 seq_printf(s, "zone-reply=%u ", zone->id);
210 break;
211 default:
212 break;
213 }
214 }
215 #else
ct_show_zone(struct seq_file * s,const struct nf_conn * ct,int dir)216 static inline void ct_show_zone(struct seq_file *s, const struct nf_conn *ct,
217 int dir)
218 {
219 }
220 #endif
221
222 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
ct_show_delta_time(struct seq_file * s,const struct nf_conn * ct)223 static void ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct)
224 {
225 struct ct_iter_state *st = s->private;
226 struct nf_conn_tstamp *tstamp;
227 s64 delta_time;
228
229 tstamp = nf_conn_tstamp_find(ct);
230 if (tstamp) {
231 delta_time = st->time_now - tstamp->start;
232 if (delta_time > 0)
233 delta_time = div_s64(delta_time, NSEC_PER_SEC);
234 else
235 delta_time = 0;
236
237 seq_printf(s, "delta-time=%llu ",
238 (unsigned long long)delta_time);
239 }
240 return;
241 }
242 #else
243 static inline void
ct_show_delta_time(struct seq_file * s,const struct nf_conn * ct)244 ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct)
245 {
246 }
247 #endif
248
l3proto_name(u16 proto)249 static const char* l3proto_name(u16 proto)
250 {
251 switch (proto) {
252 case AF_INET: return "ipv4";
253 case AF_INET6: return "ipv6";
254 }
255
256 return "unknown";
257 }
258
l4proto_name(u16 proto)259 static const char* l4proto_name(u16 proto)
260 {
261 switch (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";
270 }
271
272 return "unknown";
273 }
274
275 static void
seq_print_acct(struct seq_file * s,const struct nf_conn * ct,int dir)276 seq_print_acct(struct seq_file *s, const struct nf_conn *ct, int dir)
277 {
278 struct nf_conn_acct *acct;
279 struct nf_conn_counter *counter;
280
281 acct = nf_conn_acct_find(ct);
282 if (!acct)
283 return;
284
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));
289 }
290
291 /* return 0 on success, 1 in case of error */
ct_seq_show(struct seq_file * s,void * v)292 static int ct_seq_show(struct seq_file *s, void *v)
293 {
294 struct nf_conntrack_tuple_hash *hash = v;
295 struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
296 const struct nf_conntrack_l4proto *l4proto;
297 struct net *net = seq_file_net(s);
298 int ret = 0;
299
300 WARN_ON(!ct);
301 if (unlikely(!refcount_inc_not_zero(&ct->ct_general.use)))
302 return 0;
303
304 /* load ->status after refcount increase */
305 smp_acquire__after_ctrl_dep();
306
307 if (nf_ct_should_gc(ct)) {
308 nf_ct_kill(ct);
309 goto release;
310 }
311
312 /* we only want to print DIR_ORIGINAL */
313 if (NF_CT_DIRECTION(hash))
314 goto release;
315
316 if (!net_eq(nf_ct_net(ct), net))
317 goto release;
318
319 l4proto = nf_ct_l4proto_find(nf_ct_protonum(ct));
320
321 ret = -ENOSPC;
322 seq_printf(s, "%-8s %u %-8s %u ",
323 l3proto_name(nf_ct_l3num(ct)), nf_ct_l3num(ct),
324 l4proto_name(l4proto->l4proto), nf_ct_protonum(ct));
325
326 if (!test_bit(IPS_OFFLOAD_BIT, &ct->status))
327 seq_printf(s, "%ld ", nf_ct_expires(ct) / HZ);
328
329 if (l4proto->print_conntrack)
330 l4proto->print_conntrack(s, ct);
331
332 print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
333 l4proto);
334
335 ct_show_zone(s, ct, NF_CT_ZONE_DIR_ORIG);
336
337 if (seq_has_overflowed(s))
338 goto release;
339
340 seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL);
341
342 if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
343 seq_puts(s, "[UNREPLIED] ");
344
345 print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, l4proto);
346
347 ct_show_zone(s, ct, NF_CT_ZONE_DIR_REPL);
348
349 seq_print_acct(s, ct, IP_CT_DIR_REPLY);
350
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] ");
357
358 if (seq_has_overflowed(s))
359 goto release;
360
361 #if defined(CONFIG_NF_CONNTRACK_MARK)
362 seq_printf(s, "mark=%u ", READ_ONCE(ct->mark));
363 #endif
364
365 ct_show_secctx(s, ct);
366 ct_show_zone(s, ct, NF_CT_DEFAULT_ZONE_DIR);
367 ct_show_delta_time(s, ct);
368
369 seq_printf(s, "use=%u\n", refcount_read(&ct->ct_general.use));
370
371 if (seq_has_overflowed(s))
372 goto release;
373
374 ret = 0;
375 release:
376 nf_ct_put(ct);
377 return ret;
378 }
379
380 static const struct seq_operations ct_seq_ops = {
381 .start = ct_seq_start,
382 .next = ct_seq_next,
383 .stop = ct_seq_stop,
384 .show = ct_seq_show
385 };
386
ct_cpu_seq_start(struct seq_file * seq,loff_t * pos)387 static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
388 {
389 struct net *net = seq_file_net(seq);
390 int cpu;
391
392 if (*pos == 0)
393 return SEQ_START_TOKEN;
394
395 for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) {
396 if (!cpu_possible(cpu))
397 continue;
398 *pos = cpu + 1;
399 return per_cpu_ptr(net->ct.stat, cpu);
400 }
401
402 return NULL;
403 }
404
ct_cpu_seq_next(struct seq_file * seq,void * v,loff_t * pos)405 static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
406 {
407 struct net *net = seq_file_net(seq);
408 int cpu;
409
410 for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) {
411 if (!cpu_possible(cpu))
412 continue;
413 *pos = cpu + 1;
414 return per_cpu_ptr(net->ct.stat, cpu);
415 }
416 (*pos)++;
417 return NULL;
418 }
419
ct_cpu_seq_stop(struct seq_file * seq,void * v)420 static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
421 {
422 }
423
ct_cpu_seq_show(struct seq_file * seq,void * v)424 static int ct_cpu_seq_show(struct seq_file *seq, void *v)
425 {
426 struct net *net = seq_file_net(seq);
427 const struct ip_conntrack_stat *st = v;
428 unsigned int nr_conntracks;
429
430 if (v == SEQ_START_TOKEN) {
431 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");
432 return 0;
433 }
434
435 nr_conntracks = nf_conntrack_count(net);
436
437 seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
438 "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n",
439 nr_conntracks,
440 st->clash_resolve,
441 st->found,
442 0,
443 st->invalid,
444 0,
445 0,
446 st->chaintoolong,
447 st->insert,
448 st->insert_failed,
449 st->drop,
450 st->early_drop,
451 st->error,
452
453 st->expect_new,
454 st->expect_create,
455 st->expect_delete,
456 st->search_restart
457 );
458 return 0;
459 }
460
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,
466 };
467
nf_conntrack_standalone_init_proc(struct net * net)468 static int nf_conntrack_standalone_init_proc(struct net *net)
469 {
470 struct proc_dir_entry *pde;
471 kuid_t root_uid;
472 kgid_t root_gid;
473
474 pde = proc_create_net("nf_conntrack", 0440, net->proc_net, &ct_seq_ops,
475 sizeof(struct ct_iter_state));
476 if (!pde)
477 goto out_nf_conntrack;
478
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);
483
484 pde = proc_create_net("nf_conntrack", 0444, net->proc_net_stat,
485 &ct_cpu_seq_ops, sizeof(struct seq_net_private));
486 if (!pde)
487 goto out_stat_nf_conntrack;
488 return 0;
489
490 out_stat_nf_conntrack:
491 remove_proc_entry("nf_conntrack", net->proc_net);
492 out_nf_conntrack:
493 return -ENOMEM;
494 }
495
nf_conntrack_standalone_fini_proc(struct net * net)496 static void nf_conntrack_standalone_fini_proc(struct net *net)
497 {
498 remove_proc_entry("nf_conntrack", net->proc_net_stat);
499 remove_proc_entry("nf_conntrack", net->proc_net);
500 }
501 #else
nf_conntrack_standalone_init_proc(struct net * net)502 static int nf_conntrack_standalone_init_proc(struct net *net)
503 {
504 return 0;
505 }
506
nf_conntrack_standalone_fini_proc(struct net * net)507 static void nf_conntrack_standalone_fini_proc(struct net *net)
508 {
509 }
510 #endif /* CONFIG_NF_CONNTRACK_PROCFS */
511
nf_conntrack_count(const struct net * net)512 u32 nf_conntrack_count(const struct net *net)
513 {
514 const struct nf_conntrack_net *cnet = nf_ct_pernet(net);
515
516 return atomic_read(&cnet->count);
517 }
518 EXPORT_SYMBOL_GPL(nf_conntrack_count);
519
520 /* Sysctl support */
521
522 #ifdef CONFIG_SYSCTL
523 /* size the user *wants to set */
524 static unsigned int nf_conntrack_htable_size_user __read_mostly;
525
526 static int
nf_conntrack_hash_sysctl(struct ctl_table * table,int write,void * buffer,size_t * lenp,loff_t * ppos)527 nf_conntrack_hash_sysctl(struct ctl_table *table, int write,
528 void *buffer, size_t *lenp, loff_t *ppos)
529 {
530 int ret;
531
532 /* module_param hashsize could have changed value */
533 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
534
535 ret = proc_dointvec(table, write, buffer, lenp, ppos);
536 if (ret < 0 || !write)
537 return ret;
538
539 /* update ret, we might not be able to satisfy request */
540 ret = nf_conntrack_hash_resize(nf_conntrack_htable_size_user);
541
542 /* update it to the actual value used by conntrack */
543 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
544 return ret;
545 }
546
547 static struct ctl_table_header *nf_ct_netfilter_header;
548
549 enum nf_ct_sysctl_index {
550 NF_SYSCTL_CT_MAX,
551 NF_SYSCTL_CT_COUNT,
552 NF_SYSCTL_CT_BUCKETS,
553 NF_SYSCTL_CT_CHECKSUM,
554 NF_SYSCTL_CT_LOG_INVALID,
555 NF_SYSCTL_CT_EXPECT_MAX,
556 NF_SYSCTL_CT_ACCT,
557 #ifdef CONFIG_NF_CONNTRACK_EVENTS
558 NF_SYSCTL_CT_EVENTS,
559 #endif
560 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
561 NF_SYSCTL_CT_TIMESTAMP,
562 #endif
563 NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC,
564 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT,
565 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV,
566 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED,
567 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT,
568 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT,
569 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK,
570 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT,
571 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE,
572 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS,
573 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK,
574 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
575 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD,
576 #endif
577 NF_SYSCTL_CT_PROTO_TCP_LOOSE,
578 NF_SYSCTL_CT_PROTO_TCP_LIBERAL,
579 NF_SYSCTL_CT_PROTO_TCP_IGNORE_INVALID_RST,
580 NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS,
581 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP,
582 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM,
583 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
584 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD,
585 #endif
586 NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP,
587 NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6,
588 #ifdef CONFIG_NF_CT_PROTO_SCTP
589 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED,
590 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT,
591 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED,
592 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED,
593 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT,
594 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD,
595 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT,
596 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT,
597 #endif
598 #ifdef CONFIG_NF_CT_PROTO_DCCP
599 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST,
600 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND,
601 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN,
602 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN,
603 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ,
604 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING,
605 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT,
606 NF_SYSCTL_CT_PROTO_DCCP_LOOSE,
607 #endif
608 #ifdef CONFIG_NF_CT_PROTO_GRE
609 NF_SYSCTL_CT_PROTO_TIMEOUT_GRE,
610 NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM,
611 #endif
612
613 __NF_SYSCTL_CT_LAST_SYSCTL,
614 };
615
616 #define NF_SYSCTL_CT_LAST_SYSCTL (__NF_SYSCTL_CT_LAST_SYSCTL + 1)
617
618 static struct ctl_table nf_ct_sysctl_table[] = {
619 [NF_SYSCTL_CT_MAX] = {
620 .procname = "nf_conntrack_max",
621 .data = &nf_conntrack_max,
622 .maxlen = sizeof(int),
623 .mode = 0644,
624 .proc_handler = proc_dointvec_minmax,
625 .extra1 = SYSCTL_ZERO,
626 .extra2 = SYSCTL_INT_MAX,
627 },
628 [NF_SYSCTL_CT_COUNT] = {
629 .procname = "nf_conntrack_count",
630 .maxlen = sizeof(int),
631 .mode = 0444,
632 .proc_handler = proc_dointvec,
633 },
634 [NF_SYSCTL_CT_BUCKETS] = {
635 .procname = "nf_conntrack_buckets",
636 .data = &nf_conntrack_htable_size_user,
637 .maxlen = sizeof(unsigned int),
638 .mode = 0644,
639 .proc_handler = nf_conntrack_hash_sysctl,
640 },
641 [NF_SYSCTL_CT_CHECKSUM] = {
642 .procname = "nf_conntrack_checksum",
643 .data = &init_net.ct.sysctl_checksum,
644 .maxlen = sizeof(u8),
645 .mode = 0644,
646 .proc_handler = proc_dou8vec_minmax,
647 .extra1 = SYSCTL_ZERO,
648 .extra2 = SYSCTL_ONE,
649 },
650 [NF_SYSCTL_CT_LOG_INVALID] = {
651 .procname = "nf_conntrack_log_invalid",
652 .data = &init_net.ct.sysctl_log_invalid,
653 .maxlen = sizeof(u8),
654 .mode = 0644,
655 .proc_handler = proc_dou8vec_minmax,
656 },
657 [NF_SYSCTL_CT_EXPECT_MAX] = {
658 .procname = "nf_conntrack_expect_max",
659 .data = &nf_ct_expect_max,
660 .maxlen = sizeof(int),
661 .mode = 0644,
662 .proc_handler = proc_dointvec_minmax,
663 .extra1 = SYSCTL_ONE,
664 .extra2 = SYSCTL_INT_MAX,
665 },
666 [NF_SYSCTL_CT_ACCT] = {
667 .procname = "nf_conntrack_acct",
668 .data = &init_net.ct.sysctl_acct,
669 .maxlen = sizeof(u8),
670 .mode = 0644,
671 .proc_handler = proc_dou8vec_minmax,
672 .extra1 = SYSCTL_ZERO,
673 .extra2 = SYSCTL_ONE,
674 },
675 #ifdef CONFIG_NF_CONNTRACK_EVENTS
676 [NF_SYSCTL_CT_EVENTS] = {
677 .procname = "nf_conntrack_events",
678 .data = &init_net.ct.sysctl_events,
679 .maxlen = sizeof(u8),
680 .mode = 0644,
681 .proc_handler = proc_dou8vec_minmax,
682 .extra1 = SYSCTL_ZERO,
683 .extra2 = SYSCTL_TWO,
684 },
685 #endif
686 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
687 [NF_SYSCTL_CT_TIMESTAMP] = {
688 .procname = "nf_conntrack_timestamp",
689 .data = &init_net.ct.sysctl_tstamp,
690 .maxlen = sizeof(u8),
691 .mode = 0644,
692 .proc_handler = proc_dou8vec_minmax,
693 .extra1 = SYSCTL_ZERO,
694 .extra2 = SYSCTL_ONE,
695 },
696 #endif
697 [NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC] = {
698 .procname = "nf_conntrack_generic_timeout",
699 .maxlen = sizeof(unsigned int),
700 .mode = 0644,
701 .proc_handler = proc_dointvec_jiffies,
702 },
703 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT] = {
704 .procname = "nf_conntrack_tcp_timeout_syn_sent",
705 .maxlen = sizeof(unsigned int),
706 .mode = 0644,
707 .proc_handler = proc_dointvec_jiffies,
708 },
709 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV] = {
710 .procname = "nf_conntrack_tcp_timeout_syn_recv",
711 .maxlen = sizeof(unsigned int),
712 .mode = 0644,
713 .proc_handler = proc_dointvec_jiffies,
714 },
715 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED] = {
716 .procname = "nf_conntrack_tcp_timeout_established",
717 .maxlen = sizeof(unsigned int),
718 .mode = 0644,
719 .proc_handler = proc_dointvec_jiffies,
720 },
721 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT] = {
722 .procname = "nf_conntrack_tcp_timeout_fin_wait",
723 .maxlen = sizeof(unsigned int),
724 .mode = 0644,
725 .proc_handler = proc_dointvec_jiffies,
726 },
727 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT] = {
728 .procname = "nf_conntrack_tcp_timeout_close_wait",
729 .maxlen = sizeof(unsigned int),
730 .mode = 0644,
731 .proc_handler = proc_dointvec_jiffies,
732 },
733 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK] = {
734 .procname = "nf_conntrack_tcp_timeout_last_ack",
735 .maxlen = sizeof(unsigned int),
736 .mode = 0644,
737 .proc_handler = proc_dointvec_jiffies,
738 },
739 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT] = {
740 .procname = "nf_conntrack_tcp_timeout_time_wait",
741 .maxlen = sizeof(unsigned int),
742 .mode = 0644,
743 .proc_handler = proc_dointvec_jiffies,
744 },
745 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE] = {
746 .procname = "nf_conntrack_tcp_timeout_close",
747 .maxlen = sizeof(unsigned int),
748 .mode = 0644,
749 .proc_handler = proc_dointvec_jiffies,
750 },
751 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS] = {
752 .procname = "nf_conntrack_tcp_timeout_max_retrans",
753 .maxlen = sizeof(unsigned int),
754 .mode = 0644,
755 .proc_handler = proc_dointvec_jiffies,
756 },
757 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK] = {
758 .procname = "nf_conntrack_tcp_timeout_unacknowledged",
759 .maxlen = sizeof(unsigned int),
760 .mode = 0644,
761 .proc_handler = proc_dointvec_jiffies,
762 },
763 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
764 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD] = {
765 .procname = "nf_flowtable_tcp_timeout",
766 .maxlen = sizeof(unsigned int),
767 .mode = 0644,
768 .proc_handler = proc_dointvec_jiffies,
769 },
770 #endif
771 [NF_SYSCTL_CT_PROTO_TCP_LOOSE] = {
772 .procname = "nf_conntrack_tcp_loose",
773 .maxlen = sizeof(u8),
774 .mode = 0644,
775 .proc_handler = proc_dou8vec_minmax,
776 .extra1 = SYSCTL_ZERO,
777 .extra2 = SYSCTL_ONE,
778 },
779 [NF_SYSCTL_CT_PROTO_TCP_LIBERAL] = {
780 .procname = "nf_conntrack_tcp_be_liberal",
781 .maxlen = sizeof(u8),
782 .mode = 0644,
783 .proc_handler = proc_dou8vec_minmax,
784 .extra1 = SYSCTL_ZERO,
785 .extra2 = SYSCTL_ONE,
786 },
787 [NF_SYSCTL_CT_PROTO_TCP_IGNORE_INVALID_RST] = {
788 .procname = "nf_conntrack_tcp_ignore_invalid_rst",
789 .maxlen = sizeof(u8),
790 .mode = 0644,
791 .proc_handler = proc_dou8vec_minmax,
792 .extra1 = SYSCTL_ZERO,
793 .extra2 = SYSCTL_ONE,
794 },
795 [NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS] = {
796 .procname = "nf_conntrack_tcp_max_retrans",
797 .maxlen = sizeof(u8),
798 .mode = 0644,
799 .proc_handler = proc_dou8vec_minmax,
800 },
801 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP] = {
802 .procname = "nf_conntrack_udp_timeout",
803 .maxlen = sizeof(unsigned int),
804 .mode = 0644,
805 .proc_handler = proc_dointvec_jiffies,
806 },
807 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM] = {
808 .procname = "nf_conntrack_udp_timeout_stream",
809 .maxlen = sizeof(unsigned int),
810 .mode = 0644,
811 .proc_handler = proc_dointvec_jiffies,
812 },
813 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
814 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD] = {
815 .procname = "nf_flowtable_udp_timeout",
816 .maxlen = sizeof(unsigned int),
817 .mode = 0644,
818 .proc_handler = proc_dointvec_jiffies,
819 },
820 #endif
821 [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP] = {
822 .procname = "nf_conntrack_icmp_timeout",
823 .maxlen = sizeof(unsigned int),
824 .mode = 0644,
825 .proc_handler = proc_dointvec_jiffies,
826 },
827 [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6] = {
828 .procname = "nf_conntrack_icmpv6_timeout",
829 .maxlen = sizeof(unsigned int),
830 .mode = 0644,
831 .proc_handler = proc_dointvec_jiffies,
832 },
833 #ifdef CONFIG_NF_CT_PROTO_SCTP
834 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED] = {
835 .procname = "nf_conntrack_sctp_timeout_closed",
836 .maxlen = sizeof(unsigned int),
837 .mode = 0644,
838 .proc_handler = proc_dointvec_jiffies,
839 },
840 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT] = {
841 .procname = "nf_conntrack_sctp_timeout_cookie_wait",
842 .maxlen = sizeof(unsigned int),
843 .mode = 0644,
844 .proc_handler = proc_dointvec_jiffies,
845 },
846 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED] = {
847 .procname = "nf_conntrack_sctp_timeout_cookie_echoed",
848 .maxlen = sizeof(unsigned int),
849 .mode = 0644,
850 .proc_handler = proc_dointvec_jiffies,
851 },
852 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED] = {
853 .procname = "nf_conntrack_sctp_timeout_established",
854 .maxlen = sizeof(unsigned int),
855 .mode = 0644,
856 .proc_handler = proc_dointvec_jiffies,
857 },
858 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT] = {
859 .procname = "nf_conntrack_sctp_timeout_shutdown_sent",
860 .maxlen = sizeof(unsigned int),
861 .mode = 0644,
862 .proc_handler = proc_dointvec_jiffies,
863 },
864 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD] = {
865 .procname = "nf_conntrack_sctp_timeout_shutdown_recd",
866 .maxlen = sizeof(unsigned int),
867 .mode = 0644,
868 .proc_handler = proc_dointvec_jiffies,
869 },
870 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT] = {
871 .procname = "nf_conntrack_sctp_timeout_shutdown_ack_sent",
872 .maxlen = sizeof(unsigned int),
873 .mode = 0644,
874 .proc_handler = proc_dointvec_jiffies,
875 },
876 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT] = {
877 .procname = "nf_conntrack_sctp_timeout_heartbeat_sent",
878 .maxlen = sizeof(unsigned int),
879 .mode = 0644,
880 .proc_handler = proc_dointvec_jiffies,
881 },
882 #endif
883 #ifdef CONFIG_NF_CT_PROTO_DCCP
884 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST] = {
885 .procname = "nf_conntrack_dccp_timeout_request",
886 .maxlen = sizeof(unsigned int),
887 .mode = 0644,
888 .proc_handler = proc_dointvec_jiffies,
889 },
890 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND] = {
891 .procname = "nf_conntrack_dccp_timeout_respond",
892 .maxlen = sizeof(unsigned int),
893 .mode = 0644,
894 .proc_handler = proc_dointvec_jiffies,
895 },
896 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN] = {
897 .procname = "nf_conntrack_dccp_timeout_partopen",
898 .maxlen = sizeof(unsigned int),
899 .mode = 0644,
900 .proc_handler = proc_dointvec_jiffies,
901 },
902 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN] = {
903 .procname = "nf_conntrack_dccp_timeout_open",
904 .maxlen = sizeof(unsigned int),
905 .mode = 0644,
906 .proc_handler = proc_dointvec_jiffies,
907 },
908 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ] = {
909 .procname = "nf_conntrack_dccp_timeout_closereq",
910 .maxlen = sizeof(unsigned int),
911 .mode = 0644,
912 .proc_handler = proc_dointvec_jiffies,
913 },
914 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING] = {
915 .procname = "nf_conntrack_dccp_timeout_closing",
916 .maxlen = sizeof(unsigned int),
917 .mode = 0644,
918 .proc_handler = proc_dointvec_jiffies,
919 },
920 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT] = {
921 .procname = "nf_conntrack_dccp_timeout_timewait",
922 .maxlen = sizeof(unsigned int),
923 .mode = 0644,
924 .proc_handler = proc_dointvec_jiffies,
925 },
926 [NF_SYSCTL_CT_PROTO_DCCP_LOOSE] = {
927 .procname = "nf_conntrack_dccp_loose",
928 .maxlen = sizeof(u8),
929 .mode = 0644,
930 .proc_handler = proc_dou8vec_minmax,
931 .extra1 = SYSCTL_ZERO,
932 .extra2 = SYSCTL_ONE,
933 },
934 #endif
935 #ifdef CONFIG_NF_CT_PROTO_GRE
936 [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE] = {
937 .procname = "nf_conntrack_gre_timeout",
938 .maxlen = sizeof(unsigned int),
939 .mode = 0644,
940 .proc_handler = proc_dointvec_jiffies,
941 },
942 [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM] = {
943 .procname = "nf_conntrack_gre_timeout_stream",
944 .maxlen = sizeof(unsigned int),
945 .mode = 0644,
946 .proc_handler = proc_dointvec_jiffies,
947 },
948 #endif
949 {}
950 };
951
952 static struct ctl_table nf_ct_netfilter_table[] = {
953 {
954 .procname = "nf_conntrack_max",
955 .data = &nf_conntrack_max,
956 .maxlen = sizeof(int),
957 .mode = 0644,
958 .proc_handler = proc_dointvec_minmax,
959 .extra1 = SYSCTL_ZERO,
960 .extra2 = SYSCTL_INT_MAX,
961 },
962 { }
963 };
964
nf_conntrack_standalone_init_tcp_sysctl(struct net * net,struct ctl_table * table)965 static void nf_conntrack_standalone_init_tcp_sysctl(struct net *net,
966 struct ctl_table *table)
967 {
968 struct nf_tcp_net *tn = nf_tcp_pernet(net);
969
970 #define XASSIGN(XNAME, tn) \
971 table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ ## XNAME].data = \
972 &(tn)->timeouts[TCP_CONNTRACK_ ## XNAME]
973
974 XASSIGN(SYN_SENT, tn);
975 XASSIGN(SYN_RECV, tn);
976 XASSIGN(ESTABLISHED, tn);
977 XASSIGN(FIN_WAIT, tn);
978 XASSIGN(CLOSE_WAIT, tn);
979 XASSIGN(LAST_ACK, tn);
980 XASSIGN(TIME_WAIT, tn);
981 XASSIGN(CLOSE, tn);
982 XASSIGN(RETRANS, tn);
983 XASSIGN(UNACK, tn);
984 #undef XASSIGN
985 #define XASSIGN(XNAME, rval) \
986 table[NF_SYSCTL_CT_PROTO_TCP_ ## XNAME].data = (rval)
987
988 XASSIGN(LOOSE, &tn->tcp_loose);
989 XASSIGN(LIBERAL, &tn->tcp_be_liberal);
990 XASSIGN(MAX_RETRANS, &tn->tcp_max_retrans);
991 XASSIGN(IGNORE_INVALID_RST, &tn->tcp_ignore_invalid_rst);
992 #undef XASSIGN
993
994 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
995 table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD].data = &tn->offload_timeout;
996 #endif
997
998 }
999
nf_conntrack_standalone_init_sctp_sysctl(struct net * net,struct ctl_table * table)1000 static void nf_conntrack_standalone_init_sctp_sysctl(struct net *net,
1001 struct ctl_table *table)
1002 {
1003 #ifdef CONFIG_NF_CT_PROTO_SCTP
1004 struct nf_sctp_net *sn = nf_sctp_pernet(net);
1005
1006 #define XASSIGN(XNAME, sn) \
1007 table[NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ ## XNAME].data = \
1008 &(sn)->timeouts[SCTP_CONNTRACK_ ## XNAME]
1009
1010 XASSIGN(CLOSED, sn);
1011 XASSIGN(COOKIE_WAIT, sn);
1012 XASSIGN(COOKIE_ECHOED, sn);
1013 XASSIGN(ESTABLISHED, sn);
1014 XASSIGN(SHUTDOWN_SENT, sn);
1015 XASSIGN(SHUTDOWN_RECD, sn);
1016 XASSIGN(SHUTDOWN_ACK_SENT, sn);
1017 XASSIGN(HEARTBEAT_SENT, sn);
1018 #undef XASSIGN
1019 #endif
1020 }
1021
nf_conntrack_standalone_init_dccp_sysctl(struct net * net,struct ctl_table * table)1022 static void nf_conntrack_standalone_init_dccp_sysctl(struct net *net,
1023 struct ctl_table *table)
1024 {
1025 #ifdef CONFIG_NF_CT_PROTO_DCCP
1026 struct nf_dccp_net *dn = nf_dccp_pernet(net);
1027
1028 #define XASSIGN(XNAME, dn) \
1029 table[NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_ ## XNAME].data = \
1030 &(dn)->dccp_timeout[CT_DCCP_ ## XNAME]
1031
1032 XASSIGN(REQUEST, dn);
1033 XASSIGN(RESPOND, dn);
1034 XASSIGN(PARTOPEN, dn);
1035 XASSIGN(OPEN, dn);
1036 XASSIGN(CLOSEREQ, dn);
1037 XASSIGN(CLOSING, dn);
1038 XASSIGN(TIMEWAIT, dn);
1039 #undef XASSIGN
1040
1041 table[NF_SYSCTL_CT_PROTO_DCCP_LOOSE].data = &dn->dccp_loose;
1042 #endif
1043 }
1044
nf_conntrack_standalone_init_gre_sysctl(struct net * net,struct ctl_table * table)1045 static void nf_conntrack_standalone_init_gre_sysctl(struct net *net,
1046 struct ctl_table *table)
1047 {
1048 #ifdef CONFIG_NF_CT_PROTO_GRE
1049 struct nf_gre_net *gn = nf_gre_pernet(net);
1050
1051 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE].data = &gn->timeouts[GRE_CT_UNREPLIED];
1052 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM].data = &gn->timeouts[GRE_CT_REPLIED];
1053 #endif
1054 }
1055
nf_conntrack_standalone_init_sysctl(struct net * net)1056 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1057 {
1058 struct nf_conntrack_net *cnet = nf_ct_pernet(net);
1059 struct nf_udp_net *un = nf_udp_pernet(net);
1060 struct ctl_table *table;
1061
1062 BUILD_BUG_ON(ARRAY_SIZE(nf_ct_sysctl_table) != NF_SYSCTL_CT_LAST_SYSCTL);
1063
1064 table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table),
1065 GFP_KERNEL);
1066 if (!table)
1067 return -ENOMEM;
1068
1069 table[NF_SYSCTL_CT_COUNT].data = &cnet->count;
1070 table[NF_SYSCTL_CT_CHECKSUM].data = &net->ct.sysctl_checksum;
1071 table[NF_SYSCTL_CT_LOG_INVALID].data = &net->ct.sysctl_log_invalid;
1072 table[NF_SYSCTL_CT_ACCT].data = &net->ct.sysctl_acct;
1073 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1074 table[NF_SYSCTL_CT_EVENTS].data = &net->ct.sysctl_events;
1075 #endif
1076 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
1077 table[NF_SYSCTL_CT_TIMESTAMP].data = &net->ct.sysctl_tstamp;
1078 #endif
1079 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC].data = &nf_generic_pernet(net)->timeout;
1080 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP].data = &nf_icmp_pernet(net)->timeout;
1081 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6].data = &nf_icmpv6_pernet(net)->timeout;
1082 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP].data = &un->timeouts[UDP_CT_UNREPLIED];
1083 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM].data = &un->timeouts[UDP_CT_REPLIED];
1084 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
1085 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD].data = &un->offload_timeout;
1086 #endif
1087
1088 nf_conntrack_standalone_init_tcp_sysctl(net, table);
1089 nf_conntrack_standalone_init_sctp_sysctl(net, table);
1090 nf_conntrack_standalone_init_dccp_sysctl(net, table);
1091 nf_conntrack_standalone_init_gre_sysctl(net, table);
1092
1093 /* Don't allow non-init_net ns to alter global sysctls */
1094 if (!net_eq(&init_net, net)) {
1095 table[NF_SYSCTL_CT_MAX].mode = 0444;
1096 table[NF_SYSCTL_CT_EXPECT_MAX].mode = 0444;
1097 table[NF_SYSCTL_CT_BUCKETS].mode = 0444;
1098 }
1099
1100 cnet->sysctl_header = register_net_sysctl_sz(net, "net/netfilter",
1101 table,
1102 ARRAY_SIZE(nf_ct_sysctl_table));
1103 if (!cnet->sysctl_header)
1104 goto out_unregister_netfilter;
1105
1106 return 0;
1107
1108 out_unregister_netfilter:
1109 kfree(table);
1110 return -ENOMEM;
1111 }
1112
nf_conntrack_standalone_fini_sysctl(struct net * net)1113 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1114 {
1115 struct nf_conntrack_net *cnet = nf_ct_pernet(net);
1116 struct ctl_table *table;
1117
1118 table = cnet->sysctl_header->ctl_table_arg;
1119 unregister_net_sysctl_table(cnet->sysctl_header);
1120 kfree(table);
1121 }
1122 #else
nf_conntrack_standalone_init_sysctl(struct net * net)1123 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1124 {
1125 return 0;
1126 }
1127
nf_conntrack_standalone_fini_sysctl(struct net * net)1128 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1129 {
1130 }
1131 #endif /* CONFIG_SYSCTL */
1132
nf_conntrack_fini_net(struct net * net)1133 static void nf_conntrack_fini_net(struct net *net)
1134 {
1135 if (enable_hooks)
1136 nf_ct_netns_put(net, NFPROTO_INET);
1137
1138 nf_conntrack_standalone_fini_proc(net);
1139 nf_conntrack_standalone_fini_sysctl(net);
1140 }
1141
nf_conntrack_pernet_init(struct net * net)1142 static int nf_conntrack_pernet_init(struct net *net)
1143 {
1144 int ret;
1145
1146 net->ct.sysctl_checksum = 1;
1147
1148 ret = nf_conntrack_standalone_init_sysctl(net);
1149 if (ret < 0)
1150 return ret;
1151
1152 ret = nf_conntrack_standalone_init_proc(net);
1153 if (ret < 0)
1154 goto out_proc;
1155
1156 ret = nf_conntrack_init_net(net);
1157 if (ret < 0)
1158 goto out_init_net;
1159
1160 if (enable_hooks) {
1161 ret = nf_ct_netns_get(net, NFPROTO_INET);
1162 if (ret < 0)
1163 goto out_hooks;
1164 }
1165
1166 return 0;
1167
1168 out_hooks:
1169 nf_conntrack_cleanup_net(net);
1170 out_init_net:
1171 nf_conntrack_standalone_fini_proc(net);
1172 out_proc:
1173 nf_conntrack_standalone_fini_sysctl(net);
1174 return ret;
1175 }
1176
nf_conntrack_pernet_exit(struct list_head * net_exit_list)1177 static void nf_conntrack_pernet_exit(struct list_head *net_exit_list)
1178 {
1179 struct net *net;
1180
1181 list_for_each_entry(net, net_exit_list, exit_list)
1182 nf_conntrack_fini_net(net);
1183
1184 nf_conntrack_cleanup_net_list(net_exit_list);
1185 }
1186
1187 static struct pernet_operations nf_conntrack_net_ops = {
1188 .init = nf_conntrack_pernet_init,
1189 .exit_batch = nf_conntrack_pernet_exit,
1190 .id = &nf_conntrack_net_id,
1191 .size = sizeof(struct nf_conntrack_net),
1192 };
1193
nf_conntrack_standalone_init(void)1194 static int __init nf_conntrack_standalone_init(void)
1195 {
1196 int ret = nf_conntrack_init_start();
1197 if (ret < 0)
1198 goto out_start;
1199
1200 BUILD_BUG_ON(NFCT_INFOMASK <= IP_CT_NUMBER);
1201
1202 #ifdef CONFIG_SYSCTL
1203 nf_ct_netfilter_header =
1204 register_net_sysctl(&init_net, "net", nf_ct_netfilter_table);
1205 if (!nf_ct_netfilter_header) {
1206 pr_err("nf_conntrack: can't register to sysctl.\n");
1207 ret = -ENOMEM;
1208 goto out_sysctl;
1209 }
1210
1211 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
1212 #endif
1213
1214 nf_conntrack_init_end();
1215
1216 ret = register_pernet_subsys(&nf_conntrack_net_ops);
1217 if (ret < 0)
1218 goto out_pernet;
1219
1220 return 0;
1221
1222 out_pernet:
1223 #ifdef CONFIG_SYSCTL
1224 unregister_net_sysctl_table(nf_ct_netfilter_header);
1225 out_sysctl:
1226 #endif
1227 nf_conntrack_cleanup_end();
1228 out_start:
1229 return ret;
1230 }
1231
nf_conntrack_standalone_fini(void)1232 static void __exit nf_conntrack_standalone_fini(void)
1233 {
1234 nf_conntrack_cleanup_start();
1235 unregister_pernet_subsys(&nf_conntrack_net_ops);
1236 #ifdef CONFIG_SYSCTL
1237 unregister_net_sysctl_table(nf_ct_netfilter_header);
1238 #endif
1239 nf_conntrack_cleanup_end();
1240 }
1241
1242 module_init(nf_conntrack_standalone_init);
1243 module_exit(nf_conntrack_standalone_fini);
1244