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 #ifdef CONFIG_LWTUNNEL
26 #include <net/netfilter/nf_hooks_lwtunnel.h>
27 #endif
28 #include <linux/rculist_nulls.h>
29
30 static bool enable_hooks __read_mostly;
31 MODULE_PARM_DESC(enable_hooks, "Always enable conntrack hooks");
32 module_param(enable_hooks, bool, 0000);
33
34 unsigned int nf_conntrack_net_id __read_mostly;
35
36 #ifdef CONFIG_NF_CONNTRACK_PROCFS
37 void
print_tuple(struct seq_file * s,const struct nf_conntrack_tuple * tuple,const struct nf_conntrack_l4proto * l4proto)38 print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
39 const struct nf_conntrack_l4proto *l4proto)
40 {
41 switch (tuple->src.l3num) {
42 case NFPROTO_IPV4:
43 seq_printf(s, "src=%pI4 dst=%pI4 ",
44 &tuple->src.u3.ip, &tuple->dst.u3.ip);
45 break;
46 case NFPROTO_IPV6:
47 seq_printf(s, "src=%pI6 dst=%pI6 ",
48 tuple->src.u3.ip6, tuple->dst.u3.ip6);
49 break;
50 default:
51 break;
52 }
53
54 switch (l4proto->l4proto) {
55 case IPPROTO_ICMP:
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));
60 break;
61 case IPPROTO_TCP:
62 seq_printf(s, "sport=%hu dport=%hu ",
63 ntohs(tuple->src.u.tcp.port),
64 ntohs(tuple->dst.u.tcp.port));
65 break;
66 case IPPROTO_UDPLITE:
67 case IPPROTO_UDP:
68 seq_printf(s, "sport=%hu dport=%hu ",
69 ntohs(tuple->src.u.udp.port),
70 ntohs(tuple->dst.u.udp.port));
71
72 break;
73 case IPPROTO_DCCP:
74 seq_printf(s, "sport=%hu dport=%hu ",
75 ntohs(tuple->src.u.dccp.port),
76 ntohs(tuple->dst.u.dccp.port));
77 break;
78 case IPPROTO_SCTP:
79 seq_printf(s, "sport=%hu dport=%hu ",
80 ntohs(tuple->src.u.sctp.port),
81 ntohs(tuple->dst.u.sctp.port));
82 break;
83 case IPPROTO_ICMPV6:
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));
88 break;
89 case IPPROTO_GRE:
90 seq_printf(s, "srckey=0x%x dstkey=0x%x ",
91 ntohs(tuple->src.u.gre.key),
92 ntohs(tuple->dst.u.gre.key));
93 break;
94 default:
95 break;
96 }
97 }
98 EXPORT_SYMBOL_GPL(print_tuple);
99
100 struct ct_iter_state {
101 struct seq_net_private p;
102 struct hlist_nulls_head *hash;
103 unsigned int htable_size;
104 unsigned int bucket;
105 u_int64_t time_now;
106 };
107
ct_get_first(struct seq_file * seq)108 static struct hlist_nulls_node *ct_get_first(struct seq_file *seq)
109 {
110 struct ct_iter_state *st = seq->private;
111 struct hlist_nulls_node *n;
112
113 for (st->bucket = 0;
114 st->bucket < st->htable_size;
115 st->bucket++) {
116 n = rcu_dereference(
117 hlist_nulls_first_rcu(&st->hash[st->bucket]));
118 if (!is_a_nulls(n))
119 return n;
120 }
121 return NULL;
122 }
123
ct_get_next(struct seq_file * seq,struct hlist_nulls_node * head)124 static struct hlist_nulls_node *ct_get_next(struct seq_file *seq,
125 struct hlist_nulls_node *head)
126 {
127 struct ct_iter_state *st = seq->private;
128
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)
133 return NULL;
134 }
135 head = rcu_dereference(
136 hlist_nulls_first_rcu(&st->hash[st->bucket]));
137 }
138 return head;
139 }
140
ct_get_idx(struct seq_file * seq,loff_t pos)141 static struct hlist_nulls_node *ct_get_idx(struct seq_file *seq, loff_t pos)
142 {
143 struct hlist_nulls_node *head = ct_get_first(seq);
144
145 if (head)
146 while (pos && (head = ct_get_next(seq, head)))
147 pos--;
148 return pos ? NULL : head;
149 }
150
ct_seq_start(struct seq_file * seq,loff_t * pos)151 static void *ct_seq_start(struct seq_file *seq, loff_t *pos)
152 __acquires(RCU)
153 {
154 struct ct_iter_state *st = seq->private;
155
156 st->time_now = ktime_get_real_ns();
157 rcu_read_lock();
158
159 nf_conntrack_get_ht(&st->hash, &st->htable_size);
160 return ct_get_idx(seq, *pos);
161 }
162
ct_seq_next(struct seq_file * s,void * v,loff_t * pos)163 static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos)
164 {
165 (*pos)++;
166 return ct_get_next(s, v);
167 }
168
ct_seq_stop(struct seq_file * s,void * v)169 static void ct_seq_stop(struct seq_file *s, void *v)
170 __releases(RCU)
171 {
172 rcu_read_unlock();
173 }
174
175 #ifdef CONFIG_NF_CONNTRACK_SECMARK
ct_show_secctx(struct seq_file * s,const struct nf_conn * ct)176 static void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
177 {
178 int ret;
179 u32 len;
180 char *secctx;
181
182 ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
183 if (ret)
184 return;
185
186 seq_printf(s, "secctx=%s ", secctx);
187
188 security_release_secctx(secctx, len);
189 }
190 #else
ct_show_secctx(struct seq_file * s,const struct nf_conn * ct)191 static inline void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
192 {
193 }
194 #endif
195
196 #ifdef CONFIG_NF_CONNTRACK_ZONES
ct_show_zone(struct seq_file * s,const struct nf_conn * ct,int dir)197 static void ct_show_zone(struct seq_file *s, const struct nf_conn *ct,
198 int dir)
199 {
200 const struct nf_conntrack_zone *zone = nf_ct_zone(ct);
201
202 if (zone->dir != dir)
203 return;
204 switch (zone->dir) {
205 case NF_CT_DEFAULT_ZONE_DIR:
206 seq_printf(s, "zone=%u ", zone->id);
207 break;
208 case NF_CT_ZONE_DIR_ORIG:
209 seq_printf(s, "zone-orig=%u ", zone->id);
210 break;
211 case NF_CT_ZONE_DIR_REPL:
212 seq_printf(s, "zone-reply=%u ", zone->id);
213 break;
214 default:
215 break;
216 }
217 }
218 #else
ct_show_zone(struct seq_file * s,const struct nf_conn * ct,int dir)219 static inline void ct_show_zone(struct seq_file *s, const struct nf_conn *ct,
220 int dir)
221 {
222 }
223 #endif
224
225 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
ct_show_delta_time(struct seq_file * s,const struct nf_conn * ct)226 static void ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct)
227 {
228 struct ct_iter_state *st = s->private;
229 struct nf_conn_tstamp *tstamp;
230 s64 delta_time;
231
232 tstamp = nf_conn_tstamp_find(ct);
233 if (tstamp) {
234 delta_time = st->time_now - tstamp->start;
235 if (delta_time > 0)
236 delta_time = div_s64(delta_time, NSEC_PER_SEC);
237 else
238 delta_time = 0;
239
240 seq_printf(s, "delta-time=%llu ",
241 (unsigned long long)delta_time);
242 }
243 return;
244 }
245 #else
246 static inline void
ct_show_delta_time(struct seq_file * s,const struct nf_conn * ct)247 ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct)
248 {
249 }
250 #endif
251
l3proto_name(u16 proto)252 static const char* l3proto_name(u16 proto)
253 {
254 switch (proto) {
255 case AF_INET: return "ipv4";
256 case AF_INET6: return "ipv6";
257 }
258
259 return "unknown";
260 }
261
l4proto_name(u16 proto)262 static const char* l4proto_name(u16 proto)
263 {
264 switch (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";
273 }
274
275 return "unknown";
276 }
277
278 static void
seq_print_acct(struct seq_file * s,const struct nf_conn * ct,int dir)279 seq_print_acct(struct seq_file *s, const struct nf_conn *ct, int dir)
280 {
281 struct nf_conn_acct *acct;
282 struct nf_conn_counter *counter;
283
284 acct = nf_conn_acct_find(ct);
285 if (!acct)
286 return;
287
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));
292 }
293
294 /* return 0 on success, 1 in case of error */
ct_seq_show(struct seq_file * s,void * v)295 static int ct_seq_show(struct seq_file *s, void *v)
296 {
297 struct nf_conntrack_tuple_hash *hash = v;
298 struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
299 const struct nf_conntrack_l4proto *l4proto;
300 struct net *net = seq_file_net(s);
301 int ret = 0;
302
303 WARN_ON(!ct);
304 if (unlikely(!refcount_inc_not_zero(&ct->ct_general.use)))
305 return 0;
306
307 /* load ->status after refcount increase */
308 smp_acquire__after_ctrl_dep();
309
310 if (nf_ct_should_gc(ct)) {
311 nf_ct_kill(ct);
312 goto release;
313 }
314
315 /* we only want to print DIR_ORIGINAL */
316 if (NF_CT_DIRECTION(hash))
317 goto release;
318
319 if (!net_eq(nf_ct_net(ct), net))
320 goto release;
321
322 l4proto = nf_ct_l4proto_find(nf_ct_protonum(ct));
323
324 ret = -ENOSPC;
325 seq_printf(s, "%-8s %u %-8s %u ",
326 l3proto_name(nf_ct_l3num(ct)), nf_ct_l3num(ct),
327 l4proto_name(l4proto->l4proto), nf_ct_protonum(ct));
328
329 if (!test_bit(IPS_OFFLOAD_BIT, &ct->status))
330 seq_printf(s, "%ld ", nf_ct_expires(ct) / HZ);
331
332 if (l4proto->print_conntrack)
333 l4proto->print_conntrack(s, ct);
334
335 print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
336 l4proto);
337
338 ct_show_zone(s, ct, NF_CT_ZONE_DIR_ORIG);
339
340 if (seq_has_overflowed(s))
341 goto release;
342
343 seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL);
344
345 if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
346 seq_puts(s, "[UNREPLIED] ");
347
348 print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, l4proto);
349
350 ct_show_zone(s, ct, NF_CT_ZONE_DIR_REPL);
351
352 seq_print_acct(s, ct, IP_CT_DIR_REPLY);
353
354 if (test_bit(IPS_HW_OFFLOAD_BIT, &ct->status))
355 seq_puts(s, "[HW_OFFLOAD] ");
356 else if (test_bit(IPS_OFFLOAD_BIT, &ct->status))
357 seq_puts(s, "[OFFLOAD] ");
358 else if (test_bit(IPS_ASSURED_BIT, &ct->status))
359 seq_puts(s, "[ASSURED] ");
360
361 if (seq_has_overflowed(s))
362 goto release;
363
364 #if defined(CONFIG_NF_CONNTRACK_MARK)
365 seq_printf(s, "mark=%u ", READ_ONCE(ct->mark));
366 #endif
367
368 ct_show_secctx(s, ct);
369 ct_show_zone(s, ct, NF_CT_DEFAULT_ZONE_DIR);
370 ct_show_delta_time(s, ct);
371
372 seq_printf(s, "use=%u\n", refcount_read(&ct->ct_general.use));
373
374 if (seq_has_overflowed(s))
375 goto release;
376
377 ret = 0;
378 release:
379 nf_ct_put(ct);
380 return ret;
381 }
382
383 static const struct seq_operations ct_seq_ops = {
384 .start = ct_seq_start,
385 .next = ct_seq_next,
386 .stop = ct_seq_stop,
387 .show = ct_seq_show
388 };
389
ct_cpu_seq_start(struct seq_file * seq,loff_t * pos)390 static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
391 {
392 struct net *net = seq_file_net(seq);
393 int cpu;
394
395 if (*pos == 0)
396 return SEQ_START_TOKEN;
397
398 for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) {
399 if (!cpu_possible(cpu))
400 continue;
401 *pos = cpu + 1;
402 return per_cpu_ptr(net->ct.stat, cpu);
403 }
404
405 return NULL;
406 }
407
ct_cpu_seq_next(struct seq_file * seq,void * v,loff_t * pos)408 static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
409 {
410 struct net *net = seq_file_net(seq);
411 int cpu;
412
413 for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) {
414 if (!cpu_possible(cpu))
415 continue;
416 *pos = cpu + 1;
417 return per_cpu_ptr(net->ct.stat, cpu);
418 }
419 (*pos)++;
420 return NULL;
421 }
422
ct_cpu_seq_stop(struct seq_file * seq,void * v)423 static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
424 {
425 }
426
ct_cpu_seq_show(struct seq_file * seq,void * v)427 static int ct_cpu_seq_show(struct seq_file *seq, void *v)
428 {
429 struct net *net = seq_file_net(seq);
430 const struct ip_conntrack_stat *st = v;
431 unsigned int nr_conntracks;
432
433 if (v == SEQ_START_TOKEN) {
434 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");
435 return 0;
436 }
437
438 nr_conntracks = nf_conntrack_count(net);
439
440 seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
441 "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n",
442 nr_conntracks,
443 st->clash_resolve,
444 st->found,
445 0,
446 st->invalid,
447 0,
448 0,
449 st->chaintoolong,
450 st->insert,
451 st->insert_failed,
452 st->drop,
453 st->early_drop,
454 st->error,
455
456 st->expect_new,
457 st->expect_create,
458 st->expect_delete,
459 st->search_restart
460 );
461 return 0;
462 }
463
464 static const struct seq_operations ct_cpu_seq_ops = {
465 .start = ct_cpu_seq_start,
466 .next = ct_cpu_seq_next,
467 .stop = ct_cpu_seq_stop,
468 .show = ct_cpu_seq_show,
469 };
470
nf_conntrack_standalone_init_proc(struct net * net)471 static int nf_conntrack_standalone_init_proc(struct net *net)
472 {
473 struct proc_dir_entry *pde;
474 kuid_t root_uid;
475 kgid_t root_gid;
476
477 pde = proc_create_net("nf_conntrack", 0440, net->proc_net, &ct_seq_ops,
478 sizeof(struct ct_iter_state));
479 if (!pde)
480 goto out_nf_conntrack;
481
482 root_uid = make_kuid(net->user_ns, 0);
483 root_gid = make_kgid(net->user_ns, 0);
484 if (uid_valid(root_uid) && gid_valid(root_gid))
485 proc_set_user(pde, root_uid, root_gid);
486
487 pde = proc_create_net("nf_conntrack", 0444, net->proc_net_stat,
488 &ct_cpu_seq_ops, sizeof(struct seq_net_private));
489 if (!pde)
490 goto out_stat_nf_conntrack;
491 return 0;
492
493 out_stat_nf_conntrack:
494 remove_proc_entry("nf_conntrack", net->proc_net);
495 out_nf_conntrack:
496 return -ENOMEM;
497 }
498
nf_conntrack_standalone_fini_proc(struct net * net)499 static void nf_conntrack_standalone_fini_proc(struct net *net)
500 {
501 remove_proc_entry("nf_conntrack", net->proc_net_stat);
502 remove_proc_entry("nf_conntrack", net->proc_net);
503 }
504 #else
nf_conntrack_standalone_init_proc(struct net * net)505 static int nf_conntrack_standalone_init_proc(struct net *net)
506 {
507 return 0;
508 }
509
nf_conntrack_standalone_fini_proc(struct net * net)510 static void nf_conntrack_standalone_fini_proc(struct net *net)
511 {
512 }
513 #endif /* CONFIG_NF_CONNTRACK_PROCFS */
514
nf_conntrack_count(const struct net * net)515 u32 nf_conntrack_count(const struct net *net)
516 {
517 const struct nf_conntrack_net *cnet = nf_ct_pernet(net);
518
519 return atomic_read(&cnet->count);
520 }
521 EXPORT_SYMBOL_GPL(nf_conntrack_count);
522
523 /* Sysctl support */
524
525 #ifdef CONFIG_SYSCTL
526 /* size the user *wants to set */
527 static unsigned int nf_conntrack_htable_size_user __read_mostly;
528
529 static int
nf_conntrack_hash_sysctl(struct ctl_table * table,int write,void * buffer,size_t * lenp,loff_t * ppos)530 nf_conntrack_hash_sysctl(struct ctl_table *table, int write,
531 void *buffer, size_t *lenp, loff_t *ppos)
532 {
533 int ret;
534
535 /* module_param hashsize could have changed value */
536 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
537
538 ret = proc_dointvec(table, write, buffer, lenp, ppos);
539 if (ret < 0 || !write)
540 return ret;
541
542 /* update ret, we might not be able to satisfy request */
543 ret = nf_conntrack_hash_resize(nf_conntrack_htable_size_user);
544
545 /* update it to the actual value used by conntrack */
546 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
547 return ret;
548 }
549
550 static struct ctl_table_header *nf_ct_netfilter_header;
551
552 enum nf_ct_sysctl_index {
553 NF_SYSCTL_CT_MAX,
554 NF_SYSCTL_CT_COUNT,
555 NF_SYSCTL_CT_BUCKETS,
556 NF_SYSCTL_CT_CHECKSUM,
557 NF_SYSCTL_CT_LOG_INVALID,
558 NF_SYSCTL_CT_EXPECT_MAX,
559 NF_SYSCTL_CT_ACCT,
560 #ifdef CONFIG_NF_CONNTRACK_EVENTS
561 NF_SYSCTL_CT_EVENTS,
562 #endif
563 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
564 NF_SYSCTL_CT_TIMESTAMP,
565 #endif
566 NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC,
567 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT,
568 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV,
569 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED,
570 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT,
571 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT,
572 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK,
573 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT,
574 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE,
575 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS,
576 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK,
577 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
578 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD,
579 #endif
580 NF_SYSCTL_CT_PROTO_TCP_LOOSE,
581 NF_SYSCTL_CT_PROTO_TCP_LIBERAL,
582 NF_SYSCTL_CT_PROTO_TCP_IGNORE_INVALID_RST,
583 NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS,
584 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP,
585 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM,
586 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
587 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD,
588 #endif
589 NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP,
590 NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6,
591 #ifdef CONFIG_NF_CT_PROTO_SCTP
592 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED,
593 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT,
594 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED,
595 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED,
596 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT,
597 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD,
598 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT,
599 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT,
600 #endif
601 #ifdef CONFIG_NF_CT_PROTO_DCCP
602 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST,
603 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND,
604 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN,
605 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN,
606 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ,
607 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING,
608 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT,
609 NF_SYSCTL_CT_PROTO_DCCP_LOOSE,
610 #endif
611 #ifdef CONFIG_NF_CT_PROTO_GRE
612 NF_SYSCTL_CT_PROTO_TIMEOUT_GRE,
613 NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM,
614 #endif
615 #ifdef CONFIG_LWTUNNEL
616 NF_SYSCTL_CT_LWTUNNEL,
617 #endif
618
619 NF_SYSCTL_CT_LAST_SYSCTL,
620 };
621
622 static struct ctl_table nf_ct_sysctl_table[] = {
623 [NF_SYSCTL_CT_MAX] = {
624 .procname = "nf_conntrack_max",
625 .data = &nf_conntrack_max,
626 .maxlen = sizeof(int),
627 .mode = 0644,
628 .proc_handler = proc_dointvec,
629 },
630 [NF_SYSCTL_CT_COUNT] = {
631 .procname = "nf_conntrack_count",
632 .maxlen = sizeof(int),
633 .mode = 0444,
634 .proc_handler = proc_dointvec,
635 },
636 [NF_SYSCTL_CT_BUCKETS] = {
637 .procname = "nf_conntrack_buckets",
638 .data = &nf_conntrack_htable_size_user,
639 .maxlen = sizeof(unsigned int),
640 .mode = 0644,
641 .proc_handler = nf_conntrack_hash_sysctl,
642 },
643 [NF_SYSCTL_CT_CHECKSUM] = {
644 .procname = "nf_conntrack_checksum",
645 .data = &init_net.ct.sysctl_checksum,
646 .maxlen = sizeof(u8),
647 .mode = 0644,
648 .proc_handler = proc_dou8vec_minmax,
649 .extra1 = SYSCTL_ZERO,
650 .extra2 = SYSCTL_ONE,
651 },
652 [NF_SYSCTL_CT_LOG_INVALID] = {
653 .procname = "nf_conntrack_log_invalid",
654 .data = &init_net.ct.sysctl_log_invalid,
655 .maxlen = sizeof(u8),
656 .mode = 0644,
657 .proc_handler = proc_dou8vec_minmax,
658 },
659 [NF_SYSCTL_CT_EXPECT_MAX] = {
660 .procname = "nf_conntrack_expect_max",
661 .data = &nf_ct_expect_max,
662 .maxlen = sizeof(int),
663 .mode = 0644,
664 .proc_handler = proc_dointvec,
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 #ifdef CONFIG_LWTUNNEL
950 [NF_SYSCTL_CT_LWTUNNEL] = {
951 .procname = "nf_hooks_lwtunnel",
952 .data = NULL,
953 .maxlen = sizeof(int),
954 .mode = 0644,
955 .proc_handler = nf_hooks_lwtunnel_sysctl_handler,
956 },
957 #endif
958 };
959
960 static struct ctl_table nf_ct_netfilter_table[] = {
961 {
962 .procname = "nf_conntrack_max",
963 .data = &nf_conntrack_max,
964 .maxlen = sizeof(int),
965 .mode = 0644,
966 .proc_handler = proc_dointvec,
967 },
968 };
969
nf_conntrack_standalone_init_tcp_sysctl(struct net * net,struct ctl_table * table)970 static void nf_conntrack_standalone_init_tcp_sysctl(struct net *net,
971 struct ctl_table *table)
972 {
973 struct nf_tcp_net *tn = nf_tcp_pernet(net);
974
975 #define XASSIGN(XNAME, tn) \
976 table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ ## XNAME].data = \
977 &(tn)->timeouts[TCP_CONNTRACK_ ## XNAME]
978
979 XASSIGN(SYN_SENT, tn);
980 XASSIGN(SYN_RECV, tn);
981 XASSIGN(ESTABLISHED, tn);
982 XASSIGN(FIN_WAIT, tn);
983 XASSIGN(CLOSE_WAIT, tn);
984 XASSIGN(LAST_ACK, tn);
985 XASSIGN(TIME_WAIT, tn);
986 XASSIGN(CLOSE, tn);
987 XASSIGN(RETRANS, tn);
988 XASSIGN(UNACK, tn);
989 #undef XASSIGN
990 #define XASSIGN(XNAME, rval) \
991 table[NF_SYSCTL_CT_PROTO_TCP_ ## XNAME].data = (rval)
992
993 XASSIGN(LOOSE, &tn->tcp_loose);
994 XASSIGN(LIBERAL, &tn->tcp_be_liberal);
995 XASSIGN(MAX_RETRANS, &tn->tcp_max_retrans);
996 XASSIGN(IGNORE_INVALID_RST, &tn->tcp_ignore_invalid_rst);
997 #undef XASSIGN
998
999 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
1000 table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD].data = &tn->offload_timeout;
1001 #endif
1002
1003 }
1004
nf_conntrack_standalone_init_sctp_sysctl(struct net * net,struct ctl_table * table)1005 static void nf_conntrack_standalone_init_sctp_sysctl(struct net *net,
1006 struct ctl_table *table)
1007 {
1008 #ifdef CONFIG_NF_CT_PROTO_SCTP
1009 struct nf_sctp_net *sn = nf_sctp_pernet(net);
1010
1011 #define XASSIGN(XNAME, sn) \
1012 table[NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ ## XNAME].data = \
1013 &(sn)->timeouts[SCTP_CONNTRACK_ ## XNAME]
1014
1015 XASSIGN(CLOSED, sn);
1016 XASSIGN(COOKIE_WAIT, sn);
1017 XASSIGN(COOKIE_ECHOED, sn);
1018 XASSIGN(ESTABLISHED, sn);
1019 XASSIGN(SHUTDOWN_SENT, sn);
1020 XASSIGN(SHUTDOWN_RECD, sn);
1021 XASSIGN(SHUTDOWN_ACK_SENT, sn);
1022 XASSIGN(HEARTBEAT_SENT, sn);
1023 #undef XASSIGN
1024 #endif
1025 }
1026
nf_conntrack_standalone_init_dccp_sysctl(struct net * net,struct ctl_table * table)1027 static void nf_conntrack_standalone_init_dccp_sysctl(struct net *net,
1028 struct ctl_table *table)
1029 {
1030 #ifdef CONFIG_NF_CT_PROTO_DCCP
1031 struct nf_dccp_net *dn = nf_dccp_pernet(net);
1032
1033 #define XASSIGN(XNAME, dn) \
1034 table[NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_ ## XNAME].data = \
1035 &(dn)->dccp_timeout[CT_DCCP_ ## XNAME]
1036
1037 XASSIGN(REQUEST, dn);
1038 XASSIGN(RESPOND, dn);
1039 XASSIGN(PARTOPEN, dn);
1040 XASSIGN(OPEN, dn);
1041 XASSIGN(CLOSEREQ, dn);
1042 XASSIGN(CLOSING, dn);
1043 XASSIGN(TIMEWAIT, dn);
1044 #undef XASSIGN
1045
1046 table[NF_SYSCTL_CT_PROTO_DCCP_LOOSE].data = &dn->dccp_loose;
1047 #endif
1048 }
1049
nf_conntrack_standalone_init_gre_sysctl(struct net * net,struct ctl_table * table)1050 static void nf_conntrack_standalone_init_gre_sysctl(struct net *net,
1051 struct ctl_table *table)
1052 {
1053 #ifdef CONFIG_NF_CT_PROTO_GRE
1054 struct nf_gre_net *gn = nf_gre_pernet(net);
1055
1056 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE].data = &gn->timeouts[GRE_CT_UNREPLIED];
1057 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM].data = &gn->timeouts[GRE_CT_REPLIED];
1058 #endif
1059 }
1060
nf_conntrack_standalone_init_sysctl(struct net * net)1061 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1062 {
1063 struct nf_conntrack_net *cnet = nf_ct_pernet(net);
1064 struct nf_udp_net *un = nf_udp_pernet(net);
1065 struct ctl_table *table;
1066
1067 BUILD_BUG_ON(ARRAY_SIZE(nf_ct_sysctl_table) != NF_SYSCTL_CT_LAST_SYSCTL);
1068
1069 table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table),
1070 GFP_KERNEL);
1071 if (!table)
1072 return -ENOMEM;
1073
1074 table[NF_SYSCTL_CT_COUNT].data = &cnet->count;
1075 table[NF_SYSCTL_CT_CHECKSUM].data = &net->ct.sysctl_checksum;
1076 table[NF_SYSCTL_CT_LOG_INVALID].data = &net->ct.sysctl_log_invalid;
1077 table[NF_SYSCTL_CT_ACCT].data = &net->ct.sysctl_acct;
1078 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1079 table[NF_SYSCTL_CT_EVENTS].data = &net->ct.sysctl_events;
1080 #endif
1081 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
1082 table[NF_SYSCTL_CT_TIMESTAMP].data = &net->ct.sysctl_tstamp;
1083 #endif
1084 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC].data = &nf_generic_pernet(net)->timeout;
1085 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP].data = &nf_icmp_pernet(net)->timeout;
1086 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6].data = &nf_icmpv6_pernet(net)->timeout;
1087 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP].data = &un->timeouts[UDP_CT_UNREPLIED];
1088 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM].data = &un->timeouts[UDP_CT_REPLIED];
1089 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
1090 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD].data = &un->offload_timeout;
1091 #endif
1092
1093 nf_conntrack_standalone_init_tcp_sysctl(net, table);
1094 nf_conntrack_standalone_init_sctp_sysctl(net, table);
1095 nf_conntrack_standalone_init_dccp_sysctl(net, table);
1096 nf_conntrack_standalone_init_gre_sysctl(net, table);
1097
1098 /* Don't allow non-init_net ns to alter global sysctls */
1099 if (!net_eq(&init_net, net)) {
1100 table[NF_SYSCTL_CT_MAX].mode = 0444;
1101 table[NF_SYSCTL_CT_EXPECT_MAX].mode = 0444;
1102 table[NF_SYSCTL_CT_BUCKETS].mode = 0444;
1103 }
1104
1105 cnet->sysctl_header = register_net_sysctl_sz(net, "net/netfilter",
1106 table,
1107 ARRAY_SIZE(nf_ct_sysctl_table));
1108 if (!cnet->sysctl_header)
1109 goto out_unregister_netfilter;
1110
1111 return 0;
1112
1113 out_unregister_netfilter:
1114 kfree(table);
1115 return -ENOMEM;
1116 }
1117
nf_conntrack_standalone_fini_sysctl(struct net * net)1118 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1119 {
1120 struct nf_conntrack_net *cnet = nf_ct_pernet(net);
1121 const struct ctl_table *table;
1122
1123 table = cnet->sysctl_header->ctl_table_arg;
1124 unregister_net_sysctl_table(cnet->sysctl_header);
1125 kfree(table);
1126 }
1127 #else
nf_conntrack_standalone_init_sysctl(struct net * net)1128 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1129 {
1130 return 0;
1131 }
1132
nf_conntrack_standalone_fini_sysctl(struct net * net)1133 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1134 {
1135 }
1136 #endif /* CONFIG_SYSCTL */
1137
nf_conntrack_fini_net(struct net * net)1138 static void nf_conntrack_fini_net(struct net *net)
1139 {
1140 if (enable_hooks)
1141 nf_ct_netns_put(net, NFPROTO_INET);
1142
1143 nf_conntrack_standalone_fini_proc(net);
1144 nf_conntrack_standalone_fini_sysctl(net);
1145 }
1146
nf_conntrack_pernet_init(struct net * net)1147 static int nf_conntrack_pernet_init(struct net *net)
1148 {
1149 int ret;
1150
1151 net->ct.sysctl_checksum = 1;
1152
1153 ret = nf_conntrack_standalone_init_sysctl(net);
1154 if (ret < 0)
1155 return ret;
1156
1157 ret = nf_conntrack_standalone_init_proc(net);
1158 if (ret < 0)
1159 goto out_proc;
1160
1161 ret = nf_conntrack_init_net(net);
1162 if (ret < 0)
1163 goto out_init_net;
1164
1165 if (enable_hooks) {
1166 ret = nf_ct_netns_get(net, NFPROTO_INET);
1167 if (ret < 0)
1168 goto out_hooks;
1169 }
1170
1171 return 0;
1172
1173 out_hooks:
1174 nf_conntrack_cleanup_net(net);
1175 out_init_net:
1176 nf_conntrack_standalone_fini_proc(net);
1177 out_proc:
1178 nf_conntrack_standalone_fini_sysctl(net);
1179 return ret;
1180 }
1181
nf_conntrack_pernet_exit(struct list_head * net_exit_list)1182 static void nf_conntrack_pernet_exit(struct list_head *net_exit_list)
1183 {
1184 struct net *net;
1185
1186 list_for_each_entry(net, net_exit_list, exit_list)
1187 nf_conntrack_fini_net(net);
1188
1189 nf_conntrack_cleanup_net_list(net_exit_list);
1190 }
1191
1192 static struct pernet_operations nf_conntrack_net_ops = {
1193 .init = nf_conntrack_pernet_init,
1194 .exit_batch = nf_conntrack_pernet_exit,
1195 .id = &nf_conntrack_net_id,
1196 .size = sizeof(struct nf_conntrack_net),
1197 };
1198
nf_conntrack_standalone_init(void)1199 static int __init nf_conntrack_standalone_init(void)
1200 {
1201 int ret = nf_conntrack_init_start();
1202 if (ret < 0)
1203 goto out_start;
1204
1205 BUILD_BUG_ON(NFCT_INFOMASK <= IP_CT_NUMBER);
1206
1207 #ifdef CONFIG_SYSCTL
1208 nf_ct_netfilter_header =
1209 register_net_sysctl(&init_net, "net", nf_ct_netfilter_table);
1210 if (!nf_ct_netfilter_header) {
1211 pr_err("nf_conntrack: can't register to sysctl.\n");
1212 ret = -ENOMEM;
1213 goto out_sysctl;
1214 }
1215
1216 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
1217 #endif
1218
1219 nf_conntrack_init_end();
1220
1221 ret = register_pernet_subsys(&nf_conntrack_net_ops);
1222 if (ret < 0)
1223 goto out_pernet;
1224
1225 return 0;
1226
1227 out_pernet:
1228 #ifdef CONFIG_SYSCTL
1229 unregister_net_sysctl_table(nf_ct_netfilter_header);
1230 out_sysctl:
1231 #endif
1232 nf_conntrack_cleanup_end();
1233 out_start:
1234 return ret;
1235 }
1236
nf_conntrack_standalone_fini(void)1237 static void __exit nf_conntrack_standalone_fini(void)
1238 {
1239 nf_conntrack_cleanup_start();
1240 unregister_pernet_subsys(&nf_conntrack_net_ops);
1241 #ifdef CONFIG_SYSCTL
1242 unregister_net_sysctl_table(nf_ct_netfilter_header);
1243 #endif
1244 nf_conntrack_cleanup_end();
1245 }
1246
1247 module_init(nf_conntrack_standalone_init);
1248 module_exit(nf_conntrack_standalone_fini);
1249