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(const struct ctl_table * table,int write,void * buffer,size_t * lenp,loff_t * ppos)527 nf_conntrack_hash_sysctl(const 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 static struct ctl_table nf_ct_sysctl_table[] = {
617 [NF_SYSCTL_CT_MAX] = {
618 .procname = "nf_conntrack_max",
619 .data = &nf_conntrack_max,
620 .maxlen = sizeof(int),
621 .mode = 0644,
622 .proc_handler = proc_dointvec_minmax,
623 .extra1 = SYSCTL_ZERO,
624 .extra2 = SYSCTL_INT_MAX,
625 },
626 [NF_SYSCTL_CT_COUNT] = {
627 .procname = "nf_conntrack_count",
628 .maxlen = sizeof(int),
629 .mode = 0444,
630 .proc_handler = proc_dointvec,
631 },
632 [NF_SYSCTL_CT_BUCKETS] = {
633 .procname = "nf_conntrack_buckets",
634 .data = &nf_conntrack_htable_size_user,
635 .maxlen = sizeof(unsigned int),
636 .mode = 0644,
637 .proc_handler = nf_conntrack_hash_sysctl,
638 },
639 [NF_SYSCTL_CT_CHECKSUM] = {
640 .procname = "nf_conntrack_checksum",
641 .data = &init_net.ct.sysctl_checksum,
642 .maxlen = sizeof(u8),
643 .mode = 0644,
644 .proc_handler = proc_dou8vec_minmax,
645 .extra1 = SYSCTL_ZERO,
646 .extra2 = SYSCTL_ONE,
647 },
648 [NF_SYSCTL_CT_LOG_INVALID] = {
649 .procname = "nf_conntrack_log_invalid",
650 .data = &init_net.ct.sysctl_log_invalid,
651 .maxlen = sizeof(u8),
652 .mode = 0644,
653 .proc_handler = proc_dou8vec_minmax,
654 },
655 [NF_SYSCTL_CT_EXPECT_MAX] = {
656 .procname = "nf_conntrack_expect_max",
657 .data = &nf_ct_expect_max,
658 .maxlen = sizeof(int),
659 .mode = 0644,
660 .proc_handler = proc_dointvec_minmax,
661 .extra1 = SYSCTL_ONE,
662 .extra2 = SYSCTL_INT_MAX,
663 },
664 [NF_SYSCTL_CT_ACCT] = {
665 .procname = "nf_conntrack_acct",
666 .data = &init_net.ct.sysctl_acct,
667 .maxlen = sizeof(u8),
668 .mode = 0644,
669 .proc_handler = proc_dou8vec_minmax,
670 .extra1 = SYSCTL_ZERO,
671 .extra2 = SYSCTL_ONE,
672 },
673 #ifdef CONFIG_NF_CONNTRACK_EVENTS
674 [NF_SYSCTL_CT_EVENTS] = {
675 .procname = "nf_conntrack_events",
676 .data = &init_net.ct.sysctl_events,
677 .maxlen = sizeof(u8),
678 .mode = 0644,
679 .proc_handler = proc_dou8vec_minmax,
680 .extra1 = SYSCTL_ZERO,
681 .extra2 = SYSCTL_TWO,
682 },
683 #endif
684 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
685 [NF_SYSCTL_CT_TIMESTAMP] = {
686 .procname = "nf_conntrack_timestamp",
687 .data = &init_net.ct.sysctl_tstamp,
688 .maxlen = sizeof(u8),
689 .mode = 0644,
690 .proc_handler = proc_dou8vec_minmax,
691 .extra1 = SYSCTL_ZERO,
692 .extra2 = SYSCTL_ONE,
693 },
694 #endif
695 [NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC] = {
696 .procname = "nf_conntrack_generic_timeout",
697 .maxlen = sizeof(unsigned int),
698 .mode = 0644,
699 .proc_handler = proc_dointvec_jiffies,
700 },
701 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT] = {
702 .procname = "nf_conntrack_tcp_timeout_syn_sent",
703 .maxlen = sizeof(unsigned int),
704 .mode = 0644,
705 .proc_handler = proc_dointvec_jiffies,
706 },
707 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV] = {
708 .procname = "nf_conntrack_tcp_timeout_syn_recv",
709 .maxlen = sizeof(unsigned int),
710 .mode = 0644,
711 .proc_handler = proc_dointvec_jiffies,
712 },
713 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED] = {
714 .procname = "nf_conntrack_tcp_timeout_established",
715 .maxlen = sizeof(unsigned int),
716 .mode = 0644,
717 .proc_handler = proc_dointvec_jiffies,
718 },
719 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT] = {
720 .procname = "nf_conntrack_tcp_timeout_fin_wait",
721 .maxlen = sizeof(unsigned int),
722 .mode = 0644,
723 .proc_handler = proc_dointvec_jiffies,
724 },
725 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT] = {
726 .procname = "nf_conntrack_tcp_timeout_close_wait",
727 .maxlen = sizeof(unsigned int),
728 .mode = 0644,
729 .proc_handler = proc_dointvec_jiffies,
730 },
731 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK] = {
732 .procname = "nf_conntrack_tcp_timeout_last_ack",
733 .maxlen = sizeof(unsigned int),
734 .mode = 0644,
735 .proc_handler = proc_dointvec_jiffies,
736 },
737 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT] = {
738 .procname = "nf_conntrack_tcp_timeout_time_wait",
739 .maxlen = sizeof(unsigned int),
740 .mode = 0644,
741 .proc_handler = proc_dointvec_jiffies,
742 },
743 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE] = {
744 .procname = "nf_conntrack_tcp_timeout_close",
745 .maxlen = sizeof(unsigned int),
746 .mode = 0644,
747 .proc_handler = proc_dointvec_jiffies,
748 },
749 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS] = {
750 .procname = "nf_conntrack_tcp_timeout_max_retrans",
751 .maxlen = sizeof(unsigned int),
752 .mode = 0644,
753 .proc_handler = proc_dointvec_jiffies,
754 },
755 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK] = {
756 .procname = "nf_conntrack_tcp_timeout_unacknowledged",
757 .maxlen = sizeof(unsigned int),
758 .mode = 0644,
759 .proc_handler = proc_dointvec_jiffies,
760 },
761 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
762 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD] = {
763 .procname = "nf_flowtable_tcp_timeout",
764 .maxlen = sizeof(unsigned int),
765 .mode = 0644,
766 .proc_handler = proc_dointvec_jiffies,
767 },
768 #endif
769 [NF_SYSCTL_CT_PROTO_TCP_LOOSE] = {
770 .procname = "nf_conntrack_tcp_loose",
771 .maxlen = sizeof(u8),
772 .mode = 0644,
773 .proc_handler = proc_dou8vec_minmax,
774 .extra1 = SYSCTL_ZERO,
775 .extra2 = SYSCTL_ONE,
776 },
777 [NF_SYSCTL_CT_PROTO_TCP_LIBERAL] = {
778 .procname = "nf_conntrack_tcp_be_liberal",
779 .maxlen = sizeof(u8),
780 .mode = 0644,
781 .proc_handler = proc_dou8vec_minmax,
782 .extra1 = SYSCTL_ZERO,
783 .extra2 = SYSCTL_ONE,
784 },
785 [NF_SYSCTL_CT_PROTO_TCP_IGNORE_INVALID_RST] = {
786 .procname = "nf_conntrack_tcp_ignore_invalid_rst",
787 .maxlen = sizeof(u8),
788 .mode = 0644,
789 .proc_handler = proc_dou8vec_minmax,
790 .extra1 = SYSCTL_ZERO,
791 .extra2 = SYSCTL_ONE,
792 },
793 [NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS] = {
794 .procname = "nf_conntrack_tcp_max_retrans",
795 .maxlen = sizeof(u8),
796 .mode = 0644,
797 .proc_handler = proc_dou8vec_minmax,
798 },
799 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP] = {
800 .procname = "nf_conntrack_udp_timeout",
801 .maxlen = sizeof(unsigned int),
802 .mode = 0644,
803 .proc_handler = proc_dointvec_jiffies,
804 },
805 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM] = {
806 .procname = "nf_conntrack_udp_timeout_stream",
807 .maxlen = sizeof(unsigned int),
808 .mode = 0644,
809 .proc_handler = proc_dointvec_jiffies,
810 },
811 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
812 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD] = {
813 .procname = "nf_flowtable_udp_timeout",
814 .maxlen = sizeof(unsigned int),
815 .mode = 0644,
816 .proc_handler = proc_dointvec_jiffies,
817 },
818 #endif
819 [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP] = {
820 .procname = "nf_conntrack_icmp_timeout",
821 .maxlen = sizeof(unsigned int),
822 .mode = 0644,
823 .proc_handler = proc_dointvec_jiffies,
824 },
825 [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6] = {
826 .procname = "nf_conntrack_icmpv6_timeout",
827 .maxlen = sizeof(unsigned int),
828 .mode = 0644,
829 .proc_handler = proc_dointvec_jiffies,
830 },
831 #ifdef CONFIG_NF_CT_PROTO_SCTP
832 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED] = {
833 .procname = "nf_conntrack_sctp_timeout_closed",
834 .maxlen = sizeof(unsigned int),
835 .mode = 0644,
836 .proc_handler = proc_dointvec_jiffies,
837 },
838 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT] = {
839 .procname = "nf_conntrack_sctp_timeout_cookie_wait",
840 .maxlen = sizeof(unsigned int),
841 .mode = 0644,
842 .proc_handler = proc_dointvec_jiffies,
843 },
844 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED] = {
845 .procname = "nf_conntrack_sctp_timeout_cookie_echoed",
846 .maxlen = sizeof(unsigned int),
847 .mode = 0644,
848 .proc_handler = proc_dointvec_jiffies,
849 },
850 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED] = {
851 .procname = "nf_conntrack_sctp_timeout_established",
852 .maxlen = sizeof(unsigned int),
853 .mode = 0644,
854 .proc_handler = proc_dointvec_jiffies,
855 },
856 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT] = {
857 .procname = "nf_conntrack_sctp_timeout_shutdown_sent",
858 .maxlen = sizeof(unsigned int),
859 .mode = 0644,
860 .proc_handler = proc_dointvec_jiffies,
861 },
862 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD] = {
863 .procname = "nf_conntrack_sctp_timeout_shutdown_recd",
864 .maxlen = sizeof(unsigned int),
865 .mode = 0644,
866 .proc_handler = proc_dointvec_jiffies,
867 },
868 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT] = {
869 .procname = "nf_conntrack_sctp_timeout_shutdown_ack_sent",
870 .maxlen = sizeof(unsigned int),
871 .mode = 0644,
872 .proc_handler = proc_dointvec_jiffies,
873 },
874 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT] = {
875 .procname = "nf_conntrack_sctp_timeout_heartbeat_sent",
876 .maxlen = sizeof(unsigned int),
877 .mode = 0644,
878 .proc_handler = proc_dointvec_jiffies,
879 },
880 #endif
881 #ifdef CONFIG_NF_CT_PROTO_DCCP
882 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST] = {
883 .procname = "nf_conntrack_dccp_timeout_request",
884 .maxlen = sizeof(unsigned int),
885 .mode = 0644,
886 .proc_handler = proc_dointvec_jiffies,
887 },
888 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND] = {
889 .procname = "nf_conntrack_dccp_timeout_respond",
890 .maxlen = sizeof(unsigned int),
891 .mode = 0644,
892 .proc_handler = proc_dointvec_jiffies,
893 },
894 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN] = {
895 .procname = "nf_conntrack_dccp_timeout_partopen",
896 .maxlen = sizeof(unsigned int),
897 .mode = 0644,
898 .proc_handler = proc_dointvec_jiffies,
899 },
900 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN] = {
901 .procname = "nf_conntrack_dccp_timeout_open",
902 .maxlen = sizeof(unsigned int),
903 .mode = 0644,
904 .proc_handler = proc_dointvec_jiffies,
905 },
906 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ] = {
907 .procname = "nf_conntrack_dccp_timeout_closereq",
908 .maxlen = sizeof(unsigned int),
909 .mode = 0644,
910 .proc_handler = proc_dointvec_jiffies,
911 },
912 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING] = {
913 .procname = "nf_conntrack_dccp_timeout_closing",
914 .maxlen = sizeof(unsigned int),
915 .mode = 0644,
916 .proc_handler = proc_dointvec_jiffies,
917 },
918 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT] = {
919 .procname = "nf_conntrack_dccp_timeout_timewait",
920 .maxlen = sizeof(unsigned int),
921 .mode = 0644,
922 .proc_handler = proc_dointvec_jiffies,
923 },
924 [NF_SYSCTL_CT_PROTO_DCCP_LOOSE] = {
925 .procname = "nf_conntrack_dccp_loose",
926 .maxlen = sizeof(u8),
927 .mode = 0644,
928 .proc_handler = proc_dou8vec_minmax,
929 .extra1 = SYSCTL_ZERO,
930 .extra2 = SYSCTL_ONE,
931 },
932 #endif
933 #ifdef CONFIG_NF_CT_PROTO_GRE
934 [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE] = {
935 .procname = "nf_conntrack_gre_timeout",
936 .maxlen = sizeof(unsigned int),
937 .mode = 0644,
938 .proc_handler = proc_dointvec_jiffies,
939 },
940 [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM] = {
941 .procname = "nf_conntrack_gre_timeout_stream",
942 .maxlen = sizeof(unsigned int),
943 .mode = 0644,
944 .proc_handler = proc_dointvec_jiffies,
945 },
946 #endif
947 };
948
949 static struct ctl_table nf_ct_netfilter_table[] = {
950 {
951 .procname = "nf_conntrack_max",
952 .data = &nf_conntrack_max,
953 .maxlen = sizeof(int),
954 .mode = 0644,
955 .proc_handler = proc_dointvec_minmax,
956 .extra1 = SYSCTL_ZERO,
957 .extra2 = SYSCTL_INT_MAX,
958 },
959 };
960
nf_conntrack_standalone_init_tcp_sysctl(struct net * net,struct ctl_table * table)961 static void nf_conntrack_standalone_init_tcp_sysctl(struct net *net,
962 struct ctl_table *table)
963 {
964 struct nf_tcp_net *tn = nf_tcp_pernet(net);
965
966 #define XASSIGN(XNAME, tn) \
967 table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ ## XNAME].data = \
968 &(tn)->timeouts[TCP_CONNTRACK_ ## XNAME]
969
970 XASSIGN(SYN_SENT, tn);
971 XASSIGN(SYN_RECV, tn);
972 XASSIGN(ESTABLISHED, tn);
973 XASSIGN(FIN_WAIT, tn);
974 XASSIGN(CLOSE_WAIT, tn);
975 XASSIGN(LAST_ACK, tn);
976 XASSIGN(TIME_WAIT, tn);
977 XASSIGN(CLOSE, tn);
978 XASSIGN(RETRANS, tn);
979 XASSIGN(UNACK, tn);
980 #undef XASSIGN
981 #define XASSIGN(XNAME, rval) \
982 table[NF_SYSCTL_CT_PROTO_TCP_ ## XNAME].data = (rval)
983
984 XASSIGN(LOOSE, &tn->tcp_loose);
985 XASSIGN(LIBERAL, &tn->tcp_be_liberal);
986 XASSIGN(MAX_RETRANS, &tn->tcp_max_retrans);
987 XASSIGN(IGNORE_INVALID_RST, &tn->tcp_ignore_invalid_rst);
988 #undef XASSIGN
989
990 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
991 table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD].data = &tn->offload_timeout;
992 #endif
993
994 }
995
nf_conntrack_standalone_init_sctp_sysctl(struct net * net,struct ctl_table * table)996 static void nf_conntrack_standalone_init_sctp_sysctl(struct net *net,
997 struct ctl_table *table)
998 {
999 #ifdef CONFIG_NF_CT_PROTO_SCTP
1000 struct nf_sctp_net *sn = nf_sctp_pernet(net);
1001
1002 #define XASSIGN(XNAME, sn) \
1003 table[NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ ## XNAME].data = \
1004 &(sn)->timeouts[SCTP_CONNTRACK_ ## XNAME]
1005
1006 XASSIGN(CLOSED, sn);
1007 XASSIGN(COOKIE_WAIT, sn);
1008 XASSIGN(COOKIE_ECHOED, sn);
1009 XASSIGN(ESTABLISHED, sn);
1010 XASSIGN(SHUTDOWN_SENT, sn);
1011 XASSIGN(SHUTDOWN_RECD, sn);
1012 XASSIGN(SHUTDOWN_ACK_SENT, sn);
1013 XASSIGN(HEARTBEAT_SENT, sn);
1014 #undef XASSIGN
1015 #endif
1016 }
1017
nf_conntrack_standalone_init_dccp_sysctl(struct net * net,struct ctl_table * table)1018 static void nf_conntrack_standalone_init_dccp_sysctl(struct net *net,
1019 struct ctl_table *table)
1020 {
1021 #ifdef CONFIG_NF_CT_PROTO_DCCP
1022 struct nf_dccp_net *dn = nf_dccp_pernet(net);
1023
1024 #define XASSIGN(XNAME, dn) \
1025 table[NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_ ## XNAME].data = \
1026 &(dn)->dccp_timeout[CT_DCCP_ ## XNAME]
1027
1028 XASSIGN(REQUEST, dn);
1029 XASSIGN(RESPOND, dn);
1030 XASSIGN(PARTOPEN, dn);
1031 XASSIGN(OPEN, dn);
1032 XASSIGN(CLOSEREQ, dn);
1033 XASSIGN(CLOSING, dn);
1034 XASSIGN(TIMEWAIT, dn);
1035 #undef XASSIGN
1036
1037 table[NF_SYSCTL_CT_PROTO_DCCP_LOOSE].data = &dn->dccp_loose;
1038 #endif
1039 }
1040
nf_conntrack_standalone_init_gre_sysctl(struct net * net,struct ctl_table * table)1041 static void nf_conntrack_standalone_init_gre_sysctl(struct net *net,
1042 struct ctl_table *table)
1043 {
1044 #ifdef CONFIG_NF_CT_PROTO_GRE
1045 struct nf_gre_net *gn = nf_gre_pernet(net);
1046
1047 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE].data = &gn->timeouts[GRE_CT_UNREPLIED];
1048 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM].data = &gn->timeouts[GRE_CT_REPLIED];
1049 #endif
1050 }
1051
nf_conntrack_standalone_init_sysctl(struct net * net)1052 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1053 {
1054 struct nf_conntrack_net *cnet = nf_ct_pernet(net);
1055 struct nf_udp_net *un = nf_udp_pernet(net);
1056 struct ctl_table *table;
1057
1058 BUILD_BUG_ON(ARRAY_SIZE(nf_ct_sysctl_table) != NF_SYSCTL_CT_LAST_SYSCTL);
1059
1060 table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table),
1061 GFP_KERNEL);
1062 if (!table)
1063 return -ENOMEM;
1064
1065 table[NF_SYSCTL_CT_COUNT].data = &cnet->count;
1066 table[NF_SYSCTL_CT_CHECKSUM].data = &net->ct.sysctl_checksum;
1067 table[NF_SYSCTL_CT_LOG_INVALID].data = &net->ct.sysctl_log_invalid;
1068 table[NF_SYSCTL_CT_ACCT].data = &net->ct.sysctl_acct;
1069 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1070 table[NF_SYSCTL_CT_EVENTS].data = &net->ct.sysctl_events;
1071 #endif
1072 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
1073 table[NF_SYSCTL_CT_TIMESTAMP].data = &net->ct.sysctl_tstamp;
1074 #endif
1075 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC].data = &nf_generic_pernet(net)->timeout;
1076 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP].data = &nf_icmp_pernet(net)->timeout;
1077 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6].data = &nf_icmpv6_pernet(net)->timeout;
1078 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP].data = &un->timeouts[UDP_CT_UNREPLIED];
1079 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM].data = &un->timeouts[UDP_CT_REPLIED];
1080 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
1081 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD].data = &un->offload_timeout;
1082 #endif
1083
1084 nf_conntrack_standalone_init_tcp_sysctl(net, table);
1085 nf_conntrack_standalone_init_sctp_sysctl(net, table);
1086 nf_conntrack_standalone_init_dccp_sysctl(net, table);
1087 nf_conntrack_standalone_init_gre_sysctl(net, table);
1088
1089 /* Don't allow non-init_net ns to alter global sysctls */
1090 if (!net_eq(&init_net, net)) {
1091 table[NF_SYSCTL_CT_MAX].mode = 0444;
1092 table[NF_SYSCTL_CT_EXPECT_MAX].mode = 0444;
1093 table[NF_SYSCTL_CT_BUCKETS].mode = 0444;
1094 }
1095
1096 cnet->sysctl_header = register_net_sysctl_sz(net, "net/netfilter",
1097 table,
1098 ARRAY_SIZE(nf_ct_sysctl_table));
1099 if (!cnet->sysctl_header)
1100 goto out_unregister_netfilter;
1101
1102 return 0;
1103
1104 out_unregister_netfilter:
1105 kfree(table);
1106 return -ENOMEM;
1107 }
1108
nf_conntrack_standalone_fini_sysctl(struct net * net)1109 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1110 {
1111 struct nf_conntrack_net *cnet = nf_ct_pernet(net);
1112 const struct ctl_table *table;
1113
1114 table = cnet->sysctl_header->ctl_table_arg;
1115 unregister_net_sysctl_table(cnet->sysctl_header);
1116 kfree(table);
1117 }
1118 #else
nf_conntrack_standalone_init_sysctl(struct net * net)1119 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1120 {
1121 return 0;
1122 }
1123
nf_conntrack_standalone_fini_sysctl(struct net * net)1124 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1125 {
1126 }
1127 #endif /* CONFIG_SYSCTL */
1128
nf_conntrack_fini_net(struct net * net)1129 static void nf_conntrack_fini_net(struct net *net)
1130 {
1131 if (enable_hooks)
1132 nf_ct_netns_put(net, NFPROTO_INET);
1133
1134 nf_conntrack_standalone_fini_proc(net);
1135 nf_conntrack_standalone_fini_sysctl(net);
1136 }
1137
nf_conntrack_pernet_init(struct net * net)1138 static int nf_conntrack_pernet_init(struct net *net)
1139 {
1140 int ret;
1141
1142 net->ct.sysctl_checksum = 1;
1143
1144 ret = nf_conntrack_standalone_init_sysctl(net);
1145 if (ret < 0)
1146 return ret;
1147
1148 ret = nf_conntrack_standalone_init_proc(net);
1149 if (ret < 0)
1150 goto out_proc;
1151
1152 ret = nf_conntrack_init_net(net);
1153 if (ret < 0)
1154 goto out_init_net;
1155
1156 if (enable_hooks) {
1157 ret = nf_ct_netns_get(net, NFPROTO_INET);
1158 if (ret < 0)
1159 goto out_hooks;
1160 }
1161
1162 return 0;
1163
1164 out_hooks:
1165 nf_conntrack_cleanup_net(net);
1166 out_init_net:
1167 nf_conntrack_standalone_fini_proc(net);
1168 out_proc:
1169 nf_conntrack_standalone_fini_sysctl(net);
1170 return ret;
1171 }
1172
nf_conntrack_pernet_exit(struct list_head * net_exit_list)1173 static void nf_conntrack_pernet_exit(struct list_head *net_exit_list)
1174 {
1175 struct net *net;
1176
1177 list_for_each_entry(net, net_exit_list, exit_list)
1178 nf_conntrack_fini_net(net);
1179
1180 nf_conntrack_cleanup_net_list(net_exit_list);
1181 }
1182
1183 static struct pernet_operations nf_conntrack_net_ops = {
1184 .init = nf_conntrack_pernet_init,
1185 .exit_batch = nf_conntrack_pernet_exit,
1186 .id = &nf_conntrack_net_id,
1187 .size = sizeof(struct nf_conntrack_net),
1188 };
1189
nf_conntrack_standalone_init(void)1190 static int __init nf_conntrack_standalone_init(void)
1191 {
1192 int ret = nf_conntrack_init_start();
1193 if (ret < 0)
1194 goto out_start;
1195
1196 BUILD_BUG_ON(NFCT_INFOMASK <= IP_CT_NUMBER);
1197
1198 #ifdef CONFIG_SYSCTL
1199 nf_ct_netfilter_header =
1200 register_net_sysctl(&init_net, "net", nf_ct_netfilter_table);
1201 if (!nf_ct_netfilter_header) {
1202 pr_err("nf_conntrack: can't register to sysctl.\n");
1203 ret = -ENOMEM;
1204 goto out_sysctl;
1205 }
1206
1207 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
1208 #endif
1209
1210 nf_conntrack_init_end();
1211
1212 ret = register_pernet_subsys(&nf_conntrack_net_ops);
1213 if (ret < 0)
1214 goto out_pernet;
1215
1216 return 0;
1217
1218 out_pernet:
1219 #ifdef CONFIG_SYSCTL
1220 unregister_net_sysctl_table(nf_ct_netfilter_header);
1221 out_sysctl:
1222 #endif
1223 nf_conntrack_cleanup_end();
1224 out_start:
1225 return ret;
1226 }
1227
nf_conntrack_standalone_fini(void)1228 static void __exit nf_conntrack_standalone_fini(void)
1229 {
1230 nf_conntrack_cleanup_start();
1231 unregister_pernet_subsys(&nf_conntrack_net_ops);
1232 #ifdef CONFIG_SYSCTL
1233 unregister_net_sysctl_table(nf_ct_netfilter_header);
1234 #endif
1235 nf_conntrack_cleanup_end();
1236 }
1237
1238 module_init(nf_conntrack_standalone_init);
1239 module_exit(nf_conntrack_standalone_fini);
1240