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