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 unsigned int
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 0;
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 return 0;
294 }
295
296 /* return 0 on success, 1 in case of error */
ct_seq_show(struct seq_file * s,void * v)297 static int ct_seq_show(struct seq_file *s, void *v)
298 {
299 struct nf_conntrack_tuple_hash *hash = v;
300 struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
301 const struct nf_conntrack_l4proto *l4proto;
302 struct net *net = seq_file_net(s);
303 int ret = 0;
304
305 WARN_ON(!ct);
306 if (unlikely(!refcount_inc_not_zero(&ct->ct_general.use)))
307 return 0;
308
309 /* load ->status after refcount increase */
310 smp_acquire__after_ctrl_dep();
311
312 if (nf_ct_should_gc(ct)) {
313 nf_ct_kill(ct);
314 goto release;
315 }
316
317 /* we only want to print DIR_ORIGINAL */
318 if (NF_CT_DIRECTION(hash))
319 goto release;
320
321 if (!net_eq(nf_ct_net(ct), net))
322 goto release;
323
324 l4proto = nf_ct_l4proto_find(nf_ct_protonum(ct));
325
326 ret = -ENOSPC;
327 seq_printf(s, "%-8s %u %-8s %u ",
328 l3proto_name(nf_ct_l3num(ct)), nf_ct_l3num(ct),
329 l4proto_name(l4proto->l4proto), nf_ct_protonum(ct));
330
331 if (!test_bit(IPS_OFFLOAD_BIT, &ct->status))
332 seq_printf(s, "%ld ", nf_ct_expires(ct) / HZ);
333
334 if (l4proto->print_conntrack)
335 l4proto->print_conntrack(s, ct);
336
337 print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
338 l4proto);
339
340 ct_show_zone(s, ct, NF_CT_ZONE_DIR_ORIG);
341
342 if (seq_has_overflowed(s))
343 goto release;
344
345 if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL))
346 goto release;
347
348 if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
349 seq_puts(s, "[UNREPLIED] ");
350
351 print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, l4proto);
352
353 ct_show_zone(s, ct, NF_CT_ZONE_DIR_REPL);
354
355 if (seq_print_acct(s, ct, IP_CT_DIR_REPLY))
356 goto release;
357
358 if (test_bit(IPS_HW_OFFLOAD_BIT, &ct->status))
359 seq_puts(s, "[HW_OFFLOAD] ");
360 else if (test_bit(IPS_OFFLOAD_BIT, &ct->status))
361 seq_puts(s, "[OFFLOAD] ");
362 else if (test_bit(IPS_ASSURED_BIT, &ct->status))
363 seq_puts(s, "[ASSURED] ");
364
365 if (seq_has_overflowed(s))
366 goto release;
367
368 #if defined(CONFIG_NF_CONNTRACK_MARK)
369 seq_printf(s, "mark=%u ", READ_ONCE(ct->mark));
370 #endif
371
372 ct_show_secctx(s, ct);
373 ct_show_zone(s, ct, NF_CT_DEFAULT_ZONE_DIR);
374 ct_show_delta_time(s, ct);
375
376 seq_printf(s, "use=%u\n", refcount_read(&ct->ct_general.use));
377
378 if (seq_has_overflowed(s))
379 goto release;
380
381 ret = 0;
382 release:
383 nf_ct_put(ct);
384 return ret;
385 }
386
387 static const struct seq_operations ct_seq_ops = {
388 .start = ct_seq_start,
389 .next = ct_seq_next,
390 .stop = ct_seq_stop,
391 .show = ct_seq_show
392 };
393
ct_cpu_seq_start(struct seq_file * seq,loff_t * pos)394 static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
395 {
396 struct net *net = seq_file_net(seq);
397 int cpu;
398
399 if (*pos == 0)
400 return SEQ_START_TOKEN;
401
402 for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) {
403 if (!cpu_possible(cpu))
404 continue;
405 *pos = cpu + 1;
406 return per_cpu_ptr(net->ct.stat, cpu);
407 }
408
409 return NULL;
410 }
411
ct_cpu_seq_next(struct seq_file * seq,void * v,loff_t * pos)412 static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
413 {
414 struct net *net = seq_file_net(seq);
415 int cpu;
416
417 for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) {
418 if (!cpu_possible(cpu))
419 continue;
420 *pos = cpu + 1;
421 return per_cpu_ptr(net->ct.stat, cpu);
422 }
423 (*pos)++;
424 return NULL;
425 }
426
ct_cpu_seq_stop(struct seq_file * seq,void * v)427 static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
428 {
429 }
430
ct_cpu_seq_show(struct seq_file * seq,void * v)431 static int ct_cpu_seq_show(struct seq_file *seq, void *v)
432 {
433 struct net *net = seq_file_net(seq);
434 const struct ip_conntrack_stat *st = v;
435 unsigned int nr_conntracks;
436
437 if (v == SEQ_START_TOKEN) {
438 seq_puts(seq, "entries clashres found new invalid ignore delete chainlength insert insert_failed drop early_drop icmp_error expect_new expect_create expect_delete search_restart\n");
439 return 0;
440 }
441
442 nr_conntracks = nf_conntrack_count(net);
443
444 seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
445 "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n",
446 nr_conntracks,
447 st->clash_resolve,
448 st->found,
449 0,
450 st->invalid,
451 0,
452 0,
453 st->chaintoolong,
454 st->insert,
455 st->insert_failed,
456 st->drop,
457 st->early_drop,
458 st->error,
459
460 st->expect_new,
461 st->expect_create,
462 st->expect_delete,
463 st->search_restart
464 );
465 return 0;
466 }
467
468 static const struct seq_operations ct_cpu_seq_ops = {
469 .start = ct_cpu_seq_start,
470 .next = ct_cpu_seq_next,
471 .stop = ct_cpu_seq_stop,
472 .show = ct_cpu_seq_show,
473 };
474
nf_conntrack_standalone_init_proc(struct net * net)475 static int nf_conntrack_standalone_init_proc(struct net *net)
476 {
477 struct proc_dir_entry *pde;
478 kuid_t root_uid;
479 kgid_t root_gid;
480
481 pde = proc_create_net("nf_conntrack", 0440, net->proc_net, &ct_seq_ops,
482 sizeof(struct ct_iter_state));
483 if (!pde)
484 goto out_nf_conntrack;
485
486 root_uid = make_kuid(net->user_ns, 0);
487 root_gid = make_kgid(net->user_ns, 0);
488 if (uid_valid(root_uid) && gid_valid(root_gid))
489 proc_set_user(pde, root_uid, root_gid);
490
491 pde = proc_create_net("nf_conntrack", 0444, net->proc_net_stat,
492 &ct_cpu_seq_ops, sizeof(struct seq_net_private));
493 if (!pde)
494 goto out_stat_nf_conntrack;
495 return 0;
496
497 out_stat_nf_conntrack:
498 remove_proc_entry("nf_conntrack", net->proc_net);
499 out_nf_conntrack:
500 return -ENOMEM;
501 }
502
nf_conntrack_standalone_fini_proc(struct net * net)503 static void nf_conntrack_standalone_fini_proc(struct net *net)
504 {
505 remove_proc_entry("nf_conntrack", net->proc_net_stat);
506 remove_proc_entry("nf_conntrack", net->proc_net);
507 }
508 #else
nf_conntrack_standalone_init_proc(struct net * net)509 static int nf_conntrack_standalone_init_proc(struct net *net)
510 {
511 return 0;
512 }
513
nf_conntrack_standalone_fini_proc(struct net * net)514 static void nf_conntrack_standalone_fini_proc(struct net *net)
515 {
516 }
517 #endif /* CONFIG_NF_CONNTRACK_PROCFS */
518
nf_conntrack_count(const struct net * net)519 u32 nf_conntrack_count(const struct net *net)
520 {
521 const struct nf_conntrack_net *cnet = nf_ct_pernet(net);
522
523 return atomic_read(&cnet->count);
524 }
525 EXPORT_SYMBOL_GPL(nf_conntrack_count);
526
527 /* Sysctl support */
528
529 #ifdef CONFIG_SYSCTL
530 /* size the user *wants to set */
531 static unsigned int nf_conntrack_htable_size_user __read_mostly;
532
533 static int
nf_conntrack_hash_sysctl(struct ctl_table * table,int write,void * buffer,size_t * lenp,loff_t * ppos)534 nf_conntrack_hash_sysctl(struct ctl_table *table, int write,
535 void *buffer, size_t *lenp, loff_t *ppos)
536 {
537 int ret;
538
539 /* module_param hashsize could have changed value */
540 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
541
542 ret = proc_dointvec(table, write, buffer, lenp, ppos);
543 if (ret < 0 || !write)
544 return ret;
545
546 /* update ret, we might not be able to satisfy request */
547 ret = nf_conntrack_hash_resize(nf_conntrack_htable_size_user);
548
549 /* update it to the actual value used by conntrack */
550 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
551 return ret;
552 }
553
554 static struct ctl_table_header *nf_ct_netfilter_header;
555
556 enum nf_ct_sysctl_index {
557 NF_SYSCTL_CT_MAX,
558 NF_SYSCTL_CT_COUNT,
559 NF_SYSCTL_CT_BUCKETS,
560 NF_SYSCTL_CT_CHECKSUM,
561 NF_SYSCTL_CT_LOG_INVALID,
562 NF_SYSCTL_CT_EXPECT_MAX,
563 NF_SYSCTL_CT_ACCT,
564 #ifdef CONFIG_NF_CONNTRACK_EVENTS
565 NF_SYSCTL_CT_EVENTS,
566 #endif
567 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
568 NF_SYSCTL_CT_TIMESTAMP,
569 #endif
570 NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC,
571 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT,
572 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV,
573 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED,
574 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT,
575 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT,
576 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK,
577 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT,
578 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE,
579 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS,
580 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK,
581 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
582 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD,
583 #endif
584 NF_SYSCTL_CT_PROTO_TCP_LOOSE,
585 NF_SYSCTL_CT_PROTO_TCP_LIBERAL,
586 NF_SYSCTL_CT_PROTO_TCP_IGNORE_INVALID_RST,
587 NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS,
588 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP,
589 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM,
590 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
591 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD,
592 #endif
593 NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP,
594 NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6,
595 #ifdef CONFIG_NF_CT_PROTO_SCTP
596 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED,
597 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT,
598 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED,
599 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED,
600 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT,
601 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD,
602 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT,
603 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT,
604 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_ACKED,
605 #endif
606 #ifdef CONFIG_NF_CT_PROTO_DCCP
607 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST,
608 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND,
609 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN,
610 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN,
611 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ,
612 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING,
613 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT,
614 NF_SYSCTL_CT_PROTO_DCCP_LOOSE,
615 #endif
616 #ifdef CONFIG_NF_CT_PROTO_GRE
617 NF_SYSCTL_CT_PROTO_TIMEOUT_GRE,
618 NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM,
619 #endif
620 #ifdef CONFIG_LWTUNNEL
621 NF_SYSCTL_CT_LWTUNNEL,
622 #endif
623
624 __NF_SYSCTL_CT_LAST_SYSCTL,
625 };
626
627 #define NF_SYSCTL_CT_LAST_SYSCTL (__NF_SYSCTL_CT_LAST_SYSCTL + 1)
628
629 static struct ctl_table nf_ct_sysctl_table[] = {
630 [NF_SYSCTL_CT_MAX] = {
631 .procname = "nf_conntrack_max",
632 .data = &nf_conntrack_max,
633 .maxlen = sizeof(int),
634 .mode = 0644,
635 .proc_handler = proc_dointvec,
636 },
637 [NF_SYSCTL_CT_COUNT] = {
638 .procname = "nf_conntrack_count",
639 .maxlen = sizeof(int),
640 .mode = 0444,
641 .proc_handler = proc_dointvec,
642 },
643 [NF_SYSCTL_CT_BUCKETS] = {
644 .procname = "nf_conntrack_buckets",
645 .data = &nf_conntrack_htable_size_user,
646 .maxlen = sizeof(unsigned int),
647 .mode = 0644,
648 .proc_handler = nf_conntrack_hash_sysctl,
649 },
650 [NF_SYSCTL_CT_CHECKSUM] = {
651 .procname = "nf_conntrack_checksum",
652 .data = &init_net.ct.sysctl_checksum,
653 .maxlen = sizeof(u8),
654 .mode = 0644,
655 .proc_handler = proc_dou8vec_minmax,
656 .extra1 = SYSCTL_ZERO,
657 .extra2 = SYSCTL_ONE,
658 },
659 [NF_SYSCTL_CT_LOG_INVALID] = {
660 .procname = "nf_conntrack_log_invalid",
661 .data = &init_net.ct.sysctl_log_invalid,
662 .maxlen = sizeof(u8),
663 .mode = 0644,
664 .proc_handler = proc_dou8vec_minmax,
665 },
666 [NF_SYSCTL_CT_EXPECT_MAX] = {
667 .procname = "nf_conntrack_expect_max",
668 .data = &nf_ct_expect_max,
669 .maxlen = sizeof(int),
670 .mode = 0644,
671 .proc_handler = proc_dointvec,
672 },
673 [NF_SYSCTL_CT_ACCT] = {
674 .procname = "nf_conntrack_acct",
675 .data = &init_net.ct.sysctl_acct,
676 .maxlen = sizeof(u8),
677 .mode = 0644,
678 .proc_handler = proc_dou8vec_minmax,
679 .extra1 = SYSCTL_ZERO,
680 .extra2 = SYSCTL_ONE,
681 },
682 #ifdef CONFIG_NF_CONNTRACK_EVENTS
683 [NF_SYSCTL_CT_EVENTS] = {
684 .procname = "nf_conntrack_events",
685 .data = &init_net.ct.sysctl_events,
686 .maxlen = sizeof(u8),
687 .mode = 0644,
688 .proc_handler = proc_dou8vec_minmax,
689 .extra1 = SYSCTL_ZERO,
690 .extra2 = SYSCTL_TWO,
691 },
692 #endif
693 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
694 [NF_SYSCTL_CT_TIMESTAMP] = {
695 .procname = "nf_conntrack_timestamp",
696 .data = &init_net.ct.sysctl_tstamp,
697 .maxlen = sizeof(u8),
698 .mode = 0644,
699 .proc_handler = proc_dou8vec_minmax,
700 .extra1 = SYSCTL_ZERO,
701 .extra2 = SYSCTL_ONE,
702 },
703 #endif
704 [NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC] = {
705 .procname = "nf_conntrack_generic_timeout",
706 .maxlen = sizeof(unsigned int),
707 .mode = 0644,
708 .proc_handler = proc_dointvec_jiffies,
709 },
710 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT] = {
711 .procname = "nf_conntrack_tcp_timeout_syn_sent",
712 .maxlen = sizeof(unsigned int),
713 .mode = 0644,
714 .proc_handler = proc_dointvec_jiffies,
715 },
716 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV] = {
717 .procname = "nf_conntrack_tcp_timeout_syn_recv",
718 .maxlen = sizeof(unsigned int),
719 .mode = 0644,
720 .proc_handler = proc_dointvec_jiffies,
721 },
722 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED] = {
723 .procname = "nf_conntrack_tcp_timeout_established",
724 .maxlen = sizeof(unsigned int),
725 .mode = 0644,
726 .proc_handler = proc_dointvec_jiffies,
727 },
728 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT] = {
729 .procname = "nf_conntrack_tcp_timeout_fin_wait",
730 .maxlen = sizeof(unsigned int),
731 .mode = 0644,
732 .proc_handler = proc_dointvec_jiffies,
733 },
734 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT] = {
735 .procname = "nf_conntrack_tcp_timeout_close_wait",
736 .maxlen = sizeof(unsigned int),
737 .mode = 0644,
738 .proc_handler = proc_dointvec_jiffies,
739 },
740 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK] = {
741 .procname = "nf_conntrack_tcp_timeout_last_ack",
742 .maxlen = sizeof(unsigned int),
743 .mode = 0644,
744 .proc_handler = proc_dointvec_jiffies,
745 },
746 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT] = {
747 .procname = "nf_conntrack_tcp_timeout_time_wait",
748 .maxlen = sizeof(unsigned int),
749 .mode = 0644,
750 .proc_handler = proc_dointvec_jiffies,
751 },
752 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE] = {
753 .procname = "nf_conntrack_tcp_timeout_close",
754 .maxlen = sizeof(unsigned int),
755 .mode = 0644,
756 .proc_handler = proc_dointvec_jiffies,
757 },
758 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS] = {
759 .procname = "nf_conntrack_tcp_timeout_max_retrans",
760 .maxlen = sizeof(unsigned int),
761 .mode = 0644,
762 .proc_handler = proc_dointvec_jiffies,
763 },
764 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK] = {
765 .procname = "nf_conntrack_tcp_timeout_unacknowledged",
766 .maxlen = sizeof(unsigned int),
767 .mode = 0644,
768 .proc_handler = proc_dointvec_jiffies,
769 },
770 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
771 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD] = {
772 .procname = "nf_flowtable_tcp_timeout",
773 .maxlen = sizeof(unsigned int),
774 .mode = 0644,
775 .proc_handler = proc_dointvec_jiffies,
776 },
777 #endif
778 [NF_SYSCTL_CT_PROTO_TCP_LOOSE] = {
779 .procname = "nf_conntrack_tcp_loose",
780 .maxlen = sizeof(u8),
781 .mode = 0644,
782 .proc_handler = proc_dou8vec_minmax,
783 .extra1 = SYSCTL_ZERO,
784 .extra2 = SYSCTL_ONE,
785 },
786 [NF_SYSCTL_CT_PROTO_TCP_LIBERAL] = {
787 .procname = "nf_conntrack_tcp_be_liberal",
788 .maxlen = sizeof(u8),
789 .mode = 0644,
790 .proc_handler = proc_dou8vec_minmax,
791 .extra1 = SYSCTL_ZERO,
792 .extra2 = SYSCTL_ONE,
793 },
794 [NF_SYSCTL_CT_PROTO_TCP_IGNORE_INVALID_RST] = {
795 .procname = "nf_conntrack_tcp_ignore_invalid_rst",
796 .maxlen = sizeof(u8),
797 .mode = 0644,
798 .proc_handler = proc_dou8vec_minmax,
799 .extra1 = SYSCTL_ZERO,
800 .extra2 = SYSCTL_ONE,
801 },
802 [NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS] = {
803 .procname = "nf_conntrack_tcp_max_retrans",
804 .maxlen = sizeof(u8),
805 .mode = 0644,
806 .proc_handler = proc_dou8vec_minmax,
807 },
808 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP] = {
809 .procname = "nf_conntrack_udp_timeout",
810 .maxlen = sizeof(unsigned int),
811 .mode = 0644,
812 .proc_handler = proc_dointvec_jiffies,
813 },
814 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM] = {
815 .procname = "nf_conntrack_udp_timeout_stream",
816 .maxlen = sizeof(unsigned int),
817 .mode = 0644,
818 .proc_handler = proc_dointvec_jiffies,
819 },
820 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
821 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD] = {
822 .procname = "nf_flowtable_udp_timeout",
823 .maxlen = sizeof(unsigned int),
824 .mode = 0644,
825 .proc_handler = proc_dointvec_jiffies,
826 },
827 #endif
828 [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP] = {
829 .procname = "nf_conntrack_icmp_timeout",
830 .maxlen = sizeof(unsigned int),
831 .mode = 0644,
832 .proc_handler = proc_dointvec_jiffies,
833 },
834 [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6] = {
835 .procname = "nf_conntrack_icmpv6_timeout",
836 .maxlen = sizeof(unsigned int),
837 .mode = 0644,
838 .proc_handler = proc_dointvec_jiffies,
839 },
840 #ifdef CONFIG_NF_CT_PROTO_SCTP
841 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED] = {
842 .procname = "nf_conntrack_sctp_timeout_closed",
843 .maxlen = sizeof(unsigned int),
844 .mode = 0644,
845 .proc_handler = proc_dointvec_jiffies,
846 },
847 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT] = {
848 .procname = "nf_conntrack_sctp_timeout_cookie_wait",
849 .maxlen = sizeof(unsigned int),
850 .mode = 0644,
851 .proc_handler = proc_dointvec_jiffies,
852 },
853 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED] = {
854 .procname = "nf_conntrack_sctp_timeout_cookie_echoed",
855 .maxlen = sizeof(unsigned int),
856 .mode = 0644,
857 .proc_handler = proc_dointvec_jiffies,
858 },
859 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED] = {
860 .procname = "nf_conntrack_sctp_timeout_established",
861 .maxlen = sizeof(unsigned int),
862 .mode = 0644,
863 .proc_handler = proc_dointvec_jiffies,
864 },
865 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT] = {
866 .procname = "nf_conntrack_sctp_timeout_shutdown_sent",
867 .maxlen = sizeof(unsigned int),
868 .mode = 0644,
869 .proc_handler = proc_dointvec_jiffies,
870 },
871 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD] = {
872 .procname = "nf_conntrack_sctp_timeout_shutdown_recd",
873 .maxlen = sizeof(unsigned int),
874 .mode = 0644,
875 .proc_handler = proc_dointvec_jiffies,
876 },
877 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT] = {
878 .procname = "nf_conntrack_sctp_timeout_shutdown_ack_sent",
879 .maxlen = sizeof(unsigned int),
880 .mode = 0644,
881 .proc_handler = proc_dointvec_jiffies,
882 },
883 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT] = {
884 .procname = "nf_conntrack_sctp_timeout_heartbeat_sent",
885 .maxlen = sizeof(unsigned int),
886 .mode = 0644,
887 .proc_handler = proc_dointvec_jiffies,
888 },
889 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_ACKED] = {
890 .procname = "nf_conntrack_sctp_timeout_heartbeat_acked",
891 .maxlen = sizeof(unsigned int),
892 .mode = 0644,
893 .proc_handler = proc_dointvec_jiffies,
894 },
895 #endif
896 #ifdef CONFIG_NF_CT_PROTO_DCCP
897 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST] = {
898 .procname = "nf_conntrack_dccp_timeout_request",
899 .maxlen = sizeof(unsigned int),
900 .mode = 0644,
901 .proc_handler = proc_dointvec_jiffies,
902 },
903 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND] = {
904 .procname = "nf_conntrack_dccp_timeout_respond",
905 .maxlen = sizeof(unsigned int),
906 .mode = 0644,
907 .proc_handler = proc_dointvec_jiffies,
908 },
909 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN] = {
910 .procname = "nf_conntrack_dccp_timeout_partopen",
911 .maxlen = sizeof(unsigned int),
912 .mode = 0644,
913 .proc_handler = proc_dointvec_jiffies,
914 },
915 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN] = {
916 .procname = "nf_conntrack_dccp_timeout_open",
917 .maxlen = sizeof(unsigned int),
918 .mode = 0644,
919 .proc_handler = proc_dointvec_jiffies,
920 },
921 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ] = {
922 .procname = "nf_conntrack_dccp_timeout_closereq",
923 .maxlen = sizeof(unsigned int),
924 .mode = 0644,
925 .proc_handler = proc_dointvec_jiffies,
926 },
927 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING] = {
928 .procname = "nf_conntrack_dccp_timeout_closing",
929 .maxlen = sizeof(unsigned int),
930 .mode = 0644,
931 .proc_handler = proc_dointvec_jiffies,
932 },
933 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT] = {
934 .procname = "nf_conntrack_dccp_timeout_timewait",
935 .maxlen = sizeof(unsigned int),
936 .mode = 0644,
937 .proc_handler = proc_dointvec_jiffies,
938 },
939 [NF_SYSCTL_CT_PROTO_DCCP_LOOSE] = {
940 .procname = "nf_conntrack_dccp_loose",
941 .maxlen = sizeof(u8),
942 .mode = 0644,
943 .proc_handler = proc_dou8vec_minmax,
944 .extra1 = SYSCTL_ZERO,
945 .extra2 = SYSCTL_ONE,
946 },
947 #endif
948 #ifdef CONFIG_NF_CT_PROTO_GRE
949 [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE] = {
950 .procname = "nf_conntrack_gre_timeout",
951 .maxlen = sizeof(unsigned int),
952 .mode = 0644,
953 .proc_handler = proc_dointvec_jiffies,
954 },
955 [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM] = {
956 .procname = "nf_conntrack_gre_timeout_stream",
957 .maxlen = sizeof(unsigned int),
958 .mode = 0644,
959 .proc_handler = proc_dointvec_jiffies,
960 },
961 #endif
962 #ifdef CONFIG_LWTUNNEL
963 [NF_SYSCTL_CT_LWTUNNEL] = {
964 .procname = "nf_hooks_lwtunnel",
965 .data = NULL,
966 .maxlen = sizeof(int),
967 .mode = 0644,
968 .proc_handler = nf_hooks_lwtunnel_sysctl_handler,
969 },
970 #endif
971 {}
972 };
973
974 static struct ctl_table nf_ct_netfilter_table[] = {
975 {
976 .procname = "nf_conntrack_max",
977 .data = &nf_conntrack_max,
978 .maxlen = sizeof(int),
979 .mode = 0644,
980 .proc_handler = proc_dointvec,
981 },
982 { }
983 };
984
nf_conntrack_standalone_init_tcp_sysctl(struct net * net,struct ctl_table * table)985 static void nf_conntrack_standalone_init_tcp_sysctl(struct net *net,
986 struct ctl_table *table)
987 {
988 struct nf_tcp_net *tn = nf_tcp_pernet(net);
989
990 #define XASSIGN(XNAME, tn) \
991 table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ ## XNAME].data = \
992 &(tn)->timeouts[TCP_CONNTRACK_ ## XNAME]
993
994 XASSIGN(SYN_SENT, tn);
995 XASSIGN(SYN_RECV, tn);
996 XASSIGN(ESTABLISHED, tn);
997 XASSIGN(FIN_WAIT, tn);
998 XASSIGN(CLOSE_WAIT, tn);
999 XASSIGN(LAST_ACK, tn);
1000 XASSIGN(TIME_WAIT, tn);
1001 XASSIGN(CLOSE, tn);
1002 XASSIGN(RETRANS, tn);
1003 XASSIGN(UNACK, tn);
1004 #undef XASSIGN
1005 #define XASSIGN(XNAME, rval) \
1006 table[NF_SYSCTL_CT_PROTO_TCP_ ## XNAME].data = (rval)
1007
1008 XASSIGN(LOOSE, &tn->tcp_loose);
1009 XASSIGN(LIBERAL, &tn->tcp_be_liberal);
1010 XASSIGN(MAX_RETRANS, &tn->tcp_max_retrans);
1011 XASSIGN(IGNORE_INVALID_RST, &tn->tcp_ignore_invalid_rst);
1012 #undef XASSIGN
1013
1014 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
1015 table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD].data = &tn->offload_timeout;
1016 #endif
1017
1018 }
1019
nf_conntrack_standalone_init_sctp_sysctl(struct net * net,struct ctl_table * table)1020 static void nf_conntrack_standalone_init_sctp_sysctl(struct net *net,
1021 struct ctl_table *table)
1022 {
1023 #ifdef CONFIG_NF_CT_PROTO_SCTP
1024 struct nf_sctp_net *sn = nf_sctp_pernet(net);
1025
1026 #define XASSIGN(XNAME, sn) \
1027 table[NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ ## XNAME].data = \
1028 &(sn)->timeouts[SCTP_CONNTRACK_ ## XNAME]
1029
1030 XASSIGN(CLOSED, sn);
1031 XASSIGN(COOKIE_WAIT, sn);
1032 XASSIGN(COOKIE_ECHOED, sn);
1033 XASSIGN(ESTABLISHED, sn);
1034 XASSIGN(SHUTDOWN_SENT, sn);
1035 XASSIGN(SHUTDOWN_RECD, sn);
1036 XASSIGN(SHUTDOWN_ACK_SENT, sn);
1037 XASSIGN(HEARTBEAT_SENT, sn);
1038 XASSIGN(HEARTBEAT_ACKED, sn);
1039 #undef XASSIGN
1040 #endif
1041 }
1042
nf_conntrack_standalone_init_dccp_sysctl(struct net * net,struct ctl_table * table)1043 static void nf_conntrack_standalone_init_dccp_sysctl(struct net *net,
1044 struct ctl_table *table)
1045 {
1046 #ifdef CONFIG_NF_CT_PROTO_DCCP
1047 struct nf_dccp_net *dn = nf_dccp_pernet(net);
1048
1049 #define XASSIGN(XNAME, dn) \
1050 table[NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_ ## XNAME].data = \
1051 &(dn)->dccp_timeout[CT_DCCP_ ## XNAME]
1052
1053 XASSIGN(REQUEST, dn);
1054 XASSIGN(RESPOND, dn);
1055 XASSIGN(PARTOPEN, dn);
1056 XASSIGN(OPEN, dn);
1057 XASSIGN(CLOSEREQ, dn);
1058 XASSIGN(CLOSING, dn);
1059 XASSIGN(TIMEWAIT, dn);
1060 #undef XASSIGN
1061
1062 table[NF_SYSCTL_CT_PROTO_DCCP_LOOSE].data = &dn->dccp_loose;
1063 #endif
1064 }
1065
nf_conntrack_standalone_init_gre_sysctl(struct net * net,struct ctl_table * table)1066 static void nf_conntrack_standalone_init_gre_sysctl(struct net *net,
1067 struct ctl_table *table)
1068 {
1069 #ifdef CONFIG_NF_CT_PROTO_GRE
1070 struct nf_gre_net *gn = nf_gre_pernet(net);
1071
1072 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE].data = &gn->timeouts[GRE_CT_UNREPLIED];
1073 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM].data = &gn->timeouts[GRE_CT_REPLIED];
1074 #endif
1075 }
1076
nf_conntrack_standalone_init_sysctl(struct net * net)1077 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1078 {
1079 struct nf_conntrack_net *cnet = nf_ct_pernet(net);
1080 struct nf_udp_net *un = nf_udp_pernet(net);
1081 struct ctl_table *table;
1082
1083 BUILD_BUG_ON(ARRAY_SIZE(nf_ct_sysctl_table) != NF_SYSCTL_CT_LAST_SYSCTL);
1084
1085 table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table),
1086 GFP_KERNEL);
1087 if (!table)
1088 return -ENOMEM;
1089
1090 table[NF_SYSCTL_CT_COUNT].data = &cnet->count;
1091 table[NF_SYSCTL_CT_CHECKSUM].data = &net->ct.sysctl_checksum;
1092 table[NF_SYSCTL_CT_LOG_INVALID].data = &net->ct.sysctl_log_invalid;
1093 table[NF_SYSCTL_CT_ACCT].data = &net->ct.sysctl_acct;
1094 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1095 table[NF_SYSCTL_CT_EVENTS].data = &net->ct.sysctl_events;
1096 #endif
1097 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
1098 table[NF_SYSCTL_CT_TIMESTAMP].data = &net->ct.sysctl_tstamp;
1099 #endif
1100 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC].data = &nf_generic_pernet(net)->timeout;
1101 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP].data = &nf_icmp_pernet(net)->timeout;
1102 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6].data = &nf_icmpv6_pernet(net)->timeout;
1103 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP].data = &un->timeouts[UDP_CT_UNREPLIED];
1104 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM].data = &un->timeouts[UDP_CT_REPLIED];
1105 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
1106 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD].data = &un->offload_timeout;
1107 #endif
1108
1109 nf_conntrack_standalone_init_tcp_sysctl(net, table);
1110 nf_conntrack_standalone_init_sctp_sysctl(net, table);
1111 nf_conntrack_standalone_init_dccp_sysctl(net, table);
1112 nf_conntrack_standalone_init_gre_sysctl(net, table);
1113
1114 /* Don't allow non-init_net ns to alter global sysctls */
1115 if (!net_eq(&init_net, net)) {
1116 table[NF_SYSCTL_CT_MAX].mode = 0444;
1117 table[NF_SYSCTL_CT_EXPECT_MAX].mode = 0444;
1118 table[NF_SYSCTL_CT_BUCKETS].mode = 0444;
1119 }
1120
1121 cnet->sysctl_header = register_net_sysctl(net, "net/netfilter", table);
1122 if (!cnet->sysctl_header)
1123 goto out_unregister_netfilter;
1124
1125 return 0;
1126
1127 out_unregister_netfilter:
1128 kfree(table);
1129 return -ENOMEM;
1130 }
1131
nf_conntrack_standalone_fini_sysctl(struct net * net)1132 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1133 {
1134 struct nf_conntrack_net *cnet = nf_ct_pernet(net);
1135 struct ctl_table *table;
1136
1137 table = cnet->sysctl_header->ctl_table_arg;
1138 unregister_net_sysctl_table(cnet->sysctl_header);
1139 kfree(table);
1140 }
1141 #else
nf_conntrack_standalone_init_sysctl(struct net * net)1142 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1143 {
1144 return 0;
1145 }
1146
nf_conntrack_standalone_fini_sysctl(struct net * net)1147 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1148 {
1149 }
1150 #endif /* CONFIG_SYSCTL */
1151
nf_conntrack_fini_net(struct net * net)1152 static void nf_conntrack_fini_net(struct net *net)
1153 {
1154 if (enable_hooks)
1155 nf_ct_netns_put(net, NFPROTO_INET);
1156
1157 nf_conntrack_standalone_fini_proc(net);
1158 nf_conntrack_standalone_fini_sysctl(net);
1159 }
1160
nf_conntrack_pernet_init(struct net * net)1161 static int nf_conntrack_pernet_init(struct net *net)
1162 {
1163 int ret;
1164
1165 net->ct.sysctl_checksum = 1;
1166
1167 ret = nf_conntrack_standalone_init_sysctl(net);
1168 if (ret < 0)
1169 return ret;
1170
1171 ret = nf_conntrack_standalone_init_proc(net);
1172 if (ret < 0)
1173 goto out_proc;
1174
1175 ret = nf_conntrack_init_net(net);
1176 if (ret < 0)
1177 goto out_init_net;
1178
1179 if (enable_hooks) {
1180 ret = nf_ct_netns_get(net, NFPROTO_INET);
1181 if (ret < 0)
1182 goto out_hooks;
1183 }
1184
1185 return 0;
1186
1187 out_hooks:
1188 nf_conntrack_cleanup_net(net);
1189 out_init_net:
1190 nf_conntrack_standalone_fini_proc(net);
1191 out_proc:
1192 nf_conntrack_standalone_fini_sysctl(net);
1193 return ret;
1194 }
1195
nf_conntrack_pernet_exit(struct list_head * net_exit_list)1196 static void nf_conntrack_pernet_exit(struct list_head *net_exit_list)
1197 {
1198 struct net *net;
1199
1200 list_for_each_entry(net, net_exit_list, exit_list)
1201 nf_conntrack_fini_net(net);
1202
1203 nf_conntrack_cleanup_net_list(net_exit_list);
1204 }
1205
1206 static struct pernet_operations nf_conntrack_net_ops = {
1207 .init = nf_conntrack_pernet_init,
1208 .exit_batch = nf_conntrack_pernet_exit,
1209 .id = &nf_conntrack_net_id,
1210 .size = sizeof(struct nf_conntrack_net),
1211 };
1212
nf_conntrack_standalone_init(void)1213 static int __init nf_conntrack_standalone_init(void)
1214 {
1215 int ret = nf_conntrack_init_start();
1216 if (ret < 0)
1217 goto out_start;
1218
1219 BUILD_BUG_ON(NFCT_INFOMASK <= IP_CT_NUMBER);
1220
1221 #ifdef CONFIG_SYSCTL
1222 nf_ct_netfilter_header =
1223 register_net_sysctl(&init_net, "net", nf_ct_netfilter_table);
1224 if (!nf_ct_netfilter_header) {
1225 pr_err("nf_conntrack: can't register to sysctl.\n");
1226 ret = -ENOMEM;
1227 goto out_sysctl;
1228 }
1229
1230 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
1231 #endif
1232
1233 ret = register_pernet_subsys(&nf_conntrack_net_ops);
1234 if (ret < 0)
1235 goto out_pernet;
1236
1237 nf_conntrack_init_end();
1238 return 0;
1239
1240 out_pernet:
1241 #ifdef CONFIG_SYSCTL
1242 unregister_net_sysctl_table(nf_ct_netfilter_header);
1243 out_sysctl:
1244 #endif
1245 nf_conntrack_cleanup_end();
1246 out_start:
1247 return ret;
1248 }
1249
nf_conntrack_standalone_fini(void)1250 static void __exit nf_conntrack_standalone_fini(void)
1251 {
1252 nf_conntrack_cleanup_start();
1253 unregister_pernet_subsys(&nf_conntrack_net_ops);
1254 #ifdef CONFIG_SYSCTL
1255 unregister_net_sysctl_table(nf_ct_netfilter_header);
1256 #endif
1257 nf_conntrack_cleanup_end();
1258 }
1259
1260 module_init(nf_conntrack_standalone_init);
1261 module_exit(nf_conntrack_standalone_fini);
1262
