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 #endif
605 #ifdef CONFIG_NF_CT_PROTO_DCCP
606 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST,
607 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND,
608 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN,
609 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN,
610 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ,
611 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING,
612 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT,
613 NF_SYSCTL_CT_PROTO_DCCP_LOOSE,
614 #endif
615 #ifdef CONFIG_NF_CT_PROTO_GRE
616 NF_SYSCTL_CT_PROTO_TIMEOUT_GRE,
617 NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM,
618 #endif
619 #ifdef CONFIG_LWTUNNEL
620 NF_SYSCTL_CT_LWTUNNEL,
621 #endif
622
623 __NF_SYSCTL_CT_LAST_SYSCTL,
624 };
625
626 #define NF_SYSCTL_CT_LAST_SYSCTL (__NF_SYSCTL_CT_LAST_SYSCTL + 1)
627
628 static struct ctl_table nf_ct_sysctl_table[] = {
629 [NF_SYSCTL_CT_MAX] = {
630 .procname = "nf_conntrack_max",
631 .data = &nf_conntrack_max,
632 .maxlen = sizeof(int),
633 .mode = 0644,
634 .proc_handler = proc_dointvec,
635 },
636 [NF_SYSCTL_CT_COUNT] = {
637 .procname = "nf_conntrack_count",
638 .maxlen = sizeof(int),
639 .mode = 0444,
640 .proc_handler = proc_dointvec,
641 },
642 [NF_SYSCTL_CT_BUCKETS] = {
643 .procname = "nf_conntrack_buckets",
644 .data = &nf_conntrack_htable_size_user,
645 .maxlen = sizeof(unsigned int),
646 .mode = 0644,
647 .proc_handler = nf_conntrack_hash_sysctl,
648 },
649 [NF_SYSCTL_CT_CHECKSUM] = {
650 .procname = "nf_conntrack_checksum",
651 .data = &init_net.ct.sysctl_checksum,
652 .maxlen = sizeof(u8),
653 .mode = 0644,
654 .proc_handler = proc_dou8vec_minmax,
655 .extra1 = SYSCTL_ZERO,
656 .extra2 = SYSCTL_ONE,
657 },
658 [NF_SYSCTL_CT_LOG_INVALID] = {
659 .procname = "nf_conntrack_log_invalid",
660 .data = &init_net.ct.sysctl_log_invalid,
661 .maxlen = sizeof(u8),
662 .mode = 0644,
663 .proc_handler = proc_dou8vec_minmax,
664 },
665 [NF_SYSCTL_CT_EXPECT_MAX] = {
666 .procname = "nf_conntrack_expect_max",
667 .data = &nf_ct_expect_max,
668 .maxlen = sizeof(int),
669 .mode = 0644,
670 .proc_handler = proc_dointvec,
671 },
672 [NF_SYSCTL_CT_ACCT] = {
673 .procname = "nf_conntrack_acct",
674 .data = &init_net.ct.sysctl_acct,
675 .maxlen = sizeof(u8),
676 .mode = 0644,
677 .proc_handler = proc_dou8vec_minmax,
678 .extra1 = SYSCTL_ZERO,
679 .extra2 = SYSCTL_ONE,
680 },
681 #ifdef CONFIG_NF_CONNTRACK_EVENTS
682 [NF_SYSCTL_CT_EVENTS] = {
683 .procname = "nf_conntrack_events",
684 .data = &init_net.ct.sysctl_events,
685 .maxlen = sizeof(u8),
686 .mode = 0644,
687 .proc_handler = proc_dou8vec_minmax,
688 .extra1 = SYSCTL_ZERO,
689 .extra2 = SYSCTL_TWO,
690 },
691 #endif
692 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
693 [NF_SYSCTL_CT_TIMESTAMP] = {
694 .procname = "nf_conntrack_timestamp",
695 .data = &init_net.ct.sysctl_tstamp,
696 .maxlen = sizeof(u8),
697 .mode = 0644,
698 .proc_handler = proc_dou8vec_minmax,
699 .extra1 = SYSCTL_ZERO,
700 .extra2 = SYSCTL_ONE,
701 },
702 #endif
703 [NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC] = {
704 .procname = "nf_conntrack_generic_timeout",
705 .maxlen = sizeof(unsigned int),
706 .mode = 0644,
707 .proc_handler = proc_dointvec_jiffies,
708 },
709 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT] = {
710 .procname = "nf_conntrack_tcp_timeout_syn_sent",
711 .maxlen = sizeof(unsigned int),
712 .mode = 0644,
713 .proc_handler = proc_dointvec_jiffies,
714 },
715 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV] = {
716 .procname = "nf_conntrack_tcp_timeout_syn_recv",
717 .maxlen = sizeof(unsigned int),
718 .mode = 0644,
719 .proc_handler = proc_dointvec_jiffies,
720 },
721 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED] = {
722 .procname = "nf_conntrack_tcp_timeout_established",
723 .maxlen = sizeof(unsigned int),
724 .mode = 0644,
725 .proc_handler = proc_dointvec_jiffies,
726 },
727 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT] = {
728 .procname = "nf_conntrack_tcp_timeout_fin_wait",
729 .maxlen = sizeof(unsigned int),
730 .mode = 0644,
731 .proc_handler = proc_dointvec_jiffies,
732 },
733 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT] = {
734 .procname = "nf_conntrack_tcp_timeout_close_wait",
735 .maxlen = sizeof(unsigned int),
736 .mode = 0644,
737 .proc_handler = proc_dointvec_jiffies,
738 },
739 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK] = {
740 .procname = "nf_conntrack_tcp_timeout_last_ack",
741 .maxlen = sizeof(unsigned int),
742 .mode = 0644,
743 .proc_handler = proc_dointvec_jiffies,
744 },
745 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT] = {
746 .procname = "nf_conntrack_tcp_timeout_time_wait",
747 .maxlen = sizeof(unsigned int),
748 .mode = 0644,
749 .proc_handler = proc_dointvec_jiffies,
750 },
751 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE] = {
752 .procname = "nf_conntrack_tcp_timeout_close",
753 .maxlen = sizeof(unsigned int),
754 .mode = 0644,
755 .proc_handler = proc_dointvec_jiffies,
756 },
757 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS] = {
758 .procname = "nf_conntrack_tcp_timeout_max_retrans",
759 .maxlen = sizeof(unsigned int),
760 .mode = 0644,
761 .proc_handler = proc_dointvec_jiffies,
762 },
763 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK] = {
764 .procname = "nf_conntrack_tcp_timeout_unacknowledged",
765 .maxlen = sizeof(unsigned int),
766 .mode = 0644,
767 .proc_handler = proc_dointvec_jiffies,
768 },
769 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
770 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD] = {
771 .procname = "nf_flowtable_tcp_timeout",
772 .maxlen = sizeof(unsigned int),
773 .mode = 0644,
774 .proc_handler = proc_dointvec_jiffies,
775 },
776 #endif
777 [NF_SYSCTL_CT_PROTO_TCP_LOOSE] = {
778 .procname = "nf_conntrack_tcp_loose",
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_LIBERAL] = {
786 .procname = "nf_conntrack_tcp_be_liberal",
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_IGNORE_INVALID_RST] = {
794 .procname = "nf_conntrack_tcp_ignore_invalid_rst",
795 .maxlen = sizeof(u8),
796 .mode = 0644,
797 .proc_handler = proc_dou8vec_minmax,
798 .extra1 = SYSCTL_ZERO,
799 .extra2 = SYSCTL_ONE,
800 },
801 [NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS] = {
802 .procname = "nf_conntrack_tcp_max_retrans",
803 .maxlen = sizeof(u8),
804 .mode = 0644,
805 .proc_handler = proc_dou8vec_minmax,
806 },
807 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP] = {
808 .procname = "nf_conntrack_udp_timeout",
809 .maxlen = sizeof(unsigned int),
810 .mode = 0644,
811 .proc_handler = proc_dointvec_jiffies,
812 },
813 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM] = {
814 .procname = "nf_conntrack_udp_timeout_stream",
815 .maxlen = sizeof(unsigned int),
816 .mode = 0644,
817 .proc_handler = proc_dointvec_jiffies,
818 },
819 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
820 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD] = {
821 .procname = "nf_flowtable_udp_timeout",
822 .maxlen = sizeof(unsigned int),
823 .mode = 0644,
824 .proc_handler = proc_dointvec_jiffies,
825 },
826 #endif
827 [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP] = {
828 .procname = "nf_conntrack_icmp_timeout",
829 .maxlen = sizeof(unsigned int),
830 .mode = 0644,
831 .proc_handler = proc_dointvec_jiffies,
832 },
833 [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6] = {
834 .procname = "nf_conntrack_icmpv6_timeout",
835 .maxlen = sizeof(unsigned int),
836 .mode = 0644,
837 .proc_handler = proc_dointvec_jiffies,
838 },
839 #ifdef CONFIG_NF_CT_PROTO_SCTP
840 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED] = {
841 .procname = "nf_conntrack_sctp_timeout_closed",
842 .maxlen = sizeof(unsigned int),
843 .mode = 0644,
844 .proc_handler = proc_dointvec_jiffies,
845 },
846 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT] = {
847 .procname = "nf_conntrack_sctp_timeout_cookie_wait",
848 .maxlen = sizeof(unsigned int),
849 .mode = 0644,
850 .proc_handler = proc_dointvec_jiffies,
851 },
852 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED] = {
853 .procname = "nf_conntrack_sctp_timeout_cookie_echoed",
854 .maxlen = sizeof(unsigned int),
855 .mode = 0644,
856 .proc_handler = proc_dointvec_jiffies,
857 },
858 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED] = {
859 .procname = "nf_conntrack_sctp_timeout_established",
860 .maxlen = sizeof(unsigned int),
861 .mode = 0644,
862 .proc_handler = proc_dointvec_jiffies,
863 },
864 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT] = {
865 .procname = "nf_conntrack_sctp_timeout_shutdown_sent",
866 .maxlen = sizeof(unsigned int),
867 .mode = 0644,
868 .proc_handler = proc_dointvec_jiffies,
869 },
870 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD] = {
871 .procname = "nf_conntrack_sctp_timeout_shutdown_recd",
872 .maxlen = sizeof(unsigned int),
873 .mode = 0644,
874 .proc_handler = proc_dointvec_jiffies,
875 },
876 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT] = {
877 .procname = "nf_conntrack_sctp_timeout_shutdown_ack_sent",
878 .maxlen = sizeof(unsigned int),
879 .mode = 0644,
880 .proc_handler = proc_dointvec_jiffies,
881 },
882 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT] = {
883 .procname = "nf_conntrack_sctp_timeout_heartbeat_sent",
884 .maxlen = sizeof(unsigned int),
885 .mode = 0644,
886 .proc_handler = proc_dointvec_jiffies,
887 },
888 #endif
889 #ifdef CONFIG_NF_CT_PROTO_DCCP
890 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST] = {
891 .procname = "nf_conntrack_dccp_timeout_request",
892 .maxlen = sizeof(unsigned int),
893 .mode = 0644,
894 .proc_handler = proc_dointvec_jiffies,
895 },
896 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND] = {
897 .procname = "nf_conntrack_dccp_timeout_respond",
898 .maxlen = sizeof(unsigned int),
899 .mode = 0644,
900 .proc_handler = proc_dointvec_jiffies,
901 },
902 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN] = {
903 .procname = "nf_conntrack_dccp_timeout_partopen",
904 .maxlen = sizeof(unsigned int),
905 .mode = 0644,
906 .proc_handler = proc_dointvec_jiffies,
907 },
908 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN] = {
909 .procname = "nf_conntrack_dccp_timeout_open",
910 .maxlen = sizeof(unsigned int),
911 .mode = 0644,
912 .proc_handler = proc_dointvec_jiffies,
913 },
914 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ] = {
915 .procname = "nf_conntrack_dccp_timeout_closereq",
916 .maxlen = sizeof(unsigned int),
917 .mode = 0644,
918 .proc_handler = proc_dointvec_jiffies,
919 },
920 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING] = {
921 .procname = "nf_conntrack_dccp_timeout_closing",
922 .maxlen = sizeof(unsigned int),
923 .mode = 0644,
924 .proc_handler = proc_dointvec_jiffies,
925 },
926 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT] = {
927 .procname = "nf_conntrack_dccp_timeout_timewait",
928 .maxlen = sizeof(unsigned int),
929 .mode = 0644,
930 .proc_handler = proc_dointvec_jiffies,
931 },
932 [NF_SYSCTL_CT_PROTO_DCCP_LOOSE] = {
933 .procname = "nf_conntrack_dccp_loose",
934 .maxlen = sizeof(u8),
935 .mode = 0644,
936 .proc_handler = proc_dou8vec_minmax,
937 .extra1 = SYSCTL_ZERO,
938 .extra2 = SYSCTL_ONE,
939 },
940 #endif
941 #ifdef CONFIG_NF_CT_PROTO_GRE
942 [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE] = {
943 .procname = "nf_conntrack_gre_timeout",
944 .maxlen = sizeof(unsigned int),
945 .mode = 0644,
946 .proc_handler = proc_dointvec_jiffies,
947 },
948 [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM] = {
949 .procname = "nf_conntrack_gre_timeout_stream",
950 .maxlen = sizeof(unsigned int),
951 .mode = 0644,
952 .proc_handler = proc_dointvec_jiffies,
953 },
954 #endif
955 #ifdef CONFIG_LWTUNNEL
956 [NF_SYSCTL_CT_LWTUNNEL] = {
957 .procname = "nf_hooks_lwtunnel",
958 .data = NULL,
959 .maxlen = sizeof(int),
960 .mode = 0644,
961 .proc_handler = nf_hooks_lwtunnel_sysctl_handler,
962 },
963 #endif
964 {}
965 };
966
967 static struct ctl_table nf_ct_netfilter_table[] = {
968 {
969 .procname = "nf_conntrack_max",
970 .data = &nf_conntrack_max,
971 .maxlen = sizeof(int),
972 .mode = 0644,
973 .proc_handler = proc_dointvec,
974 },
975 { }
976 };
977
nf_conntrack_standalone_init_tcp_sysctl(struct net * net,struct ctl_table * table)978 static void nf_conntrack_standalone_init_tcp_sysctl(struct net *net,
979 struct ctl_table *table)
980 {
981 struct nf_tcp_net *tn = nf_tcp_pernet(net);
982
983 #define XASSIGN(XNAME, tn) \
984 table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ ## XNAME].data = \
985 &(tn)->timeouts[TCP_CONNTRACK_ ## XNAME]
986
987 XASSIGN(SYN_SENT, tn);
988 XASSIGN(SYN_RECV, tn);
989 XASSIGN(ESTABLISHED, tn);
990 XASSIGN(FIN_WAIT, tn);
991 XASSIGN(CLOSE_WAIT, tn);
992 XASSIGN(LAST_ACK, tn);
993 XASSIGN(TIME_WAIT, tn);
994 XASSIGN(CLOSE, tn);
995 XASSIGN(RETRANS, tn);
996 XASSIGN(UNACK, tn);
997 #undef XASSIGN
998 #define XASSIGN(XNAME, rval) \
999 table[NF_SYSCTL_CT_PROTO_TCP_ ## XNAME].data = (rval)
1000
1001 XASSIGN(LOOSE, &tn->tcp_loose);
1002 XASSIGN(LIBERAL, &tn->tcp_be_liberal);
1003 XASSIGN(MAX_RETRANS, &tn->tcp_max_retrans);
1004 XASSIGN(IGNORE_INVALID_RST, &tn->tcp_ignore_invalid_rst);
1005 #undef XASSIGN
1006
1007 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
1008 table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD].data = &tn->offload_timeout;
1009 #endif
1010
1011 }
1012
nf_conntrack_standalone_init_sctp_sysctl(struct net * net,struct ctl_table * table)1013 static void nf_conntrack_standalone_init_sctp_sysctl(struct net *net,
1014 struct ctl_table *table)
1015 {
1016 #ifdef CONFIG_NF_CT_PROTO_SCTP
1017 struct nf_sctp_net *sn = nf_sctp_pernet(net);
1018
1019 #define XASSIGN(XNAME, sn) \
1020 table[NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ ## XNAME].data = \
1021 &(sn)->timeouts[SCTP_CONNTRACK_ ## XNAME]
1022
1023 XASSIGN(CLOSED, sn);
1024 XASSIGN(COOKIE_WAIT, sn);
1025 XASSIGN(COOKIE_ECHOED, sn);
1026 XASSIGN(ESTABLISHED, sn);
1027 XASSIGN(SHUTDOWN_SENT, sn);
1028 XASSIGN(SHUTDOWN_RECD, sn);
1029 XASSIGN(SHUTDOWN_ACK_SENT, sn);
1030 XASSIGN(HEARTBEAT_SENT, sn);
1031 #undef XASSIGN
1032 #endif
1033 }
1034
nf_conntrack_standalone_init_dccp_sysctl(struct net * net,struct ctl_table * table)1035 static void nf_conntrack_standalone_init_dccp_sysctl(struct net *net,
1036 struct ctl_table *table)
1037 {
1038 #ifdef CONFIG_NF_CT_PROTO_DCCP
1039 struct nf_dccp_net *dn = nf_dccp_pernet(net);
1040
1041 #define XASSIGN(XNAME, dn) \
1042 table[NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_ ## XNAME].data = \
1043 &(dn)->dccp_timeout[CT_DCCP_ ## XNAME]
1044
1045 XASSIGN(REQUEST, dn);
1046 XASSIGN(RESPOND, dn);
1047 XASSIGN(PARTOPEN, dn);
1048 XASSIGN(OPEN, dn);
1049 XASSIGN(CLOSEREQ, dn);
1050 XASSIGN(CLOSING, dn);
1051 XASSIGN(TIMEWAIT, dn);
1052 #undef XASSIGN
1053
1054 table[NF_SYSCTL_CT_PROTO_DCCP_LOOSE].data = &dn->dccp_loose;
1055 #endif
1056 }
1057
nf_conntrack_standalone_init_gre_sysctl(struct net * net,struct ctl_table * table)1058 static void nf_conntrack_standalone_init_gre_sysctl(struct net *net,
1059 struct ctl_table *table)
1060 {
1061 #ifdef CONFIG_NF_CT_PROTO_GRE
1062 struct nf_gre_net *gn = nf_gre_pernet(net);
1063
1064 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE].data = &gn->timeouts[GRE_CT_UNREPLIED];
1065 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM].data = &gn->timeouts[GRE_CT_REPLIED];
1066 #endif
1067 }
1068
nf_conntrack_standalone_init_sysctl(struct net * net)1069 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1070 {
1071 struct nf_conntrack_net *cnet = nf_ct_pernet(net);
1072 struct nf_udp_net *un = nf_udp_pernet(net);
1073 struct ctl_table *table;
1074
1075 BUILD_BUG_ON(ARRAY_SIZE(nf_ct_sysctl_table) != NF_SYSCTL_CT_LAST_SYSCTL);
1076
1077 table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table),
1078 GFP_KERNEL);
1079 if (!table)
1080 return -ENOMEM;
1081
1082 table[NF_SYSCTL_CT_COUNT].data = &cnet->count;
1083 table[NF_SYSCTL_CT_CHECKSUM].data = &net->ct.sysctl_checksum;
1084 table[NF_SYSCTL_CT_LOG_INVALID].data = &net->ct.sysctl_log_invalid;
1085 table[NF_SYSCTL_CT_ACCT].data = &net->ct.sysctl_acct;
1086 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1087 table[NF_SYSCTL_CT_EVENTS].data = &net->ct.sysctl_events;
1088 #endif
1089 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
1090 table[NF_SYSCTL_CT_TIMESTAMP].data = &net->ct.sysctl_tstamp;
1091 #endif
1092 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC].data = &nf_generic_pernet(net)->timeout;
1093 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP].data = &nf_icmp_pernet(net)->timeout;
1094 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6].data = &nf_icmpv6_pernet(net)->timeout;
1095 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP].data = &un->timeouts[UDP_CT_UNREPLIED];
1096 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM].data = &un->timeouts[UDP_CT_REPLIED];
1097 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
1098 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD].data = &un->offload_timeout;
1099 #endif
1100
1101 nf_conntrack_standalone_init_tcp_sysctl(net, table);
1102 nf_conntrack_standalone_init_sctp_sysctl(net, table);
1103 nf_conntrack_standalone_init_dccp_sysctl(net, table);
1104 nf_conntrack_standalone_init_gre_sysctl(net, table);
1105
1106 /* Don't allow non-init_net ns to alter global sysctls */
1107 if (!net_eq(&init_net, net)) {
1108 table[NF_SYSCTL_CT_MAX].mode = 0444;
1109 table[NF_SYSCTL_CT_EXPECT_MAX].mode = 0444;
1110 table[NF_SYSCTL_CT_BUCKETS].mode = 0444;
1111 }
1112
1113 cnet->sysctl_header = register_net_sysctl(net, "net/netfilter", table);
1114 if (!cnet->sysctl_header)
1115 goto out_unregister_netfilter;
1116
1117 return 0;
1118
1119 out_unregister_netfilter:
1120 kfree(table);
1121 return -ENOMEM;
1122 }
1123
nf_conntrack_standalone_fini_sysctl(struct net * net)1124 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1125 {
1126 struct nf_conntrack_net *cnet = nf_ct_pernet(net);
1127 struct ctl_table *table;
1128
1129 table = cnet->sysctl_header->ctl_table_arg;
1130 unregister_net_sysctl_table(cnet->sysctl_header);
1131 kfree(table);
1132 }
1133 #else
nf_conntrack_standalone_init_sysctl(struct net * net)1134 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1135 {
1136 return 0;
1137 }
1138
nf_conntrack_standalone_fini_sysctl(struct net * net)1139 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1140 {
1141 }
1142 #endif /* CONFIG_SYSCTL */
1143
nf_conntrack_fini_net(struct net * net)1144 static void nf_conntrack_fini_net(struct net *net)
1145 {
1146 if (enable_hooks)
1147 nf_ct_netns_put(net, NFPROTO_INET);
1148
1149 nf_conntrack_standalone_fini_proc(net);
1150 nf_conntrack_standalone_fini_sysctl(net);
1151 }
1152
nf_conntrack_pernet_init(struct net * net)1153 static int nf_conntrack_pernet_init(struct net *net)
1154 {
1155 int ret;
1156
1157 net->ct.sysctl_checksum = 1;
1158
1159 ret = nf_conntrack_standalone_init_sysctl(net);
1160 if (ret < 0)
1161 return ret;
1162
1163 ret = nf_conntrack_standalone_init_proc(net);
1164 if (ret < 0)
1165 goto out_proc;
1166
1167 ret = nf_conntrack_init_net(net);
1168 if (ret < 0)
1169 goto out_init_net;
1170
1171 if (enable_hooks) {
1172 ret = nf_ct_netns_get(net, NFPROTO_INET);
1173 if (ret < 0)
1174 goto out_hooks;
1175 }
1176
1177 return 0;
1178
1179 out_hooks:
1180 nf_conntrack_cleanup_net(net);
1181 out_init_net:
1182 nf_conntrack_standalone_fini_proc(net);
1183 out_proc:
1184 nf_conntrack_standalone_fini_sysctl(net);
1185 return ret;
1186 }
1187
nf_conntrack_pernet_exit(struct list_head * net_exit_list)1188 static void nf_conntrack_pernet_exit(struct list_head *net_exit_list)
1189 {
1190 struct net *net;
1191
1192 list_for_each_entry(net, net_exit_list, exit_list)
1193 nf_conntrack_fini_net(net);
1194
1195 nf_conntrack_cleanup_net_list(net_exit_list);
1196 }
1197
1198 static struct pernet_operations nf_conntrack_net_ops = {
1199 .init = nf_conntrack_pernet_init,
1200 .exit_batch = nf_conntrack_pernet_exit,
1201 .id = &nf_conntrack_net_id,
1202 .size = sizeof(struct nf_conntrack_net),
1203 };
1204
nf_conntrack_standalone_init(void)1205 static int __init nf_conntrack_standalone_init(void)
1206 {
1207 int ret = nf_conntrack_init_start();
1208 if (ret < 0)
1209 goto out_start;
1210
1211 BUILD_BUG_ON(NFCT_INFOMASK <= IP_CT_NUMBER);
1212
1213 #ifdef CONFIG_SYSCTL
1214 nf_ct_netfilter_header =
1215 register_net_sysctl(&init_net, "net", nf_ct_netfilter_table);
1216 if (!nf_ct_netfilter_header) {
1217 pr_err("nf_conntrack: can't register to sysctl.\n");
1218 ret = -ENOMEM;
1219 goto out_sysctl;
1220 }
1221
1222 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
1223 #endif
1224
1225 ret = register_pernet_subsys(&nf_conntrack_net_ops);
1226 if (ret < 0)
1227 goto out_pernet;
1228
1229 nf_conntrack_init_end();
1230 return 0;
1231
1232 out_pernet:
1233 #ifdef CONFIG_SYSCTL
1234 unregister_net_sysctl_table(nf_ct_netfilter_header);
1235 out_sysctl:
1236 #endif
1237 nf_conntrack_cleanup_end();
1238 out_start:
1239 return ret;
1240 }
1241
nf_conntrack_standalone_fini(void)1242 static void __exit nf_conntrack_standalone_fini(void)
1243 {
1244 nf_conntrack_cleanup_start();
1245 unregister_pernet_subsys(&nf_conntrack_net_ops);
1246 #ifdef CONFIG_SYSCTL
1247 unregister_net_sysctl_table(nf_ct_netfilter_header);
1248 #endif
1249 nf_conntrack_cleanup_end();
1250 }
1251
1252 module_init(nf_conntrack_standalone_init);
1253 module_exit(nf_conntrack_standalone_fini);
1254