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_log.h>
18 #include <net/netfilter/nf_conntrack.h>
19 #include <net/netfilter/nf_conntrack_core.h>
20 #include <net/netfilter/nf_conntrack_l4proto.h>
21 #include <net/netfilter/nf_conntrack_expect.h>
22 #include <net/netfilter/nf_conntrack_helper.h>
23 #include <net/netfilter/nf_conntrack_acct.h>
24 #include <net/netfilter/nf_conntrack_zones.h>
25 #include <net/netfilter/nf_conntrack_timestamp.h>
26 #include <linux/rculist_nulls.h>
27
28 static bool enable_hooks __read_mostly;
29 MODULE_PARM_DESC(enable_hooks, "Always enable conntrack hooks");
30 module_param(enable_hooks, bool, 0000);
31
32 unsigned int nf_conntrack_net_id __read_mostly;
33
34 #ifdef CONFIG_NF_CONNTRACK_PROCFS
35 void
print_tuple(struct seq_file * s,const struct nf_conntrack_tuple * tuple,const struct nf_conntrack_l4proto * l4proto)36 print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
37 const struct nf_conntrack_l4proto *l4proto)
38 {
39 switch (tuple->src.l3num) {
40 case NFPROTO_IPV4:
41 seq_printf(s, "src=%pI4 dst=%pI4 ",
42 &tuple->src.u3.ip, &tuple->dst.u3.ip);
43 break;
44 case NFPROTO_IPV6:
45 seq_printf(s, "src=%pI6 dst=%pI6 ",
46 tuple->src.u3.ip6, tuple->dst.u3.ip6);
47 break;
48 default:
49 break;
50 }
51
52 switch (l4proto->l4proto) {
53 case IPPROTO_ICMP:
54 seq_printf(s, "type=%u code=%u id=%u ",
55 tuple->dst.u.icmp.type,
56 tuple->dst.u.icmp.code,
57 ntohs(tuple->src.u.icmp.id));
58 break;
59 case IPPROTO_TCP:
60 seq_printf(s, "sport=%hu dport=%hu ",
61 ntohs(tuple->src.u.tcp.port),
62 ntohs(tuple->dst.u.tcp.port));
63 break;
64 case IPPROTO_UDPLITE:
65 case IPPROTO_UDP:
66 seq_printf(s, "sport=%hu dport=%hu ",
67 ntohs(tuple->src.u.udp.port),
68 ntohs(tuple->dst.u.udp.port));
69
70 break;
71 case IPPROTO_SCTP:
72 seq_printf(s, "sport=%hu dport=%hu ",
73 ntohs(tuple->src.u.sctp.port),
74 ntohs(tuple->dst.u.sctp.port));
75 break;
76 case IPPROTO_ICMPV6:
77 seq_printf(s, "type=%u code=%u id=%u ",
78 tuple->dst.u.icmp.type,
79 tuple->dst.u.icmp.code,
80 ntohs(tuple->src.u.icmp.id));
81 break;
82 case IPPROTO_GRE:
83 seq_printf(s, "srckey=0x%x dstkey=0x%x ",
84 ntohs(tuple->src.u.gre.key),
85 ntohs(tuple->dst.u.gre.key));
86 break;
87 default:
88 break;
89 }
90 }
91 EXPORT_SYMBOL_GPL(print_tuple);
92
93 struct ct_iter_state {
94 struct seq_net_private p;
95 struct hlist_nulls_head *hash;
96 unsigned int htable_size;
97 unsigned int skip_elems;
98 unsigned int bucket;
99 u_int64_t time_now;
100 };
101
ct_get_next(const struct net * net,struct ct_iter_state * st)102 static struct nf_conntrack_tuple_hash *ct_get_next(const struct net *net,
103 struct ct_iter_state *st)
104 {
105 struct nf_conntrack_tuple_hash *h;
106 struct hlist_nulls_node *n;
107 unsigned int i;
108
109 for (i = st->bucket; i < st->htable_size; i++) {
110 unsigned int skip = 0;
111
112 restart:
113 hlist_nulls_for_each_entry_rcu(h, n, &st->hash[i], hnnode) {
114 struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h);
115 struct hlist_nulls_node *tmp = n;
116
117 if (!net_eq(net, nf_ct_net(ct)))
118 continue;
119
120 if (++skip <= st->skip_elems)
121 continue;
122
123 /* h should be returned, skip to nulls marker. */
124 while (!is_a_nulls(tmp))
125 tmp = rcu_dereference(hlist_nulls_next_rcu(tmp));
126
127 /* check if h is still linked to hash[i] */
128 if (get_nulls_value(tmp) != i) {
129 skip = 0;
130 goto restart;
131 }
132
133 st->skip_elems = skip;
134 st->bucket = i;
135 return h;
136 }
137
138 skip = 0;
139 if (get_nulls_value(n) != i)
140 goto restart;
141
142 st->skip_elems = 0;
143 }
144
145 st->bucket = i;
146 return NULL;
147 }
148
ct_seq_start(struct seq_file * seq,loff_t * pos)149 static void *ct_seq_start(struct seq_file *seq, loff_t *pos)
150 __acquires(RCU)
151 {
152 struct ct_iter_state *st = seq->private;
153 struct net *net = seq_file_net(seq);
154
155 st->time_now = ktime_get_real_ns();
156 rcu_read_lock();
157
158 nf_conntrack_get_ht(&st->hash, &st->htable_size);
159
160 if (*pos == 0) {
161 st->skip_elems = 0;
162 st->bucket = 0;
163 } else if (st->skip_elems) {
164 /* resume from last dumped entry */
165 st->skip_elems--;
166 }
167
168 return ct_get_next(net, st);
169 }
170
ct_seq_next(struct seq_file * s,void * v,loff_t * pos)171 static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos)
172 {
173 struct ct_iter_state *st = s->private;
174 struct net *net = seq_file_net(s);
175
176 (*pos)++;
177 return ct_get_next(net, st);
178 }
179
ct_seq_stop(struct seq_file * s,void * v)180 static void ct_seq_stop(struct seq_file *s, void *v)
181 __releases(RCU)
182 {
183 rcu_read_unlock();
184 }
185
186 #ifdef CONFIG_NF_CONNTRACK_SECMARK
ct_show_secctx(struct seq_file * s,const struct nf_conn * ct)187 static void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
188 {
189 struct lsm_context ctx;
190 int ret;
191
192 ret = security_secid_to_secctx(ct->secmark, &ctx);
193 if (ret < 0)
194 return;
195
196 seq_printf(s, "secctx=%s ", ctx.context);
197
198 security_release_secctx(&ctx);
199 }
200 #else
ct_show_secctx(struct seq_file * s,const struct nf_conn * ct)201 static inline void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
202 {
203 }
204 #endif
205
206 #ifdef CONFIG_NF_CONNTRACK_ZONES
ct_show_zone(struct seq_file * s,const struct nf_conn * ct,int dir)207 static void ct_show_zone(struct seq_file *s, const struct nf_conn *ct,
208 int dir)
209 {
210 const struct nf_conntrack_zone *zone = nf_ct_zone(ct);
211
212 if (zone->dir != dir)
213 return;
214 switch (zone->dir) {
215 case NF_CT_DEFAULT_ZONE_DIR:
216 seq_printf(s, "zone=%u ", zone->id);
217 break;
218 case NF_CT_ZONE_DIR_ORIG:
219 seq_printf(s, "zone-orig=%u ", zone->id);
220 break;
221 case NF_CT_ZONE_DIR_REPL:
222 seq_printf(s, "zone-reply=%u ", zone->id);
223 break;
224 default:
225 break;
226 }
227 }
228 #else
ct_show_zone(struct seq_file * s,const struct nf_conn * ct,int dir)229 static inline void ct_show_zone(struct seq_file *s, const struct nf_conn *ct,
230 int dir)
231 {
232 }
233 #endif
234
235 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
ct_show_delta_time(struct seq_file * s,const struct nf_conn * ct)236 static void ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct)
237 {
238 struct ct_iter_state *st = s->private;
239 struct nf_conn_tstamp *tstamp;
240 s64 delta_time;
241
242 tstamp = nf_conn_tstamp_find(ct);
243 if (tstamp) {
244 delta_time = st->time_now - tstamp->start;
245 if (delta_time > 0)
246 delta_time = div_s64(delta_time, NSEC_PER_SEC);
247 else
248 delta_time = 0;
249
250 seq_printf(s, "delta-time=%llu ",
251 (unsigned long long)delta_time);
252 }
253 return;
254 }
255 #else
256 static inline void
ct_show_delta_time(struct seq_file * s,const struct nf_conn * ct)257 ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct)
258 {
259 }
260 #endif
261
l3proto_name(u16 proto)262 static const char* l3proto_name(u16 proto)
263 {
264 switch (proto) {
265 case AF_INET: return "ipv4";
266 case AF_INET6: return "ipv6";
267 }
268
269 return "unknown";
270 }
271
l4proto_name(u16 proto)272 static const char* l4proto_name(u16 proto)
273 {
274 switch (proto) {
275 case IPPROTO_ICMP: return "icmp";
276 case IPPROTO_TCP: return "tcp";
277 case IPPROTO_UDP: return "udp";
278 case IPPROTO_GRE: return "gre";
279 case IPPROTO_SCTP: return "sctp";
280 case IPPROTO_UDPLITE: return "udplite";
281 case IPPROTO_ICMPV6: return "icmpv6";
282 }
283
284 return "unknown";
285 }
286
287 static void
seq_print_acct(struct seq_file * s,const struct nf_conn * ct,int dir)288 seq_print_acct(struct seq_file *s, const struct nf_conn *ct, int dir)
289 {
290 struct nf_conn_acct *acct;
291 struct nf_conn_counter *counter;
292
293 acct = nf_conn_acct_find(ct);
294 if (!acct)
295 return;
296
297 counter = acct->counter;
298 seq_printf(s, "packets=%llu bytes=%llu ",
299 (unsigned long long)atomic64_read(&counter[dir].packets),
300 (unsigned long long)atomic64_read(&counter[dir].bytes));
301 }
302
303 /* return 0 on success, 1 in case of error */
ct_seq_show(struct seq_file * s,void * v)304 static int ct_seq_show(struct seq_file *s, void *v)
305 {
306 struct nf_conntrack_tuple_hash *hash = v;
307 struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
308 const struct nf_conntrack_l4proto *l4proto;
309 struct net *net = seq_file_net(s);
310 int ret = 0;
311
312 WARN_ON(!ct);
313 if (unlikely(!refcount_inc_not_zero(&ct->ct_general.use)))
314 return 0;
315
316 /* load ->status after refcount increase */
317 smp_acquire__after_ctrl_dep();
318
319 if (nf_ct_should_gc(ct)) {
320 nf_ct_kill(ct);
321 goto release;
322 }
323
324 /* we only want to print DIR_ORIGINAL */
325 if (NF_CT_DIRECTION(hash))
326 goto release;
327
328 if (!net_eq(nf_ct_net(ct), net))
329 goto release;
330
331 l4proto = nf_ct_l4proto_find(nf_ct_protonum(ct));
332
333 ret = -ENOSPC;
334 seq_printf(s, "%-8s %u %-8s %u ",
335 l3proto_name(nf_ct_l3num(ct)), nf_ct_l3num(ct),
336 l4proto_name(l4proto->l4proto), nf_ct_protonum(ct));
337
338 if (!test_bit(IPS_OFFLOAD_BIT, &ct->status))
339 seq_printf(s, "%ld ", nf_ct_expires(ct) / HZ);
340
341 if (l4proto->print_conntrack)
342 l4proto->print_conntrack(s, ct);
343
344 print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
345 l4proto);
346
347 ct_show_zone(s, ct, NF_CT_ZONE_DIR_ORIG);
348
349 if (seq_has_overflowed(s))
350 goto release;
351
352 seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL);
353
354 if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
355 seq_puts(s, "[UNREPLIED] ");
356
357 print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, l4proto);
358
359 ct_show_zone(s, ct, NF_CT_ZONE_DIR_REPL);
360
361 seq_print_acct(s, ct, IP_CT_DIR_REPLY);
362
363 if (test_bit(IPS_HW_OFFLOAD_BIT, &ct->status))
364 seq_puts(s, "[HW_OFFLOAD] ");
365 else if (test_bit(IPS_OFFLOAD_BIT, &ct->status))
366 seq_puts(s, "[OFFLOAD] ");
367 else if (test_bit(IPS_ASSURED_BIT, &ct->status))
368 seq_puts(s, "[ASSURED] ");
369
370 if (seq_has_overflowed(s))
371 goto release;
372
373 #if defined(CONFIG_NF_CONNTRACK_MARK)
374 seq_printf(s, "mark=%u ", READ_ONCE(ct->mark));
375 #endif
376
377 ct_show_secctx(s, ct);
378 ct_show_zone(s, ct, NF_CT_DEFAULT_ZONE_DIR);
379 ct_show_delta_time(s, ct);
380
381 seq_printf(s, "use=%u\n", refcount_read(&ct->ct_general.use));
382
383 if (seq_has_overflowed(s))
384 goto release;
385
386 ret = 0;
387 release:
388 nf_ct_put(ct);
389 return ret;
390 }
391
392 static const struct seq_operations ct_seq_ops = {
393 .start = ct_seq_start,
394 .next = ct_seq_next,
395 .stop = ct_seq_stop,
396 .show = ct_seq_show
397 };
398
ct_cpu_seq_start(struct seq_file * seq,loff_t * pos)399 static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
400 {
401 struct net *net = seq_file_net(seq);
402 int cpu;
403
404 if (*pos == 0)
405 return SEQ_START_TOKEN;
406
407 for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) {
408 if (!cpu_possible(cpu))
409 continue;
410 *pos = cpu + 1;
411 return per_cpu_ptr(net->ct.stat, cpu);
412 }
413
414 return NULL;
415 }
416
ct_cpu_seq_next(struct seq_file * seq,void * v,loff_t * pos)417 static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
418 {
419 struct net *net = seq_file_net(seq);
420 int cpu;
421
422 for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) {
423 if (!cpu_possible(cpu))
424 continue;
425 *pos = cpu + 1;
426 return per_cpu_ptr(net->ct.stat, cpu);
427 }
428 (*pos)++;
429 return NULL;
430 }
431
ct_cpu_seq_stop(struct seq_file * seq,void * v)432 static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
433 {
434 }
435
ct_cpu_seq_show(struct seq_file * seq,void * v)436 static int ct_cpu_seq_show(struct seq_file *seq, void *v)
437 {
438 struct net *net = seq_file_net(seq);
439 const struct ip_conntrack_stat *st = v;
440 unsigned int nr_conntracks;
441
442 if (v == SEQ_START_TOKEN) {
443 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");
444 return 0;
445 }
446
447 nr_conntracks = nf_conntrack_count(net);
448
449 seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
450 "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n",
451 nr_conntracks,
452 st->clash_resolve,
453 st->found,
454 0,
455 st->invalid,
456 0,
457 0,
458 st->chaintoolong,
459 st->insert,
460 st->insert_failed,
461 st->drop,
462 st->early_drop,
463 st->error,
464
465 st->expect_new,
466 st->expect_create,
467 st->expect_delete,
468 st->search_restart
469 );
470 return 0;
471 }
472
473 static const struct seq_operations ct_cpu_seq_ops = {
474 .start = ct_cpu_seq_start,
475 .next = ct_cpu_seq_next,
476 .stop = ct_cpu_seq_stop,
477 .show = ct_cpu_seq_show,
478 };
479
nf_conntrack_standalone_init_proc(struct net * net)480 static int nf_conntrack_standalone_init_proc(struct net *net)
481 {
482 struct proc_dir_entry *pde;
483 kuid_t root_uid;
484 kgid_t root_gid;
485
486 pde = proc_create_net("nf_conntrack", 0440, net->proc_net, &ct_seq_ops,
487 sizeof(struct ct_iter_state));
488 if (!pde)
489 goto out_nf_conntrack;
490
491 root_uid = make_kuid(net->user_ns, 0);
492 root_gid = make_kgid(net->user_ns, 0);
493 if (uid_valid(root_uid) && gid_valid(root_gid))
494 proc_set_user(pde, root_uid, root_gid);
495
496 pde = proc_create_net("nf_conntrack", 0444, net->proc_net_stat,
497 &ct_cpu_seq_ops, sizeof(struct seq_net_private));
498 if (!pde)
499 goto out_stat_nf_conntrack;
500 return 0;
501
502 out_stat_nf_conntrack:
503 remove_proc_entry("nf_conntrack", net->proc_net);
504 out_nf_conntrack:
505 return -ENOMEM;
506 }
507
nf_conntrack_standalone_fini_proc(struct net * net)508 static void nf_conntrack_standalone_fini_proc(struct net *net)
509 {
510 remove_proc_entry("nf_conntrack", net->proc_net_stat);
511 remove_proc_entry("nf_conntrack", net->proc_net);
512 }
513 #else
nf_conntrack_standalone_init_proc(struct net * net)514 static int nf_conntrack_standalone_init_proc(struct net *net)
515 {
516 return 0;
517 }
518
nf_conntrack_standalone_fini_proc(struct net * net)519 static void nf_conntrack_standalone_fini_proc(struct net *net)
520 {
521 }
522 #endif /* CONFIG_NF_CONNTRACK_PROCFS */
523
nf_conntrack_count(const struct net * net)524 u32 nf_conntrack_count(const struct net *net)
525 {
526 const struct nf_conntrack_net *cnet = nf_ct_pernet(net);
527
528 return atomic_read(&cnet->count);
529 }
530 EXPORT_SYMBOL_GPL(nf_conntrack_count);
531
532 /* Sysctl support */
533
534 #ifdef CONFIG_SYSCTL
535 /* size the user *wants to set */
536 static unsigned int nf_conntrack_htable_size_user __read_mostly;
537
538 static int
nf_conntrack_hash_sysctl(const struct ctl_table * table,int write,void * buffer,size_t * lenp,loff_t * ppos)539 nf_conntrack_hash_sysctl(const struct ctl_table *table, int write,
540 void *buffer, size_t *lenp, loff_t *ppos)
541 {
542 int ret;
543
544 /* module_param hashsize could have changed value */
545 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
546
547 ret = proc_dointvec(table, write, buffer, lenp, ppos);
548 if (ret < 0 || !write)
549 return ret;
550
551 /* update ret, we might not be able to satisfy request */
552 ret = nf_conntrack_hash_resize(nf_conntrack_htable_size_user);
553
554 /* update it to the actual value used by conntrack */
555 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
556 return ret;
557 }
558
559 static int
nf_conntrack_log_invalid_sysctl(const struct ctl_table * table,int write,void * buffer,size_t * lenp,loff_t * ppos)560 nf_conntrack_log_invalid_sysctl(const struct ctl_table *table, int write,
561 void *buffer, size_t *lenp, loff_t *ppos)
562 {
563 int ret, i;
564
565 ret = proc_dou8vec_minmax(table, write, buffer, lenp, ppos);
566 if (ret < 0 || !write)
567 return ret;
568
569 if (*(u8 *)table->data == 0)
570 return ret;
571
572 /* Load nf_log_syslog only if no logger is currently registered */
573 for (i = 0; i < NFPROTO_NUMPROTO; i++) {
574 if (nf_log_is_registered(i))
575 return ret;
576 }
577 request_module("%s", "nf_log_syslog");
578
579 return ret;
580 }
581
582 static struct ctl_table_header *nf_ct_netfilter_header;
583
584 enum nf_ct_sysctl_index {
585 NF_SYSCTL_CT_MAX,
586 NF_SYSCTL_CT_COUNT,
587 NF_SYSCTL_CT_BUCKETS,
588 NF_SYSCTL_CT_CHECKSUM,
589 NF_SYSCTL_CT_LOG_INVALID,
590 NF_SYSCTL_CT_EXPECT_MAX,
591 NF_SYSCTL_CT_ACCT,
592 #ifdef CONFIG_NF_CONNTRACK_EVENTS
593 NF_SYSCTL_CT_EVENTS,
594 #endif
595 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
596 NF_SYSCTL_CT_TIMESTAMP,
597 #endif
598 NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC,
599 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT,
600 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV,
601 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED,
602 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT,
603 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT,
604 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK,
605 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT,
606 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE,
607 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS,
608 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK,
609 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
610 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD,
611 #endif
612 NF_SYSCTL_CT_PROTO_TCP_LOOSE,
613 NF_SYSCTL_CT_PROTO_TCP_LIBERAL,
614 NF_SYSCTL_CT_PROTO_TCP_IGNORE_INVALID_RST,
615 NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS,
616 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP,
617 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM,
618 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
619 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD,
620 #endif
621 NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP,
622 NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6,
623 #ifdef CONFIG_NF_CT_PROTO_SCTP
624 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED,
625 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT,
626 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED,
627 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED,
628 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT,
629 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD,
630 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT,
631 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT,
632 #endif
633 #ifdef CONFIG_NF_CT_PROTO_GRE
634 NF_SYSCTL_CT_PROTO_TIMEOUT_GRE,
635 NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM,
636 #endif
637
638 NF_SYSCTL_CT_LAST_SYSCTL,
639 };
640
641 static struct ctl_table nf_ct_sysctl_table[] = {
642 [NF_SYSCTL_CT_MAX] = {
643 .procname = "nf_conntrack_max",
644 .data = &nf_conntrack_max,
645 .maxlen = sizeof(int),
646 .mode = 0644,
647 .proc_handler = proc_dointvec_minmax,
648 .extra1 = SYSCTL_ZERO,
649 .extra2 = SYSCTL_INT_MAX,
650 },
651 [NF_SYSCTL_CT_COUNT] = {
652 .procname = "nf_conntrack_count",
653 .maxlen = sizeof(int),
654 .mode = 0444,
655 .proc_handler = proc_dointvec,
656 },
657 [NF_SYSCTL_CT_BUCKETS] = {
658 .procname = "nf_conntrack_buckets",
659 .data = &nf_conntrack_htable_size_user,
660 .maxlen = sizeof(unsigned int),
661 .mode = 0644,
662 .proc_handler = nf_conntrack_hash_sysctl,
663 },
664 [NF_SYSCTL_CT_CHECKSUM] = {
665 .procname = "nf_conntrack_checksum",
666 .data = &init_net.ct.sysctl_checksum,
667 .maxlen = sizeof(u8),
668 .mode = 0644,
669 .proc_handler = proc_dou8vec_minmax,
670 .extra1 = SYSCTL_ZERO,
671 .extra2 = SYSCTL_ONE,
672 },
673 [NF_SYSCTL_CT_LOG_INVALID] = {
674 .procname = "nf_conntrack_log_invalid",
675 .data = &init_net.ct.sysctl_log_invalid,
676 .maxlen = sizeof(u8),
677 .mode = 0644,
678 .proc_handler = nf_conntrack_log_invalid_sysctl,
679 },
680 [NF_SYSCTL_CT_EXPECT_MAX] = {
681 .procname = "nf_conntrack_expect_max",
682 .data = &nf_ct_expect_max,
683 .maxlen = sizeof(int),
684 .mode = 0644,
685 .proc_handler = proc_dointvec_minmax,
686 .extra1 = SYSCTL_ONE,
687 .extra2 = SYSCTL_INT_MAX,
688 },
689 [NF_SYSCTL_CT_ACCT] = {
690 .procname = "nf_conntrack_acct",
691 .data = &init_net.ct.sysctl_acct,
692 .maxlen = sizeof(u8),
693 .mode = 0644,
694 .proc_handler = proc_dou8vec_minmax,
695 .extra1 = SYSCTL_ZERO,
696 .extra2 = SYSCTL_ONE,
697 },
698 #ifdef CONFIG_NF_CONNTRACK_EVENTS
699 [NF_SYSCTL_CT_EVENTS] = {
700 .procname = "nf_conntrack_events",
701 .data = &init_net.ct.sysctl_events,
702 .maxlen = sizeof(u8),
703 .mode = 0644,
704 .proc_handler = proc_dou8vec_minmax,
705 .extra1 = SYSCTL_ZERO,
706 .extra2 = SYSCTL_TWO,
707 },
708 #endif
709 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
710 [NF_SYSCTL_CT_TIMESTAMP] = {
711 .procname = "nf_conntrack_timestamp",
712 .data = &init_net.ct.sysctl_tstamp,
713 .maxlen = sizeof(u8),
714 .mode = 0644,
715 .proc_handler = proc_dou8vec_minmax,
716 .extra1 = SYSCTL_ZERO,
717 .extra2 = SYSCTL_ONE,
718 },
719 #endif
720 [NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC] = {
721 .procname = "nf_conntrack_generic_timeout",
722 .maxlen = sizeof(unsigned int),
723 .mode = 0644,
724 .proc_handler = proc_dointvec_jiffies,
725 },
726 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT] = {
727 .procname = "nf_conntrack_tcp_timeout_syn_sent",
728 .maxlen = sizeof(unsigned int),
729 .mode = 0644,
730 .proc_handler = proc_dointvec_jiffies,
731 },
732 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV] = {
733 .procname = "nf_conntrack_tcp_timeout_syn_recv",
734 .maxlen = sizeof(unsigned int),
735 .mode = 0644,
736 .proc_handler = proc_dointvec_jiffies,
737 },
738 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED] = {
739 .procname = "nf_conntrack_tcp_timeout_established",
740 .maxlen = sizeof(unsigned int),
741 .mode = 0644,
742 .proc_handler = proc_dointvec_jiffies,
743 },
744 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT] = {
745 .procname = "nf_conntrack_tcp_timeout_fin_wait",
746 .maxlen = sizeof(unsigned int),
747 .mode = 0644,
748 .proc_handler = proc_dointvec_jiffies,
749 },
750 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT] = {
751 .procname = "nf_conntrack_tcp_timeout_close_wait",
752 .maxlen = sizeof(unsigned int),
753 .mode = 0644,
754 .proc_handler = proc_dointvec_jiffies,
755 },
756 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK] = {
757 .procname = "nf_conntrack_tcp_timeout_last_ack",
758 .maxlen = sizeof(unsigned int),
759 .mode = 0644,
760 .proc_handler = proc_dointvec_jiffies,
761 },
762 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT] = {
763 .procname = "nf_conntrack_tcp_timeout_time_wait",
764 .maxlen = sizeof(unsigned int),
765 .mode = 0644,
766 .proc_handler = proc_dointvec_jiffies,
767 },
768 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE] = {
769 .procname = "nf_conntrack_tcp_timeout_close",
770 .maxlen = sizeof(unsigned int),
771 .mode = 0644,
772 .proc_handler = proc_dointvec_jiffies,
773 },
774 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS] = {
775 .procname = "nf_conntrack_tcp_timeout_max_retrans",
776 .maxlen = sizeof(unsigned int),
777 .mode = 0644,
778 .proc_handler = proc_dointvec_jiffies,
779 },
780 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK] = {
781 .procname = "nf_conntrack_tcp_timeout_unacknowledged",
782 .maxlen = sizeof(unsigned int),
783 .mode = 0644,
784 .proc_handler = proc_dointvec_jiffies,
785 },
786 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
787 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD] = {
788 .procname = "nf_flowtable_tcp_timeout",
789 .maxlen = sizeof(unsigned int),
790 .mode = 0644,
791 .proc_handler = proc_dointvec_jiffies,
792 },
793 #endif
794 [NF_SYSCTL_CT_PROTO_TCP_LOOSE] = {
795 .procname = "nf_conntrack_tcp_loose",
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_LIBERAL] = {
803 .procname = "nf_conntrack_tcp_be_liberal",
804 .maxlen = sizeof(u8),
805 .mode = 0644,
806 .proc_handler = proc_dou8vec_minmax,
807 .extra1 = SYSCTL_ZERO,
808 .extra2 = SYSCTL_ONE,
809 },
810 [NF_SYSCTL_CT_PROTO_TCP_IGNORE_INVALID_RST] = {
811 .procname = "nf_conntrack_tcp_ignore_invalid_rst",
812 .maxlen = sizeof(u8),
813 .mode = 0644,
814 .proc_handler = proc_dou8vec_minmax,
815 .extra1 = SYSCTL_ZERO,
816 .extra2 = SYSCTL_ONE,
817 },
818 [NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS] = {
819 .procname = "nf_conntrack_tcp_max_retrans",
820 .maxlen = sizeof(u8),
821 .mode = 0644,
822 .proc_handler = proc_dou8vec_minmax,
823 },
824 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP] = {
825 .procname = "nf_conntrack_udp_timeout",
826 .maxlen = sizeof(unsigned int),
827 .mode = 0644,
828 .proc_handler = proc_dointvec_jiffies,
829 },
830 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM] = {
831 .procname = "nf_conntrack_udp_timeout_stream",
832 .maxlen = sizeof(unsigned int),
833 .mode = 0644,
834 .proc_handler = proc_dointvec_jiffies,
835 },
836 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
837 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD] = {
838 .procname = "nf_flowtable_udp_timeout",
839 .maxlen = sizeof(unsigned int),
840 .mode = 0644,
841 .proc_handler = proc_dointvec_jiffies,
842 },
843 #endif
844 [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP] = {
845 .procname = "nf_conntrack_icmp_timeout",
846 .maxlen = sizeof(unsigned int),
847 .mode = 0644,
848 .proc_handler = proc_dointvec_jiffies,
849 },
850 [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6] = {
851 .procname = "nf_conntrack_icmpv6_timeout",
852 .maxlen = sizeof(unsigned int),
853 .mode = 0644,
854 .proc_handler = proc_dointvec_jiffies,
855 },
856 #ifdef CONFIG_NF_CT_PROTO_SCTP
857 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED] = {
858 .procname = "nf_conntrack_sctp_timeout_closed",
859 .maxlen = sizeof(unsigned int),
860 .mode = 0644,
861 .proc_handler = proc_dointvec_jiffies,
862 },
863 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT] = {
864 .procname = "nf_conntrack_sctp_timeout_cookie_wait",
865 .maxlen = sizeof(unsigned int),
866 .mode = 0644,
867 .proc_handler = proc_dointvec_jiffies,
868 },
869 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED] = {
870 .procname = "nf_conntrack_sctp_timeout_cookie_echoed",
871 .maxlen = sizeof(unsigned int),
872 .mode = 0644,
873 .proc_handler = proc_dointvec_jiffies,
874 },
875 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED] = {
876 .procname = "nf_conntrack_sctp_timeout_established",
877 .maxlen = sizeof(unsigned int),
878 .mode = 0644,
879 .proc_handler = proc_dointvec_jiffies,
880 },
881 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT] = {
882 .procname = "nf_conntrack_sctp_timeout_shutdown_sent",
883 .maxlen = sizeof(unsigned int),
884 .mode = 0644,
885 .proc_handler = proc_dointvec_jiffies,
886 },
887 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD] = {
888 .procname = "nf_conntrack_sctp_timeout_shutdown_recd",
889 .maxlen = sizeof(unsigned int),
890 .mode = 0644,
891 .proc_handler = proc_dointvec_jiffies,
892 },
893 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT] = {
894 .procname = "nf_conntrack_sctp_timeout_shutdown_ack_sent",
895 .maxlen = sizeof(unsigned int),
896 .mode = 0644,
897 .proc_handler = proc_dointvec_jiffies,
898 },
899 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT] = {
900 .procname = "nf_conntrack_sctp_timeout_heartbeat_sent",
901 .maxlen = sizeof(unsigned int),
902 .mode = 0644,
903 .proc_handler = proc_dointvec_jiffies,
904 },
905 #endif
906 #ifdef CONFIG_NF_CT_PROTO_GRE
907 [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE] = {
908 .procname = "nf_conntrack_gre_timeout",
909 .maxlen = sizeof(unsigned int),
910 .mode = 0644,
911 .proc_handler = proc_dointvec_jiffies,
912 },
913 [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM] = {
914 .procname = "nf_conntrack_gre_timeout_stream",
915 .maxlen = sizeof(unsigned int),
916 .mode = 0644,
917 .proc_handler = proc_dointvec_jiffies,
918 },
919 #endif
920 };
921
922 static struct ctl_table nf_ct_netfilter_table[] = {
923 {
924 .procname = "nf_conntrack_max",
925 .data = &nf_conntrack_max,
926 .maxlen = sizeof(int),
927 .mode = 0644,
928 .proc_handler = proc_dointvec_minmax,
929 .extra1 = SYSCTL_ZERO,
930 .extra2 = SYSCTL_INT_MAX,
931 },
932 };
933
nf_conntrack_standalone_init_tcp_sysctl(struct net * net,struct ctl_table * table)934 static void nf_conntrack_standalone_init_tcp_sysctl(struct net *net,
935 struct ctl_table *table)
936 {
937 struct nf_tcp_net *tn = nf_tcp_pernet(net);
938
939 #define XASSIGN(XNAME, tn) \
940 table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ ## XNAME].data = \
941 &(tn)->timeouts[TCP_CONNTRACK_ ## XNAME]
942
943 XASSIGN(SYN_SENT, tn);
944 XASSIGN(SYN_RECV, tn);
945 XASSIGN(ESTABLISHED, tn);
946 XASSIGN(FIN_WAIT, tn);
947 XASSIGN(CLOSE_WAIT, tn);
948 XASSIGN(LAST_ACK, tn);
949 XASSIGN(TIME_WAIT, tn);
950 XASSIGN(CLOSE, tn);
951 XASSIGN(RETRANS, tn);
952 XASSIGN(UNACK, tn);
953 #undef XASSIGN
954 #define XASSIGN(XNAME, rval) \
955 table[NF_SYSCTL_CT_PROTO_TCP_ ## XNAME].data = (rval)
956
957 XASSIGN(LOOSE, &tn->tcp_loose);
958 XASSIGN(LIBERAL, &tn->tcp_be_liberal);
959 XASSIGN(MAX_RETRANS, &tn->tcp_max_retrans);
960 XASSIGN(IGNORE_INVALID_RST, &tn->tcp_ignore_invalid_rst);
961 #undef XASSIGN
962
963 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
964 table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD].data = &tn->offload_timeout;
965 #endif
966
967 }
968
nf_conntrack_standalone_init_sctp_sysctl(struct net * net,struct ctl_table * table)969 static void nf_conntrack_standalone_init_sctp_sysctl(struct net *net,
970 struct ctl_table *table)
971 {
972 #ifdef CONFIG_NF_CT_PROTO_SCTP
973 struct nf_sctp_net *sn = nf_sctp_pernet(net);
974
975 #define XASSIGN(XNAME, sn) \
976 table[NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ ## XNAME].data = \
977 &(sn)->timeouts[SCTP_CONNTRACK_ ## XNAME]
978
979 XASSIGN(CLOSED, sn);
980 XASSIGN(COOKIE_WAIT, sn);
981 XASSIGN(COOKIE_ECHOED, sn);
982 XASSIGN(ESTABLISHED, sn);
983 XASSIGN(SHUTDOWN_SENT, sn);
984 XASSIGN(SHUTDOWN_RECD, sn);
985 XASSIGN(SHUTDOWN_ACK_SENT, sn);
986 XASSIGN(HEARTBEAT_SENT, sn);
987 #undef XASSIGN
988 #endif
989 }
990
nf_conntrack_standalone_init_gre_sysctl(struct net * net,struct ctl_table * table)991 static void nf_conntrack_standalone_init_gre_sysctl(struct net *net,
992 struct ctl_table *table)
993 {
994 #ifdef CONFIG_NF_CT_PROTO_GRE
995 struct nf_gre_net *gn = nf_gre_pernet(net);
996
997 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE].data = &gn->timeouts[GRE_CT_UNREPLIED];
998 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM].data = &gn->timeouts[GRE_CT_REPLIED];
999 #endif
1000 }
1001
nf_conntrack_standalone_init_sysctl(struct net * net)1002 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1003 {
1004 struct nf_conntrack_net *cnet = nf_ct_pernet(net);
1005 struct nf_udp_net *un = nf_udp_pernet(net);
1006 struct ctl_table *table;
1007
1008 BUILD_BUG_ON(ARRAY_SIZE(nf_ct_sysctl_table) != NF_SYSCTL_CT_LAST_SYSCTL);
1009
1010 table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table),
1011 GFP_KERNEL);
1012 if (!table)
1013 return -ENOMEM;
1014
1015 table[NF_SYSCTL_CT_COUNT].data = &cnet->count;
1016 table[NF_SYSCTL_CT_CHECKSUM].data = &net->ct.sysctl_checksum;
1017 table[NF_SYSCTL_CT_LOG_INVALID].data = &net->ct.sysctl_log_invalid;
1018 table[NF_SYSCTL_CT_ACCT].data = &net->ct.sysctl_acct;
1019 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1020 table[NF_SYSCTL_CT_EVENTS].data = &net->ct.sysctl_events;
1021 #endif
1022 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
1023 table[NF_SYSCTL_CT_TIMESTAMP].data = &net->ct.sysctl_tstamp;
1024 #endif
1025 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC].data = &nf_generic_pernet(net)->timeout;
1026 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP].data = &nf_icmp_pernet(net)->timeout;
1027 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6].data = &nf_icmpv6_pernet(net)->timeout;
1028 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP].data = &un->timeouts[UDP_CT_UNREPLIED];
1029 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM].data = &un->timeouts[UDP_CT_REPLIED];
1030 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
1031 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD].data = &un->offload_timeout;
1032 #endif
1033
1034 nf_conntrack_standalone_init_tcp_sysctl(net, table);
1035 nf_conntrack_standalone_init_sctp_sysctl(net, table);
1036 nf_conntrack_standalone_init_gre_sysctl(net, table);
1037
1038 /* Don't allow non-init_net ns to alter global sysctls */
1039 if (!net_eq(&init_net, net)) {
1040 table[NF_SYSCTL_CT_MAX].mode = 0444;
1041 table[NF_SYSCTL_CT_EXPECT_MAX].mode = 0444;
1042 table[NF_SYSCTL_CT_BUCKETS].mode = 0444;
1043 }
1044
1045 cnet->sysctl_header = register_net_sysctl_sz(net, "net/netfilter",
1046 table,
1047 ARRAY_SIZE(nf_ct_sysctl_table));
1048 if (!cnet->sysctl_header)
1049 goto out_unregister_netfilter;
1050
1051 return 0;
1052
1053 out_unregister_netfilter:
1054 kfree(table);
1055 return -ENOMEM;
1056 }
1057
nf_conntrack_standalone_fini_sysctl(struct net * net)1058 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1059 {
1060 struct nf_conntrack_net *cnet = nf_ct_pernet(net);
1061 const struct ctl_table *table;
1062
1063 table = cnet->sysctl_header->ctl_table_arg;
1064 unregister_net_sysctl_table(cnet->sysctl_header);
1065 kfree(table);
1066 }
1067 #else
nf_conntrack_standalone_init_sysctl(struct net * net)1068 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1069 {
1070 return 0;
1071 }
1072
nf_conntrack_standalone_fini_sysctl(struct net * net)1073 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1074 {
1075 }
1076 #endif /* CONFIG_SYSCTL */
1077
nf_conntrack_fini_net(struct net * net)1078 static void nf_conntrack_fini_net(struct net *net)
1079 {
1080 if (enable_hooks)
1081 nf_ct_netns_put(net, NFPROTO_INET);
1082
1083 nf_conntrack_standalone_fini_proc(net);
1084 nf_conntrack_standalone_fini_sysctl(net);
1085 }
1086
nf_conntrack_pernet_init(struct net * net)1087 static int nf_conntrack_pernet_init(struct net *net)
1088 {
1089 int ret;
1090
1091 net->ct.sysctl_checksum = 1;
1092
1093 ret = nf_conntrack_standalone_init_sysctl(net);
1094 if (ret < 0)
1095 return ret;
1096
1097 ret = nf_conntrack_standalone_init_proc(net);
1098 if (ret < 0)
1099 goto out_proc;
1100
1101 ret = nf_conntrack_init_net(net);
1102 if (ret < 0)
1103 goto out_init_net;
1104
1105 if (enable_hooks) {
1106 ret = nf_ct_netns_get(net, NFPROTO_INET);
1107 if (ret < 0)
1108 goto out_hooks;
1109 }
1110
1111 return 0;
1112
1113 out_hooks:
1114 nf_conntrack_cleanup_net(net);
1115 out_init_net:
1116 nf_conntrack_standalone_fini_proc(net);
1117 out_proc:
1118 nf_conntrack_standalone_fini_sysctl(net);
1119 return ret;
1120 }
1121
nf_conntrack_pernet_exit(struct list_head * net_exit_list)1122 static void nf_conntrack_pernet_exit(struct list_head *net_exit_list)
1123 {
1124 struct net *net;
1125
1126 list_for_each_entry(net, net_exit_list, exit_list)
1127 nf_conntrack_fini_net(net);
1128
1129 nf_conntrack_cleanup_net_list(net_exit_list);
1130 }
1131
1132 static struct pernet_operations nf_conntrack_net_ops = {
1133 .init = nf_conntrack_pernet_init,
1134 .exit_batch = nf_conntrack_pernet_exit,
1135 .id = &nf_conntrack_net_id,
1136 .size = sizeof(struct nf_conntrack_net),
1137 };
1138
nf_conntrack_standalone_init(void)1139 static int __init nf_conntrack_standalone_init(void)
1140 {
1141 int ret = nf_conntrack_init_start();
1142 if (ret < 0)
1143 goto out_start;
1144
1145 BUILD_BUG_ON(NFCT_INFOMASK <= IP_CT_NUMBER);
1146
1147 #ifdef CONFIG_SYSCTL
1148 nf_ct_netfilter_header =
1149 register_net_sysctl(&init_net, "net", nf_ct_netfilter_table);
1150 if (!nf_ct_netfilter_header) {
1151 pr_err("nf_conntrack: can't register to sysctl.\n");
1152 ret = -ENOMEM;
1153 goto out_sysctl;
1154 }
1155
1156 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
1157 #endif
1158
1159 nf_conntrack_init_end();
1160
1161 ret = register_pernet_subsys(&nf_conntrack_net_ops);
1162 if (ret < 0)
1163 goto out_pernet;
1164
1165 return 0;
1166
1167 out_pernet:
1168 #ifdef CONFIG_SYSCTL
1169 unregister_net_sysctl_table(nf_ct_netfilter_header);
1170 out_sysctl:
1171 #endif
1172 nf_conntrack_cleanup_end();
1173 out_start:
1174 return ret;
1175 }
1176
nf_conntrack_standalone_fini(void)1177 static void __exit nf_conntrack_standalone_fini(void)
1178 {
1179 nf_conntrack_cleanup_start();
1180 unregister_pernet_subsys(&nf_conntrack_net_ops);
1181 #ifdef CONFIG_SYSCTL
1182 unregister_net_sysctl_table(nf_ct_netfilter_header);
1183 #endif
1184 nf_conntrack_cleanup_end();
1185 }
1186
1187 module_init(nf_conntrack_standalone_init);
1188 module_exit(nf_conntrack_standalone_fini);
1189