1 // SPDX-License-Identifier: GPL-2.0
2 #include <linux/types.h>
3 #include <linux/netfilter.h>
4 #include <linux/slab.h>
5 #include <linux/module.h>
6 #include <linux/skbuff.h>
7 #include <linux/proc_fs.h>
8 #include <linux/seq_file.h>
9 #include <linux/percpu.h>
10 #include <linux/netdevice.h>
11 #include <linux/security.h>
12 #include <net/net_namespace.h>
13 #ifdef CONFIG_SYSCTL
14 #include <linux/sysctl.h>
15 #endif
16
17 #include <net/netfilter/nf_conntrack.h>
18 #include <net/netfilter/nf_conntrack_core.h>
19 #include <net/netfilter/nf_conntrack_l4proto.h>
20 #include <net/netfilter/nf_conntrack_expect.h>
21 #include <net/netfilter/nf_conntrack_helper.h>
22 #include <net/netfilter/nf_conntrack_acct.h>
23 #include <net/netfilter/nf_conntrack_zones.h>
24 #include <net/netfilter/nf_conntrack_timestamp.h>
25 #include <linux/rculist_nulls.h>
26
27 static bool enable_hooks __read_mostly;
28 MODULE_PARM_DESC(enable_hooks, "Always enable conntrack hooks");
29 module_param(enable_hooks, bool, 0000);
30
31 unsigned int nf_conntrack_net_id __read_mostly;
32
33 #ifdef CONFIG_NF_CONNTRACK_PROCFS
34 void
print_tuple(struct seq_file * s,const struct nf_conntrack_tuple * tuple,const struct nf_conntrack_l4proto * l4proto)35 print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
36 const struct nf_conntrack_l4proto *l4proto)
37 {
38 switch (tuple->src.l3num) {
39 case NFPROTO_IPV4:
40 seq_printf(s, "src=%pI4 dst=%pI4 ",
41 &tuple->src.u3.ip, &tuple->dst.u3.ip);
42 break;
43 case NFPROTO_IPV6:
44 seq_printf(s, "src=%pI6 dst=%pI6 ",
45 tuple->src.u3.ip6, tuple->dst.u3.ip6);
46 break;
47 default:
48 break;
49 }
50
51 switch (l4proto->l4proto) {
52 case IPPROTO_ICMP:
53 seq_printf(s, "type=%u code=%u id=%u ",
54 tuple->dst.u.icmp.type,
55 tuple->dst.u.icmp.code,
56 ntohs(tuple->src.u.icmp.id));
57 break;
58 case IPPROTO_TCP:
59 seq_printf(s, "sport=%hu dport=%hu ",
60 ntohs(tuple->src.u.tcp.port),
61 ntohs(tuple->dst.u.tcp.port));
62 break;
63 case IPPROTO_UDPLITE:
64 case IPPROTO_UDP:
65 seq_printf(s, "sport=%hu dport=%hu ",
66 ntohs(tuple->src.u.udp.port),
67 ntohs(tuple->dst.u.udp.port));
68
69 break;
70 case IPPROTO_DCCP:
71 seq_printf(s, "sport=%hu dport=%hu ",
72 ntohs(tuple->src.u.dccp.port),
73 ntohs(tuple->dst.u.dccp.port));
74 break;
75 case IPPROTO_SCTP:
76 seq_printf(s, "sport=%hu dport=%hu ",
77 ntohs(tuple->src.u.sctp.port),
78 ntohs(tuple->dst.u.sctp.port));
79 break;
80 case IPPROTO_ICMPV6:
81 seq_printf(s, "type=%u code=%u id=%u ",
82 tuple->dst.u.icmp.type,
83 tuple->dst.u.icmp.code,
84 ntohs(tuple->src.u.icmp.id));
85 break;
86 case IPPROTO_GRE:
87 seq_printf(s, "srckey=0x%x dstkey=0x%x ",
88 ntohs(tuple->src.u.gre.key),
89 ntohs(tuple->dst.u.gre.key));
90 break;
91 default:
92 break;
93 }
94 }
95 EXPORT_SYMBOL_GPL(print_tuple);
96
97 struct ct_iter_state {
98 struct seq_net_private p;
99 struct hlist_nulls_head *hash;
100 unsigned int htable_size;
101 unsigned int bucket;
102 u_int64_t time_now;
103 };
104
ct_get_first(struct seq_file * seq)105 static struct hlist_nulls_node *ct_get_first(struct seq_file *seq)
106 {
107 struct ct_iter_state *st = seq->private;
108 struct hlist_nulls_node *n;
109
110 for (st->bucket = 0;
111 st->bucket < st->htable_size;
112 st->bucket++) {
113 n = rcu_dereference(
114 hlist_nulls_first_rcu(&st->hash[st->bucket]));
115 if (!is_a_nulls(n))
116 return n;
117 }
118 return NULL;
119 }
120
ct_get_next(struct seq_file * seq,struct hlist_nulls_node * head)121 static struct hlist_nulls_node *ct_get_next(struct seq_file *seq,
122 struct hlist_nulls_node *head)
123 {
124 struct ct_iter_state *st = seq->private;
125
126 head = rcu_dereference(hlist_nulls_next_rcu(head));
127 while (is_a_nulls(head)) {
128 if (likely(get_nulls_value(head) == st->bucket)) {
129 if (++st->bucket >= st->htable_size)
130 return NULL;
131 }
132 head = rcu_dereference(
133 hlist_nulls_first_rcu(&st->hash[st->bucket]));
134 }
135 return head;
136 }
137
ct_get_idx(struct seq_file * seq,loff_t pos)138 static struct hlist_nulls_node *ct_get_idx(struct seq_file *seq, loff_t pos)
139 {
140 struct hlist_nulls_node *head = ct_get_first(seq);
141
142 if (head)
143 while (pos && (head = ct_get_next(seq, head)))
144 pos--;
145 return pos ? NULL : head;
146 }
147
ct_seq_start(struct seq_file * seq,loff_t * pos)148 static void *ct_seq_start(struct seq_file *seq, loff_t *pos)
149 __acquires(RCU)
150 {
151 struct ct_iter_state *st = seq->private;
152
153 st->time_now = ktime_get_real_ns();
154 rcu_read_lock();
155
156 nf_conntrack_get_ht(&st->hash, &st->htable_size);
157 return ct_get_idx(seq, *pos);
158 }
159
ct_seq_next(struct seq_file * s,void * v,loff_t * pos)160 static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos)
161 {
162 (*pos)++;
163 return ct_get_next(s, v);
164 }
165
ct_seq_stop(struct seq_file * s,void * v)166 static void ct_seq_stop(struct seq_file *s, void *v)
167 __releases(RCU)
168 {
169 rcu_read_unlock();
170 }
171
172 #ifdef CONFIG_NF_CONNTRACK_SECMARK
ct_show_secctx(struct seq_file * s,const struct nf_conn * ct)173 static void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
174 {
175 struct lsm_context ctx;
176 int ret;
177
178 ret = security_secid_to_secctx(ct->secmark, &ctx);
179 if (ret < 0)
180 return;
181
182 seq_printf(s, "secctx=%s ", ctx.context);
183
184 security_release_secctx(&ctx);
185 }
186 #else
ct_show_secctx(struct seq_file * s,const struct nf_conn * ct)187 static inline void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
188 {
189 }
190 #endif
191
192 #ifdef CONFIG_NF_CONNTRACK_ZONES
ct_show_zone(struct seq_file * s,const struct nf_conn * ct,int dir)193 static void ct_show_zone(struct seq_file *s, const struct nf_conn *ct,
194 int dir)
195 {
196 const struct nf_conntrack_zone *zone = nf_ct_zone(ct);
197
198 if (zone->dir != dir)
199 return;
200 switch (zone->dir) {
201 case NF_CT_DEFAULT_ZONE_DIR:
202 seq_printf(s, "zone=%u ", zone->id);
203 break;
204 case NF_CT_ZONE_DIR_ORIG:
205 seq_printf(s, "zone-orig=%u ", zone->id);
206 break;
207 case NF_CT_ZONE_DIR_REPL:
208 seq_printf(s, "zone-reply=%u ", zone->id);
209 break;
210 default:
211 break;
212 }
213 }
214 #else
ct_show_zone(struct seq_file * s,const struct nf_conn * ct,int dir)215 static inline void ct_show_zone(struct seq_file *s, const struct nf_conn *ct,
216 int dir)
217 {
218 }
219 #endif
220
221 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
ct_show_delta_time(struct seq_file * s,const struct nf_conn * ct)222 static void ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct)
223 {
224 struct ct_iter_state *st = s->private;
225 struct nf_conn_tstamp *tstamp;
226 s64 delta_time;
227
228 tstamp = nf_conn_tstamp_find(ct);
229 if (tstamp) {
230 delta_time = st->time_now - tstamp->start;
231 if (delta_time > 0)
232 delta_time = div_s64(delta_time, NSEC_PER_SEC);
233 else
234 delta_time = 0;
235
236 seq_printf(s, "delta-time=%llu ",
237 (unsigned long long)delta_time);
238 }
239 return;
240 }
241 #else
242 static inline void
ct_show_delta_time(struct seq_file * s,const struct nf_conn * ct)243 ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct)
244 {
245 }
246 #endif
247
l3proto_name(u16 proto)248 static const char* l3proto_name(u16 proto)
249 {
250 switch (proto) {
251 case AF_INET: return "ipv4";
252 case AF_INET6: return "ipv6";
253 }
254
255 return "unknown";
256 }
257
l4proto_name(u16 proto)258 static const char* l4proto_name(u16 proto)
259 {
260 switch (proto) {
261 case IPPROTO_ICMP: return "icmp";
262 case IPPROTO_TCP: return "tcp";
263 case IPPROTO_UDP: return "udp";
264 case IPPROTO_DCCP: return "dccp";
265 case IPPROTO_GRE: return "gre";
266 case IPPROTO_SCTP: return "sctp";
267 case IPPROTO_UDPLITE: return "udplite";
268 case IPPROTO_ICMPV6: return "icmpv6";
269 }
270
271 return "unknown";
272 }
273
274 static void
seq_print_acct(struct seq_file * s,const struct nf_conn * ct,int dir)275 seq_print_acct(struct seq_file *s, const struct nf_conn *ct, int dir)
276 {
277 struct nf_conn_acct *acct;
278 struct nf_conn_counter *counter;
279
280 acct = nf_conn_acct_find(ct);
281 if (!acct)
282 return;
283
284 counter = acct->counter;
285 seq_printf(s, "packets=%llu bytes=%llu ",
286 (unsigned long long)atomic64_read(&counter[dir].packets),
287 (unsigned long long)atomic64_read(&counter[dir].bytes));
288 }
289
290 /* return 0 on success, 1 in case of error */
ct_seq_show(struct seq_file * s,void * v)291 static int ct_seq_show(struct seq_file *s, void *v)
292 {
293 struct nf_conntrack_tuple_hash *hash = v;
294 struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
295 const struct nf_conntrack_l4proto *l4proto;
296 struct net *net = seq_file_net(s);
297 int ret = 0;
298
299 WARN_ON(!ct);
300 if (unlikely(!refcount_inc_not_zero(&ct->ct_general.use)))
301 return 0;
302
303 /* load ->status after refcount increase */
304 smp_acquire__after_ctrl_dep();
305
306 if (nf_ct_should_gc(ct)) {
307 nf_ct_kill(ct);
308 goto release;
309 }
310
311 /* we only want to print DIR_ORIGINAL */
312 if (NF_CT_DIRECTION(hash))
313 goto release;
314
315 if (!net_eq(nf_ct_net(ct), net))
316 goto release;
317
318 l4proto = nf_ct_l4proto_find(nf_ct_protonum(ct));
319
320 ret = -ENOSPC;
321 seq_printf(s, "%-8s %u %-8s %u ",
322 l3proto_name(nf_ct_l3num(ct)), nf_ct_l3num(ct),
323 l4proto_name(l4proto->l4proto), nf_ct_protonum(ct));
324
325 if (!test_bit(IPS_OFFLOAD_BIT, &ct->status))
326 seq_printf(s, "%ld ", nf_ct_expires(ct) / HZ);
327
328 if (l4proto->print_conntrack)
329 l4proto->print_conntrack(s, ct);
330
331 print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
332 l4proto);
333
334 ct_show_zone(s, ct, NF_CT_ZONE_DIR_ORIG);
335
336 if (seq_has_overflowed(s))
337 goto release;
338
339 seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL);
340
341 if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
342 seq_puts(s, "[UNREPLIED] ");
343
344 print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, l4proto);
345
346 ct_show_zone(s, ct, NF_CT_ZONE_DIR_REPL);
347
348 seq_print_acct(s, ct, IP_CT_DIR_REPLY);
349
350 if (test_bit(IPS_HW_OFFLOAD_BIT, &ct->status))
351 seq_puts(s, "[HW_OFFLOAD] ");
352 else if (test_bit(IPS_OFFLOAD_BIT, &ct->status))
353 seq_puts(s, "[OFFLOAD] ");
354 else if (test_bit(IPS_ASSURED_BIT, &ct->status))
355 seq_puts(s, "[ASSURED] ");
356
357 if (seq_has_overflowed(s))
358 goto release;
359
360 #if defined(CONFIG_NF_CONNTRACK_MARK)
361 seq_printf(s, "mark=%u ", READ_ONCE(ct->mark));
362 #endif
363
364 ct_show_secctx(s, ct);
365 ct_show_zone(s, ct, NF_CT_DEFAULT_ZONE_DIR);
366 ct_show_delta_time(s, ct);
367
368 seq_printf(s, "use=%u\n", refcount_read(&ct->ct_general.use));
369
370 if (seq_has_overflowed(s))
371 goto release;
372
373 ret = 0;
374 release:
375 nf_ct_put(ct);
376 return ret;
377 }
378
379 static const struct seq_operations ct_seq_ops = {
380 .start = ct_seq_start,
381 .next = ct_seq_next,
382 .stop = ct_seq_stop,
383 .show = ct_seq_show
384 };
385
ct_cpu_seq_start(struct seq_file * seq,loff_t * pos)386 static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
387 {
388 struct net *net = seq_file_net(seq);
389 int cpu;
390
391 if (*pos == 0)
392 return SEQ_START_TOKEN;
393
394 for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) {
395 if (!cpu_possible(cpu))
396 continue;
397 *pos = cpu + 1;
398 return per_cpu_ptr(net->ct.stat, cpu);
399 }
400
401 return NULL;
402 }
403
ct_cpu_seq_next(struct seq_file * seq,void * v,loff_t * pos)404 static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
405 {
406 struct net *net = seq_file_net(seq);
407 int cpu;
408
409 for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) {
410 if (!cpu_possible(cpu))
411 continue;
412 *pos = cpu + 1;
413 return per_cpu_ptr(net->ct.stat, cpu);
414 }
415 (*pos)++;
416 return NULL;
417 }
418
ct_cpu_seq_stop(struct seq_file * seq,void * v)419 static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
420 {
421 }
422
ct_cpu_seq_show(struct seq_file * seq,void * v)423 static int ct_cpu_seq_show(struct seq_file *seq, void *v)
424 {
425 struct net *net = seq_file_net(seq);
426 const struct ip_conntrack_stat *st = v;
427 unsigned int nr_conntracks;
428
429 if (v == SEQ_START_TOKEN) {
430 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");
431 return 0;
432 }
433
434 nr_conntracks = nf_conntrack_count(net);
435
436 seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
437 "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n",
438 nr_conntracks,
439 st->clash_resolve,
440 st->found,
441 0,
442 st->invalid,
443 0,
444 0,
445 st->chaintoolong,
446 st->insert,
447 st->insert_failed,
448 st->drop,
449 st->early_drop,
450 st->error,
451
452 st->expect_new,
453 st->expect_create,
454 st->expect_delete,
455 st->search_restart
456 );
457 return 0;
458 }
459
460 static const struct seq_operations ct_cpu_seq_ops = {
461 .start = ct_cpu_seq_start,
462 .next = ct_cpu_seq_next,
463 .stop = ct_cpu_seq_stop,
464 .show = ct_cpu_seq_show,
465 };
466
nf_conntrack_standalone_init_proc(struct net * net)467 static int nf_conntrack_standalone_init_proc(struct net *net)
468 {
469 struct proc_dir_entry *pde;
470 kuid_t root_uid;
471 kgid_t root_gid;
472
473 pde = proc_create_net("nf_conntrack", 0440, net->proc_net, &ct_seq_ops,
474 sizeof(struct ct_iter_state));
475 if (!pde)
476 goto out_nf_conntrack;
477
478 root_uid = make_kuid(net->user_ns, 0);
479 root_gid = make_kgid(net->user_ns, 0);
480 if (uid_valid(root_uid) && gid_valid(root_gid))
481 proc_set_user(pde, root_uid, root_gid);
482
483 pde = proc_create_net("nf_conntrack", 0444, net->proc_net_stat,
484 &ct_cpu_seq_ops, sizeof(struct seq_net_private));
485 if (!pde)
486 goto out_stat_nf_conntrack;
487 return 0;
488
489 out_stat_nf_conntrack:
490 remove_proc_entry("nf_conntrack", net->proc_net);
491 out_nf_conntrack:
492 return -ENOMEM;
493 }
494
nf_conntrack_standalone_fini_proc(struct net * net)495 static void nf_conntrack_standalone_fini_proc(struct net *net)
496 {
497 remove_proc_entry("nf_conntrack", net->proc_net_stat);
498 remove_proc_entry("nf_conntrack", net->proc_net);
499 }
500 #else
nf_conntrack_standalone_init_proc(struct net * net)501 static int nf_conntrack_standalone_init_proc(struct net *net)
502 {
503 return 0;
504 }
505
nf_conntrack_standalone_fini_proc(struct net * net)506 static void nf_conntrack_standalone_fini_proc(struct net *net)
507 {
508 }
509 #endif /* CONFIG_NF_CONNTRACK_PROCFS */
510
nf_conntrack_count(const struct net * net)511 u32 nf_conntrack_count(const struct net *net)
512 {
513 const struct nf_conntrack_net *cnet = nf_ct_pernet(net);
514
515 return atomic_read(&cnet->count);
516 }
517 EXPORT_SYMBOL_GPL(nf_conntrack_count);
518
519 /* Sysctl support */
520
521 #ifdef CONFIG_SYSCTL
522 /* size the user *wants to set */
523 static unsigned int nf_conntrack_htable_size_user __read_mostly;
524
525 static int
nf_conntrack_hash_sysctl(const struct ctl_table * table,int write,void * buffer,size_t * lenp,loff_t * ppos)526 nf_conntrack_hash_sysctl(const struct ctl_table *table, int write,
527 void *buffer, size_t *lenp, loff_t *ppos)
528 {
529 int ret;
530
531 /* module_param hashsize could have changed value */
532 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
533
534 ret = proc_dointvec(table, write, buffer, lenp, ppos);
535 if (ret < 0 || !write)
536 return ret;
537
538 /* update ret, we might not be able to satisfy request */
539 ret = nf_conntrack_hash_resize(nf_conntrack_htable_size_user);
540
541 /* update it to the actual value used by conntrack */
542 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
543 return ret;
544 }
545
546 static struct ctl_table_header *nf_ct_netfilter_header;
547
548 enum nf_ct_sysctl_index {
549 NF_SYSCTL_CT_MAX,
550 NF_SYSCTL_CT_COUNT,
551 NF_SYSCTL_CT_BUCKETS,
552 NF_SYSCTL_CT_CHECKSUM,
553 NF_SYSCTL_CT_LOG_INVALID,
554 NF_SYSCTL_CT_EXPECT_MAX,
555 NF_SYSCTL_CT_ACCT,
556 #ifdef CONFIG_NF_CONNTRACK_EVENTS
557 NF_SYSCTL_CT_EVENTS,
558 #endif
559 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
560 NF_SYSCTL_CT_TIMESTAMP,
561 #endif
562 NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC,
563 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT,
564 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV,
565 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED,
566 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT,
567 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT,
568 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK,
569 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT,
570 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE,
571 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS,
572 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK,
573 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
574 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD,
575 #endif
576 NF_SYSCTL_CT_PROTO_TCP_LOOSE,
577 NF_SYSCTL_CT_PROTO_TCP_LIBERAL,
578 NF_SYSCTL_CT_PROTO_TCP_IGNORE_INVALID_RST,
579 NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS,
580 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP,
581 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM,
582 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
583 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD,
584 #endif
585 NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP,
586 NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6,
587 #ifdef CONFIG_NF_CT_PROTO_SCTP
588 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED,
589 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT,
590 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED,
591 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED,
592 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT,
593 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD,
594 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT,
595 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT,
596 #endif
597 #ifdef CONFIG_NF_CT_PROTO_DCCP
598 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST,
599 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND,
600 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN,
601 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN,
602 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ,
603 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING,
604 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT,
605 NF_SYSCTL_CT_PROTO_DCCP_LOOSE,
606 #endif
607 #ifdef CONFIG_NF_CT_PROTO_GRE
608 NF_SYSCTL_CT_PROTO_TIMEOUT_GRE,
609 NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM,
610 #endif
611
612 NF_SYSCTL_CT_LAST_SYSCTL,
613 };
614
615 static struct ctl_table nf_ct_sysctl_table[] = {
616 [NF_SYSCTL_CT_MAX] = {
617 .procname = "nf_conntrack_max",
618 .data = &nf_conntrack_max,
619 .maxlen = sizeof(int),
620 .mode = 0644,
621 .proc_handler = proc_dointvec_minmax,
622 .extra1 = SYSCTL_ZERO,
623 .extra2 = SYSCTL_INT_MAX,
624 },
625 [NF_SYSCTL_CT_COUNT] = {
626 .procname = "nf_conntrack_count",
627 .maxlen = sizeof(int),
628 .mode = 0444,
629 .proc_handler = proc_dointvec,
630 },
631 [NF_SYSCTL_CT_BUCKETS] = {
632 .procname = "nf_conntrack_buckets",
633 .data = &nf_conntrack_htable_size_user,
634 .maxlen = sizeof(unsigned int),
635 .mode = 0644,
636 .proc_handler = nf_conntrack_hash_sysctl,
637 },
638 [NF_SYSCTL_CT_CHECKSUM] = {
639 .procname = "nf_conntrack_checksum",
640 .data = &init_net.ct.sysctl_checksum,
641 .maxlen = sizeof(u8),
642 .mode = 0644,
643 .proc_handler = proc_dou8vec_minmax,
644 .extra1 = SYSCTL_ZERO,
645 .extra2 = SYSCTL_ONE,
646 },
647 [NF_SYSCTL_CT_LOG_INVALID] = {
648 .procname = "nf_conntrack_log_invalid",
649 .data = &init_net.ct.sysctl_log_invalid,
650 .maxlen = sizeof(u8),
651 .mode = 0644,
652 .proc_handler = proc_dou8vec_minmax,
653 },
654 [NF_SYSCTL_CT_EXPECT_MAX] = {
655 .procname = "nf_conntrack_expect_max",
656 .data = &nf_ct_expect_max,
657 .maxlen = sizeof(int),
658 .mode = 0644,
659 .proc_handler = proc_dointvec_minmax,
660 .extra1 = SYSCTL_ONE,
661 .extra2 = SYSCTL_INT_MAX,
662 },
663 [NF_SYSCTL_CT_ACCT] = {
664 .procname = "nf_conntrack_acct",
665 .data = &init_net.ct.sysctl_acct,
666 .maxlen = sizeof(u8),
667 .mode = 0644,
668 .proc_handler = proc_dou8vec_minmax,
669 .extra1 = SYSCTL_ZERO,
670 .extra2 = SYSCTL_ONE,
671 },
672 #ifdef CONFIG_NF_CONNTRACK_EVENTS
673 [NF_SYSCTL_CT_EVENTS] = {
674 .procname = "nf_conntrack_events",
675 .data = &init_net.ct.sysctl_events,
676 .maxlen = sizeof(u8),
677 .mode = 0644,
678 .proc_handler = proc_dou8vec_minmax,
679 .extra1 = SYSCTL_ZERO,
680 .extra2 = SYSCTL_TWO,
681 },
682 #endif
683 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
684 [NF_SYSCTL_CT_TIMESTAMP] = {
685 .procname = "nf_conntrack_timestamp",
686 .data = &init_net.ct.sysctl_tstamp,
687 .maxlen = sizeof(u8),
688 .mode = 0644,
689 .proc_handler = proc_dou8vec_minmax,
690 .extra1 = SYSCTL_ZERO,
691 .extra2 = SYSCTL_ONE,
692 },
693 #endif
694 [NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC] = {
695 .procname = "nf_conntrack_generic_timeout",
696 .maxlen = sizeof(unsigned int),
697 .mode = 0644,
698 .proc_handler = proc_dointvec_jiffies,
699 },
700 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT] = {
701 .procname = "nf_conntrack_tcp_timeout_syn_sent",
702 .maxlen = sizeof(unsigned int),
703 .mode = 0644,
704 .proc_handler = proc_dointvec_jiffies,
705 },
706 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV] = {
707 .procname = "nf_conntrack_tcp_timeout_syn_recv",
708 .maxlen = sizeof(unsigned int),
709 .mode = 0644,
710 .proc_handler = proc_dointvec_jiffies,
711 },
712 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED] = {
713 .procname = "nf_conntrack_tcp_timeout_established",
714 .maxlen = sizeof(unsigned int),
715 .mode = 0644,
716 .proc_handler = proc_dointvec_jiffies,
717 },
718 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT] = {
719 .procname = "nf_conntrack_tcp_timeout_fin_wait",
720 .maxlen = sizeof(unsigned int),
721 .mode = 0644,
722 .proc_handler = proc_dointvec_jiffies,
723 },
724 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT] = {
725 .procname = "nf_conntrack_tcp_timeout_close_wait",
726 .maxlen = sizeof(unsigned int),
727 .mode = 0644,
728 .proc_handler = proc_dointvec_jiffies,
729 },
730 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK] = {
731 .procname = "nf_conntrack_tcp_timeout_last_ack",
732 .maxlen = sizeof(unsigned int),
733 .mode = 0644,
734 .proc_handler = proc_dointvec_jiffies,
735 },
736 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT] = {
737 .procname = "nf_conntrack_tcp_timeout_time_wait",
738 .maxlen = sizeof(unsigned int),
739 .mode = 0644,
740 .proc_handler = proc_dointvec_jiffies,
741 },
742 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE] = {
743 .procname = "nf_conntrack_tcp_timeout_close",
744 .maxlen = sizeof(unsigned int),
745 .mode = 0644,
746 .proc_handler = proc_dointvec_jiffies,
747 },
748 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS] = {
749 .procname = "nf_conntrack_tcp_timeout_max_retrans",
750 .maxlen = sizeof(unsigned int),
751 .mode = 0644,
752 .proc_handler = proc_dointvec_jiffies,
753 },
754 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK] = {
755 .procname = "nf_conntrack_tcp_timeout_unacknowledged",
756 .maxlen = sizeof(unsigned int),
757 .mode = 0644,
758 .proc_handler = proc_dointvec_jiffies,
759 },
760 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
761 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD] = {
762 .procname = "nf_flowtable_tcp_timeout",
763 .maxlen = sizeof(unsigned int),
764 .mode = 0644,
765 .proc_handler = proc_dointvec_jiffies,
766 },
767 #endif
768 [NF_SYSCTL_CT_PROTO_TCP_LOOSE] = {
769 .procname = "nf_conntrack_tcp_loose",
770 .maxlen = sizeof(u8),
771 .mode = 0644,
772 .proc_handler = proc_dou8vec_minmax,
773 .extra1 = SYSCTL_ZERO,
774 .extra2 = SYSCTL_ONE,
775 },
776 [NF_SYSCTL_CT_PROTO_TCP_LIBERAL] = {
777 .procname = "nf_conntrack_tcp_be_liberal",
778 .maxlen = sizeof(u8),
779 .mode = 0644,
780 .proc_handler = proc_dou8vec_minmax,
781 .extra1 = SYSCTL_ZERO,
782 .extra2 = SYSCTL_ONE,
783 },
784 [NF_SYSCTL_CT_PROTO_TCP_IGNORE_INVALID_RST] = {
785 .procname = "nf_conntrack_tcp_ignore_invalid_rst",
786 .maxlen = sizeof(u8),
787 .mode = 0644,
788 .proc_handler = proc_dou8vec_minmax,
789 .extra1 = SYSCTL_ZERO,
790 .extra2 = SYSCTL_ONE,
791 },
792 [NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS] = {
793 .procname = "nf_conntrack_tcp_max_retrans",
794 .maxlen = sizeof(u8),
795 .mode = 0644,
796 .proc_handler = proc_dou8vec_minmax,
797 },
798 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP] = {
799 .procname = "nf_conntrack_udp_timeout",
800 .maxlen = sizeof(unsigned int),
801 .mode = 0644,
802 .proc_handler = proc_dointvec_jiffies,
803 },
804 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM] = {
805 .procname = "nf_conntrack_udp_timeout_stream",
806 .maxlen = sizeof(unsigned int),
807 .mode = 0644,
808 .proc_handler = proc_dointvec_jiffies,
809 },
810 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
811 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD] = {
812 .procname = "nf_flowtable_udp_timeout",
813 .maxlen = sizeof(unsigned int),
814 .mode = 0644,
815 .proc_handler = proc_dointvec_jiffies,
816 },
817 #endif
818 [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP] = {
819 .procname = "nf_conntrack_icmp_timeout",
820 .maxlen = sizeof(unsigned int),
821 .mode = 0644,
822 .proc_handler = proc_dointvec_jiffies,
823 },
824 [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6] = {
825 .procname = "nf_conntrack_icmpv6_timeout",
826 .maxlen = sizeof(unsigned int),
827 .mode = 0644,
828 .proc_handler = proc_dointvec_jiffies,
829 },
830 #ifdef CONFIG_NF_CT_PROTO_SCTP
831 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED] = {
832 .procname = "nf_conntrack_sctp_timeout_closed",
833 .maxlen = sizeof(unsigned int),
834 .mode = 0644,
835 .proc_handler = proc_dointvec_jiffies,
836 },
837 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT] = {
838 .procname = "nf_conntrack_sctp_timeout_cookie_wait",
839 .maxlen = sizeof(unsigned int),
840 .mode = 0644,
841 .proc_handler = proc_dointvec_jiffies,
842 },
843 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED] = {
844 .procname = "nf_conntrack_sctp_timeout_cookie_echoed",
845 .maxlen = sizeof(unsigned int),
846 .mode = 0644,
847 .proc_handler = proc_dointvec_jiffies,
848 },
849 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED] = {
850 .procname = "nf_conntrack_sctp_timeout_established",
851 .maxlen = sizeof(unsigned int),
852 .mode = 0644,
853 .proc_handler = proc_dointvec_jiffies,
854 },
855 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT] = {
856 .procname = "nf_conntrack_sctp_timeout_shutdown_sent",
857 .maxlen = sizeof(unsigned int),
858 .mode = 0644,
859 .proc_handler = proc_dointvec_jiffies,
860 },
861 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD] = {
862 .procname = "nf_conntrack_sctp_timeout_shutdown_recd",
863 .maxlen = sizeof(unsigned int),
864 .mode = 0644,
865 .proc_handler = proc_dointvec_jiffies,
866 },
867 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT] = {
868 .procname = "nf_conntrack_sctp_timeout_shutdown_ack_sent",
869 .maxlen = sizeof(unsigned int),
870 .mode = 0644,
871 .proc_handler = proc_dointvec_jiffies,
872 },
873 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT] = {
874 .procname = "nf_conntrack_sctp_timeout_heartbeat_sent",
875 .maxlen = sizeof(unsigned int),
876 .mode = 0644,
877 .proc_handler = proc_dointvec_jiffies,
878 },
879 #endif
880 #ifdef CONFIG_NF_CT_PROTO_DCCP
881 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST] = {
882 .procname = "nf_conntrack_dccp_timeout_request",
883 .maxlen = sizeof(unsigned int),
884 .mode = 0644,
885 .proc_handler = proc_dointvec_jiffies,
886 },
887 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND] = {
888 .procname = "nf_conntrack_dccp_timeout_respond",
889 .maxlen = sizeof(unsigned int),
890 .mode = 0644,
891 .proc_handler = proc_dointvec_jiffies,
892 },
893 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN] = {
894 .procname = "nf_conntrack_dccp_timeout_partopen",
895 .maxlen = sizeof(unsigned int),
896 .mode = 0644,
897 .proc_handler = proc_dointvec_jiffies,
898 },
899 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN] = {
900 .procname = "nf_conntrack_dccp_timeout_open",
901 .maxlen = sizeof(unsigned int),
902 .mode = 0644,
903 .proc_handler = proc_dointvec_jiffies,
904 },
905 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ] = {
906 .procname = "nf_conntrack_dccp_timeout_closereq",
907 .maxlen = sizeof(unsigned int),
908 .mode = 0644,
909 .proc_handler = proc_dointvec_jiffies,
910 },
911 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING] = {
912 .procname = "nf_conntrack_dccp_timeout_closing",
913 .maxlen = sizeof(unsigned int),
914 .mode = 0644,
915 .proc_handler = proc_dointvec_jiffies,
916 },
917 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT] = {
918 .procname = "nf_conntrack_dccp_timeout_timewait",
919 .maxlen = sizeof(unsigned int),
920 .mode = 0644,
921 .proc_handler = proc_dointvec_jiffies,
922 },
923 [NF_SYSCTL_CT_PROTO_DCCP_LOOSE] = {
924 .procname = "nf_conntrack_dccp_loose",
925 .maxlen = sizeof(u8),
926 .mode = 0644,
927 .proc_handler = proc_dou8vec_minmax,
928 .extra1 = SYSCTL_ZERO,
929 .extra2 = SYSCTL_ONE,
930 },
931 #endif
932 #ifdef CONFIG_NF_CT_PROTO_GRE
933 [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE] = {
934 .procname = "nf_conntrack_gre_timeout",
935 .maxlen = sizeof(unsigned int),
936 .mode = 0644,
937 .proc_handler = proc_dointvec_jiffies,
938 },
939 [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM] = {
940 .procname = "nf_conntrack_gre_timeout_stream",
941 .maxlen = sizeof(unsigned int),
942 .mode = 0644,
943 .proc_handler = proc_dointvec_jiffies,
944 },
945 #endif
946 };
947
948 static struct ctl_table nf_ct_netfilter_table[] = {
949 {
950 .procname = "nf_conntrack_max",
951 .data = &nf_conntrack_max,
952 .maxlen = sizeof(int),
953 .mode = 0644,
954 .proc_handler = proc_dointvec_minmax,
955 .extra1 = SYSCTL_ZERO,
956 .extra2 = SYSCTL_INT_MAX,
957 },
958 };
959
nf_conntrack_standalone_init_tcp_sysctl(struct net * net,struct ctl_table * table)960 static void nf_conntrack_standalone_init_tcp_sysctl(struct net *net,
961 struct ctl_table *table)
962 {
963 struct nf_tcp_net *tn = nf_tcp_pernet(net);
964
965 #define XASSIGN(XNAME, tn) \
966 table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ ## XNAME].data = \
967 &(tn)->timeouts[TCP_CONNTRACK_ ## XNAME]
968
969 XASSIGN(SYN_SENT, tn);
970 XASSIGN(SYN_RECV, tn);
971 XASSIGN(ESTABLISHED, tn);
972 XASSIGN(FIN_WAIT, tn);
973 XASSIGN(CLOSE_WAIT, tn);
974 XASSIGN(LAST_ACK, tn);
975 XASSIGN(TIME_WAIT, tn);
976 XASSIGN(CLOSE, tn);
977 XASSIGN(RETRANS, tn);
978 XASSIGN(UNACK, tn);
979 #undef XASSIGN
980 #define XASSIGN(XNAME, rval) \
981 table[NF_SYSCTL_CT_PROTO_TCP_ ## XNAME].data = (rval)
982
983 XASSIGN(LOOSE, &tn->tcp_loose);
984 XASSIGN(LIBERAL, &tn->tcp_be_liberal);
985 XASSIGN(MAX_RETRANS, &tn->tcp_max_retrans);
986 XASSIGN(IGNORE_INVALID_RST, &tn->tcp_ignore_invalid_rst);
987 #undef XASSIGN
988
989 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
990 table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD].data = &tn->offload_timeout;
991 #endif
992
993 }
994
nf_conntrack_standalone_init_sctp_sysctl(struct net * net,struct ctl_table * table)995 static void nf_conntrack_standalone_init_sctp_sysctl(struct net *net,
996 struct ctl_table *table)
997 {
998 #ifdef CONFIG_NF_CT_PROTO_SCTP
999 struct nf_sctp_net *sn = nf_sctp_pernet(net);
1000
1001 #define XASSIGN(XNAME, sn) \
1002 table[NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ ## XNAME].data = \
1003 &(sn)->timeouts[SCTP_CONNTRACK_ ## XNAME]
1004
1005 XASSIGN(CLOSED, sn);
1006 XASSIGN(COOKIE_WAIT, sn);
1007 XASSIGN(COOKIE_ECHOED, sn);
1008 XASSIGN(ESTABLISHED, sn);
1009 XASSIGN(SHUTDOWN_SENT, sn);
1010 XASSIGN(SHUTDOWN_RECD, sn);
1011 XASSIGN(SHUTDOWN_ACK_SENT, sn);
1012 XASSIGN(HEARTBEAT_SENT, sn);
1013 #undef XASSIGN
1014 #endif
1015 }
1016
nf_conntrack_standalone_init_dccp_sysctl(struct net * net,struct ctl_table * table)1017 static void nf_conntrack_standalone_init_dccp_sysctl(struct net *net,
1018 struct ctl_table *table)
1019 {
1020 #ifdef CONFIG_NF_CT_PROTO_DCCP
1021 struct nf_dccp_net *dn = nf_dccp_pernet(net);
1022
1023 #define XASSIGN(XNAME, dn) \
1024 table[NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_ ## XNAME].data = \
1025 &(dn)->dccp_timeout[CT_DCCP_ ## XNAME]
1026
1027 XASSIGN(REQUEST, dn);
1028 XASSIGN(RESPOND, dn);
1029 XASSIGN(PARTOPEN, dn);
1030 XASSIGN(OPEN, dn);
1031 XASSIGN(CLOSEREQ, dn);
1032 XASSIGN(CLOSING, dn);
1033 XASSIGN(TIMEWAIT, dn);
1034 #undef XASSIGN
1035
1036 table[NF_SYSCTL_CT_PROTO_DCCP_LOOSE].data = &dn->dccp_loose;
1037 #endif
1038 }
1039
nf_conntrack_standalone_init_gre_sysctl(struct net * net,struct ctl_table * table)1040 static void nf_conntrack_standalone_init_gre_sysctl(struct net *net,
1041 struct ctl_table *table)
1042 {
1043 #ifdef CONFIG_NF_CT_PROTO_GRE
1044 struct nf_gre_net *gn = nf_gre_pernet(net);
1045
1046 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE].data = &gn->timeouts[GRE_CT_UNREPLIED];
1047 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM].data = &gn->timeouts[GRE_CT_REPLIED];
1048 #endif
1049 }
1050
nf_conntrack_standalone_init_sysctl(struct net * net)1051 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1052 {
1053 struct nf_conntrack_net *cnet = nf_ct_pernet(net);
1054 struct nf_udp_net *un = nf_udp_pernet(net);
1055 struct ctl_table *table;
1056
1057 BUILD_BUG_ON(ARRAY_SIZE(nf_ct_sysctl_table) != NF_SYSCTL_CT_LAST_SYSCTL);
1058
1059 table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table),
1060 GFP_KERNEL);
1061 if (!table)
1062 return -ENOMEM;
1063
1064 table[NF_SYSCTL_CT_COUNT].data = &cnet->count;
1065 table[NF_SYSCTL_CT_CHECKSUM].data = &net->ct.sysctl_checksum;
1066 table[NF_SYSCTL_CT_LOG_INVALID].data = &net->ct.sysctl_log_invalid;
1067 table[NF_SYSCTL_CT_ACCT].data = &net->ct.sysctl_acct;
1068 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1069 table[NF_SYSCTL_CT_EVENTS].data = &net->ct.sysctl_events;
1070 #endif
1071 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
1072 table[NF_SYSCTL_CT_TIMESTAMP].data = &net->ct.sysctl_tstamp;
1073 #endif
1074 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC].data = &nf_generic_pernet(net)->timeout;
1075 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP].data = &nf_icmp_pernet(net)->timeout;
1076 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6].data = &nf_icmpv6_pernet(net)->timeout;
1077 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP].data = &un->timeouts[UDP_CT_UNREPLIED];
1078 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM].data = &un->timeouts[UDP_CT_REPLIED];
1079 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
1080 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD].data = &un->offload_timeout;
1081 #endif
1082
1083 nf_conntrack_standalone_init_tcp_sysctl(net, table);
1084 nf_conntrack_standalone_init_sctp_sysctl(net, table);
1085 nf_conntrack_standalone_init_dccp_sysctl(net, table);
1086 nf_conntrack_standalone_init_gre_sysctl(net, table);
1087
1088 /* Don't allow non-init_net ns to alter global sysctls */
1089 if (!net_eq(&init_net, net)) {
1090 table[NF_SYSCTL_CT_MAX].mode = 0444;
1091 table[NF_SYSCTL_CT_EXPECT_MAX].mode = 0444;
1092 table[NF_SYSCTL_CT_BUCKETS].mode = 0444;
1093 }
1094
1095 cnet->sysctl_header = register_net_sysctl_sz(net, "net/netfilter",
1096 table,
1097 ARRAY_SIZE(nf_ct_sysctl_table));
1098 if (!cnet->sysctl_header)
1099 goto out_unregister_netfilter;
1100
1101 return 0;
1102
1103 out_unregister_netfilter:
1104 kfree(table);
1105 return -ENOMEM;
1106 }
1107
nf_conntrack_standalone_fini_sysctl(struct net * net)1108 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1109 {
1110 struct nf_conntrack_net *cnet = nf_ct_pernet(net);
1111 const struct ctl_table *table;
1112
1113 table = cnet->sysctl_header->ctl_table_arg;
1114 unregister_net_sysctl_table(cnet->sysctl_header);
1115 kfree(table);
1116 }
1117 #else
nf_conntrack_standalone_init_sysctl(struct net * net)1118 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1119 {
1120 return 0;
1121 }
1122
nf_conntrack_standalone_fini_sysctl(struct net * net)1123 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1124 {
1125 }
1126 #endif /* CONFIG_SYSCTL */
1127
nf_conntrack_fini_net(struct net * net)1128 static void nf_conntrack_fini_net(struct net *net)
1129 {
1130 if (enable_hooks)
1131 nf_ct_netns_put(net, NFPROTO_INET);
1132
1133 nf_conntrack_standalone_fini_proc(net);
1134 nf_conntrack_standalone_fini_sysctl(net);
1135 }
1136
nf_conntrack_pernet_init(struct net * net)1137 static int nf_conntrack_pernet_init(struct net *net)
1138 {
1139 int ret;
1140
1141 net->ct.sysctl_checksum = 1;
1142
1143 ret = nf_conntrack_standalone_init_sysctl(net);
1144 if (ret < 0)
1145 return ret;
1146
1147 ret = nf_conntrack_standalone_init_proc(net);
1148 if (ret < 0)
1149 goto out_proc;
1150
1151 ret = nf_conntrack_init_net(net);
1152 if (ret < 0)
1153 goto out_init_net;
1154
1155 if (enable_hooks) {
1156 ret = nf_ct_netns_get(net, NFPROTO_INET);
1157 if (ret < 0)
1158 goto out_hooks;
1159 }
1160
1161 return 0;
1162
1163 out_hooks:
1164 nf_conntrack_cleanup_net(net);
1165 out_init_net:
1166 nf_conntrack_standalone_fini_proc(net);
1167 out_proc:
1168 nf_conntrack_standalone_fini_sysctl(net);
1169 return ret;
1170 }
1171
nf_conntrack_pernet_exit(struct list_head * net_exit_list)1172 static void nf_conntrack_pernet_exit(struct list_head *net_exit_list)
1173 {
1174 struct net *net;
1175
1176 list_for_each_entry(net, net_exit_list, exit_list)
1177 nf_conntrack_fini_net(net);
1178
1179 nf_conntrack_cleanup_net_list(net_exit_list);
1180 }
1181
1182 static struct pernet_operations nf_conntrack_net_ops = {
1183 .init = nf_conntrack_pernet_init,
1184 .exit_batch = nf_conntrack_pernet_exit,
1185 .id = &nf_conntrack_net_id,
1186 .size = sizeof(struct nf_conntrack_net),
1187 };
1188
nf_conntrack_standalone_init(void)1189 static int __init nf_conntrack_standalone_init(void)
1190 {
1191 int ret = nf_conntrack_init_start();
1192 if (ret < 0)
1193 goto out_start;
1194
1195 BUILD_BUG_ON(NFCT_INFOMASK <= IP_CT_NUMBER);
1196
1197 #ifdef CONFIG_SYSCTL
1198 nf_ct_netfilter_header =
1199 register_net_sysctl(&init_net, "net", nf_ct_netfilter_table);
1200 if (!nf_ct_netfilter_header) {
1201 pr_err("nf_conntrack: can't register to sysctl.\n");
1202 ret = -ENOMEM;
1203 goto out_sysctl;
1204 }
1205
1206 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
1207 #endif
1208
1209 nf_conntrack_init_end();
1210
1211 ret = register_pernet_subsys(&nf_conntrack_net_ops);
1212 if (ret < 0)
1213 goto out_pernet;
1214
1215 return 0;
1216
1217 out_pernet:
1218 #ifdef CONFIG_SYSCTL
1219 unregister_net_sysctl_table(nf_ct_netfilter_header);
1220 out_sysctl:
1221 #endif
1222 nf_conntrack_cleanup_end();
1223 out_start:
1224 return ret;
1225 }
1226
nf_conntrack_standalone_fini(void)1227 static void __exit nf_conntrack_standalone_fini(void)
1228 {
1229 nf_conntrack_cleanup_start();
1230 unregister_pernet_subsys(&nf_conntrack_net_ops);
1231 #ifdef CONFIG_SYSCTL
1232 unregister_net_sysctl_table(nf_ct_netfilter_header);
1233 #endif
1234 nf_conntrack_cleanup_end();
1235 }
1236
1237 module_init(nf_conntrack_standalone_init);
1238 module_exit(nf_conntrack_standalone_fini);
1239