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