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,
622 },
623 [NF_SYSCTL_CT_COUNT] = {
624 .procname = "nf_conntrack_count",
625 .maxlen = sizeof(int),
626 .mode = 0444,
627 .proc_handler = proc_dointvec,
628 },
629 [NF_SYSCTL_CT_BUCKETS] = {
630 .procname = "nf_conntrack_buckets",
631 .data = &nf_conntrack_htable_size_user,
632 .maxlen = sizeof(unsigned int),
633 .mode = 0644,
634 .proc_handler = nf_conntrack_hash_sysctl,
635 },
636 [NF_SYSCTL_CT_CHECKSUM] = {
637 .procname = "nf_conntrack_checksum",
638 .data = &init_net.ct.sysctl_checksum,
639 .maxlen = sizeof(u8),
640 .mode = 0644,
641 .proc_handler = proc_dou8vec_minmax,
642 .extra1 = SYSCTL_ZERO,
643 .extra2 = SYSCTL_ONE,
644 },
645 [NF_SYSCTL_CT_LOG_INVALID] = {
646 .procname = "nf_conntrack_log_invalid",
647 .data = &init_net.ct.sysctl_log_invalid,
648 .maxlen = sizeof(u8),
649 .mode = 0644,
650 .proc_handler = proc_dou8vec_minmax,
651 },
652 [NF_SYSCTL_CT_EXPECT_MAX] = {
653 .procname = "nf_conntrack_expect_max",
654 .data = &nf_ct_expect_max,
655 .maxlen = sizeof(int),
656 .mode = 0644,
657 .proc_handler = proc_dointvec,
658 },
659 [NF_SYSCTL_CT_ACCT] = {
660 .procname = "nf_conntrack_acct",
661 .data = &init_net.ct.sysctl_acct,
662 .maxlen = sizeof(u8),
663 .mode = 0644,
664 .proc_handler = proc_dou8vec_minmax,
665 .extra1 = SYSCTL_ZERO,
666 .extra2 = SYSCTL_ONE,
667 },
668 #ifdef CONFIG_NF_CONNTRACK_EVENTS
669 [NF_SYSCTL_CT_EVENTS] = {
670 .procname = "nf_conntrack_events",
671 .data = &init_net.ct.sysctl_events,
672 .maxlen = sizeof(u8),
673 .mode = 0644,
674 .proc_handler = proc_dou8vec_minmax,
675 .extra1 = SYSCTL_ZERO,
676 .extra2 = SYSCTL_TWO,
677 },
678 #endif
679 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
680 [NF_SYSCTL_CT_TIMESTAMP] = {
681 .procname = "nf_conntrack_timestamp",
682 .data = &init_net.ct.sysctl_tstamp,
683 .maxlen = sizeof(u8),
684 .mode = 0644,
685 .proc_handler = proc_dou8vec_minmax,
686 .extra1 = SYSCTL_ZERO,
687 .extra2 = SYSCTL_ONE,
688 },
689 #endif
690 [NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC] = {
691 .procname = "nf_conntrack_generic_timeout",
692 .maxlen = sizeof(unsigned int),
693 .mode = 0644,
694 .proc_handler = proc_dointvec_jiffies,
695 },
696 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT] = {
697 .procname = "nf_conntrack_tcp_timeout_syn_sent",
698 .maxlen = sizeof(unsigned int),
699 .mode = 0644,
700 .proc_handler = proc_dointvec_jiffies,
701 },
702 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV] = {
703 .procname = "nf_conntrack_tcp_timeout_syn_recv",
704 .maxlen = sizeof(unsigned int),
705 .mode = 0644,
706 .proc_handler = proc_dointvec_jiffies,
707 },
708 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED] = {
709 .procname = "nf_conntrack_tcp_timeout_established",
710 .maxlen = sizeof(unsigned int),
711 .mode = 0644,
712 .proc_handler = proc_dointvec_jiffies,
713 },
714 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT] = {
715 .procname = "nf_conntrack_tcp_timeout_fin_wait",
716 .maxlen = sizeof(unsigned int),
717 .mode = 0644,
718 .proc_handler = proc_dointvec_jiffies,
719 },
720 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT] = {
721 .procname = "nf_conntrack_tcp_timeout_close_wait",
722 .maxlen = sizeof(unsigned int),
723 .mode = 0644,
724 .proc_handler = proc_dointvec_jiffies,
725 },
726 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK] = {
727 .procname = "nf_conntrack_tcp_timeout_last_ack",
728 .maxlen = sizeof(unsigned int),
729 .mode = 0644,
730 .proc_handler = proc_dointvec_jiffies,
731 },
732 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT] = {
733 .procname = "nf_conntrack_tcp_timeout_time_wait",
734 .maxlen = sizeof(unsigned int),
735 .mode = 0644,
736 .proc_handler = proc_dointvec_jiffies,
737 },
738 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE] = {
739 .procname = "nf_conntrack_tcp_timeout_close",
740 .maxlen = sizeof(unsigned int),
741 .mode = 0644,
742 .proc_handler = proc_dointvec_jiffies,
743 },
744 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS] = {
745 .procname = "nf_conntrack_tcp_timeout_max_retrans",
746 .maxlen = sizeof(unsigned int),
747 .mode = 0644,
748 .proc_handler = proc_dointvec_jiffies,
749 },
750 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK] = {
751 .procname = "nf_conntrack_tcp_timeout_unacknowledged",
752 .maxlen = sizeof(unsigned int),
753 .mode = 0644,
754 .proc_handler = proc_dointvec_jiffies,
755 },
756 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
757 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD] = {
758 .procname = "nf_flowtable_tcp_timeout",
759 .maxlen = sizeof(unsigned int),
760 .mode = 0644,
761 .proc_handler = proc_dointvec_jiffies,
762 },
763 #endif
764 [NF_SYSCTL_CT_PROTO_TCP_LOOSE] = {
765 .procname = "nf_conntrack_tcp_loose",
766 .maxlen = sizeof(u8),
767 .mode = 0644,
768 .proc_handler = proc_dou8vec_minmax,
769 .extra1 = SYSCTL_ZERO,
770 .extra2 = SYSCTL_ONE,
771 },
772 [NF_SYSCTL_CT_PROTO_TCP_LIBERAL] = {
773 .procname = "nf_conntrack_tcp_be_liberal",
774 .maxlen = sizeof(u8),
775 .mode = 0644,
776 .proc_handler = proc_dou8vec_minmax,
777 .extra1 = SYSCTL_ZERO,
778 .extra2 = SYSCTL_ONE,
779 },
780 [NF_SYSCTL_CT_PROTO_TCP_IGNORE_INVALID_RST] = {
781 .procname = "nf_conntrack_tcp_ignore_invalid_rst",
782 .maxlen = sizeof(u8),
783 .mode = 0644,
784 .proc_handler = proc_dou8vec_minmax,
785 .extra1 = SYSCTL_ZERO,
786 .extra2 = SYSCTL_ONE,
787 },
788 [NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS] = {
789 .procname = "nf_conntrack_tcp_max_retrans",
790 .maxlen = sizeof(u8),
791 .mode = 0644,
792 .proc_handler = proc_dou8vec_minmax,
793 },
794 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP] = {
795 .procname = "nf_conntrack_udp_timeout",
796 .maxlen = sizeof(unsigned int),
797 .mode = 0644,
798 .proc_handler = proc_dointvec_jiffies,
799 },
800 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM] = {
801 .procname = "nf_conntrack_udp_timeout_stream",
802 .maxlen = sizeof(unsigned int),
803 .mode = 0644,
804 .proc_handler = proc_dointvec_jiffies,
805 },
806 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
807 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD] = {
808 .procname = "nf_flowtable_udp_timeout",
809 .maxlen = sizeof(unsigned int),
810 .mode = 0644,
811 .proc_handler = proc_dointvec_jiffies,
812 },
813 #endif
814 [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP] = {
815 .procname = "nf_conntrack_icmp_timeout",
816 .maxlen = sizeof(unsigned int),
817 .mode = 0644,
818 .proc_handler = proc_dointvec_jiffies,
819 },
820 [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6] = {
821 .procname = "nf_conntrack_icmpv6_timeout",
822 .maxlen = sizeof(unsigned int),
823 .mode = 0644,
824 .proc_handler = proc_dointvec_jiffies,
825 },
826 #ifdef CONFIG_NF_CT_PROTO_SCTP
827 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED] = {
828 .procname = "nf_conntrack_sctp_timeout_closed",
829 .maxlen = sizeof(unsigned int),
830 .mode = 0644,
831 .proc_handler = proc_dointvec_jiffies,
832 },
833 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT] = {
834 .procname = "nf_conntrack_sctp_timeout_cookie_wait",
835 .maxlen = sizeof(unsigned int),
836 .mode = 0644,
837 .proc_handler = proc_dointvec_jiffies,
838 },
839 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED] = {
840 .procname = "nf_conntrack_sctp_timeout_cookie_echoed",
841 .maxlen = sizeof(unsigned int),
842 .mode = 0644,
843 .proc_handler = proc_dointvec_jiffies,
844 },
845 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED] = {
846 .procname = "nf_conntrack_sctp_timeout_established",
847 .maxlen = sizeof(unsigned int),
848 .mode = 0644,
849 .proc_handler = proc_dointvec_jiffies,
850 },
851 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT] = {
852 .procname = "nf_conntrack_sctp_timeout_shutdown_sent",
853 .maxlen = sizeof(unsigned int),
854 .mode = 0644,
855 .proc_handler = proc_dointvec_jiffies,
856 },
857 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD] = {
858 .procname = "nf_conntrack_sctp_timeout_shutdown_recd",
859 .maxlen = sizeof(unsigned int),
860 .mode = 0644,
861 .proc_handler = proc_dointvec_jiffies,
862 },
863 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT] = {
864 .procname = "nf_conntrack_sctp_timeout_shutdown_ack_sent",
865 .maxlen = sizeof(unsigned int),
866 .mode = 0644,
867 .proc_handler = proc_dointvec_jiffies,
868 },
869 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT] = {
870 .procname = "nf_conntrack_sctp_timeout_heartbeat_sent",
871 .maxlen = sizeof(unsigned int),
872 .mode = 0644,
873 .proc_handler = proc_dointvec_jiffies,
874 },
875 #endif
876 #ifdef CONFIG_NF_CT_PROTO_DCCP
877 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST] = {
878 .procname = "nf_conntrack_dccp_timeout_request",
879 .maxlen = sizeof(unsigned int),
880 .mode = 0644,
881 .proc_handler = proc_dointvec_jiffies,
882 },
883 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND] = {
884 .procname = "nf_conntrack_dccp_timeout_respond",
885 .maxlen = sizeof(unsigned int),
886 .mode = 0644,
887 .proc_handler = proc_dointvec_jiffies,
888 },
889 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN] = {
890 .procname = "nf_conntrack_dccp_timeout_partopen",
891 .maxlen = sizeof(unsigned int),
892 .mode = 0644,
893 .proc_handler = proc_dointvec_jiffies,
894 },
895 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN] = {
896 .procname = "nf_conntrack_dccp_timeout_open",
897 .maxlen = sizeof(unsigned int),
898 .mode = 0644,
899 .proc_handler = proc_dointvec_jiffies,
900 },
901 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ] = {
902 .procname = "nf_conntrack_dccp_timeout_closereq",
903 .maxlen = sizeof(unsigned int),
904 .mode = 0644,
905 .proc_handler = proc_dointvec_jiffies,
906 },
907 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING] = {
908 .procname = "nf_conntrack_dccp_timeout_closing",
909 .maxlen = sizeof(unsigned int),
910 .mode = 0644,
911 .proc_handler = proc_dointvec_jiffies,
912 },
913 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT] = {
914 .procname = "nf_conntrack_dccp_timeout_timewait",
915 .maxlen = sizeof(unsigned int),
916 .mode = 0644,
917 .proc_handler = proc_dointvec_jiffies,
918 },
919 [NF_SYSCTL_CT_PROTO_DCCP_LOOSE] = {
920 .procname = "nf_conntrack_dccp_loose",
921 .maxlen = sizeof(u8),
922 .mode = 0644,
923 .proc_handler = proc_dou8vec_minmax,
924 .extra1 = SYSCTL_ZERO,
925 .extra2 = SYSCTL_ONE,
926 },
927 #endif
928 #ifdef CONFIG_NF_CT_PROTO_GRE
929 [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE] = {
930 .procname = "nf_conntrack_gre_timeout",
931 .maxlen = sizeof(unsigned int),
932 .mode = 0644,
933 .proc_handler = proc_dointvec_jiffies,
934 },
935 [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM] = {
936 .procname = "nf_conntrack_gre_timeout_stream",
937 .maxlen = sizeof(unsigned int),
938 .mode = 0644,
939 .proc_handler = proc_dointvec_jiffies,
940 },
941 #endif
942 };
943
944 static struct ctl_table nf_ct_netfilter_table[] = {
945 {
946 .procname = "nf_conntrack_max",
947 .data = &nf_conntrack_max,
948 .maxlen = sizeof(int),
949 .mode = 0644,
950 .proc_handler = proc_dointvec,
951 },
952 };
953
nf_conntrack_standalone_init_tcp_sysctl(struct net * net,struct ctl_table * table)954 static void nf_conntrack_standalone_init_tcp_sysctl(struct net *net,
955 struct ctl_table *table)
956 {
957 struct nf_tcp_net *tn = nf_tcp_pernet(net);
958
959 #define XASSIGN(XNAME, tn) \
960 table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ ## XNAME].data = \
961 &(tn)->timeouts[TCP_CONNTRACK_ ## XNAME]
962
963 XASSIGN(SYN_SENT, tn);
964 XASSIGN(SYN_RECV, tn);
965 XASSIGN(ESTABLISHED, tn);
966 XASSIGN(FIN_WAIT, tn);
967 XASSIGN(CLOSE_WAIT, tn);
968 XASSIGN(LAST_ACK, tn);
969 XASSIGN(TIME_WAIT, tn);
970 XASSIGN(CLOSE, tn);
971 XASSIGN(RETRANS, tn);
972 XASSIGN(UNACK, tn);
973 #undef XASSIGN
974 #define XASSIGN(XNAME, rval) \
975 table[NF_SYSCTL_CT_PROTO_TCP_ ## XNAME].data = (rval)
976
977 XASSIGN(LOOSE, &tn->tcp_loose);
978 XASSIGN(LIBERAL, &tn->tcp_be_liberal);
979 XASSIGN(MAX_RETRANS, &tn->tcp_max_retrans);
980 XASSIGN(IGNORE_INVALID_RST, &tn->tcp_ignore_invalid_rst);
981 #undef XASSIGN
982
983 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
984 table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_OFFLOAD].data = &tn->offload_timeout;
985 #endif
986
987 }
988
nf_conntrack_standalone_init_sctp_sysctl(struct net * net,struct ctl_table * table)989 static void nf_conntrack_standalone_init_sctp_sysctl(struct net *net,
990 struct ctl_table *table)
991 {
992 #ifdef CONFIG_NF_CT_PROTO_SCTP
993 struct nf_sctp_net *sn = nf_sctp_pernet(net);
994
995 #define XASSIGN(XNAME, sn) \
996 table[NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ ## XNAME].data = \
997 &(sn)->timeouts[SCTP_CONNTRACK_ ## XNAME]
998
999 XASSIGN(CLOSED, sn);
1000 XASSIGN(COOKIE_WAIT, sn);
1001 XASSIGN(COOKIE_ECHOED, sn);
1002 XASSIGN(ESTABLISHED, sn);
1003 XASSIGN(SHUTDOWN_SENT, sn);
1004 XASSIGN(SHUTDOWN_RECD, sn);
1005 XASSIGN(SHUTDOWN_ACK_SENT, sn);
1006 XASSIGN(HEARTBEAT_SENT, sn);
1007 #undef XASSIGN
1008 #endif
1009 }
1010
nf_conntrack_standalone_init_dccp_sysctl(struct net * net,struct ctl_table * table)1011 static void nf_conntrack_standalone_init_dccp_sysctl(struct net *net,
1012 struct ctl_table *table)
1013 {
1014 #ifdef CONFIG_NF_CT_PROTO_DCCP
1015 struct nf_dccp_net *dn = nf_dccp_pernet(net);
1016
1017 #define XASSIGN(XNAME, dn) \
1018 table[NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_ ## XNAME].data = \
1019 &(dn)->dccp_timeout[CT_DCCP_ ## XNAME]
1020
1021 XASSIGN(REQUEST, dn);
1022 XASSIGN(RESPOND, dn);
1023 XASSIGN(PARTOPEN, dn);
1024 XASSIGN(OPEN, dn);
1025 XASSIGN(CLOSEREQ, dn);
1026 XASSIGN(CLOSING, dn);
1027 XASSIGN(TIMEWAIT, dn);
1028 #undef XASSIGN
1029
1030 table[NF_SYSCTL_CT_PROTO_DCCP_LOOSE].data = &dn->dccp_loose;
1031 #endif
1032 }
1033
nf_conntrack_standalone_init_gre_sysctl(struct net * net,struct ctl_table * table)1034 static void nf_conntrack_standalone_init_gre_sysctl(struct net *net,
1035 struct ctl_table *table)
1036 {
1037 #ifdef CONFIG_NF_CT_PROTO_GRE
1038 struct nf_gre_net *gn = nf_gre_pernet(net);
1039
1040 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE].data = &gn->timeouts[GRE_CT_UNREPLIED];
1041 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM].data = &gn->timeouts[GRE_CT_REPLIED];
1042 #endif
1043 }
1044
nf_conntrack_standalone_init_sysctl(struct net * net)1045 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1046 {
1047 struct nf_conntrack_net *cnet = nf_ct_pernet(net);
1048 struct nf_udp_net *un = nf_udp_pernet(net);
1049 struct ctl_table *table;
1050
1051 BUILD_BUG_ON(ARRAY_SIZE(nf_ct_sysctl_table) != NF_SYSCTL_CT_LAST_SYSCTL);
1052
1053 table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table),
1054 GFP_KERNEL);
1055 if (!table)
1056 return -ENOMEM;
1057
1058 table[NF_SYSCTL_CT_COUNT].data = &cnet->count;
1059 table[NF_SYSCTL_CT_CHECKSUM].data = &net->ct.sysctl_checksum;
1060 table[NF_SYSCTL_CT_LOG_INVALID].data = &net->ct.sysctl_log_invalid;
1061 table[NF_SYSCTL_CT_ACCT].data = &net->ct.sysctl_acct;
1062 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1063 table[NF_SYSCTL_CT_EVENTS].data = &net->ct.sysctl_events;
1064 #endif
1065 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
1066 table[NF_SYSCTL_CT_TIMESTAMP].data = &net->ct.sysctl_tstamp;
1067 #endif
1068 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC].data = &nf_generic_pernet(net)->timeout;
1069 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP].data = &nf_icmp_pernet(net)->timeout;
1070 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6].data = &nf_icmpv6_pernet(net)->timeout;
1071 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP].data = &un->timeouts[UDP_CT_UNREPLIED];
1072 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM].data = &un->timeouts[UDP_CT_REPLIED];
1073 #if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
1074 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_OFFLOAD].data = &un->offload_timeout;
1075 #endif
1076
1077 nf_conntrack_standalone_init_tcp_sysctl(net, table);
1078 nf_conntrack_standalone_init_sctp_sysctl(net, table);
1079 nf_conntrack_standalone_init_dccp_sysctl(net, table);
1080 nf_conntrack_standalone_init_gre_sysctl(net, table);
1081
1082 /* Don't allow non-init_net ns to alter global sysctls */
1083 if (!net_eq(&init_net, net)) {
1084 table[NF_SYSCTL_CT_MAX].mode = 0444;
1085 table[NF_SYSCTL_CT_EXPECT_MAX].mode = 0444;
1086 table[NF_SYSCTL_CT_BUCKETS].mode = 0444;
1087 }
1088
1089 cnet->sysctl_header = register_net_sysctl_sz(net, "net/netfilter",
1090 table,
1091 ARRAY_SIZE(nf_ct_sysctl_table));
1092 if (!cnet->sysctl_header)
1093 goto out_unregister_netfilter;
1094
1095 return 0;
1096
1097 out_unregister_netfilter:
1098 kfree(table);
1099 return -ENOMEM;
1100 }
1101
nf_conntrack_standalone_fini_sysctl(struct net * net)1102 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1103 {
1104 struct nf_conntrack_net *cnet = nf_ct_pernet(net);
1105 const struct ctl_table *table;
1106
1107 table = cnet->sysctl_header->ctl_table_arg;
1108 unregister_net_sysctl_table(cnet->sysctl_header);
1109 kfree(table);
1110 }
1111 #else
nf_conntrack_standalone_init_sysctl(struct net * net)1112 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1113 {
1114 return 0;
1115 }
1116
nf_conntrack_standalone_fini_sysctl(struct net * net)1117 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1118 {
1119 }
1120 #endif /* CONFIG_SYSCTL */
1121
nf_conntrack_fini_net(struct net * net)1122 static void nf_conntrack_fini_net(struct net *net)
1123 {
1124 if (enable_hooks)
1125 nf_ct_netns_put(net, NFPROTO_INET);
1126
1127 nf_conntrack_standalone_fini_proc(net);
1128 nf_conntrack_standalone_fini_sysctl(net);
1129 }
1130
nf_conntrack_pernet_init(struct net * net)1131 static int nf_conntrack_pernet_init(struct net *net)
1132 {
1133 int ret;
1134
1135 net->ct.sysctl_checksum = 1;
1136
1137 ret = nf_conntrack_standalone_init_sysctl(net);
1138 if (ret < 0)
1139 return ret;
1140
1141 ret = nf_conntrack_standalone_init_proc(net);
1142 if (ret < 0)
1143 goto out_proc;
1144
1145 ret = nf_conntrack_init_net(net);
1146 if (ret < 0)
1147 goto out_init_net;
1148
1149 if (enable_hooks) {
1150 ret = nf_ct_netns_get(net, NFPROTO_INET);
1151 if (ret < 0)
1152 goto out_hooks;
1153 }
1154
1155 return 0;
1156
1157 out_hooks:
1158 nf_conntrack_cleanup_net(net);
1159 out_init_net:
1160 nf_conntrack_standalone_fini_proc(net);
1161 out_proc:
1162 nf_conntrack_standalone_fini_sysctl(net);
1163 return ret;
1164 }
1165
nf_conntrack_pernet_exit(struct list_head * net_exit_list)1166 static void nf_conntrack_pernet_exit(struct list_head *net_exit_list)
1167 {
1168 struct net *net;
1169
1170 list_for_each_entry(net, net_exit_list, exit_list)
1171 nf_conntrack_fini_net(net);
1172
1173 nf_conntrack_cleanup_net_list(net_exit_list);
1174 }
1175
1176 static struct pernet_operations nf_conntrack_net_ops = {
1177 .init = nf_conntrack_pernet_init,
1178 .exit_batch = nf_conntrack_pernet_exit,
1179 .id = &nf_conntrack_net_id,
1180 .size = sizeof(struct nf_conntrack_net),
1181 };
1182
nf_conntrack_standalone_init(void)1183 static int __init nf_conntrack_standalone_init(void)
1184 {
1185 int ret = nf_conntrack_init_start();
1186 if (ret < 0)
1187 goto out_start;
1188
1189 BUILD_BUG_ON(NFCT_INFOMASK <= IP_CT_NUMBER);
1190
1191 #ifdef CONFIG_SYSCTL
1192 nf_ct_netfilter_header =
1193 register_net_sysctl(&init_net, "net", nf_ct_netfilter_table);
1194 if (!nf_ct_netfilter_header) {
1195 pr_err("nf_conntrack: can't register to sysctl.\n");
1196 ret = -ENOMEM;
1197 goto out_sysctl;
1198 }
1199
1200 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
1201 #endif
1202
1203 nf_conntrack_init_end();
1204
1205 ret = register_pernet_subsys(&nf_conntrack_net_ops);
1206 if (ret < 0)
1207 goto out_pernet;
1208
1209 return 0;
1210
1211 out_pernet:
1212 #ifdef CONFIG_SYSCTL
1213 unregister_net_sysctl_table(nf_ct_netfilter_header);
1214 out_sysctl:
1215 #endif
1216 nf_conntrack_cleanup_end();
1217 out_start:
1218 return ret;
1219 }
1220
nf_conntrack_standalone_fini(void)1221 static void __exit nf_conntrack_standalone_fini(void)
1222 {
1223 nf_conntrack_cleanup_start();
1224 unregister_pernet_subsys(&nf_conntrack_net_ops);
1225 #ifdef CONFIG_SYSCTL
1226 unregister_net_sysctl_table(nf_ct_netfilter_header);
1227 #endif
1228 nf_conntrack_cleanup_end();
1229 }
1230
1231 module_init(nf_conntrack_standalone_init);
1232 module_exit(nf_conntrack_standalone_fini);
1233