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 int ret;
176 u32 len;
177 char *secctx;
178
179 ret = security_secid_to_secctx(ct->secmark, &secctx, &len);
180 if (ret)
181 return;
182
183 seq_printf(s, "secctx=%s ", secctx);
184
185 security_release_secctx(secctx, len);
186 }
187 #else
ct_show_secctx(struct seq_file * s,const struct nf_conn * ct)188 static inline void ct_show_secctx(struct seq_file *s, const struct nf_conn *ct)
189 {
190 }
191 #endif
192
193 #ifdef CONFIG_NF_CONNTRACK_ZONES
ct_show_zone(struct seq_file * s,const struct nf_conn * ct,int dir)194 static void ct_show_zone(struct seq_file *s, const struct nf_conn *ct,
195 int dir)
196 {
197 const struct nf_conntrack_zone *zone = nf_ct_zone(ct);
198
199 if (zone->dir != dir)
200 return;
201 switch (zone->dir) {
202 case NF_CT_DEFAULT_ZONE_DIR:
203 seq_printf(s, "zone=%u ", zone->id);
204 break;
205 case NF_CT_ZONE_DIR_ORIG:
206 seq_printf(s, "zone-orig=%u ", zone->id);
207 break;
208 case NF_CT_ZONE_DIR_REPL:
209 seq_printf(s, "zone-reply=%u ", zone->id);
210 break;
211 default:
212 break;
213 }
214 }
215 #else
ct_show_zone(struct seq_file * s,const struct nf_conn * ct,int dir)216 static inline void ct_show_zone(struct seq_file *s, const struct nf_conn *ct,
217 int dir)
218 {
219 }
220 #endif
221
222 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
ct_show_delta_time(struct seq_file * s,const struct nf_conn * ct)223 static void ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct)
224 {
225 struct ct_iter_state *st = s->private;
226 struct nf_conn_tstamp *tstamp;
227 s64 delta_time;
228
229 tstamp = nf_conn_tstamp_find(ct);
230 if (tstamp) {
231 delta_time = st->time_now - tstamp->start;
232 if (delta_time > 0)
233 delta_time = div_s64(delta_time, NSEC_PER_SEC);
234 else
235 delta_time = 0;
236
237 seq_printf(s, "delta-time=%llu ",
238 (unsigned long long)delta_time);
239 }
240 return;
241 }
242 #else
243 static inline void
ct_show_delta_time(struct seq_file * s,const struct nf_conn * ct)244 ct_show_delta_time(struct seq_file *s, const struct nf_conn *ct)
245 {
246 }
247 #endif
248
l3proto_name(u16 proto)249 static const char* l3proto_name(u16 proto)
250 {
251 switch (proto) {
252 case AF_INET: return "ipv4";
253 case AF_INET6: return "ipv6";
254 }
255
256 return "unknown";
257 }
258
l4proto_name(u16 proto)259 static const char* l4proto_name(u16 proto)
260 {
261 switch (proto) {
262 case IPPROTO_ICMP: return "icmp";
263 case IPPROTO_TCP: return "tcp";
264 case IPPROTO_UDP: return "udp";
265 case IPPROTO_DCCP: return "dccp";
266 case IPPROTO_GRE: return "gre";
267 case IPPROTO_SCTP: return "sctp";
268 case IPPROTO_UDPLITE: return "udplite";
269 case IPPROTO_ICMPV6: return "icmpv6";
270 }
271
272 return "unknown";
273 }
274
275 static unsigned int
seq_print_acct(struct seq_file * s,const struct nf_conn * ct,int dir)276 seq_print_acct(struct seq_file *s, const struct nf_conn *ct, int dir)
277 {
278 struct nf_conn_acct *acct;
279 struct nf_conn_counter *counter;
280
281 acct = nf_conn_acct_find(ct);
282 if (!acct)
283 return 0;
284
285 counter = acct->counter;
286 seq_printf(s, "packets=%llu bytes=%llu ",
287 (unsigned long long)atomic64_read(&counter[dir].packets),
288 (unsigned long long)atomic64_read(&counter[dir].bytes));
289
290 return 0;
291 }
292
293 /* return 0 on success, 1 in case of error */
ct_seq_show(struct seq_file * s,void * v)294 static int ct_seq_show(struct seq_file *s, void *v)
295 {
296 struct nf_conntrack_tuple_hash *hash = v;
297 struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
298 const struct nf_conntrack_l4proto *l4proto;
299 struct net *net = seq_file_net(s);
300 int ret = 0;
301
302 WARN_ON(!ct);
303 if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use)))
304 return 0;
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 if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL))
340 goto release;
341
342 if (!(test_bit(IPS_SEEN_REPLY_BIT, &ct->status)))
343 seq_puts(s, "[UNREPLIED] ");
344
345 print_tuple(s, &ct->tuplehash[IP_CT_DIR_REPLY].tuple, l4proto);
346
347 ct_show_zone(s, ct, NF_CT_ZONE_DIR_REPL);
348
349 if (seq_print_acct(s, ct, IP_CT_DIR_REPLY))
350 goto release;
351
352 if (test_bit(IPS_HW_OFFLOAD_BIT, &ct->status))
353 seq_puts(s, "[HW_OFFLOAD] ");
354 else if (test_bit(IPS_OFFLOAD_BIT, &ct->status))
355 seq_puts(s, "[OFFLOAD] ");
356 else if (test_bit(IPS_ASSURED_BIT, &ct->status))
357 seq_puts(s, "[ASSURED] ");
358
359 if (seq_has_overflowed(s))
360 goto release;
361
362 #if defined(CONFIG_NF_CONNTRACK_MARK)
363 seq_printf(s, "mark=%u ", READ_ONCE(ct->mark));
364 #endif
365
366 ct_show_secctx(s, ct);
367 ct_show_zone(s, ct, NF_CT_DEFAULT_ZONE_DIR);
368 ct_show_delta_time(s, ct);
369
370 seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use));
371
372 if (seq_has_overflowed(s))
373 goto release;
374
375 ret = 0;
376 release:
377 nf_ct_put(ct);
378 return ret;
379 }
380
381 static const struct seq_operations ct_seq_ops = {
382 .start = ct_seq_start,
383 .next = ct_seq_next,
384 .stop = ct_seq_stop,
385 .show = ct_seq_show
386 };
387
ct_cpu_seq_start(struct seq_file * seq,loff_t * pos)388 static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
389 {
390 struct net *net = seq_file_net(seq);
391 int cpu;
392
393 if (*pos == 0)
394 return SEQ_START_TOKEN;
395
396 for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) {
397 if (!cpu_possible(cpu))
398 continue;
399 *pos = cpu + 1;
400 return per_cpu_ptr(net->ct.stat, cpu);
401 }
402
403 return NULL;
404 }
405
ct_cpu_seq_next(struct seq_file * seq,void * v,loff_t * pos)406 static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
407 {
408 struct net *net = seq_file_net(seq);
409 int cpu;
410
411 for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) {
412 if (!cpu_possible(cpu))
413 continue;
414 *pos = cpu + 1;
415 return per_cpu_ptr(net->ct.stat, cpu);
416 }
417 (*pos)++;
418 return NULL;
419 }
420
ct_cpu_seq_stop(struct seq_file * seq,void * v)421 static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
422 {
423 }
424
ct_cpu_seq_show(struct seq_file * seq,void * v)425 static int ct_cpu_seq_show(struct seq_file *seq, void *v)
426 {
427 struct net *net = seq_file_net(seq);
428 unsigned int nr_conntracks = atomic_read(&net->ct.count);
429 const struct ip_conntrack_stat *st = v;
430
431 if (v == SEQ_START_TOKEN) {
432 seq_puts(seq, "entries clashres found new invalid ignore delete delete_list insert insert_failed drop early_drop icmp_error expect_new expect_create expect_delete search_restart\n");
433 return 0;
434 }
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 0,
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
511 /* Sysctl support */
512
513 #ifdef CONFIG_SYSCTL
514 /* Log invalid packets of a given protocol */
515 static int log_invalid_proto_min __read_mostly;
516 static int log_invalid_proto_max __read_mostly = 255;
517
518 /* size the user *wants to set */
519 static unsigned int nf_conntrack_htable_size_user __read_mostly;
520
521 static int
nf_conntrack_hash_sysctl(struct ctl_table * table,int write,void * buffer,size_t * lenp,loff_t * ppos)522 nf_conntrack_hash_sysctl(struct ctl_table *table, int write,
523 void *buffer, size_t *lenp, loff_t *ppos)
524 {
525 int ret;
526
527 /* module_param hashsize could have changed value */
528 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
529
530 ret = proc_dointvec(table, write, buffer, lenp, ppos);
531 if (ret < 0 || !write)
532 return ret;
533
534 /* update ret, we might not be able to satisfy request */
535 ret = nf_conntrack_hash_resize(nf_conntrack_htable_size_user);
536
537 /* update it to the actual value used by conntrack */
538 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
539 return ret;
540 }
541
542 static struct ctl_table_header *nf_ct_netfilter_header;
543
544 enum nf_ct_sysctl_index {
545 NF_SYSCTL_CT_MAX,
546 NF_SYSCTL_CT_COUNT,
547 NF_SYSCTL_CT_BUCKETS,
548 NF_SYSCTL_CT_CHECKSUM,
549 NF_SYSCTL_CT_LOG_INVALID,
550 NF_SYSCTL_CT_EXPECT_MAX,
551 NF_SYSCTL_CT_ACCT,
552 NF_SYSCTL_CT_HELPER,
553 #ifdef CONFIG_NF_CONNTRACK_EVENTS
554 NF_SYSCTL_CT_EVENTS,
555 #endif
556 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
557 NF_SYSCTL_CT_TIMESTAMP,
558 #endif
559 NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC,
560 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT,
561 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV,
562 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED,
563 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT,
564 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT,
565 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK,
566 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT,
567 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE,
568 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS,
569 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK,
570 NF_SYSCTL_CT_PROTO_TCP_LOOSE,
571 NF_SYSCTL_CT_PROTO_TCP_LIBERAL,
572 NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS,
573 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP,
574 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM,
575 NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP,
576 NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6,
577 #ifdef CONFIG_NF_CT_PROTO_SCTP
578 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED,
579 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT,
580 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED,
581 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED,
582 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT,
583 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD,
584 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT,
585 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT,
586 #endif
587 #ifdef CONFIG_NF_CT_PROTO_DCCP
588 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST,
589 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND,
590 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN,
591 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN,
592 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ,
593 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING,
594 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT,
595 NF_SYSCTL_CT_PROTO_DCCP_LOOSE,
596 #endif
597 #ifdef CONFIG_NF_CT_PROTO_GRE
598 NF_SYSCTL_CT_PROTO_TIMEOUT_GRE,
599 NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM,
600 #endif
601
602 __NF_SYSCTL_CT_LAST_SYSCTL,
603 };
604
605 #define NF_SYSCTL_CT_LAST_SYSCTL (__NF_SYSCTL_CT_LAST_SYSCTL + 1)
606
607 static struct ctl_table nf_ct_sysctl_table[] = {
608 [NF_SYSCTL_CT_MAX] = {
609 .procname = "nf_conntrack_max",
610 .data = &nf_conntrack_max,
611 .maxlen = sizeof(int),
612 .mode = 0644,
613 .proc_handler = proc_dointvec,
614 },
615 [NF_SYSCTL_CT_COUNT] = {
616 .procname = "nf_conntrack_count",
617 .data = &init_net.ct.count,
618 .maxlen = sizeof(int),
619 .mode = 0444,
620 .proc_handler = proc_dointvec,
621 },
622 [NF_SYSCTL_CT_BUCKETS] = {
623 .procname = "nf_conntrack_buckets",
624 .data = &nf_conntrack_htable_size_user,
625 .maxlen = sizeof(unsigned int),
626 .mode = 0644,
627 .proc_handler = nf_conntrack_hash_sysctl,
628 },
629 [NF_SYSCTL_CT_CHECKSUM] = {
630 .procname = "nf_conntrack_checksum",
631 .data = &init_net.ct.sysctl_checksum,
632 .maxlen = sizeof(int),
633 .mode = 0644,
634 .proc_handler = proc_dointvec_minmax,
635 .extra1 = SYSCTL_ZERO,
636 .extra2 = SYSCTL_ONE,
637 },
638 [NF_SYSCTL_CT_LOG_INVALID] = {
639 .procname = "nf_conntrack_log_invalid",
640 .data = &init_net.ct.sysctl_log_invalid,
641 .maxlen = sizeof(unsigned int),
642 .mode = 0644,
643 .proc_handler = proc_dointvec_minmax,
644 .extra1 = &log_invalid_proto_min,
645 .extra2 = &log_invalid_proto_max,
646 },
647 [NF_SYSCTL_CT_EXPECT_MAX] = {
648 .procname = "nf_conntrack_expect_max",
649 .data = &nf_ct_expect_max,
650 .maxlen = sizeof(int),
651 .mode = 0644,
652 .proc_handler = proc_dointvec,
653 },
654 [NF_SYSCTL_CT_ACCT] = {
655 .procname = "nf_conntrack_acct",
656 .data = &init_net.ct.sysctl_acct,
657 .maxlen = sizeof(int),
658 .mode = 0644,
659 .proc_handler = proc_dointvec_minmax,
660 .extra1 = SYSCTL_ZERO,
661 .extra2 = SYSCTL_ONE,
662 },
663 [NF_SYSCTL_CT_HELPER] = {
664 .procname = "nf_conntrack_helper",
665 .data = &init_net.ct.sysctl_auto_assign_helper,
666 .maxlen = sizeof(int),
667 .mode = 0644,
668 .proc_handler = proc_dointvec_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(int),
677 .mode = 0644,
678 .proc_handler = proc_dointvec_minmax,
679 .extra1 = SYSCTL_ZERO,
680 .extra2 = SYSCTL_ONE,
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(int),
688 .mode = 0644,
689 .proc_handler = proc_dointvec_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 [NF_SYSCTL_CT_PROTO_TCP_LOOSE] = {
761 .procname = "nf_conntrack_tcp_loose",
762 .maxlen = sizeof(int),
763 .mode = 0644,
764 .proc_handler = proc_dointvec_minmax,
765 .extra1 = SYSCTL_ZERO,
766 .extra2 = SYSCTL_ONE,
767 },
768 [NF_SYSCTL_CT_PROTO_TCP_LIBERAL] = {
769 .procname = "nf_conntrack_tcp_be_liberal",
770 .maxlen = sizeof(int),
771 .mode = 0644,
772 .proc_handler = proc_dointvec_minmax,
773 .extra1 = SYSCTL_ZERO,
774 .extra2 = SYSCTL_ONE,
775 },
776 [NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS] = {
777 .procname = "nf_conntrack_tcp_max_retrans",
778 .maxlen = sizeof(unsigned int),
779 .mode = 0644,
780 .proc_handler = proc_dointvec,
781 },
782 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP] = {
783 .procname = "nf_conntrack_udp_timeout",
784 .maxlen = sizeof(unsigned int),
785 .mode = 0644,
786 .proc_handler = proc_dointvec_jiffies,
787 },
788 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM] = {
789 .procname = "nf_conntrack_udp_timeout_stream",
790 .maxlen = sizeof(unsigned int),
791 .mode = 0644,
792 .proc_handler = proc_dointvec_jiffies,
793 },
794 [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP] = {
795 .procname = "nf_conntrack_icmp_timeout",
796 .maxlen = sizeof(unsigned int),
797 .mode = 0644,
798 .proc_handler = proc_dointvec_jiffies,
799 },
800 [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6] = {
801 .procname = "nf_conntrack_icmpv6_timeout",
802 .maxlen = sizeof(unsigned int),
803 .mode = 0644,
804 .proc_handler = proc_dointvec_jiffies,
805 },
806 #ifdef CONFIG_NF_CT_PROTO_SCTP
807 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED] = {
808 .procname = "nf_conntrack_sctp_timeout_closed",
809 .maxlen = sizeof(unsigned int),
810 .mode = 0644,
811 .proc_handler = proc_dointvec_jiffies,
812 },
813 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT] = {
814 .procname = "nf_conntrack_sctp_timeout_cookie_wait",
815 .maxlen = sizeof(unsigned int),
816 .mode = 0644,
817 .proc_handler = proc_dointvec_jiffies,
818 },
819 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED] = {
820 .procname = "nf_conntrack_sctp_timeout_cookie_echoed",
821 .maxlen = sizeof(unsigned int),
822 .mode = 0644,
823 .proc_handler = proc_dointvec_jiffies,
824 },
825 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED] = {
826 .procname = "nf_conntrack_sctp_timeout_established",
827 .maxlen = sizeof(unsigned int),
828 .mode = 0644,
829 .proc_handler = proc_dointvec_jiffies,
830 },
831 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT] = {
832 .procname = "nf_conntrack_sctp_timeout_shutdown_sent",
833 .maxlen = sizeof(unsigned int),
834 .mode = 0644,
835 .proc_handler = proc_dointvec_jiffies,
836 },
837 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD] = {
838 .procname = "nf_conntrack_sctp_timeout_shutdown_recd",
839 .maxlen = sizeof(unsigned int),
840 .mode = 0644,
841 .proc_handler = proc_dointvec_jiffies,
842 },
843 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT] = {
844 .procname = "nf_conntrack_sctp_timeout_shutdown_ack_sent",
845 .maxlen = sizeof(unsigned int),
846 .mode = 0644,
847 .proc_handler = proc_dointvec_jiffies,
848 },
849 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT] = {
850 .procname = "nf_conntrack_sctp_timeout_heartbeat_sent",
851 .maxlen = sizeof(unsigned int),
852 .mode = 0644,
853 .proc_handler = proc_dointvec_jiffies,
854 },
855 #endif
856 #ifdef CONFIG_NF_CT_PROTO_DCCP
857 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST] = {
858 .procname = "nf_conntrack_dccp_timeout_request",
859 .maxlen = sizeof(unsigned int),
860 .mode = 0644,
861 .proc_handler = proc_dointvec_jiffies,
862 },
863 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND] = {
864 .procname = "nf_conntrack_dccp_timeout_respond",
865 .maxlen = sizeof(unsigned int),
866 .mode = 0644,
867 .proc_handler = proc_dointvec_jiffies,
868 },
869 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN] = {
870 .procname = "nf_conntrack_dccp_timeout_partopen",
871 .maxlen = sizeof(unsigned int),
872 .mode = 0644,
873 .proc_handler = proc_dointvec_jiffies,
874 },
875 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN] = {
876 .procname = "nf_conntrack_dccp_timeout_open",
877 .maxlen = sizeof(unsigned int),
878 .mode = 0644,
879 .proc_handler = proc_dointvec_jiffies,
880 },
881 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ] = {
882 .procname = "nf_conntrack_dccp_timeout_closereq",
883 .maxlen = sizeof(unsigned int),
884 .mode = 0644,
885 .proc_handler = proc_dointvec_jiffies,
886 },
887 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING] = {
888 .procname = "nf_conntrack_dccp_timeout_closing",
889 .maxlen = sizeof(unsigned int),
890 .mode = 0644,
891 .proc_handler = proc_dointvec_jiffies,
892 },
893 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT] = {
894 .procname = "nf_conntrack_dccp_timeout_timewait",
895 .maxlen = sizeof(unsigned int),
896 .mode = 0644,
897 .proc_handler = proc_dointvec_jiffies,
898 },
899 [NF_SYSCTL_CT_PROTO_DCCP_LOOSE] = {
900 .procname = "nf_conntrack_dccp_loose",
901 .maxlen = sizeof(int),
902 .mode = 0644,
903 .proc_handler = proc_dointvec_minmax,
904 .extra1 = SYSCTL_ZERO,
905 .extra2 = SYSCTL_ONE,
906 },
907 #endif
908 #ifdef CONFIG_NF_CT_PROTO_GRE
909 [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE] = {
910 .procname = "nf_conntrack_gre_timeout",
911 .maxlen = sizeof(unsigned int),
912 .mode = 0644,
913 .proc_handler = proc_dointvec_jiffies,
914 },
915 [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM] = {
916 .procname = "nf_conntrack_gre_timeout_stream",
917 .maxlen = sizeof(unsigned int),
918 .mode = 0644,
919 .proc_handler = proc_dointvec_jiffies,
920 },
921 #endif
922 {}
923 };
924
925 static struct ctl_table nf_ct_netfilter_table[] = {
926 {
927 .procname = "nf_conntrack_max",
928 .data = &nf_conntrack_max,
929 .maxlen = sizeof(int),
930 .mode = 0644,
931 .proc_handler = proc_dointvec,
932 },
933 { }
934 };
935
nf_conntrack_standalone_init_tcp_sysctl(struct net * net,struct ctl_table * table)936 static void nf_conntrack_standalone_init_tcp_sysctl(struct net *net,
937 struct ctl_table *table)
938 {
939 struct nf_tcp_net *tn = nf_tcp_pernet(net);
940
941 #define XASSIGN(XNAME, tn) \
942 table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ ## XNAME].data = \
943 &(tn)->timeouts[TCP_CONNTRACK_ ## XNAME]
944
945 XASSIGN(SYN_SENT, tn);
946 XASSIGN(SYN_RECV, tn);
947 XASSIGN(ESTABLISHED, tn);
948 XASSIGN(FIN_WAIT, tn);
949 XASSIGN(CLOSE_WAIT, tn);
950 XASSIGN(LAST_ACK, tn);
951 XASSIGN(TIME_WAIT, tn);
952 XASSIGN(CLOSE, tn);
953 XASSIGN(RETRANS, tn);
954 XASSIGN(UNACK, tn);
955 #undef XASSIGN
956 #define XASSIGN(XNAME, rval) \
957 table[NF_SYSCTL_CT_PROTO_TCP_ ## XNAME].data = (rval)
958
959 XASSIGN(LOOSE, &tn->tcp_loose);
960 XASSIGN(LIBERAL, &tn->tcp_be_liberal);
961 XASSIGN(MAX_RETRANS, &tn->tcp_max_retrans);
962 #undef XASSIGN
963 }
964
nf_conntrack_standalone_init_sctp_sysctl(struct net * net,struct ctl_table * table)965 static void nf_conntrack_standalone_init_sctp_sysctl(struct net *net,
966 struct ctl_table *table)
967 {
968 #ifdef CONFIG_NF_CT_PROTO_SCTP
969 struct nf_sctp_net *sn = nf_sctp_pernet(net);
970
971 #define XASSIGN(XNAME, sn) \
972 table[NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ ## XNAME].data = \
973 &(sn)->timeouts[SCTP_CONNTRACK_ ## XNAME]
974
975 XASSIGN(CLOSED, sn);
976 XASSIGN(COOKIE_WAIT, sn);
977 XASSIGN(COOKIE_ECHOED, sn);
978 XASSIGN(ESTABLISHED, sn);
979 XASSIGN(SHUTDOWN_SENT, sn);
980 XASSIGN(SHUTDOWN_RECD, sn);
981 XASSIGN(SHUTDOWN_ACK_SENT, sn);
982 XASSIGN(HEARTBEAT_SENT, sn);
983 #undef XASSIGN
984 #endif
985 }
986
nf_conntrack_standalone_init_dccp_sysctl(struct net * net,struct ctl_table * table)987 static void nf_conntrack_standalone_init_dccp_sysctl(struct net *net,
988 struct ctl_table *table)
989 {
990 #ifdef CONFIG_NF_CT_PROTO_DCCP
991 struct nf_dccp_net *dn = nf_dccp_pernet(net);
992
993 #define XASSIGN(XNAME, dn) \
994 table[NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_ ## XNAME].data = \
995 &(dn)->dccp_timeout[CT_DCCP_ ## XNAME]
996
997 XASSIGN(REQUEST, dn);
998 XASSIGN(RESPOND, dn);
999 XASSIGN(PARTOPEN, dn);
1000 XASSIGN(OPEN, dn);
1001 XASSIGN(CLOSEREQ, dn);
1002 XASSIGN(CLOSING, dn);
1003 XASSIGN(TIMEWAIT, dn);
1004 #undef XASSIGN
1005
1006 table[NF_SYSCTL_CT_PROTO_DCCP_LOOSE].data = &dn->dccp_loose;
1007 #endif
1008 }
1009
nf_conntrack_standalone_init_gre_sysctl(struct net * net,struct ctl_table * table)1010 static void nf_conntrack_standalone_init_gre_sysctl(struct net *net,
1011 struct ctl_table *table)
1012 {
1013 #ifdef CONFIG_NF_CT_PROTO_GRE
1014 struct nf_gre_net *gn = nf_gre_pernet(net);
1015
1016 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE].data = &gn->timeouts[GRE_CT_UNREPLIED];
1017 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM].data = &gn->timeouts[GRE_CT_REPLIED];
1018 #endif
1019 }
1020
nf_conntrack_standalone_init_sysctl(struct net * net)1021 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1022 {
1023 struct nf_udp_net *un = nf_udp_pernet(net);
1024 struct ctl_table *table;
1025
1026 BUILD_BUG_ON(ARRAY_SIZE(nf_ct_sysctl_table) != NF_SYSCTL_CT_LAST_SYSCTL);
1027
1028 table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table),
1029 GFP_KERNEL);
1030 if (!table)
1031 return -ENOMEM;
1032
1033 table[NF_SYSCTL_CT_COUNT].data = &net->ct.count;
1034 table[NF_SYSCTL_CT_CHECKSUM].data = &net->ct.sysctl_checksum;
1035 table[NF_SYSCTL_CT_LOG_INVALID].data = &net->ct.sysctl_log_invalid;
1036 table[NF_SYSCTL_CT_ACCT].data = &net->ct.sysctl_acct;
1037 table[NF_SYSCTL_CT_HELPER].data = &net->ct.sysctl_auto_assign_helper;
1038 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1039 table[NF_SYSCTL_CT_EVENTS].data = &net->ct.sysctl_events;
1040 #endif
1041 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
1042 table[NF_SYSCTL_CT_TIMESTAMP].data = &net->ct.sysctl_tstamp;
1043 #endif
1044 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC].data = &nf_generic_pernet(net)->timeout;
1045 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP].data = &nf_icmp_pernet(net)->timeout;
1046 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6].data = &nf_icmpv6_pernet(net)->timeout;
1047 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP].data = &un->timeouts[UDP_CT_UNREPLIED];
1048 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM].data = &un->timeouts[UDP_CT_REPLIED];
1049
1050 nf_conntrack_standalone_init_tcp_sysctl(net, table);
1051 nf_conntrack_standalone_init_sctp_sysctl(net, table);
1052 nf_conntrack_standalone_init_dccp_sysctl(net, table);
1053 nf_conntrack_standalone_init_gre_sysctl(net, table);
1054
1055 /* Don't allow non-init_net ns to alter global sysctls */
1056 if (!net_eq(&init_net, net)) {
1057 table[NF_SYSCTL_CT_MAX].mode = 0444;
1058 table[NF_SYSCTL_CT_EXPECT_MAX].mode = 0444;
1059 table[NF_SYSCTL_CT_BUCKETS].mode = 0444;
1060 }
1061
1062 net->ct.sysctl_header = register_net_sysctl(net, "net/netfilter", table);
1063 if (!net->ct.sysctl_header)
1064 goto out_unregister_netfilter;
1065
1066 return 0;
1067
1068 out_unregister_netfilter:
1069 kfree(table);
1070 return -ENOMEM;
1071 }
1072
nf_conntrack_standalone_fini_sysctl(struct net * net)1073 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1074 {
1075 struct ctl_table *table;
1076
1077 table = net->ct.sysctl_header->ctl_table_arg;
1078 unregister_net_sysctl_table(net->ct.sysctl_header);
1079 kfree(table);
1080 }
1081 #else
nf_conntrack_standalone_init_sysctl(struct net * net)1082 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1083 {
1084 return 0;
1085 }
1086
nf_conntrack_standalone_fini_sysctl(struct net * net)1087 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1088 {
1089 }
1090 #endif /* CONFIG_SYSCTL */
1091
nf_conntrack_fini_net(struct net * net)1092 static void nf_conntrack_fini_net(struct net *net)
1093 {
1094 if (enable_hooks)
1095 nf_ct_netns_put(net, NFPROTO_INET);
1096
1097 nf_conntrack_standalone_fini_proc(net);
1098 nf_conntrack_standalone_fini_sysctl(net);
1099 }
1100
nf_conntrack_pernet_init(struct net * net)1101 static int nf_conntrack_pernet_init(struct net *net)
1102 {
1103 int ret;
1104
1105 net->ct.sysctl_checksum = 1;
1106
1107 ret = nf_conntrack_standalone_init_sysctl(net);
1108 if (ret < 0)
1109 return ret;
1110
1111 ret = nf_conntrack_standalone_init_proc(net);
1112 if (ret < 0)
1113 goto out_proc;
1114
1115 ret = nf_conntrack_init_net(net);
1116 if (ret < 0)
1117 goto out_init_net;
1118
1119 if (enable_hooks) {
1120 ret = nf_ct_netns_get(net, NFPROTO_INET);
1121 if (ret < 0)
1122 goto out_hooks;
1123 }
1124
1125 return 0;
1126
1127 out_hooks:
1128 nf_conntrack_cleanup_net(net);
1129 out_init_net:
1130 nf_conntrack_standalone_fini_proc(net);
1131 out_proc:
1132 nf_conntrack_standalone_fini_sysctl(net);
1133 return ret;
1134 }
1135
nf_conntrack_pernet_exit(struct list_head * net_exit_list)1136 static void nf_conntrack_pernet_exit(struct list_head *net_exit_list)
1137 {
1138 struct net *net;
1139
1140 list_for_each_entry(net, net_exit_list, exit_list)
1141 nf_conntrack_fini_net(net);
1142
1143 nf_conntrack_cleanup_net_list(net_exit_list);
1144 }
1145
1146 static struct pernet_operations nf_conntrack_net_ops = {
1147 .init = nf_conntrack_pernet_init,
1148 .exit_batch = nf_conntrack_pernet_exit,
1149 .id = &nf_conntrack_net_id,
1150 .size = sizeof(struct nf_conntrack_net),
1151 };
1152
nf_conntrack_standalone_init(void)1153 static int __init nf_conntrack_standalone_init(void)
1154 {
1155 int ret = nf_conntrack_init_start();
1156 if (ret < 0)
1157 goto out_start;
1158
1159 BUILD_BUG_ON(NFCT_INFOMASK <= IP_CT_NUMBER);
1160
1161 #ifdef CONFIG_SYSCTL
1162 nf_ct_netfilter_header =
1163 register_net_sysctl(&init_net, "net", nf_ct_netfilter_table);
1164 if (!nf_ct_netfilter_header) {
1165 pr_err("nf_conntrack: can't register to sysctl.\n");
1166 ret = -ENOMEM;
1167 goto out_sysctl;
1168 }
1169
1170 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
1171 #endif
1172
1173 nf_conntrack_init_end();
1174
1175 ret = register_pernet_subsys(&nf_conntrack_net_ops);
1176 if (ret < 0)
1177 goto out_pernet;
1178
1179 return 0;
1180
1181 out_pernet:
1182 #ifdef CONFIG_SYSCTL
1183 unregister_net_sysctl_table(nf_ct_netfilter_header);
1184 out_sysctl:
1185 #endif
1186 nf_conntrack_cleanup_end();
1187 out_start:
1188 return ret;
1189 }
1190
nf_conntrack_standalone_fini(void)1191 static void __exit nf_conntrack_standalone_fini(void)
1192 {
1193 nf_conntrack_cleanup_start();
1194 unregister_pernet_subsys(&nf_conntrack_net_ops);
1195 #ifdef CONFIG_SYSCTL
1196 unregister_net_sysctl_table(nf_ct_netfilter_header);
1197 #endif
1198 nf_conntrack_cleanup_end();
1199 }
1200
1201 module_init(nf_conntrack_standalone_init);
1202 module_exit(nf_conntrack_standalone_fini);
1203