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 }
270
271 return "unknown";
272 }
273
274 static unsigned int
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 0;
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 return 0;
290 }
291
292 /* return 0 on success, 1 in case of error */
ct_seq_show(struct seq_file * s,void * v)293 static int ct_seq_show(struct seq_file *s, void *v)
294 {
295 struct nf_conntrack_tuple_hash *hash = v;
296 struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(hash);
297 const struct nf_conntrack_l4proto *l4proto;
298 struct net *net = seq_file_net(s);
299 int ret = 0;
300
301 WARN_ON(!ct);
302 if (unlikely(!atomic_inc_not_zero(&ct->ct_general.use)))
303 return 0;
304
305 if (nf_ct_should_gc(ct)) {
306 nf_ct_kill(ct);
307 goto release;
308 }
309
310 /* we only want to print DIR_ORIGINAL */
311 if (NF_CT_DIRECTION(hash))
312 goto release;
313
314 if (!net_eq(nf_ct_net(ct), net))
315 goto release;
316
317 l4proto = nf_ct_l4proto_find(nf_ct_protonum(ct));
318
319 ret = -ENOSPC;
320 seq_printf(s, "%-8s %u %-8s %u ",
321 l3proto_name(nf_ct_l3num(ct)), nf_ct_l3num(ct),
322 l4proto_name(l4proto->l4proto), nf_ct_protonum(ct));
323
324 if (!test_bit(IPS_OFFLOAD_BIT, &ct->status))
325 seq_printf(s, "%ld ", nf_ct_expires(ct) / HZ);
326
327 if (l4proto->print_conntrack)
328 l4proto->print_conntrack(s, ct);
329
330 print_tuple(s, &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
331 l4proto);
332
333 ct_show_zone(s, ct, NF_CT_ZONE_DIR_ORIG);
334
335 if (seq_has_overflowed(s))
336 goto release;
337
338 if (seq_print_acct(s, ct, IP_CT_DIR_ORIGINAL))
339 goto release;
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 if (seq_print_acct(s, ct, IP_CT_DIR_REPLY))
349 goto release;
350
351 if (test_bit(IPS_HW_OFFLOAD_BIT, &ct->status))
352 seq_puts(s, "[HW_OFFLOAD] ");
353 else if (test_bit(IPS_OFFLOAD_BIT, &ct->status))
354 seq_puts(s, "[OFFLOAD] ");
355 else if (test_bit(IPS_ASSURED_BIT, &ct->status))
356 seq_puts(s, "[ASSURED] ");
357
358 if (seq_has_overflowed(s))
359 goto release;
360
361 #if defined(CONFIG_NF_CONNTRACK_MARK)
362 seq_printf(s, "mark=%u ", ct->mark);
363 #endif
364
365 ct_show_secctx(s, ct);
366 ct_show_zone(s, ct, NF_CT_DEFAULT_ZONE_DIR);
367 ct_show_delta_time(s, ct);
368
369 seq_printf(s, "use=%u\n", atomic_read(&ct->ct_general.use));
370
371 if (seq_has_overflowed(s))
372 goto release;
373
374 ret = 0;
375 release:
376 nf_ct_put(ct);
377 return ret;
378 }
379
380 static const struct seq_operations ct_seq_ops = {
381 .start = ct_seq_start,
382 .next = ct_seq_next,
383 .stop = ct_seq_stop,
384 .show = ct_seq_show
385 };
386
ct_cpu_seq_start(struct seq_file * seq,loff_t * pos)387 static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
388 {
389 struct net *net = seq_file_net(seq);
390 int cpu;
391
392 if (*pos == 0)
393 return SEQ_START_TOKEN;
394
395 for (cpu = *pos-1; cpu < nr_cpu_ids; ++cpu) {
396 if (!cpu_possible(cpu))
397 continue;
398 *pos = cpu + 1;
399 return per_cpu_ptr(net->ct.stat, cpu);
400 }
401
402 return NULL;
403 }
404
ct_cpu_seq_next(struct seq_file * seq,void * v,loff_t * pos)405 static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
406 {
407 struct net *net = seq_file_net(seq);
408 int cpu;
409
410 for (cpu = *pos; cpu < nr_cpu_ids; ++cpu) {
411 if (!cpu_possible(cpu))
412 continue;
413 *pos = cpu + 1;
414 return per_cpu_ptr(net->ct.stat, cpu);
415 }
416 (*pos)++;
417 return NULL;
418 }
419
ct_cpu_seq_stop(struct seq_file * seq,void * v)420 static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
421 {
422 }
423
ct_cpu_seq_show(struct seq_file * seq,void * v)424 static int ct_cpu_seq_show(struct seq_file *seq, void *v)
425 {
426 struct net *net = seq_file_net(seq);
427 unsigned int nr_conntracks = atomic_read(&net->ct.count);
428 const struct ip_conntrack_stat *st = v;
429
430 if (v == SEQ_START_TOKEN) {
431 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");
432 return 0;
433 }
434
435 seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
436 "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n",
437 nr_conntracks,
438 st->clash_resolve,
439 st->found,
440 0,
441 st->invalid,
442 0,
443 0,
444 0,
445 st->insert,
446 st->insert_failed,
447 st->drop,
448 st->early_drop,
449 st->error,
450
451 st->expect_new,
452 st->expect_create,
453 st->expect_delete,
454 st->search_restart
455 );
456 return 0;
457 }
458
459 static const struct seq_operations ct_cpu_seq_ops = {
460 .start = ct_cpu_seq_start,
461 .next = ct_cpu_seq_next,
462 .stop = ct_cpu_seq_stop,
463 .show = ct_cpu_seq_show,
464 };
465
nf_conntrack_standalone_init_proc(struct net * net)466 static int nf_conntrack_standalone_init_proc(struct net *net)
467 {
468 struct proc_dir_entry *pde;
469 kuid_t root_uid;
470 kgid_t root_gid;
471
472 pde = proc_create_net("nf_conntrack", 0440, net->proc_net, &ct_seq_ops,
473 sizeof(struct ct_iter_state));
474 if (!pde)
475 goto out_nf_conntrack;
476
477 root_uid = make_kuid(net->user_ns, 0);
478 root_gid = make_kgid(net->user_ns, 0);
479 if (uid_valid(root_uid) && gid_valid(root_gid))
480 proc_set_user(pde, root_uid, root_gid);
481
482 pde = proc_create_net("nf_conntrack", 0444, net->proc_net_stat,
483 &ct_cpu_seq_ops, sizeof(struct seq_net_private));
484 if (!pde)
485 goto out_stat_nf_conntrack;
486 return 0;
487
488 out_stat_nf_conntrack:
489 remove_proc_entry("nf_conntrack", net->proc_net);
490 out_nf_conntrack:
491 return -ENOMEM;
492 }
493
nf_conntrack_standalone_fini_proc(struct net * net)494 static void nf_conntrack_standalone_fini_proc(struct net *net)
495 {
496 remove_proc_entry("nf_conntrack", net->proc_net_stat);
497 remove_proc_entry("nf_conntrack", net->proc_net);
498 }
499 #else
nf_conntrack_standalone_init_proc(struct net * net)500 static int nf_conntrack_standalone_init_proc(struct net *net)
501 {
502 return 0;
503 }
504
nf_conntrack_standalone_fini_proc(struct net * net)505 static void nf_conntrack_standalone_fini_proc(struct net *net)
506 {
507 }
508 #endif /* CONFIG_NF_CONNTRACK_PROCFS */
509
510 /* Sysctl support */
511
512 #ifdef CONFIG_SYSCTL
513 /* Log invalid packets of a given protocol */
514 static int log_invalid_proto_min __read_mostly;
515 static int log_invalid_proto_max __read_mostly = 255;
516
517 /* size the user *wants to set */
518 static unsigned int nf_conntrack_htable_size_user __read_mostly;
519
520 static int
nf_conntrack_hash_sysctl(struct ctl_table * table,int write,void * buffer,size_t * lenp,loff_t * ppos)521 nf_conntrack_hash_sysctl(struct ctl_table *table, int write,
522 void *buffer, size_t *lenp, loff_t *ppos)
523 {
524 int ret;
525
526 ret = proc_dointvec(table, write, buffer, lenp, ppos);
527 if (ret < 0 || !write)
528 return ret;
529
530 /* update ret, we might not be able to satisfy request */
531 ret = nf_conntrack_hash_resize(nf_conntrack_htable_size_user);
532
533 /* update it to the actual value used by conntrack */
534 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
535 return ret;
536 }
537
538 static struct ctl_table_header *nf_ct_netfilter_header;
539
540 enum nf_ct_sysctl_index {
541 NF_SYSCTL_CT_MAX,
542 NF_SYSCTL_CT_COUNT,
543 NF_SYSCTL_CT_BUCKETS,
544 NF_SYSCTL_CT_CHECKSUM,
545 NF_SYSCTL_CT_LOG_INVALID,
546 NF_SYSCTL_CT_EXPECT_MAX,
547 NF_SYSCTL_CT_ACCT,
548 NF_SYSCTL_CT_HELPER,
549 #ifdef CONFIG_NF_CONNTRACK_EVENTS
550 NF_SYSCTL_CT_EVENTS,
551 #endif
552 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
553 NF_SYSCTL_CT_TIMESTAMP,
554 #endif
555 NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC,
556 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT,
557 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV,
558 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED,
559 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT,
560 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT,
561 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK,
562 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT,
563 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE,
564 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS,
565 NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK,
566 NF_SYSCTL_CT_PROTO_TCP_LOOSE,
567 NF_SYSCTL_CT_PROTO_TCP_LIBERAL,
568 NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS,
569 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP,
570 NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM,
571 NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP,
572 NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6,
573 #ifdef CONFIG_NF_CT_PROTO_SCTP
574 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED,
575 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT,
576 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED,
577 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED,
578 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT,
579 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD,
580 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT,
581 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT,
582 NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_ACKED,
583 #endif
584 #ifdef CONFIG_NF_CT_PROTO_DCCP
585 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST,
586 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND,
587 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN,
588 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN,
589 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ,
590 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING,
591 NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT,
592 NF_SYSCTL_CT_PROTO_DCCP_LOOSE,
593 #endif
594 #ifdef CONFIG_NF_CT_PROTO_GRE
595 NF_SYSCTL_CT_PROTO_TIMEOUT_GRE,
596 NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM,
597 #endif
598
599 __NF_SYSCTL_CT_LAST_SYSCTL,
600 };
601
602 #define NF_SYSCTL_CT_LAST_SYSCTL (__NF_SYSCTL_CT_LAST_SYSCTL + 1)
603
604 static struct ctl_table nf_ct_sysctl_table[] = {
605 [NF_SYSCTL_CT_MAX] = {
606 .procname = "nf_conntrack_max",
607 .data = &nf_conntrack_max,
608 .maxlen = sizeof(int),
609 .mode = 0644,
610 .proc_handler = proc_dointvec,
611 },
612 [NF_SYSCTL_CT_COUNT] = {
613 .procname = "nf_conntrack_count",
614 .data = &init_net.ct.count,
615 .maxlen = sizeof(int),
616 .mode = 0444,
617 .proc_handler = proc_dointvec,
618 },
619 [NF_SYSCTL_CT_BUCKETS] = {
620 .procname = "nf_conntrack_buckets",
621 .data = &nf_conntrack_htable_size_user,
622 .maxlen = sizeof(unsigned int),
623 .mode = 0644,
624 .proc_handler = nf_conntrack_hash_sysctl,
625 },
626 [NF_SYSCTL_CT_CHECKSUM] = {
627 .procname = "nf_conntrack_checksum",
628 .data = &init_net.ct.sysctl_checksum,
629 .maxlen = sizeof(int),
630 .mode = 0644,
631 .proc_handler = proc_dointvec_minmax,
632 .extra1 = SYSCTL_ZERO,
633 .extra2 = SYSCTL_ONE,
634 },
635 [NF_SYSCTL_CT_LOG_INVALID] = {
636 .procname = "nf_conntrack_log_invalid",
637 .data = &init_net.ct.sysctl_log_invalid,
638 .maxlen = sizeof(unsigned int),
639 .mode = 0644,
640 .proc_handler = proc_dointvec_minmax,
641 .extra1 = &log_invalid_proto_min,
642 .extra2 = &log_invalid_proto_max,
643 },
644 [NF_SYSCTL_CT_EXPECT_MAX] = {
645 .procname = "nf_conntrack_expect_max",
646 .data = &nf_ct_expect_max,
647 .maxlen = sizeof(int),
648 .mode = 0644,
649 .proc_handler = proc_dointvec,
650 },
651 [NF_SYSCTL_CT_ACCT] = {
652 .procname = "nf_conntrack_acct",
653 .data = &init_net.ct.sysctl_acct,
654 .maxlen = sizeof(int),
655 .mode = 0644,
656 .proc_handler = proc_dointvec_minmax,
657 .extra1 = SYSCTL_ZERO,
658 .extra2 = SYSCTL_ONE,
659 },
660 [NF_SYSCTL_CT_HELPER] = {
661 .procname = "nf_conntrack_helper",
662 .data = &init_net.ct.sysctl_auto_assign_helper,
663 .maxlen = sizeof(int),
664 .mode = 0644,
665 .proc_handler = proc_dointvec_minmax,
666 .extra1 = SYSCTL_ZERO,
667 .extra2 = SYSCTL_ONE,
668 },
669 #ifdef CONFIG_NF_CONNTRACK_EVENTS
670 [NF_SYSCTL_CT_EVENTS] = {
671 .procname = "nf_conntrack_events",
672 .data = &init_net.ct.sysctl_events,
673 .maxlen = sizeof(int),
674 .mode = 0644,
675 .proc_handler = proc_dointvec_minmax,
676 .extra1 = SYSCTL_ZERO,
677 .extra2 = SYSCTL_ONE,
678 },
679 #endif
680 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
681 [NF_SYSCTL_CT_TIMESTAMP] = {
682 .procname = "nf_conntrack_timestamp",
683 .data = &init_net.ct.sysctl_tstamp,
684 .maxlen = sizeof(int),
685 .mode = 0644,
686 .proc_handler = proc_dointvec_minmax,
687 .extra1 = SYSCTL_ZERO,
688 .extra2 = SYSCTL_ONE,
689 },
690 #endif
691 [NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC] = {
692 .procname = "nf_conntrack_generic_timeout",
693 .maxlen = sizeof(unsigned int),
694 .mode = 0644,
695 .proc_handler = proc_dointvec_jiffies,
696 },
697 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_SENT] = {
698 .procname = "nf_conntrack_tcp_timeout_syn_sent",
699 .maxlen = sizeof(unsigned int),
700 .mode = 0644,
701 .proc_handler = proc_dointvec_jiffies,
702 },
703 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_SYN_RECV] = {
704 .procname = "nf_conntrack_tcp_timeout_syn_recv",
705 .maxlen = sizeof(unsigned int),
706 .mode = 0644,
707 .proc_handler = proc_dointvec_jiffies,
708 },
709 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ESTABLISHED] = {
710 .procname = "nf_conntrack_tcp_timeout_established",
711 .maxlen = sizeof(unsigned int),
712 .mode = 0644,
713 .proc_handler = proc_dointvec_jiffies,
714 },
715 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_FIN_WAIT] = {
716 .procname = "nf_conntrack_tcp_timeout_fin_wait",
717 .maxlen = sizeof(unsigned int),
718 .mode = 0644,
719 .proc_handler = proc_dointvec_jiffies,
720 },
721 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE_WAIT] = {
722 .procname = "nf_conntrack_tcp_timeout_close_wait",
723 .maxlen = sizeof(unsigned int),
724 .mode = 0644,
725 .proc_handler = proc_dointvec_jiffies,
726 },
727 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_LAST_ACK] = {
728 .procname = "nf_conntrack_tcp_timeout_last_ack",
729 .maxlen = sizeof(unsigned int),
730 .mode = 0644,
731 .proc_handler = proc_dointvec_jiffies,
732 },
733 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_TIME_WAIT] = {
734 .procname = "nf_conntrack_tcp_timeout_time_wait",
735 .maxlen = sizeof(unsigned int),
736 .mode = 0644,
737 .proc_handler = proc_dointvec_jiffies,
738 },
739 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_CLOSE] = {
740 .procname = "nf_conntrack_tcp_timeout_close",
741 .maxlen = sizeof(unsigned int),
742 .mode = 0644,
743 .proc_handler = proc_dointvec_jiffies,
744 },
745 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_RETRANS] = {
746 .procname = "nf_conntrack_tcp_timeout_max_retrans",
747 .maxlen = sizeof(unsigned int),
748 .mode = 0644,
749 .proc_handler = proc_dointvec_jiffies,
750 },
751 [NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_UNACK] = {
752 .procname = "nf_conntrack_tcp_timeout_unacknowledged",
753 .maxlen = sizeof(unsigned int),
754 .mode = 0644,
755 .proc_handler = proc_dointvec_jiffies,
756 },
757 [NF_SYSCTL_CT_PROTO_TCP_LOOSE] = {
758 .procname = "nf_conntrack_tcp_loose",
759 .maxlen = sizeof(int),
760 .mode = 0644,
761 .proc_handler = proc_dointvec_minmax,
762 .extra1 = SYSCTL_ZERO,
763 .extra2 = SYSCTL_ONE,
764 },
765 [NF_SYSCTL_CT_PROTO_TCP_LIBERAL] = {
766 .procname = "nf_conntrack_tcp_be_liberal",
767 .maxlen = sizeof(int),
768 .mode = 0644,
769 .proc_handler = proc_dointvec_minmax,
770 .extra1 = SYSCTL_ZERO,
771 .extra2 = SYSCTL_ONE,
772 },
773 [NF_SYSCTL_CT_PROTO_TCP_MAX_RETRANS] = {
774 .procname = "nf_conntrack_tcp_max_retrans",
775 .maxlen = sizeof(unsigned int),
776 .mode = 0644,
777 .proc_handler = proc_dointvec,
778 },
779 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP] = {
780 .procname = "nf_conntrack_udp_timeout",
781 .maxlen = sizeof(unsigned int),
782 .mode = 0644,
783 .proc_handler = proc_dointvec_jiffies,
784 },
785 [NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM] = {
786 .procname = "nf_conntrack_udp_timeout_stream",
787 .maxlen = sizeof(unsigned int),
788 .mode = 0644,
789 .proc_handler = proc_dointvec_jiffies,
790 },
791 [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP] = {
792 .procname = "nf_conntrack_icmp_timeout",
793 .maxlen = sizeof(unsigned int),
794 .mode = 0644,
795 .proc_handler = proc_dointvec_jiffies,
796 },
797 [NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6] = {
798 .procname = "nf_conntrack_icmpv6_timeout",
799 .maxlen = sizeof(unsigned int),
800 .mode = 0644,
801 .proc_handler = proc_dointvec_jiffies,
802 },
803 #ifdef CONFIG_NF_CT_PROTO_SCTP
804 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_CLOSED] = {
805 .procname = "nf_conntrack_sctp_timeout_closed",
806 .maxlen = sizeof(unsigned int),
807 .mode = 0644,
808 .proc_handler = proc_dointvec_jiffies,
809 },
810 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_WAIT] = {
811 .procname = "nf_conntrack_sctp_timeout_cookie_wait",
812 .maxlen = sizeof(unsigned int),
813 .mode = 0644,
814 .proc_handler = proc_dointvec_jiffies,
815 },
816 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_COOKIE_ECHOED] = {
817 .procname = "nf_conntrack_sctp_timeout_cookie_echoed",
818 .maxlen = sizeof(unsigned int),
819 .mode = 0644,
820 .proc_handler = proc_dointvec_jiffies,
821 },
822 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ESTABLISHED] = {
823 .procname = "nf_conntrack_sctp_timeout_established",
824 .maxlen = sizeof(unsigned int),
825 .mode = 0644,
826 .proc_handler = proc_dointvec_jiffies,
827 },
828 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_SENT] = {
829 .procname = "nf_conntrack_sctp_timeout_shutdown_sent",
830 .maxlen = sizeof(unsigned int),
831 .mode = 0644,
832 .proc_handler = proc_dointvec_jiffies,
833 },
834 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_RECD] = {
835 .procname = "nf_conntrack_sctp_timeout_shutdown_recd",
836 .maxlen = sizeof(unsigned int),
837 .mode = 0644,
838 .proc_handler = proc_dointvec_jiffies,
839 },
840 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_SHUTDOWN_ACK_SENT] = {
841 .procname = "nf_conntrack_sctp_timeout_shutdown_ack_sent",
842 .maxlen = sizeof(unsigned int),
843 .mode = 0644,
844 .proc_handler = proc_dointvec_jiffies,
845 },
846 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_SENT] = {
847 .procname = "nf_conntrack_sctp_timeout_heartbeat_sent",
848 .maxlen = sizeof(unsigned int),
849 .mode = 0644,
850 .proc_handler = proc_dointvec_jiffies,
851 },
852 [NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_HEARTBEAT_ACKED] = {
853 .procname = "nf_conntrack_sctp_timeout_heartbeat_acked",
854 .maxlen = sizeof(unsigned int),
855 .mode = 0644,
856 .proc_handler = proc_dointvec_jiffies,
857 },
858 #endif
859 #ifdef CONFIG_NF_CT_PROTO_DCCP
860 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_REQUEST] = {
861 .procname = "nf_conntrack_dccp_timeout_request",
862 .maxlen = sizeof(unsigned int),
863 .mode = 0644,
864 .proc_handler = proc_dointvec_jiffies,
865 },
866 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_RESPOND] = {
867 .procname = "nf_conntrack_dccp_timeout_respond",
868 .maxlen = sizeof(unsigned int),
869 .mode = 0644,
870 .proc_handler = proc_dointvec_jiffies,
871 },
872 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_PARTOPEN] = {
873 .procname = "nf_conntrack_dccp_timeout_partopen",
874 .maxlen = sizeof(unsigned int),
875 .mode = 0644,
876 .proc_handler = proc_dointvec_jiffies,
877 },
878 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_OPEN] = {
879 .procname = "nf_conntrack_dccp_timeout_open",
880 .maxlen = sizeof(unsigned int),
881 .mode = 0644,
882 .proc_handler = proc_dointvec_jiffies,
883 },
884 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSEREQ] = {
885 .procname = "nf_conntrack_dccp_timeout_closereq",
886 .maxlen = sizeof(unsigned int),
887 .mode = 0644,
888 .proc_handler = proc_dointvec_jiffies,
889 },
890 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_CLOSING] = {
891 .procname = "nf_conntrack_dccp_timeout_closing",
892 .maxlen = sizeof(unsigned int),
893 .mode = 0644,
894 .proc_handler = proc_dointvec_jiffies,
895 },
896 [NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_TIMEWAIT] = {
897 .procname = "nf_conntrack_dccp_timeout_timewait",
898 .maxlen = sizeof(unsigned int),
899 .mode = 0644,
900 .proc_handler = proc_dointvec_jiffies,
901 },
902 [NF_SYSCTL_CT_PROTO_DCCP_LOOSE] = {
903 .procname = "nf_conntrack_dccp_loose",
904 .maxlen = sizeof(int),
905 .mode = 0644,
906 .proc_handler = proc_dointvec_minmax,
907 .extra1 = SYSCTL_ZERO,
908 .extra2 = SYSCTL_ONE,
909 },
910 #endif
911 #ifdef CONFIG_NF_CT_PROTO_GRE
912 [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE] = {
913 .procname = "nf_conntrack_gre_timeout",
914 .maxlen = sizeof(unsigned int),
915 .mode = 0644,
916 .proc_handler = proc_dointvec_jiffies,
917 },
918 [NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM] = {
919 .procname = "nf_conntrack_gre_timeout_stream",
920 .maxlen = sizeof(unsigned int),
921 .mode = 0644,
922 .proc_handler = proc_dointvec_jiffies,
923 },
924 #endif
925 {}
926 };
927
928 static struct ctl_table nf_ct_netfilter_table[] = {
929 {
930 .procname = "nf_conntrack_max",
931 .data = &nf_conntrack_max,
932 .maxlen = sizeof(int),
933 .mode = 0644,
934 .proc_handler = proc_dointvec,
935 },
936 { }
937 };
938
nf_conntrack_standalone_init_tcp_sysctl(struct net * net,struct ctl_table * table)939 static void nf_conntrack_standalone_init_tcp_sysctl(struct net *net,
940 struct ctl_table *table)
941 {
942 struct nf_tcp_net *tn = nf_tcp_pernet(net);
943
944 #define XASSIGN(XNAME, tn) \
945 table[NF_SYSCTL_CT_PROTO_TIMEOUT_TCP_ ## XNAME].data = \
946 &(tn)->timeouts[TCP_CONNTRACK_ ## XNAME]
947
948 XASSIGN(SYN_SENT, tn);
949 XASSIGN(SYN_RECV, tn);
950 XASSIGN(ESTABLISHED, tn);
951 XASSIGN(FIN_WAIT, tn);
952 XASSIGN(CLOSE_WAIT, tn);
953 XASSIGN(LAST_ACK, tn);
954 XASSIGN(TIME_WAIT, tn);
955 XASSIGN(CLOSE, tn);
956 XASSIGN(RETRANS, tn);
957 XASSIGN(UNACK, tn);
958 #undef XASSIGN
959 #define XASSIGN(XNAME, rval) \
960 table[NF_SYSCTL_CT_PROTO_TCP_ ## XNAME].data = (rval)
961
962 XASSIGN(LOOSE, &tn->tcp_loose);
963 XASSIGN(LIBERAL, &tn->tcp_be_liberal);
964 XASSIGN(MAX_RETRANS, &tn->tcp_max_retrans);
965 #undef XASSIGN
966 }
967
nf_conntrack_standalone_init_sctp_sysctl(struct net * net,struct ctl_table * table)968 static void nf_conntrack_standalone_init_sctp_sysctl(struct net *net,
969 struct ctl_table *table)
970 {
971 #ifdef CONFIG_NF_CT_PROTO_SCTP
972 struct nf_sctp_net *sn = nf_sctp_pernet(net);
973
974 #define XASSIGN(XNAME, sn) \
975 table[NF_SYSCTL_CT_PROTO_TIMEOUT_SCTP_ ## XNAME].data = \
976 &(sn)->timeouts[SCTP_CONNTRACK_ ## XNAME]
977
978 XASSIGN(CLOSED, sn);
979 XASSIGN(COOKIE_WAIT, sn);
980 XASSIGN(COOKIE_ECHOED, sn);
981 XASSIGN(ESTABLISHED, sn);
982 XASSIGN(SHUTDOWN_SENT, sn);
983 XASSIGN(SHUTDOWN_RECD, sn);
984 XASSIGN(SHUTDOWN_ACK_SENT, sn);
985 XASSIGN(HEARTBEAT_SENT, sn);
986 XASSIGN(HEARTBEAT_ACKED, sn);
987 #undef XASSIGN
988 #endif
989 }
990
nf_conntrack_standalone_init_dccp_sysctl(struct net * net,struct ctl_table * table)991 static void nf_conntrack_standalone_init_dccp_sysctl(struct net *net,
992 struct ctl_table *table)
993 {
994 #ifdef CONFIG_NF_CT_PROTO_DCCP
995 struct nf_dccp_net *dn = nf_dccp_pernet(net);
996
997 #define XASSIGN(XNAME, dn) \
998 table[NF_SYSCTL_CT_PROTO_TIMEOUT_DCCP_ ## XNAME].data = \
999 &(dn)->dccp_timeout[CT_DCCP_ ## XNAME]
1000
1001 XASSIGN(REQUEST, dn);
1002 XASSIGN(RESPOND, dn);
1003 XASSIGN(PARTOPEN, dn);
1004 XASSIGN(OPEN, dn);
1005 XASSIGN(CLOSEREQ, dn);
1006 XASSIGN(CLOSING, dn);
1007 XASSIGN(TIMEWAIT, dn);
1008 #undef XASSIGN
1009
1010 table[NF_SYSCTL_CT_PROTO_DCCP_LOOSE].data = &dn->dccp_loose;
1011 #endif
1012 }
1013
nf_conntrack_standalone_init_gre_sysctl(struct net * net,struct ctl_table * table)1014 static void nf_conntrack_standalone_init_gre_sysctl(struct net *net,
1015 struct ctl_table *table)
1016 {
1017 #ifdef CONFIG_NF_CT_PROTO_GRE
1018 struct nf_gre_net *gn = nf_gre_pernet(net);
1019
1020 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE].data = &gn->timeouts[GRE_CT_UNREPLIED];
1021 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GRE_STREAM].data = &gn->timeouts[GRE_CT_REPLIED];
1022 #endif
1023 }
1024
nf_conntrack_standalone_init_sysctl(struct net * net)1025 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1026 {
1027 struct nf_udp_net *un = nf_udp_pernet(net);
1028 struct ctl_table *table;
1029
1030 BUILD_BUG_ON(ARRAY_SIZE(nf_ct_sysctl_table) != NF_SYSCTL_CT_LAST_SYSCTL);
1031
1032 table = kmemdup(nf_ct_sysctl_table, sizeof(nf_ct_sysctl_table),
1033 GFP_KERNEL);
1034 if (!table)
1035 return -ENOMEM;
1036
1037 table[NF_SYSCTL_CT_COUNT].data = &net->ct.count;
1038 table[NF_SYSCTL_CT_CHECKSUM].data = &net->ct.sysctl_checksum;
1039 table[NF_SYSCTL_CT_LOG_INVALID].data = &net->ct.sysctl_log_invalid;
1040 table[NF_SYSCTL_CT_ACCT].data = &net->ct.sysctl_acct;
1041 table[NF_SYSCTL_CT_HELPER].data = &net->ct.sysctl_auto_assign_helper;
1042 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1043 table[NF_SYSCTL_CT_EVENTS].data = &net->ct.sysctl_events;
1044 #endif
1045 #ifdef CONFIG_NF_CONNTRACK_TIMESTAMP
1046 table[NF_SYSCTL_CT_TIMESTAMP].data = &net->ct.sysctl_tstamp;
1047 #endif
1048 table[NF_SYSCTL_CT_PROTO_TIMEOUT_GENERIC].data = &nf_generic_pernet(net)->timeout;
1049 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMP].data = &nf_icmp_pernet(net)->timeout;
1050 table[NF_SYSCTL_CT_PROTO_TIMEOUT_ICMPV6].data = &nf_icmpv6_pernet(net)->timeout;
1051 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP].data = &un->timeouts[UDP_CT_UNREPLIED];
1052 table[NF_SYSCTL_CT_PROTO_TIMEOUT_UDP_STREAM].data = &un->timeouts[UDP_CT_REPLIED];
1053
1054 nf_conntrack_standalone_init_tcp_sysctl(net, table);
1055 nf_conntrack_standalone_init_sctp_sysctl(net, table);
1056 nf_conntrack_standalone_init_dccp_sysctl(net, table);
1057 nf_conntrack_standalone_init_gre_sysctl(net, table);
1058
1059 /* Don't allow unprivileged users to alter certain sysctls */
1060 if (net->user_ns != &init_user_ns) {
1061 table[NF_SYSCTL_CT_MAX].mode = 0444;
1062 table[NF_SYSCTL_CT_EXPECT_MAX].mode = 0444;
1063 table[NF_SYSCTL_CT_HELPER].mode = 0444;
1064 #ifdef CONFIG_NF_CONNTRACK_EVENTS
1065 table[NF_SYSCTL_CT_EVENTS].mode = 0444;
1066 #endif
1067 table[NF_SYSCTL_CT_BUCKETS].mode = 0444;
1068 } else if (!net_eq(&init_net, net)) {
1069 table[NF_SYSCTL_CT_BUCKETS].mode = 0444;
1070 }
1071
1072 net->ct.sysctl_header = register_net_sysctl(net, "net/netfilter", table);
1073 if (!net->ct.sysctl_header)
1074 goto out_unregister_netfilter;
1075
1076 return 0;
1077
1078 out_unregister_netfilter:
1079 kfree(table);
1080 return -ENOMEM;
1081 }
1082
nf_conntrack_standalone_fini_sysctl(struct net * net)1083 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1084 {
1085 struct ctl_table *table;
1086
1087 table = net->ct.sysctl_header->ctl_table_arg;
1088 unregister_net_sysctl_table(net->ct.sysctl_header);
1089 kfree(table);
1090 }
1091 #else
nf_conntrack_standalone_init_sysctl(struct net * net)1092 static int nf_conntrack_standalone_init_sysctl(struct net *net)
1093 {
1094 return 0;
1095 }
1096
nf_conntrack_standalone_fini_sysctl(struct net * net)1097 static void nf_conntrack_standalone_fini_sysctl(struct net *net)
1098 {
1099 }
1100 #endif /* CONFIG_SYSCTL */
1101
nf_conntrack_fini_net(struct net * net)1102 static void nf_conntrack_fini_net(struct net *net)
1103 {
1104 if (enable_hooks)
1105 nf_ct_netns_put(net, NFPROTO_INET);
1106
1107 nf_conntrack_standalone_fini_proc(net);
1108 nf_conntrack_standalone_fini_sysctl(net);
1109 }
1110
nf_conntrack_pernet_init(struct net * net)1111 static int nf_conntrack_pernet_init(struct net *net)
1112 {
1113 int ret;
1114
1115 net->ct.sysctl_checksum = 1;
1116
1117 ret = nf_conntrack_standalone_init_sysctl(net);
1118 if (ret < 0)
1119 return ret;
1120
1121 ret = nf_conntrack_standalone_init_proc(net);
1122 if (ret < 0)
1123 goto out_proc;
1124
1125 ret = nf_conntrack_init_net(net);
1126 if (ret < 0)
1127 goto out_init_net;
1128
1129 if (enable_hooks) {
1130 ret = nf_ct_netns_get(net, NFPROTO_INET);
1131 if (ret < 0)
1132 goto out_hooks;
1133 }
1134
1135 return 0;
1136
1137 out_hooks:
1138 nf_conntrack_cleanup_net(net);
1139 out_init_net:
1140 nf_conntrack_standalone_fini_proc(net);
1141 out_proc:
1142 nf_conntrack_standalone_fini_sysctl(net);
1143 return ret;
1144 }
1145
nf_conntrack_pernet_exit(struct list_head * net_exit_list)1146 static void nf_conntrack_pernet_exit(struct list_head *net_exit_list)
1147 {
1148 struct net *net;
1149
1150 list_for_each_entry(net, net_exit_list, exit_list)
1151 nf_conntrack_fini_net(net);
1152
1153 nf_conntrack_cleanup_net_list(net_exit_list);
1154 }
1155
1156 static struct pernet_operations nf_conntrack_net_ops = {
1157 .init = nf_conntrack_pernet_init,
1158 .exit_batch = nf_conntrack_pernet_exit,
1159 .id = &nf_conntrack_net_id,
1160 .size = sizeof(struct nf_conntrack_net),
1161 };
1162
nf_conntrack_standalone_init(void)1163 static int __init nf_conntrack_standalone_init(void)
1164 {
1165 int ret = nf_conntrack_init_start();
1166 if (ret < 0)
1167 goto out_start;
1168
1169 BUILD_BUG_ON(NFCT_INFOMASK <= IP_CT_NUMBER);
1170
1171 #ifdef CONFIG_SYSCTL
1172 nf_ct_netfilter_header =
1173 register_net_sysctl(&init_net, "net", nf_ct_netfilter_table);
1174 if (!nf_ct_netfilter_header) {
1175 pr_err("nf_conntrack: can't register to sysctl.\n");
1176 ret = -ENOMEM;
1177 goto out_sysctl;
1178 }
1179
1180 nf_conntrack_htable_size_user = nf_conntrack_htable_size;
1181 #endif
1182
1183 ret = register_pernet_subsys(&nf_conntrack_net_ops);
1184 if (ret < 0)
1185 goto out_pernet;
1186
1187 nf_conntrack_init_end();
1188 return 0;
1189
1190 out_pernet:
1191 #ifdef CONFIG_SYSCTL
1192 unregister_net_sysctl_table(nf_ct_netfilter_header);
1193 out_sysctl:
1194 #endif
1195 nf_conntrack_cleanup_end();
1196 out_start:
1197 return ret;
1198 }
1199
nf_conntrack_standalone_fini(void)1200 static void __exit nf_conntrack_standalone_fini(void)
1201 {
1202 nf_conntrack_cleanup_start();
1203 unregister_pernet_subsys(&nf_conntrack_net_ops);
1204 #ifdef CONFIG_SYSCTL
1205 unregister_net_sysctl_table(nf_ct_netfilter_header);
1206 #endif
1207 nf_conntrack_cleanup_end();
1208 }
1209
1210 module_init(nf_conntrack_standalone_init);
1211 module_exit(nf_conntrack_standalone_fini);
1212
