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Merge tag 'irq-core-2020-12-23' of git://git.kernel.org/pub/scm/linux/kernel/git...
[mirror_ubuntu-hirsute-kernel.git] / net / netfilter / nft_ct.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (c) 2008-2009 Patrick McHardy <kaber@trash.net>
4 * Copyright (c) 2016 Pablo Neira Ayuso <pablo@netfilter.org>
5 *
6 * Development of this code funded by Astaro AG (http://www.astaro.com/)
7 */
8
9 #include <linux/kernel.h>
10 #include <linux/init.h>
11 #include <linux/module.h>
12 #include <linux/netlink.h>
13 #include <linux/netfilter.h>
14 #include <linux/netfilter/nf_tables.h>
15 #include <net/netfilter/nf_tables.h>
16 #include <net/netfilter/nf_conntrack.h>
17 #include <net/netfilter/nf_conntrack_acct.h>
18 #include <net/netfilter/nf_conntrack_tuple.h>
19 #include <net/netfilter/nf_conntrack_helper.h>
20 #include <net/netfilter/nf_conntrack_ecache.h>
21 #include <net/netfilter/nf_conntrack_labels.h>
22 #include <net/netfilter/nf_conntrack_timeout.h>
23 #include <net/netfilter/nf_conntrack_l4proto.h>
24 #include <net/netfilter/nf_conntrack_expect.h>
25
26 struct nft_ct {
27 enum nft_ct_keys key:8;
28 enum ip_conntrack_dir dir:8;
29 union {
30 enum nft_registers dreg:8;
31 enum nft_registers sreg:8;
32 };
33 };
34
35 struct nft_ct_helper_obj {
36 struct nf_conntrack_helper *helper4;
37 struct nf_conntrack_helper *helper6;
38 u8 l4proto;
39 };
40
41 #ifdef CONFIG_NF_CONNTRACK_ZONES
42 static DEFINE_PER_CPU(struct nf_conn *, nft_ct_pcpu_template);
43 static unsigned int nft_ct_pcpu_template_refcnt __read_mostly;
44 #endif
45
46 static u64 nft_ct_get_eval_counter(const struct nf_conn_counter *c,
47 enum nft_ct_keys k,
48 enum ip_conntrack_dir d)
49 {
50 if (d < IP_CT_DIR_MAX)
51 return k == NFT_CT_BYTES ? atomic64_read(&c[d].bytes) :
52 atomic64_read(&c[d].packets);
53
54 return nft_ct_get_eval_counter(c, k, IP_CT_DIR_ORIGINAL) +
55 nft_ct_get_eval_counter(c, k, IP_CT_DIR_REPLY);
56 }
57
58 static void nft_ct_get_eval(const struct nft_expr *expr,
59 struct nft_regs *regs,
60 const struct nft_pktinfo *pkt)
61 {
62 const struct nft_ct *priv = nft_expr_priv(expr);
63 u32 *dest = &regs->data[priv->dreg];
64 enum ip_conntrack_info ctinfo;
65 const struct nf_conn *ct;
66 const struct nf_conn_help *help;
67 const struct nf_conntrack_tuple *tuple;
68 const struct nf_conntrack_helper *helper;
69 unsigned int state;
70
71 ct = nf_ct_get(pkt->skb, &ctinfo);
72
73 switch (priv->key) {
74 case NFT_CT_STATE:
75 if (ct)
76 state = NF_CT_STATE_BIT(ctinfo);
77 else if (ctinfo == IP_CT_UNTRACKED)
78 state = NF_CT_STATE_UNTRACKED_BIT;
79 else
80 state = NF_CT_STATE_INVALID_BIT;
81 *dest = state;
82 return;
83 default:
84 break;
85 }
86
87 if (ct == NULL)
88 goto err;
89
90 switch (priv->key) {
91 case NFT_CT_DIRECTION:
92 nft_reg_store8(dest, CTINFO2DIR(ctinfo));
93 return;
94 case NFT_CT_STATUS:
95 *dest = ct->status;
96 return;
97 #ifdef CONFIG_NF_CONNTRACK_MARK
98 case NFT_CT_MARK:
99 *dest = ct->mark;
100 return;
101 #endif
102 #ifdef CONFIG_NF_CONNTRACK_SECMARK
103 case NFT_CT_SECMARK:
104 *dest = ct->secmark;
105 return;
106 #endif
107 case NFT_CT_EXPIRATION:
108 *dest = jiffies_to_msecs(nf_ct_expires(ct));
109 return;
110 case NFT_CT_HELPER:
111 if (ct->master == NULL)
112 goto err;
113 help = nfct_help(ct->master);
114 if (help == NULL)
115 goto err;
116 helper = rcu_dereference(help->helper);
117 if (helper == NULL)
118 goto err;
119 strncpy((char *)dest, helper->name, NF_CT_HELPER_NAME_LEN);
120 return;
121 #ifdef CONFIG_NF_CONNTRACK_LABELS
122 case NFT_CT_LABELS: {
123 struct nf_conn_labels *labels = nf_ct_labels_find(ct);
124
125 if (labels)
126 memcpy(dest, labels->bits, NF_CT_LABELS_MAX_SIZE);
127 else
128 memset(dest, 0, NF_CT_LABELS_MAX_SIZE);
129 return;
130 }
131 #endif
132 case NFT_CT_BYTES:
133 case NFT_CT_PKTS: {
134 const struct nf_conn_acct *acct = nf_conn_acct_find(ct);
135 u64 count = 0;
136
137 if (acct)
138 count = nft_ct_get_eval_counter(acct->counter,
139 priv->key, priv->dir);
140 memcpy(dest, &count, sizeof(count));
141 return;
142 }
143 case NFT_CT_AVGPKT: {
144 const struct nf_conn_acct *acct = nf_conn_acct_find(ct);
145 u64 avgcnt = 0, bcnt = 0, pcnt = 0;
146
147 if (acct) {
148 pcnt = nft_ct_get_eval_counter(acct->counter,
149 NFT_CT_PKTS, priv->dir);
150 bcnt = nft_ct_get_eval_counter(acct->counter,
151 NFT_CT_BYTES, priv->dir);
152 if (pcnt != 0)
153 avgcnt = div64_u64(bcnt, pcnt);
154 }
155
156 memcpy(dest, &avgcnt, sizeof(avgcnt));
157 return;
158 }
159 case NFT_CT_L3PROTOCOL:
160 nft_reg_store8(dest, nf_ct_l3num(ct));
161 return;
162 case NFT_CT_PROTOCOL:
163 nft_reg_store8(dest, nf_ct_protonum(ct));
164 return;
165 #ifdef CONFIG_NF_CONNTRACK_ZONES
166 case NFT_CT_ZONE: {
167 const struct nf_conntrack_zone *zone = nf_ct_zone(ct);
168 u16 zoneid;
169
170 if (priv->dir < IP_CT_DIR_MAX)
171 zoneid = nf_ct_zone_id(zone, priv->dir);
172 else
173 zoneid = zone->id;
174
175 nft_reg_store16(dest, zoneid);
176 return;
177 }
178 #endif
179 case NFT_CT_ID:
180 *dest = nf_ct_get_id(ct);
181 return;
182 default:
183 break;
184 }
185
186 tuple = &ct->tuplehash[priv->dir].tuple;
187 switch (priv->key) {
188 case NFT_CT_SRC:
189 memcpy(dest, tuple->src.u3.all,
190 nf_ct_l3num(ct) == NFPROTO_IPV4 ? 4 : 16);
191 return;
192 case NFT_CT_DST:
193 memcpy(dest, tuple->dst.u3.all,
194 nf_ct_l3num(ct) == NFPROTO_IPV4 ? 4 : 16);
195 return;
196 case NFT_CT_PROTO_SRC:
197 nft_reg_store16(dest, (__force u16)tuple->src.u.all);
198 return;
199 case NFT_CT_PROTO_DST:
200 nft_reg_store16(dest, (__force u16)tuple->dst.u.all);
201 return;
202 case NFT_CT_SRC_IP:
203 if (nf_ct_l3num(ct) != NFPROTO_IPV4)
204 goto err;
205 *dest = tuple->src.u3.ip;
206 return;
207 case NFT_CT_DST_IP:
208 if (nf_ct_l3num(ct) != NFPROTO_IPV4)
209 goto err;
210 *dest = tuple->dst.u3.ip;
211 return;
212 case NFT_CT_SRC_IP6:
213 if (nf_ct_l3num(ct) != NFPROTO_IPV6)
214 goto err;
215 memcpy(dest, tuple->src.u3.ip6, sizeof(struct in6_addr));
216 return;
217 case NFT_CT_DST_IP6:
218 if (nf_ct_l3num(ct) != NFPROTO_IPV6)
219 goto err;
220 memcpy(dest, tuple->dst.u3.ip6, sizeof(struct in6_addr));
221 return;
222 default:
223 break;
224 }
225 return;
226 err:
227 regs->verdict.code = NFT_BREAK;
228 }
229
230 #ifdef CONFIG_NF_CONNTRACK_ZONES
231 static void nft_ct_set_zone_eval(const struct nft_expr *expr,
232 struct nft_regs *regs,
233 const struct nft_pktinfo *pkt)
234 {
235 struct nf_conntrack_zone zone = { .dir = NF_CT_DEFAULT_ZONE_DIR };
236 const struct nft_ct *priv = nft_expr_priv(expr);
237 struct sk_buff *skb = pkt->skb;
238 enum ip_conntrack_info ctinfo;
239 u16 value = nft_reg_load16(&regs->data[priv->sreg]);
240 struct nf_conn *ct;
241
242 ct = nf_ct_get(skb, &ctinfo);
243 if (ct) /* already tracked */
244 return;
245
246 zone.id = value;
247
248 switch (priv->dir) {
249 case IP_CT_DIR_ORIGINAL:
250 zone.dir = NF_CT_ZONE_DIR_ORIG;
251 break;
252 case IP_CT_DIR_REPLY:
253 zone.dir = NF_CT_ZONE_DIR_REPL;
254 break;
255 default:
256 break;
257 }
258
259 ct = this_cpu_read(nft_ct_pcpu_template);
260
261 if (likely(atomic_read(&ct->ct_general.use) == 1)) {
262 nf_ct_zone_add(ct, &zone);
263 } else {
264 /* previous skb got queued to userspace */
265 ct = nf_ct_tmpl_alloc(nft_net(pkt), &zone, GFP_ATOMIC);
266 if (!ct) {
267 regs->verdict.code = NF_DROP;
268 return;
269 }
270 }
271
272 atomic_inc(&ct->ct_general.use);
273 nf_ct_set(skb, ct, IP_CT_NEW);
274 }
275 #endif
276
277 static void nft_ct_set_eval(const struct nft_expr *expr,
278 struct nft_regs *regs,
279 const struct nft_pktinfo *pkt)
280 {
281 const struct nft_ct *priv = nft_expr_priv(expr);
282 struct sk_buff *skb = pkt->skb;
283 #if defined(CONFIG_NF_CONNTRACK_MARK) || defined(CONFIG_NF_CONNTRACK_SECMARK)
284 u32 value = regs->data[priv->sreg];
285 #endif
286 enum ip_conntrack_info ctinfo;
287 struct nf_conn *ct;
288
289 ct = nf_ct_get(skb, &ctinfo);
290 if (ct == NULL || nf_ct_is_template(ct))
291 return;
292
293 switch (priv->key) {
294 #ifdef CONFIG_NF_CONNTRACK_MARK
295 case NFT_CT_MARK:
296 if (ct->mark != value) {
297 ct->mark = value;
298 nf_conntrack_event_cache(IPCT_MARK, ct);
299 }
300 break;
301 #endif
302 #ifdef CONFIG_NF_CONNTRACK_SECMARK
303 case NFT_CT_SECMARK:
304 if (ct->secmark != value) {
305 ct->secmark = value;
306 nf_conntrack_event_cache(IPCT_SECMARK, ct);
307 }
308 break;
309 #endif
310 #ifdef CONFIG_NF_CONNTRACK_LABELS
311 case NFT_CT_LABELS:
312 nf_connlabels_replace(ct,
313 &regs->data[priv->sreg],
314 &regs->data[priv->sreg],
315 NF_CT_LABELS_MAX_SIZE / sizeof(u32));
316 break;
317 #endif
318 #ifdef CONFIG_NF_CONNTRACK_EVENTS
319 case NFT_CT_EVENTMASK: {
320 struct nf_conntrack_ecache *e = nf_ct_ecache_find(ct);
321 u32 ctmask = regs->data[priv->sreg];
322
323 if (e) {
324 if (e->ctmask != ctmask)
325 e->ctmask = ctmask;
326 break;
327 }
328
329 if (ctmask && !nf_ct_is_confirmed(ct))
330 nf_ct_ecache_ext_add(ct, ctmask, 0, GFP_ATOMIC);
331 break;
332 }
333 #endif
334 default:
335 break;
336 }
337 }
338
339 static const struct nla_policy nft_ct_policy[NFTA_CT_MAX + 1] = {
340 [NFTA_CT_DREG] = { .type = NLA_U32 },
341 [NFTA_CT_KEY] = { .type = NLA_U32 },
342 [NFTA_CT_DIRECTION] = { .type = NLA_U8 },
343 [NFTA_CT_SREG] = { .type = NLA_U32 },
344 };
345
346 #ifdef CONFIG_NF_CONNTRACK_ZONES
347 static void nft_ct_tmpl_put_pcpu(void)
348 {
349 struct nf_conn *ct;
350 int cpu;
351
352 for_each_possible_cpu(cpu) {
353 ct = per_cpu(nft_ct_pcpu_template, cpu);
354 if (!ct)
355 break;
356 nf_ct_put(ct);
357 per_cpu(nft_ct_pcpu_template, cpu) = NULL;
358 }
359 }
360
361 static bool nft_ct_tmpl_alloc_pcpu(void)
362 {
363 struct nf_conntrack_zone zone = { .id = 0 };
364 struct nf_conn *tmp;
365 int cpu;
366
367 if (nft_ct_pcpu_template_refcnt)
368 return true;
369
370 for_each_possible_cpu(cpu) {
371 tmp = nf_ct_tmpl_alloc(&init_net, &zone, GFP_KERNEL);
372 if (!tmp) {
373 nft_ct_tmpl_put_pcpu();
374 return false;
375 }
376
377 atomic_set(&tmp->ct_general.use, 1);
378 per_cpu(nft_ct_pcpu_template, cpu) = tmp;
379 }
380
381 return true;
382 }
383 #endif
384
385 static int nft_ct_get_init(const struct nft_ctx *ctx,
386 const struct nft_expr *expr,
387 const struct nlattr * const tb[])
388 {
389 struct nft_ct *priv = nft_expr_priv(expr);
390 unsigned int len;
391 int err;
392
393 priv->key = ntohl(nla_get_be32(tb[NFTA_CT_KEY]));
394 priv->dir = IP_CT_DIR_MAX;
395 switch (priv->key) {
396 case NFT_CT_DIRECTION:
397 if (tb[NFTA_CT_DIRECTION] != NULL)
398 return -EINVAL;
399 len = sizeof(u8);
400 break;
401 case NFT_CT_STATE:
402 case NFT_CT_STATUS:
403 #ifdef CONFIG_NF_CONNTRACK_MARK
404 case NFT_CT_MARK:
405 #endif
406 #ifdef CONFIG_NF_CONNTRACK_SECMARK
407 case NFT_CT_SECMARK:
408 #endif
409 case NFT_CT_EXPIRATION:
410 if (tb[NFTA_CT_DIRECTION] != NULL)
411 return -EINVAL;
412 len = sizeof(u32);
413 break;
414 #ifdef CONFIG_NF_CONNTRACK_LABELS
415 case NFT_CT_LABELS:
416 if (tb[NFTA_CT_DIRECTION] != NULL)
417 return -EINVAL;
418 len = NF_CT_LABELS_MAX_SIZE;
419 break;
420 #endif
421 case NFT_CT_HELPER:
422 if (tb[NFTA_CT_DIRECTION] != NULL)
423 return -EINVAL;
424 len = NF_CT_HELPER_NAME_LEN;
425 break;
426
427 case NFT_CT_L3PROTOCOL:
428 case NFT_CT_PROTOCOL:
429 /* For compatibility, do not report error if NFTA_CT_DIRECTION
430 * attribute is specified.
431 */
432 len = sizeof(u8);
433 break;
434 case NFT_CT_SRC:
435 case NFT_CT_DST:
436 if (tb[NFTA_CT_DIRECTION] == NULL)
437 return -EINVAL;
438
439 switch (ctx->family) {
440 case NFPROTO_IPV4:
441 len = sizeof_field(struct nf_conntrack_tuple,
442 src.u3.ip);
443 break;
444 case NFPROTO_IPV6:
445 case NFPROTO_INET:
446 len = sizeof_field(struct nf_conntrack_tuple,
447 src.u3.ip6);
448 break;
449 default:
450 return -EAFNOSUPPORT;
451 }
452 break;
453 case NFT_CT_SRC_IP:
454 case NFT_CT_DST_IP:
455 if (tb[NFTA_CT_DIRECTION] == NULL)
456 return -EINVAL;
457
458 len = sizeof_field(struct nf_conntrack_tuple, src.u3.ip);
459 break;
460 case NFT_CT_SRC_IP6:
461 case NFT_CT_DST_IP6:
462 if (tb[NFTA_CT_DIRECTION] == NULL)
463 return -EINVAL;
464
465 len = sizeof_field(struct nf_conntrack_tuple, src.u3.ip6);
466 break;
467 case NFT_CT_PROTO_SRC:
468 case NFT_CT_PROTO_DST:
469 if (tb[NFTA_CT_DIRECTION] == NULL)
470 return -EINVAL;
471 len = sizeof_field(struct nf_conntrack_tuple, src.u.all);
472 break;
473 case NFT_CT_BYTES:
474 case NFT_CT_PKTS:
475 case NFT_CT_AVGPKT:
476 len = sizeof(u64);
477 break;
478 #ifdef CONFIG_NF_CONNTRACK_ZONES
479 case NFT_CT_ZONE:
480 len = sizeof(u16);
481 break;
482 #endif
483 case NFT_CT_ID:
484 len = sizeof(u32);
485 break;
486 default:
487 return -EOPNOTSUPP;
488 }
489
490 if (tb[NFTA_CT_DIRECTION] != NULL) {
491 priv->dir = nla_get_u8(tb[NFTA_CT_DIRECTION]);
492 switch (priv->dir) {
493 case IP_CT_DIR_ORIGINAL:
494 case IP_CT_DIR_REPLY:
495 break;
496 default:
497 return -EINVAL;
498 }
499 }
500
501 priv->dreg = nft_parse_register(tb[NFTA_CT_DREG]);
502 err = nft_validate_register_store(ctx, priv->dreg, NULL,
503 NFT_DATA_VALUE, len);
504 if (err < 0)
505 return err;
506
507 err = nf_ct_netns_get(ctx->net, ctx->family);
508 if (err < 0)
509 return err;
510
511 if (priv->key == NFT_CT_BYTES ||
512 priv->key == NFT_CT_PKTS ||
513 priv->key == NFT_CT_AVGPKT)
514 nf_ct_set_acct(ctx->net, true);
515
516 return 0;
517 }
518
519 static void __nft_ct_set_destroy(const struct nft_ctx *ctx, struct nft_ct *priv)
520 {
521 switch (priv->key) {
522 #ifdef CONFIG_NF_CONNTRACK_LABELS
523 case NFT_CT_LABELS:
524 nf_connlabels_put(ctx->net);
525 break;
526 #endif
527 #ifdef CONFIG_NF_CONNTRACK_ZONES
528 case NFT_CT_ZONE:
529 if (--nft_ct_pcpu_template_refcnt == 0)
530 nft_ct_tmpl_put_pcpu();
531 #endif
532 default:
533 break;
534 }
535 }
536
537 static int nft_ct_set_init(const struct nft_ctx *ctx,
538 const struct nft_expr *expr,
539 const struct nlattr * const tb[])
540 {
541 struct nft_ct *priv = nft_expr_priv(expr);
542 unsigned int len;
543 int err;
544
545 priv->dir = IP_CT_DIR_MAX;
546 priv->key = ntohl(nla_get_be32(tb[NFTA_CT_KEY]));
547 switch (priv->key) {
548 #ifdef CONFIG_NF_CONNTRACK_MARK
549 case NFT_CT_MARK:
550 if (tb[NFTA_CT_DIRECTION])
551 return -EINVAL;
552 len = sizeof_field(struct nf_conn, mark);
553 break;
554 #endif
555 #ifdef CONFIG_NF_CONNTRACK_LABELS
556 case NFT_CT_LABELS:
557 if (tb[NFTA_CT_DIRECTION])
558 return -EINVAL;
559 len = NF_CT_LABELS_MAX_SIZE;
560 err = nf_connlabels_get(ctx->net, (len * BITS_PER_BYTE) - 1);
561 if (err)
562 return err;
563 break;
564 #endif
565 #ifdef CONFIG_NF_CONNTRACK_ZONES
566 case NFT_CT_ZONE:
567 if (!nft_ct_tmpl_alloc_pcpu())
568 return -ENOMEM;
569 nft_ct_pcpu_template_refcnt++;
570 len = sizeof(u16);
571 break;
572 #endif
573 #ifdef CONFIG_NF_CONNTRACK_EVENTS
574 case NFT_CT_EVENTMASK:
575 if (tb[NFTA_CT_DIRECTION])
576 return -EINVAL;
577 len = sizeof(u32);
578 break;
579 #endif
580 #ifdef CONFIG_NF_CONNTRACK_SECMARK
581 case NFT_CT_SECMARK:
582 if (tb[NFTA_CT_DIRECTION])
583 return -EINVAL;
584 len = sizeof(u32);
585 break;
586 #endif
587 default:
588 return -EOPNOTSUPP;
589 }
590
591 if (tb[NFTA_CT_DIRECTION]) {
592 priv->dir = nla_get_u8(tb[NFTA_CT_DIRECTION]);
593 switch (priv->dir) {
594 case IP_CT_DIR_ORIGINAL:
595 case IP_CT_DIR_REPLY:
596 break;
597 default:
598 err = -EINVAL;
599 goto err1;
600 }
601 }
602
603 priv->sreg = nft_parse_register(tb[NFTA_CT_SREG]);
604 err = nft_validate_register_load(priv->sreg, len);
605 if (err < 0)
606 goto err1;
607
608 err = nf_ct_netns_get(ctx->net, ctx->family);
609 if (err < 0)
610 goto err1;
611
612 return 0;
613
614 err1:
615 __nft_ct_set_destroy(ctx, priv);
616 return err;
617 }
618
619 static void nft_ct_get_destroy(const struct nft_ctx *ctx,
620 const struct nft_expr *expr)
621 {
622 nf_ct_netns_put(ctx->net, ctx->family);
623 }
624
625 static void nft_ct_set_destroy(const struct nft_ctx *ctx,
626 const struct nft_expr *expr)
627 {
628 struct nft_ct *priv = nft_expr_priv(expr);
629
630 __nft_ct_set_destroy(ctx, priv);
631 nf_ct_netns_put(ctx->net, ctx->family);
632 }
633
634 static int nft_ct_get_dump(struct sk_buff *skb, const struct nft_expr *expr)
635 {
636 const struct nft_ct *priv = nft_expr_priv(expr);
637
638 if (nft_dump_register(skb, NFTA_CT_DREG, priv->dreg))
639 goto nla_put_failure;
640 if (nla_put_be32(skb, NFTA_CT_KEY, htonl(priv->key)))
641 goto nla_put_failure;
642
643 switch (priv->key) {
644 case NFT_CT_SRC:
645 case NFT_CT_DST:
646 case NFT_CT_SRC_IP:
647 case NFT_CT_DST_IP:
648 case NFT_CT_SRC_IP6:
649 case NFT_CT_DST_IP6:
650 case NFT_CT_PROTO_SRC:
651 case NFT_CT_PROTO_DST:
652 if (nla_put_u8(skb, NFTA_CT_DIRECTION, priv->dir))
653 goto nla_put_failure;
654 break;
655 case NFT_CT_BYTES:
656 case NFT_CT_PKTS:
657 case NFT_CT_AVGPKT:
658 case NFT_CT_ZONE:
659 if (priv->dir < IP_CT_DIR_MAX &&
660 nla_put_u8(skb, NFTA_CT_DIRECTION, priv->dir))
661 goto nla_put_failure;
662 break;
663 default:
664 break;
665 }
666
667 return 0;
668
669 nla_put_failure:
670 return -1;
671 }
672
673 static int nft_ct_set_dump(struct sk_buff *skb, const struct nft_expr *expr)
674 {
675 const struct nft_ct *priv = nft_expr_priv(expr);
676
677 if (nft_dump_register(skb, NFTA_CT_SREG, priv->sreg))
678 goto nla_put_failure;
679 if (nla_put_be32(skb, NFTA_CT_KEY, htonl(priv->key)))
680 goto nla_put_failure;
681
682 switch (priv->key) {
683 case NFT_CT_ZONE:
684 if (priv->dir < IP_CT_DIR_MAX &&
685 nla_put_u8(skb, NFTA_CT_DIRECTION, priv->dir))
686 goto nla_put_failure;
687 break;
688 default:
689 break;
690 }
691
692 return 0;
693
694 nla_put_failure:
695 return -1;
696 }
697
698 static struct nft_expr_type nft_ct_type;
699 static const struct nft_expr_ops nft_ct_get_ops = {
700 .type = &nft_ct_type,
701 .size = NFT_EXPR_SIZE(sizeof(struct nft_ct)),
702 .eval = nft_ct_get_eval,
703 .init = nft_ct_get_init,
704 .destroy = nft_ct_get_destroy,
705 .dump = nft_ct_get_dump,
706 };
707
708 static const struct nft_expr_ops nft_ct_set_ops = {
709 .type = &nft_ct_type,
710 .size = NFT_EXPR_SIZE(sizeof(struct nft_ct)),
711 .eval = nft_ct_set_eval,
712 .init = nft_ct_set_init,
713 .destroy = nft_ct_set_destroy,
714 .dump = nft_ct_set_dump,
715 };
716
717 #ifdef CONFIG_NF_CONNTRACK_ZONES
718 static const struct nft_expr_ops nft_ct_set_zone_ops = {
719 .type = &nft_ct_type,
720 .size = NFT_EXPR_SIZE(sizeof(struct nft_ct)),
721 .eval = nft_ct_set_zone_eval,
722 .init = nft_ct_set_init,
723 .destroy = nft_ct_set_destroy,
724 .dump = nft_ct_set_dump,
725 };
726 #endif
727
728 static const struct nft_expr_ops *
729 nft_ct_select_ops(const struct nft_ctx *ctx,
730 const struct nlattr * const tb[])
731 {
732 if (tb[NFTA_CT_KEY] == NULL)
733 return ERR_PTR(-EINVAL);
734
735 if (tb[NFTA_CT_DREG] && tb[NFTA_CT_SREG])
736 return ERR_PTR(-EINVAL);
737
738 if (tb[NFTA_CT_DREG])
739 return &nft_ct_get_ops;
740
741 if (tb[NFTA_CT_SREG]) {
742 #ifdef CONFIG_NF_CONNTRACK_ZONES
743 if (nla_get_be32(tb[NFTA_CT_KEY]) == htonl(NFT_CT_ZONE))
744 return &nft_ct_set_zone_ops;
745 #endif
746 return &nft_ct_set_ops;
747 }
748
749 return ERR_PTR(-EINVAL);
750 }
751
752 static struct nft_expr_type nft_ct_type __read_mostly = {
753 .name = "ct",
754 .select_ops = nft_ct_select_ops,
755 .policy = nft_ct_policy,
756 .maxattr = NFTA_CT_MAX,
757 .owner = THIS_MODULE,
758 };
759
760 static void nft_notrack_eval(const struct nft_expr *expr,
761 struct nft_regs *regs,
762 const struct nft_pktinfo *pkt)
763 {
764 struct sk_buff *skb = pkt->skb;
765 enum ip_conntrack_info ctinfo;
766 struct nf_conn *ct;
767
768 ct = nf_ct_get(pkt->skb, &ctinfo);
769 /* Previously seen (loopback or untracked)? Ignore. */
770 if (ct || ctinfo == IP_CT_UNTRACKED)
771 return;
772
773 nf_ct_set(skb, ct, IP_CT_UNTRACKED);
774 }
775
776 static struct nft_expr_type nft_notrack_type;
777 static const struct nft_expr_ops nft_notrack_ops = {
778 .type = &nft_notrack_type,
779 .size = NFT_EXPR_SIZE(0),
780 .eval = nft_notrack_eval,
781 };
782
783 static struct nft_expr_type nft_notrack_type __read_mostly = {
784 .name = "notrack",
785 .ops = &nft_notrack_ops,
786 .owner = THIS_MODULE,
787 };
788
789 #ifdef CONFIG_NF_CONNTRACK_TIMEOUT
790 static int
791 nft_ct_timeout_parse_policy(void *timeouts,
792 const struct nf_conntrack_l4proto *l4proto,
793 struct net *net, const struct nlattr *attr)
794 {
795 struct nlattr **tb;
796 int ret = 0;
797
798 tb = kcalloc(l4proto->ctnl_timeout.nlattr_max + 1, sizeof(*tb),
799 GFP_KERNEL);
800
801 if (!tb)
802 return -ENOMEM;
803
804 ret = nla_parse_nested_deprecated(tb,
805 l4proto->ctnl_timeout.nlattr_max,
806 attr,
807 l4proto->ctnl_timeout.nla_policy,
808 NULL);
809 if (ret < 0)
810 goto err;
811
812 ret = l4proto->ctnl_timeout.nlattr_to_obj(tb, net, timeouts);
813
814 err:
815 kfree(tb);
816 return ret;
817 }
818
819 struct nft_ct_timeout_obj {
820 struct nf_ct_timeout *timeout;
821 u8 l4proto;
822 };
823
824 static void nft_ct_timeout_obj_eval(struct nft_object *obj,
825 struct nft_regs *regs,
826 const struct nft_pktinfo *pkt)
827 {
828 const struct nft_ct_timeout_obj *priv = nft_obj_data(obj);
829 struct nf_conn *ct = (struct nf_conn *)skb_nfct(pkt->skb);
830 struct nf_conn_timeout *timeout;
831 const unsigned int *values;
832
833 if (priv->l4proto != pkt->tprot)
834 return;
835
836 if (!ct || nf_ct_is_template(ct) || nf_ct_is_confirmed(ct))
837 return;
838
839 timeout = nf_ct_timeout_find(ct);
840 if (!timeout) {
841 timeout = nf_ct_timeout_ext_add(ct, priv->timeout, GFP_ATOMIC);
842 if (!timeout) {
843 regs->verdict.code = NF_DROP;
844 return;
845 }
846 }
847
848 rcu_assign_pointer(timeout->timeout, priv->timeout);
849
850 /* adjust the timeout as per 'new' state. ct is unconfirmed,
851 * so the current timestamp must not be added.
852 */
853 values = nf_ct_timeout_data(timeout);
854 if (values)
855 nf_ct_refresh(ct, pkt->skb, values[0]);
856 }
857
858 static int nft_ct_timeout_obj_init(const struct nft_ctx *ctx,
859 const struct nlattr * const tb[],
860 struct nft_object *obj)
861 {
862 struct nft_ct_timeout_obj *priv = nft_obj_data(obj);
863 const struct nf_conntrack_l4proto *l4proto;
864 struct nf_ct_timeout *timeout;
865 int l3num = ctx->family;
866 __u8 l4num;
867 int ret;
868
869 if (!tb[NFTA_CT_TIMEOUT_L4PROTO] ||
870 !tb[NFTA_CT_TIMEOUT_DATA])
871 return -EINVAL;
872
873 if (tb[NFTA_CT_TIMEOUT_L3PROTO])
874 l3num = ntohs(nla_get_be16(tb[NFTA_CT_TIMEOUT_L3PROTO]));
875
876 l4num = nla_get_u8(tb[NFTA_CT_TIMEOUT_L4PROTO]);
877 priv->l4proto = l4num;
878
879 l4proto = nf_ct_l4proto_find(l4num);
880
881 if (l4proto->l4proto != l4num) {
882 ret = -EOPNOTSUPP;
883 goto err_proto_put;
884 }
885
886 timeout = kzalloc(sizeof(struct nf_ct_timeout) +
887 l4proto->ctnl_timeout.obj_size, GFP_KERNEL);
888 if (timeout == NULL) {
889 ret = -ENOMEM;
890 goto err_proto_put;
891 }
892
893 ret = nft_ct_timeout_parse_policy(&timeout->data, l4proto, ctx->net,
894 tb[NFTA_CT_TIMEOUT_DATA]);
895 if (ret < 0)
896 goto err_free_timeout;
897
898 timeout->l3num = l3num;
899 timeout->l4proto = l4proto;
900
901 ret = nf_ct_netns_get(ctx->net, ctx->family);
902 if (ret < 0)
903 goto err_free_timeout;
904
905 priv->timeout = timeout;
906 return 0;
907
908 err_free_timeout:
909 kfree(timeout);
910 err_proto_put:
911 return ret;
912 }
913
914 static void nft_ct_timeout_obj_destroy(const struct nft_ctx *ctx,
915 struct nft_object *obj)
916 {
917 struct nft_ct_timeout_obj *priv = nft_obj_data(obj);
918 struct nf_ct_timeout *timeout = priv->timeout;
919
920 nf_ct_untimeout(ctx->net, timeout);
921 nf_ct_netns_put(ctx->net, ctx->family);
922 kfree(priv->timeout);
923 }
924
925 static int nft_ct_timeout_obj_dump(struct sk_buff *skb,
926 struct nft_object *obj, bool reset)
927 {
928 const struct nft_ct_timeout_obj *priv = nft_obj_data(obj);
929 const struct nf_ct_timeout *timeout = priv->timeout;
930 struct nlattr *nest_params;
931 int ret;
932
933 if (nla_put_u8(skb, NFTA_CT_TIMEOUT_L4PROTO, timeout->l4proto->l4proto) ||
934 nla_put_be16(skb, NFTA_CT_TIMEOUT_L3PROTO, htons(timeout->l3num)))
935 return -1;
936
937 nest_params = nla_nest_start(skb, NFTA_CT_TIMEOUT_DATA);
938 if (!nest_params)
939 return -1;
940
941 ret = timeout->l4proto->ctnl_timeout.obj_to_nlattr(skb, &timeout->data);
942 if (ret < 0)
943 return -1;
944 nla_nest_end(skb, nest_params);
945 return 0;
946 }
947
948 static const struct nla_policy nft_ct_timeout_policy[NFTA_CT_TIMEOUT_MAX + 1] = {
949 [NFTA_CT_TIMEOUT_L3PROTO] = {.type = NLA_U16 },
950 [NFTA_CT_TIMEOUT_L4PROTO] = {.type = NLA_U8 },
951 [NFTA_CT_TIMEOUT_DATA] = {.type = NLA_NESTED },
952 };
953
954 static struct nft_object_type nft_ct_timeout_obj_type;
955
956 static const struct nft_object_ops nft_ct_timeout_obj_ops = {
957 .type = &nft_ct_timeout_obj_type,
958 .size = sizeof(struct nft_ct_timeout_obj),
959 .eval = nft_ct_timeout_obj_eval,
960 .init = nft_ct_timeout_obj_init,
961 .destroy = nft_ct_timeout_obj_destroy,
962 .dump = nft_ct_timeout_obj_dump,
963 };
964
965 static struct nft_object_type nft_ct_timeout_obj_type __read_mostly = {
966 .type = NFT_OBJECT_CT_TIMEOUT,
967 .ops = &nft_ct_timeout_obj_ops,
968 .maxattr = NFTA_CT_TIMEOUT_MAX,
969 .policy = nft_ct_timeout_policy,
970 .owner = THIS_MODULE,
971 };
972 #endif /* CONFIG_NF_CONNTRACK_TIMEOUT */
973
974 static int nft_ct_helper_obj_init(const struct nft_ctx *ctx,
975 const struct nlattr * const tb[],
976 struct nft_object *obj)
977 {
978 struct nft_ct_helper_obj *priv = nft_obj_data(obj);
979 struct nf_conntrack_helper *help4, *help6;
980 char name[NF_CT_HELPER_NAME_LEN];
981 int family = ctx->family;
982 int err;
983
984 if (!tb[NFTA_CT_HELPER_NAME] || !tb[NFTA_CT_HELPER_L4PROTO])
985 return -EINVAL;
986
987 priv->l4proto = nla_get_u8(tb[NFTA_CT_HELPER_L4PROTO]);
988 if (!priv->l4proto)
989 return -ENOENT;
990
991 nla_strscpy(name, tb[NFTA_CT_HELPER_NAME], sizeof(name));
992
993 if (tb[NFTA_CT_HELPER_L3PROTO])
994 family = ntohs(nla_get_be16(tb[NFTA_CT_HELPER_L3PROTO]));
995
996 help4 = NULL;
997 help6 = NULL;
998
999 switch (family) {
1000 case NFPROTO_IPV4:
1001 if (ctx->family == NFPROTO_IPV6)
1002 return -EINVAL;
1003
1004 help4 = nf_conntrack_helper_try_module_get(name, family,
1005 priv->l4proto);
1006 break;
1007 case NFPROTO_IPV6:
1008 if (ctx->family == NFPROTO_IPV4)
1009 return -EINVAL;
1010
1011 help6 = nf_conntrack_helper_try_module_get(name, family,
1012 priv->l4proto);
1013 break;
1014 case NFPROTO_NETDEV:
1015 case NFPROTO_BRIDGE:
1016 case NFPROTO_INET:
1017 help4 = nf_conntrack_helper_try_module_get(name, NFPROTO_IPV4,
1018 priv->l4proto);
1019 help6 = nf_conntrack_helper_try_module_get(name, NFPROTO_IPV6,
1020 priv->l4proto);
1021 break;
1022 default:
1023 return -EAFNOSUPPORT;
1024 }
1025
1026 /* && is intentional; only error if INET found neither ipv4 or ipv6 */
1027 if (!help4 && !help6)
1028 return -ENOENT;
1029
1030 priv->helper4 = help4;
1031 priv->helper6 = help6;
1032
1033 err = nf_ct_netns_get(ctx->net, ctx->family);
1034 if (err < 0)
1035 goto err_put_helper;
1036
1037 return 0;
1038
1039 err_put_helper:
1040 if (priv->helper4)
1041 nf_conntrack_helper_put(priv->helper4);
1042 if (priv->helper6)
1043 nf_conntrack_helper_put(priv->helper6);
1044 return err;
1045 }
1046
1047 static void nft_ct_helper_obj_destroy(const struct nft_ctx *ctx,
1048 struct nft_object *obj)
1049 {
1050 struct nft_ct_helper_obj *priv = nft_obj_data(obj);
1051
1052 if (priv->helper4)
1053 nf_conntrack_helper_put(priv->helper4);
1054 if (priv->helper6)
1055 nf_conntrack_helper_put(priv->helper6);
1056
1057 nf_ct_netns_put(ctx->net, ctx->family);
1058 }
1059
1060 static void nft_ct_helper_obj_eval(struct nft_object *obj,
1061 struct nft_regs *regs,
1062 const struct nft_pktinfo *pkt)
1063 {
1064 const struct nft_ct_helper_obj *priv = nft_obj_data(obj);
1065 struct nf_conn *ct = (struct nf_conn *)skb_nfct(pkt->skb);
1066 struct nf_conntrack_helper *to_assign = NULL;
1067 struct nf_conn_help *help;
1068
1069 if (!ct ||
1070 nf_ct_is_confirmed(ct) ||
1071 nf_ct_is_template(ct) ||
1072 priv->l4proto != nf_ct_protonum(ct))
1073 return;
1074
1075 switch (nf_ct_l3num(ct)) {
1076 case NFPROTO_IPV4:
1077 to_assign = priv->helper4;
1078 break;
1079 case NFPROTO_IPV6:
1080 to_assign = priv->helper6;
1081 break;
1082 default:
1083 WARN_ON_ONCE(1);
1084 return;
1085 }
1086
1087 if (!to_assign)
1088 return;
1089
1090 if (test_bit(IPS_HELPER_BIT, &ct->status))
1091 return;
1092
1093 help = nf_ct_helper_ext_add(ct, GFP_ATOMIC);
1094 if (help) {
1095 rcu_assign_pointer(help->helper, to_assign);
1096 set_bit(IPS_HELPER_BIT, &ct->status);
1097 }
1098 }
1099
1100 static int nft_ct_helper_obj_dump(struct sk_buff *skb,
1101 struct nft_object *obj, bool reset)
1102 {
1103 const struct nft_ct_helper_obj *priv = nft_obj_data(obj);
1104 const struct nf_conntrack_helper *helper;
1105 u16 family;
1106
1107 if (priv->helper4 && priv->helper6) {
1108 family = NFPROTO_INET;
1109 helper = priv->helper4;
1110 } else if (priv->helper6) {
1111 family = NFPROTO_IPV6;
1112 helper = priv->helper6;
1113 } else {
1114 family = NFPROTO_IPV4;
1115 helper = priv->helper4;
1116 }
1117
1118 if (nla_put_string(skb, NFTA_CT_HELPER_NAME, helper->name))
1119 return -1;
1120
1121 if (nla_put_u8(skb, NFTA_CT_HELPER_L4PROTO, priv->l4proto))
1122 return -1;
1123
1124 if (nla_put_be16(skb, NFTA_CT_HELPER_L3PROTO, htons(family)))
1125 return -1;
1126
1127 return 0;
1128 }
1129
1130 static const struct nla_policy nft_ct_helper_policy[NFTA_CT_HELPER_MAX + 1] = {
1131 [NFTA_CT_HELPER_NAME] = { .type = NLA_STRING,
1132 .len = NF_CT_HELPER_NAME_LEN - 1 },
1133 [NFTA_CT_HELPER_L3PROTO] = { .type = NLA_U16 },
1134 [NFTA_CT_HELPER_L4PROTO] = { .type = NLA_U8 },
1135 };
1136
1137 static struct nft_object_type nft_ct_helper_obj_type;
1138 static const struct nft_object_ops nft_ct_helper_obj_ops = {
1139 .type = &nft_ct_helper_obj_type,
1140 .size = sizeof(struct nft_ct_helper_obj),
1141 .eval = nft_ct_helper_obj_eval,
1142 .init = nft_ct_helper_obj_init,
1143 .destroy = nft_ct_helper_obj_destroy,
1144 .dump = nft_ct_helper_obj_dump,
1145 };
1146
1147 static struct nft_object_type nft_ct_helper_obj_type __read_mostly = {
1148 .type = NFT_OBJECT_CT_HELPER,
1149 .ops = &nft_ct_helper_obj_ops,
1150 .maxattr = NFTA_CT_HELPER_MAX,
1151 .policy = nft_ct_helper_policy,
1152 .owner = THIS_MODULE,
1153 };
1154
1155 struct nft_ct_expect_obj {
1156 u16 l3num;
1157 __be16 dport;
1158 u8 l4proto;
1159 u8 size;
1160 u32 timeout;
1161 };
1162
1163 static int nft_ct_expect_obj_init(const struct nft_ctx *ctx,
1164 const struct nlattr * const tb[],
1165 struct nft_object *obj)
1166 {
1167 struct nft_ct_expect_obj *priv = nft_obj_data(obj);
1168
1169 if (!tb[NFTA_CT_EXPECT_L4PROTO] ||
1170 !tb[NFTA_CT_EXPECT_DPORT] ||
1171 !tb[NFTA_CT_EXPECT_TIMEOUT] ||
1172 !tb[NFTA_CT_EXPECT_SIZE])
1173 return -EINVAL;
1174
1175 priv->l3num = ctx->family;
1176 if (tb[NFTA_CT_EXPECT_L3PROTO])
1177 priv->l3num = ntohs(nla_get_be16(tb[NFTA_CT_EXPECT_L3PROTO]));
1178
1179 priv->l4proto = nla_get_u8(tb[NFTA_CT_EXPECT_L4PROTO]);
1180 priv->dport = nla_get_be16(tb[NFTA_CT_EXPECT_DPORT]);
1181 priv->timeout = nla_get_u32(tb[NFTA_CT_EXPECT_TIMEOUT]);
1182 priv->size = nla_get_u8(tb[NFTA_CT_EXPECT_SIZE]);
1183
1184 return nf_ct_netns_get(ctx->net, ctx->family);
1185 }
1186
1187 static void nft_ct_expect_obj_destroy(const struct nft_ctx *ctx,
1188 struct nft_object *obj)
1189 {
1190 nf_ct_netns_put(ctx->net, ctx->family);
1191 }
1192
1193 static int nft_ct_expect_obj_dump(struct sk_buff *skb,
1194 struct nft_object *obj, bool reset)
1195 {
1196 const struct nft_ct_expect_obj *priv = nft_obj_data(obj);
1197
1198 if (nla_put_be16(skb, NFTA_CT_EXPECT_L3PROTO, htons(priv->l3num)) ||
1199 nla_put_u8(skb, NFTA_CT_EXPECT_L4PROTO, priv->l4proto) ||
1200 nla_put_be16(skb, NFTA_CT_EXPECT_DPORT, priv->dport) ||
1201 nla_put_u32(skb, NFTA_CT_EXPECT_TIMEOUT, priv->timeout) ||
1202 nla_put_u8(skb, NFTA_CT_EXPECT_SIZE, priv->size))
1203 return -1;
1204
1205 return 0;
1206 }
1207
1208 static void nft_ct_expect_obj_eval(struct nft_object *obj,
1209 struct nft_regs *regs,
1210 const struct nft_pktinfo *pkt)
1211 {
1212 const struct nft_ct_expect_obj *priv = nft_obj_data(obj);
1213 struct nf_conntrack_expect *exp;
1214 enum ip_conntrack_info ctinfo;
1215 struct nf_conn_help *help;
1216 enum ip_conntrack_dir dir;
1217 u16 l3num = priv->l3num;
1218 struct nf_conn *ct;
1219
1220 ct = nf_ct_get(pkt->skb, &ctinfo);
1221 if (!ct || ctinfo == IP_CT_UNTRACKED) {
1222 regs->verdict.code = NFT_BREAK;
1223 return;
1224 }
1225 dir = CTINFO2DIR(ctinfo);
1226
1227 help = nfct_help(ct);
1228 if (!help)
1229 help = nf_ct_helper_ext_add(ct, GFP_ATOMIC);
1230 if (!help) {
1231 regs->verdict.code = NF_DROP;
1232 return;
1233 }
1234
1235 if (help->expecting[NF_CT_EXPECT_CLASS_DEFAULT] >= priv->size) {
1236 regs->verdict.code = NFT_BREAK;
1237 return;
1238 }
1239 if (l3num == NFPROTO_INET)
1240 l3num = nf_ct_l3num(ct);
1241
1242 exp = nf_ct_expect_alloc(ct);
1243 if (exp == NULL) {
1244 regs->verdict.code = NF_DROP;
1245 return;
1246 }
1247 nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT, l3num,
1248 &ct->tuplehash[!dir].tuple.src.u3,
1249 &ct->tuplehash[!dir].tuple.dst.u3,
1250 priv->l4proto, NULL, &priv->dport);
1251 exp->timeout.expires = jiffies + priv->timeout * HZ;
1252
1253 if (nf_ct_expect_related(exp, 0) != 0)
1254 regs->verdict.code = NF_DROP;
1255 }
1256
1257 static const struct nla_policy nft_ct_expect_policy[NFTA_CT_EXPECT_MAX + 1] = {
1258 [NFTA_CT_EXPECT_L3PROTO] = { .type = NLA_U16 },
1259 [NFTA_CT_EXPECT_L4PROTO] = { .type = NLA_U8 },
1260 [NFTA_CT_EXPECT_DPORT] = { .type = NLA_U16 },
1261 [NFTA_CT_EXPECT_TIMEOUT] = { .type = NLA_U32 },
1262 [NFTA_CT_EXPECT_SIZE] = { .type = NLA_U8 },
1263 };
1264
1265 static struct nft_object_type nft_ct_expect_obj_type;
1266
1267 static const struct nft_object_ops nft_ct_expect_obj_ops = {
1268 .type = &nft_ct_expect_obj_type,
1269 .size = sizeof(struct nft_ct_expect_obj),
1270 .eval = nft_ct_expect_obj_eval,
1271 .init = nft_ct_expect_obj_init,
1272 .destroy = nft_ct_expect_obj_destroy,
1273 .dump = nft_ct_expect_obj_dump,
1274 };
1275
1276 static struct nft_object_type nft_ct_expect_obj_type __read_mostly = {
1277 .type = NFT_OBJECT_CT_EXPECT,
1278 .ops = &nft_ct_expect_obj_ops,
1279 .maxattr = NFTA_CT_EXPECT_MAX,
1280 .policy = nft_ct_expect_policy,
1281 .owner = THIS_MODULE,
1282 };
1283
1284 static int __init nft_ct_module_init(void)
1285 {
1286 int err;
1287
1288 BUILD_BUG_ON(NF_CT_LABELS_MAX_SIZE > NFT_REG_SIZE);
1289
1290 err = nft_register_expr(&nft_ct_type);
1291 if (err < 0)
1292 return err;
1293
1294 err = nft_register_expr(&nft_notrack_type);
1295 if (err < 0)
1296 goto err1;
1297
1298 err = nft_register_obj(&nft_ct_helper_obj_type);
1299 if (err < 0)
1300 goto err2;
1301
1302 err = nft_register_obj(&nft_ct_expect_obj_type);
1303 if (err < 0)
1304 goto err3;
1305 #ifdef CONFIG_NF_CONNTRACK_TIMEOUT
1306 err = nft_register_obj(&nft_ct_timeout_obj_type);
1307 if (err < 0)
1308 goto err4;
1309 #endif
1310 return 0;
1311
1312 #ifdef CONFIG_NF_CONNTRACK_TIMEOUT
1313 err4:
1314 nft_unregister_obj(&nft_ct_expect_obj_type);
1315 #endif
1316 err3:
1317 nft_unregister_obj(&nft_ct_helper_obj_type);
1318 err2:
1319 nft_unregister_expr(&nft_notrack_type);
1320 err1:
1321 nft_unregister_expr(&nft_ct_type);
1322 return err;
1323 }
1324
1325 static void __exit nft_ct_module_exit(void)
1326 {
1327 #ifdef CONFIG_NF_CONNTRACK_TIMEOUT
1328 nft_unregister_obj(&nft_ct_timeout_obj_type);
1329 #endif
1330 nft_unregister_obj(&nft_ct_expect_obj_type);
1331 nft_unregister_obj(&nft_ct_helper_obj_type);
1332 nft_unregister_expr(&nft_notrack_type);
1333 nft_unregister_expr(&nft_ct_type);
1334 }
1335
1336 module_init(nft_ct_module_init);
1337 module_exit(nft_ct_module_exit);
1338
1339 MODULE_LICENSE("GPL");
1340 MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
1341 MODULE_ALIAS_NFT_EXPR("ct");
1342 MODULE_ALIAS_NFT_EXPR("notrack");
1343 MODULE_ALIAS_NFT_OBJ(NFT_OBJECT_CT_HELPER);
1344 MODULE_ALIAS_NFT_OBJ(NFT_OBJECT_CT_TIMEOUT);
1345 MODULE_ALIAS_NFT_OBJ(NFT_OBJECT_CT_EXPECT);
1346 MODULE_DESCRIPTION("Netfilter nf_tables conntrack module");
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