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21#define pr_fmt(fmt) "IPv6: " fmt
22
23#include <linux/module.h>
24#include <linux/capability.h>
25#include <linux/errno.h>
26#include <linux/types.h>
27#include <linux/socket.h>
28#include <linux/in.h>
29#include <linux/kernel.h>
30#include <linux/timer.h>
31#include <linux/string.h>
32#include <linux/sockios.h>
33#include <linux/net.h>
34#include <linux/fcntl.h>
35#include <linux/mm.h>
36#include <linux/interrupt.h>
37#include <linux/proc_fs.h>
38#include <linux/stat.h>
39#include <linux/init.h>
40#include <linux/slab.h>
41
42#include <linux/inet.h>
43#include <linux/netdevice.h>
44#include <linux/icmpv6.h>
45#include <linux/netfilter_ipv6.h>
46
47#include <net/ip.h>
48#include <net/ipv6.h>
49#include <net/udp.h>
50#include <net/udplite.h>
51#include <net/tcp.h>
52#include <net/ping.h>
53#include <net/protocol.h>
54#include <net/inet_common.h>
55#include <net/route.h>
56#include <net/transp_v6.h>
57#include <net/ip6_route.h>
58#include <net/addrconf.h>
59#include <net/ndisc.h>
60#ifdef CONFIG_IPV6_TUNNEL
61#include <net/ip6_tunnel.h>
62#endif
63
64#include <asm/uaccess.h>
65#include <linux/mroute6.h>
66
67MODULE_AUTHOR("Cast of dozens");
68MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
69MODULE_LICENSE("GPL");
70
71
72
73
74static struct list_head inetsw6[SOCK_MAX];
75static DEFINE_SPINLOCK(inetsw6_lock);
76
77struct ipv6_params ipv6_defaults = {
78 .disable_ipv6 = 0,
79 .autoconf = 1,
80};
81
82static int disable_ipv6_mod;
83
84module_param_named(disable, disable_ipv6_mod, int, 0444);
85MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional");
86
87module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444);
88MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces");
89
90module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444);
91MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces");
92
93static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
94{
95 const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
96
97 return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
98}
99
100static int inet6_create(struct net *net, struct socket *sock, int protocol,
101 int kern)
102{
103 struct inet_sock *inet;
104 struct ipv6_pinfo *np;
105 struct sock *sk;
106 struct inet_protosw *answer;
107 struct proto *answer_prot;
108 unsigned char answer_flags;
109 char answer_no_check;
110 int try_loading_module = 0;
111 int err;
112
113 if (sock->type != SOCK_RAW &&
114 sock->type != SOCK_DGRAM &&
115 !inet_ehash_secret)
116 build_ehash_secret();
117
118
119lookup_protocol:
120 err = -ESOCKTNOSUPPORT;
121 rcu_read_lock();
122 list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
123
124 err = 0;
125
126 if (protocol == answer->protocol) {
127 if (protocol != IPPROTO_IP)
128 break;
129 } else {
130
131 if (IPPROTO_IP == protocol) {
132 protocol = answer->protocol;
133 break;
134 }
135 if (IPPROTO_IP == answer->protocol)
136 break;
137 }
138 err = -EPROTONOSUPPORT;
139 }
140
141 if (err) {
142 if (try_loading_module < 2) {
143 rcu_read_unlock();
144
145
146
147
148 if (++try_loading_module == 1)
149 request_module("net-pf-%d-proto-%d-type-%d",
150 PF_INET6, protocol, sock->type);
151
152
153
154
155 else
156 request_module("net-pf-%d-proto-%d",
157 PF_INET6, protocol);
158 goto lookup_protocol;
159 } else
160 goto out_rcu_unlock;
161 }
162
163 err = -EPERM;
164 if (sock->type == SOCK_RAW && !kern &&
165 !ns_capable(net->user_ns, CAP_NET_RAW))
166 goto out_rcu_unlock;
167
168 sock->ops = answer->ops;
169 answer_prot = answer->prot;
170 answer_no_check = answer->no_check;
171 answer_flags = answer->flags;
172 rcu_read_unlock();
173
174 WARN_ON(answer_prot->slab == NULL);
175
176 err = -ENOBUFS;
177 sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot);
178 if (sk == NULL)
179 goto out;
180
181 sock_init_data(sock, sk);
182
183 err = 0;
184 sk->sk_no_check = answer_no_check;
185 if (INET_PROTOSW_REUSE & answer_flags)
186 sk->sk_reuse = SK_CAN_REUSE;
187
188 inet = inet_sk(sk);
189 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
190
191 if (SOCK_RAW == sock->type) {
192 inet->inet_num = protocol;
193 if (IPPROTO_RAW == protocol)
194 inet->hdrincl = 1;
195 }
196
197 sk->sk_destruct = inet_sock_destruct;
198 sk->sk_family = PF_INET6;
199 sk->sk_protocol = protocol;
200
201 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
202
203 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
204 np->hop_limit = -1;
205 np->mcast_hops = IPV6_DEFAULT_MCASTHOPS;
206 np->mc_loop = 1;
207 np->pmtudisc = IPV6_PMTUDISC_WANT;
208 np->ipv6only = net->ipv6.sysctl.bindv6only;
209
210
211
212
213 inet->uc_ttl = -1;
214
215 inet->mc_loop = 1;
216 inet->mc_ttl = 1;
217 inet->mc_index = 0;
218 inet->mc_list = NULL;
219 inet->rcv_tos = 0;
220
221 if (ipv4_config.no_pmtu_disc)
222 inet->pmtudisc = IP_PMTUDISC_DONT;
223 else
224 inet->pmtudisc = IP_PMTUDISC_WANT;
225
226
227
228
229
230
231
232
233
234 sk_refcnt_debug_inc(sk);
235
236 if (inet->inet_num) {
237
238
239
240
241 inet->inet_sport = htons(inet->inet_num);
242 sk->sk_prot->hash(sk);
243 }
244 if (sk->sk_prot->init) {
245 err = sk->sk_prot->init(sk);
246 if (err) {
247 sk_common_release(sk);
248 goto out;
249 }
250 }
251out:
252 return err;
253out_rcu_unlock:
254 rcu_read_unlock();
255 goto out;
256}
257
258
259
260int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
261{
262 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr;
263 struct sock *sk = sock->sk;
264 struct inet_sock *inet = inet_sk(sk);
265 struct ipv6_pinfo *np = inet6_sk(sk);
266 struct net *net = sock_net(sk);
267 __be32 v4addr = 0;
268 unsigned short snum;
269 int addr_type = 0;
270 int err = 0;
271
272
273 if (sk->sk_prot->bind)
274 return sk->sk_prot->bind(sk, uaddr, addr_len);
275
276 if (addr_len < SIN6_LEN_RFC2133)
277 return -EINVAL;
278
279 if (addr->sin6_family != AF_INET6)
280 return -EAFNOSUPPORT;
281
282 addr_type = ipv6_addr_type(&addr->sin6_addr);
283 if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM)
284 return -EINVAL;
285
286 snum = ntohs(addr->sin6_port);
287 if (snum && snum < PROT_SOCK && !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
288 return -EACCES;
289
290 lock_sock(sk);
291
292
293 if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
294 err = -EINVAL;
295 goto out;
296 }
297
298
299 if (addr_type == IPV6_ADDR_MAPPED) {
300 int chk_addr_ret;
301
302
303
304
305 if (np->ipv6only) {
306 err = -EINVAL;
307 goto out;
308 }
309
310
311 v4addr = addr->sin6_addr.s6_addr32[3];
312 chk_addr_ret = inet_addr_type(net, v4addr);
313 if (!sysctl_ip_nonlocal_bind &&
314 !(inet->freebind || inet->transparent) &&
315 v4addr != htonl(INADDR_ANY) &&
316 chk_addr_ret != RTN_LOCAL &&
317 chk_addr_ret != RTN_MULTICAST &&
318 chk_addr_ret != RTN_BROADCAST) {
319 err = -EADDRNOTAVAIL;
320 goto out;
321 }
322 } else {
323 if (addr_type != IPV6_ADDR_ANY) {
324 struct net_device *dev = NULL;
325
326 rcu_read_lock();
327 if (__ipv6_addr_needs_scope_id(addr_type)) {
328 if (addr_len >= sizeof(struct sockaddr_in6) &&
329 addr->sin6_scope_id) {
330
331
332
333 sk->sk_bound_dev_if = addr->sin6_scope_id;
334 }
335
336
337 if (!sk->sk_bound_dev_if) {
338 err = -EINVAL;
339 goto out_unlock;
340 }
341 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
342 if (!dev) {
343 err = -ENODEV;
344 goto out_unlock;
345 }
346 }
347
348
349
350
351 v4addr = LOOPBACK4_IPV6;
352 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
353 if (!(inet->freebind || inet->transparent) &&
354 !ipv6_chk_addr(net, &addr->sin6_addr,
355 dev, 0)) {
356 err = -EADDRNOTAVAIL;
357 goto out_unlock;
358 }
359 }
360 rcu_read_unlock();
361 }
362 }
363
364 inet->inet_rcv_saddr = v4addr;
365 inet->inet_saddr = v4addr;
366
367 np->rcv_saddr = addr->sin6_addr;
368
369 if (!(addr_type & IPV6_ADDR_MULTICAST))
370 np->saddr = addr->sin6_addr;
371
372
373 if (sk->sk_prot->get_port(sk, snum)) {
374 inet_reset_saddr(sk);
375 err = -EADDRINUSE;
376 goto out;
377 }
378
379 if (addr_type != IPV6_ADDR_ANY) {
380 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
381 if (addr_type != IPV6_ADDR_MAPPED)
382 np->ipv6only = 1;
383 }
384 if (snum)
385 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
386 inet->inet_sport = htons(inet->inet_num);
387 inet->inet_dport = 0;
388 inet->inet_daddr = 0;
389out:
390 release_sock(sk);
391 return err;
392out_unlock:
393 rcu_read_unlock();
394 goto out;
395}
396EXPORT_SYMBOL(inet6_bind);
397
398int inet6_release(struct socket *sock)
399{
400 struct sock *sk = sock->sk;
401
402 if (sk == NULL)
403 return -EINVAL;
404
405
406 ipv6_sock_mc_close(sk);
407
408
409 ipv6_sock_ac_close(sk);
410
411 return inet_release(sock);
412}
413EXPORT_SYMBOL(inet6_release);
414
415void inet6_destroy_sock(struct sock *sk)
416{
417 struct ipv6_pinfo *np = inet6_sk(sk);
418 struct sk_buff *skb;
419 struct ipv6_txoptions *opt;
420
421
422
423 skb = xchg(&np->pktoptions, NULL);
424 if (skb != NULL)
425 kfree_skb(skb);
426
427 skb = xchg(&np->rxpmtu, NULL);
428 if (skb != NULL)
429 kfree_skb(skb);
430
431
432 fl6_free_socklist(sk);
433
434
435
436 opt = xchg(&np->opt, NULL);
437 if (opt != NULL)
438 sock_kfree_s(sk, opt, opt->tot_len);
439}
440EXPORT_SYMBOL_GPL(inet6_destroy_sock);
441
442
443
444
445
446int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
447 int *uaddr_len, int peer)
448{
449 struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
450 struct sock *sk = sock->sk;
451 struct inet_sock *inet = inet_sk(sk);
452 struct ipv6_pinfo *np = inet6_sk(sk);
453
454 sin->sin6_family = AF_INET6;
455 sin->sin6_flowinfo = 0;
456 sin->sin6_scope_id = 0;
457 if (peer) {
458 if (!inet->inet_dport)
459 return -ENOTCONN;
460 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
461 peer == 1)
462 return -ENOTCONN;
463 sin->sin6_port = inet->inet_dport;
464 sin->sin6_addr = np->daddr;
465 if (np->sndflow)
466 sin->sin6_flowinfo = np->flow_label;
467 } else {
468 if (ipv6_addr_any(&np->rcv_saddr))
469 sin->sin6_addr = np->saddr;
470 else
471 sin->sin6_addr = np->rcv_saddr;
472
473 sin->sin6_port = inet->inet_sport;
474 }
475 sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
476 sk->sk_bound_dev_if);
477 *uaddr_len = sizeof(*sin);
478 return 0;
479}
480EXPORT_SYMBOL(inet6_getname);
481
482int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
483{
484 struct sock *sk = sock->sk;
485 struct net *net = sock_net(sk);
486
487 switch (cmd) {
488 case SIOCGSTAMP:
489 return sock_get_timestamp(sk, (struct timeval __user *)arg);
490
491 case SIOCGSTAMPNS:
492 return sock_get_timestampns(sk, (struct timespec __user *)arg);
493
494 case SIOCADDRT:
495 case SIOCDELRT:
496
497 return ipv6_route_ioctl(net, cmd, (void __user *)arg);
498
499 case SIOCSIFADDR:
500 return addrconf_add_ifaddr(net, (void __user *) arg);
501 case SIOCDIFADDR:
502 return addrconf_del_ifaddr(net, (void __user *) arg);
503 case SIOCSIFDSTADDR:
504 return addrconf_set_dstaddr(net, (void __user *) arg);
505 default:
506 if (!sk->sk_prot->ioctl)
507 return -ENOIOCTLCMD;
508 return sk->sk_prot->ioctl(sk, cmd, arg);
509 }
510
511 return 0;
512}
513EXPORT_SYMBOL(inet6_ioctl);
514
515const struct proto_ops inet6_stream_ops = {
516 .family = PF_INET6,
517 .owner = THIS_MODULE,
518 .release = inet6_release,
519 .bind = inet6_bind,
520 .connect = inet_stream_connect,
521 .socketpair = sock_no_socketpair,
522 .accept = inet_accept,
523 .getname = inet6_getname,
524 .poll = tcp_poll,
525 .ioctl = inet6_ioctl,
526 .listen = inet_listen,
527 .shutdown = inet_shutdown,
528 .setsockopt = sock_common_setsockopt,
529 .getsockopt = sock_common_getsockopt,
530 .sendmsg = inet_sendmsg,
531 .recvmsg = inet_recvmsg,
532 .mmap = sock_no_mmap,
533 .sendpage = inet_sendpage,
534 .splice_read = tcp_splice_read,
535#ifdef CONFIG_COMPAT
536 .compat_setsockopt = compat_sock_common_setsockopt,
537 .compat_getsockopt = compat_sock_common_getsockopt,
538#endif
539};
540
541const struct proto_ops inet6_dgram_ops = {
542 .family = PF_INET6,
543 .owner = THIS_MODULE,
544 .release = inet6_release,
545 .bind = inet6_bind,
546 .connect = inet_dgram_connect,
547 .socketpair = sock_no_socketpair,
548 .accept = sock_no_accept,
549 .getname = inet6_getname,
550 .poll = udp_poll,
551 .ioctl = inet6_ioctl,
552 .listen = sock_no_listen,
553 .shutdown = inet_shutdown,
554 .setsockopt = sock_common_setsockopt,
555 .getsockopt = sock_common_getsockopt,
556 .sendmsg = inet_sendmsg,
557 .recvmsg = inet_recvmsg,
558 .mmap = sock_no_mmap,
559 .sendpage = sock_no_sendpage,
560#ifdef CONFIG_COMPAT
561 .compat_setsockopt = compat_sock_common_setsockopt,
562 .compat_getsockopt = compat_sock_common_getsockopt,
563#endif
564};
565
566static const struct net_proto_family inet6_family_ops = {
567 .family = PF_INET6,
568 .create = inet6_create,
569 .owner = THIS_MODULE,
570};
571
572int inet6_register_protosw(struct inet_protosw *p)
573{
574 struct list_head *lh;
575 struct inet_protosw *answer;
576 struct list_head *last_perm;
577 int protocol = p->protocol;
578 int ret;
579
580 spin_lock_bh(&inetsw6_lock);
581
582 ret = -EINVAL;
583 if (p->type >= SOCK_MAX)
584 goto out_illegal;
585
586
587 answer = NULL;
588 ret = -EPERM;
589 last_perm = &inetsw6[p->type];
590 list_for_each(lh, &inetsw6[p->type]) {
591 answer = list_entry(lh, struct inet_protosw, list);
592
593
594 if (INET_PROTOSW_PERMANENT & answer->flags) {
595 if (protocol == answer->protocol)
596 break;
597 last_perm = lh;
598 }
599
600 answer = NULL;
601 }
602 if (answer)
603 goto out_permanent;
604
605
606
607
608
609
610
611 list_add_rcu(&p->list, last_perm);
612 ret = 0;
613out:
614 spin_unlock_bh(&inetsw6_lock);
615 return ret;
616
617out_permanent:
618 pr_err("Attempt to override permanent protocol %d\n", protocol);
619 goto out;
620
621out_illegal:
622 pr_err("Ignoring attempt to register invalid socket type %d\n",
623 p->type);
624 goto out;
625}
626EXPORT_SYMBOL(inet6_register_protosw);
627
628void
629inet6_unregister_protosw(struct inet_protosw *p)
630{
631 if (INET_PROTOSW_PERMANENT & p->flags) {
632 pr_err("Attempt to unregister permanent protocol %d\n",
633 p->protocol);
634 } else {
635 spin_lock_bh(&inetsw6_lock);
636 list_del_rcu(&p->list);
637 spin_unlock_bh(&inetsw6_lock);
638
639 synchronize_net();
640 }
641}
642EXPORT_SYMBOL(inet6_unregister_protosw);
643
644int inet6_sk_rebuild_header(struct sock *sk)
645{
646 struct ipv6_pinfo *np = inet6_sk(sk);
647 struct dst_entry *dst;
648
649 dst = __sk_dst_check(sk, np->dst_cookie);
650
651 if (dst == NULL) {
652 struct inet_sock *inet = inet_sk(sk);
653 struct in6_addr *final_p, final;
654 struct flowi6 fl6;
655
656 memset(&fl6, 0, sizeof(fl6));
657 fl6.flowi6_proto = sk->sk_protocol;
658 fl6.daddr = np->daddr;
659 fl6.saddr = np->saddr;
660 fl6.flowlabel = np->flow_label;
661 fl6.flowi6_oif = sk->sk_bound_dev_if;
662 fl6.flowi6_mark = sk->sk_mark;
663 fl6.fl6_dport = inet->inet_dport;
664 fl6.fl6_sport = inet->inet_sport;
665 security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
666
667 final_p = fl6_update_dst(&fl6, np->opt, &final);
668
669 dst = ip6_dst_lookup_flow(sk, &fl6, final_p, false);
670 if (IS_ERR(dst)) {
671 sk->sk_route_caps = 0;
672 sk->sk_err_soft = -PTR_ERR(dst);
673 return PTR_ERR(dst);
674 }
675
676 __ip6_dst_store(sk, dst, NULL, NULL);
677 }
678
679 return 0;
680}
681EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
682
683bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb)
684{
685 const struct ipv6_pinfo *np = inet6_sk(sk);
686 const struct inet6_skb_parm *opt = IP6CB(skb);
687
688 if (np->rxopt.all) {
689 if ((opt->hop && (np->rxopt.bits.hopopts ||
690 np->rxopt.bits.ohopopts)) ||
691 ((IPV6_FLOWINFO_MASK &
692 *(__be32 *)skb_network_header(skb)) &&
693 np->rxopt.bits.rxflow) ||
694 (opt->srcrt && (np->rxopt.bits.srcrt ||
695 np->rxopt.bits.osrcrt)) ||
696 ((opt->dst1 || opt->dst0) &&
697 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
698 return true;
699 }
700 return false;
701}
702EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
703
704static struct packet_type ipv6_packet_type __read_mostly = {
705 .type = cpu_to_be16(ETH_P_IPV6),
706 .func = ipv6_rcv,
707};
708
709static int __init ipv6_packet_init(void)
710{
711 dev_add_pack(&ipv6_packet_type);
712 return 0;
713}
714
715static void ipv6_packet_cleanup(void)
716{
717 dev_remove_pack(&ipv6_packet_type);
718}
719
720static int __net_init ipv6_init_mibs(struct net *net)
721{
722 if (snmp_mib_init((void __percpu **)net->mib.udp_stats_in6,
723 sizeof(struct udp_mib),
724 __alignof__(struct udp_mib)) < 0)
725 return -ENOMEM;
726 if (snmp_mib_init((void __percpu **)net->mib.udplite_stats_in6,
727 sizeof(struct udp_mib),
728 __alignof__(struct udp_mib)) < 0)
729 goto err_udplite_mib;
730 if (snmp_mib_init((void __percpu **)net->mib.ipv6_statistics,
731 sizeof(struct ipstats_mib),
732 __alignof__(struct ipstats_mib)) < 0)
733 goto err_ip_mib;
734 if (snmp_mib_init((void __percpu **)net->mib.icmpv6_statistics,
735 sizeof(struct icmpv6_mib),
736 __alignof__(struct icmpv6_mib)) < 0)
737 goto err_icmp_mib;
738 net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib),
739 GFP_KERNEL);
740 if (!net->mib.icmpv6msg_statistics)
741 goto err_icmpmsg_mib;
742 return 0;
743
744err_icmpmsg_mib:
745 snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics);
746err_icmp_mib:
747 snmp_mib_free((void __percpu **)net->mib.ipv6_statistics);
748err_ip_mib:
749 snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6);
750err_udplite_mib:
751 snmp_mib_free((void __percpu **)net->mib.udp_stats_in6);
752 return -ENOMEM;
753}
754
755static void ipv6_cleanup_mibs(struct net *net)
756{
757 snmp_mib_free((void __percpu **)net->mib.udp_stats_in6);
758 snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6);
759 snmp_mib_free((void __percpu **)net->mib.ipv6_statistics);
760 snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics);
761 kfree(net->mib.icmpv6msg_statistics);
762}
763
764static int __net_init inet6_net_init(struct net *net)
765{
766 int err = 0;
767
768 net->ipv6.sysctl.bindv6only = 0;
769 net->ipv6.sysctl.icmpv6_time = 1*HZ;
770 atomic_set(&net->ipv6.rt_genid, 0);
771
772 err = ipv6_init_mibs(net);
773 if (err)
774 return err;
775#ifdef CONFIG_PROC_FS
776 err = udp6_proc_init(net);
777 if (err)
778 goto out;
779 err = tcp6_proc_init(net);
780 if (err)
781 goto proc_tcp6_fail;
782 err = ac6_proc_init(net);
783 if (err)
784 goto proc_ac6_fail;
785#endif
786 return err;
787
788#ifdef CONFIG_PROC_FS
789proc_ac6_fail:
790 tcp6_proc_exit(net);
791proc_tcp6_fail:
792 udp6_proc_exit(net);
793out:
794 ipv6_cleanup_mibs(net);
795 return err;
796#endif
797}
798
799static void __net_exit inet6_net_exit(struct net *net)
800{
801#ifdef CONFIG_PROC_FS
802 udp6_proc_exit(net);
803 tcp6_proc_exit(net);
804 ac6_proc_exit(net);
805#endif
806 ipv6_cleanup_mibs(net);
807}
808
809static struct pernet_operations inet6_net_ops = {
810 .init = inet6_net_init,
811 .exit = inet6_net_exit,
812};
813
814static const struct ipv6_stub ipv6_stub_impl = {
815 .ipv6_sock_mc_join = ipv6_sock_mc_join,
816 .ipv6_sock_mc_drop = ipv6_sock_mc_drop,
817 .ipv6_dst_lookup = ip6_dst_lookup,
818 .udpv6_encap_enable = udpv6_encap_enable,
819 .ndisc_send_na = ndisc_send_na,
820 .nd_tbl = &nd_tbl,
821};
822
823static int __init inet6_init(void)
824{
825 struct list_head *r;
826 int err = 0;
827
828 BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > FIELD_SIZEOF(struct sk_buff, cb));
829
830
831 for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
832 INIT_LIST_HEAD(r);
833
834 if (disable_ipv6_mod) {
835 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
836 goto out;
837 }
838
839 err = proto_register(&tcpv6_prot, 1);
840 if (err)
841 goto out;
842
843 err = proto_register(&udpv6_prot, 1);
844 if (err)
845 goto out_unregister_tcp_proto;
846
847 err = proto_register(&udplitev6_prot, 1);
848 if (err)
849 goto out_unregister_udp_proto;
850
851 err = proto_register(&rawv6_prot, 1);
852 if (err)
853 goto out_unregister_udplite_proto;
854
855 err = proto_register(&pingv6_prot, 1);
856 if (err)
857 goto out_unregister_ping_proto;
858
859
860
861
862 err = rawv6_init();
863 if (err)
864 goto out_unregister_raw_proto;
865
866
867
868
869 err = sock_register(&inet6_family_ops);
870 if (err)
871 goto out_sock_register_fail;
872
873 tcpv6_prot.sysctl_mem = init_net.ipv4.sysctl_tcp_mem;
874
875
876
877
878
879
880
881
882 err = register_pernet_subsys(&inet6_net_ops);
883 if (err)
884 goto register_pernet_fail;
885 err = icmpv6_init();
886 if (err)
887 goto icmp_fail;
888 err = ip6_mr_init();
889 if (err)
890 goto ipmr_fail;
891 err = ndisc_init();
892 if (err)
893 goto ndisc_fail;
894 err = igmp6_init();
895 if (err)
896 goto igmp_fail;
897
898 ipv6_stub = &ipv6_stub_impl;
899
900 err = ipv6_netfilter_init();
901 if (err)
902 goto netfilter_fail;
903
904#ifdef CONFIG_PROC_FS
905 err = -ENOMEM;
906 if (raw6_proc_init())
907 goto proc_raw6_fail;
908 if (udplite6_proc_init())
909 goto proc_udplite6_fail;
910 if (ipv6_misc_proc_init())
911 goto proc_misc6_fail;
912 if (if6_proc_init())
913 goto proc_if6_fail;
914#endif
915 err = ip6_route_init();
916 if (err)
917 goto ip6_route_fail;
918 err = ndisc_late_init();
919 if (err)
920 goto ndisc_late_fail;
921 err = ip6_flowlabel_init();
922 if (err)
923 goto ip6_flowlabel_fail;
924 err = addrconf_init();
925 if (err)
926 goto addrconf_fail;
927
928
929 err = ipv6_exthdrs_init();
930 if (err)
931 goto ipv6_exthdrs_fail;
932
933 err = ipv6_frag_init();
934 if (err)
935 goto ipv6_frag_fail;
936
937
938 err = udpv6_init();
939 if (err)
940 goto udpv6_fail;
941
942 err = udplitev6_init();
943 if (err)
944 goto udplitev6_fail;
945
946 err = tcpv6_init();
947 if (err)
948 goto tcpv6_fail;
949
950 err = ipv6_packet_init();
951 if (err)
952 goto ipv6_packet_fail;
953
954 err = pingv6_init();
955 if (err)
956 goto pingv6_fail;
957
958#ifdef CONFIG_SYSCTL
959 err = ipv6_sysctl_register();
960 if (err)
961 goto sysctl_fail;
962#endif
963out:
964 return err;
965
966#ifdef CONFIG_SYSCTL
967sysctl_fail:
968 ipv6_packet_cleanup();
969#endif
970pingv6_fail:
971 pingv6_exit();
972ipv6_packet_fail:
973 tcpv6_exit();
974tcpv6_fail:
975 udplitev6_exit();
976udplitev6_fail:
977 udpv6_exit();
978udpv6_fail:
979 ipv6_frag_exit();
980ipv6_frag_fail:
981 ipv6_exthdrs_exit();
982ipv6_exthdrs_fail:
983 addrconf_cleanup();
984addrconf_fail:
985 ip6_flowlabel_cleanup();
986ip6_flowlabel_fail:
987 ndisc_late_cleanup();
988ndisc_late_fail:
989 ip6_route_cleanup();
990ip6_route_fail:
991#ifdef CONFIG_PROC_FS
992 if6_proc_exit();
993proc_if6_fail:
994 ipv6_misc_proc_exit();
995proc_misc6_fail:
996 udplite6_proc_exit();
997proc_udplite6_fail:
998 raw6_proc_exit();
999proc_raw6_fail:
1000#endif
1001 ipv6_netfilter_fini();
1002netfilter_fail:
1003 igmp6_cleanup();
1004igmp_fail:
1005 ndisc_cleanup();
1006ndisc_fail:
1007 ip6_mr_cleanup();
1008ipmr_fail:
1009 icmpv6_cleanup();
1010icmp_fail:
1011 unregister_pernet_subsys(&inet6_net_ops);
1012register_pernet_fail:
1013 sock_unregister(PF_INET6);
1014 rtnl_unregister_all(PF_INET6);
1015out_sock_register_fail:
1016 rawv6_exit();
1017out_unregister_ping_proto:
1018 proto_unregister(&pingv6_prot);
1019out_unregister_raw_proto:
1020 proto_unregister(&rawv6_prot);
1021out_unregister_udplite_proto:
1022 proto_unregister(&udplitev6_prot);
1023out_unregister_udp_proto:
1024 proto_unregister(&udpv6_prot);
1025out_unregister_tcp_proto:
1026 proto_unregister(&tcpv6_prot);
1027 goto out;
1028}
1029module_init(inet6_init);
1030
1031static void __exit inet6_exit(void)
1032{
1033 if (disable_ipv6_mod)
1034 return;
1035
1036
1037 sock_unregister(PF_INET6);
1038
1039 rtnl_unregister_all(PF_INET6);
1040
1041 udpv6_exit();
1042 udplitev6_exit();
1043 tcpv6_exit();
1044
1045
1046 ipv6_packet_cleanup();
1047 ipv6_frag_exit();
1048 ipv6_exthdrs_exit();
1049 addrconf_cleanup();
1050 ip6_flowlabel_cleanup();
1051 ndisc_late_cleanup();
1052 ip6_route_cleanup();
1053#ifdef CONFIG_PROC_FS
1054
1055
1056 if6_proc_exit();
1057 ipv6_misc_proc_exit();
1058 udplite6_proc_exit();
1059 raw6_proc_exit();
1060#endif
1061 ipv6_netfilter_fini();
1062 ipv6_stub = NULL;
1063 igmp6_cleanup();
1064 ndisc_cleanup();
1065 ip6_mr_cleanup();
1066 icmpv6_cleanup();
1067 rawv6_exit();
1068
1069 unregister_pernet_subsys(&inet6_net_ops);
1070 proto_unregister(&rawv6_prot);
1071 proto_unregister(&udplitev6_prot);
1072 proto_unregister(&udpv6_prot);
1073 proto_unregister(&tcpv6_prot);
1074
1075 rcu_barrier();
1076}
1077module_exit(inet6_exit);
1078
1079MODULE_ALIAS_NETPROTO(PF_INET6);
1080
