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20
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#include <net/calipso.h>
64#include <net/seg6.h>
65
66#include <linux/uaccess.h>
67#include <linux/mroute6.h>
68
69#include "ip6_offload.h"
70
71MODULE_AUTHOR("Cast of dozens");
72MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
73MODULE_LICENSE("GPL");
74
75
76
77
78static struct list_head inetsw6[SOCK_MAX];
79static DEFINE_SPINLOCK(inetsw6_lock);
80
81struct ipv6_params ipv6_defaults = {
82 .disable_ipv6 = 0,
83 .autoconf = 1,
84};
85
86static int disable_ipv6_mod;
87
88module_param_named(disable, disable_ipv6_mod, int, 0444);
89MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional");
90
91module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444);
92MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces");
93
94module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444);
95MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces");
96
97bool ipv6_mod_enabled(void)
98{
99 return disable_ipv6_mod == 0;
100}
101EXPORT_SYMBOL_GPL(ipv6_mod_enabled);
102
103static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
104{
105 const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
106
107 return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
108}
109
110static int inet6_create(struct net *net, struct socket *sock, int protocol,
111 int kern)
112{
113 struct inet_sock *inet;
114 struct ipv6_pinfo *np;
115 struct sock *sk;
116 struct inet_protosw *answer;
117 struct proto *answer_prot;
118 unsigned char answer_flags;
119 int try_loading_module = 0;
120 int err;
121
122 if (protocol < 0 || protocol >= IPPROTO_MAX)
123 return -EINVAL;
124
125
126lookup_protocol:
127 err = -ESOCKTNOSUPPORT;
128 rcu_read_lock();
129 list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
130
131 err = 0;
132
133 if (protocol == answer->protocol) {
134 if (protocol != IPPROTO_IP)
135 break;
136 } else {
137
138 if (IPPROTO_IP == protocol) {
139 protocol = answer->protocol;
140 break;
141 }
142 if (IPPROTO_IP == answer->protocol)
143 break;
144 }
145 err = -EPROTONOSUPPORT;
146 }
147
148 if (err) {
149 if (try_loading_module < 2) {
150 rcu_read_unlock();
151
152
153
154
155 if (++try_loading_module == 1)
156 request_module("net-pf-%d-proto-%d-type-%d",
157 PF_INET6, protocol, sock->type);
158
159
160
161
162 else
163 request_module("net-pf-%d-proto-%d",
164 PF_INET6, protocol);
165 goto lookup_protocol;
166 } else
167 goto out_rcu_unlock;
168 }
169
170 err = -EPERM;
171 if (sock->type == SOCK_RAW && !kern &&
172 !ns_capable(net->user_ns, CAP_NET_RAW))
173 goto out_rcu_unlock;
174
175 sock->ops = answer->ops;
176 answer_prot = answer->prot;
177 answer_flags = answer->flags;
178 rcu_read_unlock();
179
180 WARN_ON(!answer_prot->slab);
181
182 err = -ENOBUFS;
183 sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot, kern);
184 if (!sk)
185 goto out;
186
187 sock_init_data(sock, sk);
188
189 err = 0;
190 if (INET_PROTOSW_REUSE & answer_flags)
191 sk->sk_reuse = SK_CAN_REUSE;
192
193 inet = inet_sk(sk);
194 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
195
196 if (SOCK_RAW == sock->type) {
197 inet->inet_num = protocol;
198 if (IPPROTO_RAW == protocol)
199 inet->hdrincl = 1;
200 }
201
202 sk->sk_destruct = inet_sock_destruct;
203 sk->sk_family = PF_INET6;
204 sk->sk_protocol = protocol;
205
206 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
207
208 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
209 np->hop_limit = -1;
210 np->mcast_hops = IPV6_DEFAULT_MCASTHOPS;
211 np->mc_loop = 1;
212 np->pmtudisc = IPV6_PMTUDISC_WANT;
213 np->repflow = net->ipv6.sysctl.flowlabel_reflect;
214 sk->sk_ipv6only = net->ipv6.sysctl.bindv6only;
215
216
217
218
219 inet->uc_ttl = -1;
220
221 inet->mc_loop = 1;
222 inet->mc_ttl = 1;
223 inet->mc_index = 0;
224 inet->mc_list = NULL;
225 inet->rcv_tos = 0;
226
227 if (net->ipv4.sysctl_ip_no_pmtu_disc)
228 inet->pmtudisc = IP_PMTUDISC_DONT;
229 else
230 inet->pmtudisc = IP_PMTUDISC_WANT;
231
232
233
234
235
236
237
238
239
240 sk_refcnt_debug_inc(sk);
241
242 if (inet->inet_num) {
243
244
245
246
247 inet->inet_sport = htons(inet->inet_num);
248 err = sk->sk_prot->hash(sk);
249 if (err) {
250 sk_common_release(sk);
251 goto out;
252 }
253 }
254 if (sk->sk_prot->init) {
255 err = sk->sk_prot->init(sk);
256 if (err) {
257 sk_common_release(sk);
258 goto out;
259 }
260 }
261
262 if (!kern) {
263 err = BPF_CGROUP_RUN_PROG_INET_SOCK(sk);
264 if (err) {
265 sk_common_release(sk);
266 goto out;
267 }
268 }
269out:
270 return err;
271out_rcu_unlock:
272 rcu_read_unlock();
273 goto out;
274}
275
276
277
278int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
279{
280 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr;
281 struct sock *sk = sock->sk;
282 struct inet_sock *inet = inet_sk(sk);
283 struct ipv6_pinfo *np = inet6_sk(sk);
284 struct net *net = sock_net(sk);
285 __be32 v4addr = 0;
286 unsigned short snum;
287 int addr_type = 0;
288 int err = 0;
289
290
291 if (sk->sk_prot->bind)
292 return sk->sk_prot->bind(sk, uaddr, addr_len);
293
294 if (addr_len < SIN6_LEN_RFC2133)
295 return -EINVAL;
296
297 if (addr->sin6_family != AF_INET6)
298 return -EAFNOSUPPORT;
299
300 addr_type = ipv6_addr_type(&addr->sin6_addr);
301 if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM)
302 return -EINVAL;
303
304 snum = ntohs(addr->sin6_port);
305 if (snum && snum < inet_prot_sock(net) &&
306 !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
307 return -EACCES;
308
309 lock_sock(sk);
310
311
312 if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
313 err = -EINVAL;
314 goto out;
315 }
316
317
318 if (addr_type == IPV6_ADDR_MAPPED) {
319 int chk_addr_ret;
320
321
322
323
324 if (sk->sk_ipv6only) {
325 err = -EINVAL;
326 goto out;
327 }
328
329
330 v4addr = addr->sin6_addr.s6_addr32[3];
331 chk_addr_ret = inet_addr_type(net, v4addr);
332 if (!net->ipv4.sysctl_ip_nonlocal_bind &&
333 !(inet->freebind || inet->transparent) &&
334 v4addr != htonl(INADDR_ANY) &&
335 chk_addr_ret != RTN_LOCAL &&
336 chk_addr_ret != RTN_MULTICAST &&
337 chk_addr_ret != RTN_BROADCAST) {
338 err = -EADDRNOTAVAIL;
339 goto out;
340 }
341 } else {
342 if (addr_type != IPV6_ADDR_ANY) {
343 struct net_device *dev = NULL;
344
345 rcu_read_lock();
346 if (__ipv6_addr_needs_scope_id(addr_type)) {
347 if (addr_len >= sizeof(struct sockaddr_in6) &&
348 addr->sin6_scope_id) {
349
350
351
352 sk->sk_bound_dev_if = addr->sin6_scope_id;
353 }
354
355
356 if (!sk->sk_bound_dev_if) {
357 err = -EINVAL;
358 goto out_unlock;
359 }
360 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
361 if (!dev) {
362 err = -ENODEV;
363 goto out_unlock;
364 }
365 }
366
367
368
369
370 v4addr = LOOPBACK4_IPV6;
371 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
372 if (!net->ipv6.sysctl.ip_nonlocal_bind &&
373 !(inet->freebind || inet->transparent) &&
374 !ipv6_chk_addr(net, &addr->sin6_addr,
375 dev, 0)) {
376 err = -EADDRNOTAVAIL;
377 goto out_unlock;
378 }
379 }
380 rcu_read_unlock();
381 }
382 }
383
384 inet->inet_rcv_saddr = v4addr;
385 inet->inet_saddr = v4addr;
386
387 sk->sk_v6_rcv_saddr = addr->sin6_addr;
388
389 if (!(addr_type & IPV6_ADDR_MULTICAST))
390 np->saddr = addr->sin6_addr;
391
392
393 if ((snum || !inet->bind_address_no_port) &&
394 sk->sk_prot->get_port(sk, snum)) {
395 inet_reset_saddr(sk);
396 err = -EADDRINUSE;
397 goto out;
398 }
399
400 if (addr_type != IPV6_ADDR_ANY) {
401 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
402 if (addr_type != IPV6_ADDR_MAPPED)
403 sk->sk_ipv6only = 1;
404 }
405 if (snum)
406 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
407 inet->inet_sport = htons(inet->inet_num);
408 inet->inet_dport = 0;
409 inet->inet_daddr = 0;
410out:
411 release_sock(sk);
412 return err;
413out_unlock:
414 rcu_read_unlock();
415 goto out;
416}
417EXPORT_SYMBOL(inet6_bind);
418
419int inet6_release(struct socket *sock)
420{
421 struct sock *sk = sock->sk;
422
423 if (!sk)
424 return -EINVAL;
425
426
427 ipv6_sock_mc_close(sk);
428
429
430 ipv6_sock_ac_close(sk);
431
432 return inet_release(sock);
433}
434EXPORT_SYMBOL(inet6_release);
435
436void inet6_destroy_sock(struct sock *sk)
437{
438 struct ipv6_pinfo *np = inet6_sk(sk);
439 struct sk_buff *skb;
440 struct ipv6_txoptions *opt;
441
442
443
444 skb = xchg(&np->pktoptions, NULL);
445 if (skb)
446 kfree_skb(skb);
447
448 skb = xchg(&np->rxpmtu, NULL);
449 if (skb)
450 kfree_skb(skb);
451
452
453 fl6_free_socklist(sk);
454
455
456
457 opt = xchg((__force struct ipv6_txoptions **)&np->opt, NULL);
458 if (opt) {
459 atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
460 txopt_put(opt);
461 }
462}
463EXPORT_SYMBOL_GPL(inet6_destroy_sock);
464
465
466
467
468
469int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
470 int *uaddr_len, int peer)
471{
472 struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
473 struct sock *sk = sock->sk;
474 struct inet_sock *inet = inet_sk(sk);
475 struct ipv6_pinfo *np = inet6_sk(sk);
476
477 sin->sin6_family = AF_INET6;
478 sin->sin6_flowinfo = 0;
479 sin->sin6_scope_id = 0;
480 if (peer) {
481 if (!inet->inet_dport)
482 return -ENOTCONN;
483 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
484 peer == 1)
485 return -ENOTCONN;
486 sin->sin6_port = inet->inet_dport;
487 sin->sin6_addr = sk->sk_v6_daddr;
488 if (np->sndflow)
489 sin->sin6_flowinfo = np->flow_label;
490 } else {
491 if (ipv6_addr_any(&sk->sk_v6_rcv_saddr))
492 sin->sin6_addr = np->saddr;
493 else
494 sin->sin6_addr = sk->sk_v6_rcv_saddr;
495
496 sin->sin6_port = inet->inet_sport;
497 }
498 sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
499 sk->sk_bound_dev_if);
500 *uaddr_len = sizeof(*sin);
501 return 0;
502}
503EXPORT_SYMBOL(inet6_getname);
504
505int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
506{
507 struct sock *sk = sock->sk;
508 struct net *net = sock_net(sk);
509
510 switch (cmd) {
511 case SIOCGSTAMP:
512 return sock_get_timestamp(sk, (struct timeval __user *)arg);
513
514 case SIOCGSTAMPNS:
515 return sock_get_timestampns(sk, (struct timespec __user *)arg);
516
517 case SIOCADDRT:
518 case SIOCDELRT:
519
520 return ipv6_route_ioctl(net, cmd, (void __user *)arg);
521
522 case SIOCSIFADDR:
523 return addrconf_add_ifaddr(net, (void __user *) arg);
524 case SIOCDIFADDR:
525 return addrconf_del_ifaddr(net, (void __user *) arg);
526 case SIOCSIFDSTADDR:
527 return addrconf_set_dstaddr(net, (void __user *) arg);
528 default:
529 if (!sk->sk_prot->ioctl)
530 return -ENOIOCTLCMD;
531 return sk->sk_prot->ioctl(sk, cmd, arg);
532 }
533
534 return 0;
535}
536EXPORT_SYMBOL(inet6_ioctl);
537
538const struct proto_ops inet6_stream_ops = {
539 .family = PF_INET6,
540 .owner = THIS_MODULE,
541 .release = inet6_release,
542 .bind = inet6_bind,
543 .connect = inet_stream_connect,
544 .socketpair = sock_no_socketpair,
545 .accept = inet_accept,
546 .getname = inet6_getname,
547 .poll = tcp_poll,
548 .ioctl = inet6_ioctl,
549 .listen = inet_listen,
550 .shutdown = inet_shutdown,
551 .setsockopt = sock_common_setsockopt,
552 .getsockopt = sock_common_getsockopt,
553 .sendmsg = inet_sendmsg,
554 .recvmsg = inet_recvmsg,
555 .mmap = sock_no_mmap,
556 .sendpage = inet_sendpage,
557 .sendmsg_locked = tcp_sendmsg_locked,
558 .sendpage_locked = tcp_sendpage_locked,
559 .splice_read = tcp_splice_read,
560 .read_sock = tcp_read_sock,
561 .peek_len = tcp_peek_len,
562#ifdef CONFIG_COMPAT
563 .compat_setsockopt = compat_sock_common_setsockopt,
564 .compat_getsockopt = compat_sock_common_getsockopt,
565#endif
566};
567
568const struct proto_ops inet6_dgram_ops = {
569 .family = PF_INET6,
570 .owner = THIS_MODULE,
571 .release = inet6_release,
572 .bind = inet6_bind,
573 .connect = inet_dgram_connect,
574 .socketpair = sock_no_socketpair,
575 .accept = sock_no_accept,
576 .getname = inet6_getname,
577 .poll = udp_poll,
578 .ioctl = inet6_ioctl,
579 .listen = sock_no_listen,
580 .shutdown = inet_shutdown,
581 .setsockopt = sock_common_setsockopt,
582 .getsockopt = sock_common_getsockopt,
583 .sendmsg = inet_sendmsg,
584 .recvmsg = inet_recvmsg,
585 .mmap = sock_no_mmap,
586 .sendpage = sock_no_sendpage,
587 .set_peek_off = sk_set_peek_off,
588#ifdef CONFIG_COMPAT
589 .compat_setsockopt = compat_sock_common_setsockopt,
590 .compat_getsockopt = compat_sock_common_getsockopt,
591#endif
592};
593
594static const struct net_proto_family inet6_family_ops = {
595 .family = PF_INET6,
596 .create = inet6_create,
597 .owner = THIS_MODULE,
598};
599
600int inet6_register_protosw(struct inet_protosw *p)
601{
602 struct list_head *lh;
603 struct inet_protosw *answer;
604 struct list_head *last_perm;
605 int protocol = p->protocol;
606 int ret;
607
608 spin_lock_bh(&inetsw6_lock);
609
610 ret = -EINVAL;
611 if (p->type >= SOCK_MAX)
612 goto out_illegal;
613
614
615 answer = NULL;
616 ret = -EPERM;
617 last_perm = &inetsw6[p->type];
618 list_for_each(lh, &inetsw6[p->type]) {
619 answer = list_entry(lh, struct inet_protosw, list);
620
621
622 if (INET_PROTOSW_PERMANENT & answer->flags) {
623 if (protocol == answer->protocol)
624 break;
625 last_perm = lh;
626 }
627
628 answer = NULL;
629 }
630 if (answer)
631 goto out_permanent;
632
633
634
635
636
637
638
639 list_add_rcu(&p->list, last_perm);
640 ret = 0;
641out:
642 spin_unlock_bh(&inetsw6_lock);
643 return ret;
644
645out_permanent:
646 pr_err("Attempt to override permanent protocol %d\n", protocol);
647 goto out;
648
649out_illegal:
650 pr_err("Ignoring attempt to register invalid socket type %d\n",
651 p->type);
652 goto out;
653}
654EXPORT_SYMBOL(inet6_register_protosw);
655
656void
657inet6_unregister_protosw(struct inet_protosw *p)
658{
659 if (INET_PROTOSW_PERMANENT & p->flags) {
660 pr_err("Attempt to unregister permanent protocol %d\n",
661 p->protocol);
662 } else {
663 spin_lock_bh(&inetsw6_lock);
664 list_del_rcu(&p->list);
665 spin_unlock_bh(&inetsw6_lock);
666
667 synchronize_net();
668 }
669}
670EXPORT_SYMBOL(inet6_unregister_protosw);
671
672int inet6_sk_rebuild_header(struct sock *sk)
673{
674 struct ipv6_pinfo *np = inet6_sk(sk);
675 struct dst_entry *dst;
676
677 dst = __sk_dst_check(sk, np->dst_cookie);
678
679 if (!dst) {
680 struct inet_sock *inet = inet_sk(sk);
681 struct in6_addr *final_p, final;
682 struct flowi6 fl6;
683
684 memset(&fl6, 0, sizeof(fl6));
685 fl6.flowi6_proto = sk->sk_protocol;
686 fl6.daddr = sk->sk_v6_daddr;
687 fl6.saddr = np->saddr;
688 fl6.flowlabel = np->flow_label;
689 fl6.flowi6_oif = sk->sk_bound_dev_if;
690 fl6.flowi6_mark = sk->sk_mark;
691 fl6.fl6_dport = inet->inet_dport;
692 fl6.fl6_sport = inet->inet_sport;
693 fl6.flowi6_uid = sk->sk_uid;
694 security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
695
696 rcu_read_lock();
697 final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt),
698 &final);
699 rcu_read_unlock();
700
701 dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
702 if (IS_ERR(dst)) {
703 sk->sk_route_caps = 0;
704 sk->sk_err_soft = -PTR_ERR(dst);
705 return PTR_ERR(dst);
706 }
707
708 ip6_dst_store(sk, dst, NULL, NULL);
709 }
710
711 return 0;
712}
713EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
714
715bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb,
716 const struct inet6_skb_parm *opt)
717{
718 const struct ipv6_pinfo *np = inet6_sk(sk);
719
720 if (np->rxopt.all) {
721 if (((opt->flags & IP6SKB_HOPBYHOP) &&
722 (np->rxopt.bits.hopopts || np->rxopt.bits.ohopopts)) ||
723 (ip6_flowinfo((struct ipv6hdr *) skb_network_header(skb)) &&
724 np->rxopt.bits.rxflow) ||
725 (opt->srcrt && (np->rxopt.bits.srcrt ||
726 np->rxopt.bits.osrcrt)) ||
727 ((opt->dst1 || opt->dst0) &&
728 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
729 return true;
730 }
731 return false;
732}
733EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
734
735static struct packet_type ipv6_packet_type __read_mostly = {
736 .type = cpu_to_be16(ETH_P_IPV6),
737 .func = ipv6_rcv,
738};
739
740static int __init ipv6_packet_init(void)
741{
742 dev_add_pack(&ipv6_packet_type);
743 return 0;
744}
745
746static void ipv6_packet_cleanup(void)
747{
748 dev_remove_pack(&ipv6_packet_type);
749}
750
751static int __net_init ipv6_init_mibs(struct net *net)
752{
753 int i;
754
755 net->mib.udp_stats_in6 = alloc_percpu(struct udp_mib);
756 if (!net->mib.udp_stats_in6)
757 return -ENOMEM;
758 net->mib.udplite_stats_in6 = alloc_percpu(struct udp_mib);
759 if (!net->mib.udplite_stats_in6)
760 goto err_udplite_mib;
761 net->mib.ipv6_statistics = alloc_percpu(struct ipstats_mib);
762 if (!net->mib.ipv6_statistics)
763 goto err_ip_mib;
764
765 for_each_possible_cpu(i) {
766 struct ipstats_mib *af_inet6_stats;
767 af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics, i);
768 u64_stats_init(&af_inet6_stats->syncp);
769 }
770
771
772 net->mib.icmpv6_statistics = alloc_percpu(struct icmpv6_mib);
773 if (!net->mib.icmpv6_statistics)
774 goto err_icmp_mib;
775 net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib),
776 GFP_KERNEL);
777 if (!net->mib.icmpv6msg_statistics)
778 goto err_icmpmsg_mib;
779 return 0;
780
781err_icmpmsg_mib:
782 free_percpu(net->mib.icmpv6_statistics);
783err_icmp_mib:
784 free_percpu(net->mib.ipv6_statistics);
785err_ip_mib:
786 free_percpu(net->mib.udplite_stats_in6);
787err_udplite_mib:
788 free_percpu(net->mib.udp_stats_in6);
789 return -ENOMEM;
790}
791
792static void ipv6_cleanup_mibs(struct net *net)
793{
794 free_percpu(net->mib.udp_stats_in6);
795 free_percpu(net->mib.udplite_stats_in6);
796 free_percpu(net->mib.ipv6_statistics);
797 free_percpu(net->mib.icmpv6_statistics);
798 kfree(net->mib.icmpv6msg_statistics);
799}
800
801static int __net_init inet6_net_init(struct net *net)
802{
803 int err = 0;
804
805 net->ipv6.sysctl.bindv6only = 0;
806 net->ipv6.sysctl.icmpv6_time = 1*HZ;
807 net->ipv6.sysctl.flowlabel_consistency = 1;
808 net->ipv6.sysctl.auto_flowlabels = IP6_DEFAULT_AUTO_FLOW_LABELS;
809 net->ipv6.sysctl.idgen_retries = 3;
810 net->ipv6.sysctl.idgen_delay = 1 * HZ;
811 net->ipv6.sysctl.flowlabel_state_ranges = 0;
812 net->ipv6.sysctl.max_dst_opts_cnt = IP6_DEFAULT_MAX_DST_OPTS_CNT;
813 net->ipv6.sysctl.max_hbh_opts_cnt = IP6_DEFAULT_MAX_HBH_OPTS_CNT;
814 net->ipv6.sysctl.max_dst_opts_len = IP6_DEFAULT_MAX_DST_OPTS_LEN;
815 net->ipv6.sysctl.max_hbh_opts_len = IP6_DEFAULT_MAX_HBH_OPTS_LEN;
816 atomic_set(&net->ipv6.fib6_sernum, 1);
817
818 err = ipv6_init_mibs(net);
819 if (err)
820 return err;
821#ifdef CONFIG_PROC_FS
822 err = udp6_proc_init(net);
823 if (err)
824 goto out;
825 err = tcp6_proc_init(net);
826 if (err)
827 goto proc_tcp6_fail;
828 err = ac6_proc_init(net);
829 if (err)
830 goto proc_ac6_fail;
831#endif
832 return err;
833
834#ifdef CONFIG_PROC_FS
835proc_ac6_fail:
836 tcp6_proc_exit(net);
837proc_tcp6_fail:
838 udp6_proc_exit(net);
839out:
840 ipv6_cleanup_mibs(net);
841 return err;
842#endif
843}
844
845static void __net_exit inet6_net_exit(struct net *net)
846{
847#ifdef CONFIG_PROC_FS
848 udp6_proc_exit(net);
849 tcp6_proc_exit(net);
850 ac6_proc_exit(net);
851#endif
852 ipv6_cleanup_mibs(net);
853}
854
855static struct pernet_operations inet6_net_ops = {
856 .init = inet6_net_init,
857 .exit = inet6_net_exit,
858};
859
860static const struct ipv6_stub ipv6_stub_impl = {
861 .ipv6_sock_mc_join = ipv6_sock_mc_join,
862 .ipv6_sock_mc_drop = ipv6_sock_mc_drop,
863 .ipv6_dst_lookup = ip6_dst_lookup,
864 .udpv6_encap_enable = udpv6_encap_enable,
865 .ndisc_send_na = ndisc_send_na,
866 .nd_tbl = &nd_tbl,
867};
868
869static int __init inet6_init(void)
870{
871 struct list_head *r;
872 int err = 0;
873
874 sock_skb_cb_check_size(sizeof(struct inet6_skb_parm));
875
876
877 for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
878 INIT_LIST_HEAD(r);
879
880 if (disable_ipv6_mod) {
881 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
882 goto out;
883 }
884
885 err = proto_register(&tcpv6_prot, 1);
886 if (err)
887 goto out;
888
889 err = proto_register(&udpv6_prot, 1);
890 if (err)
891 goto out_unregister_tcp_proto;
892
893 err = proto_register(&udplitev6_prot, 1);
894 if (err)
895 goto out_unregister_udp_proto;
896
897 err = proto_register(&rawv6_prot, 1);
898 if (err)
899 goto out_unregister_udplite_proto;
900
901 err = proto_register(&pingv6_prot, 1);
902 if (err)
903 goto out_unregister_ping_proto;
904
905
906
907
908 err = rawv6_init();
909 if (err)
910 goto out_unregister_raw_proto;
911
912
913
914
915 err = sock_register(&inet6_family_ops);
916 if (err)
917 goto out_sock_register_fail;
918
919
920
921
922
923
924
925
926 err = register_pernet_subsys(&inet6_net_ops);
927 if (err)
928 goto register_pernet_fail;
929 err = ip6_mr_init();
930 if (err)
931 goto ipmr_fail;
932 err = icmpv6_init();
933 if (err)
934 goto icmp_fail;
935 err = ndisc_init();
936 if (err)
937 goto ndisc_fail;
938 err = igmp6_init();
939 if (err)
940 goto igmp_fail;
941
942 err = ipv6_netfilter_init();
943 if (err)
944 goto netfilter_fail;
945
946#ifdef CONFIG_PROC_FS
947 err = -ENOMEM;
948 if (raw6_proc_init())
949 goto proc_raw6_fail;
950 if (udplite6_proc_init())
951 goto proc_udplite6_fail;
952 if (ipv6_misc_proc_init())
953 goto proc_misc6_fail;
954 if (if6_proc_init())
955 goto proc_if6_fail;
956#endif
957 err = ip6_route_init();
958 if (err)
959 goto ip6_route_fail;
960 err = ndisc_late_init();
961 if (err)
962 goto ndisc_late_fail;
963 err = ip6_flowlabel_init();
964 if (err)
965 goto ip6_flowlabel_fail;
966 err = addrconf_init();
967 if (err)
968 goto addrconf_fail;
969
970
971 err = ipv6_exthdrs_init();
972 if (err)
973 goto ipv6_exthdrs_fail;
974
975 err = ipv6_frag_init();
976 if (err)
977 goto ipv6_frag_fail;
978
979
980 err = udpv6_init();
981 if (err)
982 goto udpv6_fail;
983
984 err = udplitev6_init();
985 if (err)
986 goto udplitev6_fail;
987
988 err = udpv6_offload_init();
989 if (err)
990 goto udpv6_offload_fail;
991
992 err = tcpv6_init();
993 if (err)
994 goto tcpv6_fail;
995
996 err = ipv6_packet_init();
997 if (err)
998 goto ipv6_packet_fail;
999
1000 err = pingv6_init();
1001 if (err)
1002 goto pingv6_fail;
1003
1004 err = calipso_init();
1005 if (err)
1006 goto calipso_fail;
1007
1008 err = seg6_init();
1009 if (err)
1010 goto seg6_fail;
1011
1012 err = igmp6_late_init();
1013 if (err)
1014 goto igmp6_late_err;
1015
1016#ifdef CONFIG_SYSCTL
1017 err = ipv6_sysctl_register();
1018 if (err)
1019 goto sysctl_fail;
1020#endif
1021
1022
1023 wmb();
1024 ipv6_stub = &ipv6_stub_impl;
1025out:
1026 return err;
1027
1028#ifdef CONFIG_SYSCTL
1029sysctl_fail:
1030 igmp6_late_cleanup();
1031#endif
1032igmp6_late_err:
1033 seg6_exit();
1034seg6_fail:
1035 calipso_exit();
1036calipso_fail:
1037 pingv6_exit();
1038pingv6_fail:
1039 ipv6_packet_cleanup();
1040ipv6_packet_fail:
1041 tcpv6_exit();
1042tcpv6_fail:
1043 udpv6_offload_exit();
1044udpv6_offload_fail:
1045 udplitev6_exit();
1046udplitev6_fail:
1047 udpv6_exit();
1048udpv6_fail:
1049 ipv6_frag_exit();
1050ipv6_frag_fail:
1051 ipv6_exthdrs_exit();
1052ipv6_exthdrs_fail:
1053 addrconf_cleanup();
1054addrconf_fail:
1055 ip6_flowlabel_cleanup();
1056ip6_flowlabel_fail:
1057 ndisc_late_cleanup();
1058ndisc_late_fail:
1059 ip6_route_cleanup();
1060ip6_route_fail:
1061#ifdef CONFIG_PROC_FS
1062 if6_proc_exit();
1063proc_if6_fail:
1064 ipv6_misc_proc_exit();
1065proc_misc6_fail:
1066 udplite6_proc_exit();
1067proc_udplite6_fail:
1068 raw6_proc_exit();
1069proc_raw6_fail:
1070#endif
1071 ipv6_netfilter_fini();
1072netfilter_fail:
1073 igmp6_cleanup();
1074igmp_fail:
1075 ndisc_cleanup();
1076ndisc_fail:
1077 ip6_mr_cleanup();
1078icmp_fail:
1079 unregister_pernet_subsys(&inet6_net_ops);
1080ipmr_fail:
1081 icmpv6_cleanup();
1082register_pernet_fail:
1083 sock_unregister(PF_INET6);
1084 rtnl_unregister_all(PF_INET6);
1085out_sock_register_fail:
1086 rawv6_exit();
1087out_unregister_ping_proto:
1088 proto_unregister(&pingv6_prot);
1089out_unregister_raw_proto:
1090 proto_unregister(&rawv6_prot);
1091out_unregister_udplite_proto:
1092 proto_unregister(&udplitev6_prot);
1093out_unregister_udp_proto:
1094 proto_unregister(&udpv6_prot);
1095out_unregister_tcp_proto:
1096 proto_unregister(&tcpv6_prot);
1097 goto out;
1098}
1099module_init(inet6_init);
1100
1101MODULE_ALIAS_NETPROTO(PF_INET6);
1102
