bpf: Propagate modified uaddrlen from cgroup sockaddr programs
[platform/kernel/linux-rpi.git] / net / ipv6 / af_inet6.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  *      PF_INET6 socket protocol family
4  *      Linux INET6 implementation
5  *
6  *      Authors:
7  *      Pedro Roque             <roque@di.fc.ul.pt>
8  *
9  *      Adapted from linux/net/ipv4/af_inet.c
10  *
11  *      Fixes:
12  *      piggy, Karl Knutson     :       Socket protocol table
13  *      Hideaki YOSHIFUJI       :       sin6_scope_id support
14  *      Arnaldo Melo            :       check proc_net_create return, cleanups
15  */
16
17 #define pr_fmt(fmt) "IPv6: " fmt
18
19 #include <linux/module.h>
20 #include <linux/capability.h>
21 #include <linux/errno.h>
22 #include <linux/types.h>
23 #include <linux/socket.h>
24 #include <linux/in.h>
25 #include <linux/kernel.h>
26 #include <linux/timer.h>
27 #include <linux/string.h>
28 #include <linux/sockios.h>
29 #include <linux/net.h>
30 #include <linux/fcntl.h>
31 #include <linux/mm.h>
32 #include <linux/interrupt.h>
33 #include <linux/proc_fs.h>
34 #include <linux/stat.h>
35 #include <linux/init.h>
36 #include <linux/slab.h>
37
38 #include <linux/inet.h>
39 #include <linux/netdevice.h>
40 #include <linux/icmpv6.h>
41 #include <linux/netfilter_ipv6.h>
42
43 #include <net/ip.h>
44 #include <net/ipv6.h>
45 #include <net/udp.h>
46 #include <net/udplite.h>
47 #include <net/tcp.h>
48 #include <net/ping.h>
49 #include <net/protocol.h>
50 #include <net/inet_common.h>
51 #include <net/route.h>
52 #include <net/transp_v6.h>
53 #include <net/ip6_route.h>
54 #include <net/addrconf.h>
55 #include <net/ipv6_stubs.h>
56 #include <net/ndisc.h>
57 #ifdef CONFIG_IPV6_TUNNEL
58 #include <net/ip6_tunnel.h>
59 #endif
60 #include <net/calipso.h>
61 #include <net/seg6.h>
62 #include <net/rpl.h>
63 #include <net/compat.h>
64 #include <net/xfrm.h>
65 #include <net/ioam6.h>
66 #include <net/rawv6.h>
67
68 #include <linux/uaccess.h>
69 #include <linux/mroute6.h>
70
71 #include "ip6_offload.h"
72
73 MODULE_AUTHOR("Cast of dozens");
74 MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
75 MODULE_LICENSE("GPL");
76
77 /* The inetsw6 table contains everything that inet6_create needs to
78  * build a new socket.
79  */
80 static struct list_head inetsw6[SOCK_MAX];
81 static DEFINE_SPINLOCK(inetsw6_lock);
82
83 struct ipv6_params ipv6_defaults = {
84         .disable_ipv6 = 0,
85         .autoconf = 1,
86 };
87
88 static int disable_ipv6_mod;
89
90 module_param_named(disable, disable_ipv6_mod, int, 0444);
91 MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional");
92
93 module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444);
94 MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces");
95
96 module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444);
97 MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces");
98
99 bool ipv6_mod_enabled(void)
100 {
101         return disable_ipv6_mod == 0;
102 }
103 EXPORT_SYMBOL_GPL(ipv6_mod_enabled);
104
105 static struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
106 {
107         const int offset = sk->sk_prot->ipv6_pinfo_offset;
108
109         return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
110 }
111
112 void inet6_sock_destruct(struct sock *sk)
113 {
114         inet6_cleanup_sock(sk);
115         inet_sock_destruct(sk);
116 }
117 EXPORT_SYMBOL_GPL(inet6_sock_destruct);
118
119 static int inet6_create(struct net *net, struct socket *sock, int protocol,
120                         int kern)
121 {
122         struct inet_sock *inet;
123         struct ipv6_pinfo *np;
124         struct sock *sk;
125         struct inet_protosw *answer;
126         struct proto *answer_prot;
127         unsigned char answer_flags;
128         int try_loading_module = 0;
129         int err;
130
131         if (protocol < 0 || protocol >= IPPROTO_MAX)
132                 return -EINVAL;
133
134         /* Look for the requested type/protocol pair. */
135 lookup_protocol:
136         err = -ESOCKTNOSUPPORT;
137         rcu_read_lock();
138         list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
139
140                 err = 0;
141                 /* Check the non-wild match. */
142                 if (protocol == answer->protocol) {
143                         if (protocol != IPPROTO_IP)
144                                 break;
145                 } else {
146                         /* Check for the two wild cases. */
147                         if (IPPROTO_IP == protocol) {
148                                 protocol = answer->protocol;
149                                 break;
150                         }
151                         if (IPPROTO_IP == answer->protocol)
152                                 break;
153                 }
154                 err = -EPROTONOSUPPORT;
155         }
156
157         if (err) {
158                 if (try_loading_module < 2) {
159                         rcu_read_unlock();
160                         /*
161                          * Be more specific, e.g. net-pf-10-proto-132-type-1
162                          * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
163                          */
164                         if (++try_loading_module == 1)
165                                 request_module("net-pf-%d-proto-%d-type-%d",
166                                                 PF_INET6, protocol, sock->type);
167                         /*
168                          * Fall back to generic, e.g. net-pf-10-proto-132
169                          * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
170                          */
171                         else
172                                 request_module("net-pf-%d-proto-%d",
173                                                 PF_INET6, protocol);
174                         goto lookup_protocol;
175                 } else
176                         goto out_rcu_unlock;
177         }
178
179         err = -EPERM;
180         if (sock->type == SOCK_RAW && !kern &&
181             !ns_capable(net->user_ns, CAP_NET_RAW))
182                 goto out_rcu_unlock;
183
184         sock->ops = answer->ops;
185         answer_prot = answer->prot;
186         answer_flags = answer->flags;
187         rcu_read_unlock();
188
189         WARN_ON(!answer_prot->slab);
190
191         err = -ENOBUFS;
192         sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot, kern);
193         if (!sk)
194                 goto out;
195
196         sock_init_data(sock, sk);
197
198         err = 0;
199         if (INET_PROTOSW_REUSE & answer_flags)
200                 sk->sk_reuse = SK_CAN_REUSE;
201
202         if (INET_PROTOSW_ICSK & answer_flags)
203                 inet_init_csk_locks(sk);
204
205         inet = inet_sk(sk);
206         inet_assign_bit(IS_ICSK, sk, INET_PROTOSW_ICSK & answer_flags);
207
208         if (SOCK_RAW == sock->type) {
209                 inet->inet_num = protocol;
210                 if (IPPROTO_RAW == protocol)
211                         inet_set_bit(HDRINCL, sk);
212         }
213
214         sk->sk_destruct         = inet6_sock_destruct;
215         sk->sk_family           = PF_INET6;
216         sk->sk_protocol         = protocol;
217
218         sk->sk_backlog_rcv      = answer->prot->backlog_rcv;
219
220         inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
221         np->hop_limit   = -1;
222         np->mcast_hops  = IPV6_DEFAULT_MCASTHOPS;
223         np->mc_loop     = 1;
224         np->mc_all      = 1;
225         np->pmtudisc    = IPV6_PMTUDISC_WANT;
226         np->repflow     = net->ipv6.sysctl.flowlabel_reflect & FLOWLABEL_REFLECT_ESTABLISHED;
227         sk->sk_ipv6only = net->ipv6.sysctl.bindv6only;
228         sk->sk_txrehash = READ_ONCE(net->core.sysctl_txrehash);
229
230         /* Init the ipv4 part of the socket since we can have sockets
231          * using v6 API for ipv4.
232          */
233         inet->uc_ttl    = -1;
234
235         inet_set_bit(MC_LOOP, sk);
236         inet->mc_ttl    = 1;
237         inet->mc_index  = 0;
238         RCU_INIT_POINTER(inet->mc_list, NULL);
239         inet->rcv_tos   = 0;
240
241         if (READ_ONCE(net->ipv4.sysctl_ip_no_pmtu_disc))
242                 inet->pmtudisc = IP_PMTUDISC_DONT;
243         else
244                 inet->pmtudisc = IP_PMTUDISC_WANT;
245
246         if (inet->inet_num) {
247                 /* It assumes that any protocol which allows
248                  * the user to assign a number at socket
249                  * creation time automatically shares.
250                  */
251                 inet->inet_sport = htons(inet->inet_num);
252                 err = sk->sk_prot->hash(sk);
253                 if (err) {
254                         sk_common_release(sk);
255                         goto out;
256                 }
257         }
258         if (sk->sk_prot->init) {
259                 err = sk->sk_prot->init(sk);
260                 if (err) {
261                         sk_common_release(sk);
262                         goto out;
263                 }
264         }
265
266         if (!kern) {
267                 err = BPF_CGROUP_RUN_PROG_INET_SOCK(sk);
268                 if (err) {
269                         sk_common_release(sk);
270                         goto out;
271                 }
272         }
273 out:
274         return err;
275 out_rcu_unlock:
276         rcu_read_unlock();
277         goto out;
278 }
279
280 static int __inet6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len,
281                         u32 flags)
282 {
283         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr;
284         struct inet_sock *inet = inet_sk(sk);
285         struct ipv6_pinfo *np = inet6_sk(sk);
286         struct net *net = sock_net(sk);
287         __be32 v4addr = 0;
288         unsigned short snum;
289         bool saved_ipv6only;
290         int addr_type = 0;
291         int err = 0;
292
293         if (addr->sin6_family != AF_INET6)
294                 return -EAFNOSUPPORT;
295
296         addr_type = ipv6_addr_type(&addr->sin6_addr);
297         if ((addr_type & IPV6_ADDR_MULTICAST) && sk->sk_type == SOCK_STREAM)
298                 return -EINVAL;
299
300         snum = ntohs(addr->sin6_port);
301         if (!(flags & BIND_NO_CAP_NET_BIND_SERVICE) &&
302             snum && inet_port_requires_bind_service(net, snum) &&
303             !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
304                 return -EACCES;
305
306         if (flags & BIND_WITH_LOCK)
307                 lock_sock(sk);
308
309         /* Check these errors (active socket, double bind). */
310         if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
311                 err = -EINVAL;
312                 goto out;
313         }
314
315         /* Check if the address belongs to the host. */
316         if (addr_type == IPV6_ADDR_MAPPED) {
317                 struct net_device *dev = NULL;
318                 int chk_addr_ret;
319
320                 /* Binding to v4-mapped address on a v6-only socket
321                  * makes no sense
322                  */
323                 if (ipv6_only_sock(sk)) {
324                         err = -EINVAL;
325                         goto out;
326                 }
327
328                 rcu_read_lock();
329                 if (sk->sk_bound_dev_if) {
330                         dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
331                         if (!dev) {
332                                 err = -ENODEV;
333                                 goto out_unlock;
334                         }
335                 }
336
337                 /* Reproduce AF_INET checks to make the bindings consistent */
338                 v4addr = addr->sin6_addr.s6_addr32[3];
339                 chk_addr_ret = inet_addr_type_dev_table(net, dev, v4addr);
340                 rcu_read_unlock();
341
342                 if (!inet_addr_valid_or_nonlocal(net, inet, v4addr,
343                                                  chk_addr_ret)) {
344                         err = -EADDRNOTAVAIL;
345                         goto out;
346                 }
347         } else {
348                 if (addr_type != IPV6_ADDR_ANY) {
349                         struct net_device *dev = NULL;
350
351                         rcu_read_lock();
352                         if (__ipv6_addr_needs_scope_id(addr_type)) {
353                                 if (addr_len >= sizeof(struct sockaddr_in6) &&
354                                     addr->sin6_scope_id) {
355                                         /* Override any existing binding, if another one
356                                          * is supplied by user.
357                                          */
358                                         sk->sk_bound_dev_if = addr->sin6_scope_id;
359                                 }
360
361                                 /* Binding to link-local address requires an interface */
362                                 if (!sk->sk_bound_dev_if) {
363                                         err = -EINVAL;
364                                         goto out_unlock;
365                                 }
366                         }
367
368                         if (sk->sk_bound_dev_if) {
369                                 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
370                                 if (!dev) {
371                                         err = -ENODEV;
372                                         goto out_unlock;
373                                 }
374                         }
375
376                         /* ipv4 addr of the socket is invalid.  Only the
377                          * unspecified and mapped address have a v4 equivalent.
378                          */
379                         v4addr = LOOPBACK4_IPV6;
380                         if (!(addr_type & IPV6_ADDR_MULTICAST)) {
381                                 if (!ipv6_can_nonlocal_bind(net, inet) &&
382                                     !ipv6_chk_addr(net, &addr->sin6_addr,
383                                                    dev, 0)) {
384                                         err = -EADDRNOTAVAIL;
385                                         goto out_unlock;
386                                 }
387                         }
388                         rcu_read_unlock();
389                 }
390         }
391
392         inet->inet_rcv_saddr = v4addr;
393         inet->inet_saddr = v4addr;
394
395         sk->sk_v6_rcv_saddr = addr->sin6_addr;
396
397         if (!(addr_type & IPV6_ADDR_MULTICAST))
398                 np->saddr = addr->sin6_addr;
399
400         saved_ipv6only = sk->sk_ipv6only;
401         if (addr_type != IPV6_ADDR_ANY && addr_type != IPV6_ADDR_MAPPED)
402                 sk->sk_ipv6only = 1;
403
404         /* Make sure we are allowed to bind here. */
405         if (snum || !(inet_test_bit(BIND_ADDRESS_NO_PORT, sk) ||
406                       (flags & BIND_FORCE_ADDRESS_NO_PORT))) {
407                 err = sk->sk_prot->get_port(sk, snum);
408                 if (err) {
409                         sk->sk_ipv6only = saved_ipv6only;
410                         inet_reset_saddr(sk);
411                         goto out;
412                 }
413                 if (!(flags & BIND_FROM_BPF)) {
414                         err = BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk);
415                         if (err) {
416                                 sk->sk_ipv6only = saved_ipv6only;
417                                 inet_reset_saddr(sk);
418                                 if (sk->sk_prot->put_port)
419                                         sk->sk_prot->put_port(sk);
420                                 goto out;
421                         }
422                 }
423         }
424
425         if (addr_type != IPV6_ADDR_ANY)
426                 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
427         if (snum)
428                 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
429         inet->inet_sport = htons(inet->inet_num);
430         inet->inet_dport = 0;
431         inet->inet_daddr = 0;
432 out:
433         if (flags & BIND_WITH_LOCK)
434                 release_sock(sk);
435         return err;
436 out_unlock:
437         rcu_read_unlock();
438         goto out;
439 }
440
441 int inet6_bind_sk(struct sock *sk, struct sockaddr *uaddr, int addr_len)
442 {
443         u32 flags = BIND_WITH_LOCK;
444         const struct proto *prot;
445         int err = 0;
446
447         /* IPV6_ADDRFORM can change sk->sk_prot under us. */
448         prot = READ_ONCE(sk->sk_prot);
449         /* If the socket has its own bind function then use it. */
450         if (prot->bind)
451                 return prot->bind(sk, uaddr, addr_len);
452
453         if (addr_len < SIN6_LEN_RFC2133)
454                 return -EINVAL;
455
456         /* BPF prog is run before any checks are done so that if the prog
457          * changes context in a wrong way it will be caught.
458          */
459         err = BPF_CGROUP_RUN_PROG_INET_BIND_LOCK(sk, uaddr, &addr_len,
460                                                  CGROUP_INET6_BIND, &flags);
461         if (err)
462                 return err;
463
464         return __inet6_bind(sk, uaddr, addr_len, flags);
465 }
466
467 /* bind for INET6 API */
468 int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
469 {
470         return inet6_bind_sk(sock->sk, uaddr, addr_len);
471 }
472 EXPORT_SYMBOL(inet6_bind);
473
474 int inet6_release(struct socket *sock)
475 {
476         struct sock *sk = sock->sk;
477
478         if (!sk)
479                 return -EINVAL;
480
481         /* Free mc lists */
482         ipv6_sock_mc_close(sk);
483
484         /* Free ac lists */
485         ipv6_sock_ac_close(sk);
486
487         return inet_release(sock);
488 }
489 EXPORT_SYMBOL(inet6_release);
490
491 void inet6_cleanup_sock(struct sock *sk)
492 {
493         struct ipv6_pinfo *np = inet6_sk(sk);
494         struct sk_buff *skb;
495         struct ipv6_txoptions *opt;
496
497         /* Release rx options */
498
499         skb = xchg(&np->pktoptions, NULL);
500         kfree_skb(skb);
501
502         skb = xchg(&np->rxpmtu, NULL);
503         kfree_skb(skb);
504
505         /* Free flowlabels */
506         fl6_free_socklist(sk);
507
508         /* Free tx options */
509
510         opt = xchg((__force struct ipv6_txoptions **)&np->opt, NULL);
511         if (opt) {
512                 atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
513                 txopt_put(opt);
514         }
515 }
516 EXPORT_SYMBOL_GPL(inet6_cleanup_sock);
517
518 /*
519  *      This does both peername and sockname.
520  */
521 int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
522                   int peer)
523 {
524         struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
525         int sin_addr_len = sizeof(*sin);
526         struct sock *sk = sock->sk;
527         struct inet_sock *inet = inet_sk(sk);
528         struct ipv6_pinfo *np = inet6_sk(sk);
529
530         sin->sin6_family = AF_INET6;
531         sin->sin6_flowinfo = 0;
532         sin->sin6_scope_id = 0;
533         lock_sock(sk);
534         if (peer) {
535                 if (!inet->inet_dport ||
536                     (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
537                     peer == 1)) {
538                         release_sock(sk);
539                         return -ENOTCONN;
540                 }
541                 sin->sin6_port = inet->inet_dport;
542                 sin->sin6_addr = sk->sk_v6_daddr;
543                 if (np->sndflow)
544                         sin->sin6_flowinfo = np->flow_label;
545                 BPF_CGROUP_RUN_SA_PROG(sk, (struct sockaddr *)sin, &sin_addr_len,
546                                        CGROUP_INET6_GETPEERNAME);
547         } else {
548                 if (ipv6_addr_any(&sk->sk_v6_rcv_saddr))
549                         sin->sin6_addr = np->saddr;
550                 else
551                         sin->sin6_addr = sk->sk_v6_rcv_saddr;
552                 sin->sin6_port = inet->inet_sport;
553                 BPF_CGROUP_RUN_SA_PROG(sk, (struct sockaddr *)sin, &sin_addr_len,
554                                        CGROUP_INET6_GETSOCKNAME);
555         }
556         sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
557                                                  sk->sk_bound_dev_if);
558         release_sock(sk);
559         return sin_addr_len;
560 }
561 EXPORT_SYMBOL(inet6_getname);
562
563 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
564 {
565         void __user *argp = (void __user *)arg;
566         struct sock *sk = sock->sk;
567         struct net *net = sock_net(sk);
568         const struct proto *prot;
569
570         switch (cmd) {
571         case SIOCADDRT:
572         case SIOCDELRT: {
573                 struct in6_rtmsg rtmsg;
574
575                 if (copy_from_user(&rtmsg, argp, sizeof(rtmsg)))
576                         return -EFAULT;
577                 return ipv6_route_ioctl(net, cmd, &rtmsg);
578         }
579         case SIOCSIFADDR:
580                 return addrconf_add_ifaddr(net, argp);
581         case SIOCDIFADDR:
582                 return addrconf_del_ifaddr(net, argp);
583         case SIOCSIFDSTADDR:
584                 return addrconf_set_dstaddr(net, argp);
585         default:
586                 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
587                 prot = READ_ONCE(sk->sk_prot);
588                 if (!prot->ioctl)
589                         return -ENOIOCTLCMD;
590                 return sk_ioctl(sk, cmd, (void __user *)arg);
591         }
592         /*NOTREACHED*/
593         return 0;
594 }
595 EXPORT_SYMBOL(inet6_ioctl);
596
597 #ifdef CONFIG_COMPAT
598 struct compat_in6_rtmsg {
599         struct in6_addr         rtmsg_dst;
600         struct in6_addr         rtmsg_src;
601         struct in6_addr         rtmsg_gateway;
602         u32                     rtmsg_type;
603         u16                     rtmsg_dst_len;
604         u16                     rtmsg_src_len;
605         u32                     rtmsg_metric;
606         u32                     rtmsg_info;
607         u32                     rtmsg_flags;
608         s32                     rtmsg_ifindex;
609 };
610
611 static int inet6_compat_routing_ioctl(struct sock *sk, unsigned int cmd,
612                 struct compat_in6_rtmsg __user *ur)
613 {
614         struct in6_rtmsg rt;
615
616         if (copy_from_user(&rt.rtmsg_dst, &ur->rtmsg_dst,
617                         3 * sizeof(struct in6_addr)) ||
618             get_user(rt.rtmsg_type, &ur->rtmsg_type) ||
619             get_user(rt.rtmsg_dst_len, &ur->rtmsg_dst_len) ||
620             get_user(rt.rtmsg_src_len, &ur->rtmsg_src_len) ||
621             get_user(rt.rtmsg_metric, &ur->rtmsg_metric) ||
622             get_user(rt.rtmsg_info, &ur->rtmsg_info) ||
623             get_user(rt.rtmsg_flags, &ur->rtmsg_flags) ||
624             get_user(rt.rtmsg_ifindex, &ur->rtmsg_ifindex))
625                 return -EFAULT;
626
627
628         return ipv6_route_ioctl(sock_net(sk), cmd, &rt);
629 }
630
631 int inet6_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
632 {
633         void __user *argp = compat_ptr(arg);
634         struct sock *sk = sock->sk;
635
636         switch (cmd) {
637         case SIOCADDRT:
638         case SIOCDELRT:
639                 return inet6_compat_routing_ioctl(sk, cmd, argp);
640         default:
641                 return -ENOIOCTLCMD;
642         }
643 }
644 EXPORT_SYMBOL_GPL(inet6_compat_ioctl);
645 #endif /* CONFIG_COMPAT */
646
647 INDIRECT_CALLABLE_DECLARE(int udpv6_sendmsg(struct sock *, struct msghdr *,
648                                             size_t));
649 int inet6_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
650 {
651         struct sock *sk = sock->sk;
652         const struct proto *prot;
653
654         if (unlikely(inet_send_prepare(sk)))
655                 return -EAGAIN;
656
657         /* IPV6_ADDRFORM can change sk->sk_prot under us. */
658         prot = READ_ONCE(sk->sk_prot);
659         return INDIRECT_CALL_2(prot->sendmsg, tcp_sendmsg, udpv6_sendmsg,
660                                sk, msg, size);
661 }
662
663 INDIRECT_CALLABLE_DECLARE(int udpv6_recvmsg(struct sock *, struct msghdr *,
664                                             size_t, int, int *));
665 int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
666                   int flags)
667 {
668         struct sock *sk = sock->sk;
669         const struct proto *prot;
670         int addr_len = 0;
671         int err;
672
673         if (likely(!(flags & MSG_ERRQUEUE)))
674                 sock_rps_record_flow(sk);
675
676         /* IPV6_ADDRFORM can change sk->sk_prot under us. */
677         prot = READ_ONCE(sk->sk_prot);
678         err = INDIRECT_CALL_2(prot->recvmsg, tcp_recvmsg, udpv6_recvmsg,
679                               sk, msg, size, flags, &addr_len);
680         if (err >= 0)
681                 msg->msg_namelen = addr_len;
682         return err;
683 }
684
685 const struct proto_ops inet6_stream_ops = {
686         .family            = PF_INET6,
687         .owner             = THIS_MODULE,
688         .release           = inet6_release,
689         .bind              = inet6_bind,
690         .connect           = inet_stream_connect,       /* ok           */
691         .socketpair        = sock_no_socketpair,        /* a do nothing */
692         .accept            = inet_accept,               /* ok           */
693         .getname           = inet6_getname,
694         .poll              = tcp_poll,                  /* ok           */
695         .ioctl             = inet6_ioctl,               /* must change  */
696         .gettstamp         = sock_gettstamp,
697         .listen            = inet_listen,               /* ok           */
698         .shutdown          = inet_shutdown,             /* ok           */
699         .setsockopt        = sock_common_setsockopt,    /* ok           */
700         .getsockopt        = sock_common_getsockopt,    /* ok           */
701         .sendmsg           = inet6_sendmsg,             /* retpoline's sake */
702         .recvmsg           = inet6_recvmsg,             /* retpoline's sake */
703 #ifdef CONFIG_MMU
704         .mmap              = tcp_mmap,
705 #endif
706         .splice_eof        = inet_splice_eof,
707         .sendmsg_locked    = tcp_sendmsg_locked,
708         .splice_read       = tcp_splice_read,
709         .read_sock         = tcp_read_sock,
710         .read_skb          = tcp_read_skb,
711         .peek_len          = tcp_peek_len,
712 #ifdef CONFIG_COMPAT
713         .compat_ioctl      = inet6_compat_ioctl,
714 #endif
715         .set_rcvlowat      = tcp_set_rcvlowat,
716 };
717
718 const struct proto_ops inet6_dgram_ops = {
719         .family            = PF_INET6,
720         .owner             = THIS_MODULE,
721         .release           = inet6_release,
722         .bind              = inet6_bind,
723         .connect           = inet_dgram_connect,        /* ok           */
724         .socketpair        = sock_no_socketpair,        /* a do nothing */
725         .accept            = sock_no_accept,            /* a do nothing */
726         .getname           = inet6_getname,
727         .poll              = udp_poll,                  /* ok           */
728         .ioctl             = inet6_ioctl,               /* must change  */
729         .gettstamp         = sock_gettstamp,
730         .listen            = sock_no_listen,            /* ok           */
731         .shutdown          = inet_shutdown,             /* ok           */
732         .setsockopt        = sock_common_setsockopt,    /* ok           */
733         .getsockopt        = sock_common_getsockopt,    /* ok           */
734         .sendmsg           = inet6_sendmsg,             /* retpoline's sake */
735         .recvmsg           = inet6_recvmsg,             /* retpoline's sake */
736         .read_skb          = udp_read_skb,
737         .mmap              = sock_no_mmap,
738         .set_peek_off      = sk_set_peek_off,
739 #ifdef CONFIG_COMPAT
740         .compat_ioctl      = inet6_compat_ioctl,
741 #endif
742 };
743
744 static const struct net_proto_family inet6_family_ops = {
745         .family = PF_INET6,
746         .create = inet6_create,
747         .owner  = THIS_MODULE,
748 };
749
750 int inet6_register_protosw(struct inet_protosw *p)
751 {
752         struct list_head *lh;
753         struct inet_protosw *answer;
754         struct list_head *last_perm;
755         int protocol = p->protocol;
756         int ret;
757
758         spin_lock_bh(&inetsw6_lock);
759
760         ret = -EINVAL;
761         if (p->type >= SOCK_MAX)
762                 goto out_illegal;
763
764         /* If we are trying to override a permanent protocol, bail. */
765         answer = NULL;
766         ret = -EPERM;
767         last_perm = &inetsw6[p->type];
768         list_for_each(lh, &inetsw6[p->type]) {
769                 answer = list_entry(lh, struct inet_protosw, list);
770
771                 /* Check only the non-wild match. */
772                 if (INET_PROTOSW_PERMANENT & answer->flags) {
773                         if (protocol == answer->protocol)
774                                 break;
775                         last_perm = lh;
776                 }
777
778                 answer = NULL;
779         }
780         if (answer)
781                 goto out_permanent;
782
783         /* Add the new entry after the last permanent entry if any, so that
784          * the new entry does not override a permanent entry when matched with
785          * a wild-card protocol. But it is allowed to override any existing
786          * non-permanent entry.  This means that when we remove this entry, the
787          * system automatically returns to the old behavior.
788          */
789         list_add_rcu(&p->list, last_perm);
790         ret = 0;
791 out:
792         spin_unlock_bh(&inetsw6_lock);
793         return ret;
794
795 out_permanent:
796         pr_err("Attempt to override permanent protocol %d\n", protocol);
797         goto out;
798
799 out_illegal:
800         pr_err("Ignoring attempt to register invalid socket type %d\n",
801                p->type);
802         goto out;
803 }
804 EXPORT_SYMBOL(inet6_register_protosw);
805
806 void
807 inet6_unregister_protosw(struct inet_protosw *p)
808 {
809         if (INET_PROTOSW_PERMANENT & p->flags) {
810                 pr_err("Attempt to unregister permanent protocol %d\n",
811                        p->protocol);
812         } else {
813                 spin_lock_bh(&inetsw6_lock);
814                 list_del_rcu(&p->list);
815                 spin_unlock_bh(&inetsw6_lock);
816
817                 synchronize_net();
818         }
819 }
820 EXPORT_SYMBOL(inet6_unregister_protosw);
821
822 int inet6_sk_rebuild_header(struct sock *sk)
823 {
824         struct ipv6_pinfo *np = inet6_sk(sk);
825         struct dst_entry *dst;
826
827         dst = __sk_dst_check(sk, np->dst_cookie);
828
829         if (!dst) {
830                 struct inet_sock *inet = inet_sk(sk);
831                 struct in6_addr *final_p, final;
832                 struct flowi6 fl6;
833
834                 memset(&fl6, 0, sizeof(fl6));
835                 fl6.flowi6_proto = sk->sk_protocol;
836                 fl6.daddr = sk->sk_v6_daddr;
837                 fl6.saddr = np->saddr;
838                 fl6.flowlabel = np->flow_label;
839                 fl6.flowi6_oif = sk->sk_bound_dev_if;
840                 fl6.flowi6_mark = sk->sk_mark;
841                 fl6.fl6_dport = inet->inet_dport;
842                 fl6.fl6_sport = inet->inet_sport;
843                 fl6.flowi6_uid = sk->sk_uid;
844                 security_sk_classify_flow(sk, flowi6_to_flowi_common(&fl6));
845
846                 rcu_read_lock();
847                 final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt),
848                                          &final);
849                 rcu_read_unlock();
850
851                 dst = ip6_dst_lookup_flow(sock_net(sk), sk, &fl6, final_p);
852                 if (IS_ERR(dst)) {
853                         sk->sk_route_caps = 0;
854                         WRITE_ONCE(sk->sk_err_soft, -PTR_ERR(dst));
855                         return PTR_ERR(dst);
856                 }
857
858                 ip6_dst_store(sk, dst, NULL, NULL);
859         }
860
861         return 0;
862 }
863 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
864
865 bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb,
866                        const struct inet6_skb_parm *opt)
867 {
868         const struct ipv6_pinfo *np = inet6_sk(sk);
869
870         if (np->rxopt.all) {
871                 if (((opt->flags & IP6SKB_HOPBYHOP) &&
872                      (np->rxopt.bits.hopopts || np->rxopt.bits.ohopopts)) ||
873                     (ip6_flowinfo((struct ipv6hdr *) skb_network_header(skb)) &&
874                      np->rxopt.bits.rxflow) ||
875                     (opt->srcrt && (np->rxopt.bits.srcrt ||
876                      np->rxopt.bits.osrcrt)) ||
877                     ((opt->dst1 || opt->dst0) &&
878                      (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
879                         return true;
880         }
881         return false;
882 }
883 EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
884
885 static struct packet_type ipv6_packet_type __read_mostly = {
886         .type = cpu_to_be16(ETH_P_IPV6),
887         .func = ipv6_rcv,
888         .list_func = ipv6_list_rcv,
889 };
890
891 static int __init ipv6_packet_init(void)
892 {
893         dev_add_pack(&ipv6_packet_type);
894         return 0;
895 }
896
897 static void ipv6_packet_cleanup(void)
898 {
899         dev_remove_pack(&ipv6_packet_type);
900 }
901
902 static int __net_init ipv6_init_mibs(struct net *net)
903 {
904         int i;
905
906         net->mib.udp_stats_in6 = alloc_percpu(struct udp_mib);
907         if (!net->mib.udp_stats_in6)
908                 return -ENOMEM;
909         net->mib.udplite_stats_in6 = alloc_percpu(struct udp_mib);
910         if (!net->mib.udplite_stats_in6)
911                 goto err_udplite_mib;
912         net->mib.ipv6_statistics = alloc_percpu(struct ipstats_mib);
913         if (!net->mib.ipv6_statistics)
914                 goto err_ip_mib;
915
916         for_each_possible_cpu(i) {
917                 struct ipstats_mib *af_inet6_stats;
918                 af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics, i);
919                 u64_stats_init(&af_inet6_stats->syncp);
920         }
921
922
923         net->mib.icmpv6_statistics = alloc_percpu(struct icmpv6_mib);
924         if (!net->mib.icmpv6_statistics)
925                 goto err_icmp_mib;
926         net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib),
927                                                 GFP_KERNEL);
928         if (!net->mib.icmpv6msg_statistics)
929                 goto err_icmpmsg_mib;
930         return 0;
931
932 err_icmpmsg_mib:
933         free_percpu(net->mib.icmpv6_statistics);
934 err_icmp_mib:
935         free_percpu(net->mib.ipv6_statistics);
936 err_ip_mib:
937         free_percpu(net->mib.udplite_stats_in6);
938 err_udplite_mib:
939         free_percpu(net->mib.udp_stats_in6);
940         return -ENOMEM;
941 }
942
943 static void ipv6_cleanup_mibs(struct net *net)
944 {
945         free_percpu(net->mib.udp_stats_in6);
946         free_percpu(net->mib.udplite_stats_in6);
947         free_percpu(net->mib.ipv6_statistics);
948         free_percpu(net->mib.icmpv6_statistics);
949         kfree(net->mib.icmpv6msg_statistics);
950 }
951
952 static int __net_init inet6_net_init(struct net *net)
953 {
954         int err = 0;
955
956         net->ipv6.sysctl.bindv6only = 0;
957         net->ipv6.sysctl.icmpv6_time = 1*HZ;
958         net->ipv6.sysctl.icmpv6_echo_ignore_all = 0;
959         net->ipv6.sysctl.icmpv6_echo_ignore_multicast = 0;
960         net->ipv6.sysctl.icmpv6_echo_ignore_anycast = 0;
961         net->ipv6.sysctl.icmpv6_error_anycast_as_unicast = 0;
962
963         /* By default, rate limit error messages.
964          * Except for pmtu discovery, it would break it.
965          * proc_do_large_bitmap needs pointer to the bitmap.
966          */
967         bitmap_set(net->ipv6.sysctl.icmpv6_ratemask, 0, ICMPV6_ERRMSG_MAX + 1);
968         bitmap_clear(net->ipv6.sysctl.icmpv6_ratemask, ICMPV6_PKT_TOOBIG, 1);
969         net->ipv6.sysctl.icmpv6_ratemask_ptr = net->ipv6.sysctl.icmpv6_ratemask;
970
971         net->ipv6.sysctl.flowlabel_consistency = 1;
972         net->ipv6.sysctl.auto_flowlabels = IP6_DEFAULT_AUTO_FLOW_LABELS;
973         net->ipv6.sysctl.idgen_retries = 3;
974         net->ipv6.sysctl.idgen_delay = 1 * HZ;
975         net->ipv6.sysctl.flowlabel_state_ranges = 0;
976         net->ipv6.sysctl.max_dst_opts_cnt = IP6_DEFAULT_MAX_DST_OPTS_CNT;
977         net->ipv6.sysctl.max_hbh_opts_cnt = IP6_DEFAULT_MAX_HBH_OPTS_CNT;
978         net->ipv6.sysctl.max_dst_opts_len = IP6_DEFAULT_MAX_DST_OPTS_LEN;
979         net->ipv6.sysctl.max_hbh_opts_len = IP6_DEFAULT_MAX_HBH_OPTS_LEN;
980         net->ipv6.sysctl.fib_notify_on_flag_change = 0;
981         atomic_set(&net->ipv6.fib6_sernum, 1);
982
983         net->ipv6.sysctl.ioam6_id = IOAM6_DEFAULT_ID;
984         net->ipv6.sysctl.ioam6_id_wide = IOAM6_DEFAULT_ID_WIDE;
985
986         err = ipv6_init_mibs(net);
987         if (err)
988                 return err;
989 #ifdef CONFIG_PROC_FS
990         err = udp6_proc_init(net);
991         if (err)
992                 goto out;
993         err = tcp6_proc_init(net);
994         if (err)
995                 goto proc_tcp6_fail;
996         err = ac6_proc_init(net);
997         if (err)
998                 goto proc_ac6_fail;
999 #endif
1000         return err;
1001
1002 #ifdef CONFIG_PROC_FS
1003 proc_ac6_fail:
1004         tcp6_proc_exit(net);
1005 proc_tcp6_fail:
1006         udp6_proc_exit(net);
1007 out:
1008         ipv6_cleanup_mibs(net);
1009         return err;
1010 #endif
1011 }
1012
1013 static void __net_exit inet6_net_exit(struct net *net)
1014 {
1015 #ifdef CONFIG_PROC_FS
1016         udp6_proc_exit(net);
1017         tcp6_proc_exit(net);
1018         ac6_proc_exit(net);
1019 #endif
1020         ipv6_cleanup_mibs(net);
1021 }
1022
1023 static struct pernet_operations inet6_net_ops = {
1024         .init = inet6_net_init,
1025         .exit = inet6_net_exit,
1026 };
1027
1028 static int ipv6_route_input(struct sk_buff *skb)
1029 {
1030         ip6_route_input(skb);
1031         return skb_dst(skb)->error;
1032 }
1033
1034 static const struct ipv6_stub ipv6_stub_impl = {
1035         .ipv6_sock_mc_join = ipv6_sock_mc_join,
1036         .ipv6_sock_mc_drop = ipv6_sock_mc_drop,
1037         .ipv6_dst_lookup_flow = ip6_dst_lookup_flow,
1038         .ipv6_route_input  = ipv6_route_input,
1039         .fib6_get_table    = fib6_get_table,
1040         .fib6_table_lookup = fib6_table_lookup,
1041         .fib6_lookup       = fib6_lookup,
1042         .fib6_select_path  = fib6_select_path,
1043         .ip6_mtu_from_fib6 = ip6_mtu_from_fib6,
1044         .fib6_nh_init      = fib6_nh_init,
1045         .fib6_nh_release   = fib6_nh_release,
1046         .fib6_nh_release_dsts = fib6_nh_release_dsts,
1047         .fib6_update_sernum = fib6_update_sernum_stub,
1048         .fib6_rt_update    = fib6_rt_update,
1049         .ip6_del_rt        = ip6_del_rt,
1050         .udpv6_encap_enable = udpv6_encap_enable,
1051         .ndisc_send_na = ndisc_send_na,
1052 #if IS_ENABLED(CONFIG_XFRM)
1053         .xfrm6_local_rxpmtu = xfrm6_local_rxpmtu,
1054         .xfrm6_udp_encap_rcv = xfrm6_udp_encap_rcv,
1055         .xfrm6_rcv_encap = xfrm6_rcv_encap,
1056 #endif
1057         .nd_tbl = &nd_tbl,
1058         .ipv6_fragment = ip6_fragment,
1059         .ipv6_dev_find = ipv6_dev_find,
1060 };
1061
1062 static const struct ipv6_bpf_stub ipv6_bpf_stub_impl = {
1063         .inet6_bind = __inet6_bind,
1064         .udp6_lib_lookup = __udp6_lib_lookup,
1065         .ipv6_setsockopt = do_ipv6_setsockopt,
1066         .ipv6_getsockopt = do_ipv6_getsockopt,
1067 };
1068
1069 static int __init inet6_init(void)
1070 {
1071         struct list_head *r;
1072         int err = 0;
1073
1074         sock_skb_cb_check_size(sizeof(struct inet6_skb_parm));
1075
1076         /* Register the socket-side information for inet6_create.  */
1077         for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
1078                 INIT_LIST_HEAD(r);
1079
1080         raw_hashinfo_init(&raw_v6_hashinfo);
1081
1082         if (disable_ipv6_mod) {
1083                 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
1084                 goto out;
1085         }
1086
1087         err = proto_register(&tcpv6_prot, 1);
1088         if (err)
1089                 goto out;
1090
1091         err = proto_register(&udpv6_prot, 1);
1092         if (err)
1093                 goto out_unregister_tcp_proto;
1094
1095         err = proto_register(&udplitev6_prot, 1);
1096         if (err)
1097                 goto out_unregister_udp_proto;
1098
1099         err = proto_register(&rawv6_prot, 1);
1100         if (err)
1101                 goto out_unregister_udplite_proto;
1102
1103         err = proto_register(&pingv6_prot, 1);
1104         if (err)
1105                 goto out_unregister_raw_proto;
1106
1107         /* We MUST register RAW sockets before we create the ICMP6,
1108          * IGMP6, or NDISC control sockets.
1109          */
1110         err = rawv6_init();
1111         if (err)
1112                 goto out_unregister_ping_proto;
1113
1114         /* Register the family here so that the init calls below will
1115          * be able to create sockets. (?? is this dangerous ??)
1116          */
1117         err = sock_register(&inet6_family_ops);
1118         if (err)
1119                 goto out_sock_register_fail;
1120
1121         /*
1122          *      ipngwg API draft makes clear that the correct semantics
1123          *      for TCP and UDP is to consider one TCP and UDP instance
1124          *      in a host available by both INET and INET6 APIs and
1125          *      able to communicate via both network protocols.
1126          */
1127
1128         err = register_pernet_subsys(&inet6_net_ops);
1129         if (err)
1130                 goto register_pernet_fail;
1131         err = ip6_mr_init();
1132         if (err)
1133                 goto ipmr_fail;
1134         err = icmpv6_init();
1135         if (err)
1136                 goto icmp_fail;
1137         err = ndisc_init();
1138         if (err)
1139                 goto ndisc_fail;
1140         err = igmp6_init();
1141         if (err)
1142                 goto igmp_fail;
1143
1144         err = ipv6_netfilter_init();
1145         if (err)
1146                 goto netfilter_fail;
1147         /* Create /proc/foo6 entries. */
1148 #ifdef CONFIG_PROC_FS
1149         err = -ENOMEM;
1150         if (raw6_proc_init())
1151                 goto proc_raw6_fail;
1152         if (udplite6_proc_init())
1153                 goto proc_udplite6_fail;
1154         if (ipv6_misc_proc_init())
1155                 goto proc_misc6_fail;
1156         if (if6_proc_init())
1157                 goto proc_if6_fail;
1158 #endif
1159         err = ip6_route_init();
1160         if (err)
1161                 goto ip6_route_fail;
1162         err = ndisc_late_init();
1163         if (err)
1164                 goto ndisc_late_fail;
1165         err = ip6_flowlabel_init();
1166         if (err)
1167                 goto ip6_flowlabel_fail;
1168         err = ipv6_anycast_init();
1169         if (err)
1170                 goto ipv6_anycast_fail;
1171         err = addrconf_init();
1172         if (err)
1173                 goto addrconf_fail;
1174
1175         /* Init v6 extension headers. */
1176         err = ipv6_exthdrs_init();
1177         if (err)
1178                 goto ipv6_exthdrs_fail;
1179
1180         err = ipv6_frag_init();
1181         if (err)
1182                 goto ipv6_frag_fail;
1183
1184         /* Init v6 transport protocols. */
1185         err = udpv6_init();
1186         if (err)
1187                 goto udpv6_fail;
1188
1189         err = udplitev6_init();
1190         if (err)
1191                 goto udplitev6_fail;
1192
1193         err = udpv6_offload_init();
1194         if (err)
1195                 goto udpv6_offload_fail;
1196
1197         err = tcpv6_init();
1198         if (err)
1199                 goto tcpv6_fail;
1200
1201         err = ipv6_packet_init();
1202         if (err)
1203                 goto ipv6_packet_fail;
1204
1205         err = pingv6_init();
1206         if (err)
1207                 goto pingv6_fail;
1208
1209         err = calipso_init();
1210         if (err)
1211                 goto calipso_fail;
1212
1213         err = seg6_init();
1214         if (err)
1215                 goto seg6_fail;
1216
1217         err = rpl_init();
1218         if (err)
1219                 goto rpl_fail;
1220
1221         err = ioam6_init();
1222         if (err)
1223                 goto ioam6_fail;
1224
1225         err = igmp6_late_init();
1226         if (err)
1227                 goto igmp6_late_err;
1228
1229 #ifdef CONFIG_SYSCTL
1230         err = ipv6_sysctl_register();
1231         if (err)
1232                 goto sysctl_fail;
1233 #endif
1234
1235         /* ensure that ipv6 stubs are visible only after ipv6 is ready */
1236         wmb();
1237         ipv6_stub = &ipv6_stub_impl;
1238         ipv6_bpf_stub = &ipv6_bpf_stub_impl;
1239 out:
1240         return err;
1241
1242 #ifdef CONFIG_SYSCTL
1243 sysctl_fail:
1244         igmp6_late_cleanup();
1245 #endif
1246 igmp6_late_err:
1247         ioam6_exit();
1248 ioam6_fail:
1249         rpl_exit();
1250 rpl_fail:
1251         seg6_exit();
1252 seg6_fail:
1253         calipso_exit();
1254 calipso_fail:
1255         pingv6_exit();
1256 pingv6_fail:
1257         ipv6_packet_cleanup();
1258 ipv6_packet_fail:
1259         tcpv6_exit();
1260 tcpv6_fail:
1261         udpv6_offload_exit();
1262 udpv6_offload_fail:
1263         udplitev6_exit();
1264 udplitev6_fail:
1265         udpv6_exit();
1266 udpv6_fail:
1267         ipv6_frag_exit();
1268 ipv6_frag_fail:
1269         ipv6_exthdrs_exit();
1270 ipv6_exthdrs_fail:
1271         addrconf_cleanup();
1272 addrconf_fail:
1273         ipv6_anycast_cleanup();
1274 ipv6_anycast_fail:
1275         ip6_flowlabel_cleanup();
1276 ip6_flowlabel_fail:
1277         ndisc_late_cleanup();
1278 ndisc_late_fail:
1279         ip6_route_cleanup();
1280 ip6_route_fail:
1281 #ifdef CONFIG_PROC_FS
1282         if6_proc_exit();
1283 proc_if6_fail:
1284         ipv6_misc_proc_exit();
1285 proc_misc6_fail:
1286         udplite6_proc_exit();
1287 proc_udplite6_fail:
1288         raw6_proc_exit();
1289 proc_raw6_fail:
1290 #endif
1291         ipv6_netfilter_fini();
1292 netfilter_fail:
1293         igmp6_cleanup();
1294 igmp_fail:
1295         ndisc_cleanup();
1296 ndisc_fail:
1297         icmpv6_cleanup();
1298 icmp_fail:
1299         ip6_mr_cleanup();
1300 ipmr_fail:
1301         unregister_pernet_subsys(&inet6_net_ops);
1302 register_pernet_fail:
1303         sock_unregister(PF_INET6);
1304         rtnl_unregister_all(PF_INET6);
1305 out_sock_register_fail:
1306         rawv6_exit();
1307 out_unregister_ping_proto:
1308         proto_unregister(&pingv6_prot);
1309 out_unregister_raw_proto:
1310         proto_unregister(&rawv6_prot);
1311 out_unregister_udplite_proto:
1312         proto_unregister(&udplitev6_prot);
1313 out_unregister_udp_proto:
1314         proto_unregister(&udpv6_prot);
1315 out_unregister_tcp_proto:
1316         proto_unregister(&tcpv6_prot);
1317         goto out;
1318 }
1319 module_init(inet6_init);
1320
1321 MODULE_ALIAS_NETPROTO(PF_INET6);