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
  67 #include <linux/uaccess.h>
  68 #include <linux/mroute6.h>
  69
  70 #include "ip6_offload.h"
  71
  72 MODULE_AUTHOR("Cast of dozens");
  73 MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
  74 MODULE_LICENSE("GPL");
  75
  76 /* The inetsw6 table contains everything that inet6_create needs to
  77  * build a new socket.
  78  */
  79 static struct list_head inetsw6[SOCK_MAX];
  80 static DEFINE_SPINLOCK(inetsw6_lock);
  81
  82 struct ipv6_params ipv6_defaults = {
  83         .disable_ipv6 = 0,
  84         .autoconf = 1,
  85 };
  86
  87 static int disable_ipv6_mod;
  88
  89 module_param_named(disable, disable_ipv6_mod, int, 0444);
  90 MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional");
  91
  92 module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444);
  93 MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces");
  94
  95 module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444);
  96 MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces");
  97
  98 bool ipv6_mod_enabled(void)
  99 {
 100         return disable_ipv6_mod == 0;
 101 }
 102 EXPORT_SYMBOL_GPL(ipv6_mod_enabled);
 103
 104 static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
 105 {
 106         const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
 107
 108         return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
 109 }
 110
 111 void inet6_sock_destruct(struct sock *sk)
 112 {
 113         inet6_cleanup_sock(sk);
 114         inet_sock_destruct(sk);
 115 }
 116 EXPORT_SYMBOL_GPL(inet6_sock_destruct);
 117
 118 static int inet6_create(struct net *net, struct socket *sock, int protocol,
 119                         int kern)
 120 {
 121         struct inet_sock *inet;
 122         struct ipv6_pinfo *np;
 123         struct sock *sk;
 124         struct inet_protosw *answer;
 125         struct proto *answer_prot;
 126         unsigned char answer_flags;
 127         int try_loading_module = 0;
 128         int err;
 129
 130         if (protocol < 0 || protocol >= IPPROTO_MAX)
 131                 return -EINVAL;
 132
 133         /* Look for the requested type/protocol pair. */
 134 lookup_protocol:
 135         err = -ESOCKTNOSUPPORT;
 136         rcu_read_lock();
 137         list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
 138
 139                 err = 0;
 140                 /* Check the non-wild match. */
 141                 if (protocol == answer->protocol) {
 142                         if (protocol != IPPROTO_IP)
 143                                 break;
 144                 } else {
 145                         /* Check for the two wild cases. */
 146                         if (IPPROTO_IP == protocol) {
 147                                 protocol = answer->protocol;
 148                                 break;
 149                         }
 150                         if (IPPROTO_IP == answer->protocol)
 151                                 break;
 152                 }
 153                 err = -EPROTONOSUPPORT;
 154         }
 155
 156         if (err) {
 157                 if (try_loading_module < 2) {
 158                         rcu_read_unlock();
 159                         /*
 160                          * Be more specific, e.g. net-pf-10-proto-132-type-1
 161                          * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
 162                          */
 163                         if (++try_loading_module == 1)
 164                                 request_module("net-pf-%d-proto-%d-type-%d",
 165                                                 PF_INET6, protocol, sock->type);
 166                         /*
 167                          * Fall back to generic, e.g. net-pf-10-proto-132
 168                          * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
 169                          */
 170                         else
 171                                 request_module("net-pf-%d-proto-%d",
 172                                                 PF_INET6, protocol);
 173                         goto lookup_protocol;
 174                 } else
 175                         goto out_rcu_unlock;
 176         }
 177
 178         err = -EPERM;
 179         if (sock->type == SOCK_RAW && !kern &&
 180             !ns_capable(net->user_ns, CAP_NET_RAW))
 181                 goto out_rcu_unlock;
 182
 183         sock->ops = answer->ops;
 184         answer_prot = answer->prot;
 185         answer_flags = answer->flags;
 186         rcu_read_unlock();
 187
 188         WARN_ON(!answer_prot->slab);
 189
 190         err = -ENOBUFS;
 191         sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot, kern);
 192         if (!sk)
 193                 goto out;
 194
 195         sock_init_data(sock, sk);
 196
 197         err = 0;
 198         if (INET_PROTOSW_REUSE & answer_flags)
 199                 sk->sk_reuse = SK_CAN_REUSE;
 200
 201         inet = inet_sk(sk);
 202         inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
 203
 204         if (SOCK_RAW == sock->type) {
 205                 inet->inet_num = protocol;
 206                 if (IPPROTO_RAW == protocol)
 207                         inet->hdrincl = 1;
 208         }
 209
 210         sk->sk_destruct         = inet6_sock_destruct;
 211         sk->sk_family           = PF_INET6;
 212         sk->sk_protocol         = protocol;
 213
 214         sk->sk_backlog_rcv      = answer->prot->backlog_rcv;
 215
 216         inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
 217         np->hop_limit   = -1;
 218         np->mcast_hops  = IPV6_DEFAULT_MCASTHOPS;
 219         np->mc_loop     = 1;
 220         np->mc_all      = 1;
 221         np->pmtudisc    = IPV6_PMTUDISC_WANT;
 222         np->repflow     = net->ipv6.sysctl.flowlabel_reflect & FLOWLABEL_REFLECT_ESTABLISHED;
 223         sk->sk_ipv6only = net->ipv6.sysctl.bindv6only;
 224
 225         /* Init the ipv4 part of the socket since we can have sockets
 226          * using v6 API for ipv4.
 227          */
 228         inet->uc_ttl    = -1;
 229
 230         inet->mc_loop   = 1;
 231         inet->mc_ttl    = 1;
 232         inet->mc_index  = 0;
 233         RCU_INIT_POINTER(inet->mc_list, NULL);
 234         inet->rcv_tos   = 0;
 235
 236         if (READ_ONCE(net->ipv4.sysctl_ip_no_pmtu_disc))
 237                 inet->pmtudisc = IP_PMTUDISC_DONT;
 238         else
 239                 inet->pmtudisc = IP_PMTUDISC_WANT;
 240         /*
 241          * Increment only the relevant sk_prot->socks debug field, this changes
 242          * the previous behaviour of incrementing both the equivalent to
 243          * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
 244          *
 245          * This allows better debug granularity as we'll know exactly how many
 246          * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
 247          * transport protocol socks. -acme
 248          */
 249         sk_refcnt_debug_inc(sk);
 250
 251         if (inet->inet_num) {
 252                 /* It assumes that any protocol which allows
 253                  * the user to assign a number at socket
 254                  * creation time automatically shares.
 255                  */
 256                 inet->inet_sport = htons(inet->inet_num);
 257                 err = sk->sk_prot->hash(sk);
 258                 if (err) {
 259                         sk_common_release(sk);
 260                         goto out;
 261                 }
 262         }
 263         if (sk->sk_prot->init) {
 264                 err = sk->sk_prot->init(sk);
 265                 if (err) {
 266                         sk_common_release(sk);
 267                         goto out;
 268                 }
 269         }
 270
 271         if (!kern) {
 272                 err = BPF_CGROUP_RUN_PROG_INET_SOCK(sk);
 273                 if (err) {
 274                         sk_common_release(sk);
 275                         goto out;
 276                 }
 277         }
 278 out:
 279         return err;
 280 out_rcu_unlock:
 281         rcu_read_unlock();
 282         goto out;
 283 }
 284
 285 static int __inet6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len,
 286                         u32 flags)
 287 {
 288         struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr;
 289         struct inet_sock *inet = inet_sk(sk);
 290         struct ipv6_pinfo *np = inet6_sk(sk);
 291         struct net *net = sock_net(sk);
 292         __be32 v4addr = 0;
 293         unsigned short snum;
 294         bool saved_ipv6only;
 295         int addr_type = 0;
 296         int err = 0;
 297
 298         if (addr->sin6_family != AF_INET6)
 299                 return -EAFNOSUPPORT;
 300
 301         addr_type = ipv6_addr_type(&addr->sin6_addr);
 302         if ((addr_type & IPV6_ADDR_MULTICAST) && sk->sk_type == SOCK_STREAM)
 303                 return -EINVAL;
 304
 305         snum = ntohs(addr->sin6_port);
 306         if (!(flags & BIND_NO_CAP_NET_BIND_SERVICE) &&
 307             snum && inet_port_requires_bind_service(net, snum) &&
 308             !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
 309                 return -EACCES;
 310
 311         if (flags & BIND_WITH_LOCK)
 312                 lock_sock(sk);
 313
 314         /* Check these errors (active socket, double bind). */
 315         if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
 316                 err = -EINVAL;
 317                 goto out;
 318         }
 319
 320         /* Check if the address belongs to the host. */
 321         if (addr_type == IPV6_ADDR_MAPPED) {
 322                 struct net_device *dev = NULL;
 323                 int chk_addr_ret;
 324
 325                 /* Binding to v4-mapped address on a v6-only socket
 326                  * makes no sense
 327                  */
 328                 if (sk->sk_ipv6only) {
 329                         err = -EINVAL;
 330                         goto out;
 331                 }
 332
 333                 rcu_read_lock();
 334                 if (sk->sk_bound_dev_if) {
 335                         dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
 336                         if (!dev) {
 337                                 err = -ENODEV;
 338                                 goto out_unlock;
 339                         }
 340                 }
 341
 342                 /* Reproduce AF_INET checks to make the bindings consistent */
 343                 v4addr = addr->sin6_addr.s6_addr32[3];
 344                 chk_addr_ret = inet_addr_type_dev_table(net, dev, v4addr);
 345                 rcu_read_unlock();
 346
 347                 if (!inet_can_nonlocal_bind(net, inet) &&
 348                     v4addr != htonl(INADDR_ANY) &&
 349                     chk_addr_ret != RTN_LOCAL &&
 350                     chk_addr_ret != RTN_MULTICAST &&
 351                     chk_addr_ret != RTN_BROADCAST) {
 352                         err = -EADDRNOTAVAIL;
 353                         goto out;
 354                 }
 355         } else {
 356                 if (addr_type != IPV6_ADDR_ANY) {
 357                         struct net_device *dev = NULL;
 358
 359                         rcu_read_lock();
 360                         if (__ipv6_addr_needs_scope_id(addr_type)) {
 361                                 if (addr_len >= sizeof(struct sockaddr_in6) &&
 362                                     addr->sin6_scope_id) {
 363                                         /* Override any existing binding, if another one
 364                                          * is supplied by user.
 365                                          */
 366                                         sk->sk_bound_dev_if = addr->sin6_scope_id;
 367                                 }
 368
 369                                 /* Binding to link-local address requires an interface */
 370                                 if (!sk->sk_bound_dev_if) {
 371                                         err = -EINVAL;
 372                                         goto out_unlock;
 373                                 }
 374                         }
 375
 376                         if (sk->sk_bound_dev_if) {
 377                                 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
 378                                 if (!dev) {
 379                                         err = -ENODEV;
 380                                         goto out_unlock;
 381                                 }
 382                         }
 383
 384                         /* ipv4 addr of the socket is invalid.  Only the
 385                          * unspecified and mapped address have a v4 equivalent.
 386                          */
 387                         v4addr = LOOPBACK4_IPV6;
 388                         if (!(addr_type & IPV6_ADDR_MULTICAST)) {
 389                                 if (!ipv6_can_nonlocal_bind(net, inet) &&
 390                                     !ipv6_chk_addr(net, &addr->sin6_addr,
 391                                                    dev, 0)) {
 392                                         err = -EADDRNOTAVAIL;
 393                                         goto out_unlock;
 394                                 }
 395                         }
 396                         rcu_read_unlock();
 397                 }
 398         }
 399
 400         inet->inet_rcv_saddr = v4addr;
 401         inet->inet_saddr = v4addr;
 402
 403         sk->sk_v6_rcv_saddr = addr->sin6_addr;
 404
 405         if (!(addr_type & IPV6_ADDR_MULTICAST))
 406                 np->saddr = addr->sin6_addr;
 407
 408         saved_ipv6only = sk->sk_ipv6only;
 409         if (addr_type != IPV6_ADDR_ANY && addr_type != IPV6_ADDR_MAPPED)
 410                 sk->sk_ipv6only = 1;
 411
 412         /* Make sure we are allowed to bind here. */
 413         if (snum || !(inet->bind_address_no_port ||
 414                       (flags & BIND_FORCE_ADDRESS_NO_PORT))) {
 415                 if (sk->sk_prot->get_port(sk, snum)) {
 416                         sk->sk_ipv6only = saved_ipv6only;
 417                         inet_reset_saddr(sk);
 418                         err = -EADDRINUSE;
 419                         goto out;
 420                 }
 421                 if (!(flags & BIND_FROM_BPF)) {
 422                         err = BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk);
 423                         if (err) {
 424                                 sk->sk_ipv6only = saved_ipv6only;
 425                                 inet_reset_saddr(sk);
 426                                 goto out;
 427                         }
 428                 }
 429         }
 430
 431         if (addr_type != IPV6_ADDR_ANY)
 432                 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
 433         if (snum)
 434                 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
 435         inet->inet_sport = htons(inet->inet_num);
 436         inet->inet_dport = 0;
 437         inet->inet_daddr = 0;
 438 out:
 439         if (flags & BIND_WITH_LOCK)
 440                 release_sock(sk);
 441         return err;
 442 out_unlock:
 443         rcu_read_unlock();
 444         goto out;
 445 }
 446
 447 /* bind for INET6 API */
 448 int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
 449 {
 450         struct sock *sk = sock->sk;
 451         u32 flags = BIND_WITH_LOCK;
 452         int err = 0;
 453
 454         /* If the socket has its own bind function then use it. */
 455         if (sk->sk_prot->bind)
 456                 return sk->sk_prot->bind(sk, uaddr, addr_len);
 457
 458         if (addr_len < SIN6_LEN_RFC2133)
 459                 return -EINVAL;
 460
 461         /* BPF prog is run before any checks are done so that if the prog
 462          * changes context in a wrong way it will be caught.
 463          */
 464         err = BPF_CGROUP_RUN_PROG_INET_BIND_LOCK(sk, uaddr,
 465                                                  CGROUP_INET6_BIND, &flags);
 466         if (err)
 467                 return err;
 468
 469         return __inet6_bind(sk, uaddr, addr_len, flags);
 470 }
 471 EXPORT_SYMBOL(inet6_bind);
 472
 473 int inet6_release(struct socket *sock)
 474 {
 475         struct sock *sk = sock->sk;
 476
 477         if (!sk)
 478                 return -EINVAL;
 479
 480         /* Free mc lists */
 481         ipv6_sock_mc_close(sk);
 482
 483         /* Free ac lists */
 484         ipv6_sock_ac_close(sk);
 485
 486         return inet_release(sock);
 487 }
 488 EXPORT_SYMBOL(inet6_release);
 489
 490 void inet6_destroy_sock(struct sock *sk)
 491 {
 492         struct ipv6_pinfo *np = inet6_sk(sk);
 493         struct sk_buff *skb;
 494         struct ipv6_txoptions *opt;
 495
 496         /* Release rx options */
 497
 498         skb = xchg(&np->pktoptions, NULL);
 499         kfree_skb(skb);
 500
 501         skb = xchg(&np->rxpmtu, NULL);
 502         kfree_skb(skb);
 503
 504         /* Free flowlabels */
 505         fl6_free_socklist(sk);
 506
 507         /* Free tx options */
 508
 509         opt = xchg((__force struct ipv6_txoptions **)&np->opt, NULL);
 510         if (opt) {
 511                 atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
 512                 txopt_put(opt);
 513         }
 514 }
 515 EXPORT_SYMBOL_GPL(inet6_destroy_sock);
 516
 517 void inet6_cleanup_sock(struct sock *sk)
 518 {
 519         inet6_destroy_sock(sk);
 520 }
 521 EXPORT_SYMBOL_GPL(inet6_cleanup_sock);
 522
 523 /*
 524  *      This does both peername and sockname.
 525  */
 526 int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
 527                   int peer)
 528 {
 529         struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
 530         struct sock *sk = sock->sk;
 531         struct inet_sock *inet = inet_sk(sk);
 532         struct ipv6_pinfo *np = inet6_sk(sk);
 533
 534         sin->sin6_family = AF_INET6;
 535         sin->sin6_flowinfo = 0;
 536         sin->sin6_scope_id = 0;
 537         lock_sock(sk);
 538         if (peer) {
 539                 if (!inet->inet_dport ||
 540                     (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
 541                     peer == 1)) {
 542                         release_sock(sk);
 543                         return -ENOTCONN;
 544                 }
 545                 sin->sin6_port = inet->inet_dport;
 546                 sin->sin6_addr = sk->sk_v6_daddr;
 547                 if (np->sndflow)
 548                         sin->sin6_flowinfo = np->flow_label;
 549                 BPF_CGROUP_RUN_SA_PROG(sk, (struct sockaddr *)sin,
 550                                        CGROUP_INET6_GETPEERNAME);
 551         } else {
 552                 if (ipv6_addr_any(&sk->sk_v6_rcv_saddr))
 553                         sin->sin6_addr = np->saddr;
 554                 else
 555                         sin->sin6_addr = sk->sk_v6_rcv_saddr;
 556                 sin->sin6_port = inet->inet_sport;
 557                 BPF_CGROUP_RUN_SA_PROG(sk, (struct sockaddr *)sin,
 558                                        CGROUP_INET6_GETSOCKNAME);
 559         }
 560         sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
 561                                                  sk->sk_bound_dev_if);
 562         release_sock(sk);
 563         return sizeof(*sin);
 564 }
 565 EXPORT_SYMBOL(inet6_getname);
 566
 567 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 568 {
 569         void __user *argp = (void __user *)arg;
 570         struct sock *sk = sock->sk;
 571         struct net *net = sock_net(sk);
 572
 573         switch (cmd) {
 574         case SIOCADDRT:
 575         case SIOCDELRT: {
 576                 struct in6_rtmsg rtmsg;
 577
 578                 if (copy_from_user(&rtmsg, argp, sizeof(rtmsg)))
 579                         return -EFAULT;
 580                 return ipv6_route_ioctl(net, cmd, &rtmsg);
 581         }
 582         case SIOCSIFADDR:
 583                 return addrconf_add_ifaddr(net, argp);
 584         case SIOCDIFADDR:
 585                 return addrconf_del_ifaddr(net, argp);
 586         case SIOCSIFDSTADDR:
 587                 return addrconf_set_dstaddr(net, argp);
 588         default:
 589                 if (!sk->sk_prot->ioctl)
 590                         return -ENOIOCTLCMD;
 591                 return sk->sk_prot->ioctl(sk, cmd, arg);
 592         }
 593         /*NOTREACHED*/
 594         return 0;
 595 }
 596 EXPORT_SYMBOL(inet6_ioctl);
 597
 598 #ifdef CONFIG_COMPAT
 599 struct compat_in6_rtmsg {
 600         struct in6_addr         rtmsg_dst;
 601         struct in6_addr         rtmsg_src;
 602         struct in6_addr         rtmsg_gateway;
 603         u32                     rtmsg_type;
 604         u16                     rtmsg_dst_len;
 605         u16                     rtmsg_src_len;
 606         u32                     rtmsg_metric;
 607         u32                     rtmsg_info;
 608         u32                     rtmsg_flags;
 609         s32                     rtmsg_ifindex;
 610 };
 611
 612 static int inet6_compat_routing_ioctl(struct sock *sk, unsigned int cmd,
 613                 struct compat_in6_rtmsg __user *ur)
 614 {
 615         struct in6_rtmsg rt;
 616
 617         if (copy_from_user(&rt.rtmsg_dst, &ur->rtmsg_dst,
 618                         3 * sizeof(struct in6_addr)) ||
 619             get_user(rt.rtmsg_type, &ur->rtmsg_type) ||
 620             get_user(rt.rtmsg_dst_len, &ur->rtmsg_dst_len) ||
 621             get_user(rt.rtmsg_src_len, &ur->rtmsg_src_len) ||
 622             get_user(rt.rtmsg_metric, &ur->rtmsg_metric) ||
 623             get_user(rt.rtmsg_info, &ur->rtmsg_info) ||
 624             get_user(rt.rtmsg_flags, &ur->rtmsg_flags) ||
 625             get_user(rt.rtmsg_ifindex, &ur->rtmsg_ifindex))
 626                 return -EFAULT;
 627
 628
 629         return ipv6_route_ioctl(sock_net(sk), cmd, &rt);
 630 }
 631
 632 int inet6_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 633 {
 634         void __user *argp = compat_ptr(arg);
 635         struct sock *sk = sock->sk;
 636
 637         switch (cmd) {
 638         case SIOCADDRT:
 639         case SIOCDELRT:
 640                 return inet6_compat_routing_ioctl(sk, cmd, argp);
 641         default:
 642                 return -ENOIOCTLCMD;
 643         }
 644 }
 645 EXPORT_SYMBOL_GPL(inet6_compat_ioctl);
 646 #endif /* CONFIG_COMPAT */
 647
 648 INDIRECT_CALLABLE_DECLARE(int udpv6_sendmsg(struct sock *, struct msghdr *,
 649                                             size_t));
 650 int inet6_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
 651 {
 652         struct sock *sk = sock->sk;
 653
 654         if (unlikely(inet_send_prepare(sk)))
 655                 return -EAGAIN;
 656
 657         return INDIRECT_CALL_2(sk->sk_prot->sendmsg, tcp_sendmsg, udpv6_sendmsg,
 658                                sk, msg, size);
 659 }
 660
 661 INDIRECT_CALLABLE_DECLARE(int udpv6_recvmsg(struct sock *, struct msghdr *,
 662                                             size_t, int, int, int *));
 663 int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
 664                   int flags)
 665 {
 666         struct sock *sk = sock->sk;
 667         int addr_len = 0;
 668         int err;
 669
 670         if (likely(!(flags & MSG_ERRQUEUE)))
 671                 sock_rps_record_flow(sk);
 672
 673         err = INDIRECT_CALL_2(sk->sk_prot->recvmsg, tcp_recvmsg, udpv6_recvmsg,
 674                               sk, msg, size, flags & MSG_DONTWAIT,
 675                               flags & ~MSG_DONTWAIT, &addr_len);
 676         if (err >= 0)
 677                 msg->msg_namelen = addr_len;
 678         return err;
 679 }
 680
 681 const struct proto_ops inet6_stream_ops = {
 682         .family            = PF_INET6,
 683         .owner             = THIS_MODULE,
 684         .release           = inet6_release,
 685         .bind              = inet6_bind,
 686         .connect           = inet_stream_connect,       /* ok           */
 687         .socketpair        = sock_no_socketpair,        /* a do nothing */
 688         .accept            = inet_accept,               /* ok           */
 689         .getname           = inet6_getname,
 690         .poll              = tcp_poll,                  /* ok           */
 691         .ioctl             = inet6_ioctl,               /* must change  */
 692         .gettstamp         = sock_gettstamp,
 693         .listen            = inet_listen,               /* ok           */
 694         .shutdown          = inet_shutdown,             /* ok           */
 695         .setsockopt        = sock_common_setsockopt,    /* ok           */
 696         .getsockopt        = sock_common_getsockopt,    /* ok           */
 697         .sendmsg           = inet6_sendmsg,             /* retpoline's sake */
 698         .recvmsg           = inet6_recvmsg,             /* retpoline's sake */
 699 #ifdef CONFIG_MMU
 700         .mmap              = tcp_mmap,
 701 #endif
 702         .sendpage          = inet_sendpage,
 703         .sendmsg_locked    = tcp_sendmsg_locked,
 704         .sendpage_locked   = tcp_sendpage_locked,
 705         .splice_read       = tcp_splice_read,
 706         .read_sock         = tcp_read_sock,
 707         .peek_len          = tcp_peek_len,
 708 #ifdef CONFIG_COMPAT
 709         .compat_ioctl      = inet6_compat_ioctl,
 710 #endif
 711         .set_rcvlowat      = tcp_set_rcvlowat,
 712 };
 713
 714 const struct proto_ops inet6_dgram_ops = {
 715         .family            = PF_INET6,
 716         .owner             = THIS_MODULE,
 717         .release           = inet6_release,
 718         .bind              = inet6_bind,
 719         .connect           = inet_dgram_connect,        /* ok           */
 720         .socketpair        = sock_no_socketpair,        /* a do nothing */
 721         .accept            = sock_no_accept,            /* a do nothing */
 722         .getname           = inet6_getname,
 723         .poll              = udp_poll,                  /* ok           */
 724         .ioctl             = inet6_ioctl,               /* must change  */
 725         .gettstamp         = sock_gettstamp,
 726         .listen            = sock_no_listen,            /* ok           */
 727         .shutdown          = inet_shutdown,             /* ok           */
 728         .setsockopt        = sock_common_setsockopt,    /* ok           */
 729         .getsockopt        = sock_common_getsockopt,    /* ok           */
 730         .sendmsg           = inet6_sendmsg,             /* retpoline's sake */
 731         .recvmsg           = inet6_recvmsg,             /* retpoline's sake */
 732         .read_sock         = udp_read_sock,
 733         .mmap              = sock_no_mmap,
 734         .sendpage          = sock_no_sendpage,
 735         .set_peek_off      = sk_set_peek_off,
 736 #ifdef CONFIG_COMPAT
 737         .compat_ioctl      = inet6_compat_ioctl,
 738 #endif
 739 };
 740
 741 static const struct net_proto_family inet6_family_ops = {
 742         .family = PF_INET6,
 743         .create = inet6_create,
 744         .owner  = THIS_MODULE,
 745 };
 746
 747 int inet6_register_protosw(struct inet_protosw *p)
 748 {
 749         struct list_head *lh;
 750         struct inet_protosw *answer;
 751         struct list_head *last_perm;
 752         int protocol = p->protocol;
 753         int ret;
 754
 755         spin_lock_bh(&inetsw6_lock);
 756
 757         ret = -EINVAL;
 758         if (p->type >= SOCK_MAX)
 759                 goto out_illegal;
 760
 761         /* If we are trying to override a permanent protocol, bail. */
 762         answer = NULL;
 763         ret = -EPERM;
 764         last_perm = &inetsw6[p->type];
 765         list_for_each(lh, &inetsw6[p->type]) {
 766                 answer = list_entry(lh, struct inet_protosw, list);
 767
 768                 /* Check only the non-wild match. */
 769                 if (INET_PROTOSW_PERMANENT & answer->flags) {
 770                         if (protocol == answer->protocol)
 771                                 break;
 772                         last_perm = lh;
 773                 }
 774
 775                 answer = NULL;
 776         }
 777         if (answer)
 778                 goto out_permanent;
 779
 780         /* Add the new entry after the last permanent entry if any, so that
 781          * the new entry does not override a permanent entry when matched with
 782          * a wild-card protocol. But it is allowed to override any existing
 783          * non-permanent entry.  This means that when we remove this entry, the
 784          * system automatically returns to the old behavior.
 785          */
 786         list_add_rcu(&p->list, last_perm);
 787         ret = 0;
 788 out:
 789         spin_unlock_bh(&inetsw6_lock);
 790         return ret;
 791
 792 out_permanent:
 793         pr_err("Attempt to override permanent protocol %d\n", protocol);
 794         goto out;
 795
 796 out_illegal:
 797         pr_err("Ignoring attempt to register invalid socket type %d\n",
 798                p->type);
 799         goto out;
 800 }
 801 EXPORT_SYMBOL(inet6_register_protosw);
 802
 803 void
 804 inet6_unregister_protosw(struct inet_protosw *p)
 805 {
 806         if (INET_PROTOSW_PERMANENT & p->flags) {
 807                 pr_err("Attempt to unregister permanent protocol %d\n",
 808                        p->protocol);
 809         } else {
 810                 spin_lock_bh(&inetsw6_lock);
 811                 list_del_rcu(&p->list);
 812                 spin_unlock_bh(&inetsw6_lock);
 813
 814                 synchronize_net();
 815         }
 816 }
 817 EXPORT_SYMBOL(inet6_unregister_protosw);
 818
 819 int inet6_sk_rebuild_header(struct sock *sk)
 820 {
 821         struct ipv6_pinfo *np = inet6_sk(sk);
 822         struct dst_entry *dst;
 823
 824         dst = __sk_dst_check(sk, np->dst_cookie);
 825
 826         if (!dst) {
 827                 struct inet_sock *inet = inet_sk(sk);
 828                 struct in6_addr *final_p, final;
 829                 struct flowi6 fl6;
 830
 831                 memset(&fl6, 0, sizeof(fl6));
 832                 fl6.flowi6_proto = sk->sk_protocol;
 833                 fl6.daddr = sk->sk_v6_daddr;
 834                 fl6.saddr = np->saddr;
 835                 fl6.flowlabel = np->flow_label;
 836                 fl6.flowi6_oif = sk->sk_bound_dev_if;
 837                 fl6.flowi6_mark = sk->sk_mark;
 838                 fl6.fl6_dport = inet->inet_dport;
 839                 fl6.fl6_sport = inet->inet_sport;
 840                 fl6.flowi6_uid = sk->sk_uid;
 841                 security_sk_classify_flow(sk, flowi6_to_flowi_common(&fl6));
 842
 843                 rcu_read_lock();
 844                 final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt),
 845                                          &final);
 846                 rcu_read_unlock();
 847
 848                 dst = ip6_dst_lookup_flow(sock_net(sk), sk, &fl6, final_p);
 849                 if (IS_ERR(dst)) {
 850                         sk->sk_route_caps = 0;
 851                         sk->sk_err_soft = -PTR_ERR(dst);
 852                         return PTR_ERR(dst);
 853                 }
 854
 855                 ip6_dst_store(sk, dst, NULL, NULL);
 856         }
 857
 858         return 0;
 859 }
 860 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
 861
 862 bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb,
 863                        const struct inet6_skb_parm *opt)
 864 {
 865         const struct ipv6_pinfo *np = inet6_sk(sk);
 866
 867         if (np->rxopt.all) {
 868                 if (((opt->flags & IP6SKB_HOPBYHOP) &&
 869                      (np->rxopt.bits.hopopts || np->rxopt.bits.ohopopts)) ||
 870                     (ip6_flowinfo((struct ipv6hdr *) skb_network_header(skb)) &&
 871                      np->rxopt.bits.rxflow) ||
 872                     (opt->srcrt && (np->rxopt.bits.srcrt ||
 873                      np->rxopt.bits.osrcrt)) ||
 874                     ((opt->dst1 || opt->dst0) &&
 875                      (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
 876                         return true;
 877         }
 878         return false;
 879 }
 880 EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
 881
 882 static struct packet_type ipv6_packet_type __read_mostly = {
 883         .type = cpu_to_be16(ETH_P_IPV6),
 884         .func = ipv6_rcv,
 885         .list_func = ipv6_list_rcv,
 886 };
 887
 888 static int __init ipv6_packet_init(void)
 889 {
 890         dev_add_pack(&ipv6_packet_type);
 891         return 0;
 892 }
 893
 894 static void ipv6_packet_cleanup(void)
 895 {
 896         dev_remove_pack(&ipv6_packet_type);
 897 }
 898
 899 static int __net_init ipv6_init_mibs(struct net *net)
 900 {
 901         int i;
 902
 903         net->mib.udp_stats_in6 = alloc_percpu(struct udp_mib);
 904         if (!net->mib.udp_stats_in6)
 905                 return -ENOMEM;
 906         net->mib.udplite_stats_in6 = alloc_percpu(struct udp_mib);
 907         if (!net->mib.udplite_stats_in6)
 908                 goto err_udplite_mib;
 909         net->mib.ipv6_statistics = alloc_percpu(struct ipstats_mib);
 910         if (!net->mib.ipv6_statistics)
 911                 goto err_ip_mib;
 912
 913         for_each_possible_cpu(i) {
 914                 struct ipstats_mib *af_inet6_stats;
 915                 af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics, i);
 916                 u64_stats_init(&af_inet6_stats->syncp);
 917         }
 918
 919
 920         net->mib.icmpv6_statistics = alloc_percpu(struct icmpv6_mib);
 921         if (!net->mib.icmpv6_statistics)
 922                 goto err_icmp_mib;
 923         net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib),
 924                                                 GFP_KERNEL);
 925         if (!net->mib.icmpv6msg_statistics)
 926                 goto err_icmpmsg_mib;
 927         return 0;
 928
 929 err_icmpmsg_mib:
 930         free_percpu(net->mib.icmpv6_statistics);
 931 err_icmp_mib:
 932         free_percpu(net->mib.ipv6_statistics);
 933 err_ip_mib:
 934         free_percpu(net->mib.udplite_stats_in6);
 935 err_udplite_mib:
 936         free_percpu(net->mib.udp_stats_in6);
 937         return -ENOMEM;
 938 }
 939
 940 static void ipv6_cleanup_mibs(struct net *net)
 941 {
 942         free_percpu(net->mib.udp_stats_in6);
 943         free_percpu(net->mib.udplite_stats_in6);
 944         free_percpu(net->mib.ipv6_statistics);
 945         free_percpu(net->mib.icmpv6_statistics);
 946         kfree(net->mib.icmpv6msg_statistics);
 947 }
 948
 949 static int __net_init inet6_net_init(struct net *net)
 950 {
 951         int err = 0;
 952
 953         net->ipv6.sysctl.bindv6only = 0;
 954         net->ipv6.sysctl.icmpv6_time = 1*HZ;
 955         net->ipv6.sysctl.icmpv6_echo_ignore_all = 0;
 956         net->ipv6.sysctl.icmpv6_echo_ignore_multicast = 0;
 957         net->ipv6.sysctl.icmpv6_echo_ignore_anycast = 0;
 958
 959         /* By default, rate limit error messages.
 960          * Except for pmtu discovery, it would break it.
 961          * proc_do_large_bitmap needs pointer to the bitmap.
 962          */
 963         bitmap_set(net->ipv6.sysctl.icmpv6_ratemask, 0, ICMPV6_ERRMSG_MAX + 1);
 964         bitmap_clear(net->ipv6.sysctl.icmpv6_ratemask, ICMPV6_PKT_TOOBIG, 1);
 965         net->ipv6.sysctl.icmpv6_ratemask_ptr = net->ipv6.sysctl.icmpv6_ratemask;
 966
 967         net->ipv6.sysctl.flowlabel_consistency = 1;
 968         net->ipv6.sysctl.auto_flowlabels = IP6_DEFAULT_AUTO_FLOW_LABELS;
 969         net->ipv6.sysctl.idgen_retries = 3;
 970         net->ipv6.sysctl.idgen_delay = 1 * HZ;
 971         net->ipv6.sysctl.flowlabel_state_ranges = 0;
 972         net->ipv6.sysctl.max_dst_opts_cnt = IP6_DEFAULT_MAX_DST_OPTS_CNT;
 973         net->ipv6.sysctl.max_hbh_opts_cnt = IP6_DEFAULT_MAX_HBH_OPTS_CNT;
 974         net->ipv6.sysctl.max_dst_opts_len = IP6_DEFAULT_MAX_DST_OPTS_LEN;
 975         net->ipv6.sysctl.max_hbh_opts_len = IP6_DEFAULT_MAX_HBH_OPTS_LEN;
 976         net->ipv6.sysctl.fib_notify_on_flag_change = 0;
 977         atomic_set(&net->ipv6.fib6_sernum, 1);
 978
 979         net->ipv6.sysctl.ioam6_id = IOAM6_DEFAULT_ID;
 980         net->ipv6.sysctl.ioam6_id_wide = IOAM6_DEFAULT_ID_WIDE;
 981
 982         err = ipv6_init_mibs(net);
 983         if (err)
 984                 return err;
 985 #ifdef CONFIG_PROC_FS
 986         err = udp6_proc_init(net);
 987         if (err)
 988                 goto out;
 989         err = tcp6_proc_init(net);
 990         if (err)
 991                 goto proc_tcp6_fail;
 992         err = ac6_proc_init(net);
 993         if (err)
 994                 goto proc_ac6_fail;
 995 #endif
 996         return err;
 997
 998 #ifdef CONFIG_PROC_FS
 999 proc_ac6_fail:
1000         tcp6_proc_exit(net);
1001 proc_tcp6_fail:
1002         udp6_proc_exit(net);
1003 out:
1004         ipv6_cleanup_mibs(net);
1005         return err;
1006 #endif
1007 }
1008
1009 static void __net_exit inet6_net_exit(struct net *net)
1010 {
1011 #ifdef CONFIG_PROC_FS
1012         udp6_proc_exit(net);
1013         tcp6_proc_exit(net);
1014         ac6_proc_exit(net);
1015 #endif
1016         ipv6_cleanup_mibs(net);
1017 }
1018
1019 static struct pernet_operations inet6_net_ops = {
1020         .init = inet6_net_init,
1021         .exit = inet6_net_exit,
1022 };
1023
1024 static int ipv6_route_input(struct sk_buff *skb)
1025 {
1026         ip6_route_input(skb);
1027         return skb_dst(skb)->error;
1028 }
1029
1030 static const struct ipv6_stub ipv6_stub_impl = {
1031         .ipv6_sock_mc_join = ipv6_sock_mc_join,
1032         .ipv6_sock_mc_drop = ipv6_sock_mc_drop,
1033         .ipv6_dst_lookup_flow = ip6_dst_lookup_flow,
1034         .ipv6_route_input  = ipv6_route_input,
1035         .fib6_get_table    = fib6_get_table,
1036         .fib6_table_lookup = fib6_table_lookup,
1037         .fib6_lookup       = fib6_lookup,
1038         .fib6_select_path  = fib6_select_path,
1039         .ip6_mtu_from_fib6 = ip6_mtu_from_fib6,
1040         .fib6_nh_init      = fib6_nh_init,
1041         .fib6_nh_release   = fib6_nh_release,
1042         .fib6_nh_release_dsts = fib6_nh_release_dsts,
1043         .fib6_update_sernum = fib6_update_sernum_stub,
1044         .fib6_rt_update    = fib6_rt_update,
1045         .ip6_del_rt        = ip6_del_rt,
1046         .udpv6_encap_enable = udpv6_encap_enable,
1047         .ndisc_send_na = ndisc_send_na,
1048 #if IS_ENABLED(CONFIG_XFRM)
1049         .xfrm6_local_rxpmtu = xfrm6_local_rxpmtu,
1050         .xfrm6_udp_encap_rcv = xfrm6_udp_encap_rcv,
1051         .xfrm6_rcv_encap = xfrm6_rcv_encap,
1052 #endif
1053         .nd_tbl = &nd_tbl,
1054         .ipv6_fragment = ip6_fragment,
1055         .ipv6_dev_find = ipv6_dev_find,
1056 };
1057
1058 static const struct ipv6_bpf_stub ipv6_bpf_stub_impl = {
1059         .inet6_bind = __inet6_bind,
1060         .udp6_lib_lookup = __udp6_lib_lookup,
1061 };
1062
1063 static int __init inet6_init(void)
1064 {
1065         struct list_head *r;
1066         int err = 0;
1067
1068         sock_skb_cb_check_size(sizeof(struct inet6_skb_parm));
1069
1070         /* Register the socket-side information for inet6_create.  */
1071         for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
1072                 INIT_LIST_HEAD(r);
1073
1074         if (disable_ipv6_mod) {
1075                 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
1076                 goto out;
1077         }
1078
1079         err = proto_register(&tcpv6_prot, 1);
1080         if (err)
1081                 goto out;
1082
1083         err = proto_register(&udpv6_prot, 1);
1084         if (err)
1085                 goto out_unregister_tcp_proto;
1086
1087         err = proto_register(&udplitev6_prot, 1);
1088         if (err)
1089                 goto out_unregister_udp_proto;
1090
1091         err = proto_register(&rawv6_prot, 1);
1092         if (err)
1093                 goto out_unregister_udplite_proto;
1094
1095         err = proto_register(&pingv6_prot, 1);
1096         if (err)
1097                 goto out_unregister_raw_proto;
1098
1099         /* We MUST register RAW sockets before we create the ICMP6,
1100          * IGMP6, or NDISC control sockets.
1101          */
1102         err = rawv6_init();
1103         if (err)
1104                 goto out_unregister_ping_proto;
1105
1106         /* Register the family here so that the init calls below will
1107          * be able to create sockets. (?? is this dangerous ??)
1108          */
1109         err = sock_register(&inet6_family_ops);
1110         if (err)
1111                 goto out_sock_register_fail;
1112
1113         /*
1114          *      ipngwg API draft makes clear that the correct semantics
1115          *      for TCP and UDP is to consider one TCP and UDP instance
1116          *      in a host available by both INET and INET6 APIs and
1117          *      able to communicate via both network protocols.
1118          */
1119
1120         err = register_pernet_subsys(&inet6_net_ops);
1121         if (err)
1122                 goto register_pernet_fail;
1123         err = ip6_mr_init();
1124         if (err)
1125                 goto ipmr_fail;
1126         err = icmpv6_init();
1127         if (err)
1128                 goto icmp_fail;
1129         err = ndisc_init();
1130         if (err)
1131                 goto ndisc_fail;
1132         err = igmp6_init();
1133         if (err)
1134                 goto igmp_fail;
1135
1136         err = ipv6_netfilter_init();
1137         if (err)
1138                 goto netfilter_fail;
1139         /* Create /proc/foo6 entries. */
1140 #ifdef CONFIG_PROC_FS
1141         err = -ENOMEM;
1142         if (raw6_proc_init())
1143                 goto proc_raw6_fail;
1144         if (udplite6_proc_init())
1145                 goto proc_udplite6_fail;
1146         if (ipv6_misc_proc_init())
1147                 goto proc_misc6_fail;
1148         if (if6_proc_init())
1149                 goto proc_if6_fail;
1150 #endif
1151         err = ip6_route_init();
1152         if (err)
1153                 goto ip6_route_fail;
1154         err = ndisc_late_init();
1155         if (err)
1156                 goto ndisc_late_fail;
1157         err = ip6_flowlabel_init();
1158         if (err)
1159                 goto ip6_flowlabel_fail;
1160         err = ipv6_anycast_init();
1161         if (err)
1162                 goto ipv6_anycast_fail;
1163         err = addrconf_init();
1164         if (err)
1165                 goto addrconf_fail;
1166
1167         /* Init v6 extension headers. */
1168         err = ipv6_exthdrs_init();
1169         if (err)
1170                 goto ipv6_exthdrs_fail;
1171
1172         err = ipv6_frag_init();
1173         if (err)
1174                 goto ipv6_frag_fail;
1175
1176         /* Init v6 transport protocols. */
1177         err = udpv6_init();
1178         if (err)
1179                 goto udpv6_fail;
1180
1181         err = udplitev6_init();
1182         if (err)
1183                 goto udplitev6_fail;
1184
1185         err = udpv6_offload_init();
1186         if (err)
1187                 goto udpv6_offload_fail;
1188
1189         err = tcpv6_init();
1190         if (err)
1191                 goto tcpv6_fail;
1192
1193         err = ipv6_packet_init();
1194         if (err)
1195                 goto ipv6_packet_fail;
1196
1197         err = pingv6_init();
1198         if (err)
1199                 goto pingv6_fail;
1200
1201         err = calipso_init();
1202         if (err)
1203                 goto calipso_fail;
1204
1205         err = seg6_init();
1206         if (err)
1207                 goto seg6_fail;
1208
1209         err = rpl_init();
1210         if (err)
1211                 goto rpl_fail;
1212
1213         err = ioam6_init();
1214         if (err)
1215                 goto ioam6_fail;
1216
1217         err = igmp6_late_init();
1218         if (err)
1219                 goto igmp6_late_err;
1220
1221 #ifdef CONFIG_SYSCTL
1222         err = ipv6_sysctl_register();
1223         if (err)
1224                 goto sysctl_fail;
1225 #endif
1226
1227         /* ensure that ipv6 stubs are visible only after ipv6 is ready */
1228         wmb();
1229         ipv6_stub = &ipv6_stub_impl;
1230         ipv6_bpf_stub = &ipv6_bpf_stub_impl;
1231 out:
1232         return err;
1233
1234 #ifdef CONFIG_SYSCTL
1235 sysctl_fail:
1236         igmp6_late_cleanup();
1237 #endif
1238 igmp6_late_err:
1239         ioam6_exit();
1240 ioam6_fail:
1241         rpl_exit();
1242 rpl_fail:
1243         seg6_exit();
1244 seg6_fail:
1245         calipso_exit();
1246 calipso_fail:
1247         pingv6_exit();
1248 pingv6_fail:
1249         ipv6_packet_cleanup();
1250 ipv6_packet_fail:
1251         tcpv6_exit();
1252 tcpv6_fail:
1253         udpv6_offload_exit();
1254 udpv6_offload_fail:
1255         udplitev6_exit();
1256 udplitev6_fail:
1257         udpv6_exit();
1258 udpv6_fail:
1259         ipv6_frag_exit();
1260 ipv6_frag_fail:
1261         ipv6_exthdrs_exit();
1262 ipv6_exthdrs_fail:
1263         addrconf_cleanup();
1264 addrconf_fail:
1265         ipv6_anycast_cleanup();
1266 ipv6_anycast_fail:
1267         ip6_flowlabel_cleanup();
1268 ip6_flowlabel_fail:
1269         ndisc_late_cleanup();
1270 ndisc_late_fail:
1271         ip6_route_cleanup();
1272 ip6_route_fail:
1273 #ifdef CONFIG_PROC_FS
1274         if6_proc_exit();
1275 proc_if6_fail:
1276         ipv6_misc_proc_exit();
1277 proc_misc6_fail:
1278         udplite6_proc_exit();
1279 proc_udplite6_fail:
1280         raw6_proc_exit();
1281 proc_raw6_fail:
1282 #endif
1283         ipv6_netfilter_fini();
1284 netfilter_fail:
1285         igmp6_cleanup();
1286 igmp_fail:
1287         ndisc_cleanup();
1288 ndisc_fail:
1289         icmpv6_cleanup();
1290 icmp_fail:
1291         ip6_mr_cleanup();
1292 ipmr_fail:
1293         unregister_pernet_subsys(&inet6_net_ops);
1294 register_pernet_fail:
1295         sock_unregister(PF_INET6);
1296         rtnl_unregister_all(PF_INET6);
1297 out_sock_register_fail:
1298         rawv6_exit();
1299 out_unregister_ping_proto:
1300         proto_unregister(&pingv6_prot);
1301 out_unregister_raw_proto:
1302         proto_unregister(&rawv6_prot);
1303 out_unregister_udplite_proto:
1304         proto_unregister(&udplitev6_prot);
1305 out_unregister_udp_proto:
1306         proto_unregister(&udpv6_prot);
1307 out_unregister_tcp_proto:
1308         proto_unregister(&tcpv6_prot);
1309         goto out;
1310 }
1311 module_init(inet6_init);
1312
1313 MODULE_ALIAS_NETPROTO(PF_INET6);