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