projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge branch 'irq-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
[GitHub/LineageOS/android_kernel_motorola_exynos9610.git] / net / ipv6 / af_inet6.c
CommitLineData
1da177e4
LT		 1/*
2 * PF_INET6 socket protocol family
1ab1457c 3 * Linux INET6 implementation
1da177e4
LT		 4 *
5 * Authors:
1ab1457c 6 * Pedro Roque <roque@di.fc.ul.pt>
1da177e4
LT		 7 *
8 * Adapted from linux/net/ipv4/af_inet.c
9 *
1da177e4
LT		 10 * Fixes:
11 * piggy, Karl Knutson : Socket protocol table
12 * Hideaki YOSHIFUJI : sin6_scope_id support
13 * Arnaldo Melo : check proc_net_create return, cleanups
14 *
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * as published by the Free Software Foundation; either version
18 * 2 of the License, or (at your option) any later version.
19 */
20
21
22#include <linux/module.h>
4fc268d2 23#include <linux/capability.h>
1da177e4
LT		 24#include <linux/errno.h>
25#include <linux/types.h>
26#include <linux/socket.h>
27#include <linux/in.h>
28#include <linux/kernel.h>
1da177e4
LT		 29#include <linux/timer.h>
30#include <linux/string.h>
31#include <linux/sockios.h>
32#include <linux/net.h>
33#include <linux/fcntl.h>
34#include <linux/mm.h>
35#include <linux/interrupt.h>
36#include <linux/proc_fs.h>
37#include <linux/stat.h>
38#include <linux/init.h>
5a0e3ad6 39#include <linux/slab.h>
1da177e4
LT		 40
41#include <linux/inet.h>
42#include <linux/netdevice.h>
43#include <linux/icmpv6.h>
2cc7d573 44#include <linux/netfilter_ipv6.h>
1da177e4
LT		 45
46#include <net/ip.h>
47#include <net/ipv6.h>
48#include <net/udp.h>
ba4e58ec 49#include <net/udplite.h>
1da177e4
LT		 50#include <net/tcp.h>
51#include <net/ipip.h>
52#include <net/protocol.h>
53#include <net/inet_common.h>
1668e010 54#include <net/route.h>
1da177e4
LT		 55#include <net/transp_v6.h>
56#include <net/ip6_route.h>
57#include <net/addrconf.h>
58#ifdef CONFIG_IPV6_TUNNEL
59#include <net/ip6_tunnel.h>
60#endif
61
62#include <asm/uaccess.h>
63#include <asm/system.h>
7bc570c8 64#include <linux/mroute6.h>
1da177e4
LT		 65
66MODULE_AUTHOR("Cast of dozens");
67MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
68MODULE_LICENSE("GPL");
69
f1267347 70/* The inetsw6 table contains everything that inet6_create needs to
1da177e4
LT		 71 * build a new socket.
72 */
73static struct list_head inetsw6[SOCK_MAX];
74static DEFINE_SPINLOCK(inetsw6_lock);
75
56d417b1
BH		 76struct ipv6_params ipv6_defaults = {
77 .disable_ipv6 = 0,
78 .autoconf = 1,
79};
80
81static int disable_ipv6_mod = 0;
82
83module_param_named(disable, disable_ipv6_mod, int, 0444);
84MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional");
85
86module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444);
87MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces");
88
89module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444);
90MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces");
fe7ca2e1 91
1da177e4
LT		 92static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
93{
94 const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
95
96 return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
97}
98
3f378b68
EP		 99static int inet6_create(struct net *net, struct socket *sock, int protocol,
100 int kern)
1da177e4
LT		 101{
102 struct inet_sock *inet;
103 struct ipv6_pinfo *np;
104 struct sock *sk;
1da177e4
LT		 105 struct inet_protosw *answer;
106 struct proto *answer_prot;
107 unsigned char answer_flags;
108 char answer_no_check;
af1afe86
YH		 109 int try_loading_module = 0;
110 int err;
1da177e4 111
b3da2cf3
DM		 112 if (sock->type != SOCK_RAW &&
113 sock->type != SOCK_DGRAM &&
114 !inet_ehash_secret)
115 build_ehash_secret();
116
1da177e4 117 /* Look for the requested type/protocol pair. */
af1afe86
YH		 118lookup_protocol:
119 err = -ESOCKTNOSUPPORT;
1da177e4 120 rcu_read_lock();
696adfe8 121 list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
1da177e4 122
696adfe8 123 err = 0;
1da177e4
LT		 124 /* Check the non-wild match. */
125 if (protocol == answer->protocol) {
126 if (protocol != IPPROTO_IP)
127 break;
128 } else {
129 /* Check for the two wild cases. */
130 if (IPPROTO_IP == protocol) {
131 protocol = answer->protocol;
132 break;
133 }
134 if (IPPROTO_IP == answer->protocol)
135 break;
136 }
af1afe86 137 err = -EPROTONOSUPPORT;
1da177e4
LT		 138 }
139
696adfe8 140 if (err) {
af1afe86
YH		 141 if (try_loading_module < 2) {
142 rcu_read_unlock();
143 /*
144 * Be more specific, e.g. net-pf-10-proto-132-type-1
145 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
146 */
147 if (++try_loading_module == 1)
148 request_module("net-pf-%d-proto-%d-type-%d",
149 PF_INET6, protocol, sock->type);
150 /*
151 * Fall back to generic, e.g. net-pf-10-proto-132
152 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
153 */
154 else
155 request_module("net-pf-%d-proto-%d",
156 PF_INET6, protocol);
157 goto lookup_protocol;
158 } else
159 goto out_rcu_unlock;
160 }
161
162 err = -EPERM;
c84b3268 163 if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW))
1da177e4 164 goto out_rcu_unlock;
1da177e4
LT		 165
166 sock->ops = answer->ops;
1da177e4
LT		 167 answer_prot = answer->prot;
168 answer_no_check = answer->no_check;
169 answer_flags = answer->flags;
170 rcu_read_unlock();
171
547b792c 172 WARN_ON(answer_prot->slab == NULL);
1da177e4 173
af1afe86 174 err = -ENOBUFS;
6257ff21 175 sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot);
1da177e4
LT		 176 if (sk == NULL)
177 goto out;
178
179 sock_init_data(sock, sk);
180
af1afe86 181 err = 0;
1da177e4
LT		 182 sk->sk_no_check = answer_no_check;
183 if (INET_PROTOSW_REUSE & answer_flags)
184 sk->sk_reuse = 1;
185
186 inet = inet_sk(sk);
469de9b9 187 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
1da177e4
LT		 188
189 if (SOCK_RAW == sock->type) {
c720c7e8 190 inet->inet_num = protocol;
1da177e4
LT		 191 if (IPPROTO_RAW == protocol)
192 inet->hdrincl = 1;
193 }
194
e6848976 195 sk->sk_destruct = inet_sock_destruct;
1da177e4
LT		 196 sk->sk_family = PF_INET6;
197 sk->sk_protocol = protocol;
198
199 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
200
201 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
202 np->hop_limit = -1;
f935aa9e 203 np->mcast_hops = IPV6_DEFAULT_MCASTHOPS;
1da177e4
LT		 204 np->mc_loop = 1;
205 np->pmtudisc = IPV6_PMTUDISC_WANT;
2e761e05 206 np->ipv6only = net->ipv6.sysctl.bindv6only;
1ab1457c 207
1da177e4
LT		 208 /* Init the ipv4 part of the socket since we can have sockets
209 * using v6 API for ipv4.
210 */
211 inet->uc_ttl = -1;
212
213 inet->mc_loop = 1;
214 inet->mc_ttl = 1;
215 inet->mc_index = 0;
216 inet->mc_list = NULL;
217
218 if (ipv4_config.no_pmtu_disc)
219 inet->pmtudisc = IP_PMTUDISC_DONT;
220 else
221 inet->pmtudisc = IP_PMTUDISC_WANT;
1ab1457c 222 /*
e6848976
ACM		 223 * Increment only the relevant sk_prot->socks debug field, this changes
224 * the previous behaviour of incrementing both the equivalent to
225 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
226 *
227 * This allows better debug granularity as we'll know exactly how many
228 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
229 * transport protocol socks. -acme
230 */
231 sk_refcnt_debug_inc(sk);
1da177e4 232
c720c7e8 233 if (inet->inet_num) {
1da177e4
LT		 234 /* It assumes that any protocol which allows
235 * the user to assign a number at socket
236 * creation time automatically shares.
237 */
c720c7e8 238 inet->inet_sport = htons(inet->inet_num);
1da177e4
LT		 239 sk->sk_prot->hash(sk);
240 }
241 if (sk->sk_prot->init) {
af1afe86
YH		 242 err = sk->sk_prot->init(sk);
243 if (err) {
1da177e4
LT		 244 sk_common_release(sk);
245 goto out;
246 }
247 }
248out:
af1afe86 249 return err;
1da177e4
LT		 250out_rcu_unlock:
251 rcu_read_unlock();
252 goto out;
253}
254
255
256/* bind for INET6 API */
257int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
258{
259 struct sockaddr_in6 *addr=(struct sockaddr_in6 *)uaddr;
260 struct sock *sk = sock->sk;
261 struct inet_sock *inet = inet_sk(sk);
262 struct ipv6_pinfo *np = inet6_sk(sk);
3b1e0a65 263 struct net *net = sock_net(sk);
fd683222 264 __be32 v4addr = 0;
1da177e4
LT		 265 unsigned short snum;
266 int addr_type = 0;
267 int err = 0;
268
269 /* If the socket has its own bind function then use it. */
270 if (sk->sk_prot->bind)
271 return sk->sk_prot->bind(sk, uaddr, addr_len);
272
273 if (addr_len < SIN6_LEN_RFC2133)
274 return -EINVAL;
275 addr_type = ipv6_addr_type(&addr->sin6_addr);
276 if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM)
277 return -EINVAL;
278
279 snum = ntohs(addr->sin6_port);
280 if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
281 return -EACCES;
282
283 lock_sock(sk);
284
285 /* Check these errors (active socket, double bind). */
c720c7e8 286 if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
1da177e4
LT		 287 err = -EINVAL;
288 goto out;
289 }
290
291 /* Check if the address belongs to the host. */
292 if (addr_type == IPV6_ADDR_MAPPED) {
63d9950b
VY		 293 int chk_addr_ret;
294
783ed5a7
VY		 295 /* Binding to v4-mapped address on a v6-only socket
296 * makes no sense
297 */
298 if (np->ipv6only) {
299 err = -EINVAL;
300 goto out;
301 }
63d9950b 302
a34f0b31 303 /* Reproduce AF_INET checks to make the bindings consistent */
1da177e4 304 v4addr = addr->sin6_addr.s6_addr32[3];
63d9950b
VY		 305 chk_addr_ret = inet_addr_type(net, v4addr);
306 if (!sysctl_ip_nonlocal_bind &&
307 !(inet->freebind || inet->transparent) &&
308 v4addr != htonl(INADDR_ANY) &&
309 chk_addr_ret != RTN_LOCAL &&
310 chk_addr_ret != RTN_MULTICAST &&
ca6982b8
BP		 311 chk_addr_ret != RTN_BROADCAST) {
312 err = -EADDRNOTAVAIL;
1da177e4 313 goto out;
ca6982b8 314 }
1da177e4
LT		 315 } else {
316 if (addr_type != IPV6_ADDR_ANY) {
317 struct net_device *dev = NULL;
318
16ba5e8e 319 rcu_read_lock();
1da177e4
LT		 320 if (addr_type & IPV6_ADDR_LINKLOCAL) {
321 if (addr_len >= sizeof(struct sockaddr_in6) &&
322 addr->sin6_scope_id) {
323 /* Override any existing binding, if another one
324 * is supplied by user.
325 */
326 sk->sk_bound_dev_if = addr->sin6_scope_id;
327 }
1ab1457c 328
1da177e4
LT		 329 /* Binding to link-local address requires an interface */
330 if (!sk->sk_bound_dev_if) {
331 err = -EINVAL;
16ba5e8e 332 goto out_unlock;
1da177e4 333 }
16ba5e8e 334 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
1da177e4
LT		 335 if (!dev) {
336 err = -ENODEV;
16ba5e8e 337 goto out_unlock;
1da177e4
LT		 338 }
339 }
340
341 /* ipv4 addr of the socket is invalid. Only the
342 * unspecified and mapped address have a v4 equivalent.
343 */
344 v4addr = LOOPBACK4_IPV6;
345 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
0a513f6a
BS		 346 if (!inet->transparent &&
347 !ipv6_chk_addr(net, &addr->sin6_addr,
bfeade08 348 dev, 0)) {
1da177e4 349 err = -EADDRNOTAVAIL;
16ba5e8e 350 goto out_unlock;
1da177e4
LT		 351 }
352 }
16ba5e8e 353 rcu_read_unlock();
1da177e4
LT		 354 }
355 }
356
c720c7e8
ED		 357 inet->inet_rcv_saddr = v4addr;
358 inet->inet_saddr = v4addr;
1da177e4
LT		 359
360 ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
1ab1457c 361
1da177e4
LT		 362 if (!(addr_type & IPV6_ADDR_MULTICAST))
363 ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
364
365 /* Make sure we are allowed to bind here. */
366 if (sk->sk_prot->get_port(sk, snum)) {
367 inet_reset_saddr(sk);
368 err = -EADDRINUSE;
369 goto out;
370 }
371
0f8d3c7a 372 if (addr_type != IPV6_ADDR_ANY) {
1da177e4 373 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
0f8d3c7a
VY		 374 if (addr_type != IPV6_ADDR_MAPPED)
375 np->ipv6only = 1;
376 }
1da177e4
LT		 377 if (snum)
378 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
c720c7e8
ED		 379 inet->inet_sport = htons(inet->inet_num);
380 inet->inet_dport = 0;
381 inet->inet_daddr = 0;
1da177e4
LT		 382out:
383 release_sock(sk);
384 return err;
16ba5e8e
ED		 385out_unlock:
386 rcu_read_unlock();
387 goto out;
1da177e4
LT		 388}
389
7159039a
YH		 390EXPORT_SYMBOL(inet6_bind);
391
1da177e4
LT		 392int inet6_release(struct socket *sock)
393{
394 struct sock *sk = sock->sk;
395
396 if (sk == NULL)
397 return -EINVAL;
398
399 /* Free mc lists */
400 ipv6_sock_mc_close(sk);
401
402 /* Free ac lists */
403 ipv6_sock_ac_close(sk);
404
405 return inet_release(sock);
406}
407
7159039a
YH		 408EXPORT_SYMBOL(inet6_release);
409
7d06b2e0 410void inet6_destroy_sock(struct sock *sk)
1da177e4
LT		 411{
412 struct ipv6_pinfo *np = inet6_sk(sk);
413 struct sk_buff *skb;
414 struct ipv6_txoptions *opt;
415
1da177e4
LT		 416 /* Release rx options */
417
418 if ((skb = xchg(&np->pktoptions, NULL)) != NULL)
419 kfree_skb(skb);
4b340ae2
BH		 420
421 if ((skb = xchg(&np->rxpmtu, NULL)) != NULL)
422 kfree_skb(skb);
1da177e4
LT		 423
424 /* Free flowlabels */
425 fl6_free_socklist(sk);
426
427 /* Free tx options */
428
429 if ((opt = xchg(&np->opt, NULL)) != NULL)
430 sock_kfree_s(sk, opt, opt->tot_len);
1da177e4
LT		 431}
432
3cf3dc6c
ACM		 433EXPORT_SYMBOL_GPL(inet6_destroy_sock);
434
1da177e4
LT		 435/*
436 * This does both peername and sockname.
437 */
1ab1457c 438
1da177e4
LT		 439int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
440 int *uaddr_len, int peer)
441{
442 struct sockaddr_in6 *sin=(struct sockaddr_in6 *)uaddr;
443 struct sock *sk = sock->sk;
444 struct inet_sock *inet = inet_sk(sk);
445 struct ipv6_pinfo *np = inet6_sk(sk);
1ab1457c 446
1da177e4
LT		 447 sin->sin6_family = AF_INET6;
448 sin->sin6_flowinfo = 0;
449 sin->sin6_scope_id = 0;
450 if (peer) {
c720c7e8 451 if (!inet->inet_dport)
1da177e4
LT		 452 return -ENOTCONN;
453 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
454 peer == 1)
455 return -ENOTCONN;
c720c7e8 456 sin->sin6_port = inet->inet_dport;
1da177e4
LT		 457 ipv6_addr_copy(&sin->sin6_addr, &np->daddr);
458 if (np->sndflow)
459 sin->sin6_flowinfo = np->flow_label;
460 } else {
461 if (ipv6_addr_any(&np->rcv_saddr))
462 ipv6_addr_copy(&sin->sin6_addr, &np->saddr);
463 else
464 ipv6_addr_copy(&sin->sin6_addr, &np->rcv_saddr);
465
c720c7e8 466 sin->sin6_port = inet->inet_sport;
1da177e4
LT		 467 }
468 if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL)
469 sin->sin6_scope_id = sk->sk_bound_dev_if;
470 *uaddr_len = sizeof(*sin);
a02cec21 471 return 0;
1da177e4
LT		 472}
473
7159039a
YH		 474EXPORT_SYMBOL(inet6_getname);
475
1da177e4
LT		 476int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
477{
478 struct sock *sk = sock->sk;
3b1e0a65 479 struct net *net = sock_net(sk);
1da177e4 480
1ab1457c 481 switch(cmd)
1da177e4
LT		 482 {
483 case SIOCGSTAMP:
484 return sock_get_timestamp(sk, (struct timeval __user *)arg);
485
ae40eb1e
ED		 486 case SIOCGSTAMPNS:
487 return sock_get_timestampns(sk, (struct timespec __user *)arg);
488
1da177e4
LT		 489 case SIOCADDRT:
490 case SIOCDELRT:
1ab1457c 491
a02cec21 492 return ipv6_route_ioctl(net, cmd, (void __user *)arg);
1da177e4
LT		 493
494 case SIOCSIFADDR:
af284937 495 return addrconf_add_ifaddr(net, (void __user *) arg);
1da177e4 496 case SIOCDIFADDR:
af284937 497 return addrconf_del_ifaddr(net, (void __user *) arg);
1da177e4 498 case SIOCSIFDSTADDR:
af284937 499 return addrconf_set_dstaddr(net, (void __user *) arg);
1da177e4 500 default:
b5e5fa5e
CH		 501 if (!sk->sk_prot->ioctl)
502 return -ENOIOCTLCMD;
503 return sk->sk_prot->ioctl(sk, cmd, arg);
1da177e4
LT		 504 }
505 /*NOTREACHED*/
a02cec21 506 return 0;
1da177e4
LT		 507}
508
7159039a
YH		 509EXPORT_SYMBOL(inet6_ioctl);
510
90ddc4f0 511const struct proto_ops inet6_stream_ops = {
543d9cfe
ACM		 512 .family = PF_INET6,
513 .owner = THIS_MODULE,
514 .release = inet6_release,
515 .bind = inet6_bind,
516 .connect = inet_stream_connect, /* ok */
517 .socketpair = sock_no_socketpair, /* a do nothing */
518 .accept = inet_accept, /* ok */
519 .getname = inet6_getname,
520 .poll = tcp_poll, /* ok */
521 .ioctl = inet6_ioctl, /* must change */
522 .listen = inet_listen, /* ok */
523 .shutdown = inet_shutdown, /* ok */
524 .setsockopt = sock_common_setsockopt, /* ok */
525 .getsockopt = sock_common_getsockopt, /* ok */
7ba42910
CG		 526 .sendmsg = inet_sendmsg, /* ok */
527 .recvmsg = inet_recvmsg, /* ok */
543d9cfe 528 .mmap = sock_no_mmap,
7ba42910 529 .sendpage = inet_sendpage,
a0974dd3 530 .splice_read = tcp_splice_read,
3fdadf7d 531#ifdef CONFIG_COMPAT
543d9cfe
ACM		 532 .compat_setsockopt = compat_sock_common_setsockopt,
533 .compat_getsockopt = compat_sock_common_getsockopt,
3fdadf7d 534#endif
1da177e4
LT		 535};
536
90ddc4f0 537const struct proto_ops inet6_dgram_ops = {
543d9cfe
ACM		 538 .family = PF_INET6,
539 .owner = THIS_MODULE,
540 .release = inet6_release,
541 .bind = inet6_bind,
542 .connect = inet_dgram_connect, /* ok */
543 .socketpair = sock_no_socketpair, /* a do nothing */
544 .accept = sock_no_accept, /* a do nothing */
545 .getname = inet6_getname,
546 .poll = udp_poll, /* ok */
547 .ioctl = inet6_ioctl, /* must change */
548 .listen = sock_no_listen, /* ok */
549 .shutdown = inet_shutdown, /* ok */
550 .setsockopt = sock_common_setsockopt, /* ok */
551 .getsockopt = sock_common_getsockopt, /* ok */
552 .sendmsg = inet_sendmsg, /* ok */
7ba42910 553 .recvmsg = inet_recvmsg, /* ok */
543d9cfe
ACM		 554 .mmap = sock_no_mmap,
555 .sendpage = sock_no_sendpage,
3fdadf7d 556#ifdef CONFIG_COMPAT
543d9cfe
ACM		 557 .compat_setsockopt = compat_sock_common_setsockopt,
558 .compat_getsockopt = compat_sock_common_getsockopt,
3fdadf7d 559#endif
1da177e4
LT		 560};
561
ec1b4cf7 562static const struct net_proto_family inet6_family_ops = {
1da177e4
LT		 563 .family = PF_INET6,
564 .create = inet6_create,
565 .owner = THIS_MODULE,
566};
567
87c3efbf 568int inet6_register_protosw(struct inet_protosw *p)
1da177e4
LT		 569{
570 struct list_head *lh;
571 struct inet_protosw *answer;
1da177e4 572 struct list_head *last_perm;
87c3efbf
DL		 573 int protocol = p->protocol;
574 int ret;
1da177e4
LT		 575
576 spin_lock_bh(&inetsw6_lock);
577
87c3efbf 578 ret = -EINVAL;
1da177e4
LT		 579 if (p->type >= SOCK_MAX)
580 goto out_illegal;
581
582 /* If we are trying to override a permanent protocol, bail. */
583 answer = NULL;
87c3efbf 584 ret = -EPERM;
1da177e4
LT		 585 last_perm = &inetsw6[p->type];
586 list_for_each(lh, &inetsw6[p->type]) {
587 answer = list_entry(lh, struct inet_protosw, list);
588
589 /* Check only the non-wild match. */
590 if (INET_PROTOSW_PERMANENT & answer->flags) {
591 if (protocol == answer->protocol)
592 break;
593 last_perm = lh;
594 }
595
596 answer = NULL;
597 }
598 if (answer)
599 goto out_permanent;
600
601 /* Add the new entry after the last permanent entry if any, so that
602 * the new entry does not override a permanent entry when matched with
603 * a wild-card protocol. But it is allowed to override any existing
1ab1457c 604 * non-permanent entry. This means that when we remove this entry, the
1da177e4
LT		 605 * system automatically returns to the old behavior.
606 */
607 list_add_rcu(&p->list, last_perm);
87c3efbf 608 ret = 0;
1da177e4
LT		 609out:
610 spin_unlock_bh(&inetsw6_lock);
87c3efbf 611 return ret;
1da177e4
LT		 612
613out_permanent:
614 printk(KERN_ERR "Attempt to override permanent protocol %d.\n",
615 protocol);
616 goto out;
617
618out_illegal:
619 printk(KERN_ERR
620 "Ignoring attempt to register invalid socket type %d.\n",
621 p->type);
622 goto out;
623}
624
7159039a
YH		 625EXPORT_SYMBOL(inet6_register_protosw);
626
1da177e4
LT		 627void
628inet6_unregister_protosw(struct inet_protosw *p)
629{
630 if (INET_PROTOSW_PERMANENT & p->flags) {
631 printk(KERN_ERR
632 "Attempt to unregister permanent protocol %d.\n",
633 p->protocol);
634 } else {
635 spin_lock_bh(&inetsw6_lock);
636 list_del_rcu(&p->list);
637 spin_unlock_bh(&inetsw6_lock);
638
639 synchronize_net();
640 }
641}
642
7159039a
YH		 643EXPORT_SYMBOL(inet6_unregister_protosw);
644
b9750ce1
ACM		 645int inet6_sk_rebuild_header(struct sock *sk)
646{
b9750ce1 647 struct ipv6_pinfo *np = inet6_sk(sk);
68d0c6d3 648 struct dst_entry *dst;
b9750ce1
ACM		 649
650 dst = __sk_dst_check(sk, np->dst_cookie);
651
652 if (dst == NULL) {
653 struct inet_sock *inet = inet_sk(sk);
20c59de2 654 struct in6_addr *final_p, final;
4c9483b2
DM		 655 struct flowi6 fl6;
656
657 memset(&fl6, 0, sizeof(fl6));
658 fl6.flowi6_proto = sk->sk_protocol;
659 ipv6_addr_copy(&fl6.daddr, &np->daddr);
660 ipv6_addr_copy(&fl6.saddr, &np->saddr);
661 fl6.flowlabel = np->flow_label;
662 fl6.flowi6_oif = sk->sk_bound_dev_if;
663 fl6.flowi6_mark = sk->sk_mark;
1958b856
DM		 664 fl6.fl6_dport = inet->inet_dport;
665 fl6.fl6_sport = inet->inet_sport;
4c9483b2
DM		 666 security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
667
668 final_p = fl6_update_dst(&fl6, np->opt, &final);
669
670 dst = ip6_dst_lookup_flow(sk, &fl6, final_p, false);
68d0c6d3 671 if (IS_ERR(dst)) {
b9750ce1 672 sk->sk_route_caps = 0;
68d0c6d3
DM		 673 sk->sk_err_soft = -PTR_ERR(dst);
674 return PTR_ERR(dst);
b9750ce1
ACM		 675 }
676
8e1ef0a9 677 __ip6_dst_store(sk, dst, NULL, NULL);
b9750ce1
ACM		 678 }
679
680 return 0;
681}
682
683EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
684
399c07de
ACM		 685int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb)
686{
687 struct ipv6_pinfo *np = inet6_sk(sk);
688 struct inet6_skb_parm *opt = IP6CB(skb);
689
690 if (np->rxopt.all) {
691 if ((opt->hop && (np->rxopt.bits.hopopts ||
692 np->rxopt.bits.ohopopts)) ||
d56f90a7
ACM		 693 ((IPV6_FLOWINFO_MASK &
694 *(__be32 *)skb_network_header(skb)) &&
399c07de
ACM		 695 np->rxopt.bits.rxflow) ||
696 (opt->srcrt && (np->rxopt.bits.srcrt ||
697 np->rxopt.bits.osrcrt)) ||
698 ((opt->dst1 || opt->dst0) &&
699 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
700 return 1;
701 }
702 return 0;
703}
704
705EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
706
787e9208 707static int ipv6_gso_pull_exthdrs(struct sk_buff *skb, int proto)
662397fd 708{
41135cc8 709 const struct inet6_protocol *ops = NULL;
662397fd
YH		 710
711 for (;;) {
712 struct ipv6_opt_hdr *opth;
713 int len;
714
715 if (proto != NEXTHDR_HOP) {
716 ops = rcu_dereference(inet6_protos[proto]);
717
718 if (unlikely(!ops))
719 break;
720
721 if (!(ops->flags & INET6_PROTO_GSO_EXTHDR))
722 break;
723 }
724
725 if (unlikely(!pskb_may_pull(skb, 8)))
726 break;
727
728 opth = (void *)skb->data;
729 len = ipv6_optlen(opth);
730
731 if (unlikely(!pskb_may_pull(skb, len)))
732 break;
733
734 proto = opth->nexthdr;
735 __skb_pull(skb, len);
736 }
737
787e9208 738 return proto;
662397fd
YH		 739}
740
741static int ipv6_gso_send_check(struct sk_buff *skb)
742{
743 struct ipv6hdr *ipv6h;
41135cc8 744 const struct inet6_protocol *ops;
662397fd
YH		 745 int err = -EINVAL;
746
747 if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
748 goto out;
749
750 ipv6h = ipv6_hdr(skb);
751 __skb_pull(skb, sizeof(*ipv6h));
752 err = -EPROTONOSUPPORT;
753
754 rcu_read_lock();
787e9208
HX		 755 ops = rcu_dereference(inet6_protos[
756 ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr)]);
757
662397fd
YH		 758 if (likely(ops && ops->gso_send_check)) {
759 skb_reset_transport_header(skb);
760 err = ops->gso_send_check(skb);
761 }
762 rcu_read_unlock();
763
764out:
765 return err;
766}
767
04ed3e74 768static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, u32 features)
662397fd
YH		 769{
770 struct sk_buff *segs = ERR_PTR(-EINVAL);
771 struct ipv6hdr *ipv6h;
41135cc8 772 const struct inet6_protocol *ops;
ba735425
SS		 773 int proto;
774 struct frag_hdr *fptr;
775 unsigned int unfrag_ip6hlen;
776 u8 *prevhdr;
777 int offset = 0;
662397fd
YH		 778
779 if (!(features & NETIF_F_V6_CSUM))
780 features &= ~NETIF_F_SG;
781
782 if (unlikely(skb_shinfo(skb)->gso_type &
783 ~(SKB_GSO_UDP |
784 SKB_GSO_DODGY |
785 SKB_GSO_TCP_ECN |
786 SKB_GSO_TCPV6 |
787 0)))
788 goto out;
789
790 if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
791 goto out;
792
793 ipv6h = ipv6_hdr(skb);
794 __skb_pull(skb, sizeof(*ipv6h));
795 segs = ERR_PTR(-EPROTONOSUPPORT);
796
ba735425 797 proto = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
662397fd 798 rcu_read_lock();
ba735425 799 ops = rcu_dereference(inet6_protos[proto]);
662397fd
YH		 800 if (likely(ops && ops->gso_segment)) {
801 skb_reset_transport_header(skb);
802 segs = ops->gso_segment(skb, features);
803 }
804 rcu_read_unlock();
805
376d940e 806 if (IS_ERR(segs))
662397fd
YH		 807 goto out;
808
809 for (skb = segs; skb; skb = skb->next) {
810 ipv6h = ipv6_hdr(skb);
811 ipv6h->payload_len = htons(skb->len - skb->mac_len -
812 sizeof(*ipv6h));
ba735425
SS		 813 if (proto == IPPROTO_UDP) {
814 unfrag_ip6hlen = ip6_find_1stfragopt(skb, &prevhdr);
815 fptr = (struct frag_hdr *)(skb_network_header(skb) +
816 unfrag_ip6hlen);
817 fptr->frag_off = htons(offset);
818 if (skb->next != NULL)
819 fptr->frag_off |= htons(IP6_MF);
820 offset += (ntohs(ipv6h->payload_len) -
821 sizeof(struct frag_hdr));
822 }
662397fd
YH		 823 }
824
825out:
826 return segs;
827}
828
787e9208
HX		 829struct ipv6_gro_cb {
830 struct napi_gro_cb napi;
831 int proto;
832};
833
834#define IPV6_GRO_CB(skb) ((struct ipv6_gro_cb *)(skb)->cb)
835
836static struct sk_buff **ipv6_gro_receive(struct sk_buff **head,
837 struct sk_buff *skb)
838{
41135cc8 839 const struct inet6_protocol *ops;
787e9208
HX		 840 struct sk_buff **pp = NULL;
841 struct sk_buff *p;
842 struct ipv6hdr *iph;
843 unsigned int nlen;
a5b1cf28
HX		 844 unsigned int hlen;
845 unsigned int off;
787e9208
HX		 846 int flush = 1;
847 int proto;
ebad18e9 848 __wsum csum;
787e9208 849
a5b1cf28
HX		 850 off = skb_gro_offset(skb);
851 hlen = off + sizeof(*iph);
852 iph = skb_gro_header_fast(skb, off);
853 if (skb_gro_header_hard(skb, hlen)) {
854 iph = skb_gro_header_slow(skb, hlen, off);
855 if (unlikely(!iph))
856 goto out;
857 }
787e9208 858
86911732
HX		 859 skb_gro_pull(skb, sizeof(*iph));
860 skb_set_transport_header(skb, skb_gro_offset(skb));
787e9208 861
86911732 862 flush += ntohs(iph->payload_len) != skb_gro_len(skb);
787e9208
HX		 863
864 rcu_read_lock();
86911732 865 proto = iph->nexthdr;
787e9208 866 ops = rcu_dereference(inet6_protos[proto]);
86911732
HX		 867 if (!ops || !ops->gro_receive) {
868 __pskb_pull(skb, skb_gro_offset(skb));
869 proto = ipv6_gso_pull_exthdrs(skb, proto);
870 skb_gro_pull(skb, -skb_transport_offset(skb));
871 skb_reset_transport_header(skb);
872 __skb_push(skb, skb_gro_offset(skb));
873
874 if (!ops || !ops->gro_receive)
875 goto out_unlock;
876
877 iph = ipv6_hdr(skb);
878 }
879
880 IPV6_GRO_CB(skb)->proto = proto;
787e9208
HX		 881
882 flush--;
787e9208
HX		 883 nlen = skb_network_header_len(skb);
884
885 for (p = *head; p; p = p->next) {
886 struct ipv6hdr *iph2;
887
888 if (!NAPI_GRO_CB(p)->same_flow)
889 continue;
890
891 iph2 = ipv6_hdr(p);
892
893 /* All fields must match except length. */
894 if (nlen != skb_network_header_len(p) ||
895 memcmp(iph, iph2, offsetof(struct ipv6hdr, payload_len)) ||
896 memcmp(&iph->nexthdr, &iph2->nexthdr,
897 nlen - offsetof(struct ipv6hdr, nexthdr))) {
898 NAPI_GRO_CB(p)->same_flow = 0;
899 continue;
900 }
901
902 NAPI_GRO_CB(p)->flush |= flush;
903 }
904
905 NAPI_GRO_CB(skb)->flush |= flush;
906
ebad18e9
HX		 907 csum = skb->csum;
908 skb_postpull_rcsum(skb, iph, skb_network_header_len(skb));
909
787e9208
HX		 910 pp = ops->gro_receive(head, skb);
911
ebad18e9
HX		 912 skb->csum = csum;
913
787e9208
HX		 914out_unlock:
915 rcu_read_unlock();
916
917out:
918 NAPI_GRO_CB(skb)->flush |= flush;
919
920 return pp;
921}
922
923static int ipv6_gro_complete(struct sk_buff *skb)
924{
41135cc8 925 const struct inet6_protocol *ops;
787e9208
HX		 926 struct ipv6hdr *iph = ipv6_hdr(skb);
927 int err = -ENOSYS;
928
929 iph->payload_len = htons(skb->len - skb_network_offset(skb) -
930 sizeof(*iph));
931
932 rcu_read_lock();
933 ops = rcu_dereference(inet6_protos[IPV6_GRO_CB(skb)->proto]);
934 if (WARN_ON(!ops || !ops->gro_complete))
935 goto out_unlock;
936
937 err = ops->gro_complete(skb);
938
939out_unlock:
940 rcu_read_unlock();
941
942 return err;
943}
944
7546dd97 945static struct packet_type ipv6_packet_type __read_mostly = {
09640e63 946 .type = cpu_to_be16(ETH_P_IPV6),
662397fd
YH		 947 .func = ipv6_rcv,
948 .gso_send_check = ipv6_gso_send_check,
949 .gso_segment = ipv6_gso_segment,
787e9208
HX		 950 .gro_receive = ipv6_gro_receive,
951 .gro_complete = ipv6_gro_complete,
662397fd
YH		 952};
953
954static int __init ipv6_packet_init(void)
955{
956 dev_add_pack(&ipv6_packet_type);
957 return 0;
958}
959
960static void ipv6_packet_cleanup(void)
961{
962 dev_remove_pack(&ipv6_packet_type);
963}
964
e43291cb
DL		 965static int __net_init ipv6_init_mibs(struct net *net)
966{
7d720c3e 967 if (snmp_mib_init((void __percpu **)net->mib.udp_stats_in6,
1823e4c8
ED		 968 sizeof(struct udp_mib),
969 __alignof__(struct udp_mib)) < 0)
0c7ed677 970 return -ENOMEM;
7d720c3e 971 if (snmp_mib_init((void __percpu **)net->mib.udplite_stats_in6,
1823e4c8
ED		 972 sizeof(struct udp_mib),
973 __alignof__(struct udp_mib)) < 0)
be713a44 974 goto err_udplite_mib;
7d720c3e 975 if (snmp_mib_init((void __percpu **)net->mib.ipv6_statistics,
1823e4c8
ED		 976 sizeof(struct ipstats_mib),
977 __alignof__(struct ipstats_mib)) < 0)
9261e537 978 goto err_ip_mib;
7d720c3e 979 if (snmp_mib_init((void __percpu **)net->mib.icmpv6_statistics,
1823e4c8
ED		 980 sizeof(struct icmpv6_mib),
981 __alignof__(struct icmpv6_mib)) < 0)
9261e537 982 goto err_icmp_mib;
7d720c3e 983 if (snmp_mib_init((void __percpu **)net->mib.icmpv6msg_statistics,
1823e4c8
ED		 984 sizeof(struct icmpv6msg_mib),
985 __alignof__(struct icmpv6msg_mib)) < 0)
9261e537 986 goto err_icmpmsg_mib;
e43291cb 987 return 0;
be713a44 988
9261e537 989err_icmpmsg_mib:
7d720c3e 990 snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics);
9261e537 991err_icmp_mib:
7d720c3e 992 snmp_mib_free((void __percpu **)net->mib.ipv6_statistics);
9261e537 993err_ip_mib:
7d720c3e 994 snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6);
be713a44 995err_udplite_mib:
7d720c3e 996 snmp_mib_free((void __percpu **)net->mib.udp_stats_in6);
be713a44 997 return -ENOMEM;
e43291cb
DL		 998}
999
2c8c1e72 1000static void ipv6_cleanup_mibs(struct net *net)
e43291cb 1001{
7d720c3e
TH		 1002 snmp_mib_free((void __percpu **)net->mib.udp_stats_in6);
1003 snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6);
1004 snmp_mib_free((void __percpu **)net->mib.ipv6_statistics);
1005 snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics);
1006 snmp_mib_free((void __percpu **)net->mib.icmpv6msg_statistics);
e43291cb
DL		 1007}
1008
e7dc8494 1009static int __net_init inet6_net_init(struct net *net)
81c1c178 1010{
0c96d8c5
DL		 1011 int err = 0;
1012
99bc9c4e 1013 net->ipv6.sysctl.bindv6only = 0;
41a76906 1014 net->ipv6.sysctl.icmpv6_time = 1*HZ;
e71e0349 1015
e43291cb
DL		 1016 err = ipv6_init_mibs(net);
1017 if (err)
1018 return err;
0c96d8c5
DL		 1019#ifdef CONFIG_PROC_FS
1020 err = udp6_proc_init(net);
1021 if (err)
1022 goto out;
6f8b13bc
DL		 1023 err = tcp6_proc_init(net);
1024 if (err)
1025 goto proc_tcp6_fail;
6ab57e7e
DL		 1026 err = ac6_proc_init(net);
1027 if (err)
1028 goto proc_ac6_fail;
0c96d8c5
DL		 1029#endif
1030 return err;
6f8b13bc
DL		 1031
1032#ifdef CONFIG_PROC_FS
6ab57e7e
DL		 1033proc_ac6_fail:
1034 tcp6_proc_exit(net);
6f8b13bc
DL		 1035proc_tcp6_fail:
1036 udp6_proc_exit(net);
e43291cb
DL		 1037out:
1038 ipv6_cleanup_mibs(net);
1039 return err;
6f8b13bc 1040#endif
81c1c178
DL		 1041}
1042
2c8c1e72 1043static void __net_exit inet6_net_exit(struct net *net)
81c1c178 1044{
0c96d8c5
DL		 1045#ifdef CONFIG_PROC_FS
1046 udp6_proc_exit(net);
6f8b13bc 1047 tcp6_proc_exit(net);
6ab57e7e 1048 ac6_proc_exit(net);
0c96d8c5 1049#endif
e43291cb 1050 ipv6_cleanup_mibs(net);
81c1c178
DL		 1051}
1052
1053static struct pernet_operations inet6_net_ops = {
1054 .init = inet6_net_init,
1055 .exit = inet6_net_exit,
1056};
1057
1da177e4
LT		 1058static int __init inet6_init(void)
1059{
1060 struct sk_buff *dummy_skb;
1ab1457c 1061 struct list_head *r;
fe7ca2e1 1062 int err = 0;
1da177e4 1063
ef047f5e
YH		 1064 BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > sizeof(dummy_skb->cb));
1065
fe7ca2e1
BH		 1066 /* Register the socket-side information for inet6_create. */
1067 for(r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
1068 INIT_LIST_HEAD(r);
1069
56d417b1 1070 if (disable_ipv6_mod) {
fe7ca2e1
BH		 1071 printk(KERN_INFO
1072 "IPv6: Loaded, but administratively disabled, "
1073 "reboot required to enable\n");
1074 goto out;
1075 }
1076
1da177e4
LT		 1077 err = proto_register(&tcpv6_prot, 1);
1078 if (err)
1079 goto out;
1080
1081 err = proto_register(&udpv6_prot, 1);
1082 if (err)
1083 goto out_unregister_tcp_proto;
1084
ba4e58ec 1085 err = proto_register(&udplitev6_prot, 1);
1da177e4
LT		 1086 if (err)
1087 goto out_unregister_udp_proto;
1088
ba4e58ec
GR		 1089 err = proto_register(&rawv6_prot, 1);
1090 if (err)
1091 goto out_unregister_udplite_proto;
1092
1da177e4 1093
1da177e4
LT		 1094 /* We MUST register RAW sockets before we create the ICMP6,
1095 * IGMP6, or NDISC control sockets.
1096 */
7f4e4868
DL		 1097 err = rawv6_init();
1098 if (err)
1099 goto out_unregister_raw_proto;
1da177e4
LT		 1100
1101 /* Register the family here so that the init calls below will
1102 * be able to create sockets. (?? is this dangerous ??)
1103 */
8eb55910
DM		 1104 err = sock_register(&inet6_family_ops);
1105 if (err)
7f4e4868 1106 goto out_sock_register_fail;
1da177e4 1107
eeb61f71
AV		 1108#ifdef CONFIG_SYSCTL
1109 err = ipv6_static_sysctl_register();
1110 if (err)
1111 goto static_sysctl_fail;
1112#endif
1da177e4
LT		 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 availiable by both INET and INET6 APIs and
1117 * able to communicate via both network protocols.
1118 */
1119
81c1c178
DL		 1120 err = register_pernet_subsys(&inet6_net_ops);
1121 if (err)
1122 goto register_pernet_fail;
9b0f976f 1123 err = icmpv6_init();
1da177e4
LT		 1124 if (err)
1125 goto icmp_fail;
623d1a1a
WC		 1126 err = ip6_mr_init();
1127 if (err)
1128 goto ipmr_fail;
9b0f976f 1129 err = ndisc_init();
1da177e4
LT		 1130 if (err)
1131 goto ndisc_fail;
9b0f976f 1132 err = igmp6_init();
1da177e4
LT		 1133 if (err)
1134 goto igmp_fail;
2cc7d573
HW		 1135 err = ipv6_netfilter_init();
1136 if (err)
1137 goto netfilter_fail;
1da177e4
LT		 1138 /* Create /proc/foo6 entries. */
1139#ifdef CONFIG_PROC_FS
1140 err = -ENOMEM;
1141 if (raw6_proc_init())
1142 goto proc_raw6_fail;
ba4e58ec
GR		 1143 if (udplite6_proc_init())
1144 goto proc_udplite6_fail;
1da177e4
LT		 1145 if (ipv6_misc_proc_init())
1146 goto proc_misc6_fail;
1da177e4
LT		 1147 if (if6_proc_init())
1148 goto proc_if6_fail;
1149#endif
e2fddf5e
DL		 1150 err = ip6_route_init();
1151 if (err)
1152 goto ip6_route_fail;
0a3e78ac
DL		 1153 err = ip6_flowlabel_init();
1154 if (err)
1155 goto ip6_flowlabel_fail;
1da177e4
LT		 1156 err = addrconf_init();
1157 if (err)
1158 goto addrconf_fail;
1da177e4
LT		 1159
1160 /* Init v6 extension headers. */
248b238d
DL		 1161 err = ipv6_exthdrs_init();
1162 if (err)
1163 goto ipv6_exthdrs_fail;
1164
853cbbaa
DL		 1165 err = ipv6_frag_init();
1166 if (err)
1167 goto ipv6_frag_fail;
1da177e4
LT		 1168
1169 /* Init v6 transport protocols. */
7f4e4868
DL		 1170 err = udpv6_init();
1171 if (err)
1172 goto udpv6_fail;
e2ed4052 1173
7f4e4868
DL		 1174 err = udplitev6_init();
1175 if (err)
1176 goto udplitev6_fail;
1177
1178 err = tcpv6_init();
1179 if (err)
1180 goto tcpv6_fail;
1181
1182 err = ipv6_packet_init();
1183 if (err)
1184 goto ipv6_packet_fail;
94911fe3
BT		 1185
1186#ifdef CONFIG_SYSCTL
1187 err = ipv6_sysctl_register();
1188 if (err)
1189 goto sysctl_fail;
1190#endif
1da177e4
LT		 1191out:
1192 return err;
1193
94911fe3
BT		 1194#ifdef CONFIG_SYSCTL
1195sysctl_fail:
1196 ipv6_packet_cleanup();
1197#endif
7f4e4868
DL		 1198ipv6_packet_fail:
1199 tcpv6_exit();
1200tcpv6_fail:
1201 udplitev6_exit();
1202udplitev6_fail:
1203 udpv6_exit();
1204udpv6_fail:
1205 ipv6_frag_exit();
853cbbaa
DL		 1206ipv6_frag_fail:
1207 ipv6_exthdrs_exit();
248b238d
DL		 1208ipv6_exthdrs_fail:
1209 addrconf_cleanup();
1da177e4
LT		 1210addrconf_fail:
1211 ip6_flowlabel_cleanup();
0a3e78ac 1212ip6_flowlabel_fail:
1da177e4 1213 ip6_route_cleanup();
e2fddf5e 1214ip6_route_fail:
1da177e4
LT		 1215#ifdef CONFIG_PROC_FS
1216 if6_proc_exit();
1217proc_if6_fail:
1da177e4
LT		 1218 ipv6_misc_proc_exit();
1219proc_misc6_fail:
ba4e58ec
GR		 1220 udplite6_proc_exit();
1221proc_udplite6_fail:
1da177e4
LT		 1222 raw6_proc_exit();
1223proc_raw6_fail:
1224#endif
2cc7d573
HW		 1225 ipv6_netfilter_fini();
1226netfilter_fail:
1da177e4
LT		 1227 igmp6_cleanup();
1228igmp_fail:
1229 ndisc_cleanup();
1230ndisc_fail:
623d1a1a
WC		 1231 ip6_mr_cleanup();
1232ipmr_fail:
1da177e4
LT		 1233 icmpv6_cleanup();
1234icmp_fail:
81c1c178
DL		 1235 unregister_pernet_subsys(&inet6_net_ops);
1236register_pernet_fail:
eeb61f71
AV		 1237#ifdef CONFIG_SYSCTL
1238 ipv6_static_sysctl_unregister();
1239static_sysctl_fail:
1240#endif
8eb55910 1241 sock_unregister(PF_INET6);
e2fddf5e 1242 rtnl_unregister_all(PF_INET6);
7f4e4868
DL		 1243out_sock_register_fail:
1244 rawv6_exit();
1da177e4
LT		 1245out_unregister_raw_proto:
1246 proto_unregister(&rawv6_prot);
ba4e58ec
GR		 1247out_unregister_udplite_proto:
1248 proto_unregister(&udplitev6_prot);
1da177e4
LT		 1249out_unregister_udp_proto:
1250 proto_unregister(&udpv6_prot);
1251out_unregister_tcp_proto:
1252 proto_unregister(&tcpv6_prot);
1253 goto out;
1254}
1255module_init(inet6_init);
1256
1257static void __exit inet6_exit(void)
1258{
56d417b1 1259 if (disable_ipv6_mod)
ff8cf9a9
JD		 1260 return;
1261
1da177e4
LT		 1262 /* First of all disallow new sockets creation. */
1263 sock_unregister(PF_INET6);
c127ea2c
TG		 1264 /* Disallow any further netlink messages */
1265 rtnl_unregister_all(PF_INET6);
ca17c233 1266
94911fe3
BT		 1267#ifdef CONFIG_SYSCTL
1268 ipv6_sysctl_unregister();
1269#endif
7f4e4868
DL		 1270 udpv6_exit();
1271 udplitev6_exit();
1272 tcpv6_exit();
1273
ca17c233
JJ		 1274 /* Cleanup code parts. */
1275 ipv6_packet_cleanup();
853cbbaa 1276 ipv6_frag_exit();
248b238d 1277 ipv6_exthdrs_exit();
ca17c233
JJ		 1278 addrconf_cleanup();
1279 ip6_flowlabel_cleanup();
1280 ip6_route_cleanup();
1da177e4 1281#ifdef CONFIG_PROC_FS
ca17c233
JJ		 1282
1283 /* Cleanup code parts. */
1da177e4 1284 if6_proc_exit();
1ab1457c 1285 ipv6_misc_proc_exit();
1ab1457c 1286 udplite6_proc_exit();
1ab1457c 1287 raw6_proc_exit();
2c8d7ca0 1288#endif
2cc7d573 1289 ipv6_netfilter_fini();
ca17c233 1290 igmp6_cleanup();
1da177e4 1291 ndisc_cleanup();
623d1a1a 1292 ip6_mr_cleanup();
1da177e4 1293 icmpv6_cleanup();
7f4e4868 1294 rawv6_exit();
94911fe3 1295
81c1c178 1296 unregister_pernet_subsys(&inet6_net_ops);
eeb61f71
AV		 1297#ifdef CONFIG_SYSCTL
1298 ipv6_static_sysctl_unregister();
1299#endif
1da177e4 1300 proto_unregister(&rawv6_prot);
ca17c233 1301 proto_unregister(&udplitev6_prot);
1da177e4
LT		 1302 proto_unregister(&udpv6_prot);
1303 proto_unregister(&tcpv6_prot);
1f2ccd00
JDB		 1304
1305 rcu_barrier(); /* Wait for completion of call_rcu()'s */
1da177e4
LT		 1306}
1307module_exit(inet6_exit);
1308
1309MODULE_ALIAS_NETPROTO(PF_INET6);