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udpv6: Handle large incoming UDP/IPv6 packets and support software UFO
[linux-2.6-block.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>
39
40#include <linux/inet.h>
41#include <linux/netdevice.h>
42#include <linux/icmpv6.h>
2cc7d573 43#include <linux/netfilter_ipv6.h>
1da177e4
LT		 44
45#include <net/ip.h>
46#include <net/ipv6.h>
47#include <net/udp.h>
ba4e58ec 48#include <net/udplite.h>
1da177e4
LT		 49#include <net/tcp.h>
50#include <net/ipip.h>
51#include <net/protocol.h>
52#include <net/inet_common.h>
1668e010 53#include <net/route.h>
1da177e4
LT		 54#include <net/transp_v6.h>
55#include <net/ip6_route.h>
56#include <net/addrconf.h>
57#ifdef CONFIG_IPV6_TUNNEL
58#include <net/ip6_tunnel.h>
59#endif
60
61#include <asm/uaccess.h>
62#include <asm/system.h>
7bc570c8 63#include <linux/mroute6.h>
1da177e4
LT		 64
65MODULE_AUTHOR("Cast of dozens");
66MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
67MODULE_LICENSE("GPL");
68
f1267347 69/* The inetsw6 table contains everything that inet6_create needs to
1da177e4
LT		 70 * build a new socket.
71 */
72static struct list_head inetsw6[SOCK_MAX];
73static DEFINE_SPINLOCK(inetsw6_lock);
74
56d417b1
BH		 75struct ipv6_params ipv6_defaults = {
76 .disable_ipv6 = 0,
77 .autoconf = 1,
78};
79
80static int disable_ipv6_mod = 0;
81
82module_param_named(disable, disable_ipv6_mod, int, 0444);
83MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional");
84
85module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444);
86MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces");
87
88module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444);
89MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces");
fe7ca2e1 90
1da177e4
LT		 91static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
92{
93 const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
94
95 return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
96}
97
1b8d7ae4 98static int inet6_create(struct net *net, struct socket *sock, int protocol)
1da177e4
LT		 99{
100 struct inet_sock *inet;
101 struct ipv6_pinfo *np;
102 struct sock *sk;
1da177e4
LT		 103 struct inet_protosw *answer;
104 struct proto *answer_prot;
105 unsigned char answer_flags;
106 char answer_no_check;
af1afe86
YH		 107 int try_loading_module = 0;
108 int err;
1da177e4 109
b3da2cf3
DM		 110 if (sock->type != SOCK_RAW &&
111 sock->type != SOCK_DGRAM &&
112 !inet_ehash_secret)
113 build_ehash_secret();
114
1da177e4 115 /* Look for the requested type/protocol pair. */
af1afe86
YH		 116lookup_protocol:
117 err = -ESOCKTNOSUPPORT;
1da177e4 118 rcu_read_lock();
696adfe8 119 list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
1da177e4 120
696adfe8 121 err = 0;
1da177e4
LT		 122 /* Check the non-wild match. */
123 if (protocol == answer->protocol) {
124 if (protocol != IPPROTO_IP)
125 break;
126 } else {
127 /* Check for the two wild cases. */
128 if (IPPROTO_IP == protocol) {
129 protocol = answer->protocol;
130 break;
131 }
132 if (IPPROTO_IP == answer->protocol)
133 break;
134 }
af1afe86 135 err = -EPROTONOSUPPORT;
1da177e4
LT		 136 }
137
696adfe8 138 if (err) {
af1afe86
YH		 139 if (try_loading_module < 2) {
140 rcu_read_unlock();
141 /*
142 * Be more specific, e.g. net-pf-10-proto-132-type-1
143 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
144 */
145 if (++try_loading_module == 1)
146 request_module("net-pf-%d-proto-%d-type-%d",
147 PF_INET6, protocol, sock->type);
148 /*
149 * Fall back to generic, e.g. net-pf-10-proto-132
150 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
151 */
152 else
153 request_module("net-pf-%d-proto-%d",
154 PF_INET6, protocol);
155 goto lookup_protocol;
156 } else
157 goto out_rcu_unlock;
158 }
159
160 err = -EPERM;
1da177e4
LT		 161 if (answer->capability > 0 && !capable(answer->capability))
162 goto out_rcu_unlock;
1da177e4
LT		 163
164 sock->ops = answer->ops;
1da177e4
LT		 165 answer_prot = answer->prot;
166 answer_no_check = answer->no_check;
167 answer_flags = answer->flags;
168 rcu_read_unlock();
169
547b792c 170 WARN_ON(answer_prot->slab == NULL);
1da177e4 171
af1afe86 172 err = -ENOBUFS;
6257ff21 173 sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot);
1da177e4
LT		 174 if (sk == NULL)
175 goto out;
176
177 sock_init_data(sock, sk);
178
af1afe86 179 err = 0;
1da177e4
LT		 180 sk->sk_no_check = answer_no_check;
181 if (INET_PROTOSW_REUSE & answer_flags)
182 sk->sk_reuse = 1;
183
184 inet = inet_sk(sk);
469de9b9 185 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
1da177e4
LT		 186
187 if (SOCK_RAW == sock->type) {
188 inet->num = protocol;
189 if (IPPROTO_RAW == protocol)
190 inet->hdrincl = 1;
191 }
192
e6848976 193 sk->sk_destruct = inet_sock_destruct;
1da177e4
LT		 194 sk->sk_family = PF_INET6;
195 sk->sk_protocol = protocol;
196
197 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
198
199 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
200 np->hop_limit = -1;
201 np->mcast_hops = -1;
202 np->mc_loop = 1;
203 np->pmtudisc = IPV6_PMTUDISC_WANT;
2e761e05 204 np->ipv6only = net->ipv6.sysctl.bindv6only;
1ab1457c 205
1da177e4
LT		 206 /* Init the ipv4 part of the socket since we can have sockets
207 * using v6 API for ipv4.
208 */
209 inet->uc_ttl = -1;
210
211 inet->mc_loop = 1;
212 inet->mc_ttl = 1;
213 inet->mc_index = 0;
214 inet->mc_list = NULL;
215
216 if (ipv4_config.no_pmtu_disc)
217 inet->pmtudisc = IP_PMTUDISC_DONT;
218 else
219 inet->pmtudisc = IP_PMTUDISC_WANT;
1ab1457c 220 /*
e6848976
ACM		 221 * Increment only the relevant sk_prot->socks debug field, this changes
222 * the previous behaviour of incrementing both the equivalent to
223 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
224 *
225 * This allows better debug granularity as we'll know exactly how many
226 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
227 * transport protocol socks. -acme
228 */
229 sk_refcnt_debug_inc(sk);
1da177e4 230
1da177e4
LT		 231 if (inet->num) {
232 /* It assumes that any protocol which allows
233 * the user to assign a number at socket
234 * creation time automatically shares.
235 */
e69a4adc 236 inet->sport = htons(inet->num);
1da177e4
LT		 237 sk->sk_prot->hash(sk);
238 }
239 if (sk->sk_prot->init) {
af1afe86
YH		 240 err = sk->sk_prot->init(sk);
241 if (err) {
1da177e4
LT		 242 sk_common_release(sk);
243 goto out;
244 }
245 }
246out:
af1afe86 247 return err;
1da177e4
LT		 248out_rcu_unlock:
249 rcu_read_unlock();
250 goto out;
251}
252
253
254/* bind for INET6 API */
255int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
256{
257 struct sockaddr_in6 *addr=(struct sockaddr_in6 *)uaddr;
258 struct sock *sk = sock->sk;
259 struct inet_sock *inet = inet_sk(sk);
260 struct ipv6_pinfo *np = inet6_sk(sk);
3b1e0a65 261 struct net *net = sock_net(sk);
fd683222 262 __be32 v4addr = 0;
1da177e4
LT		 263 unsigned short snum;
264 int addr_type = 0;
265 int err = 0;
266
267 /* If the socket has its own bind function then use it. */
268 if (sk->sk_prot->bind)
269 return sk->sk_prot->bind(sk, uaddr, addr_len);
270
271 if (addr_len < SIN6_LEN_RFC2133)
272 return -EINVAL;
273 addr_type = ipv6_addr_type(&addr->sin6_addr);
274 if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM)
275 return -EINVAL;
276
277 snum = ntohs(addr->sin6_port);
278 if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
279 return -EACCES;
280
281 lock_sock(sk);
282
283 /* Check these errors (active socket, double bind). */
284 if (sk->sk_state != TCP_CLOSE || inet->num) {
285 err = -EINVAL;
286 goto out;
287 }
288
289 /* Check if the address belongs to the host. */
290 if (addr_type == IPV6_ADDR_MAPPED) {
63d9950b
VY		 291 int chk_addr_ret;
292
783ed5a7
VY		 293 /* Binding to v4-mapped address on a v6-only socket
294 * makes no sense
295 */
296 if (np->ipv6only) {
297 err = -EINVAL;
298 goto out;
299 }
63d9950b
VY		 300
301 /* Reproduce AF_INET checks to make the bindings consitant */
1da177e4 302 v4addr = addr->sin6_addr.s6_addr32[3];
63d9950b
VY		 303 chk_addr_ret = inet_addr_type(net, v4addr);
304 if (!sysctl_ip_nonlocal_bind &&
305 !(inet->freebind || inet->transparent) &&
306 v4addr != htonl(INADDR_ANY) &&
307 chk_addr_ret != RTN_LOCAL &&
308 chk_addr_ret != RTN_MULTICAST &&
309 chk_addr_ret != RTN_BROADCAST)
1da177e4 310 goto out;
1da177e4
LT		 311 } else {
312 if (addr_type != IPV6_ADDR_ANY) {
313 struct net_device *dev = NULL;
314
315 if (addr_type & IPV6_ADDR_LINKLOCAL) {
316 if (addr_len >= sizeof(struct sockaddr_in6) &&
317 addr->sin6_scope_id) {
318 /* Override any existing binding, if another one
319 * is supplied by user.
320 */
321 sk->sk_bound_dev_if = addr->sin6_scope_id;
322 }
1ab1457c 323
1da177e4
LT		 324 /* Binding to link-local address requires an interface */
325 if (!sk->sk_bound_dev_if) {
326 err = -EINVAL;
327 goto out;
328 }
075de939 329 dev = dev_get_by_index(net, sk->sk_bound_dev_if);
1da177e4
LT		 330 if (!dev) {
331 err = -ENODEV;
332 goto out;
333 }
334 }
335
336 /* ipv4 addr of the socket is invalid. Only the
337 * unspecified and mapped address have a v4 equivalent.
338 */
339 v4addr = LOOPBACK4_IPV6;
340 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
075de939 341 if (!ipv6_chk_addr(net, &addr->sin6_addr,
bfeade08 342 dev, 0)) {
1da177e4
LT		 343 if (dev)
344 dev_put(dev);
345 err = -EADDRNOTAVAIL;
346 goto out;
347 }
348 }
349 if (dev)
350 dev_put(dev);
351 }
352 }
353
354 inet->rcv_saddr = v4addr;
355 inet->saddr = v4addr;
356
357 ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
1ab1457c 358
1da177e4
LT		 359 if (!(addr_type & IPV6_ADDR_MULTICAST))
360 ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
361
362 /* Make sure we are allowed to bind here. */
363 if (sk->sk_prot->get_port(sk, snum)) {
364 inet_reset_saddr(sk);
365 err = -EADDRINUSE;
366 goto out;
367 }
368
0f8d3c7a 369 if (addr_type != IPV6_ADDR_ANY) {
1da177e4 370 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
0f8d3c7a
VY		 371 if (addr_type != IPV6_ADDR_MAPPED)
372 np->ipv6only = 1;
373 }
1da177e4
LT		 374 if (snum)
375 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
e69a4adc 376 inet->sport = htons(inet->num);
1da177e4
LT		 377 inet->dport = 0;
378 inet->daddr = 0;
379out:
380 release_sock(sk);
381 return err;
382}
383
7159039a
YH		 384EXPORT_SYMBOL(inet6_bind);
385
1da177e4
LT		 386int inet6_release(struct socket *sock)
387{
388 struct sock *sk = sock->sk;
389
390 if (sk == NULL)
391 return -EINVAL;
392
393 /* Free mc lists */
394 ipv6_sock_mc_close(sk);
395
396 /* Free ac lists */
397 ipv6_sock_ac_close(sk);
398
399 return inet_release(sock);
400}
401
7159039a
YH		 402EXPORT_SYMBOL(inet6_release);
403
7d06b2e0 404void inet6_destroy_sock(struct sock *sk)
1da177e4
LT		 405{
406 struct ipv6_pinfo *np = inet6_sk(sk);
407 struct sk_buff *skb;
408 struct ipv6_txoptions *opt;
409
1da177e4
LT		 410 /* Release rx options */
411
412 if ((skb = xchg(&np->pktoptions, NULL)) != NULL)
413 kfree_skb(skb);
414
415 /* Free flowlabels */
416 fl6_free_socklist(sk);
417
418 /* Free tx options */
419
420 if ((opt = xchg(&np->opt, NULL)) != NULL)
421 sock_kfree_s(sk, opt, opt->tot_len);
1da177e4
LT		 422}
423
3cf3dc6c
ACM		 424EXPORT_SYMBOL_GPL(inet6_destroy_sock);
425
1da177e4
LT		 426/*
427 * This does both peername and sockname.
428 */
1ab1457c 429
1da177e4
LT		 430int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
431 int *uaddr_len, int peer)
432{
433 struct sockaddr_in6 *sin=(struct sockaddr_in6 *)uaddr;
434 struct sock *sk = sock->sk;
435 struct inet_sock *inet = inet_sk(sk);
436 struct ipv6_pinfo *np = inet6_sk(sk);
1ab1457c 437
1da177e4
LT		 438 sin->sin6_family = AF_INET6;
439 sin->sin6_flowinfo = 0;
440 sin->sin6_scope_id = 0;
441 if (peer) {
442 if (!inet->dport)
443 return -ENOTCONN;
444 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
445 peer == 1)
446 return -ENOTCONN;
447 sin->sin6_port = inet->dport;
448 ipv6_addr_copy(&sin->sin6_addr, &np->daddr);
449 if (np->sndflow)
450 sin->sin6_flowinfo = np->flow_label;
451 } else {
452 if (ipv6_addr_any(&np->rcv_saddr))
453 ipv6_addr_copy(&sin->sin6_addr, &np->saddr);
454 else
455 ipv6_addr_copy(&sin->sin6_addr, &np->rcv_saddr);
456
457 sin->sin6_port = inet->sport;
458 }
459 if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL)
460 sin->sin6_scope_id = sk->sk_bound_dev_if;
461 *uaddr_len = sizeof(*sin);
462 return(0);
463}
464
7159039a
YH		 465EXPORT_SYMBOL(inet6_getname);
466
1da177e4
LT		 467int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
468{
469 struct sock *sk = sock->sk;
3b1e0a65 470 struct net *net = sock_net(sk);
1da177e4 471
1ab1457c 472 switch(cmd)
1da177e4
LT		 473 {
474 case SIOCGSTAMP:
475 return sock_get_timestamp(sk, (struct timeval __user *)arg);
476
ae40eb1e
ED		 477 case SIOCGSTAMPNS:
478 return sock_get_timestampns(sk, (struct timespec __user *)arg);
479
1da177e4
LT		 480 case SIOCADDRT:
481 case SIOCDELRT:
1ab1457c 482
5578689a 483 return(ipv6_route_ioctl(net, cmd, (void __user *)arg));
1da177e4
LT		 484
485 case SIOCSIFADDR:
af284937 486 return addrconf_add_ifaddr(net, (void __user *) arg);
1da177e4 487 case SIOCDIFADDR:
af284937 488 return addrconf_del_ifaddr(net, (void __user *) arg);
1da177e4 489 case SIOCSIFDSTADDR:
af284937 490 return addrconf_set_dstaddr(net, (void __user *) arg);
1da177e4 491 default:
b5e5fa5e
CH		 492 if (!sk->sk_prot->ioctl)
493 return -ENOIOCTLCMD;
494 return sk->sk_prot->ioctl(sk, cmd, arg);
1da177e4
LT		 495 }
496 /*NOTREACHED*/
497 return(0);
498}
499
7159039a
YH		 500EXPORT_SYMBOL(inet6_ioctl);
501
90ddc4f0 502const struct proto_ops inet6_stream_ops = {
543d9cfe
ACM		 503 .family = PF_INET6,
504 .owner = THIS_MODULE,
505 .release = inet6_release,
506 .bind = inet6_bind,
507 .connect = inet_stream_connect, /* ok */
508 .socketpair = sock_no_socketpair, /* a do nothing */
509 .accept = inet_accept, /* ok */
510 .getname = inet6_getname,
511 .poll = tcp_poll, /* ok */
512 .ioctl = inet6_ioctl, /* must change */
513 .listen = inet_listen, /* ok */
514 .shutdown = inet_shutdown, /* ok */
515 .setsockopt = sock_common_setsockopt, /* ok */
516 .getsockopt = sock_common_getsockopt, /* ok */
3516ffb0 517 .sendmsg = tcp_sendmsg, /* ok */
543d9cfe
ACM		 518 .recvmsg = sock_common_recvmsg, /* ok */
519 .mmap = sock_no_mmap,
520 .sendpage = tcp_sendpage,
a0974dd3 521 .splice_read = tcp_splice_read,
3fdadf7d 522#ifdef CONFIG_COMPAT
543d9cfe
ACM		 523 .compat_setsockopt = compat_sock_common_setsockopt,
524 .compat_getsockopt = compat_sock_common_getsockopt,
3fdadf7d 525#endif
1da177e4
LT		 526};
527
90ddc4f0 528const struct proto_ops inet6_dgram_ops = {
543d9cfe
ACM		 529 .family = PF_INET6,
530 .owner = THIS_MODULE,
531 .release = inet6_release,
532 .bind = inet6_bind,
533 .connect = inet_dgram_connect, /* ok */
534 .socketpair = sock_no_socketpair, /* a do nothing */
535 .accept = sock_no_accept, /* a do nothing */
536 .getname = inet6_getname,
537 .poll = udp_poll, /* ok */
538 .ioctl = inet6_ioctl, /* must change */
539 .listen = sock_no_listen, /* ok */
540 .shutdown = inet_shutdown, /* ok */
541 .setsockopt = sock_common_setsockopt, /* ok */
542 .getsockopt = sock_common_getsockopt, /* ok */
543 .sendmsg = inet_sendmsg, /* ok */
544 .recvmsg = sock_common_recvmsg, /* ok */
545 .mmap = sock_no_mmap,
546 .sendpage = sock_no_sendpage,
3fdadf7d 547#ifdef CONFIG_COMPAT
543d9cfe
ACM		 548 .compat_setsockopt = compat_sock_common_setsockopt,
549 .compat_getsockopt = compat_sock_common_getsockopt,
3fdadf7d 550#endif
1da177e4
LT		 551};
552
553static struct net_proto_family inet6_family_ops = {
554 .family = PF_INET6,
555 .create = inet6_create,
556 .owner = THIS_MODULE,
557};
558
87c3efbf 559int inet6_register_protosw(struct inet_protosw *p)
1da177e4
LT		 560{
561 struct list_head *lh;
562 struct inet_protosw *answer;
1da177e4 563 struct list_head *last_perm;
87c3efbf
DL		 564 int protocol = p->protocol;
565 int ret;
1da177e4
LT		 566
567 spin_lock_bh(&inetsw6_lock);
568
87c3efbf 569 ret = -EINVAL;
1da177e4
LT		 570 if (p->type >= SOCK_MAX)
571 goto out_illegal;
572
573 /* If we are trying to override a permanent protocol, bail. */
574 answer = NULL;
87c3efbf 575 ret = -EPERM;
1da177e4
LT		 576 last_perm = &inetsw6[p->type];
577 list_for_each(lh, &inetsw6[p->type]) {
578 answer = list_entry(lh, struct inet_protosw, list);
579
580 /* Check only the non-wild match. */
581 if (INET_PROTOSW_PERMANENT & answer->flags) {
582 if (protocol == answer->protocol)
583 break;
584 last_perm = lh;
585 }
586
587 answer = NULL;
588 }
589 if (answer)
590 goto out_permanent;
591
592 /* Add the new entry after the last permanent entry if any, so that
593 * the new entry does not override a permanent entry when matched with
594 * a wild-card protocol. But it is allowed to override any existing
1ab1457c 595 * non-permanent entry. This means that when we remove this entry, the
1da177e4
LT		 596 * system automatically returns to the old behavior.
597 */
598 list_add_rcu(&p->list, last_perm);
87c3efbf 599 ret = 0;
1da177e4
LT		 600out:
601 spin_unlock_bh(&inetsw6_lock);
87c3efbf 602 return ret;
1da177e4
LT		 603
604out_permanent:
605 printk(KERN_ERR "Attempt to override permanent protocol %d.\n",
606 protocol);
607 goto out;
608
609out_illegal:
610 printk(KERN_ERR
611 "Ignoring attempt to register invalid socket type %d.\n",
612 p->type);
613 goto out;
614}
615
7159039a
YH		 616EXPORT_SYMBOL(inet6_register_protosw);
617
1da177e4
LT		 618void
619inet6_unregister_protosw(struct inet_protosw *p)
620{
621 if (INET_PROTOSW_PERMANENT & p->flags) {
622 printk(KERN_ERR
623 "Attempt to unregister permanent protocol %d.\n",
624 p->protocol);
625 } else {
626 spin_lock_bh(&inetsw6_lock);
627 list_del_rcu(&p->list);
628 spin_unlock_bh(&inetsw6_lock);
629
630 synchronize_net();
631 }
632}
633
7159039a
YH		 634EXPORT_SYMBOL(inet6_unregister_protosw);
635
b9750ce1
ACM		 636int inet6_sk_rebuild_header(struct sock *sk)
637{
638 int err;
639 struct dst_entry *dst;
640 struct ipv6_pinfo *np = inet6_sk(sk);
641
642 dst = __sk_dst_check(sk, np->dst_cookie);
643
644 if (dst == NULL) {
645 struct inet_sock *inet = inet_sk(sk);
646 struct in6_addr *final_p = NULL, final;
647 struct flowi fl;
648
649 memset(&fl, 0, sizeof(fl));
650 fl.proto = sk->sk_protocol;
651 ipv6_addr_copy(&fl.fl6_dst, &np->daddr);
652 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
653 fl.fl6_flowlabel = np->flow_label;
654 fl.oif = sk->sk_bound_dev_if;
655 fl.fl_ip_dport = inet->dport;
656 fl.fl_ip_sport = inet->sport;
beb8d13b 657 security_sk_classify_flow(sk, &fl);
b9750ce1
ACM		 658
659 if (np->opt && np->opt->srcrt) {
660 struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt;
661 ipv6_addr_copy(&final, &fl.fl6_dst);
662 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
663 final_p = &final;
664 }
665
666 err = ip6_dst_lookup(sk, &dst, &fl);
667 if (err) {
668 sk->sk_route_caps = 0;
669 return err;
670 }
671 if (final_p)
672 ipv6_addr_copy(&fl.fl6_dst, final_p);
673
52479b62 674 if ((err = xfrm_lookup(sock_net(sk), &dst, &fl, sk, 0)) < 0) {
b9750ce1
ACM		 675 sk->sk_err_soft = -err;
676 return err;
677 }
678
8e1ef0a9 679 __ip6_dst_store(sk, dst, NULL, NULL);
b9750ce1
ACM		 680 }
681
682 return 0;
683}
684
685EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
686
399c07de
ACM		 687int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb)
688{
689 struct ipv6_pinfo *np = inet6_sk(sk);
690 struct inet6_skb_parm *opt = IP6CB(skb);
691
692 if (np->rxopt.all) {
693 if ((opt->hop && (np->rxopt.bits.hopopts ||
694 np->rxopt.bits.ohopopts)) ||
d56f90a7
ACM		 695 ((IPV6_FLOWINFO_MASK &
696 *(__be32 *)skb_network_header(skb)) &&
399c07de
ACM		 697 np->rxopt.bits.rxflow) ||
698 (opt->srcrt && (np->rxopt.bits.srcrt ||
699 np->rxopt.bits.osrcrt)) ||
700 ((opt->dst1 || opt->dst0) &&
701 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
702 return 1;
703 }
704 return 0;
705}
706
707EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
708
787e9208 709static int ipv6_gso_pull_exthdrs(struct sk_buff *skb, int proto)
662397fd
YH		 710{
711 struct inet6_protocol *ops = NULL;
712
713 for (;;) {
714 struct ipv6_opt_hdr *opth;
715 int len;
716
717 if (proto != NEXTHDR_HOP) {
718 ops = rcu_dereference(inet6_protos[proto]);
719
720 if (unlikely(!ops))
721 break;
722
723 if (!(ops->flags & INET6_PROTO_GSO_EXTHDR))
724 break;
725 }
726
727 if (unlikely(!pskb_may_pull(skb, 8)))
728 break;
729
730 opth = (void *)skb->data;
731 len = ipv6_optlen(opth);
732
733 if (unlikely(!pskb_may_pull(skb, len)))
734 break;
735
736 proto = opth->nexthdr;
737 __skb_pull(skb, len);
738 }
739
787e9208 740 return proto;
662397fd
YH		 741}
742
743static int ipv6_gso_send_check(struct sk_buff *skb)
744{
745 struct ipv6hdr *ipv6h;
746 struct inet6_protocol *ops;
747 int err = -EINVAL;
748
749 if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
750 goto out;
751
752 ipv6h = ipv6_hdr(skb);
753 __skb_pull(skb, sizeof(*ipv6h));
754 err = -EPROTONOSUPPORT;
755
756 rcu_read_lock();
787e9208
HX		 757 ops = rcu_dereference(inet6_protos[
758 ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr)]);
759
662397fd
YH		 760 if (likely(ops && ops->gso_send_check)) {
761 skb_reset_transport_header(skb);
762 err = ops->gso_send_check(skb);
763 }
764 rcu_read_unlock();
765
766out:
767 return err;
768}
769
770static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, int features)
771{
772 struct sk_buff *segs = ERR_PTR(-EINVAL);
773 struct ipv6hdr *ipv6h;
774 struct inet6_protocol *ops;
ba735425
SS		 775 int proto;
776 struct frag_hdr *fptr;
777 unsigned int unfrag_ip6hlen;
778 u8 *prevhdr;
779 int offset = 0;
662397fd
YH		 780
781 if (!(features & NETIF_F_V6_CSUM))
782 features &= ~NETIF_F_SG;
783
784 if (unlikely(skb_shinfo(skb)->gso_type &
785 ~(SKB_GSO_UDP |
786 SKB_GSO_DODGY |
787 SKB_GSO_TCP_ECN |
788 SKB_GSO_TCPV6 |
789 0)))
790 goto out;
791
792 if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
793 goto out;
794
795 ipv6h = ipv6_hdr(skb);
796 __skb_pull(skb, sizeof(*ipv6h));
797 segs = ERR_PTR(-EPROTONOSUPPORT);
798
ba735425 799 proto = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
662397fd 800 rcu_read_lock();
ba735425 801 ops = rcu_dereference(inet6_protos[proto]);
662397fd
YH		 802 if (likely(ops && ops->gso_segment)) {
803 skb_reset_transport_header(skb);
804 segs = ops->gso_segment(skb, features);
805 }
806 rcu_read_unlock();
807
808 if (unlikely(IS_ERR(segs)))
809 goto out;
810
811 for (skb = segs; skb; skb = skb->next) {
812 ipv6h = ipv6_hdr(skb);
813 ipv6h->payload_len = htons(skb->len - skb->mac_len -
814 sizeof(*ipv6h));
ba735425
SS		 815 if (proto == IPPROTO_UDP) {
816 unfrag_ip6hlen = ip6_find_1stfragopt(skb, &prevhdr);
817 fptr = (struct frag_hdr *)(skb_network_header(skb) +
818 unfrag_ip6hlen);
819 fptr->frag_off = htons(offset);
820 if (skb->next != NULL)
821 fptr->frag_off |= htons(IP6_MF);
822 offset += (ntohs(ipv6h->payload_len) -
823 sizeof(struct frag_hdr));
824 }
662397fd
YH		 825 }
826
827out:
828 return segs;
829}
830
787e9208
HX		 831struct ipv6_gro_cb {
832 struct napi_gro_cb napi;
833 int proto;
834};
835
836#define IPV6_GRO_CB(skb) ((struct ipv6_gro_cb *)(skb)->cb)
837
838static struct sk_buff **ipv6_gro_receive(struct sk_buff **head,
839 struct sk_buff *skb)
840{
841 struct inet6_protocol *ops;
842 struct sk_buff **pp = NULL;
843 struct sk_buff *p;
844 struct ipv6hdr *iph;
845 unsigned int nlen;
a5b1cf28
HX		 846 unsigned int hlen;
847 unsigned int off;
787e9208
HX		 848 int flush = 1;
849 int proto;
ebad18e9 850 __wsum csum;
787e9208 851
a5b1cf28
HX		 852 off = skb_gro_offset(skb);
853 hlen = off + sizeof(*iph);
854 iph = skb_gro_header_fast(skb, off);
855 if (skb_gro_header_hard(skb, hlen)) {
856 iph = skb_gro_header_slow(skb, hlen, off);
857 if (unlikely(!iph))
858 goto out;
859 }
787e9208 860
86911732
HX		 861 skb_gro_pull(skb, sizeof(*iph));
862 skb_set_transport_header(skb, skb_gro_offset(skb));
787e9208 863
86911732 864 flush += ntohs(iph->payload_len) != skb_gro_len(skb);
787e9208
HX		 865
866 rcu_read_lock();
86911732 867 proto = iph->nexthdr;
787e9208 868 ops = rcu_dereference(inet6_protos[proto]);
86911732
HX		 869 if (!ops || !ops->gro_receive) {
870 __pskb_pull(skb, skb_gro_offset(skb));
871 proto = ipv6_gso_pull_exthdrs(skb, proto);
872 skb_gro_pull(skb, -skb_transport_offset(skb));
873 skb_reset_transport_header(skb);
874 __skb_push(skb, skb_gro_offset(skb));
875
876 if (!ops || !ops->gro_receive)
877 goto out_unlock;
878
879 iph = ipv6_hdr(skb);
880 }
881
882 IPV6_GRO_CB(skb)->proto = proto;
787e9208
HX		 883
884 flush--;
787e9208
HX		 885 nlen = skb_network_header_len(skb);
886
887 for (p = *head; p; p = p->next) {
888 struct ipv6hdr *iph2;
889
890 if (!NAPI_GRO_CB(p)->same_flow)
891 continue;
892
893 iph2 = ipv6_hdr(p);
894
895 /* All fields must match except length. */
896 if (nlen != skb_network_header_len(p) ||
897 memcmp(iph, iph2, offsetof(struct ipv6hdr, payload_len)) ||
898 memcmp(&iph->nexthdr, &iph2->nexthdr,
899 nlen - offsetof(struct ipv6hdr, nexthdr))) {
900 NAPI_GRO_CB(p)->same_flow = 0;
901 continue;
902 }
903
904 NAPI_GRO_CB(p)->flush |= flush;
905 }
906
907 NAPI_GRO_CB(skb)->flush |= flush;
908
ebad18e9
HX		 909 csum = skb->csum;
910 skb_postpull_rcsum(skb, iph, skb_network_header_len(skb));
911
787e9208
HX		 912 pp = ops->gro_receive(head, skb);
913
ebad18e9
HX		 914 skb->csum = csum;
915
787e9208
HX		 916out_unlock:
917 rcu_read_unlock();
918
919out:
920 NAPI_GRO_CB(skb)->flush |= flush;
921
922 return pp;
923}
924
925static int ipv6_gro_complete(struct sk_buff *skb)
926{
927 struct inet6_protocol *ops;
928 struct ipv6hdr *iph = ipv6_hdr(skb);
929 int err = -ENOSYS;
930
931 iph->payload_len = htons(skb->len - skb_network_offset(skb) -
932 sizeof(*iph));
933
934 rcu_read_lock();
935 ops = rcu_dereference(inet6_protos[IPV6_GRO_CB(skb)->proto]);
936 if (WARN_ON(!ops || !ops->gro_complete))
937 goto out_unlock;
938
939 err = ops->gro_complete(skb);
940
941out_unlock:
942 rcu_read_unlock();
943
944 return err;
945}
946
7546dd97 947static struct packet_type ipv6_packet_type __read_mostly = {
09640e63 948 .type = cpu_to_be16(ETH_P_IPV6),
662397fd
YH		 949 .func = ipv6_rcv,
950 .gso_send_check = ipv6_gso_send_check,
951 .gso_segment = ipv6_gso_segment,
787e9208
HX		 952 .gro_receive = ipv6_gro_receive,
953 .gro_complete = ipv6_gro_complete,
662397fd
YH		 954};
955
956static int __init ipv6_packet_init(void)
957{
958 dev_add_pack(&ipv6_packet_type);
959 return 0;
960}
961
962static void ipv6_packet_cleanup(void)
963{
964 dev_remove_pack(&ipv6_packet_type);
965}
966
e43291cb
DL		 967static int __net_init ipv6_init_mibs(struct net *net)
968{
0c7ed677
DL		 969 if (snmp_mib_init((void **)net->mib.udp_stats_in6,
970 sizeof (struct udp_mib)) < 0)
971 return -ENOMEM;
be713a44
DL		 972 if (snmp_mib_init((void **)net->mib.udplite_stats_in6,
973 sizeof (struct udp_mib)) < 0)
974 goto err_udplite_mib;
9261e537
DL		 975 if (snmp_mib_init((void **)net->mib.ipv6_statistics,
976 sizeof(struct ipstats_mib)) < 0)
977 goto err_ip_mib;
978 if (snmp_mib_init((void **)net->mib.icmpv6_statistics,
979 sizeof(struct icmpv6_mib)) < 0)
980 goto err_icmp_mib;
981 if (snmp_mib_init((void **)net->mib.icmpv6msg_statistics,
982 sizeof(struct icmpv6msg_mib)) < 0)
983 goto err_icmpmsg_mib;
e43291cb 984 return 0;
be713a44 985
9261e537
DL		 986err_icmpmsg_mib:
987 snmp_mib_free((void **)net->mib.icmpv6_statistics);
988err_icmp_mib:
989 snmp_mib_free((void **)net->mib.ipv6_statistics);
990err_ip_mib:
991 snmp_mib_free((void **)net->mib.udplite_stats_in6);
be713a44
DL		 992err_udplite_mib:
993 snmp_mib_free((void **)net->mib.udp_stats_in6);
994 return -ENOMEM;
e43291cb
DL		 995}
996
997static void __net_exit ipv6_cleanup_mibs(struct net *net)
998{
0c7ed677 999 snmp_mib_free((void **)net->mib.udp_stats_in6);
be713a44 1000 snmp_mib_free((void **)net->mib.udplite_stats_in6);
9261e537
DL		 1001 snmp_mib_free((void **)net->mib.ipv6_statistics);
1002 snmp_mib_free((void **)net->mib.icmpv6_statistics);
1003 snmp_mib_free((void **)net->mib.icmpv6msg_statistics);
e43291cb
DL		 1004}
1005
e7dc8494 1006static int __net_init inet6_net_init(struct net *net)
81c1c178 1007{
0c96d8c5
DL		 1008 int err = 0;
1009
99bc9c4e 1010 net->ipv6.sysctl.bindv6only = 0;
41a76906 1011 net->ipv6.sysctl.icmpv6_time = 1*HZ;
e71e0349 1012
e43291cb
DL		 1013 err = ipv6_init_mibs(net);
1014 if (err)
1015 return err;
0c96d8c5
DL		 1016#ifdef CONFIG_PROC_FS
1017 err = udp6_proc_init(net);
1018 if (err)
1019 goto out;
6f8b13bc
DL		 1020 err = tcp6_proc_init(net);
1021 if (err)
1022 goto proc_tcp6_fail;
6ab57e7e
DL		 1023 err = ac6_proc_init(net);
1024 if (err)
1025 goto proc_ac6_fail;
0c96d8c5
DL		 1026#endif
1027 return err;
6f8b13bc
DL		 1028
1029#ifdef CONFIG_PROC_FS
6ab57e7e
DL		 1030proc_ac6_fail:
1031 tcp6_proc_exit(net);
6f8b13bc
DL		 1032proc_tcp6_fail:
1033 udp6_proc_exit(net);
e43291cb
DL		 1034out:
1035 ipv6_cleanup_mibs(net);
1036 return err;
6f8b13bc 1037#endif
81c1c178
DL		 1038}
1039
1040static void inet6_net_exit(struct net *net)
1041{
0c96d8c5
DL		 1042#ifdef CONFIG_PROC_FS
1043 udp6_proc_exit(net);
6f8b13bc 1044 tcp6_proc_exit(net);
6ab57e7e 1045 ac6_proc_exit(net);
0c96d8c5 1046#endif
e43291cb 1047 ipv6_cleanup_mibs(net);
81c1c178
DL		 1048}
1049
1050static struct pernet_operations inet6_net_ops = {
1051 .init = inet6_net_init,
1052 .exit = inet6_net_exit,
1053};
1054
1da177e4
LT		 1055static int __init inet6_init(void)
1056{
1057 struct sk_buff *dummy_skb;
1ab1457c 1058 struct list_head *r;
fe7ca2e1 1059 int err = 0;
1da177e4 1060
ef047f5e
YH		 1061 BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > sizeof(dummy_skb->cb));
1062
fe7ca2e1
BH		 1063 /* Register the socket-side information for inet6_create. */
1064 for(r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
1065 INIT_LIST_HEAD(r);
1066
56d417b1 1067 if (disable_ipv6_mod) {
fe7ca2e1
BH		 1068 printk(KERN_INFO
1069 "IPv6: Loaded, but administratively disabled, "
1070 "reboot required to enable\n");
1071 goto out;
1072 }
1073
1da177e4
LT		 1074 err = proto_register(&tcpv6_prot, 1);
1075 if (err)
1076 goto out;
1077
1078 err = proto_register(&udpv6_prot, 1);
1079 if (err)
1080 goto out_unregister_tcp_proto;
1081
ba4e58ec 1082 err = proto_register(&udplitev6_prot, 1);
1da177e4
LT		 1083 if (err)
1084 goto out_unregister_udp_proto;
1085
ba4e58ec
GR		 1086 err = proto_register(&rawv6_prot, 1);
1087 if (err)
1088 goto out_unregister_udplite_proto;
1089
1da177e4 1090
1da177e4
LT		 1091 /* We MUST register RAW sockets before we create the ICMP6,
1092 * IGMP6, or NDISC control sockets.
1093 */
7f4e4868
DL		 1094 err = rawv6_init();
1095 if (err)
1096 goto out_unregister_raw_proto;
1da177e4
LT		 1097
1098 /* Register the family here so that the init calls below will
1099 * be able to create sockets. (?? is this dangerous ??)
1100 */
8eb55910
DM		 1101 err = sock_register(&inet6_family_ops);
1102 if (err)
7f4e4868 1103 goto out_sock_register_fail;
1da177e4 1104
eeb61f71
AV		 1105#ifdef CONFIG_SYSCTL
1106 err = ipv6_static_sysctl_register();
1107 if (err)
1108 goto static_sysctl_fail;
1109#endif
1da177e4
LT		 1110 /*
1111 * ipngwg API draft makes clear that the correct semantics
1112 * for TCP and UDP is to consider one TCP and UDP instance
1113 * in a host availiable by both INET and INET6 APIs and
1114 * able to communicate via both network protocols.
1115 */
1116
81c1c178
DL		 1117 err = register_pernet_subsys(&inet6_net_ops);
1118 if (err)
1119 goto register_pernet_fail;
9b0f976f 1120 err = icmpv6_init();
1da177e4
LT		 1121 if (err)
1122 goto icmp_fail;
623d1a1a
WC		 1123 err = ip6_mr_init();
1124 if (err)
1125 goto ipmr_fail;
9b0f976f 1126 err = ndisc_init();
1da177e4
LT		 1127 if (err)
1128 goto ndisc_fail;
9b0f976f 1129 err = igmp6_init();
1da177e4
LT		 1130 if (err)
1131 goto igmp_fail;
2cc7d573
HW		 1132 err = ipv6_netfilter_init();
1133 if (err)
1134 goto netfilter_fail;
1da177e4
LT		 1135 /* Create /proc/foo6 entries. */
1136#ifdef CONFIG_PROC_FS
1137 err = -ENOMEM;
1138 if (raw6_proc_init())
1139 goto proc_raw6_fail;
ba4e58ec
GR		 1140 if (udplite6_proc_init())
1141 goto proc_udplite6_fail;
1da177e4
LT		 1142 if (ipv6_misc_proc_init())
1143 goto proc_misc6_fail;
1da177e4
LT		 1144 if (if6_proc_init())
1145 goto proc_if6_fail;
1146#endif
e2fddf5e
DL		 1147 err = ip6_route_init();
1148 if (err)
1149 goto ip6_route_fail;
0a3e78ac
DL		 1150 err = ip6_flowlabel_init();
1151 if (err)
1152 goto ip6_flowlabel_fail;
1da177e4
LT		 1153 err = addrconf_init();
1154 if (err)
1155 goto addrconf_fail;
1da177e4
LT		 1156
1157 /* Init v6 extension headers. */
248b238d
DL		 1158 err = ipv6_exthdrs_init();
1159 if (err)
1160 goto ipv6_exthdrs_fail;
1161
853cbbaa
DL		 1162 err = ipv6_frag_init();
1163 if (err)
1164 goto ipv6_frag_fail;
1da177e4
LT		 1165
1166 /* Init v6 transport protocols. */
7f4e4868
DL		 1167 err = udpv6_init();
1168 if (err)
1169 goto udpv6_fail;
e2ed4052 1170
7f4e4868
DL		 1171 err = udplitev6_init();
1172 if (err)
1173 goto udplitev6_fail;
1174
1175 err = tcpv6_init();
1176 if (err)
1177 goto tcpv6_fail;
1178
1179 err = ipv6_packet_init();
1180 if (err)
1181 goto ipv6_packet_fail;
94911fe3
BT		 1182
1183#ifdef CONFIG_SYSCTL
1184 err = ipv6_sysctl_register();
1185 if (err)
1186 goto sysctl_fail;
1187#endif
1da177e4
LT		 1188out:
1189 return err;
1190
94911fe3
BT		 1191#ifdef CONFIG_SYSCTL
1192sysctl_fail:
1193 ipv6_packet_cleanup();
1194#endif
7f4e4868
DL		 1195ipv6_packet_fail:
1196 tcpv6_exit();
1197tcpv6_fail:
1198 udplitev6_exit();
1199udplitev6_fail:
1200 udpv6_exit();
1201udpv6_fail:
1202 ipv6_frag_exit();
853cbbaa
DL		 1203ipv6_frag_fail:
1204 ipv6_exthdrs_exit();
248b238d
DL		 1205ipv6_exthdrs_fail:
1206 addrconf_cleanup();
1da177e4
LT		 1207addrconf_fail:
1208 ip6_flowlabel_cleanup();
0a3e78ac 1209ip6_flowlabel_fail:
1da177e4 1210 ip6_route_cleanup();
e2fddf5e 1211ip6_route_fail:
1da177e4
LT		 1212#ifdef CONFIG_PROC_FS
1213 if6_proc_exit();
1214proc_if6_fail:
1da177e4
LT		 1215 ipv6_misc_proc_exit();
1216proc_misc6_fail:
ba4e58ec
GR		 1217 udplite6_proc_exit();
1218proc_udplite6_fail:
1da177e4
LT		 1219 raw6_proc_exit();
1220proc_raw6_fail:
1221#endif
2cc7d573
HW		 1222 ipv6_netfilter_fini();
1223netfilter_fail:
1da177e4
LT		 1224 igmp6_cleanup();
1225igmp_fail:
1226 ndisc_cleanup();
1227ndisc_fail:
623d1a1a
WC		 1228 ip6_mr_cleanup();
1229ipmr_fail:
1da177e4
LT		 1230 icmpv6_cleanup();
1231icmp_fail:
81c1c178
DL		 1232 unregister_pernet_subsys(&inet6_net_ops);
1233register_pernet_fail:
eeb61f71
AV		 1234#ifdef CONFIG_SYSCTL
1235 ipv6_static_sysctl_unregister();
1236static_sysctl_fail:
1237#endif
8eb55910 1238 sock_unregister(PF_INET6);
e2fddf5e 1239 rtnl_unregister_all(PF_INET6);
7f4e4868
DL		 1240out_sock_register_fail:
1241 rawv6_exit();
1da177e4
LT		 1242out_unregister_raw_proto:
1243 proto_unregister(&rawv6_prot);
ba4e58ec
GR		 1244out_unregister_udplite_proto:
1245 proto_unregister(&udplitev6_prot);
1da177e4
LT		 1246out_unregister_udp_proto:
1247 proto_unregister(&udpv6_prot);
1248out_unregister_tcp_proto:
1249 proto_unregister(&tcpv6_prot);
1250 goto out;
1251}
1252module_init(inet6_init);
1253
1254static void __exit inet6_exit(void)
1255{
56d417b1 1256 if (disable_ipv6_mod)
ff8cf9a9
JD		 1257 return;
1258
1da177e4
LT		 1259 /* First of all disallow new sockets creation. */
1260 sock_unregister(PF_INET6);
c127ea2c
TG		 1261 /* Disallow any further netlink messages */
1262 rtnl_unregister_all(PF_INET6);
ca17c233 1263
94911fe3
BT		 1264#ifdef CONFIG_SYSCTL
1265 ipv6_sysctl_unregister();
1266#endif
7f4e4868
DL		 1267 udpv6_exit();
1268 udplitev6_exit();
1269 tcpv6_exit();
1270
ca17c233
JJ		 1271 /* Cleanup code parts. */
1272 ipv6_packet_cleanup();
853cbbaa 1273 ipv6_frag_exit();
248b238d 1274 ipv6_exthdrs_exit();
ca17c233
JJ		 1275 addrconf_cleanup();
1276 ip6_flowlabel_cleanup();
1277 ip6_route_cleanup();
1da177e4 1278#ifdef CONFIG_PROC_FS
ca17c233
JJ		 1279
1280 /* Cleanup code parts. */
1da177e4 1281 if6_proc_exit();
1ab1457c 1282 ipv6_misc_proc_exit();
1ab1457c 1283 udplite6_proc_exit();
1ab1457c 1284 raw6_proc_exit();
2c8d7ca0 1285#endif
2cc7d573 1286 ipv6_netfilter_fini();
ca17c233 1287 igmp6_cleanup();
1da177e4 1288 ndisc_cleanup();
623d1a1a 1289 ip6_mr_cleanup();
1da177e4 1290 icmpv6_cleanup();
7f4e4868 1291 rawv6_exit();
94911fe3 1292
81c1c178 1293 unregister_pernet_subsys(&inet6_net_ops);
eeb61f71
AV		 1294#ifdef CONFIG_SYSCTL
1295 ipv6_static_sysctl_unregister();
1296#endif
1da177e4 1297 proto_unregister(&rawv6_prot);
ca17c233 1298 proto_unregister(&udplitev6_prot);
1da177e4
LT		 1299 proto_unregister(&udpv6_prot);
1300 proto_unregister(&tcpv6_prot);
1f2ccd00
JDB		 1301
1302 rcu_barrier(); /* Wait for completion of call_rcu()'s */
1da177e4
LT		 1303}
1304module_exit(inet6_exit);
1305
1306MODULE_ALIAS_NETPROTO(PF_INET6);
Linux 6.x block layer and io_uring tree(s)