ia64/linux-2.6.18-xen.hg

view net/ipv6/af_inet6.c @ 673:3161879fdf22

[IA64] xencomm: support XENMEM_add_to_physmap and XENMEM_remove_from_phsymap

support XENMEM_add_to_physmap and XENMEM_remove_from_phsymap.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
author Isaku Yamahata <yamahata@valinux.co.jp>
date Tue Sep 16 21:26:15 2008 +0900 (2008-09-16)
parents 831230e53067
children
line source
1 /*
2 * PF_INET6 socket protocol family
3 * Linux INET6 implementation
4 *
5 * Authors:
6 * Pedro Roque <roque@di.fc.ul.pt>
7 *
8 * Adapted from linux/net/ipv4/af_inet.c
9 *
10 * $Id: af_inet6.c,v 1.66 2002/02/01 22:01:04 davem Exp $
11 *
12 * Fixes:
13 * piggy, Karl Knutson : Socket protocol table
14 * Hideaki YOSHIFUJI : sin6_scope_id support
15 * Arnaldo Melo : check proc_net_create return, cleanups
16 *
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License
19 * as published by the Free Software Foundation; either version
20 * 2 of the License, or (at your option) any later version.
21 */
24 #include <linux/module.h>
25 #include <linux/capability.h>
26 #include <linux/errno.h>
27 #include <linux/types.h>
28 #include <linux/socket.h>
29 #include <linux/in.h>
30 #include <linux/kernel.h>
31 #include <linux/sched.h>
32 #include <linux/timer.h>
33 #include <linux/string.h>
34 #include <linux/sockios.h>
35 #include <linux/net.h>
36 #include <linux/fcntl.h>
37 #include <linux/mm.h>
38 #include <linux/interrupt.h>
39 #include <linux/proc_fs.h>
40 #include <linux/stat.h>
41 #include <linux/init.h>
43 #include <linux/inet.h>
44 #include <linux/netdevice.h>
45 #include <linux/icmpv6.h>
46 #include <linux/smp_lock.h>
47 #include <linux/netfilter_ipv6.h>
49 #include <net/ip.h>
50 #include <net/ipv6.h>
51 #include <net/udp.h>
52 #include <net/tcp.h>
53 #include <net/ipip.h>
54 #include <net/protocol.h>
55 #include <net/inet_common.h>
56 #include <net/transp_v6.h>
57 #include <net/ip6_route.h>
58 #include <net/addrconf.h>
59 #ifdef CONFIG_IPV6_TUNNEL
60 #include <net/ip6_tunnel.h>
61 #endif
63 #include <asm/uaccess.h>
64 #include <asm/system.h>
66 MODULE_AUTHOR("Cast of dozens");
67 MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
68 MODULE_LICENSE("GPL");
70 int sysctl_ipv6_bindv6only;
72 /* The inetsw table contains everything that inet_create needs to
73 * build a new socket.
74 */
75 static struct list_head inetsw6[SOCK_MAX];
76 static DEFINE_SPINLOCK(inetsw6_lock);
78 static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
79 {
80 const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
82 return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
83 }
85 static int inet6_create(struct socket *sock, int protocol)
86 {
87 struct inet_sock *inet;
88 struct ipv6_pinfo *np;
89 struct sock *sk;
90 struct list_head *p;
91 struct inet_protosw *answer;
92 struct proto *answer_prot;
93 unsigned char answer_flags;
94 char answer_no_check;
95 int try_loading_module = 0;
96 int err;
98 /* Look for the requested type/protocol pair. */
99 answer = NULL;
100 lookup_protocol:
101 err = -ESOCKTNOSUPPORT;
102 rcu_read_lock();
103 list_for_each_rcu(p, &inetsw6[sock->type]) {
104 answer = list_entry(p, struct inet_protosw, list);
106 /* Check the non-wild match. */
107 if (protocol == answer->protocol) {
108 if (protocol != IPPROTO_IP)
109 break;
110 } else {
111 /* Check for the two wild cases. */
112 if (IPPROTO_IP == protocol) {
113 protocol = answer->protocol;
114 break;
115 }
116 if (IPPROTO_IP == answer->protocol)
117 break;
118 }
119 err = -EPROTONOSUPPORT;
120 answer = NULL;
121 }
123 if (!answer) {
124 if (try_loading_module < 2) {
125 rcu_read_unlock();
126 /*
127 * Be more specific, e.g. net-pf-10-proto-132-type-1
128 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
129 */
130 if (++try_loading_module == 1)
131 request_module("net-pf-%d-proto-%d-type-%d",
132 PF_INET6, protocol, sock->type);
133 /*
134 * Fall back to generic, e.g. net-pf-10-proto-132
135 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
136 */
137 else
138 request_module("net-pf-%d-proto-%d",
139 PF_INET6, protocol);
140 goto lookup_protocol;
141 } else
142 goto out_rcu_unlock;
143 }
145 err = -EPERM;
146 if (answer->capability > 0 && !capable(answer->capability))
147 goto out_rcu_unlock;
149 sock->ops = answer->ops;
150 answer_prot = answer->prot;
151 answer_no_check = answer->no_check;
152 answer_flags = answer->flags;
153 rcu_read_unlock();
155 BUG_TRAP(answer_prot->slab != NULL);
157 err = -ENOBUFS;
158 sk = sk_alloc(PF_INET6, GFP_KERNEL, answer_prot, 1);
159 if (sk == NULL)
160 goto out;
162 sock_init_data(sock, sk);
164 err = 0;
165 sk->sk_no_check = answer_no_check;
166 if (INET_PROTOSW_REUSE & answer_flags)
167 sk->sk_reuse = 1;
169 inet = inet_sk(sk);
170 inet->is_icsk = INET_PROTOSW_ICSK & answer_flags;
172 if (SOCK_RAW == sock->type) {
173 inet->num = protocol;
174 if (IPPROTO_RAW == protocol)
175 inet->hdrincl = 1;
176 }
178 sk->sk_destruct = inet_sock_destruct;
179 sk->sk_family = PF_INET6;
180 sk->sk_protocol = protocol;
182 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
184 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
185 np->hop_limit = -1;
186 np->mcast_hops = -1;
187 np->mc_loop = 1;
188 np->pmtudisc = IPV6_PMTUDISC_WANT;
189 np->ipv6only = sysctl_ipv6_bindv6only;
191 /* Init the ipv4 part of the socket since we can have sockets
192 * using v6 API for ipv4.
193 */
194 inet->uc_ttl = -1;
196 inet->mc_loop = 1;
197 inet->mc_ttl = 1;
198 inet->mc_index = 0;
199 inet->mc_list = NULL;
201 if (ipv4_config.no_pmtu_disc)
202 inet->pmtudisc = IP_PMTUDISC_DONT;
203 else
204 inet->pmtudisc = IP_PMTUDISC_WANT;
205 /*
206 * Increment only the relevant sk_prot->socks debug field, this changes
207 * the previous behaviour of incrementing both the equivalent to
208 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
209 *
210 * This allows better debug granularity as we'll know exactly how many
211 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
212 * transport protocol socks. -acme
213 */
214 sk_refcnt_debug_inc(sk);
216 if (inet->num) {
217 /* It assumes that any protocol which allows
218 * the user to assign a number at socket
219 * creation time automatically shares.
220 */
221 inet->sport = ntohs(inet->num);
222 sk->sk_prot->hash(sk);
223 }
224 if (sk->sk_prot->init) {
225 err = sk->sk_prot->init(sk);
226 if (err) {
227 sk_common_release(sk);
228 goto out;
229 }
230 }
231 out:
232 return err;
233 out_rcu_unlock:
234 rcu_read_unlock();
235 goto out;
236 }
239 /* bind for INET6 API */
240 int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
241 {
242 struct sockaddr_in6 *addr=(struct sockaddr_in6 *)uaddr;
243 struct sock *sk = sock->sk;
244 struct inet_sock *inet = inet_sk(sk);
245 struct ipv6_pinfo *np = inet6_sk(sk);
246 __u32 v4addr = 0;
247 unsigned short snum;
248 int addr_type = 0;
249 int err = 0;
251 /* If the socket has its own bind function then use it. */
252 if (sk->sk_prot->bind)
253 return sk->sk_prot->bind(sk, uaddr, addr_len);
255 if (addr_len < SIN6_LEN_RFC2133)
256 return -EINVAL;
257 addr_type = ipv6_addr_type(&addr->sin6_addr);
258 if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM)
259 return -EINVAL;
261 snum = ntohs(addr->sin6_port);
262 if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
263 return -EACCES;
265 lock_sock(sk);
267 /* Check these errors (active socket, double bind). */
268 if (sk->sk_state != TCP_CLOSE || inet->num) {
269 err = -EINVAL;
270 goto out;
271 }
273 /* Check if the address belongs to the host. */
274 if (addr_type == IPV6_ADDR_MAPPED) {
275 v4addr = addr->sin6_addr.s6_addr32[3];
276 if (inet_addr_type(v4addr) != RTN_LOCAL) {
277 err = -EADDRNOTAVAIL;
278 goto out;
279 }
280 } else {
281 if (addr_type != IPV6_ADDR_ANY) {
282 struct net_device *dev = NULL;
284 if (addr_type & IPV6_ADDR_LINKLOCAL) {
285 if (addr_len >= sizeof(struct sockaddr_in6) &&
286 addr->sin6_scope_id) {
287 /* Override any existing binding, if another one
288 * is supplied by user.
289 */
290 sk->sk_bound_dev_if = addr->sin6_scope_id;
291 }
293 /* Binding to link-local address requires an interface */
294 if (!sk->sk_bound_dev_if) {
295 err = -EINVAL;
296 goto out;
297 }
298 dev = dev_get_by_index(sk->sk_bound_dev_if);
299 if (!dev) {
300 err = -ENODEV;
301 goto out;
302 }
303 }
305 /* ipv4 addr of the socket is invalid. Only the
306 * unspecified and mapped address have a v4 equivalent.
307 */
308 v4addr = LOOPBACK4_IPV6;
309 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
310 if (!ipv6_chk_addr(&addr->sin6_addr, dev, 0)) {
311 if (dev)
312 dev_put(dev);
313 err = -EADDRNOTAVAIL;
314 goto out;
315 }
316 }
317 if (dev)
318 dev_put(dev);
319 }
320 }
322 inet->rcv_saddr = v4addr;
323 inet->saddr = v4addr;
325 ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
327 if (!(addr_type & IPV6_ADDR_MULTICAST))
328 ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
330 /* Make sure we are allowed to bind here. */
331 if (sk->sk_prot->get_port(sk, snum)) {
332 inet_reset_saddr(sk);
333 err = -EADDRINUSE;
334 goto out;
335 }
337 if (addr_type != IPV6_ADDR_ANY)
338 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
339 if (snum)
340 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
341 inet->sport = ntohs(inet->num);
342 inet->dport = 0;
343 inet->daddr = 0;
344 out:
345 release_sock(sk);
346 return err;
347 }
349 int inet6_release(struct socket *sock)
350 {
351 struct sock *sk = sock->sk;
353 if (sk == NULL)
354 return -EINVAL;
356 /* Free mc lists */
357 ipv6_sock_mc_close(sk);
359 /* Free ac lists */
360 ipv6_sock_ac_close(sk);
362 return inet_release(sock);
363 }
365 int inet6_destroy_sock(struct sock *sk)
366 {
367 struct ipv6_pinfo *np = inet6_sk(sk);
368 struct sk_buff *skb;
369 struct ipv6_txoptions *opt;
371 /* Release rx options */
373 if ((skb = xchg(&np->pktoptions, NULL)) != NULL)
374 kfree_skb(skb);
376 /* Free flowlabels */
377 fl6_free_socklist(sk);
379 /* Free tx options */
381 if ((opt = xchg(&np->opt, NULL)) != NULL)
382 sock_kfree_s(sk, opt, opt->tot_len);
384 return 0;
385 }
387 EXPORT_SYMBOL_GPL(inet6_destroy_sock);
389 /*
390 * This does both peername and sockname.
391 */
393 int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
394 int *uaddr_len, int peer)
395 {
396 struct sockaddr_in6 *sin=(struct sockaddr_in6 *)uaddr;
397 struct sock *sk = sock->sk;
398 struct inet_sock *inet = inet_sk(sk);
399 struct ipv6_pinfo *np = inet6_sk(sk);
401 sin->sin6_family = AF_INET6;
402 sin->sin6_flowinfo = 0;
403 sin->sin6_scope_id = 0;
404 if (peer) {
405 if (!inet->dport)
406 return -ENOTCONN;
407 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
408 peer == 1)
409 return -ENOTCONN;
410 sin->sin6_port = inet->dport;
411 ipv6_addr_copy(&sin->sin6_addr, &np->daddr);
412 if (np->sndflow)
413 sin->sin6_flowinfo = np->flow_label;
414 } else {
415 if (ipv6_addr_any(&np->rcv_saddr))
416 ipv6_addr_copy(&sin->sin6_addr, &np->saddr);
417 else
418 ipv6_addr_copy(&sin->sin6_addr, &np->rcv_saddr);
420 sin->sin6_port = inet->sport;
421 }
422 if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL)
423 sin->sin6_scope_id = sk->sk_bound_dev_if;
424 *uaddr_len = sizeof(*sin);
425 return(0);
426 }
428 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
429 {
430 struct sock *sk = sock->sk;
432 switch(cmd)
433 {
434 case SIOCGSTAMP:
435 return sock_get_timestamp(sk, (struct timeval __user *)arg);
437 case SIOCADDRT:
438 case SIOCDELRT:
440 return(ipv6_route_ioctl(cmd,(void __user *)arg));
442 case SIOCSIFADDR:
443 return addrconf_add_ifaddr((void __user *) arg);
444 case SIOCDIFADDR:
445 return addrconf_del_ifaddr((void __user *) arg);
446 case SIOCSIFDSTADDR:
447 return addrconf_set_dstaddr((void __user *) arg);
448 default:
449 if (!sk->sk_prot->ioctl)
450 return -ENOIOCTLCMD;
451 return sk->sk_prot->ioctl(sk, cmd, arg);
452 }
453 /*NOTREACHED*/
454 return(0);
455 }
457 const struct proto_ops inet6_stream_ops = {
458 .family = PF_INET6,
459 .owner = THIS_MODULE,
460 .release = inet6_release,
461 .bind = inet6_bind,
462 .connect = inet_stream_connect, /* ok */
463 .socketpair = sock_no_socketpair, /* a do nothing */
464 .accept = inet_accept, /* ok */
465 .getname = inet6_getname,
466 .poll = tcp_poll, /* ok */
467 .ioctl = inet6_ioctl, /* must change */
468 .listen = inet_listen, /* ok */
469 .shutdown = inet_shutdown, /* ok */
470 .setsockopt = sock_common_setsockopt, /* ok */
471 .getsockopt = sock_common_getsockopt, /* ok */
472 .sendmsg = inet_sendmsg, /* ok */
473 .recvmsg = sock_common_recvmsg, /* ok */
474 .mmap = sock_no_mmap,
475 .sendpage = tcp_sendpage,
476 #ifdef CONFIG_COMPAT
477 .compat_setsockopt = compat_sock_common_setsockopt,
478 .compat_getsockopt = compat_sock_common_getsockopt,
479 #endif
480 };
482 const struct proto_ops inet6_dgram_ops = {
483 .family = PF_INET6,
484 .owner = THIS_MODULE,
485 .release = inet6_release,
486 .bind = inet6_bind,
487 .connect = inet_dgram_connect, /* ok */
488 .socketpair = sock_no_socketpair, /* a do nothing */
489 .accept = sock_no_accept, /* a do nothing */
490 .getname = inet6_getname,
491 .poll = udp_poll, /* ok */
492 .ioctl = inet6_ioctl, /* must change */
493 .listen = sock_no_listen, /* ok */
494 .shutdown = inet_shutdown, /* ok */
495 .setsockopt = sock_common_setsockopt, /* ok */
496 .getsockopt = sock_common_getsockopt, /* ok */
497 .sendmsg = inet_sendmsg, /* ok */
498 .recvmsg = sock_common_recvmsg, /* ok */
499 .mmap = sock_no_mmap,
500 .sendpage = sock_no_sendpage,
501 #ifdef CONFIG_COMPAT
502 .compat_setsockopt = compat_sock_common_setsockopt,
503 .compat_getsockopt = compat_sock_common_getsockopt,
504 #endif
505 };
507 static struct net_proto_family inet6_family_ops = {
508 .family = PF_INET6,
509 .create = inet6_create,
510 .owner = THIS_MODULE,
511 };
513 /* Same as inet6_dgram_ops, sans udp_poll. */
514 static const struct proto_ops inet6_sockraw_ops = {
515 .family = PF_INET6,
516 .owner = THIS_MODULE,
517 .release = inet6_release,
518 .bind = inet6_bind,
519 .connect = inet_dgram_connect, /* ok */
520 .socketpair = sock_no_socketpair, /* a do nothing */
521 .accept = sock_no_accept, /* a do nothing */
522 .getname = inet6_getname,
523 .poll = datagram_poll, /* ok */
524 .ioctl = inet6_ioctl, /* must change */
525 .listen = sock_no_listen, /* ok */
526 .shutdown = inet_shutdown, /* ok */
527 .setsockopt = sock_common_setsockopt, /* ok */
528 .getsockopt = sock_common_getsockopt, /* ok */
529 .sendmsg = inet_sendmsg, /* ok */
530 .recvmsg = sock_common_recvmsg, /* ok */
531 .mmap = sock_no_mmap,
532 .sendpage = sock_no_sendpage,
533 #ifdef CONFIG_COMPAT
534 .compat_setsockopt = compat_sock_common_setsockopt,
535 .compat_getsockopt = compat_sock_common_getsockopt,
536 #endif
537 };
539 static struct inet_protosw rawv6_protosw = {
540 .type = SOCK_RAW,
541 .protocol = IPPROTO_IP, /* wild card */
542 .prot = &rawv6_prot,
543 .ops = &inet6_sockraw_ops,
544 .capability = CAP_NET_RAW,
545 .no_check = UDP_CSUM_DEFAULT,
546 .flags = INET_PROTOSW_REUSE,
547 };
549 void
550 inet6_register_protosw(struct inet_protosw *p)
551 {
552 struct list_head *lh;
553 struct inet_protosw *answer;
554 int protocol = p->protocol;
555 struct list_head *last_perm;
557 spin_lock_bh(&inetsw6_lock);
559 if (p->type >= SOCK_MAX)
560 goto out_illegal;
562 /* If we are trying to override a permanent protocol, bail. */
563 answer = NULL;
564 last_perm = &inetsw6[p->type];
565 list_for_each(lh, &inetsw6[p->type]) {
566 answer = list_entry(lh, struct inet_protosw, list);
568 /* Check only the non-wild match. */
569 if (INET_PROTOSW_PERMANENT & answer->flags) {
570 if (protocol == answer->protocol)
571 break;
572 last_perm = lh;
573 }
575 answer = NULL;
576 }
577 if (answer)
578 goto out_permanent;
580 /* Add the new entry after the last permanent entry if any, so that
581 * the new entry does not override a permanent entry when matched with
582 * a wild-card protocol. But it is allowed to override any existing
583 * non-permanent entry. This means that when we remove this entry, the
584 * system automatically returns to the old behavior.
585 */
586 list_add_rcu(&p->list, last_perm);
587 out:
588 spin_unlock_bh(&inetsw6_lock);
589 return;
591 out_permanent:
592 printk(KERN_ERR "Attempt to override permanent protocol %d.\n",
593 protocol);
594 goto out;
596 out_illegal:
597 printk(KERN_ERR
598 "Ignoring attempt to register invalid socket type %d.\n",
599 p->type);
600 goto out;
601 }
603 void
604 inet6_unregister_protosw(struct inet_protosw *p)
605 {
606 if (INET_PROTOSW_PERMANENT & p->flags) {
607 printk(KERN_ERR
608 "Attempt to unregister permanent protocol %d.\n",
609 p->protocol);
610 } else {
611 spin_lock_bh(&inetsw6_lock);
612 list_del_rcu(&p->list);
613 spin_unlock_bh(&inetsw6_lock);
615 synchronize_net();
616 }
617 }
619 int inet6_sk_rebuild_header(struct sock *sk)
620 {
621 int err;
622 struct dst_entry *dst;
623 struct ipv6_pinfo *np = inet6_sk(sk);
625 dst = __sk_dst_check(sk, np->dst_cookie);
627 if (dst == NULL) {
628 struct inet_sock *inet = inet_sk(sk);
629 struct in6_addr *final_p = NULL, final;
630 struct flowi fl;
632 memset(&fl, 0, sizeof(fl));
633 fl.proto = sk->sk_protocol;
634 ipv6_addr_copy(&fl.fl6_dst, &np->daddr);
635 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
636 fl.fl6_flowlabel = np->flow_label;
637 fl.oif = sk->sk_bound_dev_if;
638 fl.fl_ip_dport = inet->dport;
639 fl.fl_ip_sport = inet->sport;
641 if (np->opt && np->opt->srcrt) {
642 struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt;
643 ipv6_addr_copy(&final, &fl.fl6_dst);
644 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
645 final_p = &final;
646 }
648 err = ip6_dst_lookup(sk, &dst, &fl);
649 if (err) {
650 sk->sk_route_caps = 0;
651 return err;
652 }
653 if (final_p)
654 ipv6_addr_copy(&fl.fl6_dst, final_p);
656 if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0) {
657 sk->sk_err_soft = -err;
658 return err;
659 }
661 __ip6_dst_store(sk, dst, NULL);
662 }
664 return 0;
665 }
667 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
669 int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb)
670 {
671 struct ipv6_pinfo *np = inet6_sk(sk);
672 struct inet6_skb_parm *opt = IP6CB(skb);
674 if (np->rxopt.all) {
675 if ((opt->hop && (np->rxopt.bits.hopopts ||
676 np->rxopt.bits.ohopopts)) ||
677 ((IPV6_FLOWINFO_MASK & *(u32*)skb->nh.raw) &&
678 np->rxopt.bits.rxflow) ||
679 (opt->srcrt && (np->rxopt.bits.srcrt ||
680 np->rxopt.bits.osrcrt)) ||
681 ((opt->dst1 || opt->dst0) &&
682 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
683 return 1;
684 }
685 return 0;
686 }
688 EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
690 int
691 snmp6_mib_init(void *ptr[2], size_t mibsize, size_t mibalign)
692 {
693 if (ptr == NULL)
694 return -EINVAL;
696 ptr[0] = __alloc_percpu(mibsize);
697 if (!ptr[0])
698 goto err0;
700 ptr[1] = __alloc_percpu(mibsize);
701 if (!ptr[1])
702 goto err1;
704 return 0;
706 err1:
707 free_percpu(ptr[0]);
708 ptr[0] = NULL;
709 err0:
710 return -ENOMEM;
711 }
713 void
714 snmp6_mib_free(void *ptr[2])
715 {
716 if (ptr == NULL)
717 return;
718 if (ptr[0])
719 free_percpu(ptr[0]);
720 if (ptr[1])
721 free_percpu(ptr[1]);
722 ptr[0] = ptr[1] = NULL;
723 }
725 static int __init init_ipv6_mibs(void)
726 {
727 if (snmp6_mib_init((void **)ipv6_statistics, sizeof (struct ipstats_mib),
728 __alignof__(struct ipstats_mib)) < 0)
729 goto err_ip_mib;
730 if (snmp6_mib_init((void **)icmpv6_statistics, sizeof (struct icmpv6_mib),
731 __alignof__(struct icmpv6_mib)) < 0)
732 goto err_icmp_mib;
733 if (snmp6_mib_init((void **)udp_stats_in6, sizeof (struct udp_mib),
734 __alignof__(struct udp_mib)) < 0)
735 goto err_udp_mib;
736 return 0;
738 err_udp_mib:
739 snmp6_mib_free((void **)icmpv6_statistics);
740 err_icmp_mib:
741 snmp6_mib_free((void **)ipv6_statistics);
742 err_ip_mib:
743 return -ENOMEM;
745 }
747 static void cleanup_ipv6_mibs(void)
748 {
749 snmp6_mib_free((void **)ipv6_statistics);
750 snmp6_mib_free((void **)icmpv6_statistics);
751 snmp6_mib_free((void **)udp_stats_in6);
752 }
754 static int __init inet6_init(void)
755 {
756 struct sk_buff *dummy_skb;
757 struct list_head *r;
758 int err;
760 #ifdef MODULE
761 #if 0 /* FIXME --RR */
762 if (!mod_member_present(&__this_module, can_unload))
763 return -EINVAL;
765 __this_module.can_unload = &ipv6_unload;
766 #endif
767 #endif
769 if (sizeof(struct inet6_skb_parm) > sizeof(dummy_skb->cb)) {
770 printk(KERN_CRIT "inet6_proto_init: size fault\n");
771 return -EINVAL;
772 }
774 err = proto_register(&tcpv6_prot, 1);
775 if (err)
776 goto out;
778 err = proto_register(&udpv6_prot, 1);
779 if (err)
780 goto out_unregister_tcp_proto;
782 err = proto_register(&rawv6_prot, 1);
783 if (err)
784 goto out_unregister_udp_proto;
787 /* Register the socket-side information for inet6_create. */
788 for(r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
789 INIT_LIST_HEAD(r);
791 /* We MUST register RAW sockets before we create the ICMP6,
792 * IGMP6, or NDISC control sockets.
793 */
794 inet6_register_protosw(&rawv6_protosw);
796 /* Register the family here so that the init calls below will
797 * be able to create sockets. (?? is this dangerous ??)
798 */
799 err = sock_register(&inet6_family_ops);
800 if (err)
801 goto out_unregister_raw_proto;
803 /* Initialise ipv6 mibs */
804 err = init_ipv6_mibs();
805 if (err)
806 goto out_unregister_sock;
808 /*
809 * ipngwg API draft makes clear that the correct semantics
810 * for TCP and UDP is to consider one TCP and UDP instance
811 * in a host availiable by both INET and INET6 APIs and
812 * able to communicate via both network protocols.
813 */
815 #ifdef CONFIG_SYSCTL
816 ipv6_sysctl_register();
817 #endif
818 err = icmpv6_init(&inet6_family_ops);
819 if (err)
820 goto icmp_fail;
821 err = ndisc_init(&inet6_family_ops);
822 if (err)
823 goto ndisc_fail;
824 err = igmp6_init(&inet6_family_ops);
825 if (err)
826 goto igmp_fail;
827 err = ipv6_netfilter_init();
828 if (err)
829 goto netfilter_fail;
830 /* Create /proc/foo6 entries. */
831 #ifdef CONFIG_PROC_FS
832 err = -ENOMEM;
833 if (raw6_proc_init())
834 goto proc_raw6_fail;
835 if (tcp6_proc_init())
836 goto proc_tcp6_fail;
837 if (udp6_proc_init())
838 goto proc_udp6_fail;
839 if (ipv6_misc_proc_init())
840 goto proc_misc6_fail;
842 if (ac6_proc_init())
843 goto proc_anycast6_fail;
844 if (if6_proc_init())
845 goto proc_if6_fail;
846 #endif
847 ip6_route_init();
848 ip6_flowlabel_init();
849 err = addrconf_init();
850 if (err)
851 goto addrconf_fail;
852 sit_init();
854 /* Init v6 extension headers. */
855 ipv6_rthdr_init();
856 ipv6_frag_init();
857 ipv6_nodata_init();
858 ipv6_destopt_init();
860 /* Init v6 transport protocols. */
861 udpv6_init();
862 tcpv6_init();
864 ipv6_packet_init();
865 err = 0;
866 out:
867 return err;
869 addrconf_fail:
870 ip6_flowlabel_cleanup();
871 ip6_route_cleanup();
872 #ifdef CONFIG_PROC_FS
873 if6_proc_exit();
874 proc_if6_fail:
875 ac6_proc_exit();
876 proc_anycast6_fail:
877 ipv6_misc_proc_exit();
878 proc_misc6_fail:
879 udp6_proc_exit();
880 proc_udp6_fail:
881 tcp6_proc_exit();
882 proc_tcp6_fail:
883 raw6_proc_exit();
884 proc_raw6_fail:
885 #endif
886 ipv6_netfilter_fini();
887 netfilter_fail:
888 igmp6_cleanup();
889 igmp_fail:
890 ndisc_cleanup();
891 ndisc_fail:
892 icmpv6_cleanup();
893 icmp_fail:
894 #ifdef CONFIG_SYSCTL
895 ipv6_sysctl_unregister();
896 #endif
897 cleanup_ipv6_mibs();
898 out_unregister_sock:
899 sock_unregister(PF_INET6);
900 out_unregister_raw_proto:
901 proto_unregister(&rawv6_prot);
902 out_unregister_udp_proto:
903 proto_unregister(&udpv6_prot);
904 out_unregister_tcp_proto:
905 proto_unregister(&tcpv6_prot);
906 goto out;
907 }
908 module_init(inet6_init);
910 static void __exit inet6_exit(void)
911 {
912 /* First of all disallow new sockets creation. */
913 sock_unregister(PF_INET6);
914 #ifdef CONFIG_PROC_FS
915 if6_proc_exit();
916 ac6_proc_exit();
917 ipv6_misc_proc_exit();
918 udp6_proc_exit();
919 tcp6_proc_exit();
920 raw6_proc_exit();
921 #endif
922 /* Cleanup code parts. */
923 sit_cleanup();
924 ip6_flowlabel_cleanup();
925 addrconf_cleanup();
926 ip6_route_cleanup();
927 ipv6_packet_cleanup();
928 igmp6_cleanup();
929 ipv6_netfilter_fini();
930 ndisc_cleanup();
931 icmpv6_cleanup();
932 #ifdef CONFIG_SYSCTL
933 ipv6_sysctl_unregister();
934 #endif
935 cleanup_ipv6_mibs();
936 proto_unregister(&rawv6_prot);
937 proto_unregister(&udpv6_prot);
938 proto_unregister(&tcpv6_prot);
939 }
940 module_exit(inet6_exit);
942 MODULE_ALIAS_NETPROTO(PF_INET6);