2 * PF_INET6 socket protocol family
3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
8 * Adapted from linux/net/ipv4/af_inet.c
11 * piggy, Karl Knutson : Socket protocol table
12 * Hideaki YOSHIFUJI : sin6_scope_id support
13 * Arnaldo Melo : check proc_net_create return, cleanups
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.
22 #include <linux/module.h>
23 #include <linux/capability.h>
24 #include <linux/errno.h>
25 #include <linux/types.h>
26 #include <linux/socket.h>
28 #include <linux/kernel.h>
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>
35 #include <linux/interrupt.h>
36 #include <linux/proc_fs.h>
37 #include <linux/stat.h>
38 #include <linux/init.h>
39 #include <linux/slab.h>
41 #include <linux/inet.h>
42 #include <linux/netdevice.h>
43 #include <linux/icmpv6.h>
44 #include <linux/netfilter_ipv6.h>
49 #include <net/udplite.h>
52 #include <net/protocol.h>
53 #include <net/inet_common.h>
54 #include <net/route.h>
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>
62 #include <asm/uaccess.h>
63 #include <asm/system.h>
64 #include <linux/mroute6.h>
66 MODULE_AUTHOR("Cast of dozens");
67 MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
68 MODULE_LICENSE("GPL");
70 /* The inetsw6 table contains everything that inet6_create needs to
73 static struct list_head inetsw6[SOCK_MAX];
74 static DEFINE_SPINLOCK(inetsw6_lock);
76 struct ipv6_params ipv6_defaults = {
81 static int disable_ipv6_mod = 0;
83 module_param_named(disable, disable_ipv6_mod, int, 0444);
84 MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional");
86 module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444);
87 MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces");
89 module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444);
90 MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces");
92 static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
94 const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
96 return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
99 static int inet6_create(struct net *net, struct socket *sock, int protocol,
102 struct inet_sock *inet;
103 struct ipv6_pinfo *np;
105 struct inet_protosw *answer;
106 struct proto *answer_prot;
107 unsigned char answer_flags;
108 char answer_no_check;
109 int try_loading_module = 0;
112 if (sock->type != SOCK_RAW &&
113 sock->type != SOCK_DGRAM &&
115 build_ehash_secret();
117 /* Look for the requested type/protocol pair. */
119 err = -ESOCKTNOSUPPORT;
121 list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
124 /* Check the non-wild match. */
125 if (protocol == answer->protocol) {
126 if (protocol != IPPROTO_IP)
129 /* Check for the two wild cases. */
130 if (IPPROTO_IP == protocol) {
131 protocol = answer->protocol;
134 if (IPPROTO_IP == answer->protocol)
137 err = -EPROTONOSUPPORT;
141 if (try_loading_module < 2) {
144 * Be more specific, e.g. net-pf-10-proto-132-type-1
145 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
147 if (++try_loading_module == 1)
148 request_module("net-pf-%d-proto-%d-type-%d",
149 PF_INET6, protocol, sock->type);
151 * Fall back to generic, e.g. net-pf-10-proto-132
152 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
155 request_module("net-pf-%d-proto-%d",
157 goto lookup_protocol;
163 if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW))
166 sock->ops = answer->ops;
167 answer_prot = answer->prot;
168 answer_no_check = answer->no_check;
169 answer_flags = answer->flags;
172 WARN_ON(answer_prot->slab == NULL);
175 sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot);
179 sock_init_data(sock, sk);
182 sk->sk_no_check = answer_no_check;
183 if (INET_PROTOSW_REUSE & answer_flags)
187 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
189 if (SOCK_RAW == sock->type) {
190 inet->inet_num = protocol;
191 if (IPPROTO_RAW == protocol)
195 sk->sk_destruct = inet_sock_destruct;
196 sk->sk_family = PF_INET6;
197 sk->sk_protocol = protocol;
199 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
201 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
203 np->mcast_hops = IPV6_DEFAULT_MCASTHOPS;
205 np->pmtudisc = IPV6_PMTUDISC_WANT;
206 np->ipv6only = net->ipv6.sysctl.bindv6only;
208 /* Init the ipv4 part of the socket since we can have sockets
209 * using v6 API for ipv4.
216 inet->mc_list = NULL;
219 if (ipv4_config.no_pmtu_disc)
220 inet->pmtudisc = IP_PMTUDISC_DONT;
222 inet->pmtudisc = IP_PMTUDISC_WANT;
224 * Increment only the relevant sk_prot->socks debug field, this changes
225 * the previous behaviour of incrementing both the equivalent to
226 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
228 * This allows better debug granularity as we'll know exactly how many
229 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
230 * transport protocol socks. -acme
232 sk_refcnt_debug_inc(sk);
234 if (inet->inet_num) {
235 /* It assumes that any protocol which allows
236 * the user to assign a number at socket
237 * creation time automatically shares.
239 inet->inet_sport = htons(inet->inet_num);
240 sk->sk_prot->hash(sk);
242 if (sk->sk_prot->init) {
243 err = sk->sk_prot->init(sk);
245 sk_common_release(sk);
257 /* bind for INET6 API */
258 int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
260 struct sockaddr_in6 *addr=(struct sockaddr_in6 *)uaddr;
261 struct sock *sk = sock->sk;
262 struct inet_sock *inet = inet_sk(sk);
263 struct ipv6_pinfo *np = inet6_sk(sk);
264 struct net *net = sock_net(sk);
270 /* If the socket has its own bind function then use it. */
271 if (sk->sk_prot->bind)
272 return sk->sk_prot->bind(sk, uaddr, addr_len);
274 if (addr_len < SIN6_LEN_RFC2133)
277 if (addr->sin6_family != AF_INET6)
278 return -EAFNOSUPPORT;
280 addr_type = ipv6_addr_type(&addr->sin6_addr);
281 if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM)
284 snum = ntohs(addr->sin6_port);
285 if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
290 /* Check these errors (active socket, double bind). */
291 if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
296 /* Check if the address belongs to the host. */
297 if (addr_type == IPV6_ADDR_MAPPED) {
300 /* Binding to v4-mapped address on a v6-only socket
308 /* Reproduce AF_INET checks to make the bindings consistent */
309 v4addr = addr->sin6_addr.s6_addr32[3];
310 chk_addr_ret = inet_addr_type(net, v4addr);
311 if (!sysctl_ip_nonlocal_bind &&
312 !(inet->freebind || inet->transparent) &&
313 v4addr != htonl(INADDR_ANY) &&
314 chk_addr_ret != RTN_LOCAL &&
315 chk_addr_ret != RTN_MULTICAST &&
316 chk_addr_ret != RTN_BROADCAST) {
317 err = -EADDRNOTAVAIL;
321 if (addr_type != IPV6_ADDR_ANY) {
322 struct net_device *dev = NULL;
325 if (addr_type & IPV6_ADDR_LINKLOCAL) {
326 if (addr_len >= sizeof(struct sockaddr_in6) &&
327 addr->sin6_scope_id) {
328 /* Override any existing binding, if another one
329 * is supplied by user.
331 sk->sk_bound_dev_if = addr->sin6_scope_id;
334 /* Binding to link-local address requires an interface */
335 if (!sk->sk_bound_dev_if) {
339 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
346 /* ipv4 addr of the socket is invalid. Only the
347 * unspecified and mapped address have a v4 equivalent.
349 v4addr = LOOPBACK4_IPV6;
350 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
351 if (!(inet->freebind || inet->transparent) &&
352 !ipv6_chk_addr(net, &addr->sin6_addr,
354 err = -EADDRNOTAVAIL;
362 inet->inet_rcv_saddr = v4addr;
363 inet->inet_saddr = v4addr;
365 np->rcv_saddr = addr->sin6_addr;
367 if (!(addr_type & IPV6_ADDR_MULTICAST))
368 np->saddr = addr->sin6_addr;
370 /* Make sure we are allowed to bind here. */
371 if (sk->sk_prot->get_port(sk, snum)) {
372 inet_reset_saddr(sk);
377 if (addr_type != IPV6_ADDR_ANY) {
378 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
379 if (addr_type != IPV6_ADDR_MAPPED)
383 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
384 inet->inet_sport = htons(inet->inet_num);
385 inet->inet_dport = 0;
386 inet->inet_daddr = 0;
395 EXPORT_SYMBOL(inet6_bind);
397 int inet6_release(struct socket *sock)
399 struct sock *sk = sock->sk;
405 ipv6_sock_mc_close(sk);
408 ipv6_sock_ac_close(sk);
410 return inet_release(sock);
413 EXPORT_SYMBOL(inet6_release);
415 void inet6_destroy_sock(struct sock *sk)
417 struct ipv6_pinfo *np = inet6_sk(sk);
419 struct ipv6_txoptions *opt;
421 /* Release rx options */
423 if ((skb = xchg(&np->pktoptions, NULL)) != NULL)
426 if ((skb = xchg(&np->rxpmtu, NULL)) != NULL)
429 /* Free flowlabels */
430 fl6_free_socklist(sk);
432 /* Free tx options */
434 if ((opt = xchg(&np->opt, NULL)) != NULL)
435 sock_kfree_s(sk, opt, opt->tot_len);
438 EXPORT_SYMBOL_GPL(inet6_destroy_sock);
441 * This does both peername and sockname.
444 int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
445 int *uaddr_len, int peer)
447 struct sockaddr_in6 *sin=(struct sockaddr_in6 *)uaddr;
448 struct sock *sk = sock->sk;
449 struct inet_sock *inet = inet_sk(sk);
450 struct ipv6_pinfo *np = inet6_sk(sk);
452 sin->sin6_family = AF_INET6;
453 sin->sin6_flowinfo = 0;
454 sin->sin6_scope_id = 0;
456 if (!inet->inet_dport)
458 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
461 sin->sin6_port = inet->inet_dport;
462 sin->sin6_addr = np->daddr;
464 sin->sin6_flowinfo = np->flow_label;
466 if (ipv6_addr_any(&np->rcv_saddr))
467 sin->sin6_addr = np->saddr;
469 sin->sin6_addr = np->rcv_saddr;
471 sin->sin6_port = inet->inet_sport;
473 if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL)
474 sin->sin6_scope_id = sk->sk_bound_dev_if;
475 *uaddr_len = sizeof(*sin);
479 EXPORT_SYMBOL(inet6_getname);
481 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
483 struct sock *sk = sock->sk;
484 struct net *net = sock_net(sk);
489 return sock_get_timestamp(sk, (struct timeval __user *)arg);
492 return sock_get_timestampns(sk, (struct timespec __user *)arg);
497 return ipv6_route_ioctl(net, cmd, (void __user *)arg);
500 return addrconf_add_ifaddr(net, (void __user *) arg);
502 return addrconf_del_ifaddr(net, (void __user *) arg);
504 return addrconf_set_dstaddr(net, (void __user *) arg);
506 if (!sk->sk_prot->ioctl)
508 return sk->sk_prot->ioctl(sk, cmd, arg);
514 EXPORT_SYMBOL(inet6_ioctl);
516 const struct proto_ops inet6_stream_ops = {
518 .owner = THIS_MODULE,
519 .release = inet6_release,
521 .connect = inet_stream_connect, /* ok */
522 .socketpair = sock_no_socketpair, /* a do nothing */
523 .accept = inet_accept, /* ok */
524 .getname = inet6_getname,
525 .poll = tcp_poll, /* ok */
526 .ioctl = inet6_ioctl, /* must change */
527 .listen = inet_listen, /* ok */
528 .shutdown = inet_shutdown, /* ok */
529 .setsockopt = sock_common_setsockopt, /* ok */
530 .getsockopt = sock_common_getsockopt, /* ok */
531 .sendmsg = inet_sendmsg, /* ok */
532 .recvmsg = inet_recvmsg, /* ok */
533 .mmap = sock_no_mmap,
534 .sendpage = inet_sendpage,
535 .splice_read = tcp_splice_read,
537 .compat_setsockopt = compat_sock_common_setsockopt,
538 .compat_getsockopt = compat_sock_common_getsockopt,
542 const struct proto_ops inet6_dgram_ops = {
544 .owner = THIS_MODULE,
545 .release = inet6_release,
547 .connect = inet_dgram_connect, /* ok */
548 .socketpair = sock_no_socketpair, /* a do nothing */
549 .accept = sock_no_accept, /* a do nothing */
550 .getname = inet6_getname,
551 .poll = udp_poll, /* ok */
552 .ioctl = inet6_ioctl, /* must change */
553 .listen = sock_no_listen, /* ok */
554 .shutdown = inet_shutdown, /* ok */
555 .setsockopt = sock_common_setsockopt, /* ok */
556 .getsockopt = sock_common_getsockopt, /* ok */
557 .sendmsg = inet_sendmsg, /* ok */
558 .recvmsg = inet_recvmsg, /* ok */
559 .mmap = sock_no_mmap,
560 .sendpage = sock_no_sendpage,
562 .compat_setsockopt = compat_sock_common_setsockopt,
563 .compat_getsockopt = compat_sock_common_getsockopt,
567 static const struct net_proto_family inet6_family_ops = {
569 .create = inet6_create,
570 .owner = THIS_MODULE,
573 int inet6_register_protosw(struct inet_protosw *p)
575 struct list_head *lh;
576 struct inet_protosw *answer;
577 struct list_head *last_perm;
578 int protocol = p->protocol;
581 spin_lock_bh(&inetsw6_lock);
584 if (p->type >= SOCK_MAX)
587 /* If we are trying to override a permanent protocol, bail. */
590 last_perm = &inetsw6[p->type];
591 list_for_each(lh, &inetsw6[p->type]) {
592 answer = list_entry(lh, struct inet_protosw, list);
594 /* Check only the non-wild match. */
595 if (INET_PROTOSW_PERMANENT & answer->flags) {
596 if (protocol == answer->protocol)
606 /* Add the new entry after the last permanent entry if any, so that
607 * the new entry does not override a permanent entry when matched with
608 * a wild-card protocol. But it is allowed to override any existing
609 * non-permanent entry. This means that when we remove this entry, the
610 * system automatically returns to the old behavior.
612 list_add_rcu(&p->list, last_perm);
615 spin_unlock_bh(&inetsw6_lock);
619 printk(KERN_ERR "Attempt to override permanent protocol %d.\n",
625 "Ignoring attempt to register invalid socket type %d.\n",
630 EXPORT_SYMBOL(inet6_register_protosw);
633 inet6_unregister_protosw(struct inet_protosw *p)
635 if (INET_PROTOSW_PERMANENT & p->flags) {
637 "Attempt to unregister permanent protocol %d.\n",
640 spin_lock_bh(&inetsw6_lock);
641 list_del_rcu(&p->list);
642 spin_unlock_bh(&inetsw6_lock);
648 EXPORT_SYMBOL(inet6_unregister_protosw);
650 int inet6_sk_rebuild_header(struct sock *sk)
652 struct ipv6_pinfo *np = inet6_sk(sk);
653 struct dst_entry *dst;
655 dst = __sk_dst_check(sk, np->dst_cookie);
658 struct inet_sock *inet = inet_sk(sk);
659 struct in6_addr *final_p, final;
662 memset(&fl6, 0, sizeof(fl6));
663 fl6.flowi6_proto = sk->sk_protocol;
664 fl6.daddr = np->daddr;
665 fl6.saddr = np->saddr;
666 fl6.flowlabel = np->flow_label;
667 fl6.flowi6_oif = sk->sk_bound_dev_if;
668 fl6.flowi6_mark = sk->sk_mark;
669 fl6.fl6_dport = inet->inet_dport;
670 fl6.fl6_sport = inet->inet_sport;
671 security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
673 final_p = fl6_update_dst(&fl6, np->opt, &final);
675 dst = ip6_dst_lookup_flow(sk, &fl6, final_p, false);
677 sk->sk_route_caps = 0;
678 sk->sk_err_soft = -PTR_ERR(dst);
682 __ip6_dst_store(sk, dst, NULL, NULL);
688 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
690 int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb)
692 struct ipv6_pinfo *np = inet6_sk(sk);
693 struct inet6_skb_parm *opt = IP6CB(skb);
696 if ((opt->hop && (np->rxopt.bits.hopopts ||
697 np->rxopt.bits.ohopopts)) ||
698 ((IPV6_FLOWINFO_MASK &
699 *(__be32 *)skb_network_header(skb)) &&
700 np->rxopt.bits.rxflow) ||
701 (opt->srcrt && (np->rxopt.bits.srcrt ||
702 np->rxopt.bits.osrcrt)) ||
703 ((opt->dst1 || opt->dst0) &&
704 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
710 EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
712 static int ipv6_gso_pull_exthdrs(struct sk_buff *skb, int proto)
714 const struct inet6_protocol *ops = NULL;
717 struct ipv6_opt_hdr *opth;
720 if (proto != NEXTHDR_HOP) {
721 ops = rcu_dereference(inet6_protos[proto]);
726 if (!(ops->flags & INET6_PROTO_GSO_EXTHDR))
730 if (unlikely(!pskb_may_pull(skb, 8)))
733 opth = (void *)skb->data;
734 len = ipv6_optlen(opth);
736 if (unlikely(!pskb_may_pull(skb, len)))
739 proto = opth->nexthdr;
740 __skb_pull(skb, len);
746 static int ipv6_gso_send_check(struct sk_buff *skb)
748 const struct ipv6hdr *ipv6h;
749 const struct inet6_protocol *ops;
752 if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
755 ipv6h = ipv6_hdr(skb);
756 __skb_pull(skb, sizeof(*ipv6h));
757 err = -EPROTONOSUPPORT;
760 ops = rcu_dereference(inet6_protos[
761 ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr)]);
763 if (likely(ops && ops->gso_send_check)) {
764 skb_reset_transport_header(skb);
765 err = ops->gso_send_check(skb);
773 static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb,
774 netdev_features_t features)
776 struct sk_buff *segs = ERR_PTR(-EINVAL);
777 struct ipv6hdr *ipv6h;
778 const struct inet6_protocol *ops;
780 struct frag_hdr *fptr;
781 unsigned int unfrag_ip6hlen;
785 if (!(features & NETIF_F_V6_CSUM))
786 features &= ~NETIF_F_SG;
788 if (unlikely(skb_shinfo(skb)->gso_type &
796 if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
799 ipv6h = ipv6_hdr(skb);
800 __skb_pull(skb, sizeof(*ipv6h));
801 segs = ERR_PTR(-EPROTONOSUPPORT);
803 proto = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
805 ops = rcu_dereference(inet6_protos[proto]);
806 if (likely(ops && ops->gso_segment)) {
807 skb_reset_transport_header(skb);
808 segs = ops->gso_segment(skb, features);
815 for (skb = segs; skb; skb = skb->next) {
816 ipv6h = ipv6_hdr(skb);
817 ipv6h->payload_len = htons(skb->len - skb->mac_len -
819 if (proto == IPPROTO_UDP) {
820 unfrag_ip6hlen = ip6_find_1stfragopt(skb, &prevhdr);
821 fptr = (struct frag_hdr *)(skb_network_header(skb) +
823 fptr->frag_off = htons(offset);
824 if (skb->next != NULL)
825 fptr->frag_off |= htons(IP6_MF);
826 offset += (ntohs(ipv6h->payload_len) -
827 sizeof(struct frag_hdr));
836 struct napi_gro_cb napi;
840 #define IPV6_GRO_CB(skb) ((struct ipv6_gro_cb *)(skb)->cb)
842 static struct sk_buff **ipv6_gro_receive(struct sk_buff **head,
845 const struct inet6_protocol *ops;
846 struct sk_buff **pp = NULL;
856 off = skb_gro_offset(skb);
857 hlen = off + sizeof(*iph);
858 iph = skb_gro_header_fast(skb, off);
859 if (skb_gro_header_hard(skb, hlen)) {
860 iph = skb_gro_header_slow(skb, hlen, off);
865 skb_gro_pull(skb, sizeof(*iph));
866 skb_set_transport_header(skb, skb_gro_offset(skb));
868 flush += ntohs(iph->payload_len) != skb_gro_len(skb);
871 proto = iph->nexthdr;
872 ops = rcu_dereference(inet6_protos[proto]);
873 if (!ops || !ops->gro_receive) {
874 __pskb_pull(skb, skb_gro_offset(skb));
875 proto = ipv6_gso_pull_exthdrs(skb, proto);
876 skb_gro_pull(skb, -skb_transport_offset(skb));
877 skb_reset_transport_header(skb);
878 __skb_push(skb, skb_gro_offset(skb));
880 ops = rcu_dereference(inet6_protos[proto]);
881 if (!ops || !ops->gro_receive)
887 IPV6_GRO_CB(skb)->proto = proto;
890 nlen = skb_network_header_len(skb);
892 for (p = *head; p; p = p->next) {
893 struct ipv6hdr *iph2;
895 if (!NAPI_GRO_CB(p)->same_flow)
900 /* All fields must match except length. */
901 if (nlen != skb_network_header_len(p) ||
902 memcmp(iph, iph2, offsetof(struct ipv6hdr, payload_len)) ||
903 memcmp(&iph->nexthdr, &iph2->nexthdr,
904 nlen - offsetof(struct ipv6hdr, nexthdr))) {
905 NAPI_GRO_CB(p)->same_flow = 0;
909 NAPI_GRO_CB(p)->flush |= flush;
912 NAPI_GRO_CB(skb)->flush |= flush;
915 skb_postpull_rcsum(skb, iph, skb_network_header_len(skb));
917 pp = ops->gro_receive(head, skb);
925 NAPI_GRO_CB(skb)->flush |= flush;
930 static int ipv6_gro_complete(struct sk_buff *skb)
932 const struct inet6_protocol *ops;
933 struct ipv6hdr *iph = ipv6_hdr(skb);
936 iph->payload_len = htons(skb->len - skb_network_offset(skb) -
940 ops = rcu_dereference(inet6_protos[IPV6_GRO_CB(skb)->proto]);
941 if (WARN_ON(!ops || !ops->gro_complete))
944 err = ops->gro_complete(skb);
952 static struct packet_type ipv6_packet_type __read_mostly = {
953 .type = cpu_to_be16(ETH_P_IPV6),
955 .gso_send_check = ipv6_gso_send_check,
956 .gso_segment = ipv6_gso_segment,
957 .gro_receive = ipv6_gro_receive,
958 .gro_complete = ipv6_gro_complete,
961 static int __init ipv6_packet_init(void)
963 dev_add_pack(&ipv6_packet_type);
967 static void ipv6_packet_cleanup(void)
969 dev_remove_pack(&ipv6_packet_type);
972 static int __net_init ipv6_init_mibs(struct net *net)
974 if (snmp_mib_init((void __percpu **)net->mib.udp_stats_in6,
975 sizeof(struct udp_mib),
976 __alignof__(struct udp_mib)) < 0)
978 if (snmp_mib_init((void __percpu **)net->mib.udplite_stats_in6,
979 sizeof(struct udp_mib),
980 __alignof__(struct udp_mib)) < 0)
981 goto err_udplite_mib;
982 if (snmp_mib_init((void __percpu **)net->mib.ipv6_statistics,
983 sizeof(struct ipstats_mib),
984 __alignof__(struct ipstats_mib)) < 0)
986 if (snmp_mib_init((void __percpu **)net->mib.icmpv6_statistics,
987 sizeof(struct icmpv6_mib),
988 __alignof__(struct icmpv6_mib)) < 0)
990 net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib),
992 if (!net->mib.icmpv6msg_statistics)
993 goto err_icmpmsg_mib;
997 snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics);
999 snmp_mib_free((void __percpu **)net->mib.ipv6_statistics);
1001 snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6);
1003 snmp_mib_free((void __percpu **)net->mib.udp_stats_in6);
1007 static void ipv6_cleanup_mibs(struct net *net)
1009 snmp_mib_free((void __percpu **)net->mib.udp_stats_in6);
1010 snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6);
1011 snmp_mib_free((void __percpu **)net->mib.ipv6_statistics);
1012 snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics);
1013 kfree(net->mib.icmpv6msg_statistics);
1016 static int __net_init inet6_net_init(struct net *net)
1020 net->ipv6.sysctl.bindv6only = 0;
1021 net->ipv6.sysctl.icmpv6_time = 1*HZ;
1023 err = ipv6_init_mibs(net);
1026 #ifdef CONFIG_PROC_FS
1027 err = udp6_proc_init(net);
1030 err = tcp6_proc_init(net);
1032 goto proc_tcp6_fail;
1033 err = ac6_proc_init(net);
1039 #ifdef CONFIG_PROC_FS
1041 tcp6_proc_exit(net);
1043 udp6_proc_exit(net);
1045 ipv6_cleanup_mibs(net);
1050 static void __net_exit inet6_net_exit(struct net *net)
1052 #ifdef CONFIG_PROC_FS
1053 udp6_proc_exit(net);
1054 tcp6_proc_exit(net);
1057 ipv6_cleanup_mibs(net);
1060 static struct pernet_operations inet6_net_ops = {
1061 .init = inet6_net_init,
1062 .exit = inet6_net_exit,
1065 static int __init inet6_init(void)
1067 struct sk_buff *dummy_skb;
1068 struct list_head *r;
1071 BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > sizeof(dummy_skb->cb));
1073 /* Register the socket-side information for inet6_create. */
1074 for(r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
1077 if (disable_ipv6_mod) {
1079 "IPv6: Loaded, but administratively disabled, "
1080 "reboot required to enable\n");
1084 err = proto_register(&tcpv6_prot, 1);
1088 err = proto_register(&udpv6_prot, 1);
1090 goto out_unregister_tcp_proto;
1092 err = proto_register(&udplitev6_prot, 1);
1094 goto out_unregister_udp_proto;
1096 err = proto_register(&rawv6_prot, 1);
1098 goto out_unregister_udplite_proto;
1101 /* We MUST register RAW sockets before we create the ICMP6,
1102 * IGMP6, or NDISC control sockets.
1106 goto out_unregister_raw_proto;
1108 /* Register the family here so that the init calls below will
1109 * be able to create sockets. (?? is this dangerous ??)
1111 err = sock_register(&inet6_family_ops);
1113 goto out_sock_register_fail;
1115 #ifdef CONFIG_SYSCTL
1116 err = ipv6_static_sysctl_register();
1118 goto static_sysctl_fail;
1120 tcpv6_prot.sysctl_mem = init_net.ipv4.sysctl_tcp_mem;
1123 * ipngwg API draft makes clear that the correct semantics
1124 * for TCP and UDP is to consider one TCP and UDP instance
1125 * in a host available by both INET and INET6 APIs and
1126 * able to communicate via both network protocols.
1129 err = register_pernet_subsys(&inet6_net_ops);
1131 goto register_pernet_fail;
1132 err = icmpv6_init();
1135 err = ip6_mr_init();
1144 err = ipv6_netfilter_init();
1146 goto netfilter_fail;
1147 /* Create /proc/foo6 entries. */
1148 #ifdef CONFIG_PROC_FS
1150 if (raw6_proc_init())
1151 goto proc_raw6_fail;
1152 if (udplite6_proc_init())
1153 goto proc_udplite6_fail;
1154 if (ipv6_misc_proc_init())
1155 goto proc_misc6_fail;
1156 if (if6_proc_init())
1159 err = ip6_route_init();
1161 goto ip6_route_fail;
1162 err = ip6_flowlabel_init();
1164 goto ip6_flowlabel_fail;
1165 err = addrconf_init();
1169 /* Init v6 extension headers. */
1170 err = ipv6_exthdrs_init();
1172 goto ipv6_exthdrs_fail;
1174 err = ipv6_frag_init();
1176 goto ipv6_frag_fail;
1178 /* Init v6 transport protocols. */
1183 err = udplitev6_init();
1185 goto udplitev6_fail;
1191 err = ipv6_packet_init();
1193 goto ipv6_packet_fail;
1195 #ifdef CONFIG_SYSCTL
1196 err = ipv6_sysctl_register();
1203 #ifdef CONFIG_SYSCTL
1205 ipv6_packet_cleanup();
1216 ipv6_exthdrs_exit();
1220 ip6_flowlabel_cleanup();
1222 ip6_route_cleanup();
1224 #ifdef CONFIG_PROC_FS
1227 ipv6_misc_proc_exit();
1229 udplite6_proc_exit();
1234 ipv6_netfilter_fini();
1244 unregister_pernet_subsys(&inet6_net_ops);
1245 register_pernet_fail:
1246 #ifdef CONFIG_SYSCTL
1247 ipv6_static_sysctl_unregister();
1250 sock_unregister(PF_INET6);
1251 rtnl_unregister_all(PF_INET6);
1252 out_sock_register_fail:
1254 out_unregister_raw_proto:
1255 proto_unregister(&rawv6_prot);
1256 out_unregister_udplite_proto:
1257 proto_unregister(&udplitev6_prot);
1258 out_unregister_udp_proto:
1259 proto_unregister(&udpv6_prot);
1260 out_unregister_tcp_proto:
1261 proto_unregister(&tcpv6_prot);
1264 module_init(inet6_init);
1266 static void __exit inet6_exit(void)
1268 if (disable_ipv6_mod)
1271 /* First of all disallow new sockets creation. */
1272 sock_unregister(PF_INET6);
1273 /* Disallow any further netlink messages */
1274 rtnl_unregister_all(PF_INET6);
1276 #ifdef CONFIG_SYSCTL
1277 ipv6_sysctl_unregister();
1283 /* Cleanup code parts. */
1284 ipv6_packet_cleanup();
1286 ipv6_exthdrs_exit();
1288 ip6_flowlabel_cleanup();
1289 ip6_route_cleanup();
1290 #ifdef CONFIG_PROC_FS
1292 /* Cleanup code parts. */
1294 ipv6_misc_proc_exit();
1295 udplite6_proc_exit();
1298 ipv6_netfilter_fini();
1305 unregister_pernet_subsys(&inet6_net_ops);
1306 #ifdef CONFIG_SYSCTL
1307 ipv6_static_sysctl_unregister();
1309 proto_unregister(&rawv6_prot);
1310 proto_unregister(&udplitev6_prot);
1311 proto_unregister(&udpv6_prot);
1312 proto_unregister(&tcpv6_prot);
1314 rcu_barrier(); /* Wait for completion of call_rcu()'s */
1316 module_exit(inet6_exit);
1318 MODULE_ALIAS_NETPROTO(PF_INET6);