2 * IPv6 Address [auto]configuration
3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
18 * Janos Farkas : delete timer on ifdown
19 * <chexum@bankinf.banki.hu>
20 * Andi Kleen : kill double kfree on module
22 * Maciej W. Rozycki : FDDI support
23 * sekiya@USAGI : Don't send too many RS
25 * yoshfuji@USAGI : Fixed interval between DAD
27 * YOSHIFUJI Hideaki @USAGI : improved accuracy of
28 * address validation timer.
29 * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
31 * Yuji SEKIYA @USAGI : Don't assign a same IPv6
32 * address on a same interface.
33 * YOSHIFUJI Hideaki @USAGI : ARCnet support
34 * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to
36 * YOSHIFUJI Hideaki @USAGI : improved source address
37 * selection; consider scope,
41 #define pr_fmt(fmt) "IPv6: " fmt
43 #include <linux/errno.h>
44 #include <linux/types.h>
45 #include <linux/kernel.h>
46 #include <linux/socket.h>
47 #include <linux/sockios.h>
48 #include <linux/net.h>
49 #include <linux/in6.h>
50 #include <linux/netdevice.h>
51 #include <linux/if_addr.h>
52 #include <linux/if_arp.h>
53 #include <linux/if_arcnet.h>
54 #include <linux/if_infiniband.h>
55 #include <linux/route.h>
56 #include <linux/inetdevice.h>
57 #include <linux/init.h>
58 #include <linux/slab.h>
60 #include <linux/sysctl.h>
62 #include <linux/capability.h>
63 #include <linux/delay.h>
64 #include <linux/notifier.h>
65 #include <linux/string.h>
66 #include <linux/hash.h>
68 #include <net/net_namespace.h>
72 #include <net/af_ieee802154.h>
73 #include <net/firewire.h>
75 #include <net/protocol.h>
76 #include <net/ndisc.h>
77 #include <net/ip6_route.h>
78 #include <net/addrconf.h>
81 #include <net/netlink.h>
82 #include <net/pkt_sched.h>
83 #include <linux/if_tunnel.h>
84 #include <linux/rtnetlink.h>
85 #include <linux/netconf.h>
86 #include <linux/random.h>
87 #include <linux/uaccess.h>
88 #include <asm/unaligned.h>
90 #include <linux/proc_fs.h>
91 #include <linux/seq_file.h>
92 #include <linux/export.h>
94 /* Set to 3 to get tracing... */
98 #define ADBG(fmt, ...) printk(fmt, ##__VA_ARGS__)
100 #define ADBG(fmt, ...) do { if (0) printk(fmt, ##__VA_ARGS__); } while (0)
103 #define INFINITY_LIFE_TIME 0xFFFFFFFF
105 static inline u32 cstamp_delta(unsigned long cstamp)
107 return (cstamp - INITIAL_JIFFIES) * 100UL / HZ;
111 static void addrconf_sysctl_register(struct inet6_dev *idev);
112 static void addrconf_sysctl_unregister(struct inet6_dev *idev);
114 static inline void addrconf_sysctl_register(struct inet6_dev *idev)
118 static inline void addrconf_sysctl_unregister(struct inet6_dev *idev)
123 static void __ipv6_regen_rndid(struct inet6_dev *idev);
124 static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr);
125 static void ipv6_regen_rndid(unsigned long data);
127 static int ipv6_generate_eui64(u8 *eui, struct net_device *dev);
128 static int ipv6_count_addresses(struct inet6_dev *idev);
131 * Configured unicast address hash table
133 static struct hlist_head inet6_addr_lst[IN6_ADDR_HSIZE];
134 static DEFINE_SPINLOCK(addrconf_hash_lock);
136 static void addrconf_verify(unsigned long);
138 static DEFINE_TIMER(addr_chk_timer, addrconf_verify, 0, 0);
139 static DEFINE_SPINLOCK(addrconf_verify_lock);
141 static void addrconf_join_anycast(struct inet6_ifaddr *ifp);
142 static void addrconf_leave_anycast(struct inet6_ifaddr *ifp);
144 static void addrconf_type_change(struct net_device *dev,
145 unsigned long event);
146 static int addrconf_ifdown(struct net_device *dev, int how);
148 static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx,
150 const struct net_device *dev,
151 u32 flags, u32 noflags);
153 static void addrconf_dad_start(struct inet6_ifaddr *ifp);
154 static void addrconf_dad_timer(unsigned long data);
155 static void addrconf_dad_completed(struct inet6_ifaddr *ifp);
156 static void addrconf_dad_run(struct inet6_dev *idev);
157 static void addrconf_rs_timer(unsigned long data);
158 static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
159 static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifa);
161 static void inet6_prefix_notify(int event, struct inet6_dev *idev,
162 struct prefix_info *pinfo);
163 static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
164 struct net_device *dev);
166 static struct ipv6_devconf ipv6_devconf __read_mostly = {
168 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
169 .mtu6 = IPV6_MIN_MTU,
171 .accept_redirects = 1,
173 .force_mld_version = 0,
174 .mldv1_unsolicited_report_interval = 10 * HZ,
175 .mldv2_unsolicited_report_interval = HZ,
177 .rtr_solicits = MAX_RTR_SOLICITATIONS,
178 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
179 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
181 .temp_valid_lft = TEMP_VALID_LIFETIME,
182 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
183 .regen_max_retry = REGEN_MAX_RETRY,
184 .max_desync_factor = MAX_DESYNC_FACTOR,
185 .max_addresses = IPV6_MAX_ADDRESSES,
186 .accept_ra_defrtr = 1,
187 .accept_ra_pinfo = 1,
188 #ifdef CONFIG_IPV6_ROUTER_PREF
189 .accept_ra_rtr_pref = 1,
190 .rtr_probe_interval = 60 * HZ,
191 #ifdef CONFIG_IPV6_ROUTE_INFO
192 .accept_ra_rt_info_max_plen = 0,
196 .accept_source_route = 0, /* we do not accept RH0 by default. */
199 .suppress_frag_ndisc = 1,
202 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly = {
204 .hop_limit = IPV6_DEFAULT_HOPLIMIT,
205 .mtu6 = IPV6_MIN_MTU,
207 .accept_redirects = 1,
209 .force_mld_version = 0,
210 .mldv1_unsolicited_report_interval = 10 * HZ,
211 .mldv2_unsolicited_report_interval = HZ,
213 .rtr_solicits = MAX_RTR_SOLICITATIONS,
214 .rtr_solicit_interval = RTR_SOLICITATION_INTERVAL,
215 .rtr_solicit_delay = MAX_RTR_SOLICITATION_DELAY,
217 .temp_valid_lft = TEMP_VALID_LIFETIME,
218 .temp_prefered_lft = TEMP_PREFERRED_LIFETIME,
219 .regen_max_retry = REGEN_MAX_RETRY,
220 .max_desync_factor = MAX_DESYNC_FACTOR,
221 .max_addresses = IPV6_MAX_ADDRESSES,
222 .accept_ra_defrtr = 1,
223 .accept_ra_pinfo = 1,
224 #ifdef CONFIG_IPV6_ROUTER_PREF
225 .accept_ra_rtr_pref = 1,
226 .rtr_probe_interval = 60 * HZ,
227 #ifdef CONFIG_IPV6_ROUTE_INFO
228 .accept_ra_rt_info_max_plen = 0,
232 .accept_source_route = 0, /* we do not accept RH0 by default. */
235 .suppress_frag_ndisc = 1,
238 /* Check if a valid qdisc is available */
239 static inline bool addrconf_qdisc_ok(const struct net_device *dev)
241 return !qdisc_tx_is_noop(dev);
244 static void addrconf_del_rs_timer(struct inet6_dev *idev)
246 if (del_timer(&idev->rs_timer))
250 static void addrconf_del_dad_timer(struct inet6_ifaddr *ifp)
252 if (del_timer(&ifp->dad_timer))
256 static void addrconf_mod_rs_timer(struct inet6_dev *idev,
259 if (!timer_pending(&idev->rs_timer))
261 mod_timer(&idev->rs_timer, jiffies + when);
264 static void addrconf_mod_dad_timer(struct inet6_ifaddr *ifp,
267 if (!timer_pending(&ifp->dad_timer))
269 mod_timer(&ifp->dad_timer, jiffies + when);
272 static int snmp6_alloc_dev(struct inet6_dev *idev)
274 if (snmp_mib_init((void __percpu **)idev->stats.ipv6,
275 sizeof(struct ipstats_mib),
276 __alignof__(struct ipstats_mib)) < 0)
278 idev->stats.icmpv6dev = kzalloc(sizeof(struct icmpv6_mib_device),
280 if (!idev->stats.icmpv6dev)
282 idev->stats.icmpv6msgdev = kzalloc(sizeof(struct icmpv6msg_mib_device),
284 if (!idev->stats.icmpv6msgdev)
290 kfree(idev->stats.icmpv6dev);
292 snmp_mib_free((void __percpu **)idev->stats.ipv6);
297 static struct inet6_dev *ipv6_add_dev(struct net_device *dev)
299 struct inet6_dev *ndev;
303 if (dev->mtu < IPV6_MIN_MTU)
306 ndev = kzalloc(sizeof(struct inet6_dev), GFP_KERNEL);
311 rwlock_init(&ndev->lock);
313 INIT_LIST_HEAD(&ndev->addr_list);
314 setup_timer(&ndev->rs_timer, addrconf_rs_timer,
315 (unsigned long)ndev);
316 memcpy(&ndev->cnf, dev_net(dev)->ipv6.devconf_dflt, sizeof(ndev->cnf));
317 ndev->cnf.mtu6 = dev->mtu;
318 ndev->cnf.sysctl = NULL;
319 ndev->nd_parms = neigh_parms_alloc(dev, &nd_tbl);
320 if (ndev->nd_parms == NULL) {
324 if (ndev->cnf.forwarding)
325 dev_disable_lro(dev);
326 /* We refer to the device */
329 if (snmp6_alloc_dev(ndev) < 0) {
331 "%s: cannot allocate memory for statistics; dev=%s.\n",
332 __func__, dev->name);
333 neigh_parms_release(&nd_tbl, ndev->nd_parms);
339 if (snmp6_register_dev(ndev) < 0) {
341 "%s: cannot create /proc/net/dev_snmp6/%s\n",
342 __func__, dev->name);
343 neigh_parms_release(&nd_tbl, ndev->nd_parms);
345 in6_dev_finish_destroy(ndev);
349 /* One reference from device. We must do this before
350 * we invoke __ipv6_regen_rndid().
354 if (dev->flags & (IFF_NOARP | IFF_LOOPBACK))
355 ndev->cnf.accept_dad = -1;
357 #if IS_ENABLED(CONFIG_IPV6_SIT)
358 if (dev->type == ARPHRD_SIT && (dev->priv_flags & IFF_ISATAP)) {
359 pr_info("%s: Disabled Multicast RS\n", dev->name);
360 ndev->cnf.rtr_solicits = 0;
364 INIT_LIST_HEAD(&ndev->tempaddr_list);
365 setup_timer(&ndev->regen_timer, ipv6_regen_rndid, (unsigned long)ndev);
366 if ((dev->flags&IFF_LOOPBACK) ||
367 dev->type == ARPHRD_TUNNEL ||
368 dev->type == ARPHRD_TUNNEL6 ||
369 dev->type == ARPHRD_SIT ||
370 dev->type == ARPHRD_NONE) {
371 ndev->cnf.use_tempaddr = -1;
374 ipv6_regen_rndid((unsigned long) ndev);
377 ndev->token = in6addr_any;
379 if (netif_running(dev) && addrconf_qdisc_ok(dev))
380 ndev->if_flags |= IF_READY;
382 ipv6_mc_init_dev(ndev);
383 ndev->tstamp = jiffies;
384 addrconf_sysctl_register(ndev);
385 /* protected by rtnl_lock */
386 rcu_assign_pointer(dev->ip6_ptr, ndev);
388 /* Join interface-local all-node multicast group */
389 ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allnodes);
391 /* Join all-node multicast group */
392 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allnodes);
394 /* Join all-router multicast group if forwarding is set */
395 if (ndev->cnf.forwarding && (dev->flags & IFF_MULTICAST))
396 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
401 static struct inet6_dev *ipv6_find_idev(struct net_device *dev)
403 struct inet6_dev *idev;
407 idev = __in6_dev_get(dev);
409 idev = ipv6_add_dev(dev);
414 if (dev->flags&IFF_UP)
419 static int inet6_netconf_msgsize_devconf(int type)
421 int size = NLMSG_ALIGN(sizeof(struct netconfmsg))
422 + nla_total_size(4); /* NETCONFA_IFINDEX */
424 /* type -1 is used for ALL */
425 if (type == -1 || type == NETCONFA_FORWARDING)
426 size += nla_total_size(4);
427 #ifdef CONFIG_IPV6_MROUTE
428 if (type == -1 || type == NETCONFA_MC_FORWARDING)
429 size += nla_total_size(4);
435 static int inet6_netconf_fill_devconf(struct sk_buff *skb, int ifindex,
436 struct ipv6_devconf *devconf, u32 portid,
437 u32 seq, int event, unsigned int flags,
440 struct nlmsghdr *nlh;
441 struct netconfmsg *ncm;
443 nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct netconfmsg),
448 ncm = nlmsg_data(nlh);
449 ncm->ncm_family = AF_INET6;
451 if (nla_put_s32(skb, NETCONFA_IFINDEX, ifindex) < 0)
452 goto nla_put_failure;
454 /* type -1 is used for ALL */
455 if ((type == -1 || type == NETCONFA_FORWARDING) &&
456 nla_put_s32(skb, NETCONFA_FORWARDING, devconf->forwarding) < 0)
457 goto nla_put_failure;
458 #ifdef CONFIG_IPV6_MROUTE
459 if ((type == -1 || type == NETCONFA_MC_FORWARDING) &&
460 nla_put_s32(skb, NETCONFA_MC_FORWARDING,
461 devconf->mc_forwarding) < 0)
462 goto nla_put_failure;
464 return nlmsg_end(skb, nlh);
467 nlmsg_cancel(skb, nlh);
471 void inet6_netconf_notify_devconf(struct net *net, int type, int ifindex,
472 struct ipv6_devconf *devconf)
477 skb = nlmsg_new(inet6_netconf_msgsize_devconf(type), GFP_ATOMIC);
481 err = inet6_netconf_fill_devconf(skb, ifindex, devconf, 0, 0,
482 RTM_NEWNETCONF, 0, type);
484 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
485 WARN_ON(err == -EMSGSIZE);
489 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_NETCONF, NULL, GFP_ATOMIC);
492 rtnl_set_sk_err(net, RTNLGRP_IPV6_NETCONF, err);
495 static const struct nla_policy devconf_ipv6_policy[NETCONFA_MAX+1] = {
496 [NETCONFA_IFINDEX] = { .len = sizeof(int) },
497 [NETCONFA_FORWARDING] = { .len = sizeof(int) },
500 static int inet6_netconf_get_devconf(struct sk_buff *in_skb,
501 struct nlmsghdr *nlh)
503 struct net *net = sock_net(in_skb->sk);
504 struct nlattr *tb[NETCONFA_MAX+1];
505 struct netconfmsg *ncm;
507 struct ipv6_devconf *devconf;
508 struct inet6_dev *in6_dev;
509 struct net_device *dev;
513 err = nlmsg_parse(nlh, sizeof(*ncm), tb, NETCONFA_MAX,
514 devconf_ipv6_policy);
519 if (!tb[NETCONFA_IFINDEX])
522 ifindex = nla_get_s32(tb[NETCONFA_IFINDEX]);
524 case NETCONFA_IFINDEX_ALL:
525 devconf = net->ipv6.devconf_all;
527 case NETCONFA_IFINDEX_DEFAULT:
528 devconf = net->ipv6.devconf_dflt;
531 dev = __dev_get_by_index(net, ifindex);
534 in6_dev = __in6_dev_get(dev);
537 devconf = &in6_dev->cnf;
542 skb = nlmsg_new(inet6_netconf_msgsize_devconf(-1), GFP_ATOMIC);
546 err = inet6_netconf_fill_devconf(skb, ifindex, devconf,
547 NETLINK_CB(in_skb).portid,
548 nlh->nlmsg_seq, RTM_NEWNETCONF, 0,
551 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
552 WARN_ON(err == -EMSGSIZE);
556 err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
561 static int inet6_netconf_dump_devconf(struct sk_buff *skb,
562 struct netlink_callback *cb)
564 struct net *net = sock_net(skb->sk);
567 struct net_device *dev;
568 struct inet6_dev *idev;
569 struct hlist_head *head;
572 s_idx = idx = cb->args[1];
574 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
576 head = &net->dev_index_head[h];
578 cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^
580 hlist_for_each_entry_rcu(dev, head, index_hlist) {
583 idev = __in6_dev_get(dev);
587 if (inet6_netconf_fill_devconf(skb, dev->ifindex,
589 NETLINK_CB(cb->skb).portid,
597 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
603 if (h == NETDEV_HASHENTRIES) {
604 if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_ALL,
605 net->ipv6.devconf_all,
606 NETLINK_CB(cb->skb).portid,
608 RTM_NEWNETCONF, NLM_F_MULTI,
614 if (h == NETDEV_HASHENTRIES + 1) {
615 if (inet6_netconf_fill_devconf(skb, NETCONFA_IFINDEX_DEFAULT,
616 net->ipv6.devconf_dflt,
617 NETLINK_CB(cb->skb).portid,
619 RTM_NEWNETCONF, NLM_F_MULTI,
633 static void dev_forward_change(struct inet6_dev *idev)
635 struct net_device *dev;
636 struct inet6_ifaddr *ifa;
641 if (idev->cnf.forwarding)
642 dev_disable_lro(dev);
643 if (dev->flags & IFF_MULTICAST) {
644 if (idev->cnf.forwarding) {
645 ipv6_dev_mc_inc(dev, &in6addr_linklocal_allrouters);
646 ipv6_dev_mc_inc(dev, &in6addr_interfacelocal_allrouters);
647 ipv6_dev_mc_inc(dev, &in6addr_sitelocal_allrouters);
649 ipv6_dev_mc_dec(dev, &in6addr_linklocal_allrouters);
650 ipv6_dev_mc_dec(dev, &in6addr_interfacelocal_allrouters);
651 ipv6_dev_mc_dec(dev, &in6addr_sitelocal_allrouters);
655 list_for_each_entry(ifa, &idev->addr_list, if_list) {
656 if (ifa->flags&IFA_F_TENTATIVE)
658 if (idev->cnf.forwarding)
659 addrconf_join_anycast(ifa);
661 addrconf_leave_anycast(ifa);
663 inet6_netconf_notify_devconf(dev_net(dev), NETCONFA_FORWARDING,
664 dev->ifindex, &idev->cnf);
668 static void addrconf_forward_change(struct net *net, __s32 newf)
670 struct net_device *dev;
671 struct inet6_dev *idev;
673 for_each_netdev(net, dev) {
674 idev = __in6_dev_get(dev);
676 int changed = (!idev->cnf.forwarding) ^ (!newf);
677 idev->cnf.forwarding = newf;
679 dev_forward_change(idev);
684 static int addrconf_fixup_forwarding(struct ctl_table *table, int *p, int newf)
690 return restart_syscall();
692 net = (struct net *)table->extra2;
696 if (p == &net->ipv6.devconf_dflt->forwarding) {
697 if ((!newf) ^ (!old))
698 inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING,
699 NETCONFA_IFINDEX_DEFAULT,
700 net->ipv6.devconf_dflt);
705 if (p == &net->ipv6.devconf_all->forwarding) {
706 net->ipv6.devconf_dflt->forwarding = newf;
707 addrconf_forward_change(net, newf);
708 if ((!newf) ^ (!old))
709 inet6_netconf_notify_devconf(net, NETCONFA_FORWARDING,
710 NETCONFA_IFINDEX_ALL,
711 net->ipv6.devconf_all);
712 } else if ((!newf) ^ (!old))
713 dev_forward_change((struct inet6_dev *)table->extra1);
717 rt6_purge_dflt_routers(net);
722 /* Nobody refers to this ifaddr, destroy it */
723 void inet6_ifa_finish_destroy(struct inet6_ifaddr *ifp)
725 WARN_ON(!hlist_unhashed(&ifp->addr_lst));
727 #ifdef NET_REFCNT_DEBUG
728 pr_debug("%s\n", __func__);
731 in6_dev_put(ifp->idev);
733 if (del_timer(&ifp->dad_timer))
734 pr_notice("Timer is still running, when freeing ifa=%p\n", ifp);
736 if (ifp->state != INET6_IFADDR_STATE_DEAD) {
737 pr_warn("Freeing alive inet6 address %p\n", ifp);
746 ipv6_link_dev_addr(struct inet6_dev *idev, struct inet6_ifaddr *ifp)
749 int ifp_scope = ipv6_addr_src_scope(&ifp->addr);
752 * Each device address list is sorted in order of scope -
753 * global before linklocal.
755 list_for_each(p, &idev->addr_list) {
756 struct inet6_ifaddr *ifa
757 = list_entry(p, struct inet6_ifaddr, if_list);
758 if (ifp_scope >= ipv6_addr_src_scope(&ifa->addr))
762 list_add_tail(&ifp->if_list, p);
765 static u32 inet6_addr_hash(const struct in6_addr *addr)
767 return hash_32(ipv6_addr_hash(addr), IN6_ADDR_HSIZE_SHIFT);
770 /* On success it returns ifp with increased reference count */
772 static struct inet6_ifaddr *
773 ipv6_add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
774 const struct in6_addr *peer_addr, int pfxlen,
775 int scope, u32 flags, u32 valid_lft, u32 prefered_lft)
777 struct inet6_ifaddr *ifa = NULL;
781 int addr_type = ipv6_addr_type(addr);
783 if (addr_type == IPV6_ADDR_ANY ||
784 addr_type & IPV6_ADDR_MULTICAST ||
785 (!(idev->dev->flags & IFF_LOOPBACK) &&
786 addr_type & IPV6_ADDR_LOOPBACK))
787 return ERR_PTR(-EADDRNOTAVAIL);
791 err = -ENODEV; /*XXX*/
795 if (idev->cnf.disable_ipv6) {
800 spin_lock(&addrconf_hash_lock);
802 /* Ignore adding duplicate addresses on an interface */
803 if (ipv6_chk_same_addr(dev_net(idev->dev), addr, idev->dev)) {
804 ADBG("ipv6_add_addr: already assigned\n");
809 ifa = kzalloc(sizeof(struct inet6_ifaddr), GFP_ATOMIC);
812 ADBG("ipv6_add_addr: malloc failed\n");
817 rt = addrconf_dst_alloc(idev, addr, false);
825 ifa->peer_addr = *peer_addr;
827 spin_lock_init(&ifa->lock);
828 spin_lock_init(&ifa->state_lock);
829 setup_timer(&ifa->dad_timer, addrconf_dad_timer,
831 INIT_HLIST_NODE(&ifa->addr_lst);
833 ifa->prefix_len = pfxlen;
834 ifa->flags = flags | IFA_F_TENTATIVE;
835 ifa->valid_lft = valid_lft;
836 ifa->prefered_lft = prefered_lft;
837 ifa->cstamp = ifa->tstamp = jiffies;
838 ifa->tokenized = false;
847 /* Add to big hash table */
848 hash = inet6_addr_hash(addr);
850 hlist_add_head_rcu(&ifa->addr_lst, &inet6_addr_lst[hash]);
851 spin_unlock(&addrconf_hash_lock);
853 write_lock(&idev->lock);
854 /* Add to inet6_dev unicast addr list. */
855 ipv6_link_dev_addr(idev, ifa);
857 if (ifa->flags&IFA_F_TEMPORARY) {
858 list_add(&ifa->tmp_list, &idev->tempaddr_list);
863 write_unlock(&idev->lock);
865 rcu_read_unlock_bh();
867 if (likely(err == 0))
868 inet6addr_notifier_call_chain(NETDEV_UP, ifa);
876 spin_unlock(&addrconf_hash_lock);
880 /* This function wants to get referenced ifp and releases it before return */
882 static void ipv6_del_addr(struct inet6_ifaddr *ifp)
884 struct inet6_ifaddr *ifa, *ifn;
885 struct inet6_dev *idev = ifp->idev;
887 int deleted = 0, onlink = 0;
888 unsigned long expires = jiffies;
890 spin_lock_bh(&ifp->state_lock);
892 ifp->state = INET6_IFADDR_STATE_DEAD;
893 spin_unlock_bh(&ifp->state_lock);
895 if (state == INET6_IFADDR_STATE_DEAD)
898 spin_lock_bh(&addrconf_hash_lock);
899 hlist_del_init_rcu(&ifp->addr_lst);
900 spin_unlock_bh(&addrconf_hash_lock);
902 write_lock_bh(&idev->lock);
904 if (ifp->flags&IFA_F_TEMPORARY) {
905 list_del(&ifp->tmp_list);
907 in6_ifa_put(ifp->ifpub);
913 list_for_each_entry_safe(ifa, ifn, &idev->addr_list, if_list) {
915 list_del_init(&ifp->if_list);
918 if (!(ifp->flags & IFA_F_PERMANENT) || onlink > 0)
922 } else if (ifp->flags & IFA_F_PERMANENT) {
923 if (ipv6_prefix_equal(&ifa->addr, &ifp->addr,
925 if (ifa->flags & IFA_F_PERMANENT) {
930 unsigned long lifetime;
935 spin_lock(&ifa->lock);
937 lifetime = addrconf_timeout_fixup(ifa->valid_lft, HZ);
939 * Note: Because this address is
940 * not permanent, lifetime <
941 * LONG_MAX / HZ here.
943 if (time_before(expires,
944 ifa->tstamp + lifetime * HZ))
945 expires = ifa->tstamp + lifetime * HZ;
946 spin_unlock(&ifa->lock);
951 write_unlock_bh(&idev->lock);
953 addrconf_del_dad_timer(ifp);
955 ipv6_ifa_notify(RTM_DELADDR, ifp);
957 inet6addr_notifier_call_chain(NETDEV_DOWN, ifp);
960 * Purge or update corresponding prefix
962 * 1) we don't purge prefix here if address was not permanent.
963 * prefix is managed by its own lifetime.
964 * 2) if there're no addresses, delete prefix.
965 * 3) if there're still other permanent address(es),
966 * corresponding prefix is still permanent.
967 * 4) otherwise, update prefix lifetime to the
968 * longest valid lifetime among the corresponding
969 * addresses on the device.
970 * Note: subsequent RA will update lifetime.
974 if ((ifp->flags & IFA_F_PERMANENT) && onlink < 1) {
975 struct in6_addr prefix;
978 ipv6_addr_prefix(&prefix, &ifp->addr, ifp->prefix_len);
980 rt = addrconf_get_prefix_route(&prefix,
983 0, RTF_GATEWAY | RTF_DEFAULT);
989 } else if (!(rt->rt6i_flags & RTF_EXPIRES)) {
990 rt6_set_expires(rt, expires);
996 /* clean up prefsrc entries */
997 rt6_remove_prefsrc(ifp);
1002 static int ipv6_create_tempaddr(struct inet6_ifaddr *ifp, struct inet6_ifaddr *ift)
1004 struct inet6_dev *idev = ifp->idev;
1005 struct in6_addr addr, *tmpaddr;
1006 unsigned long tmp_prefered_lft, tmp_valid_lft, tmp_tstamp, age;
1007 unsigned long regen_advance;
1011 unsigned long now = jiffies;
1013 write_lock(&idev->lock);
1015 spin_lock_bh(&ift->lock);
1016 memcpy(&addr.s6_addr[8], &ift->addr.s6_addr[8], 8);
1017 spin_unlock_bh(&ift->lock);
1024 if (idev->cnf.use_tempaddr <= 0) {
1025 write_unlock(&idev->lock);
1026 pr_info("%s: use_tempaddr is disabled\n", __func__);
1031 spin_lock_bh(&ifp->lock);
1032 if (ifp->regen_count++ >= idev->cnf.regen_max_retry) {
1033 idev->cnf.use_tempaddr = -1; /*XXX*/
1034 spin_unlock_bh(&ifp->lock);
1035 write_unlock(&idev->lock);
1036 pr_warn("%s: regeneration time exceeded - disabled temporary address support\n",
1043 memcpy(addr.s6_addr, ifp->addr.s6_addr, 8);
1044 __ipv6_try_regen_rndid(idev, tmpaddr);
1045 memcpy(&addr.s6_addr[8], idev->rndid, 8);
1046 age = (now - ifp->tstamp) / HZ;
1047 tmp_valid_lft = min_t(__u32,
1049 idev->cnf.temp_valid_lft + age);
1050 tmp_prefered_lft = min_t(__u32,
1052 idev->cnf.temp_prefered_lft + age -
1053 idev->cnf.max_desync_factor);
1054 tmp_plen = ifp->prefix_len;
1055 tmp_tstamp = ifp->tstamp;
1056 spin_unlock_bh(&ifp->lock);
1058 regen_advance = idev->cnf.regen_max_retry *
1059 idev->cnf.dad_transmits *
1060 idev->nd_parms->retrans_time / HZ;
1061 write_unlock(&idev->lock);
1063 /* A temporary address is created only if this calculated Preferred
1064 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
1065 * an implementation must not create a temporary address with a zero
1066 * Preferred Lifetime.
1068 if (tmp_prefered_lft <= regen_advance) {
1075 addr_flags = IFA_F_TEMPORARY;
1076 /* set in addrconf_prefix_rcv() */
1077 if (ifp->flags & IFA_F_OPTIMISTIC)
1078 addr_flags |= IFA_F_OPTIMISTIC;
1080 ift = ipv6_add_addr(idev, &addr, NULL, tmp_plen,
1081 ipv6_addr_scope(&addr), addr_flags,
1082 tmp_valid_lft, tmp_prefered_lft);
1086 pr_info("%s: retry temporary address regeneration\n", __func__);
1088 write_lock(&idev->lock);
1092 spin_lock_bh(&ift->lock);
1095 ift->tstamp = tmp_tstamp;
1096 spin_unlock_bh(&ift->lock);
1098 addrconf_dad_start(ift);
1106 * Choose an appropriate source address (RFC3484)
1109 IPV6_SADDR_RULE_INIT = 0,
1110 IPV6_SADDR_RULE_LOCAL,
1111 IPV6_SADDR_RULE_SCOPE,
1112 IPV6_SADDR_RULE_PREFERRED,
1113 #ifdef CONFIG_IPV6_MIP6
1114 IPV6_SADDR_RULE_HOA,
1116 IPV6_SADDR_RULE_OIF,
1117 IPV6_SADDR_RULE_LABEL,
1118 IPV6_SADDR_RULE_PRIVACY,
1119 IPV6_SADDR_RULE_ORCHID,
1120 IPV6_SADDR_RULE_PREFIX,
1124 struct ipv6_saddr_score {
1127 struct inet6_ifaddr *ifa;
1128 DECLARE_BITMAP(scorebits, IPV6_SADDR_RULE_MAX);
1133 struct ipv6_saddr_dst {
1134 const struct in6_addr *addr;
1141 static inline int ipv6_saddr_preferred(int type)
1143 if (type & (IPV6_ADDR_MAPPED|IPV6_ADDR_COMPATv4|IPV6_ADDR_LOOPBACK))
1148 static int ipv6_get_saddr_eval(struct net *net,
1149 struct ipv6_saddr_score *score,
1150 struct ipv6_saddr_dst *dst,
1155 if (i <= score->rule) {
1157 case IPV6_SADDR_RULE_SCOPE:
1158 ret = score->scopedist;
1160 case IPV6_SADDR_RULE_PREFIX:
1161 ret = score->matchlen;
1164 ret = !!test_bit(i, score->scorebits);
1170 case IPV6_SADDR_RULE_INIT:
1171 /* Rule 0: remember if hiscore is not ready yet */
1174 case IPV6_SADDR_RULE_LOCAL:
1175 /* Rule 1: Prefer same address */
1176 ret = ipv6_addr_equal(&score->ifa->addr, dst->addr);
1178 case IPV6_SADDR_RULE_SCOPE:
1179 /* Rule 2: Prefer appropriate scope
1184 * ---+--+-+---> scope
1186 * | d is scope of the destination.
1188 * | \ <- smaller scope is better if
1189 * B-15 | \ if scope is enough for destinaion.
1190 * | ret = B - scope (-1 <= scope >= d <= 15).
1192 * |/ <- greater is better
1193 * -C / if scope is not enough for destination.
1194 * /| ret = scope - C (-1 <= d < scope <= 15).
1196 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1197 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1198 * Assume B = 0 and we get C > 29.
1200 ret = __ipv6_addr_src_scope(score->addr_type);
1201 if (ret >= dst->scope)
1204 ret -= 128; /* 30 is enough */
1205 score->scopedist = ret;
1207 case IPV6_SADDR_RULE_PREFERRED:
1208 /* Rule 3: Avoid deprecated and optimistic addresses */
1209 ret = ipv6_saddr_preferred(score->addr_type) ||
1210 !(score->ifa->flags & (IFA_F_DEPRECATED|IFA_F_OPTIMISTIC));
1212 #ifdef CONFIG_IPV6_MIP6
1213 case IPV6_SADDR_RULE_HOA:
1215 /* Rule 4: Prefer home address */
1216 int prefhome = !(dst->prefs & IPV6_PREFER_SRC_COA);
1217 ret = !(score->ifa->flags & IFA_F_HOMEADDRESS) ^ prefhome;
1221 case IPV6_SADDR_RULE_OIF:
1222 /* Rule 5: Prefer outgoing interface */
1223 ret = (!dst->ifindex ||
1224 dst->ifindex == score->ifa->idev->dev->ifindex);
1226 case IPV6_SADDR_RULE_LABEL:
1227 /* Rule 6: Prefer matching label */
1228 ret = ipv6_addr_label(net,
1229 &score->ifa->addr, score->addr_type,
1230 score->ifa->idev->dev->ifindex) == dst->label;
1232 case IPV6_SADDR_RULE_PRIVACY:
1234 /* Rule 7: Prefer public address
1235 * Note: prefer temporary address if use_tempaddr >= 2
1237 int preftmp = dst->prefs & (IPV6_PREFER_SRC_PUBLIC|IPV6_PREFER_SRC_TMP) ?
1238 !!(dst->prefs & IPV6_PREFER_SRC_TMP) :
1239 score->ifa->idev->cnf.use_tempaddr >= 2;
1240 ret = (!(score->ifa->flags & IFA_F_TEMPORARY)) ^ preftmp;
1243 case IPV6_SADDR_RULE_ORCHID:
1244 /* Rule 8-: Prefer ORCHID vs ORCHID or
1245 * non-ORCHID vs non-ORCHID
1247 ret = !(ipv6_addr_orchid(&score->ifa->addr) ^
1248 ipv6_addr_orchid(dst->addr));
1250 case IPV6_SADDR_RULE_PREFIX:
1251 /* Rule 8: Use longest matching prefix */
1252 ret = ipv6_addr_diff(&score->ifa->addr, dst->addr);
1253 if (ret > score->ifa->prefix_len)
1254 ret = score->ifa->prefix_len;
1255 score->matchlen = ret;
1262 __set_bit(i, score->scorebits);
1268 int ipv6_dev_get_saddr(struct net *net, const struct net_device *dst_dev,
1269 const struct in6_addr *daddr, unsigned int prefs,
1270 struct in6_addr *saddr)
1272 struct ipv6_saddr_score scores[2],
1273 *score = &scores[0], *hiscore = &scores[1];
1274 struct ipv6_saddr_dst dst;
1275 struct net_device *dev;
1278 dst_type = __ipv6_addr_type(daddr);
1280 dst.ifindex = dst_dev ? dst_dev->ifindex : 0;
1281 dst.scope = __ipv6_addr_src_scope(dst_type);
1282 dst.label = ipv6_addr_label(net, daddr, dst_type, dst.ifindex);
1286 hiscore->ifa = NULL;
1290 for_each_netdev_rcu(net, dev) {
1291 struct inet6_dev *idev;
1293 /* Candidate Source Address (section 4)
1294 * - multicast and link-local destination address,
1295 * the set of candidate source address MUST only
1296 * include addresses assigned to interfaces
1297 * belonging to the same link as the outgoing
1299 * (- For site-local destination addresses, the
1300 * set of candidate source addresses MUST only
1301 * include addresses assigned to interfaces
1302 * belonging to the same site as the outgoing
1305 if (((dst_type & IPV6_ADDR_MULTICAST) ||
1306 dst.scope <= IPV6_ADDR_SCOPE_LINKLOCAL) &&
1307 dst.ifindex && dev->ifindex != dst.ifindex)
1310 idev = __in6_dev_get(dev);
1314 read_lock_bh(&idev->lock);
1315 list_for_each_entry(score->ifa, &idev->addr_list, if_list) {
1319 * - Tentative Address (RFC2462 section 5.4)
1320 * - A tentative address is not considered
1321 * "assigned to an interface" in the traditional
1322 * sense, unless it is also flagged as optimistic.
1323 * - Candidate Source Address (section 4)
1324 * - In any case, anycast addresses, multicast
1325 * addresses, and the unspecified address MUST
1326 * NOT be included in a candidate set.
1328 if ((score->ifa->flags & IFA_F_TENTATIVE) &&
1329 (!(score->ifa->flags & IFA_F_OPTIMISTIC)))
1332 score->addr_type = __ipv6_addr_type(&score->ifa->addr);
1334 if (unlikely(score->addr_type == IPV6_ADDR_ANY ||
1335 score->addr_type & IPV6_ADDR_MULTICAST)) {
1336 LIMIT_NETDEBUG(KERN_DEBUG
1337 "ADDRCONF: unspecified / multicast address "
1338 "assigned as unicast address on %s",
1344 bitmap_zero(score->scorebits, IPV6_SADDR_RULE_MAX);
1346 for (i = 0; i < IPV6_SADDR_RULE_MAX; i++) {
1347 int minihiscore, miniscore;
1349 minihiscore = ipv6_get_saddr_eval(net, hiscore, &dst, i);
1350 miniscore = ipv6_get_saddr_eval(net, score, &dst, i);
1352 if (minihiscore > miniscore) {
1353 if (i == IPV6_SADDR_RULE_SCOPE &&
1354 score->scopedist > 0) {
1357 * each remaining entry
1358 * has too small (not enough)
1359 * scope, because ifa entries
1360 * are sorted by their scope
1366 } else if (minihiscore < miniscore) {
1368 in6_ifa_put(hiscore->ifa);
1370 in6_ifa_hold(score->ifa);
1372 swap(hiscore, score);
1374 /* restore our iterator */
1375 score->ifa = hiscore->ifa;
1382 read_unlock_bh(&idev->lock);
1387 return -EADDRNOTAVAIL;
1389 *saddr = hiscore->ifa->addr;
1390 in6_ifa_put(hiscore->ifa);
1393 EXPORT_SYMBOL(ipv6_dev_get_saddr);
1395 int __ipv6_get_lladdr(struct inet6_dev *idev, struct in6_addr *addr,
1396 unsigned char banned_flags)
1398 struct inet6_ifaddr *ifp;
1399 int err = -EADDRNOTAVAIL;
1401 list_for_each_entry(ifp, &idev->addr_list, if_list) {
1402 if (ifp->scope == IFA_LINK &&
1403 !(ifp->flags & banned_flags)) {
1412 int ipv6_get_lladdr(struct net_device *dev, struct in6_addr *addr,
1413 unsigned char banned_flags)
1415 struct inet6_dev *idev;
1416 int err = -EADDRNOTAVAIL;
1419 idev = __in6_dev_get(dev);
1421 read_lock_bh(&idev->lock);
1422 err = __ipv6_get_lladdr(idev, addr, banned_flags);
1423 read_unlock_bh(&idev->lock);
1429 static int ipv6_count_addresses(struct inet6_dev *idev)
1432 struct inet6_ifaddr *ifp;
1434 read_lock_bh(&idev->lock);
1435 list_for_each_entry(ifp, &idev->addr_list, if_list)
1437 read_unlock_bh(&idev->lock);
1441 int ipv6_chk_addr(struct net *net, const struct in6_addr *addr,
1442 const struct net_device *dev, int strict)
1444 struct inet6_ifaddr *ifp;
1445 unsigned int hash = inet6_addr_hash(addr);
1448 hlist_for_each_entry_rcu(ifp, &inet6_addr_lst[hash], addr_lst) {
1449 if (!net_eq(dev_net(ifp->idev->dev), net))
1451 if (ipv6_addr_equal(&ifp->addr, addr) &&
1452 !(ifp->flags&IFA_F_TENTATIVE) &&
1453 (dev == NULL || ifp->idev->dev == dev ||
1454 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict))) {
1455 rcu_read_unlock_bh();
1460 rcu_read_unlock_bh();
1463 EXPORT_SYMBOL(ipv6_chk_addr);
1465 static bool ipv6_chk_same_addr(struct net *net, const struct in6_addr *addr,
1466 struct net_device *dev)
1468 unsigned int hash = inet6_addr_hash(addr);
1469 struct inet6_ifaddr *ifp;
1471 hlist_for_each_entry(ifp, &inet6_addr_lst[hash], addr_lst) {
1472 if (!net_eq(dev_net(ifp->idev->dev), net))
1474 if (ipv6_addr_equal(&ifp->addr, addr)) {
1475 if (dev == NULL || ifp->idev->dev == dev)
1482 /* Compares an address/prefix_len with addresses on device @dev.
1483 * If one is found it returns true.
1485 bool ipv6_chk_custom_prefix(const struct in6_addr *addr,
1486 const unsigned int prefix_len, struct net_device *dev)
1488 struct inet6_dev *idev;
1489 struct inet6_ifaddr *ifa;
1493 idev = __in6_dev_get(dev);
1495 read_lock_bh(&idev->lock);
1496 list_for_each_entry(ifa, &idev->addr_list, if_list) {
1497 ret = ipv6_prefix_equal(addr, &ifa->addr, prefix_len);
1501 read_unlock_bh(&idev->lock);
1507 EXPORT_SYMBOL(ipv6_chk_custom_prefix);
1509 int ipv6_chk_prefix(const struct in6_addr *addr, struct net_device *dev)
1511 struct inet6_dev *idev;
1512 struct inet6_ifaddr *ifa;
1517 idev = __in6_dev_get(dev);
1519 read_lock_bh(&idev->lock);
1520 list_for_each_entry(ifa, &idev->addr_list, if_list) {
1521 onlink = ipv6_prefix_equal(addr, &ifa->addr,
1526 read_unlock_bh(&idev->lock);
1531 EXPORT_SYMBOL(ipv6_chk_prefix);
1533 struct inet6_ifaddr *ipv6_get_ifaddr(struct net *net, const struct in6_addr *addr,
1534 struct net_device *dev, int strict)
1536 struct inet6_ifaddr *ifp, *result = NULL;
1537 unsigned int hash = inet6_addr_hash(addr);
1540 hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) {
1541 if (!net_eq(dev_net(ifp->idev->dev), net))
1543 if (ipv6_addr_equal(&ifp->addr, addr)) {
1544 if (dev == NULL || ifp->idev->dev == dev ||
1545 !(ifp->scope&(IFA_LINK|IFA_HOST) || strict)) {
1552 rcu_read_unlock_bh();
1557 /* Gets referenced address, destroys ifaddr */
1559 static void addrconf_dad_stop(struct inet6_ifaddr *ifp, int dad_failed)
1561 if (ifp->flags&IFA_F_PERMANENT) {
1562 spin_lock_bh(&ifp->lock);
1563 addrconf_del_dad_timer(ifp);
1564 ifp->flags |= IFA_F_TENTATIVE;
1566 ifp->flags |= IFA_F_DADFAILED;
1567 spin_unlock_bh(&ifp->lock);
1569 ipv6_ifa_notify(0, ifp);
1571 } else if (ifp->flags&IFA_F_TEMPORARY) {
1572 struct inet6_ifaddr *ifpub;
1573 spin_lock_bh(&ifp->lock);
1576 in6_ifa_hold(ifpub);
1577 spin_unlock_bh(&ifp->lock);
1578 ipv6_create_tempaddr(ifpub, ifp);
1581 spin_unlock_bh(&ifp->lock);
1588 static int addrconf_dad_end(struct inet6_ifaddr *ifp)
1592 spin_lock(&ifp->state_lock);
1593 if (ifp->state == INET6_IFADDR_STATE_DAD) {
1594 ifp->state = INET6_IFADDR_STATE_POSTDAD;
1597 spin_unlock(&ifp->state_lock);
1602 void addrconf_dad_failure(struct inet6_ifaddr *ifp)
1604 struct inet6_dev *idev = ifp->idev;
1606 if (addrconf_dad_end(ifp)) {
1611 net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n",
1612 ifp->idev->dev->name, &ifp->addr);
1614 if (idev->cnf.accept_dad > 1 && !idev->cnf.disable_ipv6) {
1615 struct in6_addr addr;
1617 addr.s6_addr32[0] = htonl(0xfe800000);
1618 addr.s6_addr32[1] = 0;
1620 if (!ipv6_generate_eui64(addr.s6_addr + 8, idev->dev) &&
1621 ipv6_addr_equal(&ifp->addr, &addr)) {
1622 /* DAD failed for link-local based on MAC address */
1623 idev->cnf.disable_ipv6 = 1;
1625 pr_info("%s: IPv6 being disabled!\n",
1626 ifp->idev->dev->name);
1630 addrconf_dad_stop(ifp, 1);
1633 /* Join to solicited addr multicast group. */
1635 void addrconf_join_solict(struct net_device *dev, const struct in6_addr *addr)
1637 struct in6_addr maddr;
1639 if (dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1642 addrconf_addr_solict_mult(addr, &maddr);
1643 ipv6_dev_mc_inc(dev, &maddr);
1646 void addrconf_leave_solict(struct inet6_dev *idev, const struct in6_addr *addr)
1648 struct in6_addr maddr;
1650 if (idev->dev->flags&(IFF_LOOPBACK|IFF_NOARP))
1653 addrconf_addr_solict_mult(addr, &maddr);
1654 __ipv6_dev_mc_dec(idev, &maddr);
1657 static void addrconf_join_anycast(struct inet6_ifaddr *ifp)
1659 struct in6_addr addr;
1660 if (ifp->prefix_len == 127) /* RFC 6164 */
1662 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1663 if (ipv6_addr_any(&addr))
1665 ipv6_dev_ac_inc(ifp->idev->dev, &addr);
1668 static void addrconf_leave_anycast(struct inet6_ifaddr *ifp)
1670 struct in6_addr addr;
1671 if (ifp->prefix_len == 127) /* RFC 6164 */
1673 ipv6_addr_prefix(&addr, &ifp->addr, ifp->prefix_len);
1674 if (ipv6_addr_any(&addr))
1676 __ipv6_dev_ac_dec(ifp->idev, &addr);
1679 static int addrconf_ifid_eui48(u8 *eui, struct net_device *dev)
1681 if (dev->addr_len != ETH_ALEN)
1683 memcpy(eui, dev->dev_addr, 3);
1684 memcpy(eui + 5, dev->dev_addr + 3, 3);
1687 * The zSeries OSA network cards can be shared among various
1688 * OS instances, but the OSA cards have only one MAC address.
1689 * This leads to duplicate address conflicts in conjunction
1690 * with IPv6 if more than one instance uses the same card.
1692 * The driver for these cards can deliver a unique 16-bit
1693 * identifier for each instance sharing the same card. It is
1694 * placed instead of 0xFFFE in the interface identifier. The
1695 * "u" bit of the interface identifier is not inverted in this
1696 * case. Hence the resulting interface identifier has local
1697 * scope according to RFC2373.
1700 eui[3] = (dev->dev_id >> 8) & 0xFF;
1701 eui[4] = dev->dev_id & 0xFF;
1710 static int addrconf_ifid_eui64(u8 *eui, struct net_device *dev)
1712 if (dev->addr_len != IEEE802154_ADDR_LEN)
1714 memcpy(eui, dev->dev_addr, 8);
1719 static int addrconf_ifid_ieee1394(u8 *eui, struct net_device *dev)
1721 union fwnet_hwaddr *ha;
1723 if (dev->addr_len != FWNET_ALEN)
1726 ha = (union fwnet_hwaddr *)dev->dev_addr;
1728 memcpy(eui, &ha->uc.uniq_id, sizeof(ha->uc.uniq_id));
1733 static int addrconf_ifid_arcnet(u8 *eui, struct net_device *dev)
1735 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1736 if (dev->addr_len != ARCNET_ALEN)
1739 eui[7] = *(u8 *)dev->dev_addr;
1743 static int addrconf_ifid_infiniband(u8 *eui, struct net_device *dev)
1745 if (dev->addr_len != INFINIBAND_ALEN)
1747 memcpy(eui, dev->dev_addr + 12, 8);
1752 static int __ipv6_isatap_ifid(u8 *eui, __be32 addr)
1756 eui[0] = (ipv4_is_zeronet(addr) || ipv4_is_private_10(addr) ||
1757 ipv4_is_loopback(addr) || ipv4_is_linklocal_169(addr) ||
1758 ipv4_is_private_172(addr) || ipv4_is_test_192(addr) ||
1759 ipv4_is_anycast_6to4(addr) || ipv4_is_private_192(addr) ||
1760 ipv4_is_test_198(addr) || ipv4_is_multicast(addr) ||
1761 ipv4_is_lbcast(addr)) ? 0x00 : 0x02;
1765 memcpy(eui + 4, &addr, 4);
1769 static int addrconf_ifid_sit(u8 *eui, struct net_device *dev)
1771 if (dev->priv_flags & IFF_ISATAP)
1772 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
1776 static int addrconf_ifid_gre(u8 *eui, struct net_device *dev)
1778 return __ipv6_isatap_ifid(eui, *(__be32 *)dev->dev_addr);
1781 static int addrconf_ifid_ip6tnl(u8 *eui, struct net_device *dev)
1783 memcpy(eui, dev->perm_addr, 3);
1784 memcpy(eui + 5, dev->perm_addr + 3, 3);
1791 static int ipv6_generate_eui64(u8 *eui, struct net_device *dev)
1793 switch (dev->type) {
1796 return addrconf_ifid_eui48(eui, dev);
1798 return addrconf_ifid_arcnet(eui, dev);
1799 case ARPHRD_INFINIBAND:
1800 return addrconf_ifid_infiniband(eui, dev);
1802 return addrconf_ifid_sit(eui, dev);
1804 return addrconf_ifid_gre(eui, dev);
1805 case ARPHRD_IEEE802154:
1806 return addrconf_ifid_eui64(eui, dev);
1807 case ARPHRD_IEEE1394:
1808 return addrconf_ifid_ieee1394(eui, dev);
1809 case ARPHRD_TUNNEL6:
1810 return addrconf_ifid_ip6tnl(eui, dev);
1815 static int ipv6_inherit_eui64(u8 *eui, struct inet6_dev *idev)
1818 struct inet6_ifaddr *ifp;
1820 read_lock_bh(&idev->lock);
1821 list_for_each_entry(ifp, &idev->addr_list, if_list) {
1822 if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) {
1823 memcpy(eui, ifp->addr.s6_addr+8, 8);
1828 read_unlock_bh(&idev->lock);
1832 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1833 static void __ipv6_regen_rndid(struct inet6_dev *idev)
1836 get_random_bytes(idev->rndid, sizeof(idev->rndid));
1837 idev->rndid[0] &= ~0x02;
1840 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1841 * check if generated address is not inappropriate
1843 * - Reserved subnet anycast (RFC 2526)
1844 * 11111101 11....11 1xxxxxxx
1845 * - ISATAP (RFC4214) 6.1
1846 * 00-00-5E-FE-xx-xx-xx-xx
1848 * - XXX: already assigned to an address on the device
1850 if (idev->rndid[0] == 0xfd &&
1851 (idev->rndid[1]&idev->rndid[2]&idev->rndid[3]&idev->rndid[4]&idev->rndid[5]&idev->rndid[6]) == 0xff &&
1852 (idev->rndid[7]&0x80))
1854 if ((idev->rndid[0]|idev->rndid[1]) == 0) {
1855 if (idev->rndid[2] == 0x5e && idev->rndid[3] == 0xfe)
1857 if ((idev->rndid[2]|idev->rndid[3]|idev->rndid[4]|idev->rndid[5]|idev->rndid[6]|idev->rndid[7]) == 0x00)
1862 static void ipv6_regen_rndid(unsigned long data)
1864 struct inet6_dev *idev = (struct inet6_dev *) data;
1865 unsigned long expires;
1868 write_lock_bh(&idev->lock);
1873 __ipv6_regen_rndid(idev);
1876 idev->cnf.temp_prefered_lft * HZ -
1877 idev->cnf.regen_max_retry * idev->cnf.dad_transmits * idev->nd_parms->retrans_time -
1878 idev->cnf.max_desync_factor * HZ;
1879 if (time_before(expires, jiffies)) {
1880 pr_warn("%s: too short regeneration interval; timer disabled for %s\n",
1881 __func__, idev->dev->name);
1885 if (!mod_timer(&idev->regen_timer, expires))
1889 write_unlock_bh(&idev->lock);
1890 rcu_read_unlock_bh();
1894 static void __ipv6_try_regen_rndid(struct inet6_dev *idev, struct in6_addr *tmpaddr)
1896 if (tmpaddr && memcmp(idev->rndid, &tmpaddr->s6_addr[8], 8) == 0)
1897 __ipv6_regen_rndid(idev);
1905 addrconf_prefix_route(struct in6_addr *pfx, int plen, struct net_device *dev,
1906 unsigned long expires, u32 flags)
1908 struct fib6_config cfg = {
1909 .fc_table = RT6_TABLE_PREFIX,
1910 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1911 .fc_ifindex = dev->ifindex,
1912 .fc_expires = expires,
1914 .fc_flags = RTF_UP | flags,
1915 .fc_nlinfo.nl_net = dev_net(dev),
1916 .fc_protocol = RTPROT_KERNEL,
1921 /* Prevent useless cloning on PtP SIT.
1922 This thing is done here expecting that the whole
1923 class of non-broadcast devices need not cloning.
1925 #if IS_ENABLED(CONFIG_IPV6_SIT)
1926 if (dev->type == ARPHRD_SIT && (dev->flags & IFF_POINTOPOINT))
1927 cfg.fc_flags |= RTF_NONEXTHOP;
1930 ip6_route_add(&cfg);
1934 static struct rt6_info *addrconf_get_prefix_route(const struct in6_addr *pfx,
1936 const struct net_device *dev,
1937 u32 flags, u32 noflags)
1939 struct fib6_node *fn;
1940 struct rt6_info *rt = NULL;
1941 struct fib6_table *table;
1943 table = fib6_get_table(dev_net(dev), RT6_TABLE_PREFIX);
1947 read_lock_bh(&table->tb6_lock);
1948 fn = fib6_locate(&table->tb6_root, pfx, plen, NULL, 0);
1951 for (rt = fn->leaf; rt; rt = rt->dst.rt6_next) {
1952 if (rt->dst.dev->ifindex != dev->ifindex)
1954 if ((rt->rt6i_flags & flags) != flags)
1956 if ((rt->rt6i_flags & noflags) != 0)
1962 read_unlock_bh(&table->tb6_lock);
1967 /* Create "default" multicast route to the interface */
1969 static void addrconf_add_mroute(struct net_device *dev)
1971 struct fib6_config cfg = {
1972 .fc_table = RT6_TABLE_LOCAL,
1973 .fc_metric = IP6_RT_PRIO_ADDRCONF,
1974 .fc_ifindex = dev->ifindex,
1977 .fc_nlinfo.nl_net = dev_net(dev),
1980 ipv6_addr_set(&cfg.fc_dst, htonl(0xFF000000), 0, 0, 0);
1982 ip6_route_add(&cfg);
1985 static struct inet6_dev *addrconf_add_dev(struct net_device *dev)
1987 struct inet6_dev *idev;
1991 idev = ipv6_find_idev(dev);
1993 return ERR_PTR(-ENOBUFS);
1995 if (idev->cnf.disable_ipv6)
1996 return ERR_PTR(-EACCES);
1998 /* Add default multicast route */
1999 if (!(dev->flags & IFF_LOOPBACK))
2000 addrconf_add_mroute(dev);
2005 void addrconf_prefix_rcv(struct net_device *dev, u8 *opt, int len, bool sllao)
2007 struct prefix_info *pinfo;
2011 struct inet6_dev *in6_dev;
2012 struct net *net = dev_net(dev);
2014 pinfo = (struct prefix_info *) opt;
2016 if (len < sizeof(struct prefix_info)) {
2017 ADBG("addrconf: prefix option too short\n");
2022 * Validation checks ([ADDRCONF], page 19)
2025 addr_type = ipv6_addr_type(&pinfo->prefix);
2027 if (addr_type & (IPV6_ADDR_MULTICAST|IPV6_ADDR_LINKLOCAL))
2030 valid_lft = ntohl(pinfo->valid);
2031 prefered_lft = ntohl(pinfo->prefered);
2033 if (prefered_lft > valid_lft) {
2034 net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n");
2038 in6_dev = in6_dev_get(dev);
2040 if (in6_dev == NULL) {
2041 net_dbg_ratelimited("addrconf: device %s not configured\n",
2047 * Two things going on here:
2048 * 1) Add routes for on-link prefixes
2049 * 2) Configure prefixes with the auto flag set
2052 if (pinfo->onlink) {
2053 struct rt6_info *rt;
2054 unsigned long rt_expires;
2056 /* Avoid arithmetic overflow. Really, we could
2057 * save rt_expires in seconds, likely valid_lft,
2058 * but it would require division in fib gc, that it
2062 rt_expires = addrconf_timeout_fixup(valid_lft, HZ);
2064 rt_expires = addrconf_timeout_fixup(valid_lft, USER_HZ);
2066 if (addrconf_finite_timeout(rt_expires))
2069 rt = addrconf_get_prefix_route(&pinfo->prefix,
2072 RTF_ADDRCONF | RTF_PREFIX_RT,
2073 RTF_GATEWAY | RTF_DEFAULT);
2076 /* Autoconf prefix route */
2077 if (valid_lft == 0) {
2080 } else if (addrconf_finite_timeout(rt_expires)) {
2082 rt6_set_expires(rt, jiffies + rt_expires);
2084 rt6_clean_expires(rt);
2086 } else if (valid_lft) {
2087 clock_t expires = 0;
2088 int flags = RTF_ADDRCONF | RTF_PREFIX_RT;
2089 if (addrconf_finite_timeout(rt_expires)) {
2091 flags |= RTF_EXPIRES;
2092 expires = jiffies_to_clock_t(rt_expires);
2094 addrconf_prefix_route(&pinfo->prefix, pinfo->prefix_len,
2095 dev, expires, flags);
2100 /* Try to figure out our local address for this prefix */
2102 if (pinfo->autoconf && in6_dev->cnf.autoconf) {
2103 struct inet6_ifaddr *ifp;
2104 struct in6_addr addr;
2105 int create = 0, update_lft = 0;
2106 bool tokenized = false;
2108 if (pinfo->prefix_len == 64) {
2109 memcpy(&addr, &pinfo->prefix, 8);
2111 if (!ipv6_addr_any(&in6_dev->token)) {
2112 read_lock_bh(&in6_dev->lock);
2113 memcpy(addr.s6_addr + 8,
2114 in6_dev->token.s6_addr + 8, 8);
2115 read_unlock_bh(&in6_dev->lock);
2117 } else if (ipv6_generate_eui64(addr.s6_addr + 8, dev) &&
2118 ipv6_inherit_eui64(addr.s6_addr + 8, in6_dev)) {
2119 in6_dev_put(in6_dev);
2124 net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n",
2126 in6_dev_put(in6_dev);
2131 ifp = ipv6_get_ifaddr(net, &addr, dev, 1);
2133 if (ifp == NULL && valid_lft) {
2134 int max_addresses = in6_dev->cnf.max_addresses;
2137 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2138 if (in6_dev->cnf.optimistic_dad &&
2139 !net->ipv6.devconf_all->forwarding && sllao)
2140 addr_flags = IFA_F_OPTIMISTIC;
2143 /* Do not allow to create too much of autoconfigured
2144 * addresses; this would be too easy way to crash kernel.
2146 if (!max_addresses ||
2147 ipv6_count_addresses(in6_dev) < max_addresses)
2148 ifp = ipv6_add_addr(in6_dev, &addr, NULL,
2150 addr_type&IPV6_ADDR_SCOPE_MASK,
2151 addr_flags, valid_lft,
2154 if (IS_ERR_OR_NULL(ifp)) {
2155 in6_dev_put(in6_dev);
2161 ifp->cstamp = jiffies;
2162 ifp->tokenized = tokenized;
2163 addrconf_dad_start(ifp);
2169 struct inet6_ifaddr *ift;
2172 /* update lifetime (RFC2462 5.5.3 e) */
2173 spin_lock(&ifp->lock);
2175 if (ifp->valid_lft > (now - ifp->tstamp) / HZ)
2176 stored_lft = ifp->valid_lft - (now - ifp->tstamp) / HZ;
2179 if (!update_lft && !create && stored_lft) {
2180 const u32 minimum_lft = min(
2181 stored_lft, (u32)MIN_VALID_LIFETIME);
2182 valid_lft = max(valid_lft, minimum_lft);
2184 /* RFC4862 Section 5.5.3e:
2185 * "Note that the preferred lifetime of the
2186 * corresponding address is always reset to
2187 * the Preferred Lifetime in the received
2188 * Prefix Information option, regardless of
2189 * whether the valid lifetime is also reset or
2192 * So we should always update prefered_lft here.
2198 ifp->valid_lft = valid_lft;
2199 ifp->prefered_lft = prefered_lft;
2202 ifp->flags &= ~IFA_F_DEPRECATED;
2203 spin_unlock(&ifp->lock);
2205 if (!(flags&IFA_F_TENTATIVE))
2206 ipv6_ifa_notify(0, ifp);
2208 spin_unlock(&ifp->lock);
2210 read_lock_bh(&in6_dev->lock);
2211 /* update all temporary addresses in the list */
2212 list_for_each_entry(ift, &in6_dev->tempaddr_list,
2214 int age, max_valid, max_prefered;
2216 if (ifp != ift->ifpub)
2220 * RFC 4941 section 3.3:
2221 * If a received option will extend the lifetime
2222 * of a public address, the lifetimes of
2223 * temporary addresses should be extended,
2224 * subject to the overall constraint that no
2225 * temporary addresses should ever remain
2226 * "valid" or "preferred" for a time longer than
2227 * (TEMP_VALID_LIFETIME) or
2228 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR),
2231 age = (now - ift->cstamp) / HZ;
2232 max_valid = in6_dev->cnf.temp_valid_lft - age;
2236 max_prefered = in6_dev->cnf.temp_prefered_lft -
2237 in6_dev->cnf.max_desync_factor -
2239 if (max_prefered < 0)
2242 if (valid_lft > max_valid)
2243 valid_lft = max_valid;
2245 if (prefered_lft > max_prefered)
2246 prefered_lft = max_prefered;
2248 spin_lock(&ift->lock);
2250 ift->valid_lft = valid_lft;
2251 ift->prefered_lft = prefered_lft;
2253 if (prefered_lft > 0)
2254 ift->flags &= ~IFA_F_DEPRECATED;
2256 spin_unlock(&ift->lock);
2257 if (!(flags&IFA_F_TENTATIVE))
2258 ipv6_ifa_notify(0, ift);
2261 if ((create || list_empty(&in6_dev->tempaddr_list)) && in6_dev->cnf.use_tempaddr > 0) {
2263 * When a new public address is created as
2264 * described in [ADDRCONF], also create a new
2265 * temporary address. Also create a temporary
2266 * address if it's enabled but no temporary
2267 * address currently exists.
2269 read_unlock_bh(&in6_dev->lock);
2270 ipv6_create_tempaddr(ifp, NULL);
2272 read_unlock_bh(&in6_dev->lock);
2279 inet6_prefix_notify(RTM_NEWPREFIX, in6_dev, pinfo);
2280 in6_dev_put(in6_dev);
2284 * Set destination address.
2285 * Special case for SIT interfaces where we create a new "virtual"
2288 int addrconf_set_dstaddr(struct net *net, void __user *arg)
2290 struct in6_ifreq ireq;
2291 struct net_device *dev;
2297 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2300 dev = __dev_get_by_index(net, ireq.ifr6_ifindex);
2306 #if IS_ENABLED(CONFIG_IPV6_SIT)
2307 if (dev->type == ARPHRD_SIT) {
2308 const struct net_device_ops *ops = dev->netdev_ops;
2310 struct ip_tunnel_parm p;
2312 err = -EADDRNOTAVAIL;
2313 if (!(ipv6_addr_type(&ireq.ifr6_addr) & IPV6_ADDR_COMPATv4))
2316 memset(&p, 0, sizeof(p));
2317 p.iph.daddr = ireq.ifr6_addr.s6_addr32[3];
2321 p.iph.protocol = IPPROTO_IPV6;
2323 ifr.ifr_ifru.ifru_data = (__force void __user *)&p;
2325 if (ops->ndo_do_ioctl) {
2326 mm_segment_t oldfs = get_fs();
2329 err = ops->ndo_do_ioctl(dev, &ifr, SIOCADDTUNNEL);
2336 dev = __dev_get_by_name(net, p.name);
2339 err = dev_open(dev);
2350 * Manual configuration of address on an interface
2352 static int inet6_addr_add(struct net *net, int ifindex, const struct in6_addr *pfx,
2353 const struct in6_addr *peer_pfx,
2354 unsigned int plen, __u8 ifa_flags, __u32 prefered_lft,
2357 struct inet6_ifaddr *ifp;
2358 struct inet6_dev *idev;
2359 struct net_device *dev;
2363 unsigned long timeout;
2370 /* check the lifetime */
2371 if (!valid_lft || prefered_lft > valid_lft)
2374 dev = __dev_get_by_index(net, ifindex);
2378 idev = addrconf_add_dev(dev);
2380 return PTR_ERR(idev);
2382 scope = ipv6_addr_scope(pfx);
2384 timeout = addrconf_timeout_fixup(valid_lft, HZ);
2385 if (addrconf_finite_timeout(timeout)) {
2386 expires = jiffies_to_clock_t(timeout * HZ);
2387 valid_lft = timeout;
2388 flags = RTF_EXPIRES;
2392 ifa_flags |= IFA_F_PERMANENT;
2395 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
2396 if (addrconf_finite_timeout(timeout)) {
2398 ifa_flags |= IFA_F_DEPRECATED;
2399 prefered_lft = timeout;
2402 ifp = ipv6_add_addr(idev, pfx, peer_pfx, plen, scope, ifa_flags,
2403 valid_lft, prefered_lft);
2406 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, dev,
2409 * Note that section 3.1 of RFC 4429 indicates
2410 * that the Optimistic flag should not be set for
2411 * manually configured addresses
2413 addrconf_dad_start(ifp);
2419 return PTR_ERR(ifp);
2422 static int inet6_addr_del(struct net *net, int ifindex, const struct in6_addr *pfx,
2425 struct inet6_ifaddr *ifp;
2426 struct inet6_dev *idev;
2427 struct net_device *dev;
2432 dev = __dev_get_by_index(net, ifindex);
2436 if ((idev = __in6_dev_get(dev)) == NULL)
2439 read_lock_bh(&idev->lock);
2440 list_for_each_entry(ifp, &idev->addr_list, if_list) {
2441 if (ifp->prefix_len == plen &&
2442 ipv6_addr_equal(pfx, &ifp->addr)) {
2444 read_unlock_bh(&idev->lock);
2450 read_unlock_bh(&idev->lock);
2451 return -EADDRNOTAVAIL;
2455 int addrconf_add_ifaddr(struct net *net, void __user *arg)
2457 struct in6_ifreq ireq;
2460 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2463 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2467 err = inet6_addr_add(net, ireq.ifr6_ifindex, &ireq.ifr6_addr, NULL,
2468 ireq.ifr6_prefixlen, IFA_F_PERMANENT,
2469 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME);
2474 int addrconf_del_ifaddr(struct net *net, void __user *arg)
2476 struct in6_ifreq ireq;
2479 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
2482 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
2486 err = inet6_addr_del(net, ireq.ifr6_ifindex, &ireq.ifr6_addr,
2487 ireq.ifr6_prefixlen);
2492 static void add_addr(struct inet6_dev *idev, const struct in6_addr *addr,
2493 int plen, int scope)
2495 struct inet6_ifaddr *ifp;
2497 ifp = ipv6_add_addr(idev, addr, NULL, plen,
2498 scope, IFA_F_PERMANENT, 0, 0);
2500 spin_lock_bh(&ifp->lock);
2501 ifp->flags &= ~IFA_F_TENTATIVE;
2502 spin_unlock_bh(&ifp->lock);
2503 ipv6_ifa_notify(RTM_NEWADDR, ifp);
2508 #if IS_ENABLED(CONFIG_IPV6_SIT)
2509 static void sit_add_v4_addrs(struct inet6_dev *idev)
2511 struct in6_addr addr;
2512 struct net_device *dev;
2513 struct net *net = dev_net(idev->dev);
2519 memset(&addr, 0, sizeof(struct in6_addr));
2520 memcpy(&addr.s6_addr32[3], idev->dev->dev_addr, 4);
2522 if (idev->dev->flags&IFF_POINTOPOINT) {
2523 addr.s6_addr32[0] = htonl(0xfe800000);
2527 scope = IPV6_ADDR_COMPATv4;
2529 pflags |= RTF_NONEXTHOP;
2532 if (addr.s6_addr32[3]) {
2533 add_addr(idev, &addr, plen, scope);
2534 addrconf_prefix_route(&addr, plen, idev->dev, 0, pflags);
2538 for_each_netdev(net, dev) {
2539 struct in_device *in_dev = __in_dev_get_rtnl(dev);
2540 if (in_dev && (dev->flags & IFF_UP)) {
2541 struct in_ifaddr *ifa;
2545 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
2547 addr.s6_addr32[3] = ifa->ifa_local;
2549 if (ifa->ifa_scope == RT_SCOPE_LINK)
2551 if (ifa->ifa_scope >= RT_SCOPE_HOST) {
2552 if (idev->dev->flags&IFF_POINTOPOINT)
2557 add_addr(idev, &addr, plen, flag);
2558 addrconf_prefix_route(&addr, plen, idev->dev, 0,
2566 static void init_loopback(struct net_device *dev)
2568 struct inet6_dev *idev;
2569 struct net_device *sp_dev;
2570 struct inet6_ifaddr *sp_ifa;
2571 struct rt6_info *sp_rt;
2577 if ((idev = ipv6_find_idev(dev)) == NULL) {
2578 pr_debug("%s: add_dev failed\n", __func__);
2582 add_addr(idev, &in6addr_loopback, 128, IFA_HOST);
2584 /* Add routes to other interface's IPv6 addresses */
2585 for_each_netdev(dev_net(dev), sp_dev) {
2586 if (!strcmp(sp_dev->name, dev->name))
2589 idev = __in6_dev_get(sp_dev);
2593 read_lock_bh(&idev->lock);
2594 list_for_each_entry(sp_ifa, &idev->addr_list, if_list) {
2596 if (sp_ifa->flags & (IFA_F_DADFAILED | IFA_F_TENTATIVE))
2602 sp_rt = addrconf_dst_alloc(idev, &sp_ifa->addr, 0);
2604 /* Failure cases are ignored */
2605 if (!IS_ERR(sp_rt)) {
2610 read_unlock_bh(&idev->lock);
2614 static void addrconf_add_linklocal(struct inet6_dev *idev, const struct in6_addr *addr)
2616 struct inet6_ifaddr *ifp;
2617 u32 addr_flags = IFA_F_PERMANENT;
2619 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2620 if (idev->cnf.optimistic_dad &&
2621 !dev_net(idev->dev)->ipv6.devconf_all->forwarding)
2622 addr_flags |= IFA_F_OPTIMISTIC;
2626 ifp = ipv6_add_addr(idev, addr, NULL, 64, IFA_LINK, addr_flags, 0, 0);
2628 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, idev->dev, 0, 0);
2629 addrconf_dad_start(ifp);
2634 static void addrconf_dev_config(struct net_device *dev)
2636 struct in6_addr addr;
2637 struct inet6_dev *idev;
2641 if ((dev->type != ARPHRD_ETHER) &&
2642 (dev->type != ARPHRD_FDDI) &&
2643 (dev->type != ARPHRD_ARCNET) &&
2644 (dev->type != ARPHRD_INFINIBAND) &&
2645 (dev->type != ARPHRD_IEEE802154) &&
2646 (dev->type != ARPHRD_IEEE1394) &&
2647 (dev->type != ARPHRD_TUNNEL6)) {
2648 /* Alas, we support only Ethernet autoconfiguration. */
2652 idev = addrconf_add_dev(dev);
2656 memset(&addr, 0, sizeof(struct in6_addr));
2657 addr.s6_addr32[0] = htonl(0xFE800000);
2659 if (ipv6_generate_eui64(addr.s6_addr + 8, dev) == 0)
2660 addrconf_add_linklocal(idev, &addr);
2663 #if IS_ENABLED(CONFIG_IPV6_SIT)
2664 static void addrconf_sit_config(struct net_device *dev)
2666 struct inet6_dev *idev;
2671 * Configure the tunnel with one of our IPv4
2672 * addresses... we should configure all of
2673 * our v4 addrs in the tunnel
2676 if ((idev = ipv6_find_idev(dev)) == NULL) {
2677 pr_debug("%s: add_dev failed\n", __func__);
2681 if (dev->priv_flags & IFF_ISATAP) {
2682 struct in6_addr addr;
2684 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
2685 addrconf_prefix_route(&addr, 64, dev, 0, 0);
2686 if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
2687 addrconf_add_linklocal(idev, &addr);
2691 sit_add_v4_addrs(idev);
2693 if (dev->flags&IFF_POINTOPOINT)
2694 addrconf_add_mroute(dev);
2698 #if IS_ENABLED(CONFIG_NET_IPGRE)
2699 static void addrconf_gre_config(struct net_device *dev)
2701 struct inet6_dev *idev;
2702 struct in6_addr addr;
2706 if ((idev = ipv6_find_idev(dev)) == NULL) {
2707 pr_debug("%s: add_dev failed\n", __func__);
2711 ipv6_addr_set(&addr, htonl(0xFE800000), 0, 0, 0);
2712 addrconf_prefix_route(&addr, 64, dev, 0, 0);
2714 if (!ipv6_generate_eui64(addr.s6_addr + 8, dev))
2715 addrconf_add_linklocal(idev, &addr);
2720 ipv6_inherit_linklocal(struct inet6_dev *idev, struct net_device *link_dev)
2722 struct in6_addr lladdr;
2724 if (!ipv6_get_lladdr(link_dev, &lladdr, IFA_F_TENTATIVE)) {
2725 addrconf_add_linklocal(idev, &lladdr);
2731 static int addrconf_notify(struct notifier_block *this, unsigned long event,
2734 struct net_device *dev = netdev_notifier_info_to_dev(ptr);
2735 struct inet6_dev *idev = __in6_dev_get(dev);
2736 int run_pending = 0;
2740 case NETDEV_REGISTER:
2741 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
2742 idev = ipv6_add_dev(dev);
2744 return notifier_from_errno(-ENOMEM);
2750 if (dev->flags & IFF_SLAVE)
2753 if (event == NETDEV_UP) {
2754 if (!addrconf_qdisc_ok(dev)) {
2755 /* device is not ready yet. */
2756 pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n",
2761 if (!idev && dev->mtu >= IPV6_MIN_MTU)
2762 idev = ipv6_add_dev(dev);
2765 idev->if_flags |= IF_READY;
2769 if (!addrconf_qdisc_ok(dev)) {
2770 /* device is still not ready. */
2775 if (idev->if_flags & IF_READY)
2776 /* device is already configured. */
2778 idev->if_flags |= IF_READY;
2781 pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n",
2787 switch (dev->type) {
2788 #if IS_ENABLED(CONFIG_IPV6_SIT)
2790 addrconf_sit_config(dev);
2793 #if IS_ENABLED(CONFIG_NET_IPGRE)
2795 addrconf_gre_config(dev);
2798 case ARPHRD_LOOPBACK:
2803 addrconf_dev_config(dev);
2809 addrconf_dad_run(idev);
2812 * If the MTU changed during the interface down,
2813 * when the interface up, the changed MTU must be
2814 * reflected in the idev as well as routers.
2816 if (idev->cnf.mtu6 != dev->mtu &&
2817 dev->mtu >= IPV6_MIN_MTU) {
2818 rt6_mtu_change(dev, dev->mtu);
2819 idev->cnf.mtu6 = dev->mtu;
2821 idev->tstamp = jiffies;
2822 inet6_ifinfo_notify(RTM_NEWLINK, idev);
2825 * If the changed mtu during down is lower than
2826 * IPV6_MIN_MTU stop IPv6 on this interface.
2828 if (dev->mtu < IPV6_MIN_MTU)
2829 addrconf_ifdown(dev, 1);
2833 case NETDEV_CHANGEMTU:
2834 if (idev && dev->mtu >= IPV6_MIN_MTU) {
2835 rt6_mtu_change(dev, dev->mtu);
2836 idev->cnf.mtu6 = dev->mtu;
2840 if (!idev && dev->mtu >= IPV6_MIN_MTU) {
2841 idev = ipv6_add_dev(dev);
2847 * MTU falled under IPV6_MIN_MTU.
2848 * Stop IPv6 on this interface.
2852 case NETDEV_UNREGISTER:
2854 * Remove all addresses from this interface.
2856 addrconf_ifdown(dev, event != NETDEV_DOWN);
2859 case NETDEV_CHANGENAME:
2861 snmp6_unregister_dev(idev);
2862 addrconf_sysctl_unregister(idev);
2863 addrconf_sysctl_register(idev);
2864 err = snmp6_register_dev(idev);
2866 return notifier_from_errno(err);
2870 case NETDEV_PRE_TYPE_CHANGE:
2871 case NETDEV_POST_TYPE_CHANGE:
2872 addrconf_type_change(dev, event);
2880 * addrconf module should be notified of a device going up
2882 static struct notifier_block ipv6_dev_notf = {
2883 .notifier_call = addrconf_notify,
2886 static void addrconf_type_change(struct net_device *dev, unsigned long event)
2888 struct inet6_dev *idev;
2891 idev = __in6_dev_get(dev);
2893 if (event == NETDEV_POST_TYPE_CHANGE)
2894 ipv6_mc_remap(idev);
2895 else if (event == NETDEV_PRE_TYPE_CHANGE)
2896 ipv6_mc_unmap(idev);
2899 static int addrconf_ifdown(struct net_device *dev, int how)
2901 struct net *net = dev_net(dev);
2902 struct inet6_dev *idev;
2903 struct inet6_ifaddr *ifa;
2908 rt6_ifdown(net, dev);
2909 neigh_ifdown(&nd_tbl, dev);
2911 idev = __in6_dev_get(dev);
2916 * Step 1: remove reference to ipv6 device from parent device.
2922 /* protected by rtnl_lock */
2923 RCU_INIT_POINTER(dev->ip6_ptr, NULL);
2925 /* Step 1.5: remove snmp6 entry */
2926 snmp6_unregister_dev(idev);
2930 /* Step 2: clear hash table */
2931 for (i = 0; i < IN6_ADDR_HSIZE; i++) {
2932 struct hlist_head *h = &inet6_addr_lst[i];
2934 spin_lock_bh(&addrconf_hash_lock);
2936 hlist_for_each_entry_rcu(ifa, h, addr_lst) {
2937 if (ifa->idev == idev) {
2938 hlist_del_init_rcu(&ifa->addr_lst);
2939 addrconf_del_dad_timer(ifa);
2943 spin_unlock_bh(&addrconf_hash_lock);
2946 write_lock_bh(&idev->lock);
2948 addrconf_del_rs_timer(idev);
2950 /* Step 2: clear flags for stateless addrconf */
2952 idev->if_flags &= ~(IF_RS_SENT|IF_RA_RCVD|IF_READY);
2954 if (how && del_timer(&idev->regen_timer))
2957 /* Step 3: clear tempaddr list */
2958 while (!list_empty(&idev->tempaddr_list)) {
2959 ifa = list_first_entry(&idev->tempaddr_list,
2960 struct inet6_ifaddr, tmp_list);
2961 list_del(&ifa->tmp_list);
2962 write_unlock_bh(&idev->lock);
2963 spin_lock_bh(&ifa->lock);
2966 in6_ifa_put(ifa->ifpub);
2969 spin_unlock_bh(&ifa->lock);
2971 write_lock_bh(&idev->lock);
2974 while (!list_empty(&idev->addr_list)) {
2975 ifa = list_first_entry(&idev->addr_list,
2976 struct inet6_ifaddr, if_list);
2977 addrconf_del_dad_timer(ifa);
2979 list_del(&ifa->if_list);
2981 write_unlock_bh(&idev->lock);
2983 spin_lock_bh(&ifa->state_lock);
2985 ifa->state = INET6_IFADDR_STATE_DEAD;
2986 spin_unlock_bh(&ifa->state_lock);
2988 if (state != INET6_IFADDR_STATE_DEAD) {
2989 __ipv6_ifa_notify(RTM_DELADDR, ifa);
2990 inet6addr_notifier_call_chain(NETDEV_DOWN, ifa);
2994 write_lock_bh(&idev->lock);
2997 write_unlock_bh(&idev->lock);
2999 /* Step 5: Discard multicast list */
3001 ipv6_mc_destroy_dev(idev);
3005 idev->tstamp = jiffies;
3007 /* Last: Shot the device (if unregistered) */
3009 addrconf_sysctl_unregister(idev);
3010 neigh_parms_release(&nd_tbl, idev->nd_parms);
3011 neigh_ifdown(&nd_tbl, dev);
3017 static void addrconf_rs_timer(unsigned long data)
3019 struct inet6_dev *idev = (struct inet6_dev *)data;
3020 struct net_device *dev = idev->dev;
3021 struct in6_addr lladdr;
3023 write_lock(&idev->lock);
3024 if (idev->dead || !(idev->if_flags & IF_READY))
3027 if (!ipv6_accept_ra(idev))
3030 /* Announcement received after solicitation was sent */
3031 if (idev->if_flags & IF_RA_RCVD)
3034 if (idev->rs_probes++ < idev->cnf.rtr_solicits) {
3035 write_unlock(&idev->lock);
3036 if (!ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE))
3037 ndisc_send_rs(dev, &lladdr,
3038 &in6addr_linklocal_allrouters);
3042 write_lock(&idev->lock);
3043 /* The wait after the last probe can be shorter */
3044 addrconf_mod_rs_timer(idev, (idev->rs_probes ==
3045 idev->cnf.rtr_solicits) ?
3046 idev->cnf.rtr_solicit_delay :
3047 idev->cnf.rtr_solicit_interval);
3050 * Note: we do not support deprecated "all on-link"
3051 * assumption any longer.
3053 pr_debug("%s: no IPv6 routers present\n", idev->dev->name);
3057 write_unlock(&idev->lock);
3063 * Duplicate Address Detection
3065 static void addrconf_dad_kick(struct inet6_ifaddr *ifp)
3067 unsigned long rand_num;
3068 struct inet6_dev *idev = ifp->idev;
3070 if (ifp->flags & IFA_F_OPTIMISTIC)
3073 rand_num = net_random() % (idev->cnf.rtr_solicit_delay ? : 1);
3075 ifp->dad_probes = idev->cnf.dad_transmits;
3076 addrconf_mod_dad_timer(ifp, rand_num);
3079 static void addrconf_dad_start(struct inet6_ifaddr *ifp)
3081 struct inet6_dev *idev = ifp->idev;
3082 struct net_device *dev = idev->dev;
3084 addrconf_join_solict(dev, &ifp->addr);
3086 net_srandom(ifp->addr.s6_addr32[3]);
3088 read_lock_bh(&idev->lock);
3089 spin_lock(&ifp->lock);
3090 if (ifp->state == INET6_IFADDR_STATE_DEAD)
3093 if (dev->flags&(IFF_NOARP|IFF_LOOPBACK) ||
3094 idev->cnf.accept_dad < 1 ||
3095 !(ifp->flags&IFA_F_TENTATIVE) ||
3096 ifp->flags & IFA_F_NODAD) {
3097 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED);
3098 spin_unlock(&ifp->lock);
3099 read_unlock_bh(&idev->lock);
3101 addrconf_dad_completed(ifp);
3105 if (!(idev->if_flags & IF_READY)) {
3106 spin_unlock(&ifp->lock);
3107 read_unlock_bh(&idev->lock);
3109 * If the device is not ready:
3110 * - keep it tentative if it is a permanent address.
3111 * - otherwise, kill it.
3114 addrconf_dad_stop(ifp, 0);
3119 * Optimistic nodes can start receiving
3122 if (ifp->flags & IFA_F_OPTIMISTIC)
3123 ip6_ins_rt(ifp->rt);
3125 addrconf_dad_kick(ifp);
3127 spin_unlock(&ifp->lock);
3128 read_unlock_bh(&idev->lock);
3131 static void addrconf_dad_timer(unsigned long data)
3133 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *) data;
3134 struct inet6_dev *idev = ifp->idev;
3135 struct in6_addr mcaddr;
3137 if (!ifp->dad_probes && addrconf_dad_end(ifp))
3140 write_lock(&idev->lock);
3141 if (idev->dead || !(idev->if_flags & IF_READY)) {
3142 write_unlock(&idev->lock);
3146 spin_lock(&ifp->lock);
3147 if (ifp->state == INET6_IFADDR_STATE_DEAD) {
3148 spin_unlock(&ifp->lock);
3149 write_unlock(&idev->lock);
3153 if (ifp->dad_probes == 0) {
3155 * DAD was successful
3158 ifp->flags &= ~(IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|IFA_F_DADFAILED);
3159 spin_unlock(&ifp->lock);
3160 write_unlock(&idev->lock);
3162 addrconf_dad_completed(ifp);
3168 addrconf_mod_dad_timer(ifp, ifp->idev->nd_parms->retrans_time);
3169 spin_unlock(&ifp->lock);
3170 write_unlock(&idev->lock);
3172 /* send a neighbour solicitation for our addr */
3173 addrconf_addr_solict_mult(&ifp->addr, &mcaddr);
3174 ndisc_send_ns(ifp->idev->dev, NULL, &ifp->addr, &mcaddr, &in6addr_any);
3179 static void addrconf_dad_completed(struct inet6_ifaddr *ifp)
3181 struct net_device *dev = ifp->idev->dev;
3182 struct in6_addr lladdr;
3183 bool send_rs, send_mld;
3185 addrconf_del_dad_timer(ifp);
3188 * Configure the address for reception. Now it is valid.
3191 ipv6_ifa_notify(RTM_NEWADDR, ifp);
3193 /* If added prefix is link local and we are prepared to process
3194 router advertisements, start sending router solicitations.
3197 read_lock_bh(&ifp->idev->lock);
3198 spin_lock(&ifp->lock);
3199 send_mld = ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL &&
3200 ifp->idev->valid_ll_addr_cnt == 1;
3201 send_rs = send_mld &&
3202 ipv6_accept_ra(ifp->idev) &&
3203 ifp->idev->cnf.rtr_solicits > 0 &&
3204 (dev->flags&IFF_LOOPBACK) == 0;
3205 spin_unlock(&ifp->lock);
3206 read_unlock_bh(&ifp->idev->lock);
3208 /* While dad is in progress mld report's source address is in6_addrany.
3209 * Resend with proper ll now.
3212 ipv6_mc_dad_complete(ifp->idev);
3216 * If a host as already performed a random delay
3217 * [...] as part of DAD [...] there is no need
3218 * to delay again before sending the first RS
3220 if (ipv6_get_lladdr(dev, &lladdr, IFA_F_TENTATIVE))
3222 ndisc_send_rs(dev, &lladdr, &in6addr_linklocal_allrouters);
3224 write_lock_bh(&ifp->idev->lock);
3225 spin_lock(&ifp->lock);
3226 ifp->idev->rs_probes = 1;
3227 ifp->idev->if_flags |= IF_RS_SENT;
3228 addrconf_mod_rs_timer(ifp->idev,
3229 ifp->idev->cnf.rtr_solicit_interval);
3230 spin_unlock(&ifp->lock);
3231 write_unlock_bh(&ifp->idev->lock);
3235 static void addrconf_dad_run(struct inet6_dev *idev)
3237 struct inet6_ifaddr *ifp;
3239 read_lock_bh(&idev->lock);
3240 list_for_each_entry(ifp, &idev->addr_list, if_list) {
3241 spin_lock(&ifp->lock);
3242 if (ifp->flags & IFA_F_TENTATIVE &&
3243 ifp->state == INET6_IFADDR_STATE_DAD)
3244 addrconf_dad_kick(ifp);
3245 spin_unlock(&ifp->lock);
3247 read_unlock_bh(&idev->lock);
3250 #ifdef CONFIG_PROC_FS
3251 struct if6_iter_state {
3252 struct seq_net_private p;
3257 static struct inet6_ifaddr *if6_get_first(struct seq_file *seq, loff_t pos)
3259 struct inet6_ifaddr *ifa = NULL;
3260 struct if6_iter_state *state = seq->private;
3261 struct net *net = seq_file_net(seq);
3264 /* initial bucket if pos is 0 */
3270 for (; state->bucket < IN6_ADDR_HSIZE; ++state->bucket) {
3271 hlist_for_each_entry_rcu_bh(ifa, &inet6_addr_lst[state->bucket],
3273 if (!net_eq(dev_net(ifa->idev->dev), net))
3275 /* sync with offset */
3276 if (p < state->offset) {
3284 /* prepare for next bucket */
3291 static struct inet6_ifaddr *if6_get_next(struct seq_file *seq,
3292 struct inet6_ifaddr *ifa)
3294 struct if6_iter_state *state = seq->private;
3295 struct net *net = seq_file_net(seq);
3297 hlist_for_each_entry_continue_rcu_bh(ifa, addr_lst) {
3298 if (!net_eq(dev_net(ifa->idev->dev), net))
3304 while (++state->bucket < IN6_ADDR_HSIZE) {
3306 hlist_for_each_entry_rcu_bh(ifa,
3307 &inet6_addr_lst[state->bucket], addr_lst) {
3308 if (!net_eq(dev_net(ifa->idev->dev), net))
3318 static void *if6_seq_start(struct seq_file *seq, loff_t *pos)
3322 return if6_get_first(seq, *pos);
3325 static void *if6_seq_next(struct seq_file *seq, void *v, loff_t *pos)
3327 struct inet6_ifaddr *ifa;
3329 ifa = if6_get_next(seq, v);
3334 static void if6_seq_stop(struct seq_file *seq, void *v)
3337 rcu_read_unlock_bh();
3340 static int if6_seq_show(struct seq_file *seq, void *v)
3342 struct inet6_ifaddr *ifp = (struct inet6_ifaddr *)v;
3343 seq_printf(seq, "%pi6 %02x %02x %02x %02x %8s\n",
3345 ifp->idev->dev->ifindex,
3349 ifp->idev->dev->name);
3353 static const struct seq_operations if6_seq_ops = {
3354 .start = if6_seq_start,
3355 .next = if6_seq_next,
3356 .show = if6_seq_show,
3357 .stop = if6_seq_stop,
3360 static int if6_seq_open(struct inode *inode, struct file *file)
3362 return seq_open_net(inode, file, &if6_seq_ops,
3363 sizeof(struct if6_iter_state));
3366 static const struct file_operations if6_fops = {
3367 .owner = THIS_MODULE,
3368 .open = if6_seq_open,
3370 .llseek = seq_lseek,
3371 .release = seq_release_net,
3374 static int __net_init if6_proc_net_init(struct net *net)
3376 if (!proc_create("if_inet6", S_IRUGO, net->proc_net, &if6_fops))
3381 static void __net_exit if6_proc_net_exit(struct net *net)
3383 remove_proc_entry("if_inet6", net->proc_net);
3386 static struct pernet_operations if6_proc_net_ops = {
3387 .init = if6_proc_net_init,
3388 .exit = if6_proc_net_exit,
3391 int __init if6_proc_init(void)
3393 return register_pernet_subsys(&if6_proc_net_ops);
3396 void if6_proc_exit(void)
3398 unregister_pernet_subsys(&if6_proc_net_ops);
3400 #endif /* CONFIG_PROC_FS */
3402 #if IS_ENABLED(CONFIG_IPV6_MIP6)
3403 /* Check if address is a home address configured on any interface. */
3404 int ipv6_chk_home_addr(struct net *net, const struct in6_addr *addr)
3407 struct inet6_ifaddr *ifp = NULL;
3408 unsigned int hash = inet6_addr_hash(addr);
3411 hlist_for_each_entry_rcu_bh(ifp, &inet6_addr_lst[hash], addr_lst) {
3412 if (!net_eq(dev_net(ifp->idev->dev), net))
3414 if (ipv6_addr_equal(&ifp->addr, addr) &&
3415 (ifp->flags & IFA_F_HOMEADDRESS)) {
3420 rcu_read_unlock_bh();
3426 * Periodic address status verification
3429 static void addrconf_verify(unsigned long foo)
3431 unsigned long now, next, next_sec, next_sched;
3432 struct inet6_ifaddr *ifp;
3436 spin_lock(&addrconf_verify_lock);
3438 next = round_jiffies_up(now + ADDR_CHECK_FREQUENCY);
3440 del_timer(&addr_chk_timer);
3442 for (i = 0; i < IN6_ADDR_HSIZE; i++) {
3444 hlist_for_each_entry_rcu_bh(ifp,
3445 &inet6_addr_lst[i], addr_lst) {
3448 if (ifp->flags & IFA_F_PERMANENT)
3451 spin_lock(&ifp->lock);
3452 /* We try to batch several events at once. */
3453 age = (now - ifp->tstamp + ADDRCONF_TIMER_FUZZ_MINUS) / HZ;
3455 if (ifp->valid_lft != INFINITY_LIFE_TIME &&
3456 age >= ifp->valid_lft) {
3457 spin_unlock(&ifp->lock);
3461 } else if (ifp->prefered_lft == INFINITY_LIFE_TIME) {
3462 spin_unlock(&ifp->lock);
3464 } else if (age >= ifp->prefered_lft) {
3465 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
3468 if (!(ifp->flags&IFA_F_DEPRECATED)) {
3470 ifp->flags |= IFA_F_DEPRECATED;
3473 if (time_before(ifp->tstamp + ifp->valid_lft * HZ, next))
3474 next = ifp->tstamp + ifp->valid_lft * HZ;
3476 spin_unlock(&ifp->lock);
3481 ipv6_ifa_notify(0, ifp);
3485 } else if ((ifp->flags&IFA_F_TEMPORARY) &&
3486 !(ifp->flags&IFA_F_TENTATIVE)) {
3487 unsigned long regen_advance = ifp->idev->cnf.regen_max_retry *
3488 ifp->idev->cnf.dad_transmits *
3489 ifp->idev->nd_parms->retrans_time / HZ;
3491 if (age >= ifp->prefered_lft - regen_advance) {
3492 struct inet6_ifaddr *ifpub = ifp->ifpub;
3493 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3494 next = ifp->tstamp + ifp->prefered_lft * HZ;
3495 if (!ifp->regen_count && ifpub) {
3498 in6_ifa_hold(ifpub);
3499 spin_unlock(&ifp->lock);
3501 spin_lock(&ifpub->lock);
3502 ifpub->regen_count = 0;
3503 spin_unlock(&ifpub->lock);
3504 ipv6_create_tempaddr(ifpub, ifp);
3509 } else if (time_before(ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ, next))
3510 next = ifp->tstamp + ifp->prefered_lft * HZ - regen_advance * HZ;
3511 spin_unlock(&ifp->lock);
3513 /* ifp->prefered_lft <= ifp->valid_lft */
3514 if (time_before(ifp->tstamp + ifp->prefered_lft * HZ, next))
3515 next = ifp->tstamp + ifp->prefered_lft * HZ;
3516 spin_unlock(&ifp->lock);
3521 next_sec = round_jiffies_up(next);
3524 /* If rounded timeout is accurate enough, accept it. */
3525 if (time_before(next_sec, next + ADDRCONF_TIMER_FUZZ))
3526 next_sched = next_sec;
3528 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
3529 if (time_before(next_sched, jiffies + ADDRCONF_TIMER_FUZZ_MAX))
3530 next_sched = jiffies + ADDRCONF_TIMER_FUZZ_MAX;
3532 ADBG(KERN_DEBUG "now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
3533 now, next, next_sec, next_sched);
3535 addr_chk_timer.expires = next_sched;
3536 add_timer(&addr_chk_timer);
3537 spin_unlock(&addrconf_verify_lock);
3538 rcu_read_unlock_bh();
3541 static struct in6_addr *extract_addr(struct nlattr *addr, struct nlattr *local,
3542 struct in6_addr **peer_pfx)
3544 struct in6_addr *pfx = NULL;
3549 pfx = nla_data(addr);
3552 if (pfx && nla_memcmp(local, pfx, sizeof(*pfx)))
3554 pfx = nla_data(local);
3560 static const struct nla_policy ifa_ipv6_policy[IFA_MAX+1] = {
3561 [IFA_ADDRESS] = { .len = sizeof(struct in6_addr) },
3562 [IFA_LOCAL] = { .len = sizeof(struct in6_addr) },
3563 [IFA_CACHEINFO] = { .len = sizeof(struct ifa_cacheinfo) },
3567 inet6_rtm_deladdr(struct sk_buff *skb, struct nlmsghdr *nlh)
3569 struct net *net = sock_net(skb->sk);
3570 struct ifaddrmsg *ifm;
3571 struct nlattr *tb[IFA_MAX+1];
3572 struct in6_addr *pfx, *peer_pfx;
3575 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3579 ifm = nlmsg_data(nlh);
3580 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx);
3584 return inet6_addr_del(net, ifm->ifa_index, pfx, ifm->ifa_prefixlen);
3587 static int inet6_addr_modify(struct inet6_ifaddr *ifp, u8 ifa_flags,
3588 u32 prefered_lft, u32 valid_lft)
3592 unsigned long timeout;
3594 if (!valid_lft || (prefered_lft > valid_lft))
3597 timeout = addrconf_timeout_fixup(valid_lft, HZ);
3598 if (addrconf_finite_timeout(timeout)) {
3599 expires = jiffies_to_clock_t(timeout * HZ);
3600 valid_lft = timeout;
3601 flags = RTF_EXPIRES;
3605 ifa_flags |= IFA_F_PERMANENT;
3608 timeout = addrconf_timeout_fixup(prefered_lft, HZ);
3609 if (addrconf_finite_timeout(timeout)) {
3611 ifa_flags |= IFA_F_DEPRECATED;
3612 prefered_lft = timeout;
3615 spin_lock_bh(&ifp->lock);
3616 ifp->flags = (ifp->flags & ~(IFA_F_DEPRECATED | IFA_F_PERMANENT | IFA_F_NODAD | IFA_F_HOMEADDRESS)) | ifa_flags;
3617 ifp->tstamp = jiffies;
3618 ifp->valid_lft = valid_lft;
3619 ifp->prefered_lft = prefered_lft;
3621 spin_unlock_bh(&ifp->lock);
3622 if (!(ifp->flags&IFA_F_TENTATIVE))
3623 ipv6_ifa_notify(0, ifp);
3625 addrconf_prefix_route(&ifp->addr, ifp->prefix_len, ifp->idev->dev,
3633 inet6_rtm_newaddr(struct sk_buff *skb, struct nlmsghdr *nlh)
3635 struct net *net = sock_net(skb->sk);
3636 struct ifaddrmsg *ifm;
3637 struct nlattr *tb[IFA_MAX+1];
3638 struct in6_addr *pfx, *peer_pfx;
3639 struct inet6_ifaddr *ifa;
3640 struct net_device *dev;
3641 u32 valid_lft = INFINITY_LIFE_TIME, preferred_lft = INFINITY_LIFE_TIME;
3645 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3649 ifm = nlmsg_data(nlh);
3650 pfx = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer_pfx);
3654 if (tb[IFA_CACHEINFO]) {
3655 struct ifa_cacheinfo *ci;
3657 ci = nla_data(tb[IFA_CACHEINFO]);
3658 valid_lft = ci->ifa_valid;
3659 preferred_lft = ci->ifa_prefered;
3661 preferred_lft = INFINITY_LIFE_TIME;
3662 valid_lft = INFINITY_LIFE_TIME;
3665 dev = __dev_get_by_index(net, ifm->ifa_index);
3669 /* We ignore other flags so far. */
3670 ifa_flags = ifm->ifa_flags & (IFA_F_NODAD | IFA_F_HOMEADDRESS);
3672 ifa = ipv6_get_ifaddr(net, pfx, dev, 1);
3675 * It would be best to check for !NLM_F_CREATE here but
3676 * userspace alreay relies on not having to provide this.
3678 return inet6_addr_add(net, ifm->ifa_index, pfx, peer_pfx,
3679 ifm->ifa_prefixlen, ifa_flags,
3680 preferred_lft, valid_lft);
3683 if (nlh->nlmsg_flags & NLM_F_EXCL ||
3684 !(nlh->nlmsg_flags & NLM_F_REPLACE))
3687 err = inet6_addr_modify(ifa, ifa_flags, preferred_lft, valid_lft);
3694 static void put_ifaddrmsg(struct nlmsghdr *nlh, u8 prefixlen, u8 flags,
3695 u8 scope, int ifindex)
3697 struct ifaddrmsg *ifm;
3699 ifm = nlmsg_data(nlh);
3700 ifm->ifa_family = AF_INET6;
3701 ifm->ifa_prefixlen = prefixlen;
3702 ifm->ifa_flags = flags;
3703 ifm->ifa_scope = scope;
3704 ifm->ifa_index = ifindex;
3707 static int put_cacheinfo(struct sk_buff *skb, unsigned long cstamp,
3708 unsigned long tstamp, u32 preferred, u32 valid)
3710 struct ifa_cacheinfo ci;
3712 ci.cstamp = cstamp_delta(cstamp);
3713 ci.tstamp = cstamp_delta(tstamp);
3714 ci.ifa_prefered = preferred;
3715 ci.ifa_valid = valid;
3717 return nla_put(skb, IFA_CACHEINFO, sizeof(ci), &ci);
3720 static inline int rt_scope(int ifa_scope)
3722 if (ifa_scope & IFA_HOST)
3723 return RT_SCOPE_HOST;
3724 else if (ifa_scope & IFA_LINK)
3725 return RT_SCOPE_LINK;
3726 else if (ifa_scope & IFA_SITE)
3727 return RT_SCOPE_SITE;
3729 return RT_SCOPE_UNIVERSE;
3732 static inline int inet6_ifaddr_msgsize(void)
3734 return NLMSG_ALIGN(sizeof(struct ifaddrmsg))
3735 + nla_total_size(16) /* IFA_LOCAL */
3736 + nla_total_size(16) /* IFA_ADDRESS */
3737 + nla_total_size(sizeof(struct ifa_cacheinfo));
3740 static int inet6_fill_ifaddr(struct sk_buff *skb, struct inet6_ifaddr *ifa,
3741 u32 portid, u32 seq, int event, unsigned int flags)
3743 struct nlmsghdr *nlh;
3744 u32 preferred, valid;
3746 nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags);
3750 put_ifaddrmsg(nlh, ifa->prefix_len, ifa->flags, rt_scope(ifa->scope),
3751 ifa->idev->dev->ifindex);
3753 if (!(ifa->flags&IFA_F_PERMANENT)) {
3754 preferred = ifa->prefered_lft;
3755 valid = ifa->valid_lft;
3756 if (preferred != INFINITY_LIFE_TIME) {
3757 long tval = (jiffies - ifa->tstamp)/HZ;
3758 if (preferred > tval)
3762 if (valid != INFINITY_LIFE_TIME) {
3770 preferred = INFINITY_LIFE_TIME;
3771 valid = INFINITY_LIFE_TIME;
3774 if (!ipv6_addr_any(&ifa->peer_addr)) {
3775 if (nla_put(skb, IFA_LOCAL, 16, &ifa->addr) < 0 ||
3776 nla_put(skb, IFA_ADDRESS, 16, &ifa->peer_addr) < 0)
3779 if (nla_put(skb, IFA_ADDRESS, 16, &ifa->addr) < 0)
3782 if (put_cacheinfo(skb, ifa->cstamp, ifa->tstamp, preferred, valid) < 0)
3785 return nlmsg_end(skb, nlh);
3788 nlmsg_cancel(skb, nlh);
3792 static int inet6_fill_ifmcaddr(struct sk_buff *skb, struct ifmcaddr6 *ifmca,
3793 u32 portid, u32 seq, int event, u16 flags)
3795 struct nlmsghdr *nlh;
3796 u8 scope = RT_SCOPE_UNIVERSE;
3797 int ifindex = ifmca->idev->dev->ifindex;
3799 if (ipv6_addr_scope(&ifmca->mca_addr) & IFA_SITE)
3800 scope = RT_SCOPE_SITE;
3802 nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags);
3806 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3807 if (nla_put(skb, IFA_MULTICAST, 16, &ifmca->mca_addr) < 0 ||
3808 put_cacheinfo(skb, ifmca->mca_cstamp, ifmca->mca_tstamp,
3809 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3810 nlmsg_cancel(skb, nlh);
3814 return nlmsg_end(skb, nlh);
3817 static int inet6_fill_ifacaddr(struct sk_buff *skb, struct ifacaddr6 *ifaca,
3818 u32 portid, u32 seq, int event, unsigned int flags)
3820 struct nlmsghdr *nlh;
3821 u8 scope = RT_SCOPE_UNIVERSE;
3822 int ifindex = ifaca->aca_idev->dev->ifindex;
3824 if (ipv6_addr_scope(&ifaca->aca_addr) & IFA_SITE)
3825 scope = RT_SCOPE_SITE;
3827 nlh = nlmsg_put(skb, portid, seq, event, sizeof(struct ifaddrmsg), flags);
3831 put_ifaddrmsg(nlh, 128, IFA_F_PERMANENT, scope, ifindex);
3832 if (nla_put(skb, IFA_ANYCAST, 16, &ifaca->aca_addr) < 0 ||
3833 put_cacheinfo(skb, ifaca->aca_cstamp, ifaca->aca_tstamp,
3834 INFINITY_LIFE_TIME, INFINITY_LIFE_TIME) < 0) {
3835 nlmsg_cancel(skb, nlh);
3839 return nlmsg_end(skb, nlh);
3848 /* called with rcu_read_lock() */
3849 static int in6_dump_addrs(struct inet6_dev *idev, struct sk_buff *skb,
3850 struct netlink_callback *cb, enum addr_type_t type,
3851 int s_ip_idx, int *p_ip_idx)
3853 struct ifmcaddr6 *ifmca;
3854 struct ifacaddr6 *ifaca;
3856 int ip_idx = *p_ip_idx;
3858 read_lock_bh(&idev->lock);
3860 case UNICAST_ADDR: {
3861 struct inet6_ifaddr *ifa;
3863 /* unicast address incl. temp addr */
3864 list_for_each_entry(ifa, &idev->addr_list, if_list) {
3865 if (++ip_idx < s_ip_idx)
3867 err = inet6_fill_ifaddr(skb, ifa,
3868 NETLINK_CB(cb->skb).portid,
3874 nl_dump_check_consistent(cb, nlmsg_hdr(skb));
3878 case MULTICAST_ADDR:
3879 /* multicast address */
3880 for (ifmca = idev->mc_list; ifmca;
3881 ifmca = ifmca->next, ip_idx++) {
3882 if (ip_idx < s_ip_idx)
3884 err = inet6_fill_ifmcaddr(skb, ifmca,
3885 NETLINK_CB(cb->skb).portid,
3894 /* anycast address */
3895 for (ifaca = idev->ac_list; ifaca;
3896 ifaca = ifaca->aca_next, ip_idx++) {
3897 if (ip_idx < s_ip_idx)
3899 err = inet6_fill_ifacaddr(skb, ifaca,
3900 NETLINK_CB(cb->skb).portid,
3911 read_unlock_bh(&idev->lock);
3916 static int inet6_dump_addr(struct sk_buff *skb, struct netlink_callback *cb,
3917 enum addr_type_t type)
3919 struct net *net = sock_net(skb->sk);
3922 int s_idx, s_ip_idx;
3923 struct net_device *dev;
3924 struct inet6_dev *idev;
3925 struct hlist_head *head;
3928 s_idx = idx = cb->args[1];
3929 s_ip_idx = ip_idx = cb->args[2];
3932 cb->seq = atomic_read(&net->ipv6.dev_addr_genid) ^ net->dev_base_seq;
3933 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
3935 head = &net->dev_index_head[h];
3936 hlist_for_each_entry_rcu(dev, head, index_hlist) {
3939 if (h > s_h || idx > s_idx)
3942 idev = __in6_dev_get(dev);
3946 if (in6_dump_addrs(idev, skb, cb, type,
3947 s_ip_idx, &ip_idx) <= 0)
3957 cb->args[2] = ip_idx;
3962 static int inet6_dump_ifaddr(struct sk_buff *skb, struct netlink_callback *cb)
3964 enum addr_type_t type = UNICAST_ADDR;
3966 return inet6_dump_addr(skb, cb, type);
3969 static int inet6_dump_ifmcaddr(struct sk_buff *skb, struct netlink_callback *cb)
3971 enum addr_type_t type = MULTICAST_ADDR;
3973 return inet6_dump_addr(skb, cb, type);
3977 static int inet6_dump_ifacaddr(struct sk_buff *skb, struct netlink_callback *cb)
3979 enum addr_type_t type = ANYCAST_ADDR;
3981 return inet6_dump_addr(skb, cb, type);
3984 static int inet6_rtm_getaddr(struct sk_buff *in_skb, struct nlmsghdr *nlh)
3986 struct net *net = sock_net(in_skb->sk);
3987 struct ifaddrmsg *ifm;
3988 struct nlattr *tb[IFA_MAX+1];
3989 struct in6_addr *addr = NULL, *peer;
3990 struct net_device *dev = NULL;
3991 struct inet6_ifaddr *ifa;
3992 struct sk_buff *skb;
3995 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFA_MAX, ifa_ipv6_policy);
3999 addr = extract_addr(tb[IFA_ADDRESS], tb[IFA_LOCAL], &peer);
4005 ifm = nlmsg_data(nlh);
4007 dev = __dev_get_by_index(net, ifm->ifa_index);
4009 ifa = ipv6_get_ifaddr(net, addr, dev, 1);
4011 err = -EADDRNOTAVAIL;
4015 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL);
4021 err = inet6_fill_ifaddr(skb, ifa, NETLINK_CB(in_skb).portid,
4022 nlh->nlmsg_seq, RTM_NEWADDR, 0);
4024 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4025 WARN_ON(err == -EMSGSIZE);
4029 err = rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid);
4036 static void inet6_ifa_notify(int event, struct inet6_ifaddr *ifa)
4038 struct sk_buff *skb;
4039 struct net *net = dev_net(ifa->idev->dev);
4042 skb = nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC);
4046 err = inet6_fill_ifaddr(skb, ifa, 0, 0, event, 0);
4048 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4049 WARN_ON(err == -EMSGSIZE);
4053 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFADDR, NULL, GFP_ATOMIC);
4057 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFADDR, err);
4060 static inline void ipv6_store_devconf(struct ipv6_devconf *cnf,
4061 __s32 *array, int bytes)
4063 BUG_ON(bytes < (DEVCONF_MAX * 4));
4065 memset(array, 0, bytes);
4066 array[DEVCONF_FORWARDING] = cnf->forwarding;
4067 array[DEVCONF_HOPLIMIT] = cnf->hop_limit;
4068 array[DEVCONF_MTU6] = cnf->mtu6;
4069 array[DEVCONF_ACCEPT_RA] = cnf->accept_ra;
4070 array[DEVCONF_ACCEPT_REDIRECTS] = cnf->accept_redirects;
4071 array[DEVCONF_AUTOCONF] = cnf->autoconf;
4072 array[DEVCONF_DAD_TRANSMITS] = cnf->dad_transmits;
4073 array[DEVCONF_RTR_SOLICITS] = cnf->rtr_solicits;
4074 array[DEVCONF_RTR_SOLICIT_INTERVAL] =
4075 jiffies_to_msecs(cnf->rtr_solicit_interval);
4076 array[DEVCONF_RTR_SOLICIT_DELAY] =
4077 jiffies_to_msecs(cnf->rtr_solicit_delay);
4078 array[DEVCONF_FORCE_MLD_VERSION] = cnf->force_mld_version;
4079 array[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL] =
4080 jiffies_to_msecs(cnf->mldv1_unsolicited_report_interval);
4081 array[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL] =
4082 jiffies_to_msecs(cnf->mldv2_unsolicited_report_interval);
4083 array[DEVCONF_USE_TEMPADDR] = cnf->use_tempaddr;
4084 array[DEVCONF_TEMP_VALID_LFT] = cnf->temp_valid_lft;
4085 array[DEVCONF_TEMP_PREFERED_LFT] = cnf->temp_prefered_lft;
4086 array[DEVCONF_REGEN_MAX_RETRY] = cnf->regen_max_retry;
4087 array[DEVCONF_MAX_DESYNC_FACTOR] = cnf->max_desync_factor;
4088 array[DEVCONF_MAX_ADDRESSES] = cnf->max_addresses;
4089 array[DEVCONF_ACCEPT_RA_DEFRTR] = cnf->accept_ra_defrtr;
4090 array[DEVCONF_ACCEPT_RA_PINFO] = cnf->accept_ra_pinfo;
4091 #ifdef CONFIG_IPV6_ROUTER_PREF
4092 array[DEVCONF_ACCEPT_RA_RTR_PREF] = cnf->accept_ra_rtr_pref;
4093 array[DEVCONF_RTR_PROBE_INTERVAL] =
4094 jiffies_to_msecs(cnf->rtr_probe_interval);
4095 #ifdef CONFIG_IPV6_ROUTE_INFO
4096 array[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN] = cnf->accept_ra_rt_info_max_plen;
4099 array[DEVCONF_PROXY_NDP] = cnf->proxy_ndp;
4100 array[DEVCONF_ACCEPT_SOURCE_ROUTE] = cnf->accept_source_route;
4101 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4102 array[DEVCONF_OPTIMISTIC_DAD] = cnf->optimistic_dad;
4104 #ifdef CONFIG_IPV6_MROUTE
4105 array[DEVCONF_MC_FORWARDING] = cnf->mc_forwarding;
4107 array[DEVCONF_DISABLE_IPV6] = cnf->disable_ipv6;
4108 array[DEVCONF_ACCEPT_DAD] = cnf->accept_dad;
4109 array[DEVCONF_FORCE_TLLAO] = cnf->force_tllao;
4110 array[DEVCONF_NDISC_NOTIFY] = cnf->ndisc_notify;
4111 array[DEVCONF_SUPPRESS_FRAG_NDISC] = cnf->suppress_frag_ndisc;
4114 static inline size_t inet6_ifla6_size(void)
4116 return nla_total_size(4) /* IFLA_INET6_FLAGS */
4117 + nla_total_size(sizeof(struct ifla_cacheinfo))
4118 + nla_total_size(DEVCONF_MAX * 4) /* IFLA_INET6_CONF */
4119 + nla_total_size(IPSTATS_MIB_MAX * 8) /* IFLA_INET6_STATS */
4120 + nla_total_size(ICMP6_MIB_MAX * 8) /* IFLA_INET6_ICMP6STATS */
4121 + nla_total_size(sizeof(struct in6_addr)); /* IFLA_INET6_TOKEN */
4124 static inline size_t inet6_if_nlmsg_size(void)
4126 return NLMSG_ALIGN(sizeof(struct ifinfomsg))
4127 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */
4128 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */
4129 + nla_total_size(4) /* IFLA_MTU */
4130 + nla_total_size(4) /* IFLA_LINK */
4131 + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
4134 static inline void __snmp6_fill_statsdev(u64 *stats, atomic_long_t *mib,
4135 int items, int bytes)
4138 int pad = bytes - sizeof(u64) * items;
4141 /* Use put_unaligned() because stats may not be aligned for u64. */
4142 put_unaligned(items, &stats[0]);
4143 for (i = 1; i < items; i++)
4144 put_unaligned(atomic_long_read(&mib[i]), &stats[i]);
4146 memset(&stats[items], 0, pad);
4149 static inline void __snmp6_fill_stats64(u64 *stats, void __percpu **mib,
4150 int items, int bytes, size_t syncpoff)
4153 int pad = bytes - sizeof(u64) * items;
4156 /* Use put_unaligned() because stats may not be aligned for u64. */
4157 put_unaligned(items, &stats[0]);
4158 for (i = 1; i < items; i++)
4159 put_unaligned(snmp_fold_field64(mib, i, syncpoff), &stats[i]);
4161 memset(&stats[items], 0, pad);
4164 static void snmp6_fill_stats(u64 *stats, struct inet6_dev *idev, int attrtype,
4168 case IFLA_INET6_STATS:
4169 __snmp6_fill_stats64(stats, (void __percpu **)idev->stats.ipv6,
4170 IPSTATS_MIB_MAX, bytes, offsetof(struct ipstats_mib, syncp));
4172 case IFLA_INET6_ICMP6STATS:
4173 __snmp6_fill_statsdev(stats, idev->stats.icmpv6dev->mibs, ICMP6_MIB_MAX, bytes);
4178 static int inet6_fill_ifla6_attrs(struct sk_buff *skb, struct inet6_dev *idev)
4181 struct ifla_cacheinfo ci;
4183 if (nla_put_u32(skb, IFLA_INET6_FLAGS, idev->if_flags))
4184 goto nla_put_failure;
4185 ci.max_reasm_len = IPV6_MAXPLEN;
4186 ci.tstamp = cstamp_delta(idev->tstamp);
4187 ci.reachable_time = jiffies_to_msecs(idev->nd_parms->reachable_time);
4188 ci.retrans_time = jiffies_to_msecs(idev->nd_parms->retrans_time);
4189 if (nla_put(skb, IFLA_INET6_CACHEINFO, sizeof(ci), &ci))
4190 goto nla_put_failure;
4191 nla = nla_reserve(skb, IFLA_INET6_CONF, DEVCONF_MAX * sizeof(s32));
4193 goto nla_put_failure;
4194 ipv6_store_devconf(&idev->cnf, nla_data(nla), nla_len(nla));
4196 /* XXX - MC not implemented */
4198 nla = nla_reserve(skb, IFLA_INET6_STATS, IPSTATS_MIB_MAX * sizeof(u64));
4200 goto nla_put_failure;
4201 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_STATS, nla_len(nla));
4203 nla = nla_reserve(skb, IFLA_INET6_ICMP6STATS, ICMP6_MIB_MAX * sizeof(u64));
4205 goto nla_put_failure;
4206 snmp6_fill_stats(nla_data(nla), idev, IFLA_INET6_ICMP6STATS, nla_len(nla));
4208 nla = nla_reserve(skb, IFLA_INET6_TOKEN, sizeof(struct in6_addr));
4210 goto nla_put_failure;
4211 read_lock_bh(&idev->lock);
4212 memcpy(nla_data(nla), idev->token.s6_addr, nla_len(nla));
4213 read_unlock_bh(&idev->lock);
4221 static size_t inet6_get_link_af_size(const struct net_device *dev)
4223 if (!__in6_dev_get(dev))
4226 return inet6_ifla6_size();
4229 static int inet6_fill_link_af(struct sk_buff *skb, const struct net_device *dev)
4231 struct inet6_dev *idev = __in6_dev_get(dev);
4236 if (inet6_fill_ifla6_attrs(skb, idev) < 0)
4242 static int inet6_set_iftoken(struct inet6_dev *idev, struct in6_addr *token)
4244 struct inet6_ifaddr *ifp;
4245 struct net_device *dev = idev->dev;
4246 bool update_rs = false;
4247 struct in6_addr ll_addr;
4251 if (ipv6_addr_any(token))
4253 if (dev->flags & (IFF_LOOPBACK | IFF_NOARP))
4255 if (!ipv6_accept_ra(idev))
4257 if (idev->cnf.rtr_solicits <= 0)
4260 write_lock_bh(&idev->lock);
4262 BUILD_BUG_ON(sizeof(token->s6_addr) != 16);
4263 memcpy(idev->token.s6_addr + 8, token->s6_addr + 8, 8);
4265 write_unlock_bh(&idev->lock);
4267 if (!idev->dead && (idev->if_flags & IF_READY) &&
4268 !ipv6_get_lladdr(dev, &ll_addr, IFA_F_TENTATIVE |
4269 IFA_F_OPTIMISTIC)) {
4271 /* If we're not ready, then normal ifup will take care
4272 * of this. Otherwise, we need to request our rs here.
4274 ndisc_send_rs(dev, &ll_addr, &in6addr_linklocal_allrouters);
4278 write_lock_bh(&idev->lock);
4281 idev->if_flags |= IF_RS_SENT;
4282 idev->rs_probes = 1;
4283 addrconf_mod_rs_timer(idev, idev->cnf.rtr_solicit_interval);
4286 /* Well, that's kinda nasty ... */
4287 list_for_each_entry(ifp, &idev->addr_list, if_list) {
4288 spin_lock(&ifp->lock);
4289 if (ifp->tokenized) {
4291 ifp->prefered_lft = 0;
4293 spin_unlock(&ifp->lock);
4296 write_unlock_bh(&idev->lock);
4301 static int inet6_set_link_af(struct net_device *dev, const struct nlattr *nla)
4304 struct inet6_dev *idev = __in6_dev_get(dev);
4305 struct nlattr *tb[IFLA_INET6_MAX + 1];
4308 return -EAFNOSUPPORT;
4310 if (nla_parse_nested(tb, IFLA_INET6_MAX, nla, NULL) < 0)
4313 if (tb[IFLA_INET6_TOKEN])
4314 err = inet6_set_iftoken(idev, nla_data(tb[IFLA_INET6_TOKEN]));
4319 static int inet6_fill_ifinfo(struct sk_buff *skb, struct inet6_dev *idev,
4320 u32 portid, u32 seq, int event, unsigned int flags)
4322 struct net_device *dev = idev->dev;
4323 struct ifinfomsg *hdr;
4324 struct nlmsghdr *nlh;
4327 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*hdr), flags);
4331 hdr = nlmsg_data(nlh);
4332 hdr->ifi_family = AF_INET6;
4334 hdr->ifi_type = dev->type;
4335 hdr->ifi_index = dev->ifindex;
4336 hdr->ifi_flags = dev_get_flags(dev);
4337 hdr->ifi_change = 0;
4339 if (nla_put_string(skb, IFLA_IFNAME, dev->name) ||
4341 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) ||
4342 nla_put_u32(skb, IFLA_MTU, dev->mtu) ||
4343 (dev->ifindex != dev->iflink &&
4344 nla_put_u32(skb, IFLA_LINK, dev->iflink)))
4345 goto nla_put_failure;
4346 protoinfo = nla_nest_start(skb, IFLA_PROTINFO);
4347 if (protoinfo == NULL)
4348 goto nla_put_failure;
4350 if (inet6_fill_ifla6_attrs(skb, idev) < 0)
4351 goto nla_put_failure;
4353 nla_nest_end(skb, protoinfo);
4354 return nlmsg_end(skb, nlh);
4357 nlmsg_cancel(skb, nlh);
4361 static int inet6_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb)
4363 struct net *net = sock_net(skb->sk);
4366 struct net_device *dev;
4367 struct inet6_dev *idev;
4368 struct hlist_head *head;
4371 s_idx = cb->args[1];
4374 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) {
4376 head = &net->dev_index_head[h];
4377 hlist_for_each_entry_rcu(dev, head, index_hlist) {
4380 idev = __in6_dev_get(dev);
4383 if (inet6_fill_ifinfo(skb, idev,
4384 NETLINK_CB(cb->skb).portid,
4386 RTM_NEWLINK, NLM_F_MULTI) <= 0)
4400 void inet6_ifinfo_notify(int event, struct inet6_dev *idev)
4402 struct sk_buff *skb;
4403 struct net *net = dev_net(idev->dev);
4406 skb = nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC);
4410 err = inet6_fill_ifinfo(skb, idev, 0, 0, event, 0);
4412 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
4413 WARN_ON(err == -EMSGSIZE);
4417 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_IFINFO, NULL, GFP_ATOMIC);
4421 rtnl_set_sk_err(net, RTNLGRP_IPV6_IFINFO, err);
4424 static inline size_t inet6_prefix_nlmsg_size(void)
4426 return NLMSG_ALIGN(sizeof(struct prefixmsg))
4427 + nla_total_size(sizeof(struct in6_addr))
4428 + nla_total_size(sizeof(struct prefix_cacheinfo));
4431 static int inet6_fill_prefix(struct sk_buff *skb, struct inet6_dev *idev,
4432 struct prefix_info *pinfo, u32 portid, u32 seq,
4433 int event, unsigned int flags)
4435 struct prefixmsg *pmsg;
4436 struct nlmsghdr *nlh;
4437 struct prefix_cacheinfo ci;
4439 nlh = nlmsg_put(skb, portid, seq, event, sizeof(*pmsg), flags);
4443 pmsg = nlmsg_data(nlh);
4444 pmsg->prefix_family = AF_INET6;
4445 pmsg->prefix_pad1 = 0;
4446 pmsg->prefix_pad2 = 0;
4447 pmsg->prefix_ifindex = idev->dev->ifindex;
4448 pmsg->prefix_len = pinfo->prefix_len;
4449 pmsg->prefix_type = pinfo->type;
4450 pmsg->prefix_pad3 = 0;
4451 pmsg->prefix_flags = 0;
4453 pmsg->prefix_flags |= IF_PREFIX_ONLINK;
4454 if (pinfo->autoconf)
4455 pmsg->prefix_flags |= IF_PREFIX_AUTOCONF;
4457 if (nla_put(skb, PREFIX_ADDRESS, sizeof(pinfo->prefix), &pinfo->prefix))
4458 goto nla_put_failure;
4459 ci.preferred_time = ntohl(pinfo->prefered);
4460 ci.valid_time = ntohl(pinfo->valid);
4461 if (nla_put(skb, PREFIX_CACHEINFO, sizeof(ci), &ci))
4462 goto nla_put_failure;
4463 return nlmsg_end(skb, nlh);
4466 nlmsg_cancel(skb, nlh);
4470 static void inet6_prefix_notify(int event, struct inet6_dev *idev,
4471 struct prefix_info *pinfo)
4473 struct sk_buff *skb;
4474 struct net *net = dev_net(idev->dev);
4477 skb = nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC);
4481 err = inet6_fill_prefix(skb, idev, pinfo, 0, 0, event, 0);
4483 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
4484 WARN_ON(err == -EMSGSIZE);
4488 rtnl_notify(skb, net, 0, RTNLGRP_IPV6_PREFIX, NULL, GFP_ATOMIC);
4492 rtnl_set_sk_err(net, RTNLGRP_IPV6_PREFIX, err);
4495 static void update_valid_ll_addr_cnt(struct inet6_ifaddr *ifp, int count)
4497 write_lock_bh(&ifp->idev->lock);
4498 spin_lock(&ifp->lock);
4499 if (((ifp->flags & (IFA_F_PERMANENT|IFA_F_TENTATIVE|IFA_F_OPTIMISTIC|
4500 IFA_F_DADFAILED)) == IFA_F_PERMANENT) &&
4501 (ipv6_addr_type(&ifp->addr) & IPV6_ADDR_LINKLOCAL))
4502 ifp->idev->valid_ll_addr_cnt += count;
4503 WARN_ON(ifp->idev->valid_ll_addr_cnt < 0);
4504 spin_unlock(&ifp->lock);
4505 write_unlock_bh(&ifp->idev->lock);
4508 static void __ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
4510 struct net *net = dev_net(ifp->idev->dev);
4512 inet6_ifa_notify(event ? : RTM_NEWADDR, ifp);
4516 update_valid_ll_addr_cnt(ifp, 1);
4519 * If the address was optimistic
4520 * we inserted the route at the start of
4521 * our DAD process, so we don't need
4524 if (!(ifp->rt->rt6i_node))
4525 ip6_ins_rt(ifp->rt);
4526 if (ifp->idev->cnf.forwarding)
4527 addrconf_join_anycast(ifp);
4528 if (!ipv6_addr_any(&ifp->peer_addr))
4529 addrconf_prefix_route(&ifp->peer_addr, 128,
4530 ifp->idev->dev, 0, 0);
4533 update_valid_ll_addr_cnt(ifp, -1);
4535 if (ifp->idev->cnf.forwarding)
4536 addrconf_leave_anycast(ifp);
4537 addrconf_leave_solict(ifp->idev, &ifp->addr);
4538 if (!ipv6_addr_any(&ifp->peer_addr)) {
4539 struct rt6_info *rt;
4540 struct net_device *dev = ifp->idev->dev;
4542 rt = rt6_lookup(dev_net(dev), &ifp->peer_addr, NULL,
4550 dst_hold(&ifp->rt->dst);
4552 if (ip6_del_rt(ifp->rt))
4553 dst_free(&ifp->rt->dst);
4556 atomic_inc(&net->ipv6.dev_addr_genid);
4557 rt_genid_bump_ipv6(net);
4560 static void ipv6_ifa_notify(int event, struct inet6_ifaddr *ifp)
4563 if (likely(ifp->idev->dead == 0))
4564 __ipv6_ifa_notify(event, ifp);
4565 rcu_read_unlock_bh();
4568 #ifdef CONFIG_SYSCTL
4571 int addrconf_sysctl_forward(struct ctl_table *ctl, int write,
4572 void __user *buffer, size_t *lenp, loff_t *ppos)
4574 int *valp = ctl->data;
4577 struct ctl_table lctl;
4581 * ctl->data points to idev->cnf.forwarding, we should
4582 * not modify it until we get the rtnl lock.
4587 ret = proc_dointvec(&lctl, write, buffer, lenp, ppos);
4590 ret = addrconf_fixup_forwarding(ctl, valp, val);
4596 static void dev_disable_change(struct inet6_dev *idev)
4598 struct netdev_notifier_info info;
4600 if (!idev || !idev->dev)
4603 netdev_notifier_info_init(&info, idev->dev);
4604 if (idev->cnf.disable_ipv6)
4605 addrconf_notify(NULL, NETDEV_DOWN, &info);
4607 addrconf_notify(NULL, NETDEV_UP, &info);
4610 static void addrconf_disable_change(struct net *net, __s32 newf)
4612 struct net_device *dev;
4613 struct inet6_dev *idev;
4616 for_each_netdev_rcu(net, dev) {
4617 idev = __in6_dev_get(dev);
4619 int changed = (!idev->cnf.disable_ipv6) ^ (!newf);
4620 idev->cnf.disable_ipv6 = newf;
4622 dev_disable_change(idev);
4628 static int addrconf_disable_ipv6(struct ctl_table *table, int *p, int newf)
4633 if (!rtnl_trylock())
4634 return restart_syscall();
4636 net = (struct net *)table->extra2;
4640 if (p == &net->ipv6.devconf_dflt->disable_ipv6) {
4645 if (p == &net->ipv6.devconf_all->disable_ipv6) {
4646 net->ipv6.devconf_dflt->disable_ipv6 = newf;
4647 addrconf_disable_change(net, newf);
4648 } else if ((!newf) ^ (!old))
4649 dev_disable_change((struct inet6_dev *)table->extra1);
4656 int addrconf_sysctl_disable(struct ctl_table *ctl, int write,
4657 void __user *buffer, size_t *lenp, loff_t *ppos)
4659 int *valp = ctl->data;
4662 struct ctl_table lctl;
4666 * ctl->data points to idev->cnf.disable_ipv6, we should
4667 * not modify it until we get the rtnl lock.
4672 ret = proc_dointvec(&lctl, write, buffer, lenp, ppos);
4675 ret = addrconf_disable_ipv6(ctl, valp, val);
4681 static struct addrconf_sysctl_table
4683 struct ctl_table_header *sysctl_header;
4684 struct ctl_table addrconf_vars[DEVCONF_MAX+1];
4685 } addrconf_sysctl __read_mostly = {
4686 .sysctl_header = NULL,
4689 .procname = "forwarding",
4690 .data = &ipv6_devconf.forwarding,
4691 .maxlen = sizeof(int),
4693 .proc_handler = addrconf_sysctl_forward,
4696 .procname = "hop_limit",
4697 .data = &ipv6_devconf.hop_limit,
4698 .maxlen = sizeof(int),
4700 .proc_handler = proc_dointvec,
4704 .data = &ipv6_devconf.mtu6,
4705 .maxlen = sizeof(int),
4707 .proc_handler = proc_dointvec,
4710 .procname = "accept_ra",
4711 .data = &ipv6_devconf.accept_ra,
4712 .maxlen = sizeof(int),
4714 .proc_handler = proc_dointvec,
4717 .procname = "accept_redirects",
4718 .data = &ipv6_devconf.accept_redirects,
4719 .maxlen = sizeof(int),
4721 .proc_handler = proc_dointvec,
4724 .procname = "autoconf",
4725 .data = &ipv6_devconf.autoconf,
4726 .maxlen = sizeof(int),
4728 .proc_handler = proc_dointvec,
4731 .procname = "dad_transmits",
4732 .data = &ipv6_devconf.dad_transmits,
4733 .maxlen = sizeof(int),
4735 .proc_handler = proc_dointvec,
4738 .procname = "router_solicitations",
4739 .data = &ipv6_devconf.rtr_solicits,
4740 .maxlen = sizeof(int),
4742 .proc_handler = proc_dointvec,
4745 .procname = "router_solicitation_interval",
4746 .data = &ipv6_devconf.rtr_solicit_interval,
4747 .maxlen = sizeof(int),
4749 .proc_handler = proc_dointvec_jiffies,
4752 .procname = "router_solicitation_delay",
4753 .data = &ipv6_devconf.rtr_solicit_delay,
4754 .maxlen = sizeof(int),
4756 .proc_handler = proc_dointvec_jiffies,
4759 .procname = "force_mld_version",
4760 .data = &ipv6_devconf.force_mld_version,
4761 .maxlen = sizeof(int),
4763 .proc_handler = proc_dointvec,
4766 .procname = "mldv1_unsolicited_report_interval",
4768 &ipv6_devconf.mldv1_unsolicited_report_interval,
4769 .maxlen = sizeof(int),
4771 .proc_handler = proc_dointvec_ms_jiffies,
4774 .procname = "mldv2_unsolicited_report_interval",
4776 &ipv6_devconf.mldv2_unsolicited_report_interval,
4777 .maxlen = sizeof(int),
4779 .proc_handler = proc_dointvec_ms_jiffies,
4782 .procname = "use_tempaddr",
4783 .data = &ipv6_devconf.use_tempaddr,
4784 .maxlen = sizeof(int),
4786 .proc_handler = proc_dointvec,
4789 .procname = "temp_valid_lft",
4790 .data = &ipv6_devconf.temp_valid_lft,
4791 .maxlen = sizeof(int),
4793 .proc_handler = proc_dointvec,
4796 .procname = "temp_prefered_lft",
4797 .data = &ipv6_devconf.temp_prefered_lft,
4798 .maxlen = sizeof(int),
4800 .proc_handler = proc_dointvec,
4803 .procname = "regen_max_retry",
4804 .data = &ipv6_devconf.regen_max_retry,
4805 .maxlen = sizeof(int),
4807 .proc_handler = proc_dointvec,
4810 .procname = "max_desync_factor",
4811 .data = &ipv6_devconf.max_desync_factor,
4812 .maxlen = sizeof(int),
4814 .proc_handler = proc_dointvec,
4817 .procname = "max_addresses",
4818 .data = &ipv6_devconf.max_addresses,
4819 .maxlen = sizeof(int),
4821 .proc_handler = proc_dointvec,
4824 .procname = "accept_ra_defrtr",
4825 .data = &ipv6_devconf.accept_ra_defrtr,
4826 .maxlen = sizeof(int),
4828 .proc_handler = proc_dointvec,
4831 .procname = "accept_ra_pinfo",
4832 .data = &ipv6_devconf.accept_ra_pinfo,
4833 .maxlen = sizeof(int),
4835 .proc_handler = proc_dointvec,
4837 #ifdef CONFIG_IPV6_ROUTER_PREF
4839 .procname = "accept_ra_rtr_pref",
4840 .data = &ipv6_devconf.accept_ra_rtr_pref,
4841 .maxlen = sizeof(int),
4843 .proc_handler = proc_dointvec,
4846 .procname = "router_probe_interval",
4847 .data = &ipv6_devconf.rtr_probe_interval,
4848 .maxlen = sizeof(int),
4850 .proc_handler = proc_dointvec_jiffies,
4852 #ifdef CONFIG_IPV6_ROUTE_INFO
4854 .procname = "accept_ra_rt_info_max_plen",
4855 .data = &ipv6_devconf.accept_ra_rt_info_max_plen,
4856 .maxlen = sizeof(int),
4858 .proc_handler = proc_dointvec,
4863 .procname = "proxy_ndp",
4864 .data = &ipv6_devconf.proxy_ndp,
4865 .maxlen = sizeof(int),
4867 .proc_handler = proc_dointvec,
4870 .procname = "accept_source_route",
4871 .data = &ipv6_devconf.accept_source_route,
4872 .maxlen = sizeof(int),
4874 .proc_handler = proc_dointvec,
4876 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4878 .procname = "optimistic_dad",
4879 .data = &ipv6_devconf.optimistic_dad,
4880 .maxlen = sizeof(int),
4882 .proc_handler = proc_dointvec,
4886 #ifdef CONFIG_IPV6_MROUTE
4888 .procname = "mc_forwarding",
4889 .data = &ipv6_devconf.mc_forwarding,
4890 .maxlen = sizeof(int),
4892 .proc_handler = proc_dointvec,
4896 .procname = "disable_ipv6",
4897 .data = &ipv6_devconf.disable_ipv6,
4898 .maxlen = sizeof(int),
4900 .proc_handler = addrconf_sysctl_disable,
4903 .procname = "accept_dad",
4904 .data = &ipv6_devconf.accept_dad,
4905 .maxlen = sizeof(int),
4907 .proc_handler = proc_dointvec,
4910 .procname = "force_tllao",
4911 .data = &ipv6_devconf.force_tllao,
4912 .maxlen = sizeof(int),
4914 .proc_handler = proc_dointvec
4917 .procname = "ndisc_notify",
4918 .data = &ipv6_devconf.ndisc_notify,
4919 .maxlen = sizeof(int),
4921 .proc_handler = proc_dointvec
4924 .procname = "suppress_frag_ndisc",
4925 .data = &ipv6_devconf.suppress_frag_ndisc,
4926 .maxlen = sizeof(int),
4928 .proc_handler = proc_dointvec
4936 static int __addrconf_sysctl_register(struct net *net, char *dev_name,
4937 struct inet6_dev *idev, struct ipv6_devconf *p)
4940 struct addrconf_sysctl_table *t;
4941 char path[sizeof("net/ipv6/conf/") + IFNAMSIZ];
4943 t = kmemdup(&addrconf_sysctl, sizeof(*t), GFP_KERNEL);
4947 for (i = 0; t->addrconf_vars[i].data; i++) {
4948 t->addrconf_vars[i].data += (char *)p - (char *)&ipv6_devconf;
4949 t->addrconf_vars[i].extra1 = idev; /* embedded; no ref */
4950 t->addrconf_vars[i].extra2 = net;
4953 snprintf(path, sizeof(path), "net/ipv6/conf/%s", dev_name);
4955 t->sysctl_header = register_net_sysctl(net, path, t->addrconf_vars);
4956 if (t->sysctl_header == NULL)
4968 static void __addrconf_sysctl_unregister(struct ipv6_devconf *p)
4970 struct addrconf_sysctl_table *t;
4972 if (p->sysctl == NULL)
4977 unregister_net_sysctl_table(t->sysctl_header);
4981 static void addrconf_sysctl_register(struct inet6_dev *idev)
4983 neigh_sysctl_register(idev->dev, idev->nd_parms, "ipv6",
4984 &ndisc_ifinfo_sysctl_change);
4985 __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name,
4989 static void addrconf_sysctl_unregister(struct inet6_dev *idev)
4991 __addrconf_sysctl_unregister(&idev->cnf);
4992 neigh_sysctl_unregister(idev->nd_parms);
4998 static int __net_init addrconf_init_net(struct net *net)
5001 struct ipv6_devconf *all, *dflt;
5003 all = kmemdup(&ipv6_devconf, sizeof(ipv6_devconf), GFP_KERNEL);
5007 dflt = kmemdup(&ipv6_devconf_dflt, sizeof(ipv6_devconf_dflt), GFP_KERNEL);
5009 goto err_alloc_dflt;
5011 /* these will be inherited by all namespaces */
5012 dflt->autoconf = ipv6_defaults.autoconf;
5013 dflt->disable_ipv6 = ipv6_defaults.disable_ipv6;
5015 net->ipv6.devconf_all = all;
5016 net->ipv6.devconf_dflt = dflt;
5018 #ifdef CONFIG_SYSCTL
5019 err = __addrconf_sysctl_register(net, "all", NULL, all);
5023 err = __addrconf_sysctl_register(net, "default", NULL, dflt);
5029 #ifdef CONFIG_SYSCTL
5031 __addrconf_sysctl_unregister(all);
5041 static void __net_exit addrconf_exit_net(struct net *net)
5043 #ifdef CONFIG_SYSCTL
5044 __addrconf_sysctl_unregister(net->ipv6.devconf_dflt);
5045 __addrconf_sysctl_unregister(net->ipv6.devconf_all);
5047 if (!net_eq(net, &init_net)) {
5048 kfree(net->ipv6.devconf_dflt);
5049 kfree(net->ipv6.devconf_all);
5053 static struct pernet_operations addrconf_ops = {
5054 .init = addrconf_init_net,
5055 .exit = addrconf_exit_net,
5058 static struct rtnl_af_ops inet6_ops = {
5060 .fill_link_af = inet6_fill_link_af,
5061 .get_link_af_size = inet6_get_link_af_size,
5062 .set_link_af = inet6_set_link_af,
5066 * Init / cleanup code
5069 int __init addrconf_init(void)
5073 err = ipv6_addr_label_init();
5075 pr_crit("%s: cannot initialize default policy table: %d\n",
5080 err = register_pernet_subsys(&addrconf_ops);
5084 /* The addrconf netdev notifier requires that loopback_dev
5085 * has it's ipv6 private information allocated and setup
5086 * before it can bring up and give link-local addresses
5087 * to other devices which are up.
5089 * Unfortunately, loopback_dev is not necessarily the first
5090 * entry in the global dev_base list of net devices. In fact,
5091 * it is likely to be the very last entry on that list.
5092 * So this causes the notifier registry below to try and
5093 * give link-local addresses to all devices besides loopback_dev
5094 * first, then loopback_dev, which cases all the non-loopback_dev
5095 * devices to fail to get a link-local address.
5097 * So, as a temporary fix, allocate the ipv6 structure for
5098 * loopback_dev first by hand.
5099 * Longer term, all of the dependencies ipv6 has upon the loopback
5100 * device and it being up should be removed.
5103 if (!ipv6_add_dev(init_net.loopback_dev))
5109 for (i = 0; i < IN6_ADDR_HSIZE; i++)
5110 INIT_HLIST_HEAD(&inet6_addr_lst[i]);
5112 register_netdevice_notifier(&ipv6_dev_notf);
5116 err = rtnl_af_register(&inet6_ops);
5120 err = __rtnl_register(PF_INET6, RTM_GETLINK, NULL, inet6_dump_ifinfo,
5125 /* Only the first call to __rtnl_register can fail */
5126 __rtnl_register(PF_INET6, RTM_NEWADDR, inet6_rtm_newaddr, NULL, NULL);
5127 __rtnl_register(PF_INET6, RTM_DELADDR, inet6_rtm_deladdr, NULL, NULL);
5128 __rtnl_register(PF_INET6, RTM_GETADDR, inet6_rtm_getaddr,
5129 inet6_dump_ifaddr, NULL);
5130 __rtnl_register(PF_INET6, RTM_GETMULTICAST, NULL,
5131 inet6_dump_ifmcaddr, NULL);
5132 __rtnl_register(PF_INET6, RTM_GETANYCAST, NULL,
5133 inet6_dump_ifacaddr, NULL);
5134 __rtnl_register(PF_INET6, RTM_GETNETCONF, inet6_netconf_get_devconf,
5135 inet6_netconf_dump_devconf, NULL);
5137 ipv6_addr_label_rtnl_register();
5141 rtnl_af_unregister(&inet6_ops);
5143 unregister_netdevice_notifier(&ipv6_dev_notf);
5145 unregister_pernet_subsys(&addrconf_ops);
5147 ipv6_addr_label_cleanup();
5152 void addrconf_cleanup(void)
5154 struct net_device *dev;
5157 unregister_netdevice_notifier(&ipv6_dev_notf);
5158 unregister_pernet_subsys(&addrconf_ops);
5159 ipv6_addr_label_cleanup();
5163 __rtnl_af_unregister(&inet6_ops);
5165 /* clean dev list */
5166 for_each_netdev(&init_net, dev) {
5167 if (__in6_dev_get(dev) == NULL)
5169 addrconf_ifdown(dev, 1);
5171 addrconf_ifdown(init_net.loopback_dev, 2);
5176 spin_lock_bh(&addrconf_hash_lock);
5177 for (i = 0; i < IN6_ADDR_HSIZE; i++)
5178 WARN_ON(!hlist_empty(&inet6_addr_lst[i]));
5179 spin_unlock_bh(&addrconf_hash_lock);
5181 del_timer(&addr_chk_timer);