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 #include <linux/errno.h>
42 #include <linux/types.h>
43 #include <linux/kernel.h>
44 #include <linux/socket.h>
45 #include <linux/sockios.h>
46 #include <linux/net.h>
47 #include <linux/in6.h>
48 #include <linux/netdevice.h>
49 #include <linux/if_addr.h>
50 #include <linux/if_arp.h>
51 #include <linux/if_arcnet.h>
52 #include <linux/if_infiniband.h>
53 #include <linux/route.h>
54 #include <linux/inetdevice.h>
55 #include <linux/init.h>
57 #include <linux/sysctl.h>
59 #include <linux/capability.h>
60 #include <linux/delay.h>
61 #include <linux/notifier.h>
62 #include <linux/string.h>
64 #include <net/net_namespace.h>
69 #include <net/protocol.h>
70 #include <net/ndisc.h>
71 #include <net/ip6_route.h>
72 #include <net/addrconf.h>
75 #include <net/netlink.h>
76 #include <net/pkt_sched.h>
77 #include <linux/if_tunnel.h>
78 #include <linux/rtnetlink.h>
80 #ifdef CONFIG_IPV6_PRIVACY
81 #include <linux/random.h>
84 #include <linux/uaccess.h>
85 #include <asm/unaligned.h>
87 #include <linux/proc_fs.h>
88 #include <linux/seq_file.h>
90 /* Set to 3 to get tracing... */
94 #define ADBG(x) printk x
99 #define INFINITY_LIFE_TIME 0xFFFFFFFF
100 #define TIME_DELTA(a, b) ((unsigned long)((long)(a) - (long)(b)))
103 static void addrconf_sysctl_register(struct inet6_dev
*idev
);
104 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
);
106 static inline void addrconf_sysctl_register(struct inet6_dev
*idev
)
110 static inline void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
115 #ifdef CONFIG_IPV6_PRIVACY
116 static int __ipv6_regen_rndid(struct inet6_dev
*idev
);
117 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
118 static void ipv6_regen_rndid(unsigned long data
);
120 static int desync_factor
= MAX_DESYNC_FACTOR
* HZ
;
123 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
);
124 static int ipv6_count_addresses(struct inet6_dev
*idev
);
127 * Configured unicast address hash table
129 static struct hlist_head inet6_addr_lst
[IN6_ADDR_HSIZE
];
130 static DEFINE_SPINLOCK(addrconf_hash_lock
);
132 static void addrconf_verify(unsigned long);
134 static DEFINE_TIMER(addr_chk_timer
, addrconf_verify
, 0, 0);
135 static DEFINE_SPINLOCK(addrconf_verify_lock
);
137 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
138 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
140 static void addrconf_type_change(struct net_device
*dev
,
141 unsigned long event
);
142 static int addrconf_ifdown(struct net_device
*dev
, int how
);
144 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
);
145 static void addrconf_dad_timer(unsigned long data
);
146 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
);
147 static void addrconf_dad_run(struct inet6_dev
*idev
);
148 static void addrconf_rs_timer(unsigned long data
);
149 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
150 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
152 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
153 struct prefix_info
*pinfo
);
154 static int ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
155 struct net_device
*dev
);
157 static ATOMIC_NOTIFIER_HEAD(inet6addr_chain
);
159 static struct ipv6_devconf ipv6_devconf __read_mostly
= {
161 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
162 .mtu6
= IPV6_MIN_MTU
,
164 .accept_redirects
= 1,
166 .force_mld_version
= 0,
168 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
169 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
170 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
171 #ifdef CONFIG_IPV6_PRIVACY
173 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
174 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
175 .regen_max_retry
= REGEN_MAX_RETRY
,
176 .max_desync_factor
= MAX_DESYNC_FACTOR
,
178 .max_addresses
= IPV6_MAX_ADDRESSES
,
179 .accept_ra_defrtr
= 1,
180 .accept_ra_pinfo
= 1,
181 #ifdef CONFIG_IPV6_ROUTER_PREF
182 .accept_ra_rtr_pref
= 1,
183 .rtr_probe_interval
= 60 * HZ
,
184 #ifdef CONFIG_IPV6_ROUTE_INFO
185 .accept_ra_rt_info_max_plen
= 0,
189 .accept_source_route
= 0, /* we do not accept RH0 by default. */
194 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly
= {
196 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
197 .mtu6
= IPV6_MIN_MTU
,
199 .accept_redirects
= 1,
202 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
203 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
204 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
205 #ifdef CONFIG_IPV6_PRIVACY
207 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
208 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
209 .regen_max_retry
= REGEN_MAX_RETRY
,
210 .max_desync_factor
= MAX_DESYNC_FACTOR
,
212 .max_addresses
= IPV6_MAX_ADDRESSES
,
213 .accept_ra_defrtr
= 1,
214 .accept_ra_pinfo
= 1,
215 #ifdef CONFIG_IPV6_ROUTER_PREF
216 .accept_ra_rtr_pref
= 1,
217 .rtr_probe_interval
= 60 * HZ
,
218 #ifdef CONFIG_IPV6_ROUTE_INFO
219 .accept_ra_rt_info_max_plen
= 0,
223 .accept_source_route
= 0, /* we do not accept RH0 by default. */
228 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
229 const struct in6_addr in6addr_any
= IN6ADDR_ANY_INIT
;
230 const struct in6_addr in6addr_loopback
= IN6ADDR_LOOPBACK_INIT
;
231 const struct in6_addr in6addr_linklocal_allnodes
= IN6ADDR_LINKLOCAL_ALLNODES_INIT
;
232 const struct in6_addr in6addr_linklocal_allrouters
= IN6ADDR_LINKLOCAL_ALLROUTERS_INIT
;
234 /* Check if a valid qdisc is available */
235 static inline bool addrconf_qdisc_ok(const struct net_device
*dev
)
237 return !qdisc_tx_is_noop(dev
);
240 /* Check if a route is valid prefix route */
241 static inline int addrconf_is_prefix_route(const struct rt6_info
*rt
)
243 return ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0);
246 static void addrconf_del_timer(struct inet6_ifaddr
*ifp
)
248 if (del_timer(&ifp
->timer
))
252 enum addrconf_timer_t
{
258 static void addrconf_mod_timer(struct inet6_ifaddr
*ifp
,
259 enum addrconf_timer_t what
,
262 if (!del_timer(&ifp
->timer
))
267 ifp
->timer
.function
= addrconf_dad_timer
;
270 ifp
->timer
.function
= addrconf_rs_timer
;
275 ifp
->timer
.expires
= jiffies
+ when
;
276 add_timer(&ifp
->timer
);
279 static int snmp6_alloc_dev(struct inet6_dev
*idev
)
281 if (snmp_mib_init((void __percpu
**)idev
->stats
.ipv6
,
282 sizeof(struct ipstats_mib
)) < 0)
284 if (snmp_mib_init((void __percpu
**)idev
->stats
.icmpv6
,
285 sizeof(struct icmpv6_mib
)) < 0)
287 if (snmp_mib_init((void __percpu
**)idev
->stats
.icmpv6msg
,
288 sizeof(struct icmpv6msg_mib
)) < 0)
294 snmp_mib_free((void __percpu
**)idev
->stats
.icmpv6
);
296 snmp_mib_free((void __percpu
**)idev
->stats
.ipv6
);
301 static void snmp6_free_dev(struct inet6_dev
*idev
)
303 snmp_mib_free((void __percpu
**)idev
->stats
.icmpv6msg
);
304 snmp_mib_free((void __percpu
**)idev
->stats
.icmpv6
);
305 snmp_mib_free((void __percpu
**)idev
->stats
.ipv6
);
308 /* Nobody refers to this device, we may destroy it. */
310 static void in6_dev_finish_destroy_rcu(struct rcu_head
*head
)
312 struct inet6_dev
*idev
= container_of(head
, struct inet6_dev
, rcu
);
316 void in6_dev_finish_destroy(struct inet6_dev
*idev
)
318 struct net_device
*dev
= idev
->dev
;
320 WARN_ON(!list_empty(&idev
->addr_list
));
321 WARN_ON(idev
->mc_list
!= NULL
);
323 #ifdef NET_REFCNT_DEBUG
324 printk(KERN_DEBUG
"in6_dev_finish_destroy: %s\n", dev
? dev
->name
: "NIL");
328 pr_warning("Freeing alive inet6 device %p\n", idev
);
331 snmp6_free_dev(idev
);
332 call_rcu(&idev
->rcu
, in6_dev_finish_destroy_rcu
);
335 EXPORT_SYMBOL(in6_dev_finish_destroy
);
337 static struct inet6_dev
* ipv6_add_dev(struct net_device
*dev
)
339 struct inet6_dev
*ndev
;
343 if (dev
->mtu
< IPV6_MIN_MTU
)
346 ndev
= kzalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
351 rwlock_init(&ndev
->lock
);
353 INIT_LIST_HEAD(&ndev
->addr_list
);
355 memcpy(&ndev
->cnf
, dev_net(dev
)->ipv6
.devconf_dflt
, sizeof(ndev
->cnf
));
356 ndev
->cnf
.mtu6
= dev
->mtu
;
357 ndev
->cnf
.sysctl
= NULL
;
358 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
359 if (ndev
->nd_parms
== NULL
) {
363 if (ndev
->cnf
.forwarding
)
364 dev_disable_lro(dev
);
365 /* We refer to the device */
368 if (snmp6_alloc_dev(ndev
) < 0) {
370 "%s(): cannot allocate memory for statistics; dev=%s.\n",
371 __func__
, dev
->name
));
372 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
374 in6_dev_finish_destroy(ndev
);
378 if (snmp6_register_dev(ndev
) < 0) {
380 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
381 __func__
, dev
->name
));
382 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
384 in6_dev_finish_destroy(ndev
);
388 /* One reference from device. We must do this before
389 * we invoke __ipv6_regen_rndid().
393 if (dev
->flags
& (IFF_NOARP
| IFF_LOOPBACK
))
394 ndev
->cnf
.accept_dad
= -1;
396 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
397 if (dev
->type
== ARPHRD_SIT
&& (dev
->priv_flags
& IFF_ISATAP
)) {
399 "%s: Disabled Multicast RS\n",
401 ndev
->cnf
.rtr_solicits
= 0;
405 #ifdef CONFIG_IPV6_PRIVACY
406 INIT_LIST_HEAD(&ndev
->tempaddr_list
);
407 setup_timer(&ndev
->regen_timer
, ipv6_regen_rndid
, (unsigned long)ndev
);
408 if ((dev
->flags
&IFF_LOOPBACK
) ||
409 dev
->type
== ARPHRD_TUNNEL
||
410 dev
->type
== ARPHRD_TUNNEL6
||
411 dev
->type
== ARPHRD_SIT
||
412 dev
->type
== ARPHRD_NONE
) {
414 "%s: Disabled Privacy Extensions\n",
416 ndev
->cnf
.use_tempaddr
= -1;
419 ipv6_regen_rndid((unsigned long) ndev
);
423 if (netif_running(dev
) && addrconf_qdisc_ok(dev
))
424 ndev
->if_flags
|= IF_READY
;
426 ipv6_mc_init_dev(ndev
);
427 ndev
->tstamp
= jiffies
;
428 addrconf_sysctl_register(ndev
);
429 /* protected by rtnl_lock */
430 rcu_assign_pointer(dev
->ip6_ptr
, ndev
);
432 /* Join all-node multicast group */
433 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allnodes
);
438 static struct inet6_dev
* ipv6_find_idev(struct net_device
*dev
)
440 struct inet6_dev
*idev
;
444 idev
= __in6_dev_get(dev
);
446 idev
= ipv6_add_dev(dev
);
451 if (dev
->flags
&IFF_UP
)
457 static void dev_forward_change(struct inet6_dev
*idev
)
459 struct net_device
*dev
;
460 struct inet6_ifaddr
*ifa
;
465 if (idev
->cnf
.forwarding
)
466 dev_disable_lro(dev
);
467 if (dev
&& (dev
->flags
& IFF_MULTICAST
)) {
468 if (idev
->cnf
.forwarding
)
469 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
471 ipv6_dev_mc_dec(dev
, &in6addr_linklocal_allrouters
);
474 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
475 if (ifa
->flags
&IFA_F_TENTATIVE
)
477 if (idev
->cnf
.forwarding
)
478 addrconf_join_anycast(ifa
);
480 addrconf_leave_anycast(ifa
);
485 static void addrconf_forward_change(struct net
*net
, __s32 newf
)
487 struct net_device
*dev
;
488 struct inet6_dev
*idev
;
491 for_each_netdev_rcu(net
, dev
) {
492 idev
= __in6_dev_get(dev
);
494 int changed
= (!idev
->cnf
.forwarding
) ^ (!newf
);
495 idev
->cnf
.forwarding
= newf
;
497 dev_forward_change(idev
);
503 static int addrconf_fixup_forwarding(struct ctl_table
*table
, int *p
, int old
)
507 net
= (struct net
*)table
->extra2
;
508 if (p
== &net
->ipv6
.devconf_dflt
->forwarding
)
511 if (!rtnl_trylock()) {
512 /* Restore the original values before restarting */
514 return restart_syscall();
517 if (p
== &net
->ipv6
.devconf_all
->forwarding
) {
518 __s32 newf
= net
->ipv6
.devconf_all
->forwarding
;
519 net
->ipv6
.devconf_dflt
->forwarding
= newf
;
520 addrconf_forward_change(net
, newf
);
521 } else if ((!*p
) ^ (!old
))
522 dev_forward_change((struct inet6_dev
*)table
->extra1
);
526 rt6_purge_dflt_routers(net
);
531 static void inet6_ifa_finish_destroy_rcu(struct rcu_head
*head
)
533 struct inet6_ifaddr
*ifp
= container_of(head
, struct inet6_ifaddr
, rcu
);
537 /* Nobody refers to this ifaddr, destroy it */
538 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
540 WARN_ON(!hlist_unhashed(&ifp
->addr_lst
));
542 #ifdef NET_REFCNT_DEBUG
543 printk(KERN_DEBUG
"inet6_ifa_finish_destroy\n");
546 in6_dev_put(ifp
->idev
);
548 if (del_timer(&ifp
->timer
))
549 pr_notice("Timer is still running, when freeing ifa=%p\n", ifp
);
552 pr_warning("Freeing alive inet6 address %p\n", ifp
);
555 dst_release(&ifp
->rt
->u
.dst
);
557 call_rcu(&ifp
->rcu
, inet6_ifa_finish_destroy_rcu
);
561 ipv6_link_dev_addr(struct inet6_dev
*idev
, struct inet6_ifaddr
*ifp
)
564 int ifp_scope
= ipv6_addr_src_scope(&ifp
->addr
);
567 * Each device address list is sorted in order of scope -
568 * global before linklocal.
570 list_for_each(p
, &idev
->addr_list
) {
571 struct inet6_ifaddr
*ifa
572 = list_entry(p
, struct inet6_ifaddr
, if_list
);
573 if (ifp_scope
>= ipv6_addr_src_scope(&ifa
->addr
))
577 list_add(&ifp
->if_list
, p
);
580 static u32
ipv6_addr_hash(const struct in6_addr
*addr
)
583 * We perform the hash function over the last 64 bits of the address
584 * This will include the IEEE address token on links that support it.
586 return jhash_2words(addr
->s6_addr32
[2], addr
->s6_addr32
[3], 0)
587 & (IN6_ADDR_HSIZE
- 1);
590 /* On success it returns ifp with increased reference count */
592 static struct inet6_ifaddr
*
593 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
, int pfxlen
,
594 int scope
, u32 flags
)
596 struct inet6_ifaddr
*ifa
= NULL
;
600 int addr_type
= ipv6_addr_type(addr
);
602 if (addr_type
== IPV6_ADDR_ANY
||
603 addr_type
& IPV6_ADDR_MULTICAST
||
604 (!(idev
->dev
->flags
& IFF_LOOPBACK
) &&
605 addr_type
& IPV6_ADDR_LOOPBACK
))
606 return ERR_PTR(-EADDRNOTAVAIL
);
610 err
= -ENODEV
; /*XXX*/
614 if (idev
->cnf
.disable_ipv6
) {
619 spin_lock(&addrconf_hash_lock
);
621 /* Ignore adding duplicate addresses on an interface */
622 if (ipv6_chk_same_addr(dev_net(idev
->dev
), addr
, idev
->dev
)) {
623 ADBG(("ipv6_add_addr: already assigned\n"));
628 ifa
= kzalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
631 ADBG(("ipv6_add_addr: malloc failed\n"));
636 rt
= addrconf_dst_alloc(idev
, addr
, 0);
642 ipv6_addr_copy(&ifa
->addr
, addr
);
644 spin_lock_init(&ifa
->lock
);
645 init_timer(&ifa
->timer
);
646 INIT_HLIST_NODE(&ifa
->addr_lst
);
647 ifa
->timer
.data
= (unsigned long) ifa
;
649 ifa
->prefix_len
= pfxlen
;
650 ifa
->flags
= flags
| IFA_F_TENTATIVE
;
651 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
656 * part one of RFC 4429, section 3.3
657 * We should not configure an address as
658 * optimistic if we do not yet know the link
659 * layer address of our nexhop router
662 if (rt
->rt6i_nexthop
== NULL
)
663 ifa
->flags
&= ~IFA_F_OPTIMISTIC
;
670 /* Add to big hash table */
671 hash
= ipv6_addr_hash(addr
);
673 hlist_add_head_rcu(&ifa
->addr_lst
, &inet6_addr_lst
[hash
]);
675 spin_unlock(&addrconf_hash_lock
);
677 write_lock(&idev
->lock
);
678 /* Add to inet6_dev unicast addr list. */
679 ipv6_link_dev_addr(idev
, ifa
);
681 #ifdef CONFIG_IPV6_PRIVACY
682 if (ifa
->flags
&IFA_F_TEMPORARY
) {
683 list_add(&ifa
->tmp_list
, &idev
->tempaddr_list
);
689 write_unlock(&idev
->lock
);
691 rcu_read_unlock_bh();
693 if (likely(err
== 0))
694 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_UP
, ifa
);
702 spin_unlock(&addrconf_hash_lock
);
706 /* This function wants to get referenced ifp and releases it before return */
708 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
710 struct inet6_ifaddr
*ifa
, *ifn
;
711 struct inet6_dev
*idev
= ifp
->idev
;
713 int deleted
= 0, onlink
= 0;
714 unsigned long expires
= jiffies
;
716 hash
= ipv6_addr_hash(&ifp
->addr
);
720 spin_lock_bh(&addrconf_hash_lock
);
721 hlist_del_init_rcu(&ifp
->addr_lst
);
723 spin_unlock_bh(&addrconf_hash_lock
);
725 write_lock_bh(&idev
->lock
);
726 #ifdef CONFIG_IPV6_PRIVACY
727 if (ifp
->flags
&IFA_F_TEMPORARY
) {
728 list_del(&ifp
->tmp_list
);
730 in6_ifa_put(ifp
->ifpub
);
737 list_for_each_entry_safe(ifa
, ifn
, &idev
->addr_list
, if_list
) {
739 list_del_init(&ifp
->if_list
);
742 if (!(ifp
->flags
& IFA_F_PERMANENT
) || onlink
> 0)
746 } else if (ifp
->flags
& IFA_F_PERMANENT
) {
747 if (ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
749 if (ifa
->flags
& IFA_F_PERMANENT
) {
754 unsigned long lifetime
;
759 spin_lock(&ifa
->lock
);
761 lifetime
= addrconf_timeout_fixup(ifa
->valid_lft
, HZ
);
763 * Note: Because this address is
764 * not permanent, lifetime <
765 * LONG_MAX / HZ here.
767 if (time_before(expires
,
768 ifa
->tstamp
+ lifetime
* HZ
))
769 expires
= ifa
->tstamp
+ lifetime
* HZ
;
770 spin_unlock(&ifa
->lock
);
775 write_unlock_bh(&idev
->lock
);
777 addrconf_del_timer(ifp
);
779 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
781 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifp
);
784 * Purge or update corresponding prefix
786 * 1) we don't purge prefix here if address was not permanent.
787 * prefix is managed by its own lifetime.
788 * 2) if there're no addresses, delete prefix.
789 * 3) if there're still other permanent address(es),
790 * corresponding prefix is still permanent.
791 * 4) otherwise, update prefix lifetime to the
792 * longest valid lifetime among the corresponding
793 * addresses on the device.
794 * Note: subsequent RA will update lifetime.
798 if ((ifp
->flags
& IFA_F_PERMANENT
) && onlink
< 1) {
799 struct in6_addr prefix
;
801 struct net
*net
= dev_net(ifp
->idev
->dev
);
802 ipv6_addr_prefix(&prefix
, &ifp
->addr
, ifp
->prefix_len
);
803 rt
= rt6_lookup(net
, &prefix
, NULL
, ifp
->idev
->dev
->ifindex
, 1);
805 if (rt
&& addrconf_is_prefix_route(rt
)) {
809 } else if (!(rt
->rt6i_flags
& RTF_EXPIRES
)) {
810 rt
->rt6i_expires
= expires
;
811 rt
->rt6i_flags
|= RTF_EXPIRES
;
814 dst_release(&rt
->u
.dst
);
820 #ifdef CONFIG_IPV6_PRIVACY
821 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
823 struct inet6_dev
*idev
= ifp
->idev
;
824 struct in6_addr addr
, *tmpaddr
;
825 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_cstamp
, tmp_tstamp
;
826 unsigned long regen_advance
;
832 write_lock(&idev
->lock
);
834 spin_lock_bh(&ift
->lock
);
835 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
836 spin_unlock_bh(&ift
->lock
);
843 if (idev
->cnf
.use_tempaddr
<= 0) {
844 write_unlock(&idev
->lock
);
846 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
851 spin_lock_bh(&ifp
->lock
);
852 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
853 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
854 spin_unlock_bh(&ifp
->lock
);
855 write_unlock(&idev
->lock
);
857 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
863 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
864 if (__ipv6_try_regen_rndid(idev
, tmpaddr
) < 0) {
865 spin_unlock_bh(&ifp
->lock
);
866 write_unlock(&idev
->lock
);
868 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
874 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
875 tmp_valid_lft
= min_t(__u32
,
877 idev
->cnf
.temp_valid_lft
);
878 tmp_prefered_lft
= min_t(__u32
,
880 idev
->cnf
.temp_prefered_lft
- desync_factor
/ HZ
);
881 tmp_plen
= ifp
->prefix_len
;
882 max_addresses
= idev
->cnf
.max_addresses
;
883 tmp_cstamp
= ifp
->cstamp
;
884 tmp_tstamp
= ifp
->tstamp
;
885 spin_unlock_bh(&ifp
->lock
);
887 regen_advance
= idev
->cnf
.regen_max_retry
*
888 idev
->cnf
.dad_transmits
*
889 idev
->nd_parms
->retrans_time
/ HZ
;
890 write_unlock(&idev
->lock
);
892 /* A temporary address is created only if this calculated Preferred
893 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
894 * an implementation must not create a temporary address with a zero
895 * Preferred Lifetime.
897 if (tmp_prefered_lft
<= regen_advance
) {
904 addr_flags
= IFA_F_TEMPORARY
;
905 /* set in addrconf_prefix_rcv() */
906 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
907 addr_flags
|= IFA_F_OPTIMISTIC
;
909 ift
= !max_addresses
||
910 ipv6_count_addresses(idev
) < max_addresses
?
911 ipv6_add_addr(idev
, &addr
, tmp_plen
,
912 ipv6_addr_type(&addr
)&IPV6_ADDR_SCOPE_MASK
,
914 if (!ift
|| IS_ERR(ift
)) {
918 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
920 write_lock(&idev
->lock
);
924 spin_lock_bh(&ift
->lock
);
926 ift
->valid_lft
= tmp_valid_lft
;
927 ift
->prefered_lft
= tmp_prefered_lft
;
928 ift
->cstamp
= tmp_cstamp
;
929 ift
->tstamp
= tmp_tstamp
;
930 spin_unlock_bh(&ift
->lock
);
932 addrconf_dad_start(ift
, 0);
941 * Choose an appropriate source address (RFC3484)
944 IPV6_SADDR_RULE_INIT
= 0,
945 IPV6_SADDR_RULE_LOCAL
,
946 IPV6_SADDR_RULE_SCOPE
,
947 IPV6_SADDR_RULE_PREFERRED
,
948 #ifdef CONFIG_IPV6_MIP6
952 IPV6_SADDR_RULE_LABEL
,
953 #ifdef CONFIG_IPV6_PRIVACY
954 IPV6_SADDR_RULE_PRIVACY
,
956 IPV6_SADDR_RULE_ORCHID
,
957 IPV6_SADDR_RULE_PREFIX
,
961 struct ipv6_saddr_score
{
964 struct inet6_ifaddr
*ifa
;
965 DECLARE_BITMAP(scorebits
, IPV6_SADDR_RULE_MAX
);
970 struct ipv6_saddr_dst
{
971 const struct in6_addr
*addr
;
978 static inline int ipv6_saddr_preferred(int type
)
980 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|IPV6_ADDR_LOOPBACK
))
985 static int ipv6_get_saddr_eval(struct net
*net
,
986 struct ipv6_saddr_score
*score
,
987 struct ipv6_saddr_dst
*dst
,
992 if (i
<= score
->rule
) {
994 case IPV6_SADDR_RULE_SCOPE
:
995 ret
= score
->scopedist
;
997 case IPV6_SADDR_RULE_PREFIX
:
998 ret
= score
->matchlen
;
1001 ret
= !!test_bit(i
, score
->scorebits
);
1007 case IPV6_SADDR_RULE_INIT
:
1008 /* Rule 0: remember if hiscore is not ready yet */
1011 case IPV6_SADDR_RULE_LOCAL
:
1012 /* Rule 1: Prefer same address */
1013 ret
= ipv6_addr_equal(&score
->ifa
->addr
, dst
->addr
);
1015 case IPV6_SADDR_RULE_SCOPE
:
1016 /* Rule 2: Prefer appropriate scope
1021 * ---+--+-+---> scope
1023 * | d is scope of the destination.
1025 * | \ <- smaller scope is better if
1026 * B-15 | \ if scope is enough for destinaion.
1027 * | ret = B - scope (-1 <= scope >= d <= 15).
1029 * |/ <- greater is better
1030 * -C / if scope is not enough for destination.
1031 * /| ret = scope - C (-1 <= d < scope <= 15).
1033 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1034 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1035 * Assume B = 0 and we get C > 29.
1037 ret
= __ipv6_addr_src_scope(score
->addr_type
);
1038 if (ret
>= dst
->scope
)
1041 ret
-= 128; /* 30 is enough */
1042 score
->scopedist
= ret
;
1044 case IPV6_SADDR_RULE_PREFERRED
:
1045 /* Rule 3: Avoid deprecated and optimistic addresses */
1046 ret
= ipv6_saddr_preferred(score
->addr_type
) ||
1047 !(score
->ifa
->flags
& (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
));
1049 #ifdef CONFIG_IPV6_MIP6
1050 case IPV6_SADDR_RULE_HOA
:
1052 /* Rule 4: Prefer home address */
1053 int prefhome
= !(dst
->prefs
& IPV6_PREFER_SRC_COA
);
1054 ret
= !(score
->ifa
->flags
& IFA_F_HOMEADDRESS
) ^ prefhome
;
1058 case IPV6_SADDR_RULE_OIF
:
1059 /* Rule 5: Prefer outgoing interface */
1060 ret
= (!dst
->ifindex
||
1061 dst
->ifindex
== score
->ifa
->idev
->dev
->ifindex
);
1063 case IPV6_SADDR_RULE_LABEL
:
1064 /* Rule 6: Prefer matching label */
1065 ret
= ipv6_addr_label(net
,
1066 &score
->ifa
->addr
, score
->addr_type
,
1067 score
->ifa
->idev
->dev
->ifindex
) == dst
->label
;
1069 #ifdef CONFIG_IPV6_PRIVACY
1070 case IPV6_SADDR_RULE_PRIVACY
:
1072 /* Rule 7: Prefer public address
1073 * Note: prefer temprary address if use_tempaddr >= 2
1075 int preftmp
= dst
->prefs
& (IPV6_PREFER_SRC_PUBLIC
|IPV6_PREFER_SRC_TMP
) ?
1076 !!(dst
->prefs
& IPV6_PREFER_SRC_TMP
) :
1077 score
->ifa
->idev
->cnf
.use_tempaddr
>= 2;
1078 ret
= (!(score
->ifa
->flags
& IFA_F_TEMPORARY
)) ^ preftmp
;
1082 case IPV6_SADDR_RULE_ORCHID
:
1083 /* Rule 8-: Prefer ORCHID vs ORCHID or
1084 * non-ORCHID vs non-ORCHID
1086 ret
= !(ipv6_addr_orchid(&score
->ifa
->addr
) ^
1087 ipv6_addr_orchid(dst
->addr
));
1089 case IPV6_SADDR_RULE_PREFIX
:
1090 /* Rule 8: Use longest matching prefix */
1091 score
->matchlen
= ret
= ipv6_addr_diff(&score
->ifa
->addr
,
1099 __set_bit(i
, score
->scorebits
);
1105 int ipv6_dev_get_saddr(struct net
*net
, struct net_device
*dst_dev
,
1106 const struct in6_addr
*daddr
, unsigned int prefs
,
1107 struct in6_addr
*saddr
)
1109 struct ipv6_saddr_score scores
[2],
1110 *score
= &scores
[0], *hiscore
= &scores
[1];
1111 struct ipv6_saddr_dst dst
;
1112 struct net_device
*dev
;
1115 dst_type
= __ipv6_addr_type(daddr
);
1117 dst
.ifindex
= dst_dev
? dst_dev
->ifindex
: 0;
1118 dst
.scope
= __ipv6_addr_src_scope(dst_type
);
1119 dst
.label
= ipv6_addr_label(net
, daddr
, dst_type
, dst
.ifindex
);
1123 hiscore
->ifa
= NULL
;
1127 for_each_netdev_rcu(net
, dev
) {
1128 struct inet6_dev
*idev
;
1130 /* Candidate Source Address (section 4)
1131 * - multicast and link-local destination address,
1132 * the set of candidate source address MUST only
1133 * include addresses assigned to interfaces
1134 * belonging to the same link as the outgoing
1136 * (- For site-local destination addresses, the
1137 * set of candidate source addresses MUST only
1138 * include addresses assigned to interfaces
1139 * belonging to the same site as the outgoing
1142 if (((dst_type
& IPV6_ADDR_MULTICAST
) ||
1143 dst
.scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
) &&
1144 dst
.ifindex
&& dev
->ifindex
!= dst
.ifindex
)
1147 idev
= __in6_dev_get(dev
);
1151 read_lock_bh(&idev
->lock
);
1152 list_for_each_entry(score
->ifa
, &idev
->addr_list
, if_list
) {
1156 * - Tentative Address (RFC2462 section 5.4)
1157 * - A tentative address is not considered
1158 * "assigned to an interface" in the traditional
1159 * sense, unless it is also flagged as optimistic.
1160 * - Candidate Source Address (section 4)
1161 * - In any case, anycast addresses, multicast
1162 * addresses, and the unspecified address MUST
1163 * NOT be included in a candidate set.
1165 if ((score
->ifa
->flags
& IFA_F_TENTATIVE
) &&
1166 (!(score
->ifa
->flags
& IFA_F_OPTIMISTIC
)))
1169 score
->addr_type
= __ipv6_addr_type(&score
->ifa
->addr
);
1171 if (unlikely(score
->addr_type
== IPV6_ADDR_ANY
||
1172 score
->addr_type
& IPV6_ADDR_MULTICAST
)) {
1173 LIMIT_NETDEBUG(KERN_DEBUG
1174 "ADDRCONF: unspecified / multicast address "
1175 "assigned as unicast address on %s",
1181 bitmap_zero(score
->scorebits
, IPV6_SADDR_RULE_MAX
);
1183 for (i
= 0; i
< IPV6_SADDR_RULE_MAX
; i
++) {
1184 int minihiscore
, miniscore
;
1186 minihiscore
= ipv6_get_saddr_eval(net
, hiscore
, &dst
, i
);
1187 miniscore
= ipv6_get_saddr_eval(net
, score
, &dst
, i
);
1189 if (minihiscore
> miniscore
) {
1190 if (i
== IPV6_SADDR_RULE_SCOPE
&&
1191 score
->scopedist
> 0) {
1194 * each remaining entry
1195 * has too small (not enough)
1196 * scope, because ifa entries
1197 * are sorted by their scope
1203 } else if (minihiscore
< miniscore
) {
1205 in6_ifa_put(hiscore
->ifa
);
1207 in6_ifa_hold(score
->ifa
);
1209 swap(hiscore
, score
);
1211 /* restore our iterator */
1212 score
->ifa
= hiscore
->ifa
;
1219 read_unlock_bh(&idev
->lock
);
1224 return -EADDRNOTAVAIL
;
1226 ipv6_addr_copy(saddr
, &hiscore
->ifa
->addr
);
1227 in6_ifa_put(hiscore
->ifa
);
1230 EXPORT_SYMBOL(ipv6_dev_get_saddr
);
1232 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1233 unsigned char banned_flags
)
1235 struct inet6_dev
*idev
;
1236 int err
= -EADDRNOTAVAIL
;
1239 idev
= __in6_dev_get(dev
);
1241 struct inet6_ifaddr
*ifp
;
1243 read_lock_bh(&idev
->lock
);
1244 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
1245 if (ifp
->scope
== IFA_LINK
&&
1246 !(ifp
->flags
& banned_flags
)) {
1247 ipv6_addr_copy(addr
, &ifp
->addr
);
1252 read_unlock_bh(&idev
->lock
);
1258 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1261 struct inet6_ifaddr
*ifp
;
1263 read_lock_bh(&idev
->lock
);
1264 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
)
1266 read_unlock_bh(&idev
->lock
);
1270 int ipv6_chk_addr(struct net
*net
, struct in6_addr
*addr
,
1271 struct net_device
*dev
, int strict
)
1273 struct inet6_ifaddr
*ifp
= NULL
;
1274 struct hlist_node
*node
;
1275 unsigned int hash
= ipv6_addr_hash(addr
);
1278 hlist_for_each_entry_rcu(ifp
, node
, &inet6_addr_lst
[hash
], addr_lst
) {
1279 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1281 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1282 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1283 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1284 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))
1288 rcu_read_unlock_bh();
1292 EXPORT_SYMBOL(ipv6_chk_addr
);
1295 int ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
1296 struct net_device
*dev
)
1298 struct inet6_ifaddr
*ifp
;
1299 struct hlist_node
*node
;
1300 unsigned int hash
= ipv6_addr_hash(addr
);
1302 hlist_for_each_entry(ifp
, node
, &inet6_addr_lst
[hash
], addr_lst
) {
1303 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1305 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1306 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1313 int ipv6_chk_prefix(struct in6_addr
*addr
, struct net_device
*dev
)
1315 struct inet6_dev
*idev
;
1316 struct inet6_ifaddr
*ifa
;
1321 idev
= __in6_dev_get(dev
);
1323 read_lock_bh(&idev
->lock
);
1324 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
1325 onlink
= ipv6_prefix_equal(addr
, &ifa
->addr
,
1330 read_unlock_bh(&idev
->lock
);
1336 EXPORT_SYMBOL(ipv6_chk_prefix
);
1338 struct inet6_ifaddr
*ipv6_get_ifaddr(struct net
*net
, const struct in6_addr
*addr
,
1339 struct net_device
*dev
, int strict
)
1341 struct inet6_ifaddr
*ifp
= NULL
;
1342 struct hlist_node
*node
;
1343 unsigned int hash
= ipv6_addr_hash(addr
);
1346 hlist_for_each_entry_rcu(ifp
, node
, &inet6_addr_lst
[hash
], addr_lst
) {
1347 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1349 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1350 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1351 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1357 rcu_read_unlock_bh();
1362 /* Gets referenced address, destroys ifaddr */
1364 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
, int dad_failed
)
1366 if (ifp
->flags
&IFA_F_PERMANENT
) {
1367 spin_lock_bh(&ifp
->lock
);
1368 addrconf_del_timer(ifp
);
1369 ifp
->flags
|= IFA_F_TENTATIVE
;
1371 ifp
->flags
|= IFA_F_DADFAILED
;
1372 spin_unlock_bh(&ifp
->lock
);
1374 ipv6_ifa_notify(0, ifp
);
1376 #ifdef CONFIG_IPV6_PRIVACY
1377 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1378 struct inet6_ifaddr
*ifpub
;
1379 spin_lock_bh(&ifp
->lock
);
1382 in6_ifa_hold(ifpub
);
1383 spin_unlock_bh(&ifp
->lock
);
1384 ipv6_create_tempaddr(ifpub
, ifp
);
1387 spin_unlock_bh(&ifp
->lock
);
1395 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1397 struct inet6_dev
*idev
= ifp
->idev
;
1399 if (net_ratelimit())
1400 printk(KERN_INFO
"%s: IPv6 duplicate address %pI6c detected!\n",
1401 ifp
->idev
->dev
->name
, &ifp
->addr
);
1403 if (idev
->cnf
.accept_dad
> 1 && !idev
->cnf
.disable_ipv6
) {
1404 struct in6_addr addr
;
1406 addr
.s6_addr32
[0] = htonl(0xfe800000);
1407 addr
.s6_addr32
[1] = 0;
1409 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) &&
1410 ipv6_addr_equal(&ifp
->addr
, &addr
)) {
1411 /* DAD failed for link-local based on MAC address */
1412 idev
->cnf
.disable_ipv6
= 1;
1414 printk(KERN_INFO
"%s: IPv6 being disabled!\n",
1415 ifp
->idev
->dev
->name
);
1419 addrconf_dad_stop(ifp
, 1);
1422 /* Join to solicited addr multicast group. */
1424 void addrconf_join_solict(struct net_device
*dev
, struct in6_addr
*addr
)
1426 struct in6_addr maddr
;
1428 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1431 addrconf_addr_solict_mult(addr
, &maddr
);
1432 ipv6_dev_mc_inc(dev
, &maddr
);
1435 void addrconf_leave_solict(struct inet6_dev
*idev
, struct in6_addr
*addr
)
1437 struct in6_addr maddr
;
1439 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1442 addrconf_addr_solict_mult(addr
, &maddr
);
1443 __ipv6_dev_mc_dec(idev
, &maddr
);
1446 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1448 struct in6_addr addr
;
1449 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1450 if (ipv6_addr_any(&addr
))
1452 ipv6_dev_ac_inc(ifp
->idev
->dev
, &addr
);
1455 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1457 struct in6_addr addr
;
1458 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1459 if (ipv6_addr_any(&addr
))
1461 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1464 static int addrconf_ifid_eui48(u8
*eui
, struct net_device
*dev
)
1466 if (dev
->addr_len
!= ETH_ALEN
)
1468 memcpy(eui
, dev
->dev_addr
, 3);
1469 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1472 * The zSeries OSA network cards can be shared among various
1473 * OS instances, but the OSA cards have only one MAC address.
1474 * This leads to duplicate address conflicts in conjunction
1475 * with IPv6 if more than one instance uses the same card.
1477 * The driver for these cards can deliver a unique 16-bit
1478 * identifier for each instance sharing the same card. It is
1479 * placed instead of 0xFFFE in the interface identifier. The
1480 * "u" bit of the interface identifier is not inverted in this
1481 * case. Hence the resulting interface identifier has local
1482 * scope according to RFC2373.
1485 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1486 eui
[4] = dev
->dev_id
& 0xFF;
1495 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
1497 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1498 if (dev
->addr_len
!= ARCNET_ALEN
)
1501 eui
[7] = *(u8
*)dev
->dev_addr
;
1505 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
1507 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1509 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1514 int __ipv6_isatap_ifid(u8
*eui
, __be32 addr
)
1518 eui
[0] = (ipv4_is_zeronet(addr
) || ipv4_is_private_10(addr
) ||
1519 ipv4_is_loopback(addr
) || ipv4_is_linklocal_169(addr
) ||
1520 ipv4_is_private_172(addr
) || ipv4_is_test_192(addr
) ||
1521 ipv4_is_anycast_6to4(addr
) || ipv4_is_private_192(addr
) ||
1522 ipv4_is_test_198(addr
) || ipv4_is_multicast(addr
) ||
1523 ipv4_is_lbcast(addr
)) ? 0x00 : 0x02;
1527 memcpy(eui
+ 4, &addr
, 4);
1530 EXPORT_SYMBOL(__ipv6_isatap_ifid
);
1532 static int addrconf_ifid_sit(u8
*eui
, struct net_device
*dev
)
1534 if (dev
->priv_flags
& IFF_ISATAP
)
1535 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
1539 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1541 switch (dev
->type
) {
1544 case ARPHRD_IEEE802_TR
:
1545 return addrconf_ifid_eui48(eui
, dev
);
1547 return addrconf_ifid_arcnet(eui
, dev
);
1548 case ARPHRD_INFINIBAND
:
1549 return addrconf_ifid_infiniband(eui
, dev
);
1551 return addrconf_ifid_sit(eui
, dev
);
1556 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1559 struct inet6_ifaddr
*ifp
;
1561 read_lock_bh(&idev
->lock
);
1562 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
1563 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1564 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1569 read_unlock_bh(&idev
->lock
);
1573 #ifdef CONFIG_IPV6_PRIVACY
1574 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1575 static int __ipv6_regen_rndid(struct inet6_dev
*idev
)
1578 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
1579 idev
->rndid
[0] &= ~0x02;
1582 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1583 * check if generated address is not inappropriate
1585 * - Reserved subnet anycast (RFC 2526)
1586 * 11111101 11....11 1xxxxxxx
1587 * - ISATAP (RFC4214) 6.1
1588 * 00-00-5E-FE-xx-xx-xx-xx
1590 * - XXX: already assigned to an address on the device
1592 if (idev
->rndid
[0] == 0xfd &&
1593 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1594 (idev
->rndid
[7]&0x80))
1596 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1597 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1599 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1606 static void ipv6_regen_rndid(unsigned long data
)
1608 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1609 unsigned long expires
;
1612 write_lock_bh(&idev
->lock
);
1617 if (__ipv6_regen_rndid(idev
) < 0)
1621 idev
->cnf
.temp_prefered_lft
* HZ
-
1622 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
- desync_factor
;
1623 if (time_before(expires
, jiffies
)) {
1625 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1630 if (!mod_timer(&idev
->regen_timer
, expires
))
1634 write_unlock_bh(&idev
->lock
);
1635 rcu_read_unlock_bh();
1639 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
) {
1642 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1643 ret
= __ipv6_regen_rndid(idev
);
1653 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1654 unsigned long expires
, u32 flags
)
1656 struct fib6_config cfg
= {
1657 .fc_table
= RT6_TABLE_PREFIX
,
1658 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1659 .fc_ifindex
= dev
->ifindex
,
1660 .fc_expires
= expires
,
1662 .fc_flags
= RTF_UP
| flags
,
1663 .fc_nlinfo
.nl_net
= dev_net(dev
),
1664 .fc_protocol
= RTPROT_KERNEL
,
1667 ipv6_addr_copy(&cfg
.fc_dst
, pfx
);
1669 /* Prevent useless cloning on PtP SIT.
1670 This thing is done here expecting that the whole
1671 class of non-broadcast devices need not cloning.
1673 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1674 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
1675 cfg
.fc_flags
|= RTF_NONEXTHOP
;
1678 ip6_route_add(&cfg
);
1681 /* Create "default" multicast route to the interface */
1683 static void addrconf_add_mroute(struct net_device
*dev
)
1685 struct fib6_config cfg
= {
1686 .fc_table
= RT6_TABLE_LOCAL
,
1687 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1688 .fc_ifindex
= dev
->ifindex
,
1691 .fc_nlinfo
.nl_net
= dev_net(dev
),
1694 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
1696 ip6_route_add(&cfg
);
1699 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1700 static void sit_route_add(struct net_device
*dev
)
1702 struct fib6_config cfg
= {
1703 .fc_table
= RT6_TABLE_MAIN
,
1704 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1705 .fc_ifindex
= dev
->ifindex
,
1707 .fc_flags
= RTF_UP
| RTF_NONEXTHOP
,
1708 .fc_nlinfo
.nl_net
= dev_net(dev
),
1711 /* prefix length - 96 bits "::d.d.d.d" */
1712 ip6_route_add(&cfg
);
1716 static void addrconf_add_lroute(struct net_device
*dev
)
1718 struct in6_addr addr
;
1720 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
1721 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
1724 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
1726 struct inet6_dev
*idev
;
1730 idev
= ipv6_find_idev(dev
);
1734 /* Add default multicast route */
1735 addrconf_add_mroute(dev
);
1737 /* Add link local route */
1738 addrconf_add_lroute(dev
);
1742 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
)
1744 struct prefix_info
*pinfo
;
1748 struct inet6_dev
*in6_dev
;
1749 struct net
*net
= dev_net(dev
);
1751 pinfo
= (struct prefix_info
*) opt
;
1753 if (len
< sizeof(struct prefix_info
)) {
1754 ADBG(("addrconf: prefix option too short\n"));
1759 * Validation checks ([ADDRCONF], page 19)
1762 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
1764 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
1767 valid_lft
= ntohl(pinfo
->valid
);
1768 prefered_lft
= ntohl(pinfo
->prefered
);
1770 if (prefered_lft
> valid_lft
) {
1771 if (net_ratelimit())
1772 printk(KERN_WARNING
"addrconf: prefix option has invalid lifetime\n");
1776 in6_dev
= in6_dev_get(dev
);
1778 if (in6_dev
== NULL
) {
1779 if (net_ratelimit())
1780 printk(KERN_DEBUG
"addrconf: device %s not configured\n", dev
->name
);
1785 * Two things going on here:
1786 * 1) Add routes for on-link prefixes
1787 * 2) Configure prefixes with the auto flag set
1790 if (pinfo
->onlink
) {
1791 struct rt6_info
*rt
;
1792 unsigned long rt_expires
;
1794 /* Avoid arithmetic overflow. Really, we could
1795 * save rt_expires in seconds, likely valid_lft,
1796 * but it would require division in fib gc, that it
1800 rt_expires
= addrconf_timeout_fixup(valid_lft
, HZ
);
1802 rt_expires
= addrconf_timeout_fixup(valid_lft
, USER_HZ
);
1804 if (addrconf_finite_timeout(rt_expires
))
1807 rt
= rt6_lookup(net
, &pinfo
->prefix
, NULL
,
1810 if (rt
&& addrconf_is_prefix_route(rt
)) {
1811 /* Autoconf prefix route */
1812 if (valid_lft
== 0) {
1815 } else if (addrconf_finite_timeout(rt_expires
)) {
1817 rt
->rt6i_expires
= jiffies
+ rt_expires
;
1818 rt
->rt6i_flags
|= RTF_EXPIRES
;
1820 rt
->rt6i_flags
&= ~RTF_EXPIRES
;
1821 rt
->rt6i_expires
= 0;
1823 } else if (valid_lft
) {
1824 clock_t expires
= 0;
1825 int flags
= RTF_ADDRCONF
| RTF_PREFIX_RT
;
1826 if (addrconf_finite_timeout(rt_expires
)) {
1828 flags
|= RTF_EXPIRES
;
1829 expires
= jiffies_to_clock_t(rt_expires
);
1831 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
1832 dev
, expires
, flags
);
1835 dst_release(&rt
->u
.dst
);
1838 /* Try to figure out our local address for this prefix */
1840 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
1841 struct inet6_ifaddr
* ifp
;
1842 struct in6_addr addr
;
1843 int create
= 0, update_lft
= 0;
1845 if (pinfo
->prefix_len
== 64) {
1846 memcpy(&addr
, &pinfo
->prefix
, 8);
1847 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
1848 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
1849 in6_dev_put(in6_dev
);
1854 if (net_ratelimit())
1855 printk(KERN_DEBUG
"IPv6 addrconf: prefix with wrong length %d\n",
1857 in6_dev_put(in6_dev
);
1862 ifp
= ipv6_get_ifaddr(net
, &addr
, dev
, 1);
1864 if (ifp
== NULL
&& valid_lft
) {
1865 int max_addresses
= in6_dev
->cnf
.max_addresses
;
1868 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1869 if (in6_dev
->cnf
.optimistic_dad
&&
1870 !net
->ipv6
.devconf_all
->forwarding
)
1871 addr_flags
= IFA_F_OPTIMISTIC
;
1874 /* Do not allow to create too much of autoconfigured
1875 * addresses; this would be too easy way to crash kernel.
1877 if (!max_addresses
||
1878 ipv6_count_addresses(in6_dev
) < max_addresses
)
1879 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
1880 addr_type
&IPV6_ADDR_SCOPE_MASK
,
1883 if (!ifp
|| IS_ERR(ifp
)) {
1884 in6_dev_put(in6_dev
);
1888 update_lft
= create
= 1;
1889 ifp
->cstamp
= jiffies
;
1890 addrconf_dad_start(ifp
, RTF_ADDRCONF
|RTF_PREFIX_RT
);
1896 #ifdef CONFIG_IPV6_PRIVACY
1897 struct inet6_ifaddr
*ift
;
1901 /* update lifetime (RFC2462 5.5.3 e) */
1902 spin_lock(&ifp
->lock
);
1904 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
1905 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
1908 if (!update_lft
&& stored_lft
) {
1909 if (valid_lft
> MIN_VALID_LIFETIME
||
1910 valid_lft
> stored_lft
)
1912 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
1913 /* valid_lft <= stored_lft is always true */
1915 * RFC 4862 Section 5.5.3e:
1916 * "Note that the preferred lifetime of
1917 * the corresponding address is always
1918 * reset to the Preferred Lifetime in
1919 * the received Prefix Information
1920 * option, regardless of whether the
1921 * valid lifetime is also reset or
1924 * So if the preferred lifetime in
1925 * this advertisement is different
1926 * than what we have stored, but the
1927 * valid lifetime is invalid, just
1928 * reset prefered_lft.
1930 * We must set the valid lifetime
1931 * to the stored lifetime since we'll
1932 * be updating the timestamp below,
1933 * else we'll set it back to the
1936 if (prefered_lft
!= ifp
->prefered_lft
) {
1937 valid_lft
= stored_lft
;
1941 valid_lft
= MIN_VALID_LIFETIME
;
1942 if (valid_lft
< prefered_lft
)
1943 prefered_lft
= valid_lft
;
1949 ifp
->valid_lft
= valid_lft
;
1950 ifp
->prefered_lft
= prefered_lft
;
1953 ifp
->flags
&= ~IFA_F_DEPRECATED
;
1954 spin_unlock(&ifp
->lock
);
1956 if (!(flags
&IFA_F_TENTATIVE
))
1957 ipv6_ifa_notify(0, ifp
);
1959 spin_unlock(&ifp
->lock
);
1961 #ifdef CONFIG_IPV6_PRIVACY
1962 read_lock_bh(&in6_dev
->lock
);
1963 /* update all temporary addresses in the list */
1964 list_for_each_entry(ift
, &in6_dev
->tempaddr_list
, tmp_list
) {
1966 * When adjusting the lifetimes of an existing
1967 * temporary address, only lower the lifetimes.
1968 * Implementations must not increase the
1969 * lifetimes of an existing temporary address
1970 * when processing a Prefix Information Option.
1972 if (ifp
!= ift
->ifpub
)
1975 spin_lock(&ift
->lock
);
1977 if (ift
->valid_lft
> valid_lft
&&
1978 ift
->valid_lft
- valid_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1979 ift
->valid_lft
= valid_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1980 if (ift
->prefered_lft
> prefered_lft
&&
1981 ift
->prefered_lft
- prefered_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1982 ift
->prefered_lft
= prefered_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1983 spin_unlock(&ift
->lock
);
1984 if (!(flags
&IFA_F_TENTATIVE
))
1985 ipv6_ifa_notify(0, ift
);
1988 if (create
&& in6_dev
->cnf
.use_tempaddr
> 0) {
1990 * When a new public address is created as described in [ADDRCONF],
1991 * also create a new temporary address.
1993 read_unlock_bh(&in6_dev
->lock
);
1994 ipv6_create_tempaddr(ifp
, NULL
);
1996 read_unlock_bh(&in6_dev
->lock
);
2003 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
2004 in6_dev_put(in6_dev
);
2008 * Set destination address.
2009 * Special case for SIT interfaces where we create a new "virtual"
2012 int addrconf_set_dstaddr(struct net
*net
, void __user
*arg
)
2014 struct in6_ifreq ireq
;
2015 struct net_device
*dev
;
2021 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2024 dev
= __dev_get_by_index(net
, ireq
.ifr6_ifindex
);
2030 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2031 if (dev
->type
== ARPHRD_SIT
) {
2032 const struct net_device_ops
*ops
= dev
->netdev_ops
;
2034 struct ip_tunnel_parm p
;
2036 err
= -EADDRNOTAVAIL
;
2037 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
2040 memset(&p
, 0, sizeof(p
));
2041 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
2045 p
.iph
.protocol
= IPPROTO_IPV6
;
2047 ifr
.ifr_ifru
.ifru_data
= (__force
void __user
*)&p
;
2049 if (ops
->ndo_do_ioctl
) {
2050 mm_segment_t oldfs
= get_fs();
2053 err
= ops
->ndo_do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
2060 dev
= __dev_get_by_name(net
, p
.name
);
2063 err
= dev_open(dev
);
2074 * Manual configuration of address on an interface
2076 static int inet6_addr_add(struct net
*net
, int ifindex
, struct in6_addr
*pfx
,
2077 unsigned int plen
, __u8 ifa_flags
, __u32 prefered_lft
,
2080 struct inet6_ifaddr
*ifp
;
2081 struct inet6_dev
*idev
;
2082 struct net_device
*dev
;
2086 unsigned long timeout
;
2093 /* check the lifetime */
2094 if (!valid_lft
|| prefered_lft
> valid_lft
)
2097 dev
= __dev_get_by_index(net
, ifindex
);
2101 if ((idev
= addrconf_add_dev(dev
)) == NULL
)
2104 scope
= ipv6_addr_scope(pfx
);
2106 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
2107 if (addrconf_finite_timeout(timeout
)) {
2108 expires
= jiffies_to_clock_t(timeout
* HZ
);
2109 valid_lft
= timeout
;
2110 flags
= RTF_EXPIRES
;
2114 ifa_flags
|= IFA_F_PERMANENT
;
2117 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
2118 if (addrconf_finite_timeout(timeout
)) {
2120 ifa_flags
|= IFA_F_DEPRECATED
;
2121 prefered_lft
= timeout
;
2124 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, ifa_flags
);
2127 spin_lock_bh(&ifp
->lock
);
2128 ifp
->valid_lft
= valid_lft
;
2129 ifp
->prefered_lft
= prefered_lft
;
2130 ifp
->tstamp
= jiffies
;
2131 spin_unlock_bh(&ifp
->lock
);
2133 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
2136 * Note that section 3.1 of RFC 4429 indicates
2137 * that the Optimistic flag should not be set for
2138 * manually configured addresses
2140 addrconf_dad_start(ifp
, 0);
2146 return PTR_ERR(ifp
);
2149 static int inet6_addr_del(struct net
*net
, int ifindex
, struct in6_addr
*pfx
,
2152 struct inet6_ifaddr
*ifp
;
2153 struct inet6_dev
*idev
;
2154 struct net_device
*dev
;
2159 dev
= __dev_get_by_index(net
, ifindex
);
2163 if ((idev
= __in6_dev_get(dev
)) == NULL
)
2166 read_lock_bh(&idev
->lock
);
2167 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
2168 if (ifp
->prefix_len
== plen
&&
2169 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
2171 read_unlock_bh(&idev
->lock
);
2175 /* If the last address is deleted administratively,
2176 disable IPv6 on this interface.
2178 if (list_empty(&idev
->addr_list
))
2179 addrconf_ifdown(idev
->dev
, 1);
2183 read_unlock_bh(&idev
->lock
);
2184 return -EADDRNOTAVAIL
;
2188 int addrconf_add_ifaddr(struct net
*net
, void __user
*arg
)
2190 struct in6_ifreq ireq
;
2193 if (!capable(CAP_NET_ADMIN
))
2196 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2200 err
= inet6_addr_add(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2201 ireq
.ifr6_prefixlen
, IFA_F_PERMANENT
,
2202 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2207 int addrconf_del_ifaddr(struct net
*net
, void __user
*arg
)
2209 struct in6_ifreq ireq
;
2212 if (!capable(CAP_NET_ADMIN
))
2215 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2219 err
= inet6_addr_del(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2220 ireq
.ifr6_prefixlen
);
2225 static void add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
2226 int plen
, int scope
)
2228 struct inet6_ifaddr
*ifp
;
2230 ifp
= ipv6_add_addr(idev
, addr
, plen
, scope
, IFA_F_PERMANENT
);
2232 spin_lock_bh(&ifp
->lock
);
2233 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2234 spin_unlock_bh(&ifp
->lock
);
2235 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2240 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2241 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
2243 struct in6_addr addr
;
2244 struct net_device
*dev
;
2245 struct net
*net
= dev_net(idev
->dev
);
2250 memset(&addr
, 0, sizeof(struct in6_addr
));
2251 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
2253 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
2254 addr
.s6_addr32
[0] = htonl(0xfe800000);
2257 scope
= IPV6_ADDR_COMPATv4
;
2260 if (addr
.s6_addr32
[3]) {
2261 add_addr(idev
, &addr
, 128, scope
);
2265 for_each_netdev(net
, dev
) {
2266 struct in_device
* in_dev
= __in_dev_get_rtnl(dev
);
2267 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
2268 struct in_ifaddr
* ifa
;
2272 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
2275 addr
.s6_addr32
[3] = ifa
->ifa_local
;
2277 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
2279 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
2280 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2284 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2289 add_addr(idev
, &addr
, plen
, flag
);
2296 static void init_loopback(struct net_device
*dev
)
2298 struct inet6_dev
*idev
;
2304 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2305 printk(KERN_DEBUG
"init loopback: add_dev failed\n");
2309 add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
);
2312 static void addrconf_add_linklocal(struct inet6_dev
*idev
, struct in6_addr
*addr
)
2314 struct inet6_ifaddr
* ifp
;
2315 u32 addr_flags
= IFA_F_PERMANENT
;
2317 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2318 if (idev
->cnf
.optimistic_dad
&&
2319 !dev_net(idev
->dev
)->ipv6
.devconf_all
->forwarding
)
2320 addr_flags
|= IFA_F_OPTIMISTIC
;
2324 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, addr_flags
);
2326 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
2327 addrconf_dad_start(ifp
, 0);
2332 static void addrconf_dev_config(struct net_device
*dev
)
2334 struct in6_addr addr
;
2335 struct inet6_dev
* idev
;
2339 if ((dev
->type
!= ARPHRD_ETHER
) &&
2340 (dev
->type
!= ARPHRD_FDDI
) &&
2341 (dev
->type
!= ARPHRD_IEEE802_TR
) &&
2342 (dev
->type
!= ARPHRD_ARCNET
) &&
2343 (dev
->type
!= ARPHRD_INFINIBAND
)) {
2344 /* Alas, we support only Ethernet autoconfiguration. */
2348 idev
= addrconf_add_dev(dev
);
2352 memset(&addr
, 0, sizeof(struct in6_addr
));
2353 addr
.s6_addr32
[0] = htonl(0xFE800000);
2355 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
2356 addrconf_add_linklocal(idev
, &addr
);
2359 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2360 static void addrconf_sit_config(struct net_device
*dev
)
2362 struct inet6_dev
*idev
;
2367 * Configure the tunnel with one of our IPv4
2368 * addresses... we should configure all of
2369 * our v4 addrs in the tunnel
2372 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2373 printk(KERN_DEBUG
"init sit: add_dev failed\n");
2377 if (dev
->priv_flags
& IFF_ISATAP
) {
2378 struct in6_addr addr
;
2380 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2381 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
2382 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
))
2383 addrconf_add_linklocal(idev
, &addr
);
2387 sit_add_v4_addrs(idev
);
2389 if (dev
->flags
&IFF_POINTOPOINT
) {
2390 addrconf_add_mroute(dev
);
2391 addrconf_add_lroute(dev
);
2398 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
2400 struct in6_addr lladdr
;
2402 if (!ipv6_get_lladdr(link_dev
, &lladdr
, IFA_F_TENTATIVE
)) {
2403 addrconf_add_linklocal(idev
, &lladdr
);
2409 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
2411 struct net_device
*link_dev
;
2412 struct net
*net
= dev_net(idev
->dev
);
2414 /* first try to inherit the link-local address from the link device */
2415 if (idev
->dev
->iflink
&&
2416 (link_dev
= __dev_get_by_index(net
, idev
->dev
->iflink
))) {
2417 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2420 /* then try to inherit it from any device */
2421 for_each_netdev(net
, link_dev
) {
2422 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2425 printk(KERN_DEBUG
"init ip6-ip6: add_linklocal failed\n");
2429 * Autoconfigure tunnel with a link-local address so routing protocols,
2430 * DHCPv6, MLD etc. can be run over the virtual link
2433 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
2435 struct inet6_dev
*idev
;
2439 idev
= addrconf_add_dev(dev
);
2441 printk(KERN_DEBUG
"init ip6-ip6: add_dev failed\n");
2444 ip6_tnl_add_linklocal(idev
);
2447 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
2450 struct net_device
*dev
= (struct net_device
*) data
;
2451 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2452 int run_pending
= 0;
2456 case NETDEV_REGISTER
:
2457 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2458 idev
= ipv6_add_dev(dev
);
2460 return notifier_from_errno(-ENOMEM
);
2466 if (dev
->flags
& IFF_SLAVE
)
2469 if (event
== NETDEV_UP
) {
2470 if (!addrconf_qdisc_ok(dev
)) {
2471 /* device is not ready yet. */
2473 "ADDRCONF(NETDEV_UP): %s: "
2474 "link is not ready\n",
2479 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
)
2480 idev
= ipv6_add_dev(dev
);
2483 idev
->if_flags
|= IF_READY
;
2487 if (!addrconf_qdisc_ok(dev
)) {
2488 /* device is still not ready. */
2493 if (idev
->if_flags
& IF_READY
)
2494 /* device is already configured. */
2496 idev
->if_flags
|= IF_READY
;
2500 "ADDRCONF(NETDEV_CHANGE): %s: "
2501 "link becomes ready\n",
2507 switch (dev
->type
) {
2508 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2510 addrconf_sit_config(dev
);
2513 case ARPHRD_TUNNEL6
:
2514 addrconf_ip6_tnl_config(dev
);
2516 case ARPHRD_LOOPBACK
:
2521 addrconf_dev_config(dev
);
2527 addrconf_dad_run(idev
);
2530 * If the MTU changed during the interface down,
2531 * when the interface up, the changed MTU must be
2532 * reflected in the idev as well as routers.
2534 if (idev
->cnf
.mtu6
!= dev
->mtu
&&
2535 dev
->mtu
>= IPV6_MIN_MTU
) {
2536 rt6_mtu_change(dev
, dev
->mtu
);
2537 idev
->cnf
.mtu6
= dev
->mtu
;
2539 idev
->tstamp
= jiffies
;
2540 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2543 * If the changed mtu during down is lower than
2544 * IPV6_MIN_MTU stop IPv6 on this interface.
2546 if (dev
->mtu
< IPV6_MIN_MTU
)
2547 addrconf_ifdown(dev
, 1);
2551 case NETDEV_CHANGEMTU
:
2552 if (idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2553 rt6_mtu_change(dev
, dev
->mtu
);
2554 idev
->cnf
.mtu6
= dev
->mtu
;
2558 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2559 idev
= ipv6_add_dev(dev
);
2565 * MTU falled under IPV6_MIN_MTU.
2566 * Stop IPv6 on this interface.
2570 case NETDEV_UNREGISTER
:
2572 * Remove all addresses from this interface.
2574 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2577 case NETDEV_CHANGENAME
:
2579 snmp6_unregister_dev(idev
);
2580 addrconf_sysctl_unregister(idev
);
2581 addrconf_sysctl_register(idev
);
2582 err
= snmp6_register_dev(idev
);
2584 return notifier_from_errno(err
);
2588 case NETDEV_PRE_TYPE_CHANGE
:
2589 case NETDEV_POST_TYPE_CHANGE
:
2590 addrconf_type_change(dev
, event
);
2598 * addrconf module should be notified of a device going up
2600 static struct notifier_block ipv6_dev_notf
= {
2601 .notifier_call
= addrconf_notify
,
2604 static void addrconf_type_change(struct net_device
*dev
, unsigned long event
)
2606 struct inet6_dev
*idev
;
2609 idev
= __in6_dev_get(dev
);
2611 if (event
== NETDEV_POST_TYPE_CHANGE
)
2612 ipv6_mc_remap(idev
);
2613 else if (event
== NETDEV_PRE_TYPE_CHANGE
)
2614 ipv6_mc_unmap(idev
);
2617 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2619 struct net
*net
= dev_net(dev
);
2620 struct inet6_dev
*idev
;
2621 struct inet6_ifaddr
*ifa
;
2622 LIST_HEAD(keep_list
);
2626 rt6_ifdown(net
, dev
);
2627 neigh_ifdown(&nd_tbl
, dev
);
2629 idev
= __in6_dev_get(dev
);
2634 * Step 1: remove reference to ipv6 device from parent device.
2640 /* protected by rtnl_lock */
2641 rcu_assign_pointer(dev
->ip6_ptr
, NULL
);
2643 /* Step 1.5: remove snmp6 entry */
2644 snmp6_unregister_dev(idev
);
2648 write_lock_bh(&idev
->lock
);
2650 /* Step 2: clear flags for stateless addrconf */
2652 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
2654 #ifdef CONFIG_IPV6_PRIVACY
2655 if (how
&& del_timer(&idev
->regen_timer
))
2658 /* Step 3: clear tempaddr list */
2659 while (!list_empty(&idev
->tempaddr_list
)) {
2660 ifa
= list_first_entry(&idev
->tempaddr_list
,
2661 struct inet6_ifaddr
, tmp_list
);
2662 list_del(&ifa
->tmp_list
);
2664 write_unlock_bh(&idev
->lock
);
2665 spin_lock_bh(&ifa
->lock
);
2668 in6_ifa_put(ifa
->ifpub
);
2671 spin_unlock_bh(&ifa
->lock
);
2673 write_lock_bh(&idev
->lock
);
2677 while (!list_empty(&idev
->addr_list
)) {
2678 ifa
= list_first_entry(&idev
->addr_list
,
2679 struct inet6_ifaddr
, if_list
);
2680 addrconf_del_timer(ifa
);
2682 /* If just doing link down, and address is permanent
2683 and not link-local, then retain it. */
2685 (ifa
->flags
&IFA_F_PERMANENT
) &&
2686 !(ipv6_addr_type(&ifa
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
2687 list_move_tail(&ifa
->if_list
, &keep_list
);
2689 /* If not doing DAD on this address, just keep it. */
2690 if ((dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
)) ||
2691 idev
->cnf
.accept_dad
<= 0 ||
2692 (ifa
->flags
& IFA_F_NODAD
))
2695 /* If it was tentative already, no need to notify */
2696 if (ifa
->flags
& IFA_F_TENTATIVE
)
2699 /* Flag it for later restoration when link comes up */
2700 ifa
->flags
|= IFA_F_TENTATIVE
;
2703 list_del(&ifa
->if_list
);
2706 write_unlock_bh(&idev
->lock
);
2708 /* clear hash table */
2709 spin_lock_bh(&addrconf_hash_lock
);
2710 hlist_del_init_rcu(&ifa
->addr_lst
);
2712 spin_unlock_bh(&addrconf_hash_lock
);
2714 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
2715 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifa
);
2718 write_lock_bh(&idev
->lock
);
2721 list_splice(&keep_list
, &idev
->addr_list
);
2723 write_unlock_bh(&idev
->lock
);
2725 /* Step 5: Discard multicast list */
2727 ipv6_mc_destroy_dev(idev
);
2731 idev
->tstamp
= jiffies
;
2733 /* Last: Shot the device (if unregistered) */
2735 addrconf_sysctl_unregister(idev
);
2736 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
2737 neigh_ifdown(&nd_tbl
, dev
);
2743 static void addrconf_rs_timer(unsigned long data
)
2745 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2746 struct inet6_dev
*idev
= ifp
->idev
;
2748 read_lock(&idev
->lock
);
2749 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
))
2752 if (idev
->cnf
.forwarding
)
2755 /* Announcement received after solicitation was sent */
2756 if (idev
->if_flags
& IF_RA_RCVD
)
2759 spin_lock(&ifp
->lock
);
2760 if (ifp
->probes
++ < idev
->cnf
.rtr_solicits
) {
2761 /* The wait after the last probe can be shorter */
2762 addrconf_mod_timer(ifp
, AC_RS
,
2763 (ifp
->probes
== idev
->cnf
.rtr_solicits
) ?
2764 idev
->cnf
.rtr_solicit_delay
:
2765 idev
->cnf
.rtr_solicit_interval
);
2766 spin_unlock(&ifp
->lock
);
2768 ndisc_send_rs(idev
->dev
, &ifp
->addr
, &in6addr_linklocal_allrouters
);
2770 spin_unlock(&ifp
->lock
);
2772 * Note: we do not support deprecated "all on-link"
2773 * assumption any longer.
2775 printk(KERN_DEBUG
"%s: no IPv6 routers present\n",
2780 read_unlock(&idev
->lock
);
2785 * Duplicate Address Detection
2787 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
2789 unsigned long rand_num
;
2790 struct inet6_dev
*idev
= ifp
->idev
;
2792 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
2795 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
2797 ifp
->probes
= idev
->cnf
.dad_transmits
;
2798 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
2801 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
)
2803 struct inet6_dev
*idev
= ifp
->idev
;
2804 struct net_device
*dev
= idev
->dev
;
2806 addrconf_join_solict(dev
, &ifp
->addr
);
2808 net_srandom(ifp
->addr
.s6_addr32
[3]);
2810 read_lock_bh(&idev
->lock
);
2814 spin_lock(&ifp
->lock
);
2815 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
2816 idev
->cnf
.accept_dad
< 1 ||
2817 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
2818 ifp
->flags
& IFA_F_NODAD
) {
2819 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
2820 spin_unlock(&ifp
->lock
);
2821 read_unlock_bh(&idev
->lock
);
2823 addrconf_dad_completed(ifp
);
2827 if (!(idev
->if_flags
& IF_READY
)) {
2828 spin_unlock(&ifp
->lock
);
2829 read_unlock_bh(&idev
->lock
);
2831 * If the device is not ready:
2832 * - keep it tentative if it is a permanent address.
2833 * - otherwise, kill it.
2836 addrconf_dad_stop(ifp
, 0);
2841 * Optimistic nodes can start receiving
2844 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
2845 ip6_ins_rt(ifp
->rt
);
2847 addrconf_dad_kick(ifp
);
2848 spin_unlock(&ifp
->lock
);
2850 read_unlock_bh(&idev
->lock
);
2853 static void addrconf_dad_timer(unsigned long data
)
2855 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2856 struct inet6_dev
*idev
= ifp
->idev
;
2857 struct in6_addr mcaddr
;
2859 read_lock(&idev
->lock
);
2860 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
)) {
2861 read_unlock(&idev
->lock
);
2865 spin_lock(&ifp
->lock
);
2866 if (ifp
->probes
== 0) {
2868 * DAD was successful
2871 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
2872 spin_unlock(&ifp
->lock
);
2873 read_unlock(&idev
->lock
);
2875 addrconf_dad_completed(ifp
);
2881 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
2882 spin_unlock(&ifp
->lock
);
2883 read_unlock(&idev
->lock
);
2885 /* send a neighbour solicitation for our addr */
2886 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
2887 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &in6addr_any
);
2892 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
2894 struct net_device
*dev
= ifp
->idev
->dev
;
2897 * Configure the address for reception. Now it is valid.
2900 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2902 /* If added prefix is link local and forwarding is off,
2903 start sending router solicitations.
2906 if (ifp
->idev
->cnf
.forwarding
== 0 &&
2907 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
2908 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
2909 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
2911 * If a host as already performed a random delay
2912 * [...] as part of DAD [...] there is no need
2913 * to delay again before sending the first RS
2915 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &in6addr_linklocal_allrouters
);
2917 spin_lock_bh(&ifp
->lock
);
2919 ifp
->idev
->if_flags
|= IF_RS_SENT
;
2920 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
2921 spin_unlock_bh(&ifp
->lock
);
2925 static void addrconf_dad_run(struct inet6_dev
*idev
)
2927 struct inet6_ifaddr
*ifp
;
2929 read_lock_bh(&idev
->lock
);
2930 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
2931 spin_lock(&ifp
->lock
);
2932 if (!(ifp
->flags
& IFA_F_TENTATIVE
)) {
2933 spin_unlock(&ifp
->lock
);
2936 spin_unlock(&ifp
->lock
);
2937 addrconf_dad_kick(ifp
);
2939 read_unlock_bh(&idev
->lock
);
2942 #ifdef CONFIG_PROC_FS
2943 struct if6_iter_state
{
2944 struct seq_net_private p
;
2948 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
)
2950 struct inet6_ifaddr
*ifa
= NULL
;
2951 struct if6_iter_state
*state
= seq
->private;
2952 struct net
*net
= seq_file_net(seq
);
2954 for (state
->bucket
= 0; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
2955 struct hlist_node
*n
;
2956 hlist_for_each_entry_rcu(ifa
, n
, &inet6_addr_lst
[state
->bucket
],
2958 if (net_eq(dev_net(ifa
->idev
->dev
), net
))
2964 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
,
2965 struct inet6_ifaddr
*ifa
)
2967 struct if6_iter_state
*state
= seq
->private;
2968 struct net
*net
= seq_file_net(seq
);
2969 struct hlist_node
*n
= &ifa
->addr_lst
;
2971 hlist_for_each_entry_continue_rcu(ifa
, n
, addr_lst
)
2972 if (net_eq(dev_net(ifa
->idev
->dev
), net
))
2975 while (++state
->bucket
< IN6_ADDR_HSIZE
) {
2976 hlist_for_each_entry(ifa
, n
,
2977 &inet6_addr_lst
[state
->bucket
], addr_lst
) {
2978 if (net_eq(dev_net(ifa
->idev
->dev
), net
))
2986 static struct inet6_ifaddr
*if6_get_idx(struct seq_file
*seq
, loff_t pos
)
2988 struct inet6_ifaddr
*ifa
= if6_get_first(seq
);
2991 while (pos
&& (ifa
= if6_get_next(seq
, ifa
)) != NULL
)
2993 return pos
? NULL
: ifa
;
2996 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
3000 return if6_get_idx(seq
, *pos
);
3003 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
3005 struct inet6_ifaddr
*ifa
;
3007 ifa
= if6_get_next(seq
, v
);
3012 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
3015 rcu_read_unlock_bh();
3018 static int if6_seq_show(struct seq_file
*seq
, void *v
)
3020 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
3021 seq_printf(seq
, "%pi6 %02x %02x %02x %02x %8s\n",
3023 ifp
->idev
->dev
->ifindex
,
3027 ifp
->idev
->dev
->name
);
3031 static const struct seq_operations if6_seq_ops
= {
3032 .start
= if6_seq_start
,
3033 .next
= if6_seq_next
,
3034 .show
= if6_seq_show
,
3035 .stop
= if6_seq_stop
,
3038 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
3040 return seq_open_net(inode
, file
, &if6_seq_ops
,
3041 sizeof(struct if6_iter_state
));
3044 static const struct file_operations if6_fops
= {
3045 .owner
= THIS_MODULE
,
3046 .open
= if6_seq_open
,
3048 .llseek
= seq_lseek
,
3049 .release
= seq_release_net
,
3052 static int __net_init
if6_proc_net_init(struct net
*net
)
3054 if (!proc_net_fops_create(net
, "if_inet6", S_IRUGO
, &if6_fops
))
3059 static void __net_exit
if6_proc_net_exit(struct net
*net
)
3061 proc_net_remove(net
, "if_inet6");
3064 static struct pernet_operations if6_proc_net_ops
= {
3065 .init
= if6_proc_net_init
,
3066 .exit
= if6_proc_net_exit
,
3069 int __init
if6_proc_init(void)
3071 return register_pernet_subsys(&if6_proc_net_ops
);
3074 void if6_proc_exit(void)
3076 unregister_pernet_subsys(&if6_proc_net_ops
);
3078 #endif /* CONFIG_PROC_FS */
3080 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3081 /* Check if address is a home address configured on any interface. */
3082 int ipv6_chk_home_addr(struct net
*net
, struct in6_addr
*addr
)
3085 struct inet6_ifaddr
*ifp
= NULL
;
3086 struct hlist_node
*n
;
3087 unsigned int hash
= ipv6_addr_hash(addr
);
3090 hlist_for_each_entry_rcu(ifp
, n
, &inet6_addr_lst
[hash
], addr_lst
) {
3091 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
3093 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
3094 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
3099 rcu_read_unlock_bh();
3105 * Periodic address status verification
3108 static void addrconf_verify(unsigned long foo
)
3110 struct inet6_ifaddr
*ifp
;
3111 struct hlist_node
*node
;
3112 unsigned long now
, next
;
3116 spin_lock(&addrconf_verify_lock
);
3118 next
= now
+ ADDR_CHECK_FREQUENCY
;
3120 del_timer(&addr_chk_timer
);
3122 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
3124 hlist_for_each_entry_rcu(ifp
, node
,
3125 &inet6_addr_lst
[i
], addr_lst
) {
3128 if (ifp
->flags
& IFA_F_PERMANENT
)
3131 spin_lock(&ifp
->lock
);
3132 age
= (now
- ifp
->tstamp
) / HZ
;
3134 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
3135 age
>= ifp
->valid_lft
) {
3136 spin_unlock(&ifp
->lock
);
3140 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
3141 spin_unlock(&ifp
->lock
);
3143 } else if (age
>= ifp
->prefered_lft
) {
3144 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
3147 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
3149 ifp
->flags
|= IFA_F_DEPRECATED
;
3152 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
3153 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
3155 spin_unlock(&ifp
->lock
);
3160 ipv6_ifa_notify(0, ifp
);
3164 #ifdef CONFIG_IPV6_PRIVACY
3165 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
3166 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
3167 unsigned long regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
3168 ifp
->idev
->cnf
.dad_transmits
*
3169 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
3171 if (age
>= ifp
->prefered_lft
- regen_advance
) {
3172 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
3173 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3174 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3175 if (!ifp
->regen_count
&& ifpub
) {
3178 in6_ifa_hold(ifpub
);
3179 spin_unlock(&ifp
->lock
);
3181 spin_lock(&ifpub
->lock
);
3182 ifpub
->regen_count
= 0;
3183 spin_unlock(&ifpub
->lock
);
3184 ipv6_create_tempaddr(ifpub
, ifp
);
3189 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
3190 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
3191 spin_unlock(&ifp
->lock
);
3194 /* ifp->prefered_lft <= ifp->valid_lft */
3195 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3196 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3197 spin_unlock(&ifp
->lock
);
3202 addr_chk_timer
.expires
= time_before(next
, jiffies
+ HZ
) ? jiffies
+ HZ
: next
;
3203 add_timer(&addr_chk_timer
);
3204 spin_unlock(&addrconf_verify_lock
);
3205 rcu_read_unlock_bh();
3208 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
)
3210 struct in6_addr
*pfx
= NULL
;
3213 pfx
= nla_data(addr
);
3216 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
3219 pfx
= nla_data(local
);
3225 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
3226 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
3227 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
3228 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
3232 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3234 struct net
*net
= sock_net(skb
->sk
);
3235 struct ifaddrmsg
*ifm
;
3236 struct nlattr
*tb
[IFA_MAX
+1];
3237 struct in6_addr
*pfx
;
3240 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3244 ifm
= nlmsg_data(nlh
);
3245 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3249 return inet6_addr_del(net
, ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
3252 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u8 ifa_flags
,
3253 u32 prefered_lft
, u32 valid_lft
)
3257 unsigned long timeout
;
3259 if (!valid_lft
|| (prefered_lft
> valid_lft
))
3262 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
3263 if (addrconf_finite_timeout(timeout
)) {
3264 expires
= jiffies_to_clock_t(timeout
* HZ
);
3265 valid_lft
= timeout
;
3266 flags
= RTF_EXPIRES
;
3270 ifa_flags
|= IFA_F_PERMANENT
;
3273 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
3274 if (addrconf_finite_timeout(timeout
)) {
3276 ifa_flags
|= IFA_F_DEPRECATED
;
3277 prefered_lft
= timeout
;
3280 spin_lock_bh(&ifp
->lock
);
3281 ifp
->flags
= (ifp
->flags
& ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
| IFA_F_HOMEADDRESS
)) | ifa_flags
;
3282 ifp
->tstamp
= jiffies
;
3283 ifp
->valid_lft
= valid_lft
;
3284 ifp
->prefered_lft
= prefered_lft
;
3286 spin_unlock_bh(&ifp
->lock
);
3287 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
3288 ipv6_ifa_notify(0, ifp
);
3290 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
3298 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3300 struct net
*net
= sock_net(skb
->sk
);
3301 struct ifaddrmsg
*ifm
;
3302 struct nlattr
*tb
[IFA_MAX
+1];
3303 struct in6_addr
*pfx
;
3304 struct inet6_ifaddr
*ifa
;
3305 struct net_device
*dev
;
3306 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
3310 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3314 ifm
= nlmsg_data(nlh
);
3315 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3319 if (tb
[IFA_CACHEINFO
]) {
3320 struct ifa_cacheinfo
*ci
;
3322 ci
= nla_data(tb
[IFA_CACHEINFO
]);
3323 valid_lft
= ci
->ifa_valid
;
3324 preferred_lft
= ci
->ifa_prefered
;
3326 preferred_lft
= INFINITY_LIFE_TIME
;
3327 valid_lft
= INFINITY_LIFE_TIME
;
3330 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3334 /* We ignore other flags so far. */
3335 ifa_flags
= ifm
->ifa_flags
& (IFA_F_NODAD
| IFA_F_HOMEADDRESS
);
3337 ifa
= ipv6_get_ifaddr(net
, pfx
, dev
, 1);
3340 * It would be best to check for !NLM_F_CREATE here but
3341 * userspace alreay relies on not having to provide this.
3343 return inet6_addr_add(net
, ifm
->ifa_index
, pfx
,
3344 ifm
->ifa_prefixlen
, ifa_flags
,
3345 preferred_lft
, valid_lft
);
3348 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
3349 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
3352 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
3359 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u8 flags
,
3360 u8 scope
, int ifindex
)
3362 struct ifaddrmsg
*ifm
;
3364 ifm
= nlmsg_data(nlh
);
3365 ifm
->ifa_family
= AF_INET6
;
3366 ifm
->ifa_prefixlen
= prefixlen
;
3367 ifm
->ifa_flags
= flags
;
3368 ifm
->ifa_scope
= scope
;
3369 ifm
->ifa_index
= ifindex
;
3372 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
3373 unsigned long tstamp
, u32 preferred
, u32 valid
)
3375 struct ifa_cacheinfo ci
;
3377 ci
.cstamp
= (u32
)(TIME_DELTA(cstamp
, INITIAL_JIFFIES
) / HZ
* 100
3378 + TIME_DELTA(cstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3379 ci
.tstamp
= (u32
)(TIME_DELTA(tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3380 + TIME_DELTA(tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3381 ci
.ifa_prefered
= preferred
;
3382 ci
.ifa_valid
= valid
;
3384 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
3387 static inline int rt_scope(int ifa_scope
)
3389 if (ifa_scope
& IFA_HOST
)
3390 return RT_SCOPE_HOST
;
3391 else if (ifa_scope
& IFA_LINK
)
3392 return RT_SCOPE_LINK
;
3393 else if (ifa_scope
& IFA_SITE
)
3394 return RT_SCOPE_SITE
;
3396 return RT_SCOPE_UNIVERSE
;
3399 static inline int inet6_ifaddr_msgsize(void)
3401 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
3402 + nla_total_size(16) /* IFA_ADDRESS */
3403 + nla_total_size(sizeof(struct ifa_cacheinfo
));
3406 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
3407 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3409 struct nlmsghdr
*nlh
;
3410 u32 preferred
, valid
;
3412 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3416 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
3417 ifa
->idev
->dev
->ifindex
);
3419 if (!(ifa
->flags
&IFA_F_PERMANENT
)) {
3420 preferred
= ifa
->prefered_lft
;
3421 valid
= ifa
->valid_lft
;
3422 if (preferred
!= INFINITY_LIFE_TIME
) {
3423 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
3424 if (preferred
> tval
)
3428 if (valid
!= INFINITY_LIFE_TIME
)
3432 preferred
= INFINITY_LIFE_TIME
;
3433 valid
= INFINITY_LIFE_TIME
;
3436 if (nla_put(skb
, IFA_ADDRESS
, 16, &ifa
->addr
) < 0 ||
3437 put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0) {
3438 nlmsg_cancel(skb
, nlh
);
3442 return nlmsg_end(skb
, nlh
);
3445 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
3446 u32 pid
, u32 seq
, int event
, u16 flags
)
3448 struct nlmsghdr
*nlh
;
3449 u8 scope
= RT_SCOPE_UNIVERSE
;
3450 int ifindex
= ifmca
->idev
->dev
->ifindex
;
3452 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
3453 scope
= RT_SCOPE_SITE
;
3455 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3459 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3460 if (nla_put(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
) < 0 ||
3461 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
3462 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3463 nlmsg_cancel(skb
, nlh
);
3467 return nlmsg_end(skb
, nlh
);
3470 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
3471 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3473 struct nlmsghdr
*nlh
;
3474 u8 scope
= RT_SCOPE_UNIVERSE
;
3475 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
3477 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
3478 scope
= RT_SCOPE_SITE
;
3480 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3484 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3485 if (nla_put(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
) < 0 ||
3486 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
3487 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3488 nlmsg_cancel(skb
, nlh
);
3492 return nlmsg_end(skb
, nlh
);
3501 /* called with rcu_read_lock() */
3502 static int in6_dump_addrs(struct inet6_dev
*idev
, struct sk_buff
*skb
,
3503 struct netlink_callback
*cb
, enum addr_type_t type
,
3504 int s_ip_idx
, int *p_ip_idx
)
3506 struct ifmcaddr6
*ifmca
;
3507 struct ifacaddr6
*ifaca
;
3509 int ip_idx
= *p_ip_idx
;
3511 read_lock_bh(&idev
->lock
);
3513 case UNICAST_ADDR
: {
3514 struct inet6_ifaddr
*ifa
;
3516 /* unicast address incl. temp addr */
3517 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
3518 if (++ip_idx
< s_ip_idx
)
3520 err
= inet6_fill_ifaddr(skb
, ifa
,
3521 NETLINK_CB(cb
->skb
).pid
,
3530 case MULTICAST_ADDR
:
3531 /* multicast address */
3532 for (ifmca
= idev
->mc_list
; ifmca
;
3533 ifmca
= ifmca
->next
, ip_idx
++) {
3534 if (ip_idx
< s_ip_idx
)
3536 err
= inet6_fill_ifmcaddr(skb
, ifmca
,
3537 NETLINK_CB(cb
->skb
).pid
,
3546 /* anycast address */
3547 for (ifaca
= idev
->ac_list
; ifaca
;
3548 ifaca
= ifaca
->aca_next
, ip_idx
++) {
3549 if (ip_idx
< s_ip_idx
)
3551 err
= inet6_fill_ifacaddr(skb
, ifaca
,
3552 NETLINK_CB(cb
->skb
).pid
,
3563 read_unlock_bh(&idev
->lock
);
3568 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3569 enum addr_type_t type
)
3571 struct net
*net
= sock_net(skb
->sk
);
3574 int s_idx
, s_ip_idx
;
3575 struct net_device
*dev
;
3576 struct inet6_dev
*idev
;
3577 struct hlist_head
*head
;
3578 struct hlist_node
*node
;
3581 s_idx
= idx
= cb
->args
[1];
3582 s_ip_idx
= ip_idx
= cb
->args
[2];
3585 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
3587 head
= &net
->dev_index_head
[h
];
3588 hlist_for_each_entry_rcu(dev
, node
, head
, index_hlist
) {
3594 idev
= __in6_dev_get(dev
);
3598 if (in6_dump_addrs(idev
, skb
, cb
, type
,
3599 s_ip_idx
, &ip_idx
) <= 0)
3609 cb
->args
[2] = ip_idx
;
3614 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3616 enum addr_type_t type
= UNICAST_ADDR
;
3618 return inet6_dump_addr(skb
, cb
, type
);
3621 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3623 enum addr_type_t type
= MULTICAST_ADDR
;
3625 return inet6_dump_addr(skb
, cb
, type
);
3629 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3631 enum addr_type_t type
= ANYCAST_ADDR
;
3633 return inet6_dump_addr(skb
, cb
, type
);
3636 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
* nlh
,
3639 struct net
*net
= sock_net(in_skb
->sk
);
3640 struct ifaddrmsg
*ifm
;
3641 struct nlattr
*tb
[IFA_MAX
+1];
3642 struct in6_addr
*addr
= NULL
;
3643 struct net_device
*dev
= NULL
;
3644 struct inet6_ifaddr
*ifa
;
3645 struct sk_buff
*skb
;
3648 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3652 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3658 ifm
= nlmsg_data(nlh
);
3660 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3662 ifa
= ipv6_get_ifaddr(net
, addr
, dev
, 1);
3664 err
= -EADDRNOTAVAIL
;
3668 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
);
3674 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).pid
,
3675 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
3677 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3678 WARN_ON(err
== -EMSGSIZE
);
3682 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).pid
);
3689 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
3691 struct sk_buff
*skb
;
3692 struct net
*net
= dev_net(ifa
->idev
->dev
);
3695 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
3699 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
3701 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3702 WARN_ON(err
== -EMSGSIZE
);
3706 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3710 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
3713 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
3714 __s32
*array
, int bytes
)
3716 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
3718 memset(array
, 0, bytes
);
3719 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
3720 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
3721 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
3722 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
3723 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
3724 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
3725 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
3726 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
3727 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] = cnf
->rtr_solicit_interval
;
3728 array
[DEVCONF_RTR_SOLICIT_DELAY
] = cnf
->rtr_solicit_delay
;
3729 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
3730 #ifdef CONFIG_IPV6_PRIVACY
3731 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
3732 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
3733 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
3734 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
3735 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
3737 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
3738 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
3739 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
3740 #ifdef CONFIG_IPV6_ROUTER_PREF
3741 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
3742 array
[DEVCONF_RTR_PROBE_INTERVAL
] = cnf
->rtr_probe_interval
;
3743 #ifdef CONFIG_IPV6_ROUTE_INFO
3744 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
3747 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
3748 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
3749 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3750 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
3752 #ifdef CONFIG_IPV6_MROUTE
3753 array
[DEVCONF_MC_FORWARDING
] = cnf
->mc_forwarding
;
3755 array
[DEVCONF_DISABLE_IPV6
] = cnf
->disable_ipv6
;
3756 array
[DEVCONF_ACCEPT_DAD
] = cnf
->accept_dad
;
3757 array
[DEVCONF_FORCE_TLLAO
] = cnf
->force_tllao
;
3760 static inline size_t inet6_if_nlmsg_size(void)
3762 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
3763 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
3764 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
3765 + nla_total_size(4) /* IFLA_MTU */
3766 + nla_total_size(4) /* IFLA_LINK */
3767 + nla_total_size( /* IFLA_PROTINFO */
3768 nla_total_size(4) /* IFLA_INET6_FLAGS */
3769 + nla_total_size(sizeof(struct ifla_cacheinfo
))
3770 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
3771 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
3772 + nla_total_size(ICMP6_MIB_MAX
* 8) /* IFLA_INET6_ICMP6STATS */
3776 static inline void __snmp6_fill_stats(u64
*stats
, void __percpu
**mib
,
3777 int items
, int bytes
)
3780 int pad
= bytes
- sizeof(u64
) * items
;
3783 /* Use put_unaligned() because stats may not be aligned for u64. */
3784 put_unaligned(items
, &stats
[0]);
3785 for (i
= 1; i
< items
; i
++)
3786 put_unaligned(snmp_fold_field(mib
, i
), &stats
[i
]);
3788 memset(&stats
[items
], 0, pad
);
3791 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
3795 case IFLA_INET6_STATS
:
3796 __snmp6_fill_stats(stats
, (void __percpu
**)idev
->stats
.ipv6
, IPSTATS_MIB_MAX
, bytes
);
3798 case IFLA_INET6_ICMP6STATS
:
3799 __snmp6_fill_stats(stats
, (void __percpu
**)idev
->stats
.icmpv6
, ICMP6_MIB_MAX
, bytes
);
3804 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3805 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3807 struct net_device
*dev
= idev
->dev
;
3809 struct ifinfomsg
*hdr
;
3810 struct nlmsghdr
*nlh
;
3812 struct ifla_cacheinfo ci
;
3814 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*hdr
), flags
);
3818 hdr
= nlmsg_data(nlh
);
3819 hdr
->ifi_family
= AF_INET6
;
3821 hdr
->ifi_type
= dev
->type
;
3822 hdr
->ifi_index
= dev
->ifindex
;
3823 hdr
->ifi_flags
= dev_get_flags(dev
);
3824 hdr
->ifi_change
= 0;
3826 NLA_PUT_STRING(skb
, IFLA_IFNAME
, dev
->name
);
3829 NLA_PUT(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
);
3831 NLA_PUT_U32(skb
, IFLA_MTU
, dev
->mtu
);
3832 if (dev
->ifindex
!= dev
->iflink
)
3833 NLA_PUT_U32(skb
, IFLA_LINK
, dev
->iflink
);
3835 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
3836 if (protoinfo
== NULL
)
3837 goto nla_put_failure
;
3839 NLA_PUT_U32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
);
3841 ci
.max_reasm_len
= IPV6_MAXPLEN
;
3842 ci
.tstamp
= (__u32
)(TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3843 + TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3844 ci
.reachable_time
= idev
->nd_parms
->reachable_time
;
3845 ci
.retrans_time
= idev
->nd_parms
->retrans_time
;
3846 NLA_PUT(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
);
3848 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
3850 goto nla_put_failure
;
3851 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
3853 /* XXX - MC not implemented */
3855 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
3857 goto nla_put_failure
;
3858 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
3860 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
3862 goto nla_put_failure
;
3863 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
3865 nla_nest_end(skb
, protoinfo
);
3866 return nlmsg_end(skb
, nlh
);
3869 nlmsg_cancel(skb
, nlh
);
3873 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3875 struct net
*net
= sock_net(skb
->sk
);
3878 struct net_device
*dev
;
3879 struct inet6_dev
*idev
;
3880 struct hlist_head
*head
;
3881 struct hlist_node
*node
;
3884 s_idx
= cb
->args
[1];
3887 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
3889 head
= &net
->dev_index_head
[h
];
3890 hlist_for_each_entry_rcu(dev
, node
, head
, index_hlist
) {
3893 idev
= __in6_dev_get(dev
);
3896 if (inet6_fill_ifinfo(skb
, idev
,
3897 NETLINK_CB(cb
->skb
).pid
,
3899 RTM_NEWLINK
, NLM_F_MULTI
) <= 0)
3913 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
3915 struct sk_buff
*skb
;
3916 struct net
*net
= dev_net(idev
->dev
);
3919 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
3923 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
3925 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3926 WARN_ON(err
== -EMSGSIZE
);
3930 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3934 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
3937 static inline size_t inet6_prefix_nlmsg_size(void)
3939 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
3940 + nla_total_size(sizeof(struct in6_addr
))
3941 + nla_total_size(sizeof(struct prefix_cacheinfo
));
3944 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3945 struct prefix_info
*pinfo
, u32 pid
, u32 seq
,
3946 int event
, unsigned int flags
)
3948 struct prefixmsg
*pmsg
;
3949 struct nlmsghdr
*nlh
;
3950 struct prefix_cacheinfo ci
;
3952 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*pmsg
), flags
);
3956 pmsg
= nlmsg_data(nlh
);
3957 pmsg
->prefix_family
= AF_INET6
;
3958 pmsg
->prefix_pad1
= 0;
3959 pmsg
->prefix_pad2
= 0;
3960 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
3961 pmsg
->prefix_len
= pinfo
->prefix_len
;
3962 pmsg
->prefix_type
= pinfo
->type
;
3963 pmsg
->prefix_pad3
= 0;
3964 pmsg
->prefix_flags
= 0;
3966 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
3967 if (pinfo
->autoconf
)
3968 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
3970 NLA_PUT(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
);
3972 ci
.preferred_time
= ntohl(pinfo
->prefered
);
3973 ci
.valid_time
= ntohl(pinfo
->valid
);
3974 NLA_PUT(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
);
3976 return nlmsg_end(skb
, nlh
);
3979 nlmsg_cancel(skb
, nlh
);
3983 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
3984 struct prefix_info
*pinfo
)
3986 struct sk_buff
*skb
;
3987 struct net
*net
= dev_net(idev
->dev
);
3990 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
3994 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
3996 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3997 WARN_ON(err
== -EMSGSIZE
);
4001 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
4005 rtnl_set_sk_err(net
, RTNLGRP_IPV6_PREFIX
, err
);
4008 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
4010 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
4015 * If the address was optimistic
4016 * we inserted the route at the start of
4017 * our DAD process, so we don't need
4020 if (!(ifp
->rt
->rt6i_node
))
4021 ip6_ins_rt(ifp
->rt
);
4022 if (ifp
->idev
->cnf
.forwarding
)
4023 addrconf_join_anycast(ifp
);
4026 if (ifp
->idev
->cnf
.forwarding
)
4027 addrconf_leave_anycast(ifp
);
4028 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
4029 dst_hold(&ifp
->rt
->u
.dst
);
4030 if (ip6_del_rt(ifp
->rt
))
4031 dst_free(&ifp
->rt
->u
.dst
);
4036 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
4039 if (likely(ifp
->idev
->dead
== 0))
4040 __ipv6_ifa_notify(event
, ifp
);
4041 rcu_read_unlock_bh();
4044 #ifdef CONFIG_SYSCTL
4047 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
,
4048 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4050 int *valp
= ctl
->data
;
4055 ret
= proc_dointvec(ctl
, write
, buffer
, lenp
, ppos
);
4058 ret
= addrconf_fixup_forwarding(ctl
, valp
, val
);
4064 static void dev_disable_change(struct inet6_dev
*idev
)
4066 if (!idev
|| !idev
->dev
)
4069 if (idev
->cnf
.disable_ipv6
)
4070 addrconf_notify(NULL
, NETDEV_DOWN
, idev
->dev
);
4072 addrconf_notify(NULL
, NETDEV_UP
, idev
->dev
);
4075 static void addrconf_disable_change(struct net
*net
, __s32 newf
)
4077 struct net_device
*dev
;
4078 struct inet6_dev
*idev
;
4081 for_each_netdev_rcu(net
, dev
) {
4082 idev
= __in6_dev_get(dev
);
4084 int changed
= (!idev
->cnf
.disable_ipv6
) ^ (!newf
);
4085 idev
->cnf
.disable_ipv6
= newf
;
4087 dev_disable_change(idev
);
4093 static int addrconf_disable_ipv6(struct ctl_table
*table
, int *p
, int old
)
4097 net
= (struct net
*)table
->extra2
;
4099 if (p
== &net
->ipv6
.devconf_dflt
->disable_ipv6
)
4102 if (!rtnl_trylock()) {
4103 /* Restore the original values before restarting */
4105 return restart_syscall();
4108 if (p
== &net
->ipv6
.devconf_all
->disable_ipv6
) {
4109 __s32 newf
= net
->ipv6
.devconf_all
->disable_ipv6
;
4110 net
->ipv6
.devconf_dflt
->disable_ipv6
= newf
;
4111 addrconf_disable_change(net
, newf
);
4112 } else if ((!*p
) ^ (!old
))
4113 dev_disable_change((struct inet6_dev
*)table
->extra1
);
4120 int addrconf_sysctl_disable(ctl_table
*ctl
, int write
,
4121 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4123 int *valp
= ctl
->data
;
4128 ret
= proc_dointvec(ctl
, write
, buffer
, lenp
, ppos
);
4131 ret
= addrconf_disable_ipv6(ctl
, valp
, val
);
4137 static struct addrconf_sysctl_table
4139 struct ctl_table_header
*sysctl_header
;
4140 ctl_table addrconf_vars
[DEVCONF_MAX
+1];
4142 } addrconf_sysctl __read_mostly
= {
4143 .sysctl_header
= NULL
,
4146 .procname
= "forwarding",
4147 .data
= &ipv6_devconf
.forwarding
,
4148 .maxlen
= sizeof(int),
4150 .proc_handler
= addrconf_sysctl_forward
,
4153 .procname
= "hop_limit",
4154 .data
= &ipv6_devconf
.hop_limit
,
4155 .maxlen
= sizeof(int),
4157 .proc_handler
= proc_dointvec
,
4161 .data
= &ipv6_devconf
.mtu6
,
4162 .maxlen
= sizeof(int),
4164 .proc_handler
= proc_dointvec
,
4167 .procname
= "accept_ra",
4168 .data
= &ipv6_devconf
.accept_ra
,
4169 .maxlen
= sizeof(int),
4171 .proc_handler
= proc_dointvec
,
4174 .procname
= "accept_redirects",
4175 .data
= &ipv6_devconf
.accept_redirects
,
4176 .maxlen
= sizeof(int),
4178 .proc_handler
= proc_dointvec
,
4181 .procname
= "autoconf",
4182 .data
= &ipv6_devconf
.autoconf
,
4183 .maxlen
= sizeof(int),
4185 .proc_handler
= proc_dointvec
,
4188 .procname
= "dad_transmits",
4189 .data
= &ipv6_devconf
.dad_transmits
,
4190 .maxlen
= sizeof(int),
4192 .proc_handler
= proc_dointvec
,
4195 .procname
= "router_solicitations",
4196 .data
= &ipv6_devconf
.rtr_solicits
,
4197 .maxlen
= sizeof(int),
4199 .proc_handler
= proc_dointvec
,
4202 .procname
= "router_solicitation_interval",
4203 .data
= &ipv6_devconf
.rtr_solicit_interval
,
4204 .maxlen
= sizeof(int),
4206 .proc_handler
= proc_dointvec_jiffies
,
4209 .procname
= "router_solicitation_delay",
4210 .data
= &ipv6_devconf
.rtr_solicit_delay
,
4211 .maxlen
= sizeof(int),
4213 .proc_handler
= proc_dointvec_jiffies
,
4216 .procname
= "force_mld_version",
4217 .data
= &ipv6_devconf
.force_mld_version
,
4218 .maxlen
= sizeof(int),
4220 .proc_handler
= proc_dointvec
,
4222 #ifdef CONFIG_IPV6_PRIVACY
4224 .procname
= "use_tempaddr",
4225 .data
= &ipv6_devconf
.use_tempaddr
,
4226 .maxlen
= sizeof(int),
4228 .proc_handler
= proc_dointvec
,
4231 .procname
= "temp_valid_lft",
4232 .data
= &ipv6_devconf
.temp_valid_lft
,
4233 .maxlen
= sizeof(int),
4235 .proc_handler
= proc_dointvec
,
4238 .procname
= "temp_prefered_lft",
4239 .data
= &ipv6_devconf
.temp_prefered_lft
,
4240 .maxlen
= sizeof(int),
4242 .proc_handler
= proc_dointvec
,
4245 .procname
= "regen_max_retry",
4246 .data
= &ipv6_devconf
.regen_max_retry
,
4247 .maxlen
= sizeof(int),
4249 .proc_handler
= proc_dointvec
,
4252 .procname
= "max_desync_factor",
4253 .data
= &ipv6_devconf
.max_desync_factor
,
4254 .maxlen
= sizeof(int),
4256 .proc_handler
= proc_dointvec
,
4260 .procname
= "max_addresses",
4261 .data
= &ipv6_devconf
.max_addresses
,
4262 .maxlen
= sizeof(int),
4264 .proc_handler
= proc_dointvec
,
4267 .procname
= "accept_ra_defrtr",
4268 .data
= &ipv6_devconf
.accept_ra_defrtr
,
4269 .maxlen
= sizeof(int),
4271 .proc_handler
= proc_dointvec
,
4274 .procname
= "accept_ra_pinfo",
4275 .data
= &ipv6_devconf
.accept_ra_pinfo
,
4276 .maxlen
= sizeof(int),
4278 .proc_handler
= proc_dointvec
,
4280 #ifdef CONFIG_IPV6_ROUTER_PREF
4282 .procname
= "accept_ra_rtr_pref",
4283 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
4284 .maxlen
= sizeof(int),
4286 .proc_handler
= proc_dointvec
,
4289 .procname
= "router_probe_interval",
4290 .data
= &ipv6_devconf
.rtr_probe_interval
,
4291 .maxlen
= sizeof(int),
4293 .proc_handler
= proc_dointvec_jiffies
,
4295 #ifdef CONFIG_IPV6_ROUTE_INFO
4297 .procname
= "accept_ra_rt_info_max_plen",
4298 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
4299 .maxlen
= sizeof(int),
4301 .proc_handler
= proc_dointvec
,
4306 .procname
= "proxy_ndp",
4307 .data
= &ipv6_devconf
.proxy_ndp
,
4308 .maxlen
= sizeof(int),
4310 .proc_handler
= proc_dointvec
,
4313 .procname
= "accept_source_route",
4314 .data
= &ipv6_devconf
.accept_source_route
,
4315 .maxlen
= sizeof(int),
4317 .proc_handler
= proc_dointvec
,
4319 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4321 .procname
= "optimistic_dad",
4322 .data
= &ipv6_devconf
.optimistic_dad
,
4323 .maxlen
= sizeof(int),
4325 .proc_handler
= proc_dointvec
,
4329 #ifdef CONFIG_IPV6_MROUTE
4331 .procname
= "mc_forwarding",
4332 .data
= &ipv6_devconf
.mc_forwarding
,
4333 .maxlen
= sizeof(int),
4335 .proc_handler
= proc_dointvec
,
4339 .procname
= "disable_ipv6",
4340 .data
= &ipv6_devconf
.disable_ipv6
,
4341 .maxlen
= sizeof(int),
4343 .proc_handler
= addrconf_sysctl_disable
,
4346 .procname
= "accept_dad",
4347 .data
= &ipv6_devconf
.accept_dad
,
4348 .maxlen
= sizeof(int),
4350 .proc_handler
= proc_dointvec
,
4353 .procname
= "force_tllao",
4354 .data
= &ipv6_devconf
.force_tllao
,
4355 .maxlen
= sizeof(int),
4357 .proc_handler
= proc_dointvec
4365 static int __addrconf_sysctl_register(struct net
*net
, char *dev_name
,
4366 struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
4369 struct addrconf_sysctl_table
*t
;
4371 #define ADDRCONF_CTL_PATH_DEV 3
4373 struct ctl_path addrconf_ctl_path
[] = {
4374 { .procname
= "net", },
4375 { .procname
= "ipv6", },
4376 { .procname
= "conf", },
4377 { /* to be set */ },
4382 t
= kmemdup(&addrconf_sysctl
, sizeof(*t
), GFP_KERNEL
);
4386 for (i
= 0; t
->addrconf_vars
[i
].data
; i
++) {
4387 t
->addrconf_vars
[i
].data
+= (char *)p
- (char *)&ipv6_devconf
;
4388 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
4389 t
->addrconf_vars
[i
].extra2
= net
;
4393 * Make a copy of dev_name, because '.procname' is regarded as const
4394 * by sysctl and we wouldn't want anyone to change it under our feet
4395 * (see SIOCSIFNAME).
4397 t
->dev_name
= kstrdup(dev_name
, GFP_KERNEL
);
4401 addrconf_ctl_path
[ADDRCONF_CTL_PATH_DEV
].procname
= t
->dev_name
;
4403 t
->sysctl_header
= register_net_sysctl_table(net
, addrconf_ctl_path
,
4405 if (t
->sysctl_header
== NULL
)
4419 static void __addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
4421 struct addrconf_sysctl_table
*t
;
4423 if (p
->sysctl
== NULL
)
4428 unregister_sysctl_table(t
->sysctl_header
);
4433 static void addrconf_sysctl_register(struct inet6_dev
*idev
)
4435 neigh_sysctl_register(idev
->dev
, idev
->nd_parms
, "ipv6",
4436 &ndisc_ifinfo_sysctl_change
);
4437 __addrconf_sysctl_register(dev_net(idev
->dev
), idev
->dev
->name
,
4441 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
4443 __addrconf_sysctl_unregister(&idev
->cnf
);
4444 neigh_sysctl_unregister(idev
->nd_parms
);
4450 static int __net_init
addrconf_init_net(struct net
*net
)
4453 struct ipv6_devconf
*all
, *dflt
;
4456 all
= &ipv6_devconf
;
4457 dflt
= &ipv6_devconf_dflt
;
4459 if (!net_eq(net
, &init_net
)) {
4460 all
= kmemdup(all
, sizeof(ipv6_devconf
), GFP_KERNEL
);
4464 dflt
= kmemdup(dflt
, sizeof(ipv6_devconf_dflt
), GFP_KERNEL
);
4466 goto err_alloc_dflt
;
4468 /* these will be inherited by all namespaces */
4469 dflt
->autoconf
= ipv6_defaults
.autoconf
;
4470 dflt
->disable_ipv6
= ipv6_defaults
.disable_ipv6
;
4473 net
->ipv6
.devconf_all
= all
;
4474 net
->ipv6
.devconf_dflt
= dflt
;
4476 #ifdef CONFIG_SYSCTL
4477 err
= __addrconf_sysctl_register(net
, "all", NULL
, all
);
4481 err
= __addrconf_sysctl_register(net
, "default", NULL
, dflt
);
4487 #ifdef CONFIG_SYSCTL
4489 __addrconf_sysctl_unregister(all
);
4499 static void __net_exit
addrconf_exit_net(struct net
*net
)
4501 #ifdef CONFIG_SYSCTL
4502 __addrconf_sysctl_unregister(net
->ipv6
.devconf_dflt
);
4503 __addrconf_sysctl_unregister(net
->ipv6
.devconf_all
);
4505 if (!net_eq(net
, &init_net
)) {
4506 kfree(net
->ipv6
.devconf_dflt
);
4507 kfree(net
->ipv6
.devconf_all
);
4511 static struct pernet_operations addrconf_ops
= {
4512 .init
= addrconf_init_net
,
4513 .exit
= addrconf_exit_net
,
4520 int register_inet6addr_notifier(struct notifier_block
*nb
)
4522 return atomic_notifier_chain_register(&inet6addr_chain
, nb
);
4524 EXPORT_SYMBOL(register_inet6addr_notifier
);
4526 int unregister_inet6addr_notifier(struct notifier_block
*nb
)
4528 return atomic_notifier_chain_unregister(&inet6addr_chain
, nb
);
4530 EXPORT_SYMBOL(unregister_inet6addr_notifier
);
4533 * Init / cleanup code
4536 int __init
addrconf_init(void)
4540 err
= ipv6_addr_label_init();
4542 printk(KERN_CRIT
"IPv6 Addrconf:"
4543 " cannot initialize default policy table: %d.\n", err
);
4547 register_pernet_subsys(&addrconf_ops
);
4549 /* The addrconf netdev notifier requires that loopback_dev
4550 * has it's ipv6 private information allocated and setup
4551 * before it can bring up and give link-local addresses
4552 * to other devices which are up.
4554 * Unfortunately, loopback_dev is not necessarily the first
4555 * entry in the global dev_base list of net devices. In fact,
4556 * it is likely to be the very last entry on that list.
4557 * So this causes the notifier registry below to try and
4558 * give link-local addresses to all devices besides loopback_dev
4559 * first, then loopback_dev, which cases all the non-loopback_dev
4560 * devices to fail to get a link-local address.
4562 * So, as a temporary fix, allocate the ipv6 structure for
4563 * loopback_dev first by hand.
4564 * Longer term, all of the dependencies ipv6 has upon the loopback
4565 * device and it being up should be removed.
4568 if (!ipv6_add_dev(init_net
.loopback_dev
))
4574 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
4575 INIT_HLIST_HEAD(&inet6_addr_lst
[i
]);
4577 register_netdevice_notifier(&ipv6_dev_notf
);
4581 err
= __rtnl_register(PF_INET6
, RTM_GETLINK
, NULL
, inet6_dump_ifinfo
);
4585 /* Only the first call to __rtnl_register can fail */
4586 __rtnl_register(PF_INET6
, RTM_NEWADDR
, inet6_rtm_newaddr
, NULL
);
4587 __rtnl_register(PF_INET6
, RTM_DELADDR
, inet6_rtm_deladdr
, NULL
);
4588 __rtnl_register(PF_INET6
, RTM_GETADDR
, inet6_rtm_getaddr
, inet6_dump_ifaddr
);
4589 __rtnl_register(PF_INET6
, RTM_GETMULTICAST
, NULL
, inet6_dump_ifmcaddr
);
4590 __rtnl_register(PF_INET6
, RTM_GETANYCAST
, NULL
, inet6_dump_ifacaddr
);
4592 ipv6_addr_label_rtnl_register();
4596 unregister_netdevice_notifier(&ipv6_dev_notf
);
4598 unregister_pernet_subsys(&addrconf_ops
);
4603 void addrconf_cleanup(void)
4605 struct net_device
*dev
;
4608 unregister_netdevice_notifier(&ipv6_dev_notf
);
4609 unregister_pernet_subsys(&addrconf_ops
);
4613 /* clean dev list */
4614 for_each_netdev(&init_net
, dev
) {
4615 if (__in6_dev_get(dev
) == NULL
)
4617 addrconf_ifdown(dev
, 1);
4619 addrconf_ifdown(init_net
.loopback_dev
, 2);
4624 spin_lock_bh(&addrconf_hash_lock
);
4625 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
4626 WARN_ON(!hlist_empty(&inet6_addr_lst
[i
]));
4627 spin_unlock_bh(&addrconf_hash_lock
);
4629 del_timer(&addr_chk_timer
);