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 <asm/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 inet6_ifaddr
*inet6_addr_lst
[IN6_ADDR_HSIZE
];
130 static DEFINE_RWLOCK(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_bonding_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
259 static void addrconf_mod_timer(struct inet6_ifaddr
*ifp
,
260 enum addrconf_timer_t what
,
263 if (!del_timer(&ifp
->timer
))
268 ifp
->timer
.function
= addrconf_dad_timer
;
271 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(idev
->addr_list
!= NULL
);
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 printk("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 memcpy(&ndev
->cnf
, dev_net(dev
)->ipv6
.devconf_dflt
, sizeof(ndev
->cnf
));
354 ndev
->cnf
.mtu6
= dev
->mtu
;
355 ndev
->cnf
.sysctl
= NULL
;
356 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
357 if (ndev
->nd_parms
== NULL
) {
361 if (ndev
->cnf
.forwarding
)
362 dev_disable_lro(dev
);
363 /* We refer to the device */
366 if (snmp6_alloc_dev(ndev
) < 0) {
368 "%s(): cannot allocate memory for statistics; dev=%s.\n",
369 __func__
, dev
->name
));
370 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
372 in6_dev_finish_destroy(ndev
);
376 if (snmp6_register_dev(ndev
) < 0) {
378 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
379 __func__
, dev
->name
));
380 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
382 in6_dev_finish_destroy(ndev
);
386 /* One reference from device. We must do this before
387 * we invoke __ipv6_regen_rndid().
391 if (dev
->flags
& (IFF_NOARP
| IFF_LOOPBACK
))
392 ndev
->cnf
.accept_dad
= -1;
394 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
395 if (dev
->type
== ARPHRD_SIT
&& (dev
->priv_flags
& IFF_ISATAP
)) {
397 "%s: Disabled Multicast RS\n",
399 ndev
->cnf
.rtr_solicits
= 0;
403 #ifdef CONFIG_IPV6_PRIVACY
404 setup_timer(&ndev
->regen_timer
, ipv6_regen_rndid
, (unsigned long)ndev
);
405 if ((dev
->flags
&IFF_LOOPBACK
) ||
406 dev
->type
== ARPHRD_TUNNEL
||
407 dev
->type
== ARPHRD_TUNNEL6
||
408 dev
->type
== ARPHRD_SIT
||
409 dev
->type
== ARPHRD_NONE
) {
411 "%s: Disabled Privacy Extensions\n",
413 ndev
->cnf
.use_tempaddr
= -1;
416 ipv6_regen_rndid((unsigned long) ndev
);
420 if (netif_running(dev
) && addrconf_qdisc_ok(dev
))
421 ndev
->if_flags
|= IF_READY
;
423 ipv6_mc_init_dev(ndev
);
424 ndev
->tstamp
= jiffies
;
425 addrconf_sysctl_register(ndev
);
426 /* protected by rtnl_lock */
427 rcu_assign_pointer(dev
->ip6_ptr
, ndev
);
429 /* Join all-node multicast group */
430 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allnodes
);
435 static struct inet6_dev
* ipv6_find_idev(struct net_device
*dev
)
437 struct inet6_dev
*idev
;
441 if ((idev
= __in6_dev_get(dev
)) == NULL
) {
442 if ((idev
= ipv6_add_dev(dev
)) == NULL
)
446 if (dev
->flags
&IFF_UP
)
452 static void dev_forward_change(struct inet6_dev
*idev
)
454 struct net_device
*dev
;
455 struct inet6_ifaddr
*ifa
;
460 if (idev
->cnf
.forwarding
)
461 dev_disable_lro(dev
);
462 if (dev
&& (dev
->flags
& IFF_MULTICAST
)) {
463 if (idev
->cnf
.forwarding
)
464 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
466 ipv6_dev_mc_dec(dev
, &in6addr_linklocal_allrouters
);
468 for (ifa
=idev
->addr_list
; ifa
; ifa
=ifa
->if_next
) {
469 if (ifa
->flags
&IFA_F_TENTATIVE
)
471 if (idev
->cnf
.forwarding
)
472 addrconf_join_anycast(ifa
);
474 addrconf_leave_anycast(ifa
);
479 static void addrconf_forward_change(struct net
*net
, __s32 newf
)
481 struct net_device
*dev
;
482 struct inet6_dev
*idev
;
485 for_each_netdev_rcu(net
, dev
) {
486 idev
= __in6_dev_get(dev
);
488 int changed
= (!idev
->cnf
.forwarding
) ^ (!newf
);
489 idev
->cnf
.forwarding
= newf
;
491 dev_forward_change(idev
);
497 static int addrconf_fixup_forwarding(struct ctl_table
*table
, int *p
, int old
)
501 net
= (struct net
*)table
->extra2
;
502 if (p
== &net
->ipv6
.devconf_dflt
->forwarding
)
505 if (!rtnl_trylock()) {
506 /* Restore the original values before restarting */
508 return restart_syscall();
511 if (p
== &net
->ipv6
.devconf_all
->forwarding
) {
512 __s32 newf
= net
->ipv6
.devconf_all
->forwarding
;
513 net
->ipv6
.devconf_dflt
->forwarding
= newf
;
514 addrconf_forward_change(net
, newf
);
515 } else if ((!*p
) ^ (!old
))
516 dev_forward_change((struct inet6_dev
*)table
->extra1
);
520 rt6_purge_dflt_routers(net
);
525 /* Nobody refers to this ifaddr, destroy it */
527 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
529 WARN_ON(ifp
->if_next
!= NULL
);
530 WARN_ON(ifp
->lst_next
!= NULL
);
532 #ifdef NET_REFCNT_DEBUG
533 printk(KERN_DEBUG
"inet6_ifa_finish_destroy\n");
536 in6_dev_put(ifp
->idev
);
538 if (del_timer(&ifp
->timer
))
539 printk("Timer is still running, when freeing ifa=%p\n", ifp
);
542 printk("Freeing alive inet6 address %p\n", ifp
);
545 dst_release(&ifp
->rt
->u
.dst
);
551 ipv6_link_dev_addr(struct inet6_dev
*idev
, struct inet6_ifaddr
*ifp
)
553 struct inet6_ifaddr
*ifa
, **ifap
;
554 int ifp_scope
= ipv6_addr_src_scope(&ifp
->addr
);
557 * Each device address list is sorted in order of scope -
558 * global before linklocal.
560 for (ifap
= &idev
->addr_list
; (ifa
= *ifap
) != NULL
;
561 ifap
= &ifa
->if_next
) {
562 if (ifp_scope
>= ipv6_addr_src_scope(&ifa
->addr
))
566 ifp
->if_next
= *ifap
;
571 * Hash function taken from net_alias.c
573 static u8
ipv6_addr_hash(const struct in6_addr
*addr
)
578 * We perform the hash function over the last 64 bits of the address
579 * This will include the IEEE address token on links that support it.
582 word
= (__force u32
)(addr
->s6_addr32
[2] ^ addr
->s6_addr32
[3]);
583 word
^= (word
>> 16);
586 return ((word
^ (word
>> 4)) & 0x0f);
589 /* On success it returns ifp with increased reference count */
591 static struct inet6_ifaddr
*
592 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
, int pfxlen
,
593 int scope
, u32 flags
)
595 struct inet6_ifaddr
*ifa
= NULL
;
599 int addr_type
= ipv6_addr_type(addr
);
601 if (addr_type
== IPV6_ADDR_ANY
||
602 addr_type
& IPV6_ADDR_MULTICAST
||
603 (!(idev
->dev
->flags
& IFF_LOOPBACK
) &&
604 addr_type
& IPV6_ADDR_LOOPBACK
))
605 return ERR_PTR(-EADDRNOTAVAIL
);
609 err
= -ENODEV
; /*XXX*/
613 if (idev
->cnf
.disable_ipv6
) {
618 write_lock(&addrconf_hash_lock
);
620 /* Ignore adding duplicate addresses on an interface */
621 if (ipv6_chk_same_addr(dev_net(idev
->dev
), addr
, idev
->dev
)) {
622 ADBG(("ipv6_add_addr: already assigned\n"));
627 ifa
= kzalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
630 ADBG(("ipv6_add_addr: malloc failed\n"));
635 rt
= addrconf_dst_alloc(idev
, addr
, 0);
641 ipv6_addr_copy(&ifa
->addr
, addr
);
643 spin_lock_init(&ifa
->lock
);
644 init_timer(&ifa
->timer
);
645 ifa
->timer
.data
= (unsigned long) ifa
;
647 ifa
->prefix_len
= pfxlen
;
648 ifa
->flags
= flags
| IFA_F_TENTATIVE
;
649 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
654 * part one of RFC 4429, section 3.3
655 * We should not configure an address as
656 * optimistic if we do not yet know the link
657 * layer address of our nexhop router
660 if (rt
->rt6i_nexthop
== NULL
)
661 ifa
->flags
&= ~IFA_F_OPTIMISTIC
;
668 /* Add to big hash table */
669 hash
= ipv6_addr_hash(addr
);
671 ifa
->lst_next
= inet6_addr_lst
[hash
];
672 inet6_addr_lst
[hash
] = ifa
;
674 write_unlock(&addrconf_hash_lock
);
676 write_lock(&idev
->lock
);
677 /* Add to inet6_dev unicast addr list. */
678 ipv6_link_dev_addr(idev
, ifa
);
680 #ifdef CONFIG_IPV6_PRIVACY
681 if (ifa
->flags
&IFA_F_TEMPORARY
) {
682 ifa
->tmp_next
= idev
->tempaddr_list
;
683 idev
->tempaddr_list
= ifa
;
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 write_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
, **ifap
;
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 write_lock_bh(&addrconf_hash_lock
);
721 for (ifap
= &inet6_addr_lst
[hash
]; (ifa
=*ifap
) != NULL
;
722 ifap
= &ifa
->lst_next
) {
724 *ifap
= ifa
->lst_next
;
726 ifa
->lst_next
= NULL
;
730 write_unlock_bh(&addrconf_hash_lock
);
732 write_lock_bh(&idev
->lock
);
733 #ifdef CONFIG_IPV6_PRIVACY
734 if (ifp
->flags
&IFA_F_TEMPORARY
) {
735 for (ifap
= &idev
->tempaddr_list
; (ifa
=*ifap
) != NULL
;
736 ifap
= &ifa
->tmp_next
) {
738 *ifap
= ifa
->tmp_next
;
740 in6_ifa_put(ifp
->ifpub
);
744 ifa
->tmp_next
= NULL
;
751 for (ifap
= &idev
->addr_list
; (ifa
=*ifap
) != NULL
;) {
753 *ifap
= ifa
->if_next
;
756 if (!(ifp
->flags
& IFA_F_PERMANENT
) || onlink
> 0)
760 } else if (ifp
->flags
& IFA_F_PERMANENT
) {
761 if (ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
763 if (ifa
->flags
& IFA_F_PERMANENT
) {
768 unsigned long lifetime
;
773 spin_lock(&ifa
->lock
);
775 lifetime
= addrconf_timeout_fixup(ifa
->valid_lft
, HZ
);
777 * Note: Because this address is
778 * not permanent, lifetime <
779 * LONG_MAX / HZ here.
781 if (time_before(expires
,
782 ifa
->tstamp
+ lifetime
* HZ
))
783 expires
= ifa
->tstamp
+ lifetime
* HZ
;
784 spin_unlock(&ifa
->lock
);
788 ifap
= &ifa
->if_next
;
790 write_unlock_bh(&idev
->lock
);
792 addrconf_del_timer(ifp
);
794 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
796 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifp
);
799 * Purge or update corresponding prefix
801 * 1) we don't purge prefix here if address was not permanent.
802 * prefix is managed by its own lifetime.
803 * 2) if there're no addresses, delete prefix.
804 * 3) if there're still other permanent address(es),
805 * corresponding prefix is still permanent.
806 * 4) otherwise, update prefix lifetime to the
807 * longest valid lifetime among the corresponding
808 * addresses on the device.
809 * Note: subsequent RA will update lifetime.
813 if ((ifp
->flags
& IFA_F_PERMANENT
) && onlink
< 1) {
814 struct in6_addr prefix
;
816 struct net
*net
= dev_net(ifp
->idev
->dev
);
817 ipv6_addr_prefix(&prefix
, &ifp
->addr
, ifp
->prefix_len
);
818 rt
= rt6_lookup(net
, &prefix
, NULL
, ifp
->idev
->dev
->ifindex
, 1);
820 if (rt
&& addrconf_is_prefix_route(rt
)) {
824 } else if (!(rt
->rt6i_flags
& RTF_EXPIRES
)) {
825 rt
->rt6i_expires
= expires
;
826 rt
->rt6i_flags
|= RTF_EXPIRES
;
829 dst_release(&rt
->u
.dst
);
835 #ifdef CONFIG_IPV6_PRIVACY
836 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
838 struct inet6_dev
*idev
= ifp
->idev
;
839 struct in6_addr addr
, *tmpaddr
;
840 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_cstamp
, tmp_tstamp
;
841 unsigned long regen_advance
;
847 write_lock(&idev
->lock
);
849 spin_lock_bh(&ift
->lock
);
850 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
851 spin_unlock_bh(&ift
->lock
);
858 if (idev
->cnf
.use_tempaddr
<= 0) {
859 write_unlock(&idev
->lock
);
861 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
866 spin_lock_bh(&ifp
->lock
);
867 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
868 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
869 spin_unlock_bh(&ifp
->lock
);
870 write_unlock(&idev
->lock
);
872 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
878 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
879 if (__ipv6_try_regen_rndid(idev
, tmpaddr
) < 0) {
880 spin_unlock_bh(&ifp
->lock
);
881 write_unlock(&idev
->lock
);
883 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
889 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
890 tmp_valid_lft
= min_t(__u32
,
892 idev
->cnf
.temp_valid_lft
);
893 tmp_prefered_lft
= min_t(__u32
,
895 idev
->cnf
.temp_prefered_lft
- desync_factor
/ HZ
);
896 tmp_plen
= ifp
->prefix_len
;
897 max_addresses
= idev
->cnf
.max_addresses
;
898 tmp_cstamp
= ifp
->cstamp
;
899 tmp_tstamp
= ifp
->tstamp
;
900 spin_unlock_bh(&ifp
->lock
);
902 regen_advance
= idev
->cnf
.regen_max_retry
*
903 idev
->cnf
.dad_transmits
*
904 idev
->nd_parms
->retrans_time
/ HZ
;
905 write_unlock(&idev
->lock
);
907 /* A temporary address is created only if this calculated Preferred
908 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
909 * an implementation must not create a temporary address with a zero
910 * Preferred Lifetime.
912 if (tmp_prefered_lft
<= regen_advance
) {
919 addr_flags
= IFA_F_TEMPORARY
;
920 /* set in addrconf_prefix_rcv() */
921 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
922 addr_flags
|= IFA_F_OPTIMISTIC
;
924 ift
= !max_addresses
||
925 ipv6_count_addresses(idev
) < max_addresses
?
926 ipv6_add_addr(idev
, &addr
, tmp_plen
,
927 ipv6_addr_type(&addr
)&IPV6_ADDR_SCOPE_MASK
,
929 if (!ift
|| IS_ERR(ift
)) {
933 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
935 write_lock(&idev
->lock
);
939 spin_lock_bh(&ift
->lock
);
941 ift
->valid_lft
= tmp_valid_lft
;
942 ift
->prefered_lft
= tmp_prefered_lft
;
943 ift
->cstamp
= tmp_cstamp
;
944 ift
->tstamp
= tmp_tstamp
;
945 spin_unlock_bh(&ift
->lock
);
947 addrconf_dad_start(ift
, 0);
956 * Choose an appropriate source address (RFC3484)
959 IPV6_SADDR_RULE_INIT
= 0,
960 IPV6_SADDR_RULE_LOCAL
,
961 IPV6_SADDR_RULE_SCOPE
,
962 IPV6_SADDR_RULE_PREFERRED
,
963 #ifdef CONFIG_IPV6_MIP6
967 IPV6_SADDR_RULE_LABEL
,
968 #ifdef CONFIG_IPV6_PRIVACY
969 IPV6_SADDR_RULE_PRIVACY
,
971 IPV6_SADDR_RULE_ORCHID
,
972 IPV6_SADDR_RULE_PREFIX
,
976 struct ipv6_saddr_score
{
979 struct inet6_ifaddr
*ifa
;
980 DECLARE_BITMAP(scorebits
, IPV6_SADDR_RULE_MAX
);
985 struct ipv6_saddr_dst
{
986 const struct in6_addr
*addr
;
993 static inline int ipv6_saddr_preferred(int type
)
995 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|IPV6_ADDR_LOOPBACK
))
1000 static int ipv6_get_saddr_eval(struct net
*net
,
1001 struct ipv6_saddr_score
*score
,
1002 struct ipv6_saddr_dst
*dst
,
1007 if (i
<= score
->rule
) {
1009 case IPV6_SADDR_RULE_SCOPE
:
1010 ret
= score
->scopedist
;
1012 case IPV6_SADDR_RULE_PREFIX
:
1013 ret
= score
->matchlen
;
1016 ret
= !!test_bit(i
, score
->scorebits
);
1022 case IPV6_SADDR_RULE_INIT
:
1023 /* Rule 0: remember if hiscore is not ready yet */
1026 case IPV6_SADDR_RULE_LOCAL
:
1027 /* Rule 1: Prefer same address */
1028 ret
= ipv6_addr_equal(&score
->ifa
->addr
, dst
->addr
);
1030 case IPV6_SADDR_RULE_SCOPE
:
1031 /* Rule 2: Prefer appropriate scope
1036 * ---+--+-+---> scope
1038 * | d is scope of the destination.
1040 * | \ <- smaller scope is better if
1041 * B-15 | \ if scope is enough for destinaion.
1042 * | ret = B - scope (-1 <= scope >= d <= 15).
1044 * |/ <- greater is better
1045 * -C / if scope is not enough for destination.
1046 * /| ret = scope - C (-1 <= d < scope <= 15).
1048 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1049 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1050 * Assume B = 0 and we get C > 29.
1052 ret
= __ipv6_addr_src_scope(score
->addr_type
);
1053 if (ret
>= dst
->scope
)
1056 ret
-= 128; /* 30 is enough */
1057 score
->scopedist
= ret
;
1059 case IPV6_SADDR_RULE_PREFERRED
:
1060 /* Rule 3: Avoid deprecated and optimistic addresses */
1061 ret
= ipv6_saddr_preferred(score
->addr_type
) ||
1062 !(score
->ifa
->flags
& (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
));
1064 #ifdef CONFIG_IPV6_MIP6
1065 case IPV6_SADDR_RULE_HOA
:
1067 /* Rule 4: Prefer home address */
1068 int prefhome
= !(dst
->prefs
& IPV6_PREFER_SRC_COA
);
1069 ret
= !(score
->ifa
->flags
& IFA_F_HOMEADDRESS
) ^ prefhome
;
1073 case IPV6_SADDR_RULE_OIF
:
1074 /* Rule 5: Prefer outgoing interface */
1075 ret
= (!dst
->ifindex
||
1076 dst
->ifindex
== score
->ifa
->idev
->dev
->ifindex
);
1078 case IPV6_SADDR_RULE_LABEL
:
1079 /* Rule 6: Prefer matching label */
1080 ret
= ipv6_addr_label(net
,
1081 &score
->ifa
->addr
, score
->addr_type
,
1082 score
->ifa
->idev
->dev
->ifindex
) == dst
->label
;
1084 #ifdef CONFIG_IPV6_PRIVACY
1085 case IPV6_SADDR_RULE_PRIVACY
:
1087 /* Rule 7: Prefer public address
1088 * Note: prefer temprary address if use_tempaddr >= 2
1090 int preftmp
= dst
->prefs
& (IPV6_PREFER_SRC_PUBLIC
|IPV6_PREFER_SRC_TMP
) ?
1091 !!(dst
->prefs
& IPV6_PREFER_SRC_TMP
) :
1092 score
->ifa
->idev
->cnf
.use_tempaddr
>= 2;
1093 ret
= (!(score
->ifa
->flags
& IFA_F_TEMPORARY
)) ^ preftmp
;
1097 case IPV6_SADDR_RULE_ORCHID
:
1098 /* Rule 8-: Prefer ORCHID vs ORCHID or
1099 * non-ORCHID vs non-ORCHID
1101 ret
= !(ipv6_addr_orchid(&score
->ifa
->addr
) ^
1102 ipv6_addr_orchid(dst
->addr
));
1104 case IPV6_SADDR_RULE_PREFIX
:
1105 /* Rule 8: Use longest matching prefix */
1106 score
->matchlen
= ret
= ipv6_addr_diff(&score
->ifa
->addr
,
1114 __set_bit(i
, score
->scorebits
);
1120 int ipv6_dev_get_saddr(struct net
*net
, struct net_device
*dst_dev
,
1121 const struct in6_addr
*daddr
, unsigned int prefs
,
1122 struct in6_addr
*saddr
)
1124 struct ipv6_saddr_score scores
[2],
1125 *score
= &scores
[0], *hiscore
= &scores
[1];
1126 struct ipv6_saddr_dst dst
;
1127 struct net_device
*dev
;
1130 dst_type
= __ipv6_addr_type(daddr
);
1132 dst
.ifindex
= dst_dev
? dst_dev
->ifindex
: 0;
1133 dst
.scope
= __ipv6_addr_src_scope(dst_type
);
1134 dst
.label
= ipv6_addr_label(net
, daddr
, dst_type
, dst
.ifindex
);
1138 hiscore
->ifa
= NULL
;
1142 for_each_netdev_rcu(net
, dev
) {
1143 struct inet6_dev
*idev
;
1145 /* Candidate Source Address (section 4)
1146 * - multicast and link-local destination address,
1147 * the set of candidate source address MUST only
1148 * include addresses assigned to interfaces
1149 * belonging to the same link as the outgoing
1151 * (- For site-local destination addresses, the
1152 * set of candidate source addresses MUST only
1153 * include addresses assigned to interfaces
1154 * belonging to the same site as the outgoing
1157 if (((dst_type
& IPV6_ADDR_MULTICAST
) ||
1158 dst
.scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
) &&
1159 dst
.ifindex
&& dev
->ifindex
!= dst
.ifindex
)
1162 idev
= __in6_dev_get(dev
);
1166 read_lock_bh(&idev
->lock
);
1167 for (score
->ifa
= idev
->addr_list
; score
->ifa
; score
->ifa
= score
->ifa
->if_next
) {
1171 * - Tentative Address (RFC2462 section 5.4)
1172 * - A tentative address is not considered
1173 * "assigned to an interface" in the traditional
1174 * sense, unless it is also flagged as optimistic.
1175 * - Candidate Source Address (section 4)
1176 * - In any case, anycast addresses, multicast
1177 * addresses, and the unspecified address MUST
1178 * NOT be included in a candidate set.
1180 if ((score
->ifa
->flags
& IFA_F_TENTATIVE
) &&
1181 (!(score
->ifa
->flags
& IFA_F_OPTIMISTIC
)))
1184 score
->addr_type
= __ipv6_addr_type(&score
->ifa
->addr
);
1186 if (unlikely(score
->addr_type
== IPV6_ADDR_ANY
||
1187 score
->addr_type
& IPV6_ADDR_MULTICAST
)) {
1188 LIMIT_NETDEBUG(KERN_DEBUG
1189 "ADDRCONF: unspecified / multicast address "
1190 "assigned as unicast address on %s",
1196 bitmap_zero(score
->scorebits
, IPV6_SADDR_RULE_MAX
);
1198 for (i
= 0; i
< IPV6_SADDR_RULE_MAX
; i
++) {
1199 int minihiscore
, miniscore
;
1201 minihiscore
= ipv6_get_saddr_eval(net
, hiscore
, &dst
, i
);
1202 miniscore
= ipv6_get_saddr_eval(net
, score
, &dst
, i
);
1204 if (minihiscore
> miniscore
) {
1205 if (i
== IPV6_SADDR_RULE_SCOPE
&&
1206 score
->scopedist
> 0) {
1209 * each remaining entry
1210 * has too small (not enough)
1211 * scope, because ifa entries
1212 * are sorted by their scope
1218 } else if (minihiscore
< miniscore
) {
1220 in6_ifa_put(hiscore
->ifa
);
1222 in6_ifa_hold(score
->ifa
);
1224 swap(hiscore
, score
);
1226 /* restore our iterator */
1227 score
->ifa
= hiscore
->ifa
;
1234 read_unlock_bh(&idev
->lock
);
1239 return -EADDRNOTAVAIL
;
1241 ipv6_addr_copy(saddr
, &hiscore
->ifa
->addr
);
1242 in6_ifa_put(hiscore
->ifa
);
1246 EXPORT_SYMBOL(ipv6_dev_get_saddr
);
1248 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1249 unsigned char banned_flags
)
1251 struct inet6_dev
*idev
;
1252 int err
= -EADDRNOTAVAIL
;
1255 if ((idev
= __in6_dev_get(dev
)) != NULL
) {
1256 struct inet6_ifaddr
*ifp
;
1258 read_lock_bh(&idev
->lock
);
1259 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1260 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
& banned_flags
)) {
1261 ipv6_addr_copy(addr
, &ifp
->addr
);
1266 read_unlock_bh(&idev
->lock
);
1272 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1275 struct inet6_ifaddr
*ifp
;
1277 read_lock_bh(&idev
->lock
);
1278 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
)
1280 read_unlock_bh(&idev
->lock
);
1284 int ipv6_chk_addr(struct net
*net
, struct in6_addr
*addr
,
1285 struct net_device
*dev
, int strict
)
1287 struct inet6_ifaddr
* ifp
;
1288 u8 hash
= ipv6_addr_hash(addr
);
1290 read_lock_bh(&addrconf_hash_lock
);
1291 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1292 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1294 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1295 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1296 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1297 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))
1301 read_unlock_bh(&addrconf_hash_lock
);
1304 EXPORT_SYMBOL(ipv6_chk_addr
);
1307 int ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
1308 struct net_device
*dev
)
1310 struct inet6_ifaddr
* ifp
;
1311 u8 hash
= ipv6_addr_hash(addr
);
1313 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1314 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1316 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1317 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1324 int ipv6_chk_prefix(struct in6_addr
*addr
, struct net_device
*dev
)
1326 struct inet6_dev
*idev
;
1327 struct inet6_ifaddr
*ifa
;
1332 idev
= __in6_dev_get(dev
);
1334 read_lock_bh(&idev
->lock
);
1335 for (ifa
= idev
->addr_list
; ifa
; ifa
= ifa
->if_next
) {
1336 onlink
= ipv6_prefix_equal(addr
, &ifa
->addr
,
1341 read_unlock_bh(&idev
->lock
);
1347 EXPORT_SYMBOL(ipv6_chk_prefix
);
1349 struct inet6_ifaddr
*ipv6_get_ifaddr(struct net
*net
, const struct in6_addr
*addr
,
1350 struct net_device
*dev
, int strict
)
1352 struct inet6_ifaddr
* ifp
;
1353 u8 hash
= ipv6_addr_hash(addr
);
1355 read_lock_bh(&addrconf_hash_lock
);
1356 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1357 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1359 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1360 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1361 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1367 read_unlock_bh(&addrconf_hash_lock
);
1372 /* Gets referenced address, destroys ifaddr */
1374 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
, int dad_failed
)
1376 if (ifp
->flags
&IFA_F_PERMANENT
) {
1377 spin_lock_bh(&ifp
->lock
);
1378 addrconf_del_timer(ifp
);
1379 ifp
->flags
|= IFA_F_TENTATIVE
;
1381 ifp
->flags
|= IFA_F_DADFAILED
;
1382 spin_unlock_bh(&ifp
->lock
);
1384 #ifdef CONFIG_IPV6_PRIVACY
1385 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1386 struct inet6_ifaddr
*ifpub
;
1387 spin_lock_bh(&ifp
->lock
);
1390 in6_ifa_hold(ifpub
);
1391 spin_unlock_bh(&ifp
->lock
);
1392 ipv6_create_tempaddr(ifpub
, ifp
);
1395 spin_unlock_bh(&ifp
->lock
);
1403 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1405 struct inet6_dev
*idev
= ifp
->idev
;
1407 if (net_ratelimit())
1408 printk(KERN_INFO
"%s: IPv6 duplicate address %pI6c detected!\n",
1409 ifp
->idev
->dev
->name
, &ifp
->addr
);
1411 if (idev
->cnf
.accept_dad
> 1 && !idev
->cnf
.disable_ipv6
) {
1412 struct in6_addr addr
;
1414 addr
.s6_addr32
[0] = htonl(0xfe800000);
1415 addr
.s6_addr32
[1] = 0;
1417 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) &&
1418 ipv6_addr_equal(&ifp
->addr
, &addr
)) {
1419 /* DAD failed for link-local based on MAC address */
1420 idev
->cnf
.disable_ipv6
= 1;
1422 printk(KERN_INFO
"%s: IPv6 being disabled!\n",
1423 ifp
->idev
->dev
->name
);
1427 addrconf_dad_stop(ifp
, 1);
1430 /* Join to solicited addr multicast group. */
1432 void addrconf_join_solict(struct net_device
*dev
, struct in6_addr
*addr
)
1434 struct in6_addr maddr
;
1436 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1439 addrconf_addr_solict_mult(addr
, &maddr
);
1440 ipv6_dev_mc_inc(dev
, &maddr
);
1443 void addrconf_leave_solict(struct inet6_dev
*idev
, struct in6_addr
*addr
)
1445 struct in6_addr maddr
;
1447 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1450 addrconf_addr_solict_mult(addr
, &maddr
);
1451 __ipv6_dev_mc_dec(idev
, &maddr
);
1454 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1456 struct in6_addr addr
;
1457 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1458 if (ipv6_addr_any(&addr
))
1460 ipv6_dev_ac_inc(ifp
->idev
->dev
, &addr
);
1463 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1465 struct in6_addr addr
;
1466 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1467 if (ipv6_addr_any(&addr
))
1469 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1472 static int addrconf_ifid_eui48(u8
*eui
, struct net_device
*dev
)
1474 if (dev
->addr_len
!= ETH_ALEN
)
1476 memcpy(eui
, dev
->dev_addr
, 3);
1477 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1480 * The zSeries OSA network cards can be shared among various
1481 * OS instances, but the OSA cards have only one MAC address.
1482 * This leads to duplicate address conflicts in conjunction
1483 * with IPv6 if more than one instance uses the same card.
1485 * The driver for these cards can deliver a unique 16-bit
1486 * identifier for each instance sharing the same card. It is
1487 * placed instead of 0xFFFE in the interface identifier. The
1488 * "u" bit of the interface identifier is not inverted in this
1489 * case. Hence the resulting interface identifier has local
1490 * scope according to RFC2373.
1493 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1494 eui
[4] = dev
->dev_id
& 0xFF;
1503 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
1505 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1506 if (dev
->addr_len
!= ARCNET_ALEN
)
1509 eui
[7] = *(u8
*)dev
->dev_addr
;
1513 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
1515 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1517 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1522 int __ipv6_isatap_ifid(u8
*eui
, __be32 addr
)
1526 eui
[0] = (ipv4_is_zeronet(addr
) || ipv4_is_private_10(addr
) ||
1527 ipv4_is_loopback(addr
) || ipv4_is_linklocal_169(addr
) ||
1528 ipv4_is_private_172(addr
) || ipv4_is_test_192(addr
) ||
1529 ipv4_is_anycast_6to4(addr
) || ipv4_is_private_192(addr
) ||
1530 ipv4_is_test_198(addr
) || ipv4_is_multicast(addr
) ||
1531 ipv4_is_lbcast(addr
)) ? 0x00 : 0x02;
1535 memcpy(eui
+ 4, &addr
, 4);
1538 EXPORT_SYMBOL(__ipv6_isatap_ifid
);
1540 static int addrconf_ifid_sit(u8
*eui
, struct net_device
*dev
)
1542 if (dev
->priv_flags
& IFF_ISATAP
)
1543 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
1547 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1549 switch (dev
->type
) {
1552 case ARPHRD_IEEE802_TR
:
1553 return addrconf_ifid_eui48(eui
, dev
);
1555 return addrconf_ifid_arcnet(eui
, dev
);
1556 case ARPHRD_INFINIBAND
:
1557 return addrconf_ifid_infiniband(eui
, dev
);
1559 return addrconf_ifid_sit(eui
, dev
);
1564 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1567 struct inet6_ifaddr
*ifp
;
1569 read_lock_bh(&idev
->lock
);
1570 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1571 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1572 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1577 read_unlock_bh(&idev
->lock
);
1581 #ifdef CONFIG_IPV6_PRIVACY
1582 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1583 static int __ipv6_regen_rndid(struct inet6_dev
*idev
)
1586 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
1587 idev
->rndid
[0] &= ~0x02;
1590 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1591 * check if generated address is not inappropriate
1593 * - Reserved subnet anycast (RFC 2526)
1594 * 11111101 11....11 1xxxxxxx
1595 * - ISATAP (RFC4214) 6.1
1596 * 00-00-5E-FE-xx-xx-xx-xx
1598 * - XXX: already assigned to an address on the device
1600 if (idev
->rndid
[0] == 0xfd &&
1601 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1602 (idev
->rndid
[7]&0x80))
1604 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1605 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1607 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1614 static void ipv6_regen_rndid(unsigned long data
)
1616 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1617 unsigned long expires
;
1620 write_lock_bh(&idev
->lock
);
1625 if (__ipv6_regen_rndid(idev
) < 0)
1629 idev
->cnf
.temp_prefered_lft
* HZ
-
1630 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
- desync_factor
;
1631 if (time_before(expires
, jiffies
)) {
1633 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1638 if (!mod_timer(&idev
->regen_timer
, expires
))
1642 write_unlock_bh(&idev
->lock
);
1643 rcu_read_unlock_bh();
1647 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
) {
1650 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1651 ret
= __ipv6_regen_rndid(idev
);
1661 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1662 unsigned long expires
, u32 flags
)
1664 struct fib6_config cfg
= {
1665 .fc_table
= RT6_TABLE_PREFIX
,
1666 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1667 .fc_ifindex
= dev
->ifindex
,
1668 .fc_expires
= expires
,
1670 .fc_flags
= RTF_UP
| flags
,
1671 .fc_nlinfo
.nl_net
= dev_net(dev
),
1672 .fc_protocol
= RTPROT_KERNEL
,
1675 ipv6_addr_copy(&cfg
.fc_dst
, pfx
);
1677 /* Prevent useless cloning on PtP SIT.
1678 This thing is done here expecting that the whole
1679 class of non-broadcast devices need not cloning.
1681 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1682 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
1683 cfg
.fc_flags
|= RTF_NONEXTHOP
;
1686 ip6_route_add(&cfg
);
1689 /* Create "default" multicast route to the interface */
1691 static void addrconf_add_mroute(struct net_device
*dev
)
1693 struct fib6_config cfg
= {
1694 .fc_table
= RT6_TABLE_LOCAL
,
1695 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1696 .fc_ifindex
= dev
->ifindex
,
1699 .fc_nlinfo
.nl_net
= dev_net(dev
),
1702 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
1704 ip6_route_add(&cfg
);
1707 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1708 static void sit_route_add(struct net_device
*dev
)
1710 struct fib6_config cfg
= {
1711 .fc_table
= RT6_TABLE_MAIN
,
1712 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1713 .fc_ifindex
= dev
->ifindex
,
1715 .fc_flags
= RTF_UP
| RTF_NONEXTHOP
,
1716 .fc_nlinfo
.nl_net
= dev_net(dev
),
1719 /* prefix length - 96 bits "::d.d.d.d" */
1720 ip6_route_add(&cfg
);
1724 static void addrconf_add_lroute(struct net_device
*dev
)
1726 struct in6_addr addr
;
1728 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
1729 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
1732 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
1734 struct inet6_dev
*idev
;
1738 if ((idev
= ipv6_find_idev(dev
)) == NULL
)
1741 /* Add default multicast route */
1742 addrconf_add_mroute(dev
);
1744 /* Add link local route */
1745 addrconf_add_lroute(dev
);
1749 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
)
1751 struct prefix_info
*pinfo
;
1755 struct inet6_dev
*in6_dev
;
1756 struct net
*net
= dev_net(dev
);
1758 pinfo
= (struct prefix_info
*) opt
;
1760 if (len
< sizeof(struct prefix_info
)) {
1761 ADBG(("addrconf: prefix option too short\n"));
1766 * Validation checks ([ADDRCONF], page 19)
1769 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
1771 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
1774 valid_lft
= ntohl(pinfo
->valid
);
1775 prefered_lft
= ntohl(pinfo
->prefered
);
1777 if (prefered_lft
> valid_lft
) {
1778 if (net_ratelimit())
1779 printk(KERN_WARNING
"addrconf: prefix option has invalid lifetime\n");
1783 in6_dev
= in6_dev_get(dev
);
1785 if (in6_dev
== NULL
) {
1786 if (net_ratelimit())
1787 printk(KERN_DEBUG
"addrconf: device %s not configured\n", dev
->name
);
1792 * Two things going on here:
1793 * 1) Add routes for on-link prefixes
1794 * 2) Configure prefixes with the auto flag set
1797 if (pinfo
->onlink
) {
1798 struct rt6_info
*rt
;
1799 unsigned long rt_expires
;
1801 /* Avoid arithmetic overflow. Really, we could
1802 * save rt_expires in seconds, likely valid_lft,
1803 * but it would require division in fib gc, that it
1807 rt_expires
= addrconf_timeout_fixup(valid_lft
, HZ
);
1809 rt_expires
= addrconf_timeout_fixup(valid_lft
, USER_HZ
);
1811 if (addrconf_finite_timeout(rt_expires
))
1814 rt
= rt6_lookup(net
, &pinfo
->prefix
, NULL
,
1817 if (rt
&& addrconf_is_prefix_route(rt
)) {
1818 /* Autoconf prefix route */
1819 if (valid_lft
== 0) {
1822 } else if (addrconf_finite_timeout(rt_expires
)) {
1824 rt
->rt6i_expires
= jiffies
+ rt_expires
;
1825 rt
->rt6i_flags
|= RTF_EXPIRES
;
1827 rt
->rt6i_flags
&= ~RTF_EXPIRES
;
1828 rt
->rt6i_expires
= 0;
1830 } else if (valid_lft
) {
1831 clock_t expires
= 0;
1832 int flags
= RTF_ADDRCONF
| RTF_PREFIX_RT
;
1833 if (addrconf_finite_timeout(rt_expires
)) {
1835 flags
|= RTF_EXPIRES
;
1836 expires
= jiffies_to_clock_t(rt_expires
);
1838 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
1839 dev
, expires
, flags
);
1842 dst_release(&rt
->u
.dst
);
1845 /* Try to figure out our local address for this prefix */
1847 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
1848 struct inet6_ifaddr
* ifp
;
1849 struct in6_addr addr
;
1850 int create
= 0, update_lft
= 0;
1852 if (pinfo
->prefix_len
== 64) {
1853 memcpy(&addr
, &pinfo
->prefix
, 8);
1854 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
1855 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
1856 in6_dev_put(in6_dev
);
1861 if (net_ratelimit())
1862 printk(KERN_DEBUG
"IPv6 addrconf: prefix with wrong length %d\n",
1864 in6_dev_put(in6_dev
);
1869 ifp
= ipv6_get_ifaddr(net
, &addr
, dev
, 1);
1871 if (ifp
== NULL
&& valid_lft
) {
1872 int max_addresses
= in6_dev
->cnf
.max_addresses
;
1875 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1876 if (in6_dev
->cnf
.optimistic_dad
&&
1877 !net
->ipv6
.devconf_all
->forwarding
)
1878 addr_flags
= IFA_F_OPTIMISTIC
;
1881 /* Do not allow to create too much of autoconfigured
1882 * addresses; this would be too easy way to crash kernel.
1884 if (!max_addresses
||
1885 ipv6_count_addresses(in6_dev
) < max_addresses
)
1886 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
1887 addr_type
&IPV6_ADDR_SCOPE_MASK
,
1890 if (!ifp
|| IS_ERR(ifp
)) {
1891 in6_dev_put(in6_dev
);
1895 update_lft
= create
= 1;
1896 ifp
->cstamp
= jiffies
;
1897 addrconf_dad_start(ifp
, RTF_ADDRCONF
|RTF_PREFIX_RT
);
1903 #ifdef CONFIG_IPV6_PRIVACY
1904 struct inet6_ifaddr
*ift
;
1908 /* update lifetime (RFC2462 5.5.3 e) */
1909 spin_lock(&ifp
->lock
);
1911 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
1912 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
1915 if (!update_lft
&& stored_lft
) {
1916 if (valid_lft
> MIN_VALID_LIFETIME
||
1917 valid_lft
> stored_lft
)
1919 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
1920 /* valid_lft <= stored_lft is always true */
1922 * RFC 4862 Section 5.5.3e:
1923 * "Note that the preferred lifetime of
1924 * the corresponding address is always
1925 * reset to the Preferred Lifetime in
1926 * the received Prefix Information
1927 * option, regardless of whether the
1928 * valid lifetime is also reset or
1931 * So if the preferred lifetime in
1932 * this advertisement is different
1933 * than what we have stored, but the
1934 * valid lifetime is invalid, just
1935 * reset prefered_lft.
1937 * We must set the valid lifetime
1938 * to the stored lifetime since we'll
1939 * be updating the timestamp below,
1940 * else we'll set it back to the
1943 if (prefered_lft
!= ifp
->prefered_lft
) {
1944 valid_lft
= stored_lft
;
1948 valid_lft
= MIN_VALID_LIFETIME
;
1949 if (valid_lft
< prefered_lft
)
1950 prefered_lft
= valid_lft
;
1956 ifp
->valid_lft
= valid_lft
;
1957 ifp
->prefered_lft
= prefered_lft
;
1960 ifp
->flags
&= ~IFA_F_DEPRECATED
;
1961 spin_unlock(&ifp
->lock
);
1963 if (!(flags
&IFA_F_TENTATIVE
))
1964 ipv6_ifa_notify(0, ifp
);
1966 spin_unlock(&ifp
->lock
);
1968 #ifdef CONFIG_IPV6_PRIVACY
1969 read_lock_bh(&in6_dev
->lock
);
1970 /* update all temporary addresses in the list */
1971 for (ift
=in6_dev
->tempaddr_list
; ift
; ift
=ift
->tmp_next
) {
1973 * When adjusting the lifetimes of an existing
1974 * temporary address, only lower the lifetimes.
1975 * Implementations must not increase the
1976 * lifetimes of an existing temporary address
1977 * when processing a Prefix Information Option.
1979 if (ifp
!= ift
->ifpub
)
1982 spin_lock(&ift
->lock
);
1984 if (ift
->valid_lft
> valid_lft
&&
1985 ift
->valid_lft
- valid_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1986 ift
->valid_lft
= valid_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1987 if (ift
->prefered_lft
> prefered_lft
&&
1988 ift
->prefered_lft
- prefered_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1989 ift
->prefered_lft
= prefered_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1990 spin_unlock(&ift
->lock
);
1991 if (!(flags
&IFA_F_TENTATIVE
))
1992 ipv6_ifa_notify(0, ift
);
1995 if (create
&& in6_dev
->cnf
.use_tempaddr
> 0) {
1997 * When a new public address is created as described in [ADDRCONF],
1998 * also create a new temporary address.
2000 read_unlock_bh(&in6_dev
->lock
);
2001 ipv6_create_tempaddr(ifp
, NULL
);
2003 read_unlock_bh(&in6_dev
->lock
);
2010 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
2011 in6_dev_put(in6_dev
);
2015 * Set destination address.
2016 * Special case for SIT interfaces where we create a new "virtual"
2019 int addrconf_set_dstaddr(struct net
*net
, void __user
*arg
)
2021 struct in6_ifreq ireq
;
2022 struct net_device
*dev
;
2028 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2031 dev
= __dev_get_by_index(net
, ireq
.ifr6_ifindex
);
2037 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2038 if (dev
->type
== ARPHRD_SIT
) {
2039 const struct net_device_ops
*ops
= dev
->netdev_ops
;
2041 struct ip_tunnel_parm p
;
2043 err
= -EADDRNOTAVAIL
;
2044 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
2047 memset(&p
, 0, sizeof(p
));
2048 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
2052 p
.iph
.protocol
= IPPROTO_IPV6
;
2054 ifr
.ifr_ifru
.ifru_data
= (__force
void __user
*)&p
;
2056 if (ops
->ndo_do_ioctl
) {
2057 mm_segment_t oldfs
= get_fs();
2060 err
= ops
->ndo_do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
2067 dev
= __dev_get_by_name(net
, p
.name
);
2070 err
= dev_open(dev
);
2081 * Manual configuration of address on an interface
2083 static int inet6_addr_add(struct net
*net
, int ifindex
, struct in6_addr
*pfx
,
2084 unsigned int plen
, __u8 ifa_flags
, __u32 prefered_lft
,
2087 struct inet6_ifaddr
*ifp
;
2088 struct inet6_dev
*idev
;
2089 struct net_device
*dev
;
2093 unsigned long timeout
;
2100 /* check the lifetime */
2101 if (!valid_lft
|| prefered_lft
> valid_lft
)
2104 dev
= __dev_get_by_index(net
, ifindex
);
2108 if ((idev
= addrconf_add_dev(dev
)) == NULL
)
2111 scope
= ipv6_addr_scope(pfx
);
2113 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
2114 if (addrconf_finite_timeout(timeout
)) {
2115 expires
= jiffies_to_clock_t(timeout
* HZ
);
2116 valid_lft
= timeout
;
2117 flags
= RTF_EXPIRES
;
2121 ifa_flags
|= IFA_F_PERMANENT
;
2124 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
2125 if (addrconf_finite_timeout(timeout
)) {
2127 ifa_flags
|= IFA_F_DEPRECATED
;
2128 prefered_lft
= timeout
;
2131 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, ifa_flags
);
2134 spin_lock_bh(&ifp
->lock
);
2135 ifp
->valid_lft
= valid_lft
;
2136 ifp
->prefered_lft
= prefered_lft
;
2137 ifp
->tstamp
= jiffies
;
2138 spin_unlock_bh(&ifp
->lock
);
2140 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
2143 * Note that section 3.1 of RFC 4429 indicates
2144 * that the Optimistic flag should not be set for
2145 * manually configured addresses
2147 addrconf_dad_start(ifp
, 0);
2153 return PTR_ERR(ifp
);
2156 static int inet6_addr_del(struct net
*net
, int ifindex
, struct in6_addr
*pfx
,
2159 struct inet6_ifaddr
*ifp
;
2160 struct inet6_dev
*idev
;
2161 struct net_device
*dev
;
2166 dev
= __dev_get_by_index(net
, ifindex
);
2170 if ((idev
= __in6_dev_get(dev
)) == NULL
)
2173 read_lock_bh(&idev
->lock
);
2174 for (ifp
= idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
2175 if (ifp
->prefix_len
== plen
&&
2176 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
2178 read_unlock_bh(&idev
->lock
);
2182 /* If the last address is deleted administratively,
2183 disable IPv6 on this interface.
2185 if (idev
->addr_list
== NULL
)
2186 addrconf_ifdown(idev
->dev
, 1);
2190 read_unlock_bh(&idev
->lock
);
2191 return -EADDRNOTAVAIL
;
2195 int addrconf_add_ifaddr(struct net
*net
, void __user
*arg
)
2197 struct in6_ifreq ireq
;
2200 if (!capable(CAP_NET_ADMIN
))
2203 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2207 err
= inet6_addr_add(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2208 ireq
.ifr6_prefixlen
, IFA_F_PERMANENT
,
2209 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2214 int addrconf_del_ifaddr(struct net
*net
, void __user
*arg
)
2216 struct in6_ifreq ireq
;
2219 if (!capable(CAP_NET_ADMIN
))
2222 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2226 err
= inet6_addr_del(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2227 ireq
.ifr6_prefixlen
);
2232 static void add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
2233 int plen
, int scope
)
2235 struct inet6_ifaddr
*ifp
;
2237 ifp
= ipv6_add_addr(idev
, addr
, plen
, scope
, IFA_F_PERMANENT
);
2239 spin_lock_bh(&ifp
->lock
);
2240 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2241 spin_unlock_bh(&ifp
->lock
);
2242 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2247 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2248 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
2250 struct in6_addr addr
;
2251 struct net_device
*dev
;
2252 struct net
*net
= dev_net(idev
->dev
);
2257 memset(&addr
, 0, sizeof(struct in6_addr
));
2258 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
2260 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
2261 addr
.s6_addr32
[0] = htonl(0xfe800000);
2264 scope
= IPV6_ADDR_COMPATv4
;
2267 if (addr
.s6_addr32
[3]) {
2268 add_addr(idev
, &addr
, 128, scope
);
2272 for_each_netdev(net
, dev
) {
2273 struct in_device
* in_dev
= __in_dev_get_rtnl(dev
);
2274 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
2275 struct in_ifaddr
* ifa
;
2279 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
2282 addr
.s6_addr32
[3] = ifa
->ifa_local
;
2284 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
2286 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
2287 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2291 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2296 add_addr(idev
, &addr
, plen
, flag
);
2303 static void init_loopback(struct net_device
*dev
)
2305 struct inet6_dev
*idev
;
2311 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2312 printk(KERN_DEBUG
"init loopback: add_dev failed\n");
2316 add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
);
2319 static void addrconf_add_linklocal(struct inet6_dev
*idev
, struct in6_addr
*addr
)
2321 struct inet6_ifaddr
* ifp
;
2322 u32 addr_flags
= IFA_F_PERMANENT
;
2324 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2325 if (idev
->cnf
.optimistic_dad
&&
2326 !dev_net(idev
->dev
)->ipv6
.devconf_all
->forwarding
)
2327 addr_flags
|= IFA_F_OPTIMISTIC
;
2331 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, addr_flags
);
2333 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
2334 addrconf_dad_start(ifp
, 0);
2339 static void addrconf_dev_config(struct net_device
*dev
)
2341 struct in6_addr addr
;
2342 struct inet6_dev
* idev
;
2346 if ((dev
->type
!= ARPHRD_ETHER
) &&
2347 (dev
->type
!= ARPHRD_FDDI
) &&
2348 (dev
->type
!= ARPHRD_IEEE802_TR
) &&
2349 (dev
->type
!= ARPHRD_ARCNET
) &&
2350 (dev
->type
!= ARPHRD_INFINIBAND
)) {
2351 /* Alas, we support only Ethernet autoconfiguration. */
2355 idev
= addrconf_add_dev(dev
);
2359 memset(&addr
, 0, sizeof(struct in6_addr
));
2360 addr
.s6_addr32
[0] = htonl(0xFE800000);
2362 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
2363 addrconf_add_linklocal(idev
, &addr
);
2366 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2367 static void addrconf_sit_config(struct net_device
*dev
)
2369 struct inet6_dev
*idev
;
2374 * Configure the tunnel with one of our IPv4
2375 * addresses... we should configure all of
2376 * our v4 addrs in the tunnel
2379 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2380 printk(KERN_DEBUG
"init sit: add_dev failed\n");
2384 if (dev
->priv_flags
& IFF_ISATAP
) {
2385 struct in6_addr addr
;
2387 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2388 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
2389 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
))
2390 addrconf_add_linklocal(idev
, &addr
);
2394 sit_add_v4_addrs(idev
);
2396 if (dev
->flags
&IFF_POINTOPOINT
) {
2397 addrconf_add_mroute(dev
);
2398 addrconf_add_lroute(dev
);
2405 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
2407 struct in6_addr lladdr
;
2409 if (!ipv6_get_lladdr(link_dev
, &lladdr
, IFA_F_TENTATIVE
)) {
2410 addrconf_add_linklocal(idev
, &lladdr
);
2416 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
2418 struct net_device
*link_dev
;
2419 struct net
*net
= dev_net(idev
->dev
);
2421 /* first try to inherit the link-local address from the link device */
2422 if (idev
->dev
->iflink
&&
2423 (link_dev
= __dev_get_by_index(net
, idev
->dev
->iflink
))) {
2424 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2427 /* then try to inherit it from any device */
2428 for_each_netdev(net
, link_dev
) {
2429 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2432 printk(KERN_DEBUG
"init ip6-ip6: add_linklocal failed\n");
2436 * Autoconfigure tunnel with a link-local address so routing protocols,
2437 * DHCPv6, MLD etc. can be run over the virtual link
2440 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
2442 struct inet6_dev
*idev
;
2446 if ((idev
= addrconf_add_dev(dev
)) == NULL
) {
2447 printk(KERN_DEBUG
"init ip6-ip6: add_dev failed\n");
2450 ip6_tnl_add_linklocal(idev
);
2453 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
2456 struct net_device
*dev
= (struct net_device
*) data
;
2457 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2458 int run_pending
= 0;
2462 case NETDEV_REGISTER
:
2463 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2464 idev
= ipv6_add_dev(dev
);
2466 return notifier_from_errno(-ENOMEM
);
2471 if (dev
->flags
& IFF_SLAVE
)
2474 if (event
== NETDEV_UP
) {
2475 if (!addrconf_qdisc_ok(dev
)) {
2476 /* device is not ready yet. */
2478 "ADDRCONF(NETDEV_UP): %s: "
2479 "link is not ready\n",
2484 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
)
2485 idev
= ipv6_add_dev(dev
);
2488 idev
->if_flags
|= IF_READY
;
2492 if (!addrconf_qdisc_ok(dev
)) {
2493 /* device is still not ready. */
2498 if (idev
->if_flags
& IF_READY
) {
2499 /* device is already configured. */
2502 idev
->if_flags
|= IF_READY
;
2506 "ADDRCONF(NETDEV_CHANGE): %s: "
2507 "link becomes ready\n",
2514 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2516 addrconf_sit_config(dev
);
2519 case ARPHRD_TUNNEL6
:
2520 addrconf_ip6_tnl_config(dev
);
2522 case ARPHRD_LOOPBACK
:
2527 addrconf_dev_config(dev
);
2532 addrconf_dad_run(idev
);
2534 /* If the MTU changed during the interface down, when the
2535 interface up, the changed MTU must be reflected in the
2536 idev as well as routers.
2538 if (idev
->cnf
.mtu6
!= dev
->mtu
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2539 rt6_mtu_change(dev
, dev
->mtu
);
2540 idev
->cnf
.mtu6
= dev
->mtu
;
2542 idev
->tstamp
= jiffies
;
2543 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2544 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2545 stop IPv6 on this interface.
2547 if (dev
->mtu
< IPV6_MIN_MTU
)
2548 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2552 case NETDEV_CHANGEMTU
:
2553 if (idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2554 rt6_mtu_change(dev
, dev
->mtu
);
2555 idev
->cnf
.mtu6
= dev
->mtu
;
2559 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2560 idev
= ipv6_add_dev(dev
);
2565 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2568 case NETDEV_UNREGISTER
:
2570 * Remove all addresses from this interface.
2572 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2575 case NETDEV_CHANGENAME
:
2577 snmp6_unregister_dev(idev
);
2578 addrconf_sysctl_unregister(idev
);
2579 addrconf_sysctl_register(idev
);
2580 err
= snmp6_register_dev(idev
);
2582 return notifier_from_errno(err
);
2585 case NETDEV_BONDING_OLDTYPE
:
2586 case NETDEV_BONDING_NEWTYPE
:
2587 addrconf_bonding_change(dev
, event
);
2595 * addrconf module should be notified of a device going up
2597 static struct notifier_block ipv6_dev_notf
= {
2598 .notifier_call
= addrconf_notify
,
2602 static void addrconf_bonding_change(struct net_device
*dev
, unsigned long event
)
2604 struct inet6_dev
*idev
;
2607 idev
= __in6_dev_get(dev
);
2609 if (event
== NETDEV_BONDING_NEWTYPE
)
2610 ipv6_mc_remap(idev
);
2611 else if (event
== NETDEV_BONDING_OLDTYPE
)
2612 ipv6_mc_unmap(idev
);
2615 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2617 struct inet6_dev
*idev
;
2618 struct inet6_ifaddr
*ifa
, *keep_list
, **bifa
;
2619 struct net
*net
= dev_net(dev
);
2624 rt6_ifdown(net
, dev
);
2625 neigh_ifdown(&nd_tbl
, dev
);
2627 idev
= __in6_dev_get(dev
);
2631 /* Step 1: remove reference to ipv6 device from parent device.
2637 /* protected by rtnl_lock */
2638 rcu_assign_pointer(dev
->ip6_ptr
, NULL
);
2640 /* Step 1.5: remove snmp6 entry */
2641 snmp6_unregister_dev(idev
);
2645 /* Step 2: clear hash table */
2646 for (i
=0; i
<IN6_ADDR_HSIZE
; i
++) {
2647 bifa
= &inet6_addr_lst
[i
];
2649 write_lock_bh(&addrconf_hash_lock
);
2650 while ((ifa
= *bifa
) != NULL
) {
2651 if (ifa
->idev
== idev
&&
2652 (how
|| !(ifa
->flags
&IFA_F_PERMANENT
) ||
2653 ipv6_addr_type(&ifa
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
2654 *bifa
= ifa
->lst_next
;
2655 ifa
->lst_next
= NULL
;
2659 bifa
= &ifa
->lst_next
;
2661 write_unlock_bh(&addrconf_hash_lock
);
2664 write_lock_bh(&idev
->lock
);
2666 /* Step 3: clear flags for stateless addrconf */
2668 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
2670 /* Step 4: clear address list */
2671 #ifdef CONFIG_IPV6_PRIVACY
2672 if (how
&& del_timer(&idev
->regen_timer
))
2675 /* clear tempaddr list */
2676 while ((ifa
= idev
->tempaddr_list
) != NULL
) {
2677 idev
->tempaddr_list
= ifa
->tmp_next
;
2678 ifa
->tmp_next
= NULL
;
2680 write_unlock_bh(&idev
->lock
);
2681 spin_lock_bh(&ifa
->lock
);
2684 in6_ifa_put(ifa
->ifpub
);
2687 spin_unlock_bh(&ifa
->lock
);
2689 write_lock_bh(&idev
->lock
);
2694 while ((ifa
= idev
->addr_list
) != NULL
) {
2695 idev
->addr_list
= ifa
->if_next
;
2696 ifa
->if_next
= NULL
;
2698 addrconf_del_timer(ifa
);
2700 /* If just doing link down, and address is permanent
2701 and not link-local, then retain it. */
2703 (ifa
->flags
&IFA_F_PERMANENT
) &&
2704 !(ipv6_addr_type(&ifa
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
2706 /* Move to holding list */
2708 bifa
= &ifa
->if_next
;
2710 /* If not doing DAD on this address, just keep it. */
2711 if ((dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
)) ||
2712 idev
->cnf
.accept_dad
<= 0 ||
2713 (ifa
->flags
& IFA_F_NODAD
))
2716 /* If it was tentative already, no need to notify */
2717 if (ifa
->flags
& IFA_F_TENTATIVE
)
2720 /* Flag it for later restoration when link comes up */
2721 ifa
->flags
|= IFA_F_TENTATIVE
;
2726 write_unlock_bh(&idev
->lock
);
2728 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
2729 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifa
);
2732 write_lock_bh(&idev
->lock
);
2735 idev
->addr_list
= keep_list
;
2737 write_unlock_bh(&idev
->lock
);
2739 /* Step 5: Discard multicast list */
2742 ipv6_mc_destroy_dev(idev
);
2746 idev
->tstamp
= jiffies
;
2748 /* Shot the device (if unregistered) */
2751 addrconf_sysctl_unregister(idev
);
2752 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
2753 neigh_ifdown(&nd_tbl
, dev
);
2759 static void addrconf_rs_timer(unsigned long data
)
2761 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2762 struct inet6_dev
*idev
= ifp
->idev
;
2764 read_lock(&idev
->lock
);
2765 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
))
2768 if (idev
->cnf
.forwarding
)
2771 /* Announcement received after solicitation was sent */
2772 if (idev
->if_flags
& IF_RA_RCVD
)
2775 spin_lock(&ifp
->lock
);
2776 if (ifp
->probes
++ < idev
->cnf
.rtr_solicits
) {
2777 /* The wait after the last probe can be shorter */
2778 addrconf_mod_timer(ifp
, AC_RS
,
2779 (ifp
->probes
== idev
->cnf
.rtr_solicits
) ?
2780 idev
->cnf
.rtr_solicit_delay
:
2781 idev
->cnf
.rtr_solicit_interval
);
2782 spin_unlock(&ifp
->lock
);
2784 ndisc_send_rs(idev
->dev
, &ifp
->addr
, &in6addr_linklocal_allrouters
);
2786 spin_unlock(&ifp
->lock
);
2788 * Note: we do not support deprecated "all on-link"
2789 * assumption any longer.
2791 printk(KERN_DEBUG
"%s: no IPv6 routers present\n",
2796 read_unlock(&idev
->lock
);
2801 * Duplicate Address Detection
2803 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
2805 unsigned long rand_num
;
2806 struct inet6_dev
*idev
= ifp
->idev
;
2808 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
2811 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
2813 ifp
->probes
= idev
->cnf
.dad_transmits
;
2814 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
2817 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
)
2819 struct inet6_dev
*idev
= ifp
->idev
;
2820 struct net_device
*dev
= idev
->dev
;
2822 addrconf_join_solict(dev
, &ifp
->addr
);
2824 net_srandom(ifp
->addr
.s6_addr32
[3]);
2826 read_lock_bh(&idev
->lock
);
2830 spin_lock(&ifp
->lock
);
2831 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
2832 idev
->cnf
.accept_dad
< 1 ||
2833 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
2834 ifp
->flags
& IFA_F_NODAD
) {
2835 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
2836 spin_unlock(&ifp
->lock
);
2837 read_unlock_bh(&idev
->lock
);
2839 addrconf_dad_completed(ifp
);
2843 if (!(idev
->if_flags
& IF_READY
)) {
2844 spin_unlock(&ifp
->lock
);
2845 read_unlock_bh(&idev
->lock
);
2847 * If the device is not ready:
2848 * - keep it tentative if it is a permanent address.
2849 * - otherwise, kill it.
2852 addrconf_dad_stop(ifp
, 0);
2857 * Optimistic nodes can start receiving
2860 if(ifp
->flags
& IFA_F_OPTIMISTIC
)
2861 ip6_ins_rt(ifp
->rt
);
2863 addrconf_dad_kick(ifp
);
2864 spin_unlock(&ifp
->lock
);
2866 read_unlock_bh(&idev
->lock
);
2869 static void addrconf_dad_timer(unsigned long data
)
2871 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2872 struct inet6_dev
*idev
= ifp
->idev
;
2873 struct in6_addr mcaddr
;
2875 read_lock(&idev
->lock
);
2876 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
)) {
2877 read_unlock(&idev
->lock
);
2881 spin_lock(&ifp
->lock
);
2882 if (ifp
->probes
== 0) {
2884 * DAD was successful
2887 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
2888 spin_unlock(&ifp
->lock
);
2889 read_unlock(&idev
->lock
);
2891 addrconf_dad_completed(ifp
);
2897 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
2898 spin_unlock(&ifp
->lock
);
2899 read_unlock(&idev
->lock
);
2901 /* send a neighbour solicitation for our addr */
2902 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
2903 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &in6addr_any
);
2908 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
2910 struct net_device
* dev
= ifp
->idev
->dev
;
2913 * Configure the address for reception. Now it is valid.
2916 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2918 /* If added prefix is link local and forwarding is off,
2919 start sending router solicitations.
2922 if (ifp
->idev
->cnf
.forwarding
== 0 &&
2923 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
2924 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
2925 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
2927 * If a host as already performed a random delay
2928 * [...] as part of DAD [...] there is no need
2929 * to delay again before sending the first RS
2931 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &in6addr_linklocal_allrouters
);
2933 spin_lock_bh(&ifp
->lock
);
2935 ifp
->idev
->if_flags
|= IF_RS_SENT
;
2936 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
2937 spin_unlock_bh(&ifp
->lock
);
2941 static void addrconf_dad_run(struct inet6_dev
*idev
) {
2942 struct inet6_ifaddr
*ifp
;
2944 read_lock_bh(&idev
->lock
);
2945 for (ifp
= idev
->addr_list
; ifp
; ifp
= ifp
->if_next
) {
2946 spin_lock(&ifp
->lock
);
2947 if (!(ifp
->flags
& IFA_F_TENTATIVE
)) {
2948 spin_unlock(&ifp
->lock
);
2951 spin_unlock(&ifp
->lock
);
2952 addrconf_dad_kick(ifp
);
2954 read_unlock_bh(&idev
->lock
);
2957 #ifdef CONFIG_PROC_FS
2958 struct if6_iter_state
{
2959 struct seq_net_private p
;
2963 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
)
2965 struct inet6_ifaddr
*ifa
= NULL
;
2966 struct if6_iter_state
*state
= seq
->private;
2967 struct net
*net
= seq_file_net(seq
);
2969 for (state
->bucket
= 0; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
2970 ifa
= inet6_addr_lst
[state
->bucket
];
2972 while (ifa
&& !net_eq(dev_net(ifa
->idev
->dev
), net
))
2973 ifa
= ifa
->lst_next
;
2980 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
, struct inet6_ifaddr
*ifa
)
2982 struct if6_iter_state
*state
= seq
->private;
2983 struct net
*net
= seq_file_net(seq
);
2985 ifa
= ifa
->lst_next
;
2988 if (!net_eq(dev_net(ifa
->idev
->dev
), net
)) {
2989 ifa
= ifa
->lst_next
;
2994 if (!ifa
&& ++state
->bucket
< IN6_ADDR_HSIZE
) {
2995 ifa
= inet6_addr_lst
[state
->bucket
];
3002 static struct inet6_ifaddr
*if6_get_idx(struct seq_file
*seq
, loff_t pos
)
3004 struct inet6_ifaddr
*ifa
= if6_get_first(seq
);
3007 while(pos
&& (ifa
= if6_get_next(seq
, ifa
)) != NULL
)
3009 return pos
? NULL
: ifa
;
3012 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
3013 __acquires(addrconf_hash_lock
)
3015 read_lock_bh(&addrconf_hash_lock
);
3016 return if6_get_idx(seq
, *pos
);
3019 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
3021 struct inet6_ifaddr
*ifa
;
3023 ifa
= if6_get_next(seq
, v
);
3028 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
3029 __releases(addrconf_hash_lock
)
3031 read_unlock_bh(&addrconf_hash_lock
);
3034 static int if6_seq_show(struct seq_file
*seq
, void *v
)
3036 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
3037 seq_printf(seq
, "%pi6 %02x %02x %02x %02x %8s\n",
3039 ifp
->idev
->dev
->ifindex
,
3043 ifp
->idev
->dev
->name
);
3047 static const struct seq_operations if6_seq_ops
= {
3048 .start
= if6_seq_start
,
3049 .next
= if6_seq_next
,
3050 .show
= if6_seq_show
,
3051 .stop
= if6_seq_stop
,
3054 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
3056 return seq_open_net(inode
, file
, &if6_seq_ops
,
3057 sizeof(struct if6_iter_state
));
3060 static const struct file_operations if6_fops
= {
3061 .owner
= THIS_MODULE
,
3062 .open
= if6_seq_open
,
3064 .llseek
= seq_lseek
,
3065 .release
= seq_release_net
,
3068 static int __net_init
if6_proc_net_init(struct net
*net
)
3070 if (!proc_net_fops_create(net
, "if_inet6", S_IRUGO
, &if6_fops
))
3075 static void __net_exit
if6_proc_net_exit(struct net
*net
)
3077 proc_net_remove(net
, "if_inet6");
3080 static struct pernet_operations if6_proc_net_ops
= {
3081 .init
= if6_proc_net_init
,
3082 .exit
= if6_proc_net_exit
,
3085 int __init
if6_proc_init(void)
3087 return register_pernet_subsys(&if6_proc_net_ops
);
3090 void if6_proc_exit(void)
3092 unregister_pernet_subsys(&if6_proc_net_ops
);
3094 #endif /* CONFIG_PROC_FS */
3096 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3097 /* Check if address is a home address configured on any interface. */
3098 int ipv6_chk_home_addr(struct net
*net
, struct in6_addr
*addr
)
3101 struct inet6_ifaddr
* ifp
;
3102 u8 hash
= ipv6_addr_hash(addr
);
3103 read_lock_bh(&addrconf_hash_lock
);
3104 for (ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
= ifp
->lst_next
) {
3105 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
3107 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
3108 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
3113 read_unlock_bh(&addrconf_hash_lock
);
3119 * Periodic address status verification
3122 static void addrconf_verify(unsigned long foo
)
3124 struct inet6_ifaddr
*ifp
;
3125 unsigned long now
, next
;
3128 spin_lock_bh(&addrconf_verify_lock
);
3130 next
= now
+ ADDR_CHECK_FREQUENCY
;
3132 del_timer(&addr_chk_timer
);
3134 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
3137 read_lock(&addrconf_hash_lock
);
3138 for (ifp
=inet6_addr_lst
[i
]; ifp
; ifp
=ifp
->lst_next
) {
3140 #ifdef CONFIG_IPV6_PRIVACY
3141 unsigned long regen_advance
;
3144 if (ifp
->flags
& IFA_F_PERMANENT
)
3147 spin_lock(&ifp
->lock
);
3148 age
= (now
- ifp
->tstamp
) / HZ
;
3150 #ifdef CONFIG_IPV6_PRIVACY
3151 regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
3152 ifp
->idev
->cnf
.dad_transmits
*
3153 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
3156 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
3157 age
>= ifp
->valid_lft
) {
3158 spin_unlock(&ifp
->lock
);
3160 read_unlock(&addrconf_hash_lock
);
3163 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
3164 spin_unlock(&ifp
->lock
);
3166 } else if (age
>= ifp
->prefered_lft
) {
3167 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
3170 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
3172 ifp
->flags
|= IFA_F_DEPRECATED
;
3175 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
3176 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
3178 spin_unlock(&ifp
->lock
);
3182 read_unlock(&addrconf_hash_lock
);
3184 ipv6_ifa_notify(0, ifp
);
3188 #ifdef CONFIG_IPV6_PRIVACY
3189 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
3190 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
3191 if (age
>= ifp
->prefered_lft
- regen_advance
) {
3192 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
3193 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3194 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3195 if (!ifp
->regen_count
&& ifpub
) {
3198 in6_ifa_hold(ifpub
);
3199 spin_unlock(&ifp
->lock
);
3200 read_unlock(&addrconf_hash_lock
);
3201 spin_lock(&ifpub
->lock
);
3202 ifpub
->regen_count
= 0;
3203 spin_unlock(&ifpub
->lock
);
3204 ipv6_create_tempaddr(ifpub
, ifp
);
3209 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
3210 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
3211 spin_unlock(&ifp
->lock
);
3214 /* ifp->prefered_lft <= ifp->valid_lft */
3215 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3216 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3217 spin_unlock(&ifp
->lock
);
3220 read_unlock(&addrconf_hash_lock
);
3223 addr_chk_timer
.expires
= time_before(next
, jiffies
+ HZ
) ? jiffies
+ HZ
: next
;
3224 add_timer(&addr_chk_timer
);
3225 spin_unlock_bh(&addrconf_verify_lock
);
3228 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
)
3230 struct in6_addr
*pfx
= NULL
;
3233 pfx
= nla_data(addr
);
3236 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
3239 pfx
= nla_data(local
);
3245 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
3246 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
3247 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
3248 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
3252 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3254 struct net
*net
= sock_net(skb
->sk
);
3255 struct ifaddrmsg
*ifm
;
3256 struct nlattr
*tb
[IFA_MAX
+1];
3257 struct in6_addr
*pfx
;
3260 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3264 ifm
= nlmsg_data(nlh
);
3265 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3269 return inet6_addr_del(net
, ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
3272 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u8 ifa_flags
,
3273 u32 prefered_lft
, u32 valid_lft
)
3277 unsigned long timeout
;
3279 if (!valid_lft
|| (prefered_lft
> valid_lft
))
3282 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
3283 if (addrconf_finite_timeout(timeout
)) {
3284 expires
= jiffies_to_clock_t(timeout
* HZ
);
3285 valid_lft
= timeout
;
3286 flags
= RTF_EXPIRES
;
3290 ifa_flags
|= IFA_F_PERMANENT
;
3293 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
3294 if (addrconf_finite_timeout(timeout
)) {
3296 ifa_flags
|= IFA_F_DEPRECATED
;
3297 prefered_lft
= timeout
;
3300 spin_lock_bh(&ifp
->lock
);
3301 ifp
->flags
= (ifp
->flags
& ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
| IFA_F_HOMEADDRESS
)) | ifa_flags
;
3302 ifp
->tstamp
= jiffies
;
3303 ifp
->valid_lft
= valid_lft
;
3304 ifp
->prefered_lft
= prefered_lft
;
3306 spin_unlock_bh(&ifp
->lock
);
3307 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
3308 ipv6_ifa_notify(0, ifp
);
3310 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
3318 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3320 struct net
*net
= sock_net(skb
->sk
);
3321 struct ifaddrmsg
*ifm
;
3322 struct nlattr
*tb
[IFA_MAX
+1];
3323 struct in6_addr
*pfx
;
3324 struct inet6_ifaddr
*ifa
;
3325 struct net_device
*dev
;
3326 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
3330 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3334 ifm
= nlmsg_data(nlh
);
3335 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3339 if (tb
[IFA_CACHEINFO
]) {
3340 struct ifa_cacheinfo
*ci
;
3342 ci
= nla_data(tb
[IFA_CACHEINFO
]);
3343 valid_lft
= ci
->ifa_valid
;
3344 preferred_lft
= ci
->ifa_prefered
;
3346 preferred_lft
= INFINITY_LIFE_TIME
;
3347 valid_lft
= INFINITY_LIFE_TIME
;
3350 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3354 /* We ignore other flags so far. */
3355 ifa_flags
= ifm
->ifa_flags
& (IFA_F_NODAD
| IFA_F_HOMEADDRESS
);
3357 ifa
= ipv6_get_ifaddr(net
, pfx
, dev
, 1);
3360 * It would be best to check for !NLM_F_CREATE here but
3361 * userspace alreay relies on not having to provide this.
3363 return inet6_addr_add(net
, ifm
->ifa_index
, pfx
,
3364 ifm
->ifa_prefixlen
, ifa_flags
,
3365 preferred_lft
, valid_lft
);
3368 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
3369 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
3372 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
3379 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u8 flags
,
3380 u8 scope
, int ifindex
)
3382 struct ifaddrmsg
*ifm
;
3384 ifm
= nlmsg_data(nlh
);
3385 ifm
->ifa_family
= AF_INET6
;
3386 ifm
->ifa_prefixlen
= prefixlen
;
3387 ifm
->ifa_flags
= flags
;
3388 ifm
->ifa_scope
= scope
;
3389 ifm
->ifa_index
= ifindex
;
3392 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
3393 unsigned long tstamp
, u32 preferred
, u32 valid
)
3395 struct ifa_cacheinfo ci
;
3397 ci
.cstamp
= (u32
)(TIME_DELTA(cstamp
, INITIAL_JIFFIES
) / HZ
* 100
3398 + TIME_DELTA(cstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3399 ci
.tstamp
= (u32
)(TIME_DELTA(tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3400 + TIME_DELTA(tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3401 ci
.ifa_prefered
= preferred
;
3402 ci
.ifa_valid
= valid
;
3404 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
3407 static inline int rt_scope(int ifa_scope
)
3409 if (ifa_scope
& IFA_HOST
)
3410 return RT_SCOPE_HOST
;
3411 else if (ifa_scope
& IFA_LINK
)
3412 return RT_SCOPE_LINK
;
3413 else if (ifa_scope
& IFA_SITE
)
3414 return RT_SCOPE_SITE
;
3416 return RT_SCOPE_UNIVERSE
;
3419 static inline int inet6_ifaddr_msgsize(void)
3421 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
3422 + nla_total_size(16) /* IFA_ADDRESS */
3423 + nla_total_size(sizeof(struct ifa_cacheinfo
));
3426 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
3427 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3429 struct nlmsghdr
*nlh
;
3430 u32 preferred
, valid
;
3432 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3436 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
3437 ifa
->idev
->dev
->ifindex
);
3439 if (!(ifa
->flags
&IFA_F_PERMANENT
)) {
3440 preferred
= ifa
->prefered_lft
;
3441 valid
= ifa
->valid_lft
;
3442 if (preferred
!= INFINITY_LIFE_TIME
) {
3443 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
3444 if (preferred
> tval
)
3448 if (valid
!= INFINITY_LIFE_TIME
)
3452 preferred
= INFINITY_LIFE_TIME
;
3453 valid
= INFINITY_LIFE_TIME
;
3456 if (nla_put(skb
, IFA_ADDRESS
, 16, &ifa
->addr
) < 0 ||
3457 put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0) {
3458 nlmsg_cancel(skb
, nlh
);
3462 return nlmsg_end(skb
, nlh
);
3465 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
3466 u32 pid
, u32 seq
, int event
, u16 flags
)
3468 struct nlmsghdr
*nlh
;
3469 u8 scope
= RT_SCOPE_UNIVERSE
;
3470 int ifindex
= ifmca
->idev
->dev
->ifindex
;
3472 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
3473 scope
= RT_SCOPE_SITE
;
3475 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3479 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3480 if (nla_put(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
) < 0 ||
3481 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
3482 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3483 nlmsg_cancel(skb
, nlh
);
3487 return nlmsg_end(skb
, nlh
);
3490 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
3491 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3493 struct nlmsghdr
*nlh
;
3494 u8 scope
= RT_SCOPE_UNIVERSE
;
3495 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
3497 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
3498 scope
= RT_SCOPE_SITE
;
3500 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3504 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3505 if (nla_put(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
) < 0 ||
3506 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
3507 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3508 nlmsg_cancel(skb
, nlh
);
3512 return nlmsg_end(skb
, nlh
);
3522 /* called with rcu_read_lock() */
3523 static int in6_dump_addrs(struct inet6_dev
*idev
, struct sk_buff
*skb
,
3524 struct netlink_callback
*cb
, enum addr_type_t type
,
3525 int s_ip_idx
, int *p_ip_idx
)
3527 struct inet6_ifaddr
*ifa
;
3528 struct ifmcaddr6
*ifmca
;
3529 struct ifacaddr6
*ifaca
;
3531 int ip_idx
= *p_ip_idx
;
3533 read_lock_bh(&idev
->lock
);
3536 /* unicast address incl. temp addr */
3537 for (ifa
= idev
->addr_list
; ifa
;
3538 ifa
= ifa
->if_next
, ip_idx
++) {
3539 if (ip_idx
< s_ip_idx
)
3541 err
= inet6_fill_ifaddr(skb
, ifa
,
3542 NETLINK_CB(cb
->skb
).pid
,
3550 case MULTICAST_ADDR
:
3551 /* multicast address */
3552 for (ifmca
= idev
->mc_list
; ifmca
;
3553 ifmca
= ifmca
->next
, ip_idx
++) {
3554 if (ip_idx
< s_ip_idx
)
3556 err
= inet6_fill_ifmcaddr(skb
, ifmca
,
3557 NETLINK_CB(cb
->skb
).pid
,
3566 /* anycast address */
3567 for (ifaca
= idev
->ac_list
; ifaca
;
3568 ifaca
= ifaca
->aca_next
, ip_idx
++) {
3569 if (ip_idx
< s_ip_idx
)
3571 err
= inet6_fill_ifacaddr(skb
, ifaca
,
3572 NETLINK_CB(cb
->skb
).pid
,
3583 read_unlock_bh(&idev
->lock
);
3588 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3589 enum addr_type_t type
)
3591 struct net
*net
= sock_net(skb
->sk
);
3594 int s_idx
, s_ip_idx
;
3595 struct net_device
*dev
;
3596 struct inet6_dev
*idev
;
3597 struct hlist_head
*head
;
3598 struct hlist_node
*node
;
3601 s_idx
= idx
= cb
->args
[1];
3602 s_ip_idx
= ip_idx
= cb
->args
[2];
3605 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
3607 head
= &net
->dev_index_head
[h
];
3608 hlist_for_each_entry_rcu(dev
, node
, head
, index_hlist
) {
3614 if ((idev
= __in6_dev_get(dev
)) == NULL
)
3617 if (in6_dump_addrs(idev
, skb
, cb
, type
,
3618 s_ip_idx
, &ip_idx
) <= 0)
3628 cb
->args
[2] = ip_idx
;
3633 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3635 enum addr_type_t type
= UNICAST_ADDR
;
3637 return inet6_dump_addr(skb
, cb
, type
);
3640 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3642 enum addr_type_t type
= MULTICAST_ADDR
;
3644 return inet6_dump_addr(skb
, cb
, type
);
3648 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3650 enum addr_type_t type
= ANYCAST_ADDR
;
3652 return inet6_dump_addr(skb
, cb
, type
);
3655 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
* nlh
,
3658 struct net
*net
= sock_net(in_skb
->sk
);
3659 struct ifaddrmsg
*ifm
;
3660 struct nlattr
*tb
[IFA_MAX
+1];
3661 struct in6_addr
*addr
= NULL
;
3662 struct net_device
*dev
= NULL
;
3663 struct inet6_ifaddr
*ifa
;
3664 struct sk_buff
*skb
;
3667 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3671 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3677 ifm
= nlmsg_data(nlh
);
3679 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3681 if ((ifa
= ipv6_get_ifaddr(net
, addr
, dev
, 1)) == NULL
) {
3682 err
= -EADDRNOTAVAIL
;
3686 if ((skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
)) == NULL
) {
3691 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).pid
,
3692 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
3694 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3695 WARN_ON(err
== -EMSGSIZE
);
3699 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).pid
);
3706 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
3708 struct sk_buff
*skb
;
3709 struct net
*net
= dev_net(ifa
->idev
->dev
);
3712 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
3716 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
3718 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3719 WARN_ON(err
== -EMSGSIZE
);
3723 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3727 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
3730 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
3731 __s32
*array
, int bytes
)
3733 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
3735 memset(array
, 0, bytes
);
3736 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
3737 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
3738 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
3739 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
3740 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
3741 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
3742 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
3743 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
3744 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] = cnf
->rtr_solicit_interval
;
3745 array
[DEVCONF_RTR_SOLICIT_DELAY
] = cnf
->rtr_solicit_delay
;
3746 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
3747 #ifdef CONFIG_IPV6_PRIVACY
3748 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
3749 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
3750 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
3751 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
3752 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
3754 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
3755 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
3756 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
3757 #ifdef CONFIG_IPV6_ROUTER_PREF
3758 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
3759 array
[DEVCONF_RTR_PROBE_INTERVAL
] = cnf
->rtr_probe_interval
;
3760 #ifdef CONFIG_IPV6_ROUTE_INFO
3761 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
3764 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
3765 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
3766 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3767 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
3769 #ifdef CONFIG_IPV6_MROUTE
3770 array
[DEVCONF_MC_FORWARDING
] = cnf
->mc_forwarding
;
3772 array
[DEVCONF_DISABLE_IPV6
] = cnf
->disable_ipv6
;
3773 array
[DEVCONF_ACCEPT_DAD
] = cnf
->accept_dad
;
3774 array
[DEVCONF_FORCE_TLLAO
] = cnf
->force_tllao
;
3777 static inline size_t inet6_if_nlmsg_size(void)
3779 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
3780 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
3781 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
3782 + nla_total_size(4) /* IFLA_MTU */
3783 + nla_total_size(4) /* IFLA_LINK */
3784 + nla_total_size( /* IFLA_PROTINFO */
3785 nla_total_size(4) /* IFLA_INET6_FLAGS */
3786 + nla_total_size(sizeof(struct ifla_cacheinfo
))
3787 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
3788 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
3789 + nla_total_size(ICMP6_MIB_MAX
* 8) /* IFLA_INET6_ICMP6STATS */
3793 static inline void __snmp6_fill_stats(u64
*stats
, void __percpu
**mib
,
3794 int items
, int bytes
)
3797 int pad
= bytes
- sizeof(u64
) * items
;
3800 /* Use put_unaligned() because stats may not be aligned for u64. */
3801 put_unaligned(items
, &stats
[0]);
3802 for (i
= 1; i
< items
; i
++)
3803 put_unaligned(snmp_fold_field(mib
, i
), &stats
[i
]);
3805 memset(&stats
[items
], 0, pad
);
3808 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
3812 case IFLA_INET6_STATS
:
3813 __snmp6_fill_stats(stats
, (void __percpu
**)idev
->stats
.ipv6
, IPSTATS_MIB_MAX
, bytes
);
3815 case IFLA_INET6_ICMP6STATS
:
3816 __snmp6_fill_stats(stats
, (void __percpu
**)idev
->stats
.icmpv6
, ICMP6_MIB_MAX
, bytes
);
3821 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3822 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3824 struct net_device
*dev
= idev
->dev
;
3826 struct ifinfomsg
*hdr
;
3827 struct nlmsghdr
*nlh
;
3829 struct ifla_cacheinfo ci
;
3831 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*hdr
), flags
);
3835 hdr
= nlmsg_data(nlh
);
3836 hdr
->ifi_family
= AF_INET6
;
3838 hdr
->ifi_type
= dev
->type
;
3839 hdr
->ifi_index
= dev
->ifindex
;
3840 hdr
->ifi_flags
= dev_get_flags(dev
);
3841 hdr
->ifi_change
= 0;
3843 NLA_PUT_STRING(skb
, IFLA_IFNAME
, dev
->name
);
3846 NLA_PUT(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
);
3848 NLA_PUT_U32(skb
, IFLA_MTU
, dev
->mtu
);
3849 if (dev
->ifindex
!= dev
->iflink
)
3850 NLA_PUT_U32(skb
, IFLA_LINK
, dev
->iflink
);
3852 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
3853 if (protoinfo
== NULL
)
3854 goto nla_put_failure
;
3856 NLA_PUT_U32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
);
3858 ci
.max_reasm_len
= IPV6_MAXPLEN
;
3859 ci
.tstamp
= (__u32
)(TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3860 + TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3861 ci
.reachable_time
= idev
->nd_parms
->reachable_time
;
3862 ci
.retrans_time
= idev
->nd_parms
->retrans_time
;
3863 NLA_PUT(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
);
3865 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
3867 goto nla_put_failure
;
3868 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
3870 /* XXX - MC not implemented */
3872 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
3874 goto nla_put_failure
;
3875 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
3877 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
3879 goto nla_put_failure
;
3880 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
3882 nla_nest_end(skb
, protoinfo
);
3883 return nlmsg_end(skb
, nlh
);
3886 nlmsg_cancel(skb
, nlh
);
3890 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3892 struct net
*net
= sock_net(skb
->sk
);
3895 struct net_device
*dev
;
3896 struct inet6_dev
*idev
;
3897 struct hlist_head
*head
;
3898 struct hlist_node
*node
;
3901 s_idx
= cb
->args
[1];
3904 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
3906 head
= &net
->dev_index_head
[h
];
3907 hlist_for_each_entry_rcu(dev
, node
, head
, index_hlist
) {
3910 idev
= __in6_dev_get(dev
);
3913 if (inet6_fill_ifinfo(skb
, idev
,
3914 NETLINK_CB(cb
->skb
).pid
,
3916 RTM_NEWLINK
, NLM_F_MULTI
) <= 0)
3930 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
3932 struct sk_buff
*skb
;
3933 struct net
*net
= dev_net(idev
->dev
);
3936 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
3940 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
3942 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3943 WARN_ON(err
== -EMSGSIZE
);
3947 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3951 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
3954 static inline size_t inet6_prefix_nlmsg_size(void)
3956 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
3957 + nla_total_size(sizeof(struct in6_addr
))
3958 + nla_total_size(sizeof(struct prefix_cacheinfo
));
3961 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3962 struct prefix_info
*pinfo
, u32 pid
, u32 seq
,
3963 int event
, unsigned int flags
)
3965 struct prefixmsg
*pmsg
;
3966 struct nlmsghdr
*nlh
;
3967 struct prefix_cacheinfo ci
;
3969 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*pmsg
), flags
);
3973 pmsg
= nlmsg_data(nlh
);
3974 pmsg
->prefix_family
= AF_INET6
;
3975 pmsg
->prefix_pad1
= 0;
3976 pmsg
->prefix_pad2
= 0;
3977 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
3978 pmsg
->prefix_len
= pinfo
->prefix_len
;
3979 pmsg
->prefix_type
= pinfo
->type
;
3980 pmsg
->prefix_pad3
= 0;
3981 pmsg
->prefix_flags
= 0;
3983 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
3984 if (pinfo
->autoconf
)
3985 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
3987 NLA_PUT(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
);
3989 ci
.preferred_time
= ntohl(pinfo
->prefered
);
3990 ci
.valid_time
= ntohl(pinfo
->valid
);
3991 NLA_PUT(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
);
3993 return nlmsg_end(skb
, nlh
);
3996 nlmsg_cancel(skb
, nlh
);
4000 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
4001 struct prefix_info
*pinfo
)
4003 struct sk_buff
*skb
;
4004 struct net
*net
= dev_net(idev
->dev
);
4007 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
4011 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
4013 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
4014 WARN_ON(err
== -EMSGSIZE
);
4018 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
4022 rtnl_set_sk_err(net
, RTNLGRP_IPV6_PREFIX
, err
);
4025 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
4027 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
4032 * If the address was optimistic
4033 * we inserted the route at the start of
4034 * our DAD process, so we don't need
4037 if (!(ifp
->rt
->rt6i_node
))
4038 ip6_ins_rt(ifp
->rt
);
4039 if (ifp
->idev
->cnf
.forwarding
)
4040 addrconf_join_anycast(ifp
);
4043 if (ifp
->idev
->cnf
.forwarding
)
4044 addrconf_leave_anycast(ifp
);
4045 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
4046 dst_hold(&ifp
->rt
->u
.dst
);
4047 if (ip6_del_rt(ifp
->rt
))
4048 dst_free(&ifp
->rt
->u
.dst
);
4053 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
4056 if (likely(ifp
->idev
->dead
== 0))
4057 __ipv6_ifa_notify(event
, ifp
);
4058 rcu_read_unlock_bh();
4061 #ifdef CONFIG_SYSCTL
4064 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
,
4065 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4067 int *valp
= ctl
->data
;
4072 ret
= proc_dointvec(ctl
, write
, buffer
, lenp
, ppos
);
4075 ret
= addrconf_fixup_forwarding(ctl
, valp
, val
);
4081 static void dev_disable_change(struct inet6_dev
*idev
)
4083 if (!idev
|| !idev
->dev
)
4086 if (idev
->cnf
.disable_ipv6
)
4087 addrconf_notify(NULL
, NETDEV_DOWN
, idev
->dev
);
4089 addrconf_notify(NULL
, NETDEV_UP
, idev
->dev
);
4092 static void addrconf_disable_change(struct net
*net
, __s32 newf
)
4094 struct net_device
*dev
;
4095 struct inet6_dev
*idev
;
4098 for_each_netdev_rcu(net
, dev
) {
4099 idev
= __in6_dev_get(dev
);
4101 int changed
= (!idev
->cnf
.disable_ipv6
) ^ (!newf
);
4102 idev
->cnf
.disable_ipv6
= newf
;
4104 dev_disable_change(idev
);
4110 static int addrconf_disable_ipv6(struct ctl_table
*table
, int *p
, int old
)
4114 net
= (struct net
*)table
->extra2
;
4116 if (p
== &net
->ipv6
.devconf_dflt
->disable_ipv6
)
4119 if (!rtnl_trylock()) {
4120 /* Restore the original values before restarting */
4122 return restart_syscall();
4125 if (p
== &net
->ipv6
.devconf_all
->disable_ipv6
) {
4126 __s32 newf
= net
->ipv6
.devconf_all
->disable_ipv6
;
4127 net
->ipv6
.devconf_dflt
->disable_ipv6
= newf
;
4128 addrconf_disable_change(net
, newf
);
4129 } else if ((!*p
) ^ (!old
))
4130 dev_disable_change((struct inet6_dev
*)table
->extra1
);
4137 int addrconf_sysctl_disable(ctl_table
*ctl
, int write
,
4138 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4140 int *valp
= ctl
->data
;
4145 ret
= proc_dointvec(ctl
, write
, buffer
, lenp
, ppos
);
4148 ret
= addrconf_disable_ipv6(ctl
, valp
, val
);
4154 static struct addrconf_sysctl_table
4156 struct ctl_table_header
*sysctl_header
;
4157 ctl_table addrconf_vars
[DEVCONF_MAX
+1];
4159 } addrconf_sysctl __read_mostly
= {
4160 .sysctl_header
= NULL
,
4163 .procname
= "forwarding",
4164 .data
= &ipv6_devconf
.forwarding
,
4165 .maxlen
= sizeof(int),
4167 .proc_handler
= addrconf_sysctl_forward
,
4170 .procname
= "hop_limit",
4171 .data
= &ipv6_devconf
.hop_limit
,
4172 .maxlen
= sizeof(int),
4174 .proc_handler
= proc_dointvec
,
4178 .data
= &ipv6_devconf
.mtu6
,
4179 .maxlen
= sizeof(int),
4181 .proc_handler
= proc_dointvec
,
4184 .procname
= "accept_ra",
4185 .data
= &ipv6_devconf
.accept_ra
,
4186 .maxlen
= sizeof(int),
4188 .proc_handler
= proc_dointvec
,
4191 .procname
= "accept_redirects",
4192 .data
= &ipv6_devconf
.accept_redirects
,
4193 .maxlen
= sizeof(int),
4195 .proc_handler
= proc_dointvec
,
4198 .procname
= "autoconf",
4199 .data
= &ipv6_devconf
.autoconf
,
4200 .maxlen
= sizeof(int),
4202 .proc_handler
= proc_dointvec
,
4205 .procname
= "dad_transmits",
4206 .data
= &ipv6_devconf
.dad_transmits
,
4207 .maxlen
= sizeof(int),
4209 .proc_handler
= proc_dointvec
,
4212 .procname
= "router_solicitations",
4213 .data
= &ipv6_devconf
.rtr_solicits
,
4214 .maxlen
= sizeof(int),
4216 .proc_handler
= proc_dointvec
,
4219 .procname
= "router_solicitation_interval",
4220 .data
= &ipv6_devconf
.rtr_solicit_interval
,
4221 .maxlen
= sizeof(int),
4223 .proc_handler
= proc_dointvec_jiffies
,
4226 .procname
= "router_solicitation_delay",
4227 .data
= &ipv6_devconf
.rtr_solicit_delay
,
4228 .maxlen
= sizeof(int),
4230 .proc_handler
= proc_dointvec_jiffies
,
4233 .procname
= "force_mld_version",
4234 .data
= &ipv6_devconf
.force_mld_version
,
4235 .maxlen
= sizeof(int),
4237 .proc_handler
= proc_dointvec
,
4239 #ifdef CONFIG_IPV6_PRIVACY
4241 .procname
= "use_tempaddr",
4242 .data
= &ipv6_devconf
.use_tempaddr
,
4243 .maxlen
= sizeof(int),
4245 .proc_handler
= proc_dointvec
,
4248 .procname
= "temp_valid_lft",
4249 .data
= &ipv6_devconf
.temp_valid_lft
,
4250 .maxlen
= sizeof(int),
4252 .proc_handler
= proc_dointvec
,
4255 .procname
= "temp_prefered_lft",
4256 .data
= &ipv6_devconf
.temp_prefered_lft
,
4257 .maxlen
= sizeof(int),
4259 .proc_handler
= proc_dointvec
,
4262 .procname
= "regen_max_retry",
4263 .data
= &ipv6_devconf
.regen_max_retry
,
4264 .maxlen
= sizeof(int),
4266 .proc_handler
= proc_dointvec
,
4269 .procname
= "max_desync_factor",
4270 .data
= &ipv6_devconf
.max_desync_factor
,
4271 .maxlen
= sizeof(int),
4273 .proc_handler
= proc_dointvec
,
4277 .procname
= "max_addresses",
4278 .data
= &ipv6_devconf
.max_addresses
,
4279 .maxlen
= sizeof(int),
4281 .proc_handler
= proc_dointvec
,
4284 .procname
= "accept_ra_defrtr",
4285 .data
= &ipv6_devconf
.accept_ra_defrtr
,
4286 .maxlen
= sizeof(int),
4288 .proc_handler
= proc_dointvec
,
4291 .procname
= "accept_ra_pinfo",
4292 .data
= &ipv6_devconf
.accept_ra_pinfo
,
4293 .maxlen
= sizeof(int),
4295 .proc_handler
= proc_dointvec
,
4297 #ifdef CONFIG_IPV6_ROUTER_PREF
4299 .procname
= "accept_ra_rtr_pref",
4300 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
4301 .maxlen
= sizeof(int),
4303 .proc_handler
= proc_dointvec
,
4306 .procname
= "router_probe_interval",
4307 .data
= &ipv6_devconf
.rtr_probe_interval
,
4308 .maxlen
= sizeof(int),
4310 .proc_handler
= proc_dointvec_jiffies
,
4312 #ifdef CONFIG_IPV6_ROUTE_INFO
4314 .procname
= "accept_ra_rt_info_max_plen",
4315 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
4316 .maxlen
= sizeof(int),
4318 .proc_handler
= proc_dointvec
,
4323 .procname
= "proxy_ndp",
4324 .data
= &ipv6_devconf
.proxy_ndp
,
4325 .maxlen
= sizeof(int),
4327 .proc_handler
= proc_dointvec
,
4330 .procname
= "accept_source_route",
4331 .data
= &ipv6_devconf
.accept_source_route
,
4332 .maxlen
= sizeof(int),
4334 .proc_handler
= proc_dointvec
,
4336 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4338 .procname
= "optimistic_dad",
4339 .data
= &ipv6_devconf
.optimistic_dad
,
4340 .maxlen
= sizeof(int),
4342 .proc_handler
= proc_dointvec
,
4346 #ifdef CONFIG_IPV6_MROUTE
4348 .procname
= "mc_forwarding",
4349 .data
= &ipv6_devconf
.mc_forwarding
,
4350 .maxlen
= sizeof(int),
4352 .proc_handler
= proc_dointvec
,
4356 .procname
= "disable_ipv6",
4357 .data
= &ipv6_devconf
.disable_ipv6
,
4358 .maxlen
= sizeof(int),
4360 .proc_handler
= addrconf_sysctl_disable
,
4363 .procname
= "accept_dad",
4364 .data
= &ipv6_devconf
.accept_dad
,
4365 .maxlen
= sizeof(int),
4367 .proc_handler
= proc_dointvec
,
4370 .procname
= "force_tllao",
4371 .data
= &ipv6_devconf
.force_tllao
,
4372 .maxlen
= sizeof(int),
4374 .proc_handler
= proc_dointvec
4382 static int __addrconf_sysctl_register(struct net
*net
, char *dev_name
,
4383 struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
4386 struct addrconf_sysctl_table
*t
;
4388 #define ADDRCONF_CTL_PATH_DEV 3
4390 struct ctl_path addrconf_ctl_path
[] = {
4391 { .procname
= "net", },
4392 { .procname
= "ipv6", },
4393 { .procname
= "conf", },
4394 { /* to be set */ },
4399 t
= kmemdup(&addrconf_sysctl
, sizeof(*t
), GFP_KERNEL
);
4403 for (i
=0; t
->addrconf_vars
[i
].data
; i
++) {
4404 t
->addrconf_vars
[i
].data
+= (char*)p
- (char*)&ipv6_devconf
;
4405 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
4406 t
->addrconf_vars
[i
].extra2
= net
;
4410 * Make a copy of dev_name, because '.procname' is regarded as const
4411 * by sysctl and we wouldn't want anyone to change it under our feet
4412 * (see SIOCSIFNAME).
4414 t
->dev_name
= kstrdup(dev_name
, GFP_KERNEL
);
4418 addrconf_ctl_path
[ADDRCONF_CTL_PATH_DEV
].procname
= t
->dev_name
;
4420 t
->sysctl_header
= register_net_sysctl_table(net
, addrconf_ctl_path
,
4422 if (t
->sysctl_header
== NULL
)
4436 static void __addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
4438 struct addrconf_sysctl_table
*t
;
4440 if (p
->sysctl
== NULL
)
4445 unregister_sysctl_table(t
->sysctl_header
);
4450 static void addrconf_sysctl_register(struct inet6_dev
*idev
)
4452 neigh_sysctl_register(idev
->dev
, idev
->nd_parms
, "ipv6",
4453 &ndisc_ifinfo_sysctl_change
);
4454 __addrconf_sysctl_register(dev_net(idev
->dev
), idev
->dev
->name
,
4458 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
4460 __addrconf_sysctl_unregister(&idev
->cnf
);
4461 neigh_sysctl_unregister(idev
->nd_parms
);
4467 static int __net_init
addrconf_init_net(struct net
*net
)
4470 struct ipv6_devconf
*all
, *dflt
;
4473 all
= &ipv6_devconf
;
4474 dflt
= &ipv6_devconf_dflt
;
4476 if (!net_eq(net
, &init_net
)) {
4477 all
= kmemdup(all
, sizeof(ipv6_devconf
), GFP_KERNEL
);
4481 dflt
= kmemdup(dflt
, sizeof(ipv6_devconf_dflt
), GFP_KERNEL
);
4483 goto err_alloc_dflt
;
4485 /* these will be inherited by all namespaces */
4486 dflt
->autoconf
= ipv6_defaults
.autoconf
;
4487 dflt
->disable_ipv6
= ipv6_defaults
.disable_ipv6
;
4490 net
->ipv6
.devconf_all
= all
;
4491 net
->ipv6
.devconf_dflt
= dflt
;
4493 #ifdef CONFIG_SYSCTL
4494 err
= __addrconf_sysctl_register(net
, "all", NULL
, all
);
4498 err
= __addrconf_sysctl_register(net
, "default", NULL
, dflt
);
4504 #ifdef CONFIG_SYSCTL
4506 __addrconf_sysctl_unregister(all
);
4516 static void __net_exit
addrconf_exit_net(struct net
*net
)
4518 #ifdef CONFIG_SYSCTL
4519 __addrconf_sysctl_unregister(net
->ipv6
.devconf_dflt
);
4520 __addrconf_sysctl_unregister(net
->ipv6
.devconf_all
);
4522 if (!net_eq(net
, &init_net
)) {
4523 kfree(net
->ipv6
.devconf_dflt
);
4524 kfree(net
->ipv6
.devconf_all
);
4528 static struct pernet_operations addrconf_ops
= {
4529 .init
= addrconf_init_net
,
4530 .exit
= addrconf_exit_net
,
4537 int register_inet6addr_notifier(struct notifier_block
*nb
)
4539 return atomic_notifier_chain_register(&inet6addr_chain
, nb
);
4542 EXPORT_SYMBOL(register_inet6addr_notifier
);
4544 int unregister_inet6addr_notifier(struct notifier_block
*nb
)
4546 return atomic_notifier_chain_unregister(&inet6addr_chain
,nb
);
4549 EXPORT_SYMBOL(unregister_inet6addr_notifier
);
4552 * Init / cleanup code
4555 int __init
addrconf_init(void)
4559 if ((err
= ipv6_addr_label_init()) < 0) {
4560 printk(KERN_CRIT
"IPv6 Addrconf: cannot initialize default policy table: %d.\n",
4565 register_pernet_subsys(&addrconf_ops
);
4567 /* The addrconf netdev notifier requires that loopback_dev
4568 * has it's ipv6 private information allocated and setup
4569 * before it can bring up and give link-local addresses
4570 * to other devices which are up.
4572 * Unfortunately, loopback_dev is not necessarily the first
4573 * entry in the global dev_base list of net devices. In fact,
4574 * it is likely to be the very last entry on that list.
4575 * So this causes the notifier registry below to try and
4576 * give link-local addresses to all devices besides loopback_dev
4577 * first, then loopback_dev, which cases all the non-loopback_dev
4578 * devices to fail to get a link-local address.
4580 * So, as a temporary fix, allocate the ipv6 structure for
4581 * loopback_dev first by hand.
4582 * Longer term, all of the dependencies ipv6 has upon the loopback
4583 * device and it being up should be removed.
4586 if (!ipv6_add_dev(init_net
.loopback_dev
))
4592 register_netdevice_notifier(&ipv6_dev_notf
);
4596 err
= __rtnl_register(PF_INET6
, RTM_GETLINK
, NULL
, inet6_dump_ifinfo
);
4600 /* Only the first call to __rtnl_register can fail */
4601 __rtnl_register(PF_INET6
, RTM_NEWADDR
, inet6_rtm_newaddr
, NULL
);
4602 __rtnl_register(PF_INET6
, RTM_DELADDR
, inet6_rtm_deladdr
, NULL
);
4603 __rtnl_register(PF_INET6
, RTM_GETADDR
, inet6_rtm_getaddr
, inet6_dump_ifaddr
);
4604 __rtnl_register(PF_INET6
, RTM_GETMULTICAST
, NULL
, inet6_dump_ifmcaddr
);
4605 __rtnl_register(PF_INET6
, RTM_GETANYCAST
, NULL
, inet6_dump_ifacaddr
);
4607 ipv6_addr_label_rtnl_register();
4611 unregister_netdevice_notifier(&ipv6_dev_notf
);
4613 unregister_pernet_subsys(&addrconf_ops
);
4618 void addrconf_cleanup(void)
4620 struct inet6_ifaddr
*ifa
;
4621 struct net_device
*dev
;
4624 unregister_netdevice_notifier(&ipv6_dev_notf
);
4625 unregister_pernet_subsys(&addrconf_ops
);
4629 /* clean dev list */
4630 for_each_netdev(&init_net
, dev
) {
4631 if (__in6_dev_get(dev
) == NULL
)
4633 addrconf_ifdown(dev
, 1);
4635 addrconf_ifdown(init_net
.loopback_dev
, 2);
4640 write_lock_bh(&addrconf_hash_lock
);
4641 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
4642 for (ifa
=inet6_addr_lst
[i
]; ifa
; ) {
4643 struct inet6_ifaddr
*bifa
;
4646 ifa
= ifa
->lst_next
;
4647 printk(KERN_DEBUG
"bug: IPv6 address leakage detected: ifa=%p\n", bifa
);
4648 /* Do not free it; something is wrong.
4649 Now we can investigate it with debugger.
4653 write_unlock_bh(&addrconf_hash_lock
);
4655 del_timer(&addr_chk_timer
);