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 **)idev
->stats
.ipv6
,
282 sizeof(struct ipstats_mib
)) < 0)
284 if (snmp_mib_init((void **)idev
->stats
.icmpv6
,
285 sizeof(struct icmpv6_mib
)) < 0)
287 if (snmp_mib_init((void **)idev
->stats
.icmpv6msg
,
288 sizeof(struct icmpv6msg_mib
)) < 0)
294 snmp_mib_free((void **)idev
->stats
.icmpv6
);
296 snmp_mib_free((void **)idev
->stats
.ipv6
);
301 static void snmp6_free_dev(struct inet6_dev
*idev
)
303 snmp_mib_free((void **)idev
->stats
.icmpv6msg
);
304 snmp_mib_free((void **)idev
->stats
.icmpv6
);
305 snmp_mib_free((void **)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
;
484 read_lock(&dev_base_lock
);
485 for_each_netdev(net
, dev
) {
487 idev
= __in6_dev_get(dev
);
489 int changed
= (!idev
->cnf
.forwarding
) ^ (!newf
);
490 idev
->cnf
.forwarding
= newf
;
492 dev_forward_change(idev
);
496 read_unlock(&dev_base_lock
);
499 static int addrconf_fixup_forwarding(struct ctl_table
*table
, int *p
, int old
)
503 net
= (struct net
*)table
->extra2
;
504 if (p
== &net
->ipv6
.devconf_dflt
->forwarding
)
507 if (!rtnl_trylock()) {
508 /* Restore the original values before restarting */
510 return restart_syscall();
513 if (p
== &net
->ipv6
.devconf_all
->forwarding
) {
514 __s32 newf
= net
->ipv6
.devconf_all
->forwarding
;
515 net
->ipv6
.devconf_dflt
->forwarding
= newf
;
516 addrconf_forward_change(net
, newf
);
517 } else if ((!*p
) ^ (!old
))
518 dev_forward_change((struct inet6_dev
*)table
->extra1
);
522 rt6_purge_dflt_routers(net
);
527 /* Nobody refers to this ifaddr, destroy it */
529 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
531 WARN_ON(ifp
->if_next
!= NULL
);
532 WARN_ON(ifp
->lst_next
!= NULL
);
534 #ifdef NET_REFCNT_DEBUG
535 printk(KERN_DEBUG
"inet6_ifa_finish_destroy\n");
538 in6_dev_put(ifp
->idev
);
540 if (del_timer(&ifp
->timer
))
541 printk("Timer is still running, when freeing ifa=%p\n", ifp
);
544 printk("Freeing alive inet6 address %p\n", ifp
);
547 dst_release(&ifp
->rt
->u
.dst
);
553 ipv6_link_dev_addr(struct inet6_dev
*idev
, struct inet6_ifaddr
*ifp
)
555 struct inet6_ifaddr
*ifa
, **ifap
;
556 int ifp_scope
= ipv6_addr_src_scope(&ifp
->addr
);
559 * Each device address list is sorted in order of scope -
560 * global before linklocal.
562 for (ifap
= &idev
->addr_list
; (ifa
= *ifap
) != NULL
;
563 ifap
= &ifa
->if_next
) {
564 if (ifp_scope
>= ipv6_addr_src_scope(&ifa
->addr
))
568 ifp
->if_next
= *ifap
;
573 * Hash function taken from net_alias.c
575 static u8
ipv6_addr_hash(const struct in6_addr
*addr
)
580 * We perform the hash function over the last 64 bits of the address
581 * This will include the IEEE address token on links that support it.
584 word
= (__force u32
)(addr
->s6_addr32
[2] ^ addr
->s6_addr32
[3]);
585 word
^= (word
>> 16);
588 return ((word
^ (word
>> 4)) & 0x0f);
591 /* On success it returns ifp with increased reference count */
593 static struct inet6_ifaddr
*
594 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
, int pfxlen
,
595 int scope
, u32 flags
)
597 struct inet6_ifaddr
*ifa
= NULL
;
601 int addr_type
= ipv6_addr_type(addr
);
603 if (addr_type
== IPV6_ADDR_ANY
||
604 addr_type
& IPV6_ADDR_MULTICAST
||
605 (!(idev
->dev
->flags
& IFF_LOOPBACK
) &&
606 addr_type
& IPV6_ADDR_LOOPBACK
))
607 return ERR_PTR(-EADDRNOTAVAIL
);
611 err
= -ENODEV
; /*XXX*/
615 if (idev
->cnf
.disable_ipv6
) {
620 write_lock(&addrconf_hash_lock
);
622 /* Ignore adding duplicate addresses on an interface */
623 if (ipv6_chk_same_addr(dev_net(idev
->dev
), addr
, idev
->dev
)) {
624 ADBG(("ipv6_add_addr: already assigned\n"));
629 ifa
= kzalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
632 ADBG(("ipv6_add_addr: malloc failed\n"));
637 rt
= addrconf_dst_alloc(idev
, addr
, 0);
643 ipv6_addr_copy(&ifa
->addr
, addr
);
645 spin_lock_init(&ifa
->lock
);
646 init_timer(&ifa
->timer
);
647 ifa
->timer
.data
= (unsigned long) ifa
;
649 ifa
->prefix_len
= pfxlen
;
650 ifa
->flags
= flags
| IFA_F_TENTATIVE
;
651 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
656 * part one of RFC 4429, section 3.3
657 * We should not configure an address as
658 * optimistic if we do not yet know the link
659 * layer address of our nexhop router
662 if (rt
->rt6i_nexthop
== NULL
)
663 ifa
->flags
&= ~IFA_F_OPTIMISTIC
;
670 /* Add to big hash table */
671 hash
= ipv6_addr_hash(addr
);
673 ifa
->lst_next
= inet6_addr_lst
[hash
];
674 inet6_addr_lst
[hash
] = ifa
;
676 write_unlock(&addrconf_hash_lock
);
678 write_lock(&idev
->lock
);
679 /* Add to inet6_dev unicast addr list. */
680 ipv6_link_dev_addr(idev
, ifa
);
682 #ifdef CONFIG_IPV6_PRIVACY
683 if (ifa
->flags
&IFA_F_TEMPORARY
) {
684 ifa
->tmp_next
= idev
->tempaddr_list
;
685 idev
->tempaddr_list
= ifa
;
691 write_unlock(&idev
->lock
);
693 rcu_read_unlock_bh();
695 if (likely(err
== 0))
696 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_UP
, ifa
);
704 write_unlock(&addrconf_hash_lock
);
708 /* This function wants to get referenced ifp and releases it before return */
710 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
712 struct inet6_ifaddr
*ifa
, **ifap
;
713 struct inet6_dev
*idev
= ifp
->idev
;
715 int deleted
= 0, onlink
= 0;
716 unsigned long expires
= jiffies
;
718 hash
= ipv6_addr_hash(&ifp
->addr
);
722 write_lock_bh(&addrconf_hash_lock
);
723 for (ifap
= &inet6_addr_lst
[hash
]; (ifa
=*ifap
) != NULL
;
724 ifap
= &ifa
->lst_next
) {
726 *ifap
= ifa
->lst_next
;
728 ifa
->lst_next
= NULL
;
732 write_unlock_bh(&addrconf_hash_lock
);
734 write_lock_bh(&idev
->lock
);
735 #ifdef CONFIG_IPV6_PRIVACY
736 if (ifp
->flags
&IFA_F_TEMPORARY
) {
737 for (ifap
= &idev
->tempaddr_list
; (ifa
=*ifap
) != NULL
;
738 ifap
= &ifa
->tmp_next
) {
740 *ifap
= ifa
->tmp_next
;
742 in6_ifa_put(ifp
->ifpub
);
746 ifa
->tmp_next
= NULL
;
753 for (ifap
= &idev
->addr_list
; (ifa
=*ifap
) != NULL
;) {
755 *ifap
= ifa
->if_next
;
758 if (!(ifp
->flags
& IFA_F_PERMANENT
) || onlink
> 0)
762 } else if (ifp
->flags
& IFA_F_PERMANENT
) {
763 if (ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
765 if (ifa
->flags
& IFA_F_PERMANENT
) {
770 unsigned long lifetime
;
775 spin_lock(&ifa
->lock
);
777 lifetime
= addrconf_timeout_fixup(ifa
->valid_lft
, HZ
);
779 * Note: Because this address is
780 * not permanent, lifetime <
781 * LONG_MAX / HZ here.
783 if (time_before(expires
,
784 ifa
->tstamp
+ lifetime
* HZ
))
785 expires
= ifa
->tstamp
+ lifetime
* HZ
;
786 spin_unlock(&ifa
->lock
);
790 ifap
= &ifa
->if_next
;
792 write_unlock_bh(&idev
->lock
);
794 addrconf_del_timer(ifp
);
796 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
798 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifp
);
801 * Purge or update corresponding prefix
803 * 1) we don't purge prefix here if address was not permanent.
804 * prefix is managed by its own lifetime.
805 * 2) if there're no addresses, delete prefix.
806 * 3) if there're still other permanent address(es),
807 * corresponding prefix is still permanent.
808 * 4) otherwise, update prefix lifetime to the
809 * longest valid lifetime among the corresponding
810 * addresses on the device.
811 * Note: subsequent RA will update lifetime.
815 if ((ifp
->flags
& IFA_F_PERMANENT
) && onlink
< 1) {
816 struct in6_addr prefix
;
818 struct net
*net
= dev_net(ifp
->idev
->dev
);
819 ipv6_addr_prefix(&prefix
, &ifp
->addr
, ifp
->prefix_len
);
820 rt
= rt6_lookup(net
, &prefix
, NULL
, ifp
->idev
->dev
->ifindex
, 1);
822 if (rt
&& addrconf_is_prefix_route(rt
)) {
826 } else if (!(rt
->rt6i_flags
& RTF_EXPIRES
)) {
827 rt
->rt6i_expires
= expires
;
828 rt
->rt6i_flags
|= RTF_EXPIRES
;
831 dst_release(&rt
->u
.dst
);
837 #ifdef CONFIG_IPV6_PRIVACY
838 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
840 struct inet6_dev
*idev
= ifp
->idev
;
841 struct in6_addr addr
, *tmpaddr
;
842 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_cstamp
, tmp_tstamp
;
843 unsigned long regen_advance
;
849 write_lock(&idev
->lock
);
851 spin_lock_bh(&ift
->lock
);
852 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
853 spin_unlock_bh(&ift
->lock
);
860 if (idev
->cnf
.use_tempaddr
<= 0) {
861 write_unlock(&idev
->lock
);
863 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
868 spin_lock_bh(&ifp
->lock
);
869 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
870 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
871 spin_unlock_bh(&ifp
->lock
);
872 write_unlock(&idev
->lock
);
874 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
880 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
881 if (__ipv6_try_regen_rndid(idev
, tmpaddr
) < 0) {
882 spin_unlock_bh(&ifp
->lock
);
883 write_unlock(&idev
->lock
);
885 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
891 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
892 tmp_valid_lft
= min_t(__u32
,
894 idev
->cnf
.temp_valid_lft
);
895 tmp_prefered_lft
= min_t(__u32
,
897 idev
->cnf
.temp_prefered_lft
- desync_factor
/ HZ
);
898 tmp_plen
= ifp
->prefix_len
;
899 max_addresses
= idev
->cnf
.max_addresses
;
900 tmp_cstamp
= ifp
->cstamp
;
901 tmp_tstamp
= ifp
->tstamp
;
902 spin_unlock_bh(&ifp
->lock
);
904 regen_advance
= idev
->cnf
.regen_max_retry
*
905 idev
->cnf
.dad_transmits
*
906 idev
->nd_parms
->retrans_time
/ HZ
;
907 write_unlock(&idev
->lock
);
909 /* A temporary address is created only if this calculated Preferred
910 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
911 * an implementation must not create a temporary address with a zero
912 * Preferred Lifetime.
914 if (tmp_prefered_lft
<= regen_advance
) {
921 addr_flags
= IFA_F_TEMPORARY
;
922 /* set in addrconf_prefix_rcv() */
923 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
924 addr_flags
|= IFA_F_OPTIMISTIC
;
926 ift
= !max_addresses
||
927 ipv6_count_addresses(idev
) < max_addresses
?
928 ipv6_add_addr(idev
, &addr
, tmp_plen
,
929 ipv6_addr_type(&addr
)&IPV6_ADDR_SCOPE_MASK
,
931 if (!ift
|| IS_ERR(ift
)) {
935 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
937 write_lock(&idev
->lock
);
941 spin_lock_bh(&ift
->lock
);
943 ift
->valid_lft
= tmp_valid_lft
;
944 ift
->prefered_lft
= tmp_prefered_lft
;
945 ift
->cstamp
= tmp_cstamp
;
946 ift
->tstamp
= tmp_tstamp
;
947 spin_unlock_bh(&ift
->lock
);
949 addrconf_dad_start(ift
, 0);
958 * Choose an appropriate source address (RFC3484)
961 IPV6_SADDR_RULE_INIT
= 0,
962 IPV6_SADDR_RULE_LOCAL
,
963 IPV6_SADDR_RULE_SCOPE
,
964 IPV6_SADDR_RULE_PREFERRED
,
965 #ifdef CONFIG_IPV6_MIP6
969 IPV6_SADDR_RULE_LABEL
,
970 #ifdef CONFIG_IPV6_PRIVACY
971 IPV6_SADDR_RULE_PRIVACY
,
973 IPV6_SADDR_RULE_ORCHID
,
974 IPV6_SADDR_RULE_PREFIX
,
978 struct ipv6_saddr_score
{
981 struct inet6_ifaddr
*ifa
;
982 DECLARE_BITMAP(scorebits
, IPV6_SADDR_RULE_MAX
);
987 struct ipv6_saddr_dst
{
988 const struct in6_addr
*addr
;
995 static inline int ipv6_saddr_preferred(int type
)
997 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|
998 IPV6_ADDR_LOOPBACK
|IPV6_ADDR_RESERVED
))
1003 static int ipv6_get_saddr_eval(struct net
*net
,
1004 struct ipv6_saddr_score
*score
,
1005 struct ipv6_saddr_dst
*dst
,
1010 if (i
<= score
->rule
) {
1012 case IPV6_SADDR_RULE_SCOPE
:
1013 ret
= score
->scopedist
;
1015 case IPV6_SADDR_RULE_PREFIX
:
1016 ret
= score
->matchlen
;
1019 ret
= !!test_bit(i
, score
->scorebits
);
1025 case IPV6_SADDR_RULE_INIT
:
1026 /* Rule 0: remember if hiscore is not ready yet */
1029 case IPV6_SADDR_RULE_LOCAL
:
1030 /* Rule 1: Prefer same address */
1031 ret
= ipv6_addr_equal(&score
->ifa
->addr
, dst
->addr
);
1033 case IPV6_SADDR_RULE_SCOPE
:
1034 /* Rule 2: Prefer appropriate scope
1039 * ---+--+-+---> scope
1041 * | d is scope of the destination.
1043 * | \ <- smaller scope is better if
1044 * B-15 | \ if scope is enough for destinaion.
1045 * | ret = B - scope (-1 <= scope >= d <= 15).
1047 * |/ <- greater is better
1048 * -C / if scope is not enough for destination.
1049 * /| ret = scope - C (-1 <= d < scope <= 15).
1051 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1052 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1053 * Assume B = 0 and we get C > 29.
1055 ret
= __ipv6_addr_src_scope(score
->addr_type
);
1056 if (ret
>= dst
->scope
)
1059 ret
-= 128; /* 30 is enough */
1060 score
->scopedist
= ret
;
1062 case IPV6_SADDR_RULE_PREFERRED
:
1063 /* Rule 3: Avoid deprecated and optimistic addresses */
1064 ret
= ipv6_saddr_preferred(score
->addr_type
) ||
1065 !(score
->ifa
->flags
& (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
));
1067 #ifdef CONFIG_IPV6_MIP6
1068 case IPV6_SADDR_RULE_HOA
:
1070 /* Rule 4: Prefer home address */
1071 int prefhome
= !(dst
->prefs
& IPV6_PREFER_SRC_COA
);
1072 ret
= !(score
->ifa
->flags
& IFA_F_HOMEADDRESS
) ^ prefhome
;
1076 case IPV6_SADDR_RULE_OIF
:
1077 /* Rule 5: Prefer outgoing interface */
1078 ret
= (!dst
->ifindex
||
1079 dst
->ifindex
== score
->ifa
->idev
->dev
->ifindex
);
1081 case IPV6_SADDR_RULE_LABEL
:
1082 /* Rule 6: Prefer matching label */
1083 ret
= ipv6_addr_label(net
,
1084 &score
->ifa
->addr
, score
->addr_type
,
1085 score
->ifa
->idev
->dev
->ifindex
) == dst
->label
;
1087 #ifdef CONFIG_IPV6_PRIVACY
1088 case IPV6_SADDR_RULE_PRIVACY
:
1090 /* Rule 7: Prefer public address
1091 * Note: prefer temprary address if use_tempaddr >= 2
1093 int preftmp
= dst
->prefs
& (IPV6_PREFER_SRC_PUBLIC
|IPV6_PREFER_SRC_TMP
) ?
1094 !!(dst
->prefs
& IPV6_PREFER_SRC_TMP
) :
1095 score
->ifa
->idev
->cnf
.use_tempaddr
>= 2;
1096 ret
= (!(score
->ifa
->flags
& IFA_F_TEMPORARY
)) ^ preftmp
;
1100 case IPV6_SADDR_RULE_ORCHID
:
1101 /* Rule 8-: Prefer ORCHID vs ORCHID or
1102 * non-ORCHID vs non-ORCHID
1104 ret
= !(ipv6_addr_orchid(&score
->ifa
->addr
) ^
1105 ipv6_addr_orchid(dst
->addr
));
1107 case IPV6_SADDR_RULE_PREFIX
:
1108 /* Rule 8: Use longest matching prefix */
1109 score
->matchlen
= ret
= ipv6_addr_diff(&score
->ifa
->addr
,
1117 __set_bit(i
, score
->scorebits
);
1123 int ipv6_dev_get_saddr(struct net
*net
, struct net_device
*dst_dev
,
1124 const struct in6_addr
*daddr
, unsigned int prefs
,
1125 struct in6_addr
*saddr
)
1127 struct ipv6_saddr_score scores
[2],
1128 *score
= &scores
[0], *hiscore
= &scores
[1];
1129 struct ipv6_saddr_dst dst
;
1130 struct net_device
*dev
;
1133 dst_type
= __ipv6_addr_type(daddr
);
1135 dst
.ifindex
= dst_dev
? dst_dev
->ifindex
: 0;
1136 dst
.scope
= __ipv6_addr_src_scope(dst_type
);
1137 dst
.label
= ipv6_addr_label(net
, daddr
, dst_type
, dst
.ifindex
);
1141 hiscore
->ifa
= NULL
;
1143 read_lock(&dev_base_lock
);
1146 for_each_netdev(net
, dev
) {
1147 struct inet6_dev
*idev
;
1149 /* Candidate Source Address (section 4)
1150 * - multicast and link-local destination address,
1151 * the set of candidate source address MUST only
1152 * include addresses assigned to interfaces
1153 * belonging to the same link as the outgoing
1155 * (- For site-local destination addresses, the
1156 * set of candidate source addresses MUST only
1157 * include addresses assigned to interfaces
1158 * belonging to the same site as the outgoing
1161 if (((dst_type
& IPV6_ADDR_MULTICAST
) ||
1162 dst
.scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
) &&
1163 dst
.ifindex
&& dev
->ifindex
!= dst
.ifindex
)
1166 idev
= __in6_dev_get(dev
);
1170 read_lock_bh(&idev
->lock
);
1171 for (score
->ifa
= idev
->addr_list
; score
->ifa
; score
->ifa
= score
->ifa
->if_next
) {
1175 * - Tentative Address (RFC2462 section 5.4)
1176 * - A tentative address is not considered
1177 * "assigned to an interface" in the traditional
1178 * sense, unless it is also flagged as optimistic.
1179 * - Candidate Source Address (section 4)
1180 * - In any case, anycast addresses, multicast
1181 * addresses, and the unspecified address MUST
1182 * NOT be included in a candidate set.
1184 if ((score
->ifa
->flags
& IFA_F_TENTATIVE
) &&
1185 (!(score
->ifa
->flags
& IFA_F_OPTIMISTIC
)))
1188 score
->addr_type
= __ipv6_addr_type(&score
->ifa
->addr
);
1190 if (unlikely(score
->addr_type
== IPV6_ADDR_ANY
||
1191 score
->addr_type
& IPV6_ADDR_MULTICAST
)) {
1192 LIMIT_NETDEBUG(KERN_DEBUG
1193 "ADDRCONF: unspecified / multicast address "
1194 "assigned as unicast address on %s",
1200 bitmap_zero(score
->scorebits
, IPV6_SADDR_RULE_MAX
);
1202 for (i
= 0; i
< IPV6_SADDR_RULE_MAX
; i
++) {
1203 int minihiscore
, miniscore
;
1205 minihiscore
= ipv6_get_saddr_eval(net
, hiscore
, &dst
, i
);
1206 miniscore
= ipv6_get_saddr_eval(net
, score
, &dst
, i
);
1208 if (minihiscore
> miniscore
) {
1209 if (i
== IPV6_SADDR_RULE_SCOPE
&&
1210 score
->scopedist
> 0) {
1213 * each remaining entry
1214 * has too small (not enough)
1215 * scope, because ifa entries
1216 * are sorted by their scope
1222 } else if (minihiscore
< miniscore
) {
1224 in6_ifa_put(hiscore
->ifa
);
1226 in6_ifa_hold(score
->ifa
);
1228 swap(hiscore
, score
);
1230 /* restore our iterator */
1231 score
->ifa
= hiscore
->ifa
;
1238 read_unlock_bh(&idev
->lock
);
1241 read_unlock(&dev_base_lock
);
1244 return -EADDRNOTAVAIL
;
1246 ipv6_addr_copy(saddr
, &hiscore
->ifa
->addr
);
1247 in6_ifa_put(hiscore
->ifa
);
1251 EXPORT_SYMBOL(ipv6_dev_get_saddr
);
1253 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1254 unsigned char banned_flags
)
1256 struct inet6_dev
*idev
;
1257 int err
= -EADDRNOTAVAIL
;
1260 if ((idev
= __in6_dev_get(dev
)) != NULL
) {
1261 struct inet6_ifaddr
*ifp
;
1263 read_lock_bh(&idev
->lock
);
1264 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1265 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
& banned_flags
)) {
1266 ipv6_addr_copy(addr
, &ifp
->addr
);
1271 read_unlock_bh(&idev
->lock
);
1277 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1280 struct inet6_ifaddr
*ifp
;
1282 read_lock_bh(&idev
->lock
);
1283 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
)
1285 read_unlock_bh(&idev
->lock
);
1289 int ipv6_chk_addr(struct net
*net
, struct in6_addr
*addr
,
1290 struct net_device
*dev
, int strict
)
1292 struct inet6_ifaddr
* ifp
;
1293 u8 hash
= ipv6_addr_hash(addr
);
1295 read_lock_bh(&addrconf_hash_lock
);
1296 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1297 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1299 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1300 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1301 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1302 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))
1306 read_unlock_bh(&addrconf_hash_lock
);
1309 EXPORT_SYMBOL(ipv6_chk_addr
);
1312 int ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
1313 struct net_device
*dev
)
1315 struct inet6_ifaddr
* ifp
;
1316 u8 hash
= ipv6_addr_hash(addr
);
1318 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1319 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1321 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1322 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1329 int ipv6_chk_prefix(struct in6_addr
*addr
, struct net_device
*dev
)
1331 struct inet6_dev
*idev
;
1332 struct inet6_ifaddr
*ifa
;
1337 idev
= __in6_dev_get(dev
);
1339 read_lock_bh(&idev
->lock
);
1340 for (ifa
= idev
->addr_list
; ifa
; ifa
= ifa
->if_next
) {
1341 onlink
= ipv6_prefix_equal(addr
, &ifa
->addr
,
1346 read_unlock_bh(&idev
->lock
);
1352 EXPORT_SYMBOL(ipv6_chk_prefix
);
1354 struct inet6_ifaddr
*ipv6_get_ifaddr(struct net
*net
, const struct in6_addr
*addr
,
1355 struct net_device
*dev
, int strict
)
1357 struct inet6_ifaddr
* ifp
;
1358 u8 hash
= ipv6_addr_hash(addr
);
1360 read_lock_bh(&addrconf_hash_lock
);
1361 for(ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
=ifp
->lst_next
) {
1362 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1364 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1365 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1366 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1372 read_unlock_bh(&addrconf_hash_lock
);
1377 /* Gets referenced address, destroys ifaddr */
1379 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
, int dad_failed
)
1381 if (ifp
->flags
&IFA_F_PERMANENT
) {
1382 spin_lock_bh(&ifp
->lock
);
1383 addrconf_del_timer(ifp
);
1384 ifp
->flags
|= IFA_F_TENTATIVE
;
1386 ifp
->flags
|= IFA_F_DADFAILED
;
1387 spin_unlock_bh(&ifp
->lock
);
1389 #ifdef CONFIG_IPV6_PRIVACY
1390 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1391 struct inet6_ifaddr
*ifpub
;
1392 spin_lock_bh(&ifp
->lock
);
1395 in6_ifa_hold(ifpub
);
1396 spin_unlock_bh(&ifp
->lock
);
1397 ipv6_create_tempaddr(ifpub
, ifp
);
1400 spin_unlock_bh(&ifp
->lock
);
1408 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1410 struct inet6_dev
*idev
= ifp
->idev
;
1412 if (net_ratelimit())
1413 printk(KERN_INFO
"%s: IPv6 duplicate address %pI6c detected!\n",
1414 ifp
->idev
->dev
->name
, &ifp
->addr
);
1416 if (idev
->cnf
.accept_dad
> 1 && !idev
->cnf
.disable_ipv6
) {
1417 struct in6_addr addr
;
1419 addr
.s6_addr32
[0] = htonl(0xfe800000);
1420 addr
.s6_addr32
[1] = 0;
1422 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) &&
1423 ipv6_addr_equal(&ifp
->addr
, &addr
)) {
1424 /* DAD failed for link-local based on MAC address */
1425 idev
->cnf
.disable_ipv6
= 1;
1427 printk(KERN_INFO
"%s: IPv6 being disabled!\n",
1428 ifp
->idev
->dev
->name
);
1432 addrconf_dad_stop(ifp
, 1);
1435 /* Join to solicited addr multicast group. */
1437 void addrconf_join_solict(struct net_device
*dev
, struct in6_addr
*addr
)
1439 struct in6_addr maddr
;
1441 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1444 addrconf_addr_solict_mult(addr
, &maddr
);
1445 ipv6_dev_mc_inc(dev
, &maddr
);
1448 void addrconf_leave_solict(struct inet6_dev
*idev
, struct in6_addr
*addr
)
1450 struct in6_addr maddr
;
1452 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1455 addrconf_addr_solict_mult(addr
, &maddr
);
1456 __ipv6_dev_mc_dec(idev
, &maddr
);
1459 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1461 struct in6_addr addr
;
1462 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1463 if (ipv6_addr_any(&addr
))
1465 ipv6_dev_ac_inc(ifp
->idev
->dev
, &addr
);
1468 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1470 struct in6_addr addr
;
1471 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1472 if (ipv6_addr_any(&addr
))
1474 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1477 static int addrconf_ifid_eui48(u8
*eui
, struct net_device
*dev
)
1479 if (dev
->addr_len
!= ETH_ALEN
)
1481 memcpy(eui
, dev
->dev_addr
, 3);
1482 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1485 * The zSeries OSA network cards can be shared among various
1486 * OS instances, but the OSA cards have only one MAC address.
1487 * This leads to duplicate address conflicts in conjunction
1488 * with IPv6 if more than one instance uses the same card.
1490 * The driver for these cards can deliver a unique 16-bit
1491 * identifier for each instance sharing the same card. It is
1492 * placed instead of 0xFFFE in the interface identifier. The
1493 * "u" bit of the interface identifier is not inverted in this
1494 * case. Hence the resulting interface identifier has local
1495 * scope according to RFC2373.
1498 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1499 eui
[4] = dev
->dev_id
& 0xFF;
1508 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
1510 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1511 if (dev
->addr_len
!= ARCNET_ALEN
)
1514 eui
[7] = *(u8
*)dev
->dev_addr
;
1518 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
1520 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1522 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1527 int __ipv6_isatap_ifid(u8
*eui
, __be32 addr
)
1531 eui
[0] = (ipv4_is_zeronet(addr
) || ipv4_is_private_10(addr
) ||
1532 ipv4_is_loopback(addr
) || ipv4_is_linklocal_169(addr
) ||
1533 ipv4_is_private_172(addr
) || ipv4_is_test_192(addr
) ||
1534 ipv4_is_anycast_6to4(addr
) || ipv4_is_private_192(addr
) ||
1535 ipv4_is_test_198(addr
) || ipv4_is_multicast(addr
) ||
1536 ipv4_is_lbcast(addr
)) ? 0x00 : 0x02;
1540 memcpy(eui
+ 4, &addr
, 4);
1543 EXPORT_SYMBOL(__ipv6_isatap_ifid
);
1545 static int addrconf_ifid_sit(u8
*eui
, struct net_device
*dev
)
1547 if (dev
->priv_flags
& IFF_ISATAP
)
1548 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
1552 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1554 switch (dev
->type
) {
1557 case ARPHRD_IEEE802_TR
:
1558 return addrconf_ifid_eui48(eui
, dev
);
1560 return addrconf_ifid_arcnet(eui
, dev
);
1561 case ARPHRD_INFINIBAND
:
1562 return addrconf_ifid_infiniband(eui
, dev
);
1564 return addrconf_ifid_sit(eui
, dev
);
1569 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1572 struct inet6_ifaddr
*ifp
;
1574 read_lock_bh(&idev
->lock
);
1575 for (ifp
=idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
1576 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1577 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1582 read_unlock_bh(&idev
->lock
);
1586 #ifdef CONFIG_IPV6_PRIVACY
1587 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1588 static int __ipv6_regen_rndid(struct inet6_dev
*idev
)
1591 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
1592 idev
->rndid
[0] &= ~0x02;
1595 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1596 * check if generated address is not inappropriate
1598 * - Reserved subnet anycast (RFC 2526)
1599 * 11111101 11....11 1xxxxxxx
1600 * - ISATAP (RFC4214) 6.1
1601 * 00-00-5E-FE-xx-xx-xx-xx
1603 * - XXX: already assigned to an address on the device
1605 if (idev
->rndid
[0] == 0xfd &&
1606 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1607 (idev
->rndid
[7]&0x80))
1609 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1610 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1612 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1619 static void ipv6_regen_rndid(unsigned long data
)
1621 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1622 unsigned long expires
;
1625 write_lock_bh(&idev
->lock
);
1630 if (__ipv6_regen_rndid(idev
) < 0)
1634 idev
->cnf
.temp_prefered_lft
* HZ
-
1635 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
- desync_factor
;
1636 if (time_before(expires
, jiffies
)) {
1638 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1643 if (!mod_timer(&idev
->regen_timer
, expires
))
1647 write_unlock_bh(&idev
->lock
);
1648 rcu_read_unlock_bh();
1652 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
) {
1655 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1656 ret
= __ipv6_regen_rndid(idev
);
1666 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1667 unsigned long expires
, u32 flags
)
1669 struct fib6_config cfg
= {
1670 .fc_table
= RT6_TABLE_PREFIX
,
1671 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1672 .fc_ifindex
= dev
->ifindex
,
1673 .fc_expires
= expires
,
1675 .fc_flags
= RTF_UP
| flags
,
1676 .fc_nlinfo
.nl_net
= dev_net(dev
),
1677 .fc_protocol
= RTPROT_KERNEL
,
1680 ipv6_addr_copy(&cfg
.fc_dst
, pfx
);
1682 /* Prevent useless cloning on PtP SIT.
1683 This thing is done here expecting that the whole
1684 class of non-broadcast devices need not cloning.
1686 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1687 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
1688 cfg
.fc_flags
|= RTF_NONEXTHOP
;
1691 ip6_route_add(&cfg
);
1694 /* Create "default" multicast route to the interface */
1696 static void addrconf_add_mroute(struct net_device
*dev
)
1698 struct fib6_config cfg
= {
1699 .fc_table
= RT6_TABLE_LOCAL
,
1700 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1701 .fc_ifindex
= dev
->ifindex
,
1704 .fc_nlinfo
.nl_net
= dev_net(dev
),
1707 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
1709 ip6_route_add(&cfg
);
1712 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1713 static void sit_route_add(struct net_device
*dev
)
1715 struct fib6_config cfg
= {
1716 .fc_table
= RT6_TABLE_MAIN
,
1717 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1718 .fc_ifindex
= dev
->ifindex
,
1720 .fc_flags
= RTF_UP
| RTF_NONEXTHOP
,
1721 .fc_nlinfo
.nl_net
= dev_net(dev
),
1724 /* prefix length - 96 bits "::d.d.d.d" */
1725 ip6_route_add(&cfg
);
1729 static void addrconf_add_lroute(struct net_device
*dev
)
1731 struct in6_addr addr
;
1733 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
1734 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
1737 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
1739 struct inet6_dev
*idev
;
1743 if ((idev
= ipv6_find_idev(dev
)) == NULL
)
1746 /* Add default multicast route */
1747 addrconf_add_mroute(dev
);
1749 /* Add link local route */
1750 addrconf_add_lroute(dev
);
1754 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
)
1756 struct prefix_info
*pinfo
;
1760 struct inet6_dev
*in6_dev
;
1761 struct net
*net
= dev_net(dev
);
1763 pinfo
= (struct prefix_info
*) opt
;
1765 if (len
< sizeof(struct prefix_info
)) {
1766 ADBG(("addrconf: prefix option too short\n"));
1771 * Validation checks ([ADDRCONF], page 19)
1774 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
1776 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
1779 valid_lft
= ntohl(pinfo
->valid
);
1780 prefered_lft
= ntohl(pinfo
->prefered
);
1782 if (prefered_lft
> valid_lft
) {
1783 if (net_ratelimit())
1784 printk(KERN_WARNING
"addrconf: prefix option has invalid lifetime\n");
1788 in6_dev
= in6_dev_get(dev
);
1790 if (in6_dev
== NULL
) {
1791 if (net_ratelimit())
1792 printk(KERN_DEBUG
"addrconf: device %s not configured\n", dev
->name
);
1797 * Two things going on here:
1798 * 1) Add routes for on-link prefixes
1799 * 2) Configure prefixes with the auto flag set
1802 if (pinfo
->onlink
) {
1803 struct rt6_info
*rt
;
1804 unsigned long rt_expires
;
1806 /* Avoid arithmetic overflow. Really, we could
1807 * save rt_expires in seconds, likely valid_lft,
1808 * but it would require division in fib gc, that it
1812 rt_expires
= addrconf_timeout_fixup(valid_lft
, HZ
);
1814 rt_expires
= addrconf_timeout_fixup(valid_lft
, USER_HZ
);
1816 if (addrconf_finite_timeout(rt_expires
))
1819 rt
= rt6_lookup(net
, &pinfo
->prefix
, NULL
,
1822 if (rt
&& addrconf_is_prefix_route(rt
)) {
1823 /* Autoconf prefix route */
1824 if (valid_lft
== 0) {
1827 } else if (addrconf_finite_timeout(rt_expires
)) {
1829 rt
->rt6i_expires
= jiffies
+ rt_expires
;
1830 rt
->rt6i_flags
|= RTF_EXPIRES
;
1832 rt
->rt6i_flags
&= ~RTF_EXPIRES
;
1833 rt
->rt6i_expires
= 0;
1835 } else if (valid_lft
) {
1836 clock_t expires
= 0;
1837 int flags
= RTF_ADDRCONF
| RTF_PREFIX_RT
;
1838 if (addrconf_finite_timeout(rt_expires
)) {
1840 flags
|= RTF_EXPIRES
;
1841 expires
= jiffies_to_clock_t(rt_expires
);
1843 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
1844 dev
, expires
, flags
);
1847 dst_release(&rt
->u
.dst
);
1850 /* Try to figure out our local address for this prefix */
1852 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
1853 struct inet6_ifaddr
* ifp
;
1854 struct in6_addr addr
;
1855 int create
= 0, update_lft
= 0;
1857 if (pinfo
->prefix_len
== 64) {
1858 memcpy(&addr
, &pinfo
->prefix
, 8);
1859 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
1860 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
1861 in6_dev_put(in6_dev
);
1866 if (net_ratelimit())
1867 printk(KERN_DEBUG
"IPv6 addrconf: prefix with wrong length %d\n",
1869 in6_dev_put(in6_dev
);
1874 ifp
= ipv6_get_ifaddr(net
, &addr
, dev
, 1);
1876 if (ifp
== NULL
&& valid_lft
) {
1877 int max_addresses
= in6_dev
->cnf
.max_addresses
;
1880 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1881 if (in6_dev
->cnf
.optimistic_dad
&&
1882 !net
->ipv6
.devconf_all
->forwarding
)
1883 addr_flags
= IFA_F_OPTIMISTIC
;
1886 /* Do not allow to create too much of autoconfigured
1887 * addresses; this would be too easy way to crash kernel.
1889 if (!max_addresses
||
1890 ipv6_count_addresses(in6_dev
) < max_addresses
)
1891 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
1892 addr_type
&IPV6_ADDR_SCOPE_MASK
,
1895 if (!ifp
|| IS_ERR(ifp
)) {
1896 in6_dev_put(in6_dev
);
1900 update_lft
= create
= 1;
1901 ifp
->cstamp
= jiffies
;
1902 addrconf_dad_start(ifp
, RTF_ADDRCONF
|RTF_PREFIX_RT
);
1908 #ifdef CONFIG_IPV6_PRIVACY
1909 struct inet6_ifaddr
*ift
;
1913 /* update lifetime (RFC2462 5.5.3 e) */
1914 spin_lock(&ifp
->lock
);
1916 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
1917 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
1920 if (!update_lft
&& stored_lft
) {
1921 if (valid_lft
> MIN_VALID_LIFETIME
||
1922 valid_lft
> stored_lft
)
1924 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
1925 /* valid_lft <= stored_lft is always true */
1927 * RFC 4862 Section 5.5.3e:
1928 * "Note that the preferred lifetime of
1929 * the corresponding address is always
1930 * reset to the Preferred Lifetime in
1931 * the received Prefix Information
1932 * option, regardless of whether the
1933 * valid lifetime is also reset or
1936 * So if the preferred lifetime in
1937 * this advertisement is different
1938 * than what we have stored, but the
1939 * valid lifetime is invalid, just
1940 * reset prefered_lft.
1942 * We must set the valid lifetime
1943 * to the stored lifetime since we'll
1944 * be updating the timestamp below,
1945 * else we'll set it back to the
1948 if (prefered_lft
!= ifp
->prefered_lft
) {
1949 valid_lft
= stored_lft
;
1953 valid_lft
= MIN_VALID_LIFETIME
;
1954 if (valid_lft
< prefered_lft
)
1955 prefered_lft
= valid_lft
;
1961 ifp
->valid_lft
= valid_lft
;
1962 ifp
->prefered_lft
= prefered_lft
;
1965 ifp
->flags
&= ~IFA_F_DEPRECATED
;
1966 spin_unlock(&ifp
->lock
);
1968 if (!(flags
&IFA_F_TENTATIVE
))
1969 ipv6_ifa_notify(0, ifp
);
1971 spin_unlock(&ifp
->lock
);
1973 #ifdef CONFIG_IPV6_PRIVACY
1974 read_lock_bh(&in6_dev
->lock
);
1975 /* update all temporary addresses in the list */
1976 for (ift
=in6_dev
->tempaddr_list
; ift
; ift
=ift
->tmp_next
) {
1978 * When adjusting the lifetimes of an existing
1979 * temporary address, only lower the lifetimes.
1980 * Implementations must not increase the
1981 * lifetimes of an existing temporary address
1982 * when processing a Prefix Information Option.
1984 if (ifp
!= ift
->ifpub
)
1987 spin_lock(&ift
->lock
);
1989 if (ift
->valid_lft
> valid_lft
&&
1990 ift
->valid_lft
- valid_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1991 ift
->valid_lft
= valid_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1992 if (ift
->prefered_lft
> prefered_lft
&&
1993 ift
->prefered_lft
- prefered_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1994 ift
->prefered_lft
= prefered_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1995 spin_unlock(&ift
->lock
);
1996 if (!(flags
&IFA_F_TENTATIVE
))
1997 ipv6_ifa_notify(0, ift
);
2000 if (create
&& in6_dev
->cnf
.use_tempaddr
> 0) {
2002 * When a new public address is created as described in [ADDRCONF],
2003 * also create a new temporary address.
2005 read_unlock_bh(&in6_dev
->lock
);
2006 ipv6_create_tempaddr(ifp
, NULL
);
2008 read_unlock_bh(&in6_dev
->lock
);
2015 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
2016 in6_dev_put(in6_dev
);
2020 * Set destination address.
2021 * Special case for SIT interfaces where we create a new "virtual"
2024 int addrconf_set_dstaddr(struct net
*net
, void __user
*arg
)
2026 struct in6_ifreq ireq
;
2027 struct net_device
*dev
;
2033 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2036 dev
= __dev_get_by_index(net
, ireq
.ifr6_ifindex
);
2042 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2043 if (dev
->type
== ARPHRD_SIT
) {
2044 const struct net_device_ops
*ops
= dev
->netdev_ops
;
2046 struct ip_tunnel_parm p
;
2048 err
= -EADDRNOTAVAIL
;
2049 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
2052 memset(&p
, 0, sizeof(p
));
2053 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
2057 p
.iph
.protocol
= IPPROTO_IPV6
;
2059 ifr
.ifr_ifru
.ifru_data
= (__force
void __user
*)&p
;
2061 if (ops
->ndo_do_ioctl
) {
2062 mm_segment_t oldfs
= get_fs();
2065 err
= ops
->ndo_do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
2072 dev
= __dev_get_by_name(net
, p
.name
);
2075 err
= dev_open(dev
);
2086 * Manual configuration of address on an interface
2088 static int inet6_addr_add(struct net
*net
, int ifindex
, struct in6_addr
*pfx
,
2089 unsigned int plen
, __u8 ifa_flags
, __u32 prefered_lft
,
2092 struct inet6_ifaddr
*ifp
;
2093 struct inet6_dev
*idev
;
2094 struct net_device
*dev
;
2098 unsigned long timeout
;
2105 /* check the lifetime */
2106 if (!valid_lft
|| prefered_lft
> valid_lft
)
2109 dev
= __dev_get_by_index(net
, ifindex
);
2113 if ((idev
= addrconf_add_dev(dev
)) == NULL
)
2116 scope
= ipv6_addr_scope(pfx
);
2118 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
2119 if (addrconf_finite_timeout(timeout
)) {
2120 expires
= jiffies_to_clock_t(timeout
* HZ
);
2121 valid_lft
= timeout
;
2122 flags
= RTF_EXPIRES
;
2126 ifa_flags
|= IFA_F_PERMANENT
;
2129 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
2130 if (addrconf_finite_timeout(timeout
)) {
2132 ifa_flags
|= IFA_F_DEPRECATED
;
2133 prefered_lft
= timeout
;
2136 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, ifa_flags
);
2139 spin_lock_bh(&ifp
->lock
);
2140 ifp
->valid_lft
= valid_lft
;
2141 ifp
->prefered_lft
= prefered_lft
;
2142 ifp
->tstamp
= jiffies
;
2143 spin_unlock_bh(&ifp
->lock
);
2145 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
2148 * Note that section 3.1 of RFC 4429 indicates
2149 * that the Optimistic flag should not be set for
2150 * manually configured addresses
2152 addrconf_dad_start(ifp
, 0);
2158 return PTR_ERR(ifp
);
2161 static int inet6_addr_del(struct net
*net
, int ifindex
, struct in6_addr
*pfx
,
2164 struct inet6_ifaddr
*ifp
;
2165 struct inet6_dev
*idev
;
2166 struct net_device
*dev
;
2171 dev
= __dev_get_by_index(net
, ifindex
);
2175 if ((idev
= __in6_dev_get(dev
)) == NULL
)
2178 read_lock_bh(&idev
->lock
);
2179 for (ifp
= idev
->addr_list
; ifp
; ifp
=ifp
->if_next
) {
2180 if (ifp
->prefix_len
== plen
&&
2181 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
2183 read_unlock_bh(&idev
->lock
);
2187 /* If the last address is deleted administratively,
2188 disable IPv6 on this interface.
2190 if (idev
->addr_list
== NULL
)
2191 addrconf_ifdown(idev
->dev
, 1);
2195 read_unlock_bh(&idev
->lock
);
2196 return -EADDRNOTAVAIL
;
2200 int addrconf_add_ifaddr(struct net
*net
, void __user
*arg
)
2202 struct in6_ifreq ireq
;
2205 if (!capable(CAP_NET_ADMIN
))
2208 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2212 err
= inet6_addr_add(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2213 ireq
.ifr6_prefixlen
, IFA_F_PERMANENT
,
2214 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2219 int addrconf_del_ifaddr(struct net
*net
, void __user
*arg
)
2221 struct in6_ifreq ireq
;
2224 if (!capable(CAP_NET_ADMIN
))
2227 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2231 err
= inet6_addr_del(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2232 ireq
.ifr6_prefixlen
);
2237 static void add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
2238 int plen
, int scope
)
2240 struct inet6_ifaddr
*ifp
;
2242 ifp
= ipv6_add_addr(idev
, addr
, plen
, scope
, IFA_F_PERMANENT
);
2244 spin_lock_bh(&ifp
->lock
);
2245 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2246 spin_unlock_bh(&ifp
->lock
);
2247 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2252 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2253 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
2255 struct in6_addr addr
;
2256 struct net_device
*dev
;
2257 struct net
*net
= dev_net(idev
->dev
);
2262 memset(&addr
, 0, sizeof(struct in6_addr
));
2263 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
2265 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
2266 addr
.s6_addr32
[0] = htonl(0xfe800000);
2269 scope
= IPV6_ADDR_COMPATv4
;
2272 if (addr
.s6_addr32
[3]) {
2273 add_addr(idev
, &addr
, 128, scope
);
2277 for_each_netdev(net
, dev
) {
2278 struct in_device
* in_dev
= __in_dev_get_rtnl(dev
);
2279 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
2280 struct in_ifaddr
* ifa
;
2284 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
2287 addr
.s6_addr32
[3] = ifa
->ifa_local
;
2289 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
2291 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
2292 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2296 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2301 add_addr(idev
, &addr
, plen
, flag
);
2308 static void init_loopback(struct net_device
*dev
)
2310 struct inet6_dev
*idev
;
2316 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2317 printk(KERN_DEBUG
"init loopback: add_dev failed\n");
2321 add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
);
2324 static void addrconf_add_linklocal(struct inet6_dev
*idev
, struct in6_addr
*addr
)
2326 struct inet6_ifaddr
* ifp
;
2327 u32 addr_flags
= IFA_F_PERMANENT
;
2329 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2330 if (idev
->cnf
.optimistic_dad
&&
2331 !dev_net(idev
->dev
)->ipv6
.devconf_all
->forwarding
)
2332 addr_flags
|= IFA_F_OPTIMISTIC
;
2336 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, addr_flags
);
2338 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
2339 addrconf_dad_start(ifp
, 0);
2344 static void addrconf_dev_config(struct net_device
*dev
)
2346 struct in6_addr addr
;
2347 struct inet6_dev
* idev
;
2351 if ((dev
->type
!= ARPHRD_ETHER
) &&
2352 (dev
->type
!= ARPHRD_FDDI
) &&
2353 (dev
->type
!= ARPHRD_IEEE802_TR
) &&
2354 (dev
->type
!= ARPHRD_ARCNET
) &&
2355 (dev
->type
!= ARPHRD_INFINIBAND
)) {
2356 /* Alas, we support only Ethernet autoconfiguration. */
2360 idev
= addrconf_add_dev(dev
);
2364 memset(&addr
, 0, sizeof(struct in6_addr
));
2365 addr
.s6_addr32
[0] = htonl(0xFE800000);
2367 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
2368 addrconf_add_linklocal(idev
, &addr
);
2371 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2372 static void addrconf_sit_config(struct net_device
*dev
)
2374 struct inet6_dev
*idev
;
2379 * Configure the tunnel with one of our IPv4
2380 * addresses... we should configure all of
2381 * our v4 addrs in the tunnel
2384 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2385 printk(KERN_DEBUG
"init sit: add_dev failed\n");
2389 if (dev
->priv_flags
& IFF_ISATAP
) {
2390 struct in6_addr addr
;
2392 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2393 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
2394 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
))
2395 addrconf_add_linklocal(idev
, &addr
);
2399 sit_add_v4_addrs(idev
);
2401 if (dev
->flags
&IFF_POINTOPOINT
) {
2402 addrconf_add_mroute(dev
);
2403 addrconf_add_lroute(dev
);
2410 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
2412 struct in6_addr lladdr
;
2414 if (!ipv6_get_lladdr(link_dev
, &lladdr
, IFA_F_TENTATIVE
)) {
2415 addrconf_add_linklocal(idev
, &lladdr
);
2421 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
2423 struct net_device
*link_dev
;
2424 struct net
*net
= dev_net(idev
->dev
);
2426 /* first try to inherit the link-local address from the link device */
2427 if (idev
->dev
->iflink
&&
2428 (link_dev
= __dev_get_by_index(net
, idev
->dev
->iflink
))) {
2429 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2432 /* then try to inherit it from any device */
2433 for_each_netdev(net
, link_dev
) {
2434 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2437 printk(KERN_DEBUG
"init ip6-ip6: add_linklocal failed\n");
2441 * Autoconfigure tunnel with a link-local address so routing protocols,
2442 * DHCPv6, MLD etc. can be run over the virtual link
2445 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
2447 struct inet6_dev
*idev
;
2451 if ((idev
= addrconf_add_dev(dev
)) == NULL
) {
2452 printk(KERN_DEBUG
"init ip6-ip6: add_dev failed\n");
2455 ip6_tnl_add_linklocal(idev
);
2458 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
2461 struct net_device
*dev
= (struct net_device
*) data
;
2462 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2463 int run_pending
= 0;
2467 case NETDEV_REGISTER
:
2468 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2469 idev
= ipv6_add_dev(dev
);
2471 return notifier_from_errno(-ENOMEM
);
2476 if (dev
->flags
& IFF_SLAVE
)
2479 if (event
== NETDEV_UP
) {
2480 if (!addrconf_qdisc_ok(dev
)) {
2481 /* device is not ready yet. */
2483 "ADDRCONF(NETDEV_UP): %s: "
2484 "link is not ready\n",
2489 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
)
2490 idev
= ipv6_add_dev(dev
);
2493 idev
->if_flags
|= IF_READY
;
2497 if (!addrconf_qdisc_ok(dev
)) {
2498 /* device is still not ready. */
2503 if (idev
->if_flags
& IF_READY
) {
2504 /* device is already configured. */
2507 idev
->if_flags
|= IF_READY
;
2511 "ADDRCONF(NETDEV_CHANGE): %s: "
2512 "link becomes ready\n",
2519 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2521 addrconf_sit_config(dev
);
2524 case ARPHRD_TUNNEL6
:
2525 addrconf_ip6_tnl_config(dev
);
2527 case ARPHRD_LOOPBACK
:
2532 addrconf_dev_config(dev
);
2537 addrconf_dad_run(idev
);
2539 /* If the MTU changed during the interface down, when the
2540 interface up, the changed MTU must be reflected in the
2541 idev as well as routers.
2543 if (idev
->cnf
.mtu6
!= dev
->mtu
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2544 rt6_mtu_change(dev
, dev
->mtu
);
2545 idev
->cnf
.mtu6
= dev
->mtu
;
2547 idev
->tstamp
= jiffies
;
2548 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2549 /* If the changed mtu during down is lower than IPV6_MIN_MTU
2550 stop IPv6 on this interface.
2552 if (dev
->mtu
< IPV6_MIN_MTU
)
2553 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2557 case NETDEV_CHANGEMTU
:
2558 if (idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2559 rt6_mtu_change(dev
, dev
->mtu
);
2560 idev
->cnf
.mtu6
= dev
->mtu
;
2564 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2565 idev
= ipv6_add_dev(dev
);
2570 /* MTU falled under IPV6_MIN_MTU. Stop IPv6 on this interface. */
2573 case NETDEV_UNREGISTER
:
2575 * Remove all addresses from this interface.
2577 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2580 case NETDEV_CHANGENAME
:
2582 snmp6_unregister_dev(idev
);
2583 addrconf_sysctl_unregister(idev
);
2584 addrconf_sysctl_register(idev
);
2585 err
= snmp6_register_dev(idev
);
2587 return notifier_from_errno(err
);
2590 case NETDEV_BONDING_OLDTYPE
:
2591 case NETDEV_BONDING_NEWTYPE
:
2592 addrconf_bonding_change(dev
, event
);
2600 * addrconf module should be notified of a device going up
2602 static struct notifier_block ipv6_dev_notf
= {
2603 .notifier_call
= addrconf_notify
,
2607 static void addrconf_bonding_change(struct net_device
*dev
, unsigned long event
)
2609 struct inet6_dev
*idev
;
2612 idev
= __in6_dev_get(dev
);
2614 if (event
== NETDEV_BONDING_NEWTYPE
)
2615 ipv6_mc_remap(idev
);
2616 else if (event
== NETDEV_BONDING_OLDTYPE
)
2617 ipv6_mc_unmap(idev
);
2620 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2622 struct inet6_dev
*idev
;
2623 struct inet6_ifaddr
*ifa
, **bifa
;
2624 struct net
*net
= dev_net(dev
);
2629 rt6_ifdown(net
, dev
);
2630 neigh_ifdown(&nd_tbl
, dev
);
2632 idev
= __in6_dev_get(dev
);
2636 /* Step 1: remove reference to ipv6 device from parent device.
2642 /* protected by rtnl_lock */
2643 rcu_assign_pointer(dev
->ip6_ptr
, NULL
);
2645 /* Step 1.5: remove snmp6 entry */
2646 snmp6_unregister_dev(idev
);
2650 /* Step 2: clear hash table */
2651 for (i
=0; i
<IN6_ADDR_HSIZE
; i
++) {
2652 bifa
= &inet6_addr_lst
[i
];
2654 write_lock_bh(&addrconf_hash_lock
);
2655 while ((ifa
= *bifa
) != NULL
) {
2656 if (ifa
->idev
== idev
) {
2657 *bifa
= ifa
->lst_next
;
2658 ifa
->lst_next
= NULL
;
2659 addrconf_del_timer(ifa
);
2663 bifa
= &ifa
->lst_next
;
2665 write_unlock_bh(&addrconf_hash_lock
);
2668 write_lock_bh(&idev
->lock
);
2670 /* Step 3: clear flags for stateless addrconf */
2672 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
2674 /* Step 4: clear address list */
2675 #ifdef CONFIG_IPV6_PRIVACY
2676 if (how
&& del_timer(&idev
->regen_timer
))
2679 /* clear tempaddr list */
2680 while ((ifa
= idev
->tempaddr_list
) != NULL
) {
2681 idev
->tempaddr_list
= ifa
->tmp_next
;
2682 ifa
->tmp_next
= NULL
;
2684 write_unlock_bh(&idev
->lock
);
2685 spin_lock_bh(&ifa
->lock
);
2688 in6_ifa_put(ifa
->ifpub
);
2691 spin_unlock_bh(&ifa
->lock
);
2693 write_lock_bh(&idev
->lock
);
2696 while ((ifa
= idev
->addr_list
) != NULL
) {
2697 idev
->addr_list
= ifa
->if_next
;
2698 ifa
->if_next
= NULL
;
2700 addrconf_del_timer(ifa
);
2701 write_unlock_bh(&idev
->lock
);
2703 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
2704 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifa
);
2707 write_lock_bh(&idev
->lock
);
2709 write_unlock_bh(&idev
->lock
);
2711 /* Step 5: Discard multicast list */
2714 ipv6_mc_destroy_dev(idev
);
2718 idev
->tstamp
= jiffies
;
2720 /* Shot the device (if unregistered) */
2723 addrconf_sysctl_unregister(idev
);
2724 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
2725 neigh_ifdown(&nd_tbl
, dev
);
2731 static void addrconf_rs_timer(unsigned long data
)
2733 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2735 if (ifp
->idev
->cnf
.forwarding
)
2738 if (ifp
->idev
->if_flags
& IF_RA_RCVD
) {
2740 * Announcement received after solicitation
2746 spin_lock(&ifp
->lock
);
2747 if (ifp
->probes
++ < ifp
->idev
->cnf
.rtr_solicits
) {
2748 /* The wait after the last probe can be shorter */
2749 addrconf_mod_timer(ifp
, AC_RS
,
2750 (ifp
->probes
== ifp
->idev
->cnf
.rtr_solicits
) ?
2751 ifp
->idev
->cnf
.rtr_solicit_delay
:
2752 ifp
->idev
->cnf
.rtr_solicit_interval
);
2753 spin_unlock(&ifp
->lock
);
2755 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &in6addr_linklocal_allrouters
);
2757 spin_unlock(&ifp
->lock
);
2759 * Note: we do not support deprecated "all on-link"
2760 * assumption any longer.
2762 printk(KERN_DEBUG
"%s: no IPv6 routers present\n",
2763 ifp
->idev
->dev
->name
);
2771 * Duplicate Address Detection
2773 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
2775 unsigned long rand_num
;
2776 struct inet6_dev
*idev
= ifp
->idev
;
2778 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
2781 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
2783 ifp
->probes
= idev
->cnf
.dad_transmits
;
2784 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
2787 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
)
2789 struct inet6_dev
*idev
= ifp
->idev
;
2790 struct net_device
*dev
= idev
->dev
;
2792 addrconf_join_solict(dev
, &ifp
->addr
);
2794 net_srandom(ifp
->addr
.s6_addr32
[3]);
2796 read_lock_bh(&idev
->lock
);
2799 spin_lock_bh(&ifp
->lock
);
2801 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
2802 idev
->cnf
.accept_dad
< 1 ||
2803 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
2804 ifp
->flags
& IFA_F_NODAD
) {
2805 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
2806 spin_unlock_bh(&ifp
->lock
);
2807 read_unlock_bh(&idev
->lock
);
2809 addrconf_dad_completed(ifp
);
2813 if (!(idev
->if_flags
& IF_READY
)) {
2814 spin_unlock_bh(&ifp
->lock
);
2815 read_unlock_bh(&idev
->lock
);
2817 * If the device is not ready:
2818 * - keep it tentative if it is a permanent address.
2819 * - otherwise, kill it.
2822 addrconf_dad_stop(ifp
, 0);
2827 * Optimistic nodes can start receiving
2830 if(ifp
->flags
& IFA_F_OPTIMISTIC
)
2831 ip6_ins_rt(ifp
->rt
);
2833 addrconf_dad_kick(ifp
);
2834 spin_unlock_bh(&ifp
->lock
);
2836 read_unlock_bh(&idev
->lock
);
2839 static void addrconf_dad_timer(unsigned long data
)
2841 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2842 struct inet6_dev
*idev
= ifp
->idev
;
2843 struct in6_addr mcaddr
;
2845 read_lock_bh(&idev
->lock
);
2847 read_unlock_bh(&idev
->lock
);
2850 spin_lock_bh(&ifp
->lock
);
2851 if (ifp
->probes
== 0) {
2853 * DAD was successful
2856 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
2857 spin_unlock_bh(&ifp
->lock
);
2858 read_unlock_bh(&idev
->lock
);
2860 addrconf_dad_completed(ifp
);
2866 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
2867 spin_unlock_bh(&ifp
->lock
);
2868 read_unlock_bh(&idev
->lock
);
2870 /* send a neighbour solicitation for our addr */
2871 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
2872 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &in6addr_any
);
2877 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
2879 struct net_device
* dev
= ifp
->idev
->dev
;
2882 * Configure the address for reception. Now it is valid.
2885 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2887 /* If added prefix is link local and forwarding is off,
2888 start sending router solicitations.
2891 if (ifp
->idev
->cnf
.forwarding
== 0 &&
2892 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
2893 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
2894 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
2896 * If a host as already performed a random delay
2897 * [...] as part of DAD [...] there is no need
2898 * to delay again before sending the first RS
2900 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &in6addr_linklocal_allrouters
);
2902 spin_lock_bh(&ifp
->lock
);
2904 ifp
->idev
->if_flags
|= IF_RS_SENT
;
2905 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
2906 spin_unlock_bh(&ifp
->lock
);
2910 static void addrconf_dad_run(struct inet6_dev
*idev
) {
2911 struct inet6_ifaddr
*ifp
;
2913 read_lock_bh(&idev
->lock
);
2914 for (ifp
= idev
->addr_list
; ifp
; ifp
= ifp
->if_next
) {
2915 spin_lock_bh(&ifp
->lock
);
2916 if (!(ifp
->flags
& IFA_F_TENTATIVE
)) {
2917 spin_unlock_bh(&ifp
->lock
);
2920 spin_unlock_bh(&ifp
->lock
);
2921 addrconf_dad_kick(ifp
);
2923 read_unlock_bh(&idev
->lock
);
2926 #ifdef CONFIG_PROC_FS
2927 struct if6_iter_state
{
2928 struct seq_net_private p
;
2932 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
)
2934 struct inet6_ifaddr
*ifa
= NULL
;
2935 struct if6_iter_state
*state
= seq
->private;
2936 struct net
*net
= seq_file_net(seq
);
2938 for (state
->bucket
= 0; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
2939 ifa
= inet6_addr_lst
[state
->bucket
];
2941 while (ifa
&& !net_eq(dev_net(ifa
->idev
->dev
), net
))
2942 ifa
= ifa
->lst_next
;
2949 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
, struct inet6_ifaddr
*ifa
)
2951 struct if6_iter_state
*state
= seq
->private;
2952 struct net
*net
= seq_file_net(seq
);
2954 ifa
= ifa
->lst_next
;
2957 if (!net_eq(dev_net(ifa
->idev
->dev
), net
)) {
2958 ifa
= ifa
->lst_next
;
2963 if (!ifa
&& ++state
->bucket
< IN6_ADDR_HSIZE
) {
2964 ifa
= inet6_addr_lst
[state
->bucket
];
2971 static struct inet6_ifaddr
*if6_get_idx(struct seq_file
*seq
, loff_t pos
)
2973 struct inet6_ifaddr
*ifa
= if6_get_first(seq
);
2976 while(pos
&& (ifa
= if6_get_next(seq
, ifa
)) != NULL
)
2978 return pos
? NULL
: ifa
;
2981 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2982 __acquires(addrconf_hash_lock
)
2984 read_lock_bh(&addrconf_hash_lock
);
2985 return if6_get_idx(seq
, *pos
);
2988 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2990 struct inet6_ifaddr
*ifa
;
2992 ifa
= if6_get_next(seq
, v
);
2997 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
2998 __releases(addrconf_hash_lock
)
3000 read_unlock_bh(&addrconf_hash_lock
);
3003 static int if6_seq_show(struct seq_file
*seq
, void *v
)
3005 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
3006 seq_printf(seq
, "%pi6 %02x %02x %02x %02x %8s\n",
3008 ifp
->idev
->dev
->ifindex
,
3012 ifp
->idev
->dev
->name
);
3016 static const struct seq_operations if6_seq_ops
= {
3017 .start
= if6_seq_start
,
3018 .next
= if6_seq_next
,
3019 .show
= if6_seq_show
,
3020 .stop
= if6_seq_stop
,
3023 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
3025 return seq_open_net(inode
, file
, &if6_seq_ops
,
3026 sizeof(struct if6_iter_state
));
3029 static const struct file_operations if6_fops
= {
3030 .owner
= THIS_MODULE
,
3031 .open
= if6_seq_open
,
3033 .llseek
= seq_lseek
,
3034 .release
= seq_release_net
,
3037 static int if6_proc_net_init(struct net
*net
)
3039 if (!proc_net_fops_create(net
, "if_inet6", S_IRUGO
, &if6_fops
))
3044 static void if6_proc_net_exit(struct net
*net
)
3046 proc_net_remove(net
, "if_inet6");
3049 static struct pernet_operations if6_proc_net_ops
= {
3050 .init
= if6_proc_net_init
,
3051 .exit
= if6_proc_net_exit
,
3054 int __init
if6_proc_init(void)
3056 return register_pernet_subsys(&if6_proc_net_ops
);
3059 void if6_proc_exit(void)
3061 unregister_pernet_subsys(&if6_proc_net_ops
);
3063 #endif /* CONFIG_PROC_FS */
3065 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3066 /* Check if address is a home address configured on any interface. */
3067 int ipv6_chk_home_addr(struct net
*net
, struct in6_addr
*addr
)
3070 struct inet6_ifaddr
* ifp
;
3071 u8 hash
= ipv6_addr_hash(addr
);
3072 read_lock_bh(&addrconf_hash_lock
);
3073 for (ifp
= inet6_addr_lst
[hash
]; ifp
; ifp
= ifp
->lst_next
) {
3074 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
3076 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
3077 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
3082 read_unlock_bh(&addrconf_hash_lock
);
3088 * Periodic address status verification
3091 static void addrconf_verify(unsigned long foo
)
3093 struct inet6_ifaddr
*ifp
;
3094 unsigned long now
, next
;
3097 spin_lock_bh(&addrconf_verify_lock
);
3099 next
= now
+ ADDR_CHECK_FREQUENCY
;
3101 del_timer(&addr_chk_timer
);
3103 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
3106 read_lock(&addrconf_hash_lock
);
3107 for (ifp
=inet6_addr_lst
[i
]; ifp
; ifp
=ifp
->lst_next
) {
3109 #ifdef CONFIG_IPV6_PRIVACY
3110 unsigned long regen_advance
;
3113 if (ifp
->flags
& IFA_F_PERMANENT
)
3116 spin_lock(&ifp
->lock
);
3117 age
= (now
- ifp
->tstamp
) / HZ
;
3119 #ifdef CONFIG_IPV6_PRIVACY
3120 regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
3121 ifp
->idev
->cnf
.dad_transmits
*
3122 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
3125 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
3126 age
>= ifp
->valid_lft
) {
3127 spin_unlock(&ifp
->lock
);
3129 read_unlock(&addrconf_hash_lock
);
3132 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
3133 spin_unlock(&ifp
->lock
);
3135 } else if (age
>= ifp
->prefered_lft
) {
3136 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
3139 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
3141 ifp
->flags
|= IFA_F_DEPRECATED
;
3144 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
3145 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
3147 spin_unlock(&ifp
->lock
);
3151 read_unlock(&addrconf_hash_lock
);
3153 ipv6_ifa_notify(0, ifp
);
3157 #ifdef CONFIG_IPV6_PRIVACY
3158 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
3159 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
3160 if (age
>= ifp
->prefered_lft
- regen_advance
) {
3161 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
3162 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3163 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3164 if (!ifp
->regen_count
&& ifpub
) {
3167 in6_ifa_hold(ifpub
);
3168 spin_unlock(&ifp
->lock
);
3169 read_unlock(&addrconf_hash_lock
);
3170 spin_lock(&ifpub
->lock
);
3171 ifpub
->regen_count
= 0;
3172 spin_unlock(&ifpub
->lock
);
3173 ipv6_create_tempaddr(ifpub
, ifp
);
3178 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
3179 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
3180 spin_unlock(&ifp
->lock
);
3183 /* ifp->prefered_lft <= ifp->valid_lft */
3184 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3185 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3186 spin_unlock(&ifp
->lock
);
3189 read_unlock(&addrconf_hash_lock
);
3192 addr_chk_timer
.expires
= time_before(next
, jiffies
+ HZ
) ? jiffies
+ HZ
: next
;
3193 add_timer(&addr_chk_timer
);
3194 spin_unlock_bh(&addrconf_verify_lock
);
3197 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
)
3199 struct in6_addr
*pfx
= NULL
;
3202 pfx
= nla_data(addr
);
3205 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
3208 pfx
= nla_data(local
);
3214 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
3215 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
3216 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
3217 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
3221 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3223 struct net
*net
= sock_net(skb
->sk
);
3224 struct ifaddrmsg
*ifm
;
3225 struct nlattr
*tb
[IFA_MAX
+1];
3226 struct in6_addr
*pfx
;
3229 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3233 ifm
= nlmsg_data(nlh
);
3234 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3238 return inet6_addr_del(net
, ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
3241 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u8 ifa_flags
,
3242 u32 prefered_lft
, u32 valid_lft
)
3246 unsigned long timeout
;
3248 if (!valid_lft
|| (prefered_lft
> valid_lft
))
3251 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
3252 if (addrconf_finite_timeout(timeout
)) {
3253 expires
= jiffies_to_clock_t(timeout
* HZ
);
3254 valid_lft
= timeout
;
3255 flags
= RTF_EXPIRES
;
3259 ifa_flags
|= IFA_F_PERMANENT
;
3262 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
3263 if (addrconf_finite_timeout(timeout
)) {
3265 ifa_flags
|= IFA_F_DEPRECATED
;
3266 prefered_lft
= timeout
;
3269 spin_lock_bh(&ifp
->lock
);
3270 ifp
->flags
= (ifp
->flags
& ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
| IFA_F_HOMEADDRESS
)) | ifa_flags
;
3271 ifp
->tstamp
= jiffies
;
3272 ifp
->valid_lft
= valid_lft
;
3273 ifp
->prefered_lft
= prefered_lft
;
3275 spin_unlock_bh(&ifp
->lock
);
3276 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
3277 ipv6_ifa_notify(0, ifp
);
3279 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
3287 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3289 struct net
*net
= sock_net(skb
->sk
);
3290 struct ifaddrmsg
*ifm
;
3291 struct nlattr
*tb
[IFA_MAX
+1];
3292 struct in6_addr
*pfx
;
3293 struct inet6_ifaddr
*ifa
;
3294 struct net_device
*dev
;
3295 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
3299 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3303 ifm
= nlmsg_data(nlh
);
3304 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3308 if (tb
[IFA_CACHEINFO
]) {
3309 struct ifa_cacheinfo
*ci
;
3311 ci
= nla_data(tb
[IFA_CACHEINFO
]);
3312 valid_lft
= ci
->ifa_valid
;
3313 preferred_lft
= ci
->ifa_prefered
;
3315 preferred_lft
= INFINITY_LIFE_TIME
;
3316 valid_lft
= INFINITY_LIFE_TIME
;
3319 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3323 /* We ignore other flags so far. */
3324 ifa_flags
= ifm
->ifa_flags
& (IFA_F_NODAD
| IFA_F_HOMEADDRESS
);
3326 ifa
= ipv6_get_ifaddr(net
, pfx
, dev
, 1);
3329 * It would be best to check for !NLM_F_CREATE here but
3330 * userspace alreay relies on not having to provide this.
3332 return inet6_addr_add(net
, ifm
->ifa_index
, pfx
,
3333 ifm
->ifa_prefixlen
, ifa_flags
,
3334 preferred_lft
, valid_lft
);
3337 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
3338 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
3341 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
3348 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u8 flags
,
3349 u8 scope
, int ifindex
)
3351 struct ifaddrmsg
*ifm
;
3353 ifm
= nlmsg_data(nlh
);
3354 ifm
->ifa_family
= AF_INET6
;
3355 ifm
->ifa_prefixlen
= prefixlen
;
3356 ifm
->ifa_flags
= flags
;
3357 ifm
->ifa_scope
= scope
;
3358 ifm
->ifa_index
= ifindex
;
3361 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
3362 unsigned long tstamp
, u32 preferred
, u32 valid
)
3364 struct ifa_cacheinfo ci
;
3366 ci
.cstamp
= (u32
)(TIME_DELTA(cstamp
, INITIAL_JIFFIES
) / HZ
* 100
3367 + TIME_DELTA(cstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3368 ci
.tstamp
= (u32
)(TIME_DELTA(tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3369 + TIME_DELTA(tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3370 ci
.ifa_prefered
= preferred
;
3371 ci
.ifa_valid
= valid
;
3373 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
3376 static inline int rt_scope(int ifa_scope
)
3378 if (ifa_scope
& IFA_HOST
)
3379 return RT_SCOPE_HOST
;
3380 else if (ifa_scope
& IFA_LINK
)
3381 return RT_SCOPE_LINK
;
3382 else if (ifa_scope
& IFA_SITE
)
3383 return RT_SCOPE_SITE
;
3385 return RT_SCOPE_UNIVERSE
;
3388 static inline int inet6_ifaddr_msgsize(void)
3390 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
3391 + nla_total_size(16) /* IFA_ADDRESS */
3392 + nla_total_size(sizeof(struct ifa_cacheinfo
));
3395 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
3396 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3398 struct nlmsghdr
*nlh
;
3399 u32 preferred
, valid
;
3401 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3405 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
3406 ifa
->idev
->dev
->ifindex
);
3408 if (!(ifa
->flags
&IFA_F_PERMANENT
)) {
3409 preferred
= ifa
->prefered_lft
;
3410 valid
= ifa
->valid_lft
;
3411 if (preferred
!= INFINITY_LIFE_TIME
) {
3412 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
3413 if (preferred
> tval
)
3417 if (valid
!= INFINITY_LIFE_TIME
)
3421 preferred
= INFINITY_LIFE_TIME
;
3422 valid
= INFINITY_LIFE_TIME
;
3425 if (nla_put(skb
, IFA_ADDRESS
, 16, &ifa
->addr
) < 0 ||
3426 put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0) {
3427 nlmsg_cancel(skb
, nlh
);
3431 return nlmsg_end(skb
, nlh
);
3434 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
3435 u32 pid
, u32 seq
, int event
, u16 flags
)
3437 struct nlmsghdr
*nlh
;
3438 u8 scope
= RT_SCOPE_UNIVERSE
;
3439 int ifindex
= ifmca
->idev
->dev
->ifindex
;
3441 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
3442 scope
= RT_SCOPE_SITE
;
3444 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3448 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3449 if (nla_put(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
) < 0 ||
3450 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
3451 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3452 nlmsg_cancel(skb
, nlh
);
3456 return nlmsg_end(skb
, nlh
);
3459 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
3460 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3462 struct nlmsghdr
*nlh
;
3463 u8 scope
= RT_SCOPE_UNIVERSE
;
3464 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
3466 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
3467 scope
= RT_SCOPE_SITE
;
3469 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3473 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3474 if (nla_put(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
) < 0 ||
3475 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
3476 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3477 nlmsg_cancel(skb
, nlh
);
3481 return nlmsg_end(skb
, nlh
);
3491 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3492 enum addr_type_t type
)
3495 int s_idx
, s_ip_idx
;
3497 struct net_device
*dev
;
3498 struct inet6_dev
*idev
= NULL
;
3499 struct inet6_ifaddr
*ifa
;
3500 struct ifmcaddr6
*ifmca
;
3501 struct ifacaddr6
*ifaca
;
3502 struct net
*net
= sock_net(skb
->sk
);
3504 s_idx
= cb
->args
[0];
3505 s_ip_idx
= ip_idx
= cb
->args
[1];
3508 for_each_netdev(net
, dev
) {
3514 if ((idev
= in6_dev_get(dev
)) == NULL
)
3516 read_lock_bh(&idev
->lock
);
3519 /* unicast address incl. temp addr */
3520 for (ifa
= idev
->addr_list
; ifa
;
3521 ifa
= ifa
->if_next
, ip_idx
++) {
3522 if (ip_idx
< s_ip_idx
)
3524 err
= inet6_fill_ifaddr(skb
, ifa
,
3525 NETLINK_CB(cb
->skb
).pid
,
3531 case MULTICAST_ADDR
:
3532 /* multicast address */
3533 for (ifmca
= idev
->mc_list
; ifmca
;
3534 ifmca
= ifmca
->next
, ip_idx
++) {
3535 if (ip_idx
< s_ip_idx
)
3537 err
= inet6_fill_ifmcaddr(skb
, ifmca
,
3538 NETLINK_CB(cb
->skb
).pid
,
3545 /* anycast address */
3546 for (ifaca
= idev
->ac_list
; ifaca
;
3547 ifaca
= ifaca
->aca_next
, ip_idx
++) {
3548 if (ip_idx
< s_ip_idx
)
3550 err
= inet6_fill_ifacaddr(skb
, ifaca
,
3551 NETLINK_CB(cb
->skb
).pid
,
3560 read_unlock_bh(&idev
->lock
);
3569 cb
->args
[1] = ip_idx
;
3573 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3575 enum addr_type_t type
= UNICAST_ADDR
;
3577 return inet6_dump_addr(skb
, cb
, type
);
3580 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3582 enum addr_type_t type
= MULTICAST_ADDR
;
3584 return inet6_dump_addr(skb
, cb
, type
);
3588 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3590 enum addr_type_t type
= ANYCAST_ADDR
;
3592 return inet6_dump_addr(skb
, cb
, type
);
3595 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
* nlh
,
3598 struct net
*net
= sock_net(in_skb
->sk
);
3599 struct ifaddrmsg
*ifm
;
3600 struct nlattr
*tb
[IFA_MAX
+1];
3601 struct in6_addr
*addr
= NULL
;
3602 struct net_device
*dev
= NULL
;
3603 struct inet6_ifaddr
*ifa
;
3604 struct sk_buff
*skb
;
3607 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3611 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3617 ifm
= nlmsg_data(nlh
);
3619 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3621 if ((ifa
= ipv6_get_ifaddr(net
, addr
, dev
, 1)) == NULL
) {
3622 err
= -EADDRNOTAVAIL
;
3626 if ((skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
)) == NULL
) {
3631 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).pid
,
3632 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
3634 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3635 WARN_ON(err
== -EMSGSIZE
);
3639 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).pid
);
3646 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
3648 struct sk_buff
*skb
;
3649 struct net
*net
= dev_net(ifa
->idev
->dev
);
3652 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
3656 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
3658 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3659 WARN_ON(err
== -EMSGSIZE
);
3663 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3667 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
3670 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
3671 __s32
*array
, int bytes
)
3673 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
3675 memset(array
, 0, bytes
);
3676 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
3677 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
3678 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
3679 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
3680 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
3681 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
3682 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
3683 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
3684 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] = cnf
->rtr_solicit_interval
;
3685 array
[DEVCONF_RTR_SOLICIT_DELAY
] = cnf
->rtr_solicit_delay
;
3686 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
3687 #ifdef CONFIG_IPV6_PRIVACY
3688 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
3689 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
3690 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
3691 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
3692 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
3694 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
3695 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
3696 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
3697 #ifdef CONFIG_IPV6_ROUTER_PREF
3698 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
3699 array
[DEVCONF_RTR_PROBE_INTERVAL
] = cnf
->rtr_probe_interval
;
3700 #ifdef CONFIG_IPV6_ROUTE_INFO
3701 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
3704 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
3705 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
3706 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3707 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
3709 #ifdef CONFIG_IPV6_MROUTE
3710 array
[DEVCONF_MC_FORWARDING
] = cnf
->mc_forwarding
;
3712 array
[DEVCONF_DISABLE_IPV6
] = cnf
->disable_ipv6
;
3713 array
[DEVCONF_ACCEPT_DAD
] = cnf
->accept_dad
;
3716 static inline size_t inet6_if_nlmsg_size(void)
3718 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
3719 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
3720 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
3721 + nla_total_size(4) /* IFLA_MTU */
3722 + nla_total_size(4) /* IFLA_LINK */
3723 + nla_total_size( /* IFLA_PROTINFO */
3724 nla_total_size(4) /* IFLA_INET6_FLAGS */
3725 + nla_total_size(sizeof(struct ifla_cacheinfo
))
3726 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
3727 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
3728 + nla_total_size(ICMP6_MIB_MAX
* 8) /* IFLA_INET6_ICMP6STATS */
3732 static inline void __snmp6_fill_stats(u64
*stats
, void **mib
, int items
,
3736 int pad
= bytes
- sizeof(u64
) * items
;
3739 /* Use put_unaligned() because stats may not be aligned for u64. */
3740 put_unaligned(items
, &stats
[0]);
3741 for (i
= 1; i
< items
; i
++)
3742 put_unaligned(snmp_fold_field(mib
, i
), &stats
[i
]);
3744 memset(&stats
[items
], 0, pad
);
3747 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
3751 case IFLA_INET6_STATS
:
3752 __snmp6_fill_stats(stats
, (void **)idev
->stats
.ipv6
, IPSTATS_MIB_MAX
, bytes
);
3754 case IFLA_INET6_ICMP6STATS
:
3755 __snmp6_fill_stats(stats
, (void **)idev
->stats
.icmpv6
, ICMP6_MIB_MAX
, bytes
);
3760 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3761 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3763 struct net_device
*dev
= idev
->dev
;
3765 struct ifinfomsg
*hdr
;
3766 struct nlmsghdr
*nlh
;
3768 struct ifla_cacheinfo ci
;
3770 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*hdr
), flags
);
3774 hdr
= nlmsg_data(nlh
);
3775 hdr
->ifi_family
= AF_INET6
;
3777 hdr
->ifi_type
= dev
->type
;
3778 hdr
->ifi_index
= dev
->ifindex
;
3779 hdr
->ifi_flags
= dev_get_flags(dev
);
3780 hdr
->ifi_change
= 0;
3782 NLA_PUT_STRING(skb
, IFLA_IFNAME
, dev
->name
);
3785 NLA_PUT(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
);
3787 NLA_PUT_U32(skb
, IFLA_MTU
, dev
->mtu
);
3788 if (dev
->ifindex
!= dev
->iflink
)
3789 NLA_PUT_U32(skb
, IFLA_LINK
, dev
->iflink
);
3791 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
3792 if (protoinfo
== NULL
)
3793 goto nla_put_failure
;
3795 NLA_PUT_U32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
);
3797 ci
.max_reasm_len
= IPV6_MAXPLEN
;
3798 ci
.tstamp
= (__u32
)(TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3799 + TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3800 ci
.reachable_time
= idev
->nd_parms
->reachable_time
;
3801 ci
.retrans_time
= idev
->nd_parms
->retrans_time
;
3802 NLA_PUT(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
);
3804 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
3806 goto nla_put_failure
;
3807 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
3809 /* XXX - MC not implemented */
3811 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
3813 goto nla_put_failure
;
3814 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
3816 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
3818 goto nla_put_failure
;
3819 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
3821 nla_nest_end(skb
, protoinfo
);
3822 return nlmsg_end(skb
, nlh
);
3825 nlmsg_cancel(skb
, nlh
);
3829 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3831 struct net
*net
= sock_net(skb
->sk
);
3833 int s_idx
= cb
->args
[0];
3834 struct net_device
*dev
;
3835 struct inet6_dev
*idev
;
3837 read_lock(&dev_base_lock
);
3839 for_each_netdev(net
, dev
) {
3842 if ((idev
= in6_dev_get(dev
)) == NULL
)
3844 err
= inet6_fill_ifinfo(skb
, idev
, NETLINK_CB(cb
->skb
).pid
,
3845 cb
->nlh
->nlmsg_seq
, RTM_NEWLINK
, NLM_F_MULTI
);
3852 read_unlock(&dev_base_lock
);
3858 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
3860 struct sk_buff
*skb
;
3861 struct net
*net
= dev_net(idev
->dev
);
3864 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
3868 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
3870 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3871 WARN_ON(err
== -EMSGSIZE
);
3875 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3879 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
3882 static inline size_t inet6_prefix_nlmsg_size(void)
3884 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
3885 + nla_total_size(sizeof(struct in6_addr
))
3886 + nla_total_size(sizeof(struct prefix_cacheinfo
));
3889 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3890 struct prefix_info
*pinfo
, u32 pid
, u32 seq
,
3891 int event
, unsigned int flags
)
3893 struct prefixmsg
*pmsg
;
3894 struct nlmsghdr
*nlh
;
3895 struct prefix_cacheinfo ci
;
3897 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*pmsg
), flags
);
3901 pmsg
= nlmsg_data(nlh
);
3902 pmsg
->prefix_family
= AF_INET6
;
3903 pmsg
->prefix_pad1
= 0;
3904 pmsg
->prefix_pad2
= 0;
3905 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
3906 pmsg
->prefix_len
= pinfo
->prefix_len
;
3907 pmsg
->prefix_type
= pinfo
->type
;
3908 pmsg
->prefix_pad3
= 0;
3909 pmsg
->prefix_flags
= 0;
3911 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
3912 if (pinfo
->autoconf
)
3913 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
3915 NLA_PUT(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
);
3917 ci
.preferred_time
= ntohl(pinfo
->prefered
);
3918 ci
.valid_time
= ntohl(pinfo
->valid
);
3919 NLA_PUT(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
);
3921 return nlmsg_end(skb
, nlh
);
3924 nlmsg_cancel(skb
, nlh
);
3928 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
3929 struct prefix_info
*pinfo
)
3931 struct sk_buff
*skb
;
3932 struct net
*net
= dev_net(idev
->dev
);
3935 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
3939 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
3941 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
3942 WARN_ON(err
== -EMSGSIZE
);
3946 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
3950 rtnl_set_sk_err(net
, RTNLGRP_IPV6_PREFIX
, err
);
3953 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3955 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
3960 * If the address was optimistic
3961 * we inserted the route at the start of
3962 * our DAD process, so we don't need
3965 if (!(ifp
->rt
->rt6i_node
))
3966 ip6_ins_rt(ifp
->rt
);
3967 if (ifp
->idev
->cnf
.forwarding
)
3968 addrconf_join_anycast(ifp
);
3971 if (ifp
->idev
->cnf
.forwarding
)
3972 addrconf_leave_anycast(ifp
);
3973 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
3974 dst_hold(&ifp
->rt
->u
.dst
);
3975 if (ip6_del_rt(ifp
->rt
))
3976 dst_free(&ifp
->rt
->u
.dst
);
3981 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
3984 if (likely(ifp
->idev
->dead
== 0))
3985 __ipv6_ifa_notify(event
, ifp
);
3986 rcu_read_unlock_bh();
3989 #ifdef CONFIG_SYSCTL
3992 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
,
3993 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
3995 int *valp
= ctl
->data
;
4000 ret
= proc_dointvec(ctl
, write
, buffer
, lenp
, ppos
);
4003 ret
= addrconf_fixup_forwarding(ctl
, valp
, val
);
4009 static int addrconf_sysctl_forward_strategy(ctl_table
*table
,
4010 void __user
*oldval
,
4011 size_t __user
*oldlenp
,
4012 void __user
*newval
, size_t newlen
)
4014 int *valp
= table
->data
;
4018 if (!newval
|| !newlen
)
4020 if (newlen
!= sizeof(int))
4022 if (get_user(new, (int __user
*)newval
))
4026 if (oldval
&& oldlenp
) {
4028 if (get_user(len
, oldlenp
))
4031 if (len
> table
->maxlen
)
4032 len
= table
->maxlen
;
4033 if (copy_to_user(oldval
, valp
, len
))
4035 if (put_user(len
, oldlenp
))
4041 return addrconf_fixup_forwarding(table
, valp
, val
);
4044 static void dev_disable_change(struct inet6_dev
*idev
)
4046 if (!idev
|| !idev
->dev
)
4049 if (idev
->cnf
.disable_ipv6
)
4050 addrconf_notify(NULL
, NETDEV_DOWN
, idev
->dev
);
4052 addrconf_notify(NULL
, NETDEV_UP
, idev
->dev
);
4055 static void addrconf_disable_change(struct net
*net
, __s32 newf
)
4057 struct net_device
*dev
;
4058 struct inet6_dev
*idev
;
4060 read_lock(&dev_base_lock
);
4061 for_each_netdev(net
, dev
) {
4063 idev
= __in6_dev_get(dev
);
4065 int changed
= (!idev
->cnf
.disable_ipv6
) ^ (!newf
);
4066 idev
->cnf
.disable_ipv6
= newf
;
4068 dev_disable_change(idev
);
4072 read_unlock(&dev_base_lock
);
4075 static int addrconf_disable_ipv6(struct ctl_table
*table
, int *p
, int old
)
4079 net
= (struct net
*)table
->extra2
;
4081 if (p
== &net
->ipv6
.devconf_dflt
->disable_ipv6
)
4084 if (!rtnl_trylock()) {
4085 /* Restore the original values before restarting */
4087 return restart_syscall();
4090 if (p
== &net
->ipv6
.devconf_all
->disable_ipv6
) {
4091 __s32 newf
= net
->ipv6
.devconf_all
->disable_ipv6
;
4092 net
->ipv6
.devconf_dflt
->disable_ipv6
= newf
;
4093 addrconf_disable_change(net
, newf
);
4094 } else if ((!*p
) ^ (!old
))
4095 dev_disable_change((struct inet6_dev
*)table
->extra1
);
4102 int addrconf_sysctl_disable(ctl_table
*ctl
, int write
,
4103 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4105 int *valp
= ctl
->data
;
4110 ret
= proc_dointvec(ctl
, write
, buffer
, lenp
, ppos
);
4113 ret
= addrconf_disable_ipv6(ctl
, valp
, val
);
4119 static struct addrconf_sysctl_table
4121 struct ctl_table_header
*sysctl_header
;
4122 ctl_table addrconf_vars
[DEVCONF_MAX
+1];
4124 } addrconf_sysctl __read_mostly
= {
4125 .sysctl_header
= NULL
,
4128 .ctl_name
= NET_IPV6_FORWARDING
,
4129 .procname
= "forwarding",
4130 .data
= &ipv6_devconf
.forwarding
,
4131 .maxlen
= sizeof(int),
4133 .proc_handler
= addrconf_sysctl_forward
,
4134 .strategy
= addrconf_sysctl_forward_strategy
,
4137 .ctl_name
= NET_IPV6_HOP_LIMIT
,
4138 .procname
= "hop_limit",
4139 .data
= &ipv6_devconf
.hop_limit
,
4140 .maxlen
= sizeof(int),
4142 .proc_handler
= proc_dointvec
,
4145 .ctl_name
= NET_IPV6_MTU
,
4147 .data
= &ipv6_devconf
.mtu6
,
4148 .maxlen
= sizeof(int),
4150 .proc_handler
= proc_dointvec
,
4153 .ctl_name
= NET_IPV6_ACCEPT_RA
,
4154 .procname
= "accept_ra",
4155 .data
= &ipv6_devconf
.accept_ra
,
4156 .maxlen
= sizeof(int),
4158 .proc_handler
= proc_dointvec
,
4161 .ctl_name
= NET_IPV6_ACCEPT_REDIRECTS
,
4162 .procname
= "accept_redirects",
4163 .data
= &ipv6_devconf
.accept_redirects
,
4164 .maxlen
= sizeof(int),
4166 .proc_handler
= proc_dointvec
,
4169 .ctl_name
= NET_IPV6_AUTOCONF
,
4170 .procname
= "autoconf",
4171 .data
= &ipv6_devconf
.autoconf
,
4172 .maxlen
= sizeof(int),
4174 .proc_handler
= proc_dointvec
,
4177 .ctl_name
= NET_IPV6_DAD_TRANSMITS
,
4178 .procname
= "dad_transmits",
4179 .data
= &ipv6_devconf
.dad_transmits
,
4180 .maxlen
= sizeof(int),
4182 .proc_handler
= proc_dointvec
,
4185 .ctl_name
= NET_IPV6_RTR_SOLICITS
,
4186 .procname
= "router_solicitations",
4187 .data
= &ipv6_devconf
.rtr_solicits
,
4188 .maxlen
= sizeof(int),
4190 .proc_handler
= proc_dointvec
,
4193 .ctl_name
= NET_IPV6_RTR_SOLICIT_INTERVAL
,
4194 .procname
= "router_solicitation_interval",
4195 .data
= &ipv6_devconf
.rtr_solicit_interval
,
4196 .maxlen
= sizeof(int),
4198 .proc_handler
= proc_dointvec_jiffies
,
4199 .strategy
= sysctl_jiffies
,
4202 .ctl_name
= NET_IPV6_RTR_SOLICIT_DELAY
,
4203 .procname
= "router_solicitation_delay",
4204 .data
= &ipv6_devconf
.rtr_solicit_delay
,
4205 .maxlen
= sizeof(int),
4207 .proc_handler
= proc_dointvec_jiffies
,
4208 .strategy
= sysctl_jiffies
,
4211 .ctl_name
= NET_IPV6_FORCE_MLD_VERSION
,
4212 .procname
= "force_mld_version",
4213 .data
= &ipv6_devconf
.force_mld_version
,
4214 .maxlen
= sizeof(int),
4216 .proc_handler
= proc_dointvec
,
4218 #ifdef CONFIG_IPV6_PRIVACY
4220 .ctl_name
= NET_IPV6_USE_TEMPADDR
,
4221 .procname
= "use_tempaddr",
4222 .data
= &ipv6_devconf
.use_tempaddr
,
4223 .maxlen
= sizeof(int),
4225 .proc_handler
= proc_dointvec
,
4228 .ctl_name
= NET_IPV6_TEMP_VALID_LFT
,
4229 .procname
= "temp_valid_lft",
4230 .data
= &ipv6_devconf
.temp_valid_lft
,
4231 .maxlen
= sizeof(int),
4233 .proc_handler
= proc_dointvec
,
4236 .ctl_name
= NET_IPV6_TEMP_PREFERED_LFT
,
4237 .procname
= "temp_prefered_lft",
4238 .data
= &ipv6_devconf
.temp_prefered_lft
,
4239 .maxlen
= sizeof(int),
4241 .proc_handler
= proc_dointvec
,
4244 .ctl_name
= NET_IPV6_REGEN_MAX_RETRY
,
4245 .procname
= "regen_max_retry",
4246 .data
= &ipv6_devconf
.regen_max_retry
,
4247 .maxlen
= sizeof(int),
4249 .proc_handler
= proc_dointvec
,
4252 .ctl_name
= NET_IPV6_MAX_DESYNC_FACTOR
,
4253 .procname
= "max_desync_factor",
4254 .data
= &ipv6_devconf
.max_desync_factor
,
4255 .maxlen
= sizeof(int),
4257 .proc_handler
= proc_dointvec
,
4261 .ctl_name
= NET_IPV6_MAX_ADDRESSES
,
4262 .procname
= "max_addresses",
4263 .data
= &ipv6_devconf
.max_addresses
,
4264 .maxlen
= sizeof(int),
4266 .proc_handler
= proc_dointvec
,
4269 .ctl_name
= NET_IPV6_ACCEPT_RA_DEFRTR
,
4270 .procname
= "accept_ra_defrtr",
4271 .data
= &ipv6_devconf
.accept_ra_defrtr
,
4272 .maxlen
= sizeof(int),
4274 .proc_handler
= proc_dointvec
,
4277 .ctl_name
= NET_IPV6_ACCEPT_RA_PINFO
,
4278 .procname
= "accept_ra_pinfo",
4279 .data
= &ipv6_devconf
.accept_ra_pinfo
,
4280 .maxlen
= sizeof(int),
4282 .proc_handler
= proc_dointvec
,
4284 #ifdef CONFIG_IPV6_ROUTER_PREF
4286 .ctl_name
= NET_IPV6_ACCEPT_RA_RTR_PREF
,
4287 .procname
= "accept_ra_rtr_pref",
4288 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
4289 .maxlen
= sizeof(int),
4291 .proc_handler
= proc_dointvec
,
4294 .ctl_name
= NET_IPV6_RTR_PROBE_INTERVAL
,
4295 .procname
= "router_probe_interval",
4296 .data
= &ipv6_devconf
.rtr_probe_interval
,
4297 .maxlen
= sizeof(int),
4299 .proc_handler
= proc_dointvec_jiffies
,
4300 .strategy
= sysctl_jiffies
,
4302 #ifdef CONFIG_IPV6_ROUTE_INFO
4304 .ctl_name
= NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN
,
4305 .procname
= "accept_ra_rt_info_max_plen",
4306 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
4307 .maxlen
= sizeof(int),
4309 .proc_handler
= proc_dointvec
,
4314 .ctl_name
= NET_IPV6_PROXY_NDP
,
4315 .procname
= "proxy_ndp",
4316 .data
= &ipv6_devconf
.proxy_ndp
,
4317 .maxlen
= sizeof(int),
4319 .proc_handler
= proc_dointvec
,
4322 .ctl_name
= NET_IPV6_ACCEPT_SOURCE_ROUTE
,
4323 .procname
= "accept_source_route",
4324 .data
= &ipv6_devconf
.accept_source_route
,
4325 .maxlen
= sizeof(int),
4327 .proc_handler
= proc_dointvec
,
4329 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4331 .ctl_name
= CTL_UNNUMBERED
,
4332 .procname
= "optimistic_dad",
4333 .data
= &ipv6_devconf
.optimistic_dad
,
4334 .maxlen
= sizeof(int),
4336 .proc_handler
= proc_dointvec
,
4340 #ifdef CONFIG_IPV6_MROUTE
4342 .ctl_name
= CTL_UNNUMBERED
,
4343 .procname
= "mc_forwarding",
4344 .data
= &ipv6_devconf
.mc_forwarding
,
4345 .maxlen
= sizeof(int),
4347 .proc_handler
= proc_dointvec
,
4351 .ctl_name
= CTL_UNNUMBERED
,
4352 .procname
= "disable_ipv6",
4353 .data
= &ipv6_devconf
.disable_ipv6
,
4354 .maxlen
= sizeof(int),
4356 .proc_handler
= addrconf_sysctl_disable
,
4357 .strategy
= sysctl_intvec
,
4360 .ctl_name
= CTL_UNNUMBERED
,
4361 .procname
= "accept_dad",
4362 .data
= &ipv6_devconf
.accept_dad
,
4363 .maxlen
= sizeof(int),
4365 .proc_handler
= proc_dointvec
,
4368 .ctl_name
= 0, /* sentinel */
4373 static int __addrconf_sysctl_register(struct net
*net
, char *dev_name
,
4374 int ctl_name
, struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
4377 struct addrconf_sysctl_table
*t
;
4379 #define ADDRCONF_CTL_PATH_DEV 3
4381 struct ctl_path addrconf_ctl_path
[] = {
4382 { .procname
= "net", .ctl_name
= CTL_NET
, },
4383 { .procname
= "ipv6", .ctl_name
= NET_IPV6
, },
4384 { .procname
= "conf", .ctl_name
= NET_IPV6_CONF
, },
4385 { /* to be set */ },
4390 t
= kmemdup(&addrconf_sysctl
, sizeof(*t
), GFP_KERNEL
);
4394 for (i
=0; t
->addrconf_vars
[i
].data
; i
++) {
4395 t
->addrconf_vars
[i
].data
+= (char*)p
- (char*)&ipv6_devconf
;
4396 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
4397 t
->addrconf_vars
[i
].extra2
= net
;
4401 * Make a copy of dev_name, because '.procname' is regarded as const
4402 * by sysctl and we wouldn't want anyone to change it under our feet
4403 * (see SIOCSIFNAME).
4405 t
->dev_name
= kstrdup(dev_name
, GFP_KERNEL
);
4409 addrconf_ctl_path
[ADDRCONF_CTL_PATH_DEV
].procname
= t
->dev_name
;
4410 addrconf_ctl_path
[ADDRCONF_CTL_PATH_DEV
].ctl_name
= ctl_name
;
4412 t
->sysctl_header
= register_net_sysctl_table(net
, addrconf_ctl_path
,
4414 if (t
->sysctl_header
== NULL
)
4428 static void __addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
4430 struct addrconf_sysctl_table
*t
;
4432 if (p
->sysctl
== NULL
)
4437 unregister_sysctl_table(t
->sysctl_header
);
4442 static void addrconf_sysctl_register(struct inet6_dev
*idev
)
4444 neigh_sysctl_register(idev
->dev
, idev
->nd_parms
, NET_IPV6
,
4445 NET_IPV6_NEIGH
, "ipv6",
4446 &ndisc_ifinfo_sysctl_change
,
4447 ndisc_ifinfo_sysctl_strategy
);
4448 __addrconf_sysctl_register(dev_net(idev
->dev
), idev
->dev
->name
,
4449 idev
->dev
->ifindex
, idev
, &idev
->cnf
);
4452 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
4454 __addrconf_sysctl_unregister(&idev
->cnf
);
4455 neigh_sysctl_unregister(idev
->nd_parms
);
4461 static int addrconf_init_net(struct net
*net
)
4464 struct ipv6_devconf
*all
, *dflt
;
4467 all
= &ipv6_devconf
;
4468 dflt
= &ipv6_devconf_dflt
;
4470 if (net
!= &init_net
) {
4471 all
= kmemdup(all
, sizeof(ipv6_devconf
), GFP_KERNEL
);
4475 dflt
= kmemdup(dflt
, sizeof(ipv6_devconf_dflt
), GFP_KERNEL
);
4477 goto err_alloc_dflt
;
4479 /* these will be inherited by all namespaces */
4480 dflt
->autoconf
= ipv6_defaults
.autoconf
;
4481 dflt
->disable_ipv6
= ipv6_defaults
.disable_ipv6
;
4484 net
->ipv6
.devconf_all
= all
;
4485 net
->ipv6
.devconf_dflt
= dflt
;
4487 #ifdef CONFIG_SYSCTL
4488 err
= __addrconf_sysctl_register(net
, "all", NET_PROTO_CONF_ALL
,
4493 err
= __addrconf_sysctl_register(net
, "default", NET_PROTO_CONF_DEFAULT
,
4500 #ifdef CONFIG_SYSCTL
4502 __addrconf_sysctl_unregister(all
);
4512 static void addrconf_exit_net(struct net
*net
)
4514 #ifdef CONFIG_SYSCTL
4515 __addrconf_sysctl_unregister(net
->ipv6
.devconf_dflt
);
4516 __addrconf_sysctl_unregister(net
->ipv6
.devconf_all
);
4518 if (net
!= &init_net
) {
4519 kfree(net
->ipv6
.devconf_dflt
);
4520 kfree(net
->ipv6
.devconf_all
);
4524 static struct pernet_operations addrconf_ops
= {
4525 .init
= addrconf_init_net
,
4526 .exit
= addrconf_exit_net
,
4533 int register_inet6addr_notifier(struct notifier_block
*nb
)
4535 return atomic_notifier_chain_register(&inet6addr_chain
, nb
);
4538 EXPORT_SYMBOL(register_inet6addr_notifier
);
4540 int unregister_inet6addr_notifier(struct notifier_block
*nb
)
4542 return atomic_notifier_chain_unregister(&inet6addr_chain
,nb
);
4545 EXPORT_SYMBOL(unregister_inet6addr_notifier
);
4548 * Init / cleanup code
4551 int __init
addrconf_init(void)
4555 if ((err
= ipv6_addr_label_init()) < 0) {
4556 printk(KERN_CRIT
"IPv6 Addrconf: cannot initialize default policy table: %d.\n",
4561 register_pernet_subsys(&addrconf_ops
);
4563 /* The addrconf netdev notifier requires that loopback_dev
4564 * has it's ipv6 private information allocated and setup
4565 * before it can bring up and give link-local addresses
4566 * to other devices which are up.
4568 * Unfortunately, loopback_dev is not necessarily the first
4569 * entry in the global dev_base list of net devices. In fact,
4570 * it is likely to be the very last entry on that list.
4571 * So this causes the notifier registry below to try and
4572 * give link-local addresses to all devices besides loopback_dev
4573 * first, then loopback_dev, which cases all the non-loopback_dev
4574 * devices to fail to get a link-local address.
4576 * So, as a temporary fix, allocate the ipv6 structure for
4577 * loopback_dev first by hand.
4578 * Longer term, all of the dependencies ipv6 has upon the loopback
4579 * device and it being up should be removed.
4582 if (!ipv6_add_dev(init_net
.loopback_dev
))
4588 register_netdevice_notifier(&ipv6_dev_notf
);
4592 err
= __rtnl_register(PF_INET6
, RTM_GETLINK
, NULL
, inet6_dump_ifinfo
);
4596 /* Only the first call to __rtnl_register can fail */
4597 __rtnl_register(PF_INET6
, RTM_NEWADDR
, inet6_rtm_newaddr
, NULL
);
4598 __rtnl_register(PF_INET6
, RTM_DELADDR
, inet6_rtm_deladdr
, NULL
);
4599 __rtnl_register(PF_INET6
, RTM_GETADDR
, inet6_rtm_getaddr
, inet6_dump_ifaddr
);
4600 __rtnl_register(PF_INET6
, RTM_GETMULTICAST
, NULL
, inet6_dump_ifmcaddr
);
4601 __rtnl_register(PF_INET6
, RTM_GETANYCAST
, NULL
, inet6_dump_ifacaddr
);
4603 ipv6_addr_label_rtnl_register();
4607 unregister_netdevice_notifier(&ipv6_dev_notf
);
4609 unregister_pernet_subsys(&addrconf_ops
);
4614 void addrconf_cleanup(void)
4616 struct inet6_ifaddr
*ifa
;
4617 struct net_device
*dev
;
4620 unregister_netdevice_notifier(&ipv6_dev_notf
);
4621 unregister_pernet_subsys(&addrconf_ops
);
4625 /* clean dev list */
4626 for_each_netdev(&init_net
, dev
) {
4627 if (__in6_dev_get(dev
) == NULL
)
4629 addrconf_ifdown(dev
, 1);
4631 addrconf_ifdown(init_net
.loopback_dev
, 2);
4636 write_lock_bh(&addrconf_hash_lock
);
4637 for (i
=0; i
< IN6_ADDR_HSIZE
; i
++) {
4638 for (ifa
=inet6_addr_lst
[i
]; ifa
; ) {
4639 struct inet6_ifaddr
*bifa
;
4642 ifa
= ifa
->lst_next
;
4643 printk(KERN_DEBUG
"bug: IPv6 address leakage detected: ifa=%p\n", bifa
);
4644 /* Do not free it; something is wrong.
4645 Now we can investigate it with debugger.
4649 write_unlock_bh(&addrconf_hash_lock
);
4651 del_timer(&addr_chk_timer
);