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>
56 #include <linux/slab.h>
58 #include <linux/sysctl.h>
60 #include <linux/capability.h>
61 #include <linux/delay.h>
62 #include <linux/notifier.h>
63 #include <linux/string.h>
65 #include <net/net_namespace.h>
70 #include <net/protocol.h>
71 #include <net/ndisc.h>
72 #include <net/ip6_route.h>
73 #include <net/addrconf.h>
76 #include <net/netlink.h>
77 #include <net/pkt_sched.h>
78 #include <linux/if_tunnel.h>
79 #include <linux/rtnetlink.h>
81 #ifdef CONFIG_IPV6_PRIVACY
82 #include <linux/random.h>
85 #include <linux/uaccess.h>
86 #include <asm/unaligned.h>
88 #include <linux/proc_fs.h>
89 #include <linux/seq_file.h>
91 /* Set to 3 to get tracing... */
95 #define ADBG(x) printk x
100 #define INFINITY_LIFE_TIME 0xFFFFFFFF
101 #define TIME_DELTA(a, b) ((unsigned long)((long)(a) - (long)(b)))
103 #define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ/50 : 1)
104 #define ADDRCONF_TIMER_FUZZ (HZ / 4)
105 #define ADDRCONF_TIMER_FUZZ_MAX (HZ)
108 static void addrconf_sysctl_register(struct inet6_dev
*idev
);
109 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
);
111 static inline void addrconf_sysctl_register(struct inet6_dev
*idev
)
115 static inline void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
120 #ifdef CONFIG_IPV6_PRIVACY
121 static int __ipv6_regen_rndid(struct inet6_dev
*idev
);
122 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
123 static void ipv6_regen_rndid(unsigned long data
);
125 static int desync_factor
= MAX_DESYNC_FACTOR
* HZ
;
128 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
);
129 static int ipv6_count_addresses(struct inet6_dev
*idev
);
132 * Configured unicast address hash table
134 static struct hlist_head inet6_addr_lst
[IN6_ADDR_HSIZE
];
135 static DEFINE_SPINLOCK(addrconf_hash_lock
);
137 static void addrconf_verify(unsigned long);
139 static DEFINE_TIMER(addr_chk_timer
, addrconf_verify
, 0, 0);
140 static DEFINE_SPINLOCK(addrconf_verify_lock
);
142 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
143 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
145 static void addrconf_type_change(struct net_device
*dev
,
146 unsigned long event
);
147 static int addrconf_ifdown(struct net_device
*dev
, int how
);
149 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
);
150 static void addrconf_dad_timer(unsigned long data
);
151 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
);
152 static void addrconf_dad_run(struct inet6_dev
*idev
);
153 static void addrconf_rs_timer(unsigned long data
);
154 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
155 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
157 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
158 struct prefix_info
*pinfo
);
159 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
160 struct net_device
*dev
);
162 static ATOMIC_NOTIFIER_HEAD(inet6addr_chain
);
164 static struct ipv6_devconf ipv6_devconf __read_mostly
= {
166 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
167 .mtu6
= IPV6_MIN_MTU
,
169 .accept_redirects
= 1,
171 .force_mld_version
= 0,
173 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
174 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
175 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
176 #ifdef CONFIG_IPV6_PRIVACY
178 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
179 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
180 .regen_max_retry
= REGEN_MAX_RETRY
,
181 .max_desync_factor
= MAX_DESYNC_FACTOR
,
183 .max_addresses
= IPV6_MAX_ADDRESSES
,
184 .accept_ra_defrtr
= 1,
185 .accept_ra_pinfo
= 1,
186 #ifdef CONFIG_IPV6_ROUTER_PREF
187 .accept_ra_rtr_pref
= 1,
188 .rtr_probe_interval
= 60 * HZ
,
189 #ifdef CONFIG_IPV6_ROUTE_INFO
190 .accept_ra_rt_info_max_plen
= 0,
194 .accept_source_route
= 0, /* we do not accept RH0 by default. */
199 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly
= {
201 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
202 .mtu6
= IPV6_MIN_MTU
,
204 .accept_redirects
= 1,
207 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
208 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
209 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
210 #ifdef CONFIG_IPV6_PRIVACY
212 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
213 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
214 .regen_max_retry
= REGEN_MAX_RETRY
,
215 .max_desync_factor
= MAX_DESYNC_FACTOR
,
217 .max_addresses
= IPV6_MAX_ADDRESSES
,
218 .accept_ra_defrtr
= 1,
219 .accept_ra_pinfo
= 1,
220 #ifdef CONFIG_IPV6_ROUTER_PREF
221 .accept_ra_rtr_pref
= 1,
222 .rtr_probe_interval
= 60 * HZ
,
223 #ifdef CONFIG_IPV6_ROUTE_INFO
224 .accept_ra_rt_info_max_plen
= 0,
228 .accept_source_route
= 0, /* we do not accept RH0 by default. */
233 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
234 const struct in6_addr in6addr_any
= IN6ADDR_ANY_INIT
;
235 const struct in6_addr in6addr_loopback
= IN6ADDR_LOOPBACK_INIT
;
236 const struct in6_addr in6addr_linklocal_allnodes
= IN6ADDR_LINKLOCAL_ALLNODES_INIT
;
237 const struct in6_addr in6addr_linklocal_allrouters
= IN6ADDR_LINKLOCAL_ALLROUTERS_INIT
;
239 /* Check if a valid qdisc is available */
240 static inline bool addrconf_qdisc_ok(const struct net_device
*dev
)
242 return !qdisc_tx_is_noop(dev
);
245 /* Check if a route is valid prefix route */
246 static inline int addrconf_is_prefix_route(const struct rt6_info
*rt
)
248 return ((rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0);
251 static void addrconf_del_timer(struct inet6_ifaddr
*ifp
)
253 if (del_timer(&ifp
->timer
))
257 enum addrconf_timer_t
{
263 static void addrconf_mod_timer(struct inet6_ifaddr
*ifp
,
264 enum addrconf_timer_t what
,
267 if (!del_timer(&ifp
->timer
))
272 ifp
->timer
.function
= addrconf_dad_timer
;
275 ifp
->timer
.function
= addrconf_rs_timer
;
280 ifp
->timer
.expires
= jiffies
+ when
;
281 add_timer(&ifp
->timer
);
284 static int snmp6_alloc_dev(struct inet6_dev
*idev
)
286 if (snmp_mib_init((void __percpu
**)idev
->stats
.ipv6
,
287 sizeof(struct ipstats_mib
)) < 0)
289 if (snmp_mib_init((void __percpu
**)idev
->stats
.icmpv6
,
290 sizeof(struct icmpv6_mib
)) < 0)
292 if (snmp_mib_init((void __percpu
**)idev
->stats
.icmpv6msg
,
293 sizeof(struct icmpv6msg_mib
)) < 0)
299 snmp_mib_free((void __percpu
**)idev
->stats
.icmpv6
);
301 snmp_mib_free((void __percpu
**)idev
->stats
.ipv6
);
306 static void snmp6_free_dev(struct inet6_dev
*idev
)
308 snmp_mib_free((void __percpu
**)idev
->stats
.icmpv6msg
);
309 snmp_mib_free((void __percpu
**)idev
->stats
.icmpv6
);
310 snmp_mib_free((void __percpu
**)idev
->stats
.ipv6
);
313 /* Nobody refers to this device, we may destroy it. */
315 static void in6_dev_finish_destroy_rcu(struct rcu_head
*head
)
317 struct inet6_dev
*idev
= container_of(head
, struct inet6_dev
, rcu
);
321 void in6_dev_finish_destroy(struct inet6_dev
*idev
)
323 struct net_device
*dev
= idev
->dev
;
325 WARN_ON(!list_empty(&idev
->addr_list
));
326 WARN_ON(idev
->mc_list
!= NULL
);
328 #ifdef NET_REFCNT_DEBUG
329 printk(KERN_DEBUG
"in6_dev_finish_destroy: %s\n", dev
? dev
->name
: "NIL");
333 pr_warning("Freeing alive inet6 device %p\n", idev
);
336 snmp6_free_dev(idev
);
337 call_rcu(&idev
->rcu
, in6_dev_finish_destroy_rcu
);
340 EXPORT_SYMBOL(in6_dev_finish_destroy
);
342 static struct inet6_dev
* ipv6_add_dev(struct net_device
*dev
)
344 struct inet6_dev
*ndev
;
348 if (dev
->mtu
< IPV6_MIN_MTU
)
351 ndev
= kzalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
356 rwlock_init(&ndev
->lock
);
358 INIT_LIST_HEAD(&ndev
->addr_list
);
360 memcpy(&ndev
->cnf
, dev_net(dev
)->ipv6
.devconf_dflt
, sizeof(ndev
->cnf
));
361 ndev
->cnf
.mtu6
= dev
->mtu
;
362 ndev
->cnf
.sysctl
= NULL
;
363 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
364 if (ndev
->nd_parms
== NULL
) {
368 if (ndev
->cnf
.forwarding
)
369 dev_disable_lro(dev
);
370 /* We refer to the device */
373 if (snmp6_alloc_dev(ndev
) < 0) {
375 "%s(): cannot allocate memory for statistics; dev=%s.\n",
376 __func__
, dev
->name
));
377 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
379 in6_dev_finish_destroy(ndev
);
383 if (snmp6_register_dev(ndev
) < 0) {
385 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
386 __func__
, dev
->name
));
387 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
389 in6_dev_finish_destroy(ndev
);
393 /* One reference from device. We must do this before
394 * we invoke __ipv6_regen_rndid().
398 if (dev
->flags
& (IFF_NOARP
| IFF_LOOPBACK
))
399 ndev
->cnf
.accept_dad
= -1;
401 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
402 if (dev
->type
== ARPHRD_SIT
&& (dev
->priv_flags
& IFF_ISATAP
)) {
404 "%s: Disabled Multicast RS\n",
406 ndev
->cnf
.rtr_solicits
= 0;
410 #ifdef CONFIG_IPV6_PRIVACY
411 INIT_LIST_HEAD(&ndev
->tempaddr_list
);
412 setup_timer(&ndev
->regen_timer
, ipv6_regen_rndid
, (unsigned long)ndev
);
413 if ((dev
->flags
&IFF_LOOPBACK
) ||
414 dev
->type
== ARPHRD_TUNNEL
||
415 dev
->type
== ARPHRD_TUNNEL6
||
416 dev
->type
== ARPHRD_SIT
||
417 dev
->type
== ARPHRD_NONE
) {
419 "%s: Disabled Privacy Extensions\n",
421 ndev
->cnf
.use_tempaddr
= -1;
424 ipv6_regen_rndid((unsigned long) ndev
);
428 if (netif_running(dev
) && addrconf_qdisc_ok(dev
))
429 ndev
->if_flags
|= IF_READY
;
431 ipv6_mc_init_dev(ndev
);
432 ndev
->tstamp
= jiffies
;
433 addrconf_sysctl_register(ndev
);
434 /* protected by rtnl_lock */
435 rcu_assign_pointer(dev
->ip6_ptr
, ndev
);
437 /* Join all-node multicast group */
438 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allnodes
);
443 static struct inet6_dev
* ipv6_find_idev(struct net_device
*dev
)
445 struct inet6_dev
*idev
;
449 idev
= __in6_dev_get(dev
);
451 idev
= ipv6_add_dev(dev
);
456 if (dev
->flags
&IFF_UP
)
462 static void dev_forward_change(struct inet6_dev
*idev
)
464 struct net_device
*dev
;
465 struct inet6_ifaddr
*ifa
;
470 if (idev
->cnf
.forwarding
)
471 dev_disable_lro(dev
);
472 if (dev
&& (dev
->flags
& IFF_MULTICAST
)) {
473 if (idev
->cnf
.forwarding
)
474 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
476 ipv6_dev_mc_dec(dev
, &in6addr_linklocal_allrouters
);
479 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
480 if (ifa
->flags
&IFA_F_TENTATIVE
)
482 if (idev
->cnf
.forwarding
)
483 addrconf_join_anycast(ifa
);
485 addrconf_leave_anycast(ifa
);
490 static void addrconf_forward_change(struct net
*net
, __s32 newf
)
492 struct net_device
*dev
;
493 struct inet6_dev
*idev
;
496 for_each_netdev_rcu(net
, dev
) {
497 idev
= __in6_dev_get(dev
);
499 int changed
= (!idev
->cnf
.forwarding
) ^ (!newf
);
500 idev
->cnf
.forwarding
= newf
;
502 dev_forward_change(idev
);
508 static int addrconf_fixup_forwarding(struct ctl_table
*table
, int *p
, int old
)
512 net
= (struct net
*)table
->extra2
;
513 if (p
== &net
->ipv6
.devconf_dflt
->forwarding
)
516 if (!rtnl_trylock()) {
517 /* Restore the original values before restarting */
519 return restart_syscall();
522 if (p
== &net
->ipv6
.devconf_all
->forwarding
) {
523 __s32 newf
= net
->ipv6
.devconf_all
->forwarding
;
524 net
->ipv6
.devconf_dflt
->forwarding
= newf
;
525 addrconf_forward_change(net
, newf
);
526 } else if ((!*p
) ^ (!old
))
527 dev_forward_change((struct inet6_dev
*)table
->extra1
);
531 rt6_purge_dflt_routers(net
);
536 static void inet6_ifa_finish_destroy_rcu(struct rcu_head
*head
)
538 struct inet6_ifaddr
*ifp
= container_of(head
, struct inet6_ifaddr
, rcu
);
542 /* Nobody refers to this ifaddr, destroy it */
543 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
545 WARN_ON(!hlist_unhashed(&ifp
->addr_lst
));
547 #ifdef NET_REFCNT_DEBUG
548 printk(KERN_DEBUG
"inet6_ifa_finish_destroy\n");
551 in6_dev_put(ifp
->idev
);
553 if (del_timer(&ifp
->timer
))
554 pr_notice("Timer is still running, when freeing ifa=%p\n", ifp
);
557 pr_warning("Freeing alive inet6 address %p\n", ifp
);
560 dst_release(&ifp
->rt
->u
.dst
);
562 call_rcu(&ifp
->rcu
, inet6_ifa_finish_destroy_rcu
);
566 ipv6_link_dev_addr(struct inet6_dev
*idev
, struct inet6_ifaddr
*ifp
)
569 int ifp_scope
= ipv6_addr_src_scope(&ifp
->addr
);
572 * Each device address list is sorted in order of scope -
573 * global before linklocal.
575 list_for_each(p
, &idev
->addr_list
) {
576 struct inet6_ifaddr
*ifa
577 = list_entry(p
, struct inet6_ifaddr
, if_list
);
578 if (ifp_scope
>= ipv6_addr_src_scope(&ifa
->addr
))
582 list_add_tail(&ifp
->if_list
, p
);
585 static u32
ipv6_addr_hash(const struct in6_addr
*addr
)
588 * We perform the hash function over the last 64 bits of the address
589 * This will include the IEEE address token on links that support it.
591 return jhash_2words(addr
->s6_addr32
[2], addr
->s6_addr32
[3], 0)
592 & (IN6_ADDR_HSIZE
- 1);
595 /* On success it returns ifp with increased reference count */
597 static struct inet6_ifaddr
*
598 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
, int pfxlen
,
599 int scope
, u32 flags
)
601 struct inet6_ifaddr
*ifa
= NULL
;
605 int addr_type
= ipv6_addr_type(addr
);
607 if (addr_type
== IPV6_ADDR_ANY
||
608 addr_type
& IPV6_ADDR_MULTICAST
||
609 (!(idev
->dev
->flags
& IFF_LOOPBACK
) &&
610 addr_type
& IPV6_ADDR_LOOPBACK
))
611 return ERR_PTR(-EADDRNOTAVAIL
);
615 err
= -ENODEV
; /*XXX*/
619 if (idev
->cnf
.disable_ipv6
) {
624 spin_lock(&addrconf_hash_lock
);
626 /* Ignore adding duplicate addresses on an interface */
627 if (ipv6_chk_same_addr(dev_net(idev
->dev
), addr
, idev
->dev
)) {
628 ADBG(("ipv6_add_addr: already assigned\n"));
633 ifa
= kzalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
636 ADBG(("ipv6_add_addr: malloc failed\n"));
641 rt
= addrconf_dst_alloc(idev
, addr
, 0);
647 ipv6_addr_copy(&ifa
->addr
, addr
);
649 spin_lock_init(&ifa
->lock
);
650 init_timer(&ifa
->timer
);
651 INIT_HLIST_NODE(&ifa
->addr_lst
);
652 ifa
->timer
.data
= (unsigned long) ifa
;
654 ifa
->prefix_len
= pfxlen
;
655 ifa
->flags
= flags
| IFA_F_TENTATIVE
;
656 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
661 * part one of RFC 4429, section 3.3
662 * We should not configure an address as
663 * optimistic if we do not yet know the link
664 * layer address of our nexhop router
667 if (rt
->rt6i_nexthop
== NULL
)
668 ifa
->flags
&= ~IFA_F_OPTIMISTIC
;
675 /* Add to big hash table */
676 hash
= ipv6_addr_hash(addr
);
678 hlist_add_head_rcu(&ifa
->addr_lst
, &inet6_addr_lst
[hash
]);
679 spin_unlock(&addrconf_hash_lock
);
681 write_lock(&idev
->lock
);
682 /* Add to inet6_dev unicast addr list. */
683 ipv6_link_dev_addr(idev
, ifa
);
685 #ifdef CONFIG_IPV6_PRIVACY
686 if (ifa
->flags
&IFA_F_TEMPORARY
) {
687 list_add(&ifa
->tmp_list
, &idev
->tempaddr_list
);
693 write_unlock(&idev
->lock
);
695 rcu_read_unlock_bh();
697 if (likely(err
== 0))
698 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_UP
, ifa
);
706 spin_unlock(&addrconf_hash_lock
);
710 /* This function wants to get referenced ifp and releases it before return */
712 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
714 struct inet6_ifaddr
*ifa
, *ifn
;
715 struct inet6_dev
*idev
= ifp
->idev
;
717 int deleted
= 0, onlink
= 0;
718 unsigned long expires
= jiffies
;
720 hash
= ipv6_addr_hash(&ifp
->addr
);
724 spin_lock_bh(&addrconf_hash_lock
);
725 hlist_del_init_rcu(&ifp
->addr_lst
);
726 spin_unlock_bh(&addrconf_hash_lock
);
728 write_lock_bh(&idev
->lock
);
729 #ifdef CONFIG_IPV6_PRIVACY
730 if (ifp
->flags
&IFA_F_TEMPORARY
) {
731 list_del(&ifp
->tmp_list
);
733 in6_ifa_put(ifp
->ifpub
);
740 list_for_each_entry_safe(ifa
, ifn
, &idev
->addr_list
, if_list
) {
742 list_del_init(&ifp
->if_list
);
745 if (!(ifp
->flags
& IFA_F_PERMANENT
) || onlink
> 0)
749 } else if (ifp
->flags
& IFA_F_PERMANENT
) {
750 if (ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
752 if (ifa
->flags
& IFA_F_PERMANENT
) {
757 unsigned long lifetime
;
762 spin_lock(&ifa
->lock
);
764 lifetime
= addrconf_timeout_fixup(ifa
->valid_lft
, HZ
);
766 * Note: Because this address is
767 * not permanent, lifetime <
768 * LONG_MAX / HZ here.
770 if (time_before(expires
,
771 ifa
->tstamp
+ lifetime
* HZ
))
772 expires
= ifa
->tstamp
+ lifetime
* HZ
;
773 spin_unlock(&ifa
->lock
);
778 write_unlock_bh(&idev
->lock
);
780 addrconf_del_timer(ifp
);
782 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
784 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifp
);
787 * Purge or update corresponding prefix
789 * 1) we don't purge prefix here if address was not permanent.
790 * prefix is managed by its own lifetime.
791 * 2) if there're no addresses, delete prefix.
792 * 3) if there're still other permanent address(es),
793 * corresponding prefix is still permanent.
794 * 4) otherwise, update prefix lifetime to the
795 * longest valid lifetime among the corresponding
796 * addresses on the device.
797 * Note: subsequent RA will update lifetime.
801 if ((ifp
->flags
& IFA_F_PERMANENT
) && onlink
< 1) {
802 struct in6_addr prefix
;
804 struct net
*net
= dev_net(ifp
->idev
->dev
);
805 ipv6_addr_prefix(&prefix
, &ifp
->addr
, ifp
->prefix_len
);
806 rt
= rt6_lookup(net
, &prefix
, NULL
, ifp
->idev
->dev
->ifindex
, 1);
808 if (rt
&& addrconf_is_prefix_route(rt
)) {
812 } else if (!(rt
->rt6i_flags
& RTF_EXPIRES
)) {
813 rt
->rt6i_expires
= expires
;
814 rt
->rt6i_flags
|= RTF_EXPIRES
;
817 dst_release(&rt
->u
.dst
);
823 #ifdef CONFIG_IPV6_PRIVACY
824 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
826 struct inet6_dev
*idev
= ifp
->idev
;
827 struct in6_addr addr
, *tmpaddr
;
828 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_cstamp
, tmp_tstamp
;
829 unsigned long regen_advance
;
835 write_lock(&idev
->lock
);
837 spin_lock_bh(&ift
->lock
);
838 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
839 spin_unlock_bh(&ift
->lock
);
846 if (idev
->cnf
.use_tempaddr
<= 0) {
847 write_unlock(&idev
->lock
);
849 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
854 spin_lock_bh(&ifp
->lock
);
855 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
856 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
857 spin_unlock_bh(&ifp
->lock
);
858 write_unlock(&idev
->lock
);
860 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
866 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
867 if (__ipv6_try_regen_rndid(idev
, tmpaddr
) < 0) {
868 spin_unlock_bh(&ifp
->lock
);
869 write_unlock(&idev
->lock
);
871 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
877 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
878 tmp_valid_lft
= min_t(__u32
,
880 idev
->cnf
.temp_valid_lft
);
881 tmp_prefered_lft
= min_t(__u32
,
883 idev
->cnf
.temp_prefered_lft
- desync_factor
/ HZ
);
884 tmp_plen
= ifp
->prefix_len
;
885 max_addresses
= idev
->cnf
.max_addresses
;
886 tmp_cstamp
= ifp
->cstamp
;
887 tmp_tstamp
= ifp
->tstamp
;
888 spin_unlock_bh(&ifp
->lock
);
890 regen_advance
= idev
->cnf
.regen_max_retry
*
891 idev
->cnf
.dad_transmits
*
892 idev
->nd_parms
->retrans_time
/ HZ
;
893 write_unlock(&idev
->lock
);
895 /* A temporary address is created only if this calculated Preferred
896 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
897 * an implementation must not create a temporary address with a zero
898 * Preferred Lifetime.
900 if (tmp_prefered_lft
<= regen_advance
) {
907 addr_flags
= IFA_F_TEMPORARY
;
908 /* set in addrconf_prefix_rcv() */
909 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
910 addr_flags
|= IFA_F_OPTIMISTIC
;
912 ift
= !max_addresses
||
913 ipv6_count_addresses(idev
) < max_addresses
?
914 ipv6_add_addr(idev
, &addr
, tmp_plen
,
915 ipv6_addr_type(&addr
)&IPV6_ADDR_SCOPE_MASK
,
917 if (!ift
|| IS_ERR(ift
)) {
921 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
923 write_lock(&idev
->lock
);
927 spin_lock_bh(&ift
->lock
);
929 ift
->valid_lft
= tmp_valid_lft
;
930 ift
->prefered_lft
= tmp_prefered_lft
;
931 ift
->cstamp
= tmp_cstamp
;
932 ift
->tstamp
= tmp_tstamp
;
933 spin_unlock_bh(&ift
->lock
);
935 addrconf_dad_start(ift
, 0);
944 * Choose an appropriate source address (RFC3484)
947 IPV6_SADDR_RULE_INIT
= 0,
948 IPV6_SADDR_RULE_LOCAL
,
949 IPV6_SADDR_RULE_SCOPE
,
950 IPV6_SADDR_RULE_PREFERRED
,
951 #ifdef CONFIG_IPV6_MIP6
955 IPV6_SADDR_RULE_LABEL
,
956 #ifdef CONFIG_IPV6_PRIVACY
957 IPV6_SADDR_RULE_PRIVACY
,
959 IPV6_SADDR_RULE_ORCHID
,
960 IPV6_SADDR_RULE_PREFIX
,
964 struct ipv6_saddr_score
{
967 struct inet6_ifaddr
*ifa
;
968 DECLARE_BITMAP(scorebits
, IPV6_SADDR_RULE_MAX
);
973 struct ipv6_saddr_dst
{
974 const struct in6_addr
*addr
;
981 static inline int ipv6_saddr_preferred(int type
)
983 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|IPV6_ADDR_LOOPBACK
))
988 static int ipv6_get_saddr_eval(struct net
*net
,
989 struct ipv6_saddr_score
*score
,
990 struct ipv6_saddr_dst
*dst
,
995 if (i
<= score
->rule
) {
997 case IPV6_SADDR_RULE_SCOPE
:
998 ret
= score
->scopedist
;
1000 case IPV6_SADDR_RULE_PREFIX
:
1001 ret
= score
->matchlen
;
1004 ret
= !!test_bit(i
, score
->scorebits
);
1010 case IPV6_SADDR_RULE_INIT
:
1011 /* Rule 0: remember if hiscore is not ready yet */
1014 case IPV6_SADDR_RULE_LOCAL
:
1015 /* Rule 1: Prefer same address */
1016 ret
= ipv6_addr_equal(&score
->ifa
->addr
, dst
->addr
);
1018 case IPV6_SADDR_RULE_SCOPE
:
1019 /* Rule 2: Prefer appropriate scope
1024 * ---+--+-+---> scope
1026 * | d is scope of the destination.
1028 * | \ <- smaller scope is better if
1029 * B-15 | \ if scope is enough for destinaion.
1030 * | ret = B - scope (-1 <= scope >= d <= 15).
1032 * |/ <- greater is better
1033 * -C / if scope is not enough for destination.
1034 * /| ret = scope - C (-1 <= d < scope <= 15).
1036 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1037 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1038 * Assume B = 0 and we get C > 29.
1040 ret
= __ipv6_addr_src_scope(score
->addr_type
);
1041 if (ret
>= dst
->scope
)
1044 ret
-= 128; /* 30 is enough */
1045 score
->scopedist
= ret
;
1047 case IPV6_SADDR_RULE_PREFERRED
:
1048 /* Rule 3: Avoid deprecated and optimistic addresses */
1049 ret
= ipv6_saddr_preferred(score
->addr_type
) ||
1050 !(score
->ifa
->flags
& (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
));
1052 #ifdef CONFIG_IPV6_MIP6
1053 case IPV6_SADDR_RULE_HOA
:
1055 /* Rule 4: Prefer home address */
1056 int prefhome
= !(dst
->prefs
& IPV6_PREFER_SRC_COA
);
1057 ret
= !(score
->ifa
->flags
& IFA_F_HOMEADDRESS
) ^ prefhome
;
1061 case IPV6_SADDR_RULE_OIF
:
1062 /* Rule 5: Prefer outgoing interface */
1063 ret
= (!dst
->ifindex
||
1064 dst
->ifindex
== score
->ifa
->idev
->dev
->ifindex
);
1066 case IPV6_SADDR_RULE_LABEL
:
1067 /* Rule 6: Prefer matching label */
1068 ret
= ipv6_addr_label(net
,
1069 &score
->ifa
->addr
, score
->addr_type
,
1070 score
->ifa
->idev
->dev
->ifindex
) == dst
->label
;
1072 #ifdef CONFIG_IPV6_PRIVACY
1073 case IPV6_SADDR_RULE_PRIVACY
:
1075 /* Rule 7: Prefer public address
1076 * Note: prefer temprary address if use_tempaddr >= 2
1078 int preftmp
= dst
->prefs
& (IPV6_PREFER_SRC_PUBLIC
|IPV6_PREFER_SRC_TMP
) ?
1079 !!(dst
->prefs
& IPV6_PREFER_SRC_TMP
) :
1080 score
->ifa
->idev
->cnf
.use_tempaddr
>= 2;
1081 ret
= (!(score
->ifa
->flags
& IFA_F_TEMPORARY
)) ^ preftmp
;
1085 case IPV6_SADDR_RULE_ORCHID
:
1086 /* Rule 8-: Prefer ORCHID vs ORCHID or
1087 * non-ORCHID vs non-ORCHID
1089 ret
= !(ipv6_addr_orchid(&score
->ifa
->addr
) ^
1090 ipv6_addr_orchid(dst
->addr
));
1092 case IPV6_SADDR_RULE_PREFIX
:
1093 /* Rule 8: Use longest matching prefix */
1094 score
->matchlen
= ret
= ipv6_addr_diff(&score
->ifa
->addr
,
1102 __set_bit(i
, score
->scorebits
);
1108 int ipv6_dev_get_saddr(struct net
*net
, struct net_device
*dst_dev
,
1109 const struct in6_addr
*daddr
, unsigned int prefs
,
1110 struct in6_addr
*saddr
)
1112 struct ipv6_saddr_score scores
[2],
1113 *score
= &scores
[0], *hiscore
= &scores
[1];
1114 struct ipv6_saddr_dst dst
;
1115 struct net_device
*dev
;
1118 dst_type
= __ipv6_addr_type(daddr
);
1120 dst
.ifindex
= dst_dev
? dst_dev
->ifindex
: 0;
1121 dst
.scope
= __ipv6_addr_src_scope(dst_type
);
1122 dst
.label
= ipv6_addr_label(net
, daddr
, dst_type
, dst
.ifindex
);
1126 hiscore
->ifa
= NULL
;
1130 for_each_netdev_rcu(net
, dev
) {
1131 struct inet6_dev
*idev
;
1133 /* Candidate Source Address (section 4)
1134 * - multicast and link-local destination address,
1135 * the set of candidate source address MUST only
1136 * include addresses assigned to interfaces
1137 * belonging to the same link as the outgoing
1139 * (- For site-local destination addresses, the
1140 * set of candidate source addresses MUST only
1141 * include addresses assigned to interfaces
1142 * belonging to the same site as the outgoing
1145 if (((dst_type
& IPV6_ADDR_MULTICAST
) ||
1146 dst
.scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
) &&
1147 dst
.ifindex
&& dev
->ifindex
!= dst
.ifindex
)
1150 idev
= __in6_dev_get(dev
);
1154 read_lock_bh(&idev
->lock
);
1155 list_for_each_entry(score
->ifa
, &idev
->addr_list
, if_list
) {
1159 * - Tentative Address (RFC2462 section 5.4)
1160 * - A tentative address is not considered
1161 * "assigned to an interface" in the traditional
1162 * sense, unless it is also flagged as optimistic.
1163 * - Candidate Source Address (section 4)
1164 * - In any case, anycast addresses, multicast
1165 * addresses, and the unspecified address MUST
1166 * NOT be included in a candidate set.
1168 if ((score
->ifa
->flags
& IFA_F_TENTATIVE
) &&
1169 (!(score
->ifa
->flags
& IFA_F_OPTIMISTIC
)))
1172 score
->addr_type
= __ipv6_addr_type(&score
->ifa
->addr
);
1174 if (unlikely(score
->addr_type
== IPV6_ADDR_ANY
||
1175 score
->addr_type
& IPV6_ADDR_MULTICAST
)) {
1176 LIMIT_NETDEBUG(KERN_DEBUG
1177 "ADDRCONF: unspecified / multicast address "
1178 "assigned as unicast address on %s",
1184 bitmap_zero(score
->scorebits
, IPV6_SADDR_RULE_MAX
);
1186 for (i
= 0; i
< IPV6_SADDR_RULE_MAX
; i
++) {
1187 int minihiscore
, miniscore
;
1189 minihiscore
= ipv6_get_saddr_eval(net
, hiscore
, &dst
, i
);
1190 miniscore
= ipv6_get_saddr_eval(net
, score
, &dst
, i
);
1192 if (minihiscore
> miniscore
) {
1193 if (i
== IPV6_SADDR_RULE_SCOPE
&&
1194 score
->scopedist
> 0) {
1197 * each remaining entry
1198 * has too small (not enough)
1199 * scope, because ifa entries
1200 * are sorted by their scope
1206 } else if (minihiscore
< miniscore
) {
1208 in6_ifa_put(hiscore
->ifa
);
1210 in6_ifa_hold(score
->ifa
);
1212 swap(hiscore
, score
);
1214 /* restore our iterator */
1215 score
->ifa
= hiscore
->ifa
;
1222 read_unlock_bh(&idev
->lock
);
1227 return -EADDRNOTAVAIL
;
1229 ipv6_addr_copy(saddr
, &hiscore
->ifa
->addr
);
1230 in6_ifa_put(hiscore
->ifa
);
1233 EXPORT_SYMBOL(ipv6_dev_get_saddr
);
1235 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1236 unsigned char banned_flags
)
1238 struct inet6_dev
*idev
;
1239 int err
= -EADDRNOTAVAIL
;
1242 idev
= __in6_dev_get(dev
);
1244 struct inet6_ifaddr
*ifp
;
1246 read_lock_bh(&idev
->lock
);
1247 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
1248 if (ifp
->scope
== IFA_LINK
&&
1249 !(ifp
->flags
& banned_flags
)) {
1250 ipv6_addr_copy(addr
, &ifp
->addr
);
1255 read_unlock_bh(&idev
->lock
);
1261 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1264 struct inet6_ifaddr
*ifp
;
1266 read_lock_bh(&idev
->lock
);
1267 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
)
1269 read_unlock_bh(&idev
->lock
);
1273 int ipv6_chk_addr(struct net
*net
, struct in6_addr
*addr
,
1274 struct net_device
*dev
, int strict
)
1276 struct inet6_ifaddr
*ifp
= NULL
;
1277 struct hlist_node
*node
;
1278 unsigned int hash
= ipv6_addr_hash(addr
);
1281 hlist_for_each_entry_rcu(ifp
, node
, &inet6_addr_lst
[hash
], addr_lst
) {
1282 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1284 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1285 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1286 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1287 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))
1291 rcu_read_unlock_bh();
1295 EXPORT_SYMBOL(ipv6_chk_addr
);
1297 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
1298 struct net_device
*dev
)
1300 unsigned int hash
= ipv6_addr_hash(addr
);
1301 struct inet6_ifaddr
*ifp
;
1302 struct hlist_node
*node
;
1304 hlist_for_each_entry(ifp
, node
, &inet6_addr_lst
[hash
], addr_lst
) {
1305 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1307 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1308 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1315 int ipv6_chk_prefix(struct in6_addr
*addr
, struct net_device
*dev
)
1317 struct inet6_dev
*idev
;
1318 struct inet6_ifaddr
*ifa
;
1323 idev
= __in6_dev_get(dev
);
1325 read_lock_bh(&idev
->lock
);
1326 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
1327 onlink
= ipv6_prefix_equal(addr
, &ifa
->addr
,
1332 read_unlock_bh(&idev
->lock
);
1338 EXPORT_SYMBOL(ipv6_chk_prefix
);
1340 struct inet6_ifaddr
*ipv6_get_ifaddr(struct net
*net
, const struct in6_addr
*addr
,
1341 struct net_device
*dev
, int strict
)
1343 struct inet6_ifaddr
*ifp
, *result
= NULL
;
1344 unsigned int hash
= ipv6_addr_hash(addr
);
1345 struct hlist_node
*node
;
1348 hlist_for_each_entry_rcu(ifp
, node
, &inet6_addr_lst
[hash
], addr_lst
) {
1349 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1351 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1352 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1353 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1360 rcu_read_unlock_bh();
1365 /* Gets referenced address, destroys ifaddr */
1367 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
, int dad_failed
)
1369 if (ifp
->flags
&IFA_F_PERMANENT
) {
1370 spin_lock_bh(&ifp
->lock
);
1371 addrconf_del_timer(ifp
);
1372 ifp
->flags
|= IFA_F_TENTATIVE
;
1374 ifp
->flags
|= IFA_F_DADFAILED
;
1375 spin_unlock_bh(&ifp
->lock
);
1377 ipv6_ifa_notify(0, ifp
);
1379 #ifdef CONFIG_IPV6_PRIVACY
1380 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1381 struct inet6_ifaddr
*ifpub
;
1382 spin_lock_bh(&ifp
->lock
);
1385 in6_ifa_hold(ifpub
);
1386 spin_unlock_bh(&ifp
->lock
);
1387 ipv6_create_tempaddr(ifpub
, ifp
);
1390 spin_unlock_bh(&ifp
->lock
);
1398 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1400 struct inet6_dev
*idev
= ifp
->idev
;
1402 if (net_ratelimit())
1403 printk(KERN_INFO
"%s: IPv6 duplicate address %pI6c detected!\n",
1404 ifp
->idev
->dev
->name
, &ifp
->addr
);
1406 if (idev
->cnf
.accept_dad
> 1 && !idev
->cnf
.disable_ipv6
) {
1407 struct in6_addr addr
;
1409 addr
.s6_addr32
[0] = htonl(0xfe800000);
1410 addr
.s6_addr32
[1] = 0;
1412 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) &&
1413 ipv6_addr_equal(&ifp
->addr
, &addr
)) {
1414 /* DAD failed for link-local based on MAC address */
1415 idev
->cnf
.disable_ipv6
= 1;
1417 printk(KERN_INFO
"%s: IPv6 being disabled!\n",
1418 ifp
->idev
->dev
->name
);
1422 addrconf_dad_stop(ifp
, 1);
1425 /* Join to solicited addr multicast group. */
1427 void addrconf_join_solict(struct net_device
*dev
, struct in6_addr
*addr
)
1429 struct in6_addr maddr
;
1431 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1434 addrconf_addr_solict_mult(addr
, &maddr
);
1435 ipv6_dev_mc_inc(dev
, &maddr
);
1438 void addrconf_leave_solict(struct inet6_dev
*idev
, struct in6_addr
*addr
)
1440 struct in6_addr maddr
;
1442 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1445 addrconf_addr_solict_mult(addr
, &maddr
);
1446 __ipv6_dev_mc_dec(idev
, &maddr
);
1449 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1451 struct in6_addr addr
;
1452 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1453 if (ipv6_addr_any(&addr
))
1455 ipv6_dev_ac_inc(ifp
->idev
->dev
, &addr
);
1458 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1460 struct in6_addr addr
;
1461 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1462 if (ipv6_addr_any(&addr
))
1464 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1467 static int addrconf_ifid_eui48(u8
*eui
, struct net_device
*dev
)
1469 if (dev
->addr_len
!= ETH_ALEN
)
1471 memcpy(eui
, dev
->dev_addr
, 3);
1472 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1475 * The zSeries OSA network cards can be shared among various
1476 * OS instances, but the OSA cards have only one MAC address.
1477 * This leads to duplicate address conflicts in conjunction
1478 * with IPv6 if more than one instance uses the same card.
1480 * The driver for these cards can deliver a unique 16-bit
1481 * identifier for each instance sharing the same card. It is
1482 * placed instead of 0xFFFE in the interface identifier. The
1483 * "u" bit of the interface identifier is not inverted in this
1484 * case. Hence the resulting interface identifier has local
1485 * scope according to RFC2373.
1488 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1489 eui
[4] = dev
->dev_id
& 0xFF;
1498 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
1500 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1501 if (dev
->addr_len
!= ARCNET_ALEN
)
1504 eui
[7] = *(u8
*)dev
->dev_addr
;
1508 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
1510 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1512 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1517 int __ipv6_isatap_ifid(u8
*eui
, __be32 addr
)
1521 eui
[0] = (ipv4_is_zeronet(addr
) || ipv4_is_private_10(addr
) ||
1522 ipv4_is_loopback(addr
) || ipv4_is_linklocal_169(addr
) ||
1523 ipv4_is_private_172(addr
) || ipv4_is_test_192(addr
) ||
1524 ipv4_is_anycast_6to4(addr
) || ipv4_is_private_192(addr
) ||
1525 ipv4_is_test_198(addr
) || ipv4_is_multicast(addr
) ||
1526 ipv4_is_lbcast(addr
)) ? 0x00 : 0x02;
1530 memcpy(eui
+ 4, &addr
, 4);
1533 EXPORT_SYMBOL(__ipv6_isatap_ifid
);
1535 static int addrconf_ifid_sit(u8
*eui
, struct net_device
*dev
)
1537 if (dev
->priv_flags
& IFF_ISATAP
)
1538 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
1542 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1544 switch (dev
->type
) {
1547 case ARPHRD_IEEE802_TR
:
1548 return addrconf_ifid_eui48(eui
, dev
);
1550 return addrconf_ifid_arcnet(eui
, dev
);
1551 case ARPHRD_INFINIBAND
:
1552 return addrconf_ifid_infiniband(eui
, dev
);
1554 return addrconf_ifid_sit(eui
, dev
);
1559 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1562 struct inet6_ifaddr
*ifp
;
1564 read_lock_bh(&idev
->lock
);
1565 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
1566 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1567 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1572 read_unlock_bh(&idev
->lock
);
1576 #ifdef CONFIG_IPV6_PRIVACY
1577 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1578 static int __ipv6_regen_rndid(struct inet6_dev
*idev
)
1581 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
1582 idev
->rndid
[0] &= ~0x02;
1585 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1586 * check if generated address is not inappropriate
1588 * - Reserved subnet anycast (RFC 2526)
1589 * 11111101 11....11 1xxxxxxx
1590 * - ISATAP (RFC4214) 6.1
1591 * 00-00-5E-FE-xx-xx-xx-xx
1593 * - XXX: already assigned to an address on the device
1595 if (idev
->rndid
[0] == 0xfd &&
1596 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1597 (idev
->rndid
[7]&0x80))
1599 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1600 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1602 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1609 static void ipv6_regen_rndid(unsigned long data
)
1611 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1612 unsigned long expires
;
1615 write_lock_bh(&idev
->lock
);
1620 if (__ipv6_regen_rndid(idev
) < 0)
1624 idev
->cnf
.temp_prefered_lft
* HZ
-
1625 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
- desync_factor
;
1626 if (time_before(expires
, jiffies
)) {
1628 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1633 if (!mod_timer(&idev
->regen_timer
, expires
))
1637 write_unlock_bh(&idev
->lock
);
1638 rcu_read_unlock_bh();
1642 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
) {
1645 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1646 ret
= __ipv6_regen_rndid(idev
);
1656 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1657 unsigned long expires
, u32 flags
)
1659 struct fib6_config cfg
= {
1660 .fc_table
= RT6_TABLE_PREFIX
,
1661 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1662 .fc_ifindex
= dev
->ifindex
,
1663 .fc_expires
= expires
,
1665 .fc_flags
= RTF_UP
| flags
,
1666 .fc_nlinfo
.nl_net
= dev_net(dev
),
1667 .fc_protocol
= RTPROT_KERNEL
,
1670 ipv6_addr_copy(&cfg
.fc_dst
, pfx
);
1672 /* Prevent useless cloning on PtP SIT.
1673 This thing is done here expecting that the whole
1674 class of non-broadcast devices need not cloning.
1676 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1677 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
1678 cfg
.fc_flags
|= RTF_NONEXTHOP
;
1681 ip6_route_add(&cfg
);
1684 /* Create "default" multicast route to the interface */
1686 static void addrconf_add_mroute(struct net_device
*dev
)
1688 struct fib6_config cfg
= {
1689 .fc_table
= RT6_TABLE_LOCAL
,
1690 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1691 .fc_ifindex
= dev
->ifindex
,
1694 .fc_nlinfo
.nl_net
= dev_net(dev
),
1697 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
1699 ip6_route_add(&cfg
);
1702 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1703 static void sit_route_add(struct net_device
*dev
)
1705 struct fib6_config cfg
= {
1706 .fc_table
= RT6_TABLE_MAIN
,
1707 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1708 .fc_ifindex
= dev
->ifindex
,
1710 .fc_flags
= RTF_UP
| RTF_NONEXTHOP
,
1711 .fc_nlinfo
.nl_net
= dev_net(dev
),
1714 /* prefix length - 96 bits "::d.d.d.d" */
1715 ip6_route_add(&cfg
);
1719 static void addrconf_add_lroute(struct net_device
*dev
)
1721 struct in6_addr addr
;
1723 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
1724 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
1727 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
1729 struct inet6_dev
*idev
;
1733 idev
= ipv6_find_idev(dev
);
1737 /* Add default multicast route */
1738 addrconf_add_mroute(dev
);
1740 /* Add link local route */
1741 addrconf_add_lroute(dev
);
1745 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
)
1747 struct prefix_info
*pinfo
;
1751 struct inet6_dev
*in6_dev
;
1752 struct net
*net
= dev_net(dev
);
1754 pinfo
= (struct prefix_info
*) opt
;
1756 if (len
< sizeof(struct prefix_info
)) {
1757 ADBG(("addrconf: prefix option too short\n"));
1762 * Validation checks ([ADDRCONF], page 19)
1765 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
1767 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
1770 valid_lft
= ntohl(pinfo
->valid
);
1771 prefered_lft
= ntohl(pinfo
->prefered
);
1773 if (prefered_lft
> valid_lft
) {
1774 if (net_ratelimit())
1775 printk(KERN_WARNING
"addrconf: prefix option has invalid lifetime\n");
1779 in6_dev
= in6_dev_get(dev
);
1781 if (in6_dev
== NULL
) {
1782 if (net_ratelimit())
1783 printk(KERN_DEBUG
"addrconf: device %s not configured\n", dev
->name
);
1788 * Two things going on here:
1789 * 1) Add routes for on-link prefixes
1790 * 2) Configure prefixes with the auto flag set
1793 if (pinfo
->onlink
) {
1794 struct rt6_info
*rt
;
1795 unsigned long rt_expires
;
1797 /* Avoid arithmetic overflow. Really, we could
1798 * save rt_expires in seconds, likely valid_lft,
1799 * but it would require division in fib gc, that it
1803 rt_expires
= addrconf_timeout_fixup(valid_lft
, HZ
);
1805 rt_expires
= addrconf_timeout_fixup(valid_lft
, USER_HZ
);
1807 if (addrconf_finite_timeout(rt_expires
))
1810 rt
= rt6_lookup(net
, &pinfo
->prefix
, NULL
,
1813 if (rt
&& addrconf_is_prefix_route(rt
)) {
1814 /* Autoconf prefix route */
1815 if (valid_lft
== 0) {
1818 } else if (addrconf_finite_timeout(rt_expires
)) {
1820 rt
->rt6i_expires
= jiffies
+ rt_expires
;
1821 rt
->rt6i_flags
|= RTF_EXPIRES
;
1823 rt
->rt6i_flags
&= ~RTF_EXPIRES
;
1824 rt
->rt6i_expires
= 0;
1826 } else if (valid_lft
) {
1827 clock_t expires
= 0;
1828 int flags
= RTF_ADDRCONF
| RTF_PREFIX_RT
;
1829 if (addrconf_finite_timeout(rt_expires
)) {
1831 flags
|= RTF_EXPIRES
;
1832 expires
= jiffies_to_clock_t(rt_expires
);
1834 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
1835 dev
, expires
, flags
);
1838 dst_release(&rt
->u
.dst
);
1841 /* Try to figure out our local address for this prefix */
1843 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
1844 struct inet6_ifaddr
* ifp
;
1845 struct in6_addr addr
;
1846 int create
= 0, update_lft
= 0;
1848 if (pinfo
->prefix_len
== 64) {
1849 memcpy(&addr
, &pinfo
->prefix
, 8);
1850 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
1851 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
1852 in6_dev_put(in6_dev
);
1857 if (net_ratelimit())
1858 printk(KERN_DEBUG
"IPv6 addrconf: prefix with wrong length %d\n",
1860 in6_dev_put(in6_dev
);
1865 ifp
= ipv6_get_ifaddr(net
, &addr
, dev
, 1);
1867 if (ifp
== NULL
&& valid_lft
) {
1868 int max_addresses
= in6_dev
->cnf
.max_addresses
;
1871 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1872 if (in6_dev
->cnf
.optimistic_dad
&&
1873 !net
->ipv6
.devconf_all
->forwarding
)
1874 addr_flags
= IFA_F_OPTIMISTIC
;
1877 /* Do not allow to create too much of autoconfigured
1878 * addresses; this would be too easy way to crash kernel.
1880 if (!max_addresses
||
1881 ipv6_count_addresses(in6_dev
) < max_addresses
)
1882 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
1883 addr_type
&IPV6_ADDR_SCOPE_MASK
,
1886 if (!ifp
|| IS_ERR(ifp
)) {
1887 in6_dev_put(in6_dev
);
1891 update_lft
= create
= 1;
1892 ifp
->cstamp
= jiffies
;
1893 addrconf_dad_start(ifp
, RTF_ADDRCONF
|RTF_PREFIX_RT
);
1899 #ifdef CONFIG_IPV6_PRIVACY
1900 struct inet6_ifaddr
*ift
;
1904 /* update lifetime (RFC2462 5.5.3 e) */
1905 spin_lock(&ifp
->lock
);
1907 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
1908 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
1911 if (!update_lft
&& stored_lft
) {
1912 if (valid_lft
> MIN_VALID_LIFETIME
||
1913 valid_lft
> stored_lft
)
1915 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
1916 /* valid_lft <= stored_lft is always true */
1918 * RFC 4862 Section 5.5.3e:
1919 * "Note that the preferred lifetime of
1920 * the corresponding address is always
1921 * reset to the Preferred Lifetime in
1922 * the received Prefix Information
1923 * option, regardless of whether the
1924 * valid lifetime is also reset or
1927 * So if the preferred lifetime in
1928 * this advertisement is different
1929 * than what we have stored, but the
1930 * valid lifetime is invalid, just
1931 * reset prefered_lft.
1933 * We must set the valid lifetime
1934 * to the stored lifetime since we'll
1935 * be updating the timestamp below,
1936 * else we'll set it back to the
1939 if (prefered_lft
!= ifp
->prefered_lft
) {
1940 valid_lft
= stored_lft
;
1944 valid_lft
= MIN_VALID_LIFETIME
;
1945 if (valid_lft
< prefered_lft
)
1946 prefered_lft
= valid_lft
;
1952 ifp
->valid_lft
= valid_lft
;
1953 ifp
->prefered_lft
= prefered_lft
;
1956 ifp
->flags
&= ~IFA_F_DEPRECATED
;
1957 spin_unlock(&ifp
->lock
);
1959 if (!(flags
&IFA_F_TENTATIVE
))
1960 ipv6_ifa_notify(0, ifp
);
1962 spin_unlock(&ifp
->lock
);
1964 #ifdef CONFIG_IPV6_PRIVACY
1965 read_lock_bh(&in6_dev
->lock
);
1966 /* update all temporary addresses in the list */
1967 list_for_each_entry(ift
, &in6_dev
->tempaddr_list
, tmp_list
) {
1969 * When adjusting the lifetimes of an existing
1970 * temporary address, only lower the lifetimes.
1971 * Implementations must not increase the
1972 * lifetimes of an existing temporary address
1973 * when processing a Prefix Information Option.
1975 if (ifp
!= ift
->ifpub
)
1978 spin_lock(&ift
->lock
);
1980 if (ift
->valid_lft
> valid_lft
&&
1981 ift
->valid_lft
- valid_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1982 ift
->valid_lft
= valid_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1983 if (ift
->prefered_lft
> prefered_lft
&&
1984 ift
->prefered_lft
- prefered_lft
> (jiffies
- ift
->tstamp
) / HZ
)
1985 ift
->prefered_lft
= prefered_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
1986 spin_unlock(&ift
->lock
);
1987 if (!(flags
&IFA_F_TENTATIVE
))
1988 ipv6_ifa_notify(0, ift
);
1991 if (create
&& in6_dev
->cnf
.use_tempaddr
> 0) {
1993 * When a new public address is created as described in [ADDRCONF],
1994 * also create a new temporary address.
1996 read_unlock_bh(&in6_dev
->lock
);
1997 ipv6_create_tempaddr(ifp
, NULL
);
1999 read_unlock_bh(&in6_dev
->lock
);
2006 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
2007 in6_dev_put(in6_dev
);
2011 * Set destination address.
2012 * Special case for SIT interfaces where we create a new "virtual"
2015 int addrconf_set_dstaddr(struct net
*net
, void __user
*arg
)
2017 struct in6_ifreq ireq
;
2018 struct net_device
*dev
;
2024 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2027 dev
= __dev_get_by_index(net
, ireq
.ifr6_ifindex
);
2033 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2034 if (dev
->type
== ARPHRD_SIT
) {
2035 const struct net_device_ops
*ops
= dev
->netdev_ops
;
2037 struct ip_tunnel_parm p
;
2039 err
= -EADDRNOTAVAIL
;
2040 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
2043 memset(&p
, 0, sizeof(p
));
2044 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
2048 p
.iph
.protocol
= IPPROTO_IPV6
;
2050 ifr
.ifr_ifru
.ifru_data
= (__force
void __user
*)&p
;
2052 if (ops
->ndo_do_ioctl
) {
2053 mm_segment_t oldfs
= get_fs();
2056 err
= ops
->ndo_do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
2063 dev
= __dev_get_by_name(net
, p
.name
);
2066 err
= dev_open(dev
);
2077 * Manual configuration of address on an interface
2079 static int inet6_addr_add(struct net
*net
, int ifindex
, struct in6_addr
*pfx
,
2080 unsigned int plen
, __u8 ifa_flags
, __u32 prefered_lft
,
2083 struct inet6_ifaddr
*ifp
;
2084 struct inet6_dev
*idev
;
2085 struct net_device
*dev
;
2089 unsigned long timeout
;
2096 /* check the lifetime */
2097 if (!valid_lft
|| prefered_lft
> valid_lft
)
2100 dev
= __dev_get_by_index(net
, ifindex
);
2104 if ((idev
= addrconf_add_dev(dev
)) == NULL
)
2107 scope
= ipv6_addr_scope(pfx
);
2109 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
2110 if (addrconf_finite_timeout(timeout
)) {
2111 expires
= jiffies_to_clock_t(timeout
* HZ
);
2112 valid_lft
= timeout
;
2113 flags
= RTF_EXPIRES
;
2117 ifa_flags
|= IFA_F_PERMANENT
;
2120 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
2121 if (addrconf_finite_timeout(timeout
)) {
2123 ifa_flags
|= IFA_F_DEPRECATED
;
2124 prefered_lft
= timeout
;
2127 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, ifa_flags
);
2130 spin_lock_bh(&ifp
->lock
);
2131 ifp
->valid_lft
= valid_lft
;
2132 ifp
->prefered_lft
= prefered_lft
;
2133 ifp
->tstamp
= jiffies
;
2134 spin_unlock_bh(&ifp
->lock
);
2136 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
2139 * Note that section 3.1 of RFC 4429 indicates
2140 * that the Optimistic flag should not be set for
2141 * manually configured addresses
2143 addrconf_dad_start(ifp
, 0);
2149 return PTR_ERR(ifp
);
2152 static int inet6_addr_del(struct net
*net
, int ifindex
, struct in6_addr
*pfx
,
2155 struct inet6_ifaddr
*ifp
;
2156 struct inet6_dev
*idev
;
2157 struct net_device
*dev
;
2162 dev
= __dev_get_by_index(net
, ifindex
);
2166 if ((idev
= __in6_dev_get(dev
)) == NULL
)
2169 read_lock_bh(&idev
->lock
);
2170 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
2171 if (ifp
->prefix_len
== plen
&&
2172 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
2174 read_unlock_bh(&idev
->lock
);
2178 /* If the last address is deleted administratively,
2179 disable IPv6 on this interface.
2181 if (list_empty(&idev
->addr_list
))
2182 addrconf_ifdown(idev
->dev
, 1);
2186 read_unlock_bh(&idev
->lock
);
2187 return -EADDRNOTAVAIL
;
2191 int addrconf_add_ifaddr(struct net
*net
, void __user
*arg
)
2193 struct in6_ifreq ireq
;
2196 if (!capable(CAP_NET_ADMIN
))
2199 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2203 err
= inet6_addr_add(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2204 ireq
.ifr6_prefixlen
, IFA_F_PERMANENT
,
2205 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2210 int addrconf_del_ifaddr(struct net
*net
, void __user
*arg
)
2212 struct in6_ifreq ireq
;
2215 if (!capable(CAP_NET_ADMIN
))
2218 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2222 err
= inet6_addr_del(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2223 ireq
.ifr6_prefixlen
);
2228 static void add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
2229 int plen
, int scope
)
2231 struct inet6_ifaddr
*ifp
;
2233 ifp
= ipv6_add_addr(idev
, addr
, plen
, scope
, IFA_F_PERMANENT
);
2235 spin_lock_bh(&ifp
->lock
);
2236 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2237 spin_unlock_bh(&ifp
->lock
);
2238 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2243 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2244 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
2246 struct in6_addr addr
;
2247 struct net_device
*dev
;
2248 struct net
*net
= dev_net(idev
->dev
);
2253 memset(&addr
, 0, sizeof(struct in6_addr
));
2254 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
2256 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
2257 addr
.s6_addr32
[0] = htonl(0xfe800000);
2260 scope
= IPV6_ADDR_COMPATv4
;
2263 if (addr
.s6_addr32
[3]) {
2264 add_addr(idev
, &addr
, 128, scope
);
2268 for_each_netdev(net
, dev
) {
2269 struct in_device
* in_dev
= __in_dev_get_rtnl(dev
);
2270 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
2271 struct in_ifaddr
* ifa
;
2275 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
2278 addr
.s6_addr32
[3] = ifa
->ifa_local
;
2280 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
2282 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
2283 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2287 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2292 add_addr(idev
, &addr
, plen
, flag
);
2299 static void init_loopback(struct net_device
*dev
)
2301 struct inet6_dev
*idev
;
2307 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2308 printk(KERN_DEBUG
"init loopback: add_dev failed\n");
2312 add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
);
2315 static void addrconf_add_linklocal(struct inet6_dev
*idev
, struct in6_addr
*addr
)
2317 struct inet6_ifaddr
* ifp
;
2318 u32 addr_flags
= IFA_F_PERMANENT
;
2320 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2321 if (idev
->cnf
.optimistic_dad
&&
2322 !dev_net(idev
->dev
)->ipv6
.devconf_all
->forwarding
)
2323 addr_flags
|= IFA_F_OPTIMISTIC
;
2327 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, addr_flags
);
2329 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
2330 addrconf_dad_start(ifp
, 0);
2335 static void addrconf_dev_config(struct net_device
*dev
)
2337 struct in6_addr addr
;
2338 struct inet6_dev
* idev
;
2342 if ((dev
->type
!= ARPHRD_ETHER
) &&
2343 (dev
->type
!= ARPHRD_FDDI
) &&
2344 (dev
->type
!= ARPHRD_IEEE802_TR
) &&
2345 (dev
->type
!= ARPHRD_ARCNET
) &&
2346 (dev
->type
!= ARPHRD_INFINIBAND
)) {
2347 /* Alas, we support only Ethernet autoconfiguration. */
2351 idev
= addrconf_add_dev(dev
);
2355 memset(&addr
, 0, sizeof(struct in6_addr
));
2356 addr
.s6_addr32
[0] = htonl(0xFE800000);
2358 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
2359 addrconf_add_linklocal(idev
, &addr
);
2362 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2363 static void addrconf_sit_config(struct net_device
*dev
)
2365 struct inet6_dev
*idev
;
2370 * Configure the tunnel with one of our IPv4
2371 * addresses... we should configure all of
2372 * our v4 addrs in the tunnel
2375 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2376 printk(KERN_DEBUG
"init sit: add_dev failed\n");
2380 if (dev
->priv_flags
& IFF_ISATAP
) {
2381 struct in6_addr addr
;
2383 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2384 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
2385 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
))
2386 addrconf_add_linklocal(idev
, &addr
);
2390 sit_add_v4_addrs(idev
);
2392 if (dev
->flags
&IFF_POINTOPOINT
) {
2393 addrconf_add_mroute(dev
);
2394 addrconf_add_lroute(dev
);
2401 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
2403 struct in6_addr lladdr
;
2405 if (!ipv6_get_lladdr(link_dev
, &lladdr
, IFA_F_TENTATIVE
)) {
2406 addrconf_add_linklocal(idev
, &lladdr
);
2412 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
2414 struct net_device
*link_dev
;
2415 struct net
*net
= dev_net(idev
->dev
);
2417 /* first try to inherit the link-local address from the link device */
2418 if (idev
->dev
->iflink
&&
2419 (link_dev
= __dev_get_by_index(net
, idev
->dev
->iflink
))) {
2420 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2423 /* then try to inherit it from any device */
2424 for_each_netdev(net
, link_dev
) {
2425 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2428 printk(KERN_DEBUG
"init ip6-ip6: add_linklocal failed\n");
2432 * Autoconfigure tunnel with a link-local address so routing protocols,
2433 * DHCPv6, MLD etc. can be run over the virtual link
2436 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
2438 struct inet6_dev
*idev
;
2442 idev
= addrconf_add_dev(dev
);
2444 printk(KERN_DEBUG
"init ip6-ip6: add_dev failed\n");
2447 ip6_tnl_add_linklocal(idev
);
2450 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
2453 struct net_device
*dev
= (struct net_device
*) data
;
2454 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2455 int run_pending
= 0;
2459 case NETDEV_REGISTER
:
2460 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2461 idev
= ipv6_add_dev(dev
);
2463 return notifier_from_errno(-ENOMEM
);
2469 if (dev
->flags
& IFF_SLAVE
)
2472 if (event
== NETDEV_UP
) {
2473 if (!addrconf_qdisc_ok(dev
)) {
2474 /* device is not ready yet. */
2476 "ADDRCONF(NETDEV_UP): %s: "
2477 "link is not ready\n",
2482 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
)
2483 idev
= ipv6_add_dev(dev
);
2486 idev
->if_flags
|= IF_READY
;
2490 if (!addrconf_qdisc_ok(dev
)) {
2491 /* device is still not ready. */
2496 if (idev
->if_flags
& IF_READY
)
2497 /* device is already configured. */
2499 idev
->if_flags
|= IF_READY
;
2503 "ADDRCONF(NETDEV_CHANGE): %s: "
2504 "link becomes ready\n",
2510 switch (dev
->type
) {
2511 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2513 addrconf_sit_config(dev
);
2516 case ARPHRD_TUNNEL6
:
2517 addrconf_ip6_tnl_config(dev
);
2519 case ARPHRD_LOOPBACK
:
2524 addrconf_dev_config(dev
);
2530 addrconf_dad_run(idev
);
2533 * If the MTU changed during the interface down,
2534 * when the interface up, the changed MTU must be
2535 * reflected in the idev as well as routers.
2537 if (idev
->cnf
.mtu6
!= dev
->mtu
&&
2538 dev
->mtu
>= IPV6_MIN_MTU
) {
2539 rt6_mtu_change(dev
, dev
->mtu
);
2540 idev
->cnf
.mtu6
= dev
->mtu
;
2542 idev
->tstamp
= jiffies
;
2543 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2546 * If the changed mtu during down is lower than
2547 * IPV6_MIN_MTU stop IPv6 on this interface.
2549 if (dev
->mtu
< IPV6_MIN_MTU
)
2550 addrconf_ifdown(dev
, 1);
2554 case NETDEV_CHANGEMTU
:
2555 if (idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2556 rt6_mtu_change(dev
, dev
->mtu
);
2557 idev
->cnf
.mtu6
= dev
->mtu
;
2561 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2562 idev
= ipv6_add_dev(dev
);
2568 * MTU falled under IPV6_MIN_MTU.
2569 * 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
);
2591 case NETDEV_PRE_TYPE_CHANGE
:
2592 case NETDEV_POST_TYPE_CHANGE
:
2593 addrconf_type_change(dev
, event
);
2601 * addrconf module should be notified of a device going up
2603 static struct notifier_block ipv6_dev_notf
= {
2604 .notifier_call
= addrconf_notify
,
2607 static void addrconf_type_change(struct net_device
*dev
, unsigned long event
)
2609 struct inet6_dev
*idev
;
2612 idev
= __in6_dev_get(dev
);
2614 if (event
== NETDEV_POST_TYPE_CHANGE
)
2615 ipv6_mc_remap(idev
);
2616 else if (event
== NETDEV_PRE_TYPE_CHANGE
)
2617 ipv6_mc_unmap(idev
);
2620 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2622 struct net
*net
= dev_net(dev
);
2623 struct inet6_dev
*idev
;
2624 struct inet6_ifaddr
*ifa
;
2625 LIST_HEAD(keep_list
);
2629 rt6_ifdown(net
, dev
);
2630 neigh_ifdown(&nd_tbl
, dev
);
2632 idev
= __in6_dev_get(dev
);
2637 * Step 1: remove reference to ipv6 device from parent device.
2643 /* protected by rtnl_lock */
2644 rcu_assign_pointer(dev
->ip6_ptr
, NULL
);
2646 /* Step 1.5: remove snmp6 entry */
2647 snmp6_unregister_dev(idev
);
2651 write_lock_bh(&idev
->lock
);
2653 /* Step 2: clear flags for stateless addrconf */
2655 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
2657 #ifdef CONFIG_IPV6_PRIVACY
2658 if (how
&& del_timer(&idev
->regen_timer
))
2661 /* Step 3: clear tempaddr list */
2662 while (!list_empty(&idev
->tempaddr_list
)) {
2663 ifa
= list_first_entry(&idev
->tempaddr_list
,
2664 struct inet6_ifaddr
, tmp_list
);
2665 list_del(&ifa
->tmp_list
);
2667 write_unlock_bh(&idev
->lock
);
2668 spin_lock_bh(&ifa
->lock
);
2671 in6_ifa_put(ifa
->ifpub
);
2674 spin_unlock_bh(&ifa
->lock
);
2676 write_lock_bh(&idev
->lock
);
2680 while (!list_empty(&idev
->addr_list
)) {
2681 ifa
= list_first_entry(&idev
->addr_list
,
2682 struct inet6_ifaddr
, if_list
);
2683 addrconf_del_timer(ifa
);
2685 /* If just doing link down, and address is permanent
2686 and not link-local, then retain it. */
2688 (ifa
->flags
&IFA_F_PERMANENT
) &&
2689 !(ipv6_addr_type(&ifa
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
2690 list_move_tail(&ifa
->if_list
, &keep_list
);
2692 /* If not doing DAD on this address, just keep it. */
2693 if ((dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
)) ||
2694 idev
->cnf
.accept_dad
<= 0 ||
2695 (ifa
->flags
& IFA_F_NODAD
))
2698 /* If it was tentative already, no need to notify */
2699 if (ifa
->flags
& IFA_F_TENTATIVE
)
2702 /* Flag it for later restoration when link comes up */
2703 ifa
->flags
|= IFA_F_TENTATIVE
;
2705 write_unlock_bh(&idev
->lock
);
2707 list_del(&ifa
->if_list
);
2709 write_unlock_bh(&idev
->lock
);
2711 /* clear hash table */
2712 spin_lock_bh(&addrconf_hash_lock
);
2713 hlist_del_init_rcu(&ifa
->addr_lst
);
2714 spin_unlock_bh(&addrconf_hash_lock
);
2717 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
2719 atomic_notifier_call_chain(&inet6addr_chain
,
2723 write_lock_bh(&idev
->lock
);
2726 list_splice(&keep_list
, &idev
->addr_list
);
2728 write_unlock_bh(&idev
->lock
);
2730 /* Step 5: Discard multicast list */
2732 ipv6_mc_destroy_dev(idev
);
2736 idev
->tstamp
= jiffies
;
2738 /* Last: Shot the device (if unregistered) */
2740 addrconf_sysctl_unregister(idev
);
2741 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
2742 neigh_ifdown(&nd_tbl
, dev
);
2748 static void addrconf_rs_timer(unsigned long data
)
2750 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2751 struct inet6_dev
*idev
= ifp
->idev
;
2753 read_lock(&idev
->lock
);
2754 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
))
2757 if (idev
->cnf
.forwarding
)
2760 /* Announcement received after solicitation was sent */
2761 if (idev
->if_flags
& IF_RA_RCVD
)
2764 spin_lock(&ifp
->lock
);
2765 if (ifp
->probes
++ < idev
->cnf
.rtr_solicits
) {
2766 /* The wait after the last probe can be shorter */
2767 addrconf_mod_timer(ifp
, AC_RS
,
2768 (ifp
->probes
== idev
->cnf
.rtr_solicits
) ?
2769 idev
->cnf
.rtr_solicit_delay
:
2770 idev
->cnf
.rtr_solicit_interval
);
2771 spin_unlock(&ifp
->lock
);
2773 ndisc_send_rs(idev
->dev
, &ifp
->addr
, &in6addr_linklocal_allrouters
);
2775 spin_unlock(&ifp
->lock
);
2777 * Note: we do not support deprecated "all on-link"
2778 * assumption any longer.
2780 printk(KERN_DEBUG
"%s: no IPv6 routers present\n",
2785 read_unlock(&idev
->lock
);
2790 * Duplicate Address Detection
2792 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
2794 unsigned long rand_num
;
2795 struct inet6_dev
*idev
= ifp
->idev
;
2797 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
2800 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
2802 ifp
->probes
= idev
->cnf
.dad_transmits
;
2803 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
2806 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
)
2808 struct inet6_dev
*idev
= ifp
->idev
;
2809 struct net_device
*dev
= idev
->dev
;
2811 addrconf_join_solict(dev
, &ifp
->addr
);
2813 net_srandom(ifp
->addr
.s6_addr32
[3]);
2815 read_lock_bh(&idev
->lock
);
2819 spin_lock(&ifp
->lock
);
2820 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
2821 idev
->cnf
.accept_dad
< 1 ||
2822 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
2823 ifp
->flags
& IFA_F_NODAD
) {
2824 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
2825 spin_unlock(&ifp
->lock
);
2826 read_unlock_bh(&idev
->lock
);
2828 addrconf_dad_completed(ifp
);
2832 if (!(idev
->if_flags
& IF_READY
)) {
2833 spin_unlock(&ifp
->lock
);
2834 read_unlock_bh(&idev
->lock
);
2836 * If the device is not ready:
2837 * - keep it tentative if it is a permanent address.
2838 * - otherwise, kill it.
2841 addrconf_dad_stop(ifp
, 0);
2846 * Optimistic nodes can start receiving
2849 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
2850 ip6_ins_rt(ifp
->rt
);
2852 addrconf_dad_kick(ifp
);
2853 spin_unlock(&ifp
->lock
);
2855 read_unlock_bh(&idev
->lock
);
2858 static void addrconf_dad_timer(unsigned long data
)
2860 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2861 struct inet6_dev
*idev
= ifp
->idev
;
2862 struct in6_addr mcaddr
;
2864 read_lock(&idev
->lock
);
2865 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
)) {
2866 read_unlock(&idev
->lock
);
2870 spin_lock(&ifp
->lock
);
2871 if (ifp
->probes
== 0) {
2873 * DAD was successful
2876 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
2877 spin_unlock(&ifp
->lock
);
2878 read_unlock(&idev
->lock
);
2880 addrconf_dad_completed(ifp
);
2886 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
2887 spin_unlock(&ifp
->lock
);
2888 read_unlock(&idev
->lock
);
2890 /* send a neighbour solicitation for our addr */
2891 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
2892 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &in6addr_any
);
2897 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
2899 struct net_device
*dev
= ifp
->idev
->dev
;
2902 * Configure the address for reception. Now it is valid.
2905 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2907 /* If added prefix is link local and forwarding is off,
2908 start sending router solicitations.
2911 if (ifp
->idev
->cnf
.forwarding
== 0 &&
2912 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
2913 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
2914 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
2916 * If a host as already performed a random delay
2917 * [...] as part of DAD [...] there is no need
2918 * to delay again before sending the first RS
2920 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &in6addr_linklocal_allrouters
);
2922 spin_lock_bh(&ifp
->lock
);
2924 ifp
->idev
->if_flags
|= IF_RS_SENT
;
2925 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
2926 spin_unlock_bh(&ifp
->lock
);
2930 static void addrconf_dad_run(struct inet6_dev
*idev
)
2932 struct inet6_ifaddr
*ifp
;
2934 read_lock_bh(&idev
->lock
);
2935 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
2936 spin_lock(&ifp
->lock
);
2937 if (!(ifp
->flags
& IFA_F_TENTATIVE
)) {
2938 spin_unlock(&ifp
->lock
);
2941 spin_unlock(&ifp
->lock
);
2942 addrconf_dad_kick(ifp
);
2944 read_unlock_bh(&idev
->lock
);
2947 #ifdef CONFIG_PROC_FS
2948 struct if6_iter_state
{
2949 struct seq_net_private p
;
2953 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
)
2955 struct inet6_ifaddr
*ifa
= NULL
;
2956 struct if6_iter_state
*state
= seq
->private;
2957 struct net
*net
= seq_file_net(seq
);
2959 for (state
->bucket
= 0; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
2960 struct hlist_node
*n
;
2961 hlist_for_each_entry_rcu(ifa
, n
, &inet6_addr_lst
[state
->bucket
],
2963 if (net_eq(dev_net(ifa
->idev
->dev
), net
))
2969 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
,
2970 struct inet6_ifaddr
*ifa
)
2972 struct if6_iter_state
*state
= seq
->private;
2973 struct net
*net
= seq_file_net(seq
);
2974 struct hlist_node
*n
= &ifa
->addr_lst
;
2976 hlist_for_each_entry_continue_rcu(ifa
, n
, addr_lst
)
2977 if (net_eq(dev_net(ifa
->idev
->dev
), net
))
2980 while (++state
->bucket
< IN6_ADDR_HSIZE
) {
2981 hlist_for_each_entry(ifa
, n
,
2982 &inet6_addr_lst
[state
->bucket
], addr_lst
) {
2983 if (net_eq(dev_net(ifa
->idev
->dev
), net
))
2991 static struct inet6_ifaddr
*if6_get_idx(struct seq_file
*seq
, loff_t pos
)
2993 struct inet6_ifaddr
*ifa
= if6_get_first(seq
);
2996 while (pos
&& (ifa
= if6_get_next(seq
, ifa
)) != NULL
)
2998 return pos
? NULL
: ifa
;
3001 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
3005 return if6_get_idx(seq
, *pos
);
3008 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
3010 struct inet6_ifaddr
*ifa
;
3012 ifa
= if6_get_next(seq
, v
);
3017 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
3020 rcu_read_unlock_bh();
3023 static int if6_seq_show(struct seq_file
*seq
, void *v
)
3025 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
3026 seq_printf(seq
, "%pi6 %02x %02x %02x %02x %8s\n",
3028 ifp
->idev
->dev
->ifindex
,
3032 ifp
->idev
->dev
->name
);
3036 static const struct seq_operations if6_seq_ops
= {
3037 .start
= if6_seq_start
,
3038 .next
= if6_seq_next
,
3039 .show
= if6_seq_show
,
3040 .stop
= if6_seq_stop
,
3043 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
3045 return seq_open_net(inode
, file
, &if6_seq_ops
,
3046 sizeof(struct if6_iter_state
));
3049 static const struct file_operations if6_fops
= {
3050 .owner
= THIS_MODULE
,
3051 .open
= if6_seq_open
,
3053 .llseek
= seq_lseek
,
3054 .release
= seq_release_net
,
3057 static int __net_init
if6_proc_net_init(struct net
*net
)
3059 if (!proc_net_fops_create(net
, "if_inet6", S_IRUGO
, &if6_fops
))
3064 static void __net_exit
if6_proc_net_exit(struct net
*net
)
3066 proc_net_remove(net
, "if_inet6");
3069 static struct pernet_operations if6_proc_net_ops
= {
3070 .init
= if6_proc_net_init
,
3071 .exit
= if6_proc_net_exit
,
3074 int __init
if6_proc_init(void)
3076 return register_pernet_subsys(&if6_proc_net_ops
);
3079 void if6_proc_exit(void)
3081 unregister_pernet_subsys(&if6_proc_net_ops
);
3083 #endif /* CONFIG_PROC_FS */
3085 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3086 /* Check if address is a home address configured on any interface. */
3087 int ipv6_chk_home_addr(struct net
*net
, struct in6_addr
*addr
)
3090 struct inet6_ifaddr
*ifp
= NULL
;
3091 struct hlist_node
*n
;
3092 unsigned int hash
= ipv6_addr_hash(addr
);
3095 hlist_for_each_entry_rcu(ifp
, n
, &inet6_addr_lst
[hash
], addr_lst
) {
3096 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
3098 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
3099 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
3104 rcu_read_unlock_bh();
3110 * Periodic address status verification
3113 static void addrconf_verify(unsigned long foo
)
3115 unsigned long now
, next
, next_sec
, next_sched
;
3116 struct inet6_ifaddr
*ifp
;
3117 struct hlist_node
*node
;
3121 spin_lock(&addrconf_verify_lock
);
3123 next
= round_jiffies_up(now
+ ADDR_CHECK_FREQUENCY
);
3125 del_timer(&addr_chk_timer
);
3127 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
3129 hlist_for_each_entry_rcu(ifp
, node
,
3130 &inet6_addr_lst
[i
], addr_lst
) {
3133 if (ifp
->flags
& IFA_F_PERMANENT
)
3136 spin_lock(&ifp
->lock
);
3137 /* We try to batch several events at once. */
3138 age
= (now
- ifp
->tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
3140 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
3141 age
>= ifp
->valid_lft
) {
3142 spin_unlock(&ifp
->lock
);
3146 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
3147 spin_unlock(&ifp
->lock
);
3149 } else if (age
>= ifp
->prefered_lft
) {
3150 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
3153 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
3155 ifp
->flags
|= IFA_F_DEPRECATED
;
3158 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
3159 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
3161 spin_unlock(&ifp
->lock
);
3166 ipv6_ifa_notify(0, ifp
);
3170 #ifdef CONFIG_IPV6_PRIVACY
3171 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
3172 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
3173 unsigned long regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
3174 ifp
->idev
->cnf
.dad_transmits
*
3175 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
3177 if (age
>= ifp
->prefered_lft
- regen_advance
) {
3178 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
3179 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3180 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3181 if (!ifp
->regen_count
&& ifpub
) {
3184 in6_ifa_hold(ifpub
);
3185 spin_unlock(&ifp
->lock
);
3187 spin_lock(&ifpub
->lock
);
3188 ifpub
->regen_count
= 0;
3189 spin_unlock(&ifpub
->lock
);
3190 ipv6_create_tempaddr(ifpub
, ifp
);
3195 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
3196 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
3197 spin_unlock(&ifp
->lock
);
3200 /* ifp->prefered_lft <= ifp->valid_lft */
3201 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3202 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3203 spin_unlock(&ifp
->lock
);
3208 next_sec
= round_jiffies_up(next
);
3211 /* If rounded timeout is accurate enough, accept it. */
3212 if (time_before(next_sec
, next
+ ADDRCONF_TIMER_FUZZ
))
3213 next_sched
= next_sec
;
3215 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
3216 if (time_before(next_sched
, jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
))
3217 next_sched
= jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
;
3219 ADBG((KERN_DEBUG
"now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
3220 now
, next
, next_sec
, next_sched
));
3222 addr_chk_timer
.expires
= next_sched
;
3223 add_timer(&addr_chk_timer
);
3224 spin_unlock(&addrconf_verify_lock
);
3225 rcu_read_unlock_bh();
3228 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
)
3230 struct in6_addr
*pfx
= NULL
;
3233 pfx
= nla_data(addr
);
3236 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
3239 pfx
= nla_data(local
);
3245 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
3246 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
3247 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
3248 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
3252 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3254 struct net
*net
= sock_net(skb
->sk
);
3255 struct ifaddrmsg
*ifm
;
3256 struct nlattr
*tb
[IFA_MAX
+1];
3257 struct in6_addr
*pfx
;
3260 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3264 ifm
= nlmsg_data(nlh
);
3265 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3269 return inet6_addr_del(net
, ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
3272 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u8 ifa_flags
,
3273 u32 prefered_lft
, u32 valid_lft
)
3277 unsigned long timeout
;
3279 if (!valid_lft
|| (prefered_lft
> valid_lft
))
3282 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
3283 if (addrconf_finite_timeout(timeout
)) {
3284 expires
= jiffies_to_clock_t(timeout
* HZ
);
3285 valid_lft
= timeout
;
3286 flags
= RTF_EXPIRES
;
3290 ifa_flags
|= IFA_F_PERMANENT
;
3293 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
3294 if (addrconf_finite_timeout(timeout
)) {
3296 ifa_flags
|= IFA_F_DEPRECATED
;
3297 prefered_lft
= timeout
;
3300 spin_lock_bh(&ifp
->lock
);
3301 ifp
->flags
= (ifp
->flags
& ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
| IFA_F_HOMEADDRESS
)) | ifa_flags
;
3302 ifp
->tstamp
= jiffies
;
3303 ifp
->valid_lft
= valid_lft
;
3304 ifp
->prefered_lft
= prefered_lft
;
3306 spin_unlock_bh(&ifp
->lock
);
3307 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
3308 ipv6_ifa_notify(0, ifp
);
3310 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
3318 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3320 struct net
*net
= sock_net(skb
->sk
);
3321 struct ifaddrmsg
*ifm
;
3322 struct nlattr
*tb
[IFA_MAX
+1];
3323 struct in6_addr
*pfx
;
3324 struct inet6_ifaddr
*ifa
;
3325 struct net_device
*dev
;
3326 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
3330 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3334 ifm
= nlmsg_data(nlh
);
3335 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3339 if (tb
[IFA_CACHEINFO
]) {
3340 struct ifa_cacheinfo
*ci
;
3342 ci
= nla_data(tb
[IFA_CACHEINFO
]);
3343 valid_lft
= ci
->ifa_valid
;
3344 preferred_lft
= ci
->ifa_prefered
;
3346 preferred_lft
= INFINITY_LIFE_TIME
;
3347 valid_lft
= INFINITY_LIFE_TIME
;
3350 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3354 /* We ignore other flags so far. */
3355 ifa_flags
= ifm
->ifa_flags
& (IFA_F_NODAD
| IFA_F_HOMEADDRESS
);
3357 ifa
= ipv6_get_ifaddr(net
, pfx
, dev
, 1);
3360 * It would be best to check for !NLM_F_CREATE here but
3361 * userspace alreay relies on not having to provide this.
3363 return inet6_addr_add(net
, ifm
->ifa_index
, pfx
,
3364 ifm
->ifa_prefixlen
, ifa_flags
,
3365 preferred_lft
, valid_lft
);
3368 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
3369 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
3372 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
3379 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u8 flags
,
3380 u8 scope
, int ifindex
)
3382 struct ifaddrmsg
*ifm
;
3384 ifm
= nlmsg_data(nlh
);
3385 ifm
->ifa_family
= AF_INET6
;
3386 ifm
->ifa_prefixlen
= prefixlen
;
3387 ifm
->ifa_flags
= flags
;
3388 ifm
->ifa_scope
= scope
;
3389 ifm
->ifa_index
= ifindex
;
3392 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
3393 unsigned long tstamp
, u32 preferred
, u32 valid
)
3395 struct ifa_cacheinfo ci
;
3397 ci
.cstamp
= (u32
)(TIME_DELTA(cstamp
, INITIAL_JIFFIES
) / HZ
* 100
3398 + TIME_DELTA(cstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3399 ci
.tstamp
= (u32
)(TIME_DELTA(tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3400 + TIME_DELTA(tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3401 ci
.ifa_prefered
= preferred
;
3402 ci
.ifa_valid
= valid
;
3404 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
3407 static inline int rt_scope(int ifa_scope
)
3409 if (ifa_scope
& IFA_HOST
)
3410 return RT_SCOPE_HOST
;
3411 else if (ifa_scope
& IFA_LINK
)
3412 return RT_SCOPE_LINK
;
3413 else if (ifa_scope
& IFA_SITE
)
3414 return RT_SCOPE_SITE
;
3416 return RT_SCOPE_UNIVERSE
;
3419 static inline int inet6_ifaddr_msgsize(void)
3421 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
3422 + nla_total_size(16) /* IFA_ADDRESS */
3423 + nla_total_size(sizeof(struct ifa_cacheinfo
));
3426 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
3427 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3429 struct nlmsghdr
*nlh
;
3430 u32 preferred
, valid
;
3432 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3436 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
3437 ifa
->idev
->dev
->ifindex
);
3439 if (!(ifa
->flags
&IFA_F_PERMANENT
)) {
3440 preferred
= ifa
->prefered_lft
;
3441 valid
= ifa
->valid_lft
;
3442 if (preferred
!= INFINITY_LIFE_TIME
) {
3443 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
3444 if (preferred
> tval
)
3448 if (valid
!= INFINITY_LIFE_TIME
)
3452 preferred
= INFINITY_LIFE_TIME
;
3453 valid
= INFINITY_LIFE_TIME
;
3456 if (nla_put(skb
, IFA_ADDRESS
, 16, &ifa
->addr
) < 0 ||
3457 put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0) {
3458 nlmsg_cancel(skb
, nlh
);
3462 return nlmsg_end(skb
, nlh
);
3465 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
3466 u32 pid
, u32 seq
, int event
, u16 flags
)
3468 struct nlmsghdr
*nlh
;
3469 u8 scope
= RT_SCOPE_UNIVERSE
;
3470 int ifindex
= ifmca
->idev
->dev
->ifindex
;
3472 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
3473 scope
= RT_SCOPE_SITE
;
3475 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3479 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3480 if (nla_put(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
) < 0 ||
3481 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
3482 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3483 nlmsg_cancel(skb
, nlh
);
3487 return nlmsg_end(skb
, nlh
);
3490 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
3491 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3493 struct nlmsghdr
*nlh
;
3494 u8 scope
= RT_SCOPE_UNIVERSE
;
3495 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
3497 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
3498 scope
= RT_SCOPE_SITE
;
3500 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3504 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3505 if (nla_put(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
) < 0 ||
3506 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
3507 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3508 nlmsg_cancel(skb
, nlh
);
3512 return nlmsg_end(skb
, nlh
);
3521 /* called with rcu_read_lock() */
3522 static int in6_dump_addrs(struct inet6_dev
*idev
, struct sk_buff
*skb
,
3523 struct netlink_callback
*cb
, enum addr_type_t type
,
3524 int s_ip_idx
, int *p_ip_idx
)
3526 struct ifmcaddr6
*ifmca
;
3527 struct ifacaddr6
*ifaca
;
3529 int ip_idx
= *p_ip_idx
;
3531 read_lock_bh(&idev
->lock
);
3533 case UNICAST_ADDR
: {
3534 struct inet6_ifaddr
*ifa
;
3536 /* unicast address incl. temp addr */
3537 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
3538 if (++ip_idx
< s_ip_idx
)
3540 err
= inet6_fill_ifaddr(skb
, ifa
,
3541 NETLINK_CB(cb
->skb
).pid
,
3550 case MULTICAST_ADDR
:
3551 /* multicast address */
3552 for (ifmca
= idev
->mc_list
; ifmca
;
3553 ifmca
= ifmca
->next
, ip_idx
++) {
3554 if (ip_idx
< s_ip_idx
)
3556 err
= inet6_fill_ifmcaddr(skb
, ifmca
,
3557 NETLINK_CB(cb
->skb
).pid
,
3566 /* anycast address */
3567 for (ifaca
= idev
->ac_list
; ifaca
;
3568 ifaca
= ifaca
->aca_next
, ip_idx
++) {
3569 if (ip_idx
< s_ip_idx
)
3571 err
= inet6_fill_ifacaddr(skb
, ifaca
,
3572 NETLINK_CB(cb
->skb
).pid
,
3583 read_unlock_bh(&idev
->lock
);
3588 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3589 enum addr_type_t type
)
3591 struct net
*net
= sock_net(skb
->sk
);
3594 int s_idx
, s_ip_idx
;
3595 struct net_device
*dev
;
3596 struct inet6_dev
*idev
;
3597 struct hlist_head
*head
;
3598 struct hlist_node
*node
;
3601 s_idx
= idx
= cb
->args
[1];
3602 s_ip_idx
= ip_idx
= cb
->args
[2];
3605 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
3607 head
= &net
->dev_index_head
[h
];
3608 hlist_for_each_entry_rcu(dev
, node
, head
, index_hlist
) {
3611 if (h
> s_h
|| idx
> s_idx
)
3614 idev
= __in6_dev_get(dev
);
3618 if (in6_dump_addrs(idev
, skb
, cb
, type
,
3619 s_ip_idx
, &ip_idx
) <= 0)
3629 cb
->args
[2] = ip_idx
;
3634 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3636 enum addr_type_t type
= UNICAST_ADDR
;
3638 return inet6_dump_addr(skb
, cb
, type
);
3641 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3643 enum addr_type_t type
= MULTICAST_ADDR
;
3645 return inet6_dump_addr(skb
, cb
, type
);
3649 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3651 enum addr_type_t type
= ANYCAST_ADDR
;
3653 return inet6_dump_addr(skb
, cb
, type
);
3656 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
* nlh
,
3659 struct net
*net
= sock_net(in_skb
->sk
);
3660 struct ifaddrmsg
*ifm
;
3661 struct nlattr
*tb
[IFA_MAX
+1];
3662 struct in6_addr
*addr
= NULL
;
3663 struct net_device
*dev
= NULL
;
3664 struct inet6_ifaddr
*ifa
;
3665 struct sk_buff
*skb
;
3668 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3672 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3678 ifm
= nlmsg_data(nlh
);
3680 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3682 ifa
= ipv6_get_ifaddr(net
, addr
, dev
, 1);
3684 err
= -EADDRNOTAVAIL
;
3688 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
);
3694 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).pid
,
3695 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
3697 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3698 WARN_ON(err
== -EMSGSIZE
);
3702 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).pid
);
3709 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
3711 struct sk_buff
*skb
;
3712 struct net
*net
= dev_net(ifa
->idev
->dev
);
3715 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
3719 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
3721 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3722 WARN_ON(err
== -EMSGSIZE
);
3726 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3730 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
3733 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
3734 __s32
*array
, int bytes
)
3736 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
3738 memset(array
, 0, bytes
);
3739 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
3740 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
3741 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
3742 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
3743 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
3744 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
3745 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
3746 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
3747 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] = cnf
->rtr_solicit_interval
;
3748 array
[DEVCONF_RTR_SOLICIT_DELAY
] = cnf
->rtr_solicit_delay
;
3749 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
3750 #ifdef CONFIG_IPV6_PRIVACY
3751 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
3752 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
3753 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
3754 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
3755 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
3757 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
3758 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
3759 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
3760 #ifdef CONFIG_IPV6_ROUTER_PREF
3761 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
3762 array
[DEVCONF_RTR_PROBE_INTERVAL
] = cnf
->rtr_probe_interval
;
3763 #ifdef CONFIG_IPV6_ROUTE_INFO
3764 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
3767 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
3768 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
3769 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3770 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
3772 #ifdef CONFIG_IPV6_MROUTE
3773 array
[DEVCONF_MC_FORWARDING
] = cnf
->mc_forwarding
;
3775 array
[DEVCONF_DISABLE_IPV6
] = cnf
->disable_ipv6
;
3776 array
[DEVCONF_ACCEPT_DAD
] = cnf
->accept_dad
;
3777 array
[DEVCONF_FORCE_TLLAO
] = cnf
->force_tllao
;
3780 static inline size_t inet6_if_nlmsg_size(void)
3782 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
3783 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
3784 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
3785 + nla_total_size(4) /* IFLA_MTU */
3786 + nla_total_size(4) /* IFLA_LINK */
3787 + nla_total_size( /* IFLA_PROTINFO */
3788 nla_total_size(4) /* IFLA_INET6_FLAGS */
3789 + nla_total_size(sizeof(struct ifla_cacheinfo
))
3790 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
3791 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
3792 + nla_total_size(ICMP6_MIB_MAX
* 8) /* IFLA_INET6_ICMP6STATS */
3796 static inline void __snmp6_fill_stats(u64
*stats
, void __percpu
**mib
,
3797 int items
, int bytes
)
3800 int pad
= bytes
- sizeof(u64
) * items
;
3803 /* Use put_unaligned() because stats may not be aligned for u64. */
3804 put_unaligned(items
, &stats
[0]);
3805 for (i
= 1; i
< items
; i
++)
3806 put_unaligned(snmp_fold_field(mib
, i
), &stats
[i
]);
3808 memset(&stats
[items
], 0, pad
);
3811 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
3815 case IFLA_INET6_STATS
:
3816 __snmp6_fill_stats(stats
, (void __percpu
**)idev
->stats
.ipv6
, IPSTATS_MIB_MAX
, bytes
);
3818 case IFLA_INET6_ICMP6STATS
:
3819 __snmp6_fill_stats(stats
, (void __percpu
**)idev
->stats
.icmpv6
, ICMP6_MIB_MAX
, bytes
);
3824 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3825 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3827 struct net_device
*dev
= idev
->dev
;
3829 struct ifinfomsg
*hdr
;
3830 struct nlmsghdr
*nlh
;
3832 struct ifla_cacheinfo ci
;
3834 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*hdr
), flags
);
3838 hdr
= nlmsg_data(nlh
);
3839 hdr
->ifi_family
= AF_INET6
;
3841 hdr
->ifi_type
= dev
->type
;
3842 hdr
->ifi_index
= dev
->ifindex
;
3843 hdr
->ifi_flags
= dev_get_flags(dev
);
3844 hdr
->ifi_change
= 0;
3846 NLA_PUT_STRING(skb
, IFLA_IFNAME
, dev
->name
);
3849 NLA_PUT(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
);
3851 NLA_PUT_U32(skb
, IFLA_MTU
, dev
->mtu
);
3852 if (dev
->ifindex
!= dev
->iflink
)
3853 NLA_PUT_U32(skb
, IFLA_LINK
, dev
->iflink
);
3855 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
3856 if (protoinfo
== NULL
)
3857 goto nla_put_failure
;
3859 NLA_PUT_U32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
);
3861 ci
.max_reasm_len
= IPV6_MAXPLEN
;
3862 ci
.tstamp
= (__u32
)(TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) / HZ
* 100
3863 + TIME_DELTA(idev
->tstamp
, INITIAL_JIFFIES
) % HZ
* 100 / HZ
);
3864 ci
.reachable_time
= idev
->nd_parms
->reachable_time
;
3865 ci
.retrans_time
= idev
->nd_parms
->retrans_time
;
3866 NLA_PUT(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
);
3868 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
3870 goto nla_put_failure
;
3871 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
3873 /* XXX - MC not implemented */
3875 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
3877 goto nla_put_failure
;
3878 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
3880 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
3882 goto nla_put_failure
;
3883 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
3885 nla_nest_end(skb
, protoinfo
);
3886 return nlmsg_end(skb
, nlh
);
3889 nlmsg_cancel(skb
, nlh
);
3893 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3895 struct net
*net
= sock_net(skb
->sk
);
3898 struct net_device
*dev
;
3899 struct inet6_dev
*idev
;
3900 struct hlist_head
*head
;
3901 struct hlist_node
*node
;
3904 s_idx
= cb
->args
[1];
3907 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
3909 head
= &net
->dev_index_head
[h
];
3910 hlist_for_each_entry_rcu(dev
, node
, head
, index_hlist
) {
3913 idev
= __in6_dev_get(dev
);
3916 if (inet6_fill_ifinfo(skb
, idev
,
3917 NETLINK_CB(cb
->skb
).pid
,
3919 RTM_NEWLINK
, NLM_F_MULTI
) <= 0)
3933 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
3935 struct sk_buff
*skb
;
3936 struct net
*net
= dev_net(idev
->dev
);
3939 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
3943 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
3945 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
3946 WARN_ON(err
== -EMSGSIZE
);
3950 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3954 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
3957 static inline size_t inet6_prefix_nlmsg_size(void)
3959 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
3960 + nla_total_size(sizeof(struct in6_addr
))
3961 + nla_total_size(sizeof(struct prefix_cacheinfo
));
3964 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3965 struct prefix_info
*pinfo
, u32 pid
, u32 seq
,
3966 int event
, unsigned int flags
)
3968 struct prefixmsg
*pmsg
;
3969 struct nlmsghdr
*nlh
;
3970 struct prefix_cacheinfo ci
;
3972 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*pmsg
), flags
);
3976 pmsg
= nlmsg_data(nlh
);
3977 pmsg
->prefix_family
= AF_INET6
;
3978 pmsg
->prefix_pad1
= 0;
3979 pmsg
->prefix_pad2
= 0;
3980 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
3981 pmsg
->prefix_len
= pinfo
->prefix_len
;
3982 pmsg
->prefix_type
= pinfo
->type
;
3983 pmsg
->prefix_pad3
= 0;
3984 pmsg
->prefix_flags
= 0;
3986 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
3987 if (pinfo
->autoconf
)
3988 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
3990 NLA_PUT(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
);
3992 ci
.preferred_time
= ntohl(pinfo
->prefered
);
3993 ci
.valid_time
= ntohl(pinfo
->valid
);
3994 NLA_PUT(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
);
3996 return nlmsg_end(skb
, nlh
);
3999 nlmsg_cancel(skb
, nlh
);
4003 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
4004 struct prefix_info
*pinfo
)
4006 struct sk_buff
*skb
;
4007 struct net
*net
= dev_net(idev
->dev
);
4010 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
4014 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
4016 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
4017 WARN_ON(err
== -EMSGSIZE
);
4021 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
4025 rtnl_set_sk_err(net
, RTNLGRP_IPV6_PREFIX
, err
);
4028 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
4030 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
4035 * If the address was optimistic
4036 * we inserted the route at the start of
4037 * our DAD process, so we don't need
4040 if (!(ifp
->rt
->rt6i_node
))
4041 ip6_ins_rt(ifp
->rt
);
4042 if (ifp
->idev
->cnf
.forwarding
)
4043 addrconf_join_anycast(ifp
);
4046 if (ifp
->idev
->cnf
.forwarding
)
4047 addrconf_leave_anycast(ifp
);
4048 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
4049 dst_hold(&ifp
->rt
->u
.dst
);
4051 if (ifp
->dead
&& ip6_del_rt(ifp
->rt
))
4052 dst_free(&ifp
->rt
->u
.dst
);
4057 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
4060 if (likely(ifp
->idev
->dead
== 0))
4061 __ipv6_ifa_notify(event
, ifp
);
4062 rcu_read_unlock_bh();
4065 #ifdef CONFIG_SYSCTL
4068 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
,
4069 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4071 int *valp
= ctl
->data
;
4076 ret
= proc_dointvec(ctl
, write
, buffer
, lenp
, ppos
);
4079 ret
= addrconf_fixup_forwarding(ctl
, valp
, val
);
4085 static void dev_disable_change(struct inet6_dev
*idev
)
4087 if (!idev
|| !idev
->dev
)
4090 if (idev
->cnf
.disable_ipv6
)
4091 addrconf_notify(NULL
, NETDEV_DOWN
, idev
->dev
);
4093 addrconf_notify(NULL
, NETDEV_UP
, idev
->dev
);
4096 static void addrconf_disable_change(struct net
*net
, __s32 newf
)
4098 struct net_device
*dev
;
4099 struct inet6_dev
*idev
;
4102 for_each_netdev_rcu(net
, dev
) {
4103 idev
= __in6_dev_get(dev
);
4105 int changed
= (!idev
->cnf
.disable_ipv6
) ^ (!newf
);
4106 idev
->cnf
.disable_ipv6
= newf
;
4108 dev_disable_change(idev
);
4114 static int addrconf_disable_ipv6(struct ctl_table
*table
, int *p
, int old
)
4118 net
= (struct net
*)table
->extra2
;
4120 if (p
== &net
->ipv6
.devconf_dflt
->disable_ipv6
)
4123 if (!rtnl_trylock()) {
4124 /* Restore the original values before restarting */
4126 return restart_syscall();
4129 if (p
== &net
->ipv6
.devconf_all
->disable_ipv6
) {
4130 __s32 newf
= net
->ipv6
.devconf_all
->disable_ipv6
;
4131 net
->ipv6
.devconf_dflt
->disable_ipv6
= newf
;
4132 addrconf_disable_change(net
, newf
);
4133 } else if ((!*p
) ^ (!old
))
4134 dev_disable_change((struct inet6_dev
*)table
->extra1
);
4141 int addrconf_sysctl_disable(ctl_table
*ctl
, int write
,
4142 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4144 int *valp
= ctl
->data
;
4149 ret
= proc_dointvec(ctl
, write
, buffer
, lenp
, ppos
);
4152 ret
= addrconf_disable_ipv6(ctl
, valp
, val
);
4158 static struct addrconf_sysctl_table
4160 struct ctl_table_header
*sysctl_header
;
4161 ctl_table addrconf_vars
[DEVCONF_MAX
+1];
4163 } addrconf_sysctl __read_mostly
= {
4164 .sysctl_header
= NULL
,
4167 .procname
= "forwarding",
4168 .data
= &ipv6_devconf
.forwarding
,
4169 .maxlen
= sizeof(int),
4171 .proc_handler
= addrconf_sysctl_forward
,
4174 .procname
= "hop_limit",
4175 .data
= &ipv6_devconf
.hop_limit
,
4176 .maxlen
= sizeof(int),
4178 .proc_handler
= proc_dointvec
,
4182 .data
= &ipv6_devconf
.mtu6
,
4183 .maxlen
= sizeof(int),
4185 .proc_handler
= proc_dointvec
,
4188 .procname
= "accept_ra",
4189 .data
= &ipv6_devconf
.accept_ra
,
4190 .maxlen
= sizeof(int),
4192 .proc_handler
= proc_dointvec
,
4195 .procname
= "accept_redirects",
4196 .data
= &ipv6_devconf
.accept_redirects
,
4197 .maxlen
= sizeof(int),
4199 .proc_handler
= proc_dointvec
,
4202 .procname
= "autoconf",
4203 .data
= &ipv6_devconf
.autoconf
,
4204 .maxlen
= sizeof(int),
4206 .proc_handler
= proc_dointvec
,
4209 .procname
= "dad_transmits",
4210 .data
= &ipv6_devconf
.dad_transmits
,
4211 .maxlen
= sizeof(int),
4213 .proc_handler
= proc_dointvec
,
4216 .procname
= "router_solicitations",
4217 .data
= &ipv6_devconf
.rtr_solicits
,
4218 .maxlen
= sizeof(int),
4220 .proc_handler
= proc_dointvec
,
4223 .procname
= "router_solicitation_interval",
4224 .data
= &ipv6_devconf
.rtr_solicit_interval
,
4225 .maxlen
= sizeof(int),
4227 .proc_handler
= proc_dointvec_jiffies
,
4230 .procname
= "router_solicitation_delay",
4231 .data
= &ipv6_devconf
.rtr_solicit_delay
,
4232 .maxlen
= sizeof(int),
4234 .proc_handler
= proc_dointvec_jiffies
,
4237 .procname
= "force_mld_version",
4238 .data
= &ipv6_devconf
.force_mld_version
,
4239 .maxlen
= sizeof(int),
4241 .proc_handler
= proc_dointvec
,
4243 #ifdef CONFIG_IPV6_PRIVACY
4245 .procname
= "use_tempaddr",
4246 .data
= &ipv6_devconf
.use_tempaddr
,
4247 .maxlen
= sizeof(int),
4249 .proc_handler
= proc_dointvec
,
4252 .procname
= "temp_valid_lft",
4253 .data
= &ipv6_devconf
.temp_valid_lft
,
4254 .maxlen
= sizeof(int),
4256 .proc_handler
= proc_dointvec
,
4259 .procname
= "temp_prefered_lft",
4260 .data
= &ipv6_devconf
.temp_prefered_lft
,
4261 .maxlen
= sizeof(int),
4263 .proc_handler
= proc_dointvec
,
4266 .procname
= "regen_max_retry",
4267 .data
= &ipv6_devconf
.regen_max_retry
,
4268 .maxlen
= sizeof(int),
4270 .proc_handler
= proc_dointvec
,
4273 .procname
= "max_desync_factor",
4274 .data
= &ipv6_devconf
.max_desync_factor
,
4275 .maxlen
= sizeof(int),
4277 .proc_handler
= proc_dointvec
,
4281 .procname
= "max_addresses",
4282 .data
= &ipv6_devconf
.max_addresses
,
4283 .maxlen
= sizeof(int),
4285 .proc_handler
= proc_dointvec
,
4288 .procname
= "accept_ra_defrtr",
4289 .data
= &ipv6_devconf
.accept_ra_defrtr
,
4290 .maxlen
= sizeof(int),
4292 .proc_handler
= proc_dointvec
,
4295 .procname
= "accept_ra_pinfo",
4296 .data
= &ipv6_devconf
.accept_ra_pinfo
,
4297 .maxlen
= sizeof(int),
4299 .proc_handler
= proc_dointvec
,
4301 #ifdef CONFIG_IPV6_ROUTER_PREF
4303 .procname
= "accept_ra_rtr_pref",
4304 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
4305 .maxlen
= sizeof(int),
4307 .proc_handler
= proc_dointvec
,
4310 .procname
= "router_probe_interval",
4311 .data
= &ipv6_devconf
.rtr_probe_interval
,
4312 .maxlen
= sizeof(int),
4314 .proc_handler
= proc_dointvec_jiffies
,
4316 #ifdef CONFIG_IPV6_ROUTE_INFO
4318 .procname
= "accept_ra_rt_info_max_plen",
4319 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
4320 .maxlen
= sizeof(int),
4322 .proc_handler
= proc_dointvec
,
4327 .procname
= "proxy_ndp",
4328 .data
= &ipv6_devconf
.proxy_ndp
,
4329 .maxlen
= sizeof(int),
4331 .proc_handler
= proc_dointvec
,
4334 .procname
= "accept_source_route",
4335 .data
= &ipv6_devconf
.accept_source_route
,
4336 .maxlen
= sizeof(int),
4338 .proc_handler
= proc_dointvec
,
4340 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4342 .procname
= "optimistic_dad",
4343 .data
= &ipv6_devconf
.optimistic_dad
,
4344 .maxlen
= sizeof(int),
4346 .proc_handler
= proc_dointvec
,
4350 #ifdef CONFIG_IPV6_MROUTE
4352 .procname
= "mc_forwarding",
4353 .data
= &ipv6_devconf
.mc_forwarding
,
4354 .maxlen
= sizeof(int),
4356 .proc_handler
= proc_dointvec
,
4360 .procname
= "disable_ipv6",
4361 .data
= &ipv6_devconf
.disable_ipv6
,
4362 .maxlen
= sizeof(int),
4364 .proc_handler
= addrconf_sysctl_disable
,
4367 .procname
= "accept_dad",
4368 .data
= &ipv6_devconf
.accept_dad
,
4369 .maxlen
= sizeof(int),
4371 .proc_handler
= proc_dointvec
,
4374 .procname
= "force_tllao",
4375 .data
= &ipv6_devconf
.force_tllao
,
4376 .maxlen
= sizeof(int),
4378 .proc_handler
= proc_dointvec
4386 static int __addrconf_sysctl_register(struct net
*net
, char *dev_name
,
4387 struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
4390 struct addrconf_sysctl_table
*t
;
4392 #define ADDRCONF_CTL_PATH_DEV 3
4394 struct ctl_path addrconf_ctl_path
[] = {
4395 { .procname
= "net", },
4396 { .procname
= "ipv6", },
4397 { .procname
= "conf", },
4398 { /* to be set */ },
4403 t
= kmemdup(&addrconf_sysctl
, sizeof(*t
), GFP_KERNEL
);
4407 for (i
= 0; t
->addrconf_vars
[i
].data
; i
++) {
4408 t
->addrconf_vars
[i
].data
+= (char *)p
- (char *)&ipv6_devconf
;
4409 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
4410 t
->addrconf_vars
[i
].extra2
= net
;
4414 * Make a copy of dev_name, because '.procname' is regarded as const
4415 * by sysctl and we wouldn't want anyone to change it under our feet
4416 * (see SIOCSIFNAME).
4418 t
->dev_name
= kstrdup(dev_name
, GFP_KERNEL
);
4422 addrconf_ctl_path
[ADDRCONF_CTL_PATH_DEV
].procname
= t
->dev_name
;
4424 t
->sysctl_header
= register_net_sysctl_table(net
, addrconf_ctl_path
,
4426 if (t
->sysctl_header
== NULL
)
4440 static void __addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
4442 struct addrconf_sysctl_table
*t
;
4444 if (p
->sysctl
== NULL
)
4449 unregister_sysctl_table(t
->sysctl_header
);
4454 static void addrconf_sysctl_register(struct inet6_dev
*idev
)
4456 neigh_sysctl_register(idev
->dev
, idev
->nd_parms
, "ipv6",
4457 &ndisc_ifinfo_sysctl_change
);
4458 __addrconf_sysctl_register(dev_net(idev
->dev
), idev
->dev
->name
,
4462 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
4464 __addrconf_sysctl_unregister(&idev
->cnf
);
4465 neigh_sysctl_unregister(idev
->nd_parms
);
4471 static int __net_init
addrconf_init_net(struct net
*net
)
4474 struct ipv6_devconf
*all
, *dflt
;
4477 all
= &ipv6_devconf
;
4478 dflt
= &ipv6_devconf_dflt
;
4480 if (!net_eq(net
, &init_net
)) {
4481 all
= kmemdup(all
, sizeof(ipv6_devconf
), GFP_KERNEL
);
4485 dflt
= kmemdup(dflt
, sizeof(ipv6_devconf_dflt
), GFP_KERNEL
);
4487 goto err_alloc_dflt
;
4489 /* these will be inherited by all namespaces */
4490 dflt
->autoconf
= ipv6_defaults
.autoconf
;
4491 dflt
->disable_ipv6
= ipv6_defaults
.disable_ipv6
;
4494 net
->ipv6
.devconf_all
= all
;
4495 net
->ipv6
.devconf_dflt
= dflt
;
4497 #ifdef CONFIG_SYSCTL
4498 err
= __addrconf_sysctl_register(net
, "all", NULL
, all
);
4502 err
= __addrconf_sysctl_register(net
, "default", NULL
, dflt
);
4508 #ifdef CONFIG_SYSCTL
4510 __addrconf_sysctl_unregister(all
);
4520 static void __net_exit
addrconf_exit_net(struct net
*net
)
4522 #ifdef CONFIG_SYSCTL
4523 __addrconf_sysctl_unregister(net
->ipv6
.devconf_dflt
);
4524 __addrconf_sysctl_unregister(net
->ipv6
.devconf_all
);
4526 if (!net_eq(net
, &init_net
)) {
4527 kfree(net
->ipv6
.devconf_dflt
);
4528 kfree(net
->ipv6
.devconf_all
);
4532 static struct pernet_operations addrconf_ops
= {
4533 .init
= addrconf_init_net
,
4534 .exit
= addrconf_exit_net
,
4541 int register_inet6addr_notifier(struct notifier_block
*nb
)
4543 return atomic_notifier_chain_register(&inet6addr_chain
, nb
);
4545 EXPORT_SYMBOL(register_inet6addr_notifier
);
4547 int unregister_inet6addr_notifier(struct notifier_block
*nb
)
4549 return atomic_notifier_chain_unregister(&inet6addr_chain
, nb
);
4551 EXPORT_SYMBOL(unregister_inet6addr_notifier
);
4554 * Init / cleanup code
4557 int __init
addrconf_init(void)
4561 err
= ipv6_addr_label_init();
4563 printk(KERN_CRIT
"IPv6 Addrconf:"
4564 " cannot initialize default policy table: %d.\n", err
);
4568 register_pernet_subsys(&addrconf_ops
);
4570 /* The addrconf netdev notifier requires that loopback_dev
4571 * has it's ipv6 private information allocated and setup
4572 * before it can bring up and give link-local addresses
4573 * to other devices which are up.
4575 * Unfortunately, loopback_dev is not necessarily the first
4576 * entry in the global dev_base list of net devices. In fact,
4577 * it is likely to be the very last entry on that list.
4578 * So this causes the notifier registry below to try and
4579 * give link-local addresses to all devices besides loopback_dev
4580 * first, then loopback_dev, which cases all the non-loopback_dev
4581 * devices to fail to get a link-local address.
4583 * So, as a temporary fix, allocate the ipv6 structure for
4584 * loopback_dev first by hand.
4585 * Longer term, all of the dependencies ipv6 has upon the loopback
4586 * device and it being up should be removed.
4589 if (!ipv6_add_dev(init_net
.loopback_dev
))
4595 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
4596 INIT_HLIST_HEAD(&inet6_addr_lst
[i
]);
4598 register_netdevice_notifier(&ipv6_dev_notf
);
4602 err
= __rtnl_register(PF_INET6
, RTM_GETLINK
, NULL
, inet6_dump_ifinfo
);
4606 /* Only the first call to __rtnl_register can fail */
4607 __rtnl_register(PF_INET6
, RTM_NEWADDR
, inet6_rtm_newaddr
, NULL
);
4608 __rtnl_register(PF_INET6
, RTM_DELADDR
, inet6_rtm_deladdr
, NULL
);
4609 __rtnl_register(PF_INET6
, RTM_GETADDR
, inet6_rtm_getaddr
, inet6_dump_ifaddr
);
4610 __rtnl_register(PF_INET6
, RTM_GETMULTICAST
, NULL
, inet6_dump_ifmcaddr
);
4611 __rtnl_register(PF_INET6
, RTM_GETANYCAST
, NULL
, inet6_dump_ifacaddr
);
4613 ipv6_addr_label_rtnl_register();
4617 unregister_netdevice_notifier(&ipv6_dev_notf
);
4619 unregister_pernet_subsys(&addrconf_ops
);
4624 void addrconf_cleanup(void)
4626 struct net_device
*dev
;
4629 unregister_netdevice_notifier(&ipv6_dev_notf
);
4630 unregister_pernet_subsys(&addrconf_ops
);
4634 /* clean dev list */
4635 for_each_netdev(&init_net
, dev
) {
4636 if (__in6_dev_get(dev
) == NULL
)
4638 addrconf_ifdown(dev
, 1);
4640 addrconf_ifdown(init_net
.loopback_dev
, 2);
4645 spin_lock_bh(&addrconf_hash_lock
);
4646 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
4647 WARN_ON(!hlist_empty(&inet6_addr_lst
[i
]));
4648 spin_unlock_bh(&addrconf_hash_lock
);
4650 del_timer(&addr_chk_timer
);