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
102 static inline u32
cstamp_delta(unsigned long cstamp
)
104 return (cstamp
- INITIAL_JIFFIES
) * 100UL / HZ
;
107 #define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ/50 : 1)
108 #define ADDRCONF_TIMER_FUZZ (HZ / 4)
109 #define ADDRCONF_TIMER_FUZZ_MAX (HZ)
112 static void addrconf_sysctl_register(struct inet6_dev
*idev
);
113 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
);
115 static inline void addrconf_sysctl_register(struct inet6_dev
*idev
)
119 static inline void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
124 #ifdef CONFIG_IPV6_PRIVACY
125 static int __ipv6_regen_rndid(struct inet6_dev
*idev
);
126 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
127 static void ipv6_regen_rndid(unsigned long data
);
130 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
);
131 static int ipv6_count_addresses(struct inet6_dev
*idev
);
134 * Configured unicast address hash table
136 static struct hlist_head inet6_addr_lst
[IN6_ADDR_HSIZE
];
137 static DEFINE_SPINLOCK(addrconf_hash_lock
);
139 static void addrconf_verify(unsigned long);
141 static DEFINE_TIMER(addr_chk_timer
, addrconf_verify
, 0, 0);
142 static DEFINE_SPINLOCK(addrconf_verify_lock
);
144 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
145 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
147 static void addrconf_type_change(struct net_device
*dev
,
148 unsigned long event
);
149 static int addrconf_ifdown(struct net_device
*dev
, int how
);
151 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
);
152 static void addrconf_dad_timer(unsigned long data
);
153 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
);
154 static void addrconf_dad_run(struct inet6_dev
*idev
);
155 static void addrconf_rs_timer(unsigned long data
);
156 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
157 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
159 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
160 struct prefix_info
*pinfo
);
161 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
162 struct net_device
*dev
);
164 static ATOMIC_NOTIFIER_HEAD(inet6addr_chain
);
166 static struct ipv6_devconf ipv6_devconf __read_mostly
= {
168 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
169 .mtu6
= IPV6_MIN_MTU
,
171 .accept_redirects
= 1,
173 .force_mld_version
= 0,
175 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
176 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
177 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
178 #ifdef CONFIG_IPV6_PRIVACY
180 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
181 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
182 .regen_max_retry
= REGEN_MAX_RETRY
,
183 .max_desync_factor
= MAX_DESYNC_FACTOR
,
185 .max_addresses
= IPV6_MAX_ADDRESSES
,
186 .accept_ra_defrtr
= 1,
187 .accept_ra_pinfo
= 1,
188 #ifdef CONFIG_IPV6_ROUTER_PREF
189 .accept_ra_rtr_pref
= 1,
190 .rtr_probe_interval
= 60 * HZ
,
191 #ifdef CONFIG_IPV6_ROUTE_INFO
192 .accept_ra_rt_info_max_plen
= 0,
196 .accept_source_route
= 0, /* we do not accept RH0 by default. */
201 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly
= {
203 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
204 .mtu6
= IPV6_MIN_MTU
,
206 .accept_redirects
= 1,
209 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
210 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
211 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
212 #ifdef CONFIG_IPV6_PRIVACY
214 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
215 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
216 .regen_max_retry
= REGEN_MAX_RETRY
,
217 .max_desync_factor
= MAX_DESYNC_FACTOR
,
219 .max_addresses
= IPV6_MAX_ADDRESSES
,
220 .accept_ra_defrtr
= 1,
221 .accept_ra_pinfo
= 1,
222 #ifdef CONFIG_IPV6_ROUTER_PREF
223 .accept_ra_rtr_pref
= 1,
224 .rtr_probe_interval
= 60 * HZ
,
225 #ifdef CONFIG_IPV6_ROUTE_INFO
226 .accept_ra_rt_info_max_plen
= 0,
230 .accept_source_route
= 0, /* we do not accept RH0 by default. */
235 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
236 const struct in6_addr in6addr_any
= IN6ADDR_ANY_INIT
;
237 const struct in6_addr in6addr_loopback
= IN6ADDR_LOOPBACK_INIT
;
238 const struct in6_addr in6addr_linklocal_allnodes
= IN6ADDR_LINKLOCAL_ALLNODES_INIT
;
239 const struct in6_addr in6addr_linklocal_allrouters
= IN6ADDR_LINKLOCAL_ALLROUTERS_INIT
;
241 /* Check if a valid qdisc is available */
242 static inline bool addrconf_qdisc_ok(const struct net_device
*dev
)
244 return !qdisc_tx_is_noop(dev
);
247 /* Check if a route is valid prefix route */
248 static inline int addrconf_is_prefix_route(const struct rt6_info
*rt
)
250 return (rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0;
253 static void addrconf_del_timer(struct inet6_ifaddr
*ifp
)
255 if (del_timer(&ifp
->timer
))
259 enum addrconf_timer_t
{
265 static void addrconf_mod_timer(struct inet6_ifaddr
*ifp
,
266 enum addrconf_timer_t what
,
269 if (!del_timer(&ifp
->timer
))
274 ifp
->timer
.function
= addrconf_dad_timer
;
277 ifp
->timer
.function
= addrconf_rs_timer
;
282 ifp
->timer
.expires
= jiffies
+ when
;
283 add_timer(&ifp
->timer
);
286 static int snmp6_alloc_dev(struct inet6_dev
*idev
)
288 if (snmp_mib_init((void __percpu
**)idev
->stats
.ipv6
,
289 sizeof(struct ipstats_mib
),
290 __alignof__(struct ipstats_mib
)) < 0)
292 idev
->stats
.icmpv6dev
= kzalloc(sizeof(struct icmpv6_mib_device
),
294 if (!idev
->stats
.icmpv6dev
)
296 idev
->stats
.icmpv6msgdev
= kzalloc(sizeof(struct icmpv6msg_mib_device
),
298 if (!idev
->stats
.icmpv6msgdev
)
304 kfree(idev
->stats
.icmpv6dev
);
306 snmp_mib_free((void __percpu
**)idev
->stats
.ipv6
);
311 static void snmp6_free_dev(struct inet6_dev
*idev
)
313 kfree(idev
->stats
.icmpv6msgdev
);
314 kfree(idev
->stats
.icmpv6dev
);
315 snmp_mib_free((void __percpu
**)idev
->stats
.ipv6
);
318 /* Nobody refers to this device, we may destroy it. */
320 void in6_dev_finish_destroy(struct inet6_dev
*idev
)
322 struct net_device
*dev
= idev
->dev
;
324 WARN_ON(!list_empty(&idev
->addr_list
));
325 WARN_ON(idev
->mc_list
!= NULL
);
327 #ifdef NET_REFCNT_DEBUG
328 printk(KERN_DEBUG
"in6_dev_finish_destroy: %s\n", dev
? dev
->name
: "NIL");
332 pr_warning("Freeing alive inet6 device %p\n", idev
);
335 snmp6_free_dev(idev
);
336 kfree_rcu(idev
, rcu
);
339 EXPORT_SYMBOL(in6_dev_finish_destroy
);
341 static struct inet6_dev
* ipv6_add_dev(struct net_device
*dev
)
343 struct inet6_dev
*ndev
;
347 if (dev
->mtu
< IPV6_MIN_MTU
)
350 ndev
= kzalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
355 rwlock_init(&ndev
->lock
);
357 INIT_LIST_HEAD(&ndev
->addr_list
);
359 memcpy(&ndev
->cnf
, dev_net(dev
)->ipv6
.devconf_dflt
, sizeof(ndev
->cnf
));
360 ndev
->cnf
.mtu6
= dev
->mtu
;
361 ndev
->cnf
.sysctl
= NULL
;
362 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
363 if (ndev
->nd_parms
== NULL
) {
367 if (ndev
->cnf
.forwarding
)
368 dev_disable_lro(dev
);
369 /* We refer to the device */
372 if (snmp6_alloc_dev(ndev
) < 0) {
374 "%s(): cannot allocate memory for statistics; dev=%s.\n",
375 __func__
, dev
->name
));
376 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
378 in6_dev_finish_destroy(ndev
);
382 if (snmp6_register_dev(ndev
) < 0) {
384 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
385 __func__
, dev
->name
));
386 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
388 in6_dev_finish_destroy(ndev
);
392 /* One reference from device. We must do this before
393 * we invoke __ipv6_regen_rndid().
397 if (dev
->flags
& (IFF_NOARP
| IFF_LOOPBACK
))
398 ndev
->cnf
.accept_dad
= -1;
400 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
401 if (dev
->type
== ARPHRD_SIT
&& (dev
->priv_flags
& IFF_ISATAP
)) {
403 "%s: Disabled Multicast RS\n",
405 ndev
->cnf
.rtr_solicits
= 0;
409 #ifdef CONFIG_IPV6_PRIVACY
410 INIT_LIST_HEAD(&ndev
->tempaddr_list
);
411 setup_timer(&ndev
->regen_timer
, ipv6_regen_rndid
, (unsigned long)ndev
);
412 if ((dev
->flags
&IFF_LOOPBACK
) ||
413 dev
->type
== ARPHRD_TUNNEL
||
414 dev
->type
== ARPHRD_TUNNEL6
||
415 dev
->type
== ARPHRD_SIT
||
416 dev
->type
== ARPHRD_NONE
) {
417 ndev
->cnf
.use_tempaddr
= -1;
420 ipv6_regen_rndid((unsigned long) ndev
);
424 if (netif_running(dev
) && addrconf_qdisc_ok(dev
))
425 ndev
->if_flags
|= IF_READY
;
427 ipv6_mc_init_dev(ndev
);
428 ndev
->tstamp
= jiffies
;
429 addrconf_sysctl_register(ndev
);
430 /* protected by rtnl_lock */
431 rcu_assign_pointer(dev
->ip6_ptr
, ndev
);
433 /* Join all-node multicast group */
434 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allnodes
);
439 static struct inet6_dev
* ipv6_find_idev(struct net_device
*dev
)
441 struct inet6_dev
*idev
;
445 idev
= __in6_dev_get(dev
);
447 idev
= ipv6_add_dev(dev
);
452 if (dev
->flags
&IFF_UP
)
458 static void dev_forward_change(struct inet6_dev
*idev
)
460 struct net_device
*dev
;
461 struct inet6_ifaddr
*ifa
;
466 if (idev
->cnf
.forwarding
)
467 dev_disable_lro(dev
);
468 if (dev
&& (dev
->flags
& IFF_MULTICAST
)) {
469 if (idev
->cnf
.forwarding
)
470 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
472 ipv6_dev_mc_dec(dev
, &in6addr_linklocal_allrouters
);
475 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
476 if (ifa
->flags
&IFA_F_TENTATIVE
)
478 if (idev
->cnf
.forwarding
)
479 addrconf_join_anycast(ifa
);
481 addrconf_leave_anycast(ifa
);
486 static void addrconf_forward_change(struct net
*net
, __s32 newf
)
488 struct net_device
*dev
;
489 struct inet6_dev
*idev
;
492 for_each_netdev_rcu(net
, dev
) {
493 idev
= __in6_dev_get(dev
);
495 int changed
= (!idev
->cnf
.forwarding
) ^ (!newf
);
496 idev
->cnf
.forwarding
= newf
;
498 dev_forward_change(idev
);
504 static int addrconf_fixup_forwarding(struct ctl_table
*table
, int *p
, int old
)
508 net
= (struct net
*)table
->extra2
;
509 if (p
== &net
->ipv6
.devconf_dflt
->forwarding
)
512 if (!rtnl_trylock()) {
513 /* Restore the original values before restarting */
515 return restart_syscall();
518 if (p
== &net
->ipv6
.devconf_all
->forwarding
) {
519 __s32 newf
= net
->ipv6
.devconf_all
->forwarding
;
520 net
->ipv6
.devconf_dflt
->forwarding
= newf
;
521 addrconf_forward_change(net
, newf
);
522 } else if ((!*p
) ^ (!old
))
523 dev_forward_change((struct inet6_dev
*)table
->extra1
);
527 rt6_purge_dflt_routers(net
);
532 /* Nobody refers to this ifaddr, destroy it */
533 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
535 WARN_ON(!hlist_unhashed(&ifp
->addr_lst
));
537 #ifdef NET_REFCNT_DEBUG
538 printk(KERN_DEBUG
"inet6_ifa_finish_destroy\n");
541 in6_dev_put(ifp
->idev
);
543 if (del_timer(&ifp
->timer
))
544 pr_notice("Timer is still running, when freeing ifa=%p\n", ifp
);
546 if (ifp
->state
!= INET6_IFADDR_STATE_DEAD
) {
547 pr_warning("Freeing alive inet6 address %p\n", ifp
);
550 dst_release(&ifp
->rt
->dst
);
556 ipv6_link_dev_addr(struct inet6_dev
*idev
, struct inet6_ifaddr
*ifp
)
559 int ifp_scope
= ipv6_addr_src_scope(&ifp
->addr
);
562 * Each device address list is sorted in order of scope -
563 * global before linklocal.
565 list_for_each(p
, &idev
->addr_list
) {
566 struct inet6_ifaddr
*ifa
567 = list_entry(p
, struct inet6_ifaddr
, if_list
);
568 if (ifp_scope
>= ipv6_addr_src_scope(&ifa
->addr
))
572 list_add_tail(&ifp
->if_list
, p
);
575 static u32
ipv6_addr_hash(const struct in6_addr
*addr
)
578 * We perform the hash function over the last 64 bits of the address
579 * This will include the IEEE address token on links that support it.
581 return jhash_2words((__force u32
)addr
->s6_addr32
[2],
582 (__force u32
)addr
->s6_addr32
[3], 0)
583 & (IN6_ADDR_HSIZE
- 1);
586 /* On success it returns ifp with increased reference count */
588 static struct inet6_ifaddr
*
589 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
, int pfxlen
,
590 int scope
, u32 flags
)
592 struct inet6_ifaddr
*ifa
= NULL
;
596 int addr_type
= ipv6_addr_type(addr
);
598 if (addr_type
== IPV6_ADDR_ANY
||
599 addr_type
& IPV6_ADDR_MULTICAST
||
600 (!(idev
->dev
->flags
& IFF_LOOPBACK
) &&
601 addr_type
& IPV6_ADDR_LOOPBACK
))
602 return ERR_PTR(-EADDRNOTAVAIL
);
606 err
= -ENODEV
; /*XXX*/
610 if (idev
->cnf
.disable_ipv6
) {
615 spin_lock(&addrconf_hash_lock
);
617 /* Ignore adding duplicate addresses on an interface */
618 if (ipv6_chk_same_addr(dev_net(idev
->dev
), addr
, idev
->dev
)) {
619 ADBG(("ipv6_add_addr: already assigned\n"));
624 ifa
= kzalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
627 ADBG(("ipv6_add_addr: malloc failed\n"));
632 rt
= addrconf_dst_alloc(idev
, addr
, 0);
638 ipv6_addr_copy(&ifa
->addr
, addr
);
640 spin_lock_init(&ifa
->lock
);
641 spin_lock_init(&ifa
->state_lock
);
642 init_timer(&ifa
->timer
);
643 INIT_HLIST_NODE(&ifa
->addr_lst
);
644 ifa
->timer
.data
= (unsigned long) ifa
;
646 ifa
->prefix_len
= pfxlen
;
647 ifa
->flags
= flags
| IFA_F_TENTATIVE
;
648 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
653 * part one of RFC 4429, section 3.3
654 * We should not configure an address as
655 * optimistic if we do not yet know the link
656 * layer address of our nexhop router
659 if (dst_get_neighbour(&rt
->dst
) == NULL
)
660 ifa
->flags
&= ~IFA_F_OPTIMISTIC
;
667 /* Add to big hash table */
668 hash
= ipv6_addr_hash(addr
);
670 hlist_add_head_rcu(&ifa
->addr_lst
, &inet6_addr_lst
[hash
]);
671 spin_unlock(&addrconf_hash_lock
);
673 write_lock(&idev
->lock
);
674 /* Add to inet6_dev unicast addr list. */
675 ipv6_link_dev_addr(idev
, ifa
);
677 #ifdef CONFIG_IPV6_PRIVACY
678 if (ifa
->flags
&IFA_F_TEMPORARY
) {
679 list_add(&ifa
->tmp_list
, &idev
->tempaddr_list
);
685 write_unlock(&idev
->lock
);
687 rcu_read_unlock_bh();
689 if (likely(err
== 0))
690 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_UP
, ifa
);
698 spin_unlock(&addrconf_hash_lock
);
702 /* This function wants to get referenced ifp and releases it before return */
704 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
706 struct inet6_ifaddr
*ifa
, *ifn
;
707 struct inet6_dev
*idev
= ifp
->idev
;
709 int deleted
= 0, onlink
= 0;
710 unsigned long expires
= jiffies
;
712 spin_lock_bh(&ifp
->state_lock
);
714 ifp
->state
= INET6_IFADDR_STATE_DEAD
;
715 spin_unlock_bh(&ifp
->state_lock
);
717 if (state
== INET6_IFADDR_STATE_DEAD
)
720 spin_lock_bh(&addrconf_hash_lock
);
721 hlist_del_init_rcu(&ifp
->addr_lst
);
722 spin_unlock_bh(&addrconf_hash_lock
);
724 write_lock_bh(&idev
->lock
);
725 #ifdef CONFIG_IPV6_PRIVACY
726 if (ifp
->flags
&IFA_F_TEMPORARY
) {
727 list_del(&ifp
->tmp_list
);
729 in6_ifa_put(ifp
->ifpub
);
736 list_for_each_entry_safe(ifa
, ifn
, &idev
->addr_list
, if_list
) {
738 list_del_init(&ifp
->if_list
);
741 if (!(ifp
->flags
& IFA_F_PERMANENT
) || onlink
> 0)
745 } else if (ifp
->flags
& IFA_F_PERMANENT
) {
746 if (ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
748 if (ifa
->flags
& IFA_F_PERMANENT
) {
753 unsigned long lifetime
;
758 spin_lock(&ifa
->lock
);
760 lifetime
= addrconf_timeout_fixup(ifa
->valid_lft
, HZ
);
762 * Note: Because this address is
763 * not permanent, lifetime <
764 * LONG_MAX / HZ here.
766 if (time_before(expires
,
767 ifa
->tstamp
+ lifetime
* HZ
))
768 expires
= ifa
->tstamp
+ lifetime
* HZ
;
769 spin_unlock(&ifa
->lock
);
774 write_unlock_bh(&idev
->lock
);
776 addrconf_del_timer(ifp
);
778 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
780 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifp
);
783 * Purge or update corresponding prefix
785 * 1) we don't purge prefix here if address was not permanent.
786 * prefix is managed by its own lifetime.
787 * 2) if there're no addresses, delete prefix.
788 * 3) if there're still other permanent address(es),
789 * corresponding prefix is still permanent.
790 * 4) otherwise, update prefix lifetime to the
791 * longest valid lifetime among the corresponding
792 * addresses on the device.
793 * Note: subsequent RA will update lifetime.
797 if ((ifp
->flags
& IFA_F_PERMANENT
) && onlink
< 1) {
798 struct in6_addr prefix
;
800 struct net
*net
= dev_net(ifp
->idev
->dev
);
801 ipv6_addr_prefix(&prefix
, &ifp
->addr
, ifp
->prefix_len
);
802 rt
= rt6_lookup(net
, &prefix
, NULL
, ifp
->idev
->dev
->ifindex
, 1);
804 if (rt
&& addrconf_is_prefix_route(rt
)) {
808 } else if (!(rt
->rt6i_flags
& RTF_EXPIRES
)) {
809 rt
->rt6i_expires
= expires
;
810 rt
->rt6i_flags
|= RTF_EXPIRES
;
813 dst_release(&rt
->dst
);
816 /* clean up prefsrc entries */
817 rt6_remove_prefsrc(ifp
);
822 #ifdef CONFIG_IPV6_PRIVACY
823 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
825 struct inet6_dev
*idev
= ifp
->idev
;
826 struct in6_addr addr
, *tmpaddr
;
827 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_cstamp
, tmp_tstamp
, age
;
828 unsigned long regen_advance
;
834 write_lock(&idev
->lock
);
836 spin_lock_bh(&ift
->lock
);
837 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
838 spin_unlock_bh(&ift
->lock
);
845 if (idev
->cnf
.use_tempaddr
<= 0) {
846 write_unlock(&idev
->lock
);
848 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
853 spin_lock_bh(&ifp
->lock
);
854 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
855 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
856 spin_unlock_bh(&ifp
->lock
);
857 write_unlock(&idev
->lock
);
859 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
865 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
866 if (__ipv6_try_regen_rndid(idev
, tmpaddr
) < 0) {
867 spin_unlock_bh(&ifp
->lock
);
868 write_unlock(&idev
->lock
);
870 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
876 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
877 age
= (jiffies
- ifp
->tstamp
) / HZ
;
878 tmp_valid_lft
= min_t(__u32
,
880 idev
->cnf
.temp_valid_lft
+ age
);
881 tmp_prefered_lft
= min_t(__u32
,
883 idev
->cnf
.temp_prefered_lft
+ age
-
884 idev
->cnf
.max_desync_factor
);
885 tmp_plen
= ifp
->prefix_len
;
886 max_addresses
= idev
->cnf
.max_addresses
;
887 tmp_cstamp
= ifp
->cstamp
;
888 tmp_tstamp
= ifp
->tstamp
;
889 spin_unlock_bh(&ifp
->lock
);
891 regen_advance
= idev
->cnf
.regen_max_retry
*
892 idev
->cnf
.dad_transmits
*
893 idev
->nd_parms
->retrans_time
/ HZ
;
894 write_unlock(&idev
->lock
);
896 /* A temporary address is created only if this calculated Preferred
897 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
898 * an implementation must not create a temporary address with a zero
899 * Preferred Lifetime.
901 if (tmp_prefered_lft
<= regen_advance
) {
908 addr_flags
= IFA_F_TEMPORARY
;
909 /* set in addrconf_prefix_rcv() */
910 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
911 addr_flags
|= IFA_F_OPTIMISTIC
;
913 ift
= !max_addresses
||
914 ipv6_count_addresses(idev
) < max_addresses
?
915 ipv6_add_addr(idev
, &addr
, tmp_plen
,
916 ipv6_addr_type(&addr
)&IPV6_ADDR_SCOPE_MASK
,
918 if (!ift
|| IS_ERR(ift
)) {
922 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
924 write_lock(&idev
->lock
);
928 spin_lock_bh(&ift
->lock
);
930 ift
->valid_lft
= tmp_valid_lft
;
931 ift
->prefered_lft
= tmp_prefered_lft
;
932 ift
->cstamp
= tmp_cstamp
;
933 ift
->tstamp
= tmp_tstamp
;
934 spin_unlock_bh(&ift
->lock
);
936 addrconf_dad_start(ift
, 0);
945 * Choose an appropriate source address (RFC3484)
948 IPV6_SADDR_RULE_INIT
= 0,
949 IPV6_SADDR_RULE_LOCAL
,
950 IPV6_SADDR_RULE_SCOPE
,
951 IPV6_SADDR_RULE_PREFERRED
,
952 #ifdef CONFIG_IPV6_MIP6
956 IPV6_SADDR_RULE_LABEL
,
957 #ifdef CONFIG_IPV6_PRIVACY
958 IPV6_SADDR_RULE_PRIVACY
,
960 IPV6_SADDR_RULE_ORCHID
,
961 IPV6_SADDR_RULE_PREFIX
,
965 struct ipv6_saddr_score
{
968 struct inet6_ifaddr
*ifa
;
969 DECLARE_BITMAP(scorebits
, IPV6_SADDR_RULE_MAX
);
974 struct ipv6_saddr_dst
{
975 const struct in6_addr
*addr
;
982 static inline int ipv6_saddr_preferred(int type
)
984 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|IPV6_ADDR_LOOPBACK
))
989 static int ipv6_get_saddr_eval(struct net
*net
,
990 struct ipv6_saddr_score
*score
,
991 struct ipv6_saddr_dst
*dst
,
996 if (i
<= score
->rule
) {
998 case IPV6_SADDR_RULE_SCOPE
:
999 ret
= score
->scopedist
;
1001 case IPV6_SADDR_RULE_PREFIX
:
1002 ret
= score
->matchlen
;
1005 ret
= !!test_bit(i
, score
->scorebits
);
1011 case IPV6_SADDR_RULE_INIT
:
1012 /* Rule 0: remember if hiscore is not ready yet */
1015 case IPV6_SADDR_RULE_LOCAL
:
1016 /* Rule 1: Prefer same address */
1017 ret
= ipv6_addr_equal(&score
->ifa
->addr
, dst
->addr
);
1019 case IPV6_SADDR_RULE_SCOPE
:
1020 /* Rule 2: Prefer appropriate scope
1025 * ---+--+-+---> scope
1027 * | d is scope of the destination.
1029 * | \ <- smaller scope is better if
1030 * B-15 | \ if scope is enough for destinaion.
1031 * | ret = B - scope (-1 <= scope >= d <= 15).
1033 * |/ <- greater is better
1034 * -C / if scope is not enough for destination.
1035 * /| ret = scope - C (-1 <= d < scope <= 15).
1037 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1038 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1039 * Assume B = 0 and we get C > 29.
1041 ret
= __ipv6_addr_src_scope(score
->addr_type
);
1042 if (ret
>= dst
->scope
)
1045 ret
-= 128; /* 30 is enough */
1046 score
->scopedist
= ret
;
1048 case IPV6_SADDR_RULE_PREFERRED
:
1049 /* Rule 3: Avoid deprecated and optimistic addresses */
1050 ret
= ipv6_saddr_preferred(score
->addr_type
) ||
1051 !(score
->ifa
->flags
& (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
));
1053 #ifdef CONFIG_IPV6_MIP6
1054 case IPV6_SADDR_RULE_HOA
:
1056 /* Rule 4: Prefer home address */
1057 int prefhome
= !(dst
->prefs
& IPV6_PREFER_SRC_COA
);
1058 ret
= !(score
->ifa
->flags
& IFA_F_HOMEADDRESS
) ^ prefhome
;
1062 case IPV6_SADDR_RULE_OIF
:
1063 /* Rule 5: Prefer outgoing interface */
1064 ret
= (!dst
->ifindex
||
1065 dst
->ifindex
== score
->ifa
->idev
->dev
->ifindex
);
1067 case IPV6_SADDR_RULE_LABEL
:
1068 /* Rule 6: Prefer matching label */
1069 ret
= ipv6_addr_label(net
,
1070 &score
->ifa
->addr
, score
->addr_type
,
1071 score
->ifa
->idev
->dev
->ifindex
) == dst
->label
;
1073 #ifdef CONFIG_IPV6_PRIVACY
1074 case IPV6_SADDR_RULE_PRIVACY
:
1076 /* Rule 7: Prefer public address
1077 * Note: prefer temporary address if use_tempaddr >= 2
1079 int preftmp
= dst
->prefs
& (IPV6_PREFER_SRC_PUBLIC
|IPV6_PREFER_SRC_TMP
) ?
1080 !!(dst
->prefs
& IPV6_PREFER_SRC_TMP
) :
1081 score
->ifa
->idev
->cnf
.use_tempaddr
>= 2;
1082 ret
= (!(score
->ifa
->flags
& IFA_F_TEMPORARY
)) ^ preftmp
;
1086 case IPV6_SADDR_RULE_ORCHID
:
1087 /* Rule 8-: Prefer ORCHID vs ORCHID or
1088 * non-ORCHID vs non-ORCHID
1090 ret
= !(ipv6_addr_orchid(&score
->ifa
->addr
) ^
1091 ipv6_addr_orchid(dst
->addr
));
1093 case IPV6_SADDR_RULE_PREFIX
:
1094 /* Rule 8: Use longest matching prefix */
1095 score
->matchlen
= ret
= ipv6_addr_diff(&score
->ifa
->addr
,
1103 __set_bit(i
, score
->scorebits
);
1109 int ipv6_dev_get_saddr(struct net
*net
, struct net_device
*dst_dev
,
1110 const struct in6_addr
*daddr
, unsigned int prefs
,
1111 struct in6_addr
*saddr
)
1113 struct ipv6_saddr_score scores
[2],
1114 *score
= &scores
[0], *hiscore
= &scores
[1];
1115 struct ipv6_saddr_dst dst
;
1116 struct net_device
*dev
;
1119 dst_type
= __ipv6_addr_type(daddr
);
1121 dst
.ifindex
= dst_dev
? dst_dev
->ifindex
: 0;
1122 dst
.scope
= __ipv6_addr_src_scope(dst_type
);
1123 dst
.label
= ipv6_addr_label(net
, daddr
, dst_type
, dst
.ifindex
);
1127 hiscore
->ifa
= NULL
;
1131 for_each_netdev_rcu(net
, dev
) {
1132 struct inet6_dev
*idev
;
1134 /* Candidate Source Address (section 4)
1135 * - multicast and link-local destination address,
1136 * the set of candidate source address MUST only
1137 * include addresses assigned to interfaces
1138 * belonging to the same link as the outgoing
1140 * (- For site-local destination addresses, the
1141 * set of candidate source addresses MUST only
1142 * include addresses assigned to interfaces
1143 * belonging to the same site as the outgoing
1146 if (((dst_type
& IPV6_ADDR_MULTICAST
) ||
1147 dst
.scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
) &&
1148 dst
.ifindex
&& dev
->ifindex
!= dst
.ifindex
)
1151 idev
= __in6_dev_get(dev
);
1155 read_lock_bh(&idev
->lock
);
1156 list_for_each_entry(score
->ifa
, &idev
->addr_list
, if_list
) {
1160 * - Tentative Address (RFC2462 section 5.4)
1161 * - A tentative address is not considered
1162 * "assigned to an interface" in the traditional
1163 * sense, unless it is also flagged as optimistic.
1164 * - Candidate Source Address (section 4)
1165 * - In any case, anycast addresses, multicast
1166 * addresses, and the unspecified address MUST
1167 * NOT be included in a candidate set.
1169 if ((score
->ifa
->flags
& IFA_F_TENTATIVE
) &&
1170 (!(score
->ifa
->flags
& IFA_F_OPTIMISTIC
)))
1173 score
->addr_type
= __ipv6_addr_type(&score
->ifa
->addr
);
1175 if (unlikely(score
->addr_type
== IPV6_ADDR_ANY
||
1176 score
->addr_type
& IPV6_ADDR_MULTICAST
)) {
1177 LIMIT_NETDEBUG(KERN_DEBUG
1178 "ADDRCONF: unspecified / multicast address "
1179 "assigned as unicast address on %s",
1185 bitmap_zero(score
->scorebits
, IPV6_SADDR_RULE_MAX
);
1187 for (i
= 0; i
< IPV6_SADDR_RULE_MAX
; i
++) {
1188 int minihiscore
, miniscore
;
1190 minihiscore
= ipv6_get_saddr_eval(net
, hiscore
, &dst
, i
);
1191 miniscore
= ipv6_get_saddr_eval(net
, score
, &dst
, i
);
1193 if (minihiscore
> miniscore
) {
1194 if (i
== IPV6_SADDR_RULE_SCOPE
&&
1195 score
->scopedist
> 0) {
1198 * each remaining entry
1199 * has too small (not enough)
1200 * scope, because ifa entries
1201 * are sorted by their scope
1207 } else if (minihiscore
< miniscore
) {
1209 in6_ifa_put(hiscore
->ifa
);
1211 in6_ifa_hold(score
->ifa
);
1213 swap(hiscore
, score
);
1215 /* restore our iterator */
1216 score
->ifa
= hiscore
->ifa
;
1223 read_unlock_bh(&idev
->lock
);
1228 return -EADDRNOTAVAIL
;
1230 ipv6_addr_copy(saddr
, &hiscore
->ifa
->addr
);
1231 in6_ifa_put(hiscore
->ifa
);
1234 EXPORT_SYMBOL(ipv6_dev_get_saddr
);
1236 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1237 unsigned char banned_flags
)
1239 struct inet6_dev
*idev
;
1240 int err
= -EADDRNOTAVAIL
;
1243 idev
= __in6_dev_get(dev
);
1245 struct inet6_ifaddr
*ifp
;
1247 read_lock_bh(&idev
->lock
);
1248 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
1249 if (ifp
->scope
== IFA_LINK
&&
1250 !(ifp
->flags
& banned_flags
)) {
1251 ipv6_addr_copy(addr
, &ifp
->addr
);
1256 read_unlock_bh(&idev
->lock
);
1262 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1265 struct inet6_ifaddr
*ifp
;
1267 read_lock_bh(&idev
->lock
);
1268 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
)
1270 read_unlock_bh(&idev
->lock
);
1274 int ipv6_chk_addr(struct net
*net
, const struct in6_addr
*addr
,
1275 struct net_device
*dev
, int strict
)
1277 struct inet6_ifaddr
*ifp
;
1278 struct hlist_node
*node
;
1279 unsigned int hash
= ipv6_addr_hash(addr
);
1282 hlist_for_each_entry_rcu(ifp
, node
, &inet6_addr_lst
[hash
], addr_lst
) {
1283 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1285 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1286 !(ifp
->flags
&IFA_F_TENTATIVE
) &&
1287 (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1288 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))) {
1289 rcu_read_unlock_bh();
1294 rcu_read_unlock_bh();
1297 EXPORT_SYMBOL(ipv6_chk_addr
);
1299 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
1300 struct net_device
*dev
)
1302 unsigned int hash
= ipv6_addr_hash(addr
);
1303 struct inet6_ifaddr
*ifp
;
1304 struct hlist_node
*node
;
1306 hlist_for_each_entry(ifp
, node
, &inet6_addr_lst
[hash
], addr_lst
) {
1307 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1309 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1310 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1317 int ipv6_chk_prefix(const struct in6_addr
*addr
, struct net_device
*dev
)
1319 struct inet6_dev
*idev
;
1320 struct inet6_ifaddr
*ifa
;
1325 idev
= __in6_dev_get(dev
);
1327 read_lock_bh(&idev
->lock
);
1328 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
1329 onlink
= ipv6_prefix_equal(addr
, &ifa
->addr
,
1334 read_unlock_bh(&idev
->lock
);
1340 EXPORT_SYMBOL(ipv6_chk_prefix
);
1342 struct inet6_ifaddr
*ipv6_get_ifaddr(struct net
*net
, const struct in6_addr
*addr
,
1343 struct net_device
*dev
, int strict
)
1345 struct inet6_ifaddr
*ifp
, *result
= NULL
;
1346 unsigned int hash
= ipv6_addr_hash(addr
);
1347 struct hlist_node
*node
;
1350 hlist_for_each_entry_rcu_bh(ifp
, node
, &inet6_addr_lst
[hash
], addr_lst
) {
1351 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1353 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1354 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1355 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1362 rcu_read_unlock_bh();
1367 /* Gets referenced address, destroys ifaddr */
1369 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
, int dad_failed
)
1371 if (ifp
->flags
&IFA_F_PERMANENT
) {
1372 spin_lock_bh(&ifp
->lock
);
1373 addrconf_del_timer(ifp
);
1374 ifp
->flags
|= IFA_F_TENTATIVE
;
1376 ifp
->flags
|= IFA_F_DADFAILED
;
1377 spin_unlock_bh(&ifp
->lock
);
1379 ipv6_ifa_notify(0, ifp
);
1381 #ifdef CONFIG_IPV6_PRIVACY
1382 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1383 struct inet6_ifaddr
*ifpub
;
1384 spin_lock_bh(&ifp
->lock
);
1387 in6_ifa_hold(ifpub
);
1388 spin_unlock_bh(&ifp
->lock
);
1389 ipv6_create_tempaddr(ifpub
, ifp
);
1392 spin_unlock_bh(&ifp
->lock
);
1400 static int addrconf_dad_end(struct inet6_ifaddr
*ifp
)
1404 spin_lock(&ifp
->state_lock
);
1405 if (ifp
->state
== INET6_IFADDR_STATE_DAD
) {
1406 ifp
->state
= INET6_IFADDR_STATE_POSTDAD
;
1409 spin_unlock(&ifp
->state_lock
);
1414 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1416 struct inet6_dev
*idev
= ifp
->idev
;
1418 if (addrconf_dad_end(ifp
)) {
1423 if (net_ratelimit())
1424 printk(KERN_INFO
"%s: IPv6 duplicate address %pI6c detected!\n",
1425 ifp
->idev
->dev
->name
, &ifp
->addr
);
1427 if (idev
->cnf
.accept_dad
> 1 && !idev
->cnf
.disable_ipv6
) {
1428 struct in6_addr addr
;
1430 addr
.s6_addr32
[0] = htonl(0xfe800000);
1431 addr
.s6_addr32
[1] = 0;
1433 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) &&
1434 ipv6_addr_equal(&ifp
->addr
, &addr
)) {
1435 /* DAD failed for link-local based on MAC address */
1436 idev
->cnf
.disable_ipv6
= 1;
1438 printk(KERN_INFO
"%s: IPv6 being disabled!\n",
1439 ifp
->idev
->dev
->name
);
1443 addrconf_dad_stop(ifp
, 1);
1446 /* Join to solicited addr multicast group. */
1448 void addrconf_join_solict(struct net_device
*dev
, const struct in6_addr
*addr
)
1450 struct in6_addr maddr
;
1452 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1455 addrconf_addr_solict_mult(addr
, &maddr
);
1456 ipv6_dev_mc_inc(dev
, &maddr
);
1459 void addrconf_leave_solict(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
1461 struct in6_addr maddr
;
1463 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1466 addrconf_addr_solict_mult(addr
, &maddr
);
1467 __ipv6_dev_mc_dec(idev
, &maddr
);
1470 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1472 struct in6_addr addr
;
1473 if (ifp
->prefix_len
== 127) /* RFC 6164 */
1475 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1476 if (ipv6_addr_any(&addr
))
1478 ipv6_dev_ac_inc(ifp
->idev
->dev
, &addr
);
1481 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1483 struct in6_addr addr
;
1484 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1485 if (ipv6_addr_any(&addr
))
1487 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1490 static int addrconf_ifid_eui48(u8
*eui
, struct net_device
*dev
)
1492 if (dev
->addr_len
!= ETH_ALEN
)
1494 memcpy(eui
, dev
->dev_addr
, 3);
1495 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1498 * The zSeries OSA network cards can be shared among various
1499 * OS instances, but the OSA cards have only one MAC address.
1500 * This leads to duplicate address conflicts in conjunction
1501 * with IPv6 if more than one instance uses the same card.
1503 * The driver for these cards can deliver a unique 16-bit
1504 * identifier for each instance sharing the same card. It is
1505 * placed instead of 0xFFFE in the interface identifier. The
1506 * "u" bit of the interface identifier is not inverted in this
1507 * case. Hence the resulting interface identifier has local
1508 * scope according to RFC2373.
1511 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1512 eui
[4] = dev
->dev_id
& 0xFF;
1521 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
1523 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1524 if (dev
->addr_len
!= ARCNET_ALEN
)
1527 eui
[7] = *(u8
*)dev
->dev_addr
;
1531 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
1533 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1535 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1540 static int __ipv6_isatap_ifid(u8
*eui
, __be32 addr
)
1544 eui
[0] = (ipv4_is_zeronet(addr
) || ipv4_is_private_10(addr
) ||
1545 ipv4_is_loopback(addr
) || ipv4_is_linklocal_169(addr
) ||
1546 ipv4_is_private_172(addr
) || ipv4_is_test_192(addr
) ||
1547 ipv4_is_anycast_6to4(addr
) || ipv4_is_private_192(addr
) ||
1548 ipv4_is_test_198(addr
) || ipv4_is_multicast(addr
) ||
1549 ipv4_is_lbcast(addr
)) ? 0x00 : 0x02;
1553 memcpy(eui
+ 4, &addr
, 4);
1557 static int addrconf_ifid_sit(u8
*eui
, struct net_device
*dev
)
1559 if (dev
->priv_flags
& IFF_ISATAP
)
1560 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
1564 static int addrconf_ifid_gre(u8
*eui
, struct net_device
*dev
)
1566 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
1569 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1571 switch (dev
->type
) {
1574 case ARPHRD_IEEE802_TR
:
1575 return addrconf_ifid_eui48(eui
, dev
);
1577 return addrconf_ifid_arcnet(eui
, dev
);
1578 case ARPHRD_INFINIBAND
:
1579 return addrconf_ifid_infiniband(eui
, dev
);
1581 return addrconf_ifid_sit(eui
, dev
);
1583 return addrconf_ifid_gre(eui
, dev
);
1588 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1591 struct inet6_ifaddr
*ifp
;
1593 read_lock_bh(&idev
->lock
);
1594 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
1595 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1596 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1601 read_unlock_bh(&idev
->lock
);
1605 #ifdef CONFIG_IPV6_PRIVACY
1606 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1607 static int __ipv6_regen_rndid(struct inet6_dev
*idev
)
1610 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
1611 idev
->rndid
[0] &= ~0x02;
1614 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1615 * check if generated address is not inappropriate
1617 * - Reserved subnet anycast (RFC 2526)
1618 * 11111101 11....11 1xxxxxxx
1619 * - ISATAP (RFC4214) 6.1
1620 * 00-00-5E-FE-xx-xx-xx-xx
1622 * - XXX: already assigned to an address on the device
1624 if (idev
->rndid
[0] == 0xfd &&
1625 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1626 (idev
->rndid
[7]&0x80))
1628 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1629 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1631 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1638 static void ipv6_regen_rndid(unsigned long data
)
1640 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1641 unsigned long expires
;
1644 write_lock_bh(&idev
->lock
);
1649 if (__ipv6_regen_rndid(idev
) < 0)
1653 idev
->cnf
.temp_prefered_lft
* HZ
-
1654 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
-
1655 idev
->cnf
.max_desync_factor
* HZ
;
1656 if (time_before(expires
, jiffies
)) {
1658 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1663 if (!mod_timer(&idev
->regen_timer
, expires
))
1667 write_unlock_bh(&idev
->lock
);
1668 rcu_read_unlock_bh();
1672 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
) {
1675 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1676 ret
= __ipv6_regen_rndid(idev
);
1686 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1687 unsigned long expires
, u32 flags
)
1689 struct fib6_config cfg
= {
1690 .fc_table
= RT6_TABLE_PREFIX
,
1691 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1692 .fc_ifindex
= dev
->ifindex
,
1693 .fc_expires
= expires
,
1695 .fc_flags
= RTF_UP
| flags
,
1696 .fc_nlinfo
.nl_net
= dev_net(dev
),
1697 .fc_protocol
= RTPROT_KERNEL
,
1700 ipv6_addr_copy(&cfg
.fc_dst
, pfx
);
1702 /* Prevent useless cloning on PtP SIT.
1703 This thing is done here expecting that the whole
1704 class of non-broadcast devices need not cloning.
1706 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1707 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
1708 cfg
.fc_flags
|= RTF_NONEXTHOP
;
1711 ip6_route_add(&cfg
);
1714 /* Create "default" multicast route to the interface */
1716 static void addrconf_add_mroute(struct net_device
*dev
)
1718 struct fib6_config cfg
= {
1719 .fc_table
= RT6_TABLE_LOCAL
,
1720 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1721 .fc_ifindex
= dev
->ifindex
,
1724 .fc_nlinfo
.nl_net
= dev_net(dev
),
1727 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
1729 ip6_route_add(&cfg
);
1732 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1733 static void sit_route_add(struct net_device
*dev
)
1735 struct fib6_config cfg
= {
1736 .fc_table
= RT6_TABLE_MAIN
,
1737 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1738 .fc_ifindex
= dev
->ifindex
,
1740 .fc_flags
= RTF_UP
| RTF_NONEXTHOP
,
1741 .fc_nlinfo
.nl_net
= dev_net(dev
),
1744 /* prefix length - 96 bits "::d.d.d.d" */
1745 ip6_route_add(&cfg
);
1749 static void addrconf_add_lroute(struct net_device
*dev
)
1751 struct in6_addr addr
;
1753 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
1754 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
1757 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
1759 struct inet6_dev
*idev
;
1763 idev
= ipv6_find_idev(dev
);
1765 return ERR_PTR(-ENOBUFS
);
1767 if (idev
->cnf
.disable_ipv6
)
1768 return ERR_PTR(-EACCES
);
1770 /* Add default multicast route */
1771 addrconf_add_mroute(dev
);
1773 /* Add link local route */
1774 addrconf_add_lroute(dev
);
1778 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
)
1780 struct prefix_info
*pinfo
;
1784 struct inet6_dev
*in6_dev
;
1785 struct net
*net
= dev_net(dev
);
1787 pinfo
= (struct prefix_info
*) opt
;
1789 if (len
< sizeof(struct prefix_info
)) {
1790 ADBG(("addrconf: prefix option too short\n"));
1795 * Validation checks ([ADDRCONF], page 19)
1798 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
1800 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
1803 valid_lft
= ntohl(pinfo
->valid
);
1804 prefered_lft
= ntohl(pinfo
->prefered
);
1806 if (prefered_lft
> valid_lft
) {
1807 if (net_ratelimit())
1808 printk(KERN_WARNING
"addrconf: prefix option has invalid lifetime\n");
1812 in6_dev
= in6_dev_get(dev
);
1814 if (in6_dev
== NULL
) {
1815 if (net_ratelimit())
1816 printk(KERN_DEBUG
"addrconf: device %s not configured\n", dev
->name
);
1821 * Two things going on here:
1822 * 1) Add routes for on-link prefixes
1823 * 2) Configure prefixes with the auto flag set
1826 if (pinfo
->onlink
) {
1827 struct rt6_info
*rt
;
1828 unsigned long rt_expires
;
1830 /* Avoid arithmetic overflow. Really, we could
1831 * save rt_expires in seconds, likely valid_lft,
1832 * but it would require division in fib gc, that it
1836 rt_expires
= addrconf_timeout_fixup(valid_lft
, HZ
);
1838 rt_expires
= addrconf_timeout_fixup(valid_lft
, USER_HZ
);
1840 if (addrconf_finite_timeout(rt_expires
))
1843 rt
= rt6_lookup(net
, &pinfo
->prefix
, NULL
,
1846 if (rt
&& addrconf_is_prefix_route(rt
)) {
1847 /* Autoconf prefix route */
1848 if (valid_lft
== 0) {
1851 } else if (addrconf_finite_timeout(rt_expires
)) {
1853 rt
->rt6i_expires
= jiffies
+ rt_expires
;
1854 rt
->rt6i_flags
|= RTF_EXPIRES
;
1856 rt
->rt6i_flags
&= ~RTF_EXPIRES
;
1857 rt
->rt6i_expires
= 0;
1859 } else if (valid_lft
) {
1860 clock_t expires
= 0;
1861 int flags
= RTF_ADDRCONF
| RTF_PREFIX_RT
;
1862 if (addrconf_finite_timeout(rt_expires
)) {
1864 flags
|= RTF_EXPIRES
;
1865 expires
= jiffies_to_clock_t(rt_expires
);
1867 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
1868 dev
, expires
, flags
);
1871 dst_release(&rt
->dst
);
1874 /* Try to figure out our local address for this prefix */
1876 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
1877 struct inet6_ifaddr
* ifp
;
1878 struct in6_addr addr
;
1879 int create
= 0, update_lft
= 0;
1881 if (pinfo
->prefix_len
== 64) {
1882 memcpy(&addr
, &pinfo
->prefix
, 8);
1883 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
1884 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
1885 in6_dev_put(in6_dev
);
1890 if (net_ratelimit())
1891 printk(KERN_DEBUG
"IPv6 addrconf: prefix with wrong length %d\n",
1893 in6_dev_put(in6_dev
);
1898 ifp
= ipv6_get_ifaddr(net
, &addr
, dev
, 1);
1900 if (ifp
== NULL
&& valid_lft
) {
1901 int max_addresses
= in6_dev
->cnf
.max_addresses
;
1904 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1905 if (in6_dev
->cnf
.optimistic_dad
&&
1906 !net
->ipv6
.devconf_all
->forwarding
)
1907 addr_flags
= IFA_F_OPTIMISTIC
;
1910 /* Do not allow to create too much of autoconfigured
1911 * addresses; this would be too easy way to crash kernel.
1913 if (!max_addresses
||
1914 ipv6_count_addresses(in6_dev
) < max_addresses
)
1915 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
1916 addr_type
&IPV6_ADDR_SCOPE_MASK
,
1919 if (!ifp
|| IS_ERR(ifp
)) {
1920 in6_dev_put(in6_dev
);
1924 update_lft
= create
= 1;
1925 ifp
->cstamp
= jiffies
;
1926 addrconf_dad_start(ifp
, RTF_ADDRCONF
|RTF_PREFIX_RT
);
1932 #ifdef CONFIG_IPV6_PRIVACY
1933 struct inet6_ifaddr
*ift
;
1937 /* update lifetime (RFC2462 5.5.3 e) */
1938 spin_lock(&ifp
->lock
);
1940 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
1941 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
1944 if (!update_lft
&& stored_lft
) {
1945 if (valid_lft
> MIN_VALID_LIFETIME
||
1946 valid_lft
> stored_lft
)
1948 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
1949 /* valid_lft <= stored_lft is always true */
1951 * RFC 4862 Section 5.5.3e:
1952 * "Note that the preferred lifetime of
1953 * the corresponding address is always
1954 * reset to the Preferred Lifetime in
1955 * the received Prefix Information
1956 * option, regardless of whether the
1957 * valid lifetime is also reset or
1960 * So if the preferred lifetime in
1961 * this advertisement is different
1962 * than what we have stored, but the
1963 * valid lifetime is invalid, just
1964 * reset prefered_lft.
1966 * We must set the valid lifetime
1967 * to the stored lifetime since we'll
1968 * be updating the timestamp below,
1969 * else we'll set it back to the
1972 if (prefered_lft
!= ifp
->prefered_lft
) {
1973 valid_lft
= stored_lft
;
1977 valid_lft
= MIN_VALID_LIFETIME
;
1978 if (valid_lft
< prefered_lft
)
1979 prefered_lft
= valid_lft
;
1985 ifp
->valid_lft
= valid_lft
;
1986 ifp
->prefered_lft
= prefered_lft
;
1989 ifp
->flags
&= ~IFA_F_DEPRECATED
;
1990 spin_unlock(&ifp
->lock
);
1992 if (!(flags
&IFA_F_TENTATIVE
))
1993 ipv6_ifa_notify(0, ifp
);
1995 spin_unlock(&ifp
->lock
);
1997 #ifdef CONFIG_IPV6_PRIVACY
1998 read_lock_bh(&in6_dev
->lock
);
1999 /* update all temporary addresses in the list */
2000 list_for_each_entry(ift
, &in6_dev
->tempaddr_list
, tmp_list
) {
2002 * When adjusting the lifetimes of an existing
2003 * temporary address, only lower the lifetimes.
2004 * Implementations must not increase the
2005 * lifetimes of an existing temporary address
2006 * when processing a Prefix Information Option.
2008 if (ifp
!= ift
->ifpub
)
2011 spin_lock(&ift
->lock
);
2013 if (ift
->valid_lft
> valid_lft
&&
2014 ift
->valid_lft
- valid_lft
> (jiffies
- ift
->tstamp
) / HZ
)
2015 ift
->valid_lft
= valid_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
2016 if (ift
->prefered_lft
> prefered_lft
&&
2017 ift
->prefered_lft
- prefered_lft
> (jiffies
- ift
->tstamp
) / HZ
)
2018 ift
->prefered_lft
= prefered_lft
+ (jiffies
- ift
->tstamp
) / HZ
;
2019 spin_unlock(&ift
->lock
);
2020 if (!(flags
&IFA_F_TENTATIVE
))
2021 ipv6_ifa_notify(0, ift
);
2024 if ((create
|| list_empty(&in6_dev
->tempaddr_list
)) && in6_dev
->cnf
.use_tempaddr
> 0) {
2026 * When a new public address is created as described in [ADDRCONF],
2027 * also create a new temporary address. Also create a temporary
2028 * address if it's enabled but no temporary address currently exists.
2030 read_unlock_bh(&in6_dev
->lock
);
2031 ipv6_create_tempaddr(ifp
, NULL
);
2033 read_unlock_bh(&in6_dev
->lock
);
2040 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
2041 in6_dev_put(in6_dev
);
2045 * Set destination address.
2046 * Special case for SIT interfaces where we create a new "virtual"
2049 int addrconf_set_dstaddr(struct net
*net
, void __user
*arg
)
2051 struct in6_ifreq ireq
;
2052 struct net_device
*dev
;
2058 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2061 dev
= __dev_get_by_index(net
, ireq
.ifr6_ifindex
);
2067 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2068 if (dev
->type
== ARPHRD_SIT
) {
2069 const struct net_device_ops
*ops
= dev
->netdev_ops
;
2071 struct ip_tunnel_parm p
;
2073 err
= -EADDRNOTAVAIL
;
2074 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
2077 memset(&p
, 0, sizeof(p
));
2078 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
2082 p
.iph
.protocol
= IPPROTO_IPV6
;
2084 ifr
.ifr_ifru
.ifru_data
= (__force
void __user
*)&p
;
2086 if (ops
->ndo_do_ioctl
) {
2087 mm_segment_t oldfs
= get_fs();
2090 err
= ops
->ndo_do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
2097 dev
= __dev_get_by_name(net
, p
.name
);
2100 err
= dev_open(dev
);
2111 * Manual configuration of address on an interface
2113 static int inet6_addr_add(struct net
*net
, int ifindex
, const struct in6_addr
*pfx
,
2114 unsigned int plen
, __u8 ifa_flags
, __u32 prefered_lft
,
2117 struct inet6_ifaddr
*ifp
;
2118 struct inet6_dev
*idev
;
2119 struct net_device
*dev
;
2123 unsigned long timeout
;
2130 /* check the lifetime */
2131 if (!valid_lft
|| prefered_lft
> valid_lft
)
2134 dev
= __dev_get_by_index(net
, ifindex
);
2138 idev
= addrconf_add_dev(dev
);
2140 return PTR_ERR(idev
);
2142 scope
= ipv6_addr_scope(pfx
);
2144 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
2145 if (addrconf_finite_timeout(timeout
)) {
2146 expires
= jiffies_to_clock_t(timeout
* HZ
);
2147 valid_lft
= timeout
;
2148 flags
= RTF_EXPIRES
;
2152 ifa_flags
|= IFA_F_PERMANENT
;
2155 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
2156 if (addrconf_finite_timeout(timeout
)) {
2158 ifa_flags
|= IFA_F_DEPRECATED
;
2159 prefered_lft
= timeout
;
2162 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, ifa_flags
);
2165 spin_lock_bh(&ifp
->lock
);
2166 ifp
->valid_lft
= valid_lft
;
2167 ifp
->prefered_lft
= prefered_lft
;
2168 ifp
->tstamp
= jiffies
;
2169 spin_unlock_bh(&ifp
->lock
);
2171 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
2174 * Note that section 3.1 of RFC 4429 indicates
2175 * that the Optimistic flag should not be set for
2176 * manually configured addresses
2178 addrconf_dad_start(ifp
, 0);
2184 return PTR_ERR(ifp
);
2187 static int inet6_addr_del(struct net
*net
, int ifindex
, const struct in6_addr
*pfx
,
2190 struct inet6_ifaddr
*ifp
;
2191 struct inet6_dev
*idev
;
2192 struct net_device
*dev
;
2197 dev
= __dev_get_by_index(net
, ifindex
);
2201 if ((idev
= __in6_dev_get(dev
)) == NULL
)
2204 read_lock_bh(&idev
->lock
);
2205 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
2206 if (ifp
->prefix_len
== plen
&&
2207 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
2209 read_unlock_bh(&idev
->lock
);
2213 /* If the last address is deleted administratively,
2214 disable IPv6 on this interface.
2216 if (list_empty(&idev
->addr_list
))
2217 addrconf_ifdown(idev
->dev
, 1);
2221 read_unlock_bh(&idev
->lock
);
2222 return -EADDRNOTAVAIL
;
2226 int addrconf_add_ifaddr(struct net
*net
, void __user
*arg
)
2228 struct in6_ifreq ireq
;
2231 if (!capable(CAP_NET_ADMIN
))
2234 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2238 err
= inet6_addr_add(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2239 ireq
.ifr6_prefixlen
, IFA_F_PERMANENT
,
2240 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2245 int addrconf_del_ifaddr(struct net
*net
, void __user
*arg
)
2247 struct in6_ifreq ireq
;
2250 if (!capable(CAP_NET_ADMIN
))
2253 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2257 err
= inet6_addr_del(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2258 ireq
.ifr6_prefixlen
);
2263 static void add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
2264 int plen
, int scope
)
2266 struct inet6_ifaddr
*ifp
;
2268 ifp
= ipv6_add_addr(idev
, addr
, plen
, scope
, IFA_F_PERMANENT
);
2270 spin_lock_bh(&ifp
->lock
);
2271 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2272 spin_unlock_bh(&ifp
->lock
);
2273 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2278 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2279 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
2281 struct in6_addr addr
;
2282 struct net_device
*dev
;
2283 struct net
*net
= dev_net(idev
->dev
);
2288 memset(&addr
, 0, sizeof(struct in6_addr
));
2289 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
2291 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
2292 addr
.s6_addr32
[0] = htonl(0xfe800000);
2295 scope
= IPV6_ADDR_COMPATv4
;
2298 if (addr
.s6_addr32
[3]) {
2299 add_addr(idev
, &addr
, 128, scope
);
2303 for_each_netdev(net
, dev
) {
2304 struct in_device
* in_dev
= __in_dev_get_rtnl(dev
);
2305 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
2306 struct in_ifaddr
* ifa
;
2310 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
2313 addr
.s6_addr32
[3] = ifa
->ifa_local
;
2315 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
2317 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
2318 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2322 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2327 add_addr(idev
, &addr
, plen
, flag
);
2334 static void init_loopback(struct net_device
*dev
)
2336 struct inet6_dev
*idev
;
2342 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2343 printk(KERN_DEBUG
"init loopback: add_dev failed\n");
2347 add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
);
2350 static void addrconf_add_linklocal(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
2352 struct inet6_ifaddr
* ifp
;
2353 u32 addr_flags
= IFA_F_PERMANENT
;
2355 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2356 if (idev
->cnf
.optimistic_dad
&&
2357 !dev_net(idev
->dev
)->ipv6
.devconf_all
->forwarding
)
2358 addr_flags
|= IFA_F_OPTIMISTIC
;
2362 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, addr_flags
);
2364 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
2365 addrconf_dad_start(ifp
, 0);
2370 static void addrconf_dev_config(struct net_device
*dev
)
2372 struct in6_addr addr
;
2373 struct inet6_dev
* idev
;
2377 if ((dev
->type
!= ARPHRD_ETHER
) &&
2378 (dev
->type
!= ARPHRD_FDDI
) &&
2379 (dev
->type
!= ARPHRD_IEEE802_TR
) &&
2380 (dev
->type
!= ARPHRD_ARCNET
) &&
2381 (dev
->type
!= ARPHRD_INFINIBAND
)) {
2382 /* Alas, we support only Ethernet autoconfiguration. */
2386 idev
= addrconf_add_dev(dev
);
2390 memset(&addr
, 0, sizeof(struct in6_addr
));
2391 addr
.s6_addr32
[0] = htonl(0xFE800000);
2393 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
2394 addrconf_add_linklocal(idev
, &addr
);
2397 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2398 static void addrconf_sit_config(struct net_device
*dev
)
2400 struct inet6_dev
*idev
;
2405 * Configure the tunnel with one of our IPv4
2406 * addresses... we should configure all of
2407 * our v4 addrs in the tunnel
2410 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2411 printk(KERN_DEBUG
"init sit: add_dev failed\n");
2415 if (dev
->priv_flags
& IFF_ISATAP
) {
2416 struct in6_addr addr
;
2418 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2419 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
2420 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
))
2421 addrconf_add_linklocal(idev
, &addr
);
2425 sit_add_v4_addrs(idev
);
2427 if (dev
->flags
&IFF_POINTOPOINT
) {
2428 addrconf_add_mroute(dev
);
2429 addrconf_add_lroute(dev
);
2435 #if defined(CONFIG_NET_IPGRE) || defined(CONFIG_NET_IPGRE_MODULE)
2436 static void addrconf_gre_config(struct net_device
*dev
)
2438 struct inet6_dev
*idev
;
2439 struct in6_addr addr
;
2441 pr_info("ipv6: addrconf_gre_config(%s)\n", dev
->name
);
2445 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2446 printk(KERN_DEBUG
"init gre: add_dev failed\n");
2450 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2451 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
2453 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
))
2454 addrconf_add_linklocal(idev
, &addr
);
2459 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
2461 struct in6_addr lladdr
;
2463 if (!ipv6_get_lladdr(link_dev
, &lladdr
, IFA_F_TENTATIVE
)) {
2464 addrconf_add_linklocal(idev
, &lladdr
);
2470 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
2472 struct net_device
*link_dev
;
2473 struct net
*net
= dev_net(idev
->dev
);
2475 /* first try to inherit the link-local address from the link device */
2476 if (idev
->dev
->iflink
&&
2477 (link_dev
= __dev_get_by_index(net
, idev
->dev
->iflink
))) {
2478 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2481 /* then try to inherit it from any device */
2482 for_each_netdev(net
, link_dev
) {
2483 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2486 printk(KERN_DEBUG
"init ip6-ip6: add_linklocal failed\n");
2490 * Autoconfigure tunnel with a link-local address so routing protocols,
2491 * DHCPv6, MLD etc. can be run over the virtual link
2494 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
2496 struct inet6_dev
*idev
;
2500 idev
= addrconf_add_dev(dev
);
2502 printk(KERN_DEBUG
"init ip6-ip6: add_dev failed\n");
2505 ip6_tnl_add_linklocal(idev
);
2508 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
2511 struct net_device
*dev
= (struct net_device
*) data
;
2512 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2513 int run_pending
= 0;
2517 case NETDEV_REGISTER
:
2518 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2519 idev
= ipv6_add_dev(dev
);
2521 return notifier_from_errno(-ENOMEM
);
2527 if (dev
->flags
& IFF_SLAVE
)
2530 if (event
== NETDEV_UP
) {
2531 if (!addrconf_qdisc_ok(dev
)) {
2532 /* device is not ready yet. */
2534 "ADDRCONF(NETDEV_UP): %s: "
2535 "link is not ready\n",
2540 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
)
2541 idev
= ipv6_add_dev(dev
);
2544 idev
->if_flags
|= IF_READY
;
2548 if (!addrconf_qdisc_ok(dev
)) {
2549 /* device is still not ready. */
2554 if (idev
->if_flags
& IF_READY
)
2555 /* device is already configured. */
2557 idev
->if_flags
|= IF_READY
;
2561 "ADDRCONF(NETDEV_CHANGE): %s: "
2562 "link becomes ready\n",
2568 switch (dev
->type
) {
2569 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2571 addrconf_sit_config(dev
);
2574 #if defined(CONFIG_NET_IPGRE) || defined(CONFIG_NET_IPGRE_MODULE)
2576 addrconf_gre_config(dev
);
2579 case ARPHRD_TUNNEL6
:
2580 addrconf_ip6_tnl_config(dev
);
2582 case ARPHRD_LOOPBACK
:
2587 addrconf_dev_config(dev
);
2593 addrconf_dad_run(idev
);
2596 * If the MTU changed during the interface down,
2597 * when the interface up, the changed MTU must be
2598 * reflected in the idev as well as routers.
2600 if (idev
->cnf
.mtu6
!= dev
->mtu
&&
2601 dev
->mtu
>= IPV6_MIN_MTU
) {
2602 rt6_mtu_change(dev
, dev
->mtu
);
2603 idev
->cnf
.mtu6
= dev
->mtu
;
2605 idev
->tstamp
= jiffies
;
2606 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2609 * If the changed mtu during down is lower than
2610 * IPV6_MIN_MTU stop IPv6 on this interface.
2612 if (dev
->mtu
< IPV6_MIN_MTU
)
2613 addrconf_ifdown(dev
, 1);
2617 case NETDEV_CHANGEMTU
:
2618 if (idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2619 rt6_mtu_change(dev
, dev
->mtu
);
2620 idev
->cnf
.mtu6
= dev
->mtu
;
2624 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2625 idev
= ipv6_add_dev(dev
);
2631 * MTU falled under IPV6_MIN_MTU.
2632 * Stop IPv6 on this interface.
2636 case NETDEV_UNREGISTER
:
2638 * Remove all addresses from this interface.
2640 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2643 case NETDEV_CHANGENAME
:
2645 snmp6_unregister_dev(idev
);
2646 addrconf_sysctl_unregister(idev
);
2647 addrconf_sysctl_register(idev
);
2648 err
= snmp6_register_dev(idev
);
2650 return notifier_from_errno(err
);
2654 case NETDEV_PRE_TYPE_CHANGE
:
2655 case NETDEV_POST_TYPE_CHANGE
:
2656 addrconf_type_change(dev
, event
);
2664 * addrconf module should be notified of a device going up
2666 static struct notifier_block ipv6_dev_notf
= {
2667 .notifier_call
= addrconf_notify
,
2670 static void addrconf_type_change(struct net_device
*dev
, unsigned long event
)
2672 struct inet6_dev
*idev
;
2675 idev
= __in6_dev_get(dev
);
2677 if (event
== NETDEV_POST_TYPE_CHANGE
)
2678 ipv6_mc_remap(idev
);
2679 else if (event
== NETDEV_PRE_TYPE_CHANGE
)
2680 ipv6_mc_unmap(idev
);
2683 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2685 struct net
*net
= dev_net(dev
);
2686 struct inet6_dev
*idev
;
2687 struct inet6_ifaddr
*ifa
;
2692 rt6_ifdown(net
, dev
);
2693 neigh_ifdown(&nd_tbl
, dev
);
2695 idev
= __in6_dev_get(dev
);
2700 * Step 1: remove reference to ipv6 device from parent device.
2706 /* protected by rtnl_lock */
2707 rcu_assign_pointer(dev
->ip6_ptr
, NULL
);
2709 /* Step 1.5: remove snmp6 entry */
2710 snmp6_unregister_dev(idev
);
2714 /* Step 2: clear hash table */
2715 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
2716 struct hlist_head
*h
= &inet6_addr_lst
[i
];
2717 struct hlist_node
*n
;
2719 spin_lock_bh(&addrconf_hash_lock
);
2721 hlist_for_each_entry_rcu(ifa
, n
, h
, addr_lst
) {
2722 if (ifa
->idev
== idev
) {
2723 hlist_del_init_rcu(&ifa
->addr_lst
);
2724 addrconf_del_timer(ifa
);
2728 spin_unlock_bh(&addrconf_hash_lock
);
2731 write_lock_bh(&idev
->lock
);
2733 /* Step 2: clear flags for stateless addrconf */
2735 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
2737 #ifdef CONFIG_IPV6_PRIVACY
2738 if (how
&& del_timer(&idev
->regen_timer
))
2741 /* Step 3: clear tempaddr list */
2742 while (!list_empty(&idev
->tempaddr_list
)) {
2743 ifa
= list_first_entry(&idev
->tempaddr_list
,
2744 struct inet6_ifaddr
, tmp_list
);
2745 list_del(&ifa
->tmp_list
);
2746 write_unlock_bh(&idev
->lock
);
2747 spin_lock_bh(&ifa
->lock
);
2750 in6_ifa_put(ifa
->ifpub
);
2753 spin_unlock_bh(&ifa
->lock
);
2755 write_lock_bh(&idev
->lock
);
2759 while (!list_empty(&idev
->addr_list
)) {
2760 ifa
= list_first_entry(&idev
->addr_list
,
2761 struct inet6_ifaddr
, if_list
);
2762 addrconf_del_timer(ifa
);
2764 list_del(&ifa
->if_list
);
2766 write_unlock_bh(&idev
->lock
);
2768 spin_lock_bh(&ifa
->state_lock
);
2770 ifa
->state
= INET6_IFADDR_STATE_DEAD
;
2771 spin_unlock_bh(&ifa
->state_lock
);
2773 if (state
!= INET6_IFADDR_STATE_DEAD
) {
2774 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
2775 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifa
);
2779 write_lock_bh(&idev
->lock
);
2782 write_unlock_bh(&idev
->lock
);
2784 /* Step 5: Discard multicast list */
2786 ipv6_mc_destroy_dev(idev
);
2790 idev
->tstamp
= jiffies
;
2792 /* Last: Shot the device (if unregistered) */
2794 addrconf_sysctl_unregister(idev
);
2795 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
2796 neigh_ifdown(&nd_tbl
, dev
);
2802 static void addrconf_rs_timer(unsigned long data
)
2804 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2805 struct inet6_dev
*idev
= ifp
->idev
;
2807 read_lock(&idev
->lock
);
2808 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
))
2811 if (idev
->cnf
.forwarding
)
2814 /* Announcement received after solicitation was sent */
2815 if (idev
->if_flags
& IF_RA_RCVD
)
2818 spin_lock(&ifp
->lock
);
2819 if (ifp
->probes
++ < idev
->cnf
.rtr_solicits
) {
2820 /* The wait after the last probe can be shorter */
2821 addrconf_mod_timer(ifp
, AC_RS
,
2822 (ifp
->probes
== idev
->cnf
.rtr_solicits
) ?
2823 idev
->cnf
.rtr_solicit_delay
:
2824 idev
->cnf
.rtr_solicit_interval
);
2825 spin_unlock(&ifp
->lock
);
2827 ndisc_send_rs(idev
->dev
, &ifp
->addr
, &in6addr_linklocal_allrouters
);
2829 spin_unlock(&ifp
->lock
);
2831 * Note: we do not support deprecated "all on-link"
2832 * assumption any longer.
2834 printk(KERN_DEBUG
"%s: no IPv6 routers present\n",
2839 read_unlock(&idev
->lock
);
2844 * Duplicate Address Detection
2846 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
2848 unsigned long rand_num
;
2849 struct inet6_dev
*idev
= ifp
->idev
;
2851 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
2854 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
2856 ifp
->probes
= idev
->cnf
.dad_transmits
;
2857 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
2860 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
, u32 flags
)
2862 struct inet6_dev
*idev
= ifp
->idev
;
2863 struct net_device
*dev
= idev
->dev
;
2865 addrconf_join_solict(dev
, &ifp
->addr
);
2867 net_srandom(ifp
->addr
.s6_addr32
[3]);
2869 read_lock_bh(&idev
->lock
);
2870 spin_lock(&ifp
->lock
);
2871 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
)
2874 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
2875 idev
->cnf
.accept_dad
< 1 ||
2876 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
2877 ifp
->flags
& IFA_F_NODAD
) {
2878 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
2879 spin_unlock(&ifp
->lock
);
2880 read_unlock_bh(&idev
->lock
);
2882 addrconf_dad_completed(ifp
);
2886 if (!(idev
->if_flags
& IF_READY
)) {
2887 spin_unlock(&ifp
->lock
);
2888 read_unlock_bh(&idev
->lock
);
2890 * If the device is not ready:
2891 * - keep it tentative if it is a permanent address.
2892 * - otherwise, kill it.
2895 addrconf_dad_stop(ifp
, 0);
2900 * Optimistic nodes can start receiving
2903 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
2904 ip6_ins_rt(ifp
->rt
);
2906 addrconf_dad_kick(ifp
);
2908 spin_unlock(&ifp
->lock
);
2909 read_unlock_bh(&idev
->lock
);
2912 static void addrconf_dad_timer(unsigned long data
)
2914 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2915 struct inet6_dev
*idev
= ifp
->idev
;
2916 struct in6_addr mcaddr
;
2918 if (!ifp
->probes
&& addrconf_dad_end(ifp
))
2921 read_lock(&idev
->lock
);
2922 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
)) {
2923 read_unlock(&idev
->lock
);
2927 spin_lock(&ifp
->lock
);
2928 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
) {
2929 spin_unlock(&ifp
->lock
);
2930 read_unlock(&idev
->lock
);
2934 if (ifp
->probes
== 0) {
2936 * DAD was successful
2939 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
2940 spin_unlock(&ifp
->lock
);
2941 read_unlock(&idev
->lock
);
2943 addrconf_dad_completed(ifp
);
2949 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
2950 spin_unlock(&ifp
->lock
);
2951 read_unlock(&idev
->lock
);
2953 /* send a neighbour solicitation for our addr */
2954 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
2955 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &in6addr_any
);
2960 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
2962 struct net_device
*dev
= ifp
->idev
->dev
;
2965 * Configure the address for reception. Now it is valid.
2968 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2970 /* If added prefix is link local and forwarding is off,
2971 start sending router solicitations.
2974 if ((ifp
->idev
->cnf
.forwarding
== 0 ||
2975 ifp
->idev
->cnf
.forwarding
== 2) &&
2976 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
2977 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
2978 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
2980 * If a host as already performed a random delay
2981 * [...] as part of DAD [...] there is no need
2982 * to delay again before sending the first RS
2984 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &in6addr_linklocal_allrouters
);
2986 spin_lock_bh(&ifp
->lock
);
2988 ifp
->idev
->if_flags
|= IF_RS_SENT
;
2989 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
2990 spin_unlock_bh(&ifp
->lock
);
2994 static void addrconf_dad_run(struct inet6_dev
*idev
)
2996 struct inet6_ifaddr
*ifp
;
2998 read_lock_bh(&idev
->lock
);
2999 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
3000 spin_lock(&ifp
->lock
);
3001 if (ifp
->flags
& IFA_F_TENTATIVE
&&
3002 ifp
->state
== INET6_IFADDR_STATE_DAD
)
3003 addrconf_dad_kick(ifp
);
3004 spin_unlock(&ifp
->lock
);
3006 read_unlock_bh(&idev
->lock
);
3009 #ifdef CONFIG_PROC_FS
3010 struct if6_iter_state
{
3011 struct seq_net_private p
;
3015 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
)
3017 struct inet6_ifaddr
*ifa
= NULL
;
3018 struct if6_iter_state
*state
= seq
->private;
3019 struct net
*net
= seq_file_net(seq
);
3021 for (state
->bucket
= 0; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
3022 struct hlist_node
*n
;
3023 hlist_for_each_entry_rcu_bh(ifa
, n
, &inet6_addr_lst
[state
->bucket
],
3025 if (net_eq(dev_net(ifa
->idev
->dev
), net
))
3031 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
,
3032 struct inet6_ifaddr
*ifa
)
3034 struct if6_iter_state
*state
= seq
->private;
3035 struct net
*net
= seq_file_net(seq
);
3036 struct hlist_node
*n
= &ifa
->addr_lst
;
3038 hlist_for_each_entry_continue_rcu_bh(ifa
, n
, addr_lst
)
3039 if (net_eq(dev_net(ifa
->idev
->dev
), net
))
3042 while (++state
->bucket
< IN6_ADDR_HSIZE
) {
3043 hlist_for_each_entry_rcu_bh(ifa
, n
,
3044 &inet6_addr_lst
[state
->bucket
], addr_lst
) {
3045 if (net_eq(dev_net(ifa
->idev
->dev
), net
))
3053 static struct inet6_ifaddr
*if6_get_idx(struct seq_file
*seq
, loff_t pos
)
3055 struct inet6_ifaddr
*ifa
= if6_get_first(seq
);
3058 while (pos
&& (ifa
= if6_get_next(seq
, ifa
)) != NULL
)
3060 return pos
? NULL
: ifa
;
3063 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
3067 return if6_get_idx(seq
, *pos
);
3070 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
3072 struct inet6_ifaddr
*ifa
;
3074 ifa
= if6_get_next(seq
, v
);
3079 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
3082 rcu_read_unlock_bh();
3085 static int if6_seq_show(struct seq_file
*seq
, void *v
)
3087 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
3088 seq_printf(seq
, "%pi6 %02x %02x %02x %02x %8s\n",
3090 ifp
->idev
->dev
->ifindex
,
3094 ifp
->idev
->dev
->name
);
3098 static const struct seq_operations if6_seq_ops
= {
3099 .start
= if6_seq_start
,
3100 .next
= if6_seq_next
,
3101 .show
= if6_seq_show
,
3102 .stop
= if6_seq_stop
,
3105 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
3107 return seq_open_net(inode
, file
, &if6_seq_ops
,
3108 sizeof(struct if6_iter_state
));
3111 static const struct file_operations if6_fops
= {
3112 .owner
= THIS_MODULE
,
3113 .open
= if6_seq_open
,
3115 .llseek
= seq_lseek
,
3116 .release
= seq_release_net
,
3119 static int __net_init
if6_proc_net_init(struct net
*net
)
3121 if (!proc_net_fops_create(net
, "if_inet6", S_IRUGO
, &if6_fops
))
3126 static void __net_exit
if6_proc_net_exit(struct net
*net
)
3128 proc_net_remove(net
, "if_inet6");
3131 static struct pernet_operations if6_proc_net_ops
= {
3132 .init
= if6_proc_net_init
,
3133 .exit
= if6_proc_net_exit
,
3136 int __init
if6_proc_init(void)
3138 return register_pernet_subsys(&if6_proc_net_ops
);
3141 void if6_proc_exit(void)
3143 unregister_pernet_subsys(&if6_proc_net_ops
);
3145 #endif /* CONFIG_PROC_FS */
3147 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3148 /* Check if address is a home address configured on any interface. */
3149 int ipv6_chk_home_addr(struct net
*net
, const struct in6_addr
*addr
)
3152 struct inet6_ifaddr
*ifp
= NULL
;
3153 struct hlist_node
*n
;
3154 unsigned int hash
= ipv6_addr_hash(addr
);
3157 hlist_for_each_entry_rcu_bh(ifp
, n
, &inet6_addr_lst
[hash
], addr_lst
) {
3158 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
3160 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
3161 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
3166 rcu_read_unlock_bh();
3172 * Periodic address status verification
3175 static void addrconf_verify(unsigned long foo
)
3177 unsigned long now
, next
, next_sec
, next_sched
;
3178 struct inet6_ifaddr
*ifp
;
3179 struct hlist_node
*node
;
3183 spin_lock(&addrconf_verify_lock
);
3185 next
= round_jiffies_up(now
+ ADDR_CHECK_FREQUENCY
);
3187 del_timer(&addr_chk_timer
);
3189 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
3191 hlist_for_each_entry_rcu_bh(ifp
, node
,
3192 &inet6_addr_lst
[i
], addr_lst
) {
3195 if (ifp
->flags
& IFA_F_PERMANENT
)
3198 spin_lock(&ifp
->lock
);
3199 /* We try to batch several events at once. */
3200 age
= (now
- ifp
->tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
3202 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
3203 age
>= ifp
->valid_lft
) {
3204 spin_unlock(&ifp
->lock
);
3208 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
3209 spin_unlock(&ifp
->lock
);
3211 } else if (age
>= ifp
->prefered_lft
) {
3212 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
3215 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
3217 ifp
->flags
|= IFA_F_DEPRECATED
;
3220 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
3221 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
3223 spin_unlock(&ifp
->lock
);
3228 ipv6_ifa_notify(0, ifp
);
3232 #ifdef CONFIG_IPV6_PRIVACY
3233 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
3234 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
3235 unsigned long regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
3236 ifp
->idev
->cnf
.dad_transmits
*
3237 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
3239 if (age
>= ifp
->prefered_lft
- regen_advance
) {
3240 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
3241 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3242 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3243 if (!ifp
->regen_count
&& ifpub
) {
3246 in6_ifa_hold(ifpub
);
3247 spin_unlock(&ifp
->lock
);
3249 spin_lock(&ifpub
->lock
);
3250 ifpub
->regen_count
= 0;
3251 spin_unlock(&ifpub
->lock
);
3252 ipv6_create_tempaddr(ifpub
, ifp
);
3257 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
3258 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
3259 spin_unlock(&ifp
->lock
);
3262 /* ifp->prefered_lft <= ifp->valid_lft */
3263 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3264 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3265 spin_unlock(&ifp
->lock
);
3270 next_sec
= round_jiffies_up(next
);
3273 /* If rounded timeout is accurate enough, accept it. */
3274 if (time_before(next_sec
, next
+ ADDRCONF_TIMER_FUZZ
))
3275 next_sched
= next_sec
;
3277 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
3278 if (time_before(next_sched
, jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
))
3279 next_sched
= jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
;
3281 ADBG((KERN_DEBUG
"now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
3282 now
, next
, next_sec
, next_sched
));
3284 addr_chk_timer
.expires
= next_sched
;
3285 add_timer(&addr_chk_timer
);
3286 spin_unlock(&addrconf_verify_lock
);
3287 rcu_read_unlock_bh();
3290 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
)
3292 struct in6_addr
*pfx
= NULL
;
3295 pfx
= nla_data(addr
);
3298 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
3301 pfx
= nla_data(local
);
3307 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
3308 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
3309 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
3310 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
3314 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3316 struct net
*net
= sock_net(skb
->sk
);
3317 struct ifaddrmsg
*ifm
;
3318 struct nlattr
*tb
[IFA_MAX
+1];
3319 struct in6_addr
*pfx
;
3322 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3326 ifm
= nlmsg_data(nlh
);
3327 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3331 return inet6_addr_del(net
, ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
3334 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u8 ifa_flags
,
3335 u32 prefered_lft
, u32 valid_lft
)
3339 unsigned long timeout
;
3341 if (!valid_lft
|| (prefered_lft
> valid_lft
))
3344 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
3345 if (addrconf_finite_timeout(timeout
)) {
3346 expires
= jiffies_to_clock_t(timeout
* HZ
);
3347 valid_lft
= timeout
;
3348 flags
= RTF_EXPIRES
;
3352 ifa_flags
|= IFA_F_PERMANENT
;
3355 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
3356 if (addrconf_finite_timeout(timeout
)) {
3358 ifa_flags
|= IFA_F_DEPRECATED
;
3359 prefered_lft
= timeout
;
3362 spin_lock_bh(&ifp
->lock
);
3363 ifp
->flags
= (ifp
->flags
& ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
| IFA_F_HOMEADDRESS
)) | ifa_flags
;
3364 ifp
->tstamp
= jiffies
;
3365 ifp
->valid_lft
= valid_lft
;
3366 ifp
->prefered_lft
= prefered_lft
;
3368 spin_unlock_bh(&ifp
->lock
);
3369 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
3370 ipv6_ifa_notify(0, ifp
);
3372 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
3380 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3382 struct net
*net
= sock_net(skb
->sk
);
3383 struct ifaddrmsg
*ifm
;
3384 struct nlattr
*tb
[IFA_MAX
+1];
3385 struct in6_addr
*pfx
;
3386 struct inet6_ifaddr
*ifa
;
3387 struct net_device
*dev
;
3388 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
3392 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3396 ifm
= nlmsg_data(nlh
);
3397 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3401 if (tb
[IFA_CACHEINFO
]) {
3402 struct ifa_cacheinfo
*ci
;
3404 ci
= nla_data(tb
[IFA_CACHEINFO
]);
3405 valid_lft
= ci
->ifa_valid
;
3406 preferred_lft
= ci
->ifa_prefered
;
3408 preferred_lft
= INFINITY_LIFE_TIME
;
3409 valid_lft
= INFINITY_LIFE_TIME
;
3412 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3416 /* We ignore other flags so far. */
3417 ifa_flags
= ifm
->ifa_flags
& (IFA_F_NODAD
| IFA_F_HOMEADDRESS
);
3419 ifa
= ipv6_get_ifaddr(net
, pfx
, dev
, 1);
3422 * It would be best to check for !NLM_F_CREATE here but
3423 * userspace alreay relies on not having to provide this.
3425 return inet6_addr_add(net
, ifm
->ifa_index
, pfx
,
3426 ifm
->ifa_prefixlen
, ifa_flags
,
3427 preferred_lft
, valid_lft
);
3430 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
3431 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
3434 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
3441 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u8 flags
,
3442 u8 scope
, int ifindex
)
3444 struct ifaddrmsg
*ifm
;
3446 ifm
= nlmsg_data(nlh
);
3447 ifm
->ifa_family
= AF_INET6
;
3448 ifm
->ifa_prefixlen
= prefixlen
;
3449 ifm
->ifa_flags
= flags
;
3450 ifm
->ifa_scope
= scope
;
3451 ifm
->ifa_index
= ifindex
;
3454 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
3455 unsigned long tstamp
, u32 preferred
, u32 valid
)
3457 struct ifa_cacheinfo ci
;
3459 ci
.cstamp
= cstamp_delta(cstamp
);
3460 ci
.tstamp
= cstamp_delta(tstamp
);
3461 ci
.ifa_prefered
= preferred
;
3462 ci
.ifa_valid
= valid
;
3464 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
3467 static inline int rt_scope(int ifa_scope
)
3469 if (ifa_scope
& IFA_HOST
)
3470 return RT_SCOPE_HOST
;
3471 else if (ifa_scope
& IFA_LINK
)
3472 return RT_SCOPE_LINK
;
3473 else if (ifa_scope
& IFA_SITE
)
3474 return RT_SCOPE_SITE
;
3476 return RT_SCOPE_UNIVERSE
;
3479 static inline int inet6_ifaddr_msgsize(void)
3481 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
3482 + nla_total_size(16) /* IFA_ADDRESS */
3483 + nla_total_size(sizeof(struct ifa_cacheinfo
));
3486 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
3487 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3489 struct nlmsghdr
*nlh
;
3490 u32 preferred
, valid
;
3492 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3496 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
3497 ifa
->idev
->dev
->ifindex
);
3499 if (!(ifa
->flags
&IFA_F_PERMANENT
)) {
3500 preferred
= ifa
->prefered_lft
;
3501 valid
= ifa
->valid_lft
;
3502 if (preferred
!= INFINITY_LIFE_TIME
) {
3503 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
3504 if (preferred
> tval
)
3508 if (valid
!= INFINITY_LIFE_TIME
) {
3516 preferred
= INFINITY_LIFE_TIME
;
3517 valid
= INFINITY_LIFE_TIME
;
3520 if (nla_put(skb
, IFA_ADDRESS
, 16, &ifa
->addr
) < 0 ||
3521 put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0) {
3522 nlmsg_cancel(skb
, nlh
);
3526 return nlmsg_end(skb
, nlh
);
3529 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
3530 u32 pid
, u32 seq
, int event
, u16 flags
)
3532 struct nlmsghdr
*nlh
;
3533 u8 scope
= RT_SCOPE_UNIVERSE
;
3534 int ifindex
= ifmca
->idev
->dev
->ifindex
;
3536 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
3537 scope
= RT_SCOPE_SITE
;
3539 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3543 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3544 if (nla_put(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
) < 0 ||
3545 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
3546 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3547 nlmsg_cancel(skb
, nlh
);
3551 return nlmsg_end(skb
, nlh
);
3554 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
3555 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3557 struct nlmsghdr
*nlh
;
3558 u8 scope
= RT_SCOPE_UNIVERSE
;
3559 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
3561 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
3562 scope
= RT_SCOPE_SITE
;
3564 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3568 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3569 if (nla_put(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
) < 0 ||
3570 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
3571 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3572 nlmsg_cancel(skb
, nlh
);
3576 return nlmsg_end(skb
, nlh
);
3585 /* called with rcu_read_lock() */
3586 static int in6_dump_addrs(struct inet6_dev
*idev
, struct sk_buff
*skb
,
3587 struct netlink_callback
*cb
, enum addr_type_t type
,
3588 int s_ip_idx
, int *p_ip_idx
)
3590 struct ifmcaddr6
*ifmca
;
3591 struct ifacaddr6
*ifaca
;
3593 int ip_idx
= *p_ip_idx
;
3595 read_lock_bh(&idev
->lock
);
3597 case UNICAST_ADDR
: {
3598 struct inet6_ifaddr
*ifa
;
3600 /* unicast address incl. temp addr */
3601 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
3602 if (++ip_idx
< s_ip_idx
)
3604 err
= inet6_fill_ifaddr(skb
, ifa
,
3605 NETLINK_CB(cb
->skb
).pid
,
3614 case MULTICAST_ADDR
:
3615 /* multicast address */
3616 for (ifmca
= idev
->mc_list
; ifmca
;
3617 ifmca
= ifmca
->next
, ip_idx
++) {
3618 if (ip_idx
< s_ip_idx
)
3620 err
= inet6_fill_ifmcaddr(skb
, ifmca
,
3621 NETLINK_CB(cb
->skb
).pid
,
3630 /* anycast address */
3631 for (ifaca
= idev
->ac_list
; ifaca
;
3632 ifaca
= ifaca
->aca_next
, ip_idx
++) {
3633 if (ip_idx
< s_ip_idx
)
3635 err
= inet6_fill_ifacaddr(skb
, ifaca
,
3636 NETLINK_CB(cb
->skb
).pid
,
3647 read_unlock_bh(&idev
->lock
);
3652 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3653 enum addr_type_t type
)
3655 struct net
*net
= sock_net(skb
->sk
);
3658 int s_idx
, s_ip_idx
;
3659 struct net_device
*dev
;
3660 struct inet6_dev
*idev
;
3661 struct hlist_head
*head
;
3662 struct hlist_node
*node
;
3665 s_idx
= idx
= cb
->args
[1];
3666 s_ip_idx
= ip_idx
= cb
->args
[2];
3669 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
3671 head
= &net
->dev_index_head
[h
];
3672 hlist_for_each_entry_rcu(dev
, node
, head
, index_hlist
) {
3675 if (h
> s_h
|| idx
> s_idx
)
3678 idev
= __in6_dev_get(dev
);
3682 if (in6_dump_addrs(idev
, skb
, cb
, type
,
3683 s_ip_idx
, &ip_idx
) <= 0)
3693 cb
->args
[2] = ip_idx
;
3698 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3700 enum addr_type_t type
= UNICAST_ADDR
;
3702 return inet6_dump_addr(skb
, cb
, type
);
3705 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3707 enum addr_type_t type
= MULTICAST_ADDR
;
3709 return inet6_dump_addr(skb
, cb
, type
);
3713 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3715 enum addr_type_t type
= ANYCAST_ADDR
;
3717 return inet6_dump_addr(skb
, cb
, type
);
3720 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
* nlh
,
3723 struct net
*net
= sock_net(in_skb
->sk
);
3724 struct ifaddrmsg
*ifm
;
3725 struct nlattr
*tb
[IFA_MAX
+1];
3726 struct in6_addr
*addr
= NULL
;
3727 struct net_device
*dev
= NULL
;
3728 struct inet6_ifaddr
*ifa
;
3729 struct sk_buff
*skb
;
3732 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3736 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3742 ifm
= nlmsg_data(nlh
);
3744 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3746 ifa
= ipv6_get_ifaddr(net
, addr
, dev
, 1);
3748 err
= -EADDRNOTAVAIL
;
3752 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
);
3758 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).pid
,
3759 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
3761 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3762 WARN_ON(err
== -EMSGSIZE
);
3766 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).pid
);
3773 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
3775 struct sk_buff
*skb
;
3776 struct net
*net
= dev_net(ifa
->idev
->dev
);
3779 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
3783 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
3785 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3786 WARN_ON(err
== -EMSGSIZE
);
3790 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3794 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
3797 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
3798 __s32
*array
, int bytes
)
3800 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
3802 memset(array
, 0, bytes
);
3803 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
3804 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
3805 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
3806 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
3807 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
3808 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
3809 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
3810 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
3811 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] =
3812 jiffies_to_msecs(cnf
->rtr_solicit_interval
);
3813 array
[DEVCONF_RTR_SOLICIT_DELAY
] =
3814 jiffies_to_msecs(cnf
->rtr_solicit_delay
);
3815 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
3816 #ifdef CONFIG_IPV6_PRIVACY
3817 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
3818 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
3819 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
3820 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
3821 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
3823 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
3824 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
3825 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
3826 #ifdef CONFIG_IPV6_ROUTER_PREF
3827 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
3828 array
[DEVCONF_RTR_PROBE_INTERVAL
] =
3829 jiffies_to_msecs(cnf
->rtr_probe_interval
);
3830 #ifdef CONFIG_IPV6_ROUTE_INFO
3831 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
3834 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
3835 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
3836 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3837 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
3839 #ifdef CONFIG_IPV6_MROUTE
3840 array
[DEVCONF_MC_FORWARDING
] = cnf
->mc_forwarding
;
3842 array
[DEVCONF_DISABLE_IPV6
] = cnf
->disable_ipv6
;
3843 array
[DEVCONF_ACCEPT_DAD
] = cnf
->accept_dad
;
3844 array
[DEVCONF_FORCE_TLLAO
] = cnf
->force_tllao
;
3847 static inline size_t inet6_ifla6_size(void)
3849 return nla_total_size(4) /* IFLA_INET6_FLAGS */
3850 + nla_total_size(sizeof(struct ifla_cacheinfo
))
3851 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
3852 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
3853 + nla_total_size(ICMP6_MIB_MAX
* 8); /* IFLA_INET6_ICMP6STATS */
3856 static inline size_t inet6_if_nlmsg_size(void)
3858 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
3859 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
3860 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
3861 + nla_total_size(4) /* IFLA_MTU */
3862 + nla_total_size(4) /* IFLA_LINK */
3863 + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
3866 static inline void __snmp6_fill_statsdev(u64
*stats
, atomic_long_t
*mib
,
3867 int items
, int bytes
)
3870 int pad
= bytes
- sizeof(u64
) * items
;
3873 /* Use put_unaligned() because stats may not be aligned for u64. */
3874 put_unaligned(items
, &stats
[0]);
3875 for (i
= 1; i
< items
; i
++)
3876 put_unaligned(atomic_long_read(&mib
[i
]), &stats
[i
]);
3878 memset(&stats
[items
], 0, pad
);
3881 static inline void __snmp6_fill_stats64(u64
*stats
, void __percpu
**mib
,
3882 int items
, int bytes
, size_t syncpoff
)
3885 int pad
= bytes
- sizeof(u64
) * items
;
3888 /* Use put_unaligned() because stats may not be aligned for u64. */
3889 put_unaligned(items
, &stats
[0]);
3890 for (i
= 1; i
< items
; i
++)
3891 put_unaligned(snmp_fold_field64(mib
, i
, syncpoff
), &stats
[i
]);
3893 memset(&stats
[items
], 0, pad
);
3896 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
3900 case IFLA_INET6_STATS
:
3901 __snmp6_fill_stats64(stats
, (void __percpu
**)idev
->stats
.ipv6
,
3902 IPSTATS_MIB_MAX
, bytes
, offsetof(struct ipstats_mib
, syncp
));
3904 case IFLA_INET6_ICMP6STATS
:
3905 __snmp6_fill_statsdev(stats
, idev
->stats
.icmpv6dev
->mibs
, ICMP6_MIB_MAX
, bytes
);
3910 static int inet6_fill_ifla6_attrs(struct sk_buff
*skb
, struct inet6_dev
*idev
)
3913 struct ifla_cacheinfo ci
;
3915 NLA_PUT_U32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
);
3917 ci
.max_reasm_len
= IPV6_MAXPLEN
;
3918 ci
.tstamp
= cstamp_delta(idev
->tstamp
);
3919 ci
.reachable_time
= jiffies_to_msecs(idev
->nd_parms
->reachable_time
);
3920 ci
.retrans_time
= jiffies_to_msecs(idev
->nd_parms
->retrans_time
);
3921 NLA_PUT(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
);
3923 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
3925 goto nla_put_failure
;
3926 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
3928 /* XXX - MC not implemented */
3930 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
3932 goto nla_put_failure
;
3933 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
3935 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
3937 goto nla_put_failure
;
3938 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
3946 static size_t inet6_get_link_af_size(const struct net_device
*dev
)
3948 if (!__in6_dev_get(dev
))
3951 return inet6_ifla6_size();
3954 static int inet6_fill_link_af(struct sk_buff
*skb
, const struct net_device
*dev
)
3956 struct inet6_dev
*idev
= __in6_dev_get(dev
);
3961 if (inet6_fill_ifla6_attrs(skb
, idev
) < 0)
3967 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
3968 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3970 struct net_device
*dev
= idev
->dev
;
3971 struct ifinfomsg
*hdr
;
3972 struct nlmsghdr
*nlh
;
3975 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*hdr
), flags
);
3979 hdr
= nlmsg_data(nlh
);
3980 hdr
->ifi_family
= AF_INET6
;
3982 hdr
->ifi_type
= dev
->type
;
3983 hdr
->ifi_index
= dev
->ifindex
;
3984 hdr
->ifi_flags
= dev_get_flags(dev
);
3985 hdr
->ifi_change
= 0;
3987 NLA_PUT_STRING(skb
, IFLA_IFNAME
, dev
->name
);
3990 NLA_PUT(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
);
3992 NLA_PUT_U32(skb
, IFLA_MTU
, dev
->mtu
);
3993 if (dev
->ifindex
!= dev
->iflink
)
3994 NLA_PUT_U32(skb
, IFLA_LINK
, dev
->iflink
);
3996 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
3997 if (protoinfo
== NULL
)
3998 goto nla_put_failure
;
4000 if (inet6_fill_ifla6_attrs(skb
, idev
) < 0)
4001 goto nla_put_failure
;
4003 nla_nest_end(skb
, protoinfo
);
4004 return nlmsg_end(skb
, nlh
);
4007 nlmsg_cancel(skb
, nlh
);
4011 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4013 struct net
*net
= sock_net(skb
->sk
);
4016 struct net_device
*dev
;
4017 struct inet6_dev
*idev
;
4018 struct hlist_head
*head
;
4019 struct hlist_node
*node
;
4022 s_idx
= cb
->args
[1];
4025 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
4027 head
= &net
->dev_index_head
[h
];
4028 hlist_for_each_entry_rcu(dev
, node
, head
, index_hlist
) {
4031 idev
= __in6_dev_get(dev
);
4034 if (inet6_fill_ifinfo(skb
, idev
,
4035 NETLINK_CB(cb
->skb
).pid
,
4037 RTM_NEWLINK
, NLM_F_MULTI
) <= 0)
4051 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
4053 struct sk_buff
*skb
;
4054 struct net
*net
= dev_net(idev
->dev
);
4057 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
4061 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
4063 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
4064 WARN_ON(err
== -EMSGSIZE
);
4068 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFINFO
, NULL
, GFP_ATOMIC
);
4072 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFINFO
, err
);
4075 static inline size_t inet6_prefix_nlmsg_size(void)
4077 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
4078 + nla_total_size(sizeof(struct in6_addr
))
4079 + nla_total_size(sizeof(struct prefix_cacheinfo
));
4082 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
4083 struct prefix_info
*pinfo
, u32 pid
, u32 seq
,
4084 int event
, unsigned int flags
)
4086 struct prefixmsg
*pmsg
;
4087 struct nlmsghdr
*nlh
;
4088 struct prefix_cacheinfo ci
;
4090 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*pmsg
), flags
);
4094 pmsg
= nlmsg_data(nlh
);
4095 pmsg
->prefix_family
= AF_INET6
;
4096 pmsg
->prefix_pad1
= 0;
4097 pmsg
->prefix_pad2
= 0;
4098 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
4099 pmsg
->prefix_len
= pinfo
->prefix_len
;
4100 pmsg
->prefix_type
= pinfo
->type
;
4101 pmsg
->prefix_pad3
= 0;
4102 pmsg
->prefix_flags
= 0;
4104 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
4105 if (pinfo
->autoconf
)
4106 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
4108 NLA_PUT(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
);
4110 ci
.preferred_time
= ntohl(pinfo
->prefered
);
4111 ci
.valid_time
= ntohl(pinfo
->valid
);
4112 NLA_PUT(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
);
4114 return nlmsg_end(skb
, nlh
);
4117 nlmsg_cancel(skb
, nlh
);
4121 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
4122 struct prefix_info
*pinfo
)
4124 struct sk_buff
*skb
;
4125 struct net
*net
= dev_net(idev
->dev
);
4128 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
4132 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
4134 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
4135 WARN_ON(err
== -EMSGSIZE
);
4139 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
4143 rtnl_set_sk_err(net
, RTNLGRP_IPV6_PREFIX
, err
);
4146 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
4148 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
4153 * If the address was optimistic
4154 * we inserted the route at the start of
4155 * our DAD process, so we don't need
4158 if (!(ifp
->rt
->rt6i_node
))
4159 ip6_ins_rt(ifp
->rt
);
4160 if (ifp
->idev
->cnf
.forwarding
)
4161 addrconf_join_anycast(ifp
);
4164 if (ifp
->idev
->cnf
.forwarding
)
4165 addrconf_leave_anycast(ifp
);
4166 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
4167 dst_hold(&ifp
->rt
->dst
);
4169 if (ip6_del_rt(ifp
->rt
))
4170 dst_free(&ifp
->rt
->dst
);
4175 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
4178 if (likely(ifp
->idev
->dead
== 0))
4179 __ipv6_ifa_notify(event
, ifp
);
4180 rcu_read_unlock_bh();
4183 #ifdef CONFIG_SYSCTL
4186 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
,
4187 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4189 int *valp
= ctl
->data
;
4194 ret
= proc_dointvec(ctl
, write
, buffer
, lenp
, ppos
);
4197 ret
= addrconf_fixup_forwarding(ctl
, valp
, val
);
4203 static void dev_disable_change(struct inet6_dev
*idev
)
4205 if (!idev
|| !idev
->dev
)
4208 if (idev
->cnf
.disable_ipv6
)
4209 addrconf_notify(NULL
, NETDEV_DOWN
, idev
->dev
);
4211 addrconf_notify(NULL
, NETDEV_UP
, idev
->dev
);
4214 static void addrconf_disable_change(struct net
*net
, __s32 newf
)
4216 struct net_device
*dev
;
4217 struct inet6_dev
*idev
;
4220 for_each_netdev_rcu(net
, dev
) {
4221 idev
= __in6_dev_get(dev
);
4223 int changed
= (!idev
->cnf
.disable_ipv6
) ^ (!newf
);
4224 idev
->cnf
.disable_ipv6
= newf
;
4226 dev_disable_change(idev
);
4232 static int addrconf_disable_ipv6(struct ctl_table
*table
, int *p
, int old
)
4236 net
= (struct net
*)table
->extra2
;
4238 if (p
== &net
->ipv6
.devconf_dflt
->disable_ipv6
)
4241 if (!rtnl_trylock()) {
4242 /* Restore the original values before restarting */
4244 return restart_syscall();
4247 if (p
== &net
->ipv6
.devconf_all
->disable_ipv6
) {
4248 __s32 newf
= net
->ipv6
.devconf_all
->disable_ipv6
;
4249 net
->ipv6
.devconf_dflt
->disable_ipv6
= newf
;
4250 addrconf_disable_change(net
, newf
);
4251 } else if ((!*p
) ^ (!old
))
4252 dev_disable_change((struct inet6_dev
*)table
->extra1
);
4259 int addrconf_sysctl_disable(ctl_table
*ctl
, int write
,
4260 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4262 int *valp
= ctl
->data
;
4267 ret
= proc_dointvec(ctl
, write
, buffer
, lenp
, ppos
);
4270 ret
= addrconf_disable_ipv6(ctl
, valp
, val
);
4276 static struct addrconf_sysctl_table
4278 struct ctl_table_header
*sysctl_header
;
4279 ctl_table addrconf_vars
[DEVCONF_MAX
+1];
4281 } addrconf_sysctl __read_mostly
= {
4282 .sysctl_header
= NULL
,
4285 .procname
= "forwarding",
4286 .data
= &ipv6_devconf
.forwarding
,
4287 .maxlen
= sizeof(int),
4289 .proc_handler
= addrconf_sysctl_forward
,
4292 .procname
= "hop_limit",
4293 .data
= &ipv6_devconf
.hop_limit
,
4294 .maxlen
= sizeof(int),
4296 .proc_handler
= proc_dointvec
,
4300 .data
= &ipv6_devconf
.mtu6
,
4301 .maxlen
= sizeof(int),
4303 .proc_handler
= proc_dointvec
,
4306 .procname
= "accept_ra",
4307 .data
= &ipv6_devconf
.accept_ra
,
4308 .maxlen
= sizeof(int),
4310 .proc_handler
= proc_dointvec
,
4313 .procname
= "accept_redirects",
4314 .data
= &ipv6_devconf
.accept_redirects
,
4315 .maxlen
= sizeof(int),
4317 .proc_handler
= proc_dointvec
,
4320 .procname
= "autoconf",
4321 .data
= &ipv6_devconf
.autoconf
,
4322 .maxlen
= sizeof(int),
4324 .proc_handler
= proc_dointvec
,
4327 .procname
= "dad_transmits",
4328 .data
= &ipv6_devconf
.dad_transmits
,
4329 .maxlen
= sizeof(int),
4331 .proc_handler
= proc_dointvec
,
4334 .procname
= "router_solicitations",
4335 .data
= &ipv6_devconf
.rtr_solicits
,
4336 .maxlen
= sizeof(int),
4338 .proc_handler
= proc_dointvec
,
4341 .procname
= "router_solicitation_interval",
4342 .data
= &ipv6_devconf
.rtr_solicit_interval
,
4343 .maxlen
= sizeof(int),
4345 .proc_handler
= proc_dointvec_jiffies
,
4348 .procname
= "router_solicitation_delay",
4349 .data
= &ipv6_devconf
.rtr_solicit_delay
,
4350 .maxlen
= sizeof(int),
4352 .proc_handler
= proc_dointvec_jiffies
,
4355 .procname
= "force_mld_version",
4356 .data
= &ipv6_devconf
.force_mld_version
,
4357 .maxlen
= sizeof(int),
4359 .proc_handler
= proc_dointvec
,
4361 #ifdef CONFIG_IPV6_PRIVACY
4363 .procname
= "use_tempaddr",
4364 .data
= &ipv6_devconf
.use_tempaddr
,
4365 .maxlen
= sizeof(int),
4367 .proc_handler
= proc_dointvec
,
4370 .procname
= "temp_valid_lft",
4371 .data
= &ipv6_devconf
.temp_valid_lft
,
4372 .maxlen
= sizeof(int),
4374 .proc_handler
= proc_dointvec
,
4377 .procname
= "temp_prefered_lft",
4378 .data
= &ipv6_devconf
.temp_prefered_lft
,
4379 .maxlen
= sizeof(int),
4381 .proc_handler
= proc_dointvec
,
4384 .procname
= "regen_max_retry",
4385 .data
= &ipv6_devconf
.regen_max_retry
,
4386 .maxlen
= sizeof(int),
4388 .proc_handler
= proc_dointvec
,
4391 .procname
= "max_desync_factor",
4392 .data
= &ipv6_devconf
.max_desync_factor
,
4393 .maxlen
= sizeof(int),
4395 .proc_handler
= proc_dointvec
,
4399 .procname
= "max_addresses",
4400 .data
= &ipv6_devconf
.max_addresses
,
4401 .maxlen
= sizeof(int),
4403 .proc_handler
= proc_dointvec
,
4406 .procname
= "accept_ra_defrtr",
4407 .data
= &ipv6_devconf
.accept_ra_defrtr
,
4408 .maxlen
= sizeof(int),
4410 .proc_handler
= proc_dointvec
,
4413 .procname
= "accept_ra_pinfo",
4414 .data
= &ipv6_devconf
.accept_ra_pinfo
,
4415 .maxlen
= sizeof(int),
4417 .proc_handler
= proc_dointvec
,
4419 #ifdef CONFIG_IPV6_ROUTER_PREF
4421 .procname
= "accept_ra_rtr_pref",
4422 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
4423 .maxlen
= sizeof(int),
4425 .proc_handler
= proc_dointvec
,
4428 .procname
= "router_probe_interval",
4429 .data
= &ipv6_devconf
.rtr_probe_interval
,
4430 .maxlen
= sizeof(int),
4432 .proc_handler
= proc_dointvec_jiffies
,
4434 #ifdef CONFIG_IPV6_ROUTE_INFO
4436 .procname
= "accept_ra_rt_info_max_plen",
4437 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
4438 .maxlen
= sizeof(int),
4440 .proc_handler
= proc_dointvec
,
4445 .procname
= "proxy_ndp",
4446 .data
= &ipv6_devconf
.proxy_ndp
,
4447 .maxlen
= sizeof(int),
4449 .proc_handler
= proc_dointvec
,
4452 .procname
= "accept_source_route",
4453 .data
= &ipv6_devconf
.accept_source_route
,
4454 .maxlen
= sizeof(int),
4456 .proc_handler
= proc_dointvec
,
4458 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4460 .procname
= "optimistic_dad",
4461 .data
= &ipv6_devconf
.optimistic_dad
,
4462 .maxlen
= sizeof(int),
4464 .proc_handler
= proc_dointvec
,
4468 #ifdef CONFIG_IPV6_MROUTE
4470 .procname
= "mc_forwarding",
4471 .data
= &ipv6_devconf
.mc_forwarding
,
4472 .maxlen
= sizeof(int),
4474 .proc_handler
= proc_dointvec
,
4478 .procname
= "disable_ipv6",
4479 .data
= &ipv6_devconf
.disable_ipv6
,
4480 .maxlen
= sizeof(int),
4482 .proc_handler
= addrconf_sysctl_disable
,
4485 .procname
= "accept_dad",
4486 .data
= &ipv6_devconf
.accept_dad
,
4487 .maxlen
= sizeof(int),
4489 .proc_handler
= proc_dointvec
,
4492 .procname
= "force_tllao",
4493 .data
= &ipv6_devconf
.force_tllao
,
4494 .maxlen
= sizeof(int),
4496 .proc_handler
= proc_dointvec
4504 static int __addrconf_sysctl_register(struct net
*net
, char *dev_name
,
4505 struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
4508 struct addrconf_sysctl_table
*t
;
4510 #define ADDRCONF_CTL_PATH_DEV 3
4512 struct ctl_path addrconf_ctl_path
[] = {
4513 { .procname
= "net", },
4514 { .procname
= "ipv6", },
4515 { .procname
= "conf", },
4516 { /* to be set */ },
4521 t
= kmemdup(&addrconf_sysctl
, sizeof(*t
), GFP_KERNEL
);
4525 for (i
= 0; t
->addrconf_vars
[i
].data
; i
++) {
4526 t
->addrconf_vars
[i
].data
+= (char *)p
- (char *)&ipv6_devconf
;
4527 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
4528 t
->addrconf_vars
[i
].extra2
= net
;
4532 * Make a copy of dev_name, because '.procname' is regarded as const
4533 * by sysctl and we wouldn't want anyone to change it under our feet
4534 * (see SIOCSIFNAME).
4536 t
->dev_name
= kstrdup(dev_name
, GFP_KERNEL
);
4540 addrconf_ctl_path
[ADDRCONF_CTL_PATH_DEV
].procname
= t
->dev_name
;
4542 t
->sysctl_header
= register_net_sysctl_table(net
, addrconf_ctl_path
,
4544 if (t
->sysctl_header
== NULL
)
4558 static void __addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
4560 struct addrconf_sysctl_table
*t
;
4562 if (p
->sysctl
== NULL
)
4567 unregister_net_sysctl_table(t
->sysctl_header
);
4572 static void addrconf_sysctl_register(struct inet6_dev
*idev
)
4574 neigh_sysctl_register(idev
->dev
, idev
->nd_parms
, "ipv6",
4575 &ndisc_ifinfo_sysctl_change
);
4576 __addrconf_sysctl_register(dev_net(idev
->dev
), idev
->dev
->name
,
4580 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
4582 __addrconf_sysctl_unregister(&idev
->cnf
);
4583 neigh_sysctl_unregister(idev
->nd_parms
);
4589 static int __net_init
addrconf_init_net(struct net
*net
)
4592 struct ipv6_devconf
*all
, *dflt
;
4595 all
= &ipv6_devconf
;
4596 dflt
= &ipv6_devconf_dflt
;
4598 if (!net_eq(net
, &init_net
)) {
4599 all
= kmemdup(all
, sizeof(ipv6_devconf
), GFP_KERNEL
);
4603 dflt
= kmemdup(dflt
, sizeof(ipv6_devconf_dflt
), GFP_KERNEL
);
4605 goto err_alloc_dflt
;
4607 /* these will be inherited by all namespaces */
4608 dflt
->autoconf
= ipv6_defaults
.autoconf
;
4609 dflt
->disable_ipv6
= ipv6_defaults
.disable_ipv6
;
4612 net
->ipv6
.devconf_all
= all
;
4613 net
->ipv6
.devconf_dflt
= dflt
;
4615 #ifdef CONFIG_SYSCTL
4616 err
= __addrconf_sysctl_register(net
, "all", NULL
, all
);
4620 err
= __addrconf_sysctl_register(net
, "default", NULL
, dflt
);
4626 #ifdef CONFIG_SYSCTL
4628 __addrconf_sysctl_unregister(all
);
4638 static void __net_exit
addrconf_exit_net(struct net
*net
)
4640 #ifdef CONFIG_SYSCTL
4641 __addrconf_sysctl_unregister(net
->ipv6
.devconf_dflt
);
4642 __addrconf_sysctl_unregister(net
->ipv6
.devconf_all
);
4644 if (!net_eq(net
, &init_net
)) {
4645 kfree(net
->ipv6
.devconf_dflt
);
4646 kfree(net
->ipv6
.devconf_all
);
4650 static struct pernet_operations addrconf_ops
= {
4651 .init
= addrconf_init_net
,
4652 .exit
= addrconf_exit_net
,
4659 int register_inet6addr_notifier(struct notifier_block
*nb
)
4661 return atomic_notifier_chain_register(&inet6addr_chain
, nb
);
4663 EXPORT_SYMBOL(register_inet6addr_notifier
);
4665 int unregister_inet6addr_notifier(struct notifier_block
*nb
)
4667 return atomic_notifier_chain_unregister(&inet6addr_chain
, nb
);
4669 EXPORT_SYMBOL(unregister_inet6addr_notifier
);
4671 static struct rtnl_af_ops inet6_ops
= {
4673 .fill_link_af
= inet6_fill_link_af
,
4674 .get_link_af_size
= inet6_get_link_af_size
,
4678 * Init / cleanup code
4681 int __init
addrconf_init(void)
4685 err
= ipv6_addr_label_init();
4687 printk(KERN_CRIT
"IPv6 Addrconf:"
4688 " cannot initialize default policy table: %d.\n", err
);
4692 err
= register_pernet_subsys(&addrconf_ops
);
4696 /* The addrconf netdev notifier requires that loopback_dev
4697 * has it's ipv6 private information allocated and setup
4698 * before it can bring up and give link-local addresses
4699 * to other devices which are up.
4701 * Unfortunately, loopback_dev is not necessarily the first
4702 * entry in the global dev_base list of net devices. In fact,
4703 * it is likely to be the very last entry on that list.
4704 * So this causes the notifier registry below to try and
4705 * give link-local addresses to all devices besides loopback_dev
4706 * first, then loopback_dev, which cases all the non-loopback_dev
4707 * devices to fail to get a link-local address.
4709 * So, as a temporary fix, allocate the ipv6 structure for
4710 * loopback_dev first by hand.
4711 * Longer term, all of the dependencies ipv6 has upon the loopback
4712 * device and it being up should be removed.
4715 if (!ipv6_add_dev(init_net
.loopback_dev
))
4721 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
4722 INIT_HLIST_HEAD(&inet6_addr_lst
[i
]);
4724 register_netdevice_notifier(&ipv6_dev_notf
);
4728 err
= rtnl_af_register(&inet6_ops
);
4732 err
= __rtnl_register(PF_INET6
, RTM_GETLINK
, NULL
, inet6_dump_ifinfo
,
4737 /* Only the first call to __rtnl_register can fail */
4738 __rtnl_register(PF_INET6
, RTM_NEWADDR
, inet6_rtm_newaddr
, NULL
, NULL
);
4739 __rtnl_register(PF_INET6
, RTM_DELADDR
, inet6_rtm_deladdr
, NULL
, NULL
);
4740 __rtnl_register(PF_INET6
, RTM_GETADDR
, inet6_rtm_getaddr
,
4741 inet6_dump_ifaddr
, NULL
);
4742 __rtnl_register(PF_INET6
, RTM_GETMULTICAST
, NULL
,
4743 inet6_dump_ifmcaddr
, NULL
);
4744 __rtnl_register(PF_INET6
, RTM_GETANYCAST
, NULL
,
4745 inet6_dump_ifacaddr
, NULL
);
4747 ipv6_addr_label_rtnl_register();
4751 rtnl_af_unregister(&inet6_ops
);
4753 unregister_netdevice_notifier(&ipv6_dev_notf
);
4755 unregister_pernet_subsys(&addrconf_ops
);
4757 ipv6_addr_label_cleanup();
4762 void addrconf_cleanup(void)
4764 struct net_device
*dev
;
4767 unregister_netdevice_notifier(&ipv6_dev_notf
);
4768 unregister_pernet_subsys(&addrconf_ops
);
4769 ipv6_addr_label_cleanup();
4773 __rtnl_af_unregister(&inet6_ops
);
4775 /* clean dev list */
4776 for_each_netdev(&init_net
, dev
) {
4777 if (__in6_dev_get(dev
) == NULL
)
4779 addrconf_ifdown(dev
, 1);
4781 addrconf_ifdown(init_net
.loopback_dev
, 2);
4786 spin_lock_bh(&addrconf_hash_lock
);
4787 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
4788 WARN_ON(!hlist_empty(&inet6_addr_lst
[i
]));
4789 spin_unlock_bh(&addrconf_hash_lock
);
4791 del_timer(&addr_chk_timer
);