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>
90 #include <linux/export.h>
92 /* Set to 3 to get tracing... */
96 #define ADBG(x) printk x
101 #define INFINITY_LIFE_TIME 0xFFFFFFFF
103 static inline u32
cstamp_delta(unsigned long cstamp
)
105 return (cstamp
- INITIAL_JIFFIES
) * 100UL / HZ
;
108 #define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ/50 : 1)
109 #define ADDRCONF_TIMER_FUZZ (HZ / 4)
110 #define ADDRCONF_TIMER_FUZZ_MAX (HZ)
113 static void addrconf_sysctl_register(struct inet6_dev
*idev
);
114 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
);
116 static inline void addrconf_sysctl_register(struct inet6_dev
*idev
)
120 static inline void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
125 #ifdef CONFIG_IPV6_PRIVACY
126 static int __ipv6_regen_rndid(struct inet6_dev
*idev
);
127 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
128 static void ipv6_regen_rndid(unsigned long data
);
131 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
);
132 static int ipv6_count_addresses(struct inet6_dev
*idev
);
135 * Configured unicast address hash table
137 static struct hlist_head inet6_addr_lst
[IN6_ADDR_HSIZE
];
138 static DEFINE_SPINLOCK(addrconf_hash_lock
);
140 static void addrconf_verify(unsigned long);
142 static DEFINE_TIMER(addr_chk_timer
, addrconf_verify
, 0, 0);
143 static DEFINE_SPINLOCK(addrconf_verify_lock
);
145 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
146 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
148 static void addrconf_type_change(struct net_device
*dev
,
149 unsigned long event
);
150 static int addrconf_ifdown(struct net_device
*dev
, int how
);
152 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
);
153 static void addrconf_dad_timer(unsigned long data
);
154 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
);
155 static void addrconf_dad_run(struct inet6_dev
*idev
);
156 static void addrconf_rs_timer(unsigned long data
);
157 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
158 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
160 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
161 struct prefix_info
*pinfo
);
162 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
163 struct net_device
*dev
);
165 static ATOMIC_NOTIFIER_HEAD(inet6addr_chain
);
167 static struct ipv6_devconf ipv6_devconf __read_mostly
= {
169 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
170 .mtu6
= IPV6_MIN_MTU
,
172 .accept_redirects
= 1,
174 .force_mld_version
= 0,
176 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
177 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
178 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
179 #ifdef CONFIG_IPV6_PRIVACY
181 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
182 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
183 .regen_max_retry
= REGEN_MAX_RETRY
,
184 .max_desync_factor
= MAX_DESYNC_FACTOR
,
186 .max_addresses
= IPV6_MAX_ADDRESSES
,
187 .accept_ra_defrtr
= 1,
188 .accept_ra_pinfo
= 1,
189 #ifdef CONFIG_IPV6_ROUTER_PREF
190 .accept_ra_rtr_pref
= 1,
191 .rtr_probe_interval
= 60 * HZ
,
192 #ifdef CONFIG_IPV6_ROUTE_INFO
193 .accept_ra_rt_info_max_plen
= 0,
197 .accept_source_route
= 0, /* we do not accept RH0 by default. */
202 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly
= {
204 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
205 .mtu6
= IPV6_MIN_MTU
,
207 .accept_redirects
= 1,
210 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
211 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
212 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
213 #ifdef CONFIG_IPV6_PRIVACY
215 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
216 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
217 .regen_max_retry
= REGEN_MAX_RETRY
,
218 .max_desync_factor
= MAX_DESYNC_FACTOR
,
220 .max_addresses
= IPV6_MAX_ADDRESSES
,
221 .accept_ra_defrtr
= 1,
222 .accept_ra_pinfo
= 1,
223 #ifdef CONFIG_IPV6_ROUTER_PREF
224 .accept_ra_rtr_pref
= 1,
225 .rtr_probe_interval
= 60 * HZ
,
226 #ifdef CONFIG_IPV6_ROUTE_INFO
227 .accept_ra_rt_info_max_plen
= 0,
231 .accept_source_route
= 0, /* we do not accept RH0 by default. */
236 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
237 const struct in6_addr in6addr_any
= IN6ADDR_ANY_INIT
;
238 const struct in6_addr in6addr_loopback
= IN6ADDR_LOOPBACK_INIT
;
239 const struct in6_addr in6addr_linklocal_allnodes
= IN6ADDR_LINKLOCAL_ALLNODES_INIT
;
240 const struct in6_addr in6addr_linklocal_allrouters
= IN6ADDR_LINKLOCAL_ALLROUTERS_INIT
;
242 /* Check if a valid qdisc is available */
243 static inline bool addrconf_qdisc_ok(const struct net_device
*dev
)
245 return !qdisc_tx_is_noop(dev
);
248 /* Check if a route is valid prefix route */
249 static inline int addrconf_is_prefix_route(const struct rt6_info
*rt
)
251 return (rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0;
254 static void addrconf_del_timer(struct inet6_ifaddr
*ifp
)
256 if (del_timer(&ifp
->timer
))
260 enum addrconf_timer_t
{
266 static void addrconf_mod_timer(struct inet6_ifaddr
*ifp
,
267 enum addrconf_timer_t what
,
270 if (!del_timer(&ifp
->timer
))
275 ifp
->timer
.function
= addrconf_dad_timer
;
278 ifp
->timer
.function
= addrconf_rs_timer
;
283 ifp
->timer
.expires
= jiffies
+ when
;
284 add_timer(&ifp
->timer
);
287 static int snmp6_alloc_dev(struct inet6_dev
*idev
)
289 if (snmp_mib_init((void __percpu
**)idev
->stats
.ipv6
,
290 sizeof(struct ipstats_mib
),
291 __alignof__(struct ipstats_mib
)) < 0)
293 idev
->stats
.icmpv6dev
= kzalloc(sizeof(struct icmpv6_mib_device
),
295 if (!idev
->stats
.icmpv6dev
)
297 idev
->stats
.icmpv6msgdev
= kzalloc(sizeof(struct icmpv6msg_mib_device
),
299 if (!idev
->stats
.icmpv6msgdev
)
305 kfree(idev
->stats
.icmpv6dev
);
307 snmp_mib_free((void __percpu
**)idev
->stats
.ipv6
);
312 static void snmp6_free_dev(struct inet6_dev
*idev
)
314 kfree(idev
->stats
.icmpv6msgdev
);
315 kfree(idev
->stats
.icmpv6dev
);
316 snmp_mib_free((void __percpu
**)idev
->stats
.ipv6
);
319 /* Nobody refers to this device, we may destroy it. */
321 void in6_dev_finish_destroy(struct inet6_dev
*idev
)
323 struct net_device
*dev
= idev
->dev
;
325 WARN_ON(!list_empty(&idev
->addr_list
));
326 WARN_ON(idev
->mc_list
!= NULL
);
328 #ifdef NET_REFCNT_DEBUG
329 printk(KERN_DEBUG
"in6_dev_finish_destroy: %s\n", dev
? dev
->name
: "NIL");
333 pr_warning("Freeing alive inet6 device %p\n", idev
);
336 snmp6_free_dev(idev
);
337 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
);
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
);
436 /* Join all-router multicast group if forwarding is set */
437 if (ndev
->cnf
.forwarding
&& (dev
->flags
& IFF_MULTICAST
))
438 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
443 static struct inet6_dev
*ipv6_find_idev(struct net_device
*dev
)
445 struct inet6_dev
*idev
;
449 idev
= __in6_dev_get(dev
);
451 idev
= ipv6_add_dev(dev
);
456 if (dev
->flags
&IFF_UP
)
462 static void dev_forward_change(struct inet6_dev
*idev
)
464 struct net_device
*dev
;
465 struct inet6_ifaddr
*ifa
;
470 if (idev
->cnf
.forwarding
)
471 dev_disable_lro(dev
);
472 if (dev
&& (dev
->flags
& IFF_MULTICAST
)) {
473 if (idev
->cnf
.forwarding
)
474 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
476 ipv6_dev_mc_dec(dev
, &in6addr_linklocal_allrouters
);
479 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
480 if (ifa
->flags
&IFA_F_TENTATIVE
)
482 if (idev
->cnf
.forwarding
)
483 addrconf_join_anycast(ifa
);
485 addrconf_leave_anycast(ifa
);
490 static void addrconf_forward_change(struct net
*net
, __s32 newf
)
492 struct net_device
*dev
;
493 struct inet6_dev
*idev
;
496 for_each_netdev_rcu(net
, dev
) {
497 idev
= __in6_dev_get(dev
);
499 int changed
= (!idev
->cnf
.forwarding
) ^ (!newf
);
500 idev
->cnf
.forwarding
= newf
;
502 dev_forward_change(idev
);
508 static int addrconf_fixup_forwarding(struct ctl_table
*table
, int *p
, int newf
)
514 return restart_syscall();
516 net
= (struct net
*)table
->extra2
;
520 if (p
== &net
->ipv6
.devconf_dflt
->forwarding
) {
525 if (p
== &net
->ipv6
.devconf_all
->forwarding
) {
526 net
->ipv6
.devconf_dflt
->forwarding
= newf
;
527 addrconf_forward_change(net
, newf
);
528 } else if ((!newf
) ^ (!old
))
529 dev_forward_change((struct inet6_dev
*)table
->extra1
);
533 rt6_purge_dflt_routers(net
);
538 /* Nobody refers to this ifaddr, destroy it */
539 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
541 WARN_ON(!hlist_unhashed(&ifp
->addr_lst
));
543 #ifdef NET_REFCNT_DEBUG
544 printk(KERN_DEBUG
"inet6_ifa_finish_destroy\n");
547 in6_dev_put(ifp
->idev
);
549 if (del_timer(&ifp
->timer
))
550 pr_notice("Timer is still running, when freeing ifa=%p\n", ifp
);
552 if (ifp
->state
!= INET6_IFADDR_STATE_DEAD
) {
553 pr_warning("Freeing alive inet6 address %p\n", ifp
);
556 dst_release(&ifp
->rt
->dst
);
562 ipv6_link_dev_addr(struct inet6_dev
*idev
, struct inet6_ifaddr
*ifp
)
565 int ifp_scope
= ipv6_addr_src_scope(&ifp
->addr
);
568 * Each device address list is sorted in order of scope -
569 * global before linklocal.
571 list_for_each(p
, &idev
->addr_list
) {
572 struct inet6_ifaddr
*ifa
573 = list_entry(p
, struct inet6_ifaddr
, if_list
);
574 if (ifp_scope
>= ipv6_addr_src_scope(&ifa
->addr
))
578 list_add_tail(&ifp
->if_list
, p
);
581 static u32
ipv6_addr_hash(const struct in6_addr
*addr
)
584 * We perform the hash function over the last 64 bits of the address
585 * This will include the IEEE address token on links that support it.
587 return jhash_2words((__force u32
)addr
->s6_addr32
[2],
588 (__force u32
)addr
->s6_addr32
[3], 0)
589 & (IN6_ADDR_HSIZE
- 1);
592 /* On success it returns ifp with increased reference count */
594 static struct inet6_ifaddr
*
595 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
, int pfxlen
,
596 int scope
, u32 flags
)
598 struct inet6_ifaddr
*ifa
= NULL
;
602 int addr_type
= ipv6_addr_type(addr
);
604 if (addr_type
== IPV6_ADDR_ANY
||
605 addr_type
& IPV6_ADDR_MULTICAST
||
606 (!(idev
->dev
->flags
& IFF_LOOPBACK
) &&
607 addr_type
& IPV6_ADDR_LOOPBACK
))
608 return ERR_PTR(-EADDRNOTAVAIL
);
612 err
= -ENODEV
; /*XXX*/
616 if (idev
->cnf
.disable_ipv6
) {
621 spin_lock(&addrconf_hash_lock
);
623 /* Ignore adding duplicate addresses on an interface */
624 if (ipv6_chk_same_addr(dev_net(idev
->dev
), addr
, idev
->dev
)) {
625 ADBG(("ipv6_add_addr: already assigned\n"));
630 ifa
= kzalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
633 ADBG(("ipv6_add_addr: malloc failed\n"));
638 rt
= addrconf_dst_alloc(idev
, addr
, false);
646 spin_lock_init(&ifa
->lock
);
647 spin_lock_init(&ifa
->state_lock
);
648 init_timer(&ifa
->timer
);
649 INIT_HLIST_NODE(&ifa
->addr_lst
);
650 ifa
->timer
.data
= (unsigned long) ifa
;
652 ifa
->prefix_len
= pfxlen
;
653 ifa
->flags
= flags
| IFA_F_TENTATIVE
;
654 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
663 /* Add to big hash table */
664 hash
= ipv6_addr_hash(addr
);
666 hlist_add_head_rcu(&ifa
->addr_lst
, &inet6_addr_lst
[hash
]);
667 spin_unlock(&addrconf_hash_lock
);
669 write_lock(&idev
->lock
);
670 /* Add to inet6_dev unicast addr list. */
671 ipv6_link_dev_addr(idev
, ifa
);
673 #ifdef CONFIG_IPV6_PRIVACY
674 if (ifa
->flags
&IFA_F_TEMPORARY
) {
675 list_add(&ifa
->tmp_list
, &idev
->tempaddr_list
);
681 write_unlock(&idev
->lock
);
683 rcu_read_unlock_bh();
685 if (likely(err
== 0))
686 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_UP
, ifa
);
694 spin_unlock(&addrconf_hash_lock
);
698 /* This function wants to get referenced ifp and releases it before return */
700 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
702 struct inet6_ifaddr
*ifa
, *ifn
;
703 struct inet6_dev
*idev
= ifp
->idev
;
705 int deleted
= 0, onlink
= 0;
706 unsigned long expires
= jiffies
;
708 spin_lock_bh(&ifp
->state_lock
);
710 ifp
->state
= INET6_IFADDR_STATE_DEAD
;
711 spin_unlock_bh(&ifp
->state_lock
);
713 if (state
== INET6_IFADDR_STATE_DEAD
)
716 spin_lock_bh(&addrconf_hash_lock
);
717 hlist_del_init_rcu(&ifp
->addr_lst
);
718 spin_unlock_bh(&addrconf_hash_lock
);
720 write_lock_bh(&idev
->lock
);
721 #ifdef CONFIG_IPV6_PRIVACY
722 if (ifp
->flags
&IFA_F_TEMPORARY
) {
723 list_del(&ifp
->tmp_list
);
725 in6_ifa_put(ifp
->ifpub
);
732 list_for_each_entry_safe(ifa
, ifn
, &idev
->addr_list
, if_list
) {
734 list_del_init(&ifp
->if_list
);
737 if (!(ifp
->flags
& IFA_F_PERMANENT
) || onlink
> 0)
741 } else if (ifp
->flags
& IFA_F_PERMANENT
) {
742 if (ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
744 if (ifa
->flags
& IFA_F_PERMANENT
) {
749 unsigned long lifetime
;
754 spin_lock(&ifa
->lock
);
756 lifetime
= addrconf_timeout_fixup(ifa
->valid_lft
, HZ
);
758 * Note: Because this address is
759 * not permanent, lifetime <
760 * LONG_MAX / HZ here.
762 if (time_before(expires
,
763 ifa
->tstamp
+ lifetime
* HZ
))
764 expires
= ifa
->tstamp
+ lifetime
* HZ
;
765 spin_unlock(&ifa
->lock
);
770 write_unlock_bh(&idev
->lock
);
772 addrconf_del_timer(ifp
);
774 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
776 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifp
);
779 * Purge or update corresponding prefix
781 * 1) we don't purge prefix here if address was not permanent.
782 * prefix is managed by its own lifetime.
783 * 2) if there're no addresses, delete prefix.
784 * 3) if there're still other permanent address(es),
785 * corresponding prefix is still permanent.
786 * 4) otherwise, update prefix lifetime to the
787 * longest valid lifetime among the corresponding
788 * addresses on the device.
789 * Note: subsequent RA will update lifetime.
793 if ((ifp
->flags
& IFA_F_PERMANENT
) && onlink
< 1) {
794 struct in6_addr prefix
;
796 struct net
*net
= dev_net(ifp
->idev
->dev
);
797 ipv6_addr_prefix(&prefix
, &ifp
->addr
, ifp
->prefix_len
);
798 rt
= rt6_lookup(net
, &prefix
, NULL
, ifp
->idev
->dev
->ifindex
, 1);
800 if (rt
&& addrconf_is_prefix_route(rt
)) {
804 } else if (!(rt
->rt6i_flags
& RTF_EXPIRES
)) {
805 rt
->dst
.expires
= expires
;
806 rt
->rt6i_flags
|= RTF_EXPIRES
;
809 dst_release(&rt
->dst
);
812 /* clean up prefsrc entries */
813 rt6_remove_prefsrc(ifp
);
818 #ifdef CONFIG_IPV6_PRIVACY
819 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
821 struct inet6_dev
*idev
= ifp
->idev
;
822 struct in6_addr addr
, *tmpaddr
;
823 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_tstamp
, age
;
824 unsigned long regen_advance
;
829 unsigned long now
= jiffies
;
831 write_lock(&idev
->lock
);
833 spin_lock_bh(&ift
->lock
);
834 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
835 spin_unlock_bh(&ift
->lock
);
842 if (idev
->cnf
.use_tempaddr
<= 0) {
843 write_unlock(&idev
->lock
);
845 "ipv6_create_tempaddr(): use_tempaddr is disabled.\n");
850 spin_lock_bh(&ifp
->lock
);
851 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
852 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
853 spin_unlock_bh(&ifp
->lock
);
854 write_unlock(&idev
->lock
);
856 "ipv6_create_tempaddr(): regeneration time exceeded. disabled temporary address support.\n");
862 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
863 if (__ipv6_try_regen_rndid(idev
, tmpaddr
) < 0) {
864 spin_unlock_bh(&ifp
->lock
);
865 write_unlock(&idev
->lock
);
867 "ipv6_create_tempaddr(): regeneration of randomized interface id failed.\n");
873 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
874 age
= (now
- ifp
->tstamp
) / HZ
;
875 tmp_valid_lft
= min_t(__u32
,
877 idev
->cnf
.temp_valid_lft
+ age
);
878 tmp_prefered_lft
= min_t(__u32
,
880 idev
->cnf
.temp_prefered_lft
+ age
-
881 idev
->cnf
.max_desync_factor
);
882 tmp_plen
= ifp
->prefix_len
;
883 max_addresses
= idev
->cnf
.max_addresses
;
884 tmp_tstamp
= ifp
->tstamp
;
885 spin_unlock_bh(&ifp
->lock
);
887 regen_advance
= idev
->cnf
.regen_max_retry
*
888 idev
->cnf
.dad_transmits
*
889 idev
->nd_parms
->retrans_time
/ HZ
;
890 write_unlock(&idev
->lock
);
892 /* A temporary address is created only if this calculated Preferred
893 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
894 * an implementation must not create a temporary address with a zero
895 * Preferred Lifetime.
897 if (tmp_prefered_lft
<= regen_advance
) {
904 addr_flags
= IFA_F_TEMPORARY
;
905 /* set in addrconf_prefix_rcv() */
906 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
907 addr_flags
|= IFA_F_OPTIMISTIC
;
909 ift
= !max_addresses
||
910 ipv6_count_addresses(idev
) < max_addresses
?
911 ipv6_add_addr(idev
, &addr
, tmp_plen
,
912 ipv6_addr_type(&addr
)&IPV6_ADDR_SCOPE_MASK
,
914 if (!ift
|| IS_ERR(ift
)) {
918 "ipv6_create_tempaddr(): retry temporary address regeneration.\n");
920 write_lock(&idev
->lock
);
924 spin_lock_bh(&ift
->lock
);
926 ift
->valid_lft
= tmp_valid_lft
;
927 ift
->prefered_lft
= tmp_prefered_lft
;
929 ift
->tstamp
= tmp_tstamp
;
930 spin_unlock_bh(&ift
->lock
);
932 addrconf_dad_start(ift
);
941 * Choose an appropriate source address (RFC3484)
944 IPV6_SADDR_RULE_INIT
= 0,
945 IPV6_SADDR_RULE_LOCAL
,
946 IPV6_SADDR_RULE_SCOPE
,
947 IPV6_SADDR_RULE_PREFERRED
,
948 #ifdef CONFIG_IPV6_MIP6
952 IPV6_SADDR_RULE_LABEL
,
953 #ifdef CONFIG_IPV6_PRIVACY
954 IPV6_SADDR_RULE_PRIVACY
,
956 IPV6_SADDR_RULE_ORCHID
,
957 IPV6_SADDR_RULE_PREFIX
,
961 struct ipv6_saddr_score
{
964 struct inet6_ifaddr
*ifa
;
965 DECLARE_BITMAP(scorebits
, IPV6_SADDR_RULE_MAX
);
970 struct ipv6_saddr_dst
{
971 const struct in6_addr
*addr
;
978 static inline int ipv6_saddr_preferred(int type
)
980 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|IPV6_ADDR_LOOPBACK
))
985 static int ipv6_get_saddr_eval(struct net
*net
,
986 struct ipv6_saddr_score
*score
,
987 struct ipv6_saddr_dst
*dst
,
992 if (i
<= score
->rule
) {
994 case IPV6_SADDR_RULE_SCOPE
:
995 ret
= score
->scopedist
;
997 case IPV6_SADDR_RULE_PREFIX
:
998 ret
= score
->matchlen
;
1001 ret
= !!test_bit(i
, score
->scorebits
);
1007 case IPV6_SADDR_RULE_INIT
:
1008 /* Rule 0: remember if hiscore is not ready yet */
1011 case IPV6_SADDR_RULE_LOCAL
:
1012 /* Rule 1: Prefer same address */
1013 ret
= ipv6_addr_equal(&score
->ifa
->addr
, dst
->addr
);
1015 case IPV6_SADDR_RULE_SCOPE
:
1016 /* Rule 2: Prefer appropriate scope
1021 * ---+--+-+---> scope
1023 * | d is scope of the destination.
1025 * | \ <- smaller scope is better if
1026 * B-15 | \ if scope is enough for destinaion.
1027 * | ret = B - scope (-1 <= scope >= d <= 15).
1029 * |/ <- greater is better
1030 * -C / if scope is not enough for destination.
1031 * /| ret = scope - C (-1 <= d < scope <= 15).
1033 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1034 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1035 * Assume B = 0 and we get C > 29.
1037 ret
= __ipv6_addr_src_scope(score
->addr_type
);
1038 if (ret
>= dst
->scope
)
1041 ret
-= 128; /* 30 is enough */
1042 score
->scopedist
= ret
;
1044 case IPV6_SADDR_RULE_PREFERRED
:
1045 /* Rule 3: Avoid deprecated and optimistic addresses */
1046 ret
= ipv6_saddr_preferred(score
->addr_type
) ||
1047 !(score
->ifa
->flags
& (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
));
1049 #ifdef CONFIG_IPV6_MIP6
1050 case IPV6_SADDR_RULE_HOA
:
1052 /* Rule 4: Prefer home address */
1053 int prefhome
= !(dst
->prefs
& IPV6_PREFER_SRC_COA
);
1054 ret
= !(score
->ifa
->flags
& IFA_F_HOMEADDRESS
) ^ prefhome
;
1058 case IPV6_SADDR_RULE_OIF
:
1059 /* Rule 5: Prefer outgoing interface */
1060 ret
= (!dst
->ifindex
||
1061 dst
->ifindex
== score
->ifa
->idev
->dev
->ifindex
);
1063 case IPV6_SADDR_RULE_LABEL
:
1064 /* Rule 6: Prefer matching label */
1065 ret
= ipv6_addr_label(net
,
1066 &score
->ifa
->addr
, score
->addr_type
,
1067 score
->ifa
->idev
->dev
->ifindex
) == dst
->label
;
1069 #ifdef CONFIG_IPV6_PRIVACY
1070 case IPV6_SADDR_RULE_PRIVACY
:
1072 /* Rule 7: Prefer public address
1073 * Note: prefer temporary address if use_tempaddr >= 2
1075 int preftmp
= dst
->prefs
& (IPV6_PREFER_SRC_PUBLIC
|IPV6_PREFER_SRC_TMP
) ?
1076 !!(dst
->prefs
& IPV6_PREFER_SRC_TMP
) :
1077 score
->ifa
->idev
->cnf
.use_tempaddr
>= 2;
1078 ret
= (!(score
->ifa
->flags
& IFA_F_TEMPORARY
)) ^ preftmp
;
1082 case IPV6_SADDR_RULE_ORCHID
:
1083 /* Rule 8-: Prefer ORCHID vs ORCHID or
1084 * non-ORCHID vs non-ORCHID
1086 ret
= !(ipv6_addr_orchid(&score
->ifa
->addr
) ^
1087 ipv6_addr_orchid(dst
->addr
));
1089 case IPV6_SADDR_RULE_PREFIX
:
1090 /* Rule 8: Use longest matching prefix */
1091 score
->matchlen
= ret
= ipv6_addr_diff(&score
->ifa
->addr
,
1099 __set_bit(i
, score
->scorebits
);
1105 int ipv6_dev_get_saddr(struct net
*net
, struct net_device
*dst_dev
,
1106 const struct in6_addr
*daddr
, unsigned int prefs
,
1107 struct in6_addr
*saddr
)
1109 struct ipv6_saddr_score scores
[2],
1110 *score
= &scores
[0], *hiscore
= &scores
[1];
1111 struct ipv6_saddr_dst dst
;
1112 struct net_device
*dev
;
1115 dst_type
= __ipv6_addr_type(daddr
);
1117 dst
.ifindex
= dst_dev
? dst_dev
->ifindex
: 0;
1118 dst
.scope
= __ipv6_addr_src_scope(dst_type
);
1119 dst
.label
= ipv6_addr_label(net
, daddr
, dst_type
, dst
.ifindex
);
1123 hiscore
->ifa
= NULL
;
1127 for_each_netdev_rcu(net
, dev
) {
1128 struct inet6_dev
*idev
;
1130 /* Candidate Source Address (section 4)
1131 * - multicast and link-local destination address,
1132 * the set of candidate source address MUST only
1133 * include addresses assigned to interfaces
1134 * belonging to the same link as the outgoing
1136 * (- For site-local destination addresses, the
1137 * set of candidate source addresses MUST only
1138 * include addresses assigned to interfaces
1139 * belonging to the same site as the outgoing
1142 if (((dst_type
& IPV6_ADDR_MULTICAST
) ||
1143 dst
.scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
) &&
1144 dst
.ifindex
&& dev
->ifindex
!= dst
.ifindex
)
1147 idev
= __in6_dev_get(dev
);
1151 read_lock_bh(&idev
->lock
);
1152 list_for_each_entry(score
->ifa
, &idev
->addr_list
, if_list
) {
1156 * - Tentative Address (RFC2462 section 5.4)
1157 * - A tentative address is not considered
1158 * "assigned to an interface" in the traditional
1159 * sense, unless it is also flagged as optimistic.
1160 * - Candidate Source Address (section 4)
1161 * - In any case, anycast addresses, multicast
1162 * addresses, and the unspecified address MUST
1163 * NOT be included in a candidate set.
1165 if ((score
->ifa
->flags
& IFA_F_TENTATIVE
) &&
1166 (!(score
->ifa
->flags
& IFA_F_OPTIMISTIC
)))
1169 score
->addr_type
= __ipv6_addr_type(&score
->ifa
->addr
);
1171 if (unlikely(score
->addr_type
== IPV6_ADDR_ANY
||
1172 score
->addr_type
& IPV6_ADDR_MULTICAST
)) {
1173 LIMIT_NETDEBUG(KERN_DEBUG
1174 "ADDRCONF: unspecified / multicast address "
1175 "assigned as unicast address on %s",
1181 bitmap_zero(score
->scorebits
, IPV6_SADDR_RULE_MAX
);
1183 for (i
= 0; i
< IPV6_SADDR_RULE_MAX
; i
++) {
1184 int minihiscore
, miniscore
;
1186 minihiscore
= ipv6_get_saddr_eval(net
, hiscore
, &dst
, i
);
1187 miniscore
= ipv6_get_saddr_eval(net
, score
, &dst
, i
);
1189 if (minihiscore
> miniscore
) {
1190 if (i
== IPV6_SADDR_RULE_SCOPE
&&
1191 score
->scopedist
> 0) {
1194 * each remaining entry
1195 * has too small (not enough)
1196 * scope, because ifa entries
1197 * are sorted by their scope
1203 } else if (minihiscore
< miniscore
) {
1205 in6_ifa_put(hiscore
->ifa
);
1207 in6_ifa_hold(score
->ifa
);
1209 swap(hiscore
, score
);
1211 /* restore our iterator */
1212 score
->ifa
= hiscore
->ifa
;
1219 read_unlock_bh(&idev
->lock
);
1224 return -EADDRNOTAVAIL
;
1226 *saddr
= hiscore
->ifa
->addr
;
1227 in6_ifa_put(hiscore
->ifa
);
1230 EXPORT_SYMBOL(ipv6_dev_get_saddr
);
1232 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1233 unsigned char banned_flags
)
1235 struct inet6_dev
*idev
;
1236 int err
= -EADDRNOTAVAIL
;
1239 idev
= __in6_dev_get(dev
);
1241 struct inet6_ifaddr
*ifp
;
1243 read_lock_bh(&idev
->lock
);
1244 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
1245 if (ifp
->scope
== IFA_LINK
&&
1246 !(ifp
->flags
& banned_flags
)) {
1252 read_unlock_bh(&idev
->lock
);
1258 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1261 struct inet6_ifaddr
*ifp
;
1263 read_lock_bh(&idev
->lock
);
1264 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
)
1266 read_unlock_bh(&idev
->lock
);
1270 int ipv6_chk_addr(struct net
*net
, const struct in6_addr
*addr
,
1271 struct net_device
*dev
, int strict
)
1273 struct inet6_ifaddr
*ifp
;
1274 struct hlist_node
*node
;
1275 unsigned int hash
= ipv6_addr_hash(addr
);
1278 hlist_for_each_entry_rcu(ifp
, node
, &inet6_addr_lst
[hash
], addr_lst
) {
1279 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1281 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1282 !(ifp
->flags
&IFA_F_TENTATIVE
) &&
1283 (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1284 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))) {
1285 rcu_read_unlock_bh();
1290 rcu_read_unlock_bh();
1293 EXPORT_SYMBOL(ipv6_chk_addr
);
1295 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
1296 struct net_device
*dev
)
1298 unsigned int hash
= ipv6_addr_hash(addr
);
1299 struct inet6_ifaddr
*ifp
;
1300 struct hlist_node
*node
;
1302 hlist_for_each_entry(ifp
, node
, &inet6_addr_lst
[hash
], addr_lst
) {
1303 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1305 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1306 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1313 int ipv6_chk_prefix(const struct in6_addr
*addr
, struct net_device
*dev
)
1315 struct inet6_dev
*idev
;
1316 struct inet6_ifaddr
*ifa
;
1321 idev
= __in6_dev_get(dev
);
1323 read_lock_bh(&idev
->lock
);
1324 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
1325 onlink
= ipv6_prefix_equal(addr
, &ifa
->addr
,
1330 read_unlock_bh(&idev
->lock
);
1335 EXPORT_SYMBOL(ipv6_chk_prefix
);
1337 struct inet6_ifaddr
*ipv6_get_ifaddr(struct net
*net
, const struct in6_addr
*addr
,
1338 struct net_device
*dev
, int strict
)
1340 struct inet6_ifaddr
*ifp
, *result
= NULL
;
1341 unsigned int hash
= ipv6_addr_hash(addr
);
1342 struct hlist_node
*node
;
1345 hlist_for_each_entry_rcu_bh(ifp
, node
, &inet6_addr_lst
[hash
], addr_lst
) {
1346 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1348 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1349 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1350 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1357 rcu_read_unlock_bh();
1362 /* Gets referenced address, destroys ifaddr */
1364 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
, int dad_failed
)
1366 if (ifp
->flags
&IFA_F_PERMANENT
) {
1367 spin_lock_bh(&ifp
->lock
);
1368 addrconf_del_timer(ifp
);
1369 ifp
->flags
|= IFA_F_TENTATIVE
;
1371 ifp
->flags
|= IFA_F_DADFAILED
;
1372 spin_unlock_bh(&ifp
->lock
);
1374 ipv6_ifa_notify(0, ifp
);
1376 #ifdef CONFIG_IPV6_PRIVACY
1377 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1378 struct inet6_ifaddr
*ifpub
;
1379 spin_lock_bh(&ifp
->lock
);
1382 in6_ifa_hold(ifpub
);
1383 spin_unlock_bh(&ifp
->lock
);
1384 ipv6_create_tempaddr(ifpub
, ifp
);
1387 spin_unlock_bh(&ifp
->lock
);
1395 static int addrconf_dad_end(struct inet6_ifaddr
*ifp
)
1399 spin_lock(&ifp
->state_lock
);
1400 if (ifp
->state
== INET6_IFADDR_STATE_DAD
) {
1401 ifp
->state
= INET6_IFADDR_STATE_POSTDAD
;
1404 spin_unlock(&ifp
->state_lock
);
1409 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1411 struct inet6_dev
*idev
= ifp
->idev
;
1413 if (addrconf_dad_end(ifp
)) {
1418 if (net_ratelimit())
1419 printk(KERN_INFO
"%s: IPv6 duplicate address %pI6c detected!\n",
1420 ifp
->idev
->dev
->name
, &ifp
->addr
);
1422 if (idev
->cnf
.accept_dad
> 1 && !idev
->cnf
.disable_ipv6
) {
1423 struct in6_addr addr
;
1425 addr
.s6_addr32
[0] = htonl(0xfe800000);
1426 addr
.s6_addr32
[1] = 0;
1428 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) &&
1429 ipv6_addr_equal(&ifp
->addr
, &addr
)) {
1430 /* DAD failed for link-local based on MAC address */
1431 idev
->cnf
.disable_ipv6
= 1;
1433 printk(KERN_INFO
"%s: IPv6 being disabled!\n",
1434 ifp
->idev
->dev
->name
);
1438 addrconf_dad_stop(ifp
, 1);
1441 /* Join to solicited addr multicast group. */
1443 void addrconf_join_solict(struct net_device
*dev
, const struct in6_addr
*addr
)
1445 struct in6_addr maddr
;
1447 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1450 addrconf_addr_solict_mult(addr
, &maddr
);
1451 ipv6_dev_mc_inc(dev
, &maddr
);
1454 void addrconf_leave_solict(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
1456 struct in6_addr maddr
;
1458 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1461 addrconf_addr_solict_mult(addr
, &maddr
);
1462 __ipv6_dev_mc_dec(idev
, &maddr
);
1465 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1467 struct in6_addr addr
;
1468 if (ifp
->prefix_len
== 127) /* RFC 6164 */
1470 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1471 if (ipv6_addr_any(&addr
))
1473 ipv6_dev_ac_inc(ifp
->idev
->dev
, &addr
);
1476 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1478 struct in6_addr addr
;
1479 if (ifp
->prefix_len
== 127) /* RFC 6164 */
1481 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1482 if (ipv6_addr_any(&addr
))
1484 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1487 static int addrconf_ifid_eui48(u8
*eui
, struct net_device
*dev
)
1489 if (dev
->addr_len
!= ETH_ALEN
)
1491 memcpy(eui
, dev
->dev_addr
, 3);
1492 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1495 * The zSeries OSA network cards can be shared among various
1496 * OS instances, but the OSA cards have only one MAC address.
1497 * This leads to duplicate address conflicts in conjunction
1498 * with IPv6 if more than one instance uses the same card.
1500 * The driver for these cards can deliver a unique 16-bit
1501 * identifier for each instance sharing the same card. It is
1502 * placed instead of 0xFFFE in the interface identifier. The
1503 * "u" bit of the interface identifier is not inverted in this
1504 * case. Hence the resulting interface identifier has local
1505 * scope according to RFC2373.
1508 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1509 eui
[4] = dev
->dev_id
& 0xFF;
1518 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
1520 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1521 if (dev
->addr_len
!= ARCNET_ALEN
)
1524 eui
[7] = *(u8
*)dev
->dev_addr
;
1528 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
1530 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1532 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1537 static int __ipv6_isatap_ifid(u8
*eui
, __be32 addr
)
1541 eui
[0] = (ipv4_is_zeronet(addr
) || ipv4_is_private_10(addr
) ||
1542 ipv4_is_loopback(addr
) || ipv4_is_linklocal_169(addr
) ||
1543 ipv4_is_private_172(addr
) || ipv4_is_test_192(addr
) ||
1544 ipv4_is_anycast_6to4(addr
) || ipv4_is_private_192(addr
) ||
1545 ipv4_is_test_198(addr
) || ipv4_is_multicast(addr
) ||
1546 ipv4_is_lbcast(addr
)) ? 0x00 : 0x02;
1550 memcpy(eui
+ 4, &addr
, 4);
1554 static int addrconf_ifid_sit(u8
*eui
, struct net_device
*dev
)
1556 if (dev
->priv_flags
& IFF_ISATAP
)
1557 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
1561 static int addrconf_ifid_gre(u8
*eui
, struct net_device
*dev
)
1563 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
1566 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1568 switch (dev
->type
) {
1571 case ARPHRD_IEEE802_TR
:
1572 return addrconf_ifid_eui48(eui
, dev
);
1574 return addrconf_ifid_arcnet(eui
, dev
);
1575 case ARPHRD_INFINIBAND
:
1576 return addrconf_ifid_infiniband(eui
, dev
);
1578 return addrconf_ifid_sit(eui
, dev
);
1580 return addrconf_ifid_gre(eui
, dev
);
1585 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1588 struct inet6_ifaddr
*ifp
;
1590 read_lock_bh(&idev
->lock
);
1591 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
1592 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1593 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1598 read_unlock_bh(&idev
->lock
);
1602 #ifdef CONFIG_IPV6_PRIVACY
1603 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1604 static int __ipv6_regen_rndid(struct inet6_dev
*idev
)
1607 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
1608 idev
->rndid
[0] &= ~0x02;
1611 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1612 * check if generated address is not inappropriate
1614 * - Reserved subnet anycast (RFC 2526)
1615 * 11111101 11....11 1xxxxxxx
1616 * - ISATAP (RFC4214) 6.1
1617 * 00-00-5E-FE-xx-xx-xx-xx
1619 * - XXX: already assigned to an address on the device
1621 if (idev
->rndid
[0] == 0xfd &&
1622 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1623 (idev
->rndid
[7]&0x80))
1625 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1626 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1628 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1635 static void ipv6_regen_rndid(unsigned long data
)
1637 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1638 unsigned long expires
;
1641 write_lock_bh(&idev
->lock
);
1646 if (__ipv6_regen_rndid(idev
) < 0)
1650 idev
->cnf
.temp_prefered_lft
* HZ
-
1651 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
-
1652 idev
->cnf
.max_desync_factor
* HZ
;
1653 if (time_before(expires
, jiffies
)) {
1655 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1660 if (!mod_timer(&idev
->regen_timer
, expires
))
1664 write_unlock_bh(&idev
->lock
);
1665 rcu_read_unlock_bh();
1669 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
)
1673 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1674 ret
= __ipv6_regen_rndid(idev
);
1684 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1685 unsigned long expires
, u32 flags
)
1687 struct fib6_config cfg
= {
1688 .fc_table
= RT6_TABLE_PREFIX
,
1689 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1690 .fc_ifindex
= dev
->ifindex
,
1691 .fc_expires
= expires
,
1693 .fc_flags
= RTF_UP
| flags
,
1694 .fc_nlinfo
.nl_net
= dev_net(dev
),
1695 .fc_protocol
= RTPROT_KERNEL
,
1700 /* Prevent useless cloning on PtP SIT.
1701 This thing is done here expecting that the whole
1702 class of non-broadcast devices need not cloning.
1704 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1705 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
1706 cfg
.fc_flags
|= RTF_NONEXTHOP
;
1709 ip6_route_add(&cfg
);
1713 static struct rt6_info
*addrconf_get_prefix_route(const struct in6_addr
*pfx
,
1715 const struct net_device
*dev
,
1716 u32 flags
, u32 noflags
)
1718 struct fib6_node
*fn
;
1719 struct rt6_info
*rt
= NULL
;
1720 struct fib6_table
*table
;
1722 table
= fib6_get_table(dev_net(dev
), RT6_TABLE_PREFIX
);
1726 write_lock_bh(&table
->tb6_lock
);
1727 fn
= fib6_locate(&table
->tb6_root
, pfx
, plen
, NULL
, 0);
1730 for (rt
= fn
->leaf
; rt
; rt
= rt
->dst
.rt6_next
) {
1731 if (rt
->dst
.dev
->ifindex
!= dev
->ifindex
)
1733 if ((rt
->rt6i_flags
& flags
) != flags
)
1735 if ((noflags
!= 0) && ((rt
->rt6i_flags
& flags
) != 0))
1741 write_unlock_bh(&table
->tb6_lock
);
1746 /* Create "default" multicast route to the interface */
1748 static void addrconf_add_mroute(struct net_device
*dev
)
1750 struct fib6_config cfg
= {
1751 .fc_table
= RT6_TABLE_LOCAL
,
1752 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1753 .fc_ifindex
= dev
->ifindex
,
1756 .fc_nlinfo
.nl_net
= dev_net(dev
),
1759 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
1761 ip6_route_add(&cfg
);
1764 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1765 static void sit_route_add(struct net_device
*dev
)
1767 struct fib6_config cfg
= {
1768 .fc_table
= RT6_TABLE_MAIN
,
1769 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1770 .fc_ifindex
= dev
->ifindex
,
1772 .fc_flags
= RTF_UP
| RTF_NONEXTHOP
,
1773 .fc_nlinfo
.nl_net
= dev_net(dev
),
1776 /* prefix length - 96 bits "::d.d.d.d" */
1777 ip6_route_add(&cfg
);
1781 static void addrconf_add_lroute(struct net_device
*dev
)
1783 struct in6_addr addr
;
1785 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
1786 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
1789 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
1791 struct inet6_dev
*idev
;
1795 idev
= ipv6_find_idev(dev
);
1797 return ERR_PTR(-ENOBUFS
);
1799 if (idev
->cnf
.disable_ipv6
)
1800 return ERR_PTR(-EACCES
);
1802 /* Add default multicast route */
1803 if (!(dev
->flags
& IFF_LOOPBACK
))
1804 addrconf_add_mroute(dev
);
1806 /* Add link local route */
1807 addrconf_add_lroute(dev
);
1811 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
, bool sllao
)
1813 struct prefix_info
*pinfo
;
1817 struct inet6_dev
*in6_dev
;
1818 struct net
*net
= dev_net(dev
);
1820 pinfo
= (struct prefix_info
*) opt
;
1822 if (len
< sizeof(struct prefix_info
)) {
1823 ADBG(("addrconf: prefix option too short\n"));
1828 * Validation checks ([ADDRCONF], page 19)
1831 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
1833 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
1836 valid_lft
= ntohl(pinfo
->valid
);
1837 prefered_lft
= ntohl(pinfo
->prefered
);
1839 if (prefered_lft
> valid_lft
) {
1840 if (net_ratelimit())
1841 printk(KERN_WARNING
"addrconf: prefix option has invalid lifetime\n");
1845 in6_dev
= in6_dev_get(dev
);
1847 if (in6_dev
== NULL
) {
1848 if (net_ratelimit())
1849 printk(KERN_DEBUG
"addrconf: device %s not configured\n", dev
->name
);
1854 * Two things going on here:
1855 * 1) Add routes for on-link prefixes
1856 * 2) Configure prefixes with the auto flag set
1859 if (pinfo
->onlink
) {
1860 struct rt6_info
*rt
;
1861 unsigned long rt_expires
;
1863 /* Avoid arithmetic overflow. Really, we could
1864 * save rt_expires in seconds, likely valid_lft,
1865 * but it would require division in fib gc, that it
1869 rt_expires
= addrconf_timeout_fixup(valid_lft
, HZ
);
1871 rt_expires
= addrconf_timeout_fixup(valid_lft
, USER_HZ
);
1873 if (addrconf_finite_timeout(rt_expires
))
1876 rt
= addrconf_get_prefix_route(&pinfo
->prefix
,
1879 RTF_ADDRCONF
| RTF_PREFIX_RT
,
1880 RTF_GATEWAY
| RTF_DEFAULT
);
1883 /* Autoconf prefix route */
1884 if (valid_lft
== 0) {
1887 } else if (addrconf_finite_timeout(rt_expires
)) {
1889 rt
->dst
.expires
= jiffies
+ rt_expires
;
1890 rt
->rt6i_flags
|= RTF_EXPIRES
;
1892 rt
->rt6i_flags
&= ~RTF_EXPIRES
;
1893 rt
->dst
.expires
= 0;
1895 } else if (valid_lft
) {
1896 clock_t expires
= 0;
1897 int flags
= RTF_ADDRCONF
| RTF_PREFIX_RT
;
1898 if (addrconf_finite_timeout(rt_expires
)) {
1900 flags
|= RTF_EXPIRES
;
1901 expires
= jiffies_to_clock_t(rt_expires
);
1903 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
1904 dev
, expires
, flags
);
1907 dst_release(&rt
->dst
);
1910 /* Try to figure out our local address for this prefix */
1912 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
1913 struct inet6_ifaddr
*ifp
;
1914 struct in6_addr addr
;
1915 int create
= 0, update_lft
= 0;
1917 if (pinfo
->prefix_len
== 64) {
1918 memcpy(&addr
, &pinfo
->prefix
, 8);
1919 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
1920 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
1921 in6_dev_put(in6_dev
);
1926 if (net_ratelimit())
1927 printk(KERN_DEBUG
"IPv6 addrconf: prefix with wrong length %d\n",
1929 in6_dev_put(in6_dev
);
1934 ifp
= ipv6_get_ifaddr(net
, &addr
, dev
, 1);
1936 if (ifp
== NULL
&& valid_lft
) {
1937 int max_addresses
= in6_dev
->cnf
.max_addresses
;
1940 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1941 if (in6_dev
->cnf
.optimistic_dad
&&
1942 !net
->ipv6
.devconf_all
->forwarding
&& sllao
)
1943 addr_flags
= IFA_F_OPTIMISTIC
;
1946 /* Do not allow to create too much of autoconfigured
1947 * addresses; this would be too easy way to crash kernel.
1949 if (!max_addresses
||
1950 ipv6_count_addresses(in6_dev
) < max_addresses
)
1951 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
1952 addr_type
&IPV6_ADDR_SCOPE_MASK
,
1955 if (!ifp
|| IS_ERR(ifp
)) {
1956 in6_dev_put(in6_dev
);
1960 update_lft
= create
= 1;
1961 ifp
->cstamp
= jiffies
;
1962 addrconf_dad_start(ifp
);
1968 #ifdef CONFIG_IPV6_PRIVACY
1969 struct inet6_ifaddr
*ift
;
1973 /* update lifetime (RFC2462 5.5.3 e) */
1974 spin_lock(&ifp
->lock
);
1976 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
1977 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
1980 if (!update_lft
&& stored_lft
) {
1981 if (valid_lft
> MIN_VALID_LIFETIME
||
1982 valid_lft
> stored_lft
)
1984 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
1985 /* valid_lft <= stored_lft is always true */
1987 * RFC 4862 Section 5.5.3e:
1988 * "Note that the preferred lifetime of
1989 * the corresponding address is always
1990 * reset to the Preferred Lifetime in
1991 * the received Prefix Information
1992 * option, regardless of whether the
1993 * valid lifetime is also reset or
1996 * So if the preferred lifetime in
1997 * this advertisement is different
1998 * than what we have stored, but the
1999 * valid lifetime is invalid, just
2000 * reset prefered_lft.
2002 * We must set the valid lifetime
2003 * to the stored lifetime since we'll
2004 * be updating the timestamp below,
2005 * else we'll set it back to the
2008 if (prefered_lft
!= ifp
->prefered_lft
) {
2009 valid_lft
= stored_lft
;
2013 valid_lft
= MIN_VALID_LIFETIME
;
2014 if (valid_lft
< prefered_lft
)
2015 prefered_lft
= valid_lft
;
2021 ifp
->valid_lft
= valid_lft
;
2022 ifp
->prefered_lft
= prefered_lft
;
2025 ifp
->flags
&= ~IFA_F_DEPRECATED
;
2026 spin_unlock(&ifp
->lock
);
2028 if (!(flags
&IFA_F_TENTATIVE
))
2029 ipv6_ifa_notify(0, ifp
);
2031 spin_unlock(&ifp
->lock
);
2033 #ifdef CONFIG_IPV6_PRIVACY
2034 read_lock_bh(&in6_dev
->lock
);
2035 /* update all temporary addresses in the list */
2036 list_for_each_entry(ift
, &in6_dev
->tempaddr_list
,
2038 int age
, max_valid
, max_prefered
;
2040 if (ifp
!= ift
->ifpub
)
2044 * RFC 4941 section 3.3:
2045 * If a received option will extend the lifetime
2046 * of a public address, the lifetimes of
2047 * temporary addresses should be extended,
2048 * subject to the overall constraint that no
2049 * temporary addresses should ever remain
2050 * "valid" or "preferred" for a time longer than
2051 * (TEMP_VALID_LIFETIME) or
2052 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR),
2055 age
= (now
- ift
->cstamp
) / HZ
;
2056 max_valid
= in6_dev
->cnf
.temp_valid_lft
- age
;
2060 max_prefered
= in6_dev
->cnf
.temp_prefered_lft
-
2061 in6_dev
->cnf
.max_desync_factor
-
2063 if (max_prefered
< 0)
2066 if (valid_lft
> max_valid
)
2067 valid_lft
= max_valid
;
2069 if (prefered_lft
> max_prefered
)
2070 prefered_lft
= max_prefered
;
2072 spin_lock(&ift
->lock
);
2074 ift
->valid_lft
= valid_lft
;
2075 ift
->prefered_lft
= prefered_lft
;
2077 if (prefered_lft
> 0)
2078 ift
->flags
&= ~IFA_F_DEPRECATED
;
2080 spin_unlock(&ift
->lock
);
2081 if (!(flags
&IFA_F_TENTATIVE
))
2082 ipv6_ifa_notify(0, ift
);
2085 if ((create
|| list_empty(&in6_dev
->tempaddr_list
)) && in6_dev
->cnf
.use_tempaddr
> 0) {
2087 * When a new public address is created as
2088 * described in [ADDRCONF], also create a new
2089 * temporary address. Also create a temporary
2090 * address if it's enabled but no temporary
2091 * address currently exists.
2093 read_unlock_bh(&in6_dev
->lock
);
2094 ipv6_create_tempaddr(ifp
, NULL
);
2096 read_unlock_bh(&in6_dev
->lock
);
2103 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
2104 in6_dev_put(in6_dev
);
2108 * Set destination address.
2109 * Special case for SIT interfaces where we create a new "virtual"
2112 int addrconf_set_dstaddr(struct net
*net
, void __user
*arg
)
2114 struct in6_ifreq ireq
;
2115 struct net_device
*dev
;
2121 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2124 dev
= __dev_get_by_index(net
, ireq
.ifr6_ifindex
);
2130 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2131 if (dev
->type
== ARPHRD_SIT
) {
2132 const struct net_device_ops
*ops
= dev
->netdev_ops
;
2134 struct ip_tunnel_parm p
;
2136 err
= -EADDRNOTAVAIL
;
2137 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
2140 memset(&p
, 0, sizeof(p
));
2141 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
2145 p
.iph
.protocol
= IPPROTO_IPV6
;
2147 ifr
.ifr_ifru
.ifru_data
= (__force
void __user
*)&p
;
2149 if (ops
->ndo_do_ioctl
) {
2150 mm_segment_t oldfs
= get_fs();
2153 err
= ops
->ndo_do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
2160 dev
= __dev_get_by_name(net
, p
.name
);
2163 err
= dev_open(dev
);
2174 * Manual configuration of address on an interface
2176 static int inet6_addr_add(struct net
*net
, int ifindex
, const struct in6_addr
*pfx
,
2177 unsigned int plen
, __u8 ifa_flags
, __u32 prefered_lft
,
2180 struct inet6_ifaddr
*ifp
;
2181 struct inet6_dev
*idev
;
2182 struct net_device
*dev
;
2186 unsigned long timeout
;
2193 /* check the lifetime */
2194 if (!valid_lft
|| prefered_lft
> valid_lft
)
2197 dev
= __dev_get_by_index(net
, ifindex
);
2201 idev
= addrconf_add_dev(dev
);
2203 return PTR_ERR(idev
);
2205 scope
= ipv6_addr_scope(pfx
);
2207 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
2208 if (addrconf_finite_timeout(timeout
)) {
2209 expires
= jiffies_to_clock_t(timeout
* HZ
);
2210 valid_lft
= timeout
;
2211 flags
= RTF_EXPIRES
;
2215 ifa_flags
|= IFA_F_PERMANENT
;
2218 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
2219 if (addrconf_finite_timeout(timeout
)) {
2221 ifa_flags
|= IFA_F_DEPRECATED
;
2222 prefered_lft
= timeout
;
2225 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, ifa_flags
);
2228 spin_lock_bh(&ifp
->lock
);
2229 ifp
->valid_lft
= valid_lft
;
2230 ifp
->prefered_lft
= prefered_lft
;
2231 ifp
->tstamp
= jiffies
;
2232 spin_unlock_bh(&ifp
->lock
);
2234 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
2237 * Note that section 3.1 of RFC 4429 indicates
2238 * that the Optimistic flag should not be set for
2239 * manually configured addresses
2241 addrconf_dad_start(ifp
);
2247 return PTR_ERR(ifp
);
2250 static int inet6_addr_del(struct net
*net
, int ifindex
, const struct in6_addr
*pfx
,
2253 struct inet6_ifaddr
*ifp
;
2254 struct inet6_dev
*idev
;
2255 struct net_device
*dev
;
2260 dev
= __dev_get_by_index(net
, ifindex
);
2264 if ((idev
= __in6_dev_get(dev
)) == NULL
)
2267 read_lock_bh(&idev
->lock
);
2268 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
2269 if (ifp
->prefix_len
== plen
&&
2270 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
2272 read_unlock_bh(&idev
->lock
);
2276 /* If the last address is deleted administratively,
2277 disable IPv6 on this interface.
2279 if (list_empty(&idev
->addr_list
))
2280 addrconf_ifdown(idev
->dev
, 1);
2284 read_unlock_bh(&idev
->lock
);
2285 return -EADDRNOTAVAIL
;
2289 int addrconf_add_ifaddr(struct net
*net
, void __user
*arg
)
2291 struct in6_ifreq ireq
;
2294 if (!capable(CAP_NET_ADMIN
))
2297 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2301 err
= inet6_addr_add(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2302 ireq
.ifr6_prefixlen
, IFA_F_PERMANENT
,
2303 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2308 int addrconf_del_ifaddr(struct net
*net
, void __user
*arg
)
2310 struct in6_ifreq ireq
;
2313 if (!capable(CAP_NET_ADMIN
))
2316 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2320 err
= inet6_addr_del(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2321 ireq
.ifr6_prefixlen
);
2326 static void add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
2327 int plen
, int scope
)
2329 struct inet6_ifaddr
*ifp
;
2331 ifp
= ipv6_add_addr(idev
, addr
, plen
, scope
, IFA_F_PERMANENT
);
2333 spin_lock_bh(&ifp
->lock
);
2334 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2335 spin_unlock_bh(&ifp
->lock
);
2336 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2341 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2342 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
2344 struct in6_addr addr
;
2345 struct net_device
*dev
;
2346 struct net
*net
= dev_net(idev
->dev
);
2351 memset(&addr
, 0, sizeof(struct in6_addr
));
2352 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
2354 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
2355 addr
.s6_addr32
[0] = htonl(0xfe800000);
2358 scope
= IPV6_ADDR_COMPATv4
;
2361 if (addr
.s6_addr32
[3]) {
2362 add_addr(idev
, &addr
, 128, scope
);
2366 for_each_netdev(net
, dev
) {
2367 struct in_device
*in_dev
= __in_dev_get_rtnl(dev
);
2368 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
2369 struct in_ifaddr
*ifa
;
2373 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
2376 addr
.s6_addr32
[3] = ifa
->ifa_local
;
2378 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
2380 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
2381 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2385 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2390 add_addr(idev
, &addr
, plen
, flag
);
2397 static void init_loopback(struct net_device
*dev
)
2399 struct inet6_dev
*idev
;
2405 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2406 printk(KERN_DEBUG
"init loopback: add_dev failed\n");
2410 add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
);
2413 static void addrconf_add_linklocal(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
2415 struct inet6_ifaddr
*ifp
;
2416 u32 addr_flags
= IFA_F_PERMANENT
;
2418 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2419 if (idev
->cnf
.optimistic_dad
&&
2420 !dev_net(idev
->dev
)->ipv6
.devconf_all
->forwarding
)
2421 addr_flags
|= IFA_F_OPTIMISTIC
;
2425 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, addr_flags
);
2427 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
2428 addrconf_dad_start(ifp
);
2433 static void addrconf_dev_config(struct net_device
*dev
)
2435 struct in6_addr addr
;
2436 struct inet6_dev
*idev
;
2440 if ((dev
->type
!= ARPHRD_ETHER
) &&
2441 (dev
->type
!= ARPHRD_FDDI
) &&
2442 (dev
->type
!= ARPHRD_IEEE802_TR
) &&
2443 (dev
->type
!= ARPHRD_ARCNET
) &&
2444 (dev
->type
!= ARPHRD_INFINIBAND
)) {
2445 /* Alas, we support only Ethernet autoconfiguration. */
2449 idev
= addrconf_add_dev(dev
);
2453 memset(&addr
, 0, sizeof(struct in6_addr
));
2454 addr
.s6_addr32
[0] = htonl(0xFE800000);
2456 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
2457 addrconf_add_linklocal(idev
, &addr
);
2460 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2461 static void addrconf_sit_config(struct net_device
*dev
)
2463 struct inet6_dev
*idev
;
2468 * Configure the tunnel with one of our IPv4
2469 * addresses... we should configure all of
2470 * our v4 addrs in the tunnel
2473 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2474 printk(KERN_DEBUG
"init sit: add_dev failed\n");
2478 if (dev
->priv_flags
& IFF_ISATAP
) {
2479 struct in6_addr addr
;
2481 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2482 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
2483 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
))
2484 addrconf_add_linklocal(idev
, &addr
);
2488 sit_add_v4_addrs(idev
);
2490 if (dev
->flags
&IFF_POINTOPOINT
) {
2491 addrconf_add_mroute(dev
);
2492 addrconf_add_lroute(dev
);
2498 #if defined(CONFIG_NET_IPGRE) || defined(CONFIG_NET_IPGRE_MODULE)
2499 static void addrconf_gre_config(struct net_device
*dev
)
2501 struct inet6_dev
*idev
;
2502 struct in6_addr addr
;
2504 pr_info("ipv6: addrconf_gre_config(%s)\n", dev
->name
);
2508 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2509 printk(KERN_DEBUG
"init gre: add_dev failed\n");
2513 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2514 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
2516 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
))
2517 addrconf_add_linklocal(idev
, &addr
);
2522 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
2524 struct in6_addr lladdr
;
2526 if (!ipv6_get_lladdr(link_dev
, &lladdr
, IFA_F_TENTATIVE
)) {
2527 addrconf_add_linklocal(idev
, &lladdr
);
2533 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
2535 struct net_device
*link_dev
;
2536 struct net
*net
= dev_net(idev
->dev
);
2538 /* first try to inherit the link-local address from the link device */
2539 if (idev
->dev
->iflink
&&
2540 (link_dev
= __dev_get_by_index(net
, idev
->dev
->iflink
))) {
2541 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2544 /* then try to inherit it from any device */
2545 for_each_netdev(net
, link_dev
) {
2546 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2549 printk(KERN_DEBUG
"init ip6-ip6: add_linklocal failed\n");
2553 * Autoconfigure tunnel with a link-local address so routing protocols,
2554 * DHCPv6, MLD etc. can be run over the virtual link
2557 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
2559 struct inet6_dev
*idev
;
2563 idev
= addrconf_add_dev(dev
);
2565 printk(KERN_DEBUG
"init ip6-ip6: add_dev failed\n");
2568 ip6_tnl_add_linklocal(idev
);
2571 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
2574 struct net_device
*dev
= (struct net_device
*) data
;
2575 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2576 int run_pending
= 0;
2580 case NETDEV_REGISTER
:
2581 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2582 idev
= ipv6_add_dev(dev
);
2584 return notifier_from_errno(-ENOMEM
);
2590 if (dev
->flags
& IFF_SLAVE
)
2593 if (event
== NETDEV_UP
) {
2594 if (!addrconf_qdisc_ok(dev
)) {
2595 /* device is not ready yet. */
2597 "ADDRCONF(NETDEV_UP): %s: "
2598 "link is not ready\n",
2603 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
)
2604 idev
= ipv6_add_dev(dev
);
2607 idev
->if_flags
|= IF_READY
;
2611 if (!addrconf_qdisc_ok(dev
)) {
2612 /* device is still not ready. */
2617 if (idev
->if_flags
& IF_READY
)
2618 /* device is already configured. */
2620 idev
->if_flags
|= IF_READY
;
2624 "ADDRCONF(NETDEV_CHANGE): %s: "
2625 "link becomes ready\n",
2631 switch (dev
->type
) {
2632 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2634 addrconf_sit_config(dev
);
2637 #if defined(CONFIG_NET_IPGRE) || defined(CONFIG_NET_IPGRE_MODULE)
2639 addrconf_gre_config(dev
);
2642 case ARPHRD_TUNNEL6
:
2643 addrconf_ip6_tnl_config(dev
);
2645 case ARPHRD_LOOPBACK
:
2650 addrconf_dev_config(dev
);
2656 addrconf_dad_run(idev
);
2659 * If the MTU changed during the interface down,
2660 * when the interface up, the changed MTU must be
2661 * reflected in the idev as well as routers.
2663 if (idev
->cnf
.mtu6
!= dev
->mtu
&&
2664 dev
->mtu
>= IPV6_MIN_MTU
) {
2665 rt6_mtu_change(dev
, dev
->mtu
);
2666 idev
->cnf
.mtu6
= dev
->mtu
;
2668 idev
->tstamp
= jiffies
;
2669 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2672 * If the changed mtu during down is lower than
2673 * IPV6_MIN_MTU stop IPv6 on this interface.
2675 if (dev
->mtu
< IPV6_MIN_MTU
)
2676 addrconf_ifdown(dev
, 1);
2680 case NETDEV_CHANGEMTU
:
2681 if (idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2682 rt6_mtu_change(dev
, dev
->mtu
);
2683 idev
->cnf
.mtu6
= dev
->mtu
;
2687 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2688 idev
= ipv6_add_dev(dev
);
2694 * MTU falled under IPV6_MIN_MTU.
2695 * Stop IPv6 on this interface.
2699 case NETDEV_UNREGISTER
:
2701 * Remove all addresses from this interface.
2703 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2706 case NETDEV_CHANGENAME
:
2708 snmp6_unregister_dev(idev
);
2709 addrconf_sysctl_unregister(idev
);
2710 addrconf_sysctl_register(idev
);
2711 err
= snmp6_register_dev(idev
);
2713 return notifier_from_errno(err
);
2717 case NETDEV_PRE_TYPE_CHANGE
:
2718 case NETDEV_POST_TYPE_CHANGE
:
2719 addrconf_type_change(dev
, event
);
2727 * addrconf module should be notified of a device going up
2729 static struct notifier_block ipv6_dev_notf
= {
2730 .notifier_call
= addrconf_notify
,
2733 static void addrconf_type_change(struct net_device
*dev
, unsigned long event
)
2735 struct inet6_dev
*idev
;
2738 idev
= __in6_dev_get(dev
);
2740 if (event
== NETDEV_POST_TYPE_CHANGE
)
2741 ipv6_mc_remap(idev
);
2742 else if (event
== NETDEV_PRE_TYPE_CHANGE
)
2743 ipv6_mc_unmap(idev
);
2746 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2748 struct net
*net
= dev_net(dev
);
2749 struct inet6_dev
*idev
;
2750 struct inet6_ifaddr
*ifa
;
2755 rt6_ifdown(net
, dev
);
2756 neigh_ifdown(&nd_tbl
, dev
);
2758 idev
= __in6_dev_get(dev
);
2763 * Step 1: remove reference to ipv6 device from parent device.
2769 /* protected by rtnl_lock */
2770 RCU_INIT_POINTER(dev
->ip6_ptr
, NULL
);
2772 /* Step 1.5: remove snmp6 entry */
2773 snmp6_unregister_dev(idev
);
2777 /* Step 2: clear hash table */
2778 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
2779 struct hlist_head
*h
= &inet6_addr_lst
[i
];
2780 struct hlist_node
*n
;
2782 spin_lock_bh(&addrconf_hash_lock
);
2784 hlist_for_each_entry_rcu(ifa
, n
, h
, addr_lst
) {
2785 if (ifa
->idev
== idev
) {
2786 hlist_del_init_rcu(&ifa
->addr_lst
);
2787 addrconf_del_timer(ifa
);
2791 spin_unlock_bh(&addrconf_hash_lock
);
2794 write_lock_bh(&idev
->lock
);
2796 /* Step 2: clear flags for stateless addrconf */
2798 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
2800 #ifdef CONFIG_IPV6_PRIVACY
2801 if (how
&& del_timer(&idev
->regen_timer
))
2804 /* Step 3: clear tempaddr list */
2805 while (!list_empty(&idev
->tempaddr_list
)) {
2806 ifa
= list_first_entry(&idev
->tempaddr_list
,
2807 struct inet6_ifaddr
, tmp_list
);
2808 list_del(&ifa
->tmp_list
);
2809 write_unlock_bh(&idev
->lock
);
2810 spin_lock_bh(&ifa
->lock
);
2813 in6_ifa_put(ifa
->ifpub
);
2816 spin_unlock_bh(&ifa
->lock
);
2818 write_lock_bh(&idev
->lock
);
2822 while (!list_empty(&idev
->addr_list
)) {
2823 ifa
= list_first_entry(&idev
->addr_list
,
2824 struct inet6_ifaddr
, if_list
);
2825 addrconf_del_timer(ifa
);
2827 list_del(&ifa
->if_list
);
2829 write_unlock_bh(&idev
->lock
);
2831 spin_lock_bh(&ifa
->state_lock
);
2833 ifa
->state
= INET6_IFADDR_STATE_DEAD
;
2834 spin_unlock_bh(&ifa
->state_lock
);
2836 if (state
!= INET6_IFADDR_STATE_DEAD
) {
2837 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
2838 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifa
);
2842 write_lock_bh(&idev
->lock
);
2845 write_unlock_bh(&idev
->lock
);
2847 /* Step 5: Discard multicast list */
2849 ipv6_mc_destroy_dev(idev
);
2853 idev
->tstamp
= jiffies
;
2855 /* Last: Shot the device (if unregistered) */
2857 addrconf_sysctl_unregister(idev
);
2858 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
2859 neigh_ifdown(&nd_tbl
, dev
);
2865 static void addrconf_rs_timer(unsigned long data
)
2867 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2868 struct inet6_dev
*idev
= ifp
->idev
;
2870 read_lock(&idev
->lock
);
2871 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
))
2874 if (idev
->cnf
.forwarding
)
2877 /* Announcement received after solicitation was sent */
2878 if (idev
->if_flags
& IF_RA_RCVD
)
2881 spin_lock(&ifp
->lock
);
2882 if (ifp
->probes
++ < idev
->cnf
.rtr_solicits
) {
2883 /* The wait after the last probe can be shorter */
2884 addrconf_mod_timer(ifp
, AC_RS
,
2885 (ifp
->probes
== idev
->cnf
.rtr_solicits
) ?
2886 idev
->cnf
.rtr_solicit_delay
:
2887 idev
->cnf
.rtr_solicit_interval
);
2888 spin_unlock(&ifp
->lock
);
2890 ndisc_send_rs(idev
->dev
, &ifp
->addr
, &in6addr_linklocal_allrouters
);
2892 spin_unlock(&ifp
->lock
);
2894 * Note: we do not support deprecated "all on-link"
2895 * assumption any longer.
2897 printk(KERN_DEBUG
"%s: no IPv6 routers present\n",
2902 read_unlock(&idev
->lock
);
2907 * Duplicate Address Detection
2909 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
2911 unsigned long rand_num
;
2912 struct inet6_dev
*idev
= ifp
->idev
;
2914 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
2917 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
2919 ifp
->probes
= idev
->cnf
.dad_transmits
;
2920 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
2923 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
)
2925 struct inet6_dev
*idev
= ifp
->idev
;
2926 struct net_device
*dev
= idev
->dev
;
2928 addrconf_join_solict(dev
, &ifp
->addr
);
2930 net_srandom(ifp
->addr
.s6_addr32
[3]);
2932 read_lock_bh(&idev
->lock
);
2933 spin_lock(&ifp
->lock
);
2934 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
)
2937 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
2938 idev
->cnf
.accept_dad
< 1 ||
2939 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
2940 ifp
->flags
& IFA_F_NODAD
) {
2941 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
2942 spin_unlock(&ifp
->lock
);
2943 read_unlock_bh(&idev
->lock
);
2945 addrconf_dad_completed(ifp
);
2949 if (!(idev
->if_flags
& IF_READY
)) {
2950 spin_unlock(&ifp
->lock
);
2951 read_unlock_bh(&idev
->lock
);
2953 * If the device is not ready:
2954 * - keep it tentative if it is a permanent address.
2955 * - otherwise, kill it.
2958 addrconf_dad_stop(ifp
, 0);
2963 * Optimistic nodes can start receiving
2966 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
2967 ip6_ins_rt(ifp
->rt
);
2969 addrconf_dad_kick(ifp
);
2971 spin_unlock(&ifp
->lock
);
2972 read_unlock_bh(&idev
->lock
);
2975 static void addrconf_dad_timer(unsigned long data
)
2977 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2978 struct inet6_dev
*idev
= ifp
->idev
;
2979 struct in6_addr mcaddr
;
2981 if (!ifp
->probes
&& addrconf_dad_end(ifp
))
2984 read_lock(&idev
->lock
);
2985 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
)) {
2986 read_unlock(&idev
->lock
);
2990 spin_lock(&ifp
->lock
);
2991 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
) {
2992 spin_unlock(&ifp
->lock
);
2993 read_unlock(&idev
->lock
);
2997 if (ifp
->probes
== 0) {
2999 * DAD was successful
3002 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
3003 spin_unlock(&ifp
->lock
);
3004 read_unlock(&idev
->lock
);
3006 addrconf_dad_completed(ifp
);
3012 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
3013 spin_unlock(&ifp
->lock
);
3014 read_unlock(&idev
->lock
);
3016 /* send a neighbour solicitation for our addr */
3017 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
3018 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &in6addr_any
);
3023 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
3025 struct net_device
*dev
= ifp
->idev
->dev
;
3028 * Configure the address for reception. Now it is valid.
3031 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
3033 /* If added prefix is link local and we are prepared to process
3034 router advertisements, start sending router solicitations.
3037 if (((ifp
->idev
->cnf
.accept_ra
== 1 && !ifp
->idev
->cnf
.forwarding
) ||
3038 ifp
->idev
->cnf
.accept_ra
== 2) &&
3039 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
3040 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
3041 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
3043 * If a host as already performed a random delay
3044 * [...] as part of DAD [...] there is no need
3045 * to delay again before sending the first RS
3047 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &in6addr_linklocal_allrouters
);
3049 spin_lock_bh(&ifp
->lock
);
3051 ifp
->idev
->if_flags
|= IF_RS_SENT
;
3052 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
3053 spin_unlock_bh(&ifp
->lock
);
3057 static void addrconf_dad_run(struct inet6_dev
*idev
)
3059 struct inet6_ifaddr
*ifp
;
3061 read_lock_bh(&idev
->lock
);
3062 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
3063 spin_lock(&ifp
->lock
);
3064 if (ifp
->flags
& IFA_F_TENTATIVE
&&
3065 ifp
->state
== INET6_IFADDR_STATE_DAD
)
3066 addrconf_dad_kick(ifp
);
3067 spin_unlock(&ifp
->lock
);
3069 read_unlock_bh(&idev
->lock
);
3072 #ifdef CONFIG_PROC_FS
3073 struct if6_iter_state
{
3074 struct seq_net_private p
;
3079 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
, loff_t pos
)
3081 struct inet6_ifaddr
*ifa
= NULL
;
3082 struct if6_iter_state
*state
= seq
->private;
3083 struct net
*net
= seq_file_net(seq
);
3086 /* initial bucket if pos is 0 */
3092 for (; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
3093 struct hlist_node
*n
;
3094 hlist_for_each_entry_rcu_bh(ifa
, n
, &inet6_addr_lst
[state
->bucket
],
3096 /* sync with offset */
3097 if (p
< state
->offset
) {
3102 if (net_eq(dev_net(ifa
->idev
->dev
), net
))
3106 /* prepare for next bucket */
3113 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
,
3114 struct inet6_ifaddr
*ifa
)
3116 struct if6_iter_state
*state
= seq
->private;
3117 struct net
*net
= seq_file_net(seq
);
3118 struct hlist_node
*n
= &ifa
->addr_lst
;
3120 hlist_for_each_entry_continue_rcu_bh(ifa
, n
, addr_lst
) {
3122 if (net_eq(dev_net(ifa
->idev
->dev
), net
))
3126 while (++state
->bucket
< IN6_ADDR_HSIZE
) {
3128 hlist_for_each_entry_rcu_bh(ifa
, n
,
3129 &inet6_addr_lst
[state
->bucket
], addr_lst
) {
3131 if (net_eq(dev_net(ifa
->idev
->dev
), net
))
3139 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
3143 return if6_get_first(seq
, *pos
);
3146 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
3148 struct inet6_ifaddr
*ifa
;
3150 ifa
= if6_get_next(seq
, v
);
3155 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
3158 rcu_read_unlock_bh();
3161 static int if6_seq_show(struct seq_file
*seq
, void *v
)
3163 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
3164 seq_printf(seq
, "%pi6 %02x %02x %02x %02x %8s\n",
3166 ifp
->idev
->dev
->ifindex
,
3170 ifp
->idev
->dev
->name
);
3174 static const struct seq_operations if6_seq_ops
= {
3175 .start
= if6_seq_start
,
3176 .next
= if6_seq_next
,
3177 .show
= if6_seq_show
,
3178 .stop
= if6_seq_stop
,
3181 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
3183 return seq_open_net(inode
, file
, &if6_seq_ops
,
3184 sizeof(struct if6_iter_state
));
3187 static const struct file_operations if6_fops
= {
3188 .owner
= THIS_MODULE
,
3189 .open
= if6_seq_open
,
3191 .llseek
= seq_lseek
,
3192 .release
= seq_release_net
,
3195 static int __net_init
if6_proc_net_init(struct net
*net
)
3197 if (!proc_net_fops_create(net
, "if_inet6", S_IRUGO
, &if6_fops
))
3202 static void __net_exit
if6_proc_net_exit(struct net
*net
)
3204 proc_net_remove(net
, "if_inet6");
3207 static struct pernet_operations if6_proc_net_ops
= {
3208 .init
= if6_proc_net_init
,
3209 .exit
= if6_proc_net_exit
,
3212 int __init
if6_proc_init(void)
3214 return register_pernet_subsys(&if6_proc_net_ops
);
3217 void if6_proc_exit(void)
3219 unregister_pernet_subsys(&if6_proc_net_ops
);
3221 #endif /* CONFIG_PROC_FS */
3223 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3224 /* Check if address is a home address configured on any interface. */
3225 int ipv6_chk_home_addr(struct net
*net
, const struct in6_addr
*addr
)
3228 struct inet6_ifaddr
*ifp
= NULL
;
3229 struct hlist_node
*n
;
3230 unsigned int hash
= ipv6_addr_hash(addr
);
3233 hlist_for_each_entry_rcu_bh(ifp
, n
, &inet6_addr_lst
[hash
], addr_lst
) {
3234 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
3236 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
3237 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
3242 rcu_read_unlock_bh();
3248 * Periodic address status verification
3251 static void addrconf_verify(unsigned long foo
)
3253 unsigned long now
, next
, next_sec
, next_sched
;
3254 struct inet6_ifaddr
*ifp
;
3255 struct hlist_node
*node
;
3259 spin_lock(&addrconf_verify_lock
);
3261 next
= round_jiffies_up(now
+ ADDR_CHECK_FREQUENCY
);
3263 del_timer(&addr_chk_timer
);
3265 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
3267 hlist_for_each_entry_rcu_bh(ifp
, node
,
3268 &inet6_addr_lst
[i
], addr_lst
) {
3271 if (ifp
->flags
& IFA_F_PERMANENT
)
3274 spin_lock(&ifp
->lock
);
3275 /* We try to batch several events at once. */
3276 age
= (now
- ifp
->tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
3278 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
3279 age
>= ifp
->valid_lft
) {
3280 spin_unlock(&ifp
->lock
);
3284 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
3285 spin_unlock(&ifp
->lock
);
3287 } else if (age
>= ifp
->prefered_lft
) {
3288 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
3291 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
3293 ifp
->flags
|= IFA_F_DEPRECATED
;
3296 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
3297 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
3299 spin_unlock(&ifp
->lock
);
3304 ipv6_ifa_notify(0, ifp
);
3308 #ifdef CONFIG_IPV6_PRIVACY
3309 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
3310 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
3311 unsigned long regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
3312 ifp
->idev
->cnf
.dad_transmits
*
3313 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
3315 if (age
>= ifp
->prefered_lft
- regen_advance
) {
3316 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
3317 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3318 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3319 if (!ifp
->regen_count
&& ifpub
) {
3322 in6_ifa_hold(ifpub
);
3323 spin_unlock(&ifp
->lock
);
3325 spin_lock(&ifpub
->lock
);
3326 ifpub
->regen_count
= 0;
3327 spin_unlock(&ifpub
->lock
);
3328 ipv6_create_tempaddr(ifpub
, ifp
);
3333 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
3334 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
3335 spin_unlock(&ifp
->lock
);
3338 /* ifp->prefered_lft <= ifp->valid_lft */
3339 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3340 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3341 spin_unlock(&ifp
->lock
);
3346 next_sec
= round_jiffies_up(next
);
3349 /* If rounded timeout is accurate enough, accept it. */
3350 if (time_before(next_sec
, next
+ ADDRCONF_TIMER_FUZZ
))
3351 next_sched
= next_sec
;
3353 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
3354 if (time_before(next_sched
, jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
))
3355 next_sched
= jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
;
3357 ADBG((KERN_DEBUG
"now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
3358 now
, next
, next_sec
, next_sched
));
3360 addr_chk_timer
.expires
= next_sched
;
3361 add_timer(&addr_chk_timer
);
3362 spin_unlock(&addrconf_verify_lock
);
3363 rcu_read_unlock_bh();
3366 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
)
3368 struct in6_addr
*pfx
= NULL
;
3371 pfx
= nla_data(addr
);
3374 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
3377 pfx
= nla_data(local
);
3383 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
3384 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
3385 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
3386 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
3390 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3392 struct net
*net
= sock_net(skb
->sk
);
3393 struct ifaddrmsg
*ifm
;
3394 struct nlattr
*tb
[IFA_MAX
+1];
3395 struct in6_addr
*pfx
;
3398 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3402 ifm
= nlmsg_data(nlh
);
3403 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3407 return inet6_addr_del(net
, ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
3410 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u8 ifa_flags
,
3411 u32 prefered_lft
, u32 valid_lft
)
3415 unsigned long timeout
;
3417 if (!valid_lft
|| (prefered_lft
> valid_lft
))
3420 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
3421 if (addrconf_finite_timeout(timeout
)) {
3422 expires
= jiffies_to_clock_t(timeout
* HZ
);
3423 valid_lft
= timeout
;
3424 flags
= RTF_EXPIRES
;
3428 ifa_flags
|= IFA_F_PERMANENT
;
3431 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
3432 if (addrconf_finite_timeout(timeout
)) {
3434 ifa_flags
|= IFA_F_DEPRECATED
;
3435 prefered_lft
= timeout
;
3438 spin_lock_bh(&ifp
->lock
);
3439 ifp
->flags
= (ifp
->flags
& ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
| IFA_F_HOMEADDRESS
)) | ifa_flags
;
3440 ifp
->tstamp
= jiffies
;
3441 ifp
->valid_lft
= valid_lft
;
3442 ifp
->prefered_lft
= prefered_lft
;
3444 spin_unlock_bh(&ifp
->lock
);
3445 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
3446 ipv6_ifa_notify(0, ifp
);
3448 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
3456 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3458 struct net
*net
= sock_net(skb
->sk
);
3459 struct ifaddrmsg
*ifm
;
3460 struct nlattr
*tb
[IFA_MAX
+1];
3461 struct in6_addr
*pfx
;
3462 struct inet6_ifaddr
*ifa
;
3463 struct net_device
*dev
;
3464 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
3468 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3472 ifm
= nlmsg_data(nlh
);
3473 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3477 if (tb
[IFA_CACHEINFO
]) {
3478 struct ifa_cacheinfo
*ci
;
3480 ci
= nla_data(tb
[IFA_CACHEINFO
]);
3481 valid_lft
= ci
->ifa_valid
;
3482 preferred_lft
= ci
->ifa_prefered
;
3484 preferred_lft
= INFINITY_LIFE_TIME
;
3485 valid_lft
= INFINITY_LIFE_TIME
;
3488 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3492 /* We ignore other flags so far. */
3493 ifa_flags
= ifm
->ifa_flags
& (IFA_F_NODAD
| IFA_F_HOMEADDRESS
);
3495 ifa
= ipv6_get_ifaddr(net
, pfx
, dev
, 1);
3498 * It would be best to check for !NLM_F_CREATE here but
3499 * userspace alreay relies on not having to provide this.
3501 return inet6_addr_add(net
, ifm
->ifa_index
, pfx
,
3502 ifm
->ifa_prefixlen
, ifa_flags
,
3503 preferred_lft
, valid_lft
);
3506 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
3507 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
3510 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
3517 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u8 flags
,
3518 u8 scope
, int ifindex
)
3520 struct ifaddrmsg
*ifm
;
3522 ifm
= nlmsg_data(nlh
);
3523 ifm
->ifa_family
= AF_INET6
;
3524 ifm
->ifa_prefixlen
= prefixlen
;
3525 ifm
->ifa_flags
= flags
;
3526 ifm
->ifa_scope
= scope
;
3527 ifm
->ifa_index
= ifindex
;
3530 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
3531 unsigned long tstamp
, u32 preferred
, u32 valid
)
3533 struct ifa_cacheinfo ci
;
3535 ci
.cstamp
= cstamp_delta(cstamp
);
3536 ci
.tstamp
= cstamp_delta(tstamp
);
3537 ci
.ifa_prefered
= preferred
;
3538 ci
.ifa_valid
= valid
;
3540 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
3543 static inline int rt_scope(int ifa_scope
)
3545 if (ifa_scope
& IFA_HOST
)
3546 return RT_SCOPE_HOST
;
3547 else if (ifa_scope
& IFA_LINK
)
3548 return RT_SCOPE_LINK
;
3549 else if (ifa_scope
& IFA_SITE
)
3550 return RT_SCOPE_SITE
;
3552 return RT_SCOPE_UNIVERSE
;
3555 static inline int inet6_ifaddr_msgsize(void)
3557 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
3558 + nla_total_size(16) /* IFA_ADDRESS */
3559 + nla_total_size(sizeof(struct ifa_cacheinfo
));
3562 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
3563 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3565 struct nlmsghdr
*nlh
;
3566 u32 preferred
, valid
;
3568 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3572 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
3573 ifa
->idev
->dev
->ifindex
);
3575 if (!(ifa
->flags
&IFA_F_PERMANENT
)) {
3576 preferred
= ifa
->prefered_lft
;
3577 valid
= ifa
->valid_lft
;
3578 if (preferred
!= INFINITY_LIFE_TIME
) {
3579 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
3580 if (preferred
> tval
)
3584 if (valid
!= INFINITY_LIFE_TIME
) {
3592 preferred
= INFINITY_LIFE_TIME
;
3593 valid
= INFINITY_LIFE_TIME
;
3596 if (nla_put(skb
, IFA_ADDRESS
, 16, &ifa
->addr
) < 0 ||
3597 put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0) {
3598 nlmsg_cancel(skb
, nlh
);
3602 return nlmsg_end(skb
, nlh
);
3605 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
3606 u32 pid
, u32 seq
, int event
, u16 flags
)
3608 struct nlmsghdr
*nlh
;
3609 u8 scope
= RT_SCOPE_UNIVERSE
;
3610 int ifindex
= ifmca
->idev
->dev
->ifindex
;
3612 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
3613 scope
= RT_SCOPE_SITE
;
3615 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3619 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3620 if (nla_put(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
) < 0 ||
3621 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
3622 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3623 nlmsg_cancel(skb
, nlh
);
3627 return nlmsg_end(skb
, nlh
);
3630 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
3631 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3633 struct nlmsghdr
*nlh
;
3634 u8 scope
= RT_SCOPE_UNIVERSE
;
3635 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
3637 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
3638 scope
= RT_SCOPE_SITE
;
3640 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3644 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3645 if (nla_put(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
) < 0 ||
3646 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
3647 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3648 nlmsg_cancel(skb
, nlh
);
3652 return nlmsg_end(skb
, nlh
);
3661 /* called with rcu_read_lock() */
3662 static int in6_dump_addrs(struct inet6_dev
*idev
, struct sk_buff
*skb
,
3663 struct netlink_callback
*cb
, enum addr_type_t type
,
3664 int s_ip_idx
, int *p_ip_idx
)
3666 struct ifmcaddr6
*ifmca
;
3667 struct ifacaddr6
*ifaca
;
3669 int ip_idx
= *p_ip_idx
;
3671 read_lock_bh(&idev
->lock
);
3673 case UNICAST_ADDR
: {
3674 struct inet6_ifaddr
*ifa
;
3676 /* unicast address incl. temp addr */
3677 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
3678 if (++ip_idx
< s_ip_idx
)
3680 err
= inet6_fill_ifaddr(skb
, ifa
,
3681 NETLINK_CB(cb
->skb
).pid
,
3690 case MULTICAST_ADDR
:
3691 /* multicast address */
3692 for (ifmca
= idev
->mc_list
; ifmca
;
3693 ifmca
= ifmca
->next
, ip_idx
++) {
3694 if (ip_idx
< s_ip_idx
)
3696 err
= inet6_fill_ifmcaddr(skb
, ifmca
,
3697 NETLINK_CB(cb
->skb
).pid
,
3706 /* anycast address */
3707 for (ifaca
= idev
->ac_list
; ifaca
;
3708 ifaca
= ifaca
->aca_next
, ip_idx
++) {
3709 if (ip_idx
< s_ip_idx
)
3711 err
= inet6_fill_ifacaddr(skb
, ifaca
,
3712 NETLINK_CB(cb
->skb
).pid
,
3723 read_unlock_bh(&idev
->lock
);
3728 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3729 enum addr_type_t type
)
3731 struct net
*net
= sock_net(skb
->sk
);
3734 int s_idx
, s_ip_idx
;
3735 struct net_device
*dev
;
3736 struct inet6_dev
*idev
;
3737 struct hlist_head
*head
;
3738 struct hlist_node
*node
;
3741 s_idx
= idx
= cb
->args
[1];
3742 s_ip_idx
= ip_idx
= cb
->args
[2];
3745 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
3747 head
= &net
->dev_index_head
[h
];
3748 hlist_for_each_entry_rcu(dev
, node
, head
, index_hlist
) {
3751 if (h
> s_h
|| idx
> s_idx
)
3754 idev
= __in6_dev_get(dev
);
3758 if (in6_dump_addrs(idev
, skb
, cb
, type
,
3759 s_ip_idx
, &ip_idx
) <= 0)
3769 cb
->args
[2] = ip_idx
;
3774 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3776 enum addr_type_t type
= UNICAST_ADDR
;
3778 return inet6_dump_addr(skb
, cb
, type
);
3781 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3783 enum addr_type_t type
= MULTICAST_ADDR
;
3785 return inet6_dump_addr(skb
, cb
, type
);
3789 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3791 enum addr_type_t type
= ANYCAST_ADDR
;
3793 return inet6_dump_addr(skb
, cb
, type
);
3796 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
*nlh
,
3799 struct net
*net
= sock_net(in_skb
->sk
);
3800 struct ifaddrmsg
*ifm
;
3801 struct nlattr
*tb
[IFA_MAX
+1];
3802 struct in6_addr
*addr
= NULL
;
3803 struct net_device
*dev
= NULL
;
3804 struct inet6_ifaddr
*ifa
;
3805 struct sk_buff
*skb
;
3808 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3812 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3818 ifm
= nlmsg_data(nlh
);
3820 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3822 ifa
= ipv6_get_ifaddr(net
, addr
, dev
, 1);
3824 err
= -EADDRNOTAVAIL
;
3828 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
);
3834 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).pid
,
3835 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
3837 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3838 WARN_ON(err
== -EMSGSIZE
);
3842 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).pid
);
3849 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
3851 struct sk_buff
*skb
;
3852 struct net
*net
= dev_net(ifa
->idev
->dev
);
3855 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
3859 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
3861 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3862 WARN_ON(err
== -EMSGSIZE
);
3866 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3870 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
3873 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
3874 __s32
*array
, int bytes
)
3876 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
3878 memset(array
, 0, bytes
);
3879 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
3880 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
3881 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
3882 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
3883 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
3884 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
3885 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
3886 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
3887 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] =
3888 jiffies_to_msecs(cnf
->rtr_solicit_interval
);
3889 array
[DEVCONF_RTR_SOLICIT_DELAY
] =
3890 jiffies_to_msecs(cnf
->rtr_solicit_delay
);
3891 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
3892 #ifdef CONFIG_IPV6_PRIVACY
3893 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
3894 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
3895 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
3896 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
3897 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
3899 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
3900 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
3901 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
3902 #ifdef CONFIG_IPV6_ROUTER_PREF
3903 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
3904 array
[DEVCONF_RTR_PROBE_INTERVAL
] =
3905 jiffies_to_msecs(cnf
->rtr_probe_interval
);
3906 #ifdef CONFIG_IPV6_ROUTE_INFO
3907 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
3910 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
3911 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
3912 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3913 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
3915 #ifdef CONFIG_IPV6_MROUTE
3916 array
[DEVCONF_MC_FORWARDING
] = cnf
->mc_forwarding
;
3918 array
[DEVCONF_DISABLE_IPV6
] = cnf
->disable_ipv6
;
3919 array
[DEVCONF_ACCEPT_DAD
] = cnf
->accept_dad
;
3920 array
[DEVCONF_FORCE_TLLAO
] = cnf
->force_tllao
;
3923 static inline size_t inet6_ifla6_size(void)
3925 return nla_total_size(4) /* IFLA_INET6_FLAGS */
3926 + nla_total_size(sizeof(struct ifla_cacheinfo
))
3927 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
3928 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
3929 + nla_total_size(ICMP6_MIB_MAX
* 8); /* IFLA_INET6_ICMP6STATS */
3932 static inline size_t inet6_if_nlmsg_size(void)
3934 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
3935 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
3936 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
3937 + nla_total_size(4) /* IFLA_MTU */
3938 + nla_total_size(4) /* IFLA_LINK */
3939 + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
3942 static inline void __snmp6_fill_statsdev(u64
*stats
, atomic_long_t
*mib
,
3943 int items
, int bytes
)
3946 int pad
= bytes
- sizeof(u64
) * items
;
3949 /* Use put_unaligned() because stats may not be aligned for u64. */
3950 put_unaligned(items
, &stats
[0]);
3951 for (i
= 1; i
< items
; i
++)
3952 put_unaligned(atomic_long_read(&mib
[i
]), &stats
[i
]);
3954 memset(&stats
[items
], 0, pad
);
3957 static inline void __snmp6_fill_stats64(u64
*stats
, void __percpu
**mib
,
3958 int items
, int bytes
, size_t syncpoff
)
3961 int pad
= bytes
- sizeof(u64
) * items
;
3964 /* Use put_unaligned() because stats may not be aligned for u64. */
3965 put_unaligned(items
, &stats
[0]);
3966 for (i
= 1; i
< items
; i
++)
3967 put_unaligned(snmp_fold_field64(mib
, i
, syncpoff
), &stats
[i
]);
3969 memset(&stats
[items
], 0, pad
);
3972 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
3976 case IFLA_INET6_STATS
:
3977 __snmp6_fill_stats64(stats
, (void __percpu
**)idev
->stats
.ipv6
,
3978 IPSTATS_MIB_MAX
, bytes
, offsetof(struct ipstats_mib
, syncp
));
3980 case IFLA_INET6_ICMP6STATS
:
3981 __snmp6_fill_statsdev(stats
, idev
->stats
.icmpv6dev
->mibs
, ICMP6_MIB_MAX
, bytes
);
3986 static int inet6_fill_ifla6_attrs(struct sk_buff
*skb
, struct inet6_dev
*idev
)
3989 struct ifla_cacheinfo ci
;
3991 if (nla_put_u32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
))
3992 goto nla_put_failure
;
3993 ci
.max_reasm_len
= IPV6_MAXPLEN
;
3994 ci
.tstamp
= cstamp_delta(idev
->tstamp
);
3995 ci
.reachable_time
= jiffies_to_msecs(idev
->nd_parms
->reachable_time
);
3996 ci
.retrans_time
= jiffies_to_msecs(idev
->nd_parms
->retrans_time
);
3997 if (nla_put(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
))
3998 goto nla_put_failure
;
3999 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
4001 goto nla_put_failure
;
4002 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
4004 /* XXX - MC not implemented */
4006 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
4008 goto nla_put_failure
;
4009 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
4011 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
4013 goto nla_put_failure
;
4014 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
4022 static size_t inet6_get_link_af_size(const struct net_device
*dev
)
4024 if (!__in6_dev_get(dev
))
4027 return inet6_ifla6_size();
4030 static int inet6_fill_link_af(struct sk_buff
*skb
, const struct net_device
*dev
)
4032 struct inet6_dev
*idev
= __in6_dev_get(dev
);
4037 if (inet6_fill_ifla6_attrs(skb
, idev
) < 0)
4043 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
4044 u32 pid
, u32 seq
, int event
, unsigned int flags
)
4046 struct net_device
*dev
= idev
->dev
;
4047 struct ifinfomsg
*hdr
;
4048 struct nlmsghdr
*nlh
;
4051 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*hdr
), flags
);
4055 hdr
= nlmsg_data(nlh
);
4056 hdr
->ifi_family
= AF_INET6
;
4058 hdr
->ifi_type
= dev
->type
;
4059 hdr
->ifi_index
= dev
->ifindex
;
4060 hdr
->ifi_flags
= dev_get_flags(dev
);
4061 hdr
->ifi_change
= 0;
4063 if (nla_put_string(skb
, IFLA_IFNAME
, dev
->name
) ||
4065 nla_put(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
)) ||
4066 nla_put_u32(skb
, IFLA_MTU
, dev
->mtu
) ||
4067 (dev
->ifindex
!= dev
->iflink
&&
4068 nla_put_u32(skb
, IFLA_LINK
, dev
->iflink
)))
4069 goto nla_put_failure
;
4070 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
4071 if (protoinfo
== NULL
)
4072 goto nla_put_failure
;
4074 if (inet6_fill_ifla6_attrs(skb
, idev
) < 0)
4075 goto nla_put_failure
;
4077 nla_nest_end(skb
, protoinfo
);
4078 return nlmsg_end(skb
, nlh
);
4081 nlmsg_cancel(skb
, nlh
);
4085 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4087 struct net
*net
= sock_net(skb
->sk
);
4090 struct net_device
*dev
;
4091 struct inet6_dev
*idev
;
4092 struct hlist_head
*head
;
4093 struct hlist_node
*node
;
4096 s_idx
= cb
->args
[1];
4099 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
4101 head
= &net
->dev_index_head
[h
];
4102 hlist_for_each_entry_rcu(dev
, node
, head
, index_hlist
) {
4105 idev
= __in6_dev_get(dev
);
4108 if (inet6_fill_ifinfo(skb
, idev
,
4109 NETLINK_CB(cb
->skb
).pid
,
4111 RTM_NEWLINK
, NLM_F_MULTI
) <= 0)
4125 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
4127 struct sk_buff
*skb
;
4128 struct net
*net
= dev_net(idev
->dev
);
4131 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
4135 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
4137 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
4138 WARN_ON(err
== -EMSGSIZE
);
4142 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFINFO
, NULL
, GFP_ATOMIC
);
4146 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFINFO
, err
);
4149 static inline size_t inet6_prefix_nlmsg_size(void)
4151 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
4152 + nla_total_size(sizeof(struct in6_addr
))
4153 + nla_total_size(sizeof(struct prefix_cacheinfo
));
4156 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
4157 struct prefix_info
*pinfo
, u32 pid
, u32 seq
,
4158 int event
, unsigned int flags
)
4160 struct prefixmsg
*pmsg
;
4161 struct nlmsghdr
*nlh
;
4162 struct prefix_cacheinfo ci
;
4164 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*pmsg
), flags
);
4168 pmsg
= nlmsg_data(nlh
);
4169 pmsg
->prefix_family
= AF_INET6
;
4170 pmsg
->prefix_pad1
= 0;
4171 pmsg
->prefix_pad2
= 0;
4172 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
4173 pmsg
->prefix_len
= pinfo
->prefix_len
;
4174 pmsg
->prefix_type
= pinfo
->type
;
4175 pmsg
->prefix_pad3
= 0;
4176 pmsg
->prefix_flags
= 0;
4178 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
4179 if (pinfo
->autoconf
)
4180 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
4182 if (nla_put(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
))
4183 goto nla_put_failure
;
4184 ci
.preferred_time
= ntohl(pinfo
->prefered
);
4185 ci
.valid_time
= ntohl(pinfo
->valid
);
4186 if (nla_put(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
))
4187 goto nla_put_failure
;
4188 return nlmsg_end(skb
, nlh
);
4191 nlmsg_cancel(skb
, nlh
);
4195 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
4196 struct prefix_info
*pinfo
)
4198 struct sk_buff
*skb
;
4199 struct net
*net
= dev_net(idev
->dev
);
4202 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
4206 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
4208 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
4209 WARN_ON(err
== -EMSGSIZE
);
4213 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
4217 rtnl_set_sk_err(net
, RTNLGRP_IPV6_PREFIX
, err
);
4220 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
4222 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
4227 * If the address was optimistic
4228 * we inserted the route at the start of
4229 * our DAD process, so we don't need
4232 if (!(ifp
->rt
->rt6i_node
))
4233 ip6_ins_rt(ifp
->rt
);
4234 if (ifp
->idev
->cnf
.forwarding
)
4235 addrconf_join_anycast(ifp
);
4238 if (ifp
->idev
->cnf
.forwarding
)
4239 addrconf_leave_anycast(ifp
);
4240 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
4241 dst_hold(&ifp
->rt
->dst
);
4243 if (ip6_del_rt(ifp
->rt
))
4244 dst_free(&ifp
->rt
->dst
);
4249 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
4252 if (likely(ifp
->idev
->dead
== 0))
4253 __ipv6_ifa_notify(event
, ifp
);
4254 rcu_read_unlock_bh();
4257 #ifdef CONFIG_SYSCTL
4260 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
,
4261 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4263 int *valp
= ctl
->data
;
4270 * ctl->data points to idev->cnf.forwarding, we should
4271 * not modify it until we get the rtnl lock.
4276 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
4279 ret
= addrconf_fixup_forwarding(ctl
, valp
, val
);
4285 static void dev_disable_change(struct inet6_dev
*idev
)
4287 if (!idev
|| !idev
->dev
)
4290 if (idev
->cnf
.disable_ipv6
)
4291 addrconf_notify(NULL
, NETDEV_DOWN
, idev
->dev
);
4293 addrconf_notify(NULL
, NETDEV_UP
, idev
->dev
);
4296 static void addrconf_disable_change(struct net
*net
, __s32 newf
)
4298 struct net_device
*dev
;
4299 struct inet6_dev
*idev
;
4302 for_each_netdev_rcu(net
, dev
) {
4303 idev
= __in6_dev_get(dev
);
4305 int changed
= (!idev
->cnf
.disable_ipv6
) ^ (!newf
);
4306 idev
->cnf
.disable_ipv6
= newf
;
4308 dev_disable_change(idev
);
4314 static int addrconf_disable_ipv6(struct ctl_table
*table
, int *p
, int newf
)
4319 if (!rtnl_trylock())
4320 return restart_syscall();
4322 net
= (struct net
*)table
->extra2
;
4326 if (p
== &net
->ipv6
.devconf_dflt
->disable_ipv6
) {
4331 if (p
== &net
->ipv6
.devconf_all
->disable_ipv6
) {
4332 net
->ipv6
.devconf_dflt
->disable_ipv6
= newf
;
4333 addrconf_disable_change(net
, newf
);
4334 } else if ((!newf
) ^ (!old
))
4335 dev_disable_change((struct inet6_dev
*)table
->extra1
);
4342 int addrconf_sysctl_disable(ctl_table
*ctl
, int write
,
4343 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4345 int *valp
= ctl
->data
;
4352 * ctl->data points to idev->cnf.disable_ipv6, we should
4353 * not modify it until we get the rtnl lock.
4358 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
4361 ret
= addrconf_disable_ipv6(ctl
, valp
, val
);
4367 static struct addrconf_sysctl_table
4369 struct ctl_table_header
*sysctl_header
;
4370 ctl_table addrconf_vars
[DEVCONF_MAX
+1];
4372 } addrconf_sysctl __read_mostly
= {
4373 .sysctl_header
= NULL
,
4376 .procname
= "forwarding",
4377 .data
= &ipv6_devconf
.forwarding
,
4378 .maxlen
= sizeof(int),
4380 .proc_handler
= addrconf_sysctl_forward
,
4383 .procname
= "hop_limit",
4384 .data
= &ipv6_devconf
.hop_limit
,
4385 .maxlen
= sizeof(int),
4387 .proc_handler
= proc_dointvec
,
4391 .data
= &ipv6_devconf
.mtu6
,
4392 .maxlen
= sizeof(int),
4394 .proc_handler
= proc_dointvec
,
4397 .procname
= "accept_ra",
4398 .data
= &ipv6_devconf
.accept_ra
,
4399 .maxlen
= sizeof(int),
4401 .proc_handler
= proc_dointvec
,
4404 .procname
= "accept_redirects",
4405 .data
= &ipv6_devconf
.accept_redirects
,
4406 .maxlen
= sizeof(int),
4408 .proc_handler
= proc_dointvec
,
4411 .procname
= "autoconf",
4412 .data
= &ipv6_devconf
.autoconf
,
4413 .maxlen
= sizeof(int),
4415 .proc_handler
= proc_dointvec
,
4418 .procname
= "dad_transmits",
4419 .data
= &ipv6_devconf
.dad_transmits
,
4420 .maxlen
= sizeof(int),
4422 .proc_handler
= proc_dointvec
,
4425 .procname
= "router_solicitations",
4426 .data
= &ipv6_devconf
.rtr_solicits
,
4427 .maxlen
= sizeof(int),
4429 .proc_handler
= proc_dointvec
,
4432 .procname
= "router_solicitation_interval",
4433 .data
= &ipv6_devconf
.rtr_solicit_interval
,
4434 .maxlen
= sizeof(int),
4436 .proc_handler
= proc_dointvec_jiffies
,
4439 .procname
= "router_solicitation_delay",
4440 .data
= &ipv6_devconf
.rtr_solicit_delay
,
4441 .maxlen
= sizeof(int),
4443 .proc_handler
= proc_dointvec_jiffies
,
4446 .procname
= "force_mld_version",
4447 .data
= &ipv6_devconf
.force_mld_version
,
4448 .maxlen
= sizeof(int),
4450 .proc_handler
= proc_dointvec
,
4452 #ifdef CONFIG_IPV6_PRIVACY
4454 .procname
= "use_tempaddr",
4455 .data
= &ipv6_devconf
.use_tempaddr
,
4456 .maxlen
= sizeof(int),
4458 .proc_handler
= proc_dointvec
,
4461 .procname
= "temp_valid_lft",
4462 .data
= &ipv6_devconf
.temp_valid_lft
,
4463 .maxlen
= sizeof(int),
4465 .proc_handler
= proc_dointvec
,
4468 .procname
= "temp_prefered_lft",
4469 .data
= &ipv6_devconf
.temp_prefered_lft
,
4470 .maxlen
= sizeof(int),
4472 .proc_handler
= proc_dointvec
,
4475 .procname
= "regen_max_retry",
4476 .data
= &ipv6_devconf
.regen_max_retry
,
4477 .maxlen
= sizeof(int),
4479 .proc_handler
= proc_dointvec
,
4482 .procname
= "max_desync_factor",
4483 .data
= &ipv6_devconf
.max_desync_factor
,
4484 .maxlen
= sizeof(int),
4486 .proc_handler
= proc_dointvec
,
4490 .procname
= "max_addresses",
4491 .data
= &ipv6_devconf
.max_addresses
,
4492 .maxlen
= sizeof(int),
4494 .proc_handler
= proc_dointvec
,
4497 .procname
= "accept_ra_defrtr",
4498 .data
= &ipv6_devconf
.accept_ra_defrtr
,
4499 .maxlen
= sizeof(int),
4501 .proc_handler
= proc_dointvec
,
4504 .procname
= "accept_ra_pinfo",
4505 .data
= &ipv6_devconf
.accept_ra_pinfo
,
4506 .maxlen
= sizeof(int),
4508 .proc_handler
= proc_dointvec
,
4510 #ifdef CONFIG_IPV6_ROUTER_PREF
4512 .procname
= "accept_ra_rtr_pref",
4513 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
4514 .maxlen
= sizeof(int),
4516 .proc_handler
= proc_dointvec
,
4519 .procname
= "router_probe_interval",
4520 .data
= &ipv6_devconf
.rtr_probe_interval
,
4521 .maxlen
= sizeof(int),
4523 .proc_handler
= proc_dointvec_jiffies
,
4525 #ifdef CONFIG_IPV6_ROUTE_INFO
4527 .procname
= "accept_ra_rt_info_max_plen",
4528 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
4529 .maxlen
= sizeof(int),
4531 .proc_handler
= proc_dointvec
,
4536 .procname
= "proxy_ndp",
4537 .data
= &ipv6_devconf
.proxy_ndp
,
4538 .maxlen
= sizeof(int),
4540 .proc_handler
= proc_dointvec
,
4543 .procname
= "accept_source_route",
4544 .data
= &ipv6_devconf
.accept_source_route
,
4545 .maxlen
= sizeof(int),
4547 .proc_handler
= proc_dointvec
,
4549 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4551 .procname
= "optimistic_dad",
4552 .data
= &ipv6_devconf
.optimistic_dad
,
4553 .maxlen
= sizeof(int),
4555 .proc_handler
= proc_dointvec
,
4559 #ifdef CONFIG_IPV6_MROUTE
4561 .procname
= "mc_forwarding",
4562 .data
= &ipv6_devconf
.mc_forwarding
,
4563 .maxlen
= sizeof(int),
4565 .proc_handler
= proc_dointvec
,
4569 .procname
= "disable_ipv6",
4570 .data
= &ipv6_devconf
.disable_ipv6
,
4571 .maxlen
= sizeof(int),
4573 .proc_handler
= addrconf_sysctl_disable
,
4576 .procname
= "accept_dad",
4577 .data
= &ipv6_devconf
.accept_dad
,
4578 .maxlen
= sizeof(int),
4580 .proc_handler
= proc_dointvec
,
4583 .procname
= "force_tllao",
4584 .data
= &ipv6_devconf
.force_tllao
,
4585 .maxlen
= sizeof(int),
4587 .proc_handler
= proc_dointvec
4595 static int __addrconf_sysctl_register(struct net
*net
, char *dev_name
,
4596 struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
4599 struct addrconf_sysctl_table
*t
;
4601 #define ADDRCONF_CTL_PATH_DEV 3
4603 struct ctl_path addrconf_ctl_path
[] = {
4604 { .procname
= "net", },
4605 { .procname
= "ipv6", },
4606 { .procname
= "conf", },
4607 { /* to be set */ },
4612 t
= kmemdup(&addrconf_sysctl
, sizeof(*t
), GFP_KERNEL
);
4616 for (i
= 0; t
->addrconf_vars
[i
].data
; i
++) {
4617 t
->addrconf_vars
[i
].data
+= (char *)p
- (char *)&ipv6_devconf
;
4618 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
4619 t
->addrconf_vars
[i
].extra2
= net
;
4623 * Make a copy of dev_name, because '.procname' is regarded as const
4624 * by sysctl and we wouldn't want anyone to change it under our feet
4625 * (see SIOCSIFNAME).
4627 t
->dev_name
= kstrdup(dev_name
, GFP_KERNEL
);
4631 addrconf_ctl_path
[ADDRCONF_CTL_PATH_DEV
].procname
= t
->dev_name
;
4633 t
->sysctl_header
= register_net_sysctl_table(net
, addrconf_ctl_path
,
4635 if (t
->sysctl_header
== NULL
)
4649 static void __addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
4651 struct addrconf_sysctl_table
*t
;
4653 if (p
->sysctl
== NULL
)
4658 unregister_net_sysctl_table(t
->sysctl_header
);
4663 static void addrconf_sysctl_register(struct inet6_dev
*idev
)
4665 neigh_sysctl_register(idev
->dev
, idev
->nd_parms
, "ipv6",
4666 &ndisc_ifinfo_sysctl_change
);
4667 __addrconf_sysctl_register(dev_net(idev
->dev
), idev
->dev
->name
,
4671 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
4673 __addrconf_sysctl_unregister(&idev
->cnf
);
4674 neigh_sysctl_unregister(idev
->nd_parms
);
4680 static int __net_init
addrconf_init_net(struct net
*net
)
4683 struct ipv6_devconf
*all
, *dflt
;
4686 all
= &ipv6_devconf
;
4687 dflt
= &ipv6_devconf_dflt
;
4689 if (!net_eq(net
, &init_net
)) {
4690 all
= kmemdup(all
, sizeof(ipv6_devconf
), GFP_KERNEL
);
4694 dflt
= kmemdup(dflt
, sizeof(ipv6_devconf_dflt
), GFP_KERNEL
);
4696 goto err_alloc_dflt
;
4698 /* these will be inherited by all namespaces */
4699 dflt
->autoconf
= ipv6_defaults
.autoconf
;
4700 dflt
->disable_ipv6
= ipv6_defaults
.disable_ipv6
;
4703 net
->ipv6
.devconf_all
= all
;
4704 net
->ipv6
.devconf_dflt
= dflt
;
4706 #ifdef CONFIG_SYSCTL
4707 err
= __addrconf_sysctl_register(net
, "all", NULL
, all
);
4711 err
= __addrconf_sysctl_register(net
, "default", NULL
, dflt
);
4717 #ifdef CONFIG_SYSCTL
4719 __addrconf_sysctl_unregister(all
);
4729 static void __net_exit
addrconf_exit_net(struct net
*net
)
4731 #ifdef CONFIG_SYSCTL
4732 __addrconf_sysctl_unregister(net
->ipv6
.devconf_dflt
);
4733 __addrconf_sysctl_unregister(net
->ipv6
.devconf_all
);
4735 if (!net_eq(net
, &init_net
)) {
4736 kfree(net
->ipv6
.devconf_dflt
);
4737 kfree(net
->ipv6
.devconf_all
);
4741 static struct pernet_operations addrconf_ops
= {
4742 .init
= addrconf_init_net
,
4743 .exit
= addrconf_exit_net
,
4750 int register_inet6addr_notifier(struct notifier_block
*nb
)
4752 return atomic_notifier_chain_register(&inet6addr_chain
, nb
);
4754 EXPORT_SYMBOL(register_inet6addr_notifier
);
4756 int unregister_inet6addr_notifier(struct notifier_block
*nb
)
4758 return atomic_notifier_chain_unregister(&inet6addr_chain
, nb
);
4760 EXPORT_SYMBOL(unregister_inet6addr_notifier
);
4762 static struct rtnl_af_ops inet6_ops
= {
4764 .fill_link_af
= inet6_fill_link_af
,
4765 .get_link_af_size
= inet6_get_link_af_size
,
4769 * Init / cleanup code
4772 int __init
addrconf_init(void)
4776 err
= ipv6_addr_label_init();
4778 printk(KERN_CRIT
"IPv6 Addrconf:"
4779 " cannot initialize default policy table: %d.\n", err
);
4783 err
= register_pernet_subsys(&addrconf_ops
);
4787 /* The addrconf netdev notifier requires that loopback_dev
4788 * has it's ipv6 private information allocated and setup
4789 * before it can bring up and give link-local addresses
4790 * to other devices which are up.
4792 * Unfortunately, loopback_dev is not necessarily the first
4793 * entry in the global dev_base list of net devices. In fact,
4794 * it is likely to be the very last entry on that list.
4795 * So this causes the notifier registry below to try and
4796 * give link-local addresses to all devices besides loopback_dev
4797 * first, then loopback_dev, which cases all the non-loopback_dev
4798 * devices to fail to get a link-local address.
4800 * So, as a temporary fix, allocate the ipv6 structure for
4801 * loopback_dev first by hand.
4802 * Longer term, all of the dependencies ipv6 has upon the loopback
4803 * device and it being up should be removed.
4806 if (!ipv6_add_dev(init_net
.loopback_dev
))
4812 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
4813 INIT_HLIST_HEAD(&inet6_addr_lst
[i
]);
4815 register_netdevice_notifier(&ipv6_dev_notf
);
4819 err
= rtnl_af_register(&inet6_ops
);
4823 err
= __rtnl_register(PF_INET6
, RTM_GETLINK
, NULL
, inet6_dump_ifinfo
,
4828 /* Only the first call to __rtnl_register can fail */
4829 __rtnl_register(PF_INET6
, RTM_NEWADDR
, inet6_rtm_newaddr
, NULL
, NULL
);
4830 __rtnl_register(PF_INET6
, RTM_DELADDR
, inet6_rtm_deladdr
, NULL
, NULL
);
4831 __rtnl_register(PF_INET6
, RTM_GETADDR
, inet6_rtm_getaddr
,
4832 inet6_dump_ifaddr
, NULL
);
4833 __rtnl_register(PF_INET6
, RTM_GETMULTICAST
, NULL
,
4834 inet6_dump_ifmcaddr
, NULL
);
4835 __rtnl_register(PF_INET6
, RTM_GETANYCAST
, NULL
,
4836 inet6_dump_ifacaddr
, NULL
);
4838 ipv6_addr_label_rtnl_register();
4842 rtnl_af_unregister(&inet6_ops
);
4844 unregister_netdevice_notifier(&ipv6_dev_notf
);
4846 unregister_pernet_subsys(&addrconf_ops
);
4848 ipv6_addr_label_cleanup();
4853 void addrconf_cleanup(void)
4855 struct net_device
*dev
;
4858 unregister_netdevice_notifier(&ipv6_dev_notf
);
4859 unregister_pernet_subsys(&addrconf_ops
);
4860 ipv6_addr_label_cleanup();
4864 __rtnl_af_unregister(&inet6_ops
);
4866 /* clean dev list */
4867 for_each_netdev(&init_net
, dev
) {
4868 if (__in6_dev_get(dev
) == NULL
)
4870 addrconf_ifdown(dev
, 1);
4872 addrconf_ifdown(init_net
.loopback_dev
, 2);
4877 spin_lock_bh(&addrconf_hash_lock
);
4878 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
4879 WARN_ON(!hlist_empty(&inet6_addr_lst
[i
]));
4880 spin_unlock_bh(&addrconf_hash_lock
);
4882 del_timer(&addr_chk_timer
);