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>
69 #include <net/af_ieee802154.h>
71 #include <net/protocol.h>
72 #include <net/ndisc.h>
73 #include <net/ip6_route.h>
74 #include <net/addrconf.h>
77 #include <net/netlink.h>
78 #include <net/pkt_sched.h>
79 #include <linux/if_tunnel.h>
80 #include <linux/rtnetlink.h>
82 #ifdef CONFIG_IPV6_PRIVACY
83 #include <linux/random.h>
86 #include <linux/uaccess.h>
87 #include <asm/unaligned.h>
89 #include <linux/proc_fs.h>
90 #include <linux/seq_file.h>
91 #include <linux/export.h>
93 /* Set to 3 to get tracing... */
97 #define ADBG(x) printk x
102 #define INFINITY_LIFE_TIME 0xFFFFFFFF
104 static inline u32
cstamp_delta(unsigned long cstamp
)
106 return (cstamp
- INITIAL_JIFFIES
) * 100UL / HZ
;
109 #define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ/50 : 1)
110 #define ADDRCONF_TIMER_FUZZ (HZ / 4)
111 #define ADDRCONF_TIMER_FUZZ_MAX (HZ)
114 static void addrconf_sysctl_register(struct inet6_dev
*idev
);
115 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
);
117 static inline void addrconf_sysctl_register(struct inet6_dev
*idev
)
121 static inline void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
126 #ifdef CONFIG_IPV6_PRIVACY
127 static int __ipv6_regen_rndid(struct inet6_dev
*idev
);
128 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
129 static void ipv6_regen_rndid(unsigned long data
);
132 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
);
133 static int ipv6_count_addresses(struct inet6_dev
*idev
);
136 * Configured unicast address hash table
138 static struct hlist_head inet6_addr_lst
[IN6_ADDR_HSIZE
];
139 static DEFINE_SPINLOCK(addrconf_hash_lock
);
141 static void addrconf_verify(unsigned long);
143 static DEFINE_TIMER(addr_chk_timer
, addrconf_verify
, 0, 0);
144 static DEFINE_SPINLOCK(addrconf_verify_lock
);
146 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
147 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
149 static void addrconf_type_change(struct net_device
*dev
,
150 unsigned long event
);
151 static int addrconf_ifdown(struct net_device
*dev
, int how
);
153 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
);
154 static void addrconf_dad_timer(unsigned long data
);
155 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
);
156 static void addrconf_dad_run(struct inet6_dev
*idev
);
157 static void addrconf_rs_timer(unsigned long data
);
158 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
159 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
161 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
162 struct prefix_info
*pinfo
);
163 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
164 struct net_device
*dev
);
166 static ATOMIC_NOTIFIER_HEAD(inet6addr_chain
);
168 static struct ipv6_devconf ipv6_devconf __read_mostly
= {
170 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
171 .mtu6
= IPV6_MIN_MTU
,
173 .accept_redirects
= 1,
175 .force_mld_version
= 0,
177 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
178 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
179 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
180 #ifdef CONFIG_IPV6_PRIVACY
182 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
183 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
184 .regen_max_retry
= REGEN_MAX_RETRY
,
185 .max_desync_factor
= MAX_DESYNC_FACTOR
,
187 .max_addresses
= IPV6_MAX_ADDRESSES
,
188 .accept_ra_defrtr
= 1,
189 .accept_ra_pinfo
= 1,
190 #ifdef CONFIG_IPV6_ROUTER_PREF
191 .accept_ra_rtr_pref
= 1,
192 .rtr_probe_interval
= 60 * HZ
,
193 #ifdef CONFIG_IPV6_ROUTE_INFO
194 .accept_ra_rt_info_max_plen
= 0,
198 .accept_source_route
= 0, /* we do not accept RH0 by default. */
203 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly
= {
205 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
206 .mtu6
= IPV6_MIN_MTU
,
208 .accept_redirects
= 1,
211 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
212 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
213 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
214 #ifdef CONFIG_IPV6_PRIVACY
216 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
217 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
218 .regen_max_retry
= REGEN_MAX_RETRY
,
219 .max_desync_factor
= MAX_DESYNC_FACTOR
,
221 .max_addresses
= IPV6_MAX_ADDRESSES
,
222 .accept_ra_defrtr
= 1,
223 .accept_ra_pinfo
= 1,
224 #ifdef CONFIG_IPV6_ROUTER_PREF
225 .accept_ra_rtr_pref
= 1,
226 .rtr_probe_interval
= 60 * HZ
,
227 #ifdef CONFIG_IPV6_ROUTE_INFO
228 .accept_ra_rt_info_max_plen
= 0,
232 .accept_source_route
= 0, /* we do not accept RH0 by default. */
237 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
238 const struct in6_addr in6addr_any
= IN6ADDR_ANY_INIT
;
239 const struct in6_addr in6addr_loopback
= IN6ADDR_LOOPBACK_INIT
;
240 const struct in6_addr in6addr_linklocal_allnodes
= IN6ADDR_LINKLOCAL_ALLNODES_INIT
;
241 const struct in6_addr in6addr_linklocal_allrouters
= IN6ADDR_LINKLOCAL_ALLROUTERS_INIT
;
243 /* Check if a valid qdisc is available */
244 static inline bool addrconf_qdisc_ok(const struct net_device
*dev
)
246 return !qdisc_tx_is_noop(dev
);
249 /* Check if a route is valid prefix route */
250 static inline int addrconf_is_prefix_route(const struct rt6_info
*rt
)
252 return (rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0;
255 static void addrconf_del_timer(struct inet6_ifaddr
*ifp
)
257 if (del_timer(&ifp
->timer
))
261 enum addrconf_timer_t
{
267 static void addrconf_mod_timer(struct inet6_ifaddr
*ifp
,
268 enum addrconf_timer_t what
,
271 if (!del_timer(&ifp
->timer
))
276 ifp
->timer
.function
= addrconf_dad_timer
;
279 ifp
->timer
.function
= addrconf_rs_timer
;
284 ifp
->timer
.expires
= jiffies
+ when
;
285 add_timer(&ifp
->timer
);
288 static int snmp6_alloc_dev(struct inet6_dev
*idev
)
290 if (snmp_mib_init((void __percpu
**)idev
->stats
.ipv6
,
291 sizeof(struct ipstats_mib
),
292 __alignof__(struct ipstats_mib
)) < 0)
294 idev
->stats
.icmpv6dev
= kzalloc(sizeof(struct icmpv6_mib_device
),
296 if (!idev
->stats
.icmpv6dev
)
298 idev
->stats
.icmpv6msgdev
= kzalloc(sizeof(struct icmpv6msg_mib_device
),
300 if (!idev
->stats
.icmpv6msgdev
)
306 kfree(idev
->stats
.icmpv6dev
);
308 snmp_mib_free((void __percpu
**)idev
->stats
.ipv6
);
313 static void snmp6_free_dev(struct inet6_dev
*idev
)
315 kfree(idev
->stats
.icmpv6msgdev
);
316 kfree(idev
->stats
.icmpv6dev
);
317 snmp_mib_free((void __percpu
**)idev
->stats
.ipv6
);
320 /* Nobody refers to this device, we may destroy it. */
322 void in6_dev_finish_destroy(struct inet6_dev
*idev
)
324 struct net_device
*dev
= idev
->dev
;
326 WARN_ON(!list_empty(&idev
->addr_list
));
327 WARN_ON(idev
->mc_list
!= NULL
);
329 #ifdef NET_REFCNT_DEBUG
330 printk(KERN_DEBUG
"in6_dev_finish_destroy: %s\n", dev
? dev
->name
: "NIL");
334 pr_warning("Freeing alive inet6 device %p\n", idev
);
337 snmp6_free_dev(idev
);
338 kfree_rcu(idev
, rcu
);
340 EXPORT_SYMBOL(in6_dev_finish_destroy
);
342 static struct inet6_dev
*ipv6_add_dev(struct net_device
*dev
)
344 struct inet6_dev
*ndev
;
348 if (dev
->mtu
< IPV6_MIN_MTU
)
351 ndev
= kzalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
356 rwlock_init(&ndev
->lock
);
358 INIT_LIST_HEAD(&ndev
->addr_list
);
360 memcpy(&ndev
->cnf
, dev_net(dev
)->ipv6
.devconf_dflt
, sizeof(ndev
->cnf
));
361 ndev
->cnf
.mtu6
= dev
->mtu
;
362 ndev
->cnf
.sysctl
= NULL
;
363 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
364 if (ndev
->nd_parms
== NULL
) {
368 if (ndev
->cnf
.forwarding
)
369 dev_disable_lro(dev
);
370 /* We refer to the device */
373 if (snmp6_alloc_dev(ndev
) < 0) {
375 "%s(): cannot allocate memory for statistics; dev=%s.\n",
376 __func__
, dev
->name
));
377 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
383 if (snmp6_register_dev(ndev
) < 0) {
385 "%s(): cannot create /proc/net/dev_snmp6/%s\n",
386 __func__
, dev
->name
));
387 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
389 in6_dev_finish_destroy(ndev
);
393 /* One reference from device. We must do this before
394 * we invoke __ipv6_regen_rndid().
398 if (dev
->flags
& (IFF_NOARP
| IFF_LOOPBACK
))
399 ndev
->cnf
.accept_dad
= -1;
401 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
402 if (dev
->type
== ARPHRD_SIT
&& (dev
->priv_flags
& IFF_ISATAP
)) {
404 "%s: Disabled Multicast RS\n",
406 ndev
->cnf
.rtr_solicits
= 0;
410 #ifdef CONFIG_IPV6_PRIVACY
411 INIT_LIST_HEAD(&ndev
->tempaddr_list
);
412 setup_timer(&ndev
->regen_timer
, ipv6_regen_rndid
, (unsigned long)ndev
);
413 if ((dev
->flags
&IFF_LOOPBACK
) ||
414 dev
->type
== ARPHRD_TUNNEL
||
415 dev
->type
== ARPHRD_TUNNEL6
||
416 dev
->type
== ARPHRD_SIT
||
417 dev
->type
== ARPHRD_NONE
) {
418 ndev
->cnf
.use_tempaddr
= -1;
421 ipv6_regen_rndid((unsigned long) ndev
);
425 if (netif_running(dev
) && addrconf_qdisc_ok(dev
))
426 ndev
->if_flags
|= IF_READY
;
428 ipv6_mc_init_dev(ndev
);
429 ndev
->tstamp
= jiffies
;
430 addrconf_sysctl_register(ndev
);
431 /* protected by rtnl_lock */
432 rcu_assign_pointer(dev
->ip6_ptr
, ndev
);
434 /* Join all-node multicast group */
435 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allnodes
);
437 /* Join all-router multicast group if forwarding is set */
438 if (ndev
->cnf
.forwarding
&& (dev
->flags
& IFF_MULTICAST
))
439 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
444 static struct inet6_dev
*ipv6_find_idev(struct net_device
*dev
)
446 struct inet6_dev
*idev
;
450 idev
= __in6_dev_get(dev
);
452 idev
= ipv6_add_dev(dev
);
457 if (dev
->flags
&IFF_UP
)
463 static void dev_forward_change(struct inet6_dev
*idev
)
465 struct net_device
*dev
;
466 struct inet6_ifaddr
*ifa
;
471 if (idev
->cnf
.forwarding
)
472 dev_disable_lro(dev
);
473 if (dev
&& (dev
->flags
& IFF_MULTICAST
)) {
474 if (idev
->cnf
.forwarding
)
475 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
477 ipv6_dev_mc_dec(dev
, &in6addr_linklocal_allrouters
);
480 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
481 if (ifa
->flags
&IFA_F_TENTATIVE
)
483 if (idev
->cnf
.forwarding
)
484 addrconf_join_anycast(ifa
);
486 addrconf_leave_anycast(ifa
);
491 static void addrconf_forward_change(struct net
*net
, __s32 newf
)
493 struct net_device
*dev
;
494 struct inet6_dev
*idev
;
497 for_each_netdev_rcu(net
, dev
) {
498 idev
= __in6_dev_get(dev
);
500 int changed
= (!idev
->cnf
.forwarding
) ^ (!newf
);
501 idev
->cnf
.forwarding
= newf
;
503 dev_forward_change(idev
);
509 static int addrconf_fixup_forwarding(struct ctl_table
*table
, int *p
, int newf
)
515 return restart_syscall();
517 net
= (struct net
*)table
->extra2
;
521 if (p
== &net
->ipv6
.devconf_dflt
->forwarding
) {
526 if (p
== &net
->ipv6
.devconf_all
->forwarding
) {
527 net
->ipv6
.devconf_dflt
->forwarding
= newf
;
528 addrconf_forward_change(net
, newf
);
529 } else if ((!newf
) ^ (!old
))
530 dev_forward_change((struct inet6_dev
*)table
->extra1
);
534 rt6_purge_dflt_routers(net
);
539 /* Nobody refers to this ifaddr, destroy it */
540 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
542 WARN_ON(!hlist_unhashed(&ifp
->addr_lst
));
544 #ifdef NET_REFCNT_DEBUG
545 printk(KERN_DEBUG
"inet6_ifa_finish_destroy\n");
548 in6_dev_put(ifp
->idev
);
550 if (del_timer(&ifp
->timer
))
551 pr_notice("Timer is still running, when freeing ifa=%p\n", ifp
);
553 if (ifp
->state
!= INET6_IFADDR_STATE_DEAD
) {
554 pr_warning("Freeing alive inet6 address %p\n", ifp
);
557 dst_release(&ifp
->rt
->dst
);
563 ipv6_link_dev_addr(struct inet6_dev
*idev
, struct inet6_ifaddr
*ifp
)
566 int ifp_scope
= ipv6_addr_src_scope(&ifp
->addr
);
569 * Each device address list is sorted in order of scope -
570 * global before linklocal.
572 list_for_each(p
, &idev
->addr_list
) {
573 struct inet6_ifaddr
*ifa
574 = list_entry(p
, struct inet6_ifaddr
, if_list
);
575 if (ifp_scope
>= ipv6_addr_src_scope(&ifa
->addr
))
579 list_add_tail(&ifp
->if_list
, p
);
582 static u32
ipv6_addr_hash(const struct in6_addr
*addr
)
585 * We perform the hash function over the last 64 bits of the address
586 * This will include the IEEE address token on links that support it.
588 return jhash_2words((__force u32
)addr
->s6_addr32
[2],
589 (__force u32
)addr
->s6_addr32
[3], 0)
590 & (IN6_ADDR_HSIZE
- 1);
593 /* On success it returns ifp with increased reference count */
595 static struct inet6_ifaddr
*
596 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
, int pfxlen
,
597 int scope
, u32 flags
)
599 struct inet6_ifaddr
*ifa
= NULL
;
603 int addr_type
= ipv6_addr_type(addr
);
605 if (addr_type
== IPV6_ADDR_ANY
||
606 addr_type
& IPV6_ADDR_MULTICAST
||
607 (!(idev
->dev
->flags
& IFF_LOOPBACK
) &&
608 addr_type
& IPV6_ADDR_LOOPBACK
))
609 return ERR_PTR(-EADDRNOTAVAIL
);
613 err
= -ENODEV
; /*XXX*/
617 if (idev
->cnf
.disable_ipv6
) {
622 spin_lock(&addrconf_hash_lock
);
624 /* Ignore adding duplicate addresses on an interface */
625 if (ipv6_chk_same_addr(dev_net(idev
->dev
), addr
, idev
->dev
)) {
626 ADBG(("ipv6_add_addr: already assigned\n"));
631 ifa
= kzalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
634 ADBG(("ipv6_add_addr: malloc failed\n"));
639 rt
= addrconf_dst_alloc(idev
, addr
, false);
647 spin_lock_init(&ifa
->lock
);
648 spin_lock_init(&ifa
->state_lock
);
649 init_timer(&ifa
->timer
);
650 INIT_HLIST_NODE(&ifa
->addr_lst
);
651 ifa
->timer
.data
= (unsigned long) ifa
;
653 ifa
->prefix_len
= pfxlen
;
654 ifa
->flags
= flags
| IFA_F_TENTATIVE
;
655 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
664 /* Add to big hash table */
665 hash
= ipv6_addr_hash(addr
);
667 hlist_add_head_rcu(&ifa
->addr_lst
, &inet6_addr_lst
[hash
]);
668 spin_unlock(&addrconf_hash_lock
);
670 write_lock(&idev
->lock
);
671 /* Add to inet6_dev unicast addr list. */
672 ipv6_link_dev_addr(idev
, ifa
);
674 #ifdef CONFIG_IPV6_PRIVACY
675 if (ifa
->flags
&IFA_F_TEMPORARY
) {
676 list_add(&ifa
->tmp_list
, &idev
->tempaddr_list
);
682 write_unlock(&idev
->lock
);
684 rcu_read_unlock_bh();
686 if (likely(err
== 0))
687 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_UP
, ifa
);
695 spin_unlock(&addrconf_hash_lock
);
699 /* This function wants to get referenced ifp and releases it before return */
701 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
703 struct inet6_ifaddr
*ifa
, *ifn
;
704 struct inet6_dev
*idev
= ifp
->idev
;
706 int deleted
= 0, onlink
= 0;
707 unsigned long expires
= jiffies
;
709 spin_lock_bh(&ifp
->state_lock
);
711 ifp
->state
= INET6_IFADDR_STATE_DEAD
;
712 spin_unlock_bh(&ifp
->state_lock
);
714 if (state
== INET6_IFADDR_STATE_DEAD
)
717 spin_lock_bh(&addrconf_hash_lock
);
718 hlist_del_init_rcu(&ifp
->addr_lst
);
719 spin_unlock_bh(&addrconf_hash_lock
);
721 write_lock_bh(&idev
->lock
);
722 #ifdef CONFIG_IPV6_PRIVACY
723 if (ifp
->flags
&IFA_F_TEMPORARY
) {
724 list_del(&ifp
->tmp_list
);
726 in6_ifa_put(ifp
->ifpub
);
733 list_for_each_entry_safe(ifa
, ifn
, &idev
->addr_list
, if_list
) {
735 list_del_init(&ifp
->if_list
);
738 if (!(ifp
->flags
& IFA_F_PERMANENT
) || onlink
> 0)
742 } else if (ifp
->flags
& IFA_F_PERMANENT
) {
743 if (ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
745 if (ifa
->flags
& IFA_F_PERMANENT
) {
750 unsigned long lifetime
;
755 spin_lock(&ifa
->lock
);
757 lifetime
= addrconf_timeout_fixup(ifa
->valid_lft
, HZ
);
759 * Note: Because this address is
760 * not permanent, lifetime <
761 * LONG_MAX / HZ here.
763 if (time_before(expires
,
764 ifa
->tstamp
+ lifetime
* HZ
))
765 expires
= ifa
->tstamp
+ lifetime
* HZ
;
766 spin_unlock(&ifa
->lock
);
771 write_unlock_bh(&idev
->lock
);
773 addrconf_del_timer(ifp
);
775 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
777 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifp
);
780 * Purge or update corresponding prefix
782 * 1) we don't purge prefix here if address was not permanent.
783 * prefix is managed by its own lifetime.
784 * 2) if there're no addresses, delete prefix.
785 * 3) if there're still other permanent address(es),
786 * corresponding prefix is still permanent.
787 * 4) otherwise, update prefix lifetime to the
788 * longest valid lifetime among the corresponding
789 * addresses on the device.
790 * Note: subsequent RA will update lifetime.
794 if ((ifp
->flags
& IFA_F_PERMANENT
) && onlink
< 1) {
795 struct in6_addr prefix
;
797 struct net
*net
= dev_net(ifp
->idev
->dev
);
798 ipv6_addr_prefix(&prefix
, &ifp
->addr
, ifp
->prefix_len
);
799 rt
= rt6_lookup(net
, &prefix
, NULL
, ifp
->idev
->dev
->ifindex
, 1);
801 if (rt
&& addrconf_is_prefix_route(rt
)) {
805 } else if (!(rt
->rt6i_flags
& RTF_EXPIRES
)) {
806 rt6_set_expires(rt
, 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_eui64(u8
*eui
, struct net_device
*dev
)
1520 if (dev
->addr_len
!= IEEE802154_ADDR_LEN
)
1522 memcpy(eui
, dev
->dev_addr
, 8);
1526 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
1528 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1529 if (dev
->addr_len
!= ARCNET_ALEN
)
1532 eui
[7] = *(u8
*)dev
->dev_addr
;
1536 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
1538 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1540 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1545 static int __ipv6_isatap_ifid(u8
*eui
, __be32 addr
)
1549 eui
[0] = (ipv4_is_zeronet(addr
) || ipv4_is_private_10(addr
) ||
1550 ipv4_is_loopback(addr
) || ipv4_is_linklocal_169(addr
) ||
1551 ipv4_is_private_172(addr
) || ipv4_is_test_192(addr
) ||
1552 ipv4_is_anycast_6to4(addr
) || ipv4_is_private_192(addr
) ||
1553 ipv4_is_test_198(addr
) || ipv4_is_multicast(addr
) ||
1554 ipv4_is_lbcast(addr
)) ? 0x00 : 0x02;
1558 memcpy(eui
+ 4, &addr
, 4);
1562 static int addrconf_ifid_sit(u8
*eui
, struct net_device
*dev
)
1564 if (dev
->priv_flags
& IFF_ISATAP
)
1565 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
1569 static int addrconf_ifid_gre(u8
*eui
, struct net_device
*dev
)
1571 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
1574 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1576 switch (dev
->type
) {
1579 case ARPHRD_IEEE802_TR
:
1580 return addrconf_ifid_eui48(eui
, dev
);
1582 return addrconf_ifid_arcnet(eui
, dev
);
1583 case ARPHRD_INFINIBAND
:
1584 return addrconf_ifid_infiniband(eui
, dev
);
1586 return addrconf_ifid_sit(eui
, dev
);
1588 return addrconf_ifid_gre(eui
, dev
);
1589 case ARPHRD_IEEE802154
:
1590 return addrconf_ifid_eui64(eui
, dev
);
1595 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1598 struct inet6_ifaddr
*ifp
;
1600 read_lock_bh(&idev
->lock
);
1601 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
1602 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1603 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1608 read_unlock_bh(&idev
->lock
);
1612 #ifdef CONFIG_IPV6_PRIVACY
1613 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1614 static int __ipv6_regen_rndid(struct inet6_dev
*idev
)
1617 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
1618 idev
->rndid
[0] &= ~0x02;
1621 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1622 * check if generated address is not inappropriate
1624 * - Reserved subnet anycast (RFC 2526)
1625 * 11111101 11....11 1xxxxxxx
1626 * - ISATAP (RFC4214) 6.1
1627 * 00-00-5E-FE-xx-xx-xx-xx
1629 * - XXX: already assigned to an address on the device
1631 if (idev
->rndid
[0] == 0xfd &&
1632 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1633 (idev
->rndid
[7]&0x80))
1635 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1636 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1638 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1645 static void ipv6_regen_rndid(unsigned long data
)
1647 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1648 unsigned long expires
;
1651 write_lock_bh(&idev
->lock
);
1656 if (__ipv6_regen_rndid(idev
) < 0)
1660 idev
->cnf
.temp_prefered_lft
* HZ
-
1661 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
-
1662 idev
->cnf
.max_desync_factor
* HZ
;
1663 if (time_before(expires
, jiffies
)) {
1665 "ipv6_regen_rndid(): too short regeneration interval; timer disabled for %s.\n",
1670 if (!mod_timer(&idev
->regen_timer
, expires
))
1674 write_unlock_bh(&idev
->lock
);
1675 rcu_read_unlock_bh();
1679 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
)
1683 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1684 ret
= __ipv6_regen_rndid(idev
);
1694 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1695 unsigned long expires
, u32 flags
)
1697 struct fib6_config cfg
= {
1698 .fc_table
= RT6_TABLE_PREFIX
,
1699 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1700 .fc_ifindex
= dev
->ifindex
,
1701 .fc_expires
= expires
,
1703 .fc_flags
= RTF_UP
| flags
,
1704 .fc_nlinfo
.nl_net
= dev_net(dev
),
1705 .fc_protocol
= RTPROT_KERNEL
,
1710 /* Prevent useless cloning on PtP SIT.
1711 This thing is done here expecting that the whole
1712 class of non-broadcast devices need not cloning.
1714 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1715 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
1716 cfg
.fc_flags
|= RTF_NONEXTHOP
;
1719 ip6_route_add(&cfg
);
1723 static struct rt6_info
*addrconf_get_prefix_route(const struct in6_addr
*pfx
,
1725 const struct net_device
*dev
,
1726 u32 flags
, u32 noflags
)
1728 struct fib6_node
*fn
;
1729 struct rt6_info
*rt
= NULL
;
1730 struct fib6_table
*table
;
1732 table
= fib6_get_table(dev_net(dev
), RT6_TABLE_PREFIX
);
1736 write_lock_bh(&table
->tb6_lock
);
1737 fn
= fib6_locate(&table
->tb6_root
, pfx
, plen
, NULL
, 0);
1740 for (rt
= fn
->leaf
; rt
; rt
= rt
->dst
.rt6_next
) {
1741 if (rt
->dst
.dev
->ifindex
!= dev
->ifindex
)
1743 if ((rt
->rt6i_flags
& flags
) != flags
)
1745 if ((noflags
!= 0) && ((rt
->rt6i_flags
& flags
) != 0))
1751 write_unlock_bh(&table
->tb6_lock
);
1756 /* Create "default" multicast route to the interface */
1758 static void addrconf_add_mroute(struct net_device
*dev
)
1760 struct fib6_config cfg
= {
1761 .fc_table
= RT6_TABLE_LOCAL
,
1762 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1763 .fc_ifindex
= dev
->ifindex
,
1766 .fc_nlinfo
.nl_net
= dev_net(dev
),
1769 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
1771 ip6_route_add(&cfg
);
1774 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1775 static void sit_route_add(struct net_device
*dev
)
1777 struct fib6_config cfg
= {
1778 .fc_table
= RT6_TABLE_MAIN
,
1779 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1780 .fc_ifindex
= dev
->ifindex
,
1782 .fc_flags
= RTF_UP
| RTF_NONEXTHOP
,
1783 .fc_nlinfo
.nl_net
= dev_net(dev
),
1786 /* prefix length - 96 bits "::d.d.d.d" */
1787 ip6_route_add(&cfg
);
1791 static void addrconf_add_lroute(struct net_device
*dev
)
1793 struct in6_addr addr
;
1795 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
1796 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
1799 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
1801 struct inet6_dev
*idev
;
1805 idev
= ipv6_find_idev(dev
);
1807 return ERR_PTR(-ENOBUFS
);
1809 if (idev
->cnf
.disable_ipv6
)
1810 return ERR_PTR(-EACCES
);
1812 /* Add default multicast route */
1813 if (!(dev
->flags
& IFF_LOOPBACK
))
1814 addrconf_add_mroute(dev
);
1816 /* Add link local route */
1817 addrconf_add_lroute(dev
);
1821 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
, bool sllao
)
1823 struct prefix_info
*pinfo
;
1827 struct inet6_dev
*in6_dev
;
1828 struct net
*net
= dev_net(dev
);
1830 pinfo
= (struct prefix_info
*) opt
;
1832 if (len
< sizeof(struct prefix_info
)) {
1833 ADBG(("addrconf: prefix option too short\n"));
1838 * Validation checks ([ADDRCONF], page 19)
1841 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
1843 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
1846 valid_lft
= ntohl(pinfo
->valid
);
1847 prefered_lft
= ntohl(pinfo
->prefered
);
1849 if (prefered_lft
> valid_lft
) {
1850 if (net_ratelimit())
1851 printk(KERN_WARNING
"addrconf: prefix option has invalid lifetime\n");
1855 in6_dev
= in6_dev_get(dev
);
1857 if (in6_dev
== NULL
) {
1858 if (net_ratelimit())
1859 printk(KERN_DEBUG
"addrconf: device %s not configured\n", dev
->name
);
1864 * Two things going on here:
1865 * 1) Add routes for on-link prefixes
1866 * 2) Configure prefixes with the auto flag set
1869 if (pinfo
->onlink
) {
1870 struct rt6_info
*rt
;
1871 unsigned long rt_expires
;
1873 /* Avoid arithmetic overflow. Really, we could
1874 * save rt_expires in seconds, likely valid_lft,
1875 * but it would require division in fib gc, that it
1879 rt_expires
= addrconf_timeout_fixup(valid_lft
, HZ
);
1881 rt_expires
= addrconf_timeout_fixup(valid_lft
, USER_HZ
);
1883 if (addrconf_finite_timeout(rt_expires
))
1886 rt
= addrconf_get_prefix_route(&pinfo
->prefix
,
1889 RTF_ADDRCONF
| RTF_PREFIX_RT
,
1890 RTF_GATEWAY
| RTF_DEFAULT
);
1893 /* Autoconf prefix route */
1894 if (valid_lft
== 0) {
1897 } else if (addrconf_finite_timeout(rt_expires
)) {
1899 rt6_set_expires(rt
, jiffies
+ rt_expires
);
1901 rt6_clean_expires(rt
);
1903 } else if (valid_lft
) {
1904 clock_t expires
= 0;
1905 int flags
= RTF_ADDRCONF
| RTF_PREFIX_RT
;
1906 if (addrconf_finite_timeout(rt_expires
)) {
1908 flags
|= RTF_EXPIRES
;
1909 expires
= jiffies_to_clock_t(rt_expires
);
1911 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
1912 dev
, expires
, flags
);
1915 dst_release(&rt
->dst
);
1918 /* Try to figure out our local address for this prefix */
1920 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
1921 struct inet6_ifaddr
*ifp
;
1922 struct in6_addr addr
;
1923 int create
= 0, update_lft
= 0;
1925 if (pinfo
->prefix_len
== 64) {
1926 memcpy(&addr
, &pinfo
->prefix
, 8);
1927 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
1928 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
1929 in6_dev_put(in6_dev
);
1934 if (net_ratelimit())
1935 printk(KERN_DEBUG
"IPv6 addrconf: prefix with wrong length %d\n",
1937 in6_dev_put(in6_dev
);
1942 ifp
= ipv6_get_ifaddr(net
, &addr
, dev
, 1);
1944 if (ifp
== NULL
&& valid_lft
) {
1945 int max_addresses
= in6_dev
->cnf
.max_addresses
;
1948 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1949 if (in6_dev
->cnf
.optimistic_dad
&&
1950 !net
->ipv6
.devconf_all
->forwarding
&& sllao
)
1951 addr_flags
= IFA_F_OPTIMISTIC
;
1954 /* Do not allow to create too much of autoconfigured
1955 * addresses; this would be too easy way to crash kernel.
1957 if (!max_addresses
||
1958 ipv6_count_addresses(in6_dev
) < max_addresses
)
1959 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
1960 addr_type
&IPV6_ADDR_SCOPE_MASK
,
1963 if (!ifp
|| IS_ERR(ifp
)) {
1964 in6_dev_put(in6_dev
);
1968 update_lft
= create
= 1;
1969 ifp
->cstamp
= jiffies
;
1970 addrconf_dad_start(ifp
);
1976 #ifdef CONFIG_IPV6_PRIVACY
1977 struct inet6_ifaddr
*ift
;
1981 /* update lifetime (RFC2462 5.5.3 e) */
1982 spin_lock(&ifp
->lock
);
1984 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
1985 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
1988 if (!update_lft
&& stored_lft
) {
1989 if (valid_lft
> MIN_VALID_LIFETIME
||
1990 valid_lft
> stored_lft
)
1992 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
1993 /* valid_lft <= stored_lft is always true */
1995 * RFC 4862 Section 5.5.3e:
1996 * "Note that the preferred lifetime of
1997 * the corresponding address is always
1998 * reset to the Preferred Lifetime in
1999 * the received Prefix Information
2000 * option, regardless of whether the
2001 * valid lifetime is also reset or
2004 * So if the preferred lifetime in
2005 * this advertisement is different
2006 * than what we have stored, but the
2007 * valid lifetime is invalid, just
2008 * reset prefered_lft.
2010 * We must set the valid lifetime
2011 * to the stored lifetime since we'll
2012 * be updating the timestamp below,
2013 * else we'll set it back to the
2016 if (prefered_lft
!= ifp
->prefered_lft
) {
2017 valid_lft
= stored_lft
;
2021 valid_lft
= MIN_VALID_LIFETIME
;
2022 if (valid_lft
< prefered_lft
)
2023 prefered_lft
= valid_lft
;
2029 ifp
->valid_lft
= valid_lft
;
2030 ifp
->prefered_lft
= prefered_lft
;
2033 ifp
->flags
&= ~IFA_F_DEPRECATED
;
2034 spin_unlock(&ifp
->lock
);
2036 if (!(flags
&IFA_F_TENTATIVE
))
2037 ipv6_ifa_notify(0, ifp
);
2039 spin_unlock(&ifp
->lock
);
2041 #ifdef CONFIG_IPV6_PRIVACY
2042 read_lock_bh(&in6_dev
->lock
);
2043 /* update all temporary addresses in the list */
2044 list_for_each_entry(ift
, &in6_dev
->tempaddr_list
,
2046 int age
, max_valid
, max_prefered
;
2048 if (ifp
!= ift
->ifpub
)
2052 * RFC 4941 section 3.3:
2053 * If a received option will extend the lifetime
2054 * of a public address, the lifetimes of
2055 * temporary addresses should be extended,
2056 * subject to the overall constraint that no
2057 * temporary addresses should ever remain
2058 * "valid" or "preferred" for a time longer than
2059 * (TEMP_VALID_LIFETIME) or
2060 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR),
2063 age
= (now
- ift
->cstamp
) / HZ
;
2064 max_valid
= in6_dev
->cnf
.temp_valid_lft
- age
;
2068 max_prefered
= in6_dev
->cnf
.temp_prefered_lft
-
2069 in6_dev
->cnf
.max_desync_factor
-
2071 if (max_prefered
< 0)
2074 if (valid_lft
> max_valid
)
2075 valid_lft
= max_valid
;
2077 if (prefered_lft
> max_prefered
)
2078 prefered_lft
= max_prefered
;
2080 spin_lock(&ift
->lock
);
2082 ift
->valid_lft
= valid_lft
;
2083 ift
->prefered_lft
= prefered_lft
;
2085 if (prefered_lft
> 0)
2086 ift
->flags
&= ~IFA_F_DEPRECATED
;
2088 spin_unlock(&ift
->lock
);
2089 if (!(flags
&IFA_F_TENTATIVE
))
2090 ipv6_ifa_notify(0, ift
);
2093 if ((create
|| list_empty(&in6_dev
->tempaddr_list
)) && in6_dev
->cnf
.use_tempaddr
> 0) {
2095 * When a new public address is created as
2096 * described in [ADDRCONF], also create a new
2097 * temporary address. Also create a temporary
2098 * address if it's enabled but no temporary
2099 * address currently exists.
2101 read_unlock_bh(&in6_dev
->lock
);
2102 ipv6_create_tempaddr(ifp
, NULL
);
2104 read_unlock_bh(&in6_dev
->lock
);
2111 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
2112 in6_dev_put(in6_dev
);
2116 * Set destination address.
2117 * Special case for SIT interfaces where we create a new "virtual"
2120 int addrconf_set_dstaddr(struct net
*net
, void __user
*arg
)
2122 struct in6_ifreq ireq
;
2123 struct net_device
*dev
;
2129 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2132 dev
= __dev_get_by_index(net
, ireq
.ifr6_ifindex
);
2138 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2139 if (dev
->type
== ARPHRD_SIT
) {
2140 const struct net_device_ops
*ops
= dev
->netdev_ops
;
2142 struct ip_tunnel_parm p
;
2144 err
= -EADDRNOTAVAIL
;
2145 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
2148 memset(&p
, 0, sizeof(p
));
2149 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
2153 p
.iph
.protocol
= IPPROTO_IPV6
;
2155 ifr
.ifr_ifru
.ifru_data
= (__force
void __user
*)&p
;
2157 if (ops
->ndo_do_ioctl
) {
2158 mm_segment_t oldfs
= get_fs();
2161 err
= ops
->ndo_do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
2168 dev
= __dev_get_by_name(net
, p
.name
);
2171 err
= dev_open(dev
);
2182 * Manual configuration of address on an interface
2184 static int inet6_addr_add(struct net
*net
, int ifindex
, const struct in6_addr
*pfx
,
2185 unsigned int plen
, __u8 ifa_flags
, __u32 prefered_lft
,
2188 struct inet6_ifaddr
*ifp
;
2189 struct inet6_dev
*idev
;
2190 struct net_device
*dev
;
2194 unsigned long timeout
;
2201 /* check the lifetime */
2202 if (!valid_lft
|| prefered_lft
> valid_lft
)
2205 dev
= __dev_get_by_index(net
, ifindex
);
2209 idev
= addrconf_add_dev(dev
);
2211 return PTR_ERR(idev
);
2213 scope
= ipv6_addr_scope(pfx
);
2215 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
2216 if (addrconf_finite_timeout(timeout
)) {
2217 expires
= jiffies_to_clock_t(timeout
* HZ
);
2218 valid_lft
= timeout
;
2219 flags
= RTF_EXPIRES
;
2223 ifa_flags
|= IFA_F_PERMANENT
;
2226 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
2227 if (addrconf_finite_timeout(timeout
)) {
2229 ifa_flags
|= IFA_F_DEPRECATED
;
2230 prefered_lft
= timeout
;
2233 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, ifa_flags
);
2236 spin_lock_bh(&ifp
->lock
);
2237 ifp
->valid_lft
= valid_lft
;
2238 ifp
->prefered_lft
= prefered_lft
;
2239 ifp
->tstamp
= jiffies
;
2240 spin_unlock_bh(&ifp
->lock
);
2242 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
2245 * Note that section 3.1 of RFC 4429 indicates
2246 * that the Optimistic flag should not be set for
2247 * manually configured addresses
2249 addrconf_dad_start(ifp
);
2255 return PTR_ERR(ifp
);
2258 static int inet6_addr_del(struct net
*net
, int ifindex
, const struct in6_addr
*pfx
,
2261 struct inet6_ifaddr
*ifp
;
2262 struct inet6_dev
*idev
;
2263 struct net_device
*dev
;
2268 dev
= __dev_get_by_index(net
, ifindex
);
2272 if ((idev
= __in6_dev_get(dev
)) == NULL
)
2275 read_lock_bh(&idev
->lock
);
2276 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
2277 if (ifp
->prefix_len
== plen
&&
2278 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
2280 read_unlock_bh(&idev
->lock
);
2284 /* If the last address is deleted administratively,
2285 disable IPv6 on this interface.
2287 if (list_empty(&idev
->addr_list
))
2288 addrconf_ifdown(idev
->dev
, 1);
2292 read_unlock_bh(&idev
->lock
);
2293 return -EADDRNOTAVAIL
;
2297 int addrconf_add_ifaddr(struct net
*net
, void __user
*arg
)
2299 struct in6_ifreq ireq
;
2302 if (!capable(CAP_NET_ADMIN
))
2305 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2309 err
= inet6_addr_add(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2310 ireq
.ifr6_prefixlen
, IFA_F_PERMANENT
,
2311 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2316 int addrconf_del_ifaddr(struct net
*net
, void __user
*arg
)
2318 struct in6_ifreq ireq
;
2321 if (!capable(CAP_NET_ADMIN
))
2324 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2328 err
= inet6_addr_del(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2329 ireq
.ifr6_prefixlen
);
2334 static void add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
2335 int plen
, int scope
)
2337 struct inet6_ifaddr
*ifp
;
2339 ifp
= ipv6_add_addr(idev
, addr
, plen
, scope
, IFA_F_PERMANENT
);
2341 spin_lock_bh(&ifp
->lock
);
2342 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2343 spin_unlock_bh(&ifp
->lock
);
2344 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2349 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2350 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
2352 struct in6_addr addr
;
2353 struct net_device
*dev
;
2354 struct net
*net
= dev_net(idev
->dev
);
2359 memset(&addr
, 0, sizeof(struct in6_addr
));
2360 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
2362 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
2363 addr
.s6_addr32
[0] = htonl(0xfe800000);
2366 scope
= IPV6_ADDR_COMPATv4
;
2369 if (addr
.s6_addr32
[3]) {
2370 add_addr(idev
, &addr
, 128, scope
);
2374 for_each_netdev(net
, dev
) {
2375 struct in_device
*in_dev
= __in_dev_get_rtnl(dev
);
2376 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
2377 struct in_ifaddr
*ifa
;
2381 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
2384 addr
.s6_addr32
[3] = ifa
->ifa_local
;
2386 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
2388 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
2389 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2393 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2398 add_addr(idev
, &addr
, plen
, flag
);
2405 static void init_loopback(struct net_device
*dev
)
2407 struct inet6_dev
*idev
;
2413 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2414 printk(KERN_DEBUG
"init loopback: add_dev failed\n");
2418 add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
);
2421 static void addrconf_add_linklocal(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
2423 struct inet6_ifaddr
*ifp
;
2424 u32 addr_flags
= IFA_F_PERMANENT
;
2426 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2427 if (idev
->cnf
.optimistic_dad
&&
2428 !dev_net(idev
->dev
)->ipv6
.devconf_all
->forwarding
)
2429 addr_flags
|= IFA_F_OPTIMISTIC
;
2433 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, addr_flags
);
2435 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
2436 addrconf_dad_start(ifp
);
2441 static void addrconf_dev_config(struct net_device
*dev
)
2443 struct in6_addr addr
;
2444 struct inet6_dev
*idev
;
2448 if ((dev
->type
!= ARPHRD_ETHER
) &&
2449 (dev
->type
!= ARPHRD_FDDI
) &&
2450 (dev
->type
!= ARPHRD_IEEE802_TR
) &&
2451 (dev
->type
!= ARPHRD_ARCNET
) &&
2452 (dev
->type
!= ARPHRD_INFINIBAND
) &&
2453 (dev
->type
!= ARPHRD_IEEE802154
)) {
2454 /* Alas, we support only Ethernet autoconfiguration. */
2458 idev
= addrconf_add_dev(dev
);
2462 memset(&addr
, 0, sizeof(struct in6_addr
));
2463 addr
.s6_addr32
[0] = htonl(0xFE800000);
2465 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
2466 addrconf_add_linklocal(idev
, &addr
);
2469 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2470 static void addrconf_sit_config(struct net_device
*dev
)
2472 struct inet6_dev
*idev
;
2477 * Configure the tunnel with one of our IPv4
2478 * addresses... we should configure all of
2479 * our v4 addrs in the tunnel
2482 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2483 printk(KERN_DEBUG
"init sit: add_dev failed\n");
2487 if (dev
->priv_flags
& IFF_ISATAP
) {
2488 struct in6_addr addr
;
2490 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2491 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
2492 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
))
2493 addrconf_add_linklocal(idev
, &addr
);
2497 sit_add_v4_addrs(idev
);
2499 if (dev
->flags
&IFF_POINTOPOINT
) {
2500 addrconf_add_mroute(dev
);
2501 addrconf_add_lroute(dev
);
2507 #if defined(CONFIG_NET_IPGRE) || defined(CONFIG_NET_IPGRE_MODULE)
2508 static void addrconf_gre_config(struct net_device
*dev
)
2510 struct inet6_dev
*idev
;
2511 struct in6_addr addr
;
2513 pr_info("ipv6: addrconf_gre_config(%s)\n", dev
->name
);
2517 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2518 printk(KERN_DEBUG
"init gre: add_dev failed\n");
2522 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2523 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
2525 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
))
2526 addrconf_add_linklocal(idev
, &addr
);
2531 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
2533 struct in6_addr lladdr
;
2535 if (!ipv6_get_lladdr(link_dev
, &lladdr
, IFA_F_TENTATIVE
)) {
2536 addrconf_add_linklocal(idev
, &lladdr
);
2542 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
2544 struct net_device
*link_dev
;
2545 struct net
*net
= dev_net(idev
->dev
);
2547 /* first try to inherit the link-local address from the link device */
2548 if (idev
->dev
->iflink
&&
2549 (link_dev
= __dev_get_by_index(net
, idev
->dev
->iflink
))) {
2550 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2553 /* then try to inherit it from any device */
2554 for_each_netdev(net
, link_dev
) {
2555 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2558 printk(KERN_DEBUG
"init ip6-ip6: add_linklocal failed\n");
2562 * Autoconfigure tunnel with a link-local address so routing protocols,
2563 * DHCPv6, MLD etc. can be run over the virtual link
2566 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
2568 struct inet6_dev
*idev
;
2572 idev
= addrconf_add_dev(dev
);
2574 printk(KERN_DEBUG
"init ip6-ip6: add_dev failed\n");
2577 ip6_tnl_add_linklocal(idev
);
2580 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
2583 struct net_device
*dev
= (struct net_device
*) data
;
2584 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2585 int run_pending
= 0;
2589 case NETDEV_REGISTER
:
2590 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2591 idev
= ipv6_add_dev(dev
);
2593 return notifier_from_errno(-ENOMEM
);
2599 if (dev
->flags
& IFF_SLAVE
)
2602 if (event
== NETDEV_UP
) {
2603 if (!addrconf_qdisc_ok(dev
)) {
2604 /* device is not ready yet. */
2606 "ADDRCONF(NETDEV_UP): %s: "
2607 "link is not ready\n",
2612 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
)
2613 idev
= ipv6_add_dev(dev
);
2616 idev
->if_flags
|= IF_READY
;
2620 if (!addrconf_qdisc_ok(dev
)) {
2621 /* device is still not ready. */
2626 if (idev
->if_flags
& IF_READY
)
2627 /* device is already configured. */
2629 idev
->if_flags
|= IF_READY
;
2633 "ADDRCONF(NETDEV_CHANGE): %s: "
2634 "link becomes ready\n",
2640 switch (dev
->type
) {
2641 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2643 addrconf_sit_config(dev
);
2646 #if defined(CONFIG_NET_IPGRE) || defined(CONFIG_NET_IPGRE_MODULE)
2648 addrconf_gre_config(dev
);
2651 case ARPHRD_TUNNEL6
:
2652 addrconf_ip6_tnl_config(dev
);
2654 case ARPHRD_LOOPBACK
:
2659 addrconf_dev_config(dev
);
2665 addrconf_dad_run(idev
);
2668 * If the MTU changed during the interface down,
2669 * when the interface up, the changed MTU must be
2670 * reflected in the idev as well as routers.
2672 if (idev
->cnf
.mtu6
!= dev
->mtu
&&
2673 dev
->mtu
>= IPV6_MIN_MTU
) {
2674 rt6_mtu_change(dev
, dev
->mtu
);
2675 idev
->cnf
.mtu6
= dev
->mtu
;
2677 idev
->tstamp
= jiffies
;
2678 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2681 * If the changed mtu during down is lower than
2682 * IPV6_MIN_MTU stop IPv6 on this interface.
2684 if (dev
->mtu
< IPV6_MIN_MTU
)
2685 addrconf_ifdown(dev
, 1);
2689 case NETDEV_CHANGEMTU
:
2690 if (idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2691 rt6_mtu_change(dev
, dev
->mtu
);
2692 idev
->cnf
.mtu6
= dev
->mtu
;
2696 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2697 idev
= ipv6_add_dev(dev
);
2703 * MTU falled under IPV6_MIN_MTU.
2704 * Stop IPv6 on this interface.
2708 case NETDEV_UNREGISTER
:
2710 * Remove all addresses from this interface.
2712 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2715 case NETDEV_CHANGENAME
:
2717 snmp6_unregister_dev(idev
);
2718 addrconf_sysctl_unregister(idev
);
2719 addrconf_sysctl_register(idev
);
2720 err
= snmp6_register_dev(idev
);
2722 return notifier_from_errno(err
);
2726 case NETDEV_PRE_TYPE_CHANGE
:
2727 case NETDEV_POST_TYPE_CHANGE
:
2728 addrconf_type_change(dev
, event
);
2736 * addrconf module should be notified of a device going up
2738 static struct notifier_block ipv6_dev_notf
= {
2739 .notifier_call
= addrconf_notify
,
2742 static void addrconf_type_change(struct net_device
*dev
, unsigned long event
)
2744 struct inet6_dev
*idev
;
2747 idev
= __in6_dev_get(dev
);
2749 if (event
== NETDEV_POST_TYPE_CHANGE
)
2750 ipv6_mc_remap(idev
);
2751 else if (event
== NETDEV_PRE_TYPE_CHANGE
)
2752 ipv6_mc_unmap(idev
);
2755 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2757 struct net
*net
= dev_net(dev
);
2758 struct inet6_dev
*idev
;
2759 struct inet6_ifaddr
*ifa
;
2764 rt6_ifdown(net
, dev
);
2765 neigh_ifdown(&nd_tbl
, dev
);
2767 idev
= __in6_dev_get(dev
);
2772 * Step 1: remove reference to ipv6 device from parent device.
2778 /* protected by rtnl_lock */
2779 RCU_INIT_POINTER(dev
->ip6_ptr
, NULL
);
2781 /* Step 1.5: remove snmp6 entry */
2782 snmp6_unregister_dev(idev
);
2786 /* Step 2: clear hash table */
2787 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
2788 struct hlist_head
*h
= &inet6_addr_lst
[i
];
2789 struct hlist_node
*n
;
2791 spin_lock_bh(&addrconf_hash_lock
);
2793 hlist_for_each_entry_rcu(ifa
, n
, h
, addr_lst
) {
2794 if (ifa
->idev
== idev
) {
2795 hlist_del_init_rcu(&ifa
->addr_lst
);
2796 addrconf_del_timer(ifa
);
2800 spin_unlock_bh(&addrconf_hash_lock
);
2803 write_lock_bh(&idev
->lock
);
2805 /* Step 2: clear flags for stateless addrconf */
2807 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
2809 #ifdef CONFIG_IPV6_PRIVACY
2810 if (how
&& del_timer(&idev
->regen_timer
))
2813 /* Step 3: clear tempaddr list */
2814 while (!list_empty(&idev
->tempaddr_list
)) {
2815 ifa
= list_first_entry(&idev
->tempaddr_list
,
2816 struct inet6_ifaddr
, tmp_list
);
2817 list_del(&ifa
->tmp_list
);
2818 write_unlock_bh(&idev
->lock
);
2819 spin_lock_bh(&ifa
->lock
);
2822 in6_ifa_put(ifa
->ifpub
);
2825 spin_unlock_bh(&ifa
->lock
);
2827 write_lock_bh(&idev
->lock
);
2831 while (!list_empty(&idev
->addr_list
)) {
2832 ifa
= list_first_entry(&idev
->addr_list
,
2833 struct inet6_ifaddr
, if_list
);
2834 addrconf_del_timer(ifa
);
2836 list_del(&ifa
->if_list
);
2838 write_unlock_bh(&idev
->lock
);
2840 spin_lock_bh(&ifa
->state_lock
);
2842 ifa
->state
= INET6_IFADDR_STATE_DEAD
;
2843 spin_unlock_bh(&ifa
->state_lock
);
2845 if (state
!= INET6_IFADDR_STATE_DEAD
) {
2846 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
2847 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifa
);
2851 write_lock_bh(&idev
->lock
);
2854 write_unlock_bh(&idev
->lock
);
2856 /* Step 5: Discard multicast list */
2858 ipv6_mc_destroy_dev(idev
);
2862 idev
->tstamp
= jiffies
;
2864 /* Last: Shot the device (if unregistered) */
2866 addrconf_sysctl_unregister(idev
);
2867 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
2868 neigh_ifdown(&nd_tbl
, dev
);
2874 static void addrconf_rs_timer(unsigned long data
)
2876 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2877 struct inet6_dev
*idev
= ifp
->idev
;
2879 read_lock(&idev
->lock
);
2880 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
))
2883 if (idev
->cnf
.forwarding
)
2886 /* Announcement received after solicitation was sent */
2887 if (idev
->if_flags
& IF_RA_RCVD
)
2890 spin_lock(&ifp
->lock
);
2891 if (ifp
->probes
++ < idev
->cnf
.rtr_solicits
) {
2892 /* The wait after the last probe can be shorter */
2893 addrconf_mod_timer(ifp
, AC_RS
,
2894 (ifp
->probes
== idev
->cnf
.rtr_solicits
) ?
2895 idev
->cnf
.rtr_solicit_delay
:
2896 idev
->cnf
.rtr_solicit_interval
);
2897 spin_unlock(&ifp
->lock
);
2899 ndisc_send_rs(idev
->dev
, &ifp
->addr
, &in6addr_linklocal_allrouters
);
2901 spin_unlock(&ifp
->lock
);
2903 * Note: we do not support deprecated "all on-link"
2904 * assumption any longer.
2906 printk(KERN_DEBUG
"%s: no IPv6 routers present\n",
2911 read_unlock(&idev
->lock
);
2916 * Duplicate Address Detection
2918 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
2920 unsigned long rand_num
;
2921 struct inet6_dev
*idev
= ifp
->idev
;
2923 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
2926 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
2928 ifp
->probes
= idev
->cnf
.dad_transmits
;
2929 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
2932 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
)
2934 struct inet6_dev
*idev
= ifp
->idev
;
2935 struct net_device
*dev
= idev
->dev
;
2937 addrconf_join_solict(dev
, &ifp
->addr
);
2939 net_srandom(ifp
->addr
.s6_addr32
[3]);
2941 read_lock_bh(&idev
->lock
);
2942 spin_lock(&ifp
->lock
);
2943 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
)
2946 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
2947 idev
->cnf
.accept_dad
< 1 ||
2948 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
2949 ifp
->flags
& IFA_F_NODAD
) {
2950 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
2951 spin_unlock(&ifp
->lock
);
2952 read_unlock_bh(&idev
->lock
);
2954 addrconf_dad_completed(ifp
);
2958 if (!(idev
->if_flags
& IF_READY
)) {
2959 spin_unlock(&ifp
->lock
);
2960 read_unlock_bh(&idev
->lock
);
2962 * If the device is not ready:
2963 * - keep it tentative if it is a permanent address.
2964 * - otherwise, kill it.
2967 addrconf_dad_stop(ifp
, 0);
2972 * Optimistic nodes can start receiving
2975 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
2976 ip6_ins_rt(ifp
->rt
);
2978 addrconf_dad_kick(ifp
);
2980 spin_unlock(&ifp
->lock
);
2981 read_unlock_bh(&idev
->lock
);
2984 static void addrconf_dad_timer(unsigned long data
)
2986 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2987 struct inet6_dev
*idev
= ifp
->idev
;
2988 struct in6_addr mcaddr
;
2990 if (!ifp
->probes
&& addrconf_dad_end(ifp
))
2993 read_lock(&idev
->lock
);
2994 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
)) {
2995 read_unlock(&idev
->lock
);
2999 spin_lock(&ifp
->lock
);
3000 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
) {
3001 spin_unlock(&ifp
->lock
);
3002 read_unlock(&idev
->lock
);
3006 if (ifp
->probes
== 0) {
3008 * DAD was successful
3011 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
3012 spin_unlock(&ifp
->lock
);
3013 read_unlock(&idev
->lock
);
3015 addrconf_dad_completed(ifp
);
3021 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
3022 spin_unlock(&ifp
->lock
);
3023 read_unlock(&idev
->lock
);
3025 /* send a neighbour solicitation for our addr */
3026 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
3027 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &in6addr_any
);
3032 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
3034 struct net_device
*dev
= ifp
->idev
->dev
;
3037 * Configure the address for reception. Now it is valid.
3040 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
3042 /* If added prefix is link local and we are prepared to process
3043 router advertisements, start sending router solicitations.
3046 if (((ifp
->idev
->cnf
.accept_ra
== 1 && !ifp
->idev
->cnf
.forwarding
) ||
3047 ifp
->idev
->cnf
.accept_ra
== 2) &&
3048 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
3049 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
3050 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
3052 * If a host as already performed a random delay
3053 * [...] as part of DAD [...] there is no need
3054 * to delay again before sending the first RS
3056 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &in6addr_linklocal_allrouters
);
3058 spin_lock_bh(&ifp
->lock
);
3060 ifp
->idev
->if_flags
|= IF_RS_SENT
;
3061 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
3062 spin_unlock_bh(&ifp
->lock
);
3066 static void addrconf_dad_run(struct inet6_dev
*idev
)
3068 struct inet6_ifaddr
*ifp
;
3070 read_lock_bh(&idev
->lock
);
3071 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
3072 spin_lock(&ifp
->lock
);
3073 if (ifp
->flags
& IFA_F_TENTATIVE
&&
3074 ifp
->state
== INET6_IFADDR_STATE_DAD
)
3075 addrconf_dad_kick(ifp
);
3076 spin_unlock(&ifp
->lock
);
3078 read_unlock_bh(&idev
->lock
);
3081 #ifdef CONFIG_PROC_FS
3082 struct if6_iter_state
{
3083 struct seq_net_private p
;
3088 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
, loff_t pos
)
3090 struct inet6_ifaddr
*ifa
= NULL
;
3091 struct if6_iter_state
*state
= seq
->private;
3092 struct net
*net
= seq_file_net(seq
);
3095 /* initial bucket if pos is 0 */
3101 for (; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
3102 struct hlist_node
*n
;
3103 hlist_for_each_entry_rcu_bh(ifa
, n
, &inet6_addr_lst
[state
->bucket
],
3105 /* sync with offset */
3106 if (p
< state
->offset
) {
3111 if (net_eq(dev_net(ifa
->idev
->dev
), net
))
3115 /* prepare for next bucket */
3122 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
,
3123 struct inet6_ifaddr
*ifa
)
3125 struct if6_iter_state
*state
= seq
->private;
3126 struct net
*net
= seq_file_net(seq
);
3127 struct hlist_node
*n
= &ifa
->addr_lst
;
3129 hlist_for_each_entry_continue_rcu_bh(ifa
, n
, addr_lst
) {
3131 if (net_eq(dev_net(ifa
->idev
->dev
), net
))
3135 while (++state
->bucket
< IN6_ADDR_HSIZE
) {
3137 hlist_for_each_entry_rcu_bh(ifa
, n
,
3138 &inet6_addr_lst
[state
->bucket
], addr_lst
) {
3140 if (net_eq(dev_net(ifa
->idev
->dev
), net
))
3148 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
3152 return if6_get_first(seq
, *pos
);
3155 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
3157 struct inet6_ifaddr
*ifa
;
3159 ifa
= if6_get_next(seq
, v
);
3164 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
3167 rcu_read_unlock_bh();
3170 static int if6_seq_show(struct seq_file
*seq
, void *v
)
3172 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
3173 seq_printf(seq
, "%pi6 %02x %02x %02x %02x %8s\n",
3175 ifp
->idev
->dev
->ifindex
,
3179 ifp
->idev
->dev
->name
);
3183 static const struct seq_operations if6_seq_ops
= {
3184 .start
= if6_seq_start
,
3185 .next
= if6_seq_next
,
3186 .show
= if6_seq_show
,
3187 .stop
= if6_seq_stop
,
3190 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
3192 return seq_open_net(inode
, file
, &if6_seq_ops
,
3193 sizeof(struct if6_iter_state
));
3196 static const struct file_operations if6_fops
= {
3197 .owner
= THIS_MODULE
,
3198 .open
= if6_seq_open
,
3200 .llseek
= seq_lseek
,
3201 .release
= seq_release_net
,
3204 static int __net_init
if6_proc_net_init(struct net
*net
)
3206 if (!proc_net_fops_create(net
, "if_inet6", S_IRUGO
, &if6_fops
))
3211 static void __net_exit
if6_proc_net_exit(struct net
*net
)
3213 proc_net_remove(net
, "if_inet6");
3216 static struct pernet_operations if6_proc_net_ops
= {
3217 .init
= if6_proc_net_init
,
3218 .exit
= if6_proc_net_exit
,
3221 int __init
if6_proc_init(void)
3223 return register_pernet_subsys(&if6_proc_net_ops
);
3226 void if6_proc_exit(void)
3228 unregister_pernet_subsys(&if6_proc_net_ops
);
3230 #endif /* CONFIG_PROC_FS */
3232 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3233 /* Check if address is a home address configured on any interface. */
3234 int ipv6_chk_home_addr(struct net
*net
, const struct in6_addr
*addr
)
3237 struct inet6_ifaddr
*ifp
= NULL
;
3238 struct hlist_node
*n
;
3239 unsigned int hash
= ipv6_addr_hash(addr
);
3242 hlist_for_each_entry_rcu_bh(ifp
, n
, &inet6_addr_lst
[hash
], addr_lst
) {
3243 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
3245 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
3246 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
3251 rcu_read_unlock_bh();
3257 * Periodic address status verification
3260 static void addrconf_verify(unsigned long foo
)
3262 unsigned long now
, next
, next_sec
, next_sched
;
3263 struct inet6_ifaddr
*ifp
;
3264 struct hlist_node
*node
;
3268 spin_lock(&addrconf_verify_lock
);
3270 next
= round_jiffies_up(now
+ ADDR_CHECK_FREQUENCY
);
3272 del_timer(&addr_chk_timer
);
3274 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
3276 hlist_for_each_entry_rcu_bh(ifp
, node
,
3277 &inet6_addr_lst
[i
], addr_lst
) {
3280 if (ifp
->flags
& IFA_F_PERMANENT
)
3283 spin_lock(&ifp
->lock
);
3284 /* We try to batch several events at once. */
3285 age
= (now
- ifp
->tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
3287 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
3288 age
>= ifp
->valid_lft
) {
3289 spin_unlock(&ifp
->lock
);
3293 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
3294 spin_unlock(&ifp
->lock
);
3296 } else if (age
>= ifp
->prefered_lft
) {
3297 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
3300 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
3302 ifp
->flags
|= IFA_F_DEPRECATED
;
3305 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
3306 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
3308 spin_unlock(&ifp
->lock
);
3313 ipv6_ifa_notify(0, ifp
);
3317 #ifdef CONFIG_IPV6_PRIVACY
3318 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
3319 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
3320 unsigned long regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
3321 ifp
->idev
->cnf
.dad_transmits
*
3322 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
3324 if (age
>= ifp
->prefered_lft
- regen_advance
) {
3325 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
3326 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3327 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3328 if (!ifp
->regen_count
&& ifpub
) {
3331 in6_ifa_hold(ifpub
);
3332 spin_unlock(&ifp
->lock
);
3334 spin_lock(&ifpub
->lock
);
3335 ifpub
->regen_count
= 0;
3336 spin_unlock(&ifpub
->lock
);
3337 ipv6_create_tempaddr(ifpub
, ifp
);
3342 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
3343 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
3344 spin_unlock(&ifp
->lock
);
3347 /* ifp->prefered_lft <= ifp->valid_lft */
3348 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3349 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3350 spin_unlock(&ifp
->lock
);
3355 next_sec
= round_jiffies_up(next
);
3358 /* If rounded timeout is accurate enough, accept it. */
3359 if (time_before(next_sec
, next
+ ADDRCONF_TIMER_FUZZ
))
3360 next_sched
= next_sec
;
3362 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
3363 if (time_before(next_sched
, jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
))
3364 next_sched
= jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
;
3366 ADBG((KERN_DEBUG
"now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
3367 now
, next
, next_sec
, next_sched
));
3369 addr_chk_timer
.expires
= next_sched
;
3370 add_timer(&addr_chk_timer
);
3371 spin_unlock(&addrconf_verify_lock
);
3372 rcu_read_unlock_bh();
3375 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
)
3377 struct in6_addr
*pfx
= NULL
;
3380 pfx
= nla_data(addr
);
3383 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
3386 pfx
= nla_data(local
);
3392 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
3393 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
3394 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
3395 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
3399 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3401 struct net
*net
= sock_net(skb
->sk
);
3402 struct ifaddrmsg
*ifm
;
3403 struct nlattr
*tb
[IFA_MAX
+1];
3404 struct in6_addr
*pfx
;
3407 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3411 ifm
= nlmsg_data(nlh
);
3412 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3416 return inet6_addr_del(net
, ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
3419 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u8 ifa_flags
,
3420 u32 prefered_lft
, u32 valid_lft
)
3424 unsigned long timeout
;
3426 if (!valid_lft
|| (prefered_lft
> valid_lft
))
3429 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
3430 if (addrconf_finite_timeout(timeout
)) {
3431 expires
= jiffies_to_clock_t(timeout
* HZ
);
3432 valid_lft
= timeout
;
3433 flags
= RTF_EXPIRES
;
3437 ifa_flags
|= IFA_F_PERMANENT
;
3440 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
3441 if (addrconf_finite_timeout(timeout
)) {
3443 ifa_flags
|= IFA_F_DEPRECATED
;
3444 prefered_lft
= timeout
;
3447 spin_lock_bh(&ifp
->lock
);
3448 ifp
->flags
= (ifp
->flags
& ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
| IFA_F_HOMEADDRESS
)) | ifa_flags
;
3449 ifp
->tstamp
= jiffies
;
3450 ifp
->valid_lft
= valid_lft
;
3451 ifp
->prefered_lft
= prefered_lft
;
3453 spin_unlock_bh(&ifp
->lock
);
3454 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
3455 ipv6_ifa_notify(0, ifp
);
3457 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
3465 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3467 struct net
*net
= sock_net(skb
->sk
);
3468 struct ifaddrmsg
*ifm
;
3469 struct nlattr
*tb
[IFA_MAX
+1];
3470 struct in6_addr
*pfx
;
3471 struct inet6_ifaddr
*ifa
;
3472 struct net_device
*dev
;
3473 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
3477 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3481 ifm
= nlmsg_data(nlh
);
3482 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3486 if (tb
[IFA_CACHEINFO
]) {
3487 struct ifa_cacheinfo
*ci
;
3489 ci
= nla_data(tb
[IFA_CACHEINFO
]);
3490 valid_lft
= ci
->ifa_valid
;
3491 preferred_lft
= ci
->ifa_prefered
;
3493 preferred_lft
= INFINITY_LIFE_TIME
;
3494 valid_lft
= INFINITY_LIFE_TIME
;
3497 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3501 /* We ignore other flags so far. */
3502 ifa_flags
= ifm
->ifa_flags
& (IFA_F_NODAD
| IFA_F_HOMEADDRESS
);
3504 ifa
= ipv6_get_ifaddr(net
, pfx
, dev
, 1);
3507 * It would be best to check for !NLM_F_CREATE here but
3508 * userspace alreay relies on not having to provide this.
3510 return inet6_addr_add(net
, ifm
->ifa_index
, pfx
,
3511 ifm
->ifa_prefixlen
, ifa_flags
,
3512 preferred_lft
, valid_lft
);
3515 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
3516 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
3519 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
3526 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u8 flags
,
3527 u8 scope
, int ifindex
)
3529 struct ifaddrmsg
*ifm
;
3531 ifm
= nlmsg_data(nlh
);
3532 ifm
->ifa_family
= AF_INET6
;
3533 ifm
->ifa_prefixlen
= prefixlen
;
3534 ifm
->ifa_flags
= flags
;
3535 ifm
->ifa_scope
= scope
;
3536 ifm
->ifa_index
= ifindex
;
3539 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
3540 unsigned long tstamp
, u32 preferred
, u32 valid
)
3542 struct ifa_cacheinfo ci
;
3544 ci
.cstamp
= cstamp_delta(cstamp
);
3545 ci
.tstamp
= cstamp_delta(tstamp
);
3546 ci
.ifa_prefered
= preferred
;
3547 ci
.ifa_valid
= valid
;
3549 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
3552 static inline int rt_scope(int ifa_scope
)
3554 if (ifa_scope
& IFA_HOST
)
3555 return RT_SCOPE_HOST
;
3556 else if (ifa_scope
& IFA_LINK
)
3557 return RT_SCOPE_LINK
;
3558 else if (ifa_scope
& IFA_SITE
)
3559 return RT_SCOPE_SITE
;
3561 return RT_SCOPE_UNIVERSE
;
3564 static inline int inet6_ifaddr_msgsize(void)
3566 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
3567 + nla_total_size(16) /* IFA_ADDRESS */
3568 + nla_total_size(sizeof(struct ifa_cacheinfo
));
3571 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
3572 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3574 struct nlmsghdr
*nlh
;
3575 u32 preferred
, valid
;
3577 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3581 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
3582 ifa
->idev
->dev
->ifindex
);
3584 if (!(ifa
->flags
&IFA_F_PERMANENT
)) {
3585 preferred
= ifa
->prefered_lft
;
3586 valid
= ifa
->valid_lft
;
3587 if (preferred
!= INFINITY_LIFE_TIME
) {
3588 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
3589 if (preferred
> tval
)
3593 if (valid
!= INFINITY_LIFE_TIME
) {
3601 preferred
= INFINITY_LIFE_TIME
;
3602 valid
= INFINITY_LIFE_TIME
;
3605 if (nla_put(skb
, IFA_ADDRESS
, 16, &ifa
->addr
) < 0 ||
3606 put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0) {
3607 nlmsg_cancel(skb
, nlh
);
3611 return nlmsg_end(skb
, nlh
);
3614 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
3615 u32 pid
, u32 seq
, int event
, u16 flags
)
3617 struct nlmsghdr
*nlh
;
3618 u8 scope
= RT_SCOPE_UNIVERSE
;
3619 int ifindex
= ifmca
->idev
->dev
->ifindex
;
3621 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
3622 scope
= RT_SCOPE_SITE
;
3624 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3628 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3629 if (nla_put(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
) < 0 ||
3630 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
3631 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3632 nlmsg_cancel(skb
, nlh
);
3636 return nlmsg_end(skb
, nlh
);
3639 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
3640 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3642 struct nlmsghdr
*nlh
;
3643 u8 scope
= RT_SCOPE_UNIVERSE
;
3644 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
3646 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
3647 scope
= RT_SCOPE_SITE
;
3649 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3653 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3654 if (nla_put(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
) < 0 ||
3655 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
3656 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3657 nlmsg_cancel(skb
, nlh
);
3661 return nlmsg_end(skb
, nlh
);
3670 /* called with rcu_read_lock() */
3671 static int in6_dump_addrs(struct inet6_dev
*idev
, struct sk_buff
*skb
,
3672 struct netlink_callback
*cb
, enum addr_type_t type
,
3673 int s_ip_idx
, int *p_ip_idx
)
3675 struct ifmcaddr6
*ifmca
;
3676 struct ifacaddr6
*ifaca
;
3678 int ip_idx
= *p_ip_idx
;
3680 read_lock_bh(&idev
->lock
);
3682 case UNICAST_ADDR
: {
3683 struct inet6_ifaddr
*ifa
;
3685 /* unicast address incl. temp addr */
3686 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
3687 if (++ip_idx
< s_ip_idx
)
3689 err
= inet6_fill_ifaddr(skb
, ifa
,
3690 NETLINK_CB(cb
->skb
).pid
,
3699 case MULTICAST_ADDR
:
3700 /* multicast address */
3701 for (ifmca
= idev
->mc_list
; ifmca
;
3702 ifmca
= ifmca
->next
, ip_idx
++) {
3703 if (ip_idx
< s_ip_idx
)
3705 err
= inet6_fill_ifmcaddr(skb
, ifmca
,
3706 NETLINK_CB(cb
->skb
).pid
,
3715 /* anycast address */
3716 for (ifaca
= idev
->ac_list
; ifaca
;
3717 ifaca
= ifaca
->aca_next
, ip_idx
++) {
3718 if (ip_idx
< s_ip_idx
)
3720 err
= inet6_fill_ifacaddr(skb
, ifaca
,
3721 NETLINK_CB(cb
->skb
).pid
,
3732 read_unlock_bh(&idev
->lock
);
3737 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3738 enum addr_type_t type
)
3740 struct net
*net
= sock_net(skb
->sk
);
3743 int s_idx
, s_ip_idx
;
3744 struct net_device
*dev
;
3745 struct inet6_dev
*idev
;
3746 struct hlist_head
*head
;
3747 struct hlist_node
*node
;
3750 s_idx
= idx
= cb
->args
[1];
3751 s_ip_idx
= ip_idx
= cb
->args
[2];
3754 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
3756 head
= &net
->dev_index_head
[h
];
3757 hlist_for_each_entry_rcu(dev
, node
, head
, index_hlist
) {
3760 if (h
> s_h
|| idx
> s_idx
)
3763 idev
= __in6_dev_get(dev
);
3767 if (in6_dump_addrs(idev
, skb
, cb
, type
,
3768 s_ip_idx
, &ip_idx
) <= 0)
3778 cb
->args
[2] = ip_idx
;
3783 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3785 enum addr_type_t type
= UNICAST_ADDR
;
3787 return inet6_dump_addr(skb
, cb
, type
);
3790 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3792 enum addr_type_t type
= MULTICAST_ADDR
;
3794 return inet6_dump_addr(skb
, cb
, type
);
3798 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3800 enum addr_type_t type
= ANYCAST_ADDR
;
3802 return inet6_dump_addr(skb
, cb
, type
);
3805 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
*nlh
,
3808 struct net
*net
= sock_net(in_skb
->sk
);
3809 struct ifaddrmsg
*ifm
;
3810 struct nlattr
*tb
[IFA_MAX
+1];
3811 struct in6_addr
*addr
= NULL
;
3812 struct net_device
*dev
= NULL
;
3813 struct inet6_ifaddr
*ifa
;
3814 struct sk_buff
*skb
;
3817 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3821 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3827 ifm
= nlmsg_data(nlh
);
3829 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3831 ifa
= ipv6_get_ifaddr(net
, addr
, dev
, 1);
3833 err
= -EADDRNOTAVAIL
;
3837 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
);
3843 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).pid
,
3844 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
3846 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3847 WARN_ON(err
== -EMSGSIZE
);
3851 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).pid
);
3858 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
3860 struct sk_buff
*skb
;
3861 struct net
*net
= dev_net(ifa
->idev
->dev
);
3864 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
3868 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
3870 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3871 WARN_ON(err
== -EMSGSIZE
);
3875 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3879 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
3882 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
3883 __s32
*array
, int bytes
)
3885 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
3887 memset(array
, 0, bytes
);
3888 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
3889 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
3890 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
3891 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
3892 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
3893 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
3894 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
3895 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
3896 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] =
3897 jiffies_to_msecs(cnf
->rtr_solicit_interval
);
3898 array
[DEVCONF_RTR_SOLICIT_DELAY
] =
3899 jiffies_to_msecs(cnf
->rtr_solicit_delay
);
3900 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
3901 #ifdef CONFIG_IPV6_PRIVACY
3902 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
3903 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
3904 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
3905 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
3906 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
3908 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
3909 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
3910 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
3911 #ifdef CONFIG_IPV6_ROUTER_PREF
3912 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
3913 array
[DEVCONF_RTR_PROBE_INTERVAL
] =
3914 jiffies_to_msecs(cnf
->rtr_probe_interval
);
3915 #ifdef CONFIG_IPV6_ROUTE_INFO
3916 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
3919 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
3920 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
3921 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3922 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
3924 #ifdef CONFIG_IPV6_MROUTE
3925 array
[DEVCONF_MC_FORWARDING
] = cnf
->mc_forwarding
;
3927 array
[DEVCONF_DISABLE_IPV6
] = cnf
->disable_ipv6
;
3928 array
[DEVCONF_ACCEPT_DAD
] = cnf
->accept_dad
;
3929 array
[DEVCONF_FORCE_TLLAO
] = cnf
->force_tllao
;
3932 static inline size_t inet6_ifla6_size(void)
3934 return nla_total_size(4) /* IFLA_INET6_FLAGS */
3935 + nla_total_size(sizeof(struct ifla_cacheinfo
))
3936 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
3937 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
3938 + nla_total_size(ICMP6_MIB_MAX
* 8); /* IFLA_INET6_ICMP6STATS */
3941 static inline size_t inet6_if_nlmsg_size(void)
3943 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
3944 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
3945 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
3946 + nla_total_size(4) /* IFLA_MTU */
3947 + nla_total_size(4) /* IFLA_LINK */
3948 + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
3951 static inline void __snmp6_fill_statsdev(u64
*stats
, atomic_long_t
*mib
,
3952 int items
, int bytes
)
3955 int pad
= bytes
- sizeof(u64
) * items
;
3958 /* Use put_unaligned() because stats may not be aligned for u64. */
3959 put_unaligned(items
, &stats
[0]);
3960 for (i
= 1; i
< items
; i
++)
3961 put_unaligned(atomic_long_read(&mib
[i
]), &stats
[i
]);
3963 memset(&stats
[items
], 0, pad
);
3966 static inline void __snmp6_fill_stats64(u64
*stats
, void __percpu
**mib
,
3967 int items
, int bytes
, size_t syncpoff
)
3970 int pad
= bytes
- sizeof(u64
) * items
;
3973 /* Use put_unaligned() because stats may not be aligned for u64. */
3974 put_unaligned(items
, &stats
[0]);
3975 for (i
= 1; i
< items
; i
++)
3976 put_unaligned(snmp_fold_field64(mib
, i
, syncpoff
), &stats
[i
]);
3978 memset(&stats
[items
], 0, pad
);
3981 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
3985 case IFLA_INET6_STATS
:
3986 __snmp6_fill_stats64(stats
, (void __percpu
**)idev
->stats
.ipv6
,
3987 IPSTATS_MIB_MAX
, bytes
, offsetof(struct ipstats_mib
, syncp
));
3989 case IFLA_INET6_ICMP6STATS
:
3990 __snmp6_fill_statsdev(stats
, idev
->stats
.icmpv6dev
->mibs
, ICMP6_MIB_MAX
, bytes
);
3995 static int inet6_fill_ifla6_attrs(struct sk_buff
*skb
, struct inet6_dev
*idev
)
3998 struct ifla_cacheinfo ci
;
4000 if (nla_put_u32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
))
4001 goto nla_put_failure
;
4002 ci
.max_reasm_len
= IPV6_MAXPLEN
;
4003 ci
.tstamp
= cstamp_delta(idev
->tstamp
);
4004 ci
.reachable_time
= jiffies_to_msecs(idev
->nd_parms
->reachable_time
);
4005 ci
.retrans_time
= jiffies_to_msecs(idev
->nd_parms
->retrans_time
);
4006 if (nla_put(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
))
4007 goto nla_put_failure
;
4008 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
4010 goto nla_put_failure
;
4011 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
4013 /* XXX - MC not implemented */
4015 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
4017 goto nla_put_failure
;
4018 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
4020 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
4022 goto nla_put_failure
;
4023 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
4031 static size_t inet6_get_link_af_size(const struct net_device
*dev
)
4033 if (!__in6_dev_get(dev
))
4036 return inet6_ifla6_size();
4039 static int inet6_fill_link_af(struct sk_buff
*skb
, const struct net_device
*dev
)
4041 struct inet6_dev
*idev
= __in6_dev_get(dev
);
4046 if (inet6_fill_ifla6_attrs(skb
, idev
) < 0)
4052 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
4053 u32 pid
, u32 seq
, int event
, unsigned int flags
)
4055 struct net_device
*dev
= idev
->dev
;
4056 struct ifinfomsg
*hdr
;
4057 struct nlmsghdr
*nlh
;
4060 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*hdr
), flags
);
4064 hdr
= nlmsg_data(nlh
);
4065 hdr
->ifi_family
= AF_INET6
;
4067 hdr
->ifi_type
= dev
->type
;
4068 hdr
->ifi_index
= dev
->ifindex
;
4069 hdr
->ifi_flags
= dev_get_flags(dev
);
4070 hdr
->ifi_change
= 0;
4072 if (nla_put_string(skb
, IFLA_IFNAME
, dev
->name
) ||
4074 nla_put(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
)) ||
4075 nla_put_u32(skb
, IFLA_MTU
, dev
->mtu
) ||
4076 (dev
->ifindex
!= dev
->iflink
&&
4077 nla_put_u32(skb
, IFLA_LINK
, dev
->iflink
)))
4078 goto nla_put_failure
;
4079 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
4080 if (protoinfo
== NULL
)
4081 goto nla_put_failure
;
4083 if (inet6_fill_ifla6_attrs(skb
, idev
) < 0)
4084 goto nla_put_failure
;
4086 nla_nest_end(skb
, protoinfo
);
4087 return nlmsg_end(skb
, nlh
);
4090 nlmsg_cancel(skb
, nlh
);
4094 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4096 struct net
*net
= sock_net(skb
->sk
);
4099 struct net_device
*dev
;
4100 struct inet6_dev
*idev
;
4101 struct hlist_head
*head
;
4102 struct hlist_node
*node
;
4105 s_idx
= cb
->args
[1];
4108 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
4110 head
= &net
->dev_index_head
[h
];
4111 hlist_for_each_entry_rcu(dev
, node
, head
, index_hlist
) {
4114 idev
= __in6_dev_get(dev
);
4117 if (inet6_fill_ifinfo(skb
, idev
,
4118 NETLINK_CB(cb
->skb
).pid
,
4120 RTM_NEWLINK
, NLM_F_MULTI
) <= 0)
4134 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
4136 struct sk_buff
*skb
;
4137 struct net
*net
= dev_net(idev
->dev
);
4140 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
4144 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
4146 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
4147 WARN_ON(err
== -EMSGSIZE
);
4151 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFINFO
, NULL
, GFP_ATOMIC
);
4155 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFINFO
, err
);
4158 static inline size_t inet6_prefix_nlmsg_size(void)
4160 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
4161 + nla_total_size(sizeof(struct in6_addr
))
4162 + nla_total_size(sizeof(struct prefix_cacheinfo
));
4165 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
4166 struct prefix_info
*pinfo
, u32 pid
, u32 seq
,
4167 int event
, unsigned int flags
)
4169 struct prefixmsg
*pmsg
;
4170 struct nlmsghdr
*nlh
;
4171 struct prefix_cacheinfo ci
;
4173 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*pmsg
), flags
);
4177 pmsg
= nlmsg_data(nlh
);
4178 pmsg
->prefix_family
= AF_INET6
;
4179 pmsg
->prefix_pad1
= 0;
4180 pmsg
->prefix_pad2
= 0;
4181 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
4182 pmsg
->prefix_len
= pinfo
->prefix_len
;
4183 pmsg
->prefix_type
= pinfo
->type
;
4184 pmsg
->prefix_pad3
= 0;
4185 pmsg
->prefix_flags
= 0;
4187 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
4188 if (pinfo
->autoconf
)
4189 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
4191 if (nla_put(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
))
4192 goto nla_put_failure
;
4193 ci
.preferred_time
= ntohl(pinfo
->prefered
);
4194 ci
.valid_time
= ntohl(pinfo
->valid
);
4195 if (nla_put(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
))
4196 goto nla_put_failure
;
4197 return nlmsg_end(skb
, nlh
);
4200 nlmsg_cancel(skb
, nlh
);
4204 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
4205 struct prefix_info
*pinfo
)
4207 struct sk_buff
*skb
;
4208 struct net
*net
= dev_net(idev
->dev
);
4211 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
4215 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
4217 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
4218 WARN_ON(err
== -EMSGSIZE
);
4222 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
4226 rtnl_set_sk_err(net
, RTNLGRP_IPV6_PREFIX
, err
);
4229 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
4231 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
4236 * If the address was optimistic
4237 * we inserted the route at the start of
4238 * our DAD process, so we don't need
4241 if (!(ifp
->rt
->rt6i_node
))
4242 ip6_ins_rt(ifp
->rt
);
4243 if (ifp
->idev
->cnf
.forwarding
)
4244 addrconf_join_anycast(ifp
);
4247 if (ifp
->idev
->cnf
.forwarding
)
4248 addrconf_leave_anycast(ifp
);
4249 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
4250 dst_hold(&ifp
->rt
->dst
);
4252 if (ip6_del_rt(ifp
->rt
))
4253 dst_free(&ifp
->rt
->dst
);
4258 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
4261 if (likely(ifp
->idev
->dead
== 0))
4262 __ipv6_ifa_notify(event
, ifp
);
4263 rcu_read_unlock_bh();
4266 #ifdef CONFIG_SYSCTL
4269 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
,
4270 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4272 int *valp
= ctl
->data
;
4279 * ctl->data points to idev->cnf.forwarding, we should
4280 * not modify it until we get the rtnl lock.
4285 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
4288 ret
= addrconf_fixup_forwarding(ctl
, valp
, val
);
4294 static void dev_disable_change(struct inet6_dev
*idev
)
4296 if (!idev
|| !idev
->dev
)
4299 if (idev
->cnf
.disable_ipv6
)
4300 addrconf_notify(NULL
, NETDEV_DOWN
, idev
->dev
);
4302 addrconf_notify(NULL
, NETDEV_UP
, idev
->dev
);
4305 static void addrconf_disable_change(struct net
*net
, __s32 newf
)
4307 struct net_device
*dev
;
4308 struct inet6_dev
*idev
;
4311 for_each_netdev_rcu(net
, dev
) {
4312 idev
= __in6_dev_get(dev
);
4314 int changed
= (!idev
->cnf
.disable_ipv6
) ^ (!newf
);
4315 idev
->cnf
.disable_ipv6
= newf
;
4317 dev_disable_change(idev
);
4323 static int addrconf_disable_ipv6(struct ctl_table
*table
, int *p
, int newf
)
4328 if (!rtnl_trylock())
4329 return restart_syscall();
4331 net
= (struct net
*)table
->extra2
;
4335 if (p
== &net
->ipv6
.devconf_dflt
->disable_ipv6
) {
4340 if (p
== &net
->ipv6
.devconf_all
->disable_ipv6
) {
4341 net
->ipv6
.devconf_dflt
->disable_ipv6
= newf
;
4342 addrconf_disable_change(net
, newf
);
4343 } else if ((!newf
) ^ (!old
))
4344 dev_disable_change((struct inet6_dev
*)table
->extra1
);
4351 int addrconf_sysctl_disable(ctl_table
*ctl
, int write
,
4352 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4354 int *valp
= ctl
->data
;
4361 * ctl->data points to idev->cnf.disable_ipv6, we should
4362 * not modify it until we get the rtnl lock.
4367 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
4370 ret
= addrconf_disable_ipv6(ctl
, valp
, val
);
4376 static struct addrconf_sysctl_table
4378 struct ctl_table_header
*sysctl_header
;
4379 ctl_table addrconf_vars
[DEVCONF_MAX
+1];
4380 } addrconf_sysctl __read_mostly
= {
4381 .sysctl_header
= NULL
,
4384 .procname
= "forwarding",
4385 .data
= &ipv6_devconf
.forwarding
,
4386 .maxlen
= sizeof(int),
4388 .proc_handler
= addrconf_sysctl_forward
,
4391 .procname
= "hop_limit",
4392 .data
= &ipv6_devconf
.hop_limit
,
4393 .maxlen
= sizeof(int),
4395 .proc_handler
= proc_dointvec
,
4399 .data
= &ipv6_devconf
.mtu6
,
4400 .maxlen
= sizeof(int),
4402 .proc_handler
= proc_dointvec
,
4405 .procname
= "accept_ra",
4406 .data
= &ipv6_devconf
.accept_ra
,
4407 .maxlen
= sizeof(int),
4409 .proc_handler
= proc_dointvec
,
4412 .procname
= "accept_redirects",
4413 .data
= &ipv6_devconf
.accept_redirects
,
4414 .maxlen
= sizeof(int),
4416 .proc_handler
= proc_dointvec
,
4419 .procname
= "autoconf",
4420 .data
= &ipv6_devconf
.autoconf
,
4421 .maxlen
= sizeof(int),
4423 .proc_handler
= proc_dointvec
,
4426 .procname
= "dad_transmits",
4427 .data
= &ipv6_devconf
.dad_transmits
,
4428 .maxlen
= sizeof(int),
4430 .proc_handler
= proc_dointvec
,
4433 .procname
= "router_solicitations",
4434 .data
= &ipv6_devconf
.rtr_solicits
,
4435 .maxlen
= sizeof(int),
4437 .proc_handler
= proc_dointvec
,
4440 .procname
= "router_solicitation_interval",
4441 .data
= &ipv6_devconf
.rtr_solicit_interval
,
4442 .maxlen
= sizeof(int),
4444 .proc_handler
= proc_dointvec_jiffies
,
4447 .procname
= "router_solicitation_delay",
4448 .data
= &ipv6_devconf
.rtr_solicit_delay
,
4449 .maxlen
= sizeof(int),
4451 .proc_handler
= proc_dointvec_jiffies
,
4454 .procname
= "force_mld_version",
4455 .data
= &ipv6_devconf
.force_mld_version
,
4456 .maxlen
= sizeof(int),
4458 .proc_handler
= proc_dointvec
,
4460 #ifdef CONFIG_IPV6_PRIVACY
4462 .procname
= "use_tempaddr",
4463 .data
= &ipv6_devconf
.use_tempaddr
,
4464 .maxlen
= sizeof(int),
4466 .proc_handler
= proc_dointvec
,
4469 .procname
= "temp_valid_lft",
4470 .data
= &ipv6_devconf
.temp_valid_lft
,
4471 .maxlen
= sizeof(int),
4473 .proc_handler
= proc_dointvec
,
4476 .procname
= "temp_prefered_lft",
4477 .data
= &ipv6_devconf
.temp_prefered_lft
,
4478 .maxlen
= sizeof(int),
4480 .proc_handler
= proc_dointvec
,
4483 .procname
= "regen_max_retry",
4484 .data
= &ipv6_devconf
.regen_max_retry
,
4485 .maxlen
= sizeof(int),
4487 .proc_handler
= proc_dointvec
,
4490 .procname
= "max_desync_factor",
4491 .data
= &ipv6_devconf
.max_desync_factor
,
4492 .maxlen
= sizeof(int),
4494 .proc_handler
= proc_dointvec
,
4498 .procname
= "max_addresses",
4499 .data
= &ipv6_devconf
.max_addresses
,
4500 .maxlen
= sizeof(int),
4502 .proc_handler
= proc_dointvec
,
4505 .procname
= "accept_ra_defrtr",
4506 .data
= &ipv6_devconf
.accept_ra_defrtr
,
4507 .maxlen
= sizeof(int),
4509 .proc_handler
= proc_dointvec
,
4512 .procname
= "accept_ra_pinfo",
4513 .data
= &ipv6_devconf
.accept_ra_pinfo
,
4514 .maxlen
= sizeof(int),
4516 .proc_handler
= proc_dointvec
,
4518 #ifdef CONFIG_IPV6_ROUTER_PREF
4520 .procname
= "accept_ra_rtr_pref",
4521 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
4522 .maxlen
= sizeof(int),
4524 .proc_handler
= proc_dointvec
,
4527 .procname
= "router_probe_interval",
4528 .data
= &ipv6_devconf
.rtr_probe_interval
,
4529 .maxlen
= sizeof(int),
4531 .proc_handler
= proc_dointvec_jiffies
,
4533 #ifdef CONFIG_IPV6_ROUTE_INFO
4535 .procname
= "accept_ra_rt_info_max_plen",
4536 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
4537 .maxlen
= sizeof(int),
4539 .proc_handler
= proc_dointvec
,
4544 .procname
= "proxy_ndp",
4545 .data
= &ipv6_devconf
.proxy_ndp
,
4546 .maxlen
= sizeof(int),
4548 .proc_handler
= proc_dointvec
,
4551 .procname
= "accept_source_route",
4552 .data
= &ipv6_devconf
.accept_source_route
,
4553 .maxlen
= sizeof(int),
4555 .proc_handler
= proc_dointvec
,
4557 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4559 .procname
= "optimistic_dad",
4560 .data
= &ipv6_devconf
.optimistic_dad
,
4561 .maxlen
= sizeof(int),
4563 .proc_handler
= proc_dointvec
,
4567 #ifdef CONFIG_IPV6_MROUTE
4569 .procname
= "mc_forwarding",
4570 .data
= &ipv6_devconf
.mc_forwarding
,
4571 .maxlen
= sizeof(int),
4573 .proc_handler
= proc_dointvec
,
4577 .procname
= "disable_ipv6",
4578 .data
= &ipv6_devconf
.disable_ipv6
,
4579 .maxlen
= sizeof(int),
4581 .proc_handler
= addrconf_sysctl_disable
,
4584 .procname
= "accept_dad",
4585 .data
= &ipv6_devconf
.accept_dad
,
4586 .maxlen
= sizeof(int),
4588 .proc_handler
= proc_dointvec
,
4591 .procname
= "force_tllao",
4592 .data
= &ipv6_devconf
.force_tllao
,
4593 .maxlen
= sizeof(int),
4595 .proc_handler
= proc_dointvec
4603 static int __addrconf_sysctl_register(struct net
*net
, char *dev_name
,
4604 struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
4607 struct addrconf_sysctl_table
*t
;
4608 char path
[sizeof("net/ipv6/conf/") + IFNAMSIZ
];
4610 t
= kmemdup(&addrconf_sysctl
, sizeof(*t
), GFP_KERNEL
);
4614 for (i
= 0; t
->addrconf_vars
[i
].data
; i
++) {
4615 t
->addrconf_vars
[i
].data
+= (char *)p
- (char *)&ipv6_devconf
;
4616 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
4617 t
->addrconf_vars
[i
].extra2
= net
;
4620 snprintf(path
, sizeof(path
), "net/ipv6/conf/%s", dev_name
);
4622 t
->sysctl_header
= register_net_sysctl(net
, path
, t
->addrconf_vars
);
4623 if (t
->sysctl_header
== NULL
)
4635 static void __addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
4637 struct addrconf_sysctl_table
*t
;
4639 if (p
->sysctl
== NULL
)
4644 unregister_net_sysctl_table(t
->sysctl_header
);
4648 static void addrconf_sysctl_register(struct inet6_dev
*idev
)
4650 neigh_sysctl_register(idev
->dev
, idev
->nd_parms
, "ipv6",
4651 &ndisc_ifinfo_sysctl_change
);
4652 __addrconf_sysctl_register(dev_net(idev
->dev
), idev
->dev
->name
,
4656 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
4658 __addrconf_sysctl_unregister(&idev
->cnf
);
4659 neigh_sysctl_unregister(idev
->nd_parms
);
4665 static int __net_init
addrconf_init_net(struct net
*net
)
4668 struct ipv6_devconf
*all
, *dflt
;
4671 all
= &ipv6_devconf
;
4672 dflt
= &ipv6_devconf_dflt
;
4674 if (!net_eq(net
, &init_net
)) {
4675 all
= kmemdup(all
, sizeof(ipv6_devconf
), GFP_KERNEL
);
4679 dflt
= kmemdup(dflt
, sizeof(ipv6_devconf_dflt
), GFP_KERNEL
);
4681 goto err_alloc_dflt
;
4683 /* these will be inherited by all namespaces */
4684 dflt
->autoconf
= ipv6_defaults
.autoconf
;
4685 dflt
->disable_ipv6
= ipv6_defaults
.disable_ipv6
;
4688 net
->ipv6
.devconf_all
= all
;
4689 net
->ipv6
.devconf_dflt
= dflt
;
4691 #ifdef CONFIG_SYSCTL
4692 err
= __addrconf_sysctl_register(net
, "all", NULL
, all
);
4696 err
= __addrconf_sysctl_register(net
, "default", NULL
, dflt
);
4702 #ifdef CONFIG_SYSCTL
4704 __addrconf_sysctl_unregister(all
);
4714 static void __net_exit
addrconf_exit_net(struct net
*net
)
4716 #ifdef CONFIG_SYSCTL
4717 __addrconf_sysctl_unregister(net
->ipv6
.devconf_dflt
);
4718 __addrconf_sysctl_unregister(net
->ipv6
.devconf_all
);
4720 if (!net_eq(net
, &init_net
)) {
4721 kfree(net
->ipv6
.devconf_dflt
);
4722 kfree(net
->ipv6
.devconf_all
);
4726 static struct pernet_operations addrconf_ops
= {
4727 .init
= addrconf_init_net
,
4728 .exit
= addrconf_exit_net
,
4735 int register_inet6addr_notifier(struct notifier_block
*nb
)
4737 return atomic_notifier_chain_register(&inet6addr_chain
, nb
);
4739 EXPORT_SYMBOL(register_inet6addr_notifier
);
4741 int unregister_inet6addr_notifier(struct notifier_block
*nb
)
4743 return atomic_notifier_chain_unregister(&inet6addr_chain
, nb
);
4745 EXPORT_SYMBOL(unregister_inet6addr_notifier
);
4747 static struct rtnl_af_ops inet6_ops
= {
4749 .fill_link_af
= inet6_fill_link_af
,
4750 .get_link_af_size
= inet6_get_link_af_size
,
4754 * Init / cleanup code
4757 int __init
addrconf_init(void)
4761 err
= ipv6_addr_label_init();
4763 printk(KERN_CRIT
"IPv6 Addrconf:"
4764 " cannot initialize default policy table: %d.\n", err
);
4768 err
= register_pernet_subsys(&addrconf_ops
);
4772 /* The addrconf netdev notifier requires that loopback_dev
4773 * has it's ipv6 private information allocated and setup
4774 * before it can bring up and give link-local addresses
4775 * to other devices which are up.
4777 * Unfortunately, loopback_dev is not necessarily the first
4778 * entry in the global dev_base list of net devices. In fact,
4779 * it is likely to be the very last entry on that list.
4780 * So this causes the notifier registry below to try and
4781 * give link-local addresses to all devices besides loopback_dev
4782 * first, then loopback_dev, which cases all the non-loopback_dev
4783 * devices to fail to get a link-local address.
4785 * So, as a temporary fix, allocate the ipv6 structure for
4786 * loopback_dev first by hand.
4787 * Longer term, all of the dependencies ipv6 has upon the loopback
4788 * device and it being up should be removed.
4791 if (!ipv6_add_dev(init_net
.loopback_dev
))
4797 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
4798 INIT_HLIST_HEAD(&inet6_addr_lst
[i
]);
4800 register_netdevice_notifier(&ipv6_dev_notf
);
4804 err
= rtnl_af_register(&inet6_ops
);
4808 err
= __rtnl_register(PF_INET6
, RTM_GETLINK
, NULL
, inet6_dump_ifinfo
,
4813 /* Only the first call to __rtnl_register can fail */
4814 __rtnl_register(PF_INET6
, RTM_NEWADDR
, inet6_rtm_newaddr
, NULL
, NULL
);
4815 __rtnl_register(PF_INET6
, RTM_DELADDR
, inet6_rtm_deladdr
, NULL
, NULL
);
4816 __rtnl_register(PF_INET6
, RTM_GETADDR
, inet6_rtm_getaddr
,
4817 inet6_dump_ifaddr
, NULL
);
4818 __rtnl_register(PF_INET6
, RTM_GETMULTICAST
, NULL
,
4819 inet6_dump_ifmcaddr
, NULL
);
4820 __rtnl_register(PF_INET6
, RTM_GETANYCAST
, NULL
,
4821 inet6_dump_ifacaddr
, NULL
);
4823 ipv6_addr_label_rtnl_register();
4827 rtnl_af_unregister(&inet6_ops
);
4829 unregister_netdevice_notifier(&ipv6_dev_notf
);
4831 unregister_pernet_subsys(&addrconf_ops
);
4833 ipv6_addr_label_cleanup();
4838 void addrconf_cleanup(void)
4840 struct net_device
*dev
;
4843 unregister_netdevice_notifier(&ipv6_dev_notf
);
4844 unregister_pernet_subsys(&addrconf_ops
);
4845 ipv6_addr_label_cleanup();
4849 __rtnl_af_unregister(&inet6_ops
);
4851 /* clean dev list */
4852 for_each_netdev(&init_net
, dev
) {
4853 if (__in6_dev_get(dev
) == NULL
)
4855 addrconf_ifdown(dev
, 1);
4857 addrconf_ifdown(init_net
.loopback_dev
, 2);
4862 spin_lock_bh(&addrconf_hash_lock
);
4863 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
4864 WARN_ON(!hlist_empty(&inet6_addr_lst
[i
]));
4865 spin_unlock_bh(&addrconf_hash_lock
);
4867 del_timer(&addr_chk_timer
);