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 #define pr_fmt(fmt) "IPv6: " fmt
43 #include <linux/errno.h>
44 #include <linux/types.h>
45 #include <linux/kernel.h>
46 #include <linux/socket.h>
47 #include <linux/sockios.h>
48 #include <linux/net.h>
49 #include <linux/in6.h>
50 #include <linux/netdevice.h>
51 #include <linux/if_addr.h>
52 #include <linux/if_arp.h>
53 #include <linux/if_arcnet.h>
54 #include <linux/if_infiniband.h>
55 #include <linux/route.h>
56 #include <linux/inetdevice.h>
57 #include <linux/init.h>
58 #include <linux/slab.h>
60 #include <linux/sysctl.h>
62 #include <linux/capability.h>
63 #include <linux/delay.h>
64 #include <linux/notifier.h>
65 #include <linux/string.h>
67 #include <net/net_namespace.h>
71 #include <net/af_ieee802154.h>
73 #include <net/protocol.h>
74 #include <net/ndisc.h>
75 #include <net/ip6_route.h>
76 #include <net/addrconf.h>
79 #include <net/netlink.h>
80 #include <net/pkt_sched.h>
81 #include <linux/if_tunnel.h>
82 #include <linux/rtnetlink.h>
84 #ifdef CONFIG_IPV6_PRIVACY
85 #include <linux/random.h>
88 #include <linux/uaccess.h>
89 #include <asm/unaligned.h>
91 #include <linux/proc_fs.h>
92 #include <linux/seq_file.h>
93 #include <linux/export.h>
95 /* Set to 3 to get tracing... */
99 #define ADBG(x) printk x
104 #define INFINITY_LIFE_TIME 0xFFFFFFFF
106 static inline u32
cstamp_delta(unsigned long cstamp
)
108 return (cstamp
- INITIAL_JIFFIES
) * 100UL / HZ
;
111 #define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ/50 : 1)
112 #define ADDRCONF_TIMER_FUZZ (HZ / 4)
113 #define ADDRCONF_TIMER_FUZZ_MAX (HZ)
116 static void addrconf_sysctl_register(struct inet6_dev
*idev
);
117 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
);
119 static inline void addrconf_sysctl_register(struct inet6_dev
*idev
)
123 static inline void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
128 #ifdef CONFIG_IPV6_PRIVACY
129 static int __ipv6_regen_rndid(struct inet6_dev
*idev
);
130 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
131 static void ipv6_regen_rndid(unsigned long data
);
134 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
);
135 static int ipv6_count_addresses(struct inet6_dev
*idev
);
138 * Configured unicast address hash table
140 static struct hlist_head inet6_addr_lst
[IN6_ADDR_HSIZE
];
141 static DEFINE_SPINLOCK(addrconf_hash_lock
);
143 static void addrconf_verify(unsigned long);
145 static DEFINE_TIMER(addr_chk_timer
, addrconf_verify
, 0, 0);
146 static DEFINE_SPINLOCK(addrconf_verify_lock
);
148 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
149 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
151 static void addrconf_type_change(struct net_device
*dev
,
152 unsigned long event
);
153 static int addrconf_ifdown(struct net_device
*dev
, int how
);
155 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
);
156 static void addrconf_dad_timer(unsigned long data
);
157 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
);
158 static void addrconf_dad_run(struct inet6_dev
*idev
);
159 static void addrconf_rs_timer(unsigned long data
);
160 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
161 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
163 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
164 struct prefix_info
*pinfo
);
165 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
166 struct net_device
*dev
);
168 static ATOMIC_NOTIFIER_HEAD(inet6addr_chain
);
170 static struct ipv6_devconf ipv6_devconf __read_mostly
= {
172 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
173 .mtu6
= IPV6_MIN_MTU
,
175 .accept_redirects
= 1,
177 .force_mld_version
= 0,
179 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
180 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
181 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
182 #ifdef CONFIG_IPV6_PRIVACY
184 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
185 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
186 .regen_max_retry
= REGEN_MAX_RETRY
,
187 .max_desync_factor
= MAX_DESYNC_FACTOR
,
189 .max_addresses
= IPV6_MAX_ADDRESSES
,
190 .accept_ra_defrtr
= 1,
191 .accept_ra_pinfo
= 1,
192 #ifdef CONFIG_IPV6_ROUTER_PREF
193 .accept_ra_rtr_pref
= 1,
194 .rtr_probe_interval
= 60 * HZ
,
195 #ifdef CONFIG_IPV6_ROUTE_INFO
196 .accept_ra_rt_info_max_plen
= 0,
200 .accept_source_route
= 0, /* we do not accept RH0 by default. */
205 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly
= {
207 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
208 .mtu6
= IPV6_MIN_MTU
,
210 .accept_redirects
= 1,
213 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
214 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
215 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
216 #ifdef CONFIG_IPV6_PRIVACY
218 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
219 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
220 .regen_max_retry
= REGEN_MAX_RETRY
,
221 .max_desync_factor
= MAX_DESYNC_FACTOR
,
223 .max_addresses
= IPV6_MAX_ADDRESSES
,
224 .accept_ra_defrtr
= 1,
225 .accept_ra_pinfo
= 1,
226 #ifdef CONFIG_IPV6_ROUTER_PREF
227 .accept_ra_rtr_pref
= 1,
228 .rtr_probe_interval
= 60 * HZ
,
229 #ifdef CONFIG_IPV6_ROUTE_INFO
230 .accept_ra_rt_info_max_plen
= 0,
234 .accept_source_route
= 0, /* we do not accept RH0 by default. */
239 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
240 const struct in6_addr in6addr_any
= IN6ADDR_ANY_INIT
;
241 const struct in6_addr in6addr_loopback
= IN6ADDR_LOOPBACK_INIT
;
242 const struct in6_addr in6addr_linklocal_allnodes
= IN6ADDR_LINKLOCAL_ALLNODES_INIT
;
243 const struct in6_addr in6addr_linklocal_allrouters
= IN6ADDR_LINKLOCAL_ALLROUTERS_INIT
;
245 /* Check if a valid qdisc is available */
246 static inline bool addrconf_qdisc_ok(const struct net_device
*dev
)
248 return !qdisc_tx_is_noop(dev
);
251 /* Check if a route is valid prefix route */
252 static inline int addrconf_is_prefix_route(const struct rt6_info
*rt
)
254 return (rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0;
257 static void addrconf_del_timer(struct inet6_ifaddr
*ifp
)
259 if (del_timer(&ifp
->timer
))
263 enum addrconf_timer_t
{
269 static void addrconf_mod_timer(struct inet6_ifaddr
*ifp
,
270 enum addrconf_timer_t what
,
273 if (!del_timer(&ifp
->timer
))
278 ifp
->timer
.function
= addrconf_dad_timer
;
281 ifp
->timer
.function
= addrconf_rs_timer
;
286 ifp
->timer
.expires
= jiffies
+ when
;
287 add_timer(&ifp
->timer
);
290 static int snmp6_alloc_dev(struct inet6_dev
*idev
)
292 if (snmp_mib_init((void __percpu
**)idev
->stats
.ipv6
,
293 sizeof(struct ipstats_mib
),
294 __alignof__(struct ipstats_mib
)) < 0)
296 idev
->stats
.icmpv6dev
= kzalloc(sizeof(struct icmpv6_mib_device
),
298 if (!idev
->stats
.icmpv6dev
)
300 idev
->stats
.icmpv6msgdev
= kzalloc(sizeof(struct icmpv6msg_mib_device
),
302 if (!idev
->stats
.icmpv6msgdev
)
308 kfree(idev
->stats
.icmpv6dev
);
310 snmp_mib_free((void __percpu
**)idev
->stats
.ipv6
);
315 static void snmp6_free_dev(struct inet6_dev
*idev
)
317 kfree(idev
->stats
.icmpv6msgdev
);
318 kfree(idev
->stats
.icmpv6dev
);
319 snmp_mib_free((void __percpu
**)idev
->stats
.ipv6
);
322 /* Nobody refers to this device, we may destroy it. */
324 void in6_dev_finish_destroy(struct inet6_dev
*idev
)
326 struct net_device
*dev
= idev
->dev
;
328 WARN_ON(!list_empty(&idev
->addr_list
));
329 WARN_ON(idev
->mc_list
!= NULL
);
331 #ifdef NET_REFCNT_DEBUG
332 pr_debug("%s: %s\n", __func__
, dev
? dev
->name
: "NIL");
336 pr_warn("Freeing alive inet6 device %p\n", idev
);
339 snmp6_free_dev(idev
);
340 kfree_rcu(idev
, rcu
);
342 EXPORT_SYMBOL(in6_dev_finish_destroy
);
344 static struct inet6_dev
*ipv6_add_dev(struct net_device
*dev
)
346 struct inet6_dev
*ndev
;
350 if (dev
->mtu
< IPV6_MIN_MTU
)
353 ndev
= kzalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
358 rwlock_init(&ndev
->lock
);
360 INIT_LIST_HEAD(&ndev
->addr_list
);
362 memcpy(&ndev
->cnf
, dev_net(dev
)->ipv6
.devconf_dflt
, sizeof(ndev
->cnf
));
363 ndev
->cnf
.mtu6
= dev
->mtu
;
364 ndev
->cnf
.sysctl
= NULL
;
365 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
366 if (ndev
->nd_parms
== NULL
) {
370 if (ndev
->cnf
.forwarding
)
371 dev_disable_lro(dev
);
372 /* We refer to the device */
375 if (snmp6_alloc_dev(ndev
) < 0) {
377 "%s: cannot allocate memory for statistics; dev=%s.\n",
378 __func__
, dev
->name
));
379 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
385 if (snmp6_register_dev(ndev
) < 0) {
387 "%s: cannot create /proc/net/dev_snmp6/%s\n",
388 __func__
, dev
->name
));
389 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
391 in6_dev_finish_destroy(ndev
);
395 /* One reference from device. We must do this before
396 * we invoke __ipv6_regen_rndid().
400 if (dev
->flags
& (IFF_NOARP
| IFF_LOOPBACK
))
401 ndev
->cnf
.accept_dad
= -1;
403 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
404 if (dev
->type
== ARPHRD_SIT
&& (dev
->priv_flags
& IFF_ISATAP
)) {
405 pr_info("%s: Disabled Multicast RS\n", dev
->name
);
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 pr_debug("%s\n", __func__
);
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_warn("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
);
844 pr_info("%s: use_tempaddr is disabled\n", __func__
);
849 spin_lock_bh(&ifp
->lock
);
850 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
851 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
852 spin_unlock_bh(&ifp
->lock
);
853 write_unlock(&idev
->lock
);
854 pr_warn("%s: regeneration time exceeded - disabled temporary address support\n",
861 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
862 if (__ipv6_try_regen_rndid(idev
, tmpaddr
) < 0) {
863 spin_unlock_bh(&ifp
->lock
);
864 write_unlock(&idev
->lock
);
865 pr_warn("%s: regeneration of randomized interface id failed\n",
872 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
873 age
= (now
- ifp
->tstamp
) / HZ
;
874 tmp_valid_lft
= min_t(__u32
,
876 idev
->cnf
.temp_valid_lft
+ age
);
877 tmp_prefered_lft
= min_t(__u32
,
879 idev
->cnf
.temp_prefered_lft
+ age
-
880 idev
->cnf
.max_desync_factor
);
881 tmp_plen
= ifp
->prefix_len
;
882 max_addresses
= idev
->cnf
.max_addresses
;
883 tmp_tstamp
= ifp
->tstamp
;
884 spin_unlock_bh(&ifp
->lock
);
886 regen_advance
= idev
->cnf
.regen_max_retry
*
887 idev
->cnf
.dad_transmits
*
888 idev
->nd_parms
->retrans_time
/ HZ
;
889 write_unlock(&idev
->lock
);
891 /* A temporary address is created only if this calculated Preferred
892 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
893 * an implementation must not create a temporary address with a zero
894 * Preferred Lifetime.
896 if (tmp_prefered_lft
<= regen_advance
) {
903 addr_flags
= IFA_F_TEMPORARY
;
904 /* set in addrconf_prefix_rcv() */
905 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
906 addr_flags
|= IFA_F_OPTIMISTIC
;
908 ift
= !max_addresses
||
909 ipv6_count_addresses(idev
) < max_addresses
?
910 ipv6_add_addr(idev
, &addr
, tmp_plen
,
911 ipv6_addr_type(&addr
)&IPV6_ADDR_SCOPE_MASK
,
913 if (!ift
|| IS_ERR(ift
)) {
916 pr_info("%s: retry temporary address regeneration\n", __func__
);
918 write_lock(&idev
->lock
);
922 spin_lock_bh(&ift
->lock
);
924 ift
->valid_lft
= tmp_valid_lft
;
925 ift
->prefered_lft
= tmp_prefered_lft
;
927 ift
->tstamp
= tmp_tstamp
;
928 spin_unlock_bh(&ift
->lock
);
930 addrconf_dad_start(ift
);
939 * Choose an appropriate source address (RFC3484)
942 IPV6_SADDR_RULE_INIT
= 0,
943 IPV6_SADDR_RULE_LOCAL
,
944 IPV6_SADDR_RULE_SCOPE
,
945 IPV6_SADDR_RULE_PREFERRED
,
946 #ifdef CONFIG_IPV6_MIP6
950 IPV6_SADDR_RULE_LABEL
,
951 #ifdef CONFIG_IPV6_PRIVACY
952 IPV6_SADDR_RULE_PRIVACY
,
954 IPV6_SADDR_RULE_ORCHID
,
955 IPV6_SADDR_RULE_PREFIX
,
959 struct ipv6_saddr_score
{
962 struct inet6_ifaddr
*ifa
;
963 DECLARE_BITMAP(scorebits
, IPV6_SADDR_RULE_MAX
);
968 struct ipv6_saddr_dst
{
969 const struct in6_addr
*addr
;
976 static inline int ipv6_saddr_preferred(int type
)
978 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|IPV6_ADDR_LOOPBACK
))
983 static int ipv6_get_saddr_eval(struct net
*net
,
984 struct ipv6_saddr_score
*score
,
985 struct ipv6_saddr_dst
*dst
,
990 if (i
<= score
->rule
) {
992 case IPV6_SADDR_RULE_SCOPE
:
993 ret
= score
->scopedist
;
995 case IPV6_SADDR_RULE_PREFIX
:
996 ret
= score
->matchlen
;
999 ret
= !!test_bit(i
, score
->scorebits
);
1005 case IPV6_SADDR_RULE_INIT
:
1006 /* Rule 0: remember if hiscore is not ready yet */
1009 case IPV6_SADDR_RULE_LOCAL
:
1010 /* Rule 1: Prefer same address */
1011 ret
= ipv6_addr_equal(&score
->ifa
->addr
, dst
->addr
);
1013 case IPV6_SADDR_RULE_SCOPE
:
1014 /* Rule 2: Prefer appropriate scope
1019 * ---+--+-+---> scope
1021 * | d is scope of the destination.
1023 * | \ <- smaller scope is better if
1024 * B-15 | \ if scope is enough for destinaion.
1025 * | ret = B - scope (-1 <= scope >= d <= 15).
1027 * |/ <- greater is better
1028 * -C / if scope is not enough for destination.
1029 * /| ret = scope - C (-1 <= d < scope <= 15).
1031 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1032 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1033 * Assume B = 0 and we get C > 29.
1035 ret
= __ipv6_addr_src_scope(score
->addr_type
);
1036 if (ret
>= dst
->scope
)
1039 ret
-= 128; /* 30 is enough */
1040 score
->scopedist
= ret
;
1042 case IPV6_SADDR_RULE_PREFERRED
:
1043 /* Rule 3: Avoid deprecated and optimistic addresses */
1044 ret
= ipv6_saddr_preferred(score
->addr_type
) ||
1045 !(score
->ifa
->flags
& (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
));
1047 #ifdef CONFIG_IPV6_MIP6
1048 case IPV6_SADDR_RULE_HOA
:
1050 /* Rule 4: Prefer home address */
1051 int prefhome
= !(dst
->prefs
& IPV6_PREFER_SRC_COA
);
1052 ret
= !(score
->ifa
->flags
& IFA_F_HOMEADDRESS
) ^ prefhome
;
1056 case IPV6_SADDR_RULE_OIF
:
1057 /* Rule 5: Prefer outgoing interface */
1058 ret
= (!dst
->ifindex
||
1059 dst
->ifindex
== score
->ifa
->idev
->dev
->ifindex
);
1061 case IPV6_SADDR_RULE_LABEL
:
1062 /* Rule 6: Prefer matching label */
1063 ret
= ipv6_addr_label(net
,
1064 &score
->ifa
->addr
, score
->addr_type
,
1065 score
->ifa
->idev
->dev
->ifindex
) == dst
->label
;
1067 #ifdef CONFIG_IPV6_PRIVACY
1068 case IPV6_SADDR_RULE_PRIVACY
:
1070 /* Rule 7: Prefer public address
1071 * Note: prefer temporary address if use_tempaddr >= 2
1073 int preftmp
= dst
->prefs
& (IPV6_PREFER_SRC_PUBLIC
|IPV6_PREFER_SRC_TMP
) ?
1074 !!(dst
->prefs
& IPV6_PREFER_SRC_TMP
) :
1075 score
->ifa
->idev
->cnf
.use_tempaddr
>= 2;
1076 ret
= (!(score
->ifa
->flags
& IFA_F_TEMPORARY
)) ^ preftmp
;
1080 case IPV6_SADDR_RULE_ORCHID
:
1081 /* Rule 8-: Prefer ORCHID vs ORCHID or
1082 * non-ORCHID vs non-ORCHID
1084 ret
= !(ipv6_addr_orchid(&score
->ifa
->addr
) ^
1085 ipv6_addr_orchid(dst
->addr
));
1087 case IPV6_SADDR_RULE_PREFIX
:
1088 /* Rule 8: Use longest matching prefix */
1089 score
->matchlen
= ret
= ipv6_addr_diff(&score
->ifa
->addr
,
1097 __set_bit(i
, score
->scorebits
);
1103 int ipv6_dev_get_saddr(struct net
*net
, struct net_device
*dst_dev
,
1104 const struct in6_addr
*daddr
, unsigned int prefs
,
1105 struct in6_addr
*saddr
)
1107 struct ipv6_saddr_score scores
[2],
1108 *score
= &scores
[0], *hiscore
= &scores
[1];
1109 struct ipv6_saddr_dst dst
;
1110 struct net_device
*dev
;
1113 dst_type
= __ipv6_addr_type(daddr
);
1115 dst
.ifindex
= dst_dev
? dst_dev
->ifindex
: 0;
1116 dst
.scope
= __ipv6_addr_src_scope(dst_type
);
1117 dst
.label
= ipv6_addr_label(net
, daddr
, dst_type
, dst
.ifindex
);
1121 hiscore
->ifa
= NULL
;
1125 for_each_netdev_rcu(net
, dev
) {
1126 struct inet6_dev
*idev
;
1128 /* Candidate Source Address (section 4)
1129 * - multicast and link-local destination address,
1130 * the set of candidate source address MUST only
1131 * include addresses assigned to interfaces
1132 * belonging to the same link as the outgoing
1134 * (- For site-local destination addresses, the
1135 * set of candidate source addresses MUST only
1136 * include addresses assigned to interfaces
1137 * belonging to the same site as the outgoing
1140 if (((dst_type
& IPV6_ADDR_MULTICAST
) ||
1141 dst
.scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
) &&
1142 dst
.ifindex
&& dev
->ifindex
!= dst
.ifindex
)
1145 idev
= __in6_dev_get(dev
);
1149 read_lock_bh(&idev
->lock
);
1150 list_for_each_entry(score
->ifa
, &idev
->addr_list
, if_list
) {
1154 * - Tentative Address (RFC2462 section 5.4)
1155 * - A tentative address is not considered
1156 * "assigned to an interface" in the traditional
1157 * sense, unless it is also flagged as optimistic.
1158 * - Candidate Source Address (section 4)
1159 * - In any case, anycast addresses, multicast
1160 * addresses, and the unspecified address MUST
1161 * NOT be included in a candidate set.
1163 if ((score
->ifa
->flags
& IFA_F_TENTATIVE
) &&
1164 (!(score
->ifa
->flags
& IFA_F_OPTIMISTIC
)))
1167 score
->addr_type
= __ipv6_addr_type(&score
->ifa
->addr
);
1169 if (unlikely(score
->addr_type
== IPV6_ADDR_ANY
||
1170 score
->addr_type
& IPV6_ADDR_MULTICAST
)) {
1171 LIMIT_NETDEBUG(KERN_DEBUG
1172 "ADDRCONF: unspecified / multicast address "
1173 "assigned as unicast address on %s",
1179 bitmap_zero(score
->scorebits
, IPV6_SADDR_RULE_MAX
);
1181 for (i
= 0; i
< IPV6_SADDR_RULE_MAX
; i
++) {
1182 int minihiscore
, miniscore
;
1184 minihiscore
= ipv6_get_saddr_eval(net
, hiscore
, &dst
, i
);
1185 miniscore
= ipv6_get_saddr_eval(net
, score
, &dst
, i
);
1187 if (minihiscore
> miniscore
) {
1188 if (i
== IPV6_SADDR_RULE_SCOPE
&&
1189 score
->scopedist
> 0) {
1192 * each remaining entry
1193 * has too small (not enough)
1194 * scope, because ifa entries
1195 * are sorted by their scope
1201 } else if (minihiscore
< miniscore
) {
1203 in6_ifa_put(hiscore
->ifa
);
1205 in6_ifa_hold(score
->ifa
);
1207 swap(hiscore
, score
);
1209 /* restore our iterator */
1210 score
->ifa
= hiscore
->ifa
;
1217 read_unlock_bh(&idev
->lock
);
1222 return -EADDRNOTAVAIL
;
1224 *saddr
= hiscore
->ifa
->addr
;
1225 in6_ifa_put(hiscore
->ifa
);
1228 EXPORT_SYMBOL(ipv6_dev_get_saddr
);
1230 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1231 unsigned char banned_flags
)
1233 struct inet6_dev
*idev
;
1234 int err
= -EADDRNOTAVAIL
;
1237 idev
= __in6_dev_get(dev
);
1239 struct inet6_ifaddr
*ifp
;
1241 read_lock_bh(&idev
->lock
);
1242 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
1243 if (ifp
->scope
== IFA_LINK
&&
1244 !(ifp
->flags
& banned_flags
)) {
1250 read_unlock_bh(&idev
->lock
);
1256 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1259 struct inet6_ifaddr
*ifp
;
1261 read_lock_bh(&idev
->lock
);
1262 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
)
1264 read_unlock_bh(&idev
->lock
);
1268 int ipv6_chk_addr(struct net
*net
, const struct in6_addr
*addr
,
1269 struct net_device
*dev
, int strict
)
1271 struct inet6_ifaddr
*ifp
;
1272 struct hlist_node
*node
;
1273 unsigned int hash
= ipv6_addr_hash(addr
);
1276 hlist_for_each_entry_rcu(ifp
, node
, &inet6_addr_lst
[hash
], addr_lst
) {
1277 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1279 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1280 !(ifp
->flags
&IFA_F_TENTATIVE
) &&
1281 (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1282 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))) {
1283 rcu_read_unlock_bh();
1288 rcu_read_unlock_bh();
1291 EXPORT_SYMBOL(ipv6_chk_addr
);
1293 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
1294 struct net_device
*dev
)
1296 unsigned int hash
= ipv6_addr_hash(addr
);
1297 struct inet6_ifaddr
*ifp
;
1298 struct hlist_node
*node
;
1300 hlist_for_each_entry(ifp
, node
, &inet6_addr_lst
[hash
], addr_lst
) {
1301 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1303 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1304 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1311 int ipv6_chk_prefix(const struct in6_addr
*addr
, struct net_device
*dev
)
1313 struct inet6_dev
*idev
;
1314 struct inet6_ifaddr
*ifa
;
1319 idev
= __in6_dev_get(dev
);
1321 read_lock_bh(&idev
->lock
);
1322 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
1323 onlink
= ipv6_prefix_equal(addr
, &ifa
->addr
,
1328 read_unlock_bh(&idev
->lock
);
1333 EXPORT_SYMBOL(ipv6_chk_prefix
);
1335 struct inet6_ifaddr
*ipv6_get_ifaddr(struct net
*net
, const struct in6_addr
*addr
,
1336 struct net_device
*dev
, int strict
)
1338 struct inet6_ifaddr
*ifp
, *result
= NULL
;
1339 unsigned int hash
= ipv6_addr_hash(addr
);
1340 struct hlist_node
*node
;
1343 hlist_for_each_entry_rcu_bh(ifp
, node
, &inet6_addr_lst
[hash
], addr_lst
) {
1344 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1346 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1347 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1348 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1355 rcu_read_unlock_bh();
1360 /* Gets referenced address, destroys ifaddr */
1362 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
, int dad_failed
)
1364 if (ifp
->flags
&IFA_F_PERMANENT
) {
1365 spin_lock_bh(&ifp
->lock
);
1366 addrconf_del_timer(ifp
);
1367 ifp
->flags
|= IFA_F_TENTATIVE
;
1369 ifp
->flags
|= IFA_F_DADFAILED
;
1370 spin_unlock_bh(&ifp
->lock
);
1372 ipv6_ifa_notify(0, ifp
);
1374 #ifdef CONFIG_IPV6_PRIVACY
1375 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1376 struct inet6_ifaddr
*ifpub
;
1377 spin_lock_bh(&ifp
->lock
);
1380 in6_ifa_hold(ifpub
);
1381 spin_unlock_bh(&ifp
->lock
);
1382 ipv6_create_tempaddr(ifpub
, ifp
);
1385 spin_unlock_bh(&ifp
->lock
);
1393 static int addrconf_dad_end(struct inet6_ifaddr
*ifp
)
1397 spin_lock(&ifp
->state_lock
);
1398 if (ifp
->state
== INET6_IFADDR_STATE_DAD
) {
1399 ifp
->state
= INET6_IFADDR_STATE_POSTDAD
;
1402 spin_unlock(&ifp
->state_lock
);
1407 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1409 struct inet6_dev
*idev
= ifp
->idev
;
1411 if (addrconf_dad_end(ifp
)) {
1416 net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n",
1417 ifp
->idev
->dev
->name
, &ifp
->addr
);
1419 if (idev
->cnf
.accept_dad
> 1 && !idev
->cnf
.disable_ipv6
) {
1420 struct in6_addr addr
;
1422 addr
.s6_addr32
[0] = htonl(0xfe800000);
1423 addr
.s6_addr32
[1] = 0;
1425 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) &&
1426 ipv6_addr_equal(&ifp
->addr
, &addr
)) {
1427 /* DAD failed for link-local based on MAC address */
1428 idev
->cnf
.disable_ipv6
= 1;
1430 pr_info("%s: IPv6 being disabled!\n",
1431 ifp
->idev
->dev
->name
);
1435 addrconf_dad_stop(ifp
, 1);
1438 /* Join to solicited addr multicast group. */
1440 void addrconf_join_solict(struct net_device
*dev
, const struct in6_addr
*addr
)
1442 struct in6_addr maddr
;
1444 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1447 addrconf_addr_solict_mult(addr
, &maddr
);
1448 ipv6_dev_mc_inc(dev
, &maddr
);
1451 void addrconf_leave_solict(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
1453 struct in6_addr maddr
;
1455 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1458 addrconf_addr_solict_mult(addr
, &maddr
);
1459 __ipv6_dev_mc_dec(idev
, &maddr
);
1462 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1464 struct in6_addr addr
;
1465 if (ifp
->prefix_len
== 127) /* RFC 6164 */
1467 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1468 if (ipv6_addr_any(&addr
))
1470 ipv6_dev_ac_inc(ifp
->idev
->dev
, &addr
);
1473 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1475 struct in6_addr addr
;
1476 if (ifp
->prefix_len
== 127) /* RFC 6164 */
1478 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1479 if (ipv6_addr_any(&addr
))
1481 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1484 static int addrconf_ifid_eui48(u8
*eui
, struct net_device
*dev
)
1486 if (dev
->addr_len
!= ETH_ALEN
)
1488 memcpy(eui
, dev
->dev_addr
, 3);
1489 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1492 * The zSeries OSA network cards can be shared among various
1493 * OS instances, but the OSA cards have only one MAC address.
1494 * This leads to duplicate address conflicts in conjunction
1495 * with IPv6 if more than one instance uses the same card.
1497 * The driver for these cards can deliver a unique 16-bit
1498 * identifier for each instance sharing the same card. It is
1499 * placed instead of 0xFFFE in the interface identifier. The
1500 * "u" bit of the interface identifier is not inverted in this
1501 * case. Hence the resulting interface identifier has local
1502 * scope according to RFC2373.
1505 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1506 eui
[4] = dev
->dev_id
& 0xFF;
1515 static int addrconf_ifid_eui64(u8
*eui
, struct net_device
*dev
)
1517 if (dev
->addr_len
!= IEEE802154_ADDR_LEN
)
1519 memcpy(eui
, dev
->dev_addr
, 8);
1523 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
1525 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1526 if (dev
->addr_len
!= ARCNET_ALEN
)
1529 eui
[7] = *(u8
*)dev
->dev_addr
;
1533 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
1535 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1537 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1542 static int __ipv6_isatap_ifid(u8
*eui
, __be32 addr
)
1546 eui
[0] = (ipv4_is_zeronet(addr
) || ipv4_is_private_10(addr
) ||
1547 ipv4_is_loopback(addr
) || ipv4_is_linklocal_169(addr
) ||
1548 ipv4_is_private_172(addr
) || ipv4_is_test_192(addr
) ||
1549 ipv4_is_anycast_6to4(addr
) || ipv4_is_private_192(addr
) ||
1550 ipv4_is_test_198(addr
) || ipv4_is_multicast(addr
) ||
1551 ipv4_is_lbcast(addr
)) ? 0x00 : 0x02;
1555 memcpy(eui
+ 4, &addr
, 4);
1559 static int addrconf_ifid_sit(u8
*eui
, struct net_device
*dev
)
1561 if (dev
->priv_flags
& IFF_ISATAP
)
1562 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
1566 static int addrconf_ifid_gre(u8
*eui
, struct net_device
*dev
)
1568 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
1571 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1573 switch (dev
->type
) {
1576 return addrconf_ifid_eui48(eui
, dev
);
1578 return addrconf_ifid_arcnet(eui
, dev
);
1579 case ARPHRD_INFINIBAND
:
1580 return addrconf_ifid_infiniband(eui
, dev
);
1582 return addrconf_ifid_sit(eui
, dev
);
1584 return addrconf_ifid_gre(eui
, dev
);
1585 case ARPHRD_IEEE802154
:
1586 return addrconf_ifid_eui64(eui
, dev
);
1591 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1594 struct inet6_ifaddr
*ifp
;
1596 read_lock_bh(&idev
->lock
);
1597 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
1598 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1599 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1604 read_unlock_bh(&idev
->lock
);
1608 #ifdef CONFIG_IPV6_PRIVACY
1609 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1610 static int __ipv6_regen_rndid(struct inet6_dev
*idev
)
1613 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
1614 idev
->rndid
[0] &= ~0x02;
1617 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1618 * check if generated address is not inappropriate
1620 * - Reserved subnet anycast (RFC 2526)
1621 * 11111101 11....11 1xxxxxxx
1622 * - ISATAP (RFC4214) 6.1
1623 * 00-00-5E-FE-xx-xx-xx-xx
1625 * - XXX: already assigned to an address on the device
1627 if (idev
->rndid
[0] == 0xfd &&
1628 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1629 (idev
->rndid
[7]&0x80))
1631 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1632 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1634 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1641 static void ipv6_regen_rndid(unsigned long data
)
1643 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1644 unsigned long expires
;
1647 write_lock_bh(&idev
->lock
);
1652 if (__ipv6_regen_rndid(idev
) < 0)
1656 idev
->cnf
.temp_prefered_lft
* HZ
-
1657 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
-
1658 idev
->cnf
.max_desync_factor
* HZ
;
1659 if (time_before(expires
, jiffies
)) {
1660 pr_warn("%s: too short regeneration interval; timer disabled for %s\n",
1661 __func__
, idev
->dev
->name
);
1665 if (!mod_timer(&idev
->regen_timer
, expires
))
1669 write_unlock_bh(&idev
->lock
);
1670 rcu_read_unlock_bh();
1674 static int __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
)
1678 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1679 ret
= __ipv6_regen_rndid(idev
);
1689 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1690 unsigned long expires
, u32 flags
)
1692 struct fib6_config cfg
= {
1693 .fc_table
= RT6_TABLE_PREFIX
,
1694 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1695 .fc_ifindex
= dev
->ifindex
,
1696 .fc_expires
= expires
,
1698 .fc_flags
= RTF_UP
| flags
,
1699 .fc_nlinfo
.nl_net
= dev_net(dev
),
1700 .fc_protocol
= RTPROT_KERNEL
,
1705 /* Prevent useless cloning on PtP SIT.
1706 This thing is done here expecting that the whole
1707 class of non-broadcast devices need not cloning.
1709 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1710 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
1711 cfg
.fc_flags
|= RTF_NONEXTHOP
;
1714 ip6_route_add(&cfg
);
1718 static struct rt6_info
*addrconf_get_prefix_route(const struct in6_addr
*pfx
,
1720 const struct net_device
*dev
,
1721 u32 flags
, u32 noflags
)
1723 struct fib6_node
*fn
;
1724 struct rt6_info
*rt
= NULL
;
1725 struct fib6_table
*table
;
1727 table
= fib6_get_table(dev_net(dev
), RT6_TABLE_PREFIX
);
1731 write_lock_bh(&table
->tb6_lock
);
1732 fn
= fib6_locate(&table
->tb6_root
, pfx
, plen
, NULL
, 0);
1735 for (rt
= fn
->leaf
; rt
; rt
= rt
->dst
.rt6_next
) {
1736 if (rt
->dst
.dev
->ifindex
!= dev
->ifindex
)
1738 if ((rt
->rt6i_flags
& flags
) != flags
)
1740 if ((noflags
!= 0) && ((rt
->rt6i_flags
& flags
) != 0))
1746 write_unlock_bh(&table
->tb6_lock
);
1751 /* Create "default" multicast route to the interface */
1753 static void addrconf_add_mroute(struct net_device
*dev
)
1755 struct fib6_config cfg
= {
1756 .fc_table
= RT6_TABLE_LOCAL
,
1757 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1758 .fc_ifindex
= dev
->ifindex
,
1761 .fc_nlinfo
.nl_net
= dev_net(dev
),
1764 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
1766 ip6_route_add(&cfg
);
1769 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
1770 static void sit_route_add(struct net_device
*dev
)
1772 struct fib6_config cfg
= {
1773 .fc_table
= RT6_TABLE_MAIN
,
1774 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1775 .fc_ifindex
= dev
->ifindex
,
1777 .fc_flags
= RTF_UP
| RTF_NONEXTHOP
,
1778 .fc_nlinfo
.nl_net
= dev_net(dev
),
1781 /* prefix length - 96 bits "::d.d.d.d" */
1782 ip6_route_add(&cfg
);
1786 static void addrconf_add_lroute(struct net_device
*dev
)
1788 struct in6_addr addr
;
1790 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
1791 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
1794 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
1796 struct inet6_dev
*idev
;
1800 idev
= ipv6_find_idev(dev
);
1802 return ERR_PTR(-ENOBUFS
);
1804 if (idev
->cnf
.disable_ipv6
)
1805 return ERR_PTR(-EACCES
);
1807 /* Add default multicast route */
1808 if (!(dev
->flags
& IFF_LOOPBACK
))
1809 addrconf_add_mroute(dev
);
1811 /* Add link local route */
1812 addrconf_add_lroute(dev
);
1816 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
, bool sllao
)
1818 struct prefix_info
*pinfo
;
1822 struct inet6_dev
*in6_dev
;
1823 struct net
*net
= dev_net(dev
);
1825 pinfo
= (struct prefix_info
*) opt
;
1827 if (len
< sizeof(struct prefix_info
)) {
1828 ADBG(("addrconf: prefix option too short\n"));
1833 * Validation checks ([ADDRCONF], page 19)
1836 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
1838 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
1841 valid_lft
= ntohl(pinfo
->valid
);
1842 prefered_lft
= ntohl(pinfo
->prefered
);
1844 if (prefered_lft
> valid_lft
) {
1845 net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n");
1849 in6_dev
= in6_dev_get(dev
);
1851 if (in6_dev
== NULL
) {
1852 net_dbg_ratelimited("addrconf: device %s not configured\n",
1858 * Two things going on here:
1859 * 1) Add routes for on-link prefixes
1860 * 2) Configure prefixes with the auto flag set
1863 if (pinfo
->onlink
) {
1864 struct rt6_info
*rt
;
1865 unsigned long rt_expires
;
1867 /* Avoid arithmetic overflow. Really, we could
1868 * save rt_expires in seconds, likely valid_lft,
1869 * but it would require division in fib gc, that it
1873 rt_expires
= addrconf_timeout_fixup(valid_lft
, HZ
);
1875 rt_expires
= addrconf_timeout_fixup(valid_lft
, USER_HZ
);
1877 if (addrconf_finite_timeout(rt_expires
))
1880 rt
= addrconf_get_prefix_route(&pinfo
->prefix
,
1883 RTF_ADDRCONF
| RTF_PREFIX_RT
,
1884 RTF_GATEWAY
| RTF_DEFAULT
);
1887 /* Autoconf prefix route */
1888 if (valid_lft
== 0) {
1891 } else if (addrconf_finite_timeout(rt_expires
)) {
1893 rt6_set_expires(rt
, jiffies
+ rt_expires
);
1895 rt6_clean_expires(rt
);
1897 } else if (valid_lft
) {
1898 clock_t expires
= 0;
1899 int flags
= RTF_ADDRCONF
| RTF_PREFIX_RT
;
1900 if (addrconf_finite_timeout(rt_expires
)) {
1902 flags
|= RTF_EXPIRES
;
1903 expires
= jiffies_to_clock_t(rt_expires
);
1905 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
1906 dev
, expires
, flags
);
1909 dst_release(&rt
->dst
);
1912 /* Try to figure out our local address for this prefix */
1914 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
1915 struct inet6_ifaddr
*ifp
;
1916 struct in6_addr addr
;
1917 int create
= 0, update_lft
= 0;
1919 if (pinfo
->prefix_len
== 64) {
1920 memcpy(&addr
, &pinfo
->prefix
, 8);
1921 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
1922 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
1923 in6_dev_put(in6_dev
);
1928 net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n",
1930 in6_dev_put(in6_dev
);
1935 ifp
= ipv6_get_ifaddr(net
, &addr
, dev
, 1);
1937 if (ifp
== NULL
&& valid_lft
) {
1938 int max_addresses
= in6_dev
->cnf
.max_addresses
;
1941 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
1942 if (in6_dev
->cnf
.optimistic_dad
&&
1943 !net
->ipv6
.devconf_all
->forwarding
&& sllao
)
1944 addr_flags
= IFA_F_OPTIMISTIC
;
1947 /* Do not allow to create too much of autoconfigured
1948 * addresses; this would be too easy way to crash kernel.
1950 if (!max_addresses
||
1951 ipv6_count_addresses(in6_dev
) < max_addresses
)
1952 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
1953 addr_type
&IPV6_ADDR_SCOPE_MASK
,
1956 if (!ifp
|| IS_ERR(ifp
)) {
1957 in6_dev_put(in6_dev
);
1961 update_lft
= create
= 1;
1962 ifp
->cstamp
= jiffies
;
1963 addrconf_dad_start(ifp
);
1969 #ifdef CONFIG_IPV6_PRIVACY
1970 struct inet6_ifaddr
*ift
;
1974 /* update lifetime (RFC2462 5.5.3 e) */
1975 spin_lock(&ifp
->lock
);
1977 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
1978 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
1981 if (!update_lft
&& stored_lft
) {
1982 if (valid_lft
> MIN_VALID_LIFETIME
||
1983 valid_lft
> stored_lft
)
1985 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
1986 /* valid_lft <= stored_lft is always true */
1988 * RFC 4862 Section 5.5.3e:
1989 * "Note that the preferred lifetime of
1990 * the corresponding address is always
1991 * reset to the Preferred Lifetime in
1992 * the received Prefix Information
1993 * option, regardless of whether the
1994 * valid lifetime is also reset or
1997 * So if the preferred lifetime in
1998 * this advertisement is different
1999 * than what we have stored, but the
2000 * valid lifetime is invalid, just
2001 * reset prefered_lft.
2003 * We must set the valid lifetime
2004 * to the stored lifetime since we'll
2005 * be updating the timestamp below,
2006 * else we'll set it back to the
2009 if (prefered_lft
!= ifp
->prefered_lft
) {
2010 valid_lft
= stored_lft
;
2014 valid_lft
= MIN_VALID_LIFETIME
;
2015 if (valid_lft
< prefered_lft
)
2016 prefered_lft
= valid_lft
;
2022 ifp
->valid_lft
= valid_lft
;
2023 ifp
->prefered_lft
= prefered_lft
;
2026 ifp
->flags
&= ~IFA_F_DEPRECATED
;
2027 spin_unlock(&ifp
->lock
);
2029 if (!(flags
&IFA_F_TENTATIVE
))
2030 ipv6_ifa_notify(0, ifp
);
2032 spin_unlock(&ifp
->lock
);
2034 #ifdef CONFIG_IPV6_PRIVACY
2035 read_lock_bh(&in6_dev
->lock
);
2036 /* update all temporary addresses in the list */
2037 list_for_each_entry(ift
, &in6_dev
->tempaddr_list
,
2039 int age
, max_valid
, max_prefered
;
2041 if (ifp
!= ift
->ifpub
)
2045 * RFC 4941 section 3.3:
2046 * If a received option will extend the lifetime
2047 * of a public address, the lifetimes of
2048 * temporary addresses should be extended,
2049 * subject to the overall constraint that no
2050 * temporary addresses should ever remain
2051 * "valid" or "preferred" for a time longer than
2052 * (TEMP_VALID_LIFETIME) or
2053 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR),
2056 age
= (now
- ift
->cstamp
) / HZ
;
2057 max_valid
= in6_dev
->cnf
.temp_valid_lft
- age
;
2061 max_prefered
= in6_dev
->cnf
.temp_prefered_lft
-
2062 in6_dev
->cnf
.max_desync_factor
-
2064 if (max_prefered
< 0)
2067 if (valid_lft
> max_valid
)
2068 valid_lft
= max_valid
;
2070 if (prefered_lft
> max_prefered
)
2071 prefered_lft
= max_prefered
;
2073 spin_lock(&ift
->lock
);
2075 ift
->valid_lft
= valid_lft
;
2076 ift
->prefered_lft
= prefered_lft
;
2078 if (prefered_lft
> 0)
2079 ift
->flags
&= ~IFA_F_DEPRECATED
;
2081 spin_unlock(&ift
->lock
);
2082 if (!(flags
&IFA_F_TENTATIVE
))
2083 ipv6_ifa_notify(0, ift
);
2086 if ((create
|| list_empty(&in6_dev
->tempaddr_list
)) && in6_dev
->cnf
.use_tempaddr
> 0) {
2088 * When a new public address is created as
2089 * described in [ADDRCONF], also create a new
2090 * temporary address. Also create a temporary
2091 * address if it's enabled but no temporary
2092 * address currently exists.
2094 read_unlock_bh(&in6_dev
->lock
);
2095 ipv6_create_tempaddr(ifp
, NULL
);
2097 read_unlock_bh(&in6_dev
->lock
);
2104 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
2105 in6_dev_put(in6_dev
);
2109 * Set destination address.
2110 * Special case for SIT interfaces where we create a new "virtual"
2113 int addrconf_set_dstaddr(struct net
*net
, void __user
*arg
)
2115 struct in6_ifreq ireq
;
2116 struct net_device
*dev
;
2122 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2125 dev
= __dev_get_by_index(net
, ireq
.ifr6_ifindex
);
2131 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2132 if (dev
->type
== ARPHRD_SIT
) {
2133 const struct net_device_ops
*ops
= dev
->netdev_ops
;
2135 struct ip_tunnel_parm p
;
2137 err
= -EADDRNOTAVAIL
;
2138 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
2141 memset(&p
, 0, sizeof(p
));
2142 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
2146 p
.iph
.protocol
= IPPROTO_IPV6
;
2148 ifr
.ifr_ifru
.ifru_data
= (__force
void __user
*)&p
;
2150 if (ops
->ndo_do_ioctl
) {
2151 mm_segment_t oldfs
= get_fs();
2154 err
= ops
->ndo_do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
2161 dev
= __dev_get_by_name(net
, p
.name
);
2164 err
= dev_open(dev
);
2175 * Manual configuration of address on an interface
2177 static int inet6_addr_add(struct net
*net
, int ifindex
, const struct in6_addr
*pfx
,
2178 unsigned int plen
, __u8 ifa_flags
, __u32 prefered_lft
,
2181 struct inet6_ifaddr
*ifp
;
2182 struct inet6_dev
*idev
;
2183 struct net_device
*dev
;
2187 unsigned long timeout
;
2194 /* check the lifetime */
2195 if (!valid_lft
|| prefered_lft
> valid_lft
)
2198 dev
= __dev_get_by_index(net
, ifindex
);
2202 idev
= addrconf_add_dev(dev
);
2204 return PTR_ERR(idev
);
2206 scope
= ipv6_addr_scope(pfx
);
2208 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
2209 if (addrconf_finite_timeout(timeout
)) {
2210 expires
= jiffies_to_clock_t(timeout
* HZ
);
2211 valid_lft
= timeout
;
2212 flags
= RTF_EXPIRES
;
2216 ifa_flags
|= IFA_F_PERMANENT
;
2219 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
2220 if (addrconf_finite_timeout(timeout
)) {
2222 ifa_flags
|= IFA_F_DEPRECATED
;
2223 prefered_lft
= timeout
;
2226 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, ifa_flags
);
2229 spin_lock_bh(&ifp
->lock
);
2230 ifp
->valid_lft
= valid_lft
;
2231 ifp
->prefered_lft
= prefered_lft
;
2232 ifp
->tstamp
= jiffies
;
2233 spin_unlock_bh(&ifp
->lock
);
2235 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
2238 * Note that section 3.1 of RFC 4429 indicates
2239 * that the Optimistic flag should not be set for
2240 * manually configured addresses
2242 addrconf_dad_start(ifp
);
2248 return PTR_ERR(ifp
);
2251 static int inet6_addr_del(struct net
*net
, int ifindex
, const struct in6_addr
*pfx
,
2254 struct inet6_ifaddr
*ifp
;
2255 struct inet6_dev
*idev
;
2256 struct net_device
*dev
;
2261 dev
= __dev_get_by_index(net
, ifindex
);
2265 if ((idev
= __in6_dev_get(dev
)) == NULL
)
2268 read_lock_bh(&idev
->lock
);
2269 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
2270 if (ifp
->prefix_len
== plen
&&
2271 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
2273 read_unlock_bh(&idev
->lock
);
2277 /* If the last address is deleted administratively,
2278 disable IPv6 on this interface.
2280 if (list_empty(&idev
->addr_list
))
2281 addrconf_ifdown(idev
->dev
, 1);
2285 read_unlock_bh(&idev
->lock
);
2286 return -EADDRNOTAVAIL
;
2290 int addrconf_add_ifaddr(struct net
*net
, void __user
*arg
)
2292 struct in6_ifreq ireq
;
2295 if (!capable(CAP_NET_ADMIN
))
2298 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2302 err
= inet6_addr_add(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2303 ireq
.ifr6_prefixlen
, IFA_F_PERMANENT
,
2304 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2309 int addrconf_del_ifaddr(struct net
*net
, void __user
*arg
)
2311 struct in6_ifreq ireq
;
2314 if (!capable(CAP_NET_ADMIN
))
2317 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2321 err
= inet6_addr_del(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2322 ireq
.ifr6_prefixlen
);
2327 static void add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
2328 int plen
, int scope
)
2330 struct inet6_ifaddr
*ifp
;
2332 ifp
= ipv6_add_addr(idev
, addr
, plen
, scope
, IFA_F_PERMANENT
);
2334 spin_lock_bh(&ifp
->lock
);
2335 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2336 spin_unlock_bh(&ifp
->lock
);
2337 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2342 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2343 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
2345 struct in6_addr addr
;
2346 struct net_device
*dev
;
2347 struct net
*net
= dev_net(idev
->dev
);
2352 memset(&addr
, 0, sizeof(struct in6_addr
));
2353 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
2355 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
2356 addr
.s6_addr32
[0] = htonl(0xfe800000);
2359 scope
= IPV6_ADDR_COMPATv4
;
2362 if (addr
.s6_addr32
[3]) {
2363 add_addr(idev
, &addr
, 128, scope
);
2367 for_each_netdev(net
, dev
) {
2368 struct in_device
*in_dev
= __in_dev_get_rtnl(dev
);
2369 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
2370 struct in_ifaddr
*ifa
;
2374 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
2377 addr
.s6_addr32
[3] = ifa
->ifa_local
;
2379 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
2381 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
2382 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2386 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2391 add_addr(idev
, &addr
, plen
, flag
);
2398 static void init_loopback(struct net_device
*dev
)
2400 struct inet6_dev
*idev
;
2406 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2407 pr_debug("%s: add_dev failed\n", __func__
);
2411 add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
);
2414 static void addrconf_add_linklocal(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
2416 struct inet6_ifaddr
*ifp
;
2417 u32 addr_flags
= IFA_F_PERMANENT
;
2419 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2420 if (idev
->cnf
.optimistic_dad
&&
2421 !dev_net(idev
->dev
)->ipv6
.devconf_all
->forwarding
)
2422 addr_flags
|= IFA_F_OPTIMISTIC
;
2426 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, addr_flags
);
2428 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
2429 addrconf_dad_start(ifp
);
2434 static void addrconf_dev_config(struct net_device
*dev
)
2436 struct in6_addr addr
;
2437 struct inet6_dev
*idev
;
2441 if ((dev
->type
!= ARPHRD_ETHER
) &&
2442 (dev
->type
!= ARPHRD_FDDI
) &&
2443 (dev
->type
!= ARPHRD_ARCNET
) &&
2444 (dev
->type
!= ARPHRD_INFINIBAND
) &&
2445 (dev
->type
!= ARPHRD_IEEE802154
)) {
2446 /* Alas, we support only Ethernet autoconfiguration. */
2450 idev
= addrconf_add_dev(dev
);
2454 memset(&addr
, 0, sizeof(struct in6_addr
));
2455 addr
.s6_addr32
[0] = htonl(0xFE800000);
2457 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
2458 addrconf_add_linklocal(idev
, &addr
);
2461 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2462 static void addrconf_sit_config(struct net_device
*dev
)
2464 struct inet6_dev
*idev
;
2469 * Configure the tunnel with one of our IPv4
2470 * addresses... we should configure all of
2471 * our v4 addrs in the tunnel
2474 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2475 pr_debug("%s: add_dev failed\n", __func__
);
2479 if (dev
->priv_flags
& IFF_ISATAP
) {
2480 struct in6_addr addr
;
2482 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2483 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
2484 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
))
2485 addrconf_add_linklocal(idev
, &addr
);
2489 sit_add_v4_addrs(idev
);
2491 if (dev
->flags
&IFF_POINTOPOINT
) {
2492 addrconf_add_mroute(dev
);
2493 addrconf_add_lroute(dev
);
2499 #if defined(CONFIG_NET_IPGRE) || defined(CONFIG_NET_IPGRE_MODULE)
2500 static void addrconf_gre_config(struct net_device
*dev
)
2502 struct inet6_dev
*idev
;
2503 struct in6_addr addr
;
2505 pr_info("%s(%s)\n", __func__
, dev
->name
);
2509 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2510 pr_debug("%s: add_dev failed\n", __func__
);
2514 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2515 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
2517 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
))
2518 addrconf_add_linklocal(idev
, &addr
);
2523 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
2525 struct in6_addr lladdr
;
2527 if (!ipv6_get_lladdr(link_dev
, &lladdr
, IFA_F_TENTATIVE
)) {
2528 addrconf_add_linklocal(idev
, &lladdr
);
2534 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
2536 struct net_device
*link_dev
;
2537 struct net
*net
= dev_net(idev
->dev
);
2539 /* first try to inherit the link-local address from the link device */
2540 if (idev
->dev
->iflink
&&
2541 (link_dev
= __dev_get_by_index(net
, idev
->dev
->iflink
))) {
2542 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2545 /* then try to inherit it from any device */
2546 for_each_netdev(net
, link_dev
) {
2547 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2550 pr_debug("init ip6-ip6: add_linklocal failed\n");
2554 * Autoconfigure tunnel with a link-local address so routing protocols,
2555 * DHCPv6, MLD etc. can be run over the virtual link
2558 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
2560 struct inet6_dev
*idev
;
2564 idev
= addrconf_add_dev(dev
);
2566 pr_debug("init ip6-ip6: add_dev failed\n");
2569 ip6_tnl_add_linklocal(idev
);
2572 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
2575 struct net_device
*dev
= (struct net_device
*) data
;
2576 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2577 int run_pending
= 0;
2581 case NETDEV_REGISTER
:
2582 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2583 idev
= ipv6_add_dev(dev
);
2585 return notifier_from_errno(-ENOMEM
);
2591 if (dev
->flags
& IFF_SLAVE
)
2594 if (event
== NETDEV_UP
) {
2595 if (!addrconf_qdisc_ok(dev
)) {
2596 /* device is not ready yet. */
2597 pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n",
2602 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
)
2603 idev
= ipv6_add_dev(dev
);
2606 idev
->if_flags
|= IF_READY
;
2610 if (!addrconf_qdisc_ok(dev
)) {
2611 /* device is still not ready. */
2616 if (idev
->if_flags
& IF_READY
)
2617 /* device is already configured. */
2619 idev
->if_flags
|= IF_READY
;
2622 pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n",
2628 switch (dev
->type
) {
2629 #if defined(CONFIG_IPV6_SIT) || defined(CONFIG_IPV6_SIT_MODULE)
2631 addrconf_sit_config(dev
);
2634 #if defined(CONFIG_NET_IPGRE) || defined(CONFIG_NET_IPGRE_MODULE)
2636 addrconf_gre_config(dev
);
2639 case ARPHRD_TUNNEL6
:
2640 addrconf_ip6_tnl_config(dev
);
2642 case ARPHRD_LOOPBACK
:
2647 addrconf_dev_config(dev
);
2653 addrconf_dad_run(idev
);
2656 * If the MTU changed during the interface down,
2657 * when the interface up, the changed MTU must be
2658 * reflected in the idev as well as routers.
2660 if (idev
->cnf
.mtu6
!= dev
->mtu
&&
2661 dev
->mtu
>= IPV6_MIN_MTU
) {
2662 rt6_mtu_change(dev
, dev
->mtu
);
2663 idev
->cnf
.mtu6
= dev
->mtu
;
2665 idev
->tstamp
= jiffies
;
2666 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2669 * If the changed mtu during down is lower than
2670 * IPV6_MIN_MTU stop IPv6 on this interface.
2672 if (dev
->mtu
< IPV6_MIN_MTU
)
2673 addrconf_ifdown(dev
, 1);
2677 case NETDEV_CHANGEMTU
:
2678 if (idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2679 rt6_mtu_change(dev
, dev
->mtu
);
2680 idev
->cnf
.mtu6
= dev
->mtu
;
2684 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2685 idev
= ipv6_add_dev(dev
);
2691 * MTU falled under IPV6_MIN_MTU.
2692 * Stop IPv6 on this interface.
2696 case NETDEV_UNREGISTER
:
2698 * Remove all addresses from this interface.
2700 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2703 case NETDEV_CHANGENAME
:
2705 snmp6_unregister_dev(idev
);
2706 addrconf_sysctl_unregister(idev
);
2707 addrconf_sysctl_register(idev
);
2708 err
= snmp6_register_dev(idev
);
2710 return notifier_from_errno(err
);
2714 case NETDEV_PRE_TYPE_CHANGE
:
2715 case NETDEV_POST_TYPE_CHANGE
:
2716 addrconf_type_change(dev
, event
);
2724 * addrconf module should be notified of a device going up
2726 static struct notifier_block ipv6_dev_notf
= {
2727 .notifier_call
= addrconf_notify
,
2730 static void addrconf_type_change(struct net_device
*dev
, unsigned long event
)
2732 struct inet6_dev
*idev
;
2735 idev
= __in6_dev_get(dev
);
2737 if (event
== NETDEV_POST_TYPE_CHANGE
)
2738 ipv6_mc_remap(idev
);
2739 else if (event
== NETDEV_PRE_TYPE_CHANGE
)
2740 ipv6_mc_unmap(idev
);
2743 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2745 struct net
*net
= dev_net(dev
);
2746 struct inet6_dev
*idev
;
2747 struct inet6_ifaddr
*ifa
;
2752 rt6_ifdown(net
, dev
);
2753 neigh_ifdown(&nd_tbl
, dev
);
2755 idev
= __in6_dev_get(dev
);
2760 * Step 1: remove reference to ipv6 device from parent device.
2766 /* protected by rtnl_lock */
2767 RCU_INIT_POINTER(dev
->ip6_ptr
, NULL
);
2769 /* Step 1.5: remove snmp6 entry */
2770 snmp6_unregister_dev(idev
);
2774 /* Step 2: clear hash table */
2775 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
2776 struct hlist_head
*h
= &inet6_addr_lst
[i
];
2777 struct hlist_node
*n
;
2779 spin_lock_bh(&addrconf_hash_lock
);
2781 hlist_for_each_entry_rcu(ifa
, n
, h
, addr_lst
) {
2782 if (ifa
->idev
== idev
) {
2783 hlist_del_init_rcu(&ifa
->addr_lst
);
2784 addrconf_del_timer(ifa
);
2788 spin_unlock_bh(&addrconf_hash_lock
);
2791 write_lock_bh(&idev
->lock
);
2793 /* Step 2: clear flags for stateless addrconf */
2795 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
2797 #ifdef CONFIG_IPV6_PRIVACY
2798 if (how
&& del_timer(&idev
->regen_timer
))
2801 /* Step 3: clear tempaddr list */
2802 while (!list_empty(&idev
->tempaddr_list
)) {
2803 ifa
= list_first_entry(&idev
->tempaddr_list
,
2804 struct inet6_ifaddr
, tmp_list
);
2805 list_del(&ifa
->tmp_list
);
2806 write_unlock_bh(&idev
->lock
);
2807 spin_lock_bh(&ifa
->lock
);
2810 in6_ifa_put(ifa
->ifpub
);
2813 spin_unlock_bh(&ifa
->lock
);
2815 write_lock_bh(&idev
->lock
);
2819 while (!list_empty(&idev
->addr_list
)) {
2820 ifa
= list_first_entry(&idev
->addr_list
,
2821 struct inet6_ifaddr
, if_list
);
2822 addrconf_del_timer(ifa
);
2824 list_del(&ifa
->if_list
);
2826 write_unlock_bh(&idev
->lock
);
2828 spin_lock_bh(&ifa
->state_lock
);
2830 ifa
->state
= INET6_IFADDR_STATE_DEAD
;
2831 spin_unlock_bh(&ifa
->state_lock
);
2833 if (state
!= INET6_IFADDR_STATE_DEAD
) {
2834 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
2835 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifa
);
2839 write_lock_bh(&idev
->lock
);
2842 write_unlock_bh(&idev
->lock
);
2844 /* Step 5: Discard multicast list */
2846 ipv6_mc_destroy_dev(idev
);
2850 idev
->tstamp
= jiffies
;
2852 /* Last: Shot the device (if unregistered) */
2854 addrconf_sysctl_unregister(idev
);
2855 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
2856 neigh_ifdown(&nd_tbl
, dev
);
2862 static void addrconf_rs_timer(unsigned long data
)
2864 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2865 struct inet6_dev
*idev
= ifp
->idev
;
2867 read_lock(&idev
->lock
);
2868 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
))
2871 if (idev
->cnf
.forwarding
)
2874 /* Announcement received after solicitation was sent */
2875 if (idev
->if_flags
& IF_RA_RCVD
)
2878 spin_lock(&ifp
->lock
);
2879 if (ifp
->probes
++ < idev
->cnf
.rtr_solicits
) {
2880 /* The wait after the last probe can be shorter */
2881 addrconf_mod_timer(ifp
, AC_RS
,
2882 (ifp
->probes
== idev
->cnf
.rtr_solicits
) ?
2883 idev
->cnf
.rtr_solicit_delay
:
2884 idev
->cnf
.rtr_solicit_interval
);
2885 spin_unlock(&ifp
->lock
);
2887 ndisc_send_rs(idev
->dev
, &ifp
->addr
, &in6addr_linklocal_allrouters
);
2889 spin_unlock(&ifp
->lock
);
2891 * Note: we do not support deprecated "all on-link"
2892 * assumption any longer.
2894 pr_debug("%s: no IPv6 routers present\n", idev
->dev
->name
);
2898 read_unlock(&idev
->lock
);
2903 * Duplicate Address Detection
2905 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
2907 unsigned long rand_num
;
2908 struct inet6_dev
*idev
= ifp
->idev
;
2910 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
2913 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
2915 ifp
->probes
= idev
->cnf
.dad_transmits
;
2916 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
2919 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
)
2921 struct inet6_dev
*idev
= ifp
->idev
;
2922 struct net_device
*dev
= idev
->dev
;
2924 addrconf_join_solict(dev
, &ifp
->addr
);
2926 net_srandom(ifp
->addr
.s6_addr32
[3]);
2928 read_lock_bh(&idev
->lock
);
2929 spin_lock(&ifp
->lock
);
2930 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
)
2933 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
2934 idev
->cnf
.accept_dad
< 1 ||
2935 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
2936 ifp
->flags
& IFA_F_NODAD
) {
2937 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
2938 spin_unlock(&ifp
->lock
);
2939 read_unlock_bh(&idev
->lock
);
2941 addrconf_dad_completed(ifp
);
2945 if (!(idev
->if_flags
& IF_READY
)) {
2946 spin_unlock(&ifp
->lock
);
2947 read_unlock_bh(&idev
->lock
);
2949 * If the device is not ready:
2950 * - keep it tentative if it is a permanent address.
2951 * - otherwise, kill it.
2954 addrconf_dad_stop(ifp
, 0);
2959 * Optimistic nodes can start receiving
2962 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
2963 ip6_ins_rt(ifp
->rt
);
2965 addrconf_dad_kick(ifp
);
2967 spin_unlock(&ifp
->lock
);
2968 read_unlock_bh(&idev
->lock
);
2971 static void addrconf_dad_timer(unsigned long data
)
2973 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2974 struct inet6_dev
*idev
= ifp
->idev
;
2975 struct in6_addr mcaddr
;
2977 if (!ifp
->probes
&& addrconf_dad_end(ifp
))
2980 read_lock(&idev
->lock
);
2981 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
)) {
2982 read_unlock(&idev
->lock
);
2986 spin_lock(&ifp
->lock
);
2987 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
) {
2988 spin_unlock(&ifp
->lock
);
2989 read_unlock(&idev
->lock
);
2993 if (ifp
->probes
== 0) {
2995 * DAD was successful
2998 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
2999 spin_unlock(&ifp
->lock
);
3000 read_unlock(&idev
->lock
);
3002 addrconf_dad_completed(ifp
);
3008 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
3009 spin_unlock(&ifp
->lock
);
3010 read_unlock(&idev
->lock
);
3012 /* send a neighbour solicitation for our addr */
3013 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
3014 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &in6addr_any
);
3019 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
3021 struct net_device
*dev
= ifp
->idev
->dev
;
3024 * Configure the address for reception. Now it is valid.
3027 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
3029 /* If added prefix is link local and we are prepared to process
3030 router advertisements, start sending router solicitations.
3033 if (((ifp
->idev
->cnf
.accept_ra
== 1 && !ifp
->idev
->cnf
.forwarding
) ||
3034 ifp
->idev
->cnf
.accept_ra
== 2) &&
3035 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
3036 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
3037 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
3039 * If a host as already performed a random delay
3040 * [...] as part of DAD [...] there is no need
3041 * to delay again before sending the first RS
3043 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &in6addr_linklocal_allrouters
);
3045 spin_lock_bh(&ifp
->lock
);
3047 ifp
->idev
->if_flags
|= IF_RS_SENT
;
3048 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
3049 spin_unlock_bh(&ifp
->lock
);
3053 static void addrconf_dad_run(struct inet6_dev
*idev
)
3055 struct inet6_ifaddr
*ifp
;
3057 read_lock_bh(&idev
->lock
);
3058 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
3059 spin_lock(&ifp
->lock
);
3060 if (ifp
->flags
& IFA_F_TENTATIVE
&&
3061 ifp
->state
== INET6_IFADDR_STATE_DAD
)
3062 addrconf_dad_kick(ifp
);
3063 spin_unlock(&ifp
->lock
);
3065 read_unlock_bh(&idev
->lock
);
3068 #ifdef CONFIG_PROC_FS
3069 struct if6_iter_state
{
3070 struct seq_net_private p
;
3075 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
, loff_t pos
)
3077 struct inet6_ifaddr
*ifa
= NULL
;
3078 struct if6_iter_state
*state
= seq
->private;
3079 struct net
*net
= seq_file_net(seq
);
3082 /* initial bucket if pos is 0 */
3088 for (; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
3089 struct hlist_node
*n
;
3090 hlist_for_each_entry_rcu_bh(ifa
, n
, &inet6_addr_lst
[state
->bucket
],
3092 /* sync with offset */
3093 if (p
< state
->offset
) {
3098 if (net_eq(dev_net(ifa
->idev
->dev
), net
))
3102 /* prepare for next bucket */
3109 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
,
3110 struct inet6_ifaddr
*ifa
)
3112 struct if6_iter_state
*state
= seq
->private;
3113 struct net
*net
= seq_file_net(seq
);
3114 struct hlist_node
*n
= &ifa
->addr_lst
;
3116 hlist_for_each_entry_continue_rcu_bh(ifa
, n
, addr_lst
) {
3118 if (net_eq(dev_net(ifa
->idev
->dev
), net
))
3122 while (++state
->bucket
< IN6_ADDR_HSIZE
) {
3124 hlist_for_each_entry_rcu_bh(ifa
, n
,
3125 &inet6_addr_lst
[state
->bucket
], addr_lst
) {
3127 if (net_eq(dev_net(ifa
->idev
->dev
), net
))
3135 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
3139 return if6_get_first(seq
, *pos
);
3142 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
3144 struct inet6_ifaddr
*ifa
;
3146 ifa
= if6_get_next(seq
, v
);
3151 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
3154 rcu_read_unlock_bh();
3157 static int if6_seq_show(struct seq_file
*seq
, void *v
)
3159 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
3160 seq_printf(seq
, "%pi6 %02x %02x %02x %02x %8s\n",
3162 ifp
->idev
->dev
->ifindex
,
3166 ifp
->idev
->dev
->name
);
3170 static const struct seq_operations if6_seq_ops
= {
3171 .start
= if6_seq_start
,
3172 .next
= if6_seq_next
,
3173 .show
= if6_seq_show
,
3174 .stop
= if6_seq_stop
,
3177 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
3179 return seq_open_net(inode
, file
, &if6_seq_ops
,
3180 sizeof(struct if6_iter_state
));
3183 static const struct file_operations if6_fops
= {
3184 .owner
= THIS_MODULE
,
3185 .open
= if6_seq_open
,
3187 .llseek
= seq_lseek
,
3188 .release
= seq_release_net
,
3191 static int __net_init
if6_proc_net_init(struct net
*net
)
3193 if (!proc_net_fops_create(net
, "if_inet6", S_IRUGO
, &if6_fops
))
3198 static void __net_exit
if6_proc_net_exit(struct net
*net
)
3200 proc_net_remove(net
, "if_inet6");
3203 static struct pernet_operations if6_proc_net_ops
= {
3204 .init
= if6_proc_net_init
,
3205 .exit
= if6_proc_net_exit
,
3208 int __init
if6_proc_init(void)
3210 return register_pernet_subsys(&if6_proc_net_ops
);
3213 void if6_proc_exit(void)
3215 unregister_pernet_subsys(&if6_proc_net_ops
);
3217 #endif /* CONFIG_PROC_FS */
3219 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
3220 /* Check if address is a home address configured on any interface. */
3221 int ipv6_chk_home_addr(struct net
*net
, const struct in6_addr
*addr
)
3224 struct inet6_ifaddr
*ifp
= NULL
;
3225 struct hlist_node
*n
;
3226 unsigned int hash
= ipv6_addr_hash(addr
);
3229 hlist_for_each_entry_rcu_bh(ifp
, n
, &inet6_addr_lst
[hash
], addr_lst
) {
3230 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
3232 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
3233 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
3238 rcu_read_unlock_bh();
3244 * Periodic address status verification
3247 static void addrconf_verify(unsigned long foo
)
3249 unsigned long now
, next
, next_sec
, next_sched
;
3250 struct inet6_ifaddr
*ifp
;
3251 struct hlist_node
*node
;
3255 spin_lock(&addrconf_verify_lock
);
3257 next
= round_jiffies_up(now
+ ADDR_CHECK_FREQUENCY
);
3259 del_timer(&addr_chk_timer
);
3261 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
3263 hlist_for_each_entry_rcu_bh(ifp
, node
,
3264 &inet6_addr_lst
[i
], addr_lst
) {
3267 if (ifp
->flags
& IFA_F_PERMANENT
)
3270 spin_lock(&ifp
->lock
);
3271 /* We try to batch several events at once. */
3272 age
= (now
- ifp
->tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
3274 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
3275 age
>= ifp
->valid_lft
) {
3276 spin_unlock(&ifp
->lock
);
3280 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
3281 spin_unlock(&ifp
->lock
);
3283 } else if (age
>= ifp
->prefered_lft
) {
3284 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
3287 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
3289 ifp
->flags
|= IFA_F_DEPRECATED
;
3292 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
3293 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
3295 spin_unlock(&ifp
->lock
);
3300 ipv6_ifa_notify(0, ifp
);
3304 #ifdef CONFIG_IPV6_PRIVACY
3305 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
3306 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
3307 unsigned long regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
3308 ifp
->idev
->cnf
.dad_transmits
*
3309 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
3311 if (age
>= ifp
->prefered_lft
- regen_advance
) {
3312 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
3313 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3314 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3315 if (!ifp
->regen_count
&& ifpub
) {
3318 in6_ifa_hold(ifpub
);
3319 spin_unlock(&ifp
->lock
);
3321 spin_lock(&ifpub
->lock
);
3322 ifpub
->regen_count
= 0;
3323 spin_unlock(&ifpub
->lock
);
3324 ipv6_create_tempaddr(ifpub
, ifp
);
3329 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
3330 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
3331 spin_unlock(&ifp
->lock
);
3334 /* ifp->prefered_lft <= ifp->valid_lft */
3335 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3336 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3337 spin_unlock(&ifp
->lock
);
3342 next_sec
= round_jiffies_up(next
);
3345 /* If rounded timeout is accurate enough, accept it. */
3346 if (time_before(next_sec
, next
+ ADDRCONF_TIMER_FUZZ
))
3347 next_sched
= next_sec
;
3349 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
3350 if (time_before(next_sched
, jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
))
3351 next_sched
= jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
;
3353 ADBG((KERN_DEBUG
"now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
3354 now
, next
, next_sec
, next_sched
));
3356 addr_chk_timer
.expires
= next_sched
;
3357 add_timer(&addr_chk_timer
);
3358 spin_unlock(&addrconf_verify_lock
);
3359 rcu_read_unlock_bh();
3362 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
)
3364 struct in6_addr
*pfx
= NULL
;
3367 pfx
= nla_data(addr
);
3370 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
3373 pfx
= nla_data(local
);
3379 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
3380 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
3381 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
3382 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
3386 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3388 struct net
*net
= sock_net(skb
->sk
);
3389 struct ifaddrmsg
*ifm
;
3390 struct nlattr
*tb
[IFA_MAX
+1];
3391 struct in6_addr
*pfx
;
3394 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3398 ifm
= nlmsg_data(nlh
);
3399 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3403 return inet6_addr_del(net
, ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
3406 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u8 ifa_flags
,
3407 u32 prefered_lft
, u32 valid_lft
)
3411 unsigned long timeout
;
3413 if (!valid_lft
|| (prefered_lft
> valid_lft
))
3416 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
3417 if (addrconf_finite_timeout(timeout
)) {
3418 expires
= jiffies_to_clock_t(timeout
* HZ
);
3419 valid_lft
= timeout
;
3420 flags
= RTF_EXPIRES
;
3424 ifa_flags
|= IFA_F_PERMANENT
;
3427 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
3428 if (addrconf_finite_timeout(timeout
)) {
3430 ifa_flags
|= IFA_F_DEPRECATED
;
3431 prefered_lft
= timeout
;
3434 spin_lock_bh(&ifp
->lock
);
3435 ifp
->flags
= (ifp
->flags
& ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
| IFA_F_HOMEADDRESS
)) | ifa_flags
;
3436 ifp
->tstamp
= jiffies
;
3437 ifp
->valid_lft
= valid_lft
;
3438 ifp
->prefered_lft
= prefered_lft
;
3440 spin_unlock_bh(&ifp
->lock
);
3441 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
3442 ipv6_ifa_notify(0, ifp
);
3444 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
3452 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3454 struct net
*net
= sock_net(skb
->sk
);
3455 struct ifaddrmsg
*ifm
;
3456 struct nlattr
*tb
[IFA_MAX
+1];
3457 struct in6_addr
*pfx
;
3458 struct inet6_ifaddr
*ifa
;
3459 struct net_device
*dev
;
3460 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
3464 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3468 ifm
= nlmsg_data(nlh
);
3469 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3473 if (tb
[IFA_CACHEINFO
]) {
3474 struct ifa_cacheinfo
*ci
;
3476 ci
= nla_data(tb
[IFA_CACHEINFO
]);
3477 valid_lft
= ci
->ifa_valid
;
3478 preferred_lft
= ci
->ifa_prefered
;
3480 preferred_lft
= INFINITY_LIFE_TIME
;
3481 valid_lft
= INFINITY_LIFE_TIME
;
3484 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3488 /* We ignore other flags so far. */
3489 ifa_flags
= ifm
->ifa_flags
& (IFA_F_NODAD
| IFA_F_HOMEADDRESS
);
3491 ifa
= ipv6_get_ifaddr(net
, pfx
, dev
, 1);
3494 * It would be best to check for !NLM_F_CREATE here but
3495 * userspace alreay relies on not having to provide this.
3497 return inet6_addr_add(net
, ifm
->ifa_index
, pfx
,
3498 ifm
->ifa_prefixlen
, ifa_flags
,
3499 preferred_lft
, valid_lft
);
3502 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
3503 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
3506 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
3513 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u8 flags
,
3514 u8 scope
, int ifindex
)
3516 struct ifaddrmsg
*ifm
;
3518 ifm
= nlmsg_data(nlh
);
3519 ifm
->ifa_family
= AF_INET6
;
3520 ifm
->ifa_prefixlen
= prefixlen
;
3521 ifm
->ifa_flags
= flags
;
3522 ifm
->ifa_scope
= scope
;
3523 ifm
->ifa_index
= ifindex
;
3526 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
3527 unsigned long tstamp
, u32 preferred
, u32 valid
)
3529 struct ifa_cacheinfo ci
;
3531 ci
.cstamp
= cstamp_delta(cstamp
);
3532 ci
.tstamp
= cstamp_delta(tstamp
);
3533 ci
.ifa_prefered
= preferred
;
3534 ci
.ifa_valid
= valid
;
3536 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
3539 static inline int rt_scope(int ifa_scope
)
3541 if (ifa_scope
& IFA_HOST
)
3542 return RT_SCOPE_HOST
;
3543 else if (ifa_scope
& IFA_LINK
)
3544 return RT_SCOPE_LINK
;
3545 else if (ifa_scope
& IFA_SITE
)
3546 return RT_SCOPE_SITE
;
3548 return RT_SCOPE_UNIVERSE
;
3551 static inline int inet6_ifaddr_msgsize(void)
3553 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
3554 + nla_total_size(16) /* IFA_ADDRESS */
3555 + nla_total_size(sizeof(struct ifa_cacheinfo
));
3558 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
3559 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3561 struct nlmsghdr
*nlh
;
3562 u32 preferred
, valid
;
3564 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3568 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
3569 ifa
->idev
->dev
->ifindex
);
3571 if (!(ifa
->flags
&IFA_F_PERMANENT
)) {
3572 preferred
= ifa
->prefered_lft
;
3573 valid
= ifa
->valid_lft
;
3574 if (preferred
!= INFINITY_LIFE_TIME
) {
3575 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
3576 if (preferred
> tval
)
3580 if (valid
!= INFINITY_LIFE_TIME
) {
3588 preferred
= INFINITY_LIFE_TIME
;
3589 valid
= INFINITY_LIFE_TIME
;
3592 if (nla_put(skb
, IFA_ADDRESS
, 16, &ifa
->addr
) < 0 ||
3593 put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0) {
3594 nlmsg_cancel(skb
, nlh
);
3598 return nlmsg_end(skb
, nlh
);
3601 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
3602 u32 pid
, u32 seq
, int event
, u16 flags
)
3604 struct nlmsghdr
*nlh
;
3605 u8 scope
= RT_SCOPE_UNIVERSE
;
3606 int ifindex
= ifmca
->idev
->dev
->ifindex
;
3608 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
3609 scope
= RT_SCOPE_SITE
;
3611 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3615 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3616 if (nla_put(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
) < 0 ||
3617 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
3618 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3619 nlmsg_cancel(skb
, nlh
);
3623 return nlmsg_end(skb
, nlh
);
3626 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
3627 u32 pid
, u32 seq
, int event
, unsigned int flags
)
3629 struct nlmsghdr
*nlh
;
3630 u8 scope
= RT_SCOPE_UNIVERSE
;
3631 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
3633 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
3634 scope
= RT_SCOPE_SITE
;
3636 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3640 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3641 if (nla_put(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
) < 0 ||
3642 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
3643 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3644 nlmsg_cancel(skb
, nlh
);
3648 return nlmsg_end(skb
, nlh
);
3657 /* called with rcu_read_lock() */
3658 static int in6_dump_addrs(struct inet6_dev
*idev
, struct sk_buff
*skb
,
3659 struct netlink_callback
*cb
, enum addr_type_t type
,
3660 int s_ip_idx
, int *p_ip_idx
)
3662 struct ifmcaddr6
*ifmca
;
3663 struct ifacaddr6
*ifaca
;
3665 int ip_idx
= *p_ip_idx
;
3667 read_lock_bh(&idev
->lock
);
3669 case UNICAST_ADDR
: {
3670 struct inet6_ifaddr
*ifa
;
3672 /* unicast address incl. temp addr */
3673 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
3674 if (++ip_idx
< s_ip_idx
)
3676 err
= inet6_fill_ifaddr(skb
, ifa
,
3677 NETLINK_CB(cb
->skb
).pid
,
3686 case MULTICAST_ADDR
:
3687 /* multicast address */
3688 for (ifmca
= idev
->mc_list
; ifmca
;
3689 ifmca
= ifmca
->next
, ip_idx
++) {
3690 if (ip_idx
< s_ip_idx
)
3692 err
= inet6_fill_ifmcaddr(skb
, ifmca
,
3693 NETLINK_CB(cb
->skb
).pid
,
3702 /* anycast address */
3703 for (ifaca
= idev
->ac_list
; ifaca
;
3704 ifaca
= ifaca
->aca_next
, ip_idx
++) {
3705 if (ip_idx
< s_ip_idx
)
3707 err
= inet6_fill_ifacaddr(skb
, ifaca
,
3708 NETLINK_CB(cb
->skb
).pid
,
3719 read_unlock_bh(&idev
->lock
);
3724 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3725 enum addr_type_t type
)
3727 struct net
*net
= sock_net(skb
->sk
);
3730 int s_idx
, s_ip_idx
;
3731 struct net_device
*dev
;
3732 struct inet6_dev
*idev
;
3733 struct hlist_head
*head
;
3734 struct hlist_node
*node
;
3737 s_idx
= idx
= cb
->args
[1];
3738 s_ip_idx
= ip_idx
= cb
->args
[2];
3741 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
3743 head
= &net
->dev_index_head
[h
];
3744 hlist_for_each_entry_rcu(dev
, node
, head
, index_hlist
) {
3747 if (h
> s_h
|| idx
> s_idx
)
3750 idev
= __in6_dev_get(dev
);
3754 if (in6_dump_addrs(idev
, skb
, cb
, type
,
3755 s_ip_idx
, &ip_idx
) <= 0)
3765 cb
->args
[2] = ip_idx
;
3770 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3772 enum addr_type_t type
= UNICAST_ADDR
;
3774 return inet6_dump_addr(skb
, cb
, type
);
3777 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3779 enum addr_type_t type
= MULTICAST_ADDR
;
3781 return inet6_dump_addr(skb
, cb
, type
);
3785 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3787 enum addr_type_t type
= ANYCAST_ADDR
;
3789 return inet6_dump_addr(skb
, cb
, type
);
3792 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
*nlh
,
3795 struct net
*net
= sock_net(in_skb
->sk
);
3796 struct ifaddrmsg
*ifm
;
3797 struct nlattr
*tb
[IFA_MAX
+1];
3798 struct in6_addr
*addr
= NULL
;
3799 struct net_device
*dev
= NULL
;
3800 struct inet6_ifaddr
*ifa
;
3801 struct sk_buff
*skb
;
3804 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3808 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3814 ifm
= nlmsg_data(nlh
);
3816 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3818 ifa
= ipv6_get_ifaddr(net
, addr
, dev
, 1);
3820 err
= -EADDRNOTAVAIL
;
3824 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
);
3830 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).pid
,
3831 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
3833 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3834 WARN_ON(err
== -EMSGSIZE
);
3838 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).pid
);
3845 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
3847 struct sk_buff
*skb
;
3848 struct net
*net
= dev_net(ifa
->idev
->dev
);
3851 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
3855 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
3857 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3858 WARN_ON(err
== -EMSGSIZE
);
3862 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3866 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
3869 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
3870 __s32
*array
, int bytes
)
3872 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
3874 memset(array
, 0, bytes
);
3875 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
3876 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
3877 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
3878 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
3879 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
3880 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
3881 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
3882 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
3883 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] =
3884 jiffies_to_msecs(cnf
->rtr_solicit_interval
);
3885 array
[DEVCONF_RTR_SOLICIT_DELAY
] =
3886 jiffies_to_msecs(cnf
->rtr_solicit_delay
);
3887 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
3888 #ifdef CONFIG_IPV6_PRIVACY
3889 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
3890 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
3891 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
3892 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
3893 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
3895 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
3896 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
3897 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
3898 #ifdef CONFIG_IPV6_ROUTER_PREF
3899 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
3900 array
[DEVCONF_RTR_PROBE_INTERVAL
] =
3901 jiffies_to_msecs(cnf
->rtr_probe_interval
);
3902 #ifdef CONFIG_IPV6_ROUTE_INFO
3903 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
3906 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
3907 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
3908 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
3909 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
3911 #ifdef CONFIG_IPV6_MROUTE
3912 array
[DEVCONF_MC_FORWARDING
] = cnf
->mc_forwarding
;
3914 array
[DEVCONF_DISABLE_IPV6
] = cnf
->disable_ipv6
;
3915 array
[DEVCONF_ACCEPT_DAD
] = cnf
->accept_dad
;
3916 array
[DEVCONF_FORCE_TLLAO
] = cnf
->force_tllao
;
3919 static inline size_t inet6_ifla6_size(void)
3921 return nla_total_size(4) /* IFLA_INET6_FLAGS */
3922 + nla_total_size(sizeof(struct ifla_cacheinfo
))
3923 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
3924 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
3925 + nla_total_size(ICMP6_MIB_MAX
* 8); /* IFLA_INET6_ICMP6STATS */
3928 static inline size_t inet6_if_nlmsg_size(void)
3930 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
3931 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
3932 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
3933 + nla_total_size(4) /* IFLA_MTU */
3934 + nla_total_size(4) /* IFLA_LINK */
3935 + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
3938 static inline void __snmp6_fill_statsdev(u64
*stats
, atomic_long_t
*mib
,
3939 int items
, int bytes
)
3942 int pad
= bytes
- sizeof(u64
) * items
;
3945 /* Use put_unaligned() because stats may not be aligned for u64. */
3946 put_unaligned(items
, &stats
[0]);
3947 for (i
= 1; i
< items
; i
++)
3948 put_unaligned(atomic_long_read(&mib
[i
]), &stats
[i
]);
3950 memset(&stats
[items
], 0, pad
);
3953 static inline void __snmp6_fill_stats64(u64
*stats
, void __percpu
**mib
,
3954 int items
, int bytes
, size_t syncpoff
)
3957 int pad
= bytes
- sizeof(u64
) * items
;
3960 /* Use put_unaligned() because stats may not be aligned for u64. */
3961 put_unaligned(items
, &stats
[0]);
3962 for (i
= 1; i
< items
; i
++)
3963 put_unaligned(snmp_fold_field64(mib
, i
, syncpoff
), &stats
[i
]);
3965 memset(&stats
[items
], 0, pad
);
3968 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
3972 case IFLA_INET6_STATS
:
3973 __snmp6_fill_stats64(stats
, (void __percpu
**)idev
->stats
.ipv6
,
3974 IPSTATS_MIB_MAX
, bytes
, offsetof(struct ipstats_mib
, syncp
));
3976 case IFLA_INET6_ICMP6STATS
:
3977 __snmp6_fill_statsdev(stats
, idev
->stats
.icmpv6dev
->mibs
, ICMP6_MIB_MAX
, bytes
);
3982 static int inet6_fill_ifla6_attrs(struct sk_buff
*skb
, struct inet6_dev
*idev
)
3985 struct ifla_cacheinfo ci
;
3987 if (nla_put_u32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
))
3988 goto nla_put_failure
;
3989 ci
.max_reasm_len
= IPV6_MAXPLEN
;
3990 ci
.tstamp
= cstamp_delta(idev
->tstamp
);
3991 ci
.reachable_time
= jiffies_to_msecs(idev
->nd_parms
->reachable_time
);
3992 ci
.retrans_time
= jiffies_to_msecs(idev
->nd_parms
->retrans_time
);
3993 if (nla_put(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
))
3994 goto nla_put_failure
;
3995 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
3997 goto nla_put_failure
;
3998 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
4000 /* XXX - MC not implemented */
4002 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
4004 goto nla_put_failure
;
4005 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
4007 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
4009 goto nla_put_failure
;
4010 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
4018 static size_t inet6_get_link_af_size(const struct net_device
*dev
)
4020 if (!__in6_dev_get(dev
))
4023 return inet6_ifla6_size();
4026 static int inet6_fill_link_af(struct sk_buff
*skb
, const struct net_device
*dev
)
4028 struct inet6_dev
*idev
= __in6_dev_get(dev
);
4033 if (inet6_fill_ifla6_attrs(skb
, idev
) < 0)
4039 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
4040 u32 pid
, u32 seq
, int event
, unsigned int flags
)
4042 struct net_device
*dev
= idev
->dev
;
4043 struct ifinfomsg
*hdr
;
4044 struct nlmsghdr
*nlh
;
4047 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*hdr
), flags
);
4051 hdr
= nlmsg_data(nlh
);
4052 hdr
->ifi_family
= AF_INET6
;
4054 hdr
->ifi_type
= dev
->type
;
4055 hdr
->ifi_index
= dev
->ifindex
;
4056 hdr
->ifi_flags
= dev_get_flags(dev
);
4057 hdr
->ifi_change
= 0;
4059 if (nla_put_string(skb
, IFLA_IFNAME
, dev
->name
) ||
4061 nla_put(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
)) ||
4062 nla_put_u32(skb
, IFLA_MTU
, dev
->mtu
) ||
4063 (dev
->ifindex
!= dev
->iflink
&&
4064 nla_put_u32(skb
, IFLA_LINK
, dev
->iflink
)))
4065 goto nla_put_failure
;
4066 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
4067 if (protoinfo
== NULL
)
4068 goto nla_put_failure
;
4070 if (inet6_fill_ifla6_attrs(skb
, idev
) < 0)
4071 goto nla_put_failure
;
4073 nla_nest_end(skb
, protoinfo
);
4074 return nlmsg_end(skb
, nlh
);
4077 nlmsg_cancel(skb
, nlh
);
4081 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4083 struct net
*net
= sock_net(skb
->sk
);
4086 struct net_device
*dev
;
4087 struct inet6_dev
*idev
;
4088 struct hlist_head
*head
;
4089 struct hlist_node
*node
;
4092 s_idx
= cb
->args
[1];
4095 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
4097 head
= &net
->dev_index_head
[h
];
4098 hlist_for_each_entry_rcu(dev
, node
, head
, index_hlist
) {
4101 idev
= __in6_dev_get(dev
);
4104 if (inet6_fill_ifinfo(skb
, idev
,
4105 NETLINK_CB(cb
->skb
).pid
,
4107 RTM_NEWLINK
, NLM_F_MULTI
) <= 0)
4121 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
4123 struct sk_buff
*skb
;
4124 struct net
*net
= dev_net(idev
->dev
);
4127 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
4131 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
4133 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
4134 WARN_ON(err
== -EMSGSIZE
);
4138 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFINFO
, NULL
, GFP_ATOMIC
);
4142 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFINFO
, err
);
4145 static inline size_t inet6_prefix_nlmsg_size(void)
4147 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
4148 + nla_total_size(sizeof(struct in6_addr
))
4149 + nla_total_size(sizeof(struct prefix_cacheinfo
));
4152 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
4153 struct prefix_info
*pinfo
, u32 pid
, u32 seq
,
4154 int event
, unsigned int flags
)
4156 struct prefixmsg
*pmsg
;
4157 struct nlmsghdr
*nlh
;
4158 struct prefix_cacheinfo ci
;
4160 nlh
= nlmsg_put(skb
, pid
, seq
, event
, sizeof(*pmsg
), flags
);
4164 pmsg
= nlmsg_data(nlh
);
4165 pmsg
->prefix_family
= AF_INET6
;
4166 pmsg
->prefix_pad1
= 0;
4167 pmsg
->prefix_pad2
= 0;
4168 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
4169 pmsg
->prefix_len
= pinfo
->prefix_len
;
4170 pmsg
->prefix_type
= pinfo
->type
;
4171 pmsg
->prefix_pad3
= 0;
4172 pmsg
->prefix_flags
= 0;
4174 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
4175 if (pinfo
->autoconf
)
4176 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
4178 if (nla_put(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
))
4179 goto nla_put_failure
;
4180 ci
.preferred_time
= ntohl(pinfo
->prefered
);
4181 ci
.valid_time
= ntohl(pinfo
->valid
);
4182 if (nla_put(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
))
4183 goto nla_put_failure
;
4184 return nlmsg_end(skb
, nlh
);
4187 nlmsg_cancel(skb
, nlh
);
4191 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
4192 struct prefix_info
*pinfo
)
4194 struct sk_buff
*skb
;
4195 struct net
*net
= dev_net(idev
->dev
);
4198 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
4202 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
4204 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
4205 WARN_ON(err
== -EMSGSIZE
);
4209 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
4213 rtnl_set_sk_err(net
, RTNLGRP_IPV6_PREFIX
, err
);
4216 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
4218 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
4223 * If the address was optimistic
4224 * we inserted the route at the start of
4225 * our DAD process, so we don't need
4228 if (!(ifp
->rt
->rt6i_node
))
4229 ip6_ins_rt(ifp
->rt
);
4230 if (ifp
->idev
->cnf
.forwarding
)
4231 addrconf_join_anycast(ifp
);
4234 if (ifp
->idev
->cnf
.forwarding
)
4235 addrconf_leave_anycast(ifp
);
4236 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
4237 dst_hold(&ifp
->rt
->dst
);
4239 if (ip6_del_rt(ifp
->rt
))
4240 dst_free(&ifp
->rt
->dst
);
4245 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
4248 if (likely(ifp
->idev
->dead
== 0))
4249 __ipv6_ifa_notify(event
, ifp
);
4250 rcu_read_unlock_bh();
4253 #ifdef CONFIG_SYSCTL
4256 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
,
4257 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4259 int *valp
= ctl
->data
;
4266 * ctl->data points to idev->cnf.forwarding, we should
4267 * not modify it until we get the rtnl lock.
4272 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
4275 ret
= addrconf_fixup_forwarding(ctl
, valp
, val
);
4281 static void dev_disable_change(struct inet6_dev
*idev
)
4283 if (!idev
|| !idev
->dev
)
4286 if (idev
->cnf
.disable_ipv6
)
4287 addrconf_notify(NULL
, NETDEV_DOWN
, idev
->dev
);
4289 addrconf_notify(NULL
, NETDEV_UP
, idev
->dev
);
4292 static void addrconf_disable_change(struct net
*net
, __s32 newf
)
4294 struct net_device
*dev
;
4295 struct inet6_dev
*idev
;
4298 for_each_netdev_rcu(net
, dev
) {
4299 idev
= __in6_dev_get(dev
);
4301 int changed
= (!idev
->cnf
.disable_ipv6
) ^ (!newf
);
4302 idev
->cnf
.disable_ipv6
= newf
;
4304 dev_disable_change(idev
);
4310 static int addrconf_disable_ipv6(struct ctl_table
*table
, int *p
, int newf
)
4315 if (!rtnl_trylock())
4316 return restart_syscall();
4318 net
= (struct net
*)table
->extra2
;
4322 if (p
== &net
->ipv6
.devconf_dflt
->disable_ipv6
) {
4327 if (p
== &net
->ipv6
.devconf_all
->disable_ipv6
) {
4328 net
->ipv6
.devconf_dflt
->disable_ipv6
= newf
;
4329 addrconf_disable_change(net
, newf
);
4330 } else if ((!newf
) ^ (!old
))
4331 dev_disable_change((struct inet6_dev
*)table
->extra1
);
4338 int addrconf_sysctl_disable(ctl_table
*ctl
, int write
,
4339 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4341 int *valp
= ctl
->data
;
4348 * ctl->data points to idev->cnf.disable_ipv6, we should
4349 * not modify it until we get the rtnl lock.
4354 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
4357 ret
= addrconf_disable_ipv6(ctl
, valp
, val
);
4363 static struct addrconf_sysctl_table
4365 struct ctl_table_header
*sysctl_header
;
4366 ctl_table addrconf_vars
[DEVCONF_MAX
+1];
4367 } addrconf_sysctl __read_mostly
= {
4368 .sysctl_header
= NULL
,
4371 .procname
= "forwarding",
4372 .data
= &ipv6_devconf
.forwarding
,
4373 .maxlen
= sizeof(int),
4375 .proc_handler
= addrconf_sysctl_forward
,
4378 .procname
= "hop_limit",
4379 .data
= &ipv6_devconf
.hop_limit
,
4380 .maxlen
= sizeof(int),
4382 .proc_handler
= proc_dointvec
,
4386 .data
= &ipv6_devconf
.mtu6
,
4387 .maxlen
= sizeof(int),
4389 .proc_handler
= proc_dointvec
,
4392 .procname
= "accept_ra",
4393 .data
= &ipv6_devconf
.accept_ra
,
4394 .maxlen
= sizeof(int),
4396 .proc_handler
= proc_dointvec
,
4399 .procname
= "accept_redirects",
4400 .data
= &ipv6_devconf
.accept_redirects
,
4401 .maxlen
= sizeof(int),
4403 .proc_handler
= proc_dointvec
,
4406 .procname
= "autoconf",
4407 .data
= &ipv6_devconf
.autoconf
,
4408 .maxlen
= sizeof(int),
4410 .proc_handler
= proc_dointvec
,
4413 .procname
= "dad_transmits",
4414 .data
= &ipv6_devconf
.dad_transmits
,
4415 .maxlen
= sizeof(int),
4417 .proc_handler
= proc_dointvec
,
4420 .procname
= "router_solicitations",
4421 .data
= &ipv6_devconf
.rtr_solicits
,
4422 .maxlen
= sizeof(int),
4424 .proc_handler
= proc_dointvec
,
4427 .procname
= "router_solicitation_interval",
4428 .data
= &ipv6_devconf
.rtr_solicit_interval
,
4429 .maxlen
= sizeof(int),
4431 .proc_handler
= proc_dointvec_jiffies
,
4434 .procname
= "router_solicitation_delay",
4435 .data
= &ipv6_devconf
.rtr_solicit_delay
,
4436 .maxlen
= sizeof(int),
4438 .proc_handler
= proc_dointvec_jiffies
,
4441 .procname
= "force_mld_version",
4442 .data
= &ipv6_devconf
.force_mld_version
,
4443 .maxlen
= sizeof(int),
4445 .proc_handler
= proc_dointvec
,
4447 #ifdef CONFIG_IPV6_PRIVACY
4449 .procname
= "use_tempaddr",
4450 .data
= &ipv6_devconf
.use_tempaddr
,
4451 .maxlen
= sizeof(int),
4453 .proc_handler
= proc_dointvec
,
4456 .procname
= "temp_valid_lft",
4457 .data
= &ipv6_devconf
.temp_valid_lft
,
4458 .maxlen
= sizeof(int),
4460 .proc_handler
= proc_dointvec
,
4463 .procname
= "temp_prefered_lft",
4464 .data
= &ipv6_devconf
.temp_prefered_lft
,
4465 .maxlen
= sizeof(int),
4467 .proc_handler
= proc_dointvec
,
4470 .procname
= "regen_max_retry",
4471 .data
= &ipv6_devconf
.regen_max_retry
,
4472 .maxlen
= sizeof(int),
4474 .proc_handler
= proc_dointvec
,
4477 .procname
= "max_desync_factor",
4478 .data
= &ipv6_devconf
.max_desync_factor
,
4479 .maxlen
= sizeof(int),
4481 .proc_handler
= proc_dointvec
,
4485 .procname
= "max_addresses",
4486 .data
= &ipv6_devconf
.max_addresses
,
4487 .maxlen
= sizeof(int),
4489 .proc_handler
= proc_dointvec
,
4492 .procname
= "accept_ra_defrtr",
4493 .data
= &ipv6_devconf
.accept_ra_defrtr
,
4494 .maxlen
= sizeof(int),
4496 .proc_handler
= proc_dointvec
,
4499 .procname
= "accept_ra_pinfo",
4500 .data
= &ipv6_devconf
.accept_ra_pinfo
,
4501 .maxlen
= sizeof(int),
4503 .proc_handler
= proc_dointvec
,
4505 #ifdef CONFIG_IPV6_ROUTER_PREF
4507 .procname
= "accept_ra_rtr_pref",
4508 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
4509 .maxlen
= sizeof(int),
4511 .proc_handler
= proc_dointvec
,
4514 .procname
= "router_probe_interval",
4515 .data
= &ipv6_devconf
.rtr_probe_interval
,
4516 .maxlen
= sizeof(int),
4518 .proc_handler
= proc_dointvec_jiffies
,
4520 #ifdef CONFIG_IPV6_ROUTE_INFO
4522 .procname
= "accept_ra_rt_info_max_plen",
4523 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
4524 .maxlen
= sizeof(int),
4526 .proc_handler
= proc_dointvec
,
4531 .procname
= "proxy_ndp",
4532 .data
= &ipv6_devconf
.proxy_ndp
,
4533 .maxlen
= sizeof(int),
4535 .proc_handler
= proc_dointvec
,
4538 .procname
= "accept_source_route",
4539 .data
= &ipv6_devconf
.accept_source_route
,
4540 .maxlen
= sizeof(int),
4542 .proc_handler
= proc_dointvec
,
4544 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4546 .procname
= "optimistic_dad",
4547 .data
= &ipv6_devconf
.optimistic_dad
,
4548 .maxlen
= sizeof(int),
4550 .proc_handler
= proc_dointvec
,
4554 #ifdef CONFIG_IPV6_MROUTE
4556 .procname
= "mc_forwarding",
4557 .data
= &ipv6_devconf
.mc_forwarding
,
4558 .maxlen
= sizeof(int),
4560 .proc_handler
= proc_dointvec
,
4564 .procname
= "disable_ipv6",
4565 .data
= &ipv6_devconf
.disable_ipv6
,
4566 .maxlen
= sizeof(int),
4568 .proc_handler
= addrconf_sysctl_disable
,
4571 .procname
= "accept_dad",
4572 .data
= &ipv6_devconf
.accept_dad
,
4573 .maxlen
= sizeof(int),
4575 .proc_handler
= proc_dointvec
,
4578 .procname
= "force_tllao",
4579 .data
= &ipv6_devconf
.force_tllao
,
4580 .maxlen
= sizeof(int),
4582 .proc_handler
= proc_dointvec
4590 static int __addrconf_sysctl_register(struct net
*net
, char *dev_name
,
4591 struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
4594 struct addrconf_sysctl_table
*t
;
4595 char path
[sizeof("net/ipv6/conf/") + IFNAMSIZ
];
4597 t
= kmemdup(&addrconf_sysctl
, sizeof(*t
), GFP_KERNEL
);
4601 for (i
= 0; t
->addrconf_vars
[i
].data
; i
++) {
4602 t
->addrconf_vars
[i
].data
+= (char *)p
- (char *)&ipv6_devconf
;
4603 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
4604 t
->addrconf_vars
[i
].extra2
= net
;
4607 snprintf(path
, sizeof(path
), "net/ipv6/conf/%s", dev_name
);
4609 t
->sysctl_header
= register_net_sysctl(net
, path
, t
->addrconf_vars
);
4610 if (t
->sysctl_header
== NULL
)
4622 static void __addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
4624 struct addrconf_sysctl_table
*t
;
4626 if (p
->sysctl
== NULL
)
4631 unregister_net_sysctl_table(t
->sysctl_header
);
4635 static void addrconf_sysctl_register(struct inet6_dev
*idev
)
4637 neigh_sysctl_register(idev
->dev
, idev
->nd_parms
, "ipv6",
4638 &ndisc_ifinfo_sysctl_change
);
4639 __addrconf_sysctl_register(dev_net(idev
->dev
), idev
->dev
->name
,
4643 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
4645 __addrconf_sysctl_unregister(&idev
->cnf
);
4646 neigh_sysctl_unregister(idev
->nd_parms
);
4652 static int __net_init
addrconf_init_net(struct net
*net
)
4655 struct ipv6_devconf
*all
, *dflt
;
4658 all
= &ipv6_devconf
;
4659 dflt
= &ipv6_devconf_dflt
;
4661 if (!net_eq(net
, &init_net
)) {
4662 all
= kmemdup(all
, sizeof(ipv6_devconf
), GFP_KERNEL
);
4666 dflt
= kmemdup(dflt
, sizeof(ipv6_devconf_dflt
), GFP_KERNEL
);
4668 goto err_alloc_dflt
;
4670 /* these will be inherited by all namespaces */
4671 dflt
->autoconf
= ipv6_defaults
.autoconf
;
4672 dflt
->disable_ipv6
= ipv6_defaults
.disable_ipv6
;
4675 net
->ipv6
.devconf_all
= all
;
4676 net
->ipv6
.devconf_dflt
= dflt
;
4678 #ifdef CONFIG_SYSCTL
4679 err
= __addrconf_sysctl_register(net
, "all", NULL
, all
);
4683 err
= __addrconf_sysctl_register(net
, "default", NULL
, dflt
);
4689 #ifdef CONFIG_SYSCTL
4691 __addrconf_sysctl_unregister(all
);
4701 static void __net_exit
addrconf_exit_net(struct net
*net
)
4703 #ifdef CONFIG_SYSCTL
4704 __addrconf_sysctl_unregister(net
->ipv6
.devconf_dflt
);
4705 __addrconf_sysctl_unregister(net
->ipv6
.devconf_all
);
4707 if (!net_eq(net
, &init_net
)) {
4708 kfree(net
->ipv6
.devconf_dflt
);
4709 kfree(net
->ipv6
.devconf_all
);
4713 static struct pernet_operations addrconf_ops
= {
4714 .init
= addrconf_init_net
,
4715 .exit
= addrconf_exit_net
,
4722 int register_inet6addr_notifier(struct notifier_block
*nb
)
4724 return atomic_notifier_chain_register(&inet6addr_chain
, nb
);
4726 EXPORT_SYMBOL(register_inet6addr_notifier
);
4728 int unregister_inet6addr_notifier(struct notifier_block
*nb
)
4730 return atomic_notifier_chain_unregister(&inet6addr_chain
, nb
);
4732 EXPORT_SYMBOL(unregister_inet6addr_notifier
);
4734 static struct rtnl_af_ops inet6_ops
= {
4736 .fill_link_af
= inet6_fill_link_af
,
4737 .get_link_af_size
= inet6_get_link_af_size
,
4741 * Init / cleanup code
4744 int __init
addrconf_init(void)
4748 err
= ipv6_addr_label_init();
4750 pr_crit("%s: cannot initialize default policy table: %d\n",
4755 err
= register_pernet_subsys(&addrconf_ops
);
4759 /* The addrconf netdev notifier requires that loopback_dev
4760 * has it's ipv6 private information allocated and setup
4761 * before it can bring up and give link-local addresses
4762 * to other devices which are up.
4764 * Unfortunately, loopback_dev is not necessarily the first
4765 * entry in the global dev_base list of net devices. In fact,
4766 * it is likely to be the very last entry on that list.
4767 * So this causes the notifier registry below to try and
4768 * give link-local addresses to all devices besides loopback_dev
4769 * first, then loopback_dev, which cases all the non-loopback_dev
4770 * devices to fail to get a link-local address.
4772 * So, as a temporary fix, allocate the ipv6 structure for
4773 * loopback_dev first by hand.
4774 * Longer term, all of the dependencies ipv6 has upon the loopback
4775 * device and it being up should be removed.
4778 if (!ipv6_add_dev(init_net
.loopback_dev
))
4784 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
4785 INIT_HLIST_HEAD(&inet6_addr_lst
[i
]);
4787 register_netdevice_notifier(&ipv6_dev_notf
);
4791 err
= rtnl_af_register(&inet6_ops
);
4795 err
= __rtnl_register(PF_INET6
, RTM_GETLINK
, NULL
, inet6_dump_ifinfo
,
4800 /* Only the first call to __rtnl_register can fail */
4801 __rtnl_register(PF_INET6
, RTM_NEWADDR
, inet6_rtm_newaddr
, NULL
, NULL
);
4802 __rtnl_register(PF_INET6
, RTM_DELADDR
, inet6_rtm_deladdr
, NULL
, NULL
);
4803 __rtnl_register(PF_INET6
, RTM_GETADDR
, inet6_rtm_getaddr
,
4804 inet6_dump_ifaddr
, NULL
);
4805 __rtnl_register(PF_INET6
, RTM_GETMULTICAST
, NULL
,
4806 inet6_dump_ifmcaddr
, NULL
);
4807 __rtnl_register(PF_INET6
, RTM_GETANYCAST
, NULL
,
4808 inet6_dump_ifacaddr
, NULL
);
4810 ipv6_addr_label_rtnl_register();
4814 rtnl_af_unregister(&inet6_ops
);
4816 unregister_netdevice_notifier(&ipv6_dev_notf
);
4818 unregister_pernet_subsys(&addrconf_ops
);
4820 ipv6_addr_label_cleanup();
4825 void addrconf_cleanup(void)
4827 struct net_device
*dev
;
4830 unregister_netdevice_notifier(&ipv6_dev_notf
);
4831 unregister_pernet_subsys(&addrconf_ops
);
4832 ipv6_addr_label_cleanup();
4836 __rtnl_af_unregister(&inet6_ops
);
4838 /* clean dev list */
4839 for_each_netdev(&init_net
, dev
) {
4840 if (__in6_dev_get(dev
) == NULL
)
4842 addrconf_ifdown(dev
, 1);
4844 addrconf_ifdown(init_net
.loopback_dev
, 2);
4849 spin_lock_bh(&addrconf_hash_lock
);
4850 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
4851 WARN_ON(!hlist_empty(&inet6_addr_lst
[i
]));
4852 spin_unlock_bh(&addrconf_hash_lock
);
4854 del_timer(&addr_chk_timer
);