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>
66 #include <linux/hash.h>
68 #include <net/net_namespace.h>
72 #include <net/af_ieee802154.h>
73 #include <net/firewire.h>
75 #include <net/protocol.h>
76 #include <net/ndisc.h>
77 #include <net/ip6_route.h>
78 #include <net/addrconf.h>
81 #include <net/netlink.h>
82 #include <net/pkt_sched.h>
83 #include <linux/if_tunnel.h>
84 #include <linux/rtnetlink.h>
85 #include <linux/netconf.h>
87 #ifdef CONFIG_IPV6_PRIVACY
88 #include <linux/random.h>
91 #include <linux/uaccess.h>
92 #include <asm/unaligned.h>
94 #include <linux/proc_fs.h>
95 #include <linux/seq_file.h>
96 #include <linux/export.h>
98 /* Set to 3 to get tracing... */
102 #define ADBG(x) printk x
107 #define INFINITY_LIFE_TIME 0xFFFFFFFF
109 static inline u32
cstamp_delta(unsigned long cstamp
)
111 return (cstamp
- INITIAL_JIFFIES
) * 100UL / HZ
;
115 static void addrconf_sysctl_register(struct inet6_dev
*idev
);
116 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
);
118 static inline void addrconf_sysctl_register(struct inet6_dev
*idev
)
122 static inline void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
127 #ifdef CONFIG_IPV6_PRIVACY
128 static void __ipv6_regen_rndid(struct inet6_dev
*idev
);
129 static void __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
130 static void ipv6_regen_rndid(unsigned long data
);
133 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
);
134 static int ipv6_count_addresses(struct inet6_dev
*idev
);
137 * Configured unicast address hash table
139 static struct hlist_head inet6_addr_lst
[IN6_ADDR_HSIZE
];
140 static DEFINE_SPINLOCK(addrconf_hash_lock
);
142 static void addrconf_verify(unsigned long);
144 static DEFINE_TIMER(addr_chk_timer
, addrconf_verify
, 0, 0);
145 static DEFINE_SPINLOCK(addrconf_verify_lock
);
147 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
148 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
150 static void addrconf_type_change(struct net_device
*dev
,
151 unsigned long event
);
152 static int addrconf_ifdown(struct net_device
*dev
, int how
);
154 static struct rt6_info
*addrconf_get_prefix_route(const struct in6_addr
*pfx
,
156 const struct net_device
*dev
,
157 u32 flags
, u32 noflags
);
159 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
);
160 static void addrconf_dad_timer(unsigned long data
);
161 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
);
162 static void addrconf_dad_run(struct inet6_dev
*idev
);
163 static void addrconf_rs_timer(unsigned long data
);
164 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
165 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
167 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
168 struct prefix_info
*pinfo
);
169 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
170 struct net_device
*dev
);
172 static struct ipv6_devconf ipv6_devconf __read_mostly
= {
174 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
175 .mtu6
= IPV6_MIN_MTU
,
177 .accept_redirects
= 1,
179 .force_mld_version
= 0,
181 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
182 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
183 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
184 #ifdef CONFIG_IPV6_PRIVACY
186 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
187 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
188 .regen_max_retry
= REGEN_MAX_RETRY
,
189 .max_desync_factor
= MAX_DESYNC_FACTOR
,
191 .max_addresses
= IPV6_MAX_ADDRESSES
,
192 .accept_ra_defrtr
= 1,
193 .accept_ra_pinfo
= 1,
194 #ifdef CONFIG_IPV6_ROUTER_PREF
195 .accept_ra_rtr_pref
= 1,
196 .rtr_probe_interval
= 60 * HZ
,
197 #ifdef CONFIG_IPV6_ROUTE_INFO
198 .accept_ra_rt_info_max_plen
= 0,
202 .accept_source_route
= 0, /* we do not accept RH0 by default. */
207 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly
= {
209 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
210 .mtu6
= IPV6_MIN_MTU
,
212 .accept_redirects
= 1,
215 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
216 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
217 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
218 #ifdef CONFIG_IPV6_PRIVACY
220 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
221 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
222 .regen_max_retry
= REGEN_MAX_RETRY
,
223 .max_desync_factor
= MAX_DESYNC_FACTOR
,
225 .max_addresses
= IPV6_MAX_ADDRESSES
,
226 .accept_ra_defrtr
= 1,
227 .accept_ra_pinfo
= 1,
228 #ifdef CONFIG_IPV6_ROUTER_PREF
229 .accept_ra_rtr_pref
= 1,
230 .rtr_probe_interval
= 60 * HZ
,
231 #ifdef CONFIG_IPV6_ROUTE_INFO
232 .accept_ra_rt_info_max_plen
= 0,
236 .accept_source_route
= 0, /* we do not accept RH0 by default. */
241 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
242 const struct in6_addr in6addr_any
= IN6ADDR_ANY_INIT
;
243 const struct in6_addr in6addr_loopback
= IN6ADDR_LOOPBACK_INIT
;
244 const struct in6_addr in6addr_linklocal_allnodes
= IN6ADDR_LINKLOCAL_ALLNODES_INIT
;
245 const struct in6_addr in6addr_linklocal_allrouters
= IN6ADDR_LINKLOCAL_ALLROUTERS_INIT
;
246 const struct in6_addr in6addr_interfacelocal_allnodes
= IN6ADDR_INTERFACELOCAL_ALLNODES_INIT
;
247 const struct in6_addr in6addr_interfacelocal_allrouters
= IN6ADDR_INTERFACELOCAL_ALLROUTERS_INIT
;
248 const struct in6_addr in6addr_sitelocal_allrouters
= IN6ADDR_SITELOCAL_ALLROUTERS_INIT
;
250 /* Check if a valid qdisc is available */
251 static inline bool addrconf_qdisc_ok(const struct net_device
*dev
)
253 return !qdisc_tx_is_noop(dev
);
256 static void addrconf_del_timer(struct inet6_ifaddr
*ifp
)
258 if (del_timer(&ifp
->timer
))
262 enum addrconf_timer_t
{
268 static void addrconf_mod_timer(struct inet6_ifaddr
*ifp
,
269 enum addrconf_timer_t what
,
272 if (!del_timer(&ifp
->timer
))
277 ifp
->timer
.function
= addrconf_dad_timer
;
280 ifp
->timer
.function
= addrconf_rs_timer
;
285 ifp
->timer
.expires
= jiffies
+ when
;
286 add_timer(&ifp
->timer
);
289 static int snmp6_alloc_dev(struct inet6_dev
*idev
)
291 if (snmp_mib_init((void __percpu
**)idev
->stats
.ipv6
,
292 sizeof(struct ipstats_mib
),
293 __alignof__(struct ipstats_mib
)) < 0)
295 idev
->stats
.icmpv6dev
= kzalloc(sizeof(struct icmpv6_mib_device
),
297 if (!idev
->stats
.icmpv6dev
)
299 idev
->stats
.icmpv6msgdev
= kzalloc(sizeof(struct icmpv6msg_mib_device
),
301 if (!idev
->stats
.icmpv6msgdev
)
307 kfree(idev
->stats
.icmpv6dev
);
309 snmp_mib_free((void __percpu
**)idev
->stats
.ipv6
);
314 static void snmp6_free_dev(struct inet6_dev
*idev
)
316 kfree(idev
->stats
.icmpv6msgdev
);
317 kfree(idev
->stats
.icmpv6dev
);
318 snmp_mib_free((void __percpu
**)idev
->stats
.ipv6
);
321 /* Nobody refers to this device, we may destroy it. */
323 void in6_dev_finish_destroy(struct inet6_dev
*idev
)
325 struct net_device
*dev
= idev
->dev
;
327 WARN_ON(!list_empty(&idev
->addr_list
));
328 WARN_ON(idev
->mc_list
!= NULL
);
330 #ifdef NET_REFCNT_DEBUG
331 pr_debug("%s: %s\n", __func__
, dev
? dev
->name
: "NIL");
335 pr_warn("Freeing alive inet6 device %p\n", idev
);
338 snmp6_free_dev(idev
);
339 kfree_rcu(idev
, rcu
);
341 EXPORT_SYMBOL(in6_dev_finish_destroy
);
343 static struct inet6_dev
*ipv6_add_dev(struct net_device
*dev
)
345 struct inet6_dev
*ndev
;
349 if (dev
->mtu
< IPV6_MIN_MTU
)
352 ndev
= kzalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
357 rwlock_init(&ndev
->lock
);
359 INIT_LIST_HEAD(&ndev
->addr_list
);
361 memcpy(&ndev
->cnf
, dev_net(dev
)->ipv6
.devconf_dflt
, sizeof(ndev
->cnf
));
362 ndev
->cnf
.mtu6
= dev
->mtu
;
363 ndev
->cnf
.sysctl
= NULL
;
364 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
365 if (ndev
->nd_parms
== NULL
) {
369 if (ndev
->cnf
.forwarding
)
370 dev_disable_lro(dev
);
371 /* We refer to the device */
374 if (snmp6_alloc_dev(ndev
) < 0) {
376 "%s: cannot allocate memory for statistics; dev=%s.\n",
377 __func__
, dev
->name
));
378 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
384 if (snmp6_register_dev(ndev
) < 0) {
386 "%s: cannot create /proc/net/dev_snmp6/%s\n",
387 __func__
, dev
->name
));
388 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
390 in6_dev_finish_destroy(ndev
);
394 /* One reference from device. We must do this before
395 * we invoke __ipv6_regen_rndid().
399 if (dev
->flags
& (IFF_NOARP
| IFF_LOOPBACK
))
400 ndev
->cnf
.accept_dad
= -1;
402 #if IS_ENABLED(CONFIG_IPV6_SIT)
403 if (dev
->type
== ARPHRD_SIT
&& (dev
->priv_flags
& IFF_ISATAP
)) {
404 pr_info("%s: Disabled Multicast RS\n", dev
->name
);
405 ndev
->cnf
.rtr_solicits
= 0;
409 #ifdef CONFIG_IPV6_PRIVACY
410 INIT_LIST_HEAD(&ndev
->tempaddr_list
);
411 setup_timer(&ndev
->regen_timer
, ipv6_regen_rndid
, (unsigned long)ndev
);
412 if ((dev
->flags
&IFF_LOOPBACK
) ||
413 dev
->type
== ARPHRD_TUNNEL
||
414 dev
->type
== ARPHRD_TUNNEL6
||
415 dev
->type
== ARPHRD_SIT
||
416 dev
->type
== ARPHRD_NONE
) {
417 ndev
->cnf
.use_tempaddr
= -1;
420 ipv6_regen_rndid((unsigned long) ndev
);
423 ndev
->token
= in6addr_any
;
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 interface-local all-node multicast group */
435 ipv6_dev_mc_inc(dev
, &in6addr_interfacelocal_allnodes
);
437 /* Join all-node multicast group */
438 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allnodes
);
440 /* Join all-router multicast group if forwarding is set */
441 if (ndev
->cnf
.forwarding
&& (dev
->flags
& IFF_MULTICAST
))
442 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
447 static struct inet6_dev
*ipv6_find_idev(struct net_device
*dev
)
449 struct inet6_dev
*idev
;
453 idev
= __in6_dev_get(dev
);
455 idev
= ipv6_add_dev(dev
);
460 if (dev
->flags
&IFF_UP
)
465 static int inet6_netconf_msgsize_devconf(int type
)
467 int size
= NLMSG_ALIGN(sizeof(struct netconfmsg
))
468 + nla_total_size(4); /* NETCONFA_IFINDEX */
470 /* type -1 is used for ALL */
471 if (type
== -1 || type
== NETCONFA_FORWARDING
)
472 size
+= nla_total_size(4);
473 #ifdef CONFIG_IPV6_MROUTE
474 if (type
== -1 || type
== NETCONFA_MC_FORWARDING
)
475 size
+= nla_total_size(4);
481 static int inet6_netconf_fill_devconf(struct sk_buff
*skb
, int ifindex
,
482 struct ipv6_devconf
*devconf
, u32 portid
,
483 u32 seq
, int event
, unsigned int flags
,
486 struct nlmsghdr
*nlh
;
487 struct netconfmsg
*ncm
;
489 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct netconfmsg
),
494 ncm
= nlmsg_data(nlh
);
495 ncm
->ncm_family
= AF_INET6
;
497 if (nla_put_s32(skb
, NETCONFA_IFINDEX
, ifindex
) < 0)
498 goto nla_put_failure
;
500 /* type -1 is used for ALL */
501 if ((type
== -1 || type
== NETCONFA_FORWARDING
) &&
502 nla_put_s32(skb
, NETCONFA_FORWARDING
, devconf
->forwarding
) < 0)
503 goto nla_put_failure
;
504 #ifdef CONFIG_IPV6_MROUTE
505 if ((type
== -1 || type
== NETCONFA_MC_FORWARDING
) &&
506 nla_put_s32(skb
, NETCONFA_MC_FORWARDING
,
507 devconf
->mc_forwarding
) < 0)
508 goto nla_put_failure
;
510 return nlmsg_end(skb
, nlh
);
513 nlmsg_cancel(skb
, nlh
);
517 void inet6_netconf_notify_devconf(struct net
*net
, int type
, int ifindex
,
518 struct ipv6_devconf
*devconf
)
523 skb
= nlmsg_new(inet6_netconf_msgsize_devconf(type
), GFP_ATOMIC
);
527 err
= inet6_netconf_fill_devconf(skb
, ifindex
, devconf
, 0, 0,
528 RTM_NEWNETCONF
, 0, type
);
530 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
531 WARN_ON(err
== -EMSGSIZE
);
535 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_NETCONF
, NULL
, GFP_ATOMIC
);
538 rtnl_set_sk_err(net
, RTNLGRP_IPV6_NETCONF
, err
);
541 static const struct nla_policy devconf_ipv6_policy
[NETCONFA_MAX
+1] = {
542 [NETCONFA_IFINDEX
] = { .len
= sizeof(int) },
543 [NETCONFA_FORWARDING
] = { .len
= sizeof(int) },
546 static int inet6_netconf_get_devconf(struct sk_buff
*in_skb
,
547 struct nlmsghdr
*nlh
)
549 struct net
*net
= sock_net(in_skb
->sk
);
550 struct nlattr
*tb
[NETCONFA_MAX
+1];
551 struct netconfmsg
*ncm
;
553 struct ipv6_devconf
*devconf
;
554 struct inet6_dev
*in6_dev
;
555 struct net_device
*dev
;
559 err
= nlmsg_parse(nlh
, sizeof(*ncm
), tb
, NETCONFA_MAX
,
560 devconf_ipv6_policy
);
565 if (!tb
[NETCONFA_IFINDEX
])
568 ifindex
= nla_get_s32(tb
[NETCONFA_IFINDEX
]);
570 case NETCONFA_IFINDEX_ALL
:
571 devconf
= net
->ipv6
.devconf_all
;
573 case NETCONFA_IFINDEX_DEFAULT
:
574 devconf
= net
->ipv6
.devconf_dflt
;
577 dev
= __dev_get_by_index(net
, ifindex
);
580 in6_dev
= __in6_dev_get(dev
);
583 devconf
= &in6_dev
->cnf
;
588 skb
= nlmsg_new(inet6_netconf_msgsize_devconf(-1), GFP_ATOMIC
);
592 err
= inet6_netconf_fill_devconf(skb
, ifindex
, devconf
,
593 NETLINK_CB(in_skb
).portid
,
594 nlh
->nlmsg_seq
, RTM_NEWNETCONF
, 0,
597 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
598 WARN_ON(err
== -EMSGSIZE
);
602 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).portid
);
607 static int inet6_netconf_dump_devconf(struct sk_buff
*skb
,
608 struct netlink_callback
*cb
)
610 struct net
*net
= sock_net(skb
->sk
);
613 struct net_device
*dev
;
614 struct inet6_dev
*idev
;
615 struct hlist_head
*head
;
618 s_idx
= idx
= cb
->args
[1];
620 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
622 head
= &net
->dev_index_head
[h
];
624 cb
->seq
= atomic_read(&net
->ipv6
.dev_addr_genid
) ^
626 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
629 idev
= __in6_dev_get(dev
);
633 if (inet6_netconf_fill_devconf(skb
, dev
->ifindex
,
635 NETLINK_CB(cb
->skb
).portid
,
643 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
649 if (h
== NETDEV_HASHENTRIES
) {
650 if (inet6_netconf_fill_devconf(skb
, NETCONFA_IFINDEX_ALL
,
651 net
->ipv6
.devconf_all
,
652 NETLINK_CB(cb
->skb
).portid
,
654 RTM_NEWNETCONF
, NLM_F_MULTI
,
660 if (h
== NETDEV_HASHENTRIES
+ 1) {
661 if (inet6_netconf_fill_devconf(skb
, NETCONFA_IFINDEX_DEFAULT
,
662 net
->ipv6
.devconf_dflt
,
663 NETLINK_CB(cb
->skb
).portid
,
665 RTM_NEWNETCONF
, NLM_F_MULTI
,
679 static void dev_forward_change(struct inet6_dev
*idev
)
681 struct net_device
*dev
;
682 struct inet6_ifaddr
*ifa
;
687 if (idev
->cnf
.forwarding
)
688 dev_disable_lro(dev
);
689 if (dev
->flags
& IFF_MULTICAST
) {
690 if (idev
->cnf
.forwarding
) {
691 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
692 ipv6_dev_mc_inc(dev
, &in6addr_interfacelocal_allrouters
);
693 ipv6_dev_mc_inc(dev
, &in6addr_sitelocal_allrouters
);
695 ipv6_dev_mc_dec(dev
, &in6addr_linklocal_allrouters
);
696 ipv6_dev_mc_dec(dev
, &in6addr_interfacelocal_allrouters
);
697 ipv6_dev_mc_dec(dev
, &in6addr_sitelocal_allrouters
);
701 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
702 if (ifa
->flags
&IFA_F_TENTATIVE
)
704 if (idev
->cnf
.forwarding
)
705 addrconf_join_anycast(ifa
);
707 addrconf_leave_anycast(ifa
);
709 inet6_netconf_notify_devconf(dev_net(dev
), NETCONFA_FORWARDING
,
710 dev
->ifindex
, &idev
->cnf
);
714 static void addrconf_forward_change(struct net
*net
, __s32 newf
)
716 struct net_device
*dev
;
717 struct inet6_dev
*idev
;
719 for_each_netdev(net
, dev
) {
720 idev
= __in6_dev_get(dev
);
722 int changed
= (!idev
->cnf
.forwarding
) ^ (!newf
);
723 idev
->cnf
.forwarding
= newf
;
725 dev_forward_change(idev
);
730 static int addrconf_fixup_forwarding(struct ctl_table
*table
, int *p
, int newf
)
736 return restart_syscall();
738 net
= (struct net
*)table
->extra2
;
742 if (p
== &net
->ipv6
.devconf_dflt
->forwarding
) {
743 if ((!newf
) ^ (!old
))
744 inet6_netconf_notify_devconf(net
, NETCONFA_FORWARDING
,
745 NETCONFA_IFINDEX_DEFAULT
,
746 net
->ipv6
.devconf_dflt
);
751 if (p
== &net
->ipv6
.devconf_all
->forwarding
) {
752 net
->ipv6
.devconf_dflt
->forwarding
= newf
;
753 addrconf_forward_change(net
, newf
);
754 if ((!newf
) ^ (!old
))
755 inet6_netconf_notify_devconf(net
, NETCONFA_FORWARDING
,
756 NETCONFA_IFINDEX_ALL
,
757 net
->ipv6
.devconf_all
);
758 } else if ((!newf
) ^ (!old
))
759 dev_forward_change((struct inet6_dev
*)table
->extra1
);
763 rt6_purge_dflt_routers(net
);
768 /* Nobody refers to this ifaddr, destroy it */
769 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
771 WARN_ON(!hlist_unhashed(&ifp
->addr_lst
));
773 #ifdef NET_REFCNT_DEBUG
774 pr_debug("%s\n", __func__
);
777 in6_dev_put(ifp
->idev
);
779 if (del_timer(&ifp
->timer
))
780 pr_notice("Timer is still running, when freeing ifa=%p\n", ifp
);
782 if (ifp
->state
!= INET6_IFADDR_STATE_DEAD
) {
783 pr_warn("Freeing alive inet6 address %p\n", ifp
);
792 ipv6_link_dev_addr(struct inet6_dev
*idev
, struct inet6_ifaddr
*ifp
)
795 int ifp_scope
= ipv6_addr_src_scope(&ifp
->addr
);
798 * Each device address list is sorted in order of scope -
799 * global before linklocal.
801 list_for_each(p
, &idev
->addr_list
) {
802 struct inet6_ifaddr
*ifa
803 = list_entry(p
, struct inet6_ifaddr
, if_list
);
804 if (ifp_scope
>= ipv6_addr_src_scope(&ifa
->addr
))
808 list_add_tail(&ifp
->if_list
, p
);
811 static u32
inet6_addr_hash(const struct in6_addr
*addr
)
813 return hash_32(ipv6_addr_hash(addr
), IN6_ADDR_HSIZE_SHIFT
);
816 /* On success it returns ifp with increased reference count */
818 static struct inet6_ifaddr
*
819 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
, int pfxlen
,
820 int scope
, u32 flags
)
822 struct inet6_ifaddr
*ifa
= NULL
;
826 int addr_type
= ipv6_addr_type(addr
);
828 if (addr_type
== IPV6_ADDR_ANY
||
829 addr_type
& IPV6_ADDR_MULTICAST
||
830 (!(idev
->dev
->flags
& IFF_LOOPBACK
) &&
831 addr_type
& IPV6_ADDR_LOOPBACK
))
832 return ERR_PTR(-EADDRNOTAVAIL
);
836 err
= -ENODEV
; /*XXX*/
840 if (idev
->cnf
.disable_ipv6
) {
845 spin_lock(&addrconf_hash_lock
);
847 /* Ignore adding duplicate addresses on an interface */
848 if (ipv6_chk_same_addr(dev_net(idev
->dev
), addr
, idev
->dev
)) {
849 ADBG(("ipv6_add_addr: already assigned\n"));
854 ifa
= kzalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
857 ADBG(("ipv6_add_addr: malloc failed\n"));
862 rt
= addrconf_dst_alloc(idev
, addr
, false);
870 spin_lock_init(&ifa
->lock
);
871 spin_lock_init(&ifa
->state_lock
);
872 init_timer(&ifa
->timer
);
873 INIT_HLIST_NODE(&ifa
->addr_lst
);
874 ifa
->timer
.data
= (unsigned long) ifa
;
876 ifa
->prefix_len
= pfxlen
;
877 ifa
->flags
= flags
| IFA_F_TENTATIVE
;
878 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
879 ifa
->tokenized
= false;
888 /* Add to big hash table */
889 hash
= inet6_addr_hash(addr
);
891 hlist_add_head_rcu(&ifa
->addr_lst
, &inet6_addr_lst
[hash
]);
892 spin_unlock(&addrconf_hash_lock
);
894 write_lock(&idev
->lock
);
895 /* Add to inet6_dev unicast addr list. */
896 ipv6_link_dev_addr(idev
, ifa
);
898 #ifdef CONFIG_IPV6_PRIVACY
899 if (ifa
->flags
&IFA_F_TEMPORARY
) {
900 list_add(&ifa
->tmp_list
, &idev
->tempaddr_list
);
906 write_unlock(&idev
->lock
);
908 rcu_read_unlock_bh();
910 if (likely(err
== 0))
911 inet6addr_notifier_call_chain(NETDEV_UP
, ifa
);
919 spin_unlock(&addrconf_hash_lock
);
923 /* This function wants to get referenced ifp and releases it before return */
925 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
927 struct inet6_ifaddr
*ifa
, *ifn
;
928 struct inet6_dev
*idev
= ifp
->idev
;
930 int deleted
= 0, onlink
= 0;
931 unsigned long expires
= jiffies
;
933 spin_lock_bh(&ifp
->state_lock
);
935 ifp
->state
= INET6_IFADDR_STATE_DEAD
;
936 spin_unlock_bh(&ifp
->state_lock
);
938 if (state
== INET6_IFADDR_STATE_DEAD
)
941 spin_lock_bh(&addrconf_hash_lock
);
942 hlist_del_init_rcu(&ifp
->addr_lst
);
943 spin_unlock_bh(&addrconf_hash_lock
);
945 write_lock_bh(&idev
->lock
);
946 #ifdef CONFIG_IPV6_PRIVACY
947 if (ifp
->flags
&IFA_F_TEMPORARY
) {
948 list_del(&ifp
->tmp_list
);
950 in6_ifa_put(ifp
->ifpub
);
957 list_for_each_entry_safe(ifa
, ifn
, &idev
->addr_list
, if_list
) {
959 list_del_init(&ifp
->if_list
);
962 if (!(ifp
->flags
& IFA_F_PERMANENT
) || onlink
> 0)
966 } else if (ifp
->flags
& IFA_F_PERMANENT
) {
967 if (ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
969 if (ifa
->flags
& IFA_F_PERMANENT
) {
974 unsigned long lifetime
;
979 spin_lock(&ifa
->lock
);
981 lifetime
= addrconf_timeout_fixup(ifa
->valid_lft
, HZ
);
983 * Note: Because this address is
984 * not permanent, lifetime <
985 * LONG_MAX / HZ here.
987 if (time_before(expires
,
988 ifa
->tstamp
+ lifetime
* HZ
))
989 expires
= ifa
->tstamp
+ lifetime
* HZ
;
990 spin_unlock(&ifa
->lock
);
995 write_unlock_bh(&idev
->lock
);
997 addrconf_del_timer(ifp
);
999 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
1001 inet6addr_notifier_call_chain(NETDEV_DOWN
, ifp
);
1004 * Purge or update corresponding prefix
1006 * 1) we don't purge prefix here if address was not permanent.
1007 * prefix is managed by its own lifetime.
1008 * 2) if there're no addresses, delete prefix.
1009 * 3) if there're still other permanent address(es),
1010 * corresponding prefix is still permanent.
1011 * 4) otherwise, update prefix lifetime to the
1012 * longest valid lifetime among the corresponding
1013 * addresses on the device.
1014 * Note: subsequent RA will update lifetime.
1018 if ((ifp
->flags
& IFA_F_PERMANENT
) && onlink
< 1) {
1019 struct in6_addr prefix
;
1020 struct rt6_info
*rt
;
1022 ipv6_addr_prefix(&prefix
, &ifp
->addr
, ifp
->prefix_len
);
1024 rt
= addrconf_get_prefix_route(&prefix
,
1027 0, RTF_GATEWAY
| RTF_DEFAULT
);
1033 } else if (!(rt
->rt6i_flags
& RTF_EXPIRES
)) {
1034 rt6_set_expires(rt
, expires
);
1040 /* clean up prefsrc entries */
1041 rt6_remove_prefsrc(ifp
);
1046 #ifdef CONFIG_IPV6_PRIVACY
1047 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
1049 struct inet6_dev
*idev
= ifp
->idev
;
1050 struct in6_addr addr
, *tmpaddr
;
1051 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_tstamp
, age
;
1052 unsigned long regen_advance
;
1057 unsigned long now
= jiffies
;
1059 write_lock(&idev
->lock
);
1061 spin_lock_bh(&ift
->lock
);
1062 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
1063 spin_unlock_bh(&ift
->lock
);
1070 if (idev
->cnf
.use_tempaddr
<= 0) {
1071 write_unlock(&idev
->lock
);
1072 pr_info("%s: use_tempaddr is disabled\n", __func__
);
1077 spin_lock_bh(&ifp
->lock
);
1078 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
1079 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
1080 spin_unlock_bh(&ifp
->lock
);
1081 write_unlock(&idev
->lock
);
1082 pr_warn("%s: regeneration time exceeded - disabled temporary address support\n",
1089 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
1090 __ipv6_try_regen_rndid(idev
, tmpaddr
);
1091 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
1092 age
= (now
- ifp
->tstamp
) / HZ
;
1093 tmp_valid_lft
= min_t(__u32
,
1095 idev
->cnf
.temp_valid_lft
+ age
);
1096 tmp_prefered_lft
= min_t(__u32
,
1098 idev
->cnf
.temp_prefered_lft
+ age
-
1099 idev
->cnf
.max_desync_factor
);
1100 tmp_plen
= ifp
->prefix_len
;
1101 max_addresses
= idev
->cnf
.max_addresses
;
1102 tmp_tstamp
= ifp
->tstamp
;
1103 spin_unlock_bh(&ifp
->lock
);
1105 regen_advance
= idev
->cnf
.regen_max_retry
*
1106 idev
->cnf
.dad_transmits
*
1107 idev
->nd_parms
->retrans_time
/ HZ
;
1108 write_unlock(&idev
->lock
);
1110 /* A temporary address is created only if this calculated Preferred
1111 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
1112 * an implementation must not create a temporary address with a zero
1113 * Preferred Lifetime.
1115 if (tmp_prefered_lft
<= regen_advance
) {
1122 addr_flags
= IFA_F_TEMPORARY
;
1123 /* set in addrconf_prefix_rcv() */
1124 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
1125 addr_flags
|= IFA_F_OPTIMISTIC
;
1127 ift
= !max_addresses
||
1128 ipv6_count_addresses(idev
) < max_addresses
?
1129 ipv6_add_addr(idev
, &addr
, tmp_plen
,
1130 ipv6_addr_type(&addr
)&IPV6_ADDR_SCOPE_MASK
,
1132 if (IS_ERR_OR_NULL(ift
)) {
1135 pr_info("%s: retry temporary address regeneration\n", __func__
);
1137 write_lock(&idev
->lock
);
1141 spin_lock_bh(&ift
->lock
);
1143 ift
->valid_lft
= tmp_valid_lft
;
1144 ift
->prefered_lft
= tmp_prefered_lft
;
1146 ift
->tstamp
= tmp_tstamp
;
1147 spin_unlock_bh(&ift
->lock
);
1149 addrconf_dad_start(ift
);
1158 * Choose an appropriate source address (RFC3484)
1161 IPV6_SADDR_RULE_INIT
= 0,
1162 IPV6_SADDR_RULE_LOCAL
,
1163 IPV6_SADDR_RULE_SCOPE
,
1164 IPV6_SADDR_RULE_PREFERRED
,
1165 #ifdef CONFIG_IPV6_MIP6
1166 IPV6_SADDR_RULE_HOA
,
1168 IPV6_SADDR_RULE_OIF
,
1169 IPV6_SADDR_RULE_LABEL
,
1170 #ifdef CONFIG_IPV6_PRIVACY
1171 IPV6_SADDR_RULE_PRIVACY
,
1173 IPV6_SADDR_RULE_ORCHID
,
1174 IPV6_SADDR_RULE_PREFIX
,
1178 struct ipv6_saddr_score
{
1181 struct inet6_ifaddr
*ifa
;
1182 DECLARE_BITMAP(scorebits
, IPV6_SADDR_RULE_MAX
);
1187 struct ipv6_saddr_dst
{
1188 const struct in6_addr
*addr
;
1195 static inline int ipv6_saddr_preferred(int type
)
1197 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|IPV6_ADDR_LOOPBACK
))
1202 static int ipv6_get_saddr_eval(struct net
*net
,
1203 struct ipv6_saddr_score
*score
,
1204 struct ipv6_saddr_dst
*dst
,
1209 if (i
<= score
->rule
) {
1211 case IPV6_SADDR_RULE_SCOPE
:
1212 ret
= score
->scopedist
;
1214 case IPV6_SADDR_RULE_PREFIX
:
1215 ret
= score
->matchlen
;
1218 ret
= !!test_bit(i
, score
->scorebits
);
1224 case IPV6_SADDR_RULE_INIT
:
1225 /* Rule 0: remember if hiscore is not ready yet */
1228 case IPV6_SADDR_RULE_LOCAL
:
1229 /* Rule 1: Prefer same address */
1230 ret
= ipv6_addr_equal(&score
->ifa
->addr
, dst
->addr
);
1232 case IPV6_SADDR_RULE_SCOPE
:
1233 /* Rule 2: Prefer appropriate scope
1238 * ---+--+-+---> scope
1240 * | d is scope of the destination.
1242 * | \ <- smaller scope is better if
1243 * B-15 | \ if scope is enough for destinaion.
1244 * | ret = B - scope (-1 <= scope >= d <= 15).
1246 * |/ <- greater is better
1247 * -C / if scope is not enough for destination.
1248 * /| ret = scope - C (-1 <= d < scope <= 15).
1250 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1251 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1252 * Assume B = 0 and we get C > 29.
1254 ret
= __ipv6_addr_src_scope(score
->addr_type
);
1255 if (ret
>= dst
->scope
)
1258 ret
-= 128; /* 30 is enough */
1259 score
->scopedist
= ret
;
1261 case IPV6_SADDR_RULE_PREFERRED
:
1262 /* Rule 3: Avoid deprecated and optimistic addresses */
1263 ret
= ipv6_saddr_preferred(score
->addr_type
) ||
1264 !(score
->ifa
->flags
& (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
));
1266 #ifdef CONFIG_IPV6_MIP6
1267 case IPV6_SADDR_RULE_HOA
:
1269 /* Rule 4: Prefer home address */
1270 int prefhome
= !(dst
->prefs
& IPV6_PREFER_SRC_COA
);
1271 ret
= !(score
->ifa
->flags
& IFA_F_HOMEADDRESS
) ^ prefhome
;
1275 case IPV6_SADDR_RULE_OIF
:
1276 /* Rule 5: Prefer outgoing interface */
1277 ret
= (!dst
->ifindex
||
1278 dst
->ifindex
== score
->ifa
->idev
->dev
->ifindex
);
1280 case IPV6_SADDR_RULE_LABEL
:
1281 /* Rule 6: Prefer matching label */
1282 ret
= ipv6_addr_label(net
,
1283 &score
->ifa
->addr
, score
->addr_type
,
1284 score
->ifa
->idev
->dev
->ifindex
) == dst
->label
;
1286 #ifdef CONFIG_IPV6_PRIVACY
1287 case IPV6_SADDR_RULE_PRIVACY
:
1289 /* Rule 7: Prefer public address
1290 * Note: prefer temporary address if use_tempaddr >= 2
1292 int preftmp
= dst
->prefs
& (IPV6_PREFER_SRC_PUBLIC
|IPV6_PREFER_SRC_TMP
) ?
1293 !!(dst
->prefs
& IPV6_PREFER_SRC_TMP
) :
1294 score
->ifa
->idev
->cnf
.use_tempaddr
>= 2;
1295 ret
= (!(score
->ifa
->flags
& IFA_F_TEMPORARY
)) ^ preftmp
;
1299 case IPV6_SADDR_RULE_ORCHID
:
1300 /* Rule 8-: Prefer ORCHID vs ORCHID or
1301 * non-ORCHID vs non-ORCHID
1303 ret
= !(ipv6_addr_orchid(&score
->ifa
->addr
) ^
1304 ipv6_addr_orchid(dst
->addr
));
1306 case IPV6_SADDR_RULE_PREFIX
:
1307 /* Rule 8: Use longest matching prefix */
1308 ret
= ipv6_addr_diff(&score
->ifa
->addr
, dst
->addr
);
1309 if (ret
> score
->ifa
->prefix_len
)
1310 ret
= score
->ifa
->prefix_len
;
1311 score
->matchlen
= ret
;
1318 __set_bit(i
, score
->scorebits
);
1324 int ipv6_dev_get_saddr(struct net
*net
, const struct net_device
*dst_dev
,
1325 const struct in6_addr
*daddr
, unsigned int prefs
,
1326 struct in6_addr
*saddr
)
1328 struct ipv6_saddr_score scores
[2],
1329 *score
= &scores
[0], *hiscore
= &scores
[1];
1330 struct ipv6_saddr_dst dst
;
1331 struct net_device
*dev
;
1334 dst_type
= __ipv6_addr_type(daddr
);
1336 dst
.ifindex
= dst_dev
? dst_dev
->ifindex
: 0;
1337 dst
.scope
= __ipv6_addr_src_scope(dst_type
);
1338 dst
.label
= ipv6_addr_label(net
, daddr
, dst_type
, dst
.ifindex
);
1342 hiscore
->ifa
= NULL
;
1346 for_each_netdev_rcu(net
, dev
) {
1347 struct inet6_dev
*idev
;
1349 /* Candidate Source Address (section 4)
1350 * - multicast and link-local destination address,
1351 * the set of candidate source address MUST only
1352 * include addresses assigned to interfaces
1353 * belonging to the same link as the outgoing
1355 * (- For site-local destination addresses, the
1356 * set of candidate source addresses MUST only
1357 * include addresses assigned to interfaces
1358 * belonging to the same site as the outgoing
1361 if (((dst_type
& IPV6_ADDR_MULTICAST
) ||
1362 dst
.scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
) &&
1363 dst
.ifindex
&& dev
->ifindex
!= dst
.ifindex
)
1366 idev
= __in6_dev_get(dev
);
1370 read_lock_bh(&idev
->lock
);
1371 list_for_each_entry(score
->ifa
, &idev
->addr_list
, if_list
) {
1375 * - Tentative Address (RFC2462 section 5.4)
1376 * - A tentative address is not considered
1377 * "assigned to an interface" in the traditional
1378 * sense, unless it is also flagged as optimistic.
1379 * - Candidate Source Address (section 4)
1380 * - In any case, anycast addresses, multicast
1381 * addresses, and the unspecified address MUST
1382 * NOT be included in a candidate set.
1384 if ((score
->ifa
->flags
& IFA_F_TENTATIVE
) &&
1385 (!(score
->ifa
->flags
& IFA_F_OPTIMISTIC
)))
1388 score
->addr_type
= __ipv6_addr_type(&score
->ifa
->addr
);
1390 if (unlikely(score
->addr_type
== IPV6_ADDR_ANY
||
1391 score
->addr_type
& IPV6_ADDR_MULTICAST
)) {
1392 LIMIT_NETDEBUG(KERN_DEBUG
1393 "ADDRCONF: unspecified / multicast address "
1394 "assigned as unicast address on %s",
1400 bitmap_zero(score
->scorebits
, IPV6_SADDR_RULE_MAX
);
1402 for (i
= 0; i
< IPV6_SADDR_RULE_MAX
; i
++) {
1403 int minihiscore
, miniscore
;
1405 minihiscore
= ipv6_get_saddr_eval(net
, hiscore
, &dst
, i
);
1406 miniscore
= ipv6_get_saddr_eval(net
, score
, &dst
, i
);
1408 if (minihiscore
> miniscore
) {
1409 if (i
== IPV6_SADDR_RULE_SCOPE
&&
1410 score
->scopedist
> 0) {
1413 * each remaining entry
1414 * has too small (not enough)
1415 * scope, because ifa entries
1416 * are sorted by their scope
1422 } else if (minihiscore
< miniscore
) {
1424 in6_ifa_put(hiscore
->ifa
);
1426 in6_ifa_hold(score
->ifa
);
1428 swap(hiscore
, score
);
1430 /* restore our iterator */
1431 score
->ifa
= hiscore
->ifa
;
1438 read_unlock_bh(&idev
->lock
);
1443 return -EADDRNOTAVAIL
;
1445 *saddr
= hiscore
->ifa
->addr
;
1446 in6_ifa_put(hiscore
->ifa
);
1449 EXPORT_SYMBOL(ipv6_dev_get_saddr
);
1451 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1452 unsigned char banned_flags
)
1454 struct inet6_dev
*idev
;
1455 int err
= -EADDRNOTAVAIL
;
1458 idev
= __in6_dev_get(dev
);
1460 struct inet6_ifaddr
*ifp
;
1462 read_lock_bh(&idev
->lock
);
1463 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
1464 if (ifp
->scope
== IFA_LINK
&&
1465 !(ifp
->flags
& banned_flags
)) {
1471 read_unlock_bh(&idev
->lock
);
1477 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1480 struct inet6_ifaddr
*ifp
;
1482 read_lock_bh(&idev
->lock
);
1483 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
)
1485 read_unlock_bh(&idev
->lock
);
1489 int ipv6_chk_addr(struct net
*net
, const struct in6_addr
*addr
,
1490 struct net_device
*dev
, int strict
)
1492 struct inet6_ifaddr
*ifp
;
1493 unsigned int hash
= inet6_addr_hash(addr
);
1496 hlist_for_each_entry_rcu(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
1497 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1499 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1500 !(ifp
->flags
&IFA_F_TENTATIVE
) &&
1501 (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1502 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))) {
1503 rcu_read_unlock_bh();
1508 rcu_read_unlock_bh();
1511 EXPORT_SYMBOL(ipv6_chk_addr
);
1513 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
1514 struct net_device
*dev
)
1516 unsigned int hash
= inet6_addr_hash(addr
);
1517 struct inet6_ifaddr
*ifp
;
1519 hlist_for_each_entry(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
1520 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1522 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1523 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1530 int ipv6_chk_prefix(const struct in6_addr
*addr
, struct net_device
*dev
)
1532 struct inet6_dev
*idev
;
1533 struct inet6_ifaddr
*ifa
;
1538 idev
= __in6_dev_get(dev
);
1540 read_lock_bh(&idev
->lock
);
1541 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
1542 onlink
= ipv6_prefix_equal(addr
, &ifa
->addr
,
1547 read_unlock_bh(&idev
->lock
);
1552 EXPORT_SYMBOL(ipv6_chk_prefix
);
1554 struct inet6_ifaddr
*ipv6_get_ifaddr(struct net
*net
, const struct in6_addr
*addr
,
1555 struct net_device
*dev
, int strict
)
1557 struct inet6_ifaddr
*ifp
, *result
= NULL
;
1558 unsigned int hash
= inet6_addr_hash(addr
);
1561 hlist_for_each_entry_rcu_bh(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
1562 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1564 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1565 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1566 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1573 rcu_read_unlock_bh();
1578 /* Gets referenced address, destroys ifaddr */
1580 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
, int dad_failed
)
1582 if (ifp
->flags
&IFA_F_PERMANENT
) {
1583 spin_lock_bh(&ifp
->lock
);
1584 addrconf_del_timer(ifp
);
1585 ifp
->flags
|= IFA_F_TENTATIVE
;
1587 ifp
->flags
|= IFA_F_DADFAILED
;
1588 spin_unlock_bh(&ifp
->lock
);
1590 ipv6_ifa_notify(0, ifp
);
1592 #ifdef CONFIG_IPV6_PRIVACY
1593 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1594 struct inet6_ifaddr
*ifpub
;
1595 spin_lock_bh(&ifp
->lock
);
1598 in6_ifa_hold(ifpub
);
1599 spin_unlock_bh(&ifp
->lock
);
1600 ipv6_create_tempaddr(ifpub
, ifp
);
1603 spin_unlock_bh(&ifp
->lock
);
1611 static int addrconf_dad_end(struct inet6_ifaddr
*ifp
)
1615 spin_lock(&ifp
->state_lock
);
1616 if (ifp
->state
== INET6_IFADDR_STATE_DAD
) {
1617 ifp
->state
= INET6_IFADDR_STATE_POSTDAD
;
1620 spin_unlock(&ifp
->state_lock
);
1625 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1627 struct inet6_dev
*idev
= ifp
->idev
;
1629 if (addrconf_dad_end(ifp
)) {
1634 net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n",
1635 ifp
->idev
->dev
->name
, &ifp
->addr
);
1637 if (idev
->cnf
.accept_dad
> 1 && !idev
->cnf
.disable_ipv6
) {
1638 struct in6_addr addr
;
1640 addr
.s6_addr32
[0] = htonl(0xfe800000);
1641 addr
.s6_addr32
[1] = 0;
1643 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) &&
1644 ipv6_addr_equal(&ifp
->addr
, &addr
)) {
1645 /* DAD failed for link-local based on MAC address */
1646 idev
->cnf
.disable_ipv6
= 1;
1648 pr_info("%s: IPv6 being disabled!\n",
1649 ifp
->idev
->dev
->name
);
1653 addrconf_dad_stop(ifp
, 1);
1656 /* Join to solicited addr multicast group. */
1658 void addrconf_join_solict(struct net_device
*dev
, const struct in6_addr
*addr
)
1660 struct in6_addr maddr
;
1662 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1665 addrconf_addr_solict_mult(addr
, &maddr
);
1666 ipv6_dev_mc_inc(dev
, &maddr
);
1669 void addrconf_leave_solict(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
1671 struct in6_addr maddr
;
1673 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1676 addrconf_addr_solict_mult(addr
, &maddr
);
1677 __ipv6_dev_mc_dec(idev
, &maddr
);
1680 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1682 struct in6_addr addr
;
1683 if (ifp
->prefix_len
== 127) /* RFC 6164 */
1685 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1686 if (ipv6_addr_any(&addr
))
1688 ipv6_dev_ac_inc(ifp
->idev
->dev
, &addr
);
1691 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1693 struct in6_addr addr
;
1694 if (ifp
->prefix_len
== 127) /* RFC 6164 */
1696 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1697 if (ipv6_addr_any(&addr
))
1699 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1702 static int addrconf_ifid_eui48(u8
*eui
, struct net_device
*dev
)
1704 if (dev
->addr_len
!= ETH_ALEN
)
1706 memcpy(eui
, dev
->dev_addr
, 3);
1707 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1710 * The zSeries OSA network cards can be shared among various
1711 * OS instances, but the OSA cards have only one MAC address.
1712 * This leads to duplicate address conflicts in conjunction
1713 * with IPv6 if more than one instance uses the same card.
1715 * The driver for these cards can deliver a unique 16-bit
1716 * identifier for each instance sharing the same card. It is
1717 * placed instead of 0xFFFE in the interface identifier. The
1718 * "u" bit of the interface identifier is not inverted in this
1719 * case. Hence the resulting interface identifier has local
1720 * scope according to RFC2373.
1723 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1724 eui
[4] = dev
->dev_id
& 0xFF;
1733 static int addrconf_ifid_eui64(u8
*eui
, struct net_device
*dev
)
1735 if (dev
->addr_len
!= IEEE802154_ADDR_LEN
)
1737 memcpy(eui
, dev
->dev_addr
, 8);
1742 static int addrconf_ifid_ieee1394(u8
*eui
, struct net_device
*dev
)
1744 union fwnet_hwaddr
*ha
;
1746 if (dev
->addr_len
!= FWNET_ALEN
)
1749 ha
= (union fwnet_hwaddr
*)dev
->dev_addr
;
1751 memcpy(eui
, &ha
->uc
.uniq_id
, sizeof(ha
->uc
.uniq_id
));
1756 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
1758 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1759 if (dev
->addr_len
!= ARCNET_ALEN
)
1762 eui
[7] = *(u8
*)dev
->dev_addr
;
1766 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
1768 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1770 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1775 static int __ipv6_isatap_ifid(u8
*eui
, __be32 addr
)
1779 eui
[0] = (ipv4_is_zeronet(addr
) || ipv4_is_private_10(addr
) ||
1780 ipv4_is_loopback(addr
) || ipv4_is_linklocal_169(addr
) ||
1781 ipv4_is_private_172(addr
) || ipv4_is_test_192(addr
) ||
1782 ipv4_is_anycast_6to4(addr
) || ipv4_is_private_192(addr
) ||
1783 ipv4_is_test_198(addr
) || ipv4_is_multicast(addr
) ||
1784 ipv4_is_lbcast(addr
)) ? 0x00 : 0x02;
1788 memcpy(eui
+ 4, &addr
, 4);
1792 static int addrconf_ifid_sit(u8
*eui
, struct net_device
*dev
)
1794 if (dev
->priv_flags
& IFF_ISATAP
)
1795 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
1799 static int addrconf_ifid_gre(u8
*eui
, struct net_device
*dev
)
1801 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
1804 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1806 switch (dev
->type
) {
1809 return addrconf_ifid_eui48(eui
, dev
);
1811 return addrconf_ifid_arcnet(eui
, dev
);
1812 case ARPHRD_INFINIBAND
:
1813 return addrconf_ifid_infiniband(eui
, dev
);
1815 return addrconf_ifid_sit(eui
, dev
);
1817 return addrconf_ifid_gre(eui
, dev
);
1818 case ARPHRD_IEEE802154
:
1819 return addrconf_ifid_eui64(eui
, dev
);
1820 case ARPHRD_IEEE1394
:
1821 return addrconf_ifid_ieee1394(eui
, dev
);
1826 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1829 struct inet6_ifaddr
*ifp
;
1831 read_lock_bh(&idev
->lock
);
1832 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
1833 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1834 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1839 read_unlock_bh(&idev
->lock
);
1843 #ifdef CONFIG_IPV6_PRIVACY
1844 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1845 static void __ipv6_regen_rndid(struct inet6_dev
*idev
)
1848 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
1849 idev
->rndid
[0] &= ~0x02;
1852 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1853 * check if generated address is not inappropriate
1855 * - Reserved subnet anycast (RFC 2526)
1856 * 11111101 11....11 1xxxxxxx
1857 * - ISATAP (RFC4214) 6.1
1858 * 00-00-5E-FE-xx-xx-xx-xx
1860 * - XXX: already assigned to an address on the device
1862 if (idev
->rndid
[0] == 0xfd &&
1863 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1864 (idev
->rndid
[7]&0x80))
1866 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1867 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1869 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1874 static void ipv6_regen_rndid(unsigned long data
)
1876 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1877 unsigned long expires
;
1880 write_lock_bh(&idev
->lock
);
1885 __ipv6_regen_rndid(idev
);
1888 idev
->cnf
.temp_prefered_lft
* HZ
-
1889 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
-
1890 idev
->cnf
.max_desync_factor
* HZ
;
1891 if (time_before(expires
, jiffies
)) {
1892 pr_warn("%s: too short regeneration interval; timer disabled for %s\n",
1893 __func__
, idev
->dev
->name
);
1897 if (!mod_timer(&idev
->regen_timer
, expires
))
1901 write_unlock_bh(&idev
->lock
);
1902 rcu_read_unlock_bh();
1906 static void __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
)
1908 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1909 __ipv6_regen_rndid(idev
);
1918 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1919 unsigned long expires
, u32 flags
)
1921 struct fib6_config cfg
= {
1922 .fc_table
= RT6_TABLE_PREFIX
,
1923 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1924 .fc_ifindex
= dev
->ifindex
,
1925 .fc_expires
= expires
,
1927 .fc_flags
= RTF_UP
| flags
,
1928 .fc_nlinfo
.nl_net
= dev_net(dev
),
1929 .fc_protocol
= RTPROT_KERNEL
,
1934 /* Prevent useless cloning on PtP SIT.
1935 This thing is done here expecting that the whole
1936 class of non-broadcast devices need not cloning.
1938 #if IS_ENABLED(CONFIG_IPV6_SIT)
1939 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
1940 cfg
.fc_flags
|= RTF_NONEXTHOP
;
1943 ip6_route_add(&cfg
);
1947 static struct rt6_info
*addrconf_get_prefix_route(const struct in6_addr
*pfx
,
1949 const struct net_device
*dev
,
1950 u32 flags
, u32 noflags
)
1952 struct fib6_node
*fn
;
1953 struct rt6_info
*rt
= NULL
;
1954 struct fib6_table
*table
;
1956 table
= fib6_get_table(dev_net(dev
), RT6_TABLE_PREFIX
);
1960 read_lock_bh(&table
->tb6_lock
);
1961 fn
= fib6_locate(&table
->tb6_root
, pfx
, plen
, NULL
, 0);
1964 for (rt
= fn
->leaf
; rt
; rt
= rt
->dst
.rt6_next
) {
1965 if (rt
->dst
.dev
->ifindex
!= dev
->ifindex
)
1967 if ((rt
->rt6i_flags
& flags
) != flags
)
1969 if ((rt
->rt6i_flags
& noflags
) != 0)
1975 read_unlock_bh(&table
->tb6_lock
);
1980 /* Create "default" multicast route to the interface */
1982 static void addrconf_add_mroute(struct net_device
*dev
)
1984 struct fib6_config cfg
= {
1985 .fc_table
= RT6_TABLE_LOCAL
,
1986 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1987 .fc_ifindex
= dev
->ifindex
,
1990 .fc_nlinfo
.nl_net
= dev_net(dev
),
1993 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
1995 ip6_route_add(&cfg
);
1998 #if IS_ENABLED(CONFIG_IPV6_SIT)
1999 static void sit_route_add(struct net_device
*dev
)
2001 struct fib6_config cfg
= {
2002 .fc_table
= RT6_TABLE_MAIN
,
2003 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
2004 .fc_ifindex
= dev
->ifindex
,
2006 .fc_flags
= RTF_UP
| RTF_NONEXTHOP
,
2007 .fc_nlinfo
.nl_net
= dev_net(dev
),
2010 /* prefix length - 96 bits "::d.d.d.d" */
2011 ip6_route_add(&cfg
);
2015 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
2017 struct inet6_dev
*idev
;
2021 idev
= ipv6_find_idev(dev
);
2023 return ERR_PTR(-ENOBUFS
);
2025 if (idev
->cnf
.disable_ipv6
)
2026 return ERR_PTR(-EACCES
);
2028 /* Add default multicast route */
2029 if (!(dev
->flags
& IFF_LOOPBACK
))
2030 addrconf_add_mroute(dev
);
2035 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
, bool sllao
)
2037 struct prefix_info
*pinfo
;
2041 struct inet6_dev
*in6_dev
;
2042 struct net
*net
= dev_net(dev
);
2044 pinfo
= (struct prefix_info
*) opt
;
2046 if (len
< sizeof(struct prefix_info
)) {
2047 ADBG(("addrconf: prefix option too short\n"));
2052 * Validation checks ([ADDRCONF], page 19)
2055 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
2057 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
2060 valid_lft
= ntohl(pinfo
->valid
);
2061 prefered_lft
= ntohl(pinfo
->prefered
);
2063 if (prefered_lft
> valid_lft
) {
2064 net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n");
2068 in6_dev
= in6_dev_get(dev
);
2070 if (in6_dev
== NULL
) {
2071 net_dbg_ratelimited("addrconf: device %s not configured\n",
2077 * Two things going on here:
2078 * 1) Add routes for on-link prefixes
2079 * 2) Configure prefixes with the auto flag set
2082 if (pinfo
->onlink
) {
2083 struct rt6_info
*rt
;
2084 unsigned long rt_expires
;
2086 /* Avoid arithmetic overflow. Really, we could
2087 * save rt_expires in seconds, likely valid_lft,
2088 * but it would require division in fib gc, that it
2092 rt_expires
= addrconf_timeout_fixup(valid_lft
, HZ
);
2094 rt_expires
= addrconf_timeout_fixup(valid_lft
, USER_HZ
);
2096 if (addrconf_finite_timeout(rt_expires
))
2099 rt
= addrconf_get_prefix_route(&pinfo
->prefix
,
2102 RTF_ADDRCONF
| RTF_PREFIX_RT
,
2103 RTF_GATEWAY
| RTF_DEFAULT
);
2106 /* Autoconf prefix route */
2107 if (valid_lft
== 0) {
2110 } else if (addrconf_finite_timeout(rt_expires
)) {
2112 rt6_set_expires(rt
, jiffies
+ rt_expires
);
2114 rt6_clean_expires(rt
);
2116 } else if (valid_lft
) {
2117 clock_t expires
= 0;
2118 int flags
= RTF_ADDRCONF
| RTF_PREFIX_RT
;
2119 if (addrconf_finite_timeout(rt_expires
)) {
2121 flags
|= RTF_EXPIRES
;
2122 expires
= jiffies_to_clock_t(rt_expires
);
2124 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
2125 dev
, expires
, flags
);
2130 /* Try to figure out our local address for this prefix */
2132 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
2133 struct inet6_ifaddr
*ifp
;
2134 struct in6_addr addr
;
2135 int create
= 0, update_lft
= 0;
2136 bool tokenized
= false;
2138 if (pinfo
->prefix_len
== 64) {
2139 memcpy(&addr
, &pinfo
->prefix
, 8);
2141 if (!ipv6_addr_any(&in6_dev
->token
)) {
2142 read_lock_bh(&in6_dev
->lock
);
2143 memcpy(addr
.s6_addr
+ 8,
2144 in6_dev
->token
.s6_addr
+ 8, 8);
2145 read_unlock_bh(&in6_dev
->lock
);
2147 } else if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
2148 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
2149 in6_dev_put(in6_dev
);
2154 net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n",
2156 in6_dev_put(in6_dev
);
2161 ifp
= ipv6_get_ifaddr(net
, &addr
, dev
, 1);
2163 if (ifp
== NULL
&& valid_lft
) {
2164 int max_addresses
= in6_dev
->cnf
.max_addresses
;
2167 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2168 if (in6_dev
->cnf
.optimistic_dad
&&
2169 !net
->ipv6
.devconf_all
->forwarding
&& sllao
)
2170 addr_flags
= IFA_F_OPTIMISTIC
;
2173 /* Do not allow to create too much of autoconfigured
2174 * addresses; this would be too easy way to crash kernel.
2176 if (!max_addresses
||
2177 ipv6_count_addresses(in6_dev
) < max_addresses
)
2178 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
2179 addr_type
&IPV6_ADDR_SCOPE_MASK
,
2182 if (IS_ERR_OR_NULL(ifp
)) {
2183 in6_dev_put(in6_dev
);
2187 update_lft
= create
= 1;
2188 ifp
->cstamp
= jiffies
;
2189 ifp
->tokenized
= tokenized
;
2190 addrconf_dad_start(ifp
);
2196 #ifdef CONFIG_IPV6_PRIVACY
2197 struct inet6_ifaddr
*ift
;
2201 /* update lifetime (RFC2462 5.5.3 e) */
2202 spin_lock(&ifp
->lock
);
2204 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
2205 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
2208 if (!update_lft
&& stored_lft
) {
2209 if (valid_lft
> MIN_VALID_LIFETIME
||
2210 valid_lft
> stored_lft
)
2212 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
2213 /* valid_lft <= stored_lft is always true */
2215 * RFC 4862 Section 5.5.3e:
2216 * "Note that the preferred lifetime of
2217 * the corresponding address is always
2218 * reset to the Preferred Lifetime in
2219 * the received Prefix Information
2220 * option, regardless of whether the
2221 * valid lifetime is also reset or
2224 * So if the preferred lifetime in
2225 * this advertisement is different
2226 * than what we have stored, but the
2227 * valid lifetime is invalid, just
2228 * reset prefered_lft.
2230 * We must set the valid lifetime
2231 * to the stored lifetime since we'll
2232 * be updating the timestamp below,
2233 * else we'll set it back to the
2236 if (prefered_lft
!= ifp
->prefered_lft
) {
2237 valid_lft
= stored_lft
;
2241 valid_lft
= MIN_VALID_LIFETIME
;
2242 if (valid_lft
< prefered_lft
)
2243 prefered_lft
= valid_lft
;
2249 ifp
->valid_lft
= valid_lft
;
2250 ifp
->prefered_lft
= prefered_lft
;
2253 ifp
->flags
&= ~IFA_F_DEPRECATED
;
2254 spin_unlock(&ifp
->lock
);
2256 if (!(flags
&IFA_F_TENTATIVE
))
2257 ipv6_ifa_notify(0, ifp
);
2259 spin_unlock(&ifp
->lock
);
2261 #ifdef CONFIG_IPV6_PRIVACY
2262 read_lock_bh(&in6_dev
->lock
);
2263 /* update all temporary addresses in the list */
2264 list_for_each_entry(ift
, &in6_dev
->tempaddr_list
,
2266 int age
, max_valid
, max_prefered
;
2268 if (ifp
!= ift
->ifpub
)
2272 * RFC 4941 section 3.3:
2273 * If a received option will extend the lifetime
2274 * of a public address, the lifetimes of
2275 * temporary addresses should be extended,
2276 * subject to the overall constraint that no
2277 * temporary addresses should ever remain
2278 * "valid" or "preferred" for a time longer than
2279 * (TEMP_VALID_LIFETIME) or
2280 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR),
2283 age
= (now
- ift
->cstamp
) / HZ
;
2284 max_valid
= in6_dev
->cnf
.temp_valid_lft
- age
;
2288 max_prefered
= in6_dev
->cnf
.temp_prefered_lft
-
2289 in6_dev
->cnf
.max_desync_factor
-
2291 if (max_prefered
< 0)
2294 if (valid_lft
> max_valid
)
2295 valid_lft
= max_valid
;
2297 if (prefered_lft
> max_prefered
)
2298 prefered_lft
= max_prefered
;
2300 spin_lock(&ift
->lock
);
2302 ift
->valid_lft
= valid_lft
;
2303 ift
->prefered_lft
= prefered_lft
;
2305 if (prefered_lft
> 0)
2306 ift
->flags
&= ~IFA_F_DEPRECATED
;
2308 spin_unlock(&ift
->lock
);
2309 if (!(flags
&IFA_F_TENTATIVE
))
2310 ipv6_ifa_notify(0, ift
);
2313 if ((create
|| list_empty(&in6_dev
->tempaddr_list
)) && in6_dev
->cnf
.use_tempaddr
> 0) {
2315 * When a new public address is created as
2316 * described in [ADDRCONF], also create a new
2317 * temporary address. Also create a temporary
2318 * address if it's enabled but no temporary
2319 * address currently exists.
2321 read_unlock_bh(&in6_dev
->lock
);
2322 ipv6_create_tempaddr(ifp
, NULL
);
2324 read_unlock_bh(&in6_dev
->lock
);
2331 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
2332 in6_dev_put(in6_dev
);
2336 * Set destination address.
2337 * Special case for SIT interfaces where we create a new "virtual"
2340 int addrconf_set_dstaddr(struct net
*net
, void __user
*arg
)
2342 struct in6_ifreq ireq
;
2343 struct net_device
*dev
;
2349 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2352 dev
= __dev_get_by_index(net
, ireq
.ifr6_ifindex
);
2358 #if IS_ENABLED(CONFIG_IPV6_SIT)
2359 if (dev
->type
== ARPHRD_SIT
) {
2360 const struct net_device_ops
*ops
= dev
->netdev_ops
;
2362 struct ip_tunnel_parm p
;
2364 err
= -EADDRNOTAVAIL
;
2365 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
2368 memset(&p
, 0, sizeof(p
));
2369 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
2373 p
.iph
.protocol
= IPPROTO_IPV6
;
2375 ifr
.ifr_ifru
.ifru_data
= (__force
void __user
*)&p
;
2377 if (ops
->ndo_do_ioctl
) {
2378 mm_segment_t oldfs
= get_fs();
2381 err
= ops
->ndo_do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
2388 dev
= __dev_get_by_name(net
, p
.name
);
2391 err
= dev_open(dev
);
2402 * Manual configuration of address on an interface
2404 static int inet6_addr_add(struct net
*net
, int ifindex
, const struct in6_addr
*pfx
,
2405 unsigned int plen
, __u8 ifa_flags
, __u32 prefered_lft
,
2408 struct inet6_ifaddr
*ifp
;
2409 struct inet6_dev
*idev
;
2410 struct net_device
*dev
;
2414 unsigned long timeout
;
2421 /* check the lifetime */
2422 if (!valid_lft
|| prefered_lft
> valid_lft
)
2425 dev
= __dev_get_by_index(net
, ifindex
);
2429 idev
= addrconf_add_dev(dev
);
2431 return PTR_ERR(idev
);
2433 scope
= ipv6_addr_scope(pfx
);
2435 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
2436 if (addrconf_finite_timeout(timeout
)) {
2437 expires
= jiffies_to_clock_t(timeout
* HZ
);
2438 valid_lft
= timeout
;
2439 flags
= RTF_EXPIRES
;
2443 ifa_flags
|= IFA_F_PERMANENT
;
2446 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
2447 if (addrconf_finite_timeout(timeout
)) {
2449 ifa_flags
|= IFA_F_DEPRECATED
;
2450 prefered_lft
= timeout
;
2453 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, ifa_flags
);
2456 spin_lock_bh(&ifp
->lock
);
2457 ifp
->valid_lft
= valid_lft
;
2458 ifp
->prefered_lft
= prefered_lft
;
2459 ifp
->tstamp
= jiffies
;
2460 spin_unlock_bh(&ifp
->lock
);
2462 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
2465 * Note that section 3.1 of RFC 4429 indicates
2466 * that the Optimistic flag should not be set for
2467 * manually configured addresses
2469 addrconf_dad_start(ifp
);
2475 return PTR_ERR(ifp
);
2478 static int inet6_addr_del(struct net
*net
, int ifindex
, const struct in6_addr
*pfx
,
2481 struct inet6_ifaddr
*ifp
;
2482 struct inet6_dev
*idev
;
2483 struct net_device
*dev
;
2488 dev
= __dev_get_by_index(net
, ifindex
);
2492 if ((idev
= __in6_dev_get(dev
)) == NULL
)
2495 read_lock_bh(&idev
->lock
);
2496 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
2497 if (ifp
->prefix_len
== plen
&&
2498 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
2500 read_unlock_bh(&idev
->lock
);
2504 /* If the last address is deleted administratively,
2505 disable IPv6 on this interface.
2507 if (list_empty(&idev
->addr_list
))
2508 addrconf_ifdown(idev
->dev
, 1);
2512 read_unlock_bh(&idev
->lock
);
2513 return -EADDRNOTAVAIL
;
2517 int addrconf_add_ifaddr(struct net
*net
, void __user
*arg
)
2519 struct in6_ifreq ireq
;
2522 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
2525 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2529 err
= inet6_addr_add(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2530 ireq
.ifr6_prefixlen
, IFA_F_PERMANENT
,
2531 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2536 int addrconf_del_ifaddr(struct net
*net
, void __user
*arg
)
2538 struct in6_ifreq ireq
;
2541 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
2544 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2548 err
= inet6_addr_del(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2549 ireq
.ifr6_prefixlen
);
2554 static void add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
2555 int plen
, int scope
)
2557 struct inet6_ifaddr
*ifp
;
2559 ifp
= ipv6_add_addr(idev
, addr
, plen
, scope
, IFA_F_PERMANENT
);
2561 spin_lock_bh(&ifp
->lock
);
2562 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2563 spin_unlock_bh(&ifp
->lock
);
2564 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2569 #if IS_ENABLED(CONFIG_IPV6_SIT)
2570 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
2572 struct in6_addr addr
;
2573 struct net_device
*dev
;
2574 struct net
*net
= dev_net(idev
->dev
);
2579 memset(&addr
, 0, sizeof(struct in6_addr
));
2580 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
2582 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
2583 addr
.s6_addr32
[0] = htonl(0xfe800000);
2586 scope
= IPV6_ADDR_COMPATv4
;
2589 if (addr
.s6_addr32
[3]) {
2590 add_addr(idev
, &addr
, 128, scope
);
2594 for_each_netdev(net
, dev
) {
2595 struct in_device
*in_dev
= __in_dev_get_rtnl(dev
);
2596 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
2597 struct in_ifaddr
*ifa
;
2601 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
2604 addr
.s6_addr32
[3] = ifa
->ifa_local
;
2606 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
2608 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
2609 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2613 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2618 add_addr(idev
, &addr
, plen
, flag
);
2625 static void init_loopback(struct net_device
*dev
)
2627 struct inet6_dev
*idev
;
2628 struct net_device
*sp_dev
;
2629 struct inet6_ifaddr
*sp_ifa
;
2630 struct rt6_info
*sp_rt
;
2636 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2637 pr_debug("%s: add_dev failed\n", __func__
);
2641 add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
);
2643 /* Add routes to other interface's IPv6 addresses */
2644 for_each_netdev(dev_net(dev
), sp_dev
) {
2645 if (!strcmp(sp_dev
->name
, dev
->name
))
2648 idev
= __in6_dev_get(sp_dev
);
2652 read_lock_bh(&idev
->lock
);
2653 list_for_each_entry(sp_ifa
, &idev
->addr_list
, if_list
) {
2655 if (sp_ifa
->flags
& (IFA_F_DADFAILED
| IFA_F_TENTATIVE
))
2658 sp_rt
= addrconf_dst_alloc(idev
, &sp_ifa
->addr
, 0);
2660 /* Failure cases are ignored */
2664 read_unlock_bh(&idev
->lock
);
2668 static void addrconf_add_linklocal(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
2670 struct inet6_ifaddr
*ifp
;
2671 u32 addr_flags
= IFA_F_PERMANENT
;
2673 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2674 if (idev
->cnf
.optimistic_dad
&&
2675 !dev_net(idev
->dev
)->ipv6
.devconf_all
->forwarding
)
2676 addr_flags
|= IFA_F_OPTIMISTIC
;
2680 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, addr_flags
);
2682 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
2683 addrconf_dad_start(ifp
);
2688 static void addrconf_dev_config(struct net_device
*dev
)
2690 struct in6_addr addr
;
2691 struct inet6_dev
*idev
;
2695 if ((dev
->type
!= ARPHRD_ETHER
) &&
2696 (dev
->type
!= ARPHRD_FDDI
) &&
2697 (dev
->type
!= ARPHRD_ARCNET
) &&
2698 (dev
->type
!= ARPHRD_INFINIBAND
) &&
2699 (dev
->type
!= ARPHRD_IEEE802154
) &&
2700 (dev
->type
!= ARPHRD_IEEE1394
)) {
2701 /* Alas, we support only Ethernet autoconfiguration. */
2705 idev
= addrconf_add_dev(dev
);
2709 memset(&addr
, 0, sizeof(struct in6_addr
));
2710 addr
.s6_addr32
[0] = htonl(0xFE800000);
2712 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
2713 addrconf_add_linklocal(idev
, &addr
);
2716 #if IS_ENABLED(CONFIG_IPV6_SIT)
2717 static void addrconf_sit_config(struct net_device
*dev
)
2719 struct inet6_dev
*idev
;
2724 * Configure the tunnel with one of our IPv4
2725 * addresses... we should configure all of
2726 * our v4 addrs in the tunnel
2729 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2730 pr_debug("%s: add_dev failed\n", __func__
);
2734 if (dev
->priv_flags
& IFF_ISATAP
) {
2735 struct in6_addr addr
;
2737 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2738 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
2739 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
))
2740 addrconf_add_linklocal(idev
, &addr
);
2744 sit_add_v4_addrs(idev
);
2746 if (dev
->flags
&IFF_POINTOPOINT
)
2747 addrconf_add_mroute(dev
);
2753 #if IS_ENABLED(CONFIG_NET_IPGRE)
2754 static void addrconf_gre_config(struct net_device
*dev
)
2756 struct inet6_dev
*idev
;
2757 struct in6_addr addr
;
2759 pr_info("%s(%s)\n", __func__
, dev
->name
);
2763 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2764 pr_debug("%s: add_dev failed\n", __func__
);
2768 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2769 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
2771 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
))
2772 addrconf_add_linklocal(idev
, &addr
);
2777 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
2779 struct in6_addr lladdr
;
2781 if (!ipv6_get_lladdr(link_dev
, &lladdr
, IFA_F_TENTATIVE
)) {
2782 addrconf_add_linklocal(idev
, &lladdr
);
2788 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
2790 struct net_device
*link_dev
;
2791 struct net
*net
= dev_net(idev
->dev
);
2793 /* first try to inherit the link-local address from the link device */
2794 if (idev
->dev
->iflink
&&
2795 (link_dev
= __dev_get_by_index(net
, idev
->dev
->iflink
))) {
2796 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2799 /* then try to inherit it from any device */
2800 for_each_netdev(net
, link_dev
) {
2801 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2804 pr_debug("init ip6-ip6: add_linklocal failed\n");
2808 * Autoconfigure tunnel with a link-local address so routing protocols,
2809 * DHCPv6, MLD etc. can be run over the virtual link
2812 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
2814 struct inet6_dev
*idev
;
2818 idev
= addrconf_add_dev(dev
);
2820 pr_debug("init ip6-ip6: add_dev failed\n");
2823 ip6_tnl_add_linklocal(idev
);
2826 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
2829 struct net_device
*dev
= (struct net_device
*) data
;
2830 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2831 int run_pending
= 0;
2835 case NETDEV_REGISTER
:
2836 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2837 idev
= ipv6_add_dev(dev
);
2839 return notifier_from_errno(-ENOMEM
);
2845 if (dev
->flags
& IFF_SLAVE
)
2848 if (event
== NETDEV_UP
) {
2849 if (!addrconf_qdisc_ok(dev
)) {
2850 /* device is not ready yet. */
2851 pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n",
2856 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
)
2857 idev
= ipv6_add_dev(dev
);
2860 idev
->if_flags
|= IF_READY
;
2864 if (!addrconf_qdisc_ok(dev
)) {
2865 /* device is still not ready. */
2870 if (idev
->if_flags
& IF_READY
)
2871 /* device is already configured. */
2873 idev
->if_flags
|= IF_READY
;
2876 pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n",
2882 switch (dev
->type
) {
2883 #if IS_ENABLED(CONFIG_IPV6_SIT)
2885 addrconf_sit_config(dev
);
2888 #if IS_ENABLED(CONFIG_NET_IPGRE)
2890 addrconf_gre_config(dev
);
2893 case ARPHRD_TUNNEL6
:
2894 addrconf_ip6_tnl_config(dev
);
2896 case ARPHRD_LOOPBACK
:
2901 addrconf_dev_config(dev
);
2907 addrconf_dad_run(idev
);
2910 * If the MTU changed during the interface down,
2911 * when the interface up, the changed MTU must be
2912 * reflected in the idev as well as routers.
2914 if (idev
->cnf
.mtu6
!= dev
->mtu
&&
2915 dev
->mtu
>= IPV6_MIN_MTU
) {
2916 rt6_mtu_change(dev
, dev
->mtu
);
2917 idev
->cnf
.mtu6
= dev
->mtu
;
2919 idev
->tstamp
= jiffies
;
2920 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2923 * If the changed mtu during down is lower than
2924 * IPV6_MIN_MTU stop IPv6 on this interface.
2926 if (dev
->mtu
< IPV6_MIN_MTU
)
2927 addrconf_ifdown(dev
, 1);
2931 case NETDEV_CHANGEMTU
:
2932 if (idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2933 rt6_mtu_change(dev
, dev
->mtu
);
2934 idev
->cnf
.mtu6
= dev
->mtu
;
2938 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2939 idev
= ipv6_add_dev(dev
);
2945 * MTU falled under IPV6_MIN_MTU.
2946 * Stop IPv6 on this interface.
2950 case NETDEV_UNREGISTER
:
2952 * Remove all addresses from this interface.
2954 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2957 case NETDEV_CHANGENAME
:
2959 snmp6_unregister_dev(idev
);
2960 addrconf_sysctl_unregister(idev
);
2961 addrconf_sysctl_register(idev
);
2962 err
= snmp6_register_dev(idev
);
2964 return notifier_from_errno(err
);
2968 case NETDEV_PRE_TYPE_CHANGE
:
2969 case NETDEV_POST_TYPE_CHANGE
:
2970 addrconf_type_change(dev
, event
);
2978 * addrconf module should be notified of a device going up
2980 static struct notifier_block ipv6_dev_notf
= {
2981 .notifier_call
= addrconf_notify
,
2984 static void addrconf_type_change(struct net_device
*dev
, unsigned long event
)
2986 struct inet6_dev
*idev
;
2989 idev
= __in6_dev_get(dev
);
2991 if (event
== NETDEV_POST_TYPE_CHANGE
)
2992 ipv6_mc_remap(idev
);
2993 else if (event
== NETDEV_PRE_TYPE_CHANGE
)
2994 ipv6_mc_unmap(idev
);
2997 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2999 struct net
*net
= dev_net(dev
);
3000 struct inet6_dev
*idev
;
3001 struct inet6_ifaddr
*ifa
;
3006 rt6_ifdown(net
, dev
);
3007 neigh_ifdown(&nd_tbl
, dev
);
3009 idev
= __in6_dev_get(dev
);
3014 * Step 1: remove reference to ipv6 device from parent device.
3020 /* protected by rtnl_lock */
3021 RCU_INIT_POINTER(dev
->ip6_ptr
, NULL
);
3023 /* Step 1.5: remove snmp6 entry */
3024 snmp6_unregister_dev(idev
);
3028 /* Step 2: clear hash table */
3029 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
3030 struct hlist_head
*h
= &inet6_addr_lst
[i
];
3032 spin_lock_bh(&addrconf_hash_lock
);
3034 hlist_for_each_entry_rcu(ifa
, h
, addr_lst
) {
3035 if (ifa
->idev
== idev
) {
3036 hlist_del_init_rcu(&ifa
->addr_lst
);
3037 addrconf_del_timer(ifa
);
3041 spin_unlock_bh(&addrconf_hash_lock
);
3044 write_lock_bh(&idev
->lock
);
3046 /* Step 2: clear flags for stateless addrconf */
3048 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
3050 #ifdef CONFIG_IPV6_PRIVACY
3051 if (how
&& del_timer(&idev
->regen_timer
))
3054 /* Step 3: clear tempaddr list */
3055 while (!list_empty(&idev
->tempaddr_list
)) {
3056 ifa
= list_first_entry(&idev
->tempaddr_list
,
3057 struct inet6_ifaddr
, tmp_list
);
3058 list_del(&ifa
->tmp_list
);
3059 write_unlock_bh(&idev
->lock
);
3060 spin_lock_bh(&ifa
->lock
);
3063 in6_ifa_put(ifa
->ifpub
);
3066 spin_unlock_bh(&ifa
->lock
);
3068 write_lock_bh(&idev
->lock
);
3072 while (!list_empty(&idev
->addr_list
)) {
3073 ifa
= list_first_entry(&idev
->addr_list
,
3074 struct inet6_ifaddr
, if_list
);
3075 addrconf_del_timer(ifa
);
3077 list_del(&ifa
->if_list
);
3079 write_unlock_bh(&idev
->lock
);
3081 spin_lock_bh(&ifa
->state_lock
);
3083 ifa
->state
= INET6_IFADDR_STATE_DEAD
;
3084 spin_unlock_bh(&ifa
->state_lock
);
3086 if (state
!= INET6_IFADDR_STATE_DEAD
) {
3087 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
3088 inet6addr_notifier_call_chain(NETDEV_DOWN
, ifa
);
3092 write_lock_bh(&idev
->lock
);
3095 write_unlock_bh(&idev
->lock
);
3097 /* Step 5: Discard multicast list */
3099 ipv6_mc_destroy_dev(idev
);
3103 idev
->tstamp
= jiffies
;
3105 /* Last: Shot the device (if unregistered) */
3107 addrconf_sysctl_unregister(idev
);
3108 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
3109 neigh_ifdown(&nd_tbl
, dev
);
3115 static void addrconf_rs_timer(unsigned long data
)
3117 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
3118 struct inet6_dev
*idev
= ifp
->idev
;
3120 read_lock(&idev
->lock
);
3121 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
))
3124 if (!ipv6_accept_ra(idev
))
3127 /* Announcement received after solicitation was sent */
3128 if (idev
->if_flags
& IF_RA_RCVD
)
3131 spin_lock(&ifp
->lock
);
3132 if (ifp
->probes
++ < idev
->cnf
.rtr_solicits
) {
3133 /* The wait after the last probe can be shorter */
3134 addrconf_mod_timer(ifp
, AC_RS
,
3135 (ifp
->probes
== idev
->cnf
.rtr_solicits
) ?
3136 idev
->cnf
.rtr_solicit_delay
:
3137 idev
->cnf
.rtr_solicit_interval
);
3138 spin_unlock(&ifp
->lock
);
3140 ndisc_send_rs(idev
->dev
, &ifp
->addr
, &in6addr_linklocal_allrouters
);
3142 spin_unlock(&ifp
->lock
);
3144 * Note: we do not support deprecated "all on-link"
3145 * assumption any longer.
3147 pr_debug("%s: no IPv6 routers present\n", idev
->dev
->name
);
3151 read_unlock(&idev
->lock
);
3156 * Duplicate Address Detection
3158 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
3160 unsigned long rand_num
;
3161 struct inet6_dev
*idev
= ifp
->idev
;
3163 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
3166 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
3168 ifp
->probes
= idev
->cnf
.dad_transmits
;
3169 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
3172 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
)
3174 struct inet6_dev
*idev
= ifp
->idev
;
3175 struct net_device
*dev
= idev
->dev
;
3177 addrconf_join_solict(dev
, &ifp
->addr
);
3179 net_srandom(ifp
->addr
.s6_addr32
[3]);
3181 read_lock_bh(&idev
->lock
);
3182 spin_lock(&ifp
->lock
);
3183 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
)
3186 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
3187 idev
->cnf
.accept_dad
< 1 ||
3188 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
3189 ifp
->flags
& IFA_F_NODAD
) {
3190 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
3191 spin_unlock(&ifp
->lock
);
3192 read_unlock_bh(&idev
->lock
);
3194 addrconf_dad_completed(ifp
);
3198 if (!(idev
->if_flags
& IF_READY
)) {
3199 spin_unlock(&ifp
->lock
);
3200 read_unlock_bh(&idev
->lock
);
3202 * If the device is not ready:
3203 * - keep it tentative if it is a permanent address.
3204 * - otherwise, kill it.
3207 addrconf_dad_stop(ifp
, 0);
3212 * Optimistic nodes can start receiving
3215 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
3216 ip6_ins_rt(ifp
->rt
);
3218 addrconf_dad_kick(ifp
);
3220 spin_unlock(&ifp
->lock
);
3221 read_unlock_bh(&idev
->lock
);
3224 static void addrconf_dad_timer(unsigned long data
)
3226 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
3227 struct inet6_dev
*idev
= ifp
->idev
;
3228 struct in6_addr mcaddr
;
3230 if (!ifp
->probes
&& addrconf_dad_end(ifp
))
3233 read_lock(&idev
->lock
);
3234 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
)) {
3235 read_unlock(&idev
->lock
);
3239 spin_lock(&ifp
->lock
);
3240 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
) {
3241 spin_unlock(&ifp
->lock
);
3242 read_unlock(&idev
->lock
);
3246 if (ifp
->probes
== 0) {
3248 * DAD was successful
3251 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
3252 spin_unlock(&ifp
->lock
);
3253 read_unlock(&idev
->lock
);
3255 addrconf_dad_completed(ifp
);
3261 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
3262 spin_unlock(&ifp
->lock
);
3263 read_unlock(&idev
->lock
);
3265 /* send a neighbour solicitation for our addr */
3266 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
3267 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &in6addr_any
);
3272 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
3274 struct net_device
*dev
= ifp
->idev
->dev
;
3277 * Configure the address for reception. Now it is valid.
3280 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
3282 /* If added prefix is link local and we are prepared to process
3283 router advertisements, start sending router solicitations.
3286 if (ipv6_accept_ra(ifp
->idev
) &&
3287 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
3288 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
3289 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
3291 * If a host as already performed a random delay
3292 * [...] as part of DAD [...] there is no need
3293 * to delay again before sending the first RS
3295 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &in6addr_linklocal_allrouters
);
3297 spin_lock_bh(&ifp
->lock
);
3299 ifp
->idev
->if_flags
|= IF_RS_SENT
;
3300 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
3301 spin_unlock_bh(&ifp
->lock
);
3305 static void addrconf_dad_run(struct inet6_dev
*idev
)
3307 struct inet6_ifaddr
*ifp
;
3309 read_lock_bh(&idev
->lock
);
3310 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
3311 spin_lock(&ifp
->lock
);
3312 if (ifp
->flags
& IFA_F_TENTATIVE
&&
3313 ifp
->state
== INET6_IFADDR_STATE_DAD
)
3314 addrconf_dad_kick(ifp
);
3315 spin_unlock(&ifp
->lock
);
3317 read_unlock_bh(&idev
->lock
);
3320 #ifdef CONFIG_PROC_FS
3321 struct if6_iter_state
{
3322 struct seq_net_private p
;
3327 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
, loff_t pos
)
3329 struct inet6_ifaddr
*ifa
= NULL
;
3330 struct if6_iter_state
*state
= seq
->private;
3331 struct net
*net
= seq_file_net(seq
);
3334 /* initial bucket if pos is 0 */
3340 for (; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
3341 hlist_for_each_entry_rcu_bh(ifa
, &inet6_addr_lst
[state
->bucket
],
3343 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
3345 /* sync with offset */
3346 if (p
< state
->offset
) {
3354 /* prepare for next bucket */
3361 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
,
3362 struct inet6_ifaddr
*ifa
)
3364 struct if6_iter_state
*state
= seq
->private;
3365 struct net
*net
= seq_file_net(seq
);
3367 hlist_for_each_entry_continue_rcu_bh(ifa
, addr_lst
) {
3368 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
3374 while (++state
->bucket
< IN6_ADDR_HSIZE
) {
3376 hlist_for_each_entry_rcu_bh(ifa
,
3377 &inet6_addr_lst
[state
->bucket
], addr_lst
) {
3378 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
3388 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
3392 return if6_get_first(seq
, *pos
);
3395 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
3397 struct inet6_ifaddr
*ifa
;
3399 ifa
= if6_get_next(seq
, v
);
3404 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
3407 rcu_read_unlock_bh();
3410 static int if6_seq_show(struct seq_file
*seq
, void *v
)
3412 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
3413 seq_printf(seq
, "%pi6 %02x %02x %02x %02x %8s\n",
3415 ifp
->idev
->dev
->ifindex
,
3419 ifp
->idev
->dev
->name
);
3423 static const struct seq_operations if6_seq_ops
= {
3424 .start
= if6_seq_start
,
3425 .next
= if6_seq_next
,
3426 .show
= if6_seq_show
,
3427 .stop
= if6_seq_stop
,
3430 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
3432 return seq_open_net(inode
, file
, &if6_seq_ops
,
3433 sizeof(struct if6_iter_state
));
3436 static const struct file_operations if6_fops
= {
3437 .owner
= THIS_MODULE
,
3438 .open
= if6_seq_open
,
3440 .llseek
= seq_lseek
,
3441 .release
= seq_release_net
,
3444 static int __net_init
if6_proc_net_init(struct net
*net
)
3446 if (!proc_create("if_inet6", S_IRUGO
, net
->proc_net
, &if6_fops
))
3451 static void __net_exit
if6_proc_net_exit(struct net
*net
)
3453 remove_proc_entry("if_inet6", net
->proc_net
);
3456 static struct pernet_operations if6_proc_net_ops
= {
3457 .init
= if6_proc_net_init
,
3458 .exit
= if6_proc_net_exit
,
3461 int __init
if6_proc_init(void)
3463 return register_pernet_subsys(&if6_proc_net_ops
);
3466 void if6_proc_exit(void)
3468 unregister_pernet_subsys(&if6_proc_net_ops
);
3470 #endif /* CONFIG_PROC_FS */
3472 #if IS_ENABLED(CONFIG_IPV6_MIP6)
3473 /* Check if address is a home address configured on any interface. */
3474 int ipv6_chk_home_addr(struct net
*net
, const struct in6_addr
*addr
)
3477 struct inet6_ifaddr
*ifp
= NULL
;
3478 unsigned int hash
= inet6_addr_hash(addr
);
3481 hlist_for_each_entry_rcu_bh(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
3482 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
3484 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
3485 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
3490 rcu_read_unlock_bh();
3496 * Periodic address status verification
3499 static void addrconf_verify(unsigned long foo
)
3501 unsigned long now
, next
, next_sec
, next_sched
;
3502 struct inet6_ifaddr
*ifp
;
3506 spin_lock(&addrconf_verify_lock
);
3508 next
= round_jiffies_up(now
+ ADDR_CHECK_FREQUENCY
);
3510 del_timer(&addr_chk_timer
);
3512 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
3514 hlist_for_each_entry_rcu_bh(ifp
,
3515 &inet6_addr_lst
[i
], addr_lst
) {
3518 if (ifp
->flags
& IFA_F_PERMANENT
)
3521 spin_lock(&ifp
->lock
);
3522 /* We try to batch several events at once. */
3523 age
= (now
- ifp
->tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
3525 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
3526 age
>= ifp
->valid_lft
) {
3527 spin_unlock(&ifp
->lock
);
3531 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
3532 spin_unlock(&ifp
->lock
);
3534 } else if (age
>= ifp
->prefered_lft
) {
3535 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
3538 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
3540 ifp
->flags
|= IFA_F_DEPRECATED
;
3543 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
3544 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
3546 spin_unlock(&ifp
->lock
);
3551 ipv6_ifa_notify(0, ifp
);
3555 #ifdef CONFIG_IPV6_PRIVACY
3556 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
3557 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
3558 unsigned long regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
3559 ifp
->idev
->cnf
.dad_transmits
*
3560 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
3562 if (age
>= ifp
->prefered_lft
- regen_advance
) {
3563 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
3564 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3565 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3566 if (!ifp
->regen_count
&& ifpub
) {
3569 in6_ifa_hold(ifpub
);
3570 spin_unlock(&ifp
->lock
);
3572 spin_lock(&ifpub
->lock
);
3573 ifpub
->regen_count
= 0;
3574 spin_unlock(&ifpub
->lock
);
3575 ipv6_create_tempaddr(ifpub
, ifp
);
3580 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
3581 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
3582 spin_unlock(&ifp
->lock
);
3585 /* ifp->prefered_lft <= ifp->valid_lft */
3586 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3587 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3588 spin_unlock(&ifp
->lock
);
3593 next_sec
= round_jiffies_up(next
);
3596 /* If rounded timeout is accurate enough, accept it. */
3597 if (time_before(next_sec
, next
+ ADDRCONF_TIMER_FUZZ
))
3598 next_sched
= next_sec
;
3600 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
3601 if (time_before(next_sched
, jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
))
3602 next_sched
= jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
;
3604 ADBG((KERN_DEBUG
"now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
3605 now
, next
, next_sec
, next_sched
));
3607 addr_chk_timer
.expires
= next_sched
;
3608 add_timer(&addr_chk_timer
);
3609 spin_unlock(&addrconf_verify_lock
);
3610 rcu_read_unlock_bh();
3613 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
)
3615 struct in6_addr
*pfx
= NULL
;
3618 pfx
= nla_data(addr
);
3621 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
3624 pfx
= nla_data(local
);
3630 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
3631 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
3632 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
3633 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
3637 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
3639 struct net
*net
= sock_net(skb
->sk
);
3640 struct ifaddrmsg
*ifm
;
3641 struct nlattr
*tb
[IFA_MAX
+1];
3642 struct in6_addr
*pfx
;
3645 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3649 ifm
= nlmsg_data(nlh
);
3650 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3654 return inet6_addr_del(net
, ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
3657 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u8 ifa_flags
,
3658 u32 prefered_lft
, u32 valid_lft
)
3662 unsigned long timeout
;
3664 if (!valid_lft
|| (prefered_lft
> valid_lft
))
3667 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
3668 if (addrconf_finite_timeout(timeout
)) {
3669 expires
= jiffies_to_clock_t(timeout
* HZ
);
3670 valid_lft
= timeout
;
3671 flags
= RTF_EXPIRES
;
3675 ifa_flags
|= IFA_F_PERMANENT
;
3678 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
3679 if (addrconf_finite_timeout(timeout
)) {
3681 ifa_flags
|= IFA_F_DEPRECATED
;
3682 prefered_lft
= timeout
;
3685 spin_lock_bh(&ifp
->lock
);
3686 ifp
->flags
= (ifp
->flags
& ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
| IFA_F_HOMEADDRESS
)) | ifa_flags
;
3687 ifp
->tstamp
= jiffies
;
3688 ifp
->valid_lft
= valid_lft
;
3689 ifp
->prefered_lft
= prefered_lft
;
3691 spin_unlock_bh(&ifp
->lock
);
3692 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
3693 ipv6_ifa_notify(0, ifp
);
3695 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
3703 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
3705 struct net
*net
= sock_net(skb
->sk
);
3706 struct ifaddrmsg
*ifm
;
3707 struct nlattr
*tb
[IFA_MAX
+1];
3708 struct in6_addr
*pfx
;
3709 struct inet6_ifaddr
*ifa
;
3710 struct net_device
*dev
;
3711 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
3715 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3719 ifm
= nlmsg_data(nlh
);
3720 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3724 if (tb
[IFA_CACHEINFO
]) {
3725 struct ifa_cacheinfo
*ci
;
3727 ci
= nla_data(tb
[IFA_CACHEINFO
]);
3728 valid_lft
= ci
->ifa_valid
;
3729 preferred_lft
= ci
->ifa_prefered
;
3731 preferred_lft
= INFINITY_LIFE_TIME
;
3732 valid_lft
= INFINITY_LIFE_TIME
;
3735 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3739 /* We ignore other flags so far. */
3740 ifa_flags
= ifm
->ifa_flags
& (IFA_F_NODAD
| IFA_F_HOMEADDRESS
);
3742 ifa
= ipv6_get_ifaddr(net
, pfx
, dev
, 1);
3745 * It would be best to check for !NLM_F_CREATE here but
3746 * userspace alreay relies on not having to provide this.
3748 return inet6_addr_add(net
, ifm
->ifa_index
, pfx
,
3749 ifm
->ifa_prefixlen
, ifa_flags
,
3750 preferred_lft
, valid_lft
);
3753 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
3754 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
3757 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
3764 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u8 flags
,
3765 u8 scope
, int ifindex
)
3767 struct ifaddrmsg
*ifm
;
3769 ifm
= nlmsg_data(nlh
);
3770 ifm
->ifa_family
= AF_INET6
;
3771 ifm
->ifa_prefixlen
= prefixlen
;
3772 ifm
->ifa_flags
= flags
;
3773 ifm
->ifa_scope
= scope
;
3774 ifm
->ifa_index
= ifindex
;
3777 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
3778 unsigned long tstamp
, u32 preferred
, u32 valid
)
3780 struct ifa_cacheinfo ci
;
3782 ci
.cstamp
= cstamp_delta(cstamp
);
3783 ci
.tstamp
= cstamp_delta(tstamp
);
3784 ci
.ifa_prefered
= preferred
;
3785 ci
.ifa_valid
= valid
;
3787 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
3790 static inline int rt_scope(int ifa_scope
)
3792 if (ifa_scope
& IFA_HOST
)
3793 return RT_SCOPE_HOST
;
3794 else if (ifa_scope
& IFA_LINK
)
3795 return RT_SCOPE_LINK
;
3796 else if (ifa_scope
& IFA_SITE
)
3797 return RT_SCOPE_SITE
;
3799 return RT_SCOPE_UNIVERSE
;
3802 static inline int inet6_ifaddr_msgsize(void)
3804 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
3805 + nla_total_size(16) /* IFA_ADDRESS */
3806 + nla_total_size(sizeof(struct ifa_cacheinfo
));
3809 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
3810 u32 portid
, u32 seq
, int event
, unsigned int flags
)
3812 struct nlmsghdr
*nlh
;
3813 u32 preferred
, valid
;
3815 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3819 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
3820 ifa
->idev
->dev
->ifindex
);
3822 if (!(ifa
->flags
&IFA_F_PERMANENT
)) {
3823 preferred
= ifa
->prefered_lft
;
3824 valid
= ifa
->valid_lft
;
3825 if (preferred
!= INFINITY_LIFE_TIME
) {
3826 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
3827 if (preferred
> tval
)
3831 if (valid
!= INFINITY_LIFE_TIME
) {
3839 preferred
= INFINITY_LIFE_TIME
;
3840 valid
= INFINITY_LIFE_TIME
;
3843 if (nla_put(skb
, IFA_ADDRESS
, 16, &ifa
->addr
) < 0 ||
3844 put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0) {
3845 nlmsg_cancel(skb
, nlh
);
3849 return nlmsg_end(skb
, nlh
);
3852 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
3853 u32 portid
, u32 seq
, int event
, u16 flags
)
3855 struct nlmsghdr
*nlh
;
3856 u8 scope
= RT_SCOPE_UNIVERSE
;
3857 int ifindex
= ifmca
->idev
->dev
->ifindex
;
3859 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
3860 scope
= RT_SCOPE_SITE
;
3862 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3866 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3867 if (nla_put(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
) < 0 ||
3868 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
3869 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3870 nlmsg_cancel(skb
, nlh
);
3874 return nlmsg_end(skb
, nlh
);
3877 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
3878 u32 portid
, u32 seq
, int event
, unsigned int flags
)
3880 struct nlmsghdr
*nlh
;
3881 u8 scope
= RT_SCOPE_UNIVERSE
;
3882 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
3884 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
3885 scope
= RT_SCOPE_SITE
;
3887 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3891 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3892 if (nla_put(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
) < 0 ||
3893 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
3894 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3895 nlmsg_cancel(skb
, nlh
);
3899 return nlmsg_end(skb
, nlh
);
3908 /* called with rcu_read_lock() */
3909 static int in6_dump_addrs(struct inet6_dev
*idev
, struct sk_buff
*skb
,
3910 struct netlink_callback
*cb
, enum addr_type_t type
,
3911 int s_ip_idx
, int *p_ip_idx
)
3913 struct ifmcaddr6
*ifmca
;
3914 struct ifacaddr6
*ifaca
;
3916 int ip_idx
= *p_ip_idx
;
3918 read_lock_bh(&idev
->lock
);
3920 case UNICAST_ADDR
: {
3921 struct inet6_ifaddr
*ifa
;
3923 /* unicast address incl. temp addr */
3924 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
3925 if (++ip_idx
< s_ip_idx
)
3927 err
= inet6_fill_ifaddr(skb
, ifa
,
3928 NETLINK_CB(cb
->skb
).portid
,
3934 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
3938 case MULTICAST_ADDR
:
3939 /* multicast address */
3940 for (ifmca
= idev
->mc_list
; ifmca
;
3941 ifmca
= ifmca
->next
, ip_idx
++) {
3942 if (ip_idx
< s_ip_idx
)
3944 err
= inet6_fill_ifmcaddr(skb
, ifmca
,
3945 NETLINK_CB(cb
->skb
).portid
,
3954 /* anycast address */
3955 for (ifaca
= idev
->ac_list
; ifaca
;
3956 ifaca
= ifaca
->aca_next
, ip_idx
++) {
3957 if (ip_idx
< s_ip_idx
)
3959 err
= inet6_fill_ifacaddr(skb
, ifaca
,
3960 NETLINK_CB(cb
->skb
).portid
,
3971 read_unlock_bh(&idev
->lock
);
3976 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3977 enum addr_type_t type
)
3979 struct net
*net
= sock_net(skb
->sk
);
3982 int s_idx
, s_ip_idx
;
3983 struct net_device
*dev
;
3984 struct inet6_dev
*idev
;
3985 struct hlist_head
*head
;
3988 s_idx
= idx
= cb
->args
[1];
3989 s_ip_idx
= ip_idx
= cb
->args
[2];
3992 cb
->seq
= atomic_read(&net
->ipv6
.dev_addr_genid
) ^ net
->dev_base_seq
;
3993 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
3995 head
= &net
->dev_index_head
[h
];
3996 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
3999 if (h
> s_h
|| idx
> s_idx
)
4002 idev
= __in6_dev_get(dev
);
4006 if (in6_dump_addrs(idev
, skb
, cb
, type
,
4007 s_ip_idx
, &ip_idx
) <= 0)
4017 cb
->args
[2] = ip_idx
;
4022 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4024 enum addr_type_t type
= UNICAST_ADDR
;
4026 return inet6_dump_addr(skb
, cb
, type
);
4029 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4031 enum addr_type_t type
= MULTICAST_ADDR
;
4033 return inet6_dump_addr(skb
, cb
, type
);
4037 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4039 enum addr_type_t type
= ANYCAST_ADDR
;
4041 return inet6_dump_addr(skb
, cb
, type
);
4044 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
*nlh
)
4046 struct net
*net
= sock_net(in_skb
->sk
);
4047 struct ifaddrmsg
*ifm
;
4048 struct nlattr
*tb
[IFA_MAX
+1];
4049 struct in6_addr
*addr
= NULL
;
4050 struct net_device
*dev
= NULL
;
4051 struct inet6_ifaddr
*ifa
;
4052 struct sk_buff
*skb
;
4055 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
4059 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
4065 ifm
= nlmsg_data(nlh
);
4067 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
4069 ifa
= ipv6_get_ifaddr(net
, addr
, dev
, 1);
4071 err
= -EADDRNOTAVAIL
;
4075 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
);
4081 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).portid
,
4082 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
4084 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4085 WARN_ON(err
== -EMSGSIZE
);
4089 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).portid
);
4096 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
4098 struct sk_buff
*skb
;
4099 struct net
*net
= dev_net(ifa
->idev
->dev
);
4102 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
4106 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
4108 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4109 WARN_ON(err
== -EMSGSIZE
);
4113 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
4117 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
4120 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
4121 __s32
*array
, int bytes
)
4123 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
4125 memset(array
, 0, bytes
);
4126 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
4127 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
4128 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
4129 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
4130 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
4131 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
4132 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
4133 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
4134 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] =
4135 jiffies_to_msecs(cnf
->rtr_solicit_interval
);
4136 array
[DEVCONF_RTR_SOLICIT_DELAY
] =
4137 jiffies_to_msecs(cnf
->rtr_solicit_delay
);
4138 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
4139 #ifdef CONFIG_IPV6_PRIVACY
4140 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
4141 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
4142 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
4143 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
4144 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
4146 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
4147 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
4148 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
4149 #ifdef CONFIG_IPV6_ROUTER_PREF
4150 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
4151 array
[DEVCONF_RTR_PROBE_INTERVAL
] =
4152 jiffies_to_msecs(cnf
->rtr_probe_interval
);
4153 #ifdef CONFIG_IPV6_ROUTE_INFO
4154 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
4157 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
4158 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
4159 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4160 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
4162 #ifdef CONFIG_IPV6_MROUTE
4163 array
[DEVCONF_MC_FORWARDING
] = cnf
->mc_forwarding
;
4165 array
[DEVCONF_DISABLE_IPV6
] = cnf
->disable_ipv6
;
4166 array
[DEVCONF_ACCEPT_DAD
] = cnf
->accept_dad
;
4167 array
[DEVCONF_FORCE_TLLAO
] = cnf
->force_tllao
;
4168 array
[DEVCONF_NDISC_NOTIFY
] = cnf
->ndisc_notify
;
4171 static inline size_t inet6_ifla6_size(void)
4173 return nla_total_size(4) /* IFLA_INET6_FLAGS */
4174 + nla_total_size(sizeof(struct ifla_cacheinfo
))
4175 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
4176 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
4177 + nla_total_size(ICMP6_MIB_MAX
* 8) /* IFLA_INET6_ICMP6STATS */
4178 + nla_total_size(sizeof(struct in6_addr
)); /* IFLA_INET6_TOKEN */
4181 static inline size_t inet6_if_nlmsg_size(void)
4183 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
4184 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
4185 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
4186 + nla_total_size(4) /* IFLA_MTU */
4187 + nla_total_size(4) /* IFLA_LINK */
4188 + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
4191 static inline void __snmp6_fill_statsdev(u64
*stats
, atomic_long_t
*mib
,
4192 int items
, int bytes
)
4195 int pad
= bytes
- sizeof(u64
) * items
;
4198 /* Use put_unaligned() because stats may not be aligned for u64. */
4199 put_unaligned(items
, &stats
[0]);
4200 for (i
= 1; i
< items
; i
++)
4201 put_unaligned(atomic_long_read(&mib
[i
]), &stats
[i
]);
4203 memset(&stats
[items
], 0, pad
);
4206 static inline void __snmp6_fill_stats64(u64
*stats
, void __percpu
**mib
,
4207 int items
, int bytes
, size_t syncpoff
)
4210 int pad
= bytes
- sizeof(u64
) * items
;
4213 /* Use put_unaligned() because stats may not be aligned for u64. */
4214 put_unaligned(items
, &stats
[0]);
4215 for (i
= 1; i
< items
; i
++)
4216 put_unaligned(snmp_fold_field64(mib
, i
, syncpoff
), &stats
[i
]);
4218 memset(&stats
[items
], 0, pad
);
4221 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
4225 case IFLA_INET6_STATS
:
4226 __snmp6_fill_stats64(stats
, (void __percpu
**)idev
->stats
.ipv6
,
4227 IPSTATS_MIB_MAX
, bytes
, offsetof(struct ipstats_mib
, syncp
));
4229 case IFLA_INET6_ICMP6STATS
:
4230 __snmp6_fill_statsdev(stats
, idev
->stats
.icmpv6dev
->mibs
, ICMP6_MIB_MAX
, bytes
);
4235 static int inet6_fill_ifla6_attrs(struct sk_buff
*skb
, struct inet6_dev
*idev
)
4238 struct ifla_cacheinfo ci
;
4240 if (nla_put_u32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
))
4241 goto nla_put_failure
;
4242 ci
.max_reasm_len
= IPV6_MAXPLEN
;
4243 ci
.tstamp
= cstamp_delta(idev
->tstamp
);
4244 ci
.reachable_time
= jiffies_to_msecs(idev
->nd_parms
->reachable_time
);
4245 ci
.retrans_time
= jiffies_to_msecs(idev
->nd_parms
->retrans_time
);
4246 if (nla_put(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
))
4247 goto nla_put_failure
;
4248 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
4250 goto nla_put_failure
;
4251 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
4253 /* XXX - MC not implemented */
4255 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
4257 goto nla_put_failure
;
4258 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
4260 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
4262 goto nla_put_failure
;
4263 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
4265 nla
= nla_reserve(skb
, IFLA_INET6_TOKEN
, sizeof(struct in6_addr
));
4267 goto nla_put_failure
;
4268 read_lock_bh(&idev
->lock
);
4269 memcpy(nla_data(nla
), idev
->token
.s6_addr
, nla_len(nla
));
4270 read_unlock_bh(&idev
->lock
);
4278 static size_t inet6_get_link_af_size(const struct net_device
*dev
)
4280 if (!__in6_dev_get(dev
))
4283 return inet6_ifla6_size();
4286 static int inet6_fill_link_af(struct sk_buff
*skb
, const struct net_device
*dev
)
4288 struct inet6_dev
*idev
= __in6_dev_get(dev
);
4293 if (inet6_fill_ifla6_attrs(skb
, idev
) < 0)
4299 static int inet6_set_iftoken(struct inet6_dev
*idev
, struct in6_addr
*token
)
4301 struct inet6_ifaddr
*ifp
;
4302 struct net_device
*dev
= idev
->dev
;
4303 bool update_rs
= false;
4307 if (ipv6_addr_any(token
))
4309 if (dev
->flags
& (IFF_LOOPBACK
| IFF_NOARP
))
4311 if (!ipv6_accept_ra(idev
))
4313 if (idev
->cnf
.rtr_solicits
<= 0)
4316 write_lock_bh(&idev
->lock
);
4318 BUILD_BUG_ON(sizeof(token
->s6_addr
) != 16);
4319 memcpy(idev
->token
.s6_addr
+ 8, token
->s6_addr
+ 8, 8);
4321 write_unlock_bh(&idev
->lock
);
4323 if (!idev
->dead
&& (idev
->if_flags
& IF_READY
)) {
4324 struct in6_addr ll_addr
;
4326 ipv6_get_lladdr(dev
, &ll_addr
, IFA_F_TENTATIVE
|
4329 /* If we're not ready, then normal ifup will take care
4330 * of this. Otherwise, we need to request our rs here.
4332 ndisc_send_rs(dev
, &ll_addr
, &in6addr_linklocal_allrouters
);
4336 write_lock_bh(&idev
->lock
);
4339 idev
->if_flags
|= IF_RS_SENT
;
4341 /* Well, that's kinda nasty ... */
4342 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
4343 spin_lock(&ifp
->lock
);
4344 if (ifp
->tokenized
) {
4346 ifp
->prefered_lft
= 0;
4348 spin_unlock(&ifp
->lock
);
4351 write_unlock_bh(&idev
->lock
);
4355 static int inet6_set_link_af(struct net_device
*dev
, const struct nlattr
*nla
)
4358 struct inet6_dev
*idev
= __in6_dev_get(dev
);
4359 struct nlattr
*tb
[IFLA_INET6_MAX
+ 1];
4362 return -EAFNOSUPPORT
;
4364 if (nla_parse_nested(tb
, IFLA_INET6_MAX
, nla
, NULL
) < 0)
4367 if (tb
[IFLA_INET6_TOKEN
])
4368 err
= inet6_set_iftoken(idev
, nla_data(tb
[IFLA_INET6_TOKEN
]));
4373 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
4374 u32 portid
, u32 seq
, int event
, unsigned int flags
)
4376 struct net_device
*dev
= idev
->dev
;
4377 struct ifinfomsg
*hdr
;
4378 struct nlmsghdr
*nlh
;
4381 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*hdr
), flags
);
4385 hdr
= nlmsg_data(nlh
);
4386 hdr
->ifi_family
= AF_INET6
;
4388 hdr
->ifi_type
= dev
->type
;
4389 hdr
->ifi_index
= dev
->ifindex
;
4390 hdr
->ifi_flags
= dev_get_flags(dev
);
4391 hdr
->ifi_change
= 0;
4393 if (nla_put_string(skb
, IFLA_IFNAME
, dev
->name
) ||
4395 nla_put(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
)) ||
4396 nla_put_u32(skb
, IFLA_MTU
, dev
->mtu
) ||
4397 (dev
->ifindex
!= dev
->iflink
&&
4398 nla_put_u32(skb
, IFLA_LINK
, dev
->iflink
)))
4399 goto nla_put_failure
;
4400 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
4401 if (protoinfo
== NULL
)
4402 goto nla_put_failure
;
4404 if (inet6_fill_ifla6_attrs(skb
, idev
) < 0)
4405 goto nla_put_failure
;
4407 nla_nest_end(skb
, protoinfo
);
4408 return nlmsg_end(skb
, nlh
);
4411 nlmsg_cancel(skb
, nlh
);
4415 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4417 struct net
*net
= sock_net(skb
->sk
);
4420 struct net_device
*dev
;
4421 struct inet6_dev
*idev
;
4422 struct hlist_head
*head
;
4425 s_idx
= cb
->args
[1];
4428 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
4430 head
= &net
->dev_index_head
[h
];
4431 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
4434 idev
= __in6_dev_get(dev
);
4437 if (inet6_fill_ifinfo(skb
, idev
,
4438 NETLINK_CB(cb
->skb
).portid
,
4440 RTM_NEWLINK
, NLM_F_MULTI
) <= 0)
4454 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
4456 struct sk_buff
*skb
;
4457 struct net
*net
= dev_net(idev
->dev
);
4460 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
4464 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
4466 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
4467 WARN_ON(err
== -EMSGSIZE
);
4471 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFINFO
, NULL
, GFP_ATOMIC
);
4475 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFINFO
, err
);
4478 static inline size_t inet6_prefix_nlmsg_size(void)
4480 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
4481 + nla_total_size(sizeof(struct in6_addr
))
4482 + nla_total_size(sizeof(struct prefix_cacheinfo
));
4485 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
4486 struct prefix_info
*pinfo
, u32 portid
, u32 seq
,
4487 int event
, unsigned int flags
)
4489 struct prefixmsg
*pmsg
;
4490 struct nlmsghdr
*nlh
;
4491 struct prefix_cacheinfo ci
;
4493 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*pmsg
), flags
);
4497 pmsg
= nlmsg_data(nlh
);
4498 pmsg
->prefix_family
= AF_INET6
;
4499 pmsg
->prefix_pad1
= 0;
4500 pmsg
->prefix_pad2
= 0;
4501 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
4502 pmsg
->prefix_len
= pinfo
->prefix_len
;
4503 pmsg
->prefix_type
= pinfo
->type
;
4504 pmsg
->prefix_pad3
= 0;
4505 pmsg
->prefix_flags
= 0;
4507 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
4508 if (pinfo
->autoconf
)
4509 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
4511 if (nla_put(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
))
4512 goto nla_put_failure
;
4513 ci
.preferred_time
= ntohl(pinfo
->prefered
);
4514 ci
.valid_time
= ntohl(pinfo
->valid
);
4515 if (nla_put(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
))
4516 goto nla_put_failure
;
4517 return nlmsg_end(skb
, nlh
);
4520 nlmsg_cancel(skb
, nlh
);
4524 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
4525 struct prefix_info
*pinfo
)
4527 struct sk_buff
*skb
;
4528 struct net
*net
= dev_net(idev
->dev
);
4531 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
4535 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
4537 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
4538 WARN_ON(err
== -EMSGSIZE
);
4542 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
4546 rtnl_set_sk_err(net
, RTNLGRP_IPV6_PREFIX
, err
);
4549 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
4551 struct net
*net
= dev_net(ifp
->idev
->dev
);
4553 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
4558 * If the address was optimistic
4559 * we inserted the route at the start of
4560 * our DAD process, so we don't need
4563 if (!(ifp
->rt
->rt6i_node
))
4564 ip6_ins_rt(ifp
->rt
);
4565 if (ifp
->idev
->cnf
.forwarding
)
4566 addrconf_join_anycast(ifp
);
4569 if (ifp
->idev
->cnf
.forwarding
)
4570 addrconf_leave_anycast(ifp
);
4571 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
4572 dst_hold(&ifp
->rt
->dst
);
4574 if (ip6_del_rt(ifp
->rt
))
4575 dst_free(&ifp
->rt
->dst
);
4578 atomic_inc(&net
->ipv6
.dev_addr_genid
);
4581 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
4584 if (likely(ifp
->idev
->dead
== 0))
4585 __ipv6_ifa_notify(event
, ifp
);
4586 rcu_read_unlock_bh();
4589 #ifdef CONFIG_SYSCTL
4592 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
,
4593 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4595 int *valp
= ctl
->data
;
4602 * ctl->data points to idev->cnf.forwarding, we should
4603 * not modify it until we get the rtnl lock.
4608 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
4611 ret
= addrconf_fixup_forwarding(ctl
, valp
, val
);
4617 static void dev_disable_change(struct inet6_dev
*idev
)
4619 if (!idev
|| !idev
->dev
)
4622 if (idev
->cnf
.disable_ipv6
)
4623 addrconf_notify(NULL
, NETDEV_DOWN
, idev
->dev
);
4625 addrconf_notify(NULL
, NETDEV_UP
, idev
->dev
);
4628 static void addrconf_disable_change(struct net
*net
, __s32 newf
)
4630 struct net_device
*dev
;
4631 struct inet6_dev
*idev
;
4634 for_each_netdev_rcu(net
, dev
) {
4635 idev
= __in6_dev_get(dev
);
4637 int changed
= (!idev
->cnf
.disable_ipv6
) ^ (!newf
);
4638 idev
->cnf
.disable_ipv6
= newf
;
4640 dev_disable_change(idev
);
4646 static int addrconf_disable_ipv6(struct ctl_table
*table
, int *p
, int newf
)
4651 if (!rtnl_trylock())
4652 return restart_syscall();
4654 net
= (struct net
*)table
->extra2
;
4658 if (p
== &net
->ipv6
.devconf_dflt
->disable_ipv6
) {
4663 if (p
== &net
->ipv6
.devconf_all
->disable_ipv6
) {
4664 net
->ipv6
.devconf_dflt
->disable_ipv6
= newf
;
4665 addrconf_disable_change(net
, newf
);
4666 } else if ((!newf
) ^ (!old
))
4667 dev_disable_change((struct inet6_dev
*)table
->extra1
);
4674 int addrconf_sysctl_disable(ctl_table
*ctl
, int write
,
4675 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4677 int *valp
= ctl
->data
;
4684 * ctl->data points to idev->cnf.disable_ipv6, we should
4685 * not modify it until we get the rtnl lock.
4690 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
4693 ret
= addrconf_disable_ipv6(ctl
, valp
, val
);
4699 static struct addrconf_sysctl_table
4701 struct ctl_table_header
*sysctl_header
;
4702 ctl_table addrconf_vars
[DEVCONF_MAX
+1];
4703 } addrconf_sysctl __read_mostly
= {
4704 .sysctl_header
= NULL
,
4707 .procname
= "forwarding",
4708 .data
= &ipv6_devconf
.forwarding
,
4709 .maxlen
= sizeof(int),
4711 .proc_handler
= addrconf_sysctl_forward
,
4714 .procname
= "hop_limit",
4715 .data
= &ipv6_devconf
.hop_limit
,
4716 .maxlen
= sizeof(int),
4718 .proc_handler
= proc_dointvec
,
4722 .data
= &ipv6_devconf
.mtu6
,
4723 .maxlen
= sizeof(int),
4725 .proc_handler
= proc_dointvec
,
4728 .procname
= "accept_ra",
4729 .data
= &ipv6_devconf
.accept_ra
,
4730 .maxlen
= sizeof(int),
4732 .proc_handler
= proc_dointvec
,
4735 .procname
= "accept_redirects",
4736 .data
= &ipv6_devconf
.accept_redirects
,
4737 .maxlen
= sizeof(int),
4739 .proc_handler
= proc_dointvec
,
4742 .procname
= "autoconf",
4743 .data
= &ipv6_devconf
.autoconf
,
4744 .maxlen
= sizeof(int),
4746 .proc_handler
= proc_dointvec
,
4749 .procname
= "dad_transmits",
4750 .data
= &ipv6_devconf
.dad_transmits
,
4751 .maxlen
= sizeof(int),
4753 .proc_handler
= proc_dointvec
,
4756 .procname
= "router_solicitations",
4757 .data
= &ipv6_devconf
.rtr_solicits
,
4758 .maxlen
= sizeof(int),
4760 .proc_handler
= proc_dointvec
,
4763 .procname
= "router_solicitation_interval",
4764 .data
= &ipv6_devconf
.rtr_solicit_interval
,
4765 .maxlen
= sizeof(int),
4767 .proc_handler
= proc_dointvec_jiffies
,
4770 .procname
= "router_solicitation_delay",
4771 .data
= &ipv6_devconf
.rtr_solicit_delay
,
4772 .maxlen
= sizeof(int),
4774 .proc_handler
= proc_dointvec_jiffies
,
4777 .procname
= "force_mld_version",
4778 .data
= &ipv6_devconf
.force_mld_version
,
4779 .maxlen
= sizeof(int),
4781 .proc_handler
= proc_dointvec
,
4783 #ifdef CONFIG_IPV6_PRIVACY
4785 .procname
= "use_tempaddr",
4786 .data
= &ipv6_devconf
.use_tempaddr
,
4787 .maxlen
= sizeof(int),
4789 .proc_handler
= proc_dointvec
,
4792 .procname
= "temp_valid_lft",
4793 .data
= &ipv6_devconf
.temp_valid_lft
,
4794 .maxlen
= sizeof(int),
4796 .proc_handler
= proc_dointvec
,
4799 .procname
= "temp_prefered_lft",
4800 .data
= &ipv6_devconf
.temp_prefered_lft
,
4801 .maxlen
= sizeof(int),
4803 .proc_handler
= proc_dointvec
,
4806 .procname
= "regen_max_retry",
4807 .data
= &ipv6_devconf
.regen_max_retry
,
4808 .maxlen
= sizeof(int),
4810 .proc_handler
= proc_dointvec
,
4813 .procname
= "max_desync_factor",
4814 .data
= &ipv6_devconf
.max_desync_factor
,
4815 .maxlen
= sizeof(int),
4817 .proc_handler
= proc_dointvec
,
4821 .procname
= "max_addresses",
4822 .data
= &ipv6_devconf
.max_addresses
,
4823 .maxlen
= sizeof(int),
4825 .proc_handler
= proc_dointvec
,
4828 .procname
= "accept_ra_defrtr",
4829 .data
= &ipv6_devconf
.accept_ra_defrtr
,
4830 .maxlen
= sizeof(int),
4832 .proc_handler
= proc_dointvec
,
4835 .procname
= "accept_ra_pinfo",
4836 .data
= &ipv6_devconf
.accept_ra_pinfo
,
4837 .maxlen
= sizeof(int),
4839 .proc_handler
= proc_dointvec
,
4841 #ifdef CONFIG_IPV6_ROUTER_PREF
4843 .procname
= "accept_ra_rtr_pref",
4844 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
4845 .maxlen
= sizeof(int),
4847 .proc_handler
= proc_dointvec
,
4850 .procname
= "router_probe_interval",
4851 .data
= &ipv6_devconf
.rtr_probe_interval
,
4852 .maxlen
= sizeof(int),
4854 .proc_handler
= proc_dointvec_jiffies
,
4856 #ifdef CONFIG_IPV6_ROUTE_INFO
4858 .procname
= "accept_ra_rt_info_max_plen",
4859 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
4860 .maxlen
= sizeof(int),
4862 .proc_handler
= proc_dointvec
,
4867 .procname
= "proxy_ndp",
4868 .data
= &ipv6_devconf
.proxy_ndp
,
4869 .maxlen
= sizeof(int),
4871 .proc_handler
= proc_dointvec
,
4874 .procname
= "accept_source_route",
4875 .data
= &ipv6_devconf
.accept_source_route
,
4876 .maxlen
= sizeof(int),
4878 .proc_handler
= proc_dointvec
,
4880 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4882 .procname
= "optimistic_dad",
4883 .data
= &ipv6_devconf
.optimistic_dad
,
4884 .maxlen
= sizeof(int),
4886 .proc_handler
= proc_dointvec
,
4890 #ifdef CONFIG_IPV6_MROUTE
4892 .procname
= "mc_forwarding",
4893 .data
= &ipv6_devconf
.mc_forwarding
,
4894 .maxlen
= sizeof(int),
4896 .proc_handler
= proc_dointvec
,
4900 .procname
= "disable_ipv6",
4901 .data
= &ipv6_devconf
.disable_ipv6
,
4902 .maxlen
= sizeof(int),
4904 .proc_handler
= addrconf_sysctl_disable
,
4907 .procname
= "accept_dad",
4908 .data
= &ipv6_devconf
.accept_dad
,
4909 .maxlen
= sizeof(int),
4911 .proc_handler
= proc_dointvec
,
4914 .procname
= "force_tllao",
4915 .data
= &ipv6_devconf
.force_tllao
,
4916 .maxlen
= sizeof(int),
4918 .proc_handler
= proc_dointvec
4921 .procname
= "ndisc_notify",
4922 .data
= &ipv6_devconf
.ndisc_notify
,
4923 .maxlen
= sizeof(int),
4925 .proc_handler
= proc_dointvec
4933 static int __addrconf_sysctl_register(struct net
*net
, char *dev_name
,
4934 struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
4937 struct addrconf_sysctl_table
*t
;
4938 char path
[sizeof("net/ipv6/conf/") + IFNAMSIZ
];
4940 t
= kmemdup(&addrconf_sysctl
, sizeof(*t
), GFP_KERNEL
);
4944 for (i
= 0; t
->addrconf_vars
[i
].data
; i
++) {
4945 t
->addrconf_vars
[i
].data
+= (char *)p
- (char *)&ipv6_devconf
;
4946 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
4947 t
->addrconf_vars
[i
].extra2
= net
;
4950 snprintf(path
, sizeof(path
), "net/ipv6/conf/%s", dev_name
);
4952 t
->sysctl_header
= register_net_sysctl(net
, path
, t
->addrconf_vars
);
4953 if (t
->sysctl_header
== NULL
)
4965 static void __addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
4967 struct addrconf_sysctl_table
*t
;
4969 if (p
->sysctl
== NULL
)
4974 unregister_net_sysctl_table(t
->sysctl_header
);
4978 static void addrconf_sysctl_register(struct inet6_dev
*idev
)
4980 neigh_sysctl_register(idev
->dev
, idev
->nd_parms
, "ipv6",
4981 &ndisc_ifinfo_sysctl_change
);
4982 __addrconf_sysctl_register(dev_net(idev
->dev
), idev
->dev
->name
,
4986 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
4988 __addrconf_sysctl_unregister(&idev
->cnf
);
4989 neigh_sysctl_unregister(idev
->nd_parms
);
4995 static int __net_init
addrconf_init_net(struct net
*net
)
4998 struct ipv6_devconf
*all
, *dflt
;
5000 all
= kmemdup(&ipv6_devconf
, sizeof(ipv6_devconf
), GFP_KERNEL
);
5004 dflt
= kmemdup(&ipv6_devconf_dflt
, sizeof(ipv6_devconf_dflt
), GFP_KERNEL
);
5006 goto err_alloc_dflt
;
5008 /* these will be inherited by all namespaces */
5009 dflt
->autoconf
= ipv6_defaults
.autoconf
;
5010 dflt
->disable_ipv6
= ipv6_defaults
.disable_ipv6
;
5012 net
->ipv6
.devconf_all
= all
;
5013 net
->ipv6
.devconf_dflt
= dflt
;
5015 #ifdef CONFIG_SYSCTL
5016 err
= __addrconf_sysctl_register(net
, "all", NULL
, all
);
5020 err
= __addrconf_sysctl_register(net
, "default", NULL
, dflt
);
5026 #ifdef CONFIG_SYSCTL
5028 __addrconf_sysctl_unregister(all
);
5038 static void __net_exit
addrconf_exit_net(struct net
*net
)
5040 #ifdef CONFIG_SYSCTL
5041 __addrconf_sysctl_unregister(net
->ipv6
.devconf_dflt
);
5042 __addrconf_sysctl_unregister(net
->ipv6
.devconf_all
);
5044 if (!net_eq(net
, &init_net
)) {
5045 kfree(net
->ipv6
.devconf_dflt
);
5046 kfree(net
->ipv6
.devconf_all
);
5050 static struct pernet_operations addrconf_ops
= {
5051 .init
= addrconf_init_net
,
5052 .exit
= addrconf_exit_net
,
5055 static struct rtnl_af_ops inet6_ops
= {
5057 .fill_link_af
= inet6_fill_link_af
,
5058 .get_link_af_size
= inet6_get_link_af_size
,
5059 .set_link_af
= inet6_set_link_af
,
5063 * Init / cleanup code
5066 int __init
addrconf_init(void)
5070 err
= ipv6_addr_label_init();
5072 pr_crit("%s: cannot initialize default policy table: %d\n",
5077 err
= register_pernet_subsys(&addrconf_ops
);
5081 /* The addrconf netdev notifier requires that loopback_dev
5082 * has it's ipv6 private information allocated and setup
5083 * before it can bring up and give link-local addresses
5084 * to other devices which are up.
5086 * Unfortunately, loopback_dev is not necessarily the first
5087 * entry in the global dev_base list of net devices. In fact,
5088 * it is likely to be the very last entry on that list.
5089 * So this causes the notifier registry below to try and
5090 * give link-local addresses to all devices besides loopback_dev
5091 * first, then loopback_dev, which cases all the non-loopback_dev
5092 * devices to fail to get a link-local address.
5094 * So, as a temporary fix, allocate the ipv6 structure for
5095 * loopback_dev first by hand.
5096 * Longer term, all of the dependencies ipv6 has upon the loopback
5097 * device and it being up should be removed.
5100 if (!ipv6_add_dev(init_net
.loopback_dev
))
5106 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
5107 INIT_HLIST_HEAD(&inet6_addr_lst
[i
]);
5109 register_netdevice_notifier(&ipv6_dev_notf
);
5113 err
= rtnl_af_register(&inet6_ops
);
5117 err
= __rtnl_register(PF_INET6
, RTM_GETLINK
, NULL
, inet6_dump_ifinfo
,
5122 /* Only the first call to __rtnl_register can fail */
5123 __rtnl_register(PF_INET6
, RTM_NEWADDR
, inet6_rtm_newaddr
, NULL
, NULL
);
5124 __rtnl_register(PF_INET6
, RTM_DELADDR
, inet6_rtm_deladdr
, NULL
, NULL
);
5125 __rtnl_register(PF_INET6
, RTM_GETADDR
, inet6_rtm_getaddr
,
5126 inet6_dump_ifaddr
, NULL
);
5127 __rtnl_register(PF_INET6
, RTM_GETMULTICAST
, NULL
,
5128 inet6_dump_ifmcaddr
, NULL
);
5129 __rtnl_register(PF_INET6
, RTM_GETANYCAST
, NULL
,
5130 inet6_dump_ifacaddr
, NULL
);
5131 __rtnl_register(PF_INET6
, RTM_GETNETCONF
, inet6_netconf_get_devconf
,
5132 inet6_netconf_dump_devconf
, NULL
);
5134 ipv6_addr_label_rtnl_register();
5138 rtnl_af_unregister(&inet6_ops
);
5140 unregister_netdevice_notifier(&ipv6_dev_notf
);
5142 unregister_pernet_subsys(&addrconf_ops
);
5144 ipv6_addr_label_cleanup();
5149 void addrconf_cleanup(void)
5151 struct net_device
*dev
;
5154 unregister_netdevice_notifier(&ipv6_dev_notf
);
5155 unregister_pernet_subsys(&addrconf_ops
);
5156 ipv6_addr_label_cleanup();
5160 __rtnl_af_unregister(&inet6_ops
);
5162 /* clean dev list */
5163 for_each_netdev(&init_net
, dev
) {
5164 if (__in6_dev_get(dev
) == NULL
)
5166 addrconf_ifdown(dev
, 1);
5168 addrconf_ifdown(init_net
.loopback_dev
, 2);
5173 spin_lock_bh(&addrconf_hash_lock
);
5174 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
5175 WARN_ON(!hlist_empty(&inet6_addr_lst
[i
]));
5176 spin_unlock_bh(&addrconf_hash_lock
);
5178 del_timer(&addr_chk_timer
);