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>
74 #include <net/protocol.h>
75 #include <net/ndisc.h>
76 #include <net/ip6_route.h>
77 #include <net/addrconf.h>
80 #include <net/netlink.h>
81 #include <net/pkt_sched.h>
82 #include <linux/if_tunnel.h>
83 #include <linux/rtnetlink.h>
84 #include <linux/netconf.h>
86 #ifdef CONFIG_IPV6_PRIVACY
87 #include <linux/random.h>
90 #include <linux/uaccess.h>
91 #include <asm/unaligned.h>
93 #include <linux/proc_fs.h>
94 #include <linux/seq_file.h>
95 #include <linux/export.h>
97 /* Set to 3 to get tracing... */
101 #define ADBG(x) printk x
106 #define INFINITY_LIFE_TIME 0xFFFFFFFF
108 static inline u32
cstamp_delta(unsigned long cstamp
)
110 return (cstamp
- INITIAL_JIFFIES
) * 100UL / HZ
;
113 #define ADDRCONF_TIMER_FUZZ_MINUS (HZ > 50 ? HZ/50 : 1)
114 #define ADDRCONF_TIMER_FUZZ (HZ / 4)
115 #define ADDRCONF_TIMER_FUZZ_MAX (HZ)
118 static void addrconf_sysctl_register(struct inet6_dev
*idev
);
119 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
);
121 static inline void addrconf_sysctl_register(struct inet6_dev
*idev
)
125 static inline void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
130 #ifdef CONFIG_IPV6_PRIVACY
131 static void __ipv6_regen_rndid(struct inet6_dev
*idev
);
132 static void __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
133 static void ipv6_regen_rndid(unsigned long data
);
136 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
);
137 static int ipv6_count_addresses(struct inet6_dev
*idev
);
140 * Configured unicast address hash table
142 static struct hlist_head inet6_addr_lst
[IN6_ADDR_HSIZE
];
143 static DEFINE_SPINLOCK(addrconf_hash_lock
);
145 static void addrconf_verify(unsigned long);
147 static DEFINE_TIMER(addr_chk_timer
, addrconf_verify
, 0, 0);
148 static DEFINE_SPINLOCK(addrconf_verify_lock
);
150 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
151 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
153 static void addrconf_type_change(struct net_device
*dev
,
154 unsigned long event
);
155 static int addrconf_ifdown(struct net_device
*dev
, int how
);
157 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
);
158 static void addrconf_dad_timer(unsigned long data
);
159 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
);
160 static void addrconf_dad_run(struct inet6_dev
*idev
);
161 static void addrconf_rs_timer(unsigned long data
);
162 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
163 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
165 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
166 struct prefix_info
*pinfo
);
167 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
168 struct net_device
*dev
);
170 static ATOMIC_NOTIFIER_HEAD(inet6addr_chain
);
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
;
247 /* Check if a valid qdisc is available */
248 static inline bool addrconf_qdisc_ok(const struct net_device
*dev
)
250 return !qdisc_tx_is_noop(dev
);
253 /* Check if a route is valid prefix route */
254 static inline int addrconf_is_prefix_route(const struct rt6_info
*rt
)
256 return (rt
->rt6i_flags
& (RTF_GATEWAY
| RTF_DEFAULT
)) == 0;
259 static void addrconf_del_timer(struct inet6_ifaddr
*ifp
)
261 if (del_timer(&ifp
->timer
))
265 enum addrconf_timer_t
{
271 static void addrconf_mod_timer(struct inet6_ifaddr
*ifp
,
272 enum addrconf_timer_t what
,
275 if (!del_timer(&ifp
->timer
))
280 ifp
->timer
.function
= addrconf_dad_timer
;
283 ifp
->timer
.function
= addrconf_rs_timer
;
288 ifp
->timer
.expires
= jiffies
+ when
;
289 add_timer(&ifp
->timer
);
292 static int snmp6_alloc_dev(struct inet6_dev
*idev
)
294 if (snmp_mib_init((void __percpu
**)idev
->stats
.ipv6
,
295 sizeof(struct ipstats_mib
),
296 __alignof__(struct ipstats_mib
)) < 0)
298 idev
->stats
.icmpv6dev
= kzalloc(sizeof(struct icmpv6_mib_device
),
300 if (!idev
->stats
.icmpv6dev
)
302 idev
->stats
.icmpv6msgdev
= kzalloc(sizeof(struct icmpv6msg_mib_device
),
304 if (!idev
->stats
.icmpv6msgdev
)
310 kfree(idev
->stats
.icmpv6dev
);
312 snmp_mib_free((void __percpu
**)idev
->stats
.ipv6
);
317 static void snmp6_free_dev(struct inet6_dev
*idev
)
319 kfree(idev
->stats
.icmpv6msgdev
);
320 kfree(idev
->stats
.icmpv6dev
);
321 snmp_mib_free((void __percpu
**)idev
->stats
.ipv6
);
324 /* Nobody refers to this device, we may destroy it. */
326 void in6_dev_finish_destroy(struct inet6_dev
*idev
)
328 struct net_device
*dev
= idev
->dev
;
330 WARN_ON(!list_empty(&idev
->addr_list
));
331 WARN_ON(idev
->mc_list
!= NULL
);
333 #ifdef NET_REFCNT_DEBUG
334 pr_debug("%s: %s\n", __func__
, dev
? dev
->name
: "NIL");
338 pr_warn("Freeing alive inet6 device %p\n", idev
);
341 snmp6_free_dev(idev
);
342 kfree_rcu(idev
, rcu
);
344 EXPORT_SYMBOL(in6_dev_finish_destroy
);
346 static struct inet6_dev
*ipv6_add_dev(struct net_device
*dev
)
348 struct inet6_dev
*ndev
;
352 if (dev
->mtu
< IPV6_MIN_MTU
)
355 ndev
= kzalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
360 rwlock_init(&ndev
->lock
);
362 INIT_LIST_HEAD(&ndev
->addr_list
);
364 memcpy(&ndev
->cnf
, dev_net(dev
)->ipv6
.devconf_dflt
, sizeof(ndev
->cnf
));
365 ndev
->cnf
.mtu6
= dev
->mtu
;
366 ndev
->cnf
.sysctl
= NULL
;
367 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
368 if (ndev
->nd_parms
== NULL
) {
372 if (ndev
->cnf
.forwarding
)
373 dev_disable_lro(dev
);
374 /* We refer to the device */
377 if (snmp6_alloc_dev(ndev
) < 0) {
379 "%s: cannot allocate memory for statistics; dev=%s.\n",
380 __func__
, dev
->name
));
381 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
387 if (snmp6_register_dev(ndev
) < 0) {
389 "%s: cannot create /proc/net/dev_snmp6/%s\n",
390 __func__
, dev
->name
));
391 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
393 in6_dev_finish_destroy(ndev
);
397 /* One reference from device. We must do this before
398 * we invoke __ipv6_regen_rndid().
402 if (dev
->flags
& (IFF_NOARP
| IFF_LOOPBACK
))
403 ndev
->cnf
.accept_dad
= -1;
405 #if IS_ENABLED(CONFIG_IPV6_SIT)
406 if (dev
->type
== ARPHRD_SIT
&& (dev
->priv_flags
& IFF_ISATAP
)) {
407 pr_info("%s: Disabled Multicast RS\n", dev
->name
);
408 ndev
->cnf
.rtr_solicits
= 0;
412 #ifdef CONFIG_IPV6_PRIVACY
413 INIT_LIST_HEAD(&ndev
->tempaddr_list
);
414 setup_timer(&ndev
->regen_timer
, ipv6_regen_rndid
, (unsigned long)ndev
);
415 if ((dev
->flags
&IFF_LOOPBACK
) ||
416 dev
->type
== ARPHRD_TUNNEL
||
417 dev
->type
== ARPHRD_TUNNEL6
||
418 dev
->type
== ARPHRD_SIT
||
419 dev
->type
== ARPHRD_NONE
) {
420 ndev
->cnf
.use_tempaddr
= -1;
423 ipv6_regen_rndid((unsigned long) ndev
);
427 if (netif_running(dev
) && addrconf_qdisc_ok(dev
))
428 ndev
->if_flags
|= IF_READY
;
430 ipv6_mc_init_dev(ndev
);
431 ndev
->tstamp
= jiffies
;
432 addrconf_sysctl_register(ndev
);
433 /* protected by rtnl_lock */
434 rcu_assign_pointer(dev
->ip6_ptr
, ndev
);
436 /* Join all-node multicast group */
437 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allnodes
);
439 /* Join all-router multicast group if forwarding is set */
440 if (ndev
->cnf
.forwarding
&& (dev
->flags
& IFF_MULTICAST
))
441 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
446 static struct inet6_dev
*ipv6_find_idev(struct net_device
*dev
)
448 struct inet6_dev
*idev
;
452 idev
= __in6_dev_get(dev
);
454 idev
= ipv6_add_dev(dev
);
459 if (dev
->flags
&IFF_UP
)
464 static int inet6_netconf_msgsize_devconf(int type
)
466 int size
= NLMSG_ALIGN(sizeof(struct netconfmsg
))
467 + nla_total_size(4); /* NETCONFA_IFINDEX */
469 /* type -1 is used for ALL */
470 if (type
== -1 || type
== NETCONFA_FORWARDING
)
471 size
+= nla_total_size(4);
476 static int inet6_netconf_fill_devconf(struct sk_buff
*skb
, int ifindex
,
477 struct ipv6_devconf
*devconf
, u32 portid
,
478 u32 seq
, int event
, unsigned int flags
,
481 struct nlmsghdr
*nlh
;
482 struct netconfmsg
*ncm
;
484 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct netconfmsg
),
489 ncm
= nlmsg_data(nlh
);
490 ncm
->ncm_family
= AF_INET6
;
492 if (nla_put_s32(skb
, NETCONFA_IFINDEX
, ifindex
) < 0)
493 goto nla_put_failure
;
495 /* type -1 is used for ALL */
496 if ((type
== -1 || type
== NETCONFA_FORWARDING
) &&
497 nla_put_s32(skb
, NETCONFA_FORWARDING
, devconf
->forwarding
) < 0)
498 goto nla_put_failure
;
500 return nlmsg_end(skb
, nlh
);
503 nlmsg_cancel(skb
, nlh
);
507 static void inet6_netconf_notify_devconf(struct net
*net
, int type
, int ifindex
,
508 struct ipv6_devconf
*devconf
)
513 skb
= nlmsg_new(inet6_netconf_msgsize_devconf(type
), GFP_ATOMIC
);
517 err
= inet6_netconf_fill_devconf(skb
, ifindex
, devconf
, 0, 0,
518 RTM_NEWNETCONF
, 0, type
);
520 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
521 WARN_ON(err
== -EMSGSIZE
);
525 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_NETCONF
, NULL
, GFP_ATOMIC
);
529 rtnl_set_sk_err(net
, RTNLGRP_IPV6_NETCONF
, err
);
532 static const struct nla_policy devconf_ipv6_policy
[NETCONFA_MAX
+1] = {
533 [NETCONFA_IFINDEX
] = { .len
= sizeof(int) },
534 [NETCONFA_FORWARDING
] = { .len
= sizeof(int) },
537 static int inet6_netconf_get_devconf(struct sk_buff
*in_skb
,
538 struct nlmsghdr
*nlh
,
541 struct net
*net
= sock_net(in_skb
->sk
);
542 struct nlattr
*tb
[NETCONFA_MAX
+1];
543 struct netconfmsg
*ncm
;
545 struct ipv6_devconf
*devconf
;
546 struct inet6_dev
*in6_dev
;
547 struct net_device
*dev
;
551 err
= nlmsg_parse(nlh
, sizeof(*ncm
), tb
, NETCONFA_MAX
,
552 devconf_ipv6_policy
);
557 if (!tb
[NETCONFA_IFINDEX
])
560 ifindex
= nla_get_s32(tb
[NETCONFA_IFINDEX
]);
562 case NETCONFA_IFINDEX_ALL
:
563 devconf
= net
->ipv6
.devconf_all
;
565 case NETCONFA_IFINDEX_DEFAULT
:
566 devconf
= net
->ipv6
.devconf_dflt
;
569 dev
= __dev_get_by_index(net
, ifindex
);
572 in6_dev
= __in6_dev_get(dev
);
575 devconf
= &in6_dev
->cnf
;
580 skb
= nlmsg_new(inet6_netconf_msgsize_devconf(-1), GFP_ATOMIC
);
584 err
= inet6_netconf_fill_devconf(skb
, ifindex
, devconf
,
585 NETLINK_CB(in_skb
).portid
,
586 nlh
->nlmsg_seq
, RTM_NEWNETCONF
, 0,
589 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
590 WARN_ON(err
== -EMSGSIZE
);
594 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).portid
);
600 static void dev_forward_change(struct inet6_dev
*idev
)
602 struct net_device
*dev
;
603 struct inet6_ifaddr
*ifa
;
608 if (idev
->cnf
.forwarding
)
609 dev_disable_lro(dev
);
610 if (dev
->flags
& IFF_MULTICAST
) {
611 if (idev
->cnf
.forwarding
)
612 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
614 ipv6_dev_mc_dec(dev
, &in6addr_linklocal_allrouters
);
617 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
618 if (ifa
->flags
&IFA_F_TENTATIVE
)
620 if (idev
->cnf
.forwarding
)
621 addrconf_join_anycast(ifa
);
623 addrconf_leave_anycast(ifa
);
625 inet6_netconf_notify_devconf(dev_net(dev
), NETCONFA_FORWARDING
,
626 dev
->ifindex
, &idev
->cnf
);
630 static void addrconf_forward_change(struct net
*net
, __s32 newf
)
632 struct net_device
*dev
;
633 struct inet6_dev
*idev
;
635 for_each_netdev(net
, dev
) {
636 idev
= __in6_dev_get(dev
);
638 int changed
= (!idev
->cnf
.forwarding
) ^ (!newf
);
639 idev
->cnf
.forwarding
= newf
;
641 dev_forward_change(idev
);
646 static int addrconf_fixup_forwarding(struct ctl_table
*table
, int *p
, int newf
)
652 return restart_syscall();
654 net
= (struct net
*)table
->extra2
;
658 if (p
== &net
->ipv6
.devconf_dflt
->forwarding
) {
659 if ((!newf
) ^ (!old
))
660 inet6_netconf_notify_devconf(net
, NETCONFA_FORWARDING
,
661 NETCONFA_IFINDEX_DEFAULT
,
662 net
->ipv6
.devconf_dflt
);
667 if (p
== &net
->ipv6
.devconf_all
->forwarding
) {
668 net
->ipv6
.devconf_dflt
->forwarding
= newf
;
669 addrconf_forward_change(net
, newf
);
670 if ((!newf
) ^ (!old
))
671 inet6_netconf_notify_devconf(net
, NETCONFA_FORWARDING
,
672 NETCONFA_IFINDEX_ALL
,
673 net
->ipv6
.devconf_all
);
674 } else if ((!newf
) ^ (!old
))
675 dev_forward_change((struct inet6_dev
*)table
->extra1
);
679 rt6_purge_dflt_routers(net
);
684 /* Nobody refers to this ifaddr, destroy it */
685 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
687 WARN_ON(!hlist_unhashed(&ifp
->addr_lst
));
689 #ifdef NET_REFCNT_DEBUG
690 pr_debug("%s\n", __func__
);
693 in6_dev_put(ifp
->idev
);
695 if (del_timer(&ifp
->timer
))
696 pr_notice("Timer is still running, when freeing ifa=%p\n", ifp
);
698 if (ifp
->state
!= INET6_IFADDR_STATE_DEAD
) {
699 pr_warn("Freeing alive inet6 address %p\n", ifp
);
708 ipv6_link_dev_addr(struct inet6_dev
*idev
, struct inet6_ifaddr
*ifp
)
711 int ifp_scope
= ipv6_addr_src_scope(&ifp
->addr
);
714 * Each device address list is sorted in order of scope -
715 * global before linklocal.
717 list_for_each(p
, &idev
->addr_list
) {
718 struct inet6_ifaddr
*ifa
719 = list_entry(p
, struct inet6_ifaddr
, if_list
);
720 if (ifp_scope
>= ipv6_addr_src_scope(&ifa
->addr
))
724 list_add_tail(&ifp
->if_list
, p
);
727 static u32
inet6_addr_hash(const struct in6_addr
*addr
)
729 return hash_32(ipv6_addr_hash(addr
), IN6_ADDR_HSIZE_SHIFT
);
732 /* On success it returns ifp with increased reference count */
734 static struct inet6_ifaddr
*
735 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
, int pfxlen
,
736 int scope
, u32 flags
)
738 struct inet6_ifaddr
*ifa
= NULL
;
742 int addr_type
= ipv6_addr_type(addr
);
744 if (addr_type
== IPV6_ADDR_ANY
||
745 addr_type
& IPV6_ADDR_MULTICAST
||
746 (!(idev
->dev
->flags
& IFF_LOOPBACK
) &&
747 addr_type
& IPV6_ADDR_LOOPBACK
))
748 return ERR_PTR(-EADDRNOTAVAIL
);
752 err
= -ENODEV
; /*XXX*/
756 if (idev
->cnf
.disable_ipv6
) {
761 spin_lock(&addrconf_hash_lock
);
763 /* Ignore adding duplicate addresses on an interface */
764 if (ipv6_chk_same_addr(dev_net(idev
->dev
), addr
, idev
->dev
)) {
765 ADBG(("ipv6_add_addr: already assigned\n"));
770 ifa
= kzalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
773 ADBG(("ipv6_add_addr: malloc failed\n"));
778 rt
= addrconf_dst_alloc(idev
, addr
, false);
786 spin_lock_init(&ifa
->lock
);
787 spin_lock_init(&ifa
->state_lock
);
788 init_timer(&ifa
->timer
);
789 INIT_HLIST_NODE(&ifa
->addr_lst
);
790 ifa
->timer
.data
= (unsigned long) ifa
;
792 ifa
->prefix_len
= pfxlen
;
793 ifa
->flags
= flags
| IFA_F_TENTATIVE
;
794 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
803 /* Add to big hash table */
804 hash
= inet6_addr_hash(addr
);
806 hlist_add_head_rcu(&ifa
->addr_lst
, &inet6_addr_lst
[hash
]);
807 spin_unlock(&addrconf_hash_lock
);
809 write_lock(&idev
->lock
);
810 /* Add to inet6_dev unicast addr list. */
811 ipv6_link_dev_addr(idev
, ifa
);
813 #ifdef CONFIG_IPV6_PRIVACY
814 if (ifa
->flags
&IFA_F_TEMPORARY
) {
815 list_add(&ifa
->tmp_list
, &idev
->tempaddr_list
);
821 write_unlock(&idev
->lock
);
823 rcu_read_unlock_bh();
825 if (likely(err
== 0))
826 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_UP
, ifa
);
834 spin_unlock(&addrconf_hash_lock
);
838 /* This function wants to get referenced ifp and releases it before return */
840 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
842 struct inet6_ifaddr
*ifa
, *ifn
;
843 struct inet6_dev
*idev
= ifp
->idev
;
845 int deleted
= 0, onlink
= 0;
846 unsigned long expires
= jiffies
;
848 spin_lock_bh(&ifp
->state_lock
);
850 ifp
->state
= INET6_IFADDR_STATE_DEAD
;
851 spin_unlock_bh(&ifp
->state_lock
);
853 if (state
== INET6_IFADDR_STATE_DEAD
)
856 spin_lock_bh(&addrconf_hash_lock
);
857 hlist_del_init_rcu(&ifp
->addr_lst
);
858 spin_unlock_bh(&addrconf_hash_lock
);
860 write_lock_bh(&idev
->lock
);
861 #ifdef CONFIG_IPV6_PRIVACY
862 if (ifp
->flags
&IFA_F_TEMPORARY
) {
863 list_del(&ifp
->tmp_list
);
865 in6_ifa_put(ifp
->ifpub
);
872 list_for_each_entry_safe(ifa
, ifn
, &idev
->addr_list
, if_list
) {
874 list_del_init(&ifp
->if_list
);
877 if (!(ifp
->flags
& IFA_F_PERMANENT
) || onlink
> 0)
881 } else if (ifp
->flags
& IFA_F_PERMANENT
) {
882 if (ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
884 if (ifa
->flags
& IFA_F_PERMANENT
) {
889 unsigned long lifetime
;
894 spin_lock(&ifa
->lock
);
896 lifetime
= addrconf_timeout_fixup(ifa
->valid_lft
, HZ
);
898 * Note: Because this address is
899 * not permanent, lifetime <
900 * LONG_MAX / HZ here.
902 if (time_before(expires
,
903 ifa
->tstamp
+ lifetime
* HZ
))
904 expires
= ifa
->tstamp
+ lifetime
* HZ
;
905 spin_unlock(&ifa
->lock
);
910 write_unlock_bh(&idev
->lock
);
912 addrconf_del_timer(ifp
);
914 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
916 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifp
);
919 * Purge or update corresponding prefix
921 * 1) we don't purge prefix here if address was not permanent.
922 * prefix is managed by its own lifetime.
923 * 2) if there're no addresses, delete prefix.
924 * 3) if there're still other permanent address(es),
925 * corresponding prefix is still permanent.
926 * 4) otherwise, update prefix lifetime to the
927 * longest valid lifetime among the corresponding
928 * addresses on the device.
929 * Note: subsequent RA will update lifetime.
933 if ((ifp
->flags
& IFA_F_PERMANENT
) && onlink
< 1) {
934 struct in6_addr prefix
;
936 struct net
*net
= dev_net(ifp
->idev
->dev
);
937 struct flowi6 fl6
= {};
939 ipv6_addr_prefix(&prefix
, &ifp
->addr
, ifp
->prefix_len
);
940 fl6
.flowi6_oif
= ifp
->idev
->dev
->ifindex
;
942 rt
= (struct rt6_info
*)ip6_route_lookup(net
, &fl6
,
945 if (rt
!= net
->ipv6
.ip6_null_entry
&&
946 addrconf_is_prefix_route(rt
)) {
950 } else if (!(rt
->rt6i_flags
& RTF_EXPIRES
)) {
951 rt6_set_expires(rt
, expires
);
957 /* clean up prefsrc entries */
958 rt6_remove_prefsrc(ifp
);
963 #ifdef CONFIG_IPV6_PRIVACY
964 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
966 struct inet6_dev
*idev
= ifp
->idev
;
967 struct in6_addr addr
, *tmpaddr
;
968 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_tstamp
, age
;
969 unsigned long regen_advance
;
974 unsigned long now
= jiffies
;
976 write_lock(&idev
->lock
);
978 spin_lock_bh(&ift
->lock
);
979 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
980 spin_unlock_bh(&ift
->lock
);
987 if (idev
->cnf
.use_tempaddr
<= 0) {
988 write_unlock(&idev
->lock
);
989 pr_info("%s: use_tempaddr is disabled\n", __func__
);
994 spin_lock_bh(&ifp
->lock
);
995 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
996 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
997 spin_unlock_bh(&ifp
->lock
);
998 write_unlock(&idev
->lock
);
999 pr_warn("%s: regeneration time exceeded - disabled temporary address support\n",
1006 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
1007 __ipv6_try_regen_rndid(idev
, tmpaddr
);
1008 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
1009 age
= (now
- ifp
->tstamp
) / HZ
;
1010 tmp_valid_lft
= min_t(__u32
,
1012 idev
->cnf
.temp_valid_lft
+ age
);
1013 tmp_prefered_lft
= min_t(__u32
,
1015 idev
->cnf
.temp_prefered_lft
+ age
-
1016 idev
->cnf
.max_desync_factor
);
1017 tmp_plen
= ifp
->prefix_len
;
1018 max_addresses
= idev
->cnf
.max_addresses
;
1019 tmp_tstamp
= ifp
->tstamp
;
1020 spin_unlock_bh(&ifp
->lock
);
1022 regen_advance
= idev
->cnf
.regen_max_retry
*
1023 idev
->cnf
.dad_transmits
*
1024 idev
->nd_parms
->retrans_time
/ HZ
;
1025 write_unlock(&idev
->lock
);
1027 /* A temporary address is created only if this calculated Preferred
1028 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
1029 * an implementation must not create a temporary address with a zero
1030 * Preferred Lifetime.
1032 if (tmp_prefered_lft
<= regen_advance
) {
1039 addr_flags
= IFA_F_TEMPORARY
;
1040 /* set in addrconf_prefix_rcv() */
1041 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
1042 addr_flags
|= IFA_F_OPTIMISTIC
;
1044 ift
= !max_addresses
||
1045 ipv6_count_addresses(idev
) < max_addresses
?
1046 ipv6_add_addr(idev
, &addr
, tmp_plen
,
1047 ipv6_addr_type(&addr
)&IPV6_ADDR_SCOPE_MASK
,
1049 if (!ift
|| IS_ERR(ift
)) {
1052 pr_info("%s: retry temporary address regeneration\n", __func__
);
1054 write_lock(&idev
->lock
);
1058 spin_lock_bh(&ift
->lock
);
1060 ift
->valid_lft
= tmp_valid_lft
;
1061 ift
->prefered_lft
= tmp_prefered_lft
;
1063 ift
->tstamp
= tmp_tstamp
;
1064 spin_unlock_bh(&ift
->lock
);
1066 addrconf_dad_start(ift
);
1075 * Choose an appropriate source address (RFC3484)
1078 IPV6_SADDR_RULE_INIT
= 0,
1079 IPV6_SADDR_RULE_LOCAL
,
1080 IPV6_SADDR_RULE_SCOPE
,
1081 IPV6_SADDR_RULE_PREFERRED
,
1082 #ifdef CONFIG_IPV6_MIP6
1083 IPV6_SADDR_RULE_HOA
,
1085 IPV6_SADDR_RULE_OIF
,
1086 IPV6_SADDR_RULE_LABEL
,
1087 #ifdef CONFIG_IPV6_PRIVACY
1088 IPV6_SADDR_RULE_PRIVACY
,
1090 IPV6_SADDR_RULE_ORCHID
,
1091 IPV6_SADDR_RULE_PREFIX
,
1095 struct ipv6_saddr_score
{
1098 struct inet6_ifaddr
*ifa
;
1099 DECLARE_BITMAP(scorebits
, IPV6_SADDR_RULE_MAX
);
1104 struct ipv6_saddr_dst
{
1105 const struct in6_addr
*addr
;
1112 static inline int ipv6_saddr_preferred(int type
)
1114 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|IPV6_ADDR_LOOPBACK
))
1119 static int ipv6_get_saddr_eval(struct net
*net
,
1120 struct ipv6_saddr_score
*score
,
1121 struct ipv6_saddr_dst
*dst
,
1126 if (i
<= score
->rule
) {
1128 case IPV6_SADDR_RULE_SCOPE
:
1129 ret
= score
->scopedist
;
1131 case IPV6_SADDR_RULE_PREFIX
:
1132 ret
= score
->matchlen
;
1135 ret
= !!test_bit(i
, score
->scorebits
);
1141 case IPV6_SADDR_RULE_INIT
:
1142 /* Rule 0: remember if hiscore is not ready yet */
1145 case IPV6_SADDR_RULE_LOCAL
:
1146 /* Rule 1: Prefer same address */
1147 ret
= ipv6_addr_equal(&score
->ifa
->addr
, dst
->addr
);
1149 case IPV6_SADDR_RULE_SCOPE
:
1150 /* Rule 2: Prefer appropriate scope
1155 * ---+--+-+---> scope
1157 * | d is scope of the destination.
1159 * | \ <- smaller scope is better if
1160 * B-15 | \ if scope is enough for destinaion.
1161 * | ret = B - scope (-1 <= scope >= d <= 15).
1163 * |/ <- greater is better
1164 * -C / if scope is not enough for destination.
1165 * /| ret = scope - C (-1 <= d < scope <= 15).
1167 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1168 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1169 * Assume B = 0 and we get C > 29.
1171 ret
= __ipv6_addr_src_scope(score
->addr_type
);
1172 if (ret
>= dst
->scope
)
1175 ret
-= 128; /* 30 is enough */
1176 score
->scopedist
= ret
;
1178 case IPV6_SADDR_RULE_PREFERRED
:
1179 /* Rule 3: Avoid deprecated and optimistic addresses */
1180 ret
= ipv6_saddr_preferred(score
->addr_type
) ||
1181 !(score
->ifa
->flags
& (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
));
1183 #ifdef CONFIG_IPV6_MIP6
1184 case IPV6_SADDR_RULE_HOA
:
1186 /* Rule 4: Prefer home address */
1187 int prefhome
= !(dst
->prefs
& IPV6_PREFER_SRC_COA
);
1188 ret
= !(score
->ifa
->flags
& IFA_F_HOMEADDRESS
) ^ prefhome
;
1192 case IPV6_SADDR_RULE_OIF
:
1193 /* Rule 5: Prefer outgoing interface */
1194 ret
= (!dst
->ifindex
||
1195 dst
->ifindex
== score
->ifa
->idev
->dev
->ifindex
);
1197 case IPV6_SADDR_RULE_LABEL
:
1198 /* Rule 6: Prefer matching label */
1199 ret
= ipv6_addr_label(net
,
1200 &score
->ifa
->addr
, score
->addr_type
,
1201 score
->ifa
->idev
->dev
->ifindex
) == dst
->label
;
1203 #ifdef CONFIG_IPV6_PRIVACY
1204 case IPV6_SADDR_RULE_PRIVACY
:
1206 /* Rule 7: Prefer public address
1207 * Note: prefer temporary address if use_tempaddr >= 2
1209 int preftmp
= dst
->prefs
& (IPV6_PREFER_SRC_PUBLIC
|IPV6_PREFER_SRC_TMP
) ?
1210 !!(dst
->prefs
& IPV6_PREFER_SRC_TMP
) :
1211 score
->ifa
->idev
->cnf
.use_tempaddr
>= 2;
1212 ret
= (!(score
->ifa
->flags
& IFA_F_TEMPORARY
)) ^ preftmp
;
1216 case IPV6_SADDR_RULE_ORCHID
:
1217 /* Rule 8-: Prefer ORCHID vs ORCHID or
1218 * non-ORCHID vs non-ORCHID
1220 ret
= !(ipv6_addr_orchid(&score
->ifa
->addr
) ^
1221 ipv6_addr_orchid(dst
->addr
));
1223 case IPV6_SADDR_RULE_PREFIX
:
1224 /* Rule 8: Use longest matching prefix */
1225 ret
= ipv6_addr_diff(&score
->ifa
->addr
, dst
->addr
);
1226 if (ret
> score
->ifa
->prefix_len
)
1227 ret
= score
->ifa
->prefix_len
;
1228 score
->matchlen
= ret
;
1235 __set_bit(i
, score
->scorebits
);
1241 int ipv6_dev_get_saddr(struct net
*net
, const struct net_device
*dst_dev
,
1242 const struct in6_addr
*daddr
, unsigned int prefs
,
1243 struct in6_addr
*saddr
)
1245 struct ipv6_saddr_score scores
[2],
1246 *score
= &scores
[0], *hiscore
= &scores
[1];
1247 struct ipv6_saddr_dst dst
;
1248 struct net_device
*dev
;
1251 dst_type
= __ipv6_addr_type(daddr
);
1253 dst
.ifindex
= dst_dev
? dst_dev
->ifindex
: 0;
1254 dst
.scope
= __ipv6_addr_src_scope(dst_type
);
1255 dst
.label
= ipv6_addr_label(net
, daddr
, dst_type
, dst
.ifindex
);
1259 hiscore
->ifa
= NULL
;
1263 for_each_netdev_rcu(net
, dev
) {
1264 struct inet6_dev
*idev
;
1266 /* Candidate Source Address (section 4)
1267 * - multicast and link-local destination address,
1268 * the set of candidate source address MUST only
1269 * include addresses assigned to interfaces
1270 * belonging to the same link as the outgoing
1272 * (- For site-local destination addresses, the
1273 * set of candidate source addresses MUST only
1274 * include addresses assigned to interfaces
1275 * belonging to the same site as the outgoing
1278 if (((dst_type
& IPV6_ADDR_MULTICAST
) ||
1279 dst
.scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
) &&
1280 dst
.ifindex
&& dev
->ifindex
!= dst
.ifindex
)
1283 idev
= __in6_dev_get(dev
);
1287 read_lock_bh(&idev
->lock
);
1288 list_for_each_entry(score
->ifa
, &idev
->addr_list
, if_list
) {
1292 * - Tentative Address (RFC2462 section 5.4)
1293 * - A tentative address is not considered
1294 * "assigned to an interface" in the traditional
1295 * sense, unless it is also flagged as optimistic.
1296 * - Candidate Source Address (section 4)
1297 * - In any case, anycast addresses, multicast
1298 * addresses, and the unspecified address MUST
1299 * NOT be included in a candidate set.
1301 if ((score
->ifa
->flags
& IFA_F_TENTATIVE
) &&
1302 (!(score
->ifa
->flags
& IFA_F_OPTIMISTIC
)))
1305 score
->addr_type
= __ipv6_addr_type(&score
->ifa
->addr
);
1307 if (unlikely(score
->addr_type
== IPV6_ADDR_ANY
||
1308 score
->addr_type
& IPV6_ADDR_MULTICAST
)) {
1309 LIMIT_NETDEBUG(KERN_DEBUG
1310 "ADDRCONF: unspecified / multicast address "
1311 "assigned as unicast address on %s",
1317 bitmap_zero(score
->scorebits
, IPV6_SADDR_RULE_MAX
);
1319 for (i
= 0; i
< IPV6_SADDR_RULE_MAX
; i
++) {
1320 int minihiscore
, miniscore
;
1322 minihiscore
= ipv6_get_saddr_eval(net
, hiscore
, &dst
, i
);
1323 miniscore
= ipv6_get_saddr_eval(net
, score
, &dst
, i
);
1325 if (minihiscore
> miniscore
) {
1326 if (i
== IPV6_SADDR_RULE_SCOPE
&&
1327 score
->scopedist
> 0) {
1330 * each remaining entry
1331 * has too small (not enough)
1332 * scope, because ifa entries
1333 * are sorted by their scope
1339 } else if (minihiscore
< miniscore
) {
1341 in6_ifa_put(hiscore
->ifa
);
1343 in6_ifa_hold(score
->ifa
);
1345 swap(hiscore
, score
);
1347 /* restore our iterator */
1348 score
->ifa
= hiscore
->ifa
;
1355 read_unlock_bh(&idev
->lock
);
1360 return -EADDRNOTAVAIL
;
1362 *saddr
= hiscore
->ifa
->addr
;
1363 in6_ifa_put(hiscore
->ifa
);
1366 EXPORT_SYMBOL(ipv6_dev_get_saddr
);
1368 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1369 unsigned char banned_flags
)
1371 struct inet6_dev
*idev
;
1372 int err
= -EADDRNOTAVAIL
;
1375 idev
= __in6_dev_get(dev
);
1377 struct inet6_ifaddr
*ifp
;
1379 read_lock_bh(&idev
->lock
);
1380 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
1381 if (ifp
->scope
== IFA_LINK
&&
1382 !(ifp
->flags
& banned_flags
)) {
1388 read_unlock_bh(&idev
->lock
);
1394 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1397 struct inet6_ifaddr
*ifp
;
1399 read_lock_bh(&idev
->lock
);
1400 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
)
1402 read_unlock_bh(&idev
->lock
);
1406 int ipv6_chk_addr(struct net
*net
, const struct in6_addr
*addr
,
1407 struct net_device
*dev
, int strict
)
1409 struct inet6_ifaddr
*ifp
;
1410 struct hlist_node
*node
;
1411 unsigned int hash
= inet6_addr_hash(addr
);
1414 hlist_for_each_entry_rcu(ifp
, node
, &inet6_addr_lst
[hash
], addr_lst
) {
1415 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1417 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1418 !(ifp
->flags
&IFA_F_TENTATIVE
) &&
1419 (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1420 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))) {
1421 rcu_read_unlock_bh();
1426 rcu_read_unlock_bh();
1429 EXPORT_SYMBOL(ipv6_chk_addr
);
1431 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
1432 struct net_device
*dev
)
1434 unsigned int hash
= inet6_addr_hash(addr
);
1435 struct inet6_ifaddr
*ifp
;
1436 struct hlist_node
*node
;
1438 hlist_for_each_entry(ifp
, node
, &inet6_addr_lst
[hash
], addr_lst
) {
1439 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1441 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1442 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1449 int ipv6_chk_prefix(const struct in6_addr
*addr
, struct net_device
*dev
)
1451 struct inet6_dev
*idev
;
1452 struct inet6_ifaddr
*ifa
;
1457 idev
= __in6_dev_get(dev
);
1459 read_lock_bh(&idev
->lock
);
1460 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
1461 onlink
= ipv6_prefix_equal(addr
, &ifa
->addr
,
1466 read_unlock_bh(&idev
->lock
);
1471 EXPORT_SYMBOL(ipv6_chk_prefix
);
1473 struct inet6_ifaddr
*ipv6_get_ifaddr(struct net
*net
, const struct in6_addr
*addr
,
1474 struct net_device
*dev
, int strict
)
1476 struct inet6_ifaddr
*ifp
, *result
= NULL
;
1477 unsigned int hash
= inet6_addr_hash(addr
);
1478 struct hlist_node
*node
;
1481 hlist_for_each_entry_rcu_bh(ifp
, node
, &inet6_addr_lst
[hash
], addr_lst
) {
1482 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1484 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1485 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1486 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1493 rcu_read_unlock_bh();
1498 /* Gets referenced address, destroys ifaddr */
1500 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
, int dad_failed
)
1502 if (ifp
->flags
&IFA_F_PERMANENT
) {
1503 spin_lock_bh(&ifp
->lock
);
1504 addrconf_del_timer(ifp
);
1505 ifp
->flags
|= IFA_F_TENTATIVE
;
1507 ifp
->flags
|= IFA_F_DADFAILED
;
1508 spin_unlock_bh(&ifp
->lock
);
1510 ipv6_ifa_notify(0, ifp
);
1512 #ifdef CONFIG_IPV6_PRIVACY
1513 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1514 struct inet6_ifaddr
*ifpub
;
1515 spin_lock_bh(&ifp
->lock
);
1518 in6_ifa_hold(ifpub
);
1519 spin_unlock_bh(&ifp
->lock
);
1520 ipv6_create_tempaddr(ifpub
, ifp
);
1523 spin_unlock_bh(&ifp
->lock
);
1531 static int addrconf_dad_end(struct inet6_ifaddr
*ifp
)
1535 spin_lock(&ifp
->state_lock
);
1536 if (ifp
->state
== INET6_IFADDR_STATE_DAD
) {
1537 ifp
->state
= INET6_IFADDR_STATE_POSTDAD
;
1540 spin_unlock(&ifp
->state_lock
);
1545 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1547 struct inet6_dev
*idev
= ifp
->idev
;
1549 if (addrconf_dad_end(ifp
)) {
1554 net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n",
1555 ifp
->idev
->dev
->name
, &ifp
->addr
);
1557 if (idev
->cnf
.accept_dad
> 1 && !idev
->cnf
.disable_ipv6
) {
1558 struct in6_addr addr
;
1560 addr
.s6_addr32
[0] = htonl(0xfe800000);
1561 addr
.s6_addr32
[1] = 0;
1563 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) &&
1564 ipv6_addr_equal(&ifp
->addr
, &addr
)) {
1565 /* DAD failed for link-local based on MAC address */
1566 idev
->cnf
.disable_ipv6
= 1;
1568 pr_info("%s: IPv6 being disabled!\n",
1569 ifp
->idev
->dev
->name
);
1573 addrconf_dad_stop(ifp
, 1);
1576 /* Join to solicited addr multicast group. */
1578 void addrconf_join_solict(struct net_device
*dev
, const struct in6_addr
*addr
)
1580 struct in6_addr maddr
;
1582 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1585 addrconf_addr_solict_mult(addr
, &maddr
);
1586 ipv6_dev_mc_inc(dev
, &maddr
);
1589 void addrconf_leave_solict(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
1591 struct in6_addr maddr
;
1593 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1596 addrconf_addr_solict_mult(addr
, &maddr
);
1597 __ipv6_dev_mc_dec(idev
, &maddr
);
1600 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1602 struct in6_addr addr
;
1603 if (ifp
->prefix_len
== 127) /* RFC 6164 */
1605 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1606 if (ipv6_addr_any(&addr
))
1608 ipv6_dev_ac_inc(ifp
->idev
->dev
, &addr
);
1611 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1613 struct in6_addr addr
;
1614 if (ifp
->prefix_len
== 127) /* RFC 6164 */
1616 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1617 if (ipv6_addr_any(&addr
))
1619 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1622 static int addrconf_ifid_eui48(u8
*eui
, struct net_device
*dev
)
1624 if (dev
->addr_len
!= ETH_ALEN
)
1626 memcpy(eui
, dev
->dev_addr
, 3);
1627 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1630 * The zSeries OSA network cards can be shared among various
1631 * OS instances, but the OSA cards have only one MAC address.
1632 * This leads to duplicate address conflicts in conjunction
1633 * with IPv6 if more than one instance uses the same card.
1635 * The driver for these cards can deliver a unique 16-bit
1636 * identifier for each instance sharing the same card. It is
1637 * placed instead of 0xFFFE in the interface identifier. The
1638 * "u" bit of the interface identifier is not inverted in this
1639 * case. Hence the resulting interface identifier has local
1640 * scope according to RFC2373.
1643 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1644 eui
[4] = dev
->dev_id
& 0xFF;
1653 static int addrconf_ifid_eui64(u8
*eui
, struct net_device
*dev
)
1655 if (dev
->addr_len
!= IEEE802154_ADDR_LEN
)
1657 memcpy(eui
, dev
->dev_addr
, 8);
1661 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
1663 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1664 if (dev
->addr_len
!= ARCNET_ALEN
)
1667 eui
[7] = *(u8
*)dev
->dev_addr
;
1671 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
1673 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1675 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1680 static int __ipv6_isatap_ifid(u8
*eui
, __be32 addr
)
1684 eui
[0] = (ipv4_is_zeronet(addr
) || ipv4_is_private_10(addr
) ||
1685 ipv4_is_loopback(addr
) || ipv4_is_linklocal_169(addr
) ||
1686 ipv4_is_private_172(addr
) || ipv4_is_test_192(addr
) ||
1687 ipv4_is_anycast_6to4(addr
) || ipv4_is_private_192(addr
) ||
1688 ipv4_is_test_198(addr
) || ipv4_is_multicast(addr
) ||
1689 ipv4_is_lbcast(addr
)) ? 0x00 : 0x02;
1693 memcpy(eui
+ 4, &addr
, 4);
1697 static int addrconf_ifid_sit(u8
*eui
, struct net_device
*dev
)
1699 if (dev
->priv_flags
& IFF_ISATAP
)
1700 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
1704 static int addrconf_ifid_gre(u8
*eui
, struct net_device
*dev
)
1706 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
1709 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1711 switch (dev
->type
) {
1714 return addrconf_ifid_eui48(eui
, dev
);
1716 return addrconf_ifid_arcnet(eui
, dev
);
1717 case ARPHRD_INFINIBAND
:
1718 return addrconf_ifid_infiniband(eui
, dev
);
1720 return addrconf_ifid_sit(eui
, dev
);
1722 return addrconf_ifid_gre(eui
, dev
);
1723 case ARPHRD_IEEE802154
:
1724 return addrconf_ifid_eui64(eui
, dev
);
1729 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1732 struct inet6_ifaddr
*ifp
;
1734 read_lock_bh(&idev
->lock
);
1735 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
1736 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1737 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1742 read_unlock_bh(&idev
->lock
);
1746 #ifdef CONFIG_IPV6_PRIVACY
1747 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1748 static void __ipv6_regen_rndid(struct inet6_dev
*idev
)
1751 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
1752 idev
->rndid
[0] &= ~0x02;
1755 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1756 * check if generated address is not inappropriate
1758 * - Reserved subnet anycast (RFC 2526)
1759 * 11111101 11....11 1xxxxxxx
1760 * - ISATAP (RFC4214) 6.1
1761 * 00-00-5E-FE-xx-xx-xx-xx
1763 * - XXX: already assigned to an address on the device
1765 if (idev
->rndid
[0] == 0xfd &&
1766 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1767 (idev
->rndid
[7]&0x80))
1769 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1770 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1772 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1777 static void ipv6_regen_rndid(unsigned long data
)
1779 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1780 unsigned long expires
;
1783 write_lock_bh(&idev
->lock
);
1788 __ipv6_regen_rndid(idev
);
1791 idev
->cnf
.temp_prefered_lft
* HZ
-
1792 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
-
1793 idev
->cnf
.max_desync_factor
* HZ
;
1794 if (time_before(expires
, jiffies
)) {
1795 pr_warn("%s: too short regeneration interval; timer disabled for %s\n",
1796 __func__
, idev
->dev
->name
);
1800 if (!mod_timer(&idev
->regen_timer
, expires
))
1804 write_unlock_bh(&idev
->lock
);
1805 rcu_read_unlock_bh();
1809 static void __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
)
1811 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1812 __ipv6_regen_rndid(idev
);
1821 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1822 unsigned long expires
, u32 flags
)
1824 struct fib6_config cfg
= {
1825 .fc_table
= RT6_TABLE_PREFIX
,
1826 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1827 .fc_ifindex
= dev
->ifindex
,
1828 .fc_expires
= expires
,
1830 .fc_flags
= RTF_UP
| flags
,
1831 .fc_nlinfo
.nl_net
= dev_net(dev
),
1832 .fc_protocol
= RTPROT_KERNEL
,
1837 /* Prevent useless cloning on PtP SIT.
1838 This thing is done here expecting that the whole
1839 class of non-broadcast devices need not cloning.
1841 #if IS_ENABLED(CONFIG_IPV6_SIT)
1842 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
1843 cfg
.fc_flags
|= RTF_NONEXTHOP
;
1846 ip6_route_add(&cfg
);
1850 static struct rt6_info
*addrconf_get_prefix_route(const struct in6_addr
*pfx
,
1852 const struct net_device
*dev
,
1853 u32 flags
, u32 noflags
)
1855 struct fib6_node
*fn
;
1856 struct rt6_info
*rt
= NULL
;
1857 struct fib6_table
*table
;
1859 table
= fib6_get_table(dev_net(dev
), RT6_TABLE_PREFIX
);
1863 read_lock_bh(&table
->tb6_lock
);
1864 fn
= fib6_locate(&table
->tb6_root
, pfx
, plen
, NULL
, 0);
1867 for (rt
= fn
->leaf
; rt
; rt
= rt
->dst
.rt6_next
) {
1868 if (rt
->dst
.dev
->ifindex
!= dev
->ifindex
)
1870 if ((rt
->rt6i_flags
& flags
) != flags
)
1872 if ((noflags
!= 0) && ((rt
->rt6i_flags
& flags
) != 0))
1878 read_unlock_bh(&table
->tb6_lock
);
1883 /* Create "default" multicast route to the interface */
1885 static void addrconf_add_mroute(struct net_device
*dev
)
1887 struct fib6_config cfg
= {
1888 .fc_table
= RT6_TABLE_LOCAL
,
1889 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1890 .fc_ifindex
= dev
->ifindex
,
1893 .fc_nlinfo
.nl_net
= dev_net(dev
),
1896 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
1898 ip6_route_add(&cfg
);
1901 #if IS_ENABLED(CONFIG_IPV6_SIT)
1902 static void sit_route_add(struct net_device
*dev
)
1904 struct fib6_config cfg
= {
1905 .fc_table
= RT6_TABLE_MAIN
,
1906 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1907 .fc_ifindex
= dev
->ifindex
,
1909 .fc_flags
= RTF_UP
| RTF_NONEXTHOP
,
1910 .fc_nlinfo
.nl_net
= dev_net(dev
),
1913 /* prefix length - 96 bits "::d.d.d.d" */
1914 ip6_route_add(&cfg
);
1918 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
1920 struct inet6_dev
*idev
;
1924 idev
= ipv6_find_idev(dev
);
1926 return ERR_PTR(-ENOBUFS
);
1928 if (idev
->cnf
.disable_ipv6
)
1929 return ERR_PTR(-EACCES
);
1931 /* Add default multicast route */
1932 if (!(dev
->flags
& IFF_LOOPBACK
))
1933 addrconf_add_mroute(dev
);
1938 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
, bool sllao
)
1940 struct prefix_info
*pinfo
;
1944 struct inet6_dev
*in6_dev
;
1945 struct net
*net
= dev_net(dev
);
1947 pinfo
= (struct prefix_info
*) opt
;
1949 if (len
< sizeof(struct prefix_info
)) {
1950 ADBG(("addrconf: prefix option too short\n"));
1955 * Validation checks ([ADDRCONF], page 19)
1958 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
1960 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
1963 valid_lft
= ntohl(pinfo
->valid
);
1964 prefered_lft
= ntohl(pinfo
->prefered
);
1966 if (prefered_lft
> valid_lft
) {
1967 net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n");
1971 in6_dev
= in6_dev_get(dev
);
1973 if (in6_dev
== NULL
) {
1974 net_dbg_ratelimited("addrconf: device %s not configured\n",
1980 * Two things going on here:
1981 * 1) Add routes for on-link prefixes
1982 * 2) Configure prefixes with the auto flag set
1985 if (pinfo
->onlink
) {
1986 struct rt6_info
*rt
;
1987 unsigned long rt_expires
;
1989 /* Avoid arithmetic overflow. Really, we could
1990 * save rt_expires in seconds, likely valid_lft,
1991 * but it would require division in fib gc, that it
1995 rt_expires
= addrconf_timeout_fixup(valid_lft
, HZ
);
1997 rt_expires
= addrconf_timeout_fixup(valid_lft
, USER_HZ
);
1999 if (addrconf_finite_timeout(rt_expires
))
2002 rt
= addrconf_get_prefix_route(&pinfo
->prefix
,
2005 RTF_ADDRCONF
| RTF_PREFIX_RT
,
2006 RTF_GATEWAY
| RTF_DEFAULT
);
2009 /* Autoconf prefix route */
2010 if (valid_lft
== 0) {
2013 } else if (addrconf_finite_timeout(rt_expires
)) {
2015 rt6_set_expires(rt
, jiffies
+ rt_expires
);
2017 rt6_clean_expires(rt
);
2019 } else if (valid_lft
) {
2020 clock_t expires
= 0;
2021 int flags
= RTF_ADDRCONF
| RTF_PREFIX_RT
;
2022 if (addrconf_finite_timeout(rt_expires
)) {
2024 flags
|= RTF_EXPIRES
;
2025 expires
= jiffies_to_clock_t(rt_expires
);
2027 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
2028 dev
, expires
, flags
);
2033 /* Try to figure out our local address for this prefix */
2035 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
2036 struct inet6_ifaddr
*ifp
;
2037 struct in6_addr addr
;
2038 int create
= 0, update_lft
= 0;
2040 if (pinfo
->prefix_len
== 64) {
2041 memcpy(&addr
, &pinfo
->prefix
, 8);
2042 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
2043 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
2044 in6_dev_put(in6_dev
);
2049 net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n",
2051 in6_dev_put(in6_dev
);
2056 ifp
= ipv6_get_ifaddr(net
, &addr
, dev
, 1);
2058 if (ifp
== NULL
&& valid_lft
) {
2059 int max_addresses
= in6_dev
->cnf
.max_addresses
;
2062 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2063 if (in6_dev
->cnf
.optimistic_dad
&&
2064 !net
->ipv6
.devconf_all
->forwarding
&& sllao
)
2065 addr_flags
= IFA_F_OPTIMISTIC
;
2068 /* Do not allow to create too much of autoconfigured
2069 * addresses; this would be too easy way to crash kernel.
2071 if (!max_addresses
||
2072 ipv6_count_addresses(in6_dev
) < max_addresses
)
2073 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
2074 addr_type
&IPV6_ADDR_SCOPE_MASK
,
2077 if (!ifp
|| IS_ERR(ifp
)) {
2078 in6_dev_put(in6_dev
);
2082 update_lft
= create
= 1;
2083 ifp
->cstamp
= jiffies
;
2084 addrconf_dad_start(ifp
);
2090 #ifdef CONFIG_IPV6_PRIVACY
2091 struct inet6_ifaddr
*ift
;
2095 /* update lifetime (RFC2462 5.5.3 e) */
2096 spin_lock(&ifp
->lock
);
2098 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
2099 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
2102 if (!update_lft
&& stored_lft
) {
2103 if (valid_lft
> MIN_VALID_LIFETIME
||
2104 valid_lft
> stored_lft
)
2106 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
2107 /* valid_lft <= stored_lft is always true */
2109 * RFC 4862 Section 5.5.3e:
2110 * "Note that the preferred lifetime of
2111 * the corresponding address is always
2112 * reset to the Preferred Lifetime in
2113 * the received Prefix Information
2114 * option, regardless of whether the
2115 * valid lifetime is also reset or
2118 * So if the preferred lifetime in
2119 * this advertisement is different
2120 * than what we have stored, but the
2121 * valid lifetime is invalid, just
2122 * reset prefered_lft.
2124 * We must set the valid lifetime
2125 * to the stored lifetime since we'll
2126 * be updating the timestamp below,
2127 * else we'll set it back to the
2130 if (prefered_lft
!= ifp
->prefered_lft
) {
2131 valid_lft
= stored_lft
;
2135 valid_lft
= MIN_VALID_LIFETIME
;
2136 if (valid_lft
< prefered_lft
)
2137 prefered_lft
= valid_lft
;
2143 ifp
->valid_lft
= valid_lft
;
2144 ifp
->prefered_lft
= prefered_lft
;
2147 ifp
->flags
&= ~IFA_F_DEPRECATED
;
2148 spin_unlock(&ifp
->lock
);
2150 if (!(flags
&IFA_F_TENTATIVE
))
2151 ipv6_ifa_notify(0, ifp
);
2153 spin_unlock(&ifp
->lock
);
2155 #ifdef CONFIG_IPV6_PRIVACY
2156 read_lock_bh(&in6_dev
->lock
);
2157 /* update all temporary addresses in the list */
2158 list_for_each_entry(ift
, &in6_dev
->tempaddr_list
,
2160 int age
, max_valid
, max_prefered
;
2162 if (ifp
!= ift
->ifpub
)
2166 * RFC 4941 section 3.3:
2167 * If a received option will extend the lifetime
2168 * of a public address, the lifetimes of
2169 * temporary addresses should be extended,
2170 * subject to the overall constraint that no
2171 * temporary addresses should ever remain
2172 * "valid" or "preferred" for a time longer than
2173 * (TEMP_VALID_LIFETIME) or
2174 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR),
2177 age
= (now
- ift
->cstamp
) / HZ
;
2178 max_valid
= in6_dev
->cnf
.temp_valid_lft
- age
;
2182 max_prefered
= in6_dev
->cnf
.temp_prefered_lft
-
2183 in6_dev
->cnf
.max_desync_factor
-
2185 if (max_prefered
< 0)
2188 if (valid_lft
> max_valid
)
2189 valid_lft
= max_valid
;
2191 if (prefered_lft
> max_prefered
)
2192 prefered_lft
= max_prefered
;
2194 spin_lock(&ift
->lock
);
2196 ift
->valid_lft
= valid_lft
;
2197 ift
->prefered_lft
= prefered_lft
;
2199 if (prefered_lft
> 0)
2200 ift
->flags
&= ~IFA_F_DEPRECATED
;
2202 spin_unlock(&ift
->lock
);
2203 if (!(flags
&IFA_F_TENTATIVE
))
2204 ipv6_ifa_notify(0, ift
);
2207 if ((create
|| list_empty(&in6_dev
->tempaddr_list
)) && in6_dev
->cnf
.use_tempaddr
> 0) {
2209 * When a new public address is created as
2210 * described in [ADDRCONF], also create a new
2211 * temporary address. Also create a temporary
2212 * address if it's enabled but no temporary
2213 * address currently exists.
2215 read_unlock_bh(&in6_dev
->lock
);
2216 ipv6_create_tempaddr(ifp
, NULL
);
2218 read_unlock_bh(&in6_dev
->lock
);
2225 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
2226 in6_dev_put(in6_dev
);
2230 * Set destination address.
2231 * Special case for SIT interfaces where we create a new "virtual"
2234 int addrconf_set_dstaddr(struct net
*net
, void __user
*arg
)
2236 struct in6_ifreq ireq
;
2237 struct net_device
*dev
;
2243 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2246 dev
= __dev_get_by_index(net
, ireq
.ifr6_ifindex
);
2252 #if IS_ENABLED(CONFIG_IPV6_SIT)
2253 if (dev
->type
== ARPHRD_SIT
) {
2254 const struct net_device_ops
*ops
= dev
->netdev_ops
;
2256 struct ip_tunnel_parm p
;
2258 err
= -EADDRNOTAVAIL
;
2259 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
2262 memset(&p
, 0, sizeof(p
));
2263 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
2267 p
.iph
.protocol
= IPPROTO_IPV6
;
2269 ifr
.ifr_ifru
.ifru_data
= (__force
void __user
*)&p
;
2271 if (ops
->ndo_do_ioctl
) {
2272 mm_segment_t oldfs
= get_fs();
2275 err
= ops
->ndo_do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
2282 dev
= __dev_get_by_name(net
, p
.name
);
2285 err
= dev_open(dev
);
2296 * Manual configuration of address on an interface
2298 static int inet6_addr_add(struct net
*net
, int ifindex
, const struct in6_addr
*pfx
,
2299 unsigned int plen
, __u8 ifa_flags
, __u32 prefered_lft
,
2302 struct inet6_ifaddr
*ifp
;
2303 struct inet6_dev
*idev
;
2304 struct net_device
*dev
;
2308 unsigned long timeout
;
2315 /* check the lifetime */
2316 if (!valid_lft
|| prefered_lft
> valid_lft
)
2319 dev
= __dev_get_by_index(net
, ifindex
);
2323 idev
= addrconf_add_dev(dev
);
2325 return PTR_ERR(idev
);
2327 scope
= ipv6_addr_scope(pfx
);
2329 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
2330 if (addrconf_finite_timeout(timeout
)) {
2331 expires
= jiffies_to_clock_t(timeout
* HZ
);
2332 valid_lft
= timeout
;
2333 flags
= RTF_EXPIRES
;
2337 ifa_flags
|= IFA_F_PERMANENT
;
2340 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
2341 if (addrconf_finite_timeout(timeout
)) {
2343 ifa_flags
|= IFA_F_DEPRECATED
;
2344 prefered_lft
= timeout
;
2347 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, ifa_flags
);
2350 spin_lock_bh(&ifp
->lock
);
2351 ifp
->valid_lft
= valid_lft
;
2352 ifp
->prefered_lft
= prefered_lft
;
2353 ifp
->tstamp
= jiffies
;
2354 spin_unlock_bh(&ifp
->lock
);
2356 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
2359 * Note that section 3.1 of RFC 4429 indicates
2360 * that the Optimistic flag should not be set for
2361 * manually configured addresses
2363 addrconf_dad_start(ifp
);
2369 return PTR_ERR(ifp
);
2372 static int inet6_addr_del(struct net
*net
, int ifindex
, const struct in6_addr
*pfx
,
2375 struct inet6_ifaddr
*ifp
;
2376 struct inet6_dev
*idev
;
2377 struct net_device
*dev
;
2382 dev
= __dev_get_by_index(net
, ifindex
);
2386 if ((idev
= __in6_dev_get(dev
)) == NULL
)
2389 read_lock_bh(&idev
->lock
);
2390 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
2391 if (ifp
->prefix_len
== plen
&&
2392 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
2394 read_unlock_bh(&idev
->lock
);
2398 /* If the last address is deleted administratively,
2399 disable IPv6 on this interface.
2401 if (list_empty(&idev
->addr_list
))
2402 addrconf_ifdown(idev
->dev
, 1);
2406 read_unlock_bh(&idev
->lock
);
2407 return -EADDRNOTAVAIL
;
2411 int addrconf_add_ifaddr(struct net
*net
, void __user
*arg
)
2413 struct in6_ifreq ireq
;
2416 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
2419 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2423 err
= inet6_addr_add(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2424 ireq
.ifr6_prefixlen
, IFA_F_PERMANENT
,
2425 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2430 int addrconf_del_ifaddr(struct net
*net
, void __user
*arg
)
2432 struct in6_ifreq ireq
;
2435 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
2438 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2442 err
= inet6_addr_del(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2443 ireq
.ifr6_prefixlen
);
2448 static void add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
2449 int plen
, int scope
)
2451 struct inet6_ifaddr
*ifp
;
2453 ifp
= ipv6_add_addr(idev
, addr
, plen
, scope
, IFA_F_PERMANENT
);
2455 spin_lock_bh(&ifp
->lock
);
2456 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2457 spin_unlock_bh(&ifp
->lock
);
2458 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2463 #if IS_ENABLED(CONFIG_IPV6_SIT)
2464 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
2466 struct in6_addr addr
;
2467 struct net_device
*dev
;
2468 struct net
*net
= dev_net(idev
->dev
);
2473 memset(&addr
, 0, sizeof(struct in6_addr
));
2474 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
2476 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
2477 addr
.s6_addr32
[0] = htonl(0xfe800000);
2480 scope
= IPV6_ADDR_COMPATv4
;
2483 if (addr
.s6_addr32
[3]) {
2484 add_addr(idev
, &addr
, 128, scope
);
2488 for_each_netdev(net
, dev
) {
2489 struct in_device
*in_dev
= __in_dev_get_rtnl(dev
);
2490 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
2491 struct in_ifaddr
*ifa
;
2495 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
2498 addr
.s6_addr32
[3] = ifa
->ifa_local
;
2500 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
2502 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
2503 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2507 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2512 add_addr(idev
, &addr
, plen
, flag
);
2519 static void init_loopback(struct net_device
*dev
)
2521 struct inet6_dev
*idev
;
2527 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2528 pr_debug("%s: add_dev failed\n", __func__
);
2532 add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
);
2535 static void addrconf_add_linklocal(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
2537 struct inet6_ifaddr
*ifp
;
2538 u32 addr_flags
= IFA_F_PERMANENT
;
2540 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2541 if (idev
->cnf
.optimistic_dad
&&
2542 !dev_net(idev
->dev
)->ipv6
.devconf_all
->forwarding
)
2543 addr_flags
|= IFA_F_OPTIMISTIC
;
2547 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, addr_flags
);
2549 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
2550 addrconf_dad_start(ifp
);
2555 static void addrconf_dev_config(struct net_device
*dev
)
2557 struct in6_addr addr
;
2558 struct inet6_dev
*idev
;
2562 if ((dev
->type
!= ARPHRD_ETHER
) &&
2563 (dev
->type
!= ARPHRD_FDDI
) &&
2564 (dev
->type
!= ARPHRD_ARCNET
) &&
2565 (dev
->type
!= ARPHRD_INFINIBAND
) &&
2566 (dev
->type
!= ARPHRD_IEEE802154
)) {
2567 /* Alas, we support only Ethernet autoconfiguration. */
2571 idev
= addrconf_add_dev(dev
);
2575 memset(&addr
, 0, sizeof(struct in6_addr
));
2576 addr
.s6_addr32
[0] = htonl(0xFE800000);
2578 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
2579 addrconf_add_linklocal(idev
, &addr
);
2582 #if IS_ENABLED(CONFIG_IPV6_SIT)
2583 static void addrconf_sit_config(struct net_device
*dev
)
2585 struct inet6_dev
*idev
;
2590 * Configure the tunnel with one of our IPv4
2591 * addresses... we should configure all of
2592 * our v4 addrs in the tunnel
2595 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2596 pr_debug("%s: add_dev failed\n", __func__
);
2600 if (dev
->priv_flags
& IFF_ISATAP
) {
2601 struct in6_addr addr
;
2603 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2604 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
2605 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
))
2606 addrconf_add_linklocal(idev
, &addr
);
2610 sit_add_v4_addrs(idev
);
2612 if (dev
->flags
&IFF_POINTOPOINT
)
2613 addrconf_add_mroute(dev
);
2619 #if IS_ENABLED(CONFIG_NET_IPGRE)
2620 static void addrconf_gre_config(struct net_device
*dev
)
2622 struct inet6_dev
*idev
;
2623 struct in6_addr addr
;
2625 pr_info("%s(%s)\n", __func__
, dev
->name
);
2629 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2630 pr_debug("%s: add_dev failed\n", __func__
);
2634 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2635 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
2637 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
))
2638 addrconf_add_linklocal(idev
, &addr
);
2643 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
2645 struct in6_addr lladdr
;
2647 if (!ipv6_get_lladdr(link_dev
, &lladdr
, IFA_F_TENTATIVE
)) {
2648 addrconf_add_linklocal(idev
, &lladdr
);
2654 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
2656 struct net_device
*link_dev
;
2657 struct net
*net
= dev_net(idev
->dev
);
2659 /* first try to inherit the link-local address from the link device */
2660 if (idev
->dev
->iflink
&&
2661 (link_dev
= __dev_get_by_index(net
, idev
->dev
->iflink
))) {
2662 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2665 /* then try to inherit it from any device */
2666 for_each_netdev(net
, link_dev
) {
2667 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2670 pr_debug("init ip6-ip6: add_linklocal failed\n");
2674 * Autoconfigure tunnel with a link-local address so routing protocols,
2675 * DHCPv6, MLD etc. can be run over the virtual link
2678 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
2680 struct inet6_dev
*idev
;
2684 idev
= addrconf_add_dev(dev
);
2686 pr_debug("init ip6-ip6: add_dev failed\n");
2689 ip6_tnl_add_linklocal(idev
);
2692 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
2695 struct net_device
*dev
= (struct net_device
*) data
;
2696 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2697 int run_pending
= 0;
2701 case NETDEV_REGISTER
:
2702 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2703 idev
= ipv6_add_dev(dev
);
2705 return notifier_from_errno(-ENOMEM
);
2711 if (dev
->flags
& IFF_SLAVE
)
2714 if (event
== NETDEV_UP
) {
2715 if (!addrconf_qdisc_ok(dev
)) {
2716 /* device is not ready yet. */
2717 pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n",
2722 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
)
2723 idev
= ipv6_add_dev(dev
);
2726 idev
->if_flags
|= IF_READY
;
2730 if (!addrconf_qdisc_ok(dev
)) {
2731 /* device is still not ready. */
2736 if (idev
->if_flags
& IF_READY
)
2737 /* device is already configured. */
2739 idev
->if_flags
|= IF_READY
;
2742 pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n",
2748 switch (dev
->type
) {
2749 #if IS_ENABLED(CONFIG_IPV6_SIT)
2751 addrconf_sit_config(dev
);
2754 #if IS_ENABLED(CONFIG_NET_IPGRE)
2756 addrconf_gre_config(dev
);
2759 case ARPHRD_TUNNEL6
:
2760 addrconf_ip6_tnl_config(dev
);
2762 case ARPHRD_LOOPBACK
:
2767 addrconf_dev_config(dev
);
2773 addrconf_dad_run(idev
);
2776 * If the MTU changed during the interface down,
2777 * when the interface up, the changed MTU must be
2778 * reflected in the idev as well as routers.
2780 if (idev
->cnf
.mtu6
!= dev
->mtu
&&
2781 dev
->mtu
>= IPV6_MIN_MTU
) {
2782 rt6_mtu_change(dev
, dev
->mtu
);
2783 idev
->cnf
.mtu6
= dev
->mtu
;
2785 idev
->tstamp
= jiffies
;
2786 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2789 * If the changed mtu during down is lower than
2790 * IPV6_MIN_MTU stop IPv6 on this interface.
2792 if (dev
->mtu
< IPV6_MIN_MTU
)
2793 addrconf_ifdown(dev
, 1);
2797 case NETDEV_CHANGEMTU
:
2798 if (idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2799 rt6_mtu_change(dev
, dev
->mtu
);
2800 idev
->cnf
.mtu6
= dev
->mtu
;
2804 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2805 idev
= ipv6_add_dev(dev
);
2811 * MTU falled under IPV6_MIN_MTU.
2812 * Stop IPv6 on this interface.
2816 case NETDEV_UNREGISTER
:
2818 * Remove all addresses from this interface.
2820 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2823 case NETDEV_CHANGENAME
:
2825 snmp6_unregister_dev(idev
);
2826 addrconf_sysctl_unregister(idev
);
2827 addrconf_sysctl_register(idev
);
2828 err
= snmp6_register_dev(idev
);
2830 return notifier_from_errno(err
);
2834 case NETDEV_PRE_TYPE_CHANGE
:
2835 case NETDEV_POST_TYPE_CHANGE
:
2836 addrconf_type_change(dev
, event
);
2844 * addrconf module should be notified of a device going up
2846 static struct notifier_block ipv6_dev_notf
= {
2847 .notifier_call
= addrconf_notify
,
2850 static void addrconf_type_change(struct net_device
*dev
, unsigned long event
)
2852 struct inet6_dev
*idev
;
2855 idev
= __in6_dev_get(dev
);
2857 if (event
== NETDEV_POST_TYPE_CHANGE
)
2858 ipv6_mc_remap(idev
);
2859 else if (event
== NETDEV_PRE_TYPE_CHANGE
)
2860 ipv6_mc_unmap(idev
);
2863 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2865 struct net
*net
= dev_net(dev
);
2866 struct inet6_dev
*idev
;
2867 struct inet6_ifaddr
*ifa
;
2872 rt6_ifdown(net
, dev
);
2873 neigh_ifdown(&nd_tbl
, dev
);
2875 idev
= __in6_dev_get(dev
);
2880 * Step 1: remove reference to ipv6 device from parent device.
2886 /* protected by rtnl_lock */
2887 RCU_INIT_POINTER(dev
->ip6_ptr
, NULL
);
2889 /* Step 1.5: remove snmp6 entry */
2890 snmp6_unregister_dev(idev
);
2894 /* Step 2: clear hash table */
2895 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
2896 struct hlist_head
*h
= &inet6_addr_lst
[i
];
2897 struct hlist_node
*n
;
2899 spin_lock_bh(&addrconf_hash_lock
);
2901 hlist_for_each_entry_rcu(ifa
, n
, h
, addr_lst
) {
2902 if (ifa
->idev
== idev
) {
2903 hlist_del_init_rcu(&ifa
->addr_lst
);
2904 addrconf_del_timer(ifa
);
2908 spin_unlock_bh(&addrconf_hash_lock
);
2911 write_lock_bh(&idev
->lock
);
2913 /* Step 2: clear flags for stateless addrconf */
2915 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
2917 #ifdef CONFIG_IPV6_PRIVACY
2918 if (how
&& del_timer(&idev
->regen_timer
))
2921 /* Step 3: clear tempaddr list */
2922 while (!list_empty(&idev
->tempaddr_list
)) {
2923 ifa
= list_first_entry(&idev
->tempaddr_list
,
2924 struct inet6_ifaddr
, tmp_list
);
2925 list_del(&ifa
->tmp_list
);
2926 write_unlock_bh(&idev
->lock
);
2927 spin_lock_bh(&ifa
->lock
);
2930 in6_ifa_put(ifa
->ifpub
);
2933 spin_unlock_bh(&ifa
->lock
);
2935 write_lock_bh(&idev
->lock
);
2939 while (!list_empty(&idev
->addr_list
)) {
2940 ifa
= list_first_entry(&idev
->addr_list
,
2941 struct inet6_ifaddr
, if_list
);
2942 addrconf_del_timer(ifa
);
2944 list_del(&ifa
->if_list
);
2946 write_unlock_bh(&idev
->lock
);
2948 spin_lock_bh(&ifa
->state_lock
);
2950 ifa
->state
= INET6_IFADDR_STATE_DEAD
;
2951 spin_unlock_bh(&ifa
->state_lock
);
2953 if (state
!= INET6_IFADDR_STATE_DEAD
) {
2954 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
2955 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifa
);
2959 write_lock_bh(&idev
->lock
);
2962 write_unlock_bh(&idev
->lock
);
2964 /* Step 5: Discard multicast list */
2966 ipv6_mc_destroy_dev(idev
);
2970 idev
->tstamp
= jiffies
;
2972 /* Last: Shot the device (if unregistered) */
2974 addrconf_sysctl_unregister(idev
);
2975 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
2976 neigh_ifdown(&nd_tbl
, dev
);
2982 static void addrconf_rs_timer(unsigned long data
)
2984 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2985 struct inet6_dev
*idev
= ifp
->idev
;
2987 read_lock(&idev
->lock
);
2988 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
))
2991 if (idev
->cnf
.forwarding
)
2994 /* Announcement received after solicitation was sent */
2995 if (idev
->if_flags
& IF_RA_RCVD
)
2998 spin_lock(&ifp
->lock
);
2999 if (ifp
->probes
++ < idev
->cnf
.rtr_solicits
) {
3000 /* The wait after the last probe can be shorter */
3001 addrconf_mod_timer(ifp
, AC_RS
,
3002 (ifp
->probes
== idev
->cnf
.rtr_solicits
) ?
3003 idev
->cnf
.rtr_solicit_delay
:
3004 idev
->cnf
.rtr_solicit_interval
);
3005 spin_unlock(&ifp
->lock
);
3007 ndisc_send_rs(idev
->dev
, &ifp
->addr
, &in6addr_linklocal_allrouters
);
3009 spin_unlock(&ifp
->lock
);
3011 * Note: we do not support deprecated "all on-link"
3012 * assumption any longer.
3014 pr_debug("%s: no IPv6 routers present\n", idev
->dev
->name
);
3018 read_unlock(&idev
->lock
);
3023 * Duplicate Address Detection
3025 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
3027 unsigned long rand_num
;
3028 struct inet6_dev
*idev
= ifp
->idev
;
3030 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
3033 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
3035 ifp
->probes
= idev
->cnf
.dad_transmits
;
3036 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
3039 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
)
3041 struct inet6_dev
*idev
= ifp
->idev
;
3042 struct net_device
*dev
= idev
->dev
;
3044 addrconf_join_solict(dev
, &ifp
->addr
);
3046 net_srandom(ifp
->addr
.s6_addr32
[3]);
3048 read_lock_bh(&idev
->lock
);
3049 spin_lock(&ifp
->lock
);
3050 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
)
3053 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
3054 idev
->cnf
.accept_dad
< 1 ||
3055 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
3056 ifp
->flags
& IFA_F_NODAD
) {
3057 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
3058 spin_unlock(&ifp
->lock
);
3059 read_unlock_bh(&idev
->lock
);
3061 addrconf_dad_completed(ifp
);
3065 if (!(idev
->if_flags
& IF_READY
)) {
3066 spin_unlock(&ifp
->lock
);
3067 read_unlock_bh(&idev
->lock
);
3069 * If the device is not ready:
3070 * - keep it tentative if it is a permanent address.
3071 * - otherwise, kill it.
3074 addrconf_dad_stop(ifp
, 0);
3079 * Optimistic nodes can start receiving
3082 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
3083 ip6_ins_rt(ifp
->rt
);
3085 addrconf_dad_kick(ifp
);
3087 spin_unlock(&ifp
->lock
);
3088 read_unlock_bh(&idev
->lock
);
3091 static void addrconf_dad_timer(unsigned long data
)
3093 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
3094 struct inet6_dev
*idev
= ifp
->idev
;
3095 struct in6_addr mcaddr
;
3097 if (!ifp
->probes
&& addrconf_dad_end(ifp
))
3100 read_lock(&idev
->lock
);
3101 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
)) {
3102 read_unlock(&idev
->lock
);
3106 spin_lock(&ifp
->lock
);
3107 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
) {
3108 spin_unlock(&ifp
->lock
);
3109 read_unlock(&idev
->lock
);
3113 if (ifp
->probes
== 0) {
3115 * DAD was successful
3118 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
3119 spin_unlock(&ifp
->lock
);
3120 read_unlock(&idev
->lock
);
3122 addrconf_dad_completed(ifp
);
3128 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
3129 spin_unlock(&ifp
->lock
);
3130 read_unlock(&idev
->lock
);
3132 /* send a neighbour solicitation for our addr */
3133 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
3134 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &in6addr_any
);
3139 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
3141 struct net_device
*dev
= ifp
->idev
->dev
;
3144 * Configure the address for reception. Now it is valid.
3147 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
3149 /* If added prefix is link local and we are prepared to process
3150 router advertisements, start sending router solicitations.
3153 if (ipv6_accept_ra(ifp
->idev
) &&
3154 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
3155 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
3156 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
3158 * If a host as already performed a random delay
3159 * [...] as part of DAD [...] there is no need
3160 * to delay again before sending the first RS
3162 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &in6addr_linklocal_allrouters
);
3164 spin_lock_bh(&ifp
->lock
);
3166 ifp
->idev
->if_flags
|= IF_RS_SENT
;
3167 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
3168 spin_unlock_bh(&ifp
->lock
);
3172 static void addrconf_dad_run(struct inet6_dev
*idev
)
3174 struct inet6_ifaddr
*ifp
;
3176 read_lock_bh(&idev
->lock
);
3177 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
3178 spin_lock(&ifp
->lock
);
3179 if (ifp
->flags
& IFA_F_TENTATIVE
&&
3180 ifp
->state
== INET6_IFADDR_STATE_DAD
)
3181 addrconf_dad_kick(ifp
);
3182 spin_unlock(&ifp
->lock
);
3184 read_unlock_bh(&idev
->lock
);
3187 #ifdef CONFIG_PROC_FS
3188 struct if6_iter_state
{
3189 struct seq_net_private p
;
3194 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
, loff_t pos
)
3196 struct inet6_ifaddr
*ifa
= NULL
;
3197 struct if6_iter_state
*state
= seq
->private;
3198 struct net
*net
= seq_file_net(seq
);
3201 /* initial bucket if pos is 0 */
3207 for (; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
3208 struct hlist_node
*n
;
3209 hlist_for_each_entry_rcu_bh(ifa
, n
, &inet6_addr_lst
[state
->bucket
],
3211 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
3213 /* sync with offset */
3214 if (p
< state
->offset
) {
3222 /* prepare for next bucket */
3229 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
,
3230 struct inet6_ifaddr
*ifa
)
3232 struct if6_iter_state
*state
= seq
->private;
3233 struct net
*net
= seq_file_net(seq
);
3234 struct hlist_node
*n
= &ifa
->addr_lst
;
3236 hlist_for_each_entry_continue_rcu_bh(ifa
, n
, addr_lst
) {
3237 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
3243 while (++state
->bucket
< IN6_ADDR_HSIZE
) {
3245 hlist_for_each_entry_rcu_bh(ifa
, n
,
3246 &inet6_addr_lst
[state
->bucket
], addr_lst
) {
3247 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
3257 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
3261 return if6_get_first(seq
, *pos
);
3264 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
3266 struct inet6_ifaddr
*ifa
;
3268 ifa
= if6_get_next(seq
, v
);
3273 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
3276 rcu_read_unlock_bh();
3279 static int if6_seq_show(struct seq_file
*seq
, void *v
)
3281 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
3282 seq_printf(seq
, "%pi6 %02x %02x %02x %02x %8s\n",
3284 ifp
->idev
->dev
->ifindex
,
3288 ifp
->idev
->dev
->name
);
3292 static const struct seq_operations if6_seq_ops
= {
3293 .start
= if6_seq_start
,
3294 .next
= if6_seq_next
,
3295 .show
= if6_seq_show
,
3296 .stop
= if6_seq_stop
,
3299 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
3301 return seq_open_net(inode
, file
, &if6_seq_ops
,
3302 sizeof(struct if6_iter_state
));
3305 static const struct file_operations if6_fops
= {
3306 .owner
= THIS_MODULE
,
3307 .open
= if6_seq_open
,
3309 .llseek
= seq_lseek
,
3310 .release
= seq_release_net
,
3313 static int __net_init
if6_proc_net_init(struct net
*net
)
3315 if (!proc_net_fops_create(net
, "if_inet6", S_IRUGO
, &if6_fops
))
3320 static void __net_exit
if6_proc_net_exit(struct net
*net
)
3322 proc_net_remove(net
, "if_inet6");
3325 static struct pernet_operations if6_proc_net_ops
= {
3326 .init
= if6_proc_net_init
,
3327 .exit
= if6_proc_net_exit
,
3330 int __init
if6_proc_init(void)
3332 return register_pernet_subsys(&if6_proc_net_ops
);
3335 void if6_proc_exit(void)
3337 unregister_pernet_subsys(&if6_proc_net_ops
);
3339 #endif /* CONFIG_PROC_FS */
3341 #if IS_ENABLED(CONFIG_IPV6_MIP6)
3342 /* Check if address is a home address configured on any interface. */
3343 int ipv6_chk_home_addr(struct net
*net
, const struct in6_addr
*addr
)
3346 struct inet6_ifaddr
*ifp
= NULL
;
3347 struct hlist_node
*n
;
3348 unsigned int hash
= inet6_addr_hash(addr
);
3351 hlist_for_each_entry_rcu_bh(ifp
, n
, &inet6_addr_lst
[hash
], addr_lst
) {
3352 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
3354 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
3355 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
3360 rcu_read_unlock_bh();
3366 * Periodic address status verification
3369 static void addrconf_verify(unsigned long foo
)
3371 unsigned long now
, next
, next_sec
, next_sched
;
3372 struct inet6_ifaddr
*ifp
;
3373 struct hlist_node
*node
;
3377 spin_lock(&addrconf_verify_lock
);
3379 next
= round_jiffies_up(now
+ ADDR_CHECK_FREQUENCY
);
3381 del_timer(&addr_chk_timer
);
3383 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
3385 hlist_for_each_entry_rcu_bh(ifp
, node
,
3386 &inet6_addr_lst
[i
], addr_lst
) {
3389 if (ifp
->flags
& IFA_F_PERMANENT
)
3392 spin_lock(&ifp
->lock
);
3393 /* We try to batch several events at once. */
3394 age
= (now
- ifp
->tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
3396 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
3397 age
>= ifp
->valid_lft
) {
3398 spin_unlock(&ifp
->lock
);
3402 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
3403 spin_unlock(&ifp
->lock
);
3405 } else if (age
>= ifp
->prefered_lft
) {
3406 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
3409 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
3411 ifp
->flags
|= IFA_F_DEPRECATED
;
3414 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
3415 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
3417 spin_unlock(&ifp
->lock
);
3422 ipv6_ifa_notify(0, ifp
);
3426 #ifdef CONFIG_IPV6_PRIVACY
3427 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
3428 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
3429 unsigned long regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
3430 ifp
->idev
->cnf
.dad_transmits
*
3431 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
3433 if (age
>= ifp
->prefered_lft
- regen_advance
) {
3434 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
3435 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3436 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3437 if (!ifp
->regen_count
&& ifpub
) {
3440 in6_ifa_hold(ifpub
);
3441 spin_unlock(&ifp
->lock
);
3443 spin_lock(&ifpub
->lock
);
3444 ifpub
->regen_count
= 0;
3445 spin_unlock(&ifpub
->lock
);
3446 ipv6_create_tempaddr(ifpub
, ifp
);
3451 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
3452 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
3453 spin_unlock(&ifp
->lock
);
3456 /* ifp->prefered_lft <= ifp->valid_lft */
3457 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3458 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3459 spin_unlock(&ifp
->lock
);
3464 next_sec
= round_jiffies_up(next
);
3467 /* If rounded timeout is accurate enough, accept it. */
3468 if (time_before(next_sec
, next
+ ADDRCONF_TIMER_FUZZ
))
3469 next_sched
= next_sec
;
3471 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
3472 if (time_before(next_sched
, jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
))
3473 next_sched
= jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
;
3475 ADBG((KERN_DEBUG
"now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
3476 now
, next
, next_sec
, next_sched
));
3478 addr_chk_timer
.expires
= next_sched
;
3479 add_timer(&addr_chk_timer
);
3480 spin_unlock(&addrconf_verify_lock
);
3481 rcu_read_unlock_bh();
3484 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
)
3486 struct in6_addr
*pfx
= NULL
;
3489 pfx
= nla_data(addr
);
3492 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
3495 pfx
= nla_data(local
);
3501 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
3502 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
3503 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
3504 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
3508 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3510 struct net
*net
= sock_net(skb
->sk
);
3511 struct ifaddrmsg
*ifm
;
3512 struct nlattr
*tb
[IFA_MAX
+1];
3513 struct in6_addr
*pfx
;
3516 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3520 ifm
= nlmsg_data(nlh
);
3521 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3525 return inet6_addr_del(net
, ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
3528 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u8 ifa_flags
,
3529 u32 prefered_lft
, u32 valid_lft
)
3533 unsigned long timeout
;
3535 if (!valid_lft
|| (prefered_lft
> valid_lft
))
3538 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
3539 if (addrconf_finite_timeout(timeout
)) {
3540 expires
= jiffies_to_clock_t(timeout
* HZ
);
3541 valid_lft
= timeout
;
3542 flags
= RTF_EXPIRES
;
3546 ifa_flags
|= IFA_F_PERMANENT
;
3549 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
3550 if (addrconf_finite_timeout(timeout
)) {
3552 ifa_flags
|= IFA_F_DEPRECATED
;
3553 prefered_lft
= timeout
;
3556 spin_lock_bh(&ifp
->lock
);
3557 ifp
->flags
= (ifp
->flags
& ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
| IFA_F_HOMEADDRESS
)) | ifa_flags
;
3558 ifp
->tstamp
= jiffies
;
3559 ifp
->valid_lft
= valid_lft
;
3560 ifp
->prefered_lft
= prefered_lft
;
3562 spin_unlock_bh(&ifp
->lock
);
3563 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
3564 ipv6_ifa_notify(0, ifp
);
3566 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
3574 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3576 struct net
*net
= sock_net(skb
->sk
);
3577 struct ifaddrmsg
*ifm
;
3578 struct nlattr
*tb
[IFA_MAX
+1];
3579 struct in6_addr
*pfx
;
3580 struct inet6_ifaddr
*ifa
;
3581 struct net_device
*dev
;
3582 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
3586 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3590 ifm
= nlmsg_data(nlh
);
3591 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3595 if (tb
[IFA_CACHEINFO
]) {
3596 struct ifa_cacheinfo
*ci
;
3598 ci
= nla_data(tb
[IFA_CACHEINFO
]);
3599 valid_lft
= ci
->ifa_valid
;
3600 preferred_lft
= ci
->ifa_prefered
;
3602 preferred_lft
= INFINITY_LIFE_TIME
;
3603 valid_lft
= INFINITY_LIFE_TIME
;
3606 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3610 /* We ignore other flags so far. */
3611 ifa_flags
= ifm
->ifa_flags
& (IFA_F_NODAD
| IFA_F_HOMEADDRESS
);
3613 ifa
= ipv6_get_ifaddr(net
, pfx
, dev
, 1);
3616 * It would be best to check for !NLM_F_CREATE here but
3617 * userspace alreay relies on not having to provide this.
3619 return inet6_addr_add(net
, ifm
->ifa_index
, pfx
,
3620 ifm
->ifa_prefixlen
, ifa_flags
,
3621 preferred_lft
, valid_lft
);
3624 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
3625 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
3628 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
3635 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u8 flags
,
3636 u8 scope
, int ifindex
)
3638 struct ifaddrmsg
*ifm
;
3640 ifm
= nlmsg_data(nlh
);
3641 ifm
->ifa_family
= AF_INET6
;
3642 ifm
->ifa_prefixlen
= prefixlen
;
3643 ifm
->ifa_flags
= flags
;
3644 ifm
->ifa_scope
= scope
;
3645 ifm
->ifa_index
= ifindex
;
3648 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
3649 unsigned long tstamp
, u32 preferred
, u32 valid
)
3651 struct ifa_cacheinfo ci
;
3653 ci
.cstamp
= cstamp_delta(cstamp
);
3654 ci
.tstamp
= cstamp_delta(tstamp
);
3655 ci
.ifa_prefered
= preferred
;
3656 ci
.ifa_valid
= valid
;
3658 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
3661 static inline int rt_scope(int ifa_scope
)
3663 if (ifa_scope
& IFA_HOST
)
3664 return RT_SCOPE_HOST
;
3665 else if (ifa_scope
& IFA_LINK
)
3666 return RT_SCOPE_LINK
;
3667 else if (ifa_scope
& IFA_SITE
)
3668 return RT_SCOPE_SITE
;
3670 return RT_SCOPE_UNIVERSE
;
3673 static inline int inet6_ifaddr_msgsize(void)
3675 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
3676 + nla_total_size(16) /* IFA_ADDRESS */
3677 + nla_total_size(sizeof(struct ifa_cacheinfo
));
3680 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
3681 u32 portid
, u32 seq
, int event
, unsigned int flags
)
3683 struct nlmsghdr
*nlh
;
3684 u32 preferred
, valid
;
3686 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3690 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
3691 ifa
->idev
->dev
->ifindex
);
3693 if (!(ifa
->flags
&IFA_F_PERMANENT
)) {
3694 preferred
= ifa
->prefered_lft
;
3695 valid
= ifa
->valid_lft
;
3696 if (preferred
!= INFINITY_LIFE_TIME
) {
3697 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
3698 if (preferred
> tval
)
3702 if (valid
!= INFINITY_LIFE_TIME
) {
3710 preferred
= INFINITY_LIFE_TIME
;
3711 valid
= INFINITY_LIFE_TIME
;
3714 if (nla_put(skb
, IFA_ADDRESS
, 16, &ifa
->addr
) < 0 ||
3715 put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0) {
3716 nlmsg_cancel(skb
, nlh
);
3720 return nlmsg_end(skb
, nlh
);
3723 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
3724 u32 portid
, u32 seq
, int event
, u16 flags
)
3726 struct nlmsghdr
*nlh
;
3727 u8 scope
= RT_SCOPE_UNIVERSE
;
3728 int ifindex
= ifmca
->idev
->dev
->ifindex
;
3730 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
3731 scope
= RT_SCOPE_SITE
;
3733 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3737 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3738 if (nla_put(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
) < 0 ||
3739 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
3740 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3741 nlmsg_cancel(skb
, nlh
);
3745 return nlmsg_end(skb
, nlh
);
3748 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
3749 u32 portid
, u32 seq
, int event
, unsigned int flags
)
3751 struct nlmsghdr
*nlh
;
3752 u8 scope
= RT_SCOPE_UNIVERSE
;
3753 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
3755 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
3756 scope
= RT_SCOPE_SITE
;
3758 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3762 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3763 if (nla_put(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
) < 0 ||
3764 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
3765 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3766 nlmsg_cancel(skb
, nlh
);
3770 return nlmsg_end(skb
, nlh
);
3779 /* called with rcu_read_lock() */
3780 static int in6_dump_addrs(struct inet6_dev
*idev
, struct sk_buff
*skb
,
3781 struct netlink_callback
*cb
, enum addr_type_t type
,
3782 int s_ip_idx
, int *p_ip_idx
)
3784 struct ifmcaddr6
*ifmca
;
3785 struct ifacaddr6
*ifaca
;
3787 int ip_idx
= *p_ip_idx
;
3789 read_lock_bh(&idev
->lock
);
3791 case UNICAST_ADDR
: {
3792 struct inet6_ifaddr
*ifa
;
3794 /* unicast address incl. temp addr */
3795 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
3796 if (++ip_idx
< s_ip_idx
)
3798 err
= inet6_fill_ifaddr(skb
, ifa
,
3799 NETLINK_CB(cb
->skb
).portid
,
3808 case MULTICAST_ADDR
:
3809 /* multicast address */
3810 for (ifmca
= idev
->mc_list
; ifmca
;
3811 ifmca
= ifmca
->next
, ip_idx
++) {
3812 if (ip_idx
< s_ip_idx
)
3814 err
= inet6_fill_ifmcaddr(skb
, ifmca
,
3815 NETLINK_CB(cb
->skb
).portid
,
3824 /* anycast address */
3825 for (ifaca
= idev
->ac_list
; ifaca
;
3826 ifaca
= ifaca
->aca_next
, ip_idx
++) {
3827 if (ip_idx
< s_ip_idx
)
3829 err
= inet6_fill_ifacaddr(skb
, ifaca
,
3830 NETLINK_CB(cb
->skb
).portid
,
3841 read_unlock_bh(&idev
->lock
);
3846 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3847 enum addr_type_t type
)
3849 struct net
*net
= sock_net(skb
->sk
);
3852 int s_idx
, s_ip_idx
;
3853 struct net_device
*dev
;
3854 struct inet6_dev
*idev
;
3855 struct hlist_head
*head
;
3856 struct hlist_node
*node
;
3859 s_idx
= idx
= cb
->args
[1];
3860 s_ip_idx
= ip_idx
= cb
->args
[2];
3863 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
3865 head
= &net
->dev_index_head
[h
];
3866 hlist_for_each_entry_rcu(dev
, node
, head
, index_hlist
) {
3869 if (h
> s_h
|| idx
> s_idx
)
3872 idev
= __in6_dev_get(dev
);
3876 if (in6_dump_addrs(idev
, skb
, cb
, type
,
3877 s_ip_idx
, &ip_idx
) <= 0)
3887 cb
->args
[2] = ip_idx
;
3892 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3894 enum addr_type_t type
= UNICAST_ADDR
;
3896 return inet6_dump_addr(skb
, cb
, type
);
3899 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3901 enum addr_type_t type
= MULTICAST_ADDR
;
3903 return inet6_dump_addr(skb
, cb
, type
);
3907 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3909 enum addr_type_t type
= ANYCAST_ADDR
;
3911 return inet6_dump_addr(skb
, cb
, type
);
3914 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
*nlh
,
3917 struct net
*net
= sock_net(in_skb
->sk
);
3918 struct ifaddrmsg
*ifm
;
3919 struct nlattr
*tb
[IFA_MAX
+1];
3920 struct in6_addr
*addr
= NULL
;
3921 struct net_device
*dev
= NULL
;
3922 struct inet6_ifaddr
*ifa
;
3923 struct sk_buff
*skb
;
3926 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3930 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3936 ifm
= nlmsg_data(nlh
);
3938 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3940 ifa
= ipv6_get_ifaddr(net
, addr
, dev
, 1);
3942 err
= -EADDRNOTAVAIL
;
3946 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
);
3952 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).portid
,
3953 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
3955 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3956 WARN_ON(err
== -EMSGSIZE
);
3960 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).portid
);
3967 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
3969 struct sk_buff
*skb
;
3970 struct net
*net
= dev_net(ifa
->idev
->dev
);
3973 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
3977 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
3979 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3980 WARN_ON(err
== -EMSGSIZE
);
3984 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3988 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
3991 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
3992 __s32
*array
, int bytes
)
3994 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
3996 memset(array
, 0, bytes
);
3997 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
3998 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
3999 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
4000 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
4001 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
4002 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
4003 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
4004 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
4005 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] =
4006 jiffies_to_msecs(cnf
->rtr_solicit_interval
);
4007 array
[DEVCONF_RTR_SOLICIT_DELAY
] =
4008 jiffies_to_msecs(cnf
->rtr_solicit_delay
);
4009 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
4010 #ifdef CONFIG_IPV6_PRIVACY
4011 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
4012 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
4013 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
4014 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
4015 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
4017 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
4018 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
4019 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
4020 #ifdef CONFIG_IPV6_ROUTER_PREF
4021 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
4022 array
[DEVCONF_RTR_PROBE_INTERVAL
] =
4023 jiffies_to_msecs(cnf
->rtr_probe_interval
);
4024 #ifdef CONFIG_IPV6_ROUTE_INFO
4025 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
4028 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
4029 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
4030 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4031 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
4033 #ifdef CONFIG_IPV6_MROUTE
4034 array
[DEVCONF_MC_FORWARDING
] = cnf
->mc_forwarding
;
4036 array
[DEVCONF_DISABLE_IPV6
] = cnf
->disable_ipv6
;
4037 array
[DEVCONF_ACCEPT_DAD
] = cnf
->accept_dad
;
4038 array
[DEVCONF_FORCE_TLLAO
] = cnf
->force_tllao
;
4039 array
[DEVCONF_NDISC_NOTIFY
] = cnf
->ndisc_notify
;
4042 static inline size_t inet6_ifla6_size(void)
4044 return nla_total_size(4) /* IFLA_INET6_FLAGS */
4045 + nla_total_size(sizeof(struct ifla_cacheinfo
))
4046 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
4047 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
4048 + nla_total_size(ICMP6_MIB_MAX
* 8); /* IFLA_INET6_ICMP6STATS */
4051 static inline size_t inet6_if_nlmsg_size(void)
4053 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
4054 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
4055 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
4056 + nla_total_size(4) /* IFLA_MTU */
4057 + nla_total_size(4) /* IFLA_LINK */
4058 + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
4061 static inline void __snmp6_fill_statsdev(u64
*stats
, atomic_long_t
*mib
,
4062 int items
, int bytes
)
4065 int pad
= bytes
- sizeof(u64
) * items
;
4068 /* Use put_unaligned() because stats may not be aligned for u64. */
4069 put_unaligned(items
, &stats
[0]);
4070 for (i
= 1; i
< items
; i
++)
4071 put_unaligned(atomic_long_read(&mib
[i
]), &stats
[i
]);
4073 memset(&stats
[items
], 0, pad
);
4076 static inline void __snmp6_fill_stats64(u64
*stats
, void __percpu
**mib
,
4077 int items
, int bytes
, size_t syncpoff
)
4080 int pad
= bytes
- sizeof(u64
) * items
;
4083 /* Use put_unaligned() because stats may not be aligned for u64. */
4084 put_unaligned(items
, &stats
[0]);
4085 for (i
= 1; i
< items
; i
++)
4086 put_unaligned(snmp_fold_field64(mib
, i
, syncpoff
), &stats
[i
]);
4088 memset(&stats
[items
], 0, pad
);
4091 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
4095 case IFLA_INET6_STATS
:
4096 __snmp6_fill_stats64(stats
, (void __percpu
**)idev
->stats
.ipv6
,
4097 IPSTATS_MIB_MAX
, bytes
, offsetof(struct ipstats_mib
, syncp
));
4099 case IFLA_INET6_ICMP6STATS
:
4100 __snmp6_fill_statsdev(stats
, idev
->stats
.icmpv6dev
->mibs
, ICMP6_MIB_MAX
, bytes
);
4105 static int inet6_fill_ifla6_attrs(struct sk_buff
*skb
, struct inet6_dev
*idev
)
4108 struct ifla_cacheinfo ci
;
4110 if (nla_put_u32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
))
4111 goto nla_put_failure
;
4112 ci
.max_reasm_len
= IPV6_MAXPLEN
;
4113 ci
.tstamp
= cstamp_delta(idev
->tstamp
);
4114 ci
.reachable_time
= jiffies_to_msecs(idev
->nd_parms
->reachable_time
);
4115 ci
.retrans_time
= jiffies_to_msecs(idev
->nd_parms
->retrans_time
);
4116 if (nla_put(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
))
4117 goto nla_put_failure
;
4118 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
4120 goto nla_put_failure
;
4121 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
4123 /* XXX - MC not implemented */
4125 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
4127 goto nla_put_failure
;
4128 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
4130 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
4132 goto nla_put_failure
;
4133 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
4141 static size_t inet6_get_link_af_size(const struct net_device
*dev
)
4143 if (!__in6_dev_get(dev
))
4146 return inet6_ifla6_size();
4149 static int inet6_fill_link_af(struct sk_buff
*skb
, const struct net_device
*dev
)
4151 struct inet6_dev
*idev
= __in6_dev_get(dev
);
4156 if (inet6_fill_ifla6_attrs(skb
, idev
) < 0)
4162 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
4163 u32 portid
, u32 seq
, int event
, unsigned int flags
)
4165 struct net_device
*dev
= idev
->dev
;
4166 struct ifinfomsg
*hdr
;
4167 struct nlmsghdr
*nlh
;
4170 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*hdr
), flags
);
4174 hdr
= nlmsg_data(nlh
);
4175 hdr
->ifi_family
= AF_INET6
;
4177 hdr
->ifi_type
= dev
->type
;
4178 hdr
->ifi_index
= dev
->ifindex
;
4179 hdr
->ifi_flags
= dev_get_flags(dev
);
4180 hdr
->ifi_change
= 0;
4182 if (nla_put_string(skb
, IFLA_IFNAME
, dev
->name
) ||
4184 nla_put(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
)) ||
4185 nla_put_u32(skb
, IFLA_MTU
, dev
->mtu
) ||
4186 (dev
->ifindex
!= dev
->iflink
&&
4187 nla_put_u32(skb
, IFLA_LINK
, dev
->iflink
)))
4188 goto nla_put_failure
;
4189 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
4190 if (protoinfo
== NULL
)
4191 goto nla_put_failure
;
4193 if (inet6_fill_ifla6_attrs(skb
, idev
) < 0)
4194 goto nla_put_failure
;
4196 nla_nest_end(skb
, protoinfo
);
4197 return nlmsg_end(skb
, nlh
);
4200 nlmsg_cancel(skb
, nlh
);
4204 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4206 struct net
*net
= sock_net(skb
->sk
);
4209 struct net_device
*dev
;
4210 struct inet6_dev
*idev
;
4211 struct hlist_head
*head
;
4212 struct hlist_node
*node
;
4215 s_idx
= cb
->args
[1];
4218 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
4220 head
= &net
->dev_index_head
[h
];
4221 hlist_for_each_entry_rcu(dev
, node
, head
, index_hlist
) {
4224 idev
= __in6_dev_get(dev
);
4227 if (inet6_fill_ifinfo(skb
, idev
,
4228 NETLINK_CB(cb
->skb
).portid
,
4230 RTM_NEWLINK
, NLM_F_MULTI
) <= 0)
4244 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
4246 struct sk_buff
*skb
;
4247 struct net
*net
= dev_net(idev
->dev
);
4250 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
4254 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
4256 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
4257 WARN_ON(err
== -EMSGSIZE
);
4261 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFINFO
, NULL
, GFP_ATOMIC
);
4265 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFINFO
, err
);
4268 static inline size_t inet6_prefix_nlmsg_size(void)
4270 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
4271 + nla_total_size(sizeof(struct in6_addr
))
4272 + nla_total_size(sizeof(struct prefix_cacheinfo
));
4275 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
4276 struct prefix_info
*pinfo
, u32 portid
, u32 seq
,
4277 int event
, unsigned int flags
)
4279 struct prefixmsg
*pmsg
;
4280 struct nlmsghdr
*nlh
;
4281 struct prefix_cacheinfo ci
;
4283 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*pmsg
), flags
);
4287 pmsg
= nlmsg_data(nlh
);
4288 pmsg
->prefix_family
= AF_INET6
;
4289 pmsg
->prefix_pad1
= 0;
4290 pmsg
->prefix_pad2
= 0;
4291 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
4292 pmsg
->prefix_len
= pinfo
->prefix_len
;
4293 pmsg
->prefix_type
= pinfo
->type
;
4294 pmsg
->prefix_pad3
= 0;
4295 pmsg
->prefix_flags
= 0;
4297 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
4298 if (pinfo
->autoconf
)
4299 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
4301 if (nla_put(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
))
4302 goto nla_put_failure
;
4303 ci
.preferred_time
= ntohl(pinfo
->prefered
);
4304 ci
.valid_time
= ntohl(pinfo
->valid
);
4305 if (nla_put(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
))
4306 goto nla_put_failure
;
4307 return nlmsg_end(skb
, nlh
);
4310 nlmsg_cancel(skb
, nlh
);
4314 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
4315 struct prefix_info
*pinfo
)
4317 struct sk_buff
*skb
;
4318 struct net
*net
= dev_net(idev
->dev
);
4321 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
4325 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
4327 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
4328 WARN_ON(err
== -EMSGSIZE
);
4332 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
4336 rtnl_set_sk_err(net
, RTNLGRP_IPV6_PREFIX
, err
);
4339 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
4341 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
4346 * If the address was optimistic
4347 * we inserted the route at the start of
4348 * our DAD process, so we don't need
4351 if (!(ifp
->rt
->rt6i_node
))
4352 ip6_ins_rt(ifp
->rt
);
4353 if (ifp
->idev
->cnf
.forwarding
)
4354 addrconf_join_anycast(ifp
);
4357 if (ifp
->idev
->cnf
.forwarding
)
4358 addrconf_leave_anycast(ifp
);
4359 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
4360 dst_hold(&ifp
->rt
->dst
);
4362 if (ip6_del_rt(ifp
->rt
))
4363 dst_free(&ifp
->rt
->dst
);
4368 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
4371 if (likely(ifp
->idev
->dead
== 0))
4372 __ipv6_ifa_notify(event
, ifp
);
4373 rcu_read_unlock_bh();
4376 #ifdef CONFIG_SYSCTL
4379 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
,
4380 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4382 int *valp
= ctl
->data
;
4389 * ctl->data points to idev->cnf.forwarding, we should
4390 * not modify it until we get the rtnl lock.
4395 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
4398 ret
= addrconf_fixup_forwarding(ctl
, valp
, val
);
4404 static void dev_disable_change(struct inet6_dev
*idev
)
4406 if (!idev
|| !idev
->dev
)
4409 if (idev
->cnf
.disable_ipv6
)
4410 addrconf_notify(NULL
, NETDEV_DOWN
, idev
->dev
);
4412 addrconf_notify(NULL
, NETDEV_UP
, idev
->dev
);
4415 static void addrconf_disable_change(struct net
*net
, __s32 newf
)
4417 struct net_device
*dev
;
4418 struct inet6_dev
*idev
;
4421 for_each_netdev_rcu(net
, dev
) {
4422 idev
= __in6_dev_get(dev
);
4424 int changed
= (!idev
->cnf
.disable_ipv6
) ^ (!newf
);
4425 idev
->cnf
.disable_ipv6
= newf
;
4427 dev_disable_change(idev
);
4433 static int addrconf_disable_ipv6(struct ctl_table
*table
, int *p
, int newf
)
4438 if (!rtnl_trylock())
4439 return restart_syscall();
4441 net
= (struct net
*)table
->extra2
;
4445 if (p
== &net
->ipv6
.devconf_dflt
->disable_ipv6
) {
4450 if (p
== &net
->ipv6
.devconf_all
->disable_ipv6
) {
4451 net
->ipv6
.devconf_dflt
->disable_ipv6
= newf
;
4452 addrconf_disable_change(net
, newf
);
4453 } else if ((!newf
) ^ (!old
))
4454 dev_disable_change((struct inet6_dev
*)table
->extra1
);
4461 int addrconf_sysctl_disable(ctl_table
*ctl
, int write
,
4462 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4464 int *valp
= ctl
->data
;
4471 * ctl->data points to idev->cnf.disable_ipv6, we should
4472 * not modify it until we get the rtnl lock.
4477 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
4480 ret
= addrconf_disable_ipv6(ctl
, valp
, val
);
4486 static struct addrconf_sysctl_table
4488 struct ctl_table_header
*sysctl_header
;
4489 ctl_table addrconf_vars
[DEVCONF_MAX
+1];
4490 } addrconf_sysctl __read_mostly
= {
4491 .sysctl_header
= NULL
,
4494 .procname
= "forwarding",
4495 .data
= &ipv6_devconf
.forwarding
,
4496 .maxlen
= sizeof(int),
4498 .proc_handler
= addrconf_sysctl_forward
,
4501 .procname
= "hop_limit",
4502 .data
= &ipv6_devconf
.hop_limit
,
4503 .maxlen
= sizeof(int),
4505 .proc_handler
= proc_dointvec
,
4509 .data
= &ipv6_devconf
.mtu6
,
4510 .maxlen
= sizeof(int),
4512 .proc_handler
= proc_dointvec
,
4515 .procname
= "accept_ra",
4516 .data
= &ipv6_devconf
.accept_ra
,
4517 .maxlen
= sizeof(int),
4519 .proc_handler
= proc_dointvec
,
4522 .procname
= "accept_redirects",
4523 .data
= &ipv6_devconf
.accept_redirects
,
4524 .maxlen
= sizeof(int),
4526 .proc_handler
= proc_dointvec
,
4529 .procname
= "autoconf",
4530 .data
= &ipv6_devconf
.autoconf
,
4531 .maxlen
= sizeof(int),
4533 .proc_handler
= proc_dointvec
,
4536 .procname
= "dad_transmits",
4537 .data
= &ipv6_devconf
.dad_transmits
,
4538 .maxlen
= sizeof(int),
4540 .proc_handler
= proc_dointvec
,
4543 .procname
= "router_solicitations",
4544 .data
= &ipv6_devconf
.rtr_solicits
,
4545 .maxlen
= sizeof(int),
4547 .proc_handler
= proc_dointvec
,
4550 .procname
= "router_solicitation_interval",
4551 .data
= &ipv6_devconf
.rtr_solicit_interval
,
4552 .maxlen
= sizeof(int),
4554 .proc_handler
= proc_dointvec_jiffies
,
4557 .procname
= "router_solicitation_delay",
4558 .data
= &ipv6_devconf
.rtr_solicit_delay
,
4559 .maxlen
= sizeof(int),
4561 .proc_handler
= proc_dointvec_jiffies
,
4564 .procname
= "force_mld_version",
4565 .data
= &ipv6_devconf
.force_mld_version
,
4566 .maxlen
= sizeof(int),
4568 .proc_handler
= proc_dointvec
,
4570 #ifdef CONFIG_IPV6_PRIVACY
4572 .procname
= "use_tempaddr",
4573 .data
= &ipv6_devconf
.use_tempaddr
,
4574 .maxlen
= sizeof(int),
4576 .proc_handler
= proc_dointvec
,
4579 .procname
= "temp_valid_lft",
4580 .data
= &ipv6_devconf
.temp_valid_lft
,
4581 .maxlen
= sizeof(int),
4583 .proc_handler
= proc_dointvec
,
4586 .procname
= "temp_prefered_lft",
4587 .data
= &ipv6_devconf
.temp_prefered_lft
,
4588 .maxlen
= sizeof(int),
4590 .proc_handler
= proc_dointvec
,
4593 .procname
= "regen_max_retry",
4594 .data
= &ipv6_devconf
.regen_max_retry
,
4595 .maxlen
= sizeof(int),
4597 .proc_handler
= proc_dointvec
,
4600 .procname
= "max_desync_factor",
4601 .data
= &ipv6_devconf
.max_desync_factor
,
4602 .maxlen
= sizeof(int),
4604 .proc_handler
= proc_dointvec
,
4608 .procname
= "max_addresses",
4609 .data
= &ipv6_devconf
.max_addresses
,
4610 .maxlen
= sizeof(int),
4612 .proc_handler
= proc_dointvec
,
4615 .procname
= "accept_ra_defrtr",
4616 .data
= &ipv6_devconf
.accept_ra_defrtr
,
4617 .maxlen
= sizeof(int),
4619 .proc_handler
= proc_dointvec
,
4622 .procname
= "accept_ra_pinfo",
4623 .data
= &ipv6_devconf
.accept_ra_pinfo
,
4624 .maxlen
= sizeof(int),
4626 .proc_handler
= proc_dointvec
,
4628 #ifdef CONFIG_IPV6_ROUTER_PREF
4630 .procname
= "accept_ra_rtr_pref",
4631 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
4632 .maxlen
= sizeof(int),
4634 .proc_handler
= proc_dointvec
,
4637 .procname
= "router_probe_interval",
4638 .data
= &ipv6_devconf
.rtr_probe_interval
,
4639 .maxlen
= sizeof(int),
4641 .proc_handler
= proc_dointvec_jiffies
,
4643 #ifdef CONFIG_IPV6_ROUTE_INFO
4645 .procname
= "accept_ra_rt_info_max_plen",
4646 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
4647 .maxlen
= sizeof(int),
4649 .proc_handler
= proc_dointvec
,
4654 .procname
= "proxy_ndp",
4655 .data
= &ipv6_devconf
.proxy_ndp
,
4656 .maxlen
= sizeof(int),
4658 .proc_handler
= proc_dointvec
,
4661 .procname
= "accept_source_route",
4662 .data
= &ipv6_devconf
.accept_source_route
,
4663 .maxlen
= sizeof(int),
4665 .proc_handler
= proc_dointvec
,
4667 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4669 .procname
= "optimistic_dad",
4670 .data
= &ipv6_devconf
.optimistic_dad
,
4671 .maxlen
= sizeof(int),
4673 .proc_handler
= proc_dointvec
,
4677 #ifdef CONFIG_IPV6_MROUTE
4679 .procname
= "mc_forwarding",
4680 .data
= &ipv6_devconf
.mc_forwarding
,
4681 .maxlen
= sizeof(int),
4683 .proc_handler
= proc_dointvec
,
4687 .procname
= "disable_ipv6",
4688 .data
= &ipv6_devconf
.disable_ipv6
,
4689 .maxlen
= sizeof(int),
4691 .proc_handler
= addrconf_sysctl_disable
,
4694 .procname
= "accept_dad",
4695 .data
= &ipv6_devconf
.accept_dad
,
4696 .maxlen
= sizeof(int),
4698 .proc_handler
= proc_dointvec
,
4701 .procname
= "force_tllao",
4702 .data
= &ipv6_devconf
.force_tllao
,
4703 .maxlen
= sizeof(int),
4705 .proc_handler
= proc_dointvec
4708 .procname
= "ndisc_notify",
4709 .data
= &ipv6_devconf
.ndisc_notify
,
4710 .maxlen
= sizeof(int),
4712 .proc_handler
= proc_dointvec
4720 static int __addrconf_sysctl_register(struct net
*net
, char *dev_name
,
4721 struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
4724 struct addrconf_sysctl_table
*t
;
4725 char path
[sizeof("net/ipv6/conf/") + IFNAMSIZ
];
4727 t
= kmemdup(&addrconf_sysctl
, sizeof(*t
), GFP_KERNEL
);
4731 for (i
= 0; t
->addrconf_vars
[i
].data
; i
++) {
4732 t
->addrconf_vars
[i
].data
+= (char *)p
- (char *)&ipv6_devconf
;
4733 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
4734 t
->addrconf_vars
[i
].extra2
= net
;
4737 snprintf(path
, sizeof(path
), "net/ipv6/conf/%s", dev_name
);
4739 t
->sysctl_header
= register_net_sysctl(net
, path
, t
->addrconf_vars
);
4740 if (t
->sysctl_header
== NULL
)
4752 static void __addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
4754 struct addrconf_sysctl_table
*t
;
4756 if (p
->sysctl
== NULL
)
4761 unregister_net_sysctl_table(t
->sysctl_header
);
4765 static void addrconf_sysctl_register(struct inet6_dev
*idev
)
4767 neigh_sysctl_register(idev
->dev
, idev
->nd_parms
, "ipv6",
4768 &ndisc_ifinfo_sysctl_change
);
4769 __addrconf_sysctl_register(dev_net(idev
->dev
), idev
->dev
->name
,
4773 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
4775 __addrconf_sysctl_unregister(&idev
->cnf
);
4776 neigh_sysctl_unregister(idev
->nd_parms
);
4782 static int __net_init
addrconf_init_net(struct net
*net
)
4785 struct ipv6_devconf
*all
, *dflt
;
4788 all
= &ipv6_devconf
;
4789 dflt
= &ipv6_devconf_dflt
;
4791 if (!net_eq(net
, &init_net
)) {
4792 all
= kmemdup(all
, sizeof(ipv6_devconf
), GFP_KERNEL
);
4796 dflt
= kmemdup(dflt
, sizeof(ipv6_devconf_dflt
), GFP_KERNEL
);
4798 goto err_alloc_dflt
;
4800 /* these will be inherited by all namespaces */
4801 dflt
->autoconf
= ipv6_defaults
.autoconf
;
4802 dflt
->disable_ipv6
= ipv6_defaults
.disable_ipv6
;
4805 net
->ipv6
.devconf_all
= all
;
4806 net
->ipv6
.devconf_dflt
= dflt
;
4808 #ifdef CONFIG_SYSCTL
4809 err
= __addrconf_sysctl_register(net
, "all", NULL
, all
);
4813 err
= __addrconf_sysctl_register(net
, "default", NULL
, dflt
);
4819 #ifdef CONFIG_SYSCTL
4821 __addrconf_sysctl_unregister(all
);
4831 static void __net_exit
addrconf_exit_net(struct net
*net
)
4833 #ifdef CONFIG_SYSCTL
4834 __addrconf_sysctl_unregister(net
->ipv6
.devconf_dflt
);
4835 __addrconf_sysctl_unregister(net
->ipv6
.devconf_all
);
4837 if (!net_eq(net
, &init_net
)) {
4838 kfree(net
->ipv6
.devconf_dflt
);
4839 kfree(net
->ipv6
.devconf_all
);
4843 static struct pernet_operations addrconf_ops
= {
4844 .init
= addrconf_init_net
,
4845 .exit
= addrconf_exit_net
,
4852 int register_inet6addr_notifier(struct notifier_block
*nb
)
4854 return atomic_notifier_chain_register(&inet6addr_chain
, nb
);
4856 EXPORT_SYMBOL(register_inet6addr_notifier
);
4858 int unregister_inet6addr_notifier(struct notifier_block
*nb
)
4860 return atomic_notifier_chain_unregister(&inet6addr_chain
, nb
);
4862 EXPORT_SYMBOL(unregister_inet6addr_notifier
);
4864 static struct rtnl_af_ops inet6_ops
= {
4866 .fill_link_af
= inet6_fill_link_af
,
4867 .get_link_af_size
= inet6_get_link_af_size
,
4871 * Init / cleanup code
4874 int __init
addrconf_init(void)
4878 err
= ipv6_addr_label_init();
4880 pr_crit("%s: cannot initialize default policy table: %d\n",
4885 err
= register_pernet_subsys(&addrconf_ops
);
4889 /* The addrconf netdev notifier requires that loopback_dev
4890 * has it's ipv6 private information allocated and setup
4891 * before it can bring up and give link-local addresses
4892 * to other devices which are up.
4894 * Unfortunately, loopback_dev is not necessarily the first
4895 * entry in the global dev_base list of net devices. In fact,
4896 * it is likely to be the very last entry on that list.
4897 * So this causes the notifier registry below to try and
4898 * give link-local addresses to all devices besides loopback_dev
4899 * first, then loopback_dev, which cases all the non-loopback_dev
4900 * devices to fail to get a link-local address.
4902 * So, as a temporary fix, allocate the ipv6 structure for
4903 * loopback_dev first by hand.
4904 * Longer term, all of the dependencies ipv6 has upon the loopback
4905 * device and it being up should be removed.
4908 if (!ipv6_add_dev(init_net
.loopback_dev
))
4914 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
4915 INIT_HLIST_HEAD(&inet6_addr_lst
[i
]);
4917 register_netdevice_notifier(&ipv6_dev_notf
);
4921 err
= rtnl_af_register(&inet6_ops
);
4925 err
= __rtnl_register(PF_INET6
, RTM_GETLINK
, NULL
, inet6_dump_ifinfo
,
4930 /* Only the first call to __rtnl_register can fail */
4931 __rtnl_register(PF_INET6
, RTM_NEWADDR
, inet6_rtm_newaddr
, NULL
, NULL
);
4932 __rtnl_register(PF_INET6
, RTM_DELADDR
, inet6_rtm_deladdr
, NULL
, NULL
);
4933 __rtnl_register(PF_INET6
, RTM_GETADDR
, inet6_rtm_getaddr
,
4934 inet6_dump_ifaddr
, NULL
);
4935 __rtnl_register(PF_INET6
, RTM_GETMULTICAST
, NULL
,
4936 inet6_dump_ifmcaddr
, NULL
);
4937 __rtnl_register(PF_INET6
, RTM_GETANYCAST
, NULL
,
4938 inet6_dump_ifacaddr
, NULL
);
4939 __rtnl_register(PF_INET6
, RTM_GETNETCONF
, inet6_netconf_get_devconf
,
4942 ipv6_addr_label_rtnl_register();
4946 rtnl_af_unregister(&inet6_ops
);
4948 unregister_netdevice_notifier(&ipv6_dev_notf
);
4950 unregister_pernet_subsys(&addrconf_ops
);
4952 ipv6_addr_label_cleanup();
4957 void addrconf_cleanup(void)
4959 struct net_device
*dev
;
4962 unregister_netdevice_notifier(&ipv6_dev_notf
);
4963 unregister_pernet_subsys(&addrconf_ops
);
4964 ipv6_addr_label_cleanup();
4968 __rtnl_af_unregister(&inet6_ops
);
4970 /* clean dev list */
4971 for_each_netdev(&init_net
, dev
) {
4972 if (__in6_dev_get(dev
) == NULL
)
4974 addrconf_ifdown(dev
, 1);
4976 addrconf_ifdown(init_net
.loopback_dev
, 2);
4981 spin_lock_bh(&addrconf_hash_lock
);
4982 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
4983 WARN_ON(!hlist_empty(&inet6_addr_lst
[i
]));
4984 spin_unlock_bh(&addrconf_hash_lock
);
4986 del_timer(&addr_chk_timer
);