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 struct rt6_info
*addrconf_get_prefix_route(const struct in6_addr
*pfx
,
159 const struct net_device
*dev
,
160 u32 flags
, u32 noflags
);
162 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
);
163 static void addrconf_dad_timer(unsigned long data
);
164 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
);
165 static void addrconf_dad_run(struct inet6_dev
*idev
);
166 static void addrconf_rs_timer(unsigned long data
);
167 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
168 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
170 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
171 struct prefix_info
*pinfo
);
172 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
173 struct net_device
*dev
);
175 static ATOMIC_NOTIFIER_HEAD(inet6addr_chain
);
177 static struct ipv6_devconf ipv6_devconf __read_mostly
= {
179 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
180 .mtu6
= IPV6_MIN_MTU
,
182 .accept_redirects
= 1,
184 .force_mld_version
= 0,
186 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
187 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
188 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
189 #ifdef CONFIG_IPV6_PRIVACY
191 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
192 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
193 .regen_max_retry
= REGEN_MAX_RETRY
,
194 .max_desync_factor
= MAX_DESYNC_FACTOR
,
196 .max_addresses
= IPV6_MAX_ADDRESSES
,
197 .accept_ra_defrtr
= 1,
198 .accept_ra_pinfo
= 1,
199 #ifdef CONFIG_IPV6_ROUTER_PREF
200 .accept_ra_rtr_pref
= 1,
201 .rtr_probe_interval
= 60 * HZ
,
202 #ifdef CONFIG_IPV6_ROUTE_INFO
203 .accept_ra_rt_info_max_plen
= 0,
207 .accept_source_route
= 0, /* we do not accept RH0 by default. */
212 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly
= {
214 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
215 .mtu6
= IPV6_MIN_MTU
,
217 .accept_redirects
= 1,
220 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
221 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
222 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
223 #ifdef CONFIG_IPV6_PRIVACY
225 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
226 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
227 .regen_max_retry
= REGEN_MAX_RETRY
,
228 .max_desync_factor
= MAX_DESYNC_FACTOR
,
230 .max_addresses
= IPV6_MAX_ADDRESSES
,
231 .accept_ra_defrtr
= 1,
232 .accept_ra_pinfo
= 1,
233 #ifdef CONFIG_IPV6_ROUTER_PREF
234 .accept_ra_rtr_pref
= 1,
235 .rtr_probe_interval
= 60 * HZ
,
236 #ifdef CONFIG_IPV6_ROUTE_INFO
237 .accept_ra_rt_info_max_plen
= 0,
241 .accept_source_route
= 0, /* we do not accept RH0 by default. */
246 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
247 const struct in6_addr in6addr_any
= IN6ADDR_ANY_INIT
;
248 const struct in6_addr in6addr_loopback
= IN6ADDR_LOOPBACK_INIT
;
249 const struct in6_addr in6addr_linklocal_allnodes
= IN6ADDR_LINKLOCAL_ALLNODES_INIT
;
250 const struct in6_addr in6addr_linklocal_allrouters
= IN6ADDR_LINKLOCAL_ALLROUTERS_INIT
;
252 /* Check if a valid qdisc is available */
253 static inline bool addrconf_qdisc_ok(const struct net_device
*dev
)
255 return !qdisc_tx_is_noop(dev
);
258 static void addrconf_del_timer(struct inet6_ifaddr
*ifp
)
260 if (del_timer(&ifp
->timer
))
264 enum addrconf_timer_t
{
270 static void addrconf_mod_timer(struct inet6_ifaddr
*ifp
,
271 enum addrconf_timer_t what
,
274 if (!del_timer(&ifp
->timer
))
279 ifp
->timer
.function
= addrconf_dad_timer
;
282 ifp
->timer
.function
= addrconf_rs_timer
;
287 ifp
->timer
.expires
= jiffies
+ when
;
288 add_timer(&ifp
->timer
);
291 static int snmp6_alloc_dev(struct inet6_dev
*idev
)
293 if (snmp_mib_init((void __percpu
**)idev
->stats
.ipv6
,
294 sizeof(struct ipstats_mib
),
295 __alignof__(struct ipstats_mib
)) < 0)
297 idev
->stats
.icmpv6dev
= kzalloc(sizeof(struct icmpv6_mib_device
),
299 if (!idev
->stats
.icmpv6dev
)
301 idev
->stats
.icmpv6msgdev
= kzalloc(sizeof(struct icmpv6msg_mib_device
),
303 if (!idev
->stats
.icmpv6msgdev
)
309 kfree(idev
->stats
.icmpv6dev
);
311 snmp_mib_free((void __percpu
**)idev
->stats
.ipv6
);
316 static void snmp6_free_dev(struct inet6_dev
*idev
)
318 kfree(idev
->stats
.icmpv6msgdev
);
319 kfree(idev
->stats
.icmpv6dev
);
320 snmp_mib_free((void __percpu
**)idev
->stats
.ipv6
);
323 /* Nobody refers to this device, we may destroy it. */
325 void in6_dev_finish_destroy(struct inet6_dev
*idev
)
327 struct net_device
*dev
= idev
->dev
;
329 WARN_ON(!list_empty(&idev
->addr_list
));
330 WARN_ON(idev
->mc_list
!= NULL
);
332 #ifdef NET_REFCNT_DEBUG
333 pr_debug("%s: %s\n", __func__
, dev
? dev
->name
: "NIL");
337 pr_warn("Freeing alive inet6 device %p\n", idev
);
340 snmp6_free_dev(idev
);
341 kfree_rcu(idev
, rcu
);
343 EXPORT_SYMBOL(in6_dev_finish_destroy
);
345 static struct inet6_dev
*ipv6_add_dev(struct net_device
*dev
)
347 struct inet6_dev
*ndev
;
351 if (dev
->mtu
< IPV6_MIN_MTU
)
354 ndev
= kzalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
359 rwlock_init(&ndev
->lock
);
361 INIT_LIST_HEAD(&ndev
->addr_list
);
363 memcpy(&ndev
->cnf
, dev_net(dev
)->ipv6
.devconf_dflt
, sizeof(ndev
->cnf
));
364 ndev
->cnf
.mtu6
= dev
->mtu
;
365 ndev
->cnf
.sysctl
= NULL
;
366 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
367 if (ndev
->nd_parms
== NULL
) {
371 if (ndev
->cnf
.forwarding
)
372 dev_disable_lro(dev
);
373 /* We refer to the device */
376 if (snmp6_alloc_dev(ndev
) < 0) {
378 "%s: cannot allocate memory for statistics; dev=%s.\n",
379 __func__
, dev
->name
));
380 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
386 if (snmp6_register_dev(ndev
) < 0) {
388 "%s: cannot create /proc/net/dev_snmp6/%s\n",
389 __func__
, dev
->name
));
390 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
392 in6_dev_finish_destroy(ndev
);
396 /* One reference from device. We must do this before
397 * we invoke __ipv6_regen_rndid().
401 if (dev
->flags
& (IFF_NOARP
| IFF_LOOPBACK
))
402 ndev
->cnf
.accept_dad
= -1;
404 #if IS_ENABLED(CONFIG_IPV6_SIT)
405 if (dev
->type
== ARPHRD_SIT
&& (dev
->priv_flags
& IFF_ISATAP
)) {
406 pr_info("%s: Disabled Multicast RS\n", dev
->name
);
407 ndev
->cnf
.rtr_solicits
= 0;
411 #ifdef CONFIG_IPV6_PRIVACY
412 INIT_LIST_HEAD(&ndev
->tempaddr_list
);
413 setup_timer(&ndev
->regen_timer
, ipv6_regen_rndid
, (unsigned long)ndev
);
414 if ((dev
->flags
&IFF_LOOPBACK
) ||
415 dev
->type
== ARPHRD_TUNNEL
||
416 dev
->type
== ARPHRD_TUNNEL6
||
417 dev
->type
== ARPHRD_SIT
||
418 dev
->type
== ARPHRD_NONE
) {
419 ndev
->cnf
.use_tempaddr
= -1;
422 ipv6_regen_rndid((unsigned long) ndev
);
426 if (netif_running(dev
) && addrconf_qdisc_ok(dev
))
427 ndev
->if_flags
|= IF_READY
;
429 ipv6_mc_init_dev(ndev
);
430 ndev
->tstamp
= jiffies
;
431 addrconf_sysctl_register(ndev
);
432 /* protected by rtnl_lock */
433 rcu_assign_pointer(dev
->ip6_ptr
, ndev
);
435 /* Join all-node multicast group */
436 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allnodes
);
438 /* Join all-router multicast group if forwarding is set */
439 if (ndev
->cnf
.forwarding
&& (dev
->flags
& IFF_MULTICAST
))
440 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
445 static struct inet6_dev
*ipv6_find_idev(struct net_device
*dev
)
447 struct inet6_dev
*idev
;
451 idev
= __in6_dev_get(dev
);
453 idev
= ipv6_add_dev(dev
);
458 if (dev
->flags
&IFF_UP
)
463 static int inet6_netconf_msgsize_devconf(int type
)
465 int size
= NLMSG_ALIGN(sizeof(struct netconfmsg
))
466 + nla_total_size(4); /* NETCONFA_IFINDEX */
468 /* type -1 is used for ALL */
469 if (type
== -1 || type
== NETCONFA_FORWARDING
)
470 size
+= nla_total_size(4);
471 #ifdef CONFIG_IPV6_MROUTE
472 if (type
== -1 || type
== NETCONFA_MC_FORWARDING
)
473 size
+= nla_total_size(4);
479 static int inet6_netconf_fill_devconf(struct sk_buff
*skb
, int ifindex
,
480 struct ipv6_devconf
*devconf
, u32 portid
,
481 u32 seq
, int event
, unsigned int flags
,
484 struct nlmsghdr
*nlh
;
485 struct netconfmsg
*ncm
;
487 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct netconfmsg
),
492 ncm
= nlmsg_data(nlh
);
493 ncm
->ncm_family
= AF_INET6
;
495 if (nla_put_s32(skb
, NETCONFA_IFINDEX
, ifindex
) < 0)
496 goto nla_put_failure
;
498 /* type -1 is used for ALL */
499 if ((type
== -1 || type
== NETCONFA_FORWARDING
) &&
500 nla_put_s32(skb
, NETCONFA_FORWARDING
, devconf
->forwarding
) < 0)
501 goto nla_put_failure
;
502 #ifdef CONFIG_IPV6_MROUTE
503 if ((type
== -1 || type
== NETCONFA_MC_FORWARDING
) &&
504 nla_put_s32(skb
, NETCONFA_MC_FORWARDING
,
505 devconf
->mc_forwarding
) < 0)
506 goto nla_put_failure
;
508 return nlmsg_end(skb
, nlh
);
511 nlmsg_cancel(skb
, nlh
);
515 void inet6_netconf_notify_devconf(struct net
*net
, int type
, int ifindex
,
516 struct ipv6_devconf
*devconf
)
521 skb
= nlmsg_new(inet6_netconf_msgsize_devconf(type
), GFP_ATOMIC
);
525 err
= inet6_netconf_fill_devconf(skb
, ifindex
, devconf
, 0, 0,
526 RTM_NEWNETCONF
, 0, type
);
528 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
529 WARN_ON(err
== -EMSGSIZE
);
533 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_NETCONF
, NULL
, GFP_ATOMIC
);
536 rtnl_set_sk_err(net
, RTNLGRP_IPV6_NETCONF
, err
);
539 static const struct nla_policy devconf_ipv6_policy
[NETCONFA_MAX
+1] = {
540 [NETCONFA_IFINDEX
] = { .len
= sizeof(int) },
541 [NETCONFA_FORWARDING
] = { .len
= sizeof(int) },
544 static int inet6_netconf_get_devconf(struct sk_buff
*in_skb
,
545 struct nlmsghdr
*nlh
,
548 struct net
*net
= sock_net(in_skb
->sk
);
549 struct nlattr
*tb
[NETCONFA_MAX
+1];
550 struct netconfmsg
*ncm
;
552 struct ipv6_devconf
*devconf
;
553 struct inet6_dev
*in6_dev
;
554 struct net_device
*dev
;
558 err
= nlmsg_parse(nlh
, sizeof(*ncm
), tb
, NETCONFA_MAX
,
559 devconf_ipv6_policy
);
564 if (!tb
[NETCONFA_IFINDEX
])
567 ifindex
= nla_get_s32(tb
[NETCONFA_IFINDEX
]);
569 case NETCONFA_IFINDEX_ALL
:
570 devconf
= net
->ipv6
.devconf_all
;
572 case NETCONFA_IFINDEX_DEFAULT
:
573 devconf
= net
->ipv6
.devconf_dflt
;
576 dev
= __dev_get_by_index(net
, ifindex
);
579 in6_dev
= __in6_dev_get(dev
);
582 devconf
= &in6_dev
->cnf
;
587 skb
= nlmsg_new(inet6_netconf_msgsize_devconf(-1), GFP_ATOMIC
);
591 err
= inet6_netconf_fill_devconf(skb
, ifindex
, devconf
,
592 NETLINK_CB(in_skb
).portid
,
593 nlh
->nlmsg_seq
, RTM_NEWNETCONF
, 0,
596 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
597 WARN_ON(err
== -EMSGSIZE
);
601 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).portid
);
607 static void dev_forward_change(struct inet6_dev
*idev
)
609 struct net_device
*dev
;
610 struct inet6_ifaddr
*ifa
;
615 if (idev
->cnf
.forwarding
)
616 dev_disable_lro(dev
);
617 if (dev
->flags
& IFF_MULTICAST
) {
618 if (idev
->cnf
.forwarding
)
619 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
621 ipv6_dev_mc_dec(dev
, &in6addr_linklocal_allrouters
);
624 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
625 if (ifa
->flags
&IFA_F_TENTATIVE
)
627 if (idev
->cnf
.forwarding
)
628 addrconf_join_anycast(ifa
);
630 addrconf_leave_anycast(ifa
);
632 inet6_netconf_notify_devconf(dev_net(dev
), NETCONFA_FORWARDING
,
633 dev
->ifindex
, &idev
->cnf
);
637 static void addrconf_forward_change(struct net
*net
, __s32 newf
)
639 struct net_device
*dev
;
640 struct inet6_dev
*idev
;
642 for_each_netdev(net
, dev
) {
643 idev
= __in6_dev_get(dev
);
645 int changed
= (!idev
->cnf
.forwarding
) ^ (!newf
);
646 idev
->cnf
.forwarding
= newf
;
648 dev_forward_change(idev
);
653 static int addrconf_fixup_forwarding(struct ctl_table
*table
, int *p
, int newf
)
659 return restart_syscall();
661 net
= (struct net
*)table
->extra2
;
665 if (p
== &net
->ipv6
.devconf_dflt
->forwarding
) {
666 if ((!newf
) ^ (!old
))
667 inet6_netconf_notify_devconf(net
, NETCONFA_FORWARDING
,
668 NETCONFA_IFINDEX_DEFAULT
,
669 net
->ipv6
.devconf_dflt
);
674 if (p
== &net
->ipv6
.devconf_all
->forwarding
) {
675 net
->ipv6
.devconf_dflt
->forwarding
= newf
;
676 addrconf_forward_change(net
, newf
);
677 if ((!newf
) ^ (!old
))
678 inet6_netconf_notify_devconf(net
, NETCONFA_FORWARDING
,
679 NETCONFA_IFINDEX_ALL
,
680 net
->ipv6
.devconf_all
);
681 } else if ((!newf
) ^ (!old
))
682 dev_forward_change((struct inet6_dev
*)table
->extra1
);
686 rt6_purge_dflt_routers(net
);
691 /* Nobody refers to this ifaddr, destroy it */
692 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
694 WARN_ON(!hlist_unhashed(&ifp
->addr_lst
));
696 #ifdef NET_REFCNT_DEBUG
697 pr_debug("%s\n", __func__
);
700 in6_dev_put(ifp
->idev
);
702 if (del_timer(&ifp
->timer
))
703 pr_notice("Timer is still running, when freeing ifa=%p\n", ifp
);
705 if (ifp
->state
!= INET6_IFADDR_STATE_DEAD
) {
706 pr_warn("Freeing alive inet6 address %p\n", ifp
);
715 ipv6_link_dev_addr(struct inet6_dev
*idev
, struct inet6_ifaddr
*ifp
)
718 int ifp_scope
= ipv6_addr_src_scope(&ifp
->addr
);
721 * Each device address list is sorted in order of scope -
722 * global before linklocal.
724 list_for_each(p
, &idev
->addr_list
) {
725 struct inet6_ifaddr
*ifa
726 = list_entry(p
, struct inet6_ifaddr
, if_list
);
727 if (ifp_scope
>= ipv6_addr_src_scope(&ifa
->addr
))
731 list_add_tail(&ifp
->if_list
, p
);
734 static u32
inet6_addr_hash(const struct in6_addr
*addr
)
736 return hash_32(ipv6_addr_hash(addr
), IN6_ADDR_HSIZE_SHIFT
);
739 /* On success it returns ifp with increased reference count */
741 static struct inet6_ifaddr
*
742 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
, int pfxlen
,
743 int scope
, u32 flags
)
745 struct inet6_ifaddr
*ifa
= NULL
;
749 int addr_type
= ipv6_addr_type(addr
);
751 if (addr_type
== IPV6_ADDR_ANY
||
752 addr_type
& IPV6_ADDR_MULTICAST
||
753 (!(idev
->dev
->flags
& IFF_LOOPBACK
) &&
754 addr_type
& IPV6_ADDR_LOOPBACK
))
755 return ERR_PTR(-EADDRNOTAVAIL
);
759 err
= -ENODEV
; /*XXX*/
763 if (idev
->cnf
.disable_ipv6
) {
768 spin_lock(&addrconf_hash_lock
);
770 /* Ignore adding duplicate addresses on an interface */
771 if (ipv6_chk_same_addr(dev_net(idev
->dev
), addr
, idev
->dev
)) {
772 ADBG(("ipv6_add_addr: already assigned\n"));
777 ifa
= kzalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
780 ADBG(("ipv6_add_addr: malloc failed\n"));
785 rt
= addrconf_dst_alloc(idev
, addr
, false);
793 spin_lock_init(&ifa
->lock
);
794 spin_lock_init(&ifa
->state_lock
);
795 init_timer(&ifa
->timer
);
796 INIT_HLIST_NODE(&ifa
->addr_lst
);
797 ifa
->timer
.data
= (unsigned long) ifa
;
799 ifa
->prefix_len
= pfxlen
;
800 ifa
->flags
= flags
| IFA_F_TENTATIVE
;
801 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
810 /* Add to big hash table */
811 hash
= inet6_addr_hash(addr
);
813 hlist_add_head_rcu(&ifa
->addr_lst
, &inet6_addr_lst
[hash
]);
814 spin_unlock(&addrconf_hash_lock
);
816 write_lock(&idev
->lock
);
817 /* Add to inet6_dev unicast addr list. */
818 ipv6_link_dev_addr(idev
, ifa
);
820 #ifdef CONFIG_IPV6_PRIVACY
821 if (ifa
->flags
&IFA_F_TEMPORARY
) {
822 list_add(&ifa
->tmp_list
, &idev
->tempaddr_list
);
828 write_unlock(&idev
->lock
);
830 rcu_read_unlock_bh();
832 if (likely(err
== 0))
833 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_UP
, ifa
);
841 spin_unlock(&addrconf_hash_lock
);
845 /* This function wants to get referenced ifp and releases it before return */
847 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
849 struct inet6_ifaddr
*ifa
, *ifn
;
850 struct inet6_dev
*idev
= ifp
->idev
;
852 int deleted
= 0, onlink
= 0;
853 unsigned long expires
= jiffies
;
855 spin_lock_bh(&ifp
->state_lock
);
857 ifp
->state
= INET6_IFADDR_STATE_DEAD
;
858 spin_unlock_bh(&ifp
->state_lock
);
860 if (state
== INET6_IFADDR_STATE_DEAD
)
863 spin_lock_bh(&addrconf_hash_lock
);
864 hlist_del_init_rcu(&ifp
->addr_lst
);
865 spin_unlock_bh(&addrconf_hash_lock
);
867 write_lock_bh(&idev
->lock
);
868 #ifdef CONFIG_IPV6_PRIVACY
869 if (ifp
->flags
&IFA_F_TEMPORARY
) {
870 list_del(&ifp
->tmp_list
);
872 in6_ifa_put(ifp
->ifpub
);
879 list_for_each_entry_safe(ifa
, ifn
, &idev
->addr_list
, if_list
) {
881 list_del_init(&ifp
->if_list
);
884 if (!(ifp
->flags
& IFA_F_PERMANENT
) || onlink
> 0)
888 } else if (ifp
->flags
& IFA_F_PERMANENT
) {
889 if (ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
891 if (ifa
->flags
& IFA_F_PERMANENT
) {
896 unsigned long lifetime
;
901 spin_lock(&ifa
->lock
);
903 lifetime
= addrconf_timeout_fixup(ifa
->valid_lft
, HZ
);
905 * Note: Because this address is
906 * not permanent, lifetime <
907 * LONG_MAX / HZ here.
909 if (time_before(expires
,
910 ifa
->tstamp
+ lifetime
* HZ
))
911 expires
= ifa
->tstamp
+ lifetime
* HZ
;
912 spin_unlock(&ifa
->lock
);
917 write_unlock_bh(&idev
->lock
);
919 addrconf_del_timer(ifp
);
921 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
923 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifp
);
926 * Purge or update corresponding prefix
928 * 1) we don't purge prefix here if address was not permanent.
929 * prefix is managed by its own lifetime.
930 * 2) if there're no addresses, delete prefix.
931 * 3) if there're still other permanent address(es),
932 * corresponding prefix is still permanent.
933 * 4) otherwise, update prefix lifetime to the
934 * longest valid lifetime among the corresponding
935 * addresses on the device.
936 * Note: subsequent RA will update lifetime.
940 if ((ifp
->flags
& IFA_F_PERMANENT
) && onlink
< 1) {
941 struct in6_addr prefix
;
944 ipv6_addr_prefix(&prefix
, &ifp
->addr
, ifp
->prefix_len
);
946 rt
= addrconf_get_prefix_route(&prefix
,
949 0, RTF_GATEWAY
| RTF_DEFAULT
);
955 } else if (!(rt
->rt6i_flags
& RTF_EXPIRES
)) {
956 rt6_set_expires(rt
, expires
);
962 /* clean up prefsrc entries */
963 rt6_remove_prefsrc(ifp
);
968 #ifdef CONFIG_IPV6_PRIVACY
969 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
971 struct inet6_dev
*idev
= ifp
->idev
;
972 struct in6_addr addr
, *tmpaddr
;
973 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_tstamp
, age
;
974 unsigned long regen_advance
;
979 unsigned long now
= jiffies
;
981 write_lock(&idev
->lock
);
983 spin_lock_bh(&ift
->lock
);
984 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
985 spin_unlock_bh(&ift
->lock
);
992 if (idev
->cnf
.use_tempaddr
<= 0) {
993 write_unlock(&idev
->lock
);
994 pr_info("%s: use_tempaddr is disabled\n", __func__
);
999 spin_lock_bh(&ifp
->lock
);
1000 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
1001 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
1002 spin_unlock_bh(&ifp
->lock
);
1003 write_unlock(&idev
->lock
);
1004 pr_warn("%s: regeneration time exceeded - disabled temporary address support\n",
1011 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
1012 __ipv6_try_regen_rndid(idev
, tmpaddr
);
1013 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
1014 age
= (now
- ifp
->tstamp
) / HZ
;
1015 tmp_valid_lft
= min_t(__u32
,
1017 idev
->cnf
.temp_valid_lft
+ age
);
1018 tmp_prefered_lft
= min_t(__u32
,
1020 idev
->cnf
.temp_prefered_lft
+ age
-
1021 idev
->cnf
.max_desync_factor
);
1022 tmp_plen
= ifp
->prefix_len
;
1023 max_addresses
= idev
->cnf
.max_addresses
;
1024 tmp_tstamp
= ifp
->tstamp
;
1025 spin_unlock_bh(&ifp
->lock
);
1027 regen_advance
= idev
->cnf
.regen_max_retry
*
1028 idev
->cnf
.dad_transmits
*
1029 idev
->nd_parms
->retrans_time
/ HZ
;
1030 write_unlock(&idev
->lock
);
1032 /* A temporary address is created only if this calculated Preferred
1033 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
1034 * an implementation must not create a temporary address with a zero
1035 * Preferred Lifetime.
1037 if (tmp_prefered_lft
<= regen_advance
) {
1044 addr_flags
= IFA_F_TEMPORARY
;
1045 /* set in addrconf_prefix_rcv() */
1046 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
1047 addr_flags
|= IFA_F_OPTIMISTIC
;
1049 ift
= !max_addresses
||
1050 ipv6_count_addresses(idev
) < max_addresses
?
1051 ipv6_add_addr(idev
, &addr
, tmp_plen
,
1052 ipv6_addr_type(&addr
)&IPV6_ADDR_SCOPE_MASK
,
1054 if (!ift
|| IS_ERR(ift
)) {
1057 pr_info("%s: retry temporary address regeneration\n", __func__
);
1059 write_lock(&idev
->lock
);
1063 spin_lock_bh(&ift
->lock
);
1065 ift
->valid_lft
= tmp_valid_lft
;
1066 ift
->prefered_lft
= tmp_prefered_lft
;
1068 ift
->tstamp
= tmp_tstamp
;
1069 spin_unlock_bh(&ift
->lock
);
1071 addrconf_dad_start(ift
);
1080 * Choose an appropriate source address (RFC3484)
1083 IPV6_SADDR_RULE_INIT
= 0,
1084 IPV6_SADDR_RULE_LOCAL
,
1085 IPV6_SADDR_RULE_SCOPE
,
1086 IPV6_SADDR_RULE_PREFERRED
,
1087 #ifdef CONFIG_IPV6_MIP6
1088 IPV6_SADDR_RULE_HOA
,
1090 IPV6_SADDR_RULE_OIF
,
1091 IPV6_SADDR_RULE_LABEL
,
1092 #ifdef CONFIG_IPV6_PRIVACY
1093 IPV6_SADDR_RULE_PRIVACY
,
1095 IPV6_SADDR_RULE_ORCHID
,
1096 IPV6_SADDR_RULE_PREFIX
,
1100 struct ipv6_saddr_score
{
1103 struct inet6_ifaddr
*ifa
;
1104 DECLARE_BITMAP(scorebits
, IPV6_SADDR_RULE_MAX
);
1109 struct ipv6_saddr_dst
{
1110 const struct in6_addr
*addr
;
1117 static inline int ipv6_saddr_preferred(int type
)
1119 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|IPV6_ADDR_LOOPBACK
))
1124 static int ipv6_get_saddr_eval(struct net
*net
,
1125 struct ipv6_saddr_score
*score
,
1126 struct ipv6_saddr_dst
*dst
,
1131 if (i
<= score
->rule
) {
1133 case IPV6_SADDR_RULE_SCOPE
:
1134 ret
= score
->scopedist
;
1136 case IPV6_SADDR_RULE_PREFIX
:
1137 ret
= score
->matchlen
;
1140 ret
= !!test_bit(i
, score
->scorebits
);
1146 case IPV6_SADDR_RULE_INIT
:
1147 /* Rule 0: remember if hiscore is not ready yet */
1150 case IPV6_SADDR_RULE_LOCAL
:
1151 /* Rule 1: Prefer same address */
1152 ret
= ipv6_addr_equal(&score
->ifa
->addr
, dst
->addr
);
1154 case IPV6_SADDR_RULE_SCOPE
:
1155 /* Rule 2: Prefer appropriate scope
1160 * ---+--+-+---> scope
1162 * | d is scope of the destination.
1164 * | \ <- smaller scope is better if
1165 * B-15 | \ if scope is enough for destinaion.
1166 * | ret = B - scope (-1 <= scope >= d <= 15).
1168 * |/ <- greater is better
1169 * -C / if scope is not enough for destination.
1170 * /| ret = scope - C (-1 <= d < scope <= 15).
1172 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1173 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1174 * Assume B = 0 and we get C > 29.
1176 ret
= __ipv6_addr_src_scope(score
->addr_type
);
1177 if (ret
>= dst
->scope
)
1180 ret
-= 128; /* 30 is enough */
1181 score
->scopedist
= ret
;
1183 case IPV6_SADDR_RULE_PREFERRED
:
1184 /* Rule 3: Avoid deprecated and optimistic addresses */
1185 ret
= ipv6_saddr_preferred(score
->addr_type
) ||
1186 !(score
->ifa
->flags
& (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
));
1188 #ifdef CONFIG_IPV6_MIP6
1189 case IPV6_SADDR_RULE_HOA
:
1191 /* Rule 4: Prefer home address */
1192 int prefhome
= !(dst
->prefs
& IPV6_PREFER_SRC_COA
);
1193 ret
= !(score
->ifa
->flags
& IFA_F_HOMEADDRESS
) ^ prefhome
;
1197 case IPV6_SADDR_RULE_OIF
:
1198 /* Rule 5: Prefer outgoing interface */
1199 ret
= (!dst
->ifindex
||
1200 dst
->ifindex
== score
->ifa
->idev
->dev
->ifindex
);
1202 case IPV6_SADDR_RULE_LABEL
:
1203 /* Rule 6: Prefer matching label */
1204 ret
= ipv6_addr_label(net
,
1205 &score
->ifa
->addr
, score
->addr_type
,
1206 score
->ifa
->idev
->dev
->ifindex
) == dst
->label
;
1208 #ifdef CONFIG_IPV6_PRIVACY
1209 case IPV6_SADDR_RULE_PRIVACY
:
1211 /* Rule 7: Prefer public address
1212 * Note: prefer temporary address if use_tempaddr >= 2
1214 int preftmp
= dst
->prefs
& (IPV6_PREFER_SRC_PUBLIC
|IPV6_PREFER_SRC_TMP
) ?
1215 !!(dst
->prefs
& IPV6_PREFER_SRC_TMP
) :
1216 score
->ifa
->idev
->cnf
.use_tempaddr
>= 2;
1217 ret
= (!(score
->ifa
->flags
& IFA_F_TEMPORARY
)) ^ preftmp
;
1221 case IPV6_SADDR_RULE_ORCHID
:
1222 /* Rule 8-: Prefer ORCHID vs ORCHID or
1223 * non-ORCHID vs non-ORCHID
1225 ret
= !(ipv6_addr_orchid(&score
->ifa
->addr
) ^
1226 ipv6_addr_orchid(dst
->addr
));
1228 case IPV6_SADDR_RULE_PREFIX
:
1229 /* Rule 8: Use longest matching prefix */
1230 ret
= ipv6_addr_diff(&score
->ifa
->addr
, dst
->addr
);
1231 if (ret
> score
->ifa
->prefix_len
)
1232 ret
= score
->ifa
->prefix_len
;
1233 score
->matchlen
= ret
;
1240 __set_bit(i
, score
->scorebits
);
1246 int ipv6_dev_get_saddr(struct net
*net
, const struct net_device
*dst_dev
,
1247 const struct in6_addr
*daddr
, unsigned int prefs
,
1248 struct in6_addr
*saddr
)
1250 struct ipv6_saddr_score scores
[2],
1251 *score
= &scores
[0], *hiscore
= &scores
[1];
1252 struct ipv6_saddr_dst dst
;
1253 struct net_device
*dev
;
1256 dst_type
= __ipv6_addr_type(daddr
);
1258 dst
.ifindex
= dst_dev
? dst_dev
->ifindex
: 0;
1259 dst
.scope
= __ipv6_addr_src_scope(dst_type
);
1260 dst
.label
= ipv6_addr_label(net
, daddr
, dst_type
, dst
.ifindex
);
1264 hiscore
->ifa
= NULL
;
1268 for_each_netdev_rcu(net
, dev
) {
1269 struct inet6_dev
*idev
;
1271 /* Candidate Source Address (section 4)
1272 * - multicast and link-local destination address,
1273 * the set of candidate source address MUST only
1274 * include addresses assigned to interfaces
1275 * belonging to the same link as the outgoing
1277 * (- For site-local destination addresses, the
1278 * set of candidate source addresses MUST only
1279 * include addresses assigned to interfaces
1280 * belonging to the same site as the outgoing
1283 if (((dst_type
& IPV6_ADDR_MULTICAST
) ||
1284 dst
.scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
) &&
1285 dst
.ifindex
&& dev
->ifindex
!= dst
.ifindex
)
1288 idev
= __in6_dev_get(dev
);
1292 read_lock_bh(&idev
->lock
);
1293 list_for_each_entry(score
->ifa
, &idev
->addr_list
, if_list
) {
1297 * - Tentative Address (RFC2462 section 5.4)
1298 * - A tentative address is not considered
1299 * "assigned to an interface" in the traditional
1300 * sense, unless it is also flagged as optimistic.
1301 * - Candidate Source Address (section 4)
1302 * - In any case, anycast addresses, multicast
1303 * addresses, and the unspecified address MUST
1304 * NOT be included in a candidate set.
1306 if ((score
->ifa
->flags
& IFA_F_TENTATIVE
) &&
1307 (!(score
->ifa
->flags
& IFA_F_OPTIMISTIC
)))
1310 score
->addr_type
= __ipv6_addr_type(&score
->ifa
->addr
);
1312 if (unlikely(score
->addr_type
== IPV6_ADDR_ANY
||
1313 score
->addr_type
& IPV6_ADDR_MULTICAST
)) {
1314 LIMIT_NETDEBUG(KERN_DEBUG
1315 "ADDRCONF: unspecified / multicast address "
1316 "assigned as unicast address on %s",
1322 bitmap_zero(score
->scorebits
, IPV6_SADDR_RULE_MAX
);
1324 for (i
= 0; i
< IPV6_SADDR_RULE_MAX
; i
++) {
1325 int minihiscore
, miniscore
;
1327 minihiscore
= ipv6_get_saddr_eval(net
, hiscore
, &dst
, i
);
1328 miniscore
= ipv6_get_saddr_eval(net
, score
, &dst
, i
);
1330 if (minihiscore
> miniscore
) {
1331 if (i
== IPV6_SADDR_RULE_SCOPE
&&
1332 score
->scopedist
> 0) {
1335 * each remaining entry
1336 * has too small (not enough)
1337 * scope, because ifa entries
1338 * are sorted by their scope
1344 } else if (minihiscore
< miniscore
) {
1346 in6_ifa_put(hiscore
->ifa
);
1348 in6_ifa_hold(score
->ifa
);
1350 swap(hiscore
, score
);
1352 /* restore our iterator */
1353 score
->ifa
= hiscore
->ifa
;
1360 read_unlock_bh(&idev
->lock
);
1365 return -EADDRNOTAVAIL
;
1367 *saddr
= hiscore
->ifa
->addr
;
1368 in6_ifa_put(hiscore
->ifa
);
1371 EXPORT_SYMBOL(ipv6_dev_get_saddr
);
1373 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1374 unsigned char banned_flags
)
1376 struct inet6_dev
*idev
;
1377 int err
= -EADDRNOTAVAIL
;
1380 idev
= __in6_dev_get(dev
);
1382 struct inet6_ifaddr
*ifp
;
1384 read_lock_bh(&idev
->lock
);
1385 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
1386 if (ifp
->scope
== IFA_LINK
&&
1387 !(ifp
->flags
& banned_flags
)) {
1393 read_unlock_bh(&idev
->lock
);
1399 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1402 struct inet6_ifaddr
*ifp
;
1404 read_lock_bh(&idev
->lock
);
1405 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
)
1407 read_unlock_bh(&idev
->lock
);
1411 int ipv6_chk_addr(struct net
*net
, const struct in6_addr
*addr
,
1412 struct net_device
*dev
, int strict
)
1414 struct inet6_ifaddr
*ifp
;
1415 struct hlist_node
*node
;
1416 unsigned int hash
= inet6_addr_hash(addr
);
1419 hlist_for_each_entry_rcu(ifp
, node
, &inet6_addr_lst
[hash
], addr_lst
) {
1420 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1422 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1423 !(ifp
->flags
&IFA_F_TENTATIVE
) &&
1424 (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1425 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))) {
1426 rcu_read_unlock_bh();
1431 rcu_read_unlock_bh();
1434 EXPORT_SYMBOL(ipv6_chk_addr
);
1436 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
1437 struct net_device
*dev
)
1439 unsigned int hash
= inet6_addr_hash(addr
);
1440 struct inet6_ifaddr
*ifp
;
1441 struct hlist_node
*node
;
1443 hlist_for_each_entry(ifp
, node
, &inet6_addr_lst
[hash
], addr_lst
) {
1444 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1446 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1447 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1454 int ipv6_chk_prefix(const struct in6_addr
*addr
, struct net_device
*dev
)
1456 struct inet6_dev
*idev
;
1457 struct inet6_ifaddr
*ifa
;
1462 idev
= __in6_dev_get(dev
);
1464 read_lock_bh(&idev
->lock
);
1465 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
1466 onlink
= ipv6_prefix_equal(addr
, &ifa
->addr
,
1471 read_unlock_bh(&idev
->lock
);
1476 EXPORT_SYMBOL(ipv6_chk_prefix
);
1478 struct inet6_ifaddr
*ipv6_get_ifaddr(struct net
*net
, const struct in6_addr
*addr
,
1479 struct net_device
*dev
, int strict
)
1481 struct inet6_ifaddr
*ifp
, *result
= NULL
;
1482 unsigned int hash
= inet6_addr_hash(addr
);
1483 struct hlist_node
*node
;
1486 hlist_for_each_entry_rcu_bh(ifp
, node
, &inet6_addr_lst
[hash
], addr_lst
) {
1487 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1489 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1490 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1491 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1498 rcu_read_unlock_bh();
1503 /* Gets referenced address, destroys ifaddr */
1505 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
, int dad_failed
)
1507 if (ifp
->flags
&IFA_F_PERMANENT
) {
1508 spin_lock_bh(&ifp
->lock
);
1509 addrconf_del_timer(ifp
);
1510 ifp
->flags
|= IFA_F_TENTATIVE
;
1512 ifp
->flags
|= IFA_F_DADFAILED
;
1513 spin_unlock_bh(&ifp
->lock
);
1515 ipv6_ifa_notify(0, ifp
);
1517 #ifdef CONFIG_IPV6_PRIVACY
1518 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1519 struct inet6_ifaddr
*ifpub
;
1520 spin_lock_bh(&ifp
->lock
);
1523 in6_ifa_hold(ifpub
);
1524 spin_unlock_bh(&ifp
->lock
);
1525 ipv6_create_tempaddr(ifpub
, ifp
);
1528 spin_unlock_bh(&ifp
->lock
);
1536 static int addrconf_dad_end(struct inet6_ifaddr
*ifp
)
1540 spin_lock(&ifp
->state_lock
);
1541 if (ifp
->state
== INET6_IFADDR_STATE_DAD
) {
1542 ifp
->state
= INET6_IFADDR_STATE_POSTDAD
;
1545 spin_unlock(&ifp
->state_lock
);
1550 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1552 struct inet6_dev
*idev
= ifp
->idev
;
1554 if (addrconf_dad_end(ifp
)) {
1559 net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n",
1560 ifp
->idev
->dev
->name
, &ifp
->addr
);
1562 if (idev
->cnf
.accept_dad
> 1 && !idev
->cnf
.disable_ipv6
) {
1563 struct in6_addr addr
;
1565 addr
.s6_addr32
[0] = htonl(0xfe800000);
1566 addr
.s6_addr32
[1] = 0;
1568 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) &&
1569 ipv6_addr_equal(&ifp
->addr
, &addr
)) {
1570 /* DAD failed for link-local based on MAC address */
1571 idev
->cnf
.disable_ipv6
= 1;
1573 pr_info("%s: IPv6 being disabled!\n",
1574 ifp
->idev
->dev
->name
);
1578 addrconf_dad_stop(ifp
, 1);
1581 /* Join to solicited addr multicast group. */
1583 void addrconf_join_solict(struct net_device
*dev
, const struct in6_addr
*addr
)
1585 struct in6_addr maddr
;
1587 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1590 addrconf_addr_solict_mult(addr
, &maddr
);
1591 ipv6_dev_mc_inc(dev
, &maddr
);
1594 void addrconf_leave_solict(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
1596 struct in6_addr maddr
;
1598 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1601 addrconf_addr_solict_mult(addr
, &maddr
);
1602 __ipv6_dev_mc_dec(idev
, &maddr
);
1605 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1607 struct in6_addr addr
;
1608 if (ifp
->prefix_len
== 127) /* RFC 6164 */
1610 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1611 if (ipv6_addr_any(&addr
))
1613 ipv6_dev_ac_inc(ifp
->idev
->dev
, &addr
);
1616 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1618 struct in6_addr addr
;
1619 if (ifp
->prefix_len
== 127) /* RFC 6164 */
1621 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1622 if (ipv6_addr_any(&addr
))
1624 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1627 static int addrconf_ifid_eui48(u8
*eui
, struct net_device
*dev
)
1629 if (dev
->addr_len
!= ETH_ALEN
)
1631 memcpy(eui
, dev
->dev_addr
, 3);
1632 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1635 * The zSeries OSA network cards can be shared among various
1636 * OS instances, but the OSA cards have only one MAC address.
1637 * This leads to duplicate address conflicts in conjunction
1638 * with IPv6 if more than one instance uses the same card.
1640 * The driver for these cards can deliver a unique 16-bit
1641 * identifier for each instance sharing the same card. It is
1642 * placed instead of 0xFFFE in the interface identifier. The
1643 * "u" bit of the interface identifier is not inverted in this
1644 * case. Hence the resulting interface identifier has local
1645 * scope according to RFC2373.
1648 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1649 eui
[4] = dev
->dev_id
& 0xFF;
1658 static int addrconf_ifid_eui64(u8
*eui
, struct net_device
*dev
)
1660 if (dev
->addr_len
!= IEEE802154_ADDR_LEN
)
1662 memcpy(eui
, dev
->dev_addr
, 8);
1667 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
1669 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1670 if (dev
->addr_len
!= ARCNET_ALEN
)
1673 eui
[7] = *(u8
*)dev
->dev_addr
;
1677 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
1679 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1681 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1686 static int __ipv6_isatap_ifid(u8
*eui
, __be32 addr
)
1690 eui
[0] = (ipv4_is_zeronet(addr
) || ipv4_is_private_10(addr
) ||
1691 ipv4_is_loopback(addr
) || ipv4_is_linklocal_169(addr
) ||
1692 ipv4_is_private_172(addr
) || ipv4_is_test_192(addr
) ||
1693 ipv4_is_anycast_6to4(addr
) || ipv4_is_private_192(addr
) ||
1694 ipv4_is_test_198(addr
) || ipv4_is_multicast(addr
) ||
1695 ipv4_is_lbcast(addr
)) ? 0x00 : 0x02;
1699 memcpy(eui
+ 4, &addr
, 4);
1703 static int addrconf_ifid_sit(u8
*eui
, struct net_device
*dev
)
1705 if (dev
->priv_flags
& IFF_ISATAP
)
1706 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
1710 static int addrconf_ifid_gre(u8
*eui
, struct net_device
*dev
)
1712 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
1715 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1717 switch (dev
->type
) {
1720 return addrconf_ifid_eui48(eui
, dev
);
1722 return addrconf_ifid_arcnet(eui
, dev
);
1723 case ARPHRD_INFINIBAND
:
1724 return addrconf_ifid_infiniband(eui
, dev
);
1726 return addrconf_ifid_sit(eui
, dev
);
1728 return addrconf_ifid_gre(eui
, dev
);
1729 case ARPHRD_IEEE802154
:
1730 return addrconf_ifid_eui64(eui
, dev
);
1735 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1738 struct inet6_ifaddr
*ifp
;
1740 read_lock_bh(&idev
->lock
);
1741 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
1742 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1743 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1748 read_unlock_bh(&idev
->lock
);
1752 #ifdef CONFIG_IPV6_PRIVACY
1753 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1754 static void __ipv6_regen_rndid(struct inet6_dev
*idev
)
1757 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
1758 idev
->rndid
[0] &= ~0x02;
1761 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1762 * check if generated address is not inappropriate
1764 * - Reserved subnet anycast (RFC 2526)
1765 * 11111101 11....11 1xxxxxxx
1766 * - ISATAP (RFC4214) 6.1
1767 * 00-00-5E-FE-xx-xx-xx-xx
1769 * - XXX: already assigned to an address on the device
1771 if (idev
->rndid
[0] == 0xfd &&
1772 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1773 (idev
->rndid
[7]&0x80))
1775 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1776 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1778 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1783 static void ipv6_regen_rndid(unsigned long data
)
1785 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1786 unsigned long expires
;
1789 write_lock_bh(&idev
->lock
);
1794 __ipv6_regen_rndid(idev
);
1797 idev
->cnf
.temp_prefered_lft
* HZ
-
1798 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
-
1799 idev
->cnf
.max_desync_factor
* HZ
;
1800 if (time_before(expires
, jiffies
)) {
1801 pr_warn("%s: too short regeneration interval; timer disabled for %s\n",
1802 __func__
, idev
->dev
->name
);
1806 if (!mod_timer(&idev
->regen_timer
, expires
))
1810 write_unlock_bh(&idev
->lock
);
1811 rcu_read_unlock_bh();
1815 static void __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
)
1817 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1818 __ipv6_regen_rndid(idev
);
1827 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1828 unsigned long expires
, u32 flags
)
1830 struct fib6_config cfg
= {
1831 .fc_table
= RT6_TABLE_PREFIX
,
1832 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1833 .fc_ifindex
= dev
->ifindex
,
1834 .fc_expires
= expires
,
1836 .fc_flags
= RTF_UP
| flags
,
1837 .fc_nlinfo
.nl_net
= dev_net(dev
),
1838 .fc_protocol
= RTPROT_KERNEL
,
1843 /* Prevent useless cloning on PtP SIT.
1844 This thing is done here expecting that the whole
1845 class of non-broadcast devices need not cloning.
1847 #if IS_ENABLED(CONFIG_IPV6_SIT)
1848 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
1849 cfg
.fc_flags
|= RTF_NONEXTHOP
;
1852 ip6_route_add(&cfg
);
1856 static struct rt6_info
*addrconf_get_prefix_route(const struct in6_addr
*pfx
,
1858 const struct net_device
*dev
,
1859 u32 flags
, u32 noflags
)
1861 struct fib6_node
*fn
;
1862 struct rt6_info
*rt
= NULL
;
1863 struct fib6_table
*table
;
1865 table
= fib6_get_table(dev_net(dev
), RT6_TABLE_PREFIX
);
1869 read_lock_bh(&table
->tb6_lock
);
1870 fn
= fib6_locate(&table
->tb6_root
, pfx
, plen
, NULL
, 0);
1873 for (rt
= fn
->leaf
; rt
; rt
= rt
->dst
.rt6_next
) {
1874 if (rt
->dst
.dev
->ifindex
!= dev
->ifindex
)
1876 if ((rt
->rt6i_flags
& flags
) != flags
)
1878 if ((rt
->rt6i_flags
& noflags
) != 0)
1884 read_unlock_bh(&table
->tb6_lock
);
1889 /* Create "default" multicast route to the interface */
1891 static void addrconf_add_mroute(struct net_device
*dev
)
1893 struct fib6_config cfg
= {
1894 .fc_table
= RT6_TABLE_LOCAL
,
1895 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1896 .fc_ifindex
= dev
->ifindex
,
1899 .fc_nlinfo
.nl_net
= dev_net(dev
),
1902 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
1904 ip6_route_add(&cfg
);
1907 #if IS_ENABLED(CONFIG_IPV6_SIT)
1908 static void sit_route_add(struct net_device
*dev
)
1910 struct fib6_config cfg
= {
1911 .fc_table
= RT6_TABLE_MAIN
,
1912 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1913 .fc_ifindex
= dev
->ifindex
,
1915 .fc_flags
= RTF_UP
| RTF_NONEXTHOP
,
1916 .fc_nlinfo
.nl_net
= dev_net(dev
),
1919 /* prefix length - 96 bits "::d.d.d.d" */
1920 ip6_route_add(&cfg
);
1924 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
1926 struct inet6_dev
*idev
;
1930 idev
= ipv6_find_idev(dev
);
1932 return ERR_PTR(-ENOBUFS
);
1934 if (idev
->cnf
.disable_ipv6
)
1935 return ERR_PTR(-EACCES
);
1937 /* Add default multicast route */
1938 if (!(dev
->flags
& IFF_LOOPBACK
))
1939 addrconf_add_mroute(dev
);
1944 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
, bool sllao
)
1946 struct prefix_info
*pinfo
;
1950 struct inet6_dev
*in6_dev
;
1951 struct net
*net
= dev_net(dev
);
1953 pinfo
= (struct prefix_info
*) opt
;
1955 if (len
< sizeof(struct prefix_info
)) {
1956 ADBG(("addrconf: prefix option too short\n"));
1961 * Validation checks ([ADDRCONF], page 19)
1964 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
1966 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
1969 valid_lft
= ntohl(pinfo
->valid
);
1970 prefered_lft
= ntohl(pinfo
->prefered
);
1972 if (prefered_lft
> valid_lft
) {
1973 net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n");
1977 in6_dev
= in6_dev_get(dev
);
1979 if (in6_dev
== NULL
) {
1980 net_dbg_ratelimited("addrconf: device %s not configured\n",
1986 * Two things going on here:
1987 * 1) Add routes for on-link prefixes
1988 * 2) Configure prefixes with the auto flag set
1991 if (pinfo
->onlink
) {
1992 struct rt6_info
*rt
;
1993 unsigned long rt_expires
;
1995 /* Avoid arithmetic overflow. Really, we could
1996 * save rt_expires in seconds, likely valid_lft,
1997 * but it would require division in fib gc, that it
2001 rt_expires
= addrconf_timeout_fixup(valid_lft
, HZ
);
2003 rt_expires
= addrconf_timeout_fixup(valid_lft
, USER_HZ
);
2005 if (addrconf_finite_timeout(rt_expires
))
2008 rt
= addrconf_get_prefix_route(&pinfo
->prefix
,
2011 RTF_ADDRCONF
| RTF_PREFIX_RT
,
2012 RTF_GATEWAY
| RTF_DEFAULT
);
2015 /* Autoconf prefix route */
2016 if (valid_lft
== 0) {
2019 } else if (addrconf_finite_timeout(rt_expires
)) {
2021 rt6_set_expires(rt
, jiffies
+ rt_expires
);
2023 rt6_clean_expires(rt
);
2025 } else if (valid_lft
) {
2026 clock_t expires
= 0;
2027 int flags
= RTF_ADDRCONF
| RTF_PREFIX_RT
;
2028 if (addrconf_finite_timeout(rt_expires
)) {
2030 flags
|= RTF_EXPIRES
;
2031 expires
= jiffies_to_clock_t(rt_expires
);
2033 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
2034 dev
, expires
, flags
);
2039 /* Try to figure out our local address for this prefix */
2041 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
2042 struct inet6_ifaddr
*ifp
;
2043 struct in6_addr addr
;
2044 int create
= 0, update_lft
= 0;
2046 if (pinfo
->prefix_len
== 64) {
2047 memcpy(&addr
, &pinfo
->prefix
, 8);
2048 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
2049 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
2050 in6_dev_put(in6_dev
);
2055 net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n",
2057 in6_dev_put(in6_dev
);
2062 ifp
= ipv6_get_ifaddr(net
, &addr
, dev
, 1);
2064 if (ifp
== NULL
&& valid_lft
) {
2065 int max_addresses
= in6_dev
->cnf
.max_addresses
;
2068 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2069 if (in6_dev
->cnf
.optimistic_dad
&&
2070 !net
->ipv6
.devconf_all
->forwarding
&& sllao
)
2071 addr_flags
= IFA_F_OPTIMISTIC
;
2074 /* Do not allow to create too much of autoconfigured
2075 * addresses; this would be too easy way to crash kernel.
2077 if (!max_addresses
||
2078 ipv6_count_addresses(in6_dev
) < max_addresses
)
2079 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
2080 addr_type
&IPV6_ADDR_SCOPE_MASK
,
2083 if (!ifp
|| IS_ERR(ifp
)) {
2084 in6_dev_put(in6_dev
);
2088 update_lft
= create
= 1;
2089 ifp
->cstamp
= jiffies
;
2090 addrconf_dad_start(ifp
);
2096 #ifdef CONFIG_IPV6_PRIVACY
2097 struct inet6_ifaddr
*ift
;
2101 /* update lifetime (RFC2462 5.5.3 e) */
2102 spin_lock(&ifp
->lock
);
2104 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
2105 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
2108 if (!update_lft
&& stored_lft
) {
2109 if (valid_lft
> MIN_VALID_LIFETIME
||
2110 valid_lft
> stored_lft
)
2112 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
2113 /* valid_lft <= stored_lft is always true */
2115 * RFC 4862 Section 5.5.3e:
2116 * "Note that the preferred lifetime of
2117 * the corresponding address is always
2118 * reset to the Preferred Lifetime in
2119 * the received Prefix Information
2120 * option, regardless of whether the
2121 * valid lifetime is also reset or
2124 * So if the preferred lifetime in
2125 * this advertisement is different
2126 * than what we have stored, but the
2127 * valid lifetime is invalid, just
2128 * reset prefered_lft.
2130 * We must set the valid lifetime
2131 * to the stored lifetime since we'll
2132 * be updating the timestamp below,
2133 * else we'll set it back to the
2136 if (prefered_lft
!= ifp
->prefered_lft
) {
2137 valid_lft
= stored_lft
;
2141 valid_lft
= MIN_VALID_LIFETIME
;
2142 if (valid_lft
< prefered_lft
)
2143 prefered_lft
= valid_lft
;
2149 ifp
->valid_lft
= valid_lft
;
2150 ifp
->prefered_lft
= prefered_lft
;
2153 ifp
->flags
&= ~IFA_F_DEPRECATED
;
2154 spin_unlock(&ifp
->lock
);
2156 if (!(flags
&IFA_F_TENTATIVE
))
2157 ipv6_ifa_notify(0, ifp
);
2159 spin_unlock(&ifp
->lock
);
2161 #ifdef CONFIG_IPV6_PRIVACY
2162 read_lock_bh(&in6_dev
->lock
);
2163 /* update all temporary addresses in the list */
2164 list_for_each_entry(ift
, &in6_dev
->tempaddr_list
,
2166 int age
, max_valid
, max_prefered
;
2168 if (ifp
!= ift
->ifpub
)
2172 * RFC 4941 section 3.3:
2173 * If a received option will extend the lifetime
2174 * of a public address, the lifetimes of
2175 * temporary addresses should be extended,
2176 * subject to the overall constraint that no
2177 * temporary addresses should ever remain
2178 * "valid" or "preferred" for a time longer than
2179 * (TEMP_VALID_LIFETIME) or
2180 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR),
2183 age
= (now
- ift
->cstamp
) / HZ
;
2184 max_valid
= in6_dev
->cnf
.temp_valid_lft
- age
;
2188 max_prefered
= in6_dev
->cnf
.temp_prefered_lft
-
2189 in6_dev
->cnf
.max_desync_factor
-
2191 if (max_prefered
< 0)
2194 if (valid_lft
> max_valid
)
2195 valid_lft
= max_valid
;
2197 if (prefered_lft
> max_prefered
)
2198 prefered_lft
= max_prefered
;
2200 spin_lock(&ift
->lock
);
2202 ift
->valid_lft
= valid_lft
;
2203 ift
->prefered_lft
= prefered_lft
;
2205 if (prefered_lft
> 0)
2206 ift
->flags
&= ~IFA_F_DEPRECATED
;
2208 spin_unlock(&ift
->lock
);
2209 if (!(flags
&IFA_F_TENTATIVE
))
2210 ipv6_ifa_notify(0, ift
);
2213 if ((create
|| list_empty(&in6_dev
->tempaddr_list
)) && in6_dev
->cnf
.use_tempaddr
> 0) {
2215 * When a new public address is created as
2216 * described in [ADDRCONF], also create a new
2217 * temporary address. Also create a temporary
2218 * address if it's enabled but no temporary
2219 * address currently exists.
2221 read_unlock_bh(&in6_dev
->lock
);
2222 ipv6_create_tempaddr(ifp
, NULL
);
2224 read_unlock_bh(&in6_dev
->lock
);
2231 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
2232 in6_dev_put(in6_dev
);
2236 * Set destination address.
2237 * Special case for SIT interfaces where we create a new "virtual"
2240 int addrconf_set_dstaddr(struct net
*net
, void __user
*arg
)
2242 struct in6_ifreq ireq
;
2243 struct net_device
*dev
;
2249 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2252 dev
= __dev_get_by_index(net
, ireq
.ifr6_ifindex
);
2258 #if IS_ENABLED(CONFIG_IPV6_SIT)
2259 if (dev
->type
== ARPHRD_SIT
) {
2260 const struct net_device_ops
*ops
= dev
->netdev_ops
;
2262 struct ip_tunnel_parm p
;
2264 err
= -EADDRNOTAVAIL
;
2265 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
2268 memset(&p
, 0, sizeof(p
));
2269 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
2273 p
.iph
.protocol
= IPPROTO_IPV6
;
2275 ifr
.ifr_ifru
.ifru_data
= (__force
void __user
*)&p
;
2277 if (ops
->ndo_do_ioctl
) {
2278 mm_segment_t oldfs
= get_fs();
2281 err
= ops
->ndo_do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
2288 dev
= __dev_get_by_name(net
, p
.name
);
2291 err
= dev_open(dev
);
2302 * Manual configuration of address on an interface
2304 static int inet6_addr_add(struct net
*net
, int ifindex
, const struct in6_addr
*pfx
,
2305 unsigned int plen
, __u8 ifa_flags
, __u32 prefered_lft
,
2308 struct inet6_ifaddr
*ifp
;
2309 struct inet6_dev
*idev
;
2310 struct net_device
*dev
;
2314 unsigned long timeout
;
2321 /* check the lifetime */
2322 if (!valid_lft
|| prefered_lft
> valid_lft
)
2325 dev
= __dev_get_by_index(net
, ifindex
);
2329 idev
= addrconf_add_dev(dev
);
2331 return PTR_ERR(idev
);
2333 scope
= ipv6_addr_scope(pfx
);
2335 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
2336 if (addrconf_finite_timeout(timeout
)) {
2337 expires
= jiffies_to_clock_t(timeout
* HZ
);
2338 valid_lft
= timeout
;
2339 flags
= RTF_EXPIRES
;
2343 ifa_flags
|= IFA_F_PERMANENT
;
2346 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
2347 if (addrconf_finite_timeout(timeout
)) {
2349 ifa_flags
|= IFA_F_DEPRECATED
;
2350 prefered_lft
= timeout
;
2353 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, ifa_flags
);
2356 spin_lock_bh(&ifp
->lock
);
2357 ifp
->valid_lft
= valid_lft
;
2358 ifp
->prefered_lft
= prefered_lft
;
2359 ifp
->tstamp
= jiffies
;
2360 spin_unlock_bh(&ifp
->lock
);
2362 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
2365 * Note that section 3.1 of RFC 4429 indicates
2366 * that the Optimistic flag should not be set for
2367 * manually configured addresses
2369 addrconf_dad_start(ifp
);
2375 return PTR_ERR(ifp
);
2378 static int inet6_addr_del(struct net
*net
, int ifindex
, const struct in6_addr
*pfx
,
2381 struct inet6_ifaddr
*ifp
;
2382 struct inet6_dev
*idev
;
2383 struct net_device
*dev
;
2388 dev
= __dev_get_by_index(net
, ifindex
);
2392 if ((idev
= __in6_dev_get(dev
)) == NULL
)
2395 read_lock_bh(&idev
->lock
);
2396 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
2397 if (ifp
->prefix_len
== plen
&&
2398 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
2400 read_unlock_bh(&idev
->lock
);
2404 /* If the last address is deleted administratively,
2405 disable IPv6 on this interface.
2407 if (list_empty(&idev
->addr_list
))
2408 addrconf_ifdown(idev
->dev
, 1);
2412 read_unlock_bh(&idev
->lock
);
2413 return -EADDRNOTAVAIL
;
2417 int addrconf_add_ifaddr(struct net
*net
, void __user
*arg
)
2419 struct in6_ifreq ireq
;
2422 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
2425 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2429 err
= inet6_addr_add(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2430 ireq
.ifr6_prefixlen
, IFA_F_PERMANENT
,
2431 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2436 int addrconf_del_ifaddr(struct net
*net
, void __user
*arg
)
2438 struct in6_ifreq ireq
;
2441 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
2444 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2448 err
= inet6_addr_del(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2449 ireq
.ifr6_prefixlen
);
2454 static void add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
2455 int plen
, int scope
)
2457 struct inet6_ifaddr
*ifp
;
2459 ifp
= ipv6_add_addr(idev
, addr
, plen
, scope
, IFA_F_PERMANENT
);
2461 spin_lock_bh(&ifp
->lock
);
2462 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2463 spin_unlock_bh(&ifp
->lock
);
2464 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2469 #if IS_ENABLED(CONFIG_IPV6_SIT)
2470 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
2472 struct in6_addr addr
;
2473 struct net_device
*dev
;
2474 struct net
*net
= dev_net(idev
->dev
);
2479 memset(&addr
, 0, sizeof(struct in6_addr
));
2480 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
2482 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
2483 addr
.s6_addr32
[0] = htonl(0xfe800000);
2486 scope
= IPV6_ADDR_COMPATv4
;
2489 if (addr
.s6_addr32
[3]) {
2490 add_addr(idev
, &addr
, 128, scope
);
2494 for_each_netdev(net
, dev
) {
2495 struct in_device
*in_dev
= __in_dev_get_rtnl(dev
);
2496 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
2497 struct in_ifaddr
*ifa
;
2501 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
2504 addr
.s6_addr32
[3] = ifa
->ifa_local
;
2506 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
2508 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
2509 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2513 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2518 add_addr(idev
, &addr
, plen
, flag
);
2525 static void init_loopback(struct net_device
*dev
)
2527 struct inet6_dev
*idev
;
2533 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2534 pr_debug("%s: add_dev failed\n", __func__
);
2538 add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
);
2541 static void addrconf_add_linklocal(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
2543 struct inet6_ifaddr
*ifp
;
2544 u32 addr_flags
= IFA_F_PERMANENT
;
2546 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2547 if (idev
->cnf
.optimistic_dad
&&
2548 !dev_net(idev
->dev
)->ipv6
.devconf_all
->forwarding
)
2549 addr_flags
|= IFA_F_OPTIMISTIC
;
2553 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, addr_flags
);
2555 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
2556 addrconf_dad_start(ifp
);
2561 static void addrconf_dev_config(struct net_device
*dev
)
2563 struct in6_addr addr
;
2564 struct inet6_dev
*idev
;
2568 if ((dev
->type
!= ARPHRD_ETHER
) &&
2569 (dev
->type
!= ARPHRD_FDDI
) &&
2570 (dev
->type
!= ARPHRD_ARCNET
) &&
2571 (dev
->type
!= ARPHRD_INFINIBAND
) &&
2572 (dev
->type
!= ARPHRD_IEEE802154
)) {
2573 /* Alas, we support only Ethernet autoconfiguration. */
2577 idev
= addrconf_add_dev(dev
);
2581 memset(&addr
, 0, sizeof(struct in6_addr
));
2582 addr
.s6_addr32
[0] = htonl(0xFE800000);
2584 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
2585 addrconf_add_linklocal(idev
, &addr
);
2588 #if IS_ENABLED(CONFIG_IPV6_SIT)
2589 static void addrconf_sit_config(struct net_device
*dev
)
2591 struct inet6_dev
*idev
;
2596 * Configure the tunnel with one of our IPv4
2597 * addresses... we should configure all of
2598 * our v4 addrs in the tunnel
2601 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2602 pr_debug("%s: add_dev failed\n", __func__
);
2606 if (dev
->priv_flags
& IFF_ISATAP
) {
2607 struct in6_addr addr
;
2609 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2610 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
2611 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
))
2612 addrconf_add_linklocal(idev
, &addr
);
2616 sit_add_v4_addrs(idev
);
2618 if (dev
->flags
&IFF_POINTOPOINT
)
2619 addrconf_add_mroute(dev
);
2625 #if IS_ENABLED(CONFIG_NET_IPGRE)
2626 static void addrconf_gre_config(struct net_device
*dev
)
2628 struct inet6_dev
*idev
;
2629 struct in6_addr addr
;
2631 pr_info("%s(%s)\n", __func__
, dev
->name
);
2635 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2636 pr_debug("%s: add_dev failed\n", __func__
);
2640 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2641 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
2643 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
))
2644 addrconf_add_linklocal(idev
, &addr
);
2649 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
2651 struct in6_addr lladdr
;
2653 if (!ipv6_get_lladdr(link_dev
, &lladdr
, IFA_F_TENTATIVE
)) {
2654 addrconf_add_linklocal(idev
, &lladdr
);
2660 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
2662 struct net_device
*link_dev
;
2663 struct net
*net
= dev_net(idev
->dev
);
2665 /* first try to inherit the link-local address from the link device */
2666 if (idev
->dev
->iflink
&&
2667 (link_dev
= __dev_get_by_index(net
, idev
->dev
->iflink
))) {
2668 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2671 /* then try to inherit it from any device */
2672 for_each_netdev(net
, link_dev
) {
2673 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2676 pr_debug("init ip6-ip6: add_linklocal failed\n");
2680 * Autoconfigure tunnel with a link-local address so routing protocols,
2681 * DHCPv6, MLD etc. can be run over the virtual link
2684 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
2686 struct inet6_dev
*idev
;
2690 idev
= addrconf_add_dev(dev
);
2692 pr_debug("init ip6-ip6: add_dev failed\n");
2695 ip6_tnl_add_linklocal(idev
);
2698 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
2701 struct net_device
*dev
= (struct net_device
*) data
;
2702 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2703 int run_pending
= 0;
2707 case NETDEV_REGISTER
:
2708 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2709 idev
= ipv6_add_dev(dev
);
2711 return notifier_from_errno(-ENOMEM
);
2717 if (dev
->flags
& IFF_SLAVE
)
2720 if (event
== NETDEV_UP
) {
2721 if (!addrconf_qdisc_ok(dev
)) {
2722 /* device is not ready yet. */
2723 pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n",
2728 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
)
2729 idev
= ipv6_add_dev(dev
);
2732 idev
->if_flags
|= IF_READY
;
2736 if (!addrconf_qdisc_ok(dev
)) {
2737 /* device is still not ready. */
2742 if (idev
->if_flags
& IF_READY
)
2743 /* device is already configured. */
2745 idev
->if_flags
|= IF_READY
;
2748 pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n",
2754 switch (dev
->type
) {
2755 #if IS_ENABLED(CONFIG_IPV6_SIT)
2757 addrconf_sit_config(dev
);
2760 #if IS_ENABLED(CONFIG_NET_IPGRE)
2762 addrconf_gre_config(dev
);
2765 case ARPHRD_TUNNEL6
:
2766 addrconf_ip6_tnl_config(dev
);
2768 case ARPHRD_LOOPBACK
:
2773 addrconf_dev_config(dev
);
2779 addrconf_dad_run(idev
);
2782 * If the MTU changed during the interface down,
2783 * when the interface up, the changed MTU must be
2784 * reflected in the idev as well as routers.
2786 if (idev
->cnf
.mtu6
!= dev
->mtu
&&
2787 dev
->mtu
>= IPV6_MIN_MTU
) {
2788 rt6_mtu_change(dev
, dev
->mtu
);
2789 idev
->cnf
.mtu6
= dev
->mtu
;
2791 idev
->tstamp
= jiffies
;
2792 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2795 * If the changed mtu during down is lower than
2796 * IPV6_MIN_MTU stop IPv6 on this interface.
2798 if (dev
->mtu
< IPV6_MIN_MTU
)
2799 addrconf_ifdown(dev
, 1);
2803 case NETDEV_CHANGEMTU
:
2804 if (idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2805 rt6_mtu_change(dev
, dev
->mtu
);
2806 idev
->cnf
.mtu6
= dev
->mtu
;
2810 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2811 idev
= ipv6_add_dev(dev
);
2817 * MTU falled under IPV6_MIN_MTU.
2818 * Stop IPv6 on this interface.
2822 case NETDEV_UNREGISTER
:
2824 * Remove all addresses from this interface.
2826 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2829 case NETDEV_CHANGENAME
:
2831 snmp6_unregister_dev(idev
);
2832 addrconf_sysctl_unregister(idev
);
2833 addrconf_sysctl_register(idev
);
2834 err
= snmp6_register_dev(idev
);
2836 return notifier_from_errno(err
);
2840 case NETDEV_PRE_TYPE_CHANGE
:
2841 case NETDEV_POST_TYPE_CHANGE
:
2842 addrconf_type_change(dev
, event
);
2850 * addrconf module should be notified of a device going up
2852 static struct notifier_block ipv6_dev_notf
= {
2853 .notifier_call
= addrconf_notify
,
2856 static void addrconf_type_change(struct net_device
*dev
, unsigned long event
)
2858 struct inet6_dev
*idev
;
2861 idev
= __in6_dev_get(dev
);
2863 if (event
== NETDEV_POST_TYPE_CHANGE
)
2864 ipv6_mc_remap(idev
);
2865 else if (event
== NETDEV_PRE_TYPE_CHANGE
)
2866 ipv6_mc_unmap(idev
);
2869 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2871 struct net
*net
= dev_net(dev
);
2872 struct inet6_dev
*idev
;
2873 struct inet6_ifaddr
*ifa
;
2878 rt6_ifdown(net
, dev
);
2879 neigh_ifdown(&nd_tbl
, dev
);
2881 idev
= __in6_dev_get(dev
);
2886 * Step 1: remove reference to ipv6 device from parent device.
2892 /* protected by rtnl_lock */
2893 RCU_INIT_POINTER(dev
->ip6_ptr
, NULL
);
2895 /* Step 1.5: remove snmp6 entry */
2896 snmp6_unregister_dev(idev
);
2900 /* Step 2: clear hash table */
2901 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
2902 struct hlist_head
*h
= &inet6_addr_lst
[i
];
2903 struct hlist_node
*n
;
2905 spin_lock_bh(&addrconf_hash_lock
);
2907 hlist_for_each_entry_rcu(ifa
, n
, h
, addr_lst
) {
2908 if (ifa
->idev
== idev
) {
2909 hlist_del_init_rcu(&ifa
->addr_lst
);
2910 addrconf_del_timer(ifa
);
2914 spin_unlock_bh(&addrconf_hash_lock
);
2917 write_lock_bh(&idev
->lock
);
2919 /* Step 2: clear flags for stateless addrconf */
2921 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
2923 #ifdef CONFIG_IPV6_PRIVACY
2924 if (how
&& del_timer(&idev
->regen_timer
))
2927 /* Step 3: clear tempaddr list */
2928 while (!list_empty(&idev
->tempaddr_list
)) {
2929 ifa
= list_first_entry(&idev
->tempaddr_list
,
2930 struct inet6_ifaddr
, tmp_list
);
2931 list_del(&ifa
->tmp_list
);
2932 write_unlock_bh(&idev
->lock
);
2933 spin_lock_bh(&ifa
->lock
);
2936 in6_ifa_put(ifa
->ifpub
);
2939 spin_unlock_bh(&ifa
->lock
);
2941 write_lock_bh(&idev
->lock
);
2945 while (!list_empty(&idev
->addr_list
)) {
2946 ifa
= list_first_entry(&idev
->addr_list
,
2947 struct inet6_ifaddr
, if_list
);
2948 addrconf_del_timer(ifa
);
2950 list_del(&ifa
->if_list
);
2952 write_unlock_bh(&idev
->lock
);
2954 spin_lock_bh(&ifa
->state_lock
);
2956 ifa
->state
= INET6_IFADDR_STATE_DEAD
;
2957 spin_unlock_bh(&ifa
->state_lock
);
2959 if (state
!= INET6_IFADDR_STATE_DEAD
) {
2960 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
2961 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifa
);
2965 write_lock_bh(&idev
->lock
);
2968 write_unlock_bh(&idev
->lock
);
2970 /* Step 5: Discard multicast list */
2972 ipv6_mc_destroy_dev(idev
);
2976 idev
->tstamp
= jiffies
;
2978 /* Last: Shot the device (if unregistered) */
2980 addrconf_sysctl_unregister(idev
);
2981 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
2982 neigh_ifdown(&nd_tbl
, dev
);
2988 static void addrconf_rs_timer(unsigned long data
)
2990 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2991 struct inet6_dev
*idev
= ifp
->idev
;
2993 read_lock(&idev
->lock
);
2994 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
))
2997 if (!ipv6_accept_ra(idev
))
3000 /* Announcement received after solicitation was sent */
3001 if (idev
->if_flags
& IF_RA_RCVD
)
3004 spin_lock(&ifp
->lock
);
3005 if (ifp
->probes
++ < idev
->cnf
.rtr_solicits
) {
3006 /* The wait after the last probe can be shorter */
3007 addrconf_mod_timer(ifp
, AC_RS
,
3008 (ifp
->probes
== idev
->cnf
.rtr_solicits
) ?
3009 idev
->cnf
.rtr_solicit_delay
:
3010 idev
->cnf
.rtr_solicit_interval
);
3011 spin_unlock(&ifp
->lock
);
3013 ndisc_send_rs(idev
->dev
, &ifp
->addr
, &in6addr_linklocal_allrouters
);
3015 spin_unlock(&ifp
->lock
);
3017 * Note: we do not support deprecated "all on-link"
3018 * assumption any longer.
3020 pr_debug("%s: no IPv6 routers present\n", idev
->dev
->name
);
3024 read_unlock(&idev
->lock
);
3029 * Duplicate Address Detection
3031 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
3033 unsigned long rand_num
;
3034 struct inet6_dev
*idev
= ifp
->idev
;
3036 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
3039 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
3041 ifp
->probes
= idev
->cnf
.dad_transmits
;
3042 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
3045 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
)
3047 struct inet6_dev
*idev
= ifp
->idev
;
3048 struct net_device
*dev
= idev
->dev
;
3050 addrconf_join_solict(dev
, &ifp
->addr
);
3052 net_srandom(ifp
->addr
.s6_addr32
[3]);
3054 read_lock_bh(&idev
->lock
);
3055 spin_lock(&ifp
->lock
);
3056 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
)
3059 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
3060 idev
->cnf
.accept_dad
< 1 ||
3061 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
3062 ifp
->flags
& IFA_F_NODAD
) {
3063 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
3064 spin_unlock(&ifp
->lock
);
3065 read_unlock_bh(&idev
->lock
);
3067 addrconf_dad_completed(ifp
);
3071 if (!(idev
->if_flags
& IF_READY
)) {
3072 spin_unlock(&ifp
->lock
);
3073 read_unlock_bh(&idev
->lock
);
3075 * If the device is not ready:
3076 * - keep it tentative if it is a permanent address.
3077 * - otherwise, kill it.
3080 addrconf_dad_stop(ifp
, 0);
3085 * Optimistic nodes can start receiving
3088 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
3089 ip6_ins_rt(ifp
->rt
);
3091 addrconf_dad_kick(ifp
);
3093 spin_unlock(&ifp
->lock
);
3094 read_unlock_bh(&idev
->lock
);
3097 static void addrconf_dad_timer(unsigned long data
)
3099 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
3100 struct inet6_dev
*idev
= ifp
->idev
;
3101 struct in6_addr mcaddr
;
3103 if (!ifp
->probes
&& addrconf_dad_end(ifp
))
3106 read_lock(&idev
->lock
);
3107 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
)) {
3108 read_unlock(&idev
->lock
);
3112 spin_lock(&ifp
->lock
);
3113 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
) {
3114 spin_unlock(&ifp
->lock
);
3115 read_unlock(&idev
->lock
);
3119 if (ifp
->probes
== 0) {
3121 * DAD was successful
3124 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
3125 spin_unlock(&ifp
->lock
);
3126 read_unlock(&idev
->lock
);
3128 addrconf_dad_completed(ifp
);
3134 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
3135 spin_unlock(&ifp
->lock
);
3136 read_unlock(&idev
->lock
);
3138 /* send a neighbour solicitation for our addr */
3139 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
3140 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &in6addr_any
);
3145 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
3147 struct net_device
*dev
= ifp
->idev
->dev
;
3150 * Configure the address for reception. Now it is valid.
3153 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
3155 /* If added prefix is link local and we are prepared to process
3156 router advertisements, start sending router solicitations.
3159 if (ipv6_accept_ra(ifp
->idev
) &&
3160 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
3161 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
3162 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
3164 * If a host as already performed a random delay
3165 * [...] as part of DAD [...] there is no need
3166 * to delay again before sending the first RS
3168 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &in6addr_linklocal_allrouters
);
3170 spin_lock_bh(&ifp
->lock
);
3172 ifp
->idev
->if_flags
|= IF_RS_SENT
;
3173 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
3174 spin_unlock_bh(&ifp
->lock
);
3178 static void addrconf_dad_run(struct inet6_dev
*idev
)
3180 struct inet6_ifaddr
*ifp
;
3182 read_lock_bh(&idev
->lock
);
3183 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
3184 spin_lock(&ifp
->lock
);
3185 if (ifp
->flags
& IFA_F_TENTATIVE
&&
3186 ifp
->state
== INET6_IFADDR_STATE_DAD
)
3187 addrconf_dad_kick(ifp
);
3188 spin_unlock(&ifp
->lock
);
3190 read_unlock_bh(&idev
->lock
);
3193 #ifdef CONFIG_PROC_FS
3194 struct if6_iter_state
{
3195 struct seq_net_private p
;
3200 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
, loff_t pos
)
3202 struct inet6_ifaddr
*ifa
= NULL
;
3203 struct if6_iter_state
*state
= seq
->private;
3204 struct net
*net
= seq_file_net(seq
);
3207 /* initial bucket if pos is 0 */
3213 for (; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
3214 struct hlist_node
*n
;
3215 hlist_for_each_entry_rcu_bh(ifa
, n
, &inet6_addr_lst
[state
->bucket
],
3217 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
3219 /* sync with offset */
3220 if (p
< state
->offset
) {
3228 /* prepare for next bucket */
3235 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
,
3236 struct inet6_ifaddr
*ifa
)
3238 struct if6_iter_state
*state
= seq
->private;
3239 struct net
*net
= seq_file_net(seq
);
3240 struct hlist_node
*n
= &ifa
->addr_lst
;
3242 hlist_for_each_entry_continue_rcu_bh(ifa
, n
, addr_lst
) {
3243 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
3249 while (++state
->bucket
< IN6_ADDR_HSIZE
) {
3251 hlist_for_each_entry_rcu_bh(ifa
, n
,
3252 &inet6_addr_lst
[state
->bucket
], addr_lst
) {
3253 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
3263 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
3267 return if6_get_first(seq
, *pos
);
3270 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
3272 struct inet6_ifaddr
*ifa
;
3274 ifa
= if6_get_next(seq
, v
);
3279 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
3282 rcu_read_unlock_bh();
3285 static int if6_seq_show(struct seq_file
*seq
, void *v
)
3287 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
3288 seq_printf(seq
, "%pi6 %02x %02x %02x %02x %8s\n",
3290 ifp
->idev
->dev
->ifindex
,
3294 ifp
->idev
->dev
->name
);
3298 static const struct seq_operations if6_seq_ops
= {
3299 .start
= if6_seq_start
,
3300 .next
= if6_seq_next
,
3301 .show
= if6_seq_show
,
3302 .stop
= if6_seq_stop
,
3305 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
3307 return seq_open_net(inode
, file
, &if6_seq_ops
,
3308 sizeof(struct if6_iter_state
));
3311 static const struct file_operations if6_fops
= {
3312 .owner
= THIS_MODULE
,
3313 .open
= if6_seq_open
,
3315 .llseek
= seq_lseek
,
3316 .release
= seq_release_net
,
3319 static int __net_init
if6_proc_net_init(struct net
*net
)
3321 if (!proc_net_fops_create(net
, "if_inet6", S_IRUGO
, &if6_fops
))
3326 static void __net_exit
if6_proc_net_exit(struct net
*net
)
3328 proc_net_remove(net
, "if_inet6");
3331 static struct pernet_operations if6_proc_net_ops
= {
3332 .init
= if6_proc_net_init
,
3333 .exit
= if6_proc_net_exit
,
3336 int __init
if6_proc_init(void)
3338 return register_pernet_subsys(&if6_proc_net_ops
);
3341 void if6_proc_exit(void)
3343 unregister_pernet_subsys(&if6_proc_net_ops
);
3345 #endif /* CONFIG_PROC_FS */
3347 #if IS_ENABLED(CONFIG_IPV6_MIP6)
3348 /* Check if address is a home address configured on any interface. */
3349 int ipv6_chk_home_addr(struct net
*net
, const struct in6_addr
*addr
)
3352 struct inet6_ifaddr
*ifp
= NULL
;
3353 struct hlist_node
*n
;
3354 unsigned int hash
= inet6_addr_hash(addr
);
3357 hlist_for_each_entry_rcu_bh(ifp
, n
, &inet6_addr_lst
[hash
], addr_lst
) {
3358 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
3360 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
3361 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
3366 rcu_read_unlock_bh();
3372 * Periodic address status verification
3375 static void addrconf_verify(unsigned long foo
)
3377 unsigned long now
, next
, next_sec
, next_sched
;
3378 struct inet6_ifaddr
*ifp
;
3379 struct hlist_node
*node
;
3383 spin_lock(&addrconf_verify_lock
);
3385 next
= round_jiffies_up(now
+ ADDR_CHECK_FREQUENCY
);
3387 del_timer(&addr_chk_timer
);
3389 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
3391 hlist_for_each_entry_rcu_bh(ifp
, node
,
3392 &inet6_addr_lst
[i
], addr_lst
) {
3395 if (ifp
->flags
& IFA_F_PERMANENT
)
3398 spin_lock(&ifp
->lock
);
3399 /* We try to batch several events at once. */
3400 age
= (now
- ifp
->tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
3402 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
3403 age
>= ifp
->valid_lft
) {
3404 spin_unlock(&ifp
->lock
);
3408 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
3409 spin_unlock(&ifp
->lock
);
3411 } else if (age
>= ifp
->prefered_lft
) {
3412 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
3415 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
3417 ifp
->flags
|= IFA_F_DEPRECATED
;
3420 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
3421 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
3423 spin_unlock(&ifp
->lock
);
3428 ipv6_ifa_notify(0, ifp
);
3432 #ifdef CONFIG_IPV6_PRIVACY
3433 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
3434 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
3435 unsigned long regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
3436 ifp
->idev
->cnf
.dad_transmits
*
3437 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
3439 if (age
>= ifp
->prefered_lft
- regen_advance
) {
3440 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
3441 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3442 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3443 if (!ifp
->regen_count
&& ifpub
) {
3446 in6_ifa_hold(ifpub
);
3447 spin_unlock(&ifp
->lock
);
3449 spin_lock(&ifpub
->lock
);
3450 ifpub
->regen_count
= 0;
3451 spin_unlock(&ifpub
->lock
);
3452 ipv6_create_tempaddr(ifpub
, ifp
);
3457 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
3458 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
3459 spin_unlock(&ifp
->lock
);
3462 /* ifp->prefered_lft <= ifp->valid_lft */
3463 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3464 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3465 spin_unlock(&ifp
->lock
);
3470 next_sec
= round_jiffies_up(next
);
3473 /* If rounded timeout is accurate enough, accept it. */
3474 if (time_before(next_sec
, next
+ ADDRCONF_TIMER_FUZZ
))
3475 next_sched
= next_sec
;
3477 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
3478 if (time_before(next_sched
, jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
))
3479 next_sched
= jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
;
3481 ADBG((KERN_DEBUG
"now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
3482 now
, next
, next_sec
, next_sched
));
3484 addr_chk_timer
.expires
= next_sched
;
3485 add_timer(&addr_chk_timer
);
3486 spin_unlock(&addrconf_verify_lock
);
3487 rcu_read_unlock_bh();
3490 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
)
3492 struct in6_addr
*pfx
= NULL
;
3495 pfx
= nla_data(addr
);
3498 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
3501 pfx
= nla_data(local
);
3507 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
3508 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
3509 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
3510 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
3514 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3516 struct net
*net
= sock_net(skb
->sk
);
3517 struct ifaddrmsg
*ifm
;
3518 struct nlattr
*tb
[IFA_MAX
+1];
3519 struct in6_addr
*pfx
;
3522 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3526 ifm
= nlmsg_data(nlh
);
3527 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3531 return inet6_addr_del(net
, ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
3534 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u8 ifa_flags
,
3535 u32 prefered_lft
, u32 valid_lft
)
3539 unsigned long timeout
;
3541 if (!valid_lft
|| (prefered_lft
> valid_lft
))
3544 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
3545 if (addrconf_finite_timeout(timeout
)) {
3546 expires
= jiffies_to_clock_t(timeout
* HZ
);
3547 valid_lft
= timeout
;
3548 flags
= RTF_EXPIRES
;
3552 ifa_flags
|= IFA_F_PERMANENT
;
3555 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
3556 if (addrconf_finite_timeout(timeout
)) {
3558 ifa_flags
|= IFA_F_DEPRECATED
;
3559 prefered_lft
= timeout
;
3562 spin_lock_bh(&ifp
->lock
);
3563 ifp
->flags
= (ifp
->flags
& ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
| IFA_F_HOMEADDRESS
)) | ifa_flags
;
3564 ifp
->tstamp
= jiffies
;
3565 ifp
->valid_lft
= valid_lft
;
3566 ifp
->prefered_lft
= prefered_lft
;
3568 spin_unlock_bh(&ifp
->lock
);
3569 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
3570 ipv6_ifa_notify(0, ifp
);
3572 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
3580 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3582 struct net
*net
= sock_net(skb
->sk
);
3583 struct ifaddrmsg
*ifm
;
3584 struct nlattr
*tb
[IFA_MAX
+1];
3585 struct in6_addr
*pfx
;
3586 struct inet6_ifaddr
*ifa
;
3587 struct net_device
*dev
;
3588 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
3592 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3596 ifm
= nlmsg_data(nlh
);
3597 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3601 if (tb
[IFA_CACHEINFO
]) {
3602 struct ifa_cacheinfo
*ci
;
3604 ci
= nla_data(tb
[IFA_CACHEINFO
]);
3605 valid_lft
= ci
->ifa_valid
;
3606 preferred_lft
= ci
->ifa_prefered
;
3608 preferred_lft
= INFINITY_LIFE_TIME
;
3609 valid_lft
= INFINITY_LIFE_TIME
;
3612 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3616 /* We ignore other flags so far. */
3617 ifa_flags
= ifm
->ifa_flags
& (IFA_F_NODAD
| IFA_F_HOMEADDRESS
);
3619 ifa
= ipv6_get_ifaddr(net
, pfx
, dev
, 1);
3622 * It would be best to check for !NLM_F_CREATE here but
3623 * userspace alreay relies on not having to provide this.
3625 return inet6_addr_add(net
, ifm
->ifa_index
, pfx
,
3626 ifm
->ifa_prefixlen
, ifa_flags
,
3627 preferred_lft
, valid_lft
);
3630 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
3631 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
3634 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
3641 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u8 flags
,
3642 u8 scope
, int ifindex
)
3644 struct ifaddrmsg
*ifm
;
3646 ifm
= nlmsg_data(nlh
);
3647 ifm
->ifa_family
= AF_INET6
;
3648 ifm
->ifa_prefixlen
= prefixlen
;
3649 ifm
->ifa_flags
= flags
;
3650 ifm
->ifa_scope
= scope
;
3651 ifm
->ifa_index
= ifindex
;
3654 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
3655 unsigned long tstamp
, u32 preferred
, u32 valid
)
3657 struct ifa_cacheinfo ci
;
3659 ci
.cstamp
= cstamp_delta(cstamp
);
3660 ci
.tstamp
= cstamp_delta(tstamp
);
3661 ci
.ifa_prefered
= preferred
;
3662 ci
.ifa_valid
= valid
;
3664 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
3667 static inline int rt_scope(int ifa_scope
)
3669 if (ifa_scope
& IFA_HOST
)
3670 return RT_SCOPE_HOST
;
3671 else if (ifa_scope
& IFA_LINK
)
3672 return RT_SCOPE_LINK
;
3673 else if (ifa_scope
& IFA_SITE
)
3674 return RT_SCOPE_SITE
;
3676 return RT_SCOPE_UNIVERSE
;
3679 static inline int inet6_ifaddr_msgsize(void)
3681 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
3682 + nla_total_size(16) /* IFA_ADDRESS */
3683 + nla_total_size(sizeof(struct ifa_cacheinfo
));
3686 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
3687 u32 portid
, u32 seq
, int event
, unsigned int flags
)
3689 struct nlmsghdr
*nlh
;
3690 u32 preferred
, valid
;
3692 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3696 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
3697 ifa
->idev
->dev
->ifindex
);
3699 if (!(ifa
->flags
&IFA_F_PERMANENT
)) {
3700 preferred
= ifa
->prefered_lft
;
3701 valid
= ifa
->valid_lft
;
3702 if (preferred
!= INFINITY_LIFE_TIME
) {
3703 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
3704 if (preferred
> tval
)
3708 if (valid
!= INFINITY_LIFE_TIME
) {
3716 preferred
= INFINITY_LIFE_TIME
;
3717 valid
= INFINITY_LIFE_TIME
;
3720 if (nla_put(skb
, IFA_ADDRESS
, 16, &ifa
->addr
) < 0 ||
3721 put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0) {
3722 nlmsg_cancel(skb
, nlh
);
3726 return nlmsg_end(skb
, nlh
);
3729 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
3730 u32 portid
, u32 seq
, int event
, u16 flags
)
3732 struct nlmsghdr
*nlh
;
3733 u8 scope
= RT_SCOPE_UNIVERSE
;
3734 int ifindex
= ifmca
->idev
->dev
->ifindex
;
3736 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
3737 scope
= RT_SCOPE_SITE
;
3739 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3743 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3744 if (nla_put(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
) < 0 ||
3745 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
3746 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3747 nlmsg_cancel(skb
, nlh
);
3751 return nlmsg_end(skb
, nlh
);
3754 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
3755 u32 portid
, u32 seq
, int event
, unsigned int flags
)
3757 struct nlmsghdr
*nlh
;
3758 u8 scope
= RT_SCOPE_UNIVERSE
;
3759 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
3761 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
3762 scope
= RT_SCOPE_SITE
;
3764 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3768 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3769 if (nla_put(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
) < 0 ||
3770 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
3771 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3772 nlmsg_cancel(skb
, nlh
);
3776 return nlmsg_end(skb
, nlh
);
3785 /* called with rcu_read_lock() */
3786 static int in6_dump_addrs(struct inet6_dev
*idev
, struct sk_buff
*skb
,
3787 struct netlink_callback
*cb
, enum addr_type_t type
,
3788 int s_ip_idx
, int *p_ip_idx
)
3790 struct ifmcaddr6
*ifmca
;
3791 struct ifacaddr6
*ifaca
;
3793 int ip_idx
= *p_ip_idx
;
3795 read_lock_bh(&idev
->lock
);
3797 case UNICAST_ADDR
: {
3798 struct inet6_ifaddr
*ifa
;
3800 /* unicast address incl. temp addr */
3801 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
3802 if (++ip_idx
< s_ip_idx
)
3804 err
= inet6_fill_ifaddr(skb
, ifa
,
3805 NETLINK_CB(cb
->skb
).portid
,
3814 case MULTICAST_ADDR
:
3815 /* multicast address */
3816 for (ifmca
= idev
->mc_list
; ifmca
;
3817 ifmca
= ifmca
->next
, ip_idx
++) {
3818 if (ip_idx
< s_ip_idx
)
3820 err
= inet6_fill_ifmcaddr(skb
, ifmca
,
3821 NETLINK_CB(cb
->skb
).portid
,
3830 /* anycast address */
3831 for (ifaca
= idev
->ac_list
; ifaca
;
3832 ifaca
= ifaca
->aca_next
, ip_idx
++) {
3833 if (ip_idx
< s_ip_idx
)
3835 err
= inet6_fill_ifacaddr(skb
, ifaca
,
3836 NETLINK_CB(cb
->skb
).portid
,
3847 read_unlock_bh(&idev
->lock
);
3852 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3853 enum addr_type_t type
)
3855 struct net
*net
= sock_net(skb
->sk
);
3858 int s_idx
, s_ip_idx
;
3859 struct net_device
*dev
;
3860 struct inet6_dev
*idev
;
3861 struct hlist_head
*head
;
3862 struct hlist_node
*node
;
3865 s_idx
= idx
= cb
->args
[1];
3866 s_ip_idx
= ip_idx
= cb
->args
[2];
3869 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
3871 head
= &net
->dev_index_head
[h
];
3872 hlist_for_each_entry_rcu(dev
, node
, head
, index_hlist
) {
3875 if (h
> s_h
|| idx
> s_idx
)
3878 idev
= __in6_dev_get(dev
);
3882 if (in6_dump_addrs(idev
, skb
, cb
, type
,
3883 s_ip_idx
, &ip_idx
) <= 0)
3893 cb
->args
[2] = ip_idx
;
3898 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3900 enum addr_type_t type
= UNICAST_ADDR
;
3902 return inet6_dump_addr(skb
, cb
, type
);
3905 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3907 enum addr_type_t type
= MULTICAST_ADDR
;
3909 return inet6_dump_addr(skb
, cb
, type
);
3913 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3915 enum addr_type_t type
= ANYCAST_ADDR
;
3917 return inet6_dump_addr(skb
, cb
, type
);
3920 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
*nlh
,
3923 struct net
*net
= sock_net(in_skb
->sk
);
3924 struct ifaddrmsg
*ifm
;
3925 struct nlattr
*tb
[IFA_MAX
+1];
3926 struct in6_addr
*addr
= NULL
;
3927 struct net_device
*dev
= NULL
;
3928 struct inet6_ifaddr
*ifa
;
3929 struct sk_buff
*skb
;
3932 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3936 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3942 ifm
= nlmsg_data(nlh
);
3944 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3946 ifa
= ipv6_get_ifaddr(net
, addr
, dev
, 1);
3948 err
= -EADDRNOTAVAIL
;
3952 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
);
3958 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).portid
,
3959 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
3961 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3962 WARN_ON(err
== -EMSGSIZE
);
3966 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).portid
);
3973 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
3975 struct sk_buff
*skb
;
3976 struct net
*net
= dev_net(ifa
->idev
->dev
);
3979 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
3983 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
3985 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3986 WARN_ON(err
== -EMSGSIZE
);
3990 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
3994 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
3997 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
3998 __s32
*array
, int bytes
)
4000 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
4002 memset(array
, 0, bytes
);
4003 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
4004 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
4005 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
4006 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
4007 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
4008 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
4009 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
4010 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
4011 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] =
4012 jiffies_to_msecs(cnf
->rtr_solicit_interval
);
4013 array
[DEVCONF_RTR_SOLICIT_DELAY
] =
4014 jiffies_to_msecs(cnf
->rtr_solicit_delay
);
4015 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
4016 #ifdef CONFIG_IPV6_PRIVACY
4017 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
4018 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
4019 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
4020 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
4021 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
4023 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
4024 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
4025 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
4026 #ifdef CONFIG_IPV6_ROUTER_PREF
4027 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
4028 array
[DEVCONF_RTR_PROBE_INTERVAL
] =
4029 jiffies_to_msecs(cnf
->rtr_probe_interval
);
4030 #ifdef CONFIG_IPV6_ROUTE_INFO
4031 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
4034 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
4035 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
4036 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4037 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
4039 #ifdef CONFIG_IPV6_MROUTE
4040 array
[DEVCONF_MC_FORWARDING
] = cnf
->mc_forwarding
;
4042 array
[DEVCONF_DISABLE_IPV6
] = cnf
->disable_ipv6
;
4043 array
[DEVCONF_ACCEPT_DAD
] = cnf
->accept_dad
;
4044 array
[DEVCONF_FORCE_TLLAO
] = cnf
->force_tllao
;
4045 array
[DEVCONF_NDISC_NOTIFY
] = cnf
->ndisc_notify
;
4048 static inline size_t inet6_ifla6_size(void)
4050 return nla_total_size(4) /* IFLA_INET6_FLAGS */
4051 + nla_total_size(sizeof(struct ifla_cacheinfo
))
4052 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
4053 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
4054 + nla_total_size(ICMP6_MIB_MAX
* 8); /* IFLA_INET6_ICMP6STATS */
4057 static inline size_t inet6_if_nlmsg_size(void)
4059 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
4060 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
4061 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
4062 + nla_total_size(4) /* IFLA_MTU */
4063 + nla_total_size(4) /* IFLA_LINK */
4064 + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
4067 static inline void __snmp6_fill_statsdev(u64
*stats
, atomic_long_t
*mib
,
4068 int items
, int bytes
)
4071 int pad
= bytes
- sizeof(u64
) * items
;
4074 /* Use put_unaligned() because stats may not be aligned for u64. */
4075 put_unaligned(items
, &stats
[0]);
4076 for (i
= 1; i
< items
; i
++)
4077 put_unaligned(atomic_long_read(&mib
[i
]), &stats
[i
]);
4079 memset(&stats
[items
], 0, pad
);
4082 static inline void __snmp6_fill_stats64(u64
*stats
, void __percpu
**mib
,
4083 int items
, int bytes
, size_t syncpoff
)
4086 int pad
= bytes
- sizeof(u64
) * items
;
4089 /* Use put_unaligned() because stats may not be aligned for u64. */
4090 put_unaligned(items
, &stats
[0]);
4091 for (i
= 1; i
< items
; i
++)
4092 put_unaligned(snmp_fold_field64(mib
, i
, syncpoff
), &stats
[i
]);
4094 memset(&stats
[items
], 0, pad
);
4097 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
4101 case IFLA_INET6_STATS
:
4102 __snmp6_fill_stats64(stats
, (void __percpu
**)idev
->stats
.ipv6
,
4103 IPSTATS_MIB_MAX
, bytes
, offsetof(struct ipstats_mib
, syncp
));
4105 case IFLA_INET6_ICMP6STATS
:
4106 __snmp6_fill_statsdev(stats
, idev
->stats
.icmpv6dev
->mibs
, ICMP6_MIB_MAX
, bytes
);
4111 static int inet6_fill_ifla6_attrs(struct sk_buff
*skb
, struct inet6_dev
*idev
)
4114 struct ifla_cacheinfo ci
;
4116 if (nla_put_u32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
))
4117 goto nla_put_failure
;
4118 ci
.max_reasm_len
= IPV6_MAXPLEN
;
4119 ci
.tstamp
= cstamp_delta(idev
->tstamp
);
4120 ci
.reachable_time
= jiffies_to_msecs(idev
->nd_parms
->reachable_time
);
4121 ci
.retrans_time
= jiffies_to_msecs(idev
->nd_parms
->retrans_time
);
4122 if (nla_put(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
))
4123 goto nla_put_failure
;
4124 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
4126 goto nla_put_failure
;
4127 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
4129 /* XXX - MC not implemented */
4131 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
4133 goto nla_put_failure
;
4134 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
4136 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
4138 goto nla_put_failure
;
4139 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
4147 static size_t inet6_get_link_af_size(const struct net_device
*dev
)
4149 if (!__in6_dev_get(dev
))
4152 return inet6_ifla6_size();
4155 static int inet6_fill_link_af(struct sk_buff
*skb
, const struct net_device
*dev
)
4157 struct inet6_dev
*idev
= __in6_dev_get(dev
);
4162 if (inet6_fill_ifla6_attrs(skb
, idev
) < 0)
4168 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
4169 u32 portid
, u32 seq
, int event
, unsigned int flags
)
4171 struct net_device
*dev
= idev
->dev
;
4172 struct ifinfomsg
*hdr
;
4173 struct nlmsghdr
*nlh
;
4176 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*hdr
), flags
);
4180 hdr
= nlmsg_data(nlh
);
4181 hdr
->ifi_family
= AF_INET6
;
4183 hdr
->ifi_type
= dev
->type
;
4184 hdr
->ifi_index
= dev
->ifindex
;
4185 hdr
->ifi_flags
= dev_get_flags(dev
);
4186 hdr
->ifi_change
= 0;
4188 if (nla_put_string(skb
, IFLA_IFNAME
, dev
->name
) ||
4190 nla_put(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
)) ||
4191 nla_put_u32(skb
, IFLA_MTU
, dev
->mtu
) ||
4192 (dev
->ifindex
!= dev
->iflink
&&
4193 nla_put_u32(skb
, IFLA_LINK
, dev
->iflink
)))
4194 goto nla_put_failure
;
4195 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
4196 if (protoinfo
== NULL
)
4197 goto nla_put_failure
;
4199 if (inet6_fill_ifla6_attrs(skb
, idev
) < 0)
4200 goto nla_put_failure
;
4202 nla_nest_end(skb
, protoinfo
);
4203 return nlmsg_end(skb
, nlh
);
4206 nlmsg_cancel(skb
, nlh
);
4210 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4212 struct net
*net
= sock_net(skb
->sk
);
4215 struct net_device
*dev
;
4216 struct inet6_dev
*idev
;
4217 struct hlist_head
*head
;
4218 struct hlist_node
*node
;
4221 s_idx
= cb
->args
[1];
4224 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
4226 head
= &net
->dev_index_head
[h
];
4227 hlist_for_each_entry_rcu(dev
, node
, head
, index_hlist
) {
4230 idev
= __in6_dev_get(dev
);
4233 if (inet6_fill_ifinfo(skb
, idev
,
4234 NETLINK_CB(cb
->skb
).portid
,
4236 RTM_NEWLINK
, NLM_F_MULTI
) <= 0)
4250 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
4252 struct sk_buff
*skb
;
4253 struct net
*net
= dev_net(idev
->dev
);
4256 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
4260 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
4262 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
4263 WARN_ON(err
== -EMSGSIZE
);
4267 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFINFO
, NULL
, GFP_ATOMIC
);
4271 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFINFO
, err
);
4274 static inline size_t inet6_prefix_nlmsg_size(void)
4276 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
4277 + nla_total_size(sizeof(struct in6_addr
))
4278 + nla_total_size(sizeof(struct prefix_cacheinfo
));
4281 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
4282 struct prefix_info
*pinfo
, u32 portid
, u32 seq
,
4283 int event
, unsigned int flags
)
4285 struct prefixmsg
*pmsg
;
4286 struct nlmsghdr
*nlh
;
4287 struct prefix_cacheinfo ci
;
4289 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*pmsg
), flags
);
4293 pmsg
= nlmsg_data(nlh
);
4294 pmsg
->prefix_family
= AF_INET6
;
4295 pmsg
->prefix_pad1
= 0;
4296 pmsg
->prefix_pad2
= 0;
4297 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
4298 pmsg
->prefix_len
= pinfo
->prefix_len
;
4299 pmsg
->prefix_type
= pinfo
->type
;
4300 pmsg
->prefix_pad3
= 0;
4301 pmsg
->prefix_flags
= 0;
4303 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
4304 if (pinfo
->autoconf
)
4305 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
4307 if (nla_put(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
))
4308 goto nla_put_failure
;
4309 ci
.preferred_time
= ntohl(pinfo
->prefered
);
4310 ci
.valid_time
= ntohl(pinfo
->valid
);
4311 if (nla_put(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
))
4312 goto nla_put_failure
;
4313 return nlmsg_end(skb
, nlh
);
4316 nlmsg_cancel(skb
, nlh
);
4320 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
4321 struct prefix_info
*pinfo
)
4323 struct sk_buff
*skb
;
4324 struct net
*net
= dev_net(idev
->dev
);
4327 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
4331 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
4333 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
4334 WARN_ON(err
== -EMSGSIZE
);
4338 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
4342 rtnl_set_sk_err(net
, RTNLGRP_IPV6_PREFIX
, err
);
4345 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
4347 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
4352 * If the address was optimistic
4353 * we inserted the route at the start of
4354 * our DAD process, so we don't need
4357 if (!(ifp
->rt
->rt6i_node
))
4358 ip6_ins_rt(ifp
->rt
);
4359 if (ifp
->idev
->cnf
.forwarding
)
4360 addrconf_join_anycast(ifp
);
4363 if (ifp
->idev
->cnf
.forwarding
)
4364 addrconf_leave_anycast(ifp
);
4365 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
4366 dst_hold(&ifp
->rt
->dst
);
4368 if (ip6_del_rt(ifp
->rt
))
4369 dst_free(&ifp
->rt
->dst
);
4374 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
4377 if (likely(ifp
->idev
->dead
== 0))
4378 __ipv6_ifa_notify(event
, ifp
);
4379 rcu_read_unlock_bh();
4382 #ifdef CONFIG_SYSCTL
4385 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
,
4386 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4388 int *valp
= ctl
->data
;
4395 * ctl->data points to idev->cnf.forwarding, we should
4396 * not modify it until we get the rtnl lock.
4401 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
4404 ret
= addrconf_fixup_forwarding(ctl
, valp
, val
);
4410 static void dev_disable_change(struct inet6_dev
*idev
)
4412 if (!idev
|| !idev
->dev
)
4415 if (idev
->cnf
.disable_ipv6
)
4416 addrconf_notify(NULL
, NETDEV_DOWN
, idev
->dev
);
4418 addrconf_notify(NULL
, NETDEV_UP
, idev
->dev
);
4421 static void addrconf_disable_change(struct net
*net
, __s32 newf
)
4423 struct net_device
*dev
;
4424 struct inet6_dev
*idev
;
4427 for_each_netdev_rcu(net
, dev
) {
4428 idev
= __in6_dev_get(dev
);
4430 int changed
= (!idev
->cnf
.disable_ipv6
) ^ (!newf
);
4431 idev
->cnf
.disable_ipv6
= newf
;
4433 dev_disable_change(idev
);
4439 static int addrconf_disable_ipv6(struct ctl_table
*table
, int *p
, int newf
)
4444 if (!rtnl_trylock())
4445 return restart_syscall();
4447 net
= (struct net
*)table
->extra2
;
4451 if (p
== &net
->ipv6
.devconf_dflt
->disable_ipv6
) {
4456 if (p
== &net
->ipv6
.devconf_all
->disable_ipv6
) {
4457 net
->ipv6
.devconf_dflt
->disable_ipv6
= newf
;
4458 addrconf_disable_change(net
, newf
);
4459 } else if ((!newf
) ^ (!old
))
4460 dev_disable_change((struct inet6_dev
*)table
->extra1
);
4467 int addrconf_sysctl_disable(ctl_table
*ctl
, int write
,
4468 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4470 int *valp
= ctl
->data
;
4477 * ctl->data points to idev->cnf.disable_ipv6, we should
4478 * not modify it until we get the rtnl lock.
4483 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
4486 ret
= addrconf_disable_ipv6(ctl
, valp
, val
);
4492 static struct addrconf_sysctl_table
4494 struct ctl_table_header
*sysctl_header
;
4495 ctl_table addrconf_vars
[DEVCONF_MAX
+1];
4496 } addrconf_sysctl __read_mostly
= {
4497 .sysctl_header
= NULL
,
4500 .procname
= "forwarding",
4501 .data
= &ipv6_devconf
.forwarding
,
4502 .maxlen
= sizeof(int),
4504 .proc_handler
= addrconf_sysctl_forward
,
4507 .procname
= "hop_limit",
4508 .data
= &ipv6_devconf
.hop_limit
,
4509 .maxlen
= sizeof(int),
4511 .proc_handler
= proc_dointvec
,
4515 .data
= &ipv6_devconf
.mtu6
,
4516 .maxlen
= sizeof(int),
4518 .proc_handler
= proc_dointvec
,
4521 .procname
= "accept_ra",
4522 .data
= &ipv6_devconf
.accept_ra
,
4523 .maxlen
= sizeof(int),
4525 .proc_handler
= proc_dointvec
,
4528 .procname
= "accept_redirects",
4529 .data
= &ipv6_devconf
.accept_redirects
,
4530 .maxlen
= sizeof(int),
4532 .proc_handler
= proc_dointvec
,
4535 .procname
= "autoconf",
4536 .data
= &ipv6_devconf
.autoconf
,
4537 .maxlen
= sizeof(int),
4539 .proc_handler
= proc_dointvec
,
4542 .procname
= "dad_transmits",
4543 .data
= &ipv6_devconf
.dad_transmits
,
4544 .maxlen
= sizeof(int),
4546 .proc_handler
= proc_dointvec
,
4549 .procname
= "router_solicitations",
4550 .data
= &ipv6_devconf
.rtr_solicits
,
4551 .maxlen
= sizeof(int),
4553 .proc_handler
= proc_dointvec
,
4556 .procname
= "router_solicitation_interval",
4557 .data
= &ipv6_devconf
.rtr_solicit_interval
,
4558 .maxlen
= sizeof(int),
4560 .proc_handler
= proc_dointvec_jiffies
,
4563 .procname
= "router_solicitation_delay",
4564 .data
= &ipv6_devconf
.rtr_solicit_delay
,
4565 .maxlen
= sizeof(int),
4567 .proc_handler
= proc_dointvec_jiffies
,
4570 .procname
= "force_mld_version",
4571 .data
= &ipv6_devconf
.force_mld_version
,
4572 .maxlen
= sizeof(int),
4574 .proc_handler
= proc_dointvec
,
4576 #ifdef CONFIG_IPV6_PRIVACY
4578 .procname
= "use_tempaddr",
4579 .data
= &ipv6_devconf
.use_tempaddr
,
4580 .maxlen
= sizeof(int),
4582 .proc_handler
= proc_dointvec
,
4585 .procname
= "temp_valid_lft",
4586 .data
= &ipv6_devconf
.temp_valid_lft
,
4587 .maxlen
= sizeof(int),
4589 .proc_handler
= proc_dointvec
,
4592 .procname
= "temp_prefered_lft",
4593 .data
= &ipv6_devconf
.temp_prefered_lft
,
4594 .maxlen
= sizeof(int),
4596 .proc_handler
= proc_dointvec
,
4599 .procname
= "regen_max_retry",
4600 .data
= &ipv6_devconf
.regen_max_retry
,
4601 .maxlen
= sizeof(int),
4603 .proc_handler
= proc_dointvec
,
4606 .procname
= "max_desync_factor",
4607 .data
= &ipv6_devconf
.max_desync_factor
,
4608 .maxlen
= sizeof(int),
4610 .proc_handler
= proc_dointvec
,
4614 .procname
= "max_addresses",
4615 .data
= &ipv6_devconf
.max_addresses
,
4616 .maxlen
= sizeof(int),
4618 .proc_handler
= proc_dointvec
,
4621 .procname
= "accept_ra_defrtr",
4622 .data
= &ipv6_devconf
.accept_ra_defrtr
,
4623 .maxlen
= sizeof(int),
4625 .proc_handler
= proc_dointvec
,
4628 .procname
= "accept_ra_pinfo",
4629 .data
= &ipv6_devconf
.accept_ra_pinfo
,
4630 .maxlen
= sizeof(int),
4632 .proc_handler
= proc_dointvec
,
4634 #ifdef CONFIG_IPV6_ROUTER_PREF
4636 .procname
= "accept_ra_rtr_pref",
4637 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
4638 .maxlen
= sizeof(int),
4640 .proc_handler
= proc_dointvec
,
4643 .procname
= "router_probe_interval",
4644 .data
= &ipv6_devconf
.rtr_probe_interval
,
4645 .maxlen
= sizeof(int),
4647 .proc_handler
= proc_dointvec_jiffies
,
4649 #ifdef CONFIG_IPV6_ROUTE_INFO
4651 .procname
= "accept_ra_rt_info_max_plen",
4652 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
4653 .maxlen
= sizeof(int),
4655 .proc_handler
= proc_dointvec
,
4660 .procname
= "proxy_ndp",
4661 .data
= &ipv6_devconf
.proxy_ndp
,
4662 .maxlen
= sizeof(int),
4664 .proc_handler
= proc_dointvec
,
4667 .procname
= "accept_source_route",
4668 .data
= &ipv6_devconf
.accept_source_route
,
4669 .maxlen
= sizeof(int),
4671 .proc_handler
= proc_dointvec
,
4673 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4675 .procname
= "optimistic_dad",
4676 .data
= &ipv6_devconf
.optimistic_dad
,
4677 .maxlen
= sizeof(int),
4679 .proc_handler
= proc_dointvec
,
4683 #ifdef CONFIG_IPV6_MROUTE
4685 .procname
= "mc_forwarding",
4686 .data
= &ipv6_devconf
.mc_forwarding
,
4687 .maxlen
= sizeof(int),
4689 .proc_handler
= proc_dointvec
,
4693 .procname
= "disable_ipv6",
4694 .data
= &ipv6_devconf
.disable_ipv6
,
4695 .maxlen
= sizeof(int),
4697 .proc_handler
= addrconf_sysctl_disable
,
4700 .procname
= "accept_dad",
4701 .data
= &ipv6_devconf
.accept_dad
,
4702 .maxlen
= sizeof(int),
4704 .proc_handler
= proc_dointvec
,
4707 .procname
= "force_tllao",
4708 .data
= &ipv6_devconf
.force_tllao
,
4709 .maxlen
= sizeof(int),
4711 .proc_handler
= proc_dointvec
4714 .procname
= "ndisc_notify",
4715 .data
= &ipv6_devconf
.ndisc_notify
,
4716 .maxlen
= sizeof(int),
4718 .proc_handler
= proc_dointvec
4726 static int __addrconf_sysctl_register(struct net
*net
, char *dev_name
,
4727 struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
4730 struct addrconf_sysctl_table
*t
;
4731 char path
[sizeof("net/ipv6/conf/") + IFNAMSIZ
];
4733 t
= kmemdup(&addrconf_sysctl
, sizeof(*t
), GFP_KERNEL
);
4737 for (i
= 0; t
->addrconf_vars
[i
].data
; i
++) {
4738 t
->addrconf_vars
[i
].data
+= (char *)p
- (char *)&ipv6_devconf
;
4739 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
4740 t
->addrconf_vars
[i
].extra2
= net
;
4743 snprintf(path
, sizeof(path
), "net/ipv6/conf/%s", dev_name
);
4745 t
->sysctl_header
= register_net_sysctl(net
, path
, t
->addrconf_vars
);
4746 if (t
->sysctl_header
== NULL
)
4758 static void __addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
4760 struct addrconf_sysctl_table
*t
;
4762 if (p
->sysctl
== NULL
)
4767 unregister_net_sysctl_table(t
->sysctl_header
);
4771 static void addrconf_sysctl_register(struct inet6_dev
*idev
)
4773 neigh_sysctl_register(idev
->dev
, idev
->nd_parms
, "ipv6",
4774 &ndisc_ifinfo_sysctl_change
);
4775 __addrconf_sysctl_register(dev_net(idev
->dev
), idev
->dev
->name
,
4779 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
4781 __addrconf_sysctl_unregister(&idev
->cnf
);
4782 neigh_sysctl_unregister(idev
->nd_parms
);
4788 static int __net_init
addrconf_init_net(struct net
*net
)
4791 struct ipv6_devconf
*all
, *dflt
;
4794 all
= &ipv6_devconf
;
4795 dflt
= &ipv6_devconf_dflt
;
4797 if (!net_eq(net
, &init_net
)) {
4798 all
= kmemdup(all
, sizeof(ipv6_devconf
), GFP_KERNEL
);
4802 dflt
= kmemdup(dflt
, sizeof(ipv6_devconf_dflt
), GFP_KERNEL
);
4804 goto err_alloc_dflt
;
4806 /* these will be inherited by all namespaces */
4807 dflt
->autoconf
= ipv6_defaults
.autoconf
;
4808 dflt
->disable_ipv6
= ipv6_defaults
.disable_ipv6
;
4811 net
->ipv6
.devconf_all
= all
;
4812 net
->ipv6
.devconf_dflt
= dflt
;
4814 #ifdef CONFIG_SYSCTL
4815 err
= __addrconf_sysctl_register(net
, "all", NULL
, all
);
4819 err
= __addrconf_sysctl_register(net
, "default", NULL
, dflt
);
4825 #ifdef CONFIG_SYSCTL
4827 __addrconf_sysctl_unregister(all
);
4837 static void __net_exit
addrconf_exit_net(struct net
*net
)
4839 #ifdef CONFIG_SYSCTL
4840 __addrconf_sysctl_unregister(net
->ipv6
.devconf_dflt
);
4841 __addrconf_sysctl_unregister(net
->ipv6
.devconf_all
);
4843 if (!net_eq(net
, &init_net
)) {
4844 kfree(net
->ipv6
.devconf_dflt
);
4845 kfree(net
->ipv6
.devconf_all
);
4849 static struct pernet_operations addrconf_ops
= {
4850 .init
= addrconf_init_net
,
4851 .exit
= addrconf_exit_net
,
4858 int register_inet6addr_notifier(struct notifier_block
*nb
)
4860 return atomic_notifier_chain_register(&inet6addr_chain
, nb
);
4862 EXPORT_SYMBOL(register_inet6addr_notifier
);
4864 int unregister_inet6addr_notifier(struct notifier_block
*nb
)
4866 return atomic_notifier_chain_unregister(&inet6addr_chain
, nb
);
4868 EXPORT_SYMBOL(unregister_inet6addr_notifier
);
4870 static struct rtnl_af_ops inet6_ops
= {
4872 .fill_link_af
= inet6_fill_link_af
,
4873 .get_link_af_size
= inet6_get_link_af_size
,
4877 * Init / cleanup code
4880 int __init
addrconf_init(void)
4884 err
= ipv6_addr_label_init();
4886 pr_crit("%s: cannot initialize default policy table: %d\n",
4891 err
= register_pernet_subsys(&addrconf_ops
);
4895 /* The addrconf netdev notifier requires that loopback_dev
4896 * has it's ipv6 private information allocated and setup
4897 * before it can bring up and give link-local addresses
4898 * to other devices which are up.
4900 * Unfortunately, loopback_dev is not necessarily the first
4901 * entry in the global dev_base list of net devices. In fact,
4902 * it is likely to be the very last entry on that list.
4903 * So this causes the notifier registry below to try and
4904 * give link-local addresses to all devices besides loopback_dev
4905 * first, then loopback_dev, which cases all the non-loopback_dev
4906 * devices to fail to get a link-local address.
4908 * So, as a temporary fix, allocate the ipv6 structure for
4909 * loopback_dev first by hand.
4910 * Longer term, all of the dependencies ipv6 has upon the loopback
4911 * device and it being up should be removed.
4914 if (!ipv6_add_dev(init_net
.loopback_dev
))
4920 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
4921 INIT_HLIST_HEAD(&inet6_addr_lst
[i
]);
4923 register_netdevice_notifier(&ipv6_dev_notf
);
4927 err
= rtnl_af_register(&inet6_ops
);
4931 err
= __rtnl_register(PF_INET6
, RTM_GETLINK
, NULL
, inet6_dump_ifinfo
,
4936 /* Only the first call to __rtnl_register can fail */
4937 __rtnl_register(PF_INET6
, RTM_NEWADDR
, inet6_rtm_newaddr
, NULL
, NULL
);
4938 __rtnl_register(PF_INET6
, RTM_DELADDR
, inet6_rtm_deladdr
, NULL
, NULL
);
4939 __rtnl_register(PF_INET6
, RTM_GETADDR
, inet6_rtm_getaddr
,
4940 inet6_dump_ifaddr
, NULL
);
4941 __rtnl_register(PF_INET6
, RTM_GETMULTICAST
, NULL
,
4942 inet6_dump_ifmcaddr
, NULL
);
4943 __rtnl_register(PF_INET6
, RTM_GETANYCAST
, NULL
,
4944 inet6_dump_ifacaddr
, NULL
);
4945 __rtnl_register(PF_INET6
, RTM_GETNETCONF
, inet6_netconf_get_devconf
,
4948 ipv6_addr_label_rtnl_register();
4952 rtnl_af_unregister(&inet6_ops
);
4954 unregister_netdevice_notifier(&ipv6_dev_notf
);
4956 unregister_pernet_subsys(&addrconf_ops
);
4958 ipv6_addr_label_cleanup();
4963 void addrconf_cleanup(void)
4965 struct net_device
*dev
;
4968 unregister_netdevice_notifier(&ipv6_dev_notf
);
4969 unregister_pernet_subsys(&addrconf_ops
);
4970 ipv6_addr_label_cleanup();
4974 __rtnl_af_unregister(&inet6_ops
);
4976 /* clean dev list */
4977 for_each_netdev(&init_net
, dev
) {
4978 if (__in6_dev_get(dev
) == NULL
)
4980 addrconf_ifdown(dev
, 1);
4982 addrconf_ifdown(init_net
.loopback_dev
, 2);
4987 spin_lock_bh(&addrconf_hash_lock
);
4988 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
4989 WARN_ON(!hlist_empty(&inet6_addr_lst
[i
]));
4990 spin_unlock_bh(&addrconf_hash_lock
);
4992 del_timer(&addr_chk_timer
);