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
;
114 static void addrconf_sysctl_register(struct inet6_dev
*idev
);
115 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
);
117 static inline void addrconf_sysctl_register(struct inet6_dev
*idev
)
121 static inline void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
126 #ifdef CONFIG_IPV6_PRIVACY
127 static void __ipv6_regen_rndid(struct inet6_dev
*idev
);
128 static void __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
129 static void ipv6_regen_rndid(unsigned long data
);
132 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
);
133 static int ipv6_count_addresses(struct inet6_dev
*idev
);
136 * Configured unicast address hash table
138 static struct hlist_head inet6_addr_lst
[IN6_ADDR_HSIZE
];
139 static DEFINE_SPINLOCK(addrconf_hash_lock
);
141 static void addrconf_verify(unsigned long);
143 static DEFINE_TIMER(addr_chk_timer
, addrconf_verify
, 0, 0);
144 static DEFINE_SPINLOCK(addrconf_verify_lock
);
146 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
147 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
149 static void addrconf_type_change(struct net_device
*dev
,
150 unsigned long event
);
151 static int addrconf_ifdown(struct net_device
*dev
, int how
);
153 static struct rt6_info
*addrconf_get_prefix_route(const struct in6_addr
*pfx
,
155 const struct net_device
*dev
,
156 u32 flags
, u32 noflags
);
158 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
);
159 static void addrconf_dad_timer(unsigned long data
);
160 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
);
161 static void addrconf_dad_run(struct inet6_dev
*idev
);
162 static void addrconf_rs_timer(unsigned long data
);
163 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
164 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
166 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
167 struct prefix_info
*pinfo
);
168 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
169 struct net_device
*dev
);
171 static ATOMIC_NOTIFIER_HEAD(inet6addr_chain
);
173 static struct ipv6_devconf ipv6_devconf __read_mostly
= {
175 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
176 .mtu6
= IPV6_MIN_MTU
,
178 .accept_redirects
= 1,
180 .force_mld_version
= 0,
182 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
183 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
184 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
185 #ifdef CONFIG_IPV6_PRIVACY
187 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
188 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
189 .regen_max_retry
= REGEN_MAX_RETRY
,
190 .max_desync_factor
= MAX_DESYNC_FACTOR
,
192 .max_addresses
= IPV6_MAX_ADDRESSES
,
193 .accept_ra_defrtr
= 1,
194 .accept_ra_pinfo
= 1,
195 #ifdef CONFIG_IPV6_ROUTER_PREF
196 .accept_ra_rtr_pref
= 1,
197 .rtr_probe_interval
= 60 * HZ
,
198 #ifdef CONFIG_IPV6_ROUTE_INFO
199 .accept_ra_rt_info_max_plen
= 0,
203 .accept_source_route
= 0, /* we do not accept RH0 by default. */
208 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly
= {
210 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
211 .mtu6
= IPV6_MIN_MTU
,
213 .accept_redirects
= 1,
216 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
217 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
218 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
219 #ifdef CONFIG_IPV6_PRIVACY
221 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
222 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
223 .regen_max_retry
= REGEN_MAX_RETRY
,
224 .max_desync_factor
= MAX_DESYNC_FACTOR
,
226 .max_addresses
= IPV6_MAX_ADDRESSES
,
227 .accept_ra_defrtr
= 1,
228 .accept_ra_pinfo
= 1,
229 #ifdef CONFIG_IPV6_ROUTER_PREF
230 .accept_ra_rtr_pref
= 1,
231 .rtr_probe_interval
= 60 * HZ
,
232 #ifdef CONFIG_IPV6_ROUTE_INFO
233 .accept_ra_rt_info_max_plen
= 0,
237 .accept_source_route
= 0, /* we do not accept RH0 by default. */
242 /* IPv6 Wildcard Address and Loopback Address defined by RFC2553 */
243 const struct in6_addr in6addr_any
= IN6ADDR_ANY_INIT
;
244 const struct in6_addr in6addr_loopback
= IN6ADDR_LOOPBACK_INIT
;
245 const struct in6_addr in6addr_linklocal_allnodes
= IN6ADDR_LINKLOCAL_ALLNODES_INIT
;
246 const struct in6_addr in6addr_linklocal_allrouters
= IN6ADDR_LINKLOCAL_ALLROUTERS_INIT
;
247 const struct in6_addr in6addr_interfacelocal_allnodes
= IN6ADDR_INTERFACELOCAL_ALLNODES_INIT
;
248 const struct in6_addr in6addr_interfacelocal_allrouters
= IN6ADDR_INTERFACELOCAL_ALLROUTERS_INIT
;
249 const struct in6_addr in6addr_sitelocal_allrouters
= IN6ADDR_SITELOCAL_ALLROUTERS_INIT
;
251 /* Check if a valid qdisc is available */
252 static inline bool addrconf_qdisc_ok(const struct net_device
*dev
)
254 return !qdisc_tx_is_noop(dev
);
257 static void addrconf_del_timer(struct inet6_ifaddr
*ifp
)
259 if (del_timer(&ifp
->timer
))
263 enum addrconf_timer_t
{
269 static void addrconf_mod_timer(struct inet6_ifaddr
*ifp
,
270 enum addrconf_timer_t what
,
273 if (!del_timer(&ifp
->timer
))
278 ifp
->timer
.function
= addrconf_dad_timer
;
281 ifp
->timer
.function
= addrconf_rs_timer
;
286 ifp
->timer
.expires
= jiffies
+ when
;
287 add_timer(&ifp
->timer
);
290 static int snmp6_alloc_dev(struct inet6_dev
*idev
)
292 if (snmp_mib_init((void __percpu
**)idev
->stats
.ipv6
,
293 sizeof(struct ipstats_mib
),
294 __alignof__(struct ipstats_mib
)) < 0)
296 idev
->stats
.icmpv6dev
= kzalloc(sizeof(struct icmpv6_mib_device
),
298 if (!idev
->stats
.icmpv6dev
)
300 idev
->stats
.icmpv6msgdev
= kzalloc(sizeof(struct icmpv6msg_mib_device
),
302 if (!idev
->stats
.icmpv6msgdev
)
308 kfree(idev
->stats
.icmpv6dev
);
310 snmp_mib_free((void __percpu
**)idev
->stats
.ipv6
);
315 static void snmp6_free_dev(struct inet6_dev
*idev
)
317 kfree(idev
->stats
.icmpv6msgdev
);
318 kfree(idev
->stats
.icmpv6dev
);
319 snmp_mib_free((void __percpu
**)idev
->stats
.ipv6
);
322 /* Nobody refers to this device, we may destroy it. */
324 void in6_dev_finish_destroy(struct inet6_dev
*idev
)
326 struct net_device
*dev
= idev
->dev
;
328 WARN_ON(!list_empty(&idev
->addr_list
));
329 WARN_ON(idev
->mc_list
!= NULL
);
331 #ifdef NET_REFCNT_DEBUG
332 pr_debug("%s: %s\n", __func__
, dev
? dev
->name
: "NIL");
336 pr_warn("Freeing alive inet6 device %p\n", idev
);
339 snmp6_free_dev(idev
);
340 kfree_rcu(idev
, rcu
);
342 EXPORT_SYMBOL(in6_dev_finish_destroy
);
344 static struct inet6_dev
*ipv6_add_dev(struct net_device
*dev
)
346 struct inet6_dev
*ndev
;
350 if (dev
->mtu
< IPV6_MIN_MTU
)
353 ndev
= kzalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
358 rwlock_init(&ndev
->lock
);
360 INIT_LIST_HEAD(&ndev
->addr_list
);
362 memcpy(&ndev
->cnf
, dev_net(dev
)->ipv6
.devconf_dflt
, sizeof(ndev
->cnf
));
363 ndev
->cnf
.mtu6
= dev
->mtu
;
364 ndev
->cnf
.sysctl
= NULL
;
365 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
366 if (ndev
->nd_parms
== NULL
) {
370 if (ndev
->cnf
.forwarding
)
371 dev_disable_lro(dev
);
372 /* We refer to the device */
375 if (snmp6_alloc_dev(ndev
) < 0) {
377 "%s: cannot allocate memory for statistics; dev=%s.\n",
378 __func__
, dev
->name
));
379 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
385 if (snmp6_register_dev(ndev
) < 0) {
387 "%s: cannot create /proc/net/dev_snmp6/%s\n",
388 __func__
, dev
->name
));
389 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
391 in6_dev_finish_destroy(ndev
);
395 /* One reference from device. We must do this before
396 * we invoke __ipv6_regen_rndid().
400 if (dev
->flags
& (IFF_NOARP
| IFF_LOOPBACK
))
401 ndev
->cnf
.accept_dad
= -1;
403 #if IS_ENABLED(CONFIG_IPV6_SIT)
404 if (dev
->type
== ARPHRD_SIT
&& (dev
->priv_flags
& IFF_ISATAP
)) {
405 pr_info("%s: Disabled Multicast RS\n", dev
->name
);
406 ndev
->cnf
.rtr_solicits
= 0;
410 #ifdef CONFIG_IPV6_PRIVACY
411 INIT_LIST_HEAD(&ndev
->tempaddr_list
);
412 setup_timer(&ndev
->regen_timer
, ipv6_regen_rndid
, (unsigned long)ndev
);
413 if ((dev
->flags
&IFF_LOOPBACK
) ||
414 dev
->type
== ARPHRD_TUNNEL
||
415 dev
->type
== ARPHRD_TUNNEL6
||
416 dev
->type
== ARPHRD_SIT
||
417 dev
->type
== ARPHRD_NONE
) {
418 ndev
->cnf
.use_tempaddr
= -1;
421 ipv6_regen_rndid((unsigned long) ndev
);
425 if (netif_running(dev
) && addrconf_qdisc_ok(dev
))
426 ndev
->if_flags
|= IF_READY
;
428 ipv6_mc_init_dev(ndev
);
429 ndev
->tstamp
= jiffies
;
430 addrconf_sysctl_register(ndev
);
431 /* protected by rtnl_lock */
432 rcu_assign_pointer(dev
->ip6_ptr
, ndev
);
434 /* Join interface-local all-node multicast group */
435 ipv6_dev_mc_inc(dev
, &in6addr_interfacelocal_allnodes
);
437 /* Join all-node multicast group */
438 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allnodes
);
440 /* Join all-router multicast group if forwarding is set */
441 if (ndev
->cnf
.forwarding
&& (dev
->flags
& IFF_MULTICAST
))
442 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
447 static struct inet6_dev
*ipv6_find_idev(struct net_device
*dev
)
449 struct inet6_dev
*idev
;
453 idev
= __in6_dev_get(dev
);
455 idev
= ipv6_add_dev(dev
);
460 if (dev
->flags
&IFF_UP
)
465 static int inet6_netconf_msgsize_devconf(int type
)
467 int size
= NLMSG_ALIGN(sizeof(struct netconfmsg
))
468 + nla_total_size(4); /* NETCONFA_IFINDEX */
470 /* type -1 is used for ALL */
471 if (type
== -1 || type
== NETCONFA_FORWARDING
)
472 size
+= nla_total_size(4);
473 #ifdef CONFIG_IPV6_MROUTE
474 if (type
== -1 || type
== NETCONFA_MC_FORWARDING
)
475 size
+= nla_total_size(4);
481 static int inet6_netconf_fill_devconf(struct sk_buff
*skb
, int ifindex
,
482 struct ipv6_devconf
*devconf
, u32 portid
,
483 u32 seq
, int event
, unsigned int flags
,
486 struct nlmsghdr
*nlh
;
487 struct netconfmsg
*ncm
;
489 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct netconfmsg
),
494 ncm
= nlmsg_data(nlh
);
495 ncm
->ncm_family
= AF_INET6
;
497 if (nla_put_s32(skb
, NETCONFA_IFINDEX
, ifindex
) < 0)
498 goto nla_put_failure
;
500 /* type -1 is used for ALL */
501 if ((type
== -1 || type
== NETCONFA_FORWARDING
) &&
502 nla_put_s32(skb
, NETCONFA_FORWARDING
, devconf
->forwarding
) < 0)
503 goto nla_put_failure
;
504 #ifdef CONFIG_IPV6_MROUTE
505 if ((type
== -1 || type
== NETCONFA_MC_FORWARDING
) &&
506 nla_put_s32(skb
, NETCONFA_MC_FORWARDING
,
507 devconf
->mc_forwarding
) < 0)
508 goto nla_put_failure
;
510 return nlmsg_end(skb
, nlh
);
513 nlmsg_cancel(skb
, nlh
);
517 void inet6_netconf_notify_devconf(struct net
*net
, int type
, int ifindex
,
518 struct ipv6_devconf
*devconf
)
523 skb
= nlmsg_new(inet6_netconf_msgsize_devconf(type
), GFP_ATOMIC
);
527 err
= inet6_netconf_fill_devconf(skb
, ifindex
, devconf
, 0, 0,
528 RTM_NEWNETCONF
, 0, type
);
530 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
531 WARN_ON(err
== -EMSGSIZE
);
535 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_NETCONF
, NULL
, GFP_ATOMIC
);
538 rtnl_set_sk_err(net
, RTNLGRP_IPV6_NETCONF
, err
);
541 static const struct nla_policy devconf_ipv6_policy
[NETCONFA_MAX
+1] = {
542 [NETCONFA_IFINDEX
] = { .len
= sizeof(int) },
543 [NETCONFA_FORWARDING
] = { .len
= sizeof(int) },
546 static int inet6_netconf_get_devconf(struct sk_buff
*in_skb
,
547 struct nlmsghdr
*nlh
,
550 struct net
*net
= sock_net(in_skb
->sk
);
551 struct nlattr
*tb
[NETCONFA_MAX
+1];
552 struct netconfmsg
*ncm
;
554 struct ipv6_devconf
*devconf
;
555 struct inet6_dev
*in6_dev
;
556 struct net_device
*dev
;
560 err
= nlmsg_parse(nlh
, sizeof(*ncm
), tb
, NETCONFA_MAX
,
561 devconf_ipv6_policy
);
566 if (!tb
[NETCONFA_IFINDEX
])
569 ifindex
= nla_get_s32(tb
[NETCONFA_IFINDEX
]);
571 case NETCONFA_IFINDEX_ALL
:
572 devconf
= net
->ipv6
.devconf_all
;
574 case NETCONFA_IFINDEX_DEFAULT
:
575 devconf
= net
->ipv6
.devconf_dflt
;
578 dev
= __dev_get_by_index(net
, ifindex
);
581 in6_dev
= __in6_dev_get(dev
);
584 devconf
= &in6_dev
->cnf
;
589 skb
= nlmsg_new(inet6_netconf_msgsize_devconf(-1), GFP_ATOMIC
);
593 err
= inet6_netconf_fill_devconf(skb
, ifindex
, devconf
,
594 NETLINK_CB(in_skb
).portid
,
595 nlh
->nlmsg_seq
, RTM_NEWNETCONF
, 0,
598 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
599 WARN_ON(err
== -EMSGSIZE
);
603 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).portid
);
609 static void dev_forward_change(struct inet6_dev
*idev
)
611 struct net_device
*dev
;
612 struct inet6_ifaddr
*ifa
;
617 if (idev
->cnf
.forwarding
)
618 dev_disable_lro(dev
);
619 if (dev
->flags
& IFF_MULTICAST
) {
620 if (idev
->cnf
.forwarding
) {
621 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
622 ipv6_dev_mc_inc(dev
, &in6addr_interfacelocal_allrouters
);
623 ipv6_dev_mc_inc(dev
, &in6addr_sitelocal_allrouters
);
625 ipv6_dev_mc_dec(dev
, &in6addr_linklocal_allrouters
);
626 ipv6_dev_mc_dec(dev
, &in6addr_interfacelocal_allrouters
);
627 ipv6_dev_mc_dec(dev
, &in6addr_sitelocal_allrouters
);
631 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
632 if (ifa
->flags
&IFA_F_TENTATIVE
)
634 if (idev
->cnf
.forwarding
)
635 addrconf_join_anycast(ifa
);
637 addrconf_leave_anycast(ifa
);
639 inet6_netconf_notify_devconf(dev_net(dev
), NETCONFA_FORWARDING
,
640 dev
->ifindex
, &idev
->cnf
);
644 static void addrconf_forward_change(struct net
*net
, __s32 newf
)
646 struct net_device
*dev
;
647 struct inet6_dev
*idev
;
649 for_each_netdev(net
, dev
) {
650 idev
= __in6_dev_get(dev
);
652 int changed
= (!idev
->cnf
.forwarding
) ^ (!newf
);
653 idev
->cnf
.forwarding
= newf
;
655 dev_forward_change(idev
);
660 static int addrconf_fixup_forwarding(struct ctl_table
*table
, int *p
, int newf
)
666 return restart_syscall();
668 net
= (struct net
*)table
->extra2
;
672 if (p
== &net
->ipv6
.devconf_dflt
->forwarding
) {
673 if ((!newf
) ^ (!old
))
674 inet6_netconf_notify_devconf(net
, NETCONFA_FORWARDING
,
675 NETCONFA_IFINDEX_DEFAULT
,
676 net
->ipv6
.devconf_dflt
);
681 if (p
== &net
->ipv6
.devconf_all
->forwarding
) {
682 net
->ipv6
.devconf_dflt
->forwarding
= newf
;
683 addrconf_forward_change(net
, newf
);
684 if ((!newf
) ^ (!old
))
685 inet6_netconf_notify_devconf(net
, NETCONFA_FORWARDING
,
686 NETCONFA_IFINDEX_ALL
,
687 net
->ipv6
.devconf_all
);
688 } else if ((!newf
) ^ (!old
))
689 dev_forward_change((struct inet6_dev
*)table
->extra1
);
693 rt6_purge_dflt_routers(net
);
698 /* Nobody refers to this ifaddr, destroy it */
699 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
701 WARN_ON(!hlist_unhashed(&ifp
->addr_lst
));
703 #ifdef NET_REFCNT_DEBUG
704 pr_debug("%s\n", __func__
);
707 in6_dev_put(ifp
->idev
);
709 if (del_timer(&ifp
->timer
))
710 pr_notice("Timer is still running, when freeing ifa=%p\n", ifp
);
712 if (ifp
->state
!= INET6_IFADDR_STATE_DEAD
) {
713 pr_warn("Freeing alive inet6 address %p\n", ifp
);
722 ipv6_link_dev_addr(struct inet6_dev
*idev
, struct inet6_ifaddr
*ifp
)
725 int ifp_scope
= ipv6_addr_src_scope(&ifp
->addr
);
728 * Each device address list is sorted in order of scope -
729 * global before linklocal.
731 list_for_each(p
, &idev
->addr_list
) {
732 struct inet6_ifaddr
*ifa
733 = list_entry(p
, struct inet6_ifaddr
, if_list
);
734 if (ifp_scope
>= ipv6_addr_src_scope(&ifa
->addr
))
738 list_add_tail(&ifp
->if_list
, p
);
741 static u32
inet6_addr_hash(const struct in6_addr
*addr
)
743 return hash_32(ipv6_addr_hash(addr
), IN6_ADDR_HSIZE_SHIFT
);
746 /* On success it returns ifp with increased reference count */
748 static struct inet6_ifaddr
*
749 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
, int pfxlen
,
750 int scope
, u32 flags
)
752 struct inet6_ifaddr
*ifa
= NULL
;
756 int addr_type
= ipv6_addr_type(addr
);
758 if (addr_type
== IPV6_ADDR_ANY
||
759 addr_type
& IPV6_ADDR_MULTICAST
||
760 (!(idev
->dev
->flags
& IFF_LOOPBACK
) &&
761 addr_type
& IPV6_ADDR_LOOPBACK
))
762 return ERR_PTR(-EADDRNOTAVAIL
);
766 err
= -ENODEV
; /*XXX*/
770 if (idev
->cnf
.disable_ipv6
) {
775 spin_lock(&addrconf_hash_lock
);
777 /* Ignore adding duplicate addresses on an interface */
778 if (ipv6_chk_same_addr(dev_net(idev
->dev
), addr
, idev
->dev
)) {
779 ADBG(("ipv6_add_addr: already assigned\n"));
784 ifa
= kzalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
787 ADBG(("ipv6_add_addr: malloc failed\n"));
792 rt
= addrconf_dst_alloc(idev
, addr
, false);
800 spin_lock_init(&ifa
->lock
);
801 spin_lock_init(&ifa
->state_lock
);
802 init_timer(&ifa
->timer
);
803 INIT_HLIST_NODE(&ifa
->addr_lst
);
804 ifa
->timer
.data
= (unsigned long) ifa
;
806 ifa
->prefix_len
= pfxlen
;
807 ifa
->flags
= flags
| IFA_F_TENTATIVE
;
808 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
817 /* Add to big hash table */
818 hash
= inet6_addr_hash(addr
);
820 hlist_add_head_rcu(&ifa
->addr_lst
, &inet6_addr_lst
[hash
]);
821 spin_unlock(&addrconf_hash_lock
);
823 write_lock(&idev
->lock
);
824 /* Add to inet6_dev unicast addr list. */
825 ipv6_link_dev_addr(idev
, ifa
);
827 #ifdef CONFIG_IPV6_PRIVACY
828 if (ifa
->flags
&IFA_F_TEMPORARY
) {
829 list_add(&ifa
->tmp_list
, &idev
->tempaddr_list
);
835 write_unlock(&idev
->lock
);
837 rcu_read_unlock_bh();
839 if (likely(err
== 0))
840 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_UP
, ifa
);
848 spin_unlock(&addrconf_hash_lock
);
852 /* This function wants to get referenced ifp and releases it before return */
854 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
856 struct inet6_ifaddr
*ifa
, *ifn
;
857 struct inet6_dev
*idev
= ifp
->idev
;
859 int deleted
= 0, onlink
= 0;
860 unsigned long expires
= jiffies
;
862 spin_lock_bh(&ifp
->state_lock
);
864 ifp
->state
= INET6_IFADDR_STATE_DEAD
;
865 spin_unlock_bh(&ifp
->state_lock
);
867 if (state
== INET6_IFADDR_STATE_DEAD
)
870 spin_lock_bh(&addrconf_hash_lock
);
871 hlist_del_init_rcu(&ifp
->addr_lst
);
872 spin_unlock_bh(&addrconf_hash_lock
);
874 write_lock_bh(&idev
->lock
);
875 #ifdef CONFIG_IPV6_PRIVACY
876 if (ifp
->flags
&IFA_F_TEMPORARY
) {
877 list_del(&ifp
->tmp_list
);
879 in6_ifa_put(ifp
->ifpub
);
886 list_for_each_entry_safe(ifa
, ifn
, &idev
->addr_list
, if_list
) {
888 list_del_init(&ifp
->if_list
);
891 if (!(ifp
->flags
& IFA_F_PERMANENT
) || onlink
> 0)
895 } else if (ifp
->flags
& IFA_F_PERMANENT
) {
896 if (ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
898 if (ifa
->flags
& IFA_F_PERMANENT
) {
903 unsigned long lifetime
;
908 spin_lock(&ifa
->lock
);
910 lifetime
= addrconf_timeout_fixup(ifa
->valid_lft
, HZ
);
912 * Note: Because this address is
913 * not permanent, lifetime <
914 * LONG_MAX / HZ here.
916 if (time_before(expires
,
917 ifa
->tstamp
+ lifetime
* HZ
))
918 expires
= ifa
->tstamp
+ lifetime
* HZ
;
919 spin_unlock(&ifa
->lock
);
924 write_unlock_bh(&idev
->lock
);
926 addrconf_del_timer(ifp
);
928 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
930 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifp
);
933 * Purge or update corresponding prefix
935 * 1) we don't purge prefix here if address was not permanent.
936 * prefix is managed by its own lifetime.
937 * 2) if there're no addresses, delete prefix.
938 * 3) if there're still other permanent address(es),
939 * corresponding prefix is still permanent.
940 * 4) otherwise, update prefix lifetime to the
941 * longest valid lifetime among the corresponding
942 * addresses on the device.
943 * Note: subsequent RA will update lifetime.
947 if ((ifp
->flags
& IFA_F_PERMANENT
) && onlink
< 1) {
948 struct in6_addr prefix
;
951 ipv6_addr_prefix(&prefix
, &ifp
->addr
, ifp
->prefix_len
);
953 rt
= addrconf_get_prefix_route(&prefix
,
956 0, RTF_GATEWAY
| RTF_DEFAULT
);
962 } else if (!(rt
->rt6i_flags
& RTF_EXPIRES
)) {
963 rt6_set_expires(rt
, expires
);
969 /* clean up prefsrc entries */
970 rt6_remove_prefsrc(ifp
);
975 #ifdef CONFIG_IPV6_PRIVACY
976 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
978 struct inet6_dev
*idev
= ifp
->idev
;
979 struct in6_addr addr
, *tmpaddr
;
980 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_tstamp
, age
;
981 unsigned long regen_advance
;
986 unsigned long now
= jiffies
;
988 write_lock(&idev
->lock
);
990 spin_lock_bh(&ift
->lock
);
991 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
992 spin_unlock_bh(&ift
->lock
);
999 if (idev
->cnf
.use_tempaddr
<= 0) {
1000 write_unlock(&idev
->lock
);
1001 pr_info("%s: use_tempaddr is disabled\n", __func__
);
1006 spin_lock_bh(&ifp
->lock
);
1007 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
1008 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
1009 spin_unlock_bh(&ifp
->lock
);
1010 write_unlock(&idev
->lock
);
1011 pr_warn("%s: regeneration time exceeded - disabled temporary address support\n",
1018 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
1019 __ipv6_try_regen_rndid(idev
, tmpaddr
);
1020 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
1021 age
= (now
- ifp
->tstamp
) / HZ
;
1022 tmp_valid_lft
= min_t(__u32
,
1024 idev
->cnf
.temp_valid_lft
+ age
);
1025 tmp_prefered_lft
= min_t(__u32
,
1027 idev
->cnf
.temp_prefered_lft
+ age
-
1028 idev
->cnf
.max_desync_factor
);
1029 tmp_plen
= ifp
->prefix_len
;
1030 max_addresses
= idev
->cnf
.max_addresses
;
1031 tmp_tstamp
= ifp
->tstamp
;
1032 spin_unlock_bh(&ifp
->lock
);
1034 regen_advance
= idev
->cnf
.regen_max_retry
*
1035 idev
->cnf
.dad_transmits
*
1036 idev
->nd_parms
->retrans_time
/ HZ
;
1037 write_unlock(&idev
->lock
);
1039 /* A temporary address is created only if this calculated Preferred
1040 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
1041 * an implementation must not create a temporary address with a zero
1042 * Preferred Lifetime.
1044 if (tmp_prefered_lft
<= regen_advance
) {
1051 addr_flags
= IFA_F_TEMPORARY
;
1052 /* set in addrconf_prefix_rcv() */
1053 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
1054 addr_flags
|= IFA_F_OPTIMISTIC
;
1056 ift
= !max_addresses
||
1057 ipv6_count_addresses(idev
) < max_addresses
?
1058 ipv6_add_addr(idev
, &addr
, tmp_plen
,
1059 ipv6_addr_type(&addr
)&IPV6_ADDR_SCOPE_MASK
,
1061 if (IS_ERR_OR_NULL(ift
)) {
1064 pr_info("%s: retry temporary address regeneration\n", __func__
);
1066 write_lock(&idev
->lock
);
1070 spin_lock_bh(&ift
->lock
);
1072 ift
->valid_lft
= tmp_valid_lft
;
1073 ift
->prefered_lft
= tmp_prefered_lft
;
1075 ift
->tstamp
= tmp_tstamp
;
1076 spin_unlock_bh(&ift
->lock
);
1078 addrconf_dad_start(ift
);
1087 * Choose an appropriate source address (RFC3484)
1090 IPV6_SADDR_RULE_INIT
= 0,
1091 IPV6_SADDR_RULE_LOCAL
,
1092 IPV6_SADDR_RULE_SCOPE
,
1093 IPV6_SADDR_RULE_PREFERRED
,
1094 #ifdef CONFIG_IPV6_MIP6
1095 IPV6_SADDR_RULE_HOA
,
1097 IPV6_SADDR_RULE_OIF
,
1098 IPV6_SADDR_RULE_LABEL
,
1099 #ifdef CONFIG_IPV6_PRIVACY
1100 IPV6_SADDR_RULE_PRIVACY
,
1102 IPV6_SADDR_RULE_ORCHID
,
1103 IPV6_SADDR_RULE_PREFIX
,
1107 struct ipv6_saddr_score
{
1110 struct inet6_ifaddr
*ifa
;
1111 DECLARE_BITMAP(scorebits
, IPV6_SADDR_RULE_MAX
);
1116 struct ipv6_saddr_dst
{
1117 const struct in6_addr
*addr
;
1124 static inline int ipv6_saddr_preferred(int type
)
1126 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|IPV6_ADDR_LOOPBACK
))
1131 static int ipv6_get_saddr_eval(struct net
*net
,
1132 struct ipv6_saddr_score
*score
,
1133 struct ipv6_saddr_dst
*dst
,
1138 if (i
<= score
->rule
) {
1140 case IPV6_SADDR_RULE_SCOPE
:
1141 ret
= score
->scopedist
;
1143 case IPV6_SADDR_RULE_PREFIX
:
1144 ret
= score
->matchlen
;
1147 ret
= !!test_bit(i
, score
->scorebits
);
1153 case IPV6_SADDR_RULE_INIT
:
1154 /* Rule 0: remember if hiscore is not ready yet */
1157 case IPV6_SADDR_RULE_LOCAL
:
1158 /* Rule 1: Prefer same address */
1159 ret
= ipv6_addr_equal(&score
->ifa
->addr
, dst
->addr
);
1161 case IPV6_SADDR_RULE_SCOPE
:
1162 /* Rule 2: Prefer appropriate scope
1167 * ---+--+-+---> scope
1169 * | d is scope of the destination.
1171 * | \ <- smaller scope is better if
1172 * B-15 | \ if scope is enough for destinaion.
1173 * | ret = B - scope (-1 <= scope >= d <= 15).
1175 * |/ <- greater is better
1176 * -C / if scope is not enough for destination.
1177 * /| ret = scope - C (-1 <= d < scope <= 15).
1179 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1180 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1181 * Assume B = 0 and we get C > 29.
1183 ret
= __ipv6_addr_src_scope(score
->addr_type
);
1184 if (ret
>= dst
->scope
)
1187 ret
-= 128; /* 30 is enough */
1188 score
->scopedist
= ret
;
1190 case IPV6_SADDR_RULE_PREFERRED
:
1191 /* Rule 3: Avoid deprecated and optimistic addresses */
1192 ret
= ipv6_saddr_preferred(score
->addr_type
) ||
1193 !(score
->ifa
->flags
& (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
));
1195 #ifdef CONFIG_IPV6_MIP6
1196 case IPV6_SADDR_RULE_HOA
:
1198 /* Rule 4: Prefer home address */
1199 int prefhome
= !(dst
->prefs
& IPV6_PREFER_SRC_COA
);
1200 ret
= !(score
->ifa
->flags
& IFA_F_HOMEADDRESS
) ^ prefhome
;
1204 case IPV6_SADDR_RULE_OIF
:
1205 /* Rule 5: Prefer outgoing interface */
1206 ret
= (!dst
->ifindex
||
1207 dst
->ifindex
== score
->ifa
->idev
->dev
->ifindex
);
1209 case IPV6_SADDR_RULE_LABEL
:
1210 /* Rule 6: Prefer matching label */
1211 ret
= ipv6_addr_label(net
,
1212 &score
->ifa
->addr
, score
->addr_type
,
1213 score
->ifa
->idev
->dev
->ifindex
) == dst
->label
;
1215 #ifdef CONFIG_IPV6_PRIVACY
1216 case IPV6_SADDR_RULE_PRIVACY
:
1218 /* Rule 7: Prefer public address
1219 * Note: prefer temporary address if use_tempaddr >= 2
1221 int preftmp
= dst
->prefs
& (IPV6_PREFER_SRC_PUBLIC
|IPV6_PREFER_SRC_TMP
) ?
1222 !!(dst
->prefs
& IPV6_PREFER_SRC_TMP
) :
1223 score
->ifa
->idev
->cnf
.use_tempaddr
>= 2;
1224 ret
= (!(score
->ifa
->flags
& IFA_F_TEMPORARY
)) ^ preftmp
;
1228 case IPV6_SADDR_RULE_ORCHID
:
1229 /* Rule 8-: Prefer ORCHID vs ORCHID or
1230 * non-ORCHID vs non-ORCHID
1232 ret
= !(ipv6_addr_orchid(&score
->ifa
->addr
) ^
1233 ipv6_addr_orchid(dst
->addr
));
1235 case IPV6_SADDR_RULE_PREFIX
:
1236 /* Rule 8: Use longest matching prefix */
1237 ret
= ipv6_addr_diff(&score
->ifa
->addr
, dst
->addr
);
1238 if (ret
> score
->ifa
->prefix_len
)
1239 ret
= score
->ifa
->prefix_len
;
1240 score
->matchlen
= ret
;
1247 __set_bit(i
, score
->scorebits
);
1253 int ipv6_dev_get_saddr(struct net
*net
, const struct net_device
*dst_dev
,
1254 const struct in6_addr
*daddr
, unsigned int prefs
,
1255 struct in6_addr
*saddr
)
1257 struct ipv6_saddr_score scores
[2],
1258 *score
= &scores
[0], *hiscore
= &scores
[1];
1259 struct ipv6_saddr_dst dst
;
1260 struct net_device
*dev
;
1263 dst_type
= __ipv6_addr_type(daddr
);
1265 dst
.ifindex
= dst_dev
? dst_dev
->ifindex
: 0;
1266 dst
.scope
= __ipv6_addr_src_scope(dst_type
);
1267 dst
.label
= ipv6_addr_label(net
, daddr
, dst_type
, dst
.ifindex
);
1271 hiscore
->ifa
= NULL
;
1275 for_each_netdev_rcu(net
, dev
) {
1276 struct inet6_dev
*idev
;
1278 /* Candidate Source Address (section 4)
1279 * - multicast and link-local destination address,
1280 * the set of candidate source address MUST only
1281 * include addresses assigned to interfaces
1282 * belonging to the same link as the outgoing
1284 * (- For site-local destination addresses, the
1285 * set of candidate source addresses MUST only
1286 * include addresses assigned to interfaces
1287 * belonging to the same site as the outgoing
1290 if (((dst_type
& IPV6_ADDR_MULTICAST
) ||
1291 dst
.scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
) &&
1292 dst
.ifindex
&& dev
->ifindex
!= dst
.ifindex
)
1295 idev
= __in6_dev_get(dev
);
1299 read_lock_bh(&idev
->lock
);
1300 list_for_each_entry(score
->ifa
, &idev
->addr_list
, if_list
) {
1304 * - Tentative Address (RFC2462 section 5.4)
1305 * - A tentative address is not considered
1306 * "assigned to an interface" in the traditional
1307 * sense, unless it is also flagged as optimistic.
1308 * - Candidate Source Address (section 4)
1309 * - In any case, anycast addresses, multicast
1310 * addresses, and the unspecified address MUST
1311 * NOT be included in a candidate set.
1313 if ((score
->ifa
->flags
& IFA_F_TENTATIVE
) &&
1314 (!(score
->ifa
->flags
& IFA_F_OPTIMISTIC
)))
1317 score
->addr_type
= __ipv6_addr_type(&score
->ifa
->addr
);
1319 if (unlikely(score
->addr_type
== IPV6_ADDR_ANY
||
1320 score
->addr_type
& IPV6_ADDR_MULTICAST
)) {
1321 LIMIT_NETDEBUG(KERN_DEBUG
1322 "ADDRCONF: unspecified / multicast address "
1323 "assigned as unicast address on %s",
1329 bitmap_zero(score
->scorebits
, IPV6_SADDR_RULE_MAX
);
1331 for (i
= 0; i
< IPV6_SADDR_RULE_MAX
; i
++) {
1332 int minihiscore
, miniscore
;
1334 minihiscore
= ipv6_get_saddr_eval(net
, hiscore
, &dst
, i
);
1335 miniscore
= ipv6_get_saddr_eval(net
, score
, &dst
, i
);
1337 if (minihiscore
> miniscore
) {
1338 if (i
== IPV6_SADDR_RULE_SCOPE
&&
1339 score
->scopedist
> 0) {
1342 * each remaining entry
1343 * has too small (not enough)
1344 * scope, because ifa entries
1345 * are sorted by their scope
1351 } else if (minihiscore
< miniscore
) {
1353 in6_ifa_put(hiscore
->ifa
);
1355 in6_ifa_hold(score
->ifa
);
1357 swap(hiscore
, score
);
1359 /* restore our iterator */
1360 score
->ifa
= hiscore
->ifa
;
1367 read_unlock_bh(&idev
->lock
);
1372 return -EADDRNOTAVAIL
;
1374 *saddr
= hiscore
->ifa
->addr
;
1375 in6_ifa_put(hiscore
->ifa
);
1378 EXPORT_SYMBOL(ipv6_dev_get_saddr
);
1380 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1381 unsigned char banned_flags
)
1383 struct inet6_dev
*idev
;
1384 int err
= -EADDRNOTAVAIL
;
1387 idev
= __in6_dev_get(dev
);
1389 struct inet6_ifaddr
*ifp
;
1391 read_lock_bh(&idev
->lock
);
1392 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
1393 if (ifp
->scope
== IFA_LINK
&&
1394 !(ifp
->flags
& banned_flags
)) {
1400 read_unlock_bh(&idev
->lock
);
1406 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1409 struct inet6_ifaddr
*ifp
;
1411 read_lock_bh(&idev
->lock
);
1412 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
)
1414 read_unlock_bh(&idev
->lock
);
1418 int ipv6_chk_addr(struct net
*net
, const struct in6_addr
*addr
,
1419 struct net_device
*dev
, int strict
)
1421 struct inet6_ifaddr
*ifp
;
1422 struct hlist_node
*node
;
1423 unsigned int hash
= inet6_addr_hash(addr
);
1426 hlist_for_each_entry_rcu(ifp
, node
, &inet6_addr_lst
[hash
], addr_lst
) {
1427 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1429 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1430 !(ifp
->flags
&IFA_F_TENTATIVE
) &&
1431 (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1432 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))) {
1433 rcu_read_unlock_bh();
1438 rcu_read_unlock_bh();
1441 EXPORT_SYMBOL(ipv6_chk_addr
);
1443 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
1444 struct net_device
*dev
)
1446 unsigned int hash
= inet6_addr_hash(addr
);
1447 struct inet6_ifaddr
*ifp
;
1448 struct hlist_node
*node
;
1450 hlist_for_each_entry(ifp
, node
, &inet6_addr_lst
[hash
], addr_lst
) {
1451 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1453 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1454 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1461 int ipv6_chk_prefix(const struct in6_addr
*addr
, struct net_device
*dev
)
1463 struct inet6_dev
*idev
;
1464 struct inet6_ifaddr
*ifa
;
1469 idev
= __in6_dev_get(dev
);
1471 read_lock_bh(&idev
->lock
);
1472 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
1473 onlink
= ipv6_prefix_equal(addr
, &ifa
->addr
,
1478 read_unlock_bh(&idev
->lock
);
1483 EXPORT_SYMBOL(ipv6_chk_prefix
);
1485 struct inet6_ifaddr
*ipv6_get_ifaddr(struct net
*net
, const struct in6_addr
*addr
,
1486 struct net_device
*dev
, int strict
)
1488 struct inet6_ifaddr
*ifp
, *result
= NULL
;
1489 unsigned int hash
= inet6_addr_hash(addr
);
1490 struct hlist_node
*node
;
1493 hlist_for_each_entry_rcu_bh(ifp
, node
, &inet6_addr_lst
[hash
], addr_lst
) {
1494 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1496 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1497 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1498 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1505 rcu_read_unlock_bh();
1510 /* Gets referenced address, destroys ifaddr */
1512 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
, int dad_failed
)
1514 if (ifp
->flags
&IFA_F_PERMANENT
) {
1515 spin_lock_bh(&ifp
->lock
);
1516 addrconf_del_timer(ifp
);
1517 ifp
->flags
|= IFA_F_TENTATIVE
;
1519 ifp
->flags
|= IFA_F_DADFAILED
;
1520 spin_unlock_bh(&ifp
->lock
);
1522 ipv6_ifa_notify(0, ifp
);
1524 #ifdef CONFIG_IPV6_PRIVACY
1525 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1526 struct inet6_ifaddr
*ifpub
;
1527 spin_lock_bh(&ifp
->lock
);
1530 in6_ifa_hold(ifpub
);
1531 spin_unlock_bh(&ifp
->lock
);
1532 ipv6_create_tempaddr(ifpub
, ifp
);
1535 spin_unlock_bh(&ifp
->lock
);
1543 static int addrconf_dad_end(struct inet6_ifaddr
*ifp
)
1547 spin_lock(&ifp
->state_lock
);
1548 if (ifp
->state
== INET6_IFADDR_STATE_DAD
) {
1549 ifp
->state
= INET6_IFADDR_STATE_POSTDAD
;
1552 spin_unlock(&ifp
->state_lock
);
1557 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1559 struct inet6_dev
*idev
= ifp
->idev
;
1561 if (addrconf_dad_end(ifp
)) {
1566 net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n",
1567 ifp
->idev
->dev
->name
, &ifp
->addr
);
1569 if (idev
->cnf
.accept_dad
> 1 && !idev
->cnf
.disable_ipv6
) {
1570 struct in6_addr addr
;
1572 addr
.s6_addr32
[0] = htonl(0xfe800000);
1573 addr
.s6_addr32
[1] = 0;
1575 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) &&
1576 ipv6_addr_equal(&ifp
->addr
, &addr
)) {
1577 /* DAD failed for link-local based on MAC address */
1578 idev
->cnf
.disable_ipv6
= 1;
1580 pr_info("%s: IPv6 being disabled!\n",
1581 ifp
->idev
->dev
->name
);
1585 addrconf_dad_stop(ifp
, 1);
1588 /* Join to solicited addr multicast group. */
1590 void addrconf_join_solict(struct net_device
*dev
, const struct in6_addr
*addr
)
1592 struct in6_addr maddr
;
1594 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1597 addrconf_addr_solict_mult(addr
, &maddr
);
1598 ipv6_dev_mc_inc(dev
, &maddr
);
1601 void addrconf_leave_solict(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
1603 struct in6_addr maddr
;
1605 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1608 addrconf_addr_solict_mult(addr
, &maddr
);
1609 __ipv6_dev_mc_dec(idev
, &maddr
);
1612 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1614 struct in6_addr addr
;
1615 if (ifp
->prefix_len
== 127) /* RFC 6164 */
1617 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1618 if (ipv6_addr_any(&addr
))
1620 ipv6_dev_ac_inc(ifp
->idev
->dev
, &addr
);
1623 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1625 struct in6_addr addr
;
1626 if (ifp
->prefix_len
== 127) /* RFC 6164 */
1628 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1629 if (ipv6_addr_any(&addr
))
1631 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1634 static int addrconf_ifid_eui48(u8
*eui
, struct net_device
*dev
)
1636 if (dev
->addr_len
!= ETH_ALEN
)
1638 memcpy(eui
, dev
->dev_addr
, 3);
1639 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1642 * The zSeries OSA network cards can be shared among various
1643 * OS instances, but the OSA cards have only one MAC address.
1644 * This leads to duplicate address conflicts in conjunction
1645 * with IPv6 if more than one instance uses the same card.
1647 * The driver for these cards can deliver a unique 16-bit
1648 * identifier for each instance sharing the same card. It is
1649 * placed instead of 0xFFFE in the interface identifier. The
1650 * "u" bit of the interface identifier is not inverted in this
1651 * case. Hence the resulting interface identifier has local
1652 * scope according to RFC2373.
1655 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1656 eui
[4] = dev
->dev_id
& 0xFF;
1665 static int addrconf_ifid_eui64(u8
*eui
, struct net_device
*dev
)
1667 if (dev
->addr_len
!= IEEE802154_ADDR_LEN
)
1669 memcpy(eui
, dev
->dev_addr
, 8);
1674 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
1676 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1677 if (dev
->addr_len
!= ARCNET_ALEN
)
1680 eui
[7] = *(u8
*)dev
->dev_addr
;
1684 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
1686 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1688 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1693 static int __ipv6_isatap_ifid(u8
*eui
, __be32 addr
)
1697 eui
[0] = (ipv4_is_zeronet(addr
) || ipv4_is_private_10(addr
) ||
1698 ipv4_is_loopback(addr
) || ipv4_is_linklocal_169(addr
) ||
1699 ipv4_is_private_172(addr
) || ipv4_is_test_192(addr
) ||
1700 ipv4_is_anycast_6to4(addr
) || ipv4_is_private_192(addr
) ||
1701 ipv4_is_test_198(addr
) || ipv4_is_multicast(addr
) ||
1702 ipv4_is_lbcast(addr
)) ? 0x00 : 0x02;
1706 memcpy(eui
+ 4, &addr
, 4);
1710 static int addrconf_ifid_sit(u8
*eui
, struct net_device
*dev
)
1712 if (dev
->priv_flags
& IFF_ISATAP
)
1713 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
1717 static int addrconf_ifid_gre(u8
*eui
, struct net_device
*dev
)
1719 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
1722 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1724 switch (dev
->type
) {
1727 return addrconf_ifid_eui48(eui
, dev
);
1729 return addrconf_ifid_arcnet(eui
, dev
);
1730 case ARPHRD_INFINIBAND
:
1731 return addrconf_ifid_infiniband(eui
, dev
);
1733 return addrconf_ifid_sit(eui
, dev
);
1735 return addrconf_ifid_gre(eui
, dev
);
1736 case ARPHRD_IEEE802154
:
1737 return addrconf_ifid_eui64(eui
, dev
);
1742 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1745 struct inet6_ifaddr
*ifp
;
1747 read_lock_bh(&idev
->lock
);
1748 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
1749 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1750 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1755 read_unlock_bh(&idev
->lock
);
1759 #ifdef CONFIG_IPV6_PRIVACY
1760 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1761 static void __ipv6_regen_rndid(struct inet6_dev
*idev
)
1764 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
1765 idev
->rndid
[0] &= ~0x02;
1768 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1769 * check if generated address is not inappropriate
1771 * - Reserved subnet anycast (RFC 2526)
1772 * 11111101 11....11 1xxxxxxx
1773 * - ISATAP (RFC4214) 6.1
1774 * 00-00-5E-FE-xx-xx-xx-xx
1776 * - XXX: already assigned to an address on the device
1778 if (idev
->rndid
[0] == 0xfd &&
1779 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1780 (idev
->rndid
[7]&0x80))
1782 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1783 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1785 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1790 static void ipv6_regen_rndid(unsigned long data
)
1792 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1793 unsigned long expires
;
1796 write_lock_bh(&idev
->lock
);
1801 __ipv6_regen_rndid(idev
);
1804 idev
->cnf
.temp_prefered_lft
* HZ
-
1805 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
-
1806 idev
->cnf
.max_desync_factor
* HZ
;
1807 if (time_before(expires
, jiffies
)) {
1808 pr_warn("%s: too short regeneration interval; timer disabled for %s\n",
1809 __func__
, idev
->dev
->name
);
1813 if (!mod_timer(&idev
->regen_timer
, expires
))
1817 write_unlock_bh(&idev
->lock
);
1818 rcu_read_unlock_bh();
1822 static void __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
)
1824 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1825 __ipv6_regen_rndid(idev
);
1834 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1835 unsigned long expires
, u32 flags
)
1837 struct fib6_config cfg
= {
1838 .fc_table
= RT6_TABLE_PREFIX
,
1839 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1840 .fc_ifindex
= dev
->ifindex
,
1841 .fc_expires
= expires
,
1843 .fc_flags
= RTF_UP
| flags
,
1844 .fc_nlinfo
.nl_net
= dev_net(dev
),
1845 .fc_protocol
= RTPROT_KERNEL
,
1850 /* Prevent useless cloning on PtP SIT.
1851 This thing is done here expecting that the whole
1852 class of non-broadcast devices need not cloning.
1854 #if IS_ENABLED(CONFIG_IPV6_SIT)
1855 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
1856 cfg
.fc_flags
|= RTF_NONEXTHOP
;
1859 ip6_route_add(&cfg
);
1863 static struct rt6_info
*addrconf_get_prefix_route(const struct in6_addr
*pfx
,
1865 const struct net_device
*dev
,
1866 u32 flags
, u32 noflags
)
1868 struct fib6_node
*fn
;
1869 struct rt6_info
*rt
= NULL
;
1870 struct fib6_table
*table
;
1872 table
= fib6_get_table(dev_net(dev
), RT6_TABLE_PREFIX
);
1876 read_lock_bh(&table
->tb6_lock
);
1877 fn
= fib6_locate(&table
->tb6_root
, pfx
, plen
, NULL
, 0);
1880 for (rt
= fn
->leaf
; rt
; rt
= rt
->dst
.rt6_next
) {
1881 if (rt
->dst
.dev
->ifindex
!= dev
->ifindex
)
1883 if ((rt
->rt6i_flags
& flags
) != flags
)
1885 if ((rt
->rt6i_flags
& noflags
) != 0)
1891 read_unlock_bh(&table
->tb6_lock
);
1896 /* Create "default" multicast route to the interface */
1898 static void addrconf_add_mroute(struct net_device
*dev
)
1900 struct fib6_config cfg
= {
1901 .fc_table
= RT6_TABLE_LOCAL
,
1902 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1903 .fc_ifindex
= dev
->ifindex
,
1906 .fc_nlinfo
.nl_net
= dev_net(dev
),
1909 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
1911 ip6_route_add(&cfg
);
1914 #if IS_ENABLED(CONFIG_IPV6_SIT)
1915 static void sit_route_add(struct net_device
*dev
)
1917 struct fib6_config cfg
= {
1918 .fc_table
= RT6_TABLE_MAIN
,
1919 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1920 .fc_ifindex
= dev
->ifindex
,
1922 .fc_flags
= RTF_UP
| RTF_NONEXTHOP
,
1923 .fc_nlinfo
.nl_net
= dev_net(dev
),
1926 /* prefix length - 96 bits "::d.d.d.d" */
1927 ip6_route_add(&cfg
);
1931 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
1933 struct inet6_dev
*idev
;
1937 idev
= ipv6_find_idev(dev
);
1939 return ERR_PTR(-ENOBUFS
);
1941 if (idev
->cnf
.disable_ipv6
)
1942 return ERR_PTR(-EACCES
);
1944 /* Add default multicast route */
1945 if (!(dev
->flags
& IFF_LOOPBACK
))
1946 addrconf_add_mroute(dev
);
1951 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
, bool sllao
)
1953 struct prefix_info
*pinfo
;
1957 struct inet6_dev
*in6_dev
;
1958 struct net
*net
= dev_net(dev
);
1960 pinfo
= (struct prefix_info
*) opt
;
1962 if (len
< sizeof(struct prefix_info
)) {
1963 ADBG(("addrconf: prefix option too short\n"));
1968 * Validation checks ([ADDRCONF], page 19)
1971 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
1973 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
1976 valid_lft
= ntohl(pinfo
->valid
);
1977 prefered_lft
= ntohl(pinfo
->prefered
);
1979 if (prefered_lft
> valid_lft
) {
1980 net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n");
1984 in6_dev
= in6_dev_get(dev
);
1986 if (in6_dev
== NULL
) {
1987 net_dbg_ratelimited("addrconf: device %s not configured\n",
1993 * Two things going on here:
1994 * 1) Add routes for on-link prefixes
1995 * 2) Configure prefixes with the auto flag set
1998 if (pinfo
->onlink
) {
1999 struct rt6_info
*rt
;
2000 unsigned long rt_expires
;
2002 /* Avoid arithmetic overflow. Really, we could
2003 * save rt_expires in seconds, likely valid_lft,
2004 * but it would require division in fib gc, that it
2008 rt_expires
= addrconf_timeout_fixup(valid_lft
, HZ
);
2010 rt_expires
= addrconf_timeout_fixup(valid_lft
, USER_HZ
);
2012 if (addrconf_finite_timeout(rt_expires
))
2015 rt
= addrconf_get_prefix_route(&pinfo
->prefix
,
2018 RTF_ADDRCONF
| RTF_PREFIX_RT
,
2019 RTF_GATEWAY
| RTF_DEFAULT
);
2022 /* Autoconf prefix route */
2023 if (valid_lft
== 0) {
2026 } else if (addrconf_finite_timeout(rt_expires
)) {
2028 rt6_set_expires(rt
, jiffies
+ rt_expires
);
2030 rt6_clean_expires(rt
);
2032 } else if (valid_lft
) {
2033 clock_t expires
= 0;
2034 int flags
= RTF_ADDRCONF
| RTF_PREFIX_RT
;
2035 if (addrconf_finite_timeout(rt_expires
)) {
2037 flags
|= RTF_EXPIRES
;
2038 expires
= jiffies_to_clock_t(rt_expires
);
2040 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
2041 dev
, expires
, flags
);
2046 /* Try to figure out our local address for this prefix */
2048 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
2049 struct inet6_ifaddr
*ifp
;
2050 struct in6_addr addr
;
2051 int create
= 0, update_lft
= 0;
2053 if (pinfo
->prefix_len
== 64) {
2054 memcpy(&addr
, &pinfo
->prefix
, 8);
2055 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
2056 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
2057 in6_dev_put(in6_dev
);
2062 net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n",
2064 in6_dev_put(in6_dev
);
2069 ifp
= ipv6_get_ifaddr(net
, &addr
, dev
, 1);
2071 if (ifp
== NULL
&& valid_lft
) {
2072 int max_addresses
= in6_dev
->cnf
.max_addresses
;
2075 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2076 if (in6_dev
->cnf
.optimistic_dad
&&
2077 !net
->ipv6
.devconf_all
->forwarding
&& sllao
)
2078 addr_flags
= IFA_F_OPTIMISTIC
;
2081 /* Do not allow to create too much of autoconfigured
2082 * addresses; this would be too easy way to crash kernel.
2084 if (!max_addresses
||
2085 ipv6_count_addresses(in6_dev
) < max_addresses
)
2086 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
2087 addr_type
&IPV6_ADDR_SCOPE_MASK
,
2090 if (IS_ERR_OR_NULL(ifp
)) {
2091 in6_dev_put(in6_dev
);
2095 update_lft
= create
= 1;
2096 ifp
->cstamp
= jiffies
;
2097 addrconf_dad_start(ifp
);
2103 #ifdef CONFIG_IPV6_PRIVACY
2104 struct inet6_ifaddr
*ift
;
2108 /* update lifetime (RFC2462 5.5.3 e) */
2109 spin_lock(&ifp
->lock
);
2111 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
2112 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
2115 if (!update_lft
&& stored_lft
) {
2116 if (valid_lft
> MIN_VALID_LIFETIME
||
2117 valid_lft
> stored_lft
)
2119 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
2120 /* valid_lft <= stored_lft is always true */
2122 * RFC 4862 Section 5.5.3e:
2123 * "Note that the preferred lifetime of
2124 * the corresponding address is always
2125 * reset to the Preferred Lifetime in
2126 * the received Prefix Information
2127 * option, regardless of whether the
2128 * valid lifetime is also reset or
2131 * So if the preferred lifetime in
2132 * this advertisement is different
2133 * than what we have stored, but the
2134 * valid lifetime is invalid, just
2135 * reset prefered_lft.
2137 * We must set the valid lifetime
2138 * to the stored lifetime since we'll
2139 * be updating the timestamp below,
2140 * else we'll set it back to the
2143 if (prefered_lft
!= ifp
->prefered_lft
) {
2144 valid_lft
= stored_lft
;
2148 valid_lft
= MIN_VALID_LIFETIME
;
2149 if (valid_lft
< prefered_lft
)
2150 prefered_lft
= valid_lft
;
2156 ifp
->valid_lft
= valid_lft
;
2157 ifp
->prefered_lft
= prefered_lft
;
2160 ifp
->flags
&= ~IFA_F_DEPRECATED
;
2161 spin_unlock(&ifp
->lock
);
2163 if (!(flags
&IFA_F_TENTATIVE
))
2164 ipv6_ifa_notify(0, ifp
);
2166 spin_unlock(&ifp
->lock
);
2168 #ifdef CONFIG_IPV6_PRIVACY
2169 read_lock_bh(&in6_dev
->lock
);
2170 /* update all temporary addresses in the list */
2171 list_for_each_entry(ift
, &in6_dev
->tempaddr_list
,
2173 int age
, max_valid
, max_prefered
;
2175 if (ifp
!= ift
->ifpub
)
2179 * RFC 4941 section 3.3:
2180 * If a received option will extend the lifetime
2181 * of a public address, the lifetimes of
2182 * temporary addresses should be extended,
2183 * subject to the overall constraint that no
2184 * temporary addresses should ever remain
2185 * "valid" or "preferred" for a time longer than
2186 * (TEMP_VALID_LIFETIME) or
2187 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR),
2190 age
= (now
- ift
->cstamp
) / HZ
;
2191 max_valid
= in6_dev
->cnf
.temp_valid_lft
- age
;
2195 max_prefered
= in6_dev
->cnf
.temp_prefered_lft
-
2196 in6_dev
->cnf
.max_desync_factor
-
2198 if (max_prefered
< 0)
2201 if (valid_lft
> max_valid
)
2202 valid_lft
= max_valid
;
2204 if (prefered_lft
> max_prefered
)
2205 prefered_lft
= max_prefered
;
2207 spin_lock(&ift
->lock
);
2209 ift
->valid_lft
= valid_lft
;
2210 ift
->prefered_lft
= prefered_lft
;
2212 if (prefered_lft
> 0)
2213 ift
->flags
&= ~IFA_F_DEPRECATED
;
2215 spin_unlock(&ift
->lock
);
2216 if (!(flags
&IFA_F_TENTATIVE
))
2217 ipv6_ifa_notify(0, ift
);
2220 if ((create
|| list_empty(&in6_dev
->tempaddr_list
)) && in6_dev
->cnf
.use_tempaddr
> 0) {
2222 * When a new public address is created as
2223 * described in [ADDRCONF], also create a new
2224 * temporary address. Also create a temporary
2225 * address if it's enabled but no temporary
2226 * address currently exists.
2228 read_unlock_bh(&in6_dev
->lock
);
2229 ipv6_create_tempaddr(ifp
, NULL
);
2231 read_unlock_bh(&in6_dev
->lock
);
2238 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
2239 in6_dev_put(in6_dev
);
2243 * Set destination address.
2244 * Special case for SIT interfaces where we create a new "virtual"
2247 int addrconf_set_dstaddr(struct net
*net
, void __user
*arg
)
2249 struct in6_ifreq ireq
;
2250 struct net_device
*dev
;
2256 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2259 dev
= __dev_get_by_index(net
, ireq
.ifr6_ifindex
);
2265 #if IS_ENABLED(CONFIG_IPV6_SIT)
2266 if (dev
->type
== ARPHRD_SIT
) {
2267 const struct net_device_ops
*ops
= dev
->netdev_ops
;
2269 struct ip_tunnel_parm p
;
2271 err
= -EADDRNOTAVAIL
;
2272 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
2275 memset(&p
, 0, sizeof(p
));
2276 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
2280 p
.iph
.protocol
= IPPROTO_IPV6
;
2282 ifr
.ifr_ifru
.ifru_data
= (__force
void __user
*)&p
;
2284 if (ops
->ndo_do_ioctl
) {
2285 mm_segment_t oldfs
= get_fs();
2288 err
= ops
->ndo_do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
2295 dev
= __dev_get_by_name(net
, p
.name
);
2298 err
= dev_open(dev
);
2309 * Manual configuration of address on an interface
2311 static int inet6_addr_add(struct net
*net
, int ifindex
, const struct in6_addr
*pfx
,
2312 unsigned int plen
, __u8 ifa_flags
, __u32 prefered_lft
,
2315 struct inet6_ifaddr
*ifp
;
2316 struct inet6_dev
*idev
;
2317 struct net_device
*dev
;
2321 unsigned long timeout
;
2328 /* check the lifetime */
2329 if (!valid_lft
|| prefered_lft
> valid_lft
)
2332 dev
= __dev_get_by_index(net
, ifindex
);
2336 idev
= addrconf_add_dev(dev
);
2338 return PTR_ERR(idev
);
2340 scope
= ipv6_addr_scope(pfx
);
2342 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
2343 if (addrconf_finite_timeout(timeout
)) {
2344 expires
= jiffies_to_clock_t(timeout
* HZ
);
2345 valid_lft
= timeout
;
2346 flags
= RTF_EXPIRES
;
2350 ifa_flags
|= IFA_F_PERMANENT
;
2353 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
2354 if (addrconf_finite_timeout(timeout
)) {
2356 ifa_flags
|= IFA_F_DEPRECATED
;
2357 prefered_lft
= timeout
;
2360 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, ifa_flags
);
2363 spin_lock_bh(&ifp
->lock
);
2364 ifp
->valid_lft
= valid_lft
;
2365 ifp
->prefered_lft
= prefered_lft
;
2366 ifp
->tstamp
= jiffies
;
2367 spin_unlock_bh(&ifp
->lock
);
2369 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
2372 * Note that section 3.1 of RFC 4429 indicates
2373 * that the Optimistic flag should not be set for
2374 * manually configured addresses
2376 addrconf_dad_start(ifp
);
2382 return PTR_ERR(ifp
);
2385 static int inet6_addr_del(struct net
*net
, int ifindex
, const struct in6_addr
*pfx
,
2388 struct inet6_ifaddr
*ifp
;
2389 struct inet6_dev
*idev
;
2390 struct net_device
*dev
;
2395 dev
= __dev_get_by_index(net
, ifindex
);
2399 if ((idev
= __in6_dev_get(dev
)) == NULL
)
2402 read_lock_bh(&idev
->lock
);
2403 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
2404 if (ifp
->prefix_len
== plen
&&
2405 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
2407 read_unlock_bh(&idev
->lock
);
2411 /* If the last address is deleted administratively,
2412 disable IPv6 on this interface.
2414 if (list_empty(&idev
->addr_list
))
2415 addrconf_ifdown(idev
->dev
, 1);
2419 read_unlock_bh(&idev
->lock
);
2420 return -EADDRNOTAVAIL
;
2424 int addrconf_add_ifaddr(struct net
*net
, void __user
*arg
)
2426 struct in6_ifreq ireq
;
2429 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
2432 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2436 err
= inet6_addr_add(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2437 ireq
.ifr6_prefixlen
, IFA_F_PERMANENT
,
2438 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2443 int addrconf_del_ifaddr(struct net
*net
, void __user
*arg
)
2445 struct in6_ifreq ireq
;
2448 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
2451 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2455 err
= inet6_addr_del(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2456 ireq
.ifr6_prefixlen
);
2461 static void add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
2462 int plen
, int scope
)
2464 struct inet6_ifaddr
*ifp
;
2466 ifp
= ipv6_add_addr(idev
, addr
, plen
, scope
, IFA_F_PERMANENT
);
2468 spin_lock_bh(&ifp
->lock
);
2469 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2470 spin_unlock_bh(&ifp
->lock
);
2471 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2476 #if IS_ENABLED(CONFIG_IPV6_SIT)
2477 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
2479 struct in6_addr addr
;
2480 struct net_device
*dev
;
2481 struct net
*net
= dev_net(idev
->dev
);
2486 memset(&addr
, 0, sizeof(struct in6_addr
));
2487 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
2489 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
2490 addr
.s6_addr32
[0] = htonl(0xfe800000);
2493 scope
= IPV6_ADDR_COMPATv4
;
2496 if (addr
.s6_addr32
[3]) {
2497 add_addr(idev
, &addr
, 128, scope
);
2501 for_each_netdev(net
, dev
) {
2502 struct in_device
*in_dev
= __in_dev_get_rtnl(dev
);
2503 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
2504 struct in_ifaddr
*ifa
;
2508 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
2511 addr
.s6_addr32
[3] = ifa
->ifa_local
;
2513 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
2515 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
2516 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2520 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2525 add_addr(idev
, &addr
, plen
, flag
);
2532 static void init_loopback(struct net_device
*dev
)
2534 struct inet6_dev
*idev
;
2540 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2541 pr_debug("%s: add_dev failed\n", __func__
);
2545 add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
);
2548 static void addrconf_add_linklocal(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
2550 struct inet6_ifaddr
*ifp
;
2551 u32 addr_flags
= IFA_F_PERMANENT
;
2553 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2554 if (idev
->cnf
.optimistic_dad
&&
2555 !dev_net(idev
->dev
)->ipv6
.devconf_all
->forwarding
)
2556 addr_flags
|= IFA_F_OPTIMISTIC
;
2560 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, addr_flags
);
2562 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
2563 addrconf_dad_start(ifp
);
2568 static void addrconf_dev_config(struct net_device
*dev
)
2570 struct in6_addr addr
;
2571 struct inet6_dev
*idev
;
2575 if ((dev
->type
!= ARPHRD_ETHER
) &&
2576 (dev
->type
!= ARPHRD_FDDI
) &&
2577 (dev
->type
!= ARPHRD_ARCNET
) &&
2578 (dev
->type
!= ARPHRD_INFINIBAND
) &&
2579 (dev
->type
!= ARPHRD_IEEE802154
)) {
2580 /* Alas, we support only Ethernet autoconfiguration. */
2584 idev
= addrconf_add_dev(dev
);
2588 memset(&addr
, 0, sizeof(struct in6_addr
));
2589 addr
.s6_addr32
[0] = htonl(0xFE800000);
2591 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
2592 addrconf_add_linklocal(idev
, &addr
);
2595 #if IS_ENABLED(CONFIG_IPV6_SIT)
2596 static void addrconf_sit_config(struct net_device
*dev
)
2598 struct inet6_dev
*idev
;
2603 * Configure the tunnel with one of our IPv4
2604 * addresses... we should configure all of
2605 * our v4 addrs in the tunnel
2608 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2609 pr_debug("%s: add_dev failed\n", __func__
);
2613 if (dev
->priv_flags
& IFF_ISATAP
) {
2614 struct in6_addr addr
;
2616 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2617 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
2618 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
))
2619 addrconf_add_linklocal(idev
, &addr
);
2623 sit_add_v4_addrs(idev
);
2625 if (dev
->flags
&IFF_POINTOPOINT
)
2626 addrconf_add_mroute(dev
);
2632 #if IS_ENABLED(CONFIG_NET_IPGRE)
2633 static void addrconf_gre_config(struct net_device
*dev
)
2635 struct inet6_dev
*idev
;
2636 struct in6_addr addr
;
2638 pr_info("%s(%s)\n", __func__
, dev
->name
);
2642 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2643 pr_debug("%s: add_dev failed\n", __func__
);
2647 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2648 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
2650 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
))
2651 addrconf_add_linklocal(idev
, &addr
);
2656 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
2658 struct in6_addr lladdr
;
2660 if (!ipv6_get_lladdr(link_dev
, &lladdr
, IFA_F_TENTATIVE
)) {
2661 addrconf_add_linklocal(idev
, &lladdr
);
2667 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
2669 struct net_device
*link_dev
;
2670 struct net
*net
= dev_net(idev
->dev
);
2672 /* first try to inherit the link-local address from the link device */
2673 if (idev
->dev
->iflink
&&
2674 (link_dev
= __dev_get_by_index(net
, idev
->dev
->iflink
))) {
2675 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2678 /* then try to inherit it from any device */
2679 for_each_netdev(net
, link_dev
) {
2680 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2683 pr_debug("init ip6-ip6: add_linklocal failed\n");
2687 * Autoconfigure tunnel with a link-local address so routing protocols,
2688 * DHCPv6, MLD etc. can be run over the virtual link
2691 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
2693 struct inet6_dev
*idev
;
2697 idev
= addrconf_add_dev(dev
);
2699 pr_debug("init ip6-ip6: add_dev failed\n");
2702 ip6_tnl_add_linklocal(idev
);
2705 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
2708 struct net_device
*dev
= (struct net_device
*) data
;
2709 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2710 int run_pending
= 0;
2714 case NETDEV_REGISTER
:
2715 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2716 idev
= ipv6_add_dev(dev
);
2718 return notifier_from_errno(-ENOMEM
);
2724 if (dev
->flags
& IFF_SLAVE
)
2727 if (event
== NETDEV_UP
) {
2728 if (!addrconf_qdisc_ok(dev
)) {
2729 /* device is not ready yet. */
2730 pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n",
2735 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
)
2736 idev
= ipv6_add_dev(dev
);
2739 idev
->if_flags
|= IF_READY
;
2743 if (!addrconf_qdisc_ok(dev
)) {
2744 /* device is still not ready. */
2749 if (idev
->if_flags
& IF_READY
)
2750 /* device is already configured. */
2752 idev
->if_flags
|= IF_READY
;
2755 pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n",
2761 switch (dev
->type
) {
2762 #if IS_ENABLED(CONFIG_IPV6_SIT)
2764 addrconf_sit_config(dev
);
2767 #if IS_ENABLED(CONFIG_NET_IPGRE)
2769 addrconf_gre_config(dev
);
2772 case ARPHRD_TUNNEL6
:
2773 addrconf_ip6_tnl_config(dev
);
2775 case ARPHRD_LOOPBACK
:
2780 addrconf_dev_config(dev
);
2786 addrconf_dad_run(idev
);
2789 * If the MTU changed during the interface down,
2790 * when the interface up, the changed MTU must be
2791 * reflected in the idev as well as routers.
2793 if (idev
->cnf
.mtu6
!= dev
->mtu
&&
2794 dev
->mtu
>= IPV6_MIN_MTU
) {
2795 rt6_mtu_change(dev
, dev
->mtu
);
2796 idev
->cnf
.mtu6
= dev
->mtu
;
2798 idev
->tstamp
= jiffies
;
2799 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2802 * If the changed mtu during down is lower than
2803 * IPV6_MIN_MTU stop IPv6 on this interface.
2805 if (dev
->mtu
< IPV6_MIN_MTU
)
2806 addrconf_ifdown(dev
, 1);
2810 case NETDEV_CHANGEMTU
:
2811 if (idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2812 rt6_mtu_change(dev
, dev
->mtu
);
2813 idev
->cnf
.mtu6
= dev
->mtu
;
2817 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2818 idev
= ipv6_add_dev(dev
);
2824 * MTU falled under IPV6_MIN_MTU.
2825 * Stop IPv6 on this interface.
2829 case NETDEV_UNREGISTER
:
2831 * Remove all addresses from this interface.
2833 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2836 case NETDEV_CHANGENAME
:
2838 snmp6_unregister_dev(idev
);
2839 addrconf_sysctl_unregister(idev
);
2840 addrconf_sysctl_register(idev
);
2841 err
= snmp6_register_dev(idev
);
2843 return notifier_from_errno(err
);
2847 case NETDEV_PRE_TYPE_CHANGE
:
2848 case NETDEV_POST_TYPE_CHANGE
:
2849 addrconf_type_change(dev
, event
);
2857 * addrconf module should be notified of a device going up
2859 static struct notifier_block ipv6_dev_notf
= {
2860 .notifier_call
= addrconf_notify
,
2863 static void addrconf_type_change(struct net_device
*dev
, unsigned long event
)
2865 struct inet6_dev
*idev
;
2868 idev
= __in6_dev_get(dev
);
2870 if (event
== NETDEV_POST_TYPE_CHANGE
)
2871 ipv6_mc_remap(idev
);
2872 else if (event
== NETDEV_PRE_TYPE_CHANGE
)
2873 ipv6_mc_unmap(idev
);
2876 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2878 struct net
*net
= dev_net(dev
);
2879 struct inet6_dev
*idev
;
2880 struct inet6_ifaddr
*ifa
;
2885 rt6_ifdown(net
, dev
);
2886 neigh_ifdown(&nd_tbl
, dev
);
2888 idev
= __in6_dev_get(dev
);
2893 * Step 1: remove reference to ipv6 device from parent device.
2899 /* protected by rtnl_lock */
2900 RCU_INIT_POINTER(dev
->ip6_ptr
, NULL
);
2902 /* Step 1.5: remove snmp6 entry */
2903 snmp6_unregister_dev(idev
);
2907 /* Step 2: clear hash table */
2908 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
2909 struct hlist_head
*h
= &inet6_addr_lst
[i
];
2910 struct hlist_node
*n
;
2912 spin_lock_bh(&addrconf_hash_lock
);
2914 hlist_for_each_entry_rcu(ifa
, n
, h
, addr_lst
) {
2915 if (ifa
->idev
== idev
) {
2916 hlist_del_init_rcu(&ifa
->addr_lst
);
2917 addrconf_del_timer(ifa
);
2921 spin_unlock_bh(&addrconf_hash_lock
);
2924 write_lock_bh(&idev
->lock
);
2926 /* Step 2: clear flags for stateless addrconf */
2928 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
2930 #ifdef CONFIG_IPV6_PRIVACY
2931 if (how
&& del_timer(&idev
->regen_timer
))
2934 /* Step 3: clear tempaddr list */
2935 while (!list_empty(&idev
->tempaddr_list
)) {
2936 ifa
= list_first_entry(&idev
->tempaddr_list
,
2937 struct inet6_ifaddr
, tmp_list
);
2938 list_del(&ifa
->tmp_list
);
2939 write_unlock_bh(&idev
->lock
);
2940 spin_lock_bh(&ifa
->lock
);
2943 in6_ifa_put(ifa
->ifpub
);
2946 spin_unlock_bh(&ifa
->lock
);
2948 write_lock_bh(&idev
->lock
);
2952 while (!list_empty(&idev
->addr_list
)) {
2953 ifa
= list_first_entry(&idev
->addr_list
,
2954 struct inet6_ifaddr
, if_list
);
2955 addrconf_del_timer(ifa
);
2957 list_del(&ifa
->if_list
);
2959 write_unlock_bh(&idev
->lock
);
2961 spin_lock_bh(&ifa
->state_lock
);
2963 ifa
->state
= INET6_IFADDR_STATE_DEAD
;
2964 spin_unlock_bh(&ifa
->state_lock
);
2966 if (state
!= INET6_IFADDR_STATE_DEAD
) {
2967 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
2968 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifa
);
2972 write_lock_bh(&idev
->lock
);
2975 write_unlock_bh(&idev
->lock
);
2977 /* Step 5: Discard multicast list */
2979 ipv6_mc_destroy_dev(idev
);
2983 idev
->tstamp
= jiffies
;
2985 /* Last: Shot the device (if unregistered) */
2987 addrconf_sysctl_unregister(idev
);
2988 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
2989 neigh_ifdown(&nd_tbl
, dev
);
2995 static void addrconf_rs_timer(unsigned long data
)
2997 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
2998 struct inet6_dev
*idev
= ifp
->idev
;
3000 read_lock(&idev
->lock
);
3001 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
))
3004 if (!ipv6_accept_ra(idev
))
3007 /* Announcement received after solicitation was sent */
3008 if (idev
->if_flags
& IF_RA_RCVD
)
3011 spin_lock(&ifp
->lock
);
3012 if (ifp
->probes
++ < idev
->cnf
.rtr_solicits
) {
3013 /* The wait after the last probe can be shorter */
3014 addrconf_mod_timer(ifp
, AC_RS
,
3015 (ifp
->probes
== idev
->cnf
.rtr_solicits
) ?
3016 idev
->cnf
.rtr_solicit_delay
:
3017 idev
->cnf
.rtr_solicit_interval
);
3018 spin_unlock(&ifp
->lock
);
3020 ndisc_send_rs(idev
->dev
, &ifp
->addr
, &in6addr_linklocal_allrouters
);
3022 spin_unlock(&ifp
->lock
);
3024 * Note: we do not support deprecated "all on-link"
3025 * assumption any longer.
3027 pr_debug("%s: no IPv6 routers present\n", idev
->dev
->name
);
3031 read_unlock(&idev
->lock
);
3036 * Duplicate Address Detection
3038 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
3040 unsigned long rand_num
;
3041 struct inet6_dev
*idev
= ifp
->idev
;
3043 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
3046 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
3048 ifp
->probes
= idev
->cnf
.dad_transmits
;
3049 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
3052 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
)
3054 struct inet6_dev
*idev
= ifp
->idev
;
3055 struct net_device
*dev
= idev
->dev
;
3057 addrconf_join_solict(dev
, &ifp
->addr
);
3059 net_srandom(ifp
->addr
.s6_addr32
[3]);
3061 read_lock_bh(&idev
->lock
);
3062 spin_lock(&ifp
->lock
);
3063 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
)
3066 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
3067 idev
->cnf
.accept_dad
< 1 ||
3068 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
3069 ifp
->flags
& IFA_F_NODAD
) {
3070 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
3071 spin_unlock(&ifp
->lock
);
3072 read_unlock_bh(&idev
->lock
);
3074 addrconf_dad_completed(ifp
);
3078 if (!(idev
->if_flags
& IF_READY
)) {
3079 spin_unlock(&ifp
->lock
);
3080 read_unlock_bh(&idev
->lock
);
3082 * If the device is not ready:
3083 * - keep it tentative if it is a permanent address.
3084 * - otherwise, kill it.
3087 addrconf_dad_stop(ifp
, 0);
3092 * Optimistic nodes can start receiving
3095 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
3096 ip6_ins_rt(ifp
->rt
);
3098 addrconf_dad_kick(ifp
);
3100 spin_unlock(&ifp
->lock
);
3101 read_unlock_bh(&idev
->lock
);
3104 static void addrconf_dad_timer(unsigned long data
)
3106 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
3107 struct inet6_dev
*idev
= ifp
->idev
;
3108 struct in6_addr mcaddr
;
3110 if (!ifp
->probes
&& addrconf_dad_end(ifp
))
3113 read_lock(&idev
->lock
);
3114 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
)) {
3115 read_unlock(&idev
->lock
);
3119 spin_lock(&ifp
->lock
);
3120 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
) {
3121 spin_unlock(&ifp
->lock
);
3122 read_unlock(&idev
->lock
);
3126 if (ifp
->probes
== 0) {
3128 * DAD was successful
3131 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
3132 spin_unlock(&ifp
->lock
);
3133 read_unlock(&idev
->lock
);
3135 addrconf_dad_completed(ifp
);
3141 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
3142 spin_unlock(&ifp
->lock
);
3143 read_unlock(&idev
->lock
);
3145 /* send a neighbour solicitation for our addr */
3146 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
3147 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &in6addr_any
);
3152 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
3154 struct net_device
*dev
= ifp
->idev
->dev
;
3157 * Configure the address for reception. Now it is valid.
3160 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
3162 /* If added prefix is link local and we are prepared to process
3163 router advertisements, start sending router solicitations.
3166 if (ipv6_accept_ra(ifp
->idev
) &&
3167 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
3168 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
3169 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
3171 * If a host as already performed a random delay
3172 * [...] as part of DAD [...] there is no need
3173 * to delay again before sending the first RS
3175 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &in6addr_linklocal_allrouters
);
3177 spin_lock_bh(&ifp
->lock
);
3179 ifp
->idev
->if_flags
|= IF_RS_SENT
;
3180 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
3181 spin_unlock_bh(&ifp
->lock
);
3185 static void addrconf_dad_run(struct inet6_dev
*idev
)
3187 struct inet6_ifaddr
*ifp
;
3189 read_lock_bh(&idev
->lock
);
3190 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
3191 spin_lock(&ifp
->lock
);
3192 if (ifp
->flags
& IFA_F_TENTATIVE
&&
3193 ifp
->state
== INET6_IFADDR_STATE_DAD
)
3194 addrconf_dad_kick(ifp
);
3195 spin_unlock(&ifp
->lock
);
3197 read_unlock_bh(&idev
->lock
);
3200 #ifdef CONFIG_PROC_FS
3201 struct if6_iter_state
{
3202 struct seq_net_private p
;
3207 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
, loff_t pos
)
3209 struct inet6_ifaddr
*ifa
= NULL
;
3210 struct if6_iter_state
*state
= seq
->private;
3211 struct net
*net
= seq_file_net(seq
);
3214 /* initial bucket if pos is 0 */
3220 for (; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
3221 struct hlist_node
*n
;
3222 hlist_for_each_entry_rcu_bh(ifa
, n
, &inet6_addr_lst
[state
->bucket
],
3224 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
3226 /* sync with offset */
3227 if (p
< state
->offset
) {
3235 /* prepare for next bucket */
3242 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
,
3243 struct inet6_ifaddr
*ifa
)
3245 struct if6_iter_state
*state
= seq
->private;
3246 struct net
*net
= seq_file_net(seq
);
3247 struct hlist_node
*n
= &ifa
->addr_lst
;
3249 hlist_for_each_entry_continue_rcu_bh(ifa
, n
, addr_lst
) {
3250 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
3256 while (++state
->bucket
< IN6_ADDR_HSIZE
) {
3258 hlist_for_each_entry_rcu_bh(ifa
, n
,
3259 &inet6_addr_lst
[state
->bucket
], addr_lst
) {
3260 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
3270 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
3274 return if6_get_first(seq
, *pos
);
3277 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
3279 struct inet6_ifaddr
*ifa
;
3281 ifa
= if6_get_next(seq
, v
);
3286 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
3289 rcu_read_unlock_bh();
3292 static int if6_seq_show(struct seq_file
*seq
, void *v
)
3294 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
3295 seq_printf(seq
, "%pi6 %02x %02x %02x %02x %8s\n",
3297 ifp
->idev
->dev
->ifindex
,
3301 ifp
->idev
->dev
->name
);
3305 static const struct seq_operations if6_seq_ops
= {
3306 .start
= if6_seq_start
,
3307 .next
= if6_seq_next
,
3308 .show
= if6_seq_show
,
3309 .stop
= if6_seq_stop
,
3312 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
3314 return seq_open_net(inode
, file
, &if6_seq_ops
,
3315 sizeof(struct if6_iter_state
));
3318 static const struct file_operations if6_fops
= {
3319 .owner
= THIS_MODULE
,
3320 .open
= if6_seq_open
,
3322 .llseek
= seq_lseek
,
3323 .release
= seq_release_net
,
3326 static int __net_init
if6_proc_net_init(struct net
*net
)
3328 if (!proc_create("if_inet6", S_IRUGO
, net
->proc_net
, &if6_fops
))
3333 static void __net_exit
if6_proc_net_exit(struct net
*net
)
3335 remove_proc_entry("if_inet6", net
->proc_net
);
3338 static struct pernet_operations if6_proc_net_ops
= {
3339 .init
= if6_proc_net_init
,
3340 .exit
= if6_proc_net_exit
,
3343 int __init
if6_proc_init(void)
3345 return register_pernet_subsys(&if6_proc_net_ops
);
3348 void if6_proc_exit(void)
3350 unregister_pernet_subsys(&if6_proc_net_ops
);
3352 #endif /* CONFIG_PROC_FS */
3354 #if IS_ENABLED(CONFIG_IPV6_MIP6)
3355 /* Check if address is a home address configured on any interface. */
3356 int ipv6_chk_home_addr(struct net
*net
, const struct in6_addr
*addr
)
3359 struct inet6_ifaddr
*ifp
= NULL
;
3360 struct hlist_node
*n
;
3361 unsigned int hash
= inet6_addr_hash(addr
);
3364 hlist_for_each_entry_rcu_bh(ifp
, n
, &inet6_addr_lst
[hash
], addr_lst
) {
3365 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
3367 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
3368 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
3373 rcu_read_unlock_bh();
3379 * Periodic address status verification
3382 static void addrconf_verify(unsigned long foo
)
3384 unsigned long now
, next
, next_sec
, next_sched
;
3385 struct inet6_ifaddr
*ifp
;
3386 struct hlist_node
*node
;
3390 spin_lock(&addrconf_verify_lock
);
3392 next
= round_jiffies_up(now
+ ADDR_CHECK_FREQUENCY
);
3394 del_timer(&addr_chk_timer
);
3396 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
3398 hlist_for_each_entry_rcu_bh(ifp
, node
,
3399 &inet6_addr_lst
[i
], addr_lst
) {
3402 if (ifp
->flags
& IFA_F_PERMANENT
)
3405 spin_lock(&ifp
->lock
);
3406 /* We try to batch several events at once. */
3407 age
= (now
- ifp
->tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
3409 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
3410 age
>= ifp
->valid_lft
) {
3411 spin_unlock(&ifp
->lock
);
3415 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
3416 spin_unlock(&ifp
->lock
);
3418 } else if (age
>= ifp
->prefered_lft
) {
3419 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
3422 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
3424 ifp
->flags
|= IFA_F_DEPRECATED
;
3427 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
3428 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
3430 spin_unlock(&ifp
->lock
);
3435 ipv6_ifa_notify(0, ifp
);
3439 #ifdef CONFIG_IPV6_PRIVACY
3440 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
3441 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
3442 unsigned long regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
3443 ifp
->idev
->cnf
.dad_transmits
*
3444 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
3446 if (age
>= ifp
->prefered_lft
- regen_advance
) {
3447 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
3448 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3449 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3450 if (!ifp
->regen_count
&& ifpub
) {
3453 in6_ifa_hold(ifpub
);
3454 spin_unlock(&ifp
->lock
);
3456 spin_lock(&ifpub
->lock
);
3457 ifpub
->regen_count
= 0;
3458 spin_unlock(&ifpub
->lock
);
3459 ipv6_create_tempaddr(ifpub
, ifp
);
3464 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
3465 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
3466 spin_unlock(&ifp
->lock
);
3469 /* ifp->prefered_lft <= ifp->valid_lft */
3470 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3471 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3472 spin_unlock(&ifp
->lock
);
3477 next_sec
= round_jiffies_up(next
);
3480 /* If rounded timeout is accurate enough, accept it. */
3481 if (time_before(next_sec
, next
+ ADDRCONF_TIMER_FUZZ
))
3482 next_sched
= next_sec
;
3484 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
3485 if (time_before(next_sched
, jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
))
3486 next_sched
= jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
;
3488 ADBG((KERN_DEBUG
"now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
3489 now
, next
, next_sec
, next_sched
));
3491 addr_chk_timer
.expires
= next_sched
;
3492 add_timer(&addr_chk_timer
);
3493 spin_unlock(&addrconf_verify_lock
);
3494 rcu_read_unlock_bh();
3497 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
)
3499 struct in6_addr
*pfx
= NULL
;
3502 pfx
= nla_data(addr
);
3505 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
3508 pfx
= nla_data(local
);
3514 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
3515 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
3516 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
3517 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
3521 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3523 struct net
*net
= sock_net(skb
->sk
);
3524 struct ifaddrmsg
*ifm
;
3525 struct nlattr
*tb
[IFA_MAX
+1];
3526 struct in6_addr
*pfx
;
3529 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3533 ifm
= nlmsg_data(nlh
);
3534 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3538 return inet6_addr_del(net
, ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
3541 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u8 ifa_flags
,
3542 u32 prefered_lft
, u32 valid_lft
)
3546 unsigned long timeout
;
3548 if (!valid_lft
|| (prefered_lft
> valid_lft
))
3551 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
3552 if (addrconf_finite_timeout(timeout
)) {
3553 expires
= jiffies_to_clock_t(timeout
* HZ
);
3554 valid_lft
= timeout
;
3555 flags
= RTF_EXPIRES
;
3559 ifa_flags
|= IFA_F_PERMANENT
;
3562 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
3563 if (addrconf_finite_timeout(timeout
)) {
3565 ifa_flags
|= IFA_F_DEPRECATED
;
3566 prefered_lft
= timeout
;
3569 spin_lock_bh(&ifp
->lock
);
3570 ifp
->flags
= (ifp
->flags
& ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
| IFA_F_HOMEADDRESS
)) | ifa_flags
;
3571 ifp
->tstamp
= jiffies
;
3572 ifp
->valid_lft
= valid_lft
;
3573 ifp
->prefered_lft
= prefered_lft
;
3575 spin_unlock_bh(&ifp
->lock
);
3576 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
3577 ipv6_ifa_notify(0, ifp
);
3579 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
3587 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3589 struct net
*net
= sock_net(skb
->sk
);
3590 struct ifaddrmsg
*ifm
;
3591 struct nlattr
*tb
[IFA_MAX
+1];
3592 struct in6_addr
*pfx
;
3593 struct inet6_ifaddr
*ifa
;
3594 struct net_device
*dev
;
3595 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
3599 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3603 ifm
= nlmsg_data(nlh
);
3604 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3608 if (tb
[IFA_CACHEINFO
]) {
3609 struct ifa_cacheinfo
*ci
;
3611 ci
= nla_data(tb
[IFA_CACHEINFO
]);
3612 valid_lft
= ci
->ifa_valid
;
3613 preferred_lft
= ci
->ifa_prefered
;
3615 preferred_lft
= INFINITY_LIFE_TIME
;
3616 valid_lft
= INFINITY_LIFE_TIME
;
3619 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3623 /* We ignore other flags so far. */
3624 ifa_flags
= ifm
->ifa_flags
& (IFA_F_NODAD
| IFA_F_HOMEADDRESS
);
3626 ifa
= ipv6_get_ifaddr(net
, pfx
, dev
, 1);
3629 * It would be best to check for !NLM_F_CREATE here but
3630 * userspace alreay relies on not having to provide this.
3632 return inet6_addr_add(net
, ifm
->ifa_index
, pfx
,
3633 ifm
->ifa_prefixlen
, ifa_flags
,
3634 preferred_lft
, valid_lft
);
3637 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
3638 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
3641 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
3648 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u8 flags
,
3649 u8 scope
, int ifindex
)
3651 struct ifaddrmsg
*ifm
;
3653 ifm
= nlmsg_data(nlh
);
3654 ifm
->ifa_family
= AF_INET6
;
3655 ifm
->ifa_prefixlen
= prefixlen
;
3656 ifm
->ifa_flags
= flags
;
3657 ifm
->ifa_scope
= scope
;
3658 ifm
->ifa_index
= ifindex
;
3661 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
3662 unsigned long tstamp
, u32 preferred
, u32 valid
)
3664 struct ifa_cacheinfo ci
;
3666 ci
.cstamp
= cstamp_delta(cstamp
);
3667 ci
.tstamp
= cstamp_delta(tstamp
);
3668 ci
.ifa_prefered
= preferred
;
3669 ci
.ifa_valid
= valid
;
3671 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
3674 static inline int rt_scope(int ifa_scope
)
3676 if (ifa_scope
& IFA_HOST
)
3677 return RT_SCOPE_HOST
;
3678 else if (ifa_scope
& IFA_LINK
)
3679 return RT_SCOPE_LINK
;
3680 else if (ifa_scope
& IFA_SITE
)
3681 return RT_SCOPE_SITE
;
3683 return RT_SCOPE_UNIVERSE
;
3686 static inline int inet6_ifaddr_msgsize(void)
3688 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
3689 + nla_total_size(16) /* IFA_ADDRESS */
3690 + nla_total_size(sizeof(struct ifa_cacheinfo
));
3693 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
3694 u32 portid
, u32 seq
, int event
, unsigned int flags
)
3696 struct nlmsghdr
*nlh
;
3697 u32 preferred
, valid
;
3699 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3703 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
3704 ifa
->idev
->dev
->ifindex
);
3706 if (!(ifa
->flags
&IFA_F_PERMANENT
)) {
3707 preferred
= ifa
->prefered_lft
;
3708 valid
= ifa
->valid_lft
;
3709 if (preferred
!= INFINITY_LIFE_TIME
) {
3710 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
3711 if (preferred
> tval
)
3715 if (valid
!= INFINITY_LIFE_TIME
) {
3723 preferred
= INFINITY_LIFE_TIME
;
3724 valid
= INFINITY_LIFE_TIME
;
3727 if (nla_put(skb
, IFA_ADDRESS
, 16, &ifa
->addr
) < 0 ||
3728 put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0) {
3729 nlmsg_cancel(skb
, nlh
);
3733 return nlmsg_end(skb
, nlh
);
3736 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
3737 u32 portid
, u32 seq
, int event
, u16 flags
)
3739 struct nlmsghdr
*nlh
;
3740 u8 scope
= RT_SCOPE_UNIVERSE
;
3741 int ifindex
= ifmca
->idev
->dev
->ifindex
;
3743 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
3744 scope
= RT_SCOPE_SITE
;
3746 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3750 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3751 if (nla_put(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
) < 0 ||
3752 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
3753 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3754 nlmsg_cancel(skb
, nlh
);
3758 return nlmsg_end(skb
, nlh
);
3761 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
3762 u32 portid
, u32 seq
, int event
, unsigned int flags
)
3764 struct nlmsghdr
*nlh
;
3765 u8 scope
= RT_SCOPE_UNIVERSE
;
3766 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
3768 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
3769 scope
= RT_SCOPE_SITE
;
3771 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3775 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3776 if (nla_put(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
) < 0 ||
3777 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
3778 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3779 nlmsg_cancel(skb
, nlh
);
3783 return nlmsg_end(skb
, nlh
);
3792 /* called with rcu_read_lock() */
3793 static int in6_dump_addrs(struct inet6_dev
*idev
, struct sk_buff
*skb
,
3794 struct netlink_callback
*cb
, enum addr_type_t type
,
3795 int s_ip_idx
, int *p_ip_idx
)
3797 struct ifmcaddr6
*ifmca
;
3798 struct ifacaddr6
*ifaca
;
3800 int ip_idx
= *p_ip_idx
;
3802 read_lock_bh(&idev
->lock
);
3804 case UNICAST_ADDR
: {
3805 struct inet6_ifaddr
*ifa
;
3807 /* unicast address incl. temp addr */
3808 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
3809 if (++ip_idx
< s_ip_idx
)
3811 err
= inet6_fill_ifaddr(skb
, ifa
,
3812 NETLINK_CB(cb
->skb
).portid
,
3821 case MULTICAST_ADDR
:
3822 /* multicast address */
3823 for (ifmca
= idev
->mc_list
; ifmca
;
3824 ifmca
= ifmca
->next
, ip_idx
++) {
3825 if (ip_idx
< s_ip_idx
)
3827 err
= inet6_fill_ifmcaddr(skb
, ifmca
,
3828 NETLINK_CB(cb
->skb
).portid
,
3837 /* anycast address */
3838 for (ifaca
= idev
->ac_list
; ifaca
;
3839 ifaca
= ifaca
->aca_next
, ip_idx
++) {
3840 if (ip_idx
< s_ip_idx
)
3842 err
= inet6_fill_ifacaddr(skb
, ifaca
,
3843 NETLINK_CB(cb
->skb
).portid
,
3854 read_unlock_bh(&idev
->lock
);
3859 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3860 enum addr_type_t type
)
3862 struct net
*net
= sock_net(skb
->sk
);
3865 int s_idx
, s_ip_idx
;
3866 struct net_device
*dev
;
3867 struct inet6_dev
*idev
;
3868 struct hlist_head
*head
;
3869 struct hlist_node
*node
;
3872 s_idx
= idx
= cb
->args
[1];
3873 s_ip_idx
= ip_idx
= cb
->args
[2];
3876 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
3878 head
= &net
->dev_index_head
[h
];
3879 hlist_for_each_entry_rcu(dev
, node
, head
, index_hlist
) {
3882 if (h
> s_h
|| idx
> s_idx
)
3885 idev
= __in6_dev_get(dev
);
3889 if (in6_dump_addrs(idev
, skb
, cb
, type
,
3890 s_ip_idx
, &ip_idx
) <= 0)
3900 cb
->args
[2] = ip_idx
;
3905 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3907 enum addr_type_t type
= UNICAST_ADDR
;
3909 return inet6_dump_addr(skb
, cb
, type
);
3912 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3914 enum addr_type_t type
= MULTICAST_ADDR
;
3916 return inet6_dump_addr(skb
, cb
, type
);
3920 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3922 enum addr_type_t type
= ANYCAST_ADDR
;
3924 return inet6_dump_addr(skb
, cb
, type
);
3927 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
*nlh
,
3930 struct net
*net
= sock_net(in_skb
->sk
);
3931 struct ifaddrmsg
*ifm
;
3932 struct nlattr
*tb
[IFA_MAX
+1];
3933 struct in6_addr
*addr
= NULL
;
3934 struct net_device
*dev
= NULL
;
3935 struct inet6_ifaddr
*ifa
;
3936 struct sk_buff
*skb
;
3939 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3943 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3949 ifm
= nlmsg_data(nlh
);
3951 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3953 ifa
= ipv6_get_ifaddr(net
, addr
, dev
, 1);
3955 err
= -EADDRNOTAVAIL
;
3959 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
);
3965 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).portid
,
3966 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
3968 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3969 WARN_ON(err
== -EMSGSIZE
);
3973 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).portid
);
3980 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
3982 struct sk_buff
*skb
;
3983 struct net
*net
= dev_net(ifa
->idev
->dev
);
3986 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
3990 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
3992 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3993 WARN_ON(err
== -EMSGSIZE
);
3997 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
4001 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
4004 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
4005 __s32
*array
, int bytes
)
4007 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
4009 memset(array
, 0, bytes
);
4010 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
4011 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
4012 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
4013 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
4014 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
4015 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
4016 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
4017 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
4018 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] =
4019 jiffies_to_msecs(cnf
->rtr_solicit_interval
);
4020 array
[DEVCONF_RTR_SOLICIT_DELAY
] =
4021 jiffies_to_msecs(cnf
->rtr_solicit_delay
);
4022 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
4023 #ifdef CONFIG_IPV6_PRIVACY
4024 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
4025 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
4026 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
4027 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
4028 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
4030 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
4031 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
4032 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
4033 #ifdef CONFIG_IPV6_ROUTER_PREF
4034 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
4035 array
[DEVCONF_RTR_PROBE_INTERVAL
] =
4036 jiffies_to_msecs(cnf
->rtr_probe_interval
);
4037 #ifdef CONFIG_IPV6_ROUTE_INFO
4038 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
4041 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
4042 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
4043 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4044 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
4046 #ifdef CONFIG_IPV6_MROUTE
4047 array
[DEVCONF_MC_FORWARDING
] = cnf
->mc_forwarding
;
4049 array
[DEVCONF_DISABLE_IPV6
] = cnf
->disable_ipv6
;
4050 array
[DEVCONF_ACCEPT_DAD
] = cnf
->accept_dad
;
4051 array
[DEVCONF_FORCE_TLLAO
] = cnf
->force_tllao
;
4052 array
[DEVCONF_NDISC_NOTIFY
] = cnf
->ndisc_notify
;
4055 static inline size_t inet6_ifla6_size(void)
4057 return nla_total_size(4) /* IFLA_INET6_FLAGS */
4058 + nla_total_size(sizeof(struct ifla_cacheinfo
))
4059 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
4060 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
4061 + nla_total_size(ICMP6_MIB_MAX
* 8); /* IFLA_INET6_ICMP6STATS */
4064 static inline size_t inet6_if_nlmsg_size(void)
4066 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
4067 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
4068 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
4069 + nla_total_size(4) /* IFLA_MTU */
4070 + nla_total_size(4) /* IFLA_LINK */
4071 + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
4074 static inline void __snmp6_fill_statsdev(u64
*stats
, atomic_long_t
*mib
,
4075 int items
, int bytes
)
4078 int pad
= bytes
- sizeof(u64
) * items
;
4081 /* Use put_unaligned() because stats may not be aligned for u64. */
4082 put_unaligned(items
, &stats
[0]);
4083 for (i
= 1; i
< items
; i
++)
4084 put_unaligned(atomic_long_read(&mib
[i
]), &stats
[i
]);
4086 memset(&stats
[items
], 0, pad
);
4089 static inline void __snmp6_fill_stats64(u64
*stats
, void __percpu
**mib
,
4090 int items
, int bytes
, size_t syncpoff
)
4093 int pad
= bytes
- sizeof(u64
) * items
;
4096 /* Use put_unaligned() because stats may not be aligned for u64. */
4097 put_unaligned(items
, &stats
[0]);
4098 for (i
= 1; i
< items
; i
++)
4099 put_unaligned(snmp_fold_field64(mib
, i
, syncpoff
), &stats
[i
]);
4101 memset(&stats
[items
], 0, pad
);
4104 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
4108 case IFLA_INET6_STATS
:
4109 __snmp6_fill_stats64(stats
, (void __percpu
**)idev
->stats
.ipv6
,
4110 IPSTATS_MIB_MAX
, bytes
, offsetof(struct ipstats_mib
, syncp
));
4112 case IFLA_INET6_ICMP6STATS
:
4113 __snmp6_fill_statsdev(stats
, idev
->stats
.icmpv6dev
->mibs
, ICMP6_MIB_MAX
, bytes
);
4118 static int inet6_fill_ifla6_attrs(struct sk_buff
*skb
, struct inet6_dev
*idev
)
4121 struct ifla_cacheinfo ci
;
4123 if (nla_put_u32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
))
4124 goto nla_put_failure
;
4125 ci
.max_reasm_len
= IPV6_MAXPLEN
;
4126 ci
.tstamp
= cstamp_delta(idev
->tstamp
);
4127 ci
.reachable_time
= jiffies_to_msecs(idev
->nd_parms
->reachable_time
);
4128 ci
.retrans_time
= jiffies_to_msecs(idev
->nd_parms
->retrans_time
);
4129 if (nla_put(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
))
4130 goto nla_put_failure
;
4131 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
4133 goto nla_put_failure
;
4134 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
4136 /* XXX - MC not implemented */
4138 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
4140 goto nla_put_failure
;
4141 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
4143 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
4145 goto nla_put_failure
;
4146 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
4154 static size_t inet6_get_link_af_size(const struct net_device
*dev
)
4156 if (!__in6_dev_get(dev
))
4159 return inet6_ifla6_size();
4162 static int inet6_fill_link_af(struct sk_buff
*skb
, const struct net_device
*dev
)
4164 struct inet6_dev
*idev
= __in6_dev_get(dev
);
4169 if (inet6_fill_ifla6_attrs(skb
, idev
) < 0)
4175 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
4176 u32 portid
, u32 seq
, int event
, unsigned int flags
)
4178 struct net_device
*dev
= idev
->dev
;
4179 struct ifinfomsg
*hdr
;
4180 struct nlmsghdr
*nlh
;
4183 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*hdr
), flags
);
4187 hdr
= nlmsg_data(nlh
);
4188 hdr
->ifi_family
= AF_INET6
;
4190 hdr
->ifi_type
= dev
->type
;
4191 hdr
->ifi_index
= dev
->ifindex
;
4192 hdr
->ifi_flags
= dev_get_flags(dev
);
4193 hdr
->ifi_change
= 0;
4195 if (nla_put_string(skb
, IFLA_IFNAME
, dev
->name
) ||
4197 nla_put(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
)) ||
4198 nla_put_u32(skb
, IFLA_MTU
, dev
->mtu
) ||
4199 (dev
->ifindex
!= dev
->iflink
&&
4200 nla_put_u32(skb
, IFLA_LINK
, dev
->iflink
)))
4201 goto nla_put_failure
;
4202 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
4203 if (protoinfo
== NULL
)
4204 goto nla_put_failure
;
4206 if (inet6_fill_ifla6_attrs(skb
, idev
) < 0)
4207 goto nla_put_failure
;
4209 nla_nest_end(skb
, protoinfo
);
4210 return nlmsg_end(skb
, nlh
);
4213 nlmsg_cancel(skb
, nlh
);
4217 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4219 struct net
*net
= sock_net(skb
->sk
);
4222 struct net_device
*dev
;
4223 struct inet6_dev
*idev
;
4224 struct hlist_head
*head
;
4225 struct hlist_node
*node
;
4228 s_idx
= cb
->args
[1];
4231 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
4233 head
= &net
->dev_index_head
[h
];
4234 hlist_for_each_entry_rcu(dev
, node
, head
, index_hlist
) {
4237 idev
= __in6_dev_get(dev
);
4240 if (inet6_fill_ifinfo(skb
, idev
,
4241 NETLINK_CB(cb
->skb
).portid
,
4243 RTM_NEWLINK
, NLM_F_MULTI
) <= 0)
4257 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
4259 struct sk_buff
*skb
;
4260 struct net
*net
= dev_net(idev
->dev
);
4263 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
4267 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
4269 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
4270 WARN_ON(err
== -EMSGSIZE
);
4274 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFINFO
, NULL
, GFP_ATOMIC
);
4278 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFINFO
, err
);
4281 static inline size_t inet6_prefix_nlmsg_size(void)
4283 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
4284 + nla_total_size(sizeof(struct in6_addr
))
4285 + nla_total_size(sizeof(struct prefix_cacheinfo
));
4288 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
4289 struct prefix_info
*pinfo
, u32 portid
, u32 seq
,
4290 int event
, unsigned int flags
)
4292 struct prefixmsg
*pmsg
;
4293 struct nlmsghdr
*nlh
;
4294 struct prefix_cacheinfo ci
;
4296 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*pmsg
), flags
);
4300 pmsg
= nlmsg_data(nlh
);
4301 pmsg
->prefix_family
= AF_INET6
;
4302 pmsg
->prefix_pad1
= 0;
4303 pmsg
->prefix_pad2
= 0;
4304 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
4305 pmsg
->prefix_len
= pinfo
->prefix_len
;
4306 pmsg
->prefix_type
= pinfo
->type
;
4307 pmsg
->prefix_pad3
= 0;
4308 pmsg
->prefix_flags
= 0;
4310 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
4311 if (pinfo
->autoconf
)
4312 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
4314 if (nla_put(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
))
4315 goto nla_put_failure
;
4316 ci
.preferred_time
= ntohl(pinfo
->prefered
);
4317 ci
.valid_time
= ntohl(pinfo
->valid
);
4318 if (nla_put(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
))
4319 goto nla_put_failure
;
4320 return nlmsg_end(skb
, nlh
);
4323 nlmsg_cancel(skb
, nlh
);
4327 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
4328 struct prefix_info
*pinfo
)
4330 struct sk_buff
*skb
;
4331 struct net
*net
= dev_net(idev
->dev
);
4334 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
4338 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
4340 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
4341 WARN_ON(err
== -EMSGSIZE
);
4345 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
4349 rtnl_set_sk_err(net
, RTNLGRP_IPV6_PREFIX
, err
);
4352 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
4354 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
4359 * If the address was optimistic
4360 * we inserted the route at the start of
4361 * our DAD process, so we don't need
4364 if (!(ifp
->rt
->rt6i_node
))
4365 ip6_ins_rt(ifp
->rt
);
4366 if (ifp
->idev
->cnf
.forwarding
)
4367 addrconf_join_anycast(ifp
);
4370 if (ifp
->idev
->cnf
.forwarding
)
4371 addrconf_leave_anycast(ifp
);
4372 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
4373 dst_hold(&ifp
->rt
->dst
);
4375 if (ip6_del_rt(ifp
->rt
))
4376 dst_free(&ifp
->rt
->dst
);
4381 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
4384 if (likely(ifp
->idev
->dead
== 0))
4385 __ipv6_ifa_notify(event
, ifp
);
4386 rcu_read_unlock_bh();
4389 #ifdef CONFIG_SYSCTL
4392 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
,
4393 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4395 int *valp
= ctl
->data
;
4402 * ctl->data points to idev->cnf.forwarding, we should
4403 * not modify it until we get the rtnl lock.
4408 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
4411 ret
= addrconf_fixup_forwarding(ctl
, valp
, val
);
4417 static void dev_disable_change(struct inet6_dev
*idev
)
4419 if (!idev
|| !idev
->dev
)
4422 if (idev
->cnf
.disable_ipv6
)
4423 addrconf_notify(NULL
, NETDEV_DOWN
, idev
->dev
);
4425 addrconf_notify(NULL
, NETDEV_UP
, idev
->dev
);
4428 static void addrconf_disable_change(struct net
*net
, __s32 newf
)
4430 struct net_device
*dev
;
4431 struct inet6_dev
*idev
;
4434 for_each_netdev_rcu(net
, dev
) {
4435 idev
= __in6_dev_get(dev
);
4437 int changed
= (!idev
->cnf
.disable_ipv6
) ^ (!newf
);
4438 idev
->cnf
.disable_ipv6
= newf
;
4440 dev_disable_change(idev
);
4446 static int addrconf_disable_ipv6(struct ctl_table
*table
, int *p
, int newf
)
4451 if (!rtnl_trylock())
4452 return restart_syscall();
4454 net
= (struct net
*)table
->extra2
;
4458 if (p
== &net
->ipv6
.devconf_dflt
->disable_ipv6
) {
4463 if (p
== &net
->ipv6
.devconf_all
->disable_ipv6
) {
4464 net
->ipv6
.devconf_dflt
->disable_ipv6
= newf
;
4465 addrconf_disable_change(net
, newf
);
4466 } else if ((!newf
) ^ (!old
))
4467 dev_disable_change((struct inet6_dev
*)table
->extra1
);
4474 int addrconf_sysctl_disable(ctl_table
*ctl
, int write
,
4475 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4477 int *valp
= ctl
->data
;
4484 * ctl->data points to idev->cnf.disable_ipv6, we should
4485 * not modify it until we get the rtnl lock.
4490 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
4493 ret
= addrconf_disable_ipv6(ctl
, valp
, val
);
4499 static struct addrconf_sysctl_table
4501 struct ctl_table_header
*sysctl_header
;
4502 ctl_table addrconf_vars
[DEVCONF_MAX
+1];
4503 } addrconf_sysctl __read_mostly
= {
4504 .sysctl_header
= NULL
,
4507 .procname
= "forwarding",
4508 .data
= &ipv6_devconf
.forwarding
,
4509 .maxlen
= sizeof(int),
4511 .proc_handler
= addrconf_sysctl_forward
,
4514 .procname
= "hop_limit",
4515 .data
= &ipv6_devconf
.hop_limit
,
4516 .maxlen
= sizeof(int),
4518 .proc_handler
= proc_dointvec
,
4522 .data
= &ipv6_devconf
.mtu6
,
4523 .maxlen
= sizeof(int),
4525 .proc_handler
= proc_dointvec
,
4528 .procname
= "accept_ra",
4529 .data
= &ipv6_devconf
.accept_ra
,
4530 .maxlen
= sizeof(int),
4532 .proc_handler
= proc_dointvec
,
4535 .procname
= "accept_redirects",
4536 .data
= &ipv6_devconf
.accept_redirects
,
4537 .maxlen
= sizeof(int),
4539 .proc_handler
= proc_dointvec
,
4542 .procname
= "autoconf",
4543 .data
= &ipv6_devconf
.autoconf
,
4544 .maxlen
= sizeof(int),
4546 .proc_handler
= proc_dointvec
,
4549 .procname
= "dad_transmits",
4550 .data
= &ipv6_devconf
.dad_transmits
,
4551 .maxlen
= sizeof(int),
4553 .proc_handler
= proc_dointvec
,
4556 .procname
= "router_solicitations",
4557 .data
= &ipv6_devconf
.rtr_solicits
,
4558 .maxlen
= sizeof(int),
4560 .proc_handler
= proc_dointvec
,
4563 .procname
= "router_solicitation_interval",
4564 .data
= &ipv6_devconf
.rtr_solicit_interval
,
4565 .maxlen
= sizeof(int),
4567 .proc_handler
= proc_dointvec_jiffies
,
4570 .procname
= "router_solicitation_delay",
4571 .data
= &ipv6_devconf
.rtr_solicit_delay
,
4572 .maxlen
= sizeof(int),
4574 .proc_handler
= proc_dointvec_jiffies
,
4577 .procname
= "force_mld_version",
4578 .data
= &ipv6_devconf
.force_mld_version
,
4579 .maxlen
= sizeof(int),
4581 .proc_handler
= proc_dointvec
,
4583 #ifdef CONFIG_IPV6_PRIVACY
4585 .procname
= "use_tempaddr",
4586 .data
= &ipv6_devconf
.use_tempaddr
,
4587 .maxlen
= sizeof(int),
4589 .proc_handler
= proc_dointvec
,
4592 .procname
= "temp_valid_lft",
4593 .data
= &ipv6_devconf
.temp_valid_lft
,
4594 .maxlen
= sizeof(int),
4596 .proc_handler
= proc_dointvec
,
4599 .procname
= "temp_prefered_lft",
4600 .data
= &ipv6_devconf
.temp_prefered_lft
,
4601 .maxlen
= sizeof(int),
4603 .proc_handler
= proc_dointvec
,
4606 .procname
= "regen_max_retry",
4607 .data
= &ipv6_devconf
.regen_max_retry
,
4608 .maxlen
= sizeof(int),
4610 .proc_handler
= proc_dointvec
,
4613 .procname
= "max_desync_factor",
4614 .data
= &ipv6_devconf
.max_desync_factor
,
4615 .maxlen
= sizeof(int),
4617 .proc_handler
= proc_dointvec
,
4621 .procname
= "max_addresses",
4622 .data
= &ipv6_devconf
.max_addresses
,
4623 .maxlen
= sizeof(int),
4625 .proc_handler
= proc_dointvec
,
4628 .procname
= "accept_ra_defrtr",
4629 .data
= &ipv6_devconf
.accept_ra_defrtr
,
4630 .maxlen
= sizeof(int),
4632 .proc_handler
= proc_dointvec
,
4635 .procname
= "accept_ra_pinfo",
4636 .data
= &ipv6_devconf
.accept_ra_pinfo
,
4637 .maxlen
= sizeof(int),
4639 .proc_handler
= proc_dointvec
,
4641 #ifdef CONFIG_IPV6_ROUTER_PREF
4643 .procname
= "accept_ra_rtr_pref",
4644 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
4645 .maxlen
= sizeof(int),
4647 .proc_handler
= proc_dointvec
,
4650 .procname
= "router_probe_interval",
4651 .data
= &ipv6_devconf
.rtr_probe_interval
,
4652 .maxlen
= sizeof(int),
4654 .proc_handler
= proc_dointvec_jiffies
,
4656 #ifdef CONFIG_IPV6_ROUTE_INFO
4658 .procname
= "accept_ra_rt_info_max_plen",
4659 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
4660 .maxlen
= sizeof(int),
4662 .proc_handler
= proc_dointvec
,
4667 .procname
= "proxy_ndp",
4668 .data
= &ipv6_devconf
.proxy_ndp
,
4669 .maxlen
= sizeof(int),
4671 .proc_handler
= proc_dointvec
,
4674 .procname
= "accept_source_route",
4675 .data
= &ipv6_devconf
.accept_source_route
,
4676 .maxlen
= sizeof(int),
4678 .proc_handler
= proc_dointvec
,
4680 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4682 .procname
= "optimistic_dad",
4683 .data
= &ipv6_devconf
.optimistic_dad
,
4684 .maxlen
= sizeof(int),
4686 .proc_handler
= proc_dointvec
,
4690 #ifdef CONFIG_IPV6_MROUTE
4692 .procname
= "mc_forwarding",
4693 .data
= &ipv6_devconf
.mc_forwarding
,
4694 .maxlen
= sizeof(int),
4696 .proc_handler
= proc_dointvec
,
4700 .procname
= "disable_ipv6",
4701 .data
= &ipv6_devconf
.disable_ipv6
,
4702 .maxlen
= sizeof(int),
4704 .proc_handler
= addrconf_sysctl_disable
,
4707 .procname
= "accept_dad",
4708 .data
= &ipv6_devconf
.accept_dad
,
4709 .maxlen
= sizeof(int),
4711 .proc_handler
= proc_dointvec
,
4714 .procname
= "force_tllao",
4715 .data
= &ipv6_devconf
.force_tllao
,
4716 .maxlen
= sizeof(int),
4718 .proc_handler
= proc_dointvec
4721 .procname
= "ndisc_notify",
4722 .data
= &ipv6_devconf
.ndisc_notify
,
4723 .maxlen
= sizeof(int),
4725 .proc_handler
= proc_dointvec
4733 static int __addrconf_sysctl_register(struct net
*net
, char *dev_name
,
4734 struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
4737 struct addrconf_sysctl_table
*t
;
4738 char path
[sizeof("net/ipv6/conf/") + IFNAMSIZ
];
4740 t
= kmemdup(&addrconf_sysctl
, sizeof(*t
), GFP_KERNEL
);
4744 for (i
= 0; t
->addrconf_vars
[i
].data
; i
++) {
4745 t
->addrconf_vars
[i
].data
+= (char *)p
- (char *)&ipv6_devconf
;
4746 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
4747 t
->addrconf_vars
[i
].extra2
= net
;
4750 snprintf(path
, sizeof(path
), "net/ipv6/conf/%s", dev_name
);
4752 t
->sysctl_header
= register_net_sysctl(net
, path
, t
->addrconf_vars
);
4753 if (t
->sysctl_header
== NULL
)
4765 static void __addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
4767 struct addrconf_sysctl_table
*t
;
4769 if (p
->sysctl
== NULL
)
4774 unregister_net_sysctl_table(t
->sysctl_header
);
4778 static void addrconf_sysctl_register(struct inet6_dev
*idev
)
4780 neigh_sysctl_register(idev
->dev
, idev
->nd_parms
, "ipv6",
4781 &ndisc_ifinfo_sysctl_change
);
4782 __addrconf_sysctl_register(dev_net(idev
->dev
), idev
->dev
->name
,
4786 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
4788 __addrconf_sysctl_unregister(&idev
->cnf
);
4789 neigh_sysctl_unregister(idev
->nd_parms
);
4795 static int __net_init
addrconf_init_net(struct net
*net
)
4798 struct ipv6_devconf
*all
, *dflt
;
4801 all
= &ipv6_devconf
;
4802 dflt
= &ipv6_devconf_dflt
;
4804 if (!net_eq(net
, &init_net
)) {
4805 all
= kmemdup(all
, sizeof(ipv6_devconf
), GFP_KERNEL
);
4809 dflt
= kmemdup(dflt
, sizeof(ipv6_devconf_dflt
), GFP_KERNEL
);
4811 goto err_alloc_dflt
;
4813 /* these will be inherited by all namespaces */
4814 dflt
->autoconf
= ipv6_defaults
.autoconf
;
4815 dflt
->disable_ipv6
= ipv6_defaults
.disable_ipv6
;
4818 net
->ipv6
.devconf_all
= all
;
4819 net
->ipv6
.devconf_dflt
= dflt
;
4821 #ifdef CONFIG_SYSCTL
4822 err
= __addrconf_sysctl_register(net
, "all", NULL
, all
);
4826 err
= __addrconf_sysctl_register(net
, "default", NULL
, dflt
);
4832 #ifdef CONFIG_SYSCTL
4834 __addrconf_sysctl_unregister(all
);
4844 static void __net_exit
addrconf_exit_net(struct net
*net
)
4846 #ifdef CONFIG_SYSCTL
4847 __addrconf_sysctl_unregister(net
->ipv6
.devconf_dflt
);
4848 __addrconf_sysctl_unregister(net
->ipv6
.devconf_all
);
4850 if (!net_eq(net
, &init_net
)) {
4851 kfree(net
->ipv6
.devconf_dflt
);
4852 kfree(net
->ipv6
.devconf_all
);
4856 static struct pernet_operations addrconf_ops
= {
4857 .init
= addrconf_init_net
,
4858 .exit
= addrconf_exit_net
,
4865 int register_inet6addr_notifier(struct notifier_block
*nb
)
4867 return atomic_notifier_chain_register(&inet6addr_chain
, nb
);
4869 EXPORT_SYMBOL(register_inet6addr_notifier
);
4871 int unregister_inet6addr_notifier(struct notifier_block
*nb
)
4873 return atomic_notifier_chain_unregister(&inet6addr_chain
, nb
);
4875 EXPORT_SYMBOL(unregister_inet6addr_notifier
);
4877 static struct rtnl_af_ops inet6_ops
= {
4879 .fill_link_af
= inet6_fill_link_af
,
4880 .get_link_af_size
= inet6_get_link_af_size
,
4884 * Init / cleanup code
4887 int __init
addrconf_init(void)
4891 err
= ipv6_addr_label_init();
4893 pr_crit("%s: cannot initialize default policy table: %d\n",
4898 err
= register_pernet_subsys(&addrconf_ops
);
4902 /* The addrconf netdev notifier requires that loopback_dev
4903 * has it's ipv6 private information allocated and setup
4904 * before it can bring up and give link-local addresses
4905 * to other devices which are up.
4907 * Unfortunately, loopback_dev is not necessarily the first
4908 * entry in the global dev_base list of net devices. In fact,
4909 * it is likely to be the very last entry on that list.
4910 * So this causes the notifier registry below to try and
4911 * give link-local addresses to all devices besides loopback_dev
4912 * first, then loopback_dev, which cases all the non-loopback_dev
4913 * devices to fail to get a link-local address.
4915 * So, as a temporary fix, allocate the ipv6 structure for
4916 * loopback_dev first by hand.
4917 * Longer term, all of the dependencies ipv6 has upon the loopback
4918 * device and it being up should be removed.
4921 if (!ipv6_add_dev(init_net
.loopback_dev
))
4927 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
4928 INIT_HLIST_HEAD(&inet6_addr_lst
[i
]);
4930 register_netdevice_notifier(&ipv6_dev_notf
);
4934 err
= rtnl_af_register(&inet6_ops
);
4938 err
= __rtnl_register(PF_INET6
, RTM_GETLINK
, NULL
, inet6_dump_ifinfo
,
4943 /* Only the first call to __rtnl_register can fail */
4944 __rtnl_register(PF_INET6
, RTM_NEWADDR
, inet6_rtm_newaddr
, NULL
, NULL
);
4945 __rtnl_register(PF_INET6
, RTM_DELADDR
, inet6_rtm_deladdr
, NULL
, NULL
);
4946 __rtnl_register(PF_INET6
, RTM_GETADDR
, inet6_rtm_getaddr
,
4947 inet6_dump_ifaddr
, NULL
);
4948 __rtnl_register(PF_INET6
, RTM_GETMULTICAST
, NULL
,
4949 inet6_dump_ifmcaddr
, NULL
);
4950 __rtnl_register(PF_INET6
, RTM_GETANYCAST
, NULL
,
4951 inet6_dump_ifacaddr
, NULL
);
4952 __rtnl_register(PF_INET6
, RTM_GETNETCONF
, inet6_netconf_get_devconf
,
4955 ipv6_addr_label_rtnl_register();
4959 rtnl_af_unregister(&inet6_ops
);
4961 unregister_netdevice_notifier(&ipv6_dev_notf
);
4963 unregister_pernet_subsys(&addrconf_ops
);
4965 ipv6_addr_label_cleanup();
4970 void addrconf_cleanup(void)
4972 struct net_device
*dev
;
4975 unregister_netdevice_notifier(&ipv6_dev_notf
);
4976 unregister_pernet_subsys(&addrconf_ops
);
4977 ipv6_addr_label_cleanup();
4981 __rtnl_af_unregister(&inet6_ops
);
4983 /* clean dev list */
4984 for_each_netdev(&init_net
, dev
) {
4985 if (__in6_dev_get(dev
) == NULL
)
4987 addrconf_ifdown(dev
, 1);
4989 addrconf_ifdown(init_net
.loopback_dev
, 2);
4994 spin_lock_bh(&addrconf_hash_lock
);
4995 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
4996 WARN_ON(!hlist_empty(&inet6_addr_lst
[i
]));
4997 spin_unlock_bh(&addrconf_hash_lock
);
4999 del_timer(&addr_chk_timer
);