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 unsigned int hash
= inet6_addr_hash(addr
);
1425 hlist_for_each_entry_rcu(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
1426 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1428 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1429 !(ifp
->flags
&IFA_F_TENTATIVE
) &&
1430 (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1431 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))) {
1432 rcu_read_unlock_bh();
1437 rcu_read_unlock_bh();
1440 EXPORT_SYMBOL(ipv6_chk_addr
);
1442 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
1443 struct net_device
*dev
)
1445 unsigned int hash
= inet6_addr_hash(addr
);
1446 struct inet6_ifaddr
*ifp
;
1448 hlist_for_each_entry(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
1449 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1451 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1452 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1459 int ipv6_chk_prefix(const struct in6_addr
*addr
, struct net_device
*dev
)
1461 struct inet6_dev
*idev
;
1462 struct inet6_ifaddr
*ifa
;
1467 idev
= __in6_dev_get(dev
);
1469 read_lock_bh(&idev
->lock
);
1470 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
1471 onlink
= ipv6_prefix_equal(addr
, &ifa
->addr
,
1476 read_unlock_bh(&idev
->lock
);
1481 EXPORT_SYMBOL(ipv6_chk_prefix
);
1483 struct inet6_ifaddr
*ipv6_get_ifaddr(struct net
*net
, const struct in6_addr
*addr
,
1484 struct net_device
*dev
, int strict
)
1486 struct inet6_ifaddr
*ifp
, *result
= NULL
;
1487 unsigned int hash
= inet6_addr_hash(addr
);
1490 hlist_for_each_entry_rcu_bh(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
1491 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1493 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1494 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1495 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1502 rcu_read_unlock_bh();
1507 /* Gets referenced address, destroys ifaddr */
1509 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
, int dad_failed
)
1511 if (ifp
->flags
&IFA_F_PERMANENT
) {
1512 spin_lock_bh(&ifp
->lock
);
1513 addrconf_del_timer(ifp
);
1514 ifp
->flags
|= IFA_F_TENTATIVE
;
1516 ifp
->flags
|= IFA_F_DADFAILED
;
1517 spin_unlock_bh(&ifp
->lock
);
1519 ipv6_ifa_notify(0, ifp
);
1521 #ifdef CONFIG_IPV6_PRIVACY
1522 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1523 struct inet6_ifaddr
*ifpub
;
1524 spin_lock_bh(&ifp
->lock
);
1527 in6_ifa_hold(ifpub
);
1528 spin_unlock_bh(&ifp
->lock
);
1529 ipv6_create_tempaddr(ifpub
, ifp
);
1532 spin_unlock_bh(&ifp
->lock
);
1540 static int addrconf_dad_end(struct inet6_ifaddr
*ifp
)
1544 spin_lock(&ifp
->state_lock
);
1545 if (ifp
->state
== INET6_IFADDR_STATE_DAD
) {
1546 ifp
->state
= INET6_IFADDR_STATE_POSTDAD
;
1549 spin_unlock(&ifp
->state_lock
);
1554 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1556 struct inet6_dev
*idev
= ifp
->idev
;
1558 if (addrconf_dad_end(ifp
)) {
1563 net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n",
1564 ifp
->idev
->dev
->name
, &ifp
->addr
);
1566 if (idev
->cnf
.accept_dad
> 1 && !idev
->cnf
.disable_ipv6
) {
1567 struct in6_addr addr
;
1569 addr
.s6_addr32
[0] = htonl(0xfe800000);
1570 addr
.s6_addr32
[1] = 0;
1572 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) &&
1573 ipv6_addr_equal(&ifp
->addr
, &addr
)) {
1574 /* DAD failed for link-local based on MAC address */
1575 idev
->cnf
.disable_ipv6
= 1;
1577 pr_info("%s: IPv6 being disabled!\n",
1578 ifp
->idev
->dev
->name
);
1582 addrconf_dad_stop(ifp
, 1);
1585 /* Join to solicited addr multicast group. */
1587 void addrconf_join_solict(struct net_device
*dev
, const struct in6_addr
*addr
)
1589 struct in6_addr maddr
;
1591 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1594 addrconf_addr_solict_mult(addr
, &maddr
);
1595 ipv6_dev_mc_inc(dev
, &maddr
);
1598 void addrconf_leave_solict(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
1600 struct in6_addr maddr
;
1602 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1605 addrconf_addr_solict_mult(addr
, &maddr
);
1606 __ipv6_dev_mc_dec(idev
, &maddr
);
1609 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1611 struct in6_addr addr
;
1612 if (ifp
->prefix_len
== 127) /* RFC 6164 */
1614 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1615 if (ipv6_addr_any(&addr
))
1617 ipv6_dev_ac_inc(ifp
->idev
->dev
, &addr
);
1620 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1622 struct in6_addr addr
;
1623 if (ifp
->prefix_len
== 127) /* RFC 6164 */
1625 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1626 if (ipv6_addr_any(&addr
))
1628 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1631 static int addrconf_ifid_eui48(u8
*eui
, struct net_device
*dev
)
1633 if (dev
->addr_len
!= ETH_ALEN
)
1635 memcpy(eui
, dev
->dev_addr
, 3);
1636 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1639 * The zSeries OSA network cards can be shared among various
1640 * OS instances, but the OSA cards have only one MAC address.
1641 * This leads to duplicate address conflicts in conjunction
1642 * with IPv6 if more than one instance uses the same card.
1644 * The driver for these cards can deliver a unique 16-bit
1645 * identifier for each instance sharing the same card. It is
1646 * placed instead of 0xFFFE in the interface identifier. The
1647 * "u" bit of the interface identifier is not inverted in this
1648 * case. Hence the resulting interface identifier has local
1649 * scope according to RFC2373.
1652 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1653 eui
[4] = dev
->dev_id
& 0xFF;
1662 static int addrconf_ifid_eui64(u8
*eui
, struct net_device
*dev
)
1664 if (dev
->addr_len
!= IEEE802154_ADDR_LEN
)
1666 memcpy(eui
, dev
->dev_addr
, 8);
1671 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
1673 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1674 if (dev
->addr_len
!= ARCNET_ALEN
)
1677 eui
[7] = *(u8
*)dev
->dev_addr
;
1681 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
1683 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1685 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1690 static int __ipv6_isatap_ifid(u8
*eui
, __be32 addr
)
1694 eui
[0] = (ipv4_is_zeronet(addr
) || ipv4_is_private_10(addr
) ||
1695 ipv4_is_loopback(addr
) || ipv4_is_linklocal_169(addr
) ||
1696 ipv4_is_private_172(addr
) || ipv4_is_test_192(addr
) ||
1697 ipv4_is_anycast_6to4(addr
) || ipv4_is_private_192(addr
) ||
1698 ipv4_is_test_198(addr
) || ipv4_is_multicast(addr
) ||
1699 ipv4_is_lbcast(addr
)) ? 0x00 : 0x02;
1703 memcpy(eui
+ 4, &addr
, 4);
1707 static int addrconf_ifid_sit(u8
*eui
, struct net_device
*dev
)
1709 if (dev
->priv_flags
& IFF_ISATAP
)
1710 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
1714 static int addrconf_ifid_gre(u8
*eui
, struct net_device
*dev
)
1716 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
1719 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1721 switch (dev
->type
) {
1724 return addrconf_ifid_eui48(eui
, dev
);
1726 return addrconf_ifid_arcnet(eui
, dev
);
1727 case ARPHRD_INFINIBAND
:
1728 return addrconf_ifid_infiniband(eui
, dev
);
1730 return addrconf_ifid_sit(eui
, dev
);
1732 return addrconf_ifid_gre(eui
, dev
);
1733 case ARPHRD_IEEE802154
:
1734 return addrconf_ifid_eui64(eui
, dev
);
1739 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1742 struct inet6_ifaddr
*ifp
;
1744 read_lock_bh(&idev
->lock
);
1745 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
1746 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1747 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1752 read_unlock_bh(&idev
->lock
);
1756 #ifdef CONFIG_IPV6_PRIVACY
1757 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1758 static void __ipv6_regen_rndid(struct inet6_dev
*idev
)
1761 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
1762 idev
->rndid
[0] &= ~0x02;
1765 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1766 * check if generated address is not inappropriate
1768 * - Reserved subnet anycast (RFC 2526)
1769 * 11111101 11....11 1xxxxxxx
1770 * - ISATAP (RFC4214) 6.1
1771 * 00-00-5E-FE-xx-xx-xx-xx
1773 * - XXX: already assigned to an address on the device
1775 if (idev
->rndid
[0] == 0xfd &&
1776 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1777 (idev
->rndid
[7]&0x80))
1779 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1780 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1782 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1787 static void ipv6_regen_rndid(unsigned long data
)
1789 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1790 unsigned long expires
;
1793 write_lock_bh(&idev
->lock
);
1798 __ipv6_regen_rndid(idev
);
1801 idev
->cnf
.temp_prefered_lft
* HZ
-
1802 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
* idev
->nd_parms
->retrans_time
-
1803 idev
->cnf
.max_desync_factor
* HZ
;
1804 if (time_before(expires
, jiffies
)) {
1805 pr_warn("%s: too short regeneration interval; timer disabled for %s\n",
1806 __func__
, idev
->dev
->name
);
1810 if (!mod_timer(&idev
->regen_timer
, expires
))
1814 write_unlock_bh(&idev
->lock
);
1815 rcu_read_unlock_bh();
1819 static void __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
)
1821 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1822 __ipv6_regen_rndid(idev
);
1831 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1832 unsigned long expires
, u32 flags
)
1834 struct fib6_config cfg
= {
1835 .fc_table
= RT6_TABLE_PREFIX
,
1836 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1837 .fc_ifindex
= dev
->ifindex
,
1838 .fc_expires
= expires
,
1840 .fc_flags
= RTF_UP
| flags
,
1841 .fc_nlinfo
.nl_net
= dev_net(dev
),
1842 .fc_protocol
= RTPROT_KERNEL
,
1847 /* Prevent useless cloning on PtP SIT.
1848 This thing is done here expecting that the whole
1849 class of non-broadcast devices need not cloning.
1851 #if IS_ENABLED(CONFIG_IPV6_SIT)
1852 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
1853 cfg
.fc_flags
|= RTF_NONEXTHOP
;
1856 ip6_route_add(&cfg
);
1860 static struct rt6_info
*addrconf_get_prefix_route(const struct in6_addr
*pfx
,
1862 const struct net_device
*dev
,
1863 u32 flags
, u32 noflags
)
1865 struct fib6_node
*fn
;
1866 struct rt6_info
*rt
= NULL
;
1867 struct fib6_table
*table
;
1869 table
= fib6_get_table(dev_net(dev
), RT6_TABLE_PREFIX
);
1873 read_lock_bh(&table
->tb6_lock
);
1874 fn
= fib6_locate(&table
->tb6_root
, pfx
, plen
, NULL
, 0);
1877 for (rt
= fn
->leaf
; rt
; rt
= rt
->dst
.rt6_next
) {
1878 if (rt
->dst
.dev
->ifindex
!= dev
->ifindex
)
1880 if ((rt
->rt6i_flags
& flags
) != flags
)
1882 if ((rt
->rt6i_flags
& noflags
) != 0)
1888 read_unlock_bh(&table
->tb6_lock
);
1893 /* Create "default" multicast route to the interface */
1895 static void addrconf_add_mroute(struct net_device
*dev
)
1897 struct fib6_config cfg
= {
1898 .fc_table
= RT6_TABLE_LOCAL
,
1899 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1900 .fc_ifindex
= dev
->ifindex
,
1903 .fc_nlinfo
.nl_net
= dev_net(dev
),
1906 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
1908 ip6_route_add(&cfg
);
1911 #if IS_ENABLED(CONFIG_IPV6_SIT)
1912 static void sit_route_add(struct net_device
*dev
)
1914 struct fib6_config cfg
= {
1915 .fc_table
= RT6_TABLE_MAIN
,
1916 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1917 .fc_ifindex
= dev
->ifindex
,
1919 .fc_flags
= RTF_UP
| RTF_NONEXTHOP
,
1920 .fc_nlinfo
.nl_net
= dev_net(dev
),
1923 /* prefix length - 96 bits "::d.d.d.d" */
1924 ip6_route_add(&cfg
);
1928 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
1930 struct inet6_dev
*idev
;
1934 idev
= ipv6_find_idev(dev
);
1936 return ERR_PTR(-ENOBUFS
);
1938 if (idev
->cnf
.disable_ipv6
)
1939 return ERR_PTR(-EACCES
);
1941 /* Add default multicast route */
1942 if (!(dev
->flags
& IFF_LOOPBACK
))
1943 addrconf_add_mroute(dev
);
1948 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
, bool sllao
)
1950 struct prefix_info
*pinfo
;
1954 struct inet6_dev
*in6_dev
;
1955 struct net
*net
= dev_net(dev
);
1957 pinfo
= (struct prefix_info
*) opt
;
1959 if (len
< sizeof(struct prefix_info
)) {
1960 ADBG(("addrconf: prefix option too short\n"));
1965 * Validation checks ([ADDRCONF], page 19)
1968 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
1970 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
1973 valid_lft
= ntohl(pinfo
->valid
);
1974 prefered_lft
= ntohl(pinfo
->prefered
);
1976 if (prefered_lft
> valid_lft
) {
1977 net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n");
1981 in6_dev
= in6_dev_get(dev
);
1983 if (in6_dev
== NULL
) {
1984 net_dbg_ratelimited("addrconf: device %s not configured\n",
1990 * Two things going on here:
1991 * 1) Add routes for on-link prefixes
1992 * 2) Configure prefixes with the auto flag set
1995 if (pinfo
->onlink
) {
1996 struct rt6_info
*rt
;
1997 unsigned long rt_expires
;
1999 /* Avoid arithmetic overflow. Really, we could
2000 * save rt_expires in seconds, likely valid_lft,
2001 * but it would require division in fib gc, that it
2005 rt_expires
= addrconf_timeout_fixup(valid_lft
, HZ
);
2007 rt_expires
= addrconf_timeout_fixup(valid_lft
, USER_HZ
);
2009 if (addrconf_finite_timeout(rt_expires
))
2012 rt
= addrconf_get_prefix_route(&pinfo
->prefix
,
2015 RTF_ADDRCONF
| RTF_PREFIX_RT
,
2016 RTF_GATEWAY
| RTF_DEFAULT
);
2019 /* Autoconf prefix route */
2020 if (valid_lft
== 0) {
2023 } else if (addrconf_finite_timeout(rt_expires
)) {
2025 rt6_set_expires(rt
, jiffies
+ rt_expires
);
2027 rt6_clean_expires(rt
);
2029 } else if (valid_lft
) {
2030 clock_t expires
= 0;
2031 int flags
= RTF_ADDRCONF
| RTF_PREFIX_RT
;
2032 if (addrconf_finite_timeout(rt_expires
)) {
2034 flags
|= RTF_EXPIRES
;
2035 expires
= jiffies_to_clock_t(rt_expires
);
2037 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
2038 dev
, expires
, flags
);
2043 /* Try to figure out our local address for this prefix */
2045 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
2046 struct inet6_ifaddr
*ifp
;
2047 struct in6_addr addr
;
2048 int create
= 0, update_lft
= 0;
2050 if (pinfo
->prefix_len
== 64) {
2051 memcpy(&addr
, &pinfo
->prefix
, 8);
2052 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
2053 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
2054 in6_dev_put(in6_dev
);
2059 net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n",
2061 in6_dev_put(in6_dev
);
2066 ifp
= ipv6_get_ifaddr(net
, &addr
, dev
, 1);
2068 if (ifp
== NULL
&& valid_lft
) {
2069 int max_addresses
= in6_dev
->cnf
.max_addresses
;
2072 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2073 if (in6_dev
->cnf
.optimistic_dad
&&
2074 !net
->ipv6
.devconf_all
->forwarding
&& sllao
)
2075 addr_flags
= IFA_F_OPTIMISTIC
;
2078 /* Do not allow to create too much of autoconfigured
2079 * addresses; this would be too easy way to crash kernel.
2081 if (!max_addresses
||
2082 ipv6_count_addresses(in6_dev
) < max_addresses
)
2083 ifp
= ipv6_add_addr(in6_dev
, &addr
, pinfo
->prefix_len
,
2084 addr_type
&IPV6_ADDR_SCOPE_MASK
,
2087 if (IS_ERR_OR_NULL(ifp
)) {
2088 in6_dev_put(in6_dev
);
2092 update_lft
= create
= 1;
2093 ifp
->cstamp
= jiffies
;
2094 addrconf_dad_start(ifp
);
2100 #ifdef CONFIG_IPV6_PRIVACY
2101 struct inet6_ifaddr
*ift
;
2105 /* update lifetime (RFC2462 5.5.3 e) */
2106 spin_lock(&ifp
->lock
);
2108 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
2109 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
2112 if (!update_lft
&& stored_lft
) {
2113 if (valid_lft
> MIN_VALID_LIFETIME
||
2114 valid_lft
> stored_lft
)
2116 else if (stored_lft
<= MIN_VALID_LIFETIME
) {
2117 /* valid_lft <= stored_lft is always true */
2119 * RFC 4862 Section 5.5.3e:
2120 * "Note that the preferred lifetime of
2121 * the corresponding address is always
2122 * reset to the Preferred Lifetime in
2123 * the received Prefix Information
2124 * option, regardless of whether the
2125 * valid lifetime is also reset or
2128 * So if the preferred lifetime in
2129 * this advertisement is different
2130 * than what we have stored, but the
2131 * valid lifetime is invalid, just
2132 * reset prefered_lft.
2134 * We must set the valid lifetime
2135 * to the stored lifetime since we'll
2136 * be updating the timestamp below,
2137 * else we'll set it back to the
2140 if (prefered_lft
!= ifp
->prefered_lft
) {
2141 valid_lft
= stored_lft
;
2145 valid_lft
= MIN_VALID_LIFETIME
;
2146 if (valid_lft
< prefered_lft
)
2147 prefered_lft
= valid_lft
;
2153 ifp
->valid_lft
= valid_lft
;
2154 ifp
->prefered_lft
= prefered_lft
;
2157 ifp
->flags
&= ~IFA_F_DEPRECATED
;
2158 spin_unlock(&ifp
->lock
);
2160 if (!(flags
&IFA_F_TENTATIVE
))
2161 ipv6_ifa_notify(0, ifp
);
2163 spin_unlock(&ifp
->lock
);
2165 #ifdef CONFIG_IPV6_PRIVACY
2166 read_lock_bh(&in6_dev
->lock
);
2167 /* update all temporary addresses in the list */
2168 list_for_each_entry(ift
, &in6_dev
->tempaddr_list
,
2170 int age
, max_valid
, max_prefered
;
2172 if (ifp
!= ift
->ifpub
)
2176 * RFC 4941 section 3.3:
2177 * If a received option will extend the lifetime
2178 * of a public address, the lifetimes of
2179 * temporary addresses should be extended,
2180 * subject to the overall constraint that no
2181 * temporary addresses should ever remain
2182 * "valid" or "preferred" for a time longer than
2183 * (TEMP_VALID_LIFETIME) or
2184 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR),
2187 age
= (now
- ift
->cstamp
) / HZ
;
2188 max_valid
= in6_dev
->cnf
.temp_valid_lft
- age
;
2192 max_prefered
= in6_dev
->cnf
.temp_prefered_lft
-
2193 in6_dev
->cnf
.max_desync_factor
-
2195 if (max_prefered
< 0)
2198 if (valid_lft
> max_valid
)
2199 valid_lft
= max_valid
;
2201 if (prefered_lft
> max_prefered
)
2202 prefered_lft
= max_prefered
;
2204 spin_lock(&ift
->lock
);
2206 ift
->valid_lft
= valid_lft
;
2207 ift
->prefered_lft
= prefered_lft
;
2209 if (prefered_lft
> 0)
2210 ift
->flags
&= ~IFA_F_DEPRECATED
;
2212 spin_unlock(&ift
->lock
);
2213 if (!(flags
&IFA_F_TENTATIVE
))
2214 ipv6_ifa_notify(0, ift
);
2217 if ((create
|| list_empty(&in6_dev
->tempaddr_list
)) && in6_dev
->cnf
.use_tempaddr
> 0) {
2219 * When a new public address is created as
2220 * described in [ADDRCONF], also create a new
2221 * temporary address. Also create a temporary
2222 * address if it's enabled but no temporary
2223 * address currently exists.
2225 read_unlock_bh(&in6_dev
->lock
);
2226 ipv6_create_tempaddr(ifp
, NULL
);
2228 read_unlock_bh(&in6_dev
->lock
);
2235 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
2236 in6_dev_put(in6_dev
);
2240 * Set destination address.
2241 * Special case for SIT interfaces where we create a new "virtual"
2244 int addrconf_set_dstaddr(struct net
*net
, void __user
*arg
)
2246 struct in6_ifreq ireq
;
2247 struct net_device
*dev
;
2253 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2256 dev
= __dev_get_by_index(net
, ireq
.ifr6_ifindex
);
2262 #if IS_ENABLED(CONFIG_IPV6_SIT)
2263 if (dev
->type
== ARPHRD_SIT
) {
2264 const struct net_device_ops
*ops
= dev
->netdev_ops
;
2266 struct ip_tunnel_parm p
;
2268 err
= -EADDRNOTAVAIL
;
2269 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
2272 memset(&p
, 0, sizeof(p
));
2273 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
2277 p
.iph
.protocol
= IPPROTO_IPV6
;
2279 ifr
.ifr_ifru
.ifru_data
= (__force
void __user
*)&p
;
2281 if (ops
->ndo_do_ioctl
) {
2282 mm_segment_t oldfs
= get_fs();
2285 err
= ops
->ndo_do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
2292 dev
= __dev_get_by_name(net
, p
.name
);
2295 err
= dev_open(dev
);
2306 * Manual configuration of address on an interface
2308 static int inet6_addr_add(struct net
*net
, int ifindex
, const struct in6_addr
*pfx
,
2309 unsigned int plen
, __u8 ifa_flags
, __u32 prefered_lft
,
2312 struct inet6_ifaddr
*ifp
;
2313 struct inet6_dev
*idev
;
2314 struct net_device
*dev
;
2318 unsigned long timeout
;
2325 /* check the lifetime */
2326 if (!valid_lft
|| prefered_lft
> valid_lft
)
2329 dev
= __dev_get_by_index(net
, ifindex
);
2333 idev
= addrconf_add_dev(dev
);
2335 return PTR_ERR(idev
);
2337 scope
= ipv6_addr_scope(pfx
);
2339 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
2340 if (addrconf_finite_timeout(timeout
)) {
2341 expires
= jiffies_to_clock_t(timeout
* HZ
);
2342 valid_lft
= timeout
;
2343 flags
= RTF_EXPIRES
;
2347 ifa_flags
|= IFA_F_PERMANENT
;
2350 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
2351 if (addrconf_finite_timeout(timeout
)) {
2353 ifa_flags
|= IFA_F_DEPRECATED
;
2354 prefered_lft
= timeout
;
2357 ifp
= ipv6_add_addr(idev
, pfx
, plen
, scope
, ifa_flags
);
2360 spin_lock_bh(&ifp
->lock
);
2361 ifp
->valid_lft
= valid_lft
;
2362 ifp
->prefered_lft
= prefered_lft
;
2363 ifp
->tstamp
= jiffies
;
2364 spin_unlock_bh(&ifp
->lock
);
2366 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
2369 * Note that section 3.1 of RFC 4429 indicates
2370 * that the Optimistic flag should not be set for
2371 * manually configured addresses
2373 addrconf_dad_start(ifp
);
2379 return PTR_ERR(ifp
);
2382 static int inet6_addr_del(struct net
*net
, int ifindex
, const struct in6_addr
*pfx
,
2385 struct inet6_ifaddr
*ifp
;
2386 struct inet6_dev
*idev
;
2387 struct net_device
*dev
;
2392 dev
= __dev_get_by_index(net
, ifindex
);
2396 if ((idev
= __in6_dev_get(dev
)) == NULL
)
2399 read_lock_bh(&idev
->lock
);
2400 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
2401 if (ifp
->prefix_len
== plen
&&
2402 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
2404 read_unlock_bh(&idev
->lock
);
2408 /* If the last address is deleted administratively,
2409 disable IPv6 on this interface.
2411 if (list_empty(&idev
->addr_list
))
2412 addrconf_ifdown(idev
->dev
, 1);
2416 read_unlock_bh(&idev
->lock
);
2417 return -EADDRNOTAVAIL
;
2421 int addrconf_add_ifaddr(struct net
*net
, void __user
*arg
)
2423 struct in6_ifreq ireq
;
2426 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
2429 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2433 err
= inet6_addr_add(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2434 ireq
.ifr6_prefixlen
, IFA_F_PERMANENT
,
2435 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2440 int addrconf_del_ifaddr(struct net
*net
, void __user
*arg
)
2442 struct in6_ifreq ireq
;
2445 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
2448 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2452 err
= inet6_addr_del(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
,
2453 ireq
.ifr6_prefixlen
);
2458 static void add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
2459 int plen
, int scope
)
2461 struct inet6_ifaddr
*ifp
;
2463 ifp
= ipv6_add_addr(idev
, addr
, plen
, scope
, IFA_F_PERMANENT
);
2465 spin_lock_bh(&ifp
->lock
);
2466 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2467 spin_unlock_bh(&ifp
->lock
);
2468 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2473 #if IS_ENABLED(CONFIG_IPV6_SIT)
2474 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
2476 struct in6_addr addr
;
2477 struct net_device
*dev
;
2478 struct net
*net
= dev_net(idev
->dev
);
2483 memset(&addr
, 0, sizeof(struct in6_addr
));
2484 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
2486 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
2487 addr
.s6_addr32
[0] = htonl(0xfe800000);
2490 scope
= IPV6_ADDR_COMPATv4
;
2493 if (addr
.s6_addr32
[3]) {
2494 add_addr(idev
, &addr
, 128, scope
);
2498 for_each_netdev(net
, dev
) {
2499 struct in_device
*in_dev
= __in_dev_get_rtnl(dev
);
2500 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
2501 struct in_ifaddr
*ifa
;
2505 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
2508 addr
.s6_addr32
[3] = ifa
->ifa_local
;
2510 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
2512 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
2513 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2517 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2522 add_addr(idev
, &addr
, plen
, flag
);
2529 static void init_loopback(struct net_device
*dev
)
2531 struct inet6_dev
*idev
;
2532 struct net_device
*sp_dev
;
2533 struct inet6_ifaddr
*sp_ifa
;
2534 struct rt6_info
*sp_rt
;
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
);
2547 /* Add routes to other interface's IPv6 addresses */
2548 for_each_netdev(dev_net(dev
), sp_dev
) {
2549 if (!strcmp(sp_dev
->name
, dev
->name
))
2552 idev
= __in6_dev_get(sp_dev
);
2556 read_lock_bh(&idev
->lock
);
2557 list_for_each_entry(sp_ifa
, &idev
->addr_list
, if_list
) {
2559 if (sp_ifa
->flags
& (IFA_F_DADFAILED
| IFA_F_TENTATIVE
))
2562 sp_rt
= addrconf_dst_alloc(idev
, &sp_ifa
->addr
, 0);
2564 /* Failure cases are ignored */
2568 read_unlock_bh(&idev
->lock
);
2572 static void addrconf_add_linklocal(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
2574 struct inet6_ifaddr
*ifp
;
2575 u32 addr_flags
= IFA_F_PERMANENT
;
2577 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2578 if (idev
->cnf
.optimistic_dad
&&
2579 !dev_net(idev
->dev
)->ipv6
.devconf_all
->forwarding
)
2580 addr_flags
|= IFA_F_OPTIMISTIC
;
2584 ifp
= ipv6_add_addr(idev
, addr
, 64, IFA_LINK
, addr_flags
);
2586 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
2587 addrconf_dad_start(ifp
);
2592 static void addrconf_dev_config(struct net_device
*dev
)
2594 struct in6_addr addr
;
2595 struct inet6_dev
*idev
;
2599 if ((dev
->type
!= ARPHRD_ETHER
) &&
2600 (dev
->type
!= ARPHRD_FDDI
) &&
2601 (dev
->type
!= ARPHRD_ARCNET
) &&
2602 (dev
->type
!= ARPHRD_INFINIBAND
) &&
2603 (dev
->type
!= ARPHRD_IEEE802154
)) {
2604 /* Alas, we support only Ethernet autoconfiguration. */
2608 idev
= addrconf_add_dev(dev
);
2612 memset(&addr
, 0, sizeof(struct in6_addr
));
2613 addr
.s6_addr32
[0] = htonl(0xFE800000);
2615 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) == 0)
2616 addrconf_add_linklocal(idev
, &addr
);
2619 #if IS_ENABLED(CONFIG_IPV6_SIT)
2620 static void addrconf_sit_config(struct net_device
*dev
)
2622 struct inet6_dev
*idev
;
2627 * Configure the tunnel with one of our IPv4
2628 * addresses... we should configure all of
2629 * our v4 addrs in the tunnel
2632 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2633 pr_debug("%s: add_dev failed\n", __func__
);
2637 if (dev
->priv_flags
& IFF_ISATAP
) {
2638 struct in6_addr addr
;
2640 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2641 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
2642 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
))
2643 addrconf_add_linklocal(idev
, &addr
);
2647 sit_add_v4_addrs(idev
);
2649 if (dev
->flags
&IFF_POINTOPOINT
)
2650 addrconf_add_mroute(dev
);
2656 #if IS_ENABLED(CONFIG_NET_IPGRE)
2657 static void addrconf_gre_config(struct net_device
*dev
)
2659 struct inet6_dev
*idev
;
2660 struct in6_addr addr
;
2662 pr_info("%s(%s)\n", __func__
, dev
->name
);
2666 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2667 pr_debug("%s: add_dev failed\n", __func__
);
2671 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2672 addrconf_prefix_route(&addr
, 64, dev
, 0, 0);
2674 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
))
2675 addrconf_add_linklocal(idev
, &addr
);
2680 ipv6_inherit_linklocal(struct inet6_dev
*idev
, struct net_device
*link_dev
)
2682 struct in6_addr lladdr
;
2684 if (!ipv6_get_lladdr(link_dev
, &lladdr
, IFA_F_TENTATIVE
)) {
2685 addrconf_add_linklocal(idev
, &lladdr
);
2691 static void ip6_tnl_add_linklocal(struct inet6_dev
*idev
)
2693 struct net_device
*link_dev
;
2694 struct net
*net
= dev_net(idev
->dev
);
2696 /* first try to inherit the link-local address from the link device */
2697 if (idev
->dev
->iflink
&&
2698 (link_dev
= __dev_get_by_index(net
, idev
->dev
->iflink
))) {
2699 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2702 /* then try to inherit it from any device */
2703 for_each_netdev(net
, link_dev
) {
2704 if (!ipv6_inherit_linklocal(idev
, link_dev
))
2707 pr_debug("init ip6-ip6: add_linklocal failed\n");
2711 * Autoconfigure tunnel with a link-local address so routing protocols,
2712 * DHCPv6, MLD etc. can be run over the virtual link
2715 static void addrconf_ip6_tnl_config(struct net_device
*dev
)
2717 struct inet6_dev
*idev
;
2721 idev
= addrconf_add_dev(dev
);
2723 pr_debug("init ip6-ip6: add_dev failed\n");
2726 ip6_tnl_add_linklocal(idev
);
2729 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
2732 struct net_device
*dev
= (struct net_device
*) data
;
2733 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2734 int run_pending
= 0;
2738 case NETDEV_REGISTER
:
2739 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2740 idev
= ipv6_add_dev(dev
);
2742 return notifier_from_errno(-ENOMEM
);
2748 if (dev
->flags
& IFF_SLAVE
)
2751 if (event
== NETDEV_UP
) {
2752 if (!addrconf_qdisc_ok(dev
)) {
2753 /* device is not ready yet. */
2754 pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n",
2759 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
)
2760 idev
= ipv6_add_dev(dev
);
2763 idev
->if_flags
|= IF_READY
;
2767 if (!addrconf_qdisc_ok(dev
)) {
2768 /* device is still not ready. */
2773 if (idev
->if_flags
& IF_READY
)
2774 /* device is already configured. */
2776 idev
->if_flags
|= IF_READY
;
2779 pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n",
2785 switch (dev
->type
) {
2786 #if IS_ENABLED(CONFIG_IPV6_SIT)
2788 addrconf_sit_config(dev
);
2791 #if IS_ENABLED(CONFIG_NET_IPGRE)
2793 addrconf_gre_config(dev
);
2796 case ARPHRD_TUNNEL6
:
2797 addrconf_ip6_tnl_config(dev
);
2799 case ARPHRD_LOOPBACK
:
2804 addrconf_dev_config(dev
);
2810 addrconf_dad_run(idev
);
2813 * If the MTU changed during the interface down,
2814 * when the interface up, the changed MTU must be
2815 * reflected in the idev as well as routers.
2817 if (idev
->cnf
.mtu6
!= dev
->mtu
&&
2818 dev
->mtu
>= IPV6_MIN_MTU
) {
2819 rt6_mtu_change(dev
, dev
->mtu
);
2820 idev
->cnf
.mtu6
= dev
->mtu
;
2822 idev
->tstamp
= jiffies
;
2823 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2826 * If the changed mtu during down is lower than
2827 * IPV6_MIN_MTU stop IPv6 on this interface.
2829 if (dev
->mtu
< IPV6_MIN_MTU
)
2830 addrconf_ifdown(dev
, 1);
2834 case NETDEV_CHANGEMTU
:
2835 if (idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2836 rt6_mtu_change(dev
, dev
->mtu
);
2837 idev
->cnf
.mtu6
= dev
->mtu
;
2841 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2842 idev
= ipv6_add_dev(dev
);
2848 * MTU falled under IPV6_MIN_MTU.
2849 * Stop IPv6 on this interface.
2853 case NETDEV_UNREGISTER
:
2855 * Remove all addresses from this interface.
2857 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2860 case NETDEV_CHANGENAME
:
2862 snmp6_unregister_dev(idev
);
2863 addrconf_sysctl_unregister(idev
);
2864 addrconf_sysctl_register(idev
);
2865 err
= snmp6_register_dev(idev
);
2867 return notifier_from_errno(err
);
2871 case NETDEV_PRE_TYPE_CHANGE
:
2872 case NETDEV_POST_TYPE_CHANGE
:
2873 addrconf_type_change(dev
, event
);
2881 * addrconf module should be notified of a device going up
2883 static struct notifier_block ipv6_dev_notf
= {
2884 .notifier_call
= addrconf_notify
,
2887 static void addrconf_type_change(struct net_device
*dev
, unsigned long event
)
2889 struct inet6_dev
*idev
;
2892 idev
= __in6_dev_get(dev
);
2894 if (event
== NETDEV_POST_TYPE_CHANGE
)
2895 ipv6_mc_remap(idev
);
2896 else if (event
== NETDEV_PRE_TYPE_CHANGE
)
2897 ipv6_mc_unmap(idev
);
2900 static int addrconf_ifdown(struct net_device
*dev
, int how
)
2902 struct net
*net
= dev_net(dev
);
2903 struct inet6_dev
*idev
;
2904 struct inet6_ifaddr
*ifa
;
2909 rt6_ifdown(net
, dev
);
2910 neigh_ifdown(&nd_tbl
, dev
);
2912 idev
= __in6_dev_get(dev
);
2917 * Step 1: remove reference to ipv6 device from parent device.
2923 /* protected by rtnl_lock */
2924 RCU_INIT_POINTER(dev
->ip6_ptr
, NULL
);
2926 /* Step 1.5: remove snmp6 entry */
2927 snmp6_unregister_dev(idev
);
2931 /* Step 2: clear hash table */
2932 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
2933 struct hlist_head
*h
= &inet6_addr_lst
[i
];
2935 spin_lock_bh(&addrconf_hash_lock
);
2937 hlist_for_each_entry_rcu(ifa
, h
, addr_lst
) {
2938 if (ifa
->idev
== idev
) {
2939 hlist_del_init_rcu(&ifa
->addr_lst
);
2940 addrconf_del_timer(ifa
);
2944 spin_unlock_bh(&addrconf_hash_lock
);
2947 write_lock_bh(&idev
->lock
);
2949 /* Step 2: clear flags for stateless addrconf */
2951 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
2953 #ifdef CONFIG_IPV6_PRIVACY
2954 if (how
&& del_timer(&idev
->regen_timer
))
2957 /* Step 3: clear tempaddr list */
2958 while (!list_empty(&idev
->tempaddr_list
)) {
2959 ifa
= list_first_entry(&idev
->tempaddr_list
,
2960 struct inet6_ifaddr
, tmp_list
);
2961 list_del(&ifa
->tmp_list
);
2962 write_unlock_bh(&idev
->lock
);
2963 spin_lock_bh(&ifa
->lock
);
2966 in6_ifa_put(ifa
->ifpub
);
2969 spin_unlock_bh(&ifa
->lock
);
2971 write_lock_bh(&idev
->lock
);
2975 while (!list_empty(&idev
->addr_list
)) {
2976 ifa
= list_first_entry(&idev
->addr_list
,
2977 struct inet6_ifaddr
, if_list
);
2978 addrconf_del_timer(ifa
);
2980 list_del(&ifa
->if_list
);
2982 write_unlock_bh(&idev
->lock
);
2984 spin_lock_bh(&ifa
->state_lock
);
2986 ifa
->state
= INET6_IFADDR_STATE_DEAD
;
2987 spin_unlock_bh(&ifa
->state_lock
);
2989 if (state
!= INET6_IFADDR_STATE_DEAD
) {
2990 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
2991 atomic_notifier_call_chain(&inet6addr_chain
, NETDEV_DOWN
, ifa
);
2995 write_lock_bh(&idev
->lock
);
2998 write_unlock_bh(&idev
->lock
);
3000 /* Step 5: Discard multicast list */
3002 ipv6_mc_destroy_dev(idev
);
3006 idev
->tstamp
= jiffies
;
3008 /* Last: Shot the device (if unregistered) */
3010 addrconf_sysctl_unregister(idev
);
3011 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
3012 neigh_ifdown(&nd_tbl
, dev
);
3018 static void addrconf_rs_timer(unsigned long data
)
3020 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
3021 struct inet6_dev
*idev
= ifp
->idev
;
3023 read_lock(&idev
->lock
);
3024 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
))
3027 if (!ipv6_accept_ra(idev
))
3030 /* Announcement received after solicitation was sent */
3031 if (idev
->if_flags
& IF_RA_RCVD
)
3034 spin_lock(&ifp
->lock
);
3035 if (ifp
->probes
++ < idev
->cnf
.rtr_solicits
) {
3036 /* The wait after the last probe can be shorter */
3037 addrconf_mod_timer(ifp
, AC_RS
,
3038 (ifp
->probes
== idev
->cnf
.rtr_solicits
) ?
3039 idev
->cnf
.rtr_solicit_delay
:
3040 idev
->cnf
.rtr_solicit_interval
);
3041 spin_unlock(&ifp
->lock
);
3043 ndisc_send_rs(idev
->dev
, &ifp
->addr
, &in6addr_linklocal_allrouters
);
3045 spin_unlock(&ifp
->lock
);
3047 * Note: we do not support deprecated "all on-link"
3048 * assumption any longer.
3050 pr_debug("%s: no IPv6 routers present\n", idev
->dev
->name
);
3054 read_unlock(&idev
->lock
);
3059 * Duplicate Address Detection
3061 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
3063 unsigned long rand_num
;
3064 struct inet6_dev
*idev
= ifp
->idev
;
3066 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
3069 rand_num
= net_random() % (idev
->cnf
.rtr_solicit_delay
? : 1);
3071 ifp
->probes
= idev
->cnf
.dad_transmits
;
3072 addrconf_mod_timer(ifp
, AC_DAD
, rand_num
);
3075 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
)
3077 struct inet6_dev
*idev
= ifp
->idev
;
3078 struct net_device
*dev
= idev
->dev
;
3080 addrconf_join_solict(dev
, &ifp
->addr
);
3082 net_srandom(ifp
->addr
.s6_addr32
[3]);
3084 read_lock_bh(&idev
->lock
);
3085 spin_lock(&ifp
->lock
);
3086 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
)
3089 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
3090 idev
->cnf
.accept_dad
< 1 ||
3091 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
3092 ifp
->flags
& IFA_F_NODAD
) {
3093 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
3094 spin_unlock(&ifp
->lock
);
3095 read_unlock_bh(&idev
->lock
);
3097 addrconf_dad_completed(ifp
);
3101 if (!(idev
->if_flags
& IF_READY
)) {
3102 spin_unlock(&ifp
->lock
);
3103 read_unlock_bh(&idev
->lock
);
3105 * If the device is not ready:
3106 * - keep it tentative if it is a permanent address.
3107 * - otherwise, kill it.
3110 addrconf_dad_stop(ifp
, 0);
3115 * Optimistic nodes can start receiving
3118 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
3119 ip6_ins_rt(ifp
->rt
);
3121 addrconf_dad_kick(ifp
);
3123 spin_unlock(&ifp
->lock
);
3124 read_unlock_bh(&idev
->lock
);
3127 static void addrconf_dad_timer(unsigned long data
)
3129 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*) data
;
3130 struct inet6_dev
*idev
= ifp
->idev
;
3131 struct in6_addr mcaddr
;
3133 if (!ifp
->probes
&& addrconf_dad_end(ifp
))
3136 read_lock(&idev
->lock
);
3137 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
)) {
3138 read_unlock(&idev
->lock
);
3142 spin_lock(&ifp
->lock
);
3143 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
) {
3144 spin_unlock(&ifp
->lock
);
3145 read_unlock(&idev
->lock
);
3149 if (ifp
->probes
== 0) {
3151 * DAD was successful
3154 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
3155 spin_unlock(&ifp
->lock
);
3156 read_unlock(&idev
->lock
);
3158 addrconf_dad_completed(ifp
);
3164 addrconf_mod_timer(ifp
, AC_DAD
, ifp
->idev
->nd_parms
->retrans_time
);
3165 spin_unlock(&ifp
->lock
);
3166 read_unlock(&idev
->lock
);
3168 /* send a neighbour solicitation for our addr */
3169 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
3170 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &in6addr_any
);
3175 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
3177 struct net_device
*dev
= ifp
->idev
->dev
;
3180 * Configure the address for reception. Now it is valid.
3183 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
3185 /* If added prefix is link local and we are prepared to process
3186 router advertisements, start sending router solicitations.
3189 if (ipv6_accept_ra(ifp
->idev
) &&
3190 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
3191 (dev
->flags
&IFF_LOOPBACK
) == 0 &&
3192 (ipv6_addr_type(&ifp
->addr
) & IPV6_ADDR_LINKLOCAL
)) {
3194 * If a host as already performed a random delay
3195 * [...] as part of DAD [...] there is no need
3196 * to delay again before sending the first RS
3198 ndisc_send_rs(ifp
->idev
->dev
, &ifp
->addr
, &in6addr_linklocal_allrouters
);
3200 spin_lock_bh(&ifp
->lock
);
3202 ifp
->idev
->if_flags
|= IF_RS_SENT
;
3203 addrconf_mod_timer(ifp
, AC_RS
, ifp
->idev
->cnf
.rtr_solicit_interval
);
3204 spin_unlock_bh(&ifp
->lock
);
3208 static void addrconf_dad_run(struct inet6_dev
*idev
)
3210 struct inet6_ifaddr
*ifp
;
3212 read_lock_bh(&idev
->lock
);
3213 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
3214 spin_lock(&ifp
->lock
);
3215 if (ifp
->flags
& IFA_F_TENTATIVE
&&
3216 ifp
->state
== INET6_IFADDR_STATE_DAD
)
3217 addrconf_dad_kick(ifp
);
3218 spin_unlock(&ifp
->lock
);
3220 read_unlock_bh(&idev
->lock
);
3223 #ifdef CONFIG_PROC_FS
3224 struct if6_iter_state
{
3225 struct seq_net_private p
;
3230 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
, loff_t pos
)
3232 struct inet6_ifaddr
*ifa
= NULL
;
3233 struct if6_iter_state
*state
= seq
->private;
3234 struct net
*net
= seq_file_net(seq
);
3237 /* initial bucket if pos is 0 */
3243 for (; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
3244 hlist_for_each_entry_rcu_bh(ifa
, &inet6_addr_lst
[state
->bucket
],
3246 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
3248 /* sync with offset */
3249 if (p
< state
->offset
) {
3257 /* prepare for next bucket */
3264 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
,
3265 struct inet6_ifaddr
*ifa
)
3267 struct if6_iter_state
*state
= seq
->private;
3268 struct net
*net
= seq_file_net(seq
);
3270 hlist_for_each_entry_continue_rcu_bh(ifa
, addr_lst
) {
3271 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
3277 while (++state
->bucket
< IN6_ADDR_HSIZE
) {
3279 hlist_for_each_entry_rcu_bh(ifa
,
3280 &inet6_addr_lst
[state
->bucket
], addr_lst
) {
3281 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
3291 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
3295 return if6_get_first(seq
, *pos
);
3298 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
3300 struct inet6_ifaddr
*ifa
;
3302 ifa
= if6_get_next(seq
, v
);
3307 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
3310 rcu_read_unlock_bh();
3313 static int if6_seq_show(struct seq_file
*seq
, void *v
)
3315 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
3316 seq_printf(seq
, "%pi6 %02x %02x %02x %02x %8s\n",
3318 ifp
->idev
->dev
->ifindex
,
3322 ifp
->idev
->dev
->name
);
3326 static const struct seq_operations if6_seq_ops
= {
3327 .start
= if6_seq_start
,
3328 .next
= if6_seq_next
,
3329 .show
= if6_seq_show
,
3330 .stop
= if6_seq_stop
,
3333 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
3335 return seq_open_net(inode
, file
, &if6_seq_ops
,
3336 sizeof(struct if6_iter_state
));
3339 static const struct file_operations if6_fops
= {
3340 .owner
= THIS_MODULE
,
3341 .open
= if6_seq_open
,
3343 .llseek
= seq_lseek
,
3344 .release
= seq_release_net
,
3347 static int __net_init
if6_proc_net_init(struct net
*net
)
3349 if (!proc_create("if_inet6", S_IRUGO
, net
->proc_net
, &if6_fops
))
3354 static void __net_exit
if6_proc_net_exit(struct net
*net
)
3356 remove_proc_entry("if_inet6", net
->proc_net
);
3359 static struct pernet_operations if6_proc_net_ops
= {
3360 .init
= if6_proc_net_init
,
3361 .exit
= if6_proc_net_exit
,
3364 int __init
if6_proc_init(void)
3366 return register_pernet_subsys(&if6_proc_net_ops
);
3369 void if6_proc_exit(void)
3371 unregister_pernet_subsys(&if6_proc_net_ops
);
3373 #endif /* CONFIG_PROC_FS */
3375 #if IS_ENABLED(CONFIG_IPV6_MIP6)
3376 /* Check if address is a home address configured on any interface. */
3377 int ipv6_chk_home_addr(struct net
*net
, const struct in6_addr
*addr
)
3380 struct inet6_ifaddr
*ifp
= NULL
;
3381 unsigned int hash
= inet6_addr_hash(addr
);
3384 hlist_for_each_entry_rcu_bh(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
3385 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
3387 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
3388 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
3393 rcu_read_unlock_bh();
3399 * Periodic address status verification
3402 static void addrconf_verify(unsigned long foo
)
3404 unsigned long now
, next
, next_sec
, next_sched
;
3405 struct inet6_ifaddr
*ifp
;
3409 spin_lock(&addrconf_verify_lock
);
3411 next
= round_jiffies_up(now
+ ADDR_CHECK_FREQUENCY
);
3413 del_timer(&addr_chk_timer
);
3415 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
3417 hlist_for_each_entry_rcu_bh(ifp
,
3418 &inet6_addr_lst
[i
], addr_lst
) {
3421 if (ifp
->flags
& IFA_F_PERMANENT
)
3424 spin_lock(&ifp
->lock
);
3425 /* We try to batch several events at once. */
3426 age
= (now
- ifp
->tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
3428 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
3429 age
>= ifp
->valid_lft
) {
3430 spin_unlock(&ifp
->lock
);
3434 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
3435 spin_unlock(&ifp
->lock
);
3437 } else if (age
>= ifp
->prefered_lft
) {
3438 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
3441 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
3443 ifp
->flags
|= IFA_F_DEPRECATED
;
3446 if (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
))
3447 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
3449 spin_unlock(&ifp
->lock
);
3454 ipv6_ifa_notify(0, ifp
);
3458 #ifdef CONFIG_IPV6_PRIVACY
3459 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
3460 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
3461 unsigned long regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
3462 ifp
->idev
->cnf
.dad_transmits
*
3463 ifp
->idev
->nd_parms
->retrans_time
/ HZ
;
3465 if (age
>= ifp
->prefered_lft
- regen_advance
) {
3466 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
3467 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3468 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3469 if (!ifp
->regen_count
&& ifpub
) {
3472 in6_ifa_hold(ifpub
);
3473 spin_unlock(&ifp
->lock
);
3475 spin_lock(&ifpub
->lock
);
3476 ifpub
->regen_count
= 0;
3477 spin_unlock(&ifpub
->lock
);
3478 ipv6_create_tempaddr(ifpub
, ifp
);
3483 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
3484 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
3485 spin_unlock(&ifp
->lock
);
3488 /* ifp->prefered_lft <= ifp->valid_lft */
3489 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3490 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3491 spin_unlock(&ifp
->lock
);
3496 next_sec
= round_jiffies_up(next
);
3499 /* If rounded timeout is accurate enough, accept it. */
3500 if (time_before(next_sec
, next
+ ADDRCONF_TIMER_FUZZ
))
3501 next_sched
= next_sec
;
3503 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
3504 if (time_before(next_sched
, jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
))
3505 next_sched
= jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
;
3507 ADBG((KERN_DEBUG
"now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
3508 now
, next
, next_sec
, next_sched
));
3510 addr_chk_timer
.expires
= next_sched
;
3511 add_timer(&addr_chk_timer
);
3512 spin_unlock(&addrconf_verify_lock
);
3513 rcu_read_unlock_bh();
3516 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
)
3518 struct in6_addr
*pfx
= NULL
;
3521 pfx
= nla_data(addr
);
3524 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
3527 pfx
= nla_data(local
);
3533 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
3534 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
3535 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
3536 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
3540 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3542 struct net
*net
= sock_net(skb
->sk
);
3543 struct ifaddrmsg
*ifm
;
3544 struct nlattr
*tb
[IFA_MAX
+1];
3545 struct in6_addr
*pfx
;
3548 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3552 ifm
= nlmsg_data(nlh
);
3553 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3557 return inet6_addr_del(net
, ifm
->ifa_index
, pfx
, ifm
->ifa_prefixlen
);
3560 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u8 ifa_flags
,
3561 u32 prefered_lft
, u32 valid_lft
)
3565 unsigned long timeout
;
3567 if (!valid_lft
|| (prefered_lft
> valid_lft
))
3570 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
3571 if (addrconf_finite_timeout(timeout
)) {
3572 expires
= jiffies_to_clock_t(timeout
* HZ
);
3573 valid_lft
= timeout
;
3574 flags
= RTF_EXPIRES
;
3578 ifa_flags
|= IFA_F_PERMANENT
;
3581 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
3582 if (addrconf_finite_timeout(timeout
)) {
3584 ifa_flags
|= IFA_F_DEPRECATED
;
3585 prefered_lft
= timeout
;
3588 spin_lock_bh(&ifp
->lock
);
3589 ifp
->flags
= (ifp
->flags
& ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
| IFA_F_HOMEADDRESS
)) | ifa_flags
;
3590 ifp
->tstamp
= jiffies
;
3591 ifp
->valid_lft
= valid_lft
;
3592 ifp
->prefered_lft
= prefered_lft
;
3594 spin_unlock_bh(&ifp
->lock
);
3595 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
3596 ipv6_ifa_notify(0, ifp
);
3598 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
3606 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
, void *arg
)
3608 struct net
*net
= sock_net(skb
->sk
);
3609 struct ifaddrmsg
*ifm
;
3610 struct nlattr
*tb
[IFA_MAX
+1];
3611 struct in6_addr
*pfx
;
3612 struct inet6_ifaddr
*ifa
;
3613 struct net_device
*dev
;
3614 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
3618 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3622 ifm
= nlmsg_data(nlh
);
3623 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3627 if (tb
[IFA_CACHEINFO
]) {
3628 struct ifa_cacheinfo
*ci
;
3630 ci
= nla_data(tb
[IFA_CACHEINFO
]);
3631 valid_lft
= ci
->ifa_valid
;
3632 preferred_lft
= ci
->ifa_prefered
;
3634 preferred_lft
= INFINITY_LIFE_TIME
;
3635 valid_lft
= INFINITY_LIFE_TIME
;
3638 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3642 /* We ignore other flags so far. */
3643 ifa_flags
= ifm
->ifa_flags
& (IFA_F_NODAD
| IFA_F_HOMEADDRESS
);
3645 ifa
= ipv6_get_ifaddr(net
, pfx
, dev
, 1);
3648 * It would be best to check for !NLM_F_CREATE here but
3649 * userspace alreay relies on not having to provide this.
3651 return inet6_addr_add(net
, ifm
->ifa_index
, pfx
,
3652 ifm
->ifa_prefixlen
, ifa_flags
,
3653 preferred_lft
, valid_lft
);
3656 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
3657 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
3660 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
3667 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u8 flags
,
3668 u8 scope
, int ifindex
)
3670 struct ifaddrmsg
*ifm
;
3672 ifm
= nlmsg_data(nlh
);
3673 ifm
->ifa_family
= AF_INET6
;
3674 ifm
->ifa_prefixlen
= prefixlen
;
3675 ifm
->ifa_flags
= flags
;
3676 ifm
->ifa_scope
= scope
;
3677 ifm
->ifa_index
= ifindex
;
3680 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
3681 unsigned long tstamp
, u32 preferred
, u32 valid
)
3683 struct ifa_cacheinfo ci
;
3685 ci
.cstamp
= cstamp_delta(cstamp
);
3686 ci
.tstamp
= cstamp_delta(tstamp
);
3687 ci
.ifa_prefered
= preferred
;
3688 ci
.ifa_valid
= valid
;
3690 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
3693 static inline int rt_scope(int ifa_scope
)
3695 if (ifa_scope
& IFA_HOST
)
3696 return RT_SCOPE_HOST
;
3697 else if (ifa_scope
& IFA_LINK
)
3698 return RT_SCOPE_LINK
;
3699 else if (ifa_scope
& IFA_SITE
)
3700 return RT_SCOPE_SITE
;
3702 return RT_SCOPE_UNIVERSE
;
3705 static inline int inet6_ifaddr_msgsize(void)
3707 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
3708 + nla_total_size(16) /* IFA_ADDRESS */
3709 + nla_total_size(sizeof(struct ifa_cacheinfo
));
3712 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
3713 u32 portid
, u32 seq
, int event
, unsigned int flags
)
3715 struct nlmsghdr
*nlh
;
3716 u32 preferred
, valid
;
3718 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3722 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
3723 ifa
->idev
->dev
->ifindex
);
3725 if (!(ifa
->flags
&IFA_F_PERMANENT
)) {
3726 preferred
= ifa
->prefered_lft
;
3727 valid
= ifa
->valid_lft
;
3728 if (preferred
!= INFINITY_LIFE_TIME
) {
3729 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
3730 if (preferred
> tval
)
3734 if (valid
!= INFINITY_LIFE_TIME
) {
3742 preferred
= INFINITY_LIFE_TIME
;
3743 valid
= INFINITY_LIFE_TIME
;
3746 if (nla_put(skb
, IFA_ADDRESS
, 16, &ifa
->addr
) < 0 ||
3747 put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0) {
3748 nlmsg_cancel(skb
, nlh
);
3752 return nlmsg_end(skb
, nlh
);
3755 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
3756 u32 portid
, u32 seq
, int event
, u16 flags
)
3758 struct nlmsghdr
*nlh
;
3759 u8 scope
= RT_SCOPE_UNIVERSE
;
3760 int ifindex
= ifmca
->idev
->dev
->ifindex
;
3762 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
3763 scope
= RT_SCOPE_SITE
;
3765 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3769 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3770 if (nla_put(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
) < 0 ||
3771 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
3772 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3773 nlmsg_cancel(skb
, nlh
);
3777 return nlmsg_end(skb
, nlh
);
3780 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
3781 u32 portid
, u32 seq
, int event
, unsigned int flags
)
3783 struct nlmsghdr
*nlh
;
3784 u8 scope
= RT_SCOPE_UNIVERSE
;
3785 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
3787 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
3788 scope
= RT_SCOPE_SITE
;
3790 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3794 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
3795 if (nla_put(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
) < 0 ||
3796 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
3797 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
3798 nlmsg_cancel(skb
, nlh
);
3802 return nlmsg_end(skb
, nlh
);
3811 /* called with rcu_read_lock() */
3812 static int in6_dump_addrs(struct inet6_dev
*idev
, struct sk_buff
*skb
,
3813 struct netlink_callback
*cb
, enum addr_type_t type
,
3814 int s_ip_idx
, int *p_ip_idx
)
3816 struct ifmcaddr6
*ifmca
;
3817 struct ifacaddr6
*ifaca
;
3819 int ip_idx
= *p_ip_idx
;
3821 read_lock_bh(&idev
->lock
);
3823 case UNICAST_ADDR
: {
3824 struct inet6_ifaddr
*ifa
;
3826 /* unicast address incl. temp addr */
3827 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
3828 if (++ip_idx
< s_ip_idx
)
3830 err
= inet6_fill_ifaddr(skb
, ifa
,
3831 NETLINK_CB(cb
->skb
).portid
,
3840 case MULTICAST_ADDR
:
3841 /* multicast address */
3842 for (ifmca
= idev
->mc_list
; ifmca
;
3843 ifmca
= ifmca
->next
, ip_idx
++) {
3844 if (ip_idx
< s_ip_idx
)
3846 err
= inet6_fill_ifmcaddr(skb
, ifmca
,
3847 NETLINK_CB(cb
->skb
).portid
,
3856 /* anycast address */
3857 for (ifaca
= idev
->ac_list
; ifaca
;
3858 ifaca
= ifaca
->aca_next
, ip_idx
++) {
3859 if (ip_idx
< s_ip_idx
)
3861 err
= inet6_fill_ifacaddr(skb
, ifaca
,
3862 NETLINK_CB(cb
->skb
).portid
,
3873 read_unlock_bh(&idev
->lock
);
3878 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
3879 enum addr_type_t type
)
3881 struct net
*net
= sock_net(skb
->sk
);
3884 int s_idx
, s_ip_idx
;
3885 struct net_device
*dev
;
3886 struct inet6_dev
*idev
;
3887 struct hlist_head
*head
;
3890 s_idx
= idx
= cb
->args
[1];
3891 s_ip_idx
= ip_idx
= cb
->args
[2];
3894 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
3896 head
= &net
->dev_index_head
[h
];
3897 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
3900 if (h
> s_h
|| idx
> s_idx
)
3903 idev
= __in6_dev_get(dev
);
3907 if (in6_dump_addrs(idev
, skb
, cb
, type
,
3908 s_ip_idx
, &ip_idx
) <= 0)
3918 cb
->args
[2] = ip_idx
;
3923 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3925 enum addr_type_t type
= UNICAST_ADDR
;
3927 return inet6_dump_addr(skb
, cb
, type
);
3930 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3932 enum addr_type_t type
= MULTICAST_ADDR
;
3934 return inet6_dump_addr(skb
, cb
, type
);
3938 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
3940 enum addr_type_t type
= ANYCAST_ADDR
;
3942 return inet6_dump_addr(skb
, cb
, type
);
3945 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
*nlh
,
3948 struct net
*net
= sock_net(in_skb
->sk
);
3949 struct ifaddrmsg
*ifm
;
3950 struct nlattr
*tb
[IFA_MAX
+1];
3951 struct in6_addr
*addr
= NULL
;
3952 struct net_device
*dev
= NULL
;
3953 struct inet6_ifaddr
*ifa
;
3954 struct sk_buff
*skb
;
3957 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3961 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
]);
3967 ifm
= nlmsg_data(nlh
);
3969 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3971 ifa
= ipv6_get_ifaddr(net
, addr
, dev
, 1);
3973 err
= -EADDRNOTAVAIL
;
3977 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
);
3983 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).portid
,
3984 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
3986 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
3987 WARN_ON(err
== -EMSGSIZE
);
3991 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).portid
);
3998 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
4000 struct sk_buff
*skb
;
4001 struct net
*net
= dev_net(ifa
->idev
->dev
);
4004 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
4008 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
4010 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4011 WARN_ON(err
== -EMSGSIZE
);
4015 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
4019 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
4022 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
4023 __s32
*array
, int bytes
)
4025 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
4027 memset(array
, 0, bytes
);
4028 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
4029 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
4030 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
4031 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
4032 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
4033 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
4034 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
4035 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
4036 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] =
4037 jiffies_to_msecs(cnf
->rtr_solicit_interval
);
4038 array
[DEVCONF_RTR_SOLICIT_DELAY
] =
4039 jiffies_to_msecs(cnf
->rtr_solicit_delay
);
4040 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
4041 #ifdef CONFIG_IPV6_PRIVACY
4042 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
4043 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
4044 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
4045 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
4046 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
4048 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
4049 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
4050 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
4051 #ifdef CONFIG_IPV6_ROUTER_PREF
4052 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
4053 array
[DEVCONF_RTR_PROBE_INTERVAL
] =
4054 jiffies_to_msecs(cnf
->rtr_probe_interval
);
4055 #ifdef CONFIG_IPV6_ROUTE_INFO
4056 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
4059 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
4060 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
4061 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4062 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
4064 #ifdef CONFIG_IPV6_MROUTE
4065 array
[DEVCONF_MC_FORWARDING
] = cnf
->mc_forwarding
;
4067 array
[DEVCONF_DISABLE_IPV6
] = cnf
->disable_ipv6
;
4068 array
[DEVCONF_ACCEPT_DAD
] = cnf
->accept_dad
;
4069 array
[DEVCONF_FORCE_TLLAO
] = cnf
->force_tllao
;
4070 array
[DEVCONF_NDISC_NOTIFY
] = cnf
->ndisc_notify
;
4073 static inline size_t inet6_ifla6_size(void)
4075 return nla_total_size(4) /* IFLA_INET6_FLAGS */
4076 + nla_total_size(sizeof(struct ifla_cacheinfo
))
4077 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
4078 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
4079 + nla_total_size(ICMP6_MIB_MAX
* 8); /* IFLA_INET6_ICMP6STATS */
4082 static inline size_t inet6_if_nlmsg_size(void)
4084 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
4085 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
4086 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
4087 + nla_total_size(4) /* IFLA_MTU */
4088 + nla_total_size(4) /* IFLA_LINK */
4089 + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
4092 static inline void __snmp6_fill_statsdev(u64
*stats
, atomic_long_t
*mib
,
4093 int items
, int bytes
)
4096 int pad
= bytes
- sizeof(u64
) * items
;
4099 /* Use put_unaligned() because stats may not be aligned for u64. */
4100 put_unaligned(items
, &stats
[0]);
4101 for (i
= 1; i
< items
; i
++)
4102 put_unaligned(atomic_long_read(&mib
[i
]), &stats
[i
]);
4104 memset(&stats
[items
], 0, pad
);
4107 static inline void __snmp6_fill_stats64(u64
*stats
, void __percpu
**mib
,
4108 int items
, int bytes
, size_t syncpoff
)
4111 int pad
= bytes
- sizeof(u64
) * items
;
4114 /* Use put_unaligned() because stats may not be aligned for u64. */
4115 put_unaligned(items
, &stats
[0]);
4116 for (i
= 1; i
< items
; i
++)
4117 put_unaligned(snmp_fold_field64(mib
, i
, syncpoff
), &stats
[i
]);
4119 memset(&stats
[items
], 0, pad
);
4122 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
4126 case IFLA_INET6_STATS
:
4127 __snmp6_fill_stats64(stats
, (void __percpu
**)idev
->stats
.ipv6
,
4128 IPSTATS_MIB_MAX
, bytes
, offsetof(struct ipstats_mib
, syncp
));
4130 case IFLA_INET6_ICMP6STATS
:
4131 __snmp6_fill_statsdev(stats
, idev
->stats
.icmpv6dev
->mibs
, ICMP6_MIB_MAX
, bytes
);
4136 static int inet6_fill_ifla6_attrs(struct sk_buff
*skb
, struct inet6_dev
*idev
)
4139 struct ifla_cacheinfo ci
;
4141 if (nla_put_u32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
))
4142 goto nla_put_failure
;
4143 ci
.max_reasm_len
= IPV6_MAXPLEN
;
4144 ci
.tstamp
= cstamp_delta(idev
->tstamp
);
4145 ci
.reachable_time
= jiffies_to_msecs(idev
->nd_parms
->reachable_time
);
4146 ci
.retrans_time
= jiffies_to_msecs(idev
->nd_parms
->retrans_time
);
4147 if (nla_put(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
))
4148 goto nla_put_failure
;
4149 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
4151 goto nla_put_failure
;
4152 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
4154 /* XXX - MC not implemented */
4156 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
4158 goto nla_put_failure
;
4159 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
4161 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
4163 goto nla_put_failure
;
4164 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
4172 static size_t inet6_get_link_af_size(const struct net_device
*dev
)
4174 if (!__in6_dev_get(dev
))
4177 return inet6_ifla6_size();
4180 static int inet6_fill_link_af(struct sk_buff
*skb
, const struct net_device
*dev
)
4182 struct inet6_dev
*idev
= __in6_dev_get(dev
);
4187 if (inet6_fill_ifla6_attrs(skb
, idev
) < 0)
4193 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
4194 u32 portid
, u32 seq
, int event
, unsigned int flags
)
4196 struct net_device
*dev
= idev
->dev
;
4197 struct ifinfomsg
*hdr
;
4198 struct nlmsghdr
*nlh
;
4201 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*hdr
), flags
);
4205 hdr
= nlmsg_data(nlh
);
4206 hdr
->ifi_family
= AF_INET6
;
4208 hdr
->ifi_type
= dev
->type
;
4209 hdr
->ifi_index
= dev
->ifindex
;
4210 hdr
->ifi_flags
= dev_get_flags(dev
);
4211 hdr
->ifi_change
= 0;
4213 if (nla_put_string(skb
, IFLA_IFNAME
, dev
->name
) ||
4215 nla_put(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
)) ||
4216 nla_put_u32(skb
, IFLA_MTU
, dev
->mtu
) ||
4217 (dev
->ifindex
!= dev
->iflink
&&
4218 nla_put_u32(skb
, IFLA_LINK
, dev
->iflink
)))
4219 goto nla_put_failure
;
4220 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
4221 if (protoinfo
== NULL
)
4222 goto nla_put_failure
;
4224 if (inet6_fill_ifla6_attrs(skb
, idev
) < 0)
4225 goto nla_put_failure
;
4227 nla_nest_end(skb
, protoinfo
);
4228 return nlmsg_end(skb
, nlh
);
4231 nlmsg_cancel(skb
, nlh
);
4235 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4237 struct net
*net
= sock_net(skb
->sk
);
4240 struct net_device
*dev
;
4241 struct inet6_dev
*idev
;
4242 struct hlist_head
*head
;
4245 s_idx
= cb
->args
[1];
4248 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
4250 head
= &net
->dev_index_head
[h
];
4251 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
4254 idev
= __in6_dev_get(dev
);
4257 if (inet6_fill_ifinfo(skb
, idev
,
4258 NETLINK_CB(cb
->skb
).portid
,
4260 RTM_NEWLINK
, NLM_F_MULTI
) <= 0)
4274 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
4276 struct sk_buff
*skb
;
4277 struct net
*net
= dev_net(idev
->dev
);
4280 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
4284 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
4286 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
4287 WARN_ON(err
== -EMSGSIZE
);
4291 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFINFO
, NULL
, GFP_ATOMIC
);
4295 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFINFO
, err
);
4298 static inline size_t inet6_prefix_nlmsg_size(void)
4300 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
4301 + nla_total_size(sizeof(struct in6_addr
))
4302 + nla_total_size(sizeof(struct prefix_cacheinfo
));
4305 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
4306 struct prefix_info
*pinfo
, u32 portid
, u32 seq
,
4307 int event
, unsigned int flags
)
4309 struct prefixmsg
*pmsg
;
4310 struct nlmsghdr
*nlh
;
4311 struct prefix_cacheinfo ci
;
4313 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*pmsg
), flags
);
4317 pmsg
= nlmsg_data(nlh
);
4318 pmsg
->prefix_family
= AF_INET6
;
4319 pmsg
->prefix_pad1
= 0;
4320 pmsg
->prefix_pad2
= 0;
4321 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
4322 pmsg
->prefix_len
= pinfo
->prefix_len
;
4323 pmsg
->prefix_type
= pinfo
->type
;
4324 pmsg
->prefix_pad3
= 0;
4325 pmsg
->prefix_flags
= 0;
4327 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
4328 if (pinfo
->autoconf
)
4329 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
4331 if (nla_put(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
))
4332 goto nla_put_failure
;
4333 ci
.preferred_time
= ntohl(pinfo
->prefered
);
4334 ci
.valid_time
= ntohl(pinfo
->valid
);
4335 if (nla_put(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
))
4336 goto nla_put_failure
;
4337 return nlmsg_end(skb
, nlh
);
4340 nlmsg_cancel(skb
, nlh
);
4344 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
4345 struct prefix_info
*pinfo
)
4347 struct sk_buff
*skb
;
4348 struct net
*net
= dev_net(idev
->dev
);
4351 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
4355 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
4357 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
4358 WARN_ON(err
== -EMSGSIZE
);
4362 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
4366 rtnl_set_sk_err(net
, RTNLGRP_IPV6_PREFIX
, err
);
4369 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
4371 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
4376 * If the address was optimistic
4377 * we inserted the route at the start of
4378 * our DAD process, so we don't need
4381 if (!(ifp
->rt
->rt6i_node
))
4382 ip6_ins_rt(ifp
->rt
);
4383 if (ifp
->idev
->cnf
.forwarding
)
4384 addrconf_join_anycast(ifp
);
4387 if (ifp
->idev
->cnf
.forwarding
)
4388 addrconf_leave_anycast(ifp
);
4389 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
4390 dst_hold(&ifp
->rt
->dst
);
4392 if (ip6_del_rt(ifp
->rt
))
4393 dst_free(&ifp
->rt
->dst
);
4398 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
4401 if (likely(ifp
->idev
->dead
== 0))
4402 __ipv6_ifa_notify(event
, ifp
);
4403 rcu_read_unlock_bh();
4406 #ifdef CONFIG_SYSCTL
4409 int addrconf_sysctl_forward(ctl_table
*ctl
, int write
,
4410 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4412 int *valp
= ctl
->data
;
4419 * ctl->data points to idev->cnf.forwarding, we should
4420 * not modify it until we get the rtnl lock.
4425 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
4428 ret
= addrconf_fixup_forwarding(ctl
, valp
, val
);
4434 static void dev_disable_change(struct inet6_dev
*idev
)
4436 if (!idev
|| !idev
->dev
)
4439 if (idev
->cnf
.disable_ipv6
)
4440 addrconf_notify(NULL
, NETDEV_DOWN
, idev
->dev
);
4442 addrconf_notify(NULL
, NETDEV_UP
, idev
->dev
);
4445 static void addrconf_disable_change(struct net
*net
, __s32 newf
)
4447 struct net_device
*dev
;
4448 struct inet6_dev
*idev
;
4451 for_each_netdev_rcu(net
, dev
) {
4452 idev
= __in6_dev_get(dev
);
4454 int changed
= (!idev
->cnf
.disable_ipv6
) ^ (!newf
);
4455 idev
->cnf
.disable_ipv6
= newf
;
4457 dev_disable_change(idev
);
4463 static int addrconf_disable_ipv6(struct ctl_table
*table
, int *p
, int newf
)
4468 if (!rtnl_trylock())
4469 return restart_syscall();
4471 net
= (struct net
*)table
->extra2
;
4475 if (p
== &net
->ipv6
.devconf_dflt
->disable_ipv6
) {
4480 if (p
== &net
->ipv6
.devconf_all
->disable_ipv6
) {
4481 net
->ipv6
.devconf_dflt
->disable_ipv6
= newf
;
4482 addrconf_disable_change(net
, newf
);
4483 } else if ((!newf
) ^ (!old
))
4484 dev_disable_change((struct inet6_dev
*)table
->extra1
);
4491 int addrconf_sysctl_disable(ctl_table
*ctl
, int write
,
4492 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4494 int *valp
= ctl
->data
;
4501 * ctl->data points to idev->cnf.disable_ipv6, we should
4502 * not modify it until we get the rtnl lock.
4507 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
4510 ret
= addrconf_disable_ipv6(ctl
, valp
, val
);
4516 static struct addrconf_sysctl_table
4518 struct ctl_table_header
*sysctl_header
;
4519 ctl_table addrconf_vars
[DEVCONF_MAX
+1];
4520 } addrconf_sysctl __read_mostly
= {
4521 .sysctl_header
= NULL
,
4524 .procname
= "forwarding",
4525 .data
= &ipv6_devconf
.forwarding
,
4526 .maxlen
= sizeof(int),
4528 .proc_handler
= addrconf_sysctl_forward
,
4531 .procname
= "hop_limit",
4532 .data
= &ipv6_devconf
.hop_limit
,
4533 .maxlen
= sizeof(int),
4535 .proc_handler
= proc_dointvec
,
4539 .data
= &ipv6_devconf
.mtu6
,
4540 .maxlen
= sizeof(int),
4542 .proc_handler
= proc_dointvec
,
4545 .procname
= "accept_ra",
4546 .data
= &ipv6_devconf
.accept_ra
,
4547 .maxlen
= sizeof(int),
4549 .proc_handler
= proc_dointvec
,
4552 .procname
= "accept_redirects",
4553 .data
= &ipv6_devconf
.accept_redirects
,
4554 .maxlen
= sizeof(int),
4556 .proc_handler
= proc_dointvec
,
4559 .procname
= "autoconf",
4560 .data
= &ipv6_devconf
.autoconf
,
4561 .maxlen
= sizeof(int),
4563 .proc_handler
= proc_dointvec
,
4566 .procname
= "dad_transmits",
4567 .data
= &ipv6_devconf
.dad_transmits
,
4568 .maxlen
= sizeof(int),
4570 .proc_handler
= proc_dointvec
,
4573 .procname
= "router_solicitations",
4574 .data
= &ipv6_devconf
.rtr_solicits
,
4575 .maxlen
= sizeof(int),
4577 .proc_handler
= proc_dointvec
,
4580 .procname
= "router_solicitation_interval",
4581 .data
= &ipv6_devconf
.rtr_solicit_interval
,
4582 .maxlen
= sizeof(int),
4584 .proc_handler
= proc_dointvec_jiffies
,
4587 .procname
= "router_solicitation_delay",
4588 .data
= &ipv6_devconf
.rtr_solicit_delay
,
4589 .maxlen
= sizeof(int),
4591 .proc_handler
= proc_dointvec_jiffies
,
4594 .procname
= "force_mld_version",
4595 .data
= &ipv6_devconf
.force_mld_version
,
4596 .maxlen
= sizeof(int),
4598 .proc_handler
= proc_dointvec
,
4600 #ifdef CONFIG_IPV6_PRIVACY
4602 .procname
= "use_tempaddr",
4603 .data
= &ipv6_devconf
.use_tempaddr
,
4604 .maxlen
= sizeof(int),
4606 .proc_handler
= proc_dointvec
,
4609 .procname
= "temp_valid_lft",
4610 .data
= &ipv6_devconf
.temp_valid_lft
,
4611 .maxlen
= sizeof(int),
4613 .proc_handler
= proc_dointvec
,
4616 .procname
= "temp_prefered_lft",
4617 .data
= &ipv6_devconf
.temp_prefered_lft
,
4618 .maxlen
= sizeof(int),
4620 .proc_handler
= proc_dointvec
,
4623 .procname
= "regen_max_retry",
4624 .data
= &ipv6_devconf
.regen_max_retry
,
4625 .maxlen
= sizeof(int),
4627 .proc_handler
= proc_dointvec
,
4630 .procname
= "max_desync_factor",
4631 .data
= &ipv6_devconf
.max_desync_factor
,
4632 .maxlen
= sizeof(int),
4634 .proc_handler
= proc_dointvec
,
4638 .procname
= "max_addresses",
4639 .data
= &ipv6_devconf
.max_addresses
,
4640 .maxlen
= sizeof(int),
4642 .proc_handler
= proc_dointvec
,
4645 .procname
= "accept_ra_defrtr",
4646 .data
= &ipv6_devconf
.accept_ra_defrtr
,
4647 .maxlen
= sizeof(int),
4649 .proc_handler
= proc_dointvec
,
4652 .procname
= "accept_ra_pinfo",
4653 .data
= &ipv6_devconf
.accept_ra_pinfo
,
4654 .maxlen
= sizeof(int),
4656 .proc_handler
= proc_dointvec
,
4658 #ifdef CONFIG_IPV6_ROUTER_PREF
4660 .procname
= "accept_ra_rtr_pref",
4661 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
4662 .maxlen
= sizeof(int),
4664 .proc_handler
= proc_dointvec
,
4667 .procname
= "router_probe_interval",
4668 .data
= &ipv6_devconf
.rtr_probe_interval
,
4669 .maxlen
= sizeof(int),
4671 .proc_handler
= proc_dointvec_jiffies
,
4673 #ifdef CONFIG_IPV6_ROUTE_INFO
4675 .procname
= "accept_ra_rt_info_max_plen",
4676 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
4677 .maxlen
= sizeof(int),
4679 .proc_handler
= proc_dointvec
,
4684 .procname
= "proxy_ndp",
4685 .data
= &ipv6_devconf
.proxy_ndp
,
4686 .maxlen
= sizeof(int),
4688 .proc_handler
= proc_dointvec
,
4691 .procname
= "accept_source_route",
4692 .data
= &ipv6_devconf
.accept_source_route
,
4693 .maxlen
= sizeof(int),
4695 .proc_handler
= proc_dointvec
,
4697 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4699 .procname
= "optimistic_dad",
4700 .data
= &ipv6_devconf
.optimistic_dad
,
4701 .maxlen
= sizeof(int),
4703 .proc_handler
= proc_dointvec
,
4707 #ifdef CONFIG_IPV6_MROUTE
4709 .procname
= "mc_forwarding",
4710 .data
= &ipv6_devconf
.mc_forwarding
,
4711 .maxlen
= sizeof(int),
4713 .proc_handler
= proc_dointvec
,
4717 .procname
= "disable_ipv6",
4718 .data
= &ipv6_devconf
.disable_ipv6
,
4719 .maxlen
= sizeof(int),
4721 .proc_handler
= addrconf_sysctl_disable
,
4724 .procname
= "accept_dad",
4725 .data
= &ipv6_devconf
.accept_dad
,
4726 .maxlen
= sizeof(int),
4728 .proc_handler
= proc_dointvec
,
4731 .procname
= "force_tllao",
4732 .data
= &ipv6_devconf
.force_tllao
,
4733 .maxlen
= sizeof(int),
4735 .proc_handler
= proc_dointvec
4738 .procname
= "ndisc_notify",
4739 .data
= &ipv6_devconf
.ndisc_notify
,
4740 .maxlen
= sizeof(int),
4742 .proc_handler
= proc_dointvec
4750 static int __addrconf_sysctl_register(struct net
*net
, char *dev_name
,
4751 struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
4754 struct addrconf_sysctl_table
*t
;
4755 char path
[sizeof("net/ipv6/conf/") + IFNAMSIZ
];
4757 t
= kmemdup(&addrconf_sysctl
, sizeof(*t
), GFP_KERNEL
);
4761 for (i
= 0; t
->addrconf_vars
[i
].data
; i
++) {
4762 t
->addrconf_vars
[i
].data
+= (char *)p
- (char *)&ipv6_devconf
;
4763 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
4764 t
->addrconf_vars
[i
].extra2
= net
;
4767 snprintf(path
, sizeof(path
), "net/ipv6/conf/%s", dev_name
);
4769 t
->sysctl_header
= register_net_sysctl(net
, path
, t
->addrconf_vars
);
4770 if (t
->sysctl_header
== NULL
)
4782 static void __addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
4784 struct addrconf_sysctl_table
*t
;
4786 if (p
->sysctl
== NULL
)
4791 unregister_net_sysctl_table(t
->sysctl_header
);
4795 static void addrconf_sysctl_register(struct inet6_dev
*idev
)
4797 neigh_sysctl_register(idev
->dev
, idev
->nd_parms
, "ipv6",
4798 &ndisc_ifinfo_sysctl_change
);
4799 __addrconf_sysctl_register(dev_net(idev
->dev
), idev
->dev
->name
,
4803 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
4805 __addrconf_sysctl_unregister(&idev
->cnf
);
4806 neigh_sysctl_unregister(idev
->nd_parms
);
4812 static int __net_init
addrconf_init_net(struct net
*net
)
4815 struct ipv6_devconf
*all
, *dflt
;
4817 all
= kmemdup(&ipv6_devconf
, sizeof(ipv6_devconf
), GFP_KERNEL
);
4821 dflt
= kmemdup(&ipv6_devconf_dflt
, sizeof(ipv6_devconf_dflt
), GFP_KERNEL
);
4823 goto err_alloc_dflt
;
4825 /* these will be inherited by all namespaces */
4826 dflt
->autoconf
= ipv6_defaults
.autoconf
;
4827 dflt
->disable_ipv6
= ipv6_defaults
.disable_ipv6
;
4829 net
->ipv6
.devconf_all
= all
;
4830 net
->ipv6
.devconf_dflt
= dflt
;
4832 #ifdef CONFIG_SYSCTL
4833 err
= __addrconf_sysctl_register(net
, "all", NULL
, all
);
4837 err
= __addrconf_sysctl_register(net
, "default", NULL
, dflt
);
4843 #ifdef CONFIG_SYSCTL
4845 __addrconf_sysctl_unregister(all
);
4855 static void __net_exit
addrconf_exit_net(struct net
*net
)
4857 #ifdef CONFIG_SYSCTL
4858 __addrconf_sysctl_unregister(net
->ipv6
.devconf_dflt
);
4859 __addrconf_sysctl_unregister(net
->ipv6
.devconf_all
);
4861 if (!net_eq(net
, &init_net
)) {
4862 kfree(net
->ipv6
.devconf_dflt
);
4863 kfree(net
->ipv6
.devconf_all
);
4867 static struct pernet_operations addrconf_ops
= {
4868 .init
= addrconf_init_net
,
4869 .exit
= addrconf_exit_net
,
4876 int register_inet6addr_notifier(struct notifier_block
*nb
)
4878 return atomic_notifier_chain_register(&inet6addr_chain
, nb
);
4880 EXPORT_SYMBOL(register_inet6addr_notifier
);
4882 int unregister_inet6addr_notifier(struct notifier_block
*nb
)
4884 return atomic_notifier_chain_unregister(&inet6addr_chain
, nb
);
4886 EXPORT_SYMBOL(unregister_inet6addr_notifier
);
4888 static struct rtnl_af_ops inet6_ops
= {
4890 .fill_link_af
= inet6_fill_link_af
,
4891 .get_link_af_size
= inet6_get_link_af_size
,
4895 * Init / cleanup code
4898 int __init
addrconf_init(void)
4902 err
= ipv6_addr_label_init();
4904 pr_crit("%s: cannot initialize default policy table: %d\n",
4909 err
= register_pernet_subsys(&addrconf_ops
);
4913 /* The addrconf netdev notifier requires that loopback_dev
4914 * has it's ipv6 private information allocated and setup
4915 * before it can bring up and give link-local addresses
4916 * to other devices which are up.
4918 * Unfortunately, loopback_dev is not necessarily the first
4919 * entry in the global dev_base list of net devices. In fact,
4920 * it is likely to be the very last entry on that list.
4921 * So this causes the notifier registry below to try and
4922 * give link-local addresses to all devices besides loopback_dev
4923 * first, then loopback_dev, which cases all the non-loopback_dev
4924 * devices to fail to get a link-local address.
4926 * So, as a temporary fix, allocate the ipv6 structure for
4927 * loopback_dev first by hand.
4928 * Longer term, all of the dependencies ipv6 has upon the loopback
4929 * device and it being up should be removed.
4932 if (!ipv6_add_dev(init_net
.loopback_dev
))
4938 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
4939 INIT_HLIST_HEAD(&inet6_addr_lst
[i
]);
4941 register_netdevice_notifier(&ipv6_dev_notf
);
4945 err
= rtnl_af_register(&inet6_ops
);
4949 err
= __rtnl_register(PF_INET6
, RTM_GETLINK
, NULL
, inet6_dump_ifinfo
,
4954 /* Only the first call to __rtnl_register can fail */
4955 __rtnl_register(PF_INET6
, RTM_NEWADDR
, inet6_rtm_newaddr
, NULL
, NULL
);
4956 __rtnl_register(PF_INET6
, RTM_DELADDR
, inet6_rtm_deladdr
, NULL
, NULL
);
4957 __rtnl_register(PF_INET6
, RTM_GETADDR
, inet6_rtm_getaddr
,
4958 inet6_dump_ifaddr
, NULL
);
4959 __rtnl_register(PF_INET6
, RTM_GETMULTICAST
, NULL
,
4960 inet6_dump_ifmcaddr
, NULL
);
4961 __rtnl_register(PF_INET6
, RTM_GETANYCAST
, NULL
,
4962 inet6_dump_ifacaddr
, NULL
);
4963 __rtnl_register(PF_INET6
, RTM_GETNETCONF
, inet6_netconf_get_devconf
,
4966 ipv6_addr_label_rtnl_register();
4970 rtnl_af_unregister(&inet6_ops
);
4972 unregister_netdevice_notifier(&ipv6_dev_notf
);
4974 unregister_pernet_subsys(&addrconf_ops
);
4976 ipv6_addr_label_cleanup();
4981 void addrconf_cleanup(void)
4983 struct net_device
*dev
;
4986 unregister_netdevice_notifier(&ipv6_dev_notf
);
4987 unregister_pernet_subsys(&addrconf_ops
);
4988 ipv6_addr_label_cleanup();
4992 __rtnl_af_unregister(&inet6_ops
);
4994 /* clean dev list */
4995 for_each_netdev(&init_net
, dev
) {
4996 if (__in6_dev_get(dev
) == NULL
)
4998 addrconf_ifdown(dev
, 1);
5000 addrconf_ifdown(init_net
.loopback_dev
, 2);
5005 spin_lock_bh(&addrconf_hash_lock
);
5006 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
5007 WARN_ON(!hlist_empty(&inet6_addr_lst
[i
]));
5008 spin_unlock_bh(&addrconf_hash_lock
);
5010 del_timer(&addr_chk_timer
);