2 * IPv6 Address [auto]configuration
3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
7 * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
18 * Janos Farkas : delete timer on ifdown
19 * <chexum@bankinf.banki.hu>
20 * Andi Kleen : kill double kfree on module
22 * Maciej W. Rozycki : FDDI support
23 * sekiya@USAGI : Don't send too many RS
25 * yoshfuji@USAGI : Fixed interval between DAD
27 * YOSHIFUJI Hideaki @USAGI : improved accuracy of
28 * address validation timer.
29 * YOSHIFUJI Hideaki @USAGI : Privacy Extensions (RFC3041)
31 * Yuji SEKIYA @USAGI : Don't assign a same IPv6
32 * address on a same interface.
33 * YOSHIFUJI Hideaki @USAGI : ARCnet support
34 * YOSHIFUJI Hideaki @USAGI : convert /proc/net/if_inet6 to
36 * YOSHIFUJI Hideaki @USAGI : improved source address
37 * selection; consider scope,
41 #define pr_fmt(fmt) "IPv6: " fmt
43 #include <linux/errno.h>
44 #include <linux/types.h>
45 #include <linux/kernel.h>
46 #include <linux/socket.h>
47 #include <linux/sockios.h>
48 #include <linux/net.h>
49 #include <linux/in6.h>
50 #include <linux/netdevice.h>
51 #include <linux/if_addr.h>
52 #include <linux/if_arp.h>
53 #include <linux/if_arcnet.h>
54 #include <linux/if_infiniband.h>
55 #include <linux/route.h>
56 #include <linux/inetdevice.h>
57 #include <linux/init.h>
58 #include <linux/slab.h>
60 #include <linux/sysctl.h>
62 #include <linux/capability.h>
63 #include <linux/delay.h>
64 #include <linux/notifier.h>
65 #include <linux/string.h>
66 #include <linux/hash.h>
68 #include <net/net_namespace.h>
72 #include <net/af_ieee802154.h>
73 #include <net/firewire.h>
75 #include <net/protocol.h>
76 #include <net/ndisc.h>
77 #include <net/ip6_route.h>
78 #include <net/addrconf.h>
81 #include <net/netlink.h>
82 #include <net/pkt_sched.h>
83 #include <linux/if_tunnel.h>
84 #include <linux/rtnetlink.h>
85 #include <linux/netconf.h>
86 #include <linux/random.h>
87 #include <linux/uaccess.h>
88 #include <asm/unaligned.h>
90 #include <linux/proc_fs.h>
91 #include <linux/seq_file.h>
92 #include <linux/export.h>
94 /* Set to 3 to get tracing... */
98 #define ADBG(fmt, ...) printk(fmt, ##__VA_ARGS__)
100 #define ADBG(fmt, ...) do { if (0) printk(fmt, ##__VA_ARGS__); } while (0)
103 #define INFINITY_LIFE_TIME 0xFFFFFFFF
105 static inline u32
cstamp_delta(unsigned long cstamp
)
107 return (cstamp
- INITIAL_JIFFIES
) * 100UL / HZ
;
111 static int addrconf_sysctl_register(struct inet6_dev
*idev
);
112 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
);
114 static inline int addrconf_sysctl_register(struct inet6_dev
*idev
)
119 static inline void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
124 static void __ipv6_regen_rndid(struct inet6_dev
*idev
);
125 static void __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
);
126 static void ipv6_regen_rndid(unsigned long data
);
128 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
);
129 static int ipv6_count_addresses(struct inet6_dev
*idev
);
132 * Configured unicast address hash table
134 static struct hlist_head inet6_addr_lst
[IN6_ADDR_HSIZE
];
135 static DEFINE_SPINLOCK(addrconf_hash_lock
);
137 static void addrconf_verify(void);
138 static void addrconf_verify_rtnl(void);
139 static void addrconf_verify_work(struct work_struct
*);
141 static struct workqueue_struct
*addrconf_wq
;
142 static DECLARE_DELAYED_WORK(addr_chk_work
, addrconf_verify_work
);
144 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
);
145 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
);
147 static void addrconf_type_change(struct net_device
*dev
,
148 unsigned long event
);
149 static int addrconf_ifdown(struct net_device
*dev
, int how
);
151 static struct rt6_info
*addrconf_get_prefix_route(const struct in6_addr
*pfx
,
153 const struct net_device
*dev
,
154 u32 flags
, u32 noflags
);
156 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
);
157 static void addrconf_dad_work(struct work_struct
*w
);
158 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
);
159 static void addrconf_dad_run(struct inet6_dev
*idev
);
160 static void addrconf_rs_timer(unsigned long data
);
161 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
162 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
);
164 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
165 struct prefix_info
*pinfo
);
166 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
167 struct net_device
*dev
);
169 static struct ipv6_devconf ipv6_devconf __read_mostly
= {
171 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
172 .mtu6
= IPV6_MIN_MTU
,
174 .accept_redirects
= 1,
176 .force_mld_version
= 0,
177 .mldv1_unsolicited_report_interval
= 10 * HZ
,
178 .mldv2_unsolicited_report_interval
= HZ
,
180 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
181 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
182 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
184 .temp_valid_lft
= TEMP_VALID_LIFETIME
,
185 .temp_prefered_lft
= TEMP_PREFERRED_LIFETIME
,
186 .regen_max_retry
= REGEN_MAX_RETRY
,
187 .max_desync_factor
= MAX_DESYNC_FACTOR
,
188 .max_addresses
= IPV6_MAX_ADDRESSES
,
189 .accept_ra_defrtr
= 1,
190 .accept_ra_from_local
= 0,
191 .accept_ra_pinfo
= 1,
192 #ifdef CONFIG_IPV6_ROUTER_PREF
193 .accept_ra_rtr_pref
= 1,
194 .rtr_probe_interval
= 60 * HZ
,
195 #ifdef CONFIG_IPV6_ROUTE_INFO
196 .accept_ra_rt_info_max_plen
= 0,
200 .accept_source_route
= 0, /* we do not accept RH0 by default. */
203 .suppress_frag_ndisc
= 1,
206 static struct ipv6_devconf ipv6_devconf_dflt __read_mostly
= {
208 .hop_limit
= IPV6_DEFAULT_HOPLIMIT
,
209 .mtu6
= IPV6_MIN_MTU
,
211 .accept_redirects
= 1,
213 .force_mld_version
= 0,
214 .mldv1_unsolicited_report_interval
= 10 * HZ
,
215 .mldv2_unsolicited_report_interval
= HZ
,
217 .rtr_solicits
= MAX_RTR_SOLICITATIONS
,
218 .rtr_solicit_interval
= RTR_SOLICITATION_INTERVAL
,
219 .rtr_solicit_delay
= MAX_RTR_SOLICITATION_DELAY
,
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
,
225 .max_addresses
= IPV6_MAX_ADDRESSES
,
226 .accept_ra_defrtr
= 1,
227 .accept_ra_from_local
= 0,
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. */
240 .suppress_frag_ndisc
= 1,
243 /* Check if a valid qdisc is available */
244 static inline bool addrconf_qdisc_ok(const struct net_device
*dev
)
246 return !qdisc_tx_is_noop(dev
);
249 static void addrconf_del_rs_timer(struct inet6_dev
*idev
)
251 if (del_timer(&idev
->rs_timer
))
255 static void addrconf_del_dad_work(struct inet6_ifaddr
*ifp
)
257 if (cancel_delayed_work(&ifp
->dad_work
))
261 static void addrconf_mod_rs_timer(struct inet6_dev
*idev
,
264 if (!timer_pending(&idev
->rs_timer
))
266 mod_timer(&idev
->rs_timer
, jiffies
+ when
);
269 static void addrconf_mod_dad_work(struct inet6_ifaddr
*ifp
,
272 if (!delayed_work_pending(&ifp
->dad_work
))
274 mod_delayed_work(addrconf_wq
, &ifp
->dad_work
, delay
);
277 static int snmp6_alloc_dev(struct inet6_dev
*idev
)
281 idev
->stats
.ipv6
= alloc_percpu(struct ipstats_mib
);
282 if (!idev
->stats
.ipv6
)
285 for_each_possible_cpu(i
) {
286 struct ipstats_mib
*addrconf_stats
;
287 addrconf_stats
= per_cpu_ptr(idev
->stats
.ipv6
, i
);
288 u64_stats_init(&addrconf_stats
->syncp
);
292 idev
->stats
.icmpv6dev
= kzalloc(sizeof(struct icmpv6_mib_device
),
294 if (!idev
->stats
.icmpv6dev
)
296 idev
->stats
.icmpv6msgdev
= kzalloc(sizeof(struct icmpv6msg_mib_device
),
298 if (!idev
->stats
.icmpv6msgdev
)
304 kfree(idev
->stats
.icmpv6dev
);
306 free_percpu(idev
->stats
.ipv6
);
311 static struct inet6_dev
*ipv6_add_dev(struct net_device
*dev
)
313 struct inet6_dev
*ndev
;
318 if (dev
->mtu
< IPV6_MIN_MTU
)
319 return ERR_PTR(-EINVAL
);
321 ndev
= kzalloc(sizeof(struct inet6_dev
), GFP_KERNEL
);
325 rwlock_init(&ndev
->lock
);
327 INIT_LIST_HEAD(&ndev
->addr_list
);
328 setup_timer(&ndev
->rs_timer
, addrconf_rs_timer
,
329 (unsigned long)ndev
);
330 memcpy(&ndev
->cnf
, dev_net(dev
)->ipv6
.devconf_dflt
, sizeof(ndev
->cnf
));
331 ndev
->cnf
.mtu6
= dev
->mtu
;
332 ndev
->cnf
.sysctl
= NULL
;
333 ndev
->nd_parms
= neigh_parms_alloc(dev
, &nd_tbl
);
334 if (ndev
->nd_parms
== NULL
) {
338 if (ndev
->cnf
.forwarding
)
339 dev_disable_lro(dev
);
340 /* We refer to the device */
343 if (snmp6_alloc_dev(ndev
) < 0) {
345 "%s: cannot allocate memory for statistics; dev=%s.\n",
346 __func__
, dev
->name
);
347 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
353 if (snmp6_register_dev(ndev
) < 0) {
355 "%s: cannot create /proc/net/dev_snmp6/%s\n",
356 __func__
, dev
->name
);
360 /* One reference from device. We must do this before
361 * we invoke __ipv6_regen_rndid().
365 if (dev
->flags
& (IFF_NOARP
| IFF_LOOPBACK
))
366 ndev
->cnf
.accept_dad
= -1;
368 #if IS_ENABLED(CONFIG_IPV6_SIT)
369 if (dev
->type
== ARPHRD_SIT
&& (dev
->priv_flags
& IFF_ISATAP
)) {
370 pr_info("%s: Disabled Multicast RS\n", dev
->name
);
371 ndev
->cnf
.rtr_solicits
= 0;
375 INIT_LIST_HEAD(&ndev
->tempaddr_list
);
376 setup_timer(&ndev
->regen_timer
, ipv6_regen_rndid
, (unsigned long)ndev
);
377 if ((dev
->flags
&IFF_LOOPBACK
) ||
378 dev
->type
== ARPHRD_TUNNEL
||
379 dev
->type
== ARPHRD_TUNNEL6
||
380 dev
->type
== ARPHRD_SIT
||
381 dev
->type
== ARPHRD_NONE
) {
382 ndev
->cnf
.use_tempaddr
= -1;
385 ipv6_regen_rndid((unsigned long) ndev
);
388 ndev
->token
= in6addr_any
;
390 if (netif_running(dev
) && addrconf_qdisc_ok(dev
))
391 ndev
->if_flags
|= IF_READY
;
393 ipv6_mc_init_dev(ndev
);
394 ndev
->tstamp
= jiffies
;
395 err
= addrconf_sysctl_register(ndev
);
397 ipv6_mc_destroy_dev(ndev
);
398 del_timer(&ndev
->regen_timer
);
401 /* protected by rtnl_lock */
402 rcu_assign_pointer(dev
->ip6_ptr
, ndev
);
404 /* Join interface-local all-node multicast group */
405 ipv6_dev_mc_inc(dev
, &in6addr_interfacelocal_allnodes
);
407 /* Join all-node multicast group */
408 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allnodes
);
410 /* Join all-router multicast group if forwarding is set */
411 if (ndev
->cnf
.forwarding
&& (dev
->flags
& IFF_MULTICAST
))
412 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
417 neigh_parms_release(&nd_tbl
, ndev
->nd_parms
);
419 in6_dev_finish_destroy(ndev
);
423 static struct inet6_dev
*ipv6_find_idev(struct net_device
*dev
)
425 struct inet6_dev
*idev
;
429 idev
= __in6_dev_get(dev
);
431 idev
= ipv6_add_dev(dev
);
436 if (dev
->flags
&IFF_UP
)
441 static int inet6_netconf_msgsize_devconf(int type
)
443 int size
= NLMSG_ALIGN(sizeof(struct netconfmsg
))
444 + nla_total_size(4); /* NETCONFA_IFINDEX */
446 /* type -1 is used for ALL */
447 if (type
== -1 || type
== NETCONFA_FORWARDING
)
448 size
+= nla_total_size(4);
449 #ifdef CONFIG_IPV6_MROUTE
450 if (type
== -1 || type
== NETCONFA_MC_FORWARDING
)
451 size
+= nla_total_size(4);
453 if (type
== -1 || type
== NETCONFA_PROXY_NEIGH
)
454 size
+= nla_total_size(4);
459 static int inet6_netconf_fill_devconf(struct sk_buff
*skb
, int ifindex
,
460 struct ipv6_devconf
*devconf
, u32 portid
,
461 u32 seq
, int event
, unsigned int flags
,
464 struct nlmsghdr
*nlh
;
465 struct netconfmsg
*ncm
;
467 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct netconfmsg
),
472 ncm
= nlmsg_data(nlh
);
473 ncm
->ncm_family
= AF_INET6
;
475 if (nla_put_s32(skb
, NETCONFA_IFINDEX
, ifindex
) < 0)
476 goto nla_put_failure
;
478 /* type -1 is used for ALL */
479 if ((type
== -1 || type
== NETCONFA_FORWARDING
) &&
480 nla_put_s32(skb
, NETCONFA_FORWARDING
, devconf
->forwarding
) < 0)
481 goto nla_put_failure
;
482 #ifdef CONFIG_IPV6_MROUTE
483 if ((type
== -1 || type
== NETCONFA_MC_FORWARDING
) &&
484 nla_put_s32(skb
, NETCONFA_MC_FORWARDING
,
485 devconf
->mc_forwarding
) < 0)
486 goto nla_put_failure
;
488 if ((type
== -1 || type
== NETCONFA_PROXY_NEIGH
) &&
489 nla_put_s32(skb
, NETCONFA_PROXY_NEIGH
, devconf
->proxy_ndp
) < 0)
490 goto nla_put_failure
;
492 return nlmsg_end(skb
, nlh
);
495 nlmsg_cancel(skb
, nlh
);
499 void inet6_netconf_notify_devconf(struct net
*net
, int type
, int ifindex
,
500 struct ipv6_devconf
*devconf
)
505 skb
= nlmsg_new(inet6_netconf_msgsize_devconf(type
), GFP_ATOMIC
);
509 err
= inet6_netconf_fill_devconf(skb
, ifindex
, devconf
, 0, 0,
510 RTM_NEWNETCONF
, 0, type
);
512 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
513 WARN_ON(err
== -EMSGSIZE
);
517 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_NETCONF
, NULL
, GFP_ATOMIC
);
520 rtnl_set_sk_err(net
, RTNLGRP_IPV6_NETCONF
, err
);
523 static const struct nla_policy devconf_ipv6_policy
[NETCONFA_MAX
+1] = {
524 [NETCONFA_IFINDEX
] = { .len
= sizeof(int) },
525 [NETCONFA_FORWARDING
] = { .len
= sizeof(int) },
526 [NETCONFA_PROXY_NEIGH
] = { .len
= sizeof(int) },
529 static int inet6_netconf_get_devconf(struct sk_buff
*in_skb
,
530 struct nlmsghdr
*nlh
)
532 struct net
*net
= sock_net(in_skb
->sk
);
533 struct nlattr
*tb
[NETCONFA_MAX
+1];
534 struct netconfmsg
*ncm
;
536 struct ipv6_devconf
*devconf
;
537 struct inet6_dev
*in6_dev
;
538 struct net_device
*dev
;
542 err
= nlmsg_parse(nlh
, sizeof(*ncm
), tb
, NETCONFA_MAX
,
543 devconf_ipv6_policy
);
548 if (!tb
[NETCONFA_IFINDEX
])
551 ifindex
= nla_get_s32(tb
[NETCONFA_IFINDEX
]);
553 case NETCONFA_IFINDEX_ALL
:
554 devconf
= net
->ipv6
.devconf_all
;
556 case NETCONFA_IFINDEX_DEFAULT
:
557 devconf
= net
->ipv6
.devconf_dflt
;
560 dev
= __dev_get_by_index(net
, ifindex
);
563 in6_dev
= __in6_dev_get(dev
);
566 devconf
= &in6_dev
->cnf
;
571 skb
= nlmsg_new(inet6_netconf_msgsize_devconf(-1), GFP_ATOMIC
);
575 err
= inet6_netconf_fill_devconf(skb
, ifindex
, devconf
,
576 NETLINK_CB(in_skb
).portid
,
577 nlh
->nlmsg_seq
, RTM_NEWNETCONF
, 0,
580 /* -EMSGSIZE implies BUG in inet6_netconf_msgsize_devconf() */
581 WARN_ON(err
== -EMSGSIZE
);
585 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).portid
);
590 static int inet6_netconf_dump_devconf(struct sk_buff
*skb
,
591 struct netlink_callback
*cb
)
593 struct net
*net
= sock_net(skb
->sk
);
596 struct net_device
*dev
;
597 struct inet6_dev
*idev
;
598 struct hlist_head
*head
;
601 s_idx
= idx
= cb
->args
[1];
603 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
605 head
= &net
->dev_index_head
[h
];
607 cb
->seq
= atomic_read(&net
->ipv6
.dev_addr_genid
) ^
609 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
612 idev
= __in6_dev_get(dev
);
616 if (inet6_netconf_fill_devconf(skb
, dev
->ifindex
,
618 NETLINK_CB(cb
->skb
).portid
,
626 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
632 if (h
== NETDEV_HASHENTRIES
) {
633 if (inet6_netconf_fill_devconf(skb
, NETCONFA_IFINDEX_ALL
,
634 net
->ipv6
.devconf_all
,
635 NETLINK_CB(cb
->skb
).portid
,
637 RTM_NEWNETCONF
, NLM_F_MULTI
,
643 if (h
== NETDEV_HASHENTRIES
+ 1) {
644 if (inet6_netconf_fill_devconf(skb
, NETCONFA_IFINDEX_DEFAULT
,
645 net
->ipv6
.devconf_dflt
,
646 NETLINK_CB(cb
->skb
).portid
,
648 RTM_NEWNETCONF
, NLM_F_MULTI
,
662 static void dev_forward_change(struct inet6_dev
*idev
)
664 struct net_device
*dev
;
665 struct inet6_ifaddr
*ifa
;
670 if (idev
->cnf
.forwarding
)
671 dev_disable_lro(dev
);
672 if (dev
->flags
& IFF_MULTICAST
) {
673 if (idev
->cnf
.forwarding
) {
674 ipv6_dev_mc_inc(dev
, &in6addr_linklocal_allrouters
);
675 ipv6_dev_mc_inc(dev
, &in6addr_interfacelocal_allrouters
);
676 ipv6_dev_mc_inc(dev
, &in6addr_sitelocal_allrouters
);
678 ipv6_dev_mc_dec(dev
, &in6addr_linklocal_allrouters
);
679 ipv6_dev_mc_dec(dev
, &in6addr_interfacelocal_allrouters
);
680 ipv6_dev_mc_dec(dev
, &in6addr_sitelocal_allrouters
);
684 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
685 if (ifa
->flags
&IFA_F_TENTATIVE
)
687 if (idev
->cnf
.forwarding
)
688 addrconf_join_anycast(ifa
);
690 addrconf_leave_anycast(ifa
);
692 inet6_netconf_notify_devconf(dev_net(dev
), NETCONFA_FORWARDING
,
693 dev
->ifindex
, &idev
->cnf
);
697 static void addrconf_forward_change(struct net
*net
, __s32 newf
)
699 struct net_device
*dev
;
700 struct inet6_dev
*idev
;
702 for_each_netdev(net
, dev
) {
703 idev
= __in6_dev_get(dev
);
705 int changed
= (!idev
->cnf
.forwarding
) ^ (!newf
);
706 idev
->cnf
.forwarding
= newf
;
708 dev_forward_change(idev
);
713 static int addrconf_fixup_forwarding(struct ctl_table
*table
, int *p
, int newf
)
719 return restart_syscall();
721 net
= (struct net
*)table
->extra2
;
725 if (p
== &net
->ipv6
.devconf_dflt
->forwarding
) {
726 if ((!newf
) ^ (!old
))
727 inet6_netconf_notify_devconf(net
, NETCONFA_FORWARDING
,
728 NETCONFA_IFINDEX_DEFAULT
,
729 net
->ipv6
.devconf_dflt
);
734 if (p
== &net
->ipv6
.devconf_all
->forwarding
) {
735 net
->ipv6
.devconf_dflt
->forwarding
= newf
;
736 addrconf_forward_change(net
, newf
);
737 if ((!newf
) ^ (!old
))
738 inet6_netconf_notify_devconf(net
, NETCONFA_FORWARDING
,
739 NETCONFA_IFINDEX_ALL
,
740 net
->ipv6
.devconf_all
);
741 } else if ((!newf
) ^ (!old
))
742 dev_forward_change((struct inet6_dev
*)table
->extra1
);
746 rt6_purge_dflt_routers(net
);
751 /* Nobody refers to this ifaddr, destroy it */
752 void inet6_ifa_finish_destroy(struct inet6_ifaddr
*ifp
)
754 WARN_ON(!hlist_unhashed(&ifp
->addr_lst
));
756 #ifdef NET_REFCNT_DEBUG
757 pr_debug("%s\n", __func__
);
760 in6_dev_put(ifp
->idev
);
762 if (cancel_delayed_work(&ifp
->dad_work
))
763 pr_notice("delayed DAD work was pending while freeing ifa=%p\n",
766 if (ifp
->state
!= INET6_IFADDR_STATE_DEAD
) {
767 pr_warn("Freeing alive inet6 address %p\n", ifp
);
776 ipv6_link_dev_addr(struct inet6_dev
*idev
, struct inet6_ifaddr
*ifp
)
779 int ifp_scope
= ipv6_addr_src_scope(&ifp
->addr
);
782 * Each device address list is sorted in order of scope -
783 * global before linklocal.
785 list_for_each(p
, &idev
->addr_list
) {
786 struct inet6_ifaddr
*ifa
787 = list_entry(p
, struct inet6_ifaddr
, if_list
);
788 if (ifp_scope
>= ipv6_addr_src_scope(&ifa
->addr
))
792 list_add_tail(&ifp
->if_list
, p
);
795 static u32
inet6_addr_hash(const struct in6_addr
*addr
)
797 return hash_32(ipv6_addr_hash(addr
), IN6_ADDR_HSIZE_SHIFT
);
800 /* On success it returns ifp with increased reference count */
802 static struct inet6_ifaddr
*
803 ipv6_add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
804 const struct in6_addr
*peer_addr
, int pfxlen
,
805 int scope
, u32 flags
, u32 valid_lft
, u32 prefered_lft
)
807 struct inet6_ifaddr
*ifa
= NULL
;
811 int addr_type
= ipv6_addr_type(addr
);
813 if (addr_type
== IPV6_ADDR_ANY
||
814 addr_type
& IPV6_ADDR_MULTICAST
||
815 (!(idev
->dev
->flags
& IFF_LOOPBACK
) &&
816 addr_type
& IPV6_ADDR_LOOPBACK
))
817 return ERR_PTR(-EADDRNOTAVAIL
);
821 err
= -ENODEV
; /*XXX*/
825 if (idev
->cnf
.disable_ipv6
) {
830 spin_lock(&addrconf_hash_lock
);
832 /* Ignore adding duplicate addresses on an interface */
833 if (ipv6_chk_same_addr(dev_net(idev
->dev
), addr
, idev
->dev
)) {
834 ADBG("ipv6_add_addr: already assigned\n");
839 ifa
= kzalloc(sizeof(struct inet6_ifaddr
), GFP_ATOMIC
);
842 ADBG("ipv6_add_addr: malloc failed\n");
847 rt
= addrconf_dst_alloc(idev
, addr
, false);
853 neigh_parms_data_state_setall(idev
->nd_parms
);
857 ifa
->peer_addr
= *peer_addr
;
859 spin_lock_init(&ifa
->lock
);
860 spin_lock_init(&ifa
->state_lock
);
861 INIT_DELAYED_WORK(&ifa
->dad_work
, addrconf_dad_work
);
862 INIT_HLIST_NODE(&ifa
->addr_lst
);
864 ifa
->prefix_len
= pfxlen
;
865 ifa
->flags
= flags
| IFA_F_TENTATIVE
;
866 ifa
->valid_lft
= valid_lft
;
867 ifa
->prefered_lft
= prefered_lft
;
868 ifa
->cstamp
= ifa
->tstamp
= jiffies
;
869 ifa
->tokenized
= false;
878 /* Add to big hash table */
879 hash
= inet6_addr_hash(addr
);
881 hlist_add_head_rcu(&ifa
->addr_lst
, &inet6_addr_lst
[hash
]);
882 spin_unlock(&addrconf_hash_lock
);
884 write_lock(&idev
->lock
);
885 /* Add to inet6_dev unicast addr list. */
886 ipv6_link_dev_addr(idev
, ifa
);
888 if (ifa
->flags
&IFA_F_TEMPORARY
) {
889 list_add(&ifa
->tmp_list
, &idev
->tempaddr_list
);
894 write_unlock(&idev
->lock
);
896 rcu_read_unlock_bh();
898 if (likely(err
== 0))
899 inet6addr_notifier_call_chain(NETDEV_UP
, ifa
);
907 spin_unlock(&addrconf_hash_lock
);
911 enum cleanup_prefix_rt_t
{
912 CLEANUP_PREFIX_RT_NOP
, /* no cleanup action for prefix route */
913 CLEANUP_PREFIX_RT_DEL
, /* delete the prefix route */
914 CLEANUP_PREFIX_RT_EXPIRE
, /* update the lifetime of the prefix route */
918 * Check, whether the prefix for ifp would still need a prefix route
919 * after deleting ifp. The function returns one of the CLEANUP_PREFIX_RT_*
922 * 1) we don't purge prefix if address was not permanent.
923 * prefix is managed by its own lifetime.
924 * 2) we also don't purge, if the address was IFA_F_NOPREFIXROUTE.
925 * 3) if there are no addresses, delete prefix.
926 * 4) if there are still other permanent address(es),
927 * corresponding prefix is still permanent.
928 * 5) if there are still other addresses with IFA_F_NOPREFIXROUTE,
929 * don't purge the prefix, assume user space is managing it.
930 * 6) otherwise, update prefix lifetime to the
931 * longest valid lifetime among the corresponding
932 * addresses on the device.
933 * Note: subsequent RA will update lifetime.
935 static enum cleanup_prefix_rt_t
936 check_cleanup_prefix_route(struct inet6_ifaddr
*ifp
, unsigned long *expires
)
938 struct inet6_ifaddr
*ifa
;
939 struct inet6_dev
*idev
= ifp
->idev
;
940 unsigned long lifetime
;
941 enum cleanup_prefix_rt_t action
= CLEANUP_PREFIX_RT_DEL
;
945 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
948 if (!ipv6_prefix_equal(&ifa
->addr
, &ifp
->addr
,
951 if (ifa
->flags
& (IFA_F_PERMANENT
| IFA_F_NOPREFIXROUTE
))
952 return CLEANUP_PREFIX_RT_NOP
;
954 action
= CLEANUP_PREFIX_RT_EXPIRE
;
956 spin_lock(&ifa
->lock
);
958 lifetime
= addrconf_timeout_fixup(ifa
->valid_lft
, HZ
);
960 * Note: Because this address is
961 * not permanent, lifetime <
962 * LONG_MAX / HZ here.
964 if (time_before(*expires
, ifa
->tstamp
+ lifetime
* HZ
))
965 *expires
= ifa
->tstamp
+ lifetime
* HZ
;
966 spin_unlock(&ifa
->lock
);
973 cleanup_prefix_route(struct inet6_ifaddr
*ifp
, unsigned long expires
, bool del_rt
)
977 rt
= addrconf_get_prefix_route(&ifp
->addr
,
980 0, RTF_GATEWAY
| RTF_DEFAULT
);
985 if (!(rt
->rt6i_flags
& RTF_EXPIRES
))
986 rt6_set_expires(rt
, expires
);
993 /* This function wants to get referenced ifp and releases it before return */
995 static void ipv6_del_addr(struct inet6_ifaddr
*ifp
)
998 enum cleanup_prefix_rt_t action
= CLEANUP_PREFIX_RT_NOP
;
999 unsigned long expires
;
1003 spin_lock_bh(&ifp
->state_lock
);
1005 ifp
->state
= INET6_IFADDR_STATE_DEAD
;
1006 spin_unlock_bh(&ifp
->state_lock
);
1008 if (state
== INET6_IFADDR_STATE_DEAD
)
1011 spin_lock_bh(&addrconf_hash_lock
);
1012 hlist_del_init_rcu(&ifp
->addr_lst
);
1013 spin_unlock_bh(&addrconf_hash_lock
);
1015 write_lock_bh(&ifp
->idev
->lock
);
1017 if (ifp
->flags
&IFA_F_TEMPORARY
) {
1018 list_del(&ifp
->tmp_list
);
1020 in6_ifa_put(ifp
->ifpub
);
1026 if (ifp
->flags
& IFA_F_PERMANENT
&& !(ifp
->flags
& IFA_F_NOPREFIXROUTE
))
1027 action
= check_cleanup_prefix_route(ifp
, &expires
);
1029 list_del_init(&ifp
->if_list
);
1032 write_unlock_bh(&ifp
->idev
->lock
);
1034 addrconf_del_dad_work(ifp
);
1036 ipv6_ifa_notify(RTM_DELADDR
, ifp
);
1038 inet6addr_notifier_call_chain(NETDEV_DOWN
, ifp
);
1040 if (action
!= CLEANUP_PREFIX_RT_NOP
) {
1041 cleanup_prefix_route(ifp
, expires
,
1042 action
== CLEANUP_PREFIX_RT_DEL
);
1045 /* clean up prefsrc entries */
1046 rt6_remove_prefsrc(ifp
);
1051 static int ipv6_create_tempaddr(struct inet6_ifaddr
*ifp
, struct inet6_ifaddr
*ift
)
1053 struct inet6_dev
*idev
= ifp
->idev
;
1054 struct in6_addr addr
, *tmpaddr
;
1055 unsigned long tmp_prefered_lft
, tmp_valid_lft
, tmp_tstamp
, age
;
1056 unsigned long regen_advance
;
1060 unsigned long now
= jiffies
;
1062 write_lock_bh(&idev
->lock
);
1064 spin_lock_bh(&ift
->lock
);
1065 memcpy(&addr
.s6_addr
[8], &ift
->addr
.s6_addr
[8], 8);
1066 spin_unlock_bh(&ift
->lock
);
1073 if (idev
->cnf
.use_tempaddr
<= 0) {
1074 write_unlock_bh(&idev
->lock
);
1075 pr_info("%s: use_tempaddr is disabled\n", __func__
);
1080 spin_lock_bh(&ifp
->lock
);
1081 if (ifp
->regen_count
++ >= idev
->cnf
.regen_max_retry
) {
1082 idev
->cnf
.use_tempaddr
= -1; /*XXX*/
1083 spin_unlock_bh(&ifp
->lock
);
1084 write_unlock_bh(&idev
->lock
);
1085 pr_warn("%s: regeneration time exceeded - disabled temporary address support\n",
1092 memcpy(addr
.s6_addr
, ifp
->addr
.s6_addr
, 8);
1093 __ipv6_try_regen_rndid(idev
, tmpaddr
);
1094 memcpy(&addr
.s6_addr
[8], idev
->rndid
, 8);
1095 age
= (now
- ifp
->tstamp
) / HZ
;
1096 tmp_valid_lft
= min_t(__u32
,
1098 idev
->cnf
.temp_valid_lft
+ age
);
1099 tmp_prefered_lft
= min_t(__u32
,
1101 idev
->cnf
.temp_prefered_lft
+ age
-
1102 idev
->cnf
.max_desync_factor
);
1103 tmp_plen
= ifp
->prefix_len
;
1104 tmp_tstamp
= ifp
->tstamp
;
1105 spin_unlock_bh(&ifp
->lock
);
1107 regen_advance
= idev
->cnf
.regen_max_retry
*
1108 idev
->cnf
.dad_transmits
*
1109 NEIGH_VAR(idev
->nd_parms
, RETRANS_TIME
) / HZ
;
1110 write_unlock_bh(&idev
->lock
);
1112 /* A temporary address is created only if this calculated Preferred
1113 * Lifetime is greater than REGEN_ADVANCE time units. In particular,
1114 * an implementation must not create a temporary address with a zero
1115 * Preferred Lifetime.
1116 * Use age calculation as in addrconf_verify to avoid unnecessary
1117 * temporary addresses being generated.
1119 age
= (now
- tmp_tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
1120 if (tmp_prefered_lft
<= regen_advance
+ age
) {
1127 addr_flags
= IFA_F_TEMPORARY
;
1128 /* set in addrconf_prefix_rcv() */
1129 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
1130 addr_flags
|= IFA_F_OPTIMISTIC
;
1132 ift
= ipv6_add_addr(idev
, &addr
, NULL
, tmp_plen
,
1133 ipv6_addr_scope(&addr
), addr_flags
,
1134 tmp_valid_lft
, tmp_prefered_lft
);
1138 pr_info("%s: retry temporary address regeneration\n", __func__
);
1140 write_lock_bh(&idev
->lock
);
1144 spin_lock_bh(&ift
->lock
);
1147 ift
->tstamp
= tmp_tstamp
;
1148 spin_unlock_bh(&ift
->lock
);
1150 addrconf_dad_start(ift
);
1158 * Choose an appropriate source address (RFC3484)
1161 IPV6_SADDR_RULE_INIT
= 0,
1162 IPV6_SADDR_RULE_LOCAL
,
1163 IPV6_SADDR_RULE_SCOPE
,
1164 IPV6_SADDR_RULE_PREFERRED
,
1165 #ifdef CONFIG_IPV6_MIP6
1166 IPV6_SADDR_RULE_HOA
,
1168 IPV6_SADDR_RULE_OIF
,
1169 IPV6_SADDR_RULE_LABEL
,
1170 IPV6_SADDR_RULE_PRIVACY
,
1171 IPV6_SADDR_RULE_ORCHID
,
1172 IPV6_SADDR_RULE_PREFIX
,
1176 struct ipv6_saddr_score
{
1179 struct inet6_ifaddr
*ifa
;
1180 DECLARE_BITMAP(scorebits
, IPV6_SADDR_RULE_MAX
);
1185 struct ipv6_saddr_dst
{
1186 const struct in6_addr
*addr
;
1193 static inline int ipv6_saddr_preferred(int type
)
1195 if (type
& (IPV6_ADDR_MAPPED
|IPV6_ADDR_COMPATv4
|IPV6_ADDR_LOOPBACK
))
1200 static int ipv6_get_saddr_eval(struct net
*net
,
1201 struct ipv6_saddr_score
*score
,
1202 struct ipv6_saddr_dst
*dst
,
1207 if (i
<= score
->rule
) {
1209 case IPV6_SADDR_RULE_SCOPE
:
1210 ret
= score
->scopedist
;
1212 case IPV6_SADDR_RULE_PREFIX
:
1213 ret
= score
->matchlen
;
1216 ret
= !!test_bit(i
, score
->scorebits
);
1222 case IPV6_SADDR_RULE_INIT
:
1223 /* Rule 0: remember if hiscore is not ready yet */
1226 case IPV6_SADDR_RULE_LOCAL
:
1227 /* Rule 1: Prefer same address */
1228 ret
= ipv6_addr_equal(&score
->ifa
->addr
, dst
->addr
);
1230 case IPV6_SADDR_RULE_SCOPE
:
1231 /* Rule 2: Prefer appropriate scope
1236 * ---+--+-+---> scope
1238 * | d is scope of the destination.
1240 * | \ <- smaller scope is better if
1241 * B-15 | \ if scope is enough for destination.
1242 * | ret = B - scope (-1 <= scope >= d <= 15).
1244 * |/ <- greater is better
1245 * -C / if scope is not enough for destination.
1246 * /| ret = scope - C (-1 <= d < scope <= 15).
1248 * d - C - 1 < B -15 (for all -1 <= d <= 15).
1249 * C > d + 14 - B >= 15 + 14 - B = 29 - B.
1250 * Assume B = 0 and we get C > 29.
1252 ret
= __ipv6_addr_src_scope(score
->addr_type
);
1253 if (ret
>= dst
->scope
)
1256 ret
-= 128; /* 30 is enough */
1257 score
->scopedist
= ret
;
1259 case IPV6_SADDR_RULE_PREFERRED
:
1260 /* Rule 3: Avoid deprecated and optimistic addresses */
1261 ret
= ipv6_saddr_preferred(score
->addr_type
) ||
1262 !(score
->ifa
->flags
& (IFA_F_DEPRECATED
|IFA_F_OPTIMISTIC
));
1264 #ifdef CONFIG_IPV6_MIP6
1265 case IPV6_SADDR_RULE_HOA
:
1267 /* Rule 4: Prefer home address */
1268 int prefhome
= !(dst
->prefs
& IPV6_PREFER_SRC_COA
);
1269 ret
= !(score
->ifa
->flags
& IFA_F_HOMEADDRESS
) ^ prefhome
;
1273 case IPV6_SADDR_RULE_OIF
:
1274 /* Rule 5: Prefer outgoing interface */
1275 ret
= (!dst
->ifindex
||
1276 dst
->ifindex
== score
->ifa
->idev
->dev
->ifindex
);
1278 case IPV6_SADDR_RULE_LABEL
:
1279 /* Rule 6: Prefer matching label */
1280 ret
= ipv6_addr_label(net
,
1281 &score
->ifa
->addr
, score
->addr_type
,
1282 score
->ifa
->idev
->dev
->ifindex
) == dst
->label
;
1284 case IPV6_SADDR_RULE_PRIVACY
:
1286 /* Rule 7: Prefer public address
1287 * Note: prefer temporary address if use_tempaddr >= 2
1289 int preftmp
= dst
->prefs
& (IPV6_PREFER_SRC_PUBLIC
|IPV6_PREFER_SRC_TMP
) ?
1290 !!(dst
->prefs
& IPV6_PREFER_SRC_TMP
) :
1291 score
->ifa
->idev
->cnf
.use_tempaddr
>= 2;
1292 ret
= (!(score
->ifa
->flags
& IFA_F_TEMPORARY
)) ^ preftmp
;
1295 case IPV6_SADDR_RULE_ORCHID
:
1296 /* Rule 8-: Prefer ORCHID vs ORCHID or
1297 * non-ORCHID vs non-ORCHID
1299 ret
= !(ipv6_addr_orchid(&score
->ifa
->addr
) ^
1300 ipv6_addr_orchid(dst
->addr
));
1302 case IPV6_SADDR_RULE_PREFIX
:
1303 /* Rule 8: Use longest matching prefix */
1304 ret
= ipv6_addr_diff(&score
->ifa
->addr
, dst
->addr
);
1305 if (ret
> score
->ifa
->prefix_len
)
1306 ret
= score
->ifa
->prefix_len
;
1307 score
->matchlen
= ret
;
1314 __set_bit(i
, score
->scorebits
);
1320 int ipv6_dev_get_saddr(struct net
*net
, const struct net_device
*dst_dev
,
1321 const struct in6_addr
*daddr
, unsigned int prefs
,
1322 struct in6_addr
*saddr
)
1324 struct ipv6_saddr_score scores
[2],
1325 *score
= &scores
[0], *hiscore
= &scores
[1];
1326 struct ipv6_saddr_dst dst
;
1327 struct net_device
*dev
;
1330 dst_type
= __ipv6_addr_type(daddr
);
1332 dst
.ifindex
= dst_dev
? dst_dev
->ifindex
: 0;
1333 dst
.scope
= __ipv6_addr_src_scope(dst_type
);
1334 dst
.label
= ipv6_addr_label(net
, daddr
, dst_type
, dst
.ifindex
);
1338 hiscore
->ifa
= NULL
;
1342 for_each_netdev_rcu(net
, dev
) {
1343 struct inet6_dev
*idev
;
1345 /* Candidate Source Address (section 4)
1346 * - multicast and link-local destination address,
1347 * the set of candidate source address MUST only
1348 * include addresses assigned to interfaces
1349 * belonging to the same link as the outgoing
1351 * (- For site-local destination addresses, the
1352 * set of candidate source addresses MUST only
1353 * include addresses assigned to interfaces
1354 * belonging to the same site as the outgoing
1357 if (((dst_type
& IPV6_ADDR_MULTICAST
) ||
1358 dst
.scope
<= IPV6_ADDR_SCOPE_LINKLOCAL
) &&
1359 dst
.ifindex
&& dev
->ifindex
!= dst
.ifindex
)
1362 idev
= __in6_dev_get(dev
);
1366 read_lock_bh(&idev
->lock
);
1367 list_for_each_entry(score
->ifa
, &idev
->addr_list
, if_list
) {
1371 * - Tentative Address (RFC2462 section 5.4)
1372 * - A tentative address is not considered
1373 * "assigned to an interface" in the traditional
1374 * sense, unless it is also flagged as optimistic.
1375 * - Candidate Source Address (section 4)
1376 * - In any case, anycast addresses, multicast
1377 * addresses, and the unspecified address MUST
1378 * NOT be included in a candidate set.
1380 if ((score
->ifa
->flags
& IFA_F_TENTATIVE
) &&
1381 (!(score
->ifa
->flags
& IFA_F_OPTIMISTIC
)))
1384 score
->addr_type
= __ipv6_addr_type(&score
->ifa
->addr
);
1386 if (unlikely(score
->addr_type
== IPV6_ADDR_ANY
||
1387 score
->addr_type
& IPV6_ADDR_MULTICAST
)) {
1388 LIMIT_NETDEBUG(KERN_DEBUG
1389 "ADDRCONF: unspecified / multicast address "
1390 "assigned as unicast address on %s",
1396 bitmap_zero(score
->scorebits
, IPV6_SADDR_RULE_MAX
);
1398 for (i
= 0; i
< IPV6_SADDR_RULE_MAX
; i
++) {
1399 int minihiscore
, miniscore
;
1401 minihiscore
= ipv6_get_saddr_eval(net
, hiscore
, &dst
, i
);
1402 miniscore
= ipv6_get_saddr_eval(net
, score
, &dst
, i
);
1404 if (minihiscore
> miniscore
) {
1405 if (i
== IPV6_SADDR_RULE_SCOPE
&&
1406 score
->scopedist
> 0) {
1409 * each remaining entry
1410 * has too small (not enough)
1411 * scope, because ifa entries
1412 * are sorted by their scope
1418 } else if (minihiscore
< miniscore
) {
1420 in6_ifa_put(hiscore
->ifa
);
1422 in6_ifa_hold(score
->ifa
);
1424 swap(hiscore
, score
);
1426 /* restore our iterator */
1427 score
->ifa
= hiscore
->ifa
;
1434 read_unlock_bh(&idev
->lock
);
1439 return -EADDRNOTAVAIL
;
1441 *saddr
= hiscore
->ifa
->addr
;
1442 in6_ifa_put(hiscore
->ifa
);
1445 EXPORT_SYMBOL(ipv6_dev_get_saddr
);
1447 int __ipv6_get_lladdr(struct inet6_dev
*idev
, struct in6_addr
*addr
,
1450 struct inet6_ifaddr
*ifp
;
1451 int err
= -EADDRNOTAVAIL
;
1453 list_for_each_entry_reverse(ifp
, &idev
->addr_list
, if_list
) {
1454 if (ifp
->scope
> IFA_LINK
)
1456 if (ifp
->scope
== IFA_LINK
&&
1457 !(ifp
->flags
& banned_flags
)) {
1466 int ipv6_get_lladdr(struct net_device
*dev
, struct in6_addr
*addr
,
1469 struct inet6_dev
*idev
;
1470 int err
= -EADDRNOTAVAIL
;
1473 idev
= __in6_dev_get(dev
);
1475 read_lock_bh(&idev
->lock
);
1476 err
= __ipv6_get_lladdr(idev
, addr
, banned_flags
);
1477 read_unlock_bh(&idev
->lock
);
1483 static int ipv6_count_addresses(struct inet6_dev
*idev
)
1486 struct inet6_ifaddr
*ifp
;
1488 read_lock_bh(&idev
->lock
);
1489 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
)
1491 read_unlock_bh(&idev
->lock
);
1495 int ipv6_chk_addr(struct net
*net
, const struct in6_addr
*addr
,
1496 const struct net_device
*dev
, int strict
)
1498 struct inet6_ifaddr
*ifp
;
1499 unsigned int hash
= inet6_addr_hash(addr
);
1502 hlist_for_each_entry_rcu(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
1503 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1505 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
1506 !(ifp
->flags
&IFA_F_TENTATIVE
) &&
1507 (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1508 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
))) {
1509 rcu_read_unlock_bh();
1514 rcu_read_unlock_bh();
1517 EXPORT_SYMBOL(ipv6_chk_addr
);
1519 static bool ipv6_chk_same_addr(struct net
*net
, const struct in6_addr
*addr
,
1520 struct net_device
*dev
)
1522 unsigned int hash
= inet6_addr_hash(addr
);
1523 struct inet6_ifaddr
*ifp
;
1525 hlist_for_each_entry(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
1526 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1528 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1529 if (dev
== NULL
|| ifp
->idev
->dev
== dev
)
1536 /* Compares an address/prefix_len with addresses on device @dev.
1537 * If one is found it returns true.
1539 bool ipv6_chk_custom_prefix(const struct in6_addr
*addr
,
1540 const unsigned int prefix_len
, struct net_device
*dev
)
1542 struct inet6_dev
*idev
;
1543 struct inet6_ifaddr
*ifa
;
1547 idev
= __in6_dev_get(dev
);
1549 read_lock_bh(&idev
->lock
);
1550 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
1551 ret
= ipv6_prefix_equal(addr
, &ifa
->addr
, prefix_len
);
1555 read_unlock_bh(&idev
->lock
);
1561 EXPORT_SYMBOL(ipv6_chk_custom_prefix
);
1563 int ipv6_chk_prefix(const struct in6_addr
*addr
, struct net_device
*dev
)
1565 struct inet6_dev
*idev
;
1566 struct inet6_ifaddr
*ifa
;
1571 idev
= __in6_dev_get(dev
);
1573 read_lock_bh(&idev
->lock
);
1574 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
1575 onlink
= ipv6_prefix_equal(addr
, &ifa
->addr
,
1580 read_unlock_bh(&idev
->lock
);
1585 EXPORT_SYMBOL(ipv6_chk_prefix
);
1587 struct inet6_ifaddr
*ipv6_get_ifaddr(struct net
*net
, const struct in6_addr
*addr
,
1588 struct net_device
*dev
, int strict
)
1590 struct inet6_ifaddr
*ifp
, *result
= NULL
;
1591 unsigned int hash
= inet6_addr_hash(addr
);
1594 hlist_for_each_entry_rcu_bh(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
1595 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
1597 if (ipv6_addr_equal(&ifp
->addr
, addr
)) {
1598 if (dev
== NULL
|| ifp
->idev
->dev
== dev
||
1599 !(ifp
->scope
&(IFA_LINK
|IFA_HOST
) || strict
)) {
1606 rcu_read_unlock_bh();
1611 /* Gets referenced address, destroys ifaddr */
1613 static void addrconf_dad_stop(struct inet6_ifaddr
*ifp
, int dad_failed
)
1615 if (ifp
->flags
&IFA_F_PERMANENT
) {
1616 spin_lock_bh(&ifp
->lock
);
1617 addrconf_del_dad_work(ifp
);
1618 ifp
->flags
|= IFA_F_TENTATIVE
;
1620 ifp
->flags
|= IFA_F_DADFAILED
;
1621 spin_unlock_bh(&ifp
->lock
);
1623 ipv6_ifa_notify(0, ifp
);
1625 } else if (ifp
->flags
&IFA_F_TEMPORARY
) {
1626 struct inet6_ifaddr
*ifpub
;
1627 spin_lock_bh(&ifp
->lock
);
1630 in6_ifa_hold(ifpub
);
1631 spin_unlock_bh(&ifp
->lock
);
1632 ipv6_create_tempaddr(ifpub
, ifp
);
1635 spin_unlock_bh(&ifp
->lock
);
1643 static int addrconf_dad_end(struct inet6_ifaddr
*ifp
)
1647 spin_lock_bh(&ifp
->state_lock
);
1648 if (ifp
->state
== INET6_IFADDR_STATE_DAD
) {
1649 ifp
->state
= INET6_IFADDR_STATE_POSTDAD
;
1652 spin_unlock_bh(&ifp
->state_lock
);
1657 void addrconf_dad_failure(struct inet6_ifaddr
*ifp
)
1659 struct inet6_dev
*idev
= ifp
->idev
;
1661 if (addrconf_dad_end(ifp
)) {
1666 net_info_ratelimited("%s: IPv6 duplicate address %pI6c detected!\n",
1667 ifp
->idev
->dev
->name
, &ifp
->addr
);
1669 if (idev
->cnf
.accept_dad
> 1 && !idev
->cnf
.disable_ipv6
) {
1670 struct in6_addr addr
;
1672 addr
.s6_addr32
[0] = htonl(0xfe800000);
1673 addr
.s6_addr32
[1] = 0;
1675 if (!ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) &&
1676 ipv6_addr_equal(&ifp
->addr
, &addr
)) {
1677 /* DAD failed for link-local based on MAC address */
1678 idev
->cnf
.disable_ipv6
= 1;
1680 pr_info("%s: IPv6 being disabled!\n",
1681 ifp
->idev
->dev
->name
);
1685 spin_lock_bh(&ifp
->state_lock
);
1686 /* transition from _POSTDAD to _ERRDAD */
1687 ifp
->state
= INET6_IFADDR_STATE_ERRDAD
;
1688 spin_unlock_bh(&ifp
->state_lock
);
1690 addrconf_mod_dad_work(ifp
, 0);
1693 /* Join to solicited addr multicast group.
1694 * caller must hold RTNL */
1695 void addrconf_join_solict(struct net_device
*dev
, const struct in6_addr
*addr
)
1697 struct in6_addr maddr
;
1699 if (dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1702 addrconf_addr_solict_mult(addr
, &maddr
);
1703 ipv6_dev_mc_inc(dev
, &maddr
);
1706 /* caller must hold RTNL */
1707 void addrconf_leave_solict(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
1709 struct in6_addr maddr
;
1711 if (idev
->dev
->flags
&(IFF_LOOPBACK
|IFF_NOARP
))
1714 addrconf_addr_solict_mult(addr
, &maddr
);
1715 __ipv6_dev_mc_dec(idev
, &maddr
);
1718 /* caller must hold RTNL */
1719 static void addrconf_join_anycast(struct inet6_ifaddr
*ifp
)
1721 struct in6_addr addr
;
1723 if (ifp
->prefix_len
>= 127) /* RFC 6164 */
1725 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1726 if (ipv6_addr_any(&addr
))
1728 __ipv6_dev_ac_inc(ifp
->idev
, &addr
);
1731 /* caller must hold RTNL */
1732 static void addrconf_leave_anycast(struct inet6_ifaddr
*ifp
)
1734 struct in6_addr addr
;
1736 if (ifp
->prefix_len
>= 127) /* RFC 6164 */
1738 ipv6_addr_prefix(&addr
, &ifp
->addr
, ifp
->prefix_len
);
1739 if (ipv6_addr_any(&addr
))
1741 __ipv6_dev_ac_dec(ifp
->idev
, &addr
);
1744 static int addrconf_ifid_eui48(u8
*eui
, struct net_device
*dev
)
1746 if (dev
->addr_len
!= ETH_ALEN
)
1748 memcpy(eui
, dev
->dev_addr
, 3);
1749 memcpy(eui
+ 5, dev
->dev_addr
+ 3, 3);
1752 * The zSeries OSA network cards can be shared among various
1753 * OS instances, but the OSA cards have only one MAC address.
1754 * This leads to duplicate address conflicts in conjunction
1755 * with IPv6 if more than one instance uses the same card.
1757 * The driver for these cards can deliver a unique 16-bit
1758 * identifier for each instance sharing the same card. It is
1759 * placed instead of 0xFFFE in the interface identifier. The
1760 * "u" bit of the interface identifier is not inverted in this
1761 * case. Hence the resulting interface identifier has local
1762 * scope according to RFC2373.
1765 eui
[3] = (dev
->dev_id
>> 8) & 0xFF;
1766 eui
[4] = dev
->dev_id
& 0xFF;
1775 static int addrconf_ifid_eui64(u8
*eui
, struct net_device
*dev
)
1777 if (dev
->addr_len
!= IEEE802154_ADDR_LEN
)
1779 memcpy(eui
, dev
->dev_addr
, 8);
1784 static int addrconf_ifid_ieee1394(u8
*eui
, struct net_device
*dev
)
1786 union fwnet_hwaddr
*ha
;
1788 if (dev
->addr_len
!= FWNET_ALEN
)
1791 ha
= (union fwnet_hwaddr
*)dev
->dev_addr
;
1793 memcpy(eui
, &ha
->uc
.uniq_id
, sizeof(ha
->uc
.uniq_id
));
1798 static int addrconf_ifid_arcnet(u8
*eui
, struct net_device
*dev
)
1800 /* XXX: inherit EUI-64 from other interface -- yoshfuji */
1801 if (dev
->addr_len
!= ARCNET_ALEN
)
1804 eui
[7] = *(u8
*)dev
->dev_addr
;
1808 static int addrconf_ifid_infiniband(u8
*eui
, struct net_device
*dev
)
1810 if (dev
->addr_len
!= INFINIBAND_ALEN
)
1812 memcpy(eui
, dev
->dev_addr
+ 12, 8);
1817 static int __ipv6_isatap_ifid(u8
*eui
, __be32 addr
)
1821 eui
[0] = (ipv4_is_zeronet(addr
) || ipv4_is_private_10(addr
) ||
1822 ipv4_is_loopback(addr
) || ipv4_is_linklocal_169(addr
) ||
1823 ipv4_is_private_172(addr
) || ipv4_is_test_192(addr
) ||
1824 ipv4_is_anycast_6to4(addr
) || ipv4_is_private_192(addr
) ||
1825 ipv4_is_test_198(addr
) || ipv4_is_multicast(addr
) ||
1826 ipv4_is_lbcast(addr
)) ? 0x00 : 0x02;
1830 memcpy(eui
+ 4, &addr
, 4);
1834 static int addrconf_ifid_sit(u8
*eui
, struct net_device
*dev
)
1836 if (dev
->priv_flags
& IFF_ISATAP
)
1837 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
1841 static int addrconf_ifid_gre(u8
*eui
, struct net_device
*dev
)
1843 return __ipv6_isatap_ifid(eui
, *(__be32
*)dev
->dev_addr
);
1846 static int addrconf_ifid_ip6tnl(u8
*eui
, struct net_device
*dev
)
1848 memcpy(eui
, dev
->perm_addr
, 3);
1849 memcpy(eui
+ 5, dev
->perm_addr
+ 3, 3);
1856 static int ipv6_generate_eui64(u8
*eui
, struct net_device
*dev
)
1858 switch (dev
->type
) {
1861 return addrconf_ifid_eui48(eui
, dev
);
1863 return addrconf_ifid_arcnet(eui
, dev
);
1864 case ARPHRD_INFINIBAND
:
1865 return addrconf_ifid_infiniband(eui
, dev
);
1867 return addrconf_ifid_sit(eui
, dev
);
1869 return addrconf_ifid_gre(eui
, dev
);
1870 case ARPHRD_6LOWPAN
:
1871 case ARPHRD_IEEE802154
:
1872 return addrconf_ifid_eui64(eui
, dev
);
1873 case ARPHRD_IEEE1394
:
1874 return addrconf_ifid_ieee1394(eui
, dev
);
1875 case ARPHRD_TUNNEL6
:
1876 return addrconf_ifid_ip6tnl(eui
, dev
);
1881 static int ipv6_inherit_eui64(u8
*eui
, struct inet6_dev
*idev
)
1884 struct inet6_ifaddr
*ifp
;
1886 read_lock_bh(&idev
->lock
);
1887 list_for_each_entry_reverse(ifp
, &idev
->addr_list
, if_list
) {
1888 if (ifp
->scope
> IFA_LINK
)
1890 if (ifp
->scope
== IFA_LINK
&& !(ifp
->flags
&IFA_F_TENTATIVE
)) {
1891 memcpy(eui
, ifp
->addr
.s6_addr
+8, 8);
1896 read_unlock_bh(&idev
->lock
);
1900 /* (re)generation of randomized interface identifier (RFC 3041 3.2, 3.5) */
1901 static void __ipv6_regen_rndid(struct inet6_dev
*idev
)
1904 get_random_bytes(idev
->rndid
, sizeof(idev
->rndid
));
1905 idev
->rndid
[0] &= ~0x02;
1908 * <draft-ietf-ipngwg-temp-addresses-v2-00.txt>:
1909 * check if generated address is not inappropriate
1911 * - Reserved subnet anycast (RFC 2526)
1912 * 11111101 11....11 1xxxxxxx
1913 * - ISATAP (RFC4214) 6.1
1914 * 00-00-5E-FE-xx-xx-xx-xx
1916 * - XXX: already assigned to an address on the device
1918 if (idev
->rndid
[0] == 0xfd &&
1919 (idev
->rndid
[1]&idev
->rndid
[2]&idev
->rndid
[3]&idev
->rndid
[4]&idev
->rndid
[5]&idev
->rndid
[6]) == 0xff &&
1920 (idev
->rndid
[7]&0x80))
1922 if ((idev
->rndid
[0]|idev
->rndid
[1]) == 0) {
1923 if (idev
->rndid
[2] == 0x5e && idev
->rndid
[3] == 0xfe)
1925 if ((idev
->rndid
[2]|idev
->rndid
[3]|idev
->rndid
[4]|idev
->rndid
[5]|idev
->rndid
[6]|idev
->rndid
[7]) == 0x00)
1930 static void ipv6_regen_rndid(unsigned long data
)
1932 struct inet6_dev
*idev
= (struct inet6_dev
*) data
;
1933 unsigned long expires
;
1936 write_lock_bh(&idev
->lock
);
1941 __ipv6_regen_rndid(idev
);
1944 idev
->cnf
.temp_prefered_lft
* HZ
-
1945 idev
->cnf
.regen_max_retry
* idev
->cnf
.dad_transmits
*
1946 NEIGH_VAR(idev
->nd_parms
, RETRANS_TIME
) -
1947 idev
->cnf
.max_desync_factor
* HZ
;
1948 if (time_before(expires
, jiffies
)) {
1949 pr_warn("%s: too short regeneration interval; timer disabled for %s\n",
1950 __func__
, idev
->dev
->name
);
1954 if (!mod_timer(&idev
->regen_timer
, expires
))
1958 write_unlock_bh(&idev
->lock
);
1959 rcu_read_unlock_bh();
1963 static void __ipv6_try_regen_rndid(struct inet6_dev
*idev
, struct in6_addr
*tmpaddr
)
1965 if (tmpaddr
&& memcmp(idev
->rndid
, &tmpaddr
->s6_addr
[8], 8) == 0)
1966 __ipv6_regen_rndid(idev
);
1974 addrconf_prefix_route(struct in6_addr
*pfx
, int plen
, struct net_device
*dev
,
1975 unsigned long expires
, u32 flags
)
1977 struct fib6_config cfg
= {
1978 .fc_table
= RT6_TABLE_PREFIX
,
1979 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
1980 .fc_ifindex
= dev
->ifindex
,
1981 .fc_expires
= expires
,
1983 .fc_flags
= RTF_UP
| flags
,
1984 .fc_nlinfo
.nl_net
= dev_net(dev
),
1985 .fc_protocol
= RTPROT_KERNEL
,
1990 /* Prevent useless cloning on PtP SIT.
1991 This thing is done here expecting that the whole
1992 class of non-broadcast devices need not cloning.
1994 #if IS_ENABLED(CONFIG_IPV6_SIT)
1995 if (dev
->type
== ARPHRD_SIT
&& (dev
->flags
& IFF_POINTOPOINT
))
1996 cfg
.fc_flags
|= RTF_NONEXTHOP
;
1999 ip6_route_add(&cfg
);
2003 static struct rt6_info
*addrconf_get_prefix_route(const struct in6_addr
*pfx
,
2005 const struct net_device
*dev
,
2006 u32 flags
, u32 noflags
)
2008 struct fib6_node
*fn
;
2009 struct rt6_info
*rt
= NULL
;
2010 struct fib6_table
*table
;
2012 table
= fib6_get_table(dev_net(dev
), RT6_TABLE_PREFIX
);
2016 read_lock_bh(&table
->tb6_lock
);
2017 fn
= fib6_locate(&table
->tb6_root
, pfx
, plen
, NULL
, 0);
2020 for (rt
= fn
->leaf
; rt
; rt
= rt
->dst
.rt6_next
) {
2021 if (rt
->dst
.dev
->ifindex
!= dev
->ifindex
)
2023 if ((rt
->rt6i_flags
& flags
) != flags
)
2025 if ((rt
->rt6i_flags
& noflags
) != 0)
2031 read_unlock_bh(&table
->tb6_lock
);
2036 /* Create "default" multicast route to the interface */
2038 static void addrconf_add_mroute(struct net_device
*dev
)
2040 struct fib6_config cfg
= {
2041 .fc_table
= RT6_TABLE_LOCAL
,
2042 .fc_metric
= IP6_RT_PRIO_ADDRCONF
,
2043 .fc_ifindex
= dev
->ifindex
,
2046 .fc_nlinfo
.nl_net
= dev_net(dev
),
2049 ipv6_addr_set(&cfg
.fc_dst
, htonl(0xFF000000), 0, 0, 0);
2051 ip6_route_add(&cfg
);
2054 static struct inet6_dev
*addrconf_add_dev(struct net_device
*dev
)
2056 struct inet6_dev
*idev
;
2060 idev
= ipv6_find_idev(dev
);
2062 return ERR_PTR(-ENOBUFS
);
2064 if (idev
->cnf
.disable_ipv6
)
2065 return ERR_PTR(-EACCES
);
2067 /* Add default multicast route */
2068 if (!(dev
->flags
& IFF_LOOPBACK
))
2069 addrconf_add_mroute(dev
);
2074 static void manage_tempaddrs(struct inet6_dev
*idev
,
2075 struct inet6_ifaddr
*ifp
,
2076 __u32 valid_lft
, __u32 prefered_lft
,
2077 bool create
, unsigned long now
)
2080 struct inet6_ifaddr
*ift
;
2082 read_lock_bh(&idev
->lock
);
2083 /* update all temporary addresses in the list */
2084 list_for_each_entry(ift
, &idev
->tempaddr_list
, tmp_list
) {
2085 int age
, max_valid
, max_prefered
;
2087 if (ifp
!= ift
->ifpub
)
2090 /* RFC 4941 section 3.3:
2091 * If a received option will extend the lifetime of a public
2092 * address, the lifetimes of temporary addresses should
2093 * be extended, subject to the overall constraint that no
2094 * temporary addresses should ever remain "valid" or "preferred"
2095 * for a time longer than (TEMP_VALID_LIFETIME) or
2096 * (TEMP_PREFERRED_LIFETIME - DESYNC_FACTOR), respectively.
2098 age
= (now
- ift
->cstamp
) / HZ
;
2099 max_valid
= idev
->cnf
.temp_valid_lft
- age
;
2103 max_prefered
= idev
->cnf
.temp_prefered_lft
-
2104 idev
->cnf
.max_desync_factor
- age
;
2105 if (max_prefered
< 0)
2108 if (valid_lft
> max_valid
)
2109 valid_lft
= max_valid
;
2111 if (prefered_lft
> max_prefered
)
2112 prefered_lft
= max_prefered
;
2114 spin_lock(&ift
->lock
);
2116 ift
->valid_lft
= valid_lft
;
2117 ift
->prefered_lft
= prefered_lft
;
2119 if (prefered_lft
> 0)
2120 ift
->flags
&= ~IFA_F_DEPRECATED
;
2122 spin_unlock(&ift
->lock
);
2123 if (!(flags
&IFA_F_TENTATIVE
))
2124 ipv6_ifa_notify(0, ift
);
2127 if ((create
|| list_empty(&idev
->tempaddr_list
)) &&
2128 idev
->cnf
.use_tempaddr
> 0) {
2129 /* When a new public address is created as described
2130 * in [ADDRCONF], also create a new temporary address.
2131 * Also create a temporary address if it's enabled but
2132 * no temporary address currently exists.
2134 read_unlock_bh(&idev
->lock
);
2135 ipv6_create_tempaddr(ifp
, NULL
);
2137 read_unlock_bh(&idev
->lock
);
2141 void addrconf_prefix_rcv(struct net_device
*dev
, u8
*opt
, int len
, bool sllao
)
2143 struct prefix_info
*pinfo
;
2147 struct inet6_dev
*in6_dev
;
2148 struct net
*net
= dev_net(dev
);
2150 pinfo
= (struct prefix_info
*) opt
;
2152 if (len
< sizeof(struct prefix_info
)) {
2153 ADBG("addrconf: prefix option too short\n");
2158 * Validation checks ([ADDRCONF], page 19)
2161 addr_type
= ipv6_addr_type(&pinfo
->prefix
);
2163 if (addr_type
& (IPV6_ADDR_MULTICAST
|IPV6_ADDR_LINKLOCAL
))
2166 valid_lft
= ntohl(pinfo
->valid
);
2167 prefered_lft
= ntohl(pinfo
->prefered
);
2169 if (prefered_lft
> valid_lft
) {
2170 net_warn_ratelimited("addrconf: prefix option has invalid lifetime\n");
2174 in6_dev
= in6_dev_get(dev
);
2176 if (in6_dev
== NULL
) {
2177 net_dbg_ratelimited("addrconf: device %s not configured\n",
2183 * Two things going on here:
2184 * 1) Add routes for on-link prefixes
2185 * 2) Configure prefixes with the auto flag set
2188 if (pinfo
->onlink
) {
2189 struct rt6_info
*rt
;
2190 unsigned long rt_expires
;
2192 /* Avoid arithmetic overflow. Really, we could
2193 * save rt_expires in seconds, likely valid_lft,
2194 * but it would require division in fib gc, that it
2198 rt_expires
= addrconf_timeout_fixup(valid_lft
, HZ
);
2200 rt_expires
= addrconf_timeout_fixup(valid_lft
, USER_HZ
);
2202 if (addrconf_finite_timeout(rt_expires
))
2205 rt
= addrconf_get_prefix_route(&pinfo
->prefix
,
2208 RTF_ADDRCONF
| RTF_PREFIX_RT
,
2209 RTF_GATEWAY
| RTF_DEFAULT
);
2212 /* Autoconf prefix route */
2213 if (valid_lft
== 0) {
2216 } else if (addrconf_finite_timeout(rt_expires
)) {
2218 rt6_set_expires(rt
, jiffies
+ rt_expires
);
2220 rt6_clean_expires(rt
);
2222 } else if (valid_lft
) {
2223 clock_t expires
= 0;
2224 int flags
= RTF_ADDRCONF
| RTF_PREFIX_RT
;
2225 if (addrconf_finite_timeout(rt_expires
)) {
2227 flags
|= RTF_EXPIRES
;
2228 expires
= jiffies_to_clock_t(rt_expires
);
2230 addrconf_prefix_route(&pinfo
->prefix
, pinfo
->prefix_len
,
2231 dev
, expires
, flags
);
2236 /* Try to figure out our local address for this prefix */
2238 if (pinfo
->autoconf
&& in6_dev
->cnf
.autoconf
) {
2239 struct inet6_ifaddr
*ifp
;
2240 struct in6_addr addr
;
2241 int create
= 0, update_lft
= 0;
2242 bool tokenized
= false;
2244 if (pinfo
->prefix_len
== 64) {
2245 memcpy(&addr
, &pinfo
->prefix
, 8);
2247 if (!ipv6_addr_any(&in6_dev
->token
)) {
2248 read_lock_bh(&in6_dev
->lock
);
2249 memcpy(addr
.s6_addr
+ 8,
2250 in6_dev
->token
.s6_addr
+ 8, 8);
2251 read_unlock_bh(&in6_dev
->lock
);
2253 } else if (ipv6_generate_eui64(addr
.s6_addr
+ 8, dev
) &&
2254 ipv6_inherit_eui64(addr
.s6_addr
+ 8, in6_dev
)) {
2255 in6_dev_put(in6_dev
);
2260 net_dbg_ratelimited("IPv6 addrconf: prefix with wrong length %d\n",
2262 in6_dev_put(in6_dev
);
2267 ifp
= ipv6_get_ifaddr(net
, &addr
, dev
, 1);
2269 if (ifp
== NULL
&& valid_lft
) {
2270 int max_addresses
= in6_dev
->cnf
.max_addresses
;
2273 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2274 if (in6_dev
->cnf
.optimistic_dad
&&
2275 !net
->ipv6
.devconf_all
->forwarding
&& sllao
)
2276 addr_flags
= IFA_F_OPTIMISTIC
;
2279 /* Do not allow to create too much of autoconfigured
2280 * addresses; this would be too easy way to crash kernel.
2282 if (!max_addresses
||
2283 ipv6_count_addresses(in6_dev
) < max_addresses
)
2284 ifp
= ipv6_add_addr(in6_dev
, &addr
, NULL
,
2286 addr_type
&IPV6_ADDR_SCOPE_MASK
,
2287 addr_flags
, valid_lft
,
2290 if (IS_ERR_OR_NULL(ifp
)) {
2291 in6_dev_put(in6_dev
);
2297 spin_lock_bh(&ifp
->lock
);
2298 ifp
->flags
|= IFA_F_MANAGETEMPADDR
;
2299 ifp
->cstamp
= jiffies
;
2300 ifp
->tokenized
= tokenized
;
2301 spin_unlock_bh(&ifp
->lock
);
2302 addrconf_dad_start(ifp
);
2310 /* update lifetime (RFC2462 5.5.3 e) */
2311 spin_lock(&ifp
->lock
);
2313 if (ifp
->valid_lft
> (now
- ifp
->tstamp
) / HZ
)
2314 stored_lft
= ifp
->valid_lft
- (now
- ifp
->tstamp
) / HZ
;
2317 if (!update_lft
&& !create
&& stored_lft
) {
2318 const u32 minimum_lft
= min(
2319 stored_lft
, (u32
)MIN_VALID_LIFETIME
);
2320 valid_lft
= max(valid_lft
, minimum_lft
);
2322 /* RFC4862 Section 5.5.3e:
2323 * "Note that the preferred lifetime of the
2324 * corresponding address is always reset to
2325 * the Preferred Lifetime in the received
2326 * Prefix Information option, regardless of
2327 * whether the valid lifetime is also reset or
2330 * So we should always update prefered_lft here.
2336 ifp
->valid_lft
= valid_lft
;
2337 ifp
->prefered_lft
= prefered_lft
;
2340 ifp
->flags
&= ~IFA_F_DEPRECATED
;
2341 spin_unlock(&ifp
->lock
);
2343 if (!(flags
&IFA_F_TENTATIVE
))
2344 ipv6_ifa_notify(0, ifp
);
2346 spin_unlock(&ifp
->lock
);
2348 manage_tempaddrs(in6_dev
, ifp
, valid_lft
, prefered_lft
,
2355 inet6_prefix_notify(RTM_NEWPREFIX
, in6_dev
, pinfo
);
2356 in6_dev_put(in6_dev
);
2360 * Set destination address.
2361 * Special case for SIT interfaces where we create a new "virtual"
2364 int addrconf_set_dstaddr(struct net
*net
, void __user
*arg
)
2366 struct in6_ifreq ireq
;
2367 struct net_device
*dev
;
2373 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2376 dev
= __dev_get_by_index(net
, ireq
.ifr6_ifindex
);
2382 #if IS_ENABLED(CONFIG_IPV6_SIT)
2383 if (dev
->type
== ARPHRD_SIT
) {
2384 const struct net_device_ops
*ops
= dev
->netdev_ops
;
2386 struct ip_tunnel_parm p
;
2388 err
= -EADDRNOTAVAIL
;
2389 if (!(ipv6_addr_type(&ireq
.ifr6_addr
) & IPV6_ADDR_COMPATv4
))
2392 memset(&p
, 0, sizeof(p
));
2393 p
.iph
.daddr
= ireq
.ifr6_addr
.s6_addr32
[3];
2397 p
.iph
.protocol
= IPPROTO_IPV6
;
2399 ifr
.ifr_ifru
.ifru_data
= (__force
void __user
*)&p
;
2401 if (ops
->ndo_do_ioctl
) {
2402 mm_segment_t oldfs
= get_fs();
2405 err
= ops
->ndo_do_ioctl(dev
, &ifr
, SIOCADDTUNNEL
);
2412 dev
= __dev_get_by_name(net
, p
.name
);
2415 err
= dev_open(dev
);
2426 * Manual configuration of address on an interface
2428 static int inet6_addr_add(struct net
*net
, int ifindex
,
2429 const struct in6_addr
*pfx
,
2430 const struct in6_addr
*peer_pfx
,
2431 unsigned int plen
, __u32 ifa_flags
,
2432 __u32 prefered_lft
, __u32 valid_lft
)
2434 struct inet6_ifaddr
*ifp
;
2435 struct inet6_dev
*idev
;
2436 struct net_device
*dev
;
2440 unsigned long timeout
;
2447 /* check the lifetime */
2448 if (!valid_lft
|| prefered_lft
> valid_lft
)
2451 if (ifa_flags
& IFA_F_MANAGETEMPADDR
&& plen
!= 64)
2454 dev
= __dev_get_by_index(net
, ifindex
);
2458 idev
= addrconf_add_dev(dev
);
2460 return PTR_ERR(idev
);
2462 scope
= ipv6_addr_scope(pfx
);
2464 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
2465 if (addrconf_finite_timeout(timeout
)) {
2466 expires
= jiffies_to_clock_t(timeout
* HZ
);
2467 valid_lft
= timeout
;
2468 flags
= RTF_EXPIRES
;
2472 ifa_flags
|= IFA_F_PERMANENT
;
2475 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
2476 if (addrconf_finite_timeout(timeout
)) {
2478 ifa_flags
|= IFA_F_DEPRECATED
;
2479 prefered_lft
= timeout
;
2482 ifp
= ipv6_add_addr(idev
, pfx
, peer_pfx
, plen
, scope
, ifa_flags
,
2483 valid_lft
, prefered_lft
);
2486 if (!(ifa_flags
& IFA_F_NOPREFIXROUTE
)) {
2487 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, dev
,
2492 * Note that section 3.1 of RFC 4429 indicates
2493 * that the Optimistic flag should not be set for
2494 * manually configured addresses
2496 addrconf_dad_start(ifp
);
2497 if (ifa_flags
& IFA_F_MANAGETEMPADDR
)
2498 manage_tempaddrs(idev
, ifp
, valid_lft
, prefered_lft
,
2501 addrconf_verify_rtnl();
2505 return PTR_ERR(ifp
);
2508 static int inet6_addr_del(struct net
*net
, int ifindex
, u32 ifa_flags
,
2509 const struct in6_addr
*pfx
, unsigned int plen
)
2511 struct inet6_ifaddr
*ifp
;
2512 struct inet6_dev
*idev
;
2513 struct net_device
*dev
;
2518 dev
= __dev_get_by_index(net
, ifindex
);
2522 if ((idev
= __in6_dev_get(dev
)) == NULL
)
2525 read_lock_bh(&idev
->lock
);
2526 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
2527 if (ifp
->prefix_len
== plen
&&
2528 ipv6_addr_equal(pfx
, &ifp
->addr
)) {
2530 read_unlock_bh(&idev
->lock
);
2532 if (!(ifp
->flags
& IFA_F_TEMPORARY
) &&
2533 (ifa_flags
& IFA_F_MANAGETEMPADDR
))
2534 manage_tempaddrs(idev
, ifp
, 0, 0, false,
2537 addrconf_verify_rtnl();
2541 read_unlock_bh(&idev
->lock
);
2542 return -EADDRNOTAVAIL
;
2546 int addrconf_add_ifaddr(struct net
*net
, void __user
*arg
)
2548 struct in6_ifreq ireq
;
2551 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
2554 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2558 err
= inet6_addr_add(net
, ireq
.ifr6_ifindex
, &ireq
.ifr6_addr
, NULL
,
2559 ireq
.ifr6_prefixlen
, IFA_F_PERMANENT
,
2560 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2565 int addrconf_del_ifaddr(struct net
*net
, void __user
*arg
)
2567 struct in6_ifreq ireq
;
2570 if (!ns_capable(net
->user_ns
, CAP_NET_ADMIN
))
2573 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
2577 err
= inet6_addr_del(net
, ireq
.ifr6_ifindex
, 0, &ireq
.ifr6_addr
,
2578 ireq
.ifr6_prefixlen
);
2583 static void add_addr(struct inet6_dev
*idev
, const struct in6_addr
*addr
,
2584 int plen
, int scope
)
2586 struct inet6_ifaddr
*ifp
;
2588 ifp
= ipv6_add_addr(idev
, addr
, NULL
, plen
,
2589 scope
, IFA_F_PERMANENT
,
2590 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2592 spin_lock_bh(&ifp
->lock
);
2593 ifp
->flags
&= ~IFA_F_TENTATIVE
;
2594 spin_unlock_bh(&ifp
->lock
);
2595 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
2600 #if IS_ENABLED(CONFIG_IPV6_SIT)
2601 static void sit_add_v4_addrs(struct inet6_dev
*idev
)
2603 struct in6_addr addr
;
2604 struct net_device
*dev
;
2605 struct net
*net
= dev_net(idev
->dev
);
2611 memset(&addr
, 0, sizeof(struct in6_addr
));
2612 memcpy(&addr
.s6_addr32
[3], idev
->dev
->dev_addr
, 4);
2614 if (idev
->dev
->flags
&IFF_POINTOPOINT
) {
2615 addr
.s6_addr32
[0] = htonl(0xfe800000);
2619 scope
= IPV6_ADDR_COMPATv4
;
2621 pflags
|= RTF_NONEXTHOP
;
2624 if (addr
.s6_addr32
[3]) {
2625 add_addr(idev
, &addr
, plen
, scope
);
2626 addrconf_prefix_route(&addr
, plen
, idev
->dev
, 0, pflags
);
2630 for_each_netdev(net
, dev
) {
2631 struct in_device
*in_dev
= __in_dev_get_rtnl(dev
);
2632 if (in_dev
&& (dev
->flags
& IFF_UP
)) {
2633 struct in_ifaddr
*ifa
;
2637 for (ifa
= in_dev
->ifa_list
; ifa
; ifa
= ifa
->ifa_next
) {
2639 addr
.s6_addr32
[3] = ifa
->ifa_local
;
2641 if (ifa
->ifa_scope
== RT_SCOPE_LINK
)
2643 if (ifa
->ifa_scope
>= RT_SCOPE_HOST
) {
2644 if (idev
->dev
->flags
&IFF_POINTOPOINT
)
2649 add_addr(idev
, &addr
, plen
, flag
);
2650 addrconf_prefix_route(&addr
, plen
, idev
->dev
, 0,
2658 static void init_loopback(struct net_device
*dev
)
2660 struct inet6_dev
*idev
;
2661 struct net_device
*sp_dev
;
2662 struct inet6_ifaddr
*sp_ifa
;
2663 struct rt6_info
*sp_rt
;
2669 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2670 pr_debug("%s: add_dev failed\n", __func__
);
2674 add_addr(idev
, &in6addr_loopback
, 128, IFA_HOST
);
2676 /* Add routes to other interface's IPv6 addresses */
2677 for_each_netdev(dev_net(dev
), sp_dev
) {
2678 if (!strcmp(sp_dev
->name
, dev
->name
))
2681 idev
= __in6_dev_get(sp_dev
);
2685 read_lock_bh(&idev
->lock
);
2686 list_for_each_entry(sp_ifa
, &idev
->addr_list
, if_list
) {
2688 if (sp_ifa
->flags
& (IFA_F_DADFAILED
| IFA_F_TENTATIVE
))
2692 /* This dst has been added to garbage list when
2693 * lo device down, release this obsolete dst and
2694 * reallocate a new router for ifa.
2696 if (sp_ifa
->rt
->dst
.obsolete
> 0) {
2697 ip6_rt_put(sp_ifa
->rt
);
2704 sp_rt
= addrconf_dst_alloc(idev
, &sp_ifa
->addr
, false);
2706 /* Failure cases are ignored */
2707 if (!IS_ERR(sp_rt
)) {
2712 read_unlock_bh(&idev
->lock
);
2716 static void addrconf_add_linklocal(struct inet6_dev
*idev
, const struct in6_addr
*addr
)
2718 struct inet6_ifaddr
*ifp
;
2719 u32 addr_flags
= IFA_F_PERMANENT
;
2721 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
2722 if (idev
->cnf
.optimistic_dad
&&
2723 !dev_net(idev
->dev
)->ipv6
.devconf_all
->forwarding
)
2724 addr_flags
|= IFA_F_OPTIMISTIC
;
2728 ifp
= ipv6_add_addr(idev
, addr
, NULL
, 64, IFA_LINK
, addr_flags
,
2729 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
);
2731 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, idev
->dev
, 0, 0);
2732 addrconf_dad_start(ifp
);
2737 static void addrconf_addr_gen(struct inet6_dev
*idev
, bool prefix_route
)
2739 if (idev
->addr_gen_mode
== IN6_ADDR_GEN_MODE_EUI64
) {
2740 struct in6_addr addr
;
2742 ipv6_addr_set(&addr
, htonl(0xFE800000), 0, 0, 0);
2743 /* addrconf_add_linklocal also adds a prefix_route and we
2744 * only need to care about prefix routes if ipv6_generate_eui64
2745 * couldn't generate one.
2747 if (ipv6_generate_eui64(addr
.s6_addr
+ 8, idev
->dev
) == 0)
2748 addrconf_add_linklocal(idev
, &addr
);
2749 else if (prefix_route
)
2750 addrconf_prefix_route(&addr
, 64, idev
->dev
, 0, 0);
2754 static void addrconf_dev_config(struct net_device
*dev
)
2756 struct inet6_dev
*idev
;
2760 if ((dev
->type
!= ARPHRD_ETHER
) &&
2761 (dev
->type
!= ARPHRD_FDDI
) &&
2762 (dev
->type
!= ARPHRD_ARCNET
) &&
2763 (dev
->type
!= ARPHRD_INFINIBAND
) &&
2764 (dev
->type
!= ARPHRD_IEEE802154
) &&
2765 (dev
->type
!= ARPHRD_IEEE1394
) &&
2766 (dev
->type
!= ARPHRD_TUNNEL6
) &&
2767 (dev
->type
!= ARPHRD_6LOWPAN
)) {
2768 /* Alas, we support only Ethernet autoconfiguration. */
2772 idev
= addrconf_add_dev(dev
);
2776 addrconf_addr_gen(idev
, false);
2779 #if IS_ENABLED(CONFIG_IPV6_SIT)
2780 static void addrconf_sit_config(struct net_device
*dev
)
2782 struct inet6_dev
*idev
;
2787 * Configure the tunnel with one of our IPv4
2788 * addresses... we should configure all of
2789 * our v4 addrs in the tunnel
2792 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2793 pr_debug("%s: add_dev failed\n", __func__
);
2797 if (dev
->priv_flags
& IFF_ISATAP
) {
2798 addrconf_addr_gen(idev
, false);
2802 sit_add_v4_addrs(idev
);
2804 if (dev
->flags
&IFF_POINTOPOINT
)
2805 addrconf_add_mroute(dev
);
2809 #if IS_ENABLED(CONFIG_NET_IPGRE)
2810 static void addrconf_gre_config(struct net_device
*dev
)
2812 struct inet6_dev
*idev
;
2816 if ((idev
= ipv6_find_idev(dev
)) == NULL
) {
2817 pr_debug("%s: add_dev failed\n", __func__
);
2821 addrconf_addr_gen(idev
, true);
2825 static int addrconf_notify(struct notifier_block
*this, unsigned long event
,
2828 struct net_device
*dev
= netdev_notifier_info_to_dev(ptr
);
2829 struct inet6_dev
*idev
= __in6_dev_get(dev
);
2830 int run_pending
= 0;
2834 case NETDEV_REGISTER
:
2835 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2836 idev
= ipv6_add_dev(dev
);
2838 return notifier_from_errno(PTR_ERR(idev
));
2844 if (dev
->flags
& IFF_SLAVE
)
2847 if (idev
&& idev
->cnf
.disable_ipv6
)
2850 if (event
== NETDEV_UP
) {
2851 if (!addrconf_qdisc_ok(dev
)) {
2852 /* device is not ready yet. */
2853 pr_info("ADDRCONF(NETDEV_UP): %s: link is not ready\n",
2858 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
)
2859 idev
= ipv6_add_dev(dev
);
2861 if (!IS_ERR_OR_NULL(idev
)) {
2862 idev
->if_flags
|= IF_READY
;
2866 if (!addrconf_qdisc_ok(dev
)) {
2867 /* device is still not ready. */
2872 if (idev
->if_flags
& IF_READY
)
2873 /* device is already configured. */
2875 idev
->if_flags
|= IF_READY
;
2878 pr_info("ADDRCONF(NETDEV_CHANGE): %s: link becomes ready\n",
2884 switch (dev
->type
) {
2885 #if IS_ENABLED(CONFIG_IPV6_SIT)
2887 addrconf_sit_config(dev
);
2890 #if IS_ENABLED(CONFIG_NET_IPGRE)
2892 addrconf_gre_config(dev
);
2895 case ARPHRD_LOOPBACK
:
2900 addrconf_dev_config(dev
);
2904 if (!IS_ERR_OR_NULL(idev
)) {
2906 addrconf_dad_run(idev
);
2909 * If the MTU changed during the interface down,
2910 * when the interface up, the changed MTU must be
2911 * reflected in the idev as well as routers.
2913 if (idev
->cnf
.mtu6
!= dev
->mtu
&&
2914 dev
->mtu
>= IPV6_MIN_MTU
) {
2915 rt6_mtu_change(dev
, dev
->mtu
);
2916 idev
->cnf
.mtu6
= dev
->mtu
;
2918 idev
->tstamp
= jiffies
;
2919 inet6_ifinfo_notify(RTM_NEWLINK
, idev
);
2922 * If the changed mtu during down is lower than
2923 * IPV6_MIN_MTU stop IPv6 on this interface.
2925 if (dev
->mtu
< IPV6_MIN_MTU
)
2926 addrconf_ifdown(dev
, 1);
2930 case NETDEV_CHANGEMTU
:
2931 if (idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2932 rt6_mtu_change(dev
, dev
->mtu
);
2933 idev
->cnf
.mtu6
= dev
->mtu
;
2937 if (!idev
&& dev
->mtu
>= IPV6_MIN_MTU
) {
2938 idev
= ipv6_add_dev(dev
);
2944 * if MTU under IPV6_MIN_MTU.
2945 * Stop IPv6 on this interface.
2949 case NETDEV_UNREGISTER
:
2951 * Remove all addresses from this interface.
2953 addrconf_ifdown(dev
, event
!= NETDEV_DOWN
);
2956 case NETDEV_CHANGENAME
:
2958 snmp6_unregister_dev(idev
);
2959 addrconf_sysctl_unregister(idev
);
2960 err
= addrconf_sysctl_register(idev
);
2962 return notifier_from_errno(err
);
2963 err
= snmp6_register_dev(idev
);
2965 addrconf_sysctl_unregister(idev
);
2966 return notifier_from_errno(err
);
2971 case NETDEV_PRE_TYPE_CHANGE
:
2972 case NETDEV_POST_TYPE_CHANGE
:
2973 addrconf_type_change(dev
, event
);
2981 * addrconf module should be notified of a device going up
2983 static struct notifier_block ipv6_dev_notf
= {
2984 .notifier_call
= addrconf_notify
,
2987 static void addrconf_type_change(struct net_device
*dev
, unsigned long event
)
2989 struct inet6_dev
*idev
;
2992 idev
= __in6_dev_get(dev
);
2994 if (event
== NETDEV_POST_TYPE_CHANGE
)
2995 ipv6_mc_remap(idev
);
2996 else if (event
== NETDEV_PRE_TYPE_CHANGE
)
2997 ipv6_mc_unmap(idev
);
3000 static int addrconf_ifdown(struct net_device
*dev
, int how
)
3002 struct net
*net
= dev_net(dev
);
3003 struct inet6_dev
*idev
;
3004 struct inet6_ifaddr
*ifa
;
3009 rt6_ifdown(net
, dev
);
3010 neigh_ifdown(&nd_tbl
, dev
);
3012 idev
= __in6_dev_get(dev
);
3017 * Step 1: remove reference to ipv6 device from parent device.
3023 /* protected by rtnl_lock */
3024 RCU_INIT_POINTER(dev
->ip6_ptr
, NULL
);
3026 /* Step 1.5: remove snmp6 entry */
3027 snmp6_unregister_dev(idev
);
3031 /* Step 2: clear hash table */
3032 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
3033 struct hlist_head
*h
= &inet6_addr_lst
[i
];
3035 spin_lock_bh(&addrconf_hash_lock
);
3037 hlist_for_each_entry_rcu(ifa
, h
, addr_lst
) {
3038 if (ifa
->idev
== idev
) {
3039 hlist_del_init_rcu(&ifa
->addr_lst
);
3040 addrconf_del_dad_work(ifa
);
3044 spin_unlock_bh(&addrconf_hash_lock
);
3047 write_lock_bh(&idev
->lock
);
3049 addrconf_del_rs_timer(idev
);
3051 /* Step 2: clear flags for stateless addrconf */
3053 idev
->if_flags
&= ~(IF_RS_SENT
|IF_RA_RCVD
|IF_READY
);
3055 if (how
&& del_timer(&idev
->regen_timer
))
3058 /* Step 3: clear tempaddr list */
3059 while (!list_empty(&idev
->tempaddr_list
)) {
3060 ifa
= list_first_entry(&idev
->tempaddr_list
,
3061 struct inet6_ifaddr
, tmp_list
);
3062 list_del(&ifa
->tmp_list
);
3063 write_unlock_bh(&idev
->lock
);
3064 spin_lock_bh(&ifa
->lock
);
3067 in6_ifa_put(ifa
->ifpub
);
3070 spin_unlock_bh(&ifa
->lock
);
3072 write_lock_bh(&idev
->lock
);
3075 while (!list_empty(&idev
->addr_list
)) {
3076 ifa
= list_first_entry(&idev
->addr_list
,
3077 struct inet6_ifaddr
, if_list
);
3078 addrconf_del_dad_work(ifa
);
3080 list_del(&ifa
->if_list
);
3082 write_unlock_bh(&idev
->lock
);
3084 spin_lock_bh(&ifa
->state_lock
);
3086 ifa
->state
= INET6_IFADDR_STATE_DEAD
;
3087 spin_unlock_bh(&ifa
->state_lock
);
3089 if (state
!= INET6_IFADDR_STATE_DEAD
) {
3090 __ipv6_ifa_notify(RTM_DELADDR
, ifa
);
3091 inet6addr_notifier_call_chain(NETDEV_DOWN
, ifa
);
3095 write_lock_bh(&idev
->lock
);
3098 write_unlock_bh(&idev
->lock
);
3100 /* Step 5: Discard anycast and multicast list */
3102 ipv6_ac_destroy_dev(idev
);
3103 ipv6_mc_destroy_dev(idev
);
3108 idev
->tstamp
= jiffies
;
3110 /* Last: Shot the device (if unregistered) */
3112 addrconf_sysctl_unregister(idev
);
3113 neigh_parms_release(&nd_tbl
, idev
->nd_parms
);
3114 neigh_ifdown(&nd_tbl
, dev
);
3120 static void addrconf_rs_timer(unsigned long data
)
3122 struct inet6_dev
*idev
= (struct inet6_dev
*)data
;
3123 struct net_device
*dev
= idev
->dev
;
3124 struct in6_addr lladdr
;
3126 write_lock(&idev
->lock
);
3127 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
))
3130 if (!ipv6_accept_ra(idev
))
3133 /* Announcement received after solicitation was sent */
3134 if (idev
->if_flags
& IF_RA_RCVD
)
3137 if (idev
->rs_probes
++ < idev
->cnf
.rtr_solicits
) {
3138 write_unlock(&idev
->lock
);
3139 if (!ipv6_get_lladdr(dev
, &lladdr
, IFA_F_TENTATIVE
))
3140 ndisc_send_rs(dev
, &lladdr
,
3141 &in6addr_linklocal_allrouters
);
3145 write_lock(&idev
->lock
);
3146 /* The wait after the last probe can be shorter */
3147 addrconf_mod_rs_timer(idev
, (idev
->rs_probes
==
3148 idev
->cnf
.rtr_solicits
) ?
3149 idev
->cnf
.rtr_solicit_delay
:
3150 idev
->cnf
.rtr_solicit_interval
);
3153 * Note: we do not support deprecated "all on-link"
3154 * assumption any longer.
3156 pr_debug("%s: no IPv6 routers present\n", idev
->dev
->name
);
3160 write_unlock(&idev
->lock
);
3166 * Duplicate Address Detection
3168 static void addrconf_dad_kick(struct inet6_ifaddr
*ifp
)
3170 unsigned long rand_num
;
3171 struct inet6_dev
*idev
= ifp
->idev
;
3173 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
3176 rand_num
= prandom_u32() % (idev
->cnf
.rtr_solicit_delay
? : 1);
3178 ifp
->dad_probes
= idev
->cnf
.dad_transmits
;
3179 addrconf_mod_dad_work(ifp
, rand_num
);
3182 static void addrconf_dad_begin(struct inet6_ifaddr
*ifp
)
3184 struct inet6_dev
*idev
= ifp
->idev
;
3185 struct net_device
*dev
= idev
->dev
;
3187 addrconf_join_solict(dev
, &ifp
->addr
);
3189 prandom_seed((__force u32
) ifp
->addr
.s6_addr32
[3]);
3191 read_lock_bh(&idev
->lock
);
3192 spin_lock(&ifp
->lock
);
3193 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
)
3196 if (dev
->flags
&(IFF_NOARP
|IFF_LOOPBACK
) ||
3197 idev
->cnf
.accept_dad
< 1 ||
3198 !(ifp
->flags
&IFA_F_TENTATIVE
) ||
3199 ifp
->flags
& IFA_F_NODAD
) {
3200 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
3201 spin_unlock(&ifp
->lock
);
3202 read_unlock_bh(&idev
->lock
);
3204 addrconf_dad_completed(ifp
);
3208 if (!(idev
->if_flags
& IF_READY
)) {
3209 spin_unlock(&ifp
->lock
);
3210 read_unlock_bh(&idev
->lock
);
3212 * If the device is not ready:
3213 * - keep it tentative if it is a permanent address.
3214 * - otherwise, kill it.
3217 addrconf_dad_stop(ifp
, 0);
3222 * Optimistic nodes can start receiving
3225 if (ifp
->flags
& IFA_F_OPTIMISTIC
)
3226 ip6_ins_rt(ifp
->rt
);
3228 addrconf_dad_kick(ifp
);
3230 spin_unlock(&ifp
->lock
);
3231 read_unlock_bh(&idev
->lock
);
3234 static void addrconf_dad_start(struct inet6_ifaddr
*ifp
)
3236 bool begin_dad
= false;
3238 spin_lock_bh(&ifp
->state_lock
);
3239 if (ifp
->state
!= INET6_IFADDR_STATE_DEAD
) {
3240 ifp
->state
= INET6_IFADDR_STATE_PREDAD
;
3243 spin_unlock_bh(&ifp
->state_lock
);
3246 addrconf_mod_dad_work(ifp
, 0);
3249 static void addrconf_dad_work(struct work_struct
*w
)
3251 struct inet6_ifaddr
*ifp
= container_of(to_delayed_work(w
),
3252 struct inet6_ifaddr
,
3254 struct inet6_dev
*idev
= ifp
->idev
;
3255 struct in6_addr mcaddr
;
3261 } action
= DAD_PROCESS
;
3265 spin_lock_bh(&ifp
->state_lock
);
3266 if (ifp
->state
== INET6_IFADDR_STATE_PREDAD
) {
3268 ifp
->state
= INET6_IFADDR_STATE_DAD
;
3269 } else if (ifp
->state
== INET6_IFADDR_STATE_ERRDAD
) {
3271 ifp
->state
= INET6_IFADDR_STATE_POSTDAD
;
3273 spin_unlock_bh(&ifp
->state_lock
);
3275 if (action
== DAD_BEGIN
) {
3276 addrconf_dad_begin(ifp
);
3278 } else if (action
== DAD_ABORT
) {
3279 addrconf_dad_stop(ifp
, 1);
3283 if (!ifp
->dad_probes
&& addrconf_dad_end(ifp
))
3286 write_lock_bh(&idev
->lock
);
3287 if (idev
->dead
|| !(idev
->if_flags
& IF_READY
)) {
3288 write_unlock_bh(&idev
->lock
);
3292 spin_lock(&ifp
->lock
);
3293 if (ifp
->state
== INET6_IFADDR_STATE_DEAD
) {
3294 spin_unlock(&ifp
->lock
);
3295 write_unlock_bh(&idev
->lock
);
3299 if (ifp
->dad_probes
== 0) {
3301 * DAD was successful
3304 ifp
->flags
&= ~(IFA_F_TENTATIVE
|IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
);
3305 spin_unlock(&ifp
->lock
);
3306 write_unlock_bh(&idev
->lock
);
3308 addrconf_dad_completed(ifp
);
3314 addrconf_mod_dad_work(ifp
,
3315 NEIGH_VAR(ifp
->idev
->nd_parms
, RETRANS_TIME
));
3316 spin_unlock(&ifp
->lock
);
3317 write_unlock_bh(&idev
->lock
);
3319 /* send a neighbour solicitation for our addr */
3320 addrconf_addr_solict_mult(&ifp
->addr
, &mcaddr
);
3321 ndisc_send_ns(ifp
->idev
->dev
, NULL
, &ifp
->addr
, &mcaddr
, &in6addr_any
);
3327 /* ifp->idev must be at least read locked */
3328 static bool ipv6_lonely_lladdr(struct inet6_ifaddr
*ifp
)
3330 struct inet6_ifaddr
*ifpiter
;
3331 struct inet6_dev
*idev
= ifp
->idev
;
3333 list_for_each_entry_reverse(ifpiter
, &idev
->addr_list
, if_list
) {
3334 if (ifpiter
->scope
> IFA_LINK
)
3336 if (ifp
!= ifpiter
&& ifpiter
->scope
== IFA_LINK
&&
3337 (ifpiter
->flags
& (IFA_F_PERMANENT
|IFA_F_TENTATIVE
|
3338 IFA_F_OPTIMISTIC
|IFA_F_DADFAILED
)) ==
3345 static void addrconf_dad_completed(struct inet6_ifaddr
*ifp
)
3347 struct net_device
*dev
= ifp
->idev
->dev
;
3348 struct in6_addr lladdr
;
3349 bool send_rs
, send_mld
;
3351 addrconf_del_dad_work(ifp
);
3354 * Configure the address for reception. Now it is valid.
3357 ipv6_ifa_notify(RTM_NEWADDR
, ifp
);
3359 /* If added prefix is link local and we are prepared to process
3360 router advertisements, start sending router solicitations.
3363 read_lock_bh(&ifp
->idev
->lock
);
3364 send_mld
= ifp
->scope
== IFA_LINK
&& ipv6_lonely_lladdr(ifp
);
3365 send_rs
= send_mld
&&
3366 ipv6_accept_ra(ifp
->idev
) &&
3367 ifp
->idev
->cnf
.rtr_solicits
> 0 &&
3368 (dev
->flags
&IFF_LOOPBACK
) == 0;
3369 read_unlock_bh(&ifp
->idev
->lock
);
3371 /* While dad is in progress mld report's source address is in6_addrany.
3372 * Resend with proper ll now.
3375 ipv6_mc_dad_complete(ifp
->idev
);
3379 * If a host as already performed a random delay
3380 * [...] as part of DAD [...] there is no need
3381 * to delay again before sending the first RS
3383 if (ipv6_get_lladdr(dev
, &lladdr
, IFA_F_TENTATIVE
))
3385 ndisc_send_rs(dev
, &lladdr
, &in6addr_linklocal_allrouters
);
3387 write_lock_bh(&ifp
->idev
->lock
);
3388 spin_lock(&ifp
->lock
);
3389 ifp
->idev
->rs_probes
= 1;
3390 ifp
->idev
->if_flags
|= IF_RS_SENT
;
3391 addrconf_mod_rs_timer(ifp
->idev
,
3392 ifp
->idev
->cnf
.rtr_solicit_interval
);
3393 spin_unlock(&ifp
->lock
);
3394 write_unlock_bh(&ifp
->idev
->lock
);
3398 static void addrconf_dad_run(struct inet6_dev
*idev
)
3400 struct inet6_ifaddr
*ifp
;
3402 read_lock_bh(&idev
->lock
);
3403 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
3404 spin_lock(&ifp
->lock
);
3405 if (ifp
->flags
& IFA_F_TENTATIVE
&&
3406 ifp
->state
== INET6_IFADDR_STATE_DAD
)
3407 addrconf_dad_kick(ifp
);
3408 spin_unlock(&ifp
->lock
);
3410 read_unlock_bh(&idev
->lock
);
3413 #ifdef CONFIG_PROC_FS
3414 struct if6_iter_state
{
3415 struct seq_net_private p
;
3420 static struct inet6_ifaddr
*if6_get_first(struct seq_file
*seq
, loff_t pos
)
3422 struct inet6_ifaddr
*ifa
= NULL
;
3423 struct if6_iter_state
*state
= seq
->private;
3424 struct net
*net
= seq_file_net(seq
);
3427 /* initial bucket if pos is 0 */
3433 for (; state
->bucket
< IN6_ADDR_HSIZE
; ++state
->bucket
) {
3434 hlist_for_each_entry_rcu_bh(ifa
, &inet6_addr_lst
[state
->bucket
],
3436 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
3438 /* sync with offset */
3439 if (p
< state
->offset
) {
3447 /* prepare for next bucket */
3454 static struct inet6_ifaddr
*if6_get_next(struct seq_file
*seq
,
3455 struct inet6_ifaddr
*ifa
)
3457 struct if6_iter_state
*state
= seq
->private;
3458 struct net
*net
= seq_file_net(seq
);
3460 hlist_for_each_entry_continue_rcu_bh(ifa
, addr_lst
) {
3461 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
3467 while (++state
->bucket
< IN6_ADDR_HSIZE
) {
3469 hlist_for_each_entry_rcu_bh(ifa
,
3470 &inet6_addr_lst
[state
->bucket
], addr_lst
) {
3471 if (!net_eq(dev_net(ifa
->idev
->dev
), net
))
3481 static void *if6_seq_start(struct seq_file
*seq
, loff_t
*pos
)
3485 return if6_get_first(seq
, *pos
);
3488 static void *if6_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
3490 struct inet6_ifaddr
*ifa
;
3492 ifa
= if6_get_next(seq
, v
);
3497 static void if6_seq_stop(struct seq_file
*seq
, void *v
)
3500 rcu_read_unlock_bh();
3503 static int if6_seq_show(struct seq_file
*seq
, void *v
)
3505 struct inet6_ifaddr
*ifp
= (struct inet6_ifaddr
*)v
;
3506 seq_printf(seq
, "%pi6 %02x %02x %02x %02x %8s\n",
3508 ifp
->idev
->dev
->ifindex
,
3512 ifp
->idev
->dev
->name
);
3516 static const struct seq_operations if6_seq_ops
= {
3517 .start
= if6_seq_start
,
3518 .next
= if6_seq_next
,
3519 .show
= if6_seq_show
,
3520 .stop
= if6_seq_stop
,
3523 static int if6_seq_open(struct inode
*inode
, struct file
*file
)
3525 return seq_open_net(inode
, file
, &if6_seq_ops
,
3526 sizeof(struct if6_iter_state
));
3529 static const struct file_operations if6_fops
= {
3530 .owner
= THIS_MODULE
,
3531 .open
= if6_seq_open
,
3533 .llseek
= seq_lseek
,
3534 .release
= seq_release_net
,
3537 static int __net_init
if6_proc_net_init(struct net
*net
)
3539 if (!proc_create("if_inet6", S_IRUGO
, net
->proc_net
, &if6_fops
))
3544 static void __net_exit
if6_proc_net_exit(struct net
*net
)
3546 remove_proc_entry("if_inet6", net
->proc_net
);
3549 static struct pernet_operations if6_proc_net_ops
= {
3550 .init
= if6_proc_net_init
,
3551 .exit
= if6_proc_net_exit
,
3554 int __init
if6_proc_init(void)
3556 return register_pernet_subsys(&if6_proc_net_ops
);
3559 void if6_proc_exit(void)
3561 unregister_pernet_subsys(&if6_proc_net_ops
);
3563 #endif /* CONFIG_PROC_FS */
3565 #if IS_ENABLED(CONFIG_IPV6_MIP6)
3566 /* Check if address is a home address configured on any interface. */
3567 int ipv6_chk_home_addr(struct net
*net
, const struct in6_addr
*addr
)
3570 struct inet6_ifaddr
*ifp
= NULL
;
3571 unsigned int hash
= inet6_addr_hash(addr
);
3574 hlist_for_each_entry_rcu_bh(ifp
, &inet6_addr_lst
[hash
], addr_lst
) {
3575 if (!net_eq(dev_net(ifp
->idev
->dev
), net
))
3577 if (ipv6_addr_equal(&ifp
->addr
, addr
) &&
3578 (ifp
->flags
& IFA_F_HOMEADDRESS
)) {
3583 rcu_read_unlock_bh();
3589 * Periodic address status verification
3592 static void addrconf_verify_rtnl(void)
3594 unsigned long now
, next
, next_sec
, next_sched
;
3595 struct inet6_ifaddr
*ifp
;
3602 next
= round_jiffies_up(now
+ ADDR_CHECK_FREQUENCY
);
3604 cancel_delayed_work(&addr_chk_work
);
3606 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++) {
3608 hlist_for_each_entry_rcu_bh(ifp
, &inet6_addr_lst
[i
], addr_lst
) {
3611 /* When setting preferred_lft to a value not zero or
3612 * infinity, while valid_lft is infinity
3613 * IFA_F_PERMANENT has a non-infinity life time.
3615 if ((ifp
->flags
& IFA_F_PERMANENT
) &&
3616 (ifp
->prefered_lft
== INFINITY_LIFE_TIME
))
3619 spin_lock(&ifp
->lock
);
3620 /* We try to batch several events at once. */
3621 age
= (now
- ifp
->tstamp
+ ADDRCONF_TIMER_FUZZ_MINUS
) / HZ
;
3623 if (ifp
->valid_lft
!= INFINITY_LIFE_TIME
&&
3624 age
>= ifp
->valid_lft
) {
3625 spin_unlock(&ifp
->lock
);
3629 } else if (ifp
->prefered_lft
== INFINITY_LIFE_TIME
) {
3630 spin_unlock(&ifp
->lock
);
3632 } else if (age
>= ifp
->prefered_lft
) {
3633 /* jiffies - ifp->tstamp > age >= ifp->prefered_lft */
3636 if (!(ifp
->flags
&IFA_F_DEPRECATED
)) {
3638 ifp
->flags
|= IFA_F_DEPRECATED
;
3641 if ((ifp
->valid_lft
!= INFINITY_LIFE_TIME
) &&
3642 (time_before(ifp
->tstamp
+ ifp
->valid_lft
* HZ
, next
)))
3643 next
= ifp
->tstamp
+ ifp
->valid_lft
* HZ
;
3645 spin_unlock(&ifp
->lock
);
3650 ipv6_ifa_notify(0, ifp
);
3654 } else if ((ifp
->flags
&IFA_F_TEMPORARY
) &&
3655 !(ifp
->flags
&IFA_F_TENTATIVE
)) {
3656 unsigned long regen_advance
= ifp
->idev
->cnf
.regen_max_retry
*
3657 ifp
->idev
->cnf
.dad_transmits
*
3658 NEIGH_VAR(ifp
->idev
->nd_parms
, RETRANS_TIME
) / HZ
;
3660 if (age
>= ifp
->prefered_lft
- regen_advance
) {
3661 struct inet6_ifaddr
*ifpub
= ifp
->ifpub
;
3662 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3663 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3664 if (!ifp
->regen_count
&& ifpub
) {
3667 in6_ifa_hold(ifpub
);
3668 spin_unlock(&ifp
->lock
);
3670 spin_lock(&ifpub
->lock
);
3671 ifpub
->regen_count
= 0;
3672 spin_unlock(&ifpub
->lock
);
3673 ipv6_create_tempaddr(ifpub
, ifp
);
3678 } else if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
, next
))
3679 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
- regen_advance
* HZ
;
3680 spin_unlock(&ifp
->lock
);
3682 /* ifp->prefered_lft <= ifp->valid_lft */
3683 if (time_before(ifp
->tstamp
+ ifp
->prefered_lft
* HZ
, next
))
3684 next
= ifp
->tstamp
+ ifp
->prefered_lft
* HZ
;
3685 spin_unlock(&ifp
->lock
);
3690 next_sec
= round_jiffies_up(next
);
3693 /* If rounded timeout is accurate enough, accept it. */
3694 if (time_before(next_sec
, next
+ ADDRCONF_TIMER_FUZZ
))
3695 next_sched
= next_sec
;
3697 /* And minimum interval is ADDRCONF_TIMER_FUZZ_MAX. */
3698 if (time_before(next_sched
, jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
))
3699 next_sched
= jiffies
+ ADDRCONF_TIMER_FUZZ_MAX
;
3701 ADBG(KERN_DEBUG
"now = %lu, schedule = %lu, rounded schedule = %lu => %lu\n",
3702 now
, next
, next_sec
, next_sched
);
3703 mod_delayed_work(addrconf_wq
, &addr_chk_work
, next_sched
- now
);
3704 rcu_read_unlock_bh();
3707 static void addrconf_verify_work(struct work_struct
*w
)
3710 addrconf_verify_rtnl();
3714 static void addrconf_verify(void)
3716 mod_delayed_work(addrconf_wq
, &addr_chk_work
, 0);
3719 static struct in6_addr
*extract_addr(struct nlattr
*addr
, struct nlattr
*local
,
3720 struct in6_addr
**peer_pfx
)
3722 struct in6_addr
*pfx
= NULL
;
3727 pfx
= nla_data(addr
);
3730 if (pfx
&& nla_memcmp(local
, pfx
, sizeof(*pfx
)))
3732 pfx
= nla_data(local
);
3738 static const struct nla_policy ifa_ipv6_policy
[IFA_MAX
+1] = {
3739 [IFA_ADDRESS
] = { .len
= sizeof(struct in6_addr
) },
3740 [IFA_LOCAL
] = { .len
= sizeof(struct in6_addr
) },
3741 [IFA_CACHEINFO
] = { .len
= sizeof(struct ifa_cacheinfo
) },
3742 [IFA_FLAGS
] = { .len
= sizeof(u32
) },
3746 inet6_rtm_deladdr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
3748 struct net
*net
= sock_net(skb
->sk
);
3749 struct ifaddrmsg
*ifm
;
3750 struct nlattr
*tb
[IFA_MAX
+1];
3751 struct in6_addr
*pfx
, *peer_pfx
;
3755 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3759 ifm
= nlmsg_data(nlh
);
3760 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
], &peer_pfx
);
3764 ifa_flags
= tb
[IFA_FLAGS
] ? nla_get_u32(tb
[IFA_FLAGS
]) : ifm
->ifa_flags
;
3766 /* We ignore other flags so far. */
3767 ifa_flags
&= IFA_F_MANAGETEMPADDR
;
3769 return inet6_addr_del(net
, ifm
->ifa_index
, ifa_flags
, pfx
,
3770 ifm
->ifa_prefixlen
);
3773 static int inet6_addr_modify(struct inet6_ifaddr
*ifp
, u32 ifa_flags
,
3774 u32 prefered_lft
, u32 valid_lft
)
3778 unsigned long timeout
;
3779 bool was_managetempaddr
;
3780 bool had_prefixroute
;
3784 if (!valid_lft
|| (prefered_lft
> valid_lft
))
3787 if (ifa_flags
& IFA_F_MANAGETEMPADDR
&&
3788 (ifp
->flags
& IFA_F_TEMPORARY
|| ifp
->prefix_len
!= 64))
3791 timeout
= addrconf_timeout_fixup(valid_lft
, HZ
);
3792 if (addrconf_finite_timeout(timeout
)) {
3793 expires
= jiffies_to_clock_t(timeout
* HZ
);
3794 valid_lft
= timeout
;
3795 flags
= RTF_EXPIRES
;
3799 ifa_flags
|= IFA_F_PERMANENT
;
3802 timeout
= addrconf_timeout_fixup(prefered_lft
, HZ
);
3803 if (addrconf_finite_timeout(timeout
)) {
3805 ifa_flags
|= IFA_F_DEPRECATED
;
3806 prefered_lft
= timeout
;
3809 spin_lock_bh(&ifp
->lock
);
3810 was_managetempaddr
= ifp
->flags
& IFA_F_MANAGETEMPADDR
;
3811 had_prefixroute
= ifp
->flags
& IFA_F_PERMANENT
&&
3812 !(ifp
->flags
& IFA_F_NOPREFIXROUTE
);
3813 ifp
->flags
&= ~(IFA_F_DEPRECATED
| IFA_F_PERMANENT
| IFA_F_NODAD
|
3814 IFA_F_HOMEADDRESS
| IFA_F_MANAGETEMPADDR
|
3815 IFA_F_NOPREFIXROUTE
);
3816 ifp
->flags
|= ifa_flags
;
3817 ifp
->tstamp
= jiffies
;
3818 ifp
->valid_lft
= valid_lft
;
3819 ifp
->prefered_lft
= prefered_lft
;
3821 spin_unlock_bh(&ifp
->lock
);
3822 if (!(ifp
->flags
&IFA_F_TENTATIVE
))
3823 ipv6_ifa_notify(0, ifp
);
3825 if (!(ifa_flags
& IFA_F_NOPREFIXROUTE
)) {
3826 addrconf_prefix_route(&ifp
->addr
, ifp
->prefix_len
, ifp
->idev
->dev
,
3828 } else if (had_prefixroute
) {
3829 enum cleanup_prefix_rt_t action
;
3830 unsigned long rt_expires
;
3832 write_lock_bh(&ifp
->idev
->lock
);
3833 action
= check_cleanup_prefix_route(ifp
, &rt_expires
);
3834 write_unlock_bh(&ifp
->idev
->lock
);
3836 if (action
!= CLEANUP_PREFIX_RT_NOP
) {
3837 cleanup_prefix_route(ifp
, rt_expires
,
3838 action
== CLEANUP_PREFIX_RT_DEL
);
3842 if (was_managetempaddr
|| ifp
->flags
& IFA_F_MANAGETEMPADDR
) {
3843 if (was_managetempaddr
&& !(ifp
->flags
& IFA_F_MANAGETEMPADDR
))
3844 valid_lft
= prefered_lft
= 0;
3845 manage_tempaddrs(ifp
->idev
, ifp
, valid_lft
, prefered_lft
,
3846 !was_managetempaddr
, jiffies
);
3849 addrconf_verify_rtnl();
3855 inet6_rtm_newaddr(struct sk_buff
*skb
, struct nlmsghdr
*nlh
)
3857 struct net
*net
= sock_net(skb
->sk
);
3858 struct ifaddrmsg
*ifm
;
3859 struct nlattr
*tb
[IFA_MAX
+1];
3860 struct in6_addr
*pfx
, *peer_pfx
;
3861 struct inet6_ifaddr
*ifa
;
3862 struct net_device
*dev
;
3863 u32 valid_lft
= INFINITY_LIFE_TIME
, preferred_lft
= INFINITY_LIFE_TIME
;
3867 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
3871 ifm
= nlmsg_data(nlh
);
3872 pfx
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
], &peer_pfx
);
3876 if (tb
[IFA_CACHEINFO
]) {
3877 struct ifa_cacheinfo
*ci
;
3879 ci
= nla_data(tb
[IFA_CACHEINFO
]);
3880 valid_lft
= ci
->ifa_valid
;
3881 preferred_lft
= ci
->ifa_prefered
;
3883 preferred_lft
= INFINITY_LIFE_TIME
;
3884 valid_lft
= INFINITY_LIFE_TIME
;
3887 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
3891 ifa_flags
= tb
[IFA_FLAGS
] ? nla_get_u32(tb
[IFA_FLAGS
]) : ifm
->ifa_flags
;
3893 /* We ignore other flags so far. */
3894 ifa_flags
&= IFA_F_NODAD
| IFA_F_HOMEADDRESS
| IFA_F_MANAGETEMPADDR
|
3895 IFA_F_NOPREFIXROUTE
;
3897 ifa
= ipv6_get_ifaddr(net
, pfx
, dev
, 1);
3900 * It would be best to check for !NLM_F_CREATE here but
3901 * userspace already relies on not having to provide this.
3903 return inet6_addr_add(net
, ifm
->ifa_index
, pfx
, peer_pfx
,
3904 ifm
->ifa_prefixlen
, ifa_flags
,
3905 preferred_lft
, valid_lft
);
3908 if (nlh
->nlmsg_flags
& NLM_F_EXCL
||
3909 !(nlh
->nlmsg_flags
& NLM_F_REPLACE
))
3912 err
= inet6_addr_modify(ifa
, ifa_flags
, preferred_lft
, valid_lft
);
3919 static void put_ifaddrmsg(struct nlmsghdr
*nlh
, u8 prefixlen
, u32 flags
,
3920 u8 scope
, int ifindex
)
3922 struct ifaddrmsg
*ifm
;
3924 ifm
= nlmsg_data(nlh
);
3925 ifm
->ifa_family
= AF_INET6
;
3926 ifm
->ifa_prefixlen
= prefixlen
;
3927 ifm
->ifa_flags
= flags
;
3928 ifm
->ifa_scope
= scope
;
3929 ifm
->ifa_index
= ifindex
;
3932 static int put_cacheinfo(struct sk_buff
*skb
, unsigned long cstamp
,
3933 unsigned long tstamp
, u32 preferred
, u32 valid
)
3935 struct ifa_cacheinfo ci
;
3937 ci
.cstamp
= cstamp_delta(cstamp
);
3938 ci
.tstamp
= cstamp_delta(tstamp
);
3939 ci
.ifa_prefered
= preferred
;
3940 ci
.ifa_valid
= valid
;
3942 return nla_put(skb
, IFA_CACHEINFO
, sizeof(ci
), &ci
);
3945 static inline int rt_scope(int ifa_scope
)
3947 if (ifa_scope
& IFA_HOST
)
3948 return RT_SCOPE_HOST
;
3949 else if (ifa_scope
& IFA_LINK
)
3950 return RT_SCOPE_LINK
;
3951 else if (ifa_scope
& IFA_SITE
)
3952 return RT_SCOPE_SITE
;
3954 return RT_SCOPE_UNIVERSE
;
3957 static inline int inet6_ifaddr_msgsize(void)
3959 return NLMSG_ALIGN(sizeof(struct ifaddrmsg
))
3960 + nla_total_size(16) /* IFA_LOCAL */
3961 + nla_total_size(16) /* IFA_ADDRESS */
3962 + nla_total_size(sizeof(struct ifa_cacheinfo
))
3963 + nla_total_size(4) /* IFA_FLAGS */;
3966 static int inet6_fill_ifaddr(struct sk_buff
*skb
, struct inet6_ifaddr
*ifa
,
3967 u32 portid
, u32 seq
, int event
, unsigned int flags
)
3969 struct nlmsghdr
*nlh
;
3970 u32 preferred
, valid
;
3972 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
3976 put_ifaddrmsg(nlh
, ifa
->prefix_len
, ifa
->flags
, rt_scope(ifa
->scope
),
3977 ifa
->idev
->dev
->ifindex
);
3979 if (!((ifa
->flags
&IFA_F_PERMANENT
) &&
3980 (ifa
->prefered_lft
== INFINITY_LIFE_TIME
))) {
3981 preferred
= ifa
->prefered_lft
;
3982 valid
= ifa
->valid_lft
;
3983 if (preferred
!= INFINITY_LIFE_TIME
) {
3984 long tval
= (jiffies
- ifa
->tstamp
)/HZ
;
3985 if (preferred
> tval
)
3989 if (valid
!= INFINITY_LIFE_TIME
) {
3997 preferred
= INFINITY_LIFE_TIME
;
3998 valid
= INFINITY_LIFE_TIME
;
4001 if (!ipv6_addr_any(&ifa
->peer_addr
)) {
4002 if (nla_put(skb
, IFA_LOCAL
, 16, &ifa
->addr
) < 0 ||
4003 nla_put(skb
, IFA_ADDRESS
, 16, &ifa
->peer_addr
) < 0)
4006 if (nla_put(skb
, IFA_ADDRESS
, 16, &ifa
->addr
) < 0)
4009 if (put_cacheinfo(skb
, ifa
->cstamp
, ifa
->tstamp
, preferred
, valid
) < 0)
4012 if (nla_put_u32(skb
, IFA_FLAGS
, ifa
->flags
) < 0)
4015 return nlmsg_end(skb
, nlh
);
4018 nlmsg_cancel(skb
, nlh
);
4022 static int inet6_fill_ifmcaddr(struct sk_buff
*skb
, struct ifmcaddr6
*ifmca
,
4023 u32 portid
, u32 seq
, int event
, u16 flags
)
4025 struct nlmsghdr
*nlh
;
4026 u8 scope
= RT_SCOPE_UNIVERSE
;
4027 int ifindex
= ifmca
->idev
->dev
->ifindex
;
4029 if (ipv6_addr_scope(&ifmca
->mca_addr
) & IFA_SITE
)
4030 scope
= RT_SCOPE_SITE
;
4032 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
4036 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
4037 if (nla_put(skb
, IFA_MULTICAST
, 16, &ifmca
->mca_addr
) < 0 ||
4038 put_cacheinfo(skb
, ifmca
->mca_cstamp
, ifmca
->mca_tstamp
,
4039 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
4040 nlmsg_cancel(skb
, nlh
);
4044 return nlmsg_end(skb
, nlh
);
4047 static int inet6_fill_ifacaddr(struct sk_buff
*skb
, struct ifacaddr6
*ifaca
,
4048 u32 portid
, u32 seq
, int event
, unsigned int flags
)
4050 struct nlmsghdr
*nlh
;
4051 u8 scope
= RT_SCOPE_UNIVERSE
;
4052 int ifindex
= ifaca
->aca_idev
->dev
->ifindex
;
4054 if (ipv6_addr_scope(&ifaca
->aca_addr
) & IFA_SITE
)
4055 scope
= RT_SCOPE_SITE
;
4057 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(struct ifaddrmsg
), flags
);
4061 put_ifaddrmsg(nlh
, 128, IFA_F_PERMANENT
, scope
, ifindex
);
4062 if (nla_put(skb
, IFA_ANYCAST
, 16, &ifaca
->aca_addr
) < 0 ||
4063 put_cacheinfo(skb
, ifaca
->aca_cstamp
, ifaca
->aca_tstamp
,
4064 INFINITY_LIFE_TIME
, INFINITY_LIFE_TIME
) < 0) {
4065 nlmsg_cancel(skb
, nlh
);
4069 return nlmsg_end(skb
, nlh
);
4078 /* called with rcu_read_lock() */
4079 static int in6_dump_addrs(struct inet6_dev
*idev
, struct sk_buff
*skb
,
4080 struct netlink_callback
*cb
, enum addr_type_t type
,
4081 int s_ip_idx
, int *p_ip_idx
)
4083 struct ifmcaddr6
*ifmca
;
4084 struct ifacaddr6
*ifaca
;
4086 int ip_idx
= *p_ip_idx
;
4088 read_lock_bh(&idev
->lock
);
4090 case UNICAST_ADDR
: {
4091 struct inet6_ifaddr
*ifa
;
4093 /* unicast address incl. temp addr */
4094 list_for_each_entry(ifa
, &idev
->addr_list
, if_list
) {
4095 if (++ip_idx
< s_ip_idx
)
4097 err
= inet6_fill_ifaddr(skb
, ifa
,
4098 NETLINK_CB(cb
->skb
).portid
,
4104 nl_dump_check_consistent(cb
, nlmsg_hdr(skb
));
4108 case MULTICAST_ADDR
:
4109 /* multicast address */
4110 for (ifmca
= idev
->mc_list
; ifmca
;
4111 ifmca
= ifmca
->next
, ip_idx
++) {
4112 if (ip_idx
< s_ip_idx
)
4114 err
= inet6_fill_ifmcaddr(skb
, ifmca
,
4115 NETLINK_CB(cb
->skb
).portid
,
4124 /* anycast address */
4125 for (ifaca
= idev
->ac_list
; ifaca
;
4126 ifaca
= ifaca
->aca_next
, ip_idx
++) {
4127 if (ip_idx
< s_ip_idx
)
4129 err
= inet6_fill_ifacaddr(skb
, ifaca
,
4130 NETLINK_CB(cb
->skb
).portid
,
4141 read_unlock_bh(&idev
->lock
);
4146 static int inet6_dump_addr(struct sk_buff
*skb
, struct netlink_callback
*cb
,
4147 enum addr_type_t type
)
4149 struct net
*net
= sock_net(skb
->sk
);
4152 int s_idx
, s_ip_idx
;
4153 struct net_device
*dev
;
4154 struct inet6_dev
*idev
;
4155 struct hlist_head
*head
;
4158 s_idx
= idx
= cb
->args
[1];
4159 s_ip_idx
= ip_idx
= cb
->args
[2];
4162 cb
->seq
= atomic_read(&net
->ipv6
.dev_addr_genid
) ^ net
->dev_base_seq
;
4163 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
4165 head
= &net
->dev_index_head
[h
];
4166 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
4169 if (h
> s_h
|| idx
> s_idx
)
4172 idev
= __in6_dev_get(dev
);
4176 if (in6_dump_addrs(idev
, skb
, cb
, type
,
4177 s_ip_idx
, &ip_idx
) <= 0)
4187 cb
->args
[2] = ip_idx
;
4192 static int inet6_dump_ifaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4194 enum addr_type_t type
= UNICAST_ADDR
;
4196 return inet6_dump_addr(skb
, cb
, type
);
4199 static int inet6_dump_ifmcaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4201 enum addr_type_t type
= MULTICAST_ADDR
;
4203 return inet6_dump_addr(skb
, cb
, type
);
4207 static int inet6_dump_ifacaddr(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4209 enum addr_type_t type
= ANYCAST_ADDR
;
4211 return inet6_dump_addr(skb
, cb
, type
);
4214 static int inet6_rtm_getaddr(struct sk_buff
*in_skb
, struct nlmsghdr
*nlh
)
4216 struct net
*net
= sock_net(in_skb
->sk
);
4217 struct ifaddrmsg
*ifm
;
4218 struct nlattr
*tb
[IFA_MAX
+1];
4219 struct in6_addr
*addr
= NULL
, *peer
;
4220 struct net_device
*dev
= NULL
;
4221 struct inet6_ifaddr
*ifa
;
4222 struct sk_buff
*skb
;
4225 err
= nlmsg_parse(nlh
, sizeof(*ifm
), tb
, IFA_MAX
, ifa_ipv6_policy
);
4229 addr
= extract_addr(tb
[IFA_ADDRESS
], tb
[IFA_LOCAL
], &peer
);
4235 ifm
= nlmsg_data(nlh
);
4237 dev
= __dev_get_by_index(net
, ifm
->ifa_index
);
4239 ifa
= ipv6_get_ifaddr(net
, addr
, dev
, 1);
4241 err
= -EADDRNOTAVAIL
;
4245 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_KERNEL
);
4251 err
= inet6_fill_ifaddr(skb
, ifa
, NETLINK_CB(in_skb
).portid
,
4252 nlh
->nlmsg_seq
, RTM_NEWADDR
, 0);
4254 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4255 WARN_ON(err
== -EMSGSIZE
);
4259 err
= rtnl_unicast(skb
, net
, NETLINK_CB(in_skb
).portid
);
4266 static void inet6_ifa_notify(int event
, struct inet6_ifaddr
*ifa
)
4268 struct sk_buff
*skb
;
4269 struct net
*net
= dev_net(ifa
->idev
->dev
);
4272 skb
= nlmsg_new(inet6_ifaddr_msgsize(), GFP_ATOMIC
);
4276 err
= inet6_fill_ifaddr(skb
, ifa
, 0, 0, event
, 0);
4278 /* -EMSGSIZE implies BUG in inet6_ifaddr_msgsize() */
4279 WARN_ON(err
== -EMSGSIZE
);
4283 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFADDR
, NULL
, GFP_ATOMIC
);
4287 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFADDR
, err
);
4290 static inline void ipv6_store_devconf(struct ipv6_devconf
*cnf
,
4291 __s32
*array
, int bytes
)
4293 BUG_ON(bytes
< (DEVCONF_MAX
* 4));
4295 memset(array
, 0, bytes
);
4296 array
[DEVCONF_FORWARDING
] = cnf
->forwarding
;
4297 array
[DEVCONF_HOPLIMIT
] = cnf
->hop_limit
;
4298 array
[DEVCONF_MTU6
] = cnf
->mtu6
;
4299 array
[DEVCONF_ACCEPT_RA
] = cnf
->accept_ra
;
4300 array
[DEVCONF_ACCEPT_REDIRECTS
] = cnf
->accept_redirects
;
4301 array
[DEVCONF_AUTOCONF
] = cnf
->autoconf
;
4302 array
[DEVCONF_DAD_TRANSMITS
] = cnf
->dad_transmits
;
4303 array
[DEVCONF_RTR_SOLICITS
] = cnf
->rtr_solicits
;
4304 array
[DEVCONF_RTR_SOLICIT_INTERVAL
] =
4305 jiffies_to_msecs(cnf
->rtr_solicit_interval
);
4306 array
[DEVCONF_RTR_SOLICIT_DELAY
] =
4307 jiffies_to_msecs(cnf
->rtr_solicit_delay
);
4308 array
[DEVCONF_FORCE_MLD_VERSION
] = cnf
->force_mld_version
;
4309 array
[DEVCONF_MLDV1_UNSOLICITED_REPORT_INTERVAL
] =
4310 jiffies_to_msecs(cnf
->mldv1_unsolicited_report_interval
);
4311 array
[DEVCONF_MLDV2_UNSOLICITED_REPORT_INTERVAL
] =
4312 jiffies_to_msecs(cnf
->mldv2_unsolicited_report_interval
);
4313 array
[DEVCONF_USE_TEMPADDR
] = cnf
->use_tempaddr
;
4314 array
[DEVCONF_TEMP_VALID_LFT
] = cnf
->temp_valid_lft
;
4315 array
[DEVCONF_TEMP_PREFERED_LFT
] = cnf
->temp_prefered_lft
;
4316 array
[DEVCONF_REGEN_MAX_RETRY
] = cnf
->regen_max_retry
;
4317 array
[DEVCONF_MAX_DESYNC_FACTOR
] = cnf
->max_desync_factor
;
4318 array
[DEVCONF_MAX_ADDRESSES
] = cnf
->max_addresses
;
4319 array
[DEVCONF_ACCEPT_RA_DEFRTR
] = cnf
->accept_ra_defrtr
;
4320 array
[DEVCONF_ACCEPT_RA_PINFO
] = cnf
->accept_ra_pinfo
;
4321 #ifdef CONFIG_IPV6_ROUTER_PREF
4322 array
[DEVCONF_ACCEPT_RA_RTR_PREF
] = cnf
->accept_ra_rtr_pref
;
4323 array
[DEVCONF_RTR_PROBE_INTERVAL
] =
4324 jiffies_to_msecs(cnf
->rtr_probe_interval
);
4325 #ifdef CONFIG_IPV6_ROUTE_INFO
4326 array
[DEVCONF_ACCEPT_RA_RT_INFO_MAX_PLEN
] = cnf
->accept_ra_rt_info_max_plen
;
4329 array
[DEVCONF_PROXY_NDP
] = cnf
->proxy_ndp
;
4330 array
[DEVCONF_ACCEPT_SOURCE_ROUTE
] = cnf
->accept_source_route
;
4331 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
4332 array
[DEVCONF_OPTIMISTIC_DAD
] = cnf
->optimistic_dad
;
4334 #ifdef CONFIG_IPV6_MROUTE
4335 array
[DEVCONF_MC_FORWARDING
] = cnf
->mc_forwarding
;
4337 array
[DEVCONF_DISABLE_IPV6
] = cnf
->disable_ipv6
;
4338 array
[DEVCONF_ACCEPT_DAD
] = cnf
->accept_dad
;
4339 array
[DEVCONF_FORCE_TLLAO
] = cnf
->force_tllao
;
4340 array
[DEVCONF_NDISC_NOTIFY
] = cnf
->ndisc_notify
;
4341 array
[DEVCONF_SUPPRESS_FRAG_NDISC
] = cnf
->suppress_frag_ndisc
;
4342 array
[DEVCONF_ACCEPT_RA_FROM_LOCAL
] = cnf
->accept_ra_from_local
;
4345 static inline size_t inet6_ifla6_size(void)
4347 return nla_total_size(4) /* IFLA_INET6_FLAGS */
4348 + nla_total_size(sizeof(struct ifla_cacheinfo
))
4349 + nla_total_size(DEVCONF_MAX
* 4) /* IFLA_INET6_CONF */
4350 + nla_total_size(IPSTATS_MIB_MAX
* 8) /* IFLA_INET6_STATS */
4351 + nla_total_size(ICMP6_MIB_MAX
* 8) /* IFLA_INET6_ICMP6STATS */
4352 + nla_total_size(sizeof(struct in6_addr
)); /* IFLA_INET6_TOKEN */
4355 static inline size_t inet6_if_nlmsg_size(void)
4357 return NLMSG_ALIGN(sizeof(struct ifinfomsg
))
4358 + nla_total_size(IFNAMSIZ
) /* IFLA_IFNAME */
4359 + nla_total_size(MAX_ADDR_LEN
) /* IFLA_ADDRESS */
4360 + nla_total_size(4) /* IFLA_MTU */
4361 + nla_total_size(4) /* IFLA_LINK */
4362 + nla_total_size(inet6_ifla6_size()); /* IFLA_PROTINFO */
4365 static inline void __snmp6_fill_statsdev(u64
*stats
, atomic_long_t
*mib
,
4366 int items
, int bytes
)
4369 int pad
= bytes
- sizeof(u64
) * items
;
4372 /* Use put_unaligned() because stats may not be aligned for u64. */
4373 put_unaligned(items
, &stats
[0]);
4374 for (i
= 1; i
< items
; i
++)
4375 put_unaligned(atomic_long_read(&mib
[i
]), &stats
[i
]);
4377 memset(&stats
[items
], 0, pad
);
4380 static inline void __snmp6_fill_stats64(u64
*stats
, void __percpu
*mib
,
4381 int items
, int bytes
, size_t syncpoff
)
4384 int pad
= bytes
- sizeof(u64
) * items
;
4387 /* Use put_unaligned() because stats may not be aligned for u64. */
4388 put_unaligned(items
, &stats
[0]);
4389 for (i
= 1; i
< items
; i
++)
4390 put_unaligned(snmp_fold_field64(mib
, i
, syncpoff
), &stats
[i
]);
4392 memset(&stats
[items
], 0, pad
);
4395 static void snmp6_fill_stats(u64
*stats
, struct inet6_dev
*idev
, int attrtype
,
4399 case IFLA_INET6_STATS
:
4400 __snmp6_fill_stats64(stats
, idev
->stats
.ipv6
,
4401 IPSTATS_MIB_MAX
, bytes
, offsetof(struct ipstats_mib
, syncp
));
4403 case IFLA_INET6_ICMP6STATS
:
4404 __snmp6_fill_statsdev(stats
, idev
->stats
.icmpv6dev
->mibs
, ICMP6_MIB_MAX
, bytes
);
4409 static int inet6_fill_ifla6_attrs(struct sk_buff
*skb
, struct inet6_dev
*idev
)
4412 struct ifla_cacheinfo ci
;
4414 if (nla_put_u32(skb
, IFLA_INET6_FLAGS
, idev
->if_flags
))
4415 goto nla_put_failure
;
4416 ci
.max_reasm_len
= IPV6_MAXPLEN
;
4417 ci
.tstamp
= cstamp_delta(idev
->tstamp
);
4418 ci
.reachable_time
= jiffies_to_msecs(idev
->nd_parms
->reachable_time
);
4419 ci
.retrans_time
= jiffies_to_msecs(NEIGH_VAR(idev
->nd_parms
, RETRANS_TIME
));
4420 if (nla_put(skb
, IFLA_INET6_CACHEINFO
, sizeof(ci
), &ci
))
4421 goto nla_put_failure
;
4422 nla
= nla_reserve(skb
, IFLA_INET6_CONF
, DEVCONF_MAX
* sizeof(s32
));
4424 goto nla_put_failure
;
4425 ipv6_store_devconf(&idev
->cnf
, nla_data(nla
), nla_len(nla
));
4427 /* XXX - MC not implemented */
4429 nla
= nla_reserve(skb
, IFLA_INET6_STATS
, IPSTATS_MIB_MAX
* sizeof(u64
));
4431 goto nla_put_failure
;
4432 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_STATS
, nla_len(nla
));
4434 nla
= nla_reserve(skb
, IFLA_INET6_ICMP6STATS
, ICMP6_MIB_MAX
* sizeof(u64
));
4436 goto nla_put_failure
;
4437 snmp6_fill_stats(nla_data(nla
), idev
, IFLA_INET6_ICMP6STATS
, nla_len(nla
));
4439 nla
= nla_reserve(skb
, IFLA_INET6_TOKEN
, sizeof(struct in6_addr
));
4441 goto nla_put_failure
;
4443 if (nla_put_u8(skb
, IFLA_INET6_ADDR_GEN_MODE
, idev
->addr_gen_mode
))
4444 goto nla_put_failure
;
4446 read_lock_bh(&idev
->lock
);
4447 memcpy(nla_data(nla
), idev
->token
.s6_addr
, nla_len(nla
));
4448 read_unlock_bh(&idev
->lock
);
4456 static size_t inet6_get_link_af_size(const struct net_device
*dev
)
4458 if (!__in6_dev_get(dev
))
4461 return inet6_ifla6_size();
4464 static int inet6_fill_link_af(struct sk_buff
*skb
, const struct net_device
*dev
)
4466 struct inet6_dev
*idev
= __in6_dev_get(dev
);
4471 if (inet6_fill_ifla6_attrs(skb
, idev
) < 0)
4477 static int inet6_set_iftoken(struct inet6_dev
*idev
, struct in6_addr
*token
)
4479 struct inet6_ifaddr
*ifp
;
4480 struct net_device
*dev
= idev
->dev
;
4481 bool update_rs
= false;
4482 struct in6_addr ll_addr
;
4488 if (ipv6_addr_any(token
))
4490 if (dev
->flags
& (IFF_LOOPBACK
| IFF_NOARP
))
4492 if (!ipv6_accept_ra(idev
))
4494 if (idev
->cnf
.rtr_solicits
<= 0)
4497 write_lock_bh(&idev
->lock
);
4499 BUILD_BUG_ON(sizeof(token
->s6_addr
) != 16);
4500 memcpy(idev
->token
.s6_addr
+ 8, token
->s6_addr
+ 8, 8);
4502 write_unlock_bh(&idev
->lock
);
4504 if (!idev
->dead
&& (idev
->if_flags
& IF_READY
) &&
4505 !ipv6_get_lladdr(dev
, &ll_addr
, IFA_F_TENTATIVE
|
4506 IFA_F_OPTIMISTIC
)) {
4508 /* If we're not ready, then normal ifup will take care
4509 * of this. Otherwise, we need to request our rs here.
4511 ndisc_send_rs(dev
, &ll_addr
, &in6addr_linklocal_allrouters
);
4515 write_lock_bh(&idev
->lock
);
4518 idev
->if_flags
|= IF_RS_SENT
;
4519 idev
->rs_probes
= 1;
4520 addrconf_mod_rs_timer(idev
, idev
->cnf
.rtr_solicit_interval
);
4523 /* Well, that's kinda nasty ... */
4524 list_for_each_entry(ifp
, &idev
->addr_list
, if_list
) {
4525 spin_lock(&ifp
->lock
);
4526 if (ifp
->tokenized
) {
4528 ifp
->prefered_lft
= 0;
4530 spin_unlock(&ifp
->lock
);
4533 write_unlock_bh(&idev
->lock
);
4534 addrconf_verify_rtnl();
4538 static int inet6_set_link_af(struct net_device
*dev
, const struct nlattr
*nla
)
4541 struct inet6_dev
*idev
= __in6_dev_get(dev
);
4542 struct nlattr
*tb
[IFLA_INET6_MAX
+ 1];
4545 return -EAFNOSUPPORT
;
4547 if (nla_parse_nested(tb
, IFLA_INET6_MAX
, nla
, NULL
) < 0)
4550 if (tb
[IFLA_INET6_TOKEN
]) {
4551 err
= inet6_set_iftoken(idev
, nla_data(tb
[IFLA_INET6_TOKEN
]));
4556 if (tb
[IFLA_INET6_ADDR_GEN_MODE
]) {
4557 u8 mode
= nla_get_u8(tb
[IFLA_INET6_ADDR_GEN_MODE
]);
4559 if (mode
!= IN6_ADDR_GEN_MODE_EUI64
&&
4560 mode
!= IN6_ADDR_GEN_MODE_NONE
)
4562 idev
->addr_gen_mode
= mode
;
4569 static int inet6_fill_ifinfo(struct sk_buff
*skb
, struct inet6_dev
*idev
,
4570 u32 portid
, u32 seq
, int event
, unsigned int flags
)
4572 struct net_device
*dev
= idev
->dev
;
4573 struct ifinfomsg
*hdr
;
4574 struct nlmsghdr
*nlh
;
4577 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*hdr
), flags
);
4581 hdr
= nlmsg_data(nlh
);
4582 hdr
->ifi_family
= AF_INET6
;
4584 hdr
->ifi_type
= dev
->type
;
4585 hdr
->ifi_index
= dev
->ifindex
;
4586 hdr
->ifi_flags
= dev_get_flags(dev
);
4587 hdr
->ifi_change
= 0;
4589 if (nla_put_string(skb
, IFLA_IFNAME
, dev
->name
) ||
4591 nla_put(skb
, IFLA_ADDRESS
, dev
->addr_len
, dev
->dev_addr
)) ||
4592 nla_put_u32(skb
, IFLA_MTU
, dev
->mtu
) ||
4593 (dev
->ifindex
!= dev
->iflink
&&
4594 nla_put_u32(skb
, IFLA_LINK
, dev
->iflink
)))
4595 goto nla_put_failure
;
4596 protoinfo
= nla_nest_start(skb
, IFLA_PROTINFO
);
4597 if (protoinfo
== NULL
)
4598 goto nla_put_failure
;
4600 if (inet6_fill_ifla6_attrs(skb
, idev
) < 0)
4601 goto nla_put_failure
;
4603 nla_nest_end(skb
, protoinfo
);
4604 return nlmsg_end(skb
, nlh
);
4607 nlmsg_cancel(skb
, nlh
);
4611 static int inet6_dump_ifinfo(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4613 struct net
*net
= sock_net(skb
->sk
);
4616 struct net_device
*dev
;
4617 struct inet6_dev
*idev
;
4618 struct hlist_head
*head
;
4621 s_idx
= cb
->args
[1];
4624 for (h
= s_h
; h
< NETDEV_HASHENTRIES
; h
++, s_idx
= 0) {
4626 head
= &net
->dev_index_head
[h
];
4627 hlist_for_each_entry_rcu(dev
, head
, index_hlist
) {
4630 idev
= __in6_dev_get(dev
);
4633 if (inet6_fill_ifinfo(skb
, idev
,
4634 NETLINK_CB(cb
->skb
).portid
,
4636 RTM_NEWLINK
, NLM_F_MULTI
) <= 0)
4650 void inet6_ifinfo_notify(int event
, struct inet6_dev
*idev
)
4652 struct sk_buff
*skb
;
4653 struct net
*net
= dev_net(idev
->dev
);
4656 skb
= nlmsg_new(inet6_if_nlmsg_size(), GFP_ATOMIC
);
4660 err
= inet6_fill_ifinfo(skb
, idev
, 0, 0, event
, 0);
4662 /* -EMSGSIZE implies BUG in inet6_if_nlmsg_size() */
4663 WARN_ON(err
== -EMSGSIZE
);
4667 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_IFINFO
, NULL
, GFP_ATOMIC
);
4671 rtnl_set_sk_err(net
, RTNLGRP_IPV6_IFINFO
, err
);
4674 static inline size_t inet6_prefix_nlmsg_size(void)
4676 return NLMSG_ALIGN(sizeof(struct prefixmsg
))
4677 + nla_total_size(sizeof(struct in6_addr
))
4678 + nla_total_size(sizeof(struct prefix_cacheinfo
));
4681 static int inet6_fill_prefix(struct sk_buff
*skb
, struct inet6_dev
*idev
,
4682 struct prefix_info
*pinfo
, u32 portid
, u32 seq
,
4683 int event
, unsigned int flags
)
4685 struct prefixmsg
*pmsg
;
4686 struct nlmsghdr
*nlh
;
4687 struct prefix_cacheinfo ci
;
4689 nlh
= nlmsg_put(skb
, portid
, seq
, event
, sizeof(*pmsg
), flags
);
4693 pmsg
= nlmsg_data(nlh
);
4694 pmsg
->prefix_family
= AF_INET6
;
4695 pmsg
->prefix_pad1
= 0;
4696 pmsg
->prefix_pad2
= 0;
4697 pmsg
->prefix_ifindex
= idev
->dev
->ifindex
;
4698 pmsg
->prefix_len
= pinfo
->prefix_len
;
4699 pmsg
->prefix_type
= pinfo
->type
;
4700 pmsg
->prefix_pad3
= 0;
4701 pmsg
->prefix_flags
= 0;
4703 pmsg
->prefix_flags
|= IF_PREFIX_ONLINK
;
4704 if (pinfo
->autoconf
)
4705 pmsg
->prefix_flags
|= IF_PREFIX_AUTOCONF
;
4707 if (nla_put(skb
, PREFIX_ADDRESS
, sizeof(pinfo
->prefix
), &pinfo
->prefix
))
4708 goto nla_put_failure
;
4709 ci
.preferred_time
= ntohl(pinfo
->prefered
);
4710 ci
.valid_time
= ntohl(pinfo
->valid
);
4711 if (nla_put(skb
, PREFIX_CACHEINFO
, sizeof(ci
), &ci
))
4712 goto nla_put_failure
;
4713 return nlmsg_end(skb
, nlh
);
4716 nlmsg_cancel(skb
, nlh
);
4720 static void inet6_prefix_notify(int event
, struct inet6_dev
*idev
,
4721 struct prefix_info
*pinfo
)
4723 struct sk_buff
*skb
;
4724 struct net
*net
= dev_net(idev
->dev
);
4727 skb
= nlmsg_new(inet6_prefix_nlmsg_size(), GFP_ATOMIC
);
4731 err
= inet6_fill_prefix(skb
, idev
, pinfo
, 0, 0, event
, 0);
4733 /* -EMSGSIZE implies BUG in inet6_prefix_nlmsg_size() */
4734 WARN_ON(err
== -EMSGSIZE
);
4738 rtnl_notify(skb
, net
, 0, RTNLGRP_IPV6_PREFIX
, NULL
, GFP_ATOMIC
);
4742 rtnl_set_sk_err(net
, RTNLGRP_IPV6_PREFIX
, err
);
4745 static void __ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
4747 struct net
*net
= dev_net(ifp
->idev
->dev
);
4752 inet6_ifa_notify(event
? : RTM_NEWADDR
, ifp
);
4757 * If the address was optimistic
4758 * we inserted the route at the start of
4759 * our DAD process, so we don't need
4762 if (!(ifp
->rt
->rt6i_node
))
4763 ip6_ins_rt(ifp
->rt
);
4764 if (ifp
->idev
->cnf
.forwarding
)
4765 addrconf_join_anycast(ifp
);
4766 if (!ipv6_addr_any(&ifp
->peer_addr
))
4767 addrconf_prefix_route(&ifp
->peer_addr
, 128,
4768 ifp
->idev
->dev
, 0, 0);
4771 if (ifp
->idev
->cnf
.forwarding
)
4772 addrconf_leave_anycast(ifp
);
4773 addrconf_leave_solict(ifp
->idev
, &ifp
->addr
);
4774 if (!ipv6_addr_any(&ifp
->peer_addr
)) {
4775 struct rt6_info
*rt
;
4777 rt
= addrconf_get_prefix_route(&ifp
->peer_addr
, 128,
4778 ifp
->idev
->dev
, 0, 0);
4779 if (rt
&& ip6_del_rt(rt
))
4782 dst_hold(&ifp
->rt
->dst
);
4784 if (ip6_del_rt(ifp
->rt
))
4785 dst_free(&ifp
->rt
->dst
);
4787 rt_genid_bump_ipv6(net
);
4790 atomic_inc(&net
->ipv6
.dev_addr_genid
);
4793 static void ipv6_ifa_notify(int event
, struct inet6_ifaddr
*ifp
)
4796 if (likely(ifp
->idev
->dead
== 0))
4797 __ipv6_ifa_notify(event
, ifp
);
4798 rcu_read_unlock_bh();
4801 #ifdef CONFIG_SYSCTL
4804 int addrconf_sysctl_forward(struct ctl_table
*ctl
, int write
,
4805 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4807 int *valp
= ctl
->data
;
4810 struct ctl_table lctl
;
4814 * ctl->data points to idev->cnf.forwarding, we should
4815 * not modify it until we get the rtnl lock.
4820 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
4823 ret
= addrconf_fixup_forwarding(ctl
, valp
, val
);
4829 static void dev_disable_change(struct inet6_dev
*idev
)
4831 struct netdev_notifier_info info
;
4833 if (!idev
|| !idev
->dev
)
4836 netdev_notifier_info_init(&info
, idev
->dev
);
4837 if (idev
->cnf
.disable_ipv6
)
4838 addrconf_notify(NULL
, NETDEV_DOWN
, &info
);
4840 addrconf_notify(NULL
, NETDEV_UP
, &info
);
4843 static void addrconf_disable_change(struct net
*net
, __s32 newf
)
4845 struct net_device
*dev
;
4846 struct inet6_dev
*idev
;
4849 for_each_netdev_rcu(net
, dev
) {
4850 idev
= __in6_dev_get(dev
);
4852 int changed
= (!idev
->cnf
.disable_ipv6
) ^ (!newf
);
4853 idev
->cnf
.disable_ipv6
= newf
;
4855 dev_disable_change(idev
);
4861 static int addrconf_disable_ipv6(struct ctl_table
*table
, int *p
, int newf
)
4866 if (!rtnl_trylock())
4867 return restart_syscall();
4869 net
= (struct net
*)table
->extra2
;
4873 if (p
== &net
->ipv6
.devconf_dflt
->disable_ipv6
) {
4878 if (p
== &net
->ipv6
.devconf_all
->disable_ipv6
) {
4879 net
->ipv6
.devconf_dflt
->disable_ipv6
= newf
;
4880 addrconf_disable_change(net
, newf
);
4881 } else if ((!newf
) ^ (!old
))
4882 dev_disable_change((struct inet6_dev
*)table
->extra1
);
4889 int addrconf_sysctl_disable(struct ctl_table
*ctl
, int write
,
4890 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4892 int *valp
= ctl
->data
;
4895 struct ctl_table lctl
;
4899 * ctl->data points to idev->cnf.disable_ipv6, we should
4900 * not modify it until we get the rtnl lock.
4905 ret
= proc_dointvec(&lctl
, write
, buffer
, lenp
, ppos
);
4908 ret
= addrconf_disable_ipv6(ctl
, valp
, val
);
4915 int addrconf_sysctl_proxy_ndp(struct ctl_table
*ctl
, int write
,
4916 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
4918 int *valp
= ctl
->data
;
4923 ret
= proc_dointvec(ctl
, write
, buffer
, lenp
, ppos
);
4926 if (write
&& old
!= new) {
4927 struct net
*net
= ctl
->extra2
;
4929 if (!rtnl_trylock())
4930 return restart_syscall();
4932 if (valp
== &net
->ipv6
.devconf_dflt
->proxy_ndp
)
4933 inet6_netconf_notify_devconf(net
, NETCONFA_PROXY_NEIGH
,
4934 NETCONFA_IFINDEX_DEFAULT
,
4935 net
->ipv6
.devconf_dflt
);
4936 else if (valp
== &net
->ipv6
.devconf_all
->proxy_ndp
)
4937 inet6_netconf_notify_devconf(net
, NETCONFA_PROXY_NEIGH
,
4938 NETCONFA_IFINDEX_ALL
,
4939 net
->ipv6
.devconf_all
);
4941 struct inet6_dev
*idev
= ctl
->extra1
;
4943 inet6_netconf_notify_devconf(net
, NETCONFA_PROXY_NEIGH
,
4954 static struct addrconf_sysctl_table
4956 struct ctl_table_header
*sysctl_header
;
4957 struct ctl_table addrconf_vars
[DEVCONF_MAX
+1];
4958 } addrconf_sysctl __read_mostly
= {
4959 .sysctl_header
= NULL
,
4962 .procname
= "forwarding",
4963 .data
= &ipv6_devconf
.forwarding
,
4964 .maxlen
= sizeof(int),
4966 .proc_handler
= addrconf_sysctl_forward
,
4969 .procname
= "hop_limit",
4970 .data
= &ipv6_devconf
.hop_limit
,
4971 .maxlen
= sizeof(int),
4973 .proc_handler
= proc_dointvec
,
4977 .data
= &ipv6_devconf
.mtu6
,
4978 .maxlen
= sizeof(int),
4980 .proc_handler
= proc_dointvec
,
4983 .procname
= "accept_ra",
4984 .data
= &ipv6_devconf
.accept_ra
,
4985 .maxlen
= sizeof(int),
4987 .proc_handler
= proc_dointvec
,
4990 .procname
= "accept_redirects",
4991 .data
= &ipv6_devconf
.accept_redirects
,
4992 .maxlen
= sizeof(int),
4994 .proc_handler
= proc_dointvec
,
4997 .procname
= "autoconf",
4998 .data
= &ipv6_devconf
.autoconf
,
4999 .maxlen
= sizeof(int),
5001 .proc_handler
= proc_dointvec
,
5004 .procname
= "dad_transmits",
5005 .data
= &ipv6_devconf
.dad_transmits
,
5006 .maxlen
= sizeof(int),
5008 .proc_handler
= proc_dointvec
,
5011 .procname
= "router_solicitations",
5012 .data
= &ipv6_devconf
.rtr_solicits
,
5013 .maxlen
= sizeof(int),
5015 .proc_handler
= proc_dointvec
,
5018 .procname
= "router_solicitation_interval",
5019 .data
= &ipv6_devconf
.rtr_solicit_interval
,
5020 .maxlen
= sizeof(int),
5022 .proc_handler
= proc_dointvec_jiffies
,
5025 .procname
= "router_solicitation_delay",
5026 .data
= &ipv6_devconf
.rtr_solicit_delay
,
5027 .maxlen
= sizeof(int),
5029 .proc_handler
= proc_dointvec_jiffies
,
5032 .procname
= "force_mld_version",
5033 .data
= &ipv6_devconf
.force_mld_version
,
5034 .maxlen
= sizeof(int),
5036 .proc_handler
= proc_dointvec
,
5039 .procname
= "mldv1_unsolicited_report_interval",
5041 &ipv6_devconf
.mldv1_unsolicited_report_interval
,
5042 .maxlen
= sizeof(int),
5044 .proc_handler
= proc_dointvec_ms_jiffies
,
5047 .procname
= "mldv2_unsolicited_report_interval",
5049 &ipv6_devconf
.mldv2_unsolicited_report_interval
,
5050 .maxlen
= sizeof(int),
5052 .proc_handler
= proc_dointvec_ms_jiffies
,
5055 .procname
= "use_tempaddr",
5056 .data
= &ipv6_devconf
.use_tempaddr
,
5057 .maxlen
= sizeof(int),
5059 .proc_handler
= proc_dointvec
,
5062 .procname
= "temp_valid_lft",
5063 .data
= &ipv6_devconf
.temp_valid_lft
,
5064 .maxlen
= sizeof(int),
5066 .proc_handler
= proc_dointvec
,
5069 .procname
= "temp_prefered_lft",
5070 .data
= &ipv6_devconf
.temp_prefered_lft
,
5071 .maxlen
= sizeof(int),
5073 .proc_handler
= proc_dointvec
,
5076 .procname
= "regen_max_retry",
5077 .data
= &ipv6_devconf
.regen_max_retry
,
5078 .maxlen
= sizeof(int),
5080 .proc_handler
= proc_dointvec
,
5083 .procname
= "max_desync_factor",
5084 .data
= &ipv6_devconf
.max_desync_factor
,
5085 .maxlen
= sizeof(int),
5087 .proc_handler
= proc_dointvec
,
5090 .procname
= "max_addresses",
5091 .data
= &ipv6_devconf
.max_addresses
,
5092 .maxlen
= sizeof(int),
5094 .proc_handler
= proc_dointvec
,
5097 .procname
= "accept_ra_defrtr",
5098 .data
= &ipv6_devconf
.accept_ra_defrtr
,
5099 .maxlen
= sizeof(int),
5101 .proc_handler
= proc_dointvec
,
5104 .procname
= "accept_ra_pinfo",
5105 .data
= &ipv6_devconf
.accept_ra_pinfo
,
5106 .maxlen
= sizeof(int),
5108 .proc_handler
= proc_dointvec
,
5110 #ifdef CONFIG_IPV6_ROUTER_PREF
5112 .procname
= "accept_ra_rtr_pref",
5113 .data
= &ipv6_devconf
.accept_ra_rtr_pref
,
5114 .maxlen
= sizeof(int),
5116 .proc_handler
= proc_dointvec
,
5119 .procname
= "router_probe_interval",
5120 .data
= &ipv6_devconf
.rtr_probe_interval
,
5121 .maxlen
= sizeof(int),
5123 .proc_handler
= proc_dointvec_jiffies
,
5125 #ifdef CONFIG_IPV6_ROUTE_INFO
5127 .procname
= "accept_ra_rt_info_max_plen",
5128 .data
= &ipv6_devconf
.accept_ra_rt_info_max_plen
,
5129 .maxlen
= sizeof(int),
5131 .proc_handler
= proc_dointvec
,
5136 .procname
= "proxy_ndp",
5137 .data
= &ipv6_devconf
.proxy_ndp
,
5138 .maxlen
= sizeof(int),
5140 .proc_handler
= addrconf_sysctl_proxy_ndp
,
5143 .procname
= "accept_source_route",
5144 .data
= &ipv6_devconf
.accept_source_route
,
5145 .maxlen
= sizeof(int),
5147 .proc_handler
= proc_dointvec
,
5149 #ifdef CONFIG_IPV6_OPTIMISTIC_DAD
5151 .procname
= "optimistic_dad",
5152 .data
= &ipv6_devconf
.optimistic_dad
,
5153 .maxlen
= sizeof(int),
5155 .proc_handler
= proc_dointvec
,
5159 #ifdef CONFIG_IPV6_MROUTE
5161 .procname
= "mc_forwarding",
5162 .data
= &ipv6_devconf
.mc_forwarding
,
5163 .maxlen
= sizeof(int),
5165 .proc_handler
= proc_dointvec
,
5169 .procname
= "disable_ipv6",
5170 .data
= &ipv6_devconf
.disable_ipv6
,
5171 .maxlen
= sizeof(int),
5173 .proc_handler
= addrconf_sysctl_disable
,
5176 .procname
= "accept_dad",
5177 .data
= &ipv6_devconf
.accept_dad
,
5178 .maxlen
= sizeof(int),
5180 .proc_handler
= proc_dointvec
,
5183 .procname
= "force_tllao",
5184 .data
= &ipv6_devconf
.force_tllao
,
5185 .maxlen
= sizeof(int),
5187 .proc_handler
= proc_dointvec
5190 .procname
= "ndisc_notify",
5191 .data
= &ipv6_devconf
.ndisc_notify
,
5192 .maxlen
= sizeof(int),
5194 .proc_handler
= proc_dointvec
5197 .procname
= "suppress_frag_ndisc",
5198 .data
= &ipv6_devconf
.suppress_frag_ndisc
,
5199 .maxlen
= sizeof(int),
5201 .proc_handler
= proc_dointvec
5204 .procname
= "accept_ra_from_local",
5205 .data
= &ipv6_devconf
.accept_ra_from_local
,
5206 .maxlen
= sizeof(int),
5208 .proc_handler
= proc_dointvec
,
5216 static int __addrconf_sysctl_register(struct net
*net
, char *dev_name
,
5217 struct inet6_dev
*idev
, struct ipv6_devconf
*p
)
5220 struct addrconf_sysctl_table
*t
;
5221 char path
[sizeof("net/ipv6/conf/") + IFNAMSIZ
];
5223 t
= kmemdup(&addrconf_sysctl
, sizeof(*t
), GFP_KERNEL
);
5227 for (i
= 0; t
->addrconf_vars
[i
].data
; i
++) {
5228 t
->addrconf_vars
[i
].data
+= (char *)p
- (char *)&ipv6_devconf
;
5229 t
->addrconf_vars
[i
].extra1
= idev
; /* embedded; no ref */
5230 t
->addrconf_vars
[i
].extra2
= net
;
5233 snprintf(path
, sizeof(path
), "net/ipv6/conf/%s", dev_name
);
5235 t
->sysctl_header
= register_net_sysctl(net
, path
, t
->addrconf_vars
);
5236 if (t
->sysctl_header
== NULL
)
5248 static void __addrconf_sysctl_unregister(struct ipv6_devconf
*p
)
5250 struct addrconf_sysctl_table
*t
;
5252 if (p
->sysctl
== NULL
)
5257 unregister_net_sysctl_table(t
->sysctl_header
);
5261 static int addrconf_sysctl_register(struct inet6_dev
*idev
)
5265 if (!sysctl_dev_name_is_allowed(idev
->dev
->name
))
5268 err
= neigh_sysctl_register(idev
->dev
, idev
->nd_parms
,
5269 &ndisc_ifinfo_sysctl_change
);
5272 err
= __addrconf_sysctl_register(dev_net(idev
->dev
), idev
->dev
->name
,
5275 neigh_sysctl_unregister(idev
->nd_parms
);
5280 static void addrconf_sysctl_unregister(struct inet6_dev
*idev
)
5282 __addrconf_sysctl_unregister(&idev
->cnf
);
5283 neigh_sysctl_unregister(idev
->nd_parms
);
5289 static int __net_init
addrconf_init_net(struct net
*net
)
5292 struct ipv6_devconf
*all
, *dflt
;
5294 all
= kmemdup(&ipv6_devconf
, sizeof(ipv6_devconf
), GFP_KERNEL
);
5298 dflt
= kmemdup(&ipv6_devconf_dflt
, sizeof(ipv6_devconf_dflt
), GFP_KERNEL
);
5300 goto err_alloc_dflt
;
5302 /* these will be inherited by all namespaces */
5303 dflt
->autoconf
= ipv6_defaults
.autoconf
;
5304 dflt
->disable_ipv6
= ipv6_defaults
.disable_ipv6
;
5306 net
->ipv6
.devconf_all
= all
;
5307 net
->ipv6
.devconf_dflt
= dflt
;
5309 #ifdef CONFIG_SYSCTL
5310 err
= __addrconf_sysctl_register(net
, "all", NULL
, all
);
5314 err
= __addrconf_sysctl_register(net
, "default", NULL
, dflt
);
5320 #ifdef CONFIG_SYSCTL
5322 __addrconf_sysctl_unregister(all
);
5332 static void __net_exit
addrconf_exit_net(struct net
*net
)
5334 #ifdef CONFIG_SYSCTL
5335 __addrconf_sysctl_unregister(net
->ipv6
.devconf_dflt
);
5336 __addrconf_sysctl_unregister(net
->ipv6
.devconf_all
);
5338 if (!net_eq(net
, &init_net
)) {
5339 kfree(net
->ipv6
.devconf_dflt
);
5340 kfree(net
->ipv6
.devconf_all
);
5344 static struct pernet_operations addrconf_ops
= {
5345 .init
= addrconf_init_net
,
5346 .exit
= addrconf_exit_net
,
5349 static struct rtnl_af_ops inet6_ops
= {
5351 .fill_link_af
= inet6_fill_link_af
,
5352 .get_link_af_size
= inet6_get_link_af_size
,
5353 .set_link_af
= inet6_set_link_af
,
5357 * Init / cleanup code
5360 int __init
addrconf_init(void)
5362 struct inet6_dev
*idev
;
5365 err
= ipv6_addr_label_init();
5367 pr_crit("%s: cannot initialize default policy table: %d\n",
5372 err
= register_pernet_subsys(&addrconf_ops
);
5376 addrconf_wq
= create_workqueue("ipv6_addrconf");
5382 /* The addrconf netdev notifier requires that loopback_dev
5383 * has it's ipv6 private information allocated and setup
5384 * before it can bring up and give link-local addresses
5385 * to other devices which are up.
5387 * Unfortunately, loopback_dev is not necessarily the first
5388 * entry in the global dev_base list of net devices. In fact,
5389 * it is likely to be the very last entry on that list.
5390 * So this causes the notifier registry below to try and
5391 * give link-local addresses to all devices besides loopback_dev
5392 * first, then loopback_dev, which cases all the non-loopback_dev
5393 * devices to fail to get a link-local address.
5395 * So, as a temporary fix, allocate the ipv6 structure for
5396 * loopback_dev first by hand.
5397 * Longer term, all of the dependencies ipv6 has upon the loopback
5398 * device and it being up should be removed.
5401 idev
= ipv6_add_dev(init_net
.loopback_dev
);
5404 err
= PTR_ERR(idev
);
5408 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
5409 INIT_HLIST_HEAD(&inet6_addr_lst
[i
]);
5411 register_netdevice_notifier(&ipv6_dev_notf
);
5415 rtnl_af_register(&inet6_ops
);
5417 err
= __rtnl_register(PF_INET6
, RTM_GETLINK
, NULL
, inet6_dump_ifinfo
,
5422 /* Only the first call to __rtnl_register can fail */
5423 __rtnl_register(PF_INET6
, RTM_NEWADDR
, inet6_rtm_newaddr
, NULL
, NULL
);
5424 __rtnl_register(PF_INET6
, RTM_DELADDR
, inet6_rtm_deladdr
, NULL
, NULL
);
5425 __rtnl_register(PF_INET6
, RTM_GETADDR
, inet6_rtm_getaddr
,
5426 inet6_dump_ifaddr
, NULL
);
5427 __rtnl_register(PF_INET6
, RTM_GETMULTICAST
, NULL
,
5428 inet6_dump_ifmcaddr
, NULL
);
5429 __rtnl_register(PF_INET6
, RTM_GETANYCAST
, NULL
,
5430 inet6_dump_ifacaddr
, NULL
);
5431 __rtnl_register(PF_INET6
, RTM_GETNETCONF
, inet6_netconf_get_devconf
,
5432 inet6_netconf_dump_devconf
, NULL
);
5434 ipv6_addr_label_rtnl_register();
5438 rtnl_af_unregister(&inet6_ops
);
5439 unregister_netdevice_notifier(&ipv6_dev_notf
);
5441 destroy_workqueue(addrconf_wq
);
5443 unregister_pernet_subsys(&addrconf_ops
);
5445 ipv6_addr_label_cleanup();
5450 void addrconf_cleanup(void)
5452 struct net_device
*dev
;
5455 unregister_netdevice_notifier(&ipv6_dev_notf
);
5456 unregister_pernet_subsys(&addrconf_ops
);
5457 ipv6_addr_label_cleanup();
5461 __rtnl_af_unregister(&inet6_ops
);
5463 /* clean dev list */
5464 for_each_netdev(&init_net
, dev
) {
5465 if (__in6_dev_get(dev
) == NULL
)
5467 addrconf_ifdown(dev
, 1);
5469 addrconf_ifdown(init_net
.loopback_dev
, 2);
5474 spin_lock_bh(&addrconf_hash_lock
);
5475 for (i
= 0; i
< IN6_ADDR_HSIZE
; i
++)
5476 WARN_ON(!hlist_empty(&inet6_addr_lst
[i
]));
5477 spin_unlock_bh(&addrconf_hash_lock
);
5478 cancel_delayed_work(&addr_chk_work
);
5481 destroy_workqueue(addrconf_wq
);